Building material panel and connecting structure using the same

Abstract

To provide a building material panel with adiabaticity, airtightness, and watertightness allowing its installation to be easily carried out at the site, and a connection structure using the building material panel.SOLUTION: In a building material panel provided with a metallic outer skin material on each of both edges of which in a width direction a respective joint is arranged, and a core material placed and fixed on a rear surface of the outer skin material, for constructing a roof or a wall of a building structure not only by adjacently placing the respective other building materials on both edges of the outer skin material in the width direction to make a joint of the building material opposite to the joint but also by engaging and covering those joints to each other through cover caps, the core material is formed with a core material body placed and fixed on the rear surface of the outer skin material as including a part of the joints, and a frame body having abutment surfaces jointing with a side surface, a tip surface and a rear surface of the core material body and surrounding the core material, and an erected piece erecting at an outer edge end of the joint is arranged.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a building material panel suitable for constructing the roof and outer wall of a building structure, and a connecting structure using the building material panel.

Background Art

[0002] A building material panel having a heat insulating material on the back surface with a metal plate as an outer skin material has advantages of being lightweight, having high strength, and high heat insulation efficiency, and is widely used as a roof material or outer wall material for building structures such as factories, warehouses, single-family houses, apartment houses, commercial facilities such as stores, or livestock houses. As prior art in this regard, for example, Patent Document 1 and Patent Document 2 are referred to.

[0003] By the way, this type of building material panel has the following problems and there is still room for improvement. That is, such a building material panel has a structure in which a cover cap for linking the building material panels is integrally connected to the panel body. Since the linking positions of the panel body and the cover cap are the same, a step is generated at the overlapping portion, making it difficult to fit the cover cap. If an attempt is made to forcefully fit the cover cap, there is also a risk that the heat insulating material will crack at the interface between the cover cap and the heat insulating material. It was difficult to join the building material panels in the longitudinal direction, and the on-site workability was not good.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to propose a building material panel that can be easily constructed on-site while ensuring excellent heat insulation, airtightness, and watertightness, and a connecting structure using the building material panel.

Means for Solving the Problems

[0006] The present invention includes a metal outer skin material provided with joints at both edge portions in the width direction, and a core material disposed and fixed on the back surface of the outer skin material. When other building material panels are adjacently arranged at both edge portions in the width direction of the outer skin material and the adjacent joints of the building material panels are faced with the joints, the joints are interconnected and covered with a cover cap to construct a roof or wall of a building structure. The core material includes a core material body disposed and fixed on the back surface of the outer skin material including a part of the joint, and an abutting surface connected to the side surface, front end surface, and rear end surface of the core material body, and is composed of a frame body surrounding the core material. The joint is a building material panel characterized by having a rising piece rising at its outer edge end.

[0007] In the building material panel having the above-described configuration, the joint has a side wall portion with one end connected to the outer surface of the outer skin material and the other end located below the outer surface of the outer skin material, and a seating surface located below the outer surface of the outer skin material but above the other end of the side wall portion, and having a base formed with the upright piece, and jaws respectively connected to the other end of the side wall portion and one end of the base, directed toward the central portion in the width direction of the outer skin material, and detachably connectable to the engaging piece formed on the cover cap. The joint has a side wall portion with one end connected to the outer surface of the outer skin material and the other end located above the outer surface of the outer skin material, jaws connected to the other end of the side wall portion, directed toward the central portion in the width direction of the outer skin material, and detachably connectable to the engaging piece formed on the cover cap, and a base connected to the proximal end of the jaws and having a seating surface located above the outer surface of the outer skin material and formed with the upright piece. The seating surface is a flat surface. The core material has an inner skin material disposed and fixed on its lower surface and sandwiching the core material under cooperation with the outer skin material. The core material body has at least one recess and / or protrusion at at least one of its side surface, front end surface, and rear end surface. The frame body has protrusions and / or recesses adapted to the recesses and / or protrusions of the core material body. The frame body is made of a heat insulation block. The core material body is made of a foamed plastic-based heat insulating material. The outer skin material has a projecting piece at one end in the longitudinal direction, which is flush with the outer skin material and overlaps the lower joint of another building material panel adjacent to the underwater side. The outer skin material has a lower joint at the other end in the longitudinal direction, which overlaps the projecting piece of another building material panel adjacent to the water upper side via a water-stop packing. The core material has at least one recess extending along the longitudinal direction of the outer skin material on at least one of its upper surface and lower surface, which is preferable as a specific means for solving the problem.

