JP2001099352A - Tubular body carrying carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability when changing a traveling direction with a mechanism having a simple structure. SOLUTION: This carrier is provided with guide wheels 11 arranged in front of a carrier body 10 so as to change the traveling direction, a guide bar 24 for changing direction of the guide wheels 11, a screw rod 25, a guide nut 27 screwed to the screw rod 25 and connected to the guide bar 24, and a handle 26 for giving the rotating force to the screw rod 25. The guide nut 27 is moved by operating the handle 26, and the guide bar 24 is moved with this movement of the guide nut 27 so as to change direction of the guide wheels 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube transport cart used for inserting a new pipe into an existing pipe such as a sewer or agricultural waterway.

[0002]

2. Description of the Related Art Conventionally, various methods have been adopted as a method for rehabilitating an aging existing pipe. Recently, a new pipe having a diameter slightly smaller than the existing pipe has been installed inside the aging existing pipe. Rehabilitation method (hereinafter referred to as pipe-in-pipe method) of transporting a trolley by using a trolley and connecting it inside an existing pipe.

Japanese Utility Model Publication No. Sho 58-36942 discloses a truck for transporting a pipe used in such a pipe-in-pipe method, which is provided with a cantilever-type pipe holding rod which can be moved up and down. I have. However, according to the tube transporting truck described in this publication, since the tube holding rod is cantilevered, the tip of the tube holding rod may be bent when the new tube is held. Therefore, when a new pipe having a large weight and a large diameter is held, the lower end of the new pipe comes into contact with the existing pipe, which causes a problem that the new pipe is damaged and a pipe insertion operation cannot be performed smoothly.

In order to solve such a problem, height adjusting devices are provided at the front and rear portions on the bogie main body, and support beams are erected on the height adjusting devices at the front and rear portions, and these support beams carry new pipes. There has been proposed a tube transporting truck having a structure capable of moving inside an existing pipe while being raised (Japanese Utility Model Laid-Open No. 62-16875).

[0005] Japanese Patent Application Laid-Open No. 9-018630 describes an apparatus for moving such a tube transporting carriage in an existing pipe.
There is a battery car described in Japanese Patent Publication No. Further, as means for changing the traveling direction of the tube transport carriage, a traveling direction changing guide wheel provided in front of the traveling direction of the bogie main body and a direction of the guide wheel connected to a frame of the guide wheel are changed. There is a steering mechanism consisting of a guide bar that moves.

[0006]

According to the above-described steering mechanism of the tube transporting cart, the guide bar is moved left and right to change the direction of the guide wheels. Since human power is directly applied to the guide bar, there is a problem that operability is poor because a large force is required when changing course.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a tube transport cart having good operability when changing the traveling direction.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a tube transport truck according to the present invention is provided with a height adjusting device at the front and rear portions on the bogie main body. In a tube transporting truck having a supporting beam spanned so that the longitudinal direction thereof is along the traveling direction of the truck, a guide wheel for changing the traveling direction arranged in front of the truck body, A guide bar for changing the direction of the guide wheel, a screw bar, a guide nut screwed into the screw bar and connected to the guide bar, and a handle for applying a rotational force to the screw bar are provided, and operation of the handle is provided. Accordingly, the guide nut is moved, and the guide bar is moved accordingly, thereby changing the direction of the guide wheel.

According to the tube transporting cart of the present invention, a guide bar for changing the direction of a guide wheel disposed in front of the cart body is combined with a feed screw mechanism comprising a screw rod and a guide nut, and a handle or the like is combined. Since the mechanism is configured to be moved by the mechanism, the operator can easily change the course without particularly requiring a strong force by operating the handle. In addition, since a feed screw mechanism is used for moving the guide bar, controllability when changing the course is improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are a side view and a front view, respectively, of an embodiment of the present invention. FIG. 3 is a perspective view schematically showing a main structure of the steering mechanism, and FIG. 4 is a view of a guide wheel of the steering mechanism viewed from above.

