Metal car cover

Abstract

To provide a metal wheel capable of preventing an operator clothing and the like from being entangled in a gap between a wire rope and a rope wheel of the metal wheel while reducing a work for replacing the wire rope.SOLUTION: A configuration of a metal wheel cover 100 according to the present invention is attached to a metal wheel 10 hung around by a wire rope 20. The metal wheel cover is arranged at a different angle to a shaft 10a of the metal wheel 10, and has a pair of side walls 112, 114 arranged on the front and back of the metal wheel 10. The metal wheel cover comprises two sets of arms 110a, 110b attached rotatably to the shaft 10a of the metal wheel 10, a pin 120 to connect the pair of side walls 112, 114, and a spring 130 to bias the pin 120 to the wire rope 20 by rotating the arms 110a, 110b.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a sheave cover attached to such a sheave of a wire rope.

Background Art

[0002] In power transmission line construction, a sheave is used when transporting a conveyed object to a target location, such as raising a heavy object from the ground surface to the upper part of a tower. Specifically, the sheave has a sheave wheel with a wire groove formed therein, and is freely rotatable by suspending the central axis of the sheave wheel with a suspension tool. Thereby, the wire rope is drawn in to raise the conveyed object to the target location, or the wire rope is fed out to lower the conveyed object to the target location.

[0003] During the operation of the sheave, if a worker's body or clothing (hereinafter referred to as clothing, etc.) comes into contact with the rotating sheave wheel, the clothing, etc. will be caught by the wire rope and the sheave wheel. To prevent such a situation, for example, Patent Document 1 discloses a "sheave device equipped with a safety cover". The safety cover in the sheave device of Patent Document 1 includes "an arm rotatably supported on the central axis of the sheave at a part, and an enclosure fixed to the arm and surrounding the wire wound around the sheave".

[0004] The enclosure of Patent Document 1 includes a pair of main body parts and an opening / closing piece for wire attachment / detachment that can be opened and closed with respect to the main body part, and a wire is inserted into the space formed by them. When the angle of the wire changes, the enclosure moves following the wire, and the wire is surrounded by the enclosure.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In power line construction, the frequency of changing the wire rope is very high. Then, in the pulley device of Patent Document 1, every time the wire rope is changed, the opening and closing piece must be opened and closed, and frequent labor is caused by the opening and closing operations each time. Further, in Patent Document 1, it is necessary to stop the fastener after closing the opening and closing piece. If the fastener is forgotten to be stopped, the opening and closing piece will be in the open state, and the surrounding tool will not follow the wire rope. Then, since the wire rope is in an exposed state, it becomes impossible to prevent the worker's clothes or the like from being caught in the wire rope and the pulley. In addition, if the wire rope is surrounded by a surrounding tool as in Patent Document 1, it becomes difficult for the worker to visually recognize the wire rope, so there is a concern about a decrease in workability.

[0007] In view of such problems, an object of the present invention is to provide a pulley that can reduce the labor when changing the wire rope and prevent the worker's clothes or the like from being caught between the wire rope and the pulley of the pulley.

Means for Solving the Problems

[0008] In order to solve the above problems, a typical configuration of the pulley cover according to the present invention is a pulley cover attached to the pulley to which the wire rope is applied, having a pair of side walls arranged at different angles with respect to the axis of the pulley and arranged on the front and back of the pulley, two sets of arms rotatably attached to the axis of the pulley, a pin connecting the pair of side walls, and a spring for rotating the arm to urge the pin against the wire rope.

[0009] It is preferable that the pair of side walls are provided with flanges approaching each other at an edge opposite to the spring with respect to the pin, and a gap through which the wire rope passes is formed between the opposing flanges.

Effects of the Invention

[0010] According to the present invention, it is possible to provide a sheave that can prevent the worker's clothing or the like from being caught between the wire rope and the sheave of the sheave while reducing the labor required for replacing the wire rope.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0012] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such embodiments 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 functions and configurations are denoted by the same reference numerals to omit redundant descriptions, and elements not directly related to the present invention are not shown.

[0013] FIG. 1 is an overall perspective view of the sheave 10 and the sheave cover 100 according to the present embodiment. FIG. 1(a) illustrates a state in which the sheave 10 and the sheave cover 100 are observed from obliquely above, and FIG. 1(b) illustrates a state in which the sheave 10 and the sheave cover 100 are observed from obliquely below. FIG. 2 is a front view and a side view of the sheave 10 and the sheave cover 100 according to the present embodiment. FIG. 2(a) is a front view of the sheave 10 and the sheave cover 100 according to the present embodiment, and FIG. 2(b) is a side view of the sheave 10 and the sheave cover 100 according to the present embodiment.

[0014] As shown in FIGS. 1(a) and (b), the winding wheel cover 100 of the present embodiment is attached to the winding wheel 10 to which the wire rope 20 (see FIG. 3) is applied, and covers the wire rope 20 at the portion applied to the winding wheel 10. Specifically, the winding wheel 10 includes a sheave 12 formed with a groove 12a (see FIG. 2(b)) to which the wire rope 20 is applied, and a pair of side plates 14 arranged so as to sandwich the sheave 12.

[0015] As shown in FIGS. 1 and 2, the winding wheel cover 100 of the present embodiment is composed of two sets of arms 110a and 110b. The two sets of arms 110a and 110b are arranged at different angles with respect to the axis 10a of the winding wheel 10 (strictly speaking, the axis of the sheave 12), and are rotatably attached to the axis 10a of the winding wheel 10.

