JPH0672519B2 - Joining mechanism of supporting segment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a connecting mechanism for supporting segments in a shield tunnel.

[0002]

2. Description of the Related Art In a shield tunnel, segments of a slightly smaller diameter than the shield cylinder are sequentially assembled at the rear part of the shield cylinder as the shield machine is dug, and these are fastened together with bolts and nuts to assemble a tubular support body. .
Then, a reaction force is applied to the tubular support body, and the shield machine is advanced together with the thrust of the shield jack provided in the shield machine to successively construct the shield tunnel.

In order to fasten the segments, bolts are inserted into fastening portions provided at the ends of the segments to be joined together, and nuts are fastened to join them.

Further, as a technique for fastening the segments to each other, there has recently been a coupling mechanism shown in FIGS. In the coupling mechanism shown in FIGS. 19 to 21, the C-shaped bracket 41 and the H
The metal mold 44 is used. The C-shaped metal fitting 41 is fixed near the mating surfaces of the segments A and B to be coupled to each other. A protrusion 42 is provided on the mating surface side of each C-shaped bracket 41.
Is provided. C-shaped metal fitting 4 at each protrusion 42
A taper 43 that gradually increases the dimension c in the XX 'direction is formed on the outer end surface of the 1, 41 in the arrangement direction (the XX' direction). The H-shaped metal fitting 44 is formed by providing collars 46, 46 at both ends of the connecting portion 45 in the XX 'direction. When the H-shaped metal fitting 44 is pushed over the C-shaped metal fittings 41, 41, the protruding portion 4 of the C-shaped metal fittings 41, 41 is attached to the inner end surface of each collar 46 in the XX ′ direction.
Tapers 47 and 4 joined to tapers 43 and 43 of 2,42
7 are formed.

In the prior art shown in FIGS. 19 to 21, as shown in FIG. 19, a segment A and a segment B to be joined to each other are brought into contact with each other at their mating surfaces and fixed to the segment A. The metal fitting 41 and the C metal fitting 41 fixed to the segment B extend over the segment A,
Insert the H-shaped metal fitting 44 from the inside of B. This H-shaped bracket 4
4 is inserted using, for example, a hydraulic jack. As described above, with the insertion of the H-shaped metal fitting 44, the taper 43, 47 of the protrusions 42, 42 of the C-shaped metal fitting 41, 41,
By the wedge action by the engagement of the flanges 46, 46 of the H-shaped metal fitting 44 with the tapers 47, 47, the fixed segments A, B of the C-shaped metal fittings 41, 41 are attracted in a direction in which they approach each other, and FIG. As shown in FIG. 21, the segment A and the segment B are combined.

[0006]

Among the above-mentioned conventional techniques, the conventional technique of inserting a bolt into a fastening portion provided at an end of a segment to be coupled to each other and tightening with a nut is a work of coupling. There is a problem with poor sex.

On the other hand, in the prior art shown in FIGS. 19 to 21, although the workability of the connection is improved, a shearing force acts on the protrusion 42 of the C-shaped metal fitting 41 and the collar 46 of the H-shaped metal fitting 44. , The protrusion 42 of the C-shaped bracket 41 and the H-shaped bracket 4
As shown in FIG. 22, a bending moment acts on the collar 46 of the H-shaped metal fitting 44 depending on the contact with the collar 46 of No. 4. As described above, since the shearing force and the bending moment act on the protruding portion 42 of the C-shaped metal fitting 41 and the flange 46 of the H-shaped metal fitting 44, in order to counter this, a strengthening measure such as widening the cross-sectional area of these portions is taken. Therefore, there is a problem that the coupling mechanism portion is increased in size and weight is increased.

The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a connecting mechanism for a supporting segment that is small in size, lightweight, and easy to handle.

Another object of the present invention is to provide a support segment connecting mechanism capable of safely performing a connecting operation between segments.

Still another object of the present invention is to provide a support segment connecting mechanism capable of preventing intrusion of earth and sand or water from a connecting portion between the segments.

