Fastening tool, construction kit of building board, and construction method of building board

Abstract

To provide a fastening tool capable of making a decorative protrusion strip of a building board hard to chip.SOLUTION: A fastening tool 1 is used when constructing a building board 2 including a locking protrusion strip 22 protruding downward on the rear surface side, and a decorative protrusion strip 21 protruding further downward than the locking protrusion strip 22 on the surface side by extending the same to a substrate 4. The fastening tool 1 includes: a fixing piece 11 fixed to the substrate 4; a front support piece 12 protruding frontward from a lower end part of the fixing piece 11, for supporting a lower end 221 of the locking protrusion strip 22; an upper support piece 13 protruding upward from a front end part of the front support piece 12, for supporting a front surface 220 of the locking protrusion strip 22; and a lower support piece 14 protruding downward from a front end part of the front support piece 12, for supporting a rear surface 210 of the decorative protrusion strip 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE INVENTION The present invention relates generally to fasteners, building board installation kits, and building board installation methods. [Background technology]

[0002] Patent Document 1 discloses a fixing structure for armored wallboards. In this fixing structure for armored wallboards, upper and lower rows of armored wallboards are supported via metal pieces. The bases of these metal pieces are fixed to support members for the armored wallboards, and their lower ends are folded back so as to extend along the lower end surface of the upper row wallboard, along the overlapping interface between the lower row wallboard and the upper row wallboard. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication number 4-52343 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the fixing structure of the armored wall panels of Patent Document 1 had a problem in that the lower ends of the upper row of wall panels were prone to chipping when something hit them.

[0005] An object of the present invention is to provide a fastener, a building board installation kit, and a building board installation method that can make decorative ridges on building boards less likely to chip. [Means for solving the problem]

[0006] A fastener according to one aspect of the present invention is a fastener used when attaching a building board to a substrate, the building board having a locking ridge that protrudes downward on its back surface and a decorative ridge that protrudes downward from the locking ridge on its front surface. The fastener comprises a fixing piece that is fixed to the substrate, a front support piece that protrudes forward from the lower end of the fixing piece and supports the lower end of the locking ridge, an upper support piece that protrudes upward from the front end of the front support piece and supports the front surface of the locking ridge, and a lower support piece that protrudes downward from the front end of the front support piece and supports the rear surface of the decorative ridge.

[0007] A building board installation kit according to one aspect of the present invention is a building board installation kit including the fastener and an auxiliary member, wherein the auxiliary member includes a hook portion that is hooked onto the upper end of the building board, a holding portion that holds the fastener when temporarily fixing the fastener to the base, and a connecting portion that connects the hook portion and the holding portion.

[0008] In one aspect of the present invention, a method for installing building boards includes using the above-described installation kit to overlap the lower part of an upper building board with the surface of the upper part of a lower building board to perform armor cladding. The hooking portion of the auxiliary member is hooked onto the upper end of the lower building board, and while the fixing piece of the fastener is leaned against the surface of the lower building board, the fastener is held by the holding portion of the auxiliary member. In this state, the fastener is temporarily fixed to the base with a fixing device. Next, the auxiliary member is removed, and the fastener is permanently fixed to the base, and then the lower end of the upper building board is engaged with the fastener. [Effects of the Invention]

[0009] According to the present invention, the decorative ridges of the building board can be made less susceptible to chipping. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic cross-sectional view showing the main parts of a construction structure for installing a building board using a fastener according to this embodiment. [Figure 2]2A and 2B are side and front views of the fastener, respectively. [Figure 3] Fig. 3A is a perspective view showing an auxiliary member according to this embodiment, and Fig. 3B is a plan view showing the processing plate material before being processed into the auxiliary member. [Figure 4] FIG. 4 is a schematic cross-sectional view showing the construction of a building board using the fastener. [Figure 5] FIG. 5 is an enlarged view of part B in FIG. [Figure 6] FIG. 6 is a schematic perspective view showing one step of the building board installation method according to this embodiment. [Figure 7] FIG. 7 is a schematic perspective view showing another step of the above-mentioned building board installation method. [Figure 8] FIG. 8 is a schematic perspective view showing another step of the above-mentioned building board installation method. [Figure 9] FIG. 9 is a schematic perspective view showing another step of the above-mentioned building board installation method. [Figure 10] FIG. 10 is a schematic perspective view showing another step of the above-mentioned building board installation method. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1. Overview As mentioned above, the fixing structure of the armored wall panels of Patent Document 1 has a problem in that the lower end of the upper wall panel is easily chipped when something hits it. In order to solve this problem, the inventor has conducted extensive research and has completed the following fastener 1.

