Scaffold board fixture and scaffold system

Abstract

To reduce the number of steps which are generated above a scaffold board.SOLUTION: A scaffold board fixture 20 has: a pressing member 30 including a pressing plate 32 which has an opening 32V formed at the center and is bridged over a joint between scaffold boards bridged on a joist from above, and a bolt receiving part 34 which is fixed to the lower surface of the pressing plate 32 and extends downward, and is arranged in the joint; a bolt 40 where a shaft part 42 is inserted below the scaffold boards from the opening 32V, and a head part 44 is arranged so as to be brought into contact with the bolt receiving part 34; and an anchor member 50 including a female screw part 54 to which the bolt 40 is screwed, and a hook part 56 which is hooked to the joist from below.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a scaffolding plank fixing and a scaffolding system. [Background technology]

[0002] The following Patent Document 1 describes a scaffolding board fixing device for fixing a scaffolding board to an arm. In this scaffolding board fixing device, a bolt is screwed from above the scaffolding board into a nut fixed to a support plate arranged below the scaffolding board, thereby fixing the scaffolding board to the arm. At this time, the fixing force is increased by pressing the pressing plate with the bolt head. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-115304 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the scaffolding board fixing device of the above-mentioned Patent Document 1, the pressing plate is pressed by the bolt head, so a multi-stage protrusion is generated above the scaffolding board, which is a combination of the pressing plate and the bolt head. Such a protrusion may cause an obstacle to work on the scaffolding board.

[0005] In consideration of the above, an object of the present invention is to provide a scaffold board fastener and a scaffold system that can reduce the number of steps that occur above a scaffold board. [Means for solving the problem]

[0006] The scaffolding board fixing device of claim 1 comprises a pressure member having a pressure plate with an opening formed in the center and hung from above over a joint between scaffolding boards erected on floor joists, and a bolt receiving portion fixed to the underside of the pressure plate, extending downward and placed in the joint, an anchor member having a bolt whose shaft portion is inserted below the scaffolding board through the opening and whose head is placed in contact with the bolt receiving portion, a female threaded portion into which the bolt is screwed, and a hook portion that is hooked to the floor joist from below.

[0007] In the scaffolding board fastener of claim 1, the bolt shaft is screwed into the female thread of the anchor member, thereby drawing the presser member and the anchor member together. This causes the scaffolding board to be pressed down by the presser plate, and the joist is relatively pulled up to the hook portion, thereby fixing the scaffolding board to the joist.

[0008] The bolt receiving portion of the pressing member is fixed to the lower surface of the pressing plate and extends downward. Therefore, the head of the bolt that is arranged in contact with the bolt receiving portion is arranged in the opening of the pressing plate and is unlikely to protrude from the upper surface of the pressing plate. Therefore, compared to a configuration in which the pressing plate is pressed by a bolt, the number of steps that occur above the scaffolding plate can be reduced. This makes it possible to prevent, for example, a worker working on the scaffolding plate from tripping over the bolt head, making it easier to ensure work safety.

[0009] The scaffolding board fastener of claim 2 is the scaffolding board fastener of claim 1, wherein the bolt receiving portion is a flat backing plate extending along the up-down direction.

[0010] In the scaffold board fixing device of claim 2, a flat backing plate along the vertical direction is placed in the joint. Therefore, the backing plate is placed along the longitudinal direction of the scaffold board. This restricts the orientation of the pressing plate fixed to the backing plate with respect to the scaffold board. Also, the scaffold board fixing device is positioned with respect to the width direction of the scaffold board.

[0011] A scaffolding board fastener of claim 3 is the scaffolding board fastener of claim 2, wherein the end of the pressing plate in a direction intersecting with the direction along which the bolt receiving portion extends is bent downward.

