JP4381746B2 - In-pipe working device - Google Patents

Description

  The present invention relates to an in-pipe work device, and more particularly, in a method of laying a communication cable in a pipe line such as underground pipe, for arranging a communication cable and a guide pipe for accommodating and protecting the communication cable in an upper part of the pipe line. The present invention relates to a working device for changing the installation position of a support tool used in the above and for correcting the posture.

  In recent years, communication cables such as optical fibers have been arranged in underground pipes such as sewer pipes and gas pipes. This is because the IT strategy is sung as a national project, and an underground buried communication cable laying method is attracting attention as one medium of a high-speed / ultra-high-speed network which is an information transmission means. The communication cable laying in the underground burial method has characteristics that it protects the spatial environment (aesthetics of the ground landscape, etc.) and is resistant to disasters such as earthquakes and typhoons, compared to the laying method. Especially for sewer pipes, the branch pipes connected to the branch pipes have already been led to each home, and the upper part of the pipes is an empty space, and the FTTH (Fiber To The Home) plan for drawing communication cables into each home Is attracting attention as an important infrastructure.

When installing a communication cable such as an optical fiber cable in an existing pipeline such as a sewer, as a fixture to fix the communication cable to the upper part of the inner wall of the pipeline, hold the communication cable almost on the upper half of the inner wall of the pipeline Thus, a spring plate-like fixture (sag prevention member) that is pressed against and fixed to the inner wall surface is used. That is, a substantially semi-annular spring plate inner wall fastening portion that is slightly longer than the upper half circumference of the pipe is provided, and the inner wall fastening portion has a gap between both ends larger than the inner diameter of the pipe and an inner wall fastening portion. A support recess for bending and supporting the communication cable across the width direction is formed on the outer peripheral surface of the central portion of the tube by bending the spring plate, and the inner wall surface of the pipe line by the restoring force of the spring plate Press and fix to. Some of them are provided with a support pipe for inserting and holding a communication cable instead of the support recess. As such examples, those disclosed in Patent Document 1 and Patent Document 2 below are known.
JP 11-315580 A JP 2002-171627 A

After laying the communication cable on the upper part of the pipe using the above-mentioned slack prevention member, etc., the slack prevention member can be rotated and removed in the circumferential direction of the pipe to perform maintenance inside the pipe. Rarely. However, the slack prevention member, because substantially circular pillar shaped spring plate is in close contact with the pipe inner surface by elastic restoring force, is easy to move by floating the inner wall surface fastener part from the conduit inner surface is not.

  In view of such circumstances, an object of the present invention is to provide an in-pipe working apparatus that can easily correct the position and move a slack prevention member or the like already mounted in the pipe without damaging the inner surface of the pipe. There is in point to do.

Means and effects for solving the problems

An in-pipe work apparatus according to the present invention is an in-pipe work apparatus that moves a substantially semi-annular spring plate cable support fixed to an inner wall surface of a pipe line in the pipe line, and is reduced in diameter relative to the diameter of the pipe line. A pair of left and right tip insertion members that are inserted between both end portions of the spring plate cable support and the inner wall surface, and the insertion members are attached to each other, A head mechanism provided with a pair of left and right laterally extending and contracting drive means for forcibly moving a pair of insertion members in the diameter-reducing direction, and a concave bracket is attached to the tip, and the concave bracket is moved in the vertical direction, and vertical bracket telescopic drive means supported on the head mechanism to move the head mechanism and the rotating mechanism for rotating in the circumferential direction, in the axial direction of the tube in the conduit while supporting the rotation mechanism A moving means fit, and outriggers which can come into contact with the inner wall surface, is fixed to the moving means, the distal end the outrigger is mounted on a telescopic driving means vertically moving the outrigger in the vertical direction, the longitudinal The outrigger is moved in the up-and-down direction by the extending / contracting drive means, and is provided with a fixing mechanism capable of relatively fixing and releasing the moving means relative to the pipeline . The concave bracket is movable up and down by the bracket extension / contraction drive means so as to be able to engage and disengage from the cable support portion protruding in the inner diameter direction of the spring plate cable support .
According to the above configuration, the position of the communication cable support such as the slack preventing member held in pressure contact in the pipe line in the pipe longitudinal direction and the pipe circumferential direction can be changed without damaging the inner surface of the pipe line. It becomes possible to correct, correct, and improve the maintainability of the communication cable by the underground burying method.

