JP2017089179A - Connector and method for connecting segments - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple connector for connecting segments.SOLUTION: A connector 40 for connecting segments 11 and 12 respectively having connecting surfaces 11a, 12a facing each other for lining a tunnel includes: a plate member 30 projecting orthogonal to the connecting surface 12a of the segment 12 and having a through engagement hole 31, an opening 20 formed in the connecting surface 11a of the segment 11 for accepting the plate member 30, and an engagement member 21 formed in the segment 11 for engaging with the engagement hole 31 while the plate member 30 is disposed in the opening 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connecting tool for connecting and fixing segments for tunnel lining, and a method for connecting the segments using the connecting tool.

Shield tunnels used as pipelines for water and sewage systems, common grooves, roads, railways, etc. are formed by a shield method.
In the shield method, for example, a start shaft and a reach shaft are built in the ground, and the tunnel is excavated with a shield machine from the start shaft to the reach shaft, while the tunnel lining is used one after another at the rear of the shield machine. These segments (hereinafter simply referred to as “segments”) are assembled in the tunnel circumferential direction to construct a segment ring, and adjacent segment rings are connected in the tunnel axial direction to construct a cylindrical lining body. In other words, the above-described covering body is constructed by connecting a plurality of segments in the tunnel circumferential direction and the tunnel axis direction.

In this regard, Patent Document 1 discloses an example of a connector used for connecting segment rings.
The connector disclosed in Patent Document 1 connects members made of concrete or the like, and includes a male connector fitting provided on one member and a female connector fitting fixed to the other member. ing. The male connection fitting has a plate-like connection piece protruding from the joining end surface of the one member. The female connection fitting is formed with a flat connection piece insertion chamber into which the connection piece of the male connection fitting is inserted. In addition, the female coupling fitting is provided with a pair of locking members that sandwich the coupling piece inserted into the coupling piece insertion chamber and prevent the coupling piece from coming off.

JP 2001-254712 A

By the way, about the connector for connecting segments, simplification of the structure (for example, reducing the number of components) is desired.
In this regard, the connector as disclosed in Patent Document 1 has a large number of constituent parts and a complicated structure, and thus simplification of the structure has been demanded.
In view of such a situation, the present invention has an object to provide a connector having a simple configuration.

  Therefore, the connection tool in the first aspect of the present invention is for connecting and fixing the tunnel lining segments having connection surfaces facing each other, protruding vertically from the connection surface of one segment, and A projecting member having an engagement hole formed therethrough, an opening recessed in the connecting surface of the other segment and into which the projecting member can be inserted, provided in the other segment, and in the opening An engaging member that can be engaged with the engaging hole in a state in which the convex member is inserted.

  In the segment coupling method according to the second aspect of the present invention, in the coupling tool according to the first aspect, the convex member is a plate-shaped member, the opening has a rectangular parallelepiped internal space, and the engagement member Is rod-shaped. The connector is provided in the other segment, opens facing the internal space, and has a bottomed cylindrical housing member capable of housing at least the base end portion of the engaging member; and the housing And a biasing member interposed between a bottom portion of the member and a base end portion of the engagement member and biasing the engagement member from the housing member toward the inner space. The connecting method of the segments is to cause the distal end portion of the engaging member to protrude from the housing member into the internal space by the urging force from the urging member, and to use the convex member inserted into the internal space. The engaging member is pressed against the urging force, and a distal end portion of the pressed engaging member is inserted into the engagement hole by the urging force, and the engaging member is engaged with the engaging member. Engaging the abutment.

  In the segment coupling method according to the third aspect of the present invention, in the coupling tool according to the first aspect, the convex member is a plate-shaped member, the opening has a rectangular parallelepiped internal space, and the engagement member Is rod-shaped. The connector is provided in the other segment, opens facing the internal space, and has a bottomed cylindrical housing member capable of housing at least the base end portion of the engaging member; and the housing An urging member interposed between a bottom portion of the member and a base end portion of the engaging member to urge the engaging member from the housing member toward the internal space; and And an interposition member interposed between the distal end portion and the inner surface of the opening facing the distal end portion. The connecting method of the segment is that the interposition member is disposed between the front end portion of the engagement member and the inner surface, and the interposition member is pressed by the convex member inserted into the internal space. The intervention member is separated from the distal end portion of the engagement member, the engagement member is pressed against the urging force from the urging member by the convex member, and the pressed engagement A distal end portion of the combined member is inserted into the engagement hole by the urging force, and the engagement member is engaged with the engagement hole.

  According to the present invention, the engaging member is engaged with the engaging hole of the convex member in a state where the convex member of one segment is inserted into the opening of the other segment. Thereby, since segments can be connected and fixed by engagement of the engaging hole of the convex member and the engaging member, the connecting tool can be made simple. Further, the engagement member is engaged with the engagement hole of the convex member, so that the convex member can be easily prevented from coming off from the opening.

The figure which shows schematic structure of the segment in 1st Embodiment of this invention. The figure which shows schematic structure of the coupling tool in the said 1st Embodiment. The figure which shows the connection method of the segment in the said 1st Embodiment. The figure which shows the connection method of the segment in the said 1st Embodiment. The figure which shows schematic structure of the coupling tool in 2nd Embodiment of this invention. The figure which shows the connection method of the segment in the said 2nd Embodiment. The figure which shows schematic structure of the coupling tool in 3rd Embodiment of this invention. The figure which shows the connection method of the segment in the said 3rd Embodiment. The figure which shows the connection method of the segment in the said 3rd Embodiment. The figure which shows the connection method of the segment in the said 3rd Embodiment. The figure which shows schematic structure of the coupling tool in 4th Embodiment of this invention. The figure which shows schematic structure of the coupling tool in the said 4th Embodiment. The figure which shows the connection method of the segment in the said 4th Embodiment. The figure which shows the connection method of the segment in the said 4th Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1A is a perspective view showing a schematic configuration of a segment in the first embodiment of the present invention. FIG. 1B is a plan view showing a schematic configuration of the segment in the present embodiment, and is a view of the segment as viewed from the natural ground side. FIG. 2A is a cross-sectional view illustrating a schematic configuration of the coupler in the present embodiment. FIG. 2B is a cross-sectional view taken along the line II of FIG. FIG.2 (C) is a front view of the female coupling part which comprises a connection tool.

