JP2001146895A - Segment connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide segment connecting structure easily maintaining the mutual joint force heightened state of segments with short-time work by preventing each connecting fitting pushed into a joint fitting, from shifting in a direction of slipping out of the joint fitting. SOLUTION: A bolt member 37 adjustable in its position in the segments 1 being thread-fastened to a support nut member 36 supported to the segments 1, abuts on the connecting fittings 8a, 8b to regulate the movement of the connecting fittings 8a, 8b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of segments that form a cylindrical wall in the axial direction of a drilled hole by connecting a plurality of segments to each other.

[0002]

2. Description of the Related Art As a method of constructing a tunnel, a so-called shield method is generally used, in which a concrete wall is constructed by assembling a concrete segment on the inner surface side of an excavation hole. As the segments used in this shield method, those having a plane rectangular shape and an arc plate shape are mainly used, and these segments are joined to each other by bolts. As a structure for joining the segments with the bolts, a joint plate having holes communicating with each other when the joint surfaces of the segments are brought into contact with each other is buried in the vicinity of the joint surface of the segments, and these joint plates are embedded. Insert the bolt into the hole of
A structure in which a nut is fastened and joined to the bolt is generally used. Further, there is also a structure in which an insert fitting as a nut member is embedded in each segment, and bolts penetrating adjacent segments are fastened to each other for joining.

However, in such a structure, a bolt is inserted into a hole formed in a joint surface of a joint at a construction site, a nut is fastened to the bolt, or a bolt is inserted into an insert fitting embedded in each segment. Therefore, there is a limit in shortening the assembling time, and it is difficult to adapt to automatic assembling by a robot. Furthermore, even if the secondary lining is omitted, it is necessary to close the bolt box formed in the segment in order to install the bolt and nut, and a new joint is aimed at speeding up the construction and saving labor. At present, the development of the structure was urgently needed.

[0004] Here, as a joining structure that allows the segments to be joined very easily, a C-shaped joining bracket is embedded at a position opposing the joining surface of the segments.
By fitting an I-shaped connecting fitting whose both ends are engaged with the pair of these C-shaped connecting fittings, the C-shaped connecting fittings are connected to each other.
A structure has been developed in which the segments are connected by a mold connecting bracket, and the segments are joined by joining the joining surfaces.
Then, in such a segment connection structure, a taper surface is formed in the joint and the joint, and the joint is pulled into the pair of joints by pulling the joint into the pair of joints. It is possible to further increase the joining force between the segments.

[0005]

However, in the conventional segment connecting structure, even if the connecting metal fittings are pushed into the pair of connecting metal fittings and the pair of connecting metal fittings are attracted to each other, the joining strength between the segments is increased. In addition, there is a possibility that the connecting fitting is displaced in the detaching direction with respect to the joining fitting due to vibration or the like during the subsequent work, and the joining force between the segments is weakened. For this reason, it is necessary to fill the gap between the joining fitting and the connecting fitting with a filler such as mortar and fix them, but this work is complicated, and it takes time to solidify the filler. There was a problem. Therefore, an object of the present invention is to easily and quickly maintain a state in which the joining force between the segments is increased by preventing the connecting fitting inserted into the joining fitting from being displaced from the joining fitting in the detaching direction. The purpose of the present invention is to provide a connection structure of the segments that is possible in the above.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a segment connecting structure,
A segment in which two metal fittings each having a pair of hook-shaped locking portions each having an inwardly bent locking piece on each of the bonding surfaces on both sides is arranged on the same straight line, By abutting each other to form two pairs of opposing ones of the joints, and for each pair of these joints,
A connection metal fitting is provided in each of which an engagement portion that is disposed in an engagement space formed between the engagement portions and engages with the engagement piece portion is provided on both sides of a plate-shaped intermediate connection portion. By joining, a pair of the joining fittings is connected to each other, and a support nut member supported by the segment, and a position in the segment is adjusted by being screwed to the support nut member. A bolt member that is made possible and abuts on the connection fitting to restrict the movement of the connection fitting.

Accordingly, a bolt member which can be adjusted in position in the segment by being screwed into a support nut member supported by the segment is a joint member formed by abutting joining surfaces of the segments. It abuts on the connecting fitting inserted into the pair and regulates its movement.

