JPS6244017Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a support for a handrail anchor for a building, which is used when attaching a handrail to the rising end of a building, for example, a balcony.

Conventionally, a device described in Japanese Utility Model Application Publication No. 54-16127 has been devised for use when attaching a handrail support to a balcony or the like.

However, this not only requires a lot of time and effort to remove the Styrofoam block from the hardened concrete after concrete is poured, but it also causes deformation and damage, making it difficult to remove the Styrofoam block from the hardened concrete. must be replaced. It is practically inconvenient and uneconomical.

In addition, compared to the above, there is an improvement in the removal method from within the concrete.
The one described in Publication No. 26347 is a hexagonal bolt D that passes through the support plate A and the recess forming member B and is attached to the upper plate of the concrete anchor C, as shown in Fig. 6.
At the same time, the head _d1 of the hexagonal bolt D is brought into contact with the upper surface of the recess forming member B, and a washer for preventing upward removal from the lower end recess of the recess forming member B is placed near the lower end of the recess forming member B. _d2 is welded and fixed, and the hexagonal bolt D is connected so that it does not move up or down at all.

However, with this method, when removing concrete after pouring, it is necessary to first untie the support plate A nailed to the upper crosspiece of the formwork P as shown in the figure, so the support plate A must be removed using a crowbar or the like. By applying a considerable amount of force, deformation as shown by the chain line occurs each time.

Therefore, early replacement of the support plate is inevitable, which significantly reduces the efficiency of disassembly work, which is unreasonable and uneconomical in practice.

In addition, the positioning of the support plate A and the recess forming member B is done by nailing, which is troublesome and has poor workability.
It has the following disadvantages.

This invention was devised in view of the conventional problems mentioned above, and its purpose is to provide a support for building handrail anchors that has a simple structure, excellent workability, and is practically and economically advantageous. There is a particular thing.

In order to achieve the above object, this invention consists of a strip-shaped mounting arm having nail holes and bolt insertion holes for nailing to the formwork on the side, a cone having a bolt insertion tube penetrating through the center, and a cone in the center of the board. By screwing the anchor bolt into the female threaded hole of the concrete anchor body through the above-mentioned mounting arm and cone,
The support is removably connected, and an engagement groove is provided in one side direction of the center part of the upper surface of the cone to fit and engage with the plate width of the mounting arm, and an upper part of the male threaded shaft at the lower part of the eye bolt is provided. The present invention is characterized in that a retaining plate is provided to engage with the lower end of the bolt insertion tube of the cone with a certain gap therebetween.

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

Figure 1 is a partially cut away perspective view, Figure 2 is the 1st
It is a longitudinal cross-sectional view of a part of the figure.

In the figure, 1 is a strip-shaped mounting arm with several nail holes 2 near both ends and a bolt insertion hole 3 in the center, and 4 is formed into a tapered shape with a small diameter from the top to the bottom. It is a rectangular cone made of synthetic resin or the like, and is integrally provided with a bolt insertion tube 5 that penetrates inside the center, and is fitted and locked to the plate width of the mounting arm 1 in one side direction at the center of the upper surface. An engagement groove 6 is provided, and the lower surface is opened near the center.

The lower end of the bolt insertion tube 5 is recessed inward from the lower surface of the cone 4 by a certain distance H.

Reference numeral 7 designates a concrete anchor body in which anchor pieces 8 and 8 are disposed to protrude downward from both left and right sides of a rectangular base plate 9, and a female threaded portion 1 is provided at the center of the base plate 9.
0 is set.

Reference numeral 11 indicates that the shaft rod portion 12 is inserted into the bolt insertion hole 3 of the support arm 1.
An eye bolt that passes through the bolt insertion cylinder 5 of the cone 4 and screws the male threaded shaft 13 at the lower end into the female threaded hole 10 of the concrete anchor body 7. A retaining plate 14 is screwed into the upper part of the male threaded shaft 13, and the Installed at the end of the male thread.

In the support device having the above structure, the support arm 1 is fitted along the engagement groove 6 on the upper surface of the cone 4, the eye bolt 11 is passed through the support arm 1 and the cone 4, and a retaining plate is attached to the male threaded shaft 13 of the eye bolt 11. 14 and assemble to prevent this eye bolt 11 from slipping out vertically.

In this state, the concrete anchor body 7 is coupled to the male threaded shaft 13 of the eye bolt 11 protruding from the lower surface of the cone 4 through the female threaded hole 10 of the base plate.

Further, as shown in FIG. 3, the support plate 1 is passed between the formworks P, P, and both ends thereof are nailed to the upper crosspiece, and the supporting plate 1 is installed at a predetermined position within the formworks P, P.

Next, concrete is placed in the formwork, and after curing, first loosen the eye bolts 11 and separate them from the concrete anchor body 7, as shown in FIG. It is possible to move freely up and down within a certain range, and to release the nails from the formworks P and P.

Subsequently, the cone 4 can be removed from the concrete by pulling upward using the annular head portion 11a of the eyebolt 11.

Furthermore, as shown in FIG.
Based on this idea, it can be easily devised to form a groove between which the support arm 1 is fitted and locked.

In addition, a retaining plate 1 provided at the lower end of the eye bolt 11
4 may be fixed after being screwed onto the male threaded shaft 13 of the eye bolt 11, but if it is only screwed onto the male threaded shaft 13, it may be replaced if the supporting arm 1 or the cone 4 is damaged. You can easily and easily operate it by unscrewing the retaining plate whenever you want.

Furthermore, the shape and structure of the anchor piece of the concrete anchor body 7 can be arbitrarily designed.

Additionally, any rib may be selected for the support arm 1 in order to enhance the overall reinforcing effect.

According to the supporting device for a handrail anchor for buildings of this invention as described above, the engagement groove facilitates the connection between the support arm and the cone provided thereunder, and the cone can be positioned reliably.

In addition, during demolition work after concrete pouring, by unscrewing the eye bolt a certain amount in advance and separating it from the concrete anchor body, the support arm can be moved up and down within a certain range. It can be easily and easily unraveled from the formwork, further improving work efficiency.

At the same time, deformation of the support arm can be reduced, which is advantageous for reuse, and is practical, rational, economical, and highly effective.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the supporting device for a handrail anchor for buildings according to this invention, Fig. 2 is a partial central vertical sectional view of Fig. 1, and Fig. 3 shows the above in use. A front view, FIG. 4 is a cross-sectional view of the main part of the cone in use, FIG. 5 is a perspective view of another embodiment of the cone according to this invention, and FIG. 6 is a partially cutaway view of the conventional example in use. It is a diagram. DESCRIPTION OF SYMBOLS 1... Support arm, 4... Cone, 5... Bolt insertion tube, 6... Engagement groove, 7... Concrete anchor body, 8... Anchor piece, 9... Board, 11...
Eye bolt, 14... retaining plate, P... formwork.

Claims (1)

[Scope of utility model registration request] A strip-shaped mounting arm with nail holes and bolt insertion holes for nailing to the formwork on the side, a cone with a bolt insertion tube penetrating through the center, and a concrete anchor body with a female threaded hole in the center of the board. is a support that is removably connected by screwing an eye bolt into a female screw hole of the concrete anchor body through the above-mentioned mounting arm and cone, and in the direction of one side of the central part of the upper surface of the cone, the mounting arm An engagement groove for fitting and locking is provided for the width of the plate, and a retaining plate is provided at the top of the male threaded shaft at the bottom of the eyebolt to ensure a certain gap and engagement with the lower end of the bolt insertion tube of the cone. A support for a handrail anchor for a building, characterized in that it is provided with: