Wire drawbar mounting device and wire drawbar mounting method

Abstract

To provide a wire drawbar mounting device and a wire drawbar mounting method that can easily attach a wire drawbar from the ground to an object to be attached at a high place.SOLUTION: A wire pulley mounting device 1 includes an operating rod 2 which is provided with a cable hook 22 which can be hooked onto an existing communication cable installed between utility poles, and which is attached to the existing communication cable by hooking the cable hook 22 onto the existing communication cable, a support member 3 which is supported by the operating rod 2 and extends in the radial direction of the operating rod 2 such that both ends thereof are away from the operating rod 2, a pair of pulleys 4 supported at both ends of the support member 3, an operating rope 5 which is supported movably in a state of being hung from one pulley 4 provided on the support member 3 to the other pulley 4, and both ends of which can be operated by a worker on the ground, and hanging means 6 which is attached to the operating rope 5 and which removably hangs the wire pulley to be attached to the existing communication cable.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wire pulley attachment tool and a wire pulley attachment method. [Background technology]

[0002] A method for extending a new communication cable along an existing communication cable involves attaching multiple wire-drawing metal cars to the existing communication cable at intervals, and then pulling the new communication cable onto these wire-drawing metal cars. In this method, workers usually climb utility poles to attach the wire-drawing metal cars to the existing communication cable, but because working at heights is a burden for workers, a method for attaching the wire-drawing metal cars from the ground is being considered. For example, Patent Document 1 discloses a method for attaching the wire-drawing metal cars to the existing communication cable by lifting a pole fitting with a wire-drawing metal car attached to the tip of an operating rod. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Microfilm of Utility Model Application No. 58-188926 (Utility Model Application No. 60-96913) Summary of the Invention [Problem to be solved by the invention]

[0004] In the method of Patent Document 1, the worker lifts the pole fitting with the wire pulley attached by hand, so the bending moment caused by the weight of the wire pulley, which is a heavy object, is applied to the worker's hands, which places a burden on the worker. This problem exists not only when attaching a wire pulley to an existing communication cable installed on a utility pole, but also when attaching a wire pulley to other attachment targets at high altitudes.

[0005] The present invention has been made against this background, and aims to provide a wire pulley mounting tool and a wire pulley mounting method that enable a wire pulley to be easily attached from the ground to an object located at a high altitude. [Means for solving the problem]

[0006] In order to achieve the above object, the wire pulley attachment device according to the present invention comprises: a hook that can be attached to a mounting target at a high place is provided, and the operating rod is attached to the mounting target by hooking the hook onto the mounting target; A support member supported by the operating rod and extending in a radial direction of the operating rod so that both ends of the support member are spaced apart from the operating rod; A pair of rope support means supported at both ends of the support member; an operating rope that is supported movably in a state in which it is hung from one of the rope support means provided on the support member to the other rope support means, and both ends of which can be operated by an operator on the ground; A hanging means is attached to the operating rope and detachably hangs a wire pulley to be attached to the attachment target; Equipped with. Effect of the Invention

[0007] According to the present invention, it is possible to provide a wire pulley mounting tool and a wire pulley mounting method that enable a wire pulley to be easily mounted from the ground to an attachment target located at a high place. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing the state of attaching a wire pulley to an existing communication cable using a wire pulley mounting tool according to an embodiment of the present invention. FIG. [Diagram 2] 1 is a diagram showing the state of a wire-drawing operation of a newly installed communication cable using a wire-drawing metal car mounting device according to an embodiment of the present invention. FIG. [Diagram 3] FIG. 1 is a front view showing a configuration of a wire pulley mounting fixture according to an embodiment of the present invention. [Figure 4] FIG. 2 is an enlarged side view of a portion of the configuration of the wire pulley mounting fixture according to the embodiment of the present invention. [Diagram 5] FIG. 2 is a perspective view showing a configuration of a support member according to an embodiment of the present invention. [Figure 6] 1 is a perspective view showing the configuration of a wire pulley that is suspended by a wire pulley mounting fixture according to an embodiment of the present invention; [Figure 7] 4 is a flowchart showing the flow of a wire pulley attachment method using a wire pulley attachment tool according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a wire pulley attachment device and a wire pulley attachment method according to an embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, the same or equivalent parts are given the same reference numerals. Hereinafter, the case where a communication cable is used as the cable, which is installed between utility poles, will be described as an example.