[0008] Further, in manufacturing a building material panel having the above configuration, while arranging the frame body on the back surface of the outer skin material, arranging a reinforcing material along the joint on the front surface of the outer skin material, and applying a backing plate or an inner skin material to the open end formed by the frame body to form an assembled structure having a closed space inside thereof, and then heating and pressurizing the assembled structure and injecting a foamed plastic-based heat insulating material in a liquid state into the closed space to foam it to form a core material body, which is a method for manufacturing a building material panel. In manufacturing a building material panel, it is preferable to stack a plurality of assembled structures, heat and pressurize a group of the stacked assembled structures using a multi-stage press or the like, and inject a foamed plastic-based heat insulating material in a liquid state into the closed space of each assembled structure to foam it. Also, a plurality of such building material panels are prepared, the joints of each building material panel are faced to each other, each building material panel is fixed to a base material, and the joints are interconnected and covered with each other via a cover cap to form a connecting structure using the building material panels.

Effects of the Invention

[0009] According to the present invention, since the core material of the building material panel is composed of a core material body that is disposed and fixed on the back surface of the outer skin material including a part of the joint, and an abutting surface that is connected to the side surface, the front end surface, and the rear end surface of the core material body and surrounds the core material, it is possible to form a heat insulating layer simply by injecting a heat insulating material stock solution into the closed space formed inside the frame body and foaming it, and the building material panel can be efficiently manufactured.

[0010] Further, according to the present invention, since the standing pieces are abutted against each other at the outer edge ends of two adjacent joints, two inner gutters can be formed on the left and right directly below the cover cap. Even if rainwater intrudes from the gap at the mounting part of the cover cap, the intruded rainwater is blocked by the standing pieces and discharged from the eaves through the two inner gutters on the left and right. As a result, the intrusion of rainwater into the joint part of the building material panel is avoided.

Brief Description of the Drawings

[0011]

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Embodiments for Carrying Out the Invention

[0012] Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 is an external perspective view schematically showing an embodiment of a building material panel according to the present invention, and FIG. 2 is an exploded perspective view of the building material panel shown in FIG. 1. Further, FIG. 3(a) is a front view of the building material panel shown in FIG. 1, FIG. 3(b) is a rear view of the building material panel shown in FIG. 1, FIG. 4 is a plan view of the building material panel shown in FIG. 3, FIG. 5 is a bottom view of the building material panel shown in FIG. 3, FIG. 6 is a right side view of the building material panel shown in FIG. 3, FIG. 7 is a view showing a state where the inner skin material is removed in FIG. 5, and FIG. 8 is a view showing the A-A cross section of FIG. 4. Furthermore, FIG. 9 is a view showing the assembly situation in the general part of the constituent members constituting the building material panel in a cross section in the width direction, FIG. 10 is a view showing the connection state of the general part of the building material panel in a cross section in the width direction, FIG. 11 is an explanatory view of the joining method in the longitudinal direction of the building material panel according to the present invention, FIG. 12 is a view showing the assembly situation in the longitudinal direction joining of the building material panel in a cross section in the width direction, and FIG. 13 is a view showing the connection state in the longitudinal direction joining of the building material panel in a cross section in the width direction.

