JPH0823613A - Cable cutter - Google Patents

Abstract

PURPOSE:To obtain a cable cutter which can be manufactured small at a low cost, and in which a cable can be effectively fed and a bent cable can be straightened. CONSTITUTION:At least two pairs of roller drivers comprising drive roller members 222 and driven roller members 221 disposed oppositely to the members 222 are provided, and both members are formed substantially in a bobbin shape recessed at its central part. The members 222 are extended in the rotary shaft direction of rollers and formed with a plurality of cable anti-slip grooves 111c. The cable cutter provided with the cable driver formed in this manner is disposed on a vehicle body. The driver and the cutter are hydraulically driven. The drive force of an engine to run the body is taken out to drive a driving hydraulic source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable cutter device capable of cutting a cable such as a telephone line at a desired length while paying it out.

[0002]

2. Description of the Related Art As a cable arranged on a utility pole or underground, there are a power transmission line and a telephone line for supplying electric power.
Here, in telephone lines, the number of lines that can be communicated is determined by the number of electric wires provided in one cable, so if the number of lines becomes insufficient, replace with a cable that can obtain more lines. There is a need to. When performing the cable replacement work, it is necessary to remove the conventionally arranged cable from the utility pole or pull out from the underground manhole to collect it.

These old cables are recovered by cutting them to a predetermined length and then loading them on a truck.
Here, in order to remove and cut the old cable, the cable is pulled by a winch and a worker uses a manual cutter, or a device such as a cable pulling / cutting device described in "Kaikaihei 2-88411". I used to.
Then, the worker carried the cut cable to a truck for collection.

[0004]

However, cutting the cable with a manual cutter not only puts a heavy burden on the operator, but also requires a winch for pulling the cable, resulting in poor work efficiency. There was a problem. Further, in the above cable towing and cutting apparatus, an engine unit for driving the apparatus is also required and the apparatus itself becomes large, so that a vehicle dedicated to the cable towing and cutting apparatus is required. Further, forming a plurality of protrusions like the pulling roller used in this cable pulling and cutting device increases the manufacturing cost of the pulling roller, which leads to an increase in the cost of the entire cable pulling and cutting device.

Further, in each of the above-mentioned methods, a separate truck for loading the cut cable is required, and further labor for carrying the cut cable to the truck is required, which increases working cost and working environment. There was also a problem of causing deterioration of. Furthermore, the cables laid on the utility poles and laid in the manhole are bent due to their own weight and bending of the manhole, but in each of the above methods, the cables are cut while bent, so the loading space for the cables to be recovered There was also a problem that it was not possible to load many on trucks because it was widely required.

The present invention has been made in view of the above problems, can be manufactured at a small size and at a low cost, can reliably feed out a cable, and can straighten a bent cable. It is an object of the present invention to provide a cable cutter device that can be used.

[0007]

In order to achieve the above object, the cable cutter device of the present invention has a cutter means arranged in front of the feeding means for continuously feeding the cable forward, and the feeding means. The means comprises at least two pairs of roller drives. The roller driving unit is composed of a driving roller member and a driven roller member arranged so as to face the driving roller member, and both of these roller members are formed in a substantially drum shape with a depressed central portion. In the drive roller member, a plurality of cable slip prevention grooves are formed extending in the rotation axis direction of the roller.

In the cable cutter device having such a structure, the cable is clamped by the central portion of the driving roller member and the central portion of the driven roller member which are arranged opposite to each other. Then, when the drive roller member is rotationally driven, the cable can be delivered without slipping due to the frictional force of the groove formed in the drive roller member.
Here, since at least two pairs of roller driving parts are arranged, it is possible to improve the payout force (pulling force) and the payout speed, and it is possible to straighten the bent cable.

