阅读说明：本技术 架线式搬运器 (Stringing type carrier ) 是由 广濑幸泰 于 2019-02-18 设计创作，主要内容包括：提供一种在单体型的架线式搬运器中,在缓斜面及陡斜面的上升货物及下降货物的任一种集料中都能够使用的架线式搬运器。本发明的架线式搬运器包括：基座部件(1)；主索制动部件(10),具有与主索抵接的制动面,固定于基座部件；第一杠杆(20),具有：固定于基座部件的成为转动中心的第一支点；设置于与制动面相对的位置的第一杠杆制动面；向使第一杠杆制动面从制动面离开的方向施力的施力部件；以及能够通过动索的张力向使第一杠杆制动面接近制动面的方向施加力的驱动用滑轮；以及第二杠杆(30),具有：固定于基座部件并成为转动中心的第二支点；以及能够向使第一杠杆制动面从制动面离开的方向对第一杠杆进行按压的第一杠杆按压部。(Provided is a single-body trolley carrier which can be used for collecting any one of ascending cargoes and descending cargoes on a gentle slope and a steep slope. The trolley carrier of the invention comprises: a base member (1); a main cable brake member (10) having a brake surface that abuts against the main cable and fixed to the base member; a first lever (20) having: a first fulcrum fixed to the base member and serving as a rotation center; a first lever braking surface disposed at a position opposite to the braking surface; a biasing member for biasing the first lever braking surface in a direction away from the braking surface; and a driving pulley capable of applying a force in a direction in which the first lever braking surface approaches the braking surface by a tension of the movable cable; and a second lever (30) having: a second fulcrum fixed to the base member and serving as a rotation center; and a first lever pressing portion capable of pressing the first lever in a direction in which the first lever braking surface is separated from the braking surface.)

1. A trolley carrier for carrying cargo with a trolley line having a main line and a travelling line having a trigger, comprising:

a base member;

a main cable brake member having a brake surface abutting against the main cable and fixed to the base member;

a first lever having: a first fulcrum provided on the base member to be a rotation center; a first lever braking surface disposed opposite the braking surface; a biasing member that biases the first lever braking surface in a direction away from the braking surface; and a driving pulley capable of applying a force in a direction in which the first lever braking surface approaches the braking surface by a tension of the movable cable; and

a second lever having: a second fulcrum fixed to the base member and serving as a rotation center; and a first lever pressing portion capable of pressing the first lever in a direction in which the first lever braking surface is separated from the braking surface;

pressing the second lever against the first lever by the trigger indicating that the load reaches a predetermined height causes the first lever braking surface to move away from the braking surface.

2. The trolley carrier according to claim 1, wherein the trigger-contacting surface of the second lever is formed as a convexly curved surface.

3. The trolley carrier according to claim 1 or 2, wherein at least a part of said second lever is formed in two parallel plate shapes, and said first lever is arranged to cross therebetween.

4. The trolley carrier according to any one of claims 1 to 3, wherein at least a part of the second lever is formed in two parallel plate shapes, and the movable cable is disposed therebetween.

5. The trolley carrier according to any one of claims 1 to 4, wherein a moving part of the second lever for preventing the moving wire from being detached from the second lever is installed to be slidable in a length direction of the second lever.

6. The trolley carrier according to any one of claims 1 to 5, wherein said braking surface is provided on a part which is replaceable with respect to said main rope braking part.

7. The trolley carrier according to any one of claims 1 to 6, wherein the first lever braking surface is provided on a component that is replaceable relative to the first lever.

8. The trolley according to any one of claims 1 to 7, wherein a correction base pulley is provided below the driving pulley, and the correction base pulley corrects the wire of the wire in a direction in which a force in a direction in which the first lever braking surface approaches the braking surface is applied to the first lever with respect to the driving pulley even when the wire is pulled by the load to an opposite side of a traveling direction.

Technical Field

The present invention relates to a trolley type carrier.

Background

The trolley conveyor is used for collecting logs for felling. The trolley type carrier is a type of carrying by air suspension (patent document 1) and a type of carrying by ground traction (patent document 2). Among the types of conveyance by ground traction, a so-called single-body type trolley conveyor in which a conveyor is moved by one winch has the following problems.

For example, there are the following problems in lifting cargo: before the end of the log is lifted, the trolley carrier is moved in the pulling direction of the travelling cable. Therefore, if the trolley carrier moves in the pulling direction, it is difficult to apply a force in the direction in which the end portion floats, and particularly if an obstacle such as a rock or a stump exists, there is a problem that the timber cannot move over the obstacle. If the wire is forcibly pulled by the winch in such a state, the tension is increased, and therefore, the wood rapidly flies out of the obstacle when passing over the obstacle, which is a very dangerous problem.

