JPH0417709Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is applicable, for example, to the installation of embedded metal fittings for handrail supports used to attach handrails to the tips of cantilevered slabs that serve as balconies and corridors in apartment complexes. It is related to the device.

[Conventional technology]

A method of constructing a handrail using handrail support embedded metal fittings is to use a cantilever slab formwork with a handrail support embedded metal fitting consisting of a steel plate with a styrene block attached to the top surface and anchor reinforcing bars welded to the back side of the steel plate. After installing the steel plate at a predetermined position in the cantilever slab and pouring concrete for the cantilever slab, the styrene block is removed to form a recess in the concrete surface of the cantilever slab, and the steel plate is exposed within this recess, and then, A known method is to weld a handrail support mounting piece to the upper surface of this steel plate, attach the handrail support to this, and fill the surrounding area with mortar.

When installing the handrail support embedded metal fittings in a predetermined position within the cantilever slab formwork, there are methods of binding and fixing the handrail support embedded metal fittings to reinforcing bars of the cantilever slab, and methods of fixing the handrail support embedded metal fittings to the reinforcing steel bars of the cantilever slab. A vertical shaft is welded to the back surface of the cantilever slab, while a plastic receiver is nailed to the bottom formwork for the cantilever slab at a predetermined position marked out in advance, and the lower end of the shaft is welded to the bottom of the cantilever slab. The method used was to fix the handrail support embedded hardware in a fixed position by inserting it into a hole in the receiver.

[Problem that the invention attempts to solve]

In all of the above conventional examples, it is difficult to accurately and reliably install the handrail support embedded metal fittings in a fixed position, and there is a problem in that it is difficult to ensure the handrail installation accuracy (passing accuracy, level accuracy). .

In addition, concrete slag got between the styrene block and the steel plate, and the concrete adhering to the top of the steel plate had to be removed before welding the handrail support mounting piece to the steel plate exposed in the recess.

An object of the present invention is to provide an installation device for a handrail post embedded metal fitting that can eliminate these conventional drawbacks.

[Means for solving problems]

The technical measures taken by the present invention to achieve the above objectives are as follows. That is, the feature of the present invention is that a locking part is formed inside the cylinder body and on the bottom plate of the embedded metal for handrail support consisting of a cylinder body and a bottom plate fixed to the lower part of the cylinder body. A cap that can be fitted into and removed from an upper end opening, a shaft that passes through the cap vertically and has an engaging part that can be freely engaged and detached from the locking part at the lower end, and a shaft that is suspended and supported. The present invention has a structure in which a fixture is provided, and the fixture is detachably fixed to the upper end of the rising formwork at the tip of the cantilevered slab using a fastener.

[Effect]

According to the above configuration, since the fixture is attached to the upper end of the rising formwork at the tip of the cantilevered slab, there is no interference from reinforcing reinforcing bars buried in the cantilevered slab, and when marking is done on the top surface of the bottom formwork. It is easier to determine and confirm the mounting position.

Once the embedded hardware for the handrail support is fixed in place, concrete for the cantilever slab is poured. After the concrete has hardened, the fixation of the fixture to the upper end of the rising formwork of the cantilever slab is released, and the locking part formed on the bottom plate and the locking part formed on the lower end of the shaft are removed. After disengaging from the joint, the cap, shaft, and fixtures are removed and used for other purposes.

The lower end of the handrail support is inserted into the cylindrical body of the handrail support embedded metal fitting buried in concrete and fixed by welding or the like, and the surrounding gap is filled with resin mortar or the like.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an installation device for handrail support embedded metal fittings according to the present invention. In the figure, reference numeral 1 denotes a handrail support embedded metal fitting consisting of a cylindrical body 2 with a circular cross section and a bottom plate 3 fixed to its lower part by welding. Also large,
The outwardly projecting portion of the cylindrical body 2 is configured to function as a retainer. A locking portion 4 is formed on the upper surface of the central portion of the bottom plate 3 by welding a nut. Reference numeral 5 denotes a synthetic resin cap that can be fitted into and removed from the upper opening of the cylinder 2, and has a small diameter portion that fits into the cylinder 2 and a large diameter portion that is larger than the outer diameter of the cylinder 2. 6 is a metal donut-shaped spacer, and 7 is a metal shaft that vertically passes through the center of these 5 and 6. A male threaded portion is provided at the lower end of the shaft body 7, and the male threaded portion forms an engaging portion 8 that removably engages with the locking portion 4. 9
is a metal fixture that suspends and supports the shaft body 7, and has a bolt hole 10 at one end, and a fastener 11 such as a butterfly bolt inserted into this allows the tip of the cantilever slab to rise. It is configured to be detachably fixed to the upper end of the formwork 12. The illustrated shaft body 7 is rotatable with respect to the cap 5, spacer 6, and fixture 9, and has a metal ring 13 attached to its upper end through which a steel rod or other rotating operation tool can be inserted, and an intermediate A stopper 14 for preventing the cap 5 from coming off is attached to the portion.

The mounting device described above is used in the following manner.

First, as shown in FIGS. 2 and 3, the cap 5 is fitted into the upper opening of the cylindrical body 2, and the shaft 7 is rotated so that the engaging part 8 at the lower end is placed on the bottom plate 3. Screw it into the locking part 4 and engage it.

In this state, one end of the fixture 9 is attached to the tip of the cantilever slab by the fastener 11.
Fix it to the upper end of 2. Thereby, the embedded metal fitting 1 for handrail support is firmly fixed in a predetermined position.

