JP2003336497A - Joint metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extremely easily join segments, etc., to be easily and accurately assembled with a small number of components, to have high joining accuracy, strength, and reliability, and to be produced at low cost. <P>SOLUTION: This joint metal fitting comprises a male joint metal fitting 1 and a female joint metal fitting 2, and the male joint fitting 1 is formed with a tapered part 8 in the tip side of a joining rod 4, and an engagement recessed step part 41 in its lower side. The female joint metal fitting 2 is disposed with a cylindrical housing 44 having an insertion hole 42 for inserting the joining rod 4 in its center, two semicircular lock members 46 formed by halving an annular body with the thickness corresponding to the width of the engagement recessed step part 41 in the cylindrical housing 44, and an equilateral triangle leaf spring annular body 47 energizing the lock members 46 to the internal circumferential side. The outsides of the two semicircular lock members 46 are internally contact with the center of a side of the equilateral triangle of the leaf spring annular body 47, and the corner parts of the equilateral triangle of the leaf spring annular body 47 abut on the internal circumference of the cylindrical housing 44. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided, for example, in a segment or a concrete box which constitutes a tunnel.
The present invention relates to a joint fitting for joining these.

[0002]

2. Description of the Related Art For example, in a shielded segment tunnel, when constructing a tunnel wall body with a large number of segments, it is necessary to assemble and join the segments. This is a segment assembly ring in the circumferential direction, and the assembled segment ring is also used. Join in the tunnel direction.

[0003] In the conventional joining of such a segment, a joint plate having a hole is embedded in the joining end surface of the segment, and the rear side thereof is boxed out so that the joining end surfaces of the segments are brought into contact with each other to communicate with each other. A bolt is inserted through the hole of the joint plate, and a nut is screwed onto this bolt, so that a large number of segments are sequentially joined to each other.

[0004]

However, in the above joining structure, the bolt must be inserted into the hole formed in the joint plate of the joining end face of the segment, and the nut must be screwed and tightened. However, the work was extremely complicated and time-consuming.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example and to join the segments and the like very easily. Moreover, it is possible to assemble easily and accurately with a small number of members. Another object of the present invention is to provide an inexpensive fitting with high joint accuracy and strength and high reliability.

[0006]

In order to achieve the above object, the present invention is, firstly, a male joint having a joining rod provided on members on one side to be joined to each other and extending toward a member on the other side. A metal fitting and a female fitting fitting provided on the other member, into which the joining rod of the male fitting fitting is inserted, and which locks the joining rod, wherein the male fitting fitting is the tip of the joining rod. A cylindrical housing having a tapered portion on its side and an engaging recessed portion formed on the lower side thereof, and the female joint fitting has an insertion hole at the center into which the joining rod is inserted, and the cylindrical housing. Two semi-circular locking members into which an annular body having a thickness corresponding to the width of the engaging concave step portion is divided into two, and an equilateral triangular plate for biasing these locking members toward the inner peripheral side. The spring ring is placed, and the outer sides of the two semicircular locking members are in the center of the sides of the equilateral triangle of the leaf spring ring. Contact, also, in which the corners of an equilateral triangle of the leaf spring ring body relative to the inner peripheral cylindrical housing is summarized in that which is arranged so as to contact.

Secondly, the cylindrical housing is formed of a female receiving box that is screwed into the embedded anchor or is formed in the embedded box anchor, and has an insertion hole into which the connecting rod is inserted. The gist of the invention is to screw a front lid at the center.

Thirdly, a male joint fitting provided on one member to be joined to each other and having a joining rod extending in the direction of the other member, and a male joint fitting provided on the other member, And a female joint fitting for locking the joining rod. The male joint fitting forms a taper portion on the tip side of the joining rod, and an engaging concave step is formed on the lower side thereof. A cylindrical housing having a central insertion hole into which the connecting rod is inserted, and a thickness corresponding to the width of the engaging recessed step portion in the cylindrical housing. The two ring members are divided into two semicircular locking members, and a triangular plate spring ring member for urging these locking members toward the inner peripheral side is arranged, and a spacer is provided inside the two locking members. These interlocking members separate the joining ends from each other to expand the inner diameter and Was inscribed on the sides of the triangle of the leaf spring annulus, also those corners of the triangular plate spring ring body relative to the inner peripheral cylindrical housing is summarized in that which is arranged so as to contact.

