JP2020167871A - Cable transfer device, piece for caterpillar track body, caterpillar track body and cable transfer method - Google Patents

Abstract

To provide a cable transfer device which can stably hold a cable and make pulling force act on the cable, and which can stably pull and transfer the cable, in a state in which a caterpillar track body contacting the cable is hard to slide, even when the cable in a state in which an external surface is easy to slide is pulled out.SOLUTION: A cable transfer device of the present invention has a pair of caterpillar track bodies composed of numerous connected pieces consisting of rigid material, in which the pair of caterpillar track bodies are opposed and arranged almost in parallel with an interval capable of holding a cable, connected pieces where the pair of caterpillar track bodies are opposed and arranged sequentially pull and transfer the cable by holding the cable and making pulling force act on the cable by shifting the pair of caterpillar track bodies in the same direction, the pieces have a positioning recess portion for stably transferring the cable while holding the cable in a connection direction, and have at least two or more projections contacting an external surface of the cable in an inner surface of the positioning recess portion.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cable transfer device, a track-shaped piece, a track-shaped body, and a method for transferring a cable.

Conventionally, when an OF (Oil-Filed) cable installed in a cave or a pipeline is removed, it is pulled out on a manhole and then wound around a cable drum for collection. Since the OF cable is heavy, a strong tensile force is required to pull it out onto the manhole. Therefore, for example, a halling machine or the like is used for pulling out the OF cable.

Here, in the halling machine, a pair of endless track strips formed by connecting a large number of frames are arranged to face each other, and the endless track strips move in the same direction to obtain a target cable. It has a structure to tow and pull out. In such a halling machine, a stronger tensile force is required in order to achieve more stable pulling out of the cable.

For example, in Patent Document 1, a halling machine made of an elastic material such as synthetic rubber and having a groove-shaped recess in the center of the upper surface is applied to an endless orbital strip-shaped body. (Cable transfer device) has been proposed. According to Patent Document 1, such a halling machine has an extremely strong traction force and a holding force, and is less likely to cause a failure even if it is continuously operated for a long time.

JP-A-2002-330511

By the way, a POF (Pipe-type Oil Filled) cable, which is a kind of OF cable, has a structure in which three cores (cables) are arranged in a steel pipe and filled with insulating oil. Such pull-out transfer of the POF cable is performed for each wire core (cable), and the outer surface of the core is immersed in insulating oil. When a holing machine as proposed in Patent Document 1 is used when pulling out a cable with such insulating oil adhering to the surface, the top surface is made of an elastic material such as synthetic rubber. It is assumed that the contact surfaces between the cable and the cable may slip without obtaining sufficient frictional force, and the cables cannot be strongly sandwiched between the pieces, so that a strong tensile force cannot be sufficiently achieved. .. When the surface condition of the cable to be pulled out and transferred has a small coefficient of friction and becomes slippery, it is not limited to the POF cable, and in particular, it is an old cable that has been laid in the ground or underwater for a long period of time. When pulling out and removing the cable, it is assumed that various foreign substances may adhere to the surface of the cable, and the surface condition of the cable to be pulled out is not a little slippery, which is the efficiency of the pulling out work. It may have adverse effects such as a decrease in the amount of work and an increase in working hours.

The present invention has been made in view of the above circumstances, and even when a cable whose surface is slippery is pulled out, the endless track strip in contact with the cable is not slippery and the cable is securely sandwiched. A cable transfer device that can apply a tensile force to the cable and can stably pull out and transfer the cable, a track frame for an infinite track band and an infinite track band shape for forming the cable, and the device. It is an object of the present invention to provide a cable transfer method used.

As a result of diligent studies in order to achieve the above-mentioned object, the present invention includes a pair of endless track strips formed by connecting a large number of pieces made of rigid materials, and the pair. The endless track strips of the above are arranged to face each other substantially in parallel at intervals where the cable can be sandwiched, and by moving the pair of endless track strips in the same direction, the pair of endless track strips are positioned so as to face each other. A cable transfer device in which connected pieces sequentially hold the cable and apply a tensile force to the cable to pull out and transfer the cable, and the pieces are along the connecting direction of the pieces. A cable having a positioning recess for stable transfer while sandwiching the cable, and having at least two or more protrusions on the inner surface of the positioning recess that come into contact with the outer peripheral surface of the cable, so that the surface is slippery. Even when pulling out, the endless track strip in contact with the cable is not slippery, the cable can be securely pinched and a tensile force can be applied to the cable, and the cable can be pulled out and transferred stably. We found that there was something, and came to complete the present invention.

