JP2013154535A - Butt joint for frp-made plate and butt joining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a butt joint for FRP-made plates, and a butt joining method which provides tensile strength comparable with that of the joint formed by the secondary lamination of a fiber fabric and can thereby prevent abrupt breakage even if initial breakage is generated by a load.SOLUTION: A butt joint 1 for FRP plates butt-joins respective end surfaces WE and WE of a pair of the FRP plates W and W and includes adhered FRP layers 2 and 2 laminated so as to extend over individual front surfaces Wf and Wf and back surfaces Wb and Wb of the pair of FRP plates W and W with end surfaces WE and WE joined temporarily, two oblique holes 2a and 2b which are formed in such a way as to be inclined in two mutually-conflicting directions with respect to the axes perpendicular to the adhered FRP layer 2 and to be aligned in the width direction at both ends of the adhered FRP layer 2 so as to penetrate the adhered FRP layer 2 and enter the FRP plate W and pins 3 and 3 inserted into the oblique holes 2a and 2b, respectively.

Description

  In the present invention, for example, when an FRP product such as a large ship is manufactured, an FRP plate constituting the FRP product (an FRP plate alone and an FRP composite plate in which a core material is sandwiched between FRP plates (referred to as an FRP sandwich plate). ) And the butt-joining method of the FRP plate used for joining the end faces of each other.

  For example, a large ship made of FRP is manufactured by connecting many blocks, and these blocks are assembled by joining end faces of FRP plates constituting each block.

  When metal bolts are used for joining the above-mentioned FRP plates, the increase in weight, the occurrence of electrical corrosion due to the combination with CFRP (Carbon Fiber Reinforced Plastics) plates, and the surface pressure strength is lower than that of steel plates. Since problems such as slippage and deterioration of watertightness due to the absence of high tightening torque occur, conventionally, in addition to simple lap joints and scarf joints, fiber woven fabrics are secondarily laminated or molded FRP plates are used. The end faces of the FRP plates are butt-joined and joined using a joint formed by bonding (Patent Document 1).

  In the joint method between the FRP base materials described in Patent Document 1, the FRP base material is woven between the layers of the FRP base material at least at one position in the thickness direction at the end of the FRP base material forming the groove. The FRP base materials are butt-joined by exposing the joint layer and weaving the joint layer between the layers of the secondary laminated portion laminated at the groove between the FRP base materials.

JP 10-058549 A

  However, in the joint method between the FRP base materials described in Patent Document 1 described above, the joint layer is woven between the layers of the secondary laminated portion laminated on the groove between the FRP base materials, so that high strength is obtained. However, if an initial failure due to a shear load occurs between the FRP base material and the secondary laminated portion laminated on the groove, the secondary laminated portion may be peeled off from the groove and may be abruptly broken. There is a problem that exists, and it has been a conventional problem to solve this problem.

  The present invention has been made by paying attention to the above-described conventional problems, and it is needless to say that the same tensile strength as that of a joint formed by secondary lamination of fiber fabrics or adhesion of a molded FRP plate can be obtained. An object of the present invention is to provide a butt joint and a butt joint method for FRP plates that can prevent the occurrence of a sudden rupture even if an initial breakage due to a shear load occurs.

  The invention according to claim 1 of the present invention is a butt joint of FRP plates that butt-joins each end surface of a pair of FRP plates, and each surface of the pair of FRP plates that is temporarily joined to each other. And an adhesive FRP layer laminated over each back surface, and inclining in directions opposite to each other with respect to an axis orthogonal to the adhesive FRP layer and penetrating through the adhesive FRP layer and entering the FRP plate The FRP layer has two oblique holes formed side by side at both ends of the adhesive FRP layer and pins inserted into the two oblique holes, respectively. The butt joint of the plate making is used as a means for solving the above-mentioned conventional problems.

  Moreover, the butt joint of the FRP board which concerns on Claim 2 of this invention is two slant holes each formed in the both ends of the surface side adhesion | attachment FRP layer laminated | stacked ranging over each surface of a pair of said FRP board And two oblique holes respectively formed at both end portions of the adhesive FRP layer on the back surface side laminated across the back surfaces of the pair of FRP plates.

