WO2002063734A1

WO2002063734A1 - Cable holder, cable laying device, and moving method therefor

Info

Publication number: WO2002063734A1
Application number: PCT/JP2002/000907
Authority: WO
Inventors: Tatsuo Minaka; Hiroyuki Matsubara; Yoshimi Hirata; Akira Kobayashi; Hiroshi Yoshikawa; Masaaki Nishiwaki; Nobuteru Komatsubara
Original assignee: Consec Co.,Ltd.; Nipponhume Co.,Ltd.; Tokyotogesuidouservis Co.,Ltd.
Priority date: 2001-02-05
Filing date: 2002-02-04
Publication date: 2002-08-15
Also published as: KR100793827B1; KR20020097214A

Abstract

A cable holder for attaching communication optical fibers drawn into a sewage pipe to a pipe ceiling portion. The cable holder (31) is made of resin in its entirety and has an inverted U-shape that opens downward, comprising a cable holder (33) formed with pawls (32) in its inlet, and an attaching portion (37) protruded on the cable holder (33), the attaching portion (37) having a plunger pin (39) inserted in a vertical hole that is filled with an adhesive agent, so that when the attaching portion (37) is pressed into a drilled hole formed in the pipe ceiling of a sewage pipe (1), the plunger pin (39) is pressed in and the adhesive agent flows out, whereby the cable holder (31) is adhesively fixed to the pipe ceiling. The cable holder (33) is also integrally formed with cable holders (34) of smaller size on opposite sides thereof, so that different types of cables can be held by the cable holders (34, 34).

Description

TECHNICAL FIELD The present invention relates to a cable holder and a cable laying device and a moving method thereof.

The present invention relates to a cable holder for fixing and supporting a cable such as an optical fiber drawn into a pipe such as a sewer pipe on the pipe inner wall, a laying apparatus for fixing and supporting the cable on the pipe inner wall by a cable holder, and a method of moving the cable. <Background Technology

With the rapid progress of the information society, in recent years, optical fiber networks that can transmit a large amount of information accurately and without being affected by electrical disturbances are being covered as communication networks. In the case of urban areas, such communication networks are often laid using existing sewer pipes.When laid in sewer pipes, trash adheres to the cable consisting of optical fiber, and garbage is collected. The cable is usually fixedly supported by a cable holder on the pipe ceiling so that it does not accumulate and obstruct the flow.

When laying cables, when the sewer pipe is a main line and has a relatively large diameter, work is performed to fix the cable drawn into the pipe by a person entering the pipe and fixing it to the inner wall of the pipe with fasteners. As the size of pipes becomes smaller and smaller so that people cannot enter, the cable will be laid using cable outlets. We are working on construction.

Japanese Patent Publication No. 3-550483 has a work vehicle that is inserted into a sewer pipe from a manhole as this type of locomotive and runs in the pipe by remote control from the outside. Cable holder on the ceiling of the pipe A pair of drills for drilling a hole for inserting a cable, a power cartridge for storing a U-shaped cable holder for fixing the cable to the pipe ceiling, and a cable stored in the cartridge It is disclosed that a striker is punched out one by one upward, and a striker is provided which is pressed into a hole formed in a pipe ceiling by a drill.

As shown in Japanese Patent Application Laid-Open No. 8-103012, the cable holder also has a hook-shaped cable holder that is horizontally oriented at the top and bottom, and has a mounting part that can be pushed into the drill hole. A vertical hole at the bottom is formed, the hole is filled with an adhesive, a plunger pin is inserted, the tip of the plunger pin protrudes from the mounting portion, and the mounting portion is pushed into a drill hole drilled in the inner wall of the pipe, and the plunger pin is inserted. Cable holder which is extruded from the mounting part by indentation and is bonded and fixed with the adhesive which overflows, Japanese Patent Application Laid-Open No. 2000-26192 and Japanese Patent Application Laid-Open No. 2000-21881 As shown in No. 9, it has an inverted U shape that opens downward, and the upper part is screwed or embedded and fixed to the inner wall of the pipe, and has a claw that projects inward at the opening. , Cable holder pre-installed on sewer pipes Are known, fixed support cable Ke - it is summer as is done by locking push the Ke one table, captured in Bull catcher cable holder from the opening.