That is, the gist structure of the present invention is as follows.
(1) A pair of infinite orbital strips formed by connecting a large number of pieces made of rigid materials are provided, and the pair of infinite orbital strips are arranged so as to face each other substantially in parallel at intervals at which cables can be sandwiched. By moving the pair of infinite orbital strips in the same direction, the connected pieces in which the pair of infinite orbital strips are located facing each other sequentially hold the cable and pull the cable with respect to the cable. A cable transfer device for pulling out and transferring the cable by operating the above, wherein the piece has a positioning recess for stable transfer while sandwiching the cable along the connecting direction of the piece, and the inner surface of the positioning recess. A cable transfer device having at least two or more protrusions in contact with the outer peripheral surface of the cable.
(2) The cable is further provided with a solvent injection unit which is arranged upstream from the position of the pair of endless track strips for pulling out and transferring the cable and injects a solvent for cleaning the outer surface of the cable. The cable transfer device according to (1).
(3) The cable transfer device according to (1) or (2), wherein the protrusion is claw-shaped.
(4) The cable transfer device according to (1), (2) or (3) above, which is used for pulling out and removing an existing cable in a cave or a pipeline.
(5) Positioning for an endless track strip-shaped piece constituting the cable transfer device according to any one of (1) to (4) above, in which the cable is stably transferred while sandwiching the cable along the connecting direction of the pieces. A track-shaped piece for an endless track having a recess and having at least two or more protrusions on the inner surface of the positioning recess that come into contact with the outer peripheral surface of the cable.
(6) An endless track band-shaped body formed by connecting a large number of tracks for the endless track band-shaped body according to (5) above.
(7) By using the cable transfer device according to any one of (1) to (4) above and moving the pair of endless track strips in the same direction, the pair of endless track strips face each other. A method for transferring a cable, which comprises a step of pulling out and transferring the cable by applying a tensile force to the cable while sequentially sandwiching the cable between the connected pieces.

According to the present invention, even when a cable whose surface is slippery is pulled out, the endless track strip in contact with the cable is not slippery, and the cable is securely sandwiched and a tensile force is applied to the cable. It is possible to provide a cable transfer device capable of stably pulling out and transferring a cable, a track frame for an endless track band and an infinite track band for constituting the cable transfer device, and a cable transfer method using the device. it can.

It is a schematic top view of the cable transfer device of one Embodiment of this invention. It is a schematic front view of the cable transfer device of FIG. It is a schematic side view of the cable transfer device of FIG. (A) to (e) are perspective views showing various deformation examples of the coma constituting the endless track band of the cable transfer device of the present invention. It is a figure which shows an example of the power part which comprises the cable transfer device of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments.

FIG. 1 is a schematic top view of a cable transfer device according to an embodiment of the present invention. FIG. 2 is a schematic front view of the cable transfer device according to the embodiment of the present invention. FIG. 3 is a schematic side view of the cable transfer device according to the embodiment of the present invention.

The illustrated cable transfer device 1 mainly comprises a pair of endless track strips 10a and 10b formed by connecting a large number (at least 20 or more) pieces 11a and 11a and pieces 11b and 11b made of a rigid body material, respectively. The pair of endless track strips 10a and 10b are arranged so as to face each other substantially in parallel at intervals so that the cable C can be sandwiched, and the pair of endless track strips 10a and 10b are arranged in the same direction, more specifically, of the cable C. By moving in the pulling direction, the connected frames 11a and 11b in which the pair of endless track strips 10a and 10b are located facing each other sequentially sandwich the cable C and pull the cable C with respect to the cable C. Is used to pull out and transfer the cable C.

