WO2020144793A1

WO2020144793A1 - Carbon fiber-reinforced plastic reinforcement plate, reinforcement plate-attached member, platform fence, and method for producing carbon fiber-reinforced plastic reinforcement plate

Info

Publication number: WO2020144793A1
Application number: PCT/JP2019/000457
Authority: WO
Inventors: 広紀小林; 伊藤　洋平; 和規高垣; 壮平鮫島
Original assignee: 三菱電機株式会社
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2020-07-16
Also published as: CN113272118A; CN113272118B; JP6567231B1; JPWO2020144793A1

Abstract

This carbon fiber-reinforced plastic reinforcement plate has a reinforcement plate body. The reinforcement plate body is provided with a plurality of slits that split both carbon fibers and a resin. The plurality of slits includes a plurality of first slits and a plurality of second slits. Each first slit is formed within a range from a first end of the reinforcement plate body in the width direction to the central part thereof in the width direction. Each second slit is spaced apart from the first slits and formed within a range from a second end of the reinforcement plate body in the width direction to the central part thereof in the width direction.

Description

Carbon fiber reinforced plastic reinforcing plate, member with reinforcing plate, home fence, and method for manufacturing carbon fiber reinforced plastic reinforcing plate

The present invention relates to a carbon fiber reinforced plastic reinforcing plate, a member with the reinforcing plate having the reinforcing plate, a home fence using the member with the reinforcing plate, and a method for manufacturing the carbon fiber reinforced plastic reinforcing plate.

Carbon fiber reinforced plastic, or CFRP (Carbon Fiber Reinforced Plastics), is a lightweight and highly rigid material. Therefore, a CFRP reinforcing plate may be attached to the member to be reinforced in order to increase the rigidity of the member to be reinforced. Examples of the member to be reinforced include metal beams or metal columns.

However, the CFRP reinforcing plate, which is adjusted to have high rigidity, has a lower linear expansion coefficient in the fiber direction than the metal reinforced member. Therefore, there is a problem that the reinforcing plate is damaged by the thermal stress when the temperature is changed.

On the other hand, a method has been proposed in which a thermal stress is released by making a cut in a prepreg, which is an intermediate before molding of a thermoplastic resin molding, and cutting the reinforcing fiber. In addition, some patterns of the cut are given (for example, refer to Patent Document 1).

JP, 2017-144567, A

The conventional thermoplastic resin molded body disclosed in Patent Document 1 cannot be applied to a molding method that does not use a prepreg, for example, a pultrusion molding method that is excellent in mass productivity, because a cut is made in the prepreg state. There are challenges.

Further, when a slit as in Patent Document 1 is provided in a CFRP after molding by machining, the reinforcing plate is divided and the number of steps for attaching the member to the member to be reinforced increases, resulting in low productivity.

Further, if the start point and the end point of the slit are provided only inside the reinforcing plate so that the reinforcing plate is not divided, a processing device having a complicated mechanism such as a three-dimensional processing machine is required, resulting in low productivity. ..

The present invention has been made to solve the above problems, and a carbon fiber reinforced plastic reinforcing plate capable of suppressing damage due to thermal stress while suppressing a decrease in productivity, and a manufacturing method thereof. Aim to get.

The carbon fiber reinforced plastic reinforcing plate according to the present invention includes a plurality of carbon fibers and a resin, a reinforcing plate main body in which at least a part of the carbon fibers are arranged along the longitudinal direction, , A plurality of slits that divide both the carbon fiber and the resin are provided, and the plurality of slits are provided in the range from the first end in the width direction of the reinforcing plate body to the center in the width direction. A plurality of first slits, and a plurality of first slits provided in a range from the second end in the width direction of the reinforcing plate main body to the central portion in the width direction at intervals with respect to the first slit. 2 slits are included.
The method for manufacturing a carbon fiber reinforced plastic reinforcing plate according to the present invention includes a step of molding an intermediate body including a plurality of carbon fibers and a resin, in which at least a part of the carbon fibers are arranged along the longitudinal direction, A plurality of first slits are provided in the range from the first end in the width direction of the intermediate body to the central portion in the width direction, and the first slits in the width direction of the intermediate body are spaced apart from the first slits. And a step of providing a plurality of second slits in the range from the end of 2 to the center in the width direction.

