JPH04101211U - Cable insertion device into pipe - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a device for inserting a cable into a pipe, which can easily change the direction of the tip of the cable smoothly in the axial direction of the pipe without much effort. [Configuration] Insertion guide tube 1 is attached to the tip of insertion guide tube 13.
A guide plate 16 is provided that can swing between a posture substantially along the axial direction x of the insertion guide tube 13 and an inclined posture protruding obliquely forward, and the guide plate 16 is provided with a guide plate 16 that is swingable between a posture substantially along the axial direction x of the insertion guide cylinder 13 and an inclined posture protruding diagonally forward.
A retractable member 18 is provided which is movable and protrudes from the tip of the insertion guide tube 13 along the axial direction x and can abut against the tube bottom 1a, and this retractable member 18 and the guide plate 16 are connected. A link member 20 is provided which pushes up the guide plate 16 into an inclined position by the movement of the retractable member 18 toward the insertion guide cylinder 13 when the retractable member 18 comes into contact with the tube bottom 1a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a device for inserting cables into pipes, and in particular, a system for viewing the inside of pipes using a TV camera. A branch pipe in which relatively rigid cables, such as cables used in construction methods, are attached to the pipe. Regarding a device for inserting a cable into a pipe, which is preferably used when inserting a cable into a pipe from It is something.

0002

[Conventional technology]

Traditionally, this method has been used to inspect the condition of a fluid such as water while flowing inside a pipe. Insert the cable with the TV camera attached to the tip from the branch pipe section for installing the fire hydrant into the pipe. There is a well-known intra-pipe inspection method in which the inside of the pipe is inspected using a TV camera. Ru.

0003 The cable insertion device used in this pipe internal construction method uses, for example, feed rollers to The cable is held between the cables and the cable is fed out by the rotational drive of this feed roller. Pass the cable from the branch pipe into the pipe and into the insertion guide cylinder inserted perpendicularly to this pipe. It is configured to be inserted into the tube from the tip of this insertion guide tube.

0004 In this case, when inserting a relatively rigid cable into the pipe, When the tip is fed into the tube from the tip of the insertion guide tube in the direction perpendicular to the tube, this Because it is difficult to change the direction of the cable end in the axial direction of the pipe, The end hit the tube wall and could not be inserted smoothly.

[0005] To deal with this, the direction of the cable tip can be adjusted at the tip of the insertion guide tube. A device for inserting a cable into a pipe that can be smoothly changed in the axial direction has already been proposed. It is.

[0006] As shown in FIG. 4, this cable insertion device includes an insertion guide cylinder having an opening 31. At the tip of the insertion guide cylinder 32, the position is approximately along the axial direction of the insertion guide cylinder 32 and diagonally forward. A guide plate 33 that can swing between a protruding and inclined position is provided, and the insertion guide tube 32 is The guide plate 33 can be temporarily moved by manually rotating the operating shaft 34 that is disposed through it. The tip of the cable 35 is guided by swinging it to the position shown by the phantom line. operation The rotation of the shaft 34 is achieved by a rotatably supported screw shaft 36 and a screw shaft 36 that is screwed into the screw shaft 36. The nut body 37 that moves up and down, the connecting shaft 38 attached to the nut body 37, and the movement The bracket 39 is connected to the rear surface of the movable bracket 39 and the guide plate 33. The vibration is transmitted to the guide plate 33 by the link 40, which causes the guide plate 33 to oscillate. It is designed to be moved. Note that the lower end of 41 is in contact with the guide plate 33 and the guide This is a second guide plate that swings along with the guide plate 33 from the solid line position to the imaginary line position.

[0007]

[Problem that the idea aims to solve]

However, in the conventional configuration described above, the operating position of the operating shaft 34 is the cable insertion device. Since it is located at the top, it has poor operability, and it is difficult to guide while rotating the operating shaft 34. Since the plate 33 and the like are to be swung, it may take time to oscillate the guide plate 33. .

[0008] This invention solves the above problem and allows you to easily connect cables to the cable end without any effort. Cable insertion device into a pipe that can smoothly change the direction of the end in the direction of the pipe axis The purpose is to provide the following.