According to a second aspect of the present invention, there is provided the segment connecting structure according to the first aspect, wherein the bolt member is screwed to the support nut member and abutted against one of the connecting fittings to move the bolt. And a contact nut member screwed to the bolt member body and abutting against the other connection fitting to restrict the movement thereof.

Accordingly, the position of the bolt member main body with respect to the support nut member is adjusted to bring the bolt member main body into contact with one of the connection fittings, thereby restricting the movement of the connection fitting, and being screwed to the bolt member body. The position of the contact nut member thus adjusted is adjusted so that the contact nut member comes into contact with the other connection fitting to restrict the movement of the connection fitting.

According to a third aspect of the present invention, there is provided a segment connecting structure according to the second aspect, wherein the connecting fitting comprises:
By moving in the same direction as each other, opposing ones of the joining fittings are attracted to each other, and the bolt member main body is located on the near side in the moving direction in which the opposing ones of the joining fittings of the connecting fitting are attracted to each other. A head through which the rotational force is input is formed at the near side of the connection fitting while being inserted into one of the connection fittings, and the contact nut member is screwed between the connection fitting and the head. It is characterized by being combined.

As described above, the head of the bolt member main body and the abutment nut member are both attached to the front side of one of the connection fittings on the front side in the moving direction of drawing the opposing ones of the connection fittings together. Will be placed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A segment joining structure according to an embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 is a segment. This segment 1 is made of concrete formed in a rectangular shape in plan view and in an arc plate shape in side view. By joining the joining surfaces 2 at the ends in the circumferential direction of these segments 1 to each other, the inside of the excavation hole is formed. A ring constituting the cylindrical wall is constructed. Then, by joining the rings to each other in the axial direction of the excavation hole, a cylindrical wall body is constructed.

The joining surfaces 2 on both sides of these segments 1
The mirrors are mirror-symmetrical to each other, and have shapes as shown in FIGS. That is, a pair of joining grooves 3a and 3b having a rectangular cross section extending in parallel with the axis of the segment 1 are provided on the joining surfaces 2 on both sides at a predetermined distance from each other on the same straight line parallel to the axis of the segment 1. Is formed.

One of the joining grooves 3b has a shape that penetrates the end of the segment 1 on the side opposite to the other joining groove 3a to form a through opening 4, and the other joining groove 3a Has a closed shape in which the opposite side to one joining groove 3b does not penetrate the end of the segment 1.

On the side of the joining groove 3a between the joining grooves 3a and 3b, there is provided a communication groove 5 having a semicircular cross section which is parallel to the axis of the segment 1 and has a smaller sectional area than the joining grooves 3a and 3b. Is formed. In addition, the joining groove 3b is provided between the joining grooves 3a and 3b.
A holding groove portion 6 having a trapezoidal cross section with a smaller cross-sectional area than a and 3b and a larger cross-sectional area than the communication groove portion 5 is formed. Here, the joining grooves 3a, 3b, the communication groove 5, and the holding groove 6 are formed at the center position in the thickness direction (radial direction) of the segment 1.

The joint groove 3a is provided with a C-shaped joint 7a at the end opposite to the communication groove 5, and the joint groove 3b is provided with a C-shaped joint at the end on the holding groove 6 side. Hardware 7
b is provided. The C-shaped joint 7b on the side of the holding groove 6 forms a part of the holding groove 6. Then, the one segment 1 and the other segment 1 are aligned with each other in the axial direction and the radial direction of the excavated hole, and the joint surfaces 2 are abutted against each other, so that a pair of opposing joint grooves 3a is joined. A pair of opposing grooves 3b is formed, and a pair of opposing joints 7a and a pair of opposing joints 7b are formed in these two pairs in total. Further, a pair of pairs of the communication grooves 5 is formed, and a pair of pairs of the holding grooves 6 is formed.

[0017] Then, the I-shaped connecting fitting 8a is joined to the pair of joining fittings 7a to connect the joining fittings 7a to each other, and the I-shaped connecting fitting 8b is joined to the pair of joining fittings 7b. The metal fittings 7b are connected to each other.

