JP6663726B2 - Hanging bracket for hanging scaffold - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hanging metal fitting for a scaffold plate used for constructing a hanging scaffold.

2. Description of the Related Art Conventionally, when constructing or repairing an elevated structure such as a highway or a bridge, a suspension scaffold is constructed along the extension direction of the elevated structure.

A suspended scaffold plate (hereinafter, simply referred to as “scaffold plate 1”) for constructing a suspended scaffold is configured as shown in FIGS. 12 to 15, and is formed from a square tube that supports both side edges of the flooring material 2. A pair of girder-side frames 3, 3 and a pair of girder-side frames 4, 4, each of which is a circular tube connecting both ends of the girder-side frames 3, 3, are formed in a rectangular frame shape. A center frame 5 comprising a circular tube disposed on the lower side of the floor material 2, having a socket 4 a and a plug 4 b formed at both ends of the wife-side frame 4. Both ends of the frame (hereinafter, simply referred to as "frame 5") are connected to the wife-side frames 4,4.

As shown in FIG. 13, when constructing the suspended scaffold, the scaffold plates 1, 1 are arranged in parallel in the extension direction of the elevated structure by alternately connecting the sockets 4 a and the plugs 4 b, and the ropes 6 such as chains are connected. Is suspended below the elevated structure. In order to enable such a chain or the like to be hung by the rope 6, a window hole 7 facing the frame 5 is opened in the floor material 2 at a predetermined interval. A hanging bracket 8 facing each window hole 7 is provided. Therefore, by connecting the rope 6 to the hanging metal member 8, the frame 5 is hung via the metal member 8.

As shown in FIG. 12, the hanging bracket 8 is formed by a steel rod or the like, and is formed by an oval annular bracket having upper and lower arc portions 8b and 8c above and below the left and right straight portions 8a. By inserting the frame 5 in a loosely fitted state, a position between a raised position H pulled up from the floor material 2 through the window hole 7 and a lowered position L stored under the floor material 2 is obtained. And is mounted so as to be movable up and down.

Therefore, the hanging bracket 8 connects the cable 6 to the upper arc portion 8b while holding the frame 5 from below by the lower arc portion 8c at the ascending position H, thereby connecting the scaffold plate 1 to the elevated structure. Hang it underneath.

By the way, as shown in FIG. 14, the scaffold 1 is transported and stored in a state where many scaffolds 1, 1 are stacked when not in use. The hanging bracket 8 of the scaffold plate 1 before stacking is located at the lowered position L, and is suspended in a vertical position in which the upper arc portion 8b is locked to the frame 5. At this time, the length of the hanging bracket 8 is set to be longer than the thickness T of the scaffold plate 1 (the vertical dimension of the girder-side frame 3), and the lower arc portion 8c is projected below the scaffold plate 1. You.

For this reason, at the time of laminating the scaffold plate 1, as shown in the figure, the posture of the hanging bracket 8 at the lowered position L is changed from the vertical posture to the inclined posture inclined with respect to the axis of the frame 5. It is preferable to store the scaffolds 1 and 1 so as to fit in the internal space (the thickness T) of the one spar side frame 3, whereby a large number of scaffold plates 1 and 1 can be stacked in a low volume.

Japanese Patent Publication No. 7-103679 Japanese Patent No. 2647801 Japanese Patent No. 2647802 Japanese Patent No. 2666442 Japanese Patent No. 3012827 Japanese Patent No. 4106133 Japanese Patent No. 5399865

As described above, the hanging bracket 8 is formed by bending a steel bar or the like into an oval shape, and forms an endless annular body. Therefore, when manufacturing the scaffold plate 1, it is necessary to insert a predetermined number of hanging fittings 8 into the frame 5 in advance, and from that state, weld both ends of the frame 5 to the wife-side frames 4, 4. And the like. In other words, after the both ends of the frame 5 are fixed to the wife-side frames 4, 4, it is no longer possible to attach or remove the hanging bracket.

For this reason, in the production line of the scaffold plate 1, when an error is found in the number of the hanging brackets 8 attached to the frame 5 and the error is found after the both ends of the frame 5 are fixed to the wife-side frames 4, 4. Has a problem that it cannot be changed so as to be a correct number.

