JPH031537Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a formwork holder that interconnects a concrete plate that also serves as a formwork and a formwork when constructing a concrete building.

In recent years, exterior materials such as tiles are laid in advance on a horizontal base plate, and on top of that, many sets of three reinforcing bars bundled in a triangular cross-section via horizontal reinforcing bars are arranged in parallel. One of the reinforcing bars is exposed and concrete is poured, and the precast concrete plate thus made is stood upright with the exterior side facing outward and each of the reinforcing bars running vertically, and placed in a formwork at intervals on the back. These forms are placed side by side, the required reinforcing bars are placed between the formwork and the concrete plate, and then concrete is filled to form an integrated building wall. In this case, the formwork is held by attaching several metal fittings by welding in advance to each of the reinforcing bars arranged in parallel along the back side of the concrete plate, and connecting formwork connecting bolts to these metal fittings to hold the formwork together. The usual method is to tighten and fix it. This welding is usually done after the concrete plate is erected, but it is inconvenient in terms of workability and work procedures, and it is not recommended to attach it when the concrete plate is manufactured. There are disadvantages in that transportation and installation are cumbersome, and it takes time and effort to set the positional relationship with the formwork.

On the other hand, in this invention, after the concrete plate is erected, it can be easily connected to the formwork at the site without welding. As shown in the figure, the entire structure is made up of a locking metal fitting 1 attached to a required reinforcing bar and a formwork connecting bolt 2 for fixing the locking metal fitting 1 to the reinforcing bar.

The fastening metal fitting 1 is made by bending a thick band-like plate and attaching it to the back plate 3.
It is made as a U-shaped metal fitting with side plates 4, 4 arranged side by side on the left and right sides, and a screw hole 5 is provided in the center of the back plate 3, and a screw hole 5 is provided in the center of the back plate 3. Slanted cuts 6, 6, each large enough for the required reinforcing bars to pass through, are provided toward the center from the upper side of one side plate 4 and from the bottom of the other side plate 4, and these inclined cuts The inner parts of 6 and 6 are formed into circumferential inner surfaces of a size that allows the reinforcing bars to fit therein.

The formwork connecting bolt 2 is similar to those commonly used in the past, and has a rectangular cross-section at a suitable place to form a wrench engagement part 7, and the other end serves as a formwork attachment part to attach the formwork to the formwork through a nut. Can be fixed.

This invention has the above-mentioned structure, and in order to use it, the formwork connecting bolts 2 are loosened in advance, and the fastening fittings 1 are attached to the required reinforcing bars a, as shown in FIG. 2A, and the left and right side plates 4, 4 are positioned so as to sandwich the reinforcing bar a, and then rotated 90 degrees clockwise when viewed from the back plate 3 side, the side plates 4 and 4 become horizontal as shown in Figure B, and the reinforcing bar a is placed in each inclined cut 6, It will be located at the back of 6. Next, by rotating and tightening the formwork connecting bolts 2, the fastening fittings 1 are fixed to the reinforcing bars a. In this way, the formwork b can be placed on the other end of the formwork connecting bolt 2 and fixed by tightening with the nut c. In this case, the fastening fitting 1 can be fixed to the reinforcing bar a by holding the formwork connecting bolt 2 with one hand.

As mentioned above, this idea is based on the left and right side plates 4, 4.
It can be easily attached by simply turning half a turn through the inclined notches 6, 6, and in this case, the reinforcing bar a that has entered the inclined notches 6, 6 is guided to the inner part of the inclined notch. Since the escape is prevented, there is less risk of dropping the material during work, and the fact that the cuts are slanted cuts 6 and 6, together with the fact that the cuts do not reach the back plate 3, side plate 4,
The decrease in strength of No. 4 can be minimized.

Furthermore, in this invention, the formwork connecting bolt 2 is used to tighten the reinforcing bar a of the anchoring fitting 1 without using a separate tightening bolt.
The distance between the reinforcing bars a and the formwork b can be reduced. In other words, in this construction method using concrete plates, formwork b is provided through reinforcing bars a that protrude from the plate surface, so the gap between the concrete plate and formwork b increases, making the constructed wall unnecessarily thick. This invention has many advantages, such as being able to make it considerably thinner, although this tends to be the case.

[Brief explanation of the drawing]

Figure 1A is a plan view, Figure B is a side view, Figure 2C is a slope view, Figure 2 shows the installation order, Figure A shows the state in contact with the reinforcing bar, and Figure B shows the state when it has been turned half a turn. FIG. Codes in the figure: 1 is a fitting, 2 is a formwork connecting bolt, 3 is a back plate, 4 is a side plate, 5 is a screw hole, 6 is an inclined cut, 7 is a spanner engagement part, a is a reinforcing bar, b is a Showing formwork.

Claims (1)

[Scope of utility model registration request] A U large enough to insert the required reinforcing bar a into the strip plate.
By bending it into a shape, a fastening fitting 1 is obtained in which side plates 4, 4 are connected to the left and right sides of the back plate 3, and a screw hole 5 is provided in the center of the back plate 3, and one end of the formwork connecting bolt 2 is formed. In addition, a circular hole of a size suitable for the required reinforcing bar a is provided in each of the side plates 4, 4 almost through the center, and these circular holes are cut and expanded to cover the upper side on one side and the lower side on the other side. This architectural formwork holder is formed with inclined cuts 6, 6 that open near the boundary with the back plate 3.