JP3652662B2 - Tube carrier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe transport carriage used when laying pipes in a tunnel.
[0002]
[Prior art]
Conventionally, when a pipe such as a water supply pipe or a sewer pipe is installed in a tunnel, a pipe carriage is used to transport the pipe into the tunnel. There are straight pipes and bent pipes (vent pipes) as the pipes transported by such a pipe transport carriage. Moreover, even if it is a straight pipe, there exist a thing with directionality in the circumferential direction at the time of conveyance, a thing with no directionality, etc.
[0003]
There is no particular problem when transporting straight pipes with no directionality, but those with directionality need to be loaded with a constant circumferential orientation when they are loaded on a transport carriage. In addition, when a curved pipe is loaded and transported, the curved pipe may interfere with the inner wall of the tunnel and be damaged, so great care must be taken.
[0004]
Conventionally, a centering mechanism has been provided in which the tube receiving base of the tube transport carriage can be moved up and down, left and right, but since there is no mechanism for rotating the tube, rotation after loading the tube is not possible. could not. For this reason, when conveying a directional straight pipe, the pipe is suspended while the circumferential posture is set to a predetermined posture.
[0005]
Also, to avoid interference between the curved pipe and the inner wall of the tunnel, the curved pipe is divided into a curved pipe part and a straight pipe part, and both are transported in a temporarily coupled state, and in the part where interference may occur, the temporary coupling is performed. A technique for changing the angle of the portion so as to be larger than the original coupling angle and passing the portion is also known (see Japanese Patent Application Laid-Open No. 2001-227047).
[0006]
[Problems to be solved by the invention]
However, when loading a directional tube on a tube conveyance carriage, suspending the tube while determining the posture in the circumferential direction has a problem of hindering loading workability. In addition, the bent pipe and the straight pipe part that are temporarily joined are expensive to manufacture, and work such as changing the angle of the curved part during transportation, joining work during installation, etc. There is a bad problem.
[0007]
In view of this, the present invention improves the pipe transport carriage so that a directional pipe can be freely rotated and changed to a predetermined posture, and a curved pipe can also be transported without interfering with the inner wall of the tunnel. The challenge is to make it.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the invention related to the pipe transport carriage includes a loading carriage and an operation carriage connected thereto, and pipe receiving stands are provided at two places on the front and rear of the loading carriage. In the pipe transport carriage in which the base is remotely operated from the operation carriage, a pipe receiving roller having a longitudinal rotation shaft is provided at both left and right end portions of each of the pipe receiving stands, and one of the pipe receiving rollers is provided. A configuration is adopted in which driving force is transmitted from the operation carriage by remote control means.
[0009]
When a straight pipe having directionality is transported by the pipe transport carriage having the above-described configuration, the pipe receiving roller is rotated by a predetermined angle by a remote operation from the operation carriage after being loaded, and is set to a predetermined posture. Further, when the curved pipe is conveyed, when it is likely to interfere with the inner wall of the curved portion, the pipe receiving roller is rotated by remote operation, and the curved pipe is rotated by a certain angle. Since the bent tube has a smaller bending angle in plan view due to the rotation, it can pass without interfering with the inner wall of the tunnel.
[0010]
In addition, a rotation operation rod as the remote operation means is connected to a rotation shaft of at least one tube reception roller on either the left or right of the front and rear tube reception bases, and the rotation operation rod is connected to the manual operation on the operation carriage. By adopting a configuration connected to the handle, a remote control mechanism for rotating the tube can be realized with a simple configuration.
[0011]
Further, in addition to the above-described configuration, a configuration in which the tube receiving roller is provided via a centering mechanism so as to be movable in the vertical direction and the horizontal direction with respect to the vehicle body of the loading cart can be adopted. Further, as the above-mentioned centering mechanism, the left and right alignment portions where the tube support is slidably mounted in the width direction with respect to the vehicle body, and the tube support rollers are swung up and down at both left and right ends of the tube support. It is possible to adopt a configuration including a vertically aligning portion that is movably attached.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the tube conveyance carriage according to the embodiment includes a loading carriage 1 and an operation carriage 3 connected to a rear end thereof by a connecting rod 2, and these are arranged on two parallel rails 4, 4. The operation carriage 3 is connected to the starter car 5 and used for use, and is pushed forward in the tunnel 6 by the starter car 5 (see the white arrow).
