JP3389574B2 - A method for attaching a communication cable to an inner wall of a conduit, an attachment used in the method, an attachment device for the attachment, and a communication cable attachment device for the attachment. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a communication cable such as an optical cable to an inner wall of a pipeline when laying a communication cable such as an optical fiber in an existing pipeline such as sewer, and a fixture used for this method. The present invention relates to a device for attaching the fixture to an inner wall of a conduit and a device for attaching a communication cable.

[0002]

2. Description of the Related Art Conventionally, when a communication cable such as an optical fiber cable is laid in an existing pipeline such as a sewer, the communication cable is pressed and fixed by an anchor. Specifically, first, the plunger pin is driven into the top of the conduit, the J-type hook anchor is attached to the plunger pin, the communication cable is added to the hook portion of the J-type hook anchor, and the J-type hook is further added. The communication cable was fixed by tightening the anchor (for example, Japanese Patent Laid-Open No. 8-1
03012). An optical fiber cable is also attached to the inner wall of the conduit by a spring plate (for example, Japanese Patent Application Laid-Open No. 12-104325), and the applicant of the present application also has a patent application 20.
It has been developed as No. 00-223025.

[0003]

However, when the communication cable is laid by the former anchor, the direction in which the communication cable is pulled changes depending on the work place conditions such as the installation position of the branch pipe, or the branch pipe is added at a later date. It was not able to respond appropriately to such cases. Moreover, since the plunger pin is driven into the top of the pipe, the anchor is attached, and the adhesive is hardened with the adhesive, it takes time to solidify the adhesive. In addition, when a communication cable is added after that, it is very laborious to attach a separate anchor, and the work efficiency is not always good. When laying a trunk line and multiple branch lines at the same time,
There was a possibility that it could not be surely supported. Also in the latter case, it is difficult to lay a trunk line or a plurality of branch lines of the communication cable on the spring plate.

The present invention has been made in view of these points, and by using a leaf spring having a strong spring force, the sticking force to the inner wall of the pipe line is strong and it does not move even under high pressure cleaning in the pipe line. It is possible to withstand, and to provide a communication cable fixture that can lay a trunk line and a plurality of branch lines at the same time, and it is extremely easy to attach the communication cable fixture to the inner wall of the conduit and to attach the communication cable to the fixture, Further, the present invention provides a method for securely attaching an inner wall of a conduit of a communication cable, an attaching device and a device for attaching a communication cable.

[0005]

According to a first aspect of the present invention, a main frame is provided on an upper surface of a base supported by four traveling rollers, and a plurality of substantially semi-annular rings are formed in a traveling direction of the upper surface of the main frame. A locking frame that locks the spring plate-shaped communication cable attachments side by side is provided, and the main frame that supports the locking frame can be moved up and down by remote control,
Provided below the main frame are a plurality of locking bodies for the fixture, each of which has a hook having both ends of a horizontal narrow plate provided substantially at a right angle to the main frame and bent downward. The body can be moved up and down with respect to the main frame by remote control, and has a substantially channel-shaped cross section at either the center, right side, or left side of the lower surface of the spring plate-shaped communication cable attachment, and either one of the left and right sides can be used. On the side surface, a cable support having a door that can be opened and closed only inside and normally biased in a closed state is provided.

Then, in the conduit for installing the communication cable, the lower surface of the central portion of the spring plate of the communication cable fitting is locked to the locking frame, and both end portions are contracted inward against the spring force. The hooks on both sides of the position where the locking body is lowered to the through holes provided near both ends of the spring plate, and the main frame supporting the locking frame is raised to mount the above The tool is pressed to the top of the pipeline, the locking body is raised to release the locking of each hook of the locking body with respect to the mounting tool, and the mounting tool is moved substantially upwards in the pipeline by the elasticity of its spring. A fitting device for fitting a pipe inner wall of a communication cable, which is pressed against a half circumference to mount the fitting.

According to a second aspect of the present invention, there is provided a fixture to be attached to the attachment device according to the first aspect, in which a central portion, a right side portion, or a lower surface of a substantially semi-annular spring plate, which is slightly longer than the upper half circumference of the pipeline, A cable support with a substantially channel-shaped cross-section on either the left side and a door that can be opened and closed only inside and is normally biased in a closed state is provided on either one of the left and right sides, and communication is performed within the cable support. A conduit inner wall fitting for a communication cable to be mounted on the mounting device according to claim 1, wherein the cable is inserted and mounted on the inner wall surface of the conduit.

