JP2008044347A - Joint structure of frp shaped article and joint bonding process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an FRP shaped article which can avoid the increase of stream resistance and the deterioration of a fine sight, even if the article is used for a hull. <P>SOLUTION: When joining an FRP shaped article 1 which is connected between neighboring FRP shaped articles through a metal sheet 4, in which the FRP shaped article 1 is formed by laminating fiber-reinforced materials 3a and 3b on the both outsides of a core 2 being as the inside, one end side 4a of the metal sheet 4 used as the 1st core material of the joint part is buried so that a board thickness longitudinal plane of symmetry may be coincide with the board thickness longitudinal plane of symmetry of the laminated material and they are unified by performing plastic impregnation, when the neighboring FRP shaped article 1 is connected and adhered between neighboring FRP shaped articles through a metal plate 4, exposed parts 4b and 4b of each of metal plates 4 and 4 are butt-welded, and embedded sections of these metal sheets 4 and 4 are fixed susediarily to bodies of both sides of the FRP shaped articles 1 and 1 with bolts 6 and nut 7, respectively, and furthermore, the 2nd core 9 is added to the whole range of the joint part including these auxiliary stationary portion and a butt-weld section 8, so that the joint part may be in the same plane with the surface of the main part of both the FRP shaped articles 1 and 1 and sandwiched between fiber reinforcing materials 11a and 11b and unified by resin impregnation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joint structure and a joining method when joining FRP molded products, and more particularly, a joint of an FRP molded product that makes it possible to configure a hull of a relatively large boat by using an FRP molded product. The present invention relates to a structure and a joint joining method.

  By embedding or sandwiching one end side of the metal plate in the edge part that becomes the joint of the FRP molded product and fixing it to the main body side of the FRP molded product with bolts and nuts, the joint part of the FRP molded product is made of metal, As a result, the present applicant has already proposed that the FRP molded products or the FRP molded product and the metal structure can be joined by welding (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-205758 (FIGS. 2 and 6)

  In such a case, for example, the FRP molded product can be used for each structural part in a plant apparatus or a boat, and the application can be expanded. However, in the past, the FRP molding joint part and the fixing part (particularly bolts and nuts) to the FRP molding main body of the metal plate to be a joint are exposed and uneven, and the surface and surface of the FRP molding main part are exposed. Therefore, when an FRP molded product having such a joint portion is used for the hull, not only the water flow resistance is increased by the unevenness, but also the appearance is unavoidable.

  The technical problem of the present invention is to make it possible to avoid an increase in water flow resistance and a deterioration in aesthetics even when an FRP molded product is used for a hull.

  In the joint structure of the FRP molded product according to the present invention, the fiber reinforcement is laminated on both outer sides of the core material, and the first core material of the joint portion is formed at the end edge portion that becomes the joint portion of the laminate. The FRP molded product in which one end side of the metal plate to be embedded is embedded so that the plate thickness center plane coincides with the plate thickness center plane of the laminate and impregnated with resin is integrated via the metal plate It is a joint structure formed by connecting and joining between adjacent FRP molded products, and the joint structure is formed by butt-welding the tips of the exposed portions of the metal plates between adjacent FRP molded products. The embedded part is fixed to the main body side of both FRP moldings by bolts and nuts, respectively, and the entire joint part including the auxiliary fixing part and the butt welded part is the main body of both FRP moldings. Second to be flush with the surface of the part Sandwiched by fiber reinforcement from the outside is added to the core material, in which are integral with the resin impregnated.

  Moreover, the joint joining method of this FRP molded product laminates the fiber reinforcing material and the core material with the core material in the middle, and becomes the first core material of the joint portion at the end edge portion that becomes the joint portion of the laminate. Embedding one end side of the metal plate so that the plate thickness center plane coincides with the plate thickness center plane of the laminate, impregnating with resin, and obtaining an FRP molded product in which these are integrated, and FRP to be connected A step of facing exposed ends of the metal plates between the molded products, and butt welding; a step of auxiliaryly fixing the embedded portions of these metal plates to the main body side of both FRP molded products by bolts and nuts; A step of adding a second core material so that the entire joint portion including the auxiliary fixing portion of the metal plate and the butt weld portion is flush with the surfaces of the main body portions of both FRP molded products, and the addition to the joint portion Sandwich the second core material with fiber reinforcement from the outside, It is characterized by having a step of integrating is impregnated.

  In the joint structure of the FRP molded product according to the present invention, the fiber reinforcing material is laminated on both outer sides of the core material inside, and the first core material of the joint portion is formed on the end edge portion which becomes the joint portion of the laminate. An FRP molded product in which one end side of the resulting metal plate is embedded so that the thickness center plane of the metal plate coincides with the thickness center plane of the laminate and impregnated with resin is integrated via the metal plate. A joint structure formed by connecting and joining between FRP moldings, wherein the joint structure has a tip of an exposed portion of the metal plate interposed between adjacent FRP moldings via a metal plate for correcting misalignment. Are opposed to each other and butt welded to both ends of the metal plate for correcting misalignment, and the embedded portions of both metal plates are supplementarily fixed to the main body side of both FRP molded products by bolts and nuts, respectively. Furthermore, these auxiliary fixing parts and both butt melts The second core material is added so that the entire area of the joint including the metal plate for correcting the misalignment and the misalignment correction is flush with the surface of the main body of both FRP molded products, and sandwiched between the fiber reinforcements from the outside, resin It is impregnated and integrated.

  Further, the joint joining method of this FRP molded product is a method of laminating a fiber reinforcing material and a core material with the core material in the middle, and a first core material of the joint portion on the edge that becomes the joint portion of the laminate. A step of embedding one end side of the metal plate so that the thickness center plane thereof coincides with the thickness center plane of the laminate and impregnating with a resin to obtain an FRP molded product in which these are integrated, and to be connected The step of disposing the tips of the exposed portions of the metal plates of the FRP moldings opposite to each other via a misalignment correcting metal plate, and the metal of the FRP moldings to be connected to both ends of the misalignment correcting metal plate A step of butt welding the tips of the exposed portions of the plates, a step of auxiliaryly fixing the embedded portions of the metal plates to the main body side of both FRP molded products by bolts and nuts, and the auxiliary of the metal plates Fixing and butt welds and correction of misunderstandings The step of adding the second core material so that the entire joint portion including the metal plate is flush with the surfaces of the main body portions of both FRP molded products, and the second core material added to the joint portion with a fiber reinforcing material from the outside And sandwiching and impregnating with resin to integrate.

