JP2022108827A - Joint fitting - Google Patents

Abstract

To provide a joint fitting capable of enhancing seismic performance while satisfying tensile performance.SOLUTION: A clearance reinforcing washer 45 and a front end plate having an insertion hole 11a in the center for inserting a connecting rod 4 are provided to be housed in a cylindrical housing 44 so as to be aligned with a locking member 46 and a plate spring ring 47. Disc spring washers 9 and 10 are interposed between the clearance reinforcing washers and the front end plate in a series stacking manner in which they are stacked in opposite directions.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to joint fittings that are provided in, for example, segments that constitute a tunnel or concrete box bodies and join them together.

For example, when constructing a tunnel wall with a large number of segments in a shield segment tunnel, it is necessary to assemble and join the segments.This is done by assembling rings of segments in the circumferential direction, and joining the assembled segment rings in the direction of travel of the tunnel. continue.

In conventional joining of such segments, a joint plate having a hole is embedded in the joint end face of the segment, and the joint end faces of the segments are brought into contact with each other to connect the joint plates that communicate with each other. A large number of segments are sequentially joined together by inserting bolts through the holes and screwing nuts onto the bolts.

However, in the above joint structure, the bolt must be inserted through the hole formed in the joint plate of the joint end face of the segment, and a nut must be screwed onto the bolt to be tightened. It was hanging

Therefore, the applicant is able to join segments and the like very easily in advance, and moreover, it is possible to assemble easily and accurately with a small number of parts, and the joining accuracy and strength are high, and the reliability is high. We have applied for and acquired a patent for the joint fitting described in the following patent document as a joint fitting that is both expensive and inexpensive.
Japanese Patent No. 3927896

As shown in FIGS. 5 and 6, the joint of Patent Document 1 consists of a male joint 1 and a female joint 2 which are provided on a concrete structure (member) such as a segment.

The male joint metal fitting 1 has an embedded male pin 40 made of different diameter reinforcing bars as a main body part, and its tip part is a steel joining rod 4, but the tip of the joining rod 4 is formed as a tapered part 8 with a truncated cone diameter. .

The joint rod 4 may be formed by processing one end of the embedded male pin 40 made of a reinforcing bar of different diameter. You may do so.

A groove-shaped engagement concave stepped portion 41 having a constant width is formed on the opposite side (rear side) of the tapered portion 8 with respect to the insertion direction. The tapered portion 8 extends between the tapered portion 8 and the engagement concave stepped portion 41 to form a skirt portion.

The female joint fitting 2 has an insertion hole 42 formed in the center of a front end plate 43 into which the joint rod 4 is inserted. A clearance reinforcing washer 45, a locking member 46, and a leaf spring ring 47 are contained therein. A tapered portion 8 having a base diameter, a concave portion 49 into which the extending skirt portion is inserted, and a screw portion 50 are formed at the front end of the outer periphery. Cylindrical housing 44 and embedded anchor 48 are screwed together via this screw portion 50 .

The locking member 46 is made up of two semicircular bodies 46a and 46b obtained by dividing a steel annular body with a thickness corresponding to the width of the engagement concave stepped portion 41 of the joint rod 4 into two.

The leaf spring ring 47 is an equilateral triangular leaf spring that urges the locking member 46 inwardly.

The size of the plate spring ring 47 is such that the outer sides of the engaging members 46 of the two semi-circular bodies 46a and 46b are inscribed in the centers of the sides of the equilateral triangle of the plate spring ring 47, and are made of steel. The width of the strap, that is, the depth of the leaf spring ring 47 is the same as the thickness of the locking member 46 .

Further, the size of the leaf spring ring 47 is such that the corners of the equilateral triangle of the leaf spring ring 47 abut against the inner circumference of the cylindrical housing 44 .

Next, how to use it will be explained. First, regarding assembly, in the female joint fitting 2, the cylindrical housing 44 is attached to the embedded anchor 48. At this time, as shown in FIG. 46 and leaf spring ring 47 are accommodated.