According to a third aspect of the present invention, the communication cable mounting portion is horizontally supported on the upper surface of the base supported by the four traveling rollers from the front and the rear, and is freely rotatable at a substantially right angle to the base by remote control. The communication cable mounting portion comprises a base portion provided with a communication cable insertion portion that has a communication cable insertion groove on the upper surface and is extendable and retractable by remote control, and a cylinder that extends and contracts the communication cable insertion portion. The insertion groove of the communication cable insertion portion has a substantially U-shaped vertical cross section, and is formed by projecting a cylindrical body of a fixed length, which is made of a flexible member and has one side of which is open from one end to the other end, at its front end. is there.

Then, the communication cable mounting portion is rotated toward the openable / closable door of the cable support of the spring plate-shaped communication cable fitting according to claim 1, which is mounted in the conduit, and the communication cable is inserted. Insert the communication cable inserted into the insertion groove of the part into the cable support by pushing the door open and inserting it into the cable support, and inserting the communication cable through the tubular body of the insertion groove of the communication cable insertion part. The communication cable mounting device according to claim 1, wherein the communication cable inserted in the groove is smoothly separated from the insertion groove.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. First, the fixture A of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a front view showing a state in which a trunk line D of a communication cable and a plurality of branch lines E are inserted into a fixture A fixed to an inner wall of a pipeline 1 of a sewer main,
FIG. 2 is a plan view of the spring plate 2 as the fixture A before bending, FIG. 3 is an enlarged sectional view perpendicular to the longitudinal direction of the spring plate 2, and FIG. 4 is a front view of the spring plate 2 in a free state. Is.

As shown in FIG. 1, a substantially semi-annular spring plate 2 that is slightly longer than the upper half circumference of the conduit 1 is provided. FIG. 4 is a front view of the spring plate 2 in a free state.
As shown in FIG. 4, the gap width between both ends 2a is made larger than the inner diameter of the conduit 1 so that the radius of curvature gradually increases from both ends 2a toward the central portion 2b. Further, as shown in FIG. 3, both end edges of the semi-annular portion of the spring plate 2 are inclined edges 2c which are bent obliquely upward and upward by approximately 30 degrees. The inclined edge 2c is designed to bite into the inner wall 1a of the conduit 1 when the fitting is attached to the inner wall 1a. In addition, as shown in FIG. 1, the lower surface of the left side portion 2d of the spring plate 2 has a hinge 3 on the side on the central side.
By a, a cable support 3 having a substantially channel-shaped section for inserting a communication cable is attached, which has a door 3b which can be opened and closed only inside and is normally biased by a spring so as to be in a closed state. Further, as shown in FIG. 2, the cable support 3 is provided at the central portion, the left side portion and the right side portion of the spring plate 2 so that the position of the cable support 3 can correspond to the change of the position of the branch pipe connected to the pipeline 1. A plurality of through-grooves 2f for locking the protruding locking pieces at both ends of one side are provided. The two holes 2e in the center of the spring plate 2 and the rectangular through holes 4 at both ends are holes for locking a locking frame of a mounting device and a spring plate holder to be described later.

In the case of this embodiment, the spring plate 2 of the fixture A is fixed to the inner wall 1a of the conduit 1 because the spring force acts on the fulcrum and the action point of the spring plate 2. The point of action is both ends 2a, and the fulcrum is the central portion 2b. The length from this fulcrum to both ends 2a of the spring plate 2 is longer than that in which the fulcrums are dispersed, and the spring plate 2 is a single plate bent in one direction. Coupled with the fact that the center is the fulcrum, the spring force is large. Further, since the spring plate 2 has a radius of curvature gradually increasing from both end portions 2a toward the central portion 2b,
When attached to the inner wall 1a of the conduit 1, the spring plate 2 is attached to the inner wall 1a.
The whole is in close contact and there is no gap. In addition, since both edges of the semi-annular portion of the spring plate 2 are inclined edges 2c and have edges as shown in FIG. 3, when the fitting A is attached to the inner wall 1a of the conduit 1, The spring force of the spring plate 2 causes the inclined edge 2c to bite into the inner wall 1a, so that the inclined edge 2c is more firmly attached.

