JPH03277896A - Device for insertion of cable into pipe - Google Patents

Abstract

PURPOSE:To smoothly change a direction of a cable end in the axial direction thereof by providing a guide plate on an insertion guide cylinder, also providing a moving member on the guide plate, connecting the moving member to the guide plate by means of a link, and arranging a moving means for moving the moving member. CONSTITUTION:A cable insertion device 5 is made up of a cable drum 7 around which a cable 6 is wound, a sealing apparatus 8, a pressure-resistant hose 9, a cable delivery apparatus 10 for the delivery of the cable 6 into a pipe passage 1 by rollers, an emergency interruption valve 11, an insertion outer cylinder 12, and an insertion guide cylinder 13 inserted into the insertion outer cylinder 12. A guide plate 18 which is oscillatable in an axial direction and a tilting direction is provided on the insertion guide cylinder 13. A moving member is connected to the guide plate 18 by means of a link 23 to move a movable blacket 20. As a result, the direction of the cable is easily changed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for inserting a cable into a pipe, and in particular, a cable with relatively high rigidity, such as a cable used in an inside pipe construction method using a TV right camera, is connected to a branch provided in a pipe. The present invention relates to an apparatus for inserting a cable into a pipe, which is suitably used when inserting a cable into a pipe.

Conventional Technology Traditionally, as a method of inspecting the condition of fluid such as water flowing inside a pipe, a cable with a TV right camera attached to the tip is inserted into the pipe from the branch pipe section for installing a fire hydrant.
A pipe inspection method is known in which the inside of the pipe is inspected by looking inside the pipe using the TV right camera.

The cable insertion device used in this pipe internal construction method, for example, clamps the cable with a feed roller and feeds out the cable by rotating the feed roller.
It is configured to be passed from a branch tube into an insertion guide tube inserted into the tube in a direction perpendicular to the tube, and inserted into the tube from the tip of the insertion guide tube.

Problem to be Solved by the Invention However, in the conventional configuration as described above, when inserting a relatively rigid cable into a pipe, the tip of the cable is fed into the pipe from the tip of the insertion guide tube in a direction perpendicular to the pipe. When this happens, it is difficult to change the direction of the cable tip in the axial direction of the tube, and the cable tip hits the tube wall, making it difficult to insert it smoothly.

Therefore, it is conceivable to provide a guide plate at the tip of the insertion guide tube to change the direction of the tip of the cable. but,
Since it is necessary to pass the insertion guide tube through the branch pipe, the guide plate cannot be made to protrude beyond the cross section of the insertion guide tube, which creates a new problem in that the effect of changing the direction of the cable tip cannot be fully demonstrated. occurs in

SUMMARY OF THE INVENTION The present invention solves these problems and provides a device for inserting a cable into a pipe, which allows the direction of the tip of the cable to be smoothly changed in the direction of the narrow end of the pipe at the tip of the insertion guide tube. purpose.

Means for Solving the Problems In order to achieve the above object, the present invention provides a cable insertion device that inserts an insertion guide tube into the tube from a branch tube provided in the tube, passes the cable through the insertion guide tube, and inserts the cable into the tube. In this case, a guide plate is provided at the tip of the insertion guide tube, which can swing between a posture substantially along the fine direction of the insertion guide tube and an inclined posture protruding diagonally forward, and the guide plate is provided on the back side of the guide plate. A moving member movable in the axial direction of the guide tube is provided, the moving member and the guide plate are connected by a link, and a moving means is provided for moving the moving member by operating an operating shaft passed through the insertion guide tube. It is something that

Effect: According to this configuration, when the operating shaft is operated to move the moving member by the moving means after the distal end of the insertion guide tube is positioned inside the tube, the guide plate protrudes forward via the link. It becomes a tilted posture.

Therefore, when the cable is sent out into the insertion guide cylinder and the tip of the cable reaches the guide plate, its direction is changed to the narrow direction of the tube along the inclined guide plate. Therefore, the cable can be smoothly inserted into the pipe. When the guide plate is returned from the inclined position to its original position, it is possible to fit the guide plate within the cross section of the guide tube.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

First, the pipe endoscopic construction method will be explained with reference to FIG. Here, 1 is a conduit for water supply etc. buried underground, and pits 2 for underground fire hydrants are formed at appropriate distances above the conduit. A branch pipe 3 is led from the pipe line 1 into the pit 2, and a fire hydrant (not shown) is attached to the upper end of the branch pipe 3 via an auxiliary valve 4. When carrying out the pipe internal inspection method, the sub-valve 4 is closed, the fire hydrant is removed, and the cable insertion device 5 is connected to the sub-valve 4 as shown.

