JPH073097B2 - Building base material and method of manufacturing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a base material used as a waste formwork or the like when constructing a roof of a building or a concrete floor, and a method for manufacturing the same.

[Conventional technology]

As a conventional base material of this type, a deck plate made of a metal plate that constitutes a foundation surface of a concrete floor is well known.

This is done by bending a metal plate such as a steel plate as shown in FIGS. 11 and 12 and reinforcing portions (2 along the longitudinal direction) at a plurality of widthwise positions on the back surface of the face plate portion (1) having a flat surface. ) (Lower rib)
Is formed into an isosceles triangular closed cross section. This deck plate has flat portions (3) formed by crushing a part of the reinforcing portion (2) by press working at both end portions, and connects adjacent deck plates to both side portions. Engaging portions (4) and (5) are formed.

As shown in FIG. 13, the deck plate having such a structure has flat portions (3) formed at both ends supported and fixed on a beam member (6) made of H-shaped steel or the like, and a face plate portion (1). It is used for constructing a concrete floor or the like by placing concrete (8) after arranging reinforcing bars (7) on the top.

In the concrete floor constructed in this manner, the rigidity of the floor surface is secured by the deck plate, so that the thickness of the concrete layer can be reduced accordingly, thus contributing to cost reduction and weight reduction of the building.

[Problems to be Solved by the Invention]

By the way, in such a conventional deck plate, the flat portion (3) is formed by crushing the end side surface of the reinforcing portion (2) having a closed cross section so as to be folded inward. There are problems that the flat portion (3) has irregularities due to the folded portions and the smoothness with respect to the face plate portion (1) is poor.

If such a problem occurs, the deck plate may rise or ramp up in a state where the deck plate is placed on the beam member (6) during the construction of the concrete floor, which may adversely affect the strength of the concrete floor, or the beam member ( There is a problem that part of the concrete flows out from the gap between 6) and goes around to the back side.

In addition, since it is formed by press working, stress strain remains in the flat portion (3), and it is easy to rust due to cracking of the steel plate plating layer due to stress strain or defective formation of the press portion protective layer in the post-treatment. There is also a problem in terms of aesthetics, and as a result, there is the problem that it will look unattractive unless the ceiling is formed from the back side.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a base material such as a deck plate which has a high flatness in a flat portion and which does not impair aesthetics.

[Means for Solving the Problems]

In the present invention in order to achieve the above object, in the building base material in which a reinforcing portion having a closed cross-sectional shape is formed along the longitudinal direction at a plurality of positions in the width direction of the back surface of the face plate, at both ends of the reinforcing portion than face plate ends An opening is provided so as to be located inside. That is, in the present invention, the end of the reinforcing portion is left open without being crushed. On the other hand, in the present invention, a lid member including a lid portion that closes the opening portion and a flange portion that extends from one edge portion of the lid portion toward the face plate end portion is provided. The lid member is fixed to the face plate or the reinforcing part by welding or the like in a state where the lid part is attached to the open part and the flange part is overlapped with the back surface of the end part of the face plate.

[Action]

Since the present invention does not crush the end portion of the reinforcing portion and covers the both ends of the reinforcing portion by covering the open end with the lid member, there is no damage of the surface treatment due to stress strain, and therefore the durability is excellent. With that, a good aesthetic can be obtained.

In addition, since the flange portion provided on the lid member is integrated with the back surface of the end portion of the face plate portion by welding and the like, it is possible to form the back surface at both end portions of the face plate portion smoothly, and therefore at the time of construction. The leakage of concrete and the decrease in floor strength due to the floating of the floor can be reliably prevented.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show a base material according to a first embodiment of the present invention. 1 to 3, (11) is a face plate,
(12) is a reinforcing portion that serves as a lower rib.

The face plate (11) has a rectangular shape formed by bending a steel plate having a thickness of about 0.8 to 1.2 mm, and has a concave shape with a depth corresponding to the approximate thickness at a plurality of positions in the width direction of the back surface. Division (13)
Are formed at equal intervals. These attachment parts (13) are formed along the entire length of the face plate (11) in the longitudinal direction. Engagement portions (14) and (15) folded back inward in the width direction on the back surface side and the front surface side are formed at both left and right ends of the face plate (11), respectively.

The reinforcing portion (12) is formed by bending a steel plate having a thickness similar to that of the face plate (11), and the both side plate portions (17) from both side edges of the bottom plate portion (16) toward the front surface side. Is bent at a right angle, and further, the flange portion (18) is bent at a right angle from both surface side edge portions of both side plate portions (17) toward both outer sides. The outer width between the flange portions (18) is substantially equal to the inner width of the face plate mounting portion (13). The front and rear ends of the reinforcing portion (12) are open portions (19) cut at right angles. The length of the reinforcing portion (12) is larger than that of the face plate (11) so that the open portion (19) is located slightly inward of the front and rear ends of the face plate (13) when attached to the attaching portion (13). Is also set to be short. Further, the reinforcing portion (12) is attached to the face plate (11) in this manner.
Constitutes the lower rib of a rectangular closed section. The reinforcement part (12)
Is fixed to the face plate (11) by spot welding or the like with the flange portion (18) placed on the mounting portion (13).