[0013]
As shown in FIG. 2, the loading cart 1 includes a front cart 7 and a rear cart 9 coupled by a frame 8. Each of the front carriage 7 and the rear carriage 9 has a pair of front and rear wheels 11, 11, thereby traveling on the rails 4, 4. Since the front carriage 7 and the rear carriage 9 have the same structure, the rear carriage 9 will be described below. The front carriage 7 is given the same reference numeral, and the description thereof is omitted.
[0014]
As shown in FIGS. 3 and 4, a slide support 13 is provided on the upper surface of the vehicle body 12 of the rear carriage 9. The slide support 13 has two guide holes 14 in the width direction, and guide pieces 15 provided in the vehicle body 12 are fitted into the guide holes 14. Further, a hydraulic cylinder 16 is attached along one side surface of the slide support base 13 at the center of the vehicle body 12, and its piston rod 17 is connected to the side surface of the slide support base 13. As a result, the slide support 13 is slidable in the vehicle width direction. A left and right alignment portion of the center alignment mechanism is configured by the slide support 13 that is slidably supported in the vehicle width direction.
[0015]
On the upper surface of the slide support base 13, a pipe support base 18 protruding in the left-right direction is provided. The tube receiving base 18 is a frame-shaped member constituted by two tube receiving members 18a and 18b arranged at the front and rear, and a connecting member 19 for connecting the front and rear tube receiving members 18a and 18b at both left and right ends thereof. .
[0016]
A pair of front and rear brackets 21, 21 are swingably attached to the connecting member 19, and the shaft support member 22 is also fixed to the front end of the brackets 21, 21. Pipe receiving rollers 24 and 24 are rotatably attached to both front and rear end portions of the shaft support member 22 via bearings 23, respectively. Also, the piston rods 26 of the hydraulic cylinder 25 are swingably attached to the left and right side portions of the slide support 13 by pins 27, and the hydraulic cylinder 25 is connected to the lower end of the lift lever 29 by a pin 28 (see FIG. 4). Is pivotably connected to the portion. The elevating lever 29 has a fulcrum that is rotatably supported by the connecting member 19, and an upper end that is rotatably coupled to the shaft support member 22.
[0017]
As described above, the vertical alignment portion of the centering mechanism is configured by the mechanism in which the tube receiving roller 24 on the tube receiving base 18 is supported by the elevating lever 29 so as to be movable up and down.
[0018]
As shown in FIGS. 3 and 7, the distal end of the rotation operation rod 32 is connected to the rotation shaft of the tube receiving roller 24 on the right rear side toward the front of the rear carriage 9 via the universal joint 31. The rotary operation rod 32 is provided with an expansion joint 33 (see FIG. 2) at its intermediate portion, and the rear end is connected to a gear box 34 (see FIG. 8) provided in the operation carriage 3 via a universal joint 35. A handle 36 is attached to the upper portion of the gear box 34. The operation handle 36 is connected to a mechanism for rotating the tube receiving roller 24 by rotating the operation handle 36 to constitute a remote operation mechanism. A total of eight pipe receiving rollers 24 are provided in the front, rear, left, and right, but the driving force is transmitted to only one pipe receiving roller 24 connected to the rotation operation rod 32, and the others are all freely rotated. However, the tube receiving roller 24 of the front carriage 7 opposed to the tube receiving roller 24 connected to the rotating operation rod 32 may be connected by the rotating shaft 30 (see FIG. 2).
[0019]
A plurality of manual hydraulic pumps 37 for operation are installed on the operation carriage 3.
