JP3044426B2 - Pre-adhesion method of formwork around opening of slab opening and closing part and metal fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening peripheral formwork for supporting an opening metal fitting for forming a slab opening / closing portion serving as a floor inspection opening and a renovation opening in a slab, and a method of pretending an opening metal fitting using the same. It is about.

[0002]

2. Description of the Related Art Generally, slabs are provided with floor inspection openings and renovation openings .
That if there is a need to provide a slab-off portion, the use of the opening hardware consisting of flaps and the opening frame hardware recently, the formation of the slab, the steel flat type deck as a substitute for plywood formwork Since a slab discarded formwork has come to be used, in the case of a slab utilizing this slab discarded formwork, the slab opening / closing portion is formed as follows.

First, as shown in FIG. 6, a peripheral form (plywood) b slightly larger than an actual slab opening / closing portion is arranged at a predetermined position on a flat type deck a, and then concrete c is cast. . In the figure, d is a mounting base reinforcing bar,
Before the concrete c is cast, it is arranged on all sides so as to penetrate the peripheral form b. Then, after casting the concrete, the peripheral form b is removed, and as shown in FIG. 7, the opening frame hardware f of the opening hardware g including the opening lid e and the opening frame hardware f is attached to the mounting base reinforcing bar d. Attach. The opening frame hardware f is a frame shape having a side cross-sectional shape of substantially L-shape and a lid receiving surface h on the inner peripheral side, and a plurality of substantially L-shaped mounting bases arranged on the outer peripheral side thereof. It is fixed to the mounting base reinforcing bar d via the hardware i (see FIGS. 10 and 11).

[0004] Thereafter, as shown in FIG.
A mold j is arranged from the flat type deck a along the inner periphery of the mold, and concrete k is cast on the outer periphery of the mold j.

FIG. 9 shows a state in which the mold j is removed, a predetermined portion of the flat type deck a is cut and opened, and an opening cover e is attached after the opening (the flat type deck a is welded and cut). In order to do this, an opening lid is retrofitted). As shown in FIGS. 10 (A) and 10 (B), the slab opening / closing portion A which serves as a floor inspection port or a new port can be obtained by arranging the opening lid e on the opening frame hardware f. FIG. 11 shows a part of the slab opening / closing portion A. In the drawing, 1 is an opening lid back plate, m is an opening lid fitting and constitutes an opening lid e, and a mortar n for a lid is provided therein. Is filled.

[0006]

However, in the above-mentioned construction procedure, a long time elapses after the after-cast concrete is struck and the metal fittings are completely attached, and there is a problem in terms of safety in terms of fitting. Remains. In addition, since the work must be performed intermittently until the metal opening is properly attached, the productivity at the site is not good, and the post-cast concrete k is cast around the slab opening / closing part.
Irregularities are likely to occur in the joint between the concrete and the concrete c,
There is a problem that the appearance around the opening / closing part is inferior.

In view of the above circumstances, the present invention precedes a concrete (slab) by casting a concrete (slab) using a decorative driving form as a support for the opening, and removes the conventional form or removes the concrete. It is an object of the present invention to form a slab opening / closing section without performing post-processing or the like, and to continuously and efficiently perform construction of the slab opening / closing section.

[0008]

The present invention SUMMARY OF] has been made in consideration of the problems described above, the floor access doors and reformed port slab and
An opening peripheral formwork that supports an opening hardware consisting of an opening lid and an opening frame hardware for forming a slab opening / closing part,
A frame-shaped lower decorative implantation mold mounting in an opening opened to the slab discarded formwork overlap over the upper rim of the lower decorative implantation formwork, frame-like the opening frame hardware of the opening hardware to the upper mounted And an upper makeup driving form, wherein the upper makeup driving form is attached to the lower makeup driving form so as to be vertically adjustable. An object of the present invention is to solve the above-mentioned problems by providing a mold.