[0009]

[Means to solve the problem]

In order to solve the above problem, the present invention has been developed to insert a guide into the pipe from a branch pipe installed in the pipe. Insert the guide tube, pass the cable through this insertion guide tube, and insert the cable into the tube. In the cable insertion device, the tip of the insertion guide tube has a A guide plate that can be swung between a posture that is almost in line with the curve and a tilted posture that protrudes diagonally forward. An insertion guide is provided on the back side of this guide plate that is movable in the axial direction of the insertion guide cylinder. a retractable member that protrudes from the tip of the inner tube along the axial direction and can abut against the tube bottom; is provided, and this retractable member and guide plate are connected, so that when the retractable member comes into contact with the bottom of the pipe, The guide plate is pushed up to an inclined position by the movement of the retractable member into the insertion guide cylinder side. A link member is provided.

0010

[Effect]

In the above configuration, when the retractable member is not in contact with the tube bottom, the biasing force of the spring Or, due to the weight of the retractable member or the guide plate, the retractable member may be at the tip of the insertion guide tube. The position is such that it protrudes from the insertion guide tube, and the guide plate is approximately along the axial direction of the insertion guide tube. position it so that it is in an upright position. In this state, the guide plate is inside the cross section of the insertion guide tube. It can be inserted into the tube without any problem. Insert the tip of the insertion guide tube into the tube. Then, the end of the retractable member contacts the bottom of the tube and moves in the direction of retraction into the insertion guide cylinder. The guide plate moves relatively and is pushed into an inclined position protruding forward via the link member. It can be raised. Therefore, we fed out the cable into the insertion guide cylinder and When the end reaches the guide plate, it moves along the inclined guide plate so that its direction is in the direction of the axis of the tube. , and the cable is smoothly inserted into the pipe. Also, I pulled out the cable When the insertion guide tube is later pulled out, the end of the retractable member will separate from the bottom of the tube, and the link part The guide plate returns to a position approximately along the axis of the insertion guide cylinder through the material, and the guide The plate is accommodated within the cross section of the insertion guide tube and can be removed from the tube without any problems.

[0011]

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. First, the pipe endoscopic construction method will be explained with reference to FIG. Here 1 is buried underground It is a conduit for water supply, etc., and there are pits for underground fire hydrants at appropriate distances above it. 2 is formed. A branch pipe 3 is led from the pipe line 1 into the pit 2, A fire hydrant (not shown) is attached to the upper end of this branch pipe 3 via a sub-valve 4. has been done. When implementing the pipe internal inspection method, close sub-valve 4 and remove the fire hydrant. Then, a cable insertion device 5 is connected to this sub-valve 4 as shown in the figure.

0012 The cable insertion device 5 is a cable wrapped around a cable 6 to be inserted into the conduit 1. a cable drum 7 and a second tube through which the cable 6 passes while maintaining the internal seal of the conduit 1. A split sealing device 8, a pressure hose 9 for passing the cable 6, and the cable 6 This case can be removed by rotating the rollers while holding the case between the rollers. a cable feeding device 10 configured to feed the cable 6 into the pipe; An emergency shutoff valve 11 interposed between the lower end of the cable feeding device 10 and the sub-valve 4; , an insertion outer cylinder 12 and an insertion guide cylinder 13 inserted into the insertion outer cylinder 12. It is said that it has a configuration with A guide device 14 is provided at the lower end of the insertion guide tube 13. and is configured to bend the cable 6 at right angles and send it out in the axial direction of the conduit 1. It is. TV cameras and their lights are connected to the cable 6 at appropriate intervals from its tip. , a plurality of large-diameter block-like bodies 6a such as a control device are attached.

[0013] Next, the configuration of the guide device 14 provided at the lower end of the insertion guide tube 13 is shown in FIG. I will explain further. At the lower end of the insertion guide tube 13, approximately half of its peripheral wall is cut out. An opening 15 which is wide open laterally is formed. The opening inside the insertion guide tube 13 The upper end of a guide plate 16 is attached to the center height position of the mouth 15 so as to be able to swing freely on a support shaft 17. I'm being kicked. Also, there is a bracket on the back side of the guide plate 16 inside the insertion guide tube 13. A rod-shaped retractable member 18 is supported by the rods 24a and 24b so as to be movable up and down. The member 18 is covered with a spring 19 and urged downward. The lower end of the retractable member 18 is It is connected to the central part of the back surface of the guide plate 16 via the link member 20, and is normally connected to the guide plate 1. 6 is in a vertically downward position along the axis x of the insertion guide tube 13, as shown in FIG. Retained.

[0014] Further, a second guide is provided above the guide plate 16 at the distal end of the insertion guide cylinder 13. The upper part of the side plate 21 is swingably attached to a support shaft 22. This support shaft 22 is equipped with a spring 23 that urges the second guide plate 21 in the direction a, and the second guide plate 2 The lower part of the guide plate 16 is in contact with the upper front surface of the guide plate 16 and is directed vertically downward like the guide plate 16. It is held in a straight position. The guide plate 16 and the second guide plate 21 are inserted respectively. It is formed to a size that fits within the cross section of the guide tube 13.

