JP2006124971A - Handrail part or handrail formed of frp formed body and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail manufacturable at low cost by pressuring type hand lay up method, having high weather resistance and high strength, light in weight, easily transportable and installable, durable for a long period, and formed of an FRP formed body and a method of manufacturing the handrail. <P>SOLUTION: A core 2A is manufactured by using a PVC pipe far smaller than an elbow pipe 2, a glass fiber cloth 2a is wrapped therearound, a thermosetting resin 2b (containing hardening agent and hardening promoting agent) is applied on the entire surface thereof, and these steps are repeated until the formed body 2 is formed in a prescribed size. After a releasing agent is applied onto the inner surface of a steel compression mold 10 comprising a cope 10A and a drag 10B, a gel coat agent is applied thereto and heated and hardened. Then, the formed body 2C is pushed into the drag 10B and the cope 10A is put thereon. All projected parts 12A and 12B are fixed with bolts 13 and nuts 14, and the entire part of the formed body 2C is uniformly compressed and hardened. After that, the completed elbow pipe 2 is removed from the compression mold 10. In the same manner, a tee-pipe and a straight pipe are manufactured, and they are combined with each other to manufacture the handrail formed of the FRP formed body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a handrail of a bridge such as a management bridge or an iron bridge made of an FRP (fiber reinforced plastic) molded body by a hand lay-up method that is low in price and excellent in aesthetics and strength, a handrail of an operation table, or a part thereof, and a manufacturing method thereof Is. In this specification, claims, and abstract, the term “handrail” includes handrails such as bridges, railings, railings, fences, and the like.

  As a molding method of a high-strength FRP molded body, a hand lay-up method in which an operator manually laminates a fiber material such as a glass fiber cloth and a thermosetting resin with a coating roll while putting them in a mold alternately, A continuous molding method in which a fiber mat described in Patent Document 1 is heat-cured through a mold and a heating furnace while impregnating a resin, and a fiber mat is formed using a mold and a press described in Patent Document 2. There are various molding methods, such as a heat-pressure molding method in which the resin is cut and set in accordance with the mold, and the resin is poured onto the mold.

  On the other hand, a sluice door that opens and closes a waterway such as a river has recently been made of an FRP molded body. In the continuous molding method, it is difficult to form a door body reinforced with a complicated girder, 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 can be molded, and several products of uniform quality can be obtained. Various sizes and shapes differ depending on the size. In the heat and pressure molding method, one expensive mold must be prepared to make one door body, which is practically impossible.

On the other hand, the hand lay-up method is inexpensive in mold material and has no restriction on the size of the molded product. Therefore, it is suitable for high-mix low-volume production of various sluice doors of different sizes and shapes. Therefore, the present inventor has disclosed a method for producing an FRP molded body by a heating / pressurizing hand lay-up method in Patent Document 3 in order to compensate for the disadvantage of the hand lay-up method that the product strength is inferior. . Since the FRP molded body by this manufacturing method has extremely high strength, there are various lengths, heights and shapes, and it is necessary to apply heat / pressure type handlays to handrails such as bridges and operation tables that require strength. It is considered that an FRP molded body by the up method can be applied.
JP-A-8-25395 JP 2000-176953 A JP 2004-42610 A

  However, handrails that are usually manufactured by combining round pipes or square pipes are different from solid members such as skin plates, girders, gusset plates, door stops, and treads as disclosed in Patent Document 3 above. It is not easy to apply high pressure. So far, it has not been possible to manufacture handrails made of FRP molded bodies by the heat and pressure hand lay-up method.

  Then, this invention makes it a subject to provide the handrail which consists of a FRP molded object which is high intensity | strength lightly and is easy to convey and construct by the heat-press type hand lay-up method, and its manufacturing method.

  The handrail component comprising the FRP molded body according to the invention of claim 1 is the handrail component comprising the FRP molded body, wherein the hollow core material of the handrail component includes a fiber cloth and / or a fiber mat and / or a fiber yarn and / or A molded body comprising a procedure of winding fiber flakes and a step of applying a thermosetting resin containing a curing agent and a curing accelerator from above the fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake by an application roll. Is repeated until the thickness reaches a predetermined thickness, and a release agent is applied to the inner surface of the compression mold for the component, a gel coat is applied from above the release agent on the inner surface of the compression mold, and the gel coat is heated. The molded body is cured by pressing the molded body into the compression mold and heating at a temperature equal to or higher than normal temperature with pressure applied from the surroundings. That.

  A handrail made of the FRP molded body according to the invention of claim 2 is a straight hand made of an FRP molded body having an outer diameter substantially the same as the inner diameter of the hollow core member of the handrail component made of the FRP molded body according to claim 1. An adhesive is applied to the surface of the tubular connection member, inserted and connected to both handrail parts made of the FRP molded body to be connected, assembled into the shape of the handrail, and the connection portion is subjected to a surface treatment and covered. It is something that is hidden.

  The handrail part made of the FRP molded body or the handrail made of the FRP molded body according to the invention of claim 3 is an L-shaped part (elbow tube) in the structure of claim 1 or claim 2. , T-shaped parts (cheese pipes), I-shaped parts (straight pipes).

  The handrail part comprising the FRP molded body or the handrail comprising the FRP molded body according to the invention of claim 4 is the structure according to any one of claims 1 to 3, wherein the hollow core material is made of hard polyvinyl chloride. It is made by processing a pipe.

  The handrail component made of the FRP molded body according to the invention of claim 5 is a handrail component made of an FRP molded body, and a square cross section formed by combining a pair of L-shaped plate members made of a high-strength material with the plate materials. A mold release agent is applied to an inner mold having a substantially square cross section, which is fixed so as to be sandwiched between round pipes made of a high-strength material having a larger outer diameter than the inscribed circle. A fiber cloth and / or a fiber mat and / or fiber yarn and / or fiber flakes, and a thermosetting resin containing a curing agent and a curing accelerator, the fiber cloth and / or fiber mat and / or fiber yarn and / or Alternatively, the procedure of applying from the top of the fiber flakes with the application roll is repeated until the molded body has a predetermined thickness, and high strength is applied to apply pressure to each of the four surfaces of the molded body. A mold release agent is applied to the inner surface of the outer mold made of the above material, and a gel coat is further applied thereon to be cured by heating, and the molded body is placed in the outer mold to The molded body is cured by heating at a temperature equal to or higher than room temperature in a state where pressure is applied to the four surfaces, and the cured FRP molded body is taken out from the outer mold together with the inner mold, and the round constituting the inner mold The pipe is extracted, and the pair of L-shaped plate members are moved inward to release them from the inner surface of the cured FRP molded body.