On the other hand, there are also the following problems in lowering the cargo: the stringing itself is declined, so the carrier slips quickly and is very dangerous due to the weight of the stringing carrier itself or the pulling of the winch, and the end of the timber cannot be lifted. Further, since the inclined surface is formed, there is a risk that the wood slips before the carrier. This is because the steeper the slope, the more dangerous the state. For these reasons, conventionally, the monotype trolley is not suitable for lowering the load.

Patent document 1: japanese patent laid-open publication No. 2016-160036.

Patent document 2: japanese Kokai publication Hei-05-64184.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a trolley type carrier that can be safely used without danger for any kind of aggregate of ascending and descending loads on a gentle slope and a steep slope.

In order to achieve the above object, the present invention adopts the following means.

The present invention provides a trolley carrier for carrying a load by using a trolley wire having a main wire and a movable wire having a trigger, the trolley carrier comprising:

a base member;

a main cable brake member having a brake surface abutting against the main cable and fixed to the base member;

a first lever having: a first fulcrum provided on the base member to be a rotation center; a first lever braking surface disposed opposite the braking surface; a biasing member that biases the first lever braking surface in a direction away from the braking surface; and a driving pulley capable of applying a force in a direction in which the first lever braking surface approaches the braking surface by a tension of the movable cable; and

a second lever having: a second fulcrum fixed to the base member and serving as a rotation center; and a first lever pressing portion capable of pressing the first lever in a direction in which the first lever braking surface is separated from the braking surface,

pressing the second lever against the first lever by the trigger indicating that the load reaches a predetermined height causes the first lever braking surface to move away from the braking surface.

According to the trolley wire carrier of the present invention, basically, when tension due to the load is applied to the movable cable, the trolley wire carrier does not move unless the second lever is pushed up by the trigger and the first lever braking surface is separated from the braking surface with respect to the first lever, that is, unless the state optimal for lifting and carrying the load is obtained, and therefore, the trolley wire carrier is excellent in safety and can be used for either lifting or lowering the load. In addition, when the load is moved by an operation other than the movement of the load by the original travelling cable, the trolley conveyor is immediately braked, and therefore ground traction with further excellent safety can be performed.

Further, in the trolley carrier of the present invention,

it may be characterized in that the trigger-contacting surface of the second lever is formed as a convexly curved surface.

With this configuration, even when the tension of the movable cable generated by the load is in either the traveling side or the opposite side to the traveling side of the trolley carrier, the force for moving the first lever braking surface in the direction away from the braking surface can be applied to the first lever by the second lever.

In the trolley carrier according to the present invention, at least a part of the second lever may be formed in two parallel plate shapes, and the first lever may be arranged to intersect therebetween.

By adopting this structure, the possibility of the first lever and the second lever being twisted can be reduced. Further, the possibility of deviation of the crossing state between the first lever and the second lever can be reduced.

In the trolley carrier according to the present invention, at least a part of the second lever may be formed in two parallel plate shapes, and the movable cable may be disposed therebetween.

With this configuration, the trigger attached to the movable cable can reliably push up the second lever.

In the trolley carrier according to the present invention, the moving member of the second lever for preventing the moving wire from coming off the second lever may be slidably attached in the longitudinal direction of the second lever.

With this configuration, the movable cable can be prevented from coming off the second lever.

In the trolley carrier according to the present invention, the braking surface may be provided on a member that can be replaced with the main-cable braking member.

With this configuration, the brake surface can be easily replaced even when worn.

In the trolley carrier according to the present invention, the first lever braking surface may be provided on a member that can be replaced with respect to the first lever.

By adopting this configuration, it is possible to easily replace even if the first lever braking surface is worn.

In the trolley conveyor according to the present invention, the drive pulley may be provided with a correction base pulley below the drive pulley, the correction base pulley correcting the wire of the wire in a direction in which the first lever applies a force to the first lever in a direction in which the first lever braking surface approaches the braking surface, even when the wire is pulled by the load in a direction opposite to a traveling direction.

With this configuration, even when the movable cable is pulled in either the traveling direction or the direction opposite to the traveling direction, a force in a direction in which the first lever braking surface approaches the braking surface can be applied to the first lever, and braking can be reliably performed.