According to the carbon fiber reinforced plastic reinforcing plate and the manufacturing method thereof of the present invention, damage due to thermal stress can be suppressed while suppressing a decrease in productivity.

FIG. 3 is a plan view showing a member with a reinforcing plate according to Embodiment 1 of the present invention. FIG. 2 is a sectional view taken along line II-II in FIG. 1. It is a top view which expands and shows the III section of the reinforcing plate main body of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 3 is a side view showing a part of the apparatus for manufacturing the CFRP reinforcing plate according to the first embodiment. It is a top view which shows the intermediate body cut|disconnected by the cutting machine of FIG. It is a top view which shows the state at the time of the process start for forming the 1st and 2nd slit in the intermediate body of FIG. It is a top view which shows the state which advanced the rotary grindstone of FIG. 7 to the intermediate part of the width direction of an intermediate body. FIG. 9 is a plan view showing a state in which the rotary grindstone of FIG. 8 is retracted to the outside of the intermediate body. It is a perspective view which shows the platform fence which is the 1st application example of the member with a reinforcing plate of Embodiment 1. It is sectional drawing which shows the cross section orthogonal to the longitudinal direction of the upper pipe of FIG. It is sectional drawing which follows the XII-XII line of FIG. It is a front view which shows the platform fence which is the 2nd application example of the member with a reinforcing plate of Embodiment 1.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1.
1 is a plan view showing a member with a reinforcing plate according to Embodiment 1 of the present invention. 2 is a sectional view taken along the line II-II in FIG. The member with a reinforcing plate according to the first embodiment includes a reinforcing plate 1 made of carbon fiber reinforced plastic, a member to be reinforced 2, and an adhesive 3.

The carbon fiber reinforced plastic reinforcing plate 1, that is, the CFRP reinforcing plate 1 has a strip-shaped reinforcing plate body 4. In this example, the CFRP reinforcing plate 1 is composed of only the reinforcing plate body 4. The reinforcing plate body 4 is attached to the member to be reinforced 2 with the adhesive 3.

1 and 2, the X-axis direction is the width direction of the reinforcing plate body 4 and the reinforced member 2. The Y-axis direction is the longitudinal direction of the reinforcing plate body 4 and the reinforced member 2. The Z-axis direction is the thickness direction of the reinforcing plate body 4 and the reinforced member 2. The thickness of the reinforcing plate body 4 is the same for the entire reinforcing plate body 4. Further, the width of the reinforcing plate body 4 is also the same for the entire reinforcing plate body 4.

The reinforcing plate body 4 is provided with a plurality of

linear slits

4a and 4b. The plurality of

slits

4a and 4b include a plurality of first slits 4a and a plurality of second slits 4b.

Each of the first slits 4a is continuously provided in the range from the widthwise first end 4c of the reinforcing plate body 4 to the widthwise central portion. Each second slit 4b is continuously provided in a range from the second end portion 4d in the width direction of the reinforcing plate body 4 to the center portion in the width direction.

In this example, the first and

second slits

4a and 4b are provided up to the center of the reinforcing plate body 4 in the width direction. Therefore, both the first and

second slits

4a and 4b are present in the cross section parallel to the YZ plane at the center of the reinforcing plate body 4 in the width direction.

Also, each second slit 4b is arranged at a distance from the first slit 4a. In addition, the plurality of first slits 4a and the plurality of second slits 4b are arranged alternately and at equal pitches from the first end to the second end in the longitudinal direction of the reinforcing plate body 4. Has been done.

The cross-sectional shape of the reinforced member 2 orthogonal to the longitudinal direction is rectangular. The reinforced member 2 is a hollow square pipe. The reinforced member 2 is made of aluminum alloy. The reinforcing plate body 4 is attached to the adhered surface 2a, which is one of the four outer surfaces of the reinforced member 2, so as to cover the entire adhered surface 2a.

