JPH06146794A - Joint device of segment - Google Patents

Abstract

PURPOSE:To connect segments easily without turning a coupling device quitely and easily pull out a male type coupling member and an overall female type coupling member. CONSTITUTION:A taper-hole 5 is provided to the circumference of the front end of a cylindrical casing 4 tapered to the peripheral surface, a female screw 7 is provided to a hollow section 6 backward thereof, and hanging recessions 9 are formed in the front end. A group of wedge plates 10 formed along the circumference of the taper hole 5 are so arranged that the circumference is formed in a tapered shape. A male screw 12 of an anchor 11 is screwed into the female screw, and a compression spring 14 is made to lie between the male screw and the last end of a group of wedge plates 10 to form a female type coupling member 2. A male type coupling member 3 is so formed that it has an interlocking section having tapered surface and a male screw 3d on the peripheral surface and that it is fastened and fixed to an anchorage metal fixture 15 with a nut 18.

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, as shown in FIG. 7, a tapered hole 22 is formed inside, and a plurality of sliding guide claws 23 along the axial direction are circumferentially divided and formed on the inner surface of the tapered hole 22. A connector 28 including a casing 24, a wedge nut 26 having an outer surface formed into a tapered surface along the tapered hole 22 and having an internal thread 25 formed on the inner surface, and a compression spring 27 pressing the wedge nut 26 is rotated. Without being inserted into the bolt 29, the female screw 25 of the divided wedge nut 26 engages with the male screw of the bolt 29 to push the wedge nut 26 toward the large diameter side of the tapered hole 22,
The internal diameter of the female screw hole formed by the plurality of wedge nuts 26 becomes large, whereby the connector 28 can be inserted up to the base of the bolt 29, and when the connection is completed up to the base, the compression spring 27
There is known a connecting device in which the female screw 25 of the wedge nut 26 meshes with the male screw of the bolt 29 to lock the bolt 29 so that the bolt 29 cannot be pulled out (Japanese Utility Model Publication No. 55-4817).
No. 1).

However, in the above-described conventional connecting tool, it is convenient that the connecting tool 28 can be inserted into the bolt 29 without rotating, but the connecting tool 28 is manually moved to the final position, for example, the joint surface of the plate 30 in FIG. When the hand is separated from the connector 28 after the insertion to 30a, a slight gap is generated between the joint surface 30a and the tip surface of the connector 28.

This is because the amount of return of the wedge nut 26 at the time of stopping after the connection tool 28 is inserted is smaller than the amount of movement of the wedge nut 26 in the large diameter direction at the time of insertion, so that the compression spring is the difference. This is because the connector 28 is pushed back by 27.

Therefore, after inserting the connecting tool 28, the connecting tool 28 must be manually tightened and rotated by more than one and a half rotations, which is complicated and, for example, this rotating operation is narrow between the inner surface of the tunnel and the erector. There was a problem that it was not easy to do in parts.

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, the male type connecting member and the female type connecting member are fixed to the joining member, and after the male type connecting member is inserted into the female type connecting member and connected, the connection is made. There is a problem that the segment cannot be dismantled when the shield segment cannot be released and a problem occurs after joining the shield segments with each other using this joint device, and when the male connecting member or the female connecting member is damaged, etc. However, there is a problem that these cannot be exchanged and used.

[0011]

SUMMARY OF THE INVENTION The present invention is directed to the problem that a gap is created in the joint surface after the above-mentioned conventional joint device is connected. The male connecting member and the female connecting member are fixed to the connecting member, and the male connecting member is fixed. The problem that these connections cannot be released after the members are inserted into the female connection member and connected,
It is intended to solve the problems such as the difficulty of manual fastening work in segment assembly and the complicated mechanism of the automatic fastening device.