  A handrail made of the FRP molded body according to the invention of claim 6 is formed in the shape of the handrail by connecting the square pipe-shaped handrail parts made of the FRP molded body according to claim 5, and the connection portion is surface-treated. Then it is covered.

  The manufacturing method of the handrail component which consists of a FRP molded object concerning the invention of Claim 7 produces the hollow core material of the handrail component which comprises each part of a handrail, and a fiber cloth and / or fiber in the said hollow core material A procedure for winding a mat and / or fiber yarn and / or fiber flake, and a thermosetting resin containing a curing agent and a curing accelerator are applied on the fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake. A step of repeating the procedure of applying with a roll until the molded body has a predetermined thickness, and applying a release agent to the inner surface of the compression mold for the handrail part, and from above the release agent on the inner surface of the compression mold Applying a gel coat and heating and curing the gel coat; and pressing the molded body into the compression mold and applying pressure from the surroundings at a temperature above room temperature Those comprising the step of taking out the step of curing the molded product, cured the molded body from the compression mold.

  The manufacturing method of the handrail made of the FRP molded body according to the invention of claim 8 is substantially the same as the inner diameter of the hollow core material of the handrail component made of the FRP molded body constituting each part of the handrail of claim 7. A straight tubular connecting member made of an FRP molded body having a diameter, and an adhesive is applied to the surface of the connecting member and inserted into both handrail parts made of the FRP molded body to be connected. And a step of assembling into the shape of the handrail and a step of covering and concealing the connecting portion.

  According to the ninth aspect of the present invention, there is provided a manufacturing method of a handrail component made of an FRP molded body or a manufacturing method of a handrail made of an FRP molded body, wherein the handrail component made of the FRP molded body is L It is a letter-shaped part (elbow pipe), a T-shaped part (cheese pipe), or an I-shaped part (straight pipe).

  A method for manufacturing a handrail component made of an FRP molded body or a method for manufacturing a handrail made of an FRP molded body according to the invention of claim 10 is the structure according to any one of claims 7 to 9, wherein the hollow core material is It is made by processing a pipe made of rigid polyvinyl chloride.

  A method for manufacturing a handrail component made of an FRP molded body according to the invention of claim 11 is a method in which a pair of L-shaped plate members made of a high-strength material is outside an inscribed circle of a square cross-section formed by combining the plate materials. A step of forming an inner mold having a substantially square cross section by covering and fixing it on a round pipe made of a high strength material having a large diameter, and a mold release on the outside of the pair of L-shaped plate members A step of applying an agent, a procedure of winding fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake around the inner mold, and a thermosetting resin containing a curing agent and a curing accelerator as the fiber cloth and / or Alternatively, a process of applying the coating from the top of the fiber mat and / or fiber yarn and / or fiber flakes with an application roll until the molded body has a predetermined thickness and the four surfaces of the molded body. A step of applying a release agent to the inner surface of the outer mold made of a high-strength material for applying each pressure, and further applying a gel coat on the outer mold and heating and curing the mold; And the step of curing the molded body by heating at a temperature equal to or higher than room temperature with pressure applied to the four surfaces of the molded body, and taking out the cured FRP molded body together with the inner mold from the outer mold. Removing the round pipe constituting the inner mold from the cured FRP molded body, and releasing the pair of L-shaped plate members inside from the inner surface of the cured FRP molded body. And a step of extracting.

  A method for manufacturing a handrail made of an FRP molded body according to the invention of claim 12 is formed in the shape of the handrail by connecting square pipe-shaped handrail parts made of the FRP molded body according to claim 5 or 11. And a step of covering and concealing the connecting portion by surface treatment.

  The handrail component comprising the FRP molded body according to the invention of claim 1 is prepared by preparing a hollow core material of components constituting each part of the handrail, winding a fiber cloth or the like around the hollow core material, a curing agent, Repeat the procedure of applying a thermosetting resin containing a curing accelerator from above a fiber cloth or the like with an application roll until the molded body has a predetermined thickness, and apply a release agent to the inner surface of the compression mold for the part, Apply the gel coat from the mold release agent on the inner surface of the compression mold, heat and cure the gel coat, press the molded body into the compression mold and heat it at room temperature or higher with pressure applied from the surroundings. The body is cured.

  As described above, the procedure of applying a thermosetting resin by wrapping a fiber (glass fiber, carbon fiber, etc.) cloth or the like around the hollow core material of the parts constituting each part of the handrail is repeated, and the laminate by the hand lay-up method Is formed around the core material, and is pressed into a compression mold and cured while applying pressure from the surroundings, so that parts constituting each part of a handrail made of a strong FRP molded body whose surface is covered with a gel coat layer can be obtained. .

  Although all the hollow core material remains in the handrail, it is a feature of the handrail made of the FRP molded body by constructing the core material from a light and non-corrosive material such as a plastic pipe. Without impairing the lightness, it can be a handrail that has a long service life and does not increase costs.

  In this way, a handrail component made of an FRP molded body having a high weather resistance, a high strength, a light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  A handrail made of the FRP molded body according to the invention of claim 2 is a straight tube made of an FRP molded body having an outer diameter substantially the same as the inner diameter of the hollow core material of the handrail component made of the FRP molded body of claim 1. An adhesive is applied to the surface of the connecting member, inserted and connected to both handrail parts made of the FRP molded body to be connected, assembled into the shape of a handrail, and the connection portion is surface-treated and covered. is there.

  That is, after that, these handrail parts are assembled into a predetermined handrail shape by applying an adhesive to the surface of a straight tubular connecting member made of an FRP molded body and inserting it into a hollow core. Thus, the handrail made of the FRP molded body having high strength is completed by covering the line appearing at the connection part between the parts with a putty or the like to cover and conceal the line.

  In this way, a handrail made of an FRP molded body having a high weather resistance, a high strength, a light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  In the handrail part or handrail made of the FRP molded body according to the invention of claim 3, the parts constituting each part of the handrail are an L-shaped part (elbow pipe), a T-shaped part (cheese pipe), and an I-shaped part (straight pipe). is there. That is, elbow tubes are used for the corners at both ends of the handrail, cheese tubes are used for the portions constituting the vertical or horizontal partitions, and straight tubes are used for the other straight portions. Is. Here, the height and width of the handrail can be freely set by changing the length of the straight pipe. In this way, by constructing the handrail with the minimum necessary parts, the type of the compression mold can be minimized and the cost can be reduced.

