JP2007231686A - Permanent form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent form by which air entrapment does not occur upon placing concrete, a property of fixation to the placed concrete is improved, and framework reinforcement upon framing and stacking up the permanent forms can be achieved easily as intended. <P>SOLUTION: The permanent frame comprises a number of projections 2 which are fixed to a reinforcing material 3 buried in a concrete plate body 1 and are arranged to project from a rear surface 1a of the plate body 1. Fastening means 4 for screws are provided at least at four corners of the rear surface 1a of the plate body 1. A number of erected reinforcing bars or plate members may also be used as the projections 2. Otherwise, rod members bent into a chevron shape or a continuous wave shape may also be used. Further, as the reinforcing material 3, reinforcing bars are formed to be lattice-like in which vertical reinforcement bars and lateral reinforcement bars are preferably formed to have the same height. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, when a concrete structure is constructed, a residual formwork of the type in which the structure itself is framed as a formwork for placing concrete, and the cast concrete remains on the surface of the concrete structure after solidification. About.

  Conventionally, when constructing a concrete structure, it is framed as a formwork for placing concrete in the structure, and the cast concrete is fixed to the concrete surface after solidification and remains without removing the formwork. Residual formwork is known. When the remaining molds are framed, the remaining molds stacked and stacked side by side are connected to each other while the upper and lower and left and right connections are fixed with connecting metal fittings. As the remaining mold at this time, a concrete plate body, a reinforcing mesh embedded in the concrete plate, and an L-shaped section or a U-shaped section that sticks to the mesh and protrudes from the back surface of the plate. These channel steels are framed in a square shape.

In particular, as the remaining mold form in which the residual mold form is firmly bonded after the cast concrete is solidified to prevent the possibility of delamination, the present inventor has disclosed JP 9-26084, JP 9-237667, JP 2001. It has been proposed in -289572. Japanese Patent Laid-Open No. 9-26084 is directed to the outside of the L-shaped cross section of the grooved steel, and Japanese Patent Laid-Open No. 9-237667 has holes formed in the entire circumference of the grooved steel. In JP-A-2001-289572, a number of screw holes are formed in the flat surface of a grooved steel.
Japanese Patent Laid-Open No. 9-26084 JP-A-9-237667 JP 2001-289572 A

  However, the remaining molds of JP-A-9-26084, JP-A-9-237667, and JP-A-2001-289572 are made of grooved steel that protrudes from the back surface of the plate with a part of a L-shaped section or a U-shaped section. Since these channel steels are framed in a square shape along the outer periphery, there is a risk of creating some cavities between the solidified cast concrete and the residual formwork near the center of the plate and the channel steel. After solidifying the cast concrete, using a hammer or the like from the surface of the concrete structure and inspecting the impact sound to determine the connection state, abnormal noise is generated, and the remaining formwork is fixed. There was a problem that some fear of leaving sexual anxiety occurred.

  It is an object of the present invention to provide a remaining formwork that does not generate air trapping during concrete placement and that improves adhesion to the placement concrete.

  Another object of the present invention is to provide a residual mold which can be easily and arbitrarily strengthened when a residual mold is framed and stacked, by connecting an appropriate fixing bracket to a protrusion.

  The present invention has been made in view of the above problems. That is, the present invention is provided with a large number of protrusions that are fixed to a reinforcing material embedded in a concrete plate body and protrude from the back surface of the plate body, and A structure is provided in which screw fastening means are provided in at least four corners of the back surface. In addition, as the protrusions, a large number of reinforcing bars and plate materials may be erected, or a bar material bent into a mountain shape, or a bar material bent continuously in a wave shape. Further, as the reinforcing material, it is preferable that the reinforcing bars are formed in a lattice shape with reinforcing bars, and the vertical bars and the horizontal bars have the same height.

  A plurality of protrusions (2) projecting from the back surface (1a) of the plate body (1) while being fixed to the reinforcing material (3) embedded in the concrete plate body (1) as in claim 1. Accordingly, the protrusions (2) protruding at appropriate intervals from the entire back surface of the plate body (1) are bitten into the cast concrete to enhance integration, and it is difficult to retain air when placing the concrete. Thus, there is no possibility of occurrence of a poorly fixed portion where a cavity is generated in the vicinity of the central portion or the grooved steel, and the fixing property with the structure of the cast concrete is further improved. Therefore, the difficulty of peeling off the remaining mold is further improved. Further, by providing screw fastening means (4) at least at the four corners of the plate body (1), when the plate body (1) is framed and stacked, it can be easily connected with a connecting bracket and screws, The workability of the framework is extremely good.

  By using a reinforcing bar for the projection (2) as in claim 2, and reinforcing it, the reinforcement when the plate body (1) is framed and stacked is applied to the projection (2) as necessary. It is possible to easily reinforce arbitrarily by connecting or welding an appropriate fixing bracket and obtain the same effect as in the first aspect.

