JP3109988U - winch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winch in which a part including a drum around which a rope is wound can be easily assembled while ensuring grasping and winding / rewinding of a rope.
SOLUTION: A winch that has a drive drum 1 that is driven to rotate and in which a wire rope 15 is wound around the periphery of the drive drum 1, and a peripheral groove 21 is formed between the drive drum 1 and the periphery. In order to accommodate the wire rope in the peripheral groove, an annular driven drum 2 that is arranged in common with the driving drum 1 and an urging force that presses the driven drum 2 against the driving drum 1 side is generated. One disc spring 3 is provided.
[Selection] Figure 2

Description

  The present invention relates to a winch, and more particularly to a winch in which a rope grasping mechanism is configured to have a simple structure and high reliability.

  In winches that drive towed objects, a rope grasping mechanism for inserting and grasping the rope plays an important role from the viewpoint of ensuring safety. That is, when the rope is not sufficiently grasped, the winch cannot perform firm traction drive. For this reason, many proposals have been made for a rope grasping mechanism and a winch including the rope grasping mechanism.

For example, an example is disclosed in which two drive drums are arranged one above the other and the rope is circulated on the peripheral surface of the drive drum above the figure 8. A groove is provided on the peripheral surface of the drive drum, and the rope is accommodated in the groove. In order to prevent slippage between the rope and the groove, one side wall of the groove is formed by an annular body called a movable driven drum, and the driven drum is constituted by a plurality of coil springs arranged along the periphery of the driving drum. And the rope is pressed against the peripheral edge of the drive drum constituting the other side wall (see, for example, Patent Document 1). In addition to the plurality of coil springs, a structure is also disclosed in which the driven drum is interposed by a plurality of plate springs whose roots are fixed with bolts, and the wire is pressed against the other side wall.
JP 51-141958 A

  In the structure in which the rope is pressed against the side wall of the peripheral portion of the drive drum with the driven drum interposed, if a plurality of coil springs or leaf springs are used as the member for generating the pressing force, the assembly of the winch is very difficult. It becomes difficult. In particular, the adjustment of the spring force required for holding the rope must be adjusted for each individual spring. Further, when an urging force is applied to the driven drum using a plurality of discretely arranged springs as described above, a concentrated load acts on the driven drum, causing the wavy deformation in the driven drum itself, and further rotational driving. As a result, repeated waviness deformation occurs, so that it is necessary to pay sufficient attention to fatigue failure of the driven drum.

  An object of the present invention is to provide a winch in which a part including a drum around which a rope is wound can be easily assembled while ensuring grasping and winding / rewinding of the rope.

  The winch of the present invention is a winch that has a drive drum that is rotationally driven, and a rope is wound around the periphery of the drive drum. The winch is formed with a peripheral groove portion between the peripheral portion of the drive drum and an annular driven drum arranged in common with the drive drum so as to accommodate the rope in the peripheral groove portion, And at least one disc spring that generates a biasing force that presses the drum toward the drive drum.

  With the above configuration, the driven drum can be pressed against the drive drum around the entire circumference of the disc spring, and the rope can be efficiently pressed against the periphery of the drive drum, ensuring a reliable grip between the drive drum, the driven drum, and the rope. can do. In this case, the holding force by the spring force of the disc spring can be achieved by adjusting a shim inserted in one place. Further, when wear occurs on the driving drum and the driven drum, the holding force can be easily restored to the initial value by removing a shim having a thickness corresponding to the worn amount.

  Further, since the driven drum is pressed around the whole circumference of the disc spring, the conventional concentrated load is changed to the distributed load, and the bending stress acting on the driven drum itself is smaller than that in the conventional concentrated load.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a winch 10 according to an embodiment of the present invention. In FIG. 1, the wire rope 15 passes through the rope guide 16 and the guide pipe 11 on the entrance side of the winch 10 and surrounds the outer periphery of the drum guide plate 13 while being guided by the insertion / discharge guide plate 12 and the guide sheave 8. It is wound around the peripheral edge of the driven drum. The wire rope 15 exiting the winch 10 from the guide sheave 8 is pushed out of the right side of the winch. The wire rope 15 is not wound around a portion above the drive drum between the guide sheaves 8, and the gap roller 6 is partially overlapped with the drive roller when viewed in a plan view. Located so that.

  2 is a view taken in the direction of arrows II-II in FIG. A part of the guide plate 14 and the gap roller 6 above the guide sheave 8 is removed to show the structure of the guide sheave 8. In FIG. 2, the drive drum 1 is rotationally driven by an electric motor 25. The drive drum 1 has an L-shaped cut at the peripheral edge, and a peripheral groove 21 for accommodating the wire rope 15 is formed between the drive drum 1 and the driven drum 2. Naturally, the bottom of the peripheral groove 21 is constituted by the bottom of the L-shaped notch of the peripheral edge of the drive drum 1, but the outer opening end of the peripheral groove 21 is covered by a drum guide plate 13 which is a separate member. In other words, the drum guide plate 13 forms a ceiling. Thus, since the ceiling portion is formed by the drum guide plate 13, there is no possibility that the wire rope 15 jumps out of the peripheral groove portion 21 to the outside.

