JP2024153970A - handrail - Google Patents

Abstract

To provide handrails with good workability.SOLUTION: A handrail according to an embodiment of the present invention comprises: support pillars 1, 1, ..., lower chord members 2, and lower chord member connecting metal fittings 3. The support pillar 1 has panel attachment grooves 4 in the longitudinal direction on the left and right sides, the lower chord member 2 is installed between the support pillars 1, 1 and supports the lower edge of a panel 5, and the lower chord member connecting metal fitting 3 is a block-shaped member formed from an extruded profile, which is arranged with the extrusion direction aligned with the longitudinal direction of the lower chord member 2, having a main body 6 that fits into the panel attachment groove 4 of the support pillar 1 at its tip and a mounting portion 7 that is formed wider in the projection direction than the main body 6 and positioned outside of the panel attachment groove 4. Through bolts 8 pass through the main bodies 6 of the left and right lower chord member connecting metal fittings 3, 3 and the support pillar 1 to fix them. Longitudinal ends of the lower chord member 2 are placed and fixed on the mounting portion 7 of the lower chord member connecting metal fitting 3.SELECTED DRAWING: Figure 1

Description

The present invention relates to handrails installed on balconies of apartment buildings, etc.

Conventionally, handrails have been known in which a coping and a soffit are erected on posts set at a specified interval, and a panel of glass or the like is attached to an opening surrounded by the posts, coping, and soffit. There is a demand for handrails of this type that are easy to install.

In light of the above-mentioned circumstances, the present invention aims to provide a handrail that is easy to install.

In order to achieve the above object, the handrail according to the invention described in claim 1 comprises a support, a lower chord, and a lower chord connecting fitting, the support has a panel mounting groove on the left and right side in the longitudinal direction, the lower chord is installed between the support and supports the lower edge of the panel, the lower chord connecting fitting is a block-shaped member formed of an extruded shape, and is arranged with the extrusion direction along the longitudinal direction of the lower chord, has a main body part whose tip fits into the panel mounting groove of the support, and a mounting part that is formed wider in the projection direction than the main body part and is located outside the panel mounting groove, and is fixed with a through bolt that passes through the support and the main body part of the left and right lower chord connecting fittings, and the longitudinal end of the lower chord is fixed by placing it on the mounting part of the lower chord connecting fitting.

The handrail according to the invention described in claim 1 comprises a support, a lower chord, and a lower chord connector. The support has a panel mounting groove on the left and right side in the longitudinal direction. The lower chord is installed between the support and supports the lower edge of the panel. The lower chord connector is a block-shaped member formed of an extruded shape and arranged with the extrusion direction along the longitudinal direction of the lower chord. The lower chord connector comprises a main body portion whose tip fits into the panel mounting groove of the support, and a supporting member portion which is formed wider in the projection direction than the main body portion and is positioned outside the panel mounting groove. The lower chord connecting fittings have a mounting part and are fixed to the main body parts of the left and right lower chord connecting fittings with a through bolt that passes through the pillars.The longitudinal ends of the lower chords are placed on and fixed to the mounting parts of the lower chord connecting fittings, so that the main body part can be fitted into the panel mounting groove of the pillar and the lower chord connecting fittings can be easily attached to both the left and right sides of the pillar with a single through bolt.The lower chords can then be easily installed between the pillars by placing the longitudinal ends of the lower chords on the mounting parts of the lower chord connecting fittings and fixing them, making it easy to install.
In addition, the rotation of the lower chord connecting fitting is regulated by the panel mounting groove of the support, the lower chord connecting fitting itself is less likely to twist, and the mounting part of the lower chord connecting fitting prevents twisting of the lower chord, so that the lower chord can be prevented from rotating or twisting in strong winds.

This is a cross-sectional view taken along line AA in FIG. This is a front view from the outside showing one embodiment of the handrail of the present invention. FIG. 3 is an enlarged front view showing the vicinity of the support column in FIG. 2 . This is a cross-sectional view taken along line B-B of FIG. An exploded oblique view showing the connection between the support and the lower chord. (a) is a plan view of the lower chord connecting fitting, (b) is a side view of the same, and (c) is a front view of the same.

