Handrail support connection structure

Abstract

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.

Description

Technical Field

[0001] The present invention relates to a connection structure for fixing a handrail post of a handrail installed indoors to a floor.

Background Art

[0002] For a handrail located adjacent to an indoor atrium, when the end thereof is at a position that cannot be fixed to a wall, the end portion is made to stand on its own solely by the handrail post. For a handrail post located in such a position, for example, a tenon is provided at the lower end, a tenon hole is drilled in the floor beam to allow the tenon to be inserted and fitted, and a dowel is penetrated from the side surface of the floor beam through the tenon and the tenon hole for fixation, which is a conventionally adopted method (Non-Patent Document 1, Non-Patent Document 2). While this method provides a fine finished appearance and enables firm fixation, it requires advanced skills for joint processing, and in addition, there is a problem that the joint processing becomes even more difficult when the position where the handrail post is to be erected on the floor beam is a joint portion with another beam.

[0003] As a method for fixing a handrail post to a floor that does not require joint processing on the floor beam, for example, a method is known in which a post support is fixed to the upper surface of the floor material with wood screws or the like, an insertion portion that fits the shape of the post support is recessed in the bottom surface of the leg portion of the handrail post, the post support is penetrated into the insertion portion, and a fixing screw is screwed in from the side surface of the handrail post toward the post support for fixation. (Patent Document 1)

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Non-Patent Documents

[0005]

Non-Patent Document 1

[0006] However, in the method using the column support described above, the column support is housed in a penetration portion provided on the bottom surface of the leg of the handrail support. Therefore, the material of the column support must be a material with a moderate hardness that allows the fixing screws to penetrate (Patent Document 1 states "aluminum or other metal or fiber-reinforced plastic"), and it is considered difficult to provide sufficient strength (for example, strength that can withstand repeated leaning by a person).

[0007] Furthermore, Patent Document 1 discloses a variation of the above-mentioned method using a column support, in which the column support is made of a different metal material, fixing bolts are used instead of fixing screws, the fixing bolts are inserted through bolt holes drilled in the side surface of the handrail support, and then screwed into screw holes formed in the column support to fix it in place. However, with this method, it is difficult to align the bolt holes and screw holes, and there is a risk that the handrail support may become loose due to wood shrinkage caused by drying over time.

[0008] This invention was made in view of the above-mentioned conventional problems, and aims to provide a handrail support connection structure that has no restrictions on the installation location, is easy to install and does not require advanced skills from the installer, is durable, has a good aesthetic appearance and can be firmly fixed. [Means for solving the problem]

[0009] The handrail support post connection structure according to an embodiment of the present invention that solves the above problems is: 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 consists of a flanged bolt having a shaft portion and a flange portion, a washer, and a nut. The flanged bolt is fixed to the floor by the bottom surface of the flange contacting the floor. The aforementioned handrail support post has a housing portion comprising a flange housing hole drilled into the bottom surface of the handrail support post, a through-shaft hole drilled vertically upward from inside the flange housing hole, and a fastening hole drilled from the front so as to communicate with the through-shaft hole. In the state in which the handrail support is fixed to the upper surface of the floor, the fixing device is characterized in that it does not penetrate into the interior of the floor, and the entire device is stored inside the housing. [Effects of the Invention]

[0010] The handrail support structure of the present invention is configured as described above, using a fixing device fixed to the upper surface of the floor and a handrail support having a housing inside, wherein the fixing device is fastened inside the handrail support to secure the handrail support. By using this structure, there are no restrictions on the installation location due to the floor structure, it is possible to finish with a good aesthetic appearance, and it is possible to provide a strong and durable handrail support connection structure that does not require advanced skills from the installer. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 shows (A) a front view and (B) a cross-sectional view (AA) of an embodiment of the present invention, with the handrail support fixed to the floor. [Figure 2] 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] Figure 3 shows (A) a front view, (B) a bottom view, and (C) a cross-sectional view AA of a handrail support post according to an embodiment of the present invention. [Figure 4]Figure 4 is a perspective view showing the procedure for fixing a handrail post according to an embodiment of the present invention to a floor, wherein (A) shows the step of fixing a flanged bolt to the floor, (B) shows the step of attaching the handrail post to the flanged bolt, and (C) shows the step of fastening the handrail post and the flanged bolt with a nut. [Mode for Carrying Out the Invention]

[0012] The structure of the handrail post according to the 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 post according to the present embodiment and the floor will be described using Figure 1.

