JPH0522699U - Segment cotter type coupling device - Google Patents

Abstract

(57) [Abstract] [Purpose] The joint fittings are not exposed on the inner surface of the tunnel, and the joint surfaces around the segments are in close contact with each other over the entire length to ensure assembly and waterproofing. [Structure] The outer surface of the lip 2a is exposed and embedded along the front-rear direction of both side surfaces of the segment 1 and the arc direction of the front-rear surface, and the lip 2a is provided at a plurality of locations on the inner surface of the lip 2a from the front end to the rear end in the cotter insertion direction. The tapered surfaces 3a and 3b are formed so as to be inclined in a direction away from the outer surface, and the tapered surface 3a located at the back has a width w from the outer surface of the lip 2a at the front end thereof.
s is set to be equal to or larger than the width wl of the outer surface of the lip at the rear end of the tapered surface 3b in the front of the cotter insertion direction, and the cotter bracket 2 having a lip groove type cross section, and the cotter brackets 2 and 2 A cotter formed into an H-shaped cross-section that can be inserted into the lip 2a in an abutted state on the outer surface thereof, and formed with tapered surfaces 5a and 5b corresponding to the tapered surfaces 3a and 3b on the inner surfaces of the fastening flanges 4b and 4b. It is characterized by consisting of 4, 4 '.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cotter type joint device for a segment used for lining a shield tunnel.

[0002]

[Prior Art]

 Conventionally, a method of fastening with bolts and nuts is often used as a fastening means for assembling segments, but there are disadvantages such as complicated bolt insertion and nut fastening work.

Therefore, in recent years, a highly rigid cotter type joint, which is fastened by inserting an H-shaped cotter into a lip groove type cotter receiving fitting, is becoming popular.

[0004]

[Problems to be solved by the device]

 In the above conventional cotter joint, the cotter brackets are embedded along both sides and front and rear surfaces of the segment along the plate thickness direction, and the cotters are inserted from the inside surface of the tunnel to the outside surface for fastening. The end of the tunnel is exposed on the inner surface of the tunnel, and its corrosion impairs the aesthetics of the inner surface of the tunnel, and there is a gap between the cotter bracket and the cotter. It was.

[0005]

[Means for Solving the Problems]

 This invention is embedded by exposing the outer surface of the lip 2a along the front-rear direction of both side surfaces of the segment 1 and the arc direction of the front-rear surface, and at a plurality of locations on the inner surface of the lip 2a from the front end to the rear end in the cotter insertion direction. 2a forms taper surfaces 3a and 3b inclined in a direction away from the outer surface, and the taper surface 3a located at the back has a width ws with the outer surface of the lip 2a at the front end of the taper surface 3b located in the front in the cotter insertion direction. The cotter bracket 2 having a lip groove type cross-section, which is set to be equal to or larger than the width wl of the outer surface of the lip at the rear end, and the cotter brackets 2 and 2 are butted against each other on the outer surface of the lip 2a. It is formed into a H-shaped cross section that can be inserted into the inside, and has a tapered surface 5a, 5b corresponding to each tapered surface 3a, 3b formed on the inner surface of the fastening flange 4b, 4b. It proposes a cotter-type coupling device of a segment consisting of a over 4,4 '.

[0006]

[Action]

 The segments 1 and 1 are joined in the tunnel axis direction and the ring direction, and the cotter 4 to the cotter 4'which are fitted to the taper surfaces 3a and 3a located in the inner part of the cotter insertion direction on the cotter brackets 2 and 2 which are in contact with each other. Insert in order and fasten with the respective tapered surfaces 3a, 3b.

At this time, the width ws of the tapered surface 3a located at the back of the cotter brackets 2 and 2 with the outer surface of the lip 2a at the front end of the lip 2a at the rear end of the tapered surface 3b located in the front in the cotter insertion direction. Since the width wl with the outer surface is set to be equal to or larger than the width wl, the cotter 4 fitted to the taper 3a surface located at the inner portion can be inserted through the taper surface 3b in front of it.

When the segments 1 are fastened with the cotters 4 and 4'in this manner, the joint fitting is not exposed on the inner surface of the tunnel, and the joint surfaces around the segment 1 are in close contact with each other over the entire length, A sealing material or the like can be preliminarily attached to the upper and lower joint surfaces of each cotter bracket 2 to stop water at the same time as assembling.

[0009]

【Example】

 Outer surfaces of the lips 2a, 2a in which cotter brackets 2 of lip groove type cross section are vertically opposed to each other at a required interval along the arc direction at the front-rear direction of both side surfaces of the segment 1 and the widthwise central portion of the front-rear surface. Is exposed and buried.

