JP3073932B2 - Floor structural materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of producing a plant in a state where a floor reinforcing bar is attached to a deck plate, carrying the same to a construction site and installing the same. The present invention relates to a floor structural material to be cast to form a floor slab of a building.

[0002]

2. Description of the Related Art As this kind of floor structural material, there is, for example, a structure disclosed in Japanese Utility Model Publication No. 2-29137.

As shown in FIGS. 1 and 2, for example, these floor structural members 1 are composed of a deck plate 2 on which reinforcing ribs are formed along a longitudinal direction, and a reinforcing rib on an upper surface of the deck plate 2. To the connecting support bars 3 disposed along the short direction perpendicular to the end portions, the end fixing members 4 and 4 disposed at both ends in the longitudinal direction of the deck plate 2, and between the end fixing members 4 and 4. The upper chord 5 and the lower chord 6 which are connected in the erected state in the up and down direction, and the vertical lattice 7 which connects the upper chord 5 and the lower chord 6 to each other.

[0004] Reinforced lattice beams formed by the upper and lower chord bars 5 and 6 and the connecting support bars 3 are formed by bending the upper and lower bent portions of the vertical lattice bars 7 meandering between the upper and lower chord bars 5. The upper and lower chordal bars 5 and 6 are fixed to each other by spot welding or the like, thereby reinforcing them so as not to be deformed by a compressive force from above.

The connecting support bar 3 is formed in a continuous mountain shape, and the flat bottom side is fixed to the upper surface of the deck plate 2 by welding or the like, and the top of the mountain shape straddles the reinforcing steel lattice beam. Is fixed to the upper chordal bar 4 by spot welding or the like, whereby the connecting support bar 3 supports the rebar lattice beam in a suspended state, and the end fixing members 4, 4.
Works as a member to prevent the reinforcement lattice beam from collapsing,
Further, it also functions as a spacer for keeping a constant interval in the height direction from the upper surface of the deck plate 2 to the lower chord 6.

[0006] The floor structural material 1 is produced in a factory with a floor reinforcing bar including a reinforcing lattice beam attached to a deck plate 2, carried into a construction site and installed, and if necessary, a metal lath for crack prevention is provided. After attaching the floor slab, concrete is cast using the deck plate with the floor reinforcement as a discarding formwork to form a floor slab of the building.

In this type of floor structural material, the short side direction of the deck plate 2 on which the connecting support bars 3 extend is a fixed length, and the longitudinal direction of the deck plate 2 on which the vertical lattice bars 7 extend is the length of the building. Set it to any length that matches the floor structure,
The height of the floor rebar is set to an arbitrary length suitable for the thickness of the floor slab, and a plurality of floor structural materials 1 having the same configuration are juxtaposed adjacent to each other in the short direction of the deck plate 2. use.

[0008]

As described above, in the case of the conventional floor structural material 1 in which the vertical lattice bars 7 are used as the floor reinforcing bars and the reinforcing lattice beams are used, there are the following points to be improved. Was.

First, the arcuate surfaces of the upper and lower chord bars 5 and 6 with a circular cross section and the arcuate surface obtained by bending the vertical lattice lattice 7 with a circular cross section are welded in a state where they are in point contact. Therefore, when welding, it is necessary to accurately position the two and fix and hold them so as not to cause misalignment, and it is difficult to attach the vertical lattice streak 7, and it depends on the quality of the attaching work. However, there is a possibility that the vertical lattice 7 is welded in an inclined and distorted state, or the two are separated from each other and welding is insufficient. In this case, the strength is reduced and the quality is reduced. Not stable.

Second, the length of the deck plate 2 in the longitudinal direction of the deck plate 2 and the height of the floor rebar are selected in accordance with the floor structure of the building in which the floor structural material 1 is used. Vertical lattice 7 that needs to select both height and height
In the case of (1), various kinds of parts having different lengths and heights must be prepared as stock when manufacturing the floor structural material 1, or the setup must be rearranged in conformity with the shipment, thereby reducing the production cost and the work This was a factor that impaired efficiency improvement.

Third, the connecting support bar 3 is connected to the upper chord bar 5, but is not connected to the lower chord bar 6, so that the function as a fall prevention member for the reinforced lattice beam is impaired. It is.

Therefore, in the present invention, in order to solve these problems of the prior art, the use of the vertical lattice muscle is omitted, the function of the vertical lattice muscle is burdened on the connection support muscle, and the connection support muscle is mounted on the floor. It is an object of the present invention to provide a floor structural material that can share a connecting support bar in conformity with the case where the height position of the upper chord is changed depending on the thickness of the slab.

