JP2862046B2 - 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 a method for inserting a cable having a large-diameter block-shaped body into the pipe, such as a cable in a pipe endoscope method using a TV camera. The present invention relates to a device for inserting a cable into a pipe, which is suitably used for a pipe.

[0002]

2. Description of the Related Art Conventionally, as a method of inspecting the state of a fluid such as water flowing in a pipe, a cable having a TV camera attached to a tip portion is inserted into the pipe from a fire hydrant portion, and the TV camera is used. 2. Description of the Related Art There is known a tube endoscope method for inspecting the inside of a tube.

[0003] The cable insertion device in the pipe endoscope method is configured so that the cable is sandwiched between a pair of feed rollers and the feed roller is rotationally driven to feed the cable into the pipe.

[0004]

However, in the conventional configuration as described above, when only one large-diameter block-shaped body such as a TV camera is provided at the end of the cable,
If this block-shaped body is positioned ahead of the feed roller in the feed direction, the cable can be sent without any trouble. However, in addition to the TV camera, a plurality of block-shaped bodies such as microphones that detect the state of the inside of the pipe with sound are used. If they are attached to the cable at appropriate intervals, there is a problem that they cannot be easily sent out.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus for inserting a cable into a pipe, which can easily send out a cable having a plurality of block-shaped members mounted on the way. And

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is an apparatus for inserting a cable having a large-diameter block-shaped body into a tube, and rotating the cable while holding the cable therebetween. A pair of feed rollers for feeding the cable by placing them at a plurality of positions with an interval longer than the length of the block-like body, means for rotating and driving the feed rollers, and means for moving each pair of feed rollers away from each other. Means for separating the pair of feed rollers from each other are arranged in parallel at a distance from each other, and a pair of first and second feed screws each having a screw portion and a shaft portion; Means for rotating the feed screw, first and second moving bearings supporting one end and the other end of the rotation shaft of one feed roller, and one end and the other end of the rotation shaft of the other feed roller Supporting third and fourth moving bearings, wherein the first moving bearing is screwed to a thread portion of a first feed screw, and the second moving bearing is fitted to a shaft portion of a second feed screw. Axially slidably supported, the third
Is screwed into the thread portion of the second feed screw,
The fourth moving bearing is supported by the shaft of the first feed screw so as to be slidable in the axial direction.

Further, according to the present invention, a feed screw penetrates through the inside of a case of a moving bearing, and the nut body is movable in the length direction of the feed screw and screwed to the feed screw in the case. A compression coil spring is provided between the case and the nut body so as to be fitted on the feed screw and is extendable in the length direction of the feed screw.

[0008]

According to this structure, the cable is sent out into the pipe by rotating the feed roller, and when the block-shaped member provided in the middle of the cable approaches a pair of feed rollers, the rollers are moved away from each other. To allow the block-shaped body to pass, and the cable is pinched and fed by another pair of feed rollers. When the block-like body passes between the pair of feed rollers, the cable is again pinched and fed by these rollers. In addition, when the block-shaped body approaches another pair of feed rollers, the feed roller is similarly moved away from the block-shaped body, so that the cable provided with the block-shaped body is easily inserted into the pipe. Is done. At this time, since each feed roller was moved in the opposite direction by the feed screw,
When the feed rollers are moved away from each other or when the cable is held again, the feed rollers are quickly operated.
In addition, only by a pair of first and second feed screws for keeping the pair of feed rollers apart from each other,
Since it is possible to support not only a moving bearing for giving a feed but also a moving bearing that only supports a feed roller, a simple configuration having only a pair of feed screws enables a pair of movable feeds. Both ends of the roller are reliably supported.

When clamping the cable with the feed roller,
The nut body in the case of the moving bearing supporting the rotation shaft of the feed roller is moved by the feed screw, and the nut body and the compression coil spring fitted to the feed screw between the case and the nut body are interposed. Then, the case of the moving bearing is moved, whereby the pair of feed rollers are brought closer to each other. At this time, even if the feed screw, that is, the nut body is excessively fed, this is absorbed by the contraction of the compression coil spring, thereby preventing a situation where the cable is crushed and crushed. Also, since the compression coil spring is housed in the case in a state fitted to the feed screw,
The structure is smaller than when this is provided outside.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. Here, reference numeral 1 denotes a conduit for water or the like buried underground, and a pit 2 for an underground fire hydrant is provided at an appropriate distance above the conduit. 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 inserted into the pipeline 1 is wound,
In the vicinity of the cable drum 7, a split sealing device 8 for passing the cable 6 while keeping the inside and outside of the pipe 1 sealed, a pressure-resistant hose 9 for passing the cable 6, and the pressure-resistant hose 9 connected to the pressure-resistant hose 9. , A cable delivery device 10 for delivering the cable 6 into the pipe, an emergency cutoff valve 11 connected to the lower end of the cable delivery device 10, and an insertion interposed between the emergency cutoff valve 11 and the auxiliary valve 4. Outer cylinder 12
And an insertion inner cylinder 13 arranged inside the insertion outer cylinder 12.

