JP2021161684A - Work truck - Google Patents

Abstract

To provide a work truck that enables selective installation of devices suitable for several different operations inside an existing pipeline when performing these operations inside the existing pipeline.SOLUTION: A work truck A for working inside a pipeline B connected to a manhole comprises: two traveling members 10 and 20 that are provided with a plurality of rollers 10a and 20a; a bow-shaped frame 30 that is provided with shaft parts 30a and 30b formed at both ends in a longitudinal direction and a base part 30c formed at a position eccentric from an axial center of the shaft parts, and is rotatably supported by the two traveling members via the shaft parts, in which the base part is provided with a mounting seat 33a on which a work device is mounted for performing preset work on the pipeline and an elevating member 32 for elevating and lowering the mounting seat; a drive motor 11 that is disposed on one of the traveling members 10 and rotates the bow-shaped frame; and outriggers 13 and 23 that are disposed on the two traveling members and come into contact with an inner peripheral surface of the pipeline to make the traveling members inoperable, or release the contact with the inner peripheral surface of the pipeline to allow the traveling members to travel.SELECTED DRAWING: Figure 1

Description

The present invention relates to a work carriage capable of selectively attaching a device suitable for a target work when performing several different operations inside an existing pipeline, and particularly to a breakage guiding portion in the existing pipeline. It relates to a work trolley that is advantageous to use when forming.

In the existing sewerage pipeline, the pipeline may be bent due to the influence of land subsidence or an earthquake, or the pipes constituting the pipeline may be damaged such as broken. If the sewerage pipeline is damaged, groundwater will flow in from this damaged part, which not only imposes a heavy burden on the treatment equipment on the downstream side, but also causes the road surface to collapse, so repair it promptly. It is necessary and enormous cost is incurred. In particular, since the manhole pipe opening and the pipe connection are severely damaged during an earthquake, earthquake countermeasures for pipelines are required.

For this reason, recently, in the case of a new pipeline, a flexible joint is provided in advance at the pipe opening, and in the case of an existing pipeline, a guide consisting of a groove is formed on the inner peripheral surface of a predetermined portion of the pipe constituting the pipeline. As a seismic measure, a construction method is used to form joints, guide the starting point of damage to these guided joints, and absorb seismic motion.

When the pipeline is damaged starting from the guide joint formed on the inner surface, it is necessary to prevent groundwater from entering the pipeline from this damaged part. Therefore, by arranging the elastic sleeve facing the guide joint and pressing the elastic sleeve against the inner peripheral surface of the pipeline with a metal sleeve having high strength, the intrusion of groundwater from the guide joint can be prevented. (See, for example, Patent Document 1).

In this way, the part (breaking guide part) that defines the position of damage that may occur in the pipeline cannot be realized by the guide joint alone, and an elastic sleeve, metal sleeve, etc. are also required, and the guide joint is further formed. A sealing material to be filled is also required.

JP-A-2019-223444

As described above, when the fracture guidance portion is formed in the existing pipeline, the work of forming the guide joint, the work of filling the guide joint with the sealing material, and the work of expanding the diameter of the metal sleeve arranged on the inner diameter side of the elastic sleeve. Some work is required. Since each of these operations has no elements in common with each other, the actual situation is that each operation is performed using an independent device.

In particular, in the case of an existing pipeline laid by a small-diameter pipe, or when the position of the guide joint to be formed in the existing pipeline is far away from the pipe opening of the manhole, the guide joint is provided on the inner peripheral surface of the pipeline. It is not easy to perform a series of operations of forming, filling the guide joint with a sealing material, arranging an elastic sleeve facing the guide joint filled with the sealing material, and expanding the diameter of the metal sleeve.

Therefore, it is advantageous to have a device that can be commonly used for some operations, and development of such a device is required.

An object of the present invention is to provide a work carriage capable of selectively attaching a device suitable for these operations when performing several different operations inside an existing pipeline.

