JP2010024819A - Pipe conveying truck and pipe conveying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and safely perform new pipe carry-in work to an existing pipe. <P>SOLUTION: A truck frame 2 of this pipe conveying truck 1 is provided with two pipe lifting cylinders in an upright state. The upper end of each cylinder is connected to a beam 7, and an elastic member 9 is provided on the upper face side of the beam 7. Hydraulic jacks 10 having rods that can project upward or contract are provided at both ends of the beam 7, and each rod is provided with a rotating shaft 13. A roller 14 is further provided at the upper end of the rotating shaft 13, and the relative height of the elastic member 9 and the roller 14 can be changed by the projection/contraction of the rod. When conveying a new pipe P1, the new pipe P1 is supported by the elastic member 9 to prevent the movement of the new pipe P1. When aligning the new pipes P1 with each other, the new pipes P1 are supported by the rollers 14 and rotated in a circumferential direction of a pipe axis to easily perform the mutual connection work of the new pipes P1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a pipe transport carriage used when a new pipe is carried into an existing pipe such as a water supply / sewerage system or an agricultural waterway or a tunnel.

  In the construction method (pipe-in-pipe construction method) in which existing carriages such as aging water and sewage / agricultural canals and new pipes are installed in the canal and the existing pipes are renewed. It is used when carrying in new pipes. In this construction method, a shaft is formed at the end of the existing pipe to be renewed to secure a space for carrying in the new pipe, and the new pipe is lowered from the ground to the space, and then the new pipe is installed on the inner surface side with the carriage. From the front and back of the new pipe and transported by running wheels. The entire existing pipe is renewed by connecting them while sequentially carrying these new pipes.

  As a dolly used in the construction method, a telescopic member such as a hydraulic jack provided with a roller at the upper end is attached to the dolly frame, and the new pipe is supported from the inner surface by this roller, and the new pipe is arranged on the inner surface (floor surface) of the existing pipe. What is conveyed in the state which floated from is disclosed (for example, refer patent document 1).

  As the roller, a roller having a rotation direction along the tube axis direction of the new tube and a roller having a rotation direction along the tube axis circumferential direction of the new tube are provided independently. Then, the expansion and contraction of the expansion / contraction member provided with each roller is individually adjusted, and the new tube is supported by the roller in any rotation direction, thereby conveying the new tube in the tube axis direction and in the tube axis circumferential direction. The rotation is alternately performed and the new pipes are connected while being aligned.

JP 2006-22618 A

  In the cart shown in Patent Document 1, since the rotation directions of the two rollers are different from each other, one roller supports the inner surface of the new pipe when moving in the tube axis direction or rotating in the tube axis circumferential direction. On the other hand, it is necessary to adjust the expansion / contraction of each elastic member supporting the roller so that the other roller is separated from the inner surface. For this reason, this adjustment work becomes complicated, and the work often takes a lot of time.

  Furthermore, when the weight of the new pipe to be transported is large, it is necessary to increase the number of rollers to disperse the load applied to each roller. In this case, the number of elastic members to be adjusted increases. The complexity of adjusting the expansion / contraction is remarkably increased. For this reason, more manpower and time are required for the adjustment work, and the work cost is greatly increased.

  In addition, during transportation of the new pipe, so-called rolling may occur in which the traveling wheel of the carriage gradually tilts along the inner peripheral surface of the pipe. Due to this rolling, the carriage and the new pipe being transported are likely to be unstable, and the safety of the work may be reduced.

  Accordingly, an object of the present invention is to make it possible to easily and safely carry and connect a newly installed pipe to an existing pipe.

