JPH08218538A - Floor board structure for building structure and ceiling hanging hardware - Google Patents

Abstract

PURPOSE: To reduce the amount of concrete to be used and the weight of a floor board structure by installing a ceiling hanger in a plurality of metal fitting suspension hanger holes vertically bored in the longitudinal direction of a reinforcing rib and installing a fit-in part to a main shaft head and a threaded part to the lower part thereof. CONSTITUTION: A flat part 1 is placed downward while a reinforcing rib is placed upward on a reinforced beam or a wooden form where both ends of the flat part 1 are loaded thereon and fixed therewith by welding or nail driving. Then, concrete is placed. Then, a hanging hole 5 is downwardly installed on a reinforcing rib of a flat deck plate FD and a ceiling hanger 6 is inserted from under a floor board. A fit-in part is fitted in a hanging hole hollow strip so that it may be supported hangingly. The hanging hole 5 is preliminarily installed to the reinforcing rib so as to mount the ceiling hanger 6. After the construction of floor structure, The ceiling hanger 6 is installed. This construction makes it possible to omit work troubles and facilitate a mounting work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floorboard structure of a general building structure, for example, a reinforced concrete floorboard portion, and a ceiling hanging metal fitting which is advantageously used by applying to this floorboard structure. We propose the one that realizes the cost reduction and facilitates the mounting of the ceiling hanging bracket.

[0002]

2. Description of the Related Art Conventionally, in order to construct a floorboard structure of a reinforced concrete building, a space for forming a floorboard is divided by combining forms, and after reinforcing bars are arranged in this space, concrete is placed. The method of removing the formwork after solidification of concrete was adopted. However, this method requires the work of assembling, removing, transporting, organizing a large number of materials such as the formwork and various supports, and applying the release agent to the formwork surface, and thus has the drawback that the construction cost becomes extremely high. It was Therefore, at present, a so-called formwork system, in which such formwork is integrally buried in concrete without being removed, has become widespread. This scrap frame method is a method of mounting a square corrugated deck plate on the upper surface of the steel beam of the structure, but since the upper surface of the deck plate and the upper surface of the steel beam are different in this method,
There is a drawback in that the distance from the upper surface of the steel beam to the concrete surface becomes large, so that the concrete and the finishing material are consumed in large amounts.

On the other hand, in recent years, the actual development of Japanese Utility Model Sho 56-410
A flat deck plate as shown in Japanese Patent No. 12 has been developed and used. This flat deck plate FD has a horizontal flat portion 1 as shown in FIG.
A plurality of reinforcing ribs 2 are bent in parallel on the lower surface side of the, and both ends of the reinforcing ribs 2 are crushed to form a hooking portion 3, and the hooking portion 3 is mounted between the steel beams 4. By fixing and setting the upper surface of the flat deck plate FD and the upper surface of the steel beam 4 on substantially the same plane and reducing the distance from the upper surface of the steel beam 4 to the concrete surface, saving of concrete and finishing material can be achieved. It is something to try.

Further, under the floor board structure, in order to mount a suspended ceiling or a ceiling system fixture on the deck plate via a ceiling suspension fitting, conventionally, as shown in FIG. 2 (a),
After placing concrete C on the deck plate, making a hole in the deck plate and the concrete slab from the downstairs side and driving the anchor plug P to connect the hanging bolt B, or as shown in FIG. 2 (b). , A method in which a hole is drilled in a deck plate before placing concrete, the insert I is fitted and then the concrete C is placed, and then the hanging bolt B is screwed to the insert I exposed on the lower surface, It had been.

Among these conventional techniques, the former method of forming a hole in a concrete slab has a problem of poor workability and safety because the hole is formed after placing concrete. In addition, the latter method of mounting the insert in advance,
In addition to the same problems as described above, there are drawbacks that pre-work before concrete placement is required and that the position cannot be changed after concrete placement.

[0006]

As described above, in the conventional floor board structure, particularly the one using the square corrugated deck plate as the scrap frame, the amount of concrete is large and the weight is large as compared with the general concrete slab only. It is rather disadvantageous. Also, in the case of using a flat deck plate, as long as the reinforcing rib is used downward, molding of the latching part is indispensable, which leads to an increase in the cost of the product. However, there is a drawback that workability is poor. Therefore, in view of such actual situation of the related art, the inventors have earnestly conducted research on the development of a technique capable of compensating for the defect of the conventional floor board structure using the flat deck plate and the defect of the conventional ceiling hanging metal fitting.

That is, an object of the present invention is to propose a technique capable of effectively solving the problems of the floor board structure using the flat deck plate and also of the drawbacks of the ceiling hanging metal fitting. In particular, it is to provide a technology that can reduce the amount of concrete used to realize a lightweight floorboard structure and reduce costs, and at the same time make it easy to install and install ceiling suspension fittings.