  Further, in the joint structure of the FRP molded product according to the present invention, the joint side end edge portion of the main body portion of the FRP molded product is formed in a tapered portion whose tip is reduced toward the metal plate, Metal backing plates are attached to and bonded to both surfaces of the joint portion so as to cover from the auxiliary fixing portion to immediately before the taper portion, and these backing plates together with the embedded portion of the metal plate, respectively. The bolt and nut are auxiliaryly fixed to the main body side of the FRP molded product.

  Further, in the joint structure of the FRP molded product according to the present invention, the joint side end edge portion of the main body portion of the FRP molded product is formed in a tapered portion whose tip is reduced toward the metal plate, A metal backing plate is attached to and bonded to both surfaces of the joint portion so as to cover the auxiliary fixing portion to the tapered portion, and each of the backing plates together with the embedded portion of the metal plate is the bolt. -It is fixed to the main body side of the FRP molded product by a nut.

  Further, in the joint structure of the FRP molded product according to the present invention, the embedded portion on one end side of the metal plate is disposed so that the end thereof is on the tip end portion of the tapered portion, and at least serves as the skin of the laminate. A wedge-shaped space formed between the inner surface of the tapered portion and both surfaces of the end portion of the embedded portion of the metal plate in the fiber reinforcing material is filled with a first core material end portion reinforcing material.

  Moreover, in the joint structure of the FRP molded product according to the present invention, the first core material end portion reinforcing member is formed in a U-shaped cross-section that can be fitted into the end portion of the embedded portion of the metal plate. The wedge-shaped space is filled with both ends of the shape.

  Further, in the joint structure of the FRP molded product according to the present invention, the first core material end reinforcing member has a U-shaped fitting portion having a U-shaped cross-section that can fit the end portion of the embedded portion of the metal plate at the tip. The wedge-shaped space is filled with both ends of the U-shaped cross section, and the rear extends from the shoulders of the U-shaped cross section of the fitting portion to the rear along the tapered portion. One part is provided.

  Further, in the joint structure of an FRP molded product according to the present invention, a rear space of the first core material end reinforcing material in the taper portion is higher in rigidity and strength than the core material of the laminate or the core material. The first core material end reinforcing material is bonded to the front end of the core material of the laminate or the second core material end reinforcing material.

  In the joint structure of the FRP molded product according to the present invention, the embedded portions of the two metal plates, which are the first cores of the joint portion, are supplementarily fixed to the main body side of both FRP molded products by bolts and nuts, respectively. A second core is added so that the entire joint part including these auxiliary fixing part and butt weld part is flush with the surface of the main body part of both FRP molded products, and is sandwiched between fiber reinforcements from the outside. Since it is impregnated and integrated, the joint strength of the joint portion is improved, and the protrusion (exposure) of the bolt head or nut to the surface of the joint portion can be prevented. For this reason, it is also possible to apply the FRP molded product according to the present invention to the hull of a relatively large boat, and in that case, it is possible to prevent an increase in water flow resistance and a deterioration in aesthetics.

  In addition, the connecting joint is composed of a metal plate that can be plastically deformed three-dimensionally, and the exposed portion tip of the metal plate is butt welded between adjacent FRP molded products, so that the joint location can be mistaken. Can be modified. At that time, a misalignment correcting metal plate is interposed between the tips of the exposed portions of both metal plates, and the tips of the exposed portions of these metal plates are butt welded to both ends of the miscorrecting metal plate, respectively. As a result, it becomes easy to correct the three-dimensional misunderstanding of the joint portion.

  Further, the joint side edge of the main body of the FRP molded product is formed in a tapered portion whose tip is reduced toward the metal plate, and is made of metal so as to cover from the auxiliary fixing portion to the tapered portion. Since the abutting plates are attached to both surfaces of the joint portion and bonded, and these abutting plates are fixed to the main body side of the FRP molded product by bolts and nuts together with the embedded portions of the metal plates, When an in-plane load such as tension or compression is applied to the FRP molded product, the stress generated in the FRP molded product can be shared by the contact plate. For this reason, when the stress in the FRP molded product is reduced and, for example, a compressive load is applied, deformation in the plate thickness direction of the FRP molded product can be suppressed, particularly at the start of the core material taper of the joint. The strength against peeling at the boundary surface between the easy core material and the fiber reinforcement as the skin material can be improved. Such load bearing performance can be further enhanced by adhering the backing plate to both surfaces of the joint as described above.

  Further, the embedded portion on one end side of the metal plate is disposed so that the end thereof is on the tip portion of the tapered portion, and at least the inner surface of the tapered portion and the embedded metal plate in the fiber reinforcing material serving as the skin of the laminate Since the wedge-shaped spaces formed between both ends of the end portion of the portion are filled with the first core material end portion reinforcing material, when a tensile load is applied, the skin shape of the FRP molded product 1A is It is possible to improve the strength against peeling at the boundary surface between the core material and the fiber reinforcing material that is the skin material, which are likely to occur at a portion that becomes concave, that is, a portion that shifts in parallel from the tip portion of the core material taper.

  Moreover, in the joint structure of the FRP molded product according to the present invention, the first core material end portion reinforcing member is formed in a U-shaped cross-section that can be fitted into the end portion of the embedded portion of the metal plate. Since the wedge-shaped space is filled with the two end pieces of the shape, the embedded portion of the metal plate can be centered by the first core material end reinforcing material, and the mistake in manufacturing is prevented. be able to.

  Further, in the joint structure of the FRP molded product according to the present invention, the first core material end reinforcing member has a U-shaped fitting portion having a U-shaped cross-section that can fit the end portion of the embedded portion of the metal plate at the tip. In addition, the wedge-shaped space is filled with the U-shaped end pieces of the cross-section, and the rear piece extending from the shoulders of the U-shaped cross-section of the fitting portion to the rear along the tapered portion. Since it is provided, it is possible to easily center the embedded portion of the metal plate and shape and hold the tapered portion of the laminate edge by the first core material end reinforcing member.

  Further, in the joint structure of the FRP molded product according to the present invention, the rear space of the first core material end reinforcing material in the taper portion has a higher rigidity and strength than the core material of the laminate or the core material. Since the first core material end reinforcing material is bonded to the front end of the core material of the laminate or the second core material end reinforcing material, the load resistance performance is further improved. be able to.

