Staircase handrail substructure between floors

Abstract

To provide a substrate structure fixing a bracket portion of a stair handrail to an inter-floor part.SOLUTION: A stair handrail substrate structure 1 in an inter-floor part is a structure serving as a fixed substrate for fixing a bracket 21 supporting a stair handrail 2 of a stair 100 to an indoor wall of an inter-floor part 3. The stair handrail substrate structure 1 comprises: an inside wall board 7 becoming the indoor wall; and a substrate member 5 provided on an indoor side face of a web 41 of a steel girth 4 located in the inter-floor part 3 and receiving an indoor side face of the inside wall board 7 to prevent the inside wall board 7 from being displaced (pushed-in) toward the web 41 side.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a staircase handrail base structure that serves as a fixed base for fixing a bracket that supports a staircase handrail to the inner wall surface of the landing between floors.

Background Art

[0002] Patent Document 1 discloses a partition wall for a return staircase that can suppress a decrease in the out-of-plane rigidity of the partition wall and an increase in displacement caused thereby even when the thickness of the partition wall is reduced. This partition wall is composed of a lower straight staircase portion, a turning portion, and an upper straight staircase portion. And, the partition wall that divides the lower straight staircase portion and the upper straight staircase portion has a frame base material having vertical and horizontal members, a first reinforcing metal member extending in the horizontal direction, and a plurality of surface materials disposed around the frame base material and the first reinforcing metal member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the above conventional structure does not disclose a base structure for fixing the bracket portion of the staircase handrail in the landing.

[0005] An object of the present invention is to provide a staircase handrail base structure that serves as a fixed base for fixing the bracket portion of the staircase handrail in the landing.

Means for Solving the Problems

[0006] The inter-floor stair handrail base structure of this invention is a stair handrail base structure that serves as a fixing base for fixing brackets supporting the stair handrail to the indoor wall of the inter-floor section, and is characterized by comprising: an interior wall board that forms the indoor wall; and a base member provided on the indoor side of the web of the steel frame girders located in the inter-floor section, which receives the back side of the interior wall board.

[0007] With the above-described stair handrail base structure, when installing a stair handrail using this structure, a bracket that supports the stair handrail can be placed on the indoor side of the interior wall board, and the fixing screws for the bracket can be screwed into the base member from the indoor side of the interior wall board, thereby fixing the bracket to the indoor side of the interior wall board. The bracket can be installed at any position along the extension direction of the steel frame girders in the inter-floor section and within the placement range of the base member.

[0008] Furthermore, in a structure where plywood or similar material is installed on the indoor end of the steel frame girders to serve as a handrail base, a problem may arise where the indoor wall is thickened by the plywood, making it impossible to secure the effective width of the staircase. However, this problem will not occur with this design.

[0009] The above-mentioned base member may include a receiving member whose back surface is fixed to the web of the steel frame girder, and a plate member whose back surface is received by the indoor surface of the receiving member, and whose indoor surface is flush with the indoor end surface of the steel frame girder or positioned on the indoor side of that end surface. This eliminates the need to use large block-shaped timbers or the like as the base member, thus reducing the amount of materials and improving work efficiency.

[0010] Above the steel frame girders mentioned above, other base members are positioned to support the back side of the interior wall boards mentioned above. A horizontal batten is fixed to the ceiling suspension runner located below the steel frame girder mentioned above, which supports the back side of the interior wall board. The steel plate positioned on the exterior side of the interior wall board may be fixed to the base member, the other base members, and the horizontal bar of the ceiling suspension runner. This allows the resistance to peeling of the base member inward, when the base member is fixed to the web of the steel frame girder with adhesive, for example, to be shared and borne by the other base members and the ceiling suspension runner via the steel plate. Furthermore, it becomes possible to fix the bracket at any position within the range of placement of the steel plate. Since the steel plate is fixed to the base member, the other base members, and the ceiling suspension runner as described above, the steel plate can be placed over a wide range.