The in-pipe work device according to the present invention is disposed between the rotation mechanism and the head mechanism, and moves the head mechanism along the pipe axis direction so that the pair of fitting members are connected to the inner wall surface. An insertion mechanism that can be inserted between the spring plate cable support and the spring plate cable support is provided.
According to the above configuration, since the insertion mechanism for inserting the insertion member between the inner surface of the conduit and the communication cable support is provided, the insertion member is inserted between the inner surface of the conduit and the communication cable support. The work can be mechanized and provided as an even more convenient one. In addition, since an insertion mechanism is interposed between the head mechanism and the rotation mechanism, a larger output is required than when a rotation mechanism is interposed between the head mechanism and the insertion mechanism. In the insertion of the insertion member, the mass of the lower side portion can be reduced in the insertion direction, the insertion member can be inserted efficiently, and the output of the insertion mechanism can be somewhat reduced.

(First embodiment)
1 to 4 show an in-pipe working apparatus A in a first embodiment of the in-pipe working apparatus according to the present invention. 1 is a side view of a sewer pipe that is an underground pipe in a state where it is arranged in a branch pipe 1, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is an overall perspective view obliquely from above. Each shows. The in-pipe work apparatus A is defined as the front in FIG. 1 on the right side (side where a later-described head mechanism 4 is equipped) and the left side (side where a later-described fixing mechanism 7 is equipped) as rear.

  This in-pipe working device A includes a pair of right and left that can be inserted between an inner surface 1a of a branch pipe (an example of a pipe line) 1 and a slack prevention member (an example of a communication cable support) S that is press-fitted and locked thereto. The fitting insertion members 2 and the fitting insertion members 2 are forcibly moved in the direction of diameter reduction with respect to the diameter of the branch pipe 1, and the slack prevention member S (see FIGS. The head mechanism 4 that can be peeled from the head, the turning mechanism 5 that can turn the head mechanism 4 in the circumferential direction of the branch pipe 1, and the rotary mechanism 5 that supports the turning mechanism 5 and moves and travels in the branch pipe 1. A traveling member (an example of a moving unit) 6 for this purpose and a fixing mechanism 7 that can relatively fix and release the traveling member 6 to and from the branch pipe 1 are provided.

  As shown in FIGS. 1 to 3, the traveling member 6 is formed by bending a pipe into a substantially hexagonal shape in a plan view. A main body frame 10 is formed by a vertical mounting base 9 erected from the plate 8. In other words, the bottom member of the main body frame 10 is the traveling member 6, and the left and right straight portions 6 a are in line contact with the inner surface 1 a of the branch pipe 1 (see FIG. 3), and are slidable within the branch pipe 1. It has become.

  Further, hook portions 6b that can be freely hooked with the wires 11 and 12 for traveling are fixed to the front and rear ends of the traveling member 6, respectively. That is, if the first wire 11 provided on the head mechanism 4 side is pulled, the in-pipe work device A slides and travels forward, and if the second wire 12 is pulled, the in-pipe work device A slides. Drive and go backwards. Reference numeral 22 denotes six air hoses for supplying and discharging air to four air cylinders 15, 18 and 19 to be described later.

  The rotation mechanism 5 is composed of a geared motor mounted on and fixed to the mounting base 9, the head mechanism 4 is fixed to the output shaft 5 a, and the case 5 b is fixed to the mounting base 9 on the lower side and on the upper side. The mounting plate 13 is fixed, and a fixing mechanism 7 is installed over the mounting plate 13 and the traveling member 6. By controlling energization to the pair of lead wires 14, the head mechanism 4 can be rotated forward (see arrow A in FIG. 3) and rotated backward (see arrow B in FIG. 3) around the output shaft 5a.

