Scaffolding plank support structure and scaffolding

Abstract

To provide a metal fixture with a nut which is easy in positioning with respect to a fastening object, and favorable in the workability of fastening work.SOLUTION: A metal fixture 1 with a nut has a cylindrical fastened part 2 in which a female screw 21 is formed at least at a part of an internal peripheral face, and a holding plate 3 having a penetration hole 3a which can accommodate a part of the fastened part 2 therein. The fastened part 2 has a rotating cylinder part 22 rotatably arranged with a center line P as a center, a rotating head part 23 located at either of the rotating cylinder part 22 and the holding plate 3 in an axial line direction, and at least partially overlapped on a peripheral edge part of the penetration hole 3a of the holding plate 3 when viewing the fastened part 2 in the axial line direction, and a flange part 24 located at the other of the rotating cylinder part 22 and the holding plate 3 in the axial line direction, and at least partially overlapped on the peripheral edge part of the penetration hole 3a of the holding plate 3 in the penetration hole 3a when viewing the fastened part 2 in the axial line direction. The rotating cylinder part 22, the rotating head part 23 and the flange part 24 are integrally formed.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a nut fitting and a scaffolding. [Background technology]

[0002] A nut-equipped metal fitting in which a nut is held by the metal fitting is known. For example, Patent Document 1 discloses a nut holder having a clip formed by bending a metal plate and a nut held by the clip. The clip of the nut holder is formed with a polygonal through-hole corresponding to the shape and dimensions of the nut. The nut moves into the polygonal through-hole when the bolt is tightened. This prevents the nut from tilting or spinning freely when the bolt is tightened with the nut holder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2016-56811 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when fastening a nut and a bolt, the nut and the bolt need to be rotated relative to each other while their axes are aligned. With the nut holder of Patent Document 1, a clip that holds the nut is attached to an object to be fastened, allowing the nut to be positioned relative to the object to be fastened. In other words, using the nut holder makes it easy to position the nut relative to the fastening member.

[0005] However, the nut in Patent Document 1 is fixed to the clip. Therefore, when using the nut holder in Patent Document 1, it is necessary to rotate the bolt relative to the nut, which has been placed on the object to be fastened, to perform the fastening operation. In this case, the axis of the bolt needs to be aligned with the axis of the nut, which is located on the opposite side of the object to be fastened from the bolt, which makes the fastening operation less efficient. Therefore, there is a demand for a hardware with a nut that is easy to position relative to the object to be fastened and that allows for easy fastening operation.

[0006] An object of the present invention is to provide a fitting with a nut that is easy to position relative to an object to be fastened and that allows for good fastening workability. [Means for solving the problem]

[0007] A hardware with a nut according to one embodiment of the present invention is a hardware with a nut having an internal thread that is threaded onto the external thread of a bolt. The hardware includes a cylindrical fastened portion extending along an axis and having the internal thread formed on at least a portion of its inner circumferential surface, and a retaining plate with a through hole capable of accommodating a portion of the fastened portion. The fastened portion includes a rotating cylindrical portion disposed within the through hole and rotatable about the axis while passing through the through hole; a rotating head portion located on one side of the axis relative to the rotating cylindrical portion and the retaining plate, and at least a portion of which overlaps with the periphery of the through hole in the retaining plate when the fastened portion is viewed in the axial direction; and a flange portion located on the other side of the axis relative to the rotating cylindrical portion and the retaining plate, and at least a portion of which overlaps with the periphery of the through hole in the retaining plate when the fastened portion is viewed in the axial direction. The rotating cylindrical portion, the rotating head portion, and the flange portion are integrally formed (first configuration).

[0008] In the above-described configuration, the fastened part is held by the holding plate so that it can rotate around the axis of the fastened part. Therefore, the fastening operation can be performed by rotating the fastened part relative to the bolt that has passed through the mounting hole of the object to be fastened. Furthermore, in the above-described configuration, the fastened part held by the holding plate can easily have its axis aligned with the axis of the bolt. Therefore, the fastened part can be easily positioned relative to the bolt that has passed through the mounting hole of the object to be fastened. Therefore, it is possible to provide a fitting with a nut that is easy to work with during the fastening operation.

[0009] In the nut-attached fitting of the first configuration, the retaining plate has a recess recessed in the thickness direction of the retaining plate on the periphery of the through hole on the other surface in the axial direction (second configuration).

[0010] By positioning the flange in a recess formed on the other side of the holding plate, the flange can be prevented from protruding from the other side of the holding plate, and therefore when the nut-equipped fitting is placed on the object to be fastened, the flange of the fastened part can be prevented from interfering with the object to be fastened.

[0011] In the fitting with a nut of the first or second configuration, the rotary head has a polygonal outer shape when the fastened part is viewed in the axial direction (third configuration).

