JP2001158012A - Mounting structure of connecting implement to form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily accurately mount a connecting cylinder for constituting a connecting structure for connecting the cylinder provided in a structure of a segment or the like by engaging the cylinder by a connecting bar at a form for molding the structure. SOLUTION: A mounting bolt 49 projectably from and retractably in the inner surface side of side plate 43 of a form 41 for molding the connecting end face of a segment by a holding mechanism 45 by an inserting hole 44 formed at the plate 43 is provided. The outer diameter of the bolt 49 is slightly smaller than the inner diameter of the engaging hole 31 of the connecting cylinder 12. A threaded part 51 capable of being engaged with a supporting hole 38 made of female threads formed at the bottom 37 of the hole 31 of the cylinder 12 is formed at the end of the bolt 49. The hole 31 of the cylinder 12 is engaged with the end side of the bolt 49, the part 51 of the bolt 49 is engaged with the hole 38, and hence the cylinder 12 is drawn up to the inner surface of the plate 43 and mounted in a contacted state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a structure for attaching a joining tool to a formwork used when joining a plurality of structures such as segments which are joined to form a tubular tunnel lining body. It is about.

[0002]

2. Description of the Related Art For example, when constructing a cylindrical tunnel wall, segments are generally joined together by bolts. As a structure for joining the segments with the bolts, a joint plate having holes communicating with each other when the joining surfaces of the segments are brought into contact with each other is embedded near the joint end surface of the segment, and these joint plates are With the joint end faces of the segments abutting, the bolts are inserted into the holes so that the holes of the segments communicate with each other, and the nuts are fastened and joined to the bolts inserted into the holes in this way. General.

[0003] In this connection structure, a very complicated operation of inserting a bolt into a hole formed in a joint surface of a joint plate at a construction site and fastening a nut to the bolt is required.

[0004] For this reason, the present inventors have developed a joining structure capable of joining segments very easily. This joint structure will be described with reference to the drawings. As shown in FIG. 10, each segment 1 has its joint end face 1
The joining cylinders 2 are provided at the both ends of a cylindrical joining rod 3 in which a plurality of slits 3a extending in the axial direction are formed at both ends at intervals in the circumferential direction. Is to be inserted.

[0005] With the joining rod 3 inserted into the joining cylinder 2 of one segment 1, the other segment 1 is inserted.
When the joining rods 3 are inserted into the joining cylinder 2 by bringing them closer to each other and the joining end faces 1a of the respective segments 1 are brought closer to each other, as shown in FIG. 4 enters, whereby both end portions of the joining rod 3 are pushed outward and the outer peripheral surfaces thereof are pressed against the inner surface of the joining cylinder 2 to engage with each other, and the respective segments 1 are joined. It has become so.

As described above, according to the above-described joining structure, while the joining rod 3 is set in the joining cylinder 2 of one segment 1, the joining rod 3 is inserted into the joining cylinder 2 of the other segment 1. Bring the segments 1 close together and join the end face 1
These segments 1 can be very easily joined to each other by abutting a.

[0007]

By the way, when molding the segment 1 using the above-mentioned joining structure, the joining cylinder 2 is positioned with high precision on the mold plate for molding the joining end face 1a of the segment 1 of the mold. It is necessary to attach the connecting rod to the hole formed in the form plate from the outside, and in this case, the joining cylinder was fitted and held in this rod. The axis of the joint cylinder is tilted due to rattling of the fixing rod and the joint cylinder, and the segment 1
There was a risk that inconvenience would occur when joining the two.

The present invention has been made in view of the above circumstances, and a joining tool for joining structures such as segments can be attached to a structure very easily and with high precision, and can be attached to the structure. It is an object of the present invention to provide a structure for mounting a connector to a formwork capable of performing bonding.