The clearance reinforcing washer 45 is arranged on the back side of the front end plate 43 of the cylindrical housing 44 so that its circular hole is aligned with the insertion hole 42 formed in the center of the front end plate 43 of the cylindrical housing 44, and the leaf spring ring 47 is an equilateral triangle. It is housed in a cylindrical housing 44 so that the corners of the two come into contact with each other.

Also, the locking member 46 is housed in the leaf spring ring 47 so as to be inscribed in the center of the side of the equilateral triangle.

In this manner, the male joint fitting 1 and the female joint fitting 2 are embedded in a concrete structure such as a segment to be joined. Insert the joint rod 4 of the mold joint fitting 1 .

In this way, the tip of the connecting rod 4 of the male fitting 1 is inserted into the locking member 46 provided in the cylindrical housing 44 of the female fitting 2 while spreading it as shown in FIG. Then, as shown in FIG. 5, the engaging member 46 is inserted into the engagement concave stepped portion 41 of the joint rod 4 and attached as a neck-like stopper. The engaging member 46 is also thick, and firmly enters the engagement concave stepped portion 41 of the joint rod 4 to serve as a strong stopper. As a result, sufficiently expected joint strength is obtained in the joint between the male joint fitting 1 and the female joint fitting 2 .

Although the metal fitting of Patent Document 1 satisfies the tensile performance, the seismic performance was not taken into consideration. The metal joint of Patent Document 1 has a structure that pursues workability in addition to tensile performance. be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint fitting which eliminates the disadvantages of the conventional example and which can improve the seismic performance while satisfying the tensile performance.
became necessary.

In order to achieve the above object, the present invention as set forth in claim 1 provides a male joint fitting having a joining rod provided on one member to be joined to each other and extending in the direction of the member on the other side, and a member on the other side. a female joint fitting provided in which the joining rod of the male joint fitting is inserted and engaged with the joining rod;
The male joint metal fitting has a tapered portion formed on the tip end side of the joint rod and an engagement recessed step portion formed on the opposite side to the insertion direction thereof,
The female fitting includes a cylindrical housing having an insertion hole in the center into which the joint rod is inserted, and consisting of a female receiving box that engages with the embedded anchor;
In this cylindrical housing, two semi-circular locking members obtained by dividing an annular body with a thickness corresponding to the width of the engaging concave stepped portion into two are provided, and these locking members are biased toward the inner peripheral side. An equilateral triangular leaf spring ring is arranged, the outside of the two semi-circular locking members is inscribed in the center of the side of the equilateral triangle of the leaf spring ring, and the plate is attached to the inner circumference of the cylindrical housing. In the joint fitting arranged so that the corners of the equilateral triangle of the spring ring are in contact,
A clearance reinforcing washer and a front end plate having an insertion hole in the center for inserting the connecting rod are provided as components to be housed in the cylindrical housing so as to be aligned with the locking member and the plate spring ring. The gist of the present invention is that the disc spring washer is interposed between the clearance reinforcing washer and the front end plate in a series stacking manner in which the disc spring washer is stacked in the opposite direction.

According to the present invention of claim 1, the tensile performance is obtained by inserting the joint rod of the male joint fitting into the female joint fitting, and by using this joint rod, the locking member is spread out against the leaf spring ring. by inserting the locking member into the engagement concave stepped portion of the joint rod to lock the joint rod, and attaching the locking member to the joint rod as a neck-shaped stopper so as to protrude from the outer circumference of the joint rod, Thereby, the male joint fitting and the female joint fitting can be joined.

In addition, since the conical spring washers are interposed in the series stacking method in which the conical spring washers are superimposed in the opposite direction, the conical spring washers become a deformable cushion material, and the seismic resistance can be exhibited.

Clearance is required in the tensile direction, which is necessary for seismic performance, but at the same time, rigidity is also required in the tensile direction. According to the present invention, the tensional rigidity can be increased to some extent by extending the clearance in the axial direction to the small-diameter portion of the male metal fitting, and adding a cushion material formed by deforming the disc spring washer to the clearance.

