JPH10159497A - Suction structure of vacuum erector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suck and hold a box type segment, by connecting a plurality of suction boards by connecting members arranged so as to stride over the ribs of the box type segment. SOLUTION: A plurality of suction boards 40 are connected to each other by a connecting member 30 so as to stride over the ribs 13 of a box-type segment such as a steel segment to constitute the suction structure of a vacuum erector 20. Respective suction boards 40 are held by sucking a skin plate 14 divided by the ribs 13. And hoses are attached to respective suction boards 40 to independently enable suction of the skin plate. Even if some of suction boards are broken, the segment can be held by other suction boards 40. The suction boards are connected by the connecting member 30 so as not to rotate through the connecting parts 50 and also so as to vertically slide a little and the connecting member 30 is arranged close to the skin plate 14. And notches striding over the ribs are provided in the connecting members 30 so that the suction board 40 sticks closely to the skin plate 14 without troubles on sucking the skin plate. In this way, the segment with ribs can be securely sucked and safety can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum erector for a box-shaped segment in a shield tunneling method.

[0002]

2. Description of the Related Art Conventionally, in a shield tunnel construction method,
As shown in FIG. 6 to FIG. 8, the concrete segment a
Was held by suction to assemble the segments.

[0003] However, unlike the concrete segment a, the box-shaped segment cannot use the conventional vacuum erector b for the concrete segment.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vacuum erector suction structure suitable for a box-shaped segment.

[0005]

SUMMARY OF THE INVENTION The present invention provides a vacuum elector suction structure for assembling a box-shaped segment of a shield method, comprising a plurality of suction plates for holding the segments by suction and a connecting member for connecting the suction plates. Wherein the connecting material is arranged so as to straddle the ribs of the box-shaped segment. A vacuum elector suction structure, or in the vacuum elector suction structure, wherein the suction plate and the connecting member are slidably connected to each other. It has an adsorption structure.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. <A> Box-shaped segment The box-shaped segment is a box-shaped segment having a rib inside. For example, the steel segment 10 has a shape as shown in FIG. Steel segment 10
The main girder 11 and the joint plate 12 are arranged on the four sides of the skin plate 14, and the ribs 13 are arranged inside for reinforcement. Main girder 1
1 and the joint plate 12 have joint bolt holes 15.

[0007] When the vacuum plate 20 adsorbs the skin plate 14 of the steel segment 10 in a vacuum, it is necessary to avoid the rib 13 and firmly grip it.
In the case of another box-shaped segment, a portion corresponding to the skin plate 14, for example, a back plate is sucked.

<B> Suction Structure of Vacuum Elector The suction structure of the vacuum elector 20 has a plurality of suction plates 40 as shown in FIG. 2, for example. Adsorb. The plurality of suction plates 40 are connected by the connecting member 30 so as to straddle the rib 13.

<C> Suction Plate The suction plate 40 may be divided according to the number of ribs 13.
For example, when three ribs 13 are provided, providing four suction plates 40 can provide a sufficient suction force.

A pad 41 is attached to seal the suction plate 40 and the segment 10. In order to attach the pad 41, a bank 42 that is high around the suction surface, for example, about 6 to 7 mm high is provided. Pad 4 around the inside of the bank 42
Attach 1. The pad 41 uses a deformable substance, for example, hard rubber.

A hose 60 is attached to a suction part of the suction plate 40, and is connected to a vacuum pump via a reservoir tank. A check valve 61 is provided at the connection between the back surface of each suction plate 40 and the hose 60.

The check valve 61 has the function of operating the check valve to cut off the circuit even when the pad 41 is worn and air enters the suction plate 40 and the degree of vacuum is reduced.

A hose 60 is attached to each suction plate 40 and can be sucked independently. Thus, even if there is a failure in suction of some of the suction plates 40, the segments 10 can be held by the other suction plates 40.

For example, the hose 60 branches and the suction plates 40
When a check valve is placed on each branch hose,
Even if a vacuum leak occurs in a certain suction plate 40, suction can be continued in another suction plate 40 by shutting off the check valve 61.

<D> Connecting material The connecting material 30 connects the suction plates 40 and is connected so that the suction plates 40 do not rotate. For example, the connection materials 50 are connected at two connecting portions 50.

The connecting portion 50 connects the suction plate 40 so as to be slightly slidable up and down by a pin and a long hole or a spring.

The connecting member 30 has a structure that straddles the ribs 13 and has, for example, a notch 31. Notch 31
When the adsorbing plate 40 is sucked, the notch 31
Contact the ribs and have a size that does not shift.

<E> Method of Using Vacuum Elector Each suction plate 40 of the vacuum elector 20 comes into contact with the skin plate 14 partitioned by the rib 13 and sucks the skin plate 14 by suction of a vacuum pump.

At this time, the connecting portion 50 slides up and down, and the suction plate 40 slides according to the shape of the skin plate 14,
Adhere to skin plate 14. Furthermore, the adhesion between the skin plate 14 and the skin plate 14 can be enhanced by the elasticity of the pad 41.

[0020]

According to the present invention, the following effects can be obtained. <A> Even if there is a rib like a steel segment, it can be surely adsorbed. <B> By providing a cutout in the joining material, it can function as a stopper against lateral displacement, and can hold the segment safely. <C> Since a plurality of suction plates are provided and suction is possible independently, even if a failure occurs in one suction plate, suction can be performed with another suction plate, and safety can be improved. . <D> The present invention can be applied to a concrete segment having a smooth inner surface as shown in FIG.

[Brief description of the drawings]

FIG. 1 is a perspective view of a steel segment.

Fig. 2 Adsorption diagram of steel segment by vacuum erector

FIG. 3 is a connection diagram of a suction plate using a connecting material.

FIG. 4 is a connection diagram of a suction plate from a suction surface.

FIG. 5 is an enlarged view of a suction plate.

FIG. 6 is a perspective view of a concrete segment.

FIG. 7 is an adsorption diagram of a concrete segment by a vacuum elector.

FIG. 8 is a layout diagram of pads of a concrete segment.

[Explanation of symbols]

 10 ・ Steel segment 13 ・ Rib 14 ・ Skin plate 20 ・ ・ Vacuum electa 30 ・ ・ Bonding material 31 ・ ・ Notch 40 ・ ・ Suction plate 41 ・ ・ Pad 42 ・ ・ Bank 50 ・ ・ Connecting part 60 ・ ・Hose 61 ・ ・ Check valve

Claims (3)

[Claims] In a vacuum elector suction structure for assembling a box-shaped segment by a shield method, a plurality of suction plates for holding the segment by suction and a connecting material for connecting the suction plates are provided. A suction structure for a vacuum elector, wherein the suction structure is arranged so as to straddle a rib of a segment. 2. The suction structure of a vacuum elector according to claim 1, wherein each suction plate can be suctioned independently. 3. The suction structure for a vacuum elector according to claim 1, wherein the suction plate and the connecting member are slidably connected to each other.