[0010] The wire pulley attachment device according to the embodiment is a device for attaching wire pulleys, used for extending a new communication cable between utility poles, to an existing communication cable already installed between the utility poles. The wire pulley is a metal pulley equipped with a hook that can be hooked onto an existing communication cable, and capable of pulling in the new communication cable while suspended from the existing communication cable by the hook. An existing communication cable already installed between utility poles is an example of an attachment target located at a high place. In the embodiment, the term "high place" is not limited to a place that is 2 meters or more above the ground, but also includes a place that is so high that a worker on the ground cannot reach it even if he stretches out his hand.

[0011] As shown in FIG. 1, the wire pulley car mounting tool 1 is operated by an operator while attached to an existing communication cable that is strung between utility poles, and is a tool for lifting the wire pulley car to be attached to the existing communication cable. The operator operates the wire pulley car mounting tool 1 to attach the wire pulley car to the existing communication cable. When attaching the wire pulley car to the existing communication cable, a towing rope is passed between the roller of the wire pulley car and the support member, and the towing rope is lifted together with the wire pulley car. When the attachment of the wire pulley car at one position on the existing communication cable is completed, the wire pulley car mounting tool 1 is removed from the existing communication cable, and the wire pulley car mounting tool 1 is attached at the next position. By repeating this operation, multiple wire pulley cars are arranged at intervals on the existing communication cable.

[0012] Once all the wire-drawing cars have been installed, the end of the towing rope placed on the wire-drawing car is connected to the end of the new communication cable on the ground as shown in Figure 2, and in this state the towing rope is pulled by winding it up on a drum. This causes the new communication cable to be dragged toward the wire-drawing car, and the new communication cable is drawn along the existing communication cable. When the end of the new communication cable reaches the target utility pole, the new communication cable and the towing rope are separated from each other, and the new communication cable is erected on the utility pole. This completes the drawing of the new communication cable.

[0013] Next, the configuration of the wire pulley attachment tool 1 according to the embodiment will be described with reference to Fig. 3. The wire pulley attachment tool 1 includes an operating rod 2 that is detachably attached to an existing communication cable, a support member 3 that is supported at the tip of the operating rod 2 and extends in the radial direction of the operating rod 2 so that both ends thereof are separated from the operating rod 2, three pulleys 4 supported by the support member 3, an operating rope 5 that is hung in order on the three pulleys 4 supported by the support member 3 and supported so as to be movable with the rotation of each pulley 4, both ends of which can be operated by an operator on the ground, and a suspending means 6 that is attached to the operating rope 5 and suspends the wire pulley to be attached to the existing communication cable in a detachable manner. The radial direction of the operating rod 2 does not necessarily need to be perpendicular to the longitudinal direction of the operating rod 2, and may be inclined with respect to a line perpendicular to the longitudinal axis of the operating rod 2.

[0014] 4, the operating rod 2 includes a long main body 21 and a cable hook 22 that is provided on a side surface away from the tip surface of the main body 21 and can be hooked onto an existing communication cable. The operating rod 2 can be detachably attached to the existing communication cable by hooking the cable hook 22 onto the existing communication cable.

[0015] The main body 21 is formed in a shape that can be held by the hand of an operator, for example, a circular cross section, and is lifted by the hand of an operator toward the existing communication cable. The main body 21 is formed of a lightweight material, for example, an electrically insulating plastic. The main body 21 may be configured to be extendable and retractable in the longitudinal direction, and a handle that can be held by an operator may be provided at the base end of the main body 21.

