JP2001140590A - Segment joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment joint device absorbing the error of a connection position, having a simple joint shape, and having high connection strength. SOLUTION: This joint device is constituted of a female connecting member 20 provided on one segment 1 and a male connecting member 10 provided on the other segment 1. The male connecting member 10 is constituted of a first rod-like member 11 and a locking bolt 12 screwed and fastened with a screw section 16 to the first rod-like member 11, the outer end section 14 of the locking bolt 12 is formed into a taper shape at the tip, and an annular groove section is formed at the intermediate section. The female connecting member 20 is constituted of a second rod-like member 21 buried in the segment 1, a ring 30 arranged in a hole section bored on the second rod-like member 21, a plurality of pin hold sections 23 provided on the outer periphery of the second rod-like member 21, and a pin 29 excited by the inner hole elastic material 27 of the pin hold section 23. When the outer end section 14 is inserted into the hole section of the second rod-like member 21, the ring 30 blocking the annular groove section with the tip of the outer end section 14 is thrust to the depth of the hole section, and the pin 29 is inserted into the annular groove section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint device for joining two adjacent segments covering a borehole excavated by a shield machine when a tunnel is constructed by a shield method.

[0002]

2. Description of the Related Art In order to prevent a drilling hole excavated by a shield machine from collapsing, usually, a plurality of segments divided in a circumferential direction are assembled in a ring shape by a circumferential joint to cover the drilling hole. In this way, the segment assembled in a ring shape along with the construction is joined to the ring segment installed immediately before by an axial joint in the axial direction to overlap the width of the ring and advance the tunnel.

[0003] For joining by the axial joint, conventionally, a method of fastening opposed steel plates with holes with bolts and nuts has been used in many cases. However, in this method, a large amount of manpower and time are required for joining the rings between the segments, and there is a variation in bolt tightening and a variation in joining quality.

[0004] As a method of improving the above-mentioned tightening and joining of bolts and nuts by hand, for example, Japanese Patent Application Laid-Open No. 7-25 / 1995
Japanese Patent Publication No. 320 proposes a technique in which a projecting pin is buried in one joining end face in the circumferential joining of the segments, and a fitting member for fitting the tip of the pin is buried in the other end face, and one-touch joining is performed. ing. And it proposes that this technique is not limited to circumferential joining. This method is easy to join, but has a disadvantage that the tensile strength in the axial direction is insufficient due to the joint originally developed for the circumferential joint.

In Japanese Patent Application Laid-Open No. Hei 8-210095, a male connecting member is attached to one of the segments, and a female connecting member is attached to the other of the segments so that the male connecting member is prevented from falling off by fitting. A technology has been proposed in which the segment buried portion is covered with an elastic material to allow radial displacement and absorb errors in the connection position. This method has a drawback in that it uses a number of high-precision parts and is difficult to mount on a segment. JP-A-10-205289 discloses that
A male connecting rod is attached to one of the segments, a female engaging cylinder is attached to the other, and the outer periphery of the engaging cylinder is supported by a rubber ring.
We have proposed a technology that can easily join even if the center axis of the joint is shifted. Although this method is easy to join, there is a concern that the joining force may be reduced or separated due to deterioration of the rubber during long-term use.

The applicant of the present invention has disclosed in Japanese Patent Application No. Hei 10-329140 a male pin provided on one side of a segment having a drop groove in a protruding part and a buried part covered with a rubber tube, and an inner hole in the other part of the segment. A technique is proposed in which a female bar having a split ring supported by an elastic material is buried therein, and the quarter ring is inserted into a dropping groove by inserting a male rod to prevent the ring from falling out. Further, in Japanese Patent Application No. Hei 11-088019, a protruding pin of a male fitting is attached to one of the segments, and a ring-shaped mild steel pipe having an inner diameter smaller than the pin and an outer diameter smaller than the inner diameter of the female fitting is attached to the female fitting of the other segment. A joint is proposed in which insertion of a pin absorbs misalignment errors due to loose movement of the mild steel pipe in the radial direction, and prevents the detachment of the mild steel pipe by expanding joints. The above-described invention of the present applicant absorbs errors in the connection position, has a simple joint shape, and has high joining strength. However, as a result of subsequent research, it has been possible to develop and propose joints with higher joint strength and no deterioration.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a joint device of a segment which absorbs an error in a connecting position, has a simple joint shape, and has a high joint strength.

