JP2004042610A - Method for molding frp molded product, frp molded product, skin plate of water gate flap, beam of water gate flap, gusset plate of water gate flap, water gate flap, gate sheet of water gate, product for channel/river/lake/seashore or its component, pedestrian overpass or its component and stepboard of supervision bridge or pedestrian overpass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve strength of an FRP molded product and reduce its molding time by increasing a molding pressure and a molding temperature in the hand lay up method. <P>SOLUTION: In this molding method, the processes of the hand lay up method are carried out after preparing molds (S1 to S4). After laying glass cloth in the mold (S5), unsaturated polyester resin and hardening accelerator are poured into the mold. An operator repeatedly levels the surface of the unsaturated polyester resin and hardening accelerator by means of a coating roll (S6) until the laminated body has the required thickness. After laying a glass mat on the laminated body (S7), unsaturated polyester resin and hardening accelerator are poured into the mold. The operator repeatedly levels the surface of the unsaturated polyester resin and hardening accelerator by means of a coating roll (S8) until the laminated body has the required thickness. A press machine having an electric heater is put on the laminated body. The laminated body is pressed by means of the press machine under the pressure of about 50 kgf/cm<SP>2</SP>while heating the laminated body so as to be about 140 °C (S9). As a result, the laminated body becomes denser because the air within the laminated body is pushed out, and the FRP molded product having higher strength is obtained by being heated at a high temperature. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of forming an FRP (fiber reinforced plastic) molded product by a hand lay-up method which is excellent in strength at a low cost, and a FRP including a plate girder type water gate door body formed by processing the molded FRP molded product. Products, skins for doors of gates, girder materials, gusset plates, door stops for gates, and other products for waterways, rivers, lakes, shores and coastal areas (management bridges and their parts, screens, screens for dust collectors, The present invention relates to a dust remover frame, a dust remover girder, a dust remover rake, a dust remover dust plate, a dust remover, a dust chute, a belt conveyor girder, etc.) and a footbridge.
[0002]
[Prior art]
[Patent Document 1] JP-A-8-25395
[Patent Document 2] JP-A-2000-176953
As a method for forming an FRP molded body, a hand lay-up method in which a worker manually laminates a fiber material such as a glass cloth or the like and a thermosetting resin by using an application roll while alternately putting them in a mold, is disclosed in Patent Document 1. A continuous molding method in which the fiber mat described is impregnated with resin while being heated and cured through a mold and a heating furnace. The fiber mat is aligned with the metal mold using a metal mold and a press described in Patent Document 2. There are various molding methods, such as a heat-press molding method in which a resin is cut and set, and a resin is flown thereon and pressurized.
[0003]
On the other hand, in recent years, doors of sluice gates for opening and closing waterways such as rivers have been made of FRP molded bodies. In the continuous forming method, it is difficult to form a door body reinforced with a complicated girder material, and the equipment cost is large and the cost is high. According to the heat and pressure molding method, a door body with a complicated girder material can be formed, and a number of products of uniform quality can be obtained. A variety of different sizes and shapes are required depending on the size. In the heat and pressure molding method, one expensive mold must be prepared to produce one door, and it is practically impossible to carry out the method.
[0004]
On the other hand, in the hand lay-up method, the mold material is inexpensive and the size of the molded product is not limited. Therefore, it is suitable for plate girder type gate doors made by combining skin plates, multiple girder materials and multiple gusset plates, and suitable for high-mix low-volume production of various gates with different sizes and shapes. .
[0005]
[Problems to be solved by the invention]
However, the hand lay-up method is a method in which a worker alternately laminates a fiber sheet and a resin with an application roll, so that no pressure is applied to the FRP molded body, voids are generated inside, and the strength of the product is inferior in terms of product strength. There is a drawback. Further, there is a problem that the curing speed is slow due to the low molding temperature (normal temperature to 50 ° C.), and the molding time is long.
[0006]
Therefore, the present invention provides a method of forming a FRP molded article, a FRP product and a door of a floodgate, which can improve the molded article strength and shorten the molding time by increasing the molding pressure and temperature in the hand lay-up method. An object of the present invention is to provide a skin plate of a body, a girder material of a door of a floodgate, a gusset plate of a door of a floodgate, a door of a floodgate, and a door stop of a floodgate.
[0007]
In addition, in recent years, such as the gate body and its parts and door stop of the floodgate, a management bridge for crossing to the installation position of the switch for opening and closing the floodgate, a screen for damming the dirt of the waterway / river, and the dust accumulated on the screen Of a waterway, a river, a lake, a shore, a coastal product, and a pedestrian bridge as an overpass on a road, such as a dust remover that scoops up garbage and a belt conveyor that conveys the garbage that has been scooped up by the dust remover to a predetermined dust chute. There is a growing demand for weight reduction and cost reduction.
[0008]
Therefore, the present invention is to manufacture these products for waterways, rivers, lakes, shores and shores by using FRP mainly made of carbon fiber with superior strength, and to manufacture these products for waterways, rivers, lakes, shores and shores. It is another object of the present invention to further improve the strength of a product or its parts, and to reduce the weight and cost.
[0009]
[Means for Solving the Problems]
The method for molding an FRP molded article according to the invention of claim 1 is a method for molding an FRP molded article by a hand lay-up method, wherein a step of assembling a mold, and a step of applying a release agent to an inner surface of the mold, A step of applying a gel coat from above the release agent on the inner surface of the mold, a step of heating and curing the gel coat by a heating means provided below the mold, and a step of applying a fiber cloth and / or a fiber mat to the gel coat. And a step of applying the thermosetting resin from above the fiber cloth and / or fiber mat with an application roll, and applying the heating means to the thermosetting resin in a range of approximately normal temperature to 50 ° C. A step of repeating the procedure of curing at a low temperature until the molded body reaches a predetermined height, and installing a pressing means having a second heating means on the upper surface of the molded body, Heating the compact at a high temperature in the range of approximately 50 ° C. to 140 ° C. by the heating means and the second heating means while removing air from the compact and cooling the compact. And then releasing the mold from the mold.
[0010]
Here, the “fiber” includes glass fiber, carbon fiber, and the like.
[0011]
According to such a molding method, since the laminated compacts are compressed by the pressurizing means, the internal air is released, and the compact having few voids is obtained. At the same time, since the molded body is heated at a high temperature in the range of approximately 50 ° C. to 140 ° C. by the heating means and the second heating means, the curing speed is accelerated, the strength of the molded body is further increased, and the molding cycle is shortened. Thus, the number of moldings per hour can be increased, leading to cost reduction.
[0012]
As described above, in the hand lay-up method, by increasing the molding pressure and molding temperature, an FRP molded body molding method capable of improving the molded body strength and shortening the molding time can be achieved.
[0013]
According to a second aspect of the present invention, in the method of the first aspect, the pressure applied by the pressing means is approximately 10 to 50 kgf / cm. ² Is in the range of
[0014]
If the pressing force applied simultaneously with the heating by the pressurizing means is too small, it has no effect, and if it is too large, the structure of the molded body which has been hardened to some extent will be destroyed. As a result of experiments conducted by the inventor, the pressure was set to 10 to 50 kgf / cm during heating at a high temperature of 50 to 140 ° C. ² It has been found that the most effective method is to bleed air from the inside of the molded article, reduce the voids, and improve the strength of the molded article.
[0015]
Thus, in the hand lay-up method, the molding pressure is set to 10 to 50 kgf / cm. ² Within this range, a method for molding an FRP molded article can be achieved in which the density of the molded article can be increased and the strength of the molded article can be improved.
[0016]
An FRP product according to a third aspect of the present invention is obtained by processing an FRP molded product molded by the FRP molded product molding method according to the first or second aspect.
[0017]
The FRP molded article molded by the method for molding an FRP molded article according to claim 1 or 2 has a small number of voids, has high strength, and can be manufactured at low cost. Therefore, by processing one or more FRP molded bodies by cutting, cutting, bonding, assembling, bolting, etc., a high-strength, low-cost FRP product can be obtained. Furthermore, the cost is lower because the mold is inexpensive due to the nature of the hand lay-up method.
[0018]
The skin plate of the door body of the sluice gate according to the invention of claim 4, wherein the mold of the skin plate is assembled, a release material is applied, and a gel coat is applied and heated and cured to form a fiber cloth and / or a fiber mat. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² Is formed by applying a pressure in the range described above to a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0019]
As a result, the laminated compact is compressed with an appropriate pressing force, so that the inside air escapes to form a skin plate with few voids, and at the same time, the compact is heated at a high temperature in the range of approximately 50 ° C to 140 ° C. In addition, the curing speed is promoted, the strength of the molded body is further increased, and the molding cycle is shortened, so that the number of moldings per hour can be increased, leading to a reduction in the cost of the skin plate. In addition, by improving the strength of the skin plate, the thickness can be reduced, and the number of girders for reinforcement can be reduced. This reduces the weight and cost of the entire door body and simplifies the manufacturing process. Will be possible.
[0020]
The girder material of the door body of the floodgate according to the invention of claim 5 is a method of assembling a girder material, applying a release material, further applying a gel coat, curing by heating, and forming a fiber cloth and / or a fiber mat. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape, and evacuating air in the molded body and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0021]
Accordingly, the girder material is compressed with an appropriate pressing force and has a small number of voids and high strength and can be reduced in cost, so that the number of girder materials for reinforcing the skin plate can be reduced.
[0022]
The gusset plate of the sluice door according to the invention of claim 6, wherein the mold of the gusset plate is assembled, a release material is applied, a gel coat is applied, and the gel is heated and cured, and the fiber cloth and / or fiber mat is formed. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0023]
The gusset plate is a member that is further reinforced from above to prevent the skin plate reinforced with the girder material from being twisted or distorted, pasted on the girder material, and penetrated to the skin plate with bolts and tightened Also, there is a method of preventing distortion by bolting from above the beam at the four corners of the skin plate.
[0024]
This gusset plate also compresses the laminated compact with an appropriate pressing force, so that the air inside escapes to form a gusset plate with few voids, and at the same time, the compact is heated at a high temperature in the range of approximately 50 ° C to 140 ° C. Therefore, the curing speed is accelerated, the strength of the molded body is further increased, and the molding cycle is shortened, and the number of moldings per hour can be increased, which leads to the cost reduction of the gusset plate. In addition, by improving the strength of the gusset plate, the thickness can be reduced and the number of girders for reinforcement can be reduced, so that the weight and cost of the entire door body and the manufacturing process can be simplified. Will be possible.
[0025]
According to a seventh aspect of the present invention, there is provided a door body of a floodgate, wherein a plurality of girder members of the door body of the floodgate and a plurality of gusset plates of the door body of the sixth aspect are provided, and a skin of the floodgate door body of the fourth aspect. It was made by assembling it on a plate.
[0026]
Thus, since each member has high strength, thinness, and low cost, the entirety of the door of the floodgate manufactured by combining these members can also be made high in strength, light in weight, and low in cost.
[0027]
The door stop of the sluice gate according to the invention of claim 8, assembling a mold of a component of the door stop, applying a release material, further applying a gel coat, heating and curing the fiber cloth and / or the fiber mat. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape and bleeding air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0028]
The door stop of the sluice gate consists of a groove-like member into which both ends of the sluice door body fits and a bottom surface where the lower surface of the door body is in close contact, and serves as a guide groove when the door body moves up and down. When it comes, it will block the flow of water together with the door. Note that rubber is attached to a surface of the door body that contacts the door stop to prevent water leakage.
[0029]
Since this door stop is also formed in the same manner as each member of the door body, it is similarly high in strength, thin, and low in cost.
[0030]
The skin plate of the gate of the sluice, the girder material of the sluice door, the gusset plate of the sluice door, or the door stop of the sluice according to the invention of claim 9, wherein carbon fiber, thermosetting resin, curing accelerator, It is made of a carbon fiber reinforced plastic molded article molded using additives and pigments.
[0031]
Here, as the thermosetting resin, an unsaturated polyester resin, an epoxy resin, a polyvinyl ester resin, or the like is used.
[0032]
Carbon fiber reinforced plastic (hereinafter also referred to as “CFRP”) has a remarkably high strength among FRPs. Therefore, in order to have the same strength in design as compared with FRP using only glass fiber, CFRP is halved. And only 2/3 of the thickness, and the weight can be reduced accordingly. In addition, carbon fiber is more expensive than glass fiber, but it can be used in about half the amount, and the gate body of the gate, which is a combination of the skin plate, girder material and gusset plate of the gate, is lighter, and the door is opened and closed. Since the capacity of the apparatus can be set to a low load and the construction can be facilitated, the cost can be reduced as a whole. Furthermore, it is more advantageous in terms of weight compared to conventional iron gates and door stops of iron gates, has excellent corrosion resistance without rusting, can be used for a long time, and has some scratches. The paint does not peel off as in the case of iron, and the appearance is unchanged because the pigment is uniformly dispersed.
[0033]
In this way, the sluice door body skin plate, sluice door body girder, sluice door body gusset plate, or sluice door stop is made of stronger carbon fiber reinforced plastic (CFRP). By manufacturing, the strength can be further improved, and the weight and cost can be reduced.
[0034]
The method for forming the CFRP molded body is not limited to the hand lay-up method, but may be any method such as a continuous molding method or a heat and pressure molding method.
[0035]
The skin plate of the gate of the sluice, the girder material of the gate of the sluice, the gusset plate of the sluice door, or the door stop of the sluice according to the invention of claim 10 is made of carbon fiber, glass fiber, thermosetting resin, cured It consists of a hybrid reinforced plastic formed using accelerators, additives and pigments.
[0036]
Hybrid reinforced plastic (hereinafter also referred to as “HBRP”) is an FRP using carbon fiber and glass fiber mixed at an appropriate ratio, and is inferior in strength to carbon fiber reinforced plastic, but is glass fiber reinforced plastic. More excellent in strength. When the proportion of carbon fiber is increased, the strength is improved but the cost is increased. When the proportion of glass fiber is increased, the strength is reduced but the cost can be reduced. Therefore, by adjusting the mixing ratio of the carbon fiber and the glass fiber and the amount of use, it is possible to finely set the strength and find an appropriate product price.
[0037]
In this way, the production of these lock door body skin plates, lock gate body girders, lock gate body gusset plates, or lock door stops with hybrid reinforced plastic (HBRP) is subtle. It is possible to set an appropriate strength and find an appropriate product price.
[0038]
The method for forming the HBRP molded body is not limited to the hand lay-up method, but may be any method such as a continuous molding method or a heat and pressure molding method.
[0039]
The skin plate, the girder material, the gusset plate, or the door stop of the gate of the flood gate according to the invention of claim 11, Assembling the mold, applying a release material, further applying a gel coat, heating and curing, and placing a carbon fiber cloth and / or a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber flake on the gel coat. Laminate and apply the thermosetting resin over the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake, and heat the thermosetting resin at about room temperature to 50 ° C. By repeating the curing at a low temperature in the range, the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber By laminating a yarn and / or carbon fiber flakes and a thermosetting resin to form a molded body, it substantially 10～50Kgf / cm ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0040]
As described above, in the production of the CFRP molded body by the hand lay-up method, by applying pressure at an appropriate pressure, the internal air is released and the molded body has few voids. At the same time, since the molded body is heated at a high temperature in the range of approximately 50 ° C. to 140 ° C., the curing speed is accelerated, the strength of the molded body is increased, and the molding cycle is shortened to increase the number of moldings per hour. Can lead to lower costs.
[0041]
In this way, in the hand lay-up method, by increasing the molding pressure and molding temperature, it is possible to improve the strength of the molded body and shorten the molding time, and together with the advantages of the CFRP molded body, By manufacturing the skin plate of the door body, the girder material, the gusset plate, or the door stop of the floodgate, the strength can be further improved, and the weight and cost can be reduced.
[0042]
A skin plate, a girder material, a gusset plate, or a door stop of the gate of the flood gate according to the invention of claim 12, Assembling the mold, applying a release material, further applying a gel coat, heating and curing, and placing a carbon fiber cloth and / or a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber flake on the gel coat. Laminate and apply a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake. Cured at a low temperature to form a glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or glass fiber flake. Laminate on the curable resin, apply the thermosetting resin on the glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or glass fiber flake, and set the thermosetting resin at approximately room temperature. The carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber flake and the thermosetting resin are repeatedly cured at a low temperature in the range of ５０50 ° C. to a predetermined height. And a glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake are laminated to form a molded body, and about 10 to 50 kgf / cm ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0043]
In this way, the HBRP molded article of the present invention is formed by laminating carbon fiber, thermosetting resin, glass fiber, and thermosetting resin in this order, and increasing the molding pressure and molding temperature in the hand lay-up method. By improving the strength of the body and shortening the molding time, it is possible to change the mixing ratio of carbon fiber and / or glass fiber, or to increase or decrease the number of layers of carbon fiber or glass fiber, thereby increasing the number of layers of the floodgate. Subtle strength settings for body skin plates, girders, gusset plates, or sluice doors are possible, and you can find the right product price.
