阅读说明：本技术 物料长度检测装置及铆钉机 (Material length detection device and riveting machine ) 是由 周华林 于 2019-11-19 设计创作，主要内容包括：本发明公开一种物料长度检测装置,包括分料结构和感测结构,分料结构安装在竖向设置的用于输送物料的输送通道,其包括沿输送通道上下相距排布的第一分料件和第二分料件,第一分料件和第二分料件可左右横移至横跨输送通道以分隔出一物料并将物料限位在检测位置；感测结构包括沿物料的长度方向依次排布的第一感测件和第二感测件,第一感测件和第二感测件可左右横移以感测位于检测位置的物料,从而根据第一感测件和第二感测件的感测结果得出物料的长度是否符合标准,实现了物料的长度检测,进而可以根据长度检测结果将长度不符合标准的物料剔除。另外,本发明还公开了一种装设有该物料长度检测装置的铆钉机。(The invention discloses a material length detection device, which comprises a material distribution structure and a sensing structure, wherein the material distribution structure is arranged on a vertically arranged conveying channel for conveying materials and comprises a first material distribution piece and a second material distribution piece which are arranged along the conveying channel at intervals up and down, and the first material distribution piece and the second material distribution piece can transversely move left and right to cross the conveying channel so as to separate a material and limit the material at a detection position; the sensing structure comprises a first sensing piece and a second sensing piece which are sequentially arranged along the length direction of the material, the first sensing piece and the second sensing piece can transversely move left and right to sense the material located at the detection position, so that whether the length of the material meets the standard or not is obtained according to the sensing result of the first sensing piece and the second sensing piece, the length detection of the material is realized, and the material with the length not meeting the standard can be removed according to the length detection result. In addition, the invention also discloses a riveting machine provided with the material length detection device.)

1. A material length detection device, characterized by, includes:

the material distributing structure is arranged on a vertically arranged conveying channel for conveying the materials, and comprises a first material distributing part and a second material distributing part which are arranged along the conveying channel at intervals up and down, and the first material distributing part and the second material distributing part can transversely move left and right to cross the conveying channel so as to separate the materials and limit the materials at a detection position;

the sensing structure comprises a first sensing piece and a second sensing piece which are sequentially arranged along the length direction of the material, the first sensing piece and the second sensing piece can transversely move left and right to sense the material positioned at the detection position, and whether the length of the material meets the standard or not is obtained according to sensing results of the first sensing piece and the second sensing piece.

2. The material length detecting device according to claim 1, wherein whether the length of the material meets a standard is determined by whether the first sensing member and the second sensing member are stopped by the material; if the first sensing member is stopped by the material and the second sensing member is not stopped by the material, the length of the material meets the standard, if the first sensing member and the second sensing member are not stopped by the material, the length of the material is too short, and if the first sensing member and the second sensing member are both stopped by the material, the length of the material is too long.

3. The material length detecting apparatus as claimed in claim 2, further comprising a first power member for driving the first and second sensing members to traverse to cancel a stop with the material according to a command of the controller, and a controller.

4. The material length detecting device as claimed in claim 3, further comprising a second power member for driving the material distributing structure and the sensing structure to simultaneously traverse left and right according to the instruction of the controller.

5. The material length detecting device according to claim 3, further comprising an over short material blanking structure, wherein a notch is formed on one side of the conveying channel, and the over short material blanking structure is located at the notch and can enter the conveying channel from the notch to enable the over short material to slide out of the conveying channel along the over short material blanking structure.

6. The material length detecting device as claimed in claim 5, wherein the over short blanking structure moves laterally into or out of the conveying passage with the first and second sensing members.

7. The material length detecting device as claimed in claim 6, wherein the first and second sensing members are disposed on a sliding seat, the over-short blanking structure includes a blocking member and an elastic member, the blocking member is disposed at the gap, the elastic member is disposed between the blocking member and the sliding seat, the sliding seat compresses the elastic member to push the blocking member into the conveying passage when traversing toward the detecting position, and the blocking member exits the conveying passage when the sliding seat decompresses the elastic member.

8. The material length detecting device according to claim 7, wherein the blocking member is formed with an inclined guide surface along which the material can slide down to the accommodating box located below the blocking member.

9. The material length detecting device as claimed in claim 6, wherein the controller controls the first power member to drive the first sensing member and the second sensing member to move laterally when the material meets a standard, the blocking member exits the conveying passage, and the material meeting the standard can slide downward along the conveying passage.

