WO2011122179A1 - Fiber-reinforced plastic molding, production method therefor, and elevator - Google Patents

Abstract

Disclosed is a fiber-reinforced plastic molding that is thin with high rigidity and has excellent sound absorbency and sound insulation. The fiber-reinforced plastic molding (1) is equipped with an open-cell foam material (2) that absorbs sound waves, a hard closed-cell foam material (3) covering the surfaces of the open-cell foam material (2), and a fiber-reinforced plastic (4) that reflects sound waves and is disposed on both sides of the hard closed-cell foam material (3), wherein the open-cell foam material (2) is exposed to the outside through openings (5) formed in the hard closed-cell foam material (3) and the fiber-reinforced plastic (4), and sound waves that enter through the openings (5) are absorbed by the open-cell foam material (2).

Description

FIBER-REINFORCED PLASTIC MOLDED BODY, ITS MANUFACTURING METHOD, AND ELEVATOR

The present invention relates to a fiber reinforced plastic molded article having excellent sound insulation and sound absorbing properties, a manufacturing method thereof, and an elevator using the fiber reinforced plastic molded article for a car wall and a wind conditioned cover.

Fiber Reinforced Plastics (FRP) is attracting attention in various industrial fields as a lightweight and high-strength material.
As a structure capable of realizing high rigidity, a sandwich structure in which FRP skin plates are arranged on both surfaces of a core material is known.
As the core material used for the sandwich structure, a multi-porous material is often used from the viewpoint of securing light weight and the like.
Multi-porous materials are classified into closed cells composed of closed cells and open cells composed of open cells. A closed cell body is excellent in heat insulation and sound insulation (for example, refer patent document 1).
On the other hand, an open cell body is excellent in heat insulation and sound absorption (for example, refer patent document 2).
Some closed cell bodies are hard and have high compressive strength. By using this hard closed cell body as a core material, a sandwich structure excellent in rigidity, heat insulation and sound insulation can be obtained.

Furthermore, in recent years, in order to produce a relatively large sandwich structure at a low cost, a vacuum impregnation molding method (VaTM: Vacuum assist Resin Transfer Molding) for producing a sandwich structure in a reduced pressure environment by vacuum suction is being adopted. .
In the vacuum impregnation molding method, the fiber placed in the mold is covered with a bag film, the bag film is vacuumed, a liquid resin is injected into the bag film, the fiber is impregnated into the fiber and cured, and then molded. In this method, the mold is removed to obtain an FRP molded body. And the method of manufacturing the FRP molded object which is a sandwich structure which combined the core material which consists of a closed cell body, and the skin material which consists of FRP using this VaRTM method is known (for example, refer patent document 3). ).

On the other hand, a sound-absorbing and sound-insulating composite structure is known as a method effective for noise countermeasures.
The sound-absorbing and sound-insulating composite structure is a combination of a sound-absorbing material and a sound-insulating material to prevent air-borne sound.
In other words, the sound absorbing material prevents sound reflection by absorbing sound waves, prevents an increase in sound pressure level due to sound wave reflection on the sound source side, and the sound insulating material has no function of absorbing sound. By reflecting the noise, it has a function of blocking noise propagating in the air (see, for example, Patent Document 4).

Japanese Patent Laid-Open No. 2001-132156 JP 58-099188 A JP-A-11-159056 JP 61-15216 A

However, the sandwich structure in which the FRP skin plates are arranged on both surfaces of the core material made of hard closed cells has high compressive strength and excellent sound insulation, but has poor sound absorption.
On the other hand, since open cells having excellent sound absorption generally have a low compressive strength, hard closed cells were used even when used as a sandwich structure in which FRP skin plates are arranged on both sides of a core material made of open cells. Compared to the sandwich structure, it cannot contribute to higher rigidity.
In addition, when a sandwich structure using an open cell body is manufactured by using the VaRTM method, the open cell body is impregnated with resin, and the lightness and sound absorption are deteriorated.

