JP2015132070A - Handrail fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handrail fitting structure capable of improving mountability of a metal handrail to a handrail bracket.SOLUTION: The handrail fitting structure includes: a cylindrical metal handrail 11 which has a concave groove part 14 which is formed on an outer peripheral surface of the handrail 11 extending in full length in a longitudinal direction; and a handrail bracket 20 for fixing the handrail thereon. The handrail fitting structure is arranged so that in a state where a projection 28 of a handrail fixing part 27 of the handrail bracket 20 is fitted, the handrail is attached and fixed to the handrail bracket with a screw 5. A front end 5a of the screw 5 is arranged to thread in both side walls 15 and 15 of the concave groove part so as not to come into contact with a bottom 16 of the concave groove part. The screw is screwed into a fixing part 18 constituting the bottom of the concave groove part being interposed by the handrail fixing part.

Description

  The present invention relates to a structure for attaching a handrail to a handrail bracket.

Conventionally, a structure in which a handrail is attached via a handrail bracket so as to be along an installation target surface such as a wall surface of a staircase or a corridor is known.
For example, in Patent Document 1 below, a handrail is attached by a fixing tool such as a screw in a state in which a positioning protrusion provided on a handrail bracket is fitted in a positioning recess provided on a handrail rod made of a single plate laminated material. A structure in which a bar is attached to a handrail bracket has been proposed.

JP 2007-85109 A

  In the case of the wooden handrail as described above, it is relatively easy to screw a screw in any part, and the handrail can be attached to the handrail bracket relatively easily. However, there are cases where it is desired to use a metal handrail instead of a wooden handrail from the standpoint of material procurement, etc., or from the viewpoint of making it long and more efficient. In such a case, it is difficult to screw the metal handrail into the metal handrail. For example, it may be necessary to provide a pilot hole or the like so as to be in a position corresponding to the handrail bracket at the construction site. Improvement is desired.

  This invention is made | formed in view of the said situation, and it aims at providing the handrail attachment structure which can improve the attachment property of the metal handrail to a handrail bracket.

  In order to achieve the above object, the handrail mounting structure according to the present invention is such that the handrail is fixed to a concave groove portion provided on the outer peripheral surface of the metal cylindrical handrail so as to extend in the longitudinal direction over the entire length. In a state where the convex portion provided on the handrail fixing portion of the handrail bracket is fitted, the both ends of the concave groove portion can be twisted off while the tip portion is not in contact with the groove bottom of the concave groove portion. A screw is screwed into a fastening portion constituting a groove bottom of the concave groove portion via the handrail fixing portion, and the handrail is attached to the handrail bracket.

In the present invention, the handrail may have a structure in which the thickness of the entire portion along the circumferential direction excluding the fastening portion is thinner than the fastening portion.
Moreover, in this invention, you may provide the receiving groove part which receives the front-end | tip part of the said screw in the groove bottom of the concave groove part of the said handrail over the full length.

  Since the handrail attachment structure according to the present invention is configured as described above, it is possible to improve the attachment of the metal handrail to the handrail bracket.

(A)-(c) is a partially broken schematic longitudinal cross-sectional view corresponding to part X in FIG. 2, and (a), (b) are handrail attachment structures according to an embodiment of the present invention. The figure which shows an example of the attachment procedure of an example of (1) typically, (c) is a figure which shows the same handrail attachment structure typically. It is a schematic longitudinal cross-sectional view which shows typically an example of the handrail attachment structure. (A) is a schematic perspective view which shows typically an example of the handrail bracket used for the handrail attachment structure, (b) is a partially broken schematic perspective view which shows typically an example of the handrail attachment structure.

Embodiments of the present invention will be described below with reference to the drawings.
1-3 is a figure which shows typically an example of the handrail attachment structure which concerns on this embodiment.
In some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
Moreover, in the following embodiment, directions, such as an up-down direction, are demonstrated on the basis of the state which attached the handrail to the handrail bracket fixed to the wall surface as an installation object surface.

