Handrail support mounting structure

Abstract

The present invention provides a mounting structure for a handrail post that ensures the desired mounting strength to a concrete structure. [Solution] The handrail support mounting structure according to the present invention is a handrail support mounting structure X for attaching the lower end Hb side of a handrail support HP to a concrete structure (concrete staircase C) to which a handrail support is to be attached, and is characterized by comprising: an embedded member 1 embedded and fixed to the concrete structure so that its surfaces 11f and 11g are exposed; a mounting portion 2 fixed to the surface 11f of the embedded member by welding; and a fixing member 3 that fixes the lower end Hb side of the handrail support HP to the mounting portion 2.

Description

Technical Field

[0001] The present invention relates to a mounting structure for a handrail post to a concrete structural portion.

Background Art

[0002] A handrail post mounting structure is known in which handrail posts are mounted to the side surfaces of concrete structural portions such as rooftop sections, veranda floor sections, and stairs using anchor bolts (see Patent Document 1). That is, in the handrail post mounting structure, a mounted part to which the lower end side of the handrail post is attached is fixed to the side surface of the concrete structural portion using anchor bolts, and the lower end side of the handrail post is attached to the mounted part fixed to the side surface of the concrete structural portion. As the anchor bolts, anchor bolts embedded in advance so as to protrude from the side surface of the concrete structural portion, post-installed anchor bolts that are post-installed to the side surface of the concrete structural portion, and the like are used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a structure in which the mounting portion of a handrail post is fixed to the side of a concrete structure using anchor bolts, if the anchor bolts are placed close to the top surface of the concrete structure, the concrete cover above the anchor bolts becomes thin. Consequently, in this case, there is a risk that the top surface of the concrete structure may crack. If the concrete structure cracks, the anchor bolts will no longer be supported by the concrete structure, and the mounting strength of the handrail post mounting structure via the mounting portion and anchor bolts will be lost. Therefore, for example, when the vertical width dimension of the side surface of the concrete structure is small, there was a problem in that the mounting strength could not be ensured when a mounting structure was adopted in which the mounting portion to which the lower end of the handrail post is attached is fixed to the side surface of the concrete structure using anchor bolts. The present invention has been made in view of the above-mentioned problems and provides a handrail post mounting structure that can ensure the desired mounting strength to a concrete structure. [Means for solving the problem]

[0005] The handrail support mounting structure according to the present invention is a handrail support mounting structure for attaching the lower end of a handrail support to a concrete structure to which a handrail support is to be attached, and is characterized by comprising: an embedded member embedded and fixed in the concrete structure so as to have its surface exposed; a mounting portion fixed to the surface of the embedded member by welding; and a fixing member for fixing the lower end of the handrail support to the mounting portion. Furthermore, the embedded member and the part to be attached are characterized by being composed of a member with an L-shaped cross-section. Furthermore, the lower end of the handrail support and the mounting portion are fixed together by a fixing member consisting of a bolt passing through a bolt hole formed to penetrate both the mounting portion and the lower end of the handrail support, and a nut fastened to the bolt. Furthermore, the concrete structure is a concrete staircase, the embedded member is embedded in the concrete staircase so as to span the tread and side surface of the concrete staircase, and the attachment portion is fixed by welding to the surface of the embedded member located on the side surface of the concrete staircase. Furthermore, it is characterized by having a side cover plate that covers the lower end of the handrail support post, which is fixed by a fixing member, and the mounting portion, with the plate surface facing the side of the concrete staircase parallel to it. Furthermore, it is characterized by comprising a tread cover plate provided to cover the tread surface of the concrete staircase and a riser cover plate provided to cover the riser surface of the concrete staircase. The handrail support mounting structure according to the present invention makes it possible to provide a handrail support mounting structure that can secure a desired mounting strength to a concrete structure. [Brief explanation of the drawing]

[0006] [Figure 1] A perspective view showing the mounting structure of the handrail support (Embodiment 1). [Figure 2] A perspective view (Embodiment 1) showing an embedded member embedded in a concrete structure and a part to be attached to the embedded member by welding. [Figure 3] A perspective view showing the back (inner surface) side of the buried member (Embodiment 1). [Figure 4] A diagram showing a staircase constructed using a handrail support mounting structure (Embodiment 1). [Figure 5] A cross-sectional view (Embodiment 1) showing the relationship between the mounting structure of the handrail support and the side cover plate. [Modes for carrying out the invention]

[0007] Embodiment 1 The mounting structure for a handrail post according to Embodiment 1 is a structure for attaching the lower end of a handrail post to a concrete structure to which the handrail post is to be attached. As shown in Figure 1, the mounting structure X for the handrail post HP comprises an embedded member 1 embedded and fixed to the concrete structure with its surface exposed, a mounting portion 2 fixed to the surface of the embedded member 1 by a welded portion w, and a fixing member 3 that fixes the lower end Hb side of the handrail post HP to the mounting portion 2. The fixing member 3 is composed of, for example, a bolt 30 and a nut 31.

