JPS6315237B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winch, and more particularly to a structure for realizing a completely released state of a wire rope in a winch that moves the wire rope forward or backward while repeatedly grasping and releasing the wire rope.

In a winch that moves the wire rope forward or backward while repeatedly gripping and releasing the wire rope, the gripping mechanism inside the winch must be fully released in order to insert or remove the wire rope. Therefore,
Usually, a lever or the like for performing this operation is provided separately from each lever for advancing and retracting the wire rope.

Therefore, the main object of the present invention is to provide a mechanism for setting the fully released state to the back operation lever itself, which is operated to move the wire rope backward, without requiring a special lever or the like to set the wire rope to the fully released state. It is to provide an additional winch.

Other objects and features of the present invention will become more apparent from the detailed description given below with reference to the drawings.

FIG. 1 is a plan view of one embodiment of the present invention.
FIG. 2 is a front view of the winch shown in FIG. 1 with the front housing removed. FIG. 3 is a right side view of the winch of FIG. 1. Figure 4 shows line 4 in Figure 2.
It is a sectional view showing a cross section along line A-4A in the left half and a cross section along line 4B-4B in the right half.

The winch shown here includes case 1. A wire rope 2 is inserted through the case 1, and openings 3 and 4 are formed at both ends of the case 1, respectively, for introducing or leading out the wire rope 2. One opening 3 is defined by a bush-shaped rope guide 5. The other opening 4 serves as a wire rope insertion port and also serves as an opening for leading out other members from inside the case 1 to the outside. That is, the opening 4 also serves as an opening for leading out the anchor plate 7 that holds the anchor hook 6 and for leading out the forward operating fork 9 that holds the forward operating lever 8 to the outside. Both the anchor plate 7 and the forward operation fork 9 are rotatably supported by a center pin 10 fixedly positioned on the case 1. Therefore, the size of the opening 4 is selected to allow this rotation of the anchor plate 7 and the forward operation fork 9. Anchor hook 6 is rotatably supported by anchor pin 11 attached to anchor plate 7. A hook collar 12 is fitted around the outer periphery of the anchor pin 11, and the anchor hook 6 is positioned thereby. The forward operating lever 8 and the forward operating fork 9 are fixed by countersunk rivets 13 and safety pins 14. The safety pin 14 is provided to prevent the winch from being damaged by shearing when a load exceeding a predetermined value is applied between the forward operating lever 8 and the forward operating fork 9. be.

Two sets of clamp claws 15 and 16 are arranged in relation to the insertion path of the rope 2. Each set of clamp claws 15 and 16 includes an upper claw 17 and a lower claw 1, respectively.
Contains 8. In relation to the first set of clamp claws 15,
A first pivot link 19 and a first auxiliary link 20 are arranged adjacent thereto. A second pivot link 21 and a second auxiliary link 22 are arranged in association with the second set of clamping claws 16 and adjacent thereto. Each rotation link 19, 21 and each auxiliary link 20, 22 is connected to each clamp claw 1.
Two pieces are provided on both sides of numbers 5 and 16. Link 19,
A front side plate 23 and a rear side plate 24 are arranged further outside of 20, 21, and 22. The front side plate 23 is rotatably connected to the forward operating fork 9 by a lower lever pin 25 provided at the lower end of the forward operating fork 9.

The front side plate 23 is connected to the first rotation link 1
9 and the first auxiliary link 20, each link 19, 2 is
It is rotatably connected to 0. The rear side plate 24 is connected to the center pin 10 of the forward operation fork 9.
It is rotatably connected to the forward operation fork 9 by an upper lever pin 27 located on the opposite side of the lower lever pin 25 through the upper lever pin 27 . Second rotation link 2
A lower link pin 28 is provided at the lower end of each of the first and second auxiliary links 22, whereby each link 21, 22 is rotatably connected to the rear side plate 24. Each link 19, 20, 2
1 and 22 are each provided with a locking pin 29. In association with each stop pin 29, a stop pin 30 is provided on the front side plate 23 and the rear side plate 24, respectively. A spring 31 is mounted on the outer peripheral surface of each of the lower link pins 26 and 28. Both legs of each spring 31 are arranged in contact with the stop pin 29 and the stop pin 30, respectively. As a result, each link 19, 20, 21, 22 is connected to the second
In the figure, it is urged to rotate clockwise. In addition, each link 19, 20, 21, 22
The operational interlocking structure between the clamp claws 15 and 16 will be described later with reference to FIGS. 5 and 6.

