Cable pulling device and cable passage method using the same

Abstract

To reduce a load of an operation for drawing a cable to piping.SOLUTION: A cable pulling device comprises: a cable support part 2 which supports a cable 100 in a state of being movable in a lengthwise direction of the cable 100; a cable holding part 3 which intermittently holds the cable 100 supported by the cable support part 2; and a cable pulling part 4 which pulls the cable 100 in a state of being held by the cable holding part 3 in one direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cable pulling device and a cable wiring method using the same. [Background technology]

[0002] BACKGROUND ART Conventionally, work of passing cables through the inside of piping (so-called wire-passing work) has been carried out (see Patent Documents 1 and 2 below). This piping generally has the function of protecting the cables.

[0003] In cable installation work, workers are stationed at the cable inlet and outlet sides, and the inlet and outlet sides work together to insert and extract the cable into the pipe. However, this work requires physical strength and places a heavy burden on the workers.

[0004] Wire pulling work, in particular, can be dangerous in some locations, as it often requires work in places with poor footing and limited working space. Furthermore, pulling out the wires is a particularly physically demanding task. Meanwhile, the workforce at construction sites is aging, leaving few workers to handle tasks that place a heavy burden on workers.

[0005] The technology of Patent Document 1 below is a proposal for making it easier to grasp the cable length, and is not thought to contribute to reducing the burden of the cable installation work itself.

[0006] Furthermore, the technology of Patent Document 2 below is expected to reduce the burden on workers by using a robot, but the equipment and maintenance costs tend to be high. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Utility Model Registration No. 3215870 [Patent Document 2] Japanese Patent Publication No. 2022-186144 Summary of the Invention [Problem to be solved by the invention]

[0008] According to the research of the inventors, it was found that the burden on workers during wire-laying work is greater on the pull-out side than on the pay-out side, and that if the workload on the pull-out side can be reduced, the labor required for the entire wire-laying work can be greatly reduced.

[0009] The present invention was made based on this finding, and the main object of the present invention is to provide a technology that can reduce the burden of the entire wire installation work by assisting the work of pulling out the wire, in particular, during the wire installation work. [Means for solving the problem]

[0010] The present invention can be expressed as the inventions described in the following items.

[0011] (Item 1) A cable pulling device for pulling a cable into a pipe, a cable support portion that supports the cable in a state in which the cable can move in a length direction of the cable; a cable gripping portion that intermittently grips the cable supported by the cable support portion; a cable pulling unit that pulls the cable in one direction while the cable is held by the cable holding unit; A cable traction device comprising:

[0012] (Item 2) the cable gripping portion has a pair of gripping bodies that are movable toward and away from each other by a link mechanism and grip the cable when they are close to each other; the cable pulling unit has a rotating unit and a linear motion unit that reciprocates in accordance with the rotation of the rotating unit, The linear motion unit is attached to the link mechanism, and is configured to drive the link mechanism during forward movement to separate the pair of gripping bodies and release the grip of the cable by the pair of gripping bodies, and to drive the link mechanism during backward movement to bring the pair of gripping bodies closer to each other, and pull the cable in the one direction while gripping the cable by the pair of gripping bodies. Item 1. The cable traction device according to item 1.

[0013] (Item 3) It also has a power source, the power source is configured to transmit power to the rotating part to rotate the rotating part in at least one direction, The power source is detachably attached to the rotating part. Item 2. The cable traction device according to item 2.