Next, an attachment device B for attaching the attachment A to the inner wall 1a of the conduit 1 will be described with reference to FIGS. FIG. 5 is a plan view of the mounting device B,
6 is a right side view of the mounting device B, FIG. 7 is a front view, FIG. 8 is an enlarged end view taken along line AA in FIG. 6, and FIG. 9 is an enlarged rear view. The mounting device B includes a base 5 that supports the entire device, a locking frame that locks the mounting device A, a main frame that supports the locking frame, a front portion including a television camera, and a solenoid box.

There are two bases 5 at the front and rear of the mounting device B, each of which is a substantially channel type and supports a pair of traveling rollers 6, and an air cylinder 7 is mounted on the upper surface of each base 5. Each of the air cylinders 7 is provided with a piston rod 8 which can project from the lower surface of the air cylinder 7. The lower ends of the piston rods 8 are fixed to the upper surface of the substantially channel-shaped base 5, and the air cylinders 7 are Guide bars 11 having lower ends fixed to the upper surface of the base 5 are slidably provided on both sides of the lower surface of the. The front and rear air cylinders 7 have a locking frame 9 and a main frame 1 supporting the locking frame 9.
2. Solenoid box 1 following these
0 and a front part are integrally provided, and these can be moved up and down by operating the front and rear air cylinders 7 to expand and contract the piston rods 8.

The locking frame 9 is in the shape of a horizontally long plate, and is erected on a substantially channel type main frame 12, and the main frame 12 is provided on a horizontally long plate 13. ing. On the upper part of the locking frame 9, there are provided five rectangular recesses 14 at regular intervals in order from the front to accommodate the cable support 3 provided on the lower surface of the fixture A when the fixture A is covered. Each recess 14
Pins 9a for locking the fixture A are provided on the upper end surfaces of the locking frames 9 on both sides of each. Main frame 1
Both sides of 2 are raised edges 12a.

On the main frame 12,
Air cylinders 15 for releasing the fixture A are mounted respectively at positions below the recesses 14 of the locking frame 9, and the compressed air is supplied to the air cylinders 15 above the air cylinders 15. Is provided with an air intake port 15a and an air exhaust port 15b for sending air.
Piston rods 16 hang downward from the lower surface of the penetrating main frame 12 and plate body 13. These piston rods 16 correspond to the air cylinders 15 described above.
It is designed to move up and down by each piston rod 1
At the lower end of 6, there is provided a spring plate retainer 17 having a hook 17a in which both ends of a horizontal plate extending in a direction substantially perpendicular to the main frame 12 are bent downward, and this spring plate retainer 17 is operated remotely. Thus, the air cylinder 15 can be operated to move up and down via the piston rod 16. At that time, two guide pins 18 are provided from the lower surface of the main frame 12 to both sides of the biston rod 16 so that the spring plate retainer 17 does not rotate.
And their lower ends are always penetrated by the through holes of the spring plate retainer 17. A plurality of spring plate supports 13a are respectively provided on the plate bodies 13 on both sides between the adjacent air cylinders 15, and the recesses between the spring plate supports 13a are attached to the attachment device B by a fixture. It is a fitting groove 19 into which the A spring plate 2 is fitted.

Further, in the front part of the mounting device B, two plate bodies 20 are erected so as to be opposed to each other, and through holes 20a for pulling are provided at the tip ends of the two plate bodies 20, respectively. A plate body is passed over the upper surface of the body 20, and one TV camera 21 is mounted on the upper surface of the body device 20 to look forward when the mounting device B is moving in the pipeline, and two lights 22 are mounted on both sides thereof. A work TV camera 23 and one light 24 are mounted rearward. Further, the solenoid box 10 provided at the rear part of the mounting device B is provided with a cable 10a for supplying electric power and the like on the upper surface thereof, and a coupler for supplying air pressure and an exhaust port. Further, a hook 25 having a through hole 25a for pulling is provided on the back surface of the air cylinder 7 on the rearmost base 5.

Next, a mounting device C for mounting and mounting the communication cable on the mounting device A mounted on the conduit inner wall 1a by the mounting device B will be described with reference to FIGS. 10 is a plan view of the mounting device C, FIG. 11 is a right side view of the mounting device C, FIG. 12 is a front view, and FIG. 13 is a partial cross-sectional explanatory view of a communication cable mounting portion. FIG. 14 is an explanatory diagram showing a state in which a hose is attached to the tip of the communication cable insertion portion, and FIG. 15 is a BB line in FIG.
It is a line end view. The mounting device C includes a base that supports the entire mounting device C, a communication cable mounting portion, a gear motor, a front portion including a television camera, and a solenoid box.