In addition, as a result of repeating the construction and dismantling of the suspended scaffold, damage to the various parts of the scaffold plate 1 due to impact or the like may occur, requiring repair or the like, but when the hanging bracket 8 is damaged such as being bent. Has a problem in that it cannot be replaced and therefore cannot be properly repaired.

In this regard, the present inventors have found that the above-described problem can be solved by providing a hanging metal fitting 9 as shown in FIG. 15 as a comparative example with respect to the present invention.

The hanging metal fitting 9 according to the comparative example is a non-circular member having a pair of legs 10b and 10b suspended from both ends of an arc-shaped upper portion 10a by bending a steel rod or the like into a downward substantially U-shape. 10 and a horizontal bar member 11 which is detachably fixed to the legs 10b and 10b in a state of being straddled. Specifically, a bolt 10c is formed at the lower end of the leg 10b, 10b, and the bolt 10c, 10c is provided at both ends of the horizontal bar member 11 in a state where the lock nut 12 is screwed. 11a and 11a, and a fastening nut 13 is fastened to the insertion end.

Therefore, according to this comparative example, the hanging metal member 9 allows the non-circular member 10 and the horizontal bar member 11 to be disassembled and assembled to each other. 10 can be attached to and detached from the frame 5 of the scaffold plate 1, and the above-mentioned problem can be solved.

However, when the horizontal bar member 11 is formed of a member having a rectangular cross section as in the comparative example, as shown in FIG. 15 (B), when a hanging scaffold is constructed, the upper part 10a of the non-annular member 10 has a rope. Since the flat surface 11b on the upper surface of the horizontal bar member 11 is pressed against the frame 5 in a state of being hung by the hanging bar 6, the hanging bracket 9 is unlikely to be inclined in the direction indicated by the arrow in the drawing.

Generally, depending on construction conditions, not all the ropes 6 are always always vertically installed in the vertical direction, and the ropes 6 may be inclined as shown by a chain line in the drawing. The lowering bracket 9 needs to be tiltable so as to be along the inclination direction of the rope 6. In this regard, since the hanging bracket 9 according to the comparative example is difficult to tilt, the ropes are inclined in the tilt direction with respect to the horizontal bar member 11 fixed with the flat surface 11b pressed against the lower surface of the frame 5. There is a risk that the non-annular member 10 receiving the tension of 6 may break due to bending stress or loosen the fastening nut 13 due to distortion in the bending direction.

The present invention provides a hanging bracket for a suspended scaffold plate that solves the above-mentioned problems, and as a means for that, a floor material is laid over an upper part of a pair of girder-side frames, and is provided under the floor material. A frame made of a circular tube is provided on the side, and a window hole facing the frame is opened in the floor material, and a hanging bracket that is vertically movable between a raised position and a lowered position through the window hole is provided on the frame. In the hanging scaffold plate for constructing a hanging scaffold by providing and suspending the hanging fitting with a cord, the hanging fitting is a pair of legs suspended from both ends of an upper part suspended by the cord. A non-annular member having a portion, and a horizontal bar member which is detachably fixed in a state of straddling the leg portion, and a bolt portion formed at a lower end portion of the leg portion of the non-cyclic member is provided with a bolt portion of the horizontal bar member. Insert through the insertion holes provided at both ends, and The horizontal bar member is configured to fasten a fastening nut to the protruding end, and the lateral bar member includes both end portions provided with the insertion holes, and an intermediate portion located between the both end portions, and the clamping nut to form a flat receiving surface for pressing in a surface contact state, to form a circular arc supporting surface which is curved upwardly with respect to the axis of at least the frame to the upper surface portion facing the frame of the intermediate portion, the arc The non-circular member is configured to be tiltable with the support surface in contact with the lower surface of the frame .

In a preferred embodiment of the present invention, the length of the hanging bracket is formed to be greater than the thickness T of the scaffold plate including the vertical dimension of the girder-side frame, and the hanging bracket at the lowered position is provided. In a state of being inclined with respect to the axis of the frame, a plurality of scaffolding plates can be vertically stacked, and at least one of a bolt portion and a horizontal bar member of the hanging bracket at the lowered position, in a lower layer A contact portion is provided for contacting the floor material of the scaffolding plate, and the contact portion forms an arc guide surface that curves downward with respect to the axis of the frame.

