JPH033788B2 - - Google Patents

Description

[Detailed Description of the Invention] In the conventional method of assembling formwork for beams in steel-framed reinforced concrete structures, a suspended scaffold is attached directly to the steel beam, and workers perform final tightening of the steel frame and assembly of reinforcing bars on the suspended scaffold. When the work is completed, the suspended scaffolding is removed and the beam formwork is being assembled, so in order to assemble the beam formwork, the scaffolding must be rebuilt from the floor using stepladder scaffolding, etc. Not only is there a lot of waste because the scaffolding is not consistent, but there are also safety issues as construction is generally done on unstable scaffolding. There were some shortcomings.

Therefore, in order to eliminate the above-mentioned defects, the present invention removably connects a beam formwork receiver to a steel beam using a separator device and mounting bolts attached to the separator device, and attaches and detaches a suspended scaffold to the beam formwork receiver. This allows workers to perform work such as final tightening of steel frames, assembling reinforcing bars, assembling beam forms, and assembling slab formwork on a suspended scaffold. You can work safely by waiting for the mold to harden and removing the formwork.

Furthermore, the beam bottom formwork is assembled by pushing up an arbitrary number of joist supports of the beam formwork support with wedges, and the joist supports at appropriate locations are lowered in advance of the period in which the beam bottom support remains. This makes it possible to easily remove the joists of the beam bottom formwork and dismantle the beam side formwork while maintaining the safety of the suspended scaffolding, which improves work efficiency and safety by utilizing materials effectively. The present invention relates to a method for attaching a suspended scaffold in a formwork for a steel-framed reinforced concrete structure, and a suspended scaffolding device, which are characterized in that the suspended scaffolding is secured.

To explain the structure of one embodiment of the present invention shown in the drawings, A indicates a slab of a steel reinforced concrete structure, 1 is a weir plate of the slab, 2 is a joist, and 3 is a beam.

B shows a beam, 4 and 5 are the beam side weir plate and the beam bottom weir plate, and 6 is a steel beam in the form of a construction, with projection nuts 7 on the middle part of both sides, and connecting metal on the bottom surface. Left and right nuts 9 connected by 8 are respectively arranged in parallel at appropriate intervals along the longitudinal direction of the steel beam 6. 1
0 is the assembled reinforcing bar of beam B, 11 is horizontal, 12, 13
are upper and lower formwork clamping fittings, and 14 is a joist.

Reference numeral 15 denotes a rectangular cylindrical beam formwork receiving flap for the beam B. Stoppers 16 are attached to both ends of the beam and are removable and protrude forward and backward, and a hanging scaffold mounting bracket 17 is attached to the lower part of the center. Set up 18 and 19 are the joist holders in the center and on both sides, and the center joist holder 18 is
It is formed into a square shape and fits into the beam formwork receiving flap 15, and the vertical holes 20 of both vertical pieces and the beam formwork receiving flap 1 are connected to each other.
The bolts 21 are inserted into the through holes 5 and fit into the beam formwork receiving flaps 15 so as to be movable up and down. It is fitted in such a way that it can move horizontally and vertically. On the other hand, a wedge hole is provided in the upper center of the joist holders 18 and 19, and rising edges are provided on both side edges of the upper piece. 2
A two-stage wedge 2 is driven into the wedge holes of the joist holders 18 and 19, and is connected to the joist holders 18 or 19 through a chain 23.

A indicates a separator device, and 24 is a separator on both sides having screws installed at both ends of the separator device a, and one half of the center screw hole of the terminal 25 is screwed into one end of the separator. 26 is a mounting bolt provided with threads at both ends, and 27 is a nut screwed into the thread at one end of the mounting bolt 26.

b shows a hanging scaffold frame of the hanging scaffold, 28 is a horizontal rod for supporting the scaffold plate of the hanging scaffold frame b, and handrail support columns 29 are erected on both sides of the frame, and support rods 30 are erected on both sides. Attach the hanging members 3 on both sides to the support rods 30 on both sides.
Attach the lower ends of 1 with bolts 32, respectively. 33 is a scaffold board, 34 is a handrail lever, and 35 is a bolt for attaching a hanging scaffold.

Next, its effect will be explained.

In the case of pre-assembled steel frames, once the assembly of the steel beams 6 is completed, (1) Separators 2 with terminals 25 are installed on both sides.
4 into the nut 9.

(2) After lifting the beam bottom weir plate 5 to the position of the terminal 25, tighten the other end screw of the mounting bolt 26 onto the beam bottom weir plate 5.
the other half of the center screw hole of the terminal 25.

(3) Drive in the wedge 22 and attach the joist supports 18 and 19.
In the raised state, the beam formwork catcher 1
5 are fitted into the mounting bolts 26 on both sides, and a nut 27 is suitably screwed into the screw at one end of the mounting bolt 26 to temporarily install the beam form receiving flap 15.

(4) After inserting the joists 14 between the beam bottom dam plate 5 and the joist holders 18 and 19, screw the nuts 27 to secure the joists 14 and joist holders 1 of the beam bottom dam plate 5.
The beam formwork receiving flaps 15 with 8 and 19 are raised integrally and the beam bottom weir plate 5 is applied to the terminal 25, and the beam bottom weir plate 5 of the steel beam 6 is removed by the separator device a.
The beam bottom formwork is finally fixed to the steel beam 6 by forming an interval equal to the thickness of the concrete covering between them.

(5) Attach the upper ends of the hanging members 31 on both sides of the scaffolding frame b to the mounting brackets 17 with the bolts 35, then place the scaffolding board 33 across the horizontal beams 28 of the scaffolding frame b, and attach them to the support columns 29. A hanging scaffold is constructed by attaching the handrail rods 34.