  In this way, a handrail part or handrail made of an FRP molded body with a low cost, high weather resistance, high strength, light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  The handrail component or handrail made of the FRP molded body according to the invention of claim 4 is obtained by processing a pipe made of hard polyvinyl chloride as a hollow core material. Rigid polyvinyl chloride is a general-purpose plastic that has excellent mechanical strength and chemical resistance and is used in various applications including pipes. Therefore, a pipe having a required outer diameter and thickness can be obtained at a low cost, and it is easy to form an elbow tube or a cheese tube by cutting and bonding the pipe. Furthermore, since it does not corrode, even if it is left in the handrail made of the finished FRP compact, it does not affect the life of the handrail.

  In this way, a handrail part or handrail made of an FRP molded body with a low cost, high weather resistance, high strength, light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  The handrail component comprising the FRP molded body according to the invention of claim 5 has a larger outer diameter than a pair of L-shaped plate members made of a high-strength material and an inscribed circle of a square cross-section formed by combining the plate materials. A procedure in which a release agent is applied to an inner mold having a substantially square cross section, which is fixed so as to be sandwiched between round pipes made of a long, high-strength material, and a fiber cloth or the like is wound around the inner mold, and a curing agent And a procedure of applying a thermosetting resin containing a curing accelerator from above a fiber cloth or the like with a coating roll until the molded body has a predetermined thickness, and high strength for applying pressure to each of the four surfaces of the molded body A mold release agent is applied to the inner surface of the outer mold made of the above material, and a gel coat is further applied thereon to be cured by heating, and the molded body is placed in the outer mold on the four surfaces of the molded body. Heat at room temperature or higher with pressure applied FRP molded body cured by curing the shape, taking out the cured FRP molded body from the outer mold together with the inner mold, extracting the round pipe constituting the inner mold, and bringing a pair of L-shaped plate members inside. The mold is released from the inner surface.

  As a cross-sectional shape of the handrail, there is a case where a square pipe is required instead of a round pipe. In such a case, for example, as in the invention of claim 4, a rigid polyvinyl chloride pipe is used as the center of the square pipe. It is not practical because it is difficult to obtain due to low demand and is expensive.

  Therefore, a round pipe made of a high-strength material is fixed so as to be sandwiched between a pair of cross-sectional L-shaped plates made of a high-strength material to form an inner mold having a substantially square cross-sectional shape on the outer periphery. The laminate has a predetermined procedure for applying a release agent to the outer surface of the plate material and winding the fiber cloth, etc., and applying a thermosetting resin containing a curing agent and a curing accelerator from the fiber cloth etc. with an application roll. Repeat until the thickness reaches the thickness of the outer mold, apply a release agent / gel coat to the inner surface of the outer mold made of high-strength material, heat and cure the gel coat, and set the inner mold with the laminate in the outer mold. Then, the thermosetting resin is cured while applying pressure from the four surfaces of the laminate. As a result, a square pipe component made of a strong FRP molded body whose surface is covered with a gel coat layer can be obtained.

  In this way, a handrail component made of an FRP molded body with a low cost, a high weather resistance, a high strength, a light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  A handrail made of the FRP molded body according to the invention of claim 6 is formed by connecting the square pipe-shaped handrail parts made of the FRP molded body of claim 5 to the shape of the handrail, and surface-treating the connecting portion. It is something that is covered up.

  That is, if a plurality of square pipe parts made of a high strength FRP molded body are manufactured, assembled into a predetermined handrail shape and bonded and fixed, a handrail made of a high strength FRP molded body is obtained. The connecting part is slid out with a putty or the like to make it look invisible. Since the square pipe part has a flat surface, the end face of another square pipe part can be abutted and bonded, and when it is desired to make it longer, a short square pipe part that is slightly smaller as in the invention of claim 2 is used. It can be manufactured and connected.

  In this way, a handrail made of an FRP molded body with a low cost, a high weather resistance, a high strength, a light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  A method for manufacturing a handrail component comprising an FRP molded body according to the invention of claim 7 includes a step of producing a hollow core material of a handrail component constituting each part of the handrail, and a procedure of winding a fiber cloth or the like around the hollow core material, And a step of applying a thermosetting resin containing a curing agent and a curing accelerator from a fiber cloth or the like with a coating roll until the molded body has a predetermined thickness, and an inner surface of a compression mold for handrail parts Applying a mold release agent, applying a gel coat from above the mold release agent on the inner surface of the compression mold, heating the gel coat to cure, and pressing the molded body into the compression mold and applying pressure from the surroundings The method comprises a step of curing the molded body by heating at a temperature equal to or higher than normal temperature, and a step of taking out the cured molded body from the compression mold.

  As described above, the procedure of applying a thermosetting resin by wrapping a fiber (glass fiber, carbon fiber, etc.) cloth or the like around the hollow core material of the parts constituting each part of the handrail is repeated, and the laminate by the hand lay-up method Is formed around the core material, and is pressed into a compression mold and cured while applying pressure from the surroundings, so that parts constituting each part of a handrail made of a strong FRP molded body whose surface is covered with a gel coat layer can be obtained. .

  Although all the hollow core material remains in the handrail parts, the core material is composed of light, non-corrosive, and inexpensive materials such as plastic pipes. Without impairing a certain lightness, it is possible to provide a method for manufacturing a handrail part that has a long service life and does not increase costs.

  In this way, a handrail part manufacturing method comprising an FRP molded body having a high weather resistance, a high strength, a light weight, easy transportation and construction, and a long service life is obtained by a heat and pressure type hand lay-up method.

  The manufacturing method of the handrail which consists of a FRP molded object concerning the invention of Claim 8 has an outer diameter substantially the same as the internal diameter of the hollow core material of the handrail component which consists of a FRP molded object which comprises each part of the handrail of Claim 7. The shape of the handrail is made by applying an adhesive to the surface of the connecting member and inserting and connecting it to both handrail parts made of the FRP molded body to be connected. And a process of covering and concealing the connection portion.

  That is, these parts are assembled into a predetermined handrail shape by applying an adhesive to the surface of a straight tubular connecting member made of an FRP molded body, and inserting and connecting them into a hollow core. A handrail made of an FRP molded body with high strength is manufactured by covering and concealing the line appearing at the connecting portion with a putty or the like to improve the appearance.