The lip 2a has a taper surface 3a inclined at a plurality of locations (two locations in the illustrated example) on the inner surface in a direction away from the outer surface of the lip 2a from the front end to the rear end in the cotter insertion direction indicated by the arrow in FIG. , 3b are formed, and the width ws of the taper surface 3a located at the back with the outer surface of the lip 2a at the front end is the width wl with the outer surface of the lip 2a at the rear end of the taper surface 3b located in the front in the cotter insertion direction. It is set equal or large.

The cotters 4, 4 ′ are formed in an H-shaped cross section that can be inserted into the cotter receiving metal fittings 2, 2 in a state where the cotter receiving metal fittings 2, 2 are butted against each other on the outer surfaces of the lips 2 a, 2 a. On the inner surfaces of the fastening flanges 4b, 4b, there are taper surfaces 5a, 5b whose widths from the center of the web 4a are set to be substantially equal to the widths of the respective taper surfaces 3a, 3b of the cotter bracket 2 and the outer surface of the lip 2a. Therefore, the cotter 4 is formed such that the distance between the left and right tapered surfaces 5a, 5a is wider and the cotter 4'is wider than the distance between the left and right tapered surfaces 5b, 5b.

In the above structure, when assembling the segments, the segments 1 and 1 are joined in the ring direction, and the cotter brackets 2 and 2 that are opposed to each other on the left and right sides are fitted to the tapered surface 3a located at the inner part in the cotter insertion direction. Insert the mating cotter 4 first, and then fasten the fastening flanges 4b, 4b to the left and right tapered surfaces 3a, 3a to fasten them, and then insert the cotter 4'and fasten the fastening flanges 4b, 4b to the left and right. The taper surfaces 3b, 3b are fitted and fastened.

In this case, the cotter 4 fitted to the taper surface 3a located at the back can be inserted without difficulty by passing through the narrow taper surfaces 3b and 3b in the front side when the cotter 4 is inserted.

After assembling the preceding ring in this manner, the segment 1 of the preceding ring is joined to the segment 1 of the succeeding ring, and the cotter 4 is attached to the cotter brackets 2 and 2 which are opposed to each other in the same manner as above. , 4 ′ are sequentially inserted, and the tapered surfaces 3a, 3a and the tapered surfaces 3b, 3b are fitted and fastened. Further, the segments 1, 1 in the ring direction are fastened similarly.

It should be noted that a suitable sealing material or the like is attached to the joint surfaces of the upper and lower segments 1 of the cotter bracket 2 to stop water.

[0016]

[Effect of the device]

 As described above, according to the present invention, the cotter bracket is provided between the joint surfaces of the segments, the joint bracket is not exposed on the inner surface of the tunnel, and the inner surface of the tunnel can be finished with a good appearance and the surroundings of the segment. The joint surfaces of the cotters are in close contact with each other over the entire length, and sealing materials, etc. are attached to the upper and lower joint surfaces of each cotter bracket in advance to ensure the waterproofness at the same time as assembling.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing a state where segments are assembled by the joint device of the present invention.

FIG. 2 is a side view of a segment according to the present invention.

FIG. 3 is a cross-sectional plan view of the cotter bracket according to the present invention.

FIG. 4 is a vertical sectional front view showing a fastening state of the joint device of the present invention.

FIG. 5 is a plan view showing a state where segments are assembled by the joint device of the present invention.

[Explanation of symbols]

 1 segment 2 cotter bracket 2a lip 2b lip 3a taper surface 3b taper surface 4 cotter 4'cotter 4a web 4b fastening flange 5a taper surface 5b taper surface

Claims (1)

[Scope of utility model registration request] 1. A lip outer surface is exposed and embedded along the front-rear direction of both side surfaces of a segment and the arc direction of the front-rear surface,
A taper surface inclined from the front end to the rear end in the cotter insertion direction in a direction away from the lip outer surface is formed at a plurality of positions on the inner surface of the lip, and the width of each taper surface with the lip outer surface at the front end is in front of the cotter insertion direction. A cotter bracket having a lip groove type cross-section that is set to be equal to or larger than the width of the outer lip surface at the rear end of the tapered surface, and a cross section that can be inserted into the cotter bracket when the cotter brackets are butted against each other on the lip outer surface. A cotter type joint device for a segment, comprising a cotter formed in an H shape and having a tapered surface corresponding to each of the tapered surfaces formed on the inner surface of the fastening flange.