As shown in FIG. 6 to FIG.
a and 7b are of the same shape, and a pair of hook-shaped locking portions 11 having locking pieces 10 at their ends are provided so as to face each other. The opposite sides of the locking piece 10 are connected by the connecting portion 12 to form a C shape in a side view. These locking portions 11
A space formed by the connecting portion 12 and closer to the connecting portion 12 than the locking piece 10 is an engaging space 14 in which the engaging portions 13 of the connecting fittings 8a and 8b are engaged.

The locking surface 15 formed by the inner surface of the locking piece 10 is a tapered surface that narrows the engagement space 14 in the direction of insertion of the connecting fittings 8a and 8b. That is, in a state where the joining surfaces 2 of the segments 1 abut against each other, the pair of engaging surfaces 15 of the joining metal fittings 7a facing each other are tapered surfaces that gradually separate toward the back in the insertion direction of the connecting metal fittings 8a. In addition, a pair of locking surfaces 15 of the joining metal fittings 7b facing each other are tapered surfaces that gradually separate from each other in the insertion direction of the connecting metal fittings 8b.

A plurality of, specifically, three projections 17 are arranged on the joining fittings 7a, 7b along the insertion direction of the connecting fittings 8a, 8b.
An anchor muscle connection female thread portion 18 made of a metric screw is formed. Anchor bars 19 are respectively attached to the anchor bar connection female thread portions 18, respectively.
Are connected by being screwed in a state of extending to the opposite side. Anchor bars 1 are attached to the ends of these anchor bars 19.
A support plate 20 that is substantially perpendicular to the axis 9 is integrally formed.

A plurality of ribs 21 are formed on the joints 7a and 7b at a position where the joints 7a and 7b are connected to the anchor bar 19, in a direction intersecting the insertion direction A of the joints 8a and 8b.

The pair of joints 7a, 7b
Are buried in the joint grooves 3a, 3b so that the connecting metal fittings 8a, 8b are inserted in the same direction so as to be located on the same straight line parallel to the axis of the excavation hole, that is, the segment 1. That is, the connecting fitting 8a is inserted into the pair of the joining fittings 7a of the joining groove 3a from the communication groove 5 side, and the through-opening 4 is inserted into the joining fitting 7b of the joining groove 3b.
The connection fitting 8b is inserted from the side toward the communication groove 5 side, in other words, the pair of the connection fittings 7a of the connection groove 3a is configured such that the locking surface 15 formed by the inner surface of the locking piece 10 is connected to the communication groove portion. So that the engagement space 14 becomes narrower as the distance from
The pair of joining fittings 7b of the joining groove 3b is arranged such that the engaging surface 15 formed by the inner surface of the engaging piece 10 becomes narrower as the engaging surface 15 approaches the communication groove 5.

The connecting fittings 8a and 8b for connecting the pair of joining fittings 7a between the segments 1 are formed in an I-shaped cross section as shown in FIGS. As described above, the joints 7a, 7b
The engagement portion 13 is fitted into the engagement space 14 of the first embodiment.
The coupling intermediate portion 31 is formed to be thinner than the gap between the locking pieces 10 of the locking portion 11 constituting the metal fittings 7a and 7b and can be inserted therethrough. 10 are formed to be thicker than the gap between them.

The locking piece 10 of the joining metal fittings 7a, 7b
The engagement surface 32 formed on the engagement portion 13 of the connection fittings 8a and 8b that comes into contact with and engages with the locking surface 15 of the connection fitting 7a, 8b.
7b, the engagement portion 1 is closer to one end side.
3 is a tapered surface in which the engaging surfaces 32 facing each other are gradually separated from each other. The connection fitting 8a has an engaging portion 1
3 is inserted into the joining metal fitting 7a with the narrow side as the front side and the wide side of the engagement space 14 as the entrance side. Similarly, the connecting fitting 8b is inserted into the joining fitting 7b with the narrow side of the engaging portion 13 as the front side and the wide side of the engaging space 14 as the entrance side.

The connecting fitting 8a moves in the direction away from the communication groove 5 to attract the opposing joint fittings 7a to each other, and the connecting fitting 8b moves in the direction approaching the communication groove 5. , The opposing members of the joint fitting 7b are moved in the direction of attracting each other. As a result, the connecting bracket 8
By moving in the same direction, a and 8b attract the opposing members of the joint 7a and the opposing members of the joint 7b.