  As described above, the fixing mechanism 7 includes the vertical first air cylinder 15 installed and supported on the traveling member 6 and the mounting plate 13, and the outrigger 16 fixed to the piston rod 15a. The outrigger 16 is configured as a mushroom-like member having a spherical portion with a curvature smaller than the inner diameter of the branch pipe 1 so as not to be caught when inserted into the branch pipe 1. The outrigger 16 is moved upward by the extension drive of the first air cylinder 15 and is brought into strong contact with the upper part of the inner surface of the branch pipe 1, so that the main body frame 10, that is, the in-pipe working device A is moved with respect to the branch pipe 1. Can be fixed. And if the 1st air cylinder 15 is shortened and the outrigger 16 moves downward, fixation to the branch pipe 1 can be cancelled | released.

  The head mechanism 4 is configured by attaching a pair of left and right second air cylinders 18 and a third air cylinder 19 facing up and down to a head plate 17 attached to the output shaft 5 a of the geared motor 5. The front end portion of the piston rod 18a of each second air cylinder 18 is attached with a fitting member 2 in a forward-facing posture via a bracket 20, and at the front end portion of the piston rod 19a of the third air cylinder 19, A U-shaped bracket 21 is provided. The insertion member 2 is formed of a round bar steel material having a shape that is sharply cut so that the tip is sharp, and the cut surface 2 a faces the tube center of the branch pipe 1 so that it can be reliably inserted into the loosening prevention member S. Equipped with posture.

  Next, an operation example in which the orientation of the slack preventing member S attached to the branch pipe 1 is changed and set in the circumferential direction of the branch pipe 1 using the in-pipe work apparatus A will be described.

  Here, for example, as shown in FIG. 11, the slack preventing member S includes an inner wall surface fixing portion 51 made of a spring plate having a circumferential length of a semicircle or more on the inner peripheral surface of the branch pipe 1, and its It is comprised with the cable support pipe 52 provided in the internal diameter side surface of the center part of the longitudinal direction. Small spike-like projections 53 for increasing the pressure contact force with the inner surface 1a are formed on the outer peripheral surfaces of both end portions of the inner wall surface fixing portion 51, and the inner wall surface fixing portion 51 and the inner surface 1a of this portion are formed. There is a slight gap between them. C is a communication cable.

  First, as shown in FIGS. 5A and 5B, by pulling the wires 11 and 12 (see FIG. 1), the in-pipe working device A is pulled into the branch pipe 1 while watching a TV camera (not shown). Then, it is moved to a position in the vicinity of the slack preventing member S to be corrected. At this time, the piston rods 15a, 18a, and 19a of the air cylinders 15, 18, and 19 are shortened so that the pull-in operation is easy. When the target point is reached, the geared motor 5 is driven to rotate the head mechanism 4 so that the bracket 21 is aligned with the support pipe 52 of the slack preventing member S.

  Next, the right and left second air cylinders 18 are extended and driven, and the first wire 11 is pulled while the insertion member 2 is projected and moved to the position just before contact with the inner surface 1 a of the branch pipe 1. As shown in FIGS. 6A and 6B, the pair of left and right fitting members 2 are inserted into a slight gap between the inner wall surface fixing portion 51 and the inner surface 1a.

  When the fitting member 2 is inserted, as shown in FIGS. 7A and 7B, the first air cylinder 15 is driven to extend so that the outrigger 16 is brought into pressure contact with the inner surface 1a, so that the main body frame 10, that is, in-pipe work. The apparatus A is fixed to the branch pipe 1, and then the third air cylinder 19 is driven to extend so that the left and right upper ends of the bracket 21 are secured to the inner wall surface while the support pipe 52 is accommodated inside the bracket 21. The contact part 51 is lightly touched or moved to a position just before touching.

  Then, the left and right second air cylinders 18 are driven to be shortened, the inner wall surface fixing portion 51 is slightly reduced in diameter, and the spike-like protrusion 53 is floated from the inner surface 1a. As a result, the slack preventing member S can be gripped at three locations of the pair of insertion members 2 and the bracket 21. Accordingly, as shown in FIGS. 7A and 7B, the geared motor 5 is driven to rotate forward or reversely in the gripped state, and the slack preventing member S is rotated to a desired angular position, so that the installation angle is adjusted. Make corrections.

