JP2017128876A - Suspension metal fitting of suspension scaffold board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension metal fitting of a scaffold board used for constructing a suspension scaffold.SOLUTION: In a suspension scaffold board for constructing a suspension scaffold by suspending and holding a suspension metal fitting projected from a window hole (7) of a floor material by a cable (6) by vertically movably providing the suspension metal fitting (14) in a frame (5) composed of a circular pipe provided on the lower side of the floor material (2), the suspension metal fitting (14) is detachably constituted by fastening a fastening nut (18) to the insertion end of bolt parts by inserting the bolt parts (15c and 15c) provided in a leg part of a non-annular member (15) suspended by the cable into both end parts (16a and 16a) of a horizontal bar member (16), and the horizontal bar member (16) forms a flat receiving surface (20) for bringing the fastening nut (18) into pressure contact with both end parts in a surface contact state, and forms a circular arc support surface (21) of curving upward to the axis of at least the frame in an upper surface part of facing to the frame (5) of an intermediate part (16c) positioned between both end parts.SELECTED DRAWING: Figure 8

Description

The present invention relates to a hanging bracket for a scaffold plate used for constructing a suspended scaffold.

Conventionally, when an elevated structure such as an expressway or a bridge is constructed or repaired, a suspension scaffold is constructed along the extension direction of the elevated structure.

A suspended scaffolding plate (hereinafter simply referred to as “scaffolding plate 1”) for constructing a suspended scaffolding is configured as shown in FIGS. 12 to 15, and is formed from a square tube that supports both side edges of the flooring 2. A pair of girder side frames 3 and 3 and wives side frames 4 and 4 made of circular pipes connecting both ends of the girder side frames 3 and 3 are formed into a rectangular frame shape, and the flooring 2 is formed into the girder side frame 3 and 3, and a socket 4 a and a plug 4 b are formed at both ends of the wife side frame 4, and a center frame 5 made of a circular pipe disposed below the flooring 2. Both ends of the frame (hereinafter simply referred to as “frame 5”) are connected to the wife side frames 4 and 4.

As shown in FIG. 13, when constructing a suspended scaffold, the scaffold plates 1, 1 are connected in parallel in the extending direction of the elevated structure by alternately connecting the sockets 4 a and the plugs 4 b, and the rope 6 such as a chain or the like. Thus, it is suspended below the elevated structure. In order to enable suspension by the rope 6 such as such a chain, the floor material 2 is provided with a window hole 7 facing the frame 5 at a predetermined interval. A hanging metal fitting 8 facing each window hole 7 is provided. Therefore, the frame 5 is suspended through the metal fitting 8 by connecting the rope 6 to the hanging metal fitting 8.

As shown in FIG. 12, the hanging fitting 8 is composed of an oval annular fitting having an upper arc portion 8b and a lower arc portion 8c above and below the left and right straight portions 8a, 8a, using a steel rod or the like. By inserting the frame 5 in a loosely fitted state, it is between the raised position H pulled up from the flooring 2 through the window hole 7 and the lowered position L stored below the flooring 2. Thus, it is attached so as to be movable in the vertical direction.

Therefore, the hanging bracket 8 connects the scaffolding plate 1 to the elevated structure by connecting the cable 6 to the upper arc portion 8b in a state where the frame 5 is held from the lower side by the lower arc portion 8c at the raised position H. Suspend below.

By the way, as shown in FIG. 14, the scaffold board 1 is conveyed and stored in the state which laminated | stacked many scaffold boards 1 and 1 at the time of non-use. The hanging bracket 8 of the scaffold plate 1 before lamination is located at the lowered position L, and is suspended in a vertical posture in which the upper arc portion 8 b is locked to the frame 5. At this time, the length of the hanging metal fitting 8 is set to a length exceeding the thickness T of the scaffolding plate 1 (the vertical dimension of the girder side frame 3), and the lower circular arc portion 8c protrudes below the scaffolding plate 1. The

For this reason, when the scaffolding plate 1 is stacked, as shown in the figure, the suspension bracket 8 at the lowered position L is changed in posture so as to be inclined from the vertical posture with respect to the axis of the frame 5, and the scaffolding plate It is preferable to store so that it may fit in the interior space (thickness T) of the 1 girder side frame 3, and, thereby, it becomes possible to laminate | stack many scaffolding plates 1 and 1 low in bulk.