[0011]

In order to achieve the main object, according to the present invention, female metal fittings are fixed near the mating surfaces of the segments to be connected to each other, and the male metal fittings are pushed over both female metal fittings. In the joining mechanism of the supporting segment of the type in which the mating surfaces are pressed together to join the two segments, the arrangement direction of the both segments to be joined is X.
-X 'direction, and the direction orthogonal to this in the same plane as YY'
Direction, the thickness direction of the segment, and the pushing direction of the male fitting with respect to the female fitting is the ZZ 'direction, inside each female fitting, as seen from the ZZ' direction, the mating surface side A wedge-shaped female portion is formed so as to gradually decrease the distance in the YY 'direction toward both sides, and both side surfaces of the wedge-shaped female portion in the YY' direction are moved toward the ZZ 'direction along the XX' direction. The wedge-shaped female portion and the wedge surface of both female metal fittings when the outer shape of the male metal fitting is pushed over the insides of both female metal fittings of the segments to be joined. It has a shape that fits in.

Further, in order to achieve the above-mentioned other object, the present invention provides between the female metal fitting and the male metal fitting a drop-out preventing means for preventing the male metal fitting from falling off when the male metal fitting is attached.

Further, in order to achieve the above-mentioned other object, according to the present invention, a male metal fitting is pushed into both of the female metal fittings, and after connecting both segments, the connecting portion can be fitted and fixed from the inside of the segment. It has a cover attached.

[0014]

In the present invention, the female metal fittings fixed to the mating surfaces of the segments to be connected to each other and the male metal fittings pushed over both female metal fittings are used. In addition, a wedge-shaped female portion is formed inside each of the female metal fittings so as to gradually reduce the distance in the YY 'direction toward the mating surface side of the female metal fittings when viewed in a plan view. Further, both side surfaces in the YY 'direction of the wedge-shaped female portion are formed as wedge surfaces that gradually reduce the dimension in the XX' direction toward the ZZ 'direction.

Therefore, when connecting both segments, the mating surfaces of both segments are placed in contact with each other. Then, on the wedge surface formed on both female metal fittings fixed to the mating surface side of both segments, from the inside of the segment,
Align the wedge surfaces formed on the male fitting and push the male fitting across both female fittings. A hydraulic jack, for example, is used to push in the male fitting.

When the male metal fittings are pushed into both female metal fittings, the wedge surfaces of the male metal fittings are inserted while pressing the wedge surfaces of the female metal fittings, so that the two segments to which the female metal fittings are fixed deviate from each other. It is attracted and joined in the direction that fits. This attracting force is generated by the shear resistance of the portion of the male fitting having the wedge surface, and no bending moment is generated with respect to the end portion of the female fitting on the mating surface side. When the attracting force is increased, both sides in the Y-Y 'direction of the female metal fitting are slightly displaced in the opening direction, but the deformation is blocked by the reinforced concrete of the segment having a high compression resistance. Therefore, after increasing the pushing force of the male mold and giving a great pulling force to both segments,
It is possible to prevent the deformation of the female mold. As a result, the thickness and cross-sectional area of both female metal fittings can be reduced, so that the overall size and weight of the coupling mechanism can be reduced, and the handleability can be improved.

Since the outer shape of the male metal fitting is formed so as to fit the wedge-shaped female portion and the wedge surface when the male metal fitting is pushed over both female metal fittings of the segments to be joined, both female metal fittings are formed. The position of both segments in the XX 'direction and the YY' direction is determined simultaneously by the action of the wedge surface of the female fitting and the wedge surface of the male fitting by pushing the male fitting into the wedge shaped female part of You can

Further, according to the present invention, a drop-prevention means is provided between the female metal fitting and the male metal fitting so as to prevent the male metal fitting from coming off when the male metal fitting is mounted. You can

Further, according to the present invention, the male fitting is pushed into the female fitting to join the two segments together, and then the cover is fitted to the joining portion from the inside of the segment to fix the segments together. It is possible to prevent the infiltration of dirt, water, etc. from the joint part of.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of the present invention,
FIG. 1 is a cross-sectional front view of the shield tunnel to which the coupling mechanism according to the present invention is applied, taken in a direction orthogonal to the axial direction, FIG. 2 is a vertical sectional side view taken along the line KK of FIG. 1, and FIG. FIG. 4 is a vertical sectional side view showing the same coupling process, FIG. 5 is a vertical sectional side view showing the same coupling process, and FIG. FIG. 6 is an enlarged view of an L portion and is a plan view of FIG. 5.