In view of this, a structure in which an open-cell body having excellent sound-absorbing property is attached to one side of a sandwich structure in which the core material is a closed-cell body having excellent sound-insulating properties is conceivable.
In this case, although a highly rigid sound-absorbing / insulating composite structure can be obtained, it requires a process of adhering or fixing the open cell to one side of the sandwich structure, and has a thickness for obtaining rigidity and sound insulation. Thickness is required to obtain sound absorption, and there is a problem that the entire structure becomes a thick sound absorbing and sound insulating composite structure.

An object of the present invention is to solve the above problems, and is a thin-walled, high-rigidity, fiber-reinforced plastic molded article excellent in sound absorption and sound insulation, a method for producing the same, and The present invention provides an elevator using the fiber-reinforced plastic molded body for a car wall and a wind-control cover.

The fiber reinforced plastic molded body according to the present invention comprises an open cell body, a hard closed cell body covering the open cell body, and a fiber reinforced plastic provided on at least both surfaces of the hard closed cell body, The open cell body is exposed to the outside through an opening formed in the hard closed cell body and the fiber reinforced plastic.

Further, the method for producing a fiber-reinforced plastic molded body according to the present invention includes a hard closed cell covering step for covering the entire surface of the open cell body with the hard closed cell body, and a step for covering the hard closed cell body with a reinforcing fiber. A step of covering the reinforcing fiber with a bag film, a pressure reducing step of reducing the pressure inside the bag film, a liquid resin is injected into the bag film, and the reinforcing fiber is impregnated with a resin and Curing the impregnated resin to form the fiber reinforced plastic; and drilling the hard closed cell body and the fiber reinforced plastic to form the opening.

Further, in the method for producing a fiber-reinforced plastic molded body according to the present invention, the hard closed cell covering step includes a hard closed cell body including a hard closed cell block, a first flat plate portion, and a second flat plate portion. Drilling a hard closed cell block to form a plurality of holes and the support, inserting each divided part into a plurality of divided parts from the open cell, and open cell And covering both surfaces with the first flat plate portion and the second flat plate portion.

Further, the elevator according to the present invention has a car wall made of a fiber-reinforced plastic molded body.

Also, the elevator according to the present invention is made of a fiber reinforced plastic molded body, and has an air conditioning cover that is attached to the upper and lower parts of the car and rectifies the air flow when the car is running.

The fiber-reinforced plastic molded body according to the present invention includes a surface where the open cell body is exposed and a surface where the open cell body is not exposed, and the surface where the open cell body is exposed is because the open cell body absorbs sound waves. High sound absorption characteristics can be obtained. On the other hand, since the fiber reinforced plastic and the hard closed cell reflect sound waves on the surface where the open cell body is not exposed, high sound insulation characteristics can be obtained.
Moreover, since the fiber reinforced plastic is arrange | positioned on both surfaces of the hard closed cell body, high rigidity is acquired.

In the manufacturing method of the fiber-reinforced plastic molded body according to the present invention, since the open cell body is covered with the hard closed cell body in the manufacturing process, the open cell body is not impregnated with the resin. As a result, even if a sandwich structure is manufactured using the VaRTM method, the open cell body is not impregnated with resin, and the VaRTM method provides a lightweight, low-priced and sound-insulating FRP molded product at low cost. can do.

Further, in the method for producing a fiber-reinforced plastic molded body according to the present invention, the hard closed cell covering step includes a hard closed cell body including a hard closed cell block, a first flat plate portion, and a second flat plate portion. Drilling a hard closed cell block to form a plurality of holes and support portions; inserting each divided portion into a plurality of divided portions from the open cell body; and And having a step of covering both surfaces with the first flat plate portion and the second flat plate portion, a highly rigid fiber-reinforced plastic molded body can be easily manufactured.

In the elevator according to the present invention, since the car wall is made of a fiber reinforced plastic molded body, wind noise from the outside of the car is cut off, and sound is absorbed so that conversation in the car does not sound.

