阅读说明：本技术 收获机 (Harvesting machine ) 是由 林壮太郎 北原麻央 中林隆志 山冈京介 出口翔马 日田定范 高原一浩 齐藤直 堀内真 于 2018-05-23 设计创作，主要内容包括：具备：收获部(4),其设于机体的前部,收获田地的作物；多个作物传感器(31、32、33、34),其在左右方向上隔开间隔地配置于收获部(4),接触作物而检测作物的存在。并且,也可以具备：收获宽度检测部,其检测能够通过收获部(4)进行收获作业的可作业宽度中的、通过实际进行的收获作业收获的作物群所对应的收获宽度；行驶变速部,其使机体的行驶速度变速；速度控制部,其基于收获宽度检测部的检测结果,收获宽度越大则越将行驶变速部向低速侧操作,收获宽度越小则越将行驶变速部向高速侧操作。(The disclosed device is provided with: a harvesting part (4) which is arranged at the front part of the machine body and harvests crops in a field; and a plurality of crop sensors (31, 32, 33, 34) which are arranged at intervals in the left-right direction on the harvesting part (4) and contact the crops to detect the existence of the crops. Further, the present invention may further include: a harvesting width detection unit that detects a harvesting width corresponding to a group of crops harvested by an actually performed harvesting operation, among the operable widths at which the harvesting operation can be performed by the harvesting unit (4); a travel speed change unit that changes a travel speed of the machine body; and a speed control unit that operates the traveling transmission unit to the low speed side as the harvesting width is larger and operates the traveling transmission unit to the high speed side as the harvesting width is smaller, based on a detection result of the harvesting width detection unit.)

1. A harvester is provided with:

a harvesting part which is arranged at the front part of the machine body and harvests crops in a field;

and a plurality of crop sensors which are arranged at the harvesting part at intervals in the left-right direction and contact the crops to detect the existence of the crops.

2. The harvester of claim 1,

a conveying part for conveying the crops from the harvesting part to the machine body side is connected with the rear part of the harvesting part,

the harvesting part is provided with:

a transverse conveying body which is driven to rotate around a shaft core in the left-right direction so as to convey crops towards an inlet part of the conveying part in the left-right direction of the harvesting part;

a frame body which rotatably supports the lateral conveying body and is connected to the conveying section;

the crop sensor is provided to the frame body.

3. The harvester of claim 2,

the crop sensor is provided in a portion of the frame body located on a lower side of the lateral transfer body.

4. The harvester of claim 2 or 3,

the crop sensor is arranged at the bottom of the frame body.

5. The harvester of any one of claims 2 to 4,

the crop sensor is disposed at a position on the outer peripheral side of the rotation locus of the lateral transport body.

6. The harvester of any one of claims 2 to 5,

an opening portion is formed in the frame body,

the detection part of the crop sensor is provided in a state of protruding from the opening, and is configured to swing in contact with a crop.

7. The harvester of claim 6,

the harvester is provided with a gap filling member for filling a gap between the detection part and the opening part.

8. The harvester of claim 6 or 7,

the detection unit includes a wall portion extending downward at an outer peripheral portion of a portion protruding from the opening, and the portion protruding from the opening of the detection unit is formed in a box shape by the wall portion.

9. The harvester of any one of claims 6 to 8,

the detection unit includes: an upper stopper that determines a swing limit of an upper side of the detection unit by hitting the frame body; and a lower stopper portion that determines a lower swing limit of the detection portion by hitting the frame body.

10. The harvester of any one of claims 1 to 9,

a conveying part for conveying the crops from the harvesting part to the machine body side is connected with the rear part of the harvesting part,

the crop sensor is disposed at a right side position and a left side position in the harvesting section so as to be distributed with reference to a left-right center of the inlet portion of the conveying section.

11. The harvester of claim 10,

the crop sensor is provided in the harvesting section at a position on the right side with respect to the inlet section, at a position on the left side with respect to the inlet section, and at a position on the front side of the inlet section.

12. The harvester of claim 11,

the crop sensor disposed on the front side of the inlet in the harvesting section is disposed further toward the front side than the crop sensor disposed on the right side and the left side of the harvesting section with respect to the inlet.

13. The harvester of claim 11 or 12,

the crop sensor provided at a right side position and a left side position with respect to the inlet portion in the harvesting portion includes a detection portion that contacts the crop and swings around an axis in the front-rear direction.

14. The harvester of any one of claims 11 to 13,

the crop sensor provided in the harvesting unit on the front side of the inlet includes a detection unit that contacts the crop and swings around an axis in the left-right direction.

15. A harvester is provided with:

a harvesting part which is arranged at the front part of the machine body and harvests crops in a field;

a harvesting width detection unit that detects a harvesting width corresponding to a group of crops harvested by an actually performed harvesting operation among the operable widths in which the harvesting operation can be performed by the harvesting unit;

a travel speed change unit that changes a travel speed of the machine body;

and a speed control unit that operates the traveling transmission unit to a low speed side as the harvesting width increases and operates the traveling transmission unit to a high speed side as the harvesting width decreases, based on a detection result of the harvesting width detection unit.

16. The harvester of claim 15,

the harvest width detection unit includes a crop sensor that detects the presence of a crop by contacting the crop,

two or more of the crop sensors are provided in the harvesting unit at a distance in the left-right direction.

17. The harvester of claim 15 or 16,

the harvester is provided with a conveying part which is connected with the rear part of the harvesting part and conveys the harvested crops from the harvesting part to the machine body side,

a harvested crop sensor that comes into contact with the harvested crop to detect the presence of the crop is provided at an inlet portion of the conveying portion.

18. The harvester of claim 17,

the harvested crop sensors are provided at right and left side portions of an inlet portion of the conveying portion.

19. The harvester of claim 15 or 18,

the harvest width detection unit is provided with a crop sensor for detecting the presence of a crop by contacting the crop,

three or more crop sensors are disposed in the harvesting section at intervals in the left-right direction,

at least one of the crop sensors located at the center side is disposed at the front side of the inlet portion of the harvesting portion.

Technical Field

The invention relates to a harvester for harvesting vertical grain stalks.

Background

In a full-feed combine harvester as an example of a harvester, grain and straw in a field are harvested by a harvesting unit (corresponding to a harvesting unit), and the harvested grain and straw are supplied from the harvesting unit to a conveying unit and supplied by the conveying unit to a threshing device of a machine body.

In the above-described all-feed type combine harvester, in patent document 1, a conveying part is connected to a rear part of a harvesting part, and a straw sensor for detecting presence of straw is provided in a right part and a left part of an inlet part of the conveying part.

Thus, if the right straw sensor is in a detection state, it can be determined that the straw harvested at the right part of the harvesting section is being supplied to the inlet of the conveying section. If the left straw sensor is in a detection state, it can be determined that the straw harvested at the left part of the harvesting part is being supplied to the inlet of the conveying part.

In addition, for example, in rice planting, a field management system has been proposed in which various field operation data collected by a rice transplanter (or a seeder), a tractor, and a combine harvester is integrated with a GPS function to improve harvesting.

In patent document 2 disclosed as the above-described field management system, one field is divided into a plurality of small areas, and field operation data such as seedling planting data (seeding data) of a rice transplanter (seeder), tilling data of a tractor, and harvesting data (yield and taste) of a combine harvester are collected and stored in association with each area of the field, thereby improving seedling planting (seeding) of a rice transplanter (seeder) in the next year, tilling of a tractor, and the like.

Disclosure of Invention

Technical problem to be solved by the invention

The invention aims to improve the performance of various operations.

Specifically, it has been proposed to effectively use the detected harvest state of the harvest portion when the harvest state of the harvest portion is detected as disclosed in patent document 1.

An object of the present invention is to effectively utilize a detected harvesting state of a harvesting unit when the harvesting state of the harvesting unit is detected in a harvester.

In addition, in the field management system as described above, in order to improve the performance, it is necessary to improve the accuracy of field operation data of a rice transplanter (seeder), a tractor, and a combine.

An object of the present invention is to improve the accuracy of field work data of a harvester such as a combine harvester in a field management system.

Means for solving the problems

A harvester according to an embodiment of the present invention includes:

a harvesting part which is arranged at the front part of the machine body and harvests crops in a field;

and a plurality of crop sensors which are arranged at the harvesting part at intervals in the left-right direction and contact the crops to detect the existence of the crops.

In the harvester, since the harvesting unit in the front portion of the machine body has a large lateral width (left-right width), if a plurality of crop sensors are provided in the harvesting unit as in the present invention, it is possible to detect a harvesting width corresponding to a group of crops harvested by an actually performed harvesting operation among the operable widths in which the harvesting unit can perform the harvesting operation, based on which crop sensor is detecting the crop.

For example, if the harvesting width is large, it can be determined that there are many crops introduced into the harvesting unit, and if the harvesting width is small, it can be determined that there are few crops introduced into the harvesting unit.

According to the present invention, it is possible to detect to which part of the harvesting portion a crop is being introduced in the range of the lateral width of the harvesting portion, based on which crop sensor is detecting the crop. For example, it is possible to determine a state in which a crop is being introduced into the right portion of the harvesting unit, a state in which a crop is being introduced into the left and right center portions of the harvesting unit, and the like.

As described above, according to the present invention, it is possible to detect the harvesting width, the part of the harvesting unit to which the crop is being introduced, and the like, and add these detection data to the field work data, thereby improving the accuracy of the field work data of the harvester.