After that, a cantilevered slab of concrete 15 is placed, and when the concrete 15 hardens and develops a predetermined strength, the shaft body 7 is turned to release the engagement between the engaging part 8 and the locking part 4, and the fastener is removed. 11... and remove the cap 5 from the upper opening of the cylindrical body 2. In this case, since the cap 5 is made of synthetic resin, there is no adhesion of concrete and the cap 5 can be easily removed.

In this state, as shown in Figure 4, the handrail support 1
6 into the cylinder body 2. In this case, the locking part 4 made of a nut is located at the center of the bottom plate 3, and since the handrail post 16 is pipe-shaped, the locking part 4
enters the hollow part of the handrail post 16, and the handrail post 1
6 will not become an obstacle.

Thereafter, the handrail support 16 and the opening edge of the cylindrical body 2 are fixed by spot welding 17. in this case,
As shown in the figure, by forming the cap 5 into a stepped shape consisting of a small diameter portion that fits into the inside of the cylinder 2 and a large diameter portion larger than the outer diameter of the cylinder 2, An annular space is formed around the upper edge, and the spot welding 17 described above can be easily performed.

Next, a resin mortar 18 is filled in the gap around the handrail post 16, and a coating 19 is applied on top of the resin mortar 18.
It forms the handrail. 20 in FIG. 2 is a bottom form made of plywood, and 21 is a groove form made of steel.

Incidentally, the cap 5 and the spacer 6 may be formed integrally. Although not shown, the other end of the fixture 9 may be extended, and this extended portion may be supported by the groove formwork 21. In the above embodiment, the shaft body 7 is configured to be rotatable with respect to the fixture 9, but after integrating the two and removing the fasteners 11, the shaft body 7 is rotated by holding the fixture 9. It is also possible to configure and implement it as follows. Further, in the above embodiment, the locking portion 4 was configured by a nut welded to the bottom plate 3, and the engaging portion 8 was configured by a male threaded portion provided at the lower end of the shaft body 7. Conversely, a short screw shaft is provided upright on the upper surface of the center part of the bottom plate 3 to form the locking part 4, and a downwardly opening screw hole is formed in the lower end of the shaft body 7 to form the engaging part 8. It is also possible to do so.

FIG. 5 shows another embodiment of the invention. In this embodiment, the horizontal axis of the dimension is fixed to the lower end of the shaft 7, in other words, the lower end of the shaft 7 is formed in an inverted T shape to constitute the engaging portion 8, and the bottom plate 3 is The upper surface is bent into a substantially inverted L shape that engages with the engaging portion 8 by rotating the shaft body 7 in one direction around its axis and releases the engagement by rotating in the opposite direction. The locking portion 4 is characterized in that the locking portion 4 is constructed by welding a pair of protrusions. In this case, at least one of the surfaces of the locking part 4 and the engaging part 8 is formed into an inclined surface, and as the shaft body 7 is rotated in a direction in which the engagement between both 4 and 8 becomes deeper, the bottom plate 3 becomes closer to the cap. It may be configured so that it is pulled toward the 5th side. In this way, rattling can be reliably prevented.

In each of the above embodiments, the tip rising form 12 of the cantilever slab is made of steel, and screw holes are formed in advance at predetermined positions on the top surface, but the tip rising form 12 is made of plywood. It may be hot. In this case, nails or screws are suitable as the fasteners 11.

[Effect of idea]

According to the present invention, since the embedded hardware for the handrail support is attached to the upper end of the rising side frame of the cantilever slab using the above-mentioned mounting device, there is no interference from reinforcing reinforcing bars embedded in the cantilever slab, and there is no interference with the bottom of the cantilever slab. Determining the installation position, compared to marking on the top surface of the formwork.
Easy to confirm.

Therefore, the installation accuracy (passing accuracy, leveling accuracy) of the handrail can be improved.

In addition, since the handrail support embedded hardware is composed of a cylinder and a bottom plate, and a cap is fitted into the upper opening of the cylinder, concrete does not flow in and there is no need to clean the inner surface of the cylinder after the concrete hardens.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Fig. 1 is a partially cutaway perspective view, Fig. 2 is a longitudinal side view in use, Fig. 3 is a plan view in use, and Fig. 4 is a schematic longitudinal side view showing the handrail post attached. . FIG. 5 is a partially cutaway perspective view showing another embodiment of the present invention. 1...Embedded hardware for handrail support, 2...Cylinder, 3
... Bottom plate, 4 ... Locking part, 5 ... Cap, 7 ...
...Shaft body, 8...Engagement part, 9...Mounting tool, 11...
... Fastener, 12... Tip rising formwork.

Claims (1)

[Scope of utility model registration request] A locking part is formed inside the cylinder body and on the bottom plate of the embedded metal for handrail support consisting of a cylinder body and a bottom plate fixed to the bottom of the cylinder body, and the locking part is fitted into and released from the upper end opening of the cylinder body. A freely movable cap, a shaft body that passes through the cap vertically and has an engaging part that can be freely engaged and detached with the locking part at the lower end, and a fixture that suspends and supports the shaft body are provided, and the shaft body is installed. 1. A device for attaching a handrail support embedded metal fitting, characterized in that the fitting is configured to be detachably fixed to the upper end of a rising formwork at the tip of a cantilevered slab using a fastener.