[0013]

In order to achieve this object, a floor structural material of the present invention comprises a deck plate and a floor reinforcing bar mounted on an upper surface of the deck plate.
The floor reinforcing bars are end fixing members juxtaposed at both ends in the longitudinal direction of the deck plate, upper and lower parallel chord bars and lower chord bars connected vertically between the end fixing members, and short portions of the deck plate. It is composed of connecting support bars arranged side by side in the hand direction, and the connecting support bars are provided with a vertical connecting portion projecting upward and bent and formed so as to straddle the upper chord muscle and the lower chord muscle. The upper and lower chords are integrally connected on the inner surface that abuts the upper and lower chords, and the upper and lower chords of each row adjacent in the short direction of the deck plate are interconnected by the connection support muscle, The vertical connection portions of the connection support bars were alternately turned in each row adjacent to each other in the longitudinal direction of the deck plate, and were inclined so as to face each other.

In the floor structural member having the above-described structure, the upper and lower chords are integrally connected via the vertical connecting portion of the connecting support bar inclined in the longitudinal direction of the deck plate, so that the vertical connection of the connecting support bars is achieved. The section can function in the same manner as the vertical lattice of the prior art, and the vertical lattice can be omitted. In the floor structural material, the lower chord may be disposed immediately below the upper chord, and the vertical connecting portion of the connecting support may be bent in an inverted U-shape. By integrally connecting the upper chordal muscle and the lower chordal muscle through the vertical connecting portions of the pieces, a structure that is particularly strong against deformation due to a compressive force from above can be obtained. In the floor structural material, two lower chords are disposed in parallel on both sides immediately below the upper chord, and a vertical connecting portion of the connection supporting muscle is bent and formed in an inverted V shape. There is a structure in which the function as a fall prevention member is strengthened by integrally connecting the upper chord muscle and the lower chord muscle with two pieces of a vertical connecting portion inclined in a mountain shape.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A floor structural material according to the present invention will be described below in detail with reference to the embodiments shown in FIGS.

The first floor structural material 10 shown in FIGS. 3 to 5 has a rectangular shape in which the width in the short direction is fixed and the length in the long direction is adapted to the structure of the building as in the conventional structure. On an iron plate,
A deck plate 11 on which reinforcing ribs are formed along the longitudinal direction is used, and a floor reinforcing bar is attached to an upper surface of the deck plate 11.

The floor reinforcing bars are provided at both ends of the deck plate 11 in the longitudinal direction, and the base thereof is attached to the deck plate 1.
1 and both end portions are fixed to the end fixing member 12, and the end fixing members 12, 12 are fixed to the end fixing members 12, 12, respectively.
Upper and lower parallel muscles 1 connected in an erect state between 12
3 and the lower chords 14 are arranged side by side at predetermined intervals in the longitudinal direction of the deck plate 11 along the short direction perpendicular to the reinforcing ribs. A connecting support bar 15 for connecting the lower chord bar 14 is provided.

Each of the connecting support bars 15 includes an upper chord bar 13 and a lower chord bar 1 at each position intersecting the upper chord bar 13 and the lower chord bar 14.
4 is provided, a vertical connecting portion 16 that is bent in an inverted U-shape and protrudes to the upper surface of the deck plate 11 is provided, and two parallel reinforcing bars of the vertical connecting portion 16 are an upper chordal bar 13 and a lower chordal bar. The upper end is placed on the upper chord muscle 13 in such a manner that the upper end 14 is held from both sides.

In order to provide the connecting support bars 15 with the same function as the conventional vertical lattice bars, the vertical connecting portions 16 of the adjacent connecting support bars 15 are alternately turned along the longitudinal direction. In this state, a portion where the vertical connecting portion 16 joins the upper chordal muscle 13 and the lower chordal muscle 14 and a horizontal portion between the vertical connecting portion 16 which joins to the upper surface of the deck plate 11 are welded by spot welding or the like. And connect them together.

The inclination angle of the vertical connecting portion 16 in the connecting support bar 15 is set by the height position of the upper chord bar 13 and the length of the vertical connecting portion 16, and the connecting support bar 15 adjacent to the deck plate 11 in the longitudinal direction of the deck plate 11. The tip of the vertical connecting portion 16
Normally, it is used in a state of contacting or approaching as shown by a solid line in FIG. Therefore, usually, several kinds of connection support bars 15 having a longer vertical connection portion 16 are prepared in advance,
The connecting support bar 15 having the length of the vertical connecting portion 16 adapted to the height position of the upper chord bar 13 due to the difference in the thickness of the floor slab
However, even in such a case, compared with the conventional floor structural material 1 in which various kinds of vertical lattice bars 7 having different heights are prepared in advance, the improvement in productivity and the reduction in cost can be achieved. Notable.