[0011] The above-mentioned other base members may include another receiving member fixed to a metal fitting positioned above the steel frame girders, and another plate member whose back surface is supported by the indoor side surface of the other receiving member, and whose indoor side surface is flush with the indoor end surface of the steel frame girders or positioned on the indoor side of that end surface. This makes it possible to standardize the constituent materials of the other base members and the above-mentioned base members. [Effects of the Invention]

[0012] With this invention, since it is not necessary to thicken the wall, the required effective width of the staircase can be easily secured, and the brackets for the staircase handrail can be installed at any position within the base placement range. [Brief explanation of the drawing]

[0013] [Figure 1] This diagram shows a schematic cross-section of the stair railing base structure in the inter-floor section of the embodiment, and an explanatory diagram showing the relationship between the structure, the steel frame girders, and steel plates, etc. [Figure 2] This is an explanatory diagram showing the handrail, stairs, and interior walls in the stair handrail base structure of the inter-floor section of the embodiment. [Figure 3] This is a cross-sectional view showing an enlarged section of the stair railing base structure in the inter-floor section of the embodiment. [Figure 4] Figure 3 is a schematic perspective view of the stair railing substructure in the inter-floor area. [Figure 5] Figure 3 is a schematic exploded perspective view of the stair railing substructure in the inter-floor area. [Modes for carrying out the invention]

[0014] The embodiments will be described below with reference to the attached drawings. As shown in Figures 1 and 2, the stair handrail base structure 1 in the inter-floor section of the embodiment serves as a fixing base for fixing the bracket 21 that supports the stair handrail 2 on the staircase 100 to the indoor side (front side) of the indoor wall of the inter-floor section 3. The inter-floor section 3 is provided with a steel frame girder 4 made of, for example, H-shaped steel.

[0015] As shown in Figures 3 and 4, the staircase handrail base structure 1 comprises a base member 5, a steel plate 6, and an interior wall board 7.

[0016] The base member 5 is attached to the web 41 of the steel frame girders 4 and supports the outdoor side (back side) of the interior wall board 7, preventing the interior wall board 7 from being displaced (pushed in) toward the web 41. Note that the back side of the interior wall board 7, battens 51, etc., is not necessarily the outdoor side, but may be the side of the open space. The base member 5 includes, for example, a batten (receiving member) 51 whose outdoor side is fixed to the indoor side of the web 41 of the steel frame girders 4, and a plate member 52 made of plywood or the like with a thickness of about 12 mm, which is fixed to the indoor side of the batten 51 and whose indoor side is positioned flush with the indoor end face of the steel frame girders 4 or further indoor than that end face. The outdoor side of the plate member 52 is located further outdoors than the indoor end face of the steel frame girders 4. The height of the plate member 52 is lower than the height between the opposing surfaces of the upper and lower flanges of the steel frame girders 4.

[0017] In this embodiment, the amount of inward protrusion of the indoor side surface of the plate member 52 relative to the indoor end face of the steel frame girder 4 is in the range of 1 to 10 mm.

[0018] The crossbars 51 are made of a wooden member or the like with a square cross-section, and two are arranged vertically. In this example, the crossbars 51 are adhesively fixed to the web 41 with an adhesive. Also, the plate member 52 is screwed to the crossbar 51 with a pan head screw 500.

[0019] The steel plate 6 is located on the outdoor side of the inner wall board 7 and is fixed to the indoor side surface of the plate member 52 in the base member 5 with a pan head tapping screw 601. The thickness of the steel plate 6 is, for example, about 0.5 mm, the height of the steel plate 6 is higher than the height of the steel frame body difference 4 (for example, about 250 mm) (for example, about 500 mm), and the width of the steel plate 6 is, for example, about 910 mm that can span a plurality of inner wall boards 7 horizontally.

[0020] Another base member 5A for receiving the outdoor side surface of the inner wall board 7 is arranged on the upper flange 42 of the steel frame body difference 4. This other base member 5A includes another crossbar (another receiving member) 51A arranged above the steel frame body difference 4 and another plate member 52A whose indoor side surface is flush with or located on the indoor side of the indoor side end surface of the steel frame body difference 4. Also, the outdoor side surface of the other plate member 52A is located on the outdoor side of the indoor side end surface of the steel frame body difference 4.

[0021] In this embodiment, the amount of protrusion of the indoor side surface of the other plate member 52A in the indoor direction with respect to the indoor side end surface of the steel frame body difference 4 is in the range of 1 to 10 mm, which is the same as the above-mentioned protrusion amount in the base member 5.

[0022] The other crossbar 51A is screwed to the vertical plate portion of the metal fitting 501 bolted to the upper flange 42 of the steel frame body difference 4 with a pan head drill screw 502. The other plate member 52A is made of a plywood with a thickness of about 12 mm.