Japanese Examined Patent Publication No. 7-103679 Japanese Patent No. 2647801 Japanese Patent No. 2647802 Japanese Patent No. 2664642 Japanese Patent No. 3012827 Japanese Patent No. 4106133 Japanese Patent No. 5399865

As described above, the hanging metal fitting 8 is formed by bending a steel rod or the like so as to have an oval shape, and constitutes an endless annular body. Therefore, when the scaffolding plate 1 is manufactured, it is necessary to insert a predetermined number of hanging brackets 8 and 8 into the frame 5 in advance, and from this state, both ends of the frame 5 are welded to the wife side frames 4 and 4. Etc. are connected and fixed. In other words, after both ends of the frame 5 are fixed to the wives frames 4 and 4, the hanging metal fittings can no longer be attached or detached.

For this reason, in the production line of the scaffolding plate 1, if there is an error in the number of the hanging fittings 8 attached to the frame 5, and the error is found after both ends of the frame 5 are fixed to the wives frames 4, 4. Has a problem that it cannot be changed to the correct number.

In addition, as a result of repeated construction and dismantling of the suspension scaffold, damage to the scaffold plate 1 due to impacts or the like may occur and repair may be required, but when the suspension fitting 8 is damaged such as bending. Has a problem that it cannot be properly repaired because it cannot be replaced.

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

A hanging metal fitting 9 according to a comparative example is a non-annular member provided with a pair of legs 10b and 10b suspended from both ends of an arcuate upper portion 10a by bending a steel rod or the like into a substantially U-shape downward. 10 and a horizontal bar member 11 that is detachably fixed in a straddling state on the leg portions 10b and 10b. Specifically, the bolt portions 10c are formed at the lower end portions of the leg portions 10b and 10b, and the bolt portions 10c and 10c are inserted into both ends of the horizontal bar member 11 in a state where the lock nut 12 is screwed. 11a and 11a are inserted, and a fastening nut 13 is fastened to the insertion end.

Therefore, according to this comparative example, since the hanging metal fitting 9 allows the non-annular member 10 and the horizontal bar member 11 to be disassembled and assembled to each other, the non-annular member can be removed with the horizontal bar member 11 removed. 10 can be attached to and detached from the frame 5 of the scaffold plate 1, and the above-described problems 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, when the suspended scaffolding is constructed as shown in FIG. 6, the flat surface 11 b on the upper surface of the horizontal bar member 11 is pressed against the frame 5, so that the hanging metal fitting 9 is difficult to be inclined in the direction indicated by the illustrated arrow.

In general, depending on the construction conditions, the suspension scaffold does not always suspend all the ridges 6 in an accurate vertical direction, and the ridges 6 may be inclined as shown by the chain lines in the figure. The lower fitting 9 needs to be tiltable along the inclination direction of the rope 6. In this regard, since the hanging metal fitting 9 according to the comparative example is difficult to tilt, the rope is directed in the inclined direction with respect to the horizontal bar member 11 fixed in a state where the flat surface 11b is pressed against the lower surface of the frame 5. There is a risk that the non-annular member 10 receiving the tension of 6 breaks due to bending stress, or the fastening nut 13 is relaxed due to distortion in the bending direction.

The present invention provides a hanging bracket for a suspended scaffolding plate that solves the above-mentioned problems, and is constructed as a means for laying a flooring on top of a pair of girder-side frames. A frame made of a circular tube is provided on the side, and a window hole facing the frame is opened in the flooring, and a hanging bracket that is movable in the vertical direction between the raised position and the lowered position through the window hole is attached to the frame. A suspension scaffold plate for constructing a suspension scaffold by providing and suspending the suspension bracket with a rope, wherein the suspension bracket is a pair of legs suspended from both ends of the upper part suspended by the rope. A non-annular member having a portion and a horizontal bar member that is detachably fixed in a straddling state on the leg portion, and a bolt portion formed at a lower end portion of the leg portion of the non-annular member Insert it into the insertion holes provided at both ends, The lateral bar member is configured to fasten a fastening nut to an extended end, and the horizontal bar member includes both end portions provided with the insertion holes and an intermediate portion positioned between the both end portions, A flat receiving surface that presses the fastening nut in a surface contact state is formed, and an arc support surface that is curved upward at least with respect to the axis of the frame is formed on the upper surface of the intermediate portion facing the frame. It is in.

