Joining structure of building material panels

Abstract

To provide a building material panel and a joint structure thereof which improve a water cutoff effect more than the conventional one.SOLUTION: A first joining end part 30 has a first projection part 31 and a second projection part 32 which are arranged at an interval in the panel thickness direction and project in the joining direction on the side of a second joining end part 40, and a first groove part 33 between the first projection part 31 and the second projection part 32. The second joining end part 40 has a second groove part 42 to which the first projection part 31 is fitted, a third groove part 43 to which the second projection part 32 is fitted, a third projection part 44 to be fitted to the first groove part 33, a first cover part 45 covering the first projection part 31 and continued to the surface of a panel 1, and a second cover part 46 covering the second projection part 32 and continued to the rear surface of the panel 1. The first projection part 31 and the second projection part 32 are arranged so as to be shifted from each other in the joining direction, and the projection length of the second projection part 32 is longer than the projection length of the first projection part 31.SELECTED DRAWING: Figure 4

Description

【Technical Field】 【0001】 The present invention relates to a joining structure for building materials panels. Ru 【Background Art】 【0002】 When constructing roofs, outer walls, etc. of factories, warehouses, etc., it may be possible to simply construct by joining a plurality of panels. For example, a metal sandwich panel in which a heat insulating core material is sandwiched between a pair of metal plates has excellent airtightness and heat insulating function, and good workability. 【0003】 As a structure for joining such panels, a form in which a convex portion formed at the joining end portion on the other end side is fitted into a groove-shaped concave portion formed at the joining end portion on one end side is known (Patent Document 1, etc.). In general, a method of embedding a water stop material made of a modified silicone material or the like at the boundary of the joining portion is adopted. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2010-168820 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 According to the conventional joining structure of panels, for example, in the case of strong wind and rain, there is a risk that rainwater may penetrate into the joints of the panels and reach the inner space, and there is room for improvement. The present invention has been made in view of the above circumstances, and its main object is to provide a joining structure for building materials panels with an improved water stop effect compared to the prior art. Ru 【Means for Solving the Problems】 【0006】 ​​(1) The joining structure for building material panels of the present invention is a joining structure for joining building material panels, which have a sandwich structure in which a core material is sandwiched between two facing materials, by fitting a first joining end provided at one end of the building material panel with a second joining end provided at the other end of an adjacent building material panel, wherein the first joining end is spaced apart in the panel thickness direction and has a first protrusion and a second protrusion that project in the joining direction which is the side of the second joining end, and a first groove between the first protrusion and the second protrusion, and the second The joint end has a second groove into which the first projection fits, a third groove into which the second projection fits, a third projection into which the first groove fits, a first cover portion that covers the first projection and is continuous with one surface of the building material panel, and a second cover portion that covers the second projection and is continuous with the other surface of the building material panel, wherein the first projection and the second projection are offset from each other in the joining direction, and the projection length of the second projection is longer than the projection length of the first projection. 【0007】 (2) In the joining structure of the building material panel of the present invention, the first cover portion and the second cover portion are arranged offset from each other in the joining direction, and a portion of each overlaps with each other in the panel thickness direction. 【0008】 (3) In the building material panel of the present invention, it is preferable that the length along the joining direction from the tip of the first cover portion to the tip of the first protruding portion is 20 mm or more and 40 mm or less. 【0009】 (4) In the joint structure of the building material panel of the present invention, it is preferable that the length along the joint direction from the bottom of the first groove to the tip of the second protrusion is 20 mm or more and 40 mm or less. 【0010】 (5) In the joint structure of the building material panel of the present invention, it is preferable that a water-stopping material is placed at least one of the three locations between the tip of the first protrusion and the bottom of the second groove, between the tip of the second protrusion and the bottom of the third groove, and between the tip of the third protrusion and the bottom of the first groove. 