In the present invention, it is preferable that,

a transport unit that transports a crop from the harvesting unit to the machine body side is connected to a rear portion of the harvesting unit, and the harvesting unit includes:

a transverse conveying body which is driven to rotate around a shaft core in the left-right direction so as to convey crops towards an inlet part of the conveying part in the left-right direction of the harvesting part;

a frame body which rotatably supports the lateral conveying body and is connected to the conveying section;

the crop sensor is provided to the frame body.

In some harvesters, a transport unit is connected to the rear part of the harvesting unit, and crops in a field are harvested and collected by the harvesting unit and transported from the transport unit to the machine body. In this case, the harvesting unit includes a frame and a lateral conveying body, and the harvested crops are conveyed in the left-right direction by the lateral conveying body of the harvesting unit, collected at the entrance of the conveying unit, and conveyed toward the machine body by the conveying unit.

Since the harvested crop is conveyed while contacting the transverse conveying body of the harvesting portion, and also contacts the frame body of the harvesting portion, the reliability of the crop detection by the crop sensor can be improved by providing the crop sensor on the frame body of the harvesting portion as in the present invention.

According to the present invention, it is advantageous in terms of simplifying the supporting structure of the crop sensor by providing the crop sensor on the frame body which is the harvesting section of the conventional configuration.

In the present invention, it is preferable that,

the crop sensor is provided in a portion of the frame body located on a lower side of the lateral transfer body.

Since the harvested crops are highly likely to contact the lower portion of the frame body of the harvesting portion, by providing the crop sensor at the portion of the frame body of the harvesting portion located on the lower side of the lateral conveying body as in the present invention, the reliability of the crop detection by the crop sensor can be further improved.

In the present invention, it is preferable that,

the crop sensor is arranged at the bottom of the frame body.

In a state where the possibility that the harvested crop comes into contact with the lower portion of the frame body of the harvesting portion is high, by providing the crop sensor at the bottom of the frame body of the harvesting portion as in the present invention, the reliability of the crop detection by the crop sensor can be further improved.

In the present invention, it is preferable that,

the crop sensor is disposed at a position on the outer peripheral side of the rotation locus of the lateral transport body.

According to the present invention, since the traverse transport body of the harvesting unit does not interfere with the crop sensor even when rotationally driven, damage to the crop sensor and damage to the traverse transport body of the harvesting unit can be easily avoided.

In the present invention, it is preferable that,

an opening portion is formed in the frame body,

the detection part of the crop sensor is provided in a state of protruding from the opening, and is configured to swing in contact with a crop.

Some contact type sensors include a main body and a detection unit swingably supported by the main body.

According to the present invention, the detection portion of the crop sensor is projected from the opening portion of the frame body, and the crop is detected by the detection portion of the crop sensor, whereby the main body portion of the crop sensor can be protected by the frame body, which is advantageous in terms of durability of the crop sensor.

In the present invention, it is preferable that,

the harvester is provided with a gap filling member for filling a gap between the detection part and the opening part.

In the case where the detection portion of the crop sensor is swung in a state of protruding from the opening portion of the frame body, according to the present invention, the gap between the detection portion of the crop sensor and the opening portion of the frame body is filled with the gap filling member, so that a state in which the crop is leaked through the gap can be suppressed.

In the present invention, it is preferable that,

the detection unit includes a wall portion extending downward at an outer peripheral portion of a portion protruding from the opening, and the portion protruding from the opening of the detection unit is formed in a box shape by the wall portion.

According to the present invention, in the crop sensor, the portion of the detection portion protruding from the opening is formed in a box shape, and thus the strength of the detection portion of the crop sensor can be improved.

In the case where the detection portion of the crop sensor protrudes from the opening portion of the frame body, according to the present invention, even if a gap is generated between the detection portion of the crop sensor and the opening portion of the frame body, the gap is narrowed by the wall portion, and therefore, a state in which the crop leaks through the gap can be suppressed.

In the present invention, it is preferable that,

the detection unit includes: an upper stopper that determines a swing limit of an upper side of the detection unit by hitting the frame body; and a lower stopper portion that determines a lower swing limit of the detection portion by hitting the frame body.

According to the present invention, even if the crop introduced into the harvesting section touches the detection part of the crop sensor, the detection part of the crop sensor is stopped by the upper stopper part and the lower stopper part at the upper and lower swing limits even if the crop wants to swing the detection part of the crop sensor more than necessary, so that it is possible to avoid the breakage of the crop sensor due to the swing more than necessary.

In the present invention, it is preferable that,

a transport unit for transporting the crop from the harvesting unit to the body side is connected to a rear portion of the harvesting unit, and the crop sensors are disposed at a right position and a left position in the harvesting unit so as to be distributed based on a left-right center of an inlet portion of the transport unit.

In some harvesters, a transport unit is connected to the rear part of the harvesting unit, and crops in a field are harvested and collected by the harvesting unit and transported from the transport unit to the machine body.

According to the present invention, since the crop sensor is disposed in the harvesting section in a wide range in the left-right direction of the harvesting section with respect to the left-right center of the inlet portion of the conveying section, it is possible to appropriately detect the harvesting width, the state of the crop being introduced into which portion of the harvesting section, and the like.

In the present invention, it is preferable that,

the crop sensor is provided in the harvesting section at a position on the right side with respect to the inlet section, at a position on the left side with respect to the inlet section, and at a position on the front side of the inlet section.

According to the present invention, in the harvesting unit, the crop sensor is provided at a position on the front side of the inlet portion of the conveying unit in addition to a position on the right side and a position on the left side with respect to the inlet portion of the conveying unit, and the crop sensor is disposed in a wide range in the left-right direction of the harvesting unit, so that it is possible to appropriately detect the harvesting width, a state of the crop being introduced into which portion of the harvesting unit, and the like.

In the present invention, it is preferable that,

the crop sensor disposed on the front side of the inlet in the harvesting section is disposed further toward the front side than the crop sensor disposed on the right side and the left side of the harvesting section with respect to the inlet.

When the harvested crops are transported in the left-right direction by the lateral transport body of the harvesting unit, gathered at the entrance of the transport unit, and transported toward the machine body by the transport unit, the crops are gathered at the front portion of the entrance of the transport unit.

According to the present invention, the crop sensor provided on the front side of the inlet portion of the guide portion is disposed in a state slightly separated from the front side of the inlet portion of the conveying portion.

Thus, even if the crop is concentrated on the front portion of the inlet portion of the conveying portion, the crop does not stay by the crop sensor and further the crop is jammed, and the crop is smoothly collected on the inlet portion of the conveying portion and conveyed to the machine body side by the conveying portion.

In the present invention, it is preferable that,

the crop sensor provided at a right side position and a left side position with respect to the inlet portion in the harvesting portion includes a detection portion that contacts the crop and swings around an axis in the front-rear direction.

As the crop sensor, there is a crop sensor including a detection portion that contacts the crop, and when the crop contacts the detection portion, the detection portion swings due to the crop to detect the presence of the crop.

In the case where the harvested crop is transported in the left-right direction by the lateral transport body of the harvesting portion, according to the present invention, the detection portion of the crop sensor, which is disposed at the right side position and the left side position with respect to the inlet portion of the transport portion, swings in the left-right direction about the axis in the front-rear direction.

Thus, the detecting part of the crop sensor is in a state of swinging along the conveying flow of the crop, the detecting part of the crop sensor does not obstruct the conveying of the crop, and the crop is not retained or blocked by the detecting part of the crop sensor.

In the present invention, it is preferable that,

the crop sensor provided in the harvesting unit on the front side of the inlet includes a detection unit that contacts the crop and swings around an axis in the left-right direction.

The crop harvested at the front portion of the entrance of the conveying portion in the harvesting portion is conveyed to the rear side as it is and reaches the entrance of the conveying portion.

According to the present invention, the detection portion of the crop sensor provided in front of the inlet portion of the conveying portion swings back and forth about the axis in the left-right direction.

Thus, the detecting part of the crop sensor is in a state of swinging along the conveying flow of the crop, the detecting part of the crop sensor does not obstruct the conveying of the crop, and the crop is not retained or blocked by the detecting part of the crop sensor.

A harvester according to an embodiment of the present invention includes:

a harvesting part which is arranged at the front part of the machine body and harvests crops in a field;

a harvesting width detection unit that detects a harvesting width corresponding to a group of crops harvested by an actually performed harvesting operation among the operable widths in which the harvesting operation can be performed by the harvesting unit;

a travel speed change unit that changes a travel speed of the machine body;

and a speed control unit that operates the traveling transmission unit to a low speed side as the harvesting width increases and operates the traveling transmission unit to a high speed side as the harvesting width decreases, based on a detection result of the harvesting width detection unit.

In the case where the harvesting width detection unit as in the present invention is provided, for example, if the harvesting width is large, it can be determined that there are many crops introduced into the harvesting unit, and it can be determined that a large load is applied to a processing device, an engine, and the like that process the harvested crops.

Conversely, if the harvesting width is small, it can be determined that the crop introduced into the harvesting portion is small, and the load applied to the processing device, the engine, and the like can be determined to be small.

According to the present invention, as the harvesting width increases, the travel speed of the machine body is automatically operated to the low speed side, so that the increase of the crop introduced into the harvesting unit is suppressed, and the increase of the load applied to the processing device, the engine, and the like is suppressed, so that the harvesting operation can be stably performed.

The smaller the harvesting width is, the more automatically the traveling speed of the machine body is operated to the high speed side, so that the reduction of the crop introduced into the harvesting part is suppressed, and the processing device, the engine, and the like are operated efficiently.

As described above, according to the present invention, the travel speed of the machine body is automatically operated based on the detection result of the harvesting width, so that the processing device, the engine, and the like can be effectively operated while suppressing an increase in load, and the work performance of the harvester can be improved.

