JP2018188952A - Scaffold board fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a worker of existing work space or work passage situated in lower side of a top layer to fasten a scaffold board fastener to a bracket etc without depending on the skill of an expert such as a scaffolding man.SOLUTION: A scaffold board fastener (10) has a mooring hook (20) moored to a horizontal member, a holding rod (30) coordinated over adjacent scaffold boards (7) to seat on the upper surface of the side rim part (71) of the scaffold board, a special shaped bolt (40) extending in a vertical direction penetrated through a gap (G) of the scaffold board and interconnecting the mooring hook and the holding rod and a fastening member (42) screwed into the lower part of the special shaped bolt. The upper end part of the special shaped bolt is fixed to the holding rod and the lower part of the special shaped bolt penetrates through a base part of the hook and the fastening member is screwed into an outer screw of the special shaped bolt at lower side of the base part. The special shaped bolt has a partial loss of area part (49) and has a smaller diameter (T1) than a size of the gap (S0).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a scaffolding plate fastener, and more particularly to a scaffolding plate fastener for anchoring or fixing a scaffolding plate of a temporary scaffolding to an arm.

  As temporary scaffolds used for construction work of buildings or civil engineering structures, various types of temporary scaffolds such as single pipe scaffolds, frame scaffolds, wedge-coupled scaffolds, bracket scaffolds, and suspended scaffolds are known. In any type of temporary scaffolding, steel footboards, steel scaffolding boards, and scaffolding boards such as cloth frames with floors (hereinafter referred to as “scaffolding boards”) are the horizontal layers of the uppermost arms, horizontal ground materials, rolls, etc. Laying on the material, a work floor for construction work is formed.

  In general, steel or aluminum alloy scaffolding plates used in single pipe scaffolds, bracket scaffolds, etc. are laid on the arms and secured or moored to the arms by a wire (blunted iron wire), rubber band, etc. . However, the work of tightening and securing the wire is a relatively complicated operation that depends on the skill of a professional worker such as a skilled craftsman. In addition, the wire is a non-reusable temporary material that is discarded when the scaffold is dismantled. The work of tying or mooring the scaffolding board to the arms with the rubber band is also a relatively troublesome and troublesome work. In addition, when the rubber band is used for a long period of time, it is necessary to monitor the relaxation of the rubber band periodically and retighten the rubber band as necessary for functional maintenance. Is done.

  The top floor work floor uses tightening force of bolts and elastic repulsive force of springs, etc. as a countermeasure to solve deterioration of workability of scaffolding board anchoring and mooring work due to the use of wires and rubber bands Have been proposed in the past (Japanese Patent Laid-Open Nos. 10-259659, 11-159133, and 5- No. 33481, Japanese Utility Model Laid-Open No. 6-6601). This kind of scaffolding plate fastener includes a hook-like or annular locking member that abuts on the arm so as to partially surround or hold the lower arm of the scaffolding plate, and a seating member that sits on the upper surface of the scaffolding plate. And a connecting mechanism that connects the locking member and the seating member and tightens or biases the locking member and the seating member so as to approach each other. The coupling mechanism penetrates through a gap formed between the scaffolding plates and couples the dressing member and the locking member to each other, and includes a tightening means or a biasing means such as a bolt or a spring for tightening the coupling mechanism. It functions so as to clamp the scaffolding plate and the brace by the tightening force or elastic repulsion force.

Japanese Patent Laid-Open No. 10-259659 JP-A-11-159133 Japanese Patent Laid-Open No. 5-33481 Japanese Utility Model Publication No. 6-6601

  The scaffolding plate fastener described in Patent Document 4 is of a type in which the scaffolding plate fasteners are sequentially attached between the scaffolding plates in the process of placing or arranging the scaffolding plates on the arms. At the same time, attaching the scaffold plate fastener to the scaffold plate and the arm is a difficult task in practice. For this reason, as described in Patent Documents 1 to 3, many of the conventional scaffold plate fasteners were placed on the scaffolding plate of the uppermost working floor after the scaffolding plate of the uppermost working floor was placed on the arm. An operator or the like is configured to fix or moor the scaffold board to the arm from the upper side of the scaffold board. However, since the scaffolding plate of the uppermost work floor is usually laid on the arm before the handrails are installed, workers etc. work in an incomplete or unstable work environment I have to.

  On the other hand, the existing work space or work passage located below the uppermost layer is a work-safe space in which handrails and the like are already installed. Therefore, it is desired to develop a scaffolding plate fastener that can be used by a worker in the lower working space or working path of the uppermost layer to fix the scaffolding plate of the uppermost working floor to the arm.

  Moreover, since the conventional scaffold board fastener which fixes or anchors a scaffold board to a brace | arm from the upper side of a scaffold board has a comparatively complicated structure as it describes in patent documents 1-3, overall dimension, bulk In addition, the weight is large and it is difficult for an operator or the like to carry a plurality of or many scaffolding plate fasteners. For this reason, many scaffolding plate fasteners developed in the past are not suitable for workers to carry on the scaffolding at actual construction sites, etc., and are difficult to spread in terms of workability or practicality. There was a situation.

  The present invention has been made in view of such circumstances, and the purpose of the present invention is not to depend on the skill of a professional profession such as craftsmanship, but the existing work space located below the uppermost layer. Another object of the present invention is to provide a scaffold plate fastener that can be used by a worker in a work passage to fix or moor the scaffold plate of the uppermost work floor to a brace or the like.

  Another object of the present invention is to provide a scaffold plate fastener that is excellent in portability, can be manufactured relatively easily, and can be easily reused at other construction sites.

In order to achieve the above object, the present invention provides a scaffolding plate fastener used for laying a scaffolding plate on the uppermost working floor of a temporary scaffolding,
A mooring hook that is in contact with the lower surface of the horizontal member supporting the scaffold plate and is moored to the horizontal member;
A presser rod that sits on the upper surface of the side edge of the scaffold plate across the adjacent scaffold plate;
A deformed bolt that extends vertically through the clearance of the scaffold plate and interconnects the mooring hook and the presser rod;
A fastening member screwed into the lower part of the deformed bolt,
An upper end portion of the deformed bolt is fixed to a central region of the presser rod, a lower portion of the deformed bolt is inserted into a bolt insertion hole of a base portion of the hook, and the tightening member is disposed on the lower side of the base portion. Screwed onto the external screw of the bolt,
The portion of the deformed bolt located in the gap has a cross-sectional defect portion in which an annular outer screw band having a diameter larger than the dimension of the gap is partially removed to make the outer screw band discontinuous. And
A flat surface of the deformed bolt formed by the cross-sectional defect portion extends in a vertical direction over at least a height equal to or higher than the height of the gap, and extends in a direction intersecting the presser rod,
The diameter of the part of the deformed bolt that forms the cross-sectional defect portion is set to a value smaller than the dimension of the gap, and the scaffolding plate fastener is provided.

