JPH0338351Y2 - - Google Patents

Description

[Detailed explanation of the invention] a. Industrial application field This invention relates to the installation structure of handrails.
This invention relates to a handrail installation structure in which a main body anchor is fixed on a foundation made of lightweight concrete, and a cap and handrail are installed on the main body anchor.

b. Prior art and its problems Conventionally, there has been a handrail installation structure in which a main body anchor is fixed on a foundation made of lightweight concrete, and a cap and handrail are installed on the main body anchor.

In this conventional handrail installation structure, it was common to fix the main body anchor to anchor bolts buried in the foundation. If the handrail is made of a brittle material, it has poor durability against vibrations, etc., so there has been a desire for a handrail installation structure that further improves this point.

This invention was made in view of the above circumstances.
The purpose is to provide a handrail installation structure with improved durability.

c Means for solving the problem In order to achieve the above purpose, in this invention, the main body anchor is fixed on a foundation made of lightweight concrete, and a handrail is installed by installing a cap and a handrail on the main body anchor. The structure includes a pair of arms having a substantially L-shaped cross section, a base that rotatably supports one end of both arms and is fixed to the base, and a base that projects downward into the main body anchor. It consists of a convex part and a lowering means for forcibly moving the convex part downward relative to the base, so that when the convex part is moved down, the convex part touches the shoulders of both arms. By pushing down, the other end portions of both arms squeeze both side surfaces of the base, reinforcing the fixation of the main body anchor to the base.

d. Examples Hereinafter, examples of the handrail installation structure according to the present invention will be described in detail with reference to the attached drawings.

1 to 4 show an embodiment of the present invention.

The handrail installation structure according to this embodiment includes a pair of arms 1, 1 having a substantially L-shaped cross section, and a base 2 that supports the arms.
and a lowering means 4 for lowering the main body anchor 3.

One ends 1a, 1a of the arms 1, 1 are curved, and both ends 2a, 2a of the base 2 are formed into a substantially cylindrical shape.

The arms 1, 1 have their one ends 1a, 1a fitted to both ends 2a, 2a of the base 2, respectively, and are thereby rotatably supported by the base 2 about both ends.

A large screw insertion hole 2 is located in the center of this base 2.
b is formed, and a pair of female threaded holes 2c, 2c are formed at the base with the insertion hole 2b in between.

The base 2 with the arms 1, 1 is placed on a foundation 5 made of lightweight concrete, for example ALC.

On the upper surface of the base 5, female screw holes 6a are formed at predetermined intervals so as to face the upper part outward.

The female threaded hole 6a can be formed, for example, by embedding a cylindrical member 6 whose inner peripheral surface is threaded in the upper part of the base 5.

Also, on the top surface of the base 5, there is a female screw hole 2 of the base 2.
A pair of recesses 7, 7 are formed with the female threaded hole 6a in between.

Here, installation of the base 2 on the foundation 5 will be explained.

First, the base 2 to which the arms 1 and 1 are attached is placed at a predetermined position on the upper surface of the base 5, and then the large screw 8 is screwed into the female screw hole 6a of the base 5 through the insertion hole 2b of the base 2. Set up together.

Thereafter, the base 2 is tightened and fixed from the upper surface with the nut 9.

In this way, the base 2 fixed on the base 5
A main body anchor 3 is further installed on top of the main body anchor 3.

The main body anchor 3 has a substantially inverted U-shaped cross section, and has downwardly protruding convex portions 10 on both sides thereof.
10 are formed.

The center portion of the main body anchor 3 is bent to protrude downward, and the center portion in the longitudinal direction (perpendicular to the drawing) has a nut 9 large enough to insert the nut 9 required for fixing the base portion 2. Sano nut insertion hole 3
A is bored, and a pair of screw insertion holes 3b, 3b are formed sandwiching the insertion hole 3a.

The screw insertion holes 3b, 3b of the main body anchor 3 have a diameter sufficient to allow the threaded portion 11c of the screw 11, which has a hexagonal recess 11b into which a hexagonal wrench is inserted into the head 11a, to be inserted, and to prevent the head 11a from being inserted. It's getting bigger.

