JP2631272B2 - Underground conduit cable extraction device and extraction cable chuck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable pulling device and a cable chuck for pulling out unnecessary underground conduit cables such as remaining cables which are left as dead lines.

[0002]

2. Description of the Related Art When a communication cable or the like laid in an underground conduit is to be removed by a winch or the like after its use is abolished, the laid cable adheres closely to the conduit. It is often impossible to remove it, and it is often cut off at the joint and branch manholes and left as it is. This is called a residual cable.

[0003] Generally, since cables are housed in steel pipes or other conduits and buried for a long period of time, they may be in close contact with the inner surface of the conduits due to mud, dirt or rust. Many, to pull this out,
Since it is necessary to remove the close contact at the start of drawing,
It requires a very large pull-out force, which is not easy. After the above-mentioned close contact has been released and movement has started, it is possible to pull out with a normal winch or the like.

[0004] Conventionally, a large-scale drawing apparatus of 1 ton or more has been used to pull out unnecessary underground conduit cables such as the above-mentioned residual cable, but it is relatively small to use. In the case of a manhole, wind the winch wire around the end of the cable, or connect the wire using a simple connecting jig, wind the wire around the winch, and pull out the cable. And had

At the time of this pulling, it is preferable to pull by pulling in the cable axial direction.
In many cases, the cable pulling direction due to the winding is oblique to the cable axis direction, so that the pulling resistance of the cable is increased and the pulling is sometimes difficult.

In particular, if the cable is in close contact with the pipeline due to mud or rust as described above, a considerable force is required to release the sticking at the start of pulling, and a normal number of cables are required. With a winch having a pulling force of 2 tons (2 to 3 tons), the contact cannot be pulled out due to the above-mentioned close contact, and the connecting jig may be broken or the wire may slip off, which is extremely dangerous for work. Was something.

[0007] When a chuck jig using a pair of claw members is used as a jig for connecting a wire to a cable end, if a simple jig member is used, a fastening portion by the claw member is locally localized. In some cases, only the coating made of synthetic resin or lead coating on the outer periphery of the cable is cut off, leaving the core wire inside.

[0008] Therefore, a dead line cable that has not been used is left in the pipeline without being removed, and the pipeline is wasted because of the remaining cable, and a new pipeline is newly installed. It was uneconomical, such as the need to do so.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has been described in detail. The present invention provides an underground pipeline cable pulling device and a cable chuck for pulling out, which can be pulled with a strong force, and can be easily and efficiently and safely pulled out by removing the sticking to the inner surface of the pipeline.

[0010]

SUMMARY OF THE INVENTION A first apparatus for extracting underground conduit cables according to the present invention comprises a pair of opposite sides which can be installed in a manhole in contact with a wall surface at which an end of a cable to be extracted is exposed. One end is fastened and supported for each frame on both sides of the frame, and both sides of the frame are arranged in parallel with the cable axis direction on both sides of the cable end, and the support height can be changed and adjusted A pair of jack devices, a towing cross beam which is attached and bridged by a fastener to an end of the both jack devices opposite to the wall contacting side, and an inner peripheral portion of a cylindrical holder through which a cable can be inserted. A plurality of fastening members having an inner surface having a substantially arc-shaped cross section formed on an uneven surface formed by a number of uneven strips in the circumferential direction are inserted and arranged, and the fastening member is
It is provided movably in the axial direction while being displaced in the radial direction along the guide groove on the inner periphery of the cylindrical holder while holding the inner surface substantially parallel to the cable inserted into the shaft center portion,
By pulling the tubular holder in the cable pulling direction,
A cable chuck configured to clamp and hold a required length range of the cable from the periphery by the tightening member, wherein the tubular holder of the cable chuck is displaceably movable in the longitudinal direction with respect to the towing cross beam. The cable is gripped by the cable chuck and pulled by the operation of the jack device.

