JPH0449322Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is suitable for use when producing cantilevered concrete structures such as cantilevered concrete slabs, which are typified by the balconies and balconies of housing complexes, hotels, and hospitals. Until the concrete structure develops the specified strength, it is attached to formwork and used for construction of return formwork and concrete pouring work for the concrete structure, until the concrete structure develops the specified strength. The rest relates to a scaffold frame in a scaffold that is supported by the concrete structure and used for dismantling and removing formwork, exterior work, etc. Specifically, the formwork for producing the cantilevered concrete structure and the mounting part that can be selectively attached to the produced cantilevered concrete structure are installed at appropriate intervals in the protruding direction of the cantilevered concrete structure. The present invention relates to a scaffolding frame for a cantilevered concrete structure.

[Conventional technology]

In a conventional scaffolding frame for a molded concrete structure of this type, both of the above-mentioned attachment parts are fixedly connected to the shoring of the formwork before the formwork is dismantled or removed;
After dismantling and removing the formwork, it was fixedly connected to the concrete structure via anchor bolts (for example, Publication of Utility Model Publication No. 58-34189).

However, when using the above-mentioned conventional scaffolding frame, the poured concrete structure develops a predetermined strength, making the formwork unnecessary, making it easier to work on the underside of the concrete structure, and making it easier to use the formwork. When dismantling and removing the formwork in order to repurpose it, it is necessary to release the fixed connection of both attachment parts to the shoring, which makes dismantling and removing the formwork, especially the shoring, a hassle. It had some flaws when I let it go.

[Problem that the invention attempts to solve]

The present invention was developed in view of the above circumstances, and its purpose is to improve the workability of dismantling and removing formwork.

[Means for solving problems]

The characteristic configuration of the scaffolding frame for cantilevered concrete structures according to the present invention, which was taken to achieve the above object, is that the mounting portion located on the tip side of the cantilevered concrete structure among the mounting portions is attached to the formwork. As a fixture, a bolt is provided that penetrates the weir plate of the formwork in the thickness direction and is buried and fixed at one end in the prepared concrete structure, and the lower formwork on which the formwork is placed is installed. The support part supported by the support part via a strut is positioned directly below or almost directly below the distal end side attachment part when viewed in the width direction orthogonal to the protrusion direction, and supports the distal side attachment part. It is located at a point connected to the attachment part on the tip side. The effects and effects thereof are as follows.

[Effect]

When dismantling or removing the formwork, it is necessary to dismantle and remove the shoring to make it easier to work underneath the concrete structure, but even if some of the shedding boards remain, the Focusing on the point that it does not interfere with side work, the attachment part on the tip side is attached to the weir plate instead of the shoring with bolts that are embedded in the concrete structure and act as anchor bolts. By dismantling and removing the formwork while leaving the weir plate portion to which the side attachment portions are attached, there is no need to remove the tip side attachment portions from the formwork when the formwork is dismantled and removed. Moreover, when the concrete structure has developed a specified strength and the bolts are firmly attached to the concrete structure, the mounting strength of the attachment part on the tip side is ensured to ensure that the load placed on the scaffold can be reliably supported. However, if the concrete structure does not have the specified strength and the attachment part on the tip side is supported only by attachment to the sheathing, the shedding will be However, according to the present invention, the support part supported by the lower formwork mounting part via the column is Since it is located directly under or almost directly below the side attachment part and is connected to the tip side attachment part in a state that supports the tip side attachment part, this support part can be attached to the lower formwork via the support. By supporting the mounting part, it is possible to compensate for the support strength until the distal end side mounting part is supported by the concrete structure via the bolt. In other words, by providing the support part, the attachment part on the tip side can be attached only to the weir plate.

[Effect of idea]

Therefore, the present invention enables the use of scaffolding by ensuring sufficient installation strength both until and after the concrete structure develops a predetermined strength. By reducing the number of attachment points that are attached to the support of the formwork until the specified strength is achieved, only the base-end attachment section is used, which improves the workability of dismantling and removing the formwork after the concrete structure has achieved the specified strength. As a result, we have been able to provide a scaffolding frame for cantilevered concrete structures that can shorten the construction period.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

A is the balcony B on each floor in an apartment complex
(An example of a cantilevered concrete structure) This is a formwork for producing a cantilevered concrete structure, and C is a scaffold placed outside this formwork A.