[0009]

In order to achieve the above object, a structure for attaching a connector to a mold according to the first aspect of the present invention is a method for attaching a joining cylinder to a joining end surface of a joining body of structures joined to each other. By inserting both ends of the connecting rod, in which the bridge member is fitted and attached to the holes formed at both ends, into the engagement holes, and bringing the connecting end surfaces of the respective structures close to each other, The joining rod is pushed out by a bridge member and pressed against the inner peripheral surface of the engagement hole of the joining cylinder,
Attachment structure for attaching a joining tool composed of the joining cylinder, which constitutes a joining structure in which both ends of the joining rod are engaged with the joining cylinder and the structures are joined to each other, to a mold for molding the structure. A side plate for molding the joint end surface of the structure of the mold is provided with a holding mechanism for holding the joining cylinder in contact with the inner surface thereof, and the holding mechanism is formed on the side plate. A mounting bolt provided so as to be able to protrude and retract into the inserted through hole, the mounting bolt having an outer diameter slightly smaller than the engagement hole of the joining cylinder, and a tip end thereof. A threaded portion formed at the bottom of the engagement hole of the joining cylinder and capable of being screwed into a supporting hole formed of a screw, and screwing the threaded portion into the supporting hole of the joining cylinder to form the joint. The cylinder has its engaging hole fitted near the tip of the mounting bolt. Is characterized in that it is attached are attracted to the inner surface of the side plate at state to contact state.

In this manner, the engaging hole of the joining cylinder is fitted to the tip end of the mounting bolt provided on the side plate of the mold for molding the joining end face of the structure, and the tip of the attaching bolt is further fitted. By screwing the screw portion into the support hole of the joining cylinder, the joining cylinder can be attached very easily to the inner surface of the side plate while being brought into contact with it. Further, since the fitting hole of the joining cylinder is attached to the bolt formed to have an outer diameter slightly smaller than the inner diameter of the engaging hole of the joining cylinder, the joining cylinder is attached to the axis of the mounting bolt. Positioning can be performed in a state where they are aligned with each other, so that the joining cylinder can be attached to the side plate of the mold with extremely high precision. Thereby, the joining cylinder can be attached to the joining end face of the structure with extremely high accuracy, and a structure capable of performing good joining can be manufactured.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a structure for attaching a connector to a mold according to the present invention. First,
A joining structure provided in the segment and joining the segments to each other will be described. In FIG. 1, reference numeral 11 denotes a connecting rod, and reference numeral 12 denotes a connecting cylinder (connecting tool).
It is. The joining cylinders 12 are embedded in the segments (structures) 13 so as to be exposed at the joining end faces 13a. By fitting the joining rods 11 to the joining cylinders 12 of these segments 13, the respective segments 13 are connected to each other. The joining cylinder 12 and the joining rod 11 are joined by an engaging force.

The connecting rod 11 is formed of a mild steel or the like in a cylindrical shape. As shown in FIGS. 2 and 3, a plurality of slits 14 are provided at both ends in an axial direction along the circumferential direction. It is formed open. The connecting rod 11 is a solid part 15 whose middle part is solid.

At both ends of the joining rod 11, a piece member 16 formed in a truncated cone shape is mounted. In these piece members 16, the peripheral surface on the rear end side of the straight portion 17 formed near the front end portion is formed as a tapered portion 18 having a gradually increasing diameter, and the straight portion 17 at the front end portion is the same in the axial direction. It has a diameter and is formed only a predetermined length in the rear end direction.

Then, the straight portions 17 at the respective ends of the piece members 16 are fitted into the holes 11a from both ends of the joining rod 11 so that these piece members 16 are axially inserted into both ends of the joining rod 11. Are kept in a matched state. Note that a tapered portion 19 formed in a tapered shape is also formed at the tip end of the piece member 16.

One of the pieces 16 of these pieces 16
In A, a fitting projection 21 protruding rearward is formed on a rear end face 16a. A groove 22 is formed in the fitting projection 21 in the vicinity of the rear end thereof so as to extend in the circumferential direction. An O-ring 23 is mounted in the groove 22.

The joining rod 11 has saw blades 24 formed on the peripheral surfaces at both ends. As shown in FIG. 4, the saw blade 24 includes a plurality of peaks 25 and valleys 26 formed in a circumferential direction. Each of the peaks 25 extends from the tip toward the middle. The shape is inclined. The edge of the hole 11a of the joining rod 11 is chamfered to form a tapered portion 11b.

The joining cylinder 12 is provided with the bridge member 1 of the joining rod 11.
6 is provided with an engagement hole 31 into which both ends are inserted, and the distal end surface is exposed at the joint end surface 13 a of the segment 13. The inner peripheral surface of the engaging hole 31 formed in the joining cylinder 12 has an entrance side serving as a holding surface 32 formed to have the same diameter in the axial direction, and a deeper side than the holding surface 32, The engagement surface 33 is a tapered surface that gradually increases in diameter toward the back. The holding surface 32 constituting the engagement hole 31 has an inner diameter slightly larger than the outer diameter of the joining rod 11.