A second pulling device of the present invention is characterized in that the gantry comprises a pair of both side frames which are respectively installed in the manhole in contact with a wall surface from which the end of the cable to be pulled is exposed, And a pair of jack devices arranged in a direction parallel to the cable axial direction on both sides of the cable end portion substantially in the middle thereof, and opposite to the wall contacting side of the two jack devices. A plurality of tightening members are provided on the inner side of the tubular holder through which the cable can be inserted, and a plurality of tightening members are provided so that the inner surface is substantially parallel to the cable inserted through the shaft center portion. While being held, it is inserted and arranged to be movable in the axial direction while being displaced in the radial direction along the guide groove on the inner circumference of the cylindrical holder, and by pulling the cylindrical holder in the cable pulling direction,
A cable chuck for tightening and holding a required length range of the cable with a tightening member, and a connecting member connected to a cylindrical holder of the cable chuck, extending parallel to the cable axis direction, and being engaged with the towed cross beam or the same. And a pair of turnbuckles connected to the buckle.

A third aspect of the present invention is a pulling cable chuck used in the above pulling device, comprising a tubular holder through which a cable can be inserted, and a plurality of tightening members inserted and arranged in an inner peripheral portion thereof. Consisting of a cylindrical holder,
The vertically divided half bodies are appropriately separated and fastened by fasteners so as to be separable, and the inner peripheral portion has a guide groove inclined in a tapered shape from one opening toward the other side at a required interval in the circumferential direction. Each of the tightening members has an inner surface having an arc-shaped cross section formed on a concave and convex surface formed by a number of concave and convex strips in a circumferential direction, and fits into the guide groove on an outer surface when inserted into a cylindrical holder. A guide portion is provided, and by the pulling movement of the cylindrical holder toward the one opening side, the fastening member is radially held while keeping the inner surface substantially parallel to the cable inserted through the shaft portion. It is characterized in that it is displaced to clamp and hold the required length range of the cable.

[0013]

According to the above-described apparatus for extracting underground pipeline cable according to the present invention, the pair of jack devices arranged in parallel with the cable axis on both sides of the end of the cable to be extracted are towed. Since the cross beam is pushed in the cable pulling direction, and the cable chuck set at the cable end is pulled through the cross beam in parallel with the cable axis direction,
The strong traction force of the jack device can be uniformly applied to the cable without any loss, and there is no extra frictional resistance when the cable is pulled obliquely. In addition, since the frame is installed with the two side frames supporting the jack device in contact with the wall surface, the two side frames can be installed in contact with the situation of other cables on the wall surface. Since the height of the jack device can be adjusted and supported, the work of setting the jack device in parallel with the end of the cable can be easily performed.

Further, the cable chuck has a plurality of tightening members whose inner surfaces are formed on an uneven surface having a slip-preventing effect by circumferential uneven lines, and the required length range of the cable is set by the traction action to the tightening members. Since the cable can be tightened and gripped, the cable is strongly tightened, and can be reliably gripped without fear of detachment or detachment due to slippage.

Therefore, the cable can be reliably pulled in the axial direction with a strong force, and the fixation to the pipeline can be easily and reliably removed, and thus the cable can be easily pulled out.

Note that if the cable is pulled out to a certain length, the tight contact with the conduit becomes weak and the frictional resistance becomes small, so that the cable can be easily pulled out by a normal winch.

Further, according to the second aspect of the present invention, the frame is installed such that the frames on both sides are in contact with the wall surface where the end of the cable to be extracted is exposed, and the pair of jack devices is formed. The cable end was supported in parallel on both sides of the cable end, the tubular holder of the cable chuck was fitted and inserted into the cable end, and a plurality of fastening members were inserted into the tubular holder so as to fasten the cable at the shaft center. In this state, the towing cross beam supported by the pair of jack devices is temporarily fastened by a turnbuckle. As a result, the tightening member is maintained in a state where the required length range of the cable at the shaft center portion is tightened.