In addition, if the steel beam is not pre-assembled, instead of the above method, before installing the steel beam 6, hang it on a stepladder on both sides of the steel beam 6 on the floor and operate the steel beam 6 in the same manner as above. The separator device a, the beam bottom weir plate 5, the joist 14, the beam formwork support 15 with joist supports 18 and 19, the hanging scaffolding, etc. are installed as one unit, and the assembled steel beam 6 is lifted up by a lifting device etc. You can also build a steel frame.

Therefore, on the scaffolding board 33, the worker sequentially tightens the steel beams 6, assembles the reinforcing bars 10, and
Formwork assembly for beam B using beam side weir plate 4, side beam 11, fastening fittings 12, 13, etc., beam 3 for slab A,
Work such as assembling the formwork by attaching the joists 2 and the weir plate 1 is performed to complete the formwork assembly of the structure.

After the concrete has been poured and the concrete has hardened, the worker (1) lowers the beam 3 of slab A on the scaffolding board 33 to remove the joists 2, and then lowers the beam 3. Remove.

(2) Operate the wedges 22 of the joist holders 19 directly below the beam side weir plates 4 on both sides, and lower the joist holders 19 with the lower end of the wedge 22 facing the joist holders 19, and lower the joist holders 19 to the beam side dam plates 4. Remove the board 4, side beam 11, etc. and dismantle the beam side formwork.

(3) Remove weir plate 1 of slab A.

(4) Remove scaffolding board 33 and scaffolding frame b.

(5) Operate the wedge 22 of the central joist holder 18 in the same manner as above to lower the joist holder 18 and remove the joist 14.

(6) Remove the nut 27 and install the joist supports 18 and 19.
The scaffolding and the formwork can be dismantled by removing the attached beam formwork receiving flap 15 and then sequentially removing the mounting bolts 26 and the beam bottom weir plate 5.

Note that the separator device is not limited to the structure of the separator device a described above, and other suitable structures using conventional bolts that fit into the steel beams 6 may be used for the separator device. works in the same way as above.

In addition, the hanging members 31 on both sides of the hanging scaffold frame b are H-shaped,
It is also possible to have a configuration in which they are combined into a shape, an x-shape, or the like.

Since the present invention provides a suspended scaffold in the formwork of a steel-framed reinforced concrete structure as described above, at the same time as the assembly of the steel frame of the concrete structure is completed, the beam formwork receiver and A suspended scaffold is installed, and workers can perform tasks such as final tightening of steel frames, assembling reinforcing bars, assembling beam forms, and assembling slab forms on the suspended scaffold. In addition, it is possible to pour concrete as it is, wait for the concrete to harden, and then remove the formwork, which not only shortens the construction period of concrete, but also saves time and labor. It is economical, and since the beam formwork support and suspended scaffolding are attached to the steel frame using separator devices and mounting bolts, their support is reliable and solid, so workers can work safely and securely on the suspended scaffolding. be able to.

Further, even if the shape and dimensions of the joists used in the beam bottom form change, the mounting bolts can be used without having to be replaced, which is convenient for work.

Furthermore, since the beam bottom formwork is assembled by pushing up an arbitrary number of joist supports that fit into the beam formwork receivers using wedges, the joist supports can be lowered after the formwork remains in the concrete for a period of time. To easily remove the joists of the beam bottom formwork and dismantle the formwork while maintaining the stability of the suspended scaffold without loosening the nuts of the mounting bolts of the beam formwork support. Therefore, workability is improved, and
Safety is ensured.

In addition, when dismantling beam side formwork or slab support,
The beam side formwork and slab formwork can be easily dismantled by lowering only the joist support directly below the beam side formwork. The slab formwork can be dismantled and the materials can be used for the next construction, allowing for effective use of materials.

Furthermore, the number of joist supports installed on a beam formwork support can be increased or decreased as needed, and the number of joist supports installed in a beam formwork receiver can be increased or decreased depending on the need. It is possible to receive and support the overlapping parts of the ends of the joists, and the joist supports slide freely along the beam formwork supports, so you can set the position of the joists to suit the beam width. To reliably support a joist with a joist holder.

Moreover, it has a simple structure, can be manufactured easily and inexpensively, can be easily attached and detached, and is firmly fixed.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a beam formwork of a steel-framed reinforced concrete structure showing one embodiment of the present invention, Fig. 2 is an enlarged side sectional view of the joist receiving part at the center thereof,
The figure is an enlarged side sectional view of the side joist receiver. 5... Beam bottom weir plate, 6... Steel beam, 15... Beam formwork support, 18, 19... Joist support, 22...
... Wedge, a... Separator device, 26... Mounting bolt, b... Hanging scaffolding frame, 31... Hanging material, 33... Scaffolding board.

Claims (1)

[Scope of Claims] 1. A beam formwork catch plate is removably connected to a steel beam by a separator device and a mounting bolt that is detachably attached to the separator device, and the beam formwork catch plate is fitted into the beam form catch plate. Push up any number of joist supports with wedges to assemble the beam bottom form,
A method for attaching a suspended scaffold in a formwork for a steel-framed reinforced concrete structure, comprising removably attaching the suspended scaffold to the beam formwork receiving area. 2. A steel beam and a beam formwork receiver located below are removably connected by a separator device and a mounting bolt that is removably attached to the separator device, and any number of joists are attached to the beam formwork receiver. Fit the support so that it can move laterally and vertically, drive a wedge between the beam formwork support and the top of the joist support so that it can be inserted and removed, and attach the hanging material of the suspended scaffolding frame to the beam formwork support. A suspended scaffolding device for a formwork of a steel-framed reinforced concrete structure, characterized in that a scaffolding board is mounted on the suspended scaffolding frame in a detachable manner, and a scaffolding board is placed on the suspended scaffolding frame.