A screw hole 35 is formed at the rear end side of the joining cylinder 12, and an anchor bar 36 is fixed to the screw hole 35 by screwing a screw portion formed at the end. ing. It should be noted that a threaded bar is used as the anchoring bar 36, and the anchoring bar 3 made of the threaded bar is used.
6 may be screwed into the screw hole 35 of the joining cylinder 12 and fixed.

The center of the joining cylinder 12 is
As shown in FIG. 5, a support hole 38 having an internal thread 38a is formed in the bottom 37 of the engagement hole 31.
In addition, this support hole 38 penetrates to the screw hole 35 on the rear end side, but does not have to penetrate. The fitting projections 21 of the piece member 16A, in which the fitting projections 21 are formed, of the piece members 16 mounted on both ends of the joining rod 11 are fitted into the support holes 38 formed in the joining cylinder 12. It is supposed to be.

Then, the fitting projection 21 of the piece member 16A is formed.
Is fitted into the support hole 38, the O-ring 23 provided on the fitting projection 21 bites into and engages with the screw 38a formed on the inner surface of the support hole 38.
A is held on the bottom 37 of the engagement hole 31 of the joining cylinder 12 in a state where the rear end face 16a is in contact with the bottom 37 of the engagement hole 31, and the joining rod 11 is held by the joining cylinder 12. ing. The edge of the engagement hole 31 of the joining cylinder 12 on the entrance side is a tapered portion 31a formed in a tapered shape.

Next, a description will be given of a case where the segments 13 to which the above-described joining structure is applied are joined. First,
The straight portion 17 on the distal end side of the piece member 16 is fitted into the holes 11a at both ends of the joining rod 11 and fitted. At this time, since the tapered portion 11b is formed at the entrance side edge of the hole 11a and the tapered portion 19 is formed at the tip of the piece member 16, the piece of the joining rod 11 to the hole 11a is formed. The fitting of the straight portion 17 of the member 16 can be performed extremely smoothly.

Here, the straight portion 17 at the distal end of the piece member 16 is fitted into the hole 11a of the joining rod 11, so that the axis of the piece member 16 is aligned with both ends of the joining rod 11. Is held.

As described above, the connecting rod 11 having the bridge members 16 attached to both ends thereof is joined to the joining cylinder 12 of one of the segments 13 to be joined to each other.
Into the engaging hole 31 of At this time, the fitting protrusion 2
The end on the mounting side of the piece member 16 </ b> A formed with 1 is inserted. The piece member 16A attached to the joining rod 11
Is fitted into the support hole 38 of the joining cylinder 12.

In this way, the bridge member 16A is held at the center position of the joining cylinder 12, so that the joining rod 11 is connected to the joining cylinder 1 of one segment 13 as shown in FIG.
2 is held. Also, at this time, since the outer peripheral surface of the joining rod 11 is held by the holding surface 32 of the engaging hole 31 of the joining cylinder 12, the joining rod 11 is held and supported in a state of being coincident with the axis of the joining cylinder 12.

As described above, when the joining rod 11 is supported by the joining cylinder 12 of one segment 13, the other segment 13 is brought close to each other while the axes of the joining cylinders 12 are aligned with each other, and the joining of the other segment 13 is performed. The joining rod 11 held by the joining cylinder 12 of one segment 13 is inserted into the cylinder 12. At this time, since the joining rod 11 supported by the joining cylinder 12 of one segment 13 is supported in a state of being coincident with the axis of the joining cylinder 12, this supported joining rod 11 is attached to the other segment. 13 is securely inserted into the joining cylinder 12.

When the other segment 13 is brought closer to the one segment 13, the rear end face 16 a of the piece member 16 abuts against the bottom 37 of the engagement hole 31 of the joining cylinder 12 of the other segment 13. The member 16 is the connecting rod 11
Of the joining rod 11, the ends of the joining rod 11 at which the slits 14 are formed are pushed outward in the outer peripheral direction.

As a result, the outer peripheral surface of the joining rod 11 having the saw blade 24 is pressed against the engaging surface 33 of the joining cylinder 12, and the saw blade 24 on the outer peripheral surface of the joining rod 11 is brought into contact with the engaging surface 33. Into the connecting rod 11 as shown in FIG.
Is securely engaged with the joining cylinder 12. At this time, since the saw blade portion 24 has its peak 25 inclined from the distal end side of the joining rod 11 toward the intermediate side, when the joining rod 11 is inserted into the engaging hole 31 of the joining cylinder 12, The insertion resistance can be reduced, and after the insertion, the resistance of the joining rod 11 to be pulled out from the joining cylinder 12 can be increased.