A hydraulic pump is provided in which the cable cutter device is arranged on a freely movable vehicle body, and the feeding means and the cutter means are hydraulically driven to supply hydraulic oil to the feeding means and the cutter means. In the case where the driving force of the engine for driving the vehicle body is taken out and driven, there is no need to separately provide a driving means such as an engine for driving the hydraulic pump, so that the cable cutter device can be made smaller. It can be manufactured at low cost.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. First, the aerial work vehicle 10 provided with the cable cutter 20 according to the present invention will be described with reference to FIGS. 2 and 4. This aerial work vehicle 10 is provided with a swivel base 12 which can swivel in front of a loading platform 11a in a freely movable vehicle body 11, and a boom 13 which is configured to be extendable and retractable above the swivel base 12 to perform a hoisting motion. It is freely pivoted. A workbench 15 on which a worker can ride is attached to the tip of the boom 13 via a vertical post 14. Then, the jack device 18 is grounded to stably support the vehicle body 11, and then the swivel base 12 and the boom 13 are operated to move to an arbitrary high place for work.

The swivel operation of the swivel base 12 is performed by the swivel base 1.
2 is performed by a swing motor (not shown) provided in the boom 2, and the boom 13 is lifted, retracted, and jacked.
The grounding operation of 8 is performed by each telescopic cylinder including the undulating cylinder 19. These motors and cylinders are hydraulic actuators operated by hydraulic pressure, and their operations are controlled by controlling the supply and discharge of hydraulic oil from the hydraulic pump P. The hydraulic pump P is driven by taking out the driving force of the traveling engine E of the vehicle body 11 by the power take-off mechanism PTO. When the vehicle body 11 is running, the driving force of the engine E is transmitted to the rear wheels via the transmission TM.

A cable C is provided behind the loading platform 11a.
Cable cutter device 2 for cutting a desired length
0 is set. This cable cutter device 20
1 is composed of a base portion 20a and a cover portion 20b as shown in detail in FIG. The base unit 20 a includes a base 21 mounted on the vehicle body 11, a cable drive unit (feeding unit) 22 arranged on the base 21, a cutter unit (cutter unit) 23, and a control box 24. It consists of Also, the cover portion 20b
Is a cover main body 25 that covers the cable drive unit 22 and the like on the base 21, and four rollers (four-sided rollers) 26 arranged on the upper, lower, left and right sides of the cable insertion hole 25a opened on the side surface of the cover main body 25, 26, 26, 26.

The cable driving section 22 is composed of a driving side and a holding side of the cable C. The driving side includes a driving roller cover 226, two driving rollers 222 provided in the driving roller cover 226, the details of which are shown in FIG. 3, and two driving motors for rotationally driving these driving rollers 222. 223 and 223. The rotation shaft 223a of the drive motor 223 is inserted into the insertion hole 222b of each drive roller 222 to drive the drive roller 222 to rotate.

The drive motor 223 and a holding cylinder 224 and a cutter cylinder 2 which will be described in detail later.
Reference numeral 33 is a hydraulic motor and a hydraulic cylinder that are operated by hydraulic pressure. The hydraulic oil is supplied to these hydraulic motors and hydraulic cylinders from a hydraulic pump P that also drives the hydraulic actuators, and the hydraulic pump P and the cable cutter device are connected by an oil supply hose H. There is.

The holding side of the cable drive portion 22 is arranged at a position facing the drive side with a predetermined interval (a width wider than the outer diameter dimension of the cable C to be fed).
The two driven rollers 221 shown in FIG.
21, a driven roller cover 225 that rotatably supports the driven roller 221, a holding cylinder 224 that moves the driven roller cover 225 together with the driven roller 221 toward the drive roller 222, and an upper portion of the driven roller cover 225. The encoder 225 is provided. The encoder 225 has a structure in which one of the driven rollers 221 has an insertion hole 221b in which the rotary shaft 22 is inserted.
The rotation speed of the driven roller 221 is detected by connecting 5a.

As shown in FIG. 3, the driven roller 221 is formed in a substantially drum shape by forming an arcuate recess 221a in the middle of the cylinder, and the surface of this recess 221a is knurled. Has been done. As a result, when the cable C is sandwiched between the drive roller 222 and the drive roller 222, the details of which will be described later, and the cable C is fed, the contact area is not increased and the cable C is not slipped, and the cable C can be fed at the central position. it can. The driven roller 22
1 is made by quenching a carbon steel material such as S45C.