[0044]
A skin plate, a girder material, a gusset plate, or a door stop of the gate of the flood gate according to the invention of claim 13, Assembling a mold, applying a release material, further applying a gel coat, heating and curing, laminating a hybrid cloth made of carbon fiber and glass fiber on the gel coat, and applying a thermosetting resin to the hybrid cloth. By applying from above and repeatedly curing the thermosetting resin at a low temperature in the range of approximately room temperature to 50 ° C., the hybrid cloth is laminated until a predetermined height is formed to form a molded body. 10-50kgf / cm ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0045]
In this manner, the HBRP molded article of the present invention is obtained by alternately laminating a hybrid cloth formed by braiding carbon fibers and glass fibers and a thermosetting resin, and increasing the molding pressure and the molding temperature in the hand lay-up method. By improving the strength of the molded body and shortening the molding time, by changing the mixing ratio of the carbon fiber and glass fiber in the hybrid cloth, the skin plate, the girder material, and the gusset plate of the gate body of the floodgate can be obtained. , Or the subtle strength setting of the door of the sluice can be set, and an appropriate product price can be found.
[0046]
The skin plate of the gate of the floodgate, the girder material of the gate of the floodgate, or the gusset plate of the gate of the floodgate according to the invention of claim 14 is the molding according to any one of claims 9 to 13, wherein Carbon fibers are laminated on the uppermost surface of the body, and the carbon fibers are projected on the surface.
[0047]
Aquatic plants such as algae and aquatic plants grow in parts of water such as natural waterways, rivers, lakes, shores, and ponds, but they are made up of a combination of skin plates, girders, and gusset plates made of FRP molded bodies. Algae and aquatic plants do not grow on the part of the gate body that is immersed in the water, giving the impression that the natural environment has been destroyed. Therefore, in the structure of any one of the ninth to thirteenth aspects, the inventor of the present invention stacks carbon fibers on the uppermost surface of the molded body and projects the carbon fibers on the surface, so that the carbon fibers grow with algae. I found out. As a result, algae and aquatic plants grow on the part of the gate body that is immersed in the water, and become part of natural waterways, rivers, lakes, marshes and coasts, and are environmentally friendly skin plates, girder materials, gussets Become a plate.
[0048]
In addition, the fact that the door stop of the sluice is not included in this claim 14 is that the door stop of the sluice is a portion where the door body of the sluice is fitted to open and close the water channel, and seals the water channel when a large amount of algae or the like adheres. This is because they can no longer do it.
[0049]
A sluice door according to a fifteenth aspect of the present invention is a sluice door spar member according to any one of the ninth to fourteenth aspects and the sluice gate member according to any one of the ninth to fourteenth aspects. A plurality of gusset plates of the gate of the sluice are assembled to the skin plate of the gate of the sluice according to any one of claims 9 to 14.
[0050]
This makes it possible to provide a door for a floodgate that makes use of the characteristics of each member. For example, a plurality of girder members and gusset plates of the gate of the sluice according to claim 9 and the sluice door assembled with the skin plate according to claim 9 are all made of CFRP molded bodies. In order to have the same strength in design as compared with the used FRP, the thickness is required to be half to ／, and the weight can be reduced correspondingly. In addition, carbon fiber is more expensive than glass fiber, but the amount of use can be reduced by about half, and since the door body of the water gate is lighter, the capacity of the door opening and closing device can be set to a low load, so that as a whole, Cost can be reduced.
[0051]
In addition, by using a door made of the CFRP molded body as a door of a natural opening / closing type water gate for natural drainage and natural water stoppage (prevention of backflow), the movable performance can be enhanced because the door is light, It will be a natural open / close type floodgate with excellent drainage conditions and backwater prevention. There are a flap gate (hanging type), a swing gate (horizontal opening), and a miter gate (kannon opening) as natural opening and closing type water gates.
[0052]
In addition, since a plurality of girder members and gusset plates of the gate of the water gate according to claim 10 and the door of the water gate assembled to the skin plate according to claim 10 are all made of an HBRP molded body, carbon fibers and By adjusting the mixing ratio and the amount of glass fiber used, it is possible to finely set the strength and find an appropriate product price. In addition, by using a door made of the above-described HBRP molded body as a door of a natural opening and closing type water gate for the purpose of natural drainage and natural water stoppage (prevention of backflow), it is possible to enhance the movable performance because the door is light. It will be a natural open / close type floodgate with excellent drainage conditions and backwater prevention.
[0053]
In addition, the gate body of the water gate formed by assembling a plurality of girder members and gusset plates of the door body of the water gate according to claim 11 and the skin plate according to claim 11 can be formed by a hand lay-up method using a molding pressure and a molding temperature. By increasing the strength, the strength of the molded body and the molding time can be shortened, and the strength of the skin plate, girder material, and gusset plate of the door of the floodgate can be further improved in combination with the advantages of the CFRP molded body. As a result, the weight of the door of the water gate can be further improved, and the weight and cost can be reduced. In addition, by using a door made of the CFRP molded body as a door of a natural opening / closing type water gate for natural drainage and natural water stoppage (prevention of backflow), the movable performance can be enhanced because the door is light, It will be a natural open / close type floodgate with excellent drainage conditions and backwater prevention.
[0054]
Further, a plurality of girder members and a gusset plate of the door body of the sluice according to the twelfth aspect, and the sluice door body assembled to the skin plate according to the twelfth aspect of the present invention, the molding pressure and the molding temperature in the hand lay-up method. By increasing the strength, it is possible to improve the strength of the molded body and shorten the molding time, and to change the mixing ratio of carbon fiber and / or glass fiber, or to increase or decrease the number of carbon fiber or glass fiber layers. With this, it is possible to finely set the strength of the skin plate, the girder material, and the gusset plate of the gate of the sluice. Therefore, it is possible to finely set the strength of the gate of the sluice, and to find an appropriate product price.
[0055]
In addition, by using a door made of the above-described HBRP molded body as a door of a natural opening and closing type water gate for the purpose of natural drainage and natural water stoppage (prevention of backflow), it is possible to enhance the movable performance because the door is light. It will be a natural open / close type floodgate with excellent drainage conditions and backwater prevention.
[0056]
Further, a plurality of spar members and gusset plates of the gate body of the floodgate according to claim 13 and the door body of the floodgate formed by assembling the skin plate according to claim 13 have a molding pressure and a molding temperature in the hand lay-up method. By increasing the height, it is possible to improve the strength of the molded body and shorten the molding time. By changing the mixing ratio of carbon fiber and glass fiber in the hybrid cloth, the skin plate and the girder material of the gate body of the floodgate can be obtained. Since the gusset plate can be delicately set in strength, the sluice door can be set in delicate strength, and an appropriate product price can be found.
[0057]
In addition, by using a door made of the above-described HBRP molded body as a door of a natural opening and closing type water gate for the purpose of natural drainage and natural water stoppage (prevention of backflow), it is possible to enhance the movable performance because the door is light. It will be a natural open / close type floodgate with excellent drainage conditions and backwater prevention.
[0058]
In addition, in the door body of the water gate formed by assembling a plurality of girder members and gusset plates of the door body of the water gate according to claim 14 and the skin plate according to claim 14, since the carbon fibers protrude from the surface, the water Algae, aquatic plants, etc. grow on the part immersed in the sea, and it becomes part of natural waterways, rivers, lakes, marshes and coasts, and it becomes an environmentally friendly gate of a floodgate. However, in the case of a plate girder type floodgate door, if a lot of algae etc. is attached to both ends of the skin plate which fits into the door stop and goes up and down, it will not move up and down smoothly. Not to protrude.
[0059]
Further, depending on the case, a better effect may be produced by the sluice door body in which a plurality of girder members and gusset plates of the sluice door body described in different claims are assembled to the skin plate.
[0060]
The product for waterways, rivers, lakes and shores according to the invention of claim 16 or a part thereof is a molded article of carbon fiber reinforced plastic molded using carbon fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment. It consists of
[0061]
Here, as products for waterways, rivers, lakes, marshes, and shores or parts thereof, there are management bridges for crossing to the installation position of the switchgear for opening and closing the floodgate, including the door body of the floodgate and its parts and door stop. The parts (girder, step board, etc.), the screen for damping the dirt in waterways and rivers, the dust remover that scoops up the dust accumulated on the screen and its parts (screen, frame, girder, rake, dust plate, etc.), and the scooping by the dust remover There are belt conveyor parts (girder etc.) that carry the raised dust to a predetermined dust chute.
[0062]
By manufacturing these products for waterways, rivers, lakes, shores and shores or parts thereof using carbon fiber reinforced plastic (CFRP), which is superior in strength, the strength can be further improved and the weight can be reduced, so that the construction is easy. And the cost can be reduced as a whole.
[0063]
The method for forming the CFRP molded body is not limited to the hand lay-up method, but may be any method such as a continuous molding method or a heat and pressure molding method.
[0064]
The product for waterways, rivers, lakes and shores according to the invention of claim 17 or a part thereof is a hybrid reinforced plastic molded using carbon fiber, glass fiber, thermosetting resin, curing accelerator, additive, and pigment. It consists of a molded body.
[0065]
By manufacturing the above-mentioned products for waterways, rivers, lakes, shores, and shores or parts thereof using hybrid reinforced plastic (HBRP), it is possible to finely set the strength and find an appropriate product price.
[0066]
The method for forming the HBRP molded body is not limited to the hand lay-up method, but may be any method such as a continuous molding method or a heat and pressure molding method.
[0067]
The product for waterways, rivers, lakes, shores, and shores according to the invention of claim 18 or parts thereof may be obtained by assembling molds for products for waterways, rivers, lakes, shores, or shores, applying a release material, and further applying a gel coat. Heating and curing, laminating carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake on the gel coat, and then setting the thermosetting resin to the carbon fiber cloth and / or A predetermined height is obtained by repeatedly applying a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber flake, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. Laminated carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake and thermosetting resin Body is formed, it generally 10~50kgf / cm ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape and bleeding air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0068]
As described above, in the production of the CFRP molded body by the hand lay-up method, by applying pressure at an appropriate pressure, the internal air is released and the molded body has few voids. At the same time, since the molded body is heated at a high temperature in the range of approximately 50 ° C. to 140 ° C., the curing speed is accelerated, the strength of the molded body is increased, and the molding cycle is shortened to increase the number of moldings per hour. Can lead to lower costs.
[0069]
In this way, in the hand lay-up method, by increasing the molding pressure and temperature, it is possible to improve the strength of the molded body and shorten the molding time, and together with the advantages of the CFRP molded body, By manufacturing products for rivers, lakes and shores, or parts thereof, strength can be further improved, and weight and cost can be reduced.
[0070]
The product for waterways, rivers, lakes, shores and shores or parts thereof according to the invention of claim 19 is obtained by assembling the mold of the product for waterways, rivers, lakes, shores or shores and applying a release material, and further applying a gel coat. Heating and curing, laminating carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake on the gel coat, and setting thermosetting resin to the carbon fiber cloth and / or carbon fiber The thermosetting resin is applied over a mat and / or a carbon fiber yarn and / or a carbon fiber flake, and the thermosetting resin is cured at a low temperature in a range of approximately normal temperature to 50 ° C., and the glass fiber cloth and / or the glass fiber mat and / or A glass fiber yarn and / or glass fiber flake is laminated on the thermosetting resin, and the thermosetting resin is laminated on the glass fiber cloth and And / or glass fiber mats and / or glass fiber yarns and / or glass fiber flakes are applied from above, and the thermosetting resin is repeatedly cured at a low temperature in the range of approximately normal temperature to 50 ° C. to achieve a predetermined height. Until said carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake and said thermosetting resin and said glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or Alternatively, a molded body is formed by laminating glass fiber flakes, and approximately 10 to 50 kgf / cm. ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape and bleeding air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0071]
In this way, the HBRP molded article of the present invention is formed by laminating carbon fiber, thermosetting resin, glass fiber, and thermosetting resin in this order, and increasing the molding pressure and molding temperature in the hand lay-up method. By improving the body strength and shortening the molding time, by changing the mixing ratio of carbon fiber and / or glass fiber, or by increasing or decreasing the number of carbon fiber or glass fiber layers, waterways and rivers can be improved. -It is possible to finely set the strength of products for lakes, shores and coasts or their parts, and to find appropriate product prices.
[0072]
The product for waterways, rivers, lakes, shores and shores according to the invention of claim 20 or parts thereof is obtained by assembling molds for products for waterways, rivers, lakes, shores or shores or parts thereof, applying a release material, and further applying a gel coat. Heat and cure, a hybrid cloth composed of carbon fiber and glass fiber is laminated on the gel coat, a thermosetting resin is applied from above the hybrid cloth, and the thermosetting resin is heated to a temperature of about room temperature to 50 ° C. By repeating the curing at a low temperature in the range, the hybrid cloth is laminated until a predetermined height is reached to form a molded body, and approximately 10 to 50 kgf / cm. ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape and bleeding air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0073]
In this manner, the HBRP molded article of the present invention is obtained by alternately laminating a hybrid cloth formed by braiding carbon fibers and glass fibers and a thermosetting resin, and increasing the molding pressure and the molding temperature in the hand lay-up method. By improving the strength of the molded body and shortening the molding time, and by changing the mixing ratio of carbon fiber and glass fiber in the hybrid cloth, products for waterways, rivers, lakes, marshes, shores, and parts thereof are improved. Subtle strength settings are possible, and an appropriate product price can be found.
[0074]
The pedestrian bridge according to the twenty-first aspect of the present invention or a component thereof is made of a carbon fiber reinforced plastic molded article molded using carbon fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment.
[0075]
As described above, even if a pedestrian bridge or a part thereof (a step board, a bridge girder, a column, a protective wall, a protective fence, a stair, etc., which can be walked by a person) is manufactured from the CFRP molded body, it can sufficiently bear the weight of a person. Since each component can be reduced in weight, construction is also facilitated, and the overall cost of the pedestrian bridge can be reduced. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting.
[0076]
The method for forming the CFRP molded body is not limited to the hand lay-up method, but may be any method such as a continuous molding method or a heat and pressure molding method. The pedestrian bridge according to the present invention is not limited to an overpass-type pedestrian bridge with stairs that crosses a road, but also includes, for example, a flat pedestrian bridge that crosses rivers and the like in parallel with the road (the inventions of the following claims). The same applies to pedestrian bridges.)
[0077]
The pedestrian bridge or a part thereof according to the invention of claim 22 is formed of a molded article of a hybrid reinforced plastic molded using carbon fibers, glass fibers, a thermosetting resin, a curing accelerator, an additive, and a pigment.
[0078]
As described above, even when the pedestrian bridge or its parts are manufactured from the HBRP molded body, the strength can be sufficiently endured by increasing or decreasing the mixing amount of the carbon fiber and the glass fiber and adjusting the thickness. In addition, the product becomes an appropriate product in terms of cost, and the weight of each component can be reduced, so that the construction becomes easy and the cost of the entire pedestrian bridge can be reduced. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting.
[0079]
The method for forming the HBRP molded body is not limited to the hand lay-up method, but may be any method such as a continuous molding method or a heat and pressure molding method.
[0080]
The pedestrian bridge or its parts according to the invention of claim 23, comprising assembling a mold of the pedestrian bridge or its parts, applying a release material, further applying a gel coat, curing by heating, and using a carbon fiber cloth and / or a carbon fiber mat. And / or laminating carbon fiber yarn and / or carbon fiber flakes on the gel coat, and setting the thermosetting resin to the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake. A carbon fiber cloth and / or a carbon fiber mat and / or a carbon fiber yarn are repeatedly applied from above and cured at a low temperature in the range of approximately normal temperature to 50 ° C. until the carbon fiber cloth and / or the carbon fiber mat reach a predetermined height. And / or laminating the carbon fiber flakes and the thermosetting resin to form a molded body, and about 10 to 50 kgf / cm ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0081]
By increasing the molding pressure and temperature in the hand lay-up method, the strength of the molded body can be improved and the molding time can be shortened. By manufacturing, the strength can be further improved, and each component can be made thinner, so that the weight can be further reduced, and therefore, the construction can be more easily performed, so that the overall cost of the pedestrian bridge can be further reduced. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting.