In this state, the towing cross beam is pushed in the cable pull-out direction by the operation of the two jack devices to pull the tubular holder of the cable chuck.
Due to this pulling action, the internal tightening member further tightens the cable and pulls the cable in the cable pulling direction, whereby the cable and the conduit can be pulled out without close contact.

According to this pull-out device, the jack device can be assembled and set even in a relatively narrow work space, and the jack device is operated by temporarily tightening it with a turnbuckle, so that the jack device is reduced in loss and the cable is reduced. In addition to being able to apply a uniform traction force to the cable in the axial direction, the cable can be efficiently and reliably pulled out.

In particular, according to the cable chuck of the third aspect of the present invention, the guide portions of the plurality of tightening members inserted into the cylindrical holder are fitted into the tapered inclined guide grooves provided on the inner periphery of the cylindrical holder. Therefore, the tightening member is displaced in the radial direction while being held substantially parallel to the cable along the inclination of the guide groove by the pulling action of the cylindrical holder, so that the tightening is concentrated at one location. It is possible to securely clamp the required length range in the axial direction of the cable without any trouble, and moreover, the inner surface of the tightening member has an uneven surface due to the circumferential unevenness, so that the ridge is formed throughout the inner surface. You can make the outer periphery of the cable bite,
It is possible to securely grip without fear of slipping or slipping out. Therefore, the cable made of synthetic resin or lead, etc., is not excessively torn, and the more it is pulled, the stronger it is tightened, and there is no risk of slipping or pulling out due to the uneven ridges on the inner surface Together
The cable can be reliably pulled out.

In addition, since the cylindrical holder is formed by fastening the half body with a fastener, the above-described pulling and pulling operation allows the uneven strip on the inner surface of the fastening member to be inserted into the cable. Even so, by removing the above-mentioned fastening and separating the half body, the biting of the fastening member can be easily removed.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 1 shows a state in which a pull-out device used for carrying out the present invention is set in a manhole (B) in order to pull out an unnecessary cable (K) such as a remaining cable in an underground conduit. I have.

This drawing device has the following configuration.

(1) is a frame, which is a channel type or H type.
A substantially L-shaped bilateral frame (4) comprising a vertical column (2) made of a mold steel such as a die, and a leg member (3) connected to a lower end of the vertical column (2) by bolt fastening means, welding means, or the like. (4)
Each of the vertical columns (2) has a wall (b) at which an end (k1) of the cable (K) projects and is exposed.
It is provided so that it can be installed in contact with 1).
(5) is a front vertical column erected at the end of the leg member (3).

(7) (7) is a pair of hydraulic jacks and the like supported by the gantry (1) and arranged in parallel on the left and right sides of the cable end (k1) at a substantially intermediate position. is there. A receiving member (8) made of H-shaped steel or the like is connected to one end on the wall surface side of both jack devices (7) and (7). (9) indicates a connecting portion with the seat member (8). As this jack device (7), a manual or automatic hydraulic jack is used particularly preferably because of its large traction force, but other jack means can also be used.

The receiving member (8) is mounted on a receiving table (10) fixed to the vertical column (2) of the both-side frames (4) and (4), and is connected to the wall (b1). The jack device (7) is opposed to the wall surface (b1) via the receiving member (8).

The receiving member (8) and the pedestal (10) are fixed to a mounting hole (11) on the side surface of the vertical column (2) by a fastener (12) such as a bolt or a nut. I have. The mounting holes (11) are provided at required intervals in the vertical direction, so that a fixing position by the fastener (12) can be appropriately selected. Thereby, the mounting height of the receiving member (8), that is, the supporting height of the left and right jack devices (7) and (7) can be changed and adjusted, respectively. If the mounting hole (11) is formed in a longitudinally elongated shape,
The mounting height can be finely adjusted.

Reference numeral (13) denotes a cylinder receiving arm which is connected to the receiving member (8) or the receiving stand (10) by welding means or the like so that the jack device (7) can be supported substantially horizontally. Is provided. This arm (1
It is desirable that the front end of 3) is supported by being fastened to the front vertical column (5) by bolts. If the jack device (7) is relatively small, said arm (13) is not necessary.

