Extension metal wheel fixture and extension metal wheel fixing method

Abstract

To provide an extension metal wheel fixture and an extension metal wheel fixing method capable of easily fixing an extension metal wheel to a target located at a high place from the ground.SOLUTION: An extension metal wheel fixture 1 comprises: an operation rod 2 provided with a cable hook 22 hookable to an existing communication cable and fitted to the existing communication cable by hooking the cable hook 22 to the existing communication table; a pulley 3 supported by the operation rod 2; an operation rope 4 supported so as to be movable in the state of being hooked to the pulley 3 and enabling an operator on the ground to operate both ends; and a suspension fixture 5 that is supported by the operation rope 4 and that removably suspends the extension metal wheel fitted to the existing communication table.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 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 rope support means supported by the operating rod; an operating rope that is movably supported in a state of being hung on the rope support means and both ends of which can be operated by an operator on the ground; A hanging tool that is supported by the operating rope and that detachably hangs a wire pulley that is 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 object to be mounted at a high altitude. [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] 1 is a perspective view showing a configuration of a hanging jig 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, which are used to extend 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 that has a hook that can be hooked onto an existing communication cable and can pull in the new communication cable while it is 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 or she stretches out his or her 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 so as to be wound onto 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 device 1 according to the embodiment will be described with reference to Fig. 3. The wire pulley attachment device 1 includes an operating rod 2 that is detachably attached to an existing communication cable, a pulley 3 provided at the tip of the operating rod 2, an operating rope 4 that is hung on the pulley 3 and supported so as to be movable as the pulley 3 rotates, and both ends of which can be operated by a worker on the ground, and a hanging jig 5 that is attached to the operating rope 4 and removably hangs the wire pulley.

[0014] 4, the operating rod 2 includes a long main body 21, a cable hook 22 provided at the tip of the main body 21 and capable of being hooked onto an existing communication cable, and a pulley hook 23 provided at the tip of the main body 21 and capable of hooking onto a ring member of the pulley 3. 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 hung on and detached from an existing communication cable. The cable hook 22 is, for example, a J-shaped hook (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 configured to be able to support the load from the wire pulley mounting tool 1 even if the worker releases it while it is hung on the existing communication cable.

[0017] The pulley hook 23 is, for example, an L-shaped hook that extends from the side surface of the tip of the main body 21 in the radial direction of the main body 21 and bends upward midway. The cable hook 22 and the pulley hook 23 are made of a rigid material that does not easily deform, such as a metal material.

[0018] The pulley 3 is an example of a rope support means supported at the tip of the operating rod 2 and supporting the operating rope 4 so that it can move with the rotation of the pulley 3 while the operating rope 4 is hung on it. The pulley 3 includes a roller 31 that rolls on the operating rope 4, and a support member 32 that is supported by the operating rod 2 and rotatably supports the roller 31. The support member 32 is a U-shaped member that rotatably supports the roller 31 at both ends. The support member 32 is provided with a ring member 33 on which the pulley hook 23 of the operating rod 2 is hung. The roller 31 has a recess with an arc-shaped cross section on the circumferential surface thereof that guides the operating rope 4.

[0019] Returning to FIG. 3, the operating rope 4 is set so as to hang down from both sides of the pulley 3, and both ends are held by the worker's hands. By pulling one end downward, the wire-drawing car attached to the other end can be lifted. When pulling one end of the operating rope 4 downward, a slight tension is simultaneously applied to the other end of the operating rope 4, so that the pulley 3 can be rotated around the longitudinal axis of the operating rod 2, and the horizontal position of the hanging jig 5 can be adjusted. The operating rope 4 is a rope, for example, a hoisting rope, that has a tensile strength sufficient to lift the wire-drawing car using the pulley 3 and can be deformed along the circumferential surface of the roller 31 of the pulley 3. The operating rope 4 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.

[0020] The hanging jig 5 is a jig that is detachably attached to the operation rope 4 and detachably hangs the wire pulling car. The hanging jig 5 is detachably attached to the other end side of the operation rope 4 hanging down from the pulley 3, and is configured to slidably receive one end side of the operation rope 4.

[0021] As shown in Fig. 5, the hanging jig 5 includes an attachment means 51 detachably attached to the other end of the operating rope 4 hanging from the pulley 3, a wire pulley support means 52 provided on the attachment means 51, extending in a direction away from the attachment means 51, and detachably supporting the wire pulley in a hooked state, and a tilt control means 53 provided on the wire pulley support means 52 and engaging with one end of the operating rope 4 hanging from the pulley 3 to control the tilt of the wire pulley support means. The hanging jig 5 is formed of, for example, plastic or metal material. Note that in Fig. 5, a part of the operating rope 4 is omitted from the illustration in order to make it easier to understand the shape of the attachment means 51.