The arc guide surface may form a spherical portion at a lower end of the bolt portion, and may be configured by the spherical portion. Alternatively, the abutting portion is constituted by the lower surface of the intermediate portion of the horizontal bar member, and the lower surface of the intermediate portion is formed in an arc surface that curves downward with respect to the axis of the frame, and the arc guide is formed by the arc surface. Surfaces can be configured.

Further, it is preferable that a curved concave portion is formed between the both end portions of the horizontal bar member and formed on the upper surface portion of the intermediate portion along the circular pipe surface of the frame.

According to the present invention, the hanging bracket 14 is configured so that the non-annular member 15 and the horizontal bar member 16 can be disassembled and assembled to each other. It can be attached to and detached from the frame 5. Therefore, it becomes possible to add the hanging metal fittings 14 to the manufactured frame 5 of the scaffold plate 1, remove the existing hanging metal fittings 14, or replace the hanging metal fittings 14 later.

At this time, the horizontal bar member 16 of the hanging bracket 14 is characterized in that it forms an irregularly shaped bar in which an arc-shaped support surface 21 is provided at the intermediate portion 16c and flat receiving surfaces 20 are provided at both ends 16a, 16a. Therefore, when the bolt portion 15c of the non-annular member 15 is fixed to the both end portions 16a, the fastening nut 18 can be pressed against the receiving surface 20 in a surface contact state, so that a strong fastening can be achieved. Then, in a state where the scaffold plate 1 is suspended by suspending the hanging bracket 14 with the cable 6, the arc supporting surface 21 of the horizontal bar member 16 is in contact with the lower surface of the frame 5, and the cable 6 When the hanging bracket 14 is suspended not only in the vertical direction but also in the inclined direction, the arc supporting surface 21 easily rotates with respect to the lower surface of the frame 5, and the hanging bracket 9 is moved in the inclined direction of the rope 6. Since it tilts along, the breakage of the non-circular member 15, the loosening of the fastening nut 18, and the like are prevented, and there is an effect that safety is ensured.

It is a perspective view showing the hanging metal fittings concerning a 1st embodiment of the present invention in an exploded state. It is a perspective view which shows the use condition of the said hanging metal fitting. FIGS. 4A and 4B show an operation when the hanging bracket is moved from a lowered position in a stored state to a raised position, in which FIG. 4A is a cross-sectional view in a stored state, and FIG. is there. FIGS. 4A and 4B show an additional example of the hanging bracket according to the first embodiment, in which FIG. 6A is a front view of the first additional example, and FIG. 6B is a front view of the second additional example. FIGS. 6A and 6B show a hanging bracket according to a second embodiment of the present invention, wherein FIG. 6A is a front view and FIG. 6B is an enlarged view showing an arc guide surface. It shows the action when stacking the scaffolding plate, (A) is a cross-sectional view showing a state in which a hanging bracket at a lowered position is suspended in a vertical posture, and (B) is a hanging bracket by an arc guide surface at the time of stacking. FIG. 9 is a cross-sectional view showing an operation of changing the posture toward the storage posture. It is a perspective view showing the hanging hardware concerning a 3rd embodiment in an exploded state. It is a perspective view which shows the use condition of the said hanging metal fitting. FIGS. 13A and 13B show an additional example of the hanging bracket according to the third embodiment, in which FIG. 13A is a front view and FIG. It shows the action when the hanging metal fitting according to the third embodiment is moved from the lowered position in the retracted state to the raised position, (A) is a sectional view in the retracted state, and (B) is an ascending state. It is sectional drawing of a state. It shows the action when stacking the scaffolding plate, (A) is a cross-sectional view showing a state in which a hanging bracket at a lowered position is suspended in a vertical posture, and (B) is a hanging bracket by an arc guide surface at the time of stacking. FIG. 9 is a cross-sectional view showing an operation of changing the posture toward the storage posture. 1A and 1B show a conventional suspended scaffold plate, wherein FIG. 1A is an overall perspective view, and FIGS. 1B and 1C are enlarged views of a portion provided with hanging metal fittings. It is a perspective view which shows the method of constructing a suspended scaffold by the conventional scaffold board. 1A and 1B show a conventional method of stacking a scaffold plate, wherein FIG. 1A is a perspective view and FIG. FIG. 5A is a perspective view showing a disassembled state of a hanging fitting according to a comparative example, and FIG. 6B is a perspective view showing a used state.