  In this way, a handrail manufacturing method comprising an FRP molded body having a high weather resistance, a high strength, a light weight, easy transportation and construction, and a long service life is obtained by a heat and pressure type hand lay-up method.

  The manufacturing method of the handrail part which consists of a FRP molded object concerning the invention of Claim 9, or the manufacturing method of the handrail which consists of a FRP molded object, the handrail part which consists of a FRP molded object is an L-shaped part (elbow pipe), a T-shaped part (cheese) Tube) and I-shaped parts (straight pipe). That is, elbow tubes are used for the corner portions at both ends of the handrail, cheese tubes are used for the parts constituting the vertical or horizontal partition, and handrails are manufactured using straight tubes for the other straight portions. Is. Here, the height and width of the handrail can be freely set by changing the length of the straight pipe. Thus, by manufacturing the handrail with the minimum necessary parts, the type of the compression mold can be minimized and the cost can be reduced.

  In this way, a method for manufacturing a handrail component or handrail made of an FRP molded body having high weather resistance, high strength, light weight, easy transportation and construction, and a long service life is obtained by a heat and pressure hand lay-up method.

  According to a tenth aspect of the present invention, there is provided a method for manufacturing a handrail component made of an FRP molded body or a method for manufacturing a handrail made of an FRP molded body, wherein the hollow core material is formed by processing a pipe made of hard polyvinyl chloride. Rigid polyvinyl chloride is a general-purpose plastic that has excellent mechanical strength and chemical resistance and is used in various applications including pipes. Therefore, a pipe having a required outer diameter and thickness can be obtained at a low cost, and it is easy to form an elbow tube or a cheese tube by cutting and bonding the pipe. Furthermore, since it does not corrode, even if it is left in the handrail made of the finished FRP compact, it does not affect the life of the handrail.

  In this way, the manufacturing method of a handrail part or handrail made of an FRP molded body with a low cost, high weather resistance, high strength, light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure type hand layup method.

  According to the eleventh aspect of the present invention, there is provided a method for manufacturing a handrail component made of an FRP molded body. A step of forming an inner mold having a substantially square cross section by covering and fixing it on a round pipe made of a large and long high-strength material, and a mold release agent on the outside of the pair of L-shaped plate members The step of applying, the procedure of winding a fiber cloth or the like around the inner mold, and the procedure of applying a thermosetting resin containing a curing agent and a curing accelerator with a coating roll from above the fiber cloth etc. to a predetermined thickness Repeat the process until it becomes, and apply a release agent to the inner surface of the outer mold made of a high-strength material to apply pressure to each of the four surfaces of the molded body, and then apply a gel coat on it to heat and cure And the molded body in the outer mold Putting the pressure on the four sides of the molded body and heating it at a temperature above room temperature to cure the molded body, removing the cured FRP molded body from the outer mold together with the inner mold, and cured FRP molding A step of extracting a round pipe constituting the inner mold from the body and releasing it from the inner surface of the cured FRP molded body by bringing a pair of L-shaped plate members to the inside.

  As the cross-sectional shape of the handrail, there is a case where a square pipe is required instead of a round pipe. In such a case, for example, as in the invention of claim 10, a rigid polyvinyl chloride pipe is used as a core. It is not practical because it is difficult to obtain due to low demand and is expensive.

  Therefore, a round pipe made of a high-strength material is fixed so as to be sandwiched between a pair of cross-sectional L-shaped plates made of a high-strength material to form an inner mold having a substantially square cross-sectional shape on the outer periphery. The laminate has a predetermined procedure for applying a release agent to the outer surface of the plate material and winding the fiber cloth, etc., and applying a thermosetting resin containing a curing agent and a curing accelerator from the fiber cloth etc. with an application roll. Repeat until the thickness reaches the thickness of the outer mold, apply a release agent / gel coat to the inner surface of the outer mold made of high-strength material, heat and cure the gel coat, and set the inner mold with the laminate in the outer mold. Then, the thermosetting resin is cured while applying pressure from the four surfaces of the laminate. As a result, a square pipe component made of a strong FRP molded body whose surface is covered with a gel coat layer can be manufactured.

  In this way, a handrail part manufacturing method comprising an FRP molded body with a low cost, high weather resistance, high strength, light weight, easy transportation and construction, and a long service life is obtained by the heat and pressure hand lay-up method.

  The manufacturing method of the handrail which consists of a FRP molded object concerning the invention of Claim 12 connects the square pipe-shaped handrail parts which consist of a FRP molded object, and forms the shape of a handrail, and covers and covers the connection part. And a step of concealing. That is, if a plurality of rectangular pipe parts made of a high strength FRP molded body are manufactured, assembled into a predetermined handrail shape and bonded and fixed, a handrail made of a high strength FRP molded body can be manufactured. The connecting part is slid out with a putty or the like to make it look invisible. Since the square pipe part has a flat surface, the end face of another square pipe part can be abutted and bonded, and when it is desired to make it longer, a short square pipe part that is slightly smaller as in the invention of claim 8 is used. It can be manufactured and connected.

  In this way, a handrail manufacturing method comprising an FRP molded body with a low cost, high weather resistance, high strength, light weight, easy transportation and construction, and a long service life is achieved by the heat and pressure hand lay-up method.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
First, a handrail component and handrail made of the FRP molded body according to the first embodiment of the present invention and a manufacturing method thereof will be described with reference to FIGS. 1 to 4.

  FIG. 1 is a front view showing an overall configuration of a handrail made of an FRP molded body according to Embodiment 1 of the present invention. 2 (a), (b), (c), and (d) are explanatory views showing a method of manufacturing an L-shaped part (elbow tube) of a handrail made of the FRP molded body according to the first embodiment of the present invention. . 3 (a), 3 (b), and 3 (c) are explanatory diagrams showing a method for manufacturing a T-shaped part (cheese tube) of a handrail made of the FRP molded body according to the first embodiment of the present invention. 4 (a) and 4 (b) are explanatory views showing a method for connecting the L-shaped part and the T-shaped part of the handrail made of the FRP molded body according to the first embodiment of the present invention.

