JPS6131064Y2 - - Google Patents

Description

[Detailed explanation of the invention] Depending on whether the welding when connecting PC concrete concrete plates is performed on the disc or cylindrical part of the joint, it can be roughly divided into disc-type joints and cylindrical joints. . Therefore, when using a cylindrical fitting, it is possible to make the disc metal fitting into a thin steel plate, which has the effect of reducing the total weight of the fitting, and greatly simplifying and rationalizing the processing of the disc metal fitting. It is well known that this happens.

However, since it is structurally impossible to directly attach the PC steel wire to a disc metal fitting made of a thin steel plate or to apply tension to the PC steel wire through the disc metal plate, it is usually not possible to provide assistance. The mechanism uses a PC steel wire suspension fitting, and many ideas have been devised over the years.

In order for a PC steel wire suspension bracket to be a perfect suspension bracket, it must be able to suspend PC steel wire. It must be possible to insert the tightening bolt. The tension applied to the PC steel wire shall not cause distortion or deformation in any part of the fittings, including the suspension fittings. These three points are the minimum required.

As shown in Figs. 1 and 2, the present invention has a screw hole 2 in the upper part into which a tightening bolt 8 is inserted, and a screw hole 2 in the side part.
A suspension fitting 1 is provided with a groove 3 into which the PC steel wire 10 is inserted, and a convex portion 4 formed along the groove 3 to prevent holes from opening and to facilitate the insertion of the PC steel wire 10. As shown in Figure 3, the disc part 5 of the cylindrical joint fitting 8
It is attached to a rigid structure 7 such as by welding on one side of the hole shape 6.

When using a suspension metal fitting that does not have the convex portion 4, the PC steel wire may cause a slipping phenomenon in the final tightening stage and fail to achieve the purpose, such as when tightening a bolt with a broken nut. Even if tension was not applied to the suspension metal fittings, holes or deformation occurred, making it impossible to apply the tension required by JIS standards.

The PC steel wire 10 according to the present invention is attached to a disk metal fitting having a thin steel plate structure by inserting the PC steel wire 10 into the hole 6, sliding it into the groove 3 of the suspension fitting, and suspending it in the screw hole 2, as shown in FIG. This is done by screwing the tightening bolt 8 into the screw hole 2 from the outside of the tightening plate 9 as shown in Fig. This applies tension to 10,
The JIS standard requires a tensile force of several tons per PC steel wire.In contrast, in the present invention, the suspension fitting 1 is attached to the disk metal fitting 5 with a rigid structure 7, so that the disk metal fitting 5 is attached to the groove. 3, the protrusion 4 is drawn to and supported by the disc metal fitting 5 and the clamping plate 9 by the tightening action to prevent holes from opening, and the mounting area due to the rigid structure 7 is also reduced. As a result, the suspension fitting 1 can fully perform its function as a suspension device for the PC steel wire 10.

As mentioned above, the complete attachment of the PC steel wire 10 by the suspension fitting 1 means that no distortion or deformation occurs in the disk metal fitting 5, and the existence value of the disk metal fitting 1 is the same as that of the suspension fitting 1. It is only necessary to determine the mounting position, and as a result, a 0.35mm galvanized iron plate can be used, which is extremely significant for reducing the weight of the fittings.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the slope of the suspension fitting according to the present invention, and Figure 2 is a schematic cross-sectional diagram of Figure 1 A-A. Figure 3 is a schematic diagram showing the state in which the suspension bracket is attached to the back side of the joint bracket, and Figure 4 is a schematic cross-sectional view taken along line B-B in Figure 3.

Claims (1)

[Scope of utility model registration request] The screw hole 2 into which the tightening bolt 8 is inserted is inserted into the upper part.
A groove 3 into which the PC steel wire 10 is inserted is provided on the side, and a convex portion 4 is provided along the groove 3 to prevent opening of the groove 3.
The suspension fitting 1 provided with
Install with rigid structure according to hole 6, PC steel wire 1
The groove portion 3 where the hole-opening action takes place when tension is applied to 0 is configured so that the disk metal fitting 5, the suspension metal fitting 1, and the convex portion 4 are integrated, so that the suspension metal fitting 1 is prevented from deforming. PC concrete anti-PC steel wire suspension system.