Further, in the elevator according to the present invention, since the wind regulation cover is made of a fiber-reinforced plastic molded body, wind noise from outside the car is insulated.

It is sectional drawing which shows the fiber reinforced plastic molding by Embodiment 1 of this invention. It is explanatory drawing explaining the sound insulation and sound absorption in the fiber reinforced plastic molding of FIG. It is arrow sectional drawing along the III-III line of FIG. It is arrow sectional drawing along the IV-IV line of FIG. It is sectional drawing which shows the manufacturing process of the fiber reinforced plastic molding of FIG. It is sectional drawing which shows the manufacturing process of the fiber reinforced plastic molding of FIG. It is sectional drawing which shows the manufacturing process of the fiber reinforced plastic molding of FIG. It is sectional drawing which shows the manufacturing process of the fiber reinforced plastic molding of FIG. It is a plane sectional view which shows the fiber reinforced plastic molding of Embodiment 2 of this invention. It is sectional drawing which shows the fiber reinforced plastic molding by Embodiment 3 of this invention. It is sectional drawing which shows the fiber reinforced plastic molding by Embodiment 4 of this invention. It is sectional drawing which shows the modification of the fiber reinforced plastic molding by Embodiment 4 of this invention. It is a schematic sectional drawing which shows the elevator by Embodiment 5 of this invention. It is sectional drawing which shows the site | part of the arrow A of FIG. It is sectional drawing which shows the site | part of the arrow B of FIG. It is a perspective view which shows the wind regulation cover of FIG. It is sectional drawing which shows the hard closed cell which is a component of the wind regulation cover of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a cross-sectional view showing a fiber-reinforced plastic molded body 1 (hereinafter abbreviated as an FRP molded body) according to Embodiment 1 of the present invention.
The FRP molded body 1 includes an open cell body 2, a hard closed cell body 3 covering the open cell body 2, and a fiber reinforced plastic (hereinafter referred to as “6”) provided on the entire surface (6 surfaces) of the hard closed cell body 3. (Abbreviated as FRP). The FRP 4 is impregnated and cured with a resin.
A plurality of openings 5 arranged as shown in FIG. 3 are formed on the lower surface of the FRP molded body 1, and the open cell body 2 is electrically connected to the outside through the openings 5.
The rigid closed cell body 3 is formed by forming the open cell body 2 into a quadrangular shape as shown in FIG. 5, the upper flat plate portion 3 a being the first flat portion, the lower flat plate portion 3 b being the second flat portion, and FIG. 4. It is comprised from the support part 3c divided into the division part 2a.

Here, as FRP4 which is a skin material, carbon fiber, glass fiber, Zylon fiber, Kepler fiber and the like are not particularly limited, but carbon fiber reinforced plastic capable of maximizing lightness and strength. Is preferred. Moreover, as a fiber, the textile fabric which consists of a long fiber, for example, a unidirectional material, and a cloth material, are preferable.
As the hard closed cell body 3, hard foams such as phenol, polyurethane, and polyolefin can be used. Among these, flame retardant phenol foam is preferable.
As the open cell body 2, glass wool, urethane foam or the like having a high sound absorption coefficient can be used.

Next, a method for manufacturing the FRP molded body 1 having the above configuration will be described with reference to FIGS.
First, a flat hard closed cell block having a flat plate shape is cut into four squares to form holes H, and a support portion 3c of the hard closed cell 3 is obtained.
Next, the support part 3c is mounted on the lower flat plate part 3b, and the divided part 2a of the open cell body 2 is inserted into the hole of the support part 3c.
Thereafter, the upper flat plate portion 3a is placed on the support portion 3c (see FIG. 5).
At this time, the lower flat plate portion 3b and the support portion 3c, and the support portion 3c and the upper flat plate portion 3a may not be bonded in advance. In the subsequent decompression step, the lower flat plate portion 3b and the upper flat plate portion 3a are pressed inward at atmospheric pressure and brought into close contact with each other, and the resin 14 enters and adheres to the respective interfaces in the next step. At this time, the resin 14 does not reach the open cell body 2.
However, when the area of each interface is large, in order to increase the rigidity as the sandwich structure, the lower flat plate portion 3b and the support portion 3c, and the support portion 3c and the upper flat plate portion 3a are preliminarily connected with the resin 14. It is better to adhere.