[0082]
The pedestrian bridge or a part thereof according to the invention of claim 24, comprises assembling a mold of the pedestrian bridge or a part thereof, applying a release material, further applying a gel coat, heating and curing the material, and forming a carbon fiber cloth and / or a carbon fiber mat. And / or laminating carbon fiber yarns and / or carbon fiber flakes on the gel coat, and thermosetting resin over the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarns and / or carbon fiber flakes Applying and curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C., and glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or glass fiber flakes of the thermosetting resin. Laminated on the thermosetting resin and the glass fiber cloth and / or glass fiber mat and / or glass The carbon fiber cloth and / or glass fiber flakes are repeatedly applied by applying over the fiber and / or glass fiber flakes and curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C. until a predetermined height is reached. Alternatively, a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber flake, the thermosetting resin, and the glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake are laminated and formed. Form a body, approximately 10 to 50 kgf / cm ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0083]
In this way, by laminating carbon fiber, thermosetting resin, glass fiber, and thermosetting resin in this order, and increasing the molding pressure and temperature in the hand lay-up method, the strength of the molded body is improved and the molding time is shortened. By changing the mixing ratio of carbon fiber and / or glass fiber or increasing or decreasing the number of layers of carbon fiber or glass fiber, it is possible to finely set the strength of the pedestrian bridge or its parts. And find the appropriate product price.
[0084]
A pedestrian bridge or a part thereof according to the invention of claim 25, comprises assembling a mold of the pedestrian bridge or part thereof, applying a release material, further applying a gel coat, heating and curing, and forming a hybrid cloth made of carbon fiber and glass fiber. By laminating on the gel coat, applying a thermosetting resin from above the hybrid cloth, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C., to a predetermined height. The above-mentioned hybrid cloth is laminated to form a molded body until it is approximately 10 to 50 kgf / cm. ² By applying pressure in the range described above to obtain a predetermined thickness and bleeding air from the compact, spraying gravel on the surface, and heating the compact at a high temperature in the range of approximately 50 ° C. to 140 ° C. It was done.
[0085]
As described above, by alternately laminating a hybrid cloth formed by weaving carbon fibers and glass fibers and a thermosetting resin, and increasing the molding pressure and temperature in the hand lay-up method, the strength of the molded body is improved and the molding time is increased. By changing the mixing ratio of carbon fiber and glass fiber in the hybrid cloth, it is possible to finely set the strength of the pedestrian bridge or its parts, and find an appropriate product price. it can.
[0086]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 26 is formed of carbon fiber, a thermosetting resin, a curing accelerator, an additive, a pigment, and a carbon fiber reinforced plastic having gravel embedded in a surface thereof. It consists of a body.
[0087]
As described above, even if the step board (portion where a person walks) of the management bridge or the pedestrian bridge is manufactured with the CFRP molded body, the strength can sufficiently withstand the weight of a human, but the CFRP molded body is a plastic having a smooth surface. Therefore, it is slippery and there is a danger of falling if a person walks on it. In particular, the danger is high when snow falls or freezes in winter. Therefore, the tread is prevented from falling by embedding gravel in the surface of the tread plate made of the CFRP molded body, thereby forming irregularities on the surface and making it hard to slip.
[0088]
In this way, even when the snow falls or freezes in winter, there is little risk of overturning, and there is no problem in strength, and the tread of the management bridge or pedestrian bridge is high.
[0089]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 27, is formed by using carbon fiber, glass fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment, and is a hybrid reinforced plastic having a surface embedded with gravel. Of a molded article.
[0090]
As described above, even when manufacturing a footbridge of a management bridge or a pedestrian bridge using an HBRP molded body, the thickness is adjusted by increasing or decreasing the amount of carbon fiber and glass fiber mixed, so that the weight can be sufficiently applied to human weight. Although it can withstand and is an appropriate product in terms of cost, the HBRP molded article is also slippery because of its smooth surface plastic, and there is a risk of falling when a person walks on it. In particular, the danger is high when snow falls or freezes in winter. Therefore, the tread is prevented from falling by embedding gravel in the surface of the tread plate made of the HBRP molded body, thereby forming irregularities on the surface and making it hard to slip.
[0091]
In this way, even when snowing or freezing in winter, there is little danger of falling, and there is no problem in strength, the cost is appropriate, and the tread of the management bridge or pedestrian bridge is high.
[0092]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 28, comprises assembling a mold of the step board of the management bridge or the pedestrian bridge, applying a mold release material, further applying a gel coat, heating and curing the carbon fiber cloth and / or carbon fiber cloth. A carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake is laminated on the gel coat and a thermosetting resin is applied to the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or By repeatedly applying from above carbon fiber flakes and curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C., carbon fiber cloth and / or carbon fiber mat and / or Alternatively, a molded product is formed by laminating a carbon fiber yarn and / or a carbon fiber flake and a thermosetting resin, and then a molded product is formed thereon by approximately 10 to 50. gf / cm ² By applying pressure in the range described above to obtain a predetermined thickness and bleeding air from the compact, spraying gravel on the surface, and heating the compact at a high temperature in the range of approximately 50 ° C. to 140 ° C. It was done.
[0093]
By increasing the molding pressure and temperature in the hand lay-up method as described above, it is possible to improve the strength of the molded body and shorten the molding time, and in combination with the advantages of the CFRP molded body, the management bridge or the pedestrian bridge can be used. By manufacturing the tread, the strength can be further improved, and the weight and cost can be reduced. Then, before the molded body is hardened at a high temperature in the final step of the hand lay-up method, gravel is scattered on the surface, so that the gravel is half embedded in the surface of the finished tread. As a result, irregularities are formed on the surface, making it difficult to slip, and preventing falling.
[0094]
In this way, even when snow falls or freezes in winter, there is little danger of falling, and there is no problem in strength, and it is a low-cost and highly safe step board for a management bridge or pedestrian bridge.
[0095]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 29, comprises assembling a mold of the management bridge or the pedestrian bridge, applying a release material, further applying a gel coat, heating and curing the carbon fiber cloth and / or carbon fiber cloth. A carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake is laminated on the gel coat, and a thermosetting resin is applied to the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber The thermosetting resin is applied over the flakes, and the thermosetting resin is cured at a low temperature in the range of approximately normal temperature to 50 ° C., and the glass fiber cloth and / or the glass fiber mat and / or the glass fiber yarn and / or the glass fiber flakes are heated. The thermosetting resin is laminated on the curable resin, and the thermosetting resin is mixed with the glass fiber cloth and / or the glass fiber mat and / or Or by repeatedly applying glass fiber yarn and / or glass fiber flakes on the glass fiber flakes and curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C. until the carbon fiber reaches a predetermined height. Laminate cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake, the thermosetting resin, and the glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or glass fiber flake To form a molded body, and approximately 10 to 50 kgf / cm ² By applying pressure in the range described above to obtain a predetermined thickness and bleeding air from the compact, spraying gravel on the surface, and heating the compact at a high temperature in the range of approximately 50 ° C. to 140 ° C. It was done.
[0096]
Thus, by laminating the carbon fiber, the thermosetting resin, the glass fiber, and the thermosetting resin in this order, and increasing the molding pressure and temperature in the hand lay-up method, the strength of the molded body is improved and the molding time is shortened. By changing the mixing ratio of carbon fiber and / or glass fiber or increasing or decreasing the number of layers of carbon fiber or glass fiber, the delicate strength setting of the footsteps of the management bridge or pedestrian bridge can be achieved. It will be possible to find the appropriate product price. Then, before the molded body is hardened at a high temperature in the final step of the hand lay-up method, gravel is scattered on the surface, so that the gravel is half embedded in the surface of the finished tread. As a result, irregularities are formed on the surface, making it difficult to slip, and preventing falling.
[0097]
In this way, even when snowing or freezing in winter, there is little risk of overturning, there is no problem in terms of strength, it is an appropriate product in terms of cost, and it is a high-safe management bridge or footbridge for pedestrian bridges .
[0098]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 30 is constructed by assembling a mold of the step board of the management bridge or the pedestrian bridge, applying a release material, further applying a gel coat, heating and curing the carbon fiber and the glass fiber. A hybrid cloth is laminated on the gel coat, a thermosetting resin is applied from above the hybrid cloth, and the thermosetting resin is cured at a low temperature in a range of approximately normal temperature to 50 ° C., thereby repeating a predetermined process. The hybrid cloth is laminated to a height of about 10 kgf / cm to form a molded body. ² By applying pressure in the range described above to obtain a predetermined thickness and bleeding air from the compact, spraying gravel on the surface, and heating the compact at a high temperature in the range of approximately 50 ° C. to 140 ° C. It was done.
[0099]
As described above, by alternately laminating a hybrid cloth formed by weaving carbon fibers and glass fibers and a thermosetting resin, and increasing the molding pressure and temperature in the hand lay-up method, the strength of the molded body is improved and the molding time is increased. By changing the mixing ratio of carbon fibers and glass fibers in the hybrid cloth, it is possible to finely set the strength of the footboard of the management bridge or pedestrian bridge, and find an appropriate product price be able to. Then, before the molded body is hardened at a high temperature in the final step of the hand lay-up method, gravel is scattered on the surface, so that the gravel is half embedded in the surface of the finished tread. As a result, irregularities are formed on the surface, making it difficult to slip, and preventing falling.
[0100]
In this way, even when snowing or freezing in winter, there is little risk of overturning, there is no problem in terms of strength, it is an appropriate product in terms of cost, and it is a high-safe management bridge or footbridge for pedestrian bridges .
[0101]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0102]
Embodiment 1
First, a water gate door body and a water gate door stop according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 7.
[0103]
FIG. 1 is a flowchart showing a method for forming an FRP molded body according to the first embodiment of the present invention. FIG. 2 is a front view showing a door of a floodgate as an FRP product manufactured by assembling the FRP molded body according to the first embodiment of the present invention. FIG. 3 (a) is a skin plate which is a part of a door of a floodgate which is an FRP product according to the first embodiment of the present invention, (b) is a stringer, (c) is a gusset plate covering the stringer, (d) is a perspective view of a short cross beam, and (e) is a perspective view of a long cross beam. FIG. 4A is a front view illustrating a method of assembling a skin plate, which is a part of a door body of a floodgate, which is an FRP product according to the first embodiment of the present invention, to another part, and FIG. 4B is a rear view. FIG. 5A is a view showing a structure for concealing an assembling portion of a skin plate which is a part of a door body of a floodgate which is an FRP product according to the first embodiment of the present invention, and FIG. 5B is a view showing a concealed state. is there. FIG. 6 is a perspective view showing another example of the gusset plate which is a part of the door of the floodgate which is the FRP product according to the first embodiment of the present invention. FIG. 7 is a perspective view showing a door stop of a water gate, which is an FRP product according to the first embodiment of the present invention, together with a door body.
[0104]
First, a method for forming an FRP molded body according to the first embodiment will be described with reference to the flowchart in FIG. First, a mold of an FRP molded body (for example, a skin plate of a door of a water gate) produced in step S1 is assembled. At this time, a heating means (for example, an electric heater) for heating the mold is set below the mold. Next, a release agent is applied to the inner surface of the assembled mold (Step S2), and a gel coat is applied to the inner bottom surface of the mold (Step S3), and heated to approximately 25 to 45 ° C. by an electric heater. The gel coat is cured (Step S4). The gel coat serves to improve the appearance of this surface when the FRP molded body is completed.
[0105]
Next, a step of the hand lay-up method is performed. That is, first, a glass cloth is laid in a mold (step S5), an unsaturated polyester resin as a thermosetting resin and a curing accelerator are poured, and the surface is leveled by an application roll (step S6). A glass mat is laid on the laminate (Step S7), the unsaturated polyester resin and the curing accelerator are poured, and the surface is smoothed by an operator with an application roll (Step S8). Repeat until the height is In addition, both the lamination process of the glass cloth (Steps S5 and S6) and the lamination process of the glass mat (Steps S7 and S8) are performed at a relatively low temperature of approximately 35 to 50 ° C.
[0106]
Then, a press as a pressurizing means provided with an electric heater as a second heating means is placed on the laminate as a compact having a predetermined height, and set under the electric heater and a mold. The laminate as a molded body was heated to about 140 ° C. by a heated electric heater, and about 50 kgf / cm ² (Step S9). As a result, the air inside the laminate is extruded into a dense structure, and the resin is cured in a short time by being heated at a high temperature of about 140 ° C., and the FRP molded body has higher strength. After the heat curing and the pressurization are completed in this way, the FRP molded body is removed from the mold after being cooled (step S10). Since the mold release agent has been applied to the inner surface of the mold in step S2, the FRP molded body comes off smoothly.
[0107]
By combining the FRP molded bodies of various shapes and sizes produced in this way, a wide variety of FRP products can be obtained. As a specific example, the case of the door 1 of the floodgate shown in FIG. 2 will be described. The door 1 has a flat skin plate 2, five vertical beams 3 as reinforcements for reinforcing the skin plate 2, and two types of beam members for connecting and reinforcing the five vertical beams 3. And the gusset plate 3b installed on the stringer 3 to prevent the door body 1 from being twisted or distorted with a large number of stainless steel bolts and nuts. Has been assembled.
[0108]
More detailed shapes of these components will be described with reference to FIG.
[0109]
As shown in FIG. 3A, a skin plate 2 serving as a base of the door body 1 has a simple flat plate shape, and as shown in FIG. 3B, a stringer 3 has two C-shaped channel members. Are bonded back to back to form a member having an H-shaped cross section. As shown in FIG. 3C, the gusset plate 3b has a flat plate shape, is installed on the stringer 3, and is integrally bolted with stainless steel bolts. Then, as shown in FIGS. 3 (d) and 3 (e), two C-shaped channel members are adhered back to back to the horizontal beams 4 and 5 similarly to the vertical beams 3 to form a member having an H-shaped cross section. It is a thing. The beam member is not limited to the member having the H-shaped cross section, and a channel member having a C-shaped cross section (U-shaped) may be used, or a member having a H-shaped cross section and a member having a C-shaped cross section may be mixed and used. I do not care.
[0110]
Next, a method of connecting these girders to the flat skin plate 2 will be described with reference to FIG. Here, the case of connection with the cross beam 14 having a C-shaped cross section is shown.
[0111]
As shown in FIG. 4, the skin plate 2 and the cross beam 14 are joined by hexagon bolts and nuts. A stainless steel hexagon bolt 6 is passed from the skin plate 2 side and tightened by a stainless steel hexagon nut 9. However, since the receiving surface inside the cross beam 14 is tapered, the stainless steel is formed of a reverse tapered stainless steel. The receiving surface is made parallel using a taper washer 7, and tightened with a hex nut 9 via a stainless spring washer 8 to further increase the tightening force.
[0112]
As shown in FIG. 4 (a), the head of the hexagonal bolt 6 can be seen in such a normal mounting method. However, when this is not visually pleasing, as shown in FIG. When the hole 10 is processed, the surface may be hidden by the resin coating 12 after the dish is rubbed and fixed with the stainless steel countersunk bolt 11.
[0113]
As another example of the gusset plate, as shown in FIG. 6, the horizontal and vertical beams 14 and 15 of the C-shaped channel butted at the corners of the skin plate 2 are bolted to the pentagonal gusset plate 16. By performing the connection at all four corners, the door body can be prevented from being twisted or distorted.
[0114]
The door body 1 of the floodgate is completed in this manner, and the method of manufacturing each of the members 2, 3a, 3b, 4a, 5a, 14, 15, and 16 is as described above with reference to the flowchart of FIG. . Therefore, when heated and pressurized at a high temperature, the FRP molded body has a small number of voids therein and has high strength, and can be made thin. Therefore, the door body 1 in which these are assembled also has a lightweight and strong structure.
[0115]
Next, the door stop of the water gate where the door 1 moves up and down will be described with reference to FIG. The door stop 20 of the floodgate is composed of H-shaped members 17 and 18 having grooves into which both side ends of the floodgate door 1 are fitted, and a bottom member 19 to which the lower surface of the door 1 closely adheres. It serves as a guide groove when moving up and down, and when the door 1 comes to the lower end, it is integrated with the door 1 to block the flow of water. Note that rubber is attached to a surface of the door body 1 that contacts the door stop 20 to prevent water leakage. The members 17 and 18 having the H-shaped cross section are formed by attaching the CRP shaped bodies having the cross section C back to back, and the bottom member 19 is formed by mounting the FRP formed body having the cross section C with the protruding portions downward. is there. The door 20 of the floodgate composed of these members 17, 18, 19 is fixed in the waterway with concrete.
[0116]
The method for manufacturing these members 17, 18, and 19 is also as described above with reference to the flowchart of FIG. Therefore, when heated and pressurized at a high temperature, an FRP molded body having few voids therein and high strength is obtained, and the door stop 20 obtained by assembling them becomes a strong structure.
[0117]
The door 1 is moved up and down by rotating an electric motor or a manual handle above a support rod 21 welded to a fixing plate 22 fixed to the upper surface of the door 1 with bolts.
[0118]
Embodiment 2
Next, with reference to FIGS. 1 to 7, a description will be given of a door body, a door stop, and a vertical (open / close) mechanism of the door body of a floodgate according to a second embodiment of the present invention with reference to FIGS. I do. FIG. 8 is a flowchart showing a method for forming a CFRP (carbon fiber reinforced plastic) formed body according to the second embodiment of the present invention. FIG. 9A is a front view showing the entire configuration of a manually opened / closed water gate according to the second embodiment of the present invention, and FIG. 9B is a side view.