  As shown in FIG. 1, a handrail 1 made of an FRP molded body according to the first embodiment includes a hollow cross-sectional cylindrical L-shaped part (elbow tube) 2, a T-shaped part (cheese tube) 3, and an I-shape. The parts (straight pipes) 4 and 5 are connected by a connecting portion 6 indicated by a broken line, and the concave portion of the connecting portion 6 is filled with a putty so as not to be seen. The width of the handrail 1 can be increased freely by increasing the length of the straight tube 4 and sandwiching the straight tube between each pair of cheese tubes 3 forming two intermediate horizontal bars. Can do.

  Next, a method for manufacturing each component will be described. First, a manufacturing method of the L-shaped part (elbow tube) 2 will be described with reference to FIG. As shown in Fig. 2 (a), two pieces of pipes of hard polyvinyl chloride (hereinafter also referred to as "PVC") that are slightly smaller than the outer diameter of the elbow pipe 2 are connected at right angles. The core material 2A of the elbow tube 2 is slightly smaller than the elbow tube 2. A glass fiber cloth (roving cloth) 2a is wound around the entire PVC core material 2A, and a thermosetting resin 2b (with a curing agent and a curing accelerator) is applied to the entire surface of the PVC core material 2A. 2a is wound, and the thermosetting resin 2b is applied over the entire surface, and this is repeated until the molded body 2C has a predetermined thickness.

  In Embodiment 1, an unsaturated polyester resin is used as the thermosetting resin 2b. However, other thermosetting resins such as an epoxy resin can also be used. Further, FIG. 2 (a) is shown to be shifted to show a state in which the glass fiber cloth 2a and the thermosetting resin 2b are alternately laminated. The cross body 2B is formed by alternately laminating the cloth 2a and the thermosetting resin 2b.

  Apart from this operation, a steel compression mold 10 comprising an upper mold 10A and a lower mold 10B is prepared as shown in FIG. 2 (b). The upper mold 10A and the lower mold 10B are provided with a plurality of projecting portions 12A and 12B having through holes for tightening with nuts through bolts on the upper mold body 11A and the lower mold body 11B having the same inner diameter as the outer diameter of the elbow tube 2. It is made by welding. After a release agent is applied to the inner surfaces of the upper mold 10A and the lower mold 10B, a gel coat agent is applied and cured by heating.

  Then, as indicated by the imaginary line, the molded body 2C is pushed into the lower mold 10B, and the upper mold 10A is covered as shown in FIG. 2 (c), and the bolts 13 are passed through all the projecting portions 12A and 12B. All the bolts 13 and nuts 14 are tightened little by little so that the entire inner molded body 2C is uniformly compressed, so that the upper mold 10A and the lower mold 10B are closely fitted. In this state, the compact 2C inside the compression mold 10 is heated. For heating, hot air from a jet heater may be applied, or heating may be performed at a higher temperature (up to about 140 ° C.) in a dedicated heating case. Further, when there is no urgency, a laminate of the molded body 2C is obtained because a curing agent and a curing accelerator are mixed in the thermosetting resin 2b even if it is left at room temperature overnight without being heated. 2B is fully cured.

  Thus, after hardening the laminated body 2B at high temperature or normal temperature, all the bolts 13 and nuts 14 are removed, and the elbow pipe 2 completed from the upper mold | type 10A and the lower mold | type 10B is removed. Since the release agent is applied to the inner surfaces of the upper mold 10A and the lower mold 10B, the mold can be released smoothly. In this way, the elbow tube 2 having a very smooth surface made of the FRP molded body whose surface is covered with the gel coat film as shown in FIG. 2D is obtained. The PVC core material 2A remains in the elbow tube 2, but the PVC core material 2A is extremely light, so it does not impair the light feature of the FRP molded product, and it does not increase the cost because it is inexpensive. . And since the intensity | strength of the elbow pipe 2 is based on the laminated body 2B which hardened | cured, even if PVC core material 2A and the laminated body 2B are not closely_contact | adhering, there is no problem at all.

  Next, a manufacturing method of the T-shaped part (cheese tube) 3 will be described with reference to FIG. As shown in FIG. 3A, two PVC pipes that are slightly smaller than the outer diameter of the cheese tube 3 are connected in a T-shape to form a core material 3 </ b> A of the cheese tube 3 that is slightly smaller than the cheese tube 3. A glass fiber cloth 3a is wound around the entire PVC core 3A, a thermosetting resin 3b (with a curing agent and a curing accelerator) is applied over the entire surface, and further a glass fiber cloth 3a is wound thereon. From there, the thermosetting resin 3b is applied to the entire surface, and this is repeated until the molded body 3C has a predetermined thickness.

  Also here, the unsaturated polyester resin is used as the thermosetting resin 3b, but other thermosetting resins such as an epoxy resin can also be used. Further, FIG. 3 (a) is shown in a shifted manner to show a state in which the glass fiber cloth 3a and the thermosetting resin 3b are alternately laminated. In practice, the glass fiber is entirely applied to the PVC core material 3A. The cloth 3B is formed by alternately laminating the cloth 3a and the thermosetting resin 3b.

  Apart from this operation, as shown in FIG. 3B, a steel compression mold 15 comprising an upper mold 15A and a lower mold 15B is prepared. The upper die 15A and the lower die 15B are provided with a plurality of protrusions 12A and 12B having through holes for tightening with nuts through bolts on the upper die body 16A and the lower die body 16B having the same inner diameter as the outer diameter of the cheese tube 3. It is made by welding. After a release agent is applied to the inner surfaces of the upper mold 15A and the lower mold 15B, a gel coating agent is applied and cured by heating.

  Then, as indicated by an imaginary line, the molded body 3C is pushed into the lower mold 15B, covered with the upper mold 15A, and all the projecting portions 12A, 12B are fastened with the nuts 13 through the bolts 13, and the molded body 3C inside All the bolts 13 and nuts 14 are tightened little by little so that the whole is uniformly compressed, and fixed so that the upper die 15A and the lower die 15B are closely aligned. In this state, the internal molded body 3C together with the compression die 15 is heated or left at room temperature for a long time to completely cure the laminated body 3B.

  Thus, after hardening the laminated body 3B at high temperature or normal temperature, all the bolts 13 and nuts 14 are removed, and the completed cheese tube 3 is removed from the upper mold | type 15A and the lower mold | type 15B. Since the release agent is applied to the inner surfaces of the upper mold 15A and the lower mold 15B, the mold can be released smoothly. In this way, a cheese tube 3 having a very smooth surface made of an FRP molded body whose surface is covered with a gel coat film as shown in FIG. 3C is obtained. The PVC core material 3A remains in the cheese tube 3. However, the PVC core material 3A is extremely lightweight, so that it does not impair the light feature of the FRP molded product, and it does not increase the cost because it is inexpensive. . And since the intensity | strength of the cheese tube 3 is based on the laminated body 3B which hardened | cured, even if PVC core material 3A and the laminated body 3B are not closely_contact | adhering, there is no problem at all.

