JPH0913567A - Floor slab and molding method therefor and executing method for floor slab - Google Patents

Abstract

PURPOSE: To engage a floor slab stably with the beam forms of a floor surely, and to simplify floor-concrete construction works with the disposal works of a slab reinforcement and save the labor of the construction works. CONSTITUTION: A plurality of leg sections 12, 12... as end closed sections 15, in which end sections are pushed in parallel at regular intervals in the longitudinal direction, are formed on the rear side of a main plate 11 made of a metal and engaging pieces 16 rectangularly bent on the rear sides are formed integrally at both end sections on the end closed section 15 sides in a floor slab 10, and the leg sections 12, 12... are formed on the rear side of the main plate by bending while leaving projecting pieces in the main plate, in which a plurality of the projecting pieces are molded at regular intervals at both end sections and which is made of the metal. Both end sections of the leg sections 12, 12... are pushed to form the end closed sections 15, and the projecting pieces are bent to the rear side to shape the engaging pieces 16, 16.... The projecting pieces of the floor slab are retained to beam forms 4, and bars are arranged onto the floor slab, in which the projecting pieces at both end sections are bent to lower sections respectively, and floor concrete is placed. Bearing metal fittings 20 with U-shaped inserting sections 23 are mounted on the engaging pieces 16 of the floor slab 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor slab having a new structure, a method for forming the floor slab, and a method for constructing the floor slab, and in particular, it is installed between beam form frames of a structure such as a reinforced concrete structure or a steel reinforced concrete structure. A floor slab for constructing a floor, the floor slab having a locking piece that can stably and securely hold the locked state between the beam formwork of the floor, and a method for forming the floor slab. The purpose of the method is to simplify the construction.

[0002]

2. Description of the Related Art In a structure such as a reinforced concrete structure or a steel frame reinforced concrete structure, in order to construct a concrete floor, a floor deck called a flat deck composed of metal plates is installed between beam formwork of the floor, and A construction method for shortening and labor saving of construction is known.

At present, various types of floor slabs having various structures have been developed and adopted. The structure of the legs can be roughly classified into a closed type and a hollow type. , L-shaped and T-shaped. In addition, a floor slab having a triangle-shaped basic structure is known for the hollow legs.

An example of this will be described with reference to FIGS. In this floor slab 1, a plurality of triangular leg portions 2, 2, ... Are respectively formed at predetermined intervals in parallel with the longitudinal direction on the back surface side of a rectangular metal main plate, and the front surface side is formed as a flat surface 3. Has been done.

Both ends of the leg portions 2, 2, ... Are pressed by press working or the like to be flat end close portions 2a,
2a. The end close parts 2a, 2a are
In order to install the beam form 4 in a stable locked state during construction, the beam form 4 is slightly projected (for example, about 10 mm) from the inner wall surface in advance as a swallowing margin.

A plurality of floor slabs 1 having such a structure are arranged between the beam forms 4 facing each other, and the end close portions 2a thereof are arranged so as to be locked to the piers 4a on the beam forms 4, After fastening the end close part 2a and the pier 4a with the nails 5, the slab rebars 6, 6, ... Are laid on the surface of the floor slab 1, and concrete is poured and solidified to construct the floor concrete 7. .

In the case of the floor concrete 7 using the floor slab 1, it is desirable to slightly overhang the swallowing margin of the end close portion 2a as described above. However, if the overhanging dimension is too large, the concrete as shown in FIG. When placing,
A large void A is formed in the lower part of the swallowing margin, and after solidification of concrete, it becomes a factor of loss of the cross-sectional strength of the beam, and the edge in the vicinity of the end close 2a is corroded, so that the strength of the floor concrete 7 is insufficient. It is the cause.

Further, in the floor slab 1 having a flat surface side, the function of integrating this and the reinforcing bar 6 does not work, and therefore the biting is bad, and even if concrete is poured and solidified, it becomes the floor concrete 7. May not be able to exert its full binding function.