  As shown in FIG. 1, the handrail mounting structure according to the present embodiment has a handrail fixing portion 27 of the handrail bracket 20 in a concave groove portion 14 provided on the outer peripheral surface of a metal cylindrical handrail 10 (handrail main body 11). It is set as the structure which attached the handrail 10 to the handrail bracket 20 in the state which inserted the convex part 28 provided in this. Further, the handrail mounting structure is configured such that the screw 5 is configured such that the side walls 15 and 15 of the concave groove portion 14 can be twisted off while the tip portion 5 a is not in contact with the groove bottom 16 of the concave groove portion 14. The handrail 10 is attached to the handrail bracket 20 by being screwed into the fastening portion 18 constituting the groove bottom 16 of the concave groove portion 14.

As shown in FIG. 3B, the handrail device 1 used in the handrail attachment structure according to the present embodiment includes a long handrail 10 and a handrail bracket 20 to which the handrail 10 is fixed. . The handrail includes screws 3 and 4 (see FIG. 2) as fasteners for fixing the handrail bracket 20 to the installation target surface, and screws 5 as stoppers for fixing the handrail 10 to the handrail bracket 20. You may make it grasp | ascertain as the apparatus 1. FIG.
As shown in FIG. 3B, the handrail 10 is placed on the installation target surface 2 via a plurality of handrail brackets 20 and 20 (two in the illustrated example) arranged at intervals in the longitudinal direction of the handrail 10. Fixed. In the illustrated example, the handrail 10 is configured to be attached to the wall surface 2 as the installation target surface via the handrail brackets 20 and 20 so that the longitudinal direction is along the walking direction. Moreover, in the example of a figure, the example which attached the handrail 10 to the wall surface 2 via the handrail brackets 20 and 20 so that a longitudinal direction may be followed to the walking direction made into the inclination direction according to the gradient of the staircase is shown.
Moreover, in the example of a figure, the example made into the structure which provided the end members 6 and 6 which cover the longitudinal direction both ends of the handrail 10 is shown. In the illustrated example, these end members 6 and 6 are shown as end brackets 6 and 6 fixed to the wall surface 2.

  The handrail bracket 20 has a wall (installation target side) fixing portion 21 fixed to the wall surface 2 as an installation target surface on one end side, and a handrail fixing portion 27 to which the handrail 10 is fixed on the other end side. It is said that. Further, the handrail bracket 20 is provided with a connecting portion 25 for connecting the wall fixing portion 21 and the handrail fixing portion 27, and a hollow portion is provided that opens the connecting portion 25 toward the diagonally lower side on the opposite wall surface side. It has a hollow shape. Further, the handrail bracket 20 is provided with a cover 26 that covers the opening of the connecting portion 25. The cover 26 is configured to be attached so as to be fitted into the opening of the connecting portion 25.

As shown in FIG. 2, the wall fixing portion 21 has a plate shape in which the thickness direction is along the direction orthogonal to the wall surface 2 (the normal direction of the wall surface 2, the direction orthogonal to the wall surface). It has a contact surface that is in contact with the facing wall surface 2.
The wall fixing portion 21 is provided with insertion holes 22 and 24 through which screws 3 and 4 for fixing the handrail bracket 20 to the wall surface 2 are inserted. In the illustrated example, an example in which a plurality of insertion holes 22 and 24 are provided is shown. These insertion holes 22 and 24 are provided in the wall fixing portion 21 so as to penetrate in the wall surface orthogonal direction. The insertion holes 22 and 24 are provided in the wall fixing portion 21 so that the screws 3 and 4 can be screwed in through the opening of the hollow portion of the handrail bracket 20.