[0012] This allows the rotary head to be easily rotated using a rotary head tightening tool, etc. Therefore, the metal fitting with a nut can be easily fastened to the bolt.

[0013] In the nut-attached fitting of any one of the first to third configurations, the retaining plate has a plurality of the through holes, and the fastened portions are respectively arranged relative to the plurality of through holes (fourth configuration).

[0014] With this configuration, the multiple fastening parts are held by the holding plate. As a result, for example, the holding plate can be placed across multiple fastening objects, and multiple fastening parts can be fastened to multiple bolts that pass through the multiple fastening objects, respectively. Therefore, multiple fastening objects can be connected using the nut-equipped fitting without overlapping.

[0015] In the nut-attached fitting of the fourth configuration, the retaining plate has a shape that is long in one direction, and the plurality of through holes are aligned in the longitudinal direction of the retaining plate (fifth configuration).

[0016] With this configuration, the holding plate can hold multiple fastening parts in a line, which makes it possible to connect multiple fastening objects that are lined up in one direction in a line-up, for example, using metal fittings with nuts.

[0017] A scaffolding according to one embodiment of the present invention comprises a scaffolding board, a scaffolding board support member that supports the scaffolding board, a bolt having an external thread, and a nut-equipped metal fitting having any one of the first to fifth configurations, and the scaffolding board is fixed to the scaffolding board support member by the bolt and the nut-equipped metal fitting (sixth configuration).

[0018] This makes it possible to provide scaffolding in which scaffolding boards are fixed to scaffolding board support members by nut-equipped fittings of any one of the first to fifth configurations.

[0019] In the scaffolding of the sixth configuration, the scaffolding board is sandwiched between the nut-equipped fitting and the scaffolding board support member by fastening the bolt to the fastening portion of the nut-equipped fitting while the scaffolding board is positioned between the nut-equipped fitting and the scaffolding board support member (seventh configuration).

[0020] This allows a scaffolding board without mounting holes to be fixed to a scaffolding board support member using a nut-equipped metal fitting of any one of the first to fifth configurations and a scaffolding board support member, thereby providing scaffolding in which the scaffolding board can be fixed to the scaffolding board support member regardless of the pitch of the bolt mounting holes.

[0021] In the scaffolding of the seventh configuration, the scaffolding board has an attachment hole that penetrates in the thickness direction, and the bolt is inserted into the attachment hole and fastened to the fastening portion of the nut-equipped metal fitting (eighth configuration).

[0022] As a result, the position of the scaffolding board relative to the scaffolding board support member is determined by inserting a bolt that fastens to the nut-equipped fitting of any one of the first to fifth configurations into the mounting hole of the scaffolding board, thereby providing scaffolding that allows multiple scaffolding boards to be easily fixed to the scaffolding board support member. [Effects of the Invention]

[0023] The fastened portion of the fitting with a nut of the present invention is rotatable around the axis of the fastened portion. This allows the fastening operation to be performed by rotating the fastened portion relative to the bolt that penetrates the object to be fastened. The fastened portion is also held by a holding plate. This allows the fastened portion to be easily positioned relative to the bolt that penetrates the object to be fastened. Therefore, it is possible to provide a fitting with a nut that is easy to work with during the fastening operation. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view of a suspended scaffolding in which a nut-equipped fitting according to the first embodiment is used. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is a perspective view of a metal fitting with a nut. [Figure 4] FIG. 4 is an exploded perspective view of the nut-attaching fitting shown in FIG. 3 with a portion enlarged. [Figure 5]FIG. 5 is an exploded perspective view of the nut-attaching fitting shown in FIG. 3 with a portion enlarged. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a diagram illustrating a method for connecting a plurality of objects to be fastened using a nut-attached fitting according to the first embodiment. [Figure 8] FIG. 8 is a cross-sectional view of a nut-attached fitting according to another embodiment. [Figure 9] FIG. 9 is a perspective view of another suspended scaffolding in which the nut-equipped fitting according to the first embodiment is used. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is a cross-sectional view of another embodiment of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and their description will not be repeated. Furthermore, the dimensions of the components in each drawing do not faithfully represent the actual dimensions of the components, the dimensional ratios of the components, etc.

[0026] In the following description, the direction parallel to the central axis P of the fastened part 2 of the nut-equipped fitting 1 will be referred to as the "axial direction" of the fastened part 2, and the direction perpendicular to the central axis P will be referred to as the "radial direction" of the fastened part 2. In the radial direction, the direction approaching the central axis P will be referred to as the "radial inward direction," and the direction away from the central axis P will be referred to as the "radial outward direction." In the following description, the thickness direction of the plate-shaped scaffolding board 64 will be referred to as the up-down direction. However, this definition of direction is not intended to limit the orientation of the nut-equipped fitting 1 according to the present invention when in use.