In the embodiments shown in these figures, as shown in FIGS. 1 and 2, the shield tunnel 1 has a corner segment 2 for supporting and supporting, a flat plate segment 4, and another corner segment 3 in front. Arranged in a rectangular link shape,
They are joined by a piece-to-piece joint 5 and a ring-to-ring joint 6 which are coupling mechanisms, and are assembled into a tubular support body which is a shield tunnel.

In FIG. 4 and subsequent figures, the corner segments 2 and 3 and the flat plate segment 4 are shown as segments A and B to be connected to each other.

Further, both the segments A and B to be combined are
The direction of arrangement is defined as XX 'direction, the direction orthogonal to the same is defined as YY' direction, and the thickness direction of the segments A and B is defined as ZZ 'direction.

The connecting mechanism of the segments is shown in FIGS.
As shown in FIG. 2, it is configured by including a set of two female metal fittings 7 and one male metal fitting 18.

As shown in FIGS. 3 to 6, the female metal fitting 7 has an end surface 8 whose outer shape is a mating surface of the female metal fittings, and an end surface 9 opposite to the outer surface in the XX 'direction. YY '
It is surrounded by the side faces 10 and 11 on both sides in the direction, and is formed in a substantially quadrangular shape when seen from a plane. Also, the female metal fitting 7
As shown in FIGS. 3 and 6, the wedge-shaped female portion 12 is
And a bag portion 16 are formed, and a slit 15 is formed at the end of the female fitting 7 on the mating surface side so as to penetrate in the ZZ ′ direction. The wedge-shaped female portion 12 is shown in FIG.
As can be seen from the above, it is formed in a wedge shape in which the interval (dimension) a in the Y-Y 'direction is gradually reduced toward the mating surface side when seen in a plan view. As shown in FIGS. 3 and 4, the side surfaces 13 and 14 on both sides of the wedge-shaped female portion 12 in the Y-Y 'direction are Z-shaped.
It is formed in a wedge surface that gradually reduces the dimension b in the XX 'direction toward the -Z' direction. The slit 15 is ZZ ′.
It is formed straight in the direction and communicates with the wedge-shaped female portion 12. The bag portion 16 is continuously formed on the opposite side of the wedge-shaped female portion 12 from the mating surface. A plurality of fixing rebars 17 with nodes are attached to the end surface 9 of the female metal fitting 7. As shown in FIGS. 4 to 6, the female metal fitting 7 is arranged near the mating surfaces of the segments A and B, and the slit 15 is directed toward the mating surfaces of the segments A and B, and Through reinforced anchoring bar 17 with a segment of reinforced concrete,
It is fixed to B.

As shown in FIGS. 3 to 6, the male fitting 18 has a central constricted portion 19 and wedge portions 20 and 20 integrally provided on both sides of the constricted portion 19 in the XX 'direction. However, it is formed to be almost repellent when viewed from above. The constricted portion 19
Are formed so that they can be inserted into the slits 15, 15 of the female metal fittings 7, 7 arranged to face each other. Each wedge portion 20 has a shape of Y-
It is formed in a wedge shape in which the dimension a in the Y ′ direction is gradually reduced so that it can be inserted into the wedge-shaped female portion 12 of the female metal fitting 7. Side surfaces 2 on both sides of the wedge portion 20 in the YY 'direction.
As shown in FIG. 3 and FIG. 4, the reference numerals 1 and 22 are formed in wedge surfaces that gradually reduce the dimension b in the XX ′ direction toward the ZZ ′ direction. It can come into close contact with the side faces 13 and 14 of the female portion 12 in the YY 'direction. That is, when the outer shape of the male metal fitting 18 is pushed over the female metal fittings 7, 7 arranged facing each other in the XX ′ direction, the slits 15 of both female metal fittings 7, 7 and the wedge-shaped female part 12 are formed. , And the side surfaces 13 and 14 which are wedge surfaces thereof.

The segment connecting mechanism in the first embodiment is assembled and used as follows.

That is, as shown in FIG. 4, in this embodiment, the female metal fitting 7 is preliminarily fixed near the mating surfaces of the segments A and B to be joined to each other, through the fixing rebar 17 having a joint.