[0023] A connecting portion 81 of a ceiling suspension runner 8 is bolted to the lower side of the lower flange 43 of the steel frame girder 4. A horizontal bar 82 that supports the outdoor side of the interior wall board 7 is screwed to the lower side of this connecting portion 81 with self-drilling screws 801. The indoor side of the horizontal bar 82 is positioned flush with the indoor end face of the steel frame girder 4 or on the indoor side of that end face. In this embodiment, the amount of inward protrusion of the indoor side of the horizontal bar 82 relative to the indoor end face of the steel frame girder 4 is in the range of 1 to 10 mm, which is the same as the amount of protrusion of the base member 5.

[0024] The steel plate 6 is also fixed to the indoor side of the other plate member 52A with countersunk tapping screws 601. Furthermore, the steel plate 6 is also fixed to the horizontal bar 82 of the ceiling suspension runner 8 with countersunk tapping screws 601. In other words, the steel plate 6 integrates the plate member 52, the other plate member 52A, and the horizontal bar 82 of the ceiling suspension runner 8.

[0025] The interior wall board 7 forms the interior wall of the staircase and is made of, for example, 12.5 mm thick gypsum board. The interior wall board 7 is fixed to other board members 52A and the horizontal battens 82 of the ceiling suspension runner 8 with board fixing screws 701.

[0026] In the construction of the above-described stair handrail base structure 1, as shown in Figure 5, two battens 51 are glued to the web 41 of the steel frame girders 4, and a plate member 52 is screwed to the indoor side of the battens 51 with countersunk screws 500. In addition, another batten 51A is screwed to the vertical plate surface of the metal fitting 501 on the upper flange 42 with countersunk self-drilling screws 502, and another plate member 52A is screwed to the indoor side of the other batten 51A with countersunk screws 500. The metal fitting 501 is, Interior wall support base material This is a support fitting that supports 9. Next, the steel plate 6 is fixed to the plate member 52, the other plate members 52A, and the horizontal bar 82 of the ceiling suspension runner 8 with countersunk tapping screws 601. Then, the interior wall board 7 is fixed to the other plate members 52A and the horizontal bar 82 of the ceiling suspension runner 8 with board fixing screws 701 that pass through the steel plate 6.

[0027] In the installation of the stair railing 2 using the above-described stair railing base structure 1, a bracket 21 supporting the stair railing 2 is placed on the indoor side of the interior wall board 7, and the bracket 21 is fixed to the indoor side of the interior wall board 7 by screwing the fixing screws of the bracket 21 into the steel plate 6 and the plate member 52 of the base member 5 from the interior wall board 7 side. When fixing the bracket 21 to the indoor side of the interior wall board 7, the interior wall board 7 is pushed towards the web 41 side of the steel frame girder 4, but the presence of the base member 5 prevents deformation of the interior wall board 7 by pressure.

[0028] The bracket 21 can be installed at any position within the arrangement range of the base member 5, at least along the extending direction of the steel frame girders 4 located in the inter-floor section 3. In a structure where plywood or the like is installed on the indoor end side of the steel frame girders 4 to serve as a handrail base, a problem may arise where the wall is thickened by the plywood or the like, making it impossible to secure the effective width of the stairs, but this problem will not occur.

[0029] Furthermore, since the steel plate 6 is fixed to the base member 5, other base members 5A, and ceiling suspension runner 8, and the board fixing screws 701 that fix the interior wall board 7 are also fastened to the steel plate 6, the resistance to peeling of the base member 5 inward when the base member 5 is adhesively fixed to the web 41 of the steel frame girder 4 can be shared and borne by the other base members 5A and ceiling suspension runner 8 via the steel plate 6. Also, with this configuration, the bracket 21 can be fixed at any position within the placement range of the steel plate 6. Since the steel plate 6 is fixed to the base member 5, other base members 5A, and ceiling suspension runner 8, the placement range of the steel plate 6 can be made to a wide range that exceeds the height range of the steel frame girder 4.

[0030] Furthermore, if the base member 5 comprises a batten (supporting member) 51 and a plate member 52 fixed to the batten 51, it becomes unnecessary to use large block-shaped timbers or the like as the base member 5, thus reducing the amount of materials and improving work efficiency. In addition, if the batten 51 is fixed to the steel frame girder 4 by adhesive, the ease of construction can be improved.

[0031] Furthermore, if the other base member 5A comprises another batten (another receiving member) 51A and another board member 52A fixed to this other batten 51A, it becomes possible to standardize the constituent materials of the other base member 5A and the base member 5.