[0027] Furthermore, in the following description, the expressions "fix," "connect," and "attach" (hereinafter referred to as "fixing") include not only cases where members are directly fixed to each other, but also cases where members are fixed via other members. In other words, in the following description, the expression "fixing" includes both direct and indirect fixing of members to each other.

[0028] (Embodiment 1) The hardware with a nut 1 according to this embodiment is a hardware with a female thread that screws onto the male thread of a bolt. The hardware with a nut 1 is fastened to the tip of a bolt that passes through a bolt mounting hole provided in an object to be fastened. Below, the configuration of the hardware with a nut 1 will be explained using an example in which the object to be fastened is a scaffolding board 64 of a suspended scaffolding 60.

[0029] First, with reference to Fig. 1, a brief description will be given of a suspended scaffolding 60, which is an example of a scaffolding that uses a nut fitting 1 according to this embodiment. The suspended scaffolding 60 is installed below a structure by being suspended from the structure using a wire or the like. Fig. 1 is a perspective view showing a portion of the suspended scaffolding 60 that uses the nut fitting 1. The suspended scaffolding 60 is used in work environments where it is difficult to install scaffolding on the ground, such as when constructing a structure such as a bridge.

[0030] As shown in Figure 1, the suspended scaffolding 60 has a horizontal member 61, a scaffolding board support member 62, a frame member 63, a scaffolding board 64, and a fixing part 65. The horizontal member 61, the scaffolding board support member 62, the frame member 63, and the scaffolding board 64 are connected to each other via the fixing part 65 and the nut-equipped metal fitting 1 according to this embodiment. The suspended scaffolding 60 is suspended from a structure by a wire (not shown) connected to the fixing part 65.

[0031] The horizontal members 61 are pipe-shaped members. FIG. 1 shows a pair of horizontal members 61 extending horizontally and parallel to each other. The scaffolding board support member 62 is a member that is long in one direction. The scaffolding board support member 62 extends horizontally between the pair of horizontal members 61 and in a direction perpendicular to the horizontal members 61. Both longitudinal ends of the scaffolding board support member 62 are connected to the pair of horizontal members 61, respectively. The frame member 63 is a pipe-shaped member that extends in the vertical direction. The frame member 63 is connected to the horizontal members 61.

[0032] The fixing parts 65 are attached to a plurality of locations in the longitudinal direction of the horizontal member 61 and the frame member 63. The horizontal member 61, the scaffolding board support member 62, and the frame member 63 are connected to each other via the fixing parts 65.

[0033] 2, the scaffolding board support member 62 is a member with a concave cross-sectional shape that opens downward. A bolt through-hole 62a that penetrates the scaffolding board support member 62 in the thickness direction is provided in the upper part of the scaffolding board support member 62. A bolt 70 is inserted into the bolt through-hole 62a so that the bolt head 71 contacts the scaffolding board support member 62 and extends upward from the bolt head 71.

[0034] The bolt 70 is fixed to the scaffolding board support member 62 in a state in which rotation around the axis of the bolt 70 and movement in the axial direction of the bolt 70 are restricted relative to the scaffolding board support member 62. The bolt shank 72 of the bolt 70 has a male thread 73 that screws into the female thread 21 of the fastened part 2 of the nut-equipped metal fitting 1.

[0035] In this embodiment, seven bolt through holes 62a are provided in the scaffolding board support member 62. A bolt 70 is inserted into each of the seven bolt through holes 62a. The seven bolts 70 are fixed to the scaffolding board support member 62.

[0036] As shown in FIG. 1, a scaffolding plank 64 is spanned between two scaffolding plank support members 62. In FIG. 1, seven scaffolding plans 64 are spanned between the two scaffolding plank support members 62. The seven scaffolding plans 64 are lined up in the longitudinal direction of the scaffolding plank support members 62 without overlapping. The seven scaffolding plans 64 are connected to each other by nut fittings 1 according to this embodiment. The scaffolding plans 64 form the floor surface of the work area of ​​the suspended scaffolding 60. In other words, the top surfaces of the scaffolding plans 64 form a work platform on which workers perform work and a passageway through which workers can move.

[0037] As shown in Figure 2, the underside of a scaffolding plank 64 is supported by a scaffolding plank support member 62. The scaffolding plank 64 has a mounting hole 64a that penetrates in the thickness direction at the position of a bolt 70 fixed to the scaffolding plank support member 62. The bolt 70 penetrates the mounting hole 64a. As a result, the tip of the bolt 70 protrudes upward from the top surface of the scaffolding plank 64. The scaffolding plank 64 is fixed to the scaffolding plank support member 62 by fastening a nut-equipped metal fitting 1 to the bolt 70 protruding from the scaffolding plank 64.