Numeral (15) is a tow beam which is attached and bridged via a connecting portion (16) to an end of the jack devices (7) and (7) opposite to the wall surface side, and (17). ) Are fasteners such as bolts for detachably attaching the cross beam (15). A connecting member (18) of a cable chuck described later is engaged with the cross beam (15).

The receiving member (8) is connected to the vertical column (2).
Or the jack device (7) can be mounted directly on the vertical column (2).

For example, in the drawing device of the embodiment shown in FIG. 3, one end of each of the jack devices (7) and (7) is connected to the front surface of the vertical column (2) made of H-shaped steel via the connecting portion (9). 2 shows a case in which the bolts are attached by bolt fastening means (12a). In some cases, the connecting portion (9) is omitted and attached. The mounting hole (11) for fastening the bolt is
Jack device (7) consisting of vertical slit holes
(7) can be attached and fixed at an arbitrary height position.

In this embodiment, the leg member (3) is fastened to the lower end of the vertical column (2) by bolt fastening means, so that it can be assembled and set inside the manhole. (19a) and (19b) in the figure are auxiliary materials or reinforcing materials made of an angle material or the like for preventing falling. In addition, an auxiliary plate for fastening to a ceiling or the like of a manhole may be attached to the upper end of the vertical column (2).

Also in this embodiment, a tow cross beam (15) is attached to the other end of each of the cylinder devices (7) and (7) with a fastener (17) such as a bolt, and is bridged. The coupling member (18) of the cable chuck is engaged.

(20) is the wall surface (b) of the manhole (B).
1) A cable chuck capable of clamping and holding the end (k1) of the cable (K) projecting from the cable (K1) by a traction action over a required length range in the axial direction.

The cable chuck (20) is, for example, a cylindrical holder (21) through which a cable (K) can be inserted.
And a plurality of tightening members (22) having a substantially arc-shaped cross section inserted and arranged in the inner peripheral portion thereof.
Is inserted and installed so as to be relatively movable in the axial direction with respect to the cylindrical holder (21) while being displaced in the radial direction while keeping the inner surface in a substantially parallel state with respect to the cable (K) inserted through the shaft center portion. The cable (K) can be clamped in a required length range by the clamping member (22) by pulling the cylindrical holder (21) in the cable pulling direction.

In particular, the cable chuck (20) of the illustrated embodiment has the following configuration as shown in an enlarged manner in FIGS.

The cylindrical holder (21) is formed by joining vertically divided half bodies (21a) and (21b) by joining the divided surfaces with a fastener (20a) such as a bolt and nut. The fastener (20a) is configured to be separable and connectable by a tightening / releasing operation. In order to increase the dimensional accuracy of the butt joint, the split surfaces of the two halves (21a) and (21b) are provided with engaging holes (20b) and projections (2) that fit together.
0c).

At the inner peripheral portion of the cylindrical holder (21), a guide inclined in a tapered shape from one opening side to the other side is provided at a required interval in the circumferential direction, for example, at a position facing 180 °. A groove (23) is formed. In particular, in the case of the illustrated embodiment, a guide groove (23) is provided at the center of each of the divided bodies (21a) (21b).

On the other hand, a plurality of, for example, two opposing clamping members (22) (22) inserted into the inner peripheral portion of the cylindrical holder (21) have substantially arc-shaped cross sections, and the guide groove is formed on the outer surface thereof. A guide part (24) formed of a projection or the like inclined in the axial direction (general line direction) to be fitted into (23) is provided, and this guide part (24) is fitted into the guide groove (23) to form a cylindrical shape. When inserted into the holder (21), the cylindrical holder (2) is displaced in the radial direction while keeping the inner surface parallel to the cable (K) inserted through the shaft center portion.
1) is provided so as to be relatively movable in the axial direction.