  In the shield method, as the shield machine (not shown) digs, an arc segment (for example, segment 1 shown in FIG. 1) is assembled in the tunnel circumferential direction to construct a segment ring (not shown), A cylindrical lining body is constructed by connecting adjacent segment rings in the tunnel axis direction. The segment constituting the lining body (for example, segment 1 shown in FIG. 1) can be an RC segment mainly made of concrete, a steel segment mainly made of steel, or a synthetic segment mainly made of concrete and steel.

  In the present embodiment, a connection tool for connecting and fixing adjacent segment rings will be described as a connection tool for connecting and fixing adjacent segments. That is, the connector in the present embodiment is for connecting and fixing the segments having connecting surfaces facing each other in the tunnel axis direction.

  Further, in the following description, the surface constituting the inner surface (inner wall surface) of the shield tunnel covering body is referred to as “inner surface” among the arc-shaped segments, while the outer surface (ground surface side surface) of the shield tunnel covering body is referred to as “inner surface”. ) Is referred to as the “outer surface”.

  As shown in FIGS. 1 and 2, the segment 1 is provided with a plurality (four in FIG. 1) of female joint portions 2 on the face side end face, and a plurality (FIG. 1) on the well side end face. Then, four male joint portions 3 are provided. FIG. 1 shows a segment 1 provided with four female joint portions 2 and four male joint portions 3, but the female joint portion 2 and the male joint provided in the segment 1 are illustrated. The number of parts 3 is not limited to this. Moreover, in this embodiment, although demonstrated below that the segment 1 is a product made from concrete, the kind of segment 1 is not restricted to this.

  The segment 11 shown in FIG. 2 constitutes an existing segment ring (not shown), and has the same configuration as the segment 1 described above, for example. Also, the segment 12 shown in FIG. 2 is connected to an existing segment ring (not shown), and has the same configuration as the segment 1 described above, for example. Here, the segment 12 corresponds to “one segment” of the present invention. The segment 11 corresponds to the “other segment” of the present invention.

The connection tool 40 in this embodiment is for connecting and fixing the segments 11 and 12 having the connection surfaces 11a and 12a facing each other.
The connector 40 includes a female joint portion 2 provided in the segment 11 and a male joint portion 3 provided in the segment 12.

The female joint portion 2 of the segment 11 includes an opening 20, an engagement member 21, a housing member 22, and a coil spring 23.
The opening 20 is recessed in the connecting surface 11a of the segment 11, and has a rectangular parallelepiped internal space 20a. The opening part 20 can insert an exposed part including the tip part 30b in the plate-like member 30 described later.

The engaging member 21 is rod-shaped and the cross-sectional shape is circular. In addition, the cross-sectional shape of the engaging member 21 is not limited to a circular shape, and may be an elliptical shape or a rectangular shape, for example. The engaging member 21 is made of resin, for example.
The housing member 22 has a bottomed cylindrical shape, and opens toward the internal space 20 a of the opening 20. The accommodating member 22 extends in the tunnel radial direction, and the bottom portion 22a is located on the inner side in the tunnel radial direction (the inner surface side of the segment 11) than the internal space 20a. The housing member 22 is made of resin, for example.

The accommodating member 22 can accommodate at least the base end portion 21 a of the engaging member 21.
The coil spring 23 corresponds to the “biasing member” of the present invention. The coil spring 23 is interposed between the bottom portion 22 a in the housing member 22 and the base end portion 21 a of the engagement member 21. The coil spring 23 urges the engaging member 21 from the housing member 22 toward the internal space 20a by its elastic force.

  An inclined surface 21 c is formed at the distal end portion 21 b of the engaging member 21. The inclined surface 21 c is inclined so as to be separated from the coil spring 23 as the distance from the connecting surface 11 a of the segment 11 increases. In other words, the inclined surface 21c is inclined so as to be directed toward the outer side in the tunnel radial direction (the outer surface side of the segment 11) as the distance from the connecting surface 11a of the segment 11 increases.

The male joint portion 3 of the segment 12 is configured by a rectangular plate-shaped member 30. Here, the plate member 30 corresponds to the “convex member” of the present invention.
The plate-like member 30 extends perpendicularly from the connecting surface 12a of the segment 12. The plate-like member 30 is formed with an engagement hole 31 penetrating the plate-like member 30 in the thickness direction (tunnel radial direction). The engagement hole 31 is sized to allow the engagement member 21 to be inserted. In this embodiment, the cross-sectional shape of the engagement hole 31 is an elliptical shape with the tunnel circumferential direction as the major axis. However, the cross-sectional shape of the engagement hole 31 is not limited to this, for example, a circular shape or a rectangular shape. It may be. The plate member 30 is made of metal, for example.

  The plate-like member 30 has a base end portion 30a fixed in the segment 12, and a tip end portion 30b protruding from the connecting surface 12a toward the wellhead. An inclined portion 30 c is formed at a portion on the inner side in the tunnel radial direction at the distal end portion 30 b of the plate-like member 30. The inclined portion 30c is inclined corresponding to the aforementioned inclined surface 21c. The inclined portion 30c is inclined so as to be directed toward the outer side in the tunnel radial direction (the outer surface side of the segment 12) as the distance from the connecting surface 12a increases.

2A and 2B, the movement direction α in the internal space 20a of the plate-like member 30 of the segment 12 indicated by the one-dot chain line arrow is “inside the convex member of the present invention. This corresponds to the “movement direction in space”. Further, in FIGS. 2A and 2B, the direction from the left side to the right side of the page (that is, from the face side to the wellhead side) is “in the direction of movement of the convex member in the internal space”. Corresponding to “from the near side to the far side”.
Therefore, the inclined surface 21c formed at the distal end portion 21b of the engagement member 21 is closer to the rear side in the movement direction α in the internal space 20a of the plate-like member 30 inserted into the opening 20 ( That is, it is inclined so as to be away from the coil spring 23 as it goes from the face side to the wellhead side (see FIG. 2A).

  In the present embodiment, of the plate-like member 30, an inclined portion is formed on at least a part of the region that can contact the distal end portion 21 b of the engagement member 21 when the plate-like member 30 is inserted into the opening 20. 30c is formed. The inclined portion 30c is inclined so as to taper from the front side to the back side in the movement direction α in the internal space 20a of the plate-like member 30 (that is, from the face side to the wellhead side) ( (See FIG. 2A).