The formwork A is composed of a weir plate 1 and a shoring 2 that supports it on the ground or on a lower floor balcony B that has been prepared. The shoring 2 includes a plurality of joists 2a positioned along the protruding direction of the balcony B at appropriate intervals in the width direction of the balcony, and on which the shedding boards 1 are placed and supported; It is composed of two large pullers 2b that are positioned at appropriate intervals in the balcony projecting direction and support the joists 2a, and a plurality of pipe supports 2c that support these large pullers 2b and whose lengths are freely adjustable. has been done. Note that the base end side of the weir plate 1 is nailed to the beam side formwork A'.

The scaffolding C includes a plurality of pipe scaffolding frames 3 arranged at appropriate intervals in the width direction of the balcony, and steel scaffolding boards 4 spanning between these scaffolding frames 3.
It is composed of.

The scaffolding frame 3 has attachment portions 3A and 3B at two locations appropriately spaced in the balcony protrusion direction.
and a mounting section 3C for the scaffold board 4 at a location outside the mounting section 3A on the distal end side, and a lower mounting section for mounting and supporting the formwork A at a location below the mounting section 3A on the distal end side. In other words, a support part 3D is provided to be supported on the ground or a balcony B on a lower floor via a pipe support 5.

The attachment portion 3A on the tip side passes through the sheath plate 1 in the thickness direction and can be attached near the tip of the sheath plate 1 with two bolts 6 buried and fixed in the balcony B. It is constructed with an angle 7 fixed to the upper end of the first pipe _P1 , which is positioned approximately at the center in the balcony projecting direction and is oriented upwardly.

The attachment portion 3B on the proximal end side includes a first attachment portion 3a that can be fixedly connected to the main drawer 2b via a clamp fitting 8, and a second attachment portion 3b that can come into contact with the weir plate 1 from below. The first attachment portion 3a is configured with a second pipe P2 fixed to the first pipe _P1 in a horizontal orientation, and the second attachment portion _3b is configured with a second pipe P2 fixed to the first pipe P1.
The third pipe is fixed to the free end of pipe _P2 and is in an up-down position.
It is composed of a pipe P ₃ and a screw-type jack 9 which is inserted and held into the third pipe P ₃ from above and whose upper end base plate 9 a can be brought into contact with the sheath plate 1 .

The mounting section 3C is configured with a fourth pipe _P4 in a horizontal orientation, which is fixed to the first pipe _P1 .

The support part 3D is into which the upper end part of the pipe support 5 can be inserted from below, and
It is composed of the lower end of the pipe _P1 . In other words, when viewed in the width direction perpendicular to the balcony projecting direction, it is connected to the distal end mounting portion 3A in a state where it is located directly under or almost directly below the distal end mounting portion 3A and supports the distal end mounting portion 3A. ing.

Further, a fifth pipe P5 for a handrail is fixed to the free end of the fourth pipe _P4 , and a change clamp 11 for fixing the handrail 10 is fixed to the upper end of the fifth pipe _P5 . between near the lower end of _P5 and near the lower end of first pipe _P1 , and
Near the lower end of the third pipe _P3 and the first pipe _P1
Reinforcement pipes P in diagonal postures are suspended between near the lower ends of the respective parts.

As shown in FIG. 4, the clamp fitting 8 has a U-shaped clamp 8B fixed to the upper end of the pipe-shaped main body 8A in an up-down position, which can be fixed to the main drawer 2b via a tightening bolt 8a. A change clamp 8C, which can be fixed to the second pipe _P2 , is fixed to the lower end of the main body 8A.

The attachment portion 3A on the tip side using the bolt 6, that is, the means for attaching the angle 7 to the sheir plate 1 is as follows:
As shown in FIGS. 2 and 3, the insert 12 that acts as an anchor is tightened and screwed into the bolt 6 to form a cutout b (see FIG. 1) on the lower surface of the balcony B. 13 is a means for attaching the angle 7 to the weir plate 1. In other words, the bolt 6 is not directly fixed to the balcony B, but is fixed to the balcony B by screwing to the insert 12, and can be removed from the balcony B by screwing and unscrewing from the insert 12. .