  In the joint joining method for FRP molded products according to the present invention, the exposed ends of the metal plates of the FRP molded products to be connected, which serve as the first core material of the joint portion, are butt welded, and the embedded portions of these metal plates are respectively connected. After auxiliary fixing to the main body side of both FRP moldings with bolts and nuts, the joint fixing region including the auxiliary fixing portion and the butt welding portion of these metal plates is the surface of the main body portion of both FRP moldings. The second core material is added so that it is flush, and the second core material added to the joint is sandwiched between fiber reinforcements from the outside, and the resin is impregnated and integrated. Under the fixed state, the second core material is added to the joint portion, the fiber reinforcing material is laminated, and the resin is impregnated. For this reason, the joint joining work of FRP molded products becomes easy.

  In addition, since the connecting joint is composed of a three-dimensional plastically deformable metal plate that becomes the first core of the joint, if there is a mistake in the joint location, the metal plate is plasticized before welding. It can be modified by deformation. For this reason, a force like a spring back does not act on the welded portion after welding, and it becomes easy to ensure reliability. In addition, a metal plate for correcting misalignment, which is a separate body, is interposed between the tips of the exposed portions of both metal plates, and the ends of the exposed portions of these metal plates are butt welded to both ends of the metal plate for correcting misplacement, respectively. , The correction of the mistake can be made at the metal plate portion for correcting the mistake, and the burden on the metal plates on both sides (the bending load for correcting the mistake and the effect of this on the embedded portion, etc.) is eliminated. Alternatively, the reliability can be further improved.

Embodiment 1 FIG.
Hereinafter, the present invention will be described based on illustrated embodiments.
FIG. 1 is a sectional view showing a joint structure of an FRP molded product according to Embodiment 1 of the present invention, and FIG. 2 is a process diagram showing the joint joining method.

  The FRP molded product 1 according to the present embodiment is configured by laminating the same sheet-like fiber reinforcements 3a and 3b that serve as FRP skin materials on both outer sides of the main body portion, for example, with the sheet-like core material 2 in the middle. In addition, a metal plate (for example, SUS) serving as a first core material of the joint portion 5 is formed on an end edge portion (here, a portion where the core material 2 is not provided and only the fiber reinforcing materials 3a and 3b are laminated). ) The one end side 4a of 4 is embedded so that the plate thickness center plane thereof coincides with the plate thickness center plane of the laminate, that is, the main body, and is integrated by resin impregnation and curing. Moreover, the joint side edge part of the main-body part of the FRP molded object 1 is formed in the taper part 10 in which a front-end | tip reduces toward the said metal plate.

  The joint portion 5 has one end side which is an embedded portion of the metal plates 4, 4, with the tips of the exposed portions 4 b, 4 b of the metal plates 4, 4 being butt welded between the adjacent FRP molded products 1, 1. 4a and 4a are fixedly secured by bolts 6 and nuts 7 to the main body side of both FRP molded products 1 and 1, respectively, here on the edge where only the fiber reinforcements 3a and 3b are laminated. Furthermore, the second core material is such that the entire joint portion including the auxiliary fixing portion by the bolt 6 and the nut 7 and the butt weld portion 8 is flush with the surfaces of the main body portions of the FRP molded products 1, 1. A core material 9 is added and sandwiched between fiber reinforcements 11a and 11b from the outside, impregnated with resin, cured, and integrated into a plate shape.

  More specifically, the core material 2 of the main body is made of a core-forming material such as polyurethane impregnated with resin, but in addition to polyurethane, polystyrene, polyethylene, polypropylene, silicon, poly Lightweight materials such as vinyl chloride foam and balsa can also be used. In addition, the second core material 9 of the joint portion 5 is formed by filling the foaming agent while the protruding bolt 6 and nut 7 portions are molded with a putty, but the core material of the main body portion instead of the foaming agent. It is also possible to use the same material as 2.

  As the fiber reinforcements 3a and 3b, woven fabrics and mats such as carbon fibers, glass fibers, and aramid fibers can be used.

  The resin to be injected serves as a matrix resin for the molded product, and thermosetting resins such as epoxy resins, vinyl ester resins, and unsaturated polyester resins can be used.

  Next, the joint joining method of the FRP molded product according to the present embodiment will be described with reference to FIG. First, the fiber reinforcements 3a and 3b and the core material 2 are laminated with the core material 2 in the middle, and the metal plate 4 serving as the first core material of the joint portion 5 is formed on the edge portion serving as the joint portion 5 of the laminate. FRP molded product (for example, FRP hull block) 1 in which one end side 4a is embedded so that the plate thickness center plane coincides with the laminate, that is, the plate thickness center plane of the main body, and impregnated with resin. (A). Next, the tips of the exposed portions 4b and 4b of the metal plates 4 and 4 of the FRP molded products 1 and 1 to be connected are opposed to each other (b) and butt-welded (c). Next, the embedded portions of these metal plates 4, 4, that is, the one end sides 4 a, 4 a are respectively laminated by bolts 6 and nuts 7 on the main body side of the FRP molded products 1, 1 (here, only the fiber reinforcements 3 a, 3 b are laminated). (D) which is supplementarily fixed to the edge portion). Thereafter, the main body (the part containing the core material 2) of these FRP molded products 1 and 1 is provided over the entire joint part including the auxiliary fixing part by the bolt 6 and the nut 7 of the metal plates 4 and 4 and the butt welding part 8. The second core material 9 is added so as to be flush with the surface (e), and further, the core material 9 is sandwiched between the fiber reinforcements 11a and 11b from the outside and impregnated with resin to be integrated (f).

  As described above, according to the present embodiment, the tips of the exposed portions 4b and 4b of the metal plates 4 and 4 serving as the first core material of the joint portion 5 are butt-welded between the FRP molded products 1 and 1 to be joined together. At the same time, the embedded portions, that is, the one end sides 4a and 4a of both metal plates 4 and 4 are fixed to the main body side of both FRP molded products 1 and 1 by bolts and nuts 6 and 7, respectively. The second core material 9 is added so that the entire joint portion including the butt weld portion 8 is flush with the surfaces of the main body portions of the FRP molded products 1, 1, and the fiber reinforcements 11 a, 11 b are used from the outside. Since they are sandwiched and impregnated with resin and integrated, the coupling strength of the joint portion 5 can be increased, and the protrusion (exposure) of the bolt head or nut to the surface of the joint portion 5 can be prevented. For this reason, it is also possible to apply the FRP molded product 1 to a hull block of a relatively large boat, and in that case, it is possible to prevent an increase in water flow resistance and a deterioration in aesthetics.