[0119]
First, a method for forming a CFRP molded body according to the second embodiment will be described with reference to the flowchart in FIG. Steps S11 to S14 are completely the same as steps S1 to S4 in FIG. Next, a step of the hand lay-up method is performed. That is, first, a carbon fiber cloth is laid in a mold (Step S15), an unsaturated polyester resin as a thermosetting resin and a curing accelerator are poured, and the surface is leveled by an application roll (Step S16). Subsequently, a carbon fiber mat is laid on the laminate (Step S17), the unsaturated polyester resin and the curing accelerator are poured, and the surface is smoothed by an application roll (Step S18). Is repeated until a predetermined height is reached.
[0120]
Here, if the strength of the molded body (for example, the skin plate of the gate of the floodgate) is the same as that of the first embodiment, CFRP is far superior in strength to FRP using only glass fiber. Therefore, the height of the laminated body can be reduced, and the time required for the laminating step is reduced. Note that both the carbon fiber cloth laminating step (steps S15 and S16) and the carbon fiber mat laminating step (steps S17 and S18) are performed at a relatively low temperature of approximately 35 to 50 ° C.
[0121]
Then, a press as a pressurizing means provided with an electric heater as a second heating means is placed on the laminate as a compact having a predetermined height, and set under the electric heater and a mold. The laminate as a molded body was heated to about 140 ° C. by a heated electric heater, and about 50 kgf / cm ² Press (step S19). As a result, the air inside the laminate is extruded to form a dense structure, and when heated at a high temperature of about 140 ° C., the resin is cured in a short time and a CFRP molded body having higher strength is obtained.
[0122]
When the heat curing and the pressurization are completed in this way, the CFRP molded body is removed from the mold after being cooled (step S20). Since the mold release agent has been applied to the inner surface of the mold in step S12, the CFRP molded body comes off smoothly.
[0123]
A wide variety of CFRP products can be obtained by combining CFRP molded bodies of various shapes and sizes produced in this way. As a specific example, the case of the door 1 of the floodgate shown in FIG. 2 will be described. The door 1 has a flat skin plate 2, five vertical beams 3 as reinforcements for reinforcing the skin plate 2, and two types of beam members for connecting and reinforcing the five vertical beams 3. And the gusset plate 3b installed on the stringer 3 to prevent the door 1 from being twisted or distorted is connected with a large number of bolts and nuts and assembled. Have been.
[0124]
As described above, since the strength of the CFRP molded body is higher than that of the FRP molded body using only glass fiber, the parts 2, 3a, 3b, 4a, 5a (see FIG. 3) of the door 1 can be made thin. Furthermore, since the five stringers 3 can be reduced to four, the door of the CFRP molded body formed by assembling these parts is much lighter than the door 1 of the first embodiment.
[0125]
Next, as shown in FIG. 7, the door stop of the sluice where the door body moves up and down is formed by H-section members 17 and 18 having grooves into which both side ends of the sluice door body are fitted, and the lower surface of the door body. The members 17, 18, and 19 are also thinner as a CFRP molded body according to the flow chart of FIG. 8, and the groove width is narrower in accordance with the thickness of the door of the CFRP molded body. The door stop of the sluice, which is made and thus made of the CFRP molded body, is fixed in the water channel with concrete.
[0126]
Here, before reaching the predetermined height in step S18 of the flowchart of FIG. 8 and proceeding to the high-temperature heating / compression step of step S19, the carbon fiber cloth or carbon fiber mat (or carbon fiber yarn / carbon fiber flake) is once again used. By performing the laminating step, the carbon fibers can be projected from the surface of the completed CFRP molded body. Therefore, the carbon fibers also protrude from the surface of the door of the CFRP molded body obtained by assembling these components, and the inventor has found that the carbon fibers grow with algae in water. As a result, algae, aquatic plants, and the like grow on portions of the gate body that are immersed in the water, and become part of natural waterways, rivers, lakes, marshes, and shores, thus providing an environmentally friendly gate gate.
[0127]
It should be noted that the carbon fibers are prevented from protruding from both ends which are fitted in the door stop of the floodgate and the groove of the door body of the floodgate and which move up and down. If a large amount of algae or the like adheres to the door stop of the water gate and both ends of the door body of the water gate, the door body cannot be moved up and down smoothly and the water channel cannot be sealed.
[0128]
Further, the vertical movement of the door body is performed by pulling up the support rod 21 welded to the fixing plate 22 fixed to the upper surface of the door body with bolts by rotating the electric motor or the manual handle upward. Since the door of the floodgate according to the second embodiment is made light, the ability of the opening / closing device (electric motor or manual handle) for the door can be set to a low load. As a result, carbon fiber is more expensive than glass fiber, but since the CFRP molded body can be made thinner, the amount of use can be reduced to about half, the door of the floodgate becomes lighter, and the capacity of the switchgear can be set to a low load. The cost can be reduced.
[0129]
Next, a specific example of the door of the floodgate, the door stop, and the opening / closing device of the door will be described with reference to FIG. As shown in FIG. 9, the lock gate door body 33 and the lock gate stop 34 made of the CFRP molded body manufactured as described above are used for a manually operated opening / closing type slide gate 25.
[0130]
The sliding type water gate 25 has a door stop 34 made of a CFRP molded body whose lower half is fixed in a waterway with concrete, and a door body 33 made of a CFRP molded body that moves up and down by fitting into the groove of the door stop 34. An iron frame 35 horizontally fixed to the upper end of the door stop 34; a fixing plate 30 bolted to the center of the upper end of the door body 33; and a spindle as a support rod connected to the fixing plate 30 with a pin. 29, a gearbox 27 containing a bevel gear meshing with the spindle 29 fixed on the frame 35, a spindle cover 28 for covering the gearbox 27 and the spindle 29 from rainwater, etc. The bevel gear rotates by being directly connected to and rotating the bevel gear, whereby the spindle 29 moves up and down and the door body 33 slides up and down. And a manual handle 26 for Id.
[0131]
Further, as shown in FIG. 9B, an operation console 31 for the operator who turns the manual handle 26 to stand and a pair of steps 32 for ascending from both banks of the water channel to the operation console 31 are reduced to the door stop 34. Installed. When the operator stands at the center of the operation console 31 and holds the handle 26a of the manual handle 26, and turns the manual handle 26 clockwise (clockwise), the bevel gear in the gear box 27 rotates and the spindle 29 rises. Then, the door 33 of the floodgate slides up, and the slide type floodgate 25 is opened. The raised spindle 29 enters the spindle cover 28. When the operator turns the manual handle 26 counterclockwise (counterclockwise), the spindle 29 descends, and the gate 33 of the floodgate slides down, whereby the slide type floodgate 25 is closed.
[0132]
As shown in FIG. 9B, the water flow passing through the door stop 34 from the operation console 31 side is the main water flow, and the reverse water flow flows in the opposite direction. When the water is flowing in the main channel in the direction of the main flow, the door 33 of the floodgate is normally raised and opened, and the water level on the left side of the slide type floodgate 25 increases due to heavy rain and the reverse flow has flowed out. At times, the slide gate 25 is closed by lowering the door 33 of the gate. Here, a watertight rubber 33a is attached to the bottom surface of the door 33 of the floodgate to maintain the hermeticity.
[0133]
Here, as described above, since the door body 33 made of CFRP is very lightweight, the capacity of the manual opening / closing mechanism including the spindle 29, the gear box 27, the manual handle 26, etc. for lifting the door is small, and the price is low. Even the door body 33 made of CFRP using high carbon fiber can be made thin because of its high strength, so that the amount of carbon fiber used can be reduced, and the capability of the manual opening / closing mechanism can be reduced in this way. Therefore, the cost can be reduced as the whole slide type water gate 25.
[0134]
In this way, since the door of the floodgate according to the second embodiment is made of a CFRP molded body, the thickness is reduced by half to 2/3 in order to have the same strength in design as compared with the FRP using glass fiber. By doing so, the weight can be reduced accordingly. In addition, carbon fiber is more expensive than glass fiber, but the amount of water used can be reduced to about half, and the weight of the door of the gate can be reduced, so that the capacity of the opening and closing device of the door can be set to a low load. Can be reduced in cost.
[0135]
Embodiment 3
Next, a door of a floodgate, a door stop, an up-and-down (open / close) mechanism of the door, and a management bridge according to a third embodiment of the present invention will be described with reference to FIGS. 10 and 11. FIG. 10 is a front view showing the entire configuration of an electric opening / closing type water gate using a door body and a door stop made of a CFRP molded body according to Embodiment 3 of the present invention. FIG. 11 is a side view showing the entire configuration of the electric switchgear and the management bridge according to the third embodiment of the present invention.
[0136]
As shown in FIG. 10, the electric opening / closing sluice 41 according to the third embodiment is configured around a concrete gate post 44, and the upper end of the gate post 44 (from the bottom of the door stop 48). The height to the lower end is about 8.75 m. The height of the gate 50 of the sluice gate is also about 1.9 m, the width is about 2.2 m, and it is necessary to receive the water pressure applied to this surface. The girder is stretched and strengthened. However, since the door 50 of the sluice is also made of a CFRP molded body (all of the skin plate, the vertical girder, the horizontal girder, and the gusset plate) according to the flowchart of FIG. Only the FRP molded body manufactured by using only the FRP molded body is excellent in strength, and each part of the door body 50 can be made thinner. Therefore, the weight of the door body 50 can be reduced.
[0137]
The door body 50 has a rack bar 45 fixed to a fixing member 49 bolted to the center of the upper end and extends upward, so that the upper end of the gate post 44 is an operation table 44 a surrounded by a substantially square protective fence 43. , Is fitted to an electric rack type switchgear 42 fixed substantially at the center thereof. The rack bar 45 is made of steel and is made of rust-proof plating. Since the rack bar 45 is long, it penetrates through an intermediate vibration damper 47 attached to a support member 46 fixed to the gate post 44 so as not to bend in the middle. It is supported to be kept. When pulling up the rack bar 45 and the door body 50 attached to the lower end thereof, the electric rack switchgear 42 rotates the pinion gear meshed with the rack bar 45 with an electric motor to raise the pinion gear.
[0138]
The upper and lower rollers 50a are mounted on the left and right sides of the door body 50, respectively, and these rollers 50a form a roller gate that rises and descends while rotating in contact with the surface of the door stop 48.
[0139]
At this time, the door body 50 is made of a CFRP molded body as described above, and since it is light, the pulling ability of the electric rack switchgear 42 can be small, and the cost of the water gate 41 as a whole can be reduced. When the door 50 is lowered, the electric rack-type switchgear 42 is unlocked and lowered by the weight of the door 50 and the rack bar 45, but the brake is applied without falling to the bottom of the door stop 48 at a stretch. The self-weight drop type electric rack switchgear 42 is used.
[0140]
Next, a description will be given of a case where the electric open / close type floodgate 41 is used for embankment of a river, with reference to FIG. The same members as those in FIG. 10 are denoted by the same reference numerals, and description thereof will be omitted.
[0141]
In the water channel where the door body 50 of the electric opening / closing type water gate 41 is opened, a ceiling / floor surface 52 and a culvert 51 whose both sides are covered with concrete are formed. The culvert 51 is connected to the river through the electrically operated sluice gate 41, and is formed under the rectangular surface 53a of the embankment 53. The exit on the opposite side is connected to the waterway, river, lake or marsh outside the embankment 53. I understand. Here, in order to ascend to the operation console 44a of the electric rack switchgear 42, since the embankment 53 has a rectangular surface 53a, it is necessary to provide a management bridge 55 from the top 53b of the embankment 53 to the operation console 44a.
[0142]
The management bridge 55 is composed of a pair of bridge girder connecting short girder 56 (the bridge girder on the opposite side is hidden behind the bridge girder in front and not shown), a tread plate 57 which is passed between the pair of bridge girder and which a person steps on. And it consists of a pair of protective fences 58 respectively attached on a pair of bridge girders. As these members (the girder 56, the step board 57, and the protective fence 58), those manufactured as CFRP molded bodies according to the flowchart of FIG. 8 are used. Further, the step board 57 is about 50 kgf / cm in step S19 of the flowchart of FIG. ² After compressing and bleeding air by applying pressure, gravel is scattered on the surface, and then heated to about 140 ° C. to completely cure. By embedding the gravel in the surface of the step plate 57 made of the CFRP molded body in this way, the surface becomes uneven and hard to slip, and the step plate 57 is less likely to fall even when snow falls or freezes in winter.
[0143]
Assembling of the management bridge 55 is performed by joining the short girders 56 with each other and fixing them with a plurality of bolts and nuts, and when the length becomes a predetermined length, the operation block 44a and the concrete block fixed to the top 53b of the embankment 53 It is fixed to the operation table 44a and the concrete block 55a at predetermined positions with bolts, respectively, while passing between the 55a. In this way, when a pair of bridge girders are installed in parallel at a predetermined interval, the step plate 57 is passed between the pair of bridge girders, and the step plate 57 is fixed to the bridge girder with a plurality of bolts and nuts. In the third embodiment, since the distance between the operation console 44a and the concrete block 55a is about 8 m, and the length of the tread plate 57 is about 2 m, the tread plate 57 made of four CFRP molded bodies is used. Is fixed between a pair of bridge girders.
[0144]
Then, a pair of protective fences 58 manufactured as a CFRP molded body according to the flowchart of FIG. 8 are fixed to a pair of bridge girders, respectively, to complete the management bridge 55 composed entirely of the CFRP molded body. Since the management bridge 55 can make each member much lighter than the conventional steel bridge, the construction is easy, and the management bridge 55 is very excellent in anticorrosion property and does not rust like steel bridges. Therefore, it can be used for a long time.
[0145]
In this way, since the door 50, the door stop 48, and the management bridge 55 of the floodgate according to the third embodiment are made of CFRP molded bodies, they have the same design strength as FRP using glass fiber. For this purpose, the thickness can be reduced to half to ／, and the weight can be reduced accordingly. In addition, carbon fiber is more expensive than glass fiber, but the amount of use can be reduced to about half, and the weight of the door of the water gate is reduced, so that the capacity of the opening and closing device of the door can be set to a low load. Since the construction of the management bridge 55 is also reduced because the weight of the management bridge 55 is reduced, it is possible to reduce the cost as a whole of the electric open / close type water gate 41.
[0146]
Embodiment 4
Next, a door and a door stop of a natural opening / closing type water gate (flap gate) according to a fourth embodiment of the present invention and a method for manufacturing the same will be described with reference to FIGS. FIG. 12 is a flowchart showing a method for forming an HBRP (hybrid reinforced plastic) formed body according to the fourth embodiment of the present invention. FIG. 13 is a schematic vertical sectional view showing the structure of the flap gate according to the fourth embodiment of the present invention. FIG. 14A is a front view showing the entire configuration of the flap gate according to the fourth embodiment of the present invention as viewed from the river side, and FIG. 14B is a longitudinal sectional view.
[0147]
First, a method for forming an HBRP molded body according to the fourth embodiment will be described with reference to the flowchart in FIG. Steps S21 to S24 are completely the same as steps S1 to S4 in FIG. Next, a step of the hand lay-up method is performed.
[0148]
That is, first, a glass fiber cloth is laid in a mold (step S25), an unsaturated polyester resin as a thermosetting resin and a curing accelerator are poured, and a worker smoothes the surface with an application roll (step S26). Subsequently, a carbon fiber cloth is laid on the laminate (Step S27), the unsaturated polyester resin and the curing accelerator are poured, and the surface is leveled by an application roll (Step S28). Is spread on the laminate (step S29), the unsaturated polyester resin and the curing accelerator are poured, and the surface is smoothed by an application roll (step S30). Then, the carbon fiber mat is placed on the laminate. (Step S31), pour the unsaturated polyester resin and the curing accelerator, and smooth the surface with an application roll (Step S32). This procedure laminate repeated until a predetermined height.
[0149]
Here, if the strength of the formed body (for example, the skin plate of the gate of the floodgate) is the same as that of the first embodiment, HBRP is superior in strength to FRP using only glass fiber. In addition, the height of the laminated body can be reduced, and the time required for the laminating step is reduced. In addition, the lamination process of the glass fiber cloth (steps S25 and S26), the lamination process of the carbon fiber cloth (steps S27 and S28), the lamination process of the glass fiber mat (steps S29 and S30), and the lamination process of the carbon fiber mat (Steps S31 and S32) are also performed at a relatively low temperature of approximately 35 to 50 ° C.
[0150]
Then, a press as a pressurizing means provided with an electric heater as a second heating means is placed on the laminate as a compact having a predetermined height, and set under the electric heater and a mold. The laminate as a molded body was heated to about 140 ° C. by a heated electric heater, and about 50 kgf / cm ² (Step S33). As a result, the air inside the laminate is extruded to form a dense structure, and the resin is cured in a short time by being heated at a high temperature of about 140 ° C., and the HBRP molded body has higher strength.
