JP3021152U - Concrete formwork made by compression molding bamboo - Google Patents

Abstract

(57) [Summary] (Corrected) [Problem] To provide a concrete formwork made of compression-molded bamboo material that is lightweight, is not easily damaged, can withstand repeated use over a long period of time, and maintains accuracy even after long-term use. To do. SOLUTION: A bamboo material 6 as a material is impregnated with a melamine resin 7, and a predetermined number of the bamboo materials 6 are laminated until a finished thickness is formed so that a working surface 3 having a set shape and a set area can be formed. An edge frame 4 that is bent and connected to the back side of the entire periphery of the working surface 3 is connected to form the working surface 3 and the edge frame 4.
The outer surface of and is formed into a smooth surface, and the hard urethane resin 8
With a smooth surface layered on top of the working surface 3
The press forming is performed so that the outer angle 5 of the set angle at which the edge frame 4 and the edge frame 4 are joined can be accurately revealed.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 This invention uses bamboo strips as aggregate and impregnates or mixes them with menmin resin as a bonding agent, press-molds them, and forms hard urethane resin on the working surface of the surface and the outer surface of the peripheral edge frame. The present invention relates to a concrete form made by compression-molding a bamboo material formed by forming a mirror-like smooth surface.

[0002]

[Prior art]

 Conventionally, concrete forms such as wood, metal, particularly steel plate and aluminum plate can be mentioned.

[0003]

[Problems to be solved by the device]

 While each of the above-mentioned main concrete formwork listed above has its advantages based on the characteristics of the material, it also has its own disadvantages, which are different for each material type. Advantages of wooden relatively lightweight construction is easy. The damaged surface can be repaired. Disadvantages The workability is low, as it requires the work of applying oil to the working surface of the mold for each degree of use. High frequency of damage and damage due to being made of wood. Poor alkali resistance (cause of corrosion). Advantages of steel plate No need to form oil layer on the working surface of the mold Can be used repeatedly over a long period of time. Scratch resistance. Disadvantages Non-construction workability due to its large weight. If the work surface of the formwork is damaged, it cannot be repaired. Poor alkali resistance (cause of corrosion). Advantages of aluminum plate High workability due to its light weight. No need to form an oil layer on the mold working surface. Can be used repeatedly over a long period of time. Disadvantages Since the material is softer than steel plates, it is more susceptible to damage than steel plates. If the work surface of the formwork is damaged, it cannot be repaired. Poor alkali resistance (cause of corrosion). High price.

As described above, various concrete molds made of different materials have both advantages and disadvantages depending on the characteristics of each material. Therefore, this invention intends to provide a concrete formwork that eliminates only the above-mentioned disadvantages.

The object of the present invention is as a concrete formwork, which is lightweight and is not easily damaged, can be durable for repeated use over a long period of time, and is a compression-molded concrete of bamboo material that can maintain accuracy even after long-term use. A formwork can be provided.

[0006]

[Means for Solving the Problems]

 As a means for achieving the above object, the present invention impregnates bamboo material, which is a raw material, with a melamine resin, stacks a predetermined number of the bamboo materials until a finished set thickness is formed, and in a set shape, and A working surface having a set area can be formed, and an edge frame that is bent and connected to the back side of the entire circumference of the working surface is connected to form an outer surface between the working surface and the edge frame that is a smooth surface. It is formed by press molding so that the outside angle of the set angle at which the working surface and the outside surface of the edge frame are joined can be accurately revealed.

Further, according to the invention, a melamine resin of a set ratio is added to a set amount of a bamboo piece chip formed by crushing or cutting a bamboo material as a raw material, and the melamine resin is evenly mixed and filled in a mold. , Pressed so that the outside angle of the set angle at which the outer surface of the edge frame connected to the working surface as a concrete formwork is bent and connected to the working surface is accurately revealed. It will be.

[0008] Furthermore, a thin piece of bamboo is used as an aggregate, which is impregnated with or mixed with menmin resin as a bonding agent, which is compression-molded into a concrete formwork, and bent from the entire peripheral edge of the working surface to the back side. The outer surface of the edge frame to be connected and the working surface are laminated with a smooth skin using a hard urethane resin, and press molding is performed to accurately reveal the outer angle of the set angle at which the working surface and the edge frame are joined. It will be done.

[0009]

[Embodiment of device]

 The most important place for concrete formwork is the working surface with which fresh concrete comes into contact, and the first requirement is that this working surface is smooth.

The second requirement is that in the construction of an unspecified concrete structure, a plurality of concrete forms having a limited area are used, and the concrete forms are connected to form a concrete frame having a desired shape. Therefore, it is a requirement of the iron rule that the joints of adjacent formwork do not remain on the concrete surface.

In general, the outer angle of the outer edge of the edge frame extending from the outer periphery of the working surface of the concrete formwork to the rear surface side and the outer peripheral edge of the work surface form an accurate right angle, and two concrete formwork are joined to each other. When the two are closely joined, it is necessary not to form a groove line by the adjacent molds on the working surface. This is achieved by the structural accuracy of the formwork and the joining technique of the formwork that is manually joined by the workers.

[0012] In addition, other requirements for concrete formwork include accuracy maintenance of the formwork itself, strength, workability, durability, low price, etc. On the street.

In the concrete formwork of the present invention, a bamboo member was used as the main member, and this was used as an aggregate and a synthetic resin as a bonding agent.