Next, a method for connecting the segments 11 and 12 will be described with reference to FIGS.
3 and 4 show a method of connecting the segments 11 and 12 using the connector 40.
Prior to connecting the segment 12 to the segment 11, in the female joint portion 2 of the segment 11, the distal end portion 21 b of the engaging member 21 protrudes from the housing member 22 into the internal space 20 a due to the biasing force from the coil spring 23. (See FIG. 3A). In this embodiment, at this time, the distal end portion 21b of the engaging member 21 contacts the inner wall 20b on the outer side in the tunnel radial direction of the opening portion 20. However, the tunnel of the opening portion 20 can also be provided without this contact. The distal end portion 21b of the engaging member 21 may be positioned in the vicinity of the radially outer inner wall 20b.

  When connecting the segments 11 and 12, as shown in FIGS. 3A, 3B, and 4A, the connecting surface 12a of the segment 12 is brought close to the connecting surface 11a of the segment 11, and the segment 12 While the plate-like member 30 of the male joint portion 3 of the segment 11 is inserted into the internal space 20 a of the opening 20 of the female joint portion 2, the engaging member of the female joint portion 2 of the segment 12 is inserted by the plate-like member 30. 21 is pressed against the biasing force from the coil spring 23. Thereby, the engaging member 21 is accommodated in the accommodating member 22 so as to avoid the plate member 30 (see FIG. 4A). At this time, the plate member 30 presses the engagement member 21 while the inclined portion 30c of the plate member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other (FIG. 3B and FIG. 4A). The engaging member 21 can be smoothly accommodated in the accommodating member 22.

When the insertion of the plate-like member 30 into the internal space 20a is further continued, as shown in FIG. 4B, the tip portion 21b of the engagement member 21 is pressed by the biasing force from the coil spring 23. The engagement member 21 is inserted into the engagement hole 31 of the plate 30, and the engagement member 21 is engaged with the engagement hole 31 of the plate-like member 30.
In this way, the segments 11 and 12 are connected and fixed via the connector 40.

  According to the present embodiment, the connecting tool 40 for connecting and fixing the tunnel lining segments 11 and 12 having the connecting surfaces 11a and 12a facing each other is the connecting surface 12a of the segment 12 (one segment). The plate-like member 30 (convex-like member) that protrudes vertically from the engagement hole 31 and the plate-like member 30 (convex-like shape) are provided in the connecting surface 11a of the segment 11 (the other segment). Member 20 is inserted into the opening 20 and the segment 11 (the other segment), and is engaged with the engagement hole 31 in a state where the plate-like member 30 (convex member) is inserted into the opening 20. A possible engaging member 21. Thereby, since the segments 11 and 12 can be connected and fixed by engagement of the engagement hole 31 of the plate-shaped member 30 and the engagement member 21, the connector 40 can be made into a simple structure. In addition, the engagement member 21 is engaged with the engagement hole 31 of the plate-like member 30, so that the male joint portion 3 can be easily prevented from coming off from the female joint portion 2.

  Moreover, according to this embodiment, the opening part 20 has the rectangular parallelepiped internal space 20a, and the engaging member 21 is rod-shaped. The connector 40 is provided in the segment 11 (the other segment), opens facing the internal space 20a, and has a bottomed cylindrical housing member 22 capable of housing at least the base end portion 21a of the engaging member 21. And a coil spring 23 (which is interposed between the bottom 22a of the housing member 22 and the base end 21a of the engaging member 21 and biases the engaging member 21 from the housing member 22 toward the internal space 20a. An urging member). Thereby, the female joint part 2 of the coupler 40 can be made into a simple structure.

  Moreover, according to this embodiment, the inclined surface 21c is formed in the front-end | tip part 21b of the engaging member 21, and this inclined surface 21c is a coil spring, so that it leaves | separates from the connection surface 11a of the segment 11 (other segment). It inclines so that it may leave | separate from 23 (biasing member). Accordingly, the plate member 30 presses the engagement member 21 while the inclined portion 30c of the tip portion 30b of the plate member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other (FIG. 3B and FIG. 3). 4 (A)), the engaging member 21 can be smoothly accommodated in the accommodating member 22.

  Moreover, according to this embodiment, the plate-shaped member 30 (convex-shaped member) has the inclined part 30c which inclines corresponding to the inclined surface 21c in the front-end | tip part 30b. Accordingly, the plate member 30 presses the engagement member 21 while the inclined portion 30c of the tip portion 30b of the plate member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other (FIG. 3B and FIG. 3). 4 (A)), the engaging member 21 can be smoothly accommodated in the accommodating member 22.

  Further, according to the present embodiment, the inclined surface 21 c is formed at the distal end portion 21 b of the engaging member 21, and the inclined surface 21 c is the plate-like member 30 (convex member) inserted into the opening 20. As it moves from the near side to the far side in the movement direction α in the internal space 20a, it is inclined so as to be separated from the coil spring 23 (biasing member). Accordingly, the plate member 30 presses the engagement member 21 while the inclined portion 30c of the tip portion 30b of the plate member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other (FIG. 3B and FIG. 3). 4 (A)), the engaging member 21 can be smoothly accommodated in the accommodating member 22.

  Moreover, according to this embodiment, when the plate-shaped member 30 (convex-shaped member) of the plate-shaped member 30 (convex-shaped member) is inserted into the opening 20, it contacts the distal end portion 21 b of the engaging member 21. An inclined portion 30c is formed in at least a part of the possible region, and this inclined portion 30c is formed from the near side to the far side in the movement direction α in the internal space 20a of the plate-like member 30 (convex member). It is inclined to taper toward. Accordingly, the plate member 30 presses the engagement member 21 while the inclined portion 30c of the tip portion 30b of the plate member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other (FIG. 3B and FIG. 3). 4 (A)), the engaging member 21 can be smoothly accommodated in the accommodating member 22.

  Further, according to the present embodiment, the accommodating member 22 and the coil spring 23 (biasing member) are located on the inner side in the tunnel radial direction from the opening 20 in the segment 11 (the other segment). Thereby, for example, when the segments 11 and 12 are erroneously connected to each other and it is necessary to separate the male joint portion 3 from the female joint portion 2 of the connector 40, The engaging member 21 can be detached from the engaging hole 31 of the plate-like member 30 by removing concrete from the inside of the tunnel and removing the accommodating member 22 and the coil spring 23 from the inside of the tunnel.