[0038] (Configuration of metal fittings with nuts) Next, the nut fitting 1 will be described. Fig. 3 is a perspective view showing the configuration of the nut fitting 1. Figs. 4 and 5 are exploded perspective views of the nut fitting 1, showing an enlarged portion of Fig. 3. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 2. As shown in Figs. 4 to 6, the nut fitting 1 has a fastened portion 2 and a retaining plate 3.

[0039] The fastened portion 2 is a cylindrical member having a fastened through hole 2a that penetrates in the axial direction. The fastened through hole 2a has a female thread 21 on at least a portion of its inner circumferential surface. A male thread 73 of the bolt 70 is screwed into the female thread 21.

[0040] The holding plate 3 is a metal fitting that is elongated in one direction. The holding plate 3 has a through hole 3a that penetrates in the thickness direction. A part of the fastened part 2 is housed in the through hole 3a. The holding plate 3 has a uniform thickness overall, except for the peripheral part of the through hole 3a. The holding plate 3 holds the fastened part 2 rotatably.

[0041] As shown in FIG. 3, in this embodiment, the retaining plate 3 has seven through holes 3a arranged in a row at equal intervals in the longitudinal direction of the retaining plate 3. One fastened portion 2 is housed in each of the seven through holes 3a. That is, in this embodiment, the nut-attached fitting 1 has seven fastened portions 2. All seven fastened portions 2 have the same configuration. Therefore, the following describes in detail the configuration of one fastened portion 2 and the retaining plate 3 that rotatably holds that fastened portion 2. Note that the number of through holes 3a in the retaining plate 3 in this embodiment is one example. The retaining plate of the nut-attached fitting may have six or fewer through holes, or eight or more through holes.

[0042] The fastened portion 2 and the retaining plate 3 will be described in detail with reference to Figures 4 to 6. As shown in Figures 4 to 6, the fastened portion 2 has a rotating cylindrical portion 22, a rotating head portion 23, and a flange portion 24. The rotating cylindrical portion 22, the rotating head portion 23, and the flange portion 24 are integrally formed. In this embodiment, the fastened portion 2 has a female thread 21 on the inner circumferential surface of the fastened through hole 2a in a portion where the rotating head portion 23 is located.

[0043] The rotating cylindrical portion 22 passes through the through-hole 3a of the holding plate 3. While passing through the through-hole 3a, the rotating cylindrical portion 22 is rotatable about the central axis P. In other words, the fastened portion 2 is rotatable about the central axis P relative to the holding plate 3.

[0044] The rotary head 23 is located on one side of the rotary cylindrical portion 22 and the holding plate 3 in the axial direction, and extends radially outward from the rotary cylindrical portion 22. In this embodiment, the rotary head 23 has a hexagonal outer shape when viewed in the axial direction. The rotary head 23 overlaps with the peripheral edge of the through hole 3a of the holding plate 3 when viewed in the axial direction.

[0045] The rotating head 23 protrudes relative to the holding plate 3 in the thickness direction of the holding plate 3. In the thickness direction, the surface of the protruding tip of the rotating head 23 is chamfered so that the axial length shortens as it moves radially outward. This makes it possible to prevent a worker moving on the scaffolding board 64, with the nut-attached metal fitting 1 placed on the top surface of the scaffolding board 64, from tripping over the step between the holding plate 3 and the rotating head 23. Note that in order to prevent a worker from tripping over the step, for example, the axial length of the entire rotating head may be shortened.

[0046] The flange portion 24 is located on the other axial side relative to the rotating cylindrical portion 22 and the retaining plate 3. In this embodiment, the flange portion 24 is annular and extends radially outward from the entire circumferential circumference at the other end of the rotating cylindrical portion 22. The flange portion 24 overlaps with the peripheral edge of the through hole 3a of the retaining plate 3 when viewed in the axial direction.

[0047] In this way, in the nut-equipped fitting 1, the rotating head 23 of the fastened part 2 is located on one side of the thickness direction of the retaining plate 3 at the periphery of the through hole 3a, and the flange part 24 of the fastened part 2 is located on the other side of the thickness direction. In other words, the retaining plate 3 is sandwiched between the rotating head 23 and flange part 24 of the fastened part 2 at the periphery of the through hole 3a. This allows the retaining plate 3 to hold the fastened part 2 without it falling out of the through hole 3a of the retaining plate 3, and so that the axial direction is aligned with the thickness direction of the retaining plate 3.

[0048] 5 and 6, the holding plate 3 has a recess 3b recessed in the thickness direction on the periphery of the through hole 3a on the other axial surface where the flange portion 24 is located. The flange portion 24 of the fastened portion 2 is housed within the recess 3b. In other words, the holding plate 3 holds the fastened portion 2 so that the flange portion 24 does not protrude from the holding plate 3 in the thickness direction.