A typical work trolley according to the present invention for solving the above problems is a work trolley for working inside a pipeline connected to a manhole, and includes two traveling members provided with a plurality of rollers and two traveling members. It has a base portion formed at a position eccentric from the axial center of the shaft portion between the shaft portions formed at both ends in the longitudinal direction and the shaft portion, and the two running through the shaft portion. A mounting seat that is rotatably supported by the member and that mounts a work device for performing preset work on the pipeline connected to the manhole on the base portion and an elevating member that raises and lowers the mounting seat. The provided bow-shaped frame, a drive motor that is arranged on one of the two traveling members and rotates the bow-shaped frame, and at least one of the two traveling members are arranged on the traveling member. It has an out-trigger that abuts on the inner peripheral surface of the pipeline to make the traveling member inoperable, or releases the contact with the inner peripheral surface of the pipeline to allow the traveling member to travel. ..

In the work cart according to the present invention, some operations on the inner peripheral surface of the pipes constituting the existing pipeline can be reasonably performed.

That is, after the work trolley with a device suitable for the work set in advance on the inner peripheral surface of the pipes constituting the existing pipeline is mounted on the mounting seat, the work trolley is driven to the position to be worked in the existing pipeline. By operating the outrigger, it can be fixed at the desired working position. Then, the mounting seat is brought close to the inner peripheral surface of the existing pipeline by the elevating member, and the bow-shaped frame is rotated by the drive motor while operating the mounted device, so that the device performs the desired work on the inner peripheral surface. be able to.

It is a side view explaining the structure of the work trolley which concerns on this Example. FIG. 2 is a cross-sectional view taken along the line IIa and IIb of FIG. It is a side view of the work trolley which attached the cutting device to the attachment seat. It is a side view of the work trolley which attached the seal material filling device to the mounting seat. It is a side view of the work trolley which attached the diameter expansion device of the metal sleeve to the mounting seat. FIG. 5 is a plan view of FIG. FIG. 5 is a sectional view taken along line VII of FIG. It is a figure explaining the example of the member which runs a work carriage in an existing pipeline.

The work cart according to the present invention selects a device suitable for the target work when performing some work on the inner peripheral surface of the pipe constituting the existing pipe (hereinafter, simply referred to as “pipeline”). It is configured so that the device can be moved to a working position inside the pipeline.

In the bow-shaped frame constituting the work carriage, shaft portions serving as rotation centers are formed at both ends, and a base portion eccentric from the axial center of the shaft portion is formed between the shaft portions. Further, a mounting seat for mounting the work device and an elevating member for raising and lowering the mounting seat are arranged on the base portion. For this reason, by attaching a work device capable of rationally performing the desired work on the pipeline to the mounting seat in advance, the elevating member is operated to bring the work device closer to the inner peripheral surface of the pipeline. It can be separated or separated. Then, by operating the drive motor, the bow-shaped frame can be rotated around the shaft portion.

Therefore, the work trolley to which the work device for performing the desired work is attached in advance is moved to the target work position in the pipeline, and the work device, the elevating member, and the drive motor are operated to operate the work device. It becomes possible to perform the desired work by.

The means for moving the work trolley to the target position is not particularly limited. For example, a traveling motor may be attached to either of the two traveling members so that the vehicle can run on its own. Is also good. That is, it does not limit whether the vehicle runs on its own or uses other power.

The work cart according to the present invention is capable of bringing the work device attached to the mounting seat into contact with or close to the inner peripheral surface of the pipe constituting the pipeline and rotating the work device along the inner peripheral surface. It is configured in. For this reason, it is preferable to use it when performing work in contact with the inner peripheral surface of the pipe partially or over the entire circumference, for example, cleaning of the inner peripheral surface, cutting, filling of a sealing material, and the like. ..

Hereinafter, preferred embodiments of the work cart according to the present invention will be described with reference to FIGS. 1 and 2. The work cart A has two traveling members 10 and 20 provided with a plurality of rollers 10a and 20a, respectively, and the bow-shaped frame 30 is rotatably supported by these traveling members 10 and 20. Has been done.

In this embodiment, the work cart A is configured to be pushed into the inside of the pipeline B by the push rod 17 shown in FIG. 8 to travel and reach a preset work position. Here, the configuration of the push rod 17 will be described. The push rod 17 is configured to have a main body portion in which a plurality of rod-shaped bodies 17a having a unit length are connected in the longitudinal direction, and a handle 17b attached to one end of the main body portion in a T shape.