[0012] In the scaffolding board fastener of claim 3, the end of the pressing board in the direction intersecting with the direction along which the backing board runs, i.e., the end in the width direction of the scaffolding board, is bent downward. This makes it easier for the end of the pressing board to bite into the scaffolding board when a wooden scaffolding board such as a cedar board is used, and for the scaffolding board to be firmly held to the joist.

[0013] The scaffolding board fixing device of claim 4 is the scaffolding board fixing device as described in claim 1, wherein the pressing member is provided with a guide portion extending downward from the bolt receiving portion, and the anchor member is provided with a tubular portion into which the guide portion is inserted to guide the upward and downward movement of the pressing member.

[0014] In the scaffolding board fastener of claim 4, the pressing member is positioned relative to the anchor member by inserting the guide part into the tube part. Therefore, the pressing plate is positioned relative to the joist by hooking the hook part of the anchor member to the joist.

[0015] A scaffolding board fastener of claim 5 is the scaffolding board fastener of claim 1, wherein the pressing plate is an annular plate having a circular hole formed therein as the opening.

[0016] In the scaffolding board fixing device of claim 5, since the pressing plate is a circular plate, there are fewer corners compared to a rectangular plate. Therefore, workers' clothes, ropes, etc. are less likely to get caught on the pressing plate, making it easier to ensure work safety.

[0017] A scaffolding board fastener according to claim 6 is the scaffolding board fastener according to claim 1, wherein the nominal diameter of the bolt is 6 mm or less.

[0018] In the scaffolding board fastener of claim 6, the gap between the scaffolding boards can be made smaller compared to when the nominal diameter of the bolt is larger than 6 mm.

[0019] A scaffolding board fastener according to claim 7 is the scaffolding board fastener according to claim 1, wherein the hook portion is formed using two plates.

[0020] In the scaffolding board fastener of claim 7, the hook portion that is hooked onto the joist is formed using two plates. Therefore, it has higher rigidity than a single plate and is less likely to deform when the bolt is screwed in.

[0021] The scaffolding system of claim 8 comprises a floor joist, the scaffolding board fastener according to any one of claims 1 to 7, and a scaffolding board fixed to the floor joist by means of the scaffolding board fastener.

[0022] In the scaffolding system of claim 8, the same effects as those of the scaffolding board fastener of any one of claims 1 to 7 can be obtained. Effect of the Invention

[0023] According to the present invention, the number of steps that arise above the scaffolding board can be reduced. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a plan view partially illustrating a scaffold board fastener and a scaffold system according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view showing a scaffolding board fixing device according to an embodiment of the present invention. [Diagram 3] FIG. 1A is a cross-sectional view showing a scaffolding board fixing device according to an embodiment of the present invention, and FIG. [Figure 4] FIG. 2 is a cross-sectional view showing the assembled state of the parts constituting the scaffolding board fixing device according to the embodiment of the present invention. [Diagram 5] 1A is a plan view showing a state in which a scaffolding board is fixed to a joist using a scaffolding board fixing device according to an embodiment, and FIG. 1B is an elevation view. [Figure 6] FIG. 1 is a perspective view showing a state in which a scaffolding board is fixed to a joist using a scaffolding board fixing device according to an embodiment. [Figure 7] 1A is a plan view showing a scaffolding board fixed to a joist using a scaffolding board fixing device according to an embodiment, and FIG. 1B is an elevation view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, a scaffolding board fixing device and a scaffolding system according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiple numbers.

[0026] In addition, explanations of configurations and symbols that are duplicated in each drawing may be omitted. Note that the present invention is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting configurations, replacing them with different configurations, or combining one embodiment with various modified examples, within the scope of the object of the present invention.

[0027] In each drawing, the directions indicated by the arrows X and Y are directions along a horizontal plane and are perpendicular to each other. The direction indicated by the arrow Z is a direction along the vertical direction (up and down direction). The directions indicated by the arrows X, Y, and Z in each drawing are assumed to be mutually consistent.

