JP3001112U - Concrete formwork - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a concrete formwork which is excellent in strength, durability, etc., is lightweight and inexpensive, and can be easily manufactured. [Structure] A concrete formwork A including a weir board 1, a frame body 2 and a corrugated material 3, wherein the weir board 1, the frame body 2 and the corrugated material 3 are a mixture material 4 in which a bamboo chip is mixed with an adhesive. Is integrally formed by press molding. Therefore, the concrete form A is excellent in strength, durability, etc., lightweight, inexpensive and easy to manufacture.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete formwork. More specifically, it relates to a concrete formwork that has sufficient strength, is lightweight, and is easy to handle.

[0002]

[Prior art]

 As shown in FIG. 7, most conventional concrete formwork is manufactured by nailing a dam 51 to one side of a frame body 51 to which a sandwich material 53 is nailed and attached in the middle part. . And, it is common that a plurality of concrete forms are assembled by nailing.

[0003]

[Problems to be solved by the device]

 However, this concrete formwork construction and the assembly of multiple concrete formworks were mainly done by temporary frame carpenters, but because the number of temporary frame carpenters has decreased due to the aging of the population and the successor has not grown, it has been Currently, it is very difficult to make concrete formwork and to assemble multiple concrete formwork.

At the present time, when forest resources in Japan become scarce, plywood made of South Sea timber is often used for concrete formwork, but the use of South Sea lumber has the following problems. Due to the rapid increase of environmental awareness and the balance of the earth's ecosystem, it is difficult to cut the South Sea timber. Also, in connection with the above, the price of South Sea timber has skyrocketed, and it is expected that the high price will continue in the future. Plywood used for concrete formwork has a large impact on the environment because it is old and often uses large logs. Moreover, since the yield of input raw wood is only about 70% and there is much waste, it is far from effective use of forest resources.

Therefore, it is expected that it will be more and more difficult to use South Sea wood as a material for plywood for concrete formwork. Furthermore, after the concrete formwork is used, it is common to remove dirt and adhering substances from the surface of the dam 51 for the next use. This is one of the causes of the reduced efficiency of frame work.

In view of such circumstances, an object of the present invention is to provide a concrete formwork which is excellent in strength, durability and the like, is lightweight and inexpensive, and can be easily manufactured.

[0007]

[Means for Solving the Problems]

 The concrete formwork of the present invention is a concrete formwork having a weir board, a frame body and a sand material, and the weir board, the frame body and the sand material are a mixed material in which an adhesive is mixed with chips of bamboo. It is characterized by being integrally molded by press molding. The "chip" referred to in the present invention is a concept that includes a bamboo material crushed into small pieces or minute pieces, and an extremely finely crushed bamboo shape.

[0008]

[Action]

 In the present invention, since the dam, the frame and the corrugated material are integrally molded by press molding, it is possible to easily manufacture a concrete formwork of any size and shape without the need for nailing. In addition, since the weir board, the frame and the corrugated wood are made by integrally molding a mixed material in which an adhesive is mixed with bamboo chips, it has sufficient strength and durability, is lightweight, and is inexpensive. It can be manufactured.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 is a perspective view of a concrete form A according to the first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. As shown in FIG. 1, the concrete form A is composed of a weir board 1, a frame body 2 and a corrugated material 3.

A plurality of connecting vertical small holes 21 are formed on both sides of the frame body 2 in the horizontal direction (longitudinal direction), and a plurality of connecting horizontal small holes 22 are formed on both sides of the vertical direction (shorter direction). Has been formed. In this embodiment, in the frame 2 having a length of 1,000 mm × width of 2,000 mm × thickness of 45 mm, three vertical small holes 21 for connection are formed on both sides in the horizontal direction, and the vertical small holes 21 are formed on both sides in the vertical direction. Although two connecting horizontal small holes 22 are formed, the numbers of the connecting vertical small holes 21 and the connecting horizontal small holes 22 can be freely set according to the size of the frame body 2. Further, the forming positions of the connecting vertical small holes 21 and the connecting horizontal small holes 22 can be freely set, but as will be described later, stabilization is achieved when a plurality of formwork A is connected vertically and horizontally. It is preferable to form it at a position where it can be achieved. Further, the vertical small holes 21 and the horizontal small holes 22 for connection of the concrete form A are not always necessary, and the forms can be connected in the same manner as the conventional concrete form (see FIG. 7). . That is, it is only necessary to connect the form frames A to each other by nailing or the like, but from the viewpoint of improving the efficiency of the form work, as in the present embodiment, the connecting vertical small holes 21 and the horizontal small holes 22 are formed. Is preferably formed.