10. The material length detecting device as claimed in claim 9, further comprising a light sensor for detecting the material on the conveying passage in compliance with a standard, wherein the controller controls the material length detecting device to stop operating when the light sensor detects that the material is accumulated to a predetermined height.

11. The material length detecting device according to claim 1, further comprising an alarm device, wherein the alarm device outputs an alarm signal when the length of the material does not meet a standard.

12. The material length detecting device according to claim 2, wherein the first sensing member includes a first probe and a first sensor located at one side of the first probe, the first probe is slidably disposed on a mounting base, and the first probe slides towards the first sensor relative to the mounting base when being stopped by the material, so that whether the first probe is stopped by the material can be determined by whether the first sensor can sense the first probe.

13. The material length detecting device according to claim 12, wherein the second sensing member includes a second probe and a second sensor located at one side of the second probe, the second probe is slidably disposed on the mounting base, and the second probe slides towards the second sensor relative to the mounting base when being stopped by the material, so that whether the second probe is stopped by the material is determined by whether the second sensor can sense the second probe.

14. The material length detecting device as claimed in claim 13, wherein the mounting seat is movable relative to an outer wall of the conveying passage to adjust a distance between the first and second sensing members and the conveying passage.

15. The material length detecting device according to claim 1, wherein the distributing structure includes a body, the body spans inside the conveying channel, the first distributing member and the second distributing member are located outside the conveying channel and are respectively connected to two ends of the body, and the first distributing member and the second distributing member are partially opposite to each other.

16. The material length detecting device according to claim 1, wherein the first distributing member is located above the second distributing member, and an upper end edge of an end portion of the first distributing member near the detecting position is formed into an inclined curved surface so that the first distributing member separates a material.

17. The material length detecting device according to any one of claims 1 to 16, wherein the material is a rivet.

18. A riveting machine, comprising a conveying channel for conveying material and a material length detection device for detecting the length of the material, the material length detection device being as claimed in claim 17.

Technical Field

The invention relates to the technical field of material length detection of processing equipment, in particular to a material length detection device and a riveting machine which are matched with the processing equipment to detect the length of a processed material.

Background

Rivets are commonly used to join and rivet objects, and their length directly affects the riveting effect between the objects. If the length of the rivet is too short, the locking between the objects is not firm, and if the length of the rivet is too long, the appearance of the riveted object is affected, if the rivet with the length not meeting the standard is hit on the object, the defects are further generated, so that not only is the waste of the rivet caused, but also the waste of the riveted object caused by the rivet is generated more importantly. Therefore, the length of the rivet is checked for conformity with the standard on the left of applying the rivet to the object.

Disclosure of Invention

The invention aims to provide a material length detection device which can detect whether the length of a material meets a standard.

Another object of the present invention is to provide a riveting machine capable of detecting whether the length of a rivet meets a standard.

In order to achieve the purpose, the invention discloses a material length detection device which comprises a material distribution structure and a sensing structure, wherein the material distribution structure is arranged on a vertically arranged conveying channel for conveying materials and comprises a first material distribution piece and a second material distribution piece which are arranged along the conveying channel at intervals up and down, and the first material distribution piece and the second material distribution piece can transversely move left and right to cross the conveying channel so as to separate a material and limit the material at a detection position; the sensing structure comprises a first sensing piece and a second sensing piece which are sequentially arranged along the length direction of the material, the first sensing piece and the second sensing piece can transversely move left and right to sense the material positioned at the detection position, and whether the length of the material meets the standard or not is obtained according to sensing results of the first sensing piece and the second sensing piece.

Preferably, whether the length of the material meets the standard is obtained by judging whether the first sensing part and the second sensing part are stopped by the material; if the first sensing piece is stopped by the material and the second sensing piece is not stopped by the material, the length of the material meets the standard, if the first sensing piece and the second sensing piece are not stopped by the material, the length of the material is too short, and if the first sensing piece and the second sensing piece are both stopped by the material, the length of the material is too long.

Preferably, the material length detection device further comprises a first power member and a controller, wherein the first power member is used for driving the first sensing member and the second sensing member to transversely move according to the instruction of the controller so as to cancel the stop with the material.

Preferably, the material length detection device further comprises a second power member, and the second power member is used for driving the material distribution structure and the sensing structure to move transversely left and right simultaneously according to the instruction of the controller.

