JPH0220311Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a push-in amount adjustment mechanism for a non-discharge type tube-pipe device that is press-fitted into the soil.

[Purpose and structure of the idea]

When burying a pipe in the soil, the method of burying the pipe by excavating it to a predetermined depth from the ground, or by providing an appropriate pit without excavating from the ground, or in places where there is no need to provide a pit due to topography, A construction method is adopted in which the pipe bodies are sequentially buried by excavating or drilling holes in a predetermined direction from one side.

This invention eliminates the need to excavate and discharge earth and sand when constructing tunnels by burying small-diameter pipes, such as electrical conduits, water pipes, and gas pipes, in the ground.
This is a pushing amount adjustment mechanism of a pipe pushing device used in a method of burying pipe bodies one after another while pushing and propelling the main body of the pipe burying machine into the soil.

First, an outline of the construction method using a press-in, no-discharge type pipe burying machine will be explained with reference to FIG.

A pit P is dug in the soil, and a push pipe device 1 is installed in the pit P. 2 is the main body of the tube embedding machine, and 2' is a hydraulic cylinder. With the tube body 3 supported by the push tube device 1, the hydraulic cylinder 2'
extends in the direction of the arrow and is pressed into the soil. The reaction force due to this press-fitting operation is received by the moving part 6 of the pushing pipe device 1, and the moving part 6 of the pushing pipe device 1 moves in the direction of the arrow by the extended length of the hydraulic cylinder 2', causing the main body of the pipe burying machine to move. Then, the pipe bodies 3 are successively pushed into the soil without soil removal.

In the figure, 4 is a hydraulic power source, 4' is a hydraulic hose, 5 is an operation panel, and 5' is a control signal cable.

The present invention is attached to the above-mentioned push tube device 1, and will be explained with reference to the embodiments shown in FIGS. 2A, 2B and 2C.

Figure A is a top view, Figure B is a vertical sectional view taken along line A of Figure C, and Figure C is a horizontal side view.

In the figure, 17 and 18 are hydraulic cylinders, and 17' and 18' are their piston rods. 11 is the front slide base; 1
2 is a rear slide base, and the front slide base 11 is a hydraulic cylinder piston rod 17',
18', the rear slide base 12 is connected to the hydraulic cylinders 17 and 18, and the front slide base 11 and the rear slide base 12 engage with the engaging portion 20 of the floor plate 19 of the push pipe device 1. It can slide in the direction in which the piston rods 17', 18' of the hydraulic cylinder extend and contract.

22 is a guide bar of the rear slide base 12. With such a configuration, the hydraulic cylinders 17,
By applying force to the hydraulic cylinders 17 and 18 from one side, the front slide base 11 can move forward using the rear slide base 12 that connects the hydraulic cylinders 17 and 18 as a point of force, and by applying the force to the hydraulic cylinders 17 and 18 from the other side. , pull the rear slide base 12,
Shorten the distance between both slide bases.

In FIG. 2A, 13 is a positioning rod whose one end is fixed to the front slide base 11;
13' is a positioning plate attached to the positioning rod 13, and 14 is a positioning plate with one end attached to the front slide base 1.
1 is a positioning rod fixed to the positioning rod 14, and 14' is a positioning plate attached to the positioning rod 14;
5 and 16 are limit switches attached to the rear slide base 12. The positioning rods 13 and 14 are fixed in the direction of movement.

When the hydraulic cylinders 17 and 18 operate and their piston rods 17' and 18' extend, the front slide base 11 moves forward, so the rear slide base 12 and the front slide base 11 are spaced apart. , if we control this separation length, we get
The pushing amount will be controlled.

Since the positioning rod 13 is fixed to the front slide base 11, the positioning rod 13 also moves in the direction of the arrow along with the front slide base 11, as shown in FIG. Rear slide base 1 with positioning plate 13'
2, the operation of the hydraulic cylinders is electrically controlled by the signal from the limit switch 15, and the operation of the hydraulic cylinders 17 and 18 is stopped by this control.

As the positioning rod 13 moves in the direction of the arrow, the positioning rod 14 attached to the slide base 11 also moves in the direction of the arrow. As shown in FIG. The limit switch 16 has a positioning plate 14' attached to the rear slide base 12.
Since the limit switch 16 is separated from the limit switch 16, the signal transmission from the limit switch 16 is canceled. This limit switch 16
The off signal provides an electrical circuit that recognizes that the hydraulic cylinder is ready for the next operation.

The next movement of the hydraulic cylinder is a retraction movement.

By contracting the hydraulic cylinders 17 and 18, the rear slide base 12 moves in the direction of the arrow, and both slide bases approach each other. In this state, as shown in FIG. Become,
Therefore, the hydraulic cylinders 17, 18 are electrically controlled by signals sent from each limit switch, and the operation of the hydraulic cylinders 17, 18 is stopped by this control.

As explained above, in the state shown in FIG. 2, the limit switch 16 detects the contraction limit of the hydraulic cylinder and stops the operation of the hydraulic cylinder, and in the state shown in FIG. 3, the limit switch 15 detects the limit of extension. The operation of the hydraulic cylinder is stopped and the completion of preparation for the next operation of the hydraulic cylinder is recognized by signals sent from the two limit switches.