As described above, in order to construct the floor concrete 7 so that the floor slab 1 is kept in a stable locked state between the beam forms 4 and the void A is not formed, the swallowing margin has a certain length. is necessary. However, when the street of the floor slab 1 is bent, the end close portions 2a, 2 of the plurality of laid floor boards 1
It is difficult to secure a uniform swallowing margin for a ... And the floor slab 1 may slip and fall off the beam form 4.

On the other hand, recently, for the beam form 4, for the purpose of resource conservation, there is a tendency to use a ceramic-type extrusion-molded plate or a slate-type beam-form of a press-molded product from a wooden plywood which has been conventionally used. Is increasing. However, a beam form made of plywood requires a step of nailing or the like. In the case of a slate-type beam formwork, a metal anchor bolt or the like is provided in advance so as not to damage the beam formwork, and a step of welding the end close part 2a of the floor slab 1 through this is performed. Is needed.

Therefore, the end close portion 2a of the floor slab 1
It is conceivable that the locking piece is bent downward at a right angle to provide a locking piece.However, since this part has a shape in which the metal plates are folded more than triple, the resistance is large and it may be bent at a right angle even by pressing. It's getting harder.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art.
The purpose is to simplify the construction work of floor concrete with slab rebar arranging work, together with the floor slab equipped with locking pieces that can stably and reliably lock the floor slab to the beam formwork and its forming method. The present invention aims to provide a floor slab construction method that can be reduced in size and labor.

[0013]

In order to achieve the above object, the first invention of the present invention is to provide a plurality of legs on the back surface side of a metal main plate in parallel with the longitudinal direction at predetermined intervals, Sides are flat, and both ends of each leg are pressed to form end-closed parts.In a floor slab, both ends of the metal main plate between the end-closed parts are almost flush with the tip of the end-closed part. It is characterized by integrally forming locking pieces bent downward at right angles so that

According to a second aspect of the invention, the locking piece is rectangular, trapezoidal,
The third invention is characterized in that it has a triangular shape and a semicircular arc shape, and the third invention is characterized in that locking pieces are integrally formed at selected end portions on both end portions of the metal main plate on the end close portion side. To do.

According to a fourth aspect of the present invention, one end of a flat base portion of a metal plate is bent downward at a right angle to form a U-shaped insertion portion at the tip of a hanging portion, and the other end is right angled upward. The present invention is characterized in that the first supporting metal fitting is formed by forming a supporting portion of a concave portion on the upper end of the standing portion that is bent.

According to a fifth aspect of the present invention, one end of a flat base portion of a metal plate is bent downward to form a folded-back portion that extends horizontally inward through a U-shaped holding portion, and the other end is formed into a right angle. The present invention is characterized in that a second supporting metal member is formed by forming a concave supporting portion on the upper end of the rising portion bent upward.

A sixth aspect of the present invention is a metal main plate having a plurality of projecting pieces provided on both ends thereof with cutout portions at predetermined intervals,
A plurality of legs are formed in parallel on the back surface side at a predetermined interval, leaving the projecting piece portions at both ends, and the end side of each leg is pressed into a flat shape to form an end close portion. With
At the same time as the pressing process of the end-closed portion or in a separate step, the protruding piece is bent at a right angle on the back surface side so as to be substantially flush with the end portion of the end-closed portion.

According to a seventh aspect of the invention, a floor slab is arranged between the beam forms via the protrusion before pressing the locking piece, and the protrusion is moved downward so as to closely contact the inside of the beam form. The floor slab is characterized in that it is bent and the end-closed portion of the floor slab is fixed to the pier by fixing means such as nailing.

According to an eighth aspect of the present invention, a U-shaped insertion portion is formed at the tip of a hanging portion obtained by bending the tip of a flat base portion of a metal plate downward at a right angle, and a right angle is formed at the rear end of the base portion. Forming a first supporting metal member in which a recessed supporting portion is formed at the upper end of the standing portion bent upward in a circular shape, and the floor slab inserted into a predetermined locking piece is attached to the insertion portion, The reinforcing bars are sequentially arranged between the beam forms so as to be locked on the beam form, and the reinforcing bars are arranged between the supporting portions of the adjacent first support fittings, and a plurality of reinforcing bars are orthogonally arranged at predetermined intervals on the reinforcing bars. After arranging, the floor concrete is placed on the floor slab.