  Moreover, according to this embodiment, the method of connecting the segments 11 and 12 using the connection tool 40 is the housing member which includes the distal end portion 21b of the engaging member 21 by the biasing force from the coil spring 23 (biasing member). 22 is projected into the internal space 20a (see FIG. 3A), and the engaging member 21 is coiled by a plate-like member 30 (convex member) inserted into the internal space 20a (coil spring 23) (biasing member). And pressing against the urging force (FIG. 3 (A), (B) and FIG. 4 (A)), and the distal end portion 21b of the pressed engagement member 21 is coil spring 23 ( The engagement member 21 is inserted into the engagement hole 31 by the urging force from the urging member) (FIG. 4B). Thereby, the female joint part 2 of the segment 11 and the male joint part 3 of the segment 12 can be connected and fixed automatically with a simple configuration.

  In the present embodiment, the inclined portion 30c is provided at the distal end portion 30b of the plate-like member 30, but the inclined portion 30c may be omitted. Moreover, although the inclined surface 21c is provided in the front-end | tip part 21b of the engaging member 21, this inclined surface 21c may be abbreviate | omitted.

FIG. 5A is a cross-sectional view illustrating a schematic configuration of a connector 40 ′ according to the second embodiment of the present invention. FIG. 5B is a cross-sectional view taken along the line II-II in FIG. FIG. 5C is a cross-sectional view taken along the line III-III in FIG.
Differences from the first embodiment will be described.

The connection tool 40 ′ in the present embodiment is for connecting and fixing the segments 11 and 12 having the connection surfaces 11a and 12a facing each other in the tunnel axis direction.
The connector 40 ′ includes a female joint portion 2 ′ provided in the segment 11 and a male joint portion 3 ′ provided in the segment 12.

The female joint portion 2 ′ of the segment 11 includes a tubular member 24, a plug 25, and an interposition member 26 in addition to the opening 20, the engagement member 21, the housing member 22, and the coil spring 23 described above. Consists of including.
A female screw portion (not shown) is recessed in the distal end portion 21b of the engaging member 21, and a pan head screw 21d whose head is curved in a pan shape is screwed into the female screw portion.

The tubular member 24 is made of, for example, metal, extends in the tunnel radial direction, and can communicate the internal space 20a of the opening 20 and the in-tunnel space 100. A housing member 22 is provided in the tubular member 24. Therefore, in the present embodiment, the housing member 22 and the tubular member 24 are located on the inner side in the tunnel radial direction (the inner surface side of the segment 11) than the internal space 20 a of the opening 20.
The plug 25 is inserted into the opening end 24a on the inner side in the tunnel radial direction of the tubular member 24, and closes the opening end 24a. The plug 25 is made of resin, for example.

In the opening 20, the plate-like member 61 constituting the outer portion in the tunnel radial direction, the plate-like member 62 constituting the inner portion in the tunnel radial direction, and the plate-like members 61, 62 are interposed between the side walls. The internal space 20a is partitioned by the plate-like member 63 that is configured. The plate-like member 62 is formed with a through hole 62a into which the end of the housing member 22 on the inner space 20a side can be inserted.
A concave portion 61a is formed on the surface (inner surface) of the plate-like member 61 on the inner space 20a side, and the distal end portion 21b of the engaging member 21 to which the aforementioned pan head machine screw 21d is attached is formed in the concave portion 61a. Can be inserted.

The interposition member 26 is interposed between the distal end portion 21b of the engaging member 21 and the inner surface (in the present embodiment, the concave portion 61a and the vicinity thereof) of the opening 20 facing the distal end portion 21b. The interposed member 26 has, for example, a rectangular parallelepiped shape (preferably a cubic shape), and is made of, for example, a resin. The shape of the interposed member 26 is not limited to this, and may be, for example, a cylindrical shape.
The interposition member 26 is movable in the internal space 20a by being pressed by the plate-like member 30 by insertion of the plate-like member 30 into the internal space 20a. In the present embodiment, the interposition member 26 is pressed by the plate-like member 30 by being inserted into the internal space 20a of the plate-like member 30, thereby causing it to move in the tunnel axis direction (specifically, from the face side to the wellhead side). ) It can move in the internal space 20a.

In the present embodiment, a pair of plate-like guide members 65 for guiding movement of the interposition member 26 in the tunnel space in the internal space 20a (specifically, movement from the face side to the wellhead side) is a plate-like member. 62. Each of the guide members 65 extends in the tunnel axis direction, and the interposition member 26 is disposed in a gap (groove portion) between the guide members 65.
For example, a conical recess 26 a is formed on the surface of the interposition member 26 on the side facing the distal end portion 21 b of the engagement member 21. A pan head screw 21d attached to the distal end portion 21b of the engagement member 21 can be positioned in the recess 26a. Thus, by positioning the pan head screw 21d in the recess 26a, before the plate member 30 is inserted into the internal space 20a (that is, between the female joint portion 2 ′ and the male joint portion 3 ′). It is possible to prevent the interposition member 26 from moving in the internal space 20a (prior to connecting and fixing).

The interposed member 26 is attached from the coil spring 23 while being interposed between the distal end portion 21b of the engaging member 21 and the inner surface of the opening 20 (in this embodiment, the recess 61a and its vicinity). The force is pressed to the side of the inner surface of the opening 20 (in this embodiment, the recess 61a and the vicinity thereof) through the engaging member 21. Thereby, before the plate-shaped member 30 is inserted into the internal space 20a (that is, prior to the coupling and fixing of the female joint portion 2 ′ and the male joint portion 3 ′), the interposition member 26 is disposed in the internal space 20a. Can be suppressed.
The plate-like member 30 constituting the male joint portion 3 ′ of the segment 12 has a chamfered portion 30d formed at the tip portion 30b.

Next, a method for connecting the segments 11 and 12 will be described with reference to FIG.
FIG. 6 shows a method of connecting the segments 11 and 12 using the connector 40 ′ in the present embodiment.
Prior to connecting the segment 12 to the segment 11, the female joint portion 2 ′ of the segment 11 is formed between the tip 21 b of the engaging member 21 and the inner surface of the opening 20 (in this embodiment, the recess 61 a and the vicinity thereof). The interposed member 26 is disposed between them (see FIG. 6A).