[0032] In the above embodiment, the base member 5 is fixed to the web 41 of the steel frame girders 4 by adhesive, and a steel plate 6 is provided to prevent the base member 5 from peeling off the web 41 due to the adhesive. However, the embodiment is not limited to this configuration. For example, if the base member 5 is fixed to the web 41 of the steel frame girders 4 by strong adhesive, the steel plate 6 can be omitted. Similarly, the base member 5 may be fixed to the web 41 of the steel frame girders 4 with screws, and the steel plate 6 can also be omitted in such a structure. However, in order to enable the bracket 21 to be placed at any position within a wide range, the steel plate 6 may be provided even in a structure where the base member 5 is fixed to the web 41 of the steel frame girders 4 with strong adhesive or screws.

[0033] Furthermore, in the above embodiment, the base member 5 consists of battens 51 and board members 52, but instead of battens 51, short rectangular parallelepiped members may be placed at the locations where the countersunk screws 500 are to be driven. Also, metal square pipes or the like can be used instead of battens 51. The same applies to the other battens 51A.

[0034] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope. [Explanation of symbols]

[0035] 1: Stair handrail base structure 2: Staircase handrail 3: Inter-floor area 4: Steel frame girders 5: Substrate material 5A: Other base materials 6: Steel plate 7: Interior wall boards 8: Ceiling-mounted runners 9: Interior wall support base material 21: Bracket 41: Web 42: Upper flange 43: Lower flange 51: Wooden support (support member) 51A: Other battens (other support members) 52: Plate member 52A: Other plate members 81:Connection part 82: Horizontal bar 100: stairs 500: Countersunk head screws 501: Hardware 502: Countersunk head self-drilling screw 601: Countersunk head tapping screw 701: Board fixing screws 801: Drill screws

Claims

1. A stair railing base structure that serves as a fixing base for fixing brackets supporting stair railings to the interior wall of the inter-floor section, comprising an interior wall board that forms the interior wall, and a base member provided on the interior side of the web of the steel frame girders located in the inter-floor section, which supports the back side of the interior wall board. Above the steel frame girders mentioned above, other base members are positioned to support the back side of the interior wall boards mentioned above. A horizontal batten is fixed to the ceiling suspension runner located below the steel frame girder mentioned above, which supports the back side of the interior wall board. A staircase handrail base structure for an inter-floor section, characterized in that a steel plate positioned on the exterior side of the interior wall board is fixed to the base member, the other base members, and the horizontal bar of the ceiling suspension runner.

2. A stair railing base structure that serves as a fixing base for fixing a bracket supporting a stair railing to an indoor wall in the inter-floor section, comprising: an interior wall board that forms the indoor wall; and a base member provided on the indoor side of the web of a steel frame girder located in the inter-floor section, which receives the back side of the interior wall board. The above-mentioned base member is characterized by comprising a receiving member whose back surface is fixed to the web of the steel frame girder, and a plate member whose back surface is received by the indoor surface of the receiving member, and whose indoor surface is flush with the indoor end surface of the steel frame girder or positioned on the indoor side of the said end surface.

3. A stair railing base structure that serves as a fixing base for fixing a bracket supporting a stair railing to an indoor wall in the inter-floor section, comprising: an interior wall board that forms the indoor wall; and a base member provided on the indoor side of the web of a steel frame girder located in the inter-floor section, which receives the back side of the interior wall board. The above-mentioned base member comprises a receiving member whose back surface is fixed to the web of the steel frame girder, and a plate member whose back surface is received by the indoor surface of the receiving member, and whose indoor surface is flush with or located on the indoor side of the indoor end surface of the steel frame girder. Above the steel frame girders mentioned above, other base members are positioned to support the back side of the interior wall boards mentioned above. A horizontal batten is fixed to the ceiling suspension runner located below the steel frame girder mentioned above, which supports the back side of the interior wall board. A staircase handrail base structure for an inter-floor section, characterized in that a steel plate positioned on the exterior side of the interior wall board is fixed to the base member, the other base members, and the horizontal bar of the ceiling suspension runner.

4. The stair handrail base structure for an inter-floor section according to Claim 1 or Claim 3, wherein the other base member comprises: another receiving member fixed to a metal fitting positioned above the steel frame girder; and another plate member whose back surface is received by the indoor side surface of the other receiving member, and whose indoor side surface is flush with the indoor end surface of the steel frame girder or positioned on the indoor side of the said end surface.

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