[0013] As shown in Figure 1(A), the handrail post 2 is erected on the upper surface of the floor 1. The material of this handrail post 2 is wood, and as shown in Figure 1(B), it has an accommodating portion 21 inside, and the accommodating portion 21 is composed of a fastening hole 211, a shaft through hole 212, and a flange portion accommodating hole 213 from top to bottom. As shown in Figure 1(A), the fastening hole 211 is drilled in the front face of the handrail post 2, and is covered with a wooden plug 22. The material of the wooden plug 22 does not necessarily need to be wood as long as it harmonizes with the surface of the handrail post 2 from an aesthetic point of view.

[0014] As shown in Figure 1(B), in a state where the handrail post 2 is fixed to the floor 1, the entire fixture 3 is stored inside the accommodating portion 21.

[0015] Next, the configuration of the fixture 3 according to the present embodiment will be described using Figure 1 and Figure 2. As shown in the figures, the fixture 3 is composed of a flanged bolt 31, a nut 32 and a washer 33, and as described above, the fixture 3 is stored inside the accommodating portion 21 when the handrail post 2 is fixed to the floor 1.

[0016] As shown in Figure 2(A), the flanged bolt 31 has a disc-shaped flange portion 312 and an elongated cylindrical shaft portion 311, with the lower end of the shaft portion 311 welded to the center of the flange portion 312. A screw thread is formed on part or all of the upper end side of the side of the shaft portion 311 so that it can be screwed into a nut 32. As shown in Figure 2(C), the flange portion 312 has a circular shape in plan view, and a plurality of 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.

[0017] 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, with a width and height that are approximately equal, as shown in Figure 2(B). The bolt hole 331 of the washer 33 is drilled approximately in the center in plan view, as shown in Figure 2(B), with a diameter slightly larger than the diameter of the shaft portion 311 of the flanged bolt 31. Note that the plan view shape of the washer 33 does not necessarily have to be roughly square; for example, it may be a rectangle other than a roughly square, but considering the cost, it is desirable that it be a square in plan view with equal width and depth in front view, or a rectangle with a slightly longer depth, as this can save material volume while ensuring strength.

[0018] Next, the configuration of the handrail post 2 according to the present embodiment will be described with reference to Fig. 3. As shown in Fig. 3(A), a fastening hole 211 is formed at the left-right center of the front surface of the handrail post 2. In the present embodiment, the fastening hole 211 is a so-called "blind hole" that does not penetrate the handrail post 2, and is bored to a size capable of accommodating at least the washer 33 and the nut 32. As described above, by making the fastening hole 211 a blind hole in the present embodiment, only one side surface of the handrail post 2 can be covered with the wooden plug 22, and the other surface can be left as the base material. In addition, the missing portion of the handrail post 2 at the plane cross-section portion of the fastening hole 211 can be reduced compared to the case where it is a through hole, so that a decrease in the strength of the handrail post 2 can be avoided, which is desirable. Further, in the present embodiment, the vertical cross-sectional shape of the fastening hole 211 is a perfect circle, and its radius is equal to the radius of the arc portion of the washer 33 which is a half-moon washer when viewed from the front. However, the vertical cross-sectional shape of the fastening hole 211 is not limited to a perfect circle. If the shape of the washer 33 is other than a half-moon washer, and its lower surface matches the bottom surface of the fastening hole 211, the vertical cross-sectional shape of the fastening hole 211 may be a shape other than a perfect circle, such as a rectangle.

[0019] As shown in Fig. 3(B), at the center of the bottom surface of the handrail post 2, a flange portion accommodation hole 213 for accommodating the flange portion 312 of the flanged bolt 31 is hollowed out. The flange portion accommodation hole 213 is a cylindrical space that is the same as or slightly larger than the outer shape of the disc-shaped flange portion 312. The circular shape of its bottom surface is the same as or slightly larger than the circular shape that is the outer shape of the planar view shape of the flange portion 312, and it is hollowed out so that its height is the same as or slightly higher than the height of the flange portion 312.

[0020] The shaft through-hole 212 is a space for accommodating the shaft portion 311 of the flanged bolt 31. As shown in Fig. 3(B) and Fig. 3(C), the shaft through-hole 212 is bored from the center of the flange portion accommodation hole 213 when viewed from the bottom surface, vertically upward inside the handrail post 2, and communicates with the fastening hole 211. That is, as shown in Fig. 3(C), the fastening hole 211 and the flange portion accommodation hole 213 communicate with each other inside the handrail post 2 via the shaft through-hole 212, and the communicating fastening hole 211, shaft through-hole 212 and flange portion accommodation hole 213 collectively form an accommodation portion 21.

