JPS5942449Y2 - Square hole molding formwork structure - Google Patents

Description

[Detailed explanation of the invention] This invention forms a square hole in the reinforced concrete floor of a building to serve as an escape hole for an H-shaped steel column, a hole for installing a toilet, or a hole for carrying in and out materials. This invention relates to a square hole molding frame structure for the purpose of molding hole filling for floor finishing using the same frame.

Generally, during building construction, concrete is poured on the floor of each floor after driving 1F-IHH-shaped steel columns and excavating the surrounding area. It was necessary to form an escape hole in the H-shaped steel support and peel it off.

However, in order to form escape holes in conventional H-shaped steel columns, each column must be framed in a formwork on the concrete floor on site.

For this reason, the number of man-hours involved in constructing the framework was enormous, and as the building became larger, the number of H-shaped steel supports increased, which not only increased the amount of work, but also caused economic problems.

After the pillars are pulled out after the cutting work is completed, the relief holes in the pillars must be filled in to finish the floor, but it is necessary to reframe them for re-burying them, or to form separate burying holes. However, there were problems such as requiring a great deal of labor and expense.

Further, similar work is required when forming a hole for installing a toilet in a building, a hole for carrying materials in and out, etc., and there are problems with the framework and work.

This idea solves the above-mentioned conventional drawbacks and problems.The formwork for forming the desired square hole in advance is constructed so that it can be disassembled and assembled, and can be easily installed at the designated site. To provide a square hole forming form structure that can be used to fill holes for floor finishing according to the same formwork, and can be easily transported by disassembling and folding the formwork.

Hereinafter, embodiments of this invention will be described in detail based on the accompanying drawings.

The attached drawing explains the formwork used to form escape holes in the concrete 1 floor surface to be inserted into the UH section steel column. The opposing side plates 2 and 3 are symmetrically shaped.

Each side plate 2 and 3 has an inward folded part 2ah and 3a at both ends, and an outward folded part 2b at the upper end.
and 3b, and the lower end has an inward folded part 'l
c& and 3c are respectively formed.

Folded portion 2cL- of the lower end of each of the side plates 2 and 3 above.
and 3c are provided with small holes 2d and 3d at appropriate locations.These small holes 2d and 3d are used for fixing the U formwork device 1 to the framework of the floor surface by nailing or the like.

An engagement handle 4 that engages with the adjacent side plates 3 or VJ, 2 is rotatably pivoted on the inner upper side of the pair of opposing side plates 2 or 3 via a bracket 5. .

The above engagement...In the handle 4, one round bar is attached to the side plate 2 or 3.
The arm part 4a is bent at a right angle inward from positions corresponding to both ends of the arm 4a, and has an arm part 4a of a predetermined length, and a bent part 4b at a right angle is formed inward.

The above-mentioned engagement and
- Engagement when the handle 4 is rotated to a horizontal state: The locking part 6 is fixed at a position where the bent part 4b of the handle 4 engages.

This locking portion 6 has a notch 6a into which the bent portion 4b of the handle 4 fits, and is engaged between the locking pieces 6b on both sides of the notch 6a and the side plate 3 or 2. The arm part 4a of the handle 4 is elastically clamped.

In addition, when pouring concrete IJ-1 onto the floor surface that escapes the H-shaped steel support using the formwork device 1, concrete scatters and enters the formwork device 1, causing the engagement and turning of the handle 40 times. A lid 7 that prevents obstruction or other misalignment is formed with a cutout groove 7a that matches the shape of the H-section steel.

A handle 7b is fixed to the upper surface of the lid 7, and is configured to be attached to the H-shaped steel from both sides and to be locked onto the upper surface of the engagement handle 4 in the formwork device 1.

Next, when using the above-mentioned formwork device 1 to form a buried hole to fill the escape hole of the H-shaped steel column after construction is completed, assemble the formwork device 1 on the lower frame 8 as shown in Fig. 4. The lower frame 8 is formed into a dish shape and is divided into two parts using an insertion device or a hinge device so that it can be easily carried. There is.

Since the lower frame 8 has a dish-shaped body with a predetermined depth, there is no possibility that the bottom of the formwork device 1 will fit into it and the formwork device 1 will expand outward even when concrete 17 is poured. Not at all.

When forming a concrete floor surface by forming the escape hole of the formwork apparatus 1fl-IHH section steel column constructed as described above, it is easily fixed to the floor framework by nailing, etc., as described above. Once assembled and concrete pouring is completed, it can be easily disassembled by disengaging the engagement handle 4 and pulling the side plates 2 and 3 inward one after another.

In addition, when using the formwork device 1s- and the bottom frame 8 to form a buried hole to fill the escape hole of the H-shaped steel support section, the formwork device 1 is assembled on the bottom frame 8 as described above, and the inside After forming, concrete is poured into the formwork device 1.
It can be easily disassembled by removing the engagement handle 4 and sequentially pulling down the side plates 2 and 3 outward.

Although the above-mentioned formwork device 1 has been described for forming a predetermined square hole in the floor of a building, if the square hole is square, the facing side plates 2 and 3 may have exactly the same shape; Even if the hole is rectangular, just by changing the length of the side plate,
Since it is easy to manufacture, it can easily accommodate many types of square holes.

Exactly the same formwork device can be used to form square holes for installing toilets, holes for loading and unloading materials, and other holes in enclosed buildings, and a formwork for forming the desired square holes in advance. Since the device can be disassembled and assembled, it has practical effects, such as being able to fold up large quantities and transport and install them at large construction sites.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of this invention, Fig. 2 is a vertical sectional view of the entire opening, Fig. 3 is a perspective view showing an embodiment of the lid according to this invention, and Fig. 4 is a bottom view of the lid according to this invention. It is a perspective view showing an example of a frame. 1... Formwork device, 2.3... Side plate,
2a/3a...Both end folded parts, 2b/3b
...Top end folded part, 2c, 2c...
・Lower end folded part, 2d, 2d...Small hole, 4
......Engagement handle, -4a...Arm part,
4b...Bent part, 5...Bracket, 6...Locking part, 6a...Notch,
6b... Locking piece, T... Lid, 7a...
...Notch groove, 7b...Handle, 8...
・Bottom frame.

Claims (1)

[Scope of utility model registration request] In the reinforced concrete floor of the building, an escape hole for the H-beam support and a square hole for the drawer of materials are formed. The side plate is formed into an inverted trapezoid shape with its upper end widened, and predetermined folded parts are formed at both ends of this side plate, with the lower end facing inward and the upper end facing outward, and on the inside of one of the opposing side plates. The engagement handle is rotatably pivoted, and the formwork device, in which the mooring part of the engagement handle is fixed to the other side plate, can be disassembled and assembled by engaging and disengaging the engagement handle. A square hole forming form structure, characterized in that the bottom part of the form apparatus is assembled on a lower frame formed in a dish shape.