JP2001140591A - Segment joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment joint section structure capable of connecting segments together very simply, reliably, and firmly in particular. SOLUTION: A male metal 3 is protruded on the connecting end face of a segment 1, and a female metal 4 to be inserted with the male metal 3 is buried on the connecting end face of a segment 2. A plurality of node sections 9 are formed on the protruded portion from the connecting end face of the connecting pin 6 of the male metal 3. A washer 13 formed with a plurality of pawls 18 locked on the node sections 9 to prevent the extraction of the connecting pin 6 is stored in the female metal 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a segment mainly enabling concrete segments to be joined very easily, reliably and firmly.

[0002]

2. Description of the Related Art Conventionally, as a method for joining concrete segments to each other, for example, a method shown in FIG. 4 is known. That is, the segments 30 to be joined
And 31 are buried in the joint end surfaces of both of them, respectively, and butt the connecting fittings 33 so that the two bolt holes 32 coincide with each other. From the other connecting bracket 33
The segments 30 and 31 are joined by inserting a connecting bolt 34 into the bolt hole 32 of the above and screwing a connecting nut 35 into a penetrating portion of the male screw portion 34a.

[0003]

However, in such a joining method, the connecting nuts 35 must be fastened one by one to the external thread portions 34a of the connecting bolts 34 inserted into the bolt holes 32 of the connecting fittings 33, so that the work is extremely difficult. There were problems such as troublesomeness. Also, at least the connecting nut 3
Since it is necessary to provide a concave portion 36 for tightening the connection nut 35 at the end of the segment 31 on the side where the 5 is tightened, not only the inside of the segment cannot be formed smoothly, but also the concave portion 36 is formed in the segment forming mold. Therefore, there is also a problem that it is troublesome to manufacture the segments and the molding frame thereof.

Further, when the diameter of the segment becomes large, work at a high place is required when tightening the connecting bolt 34, so that not only there is a safety problem for the worker, but also the parts such as the connecting bolt may be erroneously dropped. Was done. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a joint structure of a segment in which segments can be connected very easily, reliably and firmly.

[0005]

As a means for solving the above-mentioned problems, a joint joint structure of a segment according to the present invention is characterized in that a male metal fitting is provided on one joint end face of segments to be joined to each other. The female fitting into which the male fitting is inserted is buried in the other joining end face, and a plurality of joints are provided at a portion protruding from the joining end face of the male fitting, and the plurality of joints are provided in the female fitting. It has a plurality of projections which lock and prevent the male fitting from being detached.

According to a second aspect of the present invention, in the segment joint structure according to the first aspect, a plurality of male screw portions project from the joint end face of the male fitting as a node, and a plurality of claws project as projections in the female fitting. Each has a provided washer. According to a third aspect, in the joint structure of the segment according to the second aspect, the pawl is deformed in the insertion direction of the connecting pin.

According to a fourth aspect, in the segment joint structure according to the second or third aspect, the female metal fitting has a plurality of washers therein.

[0008]

1 to 3 show an embodiment of the present invention. In the drawings, adjacent concrete segments 1 and 2 are joined by a male metal fitting 3 and a female metal fitting 4. FIG. The male fitting 3 protrudes from the joining end face of the segment 1, and the female fitting 4 is embedded in the joining end face of the segment 2.

The male fitting 3 is formed from an embedded fitting 5 embedded in the joint end face of the segment 1 and a connecting pin 6 projecting from the embedded fitting 5 and having a distal end inserted into the female fitting 4. I have. The embedding fitting 5 is formed, for example, in the shape of a column having a circular cross section, and a screw hole 7 is formed at a predetermined depth on the tip side. The embedding metal fitting 5 is embedded in the concrete at the joint end face of the segment 1 and is reinforced in the concrete and is reinforced as a reinforcing bar for the segment. ) Is fixed by welding. Furthermore, reinforcement is provided by arranging a shear reinforcement around the embedding fitting 5 as necessary.

The connecting pin 6 is mounted on the side of the embedding fitting 5.
The male screw portion 8 screwed into the screw hole 7 is inserted into the female fitting 4 on the opposite side, and at the same time, a claw 1 described later in the female fitting 4 is inserted.
8, each of which has a plurality of joints 9 to be locked. The joint portion 9 basically has an uneven shape, for example, a male screw shape or a saw-tooth shape, and it is particularly desirable to have the same male screw shape as the male screw portion 8, so that the number of processes is reduced and the manufacture is easy. In addition, there is an effect that there is no direction when the connecting pin 6 is screwed into the screw hole 7 of the embedding fitting 5 and that the handling of the connecting pin 6 becomes easy.

On the other hand, the female fitting 4 is formed to have a female fitting main body 10, an adjusting pipe 11 built in the female fitting main body 10, a plurality of spacers 12, and a plurality of washers 13, respectively. The female fitting body 10 has a disc-shaped tip plate 15 on the male fitting 3 side of a cylindrical body 14 having an inner diameter larger than the outer diameter of the connecting pin 6, and a disc-shaped rear end plate on the opposite side. 16 are formed, and a guide tube 17 slightly larger than the outer diameter of the connecting pin 6 is formed at a substantially central portion of the end plate 15 so as to protrude therefrom.