An insertion rod 14 is attached to the insertion inner cylinder 13 so as to penetrate the cable feeder 10 and protrude upward. After the sub-valve 4 is opened, the insertion rod 13 in the insertion outer cylinder 12 is inserted.
Is inserted into the pipeline 1 through the sub-valve 4 and the branch pipe 3. Further, a guide means 15 operable with an insertion rod 14 is provided at a lower end of the insertion inner cylinder 13,
It is configured to bend the cable 6 at right angles and feed it into the pipeline 1. A plurality of large-diameter block-like bodies 16 such as a TV camera, its lighting, and a control device are attached to the cable 6 at appropriate intervals from the end thereof.

As shown in FIG. 4, the cable feeding device 10 has a cylindrical box 21 which is sealed from the outside. As shown in FIGS. 1 and 2, a frame 22 is provided inside the box 21, and a pair of horizontal feed screws 23 and 24 are horizontally spaced from each other in the frame 22. And are arranged in parallel.

A rotary shaft 25 is supported on a portion of the frame 22 at an intermediate position between the feed screws 23 and 24. The tip of the rotating shaft 25 penetrates the box 21 in a watertight state and reaches the outside, and a handle 26 is attached to that portion. The gear 27 attached to the rotating shaft 25 meshes with the gears 28 and 29 having the same number of teeth attached to the two feed screws 23 and 24, respectively. Therefore, by rotating the handle 26, the two feed screws 23 and 24 rotate in the same direction.

A pair of moving bearings 30, 31 are provided by a feed screw 23.
Is supported. The feed screw 23 has a screw portion 32 and a shaft portion 33, and the moving bearing 30 is screwed to the screw portion 32 and is moved in the axial direction of the feed screw 23 based on the rotation of the feed screw 23. Specifically, the moving bearing 30 has a case 34, and the feed screw 23 passes through the inside of the case 34. This case 34
A nut body 35 screwed to the feed screw 23 is accommodated inside the nut.
Is slidable in the length direction of the feed screw. Between the end surface of the nut body 35 inside the sleeve 36 and the inner surface of the end of the case 34, a compression coil spring 42 that can be extended and contracted in the length direction of the feed screw 23 was fitted onto the feed screw 23. It is arranged in a state. The moving bearing 31 has a cylindrical slider 37 supported by a shaft 33 and a feed screw 31.
It is slidable in 17 axial directions.

The feed screw 24 has a shaft portion 38 and a screw portion 39 at positions corresponding to the screw portion 32 and the shaft portion 33 of the feed screw 23, respectively. And the shaft part 38 has a moving bearing
A moving bearing 40 corresponding to 30 is slidably supported in the axial direction of the feed screw 24. A moving bearing 41 corresponding to the moving bearing 31 is screwed into the screw portion 39, and the feed screw 24 is rotated based on the rotation of the feed screw 24.
In the axial direction. Although illustration of the detailed structure is omitted,
The moving bearing 40 has the same configuration as the moving bearing 31, and the moving bearing 41 has the same configuration as the moving bearing 31.

A rotating shaft 43 extends between the moving bearings 30 and 40 and is rotatably supported. A rotating shaft 44 extends between the moving bearings 31 and 41 and is rotatably supported. .
In FIG. 1, only the moving bearings 40 and 41 have the rotating shaft 4.
Although the bearing structures 3 and 44 are illustrated, the bearings 30 and 31 have the same bearing structure. Feed rollers 45 and 46 are attached to the rotating shafts 43 and 44, respectively.
46 is shaped like a drum and has a rubber lining on its surface.

For this reason, the moving bearing 30 is formed by the feed screw 23.
Is moved, the feed roller 45 and the moving bearing 40 are moved together, and when the moving screw 41 is moved by the feed screw 24, the feed roller 46 and the moving bearing 31 are moved together. Is done.