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

(Suspended scaffolding board and suspended scaffolding construct)
The hanging bracket of the present invention is used in place of the hanging bracket 8 provided on the frame 5 in the conventional suspended scaffold plate 1 described above with reference to FIGS. Since the configuration of the scaffold plate 1 and the method of constructing the suspended scaffold are not different from those in the related art, the above description is referred to.

(1st Embodiment)
1 to 3 show a hanging fitting 14 according to a first embodiment of the present invention. The hanging bracket 14 includes a non-annular member 15 having a pair of legs 15b, 15b vertically extending from both ends of an arc-shaped upper portion 15a by bending a steel rod or the like into a substantially downward U-shape. It is constituted by a horizontal bar member 16 which is detachably fixed to the legs 15b, 15b while being straddled.

The leg portions 15b, 15b have a bolt portion 15c formed at the lower end, the lateral bar member 16 has an insertion hole 16b penetrating through both ends 16a, 16a, and the bolt nuts 15c, 15c have lock nuts. The bolts 15c, 15c are inserted into the insertion holes 16b, 16b in a state where the screw 17 is screwed, and the fastening nuts 18, 18 are fastened to the insertion ends.

Therefore, the hanging bracket 14 allows the non-annular member 15 and the horizontal bar member 16 to be disassembled and assembled to each other, and can be detached from the frame 5 of the scaffold plate 1 by removing the horizontal bar member 16. Is possible. At this time, as shown in the figure, it is preferable that the fastening nut 18 constitutes a so-called super slit nut in which a slit 18a is provided on the outer peripheral portion.

In the case of the first embodiment, the horizontal bar member 16 has flat upper receiving surfaces 19 and lower receiving surfaces 20 on the upper and lower surfaces of both ends 16a, 16a, respectively. The receiving nut 19 is pressed against the lower receiving surface 20 in a surface contact state while the fastening nut 18 is pressed against the lower receiving surface 20 in the surface contact state. Both ends 16a can be firmly fastened.

On the other hand, as shown in FIG. 2, an intermediate portion 16c located between both end portions 16a of the horizontal bar member 16 has an arc-shaped support surface curved upward on the upper surface with respect to the axis of the frame 5, as shown in FIG. 21 are formed. In the illustrated example, the intermediate portion 16c is formed to have a circular or elliptical cross section, so that the arc support surface 21 is provided on the upper surface.

It is preferable that the horizontal bar member 16 having such a configuration has high rigidity and high strength by forging a steel bar or a steel material.

Therefore, according to the first embodiment, as shown in FIG. 2, when a hanging scaffold is constructed with the hanging metal fitting 14 attached to the frame 5 of the scaffold plate 1, the upper part 15 a of the non-circular member 14 is formed. Is suspended by the cable 6, and the arc supporting surface 21 of the horizontal bar member 16 is pressed against the lower surface of the frame 5.

As described above, depending on the construction conditions of the suspension scaffold, the rope 6 may suspend the suspension fitting 14 not only in the vertical direction but also in the inclined direction. Since the surface 21 rotates easily, it is possible to tilt the hanging metal fitting 9 along the tilt direction of the cable 6. As a result, there is no fear of breakage of the non-circular member 15, loosening of the fastening nut 18, and the like, and safety can be ensured.

Further, the posture of the hanging metal fittings 14 from the storage posture inclining at the lowered position L as shown in FIG. 3A to the vertical posture erecting at the ascending position H as shown in FIG. When the lifting member 14 is lifted while being changed, as shown in the figure, the hanging support 14 is restrained between the window hole 7 of the floor material 2 and the lower surface of the frame 5 and the arc supporting surface 21 of the horizontal bar member 16 is It is possible to smoothly change the posture in the upright direction by sliding while easily rotating along the lower surface of.

(Additional embodiment)
FIG. 4 shows an additional example of the hanging fitting 14 according to the first embodiment, in which a nut drop-off preventing means 22 is provided at the insertion end of the bolt portion 15c inserted from the fastening nut 18.