FIG. 3 is an enlarged plan view showing a portion III of the reinforcing plate body 4 of FIG. 4 is a sectional view taken along the line IV-IV in FIG. The reinforcing plate body 4 contains a plurality of carbon fibers 5 and a resin 6 as a matrix resin. At least some of the carbon fibers 5 are arranged along the longitudinal direction of the reinforcing plate body 4. The plurality of

slits

4a and 4b divide both the carbon fiber 5 and the resin 6.

The plurality of first slits 4a are inclined in the same direction with respect to the longitudinal direction of the reinforcing plate body 4 by the same angle. In FIG. 3, each first slit 4a is inclined from the longitudinal direction of the reinforcing plate body 4 by an angle θ with the counterclockwise direction as the positive direction.

The plurality of second slits 4b are inclined to the side opposite to the first slit 4a by the same angle as the first slit 4a with respect to the longitudinal direction of the reinforcing plate body 4. In FIG. 3, each second slit 4b is inclined from the longitudinal direction of the reinforcing plate body 4 by an angle −θ with the counterclockwise direction being the positive direction.

The angle θ is larger than 0 degrees and smaller than 90 degrees. Further, the angle θ satisfies the following equation. In addition, w is the width of the reinforcing plate body 4, t is the width of each of the first and

second slits

4a and 4b, and l is the pitch of the first and

second slits

4a and 4b in the longitudinal direction of the reinforcing plate body 4. is there.

(W−t×cos θ)/l≦tan θ≦(w+t×cos θ)/l...(1)

In this case, as shown in FIG. 4, a cross section orthogonal to the longitudinal direction includes one of the first and

second slits

4a and 4b at any position in the longitudinal direction.

When the slit width t is made small enough, the relation of the following formula is obtained, which is the best.

Tan θ=w/l (2)

In such a CFRP reinforcing plate 1, all the first and

second slits

4a and 4b are stopped at the central portion of the reinforcing plate body 4 in the width direction. That is, the reinforcing plate body 4 is connected without being divided into a plurality of parts. Therefore, the step of attaching to the member to be reinforced 2 may be performed once, and is excellent in productivity as compared with the case of being divided into plural pieces.

Further, since the first and

second slits

4a and 4b divide the carbon fiber 5, it is possible to reduce the thermal stress due to the difference in thermal expansion coefficient between the CFRP reinforcing plate 1 and the reinforced member 2.

In addition, since the first and

second slits

4a and 4b also divide the resin 6, the first and

second slits

4a and 4b can be provided after the reinforcing plate body 4 is molded, and the productivity is excellent. There is.

On the other hand, even if the reinforcing member 2 is provided with slits and the CFRP reinforcing plate 1 is not provided with slits, thermal stress can be similarly reduced. However, in this case, the thermal expansion of the member with the reinforcing plate becomes closer to that of the CFRP reinforcing plate 1. Therefore, when the reinforced member 2 is attached to another metal member, thermal stress is generated.

On the other hand, when the first and

second slits

4a and 4b are provided in the reinforcing plate body 4, the thermal expansion of the member with the reinforcing plate becomes close to that of the metal member 2 to be reinforced. Therefore, even if the reinforced member 2 is attached to another metal member, thermal stress is reduced.

Further, in the CFRP reinforcing plate 1 of the first embodiment, it is possible to use the reinforcing plate main body 4 formed by a molding method that does not use a prepreg, for example, a pultrusion molding method that is excellent in mass productivity.

Further, the first and

second slits

4a and 4b are formed from the ends of the reinforcing plate body 4 in the width direction. Therefore, it is possible to provide the first and

second slits

4a and 4b by a two-dimensional processing method without using a three-dimensional processing machine, which is excellent in productivity.

As described above, according to the CFRP reinforcing plate 1 and the member with a reinforcing plate of the first embodiment, damage due to thermal stress can be suppressed while suppressing a decrease in productivity.

Also, generally, if a slit is provided in the reinforcing plate, the reinforcing effect cannot be obtained at the slit portion, and the rigidity in the direction of tearing the slit becomes low. Therefore, when the slit is inclined at a constant angle with respect to the longitudinal direction, the member with the reinforcing plate is twisted and deformed when an external force is applied.

On the other hand, in the first embodiment, all the first slits 4a are inclined in the same direction, and all the second slits 4b are inclined in the opposite side to the first slit 4a. Therefore, the twisting deformation is canceled out, and the symmetry of the member with the reinforcing plate can be maintained.