  Similarly, straight pipes 4 and 5 are cut to a predetermined length to make a core material, and a laminated body is formed by alternately laminating glass fiber cloth and thermosetting resin on the entire core material. On the other hand, an upper die and a lower die formed by welding a plurality of projecting portions having through holes for tightening with nuts through bolts to an upper die main body and a lower die main body having the same inner diameter as the outer diameter of the straight pipes 4 and 5 After a release agent is applied to the inner surface of the resin, a gel coat agent is applied and cured by heating. Then, press the molded body into the lower mold and cover the upper mold, and tighten all the bolts and nuts little by little so that the entire molded body inside is compressed evenly with bolts through all the protruding parts. And fix the upper and lower molds so that they fit together. In this state, the molded body inside the compression mold is heated or left at room temperature for a long time to completely cure the laminate.

  Thus, after hardening a laminated body at high temperature or normal temperature, all bolts and nuts are removed, and the complete straight pipes 4 and 5 are removed from an upper mold | type and a lower mold | type. Since the release agent is applied to the inner surfaces of the upper mold and the lower mold, the mold can be released smoothly. Thus, straight pipes 4 and 5 made of an FRP molded body having a very smooth surface covered with a gel coat film are obtained.

  In this way, the elbow tube 2, the cheese tube 3, and the straight tubes 4 and 5 made of the FRP molded body that is a part of the handrail 1 are manufactured. Next, a method for connecting these components will be described with reference to FIG. 4 taking the connection between the elbow tube 2 and the cheese tube 3 as an example.

  First, as shown in FIG. 4A, a connection member 9 for connecting the elbow tube 2 and the cheese tube 3 is produced. The connecting member 9 is also a straight pipe made of an FRP molded body, but is different from the above-described elbow pipe 2, cheese pipe 3, and straight pipes 4 and 5 in that it is not compressed by the compression mold. That is, a laminated body is formed by alternately laminating glass fiber cloth and a thermosetting resin on a PVC pipe that is slightly smaller than the connecting member 9, and is cured as it is. As a result, the surface of the connecting member 9 is not smooth like the elbow tube 2, the cheese tube 3, and the straight tubes 4 and 5 described above, and unevenness is generated, so that a resistance that increases the connecting force acts.

  An adhesive is applied to the surface of the connecting member 9, and the inner hole of the elbow tube 2 (that is, the inner hole of the PVC core material 2A) and the inner hole of the cheese tube 3 (that is, the inner hole of the PVC core material 3A) The end surface 2D of the elbow tube 2 and the end surface 3D of the cheese tube 3 are brought into close contact with each other. Here, the adhesive is also applied to the end surface 2D of the elbow tube 2 and the end surface 3D of the cheese tube 3. Thus, as shown in FIG. 4B, the elbow tube 2 and the cheese tube 3 are connected at the connection portion 6. As described above, the design is improved by embedding putty in the connecting portion 6 so as not to be seen.

  The other elbow tube 2, the cheese tube 3, and the connection part 6 of the straight tubes 4 and 5 are similarly connected using the connection member 9, thereby completing the handrail 1 shown in FIG.

  In this way, by compressing the molded bodies 2C and 3C (laminates 2B and 3B) using the compression molds 10 and 15, the elbow tube 2 and cheese having a predetermined strength and a smooth appearance excellent in design. The pipe 3 and the straight pipes 4 and 5 can be produced, and by connecting them, the handrail 1 made of an FRP molded body having a predetermined appearance and a smooth appearance excellent in design can be produced.

  In the first embodiment, an example in which a hard polyvinyl chloride pipe is processed as a hollow core material has been described. However, other plastic pipes having some strength may be used.

Embodiment 2
Next, a handrail component and handrail made of the FRP molded body according to the second embodiment of the present invention, and a manufacturing method thereof will be described with reference to FIGS.

  FIG. 5: is a perspective view which shows the whole structure of the handrail which consists of a FRP molded object concerning Embodiment 2 of this invention. FIG. 6A is a front view showing the structure of the inner mold for manufacturing the handrail made of the FRP molded body according to the second embodiment of the present invention, and FIG. 6B is a perspective view. Fig.7 (a) is a front view which shows the manufacturing process of the handrail which consists of a FRP molded object concerning Embodiment 2 of this invention, (b) is a perspective view. Fig.8 (a) is a front view which shows the structure of the outer mold | type for manufacturing the handrail which consists of a FRP molded object concerning Embodiment 2 of this invention, (b) is a perspective view. FIGS. 9A, 9B and 9C are explanatory views showing a procedure for extracting from the FRP molded body showing the inner mold for manufacturing the handrail made of the FRP molded body according to the second embodiment of the present invention. .

  As shown in FIG. 5, when the handrail 20 constituted by a square pipe is required instead of the handrail 1 constituted by a round pipe as described in the first embodiment, depending on the place of use and the preference of the installer. There is also. However, a rigid polyvinyl chloride (PVC) square pipe is difficult to obtain because it does not have much use, and the manufacturing method described in the first embodiment is not practical. Therefore, in the manufacturing method of the handrail 20 made of the FRP molded body according to the second embodiment, as shown in FIG. 5, the square pipe 21 made of the FRP molded body is manufactured by another method, and these corners are manufactured. FRP molding is performed by connecting the pipes 21 at the connecting portion 24, supporting the lower part with an angle 22 made of FRP for further reinforcement, and attaching a round pipe 23 made of an FRP molded body that also serves as reinforcement and decoration. The handrail 20 which consists of a body is manufactured.