According to the first aspect of the present invention, the connecting rod of the male joint fitting is inserted into the female joint fitting, and the engaging member pushes and spreads the locking member against the leaf spring ring body. The stopper member is inserted into the engaging concave step portion of the joining rod to lock the joining rod, and the engaging member is attached to the joining rod as a neck-shaped stopper so as to project to the outer periphery of the joining rod. The male joint fitting and the female joint fitting can be joined together. It should be noted that it is the equilateral triangle leaf spring ring body that biases the locking member toward the inner peripheral side, and the corner portion of the equilateral triangle abuts against the inner circumference of the cylindrical housing of this equilateral triangle leaf spring ring body. By arranging in this manner, the centers can be aligned and housed in the cylindrical housing.

Further, the locking member is two semicircular parts obtained by dividing the ring body into two, and the outer side is inscribed in the center of the side of the equilateral triangle so that the centers can be matched. It can be housed in the cylindrical housing and in the leaf spring annulus, and as a result, it is possible to keep the central position of each member aligned for inserting the joining rod. In this way, the equilibrium of the equilateral triangular leaf spring and the perfect circle ring enables the original shape to be accurately restored regardless of the position of the cylindrical housing.

Further, the number of members is extremely small, such as one leaf spring ring member and two semicircular locking members, and it is easy to set each member.

In addition to this, the locking member is a semicircular member that is attached as a neck-shaped stopper so as to project from the outer periphery of the joint rod as a ring body. Enters into the engaging concave step of the joining rod and becomes a strong stopper. As a result, a sufficiently expected joining strength can be obtained in joining the male joint fitting and the female joint fitting.

According to the second aspect of the present invention, in addition to the above operation, a female receiving box having a front end plate and an open rear surface is simply screwed into an embedded anchor to form a cylindrical housing. It's done and easy.

According to the third aspect of the present invention, the cylindrical housing is formed in the embedded box anchor, has strength as an integrated anchor, and has a semi-circular locking with one leaf spring ring. It is possible to prevent the joining rod including the members from coming off by a front lid that is screwed.

According to the fourth aspect of the present invention, by interposing the spacer, the two semicircular or semielliptical locking members separate the joining ends from each other to increase the inner diameter. Therefore, a sufficient clearance can be secured when the tapered portion on the tip end side of the joining rod is pushed into the locking member.

As a result, the taper portion on the distal end side of the joining rod is obliquely inserted, and the locking member itself may be hooked, and as a result, the locking member may be removed from the leaf spring ring body. It can be prevented. Further, the interposed spacer can be dropped as it is into the concave portion of the embedded anchor formed by the large diameter different diameter reinforcing bar as the main body portion when the tapered portion on the tip side of the joining rod is pushed into the locking member.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view showing a first embodiment of a joint fitting of the present invention, and FIG. 2 is an explanatory view of the same.

The joint fitting of the present invention also comprises a male joint fitting 1 and a female joint fitting 2 which are respectively provided on concrete structures (members) such as segments.

The male joint fitting 1 has an embedded male pin 40 made of rebar having a different diameter as a main body, and a tip portion thereof is a steel joining rod 4, and the joining rod 4 has a tapered portion 8 having a truncated cone diameter at its tip. Formed as.

Although the joining rod 4 may be formed by processing one end of the embedded male pin 40 made of a rebar having a different diameter, the lower half of the joining rod 4 has a screw structure 40a on the embedded male pin 40. It may be screwed.

A groove-like engagement concave step portion 41 having a constant width is formed on the lower side (rear side) of the taper portion 8 with a slight interval. A skirt portion where the taper portion 8 extends is provided between the taper portion 8 and the engaging recessed step portion 41.

In the female joint fitting 2, an insertion hole 42 into which the joining rod 4 is inserted is formed in the center of a front end plate 43, and a cylindrical housing 44 having a rear end open as a female receiving box, and this cylindrical housing. The clearance reinforcing washer 45, the locking member 46, and the leaf spring ring 4 are contained in the housing 44.
7, and a concave portion 49 into which a tapered portion 8 having a truncated cone diameter at the tip of the joining rod 4 and a skirt portion extending therefrom are inserted at the tip of an embedded anchor 48 made of a rebar having a large diameter as a main body.
And the screw part 50 was formed in the front end of the outer periphery. The cylindrical housing 44 and the embedded anchor 48 are screwed together via the screw portion 50.

The locking member 46 is composed of two semi-circular members 46a and 46b obtained by dividing a steel ring member having a thickness corresponding to the width of the engaging recessed step portion 41 of the joining rod 4 into two parts. is there.