The base 31 is supported by a pair of traveling rollers 32 at the front and rear of the mounting device C, and the base 31 between these traveling rollers 32 is horizontally long and has a cross-section ship bottom type. A substantially trapezoidal support frame 33 is erected in the front and rear at a substantially central portion of the upper surface of the base 31, and a communication cable mounting portion 34 is attached to the base 31 by a shaft passed between these two support frames. It is provided so that it can be rotated by remote control in the direction perpendicular to.

The communication cable mounting portion 34 is box-shaped, has an air cylinder 35 in the center, and the air cylinder 35.
Guide pipes 40 on both sides of the
0 has a guide pin receiving portion 37a on each outer side. A piston rod 36 is projected from the upper surface of the air cylinder 35, and a communication cable insertion portion 39 is supported on the upper end of the piston rod 36. The communication cable insertion portion 39 is
On the long piece-shaped pedestal 39a, the grip portion 39 having a substantially U-shaped vertical section is provided.
b, the upper end of the expandable piston rod 36 is fixed to the pedestal 39a, and guide pins 37 are provided on both sides of the piston rod 36 from the lower surface of the pedestal 39a.
Respectively and are slidably inserted into the respective guide pin receiving portions 37a of the communication cable mounting portion 34. The grip portion 39b is mounted on the pedestal 39a, but two long pins 40a are hung from the bottom surface of the grip portion 39b. It is slidably inserted in each guide pipe 40 of 34. The expansion / contraction of the piston rod 36 is performed by remote control. At the tip of the grip portion 39b, a hose 4 of a certain length that bends vertically and horizontally as shown in FIG.
1 is projected. The hose 41 has a notch formed from one end to the other end on the upper portion thereof, and the tip portion of the hose 41 is supported by a substantially U-shaped support body 42 provided at the tip of the protruding arm 42a protruding from the tip of the grip portion 39b. I am letting you.

A geared motor 43 for rotating the communication cable mounting portion 34 is provided behind the communication cable mounting portion 34. The communication cable mounting portion 34 of the larger one of the support frames 33 supporting the communication cable mounting portion 34 which is provided at the rear side.
Two sensors 33a for regulating the rotation angle of the communication cable mounting portion 34 are provided on the side surface. A solenoid box 44 is provided at the rear of the geared motor 43, and a work television camera 45 and a light 46 are mounted on the upper surface of the solenoid box 44 toward the front. The hook 47 having the through hole 47a is provided. Further, the foremost part of the mounting device C is a front part, and two plate bodies 48 are erected so as to face each other, and through holes 48a for pulling are provided at the tip ends of the two plate bodies 48, respectively. The plate bodies are passed over the upper surfaces of the plate bodies 48, and one television camera 49 that looks forward when the mounting device C is moving in the pipeline is mounted on the upper surface and two lights 50 are mounted on both sides.

FIG. 16 is a schematic view showing an example of a piping state of a sewer main pipe and a branch pipe, and the left and right views are explanatory views of a vertical cross section in the pipe line 1 at a corresponding portion. In the pipeline 1 of the sewer main, a main line D is inserted from a manhole 53 to an adjacent manhole (not shown, the same applies below), and a branch pipe (from the upper side of one of the left and right in the middle of the pipeline 1 ( A drainage pipe) 51 is connected to each branch pipe 51, and a branch line E of one communication optical fiber cable is bent and led out from the pipe line 1 to each branch pipe 51. Each of these branch lines E is a manhole 53 and is connected to the trunk line D.
Here, one trunk line D that passes through the pipeline 1 and a plurality of branch lines E that are optical fiber cables that are introduced from the domestic drainage basin 52 into the pipeline 1 via the branch pipe (drain pipe) 51 are provided. A method of inserting the pipe 1 into the cable support 3 of the fixture A and mounting it on the inner wall of the pipe 1 will be described.