Preferably, the material length detection device further comprises a too short material blanking structure, a notch is formed in one side of the conveying channel, and the too short material blanking structure is located at the notch and can enter the conveying channel through the notch to enable the too short material to slide out of the conveying channel along the notch.

Preferably, the over-short material blanking structure moves left and right along with the first sensing piece and the second sensing piece to enter the conveying channel or exit the conveying channel.

Preferably, the first sensing member and the second sensing member are located on a sliding seat, the short material blanking structure includes a blocking member and an elastic member, the blocking member is located at the notch, the elastic member is located between the blocking member and the sliding seat, the sliding seat compresses the elastic member when moving transversely towards the detection position to push the blocking member to enter the conveying channel, and the blocking member exits the conveying channel when the sliding seat cancels compression of the elastic member.

Preferably, the blocking member is formed with an inclined guide surface along which the material can slide down to the receptacle below the blocking member.

Preferably, the controller controls the first power member to drive the first sensing member and the second sensing member to move transversely when the material meets the standard, the blocking member exits the conveying passage, and the material meeting the standard can slide downwards along the conveying passage.

Preferably, the material length detection device further comprises an optical sensor, the optical sensor is used for detecting materials on the conveying channel, the materials meet the standard, and the controller controls the material length detection device to stop operating when the optical sensor detects that the material accumulation reaches a preset height.

Preferably, the material length detection device further comprises an alarm device, and the alarm device outputs an alarm signal when the length of the material does not meet the standard.

Preferably, the first sensing member includes a first probe and a first sensor located at one side of the first probe, the first probe is slidably disposed on a mounting base, and the first probe slides towards the first sensor relative to the mounting base when being stopped by the material, so as to determine whether the first probe is stopped by the material by sensing the first probe by the first sensor.

Preferably, the second sensing member includes a second probe and a second sensor located on one side of the second probe, the second probe is slidably disposed on the mounting base, and the second probe slides towards the second sensor relative to the mounting base when being stopped by the material, so as to determine whether the second probe is stopped by the material by sensing the second probe by the second sensor.

Preferably, the mounting seat is movable relative to the outer wall of the conveying channel to adjust the distance between the first sensing member and the second sensing member and the conveying channel.

Preferably, the distributing structure comprises a body, the body stretches across the inner side of the conveying channel, the first distributing part and the second distributing part are located on the outer side of the conveying channel and are respectively connected to two ends of the body, and the first distributing part and the second distributing part are opposite to each other up and down.

Preferably, the first distributing member is located above the second distributing member, and an upper end edge of one end portion of the first distributing member close to the detecting position is an inclined curved surface, so that the first distributing member separates a material.

Preferably, the material is a rivet.

In order to achieve the above object, the present invention also discloses a riveting machine, comprising a conveying channel for conveying material and a material length detecting device for detecting the length of the material, wherein the material length detecting device is as described in the claims.

Compared with the prior art, the material detection device has the advantages that the second material distributing part blocks the lower edge of the material, the first material distributing part separates the material blocked by the second material distributing part from other materials, the material is limited at the detection position by the matching of the first material distributing part and the second material distributing part, the first sensing part and the second sensing part which are sequentially arranged along the length direction of the material sense the material respectively, and therefore whether the length of the material meets the standard or not is obtained according to the sensing result, and the length detection of the material is realized.

Drawings

Fig. 1 is a schematic structural view of a riveting machine in a first state of a material length detection device according to an embodiment of the invention.

Fig. 2 is a schematic structural view of a riveting machine in a second state of the material length detection device according to the embodiment of the invention.

Fig. 3 is a schematic structural view of a riveting machine in a third state of the material length detection device according to the embodiment of the invention.

FIG. 4 is a schematic structural diagram of a riveting machine according to an embodiment of the present invention, wherein the material length meets the standard.

FIG. 5 is a schematic structural diagram of a riveting machine for too short a material length according to an embodiment of the invention.

Fig. 6 is a schematic structural view of a riveting machine when the material length is too long according to an embodiment of the invention.

FIG. 7 is a schematic diagram of a partial structure of a sensing structure according to an embodiment of the invention.

Fig. 8 is a block diagram of a control structure of the material length detection apparatus according to the embodiment of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "lateral", "vertical", "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and thus are not to be construed as limiting the scope of the present invention.