Moreover, in the case of the parallel stacking method of disc spring washers, a large load can be generated with a small stroke (displacement), but in the case of the series stacking method, a small load generates a large stroke (displacement). be able to.

In addition, since disc spring washers are used to secure the clearance, it is possible to deal with the fact that there is a range in the required clearance length due to earthquake-resistant design. can be minimized.

According to the second aspect of the present invention, the front end plate is a flat plate having a thickness and can be accommodated in the cylindrical housing as an opening cover.

According to the second aspect of the present invention, the front end plate is a thick flat plate having no concave portion, and is accommodated in the cylindrical housing as an opening lid, so that the cylindrical housing becomes a closed space, and the disc spring washer is a cylindrical housing. By putting it inside, it comes into contact with this front end plate, and the front end plate can be used as a reaction force body to deform without deviation, thereby exhibiting earthquake resistance performance.

According to a third aspect of the present invention, the front end plate is screwed into the cylindrical housing.

According to the third aspect of the present invention, the front end plate can be easily and securely screwed into the cylindrical housing as an opening cover, and is difficult to come off. Since the lid can be closed after it is housed inside, it is possible to easily set the disc spring washer.

The fourth aspect of the present invention is characterized in that the front end plate, disc spring washer, and clearance reinforcing washer have substantially the same diameter.

According to the fourth aspect of the present invention, the front end plate, the disc spring washer, and the clearance reinforcing washer have substantially the same diameter, so that the diameter of the disc spring washer can be maximized. Sandwiched between the front end plate and the clearance reinforcing washer, it deforms and exhibits earthquake resistance performance.

As described above, the joint fitting of the present invention is provided in the segments constituting the tunnel and the concrete box, and as a joint fitting for joining these, it is possible to improve the seismic performance while satisfying the tensile performance.

1 is an exploded side view of a component configuration showing an embodiment of a joint fitting of the present invention; FIG. 1 is a plan view of a component configuration showing an embodiment of a joint fitting of the present invention; FIG. 1 is a partially cutaway side view showing a state before joining a male joint and a female joint in the first embodiment of the joint of the present invention; FIG. 1 is a partially cutaway side view showing a state before joining a male joint and a female joint in the first embodiment of the joint of the present invention; FIG. It is a side view of the joint metal fitting which shows a conventional example. It is explanatory drawing of the joint metal fitting which shows a conventional example. FIG. 11 is a perspective view of joining of joint fittings showing a conventional example.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an exploded side view of the parts structure showing one embodiment of the joint of the present invention, which consists of a male joint 1 and a female joint 2 which are provided on a concrete structure (member) such as a segment.

The male joint metal fitting 1 has an embedded male pin 40 made of different diameter reinforcing bars as a main body part, and its tip part is a steel joining rod 4, but the tip of the joining rod 4 is formed as a tapered part 8 with a truncated cone diameter. .

Although the joint rod 4 may be formed by processing one end of the embedded male pin 40 made of different diameter reinforcing bars, the lower half of the joint rod 4 is screwed into the embedded male pin 40 as a screw structure 40a. .

A groove-shaped engagement concave stepped portion 41 having a constant width is formed on the opposite side (rear side) of the tapered portion 8 with respect to the insertion direction. The tapered portion 8 extends between the tapered portion 8 and the engaging recessed stepped portion 41 to form a skirt portion.

The female joint metal fitting 2 has a cylindrical housing 44 with open front and rear ends as a female receiving box at the end of an embedded anchor 48 made of large-diameter different-diameter reinforcing bars as a main body into which the joint rod 4 is inserted.

The tip of the embedded anchor 48 is formed with a concave portion 49 into which the tapered portion 8 of the truncated cone diameter at the tip of the joint rod 4 and the extending skirt portion are inserted, and the cylindrical housing 44 encloses the front of the concave portion 49. becomes.

The cylindrical housing 44 has a threaded portion 50 formed at the front end of the outer circumference of the embedded anchor 48 . The cylindrical housing 44 and the embedded anchor 48 may be screwed together via this threaded portion 50, or may be welded together.

