Scaffolding board

Abstract

To provide a scaffolding board capable of reliably preventing displacement when stacked vertically by adding a simple structure. [Solution] A scaffold board 1 includes a scaffold board main body 2 and two end frame members 3 attached to both left and right ends of the scaffold board main body 2. An upper plate portion 31 of the end frame member 3 has a first upper positioning portion 35a consisting of an upper convex portion and a second upper positioning portion 35b consisting of an upper opening recess or hole. A lower plate portion 33 of the end frame member 3 has a first lower positioning portion 36a consisting of a lower opening recess or hole and a second lower positioning portion 36b consisting of a lower convex portion. When two scaffold boards 1 are stacked with their back surfaces facing downward, the first upper positioning portion 35a of the lower scaffold board 1 is fitted with the first lower positioning portion 36a of the upper scaffold board 1, and the second upper positioning portion 35b of the lower scaffold board 1 is fitted with the second lower positioning portion 36b of the upper scaffold board 1, thereby restricting the relative movement of both scaffold boards 1 in the length direction and width direction.

Description

[Technical field]

[0001] The present invention relates to a scaffolding board used as a member constituting a working floor of a temporary scaffolding. [Background technology]

[0002] In temporary scaffolding, the components that make up the work floor are generally scaffolding boards (floor-attached cloth frames) that are installed on two cloth materials on the left and right sides of the temporary scaffolding. Scaffolding boards are available in both wooden and metal, but in recent years, metal scaffolding boards have become mainstream due to their superior durability and strength. Here, as an example of a metal scaffolding board, as shown in Patent Document 1 and the like, a scaffolding board material having a top board portion that is long in the left-right direction, two side wall portions extending downward from the front and rear edges of the top board portion, and two lower wall portions extending inward in the front-to-rear direction from the lower edges of both side walls is arranged alone or in parallel front-to-back and connected to each other to form a scaffolding board main body, two end frame members attached to both the left and right ends of the scaffolding board main body, and four hanging fittings that are attached in pairs to both the left and right ends of the scaffolding board main body at intervals in the front-to-rear direction and are hung on a fabric material, the scaffolding board main body being arranged alone or in parallel front-to-rear and connected to each other, two end frame members attached to both the left and right ends of the scaffolding board main body, and four hanging fittings that are attached in pairs each to both the left and right ends of the scaffolding board main body at intervals in the front-to-rear direction and are hung on a fabric material, as shown in Patent Document 1 and the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-249719 A Summary of the Invention [Problem to be solved by the invention]

[0004] Since a large number of scaffolding boards are used in temporary scaffolding, they are usually transported and stored in a stacked state. Therefore, if the scaffolding boards are misaligned horizontally when stacked on top of each other, it may cause problems during transportation and storage.

[0005] An object of the present invention is to provide a scaffolding board that can reliably prevent displacement when stacked one on top of the other by adding a simple structure. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention comprises the following aspects.

[0007] 1) A scaffolding board body, which is formed by arranging a single scaffolding board material having a top board portion that is long in the left-right direction, two side wall portions extending downward from both front and rear edges of the top board portion, and two lower wall portions extending inward in the front-rear direction from the lower edges of both side walls, or by arranging a plurality of scaffolding board materials in a front-rear parallel arrangement and connecting them to each other; The scaffolding board has two end frame members that are long in the front-rear direction and are attached to both the left and right ends of the scaffolding board body. The end frame member has an upper plate portion arranged and fixed to the upper surfaces of both left and right ends of the scaffolding board body, a side plate portion extending downward from the left and right outer edges of the upper plate portion, and a lower plate portion extending inward in the left and right direction from the lower edges of the side plate portion, The upper plate portions of the two end frame members have a first upper positioning portion consisting of an upper convex portion formed near one of two pairs of diagonal portions of an imaginary square having the upper plate portions as its two left and right sides and at a position point-symmetrical with respect to the center of the scaffolding board body, and a second upper positioning portion consisting of an upper opening recess or hole formed near the other pair of diagonal portions of the scaffolding board body and at a position point-symmetrical with respect to the center of the scaffolding board body, the lower plate portions of the two end frame members have a first lower positioning portion formed at a location corresponding to the first upper positioning portion and consisting of a downwardly opening recess or hole that can be fitted with an upper protrusion constituting the first upper positioning portion, and a second lower positioning portion formed at a location corresponding to the second upper positioning portion and consisting of a downward protrusion that can be fitted with an upwardly opening recess or hole that constitutes the second upper positioning portion, A scaffolding board characterized in that, when two scaffolding boards are stacked with their undersides facing downwards, a first upper positioning portion of the lower scaffolding board is engaged with a first lower positioning portion of the upper scaffolding board, and a second upper positioning portion of the lower scaffolding board is engaged with a second lower positioning portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the longitudinal and lateral directions.

[0008] 2) the upper convex portion constituting the first upper positioning portion and the lower convex portion constituting the second lower positioning portion, and the upper opening recess or hole constituting the second upper positioning portion and the lower opening recess or hole constituting the first lower positioning portion are each the same shape and size except for the up and down orientations; A scaffolding board as defined in 1) above, in which, when two scaffolding boards are stacked with their back sides facing each other, the first lower positioning portion of the lower scaffolding board is engaged with the second lower positioning portion of the upper scaffolding board, and the second lower positioning portion of the lower scaffolding board is engaged with the first lower positioning portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the longitudinal and transverse directions.

[0009] 3) A scaffolding board as described in 1) or 2) above, in which the upper plate portion of the end frame member has two protruding portions protruding inward in the left-right direction from near both the front and rear ends, and a first upper positioning portion and a second upper positioning portion are formed on both protruding portions.

[0010] 4) A scaffolding board according to any one of 1) to 3) above, wherein the lower plate portion of the end frame member has two protruding portions protruding inward in the left-right direction from near both the front and rear ends, and a first lower positioning portion and a second lower positioning portion are formed on both protruding portions.

[0011] 5) A scaffolding board body, which is formed by arranging a single scaffolding board material having a top plate portion that is long in the left-right direction and in which a plurality of lightening holes whose hole edges are upwardly convex are formed, two side wall portions that extend downward from both front and rear edges of the top plate portion, and two lower wall portions that extend inward in the front-rear direction from the lower edges of both side walls, or by arranging two of the above scaffolding board materials in parallel front-rear and connected to each other; The scaffolding board has one or more reinforcing members attached at intervals in the length direction to the back side of the intermediate portion of the scaffolding board body, The reinforcing member has a base portion which is long in the front-rear direction and is joined to the lower surface of the lower wall portion so as to connect all the lower wall portions of the scaffolding board body, a positioning portion formed of a downwardly opening recess or a hole located at a position corresponding to an upper convex hole edge portion of the lightening hole is provided on a base portion of at least one of the reinforcing members; This scaffolding board is characterized in that, when two scaffolding boards are stacked with their undersides facing downwards, the upper convex hole edge of the lightening hole of the lower scaffolding board is accommodated in the positioning portion of the upper scaffolding board, thereby restricting at least the relative movement in the lengthwise direction of the two scaffolding boards and the relative movement in the widthwise direction of the two scaffolding boards.

[0012] 6) The scaffolding board of 5) above, wherein the positioning portion is a downwardly opening concave groove portion that is long in the front-to-rear direction and formed in the base portion of the reinforcing member.