In other words, with the cable (K) held by the fastening member (22), the cylindrical holder (2)
By pulling 1) toward the one opening side, the clamping member (22) is displaced in the radially-reduced direction so that the required length range of the cable (K) can be clamped and gripped on the inner surface thereof. I have.

The inner surface of the tightening member (22) has a substantially arc-shaped inner surface formed by circumferential irregularities having a triangular cross-section as shown in the figure in order to provide an effect of preventing the cable (K) from slipping. It is desirable to form on an uneven surface or another uneven surface having an anti-slip effect. The radius of curvature of the inner surface of the tightening member (22) can be arbitrarily set in the range of 50 to 100 mm according to the diameter of the cable (K) to be pulled out, and the arc-shaped radius of curvature of the outer surface is It is set to be slightly smaller than the inner diameter of the cylindrical holder (21), and set so that the cable (K) starts to be tightened from a state in which substantially the entirety of the tightening member (22) is inserted into the cylindrical holder (21). Is good.

The cylindrical holder (21) may be formed in a cylindrical shape by welding means or the like. However, when the cable is pulled out, if the fastening member (22) is in a state in which the cable is hardly inserted. It is desirable that the cylindrical holder (21) is formed so as to be separable as described above, since it cannot be easily removed.

As shown in the figure, connecting protrusions (25) and (25) for pulling are provided at 180 ° opposite positions on the outer peripheral surface of the cylindrical holder (21).

(26) (26) is one end side shaft portion (26a)
Is the connecting projection (25) of the cylindrical holder (21).
A pair of turnbuckles connected to (25) and extending in parallel with the cable axial direction, and the other end side shaft portion (26b) is connected to the connecting member (1) engaged with the towed cross beam (15) described above.
8).

The connecting member (18) is, as shown in an enlarged view in FIG. 4, a front surface of the main body portion (28) which is vertically fitted and engaged with the horizontal beam (15) made of H-shaped steel from the front side. A connecting arm (30) is rotatably mounted on the connecting arm. Both ends of the connecting arm (30) project up and down from the cross beam (15), and the turn buckles (26)
(26) are connected. (29) is the main body (2)
8) A locking bolt for preventing detachment from the cross beam (15). In this state, the connecting member (18) is connected to the cross beam (1).
Although it can move freely in the longitudinal direction of 5), its movement is regulated by temporarily tightening it with the turnbuckle (26), so that there is no problem in use.

In order to pull out an underground conduit cable (K) such as a dead wire or other remaining cable which is no longer used by using the above-mentioned pulling device, as shown in FIGS. The frames (4) and (4) on both sides of the gantry (1) are installed at appropriate intervals so as to be in contact with the wall surface (b1) where the end (k1) of K) is exposed, and the gantry (1) Supported pair of jack devices (7)
(7) is supported in parallel across the cable end (k1). Then, the towing cross beam (15) is attached to the front end of the jack device (7) (7), and the connecting member (18) is engaged with the cross beam and set.

At this time, the right and left jack devices (7) and (7) are supported at different heights according to the height position of the cable (K) and the situation of other cables in the vicinity. The tow cross beam (15) of the section may be mounted diagonally. In this case, the interval between the jack devices (7) and (7) supported on the both-side frames (4) and (4) is adjusted according to the length of the towing cross beam (15), or the length corresponding to the interval is adjusted. Use horizontal beams.

Then, the cylindrical holder (21) of the cable chuck (20) is fitted and inserted into the cable end (k1), and the fastening member (22) is connected to the cable (K) inserted through the axial center thereof. Hold the cylindrical holder (2
1) and connected to the connecting member (18) engaged with the towed cross beam (15) in this state via a turnbuckle (26) (26) (FIGS. 1 and 2). ), Temporarily tighten with these turnbuckles (26), (26). Thus, the fastening member (22) is held in a state where the required length range of the cable (K) at the shaft center is tightened, and the gantry (1) is pressed against the wall surface (b1) and held in the set state. You.