  By using a plate material for the protrusion (2) as shown in claim 3, the same effect as in claim 2 can be obtained.

  As shown in the fourth aspect, the same effect as that of the second aspect can be obtained by bending the bar as the protrusion (2) into a mountain shape.

  By projecting the protrusions (2) in a staggered manner as in claim 5, the protrusions (2) protrude from the entire back surface of the plate body (1) at substantially equal intervals. In addition to being able to further improve the adhesiveness of the plate, the reinforcement work when the plate body (1) is framed and stacked becomes easy to connect with the arbitrary projections (2), so that the work is simplified. , Work efficiency is improved.

  Since it becomes possible to drastically reduce the fixing part with the reinforcing material (3) by bending the bar material continuously as a wave shape as the protrusion (2) as in claim 6, Workability in manufacturing is improved.

  As shown in claim 7, by forming the reinforcing material (3) in a lattice pattern with vertical and horizontal streaks, the strength of the plate body (1) is improved as compared with the conventional net-like material, and the reinforcing material The size of (3) can be easily handled according to the size of the plate body (1). Further, by making the vertical and horizontal stripes the same height, it is possible to secure the same strength against the vertical and horizontal forces acting on the plate body (1). ) Is suitable for forming a thin film.

  By forming the reinforcing material (3) in a lattice shape with a plate material as shown in claim 8, since the plate material can be processed by press working, it becomes easy to process and the same effect as in claim 7 is obtained.

  FIG. 1 and FIG. 5 are diagrams showing an embodiment of the present invention, which will be described based on this figure. (1) is a plate body made of concrete, and the plate body (1) is a plate-shaped material in which concrete is solidified with a certain thickness and area. As the concrete, an appropriate amount of sand or the like is used for general Portland cement. It is often used that is solidified by mixing the aggregates of the above, or simply solidified with resin concrete or special silica cement, but the solidified concrete is impregnated and polymerized with a low-viscosity vinyl monomer, or the concrete is metalized. Short fibers may be mixed and solidified, and a low-viscosity vinyl polymer impregnated and polymerized therein may be used to significantly improve durability and mechanical strength. Further, the surface of the plate body (1) is usually formed with a cosmetic finish such as a pseudo stone to improve the appearance. However, depending on the place of use, the cosmetic finish may not be necessary, so it may not be finished. .

  (2) is a large number of protrusions that are fixed to the reinforcing material (3), which will be described later, and protruded from the back surface (1a) of the plate body (1). As the protrusions (2), reinforcing bars are used. Although it is used and standing in a staggered manner, the arrangement of the protrusions (2) is not limited to a staggered manner. (3) is a reinforcing material embedded in the plate body (1), and the reinforcing material (3) is formed in a lattice shape with vertical and horizontal bars [see FIG. 9 (a)]. The reinforcing material (3) is not limited to a reinforcing bar. (4) is a screw fastening means provided at least at the four corners of the back surface (1a) of the plate body (1). The screw fastening means (4) is a bottom for a tapping screw for attaching a screw. However, in particular, as the screw fastening means (4), the fastening means for the tapping screw used in the remaining mold of Japanese Patent Application Laid-Open No. 2005-354999, or the method of Japanese Patent Application Laid-Open No. 2005-355110, may be used. The fastening means used in the remaining mold, that is, the square fastening part side of the square mounting piece having a substantially U-shaped cross section is projected from the back surface (1a) of the plate body (1) and the square mounting part is used for a tapping screw. It is preferable to use a fastening means or the like in which a pilot hole is drilled or a nut is fixed. The number of screw fastening means (4) is determined according to the shape and size of the plate body (1).

  FIGS. 2 to 4 and FIGS. 6 to 8 show other embodiments of the present invention, which are compared with the above-described embodiments, which are a plate body (1), a reinforcing material (3), and screw fastening means. (4) is the same, but the protrusion (2) is different. That is, the protrusion (2) shown in FIGS. 2 and 6 is bent into a mountain shape with a bar, and both lower ends thereof are firmly fixed to the reinforcing material (3) by welding or wire. The projections (2) are fixed in a zigzag pattern, but the arrangement of the projections (2) is not limited to a zigzag pattern. Further, the projection (2) shown in FIG. 3 and FIG. 7 is a plate material, two holes are formed in the upper part thereof, and the lower part is fixed to the reinforcing material (3) by welding. Although this protrusion (2) is provided in a staggered pattern, the arrangement of the protrusions (2) is not limited to a staggered pattern, and the upper hole is not limited to two. The shape of the hole is not limited to a round shape. Further, the protrusion (2) shown in FIGS. 4 and 8 is obtained by continuously bending a bar material into a corrugated shape, and the lower end of the corrugated shape is fastened to the reinforcing material (3) by welding or a wire. It is stuck. The protrusions (2) are provided for each row, but the arrangement of the protrusions (2) is not limited to each row.