[0049] In this embodiment, the retaining plate 3 has a plurality of through holes 3a. The plurality of through holes 3a are located at positions corresponding to a plurality of bolts 70 protruding from the plurality of scaffolding boards 64 when the retaining plate 3 is placed on the plurality of scaffolding boards 64. A fastened portion 2 is housed within each of the plurality of through holes 3a. That is, the retaining plate 3 holds a plurality of fastened portions 2. The axial direction of the plurality of fastened portions 2 coincides with the thickness direction of the retaining plate 3. Therefore, as shown in FIG. 7 , by placing the retaining plate 3 parallel to the upper surfaces of the plurality of scaffolding boards 64, the plurality of fastened portions 2 can be fastened to the plurality of bolts 70 with the axial direction of each fastened portion 2 coinciding with the axial direction of each bolt 70.

[0050] A plurality of fastened portions 2 fastened to a plurality of bolts 70 are connected by a holding plate 3. Therefore, the holding plate 3 can connect a plurality of scaffolding boards 64 held by a plurality of bolts 70 in the longitudinal direction of the holding plate 3.

[0051] As described above, the nut-attaching fitting 1 according to this embodiment includes a cylindrical fastened portion 2 extending along an axis and having an internal thread 21 formed on at least a portion of its inner circumferential surface, and a retaining plate 3 having a through hole 3a capable of accommodating a portion of the fastened portion 2. The fastened portion 2 includes a rotating cylindrical portion 22 disposed within the through hole 3a and rotatable about the axis while passing through the through hole 3a, a rotating head portion 23 positioned on one side of the axial direction relative to the rotating cylindrical portion 22 and the retaining plate 3 and overlapping with at least a portion of the periphery of the through hole 3a in the retaining plate 3 when the fastened portion 2 is viewed in the axial direction, and a flange portion 24 positioned on the other side of the axial direction relative to the rotating cylindrical portion 22 and the retaining plate 3 and overlapping with at least a portion of the periphery of the through hole 3a in the retaining plate 3 when the fastened portion 2 is viewed in the axial direction. The rotating cylindrical portion 22, the rotating head portion 23, and the flange portion 24 are integrally formed.

[0052] In this configuration, the fastened part 2 is held by the holding plate 3 so that it can rotate around the axis of the fastened part 2. Therefore, the fastened part 2 can be rotated relative to the bolt 70 that has passed through the mounting hole 64a of the scaffolding board 64, thereby performing the tightening work. Furthermore, the fastened part 2 held by the holding plate 3 can easily be aligned with the axis of the bolt 70. Therefore, the fastened part 2 can be easily positioned relative to the bolt 70 that has passed through the mounting hole 64a of the scaffolding board 64. Therefore, it is possible to provide a nut-equipped fitting 1 that is easy to work with during the tightening work.

[0053] (Other embodiments) Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and it is possible to appropriately modify the above-described embodiments within the scope of the spirit of the present invention.

[0054] In the above embodiment, the fastened portion 2 has the female thread 21 on the inner circumferential surface of the fastened through hole 2a where the rotary head 23 is located. However, the fastened portion may have the female thread on any part of the inner circumferential surface of the fastened through hole. For example, as shown in FIG. 8, the fastened portion 102 may have the female thread 121 on the entire inner circumferential surface of the fastened through hole 102a.

[0055] In the above embodiment, the rotating head 23 has a hexagonal shape when viewed in the axial direction. However, the rotating head may have any shape that allows an operator to grip it directly or indirectly when rotating a fastened part around the central axis P. For example, the rotating head may have an outer shape of a polygon other than a hexagon when viewed in the axial direction. The rotating head may have a shape that has a recess recessed radially inward on its outer circumferential surface. Note that by making the rotating head hexagonal when viewed in the axial direction, the rotating head can be easily rotated using a tightening tool such as a wrench.

[0056] In the above embodiment, a chamfer is provided on the surface of the rotary head 23 on the protruding tip side. However, the surface of the rotary head 23 on the protruding tip side does not have to be chamfered.

[0057] In the above embodiment, the flange portion 24 is annular and extends radially outward from the entire circumferential circumference at the other axial end of the rotating cylindrical portion 22. However, the flange portion may extend radially outward from a portion of the circumferential circumference at the other axial end of the rotating cylindrical portion. The flange portion may be divided circumferentially when viewed in the axial direction.

[0058] In the above embodiment, the holding plate 3 has a shape that is long in one direction. However, the holding plate may have any shape that can be arranged along the surface of the object to be fastened, such as a rectangular, circular, polygonal, or other shape with equal lengths in one direction and the other direction. The holding plate may also have a bent shape, such as an L-shape or a U-shape, when viewed in the thickness direction.