First, by the mounting device B,
A plurality of fixtures A, each having a cable support 3 attached in advance, are attached to predetermined positions in the conduit 1. Below,
For convenience of explanation, this fixture A will be explained in the case of sequentially attaching from the farthest attachment position to the closest attachment position from the manhole 53, and using the fixture A having the cable support 3 on the left side. To do. First, both ends 2a of the spring plate 2 of the fixture A are contracted inward against the spring force, and in this state, they are covered on both sides of the recess 14 of the locking frame 9 of the attachment device B, and each pin 9a is attached to the spring plate. Two holes 2
Insert into e. Then, both ends of the spring plate 2 are fitted into the fitting grooves 19 of the plate body 13, and the hooks 17a of the spring plate retainer 17 are engaged with the through holes 4 at the lower end of the spring plate 2. This time,
The spring plate retainer 17 is kept in a state of being lowered downward.

With the desired number of fixtures A mounted in the pipeline 1, the attachment device B is inserted into the pipeline 1 of the sewer main from the manhole 53 side as shown in FIG. Then, while confirming with the TV camera 21 mounted on the mounting device B, the mounting device B is pulled and advanced from a manhole (not shown) in the front, and the branch pipe E is moved to the right side which is the target position.
Make sure you reach where it was connected. Then, compressed air is sent to the front and rear air cylinders 7 of the mounting device B, the front and rear piston rods 8 are lifted to lift the entire device, and as shown by the arrow in FIG. It presses against the pipe top inside the said pipeline 1. Further, as shown by the arrow in FIG. 19, when the spring plate retainer 17 is raised, the hooks 17a on both sides are disengaged from the through holes 4 at both ends of the spring plate 2, and the both ends of the spring plate 2 are unlocked. The spring force of the lever spreads outwards, and as shown in Fig. 20,
It is pressed and fixed to the inner wall 1a of the conduit 1.

As shown in FIG. 20, the mounting device B without the mounting tool A lowers the front and rear air cylinders 7 to lower the entire device such as the locking frame 9 and the main frame 12. Next, the mounting device B is moved toward the manhole 53, the second mounting fixture A of the retaining frame 9 of the air cylinder 7 is aligned with the next target location, and mounting is performed in the same manner as described above. Connect a plurality of other fixtures A in this order to the inner wall 1 of the conduit 1.
Attach to a.

Thereafter, a plurality of communication cables are attached to the fixture A using the attachment device C. For convenience of explanation, the branch line E which is an optical fiber cable is attached to the manhole 53 as shown in FIG. An example will be described in which the branch pipe 51 on the left side closest to the above is installed. First, the branch line E is arranged from the manhole 53 to the branch pipe 51 on the left side closest to the manhole 53 by applying an ordinary wire passing technique. The branch cable E, which is an optical fiber cable to be mounted, is inserted into the communication cable insertion section 39 of the communication cable installation section 34 of the installation apparatus C, and the installation apparatus C is inserted in the communication cable insertion section 39. Is pulled forward from a manhole (not shown) in the front, and is advanced to enter into the pipeline 1 of the sewer main from the manhole 53. At that time, proceed while checking the front with the TV camera 49 mounted on the mounting device C,
Confirm that the target position is reached before the position where the branch pipe 51 is connected to the left side. At this time, the mounting device C is stopped at a position immediately after passing through the cable support 3 of the fixture A previously attached.

Then, compressed air is sent to the air cylinder 35, the communication cable insertion portion 39 is extended to reach the pipe top as shown in FIG. 21 (the fixture A and the cable support 3 are not shown), and further shown in FIG. As described above (the fixture A and the cable support 3 are not shown), the communication cable mounting portion 34 is rotated by operating the geared motor 43 to press and open the openable door 3b of the cable support 3 of the fixture A to open the cable. The branch line E is advanced into the support 3. At this time, when the branch line E inserted through the communication cable insertion portion 39 is further rotated, it comes into contact with the other side surface of the cable support 3. The door is configured so as not to open from the inside of the cable support 3.

As a result, the branch line E is attached to the cable support 3 of the fixture A. After this, the mounting device C is further advanced in this state in the pipe line 1 and is advanced to near the position where the branch pipe 51 is provided. At this time, at the tip of the communication cable insertion portion 39, as shown in FIG.
Since the installed branch line E is provided with 1, the hose 41 bends at the bent portion of the branch line E itself, and the branch line E is pulled out from the opening portion and is detached from the communication cable insertion portion 39. Then, as shown in FIG. 23 (the fixture A and the cable support 3 are not shown), the communication cable mounting portion 34 is rotated in the opposite direction to the position of the pipe top, as shown in FIG. A and the cable support 3 are not shown) Compressed air is discharged from the air cylinder 35, whereby the pedestal 39a first descends, and then the grip 39b also descends, and the communication cable insertion portion 3
9 is the lowest position.

