JPH0332632Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of the invention) This invention relates to a pipe propulsion device that is installed in a shaft and press-fits and buries the pipe into the ground.

(Background of the invention) As shown in Fig. 10, the conventional pipe propulsion method is to provide a reaction wall b in a shaft a, and move the pipe d by means of a jack C supported by the reaction wall b. It is propelled and press-fitted into the ground e, and after fully extending the jack C, it is contracted to interpose a spacer f between the jack C and the pipe body d, and by repeating this process, the pipe body d is
Alternatively, as a method without using a spacer, a two-stage jack is used to propel the length of the tube at one time.

However, the former method requires a space to temporarily place the spacer in the shaft, which requires a large floor area of the shaft, which requires considerable time and effort to excavate the shaft, and also reduces the traffic volume in cities. The latter method cannot be used in many places, and the latter method requires special jacks, resulting in high inspection, repair, and manufacturing costs.

Patent application No. 55-179879 to solve these problems
As disclosed in (Japanese Patent Application Laid-Open No. 57-104796),
The jack and spacer are incorporated into the same frame, and the spacer is detachably attached to the cylinder part, thereby shortening the overall length of the device and reducing labor.

However, this device also requires space for the spacer to rotate, and the work space becomes narrow, which poses an obstacle to the work of connecting the propulsion tubes. Furthermore, the equipment was heavy and required a lot of expense to move.

(Purpose of the invention) This invention eliminates the conventional spacer, eliminates the need for its rotation space, and reduces the weight of the device.
Another object of the present invention is to provide a tubular propulsion device that can shorten the length of the entire device.

(Summary of the invention) This invention has a pressing part that is movable in the front and back direction.
It is characterized by a tubular propulsion device that sequentially presses the front and rear ends of the cylinder part of a jack with the rod end facing the reaction wall.

(Embodiment of the invention) An embodiment of the invention will be described in detail below based on the drawings.

The drawing shows a tubular propulsion device, and the reference numeral 1 in the drawing is a pedestal on which rails 2 are laid in the longitudinal direction, and it can be installed in the desired state at the bottom of a shaft 32 by height adjustment bolts 3. .

The pedestal 1 is longer than the buried pipe 4 and wider than its outer diameter. A pedestal 5 for supporting the buried pipe 4 is attached to the front end of the pedestal 1 to set the buried position of the buried pipe 4. A rectangular reaction frame 6 having the same width and appropriate height as the pedestal 1 is fixed, and the rail 2 is laid between the pedestal 5 and the reaction frame 6.

The reaction frame 6 is provided with a journal jack 7 at a suitable position that extends and contracts rearward, and comes into contact with a reaction wall 8 provided in the shaft 32.

A press-fitting truck 9 is provided on the rail 2 so as to be movable back and forth.
0 has wheels 12 on both front and rear sides and runs on rails 2.

The press-fitting member 11 has a rectangular front face and a narrow rectangular side face, with the front face facing the direction of movement of the press-fitting cart 9.

The center part of the front side of the press-fit member 11 is a contact part for press-fitting the buried pipe 4, and there is a through hole 13 in the center of the contact part. A water supply pipe 14 and a mud drainage pipe 15 for discharging earth and sand excavated at the tip of the ground for burying the ground and for stabilizing the face, and a supply pipe for filler to reduce friction between the burial pipe 4 and the ground. 16 is provided, one of which is connected to the press-fitting member 1.
It protrudes from the top surface of 1.

33 is a groove cut out on the upper side of the press-fit member 11, the bottom of which is deep enough to allow the outer diameter of the buried pipe to be exposed;
This is a trench in which the excavator power supply cable is placed around the outside of the buried pipe.

Further, through holes 17 are bored on the left and right sides of the outside from the abutting portion of the buried pipe 4, and a hook-shaped roller 19 that rotates in the front-rear direction of the pedestal is fixed to the lower end of the hole 17.

In the through hole 17 is a cylinder portion 2 of a press fit jack 22 which is rotatably supported on a bracket 21 with the tip of a rod 20 attached to the front surface of the reaction frame 6.
3 are fitted together to enable movement on the rollers 19.

A flange 24 having a diameter larger than the diameter of the cylinder and larger than the diameter of the through hole 17 is fixed to the tip of the cylinder part 23 on the rod 20 side.
The flange 24 press-fits into the press-fit member 11 due to the elongation of
The press-fitting member 11 moves along the rail together with the cylinder portion 23 while coming into contact with the rear surface.