[0028] <Scaffolding system> 1 partially shows a plan view of a scaffolding system 10 according to an embodiment of the present invention. The scaffolding system 10 is formed by constructing a work platform 12 on a support constructed using pillars, beams, braces, etc. (not shown).

[0029] The work floor 12 is formed by arranging a plurality of scaffolding boards 12A in the X direction and the Y direction. The scaffolding boards 12A are bridged and fixed to joists 14 installed on supports. The scaffolding board fixing tool 20 according to the embodiment of the present invention is a jig for fixing the scaffolding boards 12A to the joists 14.

[0030] In the arrangement example of the scaffolding board 12A shown in FIG. 1, the X direction is the direction along the width direction of the scaffolding board 12A, and the Y direction is the direction along the longitudinal direction of the scaffolding board 12A.

[0031] <Scaffolding board fixing device> The scaffolding board fixing device 20 shown in Fig. 2 is configured to include a holding member 30, a bolt 40, and an anchor member 50. The holding member 30, the bolt 40, and the anchor member 50 are each formed of steel.

[0032] (Pressing member) The pressing member 30 includes a pressing plate 32, a bolt receiving portion 34, and a guide portion 36.

[0033] The pressing plate 32 is an annular plate material with a circular opening 32V formed in the center. As shown in Fig. 3(B), the end portion in the X direction of the pressing plate 32 is bent downward. This bent end portion is the end portion in the direction (X direction) that intersects with the direction (Y direction) along which a flat bolt receiving portion 34 described later runs.

[0034] As shown in Fig. 2, the bolt receiving portion 34 is a flat backing plate along the vertical direction, and is fixed to the underside of the pressing plate 32 and extends downward. The "backing plate" indicates that the pressing plate 32 is a plate that is placed against the side of the scaffolding board 12A, as shown in Fig. 6.

[0035] The bolt receiving portion 34 is formed by welding two plate members 34A and 34B to the lower surface of the pressing plate 32 individually.

[0036] 3(A), the plate materials 34A and 34B protrude radially inward of the pressing member 30 from the portions welded to the lower surface of the pressing plate 32. Therefore, the plate materials 34A and 34B are also disposed below the opening 32V.

[0037] A gap of width W1 is formed between the plate materials 34A and 34B. As shown in Fig. 4, a shaft portion 42 of a bolt 40 is inserted into this gap. A head portion 44 of the bolt 40 is disposed in contact with a portion of the plate materials 34A and 34B that is disposed below the opening 32V.

[0038] 2, the guide portion 36 is formed integrally with the plate material 34A of the bolt receiving portion 34 and extends downward. The guide portion 36 includes a shaft portion 36A which is a portion where the plate material 34A extends downward, and flange portions 36B which protrude from the shaft portion 36A on both sides in the X direction and extend along the up-down direction.

[0039] (Anchor parts) As shown in FIG. 2, the anchor member 50 includes a cylindrical portion 52, a female threaded portion 54, and a hook portion 56.

[0040] The cylindrical portion 52 is a square tubular body with open upper and lower ends, and the guide portion 36 of the pressing member 30 is inserted from the upper end. A groove 52A is formed along the vertical direction on one side of the cylindrical portion 52. The groove 52A is a through groove that penetrates the cylindrical portion 52 from the outside to the inside.

[0041] When the guide portion 36 is inserted into the tubular portion 52, the shaft portion 36A of the guide portion 36 is placed in the groove 52A. At this time, the flange portion 36B of the guide portion 36 is placed along the inner peripheral wall of the tubular portion 52. This allows the guide portion 36 to move along the axial direction of the tubular portion 52. In other words, the tubular portion 52 can regulate the movement of the pressing member 30 in the up-down direction (guide the up-down movement).

[0042] The female thread portion 54 is a long nut fixed to the inside of the cylindrical portion 52. As shown in FIG. 3(A), an upper end 54U of the female thread portion 54 is disposed below an upper end 52U of the cylindrical portion 52. Therefore, the guide portion 36 can move up and down in the portion between the upper end 54U of the female thread portion 54 and the upper end 52U of the cylindrical portion 52. In addition, a lower end 54D of the female thread portion 54 is disposed above a lower end 52D of the cylindrical portion 52.

