JP6967200B2 - Pulley entanglement prevention device and pulley - Google Patents

Description

The present invention relates to a pulley entanglement prevention device and a pulley attached to a pulley on which a wire rope is applied.

In the construction and maintenance of transmission towers, metal pulleys (gold pulleys) are frequently used together with wire ropes as a device for pulling materials and tools from the ground surface to high places. If a worker touches such a gold car while the cord ring is rotating, it may cause a serious disaster such as involving the worker's clothes or a part of the body. .. In order to prevent such a situation, various preventive devices have been proposed by each company.

For example, in the pulley entanglement prevention device of Patent Document 1, a surrounding cylinder 30 that surrounds the rope is provided at the tip of the connecting member 40 extending from the side plate 21 of the pulley 10. Further, as another form, a configuration including a spiral member 51 that spirally surrounds the circumference of the rope is also proposed. According to Patent Document 1, these configurations can surround the rope while following the movement of the rope, and prevent the operator's fingers and the like from being caught in the pulley 11.

Further, in the safety cover for a gold wheel of Patent Document 2, a rectangular notch 2c through which a rope is passed is provided on the bottom plate 2 of the safety cover 1 shown in FIG. According to Patent Document 2, by passing the notch 2c through the rope, it is possible to prevent the fingers and the like of the worker from passing through and prevent the fingers and the like from being caught in the wheel 10.

Japanese Unexamined Patent Publication No. 2011-168386 Japanese Unexamined Patent Publication No. 2007-106517

However, in the middle of the wire rope on the gold wheel, there may be protrusions such as connecting fittings and various accessories that protrude from the diameter of the wire rope. In that case, in the configuration of surrounding the rope according to its diameter, such as the surrounding cylinder 30 and the spiral member 51 of Patent Document 1, the protrusion may be caught. Further, also in the configuration of Patent Document 2, there is a possibility that a protrusion may be caught on the edge of the notch portion 2c. If the protrusion of the wire rope is caught, it may lead to an accident such as damage to the device or disconnection of the wire rope.

In view of such a problem, it is an object of the present invention to provide a pulley entanglement prevention device and a pulley that prevent foreign matter from being caught in a rope ring while smoothly passing a wire rope.

In order to solve the above problems, a typical configuration of the pulley entanglement prevention device according to the present invention is a pulley entanglement prevention device attached to a pulley with a wire rope, which rotates on both sides of the rope ring. It is provided with a pair of arms that can be attached, a pair of side walls provided at the tips of the arms, and a plurality of beam members that are passed between the side walls and surround the wire rope, and a part of the beams among the plurality of beam members. The members are removable or openable from the side walls, and the plurality of beam members are characterized by having a curved surface that is convex toward the wire rope.

In the pulley entanglement prevention device, the wire is surrounded by the side wall and the beam member, so that the operator's fingers and the like can be suitably prevented from being entangled in the cord ring. In particular, since the beam member has a convex curved surface, even if a protrusion exists in the middle of the wire rope, the wire rope can be smoothly passed without catching the protrusion. In addition, some beam members are removable or openable from the side walls, allowing the wire rope to be easily attached to the pulley.

Among the above-mentioned plurality of beam members, those that can be opened and closed may have a hinge connected to the side wall at one end and a mooring portion that can be attached to and detached from the side wall at the other end. With this configuration, the beam member can be opened and closed, and the wire rope can be easily attached to the pulley.

The plurality of beam members include a first beam member arranged inside the wire rope extending in two directions from the cord ring, and a second beam member arranged outside the wire rope and opposite to the first beam member. , The third beam member arranged on the outside of the wire rope and closer to the cord ring than the second beam member may be included.

With the above configuration, the wire rope can be surrounded by the first beam member and the second beam member, and the clothes and hands of the worker can be suitably protected from being caught in the rope ring. Further, the third beam member can prevent clothes and hands from unexpectedly entering the gap between the side walls.

The plurality of beam members may be in the shape of a round bar. With this configuration, it becomes possible to realize a beam member in which protrusions are not easily caught.

