JPH07107298B2 - Deck plate for synthetic floor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deck plate used for a synthetic floor constructed by placing concrete on the deck plate.

[0002]

2. Description of the Related Art Many types of deck plates for synthetic floors of this kind have been proposed. Moreover, a new one is proposed by further improving them. For example, special fair 3
The deck plate for a synthetic floor disclosed in Japanese Laid-Open Patent Publication No. 11341 (Japanese Patent Laid-Open No. 60-173239) is a deck plate for a synthetic floor having an embossed surface on the deck plate, which has been proposed before the invention was made. (Refer to JP-B-42-7178), deck plate for synthetic floor (see JP-B-52-1566) having embossed surface on the deck plate and having a deformed portion for preventing peeling, upper flange of deck plate (hereinafter Deck plate for synthetic floors, which is welded with a shear connector such as round steel to the upper plate portion (Japanese Patent Publication No. 52-40503).
(See Japanese Laid-Open Patent Publication) and the like, and the problems of strength and economy are improved.

That is, this deck plate 11 is shown in FIG.
As shown in, the lower flange (hereinafter referred to as the lower plate-shaped part) 12
At the center of the inclined plate, there is a deformed portion 13 of a lower plate-like portion that extends in the longitudinal direction so as to form a dovetail groove that opens downward, while the inclined web 14 is located above the center of the inclined web 14. In addition, it has a deformed portion 15 of the inclined web bent so as to stand up.

Further, a deck plate for a synthetic floor disclosed in Japanese Utility Model Laid-Open No. 2-9617 is disclosed in the above-mentioned JP-A-60-173239.
In the deck plate for the synthetic floor disclosed in Japanese Patent Publication,
Since no special consideration is given to the overall web structure, when concrete is placed, there is a problem that part of it will bulge outward due to the load of the placed concrete and cause initial change. Moreover, it is pointed out that such deformation causes problems such as separation from the deck plate after concrete curing,
These are improvements made.

This synthetic floor deck plate is shown in FIG.
The deformed portion 13 of the lower plate-shaped portion of the synthetic floor deck plate 11 shown in FIG. 4 is formed into a mushroom shape, while the deformed portion 15 of the inclined web is raised and bent at a position indicated by a dashed line in FIG. Thus, the side length of the upper inclined web portion 15a is set to be a position lower than the center of the inclined web 15 and is significantly longer than the side length of the lower inclined web portion 15b.

[0006]

In both of the above-mentioned synthetic deck deck plates, since the deformed portions 13 and 15 are formed only by the rib structure formed by bending extending in the longitudinal direction, the lower plate-shaped portion 12 and the inclined portion are formed. The strength of the web 14 can be expected, the molding cost can be reduced, and the deformed portion 13 of the lower plate-shaped portion 13
Since there is no embossment on the deck plate surface between the slanted web and the inclined web deforming portion 15, peeling resistance can be expected, but there is a lower slanted web portion 15b, and there are lower slanted web portion 15b and upper slanted web portion 15a. Since the space between the lower inclined web portions 15b is formed by the inclined web deforming portions 15 having a rib structure, the lower plate deforming portion 13 and the lower inclined web portions 15b are formed.
It cannot be said that the concrete holding from the joining point to the upper inclined web portion 15a including the deformed portion 15 of the inclined web is not always sufficient, and accordingly, the concrete retention between the deformed portion 13 of the lower plate-shaped portion and the upper inclined web portion 15a is not sufficient. It cannot be said that the peel resistance of is not always sufficient.

The present invention has been made based on the above circumstances, and an object thereof is to improve the strength at the joint between the lower plate-shaped portion and the inclined web and to ensure the concrete retention in the lower plate-shaped portion. Another object of the present invention is to provide a deck plate for a synthetic floor, which can further improve peeling resistance.

[0008]

In order to achieve the above object, a deck plate for a composite floor according to the present invention has a sectional shape directed downward in the central portion of the lower plate portion in the width direction of the deck plate. With a deformed portion that extends in the longitudinal direction of the deck plate, which has a dovetail shape that opens
A V-shaped groove extending in the longitudinal direction of the deck plate, which is formed by bending the inclined web and the lower plate-shaped portion at an acute angle, is provided at the joint between the lower plate-shaped portion and the inclined web, and the height of the deformed portion (d) But
The height is higher than the height (e) of the V-shaped groove .