Among the above-mentioned cable holders, the cable holder which is press-fitted into the drill hole or adhered and fixed can be attached to the existing sewer pipe, and has a plurality of hook-shaped cable holding portions above and below. Cable holders, it is possible to add new cables and attach them to different types of cables, for example, separate the trunk line and branch line from each other and attach them to separate cable holders. The gap between the holding part is so narrow that it is difficult to hang the cable. If a shear force in the diametric direction is applied to the pipe due to an earthquake or the like, the cable may be damaged. At this point, the case opening downward The cable holder has the advantage that the cable can be detached from the opening even if a diametrical shear force is applied to the pipe due to an earthquake or the like, so that the cable is not damaged. However, it has not been possible to add and install new cables or separate cables of different types and attach them separately. Therefore, when adding and installing a new cable, it is necessary to attach a new cable holder to the inner wall of the tube. is there.

If the cable holder is large enough to accept multiple cables, it is possible to add and attach a new cable, but in this case, the following new problems will occur. . That is, when trying to insert a new cable, the inserted cable is often located on the opening, so that the inserted cable hinders the insertion of the new cable, and Is difficult.

With regard to the cable carrier, it is desirable that the cable can be reliably captured and inserted into the cable holder. By using a cable catcher as shown in JP-A-2001-28819, the cable can be reliably caught by opening and closing the hand and positioned at the insertion position into the cable holder. However, when catching and lifting the cable and inserting it into the cable holder through the opening, the cable can be lifted in a mountain shape with the cable catcher at the top, and when the cable is loose In addition, the downward slope of the mountain-shaped cable lifted by the cable catcher becomes steep, which makes it difficult to enter the cable holder.

Regarding the work vehicle used when laying cables, the conventional work vehicle has a mechanism in which movement inside the pipe is controlled remotely from outside the pipe. It is performed by rotating the drive wheels.However, if the slope of the pipe is steep or if the inner wall of the pipe is slimy due to the adhesion of sludge like the existing sewer pipe, slip There is a problem that it is difficult to move within the pipe easily.

An object of the present invention is to provide a cable holder that has a plurality of cable holding portions that open downward and can be attached to an existing sewer pipe or the like by a single attachment operation.

Another object of the present invention is to provide a cable laying apparatus that allows a new cable to be inserted into a cable holder into which a plurality of cables can be inserted without being disturbed by already inserted cables. Another object of the present invention is to provide a cable laying device capable of securely inserting a cable into a cable holder.

Another object of the present invention is to make it possible to reliably move a work vehicle for laying cables even when the pipe has a steep slope and the inner wall of the pipe is slimy and easy to slip. It seeks to provide a way. Disclosure of the invention

According to a first feature of the cable holder according to the present invention, a plurality of substantially U-shaped cable holding portions which are opened downward in the holding metal fitting and whose openings are narrowed are arranged side by side. The anchor protruding upward from the holding fitting has a mounting portion which is pushed into a drill hole drilled in the inner wall of a sewer pipe or the like, and a bottomed vertical hole formed from above in the mounting portion. When the adhesive is filled, the plunger pin is inserted with its tip protruding, and when the mounting part is pushed into the drill hole, the plunger pin is pushed into the vertical hole, which overflows into the drill hole The mounting portion is adhesively fixed with an adhesive.

According to the present invention, the mounting portion of the anchor is pressed into the drill hole formed in the inner wall of the pipe. By simply inserting the cable holder, the cable holder having a plurality of cable holding portions opening downward can be fixed to the inner wall of the pipe.

In the second feature, the holding bracket is attached to the anchor by being stopped by the rotation stopping means, and the cable holding portion is always held in a fixed direction and position.