  FIG. 9 is a view showing the reinforcing material (3) of the present embodiment, which will be described based on this drawing. First, (a) is one in which vertical and horizontal stripes are overlapped to form a lattice, which is generally performed. Further, (b) is a case where the vertical and horizontal stripes are formed in a lattice shape with the same height, and particularly when the thickness of the plate body (1) is thin because the strength in the vertical and horizontal directions is equal. It will be suitable for. In the case of (c) and (d), a plate material and a reinforcing bar are combined to form a lattice, and in the case of (c), a number of notches such as semicircular or V-shaped are provided at the lower end of the plate material, If a reinforcing bar is arranged in the notch and is fixed appropriately, it can be easily formed. On the other hand, in the case of (d), a large number of holes can be formed in the plate material, and the reinforcing bars can be inserted through the holes and can be easily formed by fixing them appropriately. Further, in the case of (e), a plate material and a plate material are combined and formed in a lattice shape. In addition, in (c), (d) and (e) at this time, since the plate material is used, the plate material can be easily processed by pressing, and the formation of the reinforcing material (3) is efficient. It will be possible. The reinforcing material (3) is preferably an iron plate, but other metal plates or plate materials other than metal plates may be used as long as the strength can be secured.

  Next, a method of using the present invention will be described. The remaining molds of the present invention are framed and stacked in the same manner as in the prior art. At this time, the remaining molds may be connected to each other. However, if the strength of the frame is uncertain, the metal fittings are fixed to the appropriate positions of the many protrusions (2) protruding from the back surface (1a) of the plate body (1). If the frames are appropriately connected or welded to be arbitrarily reinforced, the strength of the frame can be easily ensured. Next, the ready-mixed concrete is placed in the frame and solidified. As a result, the framed residual form remains as it is on the surface of the cast concrete. At this time, since only a large number of protrusions (2) protrude from the back surface (1a) of the plate body (1), no air pockets are generated, and there is no possibility of generating some cavities as in the prior art. . Further, since each of the protrusions (2) protruding from the back surface (1a) of the plate body (1) is bitten and solidified, the adhesion between the solidified cast concrete and the plate body (1) is fixed. Therefore, if the hammering sound is used from the surface of the concrete structure after the cast concrete is solidified and you hear the impact sound, you will be able to confirm a good bonding condition and there will be almost no worry about the generation of abnormal noise. It is.

  INDUSTRIAL APPLICABILITY The present invention can be used as a cast concrete formwork and as a wall surface on the surface of a structure when constructing a concrete structure for civil engineering or architectural work.

It is a principal part expanded horizontal sectional view in which the protrusion of this embodiment lacked a part of residual mold which is a reinforcing bar. It is a principal part expanded horizontal sectional view which a part of remaining mold form which is a bar material in which the projection of this embodiment was formed in the shape of a mountain. It is a principal part expanded horizontal sectional view in which the protrusion of this embodiment lacked a part of residual mold which is a board material. It is a principal part expanded horizontal sectional view in which a part of residual mold which is a bar material in which a projection of this embodiment was formed in a continuous wave shape was missing. It is a back view from which a projection of this embodiment lacked a part of residual formwork which is a reinforcing bar. It is a back view which a part of remaining mold form which is a bar material in which the projection of this embodiment formed in the shape of a mountain is missing. It is a back view from which a projection of this embodiment lacked a part of residual formwork which is a board material. It is a back view which a part of remaining mold form which is a bar formed in the wave shape where the projection of this embodiment continues. It is explanatory drawing which shows the state by which the protrusion adhered to the various reinforcing materials of this embodiment.

Explanation of symbols

1 Plate body
1a Back 2 Projection 3 Reinforcement 4 Screw fastening means

Claims (8)

  In the concrete plate main body (1) and the remaining mold in which the reinforcing material (3) is embedded in the plate main body (1), the plate main body (1) is fixed to the reinforcing material (3). A number of protrusions (2) projecting from the back surface (1a) are provided, and screw fastening means (4) are provided at at least four corners of the back surface (1a) of the plate body (1). Residual formwork.   The residual mold according to claim 1, wherein the protrusion (2) is a reinforcing bar and is provided upright.   The residual mold according to claim 1, wherein the protrusion (2) is a plate material.   The residual mold according to claim 1, wherein the protrusion (2) is a bar, which is bent into a mountain shape.   The residual formwork according to claim 1, 2, 3 or 4, wherein the protrusions (2) protrude in a zigzag pattern.   The residual mold according to claim 1, wherein the protrusion (2) is a bar, which is continuously bent into a wave shape.   The residual formwork according to claim 1, wherein the reinforcing material (3) is a reinforcing bar, which is formed in a lattice shape, and whose vertical and horizontal bars are at the same height. Residual formwork according to claim 1, wherein the reinforcing material (3) is a plate material, which is formed in a lattice shape.