After the hard closed cell covering step for covering the entire surface (6 surfaces) of the open cell body 2 with the hard closed cell 3, the entire surface of the hard closed cell 3 is covered with FRP 4, and the peel ply 10 is a resin-permeable release material. A flow medium 11 as a permeation assisting material and a bagging film 12 that enables vacuum are sequentially covered.
Thereafter, the inside of the bagging film 12 is depressurized by the operation of the vacuum pump 13.
Next, the resin 14 stored in the resin tank 15 is injected into the bagging film 12, and the FRP 4 is impregnated with the resin 14 (see FIG. 6).
At this time, since the entire open cell body 2 is covered with the hard closed cell body 3, the resin 14 does not penetrate into the open cell body 2.
Next, the resin 14 impregnated in the FRP 4 is cured.
In addition, the code | symbol 16 of FIG. 6 is a valve | bulb.

Next, the peel ply 10, the flow media 11, and the bagging film 12 are removed to obtain a semi-finished product of the FRP molded body 1 in which the opening 5 is not formed as shown in FIG.

Next, as shown in FIG. 8, drilling is performed on one side of the semi-finished product to form the opening 5, thereby completing the product of the FRP molded body 1.
The FRP resin 14 is not particularly limited, but is preferably a thermosetting resin such as a vinyl ester resin, a polyester resin, an epoxy resin, a cyanate resin, a phenol resin, or a polyimide resin. Among these, vinyl ester resins that can be cured at room temperature and have low viscosity and excellent impregnation properties are preferred from the viewpoint of moldability. Furthermore, a vinyl ester resin imparted with flame retardancy is preferable.

In the FRP molded body 1 according to this embodiment, the surface where the open cell body 2 is exposed to the outside in FIG. 2 is the inside, and the surface which is covered with the hard closed cell body 3 and the open cell body 2 is not exposed is the outside. Then, sound waves generated from the inside enter through the opening 5 and are absorbed by the open cell body 2. Therefore, the reflected sound can be reduced.
In addition, sound waves generated from the outside are reflected by the FRP 4 and the hard closed cell 3. Therefore, it is possible to reduce the amount transmitted to the inside.
That is, the FRP molded body 1 has excellent sound insulation on the outer surface and excellent sound absorption on the inner surface. Therefore, the FRP molded body 1 out of the sound waves generated outside on the inside of the FRP molded body 1 The amount of transmitted sound waves is small, and among the sound waves generated inside, the amount of sound waves reflected inside is also small, so the effect of noise countermeasures is great.

Moreover, since the support part 3c functions as a support column with respect to the pressing force in the vertical direction, the FRP molded body 1 has high rigidity in the compression direction.

Moreover, in the manufacturing process of the fiber reinforced plastic molded body 1, since the open cell body 2 is covered with the hard closed cell body 3, the open cell body 2 is not impregnated with the resin.
Therefore, even if a sandwich structure is manufactured using the VaRTM method, the open cell body 2 is not impregnated with resin, and the VaRTM method makes it possible to reduce the weight of the FRP molded body 1 excellent in sound absorption and sound insulation. Can be provided.

In addition, the hard closed cell covering step includes forming a hard closed cell block out of the hard closed cell formed of the hard closed cell block, the upper flat plate portion 3a, and the lower flat plate portion 3b, so that a plurality of holes H are formed. And a step of forming the support portion 3c, a step of inserting each divided portion 2a divided into a plurality of portions from the open cell body 2 into each hole H, and an upper flat plate portion 3a and a lower side of both sides of the open cell body 2 And the step of covering with the flat plate portion 3b, the FRP molded body 1 having high rigidity can be easily manufactured.