[0008]

The present invention proposes the following means as a configuration effective for realizing the above object. That is, the present invention fixes a flat deck plate composed of a flat portion and a plurality of reinforcing ribs projecting upward from the flat portion on a steel beam or the like of a building structure, and concrete is fixed on the plate. And the reinforcing rib has a plurality of metal fitting suspension holes vertically opened along the longitudinal direction at predetermined intervals, and below the flat portion of the suspension hole. A ceiling plate for a building structure, wherein a ceiling hanging metal fitting is detachably attached from below. In the present invention, the reinforcing rib is composed of a vertical strip portion and a hollow strip portion having an inverted triangular cross section, which are continuously formed in the flat portion so as to be separated from each other in the width direction of the flat portion and which are continuously provided at the extending position. In the present invention, the hanging holes vertically provided in the reinforcing ribs are synchronously embossed by a running press in a flat deck plate forming step. In the present invention, the hanging hole,
It is formed by an embossing press that vertically penetrates the reinforcing ribs. Further, the present invention comprises a main shaft, an inverted triangular pyramid-shaped fitting portion formed on the head of the main shaft, and a screwed portion below the main spindle. Provided is a ceiling hanging metal fitting to which a nut is attached. The fitting of the metal fitting to the metal fitting suspension hanging hole provided in the reinforcing rib in the floor plate structure is performed by fitting the fitting portion of the metal fitting head to the hollow ridge portion of the hanging hole and suspending and supporting the fitting. .

[0009]

In the construction of the floorboard structure of the present invention according to the above-mentioned essential structure, the construction is carried out by first placing the flat portion 1 on the lower side and the reinforcing ribs 2 on the steel beam 4 or the wooden formwork. It suffices to simply place both ends of the flat part on it and weld or fix it with nails, and then place concrete. This means that it is not necessary to form the hooking portion 3 found in the conventional plate in the flat deck plate manufacturing process, which has the effect of significantly reducing the flat deck plate manufacturing cost.

Next, in order to attach the ceiling hanging metal fitting to the hanging hole provided downward on the reinforcing rib 2 of the flat deck plate FD, this ceiling hanging metal fitting is simply inserted from the lower side of the floor board into the hanging hole, and 90 ° Rotate and fit the fitting part at the top into the hollow strip of the hanging hole to suspend and support it, and then fasten with a nut. In the present invention, since the reinforcing ribs are provided with the hanging holes for attaching the ceiling hanging metal fittings in advance, the ceiling hanging metal fittings can be mounted after the floor board structure is constructed, which saves the labor for the work.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The floor board structure and ceiling hanging fitting of the present invention will be described below in detail with reference to the drawings. 3 to 7
In the figure, reference numeral FD indicates a flat deck plate including a flat portion 1 and reinforcing ribs 2. In addition,
This flat deck plate FD is obtained by integrally molding one plate (steel plate), and in particular, the reinforcing ribs 2 bent at regular intervals in the width direction of the flat portion 1 are formed by the plate. Vertical strip 2 where
It is composed of a and a hollow strip portion 2b having a substantially inverted triangular cross section, which is connected to the extended position thereof.

Moreover, as shown in FIG. 5, the reinforcing ribs 2 are vertically provided with a plurality of rectangular hole-shaped hanging holes 5 for ceiling hanging fittings at a plurality of intervals in the longitudinal direction thereof. The ceiling hanging metal fitting 6 shown in FIG. 7 can be mounted in the hanging hole 5.

On the other hand, the ceiling hanging metal fitting 6 has an inverted triangular pyramid-shaped fitting portion 6a at the head of the main shaft, and a threaded portion 6b at the lower portion thereof. , A fastening nut 7 for inserting and fixing the ceiling hanging metal fitting 6 in the hanging hole 5 of the flat deck plate FD, and a mounting nut 10 for screwing the field edge 8 and the field edge receiver 9, respectively. To be

Next, a floor board structure constructed by using the flat deck plate FD and the ceiling hanging metal fitting 6 configured as described above will be described. That is, in the floor board structure according to the present invention, the both ends of the flat portion 1 of the flat deck plate FD are mounted on the pair of steel beams 4 or the like with the reinforcing ribs 2 facing upward and fixed by welding or the like. Next, along the reinforcing ribs 2 on the flat deck plate FD, the longitudinal ribs 11 are arranged, and the horizontal ribs 12 are arranged in the direction orthogonal to the reinforcing ribs 2, and concrete C is laid in a constant layer thickness. Build by building.