When the cable catcher catches the cable drawn into the inner wall of the pipe, lifts it, and inserts it into the cable holder, if the captured cable is positioned, it only needs to push up the cable catcher to open the cable holder into the opening. The purchase can be performed reliably.

In order to attach the holding fitting to the anchor while preventing rotation, for example, one of the anchor and the holding fitting is provided with a protrusion such as a pin, and the other is provided with a recessed hole for fitting the protrusion, or the anchor is provided with The cross section forms a polygonal portion such as a quadrangle, and the hole of the holding fitting to which the polygonal part fits is made polygonal, or a key is attached to the anchor, and the holding fitting to which the anchor fits is fitted. It is preferable to form a keyway into which the key fits.

According to the third feature, on both sides of the anchor, a nail made of a panel body having a toe formed in an inverted V-shape is formed so as to protrude obliquely upward, and the nail is narrowed and fitted to the holding bracket. A hole is formed. At the time of fitting, the toes are applied to the edges of the holes on both sides of the fitting hole and the anchor is pushed in, and the hole 緣 slides on the toe while being pushed in such a direction that the nail is closed inward by the hole 緣. When the nail reaches below the tip of the toe, the nail is restored and opens outward and locks on the edge of the hole.

According to the cable holder of the present invention in which the holding bracket is connected to the anchor, the claws on both sides of the anchor are expanded and the toes are engaged with the hole edges, thereby preventing the holding bracket from coming off the anchor and rotating. A stop is made.

According to the fourth feature, a resin mounting portion is formed so as to protrude from a resin holding member having a plurality of downwardly opening cable holding portions integrated in a horizontal direction. Is done. As with the cable holder mounting part described above, the mounting part is filled with adhesive in a vertical hole with a bottom formed from above, and a plunger pin is inserted with its tip protruding, and the mounting part is sewered. When the plunger pin is pushed into the drill hole drilled in the inner wall of the pipe such as a pipe, the plunger pin is pushed in, and the mounting portion is adhesively fixed with the adhesive that overflows into the drill.

The cable holder of the present invention is entirely made of resin, can be integrally molded, and can be obtained at low cost.

The fifth feature is related to cable laying equipment, and the rod is supported by a work vehicle running in pipes such as sewer pipes so as to be able to move up and down. The rod has a platform at the upper end that supports the cable from below, a cable catcher that opens and closes laterally and catches the cable on the platform when closed, and the platform is formed in a mountain shape, and the cable catcher is When closed, the cable is positioned and held on top of the platform. Then, the rod is lifted up, whereby the cable captured and supported on the top of the platform by the cable catcher is lifted, pushed into the cable holder attached to the inner wall of the pipe from the opening, and inserted.

According to the present invention, the cables already inserted in the cable holder can be pushed right and left on the inclined portions on both sides of the table by lifting the table, so that the cables on the table top interfere with the already inserted cables. Inserted without being done.

The sixth feature relates to a cable laying device that allows the cable to be securely inserted into the cable holder.The work vehicle running in the pipe such as a sewer pipe has a pair of rods in the longitudinal direction of the pipe. The rods are arranged at appropriate intervals, each rod can be raised and lowered individually, and a table that supports the cable from below at the tip and a cable that opens and closes horizontally and is supported by the table when closed It has a cable catcher that captures When the cable catcher of each rod is closed and the cables are captured on the table, the cable catch The cable between the cable catchers is supported almost horizontally, and when the arms are raised, the cable between the cable catchers is lifted almost horizontally and pushed into the cable holder from the opening to be inserted.

By lifting the cable horizontally and inserting it into the cable holder, insertion into the cable holder can be performed reliably.