Embodiment 2. FIG.
FIG. 9 is a plan sectional view showing an FRP molded body 1A according to Embodiment 2 of the present invention.
In this embodiment, in the FRP molded body 1A, the hard closed-cell body 3A has the open-cell body 2 partitioned into triangular divided portions 2a by the support portions 3Ac.
Other configurations are the same as those of the first embodiment.

The FRP molded body 1A according to this embodiment has higher rigidity than the FRP molded body 1 when the area of the hard closed cell 3A is the same as that of the hard closed cell 3 according to the first embodiment.
Other functions and effects are the same as those of the FRP molded body 1 of the first embodiment.

Embodiment 3 FIG.
FIG. 10 is a cross-sectional view showing an FRP molded body 1B according to Embodiment 3 of the present invention. In this embodiment, a thin metal film 20 made of aluminum is attached to the upper and lower surfaces of the FRP 4 using an adhesive 21. Yes.
Other configurations are the same as those of the first embodiment.

In the FRP molded body 1B of this embodiment, the metal thin film 20 is attached to the upper surface and the lower surface, so that rigidity and flame retardancy can be further enhanced as a sandwich structure as compared with the first embodiment.
In addition, you may affix the metal thin film 20 only on one side.
Other functions and effects are the same as those of the FRP molded body 1 of the first embodiment.

Embodiment 4 FIG.
FIG. 11 is a cross-sectional view showing an FRP molded body 1C according to Embodiment 4 of the present invention. In this embodiment, the opening 5A has a trapezoidal shape in which the cross-sectional shape along the center line is expanded outward.
Other configurations are the same as those of the first embodiment.

In the FRP molded body 1C of this embodiment, the opening 5A has a trapezoidal shape, and has a larger area toward the outside as compared with the opening 5 of the first embodiment having a quadrangular cross section. Can absorb sound waves.
Other functions and effects are the same as those of the FRP molded body 1 of the first embodiment.

In addition, as shown in FIG. 12, the opening 5 </ b> B may extend to the inside of the open cell body 2.
By doing in this way, the FRP molded object 1C in which the opening part 5B was formed can absorb more sound waves compared with the opening part 5A of FIG.

In each of the first to fourth embodiments, the flat cross-sectional shape of the openings 5, 5A, 5B is circular, but may be another shape such as a triangle or a quadrangle. Furthermore, the frequency of the sound wave to be absorbed can be changed by adjusting the aperture.
In each of the first to fourth embodiments, the upper, lower, and side surfaces of the hard closed cells 3, 3A are covered with fiber reinforced plastic, but the fibers are formed only on the upper and lower surfaces of the hard closed cells 3, 3A. A reinforced plastic may be provided.
Further, in each of the first to fourth embodiments, the open cell body 2 has the support portions 3c and 3Ac, but it may be an FRP molded body having no support portion inside. In this case, the portions of the hard closed cells 3 and 3A covering the peripheral side surface of the open cell 2 contribute to increasing the rigidity in the compression direction.

Embodiment 5 FIG.
13 is a sectional view showing an elevator 22 according to a fifth embodiment of the present invention.
The car of the high-speed elevator 22 includes a car floor 23 and a car wall 24.
A wind regulation cover 25 shown in FIG. 16 is attached to the upper and lower parts of the car to rectify the air flow during traveling.
An electric device 26 such as a blower covered with a wind regulation cover 25 is provided on the upper portion of the car.

FIG. 14 is a cross-sectional view showing a portion indicated by an arrow A in FIG. 13, and the wind regulation cover 25 is constituted by the FRP molded body 1 shown in FIG. 1, and an opening 5 is formed inside.
FIG. 15 is a cross-sectional view showing a part indicated by an arrow B in FIG. 13, and the car wall 24 is also constituted by the FRP molded body 1 shown in FIG. Moreover, the design board 4 comprised, for example with metal foil is attached to inner FRP4.