[0012] That is, as shown in Figure 1, the fastener 1 according to this embodiment is used when attaching a building board 2 to a base 4 for installation. The fastener 1 comprises a fixing piece 11, a front support piece 12, an upper support piece 13, and a lower support piece 14. The lower support piece 14 protrudes downward from the front end of the front support piece 12 and supports the rear surface 210 of the decorative ridge 21. Therefore, even if something hits the front surface of the decorative ridge 21, the decorative ridge 21 of the building board 2 is less likely to chip.

[0013] 2.Details The fastener 1, the installation kit for the building board 2, and the installation method for the building board 2 according to this embodiment will be described below with reference to FIGS. 1 to 10. Each figure is a schematic view, and the ratios of the sizes and thicknesses of the components in each figure do not necessarily reflect the actual dimensional ratios. Arrows indicating the up-down direction, left-right direction, front-rear direction, longitudinal direction L, and lateral direction S in each figure are merely shown to facilitate understanding of the explanation and do not have any substance. A view along the left-right direction is sometimes referred to as a "side view," and a view along the front-rear direction is sometimes referred to as a "front view." "Front surface" is roughly synonymous with "front surface" in the sense of the surface opposite to the back surface, and "back surface" is roughly synonymous with "rear surface."

[0014] (1) Premise The fastener 1 according to this embodiment is used when attaching a building board 2 to a base 4. First, the building board 2 and the base 4 will be described.

[0015] <Architectural board> The building board 2 is not particularly limited, but in this embodiment, it is used for interior wall finishing. For example, the building board 2 is a ceramic interior material. The building board 2 has a rectangular shape when viewed from the front. The length in the up-down direction (vertical dimension) of the building board is not particularly limited, but is, for example, 466 mm. The length in the left-right direction (horizontal dimension) of the building board is not particularly limited, but is, for example, 3030 mm.

[0016] The building board 2 has two solid portions 20. The two solid portions 20 are an upper solid portion 20U and a lower solid portion 20L. The upper solid portion 20U protrudes upward on the back surface side. The upper solid portion 20U extends in the left-right direction. As shown in FIG. 1 , the lower solid portion 20L includes a locking ridge 22 and a decorative ridge 21. In this way, the building board 2 has the locking ridge 22 and the decorative ridge 21.

[0017] The locking ridge 22 protrudes downward from the back surface side. The locking ridge 22 extends in the left-right direction. The locking ridge 22 has a lower end 221 and a front surface 220.

[0018] On the other hand, the decorative ridge 21 protrudes downward from the front surface side further than the locking ridge 22. The decorative ridge 21 extends in the left-right direction. The decorative ridge 21 has a rear surface 210.

[0019] A groove 23 exists between the decorative ridge 21 and the locking ridge 22. The groove 23 is recessed upward. The groove 23 extends in the left-right direction. The groove 23 is formed by the intersection of the front surface 220 of the locking ridge 22 and the rear surface 210 of the decorative ridge 21, forming a roughly V-shape in side view. Note that the locking ridge 22 and the decorative ridge 21 each refer to the portion that exists below the deepest part of the groove 23 (the portion where the front surface 220 and the rear surface 210 intersect).

[0020] <Base> The base 4 (body) is not particularly limited, but examples thereof include a wooden base and a light gauge steel (LGS) base. As shown in FIG. 4, the base 4 extends in the vertical direction, covering the area from the floor material 6 to the ceiling material 8. As shown in FIGS. 6 to 9, the bases 4 are lined up in the horizontal direction. The distance between adjacent bases 4 in the horizontal direction is shorter than the horizontal dimension of the building board 2. Various surface materials may be arranged on the surface (outer surface) of the base 4.

[0021] (2) Fastener Next, the fastener 1 according to this embodiment will be described. As described above, the fastener 1 is used when attaching the building board 2 to the base 4. Preferably, the fastener 1 is used for construction by armoring the building board 2. Incidentally, armoring is a construction method in which the building boards 2 are installed by stacking them like armor.

[0022] The material of the fastener 1 is not particularly limited, but is, for example, a steel plate. In this embodiment, the fastener 1 is formed by appropriately punching and bending a steel plate. The steel plate is not particularly limited, but examples thereof include plated steel plates such as Galvalume Steel Plate (registered trademark).

[0023] The horizontal dimension (H) of the fastener 1 may be less than the horizontal dimension of the building board 2, but is preferably equal to or greater than the horizontal dimension of the building board 2. In this embodiment, the horizontal dimension (H) of the fastener 1 is approximately the same as the horizontal dimension of the building board 2. For example, if the horizontal dimension of the building board 2 is 3030 mm, the horizontal dimension (H) of the fastener 1 is also 3030 mm.