The plurality of beam members may be round bar-shaped resin rollers. If the roller is made of resin and has appropriate elasticity, it is possible to prevent the protrusions from being caught and to protect the fingers and the like of the worker more preferably.

In order to solve the above problems, a typical configuration of a pulley according to the present invention is characterized in that a pair of pulley entrainment prevention devices are provided on both sides of a wire rope extending in two directions from a rope ring. The components corresponding to the technical idea of the entanglement prevention device described above and their description thereof can also be applied to the pulley. Therefore, the pulley can smoothly pass the wire rope on both sides of the wire rope and prevent the operator's fingers and the like from being caught in the pulley.

INDUSTRIAL APPLICABILITY According to the present invention, it becomes possible to provide a pulley entrainment prevention device and a pulley that prevent foreign matter from being caught in a rope ring while allowing the wire rope to pass smoothly.

It is a figure which shows the outline of the pulley and the entanglement prevention device for a pulley which concerns on embodiment of this invention. It is a front view and a side view of the pulley of FIG. It is a figure which shows the entanglement prevention device for a pulley. It is a figure which shows the modification of the entanglement prevention device for a car.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate explanations, and elements not directly related to the present invention are not shown. do.

FIG. 1 is a diagram showing an outline of a pulley 100 and a pulley entanglement prevention device (entanglement prevention devices 102, 104) according to an embodiment of the present invention. The entanglement prevention devices 102 and 104 are devices that protect the fingers and the like of the worker from being entangled in the pulley 100, and the pulley 100 is a wire rope 108 that extends the entanglement prevention devices 102 and 104 from the rope ring 106 in two directions. It is characterized by having a total of pairs on both sides. Hereinafter, the configurations of the entrapment prevention devices 102 and 104 will be described in detail.

Since the entanglement prevention devices 102 and 104 have the same configuration (symmetrical structure), the entanglement prevention device 102 will be mainly described below as an example. The entanglement prevention device 102 surrounds the wire rope 108 with the side walls 110a, 110b and a plurality of beam members (first beam member 114a, etc.) so that foreign matter is not caught between the wire rope 108 and the rope ring 106, and the wire. It prevents foreign matter from entering between the rope 108 and the rope ring 106.

Among the entrainment prevention devices 102, the side walls 110a and 110b and the arms 112a and 112b (see FIG. 3A) are made of metal and have a plate shape. The beam member includes one bolt 118 and a total of three beam members 114a to 114c. Each of the first beam member 114a to the third beam member 114c is a round bar-shaped resin roller in which a metal core is covered with resin.

Each beam member (first beam member 114a to third beam member 114c) has a round bar shape as described above, and has a curved surface convex toward the wire rope 108. A protrusion such as a connecting metal fitting may be present in the middle of the wire rope 108, but since each beam member has a convex curved surface, the protrusion can pass through without being caught by each beam member. As a result, in the entanglement prevention device 102, both prevention of entanglement of foreign matter in the rope ring 106 and smooth passage of the wire rope 108 are achieved.

FIG. 2 is a front view and a side view of the pulley 100 of FIG. FIG. 2A is a front view of the pulley ring 106 of the pulley 100. The entrainment prevention device 102 is rotatably attached to the shaft 116 of the cord ring 106 by an arm 112a extending from the side wall 110a. As a result, the entanglement prevention device 102 can rotate following the movement of the wire rope 108 as shown by the broken line in FIG. 2A, and the wire rope 108 can freely change its posture. Does not interfere with the movement of.

FIG. 2B is a side view of the pulley 100 and shows the entrapment prevention device 104. As shown in the beam member 115 of the entanglement prevention device 104, each of the beam members of the entanglement prevention devices 102 and 104 is in a posture orthogonal to the wire rope 108 when attached to the pulley 100, and is a worker's finger or the like. To prevent the wire from getting caught in the rope ring 106.

FIG. 3 is a diagram showing a pulley entanglement prevention device (entanglement prevention devices 102, 104). FIG. 3A is a perspective view of the pulley entanglement prevention devices 102 and 104. The entanglement prevention devices 102 and 104 have a simple structure in consideration of easy portability and attachment / detachment to / from the pulley.

