JPH09268539A - Apparatus for joining concrete member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for joining concrete member capable of corresponding to shearing stress positively, and carrying out fitting works readily and positively. SOLUTION: This apparatus includes a male fitting metal piece 4 being provided on the joint surface 2a of one concrete member 2 and having a first hemispherically formed fitting projection 3 for main fitting and a female fitting metal piece 6 having a first hemispherically formed fitting recess part 5 for main fitting capable of being fitted with the first fitting projection 3 of the male fitting metal piece 4 and being provided on the joint surface 2a of the other concrete member 2. Also, the male metal piece 4 has a second substantially linearly extending fitting projection 7 for ancillary fitting formed around the first fitting projection 3 of the male metal piece 4, and the female metal piece 6 has a second substantially linearly extending recessed part 8 for ancillary fitting formed around the first fitting recess part 5 of the female metal piece 6. Then, through fitting operation of the fitting between the first fitting projection 3 and the first fitting recess part 8 and the fitting of the second fitting projection 7, resulting in the positive correspondence to shearing stress, and also the easy and positive performance of fitting works.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided on a joint end face of a concrete member such as a box culvert used when constructing a water channel or a drainage channel, particularly a concrete member which is a thin cross-section member such as a top / bottom plate or a side plate. The present invention relates to a joining device.

[0002]

2. Description of the Related Art Conventionally, as a joining device for this kind of concrete member, for example, the one described in Japanese Utility Model Publication No. 61-43856 has been generally known. Then, as shown in FIG. 4, the joining device described in this publication is provided on the joining surface 20a of one of the concrete members 20 to be connected, and includes a raised portion 21 formed in a truncated cone shape. It has a thin metal plate-made protruding metal fitting 22 and a recess 23 formed in a truncated cone shape into which the raised portion 21 of the protruding metal fitting 22 can be fitted,
The receiving member 24 made of a thin steel plate is provided on the joint surface 20a of the other concrete member 20 to be connected.

[0003]

In the above-described conventional joining device, since the fitting portion is a set of the raised portion and the recessed portion, it is not possible to sufficiently cope with the shear stress applied to the joining portion. It was Further, in the above-mentioned conventional joining device, the raised portion and the recessed portion are formed in a truncated cone shape so that the alignment at the time of fitting can be performed relatively easily. The work of aligning and fitting the concave portion with the concave portion was troublesome.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a concrete member which can surely cope with the shear stress applied to the joining device and which can be fitted easily and surely. It is to provide a joining device.

[0005]

The joining device of the present invention comprises:
A male fitting made of thin steel plate provided on the joining surface of one concrete member to be connected and having a first fitting convex portion for main fitting formed in a hemispherical shape, and a first fitting of this male fitting. A female member made of a thin steel plate having a first fitting concave portion for main fitting, which is formed in a hemispherical shape into which a fitting convex portion can be fitted, and is provided on the joint surface of the other concrete member to be connected It consists of a metal mold. Around the first fitting protrusion of the male fitting, a second fitting protrusion for sub-fitting that extends in a substantially linear shape is formed. In addition, a second fitting concave portion for sub-fitting is formed around the first fitting concave portion of the female metal fitting and extends in a substantially linear shape so that the second fitting convex portion can be fitted therein.

According to such a joining device of the present invention, the male fitting and the female fitting are provided with the first fitting projection and the first fitting recess for the main fitting and the second fitting for the sub fitting. By forming the convex portion and the second fitting concave portion, the fitting portion is formed in two places, and it is possible to sufficiently cope with the shear stress applied to the joint portion. Further, since the first fitting convex portion and the first fitting concave portion for main fitting in the male fitting and the female fitting are formed in a hemispherical shape, the fitting positions of the convex portion and the concave portion are slightly displaced from each other. It is also possible to deal with this by absorbing it by spherical contact, so that the aligning work at the time of fitting can be performed easily and surely.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A concrete member joining apparatus according to the present invention will be described below with reference to the embodiments shown in the drawings.

The joining device 1 (see FIG. 1) provided on the joining end surfaces of both concrete members to be connected is provided on the joining surface 2a of one concrete member 2, and is for hemispherical main fitting. A male fitting 4 made of a thin steel plate having a first fitting convex portion 3 and a first fitting convex portion 3 of the male fitting 4.
And a female fitting 6 made of a thin steel plate, which has a first fitting recess 5 for main fitting formed in a hemispherical shape capable of fitting and which is provided on the joining surface 2a of the other concrete member 2. It consists of In addition, the first fitting protrusion 3 of the male fitting 4
A second fitting convex portion 7 for sub-fitting that extends in a substantially linear shape is formed around the second fitting convex portion, and a second fitting convex portion 7 is formed around the first fitting concave portion 5 in the female metal fitting 6. A second fitting recess 8 for sub-fitting is formed extending in a substantially linear shape so that the part 7 can be fitted.