[0016] The cable hook 22 is a hook that can be attached to and detached from an existing communication cable. The cable hook 22 is, for example, a J-shaped hook that extends from the tip surface of the main body 21 toward the axial direction of the main body 21. The cable hook 22 is provided at a position away from the tip surface of the operating rod 2 so that the support member 3 is positioned above the existing communication cable when the cable hook 22 is attached to the existing communication cable. The cable hook 22 is provided at a position 10 cm to 30 cm away from the tip surface of the operating rod 2, for example.

[0017] The cable hook 22 is configured to be capable of independently supporting the load from the wire pulley mounting tool 1 even if the worker releases it while it is hung on the existing communication cable. The cable hook 22 is made of a rigid material that does not easily deform, such as a metal material.

[0018] As shown in Fig. 5, the support member 3 is supported at the tip of the operating rod 2 and supports three pulleys 4 around which the same operating rope 5 is hung in sequence. Specifically, the support member 3 supports two pulleys 4 facing each other, and one pulley 4 that supports the operating rope 5 extending from one of the two opposing pulleys 4 to the other so that the rope ascends to a peak midway and then descends from the peak.

[0019] The support member 3 includes an arm portion 31 that extends in the radial direction of the operating rod 2 and supports separate pulleys 4 at both ends remote from the operating rod 2, an extension portion 32 that extends from the middle portion of the arm portion 31 in the longitudinal direction of the operating rod 2 and supports the pulley 4 at its tip portion, and a connection portion 33 that extends from the middle portion of the arm portion 31 in the longitudinal direction of the operating rod 2 to the opposite side to the extension portion 32 and is connected to the tip portion of the operating rod 2. The pulley 4 provided at the tip portion of the extension portion 32 is positioned higher than the two pulleys provided at both ends of the arm portion 31.

[0020] The arm portion 31 includes a first plate portion 31a and a second plate portion 31b that sandwiches the pulley 4 together with the first plate portion 31a, and the extension portion 32 includes a first plate portion 32a and a second plate portion 32b that sandwiches the pulley 4 together with the first plate portion 32a. Since the first plate portions 31a, 32a and the second plate portions 31b, 32b sandwich each pulley 4, each pulley 4 is stably held by the support member 3.

[0021] A first plate portion 32a and a connection portion 33 of the extension portion 32 are connected to the first plate portion 31a of the arm portion 31 so as to be perpendicular to the first plate portion 31a, and a second plate portion 32b of the extension portion 32 is connected to the second plate portion 31b of the arm portion 31 so as to be perpendicular to the first plate portion 32a. The first plate portions 31a, 32a and the connection portion 33 may be formed integrally, and the second plate portions 31b, 32b may be formed integrally.

[0022] The connecting portion 33 is, for example, an L-shaped member formed by bending a plate portion. One end of the L-shaped member is fixed to the tip surface of the operating rod 2, and the other end is connected to the first plate portion 31a of the arm portion 31. For example, the two can be fixed by passing a bolt through a through hole provided in the L-shaped member and tightening it into a female screw hole provided in the tip surface of the operating rod 2.

[0023] The pulley 4 is an example of a rope support means that movably supports the operating rope 5 with the operating rope 5 hung on it. Each pulley 4 rotates with the operating rope 5 hung on it, and is equipped with a roller that rolls relative to the operating rope 5, and a support member that rotatably supports the roller. The support member is a U-shaped member that rotatably supports the roller at both ends. The peripheral surface of the roller of the pulley 4 is provided with a recess with an arc-shaped cross section that guides the operating rope 5.

[0024] Returning to FIG. 3, the operating rope 5 is set on three pulleys 4 supported on both ends of the arm portion 31 of the support member 3 and on the tip of the extension portion 32. Specifically, the operating rope 5 is hung from the pulley 4 provided on one end of the arm portion 31 of the support member 3, via the pulley 4 provided on the tip of the extension portion 32, toward the pulley 4 provided on the other end of the arm portion 31. Therefore, both ends of the operating rope 5 hang down from a pair of pulleys 4 supported on both ends of the arm portion 31 of the support member 3. By holding both ends of the operating rope 5 with both hands and pulling one end downward, the wire pulling car supported on the other end can be lifted.