【0011】 (6) In the joint structure for building material panels of the present invention, a screw member with a head is provided that penetrates from one side of the first joint end in the panel thickness direction and fixes the building material panel to a fixing member, wherein the head of the screw member with a head is in contact with one side of the surface material and is covered by the first cover portion, and the head arrangement region on the surface material where the head is arranged is preferably flat. [Effects of the Invention] 【0013】 According to the present invention, a building material panel is provided that has an improved water-stopping effect compared to conventional materials. Ru A joint structure can be provided. [Brief explanation of the drawing] 【0014】 [Figure 1] This is a partial perspective view showing a schematic exterior wall to which the joining structure of building material panels according to one embodiment of the present invention is applied. [Figure 2] This is a longitudinal cross-sectional view of a building material panel according to one embodiment. [Figure 3] This is a longitudinal cross-sectional view showing the upper and lower joint ends of a building material panel according to one embodiment. [Figure 4] This is a longitudinal cross-sectional view showing the joining structure of a building material panel according to one embodiment. [Modes for carrying out the invention] 【0015】 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figure 1 shows a portion of an exterior wall 5 constructed by joining multiple building material panels (hereinafter simply referred to as panels) 1 according to one embodiment. Panel 1 has a rectangular shape. Panel 1 is installed horizontally with its longitudinal direction aligned horizontally. Figure 2 shows a cross-section of Panel 1 along the vertical direction when installed as an exterior wall 5. Figure 3 is a vertical cross-sectional view showing the upper and lower joining ends 30 and 40 of a pair of panels 1 joined vertically. Figure 4 is a vertical cross-sectional view showing the state in which the joining ends 30 and 40 are joined together. Figures 1 to 4 show the outdoor X side and the indoor Y side of the exterior wall 5, respectively. 【0016】 As shown in Figure 2, Panel 1 is a metal sandwich panel in which a core material 13 of a predetermined thickness is sandwiched between a front side material 11 and a back side material 12, both made of thin metal sheets. The front side material 11 and the back side material 12 are bonded to both sides of the core material 13 with adhesive. The adhesive is selected according to the materials of the front side material 11, the back side material 12, and the core material 13, and for example, resin-based adhesives such as urethane adhesives and epoxy adhesives are used. Panel 1 is positioned with the front side material 11 on the outdoor X side and the back side material 12 on the indoor Y side. Hereinafter, the outdoor X side may be referred to as the front side and the indoor Y side as the back side. 【0017】 The materials of the front side material 11 and the back side material 12 are not limited, but for example, various color steel sheets, fluoropolymer steel sheets, PVC steel sheets, galvalume steel sheets (registered trademark), stainless steel sheets such as SUS, etc., and thin sheets with elasticity having a thickness of, for example, 0.35 to 1.2 mm are used. For the core material 13, for example, a lightweight resin foam material such as polystyrene is used, but the material is not limited thereto. In this case, the core material 13 is pre-molded, and the molded product is placed between the front materials 11 and 12 and bonded to the inner surfaces of these front materials 11 and 12. 【0018】 The overall dimensions of panel 1 are arbitrary and should correspond to the exterior wall 5 to which it is installed. For example, the dimensions in the longitudinal direction (horizontal direction on the exterior wall 5) are approximately 900 to 13000 mm, the dimensions in the transverse direction (vertical direction on the exterior wall 5) are approximately 400 to 1200 mm, and the thickness is approximately 25 to 300 mm. 【0019】 The joining end portions 30, 40 of the panel 1 are, that is, the upper first joining end portion 30 and the lower second joining end portion 40. 【0020】 As shown in FIG. 3, the first joining end portion 30 has a first protrusion 31, a second protrusion 32, and a first groove portion 33 between the first protrusion 31 and the second protrusion 32. The first protrusion 31 and the second protrusion 32 are ridges extending along the longitudinal direction of the first joining end portion 30 (the front-back direction of the paper surface in FIG. 3). The first protrusion 31 and the second protrusion 32 are arranged at intervals in the panel thickness direction (the left-right direction in FIG. 3). The first protrusion 31 is arranged on the front side (outdoor X side) of the panel thickness center portion, and the second protrusion 32 is arranged on the back side (indoor Y side) of the panel 1 thickness center portion. The first protrusion 31 and the second protrusion 32 both protrude upward, that is, in the joining direction on the side of the second joining end portion 40. 