JPS6123523Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint fitting for concrete structures, for example, for connecting concrete structures such as segments.

Recently, water storage tanks have been constructed mainly underground to prepare for earthquakes, fires, etc. For the purpose of shortening the construction period and reducing the space at the construction site, for example, this water tank is made of arc plate-shaped concrete structures that are standardized and produced in advance at a factory, transported to the construction site, and fastened in a prefabricated manner. There is one that is assembled mainly underground to obtain a desired cylindrical water storage tank.

However, the above-described connection between adjacent concrete structures has conventionally been achieved by aligning the end faces of the concrete structures and bolting joint fittings provided on the end faces. The one shown in FIG. 1 is one of the conventional examples of the above-mentioned joint metal fittings, and the joint metal fitting 1 is made of a steel plate bent into a U-shape. 3, the center of the main body part 3 has a bolt hole 4 for bolt fastening, and the flange parts 2, 2 have embedded legs 5, 5, 5, 5, as shown in FIG. Concrete structure 6 as shown
Both the flange parts 2, 2 and the embedded leg 5,
5, 5, and 5 are embedded, and the outer surface of the main body portion 3 is exposed to the end surface of the concrete structure 6.

However, each concrete structure of a water tank (especially in an underground water tank) is subject to various stresses.
Therefore, in the conventional joint fittings as described above, especially when a tensile force is applied between the connected concrete structures, the central main body parts 3, 3 curve and swell outward as shown in FIG. Therefore, there was a risk that a gap would occur between the end faces of both concrete structures that were joined together. In the figure, 7 and 8 are bolts and nuts that fasten the main bodies 3 and 3 of the two joint fittings through their bolt holes 4 and 4, and 9 and 9 are the bolts and nuts that are connected to the rear of the main bodies 3 and 3 for the bolt fastening operation. This is an opening provided in the This is not only extremely inconvenient for a water tank where watertightness is an absolute requirement, but it is also inconvenient because the structure of the water tank is weakened.

The present invention was devised to solve the above-mentioned drawbacks, and includes a ring plate surrounding the circular bolt hole of the main body and reinforcing ribs extending radially from the outer peripheral surface of the ring plate on the inner surface of the main body of the fitting. The present invention aims to provide an extremely strong joint fitting for concrete structures in which the main body part does not bulge by having a structure in which reinforcing members made of the above are welded together.

Hereinafter, one embodiment of the present invention will be described with reference to the attached FIG. 4.

In the figure, reference numeral 10 denotes a main body formed in a rectangular shape, and on an inner surface 10a near both left and right (longitudinal) ends of the main body 10, flange portions 11, 11 are perpendicular to the inner surface 10a and parallel to each other. are provided integrally with the main body portion 10, thereby forming an approximately U-shaped outer shape in cross section.
Further, a circular bolt hole 12 (see FIG. 5) is formed in the center of the main body 10, and a ring plate 13a surrounding the bolt hole 12 is formed on the inner surface 10a of the main body 10. A plurality of pieces (four pieces in the illustrated example) extend radially from the outer peripheral surface of the ring plate 13a.
A steel reinforcing member 1 consisting of reinforcing ribs 13b...
3 are attached by welding, and the tip surfaces of each of the reinforcing ribs 13b... are connected to the inner surfaces 11 of the flange portions 11, 11, as shown in FIG.
They are formed so as to be in surface contact with a and 11a, respectively.

Note that the reference numeral 14 indicates both the flange portions 11, 11.
The figure shows an embedded leg made of reinforcing steel or the like attached by welding one end to the outer surface of the base.

Fig. 5 shows a state in which the fitting A configured as described above is buried in a concrete structure such as a segment, and both flanges 11, 11 and embedded legs 14 are embedded in the concrete structure. , the outer surface of the central body portion 10 is exposed to match the end surface of the concrete structure.

Now, in this way, on the inner surface 10a of the main body part 10,
When a reinforcing member 13 consisting of a ring plate 13a and a plurality of reinforcing ribs 13b is provided, the main body portion 10 is not only directly reinforced by the reinforcing member 13 itself, but also by each reinforcing rib of the reinforcing member 13. 13b
The tip end surface is the inner surface 11 of both flange parts 11, 11.
Since the reinforcing member 13 is in surface contact with a and 11a, it also functions as a supporting member between the flange parts 11 and 11, and therefore allows the flange parts 11 and 11 to approach each other easily. Since the main body portion 10 is not deformed, bulging of the main body portion 10 is reliably prevented. By the way, in the case of such a U-shaped joint fitting, if a tensile force is applied between the concrete structures connected using it, the main body may be removed, for example, as shown in Figure 3. In this case, the part where the tensile force is greatest and the part where the stress is the weakest relative to the tensile force is the center of the main body, that is, around the bolt hole. However, in the joint fitting according to the present invention, the body portion 10 is
The shearing load and bending load acting around the bolt hole 12 are applied to the ring plate 13a and each reinforcing rib 13b.
Since the load is distributed radially by the steel, there is no localized area where the load is applied, providing ideal reinforcement.

On the other hand, when looking at the reinforcing member 13 from the manufacturing point of view, it is possible to easily form a steel plate or the like with an appropriate thickness by punching or other methods, and the reinforcing member 13 can be easily attached to the main body 10 in several ways. It can be installed securely with spot welding.

In the above embodiment, the reinforcing member 13 is attached to the main body 10 and the flange parts 11, 11 formed integrally, but the flange parts 11, 11 may be welded to the main body 10. The joint fitting may be formed by attaching the reinforcing member 13 to a piece that is attached by a method or a piece that is formed by bending a single steel plate into a U-shape.

As described above, according to the present invention, on the inner surface of the main body,
The structure is made by welding reinforcing members consisting of a ring plate that surrounds the circular bolt hole in the main body and reinforcing ribs that extend radially from the outer peripheral surface of the ring plate, so the main body has an extremely strong concrete structure that will not bulge out. It is possible to provide joint fittings for objects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional joint fitting, Fig. 2 is a sectional view showing the fitting shown in Fig. 1 attached to a concrete structure, and Fig. 3 is a perspective view showing a conventional fitting.
Fig. 4 is a partially cutaway perspective view showing an embodiment of the present invention, and Fig. 5 is a concrete structure to which the fitting shown in Fig. 4 is attached. It is a perspective view showing an object. 10... Main body, 10a... Inner surface, 11, 11
...Flange part, 11a, 11a...Inner surface, 12
... Bolt hole, 13 ... Reinforcement member, 13a ... Ring plate, 13b ... Reinforcement rib.

Claims (1)

[Scope of utility model registration request] Both flanges of the fitting, which has a substantially U-shaped cross section, are embedded in the concrete structure, and the outer surface of the main body of the fitting is exposed to the end surface of the concrete structure, so that the main body and other concrete structures are exposed. In a joint fitting having a structure in which the main body parts of the joint fittings similarly embedded in an object are fastened by bolting using circular bolt holes respectively formed in the center parts of these main body parts, A reinforcing member consisting of a ring plate surrounding the circular bolt hole of the main body part and a plurality of reinforcing ribs extending radially from the outer peripheral surface of the ring plate is welded to the inner surface of the part,
A joint fitting for a concrete structure, characterized in that the end surfaces of each of the reinforcing ribs are brought into surface contact with the inner surfaces of both the flange parts.