[0012]

In order to solve the above-mentioned conventional problems, the present invention is embedded by exposing only the front end surface inside the segment 1 and gradually increasing the outer diameter from the front end side to the rear end side. A tapered hole 5 whose inner diameter increases from the front end side to the rear is provided on the inner circumference of the front end of a casing 4 formed in a cylindrical shape with a slight taper on the outer circumference so as to be contracted. A female screw 7 is provided on at least the inner circumference of the rear end of the formed cavity 6, a receiving port 8 is provided on the tip side of the tapered hole 5, and a hooking recess 9 of a rotary jig is formed on the tip surface of the casing 4. A wedge plate 10 group formed by circumferentially dividing a conical cylindrical body formed along the inner peripheral surface of the tapered hole 5 into a conical cylindrical shape is formed in the tapered hole 5, and the conical cylindrical shape is formed. The inner peripheral surface of the group of wedge plates 10 is rearward from the front end side. The internal thread 7 of the cavity 6 is screwed with the external thread 12 provided at the end of the anchor 11, and the external thread 12 and the wedge plate 10 are arranged. A female connecting member 2 having a compression spring 14 interposed between a spring seat 13 attached to the rear end of the group,
The conical cylindrical wedge plate 1 is provided behind the sharpened guide portion 3a at the tip.
A locking portion 3b having a tapered surface following the inner peripheral surface of the 0th group is provided, and a positioning close fitting portion 3c that can be tightly fitted in the receptacle 8 is provided behind the locking portion 3b, and further rearward thereof. The male screw portion 3d is provided, and the male screw portion 3d is inserted into the through hole 16 provided in the leading end surface of the box-shaped fixing metal fitting 15 which is embedded by exposing the leading end surface and the opening portion at the end portion of the segment 1 and the nut 18 is inserted. The present invention proposes a segment joint device including the male type connecting member 3 fastened and fixed by the method.

[0013]

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 on the tip side of the inner peripheral surface of No. 3, while pushing 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 14, 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. It is pushed back by the spring 14 and retracts along the tapered hole 5 while contracting to the inner peripheral side, and the inner peripheral surface tightly holds the locking portion 3b of the male connecting member 3 and the male connecting by the wedge action. The member 3 is locked so that it cannot be pulled out.

On the other hand, in this state, 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. It is impossible to position and hold it, so that the front and rear segments 1 and 1 are securely joined and integrated to each other without rattling and displacement, and then the segments 1 and 1 adjacent to each other in the ring direction are brought into relative contact with their joint end faces. By press-fitting the cotter 21 into the cotter joint fittings 20, 20, the fastening is integrated.

Next, when it is necessary to remove the segment 1 after joining the segment 1 as described above, the nut 18 of the male connecting member 3 is removed and the fixing metal fitting 1 is removed.
Remove segment 1 by pulling out from 5.

Further, when the female connecting member 2 needs to be removed, when the casing 4 is rotated by the rotary jig engaged with the engaging recess 9, the outer periphery of the casing is tapered, so that the anchor 11 is formed. The edge is cut off from the concrete while gradually coming out of the male screw portion 12, and can be easily pulled out to the outside.

[0017]

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.

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

As shown in FIGS. 2 and 3, in the tapered hole 5, a group of wedge plates 10 formed by circumferentially dividing a conical cylindrical body formed along the inner peripheral surface thereof into a plurality of parts is provided. Is arranged so as to be movable in the axial direction of the conical cylinder, and the inner peripheral surface of the conical cylinder formed by these wedge plates 10 has an inner diameter from the tip side to the rear side similarly to the tapered hole 5. Are formed on the tapered surface so that

A male screw portion 12 provided at the end portion of the anchor 11 is screwed into the female screw 7 at the rear end of the hollow portion 6, and a spring receiving member abutted on the male screw portion 12 and the rear end of the wedge plate 10 is screwed. A compression spring 14 is interposed between the seat 13 and the seat 13.