Referring to fig. 1 to 8, the present invention discloses a material length detecting device 100, which is used in cooperation with a processing apparatus 200 to detect whether the length of a material 300 on a conveying channel 210 of the processing apparatus 200 meets a standard, so as to remove the material 300 whose length does not meet the standard. Specifically, the material length detecting device 100 comprises a material distributing structure 1 and a sensing structure 2, wherein the material distributing structure 1 is mounted on a conveying channel 210 and comprises a first material distributing part 11 and a second material distributing part 12 which are arranged along the conveying channel 210 at intervals, the first material distributing part 11 and the second material distributing part 12 extend left and right and can transversely move left and right to cross the conveying channel 210, so that a material 300 'is separated and the material 300' is limited at a detection position; the sensing structure 2 comprises a first sensing member 21 and a second sensing member 22 which are sequentially arranged along the length direction of the material 300 ', and the first sensing member 21 and the second sensing member 22 can transversely move left and right towards the detection position to sense the material 300 ' at the detection position, so that whether the length of the material 300 ' meets the standard or not can be obtained according to the sensing results of the first sensing member 21 and the second sensing member 22.

The structure and operation of the material length detecting apparatus 100 will be described in detail below by taking the processing device 200 as a riveting machine as an example.

Referring to fig. 1 to 6, in the present embodiment, the material 300 is a rivet, the conveying channel 210 is vertically disposed, the head of the rivet 300 is clamped in the conveying channel 210 and sequentially slides in the conveying channel 210 from top to bottom, the material length detecting device 100 having the above structure is installed on the conveying channel 210, and the first distributing member 11 is located on the second distributing member 12. In the present embodiment, when the length of the rivet 300 ' is tested, whether the length of the rivet 300 ' meets the standard is determined by whether the first sensing member 21 and the second sensing member 22 are stopped by the rivet 300 ' when moving to the detection position. Specifically, when the length of the rivet 300 ' meets the standard, the first sensing member 21 will touch the rivet 300 ' and be stopped by the rivet 300 ', and the second sensing member 22 will not touch the rivet 300 ' and can cross the rivet 300 '; when the length of the rivet 300 ' is too short, neither the first sensing member 21 nor the second sensing member 22 may touch the rivet 300 ' and may straddle the rivet 300 '; when the length of the rivet 300 ' is too long, both the first sensing member 21 and the second sensing member 22 touch the rivet 300 ' and are stopped by the rivet 300 '.

Referring to fig. 1 and 8, the material length detecting device 100 further includes a first power member 3, a second power member 4 and a controller 5, the second power member 4 is used for driving the material separating structure 1 and the sensing structure 2 to integrally and simultaneously move left and right, the first power member 3 is used for driving the first sensing member 21 and the second sensing member 22 to move laterally, and when the first sensing member 21 is stopped by the rivet 300 ' and the second sensing member 22 is not stopped by the rivet 300 ' and crosses the rivet 300 ', the controller 5 controls the first power member 3 to drive the first sensing member 21 and the second sensing member 22 to move rightward to release the rivet 300 ', so that the rivet 300 ' can slide downward along the conveying channel 210 until sliding out of the conveying channel 210, thereby realizing the blanking of the standard rivet 300.

Referring to fig. 1, in the present embodiment, the distributing structure 1 includes a body 13, the body 13 spans on the inner side of the conveying channel 210, the first distributing member 11 and the second distributing member 12 are located on the outer side of the body 13 and are respectively connected to the left end and the right end of the body 13, and the first distributing member 11 and the second distributing member 12 are partially opposite to each other.

Hereinafter, the operation of the distributing structure 1 during the length detection of the rivet 300 will be described by taking the first material 11 connected to the right end of the body 13 and the second material 12 connected to the left end of the body 13 as an example.