In the elevator 22 according to this embodiment, since the car wall 24 is composed of the FRP molded body 1, wind noise from the outside of the car is sound-insulated by the FRP 4 and the hard closed cell body 3. Moreover, since sound waves such as conversation in the car are absorbed by the open cell body 2 exposed through the opening 5, the sound of sound such as conversation in the car is suppressed.
When the FRP molded body 1 is applied to the car wall 24 as it is, the opening 5 is exposed to the outside and is not aesthetically pleasing. In this embodiment, the design plate 27 covers the opening 5. And does not detract from the beauty. Further, since the design plate 27 is made of a thin metal foil, it has almost no sound insulating function, and sound waves are absorbed by the open cell body 2 through the opening 5.

Further, since the wind regulation cover 25 is also composed of the FRP molded body 1, wind noise from outside the car is sound-insulated by the FRP 4 and the hard closed cell body 3. Moreover, the noise of the electric equipment 26 such as a blower disposed inside the air conditioning cover 25 is absorbed by the open cell body 2 through the opening 5, and the transmission of noise into the car is suppressed.

Next, a manufacturing method of the cap-shaped air conditioning cover 25 having a curved surface will be described.
In manufacturing the wind regulation cover 25 having an enormous curved surface on each surface, a curved mold is first prepared, and a structure is formed (set) on the mold.
As shown in FIG. 6, this structure is covered with the open cell 2 in the order of the hard closed cell 3, the FRP 4, the peel ply 10, the flow media 11, and the bagging film 12.
About this structure, the inside of the bagging film 12 is depressurized by the operation of the vacuum pump 13, and then the resin 14 is injected into the bagging film 12, the resin 14 is impregnated into the FRP 4, and the resin 14 is cured.
Next, the peel ply 10, the flow media 11, and the bagging film 12 are removed to obtain a structure in which the opening 5 is not formed.

Next, drilling is performed on one side of the structure to form the opening 5, thereby completing the wind regulation cover 25 constituted by the FRP molded body 1.

The flow media 11, the peel ply 10, the bagging film 12, the FRP 4 and the open cell body 2 can be easily bent into a curved mold, while the hard closed cell 3 is bent at room temperature. It is difficult to shape.
In particular, thermosetting such as phenol foam cannot be bent by heating.

In the wind regulation cover 25, in order to enable the bending of the hard closed-cell body 3, as shown in FIG. 17, it extends in the direction perpendicular to the bending direction on the surface of the inner hard closed-cell body 3. A plurality of grooves 28 are formed at intervals.
However, in order not to lose the function of preventing resin impregnation, it is necessary not to penetrate to the outside of the hard closed cell 3.
The shape of the groove 28 is not particularly limited, but a V shape is preferable.
Furthermore, although the hard closed-cell body 3 of FIG. 17 is bent in the direction in which the groove 28 is formed, it may be bent in the opposite direction. In this case, the groove 28 widens and is filled with excess resin 14 and becomes heavy, but it can be used as a resin flow path during VaRTM molding, and the flow media 11 between the mold and the FRP 4 can be removed. It becomes possible. In addition, after the molding, the resin 14 remaining in the groove 28 becomes a rib, and the effect of reinforcing the wind regulation cover 25 is obtained.

In addition, also about the cage | basket wall 24 comprised with the FRP molded object 1, in order to enable the bending shaping | molding of the hard closed cell body 3, on the surface of the hard closed cell body 3, it is perpendicular | vertical with respect to a bending direction. A plurality of grooves 28 are formed at intervals.

The car wall 25 and the wind regulation cover 25 of the elevator 22 of this embodiment use the FRP molded body 1 of the first embodiment, but of course the FRP molded bodies 1A, 1B, and 1C of the second to fourth embodiments are used. It may be used.
Of course, the elevator 22 to which the car wall 24 and the wind regulation cover 25 are applied is not limited to a high-speed elevator.