In the present invention, it is preferable that,

the harvest width detection unit includes a crop sensor that detects the presence of a crop by contacting the crop,

two or more of the crop sensors are provided in the harvesting unit at a distance in the left-right direction.

In the case where the harvesting width is detected by the harvesting width detection unit, according to the present invention, the harvesting unit is provided with the crop sensor that detects the presence of the crop by contacting the crop, so that the crop introduced into the harvesting unit can be directly detected, and therefore, the accuracy of detecting the harvesting width can be improved.

According to the present invention, since two or more crop sensors are provided in the harvesting unit at intervals in the left-right direction, the presence or absence of a crop can be effectively detected by the crop sensors in a range extending across the right and left portions of the harvesting unit.

In the present invention, it is preferable that,

the harvester is provided with a conveying part which is connected with the rear part of the harvesting part and conveys the harvested crops from the harvesting part to the machine body side,

a harvested crop sensor that comes into contact with the harvested crop to detect the presence of the crop is provided at an inlet portion of the conveying portion.

In some harvesters, a transport unit is connected to the rear part of the harvesting unit, and crops in a field are harvested and collected by the harvesting unit and transported from the transport unit to the machine body.

According to the present invention, since the harvest width detection unit and the harvested product sensor are provided at the inlet of the transport unit, for example, although the harvested product is detected by the harvest width detection unit, if the harvested product sensor is in a state where the harvested product is not detected, it can be determined that an abnormality has occurred in the harvest width detection unit, the harvested product sensor, or the like. In this way, by providing the harvest width detection unit and the harvest sensor at the inlet of the conveyance unit, it is possible to detect an abnormality.

In the present invention, it is preferable that,

the harvested crop sensors are provided at right and left side portions of an inlet portion of the conveying portion.

In the case where the harvester includes the above-described conveying section, the crop introduced from the field to the right of the harvesting section passes mostly through the right portion of the harvesting section and the right side portion of the inlet portion of the conveying section, and the crop introduced from the field to the left of the harvesting section passes mostly through the left portion of the harvesting section and the left side portion of the inlet portion of the conveying section.

According to the present invention, since the harvested product sensors are provided at the right and left portions of the inlet portion of the conveying portion, for example, the harvested product width detection portion detects a crop at the right portion of the harvesting portion, but if the harvested product sensor at the right side is in a state where no crop is detected, it can be determined that an abnormality has occurred in the harvested product width detection portion, the harvested product sensor, or the like. In this way, by providing the harvest width detection unit and the harvested crop sensors on the right and left sides of the inlet of the conveyor unit, various abnormalities can be detected.

In the present invention, it is preferable that,

the harvest width detection unit is provided with a crop sensor for detecting the presence of a crop by contacting the crop,

three or more crop sensors are disposed in the harvesting section at intervals in the left-right direction,

at least one of the crop sensors located at the center side is disposed at the front side of the inlet portion of the harvesting portion.

According to the present invention, in the harvesting unit, the crop sensor is provided at the position on the front side of the inlet portion of the conveying unit in addition to the position on the right side and the position on the left side with respect to the inlet portion of the conveying unit, and the crop sensor is disposed in a wide range in the left-right direction of the harvesting unit, and the presence or absence of a crop can be effectively detected by the crop sensor in a range extending over the right portion and the left portion of the harvesting unit.

Drawings

Fig. 1 is an overall side view of a combine harvester.

Fig. 2 is a cross-sectional plan view of the harvesting section and the conveying section.

Fig. 3 is a vertical cross-sectional side view of the harvesting section and the conveying section.

Fig. 4 is an exploded perspective view showing a support structure of the crop sensor.

Fig. 5 is a diagram showing a grain stalk detection pattern of the crop sensor.

Fig. 6 is a diagram showing a grain stalk detection pattern of the crop sensor.

Fig. 7 is a cross-sectional view of the vicinity of the crop sensor in the first embodiment of embodiment 1.

Fig. 8 is a cross-sectional view of the vicinity of the crop sensor in the second embodiment of embodiment 1.

Fig. 9 is a cross-sectional view of the vicinity of the crop sensor in the third embodiment of embodiment 1.

Fig. 10 is a cross-sectional view of the vicinity of the crop sensor in the third embodiment of embodiment 1.

Fig. 11 is a perspective view of a gap filling member according to a third embodiment of embodiment 1.

Fig. 12 is a front view of a cross section near the crop sensor in the fourth embodiment of embodiment 1.

Fig. 13 is a side view of a crop sensor in the vicinity of the crop sensor in the fourth embodiment of embodiment 1.

Fig. 14 is an exploded perspective view of the vicinity of a crop sensor in the fourth embodiment of embodiment 1.

Fig. 15 is a plan view showing the arrangement of crop sensors according to the fifth embodiment of embodiment 1.

Fig. 16 is a diagram showing a grain and stalk detection pattern of the crop sensor according to the fifth embodiment of embodiment 1.

Fig. 17 is a diagram showing a detection state and a non-detection state of the crop sensor in the seventh embodiment of embodiment 1.

Fig. 18 is a conceptual diagram illustrating a state of association between the control device and each unit in embodiment 2.

Detailed Description

Fig. 1 to 18 show a combine harvester of a full-feed type for rice, which is an example of a harvester.

In fig. 1 to 18, F denotes a "front direction" of the machine body 1, B denotes a "rear direction" of the machine body 1, U denotes an "upper direction" of the machine body 1, and D denotes a "lower direction" of the machine body 1. R represents the "right direction" of the machine body 1, and L represents the "left direction" of the machine body 1.

< integral Structure of combine harvester >

As shown in fig. 1, a machine body 1 as a machine body frame is supported by crawler-type traveling devices 2 on the right and left sides, and a conveying unit 3 is supported on the front portion of the machine body 1 so as to be vertically swingable. The harvesting unit 4 (corresponding to a harvesting unit) is provided, and the transport unit 3 is connected to the rear part of the harvesting unit 4.

As shown in fig. 1, a cab 5 accommodating a cab is supported on the right part of the front part of the machine body 1, a threshing device 6 is supported on the left part of the machine body 1, and a grain tank 7 and a grain discharge device 8 are supported on the right part of the machine body 1.

As shown in fig. 1, as the machine body 1 moves forward, the grain stalks (corresponding to crops) in the field are harvested by the harvesting unit 4, and the harvested grain stalks are supplied from the harvesting unit 4 to the threshing device 6 through the conveying unit 3. In the threshing device 6, the grain stalks are subjected to a threshing process, the collected grains are supplied to the grain tank 7, and the discharged stalks are discharged from the rear portion of the threshing device 6. When the grain tank 7 is filled with grains, the grains in the grain tank 7 are discharged to another transport vehicle (not shown) or the like by the grain discharge device 8.

< control function of combine >

The combine harvester includes a position detection system (not shown) for detecting the position of the machine body 1 and the orientation of the machine body 1, and a grain yield sensor (not shown) for detecting the amount of grain collected by the threshing device 6.

The position detection System is a Satellite Positioning System (GNSS), and a representative System is GPS (Global Positioning System). The harvest-rate sensor continuously detects the weight of the grain recovered per unit time.

The combine harvester has a function of detecting a harvesting width W1 (harvesting width) (see fig. 5 and 6) corresponding to a grain stalk group harvested by actual harvesting work, among the operable widths in which harvesting work can be performed by the harvesting unit 4, by the crop sensors 31, 32, 33, and 34 (see fig. 2), in addition to the position detection system and the harvesting amount sensor described above.

Thus, when one field is divided into a plurality of small regions, the detection values of the harvest amount sensors in the respective regions of the field and the harvest width W1 in the respective regions of the field can be collected and accumulated.

< Structure of harvesting section >

As shown in fig. 1, 2, and 3, the harvesting portion 4 includes a frame 9 serving as a framework, and the frame 9 includes a bottom portion 10, lateral portions 11 connected to the right and left sides of the bottom portion 10, and a rear portion 12 connected to the rear portions of the bottom portion 10 and the lateral portions 11.

As shown in fig. 2 and 3, the front portion (inlet portion 3a) of the conveying portion 3 is connected to the rear portion 12, and the conveying portion 3 is connected to the rear portion of the harvesting portion 4. The conveying unit 3 is connected to the rear of the harvesting unit 4 in a biased manner such that the left and right center CL2 of the inlet 3a of the conveying unit 3 is positioned on the left side of the left and right center CL1 of the harvesting unit 4.

As shown in fig. 2 and 3, a cutter device 13 of a pusher type is supported in the left-right direction on the front portion of the bottom portion 10, and a crop divider 14 is connected to the front portion of the lateral side portion 11. As shown in fig. 1, the right and left arms 15 supported by the rear portion of the frame body 9 extend forward, and the drum 16 is rotatably supported around a left-right axis P1 at the front portion of the arm 15.

As shown in fig. 1, 2, and 3, in the frame body 9, the lateral transfer body 17 is supported on the lateral side portion 11 so as to be rotatable about a left-right axis P2. The lateral transfer member 17 includes a cylindrical body portion 17a, a right spiral portion 17b and a left spiral portion 17c connected to an outer peripheral portion of the body portion 17a, and a bar-shaped raking portion 17 d.

As shown in fig. 2, the right spiral portion 17b of the lateral transfer body 17 is located on the right side of the entrance portion 3a of the transfer portion 3, and the left spiral portion 17c of the lateral transfer body 17 is located on the left side of the entrance portion 3a of the transfer portion 3. The raking portion 17d of the lateral transfer body 17 is located in front of the entrance portion 3a of the transfer portion 3.