  Furthermore, the butt joint of the FRP board which concerns on Claim 3 of this invention is set as the structure by which the said pin is each press-fit with respect to the said 2 oblique holes, The FRP board which concerns on Claim 4 of this invention The butt joint has a configuration in which an adhesive is applied to at least one of the two oblique holes and the pin.

  Furthermore, the butt joint of the FRP plate according to claim 5 of the present invention has a configuration in which an FRP pin is used as the pin.

  On the other hand, the invention according to claim 6 of the present invention is a butt-joining method for FRP plates that butt-joins the end surfaces of a pair of FRP plates, and temporarily joins the end surfaces of a pair of FRP plates. A step of laminating an adhesive FRP layer straddling each surface of the pair of FRP plates in which end faces are temporarily joined to each other and laminating an adhesive FRP layer straddling each back surface; and both ends of the adhesive FRP layer Further, two oblique holes that are inclined in directions opposite to each other with respect to an axis orthogonal to the adhesive FRP layer and penetrate the FRP plate through the adhesive FRP layer are arranged in the width direction of the adhesive FRP layer, respectively. And a step of inserting the pins into the two oblique holes, respectively, and a method for butt-joining the FRP plate having this configuration to solve the conventional problems described above. It is set to.

  In the butt joint and butt joining method of the FRP plate according to the present invention, the adhesive FRP layer is laminated across the respective surfaces of the pair of FRP plates obtained by temporarily joining the end faces, and the adhesive FRP layer is formed across the respective back surfaces. Since they are laminated, the same tensile strength as that of a joint formed by secondary lamination of fiber fabrics or adhesion of a molded FRP plate can be obtained.

  Further, in the butt joint and butt joint method of the FRP plate according to the present invention, the two oblique holes formed side by side in the width direction at both ends of the adhesive FRP layer, that is, orthogonal to the adhesive FRP layer. Pins are respectively inserted into two oblique holes inclined in directions opposite to each other and penetrating through the adhesive FRP layer and entering the FRP plate. Even if force that peels off from the front or back surface is applied to the end of the adhesive FRP layer, the two pins prevent the peeling area from the front or back surface of the FRP plate at the end of the adhesive FRP layer from expanding. As a result, it is possible to avoid the occurrence of a sudden breakage.

  Further, in the butt joint of FRP plates according to claim 2 of the present invention, the drilling man-hours and the pin insertion man-hours can be reduced by the amount that the number of oblique holes to be formed is halved.

  Furthermore, in the FRP plate butt joint according to claim 3 of the present invention, since the pin is press-fitted into the oblique hole, rattling of the pin with respect to the oblique hole is suppressed, and the present invention claims In the FRP plate butt joint according to Item 4, since the adhesive is applied to at least one of the oblique hole and the pin, it is possible to reliably prevent the pin from falling off the oblique hole. Become.

  Furthermore, in the butt joint for FRP plate according to claim 5 of the present invention, since the pins are made of FRP, increase in weight and cost can be suppressed.

  Since the FRP plate butt joint according to claim 1 of the present invention has the above-described configuration, the same tensile strength as a joint formed by secondarily laminating a fiber fabric or bonding a molded FRP plate is obtained. Needless to say, even if an initial breakage due to a shear load occurs, it is possible to prevent abrupt breakage.

It is plane | planar explanatory drawing (a) of the butt joint of the board made from FRP which concerns on one Example of this invention, and sectional explanatory drawing (b) in the AA line position in Fig.1 (a). It is joining explanatory drawing (a)-(c) at the time of carrying out butt | joining joining of FRP board using the butt joint of FIG. In plane explanatory drawing (a) of the butt joint of the FRP sandwich board by other Example of the butt joint of the FRP board which concerns on this invention, and sectional explanatory drawing (b) in the BB line position in Fig.3 (a). is there. Plane explanatory view of the butt joint of the FRP sandwich plate according to still another embodiment of the butt joint of the FRP plate according to the present invention (a) and cross sectional explanatory view at the CC line position in FIG. It is.

