JPH08296396A - Segment joint device - Google Patents

Abstract

PURPOSE: To enhance workability by inserting a male type connecting member having a tapered face into an inner peripheral part of a wedge board installed in a tapered hole of a female type connecting member and locking automatically the male type connecting member by a wedge action so that it may not be pulled out. CONSTITUTION: A guide 3a of a male type connecting member 3 is inserted into a wedge board group 10 of a female type connecting member 2 while a wedge 10 is pushed out against a compression spring 15 while the wedge 10 is being pushed open to the outer peripheral side. Then, when the maximum size area of the guide 3a is inserted into the inner peripheral par of the wedge 10, the wedge 10 is pushed back with the spring 15 since the size of a locking part 3b is reduced backward. Then, the wedge 10 is moved backward along an elastic sleeve 11 while it is being shrunken and clamps the locking part 3b tightly at its inner peripheral face. Furthermore, in the case when an axial displacement is produced by an earthquake or the like after a segment 1 is assembled, the connecting member 3 will move in the longitudinal direction by the elastic deformation of the elastic sleeve 11. This construction makes it possible to connect only with a push-in action of the segment without turning a connector and follow with the axial displacement as well.

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 a concrete segment used for the primary lining of a shield tunnel.

[0002]

2. Description of the Related Art As a conventional joint for a concrete segment, a bolt-type joint in which box-extracting fittings embedded in the end of the segment are fastened with bolts and nuts, or a C-shaped cross-section receiver embedded in the end of the segment. A cotter-type joint in which a wedge-shaped cotter having an H-shaped cross section is press-fitted between the metal fittings to be fastened is known.

However, in any of the above-mentioned joints, after the segment is set at a predetermined position by the erector, the fastening work is manually performed in a narrow place at a high place, so that the work is extremely difficult and the work safety is improved. Also had a problem.

On the other hand, an automatic fastening device for automating the fastening of the above-mentioned joint is also known, but since the fastening direction is different between the end portion of the segment in the ring direction and the end portion between the rings, a bolt / nut or cotter supply mechanism. However, the fastening mechanism must be turned each time, and there is a problem that the device is mechanically complicated and takes a long working time.

Further, conventionally, a casing having a tapered hole formed therein and a plurality of sliding guide claws along the axial direction formed on the inner surface of the tapered hole by circumferentially dividing the casing and an outer surface of the tapered hole are provided along the tapered hole. A wedge nut formed on the tapered surface and having an internal thread formed on the inner surface thereof, and a connecting member consisting of a compression spring for pressing the wedge nut are inserted into the bolt without rotating, whereby the divided internal thread of the wedge nut is The wedge nut is pushed toward the large diameter side of the taper hole by engaging with the male screw of the bolt, and the inner diameter of the female screw hole formed by the plurality of wedge nuts is increased, whereby the connector can be inserted to the base of the bolt, There is known a coupling device in which a female spring of a wedge nut is engaged with a male screw of a bolt by a compression spring when the insertion of the bolt is completed, and the bolt is locked so that the bolt cannot be pulled out. Sho 55-48171 JP).

However, in the above-mentioned conventional connecting tool, it is convenient that the connecting tool can be inserted into the bolt without rotating the connecting tool. However, after inserting the connecting tool by hand to the final position, for example, the joint surface of the plates, the hands are connected. When released from the ingredients,
A slight gap is created between the joint surface and the tip surface of the connector.

This is because the amount of return of the wedge nut at the time of stop after insertion of the connector is smaller than the amount of movement of the wedge nut in the large diameter direction at the time of insertion, so that the difference is caused by the compression spring. Is pushed back.

Therefore, after inserting the connecting tool, the connecting tool must be manually tightened and rotated by more than one and a half rotations, which is complicated, and for example, this rotating work is performed in a narrow portion between the inner surface of the tunnel and the erector. There was a problem that was not easy to do.

Therefore, the applicants previously arranged a plurality of wedge plate groups in a tapered hole provided in the casing of the female connecting member so as to be movable in a conical cylindrical shape, and the inner circumference of the wedge plate group. The surface is made a smooth surface without forming a female screw, and the inner peripheral surface is tapered so that the inner diameter increases from the tip side to the rear side, and is inserted into the inner peripheral part of the conical cylindrical wedge plate group. The male connecting member is provided with a protruding portion having a smooth peripheral surface provided with a locking portion having a tapered surface following the inner peripheral surface of the conical cylindrical wedge plate group behind the sharpened guide portion at the tip. Then, by inserting this male connecting member into the inner peripheral portion of the wedge plate group, the locking portion of the male connecting member is tightly held by the inner peripheral surface of the wedge plate group, and the male connecting member is formed by the wedge action. We are developing a joint device that locks members so that they cannot be pulled out and no gaps are created on the joint surfaces. .