[0043] 2, the hook portion 56 is fixed to a lower portion of the groove 52A in the tubular portion 52, and protrudes laterally. The protruding direction of the hook portion 56 is the same direction (Y direction) as the direction along which the plate materials 34A and 34B of the bolt receiving portion 34 extend when the guide portion 36 of the pressing member 30 is inserted into the tubular portion 52. The hook portion 56 is formed by combining two plate materials.

[0044] A stopper 56A protruding upward is provided at the tip of the hook portion 56. As shown in Fig. 6, when the hook portion 56 is engaged with the joist 14, the stopper 56A is caught on the joist 14, and movement of the scaffolding board fixing device 20 in the Y direction is restricted.

[0045] (bolt) 3(A) is a bolt having a shaft portion 42 that is inserted through an opening 32V of the pressing plate 32 into the gap between the plate materials 34A and 34B. A nominal diameter W2 of the shaft portion 42 is smaller than a width W1 of the gap between the plate materials 34A and 34B. The nominal diameter W2 is, for example, 6 mm or less.

[0046] Meanwhile, head 44 has a size equivalent to that of a head of a bolt with a nominal diameter of 10 mm. In other words, bolt 40 is formed by combining the "head of a bolt with a nominal diameter of 10 mm" and the "shank of a bolt with a nominal diameter of 6 mm." The "head of a bolt with a nominal diameter of 10 mm" is compatible with many tools and is more versatile than the "head of a bolt with a nominal diameter of 6 mm."

[0047] 4, the bolt 40 has the shaft portion 42 inserted into the anchor member 50 and screwed into the female thread portion 54. With the shaft portion 42 screwed into the female thread portion 54, the head portion 44 of the bolt 40 is disposed in contact with the bolt receiving portion 34.

[0048] The height H2 of the head 44 is smaller than the height H1 of the presser plate 32. In other words, the height H2 is approximately 1.0 times or less and 0.7 times or more than the height H1. By making the height H2 approximately 1.0 times or less the height H1, the protrusion width from the upper surface of the presser plate 32 is suppressed, and the number of steps is reduced, which is highly effective in suppressing tripping. By making the height H2 0.7 times or more the height H1, the head 44 can be easily turned with a tool.

[0049] A through hole 46 is formed at the tip of the shaft portion 42. A locking member 48 can be inserted into this through hole 46. The length L1 of the locking member 48 is longer than the nominal diameter W2 (see FIG. 3(A)) of the shaft portion 42 and is smaller than the inner diameter L2 of the cylindrical portion 52. Note that the through hole 46 may be a female thread, and the locking member 48 may be a male thread.

[0050] With the tip of the shaft portion 42 protruding from the lower end of the tubular portion 52, the locking member 48 is inserted into the through hole 46. When the bolt 40 is rotated to be pulled out of the tubular portion 52, the locking member 48 locks into the female thread portion 54, preventing the bolt 40 from coming out. In this way, the bolt 40 has a sufficient length to allow the tip to protrude from the tip of the tubular portion 52 when the bolt 40 is screwed into the tubular portion 52 of the anchor member 50 via the pressing member 30.

[0051] <Fixing method> In order to fix the scaffolding board 12A to the joist 14 using the scaffolding board fixture 20, first, as shown in Figures 5(A) and (B), the hook portion 56 is engaged with the joist 14. At this time, it is preferable to engage with the joist 14 in the vicinity of the scaffolding board 12A that has already been positioned or temporarily placed (the scaffolding board 12A on the left side of the paper in Figure 5).

[0052] At this time, the amount of screwing of the bolt 40 into the female thread portion 54 is adjusted so that the pressure plate 32 can be positioned above the scaffolding board 12A placed on the joist 14 with a gap therebetween.