In principle, these parts are integrally assembled by welding or the like, but at least the cylindrical body 14 and the front end plate 15 or the cylindrical body 14 and the rear end plate 16 are assembled by a screw type. It is desirable that it can be taken in and out even after the adjusting tube 11, the spacer 12, and the washer 13 are assembled.

At a substantially central portion of the end plate 15, a through hole 15a through which the connection pin 6 passes is formed.
The cylindrical body 14 and the guide tube 17 communicate with each other via a. The adjusting tube 11 is formed in a cylindrical shape having an inner diameter through which the connecting pin 6 can be inserted. The spacer 12 and the washer 13 are both formed in a donut plate shape through which the connecting pin 6 can penetrate. A plurality of claws 18 protrude.

The pawl 18 is projected radially toward the center of the washer 13 and is formed by being slightly bent (deformed) in the insertion direction of the connecting pin 6 (toward the adjustment pipe 11).
Further, the control tube 11 has a plurality of spacers 12 built-in on the rear end plate 16 side and the opposite side thereof, and a washer between the control tube 11 and the spacer 12, between the spacers 12 and 12, and between the spacer 12 and the front end plate 15. 13 are built in.

At this time, the washer 13 is fixed in the cylindrical body 14 by strongly clamping the periphery of the washer 13 between the adjusting tube 11 and the plurality of spacers 12. The female fitting 4 thus formed is embedded in the concrete at the joint end face of the segment 2 and is an anchor member made of a reinforcing steel bar or a reinforcing steel material of the segment or a reinforcing steel bar arranged in the concrete (both not shown). It is fixed to. Furthermore, reinforcement is provided by arranging a shear reinforcing bar around the female metal fitting 4 as necessary.

A portion of the female fitting 4 projecting from the joint end face of the connecting pin 6 into the cylindrical body 14 is inserted through the guide tube 17. And the claw 18 of the washer 13
Is locked to the node 9 of the connecting pin 6 so that the connecting pin 6 is fixed in the female metal fitting 4 so as not to come off, whereby the adjacent segments 1 and 2 are securely and firmly joined.

At this time, the claw 18 is slightly bent in the insertion direction of the connecting pin 6 (toward the adjustment tube 11),
The connecting pin 6 can be smoothly inserted into the female fitting 4, and the pull-out resistance of the connecting pin 6 can be further increased. Also, by appropriately increasing or decreasing the number of washers 13, it is possible to adjust the joining strength of the segments 1 and 2, thereby easily providing a joint portion corresponding to required performance.

The joint portion is reinforced by providing a tenon and a tenon hole which engage with each other on the joint surface between the segments 1 and 2 as necessary.

[0019]

The present invention has the above-described structure,
In particular, the male fitting has a plurality of joints at a portion protruding from the joining end face, and the female fitting has a plurality of projections which are locked to the joints to prevent the male fitting from being detached. By simply inserting the more protruding portion into the female metal fitting, it becomes possible to join the adjacent segments very easily and surely firmly, and the assembly of the segments can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a structure of a joint portion of a concrete segment, (a) showing a joined state, and (b) showing a state before joining.

2 (a) to 2 (c) show a female fitting main body, (a) is a partially cutaway front view, and (b) and (c) are (a), respectively.
, (D) and (e) show embedded metal fittings, (d) is a partially cutaway front view, and (e).
FIG. 4 is a cross-sectional view taken along the line C-D in FIG. 4D, and FIG.

3 (a) and 3 (b) show a control tube, (a) is a partially cutaway front view, (b) is a side view, (c) and (d)
Shows a control tube, (c) is a sectional view thereof, (d) is a side view thereof, (e) and (f) show washers, (e) is a sectional view thereof, and (f) is a side view thereof. is there.

FIG. 4 is a sectional view showing the structure of a conventional joint of a concrete segment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 segment 2 segment 3 Male fitting 4 Female fitting 5 Embedding fitting 6 Connecting pin 7 Screw hole 8 Male screw part 9 Joint part 10 Female fitting main body 11 Adjustment pipe 12 Spacer 13 Washer 14 Cylindrical body 15 Tip plate 16 Rear end plate 17 Guide pipe 18 nails (projections)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasushi Yakuma 4-2-2 Shiba, Minato-ku, Tokyo Inside Geostar Co., Ltd. (72) Inventor Dai Dai 2-3-4 Shiba, Minato-ku, Tokyo Geostar Co., Ltd. F-term (reference) 2D055 EB00 GC04 KA00

Claims (4)

[Claims] 1. A male fitting protrudes from one joining end face of a segment to be joined to each other, a female fitting into which the male fitting is inserted is buried in the other joining end face, and protrudes from the joining end face of the male fitting. A joint portion structure for a segment, comprising: a plurality of joints in a portion to be engaged; and a plurality of projections for locking the joints in the female fitting to prevent the male fitting from coming off. 2. The method according to claim 1, wherein a plurality of male screw portions are provided as joints at a portion protruding from the joint end surface of the male fitting, and a washer having a plurality of claws is provided as a projection in the female fitting. 2. The joint structure of the segment according to 1. 3. The joint structure for a segment according to claim 2, wherein the pawl is deformed in a direction in which the connecting pin is inserted. 4. The joint structure for a segment according to claim 2, wherein the female fitting has a plurality of washers.