The leaf spring ring body 47 is an equilateral triangle leaf spring for urging the locking member 46 toward the inner peripheral side, and is formed by a steel band, and the corner portions are bent and bent. . Further, the size of the leaf spring ring body 47 is the same as the two semicircular bodies 4 described above.
The outside of the locking members 46 of 6a and 46b is the leaf spring ring 4
7 is inscribed in the center of the side of the equilateral triangle, and the width of the steel strip, 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 body 47 is such that the leaf spring ring body 4 is larger than the inner circumference of the cylindrical housing 44.
The corners of the regular triangle 7 are in contact with each other.

Next, the usage will be described. First, as for 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. 2, the clearance reinforcing washer 45 and the locking member are attached in the cylindrical housing 44. 46 and the leaf spring ring 47 are housed.

FIG. 3 shows the state, in which the clearance reinforcing washer 45 is arranged on the back side of the front end plate 43 with the circular hole at the center thereof aligned with the insertion hole 42 formed at the center of the front end plate 43 of the cylindrical housing 44. The leaf spring ring 47 is housed in the cylindrical housing 44 so that the corners of the equilateral triangle come into contact with each other.

Further, 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, when the male joint fitting 1 and the female joint fitting 2 are embedded in a concrete structure such as a segment to be joined and joined, the insertion hole of the tubular housing 44 of the female joint fitting 2 is inserted. The joining rod 4 of the male joint fitting 1 is inserted into 42.

In this way, the tip of the joining rod 4 of the male joint fitting 1 pushes the locking member 46 provided in the cylindrical housing 44 of the female joint fitting 2 as shown in FIG. It is inserted while unfolding, and then, as shown in FIG. 5, the locking member 46 enters the engaging concave step portion 41 of the joining rod 4 and is attached as a neck-shaped stopper. The locking member 46 also has a thickness and firmly enters the engaging recessed step portion 41 of the joining rod 4 to form a strong stopper. As a result, a sufficiently expected joining strength is obtained for joining the male joint fitting 1 and the female joint fitting 2.

FIG. 6 shows a second embodiment of the present invention. As a heavy load type, the female joint fitting 2, the cylindrical housing 44 and the embedded box anchor 51 are integrally formed with the anchor body. The front lid 52 having the insertion hole 53 at the center where the joining rod 4 is inserted is screwed to the cylindrical housing 44.

The cylindrical housing 44 includes a recessed portion 49 into which a tapered portion 8 having a circular truncated cone diameter at the tip of the joining rod 4 and a skirt portion to be inserted are inserted, a leaf spring ring body 47, a locking member 46, and a clearance reinforcing washer 45. This is achieved by forming the storage portion and the storage portion of the front lid 52 in stages.

Also in this embodiment, the connection of the male joint fitting 1 and the female joint fitting 2 is the same as in the first embodiment.

FIGS. 7 and 8 show a third embodiment of the present invention. When the locking member 46 is housed in the leaf spring ring body 47 so as to be inscribed in the center of the side of the equilateral triangle, 2 The spacers 3 made of resin or metal are interposed inside the individual locking members 46 so that the two locking members 46 separate the joint end portions from each other to expand the inner diameter.

The shape of the spacer 3 may be circular, but an elliptical diameter is desirable, and its major axis is at least approximately the same as the maximum diameter of the tapered portion 8 having the truncated cone diameter at the tip of the joining rod 4. Further, the spacer 3 has a locking flange 3a.

By interposing the spacer 3 in this manner, the leaf spring ring body 47 is deformed in the shape of an equilateral triangle, but this does not cause any trouble. Further, the leaf spring ring body 47 may have a triangular shape other than the equilateral triangle.

In the case of the third embodiment, the male joint fitting 1
By inserting the spacer 3 when the tip end of the joining rod 4 is inserted while expanding the locking member 46 provided in the cylindrical housing 44 of the female joint fitting 2,
The semi-circular locking members 46 can separate the joining ends from each other to expand the inner diameter, and thus the joining rod 4 can be formed.
A sufficient clearance can be secured when the taper portion 8 on the tip end side of is pushed into the locking member 46.

Further, the interposed spacer 3 can be dropped as it is into the concave portion 49 of the embedded anchor 48 by a large diameter rebar having a large diameter as a main body.

[0039]

As described above, the joint fitting of the present invention is
It is possible to join segments and the like very easily, and it is possible to assemble easily and accurately with a small number of members, high joining accuracy and strength, high reliability, and inexpensive. is there.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a joint fitting of the present invention.

FIG. 2 is an explanatory view showing the first embodiment of the joint fitting of the present invention.

FIG. 3 is a plan view of the inside of the cylindrical housing showing the first embodiment of the joint fitting of the present invention.