When the joining rod 11 is engaged with the joining cylinder 12 of each segment 13 as described above, the segments 13 are securely joined to each other by this engaging force. Further, when the segments 13 are joined to each other in this manner, the solid portions 15 of the joining rods 11 are arranged at contact portions of the joining end surfaces 13a of the segments 13 with each other. Thus, the solid portion 15 of the connecting rod 11 reliably secures the shear resistance at the connecting portion of each segment 13.

Next, the segment 1 having the above joint structure
A description will be given of a mounting structure in which the joining cylinder 12 is mounted on the molding frame when the molding 3 is molded. In FIG. 8, reference numeral 41 is a mold for molding the concrete segment 13. The formwork 41 includes a bottom plate 42 and the bottom plate 4.
2 and a side plate 43 and an end plate (not shown). A portion surrounded by the bottom plate 42, the side plate 43, and the end plate is a concrete placing space S in which concrete is placed. I have.

That is, concrete is poured into the concrete placing space S, and after the concrete is hardened, the hardened concrete is removed from the mold 41 so that the concrete segment 13 is manufactured. Has become. An insertion hole 44 is formed in the side plate 43 constituting the mold 41, and a holding mechanism 45 for holding the joining cylinder 12 is provided at a position facing the insertion hole 44 on the outer surface side of the side plate 43. .

The holding mechanism 45 is inserted through a support frame 46 fixed to the side plate 43, a holding plate 47 fixed to an end of the support frame 46, and a hole 48 formed in the holding plate 47. Further, a mounting bolt 49 whose tip side is made to be able to protrude and retract from the inner surface side of the side plate 43 through the insertion hole 44 is formed. The outer diameter of the mounting bolt 49 is
The diameter of the holding surface 33 formed in the second engaging hole 31 is slightly smaller than the inner diameter of the holding surface 33. The joining cylinder 12 is held in a state where the axis is aligned with the mounting bolt 49.

The mounting bolt 49 has a large-diameter head 50 at its rear end.
By locking the head portion 50 to the holding plate 47,
The movement of the mounting bolt 49 toward the distal end is restricted at a predetermined position. Also, this mounting bolt 49
Is formed with a screw portion 51 at the tip end thereof.
It is designed to be screwed into.

That is, the mounting bolt 49 is connected to the side plate 4
In a state where the mounting cylinder 49 is projected from the insertion hole 44 of the third to the concrete placing space S side, the joining cylinder 12 is fitted into the tip side of the mounting bolt 49, and the mounting bolt 49 is rotated in this state. The screw portion 51 at the tip of the mounting bolt 49 is screwed into the support hole 38 of the joining cylinder 12.

The mounting bolt 49 is provided with a flange 52 at an intermediate portion thereof. The flange portion 52 is formed to have a larger diameter than the hole portion 48 formed in the holding plate 47, so that when the mounting bolt 49 is moved to the rear end side, the flange portion 52 is held. The mounting bolt 49 is locked to the plate 47 so that the mounting bolt 49 does not fall off the support frame 46. When the mounting bolt 49 is moved to the rear end side, the screw portion 51 at the front end thereof is
Is completely drawn into the insertion hole 44 of the side plate 43 without protruding toward the inner surface side.

Next, the form end 41 having the side plate 43 provided with the holding mechanism 45 having the above-described structure is used to form the joining end face 13a.
The case where the segment 13 provided with the joining cylinder 12 is formed will be described. First, the joining cylinder 12 is set on the mold 41. That is, the mounting bolt 4 of the holding mechanism 45
9 is moved to the front end side so as to protrude from the insertion hole 44, and the joining tube is connected to the front end side of the mounting bolt 49 by screwing the anchor bar 36 into the screw hole 35 on the rear end side. Twelve engagement holes 31 are fitted.

After that, the mounting bolt 49 is rotated,
A screw portion 51 formed at the tip of the mounting bolt 49
Is screwed into a support hole 38 formed in the joining cylinder 12 and serving as a screw. In this way, the joining cylinder 12 is attached to the distal end of the mounting bolt 49, and the mounting bolt 49 is further screwed in so that the mounting bolt 49 locks the head 50 to the holding plate 47. The movement to the tip side is regulated by this,
The joining cylinder 12 is pulled toward the side plate 43 by the mounting bolt 49.