Next, we will explain the installation of the main body anchor 3,
The operation of this embodiment will also be mentioned.

First, insert the base 5 into the insertion hole 3a of the main body anchor 3.
The main body anchor is placed on the base 2 by passing through the large screw 8 erected above.

After that, attach screws 11 and 11 to main body anchor 3.
The insertion holes 3b and 3b are screwed together, respectively.

As the screws 11, 11 are screwed together, the main body anchor 3 is forcibly moved downward relative to the base 2, and the protrusions 10, 10 in the main body anchor are attached to the shoulders near the bends of the arms 1, 1. Push down parts 1b, 1b (see Figure 4).

When the shoulders 1b, 1b of the arms 1, 1 are pushed down, the contact parts 1c, 1c formed by bending the other ends of the arms 1, 1 into a substantially crank shape sandwich both side surfaces of the base 5. Press.

By holding the base 5 of both arms 1, 1, the base 2
The large screw 8 is more strongly held on the base 5 via the base 2, and the main body anchor 3 is also more strongly fixed on the base 5 via the base 2.

Thereafter, as in the past, a cap (not shown) is installed on the main body anchor 3, and the legs of the handrail (not shown) are fixed to the large screw 8, completing the installation of the handrail.

Regarding the installation of this cap and handrail legs,
Since this can be easily carried out using well-known techniques, detailed explanation thereof will be omitted.

FIG. 5 shows another embodiment of the handrail installation structure according to the present invention.

In the handrail installation structure according to this embodiment, both arms 1
2 and 12 are integrally formed and fixed to the base 13, and the shoulders 12a, 12a of both arms are made vertically movable due to the elasticity of the arms 11, 11 themselves. This provides the same effect as being rotatably supported on the base 13.

In FIG. 5, components having the same functions as those in the embodiment described above are designated by the same reference numerals, and explanations of their functions will be omitted.

e. Effects of the invention As explained above, according to the handrail installation structure according to the present invention, since both arms supported on the base are used to hold the base, it is possible to fix the legs of the handrail. It is possible to further strengthen the fixation of the large screw to the base, and the elasticity of both arms makes it resistant to vibration.

[Brief explanation of drawings]

1 to 4 show essential parts of an embodiment of the handrail installation structure according to the present invention, FIGS. 1 and 2 are longitudinal cross-sectional views thereof, and FIG. 3 is a cross-sectional view thereof. FIG. 4 is a longitudinal sectional view thereof, and FIG. 5 is a longitudinal sectional view showing the main part of another embodiment of the handrail installation structure according to the present invention. 1, 12... Arm, 2, 13... Base, 3... Main body anchor, 4... Lowering means, 5... Foundation, 6...
...Female screw, 8...Large screw, 9...Natsuto,
10...Protrusion, 11...Screw.

Claims (1)

[Claims for Utility Model Registration] (1) In a handrail installation structure in which a main body anchor is fixed on a foundation made of lightweight concrete, and a cap and a handrail are installed on the main body anchor,
A pair of arms having a substantially L-shaped cross section, a base rotatably supporting one end of these arms and fixedly installed on the base, and a convex portion protruding downward within the main body anchor. and lowering means for forcibly moving the protrusion downward relative to the base, so that when the protrusion is moved downward, the protrusion pushes down the shoulders of the arms. Therefore, the handrail installation structure is characterized in that the other end portions of the two arms clamp both side surfaces of the base to reinforce the fixation of the main body anchor to the base. (2) The lowering means has a screw hole formed in the base, a bolt screwed into the screw hole, and a screw portion of the bolt that is inserted into the screw hole and has a size that makes it impossible to insert the head of the bolt. and an insertion hole formed in the main body anchor, and the main body anchor is moved downward by screwing the bolt into the screw hole through the insertion hole of the main body anchor. A handrail installation structure according to claim 1 of the utility model registration claim.