[0008]

A segment coupling device according to the present invention is a segment coupling device for joining two adjacent segments, the female coupling member provided on one of the segments and the female coupling member. And a male connecting member provided on the other segment, the outer end of which is fitted into and joined to the other segment. The male connecting member is provided with a first rod-shaped member embedded in the segment and a member protruding from the segment end face. A locking bolt, an outer end of the locking bolt having a tapered tip and an annular groove formed in an intermediate portion, and the female connecting member is embedded in a second segment.
A ring member slidably disposed in a hole formed in the second rod member at an axial center thereof; and a plurality of pin holding portions provided on an outer periphery of the second rod member. A pin urged by an elastic material so as to be slidable inward in the radial direction in the inner hole of the pin holding portion, and when the outer end is fitted into the hole of the second rod-shaped member, The ring, which has closed the annular groove at the tip of the outer end, is pushed into the inside of the hole, and the pin fits into the annular groove.

The locking bolt has a threaded portion screwed into the first rod-shaped member.

When the male rod of the male connecting member provided on one segment is fitted into the hole of the female connecting member provided on the other segment by the above-described segment coupling device of the present invention, the female The pin of the mold connecting member is fitted into the annular groove of the male rod portion to fix the joint in the front-rear direction and join. The joints do not disengage because the pins resist the pulling force on the segment. And since the locking bolt is screwed to the first rod-shaped member, it can be attached on site, and by removing and transporting it, it is possible to prevent problems such as bending that occur during transportation.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which adjacent segments 1 to be joined are joined in the axial direction by a joint device 3 with joining end faces 1f and 1m in contact with each other. As shown in FIG. 5, the joint device 3 for the segment includes a male connecting member 1 attached to one of the segments.
0 and a female connecting member 20 attached to the other.

As shown in FIGS. 5 and 2, the male connecting member 10 has a first rod-shaped member 11 buried in the end face 1m side parallel to the axis C, and is mounted on the rod-shaped member 11. And a locking bolt 12. First rod-shaped member 1
1 is provided with an inner screw 11a at the axis Cx and a locking bolt 12
The end face 11b is embedded so as to be flush with the end face 1m of the segment. The locking bolt 12 is formed such that a male rod portion 14 at the outer end having a tapered portion 17 formed at the tip protrudes from the end surface 11b, and a male screw portion 16 is screwed to the inner screw 11a.
An annular groove 15 is formed in the middle of the male rod 14, and a pin 29 described later is fitted into the annular groove 15 to join the adjacent segments 1 and 1.

As shown in FIG. 3 and FIG. 4, which is a front view taken in the direction of the arrow X, the female connecting member 20 has a second rod-shaped member 21 embedded in one end face 1f of the segment parallel to the axis C.
A plurality of pin holders 23 provided on an outer periphery near an end of the second rod-shaped member 21; a pin 29 slidably inserted in the holder 23 radially inward; And a ring 30 fitted in the hole 21a.

The second rod-shaped member 21 has an inner hole 2
1a is formed so that the male rod portion 14 of the locking bolt 12 can be fitted therein. A chamfer 21b is provided at the entrance of the inner hole 21a, and is formed so as to perform a function of insertion guide. On the outer periphery of the second rod-shaped member 21, a plurality of
In the illustrated example, four pin holding portions 23 are fixed,
A pin hole 21d through which the pin 29 communicates with the inner hole 21a is provided. The pin holding portion 23 includes a pin holding ring 26 and a coil spring 2 made of an elastic material that presses the pin 29 with the inner diameter of the holding ring 26.
7 and a stopper 25 for pressing the coil spring 27.

Before the segment 1 is joined as shown in FIG. 1, the pin 29 is pressed in the axial direction by the coil spring 27 with its inner end in contact with the outer peripheral surface of the ring 30 as shown in FIG. I have. The ring 30 is formed in such a size that the outer diameter is firmly fitted to the inner diameter of the hole 21a.
Prior to joining, the pin 29 is supported on the outer periphery, and is formed so as to slide toward the inner part of the hole 21a by the fitting of the male rod part 14. FIG. 5 and FIG. 6 on the side thereof show that the male connecting member 10 and the female connecting member 20
2 shows a state in which the camera is mounted.

The segment coupling device 3 having the above configuration
The method of joining adjacent segments 1 and 1 will be described with reference to FIGS. Generally, the segment 1 of FIGS. 5 and 6 is joined to the existing segment 1.
Here, for the sake of explanation, the end face 1 is attached to the female connecting member 20 on the end face 1f.
m male connecting members 10 are fitted and joined.