[0059] In the above embodiment, the holding plate 3 is a plate extending in one direction. However, the holding plate may have any shape as long as it conforms to the surface of the object to be fastened, and may be curved in the thickness direction, for example.

[0060] In the above embodiment, the holding plate 3 has a uniform thickness throughout, but the holding plate may have portions with different thicknesses.

[0061] In the embodiment, the holding plate 3 has a recess 3b recessed in the thickness direction on the other surface around the through hole 3a. However, the holding plate does not necessarily have to have a recess on the other surface.

[0062] In the above embodiment, the holding plate 3 has a plurality of through holes 3a, but the holding plate may have one through hole.

[0063] In the embodiment described above, the plurality of through holes 3a of the holding plate 3 are aligned in a line in the longitudinal direction of the holding plate 3. However, the through holes do not have to be aligned in a line.

[0064] In the embodiment described above, a fastening portion is disposed in each of the plurality of through holes 3a of the holding plate 3. However, it is not necessary that a fastening portion is disposed in some of the plurality of through holes of the holding plate.

[0065] In the above embodiment, the fastened portion 2 of the nut-equipped fitting 1 is positioned relative to the bolt 70 fixed to the scaffolding board support member 62. However, the fastened portion may also be positioned relative to a bolt that is not fixed to the scaffolding board support member.

[0066] In the above embodiment, the multiple fastened portions 2 of the nut-equipped fitting 1 are positioned relative to the multiple bolts 70 fixed to the scaffolding board support member 62. However, the multiple fastened portions may also be positioned relative to multiple bolts that are each fixed to a different member.

[0067] In the above embodiment, the nut fitting 1 is used in the example of a suspended scaffolding 60, but the nut fitting may also be used for other purposes than suspended scaffolding. In other words, the nut fitting may be used to fasten members other than scaffolding boards. The nut fitting may fasten plate-shaped members, or members of other shapes.

[0068] In the above embodiment, an example has been described in which the nut fitting 1 has multiple fastening portions 2, and multiple objects to be fastened are connected using the multiple fastening portions. However, the nut fitting may have a single fastening portion, and multiple objects to be fastened may be connected in the thickness direction using the single fastening portion.

[0069] In the above embodiment, the scaffolding plank 64 of the suspended scaffolding 60 is fixed by a bolt 70 and a nut fitting 1 inserted into a mounting hole 64a of the scaffolding plank 64. However, as shown in Fig. 9, the scaffolding plank does not have to have a mounting hole through which a bolt passes for fixing to the scaffolding plank support member 62. Fig. 9 is a perspective view showing the schematic configuration of a suspended scaffolding 200, which is another embodiment of the suspended scaffolding 60. Fig. 10 is a cross-sectional view showing a cross section taken along line XX in Fig. 9.

[0070] As shown in Figures 9 and 10, the suspended scaffolding 200 has a scaffolding board support member 210 and a scaffolding board 220 instead of the scaffolding board support member 62 and the scaffolding board 64 in the suspended scaffolding 60.

[0071] The scaffolding board support member 210 is a member that supports the scaffolding board 220. The scaffolding board support member 210 is a member that has a shape that is long in one direction. The scaffolding board support member 210 has a support portion 211 and a contact portion 212. The support portion 211 and the contact portion 212 each have a shape that is long in one direction. The contact portion 212 is fixed on the support portion 211.

[0072] The support part 211 has the same configuration as the scaffolding board support member 62 of the suspended scaffolding 60. The support part 211 is a concave-shaped member having an opening when viewed in the longitudinal direction. The support part 211 is arranged so that the opening faces downward. The upper part of the support part 211 facing the opening has a fixing surface to which the contact part 212 is fixed. The support part 211 has a support part bolt through-hole 211a that penetrates the upper part in the thickness direction. A bolt 70 is inserted into the support part bolt through-hole 211a from below to above the upper part of the support part 211. A bolt head 71 of the bolt 70 is fixed to the upper part of the support part 211 by welding or the like. In other words, the bolt 70 is fixed to the support part 211 with the bolt shank 72 protruding upward from the fixing surface of the support part 211.

[0073] 10, the contact portion 212 is a member extending in the longitudinal direction (one direction) of the support portion 211. The contact portion 212 is fixed to a fixing surface of the support portion 211 by welding or the like so as to fit along the support portion 211.

[0074] The contact portion 212 is a hat-shaped member with an upwardly protruding central portion when viewed in the longitudinal direction. The contact portion 212 has a mounting surface 212d, a pair of restriction surfaces 212a, and an upper end surface 212c. The mounting surface 212d, the pair of restriction surfaces 212a, and the upper end surface 212c are integrally formed.