Drawings

Fig. 1 is a perspective view of a trolley carrier 100 according to the present embodiment.

Fig. 2 is a front view of the trolley carrier 100 according to the present embodiment.

Fig. 3 is a front view showing the operation of the trolley carrier 100 according to the present embodiment.

Fig. 4 is a front view showing the operation of the trolley carrier 100 according to the present embodiment.

Fig. 5 is an explanatory diagram for explaining a state of force balance of the trolley carrier 100 according to the present embodiment.

Fig. 6 is an explanatory diagram for explaining a use state of the trolley carrier 100 according to the present embodiment.

Fig. 7 is an explanatory diagram for explaining a use state of the trolley carrier 100 according to the present embodiment.

Fig. 8 is an explanatory diagram for explaining another embodiment of the trolley carrier 100 according to the present embodiment.

The specific implementation mode is as follows:

the trolley carrier 100 according to the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a perspective view of a trolley carrier 100 according to the present embodiment, and fig. 2 is a front view of the trolley carrier 100 according to the present embodiment.

The trolley carrier 100 of the present invention uses a trolley line comprising a main cable 110 for suspending the trolley carrier 100 and a travelling cable 120 for moving the trolley carrier 100, and is a single-unit carrier whose movement is controlled by one winch. The present trolley carrier 100 is particularly suited for gathering logs as cargo by ground traction.

As shown in fig. 1, the trolley carrier 100 of the present invention mainly includes: a base member 1; a main rope brake member 10 attached to the base member 1; a first lever 20 for pressing the main rope 110 against the main rope brake part 10 according to the tension of the movable rope 120; a second lever 30 for moving the first lever 20 by a trigger 60 mounted to the moving wire 120; and a plurality of base pulleys (41-44) for guiding the main cable 110 and the movable cable 120. For convenience, in the present embodiment, a state in which the right direction in fig. 2 is set as the traveling direction will be described as an example.

The base member 1 is made of a plate material having high rigidity such as an iron plate, and is a member for fixing the main rope brake member 10, the first lever 20, the second lever 30, the base pulley 41, and the like, and the form thereof is not particularly limited.

The main cable stopper member 10 is disposed adjacent to the main cable 110, and fixes the relative position of the trolley 100 with respect to the main cable 110 by sandwiching the main cable 110 with the first lever 20. In the present embodiment, the brake shoe is formed of a block-shaped block, and the surface facing the main rope 110 serves as the braking surface 11. The braking surface 11 is disposed at a position where a slight gap is formed with respect to the main cable 110 in a state where the trolley carrier 100 is movable, that is, in a state where no force is applied to the main cable 110 from the trolley carrier 100. Since the braking surface 11 is cut due to wear, the braking surface portion 11a may be provided by a bolt or the like so as to be detachable from the main-cable braking member 10, or may be embedded or replaceable, as shown in fig. 2.

The first lever 20 is disposed on the opposite side of the main cable brake member 10 with respect to the main cable 110 interposed therebetween, and has a function of fixing the trolley carrier 100 to the main cable 110 by sandwiching the main cable 110 with the main cable brake member 10. As shown in fig. 2, the first lever 20 is provided with a first fulcrum 21 on the left side opposite to the braking surface 11 in the traveling direction, and is rotatable about the first fulcrum 21. The first pivot 21 is provided with a first pulley 25 for the movable cable 120. Further, a driving pulley 26 for the movable cable 120 is provided on the left side of the first fulcrum 21 of the first lever 20. An arcuate portion 23 formed in an arcuate shape is formed on the traveling direction side of the first fulcrum 21, and an urging member 50 such as a spring is provided at the tip of the arcuate portion 23 to urge the first fulcrum 21 in the rightward rotational direction. A first lever stopper surface 24 is formed on the right side of the first fulcrum 21 and on the upper surface side at a portion that comes into contact with the main cable 110 when the first lever 20 is rotated leftward. Since the first lever braking surface 24 is also cut due to wear similarly to the braking surface 11, the first lever braking surface portion 24a having the first lever braking surface 24 can be provided so as to be replaceable similarly as shown in fig. 2. In the present embodiment, as shown in fig. 1, at least a part of the arcuate portion 23 of the first lever 20 is formed thinner than other portions. The portion having the first pulley 25 and the driving pulley 26 is formed of two parallel plates, and the first pulley 25 and the driving pulley 26 are disposed therebetween. By adopting this structure, the strength of the first lever 20 can be improved. Further, by passing the movable cable 120 therebetween, the possibility of the movable cable 120 falling off from the first lever 20 can be reduced. However, the form of the two parallel plates is not essential, and a pulley or the like may be provided on one plate.