  When connecting the segments 11 and 12, as shown in FIGS. 6A and 6B, the connecting surface 12a of the segment 12 is brought close to the connecting surface 11a of the segment 11, and the opening of the female joint portion 2 ′ of the segment 12 is opened. While inserting the plate-like member 30 of the male joint portion 3 ′ of the segment 11 into the internal space 20 a of the portion 20, the interposition member 26 of the female joint portion 2 ′ of the segment 12 is moved by the plate-like member 30 in the tunnel axial direction. (In this embodiment, from the face side to the wellhead side (that is, from the front side to the back side in the moving direction α)). Thereby, the intervention member 26 moves in the internal space 20a in the tunnel axis direction (specifically, from the face side to the wellhead side). During this movement, the plate member 30 presses the engagement member 21 against the urging force from the coil spring 23 while the tip portion 30b of the plate member 30 and the tip portion 21b of the engagement member 21 are in contact with each other. The intervention member 26 can be smoothly separated from the distal end portion 21 b of the engagement member 21 while the engagement member 21 is still accommodated in the accommodation member 22.

When the insertion of the plate-like member 30 into the internal space 20a is further continued, as shown in FIG. 6C, the tip portion 21b of the engagement member 21 is pressed by the biasing force from the coil spring 23. The engagement member 21 is inserted into the engagement hole 31 of the plate 30, and the engagement member 21 is engaged with the engagement hole 31 of the plate-like member 30.
In this way, the segments 11 and 12 are connected and fixed via the connecting tool 40 '.

  In particular, according to the present embodiment, the connection tool 40 ′ is formed between the distal end portion 21 b of the engaging member 21 and the inner surface of the opening 20 facing the distal end portion 21 b (in the present embodiment, the recess 61 a and the vicinity thereof). An interposition member 26 is provided. The intervention member 26 is movable in the internal space 20a by being pressed by a plate-like member 30 (convex member) inserted into the internal space 20a. Thereby, when the segments 11 and 12 are connected and fixed, it is possible to suppress the tip portion 30b of the plate-like member 30 from colliding with the engaging member 21 substantially perpendicularly to the extending direction of the engaging member 21. The breakage of the engaging member 21 can be suppressed.

  Further, according to the present embodiment, the interposition member 26 is interposed between the distal end portion 21b of the engagement member 21 and the inner surface of the opening 20 (in the present embodiment, the recess 61a and the vicinity thereof). Thus, the biasing force from the coil spring 23 (biasing member) is pressed through the engagement member 21 toward the inner surface of the opening 20 (in this embodiment, the recess 61a and the vicinity thereof). Thereby, before the plate-shaped member 30 is inserted into the internal space 20a (that is, prior to the coupling and fixing of the female joint portion 2 ′ and the male joint portion 3 ′), the interposition member 26 is disposed in the internal space 20a. Can be suppressed.

  In addition, according to the present embodiment, the connector 40 ′ is provided in the segment 11 (the other segment), extends in the tunnel radial direction, and can communicate with the internal space 20 a and the tunnel internal space 100. The member 24 includes a plug 25 that closes the opening end 24 a on the inner side in the tunnel radial direction of the tubular member 24. A housing member 22 is provided in the tubular member 24. Thereby, for example, when the segments 11 and 12 are erroneously connected to each other and the male joint portion 3 ′ needs to be separated from the female joint portion 2 ′ of the connector 40 ′, the plug 25 is tunneled from the tubular member 24. Then, the housing member 22 and the coil spring 23 are removed from the inside of the tunnel through the tubular member 24 to remove the engaging member 21 from the engaging hole 31 of the plate-like member 30. be able to.

  In addition, according to the present embodiment, the method of connecting the segments 11 and 12 using the connector 40 ′ is performed by using the distal end portion 21 b of the engaging member 21 and the inner surface of the opening 20 (in this embodiment, the recess 61 a and the vicinity thereof). (See FIG. 6 (A)), and the interposition member 26 is pressed by the plate member 30 (convex member) inserted into the internal space 20a. The member 26 is separated from the distal end portion 21b of the engaging member 21, and the engaging member 21 is pressed against the urging force from the coil spring 23 (urging member) by the plate-like member 30 (convex member). (See FIGS. 6 (B) and 6 (C)), and the pressed end 21b of the engaging member 21 is urged by the urging force from the coil spring 23 (urging member) to form a plate-like member 30 (convex member). The engagement member 21 is inserted into the engagement hole 31 and the engagement member 21 is a plate-like member. 0 to engage the engaging hole 31 of the (convex member) (see FIG. 6 (C)), including. Thereby, the female joint portion 2 ′ of the segment 11 and the male joint portion 3 ′ of the segment 12 can be automatically connected and fixed with a simple configuration.

  In addition, it cannot be overemphasized that the female joint part 2 of the above-mentioned 1st Embodiment may be provided with the tubular member 24 and the plug 25 in this embodiment.

Fig. 7 (A) is a cross-sectional view showing a schematic configuration of a connector 40 "according to the third embodiment of the present invention. Fig. 7 (B) is a cross-sectional view taken along the line IV-IV of Fig. 7 (A). 7 (C) is a cross-sectional view taken along the line VV in FIG. 7 (B).
Differences from the second embodiment will be described.

The connecting tool 40 ″ in this embodiment is for connecting and fixing the segments 11 ″ and 12 ″ having the connecting surfaces 11a ″ and 12a ″ facing each other in the tunnel circumferential direction.
The connector 40 ″ includes a female joint portion 2 ″ provided in the segment 11 ″ and a male joint portion 3 ″ provided in the segment 12 ″.

  The plate-like member 30 constituting the male joint portion 3 ″ of the segment 12 ″ extends perpendicularly from the connecting surface 12a ″ of the segment 12 ″. The plate-like member 30 has a base end portion 30a fixed in the segment 12 ″, and a tip end portion 30b protruding from the connecting surface 12a ″ so as to extend along the circumferential direction of the tunnel. The plate-like member 30 is formed with an engagement hole 31 penetrating the plate-like member 30 in the thickness direction (tunnel radial direction). The engagement hole 31 is sized to allow the engagement member 21 to be inserted. In the present embodiment, the cross-sectional shape of the engagement hole 31 is an elliptical shape having the major axis in the tunnel axis direction. However, the cross-sectional shape of the engagement hole 31 is not limited to this, for example, a circular shape or a rectangular shape. It may be.