Therefore, a seal 23 is provided outside the segments A and B between the mating surfaces of the segments A and B, and the segments A and B are brought into contact with each other to form the female metal fittings 7, 7.
Are arranged so as to face each other in the XX ′ direction.

Next, inside the segments A and B, the side surfaces 13 and 1 which are the wedge surfaces of the wedge-shaped female portions 12 of the female metal fittings 7 and 7, respectively.
The side surfaces 21 and 22 which are the wedge surfaces of the wedge portion 20 of the male metal fitting 18 and the constricted portion 19 are aligned with the slit 4 and the slit 15, and the male metal fitting 18 from the inside of the segments A and B to both female metal fittings 7 and 7. Push in using a hydraulic jack.

When the male fitting 18 is pushed into the female fittings 7, 7, the side surfaces 21, 22 which are the wedge surfaces of the male fitting 18 are the side surfaces 13, 14 which are the wedge surfaces of the female fittings 7, 7. Since it is inserted while pressing, both the segments A and B to which the female mold 7 is fixed are attracted in a direction in which they approach each other, and are joined as shown in FIGS. 5 and 6.

The attraction force of the segments A and B is generated by the shearing resistance force of the wedge portions 20 and 20 of the male mold member 18, and a bending moment is generated with respect to the ends of the female mold members 7 and 7 on the mating surface side. do not do.

When the attraction force to the segments A and B becomes large, both the female metal fittings 7 and 7 try to be slightly displaced in the opening direction in the YY 'direction, but the side portions in the YY' direction are resistant to each other. It is guarded by the reinforced concrete of segments A and B, which have high compressive force. Therefore, the female metal fitting 7,
Deformation of both sides of YY in the YY 'direction is blocked. Therefore, it is possible to prevent the deformation of the female metal fittings 7 and 7 while increasing the pushing force of the male metal fitting 18 to give a great pulling force to both the segments A and B. As a result, the thickness and cross-sectional area of both female metal fittings 7, 7 can be reduced, so that the overall size and weight of the coupling mechanism can be reduced, and the handleability can be improved.

When the outer shape of the male metal fitting 18 is pushed over the female metal fittings 7, 7 fixed to both segments A, B, the slits 15 of both female metal fittings 7, 7 and the wedge-shaped female part 12 are pushed. And the side surfaces 13 and 14 which are wedge surfaces thereof, are formed in a shape that fits into the slits 15 and wedge-shaped female portion 12 of both female metal fittings 7 and 7, and the constricted portion 19 of the male metal fitting 18. And the wedge portions 20 are pushed in, the side surfaces 13 and 14 which are the wedge surfaces of the female metal fittings 7 and 7 and the side surfaces 21 and 22 which are the wedge surfaces of the male metal fitting 18 are acted on by X of both segments A and B.
The positions in the -X 'direction and the YY' direction can be determined at the same time.

In the state where the male metal fitting 18 is pushed into both female metal fittings 7, 7, the bag portion 16 formed inside each female metal fitting 7 serves as a gap for absorbing a dimensional error or the like of each portion. To work.

Next, FIGS. 7 to 9 show a second embodiment of the present invention. FIG. 7 is a plan view of a disassembled state of the fall-out preventing means when the male fitting is attached, and FIG. 9 and 9 are enlarged views of the M portion of FIG. In the second embodiment shown in FIGS. 7 to 9, the drop-out preventing means 2 is provided between the female metal fitting 7 and the male metal fitting 18.
4 are provided.

The falling-off preventing means 24 is composed of a tooth row 25 formed inside the female metal fitting 7 and a projection 26 provided on the end surface of the male metal fitting 18. The dentition 2
5 is on the end surface of the female metal fitting 7 on the side of the bag portion 16,
It is formed in a sawtooth shape inclined in the ZZ 'direction. The protrusion 26 has a fingertip-shaped cross section. Further, the protrusion 26 is attached so as to be able to move in and out via a compression spring 27 provided in a groove 28 formed at an end of the male fitting 18 in the XX ′ direction.

Then, when the male metal fitting 18 is pushed into the female metal fitting 7 to join the segments to each other, the projection 26 meshes with the tooth row 25 at the position where the male metal fitting 18 is pushed into the female metal fitting 7 and the male mold Since the metal fitting 18 is fixed, the male metal fitting 18
It is possible to prevent the falling of this when mounting and safely connect the segments to each other.