First, the bogie main body 10 includes a front mount 15 and a rear mount 16 arranged opposite to each other, a connecting member 17 for connecting the front and rear mounts 15 and 16 to each other, and a front mount 15 and a rear mount 15. 2 at the bottom of the rear mount 16
Each of the wheels 11 is provided. The total length of the bogie body 10 is longer than the length of the new pipe P2 by a predetermined amount, and the front and rear wheels 11 protrude from the front and rear ends of the new pipe P2 when the pipe transport truck 1 passes through the new pipe P2. Has become.

At the upper center of the front frame 15 and the rear frame 16, height adjusting devices 12 and 13 using hydraulic cylinders as actuators are provided, respectively, and extend over these height adjusting devices 12 and 13. A support beam 14 is erected. The longitudinal direction of the support beam 14 coincides with the traveling direction of the tube transporting carriage 1.

A steering mechanism 2 is provided at a front portion of the bogie main body 10. In addition, a connecting mechanism 3 having a wheel 31 at a tip is provided at a rear portion of the bogie main body 10.

The steering mechanism 2 includes, as shown in FIGS.
A pair of left and right guide wheels 21 for changing the traveling direction is provided. These guide wheels 21 are provided with brackets 2 projecting obliquely forward (downward) from above the front frame 15 of the bogie main body 10.
It is rotatably attached to the end of the “0”.

Each of the left and right guide wheels 21 is provided with a U-shaped frame 22. Each frame 22 is attached to both ends of the axle 21a of the guide wheel 21. Also,
A connecting rod 23 is bridged between the left and right guide wheels 21, and both ends of the connecting rod 23 are connected to the left and right frames 2 via a connecting pin 23a and a connecting plate 22a, respectively.
2 are connected. A guide bar 24 extending in the vertical direction is fixed to the connecting rod 23. The guide bar 24 is moved in the left-right direction (lateral direction) to
By moving 3 in the left-right direction, the directions of the left and right guide wheels 21 can be changed (see FIG. 5).

As shown in FIGS. 2 and 4, the guide bar 24 is provided through a slit hole 20a opened in front of the bracket 20, and extends in the left-right direction along the slit hole 20a. It is configured to move.

The steering mechanism 2 is provided with a threaded rod (right-hand thread) 25 for applying an operating force to the guide bar 24. The screw rod 25 is located above the guide wheel 21 and is disposed along a direction (lateral direction) orthogonal to the longitudinal direction of the support beam 14.

The screw rod 25 is supported by a column 28 extending upward from the tip of the bracket 20 via a bearing 29, and a handle 26 is attached to one end thereof.
A disk-shaped guide nut 27 is screwed into the screw rod 25, and the guide bar 24 is fixed to the outer peripheral surface of the guide nut 27 by welding or the like. The guide bar 24 and the guide nut 2 are located below the guide nut 27.
A reinforcement stay 24a for increasing the fixing strength with the fixing member 7 is fixed.

The operation of the steering mechanism 2 will be described with reference to FIGS. First, when the handle 26 is rotated clockwise from the straight traveling state shown in FIG. 4, the guide nut 27 moves to the side approaching the handle 26, and the guide bar 24 and the connecting rod 23 move accordingly. When viewed from the front, the wheels 21 move leftward (rightward in the traveling direction) (FIG. 5 (A)), and the traveling direction of the tube transport vehicle 1 turns rightward. On the other hand, when the handle 26 is rotated counterclockwise from the straight traveling state shown in FIG. 4, the guide nut 27 moves to the side away from the handle 26, and accordingly, the guide bar 24 and the connecting rod 23 move.
The guide wheel 21 moves rightward (leftward in the traveling direction) when viewed from the front (FIG. 5 (B)), and the traveling direction of the tube transport carriage 1 turns leftward.

As described above, in the steering mechanism 2 according to the present embodiment, the course of the tube transporting cart 1 can be easily changed by merely rotating the handle 26 without requiring a particularly strong force. .

In this embodiment, for example, a newly installed pipe (R) having a diameter of φ2600 mm and a pipe length of 4000 mm
When the conveyance of the CP) is intended, the specific dimensions of each part of the guide wheel 21 are, for example, a wheel outer diameter: 300 mm, a wheel width: 100 mm, and a wheel interval: 1300 mm. The size of the handle 26 is preferably about 500 mm in diameter in consideration of workability. Note that each member of the steering mechanism 2 and the main part of the bogie main body 10 are S
A steel material such as S material is used.