And, the male fitting 4 in this embodiment is
As shown in FIG. 2, the substrate 9, the first fitting convex portion 3 formed in a hemispherical shape in a substantially central portion of the substrate 9, and the substrate 9 around the first fitting convex portion 3, A second fitting convex portion 7 formed to extend in a substantially linear shape, a mounting screw hole 10 formed in the substrate 9 at an outer position of the second fitting convex portion 7, and both end portions of the substrate 9. In the above, the first fitting convex portion 3 and the anchor piece 11 are provided so as to project in a direction opposite to the projecting direction.

As shown in FIG. 2, the female metal fitting 6 in this embodiment has a base plate 9, a first fitting recess 5 formed in a hemispherical shape at a substantially central portion of the base plate 9, and a first fitting recess 5. A second fitting concave portion 8 formed to extend substantially linearly on the substrate 9 around the one fitting concave portion 5 and an attachment formed on the substrate 9 at a position outside the second fitting concave portion 8. The screw holes 10 and the anchor pieces 11 projecting in the recessed direction of the first fitting recess 5 at both ends of the substrate 9 are provided.

The convex portions 3, convex portions 7, concave portions 5, concave portions 8 and screw holes 10 of the male metal fitting 4 and the female metal fitting 6 are formed by processing the substrate 9 by press molding or the like. There is. The anchor piece 11 is formed by bending a long plate or the like into a substantially U-shape (not shown), and by welding both ends of the U-shaped opening side to the substrate 9, It is attached to 9.

FIG. 3 shows another embodiment of the joining apparatus 1 of the present invention. Here, the male fitting 4 and the female fitting 6
Through holes 12 are formed in the first fitting convex portion 3 and the first fitting concave portion 5, respectively. The through holes 12 of the male fitting 4 and the female fitting 6 are formed so as to communicate with the PC steel rods 13 of the concrete member 2 and the insertion holes 14 such as PC twisted wires and bolts (not shown). There is.

To join both concrete members 2 by using the joining apparatus 1 of the present invention having the above-mentioned structure,
First, as shown in FIG. 2, the joint surfaces 2a of both concrete members 2 to be connected are made to face each other. After that, as shown in FIG. 1, the first fitting projection 3 of the male fitting 4 is fitted into the first fitting recess 5 of the female fitting 6 to join the two concrete members 2. .

At the time of this joining, since the first fitting convex portion 3 and the first fitting concave portion 5 are formed in a hemispherical shape, the fitting position between the convex portion 3 and the concave portion 5 is slightly displaced. Even if it is large, it can be easily and surely aligned. Therefore, the fitting work can be performed easily and reliably in a short time.

At the time of this fitting, the first fitting convex portion 3
And the first fitting recess 5 are fitted together, and the second fitting projection 7 and the second fitting recess 8 are fitted together. Therefore, the shearing stress applied to the joint portion (male metal fitting 4 and female metal fitting 6) can be sufficiently coped with at the two fitting portions.

[0016]

According to the present invention, the first fitting convex portion and the first fitting concave portion for main fitting, the second fitting convex portion and the second fitting convex portion for sub fitting are provided on the male fitting and the female fitting. By forming the two fitting recesses, the fitting parts can be provided in two places. Therefore, it becomes possible to sufficiently cope with the shearing stress applied to the joint portion (male fitting and female fitting). Further, since the first fitting convex portion and the first fitting concave portion for main fitting in the male fitting and the female fitting are formed in a hemispherical shape, the fitting positions of the convex portion and the concave portion are slightly displaced from each other. Can also be absorbed by spherical contact.
Therefore, the centering work during the joining work (fitting work) can be performed easily and surely.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a concrete member joining apparatus of the present invention.

FIG. 2 is a schematic cross-sectional view showing a state before joining in the joining apparatus of the present invention.

FIG. 3 is a schematic cross-sectional view showing another embodiment of the joining device of the present invention.

FIG. 4 is a schematic cross-sectional view showing a conventional joining device.

[Explanation of symbols]

1 ... Joining device, 2 ... Concrete member, 2a ... Joining surface, 3
... first fitting convex portion, 4 ... male fitting, 5 ... first fitting concave portion, 6 ... female fitting, 7 ... second fitting convex portion, 8 ... second fitting concave portion, 9 ... substrate, 10 … Mounting screw holes, 11… Anchor pieces, 12… Through holes, 13… PC steel rods, 14… Insertion holes.

Claims (1)

[Claims] 1. A joining device provided on a joining end face of both concrete members to be connected, which is provided on a joining face of the one concrete member and is a hemispherical first fitting for main fitting. A male fitting made of a thin steel plate having a convex portion, and a first fitting concave portion for main fitting formed in a hemispherical shape in which the first fitting convex portion of this male fitting can be fitted, A female metal fitting made of a thin steel plate provided on the joining surface of the other concrete member, for sub-fitting extending in a substantially linear shape around the first fitting convex portion of the male metal fitting. Of the second fitting convex portion of the female fitting, and the second fitting convex portion of the female fitting which extends in a substantially linear shape around the first fitting concave portion so that the second fitting convex portion can be fitted. A concrete member characterized in that a second fitting concave portion for combination is formed. Joining equipment.