Further, the floor structural material 10 having the above structure is shown in FIG.
As shown by the imaginary line, since the height position can be changed by using the adjacent vertical connecting portions 16 in a separated state, the height position of the upper chordal muscle 13 can be changed by the difference in the thickness of the floor slab. Even if it is changed, a common connection support bar 15 can be used by changing the inclination angle of the vertical connection unit 16 so as to be adapted to this, and the type of the connection support bar 15 prepared in advance according to the thickness of the floor slab. Can be extremely reduced, which can contribute to improvement in productivity and reduction in cost.

In the floor structural member 10 having the above-described configuration, the vertical lattice 7 is not used unlike the conventional floor structural member 1, and the vertical connecting portion 16 of the connecting supporting bar 15 bent and formed in an inverted U shape is used. Since the upper and lower chordal muscles 13 and 14 are welded together in a sandwiched state, the vertical connecting portion 16 also functions as a vertical lattice, and the vertical lattice is omitted, thereby completely eliminating the problems of the prior art. Can do things.

That is, instead of the vertical lattice 7, the upper chord 1
The vertical connecting portion 16 of the connecting support bar 15 connecting between the third and lower chordal muscles 14 straddles the upper chordal muscle 13 and the lower chordal muscle 14 and makes a surface contact over half the circumference of the upper chordal muscle 13 and contacts the lower chordal muscle 14. Since both sides are in contact with each other, positioning and fixing and holding during welding are almost unnecessary, work is extremely simple, and strong welding can be performed.

In addition, since the vertical lattice bars 7 which require a larger number of types of inventory than other parts for selecting both the length and the height are omitted, the inventory can be reduced and the process management plan can be easily made. As a result, production costs can be reduced and work efficiency can be improved.

The connecting support bars 15 which bear the function of the vertical lattice bars 7 are used in a state where the inclination angle of the vertical connecting portion 16 is changed, so that the floor reinforcing bars used according to the difference in the thickness of the floor slab. Even when the type is changed, a common connecting support bar 15 can be used, the type and stock of the connecting supporting bar 15 are reduced, the process management plan is simplified, the production cost is reduced, and the work efficiency is improved. Can be achieved.

Further, the vertical connecting portion 16 of the connecting support bar 15
Is also connected to the lower chord muscle 14, the function as a member for preventing the floor rebar from falling down is enhanced.
5 cooperates with the end fixing member 12 to function as a spacer of a floor reinforcing bar for holding the lower chord bar 14 at a predetermined height from the upper surface of the deck plate 11 and to deform the floor reinforcing bar in response to a compressive force from above. It also has a function as a reinforcing member that reinforces it so as not to reinforce it, and can sufficiently cover a decrease in strength due to the omission of the vertical lattice streaks 7.

FIGS. 6 and 7 show an embodiment of the second floor structural member. In this floor structural member 20, the vertical connecting portion 26 of the connecting support bar 25 is formed in an inverted V-shape (a mountain shape). In this case, the end fixing member 22 and the lower chordal bar 24 are changed to have a configuration different from that of the first floor structural member 10 so as to be adapted to this. In addition to the same effect as in the case of 10, the reinforcement against the compressive force from above and the function of preventing the deck plate from falling down in the short direction are further strengthened.

The floor structural member 20 is formed of the end fixing member 12.
A cross-shaped end fixing member 22 in which horizontal fixing pieces 22b are welded in a crossed state is used at the height direction intermediate portion of the vertical fixing piece 22a having the same configuration as that of the vertical fixing piece 22a. The upper chordal bar 23 is erected with both ends fixed to each other, and two horizontally parallel lower chords 24, each having both ends fixed to both ends of the horizontal fixing piece 22 b, are erected. Deck plate 2 in such a manner that the vertical connecting portion 26 straddles the upper chord 23 and lower chord 24
1, a connecting support bar 25 having a horizontal portion welded thereto is provided.

The inner surface of the vertical connecting portion 26 and the upper and lower chordal bars 23 and 24 which are in contact with the inner surface of the vertical connecting portion 26 are welded by spot welding or the like, so that the upper chordal bars of each row adjacent in the lateral direction of the deck plate 21 are welded. 23 and lower chord muscle 24
5, the connecting support bars 25 of each row adjacent to each other in the longitudinal direction of the deck plate 21 alternately change the direction of the vertical connecting portions 26 to incline in the opposite direction, and the connecting supporting bars 2
5 are arranged so as to have a flat shape and a turtle pattern as shown in FIG.