【0021】 On the front surface of the first joining end portion 30, a front side stepped portion 39 for reducing the thickness is formed. The front side stepped portion 39 is formed by a front side inclined surface 39a that inclines inward, that is, toward the panel thickness center portion as it goes in the joining direction, and a front side flat surface (head arrangement region) 39b that extends from the front side inclined surface 39a in the joining direction and is continuous with the first protrusion 31. The surface of the front side stepped portion 39 is formed by the front side facing material 11. The front side facing material 11 forming the front side flat surface 39b covers the core material 13. 【0022】 The first protrusion 31 continuous with the front side flat surface 39b is formed by the front side facing material 11 extending in the joining direction and then bending inward and being folded back 180° to the opposite side of the joining direction. Further, the front side facing material 11 extends inward from the first protrusion 31 and covers the end surface of the core material 13. The first protrusion 31 is formed by the front side facing material 11 that overlaps doubly. The bottom 33a of the first groove portion 33 is formed by the end portion of the front side facing material 11. 【0023】 A back-side stepped portion 34 is formed on the back surface of the first joint end portion 30 to reduce its thickness. The back-side stepped portion 34 is formed by a back-side inclined surface 34a that slopes inward as it approaches the joint direction, and a second projection 32 that is connected to the back-side inclined surface 34a. The back surface of the back-side stepped portion 34 is formed by the back-side material 12. 【0024】 The second projection 32 is formed by a back side material 12 that extends in the joining direction in a continuous manner with the back inclined surface 34a and then bends inward at a 90° angle, and a core material 13 that is covered by this back side material 12. The inner surface 30c of the core material 13 of the second projection 32 is exposed. 【0025】 The first protrusion 31 and the second protrusion 32 are positioned offset from each other in the joining direction. Furthermore, in terms of the length of protrusion in the joining direction, the length of the second protrusion 32 protruding in the joining direction is longer than the length of the first protrusion 31. In addition, in terms of thickness, the thickness of the second protrusion 32 is greater than the thickness of the first protrusion 31. 【0026】 As shown in Figure 3, the second joint end 40 has a structure that interlocks with the first joint end 30. Specifically, the second joint end 40 has a second groove 42 into which the first projection 31 fits, a third groove 43 into which the second projection 32 fits, and a third projection 44 that fits into the first groove 33. Furthermore, the second joint end 40 has a first cover portion 45 on the front side and a second cover portion 46 on the back side. The third projection 44, the first cover portion 45, and the second cover portion 46 are convex ridges that extend along the longitudinal direction of the second joint end 40 (the front-back direction of the paper in Figure 3). 【0027】 The second groove 42 is formed between the first cover portion 45 and the third projection 44. At the second joint end 40, the front surface material 11 extends a predetermined length in the joining direction toward the first joint end 30, then bends inward, and is further folded back by 180° to form the first cover portion 45. The front surface material 11 forming the first cover portion 45 continuously forms the second groove 42 and the third projection 44. The bottom 42a of the second groove 42 is formed by the front surface material 11. The third projection 44 is formed by extending the front surface material 11 from the bottom 42a of the second groove 42 in the joining direction and then folding it back by 180°. A tapered surface 44a is formed on the front side of the third projection 44. The first cover portion 45 is continuous with the surface of the panel 1. 【0028】 At the second joint end 40, the back side material 12 extends a predetermined length in the joining direction, then bends inward, and is further folded back by 180° to form the second cover portion 46. A bulge 46a is formed on the inner tip of the second cover portion 46. The third groove portion 43 is located between the second cover portion 46 and the third protrusion 44. The third groove portion 43 is formed surrounded by the second cover portion 46 and the exposed inner surface 30d of the core material 13, and its bottom portion 43a is mainly formed of the back side material 12. The second cover portion 46 is continuous with the back surface of the panel 1. 【0029】 The second groove 42 and the third groove 43 are offset from each other in the joining direction, with the third groove 43 positioned above the second groove 42. Similarly, the first cover portion 45 and the second cover portion 46 are offset from each other in the joining direction, with the second cover portion 46 positioned above the first cover. Although the first cover portion 45 and the second cover portion 46 are offset from each other in the joining direction, parts of each, namely the upper part of the first cover portion 45 and the lower tip of the second cover portion 46, overlap each other in the panel thickness direction. 