As shown in FIG. 2, the handrail fixing portion 27 has a generally plate shape in which the thickness direction is substantially along the vertical direction (the direction of the handrail longitudinal direction and the direction perpendicular to the wall surface 2). 10 has an abutting surface to be abutted against 10. That is, the handrail fixing portion 27 and the wall fixing portion 21 are provided substantially orthogonally.
In this embodiment, the handrail 10 side portion of the handrail fixing portion 27 has a concave curved surface shape along the outer peripheral surface of the handrail 10 having a substantially cylindrical shape. Further, as shown in FIG. 3A, the handrail fixing portion 27 is substantially rectangular in a plan view (as viewed in the direction along the handrail longitudinal direction and the direction perpendicular to the wall surface 2). Further, in the illustrated example, an example is shown in which the four peripheral end portions of the handrail fixing portion 27 on the handrail 10 side are contact surfaces that are in contact with the outer peripheral surface of the handrail 10 and a concave portion is provided on the inner side. In addition, it is good also as a contact surface where the whole handrail 10 side site | part of the handrail fixing | fixed part 27 contact | abuts the outer peripheral surface of the handrail 10 without providing such a recessed part.

Further, a convex portion (positioning convex portion) 28 to be fitted into the concave groove portion 14 of the handrail 10 to be described later is a cylinder center (axial center) direction (handrail axial direction) of the handrail 10 from a handrail 10 side portion of the handrail fixing portion 27. It protrudes toward The convex portion 28 is provided at substantially the center of the handrail 10 side portion of the handrail fixing portion 27 when viewed from the front (as viewed in the direction along the handrail longitudinal direction). Further, the convex portion 28 functions as positioning along the circumferential direction of the handrail 10 with respect to the handrail bracket 20 by being fitted into the concave groove portion 14 of the handrail 10.
The convex portion 28 has a shape corresponding to the concave groove portion 14 having a substantially rectangular groove shape when viewed from the front, and an outer surface (both side surfaces and an upper surface) of the convex portion 28 is an inner surface (both side walls 15, 15 and the groove bottom 16) are in contact with or in close proximity to each other.

Moreover, in this embodiment, as shown to Fig.3 (a), the some convex part 28,28,28 is provided at intervals along the longitudinal direction of the handrail 10. As shown in FIG.
In the illustrated example, the convex portions 28 are respectively provided at the central portion of the handrail fixing portion 27 in the direction along the handrail longitudinal direction, and the vicinity of both end portions spaced from each other in the direction along the handrail longitudinal direction (equal spacing). , 28, 28 are shown. Further, in the illustrated example, these convex portions 28, 28, 28 are formed in a substantially rectangular shape when viewed in the direction along the protruding direction, and the four peripheral edges of the protruding direction front end portion (upper end portion) are chamfered (R chamfered shape). ).

Further, the handrail fixing portion 27 is provided with an insertion hole 29 through which the screw 5 for fixing the handrail 10 is inserted. The insertion hole 29 is provided in the handrail fixing portion 27 so as to penetrate in a direction along the handrail axial direction. Further, the insertion hole 29 is provided in the handrail fixing portion 27 so that the screw 5 can be screwed through the opening of the hollow portion of the handrail bracket 20.
Further, the insertion hole 29 is provided at the approximate center of the handrail fixing portion 27 when viewed from the front. That is, the insertion hole 29 is provided so as to substantially coincide with the convex portion 28 in the direction along the circumferential direction of the handrail 10, and is provided so as to align with the convex portion 28 along the longitudinal direction of the handrail 10. (See FIG. 3 (a)).
Further, the insertion hole 29 is provided so as to be adjacent to the convex portion 28. In the present embodiment, a plurality of insertion holes 29 and 29 (two in the illustrated example) are provided at intervals along the longitudinal direction of the handrail 10. The insertion holes 29 and 29 are provided between the convex portions 28 and 28 so as to be adjacent to them. That is, the insertion holes 29 and 29 are respectively provided so as to be adjacent to both sides in the direction along the longitudinal direction of the handrail 10 of the convex portion 28 at the center.