Here, one of the connection fittings 8a and 8b has a projection 33 formed on the connection intermediate portion 31 on the side where the width of the engaging portion 13 is wide. In the connection intermediate portion 31 including the through hole 33, a through hole 34 is provided at a center position between the engagement portions 13 and in a center position in the thickness direction.
Are formed.

In this embodiment, FIG.
As shown in FIG. 1, a substantially hexagonal column-shaped support which is supported in a substantially fixed state on the pair of segments 1 by being fitted into the holding groove 6 having a hexagonal cross section by opposing the pair of segments 1. By being screwed to the nut member 36 and the support nut member 36, the position in the segment 1 can be adjusted by rotating, and furthermore, it comes into contact with the connection fittings 8 a and 8 b to move the connection fittings 8 a and 8 b. Is provided.

The bolt member 37 is a bolt member main body 43 having a screw shaft portion 41 in which a male screw 40 is formed over the entire length, and a substantially hexagonal prism-shaped head portion 42 to which a rotational force is input.
And the screw shaft 41 is connected to the connection fittings 8a and 8b.
One of the connecting metal fittings 8b on the front side in the moving direction in which the opposing metal fittings 7a and 7b are attracted to each other.
The head 4 is inserted into the through hole 34 at the front side of the connection fitting 8b.
2 will be inserted in a state where it is arranged. A screw shaft portion 41 protruding from the connection fitting 8b toward the connection fitting 8a.
By screwing into the support nut member 36, the axial position with respect to the support nut member 36 can be adjusted by rotating, and the end of the screw shaft portion 41 on the opposite side to the head 42. As a result, the movement comes into contact with one of the connection fittings 8a to restrict the movement thereof.

The bolt member 37 is screwed into the screw shaft portion 41 between the connection fitting 8b of the bolt member main body 43 and the head portion 42, and is rotated in the axial direction with respect to the bolt member main body 43. It has a substantially hexagonal column-shaped contact nut member 44 that is adjustable in position and abuts on the connection fitting 8b to restrict its movement.

Next, the case of joining the segments 1 will be described with reference to FIGS. In the following description, in the axial direction of the excavation hole, the side on which the shield machine for excavating the ground is provided is referred to as the cutting face side, and the opposite side, that is, the side on which the wellhead of the excavation hole is disposed is the wellhead side. Called.

In this case, the segment 1 (1A) is installed on the face side of the existing ring 45, which is already annularly constructed with the segment 1 in the excavation hole.
Next, the case where the next segment 1 (1B) is joined in the circumferential direction will be described. In addition, the segment 1 always has the joining groove 3a side not penetrating in the axial direction with the existing ring 45.
It is constructed so as to be placed on the side, that is, on the wellhead side.

As shown in FIG. 12, segment 1 (1
The following processing is performed on B). That is, segment 1
(1A) is aligned with the axial direction, and the next segment 1 (1B) immediately before joining in which the joining surface 2 joined to the joining surface 2 faces the joining surface 2 of the segment 1 (1A), the segment 1 The wellhead-side connecting groove 8a formed on the joining surface 2 to be joined to (1A) is connected to the wellhead-side connecting metal fitting 8a at a portion closer to the cutting face than the wellhead-side metal fitting 7a.
To move the connection fitting 8a on the wellhead side to the wellhead side. In this case, as described above, the connection metal fitting 8a on the wellhead side where the through hole is not formed is inserted into the bonding metal fitting 7a from the side where the width of the engaging portion 13 is narrow. As a result, one engaging portion 13 of the wellhead-side connection metal fitting 8a is inserted into the engaging space 14 of the wellhead-side joining metal fitting 7a, and the other engaging portion 13 protrudes from the wellhead-side joining metal fitting 7a. Will be.