The present invention also relates to a scaffold plate fastener used for laying a scaffold plate of the uppermost working floor of a temporary scaffold.
A mooring hook that is in contact with the lower surface of the horizontal member supporting the scaffold plate and is moored to the horizontal member;
A presser rod that sits on the upper surface of the side edge of the scaffold plate across the adjacent scaffold plate;
A deformed rod that extends vertically through the clearance of the scaffold plate and interconnects the mooring hook and the presser rod;
A fastening member screwed into a screw member fixed to the lower portion of the deformed rod;
An upper end portion of the deformed rod is fixed to a central region of the presser rod, a lower portion of the deformed rod is inserted into a rod insertion hole of a base portion of the hook, and the tightening member is positioned below the base portion. Screwed into the screw member,
The tightening member has a distal end portion that presses the base upward by rotation of the tightening member with respect to the screw member, and the screw member is rotated by rotation of the tightening member with respect to the screw member. A scaffolding plate fastener having a screw for displacing the screw member downward is provided.

  According to the above configuration of the present invention, an operator or the like of an existing work space or work passage located below the uppermost work floor can be pressed into the gap between the scaffolding plates placed on the arms of the uppermost work floor. After inserting and rotating the rod and deformed bolt or deformed rod from the lower side, the scaffolding plate of the uppermost working floor can be moored or fixed to a horizontal member such as a brace by tightening the tightening member . Since this work is a relatively simple work that can be carried out in a stable work space, it can be carried out without depending on the skills of professionals such as craftsmen. In addition, the scaffold plate fastener according to the present invention has a small number of items and a simple structure, so that it can be easily manufactured or manufactured, and can be designed to have a small and lightweight configuration or structure excellent in portability. it can. Furthermore, since the scaffolding plate fastener according to the present invention can be manufactured or manufactured as an assembly of relatively high-rigidity metal mechanical parts, the scaffolding plate fastener can be recovered after dismantling the scaffold and re-used at other construction sites. Can be used.

  Preferably, the bolt insertion hole has a shape of an elongated hole extending in a direction parallel to the gap, and the minor axis of the elongated hole is smaller than the diameter (major axis) of the deformed bolt part not including the cross-sectional defect part. The bolt insertion hole is slightly larger than the diameter (short axis) of the deformed bolt portion in which the cross-sectional defect portion is formed, and the bolt insertion hole extends in a direction generally parallel to the gap (of the hook contacting the horizontal member). The direction of the hook is regulated so as to be directed or oriented in a direction parallel to the center axis of curvature of the curved surface or in a direction extending in parallel to the center axis of the horizontal member.

  Preferably, the portion of the deformed rod located in the gap has a pair of flat surfaces formed by partially removing a circular cross section having a diameter larger than the size of the gap, and the flat surfaces are scaffold plates. It extends in the vertical direction over the height of at least the height of the gap, and extends in a direction crossing the presser rod. Further, the rod insertion hole has a shape of a long hole extending in a direction parallel to the gap, and the short diameter of the long hole is smaller than the cross-sectional dimension of the deformed rod in the direction parallel to the flat surface. The rod insertion hole is oriented so that the central axis of curvature of the curved surface of the hook abutting on the horizontal member extends in parallel to the horizontal member. And restrict the hook direction.

  The major axis of the bolt insertion hole or rod insertion hole is preferably about 1.5 times (1.2 to 1.8 times) the diameter (major axis) of the deformed bolt or deformed rod part that does not include the cross-sectional defect. Can be set.

  More preferably, the base portion has a pair of upright portions, and the upright portions receive the lower surfaces of the side edge portions of the scaffolding plates on both sides to form a recess for restraining the side edge portions of the respective scaffolding plates, Prevents the gap between the scaffolding plates on both sides from spreading apart. The size (width) of the gap is typically about 7 mm, and the size of the gap that can be assumed under normal conditions is in the range of about 5 to 10 mm.

  Preferably, the standing portion has a chamfered portion or a curved portion that enables the deformed bolt and the hook to rotate while the hook is inclined or tilted obliquely downward from the vicinity of the deformed bolt by its own weight.

  In a preferred embodiment of the present invention, the presser rod extends in a direction perpendicular to the gap, the lower surface of the presser rod constitutes a horizontal scaffold plate seating surface, and the flat portion is the deformed bolt or deformed rod. It is the vertical plane arrange | positioned by making a pair on both sides of. This vertical plane is orthogonal to the scaffold board seating surface. According to a further preferred embodiment of the present invention, the tightening member comprises a nut having an inner screw that can be screwed into an outer screw of the deformed bolt, and the flat portion extends over the entire length of the deformed rod. The inner screw is engaged with the outer screw discontinuous by the cross-sectional defect portion. In another preferred embodiment of the present invention, the screw member is a nut that is fixed to a lower portion of the deformed rod and has a center axis of the female screw oriented in the vertical direction, and the tightening member is attached to the nut from below. It is a bolt that can press the tip of an outer screw portion that is screwed and penetrates a nut against the base portion.

  From another point of view, the present invention uses a scaffold plate fastener having the above-described configuration, and an operator of an existing work floor below the uppermost work floor moores the scaffold plate of the uppermost work floor to the horizontal member. Provided is a scaffolding plate installation method characterized in that it is fixed or fixed. In a preferred embodiment of the present invention, the horizontal member is a brace of a single pipe scaffold or a bracket scaffold, and the scaffold plate is a steel or aluminum alloy scaffold plate used in a single pipe scaffold or the like. is there.

Preferably, in the scaffold board installation method using the scaffold board fastener provided with the above-described deformed bolt, a plurality of scaffold boards constituting the uppermost work floor are placed in parallel on the horizontal member of the uppermost work floor,
Insert the presser rod and deformed bolt into the gap of the scaffolding plate from below,
With the presser rod positioned above the scaffolding plate, rotate the scaffolding plate fastener entirely around the center axis of the deformed bolt,
Seat the presser rod under gravity on the upper surface of the side edge of the scaffolding plate on both sides of the gap.
The tightening member is tightened, and the mooring portion of the hook is pressed against the horizontal member by the tightening torque of the tightening member, and the presser rod is pressed against the upper surface of the side edge of the scaffold plate,
A step of narrowing the scaffolding plate and the horizontal member by the hook and the presser rod to maintain the integrity of the scaffolding plate and the horizontal member under pressure.