[0024] As shown in FIG. 2, the fastener 1 includes a fixing piece 11, a front support piece 12, an upper support piece 13, and a lower support piece .

[0025] <Fixed piece> As shown in FIG. 1, the fixing piece 11 is fixed to the base 4. In this embodiment, the fixing piece 11 is indirectly fixed to the base 4. Specifically, the fixing piece 11 is fixed to the base 4 via a building board 2, or as shown in FIG. 5, the fixing piece 11 is fixed to the base 4 via a height adjustment member 72. In this manner, the fastener 1 is fixed to the base 4.

[0026] As shown in Fig. 2B, a plurality of through holes 110 (screw holes in this embodiment) are formed in the fixing piece 11. As shown in Fig. 1, fixing devices 5 (screws in this embodiment) are inserted into the through holes 110. The plurality of through holes 110 are arranged at predetermined intervals in the left-right direction.

[0027] The fixing piece 11 is provided with a support ridge 111 below the multiple through holes 110. The support ridge 111 is generally V-shaped in side view and protrudes forward. The support ridge 111 extends in the left-right direction. Therefore, the support ridge 111 can support the building board 2 from behind, as shown in FIG. 1.

[0028] <Front support piece> 2A, the front support piece 12 protrudes forward from the lower end of the fixed piece 11. In this embodiment, the front support piece 12 protrudes substantially perpendicular to the fixed piece 11. As shown in FIG. 1, the front support piece 12 supports the lower end 221 of the locking ridge 22.

[0029] <Upper support piece> As shown in Fig. 2A, the upper support piece 13 protrudes upward from the front end of the front support piece 12. In this embodiment, the upper support piece 13 protrudes upward while tilting forward. Note that, as shown in Fig. 2A, the upper support piece 13 does not need to be physically connected to the front end of the front support piece 12, as long as it protrudes upward from near the front end of the front support piece 12.

[0030] 1, the upper support piece 13 is inserted into the groove 23 of the building board 2. In this way, the upper support piece 13 supports the front surface 220 of the locking ridge 22.

[0031] <Lower support piece> 2A, the lower support piece 14 protrudes downward from the front end of the front support piece 12. In this embodiment, the lower support piece 14 protrudes downward while inclining forward.

[0032] 2A, in this embodiment, the steel plate is folded over in the lower support piece 14. Therefore, the thickness of the lower support piece 14 is greater than the thicknesses of the other parts (the thickness of the fixed piece 11, the thickness of the front support piece 12, and the thickness of the upper support piece 13).

[0033] As shown in FIG. 1 , the lower support piece 14 supports the rear surface 210 of the decorative ridge 21. In this embodiment, the lower support piece 14 supports the rear surface 210 of the decorative ridge 21 by line contact. Specifically, the tip of the lower support piece 14 is in line contact with the rear surface 210 of the decorative ridge 21. The position of the line contact is not particularly limited as long as it is a position included in the lower half of the rear surface 210. The closer the position of the line contact is to the lower end of the rear surface 210, the more preferable it is, and the lower end of the rear surface 210 is more preferable.

[0034] Furthermore, the lower support piece 14 is inclined with respect to the rear surface 210 of the decorative ridge 21. In this manner, in this embodiment, the lower support piece 14 is in line contact with the rear surface 210 of the decorative ridge 21 while being inclined.

[0035] (3) Building board installation kit Next, a description will be given of a construction kit for the building board 2 according to this embodiment.

[0036] The installation kit for the building board 2 is suitable for direct use in carrying out the installation method for the building board 2. The installation kit for the building board 2 includes a fastener 1 and an auxiliary member 3. The number of each of the fasteners 1 and auxiliary members 3 included in the installation kit for the building board 2 is not particularly limited, as long as there is one or more. The auxiliary members 3 included in the installation kit for the building board 2 also include processing board materials 30 before being processed into the auxiliary members 3.

[0037] <Auxiliary parts> The auxiliary member 3 is used to assist in the process of fixing the fastener 1 to the base 4. Specifically, the auxiliary member 3 is used to hold the fastener 1 horizontally until it is temporarily fixed to the base 4. In this embodiment, the installation kit for the building board 2 includes two auxiliary members 3. The two auxiliary members 3 have the same shape and size. As long as the fastener 1 can be held horizontally, the installation kit for the building board 2 may include only a single auxiliary member 3.

[0038] The material of the auxiliary member 3 is the same as the material of the fastener 1. As shown in FIG.