[0016] The two sets of arms 110a and 110b each have a pair of side walls 112 and 114 arranged on the front and back of the winding wheel 10. The pair of side walls 112 and 114 are connected by a pin 120. A spring 130 (torsion spring) is attached to the axis 10a of the winding wheel 10, and the spring 130 is locked to the side wall 112 of the arms 110a and 110b. The spring 130 rotates the arms 110a and 110b to urge the pin 120 against the wire rope 20.

[0017] In the present embodiment, the configuration in which the spring 130 is locked to the side wall 112 on the front side in the drawing is illustrated, but the present invention is not limited thereto, and the configuration in which the spring 130 is locked to the side wall 114 on the back side in the drawing may be used. Further, in the present embodiment, the configuration in which the winding wheel cover 100 includes one spring 130 is illustrated, but the present invention is not limited thereto, and a configuration in which springs are provided on both the side wall 112 on the front side in the drawing and the side wall 114 on the back side in the drawing is also possible.

[0018] FIG. 3 is a diagram illustrating the state of the winding wheel cover 100 when the winding wheel 10 is operating. FIG. 3(a) illustrates the case where the opening angle of the wire rope 20 with respect to the axis 10a of the winding wheel 10 is α, and FIG. 3(b) illustrates the case where the opening angle of the wire rope 20 with respect to the axis 10a of the winding wheel 10 is β. The opening angles are such that “α>β”.

[0019] As shown in Fig. 3(a), when the opening angle of the wire rope 20 is α (when the opening angle is large), the pair of arms 110a and 110b are rotated in the rotation direction D1 by the biasing force of the spring 130. As a result, the pin 120 attached to the pair of arms 110a and 110b rotates in the rotation direction D2, and the pin 120 comes into contact with the wire rope 20.

[0020] As shown in Fig. 3(b), even when the opening angle of the wire rope 20 is β (when the opening angle is small), the pair of arms 110a and 110b are rotated in the rotation direction D1 by the biasing force of the spring 130. Also in this case, the pin 120 attached to the pair of arms 110a and 110b rotates in the rotation direction D2, and the pin 120 comes into contact with the wire rope 20.

[0021] That is, in the gold wheel cover 100 of the present embodiment, even when the opening angle of the wire rope 20 changes, the pair of arms 110a and 110b rotate so as to follow the wire rope 20 by the biasing force of the spring 130. And the pin 120 is biased by the biasing force of the spring 130 received via the pair of arms 110a and 110b and is always in contact with the wire rope 20. Thereby, regardless of the opening angle of the wire rope 20, the wire rope 20 is surrounded by the side walls 112 and 114 near the gold wheel 10. Therefore, it is possible to prevent the fingers, clothes, etc. of the operator from being caught between the wire rope 20 and the sheave 12 of the gold wheel 10.

[0022] Furthermore, in the gold wheel cover 100 of the present embodiment, as shown in Figs. 1(a) and (b), the pair of side walls 112 and 114 are provided with flanges 116 and 118 that approach each other at the edges on the side opposite to the spring 130 with respect to the pin 120. And a gap G through which the wire rope 20 (see Fig. 3) passes is formed between the opposing flanges 116 and 118.

[0023] According to such a configuration, the wire rope 20 can be disposed inside the pulley cover 100 through the gap G. Therefore, in the pulley cover 100 of the present embodiment, it is not necessary to attach or detach or open and close the pulley cover 100 when replacing the wire rope 20 on the pulley 10. For this reason, the labor for replacing the wire rope 20 can be reduced, and it becomes possible to improve the working efficiency. Further, since the flanges 116 and 118 are formed, contact between the wire rope 20 and the clothes of the worker or the like can be more effectively prevented, and since the wire rope 20 can be visually recognized from the gap G, the state of the wire rope 20 can be confirmed well.

[0024] Further, the pulley cover 100 according to the present invention has a simple configuration that only needs to be attached to the shaft 10a, and does not require a special structure for the pulley 10 itself. Therefore, it can be attached to an existing pulley 10 or a pulley 10 of any manufacturer.

[0025] As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. Needless to say, the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive various modification examples or correction examples within the scope described in the claims, and it is naturally understood that those also belong to the technical scope of the present invention.

Industrial Applicability

[0026] The present invention can be used as a pulley cover attached to such a pulley of a wire rope.

Explanation of Signs

[0027] 10... pulley, 10a... shaft, 12... sheave, 12a... groove, 14... side plate, 20... wire rope, 100... pulley cover, 110a... arm, 110b... arm, 112... side wall, 114... side wall, 116... flange, 118... flange, 120... pin, 130... spring

Claims

1. A sheave cover attached to such a sheave of a wire rope, comprising: a pair of side walls arranged at different angles with respect to the axis of the sheave and disposed on the front and back of the sheave, and two sets of arms rotatably attached to the axis of the sheave; a pin connecting the pair of side walls; a spring for rotating the arm to urge the pin against the wire rope; and the pair of side walls are characterized in that no other pins are provided on the side opposite to the pin urged against the wire rope with respect to the wire rope.

2. The sheave cover according to claim 1, wherein the pair of side walls are provided with flanges approaching each other at edges on the side opposite to the spring with respect to the pin, and a gap through which the wire rope passes is formed between the opposing flanges.

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