JPH07238616A - Deck plate for slab form - Google Patents

Abstract

PURPOSE:To fill a part of slab concrete in an upper space so as to eliminate a possibility of falling-off by integrally molding a rib for reinforcement which has a space in an upper section at a proper interval in the lateral direction over the whole length except both ends of a deck plate in the longitudinal direction. CONSTITUTION:A rib for reinforcement 2 which is made by bending a deck plate 1 protrudes on the lower side of the deck plate 1 by molding it integrally. It is formed at positions which are obtained by dividing the deck plate 1 at roughly equal interval from a side at one end to a side at the other end in the lateral direction over the whole length except both ends of the deck plate 1 in the longitudinal direction. On this occasion, trapezoid upper spaces 3 which are wider than the width of an opening 3a at an upper end are opened on the upper side of the deck plate 1 of the rib for reinforcement 2. Then, bottoms of the upper spaces 3 are made into blocked sections 4, and triangular rib main body sections 5 are ranged below them. Consequently, the deck plate 1 and slab concrete are connected surely to prevent falling-off of the plate 1. Also, since concrete is filled only in the upper spaces 3, it is possible to lessen the amount of concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a slab form plate,
The present invention relates to a deck plate used in place of plywood.

[0002]

2. Description of the Related Art As a deck plate of this type, as shown in FIG. 7, a reinforcing rib 22 having a triangular cross section, which protrudes to the lower side of the deck plate 21, is integrally formed by bending the deck plate 21, and is continuously formed. Those having a flat surface are known. Such a deck plate 21 is used as a slab formwork instead of plywood, but as shown in FIG.
Since the surface side in contact with 3 is flat and almost no bonding force with the slab concrete 23 is generated, in the case of a reinforced concrete structure in which both ends of the deck plate 21 cannot be welded and fixed to the steel frame for beams, the ends of the deck plate 21 for beams By placing the deck plate end edge 21a on the upper end of the form 24, projecting the deck plate end edge 21a into the beam form 24, and biting the deck plate end edge 21a into the beam part concrete 25, The deck plate 21 is prevented from dropping when the mold 24 is dismantled and removed.

[0003]

In such a conventional structure, since the deck plate end edge 21a that bites into the beam concrete 25 reduces the strength of the beam portion, the beam portion of the deck plate end edge 21a is reduced. Concrete 25
It is required that the amount of bite into the inside should be suppressed to 10 mm or less. However, since it is usual to dismantle and remove the beam form 24 before the concrete has the desired strength, if the bite amount of the deck plate edge 21a into the beam concrete 25 is reduced, the beam form 24 is reduced. 24 Not only does the risk of the deck plate 21 falling off during dismantling and removal increase, but even if the deck plate is prevented from falling off, suspension of piping etc. on the reinforcing ribs 22 of the deck plate 21 as shown in FIG. Bracket 29
If the load is attempted to be hung, there is a problem that the deck plate 21 may drop from the slab concrete 23 and fall under the load due to the load, as indicated by an imaginary line in FIG.

Also, one end side in the width direction of the deck plate 21 is bent downward in an L-shape so as to be bent for connection 2.
6 to form the connecting bent portion 26 on the deck plate 2
Reinforcing rib 22 on the other end side in the width direction of 1
It is configured to be fitted in the 2a to connect the deck plate 21 in the width direction.
A gap is likely to be formed in the mating portion 22a at the upper end, and there is a risk that slag or water will enter the reinforcing rib 22. In order to discharge it, as shown in FIG. There is also a problem that the drain hole 28 needs to be processed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, the features of which will be described with reference numerals of embodiments described later in parentheses. Shown is a deck plate (1) for a slab formwork with a reinforcing rib (2) projecting downward, the reinforcing rib (2)
Are integrally formed by bending the deck plate (1) over substantially the entire length of the deck plate (1) except for both ends in the longitudinal direction and at appropriate intervals in the width direction of the deck plate (1). Deck plate (1) The upper space (3) that opens to the upper side, the closing part (4) that forms the bottom of this upper space (3), and the deck plate (1) that is connected to the lower side of this closing part (4). ) Reinforcing rib body extending in the width direction (5)
And the upper space (3) is wider than the upper end opening (3a) on the bottom side.

