JPH02186055A - Execution method for basic pillar - Google Patents

Abstract

PURPOSE:To firmly install a basic pillar in simple ways by installing the projection part formed in the lower part of the basic pillar onto an installation metal fitting installed onto a floor surface through a hole on a stepping board. CONSTITUTION:The wood screw part 20 of a tightening metal fitting 11 is screwingly fixed at the lower edge part of the projection part 5 of a basic pillar 1. Then, the projection part 5 of the basic pillar 1 is inserted through a hole 2 on a stepping board 7, and the bolt 21 of the tightening metal fitting 11 is screwingly fixed onto the cylindrical nut 9 of an installation metal fitting 3 installed onto a floor surface 8.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a parapet main pillar attached to a staircase in a building.
More specifically, the present invention relates to a method of constructing a main pillar when the main pillar is installed in a tread section.

(Prior art) Conventionally, the method of constructing main pillars in the construction of stairs for houses finished with wood is to attach a connecting bolt with wood screws formed at both ends to the lower end of the main pillar, and then screw it into place by screwing it into place. 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 part of the floor, as this allows for more floor space and creates a calm atmosphere without creating a feeling of pressure on residents. This is preferable from this point of view, and in particular, in the case of high-class staircases that place emphasis on design with emphasis on 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 a strong installation using conventional construction methods.

(Problem to be Solved by the Invention) Therefore, the inventors of the present invention provided a hole in the footboard portion for inserting the lower part of the main pillar, and fixed a metal fitting with a cylindrical nut on the floor directly below the hole. However, we have found that by attaching the lower end of the main pillar to the cylindrical nut of the metal fitting through the hole, it is possible to attach the main pillar that can withstand long-term use very easily. The invention has been achieved.

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 aspects of the present invention are such that a main post forming a convex portion at the lower part is inserted through a hole drilled into the tread, and the lower end of the convex portion of the main post is inserted into the step plate. A method for constructing a main post, characterized in that the installation consists of a cylindrical nut fixed to the floor directly below the hole and a fixing plate, and the main post is installed on the step plate by fixing it to the metal fitting via a fastener. achieved by.

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) is 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. In addition, the convex part (
5) The length can be easily cut and adjusted on site to match the height of the stair steps.

Reference numeral (2) is a hole drilled in the stair tread (7).

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) is a mounting metal fitting consisting of a cylindrical nut (9) and a fixing plate (1o) fixed to the floor surface (8) directly below the hole (2). For installation, the metal fittings (3) can be easily fixed to the floor using known means such as tapping screws.

The code (11) is the convex part (5) of the main pillar and the mounting bracket (3).
) is a fastener for connecting and fixing (see Figure 3)
. The fastener (11) used in the present invention has a wood screw part (20) at the top and a bolt part (21) at the bottom.

To fix the convex part (5) of the main pillar to the mounting bracket (3), screw the wood screw part (2o) of the fastener (11) into the lower end of the convex part (5), then fix the bolt part ( 21) is installed by screwing and fixing it onto the cylindrical pad (9) of the metal fitting (3).

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 main post and handrail are attached at a position that is offset from the longitudinal center line of the handrail, all the horizontal force applied to the handrail is concentrated at the main post as a large rotational force at the part where the main post is attached. This will loosen the connection part of the fastener (11). 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 into a rotational force centered on the center of gravity of the fixed plate (10) (see Figure 4). ), so that the rotational force around the fastener disappears.

(Effects) According to the construction method of the main pillar of the present invention, the main pillar can be installed on the tread part, without the need for labor such as tenon processing, and the installation part will not loosen semi-permanently. In particular, it is possible to securely attach the main post to the handrail even if the handrail has a spiral shape that is offset from the longitudinal center line of the handrail.

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. Figure 4 is a plan view showing the installation in Figure 2 in detail (
a) and a cross-sectional view (b). 1...Main pillar 2...Hole 3...Mounting with metal fittings 5...Convex part of main pillar 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・... Tubular nut 10 ... Fixing plate 11 ... Fastener 20 ... Wooden part

Claims (1)

[Claims] 1) The main pillar (1) forming the convex part (5) at the lower part is connected to the tread plate (
7) through the hole (2) drilled in the main post (1).
The lower end of the convex part (5) is connected to the floor surface (8) directly below the hole (2).
) is characterized in that the main post is installed on the tread portion by being fixed via a fastening fitting (11) to a mounting fitting (3) consisting of a cylindrical nut (9) and a fixing plate (10) fixed to the tread plate. Construction method of main pillar. 2) A construction method for a main post used for a spiral handrail in which the mounting 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 to the fixing plate (10).
The method for constructing a main pillar according to claim 1, characterized in that the mounting bracket (3) is installed at a position away from the center of gravity of the main pillar.