JPH03468Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention shows a device for pushing a pipe into the ground.

FIG. 9 shows a conventional device of this type, in which a pin g of a chuck e is pivotally supported on a rod d of a propulsion cylinder C disposed in an installation pit a and driven by a hydraulic drive source b. It is configured to hold and fix the propulsion shaft h for pushing the tubular body, and drive the propulsion cylinder c to propel the propulsion shaft h.

The chuck f is configured such that the propulsion shaft h is manually fixed only in the pushing direction, and released in the pulling direction.

In the conventional device, during work, the propulsion shaft h
It is difficult to fix it horizontally due to the distribution of the supporting force of the pin f, and straight propulsion is not possible.

Furthermore, when connecting the next propulsion shaft h', the propulsion shaft h' is inserted from the rear of the chuck f and connected via the joint i, so that the width of the installation pit a becomes wider.

The present invention was proposed to solve these problems, and consists of a base member fixed to the inner bottom of the installation pit, a propulsion bearing stand and a propulsion bearing stand disposed on the main body so as to be movable forward and backward. It consists of a platform driving device and a propulsion shaft feeding device disposed on the propulsion shaft cradle, and the feeding device includes a fixed plate disposed on the pedestal, and a propulsion shaft feeding device arranged opposite to the fixed plate and connected via a parallel link mechanism. The present invention relates to a device for pushing a tube into the ground, characterized by comprising a moving plate mounted on the pedestal so as to be movable forward and backward, and a drive device for the moving plate.

In the apparatus for pushing a tube into the ground according to the present invention, the propulsion shaft is fixed to the propulsion shaft feeding device arranged on the propulsion bearing pedestal, and the propulsion bearing pedestal is fixed to the base member fixed to the inner bottom of the pit. The propulsion shaft is propelled by moving along the pedestal via the pedestal drive device.

The propulsion shaft feeding device includes a fixed plate disposed on the pedestal, and a movable shaft disposed opposite to the fixed plate and mounted on the pedestal through a parallel link mechanism so as to be movable forward and backward. Since it is composed of a plate and its driving device, by advancing the movable plate by the driving device, the movable plate is moved toward the fixed plate via the parallel link mechanism, and there is a space between the two plates. The propulsion shaft can be securely clamped and clamped, and the propulsion shaft can be propelled straight without wobbling, improving safety and propulsion accuracy.

According to the present invention, the propulsion shaft does not need to be inserted into the shaft feeding device from the propulsion direction as in the conventional case, but can be simply placed from above between the fixed and movable plates on the pedestal. Therefore, the installation pit only needs to be large enough to accommodate the base member, and the amount of earthwork, manpower, and time during installation can be significantly reduced.

In addition, by moving the movable plate until the parallel link connecting the movable plate and the propulsion shaft bearing stand is oriented in the opposite direction from the front at the point where the propulsion shaft is not clamped to the propulsion shaft feeding device, it is possible to By pulling out the propulsion shaft straight in the opposite direction to the work, and simultaneously propelling the propulsion shaft while connected in the pulling direction, the propulsion direction can be changed without moving the base member, and the pushing direction and the pulling out can be changed. Since coaxial propulsion is possible in the same direction, centering of the propulsion shaft becomes easy and the number of man-hours is reduced.

The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes a base member fixed to the bottom surface of the installation pit 2 via spikes 3. Same base member 1
A guide rail 4 is laid on top, and a propulsion bearing stand 5
A roller 6 is rotatably engaged with the guide rail 4. Further, the cylinder head side of the hydraulic cylinder 7 constituting the driving device for the propulsion bearing pedestal 5 is pivotally connected to the base member, and the rod side is pivotally connected to the pedestal 5, and propulsion is achieved by expanding and contracting the rod of the hydraulic cylinder 7. The bearing stand 5 is configured to move horizontally forward and backward along the guide rail 4. 8 in the figure is a hydraulic power source.

A propulsion shaft feeding device is disposed on the propulsion shaft pedestal 5, and the device is provided with a fixed plate 9 fixed on the pedestal 5 and extending in the propulsion direction, and provided opposite to the fixed plate 9, and A moving plate 13 connected to the table 5 by a parallel link 12 whose both ends are pivotally connected via pins 10 and 11, respectively;
Attach the pin 15 to the pedestal 5 on the cylinder head side.
The hydraulic cylinder 16 is pivotally connected to the movable plate 13 via a pin 14 on the rod side. The same hydraulic cylinder 16
constitutes a driving device for the moving plate 13.