[0025] The operating rope 5 is a rope that, when set on the support member 3, is held at both ends by the left and right hands of an operator, and can be used to lift the wire-drawing car attached to the other end by pulling one end downward. When pulling one end of the operating rope 5 downward, a slight tension is simultaneously applied to the other end of the operating rope 5, thereby rotating the support member 3 around the longitudinal axis of the operating rod 2, thereby adjusting the horizontal position of the hanging means 6. The operating rope 5 is a rope, for example, a hoisting rope, that has a tensile strength sufficient to lift the wire-drawing car using the pulley 4 and can be deformed along the circumferential surface of the roller of the pulley 4. The operating rope 5 includes not only a cord-like member made of twisted fibers or metal wires, but also a cord-like member made of multiple members connected together, such as a chain made of linked rings.

[0026] The suspending means 6 is attached to the operating rope 5 and is a means for detachably suspending the wire pulley. The suspending means 6 is, for example, an S-shaped hook. As shown in FIG. 6, the wire pulley includes a roller that rolls on the towing rope and the newly installed communication cable, a support member that rotatably supports the roller at both ends, a hook that is provided on the upper side of the support member and hooked onto the existing communication cable, and an arm that is rotatably supported on the base end of the hook via a rotating shaft and opens and closes with respect to the tip of the hook as shown by the arrow in FIG. 6. Since the wire pulley includes the above configuration, when it is suspended by the suspending means 6, the tip of the arm separates from the tip of the hook, and when the suspending means 6 is removed from the ring member, the tip of the arm returns to a state of contact with the tip of the hook. The above is the configuration of the wire pulling bar mounting device 1.

[0027] Since the wire pulley mounting device 1 has the above-mentioned configuration, when the cable hook 22 of the control rod 2 is hooked onto the existing communication cable, the support member 3 is positioned above the existing communication cable. This allows the wire pulley to be pulled up above the existing communication cable, facilitating the operation of hooking the wire pulley onto the existing communication cable. In addition, since the pair of pulleys 4 are positioned apart from each other in the horizontal direction, the horizontal position of the wire pulley can be easily adjusted by rotating the control rod 2 around an axis extending in the longitudinal direction.

[0028] Next, a flow of a wire pulley attachment method carried out by an operator using the wire pulley attachment tool 1 according to the embodiment will be described with reference to FIG.

[0029] First, a towing rope for towing a new communication cable is set on the wire pulley car (step S1). As shown in Fig. 1, the towing rope is separate from the operating rope 5 constituting the wire pulley car mounting device 1, and is connected to the new communication cable and used to tow the new communication cable and place it on the wire pulley car rollers. The reason why the new communication cable is not placed on the wire pulley car rollers from the beginning is that the new communication cable is heavy, and it would be difficult to lift the wire pulley car while it is placed on the wire pulley car rollers.

[0030] Next, the wire pulley car mounting tool 1 is attached to the existing communication cable (step S2). Specifically, the operating rod 2 of the wire pulley car mounting tool 1 is lifted and the cable hook 22 is hooked onto the existing communication cable. At this time, since the wire pulley car mounting tool 1 does not have a wire pulley car attached, the worker can easily attach the wire pulley car mounting tool 1 to the existing communication cable with ease. After the cable hook 22 is hooked onto the existing communication cable, the worker releases the operating rod 2. As a result, the wire pulley car mounting tool 1 is hung from the existing communication cable, and the operating rope 5 hangs down from both sides of the pulley 4.

[0031] Next, the wire pulley car is set on the hanging means 6 of the wire pulley car mounting device 1 on the ground (step S3). Specifically, when the other end of the operating rope 5 is pulled downward, the S-hook, which is the hanging means 6, also moves downward together with it. In this state, a worker on the ground hooks the S-hook to the ring member of the wire pulley car shown in FIG. 6. With the S-hook hooked to the ring member, the weight of the wire pulley car causes the tip of the arm to rotate upward relative to the tip of the hook, and the tip of the arm moves away from the tip of the hook. This releases the hook, allowing the existing communication cable to be hooked.