In this state, by operating the jack devices (7) and (7) in the extending direction, the jack device (7) acts so as to project between the wall surface (b1) and the towing cross beam (15). The cross beam (15) is pushed in the cable pulling direction to pull the tubular holder (21) of the cable chuck (20), whereby the internal fastening member (22) is further moved with respect to the cable (K). Tighten strongly.

That is, the guide portion (24) provided on the outer peripheral surface of the fastening member (22) is fitted into the inclined guide groove (23) provided on the inner periphery of the cylindrical holder (21),
As a result of the tubular holder (21) being pulled by the tightening member (22), the tightening member (22) is substantially parallel to the cable (K) at the axis along the inclination of the guide groove (23). It is displaced in the radial direction while being kept in the state, and the required length range in the axial direction can be clamped and gripped.

In this manner, the cable (K) can be pulled by pulling the entire cable chuck (20) in a state of being tightened to a certain extent, and only the film of the cable (K) made of synthetic resin or the like is not torn. In addition, since the more tightly the more the cable is pulled, the tighter the cable (K) is in contact with the pipe line without any slippage, and the tighter the cable (K) can be.

Further, since the pair of jack devices (7) (7) arranged on both sides of the cable (K) are pulled in parallel with the cable axial direction, the temporary fastening by the turnbuckle (26) is combined with the effect. As a result, a strong traction force (8 to 10 tons) by the jack device (7) (7) such as a hydraulic jack can be uniformly applied to the cable (K) without loss, and the extra force such as when the cable is pulled obliquely can be provided. No significant frictional resistance acts.

Accordingly, the cable (K) can be reliably pulled in the axial direction with a strong force, and the cable (K) can be easily and reliably detached from the conduit, and thus the cable can be easily pulled out.

After the cable (K) is pulled out to a certain length by repeating such an operation, the contact with the pipe is weakened and the frictional resistance is reduced, so that the cable (K) can be easily pulled out by a normal winch.

[0056]

As described above, according to the apparatus for extracting underground cables of the present invention, it is possible to easily perform the operation of extracting unnecessary cables such as remaining cables even in a relatively small manhole work space. In particular, the liquid pressure by the jack device can be used to pull the cable in a direction parallel to the cable axis direction with a strong force without any loss, and the required length range of the cable can be clamped and gripped by the cable chuck by the pulling action. As a result, the tightening to the cable is strengthened, and there is no possibility of slipping or slipping off due to slip. Therefore, the cable can be easily, efficiently and safely pulled out by removing the fixation to the inner surface of the conduit.

Further, by using the cable chuck according to the third aspect of the present invention to grip the end of the cable,
As the film made of synthetic resin etc. of the cable is not torn off, and the more it is pulled, the more it is tightened,
Slip does not occur, and the cable can be securely gripped and pulled out. Further, when the tightening member is in a state of being hardly inserted into the kale, it can be easily removed and the setting operation becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a pulling device according to an embodiment of the present invention is set in order to carry out a method of pulling out a cable.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a perspective view showing a state in which a drawing device of another embodiment is set.

FIG. 4 is a sectional view of a connecting member of the above.

FIG. 5 is a perspective view of a cable chuck.

FIG. 6 is a longitudinal sectional view of the cable chuck.

FIG. 7 is a cross-sectional view of the cable chuck.

[Explanation of symbols]

 (1) Mount (2) Vertical column (3) Leg material (4) Frame on both sides (7) Jack device (15) Tow cross beam (18) Connecting member (20) Cable chuck (21) Cylindrical holder (21a) ( 21b) Half body (22) Tightening member (23) Guide groove (24) Guide part (26) Turnbuckle