Further, the drive roller 222 is arranged in the vertical direction (the rotation axis direction of the drive roller 222, that is, the drive motor 22).
A plurality of cable slip prevention grooves (fin-shaped projections) 222c are formed in the direction of extension of the rotary shaft 223a of No. 3 and are formed in a substantially drum shape like the driven roller 221. As with the driven roller 221, the material of the driving roller 222 including the portion where the cable slip prevention groove 222c is formed is S4.
A material obtained by quenching a carbon steel material such as 5C is used. The materials of the driven roller 221 and the driving roller 222 are not limited to the carbon steel material as described above, but may be metal materials such as other steel materials, ceramics, synthetic resin, rubber and the like. Further, the rollers 221 and 222 may be formed by combining a plurality of these different materials.

Here, one driven roller 221 and the same one driving roller 222 arranged so as to face the driven roller 221 compose the roller driving unit described in the claims, and the above-mentioned embodiment is carried out. In the example, two pairs of roller driving units are arranged.

Next, the cutter portion 23 will be described with reference to FIG. 1 again. The cutter portion 23 has a cable insertion space 231a and a blade portion 231b.
A cutter 231 formed with an arrow, a cutter guide 232 for guiding the cutter 231 and supporting the cable C at the time of cutting the cable, and a cutter 231 with an arrow I.
The cutter cylinder 233 is slid in the I direction.

This cutter 231 is a cutter cylinder 2
33 is attached to the tip of the telescopic rod 233a. Then, the cutter cylinder 233 is reduced,
The cutter 231 is slid in the cutter guide 232 in the direction indicated by the arrow II. As a result, the cable C is sandwiched between the end surface of the cutter guide 232 and the cutter 232, and is cut by the blade portion 231b of the cutter 232. The material of the cutter 231 in this embodiment is a hollow steel material (SKC).
Is used.

Here, the operation of collecting the old telephone line arranged on the electric pole by using the cable cutter device 20 having the above-mentioned structure will be described. For convenience of explanation, the direction indicated by arrow B is set to the rear of the cable cutter device 20 in accordance with the front-rear direction (direction indicated by arrows F and B) of the high-place work 10 placed as shown in FIG. F
The direction indicated by will be described as the front.

The cable C cut by the cable cutter device 20 is a telephone line called SS cable arranged on a telephone pole. As shown in the cross section of FIG. Is provided with a core C2. Then, the operator who has boarded the workbench 15 removes the cable C on the telephone pole. Next, the operator inserts the tip of the cable C from the rear of the cable cutter device 20 (from the cable insertion hole 25a when the cover 20b is covered) between the holding side and the driving side of the cable drive unit 22. It is inserted into the space 22a and passed through the inside of the cable insertion space 231a from the front of the cable cutter device 20 (in the state where the cover portion 20b is covered, it is not shown formed on the surface opposite to the surface provided with the insertion hole 25a). Make it project (from the projecting hole).

Since the rotatable four-sided roller 26 is provided around the cable insertion hole 25a as described above, the cable C has an angle with respect to the cable insertion hole 25a so that the cable C has a right and left direction (see FIG. 2). Even when the cable C is inserted from the direction indicated by the solid line and the chain double-dashed line), the cable C can be smoothly fed without being caught in the cable insertion hole 25a. Although not shown in the figure, a four-sided roller is also provided around the protruding hole so that the cable C can be fed smoothly.

Here, in the state in which the cable C is inserted by the operator as described above, the holding cylinder 224.
Is in a contracted state, and space 2 between the presser side and the drive side
2a forms a space in which the cable C does not come into contact with the rollers 221 and 222. When the cable C is sent, the holding cylinder 224 is extended and the driven roller 221 and the drive roller 222 clamp the cable C.