On the other hand, the screw shaft portion 41 of the bolt member body 43
The bolt member 37 is prepared in a state where the contact nut member 44 is screwed to the vicinity of the head portion 42, and the screw shaft portion 41 of the bolt member 37 is set to the cutting blade side. After the bolt member 37 is inserted through the through hole 34,
By screwing the support nut member 36 to the screw shaft portion 41 on the opposite side to the head portion 42 and the contact nut member 44, the bolt member 37 and the support nut member 36 are attached to the cutting-face-side connecting fitting 8b. deep. At this time,
The bolt member 37 and the support nut member 36 are attached such that the support nut member 36 is located on the side where the width of the engaging portion 13 of the connection fitting 8b is narrow.

Then, such a connecting metal fitting 8 on the cutting face side.
When b is inserted into a portion closer to the face than the face-side joining metal fitting 7b of the face-face-side joining groove 3b formed on the joining surface 2 joined to the segment 1 (1A) of the segment 1 (1B). At the same time, the support nut member 36 is fitted into the holding groove portion 6 connected to the joining groove portion 3b, and the portion of the screw shaft portion 41 projecting from the support nut member 36 is fitted into the communication groove portion 5 connected to the holding groove portion 6.

Next, the connecting metal fitting 8b on the face side is moved to the wellhead side, and is inserted into the joining metal fitting 7b on the face side from the side where the width of the engaging portion 13 is narrow. As a result, one engaging portion 13 of the connecting face 8b on the face side is inserted into the engaging space 14 of the joining piece 7b on the face side, and the other engaging portion 13 is connected to the joining piece 7b on the face side. From the projection. Then, by rotating the bolt member 37 with respect to the support nut member 36 and moving it toward the wellhead side, the bolt member 3
7 is connected to the connection metal fitting 8a on the wellhead side.
In order to prevent the joint 7a from coming off. Further, as shown in FIG. 13, in this state, only the contact nut member 44 of the bolt member 37 is moved to the wellhead side, and this is brought into contact with the connecting metal fitting 8b on the cutting face side. Try to keep it from falling out.

At this point, the connection metal fitting 8 on the wellhead side is used.
The position of the bolt member main body 43 is adjusted so that a is inserted by a minimum insertion amount so that the a does not fall off from the joint fitting 7a on the wellhead side. The position of the abutment nut member 44 is adjusted so as to be in a state of being inserted by a minimum insertion amount that does not fall off from the joint fitting 7b.

The segments 1 (1A) and 1 (1B) prepared as described above are joined as follows. That is, as shown in FIG. 13, the segment 1 (1A) is provided with a segment 1 at a portion closer to the face than the face-side joint metal fitting 7b of the face-side joining groove 3b.
The projecting portion of the connecting fitting 8b on the face side of (1B) is inserted, and the joining groove 3a on the wellhead side of the segment 1 (1A).
The segment 1 (1A) and the segment 1 (1B) are respectively inserted into the portion of the segment 1 (1B) that is closer to the cutting face than the joining metal fitting 7a on the wellhead side, while the protruding portion of the connection metal fitting 8a on the wellhead side of the segment 1 (1B) is inserted. Are made to face each other with a slight gap.

Next, in this state, segment 1 (1B)
To the wellhead side. Then, segment 1 (1B)
The connecting face 8b on the face side and the connecting piece 8a on the wellhead side that have been set at the same time move integrally with the segment 1 (1B), and the engaging portion 13 of the connecting face 8b on the face side moves into the segment 1 (1A). ), The engaging space 1 of the joining metal fitting 7b on the face side.
4 and the engaging portion 13 of the wellhead-side connection metal fitting 8a is connected to the wellhead-side joining metal fitting 7 of the segment 1 (1A).
14A, the segment 1 (1B) is moved until the segment 1 (1B) comes into contact with the existing ring 45, and then the segment 1 (1A) and the segment 1 (1B) as shown in FIG. Are butted against each other.

As a result, the pair of the joining metal fittings 7a on the wellhead side and the pair of the joining metal fittings 7b on the cutting face side of both segments 1 are aligned with each other, and the support nut member 36 It is housed in both holding grooves 6 and is in a substantially fixed state, and furthermore, the connecting face 8b on the face side is partially inserted into the pair of joining fittings 7b on the face side, and the connecting piece 8a on the wellhead side is It will be in the state where it was partially inserted into the pair of joining fittings 7a. Segment 1
The reason why the segment 1 (1B) is moved while being slightly separated from the joining surface 2 of (1A) is that the support nut member 36 interferes with the joining metal fitting 7b on the face of the segment 1 (1A).