The structure of the vicinity of the center pin 10, which is the center of rotation of the forward operating fork 9, is clearly shown in the left half of FIG. However, it should be pointed out that the cross-section shown in the left half of FIG. 4 is shown with the forward operating fork 9 and the forward operating lever 8 oriented straight up and down in FIG. It should be pointed out that the cross section shown in the right half of FIG. 4 is taken along line 4B--4B in FIG. 2 in the state of FIG. 9, which will be described later. The structure of the vicinity of the second rotation link 21, which is clearly shown in the right half of FIG. 4, will now be described.

An opening 32 is formed at the upper rear portion of the case 1 . Through this opening 32, the back operation lever 3
3 is derived to the outside. One end of the back operation lever 33 is rotatably connected to the second rotary link 21 by a link upper pin 34 provided at the upper end of the second rotary link 21. A back lever pin 3 is located in the middle of the back operation lever 33.
5 is provided, whereby the rear part of the back link 36 is rotatably connected to the back operating lever 33. The front part of the back link 36 is rotatably connected to the upper end of the first rotation link 19 by a link upper pin 37. Back operation lever 33
is rotatable, and therefore the opening 32 is sized to allow this rotation. Note that the back operation lever 33 is not supported by a pivot shaft fixed to the case 1, but is held by the back link 36 and the second rotation link 21. The back lever pin 35 has a portion 38 that projects in the thickness direction of the back operating lever 33 and the back link 36. In association with the protrusion 38, a latch 39 for selectively locking the protrusion 38 is fixedly provided on the inner wall of the case 1. The combination of the protrusion 38 and the latch 39 is a feature of the present invention.

FIG. 5 is an illustrative front view illustrating the operational interlocking structure of the clamp claw and the rotation link. FIG. 6 is a sectional view taken along the line - in FIG. 5. Although it can be said that FIGS. 5 and 6 illustrate both the first set of clamp claws 15 and the second set of clamp claws 16, for convenience of explanation, only the second set of clamp claws are shown here. The following explanation will be given assuming that 16 is shown.

Two protruding wing-shaped parts 40 each having a substantially semicircular cross section are provided on both sides of the upper claw 17. The lower claw 18 is also provided with two similar wing-shaped parts 41 on both sides. The rotation link 21 and the auxiliary link 22 each have a pair of opposing wing-shaped parts 4.
A through hole 42 is provided for receiving 0,41. The through hole 42 has a shape in which one circle is divided along one diameter thereof, and the two semicircles thus divided are shifted from each other along the diameter. The combination of the wing-shaped parts 40, 41 and the through holes 42 is configured so that when the links 21, 22 rotate, the distance between the upper claw 17 and the lower claw 18 is widened or narrowed. There is. Its operation will be explained below.

The distance a defined by the outermost ends of the pair of wing-shaped parts 40 and 41 correlates with the vertical dimension of the through hole 42 in FIG. This vertical dimension is the link 2
1 and 22 are changed when they rotate. That is, when the links 21 and 22 are rotated in the direction of arrow 43, they become smaller, and conversely, when they are rotated in the direction of arrow 44, they become larger. From this, when the links 21 and 22 are rotated in the direction of the arrow 43, the distance a becomes smaller, and the upper claw 17 and the lower claw 1
8 will be closer to each other. In this state, the second set of clamp claws 16 is attached to the wire rope 2.
grasp. On the other hand, the links 21 and 22 are connected to the arrow 44
When the upper claw 17 and the lower claw 18 are rotated in the direction shown in FIG. This causes the second set of clamp claws 16 to release the wire rope 2. Furthermore, regarding the first set of clamp claws 15,
are configured similarly.