Holes 17c are formed at predetermined positions of the respective rod-shaped bodies 17a constituting the main body of the push-in rod 17, and the work is performed by connecting the holes 17c to the connecting member 12 of one of the traveling members 10 described later. It is configured to be integrated with the trolley A. Further, a scale 17d as a guideline for the pushing length is formed on the side surface of the rod-shaped body 17a, and it is possible to know the pushing length in the conduit B of the work cart A by the scale 17d.

Since the work cart A can be pushed into the pipeline B by the push rod 17 as described above, the target work position with respect to the pipeline B is close to the manhole, but the diameter of the pipeline B is small and the worker can push the work cart A into the pipeline B. It is advantageous to use it when it is not possible to enter the pipeline B.

A drive motor 11 for rotating the bow-shaped frame 30 is arranged on one of the traveling members 10 of the work cart A. Further, a connecting member 12 for connecting the push rod 17 is formed in a protruding shape on the traveling member 10. The connecting member 12 is configured so that the pushing rod 17 can be inserted and connected, and a connecting member 12a such as a plunger, which can be connected to and detached from the pushing rod 17 at a predetermined position, is arranged. Has been done.

A camera case 21 having a built-in camera for photographing the inside of the pipeline B is arranged on the other traveling member 20. The camera case 21 is attached to one end 22a of the support frame 22 formed in a bow shape. Further, the end portion 22b on the other side of the support frame 22 is rotatably supported by the rotation support portion 22c provided on the traveling member 20. The support frame 22 is arranged so as to project like a cantilever with respect to the traveling member 20. Therefore, the support frame 22 is arranged on the opposite side of the traveling member 20 from the side on which the bow-shaped frame 30 is arranged.

In particular, the camera case 21 and the rotation support portion 22c are arranged on substantially the same axis (preferably the central axis of the conduit B), and the support frame 22 is formed in a bow shape. The bow portion of the support frame 22 is always below the axis. Therefore, regardless of whether the work cart A is tilted or not, the top of the pipeline B is always located above in the image captured by the camera built in the camera case 21. That is, in the captured image, the vertical direction always coincides with the vertical direction.

If the camera arranged inside the camera case 21 has a function of always recognizing the vertical direction, the vertical direction corresponding to the posture of the camera accompanying the rotation of the support frame 22 and the vertical direction of the camera By comparing with the vertical direction by the function, it is possible to obtain an image in which the vertical direction is defined more accurately.

Outriggers 13 and 23 are arranged on the two traveling members 10 and 20, respectively. The outriggers 13 and 23 are arranged on the surface opposite to the surface on which the rollers 10a and 20a are provided, and when these outriggers 13 and 23 are operated, the work cart A cooperates with the rollers 10a and 20a. Can be fixed to the inner peripheral surface of the pipeline B.

In the bow-shaped frame 30, shaft portions 30a and 30b are formed on the same rotating shaft 31 at both ends in the longitudinal direction, and positions are eccentric between these shaft portions 30a and 30b and from the rotating shaft 31. A base portion 30c is formed on the base portion 30c. The shaft portion 30a is rotatably supported by a rotation support member 14 formed on one traveling member 10, and the shaft portion 30b is rotatably supported by a rotation supporting member 24 formed on the other traveling member 20. There is.

Therefore, the bow-shaped frame 30 is configured to rotate around the shaft portions 30a and 30b at both ends that coincide with the rotation shaft 31, and the base portion 30c can rotate eccentrically with this rotation. Therefore, when the work cart A is installed in the pipeline B, the rotation shaft 31 is substantially aligned with the axis of the pipeline B, so that the bow-shaped frame 30 is substantially aligned with the axis of the pipeline B and is rotated. It becomes possible to make it.

The drive system of the bow-shaped frame 30 by the drive motor 11 is not limited, and for example, a normal transmission mechanism such as a timing belt or a chain may be used. In this embodiment, the drive motor 11 is attached to the gear 11b via the intermediate shaft 11a, and the shaft portion 30a of the bow frame 30 is attached to the gear 11c that meshes with the gear 11b. It is configured to rotate.

