JP2789081B2 - Middle pressing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sewer pipe, a water pipe,
BACKGROUND OF THE INVENTION The present invention relates to an intermediate push device for propelling and embedding gas or a sheath tube of a conduit tube in the ground, and more particularly to an intermediate push device for easily and safely installing and removing an intermediate push jack.

[0002]

2. Description of the Related Art Conventionally, in the propulsion method, the propulsion force increases as the propulsion extension lengthens, and it becomes difficult to perform the propulsion work only with the main pushing device. A method of distributing the propulsion force by installing a middle push device equipped with a is used.

In the case of propulsion construction, the propulsion force varies depending on the propulsion distance, the buried pipe diameter, and the soil conditions, and the number and size of the central push jacks also vary. Normal weight is 30kg-20 per bottle
A 0 kg middle push jack was used, and installation or removal on the middle push wheel was performed manually by one or more persons.

Since the method of attaching the center press jack to the center press connecting wheel can be performed on the ground, the center press connecting wheel is rotated so that the center press jack can be installed below, and one by one is sequentially turned downward. The mounting method has been done. When removing the central push jack, it is impossible to rotate the central push connecting wheel because it is buried in the ground, and it has been removed inside the buried pipe while being arranged in the circumferential direction .

[0005]

According to the above-mentioned prior art, the center push jack is installed and removed from the center push joint wheel, but has the following problems. If the diameter of the buried pipe is small, the work space becomes narrower, and when removing the upper central push jack in the intermediate push wheel, the heavy central push jack is supported by one person with the middle waist posture until the middle push jack fastener is removed. It has to be the worst working condition for hard work. Or, if the diameter of the buried pipe is large, it can be supported by multiple people, but it will be in an unstable posture, such as riding on a table in a place with poor scaffolding inside the buried pipe, and accidents of workers due to falling of the middle push jack etc. Many have occurred.

[0006]

In the long-distance propulsion method according to the present invention, in order to disperse a large propulsive force applied to the main pushing device, a middle pushing joint having a diameter substantially equal to the outer diameter of the buried pipe is provided at a joint portion of the buried pipe. A middle press device equipped with a plurality of middle press jacks fitted with a ring and arranged uniformly in the circumferential direction of the inner periphery of the middle press connecting wheel, so as to abut against end faces of the front and rear buried pipes. A guide rail, which is installed in a ring shape so as to abut the inner side surface of the center push jack main body installed on the connecting wheel, is fixed by a plurality of guide rail holding brackets.

As a material for the guide rail, a relatively strong steel material is used to hold the middle push jack. As the installation position of the guide rail, in the state where the middle push jack is mounted on the middle push joint wheel, it is installed in an annular shape so as to abut the inner side surface of the middle push jack main body, and the lower part takes in and out of the middle push jack For this purpose, a slit is provided.

As the guide rail holding metal, a steel material is used to firmly fix the guide rail, and is fixed to a plate or the like which does not move in the intermediate pressing device.

As the material of the traction member, a wire or a rope generally used can be used. The method of towing may be by human power, but can be efficiently performed by using the towing equipment installed in the starting shaft.

[0010]

According to the above-mentioned invention, the middle push jack is installed by inserting the middle push jack from the slit below the guide rail, tying the middle push jack with the traction material, and then pulling the traction material. The jack is raised to a predetermined position along the guide rail and is installed. In addition, at the time of removal, by loosening the traction material from the lower middle push jack, it is carried downward along the guide rail,
It is taken out from the slit of the lower guide rail. In this way, the work of directly lifting or lowering the middle push jack by human power is eliminated, and safe and efficient construction can be performed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on one embodiment. FIG. 1 is a longitudinal sectional view for explaining a center pressing device of the present invention. The middle push device 1 is installed between the buried pipe 12 and the middle push pipe 13. On the outer peripheral portion of the middle press device 1, a middle press connecting wheel 2 that supports the middle press jack 4 is fitted to the buried pipe 12 and the middle press pipe 13. The middle push jack 4 is bolted and nut 9
And is fixed to the middle pushing wheel 2.

At the rear end of the buried pipe 12, an abutment plate 3 for evenly dispersing the propulsive force of the center push jack 4 is installed. The guide rail 6 is formed in an annular shape so as to contact the inner surface of the push jack 4.
Is installed. The guide rails 6 are connected by a plurality of guide rail holding brackets 7, and one end of the guide rail holding bracket 7 is fixed to the abutment plate 3. A slit is provided below the guide rail 6 to allow the middle push jack 4 to enter and exit. The number of the guide rails 6 was set to one or more because the balance of the middle push jack 4 becomes unstable when the guide rail 6 is slid when installing and removing the middle push jack 4 with one piece. Is more preferred.

Next, a method for installing and removing the apparatus according to the present invention will be described with reference to FIG. The middle push jack 4 is installed by attaching a metal fitting or the like to the middle push jack 4 and hooking the traction material 11 or tying the traction material 11 to the middle push jack 4 to provide the traction provided on the top of the middle push connecting wheel 2. The traction member 11 is pulled through the piercing member 10 by the traction device, the middle press jack 4 is slid along the guide rail 6, and mounting work is sequentially performed from the upper middle press jack 4 by the jack stopper 8.

When the construction is completed to the reaching shaft position and the middle push jack 4 is to be removed, the traction member 11 is tied to the lower middle push jack 4 and the traction member 11 is loosened, so that the traction member 11 is loosened along the guide rail 6. Slide down and remove from slit. As described above, the removal is performed sequentially from below to above.

[0015]

As described above, according to the intermediate pressing device of the present invention, the use of the guide rail allows direct lifting or lowering in an unstable posture by human power as in the prior art. The installation and removal work of the center push jack can be performed efficiently and safely even without it, reducing the number of worker accidents due to the fall of the center push jack and improving safety.

In addition, since the guide rail is installed and the work of pulling the middle push jack up and down with the traction material can be easily performed, the time for installation and removal work can be shortened.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view for explaining a center pressing device of the present invention.

FIG. 2 is a cross-sectional view illustrating the installation state of the center pressing device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Middle press device 2 Middle press wheel 3 Middle plate 4 Middle plate Jack 5 Main wheel 6 Guide rail 7 Guide rail holding bracket 8 Jack stopper 9 Bolt / Nut 10 Towing material passing bracket 11 Towing material 12 Buried pipe 13 Middle pressing pipe

Claims (1)

(57) [Claims] In a long-distance propulsion method, in order to disperse a large propulsive force applied to a main pushing device, a middle pushing ring having a diameter substantially equal to the outer diameter of the buried pipe is fitted to a joint portion of the buried pipe. A middle pressing device equipped with a plurality of middle pressing jacks arranged evenly in the circumferential direction of the inner press connecting wheel inner periphery, the main pressing device being installed on the front and rear buried pipe end faces, being installed on the center pressing connecting wheel. A center pressing device, wherein a guide rail installed in an annular shape so as to contact an inner side surface of the center pressing jack body is fixed with a plurality of guide rail holding brackets.