When the rivet 300 is detected, the second material distributing part 12 is firstly stopped at the lower edge of the rivet 300 'to prevent the rivet 300' from sliding downwards, as shown in fig. 1; then, the controller 5 controls the second power member 4 to drive the material distributing structure 1 and the sensing structure 2 to integrally traverse leftward, and the first material distributing member 11 will move to the conveying channel 210 and be inserted between two rivets 300, 300 'adjacent up and down to separate the rivet 300' located below from other rivets 300, as shown in fig. 2; during the process that the material distributing structure 1 and the sensing structure 2 continue to integrally traverse leftwards, the first sensing member 21 and the second sensing member 22 will move to the detection position, when the length of the rivet 300 'meets the standard, the first sensing member 21 will be stopped by the rivet 300' and the second sensing member 22 will not be stopped by the rivet 300 'and cross over the rivet 300', as shown in fig. 3, at this time, the controller 5 controls the first power member 3 to drive the sensing structure 2 to integrally traverse rightwards to release the rivet 300 ', and the rivet 300' will slide downwards along the conveying channel 210, as shown in fig. 4. In the present embodiment, the upper end edge of the end portion of the first distributing member 11 located on the left side is inclined from right to left from top to bottom. Thereby, the first depilling member 11 is facilitated to separate two adjacent rivets 300, 300'.

Referring to fig. 3, in particular, the material length detecting device 100 further includes a short material blanking structure 6 located below the detecting position, a notch 220 is formed at the right side of the conveying channel 210, and the short material blanking structure 6 is located at the notch 220 and moves into the conveying channel 210 or exits the conveying channel 210 along with the first sensing member 21 and the second sensing member 22. When the length of the rivet 300 ' is too short, neither the first sensing member 21 nor the second sensing member 22 is stopped by the rivet 300 ' to cross the rivet 300 ', as shown in fig. 5; at this time, the controller 5 no longer controls the first power member 3 to drive the first sensing member 21 and the second sensing member 22 to move rightward, the over-short material blanking structure 6 will stay at the conveying channel 210, and the over-short rivet 300' will slide down from the detection position to the over-short material blanking structure 6 and slide out of the conveying channel 210 along the over-short material blanking structure 6. When the length of the rivet 300 'is too long, both the first sensing member 21 and the second sensing member 22 are stopped by the rivet 300', as shown in fig. 6; at this time, the controller 5 does not control the first power member 3 to drive the first sensing member 21 and the second sensing member 22 to move rightwards any more, the rivet 300 ' is clamped in the conveying channel 210 and cannot slide downwards, and at this time, the overlong rivet 300 ' can be taken away by pushing the first sensing member 21 and the second sensing member 22 away manually, so that the rivets 300 ' with overlong length, overlong length and length meeting the standard can be respectively blanked. Further, as shown in fig. 8, the material length detecting device 100 further includes an alarm device 7 in communication connection with the controller 5, and when the length of the rivet 300' is too long or too short, the controller 5 outputs an alarm signal to remind a field worker through the alarm device 7.

Referring to fig. 3, more specifically, the short material blanking structure 6 includes a blocking member 61 located on the left side and an elastic member 62 located on the right side of the blocking member 61, and the blocking member 61 is disposed at the notch 220; the first sensing member 21 and the second sensing member 22 are disposed on a sliding seat 23, the elastic member 62 is disposed on the left side of the sliding seat 23, the sliding seat 23 compresses the elastic member 62 to push the blocking member 61 into the conveying channel 210 when moving leftward under the driving of the first power member 3, and when the sliding seat 23 moves rightward under the driving of the first power member 3, the blocking member 61 moves rightward and exits the conveying channel 210 under the elastic restoring force of the elastic member 62. In the present embodiment, the elastic member 62 is a spring, but it should not be limited thereto.

Referring to fig. 3 and 4, preferably, the blocking member 61 is formed in a triangular shape having a guide surface 611 inclined from the left side to the right side thereof from top to bottom, and a receiving box 63 for collecting rivets 300 having an excessively short length is placed below the blocking member 61, and when the rivets 300 'are blocked by the blocking member 61, the rivets 300' can slide down along the guide surface 611 to the receiving box 63 below. Due to the design of the guiding surface 611, the rivet 300' can slide down to the accommodating box 63, and the rivet 300 with an excessively short length can be accommodated.

Referring to fig. 4, in particular, the material length detecting device 100 further includes an optical sensor 8, the optical sensor 8 is used for detecting the rivets 300 "meeting the standard on the conveying channel 210, and the controller 5 controls the material length detecting device 100 to stop operating when the optical sensor 8 detects that the rivets 300" are accumulated to reach the preset height, so as to prevent the accumulated rivets 300 "from interfering with the operation of the material distributing structure 1 and the sensing structure 2.

