JPS5934690Y2 - Formwork for forming underfloor ventilation holes - Google Patents

Description

[Detailed description of the invention] This invention relates to a formwork for making a ■-shaped ventilation hole on the top of the concrete foundation, and its purpose is to change the height of the concrete foundation so that the upper end of the formwork Even if the distance from the top surface changes or the shape of the top surface of the concrete changes, it is possible to accurately form the bottom of the ventilation hole at a predetermined position on the top of the concrete foundation.
A formwork for forming underfloor ventilation holes that eliminates obstacles protruding from the top end of the concrete formwork for concrete foundations, allows concrete pouring work to be performed easily and safely, and prevents the formwork for forming ventilation holes from shifting. Our goal is to provide the following.

The present invention is a creation of a technical idea that reasonably achieves the above object.

Hereinafter, an embodiment embodying the present invention will be explained with reference to the drawings. In the drawing, the bottom plate 1a is formed in an oblique shape with the outdoor side facing downward, and the left and right side plates 1b and 1c are formed in an inclined shape with the outdoor side widening. The main body of the formwork is shaped like a rectangular box and has an open front and top surface.

Reference numeral 2 denotes a mounting member having an inverted cross-section and fixed between the upper ends of the side plates 1b and lc of the form body 1, whose upper end surface is flush with the upper end of the form body 1, A pair of screw holes 2a are provided in the medium heat section of the vertical side plate.

Reference numeral 3 denotes a hanging plate which is attached to the rear surface of the mounting member 2 so that its position can be adjusted up and down, and the vertical part thereof is provided with the screw hole 2.
A pair of elongated holes 3a are provided vertically and parallel to each other so as to correspond to a, and wing bolts 4 are inserted into the same elongated holes 3a.
It can be tightened and fixed to the mounting member 2 by loosely inserting it into the screw hole 2a and screwing it into the screw hole 2a.

Then, the upper end of the hanging plate 3 is bent at a right angle to the outdoor side to form a horizontal locking part 3b so that it can be locked to the upper end surface of the formwork F for the cloth foundation concrete hole mold. , the formwork constructed as described above is interposed between two pairs of formworks F for cloth foundation concrete holes, as shown in Fig. 2,
The hanging plate 3 is suspended by locking the locking portion 3b to the upper end surface of the formwork F on the outdoor side, and concrete C is poured at the upper end of the formwork body 1.

By the way, the top surface of the concrete foundation C is normally the same as the top of the formwork F, but when pouring a low foundation, the formwork body 1 must be fixed from the top of the formwork F as shown in Figure 2. I have to reduce the distance.

At this time, loosen the butterfly bolts 4 and slide the suspension plate 3 upward to adjust the distance between the locking portion 3b and the upper end surface of the form body 1, so that the upper end surface of the form body 1 is made of cloth foundation concrete. It should match the top surface of C.

Now, in the embodiment of the present invention, a pair of screw holes 2a are provided in the upright part of the mounting member 2, and the upright part of the hanging plate 3 is brought into contact with the upright part, and the pair of screw holes 2a formed in the upright part are brought into contact with the upright part. The butterfly bolt 4 is screwed into the screw hole 2a through the long hole 3a, and the locking part 3b bent at the upper end of the hanging plate 3 is locked to the upper end surface of the formwork F for forming concrete on a cloth foundation. Therefore, even if the height of the cloth foundation concrete changes and the distance between the top end of the formwork and the top surface of the concrete changes, or even if the shape of the top surface of the concrete changes, the upper part of the cloth foundation concrete will remain at the specified position. In addition to making it possible to form ventilation holes accurately, concrete casting work can be performed easily and safely by eliminating obstacles protruding from the upper end of the concrete formwork, and the position of the formwork for forming ventilation holes can be prevented from shifting. It can be prevented.

In the above embodiment, the suspension plate 3 was mounted so as to be vertically adjustable using the reinforcing mounting member 2 installed and fixed between the upper ends of the side plates 1b and 1c of the form body 1. The lower plate 3 is a vertical side plate 1 that connects the side plates 1b and Ic of the formwork body 1.
d, and in this case, the mounting member 2 can be omitted.

In this way, the present invention has a structure in which a plurality of elongated holes are formed vertically and vertically in the vertical part of the hanging plate, which has a locking part that is locked to the upper end of the formwork for the bottom mold. The vertical side plates, which are transparently provided parallel to each other and formed on the main body of the formwork for forming underfloor ventilation holes, are brought into contact with the vertical portions of the hanging plates, and butterfly bolts are screwed into the vertical side plates from the long holes. By fixing the hanging plate to the formwork body, the distance between the top surface of cloth foundation concrete C and the soil edge of cloth foundation concrete molding form F changes, or the shape of the top surface of the concrete changes. In addition, it is possible to form ventilation holes accurately at a predetermined position on the top of the concrete base, and it also eliminates obstacles protruding from the top of the concrete formwork, making concrete pouring work easier and safer. This has the effect of preventing displacement of the formwork for forming ventilation holes.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing the state of use. Form body 1, mounting member 2, hanging plate 3, long hole 3a. Locking part 3b, butterfly bolt 4°

Claims (1)

[Claims for Utility Model Registration] ■ A plurality of elongated holes 3a are formed above and below the vertical part of the hanging plate 3, which has a locking part 3b that is locked to the upper end of the formwork F for fabric foundation concrete molding. The wing bolts 4 are inserted into the elongated holes 3 by abutting the vertical side plates of the hanging plate 3 on the vertical side plates formed in the formwork body 1 for the bottom type of underfloor ventilation holes and parallel to each other.
A formwork for forming an underfloor ventilation hole, characterized in that a hanging plate 3 is fixed to a formwork main body 1 by screwing into a vertical side plate from a. 2. A mounting member 2 is horizontally mounted between the upper ends of the form body 1, and a screw hole 2 is provided for screwing a butterfly bolt 4 into the vertical side plate of the mounting member 2.
The formwork for forming an underfloor ventilation hole according to claim 1 of the registered utility model, characterized in that it takes the form of (a). 3. The formwork for forming an underfloor ventilation hole according to claim 2, wherein the upper surface of the mounting member 2 is flush with the upper end of the formwork body 1.