[0013] 7) A scaffolding board body, which is formed by arranging a single scaffolding board material having a top board portion that is long in the left-right direction, two side wall portions extending downward from both front and rear edges of the top board portion, and two lower wall portions extending inward in the front-rear direction from the lower edges of both side walls, or by arranging a plurality of scaffolding board materials in parallel front-rear and connected to each other; The scaffolding board has two end frame members that are long in the front-rear direction and are attached to both the left and right ends of the scaffolding board body. The end frame member has an upper plate portion arranged and fixed to the upper surface of both left and right ends of the scaffold board body, A positioning portion consisting of an upper protrusion is provided on the upper plate of the end frame member, This scaffolding board is characterized in that, when two scaffolding boards are stacked with their back sides facing downwards, the positioning portion of the lower scaffolding board engages with the leading edges of the two lower wall portions of the scaffolding board material of the upper scaffolding board, thereby restricting the relative movement of the two scaffolding boards in the width direction.

[0014] 8) The end frame member further has a side plate portion extending downward from the outer edge of the upper plate portion in the left-right direction, and a lower plate portion extending inward in the left-right direction from the lower edge of the side plate portion, The positioning portion of the scaffolding board as defined in 7) above is configured so that when two scaffolding boards are stacked with their undersides facing downwards, the positioning portion of the lower scaffolding board engages with the leading edge of the lower board of the upper scaffolding board, thereby restricting the relative movement of the two scaffolding boards in the longitudinal direction.

[0015] 9) The upper plate portion has a protruding portion located laterally inward from the tip edge of the lower plate portion over its entire length when viewed from above, The scaffolding board of 8) above, wherein the positioning portion is an upper convex bar portion that is long in the front-to-rear direction and formed on the protruding portion of the upper board portion.

[0016] 10) A scaffolding board body, which is formed by arranging a single scaffolding board having a top board portion that is long in the left-right direction, two side wall portions extending downward from both front and rear edges of the top board portion, and two lower wall portions extending inward in the front-rear direction from the lower edges of both side walls, or by arranging two of the scaffolding boards in a parallel front-rear direction and connecting them to each other; The scaffolding board has a plurality of reinforcing members attached at intervals in the longitudinal direction to the rear side of the longitudinal middle portion of the scaffolding board body, Each reinforcing member has a base portion that is long in the front-rear direction and is joined to the lower surface of the lower wall portion so as to connect all the lower wall portions of the scaffolding board body, The plurality of reinforcing members include a pair of left and right reinforcing members located at equal distances from the center of the scaffold board body in the longitudinal direction, The base portions of the pair of left and right reinforcing members have a first positioning portion consisting of a downward convex portion formed near one of two pairs of diagonal portions of an imaginary square having the base portions as its two left and right sides and at a position point-symmetrical with respect to the center of the scaffolding board body, and a second positioning portion consisting of a downward opening concave portion or hole formed near the other pair of diagonal portions of the scaffolding board body and at a position point-symmetrical with respect to the center of the scaffolding board body, This scaffolding board is characterized in that, when two scaffolding boards are stacked with their back sides facing each other, a first positioning portion of the lower scaffolding board is engaged with a second positioning portion of the upper scaffolding board, and the second positioning portion of the lower scaffolding board is engaged with a first positioning portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the longitudinal and lateral directions. Effect of the Invention

[0017] In the scaffold boards of the inventions 1) to 4) above, the first and second upper positioning parts provided on the upper plate parts of the frame members at both ends and the first and second lower positioning parts provided on the lower plate parts of the frame members at both ends restrict the relative movement of the two scaffold boards in the length direction and width direction when the two scaffold boards are stacked with their back sides facing downwards. Moreover, with the above scaffold boards, the above effect can be obtained even if the length directions of the stacked scaffold boards are reversed left and right. In addition to the above effect, in the case of the scaffold board of the invention 2) above, the relative movement of the two scaffold boards in the length direction and width direction when the two scaffold boards are stacked with their back sides facing each other is restricted. In the scaffolding boards of the inventions 5) to 6) above, the positioning portion provided on the base portion of the reinforcing member restricts at least the relative movement in the lengthwise direction of the two scaffolding boards when they are stacked with their undersides facing downwards, out of the relative movement in the lengthwise direction and the relative movement in the widthwise direction of the two scaffolding boards. In the scaffolding boards of the inventions 7) to 9) above, the positioning portions provided on the upper plate portions of the two end frame members restrict the relative movement in the width direction (and the relative movement in the length direction) of the two scaffolding boards when they are stacked with their undersides facing downwards. In addition, in the scaffolding board of the invention 10) above, the first and second positioning portions provided on the base portions of the pair of left and right reinforcing members restrict the relative movement of the two scaffolding boards in the longitudinal and lateral directions when the two scaffolding boards are stacked with their back surfaces facing each other. The above-mentioned structure and its action are not disclosed or suggested in prior art documents, including Patent Document 1. As described above, according to the scaffolding board of the present invention, by adding a simple structure to conventional scaffolding boards, it is possible to reliably prevent misalignment when stacked one on top of the other. [Brief description of the drawings]

[0018] [Figure 1] 1A and 1B are diagrams showing a state in which a scaffolding board according to a first embodiment of the present invention is set up on a temporary scaffolding, where (a) is a plan view and (b) is a front view. [Diagram 2] (a) is a plan view of the scaffolding board, (b) is a front view of the scaffolding board, and (c) is a bottom view of the scaffolding board. [Diagram 3] 1(a) is a side view of the scaffolding board, and FIG. 1(b) is an enlarged side view of the scaffolding board with the middle part omitted. [Figure 4] FIG. 2 is an enlarged plan view of the scaffolding board with the middle portion omitted. [Diagram 5] 1A is an enlarged front view of the left end of the scaffolding board, and FIG. 1B is an enlarged front view of the right end of the scaffolding board. [Figure 6] FIG. 2 is an enlarged bottom view of the scaffolding board with the middle portion omitted. [Figure 7] FIG. 2 is an enlarged bottom view of the central portion of the scaffolding board along its length. [Figure 8] 2(c) is a vertical cross-sectional view taken along line VIII-VIII in FIG. 2(c), and FIG. 2(b) is an enlarged view of the right half of FIG. 2(a). [Figure 9] FIG. 9 is a partially enlarged vertical cross-sectional view taken along line IX-IX in FIG. 8. [Figure 10] (a) is a side view of the scaffolding board material used in the same scaffolding board, and (b) is an enlarged view of the bb portion of (a). [Figure 11] 1 shows a modified example of a scaffolding board, where (a) is a side view of the scaffolding board, and (b) is an enlarged view of the bb portion of (a). [Figure 12] FIG. 2 is a front view showing a state in which a plurality of the scaffolding boards are stacked. [Figure 13] FIG. 2 is an enlarged front view showing a state in which a plurality of the scaffolding boards are stacked together, with the middle portion omitted. [Figure 14] FIG. 2 is an enlarged side view showing a state in which a plurality of the scaffolding boards are stacked together, with the middle portion omitted. [Figure 15] 10 is a vertical cross-sectional view showing a state in which a plurality of the scaffolding boards are stacked, taken at a cutting position corresponding to FIG. 9. FIG. [Figure 16] 11 shows a scaffolding board according to a second embodiment of the present invention, where (a) is a plan view, (b) is a front view, and (c) is a bottom view. [Figure 17] 1(a) is a side view of the scaffolding board, and FIG. 1(b) is an enlarged side view of the scaffolding board with the middle part omitted. [Figure 18] FIG. 2 is an enlarged plan view of the scaffolding board with the middle portion omitted. [Figure 19] 1A is an enlarged front view of the left end of the scaffolding board, and FIG. 1B is an enlarged front view of the right end of the scaffolding board. [Figure 20] This is an enlarged bottom view showing both ends of the scaffolding board with the middle omitted. [Figure 21] FIG. 2 is an enlarged bottom view showing the left and right reinforcing members of the scaffolding board with the middle omitted. [Figure 22] 16(a) is a vertical cross-sectional view taken along line XXII-XXII in FIG. 16(c), (b) is an enlarged view of the right half of (a), and (c) is an enlarged view of the left half of (a). [Figure 23] 22(a) is a vertical cross-sectional view taken along line aa in FIG. 22(b), and (b) is a vertical cross-sectional view taken along line bb in FIG. 22(c). [Figure 24] FIG. 2 is an enlarged front view showing a state in which a plurality of the scaffolding boards are stacked together, with the middle portion omitted. [Diagram 25] FIG. 2 is an enlarged side view showing a state in which a plurality of the scaffolding boards are stacked together, with the middle portion omitted. [Figure 26] 23 is a vertical cross-sectional view showing a state in which a plurality of the scaffolding boards are stacked, taken at a cutting position corresponding to FIG. 22. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] A scaffolding board according to an embodiment of the present invention will be described below with reference to Figs. In the following description, the bottom of Figures 1(a), 2(a), 4, 16(a) and 18 will be referred to as the "front" and the top of Figures 1(a), 2(a), 4, 16(a) and 18 will be referred to as the "rear", and left and right refer to the left and right when viewed from the front (for example, the left and right of Figures 1(b), 2(b), 12, 13, 16(b) and 24).

