JPS6033199Y2 - Erector piping system for shield excavator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an erector piping device for a shield tunneling machine.

Shield tunneling machines are widely used as the safest tunneling machines when constructing tunnels in soft ground, especially in water-logged sand and gravel layers, and are designed to apply a lining to the tunnel as the excavation progresses. ing.

This lining is assembled by, for example, a plurality of rings formed by joining six lining segments into a circular, horseshoe, etc. shape, and then abutting them in series in the axial direction using backfilling material. The segments are joined by an erector installed inside the main body of the seal excavator.

FIGS. 1 and 2 show a conventional erector of this kind. This is briefly explained in the figures. 1 is a cylindrical shield tunneling machine main body, and 2 is the shield tunneling machine main body 1. A plurality of rollers fixed to the inner wall of the erector ring 3 are rotatably supported by these rollers 2. A support 4 is disposed on the opposite surface 3a, and a pair of left and right hydraulic cylinders 6 for assembling the lining 5 shown in chain lines in FIG. 1 are disposed on the support 4.

Reference numeral 7 denotes a flexible tube made of a rubber hose or the like for supplying hydraulic pressure to drive each of the hydraulic cylinders 6, and is piped along the inner wall of the shield tunneling machine main body 1.

In this piping, in order to enable the rotation of the erecter ring 3, the erecter ring 3 portion of the flexible tube 7 is provided with an extra length 7A by hanging down long, and each upper end of the erecter ring 3 is fixed to the ring support member 10. and a rubber hose joint 9 fixed to the erector ring 3, respectively.

The ring support member 10 is formed into an annular shape and is disposed on the front side of the erector ring 3, and its peripheral edge is fixed to the shield excavator main body 1.

By the way, in the piping of the flexible tube 7 as described above, when the erector ring 3 is rotated, a belt conveyor (not shown) installed passing through the erector ring 3 becomes an obstacle and becomes an obstacle. Since the long part 7A hits, it is difficult to operate the erector smoothly, and if the extra long part 7A wraps around an obstacle, damage to the flexible pipe 7, cutting accidents, etc. may occur, which will seriously hinder excavation work. There was this inconvenience.

The present invention was developed in view of the above-mentioned points, and is an extremely effective method in which the extra length of the flexible tube or electric wire is provided along the axial direction of the shield excavator main body, and this is stretched using an automatic tensioning device. An erector piping device for a shield excavator that has a simple configuration that eliminates slack in the excess length, absorbs changes in the length of the excess length, and prevents winding of flexible tubes or electric wires, cutting accidents, etc. It provides:

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 3 is a sectional view of a main part of the main body of a shield tunneling machine equipped with an erector piping device according to the present invention, and FIG. 4 is a sectional view taken along the line ■-■ in FIG. 3.

Components in the drawings that are the same as those in FIGS. 1 and 2 are designated by the same reference numerals, and their explanations will be omitted.

In these figures, reference numeral 20 denotes an automatic tensioning device, and this automatic tensioning device 20 includes a wire reel 21 disposed on the ceiling of the shield tunneling machine main body 1 and in front of the erector ring 3, and By applying a rotational force in the direction of the arrow to the pulley 22 connected to the wire 21 via the wire 23 and the wire reel 21, the wire 2
Apply a certain tension to erect ring 3 and pulley 22 to erect ring 3.
The erector ring 3 is composed of a motor that is pulled in a direction away from the main body 1, that is, in front of the shield excavator main body 1, a tension applying means 24 such as a spiral spring, and a hose reel 25 fixed to the rear surface of the erector ring 3.

A hose guide 26 is fixed to the ceiling surface of the shield tunneling machine main body 1 in correspondence with the hose reel 25.

One end of the flexible tube 7 is connected to a not-shown hydraulic motor (hydraulic pump), and the other end of the flexible tube 7 for supplying hydraulic pressure to the hydraulic cylinder 6 is connected to one end of a rubber hose joint 8 fixed to the ring support member 10.