In the case of the first additional embodiment shown in FIG. 4 (A), the nut drop-off preventing means 22 is constituted by a split pin 22a inserted and fixed to the insertion end of the bolt portion 15c. In this case, the nut 18 is prevented from falling off.

In the case of the second additional embodiment shown in FIG. 4B, the nut drop-off preventing means 22 is a plastic hardening agent 22b made of a bond or other adhesive applied to the outer peripheral portion of the insertion end of the bolt portion 15c and hardened. And prevents the fastening nut 18 from being loosened and falling off.

(2nd Embodiment)
FIGS. 5 and 6 show a hanging fitting 14 according to a second embodiment of the present invention. The basic configuration is the same as that of the above-described first embodiment, the same components are denoted by the same reference numerals, and only the differences will be described.

As shown in FIG. 5, the distal end (lower end) of the bolt portion 15 c of the non-circular member 15 constituting the hanging bracket 14 forms a spherical portion 23 a that is rounded by forging or the like. 5 form an arc guide surface 23 that curves downward with respect to the axis 5.

When the non-use scaffolds 1 and 1 are stacked for transportation and storage as described above, the scaffolds in which the hanging fittings 14 are in the vertical position at the lowered position L as shown in FIG. 6 is laminated on the lower scaffold 1a as shown in FIG. 6 (B). According to the second embodiment, the hanging bracket 14 is smoothly changed in posture toward the inclined storage posture. be able to.

As described above, the length of the hanging metal fitting 14 is formed to be greater than the thickness T of the scaffolding plate 1 including the vertical dimension of the girder-side frame 3, so that the scaffolding plate 1 is attached to the lower scaffolding plate 1a. When mounted on the floor, the arc guide surface 23 of the hanging bracket 14 in the vertical posture abuts on the floor plate 2 of the lower scaffold plate 1a, moves upward as shown by a chain line in FIG. The upper part 15 a of the projection 15 projects above the window hole 7. Then, when the operator lowers the scaffold plate 1 while pushing the upper portion 15a in the inclined direction as shown by the arrow P in the drawing with the fingertip or the like, the arc guide surface 23 moves along the floor plate 2 of the lower scaffold plate 1a. While rotating, it slides as shown by the arrow F in the drawing, and the hanging bracket 14 can be suitably guided toward the inclined storage posture.

(Third embodiment)
7 to 11 show a hanging fitting 14 according to a third embodiment of the present invention. The hanging bracket 14 is a non-annular member 15 having a pair of legs 15b, 15b suspended from both ends of an arc-shaped upper portion 15a by bending a steel rod or the like into a downward substantially U-shape. It is constituted by a horizontal bar member 16 which is detachably fixed to the legs 15b, 15b while being straddled.

The leg portions 15b, 15b form a bolt portion 15c at a lower end portion, and the lateral bar member 16 has an insertion hole 16b penetrating through both end portions 16a, 16a, and the bolt portions 15c, 15c are inserted through the bolt portions 15c, 15c. It is configured to be inserted through the holes 16b, 16b and fasten the fastening nuts 18, 18 to the insertion ends.

Therefore, the hanging bracket 14 allows the non-annular member 15 and the horizontal bar member 16 to be disassembled and assembled to each other, and can be detached from the frame 5 of the scaffold plate 1 by removing the horizontal bar member 16. Is possible. At this time, as shown in the figure, it is preferable that the fastening nut 18 constitutes a so-called super slit nut in which a slit 18a is provided on the outer peripheral portion.

The above configuration is the same as that of the hanging fitting of the first embodiment described above, but the leg 15b is provided with the contact fixing portion 24 facing the bolt portion 15c, and the bolt portion 15c is connected to the horizontal bar member 16. And the fastening nut 18 is fastened to the insertion end so that both end portions 16a of the horizontal bar member 16 are sandwiched between the contact fixing portion 24 and the fastening nut 18 from above and below. Make up. Therefore, the lock nut 17 unlike the first embodiment is not required. In the illustrated example, the contact fixing portion 24 is formed by fixing a metal plate or the like to the leg portion 15b by welding or the like, but the metal material on the peripheral surface of the leg portion 15b is projected by plastic deformation. May be constituted by ribs or projections formed by the above.