  In addition, since the connecting joint is composed of the metal plates 4 and 4 that can be plastically deformed three-dimensionally, if there is a difference in the joint location, the metal plate between the adjacent FRP molded products 1 and 1 is used. The metal plates 4 and 4 can be modified by plastic deformation before butt welding the tips of the exposed portions 4b and 4b. For this reason, a force like a spring back does not act on the welded portion after welding, and it becomes easy to ensure reliability.

  In addition, since the connecting joint is fixed by butt welding and bolts and nuts 6 and 7, the second core material 9 and the fiber reinforcing materials 11 a and 11 b serving as the skin in the connecting joint are laminated and the resin is impregnated. , FRP moldings 1 and 1 can be easily joined together.

Embodiment 2. FIG.
FIG. 3 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 2 of the present invention, and FIG. 4 is a process diagram showing a joint joining method thereof. The same parts are denoted by the same reference numerals.

  The FRP molded product 1 according to this embodiment has the same configuration as that of the first embodiment described above. That is, the FRP molded product 1 is configured by laminating sheet-like fiber reinforcements 3a and 3b, which are FRP skin materials, on both outer sides of a sheet-like core material 2 in the main body portion. One end of a metal plate (for example, SUS) 4 serving as a first core material of the joint portion 5 on an end edge portion (a portion where the core material 2 is not provided and only the fiber reinforcing materials 3a and 3b are laminated) The side 4a is embedded in such a manner that its thickness center plane coincides with that of the laminate, that is, the thickness center plane of the main body, and is impregnated with resin and cured to be integrated. Moreover, the joint side edge part of the main-body part of the FRP molded object 1 is formed in the taper part 10 in which a front-end | tip reduces toward the said metal plate.

  The joint portion 50 is opposed to the adjacent FRP molded products 1 and 1 via the misalignment correcting metal plate 40 in which the tips of the exposed portions 4b and 4b of the metal plates 4 and 4 are separately formed. The metal plate 40 is butt welded to both ends (welded portions 8a and 8b), and one end sides 4a and 4a, which are embedded portions of the metal plates 4 and 4 on both sides, are respectively connected by bolts 6 and nuts 7, respectively. The FRP molded products 1 and 1 are fixed to the main body side, that is, the edge portion where only the fiber reinforcements 3a and 3b are laminated, and the auxiliary fixing portion by the bolts 6 and nuts 7 and both. A core material 9 as a second core material is added so that the entire joint portion including the butt welds 8a and 8b is flush with the surfaces of the main body portions of both FRP molded products 1 and 1, and fiber reinforced from the outside. Sandwiched between materials 11a and 11b, impregnated with resin, hard It is being integrated in a plate shape.

  Next, the joint joining method of the FRP molded product according to the present embodiment will be described with reference to FIG. First, the fiber reinforcements 3a and 3b and the core material 2 are laminated with the core material 2 in the middle, and the metal plate 4 serving as the first core material of the joint portion 5 is formed on the edge portion serving as the joint portion 5 of the laminate. FRP molded product (for example, FRP hull block) 1 in which one end side 4a is embedded so that the plate thickness center plane coincides with the laminate, that is, the plate thickness center plane of the main body, and impregnated with resin. (A). Next, the front ends of the exposed portions 4b and 4b of the metal plates 4 and 4 of the FRP molded products 1 and 1 to be connected are opposed to each other through a metal plate 40 for correcting misalignment (b), and the misalignment is corrected. Butt welding is performed on both ends of the metal plate 40 (c). Next, the embedded portions of the metal plates 4 and 4 on both sides, that is, the one end sides 4a and 4a are respectively laminated by bolts 6 and nuts 7 on the main body side (only the fiber reinforcements 3a and 3b are laminated). (D) which is supplementarily fixed to the edge portion). Thereafter, the main body of the FRP moldings 1 and 1 (with the core material 2 is contained) over the entire joint including the auxiliary fixing portion of the metal plates 4 and 4 by the bolt 6 and the nut 7 and the butt welds 8a and 8b. The second core material 9 is added so as to be flush with the surface of the portion (e) (e), and the core material 9 is further sandwiched between the fiber reinforcements 11a and 11b from the outside and impregnated with resin to be integrated (f).

  Thus, according to the present embodiment, the connecting joint is constituted by the metal plates 4, 4 that can be plastically deformed three-dimensionally, and between the tips of the exposed portions 4b, 4b of the two metal plates 4, 4. In addition, a metal plate 40 for correcting misalignment made of a separate body that can be plastically deformed three-dimensionally is interposed, and the tips of the exposed portions 4b and 4b of the metal plates 4 and 4 are arranged at both ends of the metal plate 40 for misalignment correcting. In addition to the functions and effects of the first embodiment described above, it is possible to make a correction of a mistake in the metal plate 40 for correcting a mistake, so that the metal plates on both sides can be corrected. 4. The load on 4 and 4 (folding load for correcting misalignment and the effect of this on the embedded part) can be eliminated or reduced, and the reliability can be further improved. .

Embodiment 3 FIG.
5 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 3 of the present invention, FIG. 6 is an explanatory view of a stress concentration portion when a compressive load is applied to the FRP molded product, and FIG. 7 is an FRP molded product. FIG. 6 is an explanatory diagram of a stress concentration portion when a tensile load is applied to the same portion, and in each drawing, the same reference numerals are given to the same portions as those of the first embodiment described above. In addition, regarding the joint joining method of the FRP molded product according to the present embodiment, the joining method in which the metal plates that are the first core materials of the joint portion are directly butt welded as in the first embodiment described above, As in the second embodiment, any joining method in which the metal plates that are the first cores of the joint portion are butt welded via the miscorrection correcting metal plates can be adopted, and the description thereof can be applied. For this reason, the description about the joint joining method is omitted, and here, the joint structure of the FRP molded product will be mainly described.