In the above configuration, next, the operation when rotating the forward operation lever 8 to move the wire rope 2 forward will be described. In the following description, it is assumed that the wire rope 2 has already been inserted through the first and second sets of clamp claws 15 and 16. As is clear from the configuration shown in FIG. 2, when the forward operation lever 8 is reciprocated, the first rotation link 19 and the first auxiliary link 20 reciprocate in the same direction via the front side plate 23. Rotated. Further, the second rotation link 21 and the second auxiliary link 22 are rotated back and forth via the rear side plate 24 in the opposite direction to the rotation direction of the links 19 and 20. When the forward operating lever 8 is rotated in the direction of the arrow 45 during this rotation in mutually opposite directions, the first rotation link 19 and the first auxiliary link 20 both correspond to the arrow 43 in FIG. The second rotation link 21 first rotates in the direction of
and the second auxiliary link 22 is indicated by arrow 4 in FIG.
Rotation in four directions occurs first. Accordingly, the first
The pivot link 19 and the first auxiliary link 20 force the first set of clamp claws 15 into a gripping motion to grip the wire rope 2. On the other hand, the second rotation link 21 and the second auxiliary link 22
forces the second set of clamp claws 16 to perform a releasing operation, thereby releasing the wire rope 2. Then, the first set of clamp claws 15 on the side that grips the wire rope 2 moves forward by the amount of rotation of the first rotation link 19 and the first auxiliary link 20, and moves the wire rope 2 forward at the same time.
Next, when the forward operation lever 8 is rotated in the direction of arrow 46, the first rotation link 19 and the first auxiliary link 20 apply a releasing action to the first set of clamp claws 15, and vice versa. , the second rotation link 21 and the second auxiliary link 22 provide a gripping action to the second set of clamp claws 16 . By this,
Second rotation link 21 and second auxiliary link 2
The second set of clamp claws 16 moves forward by the amount by which the wire rope 2 rotates, and the wire rope 2 moves forward together with this. In this way, each set of clamp claws 15, 1
The wire rope 2 is advanced while being alternately gripped and released by the wire rope 6.

Next, the operation for reciprocating the back operation lever 33 to move the wire rope 2 backward will be explained. When the back operation lever 33 is rotated back and forth, the back operation lever 33 is rotated about the approximate midpoint between the upper link pin 34 and the back lever pin 35, as shown by solid lines and imaginary lines in FIG. Ru. First, the back operation lever 33
When rotated in the direction of the arrow 47, the first rotation link 19 and the first auxiliary link 20 are rotated in the direction corresponding to the arrow 44 in FIG. 5 via the back link 36. On the other hand, the second rotation link 21
And the second auxiliary link 22 is rotated in the direction 43 in FIG. In response, the first rotation link 19 and the first auxiliary link 20 apply a releasing action to the first set of clamp claws 15 . on the other hand,
Second rotation link 21 and second auxiliary link 2
2 provides a gripping action to the second set of clamp claws 16. The second set of clamp claws 16 is connected to the second rotating link 21 and the second auxiliary link 22.
The wire rope 2 is moved backward by the amount of rotation, and the wire rope 2 is moved backward accordingly. Next, back control lever 3
3 is rotated in the direction of arrow 48, the first rotation link 19 and the first auxiliary link 20 are rotated in the direction of the arrow 48.
A gripping action is applied to the set of clamp claws 15.
On the other hand, the second rotation link 20 and the second auxiliary link 22 provide a releasing action to the second set of clamp claws 16 . Accordingly, the first set of clamp claws 15 is moved back by the amount of rotation of the first rotation link 19 and the first auxiliary link 20, and the wire rope 2 is moved back accordingly. In this manner, the wire rope 2 is moved backward while the wire rope 2 is alternately gripped and released by the reciprocating rotation operation of the back operation lever 33.

Next, a complete release operation for the wire rope 2, which is a feature of the present invention, will be explained.

FIG. 7 schematically shows a state in which the wire rope is pulled out. FIG. 8 schematically shows the state immediately before the clamp claw is fully released. FIG. 9 schematically shows a state in which the clamp claw is fully released.