Preferably, in the scaffold plate installation method using the scaffold plate fastener provided with the deformed rod, the plurality of scaffold plates constituting the uppermost work floor are placed in parallel on the horizontal member of the uppermost work floor. ,
Inserting the presser rod and the deformed rod into the gap between the scaffold plates from below;
With the presser rod positioned above the scaffold plate, rotate the scaffold plate fastener generally around the center axis of the deformed rod,
The presser rod is seated under gravity on the upper surface of the side edge of the scaffolding plate on both sides of the gap,
The fastening member is fastened, and the mooring portion of the hook is pressed against the horizontal member by the fastening torque of the fastening member, and the presser rod is pressed against the upper surface of the side edge of the scaffold plate,
A step of narrowing the scaffolding plate and the horizontal member by the hook and the holding rod to maintain the integrity of the scaffolding plate and the horizontal member under pressure.

  Preferably, at least two scaffold plate fasteners are used for one scaffold plate, and the tightening torque applied to the clamping member is in the range of 15 N · m to 25 N · m, preferably 18 N A value within a range of m to 22 N · m (for example, about 20 N · m (200 kgf / cm)) is set.

  According to a preferred embodiment of the present invention, the scaffold plate installation method further includes the step of assembling the scaffold plate to the horizontal member using the end hardware at the side end of the work floor, wherein the end hardware is , A U-shaped main body, a screw member fixed to a curved portion of the U-shaped main body, and a fastening member screwed into the screw member, and the U-shaped main body partially surrounds the horizontal member by the curved portion. The fastening member is locked or hooked to the side edge of the scaffolding plate by its upper end, and the fastening member is screwed into the screw member from the lower side, and abuts against the lower surface of the horizontal member by its upper end or tip. And by pressing this lower surface, the scaffolding plate and the horizontal member are integrated under pressure.

  According to the scaffolding plate fastener and the scaffolding plate installation method according to the present invention, the worker in the existing work space or work passage located below the uppermost layer without depending on the skill of professionals such as craftsmen, etc. Can anchor or fix the scaffolding plate of the uppermost work floor to the arm or the like.

  Moreover, according to the present invention, it is possible to provide a scaffolding plate fastener that is excellent in portability, can be manufactured relatively easily, and can be easily reused at other construction sites.

FIG. 1 is a partial vertical cross-sectional view and a partial enlarged cross-sectional view of a single pipe scaffold showing configurations of an uppermost work floor and a lower work floor of the single pipe scaffold. 2 (A), 2 (B), 2 (C), and 2 (D) are a front view, a side view, a partial cross-sectional front view, and a front view of a scaffold plate fastener according to the first embodiment of the present invention. FIG. 2E is a partial cross-sectional side view, and FIG. 2E is a cross-sectional view taken along the line II of FIG. 3 (A) and 3 (C) are a plan view and a bottom view of the scaffolding plate fastener, and FIG. 3 (B) is a cross-sectional view taken along line II-II in FIG. 2 (B). 3 (D) and FIG. 3 (E) are partial enlarged views of FIGS. 3 (B) and 3 (C). 4 (A) to 4 (C) are a partial plan view and a partial cross-sectional view of a single-tube scaffold showing a state in which the scaffold plate is moored or fixed on the arm by the fastener 10, and FIG. These are sectional drawings in the III-III line of Drawing 4 (B). FIG. 5 is a partial cross-sectional view of a single tube scaffold showing the assembly process of the scaffold plate fastener step by step. FIG. 6 is a partial cross-sectional view of a single pipe scaffold showing a process of assembling a scaffold plate fastener subsequent to the process shown in FIG. FIG. 7 is a partial cross-sectional view of a single pipe scaffold showing a process of assembling a scaffold plate fastener subsequent to the process shown in FIG. 8A, FIG. 8B, FIG. 8C, FIG. 8D, and FIG. 8E are a front view, a side view, and a plan view of the fastener according to the second embodiment of the present invention. FIG. 8F and FIG. 8G are cross-sectional views taken along lines IV-IV and VV in FIG. 8B. FIG. 9 is a partial cross-sectional view of the single pipe scaffold showing the assembly process of the fastener shown in FIG. 8, and shows a state before the fastener is tightened. FIG. 10 is a partial cross-sectional view of the single pipe scaffold showing the assembly process of the fastener shown in FIG. 8, and shows a state after the fastener is tightened. 11 (A), 11 (B), and 11 (C) are a front view, a side view, and a plan view of the end hardware. 12 (A) and 12 (B) are a side view and a front view showing a state in which the end hardware is locked or hooked to the side edge of the scaffold plate. FIGS. 13A and 13B are a side view and a front view showing a state in which the scaffolding board and the arm are integrated by the end hardware. 14 (A) and 14 (B) are a side view and a front view showing a state in which an aluminum alloy scaffolding board is moored to a brace by an end hardware.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a partial vertical cross-sectional view and a partial enlarged cross-sectional view of a single pipe scaffold showing configurations of an uppermost work floor and a lower work floor of the single pipe scaffold.

In general, the single-pipe scaffolding 1 is constructed of a multi-layer structure including a building 2 made of a single-pipe pipe, a brace 3, a cloth 4, a handrail 5, a middle rail 6, braces (not shown), a scaffold plate 7, and the like. It is arranged along an outer wall surface (not shown) of a building or a structure under construction. As the building sequentially extends to the upper layer according to the progress of the building work, the building 2 is sequentially added to the upper layer by a general-purpose joint fitting, and the arm 2, the cloth 4, etc. are joined by a clamp or a fastener 8 such as a clamp member, A scaffolding plate 7 for each layer is laid on the arm 3 to form a work floor or work passage for each layer. In FIG. 1, workers and the like of an already constructed work floor of the existing uppermost level L _n (hereinafter referred to as “existing work floor”) are illustrated. As shown in FIG. 1, a new top layer level L _{n + 1} of the working floor on the uppermost level L _n (hereinafter, referred to as. "New working floor") to form a bracket 3 is uppermost level L _{n At +1} , the building plate 2 is fastened or fastened by the fastening tool or the fastening tool 8, and the scaffold plate 7 constituting the new work floor is laid on the building site 2.

  FIG. 1 shows a process of anchoring or fixing the scaffolding plate 7 of the new work floor to the arm 3 by the scaffolding plate fastener 10 according to the first embodiment of the present invention. An operator or the like on the existing work floor uses the slight gap G formed between the adjacent scaffolding plates 7 to assemble the scaffolding plate fastener 10 to the scaffolding plate 7 and the arm 3, and then attach the scaffolding plate fastener 10. By fastening, the scaffold board 7 and the arm 3 can be integrated under pressure. The dimension (width) of the gap G shown in the enlarged view (the enlarged view on the right side in FIG. 1) of the state before mounting the scaffolding plate fastener 10 is typically about 7 mm (about 6 to 8 mm). In addition, the side edge of the scaffold board 7 located at the both ends of the work floor is moored or fixed to the arm 3 by the end hardware 9. The end hardware 9 will be described later.

