JPH06247208A - Pipe transport dolly - Google Patents

Abstract

PURPOSE:To enable a pipe, which is transported by a dolly toward an existing line, to be located in the circumferential direction immediately before joining it with the line. CONSTITUTION:A pipe 14 laid in horizontal direction is supported in such a way as not rotatably by a pipe support 26 furnished on a dolly and transported toward the place of joining. In lieu of the pipe support 26, in this place, the pipe 14 is supported by rotary rollers 36 so that it can rotate round the axis, and thereby the pipe 4 immediately before joining is positioned in the circumferencial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe carrier, and more particularly to a pipe carrier for carrying a pipe laid inside an existing structure such as a tunnel or a shield inside the structure.

[0002]

2. Description of the Related Art When laying a horizontal pipe line inside an existing structure, that is, when laying a sewer pipe having a circular cross section in a shield, for example, a plurality of pipes are sequentially placed inside the shield. Need to be joined. For that purpose, each pipe must be suspended from a vertical shaft or the like in a shield by a crane and transported to the joining place inside the shield, and many pipe transport carriages for that purpose have been conventionally proposed.

When joining a new pipe to an existing pipe,
Since this new pipe must be aligned with the existing pipe, the conventional pipe carrier truck of this type is generally provided with a centering mechanism in the vertical and horizontal directions in the cross section of the pipe.

By the way, when the cross-section of the pipe is not a perfect circle, or when it is necessary to align accessories previously attached to the pipes to the pipes at predetermined positions after the joining is completed, It is not enough to position the top, bottom, left and right, but it is necessary to position them accurately in the circumferential direction before joining.

[0005]

However, in the conventional pipe carrier truck, the pipes can be centered but cannot be positioned in the circumferential direction. Therefore, accurate positioning must be performed when the pipes are hung down on a vertical shaft or the like. However, even in that case, there is a problem that some deviation easily occurs due to vibration during transportation.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above problems and enable the pipe to be circumferentially positioned immediately before joining.

[0007]

In order to achieve the above object, the present invention provides a traveling carriage, a means provided on the traveling carriage for supporting a horizontal pipe in a non-rotatable manner around an axis, and the traveling carriage. And configured to function alternatively as a means for non-rotatably supporting the tube about its axis,
Means for rotatably supporting the horizontal tube about its axis.

[0008]

In such a structure, when the pipe is transported to the joining position, the pipe is stably supported by the non-rotatably supporting means. At the joining location, the tubes to be joined are positioned in the circumferential direction by supporting the tubes by means of rotatably supporting them and rotating them around the axis.

[0009]

EXAMPLE In FIG. 7, 10 is an existing structure such as a tunnel or a shield, in which a pipeline 12 is laid. This pipe line 12 is configured by connecting a plurality of pipes 14 in sequence, and when the pipe carrier truck 16 according to the present invention travels inside the structure 10, the new pipe 14 supported by the truck 16 is joined. Transported to place.

As shown in FIGS. 1 to 5, the carriage 16 is composed of a rectangular frame 18, and the wheels 20 installed on the frame 18 are driven by a driving device (not shown), The dolly 16 can travel on a rail 22 laid inside the structure 10 as shown in FIG.

The frame 18 is provided with a centering device 24 for vertically centering the pipe 14. In this centering device 24, a pair of block-shaped tube supports 26 are arranged at the front and rear of the frame 18 at a distance in the width direction of the frame 18. Each tube support 26
Is connected to one end of a bell crank 30 which is swingable around an axis 28 in the width direction of the frame 18, and can be vertically moved by swinging the bell crank 30. To the other end of the bell crank 30, the telescopic end of the cylinder device 32, whose base end is connected to the frame, is connected.

When the cylinder device 32 operates in the extension direction,
As shown in FIGS. 2 and 3, the tube support 26 projects above the frame 18 and supports the bottom of the tube 14 in the horizontal direction, and supports the tube 14 so as not to rotate about the axis. On the contrary, when the cylinder device 32 moves in the contraction direction, the pipe support 26 enters the inside of the frame 18 as shown in FIGS. 4 and 5, and can no longer support the pipe 14.

Further, the frame 18 is provided with a rotation support device 34 for supporting the tube 14 rotatably around its axis. In this rotation support device 34, a pair of rotating rollers 36 are arranged at the front end and the rear end of the frame 18 at a distance in the width direction of the frame 18. Each rotating roller 36 is rotatable about a longitudinal axis 42 of the frame 18 at one end of a bell crank 40 which is swingable about a longitudinal axis 38 of the frame 18.