As shown in fig. 1, 2, and 3, as the machine body 1 moves forward, the straw between the right and left dividers 14 is raked up by the drum 16 toward the lateral conveying body 17, the roots of the straw are cut by the cutting device 13, and the harvested straw is guided between the lateral conveying body 17 and the bottom 10 by the rotation of the lateral conveying body 17.

As shown in fig. 2, the straw introduced into the vicinity of the right spiral portion 17b of the lateral transfer body 17 is conveyed to the left side by the right spiral portion 17b of the lateral transfer body 17, and is supplied to the inlet portion 3a of the transfer portion 3 by the raking portion 17d of the lateral transfer body 17.

The straw introduced into the vicinity of the left screw portion 17c of the traverse conveyor 17 is conveyed to the right side by the left screw portion 17c of the traverse conveyor 17, and is supplied to the inlet portion 3a of the conveying portion 3 by the raking portion 17d of the traverse conveyor 17.

The straw introduced into the vicinity of the raking portion 17d of the traverse conveyor 17 is conveyed to the rear side by the raking portion 17d of the traverse conveyor 17 and is supplied to the inlet portion 3a of the conveying portion 3.

< Structure of conveying section >

As shown in fig. 1, 2, and 3, the conveying unit 3 includes a square tubular support case 18 supported by the front portion of the machine body 1 so as to be vertically swingably driven, and the front portion of the support case 18 is connected to the rear side portion 12 of the harvesting unit 4.

As shown in fig. 1, 2, and 3, the conveying unit 3 includes a rotating body 19 that is rotationally driven around a left-right axis P3, a conveyor chain 20 that is wound around the right and left sides of the rotating body 19, and a conveyor body 21 attached to the conveyor chain 20, in the support case 18.

As shown in fig. 2 and 3, the driving rotor 19 rotates, and the conveying body 21 moves toward the threshing device 6 along the bottom 18a of the support case 18.

As described in the aforementioned < harvesting unit configuration >, when the grain and straw are supplied from the harvesting unit 4 to the inlet 3a of the conveying unit 3, the grain and straw are conveyed by the conveying body 21 along the bottom 18a of the support case 18 and supplied to the threshing device 6.

As shown in fig. 2 and 3, right and left harvested crop sensors 22 and 23 are provided on right and left sides of the inlet portion 3a of the conveyor 3.

The harvested crop sensors 22 and 23 include arm-shaped detection units 22a and 23a that are swingable back and forth about a left-right axis P4, and are disposed on the left-right center CL2 side of the inlet portion 3a of the conveyor unit 3 with respect to the conveyor chain 20 in a plan view, and the harvested crop sensors 22 and 23 are disposed on the front side of the rotating body 19 in a side view so as not to interfere with the rotation trajectory of the conveyor body 21.

As shown in fig. 2 and 3, the grain and straw are supplied from the harvesting unit 4 to the inlet 3a of the conveying unit 3, and the grain and straw contact the detection units 22a and 23a of the harvested crop sensors 22 and 23, so that the harvested crop sensors 22 and 23 detect the presence of the grain and straw.

< arrangement of crop sensor in reaping part >

As described in the aforementioned < harvesting unit configuration >, four crop sensors 31, 32, 33, and 34 that contact harvested grain stalks between the right and left crop dividers 14 while the grain stalks are harvested and introduced into the harvesting unit 4 and detect the presence of the grain stalks are provided in the harvesting unit 4 as described below.

Among the operable widths at which harvesting work can be performed by the harvesting unit 4, the crop sensors 31 to 34 can detect a harvesting width W1 (harvesting width) (see fig. 5 and 6) (see < crop-straw detection mode > of crop sensor described later) corresponding to a group of crop straws harvested by the harvesting work actually performed.

As shown in fig. 2 and 3, crop sensors 31 and 32 are provided on the bottom 10 of the frame body 9 on the front side of the right spiral portion 17b of the lateral conveyance body 17 (corresponding to a position on the right side of the harvesting portion 4 (harvesting portion) with respect to the entrance portion 3a of the conveyance portion 3).

A crop sensor 34 is provided on the front side of the left screw portion 17c of the lateral conveying body 17 (corresponding to a position on the left side of the harvesting portion 4 (harvesting portion) with respect to the inlet portion 3a of the conveying portion 3).

A crop sensor 33 is provided on the front side of the raking portion 17d of the traverse conveyor 17 (corresponding to the position of the harvesting portion 4 (harvesting portion) on the front side of the inlet portion 3a of the conveyor 3).

Thus, as shown in fig. 2 and 3, the crop sensors 31 to 34 are disposed in the harvesting section 4 (harvesting section) at a left-right interval, and the crop sensors 31 to 34 are disposed in the harvesting section 4 (harvesting section) at positions on the right side and the left side based on the left-right center CL2 of the inlet portion 3a of the conveying section 3, and are disposed in the frame body 9 at a portion below the lateral conveying body 17.

As shown in fig. 2, the crop sensors 31 and 32 overlap the rotation locus of the right spiral portion 17b of the lateral transfer body 17 in a plan view, and the crop sensor 34 overlaps the rotation locus of the left spiral portion 17c of the lateral transfer body 17 in a plan view.

As shown in fig. 3, the crop sensors 31, 32, and 34 are disposed on the front side (outer peripheral side) of the rotation tracks of the right spiral portion 17b and the left spiral portion 17c of the lateral transfer body 17 in a side view, and do not interfere with the right spiral portion 17b and the left spiral portion 17c of the lateral transfer body 17.

As shown in fig. 2, since the crop sensors 31, 32, 34 and the raking part 17d of the lateral transfer body 17 are positioned differently in the left-right direction, the crop sensors 31, 32, 34 do not interfere with the raking part 17d of the lateral transfer body 17.

As shown in fig. 2 and 3, the crop sensor 33 (corresponding to the crop sensor disposed on the front side of the inlet portion 3a of the transporting portion 3 in the harvesting portion 4 (harvesting portion)) is disposed on the front side of the crop sensors 31, 32, and 34 (corresponding to the crop sensors disposed on the right side and the left side of the inlet portion 3a of the transporting portion 3 in the harvesting portion 4 (harvesting portion)).

As shown in fig. 2 and 3, the crop sensor 33 is disposed on the front side (outer peripheral side) of the rotation locus of the raking section 17d of the lateral conveying body 17 and is disposed slightly to the right side (the crop sensors 31 and 32 side) from the left and right center CL2 of the inlet section 3a of the conveying section 3 (the left and right center CL1 side of the harvesting section 4) in plan view.

As shown in fig. 2, since the crop sensor 33 and the right and left spiral parts 17b and 17c of the traverse conveyance body 17 are positioned differently in the left-right direction, the crop sensor 33 does not interfere with the right and left spiral parts 17b and 17c of the traverse conveyance body 17.

< construction of crop sensor >

As shown in fig. 4, the crop sensors 31 to 34 include a main body 24 and a detection unit 25 supported to be swingable around an axis P5 of the main body 24. The detection unit 25 is in the form of an arm extending from the main body 24, and is biased upward (toward the non-detection state) by a spring (not shown) mounted in the main body 24.

As shown in fig. 4, the frame body 9 has an opening 10a formed in the bottom portion 10, and a gap filling member 26 such as a soft rubber plate and a pressing plate 27 are provided. A T-shaped slit 26a is formed in the gap filling member 26, and an opening 27a is formed in the pressing plate 27.

As shown in fig. 4, the gap filling member 26 abuts against the lower surface of the bottom portion 10 in such a manner that the slit 26a of the gap filling member 26 is located at the opening portion 10a of the bottom portion 10. The pressing plate 27 abuts against the lower surface of the gap filling member 26 so that the opening 27a of the pressing plate 27 is positioned in the slit 26a of the gap filling member 26 and the opening 10a of the bottom portion 10, and the gap filling member 26 is fixed to the lower surface of the bottom portion 10 by the pressing plate 27.

As shown in fig. 4, the main body 24 of the crop sensors 31 to 34 is connected to the lower surface of the pressing plate 27, and the detection parts 25 of the crop sensors 31 to 34 protrude obliquely upward through the opening 27a of the pressing plate 27, the slit 26a of the gap filling member 26, and the opening 10a of the bottom part 10.

The state shown in FIG. 3 is a state where the grain stalks do not contact the detecting parts 25 of the crop sensors 31 to 34, and is a state where the crop sensors 31 to 34 do not detect the grain stalks. In this state, the gap between the detection part 25 of the crop sensor 31 to 34 and the opening 10a of the bottom part 10 is filled with the gap filling member 26, and therefore, the grain does not leak through the opening 10a of the bottom part 10.

When the grain stalks contact the detecting parts 25 of the crop sensors 31 to 34 in the state shown in fig. 3, the detecting parts 25 of the crop sensors 31 to 34 are pushed downward by the grain stalks and swing to enter the slits 26a of the gap filling member 26, and the crop sensors 31 to 34 are in a state of detecting the grain stalks.

When the crop sensors 31 to 34 detect the straw, the detection parts 25 of the crop sensors 31 to 34 are in a state of closing the opening 10a of the bottom part 10, and the detection parts 25 of the crop sensors 31 to 34 are in a state of being substantially flush with the upper surface of the bottom part 10. Thus, the flow of straw is not obstructed by the detection parts 25 of the crop sensors 31 to 34, and the grains do not leak through the opening 10a of the bottom part 10.

As shown in fig. 2 to 4, in the crop sensors 31 and 32, the axial center P5 of the main body portion 24 of the crop sensor 31 or 32 is oriented in the front-rear direction, and the detection portion 25 of the crop sensor 31 or 32 extends obliquely to the left (the left-right center CL1 side of the harvesting portion 4) (the inlet portion 3a side of the conveying portion 3).