The following describes an embodiment of the present invention with reference to the drawings. Figures 1 to 5 show one embodiment of the handrail of the present invention. This handrail is a fall prevention handrail installed on the balcony of an apartment building or other collective housing. As shown in Figures 1 and 2, multiple pillars 1, 1, ... are erected at intervals in the left-right direction on a parapet 9 that rises from the floor at the outdoor end of the balcony. A coping 10 is installed at the upper end of the pillars 1, 1, ..., and a bottom chord 2 is installed between the lower parts of adjacent pillars 1, 1, respectively. A panel 5 made of laminated glass is attached to each opening surrounded by the pillars 1, 1, ..., the coping 10, and the bottom chord 2. The pillars 1, the coping 10, and the bottom chord 2 are formed from extruded aluminum alloy members.

As shown in Fig. 4, the support 1 has a hollow, substantially square exterior shape, and has a panel mounting groove 4 along the longitudinal direction at the center of the left and right side surfaces in the projection direction. The side edge of the panel 5 is fitted into the panel mounting groove 4, and the side edge of the panel 5 is held in the panel mounting groove 4 by a pre-attached bead 11 attached to the inner surface on the outer side of the panel mounting groove 4, and a backup material 12 and a wet sealant 13 provided between the inner surface on the inner side of the panel mounting groove 4 and the panel 5. The panel mounting groove 4 has steps 14 formed on the inner surfaces on the outer and inner sides, and the groove width on the bottom side is one step narrower than the entrance side.
As shown in Figures 1, 3 and 4, the column 1 is reinforced by a reinforcing member 15 provided inside. The reinforcing member 15 is provided from the lower end to the middle part of the column 1, and an anchor bolt 16 is fixed to the lower part. The anchor bolt 16 is inserted into a hole opened in the parapet 9 and fixed, so that the column 1 stands upright from the parapet 9. The column 1 and the reinforcing member 15 are fixed inside with a screw 17 (see Figure 3). As shown in Figure 5, the reinforcing member 15 has an insertion hole 18 formed in the vertical direction as a long hole for a through bolt 8 for mounting the lower chord connecting metal part 3 described later. In addition, the column 1 has a circular hole (not shown) for the through bolt 8 formed in the bottom wall of the panel mounting groove 4 on the left and right side surfaces.

As shown in Figures 1 and 3, the coping 10 is composed of two members, a base material 19 and a cover material 20. The base material 19 is placed across the upper ends of adjacent posts 1, 1 and is attached by fixing it to the posts 1 from above with screws 21 (see Figure 3). As shown in Figure 1, the base material 19 has a panel mounting groove 4 on its underside, into which the upper edge of the panel 5 is inserted, and similarly to the post 1, the upper edge of the panel 5 is fixed to the panel mounting groove 4 by a pre-attached bead 11 provided on the outside and a backup material 12 and a sealant 13 provided on the inside.
The cover material 20 is attached by fitting it from above into the base materials 19, 19, ... so as to span the multiple base materials 19, 19, ... attached to every two adjacent pillars 1, 1 as described above (see Figure 1), and covers the base materials 19, 19, ....

As shown in Figure 1, the lower chord 2 has a U-shaped cross-section 22 that is open on the bottom, and a panel support 23 provided on the U-shaped cross-section 22. The panel support 23 has opposing exterior side walls 24a and interior side walls 24b, and the interior side walls 24b are removable ledges. The exterior side walls 24a and interior side walls 24b have inclined portions 25 on their lower sides that are inclined toward the exterior and interior, respectively. The provision of the inclined portions 25 makes it difficult to put one's foot on the lower chord 2.
The lower edge of the panel 5 is engaged in the panel support part 23, and is held in the panel support part 23 by a pre-attached bead 11 attached to the inside surface of the exterior side wall 24a, and a backup material 12 and a wet sealant 13 provided between the inside surface of the interior side wall 24b and the panel 5. In addition, a plurality of setting blocks 26 are provided within the panel support part 23 at intervals in the longitudinal direction of the lower chord 2, and the panel 5 is placed on the setting blocks 26.