  In order to solve the above-mentioned problems, the present invention is provided with a plurality of stretchable members standing upright on the carriage frame, supporting the inner surface of the new tube on the upper end side of the stretchable member, and connecting the new tube from the inner surface of the existing tube. In a tube transport carriage that is transported through the existing pipe in a floating state, a beam for connecting the upper ends of the respective expansion and contraction members is provided, an elastic member is provided on the upper surface side of the beam, and the beam is attached to the beam. A plurality of rotating shafts that can be protruded and stored upward, and can be rotated around the shaft center, a roller is provided at the upper end of each rotating shaft, and the rotating shaft is stored when the new pipe is conveyed. The upper end of the roller is prevented from protruding from the upper end of the elastic member, and the load of the new pipe to be conveyed is received by the elastic member, while the rotating shaft is aligned during the alignment for connecting the new pipes together. Protruding upward, front The upper end of the roller protrudes from the upper end of the elastic member, and the load of the new pipe is received by the roller, and the rotation axis of the roller is rotated around the axis to move the roller in the direction in which the new pipe is to be moved. A configuration for performing the alignment is adopted.

  The beam is supported by at least two elastic members, and the height of the beam can be freely adjusted by adjusting the expansion and contraction of each elastic member. As this expansion / contraction member, a member that can adjust the protruding amount in the standing direction (that is, upward) as required, such as a hydraulic cylinder, is preferable.

  The carriage frame is inserted into a newly installed pipe, and traveling wheels provided on the carriage frame are projected from the front and rear of the newly installed pipe and grounded. And each elastic member is made to protrude upward, the elastic member is brought into contact with the upper part of the inner surface of the new pipe, and the new pipe is made to float from the grounding surface (existing pipe). By using, for example, a sheet-like rubber or a porous member as the elastic member, it is possible to prevent the inner surface of the new pipe from being damaged during conveyance.

  In this conveyance, it is preferable that the rotating shaft provided on the beam is accommodated and the roller provided on the upper end of the rotating shaft is separated from the inner surface of the new pipe. In this way, the new pipe is supported only by the elastic member, and a stable support state can be obtained by the anti-slip action by the elastic member, and vibration accompanying the conveyance of the new pipe is not transmitted to the roller. It is possible to prevent the support position of the new pipe from being inadvertently shifted.

  On the other hand, when positioning the new tubes, the new shaft was slightly lifted from the elastic member by projecting the rotating shaft upward and bringing the roller at the upper end into contact with the inner surface of the new tube. As a state, the anti-slip action of the new pipe by the elastic member is released. Then, by rotating the rotating shaft in accordance with the rotation direction of the roller in the direction in which the new pipe is to be moved (arbitrary direction between the pipe axis direction of the new pipe and the pipe shaft circumferential direction), the positioning can be freely performed. It can be carried out.

  Moreover, in the said structure, while supporting the said rotating shaft by the bearing fixed to the said beam, a handle is provided in this rotating shaft, and the rotation angle of a rotating shaft can be adjusted by this handle operation. .

  The type of the bearing can be selected as appropriate, but it is particularly preferable to use a bush formed such that a solid lubricant such as graphite or tetrafluoroethylene resin is interposed on the sliding surface. This is because the bush can be easily reduced in size as compared with a bearing using rolling elements such as rollers, and is excellent in cost because of its simple structure. The bush may be made of metal or resin, but it is more preferable to use a metal bush from the viewpoint of durability.

  Also, by providing the handle, an operator who moves with the carriage can easily adjust the direction of the roller by operating the handle. For this reason, it is possible to smoothly align the positions of the newly installed pipes, and it is possible to shorten the time for connecting work and reduce the work cost.

  In this transfer operation, since the carriage travels inside the existing pipe having a circular cross section, the carriage tends to tilt along the cross section, and the attitude of the carriage and the new pipe often becomes unstable. In this case, as in the above-described alignment, the rotating shaft protrudes upward to support the new tube with the roller, and the handle of the rotating shaft is operated so that the rotation direction of the roller is perpendicular to the tube axis direction. Adjust so that If it does so, a roller will rotate with the dead weight of a new installation pipe, and this new installation pipe will move to a stable position (position where the gravity center of a new installation pipe becomes lower) (it rotates to a pipe axis peripheral direction). Thereby, the attitude | position of a trolley | bogie can be stabilized and the improvement of the safety | security in an operation | work can be anticipated.

  Instead of providing a roller at the upper end of the rotating shaft as described above, a beam is provided for connecting the upper ends of the expansion and contraction members, and the beam is provided in both the traveling direction of the carriage frame and the direction perpendicular thereto. A plurality of omnidirectional casters that can be freely rotated are provided, and a new pipe supported by the omnidirectional casters can be moved in the tube axis direction and rotated in the tube axis circumferential direction.