Then, from this state, as shown in FIG. 14, only the contact nut member 44 of the bolt member 37 is moved to the cutting face side, and this is separated from the connecting fitting 8b on the cutting face side. Next, as shown in FIG. 15, the bolt member 37 is rotated by inputting to the head 42 on the face of the cutting face of the bolt member 37, and the bolt member 37 takes a reaction force with the support nut member 36 while taking a reaction force. It is moved to the wellhead side, and the connection metal fitting 8 on the wellhead side opposite to the head 42 of the bolt member 37.
a into the wellhead side. Then, the connection fitting 8a on the wellhead side
As a whole are simultaneously inserted into the pair of wellhead side joint fittings 7a, and the engaging portions 13 are fitted into the engagement spaces 8 of the wellhead side joint fittings 7a, and the wellhead side joint fittings 7a
Will be connected. In other words, the engagement surface 32 of the engagement portion 13 of the wellhead-side connection fitting 8a formed of a tapered surface comes into contact with the engagement surface 15 of the engagement piece 10 of the wellhead-side joining metal fitting 7a and slides. As a result, the joining metal fittings 7a on the wellhead side are drawn together and joined.

Next, the bolt member main body 43 is left as it is,
As shown in FIG. 16, only the contact nut member 44 is rotated, and the contact nut member 44 is moved to the wellhead side while receiving a reaction force from the joint fitting 7 b via the support nut member 36, and the contact nut member 44 is rotated. At 44, the connecting fitting 8b on the cutting face side is pushed into the wellhead side. Then, the connecting face 8b on the face side as a whole is simultaneously inserted into the pair of the connecting face 7b on the face side, and the engaging portion 13 is inserted into the engaging space 8 of the connecting piece 7b on the face side. By fitting, the pair of the joining metal fittings 7b on the face side is connected. That is, the engaging surface 32 of the engaging portion 13 of the connecting metal member 8b on the face side abuts on the locking surface 15 of the engaging piece portion 10 of the joining metal member 7b on the face side. By sliding, the joining metal fittings 7b on the face side are drawn together and joined. As described above, segment 1
(1A) and the segment 1 (1B) are joined.

According to the above embodiment, the bolt member 37
Is composed of a bolt member main body 43 and a contact nut member 44, and the support nut member 36 supported by the segment 1.
By adjusting the position of the bolt member main body 43 screwed into the hole, the bolt member main body 43 comes into contact with the wellhead-side connection fitting 8a to push the connection fitting 8a into the pair of wellhead-side joining fittings 7a and move the same. At the same time, by adjusting the position of the contact nut member 44 screwed to the bolt member main body 43, the contact nut member 44 abuts on the connecting metal member 8b on the cutting blade side to cut the connecting metal member 8b. It pushes into the pair of wing-side joining fittings 7b and regulates its movement. Therefore, the two connecting fittings 8a, 8a, which are respectively inserted into the pair of joining fittings 7a and the pair of joining fittings 7b
8b can be prevented from moving in the removal direction, and the state in which the joining force between the segments 1 is increased can be maintained easily and in a short time.

The head portion 42 of the bolt member main body 43 and the contact nut member 44 are the cutting faces on the front side in the moving direction in which the connecting metal members 7a, 7b of the connecting metal members 8a, 8b attract each other. It is arranged together on the near side of the side connection fitting 8b. Therefore,
Position adjustment of the bolt member main body 43 and the contact nut member 44 can be easily performed.

[0044]

As described above, according to the segment connecting structure of the first aspect of the present invention, the position in the segment can be adjusted by being screwed to the support nut member supported by the segment. The set bolt member abuts on the connecting fitting inserted into the pair of joining fittings formed by abutting the joining surfaces of the segments to restrict the movement thereof. Therefore, it is possible to easily and quickly maintain the state in which the joining force between the segments is increased by preventing the connecting fitting inserted into the joining fitting from being displaced from the joining fitting in the detaching direction.