[0022] The attachment means 51 is attached to the operating rope 4, and is a means for transmitting the load of the wire pulley to the operating rope 4. The attachment means 51 is formed of a spiral member having a diameter smaller than that of the operating rope 4. When the operating rope 4 is wound around the spiral member, the operating rope 4 is fixed to the attachment means 51 by the frictional force generated between the spiral attachment means 51 and the operating rope 4, and the attachment means 51 does not shift relative to the operating rope 4 even when it is subjected to the load of the wire pulley. Therefore, the two can be fixed by the simple task of winding the operating rope 4 around the spiral attachment means 51, eliminating the need for the time-consuming task of tying the operating rope 4.

[0023] The wire pulling wheel support means 52 includes a rod-shaped member 52a provided at the tip of the attachment means 51 and extending in a direction away from the attachment means 51, and a Y-shaped hook 52b provided at the tip side of the rod-shaped member 52a and capable of hooking a ring member of the wire pulling wheel shown in Fig. 6. The rod-shaped member 52a is arranged, for example, in a straight line with respect to the central axis of the spiral member of the attachment means 51. The rod-shaped member 52a is formed to a length such that when the side of the operation rope 4 to which the hanging jig 5 is attached is pulled downward with the cable hook 22 of the operation rod 2 hung on the existing communication cable, the hook of the wire pulling wheel hung on the Y-shaped hook 52b reaches above the existing communication cable.

[0024] The Y-shaped hook 52b is hooked onto the ring member of the wire pulley cart, and can lift the wire pulley cart with the movement of the operating rope 4. The wire pulley cart 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 arrows in Fig. 6. Since the wire pulley cart has the above configuration, when the Y-shaped hook 52b is hung, the tip of the arm separates from the tip of the hook, and when the Y-shaped hook 52b is removed from the ring member, the tip of the arm returns to a state of contact with the tip of the hook.

[0025] Returning to Fig. 5, the tilt regulating means 53 includes an arm 53a provided on the wire pulley support means 52 and extending in a direction intersecting with the wire pulley support means 52, and a guide means 53b provided on the arm 53a opposite the wire pulley support means 52 and movably guiding one end of the operating rope 4 hanging down from the pulley 3. The wire pulley support means 52 and the arm 53a may be formed integrally with each other.

[0026] The arm 53a extends, for example, in a direction perpendicular to the rod-shaped member 52a of the wire pulley support means 52, and the wire pulley support means 52 and the arm 53a are formed as an L-shaped member. This allows one end side and the other end side of the operating rope 4 hanging down from the pulley 3 to be separated from each other. In consideration of the operability of the operating rope 4, it is preferable that the arm 53a is longer than the diameter of the roller 31 of the pulley 3.

[0027] The guide means 53b is configured so that the operating rope 4 hanging down from the pulley 3 can be inserted therethrough. The guide means 53b also prevents the operating rope 4 operated by an operator from getting tangled in the operating rod 2. The guide means 53b is formed, for example, of a spiral member having a diameter larger than that of the operating rope 4. The movement of the operating rope 4 can be restricted by inserting the operating rope 4 into the space surrounded by the spiral guide means 53b. It is preferable that the central axis of the spiral mounting means 51 and the central axis of the spiral guide means 53b are parallel to each other. The above is the configuration of the wire pulling bar mounting device 1.

[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 4 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 if it is placed on the wire pulley car rollers, it will be difficult to lift the wire pulley car.

[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 to hook the cable hook 22 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 hooking the cable hook 22 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 4 hangs down from both sides of the pulley 3.

[0031] Next, the wire pulley car is set on the hanging jig 5 of the wire pulley car mounting tool 1 on the ground (step S3). Specifically, the other end of the operating rope 4 is pulled downward to lower the position of the Y-shaped hook 52b of the hanging jig 5, and in this state, a worker on the ground hooks the Y-shaped hook 52b onto the ring member of the wire pulley car shown in FIG. 6. With the Y-shaped hook 52b hooked onto 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 onto it.

