Wheel with entanglement prevention cover

Abstract

To provide a pulley with a catch prevention cover capable of preventing a finger from being caught and also capable of easily observing the state of a rope wheel and a rope.SOLUTION: A typical configuration of a pulley 100 with a catch prevention cover according to the present invention comprises frames 120 and 130, a rope wheel 140 pivotally supported by the frames, and catch prevention covers 200 and 250. The external form of the catch prevention cover is larger than that of the rope wheel 140 and windows 206 and 256 are provided at the positions corresponding to the external form of the rope wheel.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pulley with an anti-entanglement cover that prevents fingers from becoming entangled in the pulley on which a wire rope is attached. [Background technology]

[0002] In the construction and maintenance of electricity transmission towers, metal pulleys are often used together with wire ropes to pull materials and tools from the ground to high places. If a worker touches such a pulley while the rope is rotating, there is a risk of the worker's fingers or clothes getting caught in it, leading to a serious accident. To prevent such an incident, various companies have proposed various prevention devices.

[0003] For example, in the pulley entrapment prevention device of Patent Document 1, an encircling tube 30 that encircles the rope is provided at the end of a connecting member 40 extending from a side plate 21 of the pulley 10. As another embodiment, a configuration that includes a spiral member 51 that helically encircles the rope has also been proposed. Patent Document 1 claims that these configurations encircle the rope while following the movement of the rope, preventing the worker's fingers, etc. from becoming entangled in the pulley 11.

[0004] In addition, in the wheel safety cover of Patent Document 2, a rectangular cutout 2c through which a rope can pass is provided in the bottom plate 2 of the safety cover 1 shown in Fig. 2. Patent Document 2 claims that by passing the rope through the cutout 2c, it is possible to prevent the fingers of an operator from passing through and to prevent the fingers from getting caught in the wheel 10. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-168386 A [Patent Document 2] JP 2007-106517 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the configurations of Patent Documents 1 and 2 allow the hands to easily touch the sheaves of the pulleys, which means that if a foreign object gets on the rope during a load-lifting operation and the worker tries to remove the object carelessly by hand, there is a risk that the hand's fingers will get caught between the rope and the sheaves.

[0007] One way to prevent fingers from getting entangled is to enclose the rope ring in a cover. However, covering the rope ring with a cover makes it difficult to see the condition of the rope ring and the rope, making it difficult to detect problems such as foreign objects or metal fittings getting caught in the rope ring, or the rope falling off the rope ring.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a pulley with an anti-entanglement cover which prevents fingers from getting entangled and allows the condition of the rope and the sling to be easily observed. [Means for solving the problem]

[0009] In order to solve the above problems, a typical configuration of a pulley with an anti-entanglement cover according to the present invention comprises a frame, a rope ring journaled on the frame, and a plate-shaped anti-entanglement cover fixed to the frame along both end faces of the rope ring, the anti-entanglement cover being characterized in that its outer shape is larger than that of the rope ring and has a window provided at a position corresponding to the outer shape of the rope ring.

[0010] According to the above-mentioned configuration, since covers larger than the rope are arranged on both sides of the rope, it is possible to prevent fingers from getting entangled. Furthermore, since a window is provided at a position corresponding to the outer shape of the rope, it is possible to easily observe the condition of the rope and the rope.

[0011] The entrapment prevention cover is preferably provided with a transparent member for covering the window. The transparent member may be a flexible sheet or a hard plate. Effect of the Invention

[0012] According to the present invention, it is possible to provide a pulley with an anti-entanglement cover which prevents fingers from getting entangled and allows the condition of the rope and the sling to be easily observed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing an outline of a pulley according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing the iron wheel disassembled into the iron wheel body and the entanglement prevention cover. [Diagram 3] FIG. 13 is a diagram showing the upper frame in an open state. [Figure 4] FIG. 1 is a view of the gold wheel 100 from the rear side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific values ​​shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not shown.

[0015] Fig. 1 is a diagram showing an overview of a pulley 100 according to an embodiment of the present invention. Fig. 2 is a diagram showing the pulley 100 disassembled into a pulley body 110, a front entrapment prevention cover (hereinafter referred to as "cover 200"), and a rear entrapment prevention cover (hereinafter referred to as "cover 250"). Fig. 3 is a diagram showing the upper frame when opened. Fig. 4 is a diagram showing the pulley 100 as seen from the rear side.