As shown in fig. 1 or 2, the second lever 30 is formed in an arcuate shape having a curved surface in a convex shape on which a trigger 60 described later comes into contact, and has a second fulcrum 31 on the right side and lower side of the first fulcrum 21, and the second lever 30 is rotatable about the second fulcrum 31. The second lever 30 is formed by fixing two parallel plate materials branched into two strands by a pillar (not shown) with a gap. The arcuate portion 23 of the first lever 20 is disposed between the parallel plates. Thereby, the first lever 20 and the second lever 30 are arranged crosswise. A first lever pressing portion 32 is provided at or near the right end of the second lever 30, and when the second lever 30 is rotated rightward, the arcuate portion 23 of the first lever 20 can be pressed downward. A groove 34 is formed on the left side of the second lever 30 in the longitudinal direction, and a moving member 33 that is movable in the longitudinal direction in the groove 34 is attached so as to span two sheet materials. Further, the left end of the second lever 30 is formed so that the front ends of the parallel plate materials are open, and when the second lever 30 is largely rotated rightward, the main cable 110 is easily inserted into the parallel plate materials.

The base pulleys (41-44) are pulleys directly mounted on the base member 1 and guide the main cable 110 and the movable cable 120. The main rope 110 is guided by a first base pulley 41 and a second base pulley 42, a third base pulley 43 for guiding the movable rope 120, and a correcting base pulley 44 for correcting the direction of the movable rope 120 relative to the driving pulley 26. The first base pulley 41 and the second base pulley 42 are pulleys for suspending the trolley carrier 100, and are disposed on both sides of the main-cable braking member 10, and the main cable 110 is disposed slightly downward from the braking surface 11. The third base pulley 43 is disposed on the right side of the first fulcrum 21 such that the upper surface of the third base pulley 43 is positioned above the lower surface of the first pulley 25, and the cable 120 is in contact with the lower surface of the first pulley 25. The correction base pulley 44 is used to effectively apply a tension of the cable 120 to the driving pulley 26 downward even when the tension is applied to the opposite side to the traveling direction, and the right side surface of the correction base pulley 44 is disposed substantially below the left side surface of the driving pulley 26.

Further, a cover for covering the front surface may be provided as needed, or a block or a pulley for guiding the main rope 110 or the movable rope 120 may be added as appropriate.

The trolley carrier 100 configured as described above is used as follows. First, as shown in fig. 2, the trolley carrier 100 suspends the first base pulley 41 and the second base pulley 42 on the main cable 110, and arranges the movable cable 120 so as to pass over the upper surface of the third base pulley 43, below the first pulley 25 of the first fulcrum 21, the upper surface and the left side surface of the driving pulley 26, and the right side surface of the correcting base pulley 44. A load such as a log 200 is attached to an end of the movable rope 120. Further, a trigger 60 is attached between the second lever 30 of the movable rope 120 and the log 200 at a position contacting the second lever 30 when the condition for moving the log 200 to lift one end of the load is perfect.

In this state, in a case where no tension is applied from the log 200 to the movable wire 120, that is, in a state where the log 200 is not lifted at all, the first lever 20 is biased in the rightward rotational direction by the biasing member 50. Therefore, the first lever braking surface 24 is not in contact with the main cable 110 and is not in a state of braking the main cable 110. Therefore, the trolley carrier 100 can freely move along the main rope 110.

If the movable rope 120 is pulled from this state and a force for lifting the log 200 is applied through the movable rope 120, the load W of the log 200 applies a tension T to the movable rope 120. At this time, the load W is the tension T. The driving pulley 26 is downwardly biased by the tension T applied to the movable cable 120, and the first lever 20 rotates leftward about the first fulcrum 21 as shown by an arrow in fig. 3. By this rotation, the first lever braking surface 24 presses and holds the main cable 110 toward the braking surface 11, and the trolley carrier 100 is fixed to the main cable 110.

Since the trolley carrier 100 is fixed to the main wire 110 if the movable wire 120 is pulled further from this state, the cargo can be lifted while the position of the trolley carrier 100 with respect to the main wire 110 is fixed, without pulling the trolley carrier 100 as in the conventional case.