  In this configuration, similarly to the configuration described above (the configuration in which a roller is provided at the upper end of the rotating shaft), the beam is supported by a plurality of elastic members, and the height of the beam is freely adjusted by adjusting the expansion and contraction of each elastic member. I am doing so. As this expansion / contraction member, a member that can adjust the protruding amount in the standing direction (that is, upward) as required, such as a hydraulic cylinder, is preferable.

  In the conveyance of the new pipe by the carriage, it is inserted into the new pipe carrying the carriage frame, and the expansion / contraction adjustment of each expansion / contraction member is performed so that the pipe axis direction and the inclination direction of the beam are substantially parallel. By aligning the omnidirectional casters provided on the beam with the inclination direction of the beam and the new pipe, all the omnidirectional casters can be brought into contact with the inner surface at the same time.

  The omnidirectional caster has a main roller that rotates around a fixed rotation axis, and a plurality of sub-rollers that rotate around an auxiliary rotation axis along the rotation direction of the main roller, While the main roller is moved in the tube axis direction, the child roller may be rotated in the tube axis circumferential direction.

  The omni-directional caster rotates the main roller and the child roller at the same time in the direction of the resultant force smoothly even when a force in the traveling direction and a direction perpendicular thereto are simultaneously applied to the carriage frame. Move the dolly. For this reason, in the carriage shown in the background art, the new pipe is compared with the case where the rollers in each direction are separately brought into contact with the inner surface of the new pipe to support the new pipe and move in each direction. Positioning work associated with the connection between each other can be quickly performed.

  In the configuration employing the omnidirectional casters as described above, the instability of the cart can be expected to be eliminated when rolling occurs in the cart, similarly to the configuration in which the roller is provided at the upper end of the rotating shaft described above. That is, the child roller of the omnidirectional caster is rotated by its own weight, and this new pipe moves (rotates in the circumferential direction of the pipe axis) to a stable position (a position where the center of gravity of the new pipe becomes lower). Thereby, like the above-mentioned, stability of a trolley | bogie improves and it can anticipate the improvement in the safety | security in an operation | work.

  In each of the above-described configurations, the telescopic members may be simultaneously expanded and contracted while maintaining the parallel state of the carriage frame and the beams. However, the beams and the telescopic members are connected via hinges, and the hinges are connected. By changing the angle, the angle between the carriage frame and the beam can be freely adjusted.

  In this way, by allowing the angle between the carriage frame and the beam to be freely adjusted, for example, the inner surface of the other new pipe to which one of the traveling wheels before and after the carriage carrying the new pipe is connected. Even when the carriage frame itself is inclined, the new pipes to be connected can be arranged in a straight line. Accordingly, the new pipes can be easily connected to each other, and the new pipe can be stably held by the elastic member or the omnidirectional caster provided on the beam.

  According to the present invention, a roller is provided at the upper end of the rotating shaft, and the new tube is supported by this roller or by an omnidirectional caster, and is supported by the roller or the omnidirectional caster at the time of alignment in the connecting operation of the new tubes. The newly installed pipe was easily moved in the pipe axis direction or rotated in the pipe axis circumferential direction. For this reason, it is possible to easily carry in the new pipes and align the new pipes with each other, and it is possible to reduce personnel and work costs required for the connecting work.

  In addition, when the carriage rolls in the existing pipe during the transfer work of the new pipe, the new pipe rotates to a stable position by its own weight. Thereby, the attitude | position of a trolley | bogie is stabilized and the improvement of the safety | security in an operation | work can be anticipated.