As shown in fig. 2 to 4, in the crop sensor 33, the axial center P5 of the main body portion 24 of the crop sensor 33 is oriented in the left-right direction, and the detection portion 25 of the crop sensor 33 extends obliquely upward toward the rear side (toward the inlet portion 3a of the conveying portion 3).

As shown in fig. 2 to 4, in the crop sensor 34, the axis P5 of the main body 24 of the crop sensor 34 is oriented in the front-rear direction, and the detection unit 25 of the crop sensor 34 extends obliquely to the right (the left-right center CL1 side of the harvesting unit 4) (the inlet 3a side of the conveying unit 3).

< detection of straw by crop sensor and harvested crop sensor >

As shown in fig. 2, when the right and left dividers 14 are divided into four areas a1, a2, A3, and a4, the crop sensor 31 corresponds to the area a1, the crop sensor 32 corresponds to the area a2, the crop sensor 33 corresponds to the area A3, and the crop sensor 34 corresponds to the area a 4.

As shown in fig. 2, when the grain and straw are introduced from the area a1, the grain and straw are conveyed to the left side by the right spiral portion 17b of the lateral conveyor 17 and supplied to the inlet portion 3a of the conveying portion 3 by the raking portion 17d of the lateral conveyor 17, and the grain and straw contact the crop sensor 31, and the crop sensor 31 detects the grain and straw. In this case, the grain stalks contact the crop sensor 32 after contacting the crop sensor 31, and therefore the crop sensor 32 also detects the grain stalks.

As shown in fig. 2, when the grain and straw are introduced from the area a2, the grain and straw are conveyed to the left side by the right spiral portion 17b of the lateral conveyor 17 and supplied to the inlet portion 3a of the conveying portion 3 by the raking portion 17d of the lateral conveyor 17, the grain and straw contact the crop sensor 32, and the crop sensor 32 detects the grain and straw.

As shown in fig. 2, when the grain and straw are introduced from the area a3, the grain and straw are conveyed to the rear side by the raking portion 17d of the lateral conveying body 17, and contact the crop sensor 33, and are supplied to the inlet portion 3a of the conveying portion 3, and the crop sensor 33 detects the grain and straw.

As shown in fig. 2, when the grain and straw are introduced from the area a4, the grain and straw are conveyed to the right side by the left spiral portion 17c of the lateral conveyor 17 and supplied to the inlet portion 3a of the conveying portion 3 by the raking portion 17d of the lateral conveyor 17, and the grain and straw contact the crop sensor 34, and the crop sensor 34 detects the grain and straw.

As shown in fig. 2, since the crop sensors 31, 32, and 34 overlap the rotation trajectories of the right screw 17b and the left screw 17c of the lateral conveyance body 17 in a plan view, the crop stalks are pressed against the crop sensors 31, 32, and 34 by the rotation of the right screw 17b and the left screw 17c of the lateral conveyance body 17, and the crop sensors 31, 32, and 34 have high reliability in detecting the crop stalks.

Similarly, as shown in fig. 2, since the crop sensor 33 is located slightly on the lateral side of the rotation trajectory of the raking portion 17d of the lateral transfer body 17 in plan view, the crop straw is pressed against the crop sensor 33 by the rotation of the raking portion 17d of the lateral transfer body 17, and the crop sensor 33 has high reliability in detecting the crop straw.

As shown in fig. 2 and 3, when the grain stalks introduced from the areas a1, a2, and a4 are conveyed to the left (right) side by the right spiral portion 17b (left spiral portion 17c) of the lateral conveyor 17, the grain stalks do not contact the crop sensor 33 because the crop sensor 33 is positioned on the front side of the crop sensors 31, 32, and 34, and the crop sensor 33 does not detect the grain stalks.

As shown in fig. 2 and 3, when the grain stalks are introduced from the areas a1 and a2 in the right and left harvested-crop sensors 22 and 23, the right harvested-crop sensor 22 is in a state of detecting the grain stalks, and the left harvested-crop sensor 23 is in a state of detecting the grain stalks or is not in a state of detecting the grain stalks.

When the grain stalks are introduced from the area a3, at least one of the right and left harvested crop sensors 22 and 23 is in a state of detecting the grain stalks.

When the grain and straw are introduced from the area a4, the right sensor 22 for harvested crops is in a state of detecting the grain and straw or in a state of not detecting the grain and straw, and the left sensor 23 for harvested crops is in a state of detecting the grain and straw.

< cereal stalk detection mode of crop sensor >

The following describes the straw detection patterns B1 to B9 of the crop sensors 31 to 34 and the harvested crop sensors 22 and 23, and the harvesting width W1, which is the right-left width of the straw introduced from the field to the harvesting unit 4.

As shown in the detection mode B1 of fig. 5, when the crop sensors 31 to 34 are in the detection state ON and the right and left harvested crop sensors 22 and 23 are in the detection state ON, it can be determined that the harvesting width W1 is in the state of crossing regions a1 to a 4. In this case, if the harvested crop sensors 22 and 23 on the right or left side are in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B2 of fig. 5, when the crop sensors 31 to 33 are in the detection state ON, the crop sensor 34 is in the non-detection state OFF, the right-hand harvested crop sensor 22 is in the detection state ON, and the left-hand harvested crop sensor 23 is in the detection state ON or in the non-detection state OFF, it can be determined that the harvesting width W1 is in the state of the cross regions a1 to A3. In this case, if the right harvested crop sensor 22 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B3 of fig. 5, when the crop sensor 31 is in the non-detection state OFF, the crop sensors 32 to 34 are in the detection state ON, and the right and left harvested crop sensors 22 and 23 are in the detection state ON, it can be determined that the harvesting width W1 is in the state of crossing regions a2 to a 4. In this case, if the harvested crop sensors 22 and 23 on the right or left side are in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B4 of fig. 5, when the crop sensors 31 and 32 are in the detection state ON, the crop sensors 33 and 34 are in the non-detection state OFF, the right-hand harvested crop sensor 22 is in the detection state ON, and the left-hand harvested crop sensor 23 is in the detection state ON or in the non-detection state OFF, it can be determined that the harvesting width W1 is in the state of the cross regions a1 and a 2. In this case, if the right harvested crop sensor 22 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B5 of fig. 5, when the crop sensors 31 and 34 are in the non-detection state OFF, the crop sensors 32 and 33 are in the detection state ON, the right-hand harvested crop sensor 22 is in the detection state ON, and the left-hand harvested crop sensor 23 is in the detection state ON or in the non-detection state OFF, it can be determined that the harvesting width W1 is in the state of the cross regions a2 and A3. In this case, if the right harvested crop sensor 22 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B6 of fig. 5, when the crop sensors 31 and 32 are in the non-detection state OFF, the crop sensors 33 and 34 are in the detection state ON, the right-hand harvested crop sensor 22 is in the detection state ON or in the non-detection state OFF, and the left-hand harvested crop sensor 23 is in the detection state ON, it can be determined that the harvesting width W1 is in the state of the cross regions A3 and a 4. In this case, if the left harvested crop sensor 23 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B7 of fig. 6, when the crop sensors 31, 33, and 34 are in the non-detection state OFF, the crop sensor 32 is in the detection state ON, the right-hand harvested crop sensor 22 is in the detection state ON, and the left-hand harvested crop sensor 23 is in the detection state ON or in the non-detection state OFF, it can be determined that the harvesting width W1 is in the area a2 state. In this case, if the right harvested crop sensor 22 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B8 of fig. 6, when the crop sensors 31, 32, and 34 are in the non-detection state OFF, the crop sensor 33 is in the detection state ON, the right-hand harvested crop sensor 22 is in the detection state ON or in the non-detection state OFF, and the left-hand harvested crop sensor 23 is in the detection state ON or in the non-detection state OFF, it can be determined that the harvesting width W1 is in the state of the area A3. In this case, if both the right and left harvested crop sensors 22 and 23 are in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B9 of fig. 6, when the crop sensors 31 to 33 are in the non-detection state OFF, the crop sensor 34 is in the detection state ON, the right-hand harvested crop sensor 22 is in the detection state ON or in the non-detection state OFF, and the left-hand harvested crop sensor 23 is in the detection state ON, it can be determined that the harvesting width W1 is in the state of the area a 4. In this case, if the left harvested crop sensor 23 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

[ embodiment 1]

Hereinafter, various configuration examples of the crop sensor will be described as embodiment 1.

[ first embodiment of embodiment 1]

The structure related to the crop sensors 31 to 34 may be configured as shown in fig. 7.

As shown in fig. 7, the slit 26a of the gap filling member 26 is eliminated, and the opening 26b and the bellows 26c are provided in the gap filling member 26.

As shown in fig. 7, the detection parts 25 of the crop sensors 31 to 34 protrude upward through the openings 26b of the gap filling member 26, and the space between the lower sides of the detection parts 25 of the crop sensors 31 to 34 and the opening 10a of the bottom part 10 is covered with the bellows 26c of the gap filling member 26. The detection parts 25 of the crop sensors 31 to 34 swing downward as the grain and straw come into contact with each other, and the bellows part 26c of the gap filling member 26 is compressed.

[ second mode of embodiment 1]

The structure related to the crop sensors 31 to 34 may be configured as shown in fig. 8.

The gap filling member 26 shown in fig. 4 and 7 is eliminated, and as shown in fig. 8, a gap filling member 28 made of metal or hard rubber is connected to the detection portion 25 of the crop sensors 31 to 34.

