JP2578890Y2 - Cable insertion device into pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inserting a cable into a pipe, and more particularly, to insert a relatively rigid cable, such as a cable in a pipe end view method using a TV camera, from a branch pipe provided in the pipe into the pipe. The present invention relates to an apparatus for inserting a cable into a pipe, which is suitably used in such a case.

[0002]

2. Description of the Related Art Conventionally, as a method of inspecting a state in which a fluid such as water flows in a pipe, a cable having a TV camera attached to a distal end thereof is inserted into a pipe through a branch pipe portion for attaching a fire hydrant. 2. Description of the Related Art An in-tube endoscope method for inspecting an inside of a tube with a TV camera is known.

[0003] In the cable insertion device in the pipe endoscope method, for example, a cable is sandwiched by a feed roller, and the cable is sent out by rotating the feed roller, and the cable is inserted into the pipe from the branch pipe in a direction perpendicular to the pipe. It is configured to pass through the inserted insertion guide tube and to be inserted into the tube from the tip of the insertion guide tube.

In this case, when inserting a relatively high-rigidity cable into a pipe, when the tip of the cable is fed into the pipe from the tip of an insertion guide tube perpendicular to the pipe, the direction of the tip of the cable is changed. Since it is difficult to change the direction of the tube in the axial direction, the end of the cable hits the tube wall and cannot be inserted smoothly.

To cope with this, there has already been proposed an apparatus for inserting a cable into a pipe in which the direction of the tip of the cable can be smoothly changed in the axial direction of the pipe at the tip of the insertion guide tube.

[0006] As shown in FIG. 4, the cable insertion device has an insertion guide tube 32 having an opening 31 at a tip end thereof substantially along the axial direction of the insertion guide tube 32 and an inclined position projecting obliquely forward. Guide plate 33 that can swing between
And manually rotating an operation shaft 34 disposed through the insertion guide cylinder 32 to swing the guide plate 33 to a position indicated by a virtual line to guide the distal end of the cable 35. The rotation of the operation shaft 34 includes a screw shaft 36 rotatably supported, a nut body 37 screwed up and down with the screw shaft 36, a connection shaft 38 and a moving bracket 39 attached to the nut body 37, Link 40 connected to the back of moving bracket 39 and guide plate 33
Thus, the guide plate 33 is oscillated. Reference numeral 41 denotes a second guide plate whose lower end is in contact with the guide plate 33 and swings with the guide plate 33 from a solid line position to a virtual line position.

[0007]

However, in the above-described conventional configuration, the operability is poor because the operating position of the operating shaft 34 is the uppermost portion of the cable insertion device, and the operating shaft 34 is not operated.
In order to swing the guide plate 33 etc. while rotating
The swing of the guide plate 33 may take a long time.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide an apparatus for inserting a cable into a pipe in which the direction of the cable tip can be easily changed in the axial direction of the pipe without any trouble. It is assumed that.

[0009]

In order to solve the above-mentioned problems, the present invention inserts an insertion guide tube into a tube from a branch tube provided in the tube, inserts a cable into the insertion guide tube, and inserts a cable into the tube. In the cable insertion device, a guide plate capable of swinging between a position substantially along the axial direction of the insertion guide tube and an inclined position protruding obliquely forward is provided at a distal end portion of the insertion guide tube, and a back surface of the guide plate is provided. A retractable member is provided on the side that is movable in the axial direction of the insertion guide cylinder and protrudes from the distal end of the insertion guide cylinder along the axial direction and can contact the tube bottom. A biasing means for biasing the guide tube so as to protrude from the distal end portion is provided, a rack portion is provided on the retractable member, the rack portion and the guide plate are interlocked and the retractable member abuts on the tube bottom. Said urging means when It is provided with a gear means for pushing up the guide plate to an inclined position by retreating operation of the insertion guide cylinder side of the advancing and retracting member of the anti-to.