The female joint portion 2 ″ of the segment 11 ″ includes the opening 20, the engaging member 21, the housing member 22, the coil spring 23, the tubular member 24, the plug 25, and the interposition member 26 described above. .
The opening 20 is recessed in the connecting surface 11a ″ of the segment 11 ″ and has an internal space 20a composed of two internal spaces 20a-1 and 20a-2.

The part on the face side of the internal space 20a is a rectangular parallelepiped first internal space 20a-1. The first inner space 20a-1 is a portion into which the distal end portion 30b of the plate-like member 30 is first inserted when the segments 11 ″ and 12 ″ are connected and fixed.
The portion on the wellhead side of the internal space 20a is a rectangular parallelepiped second internal space 20a-2. The second internal space 20a-2 includes a plate-like member 61 ″ located on the outer side in the tunnel radial direction, a plate-like member 62 ″ located on the inner side in the tunnel radial direction, and the plate-like members 61 ″ and 62 ″. It is partitioned and formed by a plate-like member 63 ″ that is mounted and constitutes a side wall. The plate-like member 62 ″ has a through-hole 62a into which an end of the accommodating member 22 on the second internal space 20a-2 side can be inserted. "Is formed.
A concave portion 61a ″ is formed in the surface (inner surface) of the plate-like member 61 ″ on the second internal space 20a-2 side, and the above-described pan head screw 21d is attached to the concave portion 61a ″. The distal end portion 21b of the combined member 21 can be inserted.

  The interposition member 26 is pressed by the plate-like member 30 when the plate-like member 30 is inserted into the second inner space 20a-2 from the first inner space 20a-1, so that the inner member 20a (Especially in the second internal space 20a-2) is movable. In the present embodiment, the intervention member 26 is pressed by the plate-like member 30 when the plate-like member 30 is inserted from the first internal space 20a-1 into the second internal space 20a-2. Thus, it is possible to move in the internal space 20a (particularly, in the second internal space 20a-2) in the tunnel axis direction (specifically, from the face side to the wellhead side).

In the present embodiment, in order to guide movement of the interposition member 26 in the tunnel axis direction (specifically, movement from the face side to the wellhead side) in the internal space 20a (particularly, in the second internal space 20a-2). The plate-shaped guide member 65 ″ is provided on the plate-shaped member 62 ″. The guide member 65 ″ is formed with a groove 65a ″ extending in the tunnel axis direction, and the interposition member 26 is disposed in the groove 65a ″.
In the present embodiment, a recess 63a ″ is formed in the plate-like member 63 ″, and the interposed member 26 can be accommodated in the recess 63a ″.

Next, a method of connecting the segments 11 ″ and 12 ″ will be described with reference to FIGS. 8 to 10 in addition to FIG.
FIGS. 8 to 10 show a method of connecting the segments 11 ″ and 12 ″ using the connector 40 ″ in the present embodiment.
Prior to connecting the segment 12 ″ to the segment 11 ″, in the female joint portion 2 ″ of the segment 11 ″, the distal end portion 21b of the engaging member 21 and the inner surface of the opening 20 (in this embodiment, the recess 61a ″ and its The interposition member 26 is disposed between the vicinity (see FIGS. 7A and 7C).

  When connecting the segments 11 ″ and 12 ″, first, as shown in FIGS. 8A and 8B, the connecting surface 12a ″ of the segment 12 ″ is brought close to the connecting surface 11a ″ of the segment 11 ″, and the segment 12 ″ is connected. The plate-like member 30 of the male joint part 3 ″ of the segment 11 ″ is inserted into the first internal space 20a-1 of the opening 20 of the female joint part 2 ″.

  Next, as shown in FIGS. 8B and 9A, the plate-like member 30 of the male joint portion 3 ″ is moved from the first internal space 20a-1 to the second internal space 20a-2. The interposition member 26 of the female joint portion 2 ″ of the segment 12 ″ is moved in the tunnel axial direction (in this embodiment from the face side to the wellhead side (in other words, FIG. 12 described later). In this way, the interposition member 26 is pushed in the tunnel axial direction (specifically from the face side to the wellhead side) in the internal space 20a (in particular, the second direction). In this movement, the plate member 30 pushes the engagement member 21 from the coil spring 23 while the plate member 30 and the tip 21b of the engagement member 21 are in contact with each other. The engaging member 21 is accommodated in the accommodating member 22. In the state of the left, it can be separated smoothly intermediate member 26 from the tip portion 21b of the engaging member 21.

When the movement of the plate-like member 30 in the second internal space 20a-2 is further continued, as shown in FIG. 9B, the distal end portion 21b of the engaging member 21 is biased by the coil spring 23. Thus, the engagement member 21 is inserted into the engagement hole 31 of the plate-like member 30 and the engagement member 21 is engaged with the engagement hole 31 of the plate-like member 30 (see FIG. 10).
In this way, the segments 11 ", 12" are connected and fixed via the connecting tool 40 ".

  In particular, according to the present embodiment, the connecting tool 40 ″ includes the tip 21b of the engaging member 21 and the inner surface of the opening 20 opposite to the tip 21b (in this embodiment, the recess 61a ″ and the vicinity thereof). An interposition member 26 interposed therebetween is provided. The intervention member 26 is movable in the second internal space 20a-2 by being pressed by the plate-like member 30 (convex member) inserted into the second internal space 20a-2. Thereby, it is possible to prevent the plate-like member 30 from colliding with the engaging member 21 substantially perpendicularly to the extending direction of the engaging member 21 when the segments 11 ″ and 12 ″ are connected and fixed. The breakage of the joint member 21 can be suppressed.

  Further, according to the present embodiment, the interposition member 26 is interposed between the distal end portion 21b of the engagement member 21 and the inner surface of the opening 20 (in the present embodiment, the recess 61a ″ and its vicinity). In this state, the biasing force from the coil spring 23 (biasing member) is pressed to the inner surface (in this embodiment, the recess 61a ″ and the vicinity thereof) of the opening 20 via the engaging member 21. Thereby, before the plate-shaped member 30 is inserted into the second inner space 20a-2 (that is, prior to connecting and fixing the female joint portion 2 ″ and the male joint portion 3 ″), the interposition member It can suppress that 26 moves the 2nd internal space 20a-2.