The side view which shows one Embodiment of the bogie for pipe | tube conveyance concerning this invention AA cross-sectional view of the tube conveying carriage shown in FIG. Bottom view of the pipe transport carriage shown in FIG. The side view which shows the principal part of the trolley | bogie for pipe conveyance shown in FIG. FIG. 1 shows a state in which a newly installed pipe is lifted by the pipe transporting carriage shown in FIG. 1 (a state in which the carriage is running), (a) is a side view, and (b) is a sectional view taken along line BB in (a). Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Action diagram showing the process of pipe conveyance Front view showing a state where rolling has occurred during transportation The side view which shows other embodiment of the bogie for pipe | tube conveyance concerning this invention Bottom view of the tube transfer carriage shown in FIG. Side view showing still another embodiment of the carriage for pipe conveyance according to the present invention. An example of an omnidirectional caster is shown, (a) is a side view, (b) is a front view. Front view showing a state where rolling has occurred during transportation

  1 to 3 show an embodiment of a tube conveying carriage 1 (hereinafter simply referred to as “cart”) according to the present invention. Two hydraulic pipe raising / lowering cylinders 3 are fixed upright on the carriage frame 2 of the carriage 1, and the upper end side of the rod 4 of the pipe raising / lowering cylinder 3 is parallel to the rod 4. A beam support 5 is provided. The beam support 5 is supported by a support member 6 so as to be movable up and down, and moves up and down as the rod 4 protrudes and is housed. The beam support 5 and the beam 7 are connected via a hinge 8. Further, an elastic member 9 made of sheet rubber is provided on the upper surface of the beam 7.

  A hydraulic jack 10 shown in FIG. 4 is fixed to both ends of the beam 7, and the hydraulic jack 10 has a rod 11 that can protrude and retract upward. A rotating shaft 13 is coaxially provided at the upper end of the rod 11 via a metal bush 12 having a sliding surface provided with a solid lubricant. A roller 14 made of a resin material is provided at the upper end of the rotary shaft 13, and protrudes laterally from the rotary shaft 13 to rotate the rotary shaft 13 around the axis to adjust the rotation direction of the roller 14. The handle 15 is provided.

  The height of the upper end of the roller 14 is lower than the height of the elastic member 9 when the rod 11 of the hydraulic jack 10 is housed, but is higher than the height of the elastic member 9 when the rod 11 is projected. It is designed to be.

  That is, the rod 4 of the cylinder 3 for raising and lowering the pipe is protruded so that the new pipe P1 is floated in the existing pipe P2, and the inner surface of the new pipe P1 to be conveyed is accommodated by storing or protruding the rod 11 of the hydraulic jack 10. It is possible to appropriately select whether the elastic member 9 is supported by the elastic member 9 or the roller 14.

  Specifically, when the new pipe P1 is transported by the carriage 1, as shown in FIG. 5, the new pipe P1 is supported by the elastic member 9, and the new pipe P1 being transported is displaced by vibration. Do not. On the other hand, when positioning to connect the new pipes P1 or when rolling occurs in the carriage 1 and the posture of the carriage 1 or the new pipe P1 needs to be corrected, it is shown in FIG. In this way, the new pipe P1 is supported by the roller 14, and the new pipe P1 is moved in the pipe axis direction and rotated in the pipe axis circumferential direction to adjust the position.

  As described above, since the position of the new pipe P1 is adjusted by the roller 14 that supports the new pipe P1, the new pipe P1 can be used even if the cross-sectional shape of the new pipe P1 is a special shape such as a horseshoe shape. Connection work between P1 can be easily performed.

  In addition, since the rod 4 and the beam 7 of the cylinder 3 for raising and lowering the pipe are connected via the hinge 8, an inclination can be provided between the carriage frame 2 and the beam 7. For this reason, when the new pipes P1 are connected to each other, even if the traveling wheel 16b and the lifting / lowering wheels 18b are mounted on the new pipe P1 to be connected and the carriage 1 itself is inclined, the two new pipes P1 are straightened. It can be set as the state where it lined up on a line, and connection of newly established pipes P1 can be performed easily.

  The connecting portion of the hinge 8 is connected by a long hole 17 that is long in the tube axis direction. Therefore, even when the cart 1 is tilted, the shaft of the hinge 8 slides in the long hole 17 and can cope with the tilt.

  Before and after the carriage frame 2, a traveling wheel 16 (16 a, 16 b) for moving the carriage 1 forward and backward in the existing pipe P <b> 2 and a state in which the traveling wheel 16 is lifted by lifting the carriage 1. Elevating wheels 18 (18a, 18b) are provided.