As shown in FIG. 4, the male connecting member 3 follows the cylindrical inner peripheral surface formed by the sharpened guide portion 3a at the tip and the plurality of wedge plates 10 located behind the guide portion 3a. A male part having a taper surface, a locking part 3b, a positioning close fitting part 3c located behind the locking part 3c that can be tightly fitted to the receiving port 8, and a gripping step part at the rear end located further behind. A through hole 16 formed in the front end surface of a groove-type fixing bracket 15 having a threaded portion 3d and having a front end surface opening exposed and buried in the rear end portion of the segment 1 The male screw portion 3d is loosely inserted and fastened by a nut 18 via a washer 17, and the close fitting portion 3 for positioning with respect to the tip end surface of the fixing metal fitting 15 is positioned.
It is fixed by projecting a front portion from c, and an anchor 19 is attached to a rear end of the fixing fitting 15.

Further, as shown in FIGS. 5 and 6, a cotter bracket 20 having a C-shaped cross section is embedded and fixed at the side end of the segment 1 in the ring direction, so that the segments 1 and 1 adjacent to each other in the ring direction are opposed to each other. The wedge-shaped cotter 21 having an H-shaped cross section is press-fitted into the cotter brackets 20 and 20 in contact with each other from the ring inner surface side so that the segments 1 and 1 in the ring direction are fastened and integrated with each other.

The connecting operation in the above configuration will be described.

The male connecting member 3 of the segment 1 of the next ring positioned and held by the erector is pressed against the female connecting member 2 at the rear end of each segment 1 of the preceding ring assembled to the ring by the cotter joint.

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 group of wedge plates 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 14, and then the locking portion 3b is released. Since the diameter gradually decreases toward the rear, each wedge plate 10 is compressed by the compression spring 1.
4 and then retracts along the tapered hole 5 while contracting to the inner peripheral side, and the locking portion 3 of the male connecting member 3 is formed on the inner peripheral surface thereof.
By tightly holding b, the male connecting member 3 is locked by the wedge action so that it cannot be pulled out.

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 adjacent to each other in the ring direction are fastened and integrated by press-fitting a cotter 21 having an H-shaped cross section into the cotter joint fittings 20 and 20 which are in contact with each other as shown in FIG.

In this way, the ring-direction segment 1,
By using a cotter joint between 1 and the above-mentioned push-in lock joint as the front and rear ring joints, the segment can be set at a predetermined position by the same operation of the erector as before, and the spaces between the rings can be pushed in simultaneously. It is automatically fastened, and the subsequent work is completed only by press-fitting the cotter 21 between the segments in the ring direction.

Next, after joining the segment 1 as described above, when it is necessary to remove the segment 1 such as when it becomes clear that the joining is defective or the segment 1 is defective. , H-shaped cotter 21
Is pulled out, the nut 18 of the male connecting member 3 is removed, and the male fitting member 3 is pulled out from the fixing member 15 as shown by the chain line in FIG.

Even when the male connecting member 3 is damaged during handling of the segment 1 such as during transportation, the male connecting member 3 can be similarly extracted and replaced with a new one. It is also possible to attach the male type connecting member 3 after carrying in on the spot.

Further, when it is necessary to remove the female type connecting member 2, when the casing 4 is rotated by the rotary jig engaged with the engaging recess 9, the outer periphery of the casing is tapered, so that the anchor 11 is formed. The edge is cut off from the concrete while gradually escaping from the male screw portion 12, and can be easily pulled out to the outside as shown by the chain line in FIG.

[0033]

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.

Since the male connecting member can be removed from the fixing metal fitting by removing the nut, it can be easily removed when it is necessary to remove the segment after joining the segments, and the male connecting member is damaged. In this case, it is possible to replace or attach the male connecting member after bringing the segment into the field.

Since the outer periphery of the casing is tapered, by rotating the casing with the rotating jig engaged with the engaging recess, the casing is gradually pulled out from the male screw portion of the anchor, and the edge of the concrete is cut off to remove the female edge. The entire mold connecting member can be easily pulled out to the outside, and when the female mold connecting member is damaged, it can be replaced.