As described above, when the joining cylinder 12 is pulled toward the side plate 43 by the mounting bolt 49, the distal end of the joining cylinder 12 comes into contact with the side plate 43. That is, the joining cylinder 12 is attached to the side plate 43 by the attachment bolt 49 in a state where the tip end thereof is in contact with the side plate 43. Note that, after attaching the joining tube 12 to the side plate 43, the anchor streaks 36 may be screwed into the screw holes 35 of the joining tube 12 to be connected.

Also, at this time, since the mounting bolt 49 of the joining cylinder 12 having a diameter slightly smaller than the inner diameter of the holding surface 32 is fitted into the engagement hole 31, the joint cylinder 12 is aligned with the axis of the mounting bolt 49. The side plate 4 is positioned in the same axis position.
3 attached. Thus, the side plate 4 of the form 41
When the joining cylinder 12 is attached to the inner surface side of the concrete 3, concrete is poured into the concrete placing space S of the formwork 41.

Thereafter, when the concrete has hardened,
By rotating the mounting bolt 49 in the opposite direction to that at the time of mounting, the screw portion 51 at the distal end thereof is loosened from the support hole 38 of the joining cylinder 12 and is further drawn toward the rear end side. In this way, as shown in FIG. 9, when the mounting bolt 49 is completely pulled into the insertion hole 44 of the side plate 43, the segment 13 made of concrete C is removed from the mold 41.

As described above, according to the above-described structure for attaching the joining tool to the mold, the attaching bolt 49 provided on the side plate 43 of the mold 41 for molding the joint end face 13a of the segment 13.
The engaging hole 31 of the joining cylinder 12 is fitted to the tip of the joining cylinder 12, and the screw part 51 at the tip of the mounting bolt 49 is further joined to the joining cylinder 1.
By screwing into the second support hole 38,
The joining cylinder 12 is attached in a state where the joining cylinder 12 is drawn toward the inner surface of the side plate 43 and is in contact therewith.

Further, since the fitting holes 31 of the joining cylinder 12 are fitted to the mounting bolts 49 having an outer diameter slightly smaller than the inside diameter of the engaging holes 31 of the joining cylinder 12, the fitting bolts are attached. The joining cylinder 12 can be positioned so as to be aligned with the axis of the mounting bolt 49, whereby the joining cylinder 12 can be attached to the side plate 43 of the mold 41 with extremely high precision.

Thus, the joining end face 1 of the segment 13
The joining cylinder 12 can be attached to the 3a with extremely high accuracy, and the segment 13 capable of performing good joining can be manufactured.

In the above example, the structure to be joined by the joining rod 11 and the joining cylinder 12 is the segment 1
3, the structure to be joined by the joining rod 11 and the joining cylinder 12 is not limited to the segment 13, and it is needless to say that the structure can be applied to any joining point between the structures. is there.

[0044]

As described above, according to the structure for attaching the connector to the formwork of the present invention, the following effects can be obtained. According to the mounting structure of the joining tool to the mold according to the first aspect, the engaging hole of the joining cylinder is fitted to the distal end side of the attaching bolt provided on the side plate of the mold for molding the joining end face of the structure. Then, by screwing the threaded portion at the tip of the mounting bolt into the support hole of the joining cylinder, the joining cylinder can be attached to the inner surface of the side plate very easily and brought into contact with it. Further, since the fitting hole of the joining cylinder is attached to the bolt formed to have an outer diameter slightly smaller than the inner diameter of the engaging hole of the joining cylinder, the joining cylinder is attached to the axis of the mounting bolt. Positioning can be performed in a state where they are aligned with each other, so that the joining cylinder can be attached to the side plate of the mold with extremely high precision. Thereby, the joining cylinder can be attached to the joining end face of the structure with extremely high accuracy, and a structure capable of performing good joining can be manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a joint between segments for explaining a joint structure to which a structure for attaching a joint to a mold according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view of the connecting rod for explaining the structure and structure of the connecting rod used in the connecting structure to which the mounting structure of the connecting tool to the formwork according to the embodiment of the present invention is applied.

FIG. 3 is a cross-sectional view of a connecting rod illustrating a configuration and a structure of a connecting rod used in a connecting structure to which a mounting structure of a connecting tool to a mold according to an embodiment of the present invention is applied.