An elevating member 32 is arranged on the base portion 30c of the bow-shaped frame 30, and a mounting seat 33a is arranged on the elevating member 32. As shown in FIG. 2, the base portion 30c is formed in a groove shape composed of a web 30c1 and a flange 30c2, and an elevating member 32 is attached to the web 30c1. Further, shaft portions 30a and 30b are formed at both ends of the flange 30c2 forming the base portion 30c in the longitudinal direction by using the flange 30c2.

The elevating member 32 raises and lowers the mounting seat 33a so that the working device attached to the mounting seat 33a approaches or separates from the inner peripheral surface of the pipeline B. Therefore, the structure is not limited as long as it has this function, and for example, it is possible to adopt a structure having a cylinder that raises and lowers the mounting seat 33a by supplying a pressure fluid.

In this embodiment, the elevating member 32 is configured by a pantograph type jack. The elevating member 32 has a fixed piece 32a fixed at a predetermined position on the traveling member 10 side of the base portion 30c of the bow-shaped frame 30, and a moving piece 32b on which a female screw (not shown) is formed on the traveling member 20 side. Is placed. A pair of link pieces 32c are rotatably attached to each of the fixed piece 32a and the moving piece 32b. The mounting seat 33a is attached to the end side of the link piece 32c facing the fixed piece 32a, and the sliding piece 33b is attached to the end side facing the moving piece 32b.

Further, an elevating motor 34 to which an elevating screw 34a is attached is arranged on the base portion 30c. The elevating screw 34a is screwed into a female screw formed on the moving piece 32b, and the tip portion thereof is rotatably supported with respect to the fixing piece 32a. Therefore, when the elevating motor 34 is rotated in a desired direction, the moving piece 32b moves in the direction of approaching or separating from the fixed piece 32a along with this rotation, and the mounting seat 33a and the sliding piece 33b move with this movement. Goes up and down. At this time, the mounting seat 33a moves up and down substantially linearly in the radial direction of the pipe line B, but the sliding piece 33b moves in the pipe axis direction of the pipe line B with respect to the movement in the radial direction of the pipe line B. It is synthesized. Therefore, the sliding piece 33b approaches the mounting seat 33a when ascending, and separates from the mounting seat 33a when descending.

Therefore, the work device to be attached to the work carriage A is fixed to the attachment seat 33a and mounted on the sliding variable 33b, and the elevating member 32 is operated to move the attached work device in the radial direction of the pipeline B. It can be raised and lowered almost linearly.

Further, a camera 15 is arranged at a predetermined position of one of the traveling members 10, and together with a camera (not shown) housed in the camera case 21 described above, the position of the work cart A in the pipeline B and the work device. It is configured so that it can be monitored and the progress of work can be confirmed.

In the figure, reference numeral 25 denotes a roller having a diameter larger than that of the roller 20a provided on the traveling member 20, and if an obstacle exists when the work carriage A is traveled in the pipeline B, this obstacle is present. It is arranged so that it is easy to get over objects.

In the work cart A configured as described above, the mounting seat 33a and the sliding piece 33b are lowered by the elevating member 32, and the working device is mounted and fixed to the mounting seat 33a. After that, the push rod 17 can be connected to the connecting member 12 so that the worker can travel from a manhole (not shown) to a working position set in the pipeline B.

Then, the outriggers 13 and 23 are operated in accordance with the desired work to fix the work carriage A to the inner peripheral surface of the pipeline B. After that, the target work is started by bringing the work device closer to the inner peripheral surface by the elevating member 32 while operating the work device. Further, according to the target work, the drive motor 11 is operated to rotate the bow-shaped flange 30 around the axis 31, so that the work device can be moved along the inner peripheral surface of the pipeline B for the purpose. It is possible to do the work of.

Next, an embodiment in which a work device for performing the desired work is attached to the work cart A will be described. First, the working device shown in FIG. 3 is a cutting device C, which is advantageous when used when forming a groove serving as a guide joint on the inner peripheral surface of the pipeline B.

The cutting device C has a cutting tool 41 having a preset width (thickness) and a drive motor 42 for driving the cutting tool 41 in order to form a groove on the inner peripheral surface of the pipeline B. The drive motor 42 is attached to the base plate 43. One end side of the base plate 43 is fixed to the mounting seat 33a of the elevating member 32, and the other end side is placed on the sliding piece 33b.