[0039] <Hooking part> As shown in Figure 7, the hook portion 31 is hooked onto the upper end of the building board 2. The hook portion 31 is roughly L-shaped when viewed from the side. The hook portion 31 has an upper piece 311 and a hanging piece 312. The upper piece 311 is the part that rests on the upper end of the building board 2. The length (front-to-back direction) of the upper piece 311 is approximately equal to the thickness of the building board 2. The hanging piece 312 protrudes downward from the rear end of the upper piece 311. The building board 2 is sandwiched between the hanging piece 312 and the connecting portion 33.

[0040] ≪Holding part≫ 8, the holding portion 32 holds the fastener 1 when the fastener 1 is temporarily fixed to the base 4. The fastener 1 is placed on the upper surface of the holding portion 32.

[0041] ≪Connection part≫ 3A, the connecting portion 33 connects the hook portion 31 and the holding portion 32. The fastener 1 is leaned against the front surface of the connecting portion 33, as shown in FIG.

[0042] 3A, an upper piece 311 of the hook portion 31 protrudes rearward from the upper end of the connecting portion 33. A holding portion 32 protrudes forward from the lower end of the connecting portion 33.

[0043] The length (vertical direction) of the connecting portion 33 is approximately equal to the length (vertical direction) of the portion where the building boards 2 overlap. Therefore, the difference between the vertical dimension of the building board 2 and the length (vertical direction) of the connecting portion 33 is the working width W. Note that the working width W means the length (vertical direction) of the portion of each building board 2 that is exposed forward in the construction structure of the building board 2, as shown in Figure 4.

[0044] <Plate material for processing> The work plate material 30 is a plate material to be processed into the auxiliary member 3. When the work plate material 30 is processed into the auxiliary member 3, the length (vertical direction) of the connecting portion 33 can be changed as appropriate.

[0045] As shown in FIG. 3B, the processing plate material 30 has a long rectangular shape. The processing plate material 30 includes a plurality of regions. The regions are divided by a plurality of boundary lines 35 (35a to 35g) parallel to the short side direction S. The boundary lines 35 are formed by a plurality of punched holes 350 aligned in the short side direction S. Therefore, the processing plate material 30 can be bent or cut at the boundary lines 35. When bending at the boundary lines 35, the angle is approximately 90 degrees.

[0046] The plurality of regions are arranged in the longitudinal direction L in this order: two hooking regions 31a, 31b, one connecting region 33a, four multi-purpose regions 34a to 34d, and one holding region 32a.

[0047] <Hook-up area> The two hooking regions 31a, 31b are regions that can become the hooking portion 31 in the auxiliary member 3. For example, when the boundary lines 35a, 35b of the processing plate material 30 shown in FIG. 3B are bent to form a mountain fold, the two hooking regions 31a, 31b can form the hooking portion 31. In other words, the hooking region 31a becomes the hanging piece 312, and the hooking region 31b becomes the upper piece 311.

[0048] ≪Connection area≫ The connecting region 33a is a region that can become the connecting portion 33 in the auxiliary member 3. The length of the connecting region 33a in the longitudinal direction L is the minimum value of the length (vertical direction) of the connecting portion 33. In this embodiment, the length of the connecting region 33a in the longitudinal direction L is, for example, 96 mm.

[0049] ≪Common area≫ The four multi-purpose regions 34a to 34d are regions that can serve as the connecting portion 33 or the holding portion 32 in the auxiliary member 3. The length (vertical direction) of each of the four multi-purpose regions 34a to 34d is, for example, 35 mm.

[0050] For example, if only boundary line 35e of boundaries 35c to 35g is folded to form a valley fold, the dual-use areas 34a and 34b between boundary line 35e and connecting area 33a become connecting portion 33, and the dual-use areas 34c and 34d between boundary line 35e and holding area 32a become holding portion 32.

[0051] Furthermore, when only boundary line 35c of boundary lines 35c to 35g is folded to form a valley fold, all of dual-purpose areas 34a to 34d existing between boundary line 35c and holding area 32a become holding portion 32. In this case, the length (vertical direction) of connecting portion 33 becomes the minimum value (96 mm).

[0052] Furthermore, when only boundary line 35g among boundary lines 35c to 35g is folded to form a valley fold, all of dual-purpose regions 34a to 34d existing between boundary line 35g and connecting region 33a become connecting portion 33. In this case, the length (vertical direction) of connecting portion 33 becomes the maximum value (236 mm).