FIG. 4 is a cross-sectional view of a part of the connecting rod for explaining the shape of the connecting rod used in the connecting structure to which the mounting structure of the connecting tool to the formwork according to the embodiment of the present invention is applied.

FIG. 5 is a cross-sectional view for explaining a fitting state between a joining member and a bridge member mounted on a joining rod used in a joining structure to which a structure for attaching a joining tool to a formwork according to an embodiment of the present invention is applied. It is.

FIG. 6 is a cross-sectional view of a joining portion of the segment for explaining a joining procedure of the segments by the joining structure to which the attachment structure to the mold of the embodiment of the present invention is applied.

FIG. 7 is a cross-sectional view at a joining portion of the segment for explaining a joining state of the segments by the joining structure to which the attaching structure to the mold of the embodiment of the present invention is applied.

FIG. 8 is a cross-sectional view of a mold to which a joining cylinder is attached for explaining a structure for attaching the joining tool to the mold according to the embodiment of the present invention.

FIG. 9 is a cross-sectional view of a formwork to which a joining cylinder is attached for explaining a structure for attaching the joining tool to the formwork according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view at a joint between segments for explaining a conventional joint structure.

FIG. 11 is a cross-sectional view of a joining portion between segments for explaining a conventional joining structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Joining rod 11a Hole part 12 Joining cylinder (joining tool) 13 Segment (structure) 13a Joining end face 17 Straight part 16, 16A Piece member 31 Engagement hole 37 Bottom part 38 Support hole 41 Mold 43 Side plate 44 Insertion hole 45 Holding mechanism 49 Mounting bolt 51 Thread

Continuing on the front page (72) Inventor Seiichi Matsushita 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Toru Taniguchi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Incorporated (72) Inventor Makoto Ukegawa 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Takeshi Corporation (72) Inventor Yasuhiko Asai 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Takeshi Inside the company (72) Inventor Chiaki Sato 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Ken Construction Co., Ltd. (72) Inventor Takashi 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Osamu Kobayashi Inside Todaken Construction Co., Ltd. 1-7-1 Kyobashi, Chuo-ku, Tokyo (72) Inventor Masayoshi Ishida 1-17-1 Kyobashi, Chuo-ku Tokyo 72) Inventor Masago Yasumoto 1-7-1, Kyobashi, Chuo-ku, Tokyo Inside Toda Construction Corporation (72) Inventor Koji Tada Kyobashi, Chuo-ku, Tokyo No. 7-1 Toda Ken Construction Co., Ltd. (72) Inventor Hiroki Someya 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Inside Ishikawajima Building Materials Industry Co., Ltd. (72) Inventor Yusuke Asano 1, Yurakucho, Chiyoda-ku, Tokyo 12-1 Ishikawashima Building Materials Industry Co., Ltd. (72) Inventor Taki Tanizaki 2-17, Nishitenma, Kita-ku, Osaka-shi, Osaka FFC Co., Ltd. F-term (reference) 2D055 DA01 EB10 GC04 4G053 AA07 BA06 BC02 BD02 BD15 BD19 EA17 EB02

Claims (1)

[Claims] 1. Both ends of a connecting rod, in which a bridge member is fitted into and fitted to holes formed on both ends of a connecting cylinder provided on the connecting end surfaces of structures to be connected to each other, respectively. By inserting the respective parts to bring the joining end surfaces of the respective structures closer to each other, the joining rod is pushed out by the piece member and pressed against the inner peripheral surface of the engaging hole of the joining cylinder, An attachment structure for attaching a joining tool composed of the joining cylinder constituting a joining structure in which both ends of a joining rod are engaged with the joining cylinder to join the structures together, to a mold for molding the structure. The side plate for molding the joint end face of the structure of the mold,
A holding mechanism is provided on the inner surface thereof for holding the joining cylinder in contact with the connecting cylinder. The holding mechanism has a mounting bolt provided so as to be able to protrude and retract from an insertion hole formed in the side plate. The bolt for use has an outer diameter slightly smaller than the engagement hole of the joining cylinder, and has a support hole formed at the tip thereof at the bottom of the engagement hole of the joining cylinder and formed of a screw. The screw portion is screwed into the support hole of the joining tube, so that the joining tube has its engaging hole fitted near the tip of the mounting bolt. A structure for attaching a connector to a formwork, wherein the attachment is attached in a state where the connector is brought into contact with the inner surface of the side plate in the state.