JPH0512497B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <<Industrial Application Field>> The present invention relates to a parapet main post attached to a staircase in a building, and more particularly to a method for constructing a main post when the main post is installed on a tread portion.

《Prior art》 Conventionally, the method of constructing main pillars when constructing stairs for houses finished with wood is to attach connecting bolts with wood screws formed at both ends to the lower end of the main pillar, and then screw this into the main post to fix it. Alternatively, there is a method of attaching it by inserting it into a building structure such as a large wooden block and using adhesive, a plug, reinforcing metal fittings, etc.

However, the construction method using connecting bolts has a strength problem. In addition, the construction method using tenon insertion requires time and effort to process the tenon into the main railing, etc., and since the load on the main pillar is supported only by the bottom of the main pillar and the tenon insertion part, the tenon insertion part gradually loosens, resulting in damage to the entire handrail. The drawback was that it rattled.

On the other hand, when it comes to installing main pillars, it is better to install them on the stair treads than on the floor, as this allows for more floor space and creates a calm atmosphere without creating a feeling of pressure on the occupants. In particular, in the case of high-class staircases that place emphasis on design and emphasize curved lines, installing the main pillar on the tread portion improves the design.

However, when attaching the main pillar to the tread, it is difficult to achieve strong installation using conventional construction methods.

<<Problems to be Solved by the Invention>> Therefore, the present inventors provided a hole for inserting the lower part of the main pillar in the treadle part, and fixed a mounting bracket having a cylindrical nut to the floor directly below the hole. discovered that by attaching the lower end of the main post to the cylindrical nut of the above-mentioned mounting fitting through the hole via a fastener, it was possible to attach a main post that could withstand long-term use very easily, and developed the present invention. Reached.

Therefore, a first object of the present invention is to provide a method for constructing a main post on a footboard portion.

A second object of the present invention is to provide a construction method for main pillars that can withstand long-term use.

A third object of the present invention is to provide a simple construction method for main pillars that does not require on-site processing such as tenon processing.

<<Means for Solving the Problems>> The above-mentioned objects of the present invention are to insert the main pillar 1 forming the convex part 5 at the lower part through the hole 2 bored in the footboard 7, and to remove the convex part of the main pillar 1. A fastener 11 is attached to the lower end of the upper part 5 to a mounting fitting 3 consisting of a cylindrical nut 9 and a fixing plate 10 fixed to the floor surface 8 directly below the hole 2.
This was achieved by a method of constructing a main pillar, which is characterized by installing the main pillar on the tread plate by fixing it through the tread plate.

Hereinafter, the present invention will be explained in detail along with its operation based on examples.

FIG. 1 is a sectional view showing an example of the construction method of the main pillar of the present invention.

In FIG. 1, reference numeral 1 denotes a main pillar that forms a convex portion 5 at its lower part. The cross-sectional shape of the convex portion 5 may be square, rectangular, circular, or the like. or,
The length of the convex portion 5 can be easily cut and adjusted on site to match the height of the steps of the stairs.

Reference numeral 2 indicates a hole drilled in the tread 7 of the stairs.
The size of the hole 2 is preferably approximately the same as the convex portion 5 of the main post so that the main post does not move easily.

Reference numeral 3 denotes a mounting fitting consisting of a cylindrical nut 9 and a fixing plate 10, which is fixed to the floor surface 8 directly below the hole 2. The mounting bracket 3 can be easily fixed to the floor using known means such as tapping screws.

Reference numeral 11 denotes a fastener for connecting and fixing the convex portion 5 of the main pillar and the mounting fitting 3 (see FIG. 3). The fastener 11 used in the present invention has a wood screw portion 20 at the top and a bolt portion 21 at the bottom.

The convex part 5 of the main post and the mounting bracket 3 are fixed to each other by screwing and fixing the wood screw part 20 of the fastener 11 to the lower end of the convex part 5, and then attaching the bolt part 21 to the mounting bracket 3.
This is done by screwing and fixing it into the cylindrical nut 9 of.

FIG. 2 is a cross-sectional view when the method of constructing a main post of the present invention is used for a spiral handrail.

In particular, in the case of a spiral handrail where the mounting position of the main post and handrail is offset from the longitudinal center line of the handrail, all the horizontal force applied to the handrail is concentrated as a large rotational force on the mounting part of the main post, and the fasteners 11 connections will be loosened. Therefore, by fixing the cylindrical nut 9 off the center of gravity of the fixed plate 10, the horizontal force applied to the handrail is changed to a rotational force centered on the center of gravity of the fixed plate 10 (see Fig. 4).
To eliminate the rotational force centered on the fastener.

<<Effects>> According to the construction method of the main pillar of the present invention, the main pillar can be installed on the tread part, and the attachment part will not loosen semi-permanently without the need for labor such as tenon processing.
In particular, even with a spiral handrail in which the mounting position of the main post and the handrail is shifted from the longitudinal center line of the handrail, firm installation is possible.

Further, the installation position of the main pillar is not limited to the position of the building structure such as the main pillar, and can be freely selected in consideration of aesthetic appearance, livability, etc.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the construction method of the main pillar of the present invention. FIG. 2 is a sectional view showing another example of the construction method of the main pillar of the present invention. FIG. 3 is a diagram showing details of the fasteners used in the construction method of the main pillar of the present invention. FIG. 4 is a plan view a and a cross-sectional view b showing details of the mounting bracket shown in FIG. 2. 1... Main pillar, 2... Hole, 3... Mounting bracket, 5
... Convex part of main pillar, 7 ... Step board, 8 ... Floor surface, 9
... Tubular nut, 10 ... Fixing plate, 11 ... Fastener, 20 ... Wood screw part, 21 ... Bolt part.

Claims (1)

[Scope of Claims] 1. A main pillar 1 having a convex portion 5 formed at its lower part is inserted through a hole 2 made in a footboard 7, and the lower end of the convex upper part 5 of the main pillar 1 is inserted directly below the hole 2. The main pillar is installed on the tread part by fixing it via a fastening metal fitting 11 to a mounting metal fitting 3 consisting of a cylindrical nut 9 and a fixing plate 10 fixed to a floor surface 8 of the main pillar. Construction method. 2. A construction method for a main post used for a spiral handrail in which the attachment position of the main post 1 and the handrail is offset from the longitudinal center line of the handrail, in which the cylindrical nut 9 is attached at a position away from the center of gravity of the fixed plate 10. 2. The method for constructing a main pillar according to claim 1, characterized in that the mounting bracket 3 is used.