JPH0533599A - Insertion type pipe truck - Google Patents

Abstract

PURPOSE:To prevent the damage in the inside of a pipe body and to reduce a construction period by bearing the front of a truck in the case it is inserted on an auxiliary wheel device against the inside of a transferring objective pipe body, contracting a truss device to release a holding state, and pulling out the truck. CONSTITUTION:When a truck 1 is inserted into a transferring objective pipe body 2, an auxiliary wheel 4 is lowered to store the front wheel 8 in an evacuating position, and the truck 1 is borne on the front wheel 8 to insert. After that, at that point when the front of the truck 1 is drawn out of the transferring pipe body 2, the front wheel 8 is projected to a position coming into contact with a transferring course face 7, the front of the truck 1 is borne on the front wheel 8, and the auxiliary wheel 4 is stored. After that, a truss 13 is extended to lift up the transferring objective pipe body 2 from the transferring course face 7 and is transferred to the existing pipe body 17, the auxiliary wheel 4 is lowered, the front wheel 8 is stored in the evacuating position, and the truck 1 is pushed forward to butt the existing pipe body 17 to the transferring objective pipe body 2. The holding state of the truss 13 is released, the transferring objective pipe body 2 is constrained to pull out the truck 1, and the transferring objective pipe body 2 is taken into the existing pipe 17 to join a pipe joint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insertion type pipe carriage for carrying a pipe into an existing pipe or a tunnel.

[0002]

2. Description of the Related Art Conventionally, there is a basket-type carriage as a carriage for carrying a pipe into an existing pipe or a tunnel. This is to insert the carriage into the pipe to be conveyed, to support the pipe from the inner surface side of the pipe, and to support the carriage against the shield by the front and rear wheels exposed outside the pipe before and after the pipe, Since the members for supporting the pipe do not protrude outside the pipe except for the wheels, the gap between the inner surface of the shield inside the tunnel and the outer surface of the pipe can be minimized, and the maximum diameter within the tunnel to be installed can be achieved. Since the pipes can be brought in, the economic effect was maximized.

[0003]

However, in the above-mentioned conventional structure, the front wheel may damage the inner surface of the pipe when the carriage is inserted into the pipe body, and when the carriage is pulled out after the pipe body is loaded. Sometimes there was a problem that the front wheel got caught in the pipe. Further, in loading and unloading the pipes, it is necessary to operate a lifting jig such as a jack for raising and lowering the pipes, which causes a problem that it takes time to carry in the pipes and pull out the cart.

The present invention solves the above-mentioned problems, and provides an insertion type tube carriage which can carry the carriage into the pipe body without damaging the inner surface of the pipe body and can easily pull out the carriage. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an insertion type pipe trolley of the present invention comprises a trolley having a shape that can be inserted into and removed from a pipe to be conveyed, and a pipe to be conveyed provided at a front end of the trolley. Auxiliary wheel device made of rubber that extends and retracts between a position in contact with the inner surface of the body and a position away from the body, and a front wheel that moves in and out between a position on the front portion of the carriage and a position apart from and in contact with the transport path surface. A device, a rear wheel device fixed to the carriage, and a truss device provided on the carriage so as to be extendable and retractable between a position in contact with the inner surface of the pipe to be conveyed and a position away from it. It was done.

[0006]

In the above structure, when the auxiliary wheel device is inserted into the pipe to be conveyed, the auxiliary wheel device is lowered to the position where it comes into contact with the inner surface of the pipe, and the front wheel device is stored in the retracted position away from the surface of the conveying path. Then, the truck is inserted into the pipe to be conveyed in a posture in which the front portion of the truck is supported by the auxiliary wheel device with respect to the inner surface of the pipe to be conveyed. At this time, the front wheel device does not come into contact with the inner surface of the pipe to be conveyed, and the auxiliary wheel device is made of rubber, so that the inner surface of the pipe to be conveyed is not damaged.

Then, when the front part of the carriage including the front wheel device comes out of the pipe to be conveyed, the front wheel device is projected to a position where it comes into contact with the conveyance path surface, and the front part of the carriage is against the conveyance path surface. It is supported by the front wheel device and also stores the auxiliary wheel device. Further, the truss device is extended to push up the pipe to be conveyed from the inner surface side, and lift the pipe to be conveyed from the surface of the conveyance path. Further, in a holding state in which the pipe body to be transported is supported on the transport surface by the truss device, the carriage, and the front and rear wheel devices, it is transported to the existing pipe body that has already been transported and installed.

Then, the auxiliary wheel device is lowered to a position where it comes into contact with the inner surface of the existing tubular body, and the front wheel device is stored in a retracted position away from the transport path surface. Further, the carriage is pushed forward in a posture in which the front part of the carriage is supported by the auxiliary wheel device with respect to the inner surface of the existing pipe, and the existing pipe and the pipe to be conveyed are butted against each other.

Then, the truss device is contracted to release the holding state of the pipe to be conveyed, and the carriage is retracted and pulled out from the pipe to be conveyed, but since the front wheel device is in the retracted state, it is caught on the pipe to be conveyed. In this way, the movement of the dolly 1 is not hindered.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, the carriage 1 is a pipe body 2 to be transported.
The auxiliary wheel device 3 is provided at the front end of the carriage 1. The auxiliary wheel device 3 has a front wheel 4 made of rubber, and an elevating device 5 for moving the front wheel 4 made of rubber into and out of a position where the front wheel 4 contacts the inner surface of the pipe body 2 to be conveyed and a position where the front wheel 4 is separated therefrom.