The holding cylinder 224 is expanded and contracted by controlling the supply and discharge of hydraulic oil. An accumulator is provided in the oil feed pipe between the hydraulic pump P and the holding cylinder 224. Therefore, the holding cylinder 224
By stopping the expansion / contraction operation of the holding cylinder 224 in a state in which the reaction force acting on the roller reaches a predetermined reaction force, the clamping force of the cable C by the rollers 221 and 222 is adjusted to an appropriate clamping force (each of which is generated when the cable C is driven). It is possible to hold the rollers 221 and 222 while keeping the force that prevents the rollers 221 and 222 from slipping, and to change the holding force according to the shape and thickness of the cable C.

When the cable C is a cable to be removed as in this embodiment, there is no problem even if the outer periphery of the cable C is damaged. Therefore, as described above, each roller 22
Each of the rollers 1 and 222 is formed of a metal material, and the holding cylinder 224 is pressed with a large force, whereby
If the cable C is firmly sandwiched between the cables 21 and 222, and the cable slip prevention groove 222c and the knurling bite into the coating of the cable C to drive the rotation, the cable C can be more reliably delivered without slipping. You can

In the state where the cable C is held between the rollers 221, 222 as described above, the drive motor 223 is driven to move the drive roller 222 to the arrow III in FIG.
When it is rotated clockwise as indicated by, the driven roller 221 rotates counterclockwise as indicated by arrow IV, and the cable C is sent from the rear to the front as indicated by arrow I in FIG. Here, since each roller 221 and 222 is provided in two sets, the feeding force (pulling force) of the cable C becomes large, so that the cable C can be reliably fed out and the feeding speed of the cable C is also increased. You can Further, since the two sets of rollers 221 and 222 are provided, the cable C can be pulled straight. Therefore, the cable C bent by being fed from the left and right of the cable cutter 20 or bent by the own weight of the cable C when stretched on a utility pole can be straightened by straightening.

The cable C is used for the platform 11 of the aerial work vehicle 10.
Since it is collected by placing it in the space between the swivel base 12 and the cable cutter 20 in a, it is necessary to cut it into a length that can be placed in this space. Therefore, after feeding the cable C by a predetermined amount, the drive motor 223 is stopped to cut the cable C. The rotation control of the drive motor 223 is performed by controlling the operation of the control valve according to the control signal of the control box 24 and controlling the supply / discharge of the hydraulic oil.

The feed amount of the cable C is determined by the encoder 225.
Is detected by That is, the encoder 22 determines the number of rotations of the driven roller 221 when the cable C is sent.
By detecting with 5, it is possible to detect the feed amount of the cable C (the length of the cable C to be cut). Therefore, if the detection value by the encoder 225 is reset when the cable C is cut by the cutter portion 23, the length until the next cutting of the cable C can be accurately detected. Since the encoder 225 is attached to the driven roller 221, even if the drive roller 222 slips, the length of the cable C to be cut does not deviate.

The length of the cable C to be cut can be set to a desired length by the operator by the length setting function of the control box 24. Then, when it is detected by the encoder 225 that the length has been set, the encoder 225 sends a detection signal to the control box 24. The control box 24 that has received the detection signal is driven by the drive motor 22.
Stop 3 and stop feeding the cable C.

The cable C sent to the desired length has a hollow inside the cutter 231, and has a cable insertion space 23.
Since it is located inside 1a, it is cut by operating the cutter cylinder 233 to contract. The reduction operation of the cutter cylinder 233 (cutting operation of the cable C) is automatically performed when the length of the cable C reaches the length set by the length setting function of the control box 24. The cutter cylinder 233 may be configured to perform an operation, or the operator may operate the cutting switch in the control box 24 to cause the cutter cylinder 233 to perform a reduction operation.

The cable drive unit 2 constructed as described above
According to 2 and the cutter portion 23, even a so-called SS cable can be surely fed out in correct lengths and can be easily cut. Then, the cut cable C ′ can be directly placed in the cable loading space on the loading platform 11a, and
Since the cables are straight, a large number of them can be loaded on the loading platform 11a, and it is possible to easily carry out the cable recovery work without requiring a plurality of work vehicles.