  As shown in an enlarged view (an enlarged view on the left side in FIG. 1) in a state where the scaffolding plate fastener 10 is attached, the scaffolding plate fastener 10 includes a mooring hook 20 moored to the arm 3 below the scaffolding plate 7. And a horizontal presser rod 30 (hereinafter referred to as “horizontal rod 30”) extending across the adjacent scaffolding plate 7, and a coupling mechanism 40 for interconnecting the mooring hook 20 and the horizontal rod 30. Is done. In this embodiment, the scaffold board 7 is a general-purpose steel scaffold board. Hereinafter, the structure of the scaffolding plate fastener 10 (hereinafter referred to as “fastener 10”) will be described with reference to FIGS.

  2A, 2B, 3A, and 3C are a front view, a side view, a plan view, and a bottom view of the fastener 10, respectively. FIGS. 2C and 2D are a partial cross-sectional front view and a partial cross-sectional side view showing the horizontal rod 30 and the mooring hook 20 of the fastener 10 in cross section. FIG. 2E is a cross-sectional view taken along a line II in FIG. FIG. 3B is a cross-sectional view taken along the line II-II in FIG. 3D and 3E are partially enlarged views of FIGS. 3B and 3C. 4 (A) to 4 (C) are a partial plan view and a partial cross-sectional view of the single-tube scaffold 1 showing a state in which the scaffold plate 7 is moored or fixed on the arm 3 by the fastener 10. FIG. FIG. 4D is a cross-sectional view taken along line III-III in FIG.

  As shown in FIGS. 2 and 3, the mooring hook 20 (hereinafter referred to as “hook 20”) of the fastener 10 includes a plate-like base portion 21, a generally curved arc-shaped curved portion 22, and a pair of left and right sides. This is an integral metal member having the upright portion 23. For example, the hook 20 is manufactured or manufactured as an integrally molded product obtained by cutting and bending a steel material having a thickness of 4 to 5 mm.

  The base portion 21 is a flat plate-like portion having a long hole or slot 25 (hereinafter referred to as “long hole 25”) drilled in the central portion, and the long axis of the long hole 25 is the center of curvature of the arc-shaped curved portion 22. Oriented in a direction (X-axis direction) orthogonal to the axis C-C. A modified bolt 41 constituting the coupling mechanism 40 penetrates the long hole 25 in the vertical direction. The scaffold plate 7 is a general-purpose steel scaffold plate, and the upper surface of the base portion 21 is referred to as a rib-shaped side edge 71 (hereinafter referred to as “side edge portion 71”) of the adjacent scaffold plate 7 as shown in FIG. ) From below. The side edge portion 71 includes a side wall 73 of the scaffold plate 7 and a stiffening portion 72 extending substantially horizontally inward from the lower portion of the side wall 73.

  As shown in FIG. 4C, the bending portion 22 extends integrally from the base portion 21, and has a curvature radius R that is substantially the same as or equivalent to the lower surface of the single pipe that constitutes the arm 3 (FIG. 2D). Bend at. The curvature radius R is set to about 25 mm, for example. The upper surface of the bending portion 22 abuts on the outer peripheral surface of the lower half portion of the arm 3 in use. As shown in FIG. 3, a portable device insertion hole 24 is formed in the bending portion 22. The portable tool insertion hole 24 is used by a worker or the like to carry or carry the fastener 10 by inserting a carabiner or the like of a waist bag.

  As shown in FIGS. 2A and 2C, the upright portion 23 is an upward projecting portion of the base portion 21 formed by bending and bending the edge portions on both sides of the base portion 21 upward. A recess 28 having the base 21 as a bottom surface is formed between the standing portions 23. The distance S1 between the left and right standing parts 23 is set to a dimension that allows each side edge 71 of the adjacent scaffold plate 7 to be received in the recess 28 as shown in FIG. The interval S1 is set to about 65 mm, for example. As shown in FIG. 4B, the stiffening portion 72 of the side edge 71 accommodated in the recess 28 abuts on the base 21, and the upright portion 23 is left and right so that the adjacent side edge 71 is not separated. The side edge 71 of the bridge is bridged and restrained.

  As shown in FIGS. 2 (B) and 2 (D), the upright portion 23 is also a chamfered portion (bevel surface) formed by obliquely cutting or removing the upper edge corner located on the side opposite to the arcuate curved portion 22. ) 26. The chamfered portion 26 is formed by the hook 20 centered on the center axis of the deformed bolt 41 (the Z axis shown in FIG. 2D) in a later-described process (FIG. 5C) for attaching the fastener 10 to the scaffold plate 7. Enable rotation.

  As shown in FIG. 2, the horizontal rod 30 of the fastener 10 is made of a metal rod or rod-like member fixed to the upper end of the deformed bolt 41 by a fixing element such as welding or fixing means, and has a horizontal lower surface 31 and an upper surface 34. Have The total length of the horizontal rod 30 is set to about 55 mm, for example. The horizontal rod 30 is oriented in a direction (Y-axis direction) parallel to the upper surface of the base portion 21 and the curvature center axis CC of the curved portion 22. The upper surface side edge and the upper surface edge of the horizontal rod 30 have chamfered portions (bevel surfaces) 32 and 33 formed by chamfering. The lower surface 31 of the horizontal rod 30 is seated on the upper surface of the side edge of the adjacent scaffold plate 7 as shown in FIG.

  As shown in FIG. 2, the coupling mechanism 40 of the fastener 10 includes a deformed bolt 41 that integrally supports the horizontal rod 30, a hex nut 42 that is screwed to the deformed bolt 41 below the base portion 21, and a hex nut 42. And a washer 43 such as a spring washer or a plain washer inserted between the base portions 22. As shown in FIG. 2E, the deformed bolt 41 is formed by cutting or grinding both side portions of the entire screw bolt to form a cross-sectional defect portion 49 (shown by a broken line), whereby a pair of flat surfaces 44 are formed. Has a structure formed. The deformed bolt 41 has an outer screw 45 constituted by a discontinuous outer screw band obtained by partially removing or interrupting an annular outer screw band by a cross-sectional defect portion 49.