[0020] <First embodiment> 1 to 15 show a scaffolding board according to a first embodiment of the present invention. As shown in Fig. 1, in the temporary scaffolding, a pair of front and rear support posts (C1) are arranged at a predetermined interval in the left-right direction, and a fabric material (C2) is horizontally stretched and secured to each pair of support posts (C1). The scaffolding boards (1) (floor-attached fabric frames) of the present invention are then erected on each of the two parallel fabric materials (C2) adjacent to each other on the left and right to form a work floor.

[0021] 2, 3, etc. show the overall configuration of a scaffolding board (1) according to a first embodiment of the present invention. The illustrated scaffolding board (1) includes a scaffolding board main body (2) long in the left-right direction, two end frame members (3) long in the front-rear direction attached to both left and right ends of the scaffolding board main body (2), four hanging fittings (4A) (4B) attached to both left and right ends of the scaffolding board main body (2) at intervals in the front-rear direction and hooked to a fabric material (C2), and three reinforcing members (5) attached to the back side of the middle part of the length of the scaffolding board main body (2) at intervals in the length direction. The scaffolding board body (2) is composed of two scaffolding boards (20) arranged in parallel from front to back and connected to each other. The scaffolding board body may be composed of a single scaffolding board (20).

[0022] Each scaffolding board (20) has a top board portion (21) that is long in the left-right direction, two side wall portions (22) extending downward from both the front and rear edges of the top board portion (21), two lower wall portions (23) extending inward in the front-to-rear direction from the lower edges of both side wall portions (22), and two rising wall portions (24) extending upward from the tip edges of both lower wall portions (23). This scaffolding plank (20) is formed by forming (more specifically, roll forming, etc.) a high-tensile steel plate. The high-tensile steel plate used as the forming material of the scaffolding plank (20) preferably has a tensile strength of 500 MPa or more. The plate thickness of the high-tensile steel plate used as the forming material of the scaffolding plank (20) is preferably 1 mm or less, and more preferably 0.8 mm or less. By using a high-tensile steel plate having the above plate thickness, it is possible to significantly reduce the weight of the scaffolding plank (20).

[0023] The top plate portion (21) of the scaffolding board material (20) constitutes the tread surface of the scaffolding board (1) and is in the form of a strip having a predetermined length and width. The length and width of the top plate portion (21) are appropriately set according to the size of the temporary scaffolding to be installed. The top plate portion (21) is formed with a plurality of upper lightening holes (211). The presence of these upper lightening holes (211) reduces the weight of the scaffolding board material (20), and thus reduces the weight of the entire scaffolding board (1). In this embodiment, the top plate portion (21) is formed with three upper grooved portions (212) spaced apart in the width direction, each of which extends over the entire length of the top plate portion (21) and has a concave upper surface. More specifically, the three upper grooved portions (212) have a generally V-shaped cross section and are formed in the center of the front-to-rear width of the top plate portion (21) and in portions near both front and rear edges. The formation of the upper grooved portions (212) increases the strength of the top plate portion (21) against bending, twisting, and the like. The number of upper grooved portions is not limited to three, and may be one, two, four or more. In the scaffolding board (1) of this embodiment, the upper lightening holes (211) are formed in the flat portion of the top plate portion (21) excluding the upper groove portion (212). More specifically, the upper lightening holes (211) are circular, and are formed in a number of rows at a predetermined interval in the left-right direction in the flat portion between the front and rear outer upper groove portions (212) of the top plate portion (21) and the front and rear edges close thereto, and are formed in a number of rows at a predetermined interval in the left-right direction in the flat portion between the front and rear outer upper groove portions (212) of the top plate portion (21) and the width center upper groove portion (212) so that the two rows are shifted left-right and arranged in a staggered manner. The upper lightening holes (211) are formed by embossing the top plate portion (21) in an upward convex shape (approximately a truncated cone shape) and punching out the top wall portion of the upward convex portion formed thereby. These upper cutout holes (211) function to reduce the weight of the scaffolding board (20) and can also function as drainage holes for the top plate portion (21). The upper convex hole edge portion (211a) around the upper cutout holes (211) can function as an anti-slip portion. The shape, arrangement, number, etc. of the upper cutout holes are not limited to the above embodiment and can be changed as appropriate.