The other structure and operation of the second embodiment are the same as those of the first embodiment.

FIG. 10 shows a third embodiment of the present invention and is an enlarged side view of the main part. In the third embodiment shown in FIG. 10, the drop-out preventing means 24 when the male fitting is attached
Has a tooth row 25 and a snap plate 29. The snap plate 29 is made of an elastic material such as an iron plate, and the other end in the ZZ 'direction is attached to the end face of the male fitting 18 in the XX' direction by a pin 30. , ZZ ′ direction one end is provided so as to be able to engage with the tooth row 25.

In the third embodiment, when the male fitting 18 is pushed into the female fitting 7, one end portion of the snap plate 29 engages with the tooth row 25 at the pushed position, and the male fitting 18 is pushed.
To prevent the falling off.

The other structure and operation of the third embodiment are the same as those of the second embodiment.

Next, FIGS. 11 and 12 show a fourth embodiment of the present invention. FIG. 11 is a plan view of an essential part, and FIG.
Is a vertical sectional side view. In the fourth embodiment shown in FIGS. 11 and 12, the male fitting is pushed over both female fittings to join both segments, and then the cover 31 is attached to this joining portion.

The cover 31 is formed of a synthetic resin plate, a metal plate or the like. Further, claws 32 are provided at both ends of the cover 31 in the XX 'direction. On the other hand, a concave portion 33 is formed on the end surface of each female fitting 7 on the side of the bag portion 16 toward the inner side in the ZZ ′ direction. The claw 32 and the recess 3
3 and 3 form a fastening means for the cover 31, and the claw 32 can be snap-fitted to the recess 33.

Although the cover 31 is not shown in FIG. 11 in cross section, it is hatched for clarity.

In this fourth embodiment, as described above, both female metal fittings 7, 7 (only one female metal fitting is shown in FIGS. 11 and 12 and the other female metal fitting is omitted). After pushing in the male metal fitting 18 to connect the segments to each other, a cover 31 is put between the female metal fittings 7 and 7 and the male metal fitting 18 from the inside of the segment, and both ends of the cover 31 in the XX 'direction are attached. The provided claw 32 is pushed into a recess 33 formed in the end surface of the female metal fitting 7 on the side of the bag portion 16 and snap-fitted to be attached.

As a result, it is possible to prevent the infiltration of earth and sand, water or the like from the joint between the segments.

The other structure and operation of the fourth embodiment are the same as those of the first embodiment. Further, the fourth embodiment can be applied to the second and third embodiments.

13 to 16 show a fifth embodiment of the present invention. FIG. 13 is a plan view of a main portion, FIG. 14 is a vertical side view of the same, and FIG. 15 shows a cover attaching process. FIG. 16 is an enlarged vertical side view, and FIG. 16 is an enlarged vertical side view of the N portion of FIG. 14 showing a state in which a cover is attached. The fifth embodiment shown in these figures is different from the fourth embodiment in the cover fixing means. That is, the cover fixing portions 35 are attached to the claws 32 provided at both ends of the cover 31 in the XX 'direction. This cover fixing part 3
5 is made of an elastically deformable material, and has a claw 3
The shaft 2 is vertically attached to the shaft 2, and the umbrella is integrally provided at the tip of the shaft. on the other hand,
A claw receiving portion 34 is provided on the inner surface of the end surface of the female metal fitting 7 on the bag portion 16 side. The pawl receiving portion 34 is formed with a stop hole 36 having a diameter smaller than that of the umbrella portion of the cover fixing portion 35.

In FIG. 13, the cover 31 is not shown in cross section, but is hatched for the sake of clarity.

In the fifth embodiment, the umbrella portion of the cover fixing portion 35 attached to the claws 32 at both ends in the XX 'direction of the cover 31 is attached to the end surface of the female metal fitting 7 on the bag portion 16 side. It is pushed into a stop hole 36 formed in the provided claw receiving portion 34, and the umbrella portion of the cover fixing portion 35 is elastically deformed to be inserted into the stop hole 36. The umbrella portion is stopped so as not to escape, and the cover 31 is fixed.

The other structure and operation of the fifth embodiment are the same as those of the fourth embodiment.