【0030】 Figure 4 shows the state in which the first joint end 30 and the second joint end 40 are joined to each other. As shown in Figure 4, the exterior wall 5 shown in Figure 1 is constructed by first fixing the upper joint end 30 of the upright panel 1 to the horizontal furring strip (fixing member) 55 with a screw member 50 such as a tapping screw, and then fitting the lower second joint end 40 of the panel 1 to be installed above into this joint end 30. By repeating this construction and assembling multiple panels 1 upwards, the exterior wall 5 is constructed. 【0031】 The screw member 50 is fastened by screwing it into the horizontal furring strip 55, passing through the first joint end 30 to the back side from the front side stepped portion 39. The head 50a of the screw member 50 is fastened using the front side flat surface 39b of the front side stepped portion 39 as the seating surface. Compared to a configuration in which the seating surface is the bottom of a recess, fastening the screw member 50 with its head 50a positioned on the front side flat surface 39b in this way reduces the processing effort required for the front side material 11, thereby improving productivity and reducing costs. 【0032】 With the first joint end 30 and the second joint end 40 joined, the first projection 31 of the first joint end 30 fits into the second groove 42 of the second joint end 40, and the third projection 44 of the second joint end 40 fits into the first groove 33 of the first joint end 30. When fitting in this way, the tapered surface 44a of the third projection 44 of the second joint end 40 elastically contacts the tip of the first projection 31 as they fit together. As a result, in the fitted state, the third projection 44 elastically contacts and adheres tightly to the inner surface of the first projection 31, creating an engaged state. The first cover portion 45 of the second joint end 40 fits into the front step portion 39 of the first joint end 30. This first cover portion 45 covers the first projection 31 and the head 50a of the screw member 50. As a result, the head 50a of the screw member 50 is not exposed, and the appearance from the outdoor X side is flat. 【0033】 Furthermore, with the first joint end 30 and the second joint end 40 joined, the second projection 32 of the first joint end 30 fits into the third groove 43 of the second joint end 40. When fitting in this manner, the bulge 46a of the second cover portion 46 elastically slides against the surface of the back step portion 34, fits into the back step portion 34, and comes into contact with the back inclined surface 34a. As a result, the second cover portion 46 elastically contacts and adheres tightly to the base portion of the second projection 32, becoming engaged. 【0034】 In this embodiment, a first water-sealing material 61 is placed between the tip of the first protrusion 31 and the bottom 42a of the second groove 42. A second water-sealing material 62 is placed between the tip of the second protrusion 32 and the bottom 43a of the third groove 43. The water-sealing materials 61 and 62 fill the gaps to ensure watertightness and airtightness, and commonly known materials such as silicone-based sealants or butyl rubber are used. A water-sealing material may also be placed between the tip of the third protrusion 44 and the bottom 33a of the first groove 33. 【0035】 As shown in Figure 6, when the first joint end 30 and the second joint end 40 are joined together, it is preferable that the length L1 along the joining direction from the tip 45b of the first cover portion 45 to the tip 31b of the first protrusion 31 is 20 mm or more and 40 mm or less. It is also preferable that the length L2 along the joining direction from the bottom 33a of the first groove portion 33 to the tip 32b of the second protrusion 32 is 20 mm or more and 40 mm or less. 【0036】 In this embodiment, when rainwater penetrates the horizontally extending joint between the first joint end 30 and the second joint end 40 from the outdoor X side, the rainwater penetrates through the gap between the tip 45b of the upper first cover portion 45 and the front inclined surface 39a of the lower front step portion 39. In the event of strong wind and rain, the rainwater rises through the gap between the first cover portion 45 and the first protrusion 31 due to the pressure of the wind and rain. At this time, because the above length L1 is secured, it is unlikely that the rainwater will rise to the tip 31b of the first protrusion 31. Even if it does rise, the first waterproofing material 61 prevents the rainwater from penetrating. As a result, it is unlikely that rainwater will penetrate into the indoor Y side. 【0037】 If the first waterproofing material 61 is not installed, or if the first waterproofing material 61 has deteriorated and its waterproofing ability has decreased, and if rainwater were to exceed the tip 31b of the first protrusion 31, the rainwater could enter the first groove 33. However, if rainwater does enter the first groove 33, it will first accumulate at the bottom 33a of the first groove 33, making it unlikely that it will penetrate into the interior Y side. Furthermore, because the above length L2 is ensured, it is unlikely that rainwater will rise to the tip 32b of the second protrusion 32. Even if it does rise, the second waterproofing material 62 will prevent the rainwater from entering. As a result, it is unlikely that rainwater will penetrate into the interior Y side. 