JP2813846B2 - Discarded formwork for reinforced concrete structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scrap frame for a reinforced concrete structure in the construction field.

[0002]

2. Description of the Related Art In a reinforced concrete structure, in particular, in a formwork for concrete placing of an underground double pit on the lowest floor, a plywood dam 2 reinforced by a pier 1 as shown in FIG. 19 is used. . In the figure, reference numeral 3 denotes an underground beam, and 4 denotes a floor slab. In the underground beam 3, a formwork made of a pier 1 and a dam board 2 is provided with rigidity by a horizontal flap 6 and a vertical flap, and is held by a separator 5. Assembled and formed by casting concrete inside. The formwork of the floor slab 4 is combined with the formwork of the underground beam 3, but is supported on the lower surface of the floor slab 4 by the support column 8 with the horizontal flutter 6 and the large puller 7 interposed therebetween. Is formed. The portion surrounded by the underground beam 3 and the floor slab 4 becomes the underground double pit 9. In the figure, reference numeral 10 denotes a pillar.

In the formwork method shown in FIG. 19, it is necessary to remove the formwork, flutters, supports, etc. in the pits 9 after the concrete has been cast and hardened. Leave it open and remove it from here later. This removal is extremely labor intensive because it takes place in a closed underground space.

[0004] In order to reduce the work of removing the formwork, concrete placement of the underground beam 3 and the floor slab 4 is divided, and after the underground beam concrete is hardened, the formwork on the side of the underground beam 3 is formed. By removing the flutter, installing a formwork for the floor slab 4 and pouring concrete, a method of limiting the removal from the closed place to the formwork for the floor slab 4 may be adopted.

As another method of reducing the removal of the formwork, there is a method of leaving the formwork as a discarded formwork as it is. This includes a method in which the formwork on the side surface of the underground beam 3 is discarded, a method in which the formwork for the floor slab 4 is discarded, and a method employing both of them. As one, use a keystone deck plate 12 as a formwork for the floor slab 4,
By supporting the deck plate 12 with the truss beams 13, the columns are omitted.

[0006]

However, in the formwork method including the keystone deck plate 12 and the truss beams 13, the entire formwork is heavy and difficult to handle.
It is difficult to treat the slag that occurs during concrete casting.

[0007] In addition to the above, there are methods of using a precast concrete plate or an asbestos slate plate, a method of using a riblas plate, and a method of using a concrete block.

[0008] Among them, in the method in which the concrete precast plate is used as a discarded form, the gravity of the concrete precast plate itself is heavy, and it is difficult to form holes for human holes, ventilation holes, water holes, and pipes. . This is the same even when the asbestos slate plate is used.

[0009] In the method of using a ribbed slab as a discarded form, it is necessary to reduce the slump of the concrete to be cast due to the large number of irregularities. In addition, since the softness of the concrete is high, slag occurs during casting. I will. Furthermore, the surface of the finished product becomes uneven because it is a riblas plate. In addition, it is difficult to drill holes for human holes, air holes, water holes, and pipes.

Further, in the method of using a concrete block as a discarded formwork, the underground beam 3 is mainly combined with a concrete precast slab as a discarded formwork of the floor slab 4. However, the beam width becomes excessively large, and it takes time and effort to assemble a concrete block as a formwork, and the construction period becomes longer. Further, the concrete block form also has a drawback that it is difficult to form holes for human holes, ventilation holes, water holes, and pipes.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the prior art and to reduce or eliminate the work of removing the formwork as a disposable formwork. It is an object of the present invention to provide a scrap frame for a reinforced concrete structure that can cope with the problem and that can be easily processed such as drilling.

[0012]

Means for Solving the Problems In order to achieve the above object, the present invention firstly uses a translucent polymer compound such as polypropylene, polycarbonate, or vinyl chloride as a material, and partitions the internal space with ribs. Using a transparent synthetic resin corrugated cardboard-shaped hollow panel formed with a large number of cavities in one direction, this hollow panel was appropriately joined to form a rigid synthetic resin dam, and secondly, polypropylene, Use a transparent synthetic resin corrugated cardboard-shaped hollow panel made of a translucent polymer compound such as polycarbonate and vinyl chloride, and separating the internal space with ribs and forming a large number of cavities in one direction. Thirdly, a rigid and heat-insulating synthetic resin dam is formed by joining panels appropriately. Third, a concave or convex portion is formed on the hollow panel surface located on the upper surface. Fourth, to form a rigid synthetic resin damping board by appropriately overlapping and joining the hollow panels, to form a joint for jointing with a stepped end, The gist of the fifth aspect is that the synthetic resin corrugated cardboard-shaped hollow panel is a closed hollow heat-insulated panel with a closed end.