Then, in the cable transfer device 1 of the present embodiment, the frame 11 constituting the endless track strip 10 is stably transferred while linearly sandwiching the cable C along the connecting direction of the frame 11 without meandering. It is characterized by having 111 and having at least two or more protrusions 112 (not shown in FIGS. 1 to 3) in contact with the outer peripheral surface (surface) of the cable C on the inner surface of the positioning recess 111. Is to be. The cable C does not constitute the cable transfer device 1.

Further, although not indispensable, the illustrated cable transfer device 1 includes a drive wheel 12 that maintains the ring shape of the endless track of the endless track band 10 and applies a rotational force to the endless track band 10, and an endless track. A driven wheel 13 that maintains the ring shape (track) of the track 10, and a storage case 14 that secures a space for the portion of the track 10 that does not sandwich the cable C to move on the track. In addition to the pair of endless track strips 10a and 10b described above, the cable introduction portion 15 for introducing the cable C and the positioning recess 111 for supporting the introduced cable C and adjusting the height (vertical direction) of the cable A cable support portion 16 that can be aligned with the height of the track, a cable discharge portion 17 that discharges the cable C, and an interval adjustment frame that can adjust the expansion and contraction and adjust the interval between the pair of endless track strips 10a and 10b. It includes 18, a power unit 19, a first deceleration unit 20, a second deceleration unit 21, and a crimping unit 22.

The cable C to be pulled out and transferred is introduced from the cable introduction portion 15, passes through the cable support portion 16, and is discharged from the cable discharge portion 17. As shown in FIG. 2, the cable introduction portion 15 includes rollers 151 and 152 on the upper and lower sides. Although not shown, the cable discharge unit 17 also has rollers on the top and bottom like the cable introduction unit 15. The cable C is maintained in a straight line between the cable introduction portion 15 and the cable discharge portion 17. Then, the pair of endless track strips 10 sandwich the cable portion located between the cable introduction portion 15 and the cable discharge portion 17 of the cable C, and pull out and transfer the cable in the direction D.

The tracked track 10a is paired with another tracked track 10b and is arranged substantially parallel to each other. The pair of endless track strips 10a and 10b are adjusted so that the cable C can be sandwiched, and are controlled at regular intervals.

Here, the endless track belt-shaped body 10 is configured by connecting a large number of pieces 11 and 11 made of rigid materials, respectively, and as an example, although not shown, a ring-shaped chain (conveyor chain). Can be used to connect the frames 11 and 11 to each other. Specifically, the track-shaped endless body 10 is fixed by fastening two ends of the pieces 11 in the longitudinal direction to flanges provided on a ring-shaped chain (conveyor chain), respectively, and the plurality of pieces 11 and 11 are connected to each other. Is indirectly connected via a chain, and the frames 11, 11, ... Can be arranged over the entire circumference of the conveyor chain.

Then, the endless track band 10 formed in this way can move between the wheels in an infinite track by two wheels (drive wheel 12 and driven wheel 13) arranged inside the endless track. In addition, most of the endless track belt-shaped body 10 is stored in the storage case 14, and is located at a position where it comes into contact with the cable C to be pulled out. The sandwiching portion 101a composed of a plurality of frames 11 and its vicinity thereof. Only the cable C is exposed to the outside, and the cable C is sandwiched together with the sandwiching portion 101b of the tracked track 10b arranged to face the tracked track 10a, and the two opposite tracked tracks 10a and 10b are sandwiched. By moving the portions 101a and 101b so as to proceed in the same direction (here, the direction D), the sandwiched cable C can be pulled out and transferred in the direction D.

Further, in the track-shaped body 10, at least the sandwiching portion 101 is arranged substantially linearly. In order to support the holding portion 101 from the back side and to move the holding portion 101 in a substantially straight line, for example, a running guide (not shown) may be provided on the storage case 14 side of the holding portion 101. Further, the traveling guide may be provided on the portion of the tracked track 10 located other than the holding portion 101, and the track of the tracked track 10 can be formed by the traveling guide.

Further, by providing rollers (not shown) at the upper and lower ends of the endless track strip 10 and providing the runway of the roller on the traveling guide, the endless track strip 10 can be moved more efficiently. it can.

Next, various modifications of the coma constituting the endless track band of the cable transfer device described above will be described with reference to FIG. 4 (a) to 4 (e) are schematic schematic views of a track-shaped piece for an endless track according to an embodiment of the present invention. Hereinafter, first, a description will be given based on FIG. 4 (a).