The inclination angle of each first slit 4a is θ, and the inclination angle of each second slit 4b is −θ. Therefore, the torsional deformation of the member with the reinforcing plate can be more reliably canceled.

Further, since θ satisfies the above formula (1), the member 2 to be reinforced can be uniformly reinforced in the entire longitudinal direction of the CFRP reinforcing plate 1, and the occurrence of local deformation can be suppressed. can do.

On the other hand, if tan θ is smaller than (wt×cos θ)/l, the first slit 4a and the second slit 4b are included in the same cross section. Therefore, the rigidity of the member with the reinforcing plate is impaired.

Also, if tan θ is larger than (w+t×cos θ)/l, there will be a cross section that does not include both the first and

second slits

4a and 4b. For this reason, the deformation is not uniform, and a portion which becomes the starting point of the destruction occurs.

Also, by satisfying the equation (2) in which the slit width t is taken into consideration, high machining accuracy is not required and productivity is further improved.

Also, all the first and

second slits

4a and 4b are linearly formed from the end of the reinforcing plate body 4 in the width direction. Therefore, the first and

second slits

4a and 4b can be easily formed by machining. Further, it is not necessary to limit the size of the tool to the length of the first and

second slits

4a and 4b or less, which is excellent in productivity.

Also, when forming the first and

second slits

4a and 4b, it is not necessary to move the tool in the multi-axis direction at the start point and the end point, which is excellent in productivity.

Also, the thickness of the reinforcing plate body 4 is the same for the entire reinforcing plate body 4. Therefore, the reinforcing plate body 4 can be molded by a molding method that cannot change the cross section.

Also, the width of the reinforcing plate body 4 is the same in the entire reinforcing plate body 4, and the shape of the cross section orthogonal to the longitudinal direction of the reinforcing plate body 4 is the same in the entire reinforcing plate body 4. Therefore, the pultrusion method can be applied and the productivity is excellent.

Also, since the outer shape of the reinforcing plate main body 4 is a strip shape, the rigidity of the member to be reinforced 2 such as beams, ribs and columns can be improved over a longer distance.

Note that each carbon fiber 5 may be selected according to the required mechanical characteristics, but here pitch-based carbon fibers are used.

Also, the longitudinal elastic modulus of each carbon fiber 5 is 600 GPa. With pitch-based carbon fibers having a longitudinal elastic modulus of more than 900 GPa, fiber breakage may occur during the pultrusion process, resulting in low productivity.

Also, if the longitudinal elastic modulus is less than 400 GPa, the elastic modulus of the unidirectional CFRP plate begins to fall below that of iron. Therefore, the productivity is lower than that in the case where the thickness of the member to be reinforced is increased, and the advantage of using the CFRP reinforcing plate is lost.

Further, if the longitudinal elastic modulus is less than 200 GPa, the specific rigidity of the unidirectional CFRP plate starts to fall below the specific rigidity of iron, which is further unfavorable.

Therefore, the longitudinal elastic modulus of each carbon fiber 5 is preferably 400 GPa or more and 900 GPa or less. As a result, when one-way CFRP is used, higher rigidity than that of iron can be obtained.

Further, as the resin 6, epoxy, vinyl ester, unsaturated polyester, furan, polyurethane, polyimide, polyamide, polyether ether ketone, polyether sulfone, acrylonitrile, polypropylene, polyester, nylon, polycarbonate, acrylonitrile tadiene styrene, acrylonitrile styrene , Modified polyphenylene ether, polyethylene, polyacetal and the like.

By using any of these resins as the resin 6, the carbon fiber 5 and the resin 6 can be brought into good contact with each other.

Also, as the resin 6, a thermosetting resin having excellent mechanical properties is suitable. In particular, when an epoxy resin having a glass transition temperature Tg of 130° C. is used, sufficient rigidity can be ensured and creep deformation can be suppressed to be small. Further, vinyl ester and unsaturated polyester are also preferable for the same reason. Further, the resin 6 may contain a filler to adjust at least one of elastic modulus, thermal expansion coefficient, and flame retardancy.