Cylinder devices 44 are installed between the other ends of the pair of bell cranks 40, respectively. When the cylinder device 44 operates in the extension direction, the rotating roller 36 projects above the frame 18 to support the bottom portion of the tube 14 and rotatably support the tube 14, as shown in FIGS. 4 and 5. On the contrary, when the cylinder device 44 moves in the contracting direction, the rotating roller 36 enters the inside of the frame 18 and can no longer support the tube 14 as shown in FIGS.

The rotating roller 36 may be configured to rotate the tube 14 by rotating itself by an appropriate driving device, or may be rotatable around an axis 42 so that the tube 14 can be rotated. It may be configured to follow when rotating around the center. In the latter case, the tube 14 is rotated about its axis by human power or other means.

Further, as shown in FIGS.
Both the cylinder devices 32 and 44 are controlled so that only one of the rotation roller 36 and the rotation roller 36 selectively protrudes above the frame 18, and neither of them simultaneously protrudes.

With such a structure, when a new pipe 14 is joined to the existing pipe line 12 laid inside the structure 10, the pipe support of the centering device 24 is performed as shown in FIGS. 2 and 3. The body 26 stably supports the tube 14 in a state in which it cannot rotate in the horizontal direction. Then, by moving the truck 16 along the rail 22 in the structure 10, the pipe 14 is transported to a predetermined joining place.

If this transported pipe 14 and existing pipeline 12
If they are aligned in the circumferential direction, the pipe support 26
The pipe 14 is centered with respect to the existing pipe line 12 by appropriately moving the pipe 14 and moving the pipe 14 in the left-right direction. So, by further moving the truck 16 forward,
This pipe 14 is joined to the existing pipe line 12.

When the pipe 14 supported by the pipe support 26 is conveyed to the joining position by the traveling of the carriage 19, when the position of the pipe 14 in the circumferential direction is deviated from the pipe line 12, the pipe support The tube 26 is supported by the rotating roller 36 instead of the tube support 26 by lowering the tube 26 to retract into the body from the frame 18 and raising the rotating roller 36 to project from the frame 18. The tube 14 is then rotated about its axis to position it in its circumferential direction. After that, the support of the centering device 24 is again switched to the support by the pipe support 26, and the pipe 14 is centered and then joined.

In the above, the rotary roller 36
While rotatably supporting 14 and non-rotatably supporting the tube 14 by the tube support 26, the rotating roller 36 is provided with a rotation lock mechanism so that the tube 14 can be supported by the rotating roller 36. It can be supported so that it cannot rotate. In this way, the tube 14 can be supported by the rotating roller 36 alone in either a rotatable or non-rotatable state, and the tube support 26 can be eliminated. In this case, by adjusting the amount of protrusion of the rotary roller 36 from the frame 18,
The tube 14 can be centered.

[0021]

As described above, according to the present invention, the means for non-rotatably supporting the horizontal tube about the axis and the means for non-rotatably supporting the tube function alternately. Since the means for supporting the horizontal pipe rotatably around the axis is installed in the traveling carriage, the pipe immediately before joining after being transported to the joining place can be positioned in the circumferential direction, The pipes can be joined efficiently in the positioned state, and the joining workability can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a pipe carrier according to an embodiment of the present invention.

2 is a front view of the carrier of FIG. 1 when the tube support is in operation.

FIG. 3 is a side view of the carrier when the pipe support is in an operating state.

FIG. 4 is a front view of the carrier when the rotating roller is in an operating state instead of the pipe support.

FIG. 5 is a side view of the carrier truck when the rotary roller is in an operating state.

FIG. 6 is a side view showing a state in which a pipe is rotatably supported in an existing structure by the transport vehicle.

FIG. 7 is a diagram showing a state in which pipes are being transported in an existing structure by the transport vehicle.

[Explanation of symbols]

 18 Frame 24 Centering device 26 Pipe support 34 Rotation support device 36 Rotation roller

Claims (1)

[Claims] 1. A traveling trolley, means provided on the traveling trolley for supporting a pipe in a horizontal direction in a non-rotatable manner around the axis, and a traveling trolley provided in the traveling trolley so as to prevent the pipe from rotating around the axle. And a means for supporting the horizontal tube rotatably around an axis, the tube carrier being configured to function as an alternative.