JPH07119559B2 - Conveyor cart with centering mechanism - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carriage with a centering mechanism for carrying and centering a pipe when laying the pipe in a tunnel.

2. Description of the Related Art Conventionally, when laying a pipe in a tunnel, a carrier is used to transport the pipe to the installation site, and the pipe unloaded from the carrier is manually connected to the already laid pipe. It was

SUMMARY OF THE INVENTION However, it is difficult to adjust the posture of a newly connected pipe in a narrow tunnel so as to be centered with respect to a pipe that has already been laid. However, there is a problem that the deformed tube is difficult to handle in terms of shape.

The present invention solves the above-described problems, and an object of the present invention is to provide a transporting carriage with a centering mechanism that can transport a pipe and adjust the posture of the pipe to center the pipe.

Means for Solving the Problems In order to solve the above problems, the present invention relates to a trolley that travels on a pair of left and right rails, and a holding means that lifts up a pipe to be conveyed from the traveling vehicle body, and the traveling vehicle body is moved in the track direction. The centering means is provided separately and stored inside the traveling vehicle body, and the centering means provides the traveling vehicle body with the axles slidable in the rail track direction. A pair of left and right traveling wheels that roll, and a return cylinder that presses the traveling vehicle body in the track direction of the rail against the axle is fixed to the traveling vehicle body at one end and the other end is fixed to the axle. It was done.

With the above configuration, the pipe to be transported is placed on the traveling vehicle body, and the traveling vehicle body travels on the rails via the traveling wheels to transport the pipe to be transported to the target position, and the pipe is transported at the target position. It is laid down from the vehicle body. At this time, when it is necessary to center the pipe that has already been conveyed with respect to the pipe that has already been laid, the return cylinder is driven while the pipe is placed on the traveling vehicle body and is supported by the rail. The traveling vehicle body is pressed in the track direction of the rail against the traveling wheels and the axles, and the posture of the pipe to be conveyed placed on the traveling vehicle body is controlled and centered.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
1 to 4, a pair of left and right rails 2 are laid inside the tunnel 1, and a traveling vehicle body 4 of a carrier truck 3 moving on the rails 2 is provided with a pair of front and rear axles 5 and 6. A pair of left and right traveling wheels 7 rolling on the rail 2 are mounted on both ends of each axle 5,6. Further, the traveling vehicle body 4 holds an axle 6 located at a rear portion thereof via bearings 8 so as to be slidable in the track direction of the rail 2. Further, a pair of return cylinders 9 and 10 are provided with one end fixed to the traveling vehicle body 4 and the other end fixed to the axle 6, so that both return cylinders 9 and 10 face in opposite directions. It is provided to stretch.

The traveling vehicle body 4 is provided with four holders 12 for supporting the pipes 11 to be conveyed at front, rear, left and right positions. The holder 12 is provided on the traveling vehicle body 4 and is provided with an arm 13 that is vertically swingable.
Is rotatably provided at one end of the. Further, one end of a single acting cylinder 14 is rotatably connected to the other end of the arm 13, and the other end of the single acting cylinder 14 is rotatably connected to the traveling vehicle body 4.

An operation carriage 15 is connected to the rear of the transport carriage 3, and the operation carriage 15 is a wheel for traveling on the rail 2.
A first manual hydraulic pump 17 for supplying drive oil to the return cylinders 9 and 10 and a second manual hydraulic pump 18 for supplying drive oil to the single-acting cylinder 14 are provided. . Further, a control circuit for controlling supply and stop of driving oil and a plurality of valves 19 are provided in the operation carriage 15.

The operation of the above configuration will be described below. The pipe 11 to be conveyed is placed on the traveling car body 4 while being supported by the holder 12, and the traveling car body 4 travels on the rail 2 via the traveling wheels 7 so that the pipe 11 to be conveyed is moved to the target position. Transport to. Then, at the target position, the second manual hydraulic pump 18
And the valve 19 of the control circuit is operated to extend the single-acting cylinder 14 and the arm 13 swings to lift the pipe 11 from the traveling vehicle body 4 via the holder 12. Further, a jack or the like is interposed between the pipe 11 and the inner wall surface of the tunnel 1, and the pipe 11 is lowered from the traveling vehicle body 4 and laid on the tunnel 1. At this time, when it is necessary to center the pipe 11 that has been conveyed with respect to the pipe 11 that has already been laid, the traveling vehicle body 4
With the pipe 11 placed on the rail 2, the first manual hydraulic pump 17 is driven, and the corresponding valve 19 is operated to extend and retract the return cylinders 9 and 10 in the direction opposite to the rail 2.
The traveling vehicle body 4 is pushed toward one side of the rail 2 in the gauge direction with respect to the traveling wheels 7 and the axles 6 supported on the traveling vehicle body 4 and the posture of the traveling vehicle body 4 is changed, so that the conveyance body 4 is conveyed. The posture of the target tube 11 is controlled to center it.

Drive sources such as the first and second manual hydraulic pumps 17 and 18 can be provided integrally with the traveling vehicle body 4, and return cylinders 9 and 10 can also be provided to the front axle 5. Is.

EFFECTS OF THE INVENTION As described above, according to the present invention, the return cylinder is driven in a state where the pipe is placed on the traveling vehicle body, and the traveling vehicle body of the rail is supported by the traveling wheel and the axle supported by the rail. By pushing in the track direction to change the posture of the traveling vehicle body, it is possible to control the posture of the pipe to be conveyed placed on the traveling vehicle body and center it easily.

[Brief description of drawings]

FIG. 1 is an overall plan view of a carrier truck according to an embodiment of the present invention, and FIG. 2 is an overall side view of the carrier truck according to the embodiment.
FIG. 3 is an overall plan view of a carrier vehicle and an operation vehicle in the same embodiment, and FIG. 4 is an overall side view of the operation vehicle in the same embodiment. 1 ... Kundou, 2 ... Rail, 3 ... Transport truck, 4 ... Truck body, 6 ... Axle, 7 ... Truck wheel, 9,10 ... Return cylinder, 11 ... Pipe.

Claims (1)

[Claims] 1. A trolley which travels on a pair of left and right rails, wherein a holding means for lifting a pipe to be transported from the traveling vehicle body and a centering means for moving the traveling vehicle body in the track direction are independent of each other. It is housed inside, and the centering means is provided with an axle that is slidable in the rail track direction on the traveling vehicle body, and a pair of left and right traveling wheels that roll on each rail are provided at both ends of the axle. On the other hand, a carrier truck with a centering mechanism, characterized in that a return cylinder for pressing the traveling vehicle body in the rail track direction is provided with one end fixed to the traveling vehicle body and the other end fixed to the axle.