  2 (E), FIG. 3 (B) and FIG. 3 (D), similarly to the long hole 25, the modified bolt 41 is long in the direction (X-axis direction) orthogonal to the curvature center axis CC. It has a cross-sectional shape with the axis oriented. The cross sectional dimension T1 (minor axis) in the minor axis direction of the modified bolt 41 is set to a dimension slightly smaller than the dimension S0 (FIG. 4) of the standard gap G formed between the scaffolding plates 7. In the present embodiment, S0 = 7.0 mm and T1 = 6.5 mm are set. A dimension S2 (minor axis) in the minor axis direction of the long hole 25 is set to a dimension slightly larger than the cross-sectional dimension T1, for example, S2 = 7.5 mm. Further, the dimension S3 (major axis) of the long hole 25 in the major axis direction is set to a dimension about 1.5 times the sectional dimension T2 (major axis) of the deformed bolt 41 in the major axis direction. In the present embodiment, T2 = 9.5 mm and S3 = 15 mm are set. As will be described later, the cross-sectional shapes and dimensions of the deformed bolts 41 and the long holes 25 are set by an operator of the existing work floor (FIG. 1) using the gap G between the scaffolding plates 7 of the new work floor. The operation of assembling the scaffold plate fastener 10 to the scaffold plate 7 and the arm 3 is further simplified or facilitated.

  As shown in FIG. 4, the deformed bolt 41 passes through the gap G between the scaffold plates 7, and the scaffold plate 7 is connected to the horizontal rod 30 according to the tightening force of a hexagon nut 42 (hereinafter referred to as “nut 42”). And it clamps with the base 21. Further, the curved portion 22 of the hook 20 is pressed against the arm 3 according to the tightening force of the nut 42, so that the scaffold plate 7 and the arm 3 are sandwiched between the horizontal rod 30 and the hook 20 by the tightening torque of the nut 42. And are integrated by the action of this tightening pressure. In addition, in FIG.4 (C), illustration of the scaffold board 7 located in the near side of a figure is abbreviate | omitted.

  Next, the attachment work of the fastener 10 to the scaffold board 7 and the arm 3, that is, a method of using the fastener 10 will be described.

  FIG. 5 to FIG. 7 are partial cross-sectional views of the single-tube scaffold 1 showing the assembly process of the fastener 10 step by step.

  FIG. 5 (A) shows a state where the scaffold board 7 is placed on the arm 3. When the dimension S0 of the gap G is smaller than the cross-sectional dimension T2 of the deformed bolt 41, the workers on the existing work floor (FIG. 1) slightly move the scaffolding plate 7 as shown by the broken arrow, and slightly remove the gap G. 5 (B), the deformed bolt 41 is inserted into the gap G with the horizontal rod 30 parallel to the gap G, and the horizontal rod 30 is raised above the scaffold plate 7 (see FIG. 5B). FIG. 5C). The hook 20 is supported by the nut 42 in a tilted state in which the curved portion 22 side is directed downward by the action of the free space in the long hole 25 and the weight of the curved portion 22.

  When the fastener 10 is rotated 90 degrees as a whole as shown by an arrow in FIG. 5 (C), the horizontal rod 30 straddles the left and right scaffolding plates 7 as shown in FIG. 6 (A). The seat 20 is seated on the upper surface of the side edge portion of the scaffold plate 7, and the hook 20 is disposed on the lower side of the arm 3 as shown in FIG. The left and right side edge portions 71 can be used as a means for positioning the hook 20 with respect to each scaffold plate 7. The worker or the like moves the scaffold plate 7 slightly as shown by the dashed arrow in FIG. 6 (A) to narrow the gap G, and then impact wrench M or ratchet wrench as shown by the broken line in FIG. 6 (B). The N socket portion is engaged with the nut 42, and the nut 42 is rotated in the tightening direction. As a result, the bending portion 22 abuts on the arm 3 so as to hold or partially surround the lower half of the arm 3 as shown in FIG. 7 (B), and the base 21 is shown in FIG. 7 (A). In this manner, the upright portions 23 are in contact with the stiffening portions 72 of the scaffold plates 7 on both sides so that the adjacent stiffening portions 72 are accommodated in the recesses 28 so that the left and right side edge portions 71 are not separated from each other. The position of 71 is restrained. 6 (B) and 7 (B), the scaffold plate 7 located on the near side of the figure is not shown.

  The hook 20 and the horizontal rod 30 tightly compress the scaffold plate 7 and the arm 3 by increasing the tightening torque of the impact wrench M or the ratchet wrench N10, and the scaffold plate 7 and the arm 3 are integrated with each other under the tightening pressure of the nut 42. Hold. Since the outer screw 45 has its flat surface 44 opposed to the side wall 73 of the scaffolding plate 7 and stabilizes the outer screw 45 at an angular position facing the space G, the outer screw 45 can be connected to the side wall 73 when the fastener 10 is used. It is possible to prevent the external screw 45 from being crushed, worn or damaged by contact, sliding contact, or contact.

  Thus, according to the fastener 10 configured as described above, the position of the side edge 71 is constrained by the upright portion 23, and the scaffold plate 7 and the arm 3 are narrowly pressed by the hook 20 and the horizontal rod 30, whereby the scaffold plate 7 is 3 can be moored or fixed. According to the experiments by the present inventors, the tightening torque can be preferably set to a value of about 20 N · m. Further, when there is a concern about the loosening of the bolts and nuts 41 and 42 due to slight vibration, a spring washer can be preferably used as the washer 43 (FIG. 2).

  When the single pipe scaffold 1 is disassembled, the fastening of the scaffold plate 7 and the arm 3 is released by loosening the nut 42 and lowering the hook 20, so that the scaffold plate 7 can be separated from the arm 3. The fastener 10 which has disengaged from the scaffold plate 7 and the arm 3 is collected for reuse at other construction sites or the like. Since the fastener 10 is used in a state that can prevent the external screw 45 from being crushed or worn or damaged as described above, most of the collected fasteners 10 are good at other construction sites. Can be reused in the state.

  8 (A), 8 (B), 8 (C), 8 (D) and 8 (E) show a fastener 10 'according to another (second) embodiment of the present invention. It is a front view, a side view, a plan view, a longitudinal sectional view, and a bottom view. 8F and 8G are cross-sectional views taken along lines IV-IV and VV in FIG. 8B. 9 and 10 are partial cross-sectional views of the single-tube scaffold 1 showing the assembly process of the fastener 10 'in stages. In each of the drawings, the same reference numerals are assigned to components or components that are substantially the same as or equivalent to the components or components of the embodiment. Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.