The stand provided for each cable catcher may be provided separately for each cable catcher, or one stand may be lengthened, and the cable catchers may be installed at the front and rear ends of the stand or the middle part of the stand. It may be provided at an appropriate interval. The seventh feature relates to a cable laying device having the same features as the sixth feature, in which a work vehicle running in a pipe such as a sewer pipe has a cable receiver for supporting the rod and the cable from below. It is supported to be able to move up and down. The rod has a base at the front end that supports the cable from below, and a cable catcher that opens and closes laterally and catches the cable supported by the base when closed. When the cable is captured, the cable is supported horizontally by the cable catcher base and the cable receiver, and when the rod and the cable receiver are raised, the cable between the cable catcher and the cable receiver is approximately ^. It is lifted in a horizontal state and pushed into the cable holder through the opening to be inserted.

The cable receiver may be capable of moving up and down independently of the rod, but is preferably connected to the rod and adapted to move up and down with the rod. As a result, the lifting mechanism is shared and the structure is simplified.

An eighth feature relates to a cable laying device having both the above-described fifth feature and the sixth or seventh feature, and in a cable laying device having the fifth feature, Either a pair of the above-mentioned rods having a base and a cable catcher at the distal end are provided at an appropriate distance in the longitudinal direction, or an appropriate distance from the rod before and after the rod is provided in the longitudinal direction of the pipe. And lower the cable A more supporting cable receiver is arranged to be able to move up and down.

The ninth feature relates to a method for moving a work vehicle in a pipe such as a sewer pipe or the like, in which a cable holder for fixing and supporting a cable drawn into the pipe to the pipe inner wall is attached to the pipe inner wall. A cable is connected to the work vehicle, and one of the cables extending forward and rearward of the work vehicle is extended, and the other is pulled out of the pipe so that the work vehicle is moved forward or backward. It was done.

To attach the cable holder to the inner wall of the pipe, for example, drill a hole in the inner wall of the pipe with the drill provided in the work vehicle as described above, then push the cable holder mounting part into the drill hole and fix it with adhesive When the pipe is made of thermoplastic resin, a method in which the cable holder is heated, pressed into the inner wall of the pipe, and fixed by fusion may be used.

The tenth feature is that the traveling vehicle moves in the pipe such as a sewer pipe, catches the cable drawn into the pipe, and hooks and attaches to the cable holder fixedly supported on the pipe inner wall. The method relates to a method in which a rope is connected to a work vehicle, and one of the ropes extending forward and rearward of the work vehicle is extended, and the other is pulled out of the pipe to pull out the work vehicle. It is designed to move forward or backward.

According to each of the above inventions, the amount of pulling of the rope and the moving amount of the work vehicle match, and the work vehicle can be reliably moved in the pipe without slipping the work vehicle by the pulling of the rope.

As the rope used in each of the above inventions, for example, a wire, a rope, a chain, or the like is used. Such a cable may be connected to the work vehicle at the intermediate portion, or may be connected to the front and rear of the work vehicle using two cables. Since the work vehicle is provided with a control cable that is connected to a control device outside the pipe, the cable extending to one of the front and rear of the work vehicle is preferably controlled. Built into the cable and integrated. If the cable and the control cable are separately provided separately, the two may be entangled during running. On the other hand, integrating both resolves such a problem.

The first feature is that the control cable connecting the work vehicle and the control device outside the pipe is towed to move the work vehicle forward and backward. That is, a cable laying work vehicle that is connected to a control device outside the pipe by a control cable and attaches a cable holder to the pipe inner wall to fix and support the cable drawn into the pipe such as a sewer pipe to the pipe inner wall is opposite to the control cable. The cable that extends to the side is connected, and the control cable is a cable with high tensile strength. The work vehicle is moved forward or backward by pulling the cable or the control cable.

Also in the present invention, the same method as described above is used as a method of attaching the cable or the cable holder to the inner wall of the pipe.

A second feature is that the connecting position of the above-mentioned cable to the work vehicle is made to coincide with the position of the center of gravity of the work vehicle, or is provided near the position of the center of gravity, preferably below the position of the center of gravity.

According to the present invention, when the work vehicle is towed by the cable, the work vehicle is prevented from overturning, and the work vehicle can be moved smoothly and reliably even if the inner wall of the pipe is slimy and slippery.