As shown in FIG. 2, the dam 1, the frame 2 and the corrugated material 3 constituting the concrete form A are integrally formed by press molding a mixed material 4 in which a chip of bamboo is mixed with an adhesive. It was done. Bamboo chips are obtained by pulverizing or pulverizing bamboo into chips, and processing them into small pieces, minute pieces, or cotton. A known chipper or other processing device is appropriately used for pulverizing the bamboo material. The adhesive may be any adhesive, resin or the like as long as it can bond the bamboo chips to each other. For example, a urethane adhesive can be used. Then, the mixed material 4 in which the adhesive is mixed in the bamboo chips is filled in a mold of a predetermined shape and integrally molded by press molding at high temperature and high pressure to produce a concrete form A.

The size of the concrete form A can be set freely according to the size of the mold used at this time.

Next, a method for assembling a large-scale concrete form using a plurality of concrete forms A will be described. As shown in FIG. 3, the vertical and horizontal concrete form A is brought into contact with each other, and the vertical small holes 21 for connection and the horizontal small hole 22 for connection are respectively made to communicate with each other between the adjacent concrete form A's so that they are connected. The vertical small hole pin 23 is fitted in the vertical small hole 21 and the horizontal small hole pin 24 is fitted in the communicating horizontal small hole 22 to complete the assembly. The vertical small hole pin 23 and the horizontal small hole pin 24 are rod-shaped members whose surface is slightly tapered, but it is not always necessary to form a taper on the surface. However, in order to facilitate the fitting into and removal from the vertical small holes 21 and the horizontal small holes 22, it is preferable that the surface has a taper. Further, the vertical small hole pin 23 and the horizontal small hole pin 24 can be made of any material as long as they can connect the adjacent concrete formworks A to each other. Considering that a large pressure is applied to, it is preferable to use a material having a large shear stress.

As described above, the following effects can be obtained by using the concrete form A of this embodiment. Since bamboo chips are used as the main material, the material is homogeneous and less likely to deform, and sufficient strength and durability can be obtained, so that a large concrete formwork can be easily manufactured. Since the weir board 1 is one piece, the finish of the concrete placing surface is beautiful. Bamboo fibers provide sufficient strength even if the thickness is thin, and the weight can be reduced, making it extremely easy to handle. For example, the strength of a concrete formwork 6 having a thickness of 6 mm is almost equal to that of a conventional concrete formwork using plywood having a thickness of 12 mm. Since it is possible to assemble and dismantle a plurality of concrete formwork only with the vertical small hole pin 23 and the horizontal small hole pin 24, it is possible to greatly improve the efficiency of the assembling and dismantling work of the formwork. In addition, since no nails are used, it has a beautiful appearance. Bamboo grows in a short period of time, so a stable supply is possible and price fluctuations are small, so it is possible to mass-produce concrete form A. Therefore, an inexpensive concrete form A can be manufactured. Since the concrete form A is made of bamboo as a main material and does not easily rot, it can be easily recycled by crushing when it is no longer needed, so effective use of resources can be achieved. Since all of the bamboo material can be used as bamboo chips, there is no waste.

Second Embodiment FIG. 4 is a perspective view of a concrete form B according to a second embodiment, which is another embodiment of the present invention. The concrete form B, like the concrete form A of the first embodiment, is composed of a weir board 1, a frame body 2 and a corrugated material 3, and the surface of the weir board 1 is substantially along the longitudinal direction. While being bent at a right angle, a concave groove 11 having a roundness is formed inside the bent corner along the lateral direction. Then, a convex portion is formed around the outer side of the concave groove 11 so that the thickness around the concave groove 11 is substantially the same as the thickness of other portions of the concrete form B. The rest of the configuration is substantially the same as that of the first embodiment shown in FIG. 1, so the same reference numerals are given to the same portions and the description thereof will be omitted. Further, as in the concrete form B, a mixture material in which an adhesive is mixed with bamboo chips is used as in the concrete form A of the first embodiment (see FIG. 2).