As is well known, the bamboo material, which is the main member, has suitable characteristics such as corrosion resistance, toughness, and lightness of the bamboo itself that other plants do not have the general characteristics common to this bamboo material. It was decided that the main member type was selected, focusing on its characteristic features.

Further, the melamine resin as the auxiliary material has the first purpose of the bonding agent of the bamboo material, but the smoothness to be the working surface of the concrete formwork and the rear surface direction along the entire circumference of the working surface. It is also used as a surface layer agent for improving the accuracy of the outer surface of the edge frame continuous with and the outer angle at which the outer surface and the periphery of the working surface are joined.

Further, in addition to the melamine resin used as the bonding agent and the surface layer agent, a hard urethane resin is used as a further surface layer material so that a hard mirror surface can be formed on the working surface of the concrete formwork and each outer surface of the edge frame. The outer angle formed by the outer surface of the edge frame and the periphery of the action surface in the edge frame connected to the entire circumference of the action surface is also formed with high precision and hardness.

In this way, bamboo is used as the aggregate body, and Menmin resin is used as the surface layer of the concrete formwork and the surface of the edge frame and the above-mentioned aggregate and the hard urethane resin as the surface layer material. It is made into a molded product by pressing, and if the melamine resin is cured after molding and a hard urethane resin is formed on the surface layer, it can produce a concrete mold that is as good as the desired hardness by exerting the desired hardness. .

Here, the embodiment of the present invention will be described with reference to the drawings. 1 is a concrete formwork, 2 is a main part, 3 is a working surface, 4 is an edge frame, 5 is an outer corner, 6 is a bamboo material, 7 is a melamine resin. Reference numerals 8 indicate hard urethane resin layers.

[0019]

[Effect of device]

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

Since the main material of the whole concrete formwork is composed of bamboo and melamine resin, the whole is lightweight and the workability of pre-construction of concrete placing work is easy.

As the concrete formwork, its working surface may be a smooth surface formed by the melamine resin forming surface.

Further, by laminating the hard urethane resin layer on the melamine resin forming surface, a mirror-like working surface having higher hardness can be formed.

High accuracy can be realized by forming an outer angle at which the entire circumference of the working surface is joined with the outer surface of the edge frame continuous with the working surface by forming a menmin resin, and further by forming a hard urethane resin as a surface layer.

Since the bamboo material was sought for the aggregate of the concrete formwork, it has excellent corrosion resistance as a characteristic of the bamboo material, and thus can be used for a long time.

Since the contact surface of the green concrete is formed of the melamine resin layer or the hard urethane resin layer, there is an effect that the alkalinity of the concrete characteristics is not violated.

As the concrete formwork is light in weight as a whole, there is little chance of damaging the formwork during the construction work, which enables long-term repeated use.

Since the working surface is formed of the melamine resin layer or the hard urethane resin layer, it is possible to omit the oil application work as a pre-construction work.

Further, since the concrete formwork as a whole is lightweight, it is possible to further increase the strength and toughness by making the thickness of each part thicker than the conventional one.

A concrete formwork can be produced at low cost because it can be produced by molding a material in which a bamboo material and a melamine resin, or a material obtained by adding a hard urethane resin to this is formed by press working.

[Brief description of drawings]

Fig. 1 Partial perspective view showing the inside by cutting out a part of the concrete formwork of the present invention, Fig. 2 Partial enlarged sectional view of the concrete formwork, and Fig. 3 Part of the concrete formwork in which a hard urethane resin layer is laminated and formed. Enlarged sectional view.

[Explanation of symbols]

 1 concrete formwork, 2 main part, 3 working surface, 4 edge frame, 5 outside corner, 6 bamboo material, 7 melamine resin, 8 hard urethane resin layer.

Claims (3)

[Scope of utility model registration request] 1. A bamboo material 6 as a raw material is impregnated with a melamine resin 7, and a predetermined number of the bamboo materials 6 are laminated until a finished thickness is formed, and a working surface 3 having a predetermined shape and a predetermined area is formed.
Is formed, and the edge frame 4 is bent to the back side from the entire peripheral edge of the working surface 3 to form a connection.
The outer surfaces of the edge frame 4 and the edge frame 4 are formed into a smooth surface, and the outer surface of the edge frame 4 and the outer surface of the edge frame 4 are press-molded so as to accurately reveal the outer angle 5 of the set angle. Concrete formwork made by compression molding bamboo material. 2. A formwork is prepared by adding a melamine resin 7 in a set ratio to a set amount of a bamboo piece chip formed by crushing or cutting a bamboo material 5 as a material, and uniformly mixing the melamine resin 7 into a mold. Working surface 3 as concrete formwork 1 Outer surface of edge frame 4 bent and connected to the back side from the entire circumference end portion and the working surface 3
Concrete formwork made by compression molding of bamboo material, which is press-molded so that the outer angle 5 of the set angle to be joined with can be accurately revealed. 3. A thin piece of bamboo is used as an aggregate, and a concrete form is impregnated with or mixed with a menmin resin as a bonding agent. The concrete form is compression-molded and bent from the entire periphery of the working surface 3 to the back side. The outer surface of the edge frame 4 to be connected and the working surface 3 are laminated with a smooth skin using a hard urethane resin 8, and the outer angle 5 of the set angle at which the working surface 3 and the edge frame 4 are joined is accurately revealed. Concrete formwork made by compression molding bamboo material, which is press-molded so that it can be taken out.