Other features and advantages of the present invention will be more clearly understood by those skilled in the art based on the description of the embodiments below. Moreover, the technical scope of the present invention is not limited to the embodiment and the drawings. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a side view of the cable laying device.

FIG. 2 is a front view of a cable holder according to the present invention. Fig. _Q Fig. 3 is a front view of another embodiment of the cable holder according to the present invention. FIG. 4 is a front view of still another embodiment of the cable holder according to the present invention. FIG. 5 is a plan view of the cable holder shown in FIG. 4 with an anchor removed.

Fig. 6 is an enlarged front view of the main part of the anchor of the cable holder shown in Fig. 4.

FIG. 7 is a front view of another example of the cable holder.

FIG. 8 is a side view of the cable laying work vehicle according to the present invention.

FIG. 9 is a diagram showing an aspect when a cable catcher catches a cable.

FIG. 10 is a diagram showing an aspect when a cable catcher catches a cable.

Fig. 11 is a side view of a cable laying vehicle that moves in a pipe by pulling a rope.

FIG. 12 is a front view of the cable laying work vehicle shown in FIG.

FIG. 13 is a schematic diagram showing an aspect when a work vehicle is towed by a cord. Fig. 14 is a cross-sectional view of a control cable incorporating a cable. BEST MODE FOR CARRYING OUT THE INVENTION

Fig. 1 shows a work vehicle 2 that runs inside a sewer pipe 1 by remote control from outside the pipe. The work vehicle 2 includes a device disclosed in Japanese Patent Application Laid-Open No. 63-71121. Drill 3 that can be moved up and down and drills holes in the pipe ceiling, Cartridge 4 that stores cable holder 1 described later, and cable holder 1 that is extruded from cartridge 4 A cable holder driving device 5 for pushing the cable holder mounting part into the hole formed by 3 and a monitor for photographing the pipe ceiling illuminated by a light (not shown) -Equipped with an art camera 6.

The cable holder 8 shown in FIG. 2 is composed of a holding bracket 11 having cable holding portions 9 on the left and right sides, and an anchor 12 for attaching the holding bracket 11 to a sewer pipe at the center. Is composed of an outer fitting 11a having a substantially C shape and an inner fitting 1lb, and both fittings 11a and 1lb are connected by an anchor 12 at the center.

The anchor 12 is made of resin, and has a support portion 12a of the holding bracket 11 at an intermediate portion, a screw portion 12b having a notched groove at an upper portion, and a vertical hole with a bottom (not shown). The support portion 12a has a circular cross section at the lower side and a rectangular cross section at the upper side. The upper part of the rectangular cross section is inserted into the rectangular holes formed in the outer fitting 11a and the inner fitting 11b, so that both fittings 11a and 11b are stopped by the anchor 12 together. Has been attached.

Although not shown in the vertical hole at the top of the anchor, when the adhesive is filled, the plunger pin 13 is inserted with its tip protruding, and when the plunger pin 13 is pushed in, the adhesive becomes vertical. It overflows from the hole. The cable holder 15 shown in Fig. 3 has a plurality of Ω (ohm) -shaped cable holders 16 that open downward and have narrowed openings, and is attached to the plate-like connecting bracket 17 at regular intervals. A rectangular hole (not shown) is formed in the center of the connection bracket 17 between the cable holders.

The anchor 18 has the same structure as the anchor 12 and, like the holding metal 11, stops the rotation of the connecting metal 17 and supports it. In the figure, reference numeral 19 denotes a plunger pin similar to the plunger pin 13 described above. In the cable holder 21 shown in FIG. 4, a pair of Ω-shaped cable holders 22 each of which is opened downward and whose opening is narrowed is connected with a connecting metal 23, and a central portion of the connecting metal 23 is formed. As shown in Fig. 5, the circular part 25 to which the upper part of the anchor 24 fits and the circular part 25 on both the left and right sides of the circular part 25 A hole consisting of a fitting portion 26 that forms a hole is formed.