4 and 5 show the open part (19) of the reinforcing part (12).
The details of the lid member (20) that closes the opening are shown in the lid member (20) from the lid portion (21) corresponding to the opening cross-sectional shape of the opening portion (19) and the surface side edge portion thereof. It is composed of a flange portion (22) bent at a right angle. A side edge portion (23) and a bottom edge portion (24) are bent and formed rearward from both side edge portions and the bottom edge portion of the lid portion (21) by pressing. A recess (25) is simultaneously formed at the center of the end surface of the lid (21) at the time of press working to enhance rigidity. A claw part (26) is bent inward at the rear end of the bottom edge part (24), and the bottom plate part is provided in the reinforcing part (12) so as to correspond to the claw part (26). (16)
An engaging hole (27) that engages with the claw portion (26) is provided near the end portion of the (see FIG. 2).

When the lid member (20) is put on the opening portion (19) of the reinforcing portion (12) with the pawl portion (26) engaged with the engagement hole (27), the side edge portion of the lid member (20). (23) and the bottom edge portion (24) closely contact the side plate portions (17) and the bottom plate portion (16) of the reinforcing portion (12) from the outside to firmly close the open portion (19). In this state, the flange portion (22) extending forward of the lid member (20) is seated on the attachment portion (13) closer to the end than the opening portion (19) to form the same surface as the peripheral portion of the face plate (11). To do.

The flange portion (22) of the lid member (20) is fixed to the attachment portion (13) of the face plate (11) by fixing means such as spot welding or adhesion. The reinforcing plate (12) and the lid member (20) are attached to the face plate (11).
The order of fixing to the face plate (11) is arbitrary. First, attach the reinforcing member (12) to the face plate (11) and then attach the lid member (20), or attach the lid member (20) to the reinforcing portion (12) to integrate them. Attach the converted one to the face plate (11). When the lid member (20) is provided with the claw portion (26) to engage with the engaging hole (27) of the reinforcing portion (12) as in this embodiment, the reinforcing portion ( Since the lid member (20) can be reliably positioned with respect to the 12), workability in mounting the lid member (20) is improved in the latter order. The claw (26) and the engagement hole (27)
Need not be provided, but in that case, it is desirable to weld the lid member (20) and the reinforcing portion (12) to each other at their fitting portions in order to ensure strength and rigidity.

7 to 10 show another embodiment of the base material of the present invention.
The parts corresponding to those in FIGS. 1 to 6 are designated by the same reference numerals.

In the reinforcing part (12) shown in the first embodiment, the open part (19) is cut in the direction perpendicular to the mounting surface by the flange part (18), while the reinforcing part (12) shown in FIG. In the structure shown in FIG. 8, the open part (19) is formed in a manner inclining inward from the front surface side to the bottom surface side. In this case, the lid portion (21) of the lid member (20) is naturally also processed to have an inclined shape corresponding to the inclination. According to such a configuration,
When the cover member (20) is put on the open part (19) of the reinforcing part (12), the workability is improved by simply pushing down from the bottom direction of the reinforcing part (12) toward the face plate (12). To be done.
Further, since the lid portion (21) faces obliquely downward, it is possible to improve the aesthetic appearance by applying a trademark or decorative processing to the recessed portion (25) and the like. The face plate (1
In (1), a large number of ribs (28) are pressed in a region between the attachment portions (13) adjacent to each other in a direction orthogonal to the attachment portions (13) to increase the rigidity thereof.

In the embodiment shown in FIGS. 9 and 10, only the flange portion (18) of the reinforcing portion (12) is extended to the same length as the face plate (11), and the lid member (20) is provided. The flange portion (22) is adapted to be fitted between the extended portions of the flange portions (18). With this configuration, since the flange portion (18) of the reinforcing portion (12) has the same length as the face plate (11), positioning when attaching the reinforcing portion (12) to the face plate (11) becomes easy.

Next, a method of constructing a concrete floor using a base material (deck plate) having the above-described structure will be described. First, the base material is a face plate (11), a reinforcing portion (12) and a lid member (20). Carrying it on to the construction site with the attached, and at the site, the adjacent parts on the left and right are engaged (1
Connect as much as necessary through 4) and (15). Next, both end portions of the face plate (11), that is, the flange portions (22) of the lid member (20).
Place the end of the back side that is on the same plane as the one on the beam member of the building, and then install the reinforcing bars on the face plate (11).
Both ends of 1) are sealed by appropriate means and concrete is poured onto the face plate (11) to be integrated with the reinforcing bar.
The base material is left as a discard form in the building even after the concrete is hardened.