As in the above-described embodiment, the fastener 10 ′ of the present embodiment includes a hook 20 moored to the arm 3 on the lower side of the scaffold plate 7 and a horizontal rod 30 extending across the adjacent scaffold plate 7. 'And a connecting mechanism 50 that interconnects the hook 20 and the horizontal rod 30'. The hook 20 is an integral metal member including the base portion 21, the arc-shaped curved portion 22, and the standing portion 23, as in the above-described embodiment. However, the fastener 10 ′ of the present embodiment is different from the above-described embodiment in the following points.
(1) The standing portion 23 has a symmetrical arc-shaped contour in a side view (FIG. 8B), and the topmost portion of the arc-shaped curved surface 27 is a horizontal rod 30 ′ in a plan view (FIG. 8C). Is located on the central axis (Y axis). The height of the ridge at the top is about 10 mm from the upper surface of the base 21.
(2) The horizontal rod 30 ′ has a uniform true circular cross section with a diameter of about 10 mm over its entire length.
(3) The coupling mechanism 50 has a structure in which a hexagon nut 52 is fixed to a lower portion of a deformed rod 51 that does not include a screw, and the hook 20 is pressed by a hexagon bolt 56 that is screwed into the hexagon nut 52. Hereinafter, the configuration of the coupling mechanism 50 will be further described.

  As shown in FIG. 8, the coupling mechanism 50 is screwed into the deformed rod 51 that integrally supports the horizontal rod 30 ′, the hex nut 52 fixed to the deformed rod 51 below the base portion 21, and the hex nut 52. Hexagon bolt 56 is comprised. As shown in FIG. 8 (F), the deformed rod 51 partially cuts or grinds both side portions of the rod material having a true circular cross section to form a cross-sectional defect portion 59 (indicated by a broken line), thereby It has a structure in which a flat surface 54 and a pair of arcuate surfaces 55 are formed.

  The deformed rod 51 (hereinafter referred to as “rod 51”) has a cross-sectional shape in which the major axis is oriented in the direction (X-axis direction) orthogonal to the curvature center axis CC, like the elongated hole 25. The cross-sectional dimension T1 (minor axis) in the minor axis direction of the rod 51 is set to a dimension slightly smaller than the dimension S0 (FIG. 4) of the standard gap G formed between the scaffolding plates 7. In this embodiment, S0 = 7.5 mm and T1 = 7.0 mm are set. A dimension S2 (minor axis) in the minor axis direction of the long hole 25 is set to a dimension slightly larger than the cross-sectional dimension T1, for example, S2 = 7.5 mm. Further, the dimension S3 (major axis) of the long hole 25 in the major axis direction is set to a dimension that is approximately 1.5 times the sectional dimension T2 (major axis) of the rod 51 in the major axis direction. In this embodiment, T2 = 10.0 mm and S3 = 13 mm are set. The cross-sectional shape and dimensions of the rod 51 and the long hole 25 are set by the operator of the existing work floor (FIG. 1) using the gap G between the scaffolding plates 7 of the new work floor, as in the above-described embodiment. This further simplifies or facilitates the work of assembling the fastener 10 ′ to the scaffold plate 7 and the arm 3.

  The hexagon nut 52 (hereinafter referred to as “nut 52”) is integrally attached to the lower end portion of the rod 51 by a fixing element such as welding or fixing means 59 as shown in FIG. An external screw portion 57 of a hexagon bolt 56 (hereinafter referred to as “bolt 56”) is screwed into the nut 52 from below. The axis of the bolt 56 extends in parallel with the axis of the rod 51 and is oriented in the vertical direction like the rod 51.

  FIG. 9 shows a state in which the rod 51 has passed through the gap G (FIG. 5) between the scaffold plates 7. The horizontal rod 30 ′ is disposed on the upper side of the scaffold plate 7 while straddling the left and right scaffold plates 7, and the hook 20 is disposed on the lower side of the arm 3. Since the process until the fastener 10 'is disposed between the scaffolding plates 7 as shown in FIG. 10 is substantially the same as the process shown in FIG. 5, the above description regarding FIG. Detailed description is omitted.

  When the bolt 56 is rotated with a tool (not shown) such as an impact wrench as shown by an arrow in FIG. 9, the distal end portion (upper end portion) of the outer screw portion 57 comes into contact with the lower surface of the base portion 21 of the hook 20 and The horizontal rod 30 ′ and the hook 20 approach each other, the upper surface of the base 21 abuts against the stiffening portion 72 of the scaffold plate 7, and the upright portion 23 has the side edge portion 71 of the adjacent scaffold plate 7. The horizontal rod 30 ′ cooperates with the hook 20 to compress the scaffold plate 7 and the arm 3, and integrates the scaffold plate 7 and the arm 3. Thus, as shown in FIG. 10, the scaffold plate 7 is anchored to the arm 3 under the tightening pressure of the bolt 56 by the horizontal rod 30 ′ and the hook 20. In addition, in FIG. 9 (B) and FIG. 10 (B), illustration of the scaffold board 7 located in the near side of a figure is abbreviate | omitted.

  FIGS. 11A, 11B, and 11C are a front view, a side view, and a plan view of the end hardware 9, respectively. 12 (A) and 12 (B) are a side view and a front view showing a state in which the end hardware 9 is locked or hooked to the side edge 71 of the scaffolding plate 7, and FIG. 13 (A) and FIG. FIG. 13B is a side view and a front view showing a state in which the scaffold plate 7 and the arm 3 are integrated by the end hardware 9.

  Each above-mentioned embodiment is related with fasteners 10 and 10 'for assembling the scaffold board 7 and the arm 3 3 using the slight gap G (Drawing 5) formed between adjacent scaffold boards 7. FIG. Yes, the fasteners 10, 10 'are only used in the middle or middle part of the work floor where the scaffolding plates 7 are connected. On the other hand, in order to assemble the scaffold plate 7 and the arm 3 at the edges (ends) on both sides of the work floor on which the scaffold plate 7 is laid only on one side, an end fitting 9 shown in FIG. 11 is used. The end metal part 9 is screwed into a U-shaped main body portion 90 formed by bending a structural steel bar (round bar) having a diameter of 12 mm, a hex nut 95 fixed to the lower portion of the main body portion 90, and the hex nut 95. It is comprised from the hexagon bolt 96 (FIG. 12, FIG. 13). The main body portion 90 is bent at a right angle from a pair of left and right straight portions 91 extending upward so as to slightly expand, a curved portion 92 interconnecting the straight portions 91 on the lower side, and an upper end portion of each straight portion 91. And the bent portion 93.