[0013] In constructing the roof and walls of a building structure, it is premised that a plurality of building material panels having the same configuration as the building material panel according to the present invention are used. Also, the width dimension, length, and thickness of the building material panel can be arbitrarily changed and are not limited to the building material panel having the aspect ratio as shown. As the joining procedure of the building material panels, a vertical joining (vertical roofing) method can be adopted in which the longitudinal joining of the building material panels is performed first, and after the longitudinal joining is completed, the widthwise joining is performed. However, a horizontal joining (horizontal roofing) method may be adopted in which the widthwise joining of the building material panels is performed first, and after the widthwise joining is completed, the longitudinal joining is performed.

[0014] Reference numeral 1 in FIGS. 1 to 13 is a metal outer skin material that forms the basic framework of the building material panel according to the present invention. The outer skin material 1 is surrounded by a pair of short sides and a pair of long sides that sandwich the pair of short sides from both sides, and has a rectangular contour in plan view. Its upper surface is a flat surface so that a flat roof or wall can be constructed. Hereinafter, the direction along the short side is referred to as the width direction of the outer skin material 1, and the direction along the long side is referred to as the longitudinal direction of the outer skin material 1.

[0015] In addition, reference numeral 2 in FIGS. 1 to 13 is a joint provided at both edge portions in the width direction of the outer skin material 1, 3 is a core material disposed and fixed on the back surface of the outer skin material 1, and 4 is disposed and fixed on the lower surface of the core material 3, and is an inner skin material that sandwiches the core material 3 in cooperation with the outer skin material 1. The inner skin material 4 can also be omitted.

[0016] The outer skin material 1 (including the joint 2) and the inner skin material 4 are both made of a galvanized steel sheet, an aluminum-zinc alloy plated sheet, a stainless steel sheet, an aluminum sheet, a copper sheet, or a painted or coated metal sheet thereof, having a thickness of about 0.2 to 1.0 mm, more preferably about 0.4 mm, and are formed by subjecting a single plate material to a forming process such as roll forming. In addition to the above members, paper, plastic, metal foils such as iron, copper, and aluminum, metal films, etc. can also be used as the inner skin material 4.

[0017] One end of the joint 2 is connected to the outer surface of the outer skin material 1, and the other end is a side wall portion (inclined wall) 2a located below the outer surface of the outer skin material 1. It has a seating surface 2b1 that is located below the outer surface of the outer skin material 1 but above the other end of the side wall portion 2a. A base 2b for placing and fixing a clip K for connecting building material panels is provided. The other end of the side wall portion 2a and one end of the base 2b are respectively connected and directed toward the central portion in the width direction of the outer skin material 1, and a jaw portion 2c that can be detachably connected to a connecting piece C2 formed on the cap body C1 of the cover cap C is applied.

[0018] When the cover cap C is attached, the top surface 2c1 of the jaw part 2c is preferably set to be slightly lower than the outer surface of the outer skin material 1 so as to be flush with the outer surface of the outer skin material 1. Further, from the viewpoint of functioning the base 2b as a seating surface 2b1 for screwing in screws for fixing the building material panel to the base material, it is preferable that the base 2b is formed as a flat surface (horizontal plane).

[0019] By forming a groove part 2d having, for example, a V-shaped cross-sectional shape by the rising wall 2c2 of the jaw part 2c and the side wall part 2a, it becomes possible to increase the distance L (see FIG. 10) from the bottom of the groove part 2d to the attachment position of the cover cap C, and there is an advantage that the intrusion of rainwater into the cover cap C can be suppressed.

[0020] The core material 3 includes a core material body 3a that is disposed and fixed to the back surface of the outer skin material 1 including a part of the region of the joint 2, and has a contact surface that connects to the side surface, the front end surface, and the rear end surface of the core material body 3a, and is composed of a frame body 3b that surrounds the core material body 3a. Although the frame body 3b is shown as individual members located on the side surface, the front end surface, and the rear end surface of the core material body 3a, the frame body 3b may be an integral body. Among the frame bodies 3b, the frame bodies 3b disposed on the front end surface and the rear end surface of the core material body 3a are provided with filling pieces 3b' that are pre-attached to the back grooves of the outer skin material 1 during the manufacture of the building material panel.