By using a cotter joint between the segments in the ring direction and using the female and male push-fitting locking joints as the front and rear ring joints, the segment can be moved to a predetermined segment by the same operation as the conventional erector. Set to the position, the rings are automatically fastened at the same time as the segments are pushed in and positioned and held on the preceding ring, and the subsequent work is completed only by press-fitting the cotter between the segments in the ring direction. The work can be easily performed by a small amount of human power, and the mechanism of the automatic fastening device can be simplified.

Since the male connecting member is fastened to the front plate of the deformable fixing bracket with the bolts and nuts, it is possible to ensure the deformation followability during an earthquake or the like as in the conventional bolt type joint. The fastening position can be finely adjusted within the range of the clearance between the fixing bracket and the through hole of the front plate.

By using the cotter type joint between the segments in the ring direction, the bending rigidity of the joint portion can be increased, the ring rigidity is improved, and the roundness thereof can be easily ensured.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view of a female connecting member according to the present invention.

FIG. 3 is a front view of a wedge plate group according to the present invention.

FIG. 4 is a cross-sectional view showing a mounted state of the male connecting member according to the present invention.

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

FIG. 6 is a vertical sectional front view showing a fastening state of the cotter type joint according to the present invention.

FIG. 7 is a cross-sectional view of a conventional joint device.

[Explanation of symbols]

 1 segment 2 female type connecting member 3 male type connecting 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 anchor 12 Male screw part 13 Spring seat 14 Compression spring 15 Fixing metal fitting 16 Through hole 17 Washer 18 Nut 19 Anchor 20 Cotter Joint metal fitting 21 Cotter

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 591108640 Atsushi Koizumi 6-67 Midori-cho, Higashimatsuyama City, Saitama Prefecture (72) Inventor Tokujiro Motegi 3-11-18 Iidabashi, Chiyoda-ku, Tokyo Fujimi Institute of Technology Co., Ltd. ( 72) Inventor Hiroshi Okada 7-5-102, Hagiyamadai, Seto City, Aichi Prefecture (72) Inventor Shigeki Kitagawa 2-1026 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Co., Ltd. (72) Inventor Yoshihiko Matsui Tokyo Maeda Construction Industry Co., Ltd. 2-1026 Fujimi 2-chome, Chiyoda-ku, Tokyo (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 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 so that the inner diameter increases from the front end side to the rear side, and the male screw portion provided at the end portion of the anchor is screwed into the female screw of the hollow portion, Attached to this male screw part and the rear end of the wedge plate A female coupling member having a compression spring interposed between it and a spring seat, and a tapered surface that follows the inner peripheral surface of the conical cylindrical wedge plate group behind the sharpened guide portion at the tip. A locking portion is provided, a positioning dense 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 locking portion, and a tip surface is provided at the other end of the segment. A male connecting member that is inserted and inserted into the through hole provided in the front end surface of the fixing bracket having the box removal part inside and is fastened and fixed by a nut. Device of the segment to be used. 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 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 so that the inner diameter increases from the front end side to the rear side, and the male screw portion provided at the end portion of the anchor is screwed into the female screw of the hollow portion, Attached to this male screw part and the rear end of the wedge plate A female coupling member having a compression spring interposed between it and a spring seat, and a tapered surface that follows the inner peripheral surface of the conical cylindrical wedge plate group behind the sharpened guide portion at the tip. A locking portion is provided, a positioning dense 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 locking portion, and a tip surface is provided at the other end of the segment. In the through hole provided in the front end surface of the fixing metal fitting having the box removal part inside which is exposed and embedded, the male connecting member fixed by fastening the nut by inserting the male screw portion and the ring direction of the segment A segment joint device comprising a cotter bracket having a C-shaped cross section buried in an end portion. 3. The casing according to claim 1 or 2, wherein the casing has a slight taper on its outer circumference so that the outer diameter is gradually reduced from the front end side to the rear end side. ] The joint device of the segment described.