Further, FIGS. 17 and 18 show a sixth embodiment of the present invention. FIG. 17 is an enlarged vertical side view of an essential part showing a cover mounting process, and FIG. 18 is an enlarged view with the cover attached. It is a vertical side view. The sixth embodiment shown in FIGS. 17 and 18 also differs from the fourth embodiment in that
The fastening means of the cover is different. That is, the fastening means of the cover of the sixth embodiment is provided with the claws 32 provided at both ends of the cover 31 in the XX 'direction and the bag portion 16 of the female metal fitting 7.
It is configured to have a nail receiving base 38 provided on the end face on the side and a fixing nail 40. A hole 37 for inserting a fixed nail is formed in the claw 32. The claw receiving base 38 is formed in a concave shape, and a projection 39 is provided from the inner bottom surface toward the inside of the segment. This protrusion 39
It is formed in a conical shape whose diameter gradually increases in the ZZ 'direction. The fixing nail 40 has a cross-shaped notch formed in the shaft portion, and the shaft portion is expanded by the protrusion 39.

In the sixth embodiment, when the cover 31 is attached, the claws 32 provided on both ends of the cover 31 in the XX 'direction are provided on the end surface of the female metal fitting 7 on the bag portion 16 side. It is brought into contact with the claw support 38. Then, the shaft portion of the fixed nail 40, which has a cross-shaped notch formed from the inside of the segment, is inserted into the hole 37 formed in the claw 32, and is further forced by the conical projection 39 provided on the claw support 38. The cover 31 is deformed so as not to come out from the claw 32 of the cover 31.

Thus, the cover 31 can be fixed so as not to come off from the connecting portion of the female metal fitting 7 and the male metal fitting 18.

Another structure and operation of the sixth embodiment are as follows.
This is similar to the fourth embodiment.

In the present invention, the fastening means for the cover 31 is not limited to the structures shown in the fourth, fifth and sixth embodiments.

[0058]

As described above, according to the first aspect of the present invention.
According to the invention described above, when viewed from the ZZ 'direction, the inside of each female fitting fixed to the mating surfaces of the segments to be joined to each other and arranged to face each other in the XX' direction,
A wedge-shaped female portion is formed to gradually reduce the distance in the Y-Y 'direction toward the mating surface side, and both side surfaces of the wedge-shaped female portion in the Y-Y' direction are X-oriented toward the Z-Z 'direction. The wedge shape is formed so that the dimension in the −X ′ direction is gradually reduced, and the outer shape of the male fitting is
When pushed over the inside of both female metal fittings of the segment to be joined, it is formed in a shape that fits the wedge-shaped female portion and wedge surface of both female metal fittings, increasing the pushing force of the male metal fitting, When the attracting force of the segments to be joined is increased, both side surfaces of the female mold in the Y-Y 'direction tend to be slightly displaced, but the deformation can be blocked by the reinforced concrete of the segment having a high compression resistance. Since it is possible, increase the pushing force of the male bracket and give a great pulling force to both segments,
As a result of being able to prevent deformation of the female mold, it becomes possible to reduce the thickness and cross-sectional area of both female molds.
Therefore, there is an effect that the size and weight of the entire coupling mechanism can be reduced and the handleability can be improved.

Further, according to the second aspect of the present invention, since the fall prevention means for preventing the male fitting from falling off is provided between the female fitting and the male fitting.
There is an effect that the work of joining the segments can be performed safely.

Further, according to the third aspect of the present invention, the male metal fitting is pushed into the female metal fitting, the two segments are joined together, and then the cover is fitted from the inside of the segment to the joined portion to stop the male fitting. Since it is worn, it is effective in preventing the infiltration of dirt, water, etc. from the joint between the segments.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention and is a cross-sectional front view of a shield tunnel to which a coupling mechanism according to the present invention is applied.

FIG. 2 is a vertical sectional side view taken along line KK of FIG.

FIG. 3 is a perspective view of the coupling mechanism of the first embodiment before coupling the female and male fittings.

FIG. 4 is a vertical sectional side view showing a coupling process in the coupling mechanism of the first embodiment.

FIG. 5 is a vertical cross-sectional side view of the coupling mechanism in the coupling mechanism of the first embodiment.

6 is an enlarged view of an L portion of FIG. 2 and is a plan view of FIG.