[0008] Concrete structures are concrete structures where handrails may be installed, such as stairs, corridors, balcony floors, and rooftops. The following explanation will use concrete stairs C as an example of a concrete structure.

[0009] The embedded member 1 is embedded in the concrete stairs C so as to span the tread Ct and the side surface Cs of the concrete stairs C. As shown in Figure 3, the embedded member 1 is composed of, for example, a long member 11 whose cross-section perpendicular to the longitudinal direction is L-shaped, and an anchoring member 12 that is fixed to the concrete of the concrete stairs C.

[0010] The elongated member 11 is a metal member with an L-shaped cross-section, such as a long steel plate, formed by bending such that the angle between one plate surface 11d of one flat plate 11a and one plate surface 11e of the other flat plate 11b is 90°. Hereinafter, one plate surface 11d of one flat plate 11a of the elongated member 11 will be referred to as the "back surface (inner surface) 11d," and one plate surface 11e of the other flat plate 11b will be referred to as the "back surface (inner surface) 11e." Also, hereafter, the other plate surface 11f of one flat plate 11a of the elongated member 11 will be referred to as the "front surface (outer surface) 11f," and the other plate surface 11g of the other flat plate 11b will be referred to as the "front surface (outer surface) 11g" (see Figures 1 and 2).

[0011] As shown in Figure 3, the anchoring member 12 is composed of a pair of anchoring bars 12a and 12b, which are provided to protrude from the boundary 11c between the back surface 11d of one flat plate 11a of the long member 11 and the back surface 11e of the other flat plate 11b. The base ends 12e of the anchoring bars 12a and 12b are welded to the boundary 11c. The tip ends 12t of the anchoring bars 12a and 12b are bent and configured to extend along the longitudinal direction of the long member 11 (the direction along the boundary 11c). The anchoring bars 12a and 12b are provided at predetermined intervals in the direction along the boundary 11c. Furthermore, the tip ends 12t of the anchoring bar 12a and the tip ends 12t of the anchoring bar 12b are configured to extend in directions away from each other, for example.

[0012] The embedded member 1 is installed in a formwork (not shown) such that the back surface 11d of one flat plate 11a, the back surface 11e of the other flat plate 11b, and the anchoring member 12 are embedded in the concrete. When concrete is poured into the formwork and the concrete stairs C is constructed, the embedded member 1 is embedded in the concrete so that the back surface 11d of one flat plate 11a, the back surface 11e of the other flat plate 11b, and the anchoring member 12 are embedded in the concrete, and the anchoring member 12 is anchored to the concrete. That is, the embedded member 1 is installed embedded in the concrete such that the surface 11f of one flat plate 11a is exposed to the side surface Cs of the concrete stairs C, and the surface 11g of the other flat plate 11b is exposed to the tread Ct of the concrete stairs C (see Figures 1 and 2).

[0013] As shown in Figures 1 and 2, the mounting portion 2 is composed of, for example, a pair of L-shaped members 20, 20. The L-shaped member 20 is a metal member, such as a steel plate, with an L-shaped cross-section, formed by bending such that the angle between one plate surface 20d of one flat plate 20a and one plate surface 20e of the other flat plate 20b is 90°. In the example shown in Figures 1 and 2, the lower part of the other flat plate 20b extends below the lower end of the one flat plate 20a, so a part (lower side) of the L-shaped member 20 is not L-shaped in cross-section. However, the cross-sectional shape of the L-shaped member 20 is not limited to the example shown in Figures 1 and 2. For example, the L-shaped member 20 may be a member in which the edges of both lower ends of the flat plates 20a and 20b are flush. That is, the L-shaped member 20 may be a member in which any cross-section perpendicular to the vertical direction in Figures 1 and 2 is L-shaped. Hereinafter, one plate surface 20d of one flat plate 20a of the L-shaped member 20 will be referred to as the "back surface (inner surface) 20d," and one plate surface 20e of the other flat plate 20b will be referred to as the "back surface (inner surface) 20e." Also, hereafter, the other plate surface 20f of one flat plate 20a of the L-shaped member 20 will be referred to as the "front surface (outer surface) 20f," and the other plate surface 20g of the other flat plate 20b will be referred to as the "front surface (outer surface) 20g." The other flat plate 20b has bolt holes 21 formed therein for passing bolts 30 through. As shown in Figure 2, for example, at least two of these bolt holes 21 are provided on the other flat plate 20b at predetermined intervals in the vertical direction.