FIG. 4 is a perspective view showing a first stage of joining the male fitting and the female fitting in the first embodiment of the fitting of the present invention.

FIG. 5 is a perspective view showing a second step of joining the male fitting and the female fitting in the first embodiment of the fitting of the present invention.

FIG. 6 is a side view showing a second embodiment of the joint fitting of the present invention.

FIG. 7 is a plan view of the inside of a cylindrical housing showing a third embodiment of the fitting of the present invention.

FIG. 8 is a vertical cross-sectional side view inside the cylindrical housing showing the third embodiment of the joint fitting of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Male joint fitting 2 ... Female joint fitting 3 ... Spacer 3a ... Flange 4 ... Joining rod 8 ... Tapered part 40 ... Embedded male pin 40a ... Screw structure 41 ... Engaging concave step 42 ... Insertion hole 43 ... Front end Plate 44 ... Cylindrical housing 45 ... Clearance reinforcing washer 46 ... Locking members 46a, 46b ... Semicircular body 47 ... Leaf spring ring body 48 ... Embedded anchor 49 ... Recessed portion 50 ... Screw part 51 ... Embedded box anchor 52 ... Front lid 53 … Insertion hole

Continued front page    (71) Applicant 502092958             Haga Giken Co., Ltd.             785-2 Tanaka, Kawamoto-cho, Osato-gun, Saitama Prefecture (72) Inventor Setsuo Takahisa             5-21 Kotehashidai, Hanamigawa-ku, Chiba City, Chiba Prefecture             Ten (72) Inventor             1-1-10-104 Edagawa, Koto-ku, Tokyo (72) Inventor Hideki Tanaka             Geostar 4 2-3 Shiba, Minato-ku, Tokyo             Within the corporation (72) Inventor Masakazu Yokota             Geostar 4 2-3 Shiba, Minato-ku, Tokyo             Within the corporation (72) Inventor Atsushi Haga             785-2 Tanaka Stock Association, Kawamoto-cho, Osato-gun, Saitama Prefecture             Company Haga Giken Kogyo (72) Inventor Kazuo Tajiri             785-2 Tanaka Stock Association, Kawamoto-cho, Osato-gun, Saitama Prefecture             Company Haga Giken Kogyo F-term (reference) 2D055 BA01 GC04                 3J039 AA03 BB01 CA02 CA17 JA17

Claims (4)

[Claims] 1. A male joint fitting provided on a member on one side to be joined to each other and having a joining rod extending toward a member on the other side, and a joining of the male joint fitting provided on a member on the other side. The male joint fitting has a female joint fitting into which a rod is inserted and which locks the joining rod. The male joint fitting forms a taper portion on the tip side of the joining rod, and an engaging recessed step portion on the lower side thereof. The female fitting is formed of a cylindrical housing having an insertion hole at the center into which the joining rod is inserted, and a ring having a thickness corresponding to the width of the engaging concave step portion in the cylindrical housing. Two semi-circular locking members obtained by dividing the body into two parts and an equilateral triangular plate spring ring body for urging these locking members toward the inner peripheral side are arranged. The outer side is inscribed in the center of the side of the equilateral triangle of the leaf spring ring, and the positive side of the leaf spring ring is fixed to the inner circumference of the cylindrical housing. A joint fitting, which is arranged so that the corners of a triangle come into contact with each other. 2. The fitting according to claim 1, wherein the cylindrical housing comprises a female receiving box that is screwed into the embedded anchor. 3. The joint fitting according to claim 1, wherein the cylindrical housing is formed in an embedded box anchor, and a front lid having an insertion hole at the center for inserting a joining rod is screwed. 4. A male joint fitting provided on a member on one side to be joined to each other and having a joining rod extending toward the member on the other side, and a joining of the male joint fitting provided on a member on the other side. The male joint fitting has a female joint fitting into which a rod is inserted and which locks the joining rod. The male joint fitting forms a taper portion on the tip side of the joining rod, and an engaging recessed step portion on the lower side thereof. The female fitting is formed of a cylindrical housing having an insertion hole at the center into which the joining rod is inserted, and a ring having a thickness corresponding to the width of the engaging concave step portion in the cylindrical housing. Two semicircular locking members obtained by dividing the body in two and triangular leaf spring ring members for urging these locking members toward the inner peripheral side are arranged,
A spacer is interposed inside the two locking members to separate the joint ends from each other to increase the inner diameter, and the outside is inscribed in the triangular side of the leaf spring ring. Further, the joint fitting is arranged such that the triangular corners of the leaf spring ring body are in contact with the inner circumference of the cylindrical housing.