[0053] As shown in FIG. 3B, the five boundary lines 35c-35g correspond one-to-one to the five numbers W1-W5. The five numbers W1-W5 indicate the working width W. Specifically, in this embodiment, the five numbers W1-W5 corresponding one-to-one to the five boundary lines 35c-35g are "370," "335," "300," "265," and "230," respectively. These five numbers W1-W5 are displayed near the corresponding five boundary lines 35c-35g. For example, the distance between the display location of the number "300" W3 and the boundary line 35e corresponding to "300" is shorter than the distance between the display location of the number "300" W3 and a boundary line 35 (such as boundary line 35d) that does not correspond to "300." In this embodiment, the five numbers W1-W5 are printed on a sticker 36 as shown in FIG. 3B, and the sticker 36 is attached to the processing plate 30. The five numbers W1 to W5 may be engraved directly on the processing plate 30.

[0054] Here, for example, if boundary line 35e corresponding to number W3 "300" is folded so as to form a valley fold, the dual-use areas 34a, 34b existing between boundary line 35e and connecting area 33a become connecting portion 33. As a result, the length (vertical direction) of connecting portion 33 becomes 166 mm (= 96 mm + 35 mm × 2). As mentioned above, the length (vertical direction) of connecting portion 33 is approximately equal to the length (vertical direction) of the portion where the building boards 2 overlap, so the working width W at this time is 300 mm (= 466 mm - 166 mm).

[0055] ≪Holding area≫ The holding region 32a is a region of the auxiliary member 3 that can become the holding portion 32. As described above, the length of the holding portion 32 can change depending on which of the boundary lines 35c to 35g is bent. If the length of the holding portion 32 is too long, unnecessary portions may be cut off. For example, in FIG. 3A, the portion indicated by the dashed line is unnecessary. In this way, the holding region 32a can be said to be a region that can be cut off when bending is not performed along boundary line 35g.

[0056] (4) Construction method of building boards Next, a method for installing the building boards 2 according to this embodiment will be described. Hereinafter, the terms "lower" and "upper" are used simply to indicate the relative positional relationship between two building boards 2 adjacent to each other in the vertical direction. Of the building boards 2L in the lower row, the building board 2 closest to the floor material 6 may be particularly referred to as the lowest building board 2. Of the building boards 2U in the upper row, the building board 2 closest to the ceiling material 8 may be particularly referred to as the highest building board 2.

[0057] In the method for installing building boards 2 according to this embodiment, the building boards 2 are installed while being stacked using the fastener 1 described above. Specifically, the work of stacking the lower part of the upper building board 2U on the upper surface of the lower building board 2L using the fastener 1 described above is repeated as necessary. In this way, by using the method for installing building boards 2, an installed structure of building boards 2 as shown in Figure 4 can be formed. This installed structure of building boards 2 is suitably formed on indoor walls. In other words, the installed structure of building boards 2 using the fastener 1 according to this embodiment is suitable for interior use. Note that in the left-right direction, the building boards 2 are installed by butting. In other words, the building boards 2 are simply butted together in the left-right direction and joined.

[0058] Below, the construction structure of the building board 2 will be divided into the floor joint portion, the overlap portion between the building boards 2, and the ceiling joint portion, and the construction method of the building board 2 in each portion will be explained.

[0059] <Floor joint> First, the floor joint portion will be described with reference to Figures 4 to 7. Figure 5 is an enlarged view of part B in Figure 4.

[0060] As shown in Figure 5, a baseboard 7 and a thickness-adjusting material 71 are placed at the intersection of the flooring material 6 and the basement 4. The thickness-adjusting material 71 is a horizontal material (structural plywood) that has approximately the same width as the baseboard 7 and extends in the left-right direction. The thickness-adjusting material 71 is interposed between the baseboard 7 and the basement 4. By adjusting the thickness of the thickness-adjusting material 71, the protrusion of the baseboard 7 (the degree of forward projection) can be adjusted.

[0061] Next, the height-adjusting member 72 is fastened to the baseboard 4 above the baseboard 7 and the thickness-adjusting member 71 by appropriate means. The height-adjusting member 72 is a horizontal member (structural plywood) extending in the left-right direction. By adjusting the height of the height-adjusting member 72, the inclination angle of the building board 2 can be adjusted. Here, the inclination angle of the building board 2 means the inclination angle of the building board 2 relative to the extension direction (up-down direction) of the baseboard 4. Furthermore, the height of the height-adjusting member 72 means the distance (front-to-back direction) from the front surface of the baseboard 4 to the front surface of the height-adjusting member 72.

[0062] Next, as shown in Figure 6, the upper end of fastener 1 is aligned with the upper end of height adjustment member 72, and fastener 1 is fixed to base 4 with fixing member 5 via height adjustment member 72. The fixing member 5 is not particularly limited, but examples thereof include screws. The material of fixing member 5 is not particularly limited, but examples thereof include stainless steel. When forming a floor joint in this way, it is not necessary to use auxiliary member 3 from the construction kit for building board 2.