[0021] As the core material body 3a of the core material 3, in order to ensure high heat insulation and high airtightness, a heat insulating material made of foamed plastic having a thickness of about 75 to 150 mm, more preferably about 100 mm, can be used. As the foamed plastic-based heat insulating material, it is preferable to apply polyisocyanurate or the like that enables injection foaming.

[0022] The frame body 3b and the filling member 3b' basically use a heat insulating material made of the above-described material. The frame body 3b and the filling member 3b' use heat insulating blocks pre-formed into a predetermined shape and thickness. By configuring the frame body 3b, the filling member 3b' and the core material body 3a with the same material, the adhesion strength between the two members can be increased. Although it is also possible to pre-connect the frame body 3b, the filling member 3b' and the outer skin material 1 via an adhesive, if the accurate positioning of the frame body 3b and the filling member 3b' with respect to the outer skin material 1 is possible, the connection by the adhesive may be omitted. An opening 3b1 for injecting the heat insulating material stock solution, an opening 3b2 for venting air, and a check valve 3b3 are provided in the frame body 3b located at the rear end surface of the core material body 3.

[0023] In addition, reference numeral 5 in FIGS. 1 to 13 is an upright piece provided at the other end of the base 2b and forming the end of the joint 2. This upright piece 5 blocks the intrusion of rainwater into the joint portion of the building materials panel and is used when joining the building materials panels together. By forming a gutter inside by the base 2b and the side wall of the jaw portion 2c, even if rainwater intrudes into the cover cap C, the rainwater that has intruded through this gutter can be quickly discharged toward the eaves side or the ground surface. Although not shown, a folded piece folded inward may be provided at the upper end portion of the upright piece 5.

[0024] In addition, reference numeral 6 in FIGS. 1 to 13 is a projecting piece that is integrally connected to one end of the outer skin material 1 in the longitudinal direction of the outer skin material 1 in a flush state. This projecting piece 6 has the same shape as the joint 2 (including the standing piece 5), has an extension part 6a connected to the joint 2, and is overlapped with the lower joint of another building material panel adjacent to the underwater side (since the outer skin material 1 and the projecting piece 6 are connected in a flush state, the boundary therebetween is indicated by a dotted line for convenience). Further, reference numeral 7 is a lower joint that forms a stepped-down area (stepped down by about the thickness of the outer skin material 1) at the other end of the outer skin material 1 in the longitudinal direction and is integrally provided on the outer skin material 1, and is overlapped with the projecting piece 6 of another building material panel adjacent to the water upper side. The lower joint 7 basically also consists of an extension part having substantially the same shape as the joint 2 (including the standing piece 5), but the convex part 7a corresponding to the jaw part 2c has a smaller size than the jaw part 2c in order to facilitate the longitudinal connection of the building material panels.

[0025] As shown in FIGS. 14(a) to 14(f), the building material panel according to the present invention arranges and fixes a frame body 3b that functions as a foam blocking member on the back surface of the outer skin material 1, and arranges pressing members h1, h2 along the joint 2 and a pressing member h3 along the lower joint 7 on the surface of the outer skin material 1 to prevent deformation due to the foaming internal pressure, and arranges a pressing member h4 on the lower surface of the projecting piece 6. Then, after constructing an assembled structure in which a closed space M is formed inside by applying a backing plate or an inner skin material 4 to the open end formed by the frame body 3b, the assembled structure is heated and pressurized, and a foamed plastic-based heat insulating material is injected in a liquid state into the closed space M of the assembled structure while performing air replacement through the opening 3b1 to form the core material main body 3a by foaming. Thereby, there is no need for a complicated process of molding the heat insulating material according to the shape of the outer skin material, attaching the heat insulating material related to the molding process to the outer skin material, assembling the molding die on the back surface of the outer skin material, and injecting and foaming the heat insulating material stock solution into the cavity of the molding die, and the building material panel can be efficiently manufactured.