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

The arcuate guide surface may be formed by forming a spherical portion at the lower end of the bolt portion. Alternatively, the contact portion is configured by the lower surface of the intermediate portion of the horizontal bar member, and the lower surface of the intermediate portion is formed as an arc surface that curves downward with respect to the axis of the frame, and the arc guide is formed by the arc surface. A surface can be constructed.

Furthermore, it is preferable to form a curved concave portion along the surface of the circular tube of the frame on the upper surface portion of the intermediate portion, located between both end portions of the horizontal bar member.

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

At this time, the horizontal bar member 16 of the hanging metal fitting 14 is characterized in that it forms a deformed bar in which the arc support surface 21 is provided in the intermediate portion 16c and the flat receiving surfaces 20 are provided in both end portions 16a and 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 brought into pressure contact with the receiving surface 20 in a surface contact state, so that firm fastening is possible. Then, in a state where the scaffolding plate 1 is suspended by suspending the hanging metal fitting 14 by the rope 6, the arc support surface 21 of the horizontal bar member 16 is supported on the lower surface of the frame 5. Even when the hanging bracket 14 is suspended not only in the vertical direction but also from the inclined direction, the arc support 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 so that it may follow, there exists an effect that the breakage of the non-annular member 15, the loosening of the fastening nut 18, etc. are prevented, and safety is ensured.

It is a perspective view which shows the hanging metal fitting which concerns on 1st Embodiment of this invention in an exploded state. It is a perspective view which shows the use condition of the said hanging metal fitting. It shows the action when the hanging bracket 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 a sectional view in the ascending state. is there. The additional example of the hanging metal fitting which concerns on 1st Embodiment is shown, (A) is a front view of a 1st addition example, (B) is a front view of a 2nd addition example. The hanging metal fitting which concerns on 2nd Embodiment of this invention is shown, (A) is a front view, (B) is an enlarged view which shows a circular arc guide surface. 2A and 2B show the action when stacking scaffolding plates, FIG. 3A is a cross-sectional view showing a state in which a hanging bracket in a lowered position is suspended in a vertical posture, and FIG. It is sectional drawing which shows the effect | action by which attitude | position is changed toward a retracted attitude | position. It is a perspective view which shows the hanging metal fitting which concerns on 3rd Embodiment in an exploded state. It is a perspective view which shows the use condition of the said hanging metal fitting. The additional example of the hanging metal fitting which concerns on 3rd Embodiment is shown, (A) is a front view, (B) is an enlarged side view. The action | operation at the time of moving the hanging metal fitting which concerns on 3rd Embodiment toward the raising position from the lowered position made into the retracted state is shown, (A) is sectional drawing of a retracted state, (B) is raising It is sectional drawing of a state. 2A and 2B show the action when stacking scaffolding plates, FIG. 3A is a cross-sectional view showing a state in which a hanging bracket in a lowered position is suspended in a vertical posture, and FIG. It is sectional drawing which shows the effect | action by which attitude | position is changed toward a retracted attitude | position. The conventional suspension scaffold board is shown, (A) is a whole perspective view, (B) (C) is an enlarged view of the part in which the hanging metal fitting was provided. It is a perspective view which shows the method of constructing a suspension scaffold with the conventional scaffold board. The lamination method of the conventional scaffold board | plate is shown, (A) is a perspective view, (B) is sectional drawing of a lamination | stacking state. The comparative example with respect to this invention is shown, (A) is a perspective view which shows the decomposition | disassembly state of the hanging metal fitting which concerns on a comparative example, (B) is a perspective view which shows a use condition.

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

(Suspended scaffold board and suspended scaffold construction)
The hanging metal fitting of the present invention is used in place of the hanging metal fitting 8 provided on the frame 5 in the conventional hanging scaffold plate 1 described above with reference to FIGS. Since the structure of the scaffold board 1 and the construction method of a suspended scaffold are not different from the prior art, the above description is used.

(First embodiment)
1 to 3 show a hanging metal fitting 14 according to the first embodiment of the present invention. The hanging metal fitting 14 includes a non-annular member 15 having a pair of leg portions 15b, 15b suspended from both ends of an arcuate upper portion 15a by bending a steel bar or the like into a substantially U shape downward, It is comprised by the horizontal bar member 16 detachably fixed by the leg parts 15b and 15b in the straddling state.