[0021] Next, the procedure for fixing the handrail support post of the embodiment of the present invention to the floor will be explained using Figure 4. The first step is to place the flanged bolt 31 in a predetermined position on the floor 1, and to screw the wood screw 4 into the floor 1 through the screw hole 34, as shown in Figure 4(A), thereby fixing the flanged bolt 31 to the floor 1.

[0022] When screwing the wood screw 4 into the floor 1, depending on the structure of the floor 1, it may interfere with beam support fittings or the like inside the floor 1, preventing it from being screwed all the way in. In such cases, in the embodiment of the present invention, the flange portion can be rotated around the center of the shaft portion 311 to move the position of the screw hole 314, thereby avoiding interference with the beam support fittings or the like. That is, since the fastener 3 including the flanged bolt 31 is installed on the upper surface of the floor 1 and does not penetrate into the interior of the floor 1, the fastener 3 does not interfere with beam support fittings or the like inside the floor 1, and it is possible to fix the flanged bolt 31 to the floor 1 by avoiding interference between the beam support fittings or the wood screw 4 and the like simply by moving the screw hole 314. Thus, since the flange portion 312 is perfectly circular in plan view, it is easy to rotate the flanged bolt 311 to the position of the screw hole 314 after positioning it, and interference between the beam support fittings or the wood screw 4 and the like can be easily avoided.

[0023] The second step, as shown in Figure 4(B), is to insert the shaft portion 311 of the flanged bolt 31 fixed to the floor 1 into the through-hole 212 at the bottom of the handrail support 2. At this time, when the upper end of the shaft portion 311 of the flanged bolt 31 reaches the fastening hole 211, a washer 33 and a nut 32 are inserted through the front opening of the fastening hole 211, the upper end of the shaft portion 311 that has reached the fastening hole 211 is inserted through the washer 33, and the nut 32 is screwed on.

[0024] When screwing this nut 32 onto the upper end of the shaft portion 311, the final adjustment of the front angle of the handrail support 2 is performed. In carrying out this procedure, the outer shape of the flanged bolt 31 and the internal shapes of the flange housing hole 213 and through shaft hole 212 are almost identical, and both are rotating bodies, so the final adjustment of the front angle of the handrail support 2 can be easily performed.

[0025] The third step is to fully fasten the nut 32 and cover the opening of the fastening hole 211 with the wooden plug 22, as shown in Figure 4(C), to achieve a good aesthetic finish. At this time, the plan view shape of the washer 33 is a rectangle in which the width and height are approximately equal or the height is longer, and the lower surface of the washer 33 is in contact with the inner surface of the fastening hole 211 with the same curved surface, so that it can firmly withstand a strong horizontal load applied to the upper end of the handrail support 2 from any direction.

[0026] Thus, in the third step, the handrail support 2 is fastened by clamping the inside of the handrail support 2 with the flange 312 and nut 32 from the longitudinal direction of the handrail support 2. As a result, loosening due to wood shrinkage or other factors does not occur, and it can be used safely for a long period of time. [Industrial applicability]

[0027] This invention can be applied to the connection structure of handrail posts. [Explanation of Symbols]

[0028] 1 bed 2 Handrail posts 21 Storage Unit 211 Fastening hole 212 Shaft hole 213 Flange housing hole 22 Wood plug 3 Fixtures 31 Flanged bolt 311 Shaft 312 Guard section 314 screw holes 32 nuts 33 Half-moon washer 4 wood screws

Claims

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 on the upper surface of the floor, the fixing device does not penetrate into the interior of the floor, and the entire device is stored inside the housing.

3. The handrail support connection structure according to claim 1, characterized in that the fastener comprises a washer provided between the opening on the upper end side 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 washer is characterized by having a columnar shape with a roughly crescent-shaped base that fits onto the outer circumference of the circle. The handrail support post connection structure according to claim 3.

5. The length of the washer in the depth direction when the handrail support is fixed is characterized by being approximately the same as or slightly longer than the length in the left-right direction. The handrail support post connection structure according to claim 4.

6. The handrail support post connection structure according to claims 1 to 5, characterized in that the flange portion of the flanged bolt has a circular shape in plan view.

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