[0013]

According to the first aspect of the present invention, since the hollow panel is made of a synthetic resin, the material itself is weighed. In addition, a plurality of hollow portions extending in one horizontal direction are arranged in a row in a row. Since it has a shape like a corrugated cardboard, a large number of hollow portions can be taken out, and the weight can be further reduced. And since such a synthetic resin corrugated cardboard-shaped hollow panel is used, the synthetic resin weir board obtained by appropriately joining the corrugated board becomes lighter. It becomes a board.

When joining a plurality of synthetic resin corrugated cardboard-shaped hollow panels in a stacked manner,
For example, when setting a synthetic resin corrugated cardboard hollow panel in a wooden frame or the like, the hollow panel itself has transparency, so that objects under the hollow panel can be seen and set easily, and nailing can be performed. However, it can be performed reliably and easily at a predetermined location.

[0015] Moreover, the crevice board formed by suitably joining the transparent hollow panels as described above also has transparency. For example, even when assembled as a weir board and then set in a wooden frame, the lower part is visible. It can be performed reliably and easily at the location. In addition, it is possible to visually check the filling property of the concrete, and it is also possible to prevent the occurrence of junk or the like.

In particular, since the hollow panel has many hollow portions as a whole in a corrugated cardboard shape, and accordingly many thin portions, it is easy to cut with a knife or the like, and moreover, free cutting according to each construction site. Is possible and convenient. It should be noted that even after the hollow panels are appropriately joined to form a weir plate, there are still many hollow parts, so that the cutting with a knife or the like is still easy. In addition, since the hollow part is a corrugated cardboard-shaped hollow panel, the thickness of the partition part that separates each hollow part is also thin, so it is possible to drill holes in the horizontal direction such as through holes, vent holes, water holes, and holes for piping. It will be easy.

According to the second aspect of the present invention, in addition to the function of the first aspect, the synthetic resin corrugated cardboard-shaped hollow panel is a hollow panel having heat insulation and is used as a driving heat insulating material. By doing so, it is possible to realize an improvement in the heat insulating property of the outer wall and the like and an improvement in the dew condensation preventing function.

According to the third aspect of the present invention, in addition to the functions of the first and second aspects, the adhesion between the weir board and the concrete can be strengthened, and this makes the form most suitable as a mold.

According to the fourth aspect of the present invention, in addition to the above operation, it is possible to prevent the slag of concrete from flowing out from the joint between the dams.

According to the fifth aspect of the present invention, in addition to the above-mentioned functions, the synthetic resin corrugated cardboard hollow panel is a closed panel having a closed end, so that convection of the air inside can be completely prevented. , Can exhibit higher heat insulating properties.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a discarded frame for a reinforced concrete structure according to the present invention. In the drawing, reference numeral 14 denotes a corrugated hollow panel made of a synthetic resin made of a hard synthetic resin. The panel is a flat one as shown in FIGS. 10 and 11, which is formed by partitioning the internal space in parallel by vertical ribs 15 connecting the front panel and the lower panel, and forming a large number of cavities 16 in one direction. Polypropylene, polycarbonate, polystyrene, vinyl chloride, high-density polyethylene and other high-molecular compounds, made of hard thermoplastic resin or unsaturated polyester resin, thermosetting resin such as phenolic resin,
It can be obtained by vacuum molding, blow molding or extrusion molding. Incidentally, the thickness of the synthetic resin sheet forming the hollow panel 14 is suitably about 1.5 mm. However, since the polymer compound has a light-transmitting property, the synthetic resin sheet also has transparency. Things.

This synthetic resin cardboard hollow panel 14
(Two sheets in the figure) are overlapped and joined to each other with an adhesive or the like to form a rigid synthetic resin damping plate 17. At the time of this superposition, the ends of the panels 14 were shifted in the width direction so that the ends were stepped to form joints 18 for jointing. Further, a concave portion 19 is formed as a concrete joining means on the surface of the hollow panel 14 located on the upper surface of the weir plate 17.

FIGS. 2 and 3 show a second embodiment of the present invention, in which the panels 14 to be overlapped and joined together have ends shifted not only in the width direction but also in the length direction.
8 is formed on the entire outer peripheral end. In addition, weir board 1
On the surface of the hollow panel 14 located on the upper surface of 7, the projections 20 are formed at appropriate intervals by driving nails, screws or the like as concrete joining means.