As shown in FIG. 8, in a state where the crop sensors 31 to 34 do not detect the grain and stalk, the detection parts 25 of the crop sensors 31 to 34 protrude upward through the opening 10a of the bottom part 10. At this time, the gap filling member 28 is located above the detection portions 25 of the crop sensors 31 to 34, and the opening 10a of the bottom portion 10 is filled with the gap filling member 28.

As shown in fig. 8, when the detection parts 25 of the crop sensors 31 to 34 swing downward due to contact with the grain and straw, the gap filling members 28 are separated downward from the openings 10a of the bottom part 10. At this time, the front ends of the detection parts 25 of the crop sensors 31 to 34 are abutted against the bottom part 10, and the opening 10a of the bottom part 10 is filled with the detection parts 25 of the crop sensors 31 to 34.

[ third embodiment of embodiment 1]

The structure of the crop sensors 31 to 34 may be configured as shown in fig. 9, 10, and 11.

The gap filling member 26 shown in fig. 4 and 7 is eliminated, and gap filling members 29 and 30 such as a soft rubber plate different from the gap filling member 26 are provided as shown in fig. 11.

As shown in fig. 11, the gap filling member 29 is formed with a slit 29a having a channel shape in a plan view, and a cover portion 29b which is vertically movable is formed. The gap filling member 30 has an opening 30a, two slits 30b formed from the opening 30a, and a cover 30c that can move up and down.

As shown in fig. 9 and 11, the gap filling member 29 is disposed on the upper side, the gap filling member 30 is disposed on the lower side, and the gap filling members 29 and 30 are fixed to the lower surface of the bottom portion 10 by the pressing plate 27.

As shown in fig. 9 and 11, the detecting portions 25 of the crop sensors 31 to 34 protrude upward through the opening portions 30a of the gap filling members 30, and the cover portions 29b of the gap filling members 29 are pushed upward in a state where the crop sensors 31 to 34 do not detect the grain and straw.

As shown in fig. 9 and 11, the opening 30a of the gap filling member 30 is covered with the cover 29b of the gap filling member 29, and the opening formed in the gap filling member 29 by pushing up the cover 29b of the gap filling member 29 is filled with the cover 30c of the gap filling member 30.

As shown in fig. 10 and 11, when the detection parts 25 of the crop sensors 31 to 34 swing downward due to contact with the grain and straw, the detection parts 25 of the crop sensors 31 to 34 press down the cover parts 30c of the gap filling members 30, and the cover parts 29b of the gap filling members 29 move downward so as to follow the detection parts 25 of the crop sensors 31 to 34.

As shown in fig. 10 and 11, the cover portion 30c of the gap filling member 30 is pressed down, and the opening portion from the opening portion 30a of the gap filling member 30 to the cover portion 30c is covered with the detection portion 25 of the crop sensor 31 to 34 and the cover portion 29b of the gap filling member 29.

[ fourth embodiment of embodiment 1]

The structure related to the crop sensors 31 to 34 may be configured as shown in fig. 12, 13, and 14.

The following describes the structure of the crop sensors 31 to 34.

The detection portion 25 of the crop sensors 31 to 34 includes an upper portion 25a, three wall portions 25b, 25c, and 25d extending downward from the outer peripheral portion of the upper portion 25a, an upper stopper portion 25e extending from the lower portion of the wall portion 25b to the lateral side surface, a lower stopper portion 25f extending from the lower portions of the wall portions 25b and 25c to the lateral side surface, and a middle wall portion 25g fixed downward to the middle portion of the upper portion 25 a.

The detection portion 25 of the crop sensors 31 to 34 is formed by bending a plate material, and is formed in a box shape having a rectangular shape in a plan view and an open lower side by the upper portion 25a and the wall portions 25b, 25c, and 25d (corresponding to a state in which a portion of the detection portion 25 protruding from the opening 10a is formed in a box shape by the wall portions 25b, 25c, and 25 d).

The detection shaft 24a of the main body 24 is inserted into an opening (not shown) formed in the wall portion 25b and the middle wall portion 25g of the detection portion 25 of the crop sensor 31 to 34, and the detection portion 25 is connected to the detection shaft 24a of the main body 24. The detection shaft 24a of the main body 24 of the crop sensor 31 to 34 rotates, so that the detection unit 25 is supported to be swingable around the shaft center P5 of the main body 24, and the detection unit 25 is biased upward (toward the non-detection state) by a spring (not shown) mounted in the main body 24.

A gap filling member 35 such as a soft rubber plate and a pressing plate 36 are provided. The gap filling member 35 has a rectangular opening 35a, and one and the other of the short side portions of the opening 35a have a long extended protrusion 35b and a short extended protrusion 35 c.

The pressing plate 36 is formed of a metal plate material, and has a rectangular opening 36 a. The pressing plate 36 includes a receiving portion 36b bent in a U shape, and the receiving portion 36b is connected to the vicinity of an end portion of the opening portion 36 a.

The gap filling member 35 abuts against the lower surface of the bottom portion 10 so that the opening portion 35a of the gap filling member 35 is positioned at the opening portion 10a of the bottom portion 10.

The pressing plate 36 abuts against the lower surface of the gap filling member 35 such that the opening 36a of the pressing plate 36 is positioned in the opening 35a of the gap filling member 35 and the opening 10a of the bottom portion 10, and the receiving portion 36b of the pressing plate 36 is positioned below the extending protrusion 35b of the gap filling member 35.

The pressing plate 36 is connected to the bottom portion 10 by bolts 37, and the gap filling member 35 is sandwiched between the bottom portion 10 and the pressing plate 36 and fixed to the lower surface of the bottom portion 10 by the pressing plate 36.

The main bodies 24 of the crop sensors 31 to 34 are connected to the lower surface of the pressing plate 36 by bolts 37 in a commonly fastened state, and the detection portions 25 of the crop sensors 31 to 34 protrude obliquely upward through the opening portion 36a of the pressing plate 36, the opening portion 35a of the gap filling member 35, and the opening portion 10a of the bottom portion 10.

The detection of the grain stalks by the crop sensors 31 to 34 will be described below.

The state shown in fig. 12 and 13 is a state where the grain stalks do not contact the detecting parts 25 of the crop sensors 31 to 34, and is a state where the crop sensors 31 to 34 do not detect the grain stalks.

In this state, the upper stopper portions 25e of the detection portions 25 of the crop sensors 31 to 34 are in a state of being abutted against the edge of the opening portion 36a of the pressing plate 36 from below and being abutted against the frame body 9 via the pressing plate 36. This state is a state in which the detection parts 25 of the crop sensors 31 to 34 are positioned at the upper swing limit, and is a state in which they cannot swing further upward.

In this state, the extending protrusion 35b of the gap filling member 35 contacts the wall 25d of the detecting portion 25 of the crop sensors 31 to 34, the extending protrusion 35c of the gap filling member 35 contacts the upper side 25a of the detecting portion 25 of the crop sensors 31 to 34, and the long side portion of the opening 35a of the gap filling member 35 contacts the wall 25b, 25c of the detecting portion 25 of the crop sensors 31 to 34.

Thus, the gaps between the detection parts 25 of the crop sensors 31 to 34 and the opening 10a of the bottom part 10 are filled with the walls 25b, 25c, and 25d of the detection parts 25 of the crop sensors 31 to 34 and the gap filling member 35, and grains do not leak through the opening 10a of the bottom part 10.

In the state shown in fig. 12 and 13, when the grain stalks contact the detecting parts 25 of the crop sensors 31 to 34, the detecting parts 25 of the crop sensors 31 to 34 are pushed downward by the grain stalks and swing to enter the openings 35a of the gap filling member 26, and the crop sensors 31 to 34 are in a state of detecting the grain stalks.

When the detection parts 25 of the crop sensors 31 to 34 swing downward, if the lower stopper parts 25f of the detection parts 25 and the lower edge parts of the wall parts 25b and 25c of the crop sensors 31 to 34 hit the receiving parts 36b of the pressing plate 36 from above, the detection parts 25 of the crop sensors 31 to 34 reach the swing limit from below.

In this state, the lower stopper portions 25f of the detection portions 25 of the crop sensors 31 to 34 are in a state of being abutted against the frame body 9 via the pressing plate 36 (receiving portion 36b), and are in a state of being unable to swing further downward.

When the detection parts 25 of the crop sensors 31 to 34 reach the lower swing limit, the detection parts 25 of the crop sensors 31 to 34 are in a state of closing the opening 35a of the gap filling member 35 and the opening 10a of the bottom part 10, and the upper parts 25a of the detection parts 25 of the crop sensors 31 to 34 and the upper surface of the bottom part 10 are in a substantially coplanar state.

Thus, the flow of straw is not obstructed by the detection parts 25 of the crop sensors 31 to 34, and the grains do not leak through the opening 10a of the bottom part 10.

[ fifth mode of embodiment 1]

In the crop sensors 31 to 34 shown in fig. 4 and [ first another embodiment of embodiment 1] to [ fourth embodiment of embodiment 1], the crop sensors 31 to 34 may be arranged as shown in fig. 15.

As shown in fig. 15, two crop sensors 31 and 32 are provided in the harvesting section 4.

In the bottom portion 10 of the frame body 9, a crop sensor 31 is provided on the front side of the right-handed portion 17b of the lateral conveyance body 17 (corresponding to a position on the right side of the harvesting portion 4 (harvesting portion) with respect to the entrance portion 3a of the conveyance portion 3).

In the bottom portion 10 of the frame body 9, a crop sensor 32 is provided on the front side of the left screw portion 17c of the lateral conveyance body 17 (corresponding to a position on the left side of the harvesting portion 4 (harvesting portion) with respect to the entrance portion 3a of the conveyance portion 3).

