JPH02120171A - Overbending preventer for train type pipe travel device - Google Patents

Abstract

PURPOSE:To simply and surely preventing a succeeding carriage from over bending when each carriage passes through a bent pipe part by installing a stopper disk, where a tip outer circumferential part of the succeeding carriage or the like comes into contact, in a rear end of the travel carriage additionally. CONSTITUTION:Plural numbers of frames 14 with a driving wheel 20 at each tip are pivotally attached to a pin 13 of a base 12 fixed to an outer circumferential part of a carriage body 11. Then, a motor 15 for wheel driving and transmission means 17, 18 or the like are supported on each frame 14. In addition, each cylinder 25 pressing each driving wheel 20 to a pipe inner wall is installed interposingly between the carriage body 11 and each frame 14. Moreover, a connecting fitting 26 is set up in front and in the rear of the carriage body 11, and a working carriage or the like is connected to this connecting fitting by a reel 2 via a universal joint 27. At this time, when the carriage body 11 passes through a bent pipe part, the reel 2 is made contact with a stopper disk 28, thereby preventing its overbending from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an overbending prevention device for a train-type pipe running device.

[Prior Art] Recently, driving wheels of traveling trucks have been equipped with a plurality of barrel-shaped rollers rotatable in a direction perpendicular to the traveling direction along the outer periphery of the wheels, and they have been used not only for straight pipes but also for miter-bend pipes. A traveling trolley has been developed that can also be used for curved pipes such as.

[Problem to be solved] However, in the case of a train type in which a work trolley, etc. is connected to the above-mentioned running bogie, when it approaches a corner with an extremely large angle, the direction of the following work bogie, etc. changes to the direction of the towing running bogie. What is...
The vehicle may become at a nearly right angle, making it impossible to tow a following truck or the like.

It is an object of the present invention to provide an overbending prevention device for a train-type pipe running device that can solve the above-mentioned problems.

[Means for Solving the Problems] The overbending prevention device for a train-type pipe running system of the present invention is a train-type pipe running system configured by connecting a work cart or the like to a running bogie that travels in the pipe by drive wheels. In this invention, a stopper disk is provided at the rear end of the traveling carriage, with which the outer circumference of the leading end of the following working carriage comes into contact.

[Function] Even if the following work cart, etc. tries to make an extreme bend with respect to the towing truck after reaching the bent pipe section, the outer circumference of the leading end of the following truck, etc. is provided at the rear end of the towing truck. Since it comes into contact with the stopper disk, the direction of the following truck etc. is prevented from turning excessively with respect to the direction of the towing truck. This results in
It is possible to tow the following truck etc. without any problem.

[Example code] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, for example, the train-type pipe running system of the present invention is constructed by connecting a welding bogie 50 and a control bogie 5 between front and rear running bogies 10, and a wire reel 2 and a coupler between these bogies. 1st class is interposed.

An embodiment of the traveling trolley 10 will be described with reference to FIGS. 2 to 4.

The trolley body 11 is a tubular body with a hexagonal cross section, and a base 12 having a pin 13 is fixed to the center of each side thereof. A frame 14.14 having a drive wheel 20 at its tip is pivotally mounted to this pin 13 in the front-rear direction. Therefore, in this example, the main body 11 is provided with six frames 14 facing forward and six frames 14 facing backward.

Connecting hardware 26 is provided at the front and rear of the main body 11, and a work cart or the like is connected via a universal joint 27. In addition, in order to avoid excessive bending at the universal joint part when passing through the bent pipe part and causing trouble in running, a conical part 2 is provided, which the outer peripheral part of the tip of the connected truck etc. comes into contact with.
A stopper disc 28 is provided, on which a stopper disc 8a is formed.

Each frame 14 is constructed by connecting left and right members 14a and 14b, and a wheel drive motor 15 and a speed reducer 16 are sandwiched between the two members. The power from the motor 15 is transmitted to the reducer 16 via the belt 17, and the output from the reducer is transmitted to the drive wheels 20 via the chain 18.

The drive wheel 20 includes a wheel member in which three barrel-shaped rollers 22 having a curvature forming the outer periphery of the wheel are rotatably pivoted around the axis of the frame 21, and are equally spaced around the frame 21. 606 are constructed by overlapping each other with shifted phases. In this way, the outer peripheral surface of the wheel 20 is covered with six barrel-shaped rollers 22.
The barrel-shaped roller 22 can be freely rotated in the circumferential direction of the tube, and can move smoothly in the tube axis direction.

A cylinder 25 is connected at both ends to the main body 11 and each frame 14 via pins, and the drive wheel 20 is pressed against the inner wall of the pipe.

In this way, even when passing through a miter bend pipe section,
Since the barrel roller 22 freely rotates between the pipe wall and the pipe wall,
It can be passed through without loss of traction force.

When passing through a curved pipe section, as shown in FIG.
Since it comes into contact with the conical portion 28a, over-bending is prevented.

Further, since similar overbending prevention devices are provided at other connecting portions, the bent pipe portion can be run and towed without any problem.

[Effects of the Invention] The overbending prevention device of the train-type pipe running device of the present invention is as described above, and can run not only straight pipe sections and bent pipe sections having a certain radius, but also miter bend pipe sections without any problem. can do.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of the overall configuration of the device of the present invention, Figs. 2 to 4 show an example of a traveling trolley, Fig. 2 is a side view, Fig. 3 is a front view, FIG. 4 is a plan view of a pair of front and rear frames, and FIG. 5 is an explanatory diagram showing the operating state of the overbending prevention device. DESCRIPTION OF SYMBOLS 10... Traveling trolley, 11... Main body, 14... Frame, 20... Driving wheel, 22... Barrel-shaped roller,
25...Cylinder, 28...Stopper disk Patent attorney Takehiko Suzue

Claims (1)

[Claims] In a train-type intra-pipe traveling device that is configured by connecting a work cart or the like to a traveling cart that travels within the pipe using drive wheels,
An overbending prevention device for a train-type pipe-traveling device, comprising a stopper disk provided at the rear end of the traveling truck, with which the outer peripheral portion of the leading end of a following work truck or the like comes into contact.