The frame 11 for such an endless track strip has a positioning recess 111 for stable transfer while sandwiching the cable C along the connecting direction D of the frames.

When a plurality of frames 11 for such a cable transfer device are connected to form the endless track band-shaped body 10, the endless track band-shaped body 10 also has a positioning recess 111 over the entire circumference thereof. If the positioning recess 111 exists over the entire circumference of the endless track strip 10, a part of the cable C enters the positioning recess 111 when the cable C is transferred, and the cable C with respect to the sandwiching portion 101 of the endless track strip 10. The position of is determined.

Here, the shape of the positioning recess 111 is not particularly limited as long as it can accommodate a part of the cable C, but when viewed from the side along the connecting direction D of the frame 11, FIG. 4A shows. It may be a shape having one or more corners, such as a shape having a valley bottom that is substantially triangular, or a shape having two corners such as a substantially "concave" shape or a trapezoidal shape, and the recess is semicircular. It may have a circular shape and no corners.

The material of the top 11 is not particularly limited as long as it is a rigid body material, but it is preferable that the material does not bend or break due to contact with the cable C, and for example, metals such as iron, aluminum, and titanium, and various alloys. And so on.

The track 11 for the endless track strip has at least two or more protrusions 112 on the inner surface of the positioning recess 111 that come into contact with the outer peripheral surface of the cable C. In FIG. 4A, the protrusion 112 is a plate-shaped portion having a substantially isosceles triangle shape, and the plate surface of the plate-shaped portion is arranged substantially parallel to the connecting direction D of the coma. When the protrusion 112 is provided on the inner surface of the positioning recess 111 in this way, a part of the outer surface of the cable C that has entered the positioning recess 111 comes into contact with the protrusion 112. In particular, by having at least two protrusions 112 and 112 in the positioning recess 111, the pair of endless track strips 10a and 10b have at least two protrusions 112, respectively, and a total of four or more protrusions 112 with the outer surface of the cable C. Will come into contact. Here, since the protrusion 112 is made of a rigid body material, when the cable C is sandwiched and transferred by the pair of endless track strips 10, the protrusion 112 pierces or sticks to the outer surface of the cable C. It acts to scratch the outer surface of the cable C. When the tracked track 10 advances in the traveling direction (direction D) in this state, a tensile force can be applied to the cable C in the traveling direction (direction D) of the tracked track 10. Since the tensile force generated in this way is caused by the protrusion 112 acting to pierce or scratch the cable C, for example, oil has adhered to the outer surface of the cable C. Even if the tracked track 10 comes into contact with the cable C, the pair of track strips 10a and 10b can be effectively prevented from slipping on the outer surface of the cable C, so that the cable C can be stably sandwiched. , A tensile force can be applied to the cable C, and the cable C can be stably pulled out and transferred.

Here, the shape of the protrusion may have a shape that allows the outer surface of the cable C to be securely gripped, and in particular, a claw shape such as a shape that sticks to the outer surface of the cable C or is caught by the cable C. This is preferable in that the force of being caught on the outer surface of the cable C becomes stronger and the tensile force of the cable C can be increased. For example, it is not limited to the isosceles triangle shape as shown in FIG. 4 (a), and for example, the unequal side triangle-shaped protrusion 112a as shown in FIG. 4 (b) and the unequal side triangle shape as shown in FIG. 4 (c). Two connected substantially M-shaped protrusions 112b and truncated cone-shaped protrusions 112c as shown in FIG. 4D (the top may be flat, or a mortar-shaped recess may be provided to project a circular edge. Good), as shown in FIG. 4 (e), protrusions of various shapes such as protrusions 112d having both side surfaces protruding so that the cross section of the top has recesses such as a mortar can be used. Further, the protrusions in FIGS. 4A to 4E are all oriented so that the plate surface is parallel to the connecting direction of the endless track strip 10, but the plate surface is the endless track strip 10. It may be oriented in a direction perpendicular to the connecting direction, and the orientation of the plate surface is not particularly limited. Further, the protrusion 112 does not have to be plate-shaped, and various forms having a conical shape or a sharp shape can be considered. The cable transfer device 1 does not necessarily transfer in only one direction (direction D), and for example, when the cable C is excessively loosened or stretched, it may be transferred in the opposite direction for adjustment. In such a case, if the substantially M-shaped protrusion 112b shown in FIG. 4C is adopted, the cable C can be easily pierced by the outer surface of the cable C in any direction (direction D and the opposite direction). Or it is more easy to get caught, which is advantageous.