Hereinafter, the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of a butt joint for FRP plate according to the present invention. In this embodiment, the case where the FRP plate is a single FRP plate will be described as an example.

  As shown in FIG. 1, the butt joint 1 is a butt joint of FRP plates that butt-joins the end surfaces WE and WE of a pair of FRP plates (FRP plates) W and W. The end surfaces WE and WE Of the pair of FRP plates W, W temporarily bonded with an adhesive between the front surfaces Wf, Wf and between the back surfaces Wb, Wb, respectively, and the adhesive FRP layer 2 Two oblique holes 2a and 2b are formed at both ends with the center line L in the width direction in between, and pins 3 inserted into the oblique holes 2a and 2b, respectively.

  The two oblique holes 2a and 2b are formed so as to incline in directions opposite to each other with respect to an axis orthogonal to the adhesive FRP layer 2 and to penetrate into the FRP plate W through the adhesive FRP layer 2. In this embodiment, the two oblique holes 2a and 2b respectively formed at both end portions of the front surface side adhesive FRP layer 2 penetrate the back surface side adhesive FRP layer 2, and the back surface side adhesive FRP layer. 2 also serves as two oblique holes 2a and 2b formed at both ends.

  In this case, an FRP pin (an FRP pin that has been drawn and formed with the fiber direction aligned with the axial direction) is adopted as the pin 3, and the adhesive is applied to the pin 3 for the two oblique holes 2a and 2b. It is designed to press-fit after applying.

  When the butt joint 1 butt-joins each end face WE, WE of a pair of FRP plates (FRP plates) W, W as shown in FIG. 2 (a), The end faces WE, WE of the pair of FRP plates W, W are temporarily joined with an adhesive, and subsequently, as shown in FIG. 2 (b), the end faces WE, WE are temporarily joined in an adhesive FRP layer laminating step. The adhesive FRP layer 2 is laminated across the front surfaces Wf and Wf of the pair of bonded FRP plates W and W, and the adhesive FRP layer 2 is laminated across the rear surfaces Wb and Wb.

  Next, as shown in FIG. 2C, in the oblique hole forming step, both ends of the adhesive FRP layer 2 laminated on the pair of FRP plates W and W are mutually connected with respect to an axis orthogonal to the adhesive FRP layer 2. Two slant holes 2a and 2b are formed so as to incline in opposite directions and penetrate the front side adhesive FRP layer 2, the FRP plate W and the back side adhesive FRP layer 2, respectively, and then an adhesive is applied to the pin 3 Then, the two end faces WE and WE of the pair of FRP plates W and W are butt-joined and pressed into the two oblique holes 2a and 2b, respectively.

  As described above, in the butt joint 1 of the FRP plate described above, the adhesive FRP layer 2 is laminated across the respective surfaces Wf, Wf of the pair of FRP plates W, W in which the end surfaces WE, WE are temporarily joined to each other. Since the adhesive FRP layer 2 is laminated across the back surfaces Wb and Wb, the same tensile strength as that of a joint formed by secondary lamination of fiber fabric or adhesion of a molded FRP plate can be obtained. Become.

  In the FRP plate butt joint 1 described above, the two oblique holes 2 a and 2 b formed in the width direction at both ends of the adhesive FRP layer 2, that is, orthogonal to the adhesive FRP layer 2. Pins 3 are respectively inserted into two oblique holes 2a and 2b which are inclined in directions opposite to each other and penetrate the front side adhesive FRP layer 2, the FRP plate W and the back side adhesive FRP layer 2. Therefore, even if a force that peels off from the front surface Wf or the back surface Wb of the FRP plate W is applied to the end portion of the adhesive FRP layer 2, the FRP at the end portion of the adhesive FRP layer 2 by the two pins 3 and 3 is used. It is possible to prevent the peeling area from the front surface Wf and the rear surface Wb of the plate W from being enlarged, and therefore a situation in which the plate W is broken rapidly can be avoided.

  Furthermore, in the butt joint 1 of the FRP plate described above, the two oblique holes 2a and 2b respectively formed at both ends of the front surface side adhesive FRP layer 2 penetrate the back surface side adhesive FRP layer 2 and Since the two oblique holes 2a and 2b formed at both ends of the adhesive FRP layer 2 on the side are also used, the drilling man-hours and the pin insertion are as much as the number of the oblique holes 2a and 2b to be formed is halved. The number of work man-hours will be reduced.