The leg portions 15b and 15b form a bolt portion 15c at the lower end portion, and the horizontal bar member 16 has an insertion hole 16b penetrating the both end portions 16a and 16a, and a lock nut is formed on the bolt portions 15c and 15c. In a state where 17 is screwed, the bolt portions 15c, 15c are inserted into the insertion holes 16b, 16b, and fastening nuts 18, 18 are fastened to the insertion ends.

Therefore, the hanging metal fitting 14 allows the non-annular member 15 and the horizontal bar member 16 to be disassembled and assembled to each other, and can be attached to and 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, the fastening nut 18 preferably constitutes a so-called super slit nut having a slit 18a on the outer peripheral portion.

In the case of the first embodiment, the horizontal bar member 16 is formed with a flat upper receiving surface 19 and a lower receiving surface 20 on the upper surface portion and the lower surface portion of both end portions 16a, 16a, respectively, The fastening nut 18 is pressed against the receiving surface 19 in a surface contact state, and the fastening nut 18 is pressed against the lower receiving surface 20 in a surface contact state, whereby the bolt portion 15c of the non-annular member 15 and the horizontal bar member 16 are The both ends 16a can be firmly fastened.

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

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 the suspension metal fitting 14 is attached to the frame 5 of the scaffolding plate 1 and the suspension scaffold is constructed, the upper portion 15 a of the non-annular member 14. Is suspended by the rope 6 and the arc support surface 21 of the horizontal bar member 16 is brought into pressure contact with 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 hanging metal fitting 14 from the inclined direction as well as the vertical direction. Since the surface 21 easily rotates, the hanging metal fitting 9 can be tilted along the inclination direction of the rope 6. As a result, there is no risk of breakage of the non-annular member 15 or loosening of the fastening nut 18, and safety can be ensured.

Further, from the retracted posture in which the hanging bracket 14 is inclined at the lowered position L as shown in FIG. 3A, the posture is directed to the vertical posture where the hanging bracket 14 is raised at the raised position H as shown in FIG. When pulling up while changing, as shown in the figure, the hanging metal fitting 14 is constrained between the window hole 7 of the flooring 2 and the lower surface of the frame 5, and the arc support surface 21 of the horizontal bar member 16 is attached to the frame 5. It is possible to smoothly change the posture in the standing direction by sliding while easily rotating along the lower surface.

(Additional examples)
FIG. 4 shows an additional example of the hanging metal fitting 14 according to the first embodiment, and nut drop prevention means 22 is provided at the insertion end of the bolt portion 15 c inserted from the fastening nut 18.

In the case of the first additional embodiment shown in FIG. 4A, the nut drop prevention means 22 is constituted by a split pin 22a inserted and fixed at the insertion end of the bolt portion 15c. Even 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 prevention means 22 is a plastic hardener 22b made of a bond or other adhesive applied to the outer peripheral portion of the insertion end of the bolt portion 15c and cured. This makes it possible to prevent the fastening nut 18 from being loosened and prevented from falling off.

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

As shown in FIG. 5, the tip (lower end) of the bolt portion 15c of the non-annular member 15 constituting the hanging metal fitting 14 forms a spherical portion 23a rounded by forging or the like. An arc guide surface 23 that curves downward with respect to the axis 5 is configured.

By the way, when the scaffolding plates 1 and 1 when not in use are stacked for transportation and storage as described above, the scaffolding plate in which the hanging metal fitting 14 is in the vertical posture at the lowered position L as shown in FIG. 1 is laminated on the lower scaffolding plate 1a as shown in FIG. 6 (B), but according to the second embodiment, the suspension fitting 14 is smoothly changed in posture toward the inclined storage posture. be able to.

As described above, since the length dimension of the hanging metal fitting 14 is formed to a length exceeding the thickness T of the scaffold board 1 including the vertical dimension of the girder side frame 3, the scaffold board 1 is used as the lower scaffold board 1a. When mounted on the base plate, the circular arc guide surface 23 of the hanging metal fitting 14 in the vertical posture comes into contact with the floor plate 2 of the lower scaffolding plate 1a and moves upward as shown by a chain line in FIG. The upper part 15a of the 15 protrudes above the window hole 7. Therefore, when the operator lowers the scaffolding plate 1 while pushing the upper portion 15a with the fingertip or the like in the inclined direction as indicated by the arrow P in the figure, the arc guide surface 23 is along the floor plate 2 of the lower scaffolding plate 1a. While rotating, it slides as shown by the arrow F in the figure, and the hanging metal fitting 14 can be suitably guided toward the inclined storage posture.