According to a ninth aspect of the present invention, one end of a flat base portion of a metal plate is bent downward to form a folded-back portion that extends horizontally inward through a U-shaped holding portion, and the other end is formed into a right angle. The 2nd which formed the concave support part in the upper end of the rising part bent upwards
A floor slab is provided between the beam molds so that the end closing parts at both ends lock the floor slab, which constitutes a support metal fitting and holds a predetermined projecting piece in the holding part, and is adjacent to each other. Reinforcing bars are arranged between the supporting portions of the second supporting metal, and a plurality of reinforcing bars are arranged on the reinforcing bars at a predetermined interval in an orthogonal manner, and then floor concrete is placed on the floor slab. Is.

[0021]

According to the first aspect of the present invention, since the locking piece is housed inside the beam form in a close contact state, the beam form provided on both sides of the floor form can be grabbed, and the floor form can move forward and backward. It can be laid stably and securely on the beam form without shifting to the left or right.

According to the second invention, similarly, the locking piece can be laid inside the beam formwork while keeping a close contact, and according to the third invention, there is no locking piece at a part of the end. Even in the floor slab, other locking pieces can be closely attached to the inside of the beam form, so that the stability is not deteriorated and the material can be saved.

According to the fourth invention, the locking piece of the floor slab is the first
It suffices to engage the insertion portion of the support fitting and dispose the reinforcing bar on the support portion of the first supporting fitting. By using this as a mark, the disposition of the reinforcing bar is simplified and labor can be saved. In addition, if this first support fitting is fixed with a tightening fitting such as a rivet,
After placing the floor concrete, it becomes an anchor state and has a good bite with the concrete, so that a stronger and more stable floor concrete can be constructed.

According to the fifth invention, the projecting piece of the floor slab is clamped by the clamping portion of the second support metal fitting, and the reinforcing bar is arranged on the support portion of the second support metal fitting. It has a similar effect.

According to the sixth aspect of the present invention, the locking piece is integrally formed with the end-closed portion of the floor slab at the same time or in a separate step, and the molding of the floor slab is simplified.

According to the seventh aspect of the present invention, the locking piece of the floor slab is closely contacted with the inside of the beam form frame to be locked, so that the floor slab can be reliably and stably locked. As described above, voids are not generated in the vicinity of the end close portion, and the strength of the floor concrete is improved.

According to the eighth and ninth inventions, there is the same effect as the fourth and fifth inventions, the construction thereof is simplified, and the labor can be saved.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the floor slab 1 having the structure shown in FIG.
No. 0 will be described. In the present invention, the floor slab 1
The basic configuration such as legs in 0 is not limited to this,
It can be applied to various well-known floor slabs that have been conventionally adopted.

First, the basic structure of the floor slab 10 shown in FIG. 1 will be described. In the longitudinal direction of the rectangular metal main plate 11, the triangular leg portions 12 formed by bending the back surface side,
.. are formed in parallel at a predetermined interval, and a flat surface 13 is formed on the front surface side. Both ends of the leg portions 12, 12, ... Are formed in end close portions 15 that are pressed flatly via the inclined portions 14. .., which are the subject matter of the present invention, are integrally formed by bending at a right angle downward on the back surface side at both ends of the main plate 11 on which the end close portions 15 are not formed. Reference numeral 34 is a bent piece formed at one end of the main body 11 in the longitudinal direction.

The floor slab 10a shown in FIG. 2 is a modified example in which the locking pieces 16 are selectively formed at both ends of the main body 11. In this example, the locking pieces 16 are formed every other one. However, the invention is not limited to this, and the locking pieces 16, 16 are paired at both ends.
It is not necessary to form the locking pieces 16 and the locking pieces 16 can be selectively provided by alternately forming the locking pieces 16 at both ends.