A relatively shallow V-shaped groove extending in the longitudinal direction of the deck plate may be provided at the central portion of the upper plate portion in the deck plate width direction.

[0010]

In the central portion of the lower plate-shaped portion in the width direction of the deck plate, there is provided a deformed portion that extends in the longitudinal direction of the deck plate and has a dovetail-shaped cross section that opens downward. At the joint between the section and the inclined web,
Since the V-shaped groove extending in the longitudinal direction of the deck plate, which is formed by bending the inclined web and the lower plate-shaped portion at an acute angle, is provided, the dovetail-shaped deformed portion and the lower portion of the central portion of these lower plate-shaped portions are provided. The V-shaped grooves on both sides of the plate-like portion ensure the retention of the concrete cast on the deck plate, and can further improve the peeling resistance of the lower plate-like portion, and by extension, the inclined web. .

Further, since a V-shaped groove extending in the longitudinal direction of the deck plate formed by bending the inclined web and the lower plate-shaped portion at an acute angle is provided at the joint between the lower plate-shaped portion and the inclined web, the connection is made. The strength of the part is improved, and the peel resistance is improved from this aspect as well. Also, the height (e) of the V-shaped groove is above
V-shaped groove because it is formed lower than the height of the deformed part (d)
Is more difficult to open and the strength is increased more reliably, making it more resistant to peeling.
Get better. Further, the height (e) of the V-shaped groove is the height of the deformed portion.
(D) lower than the thickness
And the plate is caught in the V-shaped groove
It will be easier to carry out construction work etc.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a deck plate for a synthetic floor according to the present invention, and FIG. 2 is a transverse sectional view showing a state in which concrete is placed on the deck plate for a synthetic floor according to the present invention.

In these figures, the deck plate 1 is made of steel strip and consists of an upper plate part 2, a lower plate part 3 and an inclined web 4.

In the present embodiment, the upper plate-shaped portion 2 is provided with a relatively shallow V-shaped groove 5 extending in the longitudinal direction in the central portion thereof to enhance the strength (bending rigidity) of the upper plate-shaped portion 2.

The lower plate-shaped portion 3 is provided at its central portion with a deformed portion 6 which extends in the longitudinal direction of the deck plate and has a dovetail-shaped cross-section opening downward. The concrete 7 engages with the inclined portion 6a which is formed at an acute angle with respect to the lower plate-shaped portion 3 and which projects laterally from the deformed portion 6.

A V-shaped groove 8 extending in the longitudinal direction of the deck plate, which is formed by bending the lower plate-shaped portion 3 and the inclined web 4 at an acute angle, is formed at the joint between the lower plate-shaped portion 3 and the inclined web 4 .
The height (e) is lower than the height (d) of the deforming portion 6
(See FIG. 3) . The concrete 7 also engages with the V-shaped groove 8. Therefore, the V-shaped groove 8 and the slanted portion 6a of the deforming portion 6 firmly hold the concrete 7, whereby the lower plate-shaped portion 3 of the concrete 7 is held.
The resistance to peeling from is improved. Further, the deforming portion 6 enhances the strength (bending rigidity) of the lower plate-shaped portion 3, and the V-shaped groove 8 strengthens the joint portion (bending rigidity) of the lower plate-shaped portion 3 and the inclined web 4.
As the concrete 7 is placed, the deformation is small even when the concrete 7 is placed.
The peel resistance can be further improved. Moreover, the height of the V-shaped groove 8
The height (e) is lower than the height (d) of the deformed portion 6.
The V-shaped groove 8 is hard to open and the strength is increased more reliably.
It

The deck plate 1 is composed of two ridges composed of an upper plate portion 2 and an inclined web 4. And
Both sides of the deck plate 1 are lower plate-shaped portions 3, one end of which is formed into a hook-shaped bent portion 9 and the other end of which is formed into a Z-shaped bent portion 10.