Items to be housed in the cylindrical housing 44 include a locking member 46, a leaf spring ring 47, and a clearance reinforcing washer 45 having an insertion hole 45a in the center for inserting the joint rod 4. As in the example, the locking member 46 is made up of two semicircular bodies 46a and 46b obtained by dividing a steel annular body with a thickness corresponding to the width of the engagement concave stepped portion 41 of the joint rod 4 into two. be.

The leaf spring ring 47 is an equilateral triangular leaf spring that urges the locking member 46 inwardly. The size of the plate spring ring 47 is such that the outer sides of the engaging members 46 of the two semi-circular bodies 46a and 46b are inscribed in the centers of the sides of the equilateral triangle of the plate spring ring 47, and are made of steel. The width of the strap, that is, the depth of the leaf spring ring 47 is the same as the thickness of the locking member 46 .

Further, the size of the leaf spring ring 47 is such that the corners of the equilateral triangle of the leaf spring ring 47 abut against the inner circumference of the cylindrical housing 44 .

Reference numeral 3 in the drawing designates a resin or metal material interposed between the two locking members 46 when the locking members 46 are housed in the leaf spring ring 47 so as to be inscribed in the centers of the sides of the equilateral triangle. The spacer 3 is interposed to separate the joint ends of the two engaging members 46 to increase the internal diameter.

The shape of the spacer 3 may be circular, but preferably elliptical.

By interposing the spacer 3 in this manner, the leaf spring ring 47 is deformed from an equilateral triangular shape, but there is no problem. Also, the leaf spring ring 47 may be formed in a triangular shape other than an equilateral triangle.

When the distal end portion of the connecting rod 4 of the male fitting 1 is inserted into the cylindrical housing 44 of the female fitting 2 while expanding it, the spacer 3 is interposed. , the two semi-circular locking members 46 can be spaced apart from each other to increase the internal diameter, so that the tapered portion 8 on the distal end side of the connecting rod 4 is held within the locking members 46. Sufficient clearance can be ensured when pushing in.

Further, the interposed spacer 3 is dropped as it is into the concave portion 49 of the embedded anchor 48 by the large-diameter different-diameter reinforcing bar as the main body portion.

Umbrella-shaped conical disc spring washers 9 and 10 are placed in opposite directions so as to be housed in the cylindrical housing 44 so as to line up with the locking member 46 and leaf spring ring 47. It was interposed in a serial stacking method in which the two layers were stacked facing each other. The disk spring washers 9 and 10 have insertion holes 9a and 10a into which the joint rod 4 is inserted.

A force (deformation range is about 2 mm) acts on the conical spring washers 9 and 10 to restore their shape, and this acts as a spring effect. By arranging these disc spring washers 9 and 10 in a stacked combination, it is possible to change load characteristics in which a single disc spring washer is insufficient in load. In addition, in the present invention, the series stacking method in which the stacks are stacked in the opposite direction, that is, the deflection is several times that in the case of a single face-to-face combination. (Improve deflection characteristics)

In the figure, reference numeral 11 denotes a front end plate, which is a thick flat plate and has an insertion hole 11a in the center into which the joint rod 4 is inserted.

The front end plate 11 has a screw groove 11b formed on its outer peripheral surface, and the cylindrical housing 44 is provided with a screw 44a with which this screw groove 11b engages, and the two are screwed together.

Next, how to use it will be explained. First, regarding assembly, in the female joint fitting 2, the cylindrical housing 44 is attached to the embedded anchor 48. At this time, as shown in FIG. 46, leaf spring ring 47, spacer 3, clearance reinforcing washer 45, disc spring washers 9 and 10 are housed, and front end plate 11 covers the opening.

FIG. 3 shows the state in which the insertion hole 11a of the front end plate 11, the insertion holes 10a and 11a of the disc spring washers 9 and 10, and the insertion hole 45a of the clearance reinforcing washer 45 are aligned.

The leaf spring ring 47 is housed in the cylindrical housing 44 so that the corners of the equilateral triangle are in contact with each other, and the locking member 46 is housed in the leaf spring ring 47 so as to be inscribed in the center of the side of the equilateral triangle.