[0032] Next, the wire pulley car is lifted while operating both ends of the operating rope 5 with both hands, and the wire pulley car is attached to the existing communication cable line (step S4). Specifically, as shown in FIG. 3, the wire pulley car can be lifted by pulling one end of the operating rope 5 downward. At this time, tension is also applied to the other end of the operating rope 5, and the operating rope 5 is rotated around the longitudinal axis of the operating rod 2 to adjust the horizontal position of the wire pulley car and hook the hook of the wire pulley car to the existing communication cable. Then, the S-hook, which is the hanging means 6, is removed from the ring member of the wire pulley car. The S-hook can be removed from the ring member of the wire pulley car by swinging the operating rope 5. When the S-hook is released, the weight of the wire pulley car shown in FIG. 6 is released, so the tip of the arm rotates downward with respect to the tip of the hook, and the tip of the arm comes into contact with the tip of the hook. This closes the hook, and the wire pulley car is stably held so as not to fall from the existing communication cable.

[0033] Next, the wire pulley mounting tool 1 is removed from the existing communication cable (step S5), and all steps are completed. After that, the steps S1 to S5 are repeated while shifting the mounting position for each wire pulley to be attached to the existing communication cable, and all target wire pulleys are attached to the existing communication cable from the ground. The above is the procedure for installing the wire pulley.

[0034] As described above, the wire pulley attachment tool 1 according to the embodiment includes the operating rod 2 provided with the cable hook 22 capable of being hooked onto an existing communication cable, the support member 3 supported by the operating rod 2 and extending in the radial direction of the operating rod 2 so that both ends thereof are separated from the operating rod 2, a pair of pulleys 4 supported at both ends of the support member 3, the operating rope 5 supported so as to be movable with the rotation of the pulley 4 while being hung from one pulley 4 to the other pulley 4 and both ends of which can be operated by a worker on the ground, and the hanging means 6 attached to the operating rope 5 and for detachably hanging the wire pulley to be attached to the existing communication cable. Therefore, the wire pulley attachment tool 1 can be used to easily attach the wire pulley to the existing communication cable from the ground, thereby reducing the time and labor required for the wire pulley to be attached to the existing communication cable.

[0035] The present invention is not limited to the above-described embodiment, and the following modifications are possible.

[0036] (Modification) In the above embodiment, the connection portion 33 of the support member 3 is connected to the operation rod 2, but the present invention is not limited to this. For example, the arm portion 31 of the support member 3 may be connected to the operation rod 2.

[0037] In the above embodiment, an L-shaped member is used as the connection portion 33 of the support member 3, and a bolt is passed through a through hole provided in the L-shaped member and fastened to a female screw hole provided in the tip surface of the operating rod 2 to fix the two, but the present invention is not limited to this. For example, a bolt joined to the bottom surface of the L-shaped member may be configured to be fastened to a female screw hole provided in the tip surface of the operating rod 2. Also, a bolt joined so as to extend from the tip surface of the operating rod 2 may be configured to be fastened to a female screw hole of a tubular member joined to the bottom surface of the L-shaped member.

[0038] In the above embodiment, each pulley 4 is sandwiched between the first plate portions 31a, 32a and the second plate portions 31b, 32b, but the present invention is not limited to this. For example, each pulley 4 may be supported on only one side by the first plate portions 31a, 32a.

[0039] In the above embodiment, the arm portion 31 of the support member 3 is formed in a straight line, but the present invention is not limited to this. For example, the arm portion 31 of the support member 3 may be bent so that both ends face upward around the operating rod 2.

[0040] In the above embodiment, three pulleys 4 are supported by both ends of the arm portion 31 of the support member 3 and the tip end of the extension portion 32, but the present invention is not limited to this. For example, the extension portion 32 of the support member 3 may be omitted, and two pulleys 4 may be supported by both ends of the arm portion 31 of the support member 3. Also, two pulleys 4 may be arranged side by side at the tip end of the extension portion 32, and the operating rope 5 may be supported by a total of four pulleys 4.