When the optical fiber cable (branch E) is completely attached, the optical fiber cable is temporarily returned to the manhole 53, the optical fiber cable to be attached next is inserted into the conduit 1, and the optical fiber cable is inserted into the communication cable insertion portion 39. Then, the inside of the pipeline 1 is advanced to a desired position and the above-mentioned work is performed. The above work is carried out in the left or right position in the pipeline 1 of the sewer main, and the optical fiber cables are sequentially attached to the plurality of fixtures A already attached.

In the above description, the mounting of the branch wire E on the fixture A has been described for the sake of convenience, but in a specific work procedure, an optical fiber cable (branch wire E) bent from the branch pipe 51 and led out to the conduit 1 is provided. Before attaching the attachment to the fixture A, first insert the trunk line D from the manhole 53 to the adjacent manhole, and then use the attachment device C to attach the trunk line D first to the fixture A.
Put on. In this case, it may be mounted by advancing from the manhole 53 side to the back side, or may be mounted by retreating from the back side to the manhole 53 side. After that, the procedure is to attach the branch wire E to the fixture A.

In the above description, the case where one communication cable is attached is explained for convenience of explanation, but the number is not limited to one, and
It is also possible to attach a plurality of communication cables such as a book and three at once. When there is one communication cable, the communication cable mounting device C can be moved forward or backward to mount the communication cable, as in the case of the trunk line D. When attaching a plurality of communication cables, as shown in FIG. 16, each branch line E is provided between the manhole 53 and each branch pipe 51 in advance, and then a plurality of communication lines are installed at the entrance of the manhole 53. The communication cables are held by the hose 41 and the communication cable insertion portion 39 and moved forward to mount the plurality of communication cables. However, in the branch pipe 51 portion connected to the conduit 1, only the predetermined branch line E is disconnected. Advance. By mounting a plurality of communication cables at the same time, the number of times the communication cables are inserted and the communication cables are sequentially mounted can be reduced, which can significantly reduce construction costs. In addition, when the housing complex is newly built and it becomes necessary to add a new communication cable, the communication cable can be easily attached to the cable support 3 at a later date.

In the above-described embodiment relating to the fixture A, the fixture A is attached to the inner wall 1a of the pipeline 1 of the sewer main, but the pipeline 1 is not limited to the sewer, and may be any suitable pipe. It can be used for all pipes including fume pipes, ceramic pipes and vinyl chloride pipes, including pipes, regardless of the type of material. Further, in the above embodiment, the air cylinder is used to move the main frame and the spring plate retainer up and down, but these raising and lowering means may be appropriate. Furthermore, in a pipeline to which a branch pipe or the like is not connected, a communication cable may be attached to the top of the inside of the pipeline using the fixture A. Further, in FIG. 16, a large number of fixtures A are attached, but this merely shows that an arbitrary number can be attached. Further, the interval between the fixtures A may be about 1 m, but can be changed appropriately depending on the number of communication cables and the like.

[0033]

According to the invention of claim 1, it is possible to securely and easily attach the spring plate-shaped communication cable fixture to the inner wall of the pipe by advancing the attachment device into the pipe and remotely. Therefore, it can be performed extremely easily by remote control even in a narrow pipeline. Further, since the cable support is provided on the lower surface of the spring plate and the communication cable is inserted through the cable support to be mounted, a plurality of communication cables can be supported, both main lines and branch lines. Furthermore, even if a communication cable is added at a later date, the communication cable can be supported by the existing fixture. Further, according to the invention of claim 2, one spring plate is bent in one direction, and the spring force of this spring plate is used to press and fix it to the inner wall of the conduit, so it is extremely strong. Since it can be fixed, it can sufficiently withstand high-pressure cleaning in the pipeline. In addition, a cable support is provided on the lower surface of the spring plate, which has a channel-shaped cross section and has a door on one side that can be opened and closed only inside and is normally biased in a closed state. Therefore, it is possible to more reliably support a plurality of communication cables, both main lines and branch lines. Further, the position where the cable support is provided can be changed depending on the arrangement of the attached branch pipe or the like, so that various measures can be taken.