If the cable 120 is further pulled from this state, the second lever 30 is rotated to the right as shown in fig. 4 by the trigger 60 mounted to the cable 120. By this rightward rotation, the arcuate portion 23 of the first lever 20 is pressed downward by the first lever pressing portion 32 and rotated rightward, the first lever stopper surface 24 is released, and the trolley wire carrier 100 fixed to the main wire 110 can move. Therefore, if the trolley wire 120 is pulled, the trolley carrier 100 moves together with the logs 200. Thereby moving the logs 200 to the target location.

The relationship of the force at this time is as follows. As shown in fig. 5, respectively, T is in the following cases: tension applied to the moving cable 120

F: force to rotate the second lever 30 to the left by the trigger 60

H: resistance at the contact point of the first lever 20 and the second lever 30

a: distance between first fulcrum 21 and operating point of driving pulley 26

b: distance between first fulcrum 21 and action point which is contact point of first lever 20 and second lever 30

c: distance between the second fulcrum and the point of action which is the contact point of the first lever 20 and the second lever 30

d: distance of the second fulcrum from the point of action which is the contact point between the trigger 60 and the second lever 30

α: angle of a to main rope

Beta: b angle to main cable

γ: c angle to main cable

: d angle to main cable

The vertical component of the rotational moment of the first lever 20 is balanced by

T·a·cosα＝H·b·cosβ。

The vertical component of the rotational moment of the second lever 30 is balanced by

H·c·cosγ＝F·d·cos。

Therefore, the relationship between the tension T of the wire 120 and the pushing-up force F of the trigger 60 is as follows, in which the trigger 60 rotates the second lever 30 to the right, and the first lever 20 is rotated to the right by the first lever pressing portion 32 at the brake release starting point P (a position where the pressing force of the first lever pressing portion 32 disappears and the wire can move freely with respect to the main wire by pressing the second lever 30 by the trigger 60, see fig. 5).

F＝(a·cosα×c·cosγ)/(b·cosβ×d·cos)

Therefore, when a force exceeding the sum (W + F) of the weight W of the log 200 and the pushing-up force F of the trigger 60 is applied to the movable cable 120, the second lever 30 rises beyond the braking release start point, the first lever 20 is rotated rightward, and the braking surface is released, so that the movable cable can move freely.

In addition, F can be made to be smaller than W by a < b in the first lever 20 and c < d in the second lever 30. However, since α, β, and γ change in accordance with the rotation of the first lever 20 and the second lever 30, it is important to set β and γ on the longer side to 90 ° or less in the movable regions of the two levers.

In moving, in the case of lifting the load, basically, the trolley carrier 100 itself does not rise by its own weight, and the logs 200 also travel with delay with respect to the trolley carrier 100, so that the above principle is easily followed.

In contrast, when the load is lowered, the trolley carrier 100 may slide down the main rope 110 by its own weight by a distance equal to or more than the traction distance of the movable rope 120. If the trolley carrier 100 slips, the trigger 60 descends below the brake release start point because the trolley carrier 100 moves ahead of the raw wood 200. Therefore, since the pressing force from the second lever 30 disappears and the tension acts on the first lever 20, the first lever 20 rotates leftward. Thereby, the trolley carrier 100 is braked, and is braked by a slight slip. As a result of the experiment, it was confirmed that the brake was applied at about 10 to 20 cm. From this braked state, if the pulling of the movable rope 120 is continued as described above, the log 200 is pulled again, and the second lever 30 is brought to the brake release starting point by the trigger 60, so that the trolley 100 can be moved together with the cargo.

In either case of raising or lowering the load, the logs 200 may fly out prior to the overhead wire carrier 100, for example, when the tension of the strop 120 is maintained at a high level at the moment of crossing an obstacle, or when the log descends along a steep slope. In this case, the following operation is performed. The moving rope 120 is strongly pulled in the case where the logs 200 first travel on the trolley carrier 100. Therefore, the pressing force from the second lever 30 disappears and the tension acts, so that the first lever 20 rotates leftward. Therefore, the trolley carrier 100 is braked and fixed. Therefore, the advance of the log 200 is immediately stopped, and the advance is prevented from exceeding a predetermined amount. This prevents the raw wood 200 from advancing greatly, and therefore the raw wood 200 can be conveyed safely. From this state, the log 200 is pulled, and if the brake is released by the trigger 60, the movement is restarted.

The unloading operation after the completed log 200 is conveyed to the destination is as follows. The log 200 reaches the destination and stops the pulling of the movable rope 120, and if the log 200 is slightly lowered, the trigger 60 is lowered from the brake release starting point, and the trolley carrier 100 is braked. In this state, if the tension of the movable rope 120 is relaxed, the log 200 drops by the amount of the relaxation. Therefore, when the logs 200 are lowered, the discharge can be safely performed in a state where the trolley carriers 100 are fixed.