[0024] The front and rear side walls 22 of the scaffolding plank 20, together with the bottom wall 23, form the beams of the scaffolding plank 20. The height of the side walls 22 is usually 40 to 50 mm. A side groove portion (221) having a concave outer surface is formed along the entire length of each of the front and rear side walls (22) at the middle of the vertical width. The presence of this side groove portion (221) increases the strength of the side wall portion (22) against bending, twisting, etc., and thus increases the strength of the entire scaffolding board material (20) against bending, twisting, etc. As shown in detail in Fig. 10, the scaffolding plank (20) of this embodiment has a side groove (221) having a vertical groove bottom (221a) and two tapered groove side portions (221b) located on both the upper and lower sides of the groove bottom (221a) and inclined so that the groove width gradually widens toward the outside. If the side groove (221) is in the above-mentioned form, there are no places where the bending angle of the high-tensile steel plate is small (all bending points are larger than 90°). Therefore, even if the plate thickness of the high-tensile steel plate used is reduced, the occurrence of molding defects such as cracks is suppressed, and a scaffolding plank (20) with excellent strength is obtained. As will be described later, the mounting bases (41) of the hanging fittings (4A) and (4B) are attached to the side wall portions (22) of the scaffolding board (20). By forming the side grooved portions (221) in the above-described form, the mounting strength of the hanging fittings (4A) and (4B) is also increased. As shown in the figure, a plurality of side-thinning holes 222 are formed at intervals in the length direction in the side wall portion 22 of the scaffolding board 20. The presence of these side-thinning holes 222 further reduces the weight of the scaffolding board 20, and thus the entire scaffolding board 1 is further lightened. In the case of the scaffolding board 1 shown in the figure, the side-thinning holes 222 are circular, and a large number of them are formed at predetermined intervals in the left-right direction in the groove bottom surface portion 221a of the side groove-shaped portion 221. If the side-thinning holes 222 are formed at the groove bottom surface portion 221a of the side groove-shaped portion 221 in this way, the drilling process is easy, and the strength of the side wall portion 22 is prevented from being reduced by the side-thinning holes 222. The shape, arrangement, number, etc. of the side-thinning holes are not limited to the above embodiment and can be changed as appropriate. Also, the side lightening holes may be omitted.

[0025] The two lower wall portions (23) at the front and rear of the scaffolding plank (20), together with the side wall portions (22), form beam portions of the scaffolding plank (20). The rising wall portion (24) extending upward from the tip edge of the lower wall portion (23) may be formed vertically upward as shown in the figure, or may be inclined outward or inward in the front-rear direction.

[0026] In the above scaffolding plank (20), all bending points of the high tensile steel plate are given a radius (see FIG. 10(b) etc.). The radius of curvature of the bending points is preferably 2 mm or more. With the above configuration, even if a high tensile steel plate with a small plate thickness is used as the molding material for the scaffolding plank (20), the occurrence of molding defects such as cracks that accompany the molding process is suppressed, and a lightweight, high-strength scaffolding plank (20) can be reliably obtained.

[0027] Fig. 11 shows a modified example of the scaffolding board of the present invention. In the scaffolding board (20X) of Fig. 11, the upper end edges of the two front and rear rising wall portions (24) are bent outward in the front-rear direction to form outer bent edges (25). The outer bent edges (25) have an arc-shaped cross section. When a worker holds a scaffolding board by hand during transportation, erection, or removal, his or her fingers may get caught on the upper end edges of the rising walls of the scaffolding board. However, if the outer bent edges (25) are formed as in the above-mentioned scaffolding board (20X), it becomes easier to hold and there is no risk of injury to the fingers.

[0028] The left and right end frame members (3) are attached to both left and right ends (short sides) of the scaffolding board main body (2) and form the cross rails of the scaffolding board main body (2). In the case of the scaffolding board (1) of this embodiment, the end frame member (3) is attached across the ends of the two scaffolding boards (20) constituting the scaffolding board body (2), and also has the function of connecting the two scaffolding boards (20). The two scaffolding boards (20) are connected so as to leave a predetermined gap between them. The end frame member (3) has an upper plate portion (31) which is positioned and fixed to the upper surfaces of each of the left and right ends of the scaffolding board main body (2), a side plate portion (32) which extends downward from the left and right outer edges of the upper plate portion (31), and a lower plate portion (33) which extends inward in the left and right direction from the lower edge of the side plate portion (32). The upper plate portion (31) is a strip extending in the front-rear direction, and one side portion in the width direction (approximately half of the width direction) is overlapped with the end portion of the upper surface of the scaffolding board main body (2), i.e., the end portion (short side portion) of the upper surface of the top plate portion (21) of the two front and rear scaffolding board materials (20), and is fixedly attached to the end portion by a joining means such as welding or rivets. The other side portion in the width direction of the upper plate portion (31) is configured to protrude outward in the left-right direction from the end portion of the scaffolding board main body (2). The upper portion of the side plate portion (32) extends diagonally downward from the tip edge of the upper plate portion (31) toward the inside in the left-right direction, and the remaining portion extends vertically downward so as to roughly follow the end face of the scaffolding board material (20). The lower plate portion (33) extends horizontally inward in the left-right direction from the lower edge of the side plate portion (32). The width of the lower plate portion (33) is approximately equal to the width of the portion of the upper plate portion (31) that is attached to the upper surface of the scaffold board body (2).

[0029] Since a large number of scaffolding boards (1) are used in temporary scaffolding, they are generally handled in a state where multiple scaffolding boards (1) are stacked one on top of the other when transporting and storing. Also, when multiple scaffolding boards (1) are stacked one on top of the other, it is generally the case that only the bottom scaffolding board (1) has its backside facing up, in which case the bottom scaffolding board (1) and the second-lowest scaffolding board (1) are stacked so that their backsides face each other. Therefore, if the scaffolding boards (1) are misaligned horizontally when stacked one on top of the other, this may cause problems during transportation or storage. In the case of the scaffolding board (1) of this embodiment, by providing a positioning means on the end frame members (3), it is possible to reliably prevent horizontal misalignment when multiple scaffolding boards are stacked one on top of the other. More specifically, in the scaffolding board (1) of this embodiment, as the above-mentioned positioning means, a first upper positioning portion (35a) consisting of an upper convex portion formed on the upper plate portions (31) of the two end frame members (3) near one of two pairs of diagonal portions of an imaginary square having the upper plate portions (31) as its left and right sides and at a position point-symmetrical about the center of the scaffolding board main body (2), and a second upper positioning portion (35b) consisting of an upper opening recess (or hole) formed near the other pair of diagonal portions of the scaffolding board main body (2) and at a position point-symmetrical about the center of the scaffolding board main body (2), are provided. In addition, the lower plate portions (33) of the two end frame members (3) are provided with a first lower positioning portion (36a) which is formed at a location corresponding to the first upper positioning portion (35a) when viewed from above and which consists of a downwardly opening recess (or hole) that can fit with the upper convex portion constituting the first upper positioning portion (35a), and a second lower positioning portion (36b) which is formed at a location corresponding to the second upper positioning portion (35b) when viewed from above and which consists of a downwardly opening recess (or hole) that can fit with the upper convex portion that constitutes the second upper positioning portion (35b). In this embodiment, two overhanging portions (311) are formed on the upper plate portion (31) of each of the left and right end frame members (3) that overhang inward in the left-right direction from the vicinity of both front and rear ends, and a first upper positioning portion (35a) and a second upper positioning portion (35b) are formed on these overhanging portions (311). The overhanging portions (311) are substantially rectangular in shape and are formed so as to be located above the upper groove-shaped portions (212) on both the front and rear outer sides of the top plate portion (21). With the above configuration, the formation of the first upper positioning portion (35a) and the second upper positioning portion (35b) prevents the width of the upper plate portion (31) of the end frame member (3) from increasing, which in turn contributes to reducing the weight of the scaffolding board (1). In addition, two overhanging parts (331) are formed on the lower plate part (33) of each of the left and right end frame members (3) from the vicinity of both front and rear ends, and the first lower positioning part (36a) and the second lower positioning part (36b) are formed on these overhanging parts (331). The overhanging parts (331) are substantially rectangular and are formed so as to be located at positions corresponding to the two overhanging parts (311) of the upper plate part (31), that is, below the upper grooved parts (212) on both the front and rear outer sides of the top plate part (21). According to the above configuration, the formation of the first lower positioning part (36a) and the second lower positioning part (36b) prevents the width of the lower plate part (33) of the end frame member (3) from increasing, which can contribute to the weight reduction of the scaffolding board (1). The upper convex portion constituting the first upper positioning portion (35a) and the lower convex portion constituting the second lower positioning portion (36b) have the same shape and size except for the up-down direction. Also, the upper opening recess constituting the second upper positioning portion (35b) and the lower opening recess constituting the first lower positioning portion (36a) have the same shape and size except for the up-down direction. In this embodiment, the upper convex portion (35a) and the lower convex portion (36b) are configured by protrusions having a generally truncated cone shape, and the upper opening recess (35b) and the lower opening recess (36a) are configured by recesses having a generally inverted truncated cone shape. Note that the upper convex portion, the lower convex portion, the upper opening recess, and the lower opening recess are not limited to the forms shown in the drawings. Also, the upper opening recess and the lower opening recess may be configured by through holes.