[0014] The L-shaped member 20 is disposed such that the boundary 20c between the back surface 20d of one flat plate 20a and the back surface 20e of the other flat plate 20b extends in the vertical direction, and is installed such that the front surface 20f of the one flat plate 20a is in contact with the front surface 11f of the one flat plate 11a of the embedded member 1. Then, the L-shaped member 20 is fixed to the embedded member 1 by welding. The welded portion w between the L-shaped member 20 and the embedded member 1 is preferably all of the boundary portions shown below, but may be at least one or more of the boundary portions shown below. ·The boundary portion between the edge surface 20h of one flat plate 20a of the L-shaped member 20 and the front surface 11f of the one flat plate 11a of the embedded member 1. ·The boundary portion between the front surface 20f of one flat plate 20a of the L-shaped member 20 and the front surface 11g of the other flat plate 11b of the embedded member 1. ·The boundary portion between the front surface 20g of the other flat plate 20b of the L-shaped member 20 and the front surface 11f of the one flat plate 11a of the embedded member 1. Further, the welding is preferably continuous line welding along the above-described boundary portions, but may be intermittent line welding or spot welding.

[0015] The pair of L-shaped members 20, 20 are fixed to the embedded member 1 such that the front surfaces 20g, 20g of the other flat plates 20b, 20b face each other in parallel. The interval between the front surfaces 20g, 20g of the other flat plates 20b, 20b of the pair of L-shaped members 20, 20 is configured to be an interval corresponding to the diameter dimension of the handrail post HP.

[0016] A bolt through hole 22 for allowing the bolt 30 to pass through is formed on the side surface on the lower end Hb side of the handrail post HP. Corresponding to the bolt through holes 21, at least two bolt through holes 22 are provided at predetermined intervals in the vertical direction of the handrail post HP, for example, as shown in Figure 1.

[0017] The lower end Hb side of the handrail post HP is placed between the surfaces 20g, 20g of the other flat plates 20b, 20b of the pair of L-shaped members 20, 20. Then, the bolt through-hole 22 formed in the handrail post HP is aligned with the bolt through-holes 21 formed in the other flat plates 20b, 20b of the pair of L-shaped members 20, 20. Thereafter, the bolt 30 is passed through the bolt through-holes 21, 22, 21, and the nut 31 is fastened to the tip end side of the passed bolt 30, whereby the lower end Hb side of the handrail post HP is attached to the mounted portion 2. As described above, the mounting structure X for the handrail post HP, in which the handrail post HP is attached to the side surface Cs of the concrete staircase C via the mounted portion 2 and the embedded member 1, is configured.

[0018] An example of a staircase adopting the mounting structure X for the handrail post HP according to Embodiment 1 is shown in Figure 4. Figure 4 exemplifies a staircase handrail configured to include the handrail post HP, a handrail top HK, and horizontal rails HC. Further, Figure 4 exemplifies a staircase configured by providing a side face cover plate 4, a tread cover plate 5, and a riser face cover plate 6 on the surface side of the concrete staircase C. That is, as shown in Figure 4 and Figure 5, the side face cover plate 4 is provided so as to cover the lower end Hb side of the handrail post HP of the mounting structure X and the mounted portion 2, with its plate face facing parallel to the side face Cs of the concrete staircase C. Further, as shown in Figure 4 and Figure 5, the tread cover plate 5 is provided so as to cover the tread of the concrete staircase C. Further, as shown in Figure 4, the riser face cover plate 6 is provided so as to cover the riser face of the concrete staircase C. In Figure 4, F denotes a floor, and WS denotes a wall.

[0019] In the staircase employing the mounting structure X according to Embodiment 1, a side cover plate 4 is provided that covers the lower end Hb side of the handrail support HP and the mounting part 2, with the plate surface facing the side surface Cs of the concrete staircase C parallel to it, so that the mounting structure X is not visible from the side. Furthermore, in the staircase employing the mounting structure X of Embodiment 1, a tread cover plate 5 is provided to cover the tread Ct of the concrete staircase C, and a riser cover plate 6 is provided to cover the riser surface of the concrete staircase C, thus improving aesthetics and design. In other words, in the staircase employing the mounting structure X of Embodiment 1, the side cover plate 4, tread cover plate 5, and riser cover plate 6 are provided on the surface side of the concrete staircase C, so that a staircase with excellent aesthetics and design can be provided.