FIGS. 4 and 5 show a third embodiment in which three synthetic resin corrugated cardboard-shaped hollow panels 14 are stacked to form a synthetic resin dam 17. The number of superimposed hollow panels 14 for forming the weir plate 17 is not particularly limited, and is provided on condition that desired rigidity can be obtained as required. As a fourth embodiment, it is possible to withstand a large load by combining the hollow panel 14 with a void shape as shown in FIGS.

FIGS. 8 and 9 show a fifth embodiment, in which horizontal flanges 21a are provided at appropriate intervals on the surface of the hollow panel 14 as concrete joining means on the surface of the hollow panel 14 located on the upper surface of the weir. The locking rib 21 having the shape is integrally formed and protruded.

FIGS. 12 and 13 show a sixth embodiment. The synthetic resin corrugated cardboard-shaped hollow panel 14 shown in FIGS.
3 to form a closed panel. In this embodiment, the closing plate 2 is used.
3 is a case where it is integrally formed with the main body of the hollow panel 14,
As a seventh embodiment, as shown in FIGS.
In the eighth embodiment, as shown in FIG. 16 and FIG. 17, two small ends having a cavity 16 are formed by closing the small end with a small reinforcing material 24 having a. It is also conceivable to stick and block.

As described above, in the sixth to eighth embodiments, the synthetic resin corrugated cardboard-shaped hollow panel 14 is a closed panel in which the small end at which the cavity 16 is opened is closed, so that the convection of the air inside is reduced. It can be completely blocked and can exhibit higher heat insulating properties.

Next, the method of use will be described. FIG.
Is an example of a formwork for concrete casting of a double-pitted underground pit on the lowest floor. The underground beam 3 is a conventional formwork consisting of a pier 1 And the inside constituting the pit 9 is a synthetic resin dam 1 formed by joining a plurality of corrugated hollow panels 14 made of synthetic resin according to the present invention.
The rigidity is given by the horizontal flaps 6 and the square flaps 22 using the components 7, respectively.

The form of the floor slab 4 is combined with the form of the underground beam 3, and the synthetic resin dam 17 of the present invention is used. In this case, the joints 18 are joined to form a joint. Only the lower surface of such a joint is supported by the column 8 with the horizontal flute 6 and the large pull 7 interposed.

When the concrete is cast in this manner, the underground beam 3 and the floor slab 4 are formed. However, if the damping plate 17 is made transparent, the filling property of the concrete can be visually checked. , Junka, etc. can be prevented. Furthermore, in the formwork for the floor slab 4, it is possible to prevent runoff of concrete from the joint by jointing with the joint 18.

After the concrete is hardened, the weir plate 17 is integrated with the concrete by the concrete joining means by the concave portions 19, the convex portions 20, and the locking ribs 21 to form a discarded form frame. The outer pier 1 and the plywood weir 2 are removed from the pier 9 and only the home tie for fixing the butter 6 and the separator 5, the square butt 22, the large puller 7, the support 8, etc. are inspected at the pit 9. You can remove it from.

Further, the synthetic resin corrugated cardboard-shaped hollow panel 14 of the present invention divides the internal space in parallel by vertical ribs 15 and forms a large number of cavities 16 in one direction. I do. Therefore, by using this as a driving heat insulating material, it is possible to realize an improvement in the heat insulating property of the outer wall and the like and an improvement in the dew condensation preventing function.

In order to prevent the convection of air in the cavity 16 and obtain the heat insulating effect, the hollow panel 14 must
It is desirable to install the cavity 16 in a state where it extends horizontally. However, as in the sixth to eighth embodiments of FIGS.
If the front end of the opening is closed and a closed panel is used, the convection of the air inside can be completely prevented, even when used vertically, as well as in horizontal use, and higher heat insulation Can be exhibited.

Further, as the synthetic resin damping board 17, a plurality of such synthetic resin corrugated cardboard-shaped hollow panels 14 are superposed and joined to each other with an adhesive or the like to constitute a rigid synthetic resin damping board. Therefore, the heat insulating effect of one hollow panel 14 is synergistic, and a very high heat insulating effect can be obtained.

In the form of the floor slab 4, if the strength and rigidity are increased by increasing the number of combinations of the hollow panels 14, for example,
The underground beams 3 may have a continuous shape with no joint at the span of the underground beams 3.
Can be omitted.

Further, by cutting and assembling the weir plate 17 at a factory or the like, then carrying it into the site and setting it, further labor savings can be achieved.

[0037]

As described above, the cast mold for a reinforced concrete structure according to the present invention is lightweight and easy to assemble when the mold removal work is reduced or eliminated as the cast mold. It is also possible to cope with slag that occurs during concrete casting, and it is also easy to drill holes and the like, so that labor saving in construction can be realized.