[0041] In the above embodiment, the support member 3 includes the arm portion 31, the extension portion 32, and the connection portion 33, but the present invention is not limited to this. For example, the support member 3 may be configured as a pair of plate-shaped members that sandwich the three pulleys 4 therebetween.

[0042] In the above embodiment, the rope support means is the pulley 4, but the present invention is not limited to this. For example, the rope support means may be a means for sliding the operating rope 5 while it is hung thereon, and may be, for example, an L-shaped hook or an O-shaped hook on which the operating rope 5 can be hung.

[0043] In the above embodiment, the suspending means 6 is an S-hook, but the present invention is not limited to this. The suspending means 6 may have any shape, for example, a J-hook, as long as it can detachably suspend the ring member of the wire pulley.

[0044] In the above embodiment, the wire pulley is attached to an existing communication cable, but the present invention is not limited to this. The object to which the wire pulley is attached is not limited to an existing communication cable, and it may be attached to, for example, a utility pole or its attachment. The attachment to the utility pole may be, for example, a step bolt or a wire fitting. Furthermore, when there is no existing communication cable between the utility poles, a temporary suspension wire may be temporarily erected between the utility poles, and the wire pulley may be attached to this temporary suspension wire.

[0045] In the above embodiment, the object of the wire-extending work is a communication cable, but the present invention is not limited to this. For example, the object of the wire-extending work may be an electric wire, which is an example of a cable.

[0046] The above-mentioned embodiments are merely examples, and the present invention is not limited to these, and various embodiments are possible without departing from the spirit of the invention described in the claims. The components described in the embodiments and modifications can be freely combined. In addition, inventions equivalent to the inventions described in the claims are also included in the present invention. [Explanation of symbols]

[0047] 1. Wire drawbar mounting equipment 2 Control rod 22 Cable hook 3 Supporting member 31 Arm section 32 Extension part 4 Pulley 5 Operating rope 6 Hanging means

Claims

1. A hook is provided that can be attached to a mounting target at a high place, and the operating rod is attached to the mounting target by hooking the hook onto the mounting target; A support member supported by the operating rod and extending in a radial direction of the operating rod so that both ends of the support member are spaced apart from the operating rod; A pair of rope support means supported at both ends of the support member; an operating rope that is supported movably in a state in which it is hung from one of the rope support means provided on the support member to the other rope support means, and both ends of which can be operated by an operator on the ground; A hanging means is attached to the operating rope and detachably hangs a wire pulley to be attached to the attachment target; A wire pulling bar mounting device equipped with a wire pulling bar.

2. The hook is provided at a position away from a tip surface of the operating rod so that the support member is disposed above the attachment target in a state in which the hook is hung on the attachment target.

2. The wire pulley mounting tool according to claim 1.

3. The support member is provided with an additional rope support means for supporting the operation rope extending from one of the rope support means to the other rope support means so that the operation rope ascends to a peak and descends from the peak.

3. The wire pulley mounting tool according to claim 1 or 2.

4. The support member includes an arm portion supported by the operating rod and extending in a radial direction of the operating rod so as to have both ends separated from the operating rod, and an extension portion connected to the arm portion and extending in a longitudinal direction of the operating rod so as to be separated from the operating rod, The rope support means is provided at both ends of the arm portion and at the tip end of the extension portion. The wire pulley mounting tool according to claim 3.

5. The rope support means is a pulley having a roller that rolls against the operating rope.

3. The wire pulley mounting tool according to claim 1 or 2.

6. A wire pulley attachment method performed by an operator using the wire pulley attachment tool according to claim 1 or 2, Attaching the operating rod to the attachment target; a step of hanging the wire pulley on the hanging means; a step of lifting the wire pulley and attaching it to the attachment target by pulling the side of the operation rope opposite to the side where the hanging means is supported, while holding both ends of the operation rope; A wire pulley mounting method including:

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