Further, the height of the protrusion 112 is preferably the same as the depth of the positioning recess 111 (the deepest portion) (height of the protrusion 112 / depth of the positioning recess 111 = 0.8 to 1.1). With such a depth, it is possible to prevent the cable C from being destroyed.

When the wire is wound around the cable C, the height of the protrusion 112 is preferably larger than the diameter of the wire. As a result, the tensile force can be transmitted from the protrusion 12 to the wire body.

Further, the size of the protrusion 112 is not particularly limited as long as it has a shape of being pierced by the outer surface of the cable C or being caught by the cable C and having a size of two or more arranged in the recess.

When the frame 11 is viewed sideways along the connecting direction D, the shapes of the recess 111 and the protrusion 112 and the arrangement of the protrusion 112 are preferably symmetrical in the vertical direction (longitudinal direction). Since the cable C to be pulled out and transferred usually has a circular cross-sectional shape, by having such symmetry, a tensile force can be applied evenly, and the cable C can be pulled out more efficiently. Can be done.

The material of the protrusion 112 is not particularly limited as long as it is a rigid body material, but it is preferable that the protrusion 112 does not bend or break due to contact with the cable C, and for example, metals such as iron, aluminum, and titanium, and various alloys. And so on. The protrusion may be made of the same material as the other parts of the coma, or may be made of a different material. Further, the protrusion may be removable, and may be fixed to the positioning recess by, for example, screwing.

Further, when the cable C to be pulled out and transferred is wet with water or immersed in oil such as a POF cable, the coma 11 has a liquid drain groove 113 extending in the connecting direction D of the coma on its surface. It may be provided. By providing the liquid draining groove 113 in this way, liquids such as water and oil can be suppressed not only in the frame 11 but also in slippage.

The track-shaped body 10 described above rotates by applying a driving force generated from the power unit 19 via the drive wheel 12. FIG. 5 is a diagram showing an example of the power unit. As shown in FIG. 5, the power unit 19 includes at least a control unit 191 and a prime mover 192. As shown in FIG. 5, the power unit 19 is connected to an external power source E, and power is supplied from the power source E to operate the power unit 19. Then, the control unit 191 is electrically connected to the prime mover 192, and operates the prime mover 192 so that the moving speed of the track-shaped body 10 becomes a speed instructed by the operator of the cable transfer device 1. The prime mover 192 transmits power to the drive wheel 12 arranged above the control unit 191 in accordance with the instruction.

Further, the cable transfer device 1 includes two deceleration units (first deceleration unit 20 and second deceleration unit 21). Both the first deceleration unit 20 and the second deceleration unit 21 change the speed according to the size of the gear.

Further, the cable transfer device 1 includes a crimping portion 22. The crimping portion 22 supports a traveling guide arranged inside the endless track strip 10 to secure the holding force of the endless track strip 10.

Further, as shown in FIG. 2, the cable transfer device 1 includes a solvent injection unit 153 near both ends of the roller 151 of the cable introduction unit 15. When the cable C has oil adhered to its outer surface, the cable C is thus arranged on the upstream side (front side) of the position of the pair of infinite orbital strips 10 for pulling out and transferring the cable C, and the cable. By further providing a solvent injection unit for injecting a solvent for cleaning the outer surface of the cable with respect to C, the amount of adhering oil is reduced to further suppress slippage of the cable C, and insulation is provided inside the cable transfer device 1. It is possible to suppress the infiltration of oil.

Further, when the solvent injection unit 153 is provided, it is preferable that the power unit 19 is subjected to solvent-proof processing. As described above, in order to prevent the surface of the cable C from slipping, when the solvent is injected from the solvent injection unit 153 onto the cable C to wash away the insulating oil, this solvent is provided inside the cable transfer device 1, especially the electric system. This is because there is a risk that the electric system will break down if it invades the power unit 19. Here, "solvent-proof processing" is a concept that includes all kinds of processing to prevent the solvent from coming into direct contact with the electrical wiring, for example, putting the electrical wiring in a solvent-resistant case or making the electrical wiring resistant. Processing such as wrapping with solvent-based tape can be mentioned.