However, in this joint device, since the male connecting member and the female connecting member are fixed to the segments by the anchor muscles, the axial displacement of the segments occurs when the tunnel sinks after the segment is assembled or when an earthquake occurs. However, there is a problem in that this displacement cannot be followed when the occurrence of the above occurs.

Therefore, a joint device is being developed, in which the male connecting member is inserted into a box-shaped joint plate and fastened with a nut so that the displacement of the joint plate can follow the axial displacement. However, it is not easy to form the joint plate without a box on the segment, and there is a problem that the strength of the segment of the joint plate part is slightly reduced.

[0012]

SUMMARY OF THE INVENTION The present invention, in the above-mentioned conventional joint device, does not depend on the joint plate without a box,
An object of the present invention is to solve the problem of allowing the deformation of the joint plate to follow the axial displacement.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a cylindrical casing 4 which is embedded in the segment 1 so that only the front end surface is exposed. A tapered hole 5 whose inner diameter increases from the rear to the rear, and a female screw 7 is provided on at least the inner circumference of the rear end of the cavity 6 formed in series behind the tapered hole 5,
A receiving port 8 is provided at the tip end side of the tapered hole 5, and the casing 4
On the tip end surface of the rotary jig, a hooking recess 9 of a rotary jig is formed, and a wedge plate 10 group formed by circumferentially dividing a conical cylindrical body formed following the inner peripheral surface of the tapered hole 5 into a plurality of tapered holes 5 is formed. The conical tubular wedge plates 10 are arranged in such a manner that the inner peripheral surface thereof has a tapered shape such that the inner diameter thereof increases from the front end side to the rear side. Screw the male screw portion 13 provided at the end of the anchor 12 into the female screw 7,
The female connecting member 2 having the compression spring 14 interposed between the male screw portion 13 and the spring seat 14 abutting on the rear end of the wedge plate 10 and the rear of the pointed guide portion 3a. Is provided with a locking portion 3b having a tapered surface that follows the inner peripheral surface of the group of wedge plates 10 having a conical cylindrical shape, and a positioning close-fitting portion that can be tightly fitted in the receptacle 8 behind the locking portion 3b. 3c is provided, and a male screw portion 3d is further provided at the rear thereof, and a male screw is formed in the through hole 17 provided in the tip face of the box-shaped fixing metal fitting 16 embedded by exposing the tip face and the opening at the end of the segment 1. The present invention proposes a segment joint device including a male connecting member 3 into which a portion 3d is inserted and which is fastened and fixed by a nut 19 via a spring washer 18.

Further, according to the present invention, the male type connecting member 3 is screwed and fixed to the nut member 21 having the front end surface exposed and embedded at the other end of the segment 1, and the nut portion 21 material and the female type connecting member 2 are fixed. The present invention proposes a segment joint device in which an anchor muscle 12 whose outer peripheral portion is covered with a sheath is connected between the male screw member 13 and the male screw member 13.

[0015]

When the guide portion 3a of the male connecting member 3 is inserted into the inner peripheral portion of the wedge plate 10 group from the receiving port 8 of the female connecting member 2, the guide portion 3a has a conical cylindrical wedge plate 10 group. Since it gradually becomes larger than the small diameter portion of the inner peripheral surface on the tip side, while pushing out each wedge plate 10 to the outer peripheral side by the tapered surface of the guide portion 3a, the wedge plate 10 is pushed forward against the elastic force of the compression spring 15, Eventually guidance section 3
When the maximum diameter portion of the base end of a is inserted into the inner peripheral portion of the wedge plate 10 group having a conical cylindrical shape, the diameter of the locking portion 3b gradually decreases toward the rear, so that each wedge plate 10 is compressed. The elastic sleeve 11 is pushed back by the spring 15 and contracts toward the inner peripheral side.
Along with the inner peripheral surface of the male connecting member 3 so as to tightly hold the locking portion 3b of the male connecting member 3 and to lock the male connecting member 3 so that the male connecting member 3 cannot be pulled out by the wedge action.