[0026] The assembled structure may be formed by laminating a plurality of them, heating and pressing a group of the laminated assembled structures using a multi-stage press or the like, and injecting a foamed plastic-based heat insulating material in a liquid state into the closed space M of each assembled structure to cause it to foam. According to this, more efficient production of building panels becomes possible. As the heating and pressing conditions of the assembled structure, in the case of polyisocyanurate, it is preferable to hold at a temperature of 60 °C for about 30 minutes. Further, when laminating the assembled structures, they are laminated while maintaining the surface of the outer skin material 1 in a horizontal posture facing upward.

[0027] In order to construct a connecting structure such as a roof or a wall of a building structure using the building panel according to the present invention, other building panels are respectively adjacently arranged at both edge portions in the width direction of the outer skin material 1, and the adjacent joint 2 and the joint 2 are faced to each other (see FIG. 9). Then, the standing pieces 5 are sandwiched between clips K to join the two building panels together, and after driving a screw into the base 2b through the clip K to fix the building panel to a rafter or the like, the joints 2 are linked to the linking piece C2 provided on the cap body C1 of the cover cap C, and the joints 2 may be covered with the cover cap C (see FIG. 10). The joining of the building panel with other building panels on the underwater side and the water upper side is preferably performed prior to the joining in the width direction of the building panel. Specifically, it is performed by overlapping the protruding piece 6 of the building panel arranged on the water upper side on the lower joint 7 of the building panel located on the underwater side (see FIGS. 12 and 13). In addition, when overlapping the lower joint 7 and the protruding piece 6, a packing S for water stop can be provided between them as shown in FIG. 11.

[0028] When fixing the building panel to a rafter T or the like via a roofing L and a sheathing board N, from the viewpoint of suppressing the occurrence of condensation caused by the through-hole formed by driving the screw, as shown in FIGS. 10 and 13, the screw is preferably driven at either one of the bases 2b of the joint 2. Further, an airtight packing P such as EPDM sponge rubber can be arranged between the joint 2 and the facing between the adjacent joints 2 of the other adjacent building panels from the viewpoints of improving airtightness and preventing the occurrence of heat insulation defects.

[0029] FIG. 15 is a diagram showing an external perspective view of the cover cap C. The cover cap C includes a cap body C1 that is located on the upper surface of the joint 2 and the adjacent joint 2 of another building material panel arranged adjacent to the joint 2 and covers the joint 2 and the adjacent joint 2, and is integrally connected to both ends in the width direction of the cap body C1 in a cantilever state and can be attached with one touch by elastic deformation with springback. And a connecting piece C2, and a joint C3 that is connected to the end of the cap body C1 and connects the cover caps C to each other can be used. Note that the cover cap C may use other things than those shown in the drawings.

[0030] Further, FIGS. 16(a) to (e) are diagrams specifically showing the configuration of the clip K. As the clip K, a double clip type clip body K1 that can sandwich two standing pieces 5 by elastic deformation with springback, and a tongue piece K2 that has rising blades at the ends in the width direction and is connected to the lower end of the clip body K1 in a cantilever state. A hat-shaped clip can be used. The clip K also has a function as a hanger that keeps the attachment posture of the cover cap C constant, and a plurality of clips K are arranged along the longitudinal direction of the building material panel, for example, at a pitch of 400 to 600 mm.

[0031] Figs. 17(a) to (d) are diagrams schematically showing the assembly state of the cover cap C when four building materials panels according to the present invention are joined vertically and horizontally. Basically, the cover cap C overlaps and joins the underwater end of the cover cap C disposed on the water upper side on the joint C3 located at the upper end of the cover cap C on the water. It is preferable that the joining portion of the cover cap C is shifted so as to be at a position different from the joining portion of the building material panel. When the cover cap C having such a configuration is applied, the width of the cover cap C in the general part is W1 as shown in Fig. 10, but at the connection part where the spring-out piece 6 and the lower joint 7 overlap, the cover cap C strongly contacts, and its width is widened from W1 to W2 (W2 > W1) as shown in Fig. 13, and the sliding resistance increases, so that the cover cap C can be surely fixed to the building material panel without separately providing fixing means.