The cable insertion device 5 includes a cable drum 7 around which a cable 6 to be inserted into the conduit 1 is wound, a two-part sealing device 8 that allows the cable 6 to pass through the conduit 1 while maintaining a seal inside the conduit 1, and a cable drum 7 that wraps the cable 6 to be inserted into the conduit 1. A pressure-resistant hose 9 for passing the cable 6 through the pipe, and a cable feeding device ff1l ( l, an emergency cutoff valve 11 interposed between the lower end of the cable feeding device 10 and the sub-valve 4, and an insertion outer cylinder 1.
2, and an insertion guide tube 1 inserted into the insertion outer tube 12.
3.

An operating shaft 14 is attached to the insertion guide cylinder 13 so as to pass through the cable feeding device 10 and protrude upward, and after opening the sub valve 4, the insertion guide cylinder 13 in the insertion outer cylinder 12 is inserted into the sub valve 4. It is configured to be inserted into the conduit 1 through the branch pipe 3. Further, a guide device 15 is provided at the lower end of the insertion guide tube 13, which can be operated by an operating shaft I4, and bends the cable 6 in a right angle direction.
It is configured to feed out in the axial direction. The cable 6 has TV cameras and lights installed at appropriate intervals from its tip.

A plurality of large-diameter block-shaped bodies 6a such as control devices are attached.

Next, the configuration of the guide device 15 provided at the lower end of the insertion guide tube I3 will be explained with reference to FIGS. 1 to 3. At the lower end of the insertion guide tube 13, approximately half of its peripheral wall is cut out to form an opening 16 that is wide open laterally.

A support block 17 is attached to a portion of the insertion guide tube 13 corresponding to the lower half of the opening 16, and the upper end of the guide plate 18 is attached to the support shaft 1 at an intermediate position of the support block 17.
It is swingably attached at 9. The guide plate 18 is
It is formed to a size that fits within the cross section of the insertion guide tube 13. A movable bracket 20 that can be moved up and down along the guide groove 21 is provided at the support block 17 on the back side of the guide plate 18 . One end of a link 23 is connected to this movable bracket 20 by a pin 22, and the other end of this link 23 is connected to a bracket 24, which is attached to the lower back surface of the guide plate 18. As a result, as the movable bracket 20 moves up and down, the guide plate 18 can be placed in an almost vertically downward position as shown by the solid line in FIG. It is configured to oscillate between. The movable bracket 20 is guided in the vertical direction by fitting both ends of a pin 22 into a guide groove 21, as shown in FIG.

A connecting shaft 25 is connected upward to the movable bracket 20, and a nut body 26 is fixed to the intermediate portion thereof.

A screw shaft 27 that is parallel to the connecting shaft 25 and rotatable is provided on the upper part of the support block 17, and a nut body 26 is screwed onto the screw shaft 27. The lower end of the operating shaft 14 is fixed to the boss portion 27a at the upper end of the screw shaft 27. 28
a and 28b are slide bearings provided at the upper and middle portions of the support block 17, and support the connecting shaft 25. 29a is the bearing at the lower end of the screw shaft 27, 29b is the operating shaft 1
This is the bearing at the lower end of No. 4.

The upper end of the second guide plate 3G is swingably attached to the upper end front part of the support block 17 via a support shaft 31.

Like the guide plate 18, this second guide plate 30 is formed to a size that fits within the cross section of the insertion guide cylinder 13, and has a spring 32.
The lower end thereof is brought into contact with the upper or central portion of the guide plate 18. A fixed guide plate 33 is provided diagonally above the upper end of the support block 17. opening 1
A roller 34 is attached to the upper edge of the cable 6 so that the block-shaped body 6a of the cable 6 does not get caught when being pulled up.