Also, it is preferable that the reinforcing plate body 4 is made of a unidirectional member. Since all the carbon fibers 5 are arranged along the longitudinal direction of the reinforcing plate body 4, the unidirectional material has excellent mechanical properties and can realize high rigidity.

Also, unidirectional materials have excellent productivity because they can be manufactured by a pultrusion method. The direction of each carbon fiber 5 in the unidirectional material may include a processing error of about ±5 degrees.

Further, the reinforcing plate body 4 may be made of, for example, an orthogonal laminated material, an oblique laminated material, or a pseudo isotropic laminated material other than the unidirectional material. Examples of the molding method in this case include an autoclave method, an RTM (Resin Transfer Molding) method, a VaRTM (Vacuum assisted Resin Transfer Molding) method, and a press molding method.

Adhesive 3 is best acrylic adhesive, then epoxy adhesive. When an acrylic adhesive or an epoxy adhesive is used, a sufficient shearing force can be transmitted between the reinforced member 2 and the reinforcing plate body 4.

Cyanate resin is not suitable as the adhesive 3 because it easily peels off due to temperature change. The silicone resin and the modified silicone resin have poor load transmission and are not suitable as the adhesive 3.

Further, it is preferable that the adhesive 3 is attached to the entire surface of the reinforcing plate body 4 to be adhered to the member to be reinforced 2, so that the load transmission between the reinforcing plate body 4 and the member to be reinforced 2 is good. You can

When using an acrylic adhesive as the adhesive 3, if the pitch 1 is 200 mm, load transfer is good and peeling does not occur even with temperature changes, which is the best.

If the pitch l is less than 100 mm, the reinforcing effect will be impaired. Further, when the pitch 1 is set to be larger than 250 mm, peeling easily occurs due to temperature change. Note that here, a temperature change from −30° C. to +60° C. is assumed.

Therefore, the pitch l is preferably 100 mm or more and 250 mm or less. Accordingly, it is possible to suppress the occurrence of peeling due to the difference in thermal expansion with respect to the temperature change in the outdoor atmospheric environment.

The slit width t may be set in consideration of the desired rigidity and productivity, but it is preferably 0.6 mm or more and 2.0 mm or less, and is 1.0 mm here.

The width w of the reinforcing plate body 4 may be set according to the purpose, but is 30 mm here.

Next, a method of manufacturing the CFRP reinforcing plate 1 will be described. FIG. 5 is a side view showing a part of an apparatus for manufacturing the CFRP reinforcing plate 1 according to the first embodiment.

The device shown in FIG. 5 has a resin bath 21, a molding die 22, a take-up device 23, and a cutting machine 24. The uncured resin 6 is stored in the resin bath 21. The mold 22 has a cavity and a heating mechanism. The cross-sectional shape of the cavity is the same as the cross-sectional shape orthogonal to the longitudinal direction of the intended reinforcing plate body 4.

The take-up device 23 grasps the intermediate body 13 of the reinforcing plate body 4 and takes it from the forming die 22. The cutting machine 24 cuts the intermediate body 13 into a desired length.

The plurality of bobbins 11 are arranged in a rack (not shown). A carbon fiber bundle 12 is wound around each bobbin 11. Each carbon fiber bundle 12 is composed of a plurality of carbon fibers 5 so as to satisfy a target cross-sectional shape and a carbon fiber content rate.

The carbon fiber bundle 12 pulled out from the bobbin 11 is sent to the resin bath 21. In the resin bath 21, the carbon fiber bundle 12 is impregnated with the uncured resin 6. Then, the carbon fiber bundle 12 is drawn into the cavity of the molding die 22. In the molding die 22, the uncured resin 6 is heated and cured by the heating mechanism. Thereby, the intermediate body 13 is molded.

The intermediate body 13 is collected by the collecting device 23. The intermediate body 13 can be molded while the intermediate body 13 is continuously drawn at a constant speed by the take-up device 23. Moreover, the intermediate body 13 may be formed intermittently by repeatedly taking up and stopping the take-up device 23. In either case, it is necessary to secure a time for the resin 6 to be properly cured in the molding die 22.