[0032] In order to construct the roof of a building structure using the building material panel according to the present invention, the lower joint 7 is arranged on the water upper side so that the spring-out piece 6 is on the underwater side. Further, in order to construct the wall of a building structure, the lower joint 7 is arranged facing the eaves side so that the spring-out piece 6 is on the foundation side.

[0033] When constructing the roof, it is preferable to use a building material panel arranged at the eaves tip with the protruding length of the spring-out piece 6 shortened. Further, when constructing the wall, it is preferable to use a building material panel arranged on the most foundation side with the protruding length of the spring-out piece 6 shortened.

[0034] Fig. 18 is a diagram showing another embodiment of the building material panel according to the present invention. The core material body 3a can be provided with at least one recess and / or protrusion 3a1 on its side surface, front end surface, and rear end surface, and the frame body 3b can be provided with protrusions and / or recesses 3b3 that fit into the recesses and / or protrusions 3a1 of the core material body 3a to enable the mutual connection of the core material body 3a and the frame body 3b. Thereby, the connection strength between the core material body 3a and the frame body 3b is further increased.

[0035] FIG. 19 is a view showing still another example of the building material panel according to the present invention, in which the inner skin material 4 is omitted and a recess 8 extending along the longitudinal direction of the outer skin material 1 is provided on the upper surface of the core material body 3a of the core material 3, and the portion is used as an air layer.

[0036] In such a building material panel, when a moisture-permeable roofing L is disposed on the field board N and the core material 3 is made of a member having high moisture permeability, moisture that has passed through the core material 3 can be discharged to the outside of the building structure through the recess 8, and decay of the base material of the wall or roof due to dew condensation can be avoided. The recess 8 can be formed by using a heat insulating block having a shape as shown by the broken line in FIG. 19.

[0037] FIG. 20 is a view showing still another example of the building material panel according to the present invention, in which a recess 9 extending along the longitudinal direction of the outer skin material 1 is provided on the lower surface of the core material body 3a of the core material 3.

[0038] Such a building material panel is a building material panel suitable for repairing existing roofs and walls. By storing projections (such as tile battens) provided on the existing walls and roofs in the recess 9 and fixing the building material panel to the existing roofs and walls, it is possible to repair them into new roofs and walls having high heat insulation properties.

[0039] FIGS. 21 and 22 are views showing modified examples of the building material panel according to the present invention. The building material panels shown in FIGS. 21 and 22 have a structure in which the outer upper surface of the outer skin material 1 is connected in a straight line to the lower end of the side wall portion 2a of the joint 2, that is, one end of the joint 2 is connected to the outer surface of the outer skin material 1 and the other end is located above the outer surface of the outer skin material 1. The side wall portion 2a, the other end of the side wall portion 2a, a jaw portion 2c that is connected to the other end of the side wall portion 2a and is detachably connectable to a linking piece C2 formed on the cover cap C and is directed toward the central portion in the width direction of the outer skin material 1, and a base 2b formed with a seating surface and a standing piece 5 that are connected to the base end of the jaw portion 2c and are located above the outer surface of the outer skin material 1.

[0040] Such a building material panel can also efficiently manufacture the building material panel while ensuring good heat insulation, airtightness, and workability, similar to the building material panel shown in FIG. 1 above.

[0041] In particular, in the building material panel shown in FIG. 22, where the convex portion 10 is provided at the center in the width direction of the outer skin material 1, it contributes to improving the aesthetic appearance of the connection structure of the roof, wall, etc.

[0042] As the building material panel according to the present invention, a symmetrical type of building material panel having a shape symmetrical about the width direction is shown as an example, but a building material panel having an asymmetrical shape may also be used and is not limited to the illustrated shape.

Industrial Applicability

[0043] According to the present invention, it is possible to provide a building material panel capable of efficient construction while ensuring excellent heat insulation and airtightness, and a connection structure using such a building material panel.