Next, the ceiling hanging fitting 6 of the floor board structure obtained as described above is attached by inserting the triangular pyramidal fitting portion 6a of the ceiling hanging fitting 6 into the hanging hole 5 from the downstairs side. At the same time, it is rotated by 90 ° at its upper limit to engage with the hollow strip portion 2b having an inverted triangular cross section to support it in a suspended state, and the nut 7 is screwed into the screwed portion 6b of the metal fitting. It is performed by fastening between the fitting portion 6a of the metal fitting and the flat portion 1. Therefore, the ceiling hanging metal fitting 6 according to the present invention can be mounted at any time after construction of the floor board structure, and can be easily removed by loosening the nut 7 if necessary, so that the design change is extremely easy. .

In the present invention, as a method for forming the metal fitting suspension holes 5 on the reinforcing ribs 2, emboss press molding is performed after the reinforcing rib forming step in the flat deck plate forming step. By doing this, a vertical hole is opened. That is, the punch P of the embossing press is pushed upward to the vertical portion 2a rising vertically from the flat portion 1 of the conveyed flat deck plate FD in a superposed state (FIG. 6 (a)), The necessary number of suspension holes 5 (Fig. 6 (b)) are formed by expanding and penetrating them while synchronizing them with the conveying speed. Although the example of FIG. 6 (c) has a rectangular cross section, it may have an elliptical cross section.

[0017]

As described above, according to the floor board structure of the present invention, the amount of concrete to be poured can be small, so that the weight can be reduced and it is not necessary to form the hooking portion on the flat deck plate. Therefore, the molding process is simplified and the product can be provided at low cost. In addition, although it takes time to form the hanging hole, it is not necessary to drill the ceiling hanging metal fittings before and after placing the concrete, so the work process is significantly simplified as a whole, and it is possible to install from the downstairs. Therefore, the ceiling system construction becomes extremely easy. In addition, the ceiling hanging metal fittings themselves are 2
The pieces (inserts and bolts) do not become pieces, and the attachment work is easier. Moreover, with such a ceiling hanging metal fitting, it is possible to freely attach and detach and easily change the design of the ceiling construction.

[Brief description of drawings]

FIG. 1 is a perspective view of a floorboard structure using a conventional flat deck plate.

FIG. 2 is an explanatory view showing a pattern of a conventional ceiling hanging fitting mounting structure.

FIG. 3 is a partially cutaway perspective view of a floorboard structure according to the present invention.

FIG. 4 is a partial cross-sectional view showing a state in which a ceiling system is installed on the floor board structure according to the present invention.

FIG. 5 is a bottom view showing a pattern of arrangement of hanging holes for hanging metal fittings provided on the flat deck plate.

FIG. 6 is a cross-sectional view illustrating details of a hanging hole for hanging a metal fitting.

7A and 7B are a perspective view of a ceiling hanging metal fitting and a front view of a mounting state thereof.

[Explanation of symbols]

 FD Flat deck plate C Concrete 1 Flat part 2 Reinforcing rib 2a Vertical bar 2b Hollow bar 4 Steel beam 5 Suspended hole for metal fitting suspension 6 Ceiling suspension metal fitting 6a Fitting part 6b Threaded part 7 Nut 11 Vertical bar 12 Horizontal bar

Claims (6)

[Claims] 1. A flat deck plate composed of a flat portion and a plurality of reinforcing ribs projecting upward from the flat portion is fixed onto a steel beam or the like of a building structure, and concrete is placed on the plate. After being placed,
In addition, the reinforcing rib has a plurality of hanging holes for hanging metal fittings which are vertically provided at predetermined intervals along the longitudinal direction of the reinforcing rib, and a ceiling hanging metal fitting is attached from below to the flat portion of the hanging hole. A floorboard structure for a building structure characterized by being installed as much as possible. 2. The reinforcing rib is composed of a vertical strip portion and a hollow strip portion having an inverted triangular cross section, which is continuously formed in the flat portion so as to be spaced apart from each other in the width direction of the flat portion and is continuous with the extending strip portion. The floorboard structure for a building structure according to claim 1. 3. The building structure according to claim 1, wherein the hanging hole vertically provided in the reinforcing rib is synchronously embossed by a running press in a flat deck plate forming step. Construction. 4. The structure for a building structure according to claim 3, wherein the hanging hole is formed by an embossing press that vertically penetrates a vertical portion of the reinforcing rib. 5. A main shaft, an inverted triangular pyramid-shaped fitting part formed on the head of the main shaft, and a threaded part below the main shaft, and the threaded part has a metal fixture fixing nut and a suspension nut. Ceiling hanging metal fittings with. 6. The fitting of the fitting to the hanging hole for hanging the fitting according to claim 1 is performed by fitting the fitting portion of the fitting head into a hollow ridge portion of the hanging hole and suspending and supporting the fitting. The ceiling hanging metal fitting according to claim 5, which is characterized by things.