  The FRP molded product 1A according to the present embodiment is changed from the auxiliary fixing portion by the bolt 6 and the nut 7 to the tapered portion 10 at the joint side edge portion of the main body portion, and further from the tapered portion 10 to the linear portion of the main body portion. Metal pad plates 61 and 62 are attached to and bonded to both surfaces of the joint portion so as to cover up to the point portion 10 a, and these pad plates 61 and 62 together with one end side 4 a which is an embedded portion of the metal plate 4. The bolts and nuts 6 and 7 are fixed to the main body side in an auxiliary manner. That is, the contact plates 61 and 62 are bent and formed on one end side of the straight portions 61a and 62a so as to cover the taper portion 10 and the straight portions 61a and 62a that disperse the surface pressure at the time of bolt fastening. The first knuckle portions 61b and 62b that suppress deformation in the plate thickness direction of the portion 10 and the second knuckle portion 61c that is bent so as to cover the change portion 10a and suppress deformation in the plate thickness direction of the change portion 10a. , 62c.

  In addition, the end 4c of the embedded portion of the metal plate 4 is inserted and arranged in the tapered portion 10 so as to be on the tip portion of the tapered portion 10, and the inner surface of the tapered portion 10 in the fiber reinforcements 3a and 3b serving as the skin of the laminate In a wedge-shaped space formed between both surfaces of the end portion of the embedded portion of the metal plate 4, that is, both surfaces of the insertion portion in the taper portion 10 of the metal plate 4, first core material end reinforcing members 71 made of putty, 72 is filled. Other configurations are the same as those of the first embodiment.

  As shown in FIGS. 6 and 7, the contact plates 60 a and 60 b are formed only from a short straight portion having only a function of dispersing the surface pressure at the time of bolt fastening, and the end 4 c of the embedded portion of the metal plate 4 is a tapered portion 10. When a compression load is applied as shown in FIG. 6 when a wedge-shaped space is not formed at the tip of the taper portion 10 and the end of the core material is not reinforced, At the end portion of the main body portion of 1A, that is, the start portion A of the core material taper, a part (component force) of the compressive force works as a force for peeling the skin of the taper portion 10, that is, the fiber reinforcements 3a and 3b. Further, as shown in FIG. 7, under tension load, the tension acts so that the skin becomes a straight line, and therefore, the portion where the skin shape of the FRP molded product 1A becomes concave, that is, the portion where the tip of the core taper transitions in parallel. In B, it acts as a force to peel the skin, that is, the fiber reinforcements 3 a and 3 b from the metal plate 4.

  In the joint structure of the FRP molded product according to the present embodiment, the FRP molded product 1A includes a taper portion 10 at the joint-side edge portion of the body portion from the auxiliary fixing portion by the bolt 6 and the nut 7 and further from the taper portion 10 to the body portion. The metal backing plates 61 and 62 are attached to and bonded to both surfaces of the joint portion so as to cover up to the change point portion 10 a to the straight portion of the metal plate 4. Are fixed to the main body side by the bolts and nuts 6 and 7 together with the one end side 4a. When an in-plane load such as compression or tension is applied to the FRP molded product 1A, The stress generated in the FRP molded product 1 </ b> A can be shared by the contact plates 61 and 62. For this reason, when the compressive load is applied, local concentration of stress generated at the end of the main body of the FRP molded product 1A, that is, the starting portion A of the core taper can be reduced by the contact plates 61 and 62, and the FRP molded product The deformation in the plate thickness direction of 1A can be suppressed, and the strength against peeling at the boundary surface between the core material 2 and the fiber reinforcements 3a and 3b as the skin material at the start portion A of the core material taper can be improved. Needless to say, such load-bearing performance is further enhanced by bonding the contact plates 61 and 62 to both surfaces of the joint as described above.

  In addition, the end 4c of the embedded portion of the metal plate 4 is inserted and arranged in the tapered portion 10 so as to be on the tip portion of the tapered portion 10, and the inner surface of the tapered portion 10 in the fiber reinforcements 3a and 3b serving as the skin of the laminate In a wedge-shaped space formed between both surfaces of the end portion of the embedded portion of the metal plate 4, that is, both surfaces of the insertion portion in the taper portion 10 of the metal plate 4, first core material end reinforcing members 71 made of putty, 72 is filled, so that when the tensile load is applied, the stress that is generated in the portion B that becomes the concave portion of the joint portion due to the property that the skin tends to be straight, that is, the portion B that moves in parallel from the tip portion of the core taper Can be mitigated by the first core material end reinforcements 71 and 72, and the strength against delamination at the boundary surface between the core material 2 and the fiber reinforcements 3a and 3b as the skin material in the portion B is improved. It can be. Furthermore, since the local concentration of the stress generated in the portion B can be reduced by the contact plates 61 and 62, the strength against peeling at the boundary surface between the core material 2 and the fiber reinforcements 3a and 3b as the skin material in the portion B Can be further improved.

Embodiment 4 FIG.
FIG. 8 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 4 of the present invention. In the figure, parts corresponding to those of the above-described third embodiment are denoted by the same reference numerals. As for the joint joining method of the FRP molded product according to this embodiment, the joining method of directly butting the metal plates that are the first core material of the joint part as in the first embodiment described above, As in the second embodiment, any joining method in which the metal plates that are the first cores of the joint portion are butt welded via the miscorrection correcting metal plates can be adopted, and the description thereof can be applied. For this reason, the description about the joint joining method is omitted, and here, the joint structure of the FRP molded product will be mainly described.

  In the FRP molded product 1B according to the present embodiment, the first core material end reinforcing member 73 has the function of centering the embedded portion of the metal plate 4 and the function of forming and holding the tapered portion 10 of the joint side edge portion. Is.

  More specifically, the first core material end reinforcing member 73 is made of aluminum, and has a U-shaped fitting portion 73e having a U-shaped cross section that can fit the end 4c of the embedded portion of the metal plate 4 at the tip. Both end pieces 73a and 73b having a U-shaped cross section are inserted into the aforementioned wedge-shaped space (the putty filling portion in FIG. 5), and the tapered portion 10 is rearward from both shoulder portions having a U-shaped cross section in the fitting portion 73e. Are provided with rear piece portions 73c and 73d extending in a divergent shape along the edge. Other configurations are the same as those of the third embodiment described above.

  In the joint structure of the FRP molded product of the present embodiment, the first core material end reinforcing member 73 is made of aluminum, and a fitting portion having a U-shaped cross section that can fit the end 4c of the embedded portion of the metal plate 4 at the tip. 73e, and the wedge-shaped space is filled with both end pieces 73a and 73b having a U-shaped cross section, and extends from the shoulders of the U-shaped cross section of the fitting portion 73e to the rear along the tapered portion 10 in a divergent shape. Since the rear piece portions 73c and 73d are provided, the embedded portion of the metal plate 4 can be centered by the first core material end reinforcing material 73 in addition to the stress relaxation effect by the contact plates 61 and 62. In addition, it is possible to prevent mistakes during production, and it is possible to easily form and hold the tapered portion 10 at the edge of the laminate.

