JPH0330467Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an excavation angle adjustment device for a small diameter tube propulsion machine that can change the inclination of the propulsion machine depending on the target position.

[Conventional technology] When laying small-diameter pipes such as water and sewage pipes, gas pipes, and power cables underground, the common construction method is to cut through the road surface, but this requires a lot of labor and effort, such as traffic control measures. There are problems such as high costs,
Recently, underground propulsion construction methods using propulsion machines have been attempted.

This construction method involves digging a starting shaft and a reaching shaft on the road surface before and after laying the pipe, installing a propulsion machine in the starting shaft, and using the propulsion machine to propel a leading body that continues the rod to form a pilot hole. This is to propel the laying pipe into the pilot hole.

[Problem that the invention attempts to solve]

The propulsion machine installed in the starting shaft is difficult to attach to the target position due to the shape of the bottom of the starting shaft, such as the slope, and the propulsion machine must be re-lifted several times with a crane or the bottom must be corrected. It didn't happen.

Therefore, an object of the present invention is to provide an excavation angle adjustment device for a small-diameter tube propulsion machine that can change the inclination of the propulsion machine depending on the target position.

[Means for solving problems]

The present invention provides a small-diameter tube propulsion machine that includes an underseat, a middle seat disposed above the underseat, and a floor seat slidably disposed above the middle seat. The front part is rotatably attached to a plate fixed to the underseat using a pin, and the rear of the middle seat is connected to a tilt cylinder that has one end attached to the underseat, and the middle seat and floor seat can be tilted by expanding and contracting the tilt cylinder. The floor seat is tilted by the expansion and contraction of the tilt cylinder.

[Effect]

Since the floor sheet can be tilted by expanding and contracting the tilt cylinder, it is easy to adjust the digging angle.

〔Example〕

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the propulsion device, FIG. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view of FIG. 3 is a sectional view, FIG. 5 is an operating state diagram, and FIG. 6 is a hydraulic circuit diagram.

1 is a propulsion device, which includes an under seat 2, a middle seat 3, a floor seat 4, a push plate 5, a pressure plate 6,
It is composed of a propulsion cylinder 7, an outrigger 8, a tilt cylinder 9, a rotation device 10, a hook device 11, a lock device 12, etc., which are arranged on the floor seat 4. 13 is a guide body, and 14 is a rod.

The underseat 2 is placed on the starting shaft, the front part of the middle seat 3 is rotatably attached to a plate 15 fixed to the underseat 2 with a pin 16, and the rear part of the middle seat 3 is attached at one end to the underseat 2. connected to the tilt cylinder 9,
The floor seat 4 is slidably attached to a guide bar 17 fixed to the middle seat 3.

A propulsion cylinder 7 that moves the floor seat 4 forward and backward.
connects the middle seat 3 and the floor seat 4.

The outrigger 8 is rotatably attached at one end to the underseat 2 and at the other end to the push plate 5 which is press-fitted to the front wall of the starting shaft. 21 is a directional control valve.

Next, its effect will be explained.

By extending the tilt cylinder 9, the middle seat 3 rotates around the pin 16, and the rear part of the middle seat 3 rises. Therefore, the floor seat 4 is tilted forward and downward relative to the under seat 2. (FIG. 5) By retracting the tilt cylinder 9, the middle seat 3 rotates around the pin 16, and the rear part of the middle seat 3 descends. Therefore, the floor seat 4 is positioned downwardly at the rear with respect to the under seat 2.

[Effect of idea]

In short, according to the present invention, the floor sheet can be tilted freely by the tilt cylinder, so even if the bottom of the starting shaft is inclined, it is easy to install the propulsion unit to direct the guide body to the target position without having to correct the bottom of the starting shaft. Can be done. Further, since the floor sheet can be easily tilted, it is easy to adjust the digging angle to direct the guide body to the target position. Therefore, the excavation angle for drilling a horizontal hole or an inclined hole can be easily adjusted, and work efficiency is improved.

[Brief explanation of the drawing]

Figure 1 is a plan view of the propulsion device, Figure 2 is a sectional view of Figure 1, Figure 3 is a sectional view of Figure 1, Figure 4 is a sectional view of Figure 3, and Figure 5 is a sectional view of Figure 3. The operating state diagram, FIG. 6, is a hydraulic circuit diagram. 2...Under seat, 3...Middle seat,
4... Floor seat, 9... Chilled cylinder, 1
5...Plate, 16...Pin.

Claims (1)

[Scope of utility model registration request] In a small-diameter tube propulsion machine equipped with an underseat, a middle seat disposed above the underseat, and a floor sheet slidably disposed above the middle seat, the front part of the middle seat is disposed under the underseat. In addition to being rotatably attached to a plate fixed to the seat with a pin, the rear of the middle seat is connected to a tilt cylinder whose one end is attached to the underseat, and the middle seat and floor seat can be tilted by expanding and contracting the tilt cylinder. Features: An excavation angle adjustment device for small diameter tube propulsion machines.