JPH0229813B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method for fastening concrete members in close contact with each other, and a fastening fitting used in this method.

<Prior art> Conventional methods for tightening concrete members of this type, for example, as shown in FIGS.
As shown in the figure, if these parts are tied together with poor contact, or if a force is applied to pull them apart after they have been tied together, the parts will separate from each other as shown in the figure, creating a gap between them. There were flaws.

<Problems to be Solved by the Invention> In view of these drawbacks of the conventional art, the present invention automatically brings the concrete members into close contact with each other when joining them together, and also allows the members to be pulled apart and loosened after joining. We are trying to make sure that this does not happen.

<Means for solving the problems> First, one embodiment of the fastening fitting used in the fastening method according to the present invention will be explained with reference to the drawings.
In Figures 1 to 3, 1, 2, 3, and 4 are concrete members, respectively, and 5 and 6 are binding plates that connect these members 1, 2, 3, and 4 to each other. A round hole 7 for a bolt is drilled in the lower part of the bolt, and an elongated hole 8 having a predetermined angle of inclination is bored in the upper part of the bolt. Further, in the figure, 9 is an insert anchor buried at a predetermined position in the concrete members 1, 2, 3, 4, 10 is a tightening bolt screwed into this anchor 9, and 11 is a washer.

Next, to specifically explain examples of the method of the present application, in the method of the present application, in particular, FIG.
As shown in B, C, and D, concrete members 2 and 3
Place the tightening plate 6 and the washer 11 on the plate 6, insert the bolts 10 into the holes 7 and 8 of the plate 6, and tighten them lightly by hand.Next, move the plate 6 to the left by hand, and then press the plate 6 with a hammer. The members 2 and 3 are brought into close contact with each other by hitting and aligning them to the left using a hammer, and by tightening the bolt 10 while drawing the members 2 and 3 together and bringing them into close contact with each other through this forced left-shifting operation. It can be fastened with.

Furthermore, as shown in FIG. 4, the inclination angle α of the elongated holes 8 drilled in the plates 5 and 6 was determined as a result of various experiments15.
It was confirmed that it is functional when within the range of ~25 degrees. In other words, if the inclination angle α is 25 degrees or more, even if the plates 5 and 6 are hit with a hammer, the bolt 10
On the other hand, if the angle is less than 15 degrees, there is little play in the bolt spacing l, which makes it difficult to fit the plates 5 and 6, resulting in poor workability. One thing became clear.

<Embodiment> The round holes 7 of the plates 5 and 6 in the above embodiments can also be formed in the shape of an elongated hole, a square hole, or the like. Further, the above-mentioned washer 11 may be omitted, or a bolt with a washer may be used.

<Effects of the Invention> Since the method according to the present invention and the fastening fittings used therein have the structure as described above, by carrying out this method, concrete members can be drawn to each other and brought into close contact automatically. Furthermore, once the binding is completed, the movement of the plate is restrained by the surface friction between the bolt and the inclined surface of the elongated hole of the binding plate, so even if a separating force acts between the members, they will not be separated from each other. There is no need to worry about being
Therefore, it has the feature that the members can always be brought into close contact with each other in a stable state.

[Brief explanation of drawings]

FIGS. 1 to 4 are explanatory views showing the method and fittings of the present invention, respectively, and FIGS. 5 and 6 are explanatory views of the conventional method. 1, 2, 3 and 4 are concrete members, 5 and 6 are plates, 7 and 8 are holes, 9 is an anchor, and 10 is a bolt.

Claims (1)

[Scope of Claims] 1. When connecting a plurality of concrete members to each other, insert anchors are buried in predetermined positions of these concrete members, and holes and oblong oblong holes with a predetermined shape are installed in predetermined positions. and abutting the plurality of concrete members, and then inserting bolts into the holes of the tightening plates, and temporarily tightening the bolts by screwing the ends of the bolts into the insert anchors, and then tightening the bolts. By forcibly moving the plate in either the left or right direction by a predetermined means, the concrete members are drawn together and brought into close contact with each other, and the concrete members are further tightened by tightening the bolts. Characteristic method of fastening concrete members. 2. A concrete member consisting of a combination of an insert anchor buried in a concrete member, a bolt screwed into the insert anchor, and a fastening plate each having a hole of a predetermined shape and an elongated hole with a predetermined inclination angle. Fastening fittings.