 ──────────────────────────────────────────────────続 き Continuing on the front page (73) Patent owner 594097745 Kansai System Maintenance Co., Ltd. 1-2-19 Koda, Habikino-shi, Osaka (72) Inventor Tatsuo Fukui 1-29-19-1 Kujo, Nishi-ku, Osaka-shi, Osaka Nasu Electric Inside Shoji Co., Ltd. (72) Inventor Toshio Okina 1-2-19 Kouda, Habikino-shi, Osaka Kansai System Maintenance Co., Ltd. Inventor Seiji Matsunaga 2-5-5 Hyakurakuen, Nara City, Nara Prefecture (72) Inventor Tomohiro Mashiba 16-17, Maruyama-cho, Suita-shi, Osaka (56) References 3-30711 (JP, U) Japanese Utility Model 2-104710 (JP, U) Japanese Utility Model 5-77339 (JP, U)

Claims (3)

(57) [Claims] In a manhole, a frame comprising a pair of both side frames which can be installed in contact with a wall surface where an end portion of a cable to be pulled out is exposed, and one end portion is fastened to each side frame of the frame.
Is supported and arranged on both sides of the cable end in a direction parallel to the cable axis . Support height can be changed and adjusted
A pair of jack devices, a towing cross beam which is attached and bridged by a fastener to an end of the both jack devices opposite to the wall contacting side, and an inner peripheral portion of a cylindrical holder through which a cable can be inserted. The section is omitted
When a plurality of tightening members having an arc-shaped inner surface formed on an uneven surface by a number of uneven strips in the circumferential direction are inserted and arranged.
In addition, the tightening member can move in the axial direction while being displaced in the radial direction along the guide groove on the inner periphery of the cylindrical holder while holding the inner surface substantially parallel to the cable inserted through the shaft center portion. provided on, the traction of the cable pulling direction of the tubular holder, and a cable chuck configured to grip tightened from ambient to the required length range of the cable by the clamping member, the cable chuck The cylindrical holder can be displaced in the longitudinal direction on the towed beam.
Connected to the connecting member to be engaged with the ability the jack device withdrawal device underground conduit cable, characterized in that so as to tension by gripping the cable in the cable chuck actuation of. 2. A manhole comprising a pair of both-side frames which are provided so as to be in contact with a wall surface on which an end portion of a cable to be pulled out is exposed, and supported by the both-side frames of the frame, respectively. A pair of jack devices arranged on both sides of the end portion in a direction parallel to the cable axis direction; and a tow-cross beam attached to and bridged on the opposite end portion of the both jack devices from the side facing the wall surface. A plurality of tightening members are provided on the inner peripheral portion of the cylindrical holder through which the cable can be inserted, along the guide groove on the inner peripheral surface of the cylindrical holder while keeping the inner surface substantially parallel to the cable inserted through the shaft center portion. The cable is inserted and arranged so that it can be moved in the axial direction while being displaced in the radial direction.The cable is pulled by the tubular holder in the cable withdrawal direction, and the clamping member clamps and holds the required length range of the cable. A chuck, a pair of turnbuckles connected to the tubular holder of the cable chuck, extending in parallel with the cable axial direction, and connected to the towed cross beam or a connecting member engaged with the towed cross beam. Characteristic device for extracting underground pipeline cable. 3. The underground conduit according to claim 1 or 2.
A cable chuck used for cable extraction equipment
There, a cylindrical holder which can inserted through the cable, and a plurality of clamping members which are inserted in the inner peripheral portion thereof, the tubular holder by properly fasteners Tatewari been halves
In addition to being configured to be separably fastened, the inner peripheral portion has a guide groove which is tapered from one opening toward the other side at a required interval in the circumferential direction, and each fastening member has an arc-shaped cross section. The inner side surface is formed on the uneven surface by a number of uneven lines in the circumferential direction, and the outer side surface is provided with a guide portion that fits into the guide groove when inserted into the cylindrical holder, Due to the pulling movement of the cylindrical holder toward the one opening side, the tightening member is displaced in the radial direction while keeping the inner surface substantially parallel to the cable inserted through the shaft portion, and the required length of the cable A cable chuck for pulling out, characterized in that the holding area is clamped.