According to another aspect of the present invention, an opening metal member including an opening lid and an opening frame metal member for forming a slab opening / closing portion serving as a slab floor inspection port or a remodeling port is disposed on a slab disposal mold. strikes, opened an opening in the slab discarded formwork, after the stretchable opening peripheral formwork in the height direction in a frame shape corresponding to the opening of the opening hardware, attached to the opening of the slab discarded formwork, said The opening metal fitting of the opening metal fitting is mounted on the upper part of the opening metal forming form, and the opening metal fitting is positioned at a predetermined height according to the slab thickness by adjusting the height of the opening metal forming form. This is a construction method, and the above problem is solved by providing this pre-applied construction method.

[0010]

According to the first aspect of the present invention, as described above, the opening peripheral form includes the lower decorative form forming form attached to the opening of the slab disposal form and the upper decorative form forming form which can be moved up and down with respect to this. While being supported by the opening peripheral form, the opening metal is placed at a predetermined height above the opening of the previously opened slab disposal form .

In the second aspect of the present invention, before the concrete is poured into the slab discarding formwork , the metal opening is pre-attached to the opening of the slab discarding form via the opening peripheral formwork. Accordingly, when the concrete is poured into the slab disposal form , the concrete is filled around the form around the opening and the metal fitting.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on one embodiment shown in FIGS. In addition, the same reference numerals are given to portions having the same configuration as the conventional example, and the description thereof will be omitted. FIGS. 1 to 3 show a state in which an opening metal mold g is pre-attached using the opening peripheral formwork 1 and then concrete c is cast. FIGS. 4 and 5 show the formed slab opening / closing portion A. . The opening peripheral form 1 is a slab disposal form as shown in FIG.
A flat type deck a, which is installed in advance in an opening B, and has a substantially L-shaped cross-sectional side so that an upright wall portion 2a can be obtained along the inner peripheral edge of the opening B. The lower makeup driving form 2 and the side cross-sectional shape are substantially provided so as to be provided in a frame shape corresponding to the opening B in the same manner as the lower makeup driving form 2 so that the hanging wall portion 3a is obtained along the inner peripheral edge. And L-shaped upper decorative driving formwork 3.

As shown in FIG. 5, the lower decorative driving formwork 2 is arranged so as to be inserted from below into an opening B formed by cutting a predetermined portion of the flat type deck a, and the bone of the flat type deck a is formed. Packing 2b, decorative form fixing bolt 2c positioned so as to avoid the material,
And it is fixed using the metal fitting 2d located on the upper surface side. The fixing to the flat type deck a is not limited to this configuration.

As shown in FIG. 5, the hanging wall portion 3a of the upper makeup driving formwork 3 is connected to the lower makeup driving formwork 2 as shown in FIG.
Are slidably overlapped on the upper inner peripheral surface of the upright wall portion 2a in the up-down direction, and both are connected by a thickness adjustment fixing screw 4. Although not shown, the thickness adjustment fixing screw 4 is inserted through a vertically long hole provided in at least one of the upright wall portion 2a and the hanging wall portion 3a. The structure is such that the height of the upper makeup driving formwork 3 with respect to the formwork 2 can be adjusted. This is for positioning the opening hardware at a predetermined height according to the slab thickness as described later.

After the opening peripheral form 1 having the above structure is mounted on the opening B, the opening frame fitting f of the opening fitting g is fixed to the flat plate portion 3b of the upper decorative driving form by means of welding or the like. , Corresponding to the opening B via the opening peripheral form 1 (see FIG. 2). At this time, the opening peripheral formwork 1 is adjusted so that the height of the metal opening g according to the slab thickness is obtained.

After the metal fitting g is attached in this way, the slab opening / closing portion A is formed by placing concrete c as shown in FIG. In this embodiment, the slab discarded formwork is described as a flat type deck,
The present invention is not limited to this flat type deck, but can be applied to various corrugated iron plates (for example, keystone plates).