Embodiment 5. FIG.
FIG. 9 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 5 of the present invention. In the figure, parts corresponding to those of the above-described third embodiment are denoted by the same reference numerals. As for the joint joining method of the FRP molded product according to this embodiment, the joining method of directly butting the metal plates that are the first core material of the joint part as in the first embodiment described above, As in the second embodiment, any joining method in which the metal plates that are the first cores of the joint portion are butt welded via the miscorrection correcting metal plates can be adopted, and the description thereof can be applied. For this reason, the description about the joint joining method is omitted, and here, the joint structure of the FRP molded product will be mainly described.

  The FRP molded product 1C according to the present embodiment fills the wedge-shaped space with the first core material end reinforcing members 71 and 72 made of putty and the tapered portion 10 as in the third embodiment described above. The space behind the first core material end reinforcing members 71 and 72 is filled with a second core material end reinforcing material 74 made of, for example, wood having higher rigidity and strength than the core material 2 of the main body, and the second core material. The first core material end reinforcements 71 and 72 are bonded to the tip of the end reinforcement 74. Other configurations are the same as those of the third embodiment described above.

  In the joint structure of the FRP molded product according to the present embodiment, the wedge-shaped space is filled with the first core material end reinforcing materials 71 and 72 made of putty, and the first core material end reinforcing material 71 in the tapered portion 10 is used. , 72 is filled with a second core material end reinforcing material 74 made of, for example, wood having higher rigidity and strength than the core material 2 of the main body, and the first core material end reinforcing material 74 has a first end at the tip thereof. In addition to the stress relaxation effect by the contact plates 61 and 62, the load bearing performance against compression and tension can be further improved.

  In addition, the rear space of the first core material end reinforcement described in the present embodiment is filled with a second core material end reinforcement made of, for example, wood having higher rigidity and strength than the core material 2 of the main body, Needless to say, the bonding of the first core material end reinforcing material to the tip of the second core material end reinforcing material is also applicable to the third and fourth embodiments described above.

Embodiment 6 FIG.
FIG. 10 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 6 of the present invention. In the figure, parts corresponding to those of the above-described fourth and fifth embodiments are denoted by the same reference numerals. It is. As for the joint joining method of the FRP molded product according to this embodiment, the joining method of directly butting the metal plates that are the first core material of the joint part as in the first embodiment described above, As in the second embodiment, any joining method in which the metal plates that are the first cores of the joint portion are butt welded via the miscorrection correcting metal plates can be adopted, and the description thereof can be applied. For this reason, the description about the joint joining method is omitted, and here, the joint structure of the FRP molded product will be mainly described.

  In the FRP molded product 1D according to the present embodiment, the first core material end reinforcing member 75 is formed of aluminum having a U-shaped cross section that can be fitted into the end 4c of the embedded portion of the metal plate 4, and has a U-shaped cross section. Both end piece portions 75a and 75b are inserted into the aforementioned wedge-shaped space (the putty filling portion in FIG. 9). Further, the rear space of the first core material end reinforcing member 75 in the taper portion 10 is filled with a second core material end reinforcing material 74 made of, for example, wood having higher rigidity and strength than the core material 2 of the main body portion, The first core material end reinforcing material 75 is bonded to the tip of the second core material end reinforcing material 74. Other configurations are the same as those of the fourth and fifth embodiments described above.

  In the joint structure of the FRP molded product of the present embodiment, the first core material end reinforcing member 75 is formed from aluminum having a U-shaped cross section that can be fitted into the end 4c of the embedded portion of the metal plate 4, and the U-shaped cross section. Since the wedge-shaped space is filled with the two end pieces 75a and 75b, the first core material end reinforcing member 75 adds the stress of the pad plate 61 and 62 to the embedded portion of the metal plate 4. Centering can be performed, and mistakes during production can be prevented.

  Further, the rear space of the first core member end reinforcing member 75 in the taper portion 10 is filled with a second core member end reinforcing member 74 made of, for example, wood having higher rigidity and strength than the core member 2 of the main body, Since the first core material end reinforcing material 75 is bonded to the tip of the second core material end reinforcing material 74, the load resistance performance against compression and tension can be further improved.

Embodiment 7 FIG.
FIG. 11 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 7 of the present invention. In the drawing, parts corresponding to those of the above-described third embodiment are denoted by the same reference numerals. As for the joint joining method of the FRP molded product according to this embodiment, the joining method of directly butting the metal plates that are the first core material of the joint part as in the first embodiment described above, As in the second embodiment, any joining method in which the metal plates that are the first cores of the joint portion are butt welded via the miscorrection correcting metal plates can be adopted, and the description thereof can be applied. For this reason, the description about the joint joining method is omitted, and here, the joint structure of the FRP molded product will be mainly described.

  In the FRP molded product 1E according to the present embodiment, the metal contact plates 63 and 64 that are attached and bonded to both surfaces of the joint portion are straight portions 63a and 64a that cover the auxiliary fixing portions by the bolts 6 and the nuts 7, respectively. However, the base end side (FRP molded product main body side) 63b, 64b is different from the taper portion 10 in FIG. 6 and FIG. It extends until just before.

  Further, the end 4c of the embedded portion of the metal plate 4 is inserted and arranged in the tapered portion 10 so as to cover the tip portion of the tapered portion 10 as in the third to sixth embodiments described above, and becomes the skin of the laminate. In the wedge-shaped spaces respectively formed between the inner surface of the taper portion 10 in the fiber reinforcements 3a and 3b and both surfaces of the end portion of the embedded portion of the metal plate 4, that is, both surfaces of the insertion portion in the taper portion 10 of the metal plate 4, The first core material end reinforcing members 71 and 72 made of putty are filled. Other configurations are the same as those of the third embodiment described above.