[0020]
The tube conveyance carriage of the embodiment is as described above. In the case of the drawing, the case where the straight pipe 38 having directionality is loaded and conveyed on the loading carriage 1 is shown. As shown in FIG. 9, the straight pipe 38 has an inner pipe 42 with a small diameter placed on a pillow member 41 fixed on the inner surface by bolts 39, 39, and is fastened and fixed to the pillow member 41 by a wire 43. A belt-like FRP plate 45 is tightly bound to the outer periphery with a spacing piece 44 interposed. The inner pipe 42 is in an eccentric position with respect to the center of the straight pipe 38, and the posture is such that the pair of left and right bolts 39, 39 are equidistant a, a on the left and right with respect to the lowest end of the straight pipe 38. Therefore, it is necessary to maintain the posture even when loading and transporting, so that the posture in the circumferential direction is directional.
[0021]
However, when the straight pipe 38 is loaded on the loading carriage 1, it is loaded on the pipe receiving rollers 24 and 24 of the front and rear pipe receiving stands 18 and 18 without taking into consideration the particular attitude, and the operation carriage 3 is loaded after loading. When the upper worker operates the handle 36 to rotate the tube receiving roller 24 for transmitting the driving force, torque is transmitted to the straight tube 38 and rotates. The pipe receiving roller 24 other than the above rotates freely according to the rotation of the straight pipe 38. When the straight pipe 38 assumes a predetermined posture, the operation of the handle 36 is stopped, and the conveyance is performed while maintaining the posture. However, the adjustment of the posture of the straight pipe 38 may be performed immediately before joining the pipes.
[0022]
As described above, when the tube receiving roller 24 of the rear carriage 9 and the tube receiving roller 24 of the front carriage 7 are connected by the rotary shaft 30, the straight tube 38 can be easily rotated.
[0023]
The inner pipe 42 is separated from the straight pipe 38, and the straight pipe 38 is first carried in a predetermined posture and installed in the tunnel 6, and then the inner pipe 42 is carried into the straight pipe 38. In some cases, it is fixed.
[0024]
When alignment with the existing pipe is required, the hydraulic cylinder 16 of the loading carriage 1 is driven from above the operation carriage 3, and the slide support base 13 is slid left or right to align it in the left-right direction. I do. Similarly, the vertical alignment is performed by driving the left and right hydraulic cylinders 25, 25. 5 and 6 and FIGS. 7A and 7B show a case where the height H of the tube receiving roller 24 is changed to H ′ by the above-described alignment. As described above, the position of the tube receiving roller 24 is changed by the alignment in the left and right direction and the up and down direction. To do.
[0025]
Next, the case where the curved pipe 46 is loaded and conveyed will be described. FIG. 10 shows a state in which the curved pipe 46 is loaded on the loading cart 1. As shown in FIG. 11 (a), the intersection of the center lines a and b on both sides intersecting at a certain angle of the curved pipe 46 and the surface including the inner top portion and the outer top portion of the curved portion are referred to as a bending boundary surface c. Then, the portion supported by each tube receiving roller 24 is installed at a position that is symmetrical with an equal distance d in the front-rear direction with respect to the bending boundary surface c. When installed in this way, the trajectories e and f when the curved pipe rotates on each pipe receiving roller 24 have an inclination angle with respect to the center lines a and b, respectively, and therefore when the cylindrical body is cut obliquely Similarly, it becomes elliptical (see FIG. 11B). Therefore, it can be said that each of the tube receiving rollers 24 and 24 is equivalent to loading the virtual elliptical tube 47 including the elliptical trajectories e and f.
[0026]
When the bending of the curved pipe 46 is gentle, the virtual elliptical pipe 47 described above has a circular arc L of the virtual cylinder 48 having the center 0, as shown in FIG. Almost overlaps with the lap. For this reason, the virtual elliptical tube 47 can rotate around the point O within a limited range of a constant angle δ.