[0151]
After the heat curing and pressurization are completed, the HBRP molded body is removed from the mold after the HBRP molded body has cooled (step S34). Since the mold release agent has been applied to the inner surface of the mold in step S22, the HBRP molded body comes off smoothly. As another method of manufacturing the HBRP molded body, there is a method of laminating a hybrid cloth made of carbon fiber and glass fiber instead of the carbon fiber cloth and carbon fiber mat in steps S15 and S17 of the flowchart of FIG. .
[0152]
In the method of manufacturing an HBRP molded article according to the flowchart of FIG. 12, the strength and price of the molded article can be controlled by changing the amount of lamination between the carbon fiber cloth mat and the glass fiber cloth mat. In another method of laminating the hybrid cloth, the strength and cost of the molded article can be controlled by changing the ratio of the carbon fiber and the glass fiber of the hybrid cloth in advance.
[0153]
A wide variety of HBRP products can be obtained by combining the HBRP molded bodies of various shapes and sizes produced in this way. As a specific example, a case of the door body 61 of the flap gate 60 shown in FIGS. 13 and 14 will be described.
[0154]
As shown in FIG. 13, the flap gate 60 is a kind of a natural opening / closing type floodgate. Normally, water flows from the culvert whose ceiling, floor and both sides are covered with concrete C1 toward the river. The door 61 is made lightly and is suspended by a hinge 62. The door 61 is naturally opened by the pressure of water flowing in the culvert as shown by a solid line, and drains the water in the culvert to a river. On the other hand, when the water in the river increases due to heavy rain or the like, and water tries to enter in the reverse direction from the river, the door body 61 closes to a door stop (not shown) as indicated by an imaginary line due to the water pressure, and the door is closed. The sealing rubber 63 provided around the back side of the body 61 prevents water from flowing into the culvert.
[0155]
As described above, the flap gate 60 can be moved at a small water level because the door body (gate body) 61 is made of an HBRP molded body and is lightweight, and is normally under drainage conditions as indicated by a solid line. It is excellent, and is excellent in preventing backwater as shown by the imaginary line in an emergency. Similarly, the gates for natural drainage and natural water stoppage of natural gates such as swing gates (horizontal opening) and miter gates (gate opening) which are natural opening / closing type gates can be manufactured by manufacturing the door body (gate body) with HBRP or CFRP. It becomes a lightweight, natural opening and closing type floodgate with excellent drainage conditions and backwater prevention.
[0156]
Next, the detailed structures of the flap gate 60 and the door body (gate body) 61 will be described with reference to FIG. As shown in FIG. 14A, the door body 61 of the flap gate 60 is suspended by a pair of hinges 62 attached to the concrete portion C1 at the exit of the culvert. As shown in FIG. 14 (b), the hinge 62 has a pair of support channels 62a fixed to the concrete C1 side, respectively, and a suspension suspended between the support channels 62a and rotatably stopped by pins 62b. The lowering plate 62c is constituted by a fixing jig 62e which is rotatably stopped by pins 62d across the lower end of the hanging plate 62c and is fixed to the upper end of the door body 61.
[0157]
The door body 61 is entirely formed of an HBRP molded body manufactured according to the flowchart of FIG. 12, and one skin plate 65 is provided with three C-shaped cross beams 66 and three C-channel shaped cross beams 66. A stringer 67, three flat gusset plates 68 attached to cover the stringers 67, and a pair of skin plate reinforcing jigs 69 are assembled by a plurality of bolts and nuts. Further, as shown in FIG. 14 (b), along the outer edge of the skin plate 65, a sealing P-shaped rubber 63 is stuck to the upper edge, lower edge and both side edges of the skin plate 65 without gaps. .
[0158]
On the other hand, on the concrete part C1 side of the outlet of the culvert, four L-channel-shaped door stops 64 also formed of HBRP molded bodies are formed in a square that is slightly larger than the door body 61 and embedded in the concrete part C1. . As described above, when the water level of the river rises due to heavy rain and the water of the river is likely to flow back into the culvert, the door 61 which is light and has excellent movable performance is hit by the subtle change in the water pressure of the river. 64, a sealed state is formed by the P-type rubber 63 to prevent backflow. Here, in order to support the door stop 64 when the water level of the river further rises and the water pressure applied to the door body 61 and the door stop 64 increases, the supporting iron plate T1 abuts on the corner of the door stop 64 and concrete. It is embedded in the part C1.
[0159]
As described above, the flap gate 60 according to the fourth embodiment uses the door body 61 and the door stop 64 made of an HBRP (hybrid reinforced plastic) molded body. And a natural open / closed floodgate with excellent drainage conditions and backwater prevention. Further, the strength of the HBRP molded body can be finely adjusted, and the flap gate 60 having an appropriate product price can be obtained.
[0160]
If the flap gate 60 is made up of a door 61 and a door stop 64 made of a CFRP (carbon fiber reinforced plastic) molded body, the strength is further increased and the weight can be further reduced. Improved but at higher cost. Therefore, it is necessary to determine the material of the door 61 and the door stop 64 in consideration of necessary strength, movable performance and product price. The same applies to the swing gate and the miter gate, and also to the slide gate of the second embodiment and the roller gate of the third embodiment.
[0161]
Embodiment 5
Next, a screen according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 15 is a front view showing the configuration of the screen according to the fifth embodiment of the present invention.
[0162]
The screen 71 shown in FIG. 15 is installed in intakes such as rivers, lakes and marshes, dams, and various waterways such as irrigation canals and drainage canals to block flowing dust and flow into the intakes and irrigation canals. This is to prevent it. The screen 71 has seventeen vertical columns 72 fixed to three horizontal columns 73 with stainless steel bolts and nuts. Both the vertical columns 72 and the horizontal columns 73 are manufactured according to the flowchart of FIG. It is a CFRP (carbon fiber reinforced plastic) molded product. For this reason, because of its excellent strength, even large dust such as driftwood can be blocked with sufficient margin, and because of its light weight, a low-capacity switchgear can be used even if it is an openable screen. Can be opened and closed. Furthermore, since it is excellent in anticorrosion properties and does not rust even when installed in water, it can be used for a long time.
[0163]
Here, if the screen 71 is installed in a water intake or a water channel for a long time, the blocked dust collects between the vertical columns 72, and the flow of the water becomes poor. Therefore, it is necessary to periodically remove the dust accumulated on the screen 71. Even in this case, since the screen 71 is lightweight, the screen 71 can be easily pulled out of the water, and has a feature that maintenance is easy.
[0164]
As described above, since the screen 71 according to the fifth embodiment is made of a CFRP molded body, it can be opened and closed by a durable, light, and low-capacity switchgear, so that the overall cost can be reduced. .
[0165]
The screen 71 of the fifth embodiment is used for a relatively small water channel. When used in large waterways, water intakes, rivers, etc., it is difficult to remove the litter collected from the water one by one, and it is necessary to remove the litter collected as it is installed. Next, such a large screen (dust remover) will be described.
[0166]
Embodiment 6
Next, a dust remover according to a sixth embodiment of the present invention and its peripheral equipment will be described with reference to FIGS. FIG. 16 is a longitudinal sectional view showing the entire configuration of the dust remover according to the sixth embodiment of the present invention and the peripheral equipment. FIG. 17 is a plan view showing an overall configuration of a dust remover according to Embodiment 6 of the present invention. FIG. 18 is a front view showing the entire configuration of the dust remover according to the sixth embodiment of the present invention. FIG. 19 is a cross-sectional view showing part of the details of the dust remover according to the sixth embodiment of the present invention. FIG. 20 is a longitudinal sectional view showing the entire configuration of the dust remover according to the sixth embodiment of the present invention.
[0167]
The dust remover 75 shown in FIG. 16 is installed in various water channels such as water intakes such as rivers, lakes and marshes and dams, and irrigation canals and drainage channels. This is a device for preventing the water from flowing into the irrigation channel. In addition, in order to prevent the blocked dust from collecting and obstructing the water flow, the blocked dust is lifted by the rake 77, transported by the horizontal belt conveyor 80, and accumulated at a predetermined dust accumulation place. Therefore, the refuse blocked in the state installed in the waterway can be removed, so that a large-sized device suitable for a wide waterway can be obtained.
[0168]
The dust remover 75 includes a pair of plate-shaped frames 83 installed at both ends of the water channel, a plurality of girders 84 connecting and reinforcing the pair of frames 83, and a water channel upstream of the frame 83. And an auxiliary screen 78 rotatably mounted around a rotary shaft 78a in the vicinity of the water channel bottom C2, and a stainless steel two-stage sprocket mounted on the upper end of the frame 83. The conveyor chain 79 made of stainless steel, which moves along the frame 83 by the rotation of the larger sprocket 89, and four rakes 77 (FIG. 16) which are attached to the conveyor chain 79 at equal intervals and move together. Only one is shown), and is bent along the frame 83 in close contact with the upper end of the fixed screen 76. And a dust plate 82 to reach.
[0169]
The auxiliary screen 78 is pushed by the rake 77 each time the rake 77 rotates, and rotates leftward (counterclockwise) in the figure around the rotation shaft 78a to pass the rake 77 and to the auxiliary screen 78. The accumulated dust is scooped up, and after passing through the rake 77, the dust is returned to the original position by the repulsive force of the spring housed in the rotating shaft 78a.
[0170]
Among these members, a pair of frames 83, a plurality of girders 84, a fixed screen 76 and an auxiliary screen 78, four rakes 77, and a dust plate 82 were manufactured according to the flowchart of FIG. It is made of CFRP (carbon fiber reinforced plastic) molded product.
[0171]
The conveyor chain 79 and the rake 77 move clockwise (clockwise) in FIG. That is, it rises along the fixed screen 76 and the dust plate 82, and falls on the downstream side (back side). Below the point where the rake 77 goes up along the dust plate 82 and drops the lifted dust, a horizontal belt conveyor 80 is provided extending in a direction perpendicular to the paper surface, and has fallen from the dust remover 75. The garbage G1 is received and transported in the direction shown in the figure.
[0172]
An inspection gantry 90 is provided in the vicinity of the horizontal belt conveyor 80 along the longitudinal direction of the horizontal belt conveyor 80, and the step 90a is combined with the girder 90a to a position one step higher than the transport surface 80b of the horizontal belt conveyor 80. (Stepping plate) 93 is supported horizontally. Both ends of the step 93 and the opposite side of the horizontal belt conveyor 80 are surrounded by protective fences 91, and the side of the horizontal belt conveyor 80 is open. Further, a protective fence 91 is cut and a ladder 92 is attached at an intermediate position in the longitudinal direction of the inspection gantry 90. An operator climbs on the step 93 with the ladder 92, and checks the state of the horizontal belt conveyor 80 from above. Can be checked.
[0173]
When the smooth operation of the horizontal belt conveyor 80 is hindered by, for example, a large driftwood or the like, the operation panel (not shown) provided at the step 93 of the inspection gantry 90 is operated to operate the horizontal belt conveyor 80. The deceleration motor (not shown) for moving the transport surface 80b and the cyclo reduction device 87 for moving the conveyor chain 79 of the dust remover 75 are temporarily stopped, and large catching driftwood and the like are removed, and then the operation is restarted on the operation panel.
[0174]
The cyclo reducer 87 is mounted on a support check table 85 fixed to one end of a support frame (not shown) which is passed between two support columns 85a fixed to the frames 83 at both ends. A protective fence 85b and a long ladder 86 are attached to the support check table 85, and an operator can climb the long ladder 86 to the support check table 85, and the cyclo reduction gear 87, the conveyor chain 79, etc. Maintenance can be performed. A drive belt 88 is hung on a pulley 87a attached to the drive shaft of the cyclo reduction gear 87. The drive belt 88 is also hung on the smaller pulley of the two-stage sprocket 89. Thus, when the cyclo reducer 87 is operated, its driving force is transmitted as a rotational force to the two-stage sprocket 89, and the conveyor chain 79 and the four rakes 77 attached thereto start moving at a predetermined speed. .
[0175]
A dust chute 95 is also provided between the dust remover 75 and the horizontal belt conveyor 80 so as to extend in the longitudinal direction also perpendicular to the paper surface. This is to prevent dust from dropping into the waterway from between the concrete ceiling C2 that makes the installed waterway a culvert and the dust remover 75. Further, a corner drop 81 is fitted into a groove C3 provided facing each other in a concrete portion C2 forming a water channel. The corner drop 81 performs maintenance and inspection of the underwater portion of the dust remover 75. At this time, the water flow is blocked so that the channel bottom C2 appears.
[0176]
Further, the tension adjuster 94 in which the two-stage sprocket 89 at the upper end of the dust remover 75 is axially fixed moves the two-stage sprocket 89 back and forth by tightening or loosening the outer tension adjustment nut 94a, and the tension of the conveyor chain 79 is adjusted. Is to adjust.
[0177]
Of these members, except for the member of the dust remover 75 described above, the girder 80a of the horizontal belt conveyor 80, the girder 90a of the inspection gantry 90, the protective fence 91, the step 93, the support and inspection table 85 and the support pillar 85a, the protective fence 85b, the dust chute 95, and the corner drop 81 are made of a CFRP (carbon fiber reinforced plastic) molded body manufactured according to the flowchart of FIG.
[0178]
Next, a dust remover 75 according to the sixth embodiment and peripheral equipment will be further described with reference to a plan view of FIG. 17 and a front view of FIG. Note that the same members as those in FIG. 16 are denoted by the same reference numerals, and a description thereof is partially omitted.
[0179]
As shown in FIGS. 17 and 18, one dust remover 75 according to the sixth embodiment is installed in each of two waterways divided by a concrete wall C2. Of these, in the right water channel, a corner drop 81 is fitted in a groove C3 provided opposite to the concrete wall C2, and as described above, this corner drop 81 is used for maintenance and inspection of the underwater portion of the dust remover 75. This is for blocking the water flow when performing this operation, and is not normally used.
[0180]
In the plan view of FIG. 17, the support frame 85b that is passed between the frames 83 not shown in FIG. 16 is clearly shown. The support frame 85b is horizontally fixed between two support columns 85a erected on each of the pair of frames 83, and the cyclo reduction gear is mounted on a support check table 85 fixed on the support frame 85b. 87 are placed. When the cyclo reducer 87 is driven, four rakes (not shown) successively scoop up dust on the auxiliary screen 78 and the fixed screen 76, pass over the dust plate 82, and move on the transport surface of the horizontal belt conveyor 80. Drop garbage on 80b. The horizontal belt conveyor 80 normally operates in conjunction with the cyclo reducer 87, and its transport surface 80b moves to the left to remove the dust G1 picked up by the two dust removers 75 into a predetermined dust. It is transported to the collection location 100.
[0181]
In the plan view of FIG. 18, the center of the fixed screen 76 and the auxiliary screen 78 is broken, and three columns 84 of the dust remover are shown. The beams 84 of the dust removers not only increase the strength of the dust remover 75 by connecting the pair of frames 83 but also support the fixed screen 76. Details will be described with reference to FIG. In addition, a deceleration motor 96 that moves the belt (transport surface) 80b of the horizontal belt conveyor 80 is also shown to be installed on the garbage collection location 100 side. The belt drum 97 installed at the opposite end of the horizontal belt conveyor 80 can be moved back and forth with respect to the speed reduction motor 96 as shown in the drawing, whereby the tension of the belt 80b of the horizontal belt conveyor 80 can be adjusted. Can be adjusted.
[0182]
Next, the detailed structures of the fixed screen 76 and the rake 77 will be described with reference to FIG. FIG. 19 is divided into three parts even though it is a transverse sectional view. The left side is a transverse sectional view of one of the frame 83, the spar 84, the fixed screen 76 and the rake 77, and the center is the spar 84, the fixed screen 76 and The rake 77 is a longitudinal sectional view, and the right side is a transverse sectional view of the girder 84, the dust plate 82 and the rake 77.
[0183]
As shown in the figure on the left side, guide rails 83a around which a stainless steel conveyor chain 79 for rotating the rake 77 along the outer edge of the frame 83 are provided above and below the frame 83. A girder 84 having an H-shaped cross section is fixed to a central portion inside the frame 83 with bolts and nuts made of stainless steel. On the other hand, the fixed screen 76 includes a vertical girder 76a that reaches the upper end of an auxiliary screen (not shown), a stainless steel horizontal shaft 76b that penetrates about 14 sheets in a horizontal direction and stops both ends with nuts, and a vertical girder. In order to keep a constant interval between the 76a, a distance rod 76c inserted for each vertical girder 76a and penetrated by a horizontal shaft 76b is combined.
[0184]
A plurality of stainless steel male screws 76d are welded to a set of fixed screens 76 on some of the distance rods 76c, and are tightened with stainless steel nuts 76e through through holes provided in the H-shaped spar 84. And fixed to the digit 84. In this way, the fixed screens 76 are successively arranged (four in the sixth embodiment) and fixed, and the fixed screen 76 of the dustproof device 75 is assembled.