Referring to FIG. 7, the back operation lever 33, the back link 36, the first pivot link 19, and the second pivot link 21 shown in phantom lines correspond to the state shown in FIG. That is, the wire rope 2 is inserted therethrough. When the wire rope 2 is pulled out from this state, the spring 31 mentioned above acts, and as shown by the solid line in FIG.
Back lever 33 and back link 36 are displaced. This is because the wire rope 2 does not exist between the upper claw 17 and the lower claw 18 of each clamp claw 15, 16, so the upper claw 17 and the lower claw 18
This is because they are in a state where they can approach each other, and accordingly, the action of the spring 31 causes the first rotation link 19 and the second rotation link 21 to assume the postures shown by solid lines.

In FIG. 8, the back operation lever 33 and the back link 36 shown in solid lines are connected to the clamp claw 1.
It shows the state to be operated immediately before realizing the fully released state of 5 and 16. This state shown by the solid line must be achieved both when inserting the wire rope 2 and when removing the inserted wire rope 2. The position of the back operating lever 33 shown in phantom lines in FIG. 8 corresponds to the state of the back operating lever 33 shown in solid lines in FIG. Therefore, as can be understood by referring to both FIGS. 7 and 8, regardless of the presence or absence of the wire rope 2, the back operating lever 33 must first be placed in the state shown by the solid line in FIG. .

By displacing the back operation lever 33 from the state shown in FIG. 8 to the state shown in FIG. 9, the completely released state of the clamp claws 15 and 16 can be obtained. As a preparatory operation for realizing this state, first, the forward operating lever 8 is rotated further counterclockwise than the state shown by the solid line in FIG. Next, the back operation lever 33 is strongly pushed in the direction shown by the arrow 49 in FIG. 8, and while maintaining this state, the protrusion 38 is displaced in the direction of the arrow 50, which points substantially forward. In response, as shown in FIG. 9, the protrusion 38 engages with the latch 39, and the postures of the back operating lever 33 and the back link 36 are maintained. In this state, both the first rotation link 19 and the second rotation link 21 have been rotated in the direction of arrow 44 (FIG. 5), and both are in the wire rope release state, that is, completely Achieving a state of liberation. Note that the first and second auxiliary links 20 and 22, which are not shown in FIG.
It takes the same attitude as the rotation links 19 and 21 of.

In this way, a fully released state of the wire rope is obtained. In this state, the wire rope is inserted or removed.

In the state shown in FIG. 9, the back operation lever 33
When the latch 39 is displaced in the direction of the arrow 51, the aforementioned projection 38 and the latch 39 are easily disengaged.

In the embodiment described above, as explained in FIG. 2, the wire rope 2 is moved by operating the forward operation lever 8.
When moving forward, the wire rope 2 transitions from right to left. Therefore, when a load is applied to the wire rope 2, the first and second pivot links 19, 21 are forced to pivot in the direction of arrow 43 (FIG. 5). Therefore, in order to achieve the fully released state shown in FIG. 9 as described above, the first
and the second rotation links 19, 21 with the arrow 4
It must be rotated in the direction of arrow 44 opposite to 3. This means that a full release operation is not possible while a load is being applied and therefore there is no risk of a full release condition being applied while a load is being applied. Preferable from the point of view of safety. Furthermore, in order to further prevent danger during operation, a torsion coil spring 5 as shown in FIG.
2 around the upper link pin 34, the back operating lever 33 extends in a straighter state with respect to the second rotating link 21, that is, the back operating lever 33 extends counterclockwise around the upper link pin 34. It may also be biased in the direction of rotation.
This reliably prevents the posture of the back operation lever 33 shown by the solid line in FIG. 8 necessary for the fully released state from occurring naturally or due to human carelessness. .

For example, as shown in FIG. 7 by drawing a dashed line 53 on the back operation lever 33 to show the positional relationship between the protrusion 38 and the upper link pin 34, in this embodiment, the two are linked. The upper pin 34 is not necessarily located on the center line of the back operation lever 33. This is a result of considering the smoothness of operation of the lever 33.