The scaffolding frame 3 is attached to the formwork A by attaching the distal end side attachment part 3A to the weir plate 1 and fixedly connecting the first attachment part 3a to the main puller 2b via the clamp fitting 8. Support part 3 in state
By inserting the pipe support 5 into D and supporting it on the mounting part, it develops support strength that can withstand the load placed on the scaffold, and the fixed connection of the first attachment part 3a to the main puller 2b allows the load placed on the scaffold to be supported. After the balcony B is prevented from rotating around the support part 3D and has developed a predetermined strength, the attachment part 3
The attachment of A to the balcony B via the bolts 6 provides support strength against the scaffolding load, and the contact of the second attachment portion 3b, that is, the jack 9 to the weir plate 1, prevents the loading of the scaffolding from occurring. It is configured to be prevented from rotating around the attachment portion 3A on the distal end side.

In addition, of the weir plate 1, the scaffold frame attachment part 1a to which the attachment part 3A on the tip side of the scaffold frame 3 is attached and to which the second attachment part 3b abuts is configured to be separable from other parts. There is.

14 is a curing net, 15 is a construction pipe that connects the upper and lower scaffolding frames 3, and 16 is a cloth pipe that connects the left and right construction pipes 15.

According to the above configuration, once the balcony B has developed a predetermined strength, the first
By releasing the fixed connection of the mounting part 3a to the main puller 2b and setting the jack 9 on the third pipe _P3 and bringing it into contact with the weir plate 1, it can be supported on the balcony B. A can be dismantled and removed.

In addition, when assembling scaffolding C to formwork A, formwork A may be assembled at the balcony production location and scaffolding C may be assembled to this assembled formwork A. For example, formwork A may be assembled to formwork A. When assembling on the ground, etc., and transporting this assembled formwork A to the balcony construction site and setting it, as with formwork A, assemble scaffolding C to formwork A on the ground, etc., and integrate it with scaffolding C. For work purposes, it is desirable to transport and set up the balcony in this condition. In this case, until the scaffolding frame 3 is set at the location where the balcony will be constructed, the tip side attachment portion 3A
It is attached to the formwork A by attachment to the weir plate 1 and fixed connection of the first attachment part 3a to the main puller 2b, and after setting, the support part 3 is attached to the pipe support 5.
This makes them support D.

Furthermore, in the above embodiment, since the scaffolding frame 3 is attached to the balcony B using the insert 12 at the drainer 6, the insert 12 remains on the balcony B even if the scaffolding frame 3 is removed. Therefore, by screwing a cap onto the insert 12, when renovating or painting later, the insert 12 can be used to attach the scaffold frame 3.
can be installed, and construction of work scaffolding for renovation and painting can be easily done.

[Brief explanation of the drawing]

The drawings show an embodiment of the scaffolding frame for a cantilevered concrete structure according to the present invention, and FIG. 1 is a side view, and FIG.
The figure is an enlarged plan view of the main part, FIG. 3 is an enlarged side view of the main part, and FIG. 4 is an enlarged front view of the main part. A...Formwork, B...Concrete structure, 3
A, 3B... Attachment part, 1... Shelter plate, 6... Bolt, 5... Support column, 3D... Support part, 2... Shoring, 3a... First attachment part, 3b... Second attachment Department.

Claims (1)

[Claims for Utility Model Registration] 1. Two attachment parts 3A and 3 that can be selectively attached to the formwork A for producing a cantilevered concrete structure and the produced cantilevered concrete structure B.
B is a scaffolding frame for a cantilever concrete structure that is provided at appropriate intervals in the protruding direction of the cantilever concrete structure B, and the mounting portion 3
As a fixture for attaching the attachment part 3A located on the tip side of the cantilever concrete structure B among A and 3B to the formwork A, it penetrates the weir plate 1 of the formwork A in the thickness direction, and A bolt 6 is provided which is embedded and fixed in the concrete structure B prepared at one end, and a support part 3D is supported via a support 5 on a lower formwork mounting part on which the formwork A is placed. It is connected to the distal end mounting portion 3A in a state where it is located directly under or almost directly below the distal end mounting portion 3A when viewed in the width direction orthogonal to the protrusion direction, and supports the distal end mounting portion 3A. Scaffolding frame for cantilevered concrete structures. 2 The attachment part 3B located on the base end side of the concrete structure B has a first attachment part 3a that can be fixedly connected to the shoring 2 of the formwork A, and a first attachment part 3a that can come into contact with the weir plate 1 from below. 2 mounting part 3b
A scaffolding frame for a cantilevered concrete structure according to claim 1 of the utility model registration claim, which comprises: