JP2540573Y2 - Temporary scaffolding device under slab - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary scaffolding device under a slab using a deck plate as a lower frame of a slab. To a temporary scaffolding device.

[0002]

2. Description of the Related Art Conventionally, when a work such as a duct or electric wiring is suspended below a concrete slab (ceiling side), a scaffold is assembled from a floor surface to a lower side of the slab by steel pipes or logs. . However, if the scaffold is temporarily installed on the floor surface in this way, the scaffold will hinder the work on the floor side such as finishing the floor surface, and will hinder traffic and transport of materials, etc. It took a lot of time to assemble and remove it, which caused a rise in construction costs.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a temporary scaffolding device under a slab which can solve the above-mentioned conventional problems. The reference numerals are used to denote the hanging metal fittings 4 which are detachable from the projecting ridges 3 which extend downward from the deck plate 2 constituting the lower slab formwork, and which are detachable from the hanging metal fittings 4. And a hanging rope 5 for suspending a scaffolding plate supporting material suspended from the hanging rope locking tool 14, and the hanging metal fitting 4 includes a metal fitting body 8, A pair of left and right holding pieces 9 that can be opened and closed freely provided on the metal fitting body 8;
A bolt 12 protruding downward from the metal fitting body 8 and closing the holding piece 9 by pulling down; and a long nut 13 screwed into the bolt 12 below the metal fitting body 8, and The fixture 14 is configured to be coupled to the hanging bracket 4 by a bolt 15 screwed into the long nut 13 from the lower end side.

[0004]

Embodiments will be described with reference to the drawings.
FIG. 1 shows a temporary scaffolding device under a slab. In this figure, reference numeral 1 denotes a concrete slab, on which a deck plate 2 is integrally attached on the lower surface, and a plurality of cross sections projecting downward from the deck plate 2. The downwardly extending ridges 3 are provided at regular intervals. In the scaffolding device of the present invention, for example, hanging metal fittings 4 are fixedly attached to the left and right ridges 3 at regular intervals, with one intermediate ridge 3 therebetween, and the hanging cable 5 is disengaged from each hanging metal 4. As shown in FIG. 2, both ends of a scaffold plate support member 6 made of a steel pipe are hung by a pair of left and right hanging cables 5 as shown in FIG.
The scaffold plate 7 is mounted on the top.

As shown in FIGS. 3 to 5, each of the hanging brackets 4 has a pair of right and left holding pieces 9 mounted on a bracket body 8 having a U-shaped cross section and two supports spaced horizontally in a horizontal direction. A leaf spring 11 for supporting the pair of holding pieces 9 in the closing direction is interposed between the holding pieces 9 and the metal fitting body 8 while being pivotally supported by a shaft 10 so as to be freely openable and closable. 8, the head of a locking piece locking bolt 12 vertically penetrated into the center between the two support shafts 10 is positioned on the inner end of the both holding pieces 9 and protrudes below the metal fitting body 8. Approximately the upper half of the long nut 13 is screwed into the bolt 12 to be fixed, and the lower half of the long nut 13 is further fitted with the ring-shaped hanging cable anchor 1.
4 is screwed together with a bolt 15 attached thereto.

As shown in FIG. 5, in the state in which the long nut 13 is loosened, the left and right holding pieces 9 are held in the closed position as shown by the solid line by the urging force of the leaf spring 11, as shown in FIG. In addition, since there is a gap between the lower surface of the head of the bolt 12 and the inner ends of the left and right holding pieces 9, a downward load exceeding the urging force of the leaf spring 11 is applied to the upper ends of the holding pieces 9. As a result, the upper end swings around the support shaft 10 in a direction away from each other, that is, opens, and assumes an open posture as shown by the imaginary line.
It returns to the original closed position with the urging force of 1. Further, when the long nut 13 is tightened from the state shown in FIG. The left and right holding pieces 9 are locked in a closed position.