  Further, according to the present embodiment, the method of connecting the segments 11 ″, 12 ″ with the connecting tool 40 ″ is performed by using the distal end portion 21b of the engaging member 21 and the inner surface of the opening 20 (in this embodiment, the recess 61a ″). And the vicinity thereof) (see FIG. 7), the plate-like member 30 (convex member) inserted into the second internal space 20a-2 causes the intervention member 26 to be disposed. The interposing member 26 is separated from the distal end portion 21b of the engaging member 21 by pressing, and the engaging member 21 is resisted against the urging force from the coil spring 23 (urging member) by the plate-like member 30 (convex member). (See FIG. 8B, FIG. 9A and FIG. 9B), and the pressed end 21b of the engaging member 21 is applied from the coil spring 23 (biasing member). Inserted into the engagement hole 31 of the plate-like member 30 (convex member) by force, The engagement member 21 is engaged with the engaging hole 31 of the plate member 30 (convex member) (FIG. 9 (B), and FIG. 10), including. Thus, the female joint portion 2 ″ of the segment 11 ″ and the male joint portion 3 ″ of the segment 12 ″ can be automatically connected and fixed with a simple configuration.

Fig. 11 (A) is a cross-sectional view showing a schematic configuration of a connector 40 "according to the fourth embodiment of the present invention. Fig. 11 (B) is a cross-sectional view taken along the line VI-VI in Fig. 11 (A). 12A is a cross-sectional view taken along the line VII-VII in FIG. 11B, and FIG. 12B is a cross-sectional view taken along the line VIII-VIII in FIG.
Differences from the third embodiment will be described.

In the present embodiment, the interposition member 26 does not exist, and the configuration of the engaging member 21 is the same as that of the first embodiment described above.
That is, in this embodiment, the inclined surface 21c is formed in the front-end | tip part 21b of the engaging member 21. As shown in FIG. The inclined surface 21c is inclined so as to be away from the coil spring 23 as it goes from the face side to the wellhead side. In other words, the inclined surface 21c is inclined toward the outer side in the tunnel radial direction (the outer surface side of the segment 11 ″) as it goes from the face side to the wellhead side.

  The plate-shaped member 30 is a portion on the inner side in the tunnel radial direction in the exposed portion including the tip portion 30b, and an inclined portion 30c 'is formed in a portion on the wellhead side. The inclined portion 30c 'is inclined corresponding to the aforementioned inclined surface 21c. The inclined portion 30 c ′ is inclined so as to be directed toward the tunnel radial direction outer side (the outer surface side of the segment 12 ″) toward the wellhead side.

Here, the moving direction β in the second internal space 20a-2 of the plate-like member 30 of the segment 12 ″ indicated by the one-dot chain line arrow in FIGS. This corresponds to “the moving direction of the convex member within the internal space”. Further, in FIGS. 12A and 12B, the direction from the left side to the right side of the page (that is, from the face side to the wellhead side) is “in the direction of movement of the convex member in the internal space”. Corresponding to “from the near side to the far side”.
Therefore, the inclined surface 21c formed at the distal end portion 21b of the engaging member 21 is deeper from the near side in the movement direction β in the second internal space 20a-2 of the plate-like member 30 inserted into the opening 20. It is inclined so as to move away from the coil spring 23 as it goes to the side (that is, from the face side toward the wellhead side) (see FIG. 12B).

  In the present embodiment, of the plate-like member 30, an inclined portion is formed on at least a part of the region that can contact the distal end portion 21 b of the engagement member 21 when the plate-like member 30 is inserted into the opening 20. 30c 'is formed. The inclined portion 30c ′ tapers from the near side to the far side in the movement direction β in the second internal space 20a-2 of the plate-like member 30 (that is, from the face side to the wellhead side). (See FIG. 12A).

Next, a method of connecting the segments 11 ″ and 12 ″ will be described with reference to FIGS. 13 and 14 in addition to FIGS. 11 and 12 described above.
13 and 14 show a method for connecting the segments 11 ", 12" using the connector 40 ".
Prior to connecting the segment 12 ″ to the segment 11 ″, in the female joint portion 2 ″ of the segment 11 ″, the distal end portion 21b of the engagement member 21 is moved from the housing member 22 by the urging force from the coil spring 23. Projecting into the internal space 20a-2 (see FIGS. 11A and 12B). In the present embodiment, the distal end portion 21b of the engaging member 21 can be positioned in the vicinity of the plate-like member 61 ″ of the opening 20.

  When connecting the segments 11 ″ and 12 ″, first, as shown in FIGS. 13A and 13B, the connecting surface 12a ″ of the segment 12 ″ is brought close to the connecting surface 11a ″ of the segment 11 ″, and the segment 12 ″ is connected. The plate-like member 30 of the male joint part 3 ″ of the segment 11 ″ is inserted into the first internal space 20a-1 of the opening 20 of the female joint part 2 ″.

  Next, as shown in FIGS. 13B and 14A, the plate-like member 30 of the male joint portion 3 ″ is moved from the first internal space 20a-1 to the second internal space 20a-2. The engagement member 21 of the female joint portion 2 ″ of the segment 12 ″ is pressed against the urging force from the coil spring 23 by the plate-like member 30 while the plate-like member 30 is moved. It accommodates in the accommodating member 22 so as to dodge the shaped member 30. At this time, the inclined member 30c 'of the plate-like member 30 and the inclined surface 21c of the engaging member 21 are in contact with each other, and the plate-like member 30 is engaged. Since the member 21 is pressed, the engaging member 21 can be smoothly accommodated in the accommodating member 22.

When the movement of the plate-like member 30 in the second internal space 20a-2 is further continued, as shown in FIGS. 14A and 14B, the distal end portion 21b of the engaging member 21 is turned into the coil spring 23. Due to the urging force from the plate member 30, the engagement member 21 is engaged with the engagement hole 31 of the plate member 30.
In this way, the segments 11 ", 12" are connected and fixed via the connecting tool 40 ".