[0014] (Item 4) A cable wiring method using the cable pulling device according to item 1 or 2, With the cable disposed inside the piping, the cable is intermittently pulled by the cable pulling device disposed on the outlet side of the piping, and the cable is fed from the inlet side of the piping into the inside of the piping in accordance with the timing of the pulling by the cable pulling device, thereby pulling the cable into the inside of the piping. Cable routing method. [Effects of the Invention]

[0015] According to the technology of the present invention, by assisting the work on the pulling side of the wire installation work, it is possible to reduce the load of the entire wire installation work. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic perspective view of a cable pulling device according to an embodiment of the present invention; [Figure 2] FIG. 2 is an explanatory diagram showing a main part of the cable pulling device of FIG. [Figure 3] 2 is an explanatory diagram for explaining a cable pulling method using the cable pulling device of FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] A cable pulling device (hereinafter sometimes referred to as "pulling device" or "device") according to one embodiment of the present invention will be described below with reference to the accompanying drawings. Note that the accompanying drawings are all schematic illustrations, and the dimensional ratios and scales are not accurate.

[0018] (Configuration of the cable pulling device of this embodiment) The cable pulling device 1 of this embodiment is for pulling a cable 100 into a pipe (see FIG. 1). This pulling device 1 mainly comprises a cable support unit 2 that supports the cable 100 in a state where the cable can move in the length direction of the cable, a cable gripping unit 3 that intermittently grips the cable 100 supported by the cable support unit 2, and a cable pulling unit 4 that pulls the cable 100 in one direction (leftward in FIG. 1) while being gripped by the cable gripping unit 3. Furthermore, the pulling device 1 of this embodiment has a power source 5.

[0019] (cable support part) The cable support part 2 has a support part main body 21, a guide member 22, a shaft 23, and a support body 24.

[0020] The support body 21 is adapted to be placed at an appropriate installation position such as on the floor, and has a shape that extends upward.

[0021] The guide member 22 is attached to the support body 21. The cable 100 can be inserted inside the guide member 22, which supports the cable 100 in a state where it can move in the length direction, and keeps the movement path of the cable 100 at a predetermined position.

[0022] The shaft 23 is attached to the support body 21 and is arranged to extend in one direction (to the right in FIG. 1). A gripping body 32 (described later) of the cable gripping part 3 is slidably attached to the shaft 23.

[0023] The support body 24 is formed in a generally plate-like shape and is attached to the tip of the shaft 23. A guide hole 25 is formed in the support body 24, penetrating it in the thickness direction. The cable 100 can be inserted into the guide hole 25, which makes it possible to maintain the movement path of the cable 100 in a predetermined position.

[0024] (Cable gripping part) The cable gripping unit 3 has a link mechanism 31 and a pair of gripping bodies 32 and 33 that can move closer and farther apart by the link mechanism 31 and grip the cable 100 when they move closer together. Furthermore, the cable gripping unit 3 of this embodiment has a shaft 34 and a movable block 35.

[0025] The link mechanism 31 has link members 311 and 312 and rotary shafts 313 and 314. Intermediate portions of the link members 311 and 312 are supported by the rotary shafts 313 and 314 so as to be rotatable in forward and reverse directions. The rotary shafts 313 and 314 are attached to a movable block 35. One ends of the link members 311 and 312 are attached to the gripping body 33 so as to be rotatable in forward and reverse directions. The other ends of the link members 311 and 312 are attached to a linear motion member 422 (described later) of the cable pulling unit 4 so as to be rotatable in forward and reverse directions.

[0026] The shaft 34 is disposed parallel to the shaft 23, and one end of the shaft 34 is attached to the support body 21, and the other end of the shaft 34 is attached to the support body 24.

[0027] The movable block 35 is attached to the gripping body 32. The movable block 35 is attached to the shaft 34 so as to be slidable along the shaft 34.

[0028] (Cable pulling section) The cable pulling unit 4 has a rotating unit 41 and a linear moving unit 42 that reciprocates as the rotating unit 41 rotates.

[0029] The rotating part 41 has a driving gear 411 and a driven gear 412, both of which are attached to the support part main body 21 via a rotation shaft. The driving gear 411 is rotated by the power source 5. The driven gear 412 is in mesh with the driving gear 411, and is driven by the driving gear 411 to rotate.