  Furthermore, in the FRP plate butt joint 1 described above, the pin 3 is press-fitted into the oblique holes 2a and 2b, so that rattling of the pin 3 with respect to the oblique holes 2a and 2b can be suppressed. In addition, in the butt joint 1 of this FRP plate, since the adhesive is applied to the pin 3 and press-fitted, it is possible to reliably prevent the pin 3 from falling off the oblique holes 2a and 2b. Become.

  Furthermore, in the above-described butt joint 1 made of FRP plate, since the pin 3 is made of FRP, an increase in weight and cost can be suppressed.

  FIG. 3 shows another embodiment of a butt joint for FRP plate according to the present invention. As shown in FIG. 3, this butt joint 11 is an FRP formed by sandwiching a core material WAc between FRP plates WAf and WAb. This is a butt joint of FRP plates that butt-joins the end faces WE, WE of the sandwich plates WA, WA.

  In this embodiment, the two oblique holes 2 a and 2 b are inclined in directions opposite to each other with respect to an axis orthogonal to the adhesive FRP layer 2 at both ends of the front side adhesive FRP layer 2 and penetrate through the adhesive FRP layer 2. Are formed so as to enter the front side FRP plate WAf. On the other hand, at the both ends of the back side adhesive FRP layer 2, the two oblique holes 2a and 2b are formed with respect to the axis perpendicular to the adhesive FRP layer 2. Are formed so as to incline in directions opposite to each other and penetrate through the adhesive FRP layer 2 to the FRP plate WAb on the back side.

  Also in this case, as indicated by phantom lines in FIG. 3, the two oblique holes 2a and 2b respectively formed at both ends of the adhesive FRP layer 2 on the surface side include the FRP plate WAf, the core material WAc, the FRP plate WAb, and You may make it also serve as the two oblique holes 2a and 2b formed in the both ends of the back surface side adhesion FRP layer 2 through the back surface side adhesion FRP layer 2. FIG.

  Thus, also in the butt joint 11 of the FRP plate described above, the adhesive FRP layer 2 is laminated across the respective surfaces Wf, Wf of the pair of FRP sandwich plates WA, WA in which the end faces WE, WE are temporarily joined. In addition, since the adhesive FRP layer 2 is laminated across the respective back surfaces Wb, Wb, the same tensile strength as a joint formed by secondary lamination of fiber fabrics or adhesion of a molded FRP plate can be obtained. It will be.

  Further, in the butt joint 11 made of the FRP plate described above, the pins 3 are respectively inserted into the two oblique holes 2a and 2b formed in the width direction at both ends of the adhesive FRP layer 2, respectively. Therefore, even if a force that peels off from the front surface Wf or the back surface Wb of the FRP sandwich plate WA is applied to the end portion of the adhesive FRP layer 2, the FRP sandwich plate at the end portion of the adhesive FRP layer 2 by the two pins 3, 3 It is possible to prevent the peeling area from the front surface Wf and the back surface Wb of the WA from being enlarged, and thus a situation in which the breakage occurs suddenly can be avoided.

  FIG. 4 shows still another embodiment of the butt joint of the FRP plate according to the present invention. As shown in FIG. 4, the butt joint 21 includes the core material WAc sandwiched between the FRP plates WAf and WAb. This is a butt joint of FRP plates that butt-joins the end faces WE, WE of the FRP sandwich plates WA, WA.

  In this embodiment, slopes Ws and Ws are formed from the front and back surfaces Wf and Wb of the FRP sandwich plate WA to the end surface WE, respectively, and the laminated FRP layer 22 is between the slopes Ws and Ws of the FRP sandwich plates WA and WA. It is laminated on the groove formed.