【0038】 The panel 1 joining structure of this embodiment described above is a joining structure in which panels 1 are joined together by fitting a first joining end 30 provided at one end of a panel 1 having a sandwich structure in which a core material 13 is sandwiched between two surface materials, namely a front surface material 11 and a back surface material 12, into a second joining end 40 provided at the other end of an adjacent panel 1. The first joining end 30 is spaced apart in the panel thickness direction and has a first protrusion 31 and a second protrusion 32 that protrude in the joining direction, which is on the side of the second joining end 40, and a first groove 3 between the first protrusion 31 and the second protrusion 32. The second joint end portion 40 has a second groove portion 42 into which the first projection portion 31 fits, a third groove portion 43 into which the second projection portion 32 fits, a third projection portion 44 into which the first groove portion 33 fits, a first cover portion 45 that covers the first projection portion 31 and is continuous with the surface, which is one side of the panel 1, and a second cover portion 46 that covers the second projection portion 32 and is continuous with the back surface, which is the other side of the panel 1. The first projection portion 31 and the second projection portion 32 are offset from each other in the joining direction, and the projection length of the second projection portion 32 is longer than the projection length of the first projection portion 31. 【0039】 In this embodiment, the panel 1 has the first joint end 30 positioned on the upper side and the second joint end 40 positioned on the lower side, and the front side material 11 is positioned on the outdoor X side and the back side material 12 is positioned on the indoor Y side, and the exterior wall 5 can be constructed by joining the joint ends 30 and 40 together. In this case, the second protrusion 32 is positioned above the first protrusion 31 in the joining direction, and the second protrusion 32 is positioned higher than the first protrusion 31 in terms of height. As a result, even if rainwater from the outdoor X side penetrates into the joint at the joint end, the first protrusion 31 and the second protrusion 32 effectively prevent the rainwater from penetrating, thus preventing it from seeping into the indoor Y side. 【0040】 In this embodiment, the first cover portion 45 and the second cover portion 46 are positioned offset from each other in the joining direction, and a portion of each, namely the upper part of the first cover portion 45 and the lower tip of the second cover portion 46, overlaps with each other in the panel thickness direction. 【0041】 This allows the tip of the second cover portion 46 on the indoor Y side to be positioned higher than the tip of the first cover portion 45 on the outdoor X side. As a result, the joint path can be made to be generally upward from the outdoor X side to the indoor Y side, creating a structure that is less susceptible to rainwater penetration. 【0042】 In this embodiment, it is preferable that the length along the joining direction from the tip 45b of the first cover portion 45 to the tip 31b of the first protruding portion 31 is 20 mm or more and 40 mm or less. 【0043】 As a result, the first protrusion 31 effectively prevents rainwater from entering, and the penetration of rainwater into the indoor Y side can be suppressed. 【0044】 In this embodiment, it is preferable that the length along the joining direction from the bottom 33a of the first groove 33 to the tip 32b of the second projection 32 is 20 mm or more and 40 mm or less. 【0045】 As a result, the second protrusion 32 effectively prevents rainwater from entering, further suppressing the penetration of rainwater into the interior Y side. 【0046】 In this embodiment, the first waterproofing material 61 is placed between the tip 31b of the first protrusion 31 and the bottom 42a of the second groove 42, and the second waterproofing material 62 is placed between the tip 32b of the second protrusion 32 and the bottom 43a of the third groove 43. 【0047】 This further enhances the effect of preventing rainwater infiltration by each of the waterproofing materials 61 and 62. 【0048】 In this embodiment, a screw member 50 with a head 50a is provided that penetrates from the surface side in the panel thickness direction of the first joint end 30 and fixes the panel 1 to the horizontal furring strip 55. The head 50a is covered by the first cover portion 45 in contact with the surface side of the front side material 11, and the front flat surface 39b of the front step portion 39 on which the head 50a is located is flat. 【0049】 As a result, the head 50a of the screw member 50 is not exposed, and the appearance from the outdoor X side is flat. In addition, the processing time for the front surface material 11 is reduced, which can lead to improved productivity and cost reduction. [Explanation of Symbols] 【0050】 1. Building material panel 11. Front and side material (surface material) 12. Back and side material (face material) 13 Core material 30 First joint end 31 First projection 32 Second projection 32b Tip of the second projection 33 First groove 33a Bottom of the first groove 39b Front flat surface (head placement area) 40 Second joint end 42 Second groove 42a Bottom of the second groove 43 Third groove 44 Third protrusion 45. First cover section 45b Tip of the first cover 46. ​​Second cover section 50 Screw components with heads 50a head 55 Horizontal furring strips (fixing members)

Claims