Further, the insertion holes 29 and 29 are round hole shapes corresponding to the shape of the main body portion (body portion) of the screw 5. The diameters of the insertion holes 29 and 29 are smaller than the diameter of the head of the screw 5 so that the screw 5 can be fastened. The diameters of these insertion holes 29 and 29 may be the same as the diameter (nominal diameter) of the main body portion of the screw 5, or may be slightly smaller or slightly larger.
Further, in the illustrated example, the surface of the handrail fixing portion 27 facing the hollow portion is substantially flat so that the screw 5 can be easily fastened, and the outer peripheral surface of the handrail 10 at a substantially center along the circumferential direction of the handrail 10 side portion. The surface is substantially parallel to a tangential plane that touches the surface. In addition, the bottom surface of the concave portion that opens to the handrail 10 side of the handrail fixing portion 27 is substantially parallel to the surface of the handrail fixing portion 27 that faces the hollow portion side.

In the present embodiment, an example in which a plurality of insertion holes 29, 29 are provided and a plurality of convex portions 28, 28, 28 are provided in the handrail fixing portion 27 is shown. Both or one may be single.
In addition, the handrail bracket 20 may be made of metal from the viewpoint of the attachment strength of the handrail 10, for example, may be formed by casting or the like.

The handrail 10 includes a metal handrail main body 11 having a long cylindrical shape. In the present embodiment, the handrail main body 11 has a substantially cylindrical shape. The handrail main body 11 may be made of metal such as aluminum, stainless steel, or steel.
The handrail main body 11 is configured such that both ends in the longitudinal direction are open and a hollow portion is provided over the entire length. The handrail main body 11 may be extruded in the longitudinal direction. According to this, the length dimension can be easily adjusted by cutting or the like.
Further, the diameter (outer diameter) of the handrail body 11 may be, for example, about 20 mm to 50 mm, and preferably about 30 mm to 40 mm from the viewpoint of ease of gripping.

Moreover, in this embodiment, as shown in FIG. 2, the attachment part 13 for attaching the end bracket 6 attached to the handrail main body 11 so that this longitudinal direction edge part may be covered is provided. The attachment portion 13 is provided on the handrail main body 11 so as to protrude from the inner peripheral surface of the handrail main body 11 toward the handrail axial direction. If it is set as the structure which provided such an attaching part 13, even when the handrail main body 11 is cut | disconnected by the appropriate length dimension etc., it can respond flexibly.
Moreover, in this embodiment, the example which provided the some attachment parts 13 and 13 in the inner peripheral surface of the handrail main body 11 at intervals along the circumferential direction is shown. In the example shown in the figure, the mounting portions 13 and 13 are provided in a side portion (upper portion shown in the drawing) different from the side where the fastening portion 18 described later is provided. Moreover, in the example of a figure, the example which provided these attaching parts 13 and 13 and the fixing | fixed part 18 in the internal peripheral surface of the handrail main body 11 at substantially equal intervals in the circumferential direction is shown.

Further, in the illustrated example, the attachment portions 13 and 13 are shown as fastening ring (hole) -like portions 13 and 13 which penetrate in the longitudinal direction and to which fasteners such as screws are fastened. Moreover, in the example of a figure, the fixed annular parts 13 and 13 are shown as the open ring shape opened toward a handrail axial direction. A fastener is fastened to the fastening annular portions 13 and 13 in the handrail longitudinal direction, and the end bracket 6 is attached to the longitudinal end of the handrail main body 11 (handrail 10).
Note that the end member 6 that covers the longitudinal end portion of the handrail body 11 (handrail 10) is not limited to the bracket shape fixed to the wall surface 2, and the longitudinal end portion of the handrail body 11 (handrail 10). It is good also as what was made into the cap shape made into the shape according to. Moreover, you may make it provide the positioning convex part fitted in the ditch | groove part 14 of the handrail main body 11 in the side which faces the handrail main body 11 of the end member 6. FIG. Further, such an end member 6 may not be provided depending on how the handrail 10 is disposed.