When the locking member 46 is housed in the leaf spring ring 47 so as to be inscribed in the center of the side of the equilateral triangle, the spacer 3 made of resin or metal is interposed between the two locking members 46 so that the two locking members 46 are separated. The two locking members 46 separate the joint ends to enlarge the inner diameter.

In this manner, the male joint fitting 1 and the female joint fitting 2 are embedded in a concrete structure such as a segment to be joined. Insert the joint rod 4 of the mold joint fitting 1 .

In this way, the tip of the connecting rod 4 of the male fitting 1 is inserted into the locking member 46 provided in the cylindrical housing 44 of the female fitting 2 while spreading it as shown in FIG. Then, as shown in FIG. 4, the engaging member 46 is inserted into the engagement concave stepped portion 41 of the joint rod 4 and attached as a neck-like stopper. The engaging member 46 is also thick, and firmly enters the engagement concave stepped portion 41 of the joint rod 4 to serve as a strong stopper. As a result, sufficiently expected joint strength is obtained in the joint between the male joint fitting 1 and the female joint fitting 2 .

The disc spring washers 9 and 10 are accommodated between the clearance reinforcing washer 45 and the front end plate 11, which are in contact with the locking member 46, so that the male joint fitting 1 and the female joint fitting 2 are subjected to a pulling or pushing force due to an earthquake or the like. When the force is applied, the overlapping disc spring washers 9 and 10 serve as a deformable cushioning material, and the seismic performance can be exhibited.

DESCRIPTION OF SYMBOLS 1... Male joint metal fitting 2... Female joint metal fitting 3... Spacer 4... Joining rod 8... Taper part 9, 10... Disc spring washer 9a, 10a... Insertion hole 11... Front end plate 11a... Insertion hole 11b... Screw groove 40... Embedded male pin 40a Screw structure 41 Engagement concave step 42 Insertion hole 43 Front end plate 44 Cylindrical housing 44a Screw 45 Clearance reinforcing washer 45a Insertion hole 46 Locking members 46a, 46b Half Circular body 47 Leaf spring ring 48 Embedded anchor 49 Recessed portion 50 Threaded portion

Claims (4)

A male joint fitting provided on one side member to be joined to each other and having a joining rod extending in the direction of the member on the other side, and a joining rod of the male joint fitting provided on the member on the other side, into which the joining rod is inserted, It consists of a female joint fitting that locks this joint rod,
The male joint metal fitting has a tapered portion formed on the tip end side of the joint rod and an engagement recessed step portion formed on the opposite side to the insertion direction thereof,
The female fitting includes a cylindrical housing having an insertion hole in the center into which the joint rod is inserted, and consisting of a female receiving box that engages with the embedded anchor;
In this cylindrical housing, two semi-circular locking members obtained by dividing an annular body with a thickness corresponding to the width of the engaging concave stepped portion into two are provided, and these locking members are biased toward the inner peripheral side. An equilateral triangular leaf spring ring is arranged, the outside of the two semi-circular locking members is inscribed in the center of the side of the equilateral triangle of the leaf spring ring, and the plate is attached to the inner circumference of the cylindrical housing. In the joint fitting arranged so that the corners of the equilateral triangle of the spring ring are in contact,
A clearance reinforcing washer and a front end plate having an insertion hole in the center for inserting the connecting rod are provided as components to be housed in the cylindrical housing so as to be aligned with the locking member and the plate spring ring. 1. A joint fitting characterized in that a disc spring washer is interposed between a clearance reinforcing washer and a front end plate in a series stacking manner in which the disc spring washer is placed in the opposite direction. 2. A fitting according to claim 1, wherein the front end plate is a thick plate and fits in the cylindrical housing as an open lid. 3. A fitting according to claim 2, wherein the front end plate is screwed onto the cylindrical housing. 4. The fitting according to any one of claims 1 to 3, wherein the front end plate, disc spring washer, and clearance reinforcing washer have approximately the same diameter.

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