[0063] Next, a spacer 73 is attached to the front surface of the base 4 above the fastener 1. The distance between the fastener 1 and the spacer 73 is shorter than the vertical dimension of the building board 2. The material of the spacer 73 is not particularly limited, but is, for example, polypropylene.

[0064] Next, as shown in Figure 7, the lower solid portion 20L of the building board 2 (the lowest building board 2) is inserted into the fastener 1. As a result, as shown in Figure 5, the front support piece 12 of the fastener 1 supports the lower end 221 of the locking ridge 22, the upper support piece 13 supports the front surface 220 of the locking ridge 22, and the lower support piece 14 supports the rear surface 210 of the decorative ridge 21. After that, the building board 2 is tilted toward the base 4. In this case, by interposing a spacer 73 between the building board 2 and the base 4, it is possible to prevent the building board 2 from cracking. Note that the spacer 73 does not necessarily have to touch the back surface of the building board 2, as long as it is sufficient to prevent cracking due to excessive deflection of the building board 2.

[0065] In this manner, the floor joint is formed.

[0066] <Overlapping parts of building boards> Next, the overlapping portions of the building boards 2 will be described with reference to Figures 1, 4, and 7 to 10. Figure 1 is an enlarged view of part A in Figure 4. At the overlapping portions of the building boards 2, a building board 2 installation kit is used to overlap the lower part of the upper building board 2U on the upper surface side of the lower building board 2L to perform armor cladding.

[0067] First, two processing plate materials 30 are processed into two auxiliary members 3 of the same shape and size. Specifically, boundary lines 35a and 35b of processing plate material 30 shown in FIG. 3B are bent so as to form mountain folds to form hook portions 31. Meanwhile, boundary line 35 corresponding to the desired working width W is selected from boundary lines 35c to 35g of processing plate material 30, and this boundary line 35 is bent so as to form a valley fold to form holding portion 32. In this way, two auxiliary members 3 are obtained.

[0068] 7, the hook portions 31 of the auxiliary members 3 are hooked onto the upper end of the lower building board 2L. In this embodiment, two auxiliary members 3 are hooked onto both left and right ends of the upper end of the lower building board 2L.

[0069] Next, as shown in Figure 8, the fastener 1 is held by the holding part 32 of the auxiliary member 3 while the fixing piece 11 of the fastener 1 is leaned against the surface of the lower building board 2L, and in this state the fastener 1 is temporarily fixed to the base 4 by the fixing device 5. Here, temporary fixing means that the fastener 1 is fixed to the base 4 to an extent that the auxiliary member 3 can move left and right.

[0070] In this embodiment, the fastener 5 is inserted into the through hole 110 located between the two auxiliary members 3. In other words, the fastener 5 is not inserted into the through hole 110 located to the left of the left auxiliary member 3. Similarly, the fastener 5 is not inserted into the through hole 110 located to the right of the right auxiliary member 3.

[0071] Next, as shown in Figure 9, the auxiliary members 3 are removed. That is, since no fasteners 5 are inserted into the through holes 110 located to the left of the left auxiliary member 3, the left auxiliary member 3 can be removed by moving it to the left. Similarly, since no fasteners 5 are inserted into the through holes 110 located to the right of the right auxiliary member 3, the right auxiliary member 3 can be removed by moving it to the right. In this way, the auxiliary members 3 are removed before the fastener 1 is permanently fixed to the base 4.

[0072] Next, the fastener 1 is permanently fixed to the base 4, and then the lower end of the upper building board 2U is engaged with the fastener 1 as shown in Figure 10. Here, permanent fixing means that the fastener 1 is fixed to the base 4 so that there is no rattle of the fastener 1.

[0073] In addition, "engagement" means to engage and fasten. In particular, in this embodiment, "engagement" means that the front support piece 12 of the fastener 1 supports the lower end 221 of the locking ridge 22, the upper support piece 13 supports the front surface 220 of the locking ridge 22, and the lower support piece 14 supports the rear surface 210 of the decorative ridge 21, as shown in FIG.

[0074] After the lower end of the upper building board 2U is engaged with the fastener 1, the upper building board 2U is tilted toward the base 4. In this way, an overlapping portion is formed between the building boards 2. Note that a spacer 73 may be attached to the front surface of the base 4 in advance so that the spacer 73 is interposed between the upper building board 2U and the base 4 when the upper building board 2U is tilted toward the base 4.

[0075] There may be multiple overlapping portions between the building boards 2 depending on the height of the room (the distance from the floor material 6 to the ceiling material 8). Therefore, the above series of operations may be repeated as necessary. In this case, the two auxiliary members 3 can be reused.