  In the joint structure of the FRP molded product of the present embodiment, the contact plates 63 and 64 are connected to the taper portion 10 at the joint side edge of the main body portion from the auxiliary fixing portion by the bolt 6 and the nut 7 of the FRP molded product 1E. Since it is provided to extend just before, the stress generated when the tensile load is applied to the FRP molded product 1E can be shared by the contact plates 63 and 64. Further, the end 4c of the embedded portion of the metal plate 4 is inserted and arranged in the taper portion 10 so that the wedge-shaped space formed between the metal plate 4 and the fiber reinforcing materials 3a and 3b as the skin material is put into the wedge-shaped space. Since the first core material end reinforcing members 71 and 72 are filled, the local portion of the stress generated in the portion B (see FIG. 7) that shifts in parallel from the tip portion of the core material taper when a tensile load is applied. Concentration can also be relaxed by the first core material end reinforcements 71 and 72. For this reason, the intensity | strength with respect to peeling in the interface of the core material 2 in the part B and the fiber reinforcements 3a and 3b which are skin materials can be improved.

  In addition, the abutting plates 63 and 64 do not need to form a knuckle portion at all, and can be formed of a straight plate, so that they are very easy to manufacture.

  Needless to say, the second core material end reinforcing member 74 described in the fifth and sixth embodiments can also be applied to this embodiment.

  Also in the present embodiment, the first core end reinforcing member 73 made of aluminum described in the fourth embodiment and the aluminum having a U-shaped cross section described in the sixth embodiment are used. It goes without saying that one core material end reinforcing member 75 can be applied.

Embodiment 8 FIG.
FIG. 12 is a cross-sectional view showing a joint structure of an FRP molded product according to Embodiment 8 of the present invention. In the drawing, portions corresponding to those of the above-described third embodiment are denoted by the same reference numerals. As for the joint joining method of the FRP molded product according to this embodiment, the joining method of directly butting the metal plates that are the first core material of the joint part as in the first embodiment described above, As in the second embodiment, any joining method in which the metal plates that are the first cores of the joint portion are butt welded via the miscorrection correcting metal plates can be adopted, and the description thereof can be applied. For this reason, the description about the joint joining method is omitted, and here, the joint structure of the FRP molded product will be mainly described.

  In the FRP molded product 1F according to the present embodiment, the metal backing plates 65 and 66 that are attached to and bonded to both surfaces of the joint portion are connected from the auxiliary fixing portion by the bolt 6 and the nut 7 to the joint of the main body portion. It is formed so as to cover up to the taper portion 10 at the side edge. That is, the contact plates 65 and 66 are bent and formed on one end side of the straight portions 65a and 66a so as to cover the taper portion 10 and the straight portions 65a and 66a that disperse the surface pressure at the time of bolt fastening. It is comprised from the 1st knuckle part 65b, 66b which suppresses the thickness direction deformation | transformation of the part 10. As shown in FIG. That is, it differs from the above-mentioned third embodiment in that the second knuckle portion is not provided. Other configurations are the same as those of the third embodiment described above.

  In the joint structure of the FRP molded product of the present embodiment, the contact plates 65 and 66 are moved from the auxiliary fixing portion by the bolt 6 and the nut 7 of the FRP molded product 1F to the tapered portion 10 at the joint side edge of the main body. Metal backing plates 65 and 66 are attached to both surfaces of the joint portion so as to cover the joint portion, and these backing plates 65 and 66 are respectively connected to the bolts together with the one end side 4a which is the embedded portion of the metal plate 4.・ Since it is fixed on the main body side by nuts 6 and 7, when the in-plane load such as compression or tension is applied to the FRP molded product 1F, the stress generated in the FRP molded product 1A is applied. The plates 61 and 62 can also be shared. For this reason, when the compressive load is applied, local concentration of stress generated at the end of the main body portion of the FRP molded product 1F, that is, the starting portion A of the core taper (see FIG. 6) can be reduced by the contact plates 65 and 66. At the same time, deformation in the plate thickness direction of the FRP molded product 1F can be suppressed, and the strength against peeling at the boundary surface between the core material 2 and the fiber reinforcements 3a and 3b as the skin material at the start portion A of the core material taper is improved. be able to.

  Similarly to the third embodiment described above, the end 4c of the embedded portion of the metal plate 4 is inserted and arranged in the taper portion 10 so that the metal plate 4 and the fiber reinforcements 3a and 3b, which are skin materials, are arranged. Since the wedge-shaped space formed between them is configured to be filled with the first core material end reinforcements 71 and 72 made of putty, when a tensile load is applied, it is parallel to the tip of the core material taper. The local concentration of stress generated in the transition portion B (see FIG. 7) can also be reduced by the first core material end reinforcing members 71 and 72. For this reason, the intensity | strength with respect to peeling in the interface of the core material 2 in the part B and the fiber reinforcements 3a and 3b which are skin materials can be improved.

  Further, the abutting plates 65 and 66 are easy to manufacture because the knuckle portions are only the first knuckle portions 65b and 66b and there is no need to form the second knuckle portions.

  In addition, it cannot be overemphasized that the 2nd core material edge part reinforcing material demonstrated in the above-mentioned 5th and 6th embodiment is applicable also in this embodiment.

  Also in the present embodiment, the first core end reinforcing member 73 made of aluminum described in the fourth embodiment and the aluminum having a U-shaped cross section described in the sixth embodiment are used. It goes without saying that one core material end reinforcing member 75 can be applied.

It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 1 of this invention. 5 is a process diagram illustrating a joint joining method for FRP molded products according to Embodiment 1. FIG. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 2 of this invention. 6 is a process diagram illustrating a joint joining method for FRP molded products according to Embodiment 2. FIG. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 3 of this invention. It is explanatory drawing of the stress concentration part when a compressive load is added to the FRP molded object. It is explanatory drawing of the stress concentration part when the tensile load is added to the FRP molded object. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 5 of this invention. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 6 of this invention. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 7 of this invention. It is sectional drawing which shows the joint structure of the FRP molded product which concerns on Embodiment 8 of this invention.