Next, the molding method of the present invention will be described. FIG. 3 is a plan view of the main plate 11 before the floor slab 10 is formed. The projecting pieces 17, 17, ... For forming the locking pieces 16 at both ends of the main plate 11 are notched portions at predetermined intervals. 18
The main plate 11 is then formed by bending, for example, by roll forming, leaving the projecting pieces 17 and 17 at both ends, and then the leg portions 12 and 12 each having a triangular shape as shown in FIG. , ... are formed in parallel at a predetermined interval.

Further, both end portions of the leg portions 12, 12, ... Are pressed by, for example, press work through the inclined portion 14 as shown in FIG.
Are formed at the same time or in different steps, and the protrusions 17,
Bending the base end of 17, ...
16 are formed. The processing of the locking piece 16 can be performed simultaneously with the pressing processing of the inclined portion 14 and the end close portion 15 or sequentially in separate steps. Although the locking piece 16 is formed in a rectangular shape as shown in the figure, it may have any shape such as a triangular shape, a trapezoidal shape, and a semicircular shape.
Is formed between the leg portions 12 and 12, but is not limited to the above, and it is an arbitrary matter such that it is formed every other one or only one end portion of the leg portion 12.

FIGS. 5 and 6 show an example of a method of constructing a floor slab of the present invention. As the floor slab 10c, a projecting piece 17 before forming a locking piece as shown is used. . Floor slab 10c
Is disposed between the beam form frames 4 by locking the end close portion 15, and the projecting projecting piece 17 is bent downward along the inner side of the beam form frame 4 by a hammer or the like to form an inner surface of the beam form frame 4. The engaging piece 16a is formed so as to come into close contact with. Next, the end close portion 15 is nailed to the pier 4a via the nail 5. For this reason, the locking piece 16a fits tightly on the inner surface of the beam form frame 4, does not protrude excessively, and grabs the beam form frame 4 so that it can be prevented from falling off.
Even with a beam structure without a, the locking piece 1 is the same as the beam form 4.
The beam form 4 can be securely grasped by the 6a, and the locking state of the locking piece 16a increases stability and can be easily fixed. A plurality of floor slabs 10c, 10c, ... Can be connected to the adjacent floor slabs by inserting the bent pieces 34 into the legs 12 located at the outermost ends of the floor slabs 10.

7 to 9 show the first part to be attached to the locking piece 16.
It shows about the support fitting 20. The first support fitting 20 has a U-shaped insertion portion 23 that is folded back inward at the tip of a hanging portion 22 obtained by bending one end of a flat base portion 21 downward at a right angle. In addition, a concave support portion 25 is provided at the upper end of the upright portion 24 in which the other end of the base portion 21 is upright at a right angle. As shown in FIG. 8, the first support fitting 20 has a base portion 21 on the end close portion 15 of the floor slab 10.
And the tip of the locking piece 16 is engaged with the insertion portion 23. In this case, as shown in the drawing, the base portion 2 of the first support fitting 20 is
The first support fitting 20 can be firmly attached to the end close portion 15 of the floor slab 10 by applying rivets 26 to the 1 and the end close portion 15, or by welding. The first support fitting 20 may be made of a metal plate.

FIG. 9 shows an example in which the floor concrete 7 is placed using the first support fitting 20. The floor slab 1
The floor slab 10 with the first support fitting 20 mounted on the
, And the reinforcing bars 6a, 6a, ... Are arranged between the supporting portions 25 of the adjacent first supporting brackets 20, and a plurality of reinforcing bars 6b are arranged orthogonally on the reinforcing bars 6a, 6a ,. After binding the parts, floor concrete 7 is poured. In this case, since the floor slab 10 does not project into the beam form frame 4 as in the conventional case and no void is formed in the vicinity of the end close portion 15, concrete is sufficiently filled in the beam form frame 4 and the strength is improved. In addition, the first support fitting 20 serves as an anchor so that the floor slab 10 and the concrete are firmly joined.

FIG. 10 shows the second support fitting 28 used when the area of the concrete floor to be constructed is large and the steel beam 8 is arranged between the beam forms 4 and 4. The second support fitting 28 has a folded-back portion 31 that extends horizontally inward through a U-shaped holding portion 30 in which one end of a flat base portion 29 is bent downward at a right angle.
A recessed support portion 33 is formed on the upper end of the upright portion 32 in which the other end is upright. In addition, this second support fitting 2
8 is preferably made of a metal plate.