[0075] The mounting surface 212d extends in the longitudinal direction of the support portion 211 along the fixing surface of the support portion 211. The mounting surface 212d is in contact with the fixing surface of the support portion 211. The long side ends of the mounting surface 212d each protrude outward beyond the long side ends of the support portion 211. The pair of restricting surfaces 212a are rectangular members each extending upward in the longitudinal direction from the mounting surface 212d. The upper end surface 212c is a rectangular member connecting the upper ends of the pair of restricting surfaces 212a. The upper end surface 212c has a contact portion bolt through hole 212b that overlaps with the support portion bolt through hole 211a when viewed in the vertical direction. The bolt shank 72 protruding upward from the fixing surface of the support portion 211 is inserted into the contact portion bolt through hole 212b. The bolt shank 72 is located between the pair of restricting surfaces 212a. The tip of the bolt shank 72 protrudes upward from the upper end surface 212c.

[0076] The configuration of the scaffolding plank 220 differs from the configuration of the scaffolding plank 64 in the suspended scaffolding 60 of the above embodiment in that it does not have any mounting holes. The scaffolding plank 220 is arranged so as to extend in a direction intersecting the longitudinal direction of the two scaffolding plank support members 210 in a plan view. Both longitudinal ends of the scaffolding plank 220 are supported by the scaffolding plank support members 210, respectively. In other words, the scaffolding plank 220 is spanned across the two scaffolding plank support members 210. The end of the scaffolding plank 220 is placed on the placement surface 212d of the contact portion 212 of the scaffolding plank support member 210. The scaffolding plank 220 is located between the restriction surfaces 212a of the contact portions 212 of the two scaffolding plank support members 210. Therefore, the position of the scaffolding plank 220 in the longitudinal direction relative to the scaffolding support members 210 is restricted by the restricting surfaces 212a of the two scaffolding support members 210.

[0077] The height in the thickness direction of the scaffolding board 220 placed on the placement surface 212d of the contact portion 212 is greater than the height of the restriction surface 212a of the contact portion 212, and the position in the thickness direction of the upper surface of the scaffolding board 220 is lower than the tip of the bolt shank 72 of the bolt 70. In other words, the tip of the bolt shank 72 protrudes above the upper surface of the scaffolding board 220. As a result, the scaffolding board 220 is positioned between the nut-equipped fitting 1 fastened to the bolt shank 72 of the bolt 70 and the placement surface 212d of the scaffolding board support member 210. Furthermore, when the bolt shank 72 of the bolt 70 is fastened to the nut-equipped fitting 1, the scaffolding board 220 is sandwiched between the nut-equipped fitting 1 and the placement surface 212d of the scaffolding board support member 210. The scaffolding plank 220 sandwiched between the nut fitting 1 and the placement surface 212d of the scaffolding plank support member 210 undergoes elastic deformation due to the fastening force of the bolt 70 to the nut fitting 1 until its height in the thickness direction becomes equal to the height of the contact portion 212. As a result, the scaffolding plank 220 is fixed to the scaffolding plank support member 210 by the fastening force of the bolt 70 to the nut fitting 1.

[0078] In the suspended scaffolding 200, the bolt 70 is fixed to the scaffolding plank support member 210. However, the bolt 70 does not have to be fixed to the scaffolding plank support member 210. For example, in the suspended scaffolding 200, if the scaffolding plank support member 210 is composed of only the contact portion 212, the bolt 70 may be inserted from below to above the contact portion bolt through-hole 212b, with the bolt head 71 fixed to the contact portion bolt through-hole 212b.

[0079] 10, the contact portion 212 is fixed to the support portion 211. However, the contact portion 212 and the support portion 211 may be formed integrally. For example, the support portion 211 may be formed to have a hat-shaped cross section with the approximate center portion protruding upward when viewed in the longitudinal direction.

[0080] 10 , the scaffolding plank support member 210 has a contact portion 212. However, the scaffolding plank support member 210 does not have to have the contact portion 212. The scaffolding plank 220 may be fixed to the scaffolding plank support member 210 by being sandwiched between the nut fitting 1 and the support portion 211 of the scaffolding plank support member 210.

[0081] 10, a scaffolding board 220 that does not have a mounting hole through which a bolt passes is sandwiched between a contact portion 212 of the scaffolding board support member 210 and a nut-equipped metal fitting 1 and fixed to the scaffolding board support member 210. However, the scaffolding board may also be fixed to a scaffolding board support member that is composed of a contact portion and a support portion by passing a bolt through a scaffolding board that has a mounting hole through which the bolt passes and fastening the nut-equipped metal fitting 1.

