JPH0847130A - Self-propelled duct continuity testing device - Google Patents

Abstract

PURPOSE:To obtain a self-propelled duct continuity testing device in which a bobbin can be passed inside a duct by one operator by a method wherein a self-propelled front tractor and a self-propelled rear tractor whose cross-sectional diameter is a little smaller than the cross-sectional diameter at the inner circumference of the duct are installed at the front and the rear of the bobbin and the respective tractors are operated by an operating machine. CONSTITUTION:Driving gears for a front tractor 3 and a rear tractor 4 are driven by the operation of an operating machine in a radio manner or via a wire 5; Thereby, wheels 8 are turned, and the front tractor 3 and the rear tractor 4 are run inside a duct 7. Thereby, a bobbin 1 which is coupled via joint mallets 2 in the middle of both tractors 3, 4 is run inside the duct 7. When the bobbin 1 or the like reaches one end of the duct 7 or when an obstacle exists inside the duct 7, the wheels 8 are turned reversely so as to be run backward. Thereby, the bobbin 1 is set to continuity inside the duct 7, and it is confirmed whether the inside of the duct 7 is deformed or an obstacle exists inside the duct. Thereby, the bobbin 1 can be passed through the inside of the duct 7 by one operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention tests whether a conduit is conducting or an obstacle is present on the inner circumference of the conduit when passing an electric wire or cable through a pipe buried in the ground. The present invention relates to a self-propelled pipeline continuity tester.

[0002]

2. Description of the Related Art Conventionally, in this type of conduit continuity tester, a tubular bobbin of a constant length having a diameter slightly smaller than the sectional diameter of the conduit is passed through the conduit. This is to pass the rope from one end of the conduit to the other end, further connect the bobbin to the wire through a wire after that, further connect the wire to the rear end of the bobbin and insert the bobbin into the conduit, Check that the pipeline is connected and that there are no obstacles.

[0003]

However, in this method, the operator has to pull the wire in front of and behind the bobbin at both ends of the pipe line and pull it out. Therefore, the labor of a plurality of workers is required and the work is troublesome.

The present invention has been made in view of these points, and it is an object of the present invention to provide a conduit continuity tester which allows a single worker to work extremely easily without requiring labor. Is.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention provides a conduit connection tester comprising a substantially cylindrical bobbin having a cross-sectional shape slightly smaller than the inner peripheral cross-sectional diameter of the pipe, and a universal joint is provided on both front and rear sides of the hobbin. A self-propelled front tractor and rear tractor are provided through each of these, and each of these tractors has a cross-sectional shape slightly smaller than the inner peripheral cross-sectional diameter of the pipeline and a total length shorter than the bobbin, Each device is provided with a wheel that is rotationally driven by each of these drive devices, and the drive device is configured to be operated by an operating device wirelessly or via a cable.

[0006]

In the present invention, when the operating device is operated, it is transmitted to each drive device of the front traction device and the rear traction device wirelessly or via a cable from the operation device to the rear traction device, and each drive device is driven. , Each wheel is driven to rotate. As a result, the front tractor and the rear tractor travel in the pipeline and pass the bobbin from one end of the pipeline to the other end. Then, when reaching the other end of the pipeline, each wheel is reversed by a limit switch or the like or operated by an operator and returns to the other end of the pipeline. At that time, even if the pipeline is slightly curved, the bobbin is connected to the front tractor and the rear tractor by a universal joint, and the total length of the front tractor and the rear tractor is shorter than the hobbin, so the bobbin passes through. It can pass through the curved pipe line.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a use state of the present invention, in which a front tractor 3 and a rear tractor 4 are connected to a front part and a rear part of a cylindrical bobbin 1 having a constant length via a joint rod 2. By these joint rods 2, the front tractor 3 or the rear tractor 4 and the bobbin 1 form a universal joint having two axial degrees of freedom.

Further, one end of a tail wire 5 is connected to the rear end of the rear tractor 4, and a control cable 6 is provided along the tail wire 5, and one end of the control cable 6 is attached to or detached from the rear tractor 4. It is freely connected and further connected to the front traction machine 3 via a joint rod 2, a bobbin 1, and another joint rod 2, and is connected to a drive device (not shown) in each traction machine 3, 4. The bobbin 1 is supported by the front traction machine 3 and the rear traction machine 4, and the line 7
Floats from the inner wall of the.