Then, the tube transporting cart 1 of the present embodiment.
As shown in FIG. 1, the new pipe P2 is
Can be moved in the existing pipe P1 or entered into the existing pipe P1 while holding.

The holding of the new pipe P2 on the pipe transport carriage 1 is performed by lowering the height adjusting devices 12 and 13 to lower the height of the support beam 14 and transferring the pipe into the new pipe P2. The front and rear wheels 11 are arranged outside the front and rear ends of the new pipe P2 through the carriage 1. Next, the height adjusting devices 12 and 13
Is driven to lift the support beam 14 upward and carry the new pipe P2 by the support beam 14.

The movement of the tube transporting cart 1 is performed by using a battery car 100 as shown in FIG. The battery car 100 includes a front wheel 101 and a rear wheel 102, an electric motor (not shown) for driving the front wheel 101, a battery 103 for supplying electric power to the electric motor, the front wheel 101 and the rear wheel 10
Steering means 10 for steering both or one of the two
4 and an elevating mechanism 105 installed in front of the front wheel 101. The elevating mechanism 105 is provided with a connection box 106 having an opening at the top, and in the connection box 106, the wheels 31 of the connection mechanism 3 of the tube transport vehicle 1 are provided.
And the wheels 31 roll the bottom of the connection box 106 so that the battery car 100 and the tube transport carriage 1 can be connected with play.

The wheels 31 of the connecting mechanism 3 are connected to the connecting box 10
6 is performed by moving the battery car 100 toward the rear of the tube transport carriage 1 with the lifting mechanism 105 lowered to the lower end, and connecting the connecting box 106 below the wheels 31 of the connecting mechanism 3. And then the lifting mechanism 105 is
The operation is performed in such a manner that the wheel 31 is raised until it contacts the bottom of the connection box 106.

[0027]

As described above, according to the tube transporting cart of the present invention, the direction of the guide wheel for changing the traveling direction, which is disposed in front of the cart main body, can be adjusted by changing the direction of the screw rod into which the guide nut is screwed. Since it is configured to change using a mechanism that includes a handle that applies a rotational force to this screw rod and a guide bar that changes the direction of the guide wheel, operability when changing the traveling direction in the existing pipe And the efficiency of the work of laying new pipes can be improved.
Moreover, such an effect can be achieved with a simple configuration by simply adding a screw rod, a guide nut, a handle, and the like to the conventional steering mechanism.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment of the present invention.

FIG. 3 is a perspective view schematically showing a main structure of a steering mechanism used in the embodiment of the present invention.

FIG. 4 is a view of a guide wheel of the steering mechanism as viewed from above.

FIG. 5 is an operation explanatory view of the embodiment of the present invention, and is a diagram in which a guide wheel is viewed from above.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 tube transport cart 10 cart main body 11 wheels 12 and 13 height adjusting device 14 support beam 2 steering mechanism 20 bracket 20a slit hole 21 guide wheel 22 frame 22a connecting plate 23 connecting rod 23a connecting pin 24 guide bar 25 screw bar 26 Handle 27 Guide nut 28 Prop 29 Bearing 3 Connection mechanism 31 Wheel 100 Battery car 106 Connection box P1 Existing pipe P2 New pipe

Claims (1)

[Claims] 1. A height adjusting device is provided on a front and rear portion of a bogie main body, and a support beam is erected across the height adjusting device of the front and rear portions so that a longitudinal direction thereof is along a traveling direction of the bogie. In a tubular body transporting trolley, a guide wheel for changing the traveling direction arranged in front of the bogie main body, and a guide bar for changing the direction of the guide wheel,
A threaded rod, a guide nut screwed into the threaded rod and connected to the guide bar, and a handle for applying a rotational force to the threaded rod are provided, and the operation of the handle causes the guide nut to move. And a guide bar that moves to change the direction of the guide wheels.