  The traveling wheels 16 are made of rubber tires, and there is little risk of damaging the inner surface of the new pipe P1 when riding on the new pipe P1.

  Further, a wheel elevating cylinder 19 (19a, 19b) is interposed between the elevating wheel 18 (18a, 18b) and the carriage frame 2, and the wheel elevating cylinder 19 (19a, 19b) is provided. The rod 20 (20a, 20b) is raised and lowered to raise and lower the lifting wheel 18.

  A connecting portion 21 is formed at the rear end of the carriage frame 2, and a power vehicle (not shown) is connected to the connecting portion 21 so that the carriage 1 can be moved back and forth. An operator W can be put on the carriage frame 2, and the operator W operates the hydraulic jack 10, the pipe lifting / lowering cylinder 3, etc. on the carriage 1 to align the newly installed pipe P 1. It can be performed.

  Next, the conveyance work of the new pipe P1 using this cart 1 is demonstrated using Fig.6 (a)-(i). A shaft H that leads to the ground is formed at the end of the existing tube P2 where the new tube P1 is provided. First, the new tube P1 is lowered from the shaft H one by one by a crane. A carriage 1 is waiting on the back side of the existing pipe P2 where the new pipe P1 is provided, and the carriage 1 is moved toward the new pipe P1 lowered to the shaft H (see FIG. 2A).

  When the carriage 1 reaches the new pipe P1, the rod 20a of the wheel lifting cylinder 19a on the side close to the new pipe P1 is extended, and the lifting wheel 18a is grounded to the inner surface of the existing pipe P2 so that the traveling wheel 16a is floated. Then, the traveling wheel 16a is put into the pipe of the new pipe P1 (see FIG. 5B). Then, a predetermined amount of the cylinder rod 20a of the wheel elevating cylinder 19a is stored, the elevating wheel 18a is also put into the pipe, and the carriage 1 is put into the new pipe P1 (see FIG. 5C).

  When the carriage 1 is caused to travel toward the other end of the new pipe P1 and the traveling wheel 16a comes out from the other end (see FIG. 4D), the rod 20a of the wheel lifting cylinder 19a is completely stored. Then, the traveling wheel 16a is grounded to the inner surface of the existing pipe P2 (see FIG. 5E). In this way, when the traveling wheels 16a and 16b before and after the carriage 1 protrude from both ends of the new pipe P1, the rod 4 of the pipe lifting cylinder 3 protrudes to raise the beam column 5 and is provided on the upper surface side of the beam 7. The new pipe P <b> 1 is lifted by the elastic member 9. At this time, the rod 11 of the hydraulic jack 10 is kept in the housed state. If it does so, the roller 14 provided in the upper end of the rod 11 and the new pipe P1 will space apart, and will be in the state which supported the new pipe P1 only with the elastic member 9 (refer the same figure (f)). In this state, the new pipe P1 supported by the carriage 1 is transported to the vicinity of the new pipe P1 that has already been connected.

  When the new pipe P1 is conveyed to a predetermined position, the rod 11 of the hydraulic jack 10 is protruded upward, the new pipe P1 is supported only by the roller 14 at the upper end of the rod 11, and the elastic member 9 and the new pipe P1 are separated. (See (g) in the figure). Then, by operating the handle 15 provided on the rod 11 and appropriately changing the rotation direction of the roller 14, the newly installed pipe P1 can be moved in the pipe axis direction or rotated in the pipe axis circumferential direction. it can. Thereby, prior to the connection between the new pipes P1, the new pipes P1 and P1 can be easily and simply aligned.

  Further, while conveying the new pipe P1, the elevating wheel 18b on the front end side in the traveling direction is inserted into the new pipe P1 on the connected side, the wheel elevating cylinder 19b is operated to project the rod 20b, and the elevating wheel 18b. Is grounded in the new pipe P1 and the traveling wheel 16b is floated. Then, the traveling wheel 16b can be easily ridden on the new pipe P1 connected to the existing pipe P2. Then, the new pipes P1 are connected to each other by individually operating the protruding amounts of the cylinders 3 and 3 for raising and lowering the pipes, that is, the rising amounts of the beam support columns 5 so that both the new pipes P1 and P1 are aligned. (See (h) in the figure).