  A hex nut 95 (hereinafter referred to as “nut 95”) is integrally attached to the curved portion by a fixing element such as welding or a fixing means. An outer screw portion 97 of a hexagon bolt 96 (hereinafter referred to as “bolt 96”) is screwed into the nut 95 as shown in FIG. FIG. 12 shows a state where the bent portion 93 of the end hardware 9 is locked or hooked to the side edge 71 of the scaffold plate 7. The curved portion 92 of the end hardware 9 surrounds the lower half of the arm 3 from the lower side, and the left and right straight portions 91 extend upward along the side surface of the arm 3 and the side wall 73 of the scaffold plate 7. The bent portion 93 is seated on the upper surface of the side edge portion 71. As shown in FIG. 12, in a state where the end metal part 9 is simply locked or hooked to the side edge part 71, the front end part (upper end part) of the outer screw part 97 is slightly separated from the lower surface of the arm 3. Therefore, the scaffold board 7 and the brace 3 are not yet integrated.

  When the head portion 98 of the bolt 96 is rotated with a tool (not shown) such as an impact wrench as shown by an arrow in FIG. 12, the distal end portion (upper end portion) of the outer screw portion 97 is shown in FIG. It abuts against the lower surface and presses it. When the bolt 56 is further tightened, the side edge 71 and the arm 3 are narrowed by the bolt 56 and the bent portion 93 to be integrated. Thus, the side edge 71 of the scaffolding plate 7 located at both edges (ends) of the work floor is anchored to the arm 3 under the tightening pressure of the bolt 96.

  FIGS. 14A and 14B are a side view and a front view showing a state in which an aluminum alloy scaffolding plate 7 ′ is anchored to the arm 3 by the end hardware 9.

  In each of the above-described embodiments, the use form in which the steel scaffolding plate 7 is laid on the arm 3 has been described, but the fasteners 10, 10 'and the end hardware 9 are made of the aluminum alloy scaffolding plate 7'. 3 can be used in the same manner. FIG. 14 shows a state in which an aluminum alloy scaffolding plate 7 ′ is anchored to the arm 3 by the end hardware 9. As shown in FIG. 14, the aluminum alloy scaffolding plate 7 ′ is slightly smaller in thickness than the steel scaffolding plate 7, and the cross-sectional shape of the side edge portion 71 ′ is the same as the cross-sectional shape of the side edge portion 71. It is substantially different in a slightly different point. Therefore, as shown in FIG. 14, the end metal fitting 9 is a side edge 71 ′ of the scaffolding plate 7 ′ located on both edges (ends) of the work floor. Can be anchored to the arm 3 under the tightening pressure of the bolt 96, and the scaffolding plate 7 'and the arm 3 can be integrated. Similarly, the fasteners 10, 10 'can also be suitably used for installing an aluminum alloy scaffolding plate 7'. If desired, the shape of each part of the fasteners 10, 10 ′ and the end hardware 9 may be optimized or optimized for the installation of the aluminum alloy scaffolding plate 7 ′. Some design changes or size changes may be made with respect to each part structure or each part size.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.

  For example, in the single pipe scaffold according to the above embodiment, the scaffold plate 7 is fixed or moored to the arm 3 only by the fastener 10, but the fastener 10 and other mooring means such as a number wire are used in combination. The scaffold plate 7 may be fixed or moored to the arm 3.

  Further, the structure of each part and the dimensions of each part of the fastener 10 can be appropriately changed in accordance with the use conditions and the like.

  Furthermore, although the configuration of the present invention can be preferably used for anchoring or fixing the steel or aluminum alloy scaffolding plates 7, 7 ', the fastener according to the present invention can also be used in the installation of wooden scaffolding plates. It is.

  Moreover, in the said embodiment, although the deformed bolt was provided with the external thread 45 over the full length, you may form the external thread 45 only in the part which the nut 42 screws.

  The scaffolding plate fastener according to the present invention anchors or fixes the scaffolding plate to a brace or the like in a single pipe scaffolding, bracket scaffolding, etc. for construction, assembly, maintenance or management of construction, civil engineering, large equipment, large machine tools, etc. Used to do. According to the scaffolding plate fastener of the present invention, an existing work space located under the uppermost layer or a worker in a work passage can be provided on the uppermost work floor without depending on the skills of professionals such as carpentry. The scaffold board can be moored or fixed to a brace or the like. The scaffold plate fastener according to the present invention is excellent in portability, can be manufactured relatively easily, and can be easily reused at other construction sites, etc., so its practical effect is Is remarkable.

1 Single-tube scaffold 2 Building 3 Arms
4 Cloth 5 Handrail 6 Middle rail 7, 7 'Scaffold plate 8 Tightening tool or binding tool (clamp member, etc.)
9 End fitting 10, 10 'Scaffold plate fastener 20 Mooring hook 21 Base 22 Arc-shaped curved portion 23 Standing portion 25 Long hole 26 Chamfered portion 28 Recess 30, 30' Horizontal rod (holding rod)
31 Bottom (sitting surface)
40, 50 Connection mechanism 41 Deformed bolt 42 Hexagon nut (tightening member)
43 Washer 44 Flat surface 45 External screw 49, 59 Cross-section missing portion 51 Deformed rod 52 Hex nut 54 Flat surface 55 Arc-shaped surface 56 Hexagon bolt 71, 71 'Rib-shaped side edge 72 Stiffening portion 73 Side wall 90 U-shaped main body portion 91 Straight part 92 Curved part 93 Bent part 95 Hex nut 96 Hex bolt

Claims (16)