  Next, the second air cylinder 18 is driven to extend by a predetermined amount to release the reduced diameter of the inner wall surface fixing portion 51, and the third air cylinder 19 is further driven to shorten so that the slack preventing member S is again connected to the branch pipe 1. The inner surface 1a is pressed and held. Thereafter, the first air cylinder 15 is shortened and the outrigger 16 is lowered, the fixing of the in-pipe working device A to the branch pipe 1 is released, and the first wire 11 or the second wire 12 is pulled to perform the next operation. It is moved to a place.

(Second Embodiment)
8 to 10 show a second embodiment of the in-pipe working apparatus A according to the present invention. The in-pipe work apparatus A in the present embodiment is different from the in-pipe work apparatus A in the first embodiment described above in that the pair of fitting members 2 are driven and moved in the longitudinal direction of the branch pipe 1 with respect to the traveling member 6. A flexible insertion mechanism 23 is added. Structural differences include the absence of the bracket 21 for the support pipe 52 and its air cylinder 19 and the use of two first air cylinders 15 for raising and lowering the outrigger 16.

  The main body frame 10 is configured so that the traveling member 6 has a pair of front and rear connecting pipes 6c that are somewhat long, and a first air cylinder 15 is attached to each of the left and right straight portions 6a. The outrigger 16 is formed in a mushroom-like shape having a long left and right length so as to be mounted across the 15a. The left and right first air cylinders 15 are used as support members, and the geared motor 5 in the front-rear orientation is supported and fixed therebetween.

  A fourth air cylinder is attached to a large-diameter output shaft (an example of a portion to be rotated) 5a of the geared motor 5 in a front-rear orientation, and the head mechanism 4 is mounted on the piston rod 23a. The head mechanism 4 in this case is composed of a pair of left and right second air cylinders 18 and a head plate 17 that supports them and is attached to a piston rod 23 (an example of an inserted side portion) a. The point that each of the second air cylinders 18 is equipped with the fitting member 2 is the same as that of the first embodiment.

  The procedure for correcting the position of the slack preventing member S by the in-pipe work apparatus A of the second embodiment is basically the same as that by the in-pipe work apparatus A of the first embodiment, and only the main points including the differences are included. To state. First, when the position near the slack preventing member S is reached, the geared motor 5 is driven as necessary to rotate the fourth air cylinder 23, that is, the head mechanism 4, and the second air cylinder 18 is extended. Thus, the distal ends of the left and right fitting members 2 are aligned between both end portions of the inner wall surface fixing portion 51 and the inner surface 1a.

  Next, the two first cylinders 15 are extended and driven, and the outrigger 16 is raised to relatively fix the in-pipe working device A to the branch pipe 1. Once fixed, the second air cylinder 23 is driven to extend, and the pair of fitting members 2 are forcibly inserted between the inner wall surface fastening part 51 and the inner surface 1a, and then the left and right second air cylinders 18 are slightly moved. The inner wall fastening portion 51 is reduced in diameter by being shortened, and the tip of the inner wall fastening portion 51 is lifted from the inner surface 1a and held by two-point support by the left and right fitting members 2. Subsequent position correction and adjustment of the slack preventing member S are the same as those in the first embodiment.

  The slack preventing member S has a structure in which a concave portion is formed in which the upper portion of the inner wall surface fixing portion 51 is recessed toward the inner diameter side in place of the support pipe 52 (see FIGS. 1 and 4 of JP-A-11-315580). If the fourth air cylinder 23 is a large output type, the fourth cylinder 23 is driven to extend while the slack preventing member S is gripped by the pair of insertion members 2, thereby preventing the slack preventing member. It is possible to detach S from the inner surface 1 a of the branch pipe 1 by tilting S in the pipe axis direction (pipe longitudinal direction) of the branch pipe 1.

  Further, the in-pipe working device A of the second embodiment may be one to which a bracket and its air cylinder are attached, as in the first embodiment.