In the figure, reference numeral 17 denotes a guide for supporting the propulsion shaft A, which is disposed on the propulsion bearing stand 5 in the propulsion shaft feeding direction.

Since the illustrated embodiment is configured as described above, the propulsion shaft A is placed from above between the fixed plate 9 and the movable plate 13 on the propulsion bearing stand 5, and the hydraulic cylinder 16 is retracted to move the movable plate 1
3 is moved to the fixed plate 9 side via the parallel link 12, and the propulsion shaft A is gripped between both plates 9 and 13.

In this state, the hydraulic cylinder 7 is extended to move the propulsion bearing pedestal 5 forward, and the propulsion shaft gripped by the shaft feeding device on the pedestal 5 is propelled straight to push the tube into the ground.

At this time, due to the frictional force generated when the propulsion shaft A is propelled into the soil, the parallel link 12 rotates inward, moving the propulsion shaft A in the front and rear direction, so that the plates 9 and 13 come into contact with each other. The surface is securely pressed against the propulsion shaft A to fix it. (Figures 4 and 5
(See figure) When the stroke of the hydraulic cylinder 7 reaches its maximum, the hydraulic cylinder 16 is extended to separate the movable plate 13 from the fixed plate 9, releasing the fixation of the propulsion shaft A, and the hydraulic cylinder 7 is retracted. Then, the propulsion bearing stand 5 is retreated to the required position.

Below, repeat the above operations to propel the propulsion shaft A,
When the same propulsion shaft A is pushed all the way, the next propulsion shaft
Continuing step A', repeat the above operation to enable continuous pushing of the propulsion shaft. (See Figure 6) When changing the propulsion direction, retract the hydraulic cylinder 16 at a point where the propulsion shaft A is not clamped to the shaft feeder so that the parallel link 12 is oriented in the opposite direction. Retract the moving plate 13 until
The propulsion shaft A can be pulled out straight by doing the opposite work to the pushing operation, and at the same time it can be propelled with the propulsion shaft A connected in the pulling direction.

(See Figures 7 and 8) According to the illustrated embodiment, the propulsion shaft A is propelled while being firmly held between the fixed and movable plates 9 and 13 of the shaft feeding device, and there is no wobbling. Since automatic propulsion can be performed, safety and propulsion accuracy are improved, and the propulsion direction of the propulsion shaft A can be changed without moving the base member 1, and coaxial propulsion can be performed in the push-in direction and the pull-out direction as shown in FIG. Centering of the propulsion shaft A becomes easier and the number of work steps is reduced.

Furthermore, since the propulsion shaft A need only be mounted from above without being inserted into the shaft feeder from the propulsion direction, the installation pit 2 only needs to be large enough to accommodate the base member 1. Time and work man-hours are reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the apparatus for pushing a tube into the ground according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a front view thereof, and Figs. 4 and 5 are respectively thereof. A vertical sectional view and a side view showing the action of the propulsion shaft feeding device part, Fig. 6 is a plan view showing the joint state of the propulsion shaft, and Fig. 7 shows the action of the propulsion shaft feeding device part when changing the propulsion direction. FIG. 8 is a longitudinal sectional side view showing a working state during propulsion direction change, and FIG. 9 is a side view of a conventional tube pushing device into the ground. 1...Base member, 2...Installation pit, 5...
...Propulsion bearing stand, 7...Hydraulic cylinder, 9...Fixed plate, 12...Parallel link, 13...Moving plate, 16...Hydraulic cylinder, A...Propulsion shaft.

Claims (1)

[Scope of utility model registration request] A base member fixed to the inner bottom of the installation pit,
It consists of a propulsion bearing pedestal and a pedestal driving device disposed on the main body so as to be movable forward and backward, and a propulsion shaft feeding device disposed on the propulsion bearing pedestal, and the feeding device is disposed on the pedestal. A tube body comprising a fixed plate, a movable plate opposite to the fixed plate and mounted movably forward and backward on the pedestal via a parallel link mechanism, and a drive device for the movable plate. Underground pushing equipment.