Thus, the crop sensors 31 and 32 are disposed in the harvesting section 4 (harvesting section) at a distance in the left-right direction. That is, in the harvesting unit 4 (harvesting unit), the crop sensors 31 and 32 are disposed at positions on the right side and positions on the left side with respect to the left-right center CL2 of the inlet portion 3a of the conveying unit 3. The crop sensors 31 and 32 are provided in the frame body 9 at a portion located below the lateral transfer body 17.

The crop sensor 31 overlaps with the rotation locus of the right screw 17b of the lateral transfer body 17 in a plan view, and the crop sensor 32 overlaps with the rotation locus of the left screw 17c of the lateral transfer body 17 in a plan view.

The crop sensors 31 and 32 are disposed on the front side (outer peripheral side) of the rotation locus of the right spiral portion 17b and the left spiral portion 17c of the lateral transfer body 17 in a side view, and do not interfere with the right spiral portion 17b and the left spiral portion 17c of the lateral transfer body 17. Since the crop sensors 31 and 32 and the raking portion 17d of the lateral transfer body 17 are positioned differently in the left-right direction, the crop sensors 31 and 32 do not interfere with the raking portion 17d of the lateral transfer body 17.

In the crop sensor 31, the axial center P5 of the main body 24 of the crop sensor 31 faces in the front-rear direction, and the detection unit 25 of the crop sensor 31 extends obliquely to the left (the left-right center CL1 side of the harvesting unit 4) (the inlet 3a side of the conveying unit 3).

In the crop sensor 32, the axial center P5 of the main body portion 24 of the crop sensor 32 faces in the front-rear direction, and the detection portion 25 of the crop sensor 32 extends obliquely upward to the right (the right-left center CL1 side of the harvesting unit 4) (the inlet portion 3a side of the conveying unit 3).

The detection of the grain stalks by the crop sensors 31, 32 and the harvested crop sensors 22, 23 will be explained.

As shown in fig. 15, when the space between the right and left dividers 14 is divided into three areas a1, a2, and A3, the crop sensor 31 corresponds to the area a1, the harvested crop sensors 22 and 23 correspond to the area a2, and the crop sensor 32 corresponds to the area A3.

When the grain and straw are introduced from the area a1, the grain and straw are conveyed to the left side by the right screw 17b of the lateral conveyor 17 and supplied to the inlet 3a of the conveying part 3 by the raking part 17d of the lateral conveyor 17, the grain and straw contact the crop sensor 31, and the crop sensor 31 detects the grain and straw.

When the grain and straw are introduced from the area a2, the grain and straw are fed to the inlet 3a of the feeding unit 3 while being fed to the rear side by the raking unit 17d of the lateral feeding body 17, and the grain and straw are detected by the right and left harvested crop sensors 22 and 23.

When the grain and straw are introduced from the region a3, the grain and straw are conveyed to the right side by the left spiral part 17c of the lateral conveyor 17 and supplied to the inlet 3a of the conveying part 3 by the raking part 17d of the lateral conveyor 17, the grain and straw contact the crop sensor 32, and the crop sensor 32 detects the grain and straw.

When the grain stalks are introduced from the area a1 into the right and left sensors 22 and 23, the right sensor 22 detects the grain stalks, and the left sensor 23 detects the grain stalks or does not detect the grain stalks.

When the grain stalks are introduced from the area a2, at least one of the right and left harvested crop sensors 22 and 23 is in a state of detecting the grain stalks.

When the grain and straw are introduced from the area a3, the right sensor 22 for harvested crops is in a state of detecting the grain and straw or in a state of not detecting the grain and straw, and the left sensor 23 for harvested crops is in a state of detecting the grain and straw.

The straw detection mode of the crop sensors 31, 32 and the harvested crop sensors 22, 23 will be explained.

Fig. 16 shows the straw detection patterns B11 to B14 of the crop sensors 31 and 32 and the harvested crop sensors 22 and 23, and the right and left width of the straw introduced from the field into the harvesting unit 4, i.e., the harvesting width W1.

As shown in the detection mode B11, when the crop sensors 31 and 32 are in the detection state ON and the right and left harvested crop sensors 22 and 23 are in the detection state ON, it can be determined that the harvesting width W1 is in the state of crossing regions a1, a2, and A3. In this case, if the harvested crop sensors 22 and 23 on the right or left side are in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B12, when the crop sensor 31 is in the detection state ON, the crop sensor 32 is in the non-detection state OFF, the right-hand harvested crop sensor 22 is in the detection state ON, and the left-hand harvested crop sensor 23 is in the detection state ON or in the non-detection state OFF, it is possible to determine that the harvesting width W1 is in the state of the cross areas a1 and a2 or in the state of the area a 1. In this case, if the right harvested crop sensor 22 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B13, when the crop sensor 31 is in the non-detection state OFF, the crop sensor 32 is in the detection state ON, the right-hand harvested crop sensor 22 is in the detection state ON or in the non-detection state OFF, and the left-hand harvested crop sensor 23 is in the detection state ON, it can be determined that the harvest width W1 is in the state of the cross areas a2 and A3 or in the state of the area A3. In this case, if the left harvested crop sensor 23 is in the non-detection state OFF, it can be determined that an abnormality has occurred.

As shown in the detection mode B14, when the crop sensors 31 and 32 are in the non-detection state OFF and the right and left harvested crop sensors 22 and 23 are in the detection state ON, it can be determined that the harvesting width W1 is in the area a2 state.

[ sixth mode of embodiment 1]

In the above-described [ fifth embodiment 1], a third crop sensor 33 (see the crop sensor 33 in fig. 2) may be provided on the front side of the raking portion 17d of the traverse conveyor 17 (the front side of the inlet portion 3a of the conveyor 3) shown in fig. 15.

According to this structure, in the detection mode B12 of fig. 16, when the crop sensor 33 is in the detection state ON, it can be determined that the harvesting width W1 is in the state of the cross regions a1 and a 2. When the crop sensor 33 is in the non-detection state OFF, it can be determined that the harvesting width W1 is in the region a1 state.

In the detection mode B13 of fig. 16, when the crop sensor 33 is in the detection state ON, it can be determined that the harvesting width W1 is in the state of crossing the regions a2 and A3. When the crop sensor 33 is in the non-detection state OFF, it can be determined that the harvesting width W1 is in the region A3 state.

[ seventh mode of embodiment 1]

The straw detection by the crop sensors 31 to 34 may be configured as follows.

The amount of straw introduced into the reaping portion 4 varies in each portion of the field depending ON the growth state thereof in the field, etc., and it is not always possible to introduce straw into the reaping portion 4 in an amount sufficient to turn the crop sensors 31 to 34 sufficiently ON in the detection state.

Thus, when harvesting is performed by the harvesting unit 4, the grain stalks introduced into the harvesting unit 4 are repeatedly brought into contact with the crop sensors 31 to 34 and are not brought into contact with the crop sensors 31 to 34.

In the above state, as shown in fig. 17, the crop sensors 31 to 34 in the non-detection state OFF repeatedly output detection signals ON1, ON2, ON3, and ON 4.

In this case, even if the output of the detection signals ON2, ON3, and ON4 is stopped when the crop sensors 31 to 34 output the detection signals ON1 from the first detection signal ON until the set time T elapses, it is determined that the crop sensors 31 to 34 are in the detection state ON (see the broken line in fig. 17).

Even if the set time T has elapsed, since the next detection signal ON1 is immediately output from the crop sensors 31 to 34 if harvesting is being performed by the harvesting unit 4, the set time T is set again, and it is determined that the crop sensors 31 to 34 are in the detection state ON.

Thus, even if the grain stalks are repeatedly brought into contact with the crop sensors 31 to 34 and not brought into contact with the crop sensors 31 to 34 in the areas A1 to A4 during harvesting in the harvesting section 4, it is determined that the crop sensors 31 to 34 are in the detection state ON.

The set time T may be set to a constant time (e.g., 1 second, etc.).

The set time T may be changed in conjunction with the traveling speed of the machine body 1.

That is, in consideration of the fact that there is a high possibility that a grain or stalk is present in a section of a certain distance (for example, 2m or the like) from the point where the crop sensors 31 to 34 output the detection signal (the possibility that the crop sensors 31 to 34 output the detection signal), when the machine body 1 travels a certain distance, it is necessary to change the set time T depending on the traveling speed of the machine body 1.

When the set time T is changed in conjunction with the traveling speed of the machine body 1, a speed sensor (not shown) that detects the traveling speed of the machine body 1 is provided, and the set time T may be changed to the short side when the traveling speed of the machine body 1 is high, or the set time T may be changed to the long side when the traveling speed of the machine body 1 is low.

In a combine harvester, the following operations are repeated: when a harvesting stroke is completed along one side of the field and reaches the ridge edge, the harvesting part 4 is stopped and ascends from the field, and turns at the ridge edge to enter the next harvesting stroke.

Thus, the processing shown in fig. 17 is performed in a state where harvesting is performed by the harvesting unit 4, that is, in a state where a harvesting clutch (not shown) for transmitting power to the harvesting unit 4 is turned on.

In a state where the harvesting unit 4 is not harvesting, such as a turning around at a ridge, that is, in a state where the harvesting clutch is disengaged, the processing shown in fig. 17 is not performed, and when the detection signals ON1 to ON4 are stopped from the crop sensors 31 to 34, it is determined that the crop sensors 31 to 34 are in the non-detection state OFF.

[ other modes of embodiment 1]

The crop sensors 31 to 34 shown in fig. 4 and 7 to 11 may be provided with the upper stopper portions 25e and the lower stopper portions 25f of the crop sensors 31 to 34.