[0053] Next, with the hook portion 56 engaged with the joist 14, the scaffolding board fixing device 20 is moved toward the scaffolding board 12A. At this time, as shown in FIG. 6, the plate members 34A and 34B of the bolt receiving portion 34 are positioned along the side surface of the scaffolding board 12A.

[0054] Furthermore, with the hook portion 56 engaged with the joist 14, the adjacent scaffolding board 12A (the scaffolding board 12A on the right side of the paper in FIG. 5) is slid below the pressing board 32. As a result, the board members 34A and 34B of the bolt receiving portion 34 are sandwiched and positioned in the joint between the two adjacent scaffolding boards 12A. Furthermore, the pressing board 32 is placed from above across the joint between the scaffolding boards 12A.

[0055] 7(A) and (B), the shaft 42 of the bolt 40 is screwed into the female thread 54, and the head 44 of the bolt 40 presses the bolt receiving portion 34 integrated with the holding plate 32. As a result, the scaffolding board 12A and the joist 14 are held in place by the pressing force between the hook portion 56 and the holding plate 32.

[0056] The number of locations where the scaffolding board fasteners 20 are provided per scaffolding board 12A is not particularly limited. However, as shown in Fig. 1, it is preferable to provide the scaffolding board fasteners 20 at at least two locations in the longitudinal direction on each of both widthwise sides of the scaffolding board 12A.

[0057] The "two locations in the longitudinal direction" refer to the locations where the scaffolding board 12A intersects with two selected from the plurality of joists 14 that are laid across the bottom of the scaffolding board 12A. In this case, it is preferable to select the joists 14 that are laid across the scaffolding board 12A at the positions closest to the longitudinal ends of the scaffolding board 12A.

[0058] <Action and Effects> In the scaffolding board fastener 20 and the scaffolding system according to the embodiment of the present invention, the shaft portion 42 of the bolt 40 is screwed into the female thread portion 54 of the anchor member 50, so that the pressing member 30 and the anchor member 50 are drawn toward each other, as shown in Fig. 5 and Fig. 7. As a result, the scaffolding board 12A is pressed down by the pressing plate 32, and the joist 14 is relatively pulled up to the hook portion 56, so that the scaffolding board 12A is fixed to the joist 14.

[0059] As shown in Fig. 4, the bolt receiving portion 34 of the pressing member 30 is fixed to the lower surface of the pressing plate 32 and extends downward. Therefore, the head 44 of the bolt 40 arranged in contact with the bolt receiving portion 34 is arranged in the opening 32V of the pressing plate 32 and is unlikely to protrude from the upper surface of the pressing plate 32. Therefore, compared to a configuration in which the pressing plate is pressed by a bolt, the number of steps generated above the scaffolding board 12A can be reduced. This makes it possible to prevent, for example, a worker working on the scaffolding board 12A from tripping over the head 44 of the bolt 40, making it easier to ensure the safety of the work.

[0060] 6, in the scaffolding board fastener 20 and the scaffolding system according to the embodiment, flat backing plates (plates 34A and 34B) extending in the up-down direction are arranged in the joints between the scaffolding boards 12A as the bolt receiving portions 34. Therefore, the plates 34A and 34B are arranged along the longitudinal direction (Y direction) of the scaffolding board 12A. This restricts the orientation of the pressing plate 32 fixed to the plates 34A and 34B with respect to the scaffolding board 12A.

[0061] Because the orientation of the pressure plate 32 is restricted relative to the scaffolding board 12A, the portions of the pressure plate 32 that are bent downward tend to dig into the scaffolding boards 12A on both sides of the joint, as shown in FIG. 7(B).

[0062] That is, in the pressing plate 32, the end portion in the direction intersecting the direction along which the plate materials 34A and 34B are aligned, i.e., the end portion in the width direction (X direction) of the scaffolding board 12A, is bent downward. As a result, in the pressing plate 32, the bent portion is disposed in the portion protruding in the width direction of the scaffolding board 12A from the joint between the scaffolding boards 12A.