A total of a pair of side walls 110a and 110b and arms 112a and 112b are provided along both sides of the cord ring 106 (see FIG. 1). The pair of arms 112a and 112b have an annular shape (annular portion 113) at one end, and are rotatably attached by fitting them on the bolts or nuts of the shaft 116 of the cord ring 106 on both sides of the cord ring 106. The pair of side walls 110a and 110b have a plate-like shape and are provided at the other ends of the arms 112a and 112b, respectively.

At least a part of the side walls 110a and 110b extends outward from the rope ring 106 (see FIG. 1) and covers both side surfaces of the wire rope 108 passing through the rope ring 106.

See FIG. 1 again. In the present embodiment, the bolt 118 and the first beam member 114a are arranged inside the wire rope 108 extending in two directions from the rope ring 106. The second beam member 114b is located outside the wire rope 108 and on the opposite side of the first beam member 114a. The third beam member 114c is located on the outside of the wire rope 108 and closer to the cable ring 106 than the second beam member 114b.

The pair of side walls 110a, 110b, the first beam member 114a, and the second beam member 114b form an entrance / exit of the wire rope 108 in the entanglement prevention device 102, surround the wire rope 108, and include clothes and hands of a worker. Protects against entanglement in the rope ring 106. The third beam member 114c fills the range between the second beam member 114b and the cord ring 106, and prevents clothes and hands from unexpectedly entering the gap of the side wall 110a.

In particular, in the entrainment prevention device 102, the first beam member 114a and the second beam member 114b are set so as to surround the wire rope 108 at a position separated from the cord ring 106 by the length of a human finger or more. As a result, when the worker's hand is stopped by the first beam member 114a and the second beam member 114b, even if the finger is inadvertently extended, the worker's hand does not reach the cord ring 106, and the cord ring 106 such as the worker's finger or the like does not reach. It becomes possible to suitably prevent the entrainment in the beam.

As described above, each beam member is a roller made of a round bar-shaped resin, and the protrusions on the wire rope 108 are less likely to be caught. Further, the resin portion is designed to generate appropriate elasticity, which also makes it possible to suitably prevent the protrusions from being caught.

Refer to FIG. 3A again. At least a part of the plurality of beam members is removable or openable / closable from the side wall so that the entanglement prevention device 102 can be easily attached to / detached from the pulley 100 (see FIG. 1) and the wire rope 108. In particular, in the present embodiment, the second beam member 114b and the third beam member 114c located outside the wire rope 108 can be opened and closed.

FIG. 3B is a diagram showing the operation of the second beam member 114b. The second beam member 114b has a hinge 120 at one end and is rotatably connected to the side wall 110b. The other end of the second beam member 114b is a mooring portion 122 that can be attached to and detached from the side wall 110a. The mooring portion 122 can be, for example, a structure that can be pulled, stretched, and returned by a spring. As a result, the mooring portion 122 can be fitted into the Dharma hole 124 (see FIG. 3A) of the side wall 110a by a simple operation of pulling and releasing, and can be easily attached and detached.

According to the above configuration, when the entanglement prevention device 102 is attached to the pulley 100 (see FIG. 1), the arm 112a is first attached to the shaft 116 of the rope ring 106, and then the second beam member 114b and the third beam member 114c are opened. Put the wire rope 108 inside and close them. As described above, the entanglement prevention device 102 has a part of the beam members that can be opened and closed, so that the wire rope 108 can be easily attached to and detached from the pulley 100. ..

If one end of each beam member is a hinge 120, the beam member does not fall off from the side walls 110a and 110b even when opened, so that there is no risk of loss. However, each beam member can be configured not only to have an opening / closing structure by a hinge 120 but also to have both ends completely removable from the side walls 110a and 110b. Further, among the plurality of beam members, only a part of the beam members arranged on one side of the wire rope 108 may be openable / closable or removable, in which case the beam members on the opposite side are on the side walls 110a and 110b. It can be in a fixed state.