[0020] Furthermore, according to the handrail support mounting structure X of Embodiment 1, since it does not use anchor bolts like those used in the conventional structure disclosed in Patent Document 1, for example, it is possible to provide a handrail support mounting structure that can secure the desired mounting strength to the concrete staircase (concrete structure) C.

[0021] For example, as shown in Figure 5, if the thickness of each concrete block of each step of the concrete staircase C is thin and the vertical width dimension H1 of each step's side Cs is small, then a side cover plate 4 with a smaller vertical width dimension H2 will be used to correspond to the vertical width dimension H1 of the side Cs. In this case, in order to prevent the lower end Hb of the handrail support HP and the mounting part 2 from being visible from the side, it is necessary to position the lower end Hb of the handrail support HP and the mounting part 2 above the lower end of the side cover plate 4, which inevitably requires moving the position of the mounting part 2 upwards. Therefore, if the mounting part 2 is fixed to the concrete staircase C using anchor bolts as in the conventional method, the anchor bolts will be placed close to the top surface (tread Ct) of the concrete staircase C, increasing the likelihood that the tread Ct side of the concrete staircase C will crack. On the other hand, in the mounting structure X according to Embodiment 1, the mounting portion 2 is welded and fixed to the embedded member 1 embedded in the concrete staircase C. Therefore, even if the position of the mounting portion 2 is moved upward, the concrete will not crack, and the mounting strength will be maintained. Accordingly, according to the handrail support mounting structure X according to Embodiment 1, it is possible to provide a handrail support mounting structure that can secure the desired mounting strength to the concrete staircase C, even when, for example, the vertical width dimension H1 (see Figure 5) of the side surface Cs of the concrete staircase C is small.

[0022] Embodiment 2 It goes without saying that the handrail support mounting structure according to the present invention can also be applied to cases where handrail supports are attached to concrete structures other than the concrete staircase C described above as a concrete structure, such as corridors, veranda floors, and rooftops.

[0023] Furthermore, as the bolt 30, a double-ended bolt that passes through the bolt holes 21, 22, 21 may be used as a fixing means, and nuts 31 may be fastened to both ends of the double-ended bolt that passes through the bolt holes 21, 22, 21. [Explanation of symbols]

[0024] 1. Buried member 2 Mounted part 3 Fixing member 4 Side cover plate 5 Tread cover plate 6. Kick plate 21, 22 Bolt holes 30 volts 31 nuts C. Concrete staircase (concrete structural part) Side of Cs concrete staircase Ct Concrete stair tread HP Handrail Support Hb Lower end of handrail support X Handrail support mounting structure

Claims

1. A mounting structure for a handrail post, for attaching the lower end of a handrail post to a concrete structure to which a handrail post is to be attached, An embedded member fixed to the concrete structure so that its surface is exposed, The mounting portion is fixed to the surface of the buried member by welding, A mounting structure for a handrail post, characterized by comprising a fixing member that secures the lower end of the handrail post to the part to be attached.

2. The mounting structure for a handrail post according to claim 1, characterized in that the embedded member and the part to be attached are made of a member with an L-shaped cross-section.

3. The mounting structure for a handrail post according to claim 1, characterized in that the lower end of the handrail post and the mounting portion are fixed by a fixing member consisting of a bolt passing through a bolt hole formed to penetrate the mounting portion and the lower end of the handrail post, and a nut fastened to the bolt.

4. The concrete structure is a concrete staircase. The embedded component is embedded in the concrete staircase so as to span both the tread and the side of the concrete staircase. The mounting structure for a handrail post according to any one of claims 1 to 3, characterized in that the mounting portion is fixed by welding to the surface of an embedded member located on the side of a concrete staircase.

5. The mounting structure for a handrail post according to claim 4, characterized in that it includes a side cover plate that covers the lower end of the handrail post fixed by a fixing member and the part to be attached, with the plate surface facing the side of the concrete staircase parallel to it.

6. The mounting structure for a handrail post according to claim 5, characterized by comprising a tread cover plate provided to cover the tread surface of a concrete staircase and a riser cover plate provided to cover the riser surface of a concrete staircase.

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