Then, as shown in FIG. 11, the first support fitting 2 is attached to one end close portion 15a on the beam form 4.
The floor slab 10b to which 0 is attached is arranged, and the projecting piece 1 is placed on the steel beam 8.
The second support fitting 28 is arranged by inserting the holding portion 30 into the end close 15b provided with 7, and holding the second holding metal fitting 28. Similarly, a plurality of floor slabs 10b, 10b, ... Are sequentially arranged. Next, between the support parts 25 of the adjacent first support fittings 20 and between the support parts 33 of the second support fittings 28, the reinforcing bars 6a, 6a, ...
Are arranged, a plurality of reinforcing bars 6b are arranged orthogonally on the reinforcing bars 6a, 6a, ... In the case of this floor concrete 7, concrete is sufficiently filled and has strength as in the case of using the first supporting metal fitting 20 alone, and the first and second supporting metal fittings 20, 2
8 can serve as an anchor for strongly connecting the floor slab 10b and the concrete.

Although not shown in the drawings, the base 29 and the end-closed portion 15b of the second support fitting 28 may be firmly attached by rivets or welding, and although not shown, the end-closed portion 15b. The protruding piece 17 on the side may be bent on the back surface of the base portion 29, or may be arranged on the steel beam 8 in the state of the protruding piece 17.

[0039]

Since the present invention is constructed as described above, it has the following effects.

In the floor slabs of the first and second inventions, since the locking pieces are formed at both ends of the floor slab, when the floor slab is laid on the beam form, the locking pieces are beam-shaped. It can be closely attached to the inside of the frame, and the end-closed part of the floor slab can be installed stably and securely without extra protrusion into the beam formwork.

Further, it is possible to easily visually confirm whether or not the locking piece is in close contact with the inner surface of the upper end of the beam form, and it is possible to prevent the floor slab from falling off and skidding. Can be done reliably.

Further, unlike the conventional case, the flooring slab does not need to have a swallowing margin, and when pouring concrete into the floor, there is no void generated under the end close portion, and the cross-sectional strength of the beam as designed can be maintained. .

According to the third aspect of the present invention, even if the floor slab has no locking pieces at some ends, the other locking pieces are in close contact with the inside of the beam formwork. Without decreasing the stability of
Material can be saved.

In the fourth and fifth inventions, the first and second support fittings are attached to the floor slab, and the reinforcing bar reinforcement is securely and stably supported in the recess formed in the support portion. This can serve as a mark when arranging the bars in an orthogonal manner above this, and can simplify the work and save labor. Moreover, the standing pieces and the supporting pieces of the first and second support fittings serve as anchors when the concrete is poured, and the floor slab is solidified with the concrete and has rigidity together with the reinforcing bars. Can build concrete.

According to the sixth aspect of the present invention, the locking piece can be integrally formed at the same time as the end closing or in a separate process, and the labor of the molding process can be reduced.

According to the seventh aspect of the invention, the locking pieces are in close contact with the inside of the beam form, and have the same effects as those of the first and second aspects of the invention, and the construction can be improved.

In the eighth and ninth inventions, the fourth invention
And, there is the same effect as the fifth invention, and the construction can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a floor slab of the present invention viewed from the back side.

FIG. 2 is a perspective view of another example of the floor slab of the present invention viewed from the back side.

FIG. 3 is a partially cutaway plan view of a metal plate before floor molding.

FIG. 4 is a perspective view showing a molded state of the metal plate as seen from the back surface.

FIG. 5 is a front view of a floor slab used in the construction method of the present invention.

FIG. 6 is an enlarged side view showing the construction method of the present invention.

FIG. 7 is a perspective view showing a first support fitting of the present invention.

FIG. 8 is a side view showing an attached state of the first support fitting of the present invention.

FIG. 9 is an enlarged explanatory view showing the same usage example.

FIG. 10 is a perspective view showing a second support fitting of the present invention.

FIG. 11 is an enlarged explanatory view showing the same usage example.