[0030] Figures 12 to 15 show three scaffolding boards (1) of this embodiment stacked one on top of the other, with the bottom scaffolding board (1) and the middle (second from the bottom) scaffolding board (1) stacked with their backsides facing each other, and the middle scaffolding board (1) and the top scaffolding board (1) both stacked with their backsides facing downwards (the same applies to Figures 24 to 26 which show the stacked state of scaffolding boards (1X) of the second embodiment described below). In the above-mentioned stacked state, the middle scaffolding board (1) and the top scaffolding board (1) are positioned as follows: The first upper positioning portion (35a) of the middle scaffolding board (1) is fitted into the first lower positioning portion (36a) of the top scaffolding board (1), and the second upper positioning portion (35b) of the middle scaffolding board (1) is fitted into the second lower positioning portion (36b) of the top scaffolding board (1), thereby restricting the relative movement of both scaffolding boards (1) in the length direction and width direction (see Figs. 13 and 14). Moreover, in the case of the above-mentioned positioning means, the two first upper positioning portions (35a), second upper positioning portions (35b), first lower positioning portions (36a), and second lower positioning portions (36b) are formed at positions that are point-symmetrical about the center of the scaffolding board main body (2). Therefore, even if the longitudinal orientation of the stacked scaffolding boards (1) is reversed left to right, they will fit together in the same manner as described above, and the relative movement of the two scaffolding boards (1) in the longitudinal and width directions is restricted. In addition, the middle scaffolding board (1) and the lowest scaffolding board (1) stacked with their backsides facing each other are positioned as follows: The first lower positioning portion (36a) of the lowest scaffolding board (1) is fitted with the second lower positioning portion (36b) of the middle scaffolding board (1), and the second lower positioning portion (36b) of the lowest scaffolding board (1) is fitted with the first lower positioning portion (36a) of the middle scaffolding board (1), thereby restricting the relative movement of both scaffolding boards (1) in the length direction and the width direction (see Figs. 13 and 14). Even if the length direction orientations of the scaffolding boards (1) stacked with their backsides facing each other are reversed, they are fitted with each other in the same manner as above, and the relative movement of both scaffolding boards (1) in the length direction and the width direction is restricted.

[0031] The hanging fittings (4A) (4B) are used to erect the scaffolding board (1) on the fabric material (C2) and include a hanging fitting main body (40) having an attachment base (41) to be attached to the scaffolding board main body (2) and a hook portion (42) to be hung on the fabric material (C2), and a locking member (44) that is attached to the hook portion (42) so as to be freely movable up and down and prevents the hook portion (42) from being inadvertently detached from the fabric material (C2).

[0032] The fastening hardware body (40) is formed from a metal plate such as a steel plate, and has an attachment base portion (41) and a hook portion (42) which are integrally provided via intermediate connecting portions (43A), (43B). The mounting base (41) is a substantially vertical plate-like member long in the left-right direction. In the middle of the length of the mounting base (41), two notches (411) are provided that are cut into a substantially arc-shaped shape from both the upper and lower edges. The inner left-right ends of the mounting base (41) are formed into a convex arc-shaped shape. The mounting base (41) is attached to both left and right end portions of the inner surface of the two side walls (22) located at the front and rear ends of the scaffolding board body (2) among the front and rear side walls (22) of the two scaffolding boards (20). More specifically, the mounting base (41) of the fastening metal body (40) is overlapped on the inner surface of the groove bottom surface (221a) of the side groove-shaped portion (221) at each of the left and right ends of the side wall portion (22), and is fixedly attached to the groove bottom surface (221a) by a joining means such as rivets or welding. The two hanging fittings (4A) at one diagonal position (the front left and rear right positions in the figure) among the four hanging fittings (4A) (4B) have a vertically-shaped intermediate connector (43A) that extends in an extended manner from the outer left-right end of the mounting base (41). On the other hand, the two hanging fittings (4B) at the other diagonal position (the rear left and front right positions in the figure) among the four hanging fittings (4A) (4B) have a vertically-shaped bent intermediate connector (43B) that extends in a crank-like manner from the outer left-right end of the mounting base (41) inward in the front-rear direction. When multiple scaffolding boards (1) are erected in series in the left-to-right direction in a temporary scaffold, two hanging fittings (4A) (4B) at opposite ends of two scaffolding boards (1) are each hung to one fabric material (C2). If the connecting parts (43A) (43B) of the four hanging fittings (4A) (4B) are configured as described above, the two scaffolding boards (1) can be erected in an orderly series without being shifted in the front-to-back direction. The hook portion (42) is generally C-shaped and opens downward when viewed from the front. The middle portion (421) of the lower edge of the hook portion (42) is generally semicircular so as to be able to engage with the upper portion of the outer surface of the fabric material (C2). The base end portion (422) of the lower edge of the hook portion (42) extends obliquely upward toward the tip (outward in the left-right direction). Moreover, the tip portion (423) of the lower edge of the hook portion (42) extends obliquely downward toward the tip. The upper edge of the hook portion (42) is generally trapezoidal with both left and right side portions (424), (425) inclined. When multiple scaffolding boards (1) are stacked with their back sides facing downwards, the upper parts of the hook portions (42) of the fastening fittings (4A) and (4B) of the lower scaffolding board (1) fit into the lower parts of the hook portions (42) of the fastening fittings (4A) and (4B) of the upper scaffolding board (1) (see FIG. 13). According to the above configuration, when multiple scaffolding boards (1) are stacked one on top of the other, there is no need to shift the fastening fittings (4A) and (4B) in the front-to-back width directions so that they do not interfere with each other, and they can be stacked in an orderly manner. In addition, when multiple scaffolding boards (1) are stacked with their back sides facing downward, the left and right side portions (424) (425) of the upper edge of the hook portion (42) of the fastening fittings (4A) (4B) of the lower scaffolding board (1) can engage with the base end portion (422) and the tip portion (423) of the lower edge of the hook portion (42) of the fastening fittings (4A) (4B) of the upper scaffolding board (1) (see FIG. 13). According to the above configuration, the relative movement in the length direction of multiple scaffolding boards (1) stacked vertically is restricted by the engagement between the above-mentioned portions (422), (423), (424), (425) of the hook portion (42), so that the scaffolding boards (1) can be prevented from shifting during transportation or storage.