[0063] As a result, when a wooden scaffolding board such as a cedar board is used as the scaffolding board 12A, the end of the pressure board 32 bites into the scaffolding board 12A, making it easy to firmly hold the scaffolding board 12A to the joists 14.

[0064] Moreover, in the scaffolding board fixing device 20 and scaffolding system according to the embodiment of the present invention, as shown in Fig. 2, the guide portion 36 of the pressing member 30 is inserted into the tube portion 52 of the anchor member 50, thereby positioning the pressing member 30 relative to the anchor member 50. Therefore, as shown in Fig. 6, the hook portion 56 of the anchor member 50 is hooked onto the joist 14, thereby positioning the pressing plate 32 relative to the joist 14. In other words, it is easy to position the pressing member 30 in the longitudinal direction of the scaffolding board 12A.

[0065] In addition, in the scaffolding board fixture 20 and the scaffolding system according to the embodiment of the present invention, the pressing board 32 is an annular board, so there are fewer corners compared to a rectangular board. Therefore, workers' clothes, ropes, etc. are less likely to get caught on the pressing board, making it easier to ensure work safety.

[0066] In the scaffolding board fastener 20 and the scaffolding system according to the embodiment of the present invention, the nominal diameter of the bolt 40 is 6 mm or less. Therefore, the gap between the scaffolding boards 12A can be made smaller than when the nominal diameter is larger than 6 mm.

[0067] In addition, in the scaffolding board fixture 20 and scaffolding system according to the embodiment of the present invention, the hook portion 56 that is hooked onto the joist 14 is formed using two plates. Therefore, it has higher rigidity than when using one plate, and is less likely to deform when the bolt 40 is screwed into the anchor member 50.

[0068] <Other embodiments> In the above embodiment, as shown in FIG. 3(B), the end of the pressing plate 32 in the direction intersecting the direction along which the bolt receiving portion 34 extends is bent downward, but the embodiment of the present invention is not limited to this.

[0069] For example, not only the end portion in the direction intersecting the direction along which the bolt receiving portion 34 runs, but also the outer periphery of the pressing plate 32 may be bent downward. Even if the pressing plate 32 is configured in this way, the pressing plate 32 can obtain the ability to bite into the scaffolding board 12A.

[0070] Moreover, the pressing plate 32 may be formed in a flat plate shape without forming such a bend in the pressing plate 32. If the pressing plate 32 is formed in a flat plate shape, the manufacturing of the scaffolding board fixing device 20 is facilitated since the processing labor is reduced.

[0071] In addition, the presser plate 32 does not necessarily have to be circular, and may be rectangular, such as a square, as long as it has an opening in the center. If it is rectangular, it is preferable to chamfer the corners.

[0072] In the above embodiment, as shown in Figures 2 and 6, the guide portion 36 is provided on the pressing member 30, and the shaft portion 36A of the guide portion 36 is disposed in the groove 52A provided in the tubular portion 52 of the anchor member 50, but the embodiment of the present invention is not limited to this.

[0073] For example, such groove 52A may be omitted. That is, without forming a groove in the cylindrical portion 52, the shaft portion 36A may be formed with a protruding width in the Y direction so that it can be inserted into the inside of the cylindrical portion 52. If the groove 52A is omitted, the manufacturing of the scaffolding board fixing device 20 is easier because the processing effort is reduced.

[0074] In the above embodiment, the nominal diameter of the bolt 40 is 6 mm or less, but the embodiment of the present invention is not limited to this. The nominal diameter of the bolt 40 is arbitrary, and it is sufficient that the required shear strength and pull-out resistance are obtained.