1, 1A, 1B, 1C Fiber reinforced plastic molded body, 2 open cell body, 2a divided part, 3, 3A hard closed cell body, 3a upper flat plate part (first flat part), 3b lower flat plate part (second 3c, 3Ac support part, 4 fiber reinforced plastic, 5, 5A, 5B opening, 10 peel ply, 11 flow media, 12 bagging film, 13 vacuum pump, 14 resin, 15 resin tank, 20 metal thin film, 21 Adhesive, H hole.
22 (high speed) elevator, 23 car floor, 24 car wall, 25 air conditioning cover, 26 electrical equipment (including blower, etc.), 27 design board, 28 groove.

Claims (14)

Open cells,
A hard closed cell covering this open cell,
With fiber reinforced plastic provided on at least both sides of this hard closed cell body,
The said open cell body is exposed outside through the opening formed in the said hard closed cell body and the said fiber reinforced plastic, The fiber reinforced plastic molding characterized by the above-mentioned. 2. The fiber-reinforced plastic molded article according to claim 1, wherein a metal layer is provided on the outer surface. 3. The fiber-reinforced plastic molded body according to claim 1 or 2, wherein the hard closed cell body has a support portion that is provided by connecting opposing faces and serves as a support for a pressing force in a compression direction. The fiber-reinforced plastic molded body according to claim 3, wherein the support portion is provided by dividing the open cell body into a triangular shape. The fiber-reinforced plastic molded body according to any one of claims 1 to 4, wherein the opening has a trapezoidal cross-sectional shape along a center line. The fiber-reinforced plastic molded body according to claim 5, wherein the opening extends to the open cell body. The fiber-reinforced plastic molded body according to any one of claims 1 to 6, wherein the fiber-reinforced plastic is a carbon fiber-reinforced plastic. The fiber according to any one of claims 1 to 7, wherein a plurality of grooves extending in a direction perpendicular to the bending direction are formed on the surface of the hard closed cell body at intervals. Reinforced plastic molding. An elevator comprising a car wall made of the fiber-reinforced plastic molded body according to any one of claims 1 to 8. The elevator according to claim 9, wherein a design plate that covers the opening is provided on the car wall. 9. A fiber reinforced plastic molded body according to any one of claims 1 to 8, wherein the wind proof cover is attached to the upper and lower parts of the car to rectify the air flow during the running of the car. Elevator. The elevator according to claim 11, wherein the wind regulation cover has a cap shape whose surface is an enormous curved surface in an outward direction. A method for producing a fiber-reinforced plastic molded body according to any one of claims 1, 2, 4 to 8,
A hard closed cell covering step of covering the entire surface of the open cell with the hard closed cell;
Covering the hard closed cells with reinforcing fibers;
A step of covering the reinforcing fiber with a bag film;
A decompression step of decompressing the interior of the bag film;
Injecting a liquid resin into the bag film, impregnating the reinforcing fiber with the resin and curing the resin impregnated in the reinforcing fiber to form the fiber-reinforced plastic;
And a step of forming the opening by forming the hard closed cell body and the fiber reinforced plastic. A method for producing a fiber-reinforced plastic molded article according to claim 3,
A hard closed cell covering step of covering the entire surface of the open cell with the hard closed cell;
Covering the hard closed cells with reinforcing fibers;
A step of covering the reinforcing fiber with a bag film;
A decompression step of decompressing the interior of the bag film;
Injecting a liquid resin into the bag film, impregnating the reinforcing fiber with the resin and curing the resin impregnated in the reinforcing fiber to form the fiber-reinforced plastic;
Drilling the hard closed cell body and the fiber reinforced plastic to form the opening, and
The hard closed cell covering step includes forming a hard closed cell block out of the hard closed cell formed of a hard closed cell block, a first flat plate portion, and a second flat plate portion, and a plurality of holes. And forming the support part;
In each of the holes, a step of inserting each divided portion divided into a plurality of parts from the open cell body, and
And a step of covering both surfaces of the open cell body with the first flat plate portion and the second flat plate portion.

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