[0032] Next, the wire puller car is lifted while operating both ends of the operating rope 4 with both hands, and the wire puller car is attached to the existing communication cable (step S4). Specifically, as shown in FIG. 3, the wire puller car can be lifted by pulling one end of the operating rope 4 downward. At this time, tension is also applied to the other end of the operating rope 4, and the operating rope 4 is rotated around the longitudinal axis of the operating rod 2 to adjust the horizontal position of the wire puller car, and the hook of the wire puller car is hooked on the existing communication cable. After that, when the Y-shaped hook 52b is removed from the ring member of the wire puller car, the weight of the wire puller car shown in FIG. 6 is released, so that 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 puller car is stably held so as not to fall off 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. 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 pulley 3 supported by the operating rod 2, the operating rope 4 supported while hung on the pulley 3 so as to be movable as the pulley 3 rotates and both ends of which can be operated by a worker on the ground, and the hanging jig 5 supported by the operating rope 4 and for removably hanging the wire pulley attached to the existing communication cable. Therefore, the wire pulley attachment tool 1 can be used to easily attach the wire pulley to an existing communication cable from the ground, reducing the time and labor required for the work of extending a new 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 cable hook 22 of the operating rod 2 is provided on the tip surface of the main body 21, but the present invention is not limited to this. For example, the cable hook 22 may be provided at a position away from the tip surface of the main body 21.

[0037] In relation to the above modification, the cable hook 22 may be provided at a position away from the tip surface of the operating rod 2 so that the tip of the operating rod 2 is positioned above the existing communication cable when the operating rod 2 is attached to the existing communication cable. In this case, if the hook of the wire pulley can be lifted above the existing communication cable, the hanging jig 5 may be replaced with a hook (for example, an S-shaped hook).

[0038] In the above embodiment, the pulley 3 is detachably hooked onto the pulley hook 23 of the operating rod 2, but the present invention is not limited to this. For example, an openable and closable O-shaped hook may be provided on the operating rod 2, and the ring member 33 of the pulley 3 may be attached by opening the O-shaped hook. Also, a U-bolt may be attached to the operating rod 2, and the ring member 33 of the pulley 3 may be attached to the U-bolt via a carabiner.

[0039] In the above embodiment, the rope support means is the pulley 3, but the present invention is not limited to this. For example, the rope support means may be a means for sliding the operating rope 4 while it is hung thereon, and may be, for example, an L-shaped hook on which the operating rope 4 can be hung.

[0040] In the above embodiment, the hanging jig 5 is provided with the tilt control means 53, but the present invention is not limited to this. For example, when the weight of the wire pulley to be attached is relatively light, the tilt control means 53 may be omitted from the hanging jig 5.

[0041] In the above embodiment, the attachment means 51 is a spiral member, but the present invention is not limited to this. For example, the attachment means 51 may be a rod-shaped member with through holes at both ends, and the operation rope 4 may be passed through each through hole and tied so that the operation rope 4 can be attached to the attachment means 51. The operation rope 4 may also be secured to the rod-shaped member of the attachment means 51 with a clip.

[0042] In the above embodiment, the guide means 53b is a spiral member, but the present invention is not limited to this. For example, the guide means 53b may be a cylindrical member through which the operating rope 4 is inserted so as to be freely movable.

[0043] 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.

[0044] 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.

[0045] 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]

[0046] 1. Wire drawbar mounting equipment 2 Control stick 22 Cable hook 23 Pulley Hook 3 Pulley 31 Roller 4 Operating rope 5 Hanging jig 51 Mounting means 52 Wire extension wheel support means 53 Tilt control means 53a Arm 53b Guide 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 rope support means supported by the operating rod; an operating rope that is movably supported in a state where it is hung on the rope support means and both ends of which can be operated by an operator on the ground; A hanging tool that is supported by the operating rope and that detachably hangs a wire pulley that is to be attached to the attachment target; A wire pulling bar mounting device.

2. The hanging jig is An attachment means that is detachably attached to one side of the operating rope hanging down from the rope support means; a wire pulley support means provided on the attachment means, the attachment means extending upward when attached to the operating rope, and supporting the wire pulley in a hooked state; Equipped with 2. The wire pulley mounting tool according to claim 1.

3. the hanging jig is provided on the wire pulling car support means and includes a tilt regulating means for guiding the other end of the operation rope hanging down from the rope support means to regulate the tilt of the wire pulling car support means; 3. The wire pulley mounting tool according to claim 2.

4. The tilt restriction means is an arm provided on the wire pulling bar support means and extending in a direction intersecting the wire pulling bar support means; and a guide means provided at the tip of the arm for guiding the other end of the operation rope hanging down from the rope support means. The wire pulley mounting tool according to claim 3.

5. The rope support means is a pulley equipped with a roller capable of rolling on the operating rope. The wire pulley mounting tool according to any one of claims 1 to 4.

6. The hook and the pulley hook are provided at the tip of the operating rod, The pulley is provided with a ring member to which the pulley hook is hooked. The wire pulley mounting tool according to claim 5.

7. A wire pulley attachment method performed by an operator using the wire pulley attachment tool according to any one of claims 1 to 4, Attaching the operating rod to the attachment target; a step of hanging the wire pulley on the hanging jig; a step of pulling one of the operation ropes while holding both ends of the operation rope to lift the wire pulley and attach it to the attachment target; A wire pulley mounting method including:

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