  The driven drum 2 can maintain a predetermined distance between the driven drum 2 and the driving drum 1 at a portion where the gap roller 6 is sandwiched between the driven drum 2 and the driven drum 1. In other parts, the driven drum 2 directly contacts the wire rope 15 and presses the wire rope 15 against the drive drum 1. The pressing force is generated by the disc spring 3. The disc spring 3 shares an axis with the drive drum 1 and the driven drum 2. The disc spring 3 is disposed between the disc spring presser 5 with the shim 4 interposed therebetween and the driven drum 2, and generates a biasing force according to the axial length of the space in which the disc spring 3 is disposed.

  FIG. 3 is a diagram showing a positional relationship among the drive drum 1, the driven drum 2, the disc spring 3, and the drum guide plate 13 in a state where the wire rope 15 is not accommodated in the peripheral groove 21. Since the peripheral groove 21 does not contain anything that resists the urging force of the disc spring 3, the driven drum 2 enters the peripheral groove 21 to narrow the peripheral groove 21.

  On the other hand, in FIG. 4, the wire rope 15 is accommodated in the peripheral groove portion 21, so that the driven drum 2 is pushed back in the direction away from the side wall of the peripheral groove portion 21 from the position shown in FIG. Is wide. Accordingly, the disc spring 3 is also compressed at a reduced height, and generates a biasing force that presses the wire rope 15 and the driven drum 2 toward the drive drum 1.

  Next, the operation | work which introduces the wire rope 15 to the said winch 10 first is demonstrated. First, the wire rope 15 is inserted from the rope guide 16, and the tip of the wire rope 15 is guided through the guide pipe 11, the guide sheave 8, the gap roller 6, and the insertion / discharge guide plate 12, and the driving drum 1 and the driven drum 2 To reach the peripheral groove 21 formed by Next, the driving drum 1 and the driven drum 2 are rotated to guide the drum guide plate 13 so that the tip of the wire rope 15 is sandwiched between the driving drum 1 and the driven drum 2 (periphery groove portion 21). Move. When the wire rope 15 is sandwiched, the driven drum 2 moves along the axial direction so as to move away from the drive drum 1 while compressing and deforming the disc spring 3 as described above. The tip of the wire rope 15 that has been rotated while being sandwiched is guided by the insertion / discharge guide plate 12 and goes out of the peripheral groove 21. The tip end portion of the wire rope 15 coming out of the peripheral groove 21 is guided by the guide pipe 11 or the guide plate 14 (changed to the guide pipe or guide plate depending on the type of winch) and pushed out of the winch.

  According to the winch in the embodiment of the present invention, the driven drum can be pressed to the driving drum side all around the disc spring, and the wire rope is efficiently pressed to the peripheral portion of the driving drum, and the driving drum, the driven drum, and the rope A reliable rope grasp can be realized. In this case, the holding force by the spring force of the disc spring can be achieved by adjusting a shim inserted in one place. Further, when wear occurs on the driving drum and the driven drum, the holding force can be easily restored to the initial value by removing a shim having a thickness corresponding to the worn amount. Further, since the driven drum is pressed around the whole circumference of the disc spring, the conventional concentrated load is changed to the distributed load, and the bending stress acting on the driven drum itself is smaller than that in the conventional concentrated load.

  In the winch shown in FIG. 1, the wire rope inserted from the upper part of the winch circulates around the drive drum and then is pushed out of the winch from the right side, but may be pushed upward as shown in FIG. 5. Moreover, in FIG. 1 and FIG. 5, you may reverse the entrance and exit of a wire rope. Moreover, although the case where there was only one disc spring was illustrated in the said embodiment, the thing which piled up two or more disc springs in the same direction may be sufficient, and the opposite direction may be piled up back to back.

  By using the winch of the present invention, it is easy to assemble the part including the drum around which the wire rope is wound while ensuring the grasping and winding / rewinding of the wire rope. It is expected to be widely used in many towing devices including the gondola.

It is a front view of the winch in an embodiment of the invention. It is an II-II arrow line view of FIG. It is a figure which shows the positional relationship of a drive drum, a driven drum, and a disc spring before a wire rope is penetrated. It is a figure which shows the positional relationship of the drive drum of the state in which the wire rope was inserted and wound around the drive drum, a driven drum, and a disc spring. It is a front view of the winch of another embodiment of the present invention.

Explanation of symbols

  1 drive drum, 2 driven drum, 3 disc spring, 4 shim, 5 disc spring retainer, 6 clearance roller, 8 guide sheave, 10 winch, 11 guide pipe, 12 insertion / discharge guide plate, 13 drum guide plate, 14 guide Plate, 16 rope guide, 15 wire rope, 21 peripheral groove, 25 electric motor.

Claims (3)

A winch having a drive drum that is driven to rotate, and a rope wound around the periphery of the drive drum,
An annular driven drum arranged in common with the drive drum so as to form a peripheral groove between the peripheral part of the drive drum and accommodate the rope in the peripheral groove;
A winch comprising: at least one disc spring that generates a biasing force that pushes the driven drum toward the drive drum.   2. The winch according to claim 1, further comprising a clearance roller in which a roller portion is positioned so as to be sandwiched between the driving drum peripheral portion and the driven drum at a portion of the peripheral groove portion where the rope is not wound around the peripheral groove portion. .   The winch of Claim 1 or 2 with which the guide plate for drums is arrange | positioned so that the opening edge of the outer side of the said peripheral groove part may be covered.

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