Preferably, the deck plate (1) has a connecting bent portion (6) in which one end side in the width direction is bent downward, and the connecting bent portion (6) is a deck plate (1). When 1) are arranged side by side in the width direction, they have such a height that they can be fitted only into the upper space (3) of the reinforcing rib (2) on the other side in the width direction of the adjacent deck plate (1).

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A deck plate for a slab formwork according to an embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 is a deck plate for a slab formwork, and a plurality of reinforcing ribs 2 project below the flat surface thereof, and the reinforcing ribs 2 form the deck plate 1. It is integrally formed by bending the constituent plates. Also, these reinforcing ribs 2
Are formed over substantially the entire length of the deck plate 1 excluding both ends in the longitudinal direction, and are divided at substantially equal intervals from one side edge in the width direction of the deck plate 1 toward the other edge side.

Further, each of the reinforcing ribs 2 has a trapezoidal upper space 3 which is open to the upper side of the deck plate 1 and has a width on the bottom side larger than the width of the upper end opening 3a in the cross-sectional shape, and the upper portion thereof. Block 4 that forms the bottom of the space
And the deck plate 1 connected to the lower side of the closing portion 4
And a reinforcing rib main body 5 having a triangular shape that spreads in the width direction. Further, in the upper space 3 having a trapezoidal cross section, only one side surface thereof is formed to be inclined obliquely downward and outward, and the other side surface thereof is formed vertically.

On one side of the deck plate 1 in the width direction,
A connecting bent portion 6 formed by bending the plate downward in an L shape is formed, and as shown by an imaginary line in FIG. 1, adjacent decks are arranged when the deck plates 1 are arranged in parallel in the width direction. The reinforcing rib 2 on the other side of the plate 1 in the width direction is fitted into the upper space 3 so as to overlap the vertical side surface of the upper space 3. The height H of the connecting bent portion 6 is set to be smaller than the depth D of the upper space 3 so that the tip thereof does not penetrate the closed portion 4. Further, in the deck plate 1, the outer portion 7 is formed lower than the reinforcing rib 2 near the other end side by the plate thickness of the plate, and even if one end side part of the adjacent deck plate 1 is overlapped, it becomes flush. Is formed.

In the above structure, when the slab is formed,
As shown in FIG. 2, both end portions of the deck plate 1 in the longitudinal direction are placed on the upper end of a beam form frame 11 for forming the beam portion 10, and the end edges are taken into consideration to make the beam form frame. Frame 11
Leave a few millimeters protruding inside. In addition, the connecting bent portion 6 formed on one end side of the deck plate 1 is fitted into and engaged with the upper space 3 of the reinforcing rib 2 of the adjacent deck plate 1, so that the adjacent deck plates 1 in the width direction are joined. Are connected with no gaps. that time,
The connecting bent portion 6 is fitted only in the upper space 3,
Since the bottom part of the is closed, no slag or the like will enter the reinforcing rib main body 5.

In this state, concrete is cast in the beam form 11 and on the deck plate 1 by an appropriate thickness. At this time, since the deck plate 1 has the bending strength and rigidity required mainly in the reinforcing rib main body 5 and additionally in the upper space 3 and the closing portion 4, the columns and the like are erected from below. Even if it is not supported, the weight of the slab concrete 8 can be supported and transmitted to the beam form frame 11, and the slab form plate having good workability can be functioned. Further, a part of the slab concrete 8 is also filled in the upper space 3, but the capacity of the upper space 3 is small, so that the increase in the amount of concrete is small.

After that, when the concrete is hardened to some extent, even if the beam formwork 11 is dismantled and removed before the desired strength is obtained, as shown in FIG. Since the space 3 is partially filled with the slab concrete 8 and hardened, the deck plate 1 and the slab concrete 8 are securely connected, and the upper space 3 has a cross-sectional shape expanding downward. Since a larger coupling force can be obtained because of the presence of the edge of the deck plate 1 in the beam portion 10,
In some cases, there is no risk of the deck plate 1 falling off even if there is almost no bite.

Furthermore, after the slab concrete 8 has a desired strength, a suspending metal 9 for suspending pipes or the like is temporarily attached to the reinforcing rib main body portion 5 of the deck plate 1 as shown by an imaginary line in FIG. Also, it is possible to completely eliminate the risk that the deck plate 1 will fall due to the load.

The deck plate for the slab formwork of the present invention comprises:
The present invention is not limited to the configuration of the embodiment shown in the above embodiment, but can be configured in various modes.