[0030]

As is clear from the above embodiments, in the floor structural material according to the present invention, the use of the vertical lattice in the prior art is omitted, and the function of the vertical lattice is imposed on the connecting support muscle. The following effects can be obtained.

In the floor structural material of the present invention, the upper and lower chords are integrally connected via the vertical connecting portion of the connecting support bar, so that the vertical lattice bars according to the prior art can be omitted and the vertical lattice bars can be omitted. By changing the inclination angle of the connecting part, it is possible to reduce the variety of connecting supporting muscles,
Installation work of floor rebar becomes easy, various types of parts with different lengths and heights are prepared as stock, and the work of rearranging the setup is reduced according to shipment, reducing production costs and improving work efficiency. Can be planned.

Further, by connecting the upper and lower chords integrally through two vertical connecting portions of the connecting support bars formed in an inverted U-shape, deformation is prevented particularly by a compressive force from above. Unlike the case of the vertical lattice streak in the prior art, the positioning is easy, the displacement is less likely to occur, and a reliable connection can be obtained.

Further, by connecting the upper chordal bar and the lower chordal bar integrally with the two inclined pieces of the vertical connecting portion formed in an inverted V-shape, particularly as a member for preventing the deck plate from falling down in the lateral direction of the deck plate with respect to the floor reinforcing bar. The functions have been enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of a floor structural material according to a conventional technique.

FIG. 2 is an enlarged longitudinal sectional view showing a main part of FIG. 1;

FIG. 3 is an essential part perspective view showing a first embodiment of a floor structural material according to the present invention.

FIG. 4 is an enlarged plan view showing a main part of FIG. 3;

FIG. 5 is an enlarged longitudinal sectional view showing a main part of FIG. 4;

FIG. 6 is an enlarged plan view of a main part showing a second embodiment of the floor structural material according to the present invention.

FIG. 7 is an enlarged longitudinal sectional view showing a main part of FIG. 6;

FIG. 8 is a front view showing a main part of the floor structural material according to the first and second embodiments of the present invention.

[Explanation of symbols]

 1,10,20 Floor structural material 2,11,21 Deck plate 3,15,25 Connection support bar 4,12,22 End fixing material 5,13,23 Upper chord 6,14,24 Lower chord 7 Vertical lattice streak 16,26 Vertical connection

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04B 5/40

Claims (3)

(57) [Claims] 1. A floor structural material comprising a deck plate on which a floor reinforcing bar composed of an end fixing member, an upper chord bar, a lower chord bar, and a connecting support bar is attached, wherein the end members are provided at both ends in the longitudinal direction of the deck plate. A part fixing material is juxtaposed, and the upper chord and the lower chord arranged in parallel to a position immediately below the upper chord are laid between opposing end fixing materials, and both ends are connected to each other. The connecting support bars that connect the upper and lower chords of each row adjacent to each other are vertically connected to each other at positions intersecting with the upper and lower chords and bent in an inverted U-shape protruding upward in an inclined manner. The connecting support bars are provided by two parallel reinforcing bars of the vertical connecting portion, which hold the upper and lower chords from both sides, respectively, and the upper and lower chords are placed in such a manner that the upper ends are placed on the upper chords. It is connected integrally by contacting the muscle, A floor structural material characterized in that the vertical connecting portions are alternately turned in each row adjacent to each other in the longitudinal direction of the deck plate and inclined in a facing manner. 2. The connecting support muscle changes a tilt angle of the vertical connecting portion so as to be adapted to a height position of the upper chord muscle,
The floor structural material according to claim 1, wherein the structural member can be connected to the upper chord material and the lower chord material. 3. A floor structural material comprising a deck plate on which a floor reinforcing bar composed of an end fixing member, an upper chord bar, a lower chord bar, and a connecting support bar is attached, wherein the end plate is provided at both ends in the longitudinal direction of the deck plate. A part fixing material is juxtaposed, and the upper chord and the lower chord, two of which are arranged in parallel on both sides of the position immediately below the upper chord, are connected between the opposing end fixing materials, and both ends are connected. The connection supporting muscles for connecting the upper and lower chords of each row adjacent in the short direction of the plate have an inverted V-shape that projects upward in an inclined manner at each position intersecting with the upper and lower chords. A bent vertical connecting part is provided, and the connecting support bars are two reinforcing bars that slope in the shape of a vertical connecting part, holding the upper and lower chords from both sides and placing the upper end on the upper chord. Abuts the upper and lower chords in a connected manner A floor structural member characterized in that the vertical connecting portions of the connecting support bars are alternately changed in direction in each row adjacent to each other in the longitudinal direction of the deck plate so as to be opposed to each other.