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JP-7856271-B1 - Handrail support connection structure

JP7856271B1JP 7856271 B1JP7856271 B1JP 7856271B1JP-7856271-B1

Abstract

【assignment】 To provide a connection structure for wooden handrail posts that is easy to install, has no restrictions on the installation location, and is robust. [Solution] The handrail post 2 has a housing section 21 which includes a flange housing hole 213 drilled into the bottom surface of the handrail post 2, a through-shaft hole 212 drilled vertically upward from inside the flange housing hole 213, and a fastening hole 211 drilled from the front so as to communicate with the through-shaft hole. The fastener 3 is composed of a flanged bolt 31, a nut 32, and a washer 33. The flanged bolt 31 has a shaft portion 311 and a flange portion 312, and the bottom surface of the flange portion 312 abuts against the floor 1 and is fixed to the floor 1. When the handrail post 2 is fixed on the upper surface of the floor 1, the fastener 3 does not penetrate into the interior of the floor 1, and its entirety is stored inside the housing section 21. [Selection Diagram] Figure 1

Inventors

  • 定松 聡

Assignees

  • 株式会社アールシーコア

Dates

Publication Date
20260511
Application Date
20250331

Claims (6)

  1. A connection structure for fixing a handrail support post onto the upper surface of the floor using fasteners fixed to the floor, The aforementioned fastener comprises a flanged bolt and a nut. The flanged bolt has a shaft portion and a flange portion, and the bottom surface of the flange portion abuts against the floor and is fixed to the floor. The aforementioned handrail support post is A flange housing hole is provided in the bottom surface of the handrail support post to accommodate the flange portion of the flanged bolt, A through-hole is drilled from the inside of the flange housing hole toward vertically upward, and accommodates a part of the shaft portion of the flanged bolt, A fastening hole is drilled from the side of the handrail support so as to communicate with the through-hole, and accommodates the upper end of the shaft portion of the flanged bolt and the nut, A handrail support post connection structure characterized by having a housing section equipped with the following.
  2. The handrail support connection structure according to claim 1, characterized in that, when the handrail support is fixed to the upper surface of the floor, the fixing device does not penetrate into the interior of the floor, but is entirely housed within the housing.
  3. The handrail support connection structure according to claim 1, characterized in that the fastener comprises a washer provided between the opening at the upper end of the through-shaft hole and the nut.
  4. The fastening holes are circular in front view and drilled parallel to the floor surface. The handrail support connection structure of the 3rd, characterized in that the washer is column-shaped with a substantially crescent-shaped base that fits with the outer circumference of the circle.
  5. The handrail support connection structure of 4, characterized in that the length of the washer in the depth direction when the handrail support is fixed is approximately the same as or slightly longer than the length in the left-right direction.
  6. The handrail support post connection structure according to any one of claims 1 to 5, characterized in that the flange portion of the flanged bolt has a circular shape in plan view.

Description

This invention relates to a connection structure for fixing handrail posts to the floor of a handrail installed indoors. When a handrail is located adjacent to an open atrium in a room, and its end cannot be fixed to the wall, the end must be supported independently by the handrail post alone. For handrail posts in such positions, a method is employed in which a mortise is made at the lower end, a mortise hole is drilled in the floor beam, the mortise is inserted, and a dowel is passed through the mortise and hole from the side of the floor beam to secure it (Non-Patent Documents 1 and 2). While this method provides a beautiful finish and strong fixation, it requires advanced skills in joint processing. Furthermore, if the handrail post is erected at a joint with another beam, the joint processing becomes even more difficult. As a method for fixing handrail posts to the floor without requiring joint processing to the floor beams, for example, a method is known in which a column support is fixed to the upper surface of the flooring material with wood screws, a recess is made in the bottom surface of the leg of the handrail post that fits the shape of the column support, the column support is inserted into the recess, and fixing screws are screwed into the column support from the side of the handrail post to secure it. (Patent Document 1) Japanese Patent Publication No. 2003-27690 PANASONIC (R) System Handrail Installation Instructions (https://www2.panasonic.biz/ideacontout/2012/02/15/2012021500092745.PDF)LIXIL Main Post, Sub-Post, and Handrail Type D Installation Instructions (Published on LIXIL Business Information website: https://www.biz-lixil.com/. Instructions number: MAK-624D.) Figure 1 shows (A) a front view and (B) a cross-sectional view taken along line A-A, illustrating an embodiment of the present invention in which a handrail support post is fixed to the floor.Figure 2 shows (A) a front view of a nut, a crescent washer, and a flanged bolt forming a fastener according to an embodiment of the present invention, (B) a plan view of the crescent washer, and (C) a plan view of the flanged bolt.Figure 3 shows (A) a front view, (B) a bottom view, and (C) a cross-sectional view along A-A of a handrail support post according to an embodiment of the present invention.Figure 4 is a perspective view showing the procedure for fixing a handrail support post to the floor according to an embodiment of the present invention, where (A) is the step of fixing a flanged bolt to the floor, (B) is the step of attaching the handrail support post to the flanged bolt, and (C) is the step of fastening the handrail support post and the flanged bolt with a nut. The structure of a handrail support post according to an embodiment of the present invention will be described below with reference to the drawings. First, the basic configuration of the connection portion between the handrail support post and the floor according to this embodiment will be explained using Figure 1. As shown in Figure 1(A), the handrail post 2 is erected on the upper surface of the floor 1. The handrail post 2 is made of wood and, as shown in Figure 1(B), has an internal housing section 21. The housing section 21 is composed of a fastening hole 211, a through-shaft hole 212, and a flange housing hole 213 from top to bottom. The fastening hole 211 is drilled in the front of the handrail post 2, as shown in Figure 1(A), and is covered with a wooden plug 22. The material of the wooden plug 22 does not necessarily have to be wood; it can be any material that aesthetically harmonizes with the surface of the handrail post 2. As shown in Figure 1(B), with the handrail support 2 fixed to the floor 1, the entire fastening device 3 is stored inside the housing 21. Next, the configuration of the fastener 3 according to this embodiment will be explained using Figures 1 and 2. As shown in the figures, the fastener 3 is composed of a flanged bolt 31, a nut 32, and a washer 33. As described above, the fastener 3 is stored inside the housing 21 when the handrail support 2 is fixed to the floor 1. As shown in Figure 2(A), the flanged bolt 31 has a disc-shaped flange portion 312 and an elongated cylindrical shaft portion 311. The lower end of the shaft portion 311 is welded to the center of the flange portion 312, and a screw thread is formed on part or all of the upper end of the side surface of the shaft portion 311 so that it can be screwed into the nut 32. As shown in Figure 2(C), the flange portion 312 has a circular shape in plan view, and multiple screw holes 314 are carved out surrounding the shaft portion 311. As shown in Figure 1(A), the flanged bolt 31 is fixed to the floor 1 by wood screws (not shown) screwed into the screw holes 314 when the handrail support 2 is fixed. The washer 33 in this embodiment is a "half-moon washer," which is a columnar shape with a roughly crescent shape in front view, as shown in Figure 2(A), and is roughly square in plan view,