The trolley carrier 100 according to the present invention may be loaded from a direction other than the vertically downward direction during each of the loading, aggregate movement, and unloading stages. However, when there is a load on the traveling direction side from the vertically lower side, a force in a direction of rotating the first lever 20 leftward is reliably applied to the driving pulley 26 as shown in fig. 6. Since the movable cable 120 is disposed between the two parallel plate materials with respect to the second lever 30, the second lever 30 is not directly forced by the movable cable 120 except for the force generated by the trigger 60, and the second lever 30 can be reliably rotated rightward when the trigger 60 abuts.

On the other hand, when there is a load on the opposite side of the travel direction from the vertically lower side, as shown in fig. 7, the drive pulley 26 is pulled vertically downward by the correction base pulley 44, and therefore, a force in a direction of rotating the first lever 20 leftward is reliably applied to the drive pulley 26. Further, since the second lever 30 is formed in two parallel plate shapes, the main cable 110 and the movable cable 120 can pass therethrough without resistance. Therefore, the second lever 30 can be prevented from receiving the force directly from the main cable 110 and the movable cable 120 except for the force generated by the trigger 60. In addition, even if the angle of the movable wire 120 is changed due to dragging of the load, the movable wire 120 can be prevented from being detached from the second lever 30. When the second lever 30 is located at the lower limit position, even if the load is pulled from the opposite side to the traveling direction, the moving member 33 slides upward, preventing the second lever 30 from being forced by the movable wire 120 and preventing the movable wire 120 from falling off. Therefore, even if the angle at which the cargo is pulled is deflected from directly below toward any direction between horizontal until the trigger 60 presses the second lever 30, the second lever 30 does not exert a force on the first lever 20. Therefore, the hoist cable 120 can be pulled while the trolley carrier 100 is held and fixed. On the other hand, when the second lever 30 is at the upper limit position, the moving member 33 slides to the lower limit, and the main rope 110 can pass through the inside without resistance. Therefore, the second lever 30 can be prevented from being forced from the main cable 110 and the moving cable 120 except for the trigger 60.

As described above, according to the trolley carrier 100 of the present invention, in addition to lifting the load, the drop due to the self weight of the trolley carrier 100 can be prevented even in the case of lowering the load, and therefore, the trolley carrier 100 can be applied to lowering the load.

Further, even when the load suddenly flies out in the traveling direction or the load slips due to a steep slope, the trolley conveyor 100 is braked, and thus the load can be conveyed more safely.

Further, since the trolley carrier 100 of the present invention has the drop-off prevention mechanism for the movable cable 120, even a load other than the lateral direction of the trolley carrier 100, that is, other than the load under the wire of the main cable 110 can be laterally picked up in a state where the trolley carrier 100 is fixed. In particular, since the cargo can be laterally captured at the position where the trolley carrier 100 is fixed, the cargo can be transported substantially below the trolley carrier 100 located at an appropriate position by fixing the trolley carrier 100 at the position where the lateral capture is desired.

The present invention is not limited to the configuration of the embodiment, and can be appropriately modified within a range not departing from the gist of the present invention.

In the above embodiment, the case where the raw wood 200 is used as the cargo has been described, but cargo other than the raw wood may be used. In addition, the present invention can be used for suspended conveyance.

As shown in fig. 8, an end 121 of the movable cable 120 may be fixed to a part of the base member 1 with the movable pulley 70 interposed therebetween. By adopting this structure, the cargo can be lifted with about half the force. At this time, the trigger 60 may be attached to the movable pulley 70. Further, since the tension between the trolley 100 and the winch is 2 to 1 with respect to the tension between the load and the trolley 100, the trolley 100 is pulled toward the load, the trolley 100 is less likely to shift toward the winch, the tension of the movable cable 120 is halved, and the pressing force of the braking surfaces 11 and 24 is halved, so that the wear of the braking surfaces 11 and 24 can be reduced.

Industrial applicability

As shown in the above embodiments, the present invention can be used as a transportation facility for logs, and can also be used for cargo transportation in civil engineering, construction, warehouse, and transportation fields.

Description of the reference numerals

Base, main cable braking, braking surface, lever, first lever, second fulcrum, second lever, second fulcrum, first lever, second lever, first lever, second lever, first lever, second lever, first lever, second lever, first lever, second lever, first lever, second.