The anchor 24 is made of resin, has a small diameter at the upper part to be fitted to the circular part 25, and forms a step with the lower part. The upper part has a split groove (not shown), a screw 27 is engraved on the outer periphery, and a vertical hole with a bottom formed from above is filled with an adhesive and a plunger pin 28 is provided. the upper end face of the anchor lower portion forming a plugged in and _t upper portion and the step, a pair of claws 2 9 across the upper portion is protruded obliquely upward in earthenware pots by shown in FIG. 6, symmetrical It is doing.

The claw 29 has flexibility and the upper end has a hook shape with an inverted V-shaped cross section. The upper portion of the anchor is inserted into the circular portion 25 of the hole formed in the connection fitting 23, and the fitting portion is formed. When 26 is pushed in according to the direction that matches the hook 29, the hook 29 is pushed inward at the hole edge of the fitting part 26, and the hole edge slides on the hook upper end and the hook-shaped lower end When it reaches, the claw 29 is restored and spreads outward, and is locked in the hole 緣 to stop the rotation of the connecting fitting 23 and prevent it from falling off.

The cable holder 31 shown in Fig. 7 is entirely made of resin, has a substantially U shape that opens downward, and has a claw 32 protruding inward at the opening. A small cable holder 3 4 that is formed integrally on both sides and has the same shape as the cable holder 3 3, and a drill hole 3 that is formed on the cable holder 3 3 and that is formed in the ceiling of the sewer pipe 1 The mounting part 37 has a vertical hole with a bottom (not shown) and a split groove 38, similar to the anchors 12, 18 and 24 described above. The vertical hole is filled with adhesive, and the plunger pin 39 is inserted.

Fig. 8 shows a work vehicle 41 running inside the sewer pipe 1 by remote control from outside the pipe, and the work vehicle 41 has a certain interval in the longitudinal direction of the pipe. To the work vehicle 41 so that it can move up and down. A pair of rods 42 raised and lowered by the cylinder, a light 43 illuminating the front of the pipe, a light 44 illuminating the ceiling of the pipe, and a monitor for photographing the ceiling of the pipe illuminated by the light 44 A camera 45 is mounted, and the rod 42 has a mountain-shaped base at the upper end as shown in FIG. 9, and is provided with a cable catcher 46 that can be opened and closed. The cable catcher 46 has a pair of hands 47 which are opened and closed by an opening / closing mechanism (not shown) composed of an air cylinder, as shown in JP-A-2001-28819, and the rod 42 is -After receiving the cable 48 that has been lifted up and drawn into the pipe, open the hand 47 as shown in Fig. 9 and close the hand 47 with the opening / closing mechanism, the cable 48 becomes As shown in the figure, it is positioned and held at the top of the table center. When each pair of cable catchers 46 holds the cable 48 at the top of the center of the table as shown in FIG. 10, the cable 48 is supported almost horizontally between the cable catchers. You. Thereafter, when the rod 42 rises further by a certain amount, the cable 48 held at the top of the center of the table is pushed into the cable holder 49 attached to the ceiling of the pipe through the opening 49a, and the cable 48 is pushed. Inserted into the bull holder. At this time, the mountain-shaped base pushes the cable 48 already inserted into the cable holder into the left and right so that it does not hinder the insertion of the new cable 48.

The cable laying work in the sewer pipe is performed as follows.

First, the work vehicle 2 shown in Fig. 1 is inserted from the manhole into the sewer pipe 1, and moved inside the pipe by remote control. After a certain amount of movement, it stops and a hole is drilled in the ceiling of the pipe with a drill 3 when it stops. After drilling a hole, the drill 3 is retracted, and a cable holder 49 extruded from the force cartridge 4, for example, as shown in Fig. 10 is struck out with a strip force 5, and the anchor 1 2 is removed. Push it into the drill hole and install.