[0076] <Ceiling joint> Next, the ceiling joint will be described with reference to FIG.

[0077] The top building board 2 is fixed to the base 4 by fasteners 5. A spacer 73 is interposed between the top building board 2 and the base 4. The vertical dimension of the top building board 2 may be shorter than the vertical dimension of the other building boards 2 (building boards 2 other than the top building board 2). In other words, the top end of a normal building board 2 may be cut off to make it the top building board 2. In this case, the thickness of the spacer 73 interposed between the top building board 2 and the base 4 is adjusted to match the inclination angle of the top building board 2 to the inclination angle of the other building boards 2.

[0078] In this manner, the ceiling joint is formed, and the construction structure of the building board 2 as shown in FIG. 4 is completed.

[0079] (5) Effects In the construction structure of the building board 2 using the fastener 1 according to this embodiment, as shown in Fig. 1, the lower support piece 14 of the fastener 1 supports the rear surface 210 of the decorative ridge 21. Because there is a gap between the rear surface 210 of the decorative ridge 21 of the upper building board 2U and the surface of the lower building board 2L, if the lower support piece 14 were not present, there would be a risk of the decorative ridge 21 chipping off when something hits the front surface of the decorative ridge 21. In this embodiment, even if the gap exists, the lower support piece 14 supports the rear surface 210 of the decorative ridge 21, so that even if something hits the front surface of the decorative ridge 21, the decorative ridge 21 of the building board 2 is less likely to chip off.

[0080] The fastener 1 according to this embodiment is used for construction by armoring the building boards 2. In this case, there may be a plurality of overlapping portions between the building boards 2, but at each overlapping portion between the building boards 2, the lower support piece 14 of the fastener 1 supports the rear surface 210 of the decorative ridge 21, making it possible to make the decorative ridge 21 of the building board 2 less likely to chip.

[0081] Furthermore, since the horizontal dimension H of the fastener 1 according to this embodiment is equal to or greater than the horizontal dimension of the building board 2, the building board 2 can be stably locked to the fastener 1. Furthermore, at least one building board 2 can be locked to one fastener 1. In other words, there is no need to lock one building board 2 to two or more fasteners 1.

[0082] Furthermore, the installation kit for the building board 2 according to this embodiment includes the fastener 1 and the auxiliary member 3. Therefore, when installing the building board 2, the fastener 1 can be easily aligned using the auxiliary member 3. As a result, when fixing the fastener 1 to the base 4 via the lower building board 2L, it is not necessary to mark the surface of the lower building board 2L in advance to indicate the position of the fastener 1.

[0083] In particular, in this embodiment, the processing plate material 30 can be processed into the auxiliary member 3. The processing plate material 30 can be easily processed at the construction site. Furthermore, two or more types of auxiliary members 3 with different lengths (vertical direction) of the connecting portion 33 can be obtained from one type of processing plate material 30. This makes it possible to freely change the working width W at the construction site. Furthermore, the auxiliary member 3 can be used repeatedly. Furthermore, the processing plate material 30 is less bulky than the auxiliary member 3, making it convenient to carry.

[0084] 3. Variations In this embodiment, the building board 2 includes the upper solid portion 20U, but the building board 2 does not necessarily have to include the upper solid portion 20U.

[0085] In this embodiment, the fixing piece 11 is indirectly fixed to the base 4, but the fixing piece 11 may also be directly fixed to the base 4.

[0086] In this embodiment, the lower support piece 14 supports the rear surface 210 of the decorative ridge 21 through line contact, but the lower support piece 14 may support the rear surface 210 of the decorative ridge 21 through surface contact.

[0087] In this embodiment, the processing plate 30 includes four multi-purpose regions 34, but the processing plate 30 may include one to three multi-purpose regions 34, or may include five or more multi-purpose regions 34.

[0088] In this embodiment, the baseboard 7 and the thickness adjusting member 71 are present at the floor joint portion, but the baseboard 7 and the thickness adjusting member 71 do not necessarily have to be present.

[0089] In this embodiment, the fastener 1 is used to support the first (lowest) building board 2 in construction by armoring, and also to support building boards 2 in the second and subsequent stages. However, the fastener 1 may also be used to support the lowest building board 2 (a so-called starter) when construction is not by armoring, but rather when engaging the upper solid portion 20U and the lower solid portion 20L to make the surfaces of adjacent building boards 2 in the vertical direction flush.

[0090] 4. Aspects As is clear from the above-described embodiment and modifications, the present invention includes the following aspects. In the following, reference numerals are given in parentheses only to clarify the correspondence with the embodiment.