[0017]

The opening peripheral form of the first invention described above eliminates the need for a conventional peripheral form for damping concrete and a form for damping post-cast concrete when a conventional slab is cast. An underlaying reinforcing bar for supporting the opening hardware is not required, and the height of the opening hardware can be adjusted with the opening peripheral form, so that the mounting of the opening hardware is extremely simple. Also, since the opening edge of the slab disposal formwork (flat type deck etc.) is covered,
When a person enters or exits from the slab opening / closing section during a construction period or the like, injuries such as cuts can be prevented.

Then, according to the pre-adjustment method of the second invention,
It is not necessary to install the peripheral formwork (during concrete slab casting) or the formwork (during concrete casting around the opening hardware), and to lay concrete around the opening metalwork, which has been done conventionally. The process can be omitted when forming the semiconductor device, labor can be saved, and the total cost can be reduced. In addition, floor finishing can be done at once,
It is easy to ensure the accuracy of the floor finish. Further, the opening can be completely cured by the main cover, and an accident such as a fall or a fall can be prevented, which is advantageous in terms of safety.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state where an embodiment of an opening peripheral formwork according to the present invention is attached.

FIG. 2 is an explanatory view showing a state in which an opening hardware is attached to an opening peripheral formwork.

FIG. 3 is an explanatory view showing a state in which slab concrete is cast.

FIGS. 4A and 4B are explanatory views showing a slab opening / closing portion according to the method of the present invention, wherein FIG. 4A shows a plan view and FIG.

FIG. 5 is an explanatory diagram showing an enlarged part of a slab opening / closing section.

FIG. 6 is an explanatory view showing a state in which peripheral formwork is arranged and slab concrete is cast in a conventional example.

FIG. 7 is an explanatory view showing a state in which a metal opening is mounted in a conventional example.

FIG. 8 is an explanatory view showing a state in which concrete is cast on the outer peripheral side of the opening frame fitting in the conventional example.

FIG. 9 is an explanatory view showing a state where a predetermined portion of a flat type deck is opened in a conventional example.

10A and 10B are explanatory views showing a slab opening / closing portion in a conventional example, where FIG. 10A shows a plan view and FIG. 10B shows a cross section.

FIG. 11 is an explanatory diagram showing an enlarged part of a slab opening in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Opening peripheral formwork 2 ... Lower makeup driving formwork 2a ... Standing wall part 3 ... Upper makeup driving formwork 3a ... Hanging wall part a ... Flat type deck e ... Opening lid f ... Opening frame hardware g ... Opening hardware A ... Slab opening / closing part B: Opening

Claims (2)

(57) [Claims] 1. An opening peripheral formwork for supporting an opening hardware comprising an opening lid and an opening frame hardware for forming a slab opening / closing portion serving as a floor inspection port or a renovation port of a slab , A frame-shaped lower decorative driving form attached to the opening formed in the slab discarded form; a frame-shaped upper part on which an opening frame metal of the opening metal fitting is attached to an upper portion of the lower decorative driving form which overlaps over an upper peripheral edge of the lower decorative driving form; And a decorative driving form, wherein the upper decorative driving form is attached to the lower decorative driving form so as to be vertically adjustable. frame. 2. A method of disposing an opening metal member comprising an opening lid and an opening frame metal member for forming a slab opening / closing portion serving as a floor inspection port or a remodeling port of a slab on a slab disposal mold. the opened an opening in the slab discarded formwork, after the stretchable opening peripheral formwork in the height direction in a frame shape corresponding to the opening of the opening hardware, attached to the opening of the slab discarded formwork, said opening A method of pre-adhering an opening metal fitting, wherein an opening metal fitting of the opening metal fitting is attached to an upper portion of a peripheral formwork, and the opening metal fitting is positioned at a predetermined height according to a slab thickness by adjusting the height of the opening peripheral formwork. .