On the other hand, in this state, the segments 1, 1
The two are closely contacted with each other without forming a gap, and the positioning close fitting portion 3c of the male connecting member 3 is tightly fitted into the receiving port 8 of the casing 4, so that the male connecting member 3 is easily swung in the casing 4. Positioning and holding are impossible, so that the front and rear segments 1 and 1 are securely joined and integrated in the front and back without backlash and displacement.

After the segments 1 and 1 are assembled in this way, when axial displacement occurs due to an earthquake or the like, the male connecting member 3 locked to the wedge plate 10 group of the female connecting member 2 is locked. Can move in the axial direction by the elastic deformation of the elastic sleeve 11 and can follow the axial displacement.

Therefore, if the female connecting member 2 fitted with such an elastic sleeve 11 is used, the male connecting member 3 is used.
Does not need to be fixed to the box-shaped grooved metal fittings 16,
As shown in FIG. 3, the nut member 21 can be screwed and fixed.

On the other hand, the male type connecting member 3 is a spring washer 1.
Since it is fastened to the nut 19 via 8, the spring washer 18 elastically deforms in the axial direction with respect to the axial displacement, and the axial displacement can be followed.

Further, in the embodiment shown in FIG. 3, since the anchor bar 12 is covered with the sheath 22 and cut off from the concrete of the segment 1, the anchor bar 12 is stretched in the axial direction by the extension of the anchor bar 12 against the axial displacement. Move
Axial displacement can be followed.

[0021]

EXAMPLE As shown in FIG. 1, a female connecting member 2 is provided at the front end of a concrete segment 1 and a male connecting member 3 is provided at the rear end thereof at positions corresponding to each other in the front-rear direction.

The casing 4 constituting the outer shell of the female connecting member 2 is embedded inside the segment 1 so that only the front end surface is exposed and the outer diameter is gradually reduced from the front end side to the rear end side. The outer periphery is formed into a cylindrical shape with a slight taper, the inner periphery of the tip portion thereof is formed with a tapered hole 5 whose inner diameter gradually increases from the tip end side to the rear side, and at least the cavity portion 6 formed in series behind the taper hole 5 is formed. A female screw 7 is formed on the inner circumference of the rear end portion, and a receiving port 8 is formed on the tip end side of the tapered hole 5.

Further, on the tip end surface of the casing 4, there is formed an engaging recess 9 of a rotary jig for pulling the casing 4 out of the segment 1 while rotating the casing 4.

In the tapered hole 5, a wedge plate 10 group formed by circumferentially dividing a conical cylinder body formed along the inner peripheral surface thereof into a plurality of conical cylinders is movably in the axial direction of the casing 4. The conical cylindrical inner peripheral surface formed by these wedge plates 10 is formed into a tapered surface so that the inner diameter increases from the front end side to the rear side like the tapered hole 5. Has been done.

Between the tapered hole 5 and the wedge plate group 10, a corrugated steel plate having a continuous corrugation in the circumferential direction is formed into a truncated cone shape following the tapered surface of the tapered hole 5, as shown in FIG. An elastic sleeve 11 is interposed.

The female screw 7 at the rear end of the hollow portion 6 has a male screw member 1 provided at the end of the anchor bar 12.

3, the compression spring 15 is interposed between the male screw member 13 and the spring seat 14 abutting on the rear end of the wedge plate 10.

The male connecting member 3 has a guide portion 3a having a sharp tip and a tapered surface which follows the cylindrical inner peripheral surface formed by the plurality of wedge plates 10 located behind the guide portion 3a. It comprises a portion 3b, a positioning close fitting portion 3c located behind it, which can be tightly fitted in the receptacle 8, and a male screw portion 3d located further behind, which has a gripping step portion at its rear end. The male screw portion 3d is inserted into the through hole 17 provided in the tip end surface of the groove-type fixing metal fitting 16 in which the tip end surface opening is exposed and buried in the rear end portion of the segment 1 and the box is removed inside. It is inserted and fastened by a nut 19 via a spring washer 18 having rigidity, and is fixed by protruding a front portion from the positioning close fitting portion 3c with respect to the front end surface of the fixing metal fitting 16, and the rear end of the fixing metal fitting 16. An anchor 20 is attached to the.

As the spring washer 18, a spring washer in which a cut is provided in a part of a ring-shaped steel plate and the left and right ends thereof are opposed to each other with a step, or a ring-shaped steel plate is a corrugated plate continuous in the ring direction. Use a spring washer or the like.