[0033] The locking member (44) is in the form of a vertical plate having two arc-shaped insertion holes (441), one at the top and one at the bottom, and is attached to the base end portion of the hook portion (42) by means of a mounting pin (45) (e.g., a rivet) inserted into these insertion holes (441). When the hook portion (42) is not hooked to the fabric material (C2), the locking member (44) is lowered by its own weight and is in the locked position. When the hook portion (42) is brought close to the fabric material (C2) from above to hook the hook fittings (4A) and (4B) to the fabric material (C2), the lower end portion (442) of the locking member (44) is pressed against the fabric material (C2), and the locking member (44) is moved upward in a slight arc along the shape of the insertion hole (441), and the lower end portion (442) of the locking member (44) is disengaged from the upper position of the fabric material (C2). When the hook portion (42) is lowered in this state, the middle portion (421) of the lower edge of the hook portion (42) is engaged with the upper portion of the outer surface of the fabric material (C2), and the hook portion (42) is hooked to the fabric material (C2). When the hook portion (42) is hooked to the fabric material (C2), no upward external force acts on the locking member (44), so that the locking member (44) descends to the locked position by its own weight. As a result, the lower end portion (442) of the locking member (44) is engaged with the lower portion of the outer surface of the fabric material (C2), so there is no risk of the hooking metal fittings (4A) and (4B) accidentally coming off the fabric material (C2). When removing the fastening members (4A) and (4B) from the fabric material (C2), the locked state can be released by pushing the locking member (44) upward with a finger.

[0034] In the scaffold board (1) of this embodiment, the locking members (44) of the four fastening fittings (4A) and (4B) are all attached to the inner surface of the hook portion (42) in the front-rear direction (see Figs. 3 to 6, etc.). According to the above configuration, when a plurality of scaffold boards (1) are stacked with their back surfaces facing downward, the lower end portions (442) of the locking members (44) of the two front and rear fastening fittings (4A) and (4B) at the left and right ends of the upper scaffold board (1) engage with the upper portions of the inner surface of the hook portion (42) of the two front and rear fastening fittings (4A) and (4B) at the left and right ends of the lower scaffold board (1), thereby restricting the relative movement of both scaffold boards (1) in the width direction (see Figs. 13 and 14). Note that, contrary to the above configuration, the locking members (44) of all the fastening fittings (4A) and (4B) may be attached to the outer surface of the hook portion (42) in the front-rear direction, and in that case, the same effect as above is also achieved.

[0035] The reinforcing member (5) is provided on the back side of the long scaffolding board main body (2) at the midpoint of its length, and functions as a cross-rail portion for reinforcing strength against bending, twisting, etc. The number of reinforcing members to be installed is not limited to three as in the illustrated scaffolding board (1), and may be one, two, four or more. The reinforcing member (5) in this embodiment has a base portion (51) which is long in the fore-and-aft direction and is joined to the underside of all (here, four) lower wall portions (23) of the scaffolding board main body (2) so as to connect the lower wall portions (23), and one or more (here, two) rising portions (52) which extend upward from the base portion (51) and have their upper ends abutted (or adjacent) to the underside of the top board portion (21) of each scaffolding board material (20). The reinforcing member 5 is formed, for example, by punching a steel plate or the like into a predetermined shape and then subjecting it to a predetermined bending process. The base portion (51) is a strip-like plate having a length close to the front-to-rear width of the scaffolding board main body (2). In the base portion (51), two front and rear intermediate portions (51a) located between the lower wall portions (23) of the two scaffolding boards (20) are slightly narrower than the other portions, i.e., the front and rear end portions and the lengthwise central portion (51b). The wide front and rear ends and the longitudinal center portion (51b) of the base portion (51) are joined to the lower surfaces of the two lower wall portions (23) of the two scaffolding planks (20) by a joining means such as welding. The rising portion 52 extends upward from one edge of a narrow intermediate portion 51a of the base portion 51. The other edge of the narrow intermediate portion 51a is bent upward, thereby increasing the rigidity of the base portion 51. The rising portion (52) is a vertical plate having an isosceles trapezoidal shape when viewed from the left and right. If the rising portion (52) is shaped like an isosceles trapezoid as shown in the figure, the weight of the reinforcing member (5) can be reduced so as not to impair the lightweight design of the scaffolding board (1), while reliably compensating for the strength of the scaffolding board material (20) against bending, twisting, etc. In addition, a plurality of (here, two, front and rear) lightening holes (521) are formed in the rising portion (52) except for the four sides and the longitudinal center portion. In the case of the illustrated reinforcing member (5), the two lightening holes (521) are formed in an axisymmetric uneasosceles trapezoidal shape. By forming the lightening holes (521) in the above-mentioned portions of the rising portion (52), the weight of the reinforcing member (5) can be further reduced without compromising the rigidity of the rising portion (52). The upper edge of the rising portion (52) is bent horizontally so as to overhang to the opposite side of the base portion (51), and this portion constitutes the upper overhanging edge portion (53). The upper surface of the upper overhanging edge portion (53) is abutted against the underside of the top plate portion (21) of the scaffolding board material (20). The upper overhanging edge portion (53) is usually joined to the underside of the top plate portion (21) by a joining means such as welding. In the case of the illustrated reinforcing member (5), the upper end portion of the center of the front-to-rear length of the rising portion (52) is cut out so as not to interfere with the upper groove portion (212) at the width center position of the top plate portion (21) of the scaffolding board material (20), and therefore the upper overhanging edge portion (53) is divided into two parts, front and rear.

[0036] The base portion (51) of the reinforcing member (5) is provided with a positioning portion (54) consisting of a downwardly opening recess (or hole) located at a position corresponding to the upwardly protruding hole edge portion (211a) of a predetermined upper lightening hole (211) of the top plate portion (21) of the scaffolding board material (20). More specifically, the positioning portion (54) consists of a downwardly opening recessed groove portion that is long in the front-rear direction and formed in the narrow longitudinal intermediate portion (51a) of the base portion (51). When two scaffolding boards (1) are stacked with their back sides facing downward, the positioning portion (54) of the upper scaffolding board (1) accommodates the upper convex hole edge portion (211a) of the lower scaffolding board (1), restricting the relative movement of both scaffolding boards (1) in the longitudinal direction (see FIG. 15, etc.). In the case of the illustrated scaffolding board (1), the two front and rear positioning portions (54) of the reinforcing member (5) each accommodate two front and rear upper convex hole edge portions (211a) formed at a predetermined length position of the top board portion (21) of the two scaffolding boards (20). In addition, by changing the length or positioning of the downward opening groove portion that constitutes the positioning portion (54) so ​​that it engages with the two upper convex hole edges (211a) on the outside in the fore-and-aft direction and / or the two upper convex hole edges (211a) on the inside of the four upper convex hole edges (211a) that are accommodated, the relative movement in the width direction of the two scaffolding boards (1) when stacked can also be regulated. In the case of the scaffolding board (1) of this embodiment, the two end frame members (3) are also provided with the positioning means (35a), (35b), (36a), and (36b) described above, but the positioning portion (54) of the reinforcing member (5) allows smoother and more reliable positioning when multiple scaffolding boards (1) are stacked one on top of the other. However, it is also possible to provide a positioning means on only one of the end frame members (3) and the reinforcing member (5).