Explanation of Reference Numerals

[0044] 1 Outer skin material 2 Joint, adjacent joint 2a Side wall portion 2b Base 2b1 Seating surface 2c Jaw portion 2c1 Top surface 2c2 Upright wall 2d Groove portion 3 Core material 3a Core material body 3a1 Concave portion, convex portion 3b Frame body 3b′ Filling piece 3b1 Opening 3b2 Opening 3b3 Check valve 3b4 Convex portion and / or concave portion 4 Inner skin material 5 Upright piece 6 Protruding piece 6a Extension portion 7 Lower joint 7a Convex portion 8 recesses 9 recesses 10 protrusions C Cover cap C1 Cap body C2 Connecting piece C3 Joint K Clip K1 Clip body K2 Tongue piece M Closed space h1 Pressing member h2 Pressing member h3 Pressing member h4 Pressing member S Sealing packing P Airtight packing L Roofing N Subfloor T Rafter

Claims

1. A building material panel for constructing a roof or wall of a building structure, comprising a metal outer skin material provided with joints at both edge portions in the width direction, and a core material disposed and fixed on the back surface of the outer skin material, wherein other building material panels are adjacently disposed at both edge portions in the width direction of the outer skin material, the adjacent joints of the building material panels are faced with the joints, and the joints are interconnected and covered with each other via a cover cap. The core material includes a core body disposed and fixed on the back surface of the outer skin material including a part of the joint, and a frame body having a contact surface connected to the side surface, the front end surface, and the rear end surface of the core body and surrounding the core material. The building material panel is characterized in that the joint has a standing piece rising at its outer edge end.

2. The joint according to claim 1, wherein one end is connected to the outer surface of the outer skin material, the other end is a side wall portion located below the outer surface of the outer skin material, and a seat surface located below the outer surface of the outer skin material but above the other end of the side wall portion, and a base formed with the standing piece, and jaws respectively connected to the other end of the side wall portion and one end of the base, directed toward the central portion in the width direction of the outer skin material, and detachably connectable to a connecting piece formed on the cover cap.

3. The joint according to claim 1, wherein one end is connected to the outer surface of the outer skin material, the other end is a side wall portion located above the outer surface of the outer skin material, a jaw connected to the other end of the side wall portion, directed toward the central portion in the width direction of the outer skin material, and detachably connectable to a connecting piece formed on the cover cap, a seat surface connected to the base end of the jaw and located above the outer surface of the outer skin material, and a base formed with the standing piece.

4. The building material panel according to claim 2 or 3, wherein the seat surface is a flat surface.

5. The building material panel according to any one of claims 1 to 3, wherein the core material has an inner skin material disposed and fixed on its lower surface and sandwiching the core material under the cooperation with the outer skin material.

6. The core material body has at least one recess and / or protrusion at at least one of its side surface, front end surface, and rear end surface, and the frame body has a protrusion and / or recess that conforms to the recess and / or protrusion of the core material body. The building material panel according to any one of claims 1 to 3, characterized in that.

7. The frame body is made of a heat insulation block, and the core material body is made of a foamed plastic-based heat insulation material. The building material panel according to any one of claims 1 to 3, characterized in that.

8. The outer skin material has a projecting piece at one end in the longitudinal direction, which is flush with the outer skin material and overlaps with the lower joint of another building material panel adjacent to the underwater side. At the other end in the longitudinal direction of the outer skin material, it has a lower joint that overlaps with the projecting piece of another building material panel adjacent to the upper water side via a packing for water stop. The building material panel according to any one of claims 1 to 3, characterized in that.

9. The core material has one or more recesses extending along the longitudinal direction of the outer skin material on at least one of its upper surface and lower surface. The building material panel according to any one of claims 1 to 3, characterized in that.

10. A plurality of the building material panels according to any one of claims 1 to 3 are prepared, the joints of each building material panel are faced to each other, each building material panel is fixed to the base material, and the joints are interconnected and covered via a cover cap. A connecting structure using the building material panel, characterized in that.

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