FIG. 7 shows a second embodiment of the present invention and is a plan view of a disassembled state of the drop-out preventing means when the male fitting is attached.

8 is a vertical side view of FIG.

9 is an enlarged view of a portion M in FIG.

FIG. 10 shows the third embodiment of the present invention, and is an enlarged side view of the main part of the drop-out preventing means when the male fitting is attached.

FIG. 11 shows a fourth embodiment of the present invention and is a plan view of a cover and its fastening means which are essential parts.

12 is a vertical side view of FIG.

FIG. 13 shows a fifth embodiment of the present invention, and is a plan view of a cover and its fastening means, which are essential parts.

14 is a vertical side view of FIG.

FIG. 15 is an enlarged vertical side view showing a mounting process of the cover shown in FIG.

16 is an enlarged view of a portion N in FIG.

FIG. 17 shows a sixth embodiment of the present invention and is an enlarged vertical side view showing a process of attaching the cover.

FIG. 18 is an enlarged vertical side view showing a state in which a cover is attached in the sixth embodiment.

FIG. 19 is a vertical cross-sectional side view showing a process of pushing the H-shaped metal fitting, showing a conventional technique of a type in which both segments are joined by using a C-shaped metal fitting and an H-shaped metal fitting which are arranged to face each other.

20 is a vertical cross-sectional side view showing a combined state according to the conventional technique shown in FIG.

21 is a plan view of FIG. 20. FIG.

FIG. 22 shows C in the conventional technique shown in FIGS.
It is a top view for explaining the state where the projection of a metallic mold changes.

[Explanation of symbols]

 A, B Segments to be connected to each other 7 Female fitting of segment connecting mechanism 12 Wedge-shaped female portion of female fitting 13, 14 Side surface in YY ′ direction which is wedge surface of wedge-shaped female portion 15 Female fitting Slits 17 Reinforcing bars of female metal fittings 18 Male fittings of the coupling mechanism of segments 19 Constricted parts of male fittings 20 Wedges of male fittings 21, 22 Side surfaces in the YY 'direction which are wedge surfaces of male fittings 24 Fall-out prevention means at the time of mounting a male fitting 25 Teeth row of fall-out prevention means 26 Protrusions of fall-out prevention means 29 Snap plate of fall-out prevention means 31 Cover for connecting portions between segments 32 Claw of fastening means for cover 33 Cover stop Recessing means 34 Cover claw receiving portion 35 Cover fixing means cover fixing portion 36 Cover fixing portion fixing hole 37 Cover fixing means fixing nail insertion hole 38 Cover fixing means nail receiving base 39 Protrusion of Fixing Means for Cover 40 Fixing Nail for Fixing Means for Cover

Claims (3)

[Claims] 1. A support structure of a type in which female metal fittings are fixed near the mating surfaces of the segments to be connected to each other, the male metal fittings are pushed over both female metal fittings, and the mating surfaces are pressed into contact to join the two segments. In the connecting mechanism of the segment for use, the arrangement direction of both the segments to be connected is the XX 'direction, and the direction orthogonal to the XX' direction is the Y-direction.
When the pushing direction of the male fitting with respect to the female fitting in the Y'direction and the thickness direction of the segment is the ZZ 'direction, the inside of each female fitting is seen from the ZZ' direction and is aligned. A wedge-shaped female portion is formed to gradually reduce the distance in the Y-Y 'direction toward the surface side, and both side surfaces of the wedge-shaped female portion in the Y-Y' direction are moved toward the Z-Z 'direction by X-. The wedge-shaped female portion of both female metal fittings is formed when the outer shape of the male metal fitting is formed over the insides of both female metal fittings of the segment to be joined by forming the wedge-shaped surface which gradually reduces the dimension in the X ′ direction. A support segment connecting mechanism characterized by being shaped to fit a wedge surface. 2. The connection of a supporting work segment according to claim 1, further comprising a fall prevention means provided between the female metal fitting and the male metal fitting for preventing the male metal fitting from falling off when the male metal fitting is mounted. mechanism. 3. Pushing male fittings into the female fittings,
3. The connecting mechanism for a supporting structure according to claim 1 or 2, characterized in that, after connecting both segments, a cover which is fitted and fixed from the inside of the segment is attached to the connecting portion.