Explanation of symbols

1, 1A, 1B, 1C, 1D, 1E, 1F FRP molding 2,9 Core material 3a, 3b, 11a, 11b Fiber reinforcement 4 Metal plate (first core material of the joint)
4a One end side of metal plate (embedded part of metal plate)
4b Exposed portion of metal plate 4c End of embedded portion of metal plate 5,50 Joint portion 6 Bolt 7 Nut 8, 8a, 8b Butt weld 9 Core material (second core material)
DESCRIPTION OF SYMBOLS 10 Tapered part 40 Metal plate 61 for misalignment correction 61, 62, 63, 64, 65, 66 Metal backing plate 71, 72, 73, 75 1st core material edge part reinforcement 73a, 73b, 75a, 75b Character-shaped both end piece parts 73c, 73d Rear piece part 73e Fitting part with a U-shaped cross section 74 Second core material end part reinforcing material

Claims (10)

Fiber reinforcing materials are laminated on both outer sides with the core material in the middle, and one end side of the metal plate that is the first core material of the joint portion is centered on the edge of the laminate portion. The FRP molded product in which the surface is embedded so as to coincide with the central thickness plane of the laminate and impregnated with resin, and the FRP molded product in which these are integrated is joined and joined between adjacent FRP molded products via the metal plate. A joint structure,
In the joint structure, the tips of the exposed portions of the metal plates are butt welded between adjacent FRP molded products, and the embedded portions of these metal plates are respectively connected to the main body side of both FRP molded products by bolts and nuts. Further, the second core material is added so that the entire joint portion including the auxiliary fixing portion and the butt weld portion is flush with the surfaces of the main body portions of both FRP molded products. A joint structure of an FRP molded product, which is sandwiched between fiber reinforcements from outside and integrated by resin impregnation. Fiber reinforcing material is laminated on both outer sides with the core material in the middle, and one end side of the metal plate serving as the first core material of the joint portion is disposed on the edge portion serving as the joint portion of the laminate. Embedded in resin so that it coincides with the center plane of the thickness of the laminate, impregnated with resin, and an FRP molded product in which these are integrated is connected and joined between adjacent FRP molded products via the metal plate Structure,
In the joint structure, the tips of the exposed portions of the metal plate face each other between the adjacent FRP moldings via a separate metal plate for correcting the misalignment, and butt against both ends of the misalignment correcting metal plate, respectively. The embedded portions of the two metal plates are auxiliaryly fixed to the main body side of both FRP moldings by bolts and nuts, respectively, and the auxiliary fixing portion and both the butt weld portions and A second core material is added so that the entire joint including the misalignment correcting metal plate is flush with the surface of the main body of both FRP molded products, and sandwiched between fiber reinforcements from the outside, resin impregnation FRP molded product joint structure characterized by being integrated with each other.   The joint side edge portion of the main body portion of the FRP molded product is formed at a tapered portion whose tip decreases toward the metal plate, and covers from the auxiliary fixing portion to immediately before the tapered portion. In this way, a metal backing plate is attached to and bonded to both surfaces of the joint portion, and these backing plates, together with the embedded portion of the metal plate, are each auxiliary to the main body side of the FRP molded product by the bolts and nuts. The joint structure for an FRP molded product according to claim 1 or 2, wherein the joint structure is fixed.   The joint side edge of the main body of the FRP molded product is formed in a tapered portion whose tip is reduced toward the metal plate, and covers from the auxiliary fixing portion to the tapered portion. Metal backing plates are attached to and bonded to both surfaces of the joint portion, and these backing plates are supplementarily attached to the body side of the FRP molded product by the bolts and nuts together with the embedded portions of the metal plates. The joint structure for an FRP molded product according to claim 1 or 2, wherein the joint structure is fixed.   The embedded portion on one end side of the metal plate is disposed so that the end thereof is on the tip end portion of the tapered portion, and at least the inner surface of the tapered portion in the fiber reinforcing material serving as the skin of the laminate and the metal plate 5. The FRP molded product according to claim 3, wherein the wedge-shaped spaces formed between both ends of the embedded portion are filled with a first core material end reinforcing material. 6. Joint structure.   The first core material end reinforcing member is formed in a U-shaped cross-section that can be fitted into the end portion of the embedded portion of the metal plate, and the wedge-shaped space is filled with both end pieces of the U-shaped cross-section. The joint structure for an FRP molded product according to claim 5, wherein   The first core material end portion reinforcing member has a U-shaped fitting section that can be fitted into a distal end portion of the embedded portion of the metal plate at the tip, and the wedge-like shape is formed by both end pieces of the U-shaped section. The space is filled, and a rear piece extending from the both shoulders having a U-shaped cross section of the fitting portion to the rear along the tapered portion is provided. 5. Joint structure of FRP molded product according to 5.   The rear space of the first core material end reinforcing material in the tapered portion is filled with the core material of the laminate or the second core material end reinforcing material having higher rigidity and strength than the core material, The FRP according to any one of claims 3 to 7, wherein the first core material end reinforcing material is bonded to a tip of the core material of the laminate or the second core material end reinforcing material. Molded joint structure. The fiber reinforcing material and the core material are laminated with the core material in the middle, and one end side of the metal plate serving as the first core material of the joint portion is disposed on the edge portion serving as the joint portion of the laminate. Is embedded so as to coincide with the plate thickness center plane of the laminate, impregnated with resin, and obtaining an FRP molded product in which these are integrated, and
A step of facing the exposed ends of the metal plates of the FRP moldings to be connected to each other and butt welding;
A step of auxiliaryly fixing the embedded portions of these metal plates to the main body side of both FRP moldings with bolts and nuts,
Adding a second core material such that the entire joint part including the auxiliary fixing part and the butt weld part of these metal plates is flush with the surfaces of the main body parts of both FRP molded products;
Sandwiching the second core material added to the joint part from the outside with a fiber reinforcement, impregnating with resin, and integrating;
A method for joining joints of FRP moldings, comprising: The fiber reinforcing material and the core material are laminated with the core material in the middle, and one end side of the metal plate serving as the first core material of the joint portion is disposed on the edge portion serving as the joint portion of the laminate. Is embedded so as to coincide with the plate thickness center plane of the laminate, impregnated with resin, and obtaining an FRP molded product in which these are integrated, and
A step of opposingly arranging the tips of the exposed portions of the metal plates of the FRP moldings to be connected to each other via a metal plate for correcting misalignment made of a separate body;
A process of butt-welding the ends of the exposed metal plates of the FRP moldings to be connected to both ends of the metal plate for correcting misalignment,
A step of auxiliaryly fixing the embedded portions of these metal plates to the main body side of both FRP moldings with bolts and nuts,
The second core material is arranged so that the entire joint portion including the auxiliary fixing portion of the metal plates, the butt weld portions, and the misalignment correcting metal plate is flush with the surfaces of the main body portions of both FRP molded products. An additional process;
Sandwiching the second core material added to the joint part from the outside with a fiber reinforcement, impregnating with resin, and integrating;
A method for joining joints of FRP moldings, comprising:

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