  In addition, although the in-pipe working apparatus A according to the present invention has been described based on a preferred embodiment, the present invention can be modified within a range not exceeding the gist thereof. For example, the traveling member 6 may have a rollable wheel or a structure having a drive wheel and a self-propelled structure. The air cylinder and geared motor can be replaced with various drive sources such as a hydraulic cylinder, an electric cylinder, or an electric cylinder. An in-tube camera may be provided on the traveling member 6.

  According to the in-pipe work apparatus A according to the first embodiment, the following effects (1) and (2) are obtained. According to the in-pipe work apparatus A according to the second embodiment, the following effects (1) and (3) are obtained. , (4) is advantageous. (1) Since the inner wall surface fixing portion 51 of the slack preventing member S can be easily reduced in diameter by driving the second air cylinder 18, the circumferential direction of the slack preventing member S installed in the branch pipe 1 The angle can be easily corrected. (2) Since the lengthwise dimension (full length) of the in-pipe working device A is gathered in a compact manner, it can be easily inserted into a branch pipe having a bent portion in the middle.

  (3) Even after the working device is fixed to the inner surface of the pipe line by the outrigger 16, the fitting member 2 can be taken in and out in the pipe length direction of the pipe line, so that the position of the fitting member 2 can be easily finely adjusted. (4) Since the slack preventing member S can be pushed in the tube axis direction by the fourth air cylinder 23 in a state where the inner wall fastening portion 51 is gripped by the fitting member 2, the slack preventing member is tilted in the tube axis direction. It is also possible to remove it from the pipe inner surface.

Side view of the in-pipe work apparatus according to the first embodiment. FIG. 1 is a plan view of the in-pipe working apparatus of FIG. Front view of the in-pipe work device of FIG. 1 is a perspective view of the in-pipe working device of FIG. (A) Side view, (b) Front view of the in-pipe working device approaching the slack prevention member (A) side view of the state in which the wedge member is inserted into the loosening prevention member, (b) front view (A) Side view of the state which has changed the circumferential direction position of the slack prevention member, (b) Front view Side view showing an in-pipe working device according to a second embodiment. FIG. 8 is a plan view of the in-pipe work apparatus. Front view of the in-pipe working device of FIG. Front view showing a state in which the loosening prevention member is mounted in the main pipe

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branch pipe 1a Inner surface 2 Wedge member 3 Insertion means 4 Head mechanism 5 Rotation mechanism 5a Turned side part 6 Moving means 7 Fixing mechanism 21 Bracket 23 Insertion mechanism 23a Inserted side part S Communication cable support

Claims (2)

An in-pipe working device for moving a substantially semi-annular spring-plate cable support fixed to the inner wall surface of the pipe in the pipe,
A fitting insertion member that is movable in the direction of diameter reduction with respect to the diameter of the conduit, and that has a pair of left and right tips pointed between both ends of the spring plate cable support and the inner wall surface; and the fitting A head mechanism provided with a pair of left and right lateral expansion / contraction drive means, each of which has an insertion member attached thereto and forcibly moves the pair of fitting insertion members in the diameter reducing direction;
A vertical bracket telescopic drive means supported by the head mechanism, wherein a concave bracket is attached to the tip, and the concave bracket is moved in the vertical direction;
A rotation mechanism for rotating the head mechanism in the circumferential direction;
A moving means for supporting the rotating mechanism and moving in the pipe axis direction in the pipe;
An outrigger capable of coming into contact with the inner wall surface, a vertical extension drive means fixed to the moving means, the outrigger being attached to the tip, and moving the outrigger in the up-down direction ;
A fixing mechanism capable of relatively fixing and releasing the moving means relative to the pipe line by moving the outrigger in the vertical direction by the vertically extending and retracting driving means ;
The in-pipe operation is characterized in that the concave bracket is moved up and down by the bracket extension / contraction drive means so as to be able to engage and disengage from a cable support portion protruding in an inner diameter direction of the spring plate cable support. apparatus. The pair of fitting members are arranged between the inner wall surface and the spring plate cable support by being arranged between the rotating mechanism and the head mechanism and moving the head mechanism along the tube axis direction. The in-pipe working apparatus according to claim 1, wherein an insertion mechanism that can be inserted between the two is provided.

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