The recessed groove portion 14 is provided over the entire length so as to open toward the opposite axis side in a direction along the handrail axial direction and to extend in the longitudinal direction of the handrail. The concave groove portion 14 has a substantially rectangular groove shape, a groove bottom 16 facing the handrail bracket 20 side, and both side walls 15 provided in parallel to be orthogonal to the groove bottom 16 and facing each other, 15. In the example shown in the figure, the groove bottom side both corners and the groove opening side both edges of the concave groove portion 14 are chamfered (R chamfered shape).
The concave groove portion 14 corresponds to the screw 5 so that the opening side portions of the side walls 15 and 15 are twisted by the screw 5 before the tip portion 5a of the screw 5 contacts the groove bottom 16 of the concave groove portion 14. Is formed.

The concave groove portion 14 is formed to correspond to the screw 5 so that the screw 5 can be screwed into the fastening portion 18 with a relatively small torque so as to function as a pilot hole shape of the screw 5. May be. Further, the groove opening 14 of the both side walls 15, 15 is screwed to the screw 5 to function as a female screw, and the screw 5 is smoothly screwed to the fastening portion 18 with a relatively small torque. It may be formed appropriately corresponding to the screw 5 so that it can be inserted.
The groove width dimension (dimension between both side walls 15, 15) and the groove depth dimension of the concave groove portion 14 are such that the concave groove portion 14 functions as a pilot hole as described above and functions as a female screw. Alternatively, the dimensions may be appropriate according to the shape of the tip 5a, the nominal diameter (outer diameter of the main body), and the like. In the illustrated example, the groove width dimension of the recessed groove portion 14 is set to be larger than the groove depth dimension.

Moreover, in this embodiment, it is set as the structure which provided the receiving groove part 17 which receives the front-end | tip part 5a of the screw 5 in the groove bottom 16 of the concave groove part 14 of the handrail main body 11 over the full length.
As shown in FIG. 1A, the receiving groove portion 17 opens toward the opposite axis side in the direction along the handrail axial direction, and is provided at a substantially center of the groove bottom 16 of the groove portion 14 in the groove width direction. Yes. The groove width dimension and the groove depth dimension of the receiving groove portion 17 are smaller than the groove width dimension and the groove depth dimension of the concave groove portion 14 so that a part of the tip portion 5a of the screw 5 can be received. It is said that.
In the example shown in the figure, the receiving groove portion 17 has a substantially V-shaped groove shape, but may have a substantially U-shaped groove shape, a substantially rectangular groove shape, or the like.

The fastening portion 18 is provided over the entire length of the handrail body 11 and is formed so that the handrail 10 can be fixed to the handrail bracket 20 by the screw 5 that is fastened. In the present embodiment, the fastening portion 18 is provided so as to protrude toward the handrail axial direction from the handrail inner peripheral surfaces on both sides of the fastening portion 18 in the handrail circumferential direction (groove width direction). . Further, the center in the handrail circumferential direction of the fastening portion 18 and the center in the groove width direction of the concave groove portion 14 are substantially matched in the handrail circumferential direction.
Moreover, in the example of a figure, the fixing | fixed part 18 is shown in the substantially rectangular shape seeing in the handrail longitudinal direction. Further, in the illustrated example, an example in which a surface (an anti-groove bottom side surface) facing the handrail axis side of the fastening portion 18 is a substantially flat surface orthogonal to the screwing direction of the screw 5 is illustrated. That is, an example in which the anti-groove bottom side surface of the fastening portion 18 is a substantially flat surface that is substantially parallel to the surface facing the hollow portion side of the handrail fixing portion 27 is shown. Further, an example is shown in which both side surfaces in the handrail circumferential direction of the fastening portion 18 are orthogonal to the anti-groove bottom side surface of the fastening portion 18 and are parallel to each other.

  The thickness dimension (dimension along the handrail axis direction from the groove bottom 16 to the anti-groove bottom side surface) and the dimension along the handrail circumferential direction of the fastening portion 18 stably stop the screw 5. You may make it set suitably according to the screw 5 so that attachment is possible. In the illustrated example, the dimension along the circumferential direction of the portion corresponding to both circumferential portions of the recessed groove portion 14 of the fastening portion 18 (the circumferential direction from one side wall 15 of the recessed groove portion 14 to one side surface in the circumferential direction of the fastening portion 18 is illustrated. And the thickness dimension along the axial direction of the handrail of the fastening portion 18 are substantially the same. Further, the dimension along the circumferential direction of the part corresponding to both sides in the circumferential direction of the concave groove part 14 of the fixing part 18 and the thickness dimension along the handrail axis direction of the fixing part 18 are defined as the groove width dimension of the concave groove part 14. And an example with substantially the same dimensions.