[0030] The linear motion unit 42 is attached to the link mechanism 31 and drives the link mechanism 31. Specifically, the linear motion unit 42 of this embodiment has a rod 421 and a linear motion member 422.

[0031] One end of the rod 421 is rotatably attached to the driven gear 412. The other end of the rod 421 is attached to a linear motion member 422 so as to be rotatable in forward and reverse directions.

[0032] As described above, the other ends of the link members 311 and 312 are attached to the linear motion member 422 so as to be rotatable in forward and reverse directions.

[0033] With this configuration, the cable pulling unit 4 of this embodiment drives the link mechanism 31 during forward movement to separate the pair of gripping bodies 32, 33, thereby releasing the grip of the cable 100 by the pair of gripping bodies 32, 33, and drives the link mechanism 31 during backward movement to bring the pair of gripping bodies 32, 33 closer to each other, thereby allowing the pair of gripping bodies 32, 33 to grip the cable 100, thereby pulling the cable 100 in one direction. The detailed operation of the cable pulling unit 4 will be described later.

[0034] (power source) The power source 5 is configured to transmit power to the drive gear 411 of the rotating part 41, thereby rotating the drive gear 411 in at least one direction. The power source 5 is detachably attached to the drive gear 411. In this embodiment, for example, an electric wrench can be used as the power source 5. In this case, the rotating shaft (not shown) of the electric wrench is connected to the drive gear 411 via an appropriate jig (not shown), and the drive gear 411 can be rotated by the driving force of the electric wrench. Furthermore, the support part main body 21 in this embodiment has a holding part (not shown) that holds the power source 5 connected to the drive gear 411 in a predetermined position.

[0035] (Wire installation method using the traction device of this embodiment) Next, a method for pulling a cable using the above-described traction device will be described with further reference to Fig. 3. In the following example, the operation of pulling (that is, pulling) a cable 100 into a pipe 200 will be described.

[0036] First, in this embodiment, it is assumed that one end of the cable 100 is arranged on the outlet side of the pipe 200, and the other end of the cable 100 is arranged on the inlet side of the pipe 200. As shown in the example of FIG. 3, the work of passing the cable 100 through the pipe 200 can be performed in a conventional manner. Also, in this embodiment, it is assumed that in an initial state, the power source 5 is detached from the drive gear 411 of the cable support part 2.

[0037] In this embodiment, the end of the cable 100 arranged on the outlet side of the pipe 200 is passed through the guide hole 25 of the cable support part 2 and the guide member 22 in that order. This allows the cable 100 to be attached to the cable pulling device 1. In this state, the cable 100 is arranged between the pair of gripping bodies 32 and 33 (see FIG. 1).

[0038] Next, in this embodiment, the power source 5 is attached to the support body 21, and the rotation shaft of the power source 5 is connected to the drive gear 411. Then, the power source 5 is started, and the drive gear 411 is rotated in one direction (for example, counterclockwise in FIG. 1). This causes the drive gear 411 to rotate the driven gear 412, and the driven gear 412 causes the linearly moving member 422 to reciprocate via the rod 421. In this specification, movement to the right in FIG. 1 is referred to as forward movement, and movement in the opposite direction is referred to as return movement.

[0039] 1, when the linear moving member 422 moves forward, the pair of grippers 32 and 33 are separated from each other by the operation of the link mechanism 31, and the linear moving member 422 moves forward in this state. Therefore, the linear moving member 422 can move forward without interfering with the cable 100.

[0040] When linearly moving member 422 moves back, link members 311 and 312 of link mechanism 31 rotate clockwise in Figures 1 and 2, causing gripping body 33 to rise and clamp cable 100 between gripping body 32 and gripping body 33 (see Figure 2). Note that in Figure 2, cable 100 is not shown, and the position of cable 100 is indicated schematically by a thick arrow.