Attach anchors 1 and 2 to the ceiling of the sewer pipe at appropriate intervals as described above. After that, a lead wire is passed from the manhole into the sewer pipe 1, a cable is connected to the end of the lead wire, and the lead wire is dragged by hand to pass the cable into the sewer pipe.

After that, the work vehicle 41 shown in Fig. 8 is similarly inserted from the manhole into the sewer pipe, and moved inside the pipe by remote control. Then, the ceiling of the pipe illuminated by the light 44 is photographed with the monitor-camera 45, and is monitored on a monitor television outside the pipe. When the cable holder 1 49 attached to the pipe ceiling is confirmed on the monitor TV screen, the work vehicle 41 is temporarily stopped. Thereafter, with the hand 47 of the cable catcher 46 shown in FIG. 9 open, the pair of front and rear cable catchers 46 are respectively raised by a fixed amount, and the cables 48 drawn into the pipe are connected to each cable. It is received with a hand 4 7 of one turkey tutor 46. After confirming that the hand 47 received the cable 48 on the monitor TV, close the hand 47 of each cable catcher 46, catch the cable 48 and position it at the top of the rod 42 at the top. Hold (Fig. 10).

'' The cable 48 is supported almost horizontally between the cable catchers, and when the cable catcher 46 is further raised, the cable holder 49 is attached to the ceiling of the pipe. It is pushed into and inserted. After confirming that the cable 48 has been inserted into the cable holder 1 on the monitor 1 on the television, the hand 47 of the cable catcher 46 is opened and lowered, and the cable is released. Then, the work vehicle 41 is moved again, and the above operation is repeated.

The work vehicle 51 shown in FIG. 11 corresponds to the work vehicle 2 or the work vehicle 41 described above, and has wires 52 and 53, which are ropes, connected at the front and rear. These wires 52 and 53 are connected to the work vehicle 51 below the center of gravity of the work vehicle 51, and when the work vehicle 51 is moved into the sewer pipe, -

15 5 As shown in Fig. 13, place the guide pulley 54 just below the manhole, and hang the wires 52, 53 and the control cable 55 together on the guide pulley 54. Then, the tension is applied to one of the wires 52 or 53 and the wire is pulled to pull out the other, thereby moving the work vehicle 51 into the pipe.

Since the wires 52 and 53 are connected to the work vehicle 51 below the position of the center of gravity as described above, the work vehicle 51 is tensioned from both sides by the wires 52 and 53. When the vehicle is towed, the work vehicle 51 smoothly moves without falling down while being pressed against the lower part of the pipe, without slipping even if the pipe inner wall is slimy or the pipe is inclined. It can be moved.

In another embodiment, the control cable 55 is configured to have a similar tensile strength to the wires 52, 53, and movement of the work vehicle 51 is performed by towing the control cable 55. In this case, the wire in the same direction as the control cable 55 out of the pair of wires 52 and 53 can be omitted.

Fig. 14 shows an example of a control cable having the same tensile strength as the wires 52 and 53.The fiber lobe 57 with twisted fibers is composed of a tube 58, a signal line 59 and a coaxial line. It is arranged together with 60, and its periphery is covered with a polyurethane resin 61.

Claims

The scope of the claims

1. In a cable holder for fixing and supporting a cable such as an optical fiber drawn into a pipe such as a sewer pipe to the inner wall of the pipe, a holding bracket having a plurality of downwardly-opening cable holders and a laterally extending cable, An anchor having an attachment portion which is pushed into a drill hole drilled in the inner wall of the pipe through the holding metal fitting, and a bottomed vertical hole formed from above in the attachment portion of the anchor is filled with an adhesive. A cable holder characterized in that a plunger pin is inserted with its tip protruding.

2. The cable holder according to claim 1, wherein the holding bracket is attached to the anchor by being stopped by a rotation stopping means.

3. The anti-rotation means is a claw made of a buckle body with a toe formed in an inverted V shape on both sides of the anchor, and a fitting hole formed in the holding bracket, and the claw is narrowed and fitted. Cable holder described in 2.