[ embodiment 2]

Next, a configuration for controlling the travel speed of the machine body in accordance with the harvesting width in the harvester (combine) according to embodiment 2 will be described. The harvester (combine) of the present embodiment can be implemented together with or independently of the harvester (combine) of embodiment 1.

< Structure relating to detection of harvesting Width and abnormality >

As shown in fig. 18, detection signals of the crop sensors 31 to 34 and the harvested crop sensors 22 and 23 are input to the control device 130, and a harvesting width detection unit 136 (corresponding to a harvesting width detection unit) and an abnormality detection unit 137 are provided as software in the control device 130. The crop sensors 31 to 34 are attached to the harvesting width detection unit 136 and provided in the harvesting width detection unit 136. The display device 39 such as a liquid crystal display is provided in the driver unit.

The harvesting width detection unit 136 detects the harvesting width W1 based on the detection signals of the crop sensors 31 to 34, and the detection result (harvesting width W1) is displayed on the display device 39.

The abnormality detection unit 137 detects an abnormality based on detection signals from the crop sensors 31 to 34 and the harvested crop sensors 22 and 23, and when an abnormality is detected, the detection result is displayed on the display device 39.

< construction of traveling Transmission System >

As shown in fig. 18, power of an engine (not shown) is transmitted to a hydrostatic type continuously variable transmission 128 (corresponding to a traveling transmission unit) and is transmitted from a gear type sub-transmission (not shown) to the traveling devices 2 on the right and left sides. The continuously variable transmission 128 is continuously variable in speed to the neutral position N, the forward direction F, and the reverse direction R.

The continuously variable transmission 128 is operated by the electric motor 129, and the electric motor 129 is operated by the control device 130. The driver part includes a shift lever 135, the shift lever 135 is freely operable to a neutral position N, a forward direction F, and a reverse direction R, and an operation position of the shift lever 135 is input to the control device 130.

The speed control unit 38 is provided as software in the control device 130. The driving unit includes a manual setting unit 40 that can manually set the speed control unit 38 in an operating state and a stopped state, and a signal of the manual setting unit 40 is input to the control device 130.

When the speed control unit 38 is set to the stopped state by the manual setting unit 40, the stopped state of the speed control unit 38 is displayed on the display device 39. When the shift lever 135 is operated to the neutral position N in the stopped state of the speed control unit 38, the electric motor 129 is operated by the control device 130 to operate the continuously variable transmission 128 to the neutral position N. When the shift lever 135 is operated to the forward side F (reverse side R), the electric motor 129 is operated by the control device 130, the continuously variable transmission 128 is operated to the forward side F (reverse side R), and the continuously variable transmission 128 is operated to a shift position corresponding to the operation position of the shift lever 135.

< automatic control of traveling speed of machine body >

As shown in fig. 18, when speed control unit 38 is set to the operating state by manual setting unit 40, the operating state of speed control unit 38 is displayed on display device 39. Based on the detection result (the harvesting width W1) of the harvesting width detection unit 136, the speed control unit 38 operates the electric motor 129 to automatically operate the continuously variable transmission 128.

In the operating state of the speed control unit 38, the continuously variable transmission 128 is automatically operated to the low speed side of the forward direction F by the speed control unit 38 as the harvesting width W1 increases. The smaller the harvesting width W1, the more the speed control unit 38 automatically operates the continuously variable transmission 128 to the high speed side of the advancing side F. The shift position of the continuously variable transmission 128 is displayed on the display device 39.

When the continuously variable transmission 128 is automatically operated to the high speed side by the speed control unit 38 in the operating state of the speed control unit 38, the upper limit position on the high speed side is the operating position of the shift lever 135, and the continuously variable transmission 128 is not operated to the high speed side on the forward side F beyond the shift position corresponding to the operating position of the shift lever 135. Thus, the upper limit position on the high speed side can be arbitrarily changed by operating the shift lever 135.

When the shift lever 135 is operated to the reverse side R in the operating state of the speed control unit 38, the speed control unit 38 is temporarily brought into a stopped state, and the continuously variable transmission 128 is operated to a shift position of the reverse side R corresponding to the operation position of the shift lever 135. Next, when the shift lever 135 is operated to the forward side F, the speed control portion 38 returns to the operating state.

For example, when the harvesting unit 4 is driven into the grain and stalk in the field as in the initial state of the primary harvesting stroke, the state where the harvesting width W1 is not present is suddenly changed to the state where the harvesting width W1 is generated.

When the above-described state occurs in the operating state of the speed control unit 38, the continuously variable transmission 128 is operated at the low speed side of the forward direction F more quickly by the speed control unit 38 than the operation of the continuously variable transmission 128 at the low speed side during harvesting work.

For example, when the harvesting unit 4 is no longer harvesting the grain stalks in the field as in the end state of the primary harvesting stroke, the state where the harvesting width W1 is present suddenly changes to the state where the harvesting width W1 is eliminated, and then the machine body 1 is often turned.

When the above-described state occurs in the operating state of the speed control unit 38, the continuously variable transmission 128 is operated at the high speed side of the forward direction F more slowly by the speed control unit 38 than the operation of the continuously variable transmission 128 at the high speed side during harvesting work.

If the straw in the field falls down or is dense, the driver may not recognize the state of the harvesting unit 4 even if the driver views the harvesting unit 4 ahead from the driving unit. In this case, since the detected harvest width W1 is displayed on the display device 39, the driver can confirm which region a1 to a4 of the harvesting unit 4 the grain stalks are being introduced into by observing the display device 39. This makes it possible to effectively use the harvesting width W1 displayed on the display device 39 in correcting the orientation of the machine body 1 during harvesting work.

[ other modes of embodiment 2]

The continuously variable transmission 128 may be operated by the electric motor 129, and the travel speed of the machine body 1 may be automatically controlled by operating an accelerator (corresponding to a travel transmission portion) of the engine by the electric motor 129 instead of automatically controlling the travel speed of the machine body 1.

When the shift lever 135 and the continuously variable transmission 128 are mechanically connected by a connecting link or the like, the traveling speed of the machine body 1 can be automatically controlled by operating the continuously variable transmission 128 by operating the shift lever 135 with the electric motor 129.

[ other modes of embodiments 1 and 2]

The conveying section 3 may be connected to the rear of the harvesting section 4 in a biased manner so that the left and right center CL2 of the inlet 3a of the conveying section 3 is positioned slightly to the right with respect to the left and right center CL1 of the harvesting section 4.

According to this structure, the arrangement of the right and left screw parts 17b and 17c, the raking part 17d, and the crop sensors 31 to 34 of the traverse body 17 may be reversed from the state shown in fig. 2 and 15.

The conveying unit 3 may be connected to the rear part of the harvesting unit 4 so that the left and right center CL2 of the inlet portion 3a of the conveying unit 3 is located at the left and right center CL1 of the harvesting unit 4, and the right spiral portion 17b and the left spiral portion 17c of the traverse conveyor 17 may have the same length.

According to this structure, the crop sensors 33 may be disposed at the left and right center CL2 of the inlet portion 3a of the conveying unit 3, and the same number of crop sensors 31, 32, 34 may be disposed in front of the right and left spiral portions 17b, 17c of the traverse conveying body 17 so as to be bilaterally symmetrical with respect to the left and right center CL1 of the harvesting unit 4.

Instead of four, five or more crop sensors 31 to 34 may be provided, or three or less may be provided. It is also possible to eliminate the crop sensor 33 located at the front side of the inlet portion 3a of the conveying portion 3.

The frame 9 of the harvesting section 4 may be provided with crop sensors 31 to 34 on the rear side 12 instead of the bottom 10. In this case, the crop sensors 31 to 34 may be provided in a portion of the rear side portion 12 that is lower than the axis P2 of the lateral conveying body 17 (corresponding to a portion of the frame body that is located below the lateral conveying body).

When the crop sensors 31 to 34 are provided on the rear side portion 12, instead of the detection portions 25 of the crop sensors 31 to 34, a pressure receiving surface made of a rubber or the like may be provided, and the crop may be detected by an increase in pressure applied to the pressure receiving surface when the grain and stalk touch the pressure receiving surface.

Instead of providing the right and left harvested crop sensors 22 and 23 at the right and left portions of the inlet portion 3a of the conveyor portion 3, one harvested crop sensor (not shown) may be provided at the bottom portion 18a of the support housing 18 at the inlet portion 3a of the conveyor portion 3. This makes it possible to determine that an abnormality has occurred in the crop sensors 31, 32, 33, and 34 by using one harvested crop sensor.

In this case, the harvested crop sensors (not shown) may be provided at the bottom 18a of the support case 18 at the positions of the left and right center CL2 of the inlet portion 3a of the conveying portion 3, or may be provided at positions slightly to the right or left from the left and right center CL2 of the inlet portion 3a of the conveying portion 3.

Industrial applicability

The invention can be applied to not only a full-feeding type rice combine harvester, but also a semi-feeding type rice combine harvester, a corn harvester, a sugarcane harvester, a cotton harvester and other harvesters.

Description of the reference numerals

1 machine body

3 conveying part

3a inlet part

4 harvesting part

9 frame body

10 bottom

10a opening part

7 transverse conveying body

22. 23 harvested crops sensor

25 detection part

25b, 25c, 25d wall

25e upper stop part

25f lower stop

26. 29, 30, 35 gap filling member

128-travel transmission unit

31. 32, 33, 34 crop sensor

36 harvest width detection part

38 speed control part

Center of CL2

P2 axle center

P5 axle center

Width at harvest of W1