Moreover, in this embodiment, as shown in FIG.1 and FIG.2, the thickness of the substantially whole site | part (most part) 12 along the circumferential direction except the fastening part 18 has stopped the handrail main body 11 (handrail 10). The structure is thinner than the landing portion 18. In the present embodiment, the thickness of the entire part (most part) 12 along the circumferential direction excluding the fastening part 18 and the attachment parts 13, 13 is made thinner than the fastening part 18. In addition, the thickness of the most part 12 is substantially uniform over the entire circumferential direction and the entire length.
The thickness of the most part 12 may be appropriately set from the viewpoint of reducing the weight of the handrail 10 or the strength, and may be set to about 1.5 mm to 3.5 mm, for example. It may be about 2.0 mm to 2.5 mm.

The screw 5 to be screwed into the fastening portion 18 of the handrail main body 11 (handrail 10) has a nominal diameter (outer diameter of the main body portion) larger than the groove width size of the concave groove portion 14 and the concave groove portion 14. The both side walls 15 and 15 can be twisted off. The nominal length of the screw 5 (the length of the main body) is a dimension that penetrates the fastening portion 18 in a state where the handrail 10 is fixed to the handrail bracket 20 by being fastened to the fastening portion 18. ing.
As shown in FIGS. 1B and 1C, the screw 5 is inserted into the insertion hole 29 of the handrail fixing portion 27 of the handrail bracket 20 and is screwed into the fastening portion 18 of the handrail main body 11 (handrail 10). As a result, the handrail body 11 (handrail 10) is fixed to the handrail bracket 20.

  The nominal diameter and the nominal length of the screw 5 are the groove width and groove depth of the concave groove portion 14, the thickness dimension of the fastening portion 18 along the handrail axis direction, the dimension along the handrail circumferential direction, and ease of screwing. It is good also as an appropriate dimension from such viewpoints. For example, the nominal diameter of the screw 5 may be about 1.2 to 2.0 times the groove width dimension of the recessed groove portion 14. Further, the nominal diameter of the screw 5 may be about 3/4 or less of the dimension along the handrail circumferential direction of the fastening portion 18. In this embodiment, the nominal diameter of the screw 5 is about 1.4 times the groove width dimension of the concave groove portion 14, and the nominal diameter of the screw 5 is 1 / dimension of the dimension along the handrail circumferential direction of the fastening portion 18. About 2. For example, as an example, the groove depth of the concave groove portion 14 is 2.0 mm, the groove width of the concave groove portion 14 is 2.8 mm, the dimension along the handrail circumferential direction of the fastening portion 18 is 8.0 mm, and the fastening portion 18 The thickness along the handrail axis direction may be 3.3 mm, the nominal diameter of the screw 5 may be 4.0 mm, and the nominal length may be about 16 mm.

  Further, the screw 5 may be a drilling screw or a tapping screw from the viewpoint of ease of screwing into the metal handrail main body 11, and the illustrated example illustrates a drilling screw having the tip portion 5a as a drill portion. ing. Further, in the illustrated example, the screw 5 is illustrated as an example of a round screw shape having a head facing the surface facing the hollow portion side of the handrail fixing portion 27. It is possible to employ screws 5 having various configurations.