4. In a cable holder that fixes and supports a cable such as an optical fiber drawn into a pipe such as a sewer pipe to the inner wall of the pipe, a resin holder that has a plurality of cable holding parts that open downward and is integrated and has a lateral direction And a resin-made mounting portion protruding from the holding device and pushed into a drill hole drilled in the inner wall of the pipe, and a bottomed vertical hole formed from above in the mounting portion. The cable holder is filled with an adhesive and a plunger pin is inserted with its tip protruding.

5. A work vehicle that can run in pipes such as sewer pipes, a rod that is supported by the work vehicle so as to be able to move up and down, and that has a platform that supports cables from below, and that can be opened and closed laterally at the upper end of the rod. A cable catcher for catching the cable on the table when closed, and after catching the cable with the cable catcher, ascending while supporting the cable on the table, In a cable laying device that is inserted into a cable holder that is attached to an inner wall of a pipe with an opening facing down by pushing the cable from the opening into the cable holder, the base is formed in a mountain shape, and when the cable catcher is closed, the cable is positioned above the base. A cable laying device characterized in that the cable laying device is positioned and held.

6. A work vehicle that can travel in pipes such as sewer pipes, a rod that is supported by the work vehicle so that it can move up and down, and that has a platform that supports cables from below, and is provided at the upper end of the rod so that it can be opened and closed laterally It consists of a cable catcher that catches the cable on the table when it is closed.After catching the cable with the cable catcher, it rises with the cable supported by the table and opens on the inner wall of the pipe. In a cable laying device that is pushed into the cable holder that is attached with its part facing downward from the opening, the cable supporting base and a pair of rods having a cable catcher for catching the cable are paired in the longitudinal direction of the pipe. A cable laying device, which is provided at an appropriate distance from a cable.

7. A work vehicle that can travel in pipes such as sewer pipes, a rod that is supported by the work vehicle so as to be able to move up and down, and that has a platform that supports cables from below, and that can be opened and closed laterally at the upper end of the rod A cable catcher that catches the cable on the table when closed, catches the cable with the cable catcher, rises while supporting the cable on the table, and opens the inner wall of the pipe. In the cable laying device that is inserted into the cable holder that is attached with its part facing downward from the opening, the cable receiver that supports the cable in the working vehicle from below is the rod in the longitudinal direction of the pipe. A cable laying device, which is provided so as to be able to ascend and descend at appropriate intervals.

8. The work vehicle is provided with a pair of the above-mentioned ports having a table and a cable catcher at the tip, at an appropriate distance in the longitudinal direction of the pipe, or The cable holder according to claim 5, wherein a cable receiver for supporting the cable from below is provided at an appropriate distance from the rod in the longitudinal direction of the pipe so as to be able to move up and down.

9. In the above-mentioned method of moving the work vehicle, the cable is connected to the work vehicle by moving the inside of the sewer pipe or the like and attaching a cable holder to the inner wall of the pipe to fix and support the cable drawn into the pipe to the inner wall of the pipe. A work vehicle characterized in that the work vehicle is moved forward or backward by pulling out one of the cords extending forward and backward of the work vehicle and pulling the other out of the pipe. How to move.

10. In the method of moving a work vehicle that moves inside the sewer pipe, catches the cable drawn into the pipe, and hooks and attaches it to a cable holder fixed and supported on the inner wall of the pipe, That the work vehicle is moved forward or backward by pulling out one of the ropes extending forward and backward of the work vehicle and pulling the other out of the pipe. The feature is how to move the work vehicle.

1 1. Increase the tensile strength of the control cable extending to the work vehicle, omit the cable on the same side as the control cable, and advance the work vehicle by towing the cable or control cable on the opposite side of the control cable. 10. The method for moving a work vehicle according to claim 9, wherein the work vehicle is moved backward.

12. The method for moving a work vehicle according to claim 9 or 10, wherein the cable is connected to the work vehicle at or near the center of gravity of the work vehicle.