  When this connection is completed, the carriage 1 is moved to the shaft H side in order to transport the new tube P1 newly lowered from the shaft H into the existing tube P2 (see (i) in the figure). Hereinafter, each process of Fig.6 (a)-(i) is repeated until the connection of all the new installation pipes P1 is completed.

  In the above series of explanations, when the new pipe P1 is lowered to the shaft H, the carriage 1 is placed on the back side of the existing pipe P2 (the right side in FIG. 6 (a)). If it is possible to secure a space for waiting the carriage 1 together with a space for lowering the pipe P1, the carriage 1 may be kept waiting on the front side of the existing pipe P2 (the left end in FIG. 6A). good.

  When the new pipe P1 is transported by the carriage 1, the carriage 1 rolls along the inner surface of the existing pipe P2, and the posture of the new pipe P1 transported with the carriage 1 may become unstable. In this case, as shown in FIG. 7, the newly installed pipe P1 supported by the roller 14 is slightly rotated by its own weight, and its height is slightly lowered (see symbol h in the figure). Along with that, the position of the center of gravity of the new pipe P1 is also slightly lowered, the stability of the carriage 1 and the new pipe P1 is restored, and the safety of the worker is ensured.

Another embodiment according to the present invention is shown in FIGS.
Unlike the one shown in FIG. 1 and the like, this carriage 1 does not have lifting wheels for floating the traveling wheels 16a on the side close to the shaft H. For this reason, it is made to ride directly on the new pipe P1 lowered in the shaft H with the traveling wheels 16a. If the diameter of the traveling wheel 16a to be climbed is sufficiently large compared to the size of the step between the newly installed pipe P1 and the existing pipe P2, even if the lifting wheel for floating the traveling wheel 16a is not used, It is easy to get on.

Still another embodiment according to the present invention is shown in FIG.
Similar to the carriage 1 shown in FIG. 1 and the like, the carriage frame 2 of the carriage 1 is provided with upright two cylinders 3 and 3 for raising and lowering the hydraulic pipes. And the beam 7 are connected via a hinge 8. Further, a total of six omnidirectional casters 22, two in the circumferential direction and three in the tube axis direction, are provided on the upper surface side of the beam 7.

  As this omnidirectional caster 22, an omni wheel (trade name, manufactured by INTERROLL) is adopted. The number of the omni wheels 22 can be changed as appropriate according to the weight of the newly installed pipe P1, and when the newly installed pipe P1 is heavy, for example, two sets in the circumferential direction and 4 sets in the pipe axis direction, for a total of 8 sets. It is also possible to reduce the load applied to each omni wheel 22 by providing one piece.

  When the rod raising / lowering cylinder 3 is operated to project the rod 4 upward, as shown in FIG. 10, the new pipe P1 is connected to the existing pipe P2 by the omni wheel 22 contacting the inner surface of the new pipe P1. It floats from the inner surface.

  As shown in FIG. 11, the omni wheel 22 has a fixed rotation shaft 24 that rotates the main roller 23 in the traveling direction of the carriage frame 2, and the main roller 23 has an auxiliary rotation shaft 25 along the rotation direction. It is comprised from the some sub-roller 26 which has. Since the main roller 23 and the child roller 26 can rotate independently of each other, the carriage 1 can be moved in the loading direction of the new pipe P1, and the new pipe to be connected can be connected by rotating in the circumferential direction of the pipe axis. Position alignment between P1 can also be performed.

  Further, when the carriage 1 is tilted along the inner surface in the existing pipe P2 during this carrying-in operation (when rolling occurs), the child roller 26 is slightly lifted by its own weight as shown in FIG. The center of gravity is slightly lowered by this rotation. Due to the lowering of the position of the center of gravity, the stability of the carriage 1 and the new pipe P1 is restored, and the safety of the operator is ensured.

  The omnidirectional caster 22 is not limited to the omni wheel, and for example, a ball caster can be adopted. This is because this ball caster also has the same function as the omni wheel in that it can roll in any direction. In addition, by providing a known stopper mechanism for the omnidirectional caster 22 so that the omnidirectional caster 22 does not roll during the conveyance, the stability during the conveyance can be improved.