Next, in the embodiment shown in FIG. 3, the female type connecting member 2
A nut member 21 is connected to the other end of the anchor muscle 12 connected to the male screw member 13, and the nut member 21 is embedded so that its tip end surface is exposed at the tip end of the segment 1.
The male threaded portion 3d of the male connecting member 3 is screwed into and fixed to this, and the outer peripheral portion of the anchor muscle 12 is covered with a sheath 22 and cut off from the concrete of the segment.

The operation of assembling the segment 1 and the connecting operation of the joint members in the above structure will be described.

The male connecting member of the segment 1 of the next ring, which is positioned and held by the erector, is attached to the female connecting member 2 at the rear end of each segment 1 of the preceding ring which is joined in the ring direction by the cotter joint and assembled into a ring shape. Push 3 facing each other.

When the guide portion 3a of the male connecting member 3 is inserted from the receptacle 8 of the female connecting member 2 into the inner peripheral portion of the wedge plate group 10,
Since the diameter of the guide portion 3a gradually becomes larger than the small diameter portion on the tip side of the inner peripheral surface of the wedge plate 10 group having the conical cylindrical shape, the tapered surface of the guide portion 3a spreads each wedge plate 10 toward the outer peripheral side. When the maximum diameter portion of the base end of the guide portion 3a is inserted into the inner peripheral portion of the conical-cylindrical wedge plate 10 group, it is pushed forward against the elastic force of the compression spring 15, and the locking portion 3b becomes Since the diameter gradually decreases toward the rear, each wedge plate 10 is compressed by the compression spring 1.
The elastic sleeve 1 is pushed back to 5 and contracts toward the inner peripheral side.
1, the inner peripheral surface of the male connecting member 3 holds the locking portion 3b of the male connecting member 3 tightly to prevent the male connecting member 3 from slipping out by a wedge action, and the diameter of the male connecting member 3 via the elastic sleeve 11. Locks elastically in the direction.

On the other hand, in this state, segments 1, 1
They closely contact each other without forming a gap, and the positioning close fitting portion 3c of the male connecting member 3 tightly fits into the receiving port 8 of the casing 4 to prevent the male connecting member 3 from swinging inside the casing 4. Positioning and holding are performed, whereby the front and rear segments 1 and 1 are securely joined and integrated in the front and rear without backlash and displacement.

Next, the segments 1 and 1 which are adjacent to each other in the ring direction are fastened and integrated by press-fitting a cotter having an H-shaped cross section into a cotter joint fitting having a C-shaped cross section, which is installed on the surfaces which are in contact with each other.

[0036]

As described above, the present invention has the following effects.

By inserting the male connecting member into the inner peripheral portion of the wedge plate group of the female connecting member, the wedge portion is tightly held by the inner peripheral surface of the wedge plate group. The male connecting member cannot be pulled out by the action, and it can be automatically locked without creating a gap between the joint surfaces, and the connecting member can be easily pushed between the rings without rotating the connecting member at all. The segments can be joined together.

When an axial displacement occurs due to an earthquake or the like after assembling the segments, the male connecting member locked to the wedge plate group of the female connecting member moves in the axial direction by elastic deformation of the elastic sleeve. It is possible to follow the axial displacement.

Since the male coupling member is fastened to the nut via the spring washer, the male coupling member moves in the axial direction by the elastic deformation of the spring washer with respect to the axial displacement,
It is possible to follow the axial displacement.

Since the anchor muscle connecting the female connecting member to the male connecting member is covered with the sheath and cut off from the concrete of the segment, the anchor muscle is stretched in the axial direction by the elongation of the anchor muscle against axial displacement. It is possible to follow the axial displacement.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a joint device of the present invention.

FIG. 2 is a perspective view of an elastic sleeve according to the present invention.

FIG. 3 is a sectional view showing an embodiment of the joint device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 segment 2 female connection member 3 male connection member 3a guide part 3b locking part 3c tight fitting part 3d male screw part 4 casing 5 taper hole 6 cavity part 7 female screw 8 socket 9 engaging recess 10 wedge plate 11 elastic sleeve 12 anchor 13 male screw part 14 spring seat 15 compression spring 16 fixing metal fitting 17 through hole 18 spring washer 19 nut 20 anchor 21 nut member 22 sheath

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tokujiro Motegi 3-11-18 Iidabashi, Chiyoda-ku, Tokyo Fujimi Institute of Technology Co., Ltd. (72) Inventor Shigeki Kitagawa 2-1026 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Yoshihiko Matsui 2-1026 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Jun Koizumi 6-67 Midori-cho, Higashimatsuyama City, Saitama Prefecture

Claims (3)