The cable transfer device 1 as described above can be used for pulling out and removing an existing cable in a cave or a pipeline. Only one cable transfer device 1 may be used or a plurality of cable transfer devices 1 may be used when the cable C is pulled out and transferred.

The cable transfer device 1 can be used in place of the conventional cable transfer device (such as a halling machine). Specifically, by using such a cable transfer device 1 and moving the pair of infinite orbital strips in the same direction, the connected pieces in which the pair of infinite orbital strips are located facing each other can be moved. By sequentially pulling out and transferring the cable by applying a tensile force to the cable while sandwiching the cable, even when the cable whose outer surface is slippery is pulled out, the conventional cable transfer device can be used. In comparison, the infinite orbital strip in contact with the cable is less slippery, the cable can be stably sandwiched and a tensile force can be applied to the cable, and the cable can be stably pulled out and transferred. Further, according to such a cable transfer device 1, since the sliding of the cable is suppressed, the time for pulling out the cable can be significantly reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, but includes all aspects included in the concept of the present invention and the scope of claims, and varies within the scope of the present invention. Can be modified to. The cable transfer device 1 described above has shown a configuration in which a pair of endless track strips are arranged on the left and right to transfer the cable in the horizontal direction, but the configuration is not limited to this, and the pair of endless track strips is not limited to this. Can be arranged one above the other to transport the cable horizontally, or a pair of track strips can be arranged vertically to transport the cable vertically. , The discharge direction of the pair of endless track strips can be appropriately changed according to the direction in which the cable is transferred.

1 Cable transfer device 10, 10a, 10b Infinite track strip 101a, 101b Holding part 11, 11A, 11B, 11C, 11D frame 111 Positioning recess 112, 112a, 112b, 112c, 112d Protrusion 113 Liquid drainage groove 12 Drive wheel 13 Wheel 14 Storage case 15 Cable introduction part 151, 152 Roller 153 Solvent injection part 16 Cable support part 17 Cable discharge part 18 Interval adjustment frame 19 Power part 191 Control part 192 Motor 20 First deceleration part 21 Second deceleration part 22 Crimping part C Cable D frame connection direction E Power supply

Claims (7)

It has a pair of endless track strips formed by connecting a large number of pieces made of rigid material.
The pair of endless track strips are arranged so as to face each other substantially in parallel at intervals where cables can be sandwiched.
By moving the pair of endless track strips in the same direction, the connected pieces in which the pair of endless track strips are located facing each other are sequentially pulled with respect to the cable while sandwiching the cable. A cable transfer device that pulls out and transfers the cable by applying force.
The top has a positioning recess for stable transfer while sandwiching the cable along the connecting direction of the top, and has at least two or more protrusions on the inner surface of the positioning recess that come into contact with the outer peripheral surface of the cable. , Cable transfer device. The first aspect of claim 1 is further provided with a solvent injection unit which is arranged upstream from the position of the pair of endless track strips for pulling out and transferring the cable and injects a solvent for cleaning the outer surface of the cable with respect to the cable. The cable transfer device described. The cable transfer device according to claim 1 or 2, wherein the protrusions are claw-shaped. The cable transfer device according to claim 1, 2 or 3, which is used for pulling out and removing an existing cable in a cave or a pipeline. A piece for an endless track strip that constitutes the cable transfer device according to any one of claims 1 to 4.
An endless track band having a positioning recess for stable transfer while sandwiching the cable along the connecting direction of the pieces, and at least two or more protrusions on the inner surface of the positioning recess that come into contact with the outer peripheral surface of the cable. Body piece. An endless track strip formed by connecting a large number of tracks for an endless track strip according to claim 5. By using the cable transfer device according to any one of claims 1 to 4 and moving the pair of endless track strips in the same direction, the pair of endless track strips are connected so as to face each other. A method for transferring a cable, which comprises a step of pulling out and transferring the cable by sequentially applying a tensile force to the cable while sandwiching the cable.

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