[0037] According to the scaffolding board (1) of the first embodiment, the first and second upper positioning parts (35a) and (35b) provided on the upper plate parts (31) of the frame members (3) at both ends and the first and second lower positioning parts (36a) and (36b) provided on the lower plate parts (33) of the frame members (3) at both ends restrict the relative movement of the two scaffolding boards (1) in the length direction and width direction when the two scaffolding boards (1) are stacked with their back faces facing downward. Moreover, according to the scaffolding board (1) described above, the above effect is achieved even when the length direction of the stacked scaffolding boards (1) is reversed to the left and right. Moreover, according to the scaffolding board (1) of this embodiment, the relative movement of the two scaffolding boards (1) in the length direction and width direction when the two scaffolding boards (1) are stacked with their back faces facing each other can also be restricted. Furthermore, according to the scaffolding boards (1) of this embodiment, when two scaffolding boards (1) are stacked with their back sides facing downwards, the positioning portion (54) provided on the reinforcing member (5) of the upper scaffolding board (1) accommodates the upper convex hole edge portion (211a) of the lower scaffolding board (1), thereby restricting the relative movement of the two scaffolding boards (1) in the longitudinal direction, so that the positioning of the scaffolding boards (1) can be performed more smoothly and reliably.

[0038] <Second embodiment> 16 to 26 show a scaffolding board according to the second embodiment of the present invention. The scaffolding plank (1X) of this embodiment is substantially the same as the scaffolding plank (1) of the first embodiment shown in Figs. 1 to 16, except for the following points.

[0039] In the scaffolding board (1X) of the second embodiment, the upper plate parts (31) of the two end frame members (3X) on the left and right are each provided with a positioning part (37) consisting of an upward protrusion. Also, the lower plate parts (33) of the end frame members (3X) are not provided with a positioning part as in the first embodiment. The positioning portion (37) is configured so that when two scaffolding boards (1X) are stacked with their backsides facing downwards, the positioning portion (37) of the lower scaffolding board (1X) engages with the leading edges of the two lower wall portions (23) of the scaffolding board material (20) of the upper scaffolding board (1X), thereby restricting the relative movement of both scaffolding boards (1X) in the width direction. Also, the positioning portion (37) is configured so that when two scaffolding boards (1X) are stacked with their backsides facing downwards, the positioning portion (37) of the lower scaffolding board (1X) engages with the leading edges of the lower board portion (33) of the upper scaffolding board (1X), thereby restricting the relative movement of both scaffolding boards (1X) in the length direction. More specifically, the upper plate portion (31) of the end frame members (3X) has a protruding portion (311X) located laterally inward from the leading edge of the lower plate portion (33) over its entire length when viewed from above. The protruding portion (311X) is formed with an upper protruding strip that is long in the front-rear direction, and the upper protruding strip constitutes a positioning portion (37). In the case of the end frame member (3X) shown in the figure, the positioning portion (37) is composed of two upper protruding strips that are formed in series on the protruding portion (311X) with a slight gap between them in the front-rear direction. The two upper protruding strips (positioning portions (37)) are formed so as to be adjacent to the leading edges of the lower plate portions (33) of the two scaffolding planks (20) when viewed from above (see FIG. 19, etc.). Moreover, the two upper convex strips (positioning portions (37)) are formed so that their front and rear ends are adjacent to the leading edges of the two front and rear lower wall portions (23) of each of the two scaffolding boards (20) when viewed from above (see FIG. 17, etc.). The number of positioning portions consisting of the upper convex strips may be one or three or more depending on the number of scaffolding boards that make up the scaffolding board body. In addition, the positioning portion may be constituted by four or more upward protrusions formed at least at locations of the protrusion portion (311X) adjacent to the leading edges of the two front and rear lower wall portions (23) of each scaffolding board (20).

[0040] In the scaffolding board (1X) of this embodiment, of the three reinforcing members provided on the back side of the middle part of the length of the scaffolding board main body (2), the reinforcing member (5) located in the center of the length has the same structure as the three reinforcing members (5) of the scaffolding board of the first embodiment. On the other hand, the two reinforcing members (5X) on both the left and right sides are positioned at equal distances from the center in the longitudinal direction of the scaffolding board main body (2) and form a pair. The base parts (51) of the pair of reinforcing members (5X) on the left and right sides have a first positioning part (55a) consisting of a downward convex part formed near one of two pairs of diagonal parts of an imaginary square having the base parts (51) as its two left and right sides and at a position point-symmetrical with respect to the center of the scaffolding board main body (2), and a second positioning part (55b) consisting of a downward opening concave part (or hole) formed near the other pair of diagonal parts of the scaffolding board main body (2) and at a position point-symmetrical with respect to the center of the scaffolding board main body (2). Also, since these positioning portions (55a) and (55b) are formed at the above-mentioned locations of the base portion (51) (i.e., near both front and rear ends of the base portion (51)), the positioning portion (54) consisting of a downward-opening groove portion also formed in the base portion (51) is slightly shorter than the positioning portion (54) of the first embodiment. In this embodiment, the downward convex portion (55a) is configured by a protrusion having a substantially truncated cone shape, and the downward-opening recess (55b) is configured by a recess having a substantially inverted truncated cone shape. Note that the downward convex portion and the downward-opening recess are not limited to the forms shown in the drawings. Also, the downward-opening recess may be configured by a through hole. When two scaffolding boards (1X) are stacked with their back sides facing each other, the first positioning portion (55a) of the lower scaffolding board (1X) is fitted with the second positioning portion of the upper scaffolding board, and the second positioning portion (55b) of the lower scaffolding board (1X) is fitted with the first positioning portion (55a) of the upper scaffolding board, so that the relative movement of both scaffolding boards (1X) in the length direction and the width direction is restricted (see FIG. 26, etc.). In addition, the first positioning portion (55a) and the second positioning portion (55b) of the pair of left and right reinforcing members (5X) are formed in positions that are point symmetrical with respect to the center of the scaffolding board body (2), so that even if the longitudinal directions of the stacked scaffolding boards (1) are reversed, they are fitted with each other in the same manner as above, and the relative movement of both scaffolding boards (1) in the length direction and the width direction is restricted. [Industrial Applicability]

[0041] The present invention is preferably used as a metal scaffolding board (floor-attached cloth frame) that is installed on the cloth material of a work floor in a temporary scaffold to form the work floor. [Explanation of symbols]

[0042] (1)(1X):Scaffolding board (2): Scaffolding board body (20)(20X):Scaffolding boards (21): Top plate (211): Hole (211a): Upper convex hole edge of the lightening hole (22): Side wall (23):Lower wall part (3)(3X): End frame member (31): Upper plate (311)(311X): Projection (32): Side plate part (33):Lower plate part (331): Projection (35a): First upper positioning portion (upper convex portion) (35b): Second upper positioning portion (upper opening recess) (36a): First lower positioning portion (lower opening recess) (36b): Second lower positioning portion (lower convex portion) (37): Positioning portion (upper convex portion) (4A)(4B):Hanging hardware (5)(5X): Reinforcing member (51): Base part (54): Positioning portion (lower opening groove portion) (55a): First positioning portion (lower convex portion) (55b): Second positioning portion (lower opening recess)