According to the invention of claim 3, in addition to the above effect, the communication cable mounting portion is advanced into the pipeline, and the communication cable is attached to the cable support of the communication cable fitting previously mounted in the pipeline. Since the communication cable is attached by rotating the insertion portion, the communication cable can be attached reliably and easily. Furthermore, since a tubular body made of a flexible member having a notch on the upper surface is provided at the front end of the communication cable insertion portion, even if the communication cable is bent immediately before the communication cable is attached to the cable support. The communication cable can be detached from the communication cable insertion portion extremely smoothly, and the work of attaching the communication cable to the fixture can be performed more easily.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a trunk line and a plurality of branch lines of a communication cable are inserted and supported by a fixture fixed to an inner wall of a sewer main according to an embodiment of the present invention.

FIG. 2 is a plan view of a spring plate, which is a fixture in the embodiment of the present invention, before being bent.

FIG. 3 is an enlarged cross-sectional view perpendicular to the longitudinal direction of the spring plate according to the embodiment of the present invention.

FIG. 4 is a front view of the spring plate of the fixture in the free state according to the embodiment of the present invention.

FIG. 5 is a plan view of the attachment device according to the embodiment of the present invention.

FIG. 6 is a right side view of the attachment device according to the embodiment of the present invention.

FIG. 7 is a front view of the attachment device according to the embodiment of the present invention.

FIG. 8 is a sectional view taken along line AA in FIG. 6 showing an embodiment of the present invention.
It is a line expansion end view.

FIG. 9 is an enlarged rear view of the attachment device according to the embodiment of the present invention.

FIG. 10 is a mounting device C according to an embodiment of the present invention.
FIG.

FIG. 11 is a right side view of the mounting device according to the embodiment of the present invention.

FIG. 12 is a front view of the mounting device according to the embodiment of the present invention.

FIG. 13 is a partially exploded cross-sectional explanatory view of the communication cable mounting portion of the mounting device according to the embodiment of the present invention.

FIG. 14 is an explanatory diagram showing a state in which a hose is attached to the tip of the communication cable attachment portion of the attachment device according to the embodiment of the present invention.

15 is an end view taken along line BB in FIG.

FIG. 16 is a schematic view of an example showing a piping state of a sewer main pipe and a branch pipe in the embodiment of the present invention.

FIG. 17 is an explanatory view in which a spring-shaped fixture A is attached to the attachment device B and arranged in the pipe line in this state in the embodiment of the present invention.

FIG. 18 In the embodiment of the present invention, after the spring-shaped fixture A is pressed against the pipe top of the pipeline, the locking frame and the like of the attachment device B to which the spring-shaped fixture A is attached are raised. It is explanatory drawing of the made state.

FIG. 19 is a view showing a state where the spring plate retainer of the attachment device B is raised to remove the hooks on both sides from the through holes of the spring plate and the fixture A is being attached to the inner wall of the conduit in the embodiment of the present invention. FIG.

FIG. 20 is an explanatory diagram showing a state in which a spring-shaped fixture A is attached to the inner wall of the pipe by the attachment device B in the embodiment of the present invention.

FIG. 21 is an explanatory view showing a state in which a communication cable is inserted into the communication cable insertion portion of the mounting device C, the communication cable insertion portion is extended and pressed against the pipe top of the pipe line in the embodiment of the present invention. is there.

FIG. 22 is an explanatory diagram showing a state in which the communication cable is inserted into the communication cable insertion portion of the embodiment of the present invention, and is pressed against the top of the pipe, and then rotated.

FIG. 23 is a view showing an embodiment of the present invention in which the communication cable is mounted on the cable support of the fixture A and then the communication cable insertion portion of the mounting device C is rotated to return to the position of the pipe top of the conduit. FIG.

FIG. 24 is an explanatory view showing a state in which the communication cable insertion portion of the mounting device C is contracted after the communication cable is mounted on the cable support of the fixture A in the embodiment of the present invention.