FIG. 12 is an enlarged explanatory view showing a usage example of the first and second support fittings of the present invention.

FIG. 13 is a partially cutaway perspective view of a conventional floor slab viewed from the back side.

FIG. 14 is an enlarged explanatory view showing the same usage example.

[Explanation of symbols]

 10, 10c Floor slab 11 Metal main plate 12 Leg part 15 End close part 16 Locking piece 20 First support metal fitting

Claims (9)

[Claims] 1. A metal main plate is provided with a plurality of legs parallel to the longitudinal direction at predetermined intervals on the back side of the metal main plate, the front side is formed flat, and both ends of each leg are pressed respectively to end close. In the floor slab that is the part, it is necessary to integrally form the locking pieces that are bent downward at right angles so that both ends of the metal main plate on the side between the end-closed parts are substantially flush with the end part of the end-closed part. Characterized floor slab. 2. The floor slab according to claim 1, wherein the locking piece has a rectangular shape, a trapezoidal shape, a triangular shape, or a semicircular arc shape. 3. The floor slab according to claim 1, wherein a locking piece is integrally formed at a selected predetermined end on both ends of the metal main plate on the end close side. 4. An upright position in which a U-shaped insertion portion is formed at the tip of a hanging portion obtained by bending one end of a flat base portion of a metal plate downward at a right angle and bending the other end upward at a right angle. 4. A floor slab comprising a first support fitting having a recessed support portion formed at an upper end of the portion, and the engaging piece of the floor slab according to claim 1, 2 or 3 being engaged with the insertion portion. . 5. A folded-back portion extending horizontally inward is formed through a U-shaped holding portion obtained by bending one end of a flat base portion of a metal plate downward, and the other end is bent upward at a right angle. A floor slab comprising: a second support metal member having a concave support portion formed at an upper end of the upright portion, and the projection of the floor slab according to claim 1, 2 or 3 being sandwiched between the sandwiching portions. 6. A metal main plate having a plurality of projecting pieces provided on both ends thereof with cutouts at predetermined intervals, wherein a plurality of leg sections are arranged in parallel on the back surface side while leaving the projecting piece portions of the both end portions. In addition, the end portions of each leg are pressed flatly to form the end-closed portion, and the projecting pieces are end-closed at the same time as the pressing of the end-closed portion or in another step. A method of forming a floor slab, which comprises forming a locking piece that is bent at a right angle on the back surface side so as to be substantially flush with the end of the floor slab. 7. A floor slab is arranged between the beam formwork via the projecting piece before pressing the locking piece, and the projecting piece is bent downward so as to closely contact the inside of the beam formwork. A construction method of a floor slab, which comprises constructing a floor slab by applying a fixing means such as a nail to the end close part of the pier. 8. A U-shaped insertion portion is formed at the tip of the hanging part obtained by bending the tip of the flat base of the metal plate downward at a right angle, and the rear end of the base is raised upward at a right angle. The first support metal fitting is formed by forming a recessed support portion on the upper end of the bent upright portion, and a floor slab in which a predetermined locking piece is engaged with this insertion portion is used to make the end close portions at both ends on the beam formwork. After sequentially arranging between the beam formwork so as to be locked to, and arranging the reinforcing bars between the supporting portions of the adjacent first supporting brackets, and arranging a plurality of reinforcing bars orthogonally on the reinforcing bars at predetermined intervals, A method for constructing a floor slab, which comprises placing a floor concrete on the floor slab. 9. A flat base portion of a metal plate is bent downward at one end to form a folded-back portion extending horizontally inward through a U-shaped holding portion, and the other end is bent upward at a right angle. The second support metal fitting is formed by forming a concave support portion at the upper end of the upright portion, and the floor slab holding a predetermined projecting piece in this holding portion locks the end close portions at both ends onto the beam formwork. The floor slab is arranged between the beam formwork, the reinforcing bars are arranged between the supporting portions of the adjacent second support fittings, and a plurality of reinforcing bars are arranged on the reinforcing bars at a predetermined interval at right angles. A method for constructing a floor slab, which comprises placing a floor concrete on the top.