In addition, a solenoid valve built into the hydraulic power source 4 shown in FIG. 1 is operated by a signal sent from the limit switch via a relay or the like to control the movement of the hydraulic cylinder. Here, positioning plate 1
If the positioning rods 3' and 14' are movable and fixed on the positioning rods 13 and 14, the degree of expansion and contraction of the hydraulic cylinders 17 and 18 can be adjusted.

FIG. 4 shows another embodiment of the present invention.

Figure A is a top view, Figure B is a side view, and Figure C is a cross-sectional view. Although the figure shows one mechanism,
The limit switches 15 and 16 are each provided with the following mechanisms.

The positioning rod 13 has a plate-like cross section, and a sliding frame 21 having an elongated hole 20 is slidably fitted thereto, and the positioning plate 13' projects laterally sideways integrally with the sliding frame 21. It is formed to include a portion 24. The elongated hole 20 is formed in the length direction of the sliding frame 21, and the sliding frame 21 can be fixed by tightening the setscrew 23 onto the positioning rod 13 from above the elongated hole 20. The two setscrews 23 inserted into the positioning rod 1 are inserted to a certain extent inside both ends of the elongated hole 20.
Therefore, the positioning plate 13' provided on the sliding frame 21 is positioned so as to be fixed to the elongated hole 2.
0 end and the gap created by the set screw 23, arrow a
Since the positioning plate 13' can be moved as shown in , the position of the positioning plate 13' that pushes the limit switch 15 in the fixed position can be changed.

It goes without saying that the limit switch 16 also has a configuration similar to that described above.

In this way, the extension and contraction limit positions of the hydraulic cylinder shown in Figures 2 and 3 can be changed.
As a result, the amount of pushing by the front slide base 11 can also be adjusted.

The advantage of being able to adjust the amount of pushing by the front slide base 11 will be explained with reference to FIG.

Hydraulic cylinder 2' built into the pipe burying machine 2
When pushing the tube burying machine 2 and the tube 3 sequentially by the movable body 6 of the pushing tube device 1 by the same amount as the elongation of As , the length of one thrust gradually decreases. If the pushing length on the pushing pipe device side remains constant even though the pushing length is decreasing, the loss of pushing force will increase and the efficiency will decrease. To prevent this problem,
It is necessary to adjust the pushing amount by the front slide base 11.

〔effect〕

As explained in detail above, according to the present invention,
With the pipe body, the amount of movement of the slide base of the pushing pipe device can be adjusted during pipe construction, and the pipe body etc. can be pushed into the soil efficiently.

In particular, as shown in the embodiment shown in Fig. 4, a sliding frame with an elongated hole is fitted to the positioning rod, and two setscrews are inserted into the elongated hole to tighten the sliding frame within a certain range. Since the positioning plate is moved and fixed at that position, the adjustment can be made extremely simple.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a pipe body pushing method using a press-in, no-earth removal type pipe body burying machine. Figures 2A, 2B and 2C are a top view, a vertical sectional view and a lateral side view of an embodiment of the present invention, respectively. FIG. 3 is an explanatory diagram of the operation of the embodiment shown in FIG. 4A, 4B, and 4C are a top view, a front view, and a side view, respectively, showing the main parts of another embodiment of the present invention. 1...Push pipe device, 2...Pipe body embedding machine, 2'...
Hydraulic cylinder, 3... Pipe body, 4... Hydraulic source, 4'
... Hydraulic hose, 5 ... Operation panel, 5' ... Control signal cable, 6 ... Moving part, 11 ... Front slide base, 12 ... Rear slide base, 13,
14...Positioning rod, 13', 14'...Positioning plate, 15,16...Limit switch, 17,1
8... Hydraulic cylinder, 17', 18'... Piston rod of hydraulic cylinder, 19... Floor plate of push pipe device, 20... Elongated hole, 21... Sliding frame, 22... Guide bar.

Claims (1)

[Claims for Utility Model Registration] (1) A front slide base 11 and a rear slide base 12 that are engaged with a floor plate 19 and can slide on the floor plate 19 are provided, and the rear slide base 12 is equipped with hydraulic cylinders 17 and 18. The piston rods 17' and 18' of the hydraulic cylinders 17 and 18 are connected to the front slide base 11, and the rear slide base 1 is connected to the guide bar 22 on the floor plate 19 side.
In the push pipe device configured to guide the hydraulic cylinders 17, 2, the distance between the front slide base 11 and the rear slide base 12 due to the extension of the piston rods 17', 18' is determined.
Stop the operation of piston rod 17,1.
moving on a rod on the front slide base 11 in order to determine the approach length of the slide base 11 and the rear slide base 12 due to the contraction of the slide base 8' and stop the operation of the hydraulic cylinders 17, 18;
Positioning rods 13 and 14 equipped with fixable positioning plates 13' and 14' are placed parallel to the direction of movement of both slide bases and rear slide base 1.
2, and the positioning plate 1
3' and 14', limit switches 15 and 16 are respectively attached to the rear slide base 12. (2) The positioning plates 13', 14' attached to the positioning rods 13, 14 are provided with elongated holes in the length direction of the positioning rods 13, 14, and are made of a sliding frame 21 having trapezoidal protrusions 24 on the sides. A pushing amount adjustment mechanism for a pushing pipe device as set forth in claim (1) of the utility model registration.