Therefore, in the case of the third embodiment, the horizontal bar member 16 has a flat receiving surface 20 on the lower surface of both ends 16a, 16a, and the fastening nut 18 is brought into surface contact with the receiving surface 20. It is configured to be in pressure contact with each other, thereby enabling a firm connection between the bolt portion 15c of the non-annular member 15 and both end portions 16a of the horizontal bar member 16.

In this case, as in the additional embodiment shown in FIG. 9, it is preferable to provide a nut drop-off preventing means 22 at the insertion end of the bolt portion 15c inserted from the fastening nut 18. In the case of the example shown in the figure, the nut drop-off preventing means 22 is constituted by the split pin 22a inserted and fixed to the insertion end of the bolt portion 15c, but the plastic made of the adhesive or the like as described above with reference to FIG. It may be composed of a curing agent.

An intermediate portion 16c located between both end portions 16a of the horizontal bar member 16 has a curved concave portion 25 which is curved on the upper surface along the circular pipe surface of the frame 5, as shown in FIG. In addition, by forming the cross section of the curved concave portion 25 into a substantially semicircular shape, the arc supporting surface 21 that curves upward with respect to the axis of the frame 5 is formed.

The lower surface of the intermediate portion 16c constitutes the lowermost end of the hanging bracket 14, that is, expands downward so as to be located below the lower end of the bolt 15c inserted from the fastening nut 18. The arc guide surface 23 is provided by forming the lower surface portion on an arc surface 23 b that curves downward with respect to the axis of the frame 5.

It is preferable that the horizontal bar member 16 having such a configuration has high rigidity and high strength by forging a steel bar or a steel material.

Therefore, according to the third embodiment, as shown in FIG. 8, when a hanging scaffold is constructed with the hanging fitting 14 attached to the frame 5 of the scaffold plate 1, the upper part 15 a of the non-annular member 14 is formed. The arc support surface 21 is pressed against the lower surface of the frame 5 while the curved concave portion 25 of the horizontal bar member 16 extends along the circumferential direction of the frame 5. Accordingly, the horizontal bar member 16 is rotatable around the center of the circular tube of the frame 5 via the curved concave portion 25 in the hanging direction of the non-circular member 14, whereby the non-circular member 14 is moved together with the horizontal bar member 16. The centering is performed toward the frame 5, and the suspension load is suitably transmitted to the frame 5.

As described above, depending on the construction conditions of the suspension scaffold, the rope 6 may suspend the suspension fitting 14 not only in the vertical direction but also in the inclined direction. Since the surface 21 rotates easily, it is possible to tilt the hanging metal fitting 9 along the tilt direction of the cable 6. As a result, there is no fear of breakage of the non-circular member 15, loosening of the fastening nut 18, and the like, and safety can be ensured. In addition, since the arc supporting surface 21 is formed along the curved concave portion 25, it is in line contact with the lower surface of the frame 5 in the circumferential direction, and suitably supports the frame 5 in a holding state.

The posture of the hanging fitting 14 is changed from the storage posture inclined at the lowered position L as shown in FIG. 10A to a vertical posture which is raised at the raised position H as shown in FIG. As shown in the drawing, the hanging bracket 14 is held between the window 7 of the floor material 2 and the lower surface of the frame 5 while the arc-supporting surface 21 of the horizontal bar member 16 is It is possible to smoothly change the posture in the upright direction by sliding while easily turning along.

As described above, when stacking the scaffold plates 1 and 1 when not in use for transportation and storage, as shown in FIG. 11A, the scaffold plate 1 in which the hanging bracket 14 is in the vertical position at the lowered position L is used. Then, as shown in FIG. 11 (B), it is laminated on the lower scaffold plate 1a. At this time, the posture of the hanging bracket 14 can be smoothly changed to the inclined storage posture.

The length of the hanging bracket 14 is formed to exceed the thickness T of the scaffold plate 1 including the vertical dimension of the girder-side frame 3, and is formed on the lower surface of the intermediate portion 16c of the horizontal bar member 16 as described above. When the scaffold plate 1 is placed on the lower scaffold plate 1a, the arc guide surface 23 of the hanging metal fitting 14 in the vertical posture is positioned at the lower scaffold plate 1a. 11B, and moves upward as indicated by a chain line in FIG. 11B, and projects the upper portion 15a of the non-circular member 15 above the window hole 7. Then, when the operator lowers the scaffold plate 1 while pushing the upper portion 15a in the inclined direction as shown by the arrow P in the drawing with the fingertip or the like, the arc guide surface 23 is moved along the floor plate 2 of the lower scaffold plate 1a. While rotating, it slides as shown by the arrow F in the drawing, and the hanging bracket 14 can be suitably guided toward the inclined storage posture.