[0185]
Next, the rake 77 is screwed onto a stainless steel conveyor chain 79 with a C-shaped channel support plate 77b as shown in the center diagram, and the support plate 77b is connected to a vertical beam as shown in the left diagram. Rake plates 77a are fixed at the same intervals as 76a and alternately. As described above, the rake 77 is merely for raising the front surface of the fixed screen 76 and scooping up the dust collected in front of the fixed screen 76. In the sixth embodiment, the vertical girder of the fixed screen 76 is used. The dust at the rear end of the rake plate 77a between the vertical girders 76a is also scraped out.
[0186]
However, in this case, if a hard object such as a stone is tightly sandwiched between the vertical beams 76a, there is a possibility that the entire rake 77 cannot be lifted because it cannot be scraped off at the rear end of the rake plate 77a. is there. Therefore, it is more preferable that the rear end of the rake plate 77a be made of rubber so that if there is tightly trapped dust, the rake plate 77a can be deformed to get over the rake plate 77, so that the rake 77 as a whole does not move. Also, when the rake 77 passes over the dust plate 82 as shown in the diagram on the right, the rear end of the rake plate 77a comes very close to the dust plate 82. The surface of the rake plate may be shaved, but this risk is eliminated if the rear end of the rake plate 77a is made of rubber.
[0187]
Next, the overall arrangement of the guide rails 83a of the conveyor chain 79 and the more detailed structure of the auxiliary screen 78 will be described with reference to FIG.
[0188]
As shown in FIG. 20, the guide rail 83a starts from below the sprocket 89 (rotates clockwise in the figure) for moving the conveyor chain 79, curves substantially parallel to the dust plate 82, and then moves relative to the horizontal plane. It extends downward at an angle of about 75 degrees, turns in a U-shape, passes under the lower end of the fixed screen 76, and extends upward again at an angle of about 75 degrees with respect to the horizontal plane. Then, it is bent substantially parallel to the dust plate 82 and is interrupted before the sprocket 89.
[0189]
The above guide rail 83a is fixed to the frame 83 on the side of the cyclo reducer (not shown), but the guide rail 83a is also fixed symmetrically to the frame 83 on the opposite side. And a sprocket 89 for moving the conveyor chain 79 are provided. As shown in FIG. 19, C-shaped channel support plates 77b are bridged and fixed at four places between the pair of right and left conveyor chains 79, and only two are shown in FIG. Each rake 77 is formed.
[0190]
These rakes 77 move integrally with the conveyor chain 79, but the rotation shaft 98 of the sprocket 89 is passed between the pair of frames 83 so as to be rotatable so that the moving speed of the pair of right and left conveyor chains 79 does not shift. And a pair of left and right sprockets 89 is fixed to the rotating shaft 98. Accordingly, the position of the left and right conveyor chains 79 to which the support plate 77b of the rake 77 is fixed is not shifted, and the synchronized state is maintained.
[0191]
When the rake 77 passes below the fixed screen 76, as described above, the auxiliary screen 78 rotates counterclockwise in the figure around the rotation shaft 78a to pass the rake 77. As shown, the auxiliary screen plates 78b, each of which is close to each other, have a special shape in which the tip is elongated and curved. As a result, the rake 77 pushes and rotates the auxiliary screen 78, scoops up the dust accumulated on the auxiliary screen 78, and returns to the original position by the spring in the rotation shaft 78a after passing. Most of the other auxiliary screen plates 78c apart from the left and right frames 83 have the same shape as that shown in FIG.
[0192]
As described above, in the dust remover 75 of the sixth embodiment, all the members including the cyclo reducer 87, the check table 85 thereof, and the long ladder 86 are connected to the left and right frames 83 to reinforce them. It is attached to the column 84. Therefore, it is only necessary to complete the assembly of the dust remover 75 at the factory, transport it by a trailer or the like, and install it at the installation place, and the work on site is extremely reduced. Here, the dust remover 75 according to the sixth embodiment includes a pair of frames 83, a plurality of girders 84, a fixed screen 76 and an auxiliary screen 78, four rakes 77, a dust plate 82, and a support inspection. The base 85, the support columns 85a, and the support frames 85b are made of CFRP (carbon fiber reinforced plastic) molded bodies manufactured according to the flowchart of FIG.
[0193]
As a result, the total weight is reduced to about half of that of the conventional dust remover which is mostly made of steel, and the transportation and installation work is greatly facilitated. At the time of installation, the lifting member of the crane is engaged with the through-holes of the lifting support portion 99 projecting from the frame 83 in FIG. 20 at three places, lifted from a loading platform such as a trailer, and lifted to the installation location. You can take it down. In addition, since the dust remover 75 uses stainless steel members, including bolts and nuts, as members of the water-wetted portion other than the CFRP molded body, most of the conventional dust removers made of steel are used. It can be used semi-permanently without the paint or plating peeling off and rusting.
[0194]
In the horizontal belt conveyor 80, the girder 80a is made of a CFRP molded body, and the inspection stand 90 is also made of a CFRP molded body for the girder 90a, the protective fence 91, and the step 93, and the dust chute 95 is entirely made of a CFRP molded body. It is extremely light in weight as compared to iron products, making transportation and installation easier.
[0195]
The dust eliminator 75 of the sixth embodiment is operated by an operator operating an operation panel (not shown) provided on the inspection gantry 90 at an appropriate time after observing the degree of dust accumulation on the fixed screen 76. The trash 77 is moved to scoop up the dust, and at the same time, the horizontal belt conveyor 80 is also moved. When the trash scooped by the rake 77 falls and is conveyed to the dust accumulation location 100, the dust on the fixed screen 76 is removed. When substantially removed, the rake 77 and the horizontal belt conveyor 80 may be manually operated such as stopping.
[0196]
Further, for automatic operation, a dust detection sensor such as an optical sensor may be attached to the fixed screen 76, and a switch for automatically moving the rake 77 when a certain amount of dust has accumulated may be turned on. It is also possible to keep statistics on how many times a day and how many minutes to drive the car the best, and use a timer to automatically drive the car based on the results.
[0197]
Embodiment 7
Next, a footbridge and components thereof according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 21A is a front view showing the entire configuration of the pedestrian bridge according to the seventh embodiment of the present invention, FIG. 21B is a plan view, and FIG. 21C is an AA top cross-sectional view of FIG.
[0198]
As shown in FIG. 21A, a pedestrian bridge 101 according to the seventh embodiment is a pedestrian bridge for crossing a road 102b from a sidewalk 102a to a sidewalk 102a on the opposite side. It is configured with a total of five columns 103 supported. At the highest part on the roadway 102b, two types of bridge girders 106 and 107 are supported by one thick strut 103 on the left side and one concrete base 104 as shown in FIG. 21 (b). It is horizontally supported by two thin columns 103.
[0199]
These two types of bridge girders 106 and 107 are provided with a pair of protective fences 108 along the longitudinal direction. On the left side, there is a linear landing stair 105 for ascending and descending from the sidewalk 102a. Is supported by a short support pillar 103 for supporting the floor and a concrete base 104 at the left end which constitutes a stairway exit. A pair of protective fences 108 are also attached to the linear landing stairs 105 along the longitudinal direction. Also, on the right side of the two types of bridge girders 106 and 107, a folded staircase 105 with a landing for going up and down from the sidewalk 102a is provided with a short pillar 103 for supporting the landing and a concrete at the right end which forms the exit of the stairs. It is supported by the base 104. A pair of protective fences 108 is also attached to the folded landing stairs 105.
[0200]
Then, as shown in FIG. 21C, a bottom plate 109 is assembled on the bridge girder 106 over the entire length of the bridge girder 106, and a step plate 110 is also provided on the bottom girder 106 over the entire length of the bridge girder 106. It is paved. Of the above members of the pedestrian bridge 101, five pillars 103, a bridge girder 106, a bridge girder 107, two types of stairs 105 with a landing, a protective fence 108, a bottom plate 109 provided over the whole of the pedestrian bridge 101, and The step board 110 is manufactured as a CFRP molded body according to the flowchart of FIG.
[0201]
Further, the step board 110 is about 50 kgf / cm in step S19 of the flowchart of FIG. ² After applying pressure and bleeding air, gravel 111 is scattered on the surface and heated to about 140 ° C. to completely cure. In this way, as shown in FIG. 21 (c), by embedding the gravel 111 in the surface of the tread plate 110 made of the CFRP molded body, the surface is made uneven so that it is hard to slip, and when winter snow falls or freezes Thus, the tread 110 is less likely to overturn.
[0202]
That is, the pedestrian bridge 101 according to the seventh embodiment is made of a CFRP molded body except for the six concrete bases 104 embedded in the road surface 102, and the weight of the parts excluding the concrete base 104 is the same as that of the conventional steel base. It is about 1/4 to 1/5 the weight of a pedestrian pedestrian bridge, making it extremely easy to assemble members at the factory, transport them in several parts, and assemble them on site. Not only that, the conventional steel pedestrian bridge often peeled off after several years and rusted from it, but the pedestrian bridge 101 according to the seventh embodiment, which is mostly made of CFRP molded product, It has excellent corrosion resistance, does not rust, can be used for a long period of time, and has almost no change in appearance.
[0203]
The bridge girder 106 and the bridge girder 107 may be integrally formed, or may be divided into several parts and connected by bolts and nuts using a gusset plate. Similarly, the bottom plate 109 and the tread plate 110 may be formed as a single plate, or a plurality of short plates having a length of 2 to 3 m may be formed and spread while being fixed with bolts and nuts. Gravel may be embedded in the landings of the two types of landing stairs 105, and in some cases, the entire stairs to prevent slippage.
[0204]
In this way, the pedestrian bridge 101 according to the seventh embodiment is mostly composed of a CFRP molded body in which the molding pressure and the molding temperature are increased by the hand lay-up method to improve the molded body strength and shorten the molding time, Combined with the advantages of the CFRP molded body, the strength is further improved, and each component can be made thinner, so that the weight can be further reduced, and thus the construction can be more easily performed. Can be.
[0205]
The pedestrian bridge according to the present invention is not limited to a pedestrian overpass with stairs that crosses a road, such as the pedestrian bridge 101 of the seventh embodiment. For example, a flat pedestrian bridge that crosses a river or the like in parallel with the road may be used. Is also included.
[0206]
In the first embodiment, the door 1 of the floodgate is described as an example of the FRP product manufactured by processing the FRP molded body, but various other FRP products can be manufactured.
[0207]
In each of the above embodiments, the high-temperature heating temperature is about 140 ° C., and the pressure is about 50 kgf / cm. ² Approximately 50 ° C. to 140 ° C. and approximately 10 to 50 kgf / cm ² Any value within the range is acceptable.
[0208]
Further, in each of the above embodiments except for the first and fourth embodiments, an example of a product using a CFRP (carbon fiber reinforced plastic) molded body as the FRP molded body has been described. If there is no (the thickness may be increased to increase the strength), an HBRP (hybrid reinforced plastic) molded product may be used for part or all of the product instead of the CFRP molded product. Thereby, the cost can be further reduced.
[0209]
Furthermore, in each of the above embodiments, the case where the hand lay-up method is used as the method of molding the FRP molded body is described. However, the CFRP molded body or the HBRP molded body is not limited to the hand lay-up method, Any molding method may be used, including a continuous molding method and a heat and pressure molding method.
[0210]
Further, in each of the above-described embodiments, an example in which an unsaturated polyester resin is used as a thermosetting resin is described. However, in addition to the above, various thermosetting resins including an epoxy resin and a polyvinyl ester resin are used. be able to.
[0211]
Other steps of the method of forming the FRP molded body, FRP product and skin plate of the door of the floodgate, girder material of the door of the floodgate, gusset plate of the floodgate door, door of the floodgate, door stop of the floodgate, and Products, parts and their parts for waterways, rivers, lakes, and shores, as well as the configuration, shape, quantity, material, size, connection, etc. It is not limited to the form.
[0212]
【The invention's effect】
As described above, the method of molding an FRP molded article according to the invention of claim 1 is a method of molding an FRP molded article by a hand lay-up method, wherein a step of assembling a mold and a release agent are provided on an inner surface of the mold. Applying a gel coat over the release agent on the inner surface of the mold, heating the gel coat by heating means provided below the mold, and curing the gel coat; Or a step of laminating a fiber mat on the gel coat, a step of applying a thermosetting resin from above the fiber cloth and / or the fiber mat by an application roll, and a step of heating the thermosetting resin at substantially normal temperature by the heating means. A step of repeating a procedure of curing at a low temperature in the range of ~ 50 ° C until the molded body reaches a predetermined height, and installing a pressurizing means having a second heating means on the upper surface of the molded body. Heating the compact at a high temperature in the range of approximately 50 ° C. to 140 ° C. by the heating means and the second heating means while applying pressure to a predetermined thickness and bleeding air from the compact; And releasing the mold from the mold after the molded body has cooled.
[0213]
Here, the “fiber” includes glass fiber, carbon fiber, and the like.
[0214]
According to such a molding method, since the laminated compacts are compressed by the pressurizing means, the internal air is released, and the compact having few voids is obtained. At the same time, since the molded body is heated at a high temperature in the range of approximately 50 ° C. to 140 ° C. by the heating means and the second heating means, the curing speed is accelerated, the strength of the molded body is further increased, and the molding cycle is shortened. Thus, the number of moldings per hour can be increased, leading to cost reduction.
[0215]
As described above, in the hand lay-up method, by increasing the molding pressure and molding temperature, an FRP molded body molding method capable of improving the molded body strength and shortening the molding time can be achieved.
[0216]
According to a second aspect of the present invention, in the method of the first aspect, the pressure applied by the pressing means is approximately 10 to 50 kgf / cm. ² Is in the range of
[0219]
If the pressing force applied simultaneously with the heating by the pressurizing means is too small, it has no effect, and if it is too large, the structure of the molded body which has been hardened to some extent will be destroyed. As a result of experiments conducted by the inventor, the pressure was set to 10 to 50 kgf / cm during heating at a high temperature of 50 to 140 ° C. ² It has been found that the most effective method is to bleed air from the inside of the molded article, reduce the voids, and improve the strength of the molded article.
[0218]
Thus, in the hand lay-up method, the molding pressure is set to 10 to 50 kgf / cm. ² Within this range, a method for molding an FRP molded article can be achieved in which the density of the molded article can be increased and the strength of the molded article can be improved.
[0219]
An FRP product according to a third aspect of the present invention is obtained by processing an FRP molded product molded by the FRP molded product molding method according to the first or second aspect.
[0220]
The FRP molded article molded by the method for molding an FRP molded article according to claim 1 or 2 has a small number of voids, has high strength, and can be manufactured at low cost. Therefore, by processing one or more FRP molded bodies by cutting, cutting, bonding, assembling, bolting, etc., a high-strength, low-cost FRP product can be obtained. Furthermore, the cost is lower because the mold is inexpensive due to the nature of the hand lay-up method.
[0221]
The skin plate of the door body of the sluice gate according to the invention of claim 4, wherein the mold of the skin plate is assembled, a release material is applied, and a gel coat is applied and heated and cured to form a fiber cloth and / or a fiber mat. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² Is formed by applying a pressure in the range described above to a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0222]
As a result, the laminated compact is compressed with an appropriate pressing force, so that the inside air escapes to form a skin plate with few voids, and at the same time, the compact is heated at a high temperature in the range of approximately 50 ° C to 140 ° C. In addition, the curing speed is promoted, the strength of the molded body is further increased, and the molding cycle is shortened, so that the number of moldings per hour can be increased, leading to a reduction in the cost of the skin plate. In addition, by improving the strength of the skin plate, the thickness can be reduced, and the number of girders for reinforcement can be reduced. This reduces the weight and cost of the entire door body and simplifies the manufacturing process. Will be possible.
[0223]
The girder material of the door body of the floodgate according to the invention of claim 5 is a method of assembling a girder material, applying a release material, further applying a gel coat, curing by heating, and forming a fiber cloth and / or a fiber mat. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape, and evacuating air in the molded body and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0224]
Accordingly, the girder material is compressed with an appropriate pressing force and has a small number of voids and high strength and can be reduced in cost, so that the number of girder materials for reinforcing the skin plate can be reduced.
[0225]
The gusset plate of the sluice door according to the invention of claim 6, wherein the mold of the gusset plate is assembled, a release material is applied, a gel coat is applied, and the gel is heated and cured, and the fiber cloth and / or fiber mat is formed. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² The molded body is formed by applying a pressure in the range described above to obtain a predetermined thickness, removing air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C.
[0226]
The gusset plate is a member that is further reinforced from above to prevent the skin plate reinforced with the girder material from being twisted or distorted, pasted on the girder material, and penetrated to the skin plate with bolts and tightened Also, there is a method of preventing distortion by bolting from above the beam at the four corners of the skin plate.