DESCRIPTION OF SYMBOLS 1 Pipe carriage 2 Carriage frame 3 Pipe raising / lowering cylinder 4 (Pipe raising / lowering cylinder) Rod 5 Beam support 6 Support member 7 Beam 8 Hinge 9 Elastic member 10 Hydraulic jack 11 (Hydraulic jack) Rod 12 Bush (Bearing) )
13 Rotating shaft 14 Roller 15 Handle 16 (16a, 16b) Traveling wheel 17 Long hole 18 (18a, 18b) Lifting wheel 19 (19a, 19b) Wheel lifting cylinder 20 (20a, 20b) Rod (for wheel lifting cylinder) 21 connecting part 22 omnidirectional caster (omni wheel)
23 Main roller 24 Fixed rotating shaft 25 Auxiliary rotating shaft 26 Child roller

Claims (6)

A plurality of elastic members (3) are provided upright on the carriage frame (2), the inner surface of the new pipe (P1) is supported on the upper end side of the elastic member (3), and the new pipe (P1) is connected to the existing pipe. In the pipe transport carriage that is configured to transport the inside of the existing pipe (P2) while being floated from the inner surface of (P2),
A beam (7) for connecting the upper ends of the respective elastic members (3) is provided, an elastic member (9) is provided on the upper surface side of the beam (7), and the beam (7) is projected and stored upward. A plurality of rotation shafts (13) that are free to rotate around an axis, and a roller (14) is provided at the upper end of each rotation shaft (13),
When the new pipe (P1) is transported, the rotary shaft (13) is accommodated so that the upper end of the roller (14) does not protrude from the upper end of the elastic member (9), and is transported. ) Is received by the elastic member (9),
In the alignment for connecting the new pipes (P1), the rotating shaft (13) protrudes upward, and the upper end of the roller (14) protrudes from the upper end of the elastic member (9) The load of the new pipe is received by the roller, and the rotating shaft (13) is rotated around the axis to adjust the rotation direction of the roller to the direction in which the new pipe is to be moved, thereby performing the positioning. A carriage for transporting pipes characterized by that.   The rotating shaft (13) is supported by a bearing (12) fixed to the beam (7), and a handle (15) is provided on the rotating shaft (13). By operating the handle, the rotating shaft (13) is provided. The carriage for carriage according to claim 1, wherein the rotation angle of the pipe is adjusted. A plurality of elastic members (3) are provided upright on the carriage frame (2), the inner surface of the new pipe (P1) is supported on the upper end side of the elastic member (3), and the new pipe (P1) is connected to the existing pipe. In the pipe transport carriage that is configured to transport the inside of the existing pipe (P2) while being floated from the inner surface of (P2),
While providing the beam (7) which connects the upper ends of each said expansion-contraction member (3), it can be freely rotated to this beam (7) in both the advancing direction of the said trolley | bogie frame (2), and its perpendicular direction. The omnidirectional caster (22) is provided, and the new pipe (P1) supported by the omnidirectional caster (22) can be moved in the pipe axis direction and rotated in the circumferential direction of the pipe axis. Carriage for transporting pipes. The omnidirectional caster (22) has a main roller (23) that rotates about a fixed rotation axis (24), and a plurality of rotations about an auxiliary rotation axis (25) along the rotation direction of the main roller (23). A child roller (26),
The new pipe (P1) to be conveyed is moved in the pipe axis direction by the rotation of the main roller (23), while being rotated in the pipe axis circumferential direction by the rotation of the child roller (26). The pipe conveyance carriage according to claim 3, wherein the carriage is a carriage.   The beam (7) and the telescopic member (3) are connected via a hinge (8), and the angle between the carriage frame (2) and the beam (7) is changed by changing the hinge angle. The carriage for carriage according to any one of claims 1 to 4, wherein the carriage can be freely adjusted.   A pipe transfer method, wherein the pipe (P1) is transferred using the pipe transfer carriage according to any one of claims 1 to 5.

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