According to the segment connecting structure of the second aspect of the present invention, the position of the bolt member main body with respect to the support nut member is adjusted, and the bolt member main body is brought into contact with one of the connecting metal members, so that the connecting metal member is connected. In addition to restricting the movement, the position of the contact nut member screwed to the bolt member main body is adjusted, and the contact nut member is brought into contact with the other connecting metal member, thereby restricting the movement of the connecting metal member. Therefore, it is possible to easily and quickly maintain the state in which the joining force between the segments is increased by preventing the connecting fittings inserted into the joining fitting from being displaced from the joining fitting in the detaching direction. Become.

According to the segment connecting structure of the third aspect of the present invention, the head of the bolt member main body and the abutment nut member are on the near side in the moving direction in which the opposite ones of the connecting fittings of the connecting fitting are attracted to each other. Are arranged together on the near side of one of the connecting fittings. Therefore, the position adjustment of the bolt member main body and the contact nut member can be easily performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one of joining points of segments according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of another joining point of the segments according to the embodiment of the present invention.

FIG. 3 is a perspective view of one joining point of the segments according to the embodiment of the present invention.

FIG. 4 is a plan cross-sectional view of one joining point of the segments according to the embodiment of the present invention.

FIG. 5 is a side sectional view of one joining point of the segments according to the embodiment of the present invention.

FIG. 6 is a plan view of a fitting used for joining the segments according to the embodiment of the present invention.

FIG. 7 is a side view of a joint used for joining the segments according to the embodiment of the present invention.

FIG. 8 is a rear view of the joint fitting used for joining the segments according to the embodiment of the present invention, from which an anchor streak is removed.

FIG. 9 is a perspective view of one connecting fitting used for joining the segments according to the embodiment of the present invention.

FIG. 10 is a perspective view of the other connecting fitting used for joining the segments according to the embodiment of the present invention.

FIG. 11 is a plan view of a connection fitting, a support nut member, and a bolt member used for joining the segments according to the embodiment of the present invention.

FIG. 12 is a cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

FIG. 13 is a cross-sectional view of a joining portion between the segments for explaining a joining procedure between the segments according to the embodiment of the present invention.

FIG. 14 is a partially enlarged cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

FIG. 15 is a partially enlarged cross-sectional view of a joining portion between segments for describing a joining procedure between segments according to the embodiment of the present invention.

FIG. 16 is a partially enlarged cross-sectional view of a joining portion between segments for explaining a joining procedure between segments according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Segment 2 Joint surface 3a, 3b Joint groove 7a, 7b Joint metal 8a, 8b Connection metal 10 Lock piece 11 Lock part 13 Engagement part 14 Engagement space 31 Connection middle part 36 Support nut member 37 Bolt member 40 Male screw 42 head 43 bolt member main body 44 contact nut member

Claims (3)

[Claims] 1. A segment in which two joining fittings having a pair of hook-shaped engaging portions each having an inwardly bent engaging piece portion on each of joining surfaces on both sides are arranged on the same straight line. The joining surfaces are abutted against each other to form two pairs of opposed metal fittings, and each pair of the metal fittings has an engagement formed between the locking portions. A pair of connecting metal fittings is formed by connecting connecting metal fittings, which are arranged in a space and are provided on both sides of a plate-like connecting intermediate part with engaging portions that engage with the locking pieces. And a support nut member supported by the segment, and a position in the segment can be adjusted by being screwed to the support nut member so that the support nut member abuts on the connection fitting. Bolt that regulates the movement of the connection bracket Coupling structure of the segment; and a timber. 2. The bolt member, which is screwed to the support nut member and abuts on one of the connection fittings to regulate the movement thereof, and is screwed to the bolt member body to form the other of the other. The segment connecting structure according to claim 1, further comprising a contact nut member that contacts the connection fitting to restrict movement thereof. 3. The connecting metal fittings move in the same direction to attract the opposing ones of the joining metal fittings, and the bolt member main body opposes the joining metal fittings of the connecting metal fittings. A head to which a rotational force is input is formed on the near side of the connection fitting while being inserted into one of the connection fittings on the near side in the moving direction of attracting each other, and the connection fitting and the head are connected to each other. The segment connecting structure according to claim 2, wherein the contact nut member is screwed between the segments.