[0227]
This gusset plate also compresses the laminated compact with an appropriate pressing force, so that the air inside escapes to form a gusset plate with few voids, and at the same time, the compact is heated at a high temperature in the range of approximately 50 ° C to 140 ° C. Therefore, the curing speed is accelerated, the strength of the molded body is further increased, and the molding cycle is shortened, and the number of moldings per hour can be increased, which leads to the cost reduction of the gusset plate. In addition, by improving the strength of the gusset plate, the thickness can be reduced and the number of girders for reinforcement can be reduced, so that the weight and cost of the entire door body and the manufacturing process can be simplified. Will be possible.
[0228]
According to a seventh aspect of the present invention, there is provided a door body of a floodgate, wherein a plurality of girder members of the door body of the floodgate and a plurality of gusset plates of the door body of the sixth aspect are provided, and a skin of the floodgate door body of the fourth aspect. It was made by assembling it on a plate.
[0229]
Thus, since each member has high strength, thinness, and low cost, the entirety of the door of the floodgate manufactured by combining these members can also be made high in strength, light in weight, and low in cost.
[0230]
The door stop of the sluice gate according to the invention of claim 8, assembling a mold of a component of the door stop, applying a release material, further applying a gel coat, heating and curing the fiber cloth and / or the fiber mat. By laminating on a gel coat and applying a thermosetting resin from above the fiber cloth and / or fiber mat, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C. The fiber cloth and / or fiber mat and the thermosetting resin are laminated to a predetermined height to form a molded body, and the molded body is formed on the molded body by approximately 10 to 50 kgf / cm. ² Formed by applying pressure in the range described above to obtain a predetermined thickness and cross-sectional shape and bleeding air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. is there.
[0231]
The door stop of the sluice gate consists of a groove-like member into which both ends of the sluice door body fits and a bottom surface where the lower surface of the door body is in close contact, and serves as a guide groove when the door body moves up and down. When it comes, it will block the flow of water together with the door. Note that rubber is attached to a surface of the door body that contacts the door stop to prevent water leakage.
[0232]
Since this door stop is also formed in the same manner as each member of the door body, it is similarly high in strength, thin, and low in cost.
[0233]
The skin plate of the gate of the sluice, the girder material of the sluice door, the gusset plate of the sluice door, or the door stop of the sluice according to the ninth aspect of the present invention is made of a molded article of carbon fiber reinforced plastic (CFRP). Things.
[0234]
CFRP has remarkably high strength among FRPs, and requires only half to 2/3 the thickness of FRP using only glass fiber, and can be reduced in weight accordingly. Carbon fiber is more expensive than glass fiber, but the amount of use can be reduced to about half, the capacity of the door opening and closing device can be set to a low load, and the construction is easy, so the overall cost is low. can do. In addition, it is extremely excellent in corrosion resistance without rusting and can be used for a long time, even if it is partially damaged, the paint does not peel off as in the case of iron, and the pigment is uniformly dispersed The appearance does not change because there is.
[0235]
The skin plate of the gate body of the floodgate, the girder material of the gate body of the floodgate, the gusset plate of the gate body of the floodgate, or the door stop of the floodgate according to the invention of claim 10 is made of a molded article of hybrid reinforced plastic (HBRP). It is.
[0236]
HBRP is an FRP in which carbon fiber and glass fiber are mixed and used in an appropriate ratio. By adjusting the mixing ratio and the amount of carbon fiber and glass fiber used, delicate strength setting becomes possible, and an appropriate Product prices can be found.
[0237]
The skin plate of the gate of the sluice, the girder material of the door of the sluice, the gusset plate of the sluice door, or the door stop of the sluice according to the eleventh aspect of the invention will be described with reference to the first to eighth aspects of the invention. And a CFRP molded article formed by using a carbon fiber in the improved hand lay-up method.
[0238]
Therefore, since the CFRP molded body is heated at a high temperature at the same time as the CFRP molded body having few voids, the curing speed is accelerated, and the strength of the CFRP molded body can be increased and the weight can be reduced. The number can be increased, leading to cost reduction.
[0239]
According to the invention of claim 12, the skin plate of the gate of the floodgate, the girder material of the gate of the floodgate, the gusset plate of the gate of the floodgate, or the door stop of the floodgate are made of carbon fiber and glass fiber by the improved hand lay-up method. It is composed of HBRP molded bodies formed by using alternately.
[0240]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by increasing or decreasing the ratio of carbon fiber to glass fiber or the number of carbon fiber / glass fiber layers, it is possible to finely set the strength and find an appropriate product price.
[0241]
The skin plate of the gate of the sluice, the girder material of the sluice door, the gusset plate of the sluice door, or the door stop of the sluice according to the invention of claim 13 is made of carbon fiber and glass fiber by the improved hand lay-up method. And an HBRP molded body formed using a hybrid cloth.
[0242]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by changing the mixing ratio of the carbon fiber and the glass fiber in the hybrid cloth, it is possible to finely set the strength and find an appropriate product price.
[0243]
The skin plate of the gate of the floodgate, the girder material of the gate of the floodgate, or the gusset plate of the gate of the floodgate according to the invention of claim 14 is the molding according to any one of claims 9 to 13, wherein Carbon fibers are laminated on the uppermost surface of the body, and the carbon fibers are projected on the surface.
[0244]
The inventor of the present invention has the structure according to any one of claims 9 to 13, wherein a carbon fiber is laminated on the uppermost surface of the molded article and the carbon fiber is projected on the surface, so that the carbon fiber grows with algae. Was found. As a result, algae and aquatic plants grow on the part of the gate body that is immersed in the water, and become part of natural waterways, rivers, lakes, marshes and coasts, and are environmentally friendly skin plates, girder materials, gussets Become a plate.
[0245]
A sluice door according to a fifteenth aspect of the present invention is a sluice door spar member according to any one of the ninth to fourteenth aspects and the sluice gate member according to any one of the ninth to fourteenth aspects. A plurality of gusset plates of the gate of the sluice are assembled to the skin plate of the gate of the sluice according to any one of claims 9 to 14.
[0246]
This makes it possible to provide a door for a floodgate that makes use of the characteristics of each material. In addition, by using a door made of the CFRP molded body as a door of a natural opening / closing type water gate for natural drainage and natural water stoppage (prevention of backflow), the movable performance can be enhanced because the door is light, It will be a natural open / close type floodgate with excellent drainage conditions and backwater prevention. In addition, the sluice door, which is made entirely of HBRP molded body, can be delicately set in strength by adjusting the mixing ratio of carbon fiber and glass fiber and the amount used, and can find an appropriate product price. In addition, the doors of floodgates where carbon fibers protrude from the surface, algae and aquatic plants grow in parts that are immersed in water, and they become part of natural waterways, rivers, lakes, marshes, and coasts. It becomes a gentle sluice door.
[0247]
The product for waterways, rivers, lakes and shores according to the invention of claim 16 or a part thereof is made of a CFRP molded body.
[0248]
By manufacturing these canals, rivers, lakes, shores, and coastal products or parts thereof with CFRP having superior strength, the strength can be further improved and the weight can be reduced. Cost can be reduced.
[0249]
The product for waterways, rivers, lakes and shores according to the invention of claim 17 or a part thereof is made of an HBRP molded body.
[0250]
By manufacturing the products for waterways, rivers, lakes, shores and shores or their parts by HBRP, it is possible to finely set the strength and find an appropriate product price.
[0251]
The product for waterways, rivers, lakes and shores according to the invention of claim 18 or a part thereof comprises a CFRP molded article formed by using an improved hand lay-up method using carbon fibers.
[0252]
Therefore, since the CFRP molded body is heated at a high temperature at the same time as the CFRP molded body having few voids, the curing speed is accelerated, and the strength of the CFRP molded body can be increased and the weight can be reduced. The number can be increased, leading to cost reduction.
[0253]
The product for waterways, rivers, lakes and shores according to the invention of claim 19 or a part thereof comprises an HBRP molded article formed by alternately using carbon fibers and glass fibers by an improved hand lay-up method.
[0254]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by increasing or decreasing the ratio of carbon fiber to glass fiber or the number of carbon fiber / glass fiber layers, it is possible to finely set the strength and find an appropriate product price.
[0255]
The product for waterways, rivers, lakes and shores according to the twentieth aspect of the present invention, or a part thereof, comprises an HBRP molded body formed by using an improved hand lay-up method using a hybrid cloth made of carbon fiber and glass fiber.
[0256]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by changing the mixing ratio of the carbon fiber and the glass fiber in the hybrid cloth, it is possible to finely set the strength and find an appropriate product price.
[0257]
The pedestrian bridge or its parts according to the invention of claim 21 is made of a CFRP molded body.
[0258]
As described above, even if a pedestrian bridge or a part thereof (a step board, a bridge girder, a column, a protective wall, a protective fence, a stair, etc., which can be walked by a person) is manufactured from the CFRP molded body, it can sufficiently bear the weight of a person. Since each component can be reduced in weight, construction is also facilitated, and the overall cost of the pedestrian bridge can be reduced. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting.
[0259]
The pedestrian bridge or its parts according to the invention of claim 22 is made of an HBRP molded body.
[0260]
As described above, even when the pedestrian bridge or its parts are manufactured from the HBRP molded body, the strength can be sufficiently endured by increasing or decreasing the mixing amount of the carbon fiber and the glass fiber and adjusting the thickness. In addition, the product becomes an appropriate product in terms of cost, and the weight of each component can be reduced, so that the construction becomes easy and the cost of the entire pedestrian bridge can be reduced. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting.
[0261]
A pedestrian bridge or a part thereof according to the invention of claim 23 is made of a CFRP molded article formed by using an improved hand lay-up method using carbon fibers.
[0262]
Therefore, since the CFRP molded body is heated at a high temperature at the same time as the CFRP molded body having few voids, the curing speed is accelerated, and the strength of the CFRP molded body can be increased and the weight can be reduced. The number can be increased, leading to cost reduction. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting.
[0263]
A pedestrian bridge or a part thereof according to the invention of claim 24 is formed of an HBRP molded body formed by alternately using carbon fibers and glass fibers by an improved hand lay-up method.
[0264]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by increasing or decreasing the ratio of carbon fiber to glass fiber or the number of carbon fiber / glass fiber layers, it is possible to finely set the strength and find an appropriate product price.
[0265]
A pedestrian bridge or a part thereof according to the invention of claim 25 is made of an HBRP molded article formed by using an improved hand lay-up method using a hybrid cloth made of carbon fiber and glass fiber.
[0266]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by changing the mixing ratio of the carbon fiber and the glass fiber in the hybrid cloth, it is possible to finely set the strength and find an appropriate product price.
[0267]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 26, which is formed using a carbon fiber, a thermosetting resin, a hardening accelerator, an additive, a pigment, and is formed of a CFRP molded body having a surface embedded with gravel. It is.
[0268]
As described above, even if the step board (portion where a person walks) of the management bridge or the pedestrian bridge is manufactured with the CFRP molded body, the strength can sufficiently withstand the weight of a human, but the CFRP molded body is a plastic having a smooth surface. Therefore, it is slippery and there is a danger of falling if a person walks on it. In particular, the danger is high when snow falls or freezes in winter. Therefore, by embedding gravel in the surface of the tread plate made of CFRP molded body, irregularities are formed on the surface to make it less slippery, and there is less danger of falling even when snow falls or freezes in winter, and strength is also improved. It will be a safe and safe footbridge for management or pedestrian bridges.
[0269]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 27, is formed by using carbon fiber, glass fiber, thermosetting resin, a curing accelerator, an additive, and a pigment, and has a surface embedded with gravel. It consists of
[0270]
As described above, even when manufacturing a footbridge of a management bridge or a pedestrian bridge using an HBRP molded body, the thickness is adjusted by increasing or decreasing the amount of carbon fiber and glass fiber mixed, so that the weight can be sufficiently applied to human weight. Although it can withstand, it becomes an appropriate product in terms of cost, but the HBRP molded body is also slippery because the surface is smooth plastic, so by embedding gravel on the surface, forming irregularities on the surface and making it hard to slip, Even when snow falls or freezes in winter, there is little danger of falling, and there is no problem in strength, and it can be used as a tread for a safe management bridge or pedestrian bridge.
[0271]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 28 is made of a CFRP molded body formed by using a carbon fiber in the improved hand lay-up method and scattering gravel on the surface in the final stage.
[0272]
Therefore, since the CFRP molded body is heated at a high temperature at the same time as the CFRP molded body having few voids, the curing speed is accelerated, and the strength of the CFRP molded body can be increased and the weight can be reduced. The number can be increased, leading to cost reduction. Further, since it is very excellent in anticorrosion properties, it can be used for a long time without rusting. Then, before the molded body is hardened at a high temperature in the final step of the hand lay-up method, gravel is scattered on the surface, so that the gravel is half embedded in the surface of the finished tread. As a result, irregularities are formed on the surface, making it difficult to slip, and preventing falling.
[0273]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 29 is made of an HBRP molded body formed by scattering gravel on the surface in the final stage using carbon fiber and glass fiber alternately in the improved hand lay-up method. is there.
[0274]
Therefore, since the HBRP molded body is heated at a high temperature at the same time as the HBRP molded body having few voids, the curing speed is accelerated, the strength of the HBRP molded body is increased, the weight can be reduced, and the molding cycle is shortened and the molding per hour is shortened. The number can be increased, leading to cost reduction. Further, by increasing or decreasing the ratio of carbon fiber to glass fiber or the number of carbon fiber / glass fiber layers, it is possible to finely set the strength and find an appropriate product price. Then, before the molded body is hardened at a high temperature in the final step of the hand lay-up method, gravel is scattered on the surface, so that the gravel is half embedded in the surface of the finished tread. As a result, irregularities are formed on the surface, making it difficult to slip, and preventing falling.
[0275]
The step board of the management bridge or the pedestrian bridge according to the invention of claim 30 is made of an HBRP molded body formed by spraying gravel on the surface in the final stage using a hybrid cloth made of carbon fiber and glass fiber in the improved hand lay-up method. Things.
[0276]
Therefore, since the HBRP molded body with few voids is heated at a high temperature at the same time as the molded body, the curing speed is accelerated, the strength of the HBRP molded body can be increased and the weight can be reduced, and the molding cycle can be shortened and the molding per hour can be performed. The number can be increased, leading to cost reduction. Further, by changing the mixing ratio of the carbon fiber and the glass fiber in the hybrid cloth, it is possible to finely set the strength and find an appropriate product price. Then, before the molded body is hardened at a high temperature in the final step of the hand lay-up method, gravel is scattered on the surface, so that the gravel is half embedded in the surface of the finished tread. As a result, irregularities are formed on the surface, making it difficult to slip, and preventing falling.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a method of forming an FRP molded body according to a first embodiment of the present invention.
FIG. 2 is a front view showing a floodgate door as an FRP product manufactured by assembling the FRP molded body according to the first embodiment of the present invention.
FIG. 3 (a) is a skin plate which is a part of a door of a floodgate which is an FRP product according to the first embodiment of the present invention, (b) is a stringer, and (c) is a stringer. (D) is a perspective view of a short cross beam, and (e) is a perspective view of a long cross beam.
FIG. 4A is a front view showing a method of assembling a skin plate, which is a part of a door body of a floodgate, which is an FRP product according to the first embodiment of the present invention, to another part, and FIG. FIG.
FIG. 5A is a view showing a structure for concealing an assembling portion of a skin plate which is a part of a door body of a floodgate which is an FRP product according to the first embodiment of the present invention, and FIG. FIG.
FIG. 6 is a perspective view showing another example of the gusset plate which is a part of the door body of the floodgate which is the FRP product according to the first embodiment of the present invention.
FIG. 7 is a perspective view showing a door stop of a water gate, which is an FRP product according to the first embodiment of the present invention, together with a door body.
FIG. 8 is a flowchart showing a method for forming a CFRP (carbon fiber reinforced plastic) formed body according to the second embodiment of the present invention.
FIG. 9A is a front view showing the entire configuration of a manually opened / closed water gate according to a second embodiment of the present invention, and FIG. 9B is a side view.
FIG. 10 is a front view showing the entire configuration of an electric opening / closing type water gate using a door body and a door stop made of a CFRP molded body according to Embodiment 3 of the present invention.
FIG. 11 is a side view showing an entire configuration of an electric switchgear and a management bridge according to a third embodiment of the present invention.
FIG. 12 is a flowchart illustrating a method of forming an HBRP (hybrid reinforced plastic) formed body according to a fourth embodiment of the present invention.
FIG. 13 is a schematic longitudinal sectional view illustrating a structure of a flap gate according to a fourth embodiment of the present invention.
FIG. 14A is a front view showing the entire configuration of a flap gate according to a fourth embodiment of the present invention as viewed from the river side, and FIG. 14B is a longitudinal sectional view.
FIG. 15 is a front view showing a configuration of a screen according to a fifth embodiment of the present invention.
FIG. 16 is a vertical sectional view showing the entire configuration of a dust remover according to a sixth embodiment of the present invention and peripheral equipment.
FIG. 17 is a plan view showing an overall configuration of a dust remover according to a sixth embodiment of the present invention.