The process up to this point is called the molding process here. The cross-sectional shape of the intermediate body 13 may be a shape according to the purpose, but is a rectangular cross section here. In addition, the molded intermediate body 13 has a strip shape, and all the carbon fibers 5 are aligned along the longitudinal direction of the intermediate body 13.

After that, the intermediate body 13 is sent to the cutting machine 24 and cut into a desired length. FIG. 6 is a plan view showing the intermediate body 13 cut by the cutting machine 24 of FIG.

FIG. 7 is a plan view showing a state at the start of processing for forming the first and

second slits

4a and 4b in the intermediate body 13 of FIG. The first and

second slits

4a and 4b are formed by moving the disk-shaped rotary grindstone 25 relative to the intermediate body 13.

　The rotating grindstone 25 rotating at a constant speed is linearly advanced from the widthwise end of the intermediate body 13 at the angle described above. Then, as shown in FIG. 8, when the tip of the rotary grindstone 25 advances to the intermediate portion in the width direction of the intermediate body 13, the rotary grindstone 25 is retracted as it is, as shown in FIG. As a result, both the plurality of carbon fibers 5 and the resin 6 are ground at the same time, and the second slit 4b is formed in FIG.

All the second slits 4b can be formed by repeating such a process while feeding the intermediate body 13 in the longitudinal direction or changing the position of the rotary grindstone 25 in the longitudinal direction of the intermediate body 13. it can.

In addition, by performing the same process by turning over the intermediate body 13 or by moving the rotary grindstone 25 to the opposite side in the width direction of the intermediate body 13, as shown in FIG. The slit 4a can be formed.

In addition, by disposing a pair of rotary grindstones 25 on both sides of the intermediate body 13 in the width direction, a step of forming a plurality of first slits 4a and a step of forming a plurality of second slits 4b are performed. It can also be carried out simultaneously.

The whetstone width of the rotary whetstone 25 may be selected according to the target slit width, but the smaller the whetstone width, the better the reinforcing effect. However, if the width of the grindstone is too small, the durability of the rotary grindstone 25 becomes problematic.

Therefore, the width of the grindstone is preferably 0.5 mm or more and 1.8 mm or less. When the target slit width is 1.0 mm, the grindstone width is best 0.9 mm.

Here, the molding process, the cutting process, and the slit forming process are described in this order, but the molding process, the slit forming process, and the cutting process may be performed in this order.

As described above, the method for manufacturing the CFRP reinforcing plate 1 according to the first embodiment includes the forming step of forming the intermediate body 13, the slit forming step of forming the first and

second slits

4a and 4b, and the intermediate body 13. And a cutting step of cutting into a desired length.

According to such a manufacturing method, since the first and

second slits

4a and 4b are formed in the intermediate body 13 made of CFRP after molding, the CFRP-made product is highly productive even in the pultrusion without using the prepreg. The reinforcing plate 1 can be manufactured.

Further, since the carbon fiber bundle 12 impregnated with the uncured resin 6 is drawn into the molding die 22 and the uncured resin 6 is heat-cured, a large number of CFRP reinforcing plates 1 can be continuously produced.

Further, the first and

second slits

4a and 4b are formed by moving the rotary grindstone 25 relative to the intermediate body 13. Therefore, a multi-axis machining machine such as a machining center is not required, and the productivity is high.

Next, FIG. 10 is a perspective view showing a platform fence which is a first application example of the member with the reinforcing plate of the first embodiment. The platform fence of the first application example has a frame 31 and a platform door 32. The frame 31 is installed upright on the platform. A door pocket is formed in the frame 31.

The platform door 32 can move horizontally with respect to the frame 31. By housing the platform door 32 in the door pocket, the opening of the platform fence is opened, and it is possible to get on and off the train stopped at the station. Further, by closing the opening with the platform door 32, it is possible to prevent the person on the platform from falling into the track and the person on the platform from coming into contact with the train.

The platform door 32 is cantilevered by the frame 31. The home door 32 has an upper pipe 33, a lower pipe 34, and a flat door panel 35. The upper pipe 33 and the lower pipe 34 are structural members of the platform door 32.

The lower pipe 34 is arranged directly below the upper pipe 33. The upper pipe 33 and the lower pipe 34 are arranged parallel to each other and horizontally. The door panel 35 is fixed between the upper pipe 33 and the lower pipe 34.