A front wheel device 6 is provided at the front part of the carriage 1. The front wheel device 6 is swingably provided between a position where it comes into contact with the transport path surface 7 and a position where it separates from it. 8 and a cylinder device 9 that drives the front wheels 8 to move back and forth in the swinging direction. Further, a rear wheel device 11 having a rear wheel 10 is fixedly installed at a rear portion of the carriage 1.

A truss device 12 is provided on the upper part of the carriage 1.
The truss device 12 is provided with a pair of left and right trusses 13 that are extendable and contractable between a position where the truss device 12 contacts the inner surface of the pipe body 2 to be conveyed and a position where the truss device 12 separates, and a cord body 14 for extending the truss 13. And a tightening machine 15. Further, the truss 13 has a plurality of joints 13a flexibly joined, both ends rotatably supported by the carriage 1, and the left and right trusses 13 are interlocked via a connecting member 16 coated with a rubber material or the like. Connected to.

The operation of the above structure will be described below.
When the carriage 1 is inserted into the pipe body 2 to be transported, the auxiliary wheel device 3 is driven to lower the auxiliary wheel 4 to a position where it comes into contact with the inner surface of the pipe body, and the cylinder device 9 of the front wheel device 6 is driven. The front wheels 8 are stored in a retracted position away from the transport path surface 7.

Then, the carriage 1 is inserted into the pipe body 2 to be conveyed in a posture in which the front portion of the carriage 1 is supported by the auxiliary wheels 4 with respect to the inner surface of the pipe body 2 to be conveyed. At this time, the front wheels 8 do not contact the inner surface of the pipe body 2 to be transported, and the auxiliary wheels 4 are made of rubber, so that the inner surface of the pipe body 2 to be transported is not damaged.

Then, as shown in FIG. 3, the front wheel device 6
At the time when the front part of the trolley 1 including the vehicle exits the pipe body 2 to be transported, the cylinder device 9 of the front wheel device 6 is driven to drive the front wheel 8
To the position where it abuts the transport path surface 7, the front portion of the carriage 1 is supported by the front wheels 8 with respect to the transport path surface 7, and the auxiliary wheel device 3 is driven to store the auxiliary wheels 4.
Further, the tightening machine 15 of the truss device 12 is driven to drive the rope 14
To extend the truss 13 and push up the pipe body 2 to be conveyed from the inner surface side via the connecting member 16 so that the conveyance path surface 7
The pipe body 2 to be transported is lifted up from.

Then, as shown in FIG. 4, the pipe body 2 to be conveyed is set to the truss device 12, the carriage 1, and the front and rear wheel devices 6, 11.
In the holding state in which it is supported on the transport path surface 7, the transport is carried to the existing pipe body 17 which has already been transported and installed.
Further, the auxiliary wheel device 5 is driven to lower the auxiliary wheel 4 to a position where it comes into contact with the inner surface of the existing pipe body 17, and the cylinder device 9 of the front wheel device 6 is driven to move the front wheel 8 from the transport path surface 7. Store in a retracted position away from you. Further, the carriage 1 is pushed forward in a posture in which the front portion of the carriage 1 is supported by the auxiliary wheels 4 with respect to the inner surface of the existing pipe body 17, and the existing pipe body 17 and the pipe 2 to be conveyed are butted.

Then, as shown in FIG.
A pipe support member 18 such as a square member is interposed between the transport path surface 7 and the transportation path surface 7, and the truss 13 is contracted by driving the tightening machine 15 to loosen the cord 14 so that the truss 1 for the transportation target pipe 2 is provided.
The holding state of 3 is released, and the carrying target tube 2 is temporarily centered. Further, a hook 20 provided at one end of the joining wire rope 19 is hung on the pipe end of the pipe 2 to be conveyed, and the retractor 21 is driven to restrain the pipe 2 to be conveyed. In this state, the carriage 1 is retracted and pulled out from the pipe body 2 to be transported. At this time, since the front wheel device 8 is in the retracted state, it does not hinder the movement of the carriage 1 by being caught by the pipe body 2 to be conveyed.

Then, the retractor 21 is driven to further retract the pipe 2 to be conveyed into the existing pipe body 17 to join the pipe joints.

[0019]

As described above, according to the present invention, since the front portion of the carriage is supported by the auxiliary wheel device with respect to the inner surface of the pipe to be conveyed when the carriage is inserted, the inner surface of the pipe to be conveyed is Without any damage, the truss device is contracted to release the holding state of the pipe to be conveyed, and the truck is retracted with the front wheel device retracted to pull out the truck from the pipe to be conveyed. It can be carried out.

[Brief description of drawings]

FIG. 1 is an overall front view of an insertion type pipe trolley showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is a view showing an operation of the insertion type pipe trolley in the same embodiment.

FIG. 4 is a view showing an operation of the insertion pipe carriage in the embodiment.

FIG. 5 is a view showing an operation of the insertion type pipe carriage in the embodiment.

[Explanation of symbols]

 1 dolly 2 pipe to be transported 3 auxiliary wheel device 6 front wheel device 12 truss device

Claims (1)

Claim: What is claimed is: 1. A trolley having a shape that can be inserted into and removed from a pipe to be conveyed, and a withdrawal position that extends from a position provided at the front end of the trolley to a position in contact with the inner surface of the pipe to be conveyed and a position away from it. Rubber-made auxiliary wheel device, a front wheel device that is provided in the front part of the carriage and moves back and forth between a position in contact with the transport path surface and a position apart from it, a rear wheel device fixed to the carriage, and a carriage An insertable pipe truck, comprising: a truss device provided on the top of the truss device so as to extend and contract between a position in contact with the inner surface of the pipe body to be transported and a position in which it is separated from the inner face.