FIG. 18 is a front view showing the entire configuration of a dust remover according to a sixth embodiment of the present invention.
FIG. 19 is a transverse sectional view showing details of a part of a dust remover according to a sixth embodiment of the present invention.
FIG. 20 is a longitudinal sectional view showing the entire configuration of a dust remover according to a sixth embodiment of the present invention.
FIG. 21A is a front view showing the entire configuration of a pedestrian bridge according to a seventh embodiment of the present invention, FIG. 21B is a plan view, and FIG. 21C is an AA top cross-sectional view of FIG. is there.
[Explanation of symbols]
1,33,50,61 Water gate door (FRP product)
2,65 Sluice gate door skin plate
3a, 4a, 5a, 14,15,66,67 Girder material for door of floodgate
3b, 16,68 Gusset plate of the door of the gate
20, 34, 48, 64 Door lock
51 culvert
53 embankment
55 Management Bridge
56 Girder materials for management bridge
57 Stepping board of management bridge
58 Protection fence of management bridge
71 screen
75 dust remover
76,78 Screen of dust remover
77 Dust Cleaner Rake
80a Belt conveyor girder
81 Corner drop
82 Dust plate for dust remover
83 Dust remover frame
84 Dust remover girder
90a Inspection stand girder
95 dust chute
101 Footbridge
110 Footbridge Footbridge
111 gravel
G1 garbage

Claims (30)

A method for forming an FRP molded body by a hand lay-up method,
The process of assembling the mold,
Applying a release agent to the inner surface of the mold,
A step of applying a gel coat over the release agent on the inner surface of the mold,
A step of heating and curing the gel coat by a heating means provided under the mold,
A step of laminating a fiber cloth and / or a fiber mat on the gel coat, a step of applying a thermosetting resin on the fiber cloth and / or the fiber mat by an application roll, and a step of applying the thermosetting resin by the heating means. Repeating the step of curing the resin at a low temperature in the range of approximately normal temperature to 50 ° C. until the molded body reaches a predetermined height;
Pressurizing means having a second heating means is provided on the upper surface of the molded body, and while applying pressure to reduce the air in the molded body to a predetermined thickness, the molded body is formed with the heating means. Heating at a high temperature in the range of approximately 50 ° C. to 140 ° C. by the second heating means;
Releasing the mold from the mold after the molded body has cooled. Method of molding FRP molded article according to claim 1, wherein the pressure applied by the pressurizing means is in the range of approximately 10~50kgf / cm ^2. An FRP product obtained by processing an FRP molded article molded by the method for molding an FRP molded article according to claim 1 or 2. Assembling the mold of the skin plate, applying a release material, further applying a gel coat, heating and curing, laminating a fiber cloth and / or a fiber mat on the gel coat, and applying a thermosetting resin to the fiber. By repeatedly applying the cloth and / or the fiber mat over the cloth and curing the thermosetting resin at a low temperature in the range of about normal temperature to 50 ° C., the fiber cloth and / or the fiber mat are brought to a predetermined height. A molded body is formed by laminating a thermosetting resin, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to a predetermined thickness, and air in the molded body is released to remove the molded body. A skin plate for a door of a floodgate formed by heating at a high temperature in a range of approximately 50C to 140C. Assembling the mold of the beam material, applying a release material, further applying a gel coat, curing by heating, laminating a fiber cloth and / or a fiber mat on the gel coat, and applying a thermosetting resin to the fiber. By repeatedly applying the cloth and / or the fiber mat on the thermosetting resin and curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C., the fiber cloth and / or the fiber mat are brought to a predetermined height. A molded body is formed by laminating a thermosetting resin, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to obtain a predetermined thickness and a sectional shape, and air in the molded body is released. A girder material for a door of a floodgate, wherein the girder material is formed by heating a molded body at a high temperature in a range of approximately 50C to 140C. Assembling the mold of the gusset plate, applying a release material, further applying a gel coat, heating and curing, laminating a fiber cloth and / or a fiber mat on the gel coat, and applying a thermosetting resin to the fiber. By repeatedly applying the cloth and / or the fiber mat over the cloth and curing the thermosetting resin at a low temperature in the range of about normal temperature to 50 ° C., the fiber cloth and / or the fiber mat are brought to a predetermined height. A molded body is formed by laminating a thermosetting resin, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to a predetermined thickness, and air in the molded body is released to remove the molded body. A gusset plate for a gate of a water gate formed by heating at a high temperature in a range of approximately 50C to 140C. The sluice gate is characterized in that a plurality of spar members of the sluice door body according to claim 5 and a plurality of gusset plates of the sluice door body according to claim 6 are assembled to the skin plate of the sluice door body according to claim 4. Door body. Assembling a mold of a component of a door stop, applying a release material, further applying a gel coat, curing by heating, laminating a fiber cloth and / or a fiber mat on the gel coat, and Is applied from above on the fiber cloth and / or fiber mat, and the thermosetting resin is cured at a low temperature in the range of approximately normal temperature to 50 ° C., so that the fiber cloth and / or A fiber mat and a thermosetting resin are laminated to form a molded body, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to obtain a predetermined thickness and a cross-sectional shape, and air in the molded body is released. Wherein the molded body is formed by heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. A skin plate for a gate of a floodgate, comprising a molded body of a carbon fiber reinforced plastic molded using carbon fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment; Lumber, gusset plate of sluice door, or sluice door stop. A skin plate for a gate of a floodgate, comprising a molded body of a hybrid reinforced plastic molded using carbon fiber, glass fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment, and a gate for a floodgate. Girder material, gusset plate of gate body of lock, or door stop of lock. Assemble skin plate, girder material, gusset plate, or door stop mold, apply release material, apply gel coat, heat and cure, carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn And / or laminating carbon fiber flakes on the gel coat, and applying a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flakes, By repeatedly curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C., a carbon fiber cloth and / or a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber are obtained until a predetermined height is reached. A flake and a thermosetting resin are laminated to form a molded body, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied thereto. The gate of the water gate is characterized in that the molded body is formed by heating the molded body at a high temperature in a range of approximately 50 ° C. to 140 ° C. Skin plate, girder material of the gate of the gate, gusset plate of the gate of the gate, or door stop of the gate. Assemble skin plate, girder material, gusset plate, or door stop mold, apply release material, apply gel coat, heat and cure, carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn And / or laminating carbon fiber flakes on the gel coat, applying a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flakes, Curing the curable resin at a low temperature in the range of about room temperature to 50 ° C., laminating a glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake on the thermosetting resin; The thermosetting resin is mixed with the glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or Alternatively, the carbon fiber cloth and / or carbon fiber may be applied to a predetermined height by repeatedly applying the resin over glass fiber flakes and curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C. A molded article is formed by laminating a mat and / or a carbon fiber yarn and / or a carbon fiber flake, the thermosetting resin, the glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake. Then, a pressure in a range of about 10 to 50 kgf / cm ² is applied to the body to obtain a predetermined thickness, air in the body is removed, and the body is heated at a high temperature in a range of about 50 to 140 ° C. A gate plate of a floodgate, a girder material of a floodgate, a gusset plate of a floodgate, or a floodgate Per door. Assemble a skin plate, a girder material, a gusset plate, or a door stop mold, apply a release material, apply a gel coat, heat and cure, and place a hybrid cloth made of carbon fiber and glass fiber on the gel coat. By laminating, applying a thermosetting resin from above the hybrid cloth, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C., the hybrid cloth is repeatedly heated to a predetermined height. Are laminated to form a molded body, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to obtain a predetermined thickness, and air in the molded body is evacuated. A skin plate of a gate of a water gate, a girder material of a door of a water gate, and a gusset play of a door of a water gate, which are formed by heating at a high temperature in a range of 140 ° C. , Or the door stop of the lock. The skin plate of a door body of a floodgate according to any one of claims 9 to 13, wherein carbon fibers are laminated on an uppermost surface of the molded body, and the carbon fibers protrude from the surface. Girder material for the gate of the gate, or gusset plate for the gate of the gate. A plurality of gusset plates of the door body of the floodgate according to any one of claims 9 to 14, and a plurality of gusset plates of the door body of the floodgate according to any one of claims 9 to 14. A floodgate door body produced by assembling with a skin plate of the floodgate door body according to any one of claims 9 to 14. A product for waterways, rivers, lakes, marshes, and shores, or a part thereof, comprising a molded product of carbon fiber reinforced plastic molded using carbon fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment. Products for waterways, rivers, lakes, marshes, and shores, or parts thereof, comprising a hybrid reinforced plastic formed using carbon fibers, glass fibers, thermosetting resins, curing accelerators, additives, and pigments. . Assemble molds for products for waterways, rivers, lakes, shores and shores or parts thereof, apply a mold release material, apply a gel coat, heat and cure, apply carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn And / or laminating carbon fiber flakes on the gel coat, and applying a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flakes, By repeatedly curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C., a carbon fiber cloth and / or a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber are obtained until a predetermined height is reached. A flake and a thermosetting resin are laminated to form a molded body, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body for a predetermined time. Water channels, rivers, lakes and marshes formed by evacuating air from the molded body and heating the molded body at a high temperature in the range of approximately 50 ° C. to 140 ° C. -Coastal products or parts thereof. Assemble molds for products for waterways, rivers, lakes, shores and shores or parts thereof, apply a mold release material, apply a gel coat, cure by heating, and use carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn. And / or laminating carbon fiber flakes on the gel coat, applying a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flakes, Curing the curable resin at a low temperature in the range of about room temperature to 50 ° C., laminating a glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake on the thermosetting resin; The thermosetting resin is mixed with the glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or glass. The carbon fiber cloth and / or carbon fiber mat and / or carbon fiber flakes are applied to the fiber flakes repeatedly until the thermosetting resin reaches a predetermined height by repeating the process of curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C. Or laminating a carbon fiber yarn and / or a carbon fiber flake, the thermosetting resin, the glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake to form a molded body, Applying a pressure in the range of approximately 10 to 50 kgf / cm ² to obtain a predetermined thickness and cross-sectional shape, bleeding air from the molded body, and heating the molded body at a high temperature in the range of approximately 50 ° C to 140 ° C A product for water courses, rivers, lakes and shores, or a part thereof, characterized in that the product is formed by: Assemble molds for products for waterways, rivers, lakes, shores and coasts or parts thereof, apply a release material, apply a gel coat, heat and cure, and place a hybrid cloth made of carbon fiber and glass fiber on the gel coat. By laminating, applying a thermosetting resin from above the hybrid cloth, and curing the thermosetting resin at a low temperature in a range of approximately normal temperature to 50 ° C., the hybrid cloth is repeatedly heated to a predetermined height. Are laminated to form a molded body, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to obtain a predetermined thickness and a cross-sectional shape, and air in the molded body is released to substantially form the molded body. A product for waterways, rivers, lakes and shores, or a part thereof, formed by heating at a high temperature in the range of 50 ° C to 140 ° C. A pedestrian bridge or a part thereof, comprising a molded carbon fiber reinforced plastic molded using carbon fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment. A pedestrian bridge or a part thereof comprising a hybrid reinforced plastic molded article molded using carbon fiber, glass fiber, thermosetting resin, curing accelerator, additive, and pigment. Assemble the mold of the pedestrian overpass or its parts, apply the release material, apply the gel coat, heat and cure, and apply the carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber flake to the above. Laminate on a gel coat, and apply a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake, and set the thermosetting resin at approximately room temperature. The thermosetting resin is laminated with the carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber flake until the predetermined height is obtained by repeating the curing at a low temperature in the range of ５０50 ° C. To form a compact, and apply a pressure in the range of approximately 10 to 50 kgf / cm ² to a predetermined thickness, A pedestrian bridge or a part thereof formed by bleeding air from the molded body and heating the molded body at a high temperature in a range of approximately 50 ° C to 140 ° C. Assemble the mold of the pedestrian overpass or its parts, apply the release material, apply the gel coat, heat and cure, and apply the carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber flake to the above. Laminate on a gel coat, apply a thermosetting resin on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake, and set the thermosetting resin at about room temperature to 50 ° C. Cured at a low temperature in the range of ° C., laminating a glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake on the thermosetting resin; Over cloth and / or fiberglass mat and / or fiberglass yarn and / or fiberglass flakes The cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber cloth and / or the carbon fiber mat are repeated until the thermosetting resin reaches a predetermined height by repeating the process of curing the thermosetting resin at a low temperature in the range of approximately normal temperature to 50 ° C. And / or laminating the carbon fiber flakes, the thermosetting resin, the glass fiber cloth and / or the glass fiber mat and / or the glass fiber yarn and / or the glass fiber flakes to form a molded body, and then forming about 10 to 50 kgf / The molded body was formed by applying a pressure in the range of cm ² to a predetermined thickness, bleeding air from the molded body, and heating the molded body at a high temperature in a range of approximately 50 ° C. to 140 ° C. And a pedestrian bridge or its parts. Assemble the mold of the pedestrian overpass or its parts, apply a release material, apply a gel coat, heat and cure, laminate a hybrid cloth made of carbon fiber and glass fiber on the gel coat, and apply a thermosetting resin. The above-mentioned hybrid cloth is applied from above, and the thermosetting resin is repeatedly cured at a low temperature in a range of approximately normal temperature to 50 ° C., thereby laminating the hybrid cloth until a predetermined height is formed to form a molded body. Then, a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the mixture to obtain a predetermined thickness, and air in the molded body is removed, and gravel is scattered on the surface. A pedestrian bridge or a part thereof formed by heating at a high temperature in the range described above. A step board for a management bridge or a pedestrian bridge, comprising a molded article of carbon fiber reinforced plastic molded using carbon fiber, a thermosetting resin, a curing accelerator, an additive, and a pigment and having a surface embedded with gravel. A management bridge or pedestrian bridge characterized by being formed of a hybrid reinforced plastic molded body formed using carbon fiber, glass fiber, thermosetting resin, curing accelerator, additive, and pigment and having a surface embedded with gravel. Treads. Assemble the mold of the step board of the management bridge or the pedestrian bridge, apply the release material, apply the gel coat, and heat and cure the carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber flake. Is laminated on the gel coat, and a thermosetting resin is applied on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake, and the thermosetting resin is By repeating the curing at a low temperature in the range of about normal temperature to 50 ° C., a carbon fiber cloth and / or a carbon fiber mat and / or a carbon fiber yarn and / or a carbon fiber flake and a thermosetting resin are obtained until a predetermined height is reached. Are laminated to form a molded body, and a pressure in a range of approximately 10 to 50 kgf / cm ² is applied to the molded body to obtain a predetermined thickness. A stepping plate for a management bridge or a pedestrian bridge, wherein the molding is formed by bleeding air from the molding, spraying gravel on the surface, and heating the molding at a high temperature in a range of approximately 50 ° C to 140 ° C. . Assemble the mold of the step board of the management bridge or the pedestrian bridge, apply a release material, apply a gel coat, and heat and cure the carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn and / or the carbon fiber flake. Is laminated on the gel coat, and a thermosetting resin is applied from above on the carbon fiber cloth and / or carbon fiber mat and / or carbon fiber yarn and / or carbon fiber flake, and the thermosetting resin is cooled to approximately room temperature. Cured at a low temperature in the range of ５０50 ° C., and laminated a glass fiber cloth and / or a glass fiber mat and / or a glass fiber yarn and / or a glass fiber flake on the thermosetting resin; Glass fiber cloth and / or glass fiber mat and / or glass fiber yarn and / or glass fiber flake The carbon fiber cloth and / or the carbon fiber mat and / or the carbon fiber yarn are repeatedly applied to the resin and cured at a low temperature in a range of about room temperature to 50 ° C. until the carbon fiber cloth and / or the carbon fiber mat become a predetermined height. And / or laminating the carbon fiber flakes, the thermosetting resin, the glass fiber cloth and / or the glass fiber mat and / or the glass fiber yarn and / or the glass fiber flakes to form a molded body, and about 10 to 50 kgf / Cm ² to a predetermined thickness by applying a pressure in the range, bleed air from the molded body, scatter gravel on the surface, and heat the molded body at a high temperature in the range of approximately 50 ° C to 140 ° C. A step board of a management bridge or a pedestrian bridge, characterized in that it is formed by: Assemble the mold of the step board of the management bridge or pedestrian bridge, apply a release material, apply a gel coat, heat and cure, and laminate a hybrid cloth made of carbon fiber and glass fiber on the gel coat, thermosetting A resin is applied from above the hybrid cloth, and the thermosetting resin is repeatedly cured at a low temperature in the range of approximately normal temperature to 50 ° C., thereby laminating the hybrid cloth until a predetermined height is reached, and forming a molded body. And applying a pressure in the range of approximately 10 to 50 kgf / cm ² to a predetermined thickness, bleeding air from the molded body, scattering gravel on the surface, and cooling the molded body to approximately 50 ° C. A step board for a management bridge or pedestrian bridge formed by heating at a high temperature in the range of 140 ° C.

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