The front tractor 3 and the rear tractor 4 are slightly smaller than the duct 7 into which the sectional shapes of the main bodies 3a and 4a are inserted, as shown in FIGS. A large number of wheels 8 each having a diameter slightly larger than the height width of both side walls are provided on both sides of 4a, and the main bodies 3a, 4a are floated from the inner circumference of the conduit 7 by these wheels 8. Therefore, these towing machines 3 and 4 have never been told to fall in the pipeline. Further, the entire lengths of the front traction machine 3 and the rear traction machine 4 are shorter than the length of the bobbin 1, respectively. Further, a locking pin 9 for locking the tail wire 5 is provided at the rear end of the rear tractor 4.

In this embodiment, in order to pass these bobbins 1 through the pipeline 7, the front traction machine 3, the bobbin 1 and the rear traction machine 4 connected to the joint rod 2 are inserted from one end of the pipeline 7. , One end of the control cable 6 is connected to the rear end of the rear tractor 4, and further, one end of the tail wire 5 is locked, and an operating device (not shown) is operated to operate the front traction device 3 and the rear traction device 4.
The front traction machine 3 and the rear traction machine 4 travel in the pipe line 7 by driving the drive device of No. 3 and driving rotation of the wheels 8. At that time, the above-mentioned tail wire 5 is paid out in accordance with these runnings.

The bobbin 1 supported by these moves in the pipe line 7. When these bobbins 1 and the like reach one end of the pipeline 7, or when an obstacle or the like fits in the pipeline 7, the limit switch automatically rotates the wheel 8 in the reverse direction to travel in the returning direction, or An operator operates the operating device to rotate each drive device in the reverse direction and return travel. In this way, the bobbin 1 is electrically connected to the pipe line 7, and it is confirmed whether the inside of the pipe line 7 is deformed or there is an obstacle.

In the above embodiment, the drive devices for the front traction machine and the rear traction machine are operated by the operation machine via the cable, but the invention is not limited to this, and the drive apparatus can be moved wirelessly from the operation machine. Good. In the case of wireless, the control cable 6 and the tail wire 5 are unnecessary.

[0013]

According to the present invention, since the bobbin for the conduit continuity test is towed by the self-propelled towing machine, one operator can pass the bobbin into the conduit, and the workability is good. Moreover, in this invention, since the traction machine is provided in front of and behind the bobbin, the forward and backward traveling can be operated very reliably. In addition, the length of the front tractor and the rear tractor are each shorter than the length of the bobbin, and since they are connected by a universal joint, these can be sufficiently passed if they are curved pipelines through which the bobbin can pass. it can.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view showing a usage state of the present invention.

FIG. 2 is a side view of the towing machine of the present invention.

FIG. 3 is a rear view of the towing machine of the present invention.

[Explanation of symbols]

 1 Bobbin 2 Joint Rod 3 Front Traction Machine 4 Rear Traction Machine 5 Rear Hand Wire 6 Control Cable 7 Pipeline 8 Wheels

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideto Abe 4-83-3 Shibaura, Minato-ku, Tokyo Kandenko Co., Ltd. (72) Inventor Yasushi Sakakibara 4-83-3 Shibaura, Minato-ku, Tokyo Stocks Company Kandenko

Claims (1)

[Claims] 1. A pipe line continuity tester comprising a substantially cylindrical bobbin having a cross-sectional shape slightly smaller than the inner peripheral cross-sectional diameter of the pipe line,
A front traction machine and a rear traction machine are provided on both front and rear sides of the hobbin via universal joints, and each of these traction machines has a cross-sectional shape slightly smaller than the inner peripheral cross-sectional diameter of the pipeline and has an overall length shorter than that of the bobbin. A self-propelled conduit continuity tester, comprising driving devices and wheels that are rotated and driven by the driving devices, respectively, and the driving devices are operated by an operating device via a radio or a cable.