[0015] In such a configuration, when internally inspecting the inside of pipeline 1, use a fire hydrant (not shown). Connect the insertion outer cylinder 12 to the sub-valve 4 from which the Install the input device 5. Next, open the sub valve 4 and insert the insertion guide tube 1 inside the insertion outer tube 12. 3 and insert its tip into the pipe line 1 through the sub valve 4 and the branch pipe 3. . At this time, the guide plate 16 and the second guide plate 21 are connected to the insertion guide cylinder 13, respectively. Since it is contained within the cross-section of , it can be inserted without any problem.

[0016] When the insertion guide tube 13 is inserted to the vicinity of the bottom 1a of the conduit 1, the retractable member 18 is moved. The guide plate comes into contact with the bottom 1a of the conduit 1 and rises relative to the insertion guide tube 13. 16, the lower side is pushed forward via the link member 20. It assumes an inclined position with the lower end protruding forward. In addition, along with this, the second guide plate 2 1 also has its lower end in contact with the guide plate 16 and tilts forward, and the second guide plate 21 and The angle of inclination with the horizontal direction gradually becomes gentler from the top to the bottom by the guide plate 16. A curved guide surface is formed so that

[0017] In this state, the cable 6 is inserted through the outer tube 12 using the cable feeding device 10. Insert it into the insertion guide cylinder 13. The tip of the cable 6 is at the position of the guide device 14. When it comes with a curved guide surface as described above, the tip of the cable 6 is The end smoothly changes direction toward the axis of conduit 1 to ensure that cable 6 is fed into conduit 1. The inner surface of the conduit 1 is inspected using a TV camera etc. installed on the block-shaped body 6a. will be held.

[0018] When the inspection is completed, the cable feeding device 10 is operated in the opposite direction to remove the cable. 6 is raised. After that, insert the insertion guide cylinder 13 into the pipe line 1, the branch pipe 3 and the sub valve. Extract from 4. When this insertion guide tube 13 is pulled out from the conduit 1, the ejection/retraction member 18 is held in a downwardly protruding position by the biasing force of the spring 19, and the linked link The guide plate 16 returns to the vertically downward position via the lock member 20. Also, with this The second guide plate 21 also returns to the vertically downward position by the spring 23, and the guide plates 16 and and the second guide plate 21 are each accommodated within the cross section of the insertion guide tube 13 without any problem. being extracted.

[0019] Finally, close the sub-valve 4, take out the insertion cylinder 12, and attach the fire hydrant. The inspection work is completed. In the above embodiment, the spring 19 urges the retractable member 18 downward. However, the automatic movement of the retractable member 18 and the guide plate 16 without providing this spring 19 A configuration using only the weight may also be used.

[0020]

[Effect of the idea]

As described above, according to the present invention, the guide plate, the retractable member, and the link connecting these With a simple configuration that includes a member and a The guide plate is swung using the movement of the retracting member into contact with and separating from the bottom of the tube. This eliminates the need for the conventional work to swing the guide plate, and allows the insertion guide tube to be moved easily. Insertion and removal work can be easily done without taking much time. In addition, because the structure is simple, Manufacturing costs are also low.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a guide device of a cable insertion device into a pipe according to an embodiment of the present invention.

FIG. 2 is an overall schematic diagram of the cable insertion device.

FIG. 3 is a front sectional view illustrating the operation of the guide device.

FIG. 4 is a cross-sectional view of a conventional cable insertion device.

[Explanation of symbols]

1 Pipeline 5 Cable insertion device 6 Cable 13 Insertion guide tube 14 Guide device 16 Guide plate 18 Exit/exit parts 19 Spring 20 Link member 21 Second guide plate

Claims (1)

[Scope of utility model registration request] 1. 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, comprising:
A guide plate is provided at the tip of the insertion guide tube that can swing between a posture substantially along the axial direction of the insertion guide tube and an inclined posture protruding diagonally forward, and the insertion guide tube is attached to the back side of this guide plate. A retractable member is provided that is movable in the axial direction of the insertion guide tube and that protrudes from the tip of the insertion guide tube along the axial direction and can abut against the tube bottom, and connects the retractable member and the guide plate. A device for inserting a cable into a pipe, characterized in that a link member is provided that pushes up a guide plate into an inclined position by the movement of the retractable member toward the insertion guide cylinder when the retractable member contacts the bottom of the pipe.