Further, a ring ring 26 having a pin hole 25 is fixed to the front end face of the cylinder portion 23 with the pin hole 25 positioned above and below.

Brackets 27 and 28 are attached above and below the through hole 17 on the front surface of the press-fitting member 11, and the brackets 27 and 28 have pin holes 2 that pass through them vertically.
9 and 30, and by inserting a pin 31 that matches the pin hole 25 of the jack 22, the cylinder portion 23 and the press-fitting member 11 can be moved as one. In addition, the press-fitting member 11
A receiving member for the buried pipe 4 is attached to the front surface of the pipe.

With the above configuration, the seat 1 is installed on the bottom plate of the shaft 32 at a predetermined height using the adjustment bolts 3. At this time, the pipe support 5 is directed toward the buried position of the buried pipe 4, and the journal jack 7 on the reaction force frame 6 is then extended to bring the receiving material into contact with the reaction wall 8.

The press-fitting truck 9 is brought close to the reaction frame 6, the tip of the rod 20 of the press-fitting jack 22 is supported by the pin on the bracket 21, and the press-fitting member 11 and the cylinder part 2 are
3, the buried pipe 4 is installed on the pipe receiving member in front of the pipe holder 5 and the press-fitting member 11, and each of the mud water supply/discharge pipe and the filler supply pipe inside the buried pipe is connected to the press-fitting member 11. Connect to the pipes 14, 15 for the mud water supply and drainage pipes, the filler supply pipe 16, etc. installed on the
The hydraulic pump is activated to extend the rod 20 of the press-fitting jack 22 (see FIG. 4).

As a result, the flange 24 on the cylinder portion 23 applies force to the press-fitting member 11 .
press-fits the buried pipe 4 (see Fig. 5). As a result, the wheels 12 of the press-fitting member 11 run on the rail 2 together with the cylinder portion 23.

When the rod 20 reaches a predetermined position (the front end position of the cylinder before the start of press fitting), the rod 20 is contracted. As a result, only the cylinder returns to its original position, leaving the press-fitting member 11 intact (see FIG. 6). Next, when the pin holes 29, 30 of the brackets 27, 28 on the press-fitting member 11 are aligned with the pin hole 25 of the ring 26 at the front end of the jack 22, the pin 31 is inserted (see FIG. 7). Furthermore, the jack 22 is operated again to perform the second press fit (see FIG. 8).

Since the extended length of the jack 22 is approximately half the length of the buried pipe 4, this second press-fit will reduce the length of the jack 22.
The press-fitting of the actual buried pipe 4 is completed.

Then, the pin is pulled out and the rod 20 is retracted, and the press-fitting member 11 is manually pushed closer to the reaction frame 6 to return it to its initial position, and then the buried pipe 4 is press-fitted (the first (See Figure 9).

Note that the number of press-fitting jacks 22 need not be two on the left and right, but may be four on the top, bottom, left and right.

(Effects of the invention) According to this invention, the conventional spacer can be eliminated and the rotation space of the spacer can be widely used as the working space of the shaft, so the pipe connection operation is extremely easy, the weight of the device is light, and the The only manual work required to operate the device is to move the pedestal and insert/remove the pins, which can be done easily and improve the efficiency of propulsion work.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with Fig. 1 being a simplified side view of the tube propulsion device, Fig. 2 being a rear view of a portion thereof, and Fig. 3 being a side view of a portion of Fig. 1. , 4th
9 to 9 are simplified plan views for explaining the steps in the construction state, and FIG. 10 is an explanatory diagram of the conventional pipe body propulsion construction method. 1... pedestal, 4... buried pipe, 5... pedestal, 6...
...Reaction force frame, 11...Press-fitting member, 20...
Rod, 22...Jacket, 23...Cylinder part, 24...Flange, 26...Ring.

Claims (1)

[Scope of utility model registration request] A pedestal having a cradle for a buried pipe at the front end and a reaction frame at the rear end, a press-fitting member that runs back and forth on the pedestal, and cylinder parts provided on both sides of the press-fitting member so as to be slidable back and forth. It consists of tajatsuki,
The rod end of the jack is rotatably connected to the reaction frame with a pin or the like, and the rear and front ends of the cylinder part of the jack are alternately connected to the press-fitting member with pins or the like so that the jack can be mounted on the pedestal. A pipe body propulsion device characterized in that the press-fitting member is moved back and forth to press the buried pipe at the center of the front surface of the press-fitting member.