In the cutting device C configured as described above, the work cart A is driven to a position where a groove should be formed on the inner peripheral surface of the pipeline B, and then fixed to the inner peripheral surface by the outriggers 13 and 23. After that, the base plate 43 is raised by the elevating member 32 to bring the cutting tool 41 closer to the inner peripheral surface of the pipeline B, and the cutting tool 41 is rotated by the drive motor 42 with respect to the inner peripheral surface of the pipeline B. It is possible to start cutting. Then, by driving the drive motor 11 arranged on the traveling member 10 to rotate the bow-shaped frame 30, it is possible to form a groove on the inner peripheral surface of the pipeline B over the entire circumference. Further, by raising the base plate 43 by the elevating member 32 with the rotation of the bow-shaped frame 30, it is possible to form a groove having a desired depth on the inner peripheral surface of the pipeline B.

The working device shown in FIG. 4 is a sealing material filling device D, which is advantageous when used for filling the groove formed by the cutting device C with the sealing material. The seal material filling device D includes a seal material filling gun 46 and a filling nozzle 47 attached to the seal material filling cancer 46, and the seal material filling gun 45 is attached to the base plate 48. One end side of the base plate 47 is fixed to the mounting seat 33a of the elevating member 32, and the other end side is placed on the rubbing member 33b. In particular, a camera 49 is arranged in the vicinity of the filling nozzle 47 with the tip end portion of the filling nozzle 47 in view.

In the sealing material filling device D configured as described above, the work cart A is driven so that the filling nozzle 47 faces the groove while monitoring the groove formed on the inner peripheral surface of the pipeline B by the camera 49. After that, the base plate 48 is raised by the elevating member 32, the filling nozzle 47 is inserted into the groove to fill the seal material, and the drive motor 11 arranged in the traveling member 10 is monitored while monitoring the filling status of the seal material in the groove. By driving and rotating the bow-shaped frame 30, it is possible to fill the groove formed on the inner peripheral surface of the pipeline B with the sealing material.

The working device shown in FIGS. 5 to 7 is a diameter expanding device E. For example, after filling a groove formed on the inner peripheral surface of a pipeline B with a sealing material, an elastic sleeve and a metal sleeve are placed so as to face the groove. It is advantageous to arrange and use it to expand the diameter of the metal sleeve and press the elastic sleeve against the inner peripheral surface. Specifically, as described in Patent Document 1, the metal sleeve is secondarily expanded as the wedges provided on the metal sleeve whose primary diameter is completed are brought closer to each other.

The diameter-expanding measure E includes a pair of contact members 51, a reciprocating drive member 52 that separates or brings the contact pieces 51 away from each other, and a guide member 53 that guides the moving direction of the contact member 51. , The guide member 53 is attached to the base plate 54. Further, two cameras 55 are arranged at predetermined positions of the base plate 54. One end side of the base plate 54 is fixed to the mounting seat 33a of the elevating member 32, and the other end side is placed on the sliding piece 33b. The structure of the reciprocating drive member 52 is not particularly limited, but a hydraulic cylinder is preferable.

In the diameter expanding device E configured as described above, the contact member 51 is set to a height lower than the inner diameter of the metal sleeve by the elevating member 32 in a state where the pair of contact members 51 are sufficiently separated from each other. , The work trolley A is driven to the inside of the metal sleeve. Next, without operating the outriggers 13 and 23, the elevating member 32 is operated so that each of the contact members faces a wedge (not shown). After that, when the reciprocating drive member 52 is operated to bring the abutting members 51 closer to each other, each of the abutting members 51 abuts on the wedge, and as the abutting member 51 further approaches, the metal sleeve is expanded by the wedge. The diameter progresses. Then, when the diameter of the metal sleeve is sufficiently expanded, the elastic sleeve can be pressed against the inner peripheral surface of the pipe line B.

The work cart according to the present invention can selectively mount different work devices on the mounting seats. Therefore, for example, it is advantageous to use it when cutting the guide joint on the inner peripheral surface of the pipeline, filling the seal material on the guide joint, and installing the elastic sleeve and the metal sleeve facing the guide joint. ..