The screw portion 32 of the feed screw 23 and the screw portion 39 of the feed screw 24 are configured to have a reverse screw relationship with each other. Therefore, by operating the handle 26,
When the rollers 3 and 24 are rotated in the same direction, the feed rollers 45 and 46 move quickly so as to approach or separate from each other, and the interval changes. When approaching, the cable 6 is pinched between these hourglass-shaped feed rollers 45 and 46.

Immediately below the portion shown in FIG. 1, another pair of feed rollers 45 and 46 which are moved similarly by the same configuration as that of FIG. 1 are provided. The schematic arrangement is shown in FIG. As shown in FIG. 2, a gear 27 directly connected to the handle 26, a gear 28 attached to the feed screws 23 and 24,
29 is arranged at a different position in the height direction. The gear 27 also meshes with gears 28, 29 similarly mounted on the feed screws 23, 24 for the lower feed rollers 45, 46. Therefore, by operating one handle 26, all of these four feed rollers 45 and 46 can be simultaneously moved.

Another handle 48 is provided outside the box 21, and a rotating shaft 49 of the handle 48 penetrates the box 21 in a watertight state and is rotatably supported inside.
The rotating shaft 49 is connected to the rotating shaft 44 of one feed roller 46 via a universal joint 50. A universal joint 51 is connected to the rotating shaft 43 of the other feed roller 45,
The universal joint 51 is linked to the rotating shaft 49 by a pair of gears 52 and 53 having the same number of teeth. For this reason, the feed roller 45,
46 can rotate in opposite directions at the same rotation speed. In FIG. 1, reference numeral 54 denotes a viewing window,
It is possible to observe inside.

As shown in FIG. 3, the above-mentioned four feed rollers 45, 46 constitute an upper feed device 55. Then, a lower position, which is longer than the length of the block-shaped body 16 of the cable 6, is located inside the same box 21 from the upper feeder 55 in the same configuration as the upper feeder 55. A feeding device 56 is provided. As shown in FIG. 4, a handle 26 for adjusting the interval between the feed rollers 45, 46 is provided on upper and lower feed devices 55, 56, respectively. Therefore, these upper and lower feeders 55 and 56
The distance between the feed rollers 45 and 46 can be adjusted independently of each other.

On the other hand, only one handle 48 for rotating the feed rollers 45 and 46 is provided as shown in FIG. The rotating shafts 49 of the upper and lower feeders 55 and 56 are linked to each other by a sprocket 57 and a chain 58. Therefore, by operating the handle 48, all the feed rollers 45 and 46 rotate at the same rotation speed.

In such a configuration, when performing an endoscopic inspection of the pipeline 1, first, as shown in FIG. 4, the fire hydrant is removed, and a cable insertion device 5 is installed instead. Then, the cable 6 is paid out from the cable drum 7 and inserted into the pressure-resistant hose 9. Also handle 26
To move the feed rollers 45 and 46 toward each other so that the feed rollers 45 and 46 can clamp the cable 6 with a predetermined force by the action of the springs 42 of the moving bearings 30 and 41. And keep it. Further, the insertion inner cylinder 13 is made to protrude from the insertion outer cylinder 12 into the pipeline 1 so that the guide means is provided.
15 is kept in operation.

Next, by operating the handle 48, the feed roller 45,
By rotating 46, the cable 6 is sent out as shown in FIG. At this time, the upper feed device 55 and the lower feed device
56 has a pair of upper and lower feed rollers 45 and 46, respectively, and the cable 6 is sandwiched by the four feed rollers 45 and 46, respectively, so that the flexible cable 6 is sent out in a stable state.

Next, when it is confirmed through the viewing window 54 that the block 16 has approached the upper feed device 55, the handle 26 of the upper feed device 55 is operated to move the feed rollers 45, 46 away from each other. Then, as shown in FIG. 3B, the block-like body 16 can pass through the upper feed device 55. By operating the handle 48 in this state, the cable 6 is sent out by the lower feeder 56.

When the block 16 has passed the upper feed device 55, the handle 26 is operated in the reverse direction to bring the feed rollers 45, 46 closer to each other. At this time, in the moving bearings 30 and 41, the nut body 35 presses the case 34 via the spring 42 to move the case. At this time, even if excessive feed occurs in the feed screws 23 and 24, this is absorbed by the spring 42, and the occurrence of a situation where the cable 6 is crushed and crushed is prevented.

Then, by operating the handle 26 of the lower feeder 56, the feed rollers 45, 46 are moved in a direction away from each other, and as shown in FIG. Allow to pass 56. By operating the handle 48 in that state, the upper feed device is
At 55, the cable 6 is sent out.