[0082] Fig. 11 is a cross-sectional view of the scaffolding board support portion in the example shown in Fig. 10 when a scaffolding board 220 having a mounting hole 220a is fixed to a scaffolding board support member 210. As shown in Fig. 11, the support portion 211 has a support portion bolt through-hole 211b through which a bolt 70 passes, at a portion overlapping with the placement surface 212d in a plan view. Furthermore, the contact portion 212 has a contact portion bolt through-hole 212e through which the bolt 70 passes, at a portion overlapping with the support portion bolt through-hole 211b in a plan view. The bolt 70 is inserted from below upward into the support portion bolt through-hole 211b and the contact portion bolt through-hole 212e. A bolt head 71 is fixed to the support portion 211.

[0083] The scaffolding board 220 has mounting holes 220a at its longitudinal ends through which bolts pass. A bolt shank 72 protruding from the contact portion bolt through-hole 212e is inserted into the mounting holes 220a of the scaffolding board 220. The scaffolding board 220 is fixed to the scaffolding board support member 210 by fastening the bolt shank 72 of the bolt 70 to the nut-equipped metal fitting 1. [Industrial Applicability]

[0084] The present invention can be used for a metal fitting with a nut that is fastened to a bolt. [Explanation of symbols]

[0085] 1 metal fitting with nut 2, 102 Fastened part 2a, 102a Fastened through hole 3 Holding plate 3a Through hole 3b recess 21, 121 female thread 22 Rotating cylindrical part 23 Rotating Head 24 flange 60, 200 Suspended scaffolding 61 Horizontal member 62, 210 Scaffolding board support members 62a Bolt through hole 63 Frame members 64, 220 Scaffolding boards 64a, 220a mounting holes 65 Fixed part 70 volts 71 Bolt head 72 Bolt shaft 73 Male thread 211 Support part 211a, 211b Support bolt through holes 212 Contact part 212a Regulatory aspects 212b, 212e Contact bolt through holes 212c Top surface 212d Placement surface P center axis

Claims

1. A scaffolding board support structure for supporting scaffolding boards in a scaffold, A scaffolding board support member that supports the underside of the scaffolding board; A bolt having an external thread extending upward from the upper portion of the scaffolding board support member; a nut-equipped fitting having an internal thread that is threaded onto the external thread; and The nut-equipped fitting is a cylindrical fastened portion extending along an axis and having the female thread formed on at least a portion of an inner circumferential surface; a holding plate having a through hole capable of accommodating a part of the fastened portion; and The fastened portion is a rotating cylindrical portion disposed in the through hole so as to be rotatable about the axis while passing through the through hole; a rotary head portion that is located on one side of the axial direction relative to the rotary cylindrical portion and the holding plate, and that at least partially overlaps with a peripheral portion of the through hole in the holding plate when the fastened portion is viewed in the axial direction; a flange portion that is located on the other side of the axial direction relative to the rotating cylindrical portion and the holding plate, and that at least partially overlaps with a peripheral portion of the through hole in the holding plate when the fastened portion is viewed in the axial direction; and The rotary cylindrical portion, the rotary head portion, and the flange portion are integrally formed, The bolt is The bolt is fixed to the scaffolding board support member in a state where rotation around the axis and movement in the axial direction of the bolt relative to the scaffolding board support member are restricted, The scaffolding board support structure comprises: With the scaffolding board placed on the scaffolding board support member, the fastened portion of the nut-equipped metal fitting can be rotated from above the scaffolding board support member, so that the male screw and the female screw can be screwed together. Scaffolding plank support structure.

2. 2. The scaffolding board support structure according to claim 1, A scaffolding board support structure in which the retaining plate has a recess recessed in the thickness direction of the retaining plate on the periphery of the through hole on the surface located on the other side in the axial direction.

3. The scaffolding board support structure according to claim 1 or 2, The rotary head has a polygonal outer shape when the fastened portion is viewed in the axial direction. Scaffolding plank support structure.

4. The scaffolding board support structure according to any one of claims 1 to 3, the holding plate has a plurality of the through holes, A scaffolding board support structure, wherein the fastened portions are respectively arranged in correspondence with the plurality of through holes.

5. 5. The scaffolding board support structure according to claim 4, The holding plate is It has a shape that is long in one direction, A scaffolding board support structure, wherein the plurality of through holes are aligned in the longitudinal direction of the support board.

6. Scaffolding boards and The scaffolding board support structure according to any one of claims 1 to 5, The scaffolding, wherein the scaffolding board is fixed to the scaffolding board support member by the bolt and the nut-equipped metal fitting.

7. 7. The scaffolding of claim 6, The scaffolding plank is It has a mounting hole that penetrates in the thickness direction, Scaffolding in which the bolt is inserted into the mounting hole and fastened to the fastening portion of the nut-equipped fitting.

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