[0010]

In the above construction, when the extension / retraction member is not in contact with the tube bottom, the extension / retraction member protrudes from the distal end of the insertion guide tube due to the extension / retraction member as biasing means or the weight of the guide plate. And the guide plate is positioned so as to be substantially in the axial direction of the insertion guide cylinder.
In this state, the guide plate is housed in the cross section of the insertion guide tube and can be inserted into the pipe without any trouble. When the distal end of the insertion guide cylinder is inserted into the pipe, the retraction member moves relatively in a direction in which the end thereof abuts against the bottom of the pipe and retreats into the insertion guide cylinder against the urging means. Is pushed up to the inclined posture protruding forward through the rack portion of the retractable member and the gear means. Then, when the cable is sent out into the insertion guide tube and the tip of this cable reaches the guide plate, its direction is changed to the axial direction of the tube along the inclined guide plate, and the cable is smoothly inserted into the tube. You. When the insertion guide tube is pulled out after the cable is pulled out, the end of the retracting member is separated from the bottom of the tube, and the guide plate is rotated by the urging means via the rack and the gear means. The guide plate returns to a position substantially along the center direction, and the guide plate is housed in the cross section of the insertion guide tube and is taken out of the tube without any trouble.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the in-pipe endoscopy method will be described with reference to FIG. Here, reference numeral 1 denotes a pipe for water or the like buried underground, and pits 2 for underground fire hydrants are formed at an appropriate distance above the pipe. A branch pipe 3 is led into the pit 2 from a pipeline 1, and an auxiliary valve 4 is provided at an upper end of the branch pipe 3.
It is configured to attach a fire hydrant (not shown) via the. When performing the in-pipe viewing method, the sub-valve 4 is closed, the fire hydrant is removed, and a 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 pipeline 1 is wound, and a split sealing device 8 for passing the cable 6 while maintaining the inside of the pipeline 1 in a sealed state. , A pressure-resistant hose 9 for passing the cable 6, and a cable delivery device 10 configured to feed the cable 6 into the pipe by rotating the roller while holding the cable 6 between the pair of rollers. An emergency shut-off valve 11 interposed between the lower end of the cable feeding device 10 and the auxiliary valve 4, an insertion outer cylinder 12, and an insertion guide cylinder 13 inserted into the insertion outer cylinder 12. The configuration is as follows. A guide device 14 is provided at a lower end portion of the insertion guide tube 13, and is configured to bend the cable 6 in a right-angle direction and feed the cable 6 in the axial direction of the pipeline 1. A plurality of large-diameter block-like bodies 6a such as a TV camera, its lighting, and a control device are attached to the cable 6 at appropriate intervals from the distal end thereof.

Next, the configuration of the guide device 14 provided at the lower end of the insertion guide tube 13 will be described with reference to FIG. At the lower end of the insertion guide tube 13, an opening 15 is formed, which is formed by cutting out substantially a half of the peripheral wall and opening largely to the side. An upper end of a guide plate 16 is swingably mounted on a support shaft 17 at the center of the opening 15 in the insertion guide cylinder 13 at a height level. The support shaft 17 is provided with a spring 18 for urging the guide plate 16 in the direction a.
A substantially semicircular gear portion 19 centered at 7 is mounted on the upper portion of the guide plate 16. A bar-shaped retracting member 21 is supported by brackets 20a and 20b on the rear side of the guide plate 16 in the insertion guide cylinder 13 so as to be able to move up and down, and the vertical distance is regulated by the large diameter portions 21a and 21b. A rack portion 21c is formed on an upper portion of the retractable member 21.
At an obliquely lower position of the support shaft 17, an interlocking gear 22 that meshes with the rack portion 21c of the extension member 21 and the gear portion 19 of the guide plate 16 is rotatably provided.
2, the extension member 21 and the guide plate 16 are linked to each other. As shown in FIG. 1, when the lower end portion of the extension member 18 protrudes greatly from the insertion guide tube 13 due to its own weight, the guide plate 16 is in a vertically downward posture along the axis x of the insertion guide tube 13. Is held in.

An upper portion of a second guide plate 23 is swingably mounted on a support shaft 24 at a position above the guide plate 16 at the distal end of the insertion guide tube 13. A spring 25 for urging the second guide plate 23 in the direction b is provided on the support shaft 24.
And a lower portion of the second guide plate 23 is in contact with an upper front surface of the guide plate 16 and is held in a vertically downward posture like the guide plate 16. Each of the guide plate 16 and the second guide plate 23 is formed to have a size that fits within the cross section of the insertion guide tube 13.

In such a configuration, when the inside of the pipe 1 is to be inspected internally, the insertion outer tube 12 is connected to the sub-valve 4 from which the fire hydrant (not shown) has been removed, and the cable is inserted as shown in FIG. The device 5 is installed. Next, the sub-valve 4 is opened, the insertion guide cylinder 13 in the insertion outer cylinder 12 is lowered, and the distal end portion is inserted into the pipe 1 through the sub-valve 4 and the branch pipe 3.
At this time, since the guide plate 16 and the second guide plate 23 are respectively housed in the cross section of the insertion guide tube 13,
Insertion is performed without any trouble.