Claims

1. A scaffolding board body is formed by arranging a single scaffolding board material having a top board portion that is long in the left-right direction, two side wall portions extending downward from both front and rear edges of the top board portion, and two lower wall portions extending inward in the front-rear direction from the lower edges of both side walls, or by arranging a plurality of scaffolding board materials in parallel front-rear and connected to each other; The scaffolding board has two end frame members that are long in the front-rear direction and are attached to both left and right ends of the scaffolding board body. The end frame member has an upper plate portion arranged and fixed to the upper surfaces of both left and right ends of the scaffolding board body, a side plate portion extending downward from the left and right outer edges of the upper plate portion, and a lower plate portion extending inward in the left and right direction from the lower edges of the side plate portion, The upper plate portions of the two end frame members have a first upper positioning portion consisting of an upper convex portion formed near one of two pairs of diagonal portions of an imaginary square having the upper plate portions as its two left and right sides and at a position point-symmetrical with respect to the center of the scaffolding board body, and a second upper positioning portion consisting of an upper opening recess or hole formed near the other pair of diagonal portions of the scaffolding board body and at a position point-symmetrical with respect to the center of the scaffolding board body, the lower plate portions of the two end frame members have a first lower positioning portion formed at a location corresponding to the first upper positioning portion and consisting of a downwardly opening recess or hole that can be fitted with an upper protrusion constituting the first upper positioning portion, and a second lower positioning portion formed at a location corresponding to the second upper positioning portion and consisting of a downward protrusion that can be fitted with an upwardly opening recess or hole that constitutes the second upper positioning portion, When two scaffolding boards are stacked with their undersides facing downwards, the first upper positioning portion of the lower scaffolding board is fitted into the first lower positioning portion of the upper scaffolding board, and the second upper positioning portion of the lower scaffolding board is fitted into the second lower positioning portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the lengthwise and widthwise directions; In addition, the upper convex portion constituting the first upper positioning portion and the lower convex portion constituting the second lower positioning portion, and the upper opening recess or hole constituting the second upper positioning portion and the lower opening recess or hole constituting the first lower positioning portion are each made to have the same shape and size except for the up and down orientations, This scaffolding board is characterized in that, when two scaffolding boards are stacked with their back surfaces facing each other, a first lower positioning portion of the lower scaffolding board is engaged with a second lower positioning portion of the upper scaffolding board, and the second lower positioning portion of the lower scaffolding board is engaged with a first lower positioning portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the longitudinal and transverse directions.

2. A scaffolding board as described in claim 1, wherein the upper plate portion of the end frame member has two protruding portions protruding inward in the left-right direction from near both front and rear ends, and a first upper positioning portion and a second upper positioning portion are formed on both protruding portions.

3. A scaffolding board as described in claim 1, wherein the lower plate portion of the end frame member has two protruding portions protruding inward in the left-right direction from near both front and rear ends, and a first lower positioning portion and a second lower positioning portion are formed on both protruding portions.

4. a scaffolding board body, which is arranged individually or in parallel front to back and connected to each other, and which has a top plate portion that is long in the left-right direction and in which a plurality of lightening holes with hole edges that are upwardly convex are formed, two side wall portions that extend downward from the front and rear edges of the top plate portion, and two lower wall portions that extend inward in the front-to-rear direction from the lower edges of the side wall portions; The scaffold board body is provided with one or more reinforcing members attached at intervals in the length direction to the back side of the longitudinal middle part of the scaffold board body, The reinforcing member has a base portion which is long in the front-rear direction and is joined to the lower surface of the lower wall portion so as to connect all the lower wall portions of the scaffolding board body, a positioning portion formed of a downwardly opening recess or a hole located at a position corresponding to an upper convex hole edge portion of the lightening hole is provided on a base portion of at least one of the reinforcing members; This scaffolding board is characterized in that, when two scaffolding boards are stacked with their undersides facing downwards, the upper convex hole edge of the lightening hole of the lower scaffolding board is received in the positioning portion of the upper scaffolding board, thereby restricting at least the relative movement in the length direction among the relative movement in the length direction and the width direction of the two scaffolding boards.

5. 5. The scaffolding board according to claim 4, wherein the positioning portion is a downwardly opening concave groove portion that is long in the front-rear direction and is formed in the base portion of the reinforcing member.

6. A scaffolding board body is formed by arranging a single scaffolding board material having a top board portion that is long in the left-right direction, two side wall portions extending downward from both front and rear edges of the top board portion, and two lower wall portions extending inward in the front-rear direction from the lower edges of both side walls, or by arranging a plurality of scaffolding board materials in parallel front-rear and connected to each other; The scaffolding board has two end frame members that are long in the front-rear direction and are attached to both left and right ends of the scaffolding board body. The end frame member has an upper plate portion arranged and fixed to the upper surface of both left and right ends of the scaffold board body, A positioning portion consisting of an upper protrusion is provided on the upper plate of the end frame member, This scaffolding board is characterized in that, when two scaffolding boards are stacked with their back sides facing downwards, the positioning portion of the lower scaffolding board engages with the leading edges of the two lower wall portions of the scaffolding board material of the upper scaffolding board, thereby restricting the relative movement of the two scaffolding boards in the width direction.

7. The end frame member further has a side plate portion extending downward from a left-right outer edge of the upper plate portion, and a lower plate portion extending inward in the left-right direction from a lower edge of the side plate portion, A scaffolding board as described in claim 6, wherein the positioning portion is configured so that when two scaffolding boards are stacked with their back sides facing downwards, the positioning portion of the lower scaffolding board engages with the leading edge of the lower board portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the longitudinal direction.

8. The upper plate portion has a protruding portion over its entire length, the protruding portion being located laterally inward from a tip edge of the lower plate portion when viewed from above, 8. A scaffolding board as claimed in claim 7, wherein the positioning portion comprises an upper convex strip portion which is long in the front-to-rear direction and formed on the protruding portion of the upper board portion.

9. A scaffolding board body is formed by arranging a single scaffolding board material having a top board portion that is long in the left-right direction, two side wall portions extending downward from both front and rear edges of the top board portion, and two lower wall portions extending inward in the front-rear direction from the lower edges of both side wall portions, or by arranging two of the scaffolding board materials in a parallel front-rear direction and connecting them to each other; The scaffolding board has a plurality of reinforcing members attached at intervals in the longitudinal direction to the rear side of the longitudinal middle portion of the scaffolding board body, Each reinforcing member has a base portion that is long in the front-rear direction and is joined to the lower surface of the lower wall portion so as to connect all the lower wall portions of the scaffolding board body, The plurality of reinforcing members include a pair of left and right reinforcing members located at equal distances from the center of the scaffold board body in the longitudinal direction, The base portions of the pair of left and right reinforcing members have a first positioning portion consisting of a downward convex portion formed near one of two pairs of diagonal portions of an imaginary square having the base portions as its two left and right sides and at a position point-symmetrical with respect to the center of the scaffolding board body, and a second positioning portion consisting of a downward opening concave portion or hole formed near the other pair of diagonal portions of the scaffolding board body and at a position point-symmetrical with respect to the center of the scaffolding board body, This scaffolding board is characterized in that, when two scaffolding boards are stacked with their back sides facing each other, a first positioning portion of the lower scaffolding board is engaged with a second positioning portion of the upper scaffolding board, and the second positioning portion of the lower scaffolding board is engaged with a first positioning portion of the upper scaffolding board, thereby restricting relative movement of the two scaffolding boards in the longitudinal and transverse directions.

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