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 support column of a handrail installed indoors to the floor.

Background Art

[0002] In the case of a handrail at a position contacting an indoor atrium where the terminal end cannot be fixed to a wall, the end portion will be made to stand on its own only with the handrail support column. For a handrail support column in such a position, for example, a tenon is provided at the lower end portion, a tenon hole is drilled in the floor beam, the tenon is inserted, and a plug is passed through the tenon and the tenon hole from the side surface of the floor beam for fixing (Non-Patent Document 1, Non-Patent Document 2). This method has a beautiful finish and can be fixed firmly, but on the other hand, it requires a high level of skill in joint processing. In addition, when the position where the handrail support column is erected on the floor beam is a joint portion with another beam, there is a problem that the joint processing becomes even more difficult.

[0003] As a method for fixing a handrail support column to the floor that does not require joint processing on the floor beam, for example, a column support is fixed to the upper surface of the floor material with a wood screw or the like, a fitting portion that fits the shape of the column support is recessed on the bottom surface of the leg portion of the handrail support column, the column support is penetrated into the fitting portion, and a fixing screw is screwed in towards the column support from the side surface of the handrail support column for fixing. (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]FIG. 4 is a perspective view showing the procedure for fixing the handrail support column of an embodiment of the present invention to the floor. (A) represents the step of fixing a bolt with a flange to the floor, (B) represents the step of attaching the handrail support column to the bolt with a flange, and (C) represents the step of fastening the handrail support column and the bolt with a flange with a nut.

Embodiments for Carrying out the Invention

[0012] The structure of the handrail support column 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 of the handrail support column according to the present embodiment with the floor will be described using FIG. 1.

[0013] As shown in FIG. 1(A), the handrail support column 2 stands on the upper surface of the floor 1. The material of this handrail support column 2 is wood, and as shown in FIG. 1(B), it has an accommodation portion 21 inside. The accommodation portion 21 is composed of a fastening hole 211, a through-axis hole 212, and a flange portion accommodation hole 2"13 from above. As shown in FIG. 1(A), the fastening hole 211 is drilled in the front surface of the handrail support column 2 and is covered with a wooden plug 22. Note that the material of the wooden plug 22 does not necessarily have to be wood as long as it harmonizes aesthetically with the surface of the handrail support column 2.

[0014] As shown in FIG. 1(B), when the handrail support column 2 is fixed to the floor 1, the entire fixture 3 is stored inside the accommodation portion 21.

[0015] Next, the configuration of the fixture 3 according to the present embodiment will be described using FIGS. 1 and 2. The fixture 3 is composed of a bolt 31 with a flange, a nut 32, and a washer 33 as shown in the figure. As described above, the fixture 3 is stored inside the accommodation portion 21 when the handrail support column 2 is fixed to the floor 1. [[ID=*21]]

[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 support column 2 according to the present embodiment will be described with reference to FIG. 3. As shown in FIG. 3(A), fastening holes 211 are formed at the left and right centers on the front surface of the handrail support column 2. In the present embodiment, the fastening holes 211 are so-called "blind holes" that do not penetrate the handrail support column 2, and are drilled to a size that can accommodate at least the washer 33 and the nut 32. Thus, by making the fastening holes 211 blind holes in the present embodiment, only one side surface of the handrail support column 2 can be covered with the wooden plug 22, and the other surfaces can be left as they are. Also, it is desirable to reduce the loss part of the handrail support column 2 in the flat cross-sectional part of the fastening hole 211 compared to making it a through hole, so as to avoid a decrease in the strength of the handrail support column 2. 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 part of the washer 33, which is a semi-circular 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 semi-circular washer and the lower surface thereof coincides with 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), a flange accommodation hole 213 for accommodating the flange part 312 of the bolt 31 with a flange is hollowed out at the center of the bottom surface of the handrail support column 2. The flange accommodation hole 213 is a cylindrical space that is the same as or slightly larger than the outer shape of the disc-shaped flange part 312. The circle on the bottom surface thereof is the same as or slightly larger than the circle that is the outer shape of the flange part 312 in a plan view, and its height is hollowed out so as to be the same as or slightly higher than the height of the flange part 312.

[0020] The through-axis hole 212 is a space for accommodating the shaft part 311 of the bolt 31 with a flange. As shown in FIGS. 3(B) and 3(C), it is drilled vertically upward from the center of the bottom surface view of the flange accommodation hole 213 into the inside of the handrail support column 2 and communicates with the fastening hole 211. That is, as shown in FIG. 3(C), the fastening hole 211 and the flange accommodation hole 213 communicate with each other inside the handrail support column 2 through the through-axis hole 212. These communicating fastening holes 211, through-axis hole 212, and flange accommodation hole 213 together form the accommodation part 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 any one of 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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