For example, in the above embodiment, only one side surface of the upper space 3 is inclined and the other side surface is vertical, and the connecting bent portion 6 is simply bent in an L shape to the other vertical side surface. An example of polymerization is shown, but as shown in FIG.
The cross-sectional shape of the upper space 3 can be arbitrarily changed such that both side surfaces of the upper space 3 are inclined obliquely downward and outward. In the example of FIG. 5, the bent portion 6 for connection is bent and formed in a substantially S-shape along the other side surface of the upper space.

Further, the cross-sectional shape of the reinforcing rib body 5 is also
In the above embodiment, a triangular cross-section is illustrated, but as shown in FIG. 6, for example, an L-shape having a vertical web portion 15a and a flange portion 15b extending horizontally from the lower end thereof,
Alternatively, it can be formed into an inverted T shape, etc.
It can have any cross-sectional shape.

[0018]

The deck plate for a slab formwork of the present invention can be carried out as described above, and the upper part of the reinforcing rib main body is opened to the upper side of the deck plate and is closed at the closed part. The upper space is formed so that a part of the slab concrete placed on the deck plate is filled in this upper space, so that the deck plate and the slab concrete are securely connected, and Since the space has a cross-sectional shape that expands downward, a greater binding force can be obtained, and even if the amount of biting of the edge of the deck plate into the concrete of the beam part is reduced, the deck plate will fall off when the beam formwork is dismantled. It is possible to eliminate the danger that the deck plate will fall off due to the load even if the piping is hung on the reinforcing rib body of the deck plate. There is no fear. Further, the slab concrete is filled only in the upper space having a small capacity and is not filled in the reinforcing rib main body portion, so that the increase in the concrete amount can be suppressed.

Further, as described in claim 2, a fitting bent portion which is bent downward is formed on one side of the deck plate so as to be fitted into the upper space of the reinforcing rib of the adjacent deck plate. When combined, the deck plates can be connected without any gaps, and the connecting folds have a height that fits only into the upper space, so that the bottom of the upper space remains closed. , It is possible to prevent slag from entering the reinforcing rib body, and there is no need to process a drain hole.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a deck plate for a slab formwork according to an embodiment of the present invention in a direction orthogonal to the longitudinal direction, and FIG.
FIG.

FIG. 2 is a vertical cross-sectional view of a deck plate for a slab formwork of the embodiment in a used state.

FIG. 3 is a cross-sectional view of a reinforcing rib after forming a slab in the example.

FIG. 4 is a cross-sectional view of the formed slab in the example.

FIG. 5 is a sectional view of a deck plate for a slab formwork of another embodiment of the present invention in a direction orthogonal to the longitudinal direction.

FIG. 6 is a cross-sectional view of a reinforcing rib of a deck plate for a slab formwork according to still another embodiment of the present invention.

7 is a cross-sectional view of a deck plate for a slab formwork of a conventional example in a direction orthogonal to the longitudinal direction, which is a cross-sectional view taken along the line BB of FIG.

FIG. 8 is a vertical cross-sectional view of a conventional slab formwork deck plate in use.

FIG. 9 is a sectional view of a slab formed in a conventional example.

[Explanation of symbols]

 1 Deck Plate 2 Reinforcing Ribs 3 Upper Space 3a Upper End Opening 4 Closure 5 Reinforcing Rib Main 6 Bent for Connection

Claims (2)

[Claims] 1. A deck plate (1) for a slab formwork, comprising reinforcing ribs (2) projecting downward, wherein the reinforcing ribs (2) are both longitudinal ends of the deck plate (1). Over the entire length excluding the section and at appropriate intervals in the width direction of the deck plate (1), the deck plate (1) is integrally formed by bending, and the upper space (opening above the deck plate (1) in the sectional shape ( 3) and this upper space
It has a closed part (4) forming the bottom of (3) and a reinforcing rib main part (5) continuous to the lower side of the closed part (4) and extending in the width direction of the deck plate (1). The space (3) is a deck plate for slab formwork whose width on the bottom side is wider than the width of its upper opening (3a). 2. A deck plate (1) having a connecting bent portion (6), wherein the connecting bent portion (6) is formed by bending one side edge in the width direction of the deck plate (1) downward. The height (1) is such that when the (1) are arranged side by side in the width direction, the deck plate (1) is fitted only in the upper space (3) of the reinforcing rib (2) on the other side in the width direction. Deck plate for slab formwork described in.