In such a configuration, when internally inspecting the inside of the pipeline 1, from the state where the fire hydrant 40 is installed as shown in FIG. 5(a), to the sub-assembly as shown in FIG. 5(b), After closing the valve 4, remove the fire hydrant 40 and insert the outer cylinder 12 into the sub-valve 4.
and install the cable insertion device 5 as shown in FIG. Next, open the sub-valve 4 and insert the outer cylinder 1 with the operation shaft 14.
The insertion guide cylinder I3 in 2 is lowered, and its tip is inserted into the pipe line 1 through the auxiliary valve 4 and the branch pipe 3. At this time, since the guide plate 18 and the second guide plate 30 are housed in the insertion guide tube 13, the insertion is performed without any problem. Thereafter, when the operating shaft 14 is rotated to rotate the screw and shaft 27, the nut body 26 is lowered and the movable bracket 20 is lowered via the connecting shaft 25. From the state shown by the solid line in the figure, the insertion guide tube 13 assumes an inclined position protruding diagonally forward from the insertion guide tube 13 as shown by the imaginary line. Along with this, the second guide plate 30 also tilts forward as shown by the imaginary line, and the fixed guide plate 331, the second guide plate 30, and the guide plate 18 change the inclination angle with the horizontal direction from above to below. A guide surface is formed that is bent in three stages so that the curve gradually becomes gentler.

In this state, the cable 6 is fed into the insertion guide tube 13 via the insertion outer tube 12 by the cable/feedout device IO.

When the tip of the cable 6 reaches the position of the guide device 15,
Since the guide surface is bent in three stages as described above, the tip of the cable 6 smoothly changes direction toward the axial center of the conduit 1, and as shown in FIG. 5(C), the cable 6 is It is reliably fed into the pipe line 1, and the inner surface of the pipe line 1 is inspected using a TV right camera provided on the block-shaped body 6a.

When the inspection is completed, the cable feeding device 10 is operated in the opposite direction to pull up the cable 6.

Thereafter, when the operating shaft I4 is rotated in the opposite direction, the movable bracket 20 rises and the guide plate 18 returns to the vertical position, and the second guide plate 30 also returns to its original position.
Both fit within the cross section of the insertion guide cylinder 13 again. After that, by pulling up the operation shaft 14, the insertion guide tube 1
3 is extracted from the branch pipe 3 and the sub-valve 4. lastly,
The inspection work is completed by closing the sub-valve 4, removing the insertion tube 12, and attaching the fire hydrant 40.

Effects of the Invention As described above, according to the present invention, when the distal end of the insertion guide tube is positioned in the tube and the operating shaft is operated to move the moving member with the moving means, the guide is moved through the link. Since the plate is in an inclined position with the plate protruding forward, the direction of the cable tip can be easily changed along the inclined guide plate toward the narrow direction of the pipe, allowing the cable to be inserted smoothly into the pipe. . Further, since the guide plate is of a swing type, it can be accommodated within the cross section of the insertion guide tube, and the operation of inserting the insertion guide tube into the branch pipe can be easily performed.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a sectional view of the guide device as seen from the front, FIG. 2 is a sectional view of the main parts thereof as seen from the side, and FIG. 3 is the guide device. FIG. 4 is a side view of the tube, FIG. 4 is a diagram showing the implementation state of the pipe internal construction method, and FIGS. 5(x) to (c) are diagrams showing the cable insertion operation process. DESCRIPTION OF SYMBOLS 1... Conduit, 5... Cable insertion device, 6... Cable, 13... Insertion guide cylinder, 14... Operating axis,
15... Guide device, 18... Guide plate, 20...
- Moving bracket, 23... Link, 26... Nut body, 27... Screw shaft.

Claims (1)

[Claims] 1. In a cable insertion device that inserts an insertion guide tube into the tube from a branch tube provided in the tube, passes a cable through the insertion guide tube, and inserts the cable into the tube, the axis of the insertion guide tube is attached to the tip of the insertion guide tube. A guide plate is provided that can swing between a posture substantially along the central direction and an inclined posture protruding diagonally forward, and a movable member movable in the axial direction of the insertion guide cylinder is provided on the back side of this guide plate. A device for inserting a cable into a pipe, characterized in that the movable member and a guide plate are connected by a link, and a moving means is provided for moving the movable member by operating an operating shaft passed through an insertion guide tube.