Therefore, in order to attach the suspension fitting 4 to the downwardly extending projection 3 of the deck plate 2, the long nut 13 is loosened in advance, and the projection of the deck plate 2 is held by the long nut 13. When the upper end inclined portions 9a of the left and right holding pieces 9 are pressed against the ridges 3 against the bottom corners of the triangular ridge 3, the inclined portions 9a of the both holding pieces 9 are pressed.
The two holding pieces 9 are opened by a downward load acting on a.
The triangular ridge 3 is guided and guided by the inclined portion 9a, and rushes between the two holding pieces 9, whereby the suspension fitting 4 is temporarily fixed. The mounting position is adjusted while sliding the hanging metal fitting 4 in the temporarily fixed state along the ridge 3. After the adjustment of the mounting position, the long nut 13 is rotated and fastened. By fastening the long nut 13, both holding pieces 9 are fixed in a closed state as shown in FIG. After that, this long nut 13
As shown in FIG. 5, a bolt 15 to which a hanging cable anchor 14 is attached is screwed into the lower half part of the cable and tightened.

On the other hand, hooks 16 are fixedly connected to both ends of each of the hanging lines 5 as shown in FIG. Thus, one end of each hanging cable 5 is passed through the hanging cable locking device 14,
In addition, the other end is wound around the scaffold plate support member 6, and after adjusting the length, the hooks 16 at both ends are engaged with and fixed to the link 5 a constituting the hanging cable 5 as shown in FIG. 6. .

When the scaffold plate support member 6 is supported at a predetermined height by each of the hanging cables 5, the scaffold plate 7 is mounted on the scaffold plate support member 6 as shown in FIGS. Finish the assembly of the lower temporary scaffolding device. A person rides on the scaffold plate 7 of the scaffold device assembled in this manner, and the lower side (ceiling side) of the slab.
Can be used to suspend ducts and electrical wiring.

In order to move the scaffolding device to another place after completing the work at a predetermined location, or to remove the scaffolding device after finishing all the work, remove the scaffolding plate 7 and remove each scaffolding plate. Pull out the support material 6 from the hanging cable 5, remove the hanging cable 5, loosen the long nut 13 of each hanging metal 4, and move each hanging metal 4 to the required position along the ridge 3 of the deck plate 2. In the case of removal, each hanging metal fitting 4 may be pulled downward and pulled out from the ridge.

In this embodiment, a chain is used as the suspension cable, but a rope or any other suitable material may be used. A leaf spring 1 for urging the holding piece 9 of the hanging member 4 in the closing direction.
1 is not essential to the present invention.

[0012]

[Operation and effect of the present invention] As described above, by using the temporary scaffolding device under the slab of the present invention, the projecting ridges and suspensions having a cross section that expands below the deck plate that also serves as the concrete formwork under the slab and project downward. Using metal fittings and slings,
The work scaffold can be temporarily installed at an appropriate height below the deck plate. In particular, according to the configuration of the present invention, the closing piece of the hanging metal fitting to be locked to the ridge of the deck plate is closed. Since the hanging cable anchor is hung using a bolt on the long nut, not only can the number of parts be reduced and the cost can be reduced, but also the holding piece can be rotated by tightening the long nut in the tightening direction. After the closing movement, the bolt is screwed into the long nut to connect the hanging rope locking tool, and the bolt screwing direction is the tightening direction of the long nut. There is no risk of sagging, and safety is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a temporary scaffolding device under a slab according to the present invention.

FIG. 2 is a perspective view showing a lower portion of the scaffold device.

FIG. 3 is a perspective view showing an example of a hanging bracket.

FIG. 4 is a vertical sectional side view of the hanging bracket.

FIG. 5 is a vertical sectional front view showing an operating state of the above-mentioned hanging bracket.

FIG. 6 is a perspective view showing a mounting state of a suspension cable in the scaffolding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slab 2 Deck plate 3 Spreading ridge below 4 Suspension metal fitting 5 Hanging cable (chain) 6 Scaffolding board support material 7 Scaffolding board 8 Metal fitting main body 9 Left and right pair of holding pieces 11 Leaf spring 12 Holding piece closing operation bolt 13 Long nut 14 Hanging cable anchor 15 Bolt for hanging cable anchor

Claims (1)

(57) [Scope of request for utility model registration] 1. A deck plate constituting a lower slab formwork.
A hanging hook that can be attached to and detached from a ridge that extends downward and projects downward.
And a suspension cord locking device removably connected to the lifting device
And a scaffold plate support suspended from the suspension
A hanging cable, and the hanging metal fitting is provided on the metal fitting main body and the metal fitting main body.
And a pair of left and right holding pieces that can be opened and closed
A bolt that protrudes and closes the holding piece by pulling down
And a long nut screwed into the bolt below the bracket body.
And the hanging cord locking tool is screwed into the long nut from the lower end side.
A temporary scaffolding device under the slab, which is connected to the hanging metal by a bolt .