When the block 16 has passed the lower feeder 56, the feed rollers 45 and 46 are brought closer to each other as in the case of the upper feeder 55, and again as shown in FIG. The cable 6 is held between the upper and lower feeders 55 and 56. By operating the handle 48 in this state, the cable 6 is further sent out. Thus, when the block-shaped body 16 such as a TV camera or a microphone passes, the feed rollers 45 and 46 of the feed device 55 or 56 are opened, and the cable 6 can be sent out by the other feed device 56 or 55.

[0030]

As described above, according to the present invention, the cable can be sent out into the pipe by rotating the feed roller, and when the cable passes through the block-shaped body provided in the middle of the cable, the cable is sequentially fed. By moving the rollers away from each other, the block-shaped body can be passed, and not only the cable provided with the block-shaped body can be easily inserted into the pipe, but also each feed roller is opposed to each other by the feed screw. In order to move these feed rollers away from each other or to pinch the cable again, the feed rollers can be quickly moved to work efficiently, and the pair of feed rollers can be moved efficiently. Feed is provided only by a pair of first and second lead screws for keeping the members away from each other. Of the pair of movable feed rollers can be supported by a simple configuration with only a pair of feed screws. It can be reliably supported.

Since the nut body and the compression coil spring for the feed operation are accommodated in the moving bearing moved by the feed screw, even if the feed screw is excessively fed, it can be absorbed by the compression coil spring. In addition, the cable can be prevented from being crushed and crushed, and the compression coil spring is housed inside the case with the feed screw fitted to the outside, so the structure is smaller than when it is provided outside. It can be made.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a gear train in the cable feeding device.

FIG. 3 is an operation explanatory view of the cable feeding device.

FIG. 4 is a diagram showing an overall configuration of a cable insertion device into a pipe according to one embodiment of the present invention.

[Explanation of symbols]

 1 Pipeline 6 Cable 16 Block-shaped body 23 Feed screw 24 Feed screw 26 Handle 30 Moving bearing 31 Moving bearing 34 Case 35 Nut body 40 Moving bearing 41 Moving bearing 42 Compression coil spring 45 Feed roller 46 Feed roller 48 Handle 55 Upper feed device 56 Lower feeder

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shizuo Inoue 2-26-26 Ohama-cho, Amagasaki-shi, Hyogo Co., Ltd. Inside Kubota Mukogawa Works (72) Inventor Yoshimi Sakurai 2-26-26, Ohama-cho, Amagasaki-shi, Hyogo Co., Ltd. Inside the Kubota Mukogawa Works (72) Inventor Hiroyasu Ohama 2-26-Ohama-cho, Amagasaki-shi, Hyogo Pref. (72) Inventor Toshio Toshima 2-26 Ohama-cho, Amagasaki City, Hyogo Prefecture Inside Kubota Mukogawa Works Co., Ltd. (56) References JP-A-3-277895 (JP, A) (58) Fields investigated (Int. . ^6, DB name) F16L 55/00 - 55/24

Claims (2)

(57) [Claims] 1. A device for inserting a cable in a tube with a large diameter block-shaped body in the middle, double sending a cable by rotating while holding the cable
The feed rollers of the several pairs, at a longer distance than the length of the block-shaped body arranged in a plurality of positions, and means for rotating said feed roller, and means to distance the pair of the feed rollers to each other to each other is provided, the pair Feed rollers between each other
Means for spacing away are arranged in parallel at a distance from each other
And a pair of first members each having a screw portion and a shaft portion.
And second lead screw and means for rotating both lead screws
And one end and the other end of the rotating shaft of one feed roller
The first and second moving bearings and the other feed roller
Third and fourth movements supporting one end and the other end of the rotating shaft
A dynamic bearing, wherein the first movable bearing has a first feed screw.
And the second moving bearing is screwed into the second threaded portion.
It is slidably supported in the axial direction by the shaft of the feed screw.
The third moving bearing is screwed into the thread of the second feed screw.
And the fourth moving bearing is provided on the shaft of the first feed screw.
An apparatus for inserting a cable into a pipe, the apparatus being slidably supported in a direction . 2. A feed screw penetrates through the inside of a case of a moving bearing, and a nut body that is movable in the length direction of the feed screw and is screwed to the feed screw in the case. Oite the feed between the nut member
2. The apparatus for inserting a cable into a pipe according to claim 1, further comprising a compression coil spring which is disposed in a state of being fitted over the screw and is extendable in the length direction of the feed screw.