Moreover, in this embodiment, as shown in FIG.1 and FIG.2, the handrail 10 is set as the structure which stuck the decorative sheet 19 on the outer peripheral surface of the handrail main body 11. As shown in FIG. Moreover, in this embodiment, it is set as the structure which stuck the single decorative sheet 19 in the circumferential direction of the handrail main body 11 so that the width direction both ends could be stored in the ditch | groove part 14. FIG. With such a configuration, the joint along the handrail circumferential direction of the decorative sheet 19 can be made inconspicuous, and the decorative sheet 19 becomes difficult to bend, and the appearance of the handrail 10 can be improved. In the example shown in the figure, both end portions in the width direction of the decorative sheet 19 are attached to both side walls 15, 15 of the recessed groove portion 14, and are further attached to overlap the groove bottom 16.
In addition, as this decorative sheet 19, it is good also as what was set as the thickness dimension of about 50 micrometers-1.0 mm, for example. The decorative sheet 19 may be, for example, a synthetic resin decorative sheet or a veneer sliced from a natural wood. Moreover, it is good also as the handrail 10 which applied the coating etc. to the outer peripheral surface of the handrail main body 11, and surface-treated, without sticking such a decorative sheet 19. FIG.

When the handrail 10 having the above-described configuration is fixed to the handrail bracket 20 using the screws 5, for example, the following method may be used.
First, the convex portion 28 of the handrail fixing portion 27 of the handrail bracket 20 is fitted into the concave groove portion 14 of the handrail 10, and the handrail 10 is positioned in the circumferential direction with respect to the handrail bracket 20.
Next, the screw 5 is screwed into the fastening portion 18 of the handrail 10 through the insertion hole 29 of the handrail fixing portion 27 of the handrail bracket 20 using an electric screwdriver or the like, so that the handrail 10 is fixed to the handrail bracket 20. It may be. At this time, at the initial stage of screwing, both side walls 15 and 15 of the concave groove portion 14 are not in contact with the groove bottom 16 of the concave groove portion 14 (in this embodiment, the inner surface of the receiving groove portion 17). Screwed off by the screw 5.
Moreover, you may make it attach the cover 26 to the handrail bracket 20 suitably.

Since the handrail attachment structure according to the present embodiment is configured as described above, the attachment property of the metal handrail 10 (handrail body 11) to the handrail bracket 20 can be improved.
That is, as described above, the convex portion provided on the handrail fixing portion 27 of the handrail bracket 20 to which the handrail 10 is fixed to the concave groove portion 14 provided over the entire length on the outer peripheral surface of the metal cylindrical handrail 10. The handrail 10 is attached to the handrail bracket 20 with the portion 28 fitted. Therefore, as described above, the handrail 10 can be attached in a state where the position along the circumferential direction of the handrail 10 is positioned with respect to the handrail bracket 20, and the attachment property of the handrail 10 to the handrail bracket 20 can be improved. it can.

  Further, the screw 5 is configured such that the side walls 15 and 15 of the recessed groove portion 14 can be twisted off in a state where the tip portion 5a is not in contact with the groove bottom 16 (in this embodiment, the inner surface of the receiving groove portion 17) of the recessed groove portion 14. The handrail 10 is attached to the handrail bracket 20 by being screwed into the fastening portion 18 constituting the groove bottom 16 of the concave groove portion 14 via the handrail fixing portion 27. Therefore, the screw 5 is relatively smooth in the screwing direction compared to a structure in which the screw tip is screwed in and attached to the groove bottom of the groove or the outer peripheral surface other than the groove. Can be screwed into. That is, as described above, the both side walls 15 and 15 of the concave groove portion 14 can be twisted before the tip portion 5a of the screw 5 contacts the groove bottom 16 of the concave groove portion 14, so that at the initial stage of screwing Has no contact resistance with the groove bottom 16 of the concave groove portion 14, and can be screwed with a relatively small torque. Moreover, the both side walls 15 and 15 of the recessed groove part 14 function like a female screw, and the screw 5 will be screwed in smoothly.