As shown in Figures 1, 3 and 4, the lower chord 2 has its longitudinal ends connected to the columns 1 by lower chord connecting fittings 3. As shown in Figures 5 and 6, the lower chord connecting fittings 3 are block-shaped members formed from extruded aluminum alloy profiles, and are arranged with the extrusion direction aligned with the longitudinal direction of the lower chord 2. The lower chord connecting fittings 3 have a roughly square bar-shaped main body 6 and a plate-shaped mounting portion 7 formed on the upper surface side of the main body 6 and wider in the prospective direction than the main body 6, on which the lower chord 2 is placed.
As shown in Fig. 4, the main body 6 is adapted to fit into the panel mounting groove 4 of the support 1, and the end face on the support 1 side is engaged with the step 14 of the panel mounting groove 4. As shown in Fig. 5, the main body 6 is formed with a bolt insertion portion 27, through which the through bolt 8 is inserted, in the shape of a groove that is open at the bottom.
The mounting portion 7 is cut out on the side facing the support 1 and is positioned outside the panel mounting groove 4 so that the main body portion 6 can be fitted into the panel mounting groove 4 of the support 1 .
As shown in FIG. 5, the lower chord connecting fitting 3 has female screw holes 28 formed at intervals in the left-right direction on the upper surface opposite the support 1.

4 and 5, the lower chord connectors 3 are arranged by fitting their main bodies 6 into the panel mounting grooves 4, 4 on the left and right sides of the column 1, and one through-bolt 8 is passed through the left and right lower chord connectors 3, 3 and the column 1 (including the reinforcing member 15) from either the left or right side, and a nut 29 is screwed onto the threaded portion of the through-bolt 8 protruding from the lower chord connector 3 on the other side and tightened, thereby firmly fixing the left and right lower chord connectors 3, 3 to the column 1 with rotation restricted. Since the bolt insertion holes 18 of the reinforcing member 15 provided inside the column 1 are elongated holes in the vertical direction, even if there is an unevenness in the parapet 9 and there is an error in the installation height of the reinforcing members 15 of the multiple columns 1, 1, ..., the error can be absorbed by the elongated holes and the lower chord connectors 3 can be installed at the same height position of the multiple columns 1, 1, ....
1, the longitudinal end of the U-shaped cross-section portion 22 of the lower chord 2 is placed from above on the mounting portion 7 of the lower chord connecting fitting 3, and a screw 30 inserted from above is threaded into a female screw hole 28 formed in the lower chord connecting fitting 3 to fix the lower chord 2. Since the mounting portion 7 is formed wider in the prospective direction than the main body portion 6, the longitudinal end of the lower chord 2 can be stably held by the lower chord connecting fitting 3, and twisting of the lower chord 2 can be prevented.

Next, the construction procedure of this handrail will be described. This handrail is assembled in advance at the factory without the panel 5, and the handrail (handrail unit) without the panel 5 is transported to the construction site where the handrail is to be installed. When assembling the handrail unit, as described above, the main body 6 is fitted into the panel mounting groove 4 of the support 1, and the lower chord connecting metal fittings 3, 3 can be easily attached to both the left and right sides of the support 1 with a single through bolt 8, and then the longitudinal end of the lower chord 2 is placed on the mounting part 7 of the lower chord connecting metal fitting 3 and fixed with a screw 30, so that the lower chord 2 can be easily attached between the supports 1, 1, ..., which makes construction easy.
At the construction site, the positions of the supports and anchor bolts are marked out on the parapet 9, and holes are drilled at the anchor bolt positions.
Next, place the handrail unit on the parapet 9, and at the uneven portion where the parapet 9 is lowered, pull the reinforcing member 15 down from the support 1 to adjust it, and then fix the support 1 and the reinforcing member 15 with the screw 17 from the inside of the room. At this point, the through bolt 8 for fixing the lower chord connector 3 passes through the support 1 and the reinforcing member 15, but because the bolt insertion hole 18 of the reinforcing member 15 is a vertically long hole, the position of the reinforcing member 15 can be adjusted up and down in this way to absorb the unevenness.
Next, adhesive is injected into the holes in the parapet 9, and then the anchor bolts 16 protruding downward from the reinforcing members 15 of each of the posts 1, 1, ... of the handrail unit are inserted into the holes in the parapet 9.
After that, the position and height of the handrail unit are adjusted, and the handrail unit is temporarily fixed using a temporary fixing jig. After a predetermined period of time has passed, the temporary fixing jig is removed, and a cover 31 (see Figures 1 and 3) is attached to the base of the post 1.
Next, the panels 5 are attached between the pillars 1, 1, .... To attach the panels 5, with the inner side walls (edges) 24b of the panel support parts 23 of the lower chord 2 removed, the left and right side edges of the panel 5 are inserted from the inside into the panel attachment grooves 4 of the adjacent pillars 1, 1 with left and right bending, and then the panel 5 is lifted slightly to insert the upper edge of the panel 5 into the panel attachment groove 4 of the coping 10, and a setting block 26 is installed on the lower chord 2 to receive the panel 5.
Thereafter, the inner side wall (edge) 24b of the panel support portion 23 of the lower chord 2 is attached, and the backup material 12 and sealing material 13 are loaded onto the peripheral portion of the panel 5 from the inside side to fix the panel 5.