Further, in the above embodiment, each beam member has a round bar shape, but has a configuration that does not rotate. However, it is also possible to configure the beam member to rotate with the passage of the wire rope 108. With this configuration, the wire rope 108 and its protrusions rotate when touched, and the wire rope 108 can be smoothly passed through.

Further, each beam member does not necessarily have to have a round bar shape, and may have a long plate shape curved in the width direction, for example. A long plate-shaped beam member can also form a curved surface that is convex toward the wire rope 108.

As described above, the entanglement prevention devices 102 and 104 preferably achieve both smooth passage of the wire rope 108 and prevention of entanglement of the fingers and the like of the worker, and can be easily attached to the pulley 100. It has become. The pulley 100 is provided with a pair of entanglement prevention devices 102 and 104 on both sides of the wire rope 108, so that the safety of the worker can be suitably ensured at the work site.

(Modification example)
The number of the above-mentioned beam members can be further increased. For example, FIG. 4 is a diagram showing a modified example of the pulley and the entanglement prevention device for the pulley. The entanglement prevention devices 202 and 204 attached to the pulley 200 shown in FIG. 4 have two additional beam members as compared with the entanglement prevention devices 102 and 104 of FIG. 1, respectively.

In the entrainment prevention device 202, an extension portion 204 extends along the wire rope 108 from the entrance / exit side of the wire rope 108 on the side wall 110a, and the fourth beam member 114d is passed to the extension portion 204. Similarly, the extension portion 206 and the fifth beam member 114e are also provided on the side wall 110b on the back side. The fourth beam member 114d and the fifth beam member 114e are installed in a direction intersecting the first beam member 114a and the second beam member 114b.

In the entanglement prevention device 202, the entrance / exit of the wire rope 108 is surrounded by a first beam member 114a, a second beam member 114b, a fourth beam member 114d, and a fifth beam member 114e in a grid pattern (frame shape). There is. Therefore, it is possible to protect the worker's clothes and hands from being caught in the rope ring 106 all around the wire rope 108. Further, since each beam member is a roller made of a round bar-shaped resin, it is possible to prevent the protrusions on the wire rope 108 from being caught.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

INDUSTRIAL APPLICABILITY The present invention can be used as a pulley entrapment prevention device and a pulley attached to a pulley on which a wire rope is applied.

100 ... Pulley, 102, 104 ... Entrainment prevention device, 106 ... Cord ring, 108 ... Wire rope, 110a, 110b ... Pair of side walls, 112a, 112b ... Pair of arms, 113 ... Annulus portion, 114a ... First beam member , 114b ... 2nd beam member, 114c ... 3rd beam member, 114d ... 4th beam member, 114e ... 5th beam member, 115 ... beam member, 116 ... wire rope shaft, 118 ... bolt, 120 ... hinge, 122 ... Mooring part, 124 ... Dharma hole, 200 ... Pulley of modified example, 202, 204 ... Entrainment prevention device of modified example, 204 ... Extension of side wall, 206 ... Extension of side wall

Claims (3)

A pulley entanglement prevention device that can be attached to a pulley with a wire rope.
A pair of arms that can be rotatably attached to both sides of the cord ring,
A pair of side walls provided at the tip of the arm,
It is provided with a plurality of beam members that are passed between the side walls and surround the wire rope.
Some of the beam members among the plurality of beam members are removable or openable / closable from the side wall.
The plurality of beam members are
The first beam member arranged inside the wire rope extending in two directions from the cord ring,
A second beam member located on the outside of the wire rope and on the opposite side of the first beam member.
Includes a third beam member that is outside the wire rope and is located closer to the cord ring than the second beam member.
A pulley entanglement prevention device, wherein the first beam member, the second beam member, and the third beam member have a curved surface that is convex toward a wire rope. The first aspect of claim 1, wherein the plurality of beam members that can be opened and closed have a hinge connected to the side wall at one end and a mooring portion that can be attached to and detached from the side wall at the other end. Entrainment prevention device for pulleys. A pulley according to claim 1 or 2 , wherein a pair of pulley entrapment prevention devices are provided on both sides of a wire rope extending in two directions from a pulley ring.

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