In the scaffolding plate fastener used to lay the scaffolding plate of the uppermost working floor of the temporary scaffolding,
A mooring hook that is in contact with the lower surface of the horizontal member supporting the scaffold plate and is moored to the horizontal member;
A presser rod that sits on the upper surface of the side edge of the scaffold plate across the adjacent scaffold plate;
A deformed bolt that extends vertically through the clearance of the scaffold plate and interconnects the mooring hook and the presser rod;
A fastening member screwed into the lower part of the deformed bolt,
An upper end portion of the deformed bolt is fixed to a central region of the presser rod, a lower portion of the deformed bolt is inserted into a bolt insertion hole of a base portion of the hook, and the tightening member is disposed on the lower side of the base portion. Screwed onto the external screw of the bolt,
The portion of the deformed bolt located in the gap has a cross-sectional defect portion in which an annular outer screw band having a diameter larger than the dimension of the gap is partially removed to make the outer screw band discontinuous. And
A flat surface of the deformed bolt formed by the cross-sectional defect portion extends in a vertical direction over at least a height equal to or higher than the height of the gap, and extends in a direction intersecting the presser rod,
The scaffolding plate fastener according to claim 1, wherein a diameter of a portion of the deformed bolt that forms the cross-sectional defect portion is set to a value smaller than a dimension of the gap.   The bolt insertion hole has a shape of a long hole extending in a direction parallel to the gap, and a short diameter of the long hole is smaller than a diameter of a portion of the deformed bolt that does not include a cross-sectional defect portion. The bolt insertion hole has a direction in which the central axis of curvature of the curved surface of the hook abutting against the horizontal member extends in parallel with the horizontal member. The scaffolding plate fastener according to claim 1, wherein the direction of the hook is regulated so as to be oriented in the direction. In the scaffolding plate fastener used to lay the scaffolding plate of the uppermost working floor of the temporary scaffolding,
A mooring hook that is in contact with the lower surface of the horizontal member supporting the scaffold plate and is moored to the horizontal member;
A presser rod that sits on the upper surface of the side edge of the scaffold plate across the adjacent scaffold plate;
A deformed rod that extends vertically through the clearance of the scaffold plate and interconnects the mooring hook and the presser rod;
A fastening member screwed into a screw member fixed to the lower portion of the deformed rod;
An upper end portion of the deformed rod is fixed to a central region of the presser rod, a lower portion of the deformed rod is inserted into a rod insertion hole of a base portion of the hook, and the tightening member is positioned below the base portion. Screwed into the screw member,
The tightening member has a distal end portion that presses the base upward by rotation of the tightening member with respect to the screw member, and the screw member is rotated by rotation of the tightening member with respect to the screw member. A scaffold plate fastener comprising a screw for displacing the screw member downward. The portion of the deformed rod located in the gap has a pair of flat surfaces formed by partially removing a circular cross section having a diameter larger than the size of the gap, and the flat surfaces are formed on the scaffold plate. Extending in the vertical direction across the height of at least the gap and facing the side wall, and extending in a direction intersecting the presser rod,
The rod insertion hole has a shape of a long hole extending in a direction parallel to the gap, and a short diameter of the long hole is smaller than a cross-sectional dimension of the deformed rod in a direction parallel to the flat surface. The rod insertion hole extends in a direction in which the central axis of curvature of the curved surface of the hook abutting on the horizontal member extends in parallel with the horizontal member. The scaffolding plate fastener according to claim 3, wherein the direction of the hook is regulated so as to be oriented.   The base portion has a pair of upright portions, and the upright portions have lower side edge portions on both side of the scaffold plates so as to prevent the scaffold plates on both sides of the gap from separating and expanding the gap. The scaffolding plate fastener according to any one of claims 1 to 4, wherein the scaffolding plate is formed with a recess for receiving and restraining a side edge of each scaffolding plate.   The upright portion has a chamfered portion or a curved portion that enables the deformed bolt and the hook to rotate while the hook is inclined or tilted obliquely downward from the vicinity of the deformed bolt by its own weight. The scaffolding plate fastener according to claim 5.   The presser rod extends in a direction perpendicular to the gap, and the lower surface of the presser rod forms a horizontal scaffolding seating surface, and the flat portions are arranged in pairs on both sides of the deformed bolt or deformed rod. The scaffold plate fastener according to any one of claims 1 to 6, wherein the scaffold plate fastener is a vertical plane orthogonal to the scaffold plate seating surface.   The tightening member includes a nut having an inner thread that can be screwed into an outer thread of the deformed bolt, the flat portion extends over the entire length of the deformed bolt, and the inner thread of the nut includes the cross-sectional defect portion. The scaffolding plate fastener according to claim 1 or 2, wherein the scaffolding plate fastener is screwed into the external screw discontinuous by the above.   The screw member is a nut fixed to a lower portion of the deformed rod and having a center axis of the female screw oriented in the vertical direction, and the tightening member is screwed into the nut from the lower side and penetrates the nut. The scaffolding plate fastener according to claim 3 or 4, wherein the bolt is a bolt capable of pressing a distal end of a screw portion against the base portion.   Using the scaffolding plate fastener according to claim 1, 2, or 8, an operator of an existing working floor below the uppermost working floor moores the scaffolding plate of the uppermost working floor to the horizontal member. Alternatively, a scaffold board installation method characterized by fixing. A plurality of the scaffolding plates constituting the uppermost working floor are placed in parallel on the horizontal member of the uppermost working floor,
Inserting the presser rod and the deformed bolt into the gap of the scaffold plate from below;
With the presser rod positioned above the scaffold plate, rotate the scaffold plate fastener generally around the center axis of the deformed bolt,
The presser rod is seated under gravity on the upper surface of the side edge of the scaffolding plate on both sides of the gap,
The fastening member is fastened, and the mooring portion of the hook is pressed against the horizontal member by the fastening torque of the fastening member, and the presser rod is pressed against the upper surface of the side edge of the scaffold plate,
The scaffolding board installation method according to claim 10, wherein the scaffolding board and the horizontal member are narrowly pressed by the hook and the presser rod to maintain the integrity of the scaffolding board and the horizontal member under pressure.   Using the scaffold plate fastener according to claim 3, 4 or 9, an operator of an existing work floor below the uppermost work floor moores the scaffold plate of the uppermost work floor to the horizontal member. Alternatively, a scaffold board installation method characterized by fixing. A plurality of the scaffolding plates constituting the uppermost working floor are placed in parallel on the horizontal member of the uppermost working floor,
Inserting the presser rod and the deformed rod into the gap between the scaffold plates from below;
With the presser rod positioned above the scaffold plate, rotate the scaffold plate fastener generally around the center axis of the deformed rod,
The presser rod is seated under gravity on the upper surface of the side edge of the scaffolding plate on both sides of the gap,
The fastening member is fastened, and the mooring portion of the hook is pressed against the horizontal member by the fastening torque of the fastening member, and the presser rod is pressed against the upper surface of the side edge of the scaffold plate,
The scaffolding board installation method according to claim 12, wherein the scaffolding board and the horizontal member are narrowly pressed by the hook and the presser rod to maintain the integrity of the scaffolding board and the horizontal member under pressure.   The scaffolding plate installation method according to any one of claims 10 to 13, wherein a tightening torque applied to the tightening member is set to a value within a range of 15 N · m to 25 N · m. The scaffold board installation method according to any one of claims 10 to 14, wherein the scaffold board is installed using at least two of the scaffold board fasteners with respect to one piece of the scaffold board. .
  A step of assembling the scaffolding plate to the horizontal member using an end fitting at a side end of the work floor, the end fitting being fixed to a U-shaped main body and a curved portion of the main body. A screw member and a fastening member screwed into the screw member, wherein the main body partially surrounds the horizontal member by its curved portion and is engaged with a side edge portion of the scaffolding plate by its upper end portion. The fastening member is engaged with the screw member from the lower side, is brought into contact with the lower surface of the horizontal member by the upper end portion or the distal end portion thereof, and presses the lower surface to thereby fix the scaffold. The board and horizontal member are integrated under pressure, The scaffold board installation method of any one of Claims 10 thru | or 15 characterized by the above-mentioned.

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