[0027]
Since the bent tube 46 loaded on the loading carriage 1 is rotatable as described above, as shown in FIGS. 12 (a) and 12 (b), the bent tube having the bending angle δ1 in the straight portion or the curved portion of the tunnel 6 is used. When there is a possibility that 46 may interfere with the inner wall of the tunnel 6, if this is slightly rotated, the bending angle δ1 of the curved tube 46 apparently changes to an angle δ2 smaller than this. Further, the apparent maximum width W also changes to a smaller width W ′. Thereby, it is possible to prevent the curved pipe 46 from interfering with the inner wall of the tunnel 6.
[0028]
【The invention's effect】
As described above, according to the present invention, when a tube is loaded on a loading carriage and transported through the tunnel, a direct pipe having a directivity is rotated by a remote operation means from the operation carriage to obtain a predetermined posture. There is the convenience of being able to freely change the rotation and conveying, and by rotating the curved pipe, interference with the inner wall of the tunnel can be prevented.
[Brief description of the drawings]
1 is a cross-sectional view of a transport state of an embodiment. FIG. 2 is a plan view of the embodiment. FIG. 3 is a plan view of a rear carriage. FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 is a cross-sectional view taken along line BB in FIG. 3. FIG. 6 is a cross-sectional view after the change from the state in FIG. 5. FIG. 7A is a front view of the rear carriage of the embodiment. [FIG. 8] Partially enlarged front view of the operation carriage same as above [FIG. 9] Cross-sectional view when transporting straight pipe [FIG. 10] Partial plan view when transporting curved pipe [FIG. 11] (A) Plan view of curved pipe (b) (c) Schematic diagram of curved pipe [Fig. 12] (a) (b) Schematic diagram during conveyance of curved pipe [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Loading trolley 2 Connecting rod 3 Operation trolley 4 Rail 5 Starting car 6 Tunnel 7 Front trolley 8 Frame 9 Rear trolley 11 Wheel 12 Car body 13 Slide support base 14 Guide hole 15 Guide piece 16 Hydraulic cylinder 17 Piston rod 18 Tube support 18a 18b Pipe receiving member 19 Connecting member 21 Bracket 22 Shaft support member 23 Bearing 24 Pipe receiving roller 25 Hydraulic cylinder 26 Piston rod 27 Pin 28 Pin 29 Lifting lever 30 Rotating shaft 31 Universal joint 32 Rotating operation rod 33 Expansion joint 34 Gear box 35 Universal joint 36 Handle 37 Manual hydraulic pump 38 Straight pipe 39 Bolt 41 Pillow member 42 Inner pipe 43 Wire 44 Spacing piece 45 FRP plate 46 Curved pipe 47 Virtual elliptical pipe 48 Virtual cylinder

Claims (1)

Consists loading truck 1 and this linked operated carriage 3 which, the pipe cradle 18 around two places on the loading carriage 1 is provided, the tube cradle 18 so as to remotely operated from the operating carriage 3 In the pipe transport cart,
The tube receiving roller 24 having front and rear direction of the rotary shaft 30 to the left and right end portions of the each tube cradle 18 is provided, and the vertical direction the pipe receiving roller 24 with respect to the body 12 of the loading carriage 1, in the left-right direction provided through the centering mechanism so that the moving is possible, the above centering mechanism, the lateral alignment portion mounted slidably in the width direction with respect to the vehicle body 12 the pipe cradle 18, the tube cradle in the right and left end portions of the 18 consists of a said pipe receiving vertical alignment unit roller 24 mounted swingably in the vertical direction, the driving force by the one of the pipe receiving remote control means from the operation carriage 1 to the roller 24 upon transmitting the rotating shaft 30 of at least one tube receiving roller 24 in either the left and right of the front and rear tube cradle 18, one end of the rotational operation rod 32 serving as the remote operation means The other end of the rotary operation rod 32 is connected to a gear box 34 on the operation carriage 3 via a universal joint 35, and an expansion joint 33 is interposed between the rotation operation rods 32. And a manual handle 36 attached to the gear box 34, and the rotary operation rod 32 follows the position change of the pipe receiving roller 24 .

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