DESCRIPTION OF SYMBOLS 1 Scaffolding board 2 Flooring 3 Girder side frame 4 Wife side frame 4a Socket 4b Plug 5 Frame (center frame)
6 Rope 7 Window hole 8 Hanging bracket (conventional example)
9 Hanging brackets (comparative example)
14 Hanging bracket (the present invention)
15 Non-circular member 15a Upper part 15b Leg part 15c Bolt part 16 Horizontal bar member 16a Both ends 16b Insertion hole 16c Intermediate part 17 Lock nut 18 Fastening nut 18a Slit 19 Upper receiving surface 20 Lower receiving surface 21 Arc support surface 22 Nut drop-off prevention means 22a Split pin 22b Plastic hardener 23 Arc guide surface 23a Spherical portion 23b Arc surface 24 Contact fixing portion 25 Curved concave portion

Claims (5)

A floor material is straddled over the pair of girder-side frames, a frame (5) made of a circular pipe is provided below the floor material (2), and a window hole (7) facing the frame is opened in the floor material. By providing a hanging bracket (14) vertically movable between a raised position and a lowered position through the window hole in the frame, and suspending the hanging bracket with a cable, a hanging scaffold is provided. In the suspended scaffold to be built,
The hanging bracket (14) is a non-annular member (15) including a pair of legs (15b, 15b) suspended from both ends of an upper portion (15a) suspended by the cable (6), A horizontal bar member (16) that is removably fixed in a state of straddling the leg portion,
Bolts (15c, 15c) formed at the lower ends of the legs of the non-annular member (15) are inserted into both ends of the horizontal bar member (16) through insertion holes (16b, 16b). It is configured to fasten a fastening nut (18) to the insertion end of
The horizontal bar member (16) includes both ends (16a, 16a) provided with the insertion holes and an intermediate portion (16c) located between the both ends, and the fastening nut is provided at the both ends (16a). Forming a flat receiving surface (20) for pressing the (18) in a surface contact state, and curving upward at least with respect to the axis of the frame on the upper surface of the intermediate portion (16c) facing the frame (5). A circular support surface (21) to be formed, and the non-circular member (15) is configured to be tiltable in a state where the circular support surface (21) is in contact with the lower surface of the frame (5). Characteristic hanging brackets for hanging scaffolds. The length of the hanging bracket (14) is formed to be greater than the thickness T of the scaffold plate (1) including the vertical dimension of the girder-side frame (3), and is set as the lowered position (L). In a configuration in which the plurality of scaffolding plates (1) can be vertically stacked in a state in which the hanging bracket (14) is inclined with respect to the axis of the frame,
At least one of the bolt portion (15c) and the horizontal bar member (16) of the hanging bracket (14) at the lowered position (L) contacts the floor material (2) of the scaffold plate (1a) located in the lower layer. It has a contact part that touches,
The hanging metal fitting of the suspended scaffolding plate according to claim 1, wherein the abutting portion forms an arc guide surface (23) that curves downward with respect to the axis of the frame. The suspension of the suspended scaffolding plate according to claim 2, wherein a spherical portion (23a) is formed at a lower end of the bolt portion (15c), and the spherical portion constitutes the arc guide surface (23). Hanging hardware. The lower surface of the intermediate portion (16c) of the horizontal bar member (16) constitutes the contact portion, and the lower surface of the intermediate portion is formed as an arc surface (23b) that curves downward with respect to the axis of the frame. The hanging metal fitting of the suspended scaffold plate according to claim 2, wherein the arc guide surface (23) is constituted by: A curved concave portion (25) is formed between both ends (16a, 16a) of the horizontal bar member (16), and on the upper surface of the intermediate portion (16c), along the circular pipe surface of the frame. The hanging metal fitting of the suspended scaffolding plate according to claim 1, 2, 3, or 4, wherein:

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