[0091] The first aspect is a fastener (1) used when attaching a building board (2) having a locking ridge (22) protruding downward on the back side and a decorative ridge (21) protruding downward on the front side of the locking ridge (22) to a base (4). The fastener (1) comprises a fixing piece (11) fixed to the base (4), a front support piece (12) protruding forward from the lower end of the fixing piece (11) and supporting the lower end (221) of the locking ridge (22), an upper support piece (13) protruding upward from the front end of the front support piece (12) and supporting the front surface (220) of the locking ridge (22), and a lower support piece (14) protruding downward from the front end of the front support piece (12) and supporting the rear surface (210) of the decorative ridge (21).

[0092] According to this embodiment, the decorative ridges (21) of the building board (2) can be made less susceptible to chipping.

[0093] The second aspect is a fastener (1) based on the first aspect, which is used for construction of the building board (2) by armoring.

[0094] According to this embodiment, even if there are multiple overlapping portions between the building boards (2), the decorative ridges (21) of the building boards (2) can be made less likely to chip at each overlapping portion between the building boards (2).

[0095] A third aspect is a fastener based on the first or second aspect. In the third aspect, the horizontal dimension (H) of the fastener (1) is equal to or greater than the horizontal dimension of the building board (2).

[0096] According to this embodiment, the building board (2) can be stably locked to the fastener (1).

[0097] The fourth aspect is a construction kit for a building board (2), comprising a fastener (1) based on any one of the first to third aspects and an auxiliary member (3). The auxiliary member (3) comprises a hooking portion (31) that is hooked onto the upper end of the building board (2), a holding portion (32) that holds the fastener (1) when temporarily fixing the fastener (1) to the base (4), and a connecting portion (33) that connects the hooking portion (31) and the holding portion (32).

[0098] According to this embodiment, when the building board (2) is installed, the fastener (1) can be easily positioned by the auxiliary member (3).

[0099] The fifth aspect is a method for installing building boards (2), in which the installation kit for building boards (2) based on the fourth aspect is used to overlap the lower part of the upper building board (2; 2U) on the surface of the upper part of the lower building board (2; 2L) to perform armoring. The hook part (31) of the auxiliary member (3) is hooked onto the upper end of the lower building board (2; 2L), and the fixing piece (11) of the fastener (1) is leaned against the surface of the lower building board (2; 2L), while the fastener (1) is held by the holding part (32) of the auxiliary member (3). In this state, the fastener (1) is temporarily fixed to the base (4) with the fixing device (5). Next, the auxiliary member (3) is removed, and the fastener (1) is permanently fixed to the base (4), and then the lower end of the upper building board (2; 2U) is engaged with the fastener (1).

[0100] According to this embodiment, the decorative ridges (21) of the building board (2) can be made less susceptible to chipping. [Explanation of symbols]

[0101] 1 Fastener 11 Fixed piece 12 Front support piece 13 Upper support piece 14 Lower support piece 2 Architectural board 21 Decorative ridges 22 Locking protrusion 2U upper building board 2L Lower building board 3 Auxiliary parts 31 Hook 32 Holding part 33 Connecting part 4. Base 5 Fixtures H horizontal dimension

Claims

1. A fastener used when attaching a building board to a base, the fastener having a locking ridge that protrudes downward on the back side and a decorative ridge that protrudes downward from the locking ridge on the front side, The fastener is a fixing piece fixed to the base; a front support piece that protrudes forward from a lower end of the fixing piece and supports a lower end of the locking protrusion; an upper support piece that protrudes upward from a front end of the front support piece and supports a front surface of the locking protrusion; a lower support piece that protrudes downward from the front end of the front support piece and supports the rear surface of the decorative convex strip, Fastener.

2. Used for construction by armoring the building board, The fastener of claim 1 .

3. The horizontal dimension of the fastener is equal to or greater than the horizontal dimension of the building board. The fastener of claim 1 .

4. A construction kit for a building board comprising the fastener according to any one of claims 1 to 3 and an auxiliary member, The auxiliary member is a hook portion that can be hooked onto the upper end of the building board; a holding portion that holds the fastener when the fastener is temporarily fixed to the base; a connecting portion that connects the hook portion and the holding portion, Construction board installation kit.

5. A method for installing building boards by overlapping the lower part of an upper building board with the surface of the upper part of a lower building board using the installation kit for building boards according to claim 4, The hook portion of the auxiliary member is hooked onto the upper end of the lower building board, and the fastener is held by the holding portion of the auxiliary member while the fixing piece of the fastener is leaned against the surface of the lower building board. In this state, the fastener is temporarily fixed to the base using a fixing device, and then the auxiliary member is removed, and the fastener is permanently fixed to the base, and the lower end of the upper building board is engaged with the fastener. How to install building boards.

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