  A manufacturing method of the square pipe 21 made of these FRP compacts will be described with reference to FIGS. The square pipe 21 is formed using an inner mold and an outer mold that can be extracted from the FRP molded body. The inner mold 25 of the square pipe 21 shown in FIG. 6 is constituted by a steel round pipe 27, a pair of L-shaped steel plates 26 fixed to the outside thereof, and two sets of bolts 28 and nuts 29 for fixing them. Has been. The outer diameter of the round pipe 27 and the thickness of the L-shaped steel plate 26 are such that the outer surface of the L-shaped steel plate 26 becomes the inner dimension of the square pipe 21 when the L-shaped steel plate 26 is fixed to the outside of the round pipe 27. Is set to

  The steel round pipe 27 has an outer diameter larger than the diameter of an inscribed circle having a square cross section formed by combining a pair of L-shaped steel plates 26. As a result, when the round pipe 27 is pulled out, a gap is formed between the pair of L-shaped steel plates 26, the mold can be released from the inner surface of the square pipe 21 made of the FRP molded body, and the pair of L-shaped steel plates 26. The shaped steel plate 26 can be easily pulled out from the square pipe 21.

  Through holes are drilled in the vicinity of both ends of the pair of L-shaped steel plates 26, and through holes penetrating the round pipe 27 are also drilled at two locations of the corresponding steel round pipes 27. The inner mold 25 is assembled as shown in FIG. 6A by aligning the positions of these through holes and inserting the bolts 28 as shown in FIG.

  Next, as shown in FIG. 7, FRP is laminated with the inner mold 25 as a core. That is, a release agent is applied to the surface of the L-shaped steel plate 26 of the inner mold 25, and a glass fiber cloth (roving cloth) is first wound, and then a thermosetting resin (with a curing agent and a curing accelerator) is applied over the entire surface. Further, a glass fiber cloth is wound from above, and a thermosetting resin is coated on the entire surface, and this is repeated a predetermined number of times, that is, until a predetermined number of roving cloths are wound around the laminated body 21A.

  On the other hand, the outer mold 30 shown in FIG. 8 is prepared. The outer mold 30 has three support frames 32 fixed to a steel surface plate 31, and each support frame 32 is provided with an upper pressing rod 33 and a pair of side pressing rods 34. ing. The upper pressing rod 33 and the side pressing rod 34 advance by turning clockwise (clockwise) to apply a pressing force to the U-shaped plate 35 on the side surface and the upper plate 36 on the upper surface. A release agent is applied to the inner surface of the U-shaped plate 35, the lower surface of the upper plate 36, and the surface of the surface plate 31 that is below the upper plate 36, and then a gel coat is applied from above to the surface plate. It is heated and cured by a heater built in 31.

  7 is formed on the surface plate 31 between the pair of U-shaped plates 35 and the upper plate 36, as indicated by an imaginary line in FIG. The upper pressing rod 33 and the side pressing rod 34 are rotated clockwise (clockwise) while being gradually heated by a heater built in the surface plate 31 and placed on the U-shaped plate 35 and the upper plate 36. The laminated body 21A is pressurized by applying a pressing force. When a predetermined pressure and temperature are applied to the laminated body 21A for a predetermined time, the outer mold 30 is allowed to cool, and when the temperature of the laminated body 21A decreases to a certain degree, the upper pressing rod 33 and the side pressing rod 34 are turned counterclockwise ( The counter-clockwise rotation is released to release the pressing force, and the inner die 25 is lowered from the surface plate 31 together with the laminated body 21A, and further cooled.

  When the laminated body 21A (the completed square pipe 21) has cooled to approximately room temperature, as shown in FIG. 9 (a), first, the two sets of bolts 28 and nuts 29 are removed, and then shown in FIG. 9 (b). As shown, the steel round pipe 27 is pulled out. As a result, a gap is formed between the pair of L-shaped steel plates 26, so that the pair of L-shaped steel plates 26 can be separated from the inner wall of the square pipe 21, and as shown in FIG. The L-shaped steel plate 26 can be pulled out from the square pipe 21. In this way, the square pipe 21 made of the FRP molded body is completed, and the handrail 20 as shown in FIG. 5 can be manufactured by combining the plurality of square pipes 21.

  Since the square pipe 21 has a flat surface, the end face of another square pipe 21 can be abutted and strongly bonded, and when it is desired to make it longer, a square pipe made of a short FRP molded body that is slightly smaller is manufactured. And connect them together.

  In the second embodiment, steel is used as a high-strength material, but stainless steel, other metals, high-strength ceramics such as alumina, silicon nitride, and silicon carbide, and the like can also be used.

  In each of the above embodiments, the case where an unsaturated polyester resin is used as the thermosetting resin has been described. However, other thermosetting resins such as an epoxy resin can also be used.

  Further, in each of the above embodiments, an example in which a glass fiber cloth is used as the fiber has been described. However, a glass fiber mat, a glass fiber yarn, a glass fiber flake, or the like can be used together or in place thereof. The glass fiber, the glass fiber and the carbon fiber may be used alternately, or the glass fiber and the carbon fiber may be mixed and used.

  In carrying out the present invention, the structure, shape, quantity, material, size, connection relationship, etc. of other parts of the handrail made of the FRP molded body, and other steps of the manufacturing method of the handrail made of the FRP molded body Is not limited to the above embodiments.

FIG. 1 is a front view showing an overall configuration of a handrail made of an FRP molded body according to Embodiment 1 of the present invention. 2 (a), (b), (c), and (d) are explanatory views showing a method of manufacturing an L-shaped part (elbow tube) of a handrail made of the FRP molded body according to the first embodiment of the present invention. . 3 (a), 3 (b), and 3 (c) are explanatory diagrams showing a method for manufacturing a T-shaped part (cheese tube) of a handrail made of the FRP molded body according to the first embodiment of the present invention. 4 (a) and 4 (b) are explanatory views showing a method for connecting the L-shaped part and the T-shaped part of the handrail made of the FRP molded body according to the first embodiment of the present invention. FIG. 5: is a perspective view which shows the whole structure of the handrail which consists of a FRP molded object concerning Embodiment 2 of this invention. FIG. 6A is a front view showing the structure of the inner mold for manufacturing the handrail made of the FRP molded body according to the second embodiment of the present invention, and FIG. 6B is a perspective view. Fig.7 (a) is a front view which shows the manufacturing process of the handrail which consists of a FRP molded object concerning Embodiment 2 of this invention, (b) is a perspective view. Fig.8 (a) is a front view which shows the structure of the outer mold | type for manufacturing the handrail which consists of a FRP molded object concerning Embodiment 2 of this invention, (b) is a perspective view. FIGS. 9A, 9B and 9C are explanatory views showing a procedure for extracting from the FRP molded body showing the inner mold for manufacturing the handrail made of the FRP molded body according to the second embodiment of the present invention. .