Referring to fig. 7, in the present embodiment, the first sensing member 21 includes a first probe 211 and a first sensor 212 located at a right end of the first probe 211, the second sensing member 22 includes a second probe 221 and a second sensor 222 located at a right end of the second probe 221, the first probe 211 and the second probe 221 are slidably disposed on a mounting base 24, and the mounting base 24 is mounted on the sliding base 23. When the first probe 211 is stopped by the rivet 300 ', the first probe 211 slides to the right relative to the mounting seat 24, so that the first sensor 212 can sense the first probe 211 and know that the first probe 211 is stopped by the rivet 300'; when the first probe 211 continues to move laterally without being stopped by the rivet 300 ', the first sensor 212 cannot sense the first probe 211, and thus knows that the first probe 211 is not stopped by the rivet 300'. Similarly, when the second probe 221 is stopped by the rivet 300 ', the second probe 221 slides to the right relative to the mounting seat 24, so that the second sensor 222 can sense the second probe 221, and thus it is known that the second probe 221 is stopped by the rivet 300'; when the second probe 221 continues to move laterally without being stopped by the rivet 300 ', the second sensor 222 cannot sense the second probe 221, and thus knows that the second probe 221 is not stopped by the rivet 300'.

Referring to fig. 1 and 7, further, a fixing seat 25 is further installed on the sliding seat 23, the fixing seat 25 is located at the right side of the installation seat 24, a first spring 26 is installed between the first probe 211 and the fixing seat 25, a second spring (not shown) is installed between the second probe 221 and the fixing seat 25, when the first probe 211 is stopped by the rivet 300 'and moves rightward, the first spring 26 is compressed, so that the first probe 211 is limited in the rightward movement direction by the first spring 26 and the fixing seat 25, and when the second probe 221 is stopped by the rivet 300' and moves rightward, the second spring is compressed, so that the second probe 221 is limited in the rightward movement direction by the second spring and the fixing seat 25.

In this embodiment, the mounting seat 24 is disposed on the sliding seat 23, a T-shaped sliding rail 27 is disposed on the sliding seat 23, scales are disposed on the sliding rail 27, and the mounting seat 24 can slide along the sliding rail 27 relative to the outer wall of the conveying channel 210, so as to adjust the distance between the first sensing member 21 and the second sensing member 22 and the conveying channel 210, so that the material length detecting device 100 of the present invention can be applied to length detection of rivets 300 with various lengths, and has better applicability.

Referring to fig. 7, in detail, the first probe 211 includes a first base portion 2111 having a sheet shape and a first reinforcing portion 2112 formed by an upper side of the first base portion 2111 protruding outward, the first base portion 2111 protrudes leftward beyond the first reinforcing portion 2112, the second probe 221 includes a second base portion 2211 having a sheet shape and a second reinforcing portion 2212 formed by a lower side of the second base portion 2211 protruding outward, the second base portion 2211 protrudes leftward beyond the second reinforcing portion 2212, the second reinforcing portion 2212 and the first reinforcing portion 2112 are arranged symmetrically up and down, the second base portion 2211 and the first base portion 2111 are stacked, the second base portion 2211 and the first base portion 2111 are arranged in a sheet shape, the detection of the minute deviation of the rivet 300' is achieved, the structural strength of the first probe 211 and the second probe 221 is enhanced by the second reinforcing portion 2212 and the first reinforcing portion 2112, also, it is convenient for the first sensor 212 to accurately determine whether the first probe 211 is sensed and for the second sensor 222 to accurately determine whether the second probe 221 is sensed. In this embodiment, when the length of the rivet 300 'is over 1mm, both the first base portion 2111 and the second base portion 2211 touch the rivet 300', and when the length of the rivet 300 'is over 1mm, neither the first base portion 2111 nor the second base portion 2211 touch the rivet 300', of course, the gap size and the thickness between the first base portion 2111 and the second base portion 2211 can be adjusted according to the detection requirement in the specific implementation to realize different detection standards.

Compared with the prior art, the material 300 ' blocked by the second material distributing part 12 is blocked at the lower edge of the material 300 through the second material distributing part 12, the material 300 ' is separated from other materials 300 through the first material distributing part 11, the material 300 ' is limited at the detection position through the matching of the first material distributing part 11 and the second material distributing part 12, the first sensing part 21 and the second sensing part 22 which are sequentially arranged along the length direction of the material 300 ' respectively sense the material 300 ', whether the length of the material 300 ' meets the standard or not is obtained according to the sensing result, the length detection of the material 300 ' is realized, and the material 300 with the length not meeting the standard can be further removed according to the detection result.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.