In particular, when a screw is screwed in using an electric screwdriver, if the screw is screwed in such a structure that the screw tip is in contact with the groove bottom of the groove or the outer peripheral surface other than the groove, In combination with being pushed in the direction, the rotational speed may decrease or stop due to the contact resistance on the tip side in the initial stage of screwing. In addition, it is conceivable that the torque of the electric screwdriver is relatively large, but if the torque is too large, the screw or the portion where the screw is fastened may be easily broken, that is, It is also conceivable that the fastening action by the screw may not function.
On the other hand, according to this embodiment, the concave groove portion 14 functions like a pilot hole, and the screw 5 can be screwed relatively smoothly with an appropriate torque. Thereby, for example, in order to make it easy to screw the screw 5, it is not necessary to provide a pilot hole or the like at a position corresponding to the handrail bracket 20 at the construction site, and the attachment property of the handrail 10 can be improved. . Further, the concave groove portion 14 of the handrail 10 for positioning along the circumferential direction with respect to the handrail bracket 20 can be made to function as a pilot hole, and the structure is simplified compared to the case where the concave groove portion 14 is separately provided. Can be achieved. Moreover, since the concave groove part 14 is provided over the full length of the handrail 10, it can be easily attached also when providing the handrail bracket 20 in multiple places at intervals along the longitudinal direction of the handrail 10.

  In the present embodiment, the handrail 10 (handrail main body 11) has a structure in which the thickness of the substantially entire portion (most portion) 12 along the circumferential direction excluding the fastening portion 18 is thinner than the fastening portion 18. Therefore, compared with the handrail 10 in which the thickness of the most part 12 is the same as the thickness of the fastening part 18 that is set to an appropriate thickness so that the screw 5 can be fastened, the weight can be reduced. The attachment property of the handrail 10 can be further improved. Instead of such a mode, the thickness of the most part 12 may be substantially the same as that of the fastening part 18 or may be thicker than the fastening part 18.

  Moreover, in this embodiment, it is set as the structure which provided the receiving groove part 17 which receives the front-end | tip part 5a of the screw 5 in the groove bottom 16 of the concave groove part 14 of the handrail 10 (handrail main body 11) over the full length. Therefore, as compared with the structure in which the receiving groove portion 17 is not provided, the distal end portion 5a of the screw 5 and the groove bottom 16 (receiving groove portion 17 of the recessed groove portion 14 when the both side walls 15, 15 of the recessed groove portion 14 are twisted off. A non-contact state with the inner surface) can be efficiently ensured, that is, the groove depth of the portion excluding the receiving groove portion 17 of the concave groove portion 14 can be efficiently reduced. Further, the receiving groove portion 17 makes it easier for the screw 5 to be screwed in, and the attachment property of the handrail 10 can be further improved. Such a receiving groove portion 17 may not be provided on the groove bottom 16 of the concave groove portion 14 of the handrail 10.

  In addition, in this embodiment, although the example which made the handrail 10 substantially cylindrical shape is shown, it is not restricted to such an aspect. For example, the handrail 10 may have a substantially elliptical cylinder shape or a substantially polygonal cylinder shape. In this case, the shape of the handrail fixing portion 27 of the handrail bracket 20 may be appropriately modified.

11 Handrail body (handrail)
12 Most parts (generally whole parts along the circumferential direction excluding the fastening part)
14 concave groove portion 15 side wall 16 groove bottom 17 receiving groove portion 18 fastening portion 20 handrail bracket 27 handrail fixing portion 28 convex portion 5 screw 5a tip portion

Claims (3)

  The convex part provided in the handrail fixing part of the handrail bracket to which the handrail is fixed is fitted into the concave groove part provided to extend in the longitudinal direction over the entire length on the outer peripheral surface of the metal cylindrical handrail. In this state, a screw that is configured to be capable of twisting off both side walls of the concave groove portion with the tip portion being in non-contact with the groove bottom of the concave groove portion, the groove bottom of the concave groove portion is moved through the handrail fixing portion. A handrail attachment structure, wherein the handrail is attached to the handrail bracket by being screwed into a fastening portion to be configured. In claim 1,
The handrail mounting structure is characterized in that the handrail has a structure in which the thickness of the entire portion along the circumferential direction excluding the fastening portion is thinner than that of the fastening portion. In claim 1 or 2,
A handrail mounting structure characterized in that a receiving groove portion for receiving the tip end portion of the screw is provided over the entire length at the groove bottom of the concave groove portion of the handrail.

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