Third Embodiment FIG. 5 is a perspective view of a concrete form C according to a third embodiment of the present invention, which is still another embodiment. The concrete form C, like the concrete form A of the first embodiment, is composed of a weir board 1, a frame body 2 and a corrugated material 3, and a transverse direction is provided at a substantially central portion on the surface of the weir board 1. A semicircular concave groove 12 is formed along the groove. A convex portion is formed around the outer side of the concave groove 12 so that the thickness of the circumference of the concave groove 12 is substantially the same as the thickness of other portions of the concrete form C. The rest of the configuration is substantially the same as that of the first embodiment of FIG. 1, so the same reference numerals are given to the same portions and the description thereof will be omitted. Further, as in the case of the concrete form A of the first embodiment, the mixed material is used for the concrete form C. In addition to the concrete form B of the second embodiment and the concrete form C of the third embodiment, the shape of the weir board 1 portion can be freely set.

Next, a case where the concrete form A of the first embodiment, the concrete form B of the second embodiment and the concrete form C of the third embodiment are used in combination will be described. For example, as shown in FIG. 6, a formwork used when constructing a building M in which a rounded portion 14 is formed at a corner and a semicircular convex portion 15 is formed at an intermediate portion will be described. First, concrete form A is used for flat parts, concrete form B is used for corner roundness 14 formation, and concrete form B is used for semi-circular convex part 15 formation in the middle part. Use frame C. That is, the form A and the form C are respectively brought into contact with both sides of the form B, and the connecting horizontal small holes 22 are made to communicate between the form A and the form B and between the form B and the form C, respectively. When the horizontal small hole pins 24 are fitted in the communicating small horizontal holes 22, the molds A, B and C can be assembled laterally. Further, when the mold B is brought into contact with the mold B, the connecting vertical small holes 21 are communicated between the molds B, and the vertical small hole pins 23 are fitted into the communicating vertical small holes 21, whereby the mold is formed. The frame B can be assembled in the vertical direction (height direction). The form A and the form C can be similarly assembled in the vertical direction.

As described above, when the concrete forms A, B and C are used in combination, the following effects are obtained in addition to the effects obtained when the concrete forms A of the first embodiment are used. . In addition to conventional structures with rounded corners, it is possible to create structures with rounded corners and semi-circular convex parts in the middle, so it is also beautiful in appearance. You can easily build rich buildings. A building with rounded corners produces very high wind noise in strong winds, but a building with rounded corners has less wind resistance, so the wind noise can be suppressed, so there is more wind. It is particularly convenient for the area. When using concrete forms A, B, and C, since the concrete placing work can be performed with the window frame incorporated, the construction can be performed faster and more easily than the conventional post-welding method. Therefore, the second half can be shortened and the construction cost can be reduced.

Next, a method of using the concrete form A will be described. First, a mold of a predetermined size is assembled with the surface of the dam 1 of the concrete form A covered with vinyl. Next, concrete is poured, and after the concrete is solidified, the concrete form A is removed. Finally, vinyl is removed from the surface of the dam 1 of the concrete form A.

In the above example, vinyl was used to cover the surface of the weir board 1. However, the surface of the weir board 1 can be covered, moisture and the like cannot pass through, and the concrete form A can be easily used. Anything that can be removed can be used.

As described above, when the surface of the weir board 1 of the concrete formwork A is covered with vinyl, the surface of the weirboard board 1 of the concrete formwork A may become dirty or adhered to the surface. Since it does not require any cleaning after using the concrete form A, it is light and easy to handle because the form does not absorb water, which greatly improves the efficiency of form dismantling work. The cost can be improved and the construction cost can be reduced. The same applies to the concrete forms B and C.

[0022]

[Effect of device]

 According to the present invention, it is possible to provide a concrete mold which is excellent in strength, durability and the like, is lightweight and inexpensive, and is easy to manufacture.

[Brief description of drawings]

FIG. 1 is a perspective view of a concrete form A according to an embodiment (first embodiment) of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view when a large-scale concrete formwork is assembled using a plurality of concrete formworks A.

FIG. 4 is a perspective view of a concrete formwork B according to another embodiment (second embodiment) of the present invention.

FIG. 5 is a perspective view of a concrete formwork C according to still another embodiment (third embodiment) of the present invention.

FIG. 6 is a cross-sectional view of a state of use when concrete forms A, B and C are used in combination.

FIG. 7 is a perspective view of a conventional concrete formwork.

[Explanation of symbols]

A concrete formwork B concrete formwork C
Concrete formwork 1 Weir board 2 Frame body 3
Sansa 4 Mixed material

Claims (1)

[Scope of utility model registration request] 1. A concrete formwork provided with a weir board, a frame and a corrugated material, wherein the weir board, the frame body and the corrugated material are integrally formed by press-molding a mixed material in which an adhesive is mixed with bamboo chips. Concrete formwork characterized by being molded.