Explanation of symbols

1,20 Handrail 2 L-shaped part 2A, 3A Core material 2B, 3B, 21A Laminate 2C, 3C Molded body 3 T-shaped part 4, 5 I-shaped part 6, 24 Connection part 9 Connection member 10, 15 Compression mold 21 Angle Pipe 25 Inner mold 26 L-shaped steel plate 27 Round pipe 30 Outer mold

Claims (12)

In handrail parts consisting of FRP molded bodies,
A procedure of winding a fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake around the hollow core material of the handrail component, and a thermosetting resin containing a curing agent and a curing accelerator as the fiber cloth and / or The procedure of applying from the top of the fiber mat and / or fiber yarn and / or fiber flakes with an application roll is repeated until the molded body has a predetermined thickness, and a release agent is applied to the inner surface of the compression mold for the part. Apply, apply a gel coat from above the mold release agent on the inner surface of the compression mold, heat and cure the gel coat, press the molded body into the compression mold and apply pressure from the surroundings at room temperature or higher A handrail component comprising a FRP molded body, wherein the molded body is cured by heating at a temperature of 5 ° C.   Applying an adhesive to the surface of a straight tubular connecting member made of an FRP molded body having an outer diameter substantially the same as the inner diameter of the hollow core material of the handrail part made of the FRP molded body according to claim 1, A handrail made of an FRP molded body, wherein the handrail is inserted and connected to both of the handrail parts made of the FRP molded body, assembled into the shape of the handrail, and the connection portion is subjected to a surface treatment to cover it.   The handrail part made of the FRP molded body is an L-shaped part (elbow pipe), a T-shaped part (cheese pipe), or an I-shaped part (straight pipe). The handrail which consists of a handrail component or the FRP molded object of Claim 2.   The handrail part or FRP comprising the FRP molded body according to any one of claims 1 to 3, wherein the hollow core material is formed by processing a pipe made of hard polyvinyl chloride. A handrail made of compacts. In handrail parts consisting of FRP molded bodies,
A pair of L-shaped plates made of a high-strength material are sandwiched between round plates made of a high-strength material having a larger outer diameter than the inscribed circle of the square cross-section formed by combining the plates. A step of applying a release agent to an inner mold having a substantially square cross section formed by covering and fixing, and winding a fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake around the inner mold; and a curing agent And a procedure of applying a thermosetting resin containing a curing accelerator on the fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flakes with an application roll until the molded body has a predetermined thickness. A mold release agent is applied to the inner surface of the outer mold made of a high-strength material for applying pressure to each of the four surfaces of the molded body, a gel coat is further applied thereon, and heated to hard The molded body is put in the outer mold and heated at a temperature equal to or higher than normal temperature in a state where pressure is applied to the four surfaces of the molded body to cure the molded body, and the cured FRP molded body Is taken out from the outer mold together with the inner mold, the round pipe constituting the inner mold is extracted, and the pair of L-shaped plate members are brought inward to release from the inner surface of the cured FRP molded body. A handrail component made of an FRP molded body.   From the FRP molded body formed by connecting the square pipe-shaped handrail parts made of the FRP molded body according to claim 5 to form the shape of the handrail, and covering and concealing the connection portion. Handrail to become. A step of producing a hollow core material of a handrail component constituting each part of the handrail;
A procedure of winding a fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake around the hollow core material, and a thermosetting resin containing a curing agent and a curing accelerator as the fiber cloth and / or fiber mat and / or Or the process of repeating the procedure of applying with a coating roll from the top of the fiber yarn and / or fiber flakes until the molded body has a predetermined thickness,
Applying a release agent to the inner surface of the compression mold for the handrail component, applying a gel coat from above the release agent on the inner surface of the compression mold, and heating and curing the gel coat;
A step of pressing the molded body into the compression mold and applying pressure from the surroundings to heat the molded body by heating at a temperature of room temperature or higher; and
And a step of taking out the cured molded body from the compression mold. A method for manufacturing a handrail component comprising an FRP molded body. A step of producing a straight tubular connecting member made of an FRP molded body having an outer diameter substantially the same as an inner diameter of the hollow core member of the handrail component made of the FRP molded body constituting each part of the handrail according to claim 7; ,
Applying an adhesive to the surface of the connecting member, inserting and connecting both of the handrail parts made of the FRP molded body to be connected, and assembling into the shape of the handrail;
A method of manufacturing a handrail made of an FRP molded body, comprising a step of covering and concealing the connection portion.   The handrail part made of the FRP molded body is an L-shaped part (elbow pipe), a T-shaped part (cheese pipe), or an I-shaped part (straight pipe). The manufacturing method of a handrail part or the manufacturing method of the handrail which consists of a FRP molded object of Claim 8.   10. The manufacture of a handrail component comprising an FRP molded body according to any one of claims 7 to 9, wherein the hollow core material is formed by processing a pipe made of hard polyvinyl chloride. The manufacturing method of the handrail which consists of a method or a FRP molded object. Cover a pair of L-shaped plate members made of high-strength material on a round pipe made of high-strength material whose outer diameter is larger and longer than the inscribed circle of the square cross-section formed by combining the plate materials. A step of fixing and forming an inner mold having a substantially square cross section;
Applying a release agent to the outside of the pair of cross-sectional L-shaped plates;
A procedure of winding a fiber cloth and / or fiber mat and / or fiber yarn and / or fiber flake around the inner mold, and a thermosetting resin containing a curing agent and a curing accelerator as the fiber cloth and / or fiber mat and / or fiber. Repeating the procedure of applying from the top of the yarn and / or fiber flakes with an application roll until the compact has a predetermined thickness;
Applying a release agent to the inner surface of the outer mold made of a high-strength material for applying pressure to each of the four surfaces of the molded body, further applying a gel coat thereon and heating and curing;
Placing the molded body in the outer mold and curing the molded body by heating at a temperature equal to or higher than room temperature in a state where pressure is applied to the four surfaces of the molded body;
Removing the cured FRP molded body from the outer mold together with the inner mold;
Extracting the round pipe constituting the inner mold from the cured FRP molded body, and releasing the mold from the inner surface of the cured FRP molded body by bringing the pair of L-shaped plate members inward. The manufacturing method of the handrail component which consists of a FRP molded object characterized by comprising. Connecting a square pipe-shaped handrail component made of the FRP molded body according to claim 5 or 11 to form the shape of the handrail;
A method of manufacturing a handrail made of an FRP molded body, comprising a step of covering and concealing a connection portion.

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