11 is a cross-sectional view showing a cross section orthogonal to the longitudinal direction of the upper pipe 33 of FIG. FIG. 12 is a sectional view taken along line XII-XII in FIG. Square pipes made of aluminum alloy are used as the upper pipe 33 and the lower pipe 34, respectively.

The CFRP reinforcing plate 1 shown in FIG. 1 is attached to the inner surface of the upper pipe 33. That is, in the first application example, the upper pipe 33 is the member to be reinforced. The member with the reinforcing plate in the first application example is configured by combining the upper pipe 33 and the CFRP reinforcing plate 1.

A guide rail 36 that guides the opening/closing operation of the platform door 32 is fixed to the lower surface of the upper pipe 33.

In such a home fence, since the CFRP reinforcing plate 1 is fixed to the upper pipe 33, it is possible to improve the strength of the home door 32 while reducing the weight of the home door 32.

Also, it is possible to realize the home door 32 that opens and closes a wide opening while suppressing the deformation of the upper pipe 33 due to its own weight.

Further, since the CFRP reinforcing plate 1 is attached to the inner surface of the upper pipe 33, a metal member such as the guide rail 36 can be directly attached to the outer surface of the upper pipe 33.

Next, FIG. 13 is a front view showing a platform fence which is a second application example of the member with the reinforcing plate of the first embodiment. The platform fence of the second application example has a frame 41 and a platform door 42.

The frame 41 has a first vertical pipe 43, a second vertical pipe 44, a first horizontal pipe 46, and a second horizontal pipe 47. The first and second

vertical pipes

43, 44 are installed upright on the platform with a space therebetween.

The first horizontal pipe 46 is horizontally fixed between the upper end of the first vertical pipe 43 and the upper end of the second vertical pipe 44. The second horizontal pipe 47 is horizontally fixed between the intermediate portion of the first vertical pipe 43 and the intermediate portion of the second vertical pipe 44.

The outer shape of the platform door 42 is U-shaped. The first end of the home door 42 is inserted into the first horizontal pipe 46. The second end of the home door 42 is inserted into the second horizontal pipe 47. The home door 42 is movable in the horizontal direction with respect to the frame 41.

Square aluminum pipes are used as the first vertical pipe 43, the second vertical pipe 44, the first horizontal pipe 46, and the second horizontal pipe 47, respectively. Although illustration is omitted, the CFRP reinforcing plate 1 similar to that in FIG. 1 is provided on the inner surfaces of the first vertical pipe 43, the second vertical pipe 44, the first horizontal pipe 46, and the second horizontal pipe 47, respectively. Is pasted.

That is, in the second application example, each of the first vertical pipe 43, the second vertical pipe 44, the first horizontal pipe 46, and the second horizontal pipe 47 is a member to be reinforced.

With such a home fence, the weight and strength of the frame 41 can be reduced.

Note that at least one of the frame 31 and the lower pipe 34 in FIG. 10 may be the member to be reinforced. Further, the home door 42 of FIG. 13 may be used as the member to be reinforced. Further, not all of the first vertical pipe 43, the second vertical pipe 44, the first horizontal pipe 46, and the second horizontal pipe 47, but only some of them may be the members to be reinforced. That is, in the platform fence, by applying the member with the reinforcing plate to at least a part of the frame and the platform door, it is possible to reduce the weight and the strength of the platform fence.

Also, the thickness and width of the reinforcing plate body may be appropriately changed according to the design in order to use the material efficiently.

Also, the outer shape of the reinforcing plate body can be appropriately changed according to the shape of the member to be reinforced.

Also, the reinforcing plate body may contain fibers other than carbon fibers, for example, glass fibers.

Also, it is not necessary that all the first slits have the same inclination angle. Similarly, the inclination angles of all the second slits do not necessarily have to be the same.

Moreover, two or more first slits and second slits may be alternately arranged from the first end to the second end in the longitudinal direction of the reinforcing plate body. Further, the first slits and the second slits do not necessarily have to be alternately arranged by the same number.

Also, the member to be reinforced may be a member having no hollow portion instead of a pipe.