As described above, this handrail comprises pillars 1, 1, ..., a lower chord 2, and a lower chord connecting fitting 3, with the pillar 1 having a panel mounting groove 4 on the left and right side surfaces in the longitudinal direction, the lower chord 2 being installed between the pillars 1, 1 and supporting the lower edge of the panel 5, and the lower chord connecting fitting 3 being a block-shaped member formed from an extruded profile and arranged with the extrusion direction along the longitudinal direction of the lower chord 2, with a main body 6 whose tip fits into the panel mounting groove 4 of the pillar 1, and a mounting portion 7 which is formed wider in the projection direction than the main body 6 and is positioned outside the panel mounting groove 4. The lower chord connecting fittings 3, 3 on the left and right sides are fixed to the main body 6 thereof with a through bolt 8 that passes through the pillar 1, and the longitudinal end of the lower chord 2 is placed on and fixed to the mounting portion 7 of the lower chord connecting fitting 3, so that the lower chord connecting fittings 3, 3 can be easily attached to both the left and right sides of the pillar 1 with a single through bolt 8 by fitting the main body 6 into the panel mounting groove 4 of the pillar 1, and then, by placing and fixing the longitudinal end of the lower chord 2 on the mounting portion 7 of the lower chord connecting fitting 3, the lower chord 2 can be easily attached between the pillars 1, 1, ..., which makes it easy to install.
In addition, the rotation of the lower chord connecting fitting 3 is regulated by the panel mounting groove 4 of the support 1, the lower chord connecting fitting 3 itself is less likely to twist, and the mounting portion 7 of the lower chord connecting fitting 3 prevents twisting of the lower chord 2, so that the lower chord 2 can be prevented from rotating or twisting in strong winds.
Because heavy loads are repeatedly placed on the joints between the lower chord 2 and the pillars 1 of handrails like this due to wind pressure on the panel 5, it is preferable to perform regular maintenance on these joints to prevent them from loosening. However, this maintenance can be easily performed on this handrail by tightening the through bolts 8 and nuts 29.
In this handrail, the support pillar 1 has a panel mounting groove 4 provided at approximately the center of the projection direction on the left and right sides, so that the projection dimension of the entire handrail can be made small.
In this handrail, the lower chord connecting fitting 3 is fitted into the panel mounting groove 4 of the support 1, so there is no need to provide a separate groove in the support 1 to regulate the rotation of the lower chord connecting fitting 3, allowing the projected dimensions of the support 1 to be reduced and the cross-sectional shape of the support 1 to be simplified.

The present invention is not limited to the above-described embodiments. The cross-sectional shapes of the pillars and lower chords can be changed as appropriate. The shape and material of the lower chord connecting fittings can be changed as appropriate. The panels are not limited to being made of glass, but may be made of resin or metal, etc. The present invention is not limited to balcony handrails, and can be applied to any handrail, such as handrails on the roof of a building or on a pedestrian bridge.

Reference Signs List 1 Column 2 Lower chord 3 Lower chord connecting metal fitting 4 Panel mounting groove 5 Panel 6 Main body 7 Mounting part 8 Through bolt

Claims (1)

A handrail comprising a support pillar, a lower chord, and a lower chord connecting fitting, the support pillar having a panel mounting groove on the left and right side surfaces in the longitudinal direction, the lower chord being installed between the support pillars and supporting the lower edge of the panel, the lower chord connecting fitting being a block-shaped member formed from an extruded shape member, the extrusion direction being oriented along the longitudinal direction of the lower chord, the handrail having a main body portion whose tip fits into the panel mounting groove of the support pillar, and a mounting portion formed wider in the projection direction than the main body portion and positioned outside the panel mounting groove, the handrail being fixed with a through bolt that passes through the support pillar and the main body portion of the lower chord connecting fittings on the left and right sides, and the longitudinal end of the lower chord being fixed by being placed on the mounting portion of the lower chord connecting fitting.

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