In the above embodiment, two pairs of roller driving portions are provided in the cable driving portion, but the present invention is not limited to this, and two or more pairs of roller driving portions are provided. May be. Further, in the above embodiment, the driving force of the traveling engine extracted by the power take-off mechanism is used to drive the hydraulic pump, but a separate engine or the like is provided to drive the hydraulic pump. May be. Furthermore, the drive motor and each cylinder in the cable cutter are not necessarily limited to hydraulically driven ones, and other driving force such as electricity or air may be used.

Further, in the above embodiment, the case where the cable cutter device is used for the work of collecting the old cable has been described, but it is of course also used for the work of paying out the new cable wound around the cable drum or the like. be able to. In this case, the outer circumference of the cable can be prevented from being damaged by forming each roller with rubber or resin.

[0035]

As described above, the cable cutter device of the present invention is provided with at least two pairs of roller driving portions each including a driving roller member and a driven roller member arranged facing the driving roller member, Both of these roller members are formed in a substantially drum shape with a depressed central portion. The drive roller member extends in the rotation axis direction of the roller to form a plurality of cable slip prevention grooves. Then, the cable cutter device having the feeding means configured as described above is arranged on the vehicle body, and the feeding means and the cutter means are hydraulically driven to extract the driving force of the engine for traveling the vehicle body. It is configured to drive the hydraulic pump.

As a result, when the cable is extended,
The groove formed in the drive roller member can reliably feed out the cable at a high speed without slipping, and can cut the cable to a desired length after straightening the bent cable. Further, since the entire cable cutter device on the vehicle body can be downsized, it can be installed on the loading platform of the aerial work vehicle, and a wide space for loading the cables to be collected can be taken, so Cable recovery work can be performed efficiently with a work platform.

Further, since the cable can be efficiently and accurately fed in a predetermined length, and even if the cable is bent, the cable can be cut after straightening, so that many cables to be collected are loaded on the bed. It can be loaded and cable collection work can be performed efficiently. Further, since the cable formed on the drive roller member is not slippery only by forming the groove, it can be manufactured at a low cost, and the cable cutter device as a whole becomes inexpensive.

[Brief description of drawings]

FIG. 1 is a perspective view of a cable cutter device according to the present invention.

FIG. 2 is a perspective view of an aerial work vehicle provided with the cable cutter device.

FIG. 3 is a perspective view of a roller driving unit of the cable cutter device.

FIG. 4 is a front view of an aerial work vehicle provided with the cable cutter device.

FIG. 5 is a cross-sectional view showing an example of a cable to be collected.

[Explanation of symbols]

 10 High-altitude work vehicle 11 Vehicle body 12 Revolving platform 13 Boom 15 Work platform 20 Cable cutter device 22 Cable drive unit 23 Cutter unit 24 Control box

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Sato No. 10852-57 Ojiwara, Hachihonmatsucho, Higashihiroshima City, Hiroshima Prefecture Within China Aichi Co., Ltd.

Claims (2)

[Claims] 1. A cable cutter device comprising a feeding means for continuously feeding a cable forward, and a cutter means arranged in front of the feeding means for cutting the fed cable, the feeding means comprising: , At least two pairs of roller driving portions, each roller driving portion is formed in a substantially drum shape with a depressed central portion, and a plurality of cable slip prevention grooves are formed extending in the rotation axis direction of the roller. A cable cutter device, comprising: a drive roller member; and a driven roller member that is disposed so as to face the drive roller member and that is formed in a substantially drum shape with a dent in the central portion. 2. A hydraulic pressure system in which the cable cutter device is disposed on a freely movable vehicle body, and the feeding means and the cutter means are hydraulically driven to supply hydraulic oil to the feeding means and the cutter means. The cable cutter device according to claim 1, wherein the pump drives the pump by taking out a driving force of an engine that drives the vehicle body.