In the above-mentioned embodiment, the flange portion (22) is formed by forming the concave mounting portion (13) on the face plate (11) at the portion overlapping the flange portion (22) of the lid member (20).
The back surface of the face plate (11) and the back surface of the face plate (11) are flush with each other. However, if the thickness of the flange (22) is thin, the required flatness can be ensured without the mounting part (13). You can Further, the base material of the present invention can be applied not only as a deck plate for constructing a concrete floor but also for constructing a concrete roof.

〔The invention's effect〕

As described above, according to the present invention, the end of the reinforcing portion forming the lower rib on the back surface side of the face plate is an open end, and the lid member is attached to the open end to close both ends of the reinforcing portion. Therefore, there is no occurrence of stress strain and surface treatment damage as in the case of press working, and therefore rust is prevented and excellent durability is obtained. In addition, since the reinforcing portion has a good appearance, it is possible to omit the laying of the ceiling material on the back surface side of the base material, thereby eliminating the space above the ceiling and expanding the indoor space and reducing the material cost.

Further, since the present invention has a configuration in which the flange portion provided in the lid member is integrated on the back surface of the end portion of the face plate portion by welding and the like, it is possible to increase the flatness of the back surface of both end portions of the face plate portion, Therefore, there is no lifting of the base material when constructing the concrete floor on the base material, so that it is possible to reliably prevent the leakage of concrete from the edge of the base material to the back side, and to cause the irregularity of the thickness of the concrete layer. It is possible to reliably prevent a decrease in floor strength.

Further, the claw portion provided on the lid member is configured to be engaged with the engaging hole of the reinforcing portion, which facilitates mutual positioning during welding during manufacturing of the base material and improves workability. Occurs.

[Brief description of drawings]

FIG. 1 is an external perspective view of an essential part of the base material of the first embodiment of the present invention viewed from the back side, FIG. 2 is a side sectional view of the same part, and FIG. 3 is a sectional view taken along the line AA of FIG. is there. FIG. 4 is an external perspective view of the lid member according to the embodiment, and FIG. 5 is an external perspective view of the same seen from the back side. FIG. 6 is an external perspective view of an essential part of the base material of the second embodiment of the present invention as seen from the back side, and FIG. 7 is an external perspective view in a state where the reinforcing part and the lid part are separated. FIG. 8 is an external perspective view of an essential part of the base material of the third embodiment of the present invention viewed from the back side, FIG. 9 is a side sectional view of the same essential part, and FIG. Is. 11 and 12 are external perspective views and cross-sectional views of a conventional example, and FIG. 13 is a side view of an example of its applied structure. (11) …… face plate part, (12) …… reinforced part, (13) …… mounting part, (14), (15) …… engagement part, (16) …… bottom plate part,
(17) …… Both sides, (18) …… Flange, (19)…
… Open part, (20) …… Lid member, (21) …… Lid part, (22)
...... Flange part, (23) ...... side edge part, (24) …… bottom edge part, (26) …… claw part, (27) …… engagement hole.

Claims (4)

[Claims] 1. A building base material having a reinforcing portion having a closed cross-sectional shape along the longitudinal direction at a plurality of widthwise positions on the back surface of a face plate, wherein both ends of the reinforcing portion are located inside the end faces of the face plate. A lid member is provided that includes an opening portion and a lid portion that closes the opening portion and a flange portion that extends from one edge portion of the lid portion toward the face plate end portion. The lid portion of the lid member is the opening portion. A base material for construction, characterized in that the flange portion is superposed on the back surface of the end portion of the face plate while being adhered to the base material. 2. The face plate is provided with a concave mounting portion into which the flange portion fits at least at a portion where the flange portion of the lid member overlaps.
Base material for construction described in. 3. The reinforcing portion is provided with an engaging hole located near the open portion, and the lid member is provided with a claw portion which engages with the engaging hole in a state of being attached to the open portion. The base material for construction according to claim 1, wherein the base material is provided so as to project from a part of the portion. 4. A construction base material having a reinforcing portion having a closed cross-sectional shape along the longitudinal direction at a plurality of widthwise positions on the back surface of a face plate, wherein both ends of the reinforcing portion are positioned inside the face plate end portion. A lid member is provided that includes an opening portion and a lid portion that closes the opening portion and a flange portion that extends from one edge portion of the lid portion toward the face plate end portion. The lid portion of the lid member is the opening portion. A method of manufacturing a base material for construction, characterized in that the base plate and the lid member are welded to each other while being adhered to the base plate and the flange portion is superposed on the back surface of the end portion of the base plate.