(Third embodiment)
7 to 11 show a hanging metal fitting 14 according to a third embodiment of the present invention. The hanging metal fitting 14 includes a non-annular member 15 having a pair of leg portions 15b, 15b suspended from both ends of an arcuate upper portion 15a by bending a steel bar or the like into a substantially U shape downward, It is comprised by the horizontal bar member 16 detachably fixed by the leg parts 15b and 15b in the straddling state.

The leg portions 15b, 15b form a bolt portion 15c at the lower end portion, and the horizontal bar member 16 has insertion holes 16b penetrating through both end portions 16a, 16a, and the bolt portions 15c, 15c are inserted through the insertion portions. The holes 16b and 16b are inserted, and the fastening nuts 18 and 18 are fastened to the insertion ends.

Therefore, the hanging metal fitting 14 allows the non-annular member 15 and the horizontal bar member 16 to be disassembled and assembled to each other, and can be attached to and 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, the fastening nut 18 preferably constitutes a so-called super slit nut having a slit 18a on the outer peripheral portion.

The above configuration is the same as that of the above-described suspension fitting of the first embodiment, but the leg portion 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. The both ends 16a of the horizontal bar member 16 are clamped by the contact fixing portion 24 and the fastening nut 18 from above and below by being inserted into the insertion hole 16b and fastening the fastening nut 18 to the insertion end. It is composed. Therefore, the lock nut 17 as in the first embodiment is not required. In the example shown in the figure, the contact fixing portion 24 is a metal plate or the like fixed 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. You may comprise by the rib thru | or protrusion formed by.

Therefore, in the case of the third embodiment, the horizontal bar member 16 has a flat receiving surface 20 on the lower surface portions of both end portions 16a, 16a, and the fastening nut 18 is in surface contact with the receiving surface 20. It comprises so that it may be press-contacted, and, thereby, the fastening of the bolt part 15c of the non-annular member 15 and the both ends 16a of the horizontal bar member 16 is attained.

At this time, it is preferable to provide nut drop prevention means 22 at the insertion end of the bolt portion 15c inserted from the fastening nut 18, as in the additional embodiment shown in FIG. In the case of the illustrated example, the nut drop prevention means 22 is constituted by the split pin 22a inserted and fixed to the insertion end of the bolt portion 15c. However, the plastic made of the adhesive or the like as described above with reference to FIG. You may comprise with a hardening | curing agent.

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

The lower surface portion of the intermediate portion 16c constitutes the lowermost end portion of the hanging metal fitting 14, that is, swells downward so as to be positioned below the insertion lower end of the bolt portion 15c inserted from the fastening nut 18. The arc guide surface 23 is provided by forming the lower surface portion into 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 the hanging bracket 14 is attached to the frame 5 of the scaffolding plate 1 and the suspension scaffold is constructed, the upper portion 15 a of the non-annular member 14. The arc support surface 21 is pressed against the lower surface of the frame 5 in a state in which the curved recess 25 of the horizontal bar member 16 extends along the circumferential direction of the frame 5. Accordingly, the horizontal bar member 16 can be rotated around the center of the circular tube of the frame 5 via the curved recess 25 with respect to the direction in which the non-annular member 14 is suspended. 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 hanging metal fitting 14 from the inclined direction as well as the vertical direction. Since the surface 21 easily rotates, the hanging metal fitting 9 can be tilted along the inclination direction of the rope 6. As a result, there is no risk of breakage of the non-annular member 15 or loosening of the fastening nut 18, and safety can be ensured. In addition, since the arc support surface 21 is formed along the curved concave portion 25, it is in line contact with the circumferential direction of the lower surface of the frame 5, and preferably supports the frame 5 in the holding state.

As shown in FIG. 10 (A), the hanging metal fitting 14 is changed from the retracted posture inclined at the lowered position L to the vertical posture where it is raised at the raised position H as shown in FIG. 10 (B). When pulling up, the hanging metal fitting 14 is restrained between the window hole 7 of the flooring 2 and the lower surface of the frame 5, and the arc support surface 21 of the horizontal bar member 16 is the lower surface of the frame 5 as shown in the figure. It is possible to change the posture smoothly in the standing direction by sliding while easily rotating along the.