The member to be reinforced may be a member other than a beam and a pillar, for example, a rib.

Also, the material of the reinforced member is not limited to the aluminum alloy.

Further, in the first embodiment, the first and second slits are formed by the grinding process using the rotary grindstone, but the processing method is not limited to this. For example, the first and second slits can be formed with high productivity by cutting or water jet processing.

Also, the member to be reinforced is not limited to the member of the home fence, and the carbon fiber reinforced plastic reinforcing plate of the present invention can be applied to all purposes.

1 carbon fiber reinforced plastic reinforcing plate, 2 reinforced member, 3 adhesive, 4 reinforcing plate body, 4a first slit, 4b second slit, 5 carbon fiber, 6 resin, 13 intermediate, 25 rotating whetstone, 31, 41 frame, 32, 42 platform door.

Claims

A reinforcing plate body including a plurality of carbon fibers and a resin, wherein at least a part of the carbon fibers is arranged along the longitudinal direction,
The reinforcing plate body is provided with a plurality of slits that divide both the carbon fiber and the resin,
The plurality of slits,
A plurality of first slits provided in a range from the first end in the width direction of the reinforcing plate body to the central portion in the width direction;
A plurality of second slits provided at intervals from the first slit in the widthwise second end of the reinforcing plate body to the widthwise central portion. Reinforcing plate made of carbon fiber reinforced plastic.
The carbon fiber reinforced according to claim 1, wherein the first slits and the second slits are alternately arranged from a first end portion in a longitudinal direction of the reinforcing plate body toward a second end portion. Reinforcement plate made of plastic.
The plurality of first slits are inclined in the same direction with respect to the longitudinal direction of the reinforcing plate body,
The carbon fiber reinforced plastic reinforcement according to claim 1 or 2, wherein the plurality of second slits are inclined to a side opposite to the first slits with respect to a longitudinal direction of the reinforcing plate body. Board.
The plurality of second slits are inclined to the side opposite to the plurality of first slits by the same angle as the plurality of first slits with respect to the longitudinal direction of the reinforcing plate body,
The carbon fiber reinforced plastic reinforcing plate according to claim 3, wherein the plurality of first slits and the plurality of second slits are arranged at equal pitches in a longitudinal direction of the reinforcing plate body.
The width of the reinforcing plate body is w, the inclination angle of each of the first slits with respect to the longitudinal direction of the reinforcing plate body is θ, the width of each of the first and second slits is t, and the longitudinal direction of the reinforcing plate body is When the pitch of the first and second slits of is
(W−t×cos θ)/l≦tan θ≦(w+t×cos θ)/l
The carbon fiber reinforced plastic reinforcing plate according to claim 4, wherein
The carbon fiber reinforced plastic reinforcing plate according to any one of claims 1 to 5, wherein a pitch of the first and second slits in the longitudinal direction of the reinforcing plate main body is 100 mm or more and 250 mm or less. ..
A carbon fiber reinforced plastic reinforcing plate according to any one of claims 1 to 6,
A member with a reinforcing plate, comprising: a member to be reinforced; and an adhesive that bonds the carbon fiber reinforced plastic reinforcing plate to the member to be reinforced.
The adhesive is an acrylic adhesive or an epoxy adhesive,
The carbon fiber is a pitch-based carbon fiber,
The member with a reinforcing plate according to claim 7, wherein a longitudinal elastic modulus of the carbon fiber is 400 GPa or more and 900 GPa or less.
A frame, and a platform door movable with respect to the frame,
A home fence in which the member with a reinforcing plate according to claim 7 is used in at least a part of the frame and the platform door.
A step of molding an intermediate body containing a plurality of carbon fibers and a resin, wherein at least a part of the carbon fibers is arranged along the longitudinal direction;
A plurality of first slits are provided in a range from a first end in the width direction of the intermediate body to a central portion in the width direction, and the width of the intermediate body is spaced from the first slits. And a step of providing a plurality of second slits in the range from the second end in the direction to the center in the width direction.
11. The method for manufacturing a carbon fiber reinforced plastic reinforcing plate according to claim 10, wherein the first and second slits are provided in the intermediate body by moving a rotary grindstone relative to the intermediate body.