[0075] In addition, in the above embodiment, the hook portion 56 of the anchor member 50 is formed using two plates, but the embodiment of the present invention is not limited to this. The hook portion 56 may be formed from one plate. If the hook portion 56 is formed from one plate, the manufacturing effort is reduced, and the manufacturing of the scaffolding board fixing device 20 is easy. In this way, the present invention can be embodied in various aspects.

[0076] <Additional Notes> (((1))) A pressing member having a pressing plate with an opening in the center and hung from above over a joint between scaffolding boards erected on a joist, and a bolt receiving portion fixed to the underside of the pressing plate, extending downward, and disposed in the joint; A bolt having a shaft portion inserted downward from the opening portion of the scaffolding board and a head portion disposed in contact with the bolt receiving portion; An anchor member having a female threaded portion into which the bolt is screwed and a hook portion that is hooked onto the joist from below; A scaffolding board fixing device having a

[0077] (((2))) The scaffolding board fixing device described in (((1))), wherein the bolt receiving portion is a flat backing plate extending in the vertical direction.

[0078] (((3))) In the pressing plate, an end portion in a direction intersecting with a direction along which the bolt receiving portion extends is bent downward. A scaffolding board fixing device as described in (((2))).

[0079] (((4))) The pressing member includes: A guide portion is provided extending downward from the bolt receiving portion, The anchor member includes: a cylindrical portion into which the guide portion is inserted and which guides the up and down movement of the pressing member is provided; A scaffolding board fixing device according to any one of (((1))) to (((3))).

[0080] (((5))) The pressing plate is an annular plate having a circular hole formed therein as the opening. A scaffolding board fixing device according to any one of (((1))) to (((4))).

[0081] (((6))) The nominal diameter of the bolt is 6 mm or less. A scaffolding board fixing device according to any one of (((1))) to (((5))).

[0082] (((7))) The hook portion is formed using two plates. A scaffolding board fixing device according to any one of (((1))) to (((6))).

[0083] (((8))) Joists and A scaffolding board fixing device according to any one of (((1))) to (((7))), A scaffolding board fixed to the joist using the scaffolding board fixing device; A scaffolding system equipped with [Explanation of symbols]

[0084] 10 Scaffolding Systems 12A Scaffolding Board 14 Joists 20 Scaffolding board fixings 30 Pressing member 32 Presser plate 32V opening 34 Bolt receiving part 36 Guide part 40 Volts 42 Shaft 44 Head 50 Anchor member 52 Cylinder part 52A Groove 54 Hook

Claims

1. A pressing member having a pressing plate with an opening in the center and hung from above over a joint between scaffolding boards erected on a joist, and a bolt receiving portion fixed to the underside of the pressing plate, extending downward, and disposed in the joint; A bolt having a shaft portion inserted downward from the opening portion of the scaffolding board and a head portion disposed in contact with the bolt receiving portion; An anchor member having a female threaded portion into which the bolt is screwed and a hook portion that is hooked onto the joist from below; A scaffolding board fixing device having a

2. The scaffolding board fastener according to claim 1 , wherein the bolt receiving portion is a flat backing plate extending in the vertical direction.

3. In the pressing plate, an end portion in a direction intersecting with a direction along which the bolt receiving portion extends is bent downward.

3. A scaffolding board fixing according to claim 2.

4. The pressing member includes: A guide portion is provided extending downward from the bolt receiving portion, The anchor member includes: a cylindrical portion into which the guide portion is inserted and which guides the up and down movement of the pressing member is provided; 2. A scaffolding board fixing according to claim 1.

5. The pressing plate is an annular plate having a circular hole formed therein as the opening.

2. A scaffolding board fixing according to claim 1.

6. The nominal diameter of the bolt is 6 mm or less.

2. A scaffolding board fixing according to claim 1.

7. The hook portion is formed using two plates.

2. A scaffolding board fixing according to claim 1.

8. Joists and A scaffolding board fixing device according to any one of claims 1 to 7, A scaffolding board fixed to the joist using the scaffolding board fixing device; A scaffolding system equipped with

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