As described above, according to the present invention, since the back operation lever also serves as a complete release lever, there is no need to provide a special complete release lever, and the number of parts can be reduced. Therefore,
Accordingly, it can be expected that there will be fewer failures and that maintenance will be easier, and costs can be reduced. Further, the winch according to the present invention simply includes two levers, a forward operating lever and a backward operating lever, as levers that can be operated from the outside. On the other hand, if, for example, a complete release lever is provided in addition to a forward operation lever and a back operation lever, three levers with different functions will be provided in a manner that can be operated from the outside. .
Therefore, for inexperienced workers, these three
It is difficult to use the two levers properly, and erroneous operation is likely to occur. In particular, it is extremely dangerous to operate the complete release lever with the intention of operating the forward operating lever or the backward operating lever, as this may lead to a serious accident.
Such an accident may also occur if the full release lever is rotated accidentally rather than manually. However, according to this invention, the back operation lever also serves as a complete release lever, and the normal operation of the back operation lever does not result in a complete release state. Not only is the lever not in a released state, but only two levers need to be operated, so the operation can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the present invention.
FIG. 2 is a front view of the winch shown in FIG. 1 with the front housing removed. FIG. 3 is a right side view of the winch of FIG. 1. Figure 4 shows line 4 in Figure 2.
It is a sectional view showing a cross section along line A-4A in the left half and a cross section along line 4B-4B in the right half. FIG. 5 is an illustrative front view illustrating the operational interlocking structure of the clamp claw and the rotation link. FIG. 6 is a sectional view taken along the line - in FIG. 5. FIG. 7 schematically shows a state in which the wire rope is pulled out. FIG. 8 schematically shows the state immediately before the clamp claw is fully released. FIG. 9 schematically shows a state in which the clamp claw is fully released. In the figure, 1 is a case, 2 is a wire rope,
8 is a forward operation lever, 9 is a forward operation fork, 1
0 is the center pin, 15 is the first set of clamp claws, 16
are the second set of clamp claws, 17 is the upper claw, 18 is the lower claw, 19 is the first rotation link, 21 is the second rotation link, 23 is the front side plate, 24 is the rear side plate, and 25 is the rear side plate. Lower lever pin, 26 is lower link pin, 27 is upper lever pin, 28 is lower link pin, 33 is back operation lever, 34 is upper link pin, 35 is back lever pin, 36 is back link, 37 is upper link pin, 38 is a protruding end, 39
is a latch.

Claims (1)

[Scope of Claims] 1. A case 1, first and second rotation links 19, 21 disposed in the case 1, and a wire rope that is interlocked with the rotation of each of the rotation links 19, 21, respectively. A first set and a second set of clamp claws 15 and 16 perform the gripping and releasing operations of 2.
a forward operating lever 8 for forward operation rotatably supported by a shaft 10 fixedly positioned with respect to the case 1; a first side plate 23 operatively connecting a position 25 on one side and one end 26 of the first rotation link 19; and a position on the forward operating lever 8 on the other side of the shaft 10. 27 and one end 28 of the second rotation link 21 in an interlocking manner; a back operation lever 33 connected to the forward operation lever; and a back link 36 that operably connects the intermediate portion 35 of the back operation lever 33 and the other end 37 of the first rotation link 19; 8 or by rotating the back operation lever 33, the first and second rotation links 19, 21 are rotated in opposite directions, and the wire rope 2 is repeatedly gripped and released. is moved forward or backward, and the wire rope 2 is fully released when both the first and second rotation links 19, 21 are rotated in the same direction, the back operation The lever 33 is not supported by a pivot shaft fixed to the case 1, but is held by the back link 36 and the second rotation link 21, The operating lever 33 has a protrusion 38 formed at the same position as the intermediate portion 35 that is connected to the back link 36, and the first and second rotation links 19, 21 are in the completely released state. In order to maintain the fully released state by maintaining the posture of the back operating lever 33 and the back link 36 that are assumed at a certain time, the lever engages with the protrusion 38 when in the fully released state. The latch 39 is connected to the case 1.
A winch characterized by being installed in.