[Explanation of symbols]

A Fixture 1 Pipe 2 Spring plate 3 Cable support 4 Through hole 5 Base 6 Traveling roller 7 Air cylinder 9 Locking frame 12 Main frame B Mounting device C Mounting device 31 Base 32 Traveling roller 34 Communication cable mounting part 38 Base part 39 Communication cable insertion part 41 Hose D Main line E Branch line

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H02G 9/00 G02B 6/00 351 (72) Inventor Kazuhito Sone 4-83 33, Shibaura, Minato-ku, Tokyo Electrician (72) Inventor Hideki Okada 4-7-20 Toyo Co., Ltd., Koto-ku, Tokyo Inside Doi Manufacturing Co., Ltd. (72) Inventor Tsuneo Shinohara 4-7-20 Toyo, Koto-ku, Tokyo Inside Doi Manufacturing (72) ) Inventor Masayasu Imai 3-14-2 Ueno, Taito-ku, Tokyo Inside Yasuda Manufacturing Co., Ltd. (72) Inventor Shoichi Motoyama 3-14-2 Ueno, Taito-ku, Tokyo Inside Yasuda Manufacturing (56) References JP-A-8-103012 (JP, A) JP-A 62-230311 (JP, A) JP-A 11-252765 (JP, A) JP-A 11-285137 (JP, A) JP-A 63-7121 (JP, A) (58) Survey The field (Int.Cl. ^7, DB name) H02G 1/06 H02G 9/00 G02B 6/46

Claims (3)

(57) [Claims] 1. A main frame is provided on an upper surface of a base supported by four traveling rollers, and a plurality of substantially semi-annular spring plate-shaped communication cable fittings are arranged side by side in a traveling direction of the upper surface of the main frame. A locking frame for stopping is provided, and a main frame supporting the locking frame can be vertically moved up and down by remote control. A horizontal narrow plate body is provided below the main frame at a substantially right angle to the main frame. Is provided with a plurality of locking bodies for the fitting having hooks whose both ends are bent downward. The locking bodies can be moved up and down with respect to the main frame by remote control, and the spring plate-shaped communication cable fitting is provided. A case having a substantially channel-shaped cross section at any of the central portion, the right side portion, or the left side portion of the lower surface of the case, and having a door that can be opened and closed only inside and is normally biased in a closed state on any one of the left and right side surfaces. In the pipeline where the communication cable is installed, the lower surface of the central part of the spring plate of the communication cable fitting is locked to the locking frame, and both ends are compressed inward against the spring force. However, the hooks on both sides of the position where the locking body is lowered are locked in the through holes provided near both ends of the spring plate, and the main frame supporting the locking frame is lifted. The fixture is pressed against the top of the pipeline, the locking body is raised to release the lock of each hook of the locking body with respect to the fixture, and the elasticity of the spring causes the fixture to move substantially within the pipeline. An attachment device for attaching a fitting to an inner wall of a conduit of a communication cable, characterized in that the fitting is attached by being pressed against the upper half of the circumference. 2. A mounting tool to be mounted on the mounting device according to claim 1, which is any one of a central portion, a right side portion and a left side portion of a lower surface of a substantially semi-annular spring plate which is slightly longer than an upper half circumference of the conduit. In addition, a cable support having a substantially channel-shaped cross section and having a door that can be opened and closed only inside and is normally biased in a closed state is provided on either one of the left and right sides, and the communication cable is inserted into the cable support. The conduit inner wall fitting for a communication cable to be mounted on the fitting device according to claim 1, wherein the fitting is mounted on the inner wall surface of the conduit. 3. A communication cable mounting portion is horizontally supported from the front and rear on a top surface of a base supported by four traveling rollers and is rotatably provided at a substantially right angle to the base by remote control, and the communication is carried out. The cable installation part has a communication cable insertion part that has a communication cable insertion groove on the top surface and is expandable and contractible by remote control.
The communication cable insertion portion comprises a base portion provided with a cylinder that expands and contracts, and the insertion groove of the communication cable insertion portion has a substantially U-shaped vertical cross section at its front end, and one side of the upper part made of a flexible member from one end. The tubular body of a constant length that is open to the other end is projected, and the tubular body is attached to the inside of the conduit toward the openable / closable door of the cable support of the spring plate-shaped communication cable attachment according to claim 1. Rotate the communication cable attachment part and insert the communication cable inserted into the insertion groove of the communication cable insertion part into the cable support by pushing the door open and attach it to the cable support. The communication cable mounting device according to claim 1, wherein the communication cable inserted into the insertion groove is smoothly removed from the insertion groove via the tubular body of the insertion groove.