A Work trolley B Pipeline C Cutting device D Seal material filling device E Diameter expansion device 10, 20 Traveling member 10a, 20a, 25 Roller 11 Drive motor 11a Intermediate shaft 11b, 11c Gear 12 Connecting member 12a Coupling member 13, 23 Out trigger 14 , 24 Rotational support member 15, 49, 55 Camera 17 Push rod 17a Rod-shaped body 17b Handle 17c Hole 17d Scale 21 Camera case 22 Support frame 22a, 22b End 22c Rotational support 30 Bow frame 30a, 30b Shaft 30c base Base 30c1 Web 30c2 Flange 31 Rotating shaft 32 Lifting member 32a Fixed piece 32b Moving piece 32c Link piece 33a Mounting seat 33b Rubbing piece 34 Lifting motor 34a Lifting screw 41 Cutting tool 42 Drive motor 43, 48, 54 Base plate 46 Seal Material filling gun 47 Filling nozzle 51 Contact member 52 Reciprocating drive member 53 Guide member

Claims (5)

A work trolley for working inside a pipeline connected to a manhole.
Two traveling members with multiple rollers and
It has a base portion formed at a position eccentric from the axial center of the shaft portion between the shaft portions formed at both ends in the longitudinal direction and the shaft portion, and the two running through the shaft portion. A mounting seat that is rotatably supported by the member and that mounts a work device for performing preset work on the pipeline connected to the manhole on the base portion and an elevating member that raises and lowers the mounting seat. The bow-shaped frame provided and
A drive motor that is arranged on one of the two traveling members and rotates the bow-shaped frame, and
It is arranged on at least one of the two traveling members and abuts on the inner peripheral surface of the pipeline to make the traveling member inoperable, or releases the contact with the inner peripheral surface of the pipeline. A work trolley characterized by having an outrigger that enables the traveling member to travel. It has a camera formed in a bow shape and arranged at one end in the longitudinal direction, and a shaft portion formed at the other end, and the other of the two traveling members via the shaft portion. The work cart according to claim 1, further comprising a support frame rotatably supported on a side opposite to the side supporting the bow-shaped frame. The work preset for the pipeline connected to the manhole is the work of forming a groove on the inner peripheral surface of the pipeline, and drives the cutting tool and the cutting tool on the mounting seat of the bow-shaped frame. A cutting device with a drive member is attached
It is configured that the mounting seat is raised by the elevating member and the bow-shaped frame is rotated by the drive motor, and a groove can be formed over the entire inner peripheral surface of the pipeline by the cutting device. The work trolley according to claim 1 or 2 as a feature. The work preset for the pipeline connected to the manhole is the work of filling the groove formed on the inner peripheral surface of the pipeline with the sealing material, and the mounting seat of the bow-shaped frame is filled with the sealing material. The device is installed,
The mounting seat is raised by the elevating member so that the seal filling device is brought close to the inner peripheral surface of the pipeline so that the groove formed on the inner peripheral surface can be filled with the sealing material. The work cart according to claim 1 or 2 as a feature. Work preset for the pipeline connected to the manhole is arranged on the inner diameter side of the elastic sleeve and the circumference arranged so as to face the groove formed on the inner peripheral surface of the pipeline. The diameter of the metal sleeve is expanded by engaging a wedge formed at one end in the direction and at the end in the width direction with a wedge formed at the other end in the circumferential direction. A pair of contact members that come into contact with each wedge temporarily fixed to the inclined portion of the metal sleeve on the mounting seat of the bow-shaped frame, and a driving member that brings the contact members closer to or apart from each other. A diameter expansion device with and is attached,
The diameter expanding device is arranged inside the metal sleeve with the pair of contact members separated from the inner peripheral surface of the metal sleeve by the elevating member, and the pair of abutting members are arranged by the elevating member. Is opposed to each of the wedges, and then the contact member is brought into contact with each of the wedges by the driving member, and the wedges are brought close to each other along an inclined portion formed at an end portion of the metal sleeve. The work cart according to claim 1 or 2, wherein the metal sleeve is configured so as to be able to expand the diameter.

Images