Deck plate 1 constructed as described above
Is continuously manufactured from steel strip by roll forming.

An example of dimensions of the deck plate formed as described above is shown below in correspondence with the symbols shown in FIG.

W: 600 mm H: 50 mm A: 170 mm B: 130 mm D: 125 mm E: 175 mm a: 25 mm b: 8 mm c: 30 mm d: 16 mm e: 10 mm α: 56 ° β: 65 °

The dimensions of the deformed portion 6 and the V-shaped groove 8 are determined in consideration of the improvement of the strength of the deck plate 1 due to the rib structure and the peeling resistance of the concrete 7 from the surface of the deck plate 1. There is. The preferred values for these dimensions are as follows: 25 mm ≤ c ≤ 40 mm 10 mm ≤ d ≤ 20 mm 8 mm ≤ e ≤ 17 mm 40 ° ≤ α ≤ 70 ° 35 ° ≤ β ≤ 70 ° And, in this case, from the width D of the lower plate-shaped portion 3 to the lower surface opening width of the deformed portion 6 The ratio x / y of the half y of the width obtained by subtracting x and the horizontal interval length x between the protrusions at the positions of dimension d and dimension e is 0.6.
It is desirable to set it within the range of ~ 0.9.

In the above embodiment, the V-shaped groove 5 is provided in the upper plate-shaped portion 2, but the present invention is not limited to this, and the V-shaped groove 5 is omitted. You may. Further, although the example in which the number of peaks of the deck plate 1 is 2 has been described, the number of peaks may be 3 or more. Also, the V-shaped groove 5
Although an example in which the inclined web 4 side is directly joined to the inclined web 4 has been described, the inclined horizontal web 4 may be joined to the inclined web 4 by providing a rear horizontal surface of the V-shaped groove 5 to form a substantially Z shape.

[0023]

As described above, the composite floor deck plate according to the present invention has the dovetail-shaped deformed portion in the central portion of the lower plate-like portion and the V-shaped grooves on both sides of the lower plate-like portion. Due to
It secures the retention of concrete cast on the deck plate and has excellent resistance to peeling on the lower plate-shaped part, and further on the inclined web.

Since the lower plate-shaped portion and the inclined web are joined to each other, a V-shaped groove extending in the longitudinal direction of the deck plate is formed by bending the inclined web and the lower plate-shaped portion at an acute angle. It excels in strength at the joint and, in turn, improves peel resistance. In addition, the height (e) of the V-shaped groove 8 is
Since it is formed lower than the height (d) of 6, the V-shaped groove 8
It is hard to open and the strength is increased more reliably, making it more resistant to peeling.
Improve

[Brief description of drawings]

FIG. 1 is a perspective view of a synthetic floor deck plate according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which concrete is placed on a deck plate for a synthetic floor according to the present invention.

FIG. 3 is an explanatory view of symbols showing dimensions of a synthetic floor deck plate according to the present invention.

FIG. 4 is an enlarged explanatory view of a main part of a conventional synthetic floor deck plate.

[Explanation of symbols]

1: Deck plate 2: Upper plate part
3: Lower plate-shaped part 4: Inclined web 5, 8: V-shaped groove
6: Deformed part 6a: Sloped part 7: Concrete
9, 10: Bent part

Claims (2)

[Claims] 1. A deck plate having a trapezoidal groove continuously and alternately formed by an upper plate-shaped portion, a lower plate-shaped portion, and an inclined web, wherein the lower plate-shaped portion has a central portion in the deck plate width direction. The deck plate has a deformed portion that extends in the longitudinal direction and has a groove shape with a cross-section opening downward, and the inclined web and the lower plate-shaped portion form an acute angle at the joint between the lower plate-shaped portion and the inclined web. It has a V-shaped groove extending in the longitudinal direction of the deck plate, which is formed by bending it in such a manner that the height (d) of the deformed portion is the height (e) of the V-shaped groove.
Deck plate for synthetic floors characterized by being formed higher . 2. The deck plate for a synthetic floor according to claim 1, wherein a relatively shallow V-shaped groove extending in the longitudinal direction of the deck plate is provided at a central portion of the upper plate portion in the deck plate width direction.