  Then, at both ends of the laminated FRP layer 22, the two oblique holes 2 a and 2 b are inclined in directions opposite to each other with respect to an axis orthogonal to the laminated FRP layer 22, and penetrate the laminated FRP layer 22 to face the front side. The two inclined holes 2a and 2b are opposite to each other with respect to an axis orthogonal to the laminated FRP layer 22 at both ends of the back side laminated FRP layer 22, respectively. Each of them is formed so as to incline in the direction and penetrate through the laminated FRP layer 22 to enter the FRP plate WAb on the back side.

  Also in this case, as indicated by phantom lines in FIG. 4, the two oblique holes 2 a and 2 b respectively formed at both ends of the surface-side laminated FRP layer 22 include the FRP plate WAf, the core material WAc, the FRP plate WAb, and You may make it serve as the two oblique holes 2a and 2b formed in the both ends of the laminated FRP layer 22 of the back surface through the laminated FRP layer 22 of the back surface side.

  Thus, also in the butt joint 21 of the above-mentioned FRP plate, the laminated FRP layer 22 is straddled across the inclined surfaces Ws, Ws on the front side of the pair of FRP sandwich plates WA, WA in which the end faces WE, WE are temporarily joined. Since the laminated FRP layer 22 is laminated across the slopes Ws and Ws on the back surface side, the same as the joint formed by secondary lamination of the fiber fabric or adhesion of the molded FRP plate. Tensile strength will be obtained.

  In the FRP plate butt joint 21 described above, the pins 3 are respectively inserted into the two oblique holes 2a and 2b formed in the width direction at both ends of the laminated FRP layer 22, respectively. Therefore, even if a force that peels off the inclined surface Ws on the front and back sides of the FRP sandwich plate WA is applied to the end portion of the laminated FRP layer 22, the FRP sandwich plate WA at the end portion of the laminated FRP layer 22 by the two pins 3 and 3 Therefore, it is possible to avoid the occurrence of a sudden breakage.

  The configurations of the butt joint and the butt joining method for FRP plates according to the present invention are not limited to the configurations of the above-described embodiments.

1,11,21 FRP plate butt joint 2 Adhesive FRP layers 2a, 2b Slanted hole 3 Pin 22 Laminated FRP layer W FRP plate (FRP plate)
WA FRP sandwich plate (FRP plate)
WAf, WAb FRP plate WAc Core material WE End surface of FRP plate Wb Back surface of FRP plate Wf Front surface of FRP plate Ws Slope

Claims (6)

A butt joint for FRP plates that butt-joins each end face of a pair of FRP plates,
Adhesive FRP layers laminated across the respective front and back surfaces of the pair of FRP plates temporarily bonded between the end surfaces;
Inclined in directions opposite to each other with respect to an axis orthogonal to the adhesive FRP layer, and formed side by side in the width direction at both ends of the adhesive FRP layer so as to pass through the adhesive FRP layer and enter the FRP plate. Two oblique holes,
A butt joint for FRP plates, comprising pins inserted into the two oblique holes, respectively.   Two oblique holes formed at both ends of the front-side adhesive FRP layer laminated over the respective surfaces of the pair of FRP plates, and the back side laminated over the respective rear surfaces of the pair of FRP plates 2. The butt joint for FRP plate according to claim 1, wherein two oblique holes respectively formed at both ends of the adhesive FRP layer are continuous with each other.   The FRP plate butt joint according to claim 1 or 2, wherein the pins are press-fitted into the two oblique holes, respectively.   The butt joint for FRP plate according to any one of claims 1 to 3, wherein an adhesive is applied to at least one of the two oblique holes and the pin.   The butt joint of the FRP board as described in any one of Claims 1-4 which used the pin made from FRP as the said pin. A butt joining method of FRP plates for butt joining each end face of a pair of FRP plates,
A step of temporarily joining the end faces of the pair of FRP plates;
Laminating an adhesive FRP layer across each surface of the pair of FRP plates temporarily bonded between end faces and laminating an adhesive FRP layer across each back surface;
Two oblique holes that are inclined in directions opposite to each other with respect to an axis orthogonal to the adhesive FRP layer and enter the FRP plate through the adhesive FRP layer are formed at both ends of the adhesive FRP layer. Forming the layers side by side in the width direction of the layers;
A method of butt-joining FRP plates, comprising a step of inserting pins into the two oblique holes, respectively.

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