  In particular, according to the present embodiment, the inclined surface 21 c is formed at the distal end portion 21 b of the engaging member 21, and the inclined surface 21 c of the plate-like member 30 (convex member) inserted into the opening 20. As it moves from the near side to the far side in the movement direction β in the second internal space 20a-2, the second inner space 20a-2 is inclined so as to be separated from the coil spring 23 (biasing member). Thereby, the plate-like member 30 presses the engagement member 21 while the inclined portion 30c ′ of the plate-like member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other. Can be housed inside.

  Moreover, according to this embodiment, when the plate-shaped member 30 (convex-shaped member) of the plate-shaped member 30 (convex-shaped member) is inserted into the opening 20, it contacts the distal end portion 21 b of the engaging member 21. An inclined portion 30c ′ is formed in at least a part of the possible region, and this inclined portion 30c ′ is the moving direction of the plate-like member 30 (convex member) in the second internal space 20a-2. It is inclined so as to taper from the near side toward the far side in β. Thereby, the plate-like member 30 presses the engagement member 21 while the inclined portion 30c ′ of the plate-like member 30 and the inclined surface 21c of the engagement member 21 are in contact with each other. Can be housed inside.

  In addition, according to the present embodiment, the method of connecting the segments 11 ″ and 12 ″ using the connecting tool 40 ″ is based on the urging force from the coil spring 23 (the urging member). Projecting from the housing member 22 into the second internal space 20a-2 (see FIG. 11A and FIG. 12B), the plate-like member 30 inserted into the second internal space 20a-2. By pressing the engaging member 21 against the urging force from the coil spring 23 (biasing member) by the (convex member), and the tip end portion 21b of the pressed engaging member 21 becomes the coil spring 23 ( It is inserted into the engagement hole 31 by the urging force from the urging member), and the engagement member 21 is engaged with the engagement hole 31 (FIGS. 14A and 14B). The female joint part 2 of the segment 11 ″ automatically with a simple configuration A segment 12 "male joint portion 3 of" can be connected and fixed to the.

  The illustrated embodiments are merely examples of the present invention, and the present invention is not limited to those directly described by the described embodiments, and various improvements and modifications made by those skilled in the art within the scope of the claims. Needless to say, it encompasses changes.

1 segment 2, 2 ', 2 "female joint part 3, 3', 3" male joint part 11, 12, 11 ", 12" segment 11a, 12a, 11a ", 12a" connecting surface 20 opening 20a inside Space 20a-1 First internal space 20a-2 Second internal space 20b Inner wall 21 Engaging member 21a Base end 21b Tip 21c Inclined surface 21d Pan head screw 22 Housing member 22a Bottom 23 Coil spring 24 Tubular member 24a Opening End 25 Plug 26 Interposition member 26a Recess 30 Plate-like member (convex member)
30a Base end 30b Tip 30c, 30c 'Inclined portion 30d Chamfer 31 Engagement hole 40, 40', 40 "Connector 61-63, 61" -63 "Plate member 65, 65" Guide member 61a, 61a "Recessed part 62a, 62a" Through hole 63a "Recessed part 65a" Groove part 100 Space in tunnel

Claims (11)

A connecting tool for connecting and fixing segments for tunnel lining having connecting surfaces facing each other,
A convex member that protrudes perpendicularly from the connecting surface of one segment and has an engagement hole formed therethrough;
An opening recessed in the connecting surface of the other segment and into which the convex member can be inserted;
An engagement member provided on the other segment, and engageable with the engagement hole in a state where the convex member is inserted into the opening;
A connector comprising: The convex member is a plate member,
The opening has a rectangular parallelepiped internal space,
The engagement member is rod-shaped,
The connector is
A bottomed cylindrical housing member provided on the other segment, facing the internal space, and capable of housing at least the base end of the engaging member;
A biasing member that is interposed between a bottom portion of the housing member and a base end portion of the engagement member and biases the engagement member from the housing member toward the internal space;
The connector according to claim 1, further comprising: An inclined surface is formed at the tip of the engaging member,
The inclined surface is inclined so as to move away from the urging member as it goes from the near side to the far side in the movement direction of the convex member inserted into the opening in the internal space. 2. The connector according to 2. Among the convex members, an inclined portion is formed in at least a part of the region that can contact the tip of the engaging member when the convex member is inserted into the opening.
The said inclination part is a connection tool of Claim 2 or Claim 3 which inclines so that it may taper from the near side in the movement direction in the said internal space in the said interior space toward the back | inner side. The connector further includes an interposition member interposed between a distal end portion of the engagement member and an inner surface of the opening portion opposed to the distal end portion,
The coupling tool according to claim 2, wherein the intervention member is movable in the internal space by being pressed by the convex member inserted into the internal space.   The interposed member is interposed between the distal end portion of the engaging member and the inner surface, and is biased toward the inner surface via the engaging member by a biasing force from the biasing member. The connector according to claim 5, which is pressed. The connector further includes an interposition member interposed between a distal end portion of the engagement member and an inner surface of the opening portion opposed to the distal end portion,
The interposed member is interposed between the distal end portion of the engaging member and the inner surface, and is biased toward the inner surface via the engaging member by a biasing force from the biasing member. The connector according to claim 2, which is pressed.   The connector according to any one of claims 2 to 7, wherein the housing member and the biasing member are positioned on the inner side in the tunnel radial direction than the opening in the other segment. The connector is
A tubular member provided in the other segment, extending in the radial direction of the tunnel, and capable of communicating the internal space and the tunnel internal space;
A plug for closing the opening end of the tubular member in the radial direction of the tunnel;
Further comprising
The connector according to claim 8, wherein the housing member is provided in the tubular member. A method of connecting segments using the connector according to any one of claims 2 to 4,
Projecting the distal end portion of the engaging member from the housing member into the internal space by a biasing force from the biasing member;
Pressing the engaging member against the biasing force by the convex member inserted into the internal space; and
A distal end portion of the pressed engaging member is inserted into the engaging hole by the biasing force, and the engaging member engages with the engaging hole;
Consolidation method for segments. A method for connecting segments using the connector according to any one of claims 5 to 7,
Disposing the interposition member between the front end of the engagement member and the inner surface;
The intervention member is pressed by the convex member inserted into the internal space to separate the intervention member from the distal end portion of the engagement member, and the engagement member is attached to the engagement member by the convex member. Pressing against the biasing force from the biasing member; and
A distal end portion of the pressed engaging member is inserted into the engaging hole by the biasing force, and the engaging member engages with the engaging hole;
Consolidation method for segments.