[Claims] 1. A taper hole, the inner diameter of which is enlarged from the front end side to the rear side, is provided on the inner circumference of the front end portion of a cylindrical casing that is embedded by exposing the front end surface on one of the front and rear end portions of the segment. A female screw is provided at least on the inner periphery of the rear end of the cavity formed in a series at the rear, a receiving port is provided on the tip end side of the tapered hole, and a conical cylindrical body formed following the inner peripheral surface of the tapered hole is formed. A wedge plate group formed by dividing the wedge plate group into a plurality of pieces in the circumferential direction is formed into a conical tubular shape in the tapered hole, and the inner peripheral surface of the conical tubular wedge plate group has an inner diameter from the front end side to the rear side. Arranged in a tapered shape so as to expand, an elastic sleeve formed in a frustoconical shape by corrugated steel plates having a continuous corrugation in the circumferential direction is interposed between the tapered hole and the wedge plate group, A male screw provided on the end of the anchor to the female screw of the cavity. A female connecting member having a compression spring interposed between the male screw portion and a spring seat abutting on the rear end of the wedge plate, and a rear end of a sharp guide portion at the tip. A locking portion having a tapered surface that follows the inner peripheral surface of the conical-cylindrical wedge plate group is provided, and a positioning tight fitting portion that can be tightly fitted into the receiving port is provided behind the locking portion, Further, a male screw portion is provided on the rear side of the segment, and the male screw portion is provided in the through hole provided on the leading end surface of the fixing metal fitting having the box removal portion inside by exposing the leading end surface at the other end portion of the segment. A segment joint device comprising a male connecting member inserted and fastened and fixed by a nut. 2. A taper hole whose inner diameter increases from the front end side to the rear side is provided on the inner circumference of the front end portion of a cylindrical casing having a front end surface exposed and embedded in one of the front and rear end portions of the segment. A female screw is provided at least on the inner periphery of the rear end of the cavity formed in a series at the rear, a receiving port is provided on the tip end side of the tapered hole, and a conical cylindrical body formed following the inner peripheral surface of the tapered hole is formed. A wedge plate group formed by dividing the wedge plate group into a plurality of pieces in the circumferential direction is formed into a conical tubular shape in the tapered hole, and the inner peripheral surface of the conical tubular wedge plate group has an inner diameter from the front end side to the rear side. A spring arranged in a taper shape so that it expands, a male screw portion provided at the end of the anchor is screwed into the female screw of the hollow portion, and the male screw portion and the rear end of the wedge plate are attached. A female connecting member having a compression spring interposed between the seat and the seat; Behind the pointed guide part,
An engaging portion having a tapered surface that follows the inner peripheral surface of the conical tubular wedge plate group is provided, and a positioning tight fitting portion that can be tightly fitted into the receiving port is provided behind the engaging portion, and Insert the male screw part into the through hole provided in the end face of the fixing bracket that has the male screw part behind it and exposes the tip face at the other end of the segment and has the box removal part inside that is embedded. And a male connecting member fastened and fixed by a nut through a spring washer having rigidity, and a segment joint device. 3. A taper hole whose inner diameter increases from the front end side to the rear side is provided on the inner circumference of the front end portion of a cylindrical casing that is embedded by exposing the front end surface at one of the front and rear end portions of the segment. A female screw is provided on at least the inner periphery of the rear end of the cavity formed in a series at the rear, a receiving port is provided on the tip side of the tapered hole, and a hooking recess of a rotary jig is formed on the tip surface of the casing. A wedge plate group formed by circumferentially dividing a conical cylinder body formed following the inner peripheral surface of the tapered hole into a conical cylinder shape in the tapered hole, and The inner peripheral surface of the wedge plate group is arranged so as to form a taper shape such that the inner diameter increases from the tip side to the rear side, and a male screw member is screwed into the female screw of the cavity portion. A pressure is applied to the spring seat attached to the rear end of the plate. A female connecting member with a compression spring interposed and a locking portion having a tapered surface following the inner peripheral surface of the conical cylindrical wedge plate group are provided behind the sharpened guide portion at the tip. A positioning tight fitting portion that can be tightly fitted in the receiving port is provided behind the locking portion, and a male screw portion is further provided behind the positioning dense fitting portion.
A male type connecting member in which the male screw portion is screwed into and fastened to a nut member having a front end surface exposed at the other end of the segment and embedded, and a male screw member of the female type connecting member and the male type connecting member. A joint device for a segment, wherein the joint device is connected to a nut of a member, and comprises an anchor streak whose outer peripheral portion is covered with a sheath.