When the insertion guide cylinder 13 is inserted to the vicinity of the bottom 1a of the pipeline 1, the retracting member 21 comes into contact with the bottom 1a of the pipeline 1 and rises relatively to the insertion guide cylinder 13, and the interlocking gear As shown in FIG. 3, the guide plate 16 swings in the direction c via the gear 22 and the gear portion 19, so that the lower side is pushed forward and the lower end thereof is inclined forward. Accordingly, the lower end of the second guide plate 23 also contacts the guide plate 16 and is inclined forward, and the inclination angle of the second guide plate 23 and the horizontal direction from the top to the bottom by the second guide plate 23 and the guide plate 16 is reduced. Guide surfaces are formed so as to be gradually gently bent.

In this state, the cable 6 is fed into the insertion guide tube 13 through the insertion outer tube 12 by the cable feeding device 10. When the distal end of the cable 6 reaches the position of the guide device 14, the guide surface bent as described above is formed, so that the distal end of the cable 6 smoothly turns in the axial direction of the conduit 1, and the cable 6 The pipe 1 is surely fed into the pipe 1 and the inner surface of the pipe 1 is inspected by a TV camera or the like provided on the block-shaped body 6a.

When the inspection is completed, the cable feeding device 10 is operated in the reverse direction, and the cable 6 is pulled up. After that, the insertion guide cylinder 13 is extracted from the pipeline 1, the branch pipe 3, and the sub-valve 4. This insertion guide tube 13 is connected to the conduit 1
When pulled out of the guide plate 1, the retracting member 21 returns to a posture of protruding downward by its own weight as shown in FIG. 1 and interlocks with the interlocking gear 22 and the gear portion 19.
6 returns to the vertical downward position. At the same time, the second guide plate 23 is also returned to the vertical downward position by the spring 25, and the guide plate 16 and the second guide plate 23 are respectively housed in the cross section of the insertion guide tube 13 and pulled out without any trouble.

Finally, if the sub-valve 4 is closed, the inserted outer cylinder 12 is taken out and a fire hydrant is attached, the inspection operation is completed.
In the above embodiment, the retracting member 21 is moved by its own weight.
Is projected downward, but may be biased by a spring or the like.

[0020]

As described above, according to the present invention, the guide plate, the retracting member, the urging means, the rack portion of the retracting member,
With a simple structure provided with gear means for interlockingly connecting the rack and the guide plate, the contact / separation operation of the retracting member with the bottom of the tube based on the insertion / removal operation of the insertion guide tube into / from the conduit is utilized. Since the guide plate is swung, the operation for swinging the guide plate, which has been conventionally performed, becomes unnecessary, and the operation of inserting and removing the insertion guide tube can be easily performed without taking much time. Further, since the structure is simple, the manufacturing cost is low.

[Brief description of the 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 view of the cable insertion device.

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 5 Cable insertion device 6 Cable 13 Insertion guide tube 14 Guide device 16 Guide plate 18, 25 Spring 19 Gear part 21 Retracting member 21c Rack part 22 Interlocking gear 23 Second guide plate

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshimi Sakurai 2-26-2 Ohama-cho, Amagasaki-shi, Hyogo Co., Ltd. Inside Kubota Mukogawa Works (72) Inventor Hirobo Ohama 2-26-26, Ohama-cho, Amagasaki-shi, Hyogo Stock (56) References JP-A-3-277896 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16L 55/00 H02G 1/08

Claims (1)

(57) [Scope of request for utility model registration] 1. A cable insertion device for inserting an insertion guide cylinder into a pipe from a branch pipe provided in the pipe, passing a cable through the insertion guide cylinder, and inserting the cable into the pipe.
A guide plate capable of swinging between a position substantially along the axial center direction of the insertion guide tube and an inclined position protruding obliquely forward is provided at the distal end of the insertion guide tube, and the insertion guide tube is provided on the back side of the guide plate. of movable and inserted guide tube in the axial direction from the tip portion to protrude along the axial direction provided it can abut projecting and retracting member to the tube bottom, the advancing and retracting member of the insertion guide tube
A biasing means for biasing to protrude from the tip is provided,
A rack portion is provided on the extending / retracting member, and the rack portion and the guide plate are interlockedly connected, and an insertion guide tube of the extending / retracting member against the urging means when the extending / retracting member abuts on the tube bottom. A device for inserting a cable into a pipe, comprising gear means for pushing up a guide plate to an inclined posture by a retreat operation to a side.