Furthermore, since it has heat insulating properties, it can be used as a driving heat insulating material, and can improve the heat insulating properties of the outer wall and the like and the function of preventing dew condensation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a scrap frame for a reinforced concrete structure according to the present invention.

FIG. 2 is a perspective view showing a second embodiment of a scrap frame for a reinforced concrete structure according to the present invention.

FIG. 3 is a front view of the second embodiment.

FIG. 4 is a perspective view of a third embodiment.

FIG. 5 is a front view of a third embodiment.

FIG. 6 is a perspective view of a fourth embodiment.

FIG. 7 is a front view of the fourth embodiment.

FIG. 8 is a perspective view of a synthetic resin cardboard hollow panel showing a fifth embodiment.

FIG. 9 is a front view of a synthetic resin cardboard hollow panel showing a fifth embodiment.

FIG. 10 is a perspective view of a synthetic resin cardboard hollow panel used in the present invention.

FIG. 11 is a front view of a synthetic resin cardboard hollow panel used in the present invention.

FIG. 12 is a perspective view showing another example of a synthetic resin cardboard hollow panel used in the present invention as a sixth embodiment.

FIG. 13 is a side view of FIG.

FIG. 14 is a perspective view showing still another example of a synthetic resin cardboard hollow panel used in the present invention as a seventh embodiment.

FIG. 15 is a side view of FIG. 14;

FIG. 16 is a perspective view showing still another example of a synthetic resin cardboard hollow panel used in the present invention as an eighth embodiment.

FIG. 17 is a side view of FIG. 16;

FIG. 18 is a vertical sectional side view showing an example of use of the disposable formwork of the present invention.

FIG. 19 is a vertical sectional side view showing a conventional example.

FIG. 20 is a vertical sectional side view showing another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Girder 2 ... Circular board 3 ... Underground beam 4 ... Floor slab 5 ... Separator 6 ... Horizontal flutter 7 ... Large pulling 8 ... Strut 9 ... Pit 10 ... Pillar 11 ... No use hole 12 ... Deck plate 13 ... Truss beam 14 ... Corrugated hollow panel made of synthetic resin 15 ... Rib 16 ... Cavity 17 ... Synthetic resin dam 18 ... Joint 19 ... Concave part 20 ... Convex part 21 ... Engagement rib 21a ... Flange 22 ... Square flutter 23 ... Closure plate 24 ... Small edge reinforcement Material 24a: Projection 25: Closure material

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshitake Kinoshita 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Masafumi Inaba 1-3-3 Moto-Akasaka, Minato-ku, Tokyo No. 8 Kashima Construction Co., Ltd. Tokyo Branch (72) Katsuhide Ishiyama 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Motoi Yamazaki, Motoichi Akasaka, Minato-ku, Tokyo 3-8, Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Yusuke Hirota 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Yukimasa Ogihara Minato-ku, Tokyo Former Akasaka 1-2-7 Kashima Construction Co., Ltd. (72) Inventor Noriyoshi Maruyama Kashima Construction Co., Ltd. JP-A 64-48959 (JP, A) JP-A 64-43145 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 9/05 E04B 1/16

Claims (5)

(57) [Claims] 1. A translucent polymer compound such as polypropylene, polycarbonate, or vinyl chloride is used as a material,
Using a transparent synthetic resin corrugated cardboard-shaped hollow panel with ribs separating the internal space and forming a number of cavities in one direction, and joining these hollow panels appropriately to form a rigid synthetic resin dam Disposal formwork for reinforced concrete structures, characterized by the following. 2. A translucent polymer compound such as polypropylene, polycarbonate, or vinyl chloride is used as a material,
Using a transparent synthetic resin corrugated cardboard-shaped hollow panel that partitions the internal space with ribs and forms a number of cavities in one direction, this hollow panel is appropriately joined to form a rigid and heat-insulating synthetic resin dam. Disposal formwork for reinforced concrete structures, characterized in that it is constructed. 3. The mold frame for a reinforced concrete structure according to claim 1, wherein concave or convex concrete joining means is formed on the hollow panel surface located on the upper surface. 4. The joint according to claim 1, wherein the hollow panels are appropriately overlapped and joined to form a rigid synthetic resin dam, and the ends are stepped to form joints for jointing. Discarded formwork for reinforced concrete structures as described. 5. The mold frame for a reinforced concrete structure according to claim 2, wherein the corrugated hollow panel made of synthetic resin is a closed hollow insulated panel having a closed end.