[0041] When the linear moving member 422 moves further backward, the gripping body 33 cannot rise any further, and as a result of this backward movement, the gripping bodies 32 and 33 move along the shafts 23 and 34. This allows the cable 100, which is sandwiched between the gripping body 32 and the gripping body 33, to move leftward in FIGS. 1 and 2. When the linear moving member 422 reaches the bottom dead center and then moves forward, the pair of gripping bodies 32 and 33 are separated by the operation of the link mechanism 31, as described above, and the linear moving member 422 moves forward in this state. Thereafter, the same operation is repeated.

[0042] In this manner, in this embodiment, the cable pulling device 1 can intermittently pull the cable 100 into the piping 200 using power.

[0043] In addition, at this time, the cable 100 is intermittently pulled by a cable pulling device 1 arranged on the outlet side of the piping 200, and the worker 300 feeds the cable 100 from the inlet side of the piping 200 into the inside of the piping 200 in accordance with the timing of the intermittent pulling by the cable pulling device 1, thereby enabling the cable 100 to be efficiently pulled into the inside of the piping 200.

[0044] Therefore, the cable pulling device 1 of this embodiment can reduce the burden of the entire wire pulling work by assisting the pulling-out work, especially the pulling-out work. In addition, since the pulling-out work can be mechanized, there is also the advantage that the wire pulling work, which normally requires two or more people, can be done by one person.

[0045] After the cable pulling operation is completed, the cable pulling device 1 is appropriately removed from the cable 100.

[0046] In this embodiment, the power source 5 used can be attached or detached to the cable pulling device 1 as needed, which has the advantage of reducing the weight and size of the cable pulling device 1 itself, thereby reducing storage and maintenance costs. If a commercially available electric wrench is used as the power source 5, it is expected that the cost of the power source 5 can also be reduced.

[0047] The above-described embodiment is merely an example and does not represent essential components of the present invention. The configuration of each part is not limited to the above, as long as the gist of the present invention can be achieved. [Explanation of symbols]

[0048] 1 Cable traction device 2 Cable support 21 Support body 22 Guide member 23 Shaft 24 Support 25 Guide hole 3 Cable grip 31 Link mechanism 311·312 Link members 313·314 Rotating shaft 32·33 Grip body 34 Shaft 35 Movable Block 4 Cable pulling section 41 Rotating part 411 Drive Gear 412 Driven gear 42 Linear motion section 421 Rod 422 Linear motion components 5 Power source 100 Cable 200 Piping 300 workers

Claims

1. A cable pulling device for pulling a cable into a pipe, a cable support portion that supports the cable in a state in which the cable can move in a length direction of the cable; a cable gripping portion that intermittently grips the cable supported by the cable support portion; a cable pulling unit that pulls the cable in one direction while the cable is held by the cable holding unit; A cable traction device comprising:

2. the cable gripping portion has a pair of gripping bodies that are movable toward and away from each other by a link mechanism and grip the cable when they are close to each other; the cable pulling unit has a rotating unit and a linear motion unit that reciprocates in accordance with the rotation of the rotating unit, The linear motion unit is attached to the link mechanism, and is configured to drive the link mechanism during forward movement to separate the pair of gripping bodies and release the grip of the cable by the pair of gripping bodies, and to drive the link mechanism during backward movement to bring the pair of gripping bodies closer to each other, and pull the cable in the one direction while gripping the cable by the pair of gripping bodies. The cable pulling device of claim 1 .

3. It also has a power source, the power source is configured to transmit power to the rotating part to rotate the rotating part in at least one direction, The power source is detachably attached to the rotating part.

3. The cable pulling device of claim 2.

4. A cable wiring method using the cable pulling device according to claim 1 or 2, With the cable disposed inside the piping, the cable is intermittently pulled by the cable pulling device disposed on the outlet side of the piping, and the cable is fed from the inlet side of the piping into the inside of the piping in accordance with the timing of the pulling by the cable pulling device, thereby pulling the cable into the inside of the piping. Cable routing method.

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