[Claim 1] A joining structure for joining building material panels, which have a sandwich structure in which a core material is sandwiched between two facing materials, by fitting a first joining end provided at one end of the building material panel with a second joining end provided at the other end of an adjacent building material panel, The first joint end is spaced apart in the panel thickness direction and has a first projection and a second projection that project in the joining direction toward the second joint end, and a first groove between the first projection and the second projection. The second joint end has a second groove into which the first projection fits, a third groove into which the second projection fits, a third projection into which the first groove fits, a first cover portion that covers the first projection and is continuous with one surface of the building material panel, and a second cover portion that covers the second projection and is continuous with the other surface of the building material panel. The first protrusion and the second protrusion are positioned offset from each other in the joining direction, and the protrusion length of the second protrusion is longer than the protrusion length of the first protrusion. A joining structure for building material panels, wherein the length along the joining direction from the tip of the first cover portion to the tip of the first protruding portion is 20 mm or more and 40 mm or less. [Claim 2] The joining structure for a building material panel according to claim 1, wherein the first cover portion and the second cover portion are arranged offset from each other in the joining direction, and a portion of each overlaps with each other in the panel thickness direction. [Claim 3] A joining structure for joining building material panels, which have a sandwich structure in which a core material is sandwiched between two facing materials, by fitting a first joining end provided at one end of the building material panel with a second joining end provided at the other end of an adjacent building material panel, The first joint end is spaced apart in the panel thickness direction and has a first projection and a second projection that project in the joining direction toward the second joint end, and a first groove between the first projection and the second projection. The second joint end has a second groove into which the first projection fits, a third groove into which the second projection fits, a third projection into which the first groove fits, a first cover portion that covers the first projection and is continuous with one surface of the building material panel, and a second cover portion that covers the second projection and is continuous with the other surface of the building material panel. The first protrusion and the second protrusion are positioned offset from each other in the joining direction, and the protrusion length of the second protrusion is longer than the protrusion length of the first protrusion. A joint structure for building material panels, wherein the length along the joining direction from the bottom of the first groove to the tip of the second projection is 20 mm or more and 40 mm or less. [Claim 4] A joining structure for joining building material panels, which have a sandwich structure in which a core material is sandwiched between two facing materials, by fitting a first joining end provided at one end of the building material panel with a second joining end provided at the other end of an adjacent building material panel, The first joint end is spaced apart in the panel thickness direction and has a first projection and a second projection that project in the joining direction toward the second joint end, and a first groove between the first projection and the second projection. The second joint end has a second groove into which the first projection fits, a third groove into which the second projection fits, a third projection into which the first groove fits, a first cover portion that covers the first projection and is continuous with one surface of the building material panel, and a second cover portion that covers the second projection and is continuous with the other surface of the building material panel. The first protrusion and the second protrusion are positioned offset from each other in the joining direction, and the protrusion length of the second protrusion is longer than the protrusion length of the first protrusion. From the side of the aforementioned surface, a screw member with a head is provided that penetrates in the panel thickness direction of the first joint end and fixes the building material panel to the fixing member, A joining structure for building material panels, wherein the head of the screw member with a head is covered by the first cover portion while in contact with one side of the surface material, and the head placement region on the surface material where the head is located is flat. [Claim 5] A joint structure for a building material panel according to any one of claims 1 to 4, wherein a water-stopping material is placed at least one of three locations between the tip of the first protrusion and the bottom of the second groove, between the tip of the second protrusion and the bottom of the third groove, and between the tip of the third protrusion and the bottom of the first groove.

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