First, the end face 1m is brought close to the end face 1f. The segment 1 to be joined to the end face 1f of the existing fixed segment 1 is slightly oscillated at the time of approaching movement, and even if there is a manufacturing error, the chamfer 21b and the male rod 1
The joining position is corrected by the tapered portion 17 of the hole 4 and the hole 21
The male rod part 14 is guided to a.

Next, the male rod portion 14 is connected to the hole 2 in FIG.
1a. Further, the male rod portion 14 advances, and the tapered portion 17 comes into contact with the ring 30, and the ring 30 is inserted into the hole 21a.
And move it to the back.

With the movement of the ring 30, the male rod 14 also moves to the back, and the pressing force of the pin 29 inward in the radial direction moves from the ring 30 to the male rod 14. When the annular groove 15 reaches the position of the pin 29 due to the progress of the insertion of the male rod part 14, the pin 29 is pushed out and inserted into the annular groove 15 by the elasticity of the coil spring 27 as shown in FIG. The locking bolt 12 and the rod-shaped member 21 are fixed in the axial front-rear direction by the pin 29. At this time, the gap between the end face 1f and the end face 1m is zero. Once the pins 29 once fitted in the annular groove 15, even if a tensile force is applied to the segments 1 and 1, four pins per one joint device 3 resist,
There is no disconnection.

[0020]

The effects of the present invention are listed below. (1) When the male rod portion of the male connecting member provided on one segment is fitted into the hole of the female connecting member provided on the other segment by the segment coupling device of the present invention, the female The pin of the connecting member is fitted into the annular groove of the male rod, and the joint is fixedly moved in the front-rear direction. The joints do not disengage because the pins resist the pulling force on the segment. (2) Due to the taper provided at the tip of the male rod and the chamfer provided at the entrance of the hole of the female connecting member, the displacement of the joining position and the segment manufacturing error can be absorbed and the fitting and joining can be easily performed. (3) The shape and structure of the joint device are simple and easy to manufacture and install in a segment. (4) Since the bar-shaped member of the male connecting member and the bar-shaped member of the female connecting member are embedded in the segment, they serve as a reinforcing bar for the segment and also serve as a segment strength member. (5) Since the locking bolt can be removed, it can be mounted on site and can be prevented from bending or deforming during transportation.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a state in which adjacent segments are joined by a segment joint device of the present invention.

FIG. 2 is a side sectional view showing the male connecting member of FIG. 1;

FIG. 3 is a side sectional view showing the female connecting member of FIG. 1;

FIG. 4 is a view as viewed in the direction of the arrow X in FIG. 3;

FIG. 5 is a top view of a segment according to the present invention.

FIG. 6 is a side view of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Segment 1m ... End face with a male connection member 1f ... End face with a female connection member 3 ... Coupling device 10 ... Male connection member 11 ... First rod shape Member 11a Internal screw 12 Lock bolt 14 Male rod (outer end) 15 Annular groove 16 Male screw 17 Tapered 20 Female connection Member 21: second rod-shaped member 21a, hole 21b, chamfering 23, pin holder 25, plug 26, pin holding ring 27, elastic material (coil spring) 29, ..Pin 30 ・ ・ ・ Ring

Continued on the front page (72) Inventor Yoshitaka Iwasaki 4-18-17, Yotsugi, Katsushika-ku, Tokyo F-term (reference) 2D055 BA01 GC02

Claims (2)

[Claims] 1. A segment joint device for joining two adjacent segments, wherein a female connecting member provided on one of the segments and an other end of which is joined by fitting an outer end portion into the female connecting member. A male connecting member provided on the segment, the male connecting member comprising a first rod-like member embedded in the segment and a locking bolt projecting from the end face of the segment, and an outer end of the locking bolt. The portion has a tapered tip and an annular groove formed in the middle, and the female connecting member is a second member embedded in the segment.
A ring member slidably disposed in a hole formed in the second rod member at an axial center thereof; and a plurality of pin holding portions provided on an outer periphery of the second rod member. A pin urged by an elastic material so as to be slidable inward in the radial direction in the inner hole of the pin holding portion, and when the outer end is fitted into the hole of the second rod-shaped member, The ring coupling device, wherein the ring, which has closed the annular groove at the tip of the outer end, is pushed into the inside of the hole, and the pin fits into the annular groove. 2. The segment joint device according to claim 1, wherein said locking bolt has a threaded portion screwed into said first rod-shaped member.