One end of the extra length portion 7A of the flexible tube 7 is connected to the other end of the rubber hose joint 8, and the middle portion is guided forward along the inner wall of the shield excavator main body 1 and hung on the pulley 22. After that, it is guided rearward again and bent downward through the ring support member 10 and the hose guide 26, and the other end is connected to one end of the rubber hose joint 9 fixed to the erector ring 3.

Therefore, tension is applied to the extra length portion 7A by the automatic tensioning device 20 to prevent sagging.

Further, the extra length portion 7A has a circumferential length corresponding to the necessary rotation angle of the erector ring 3, and the wire 23 and wire reel 25 have a winding capacity of more than half of that length.

One end of a steel pipe 27 is connected to the other end of the rubber hose joint 9, and the other end of this steel pipe 27 is connected to the hydraulic cylinder 6.
It is connected to the.

Therefore, the hydraulic pressure from the hydraulic pump is guided to the hydraulic cylinder 6 via the flexible tube 7, the extra length 7A, and the steel tube 27.

In such a configuration, when the erector ring 3 rotates as the lining is assembled, the extra length 7A is wound around the hose reel 25 and pulled.

At this time, the pulley 22 moves in the direction of the erector ring 3 while maintaining a constant tension, thereby preventing the extra length portion 7A from being cut.

Conversely, when the erector ring 3 reverses and returns to its original position, the extra length 7A wound around the hose reel 25 tries to loosen, but the pulley 22 pulls it to the left in Figure 3 with constant tension. It returns to its original state without any slack.

Therefore, the extra length part 7A does not get caught or wrapped around other equipment in the shield tunneling machine main body 1, and damage to the extra length part 7A, cutting accidents, etc. can be prevented, and the erector can be moved smoothly. You can operate it.

Although the above embodiment has been described with respect to a hydraulically driven erector, the present invention is not limited to this in any way, and can be applied to various types of erectors such as a ring gear type, a rack and pinion type, etc. driven by a motor. In that case, an extra length similar to the above embodiment is provided when wiring the electric wire for supplying power instead of the flexible tube, and the automatic tensioning device 2.
It is obvious that the tension should be set to 0.

As explained above, according to the erector piping device of the shield excavator according to the embodiment, there is an extra length in the flexible pipe or electric wire that supplies hydraulic pressure or electric power to operate the hydraulic device etc. attached to the erector ring. The extra length is constructed by applying a constant tension to the extra length using an automatic tensioning device, thereby eliminating slack in the extra length and absorbing changes in the length of the extra length due to the rotation of the erector ring. be able to.

Therefore, the flexible pipes or electric wires do not come into contact with or become wrapped around other equipment, etc., thereby preventing damage and disconnection accidents, and allowing the excavation work to be carried out efficiently without the risk of interfering with the operation of the erector. I can do it.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a part of the erector in a conventional shield tunneling machine, Figure 2 is a cross-sectional view taken along the line I-I in Figure 1, and Figure 3 is the main body of the shield tunneling machine equipped with the erector piping device according to the present invention. FIG. 4 is a sectional view taken along the line ■-■ in FIG. 1... Shield excavator body, 3... Erector ring, 6... Hydraulic cylinder, 7...
...Flexible tube, 7A...Extra length, 20...
・・・Automatic tensioning device, 21・Curved wire reel, 22
...Pulley, 23 ...Wire, 24.
...Tension adding means, 25...Hose reel.

Claims (1)

[Scope of utility model registration request] A flexible tube or electric wire that supplies hydraulic pressure or electric power to operate a hydraulic device or the like that is piped or wired with an extra length and is attached to an erector ring, and a flexible tube or electric wire that has an extra length to eliminate slack in the extra length and the erector. - an automatic tensioning device that absorbs changes in the length of the extra length portion caused by rotation of the ring; the automatic tensioning device is fixed to the erector ring and changes as the ring rotates; It is characterized by comprising a hose reel around which the extra length is wound, and a pulley that is movable and constantly applies a constant tension in a direction away from the erector ring, and around which the extra length is stretched. Erector piping device for shield tunneling machine.