When the scaffolding plates 1 and 1 when not in use are stacked for transportation and storage as described above, the scaffolding plate 1 in which the hanging bracket 14 is in the vertical posture at the lowered position L as shown in FIG. As shown in FIG. 11 (B), it is laminated on the lower scaffolding plate 1a. At this time, the suspension fitting 14 can be smoothly changed in posture toward the inclined storage posture.

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

DESCRIPTION OF SYMBOLS 1 Scaffold board 2 Floor material 3 Girder side frame 4 Wife side frame 4a Socket 4b Plug 5 Frame (center frame)
6 Line 7 Window hole 8 Hanging bracket (conventional example)
9 Hanging bracket (comparative example)
14 Suspension fitting (present invention)
15 Non-annular member 15a Upper part 15b Leg part 15c Bolt part 16 Horizontal bar member 16a Both end parts 16b Insertion hole 16c Middle part 17 Lock nut 18 Fastening nut 18a Slit 19 Upper receiving surface 20 Lower receiving surface 21 Arc support surface 22 Nut drop prevention means 22a Split pin 22b Plastic hardener 23 Arc guide surface 23a Spherical surface portion 23b Arc surface 24 Contact fixing portion 25 Curved recess

Claims (5)

A floor material is straddled on the upper part of a pair of girder frames, a frame (5) made of a circular tube is provided below the floor material (2), and a window hole (7) facing the frame is opened in the floor material. A suspension bracket (14) that is movable in the vertical direction between the raised position and the lowered position through the window hole is provided on the frame, and the suspension bracket is suspended by a rope to suspend the suspension scaffold. In the suspended scaffolding board to be built,
The hanging bracket (14) is a non-annular member (15) provided with a pair of legs (15b, 15b) suspended from both ends of the upper part (15a) suspended by the rope (6), It consists of a horizontal bar member (16) that is detachably fixed in a straddling state on the legs,
Bolt portions (15c, 15c) formed at the lower ends of the leg portions of the non-annular member (15) are inserted into both end portions of the horizontal bar member (16) through insertion holes (16b, 16b), and the bolt portions It is configured to fasten the fastening nut (18) to the insertion end of
The horizontal bar member (16) includes both end portions (16a, 16a) provided with the insertion holes, and an intermediate portion (16c) positioned between the both end portions, and the fastening nuts at the both end portions (16a). A flat receiving surface (20) that press-contacts (18) in a surface contact state is formed, and an upper surface portion facing the frame (5) of the intermediate portion (16c) is curved upward at least with respect to the axis of the frame A hanging bracket for a suspended scaffolding board, characterized in that it forms an arc supporting surface (21). The length of the hanging bracket (14) is formed in a length exceeding the thickness T of the scaffolding plate (1) including the vertical dimension of the girder side frame (3), and is defined as the lowered position (L). In a configuration in which a plurality of scaffolding plates (1) can be stacked up and down in a state where the hanging bracket (14) is in an inclined posture inclined with respect to the axis of the frame,
At least one of the bolt part (15c) and the horizontal bar member (16) of the hanging bracket (14) in the lowered position (L) is contacted with the flooring (2) of the scaffolding plate (1a) located in the lower layer. It has an abutting part that comes into contact,
The hanging bracket for a suspended scaffolding plate according to claim 1, wherein the contact portion is formed with an arc guide surface (23) that curves downward with respect to an axis of the frame. The suspension scaffolding plate suspension according to claim 2, wherein a spherical surface portion (23a) is formed at a lower end of the bolt portion (15c), and the circular arc guide surface (23) is constituted by the spherical surface portion. Hanging bracket. The abutting portion is formed by the lower surface of the intermediate portion (16c) of the horizontal bar member (16), 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 suspension bracket plate suspension metal fitting according to claim 2, wherein the circular arc guide surface (23) is constituted by the above. A curved recess (25) is formed along the circular tube surface of the frame on the upper surface of the intermediate portion (16c), located between both ends (16a, 16a) of the horizontal bar member (16). The hanging bracket for a suspended scaffolding plate according to claim 1, 2, 3 or 4.

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