[0016] 2, the pulley body 110 has a rope wheel 140 rotatably supported by a front frame 120 and a rear frame 130. The frames 120 and 130 are pillars made of plate-like members. A groove 142 is formed on the outer periphery of the rope wheel 140 for allowing the rope 260 to run. A hook 150 is attached to the upper end of the frames 120 and 130.

[0017] The front frame 120 is divided into a lower frame 122 and an upper frame 124, which are connected by a hinge 126. The hinge 126 is disposed at a position that corresponds roughly to the upper end of the rope wheel 140. A lower plate 143 is attached to the lower frame 122, and an upper plate 144 is attached to the upper frame 124. A plate 141 is attached to the rear frame 130. These plates 141, 143, and 144 are provided to prevent the rope from getting entangled around the axis of the rope wheel 140.

[0018] As shown in Figure 3, by opening the upper frame 124, the rope 260 to be hung on the rope ring 140 can be passed through. A pulley that can hang the middle part of the rope 260 by opening and closing the frame like this, instead of passing the rope 260 from one end, is called a snatch pulley. The upper frame 124 is provided with a bar 128, and the upper frame 124 is closed by passing the bar 128 through a latch 152 provided on the hook 150.

[0019] The front cover 200 and the rear cover 250 are plate-like members and are fixed to the frames 120, 128 by welding, screwing, or the like along the end faces on both sides of the rope ring 140. The front cover 200 is divided into a lower cover 202 and an upper cover 204, and the lower cover 202 is fixed to the lower frame 122, and the upper cover 204 is fixed to the upper frame 124. Therefore, as shown in Figure 3, the upper cover 204 opens and closes together with the upper frame 124.

[0020] 1 and 4, the outer shape of the covers 200, 250 is larger than the outer shape of the rope ring 140. It is preferable that the difference in size is such that when a hand is placed on the edge of the covers 200, 250, the fingers cannot reach between the rope 260 and the groove 142.

[0021] In this way, covers 200, 250 larger than the rope ring 140 are arranged on both sides of the rope ring 140, so that hands cannot easily touch the rope ring 140, and fingers can be prevented from getting entangled. Also, by providing large covers 200, 250, it is possible to make it difficult for the rope 260 to fall off the rope ring 140. Furthermore, if the covers 200, 250 were removable, they could come off during installation on site or during work, but by making them fixed, they can be used permanently.

[0022] Additionally, the covers 200, 250 are provided with windows 206, 256 at positions corresponding to the outer shape of the rope lug 140. This makes it possible to easily observe the state of the rope lug 140 and the rope 260 through the windows 206, 256, as shown in Fig. 1. Additionally, the windows 206, 256 also serve to reduce the thickness of the covers 200, 250, making it possible to reduce the weight as much as possible without impairing the strength.

[0023] Moreover, it is preferable that transparent members 206a, 256a are attached to the covers 200, 250 to cover the windows 206, 256. The transparent members may be flexible sheets such as vinyl materials, or may be hard plates such as acrylic panels. This makes it possible to prevent fingers from being inserted through the windows and getting caught without impairing visibility.

[0024] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an example. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention. [Industrial Applicability]

[0025] INDUSTRIAL APPLICABILITY The present invention can be used as a pulley with an anti-entanglement cover that prevents fingers from becoming entangled in a pulley to which a wire rope is attached. [Explanation of symbols]

[0026] 100...wheel, 110...wheel body, 120...frame, 122...lower frame, 124...upper frame, 126...hinge, 128...hook, 130...frame, 141...plate, 140...rope ring, 142...groove, 143...lower plate, 144...upper plate, 150...hook, 152...lattice bracket, 200...cover, 202...lower cover, 204...upper cover, 206...window, 206a...transparent member, 250...cover, 256...window, 256a...transparent member, 260...rope

Claims

[Claim 1] A frame, A rope ring journaled on the frame; A plate-shaped anti-entanglement cover is fixed to the frame along both end faces of the rope, The entanglement prevention cover has an outer shape larger than that of the rope ring, and is provided with an arc-shaped window corresponding to the outer shape of the rope ring, The winding wheel with an anti-entanglement cover is characterized in that the windows are provided symmetrically on both sides of the anti-entanglement cover along both sides of the rope ring and on both sides of the center of the rope ring.

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