JP2007126883A - Handrail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail which has high bending rigidity in a joining part of a base and a support. <P>SOLUTION: The handrail T is provided with the base 10 fixed to a supporting structure S, a support 20 erected on the base 10, a coping 30 supported by the support 20, and a male screw part 50 for joining which joins the base 10 and the support 20. The support 20 comprises an extruded material having a hollow part 21 formed over the whole length, and a through hole 23 with a round cross section is formed from a lower end surface to an upper end surface of a peripheral wall 22 which forms a hollow part 21. A screw part 50 of the male screw part for joining is screwed into the through hole 23 from the lower side of the base 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a handrail.

A handrail installed on a floor surface of a landing or a step board of a staircase is disclosed in Patent Document 1 and the like. The handrail disclosed in Patent Document 1 includes a base that is fixed to a tread plate that is a support structure, a column that is erected on the base, and a headboard that is supported by the column. The support column is composed of an extruded shape member having a hollow portion, and a screw hole is formed on the peripheral wall forming the hollow portion from the lower end surface to the upper end surface. Then, with the lower end surface of the support striking against the upper surface of the base, insert the threaded part of the male screw parts such as bolts and tapping screws into the insertion hole formed in the base from the lower side, and insert the male screw into the screw hole of the support The base and the support are joined by screwing the thread portion of the component.
JP 2004-162518 A (FIGS. 1 and 5)

  By the way, in the handrail of patent document 1, since a part of hole wall of a screw hole is lose | disconnected and it connects with a hollow part, arrangement | positioning of a screw hole is influenced by the shape etc. of a hollow part. Therefore, for example, if the peripheral wall is made thick to reduce the cross-sectional area of the hollow portion in order to increase the bending rigidity of the support column, adjacent screw holes are brought close to each other. However, when adjacent screw holes are brought close to each other, the resistance force against the moment acting on the lower end portion of the column cannot be increased. That is, in the handrail of Patent Document 1, even if the bending rigidity of the support is increased, the bending rigidity at the joint portion with the base may not be increased.

  From such a viewpoint, an object of the present invention is to provide a handrail having high bending rigidity at a joint portion between a base and a support.

  The present invention, which has been created to solve such problems, includes a base fixed to a support structure, a support column erected on the base, a headboard supported by the support column, the base and the support column. A handrail comprising a joining male screw part for joining the support post, wherein the support column is formed of an extruded shape member having a hollow portion formed over the entire length thereof, and the peripheral wall forming the hollow portion has a lower portion thereof. A through hole having a circular cross section is formed from the end surface to the upper end surface, and the thread portion of the male screw part for joining is screwed into the through hole from the lower side of the base.

  The support structure is a structure capable of supporting a load acting on a handrail, and is a general term for a flooring material, a beam material, a step board for a staircase, etc. in a landing hall or a passageway.

  According to the handrail according to the present invention, since the through hole formed in the support column is made independent from the hollow portion without communicating with the hollow portion, the arrangement of the through holes is hardly affected by the shape of the hollow portion. Therefore, for example, even if the peripheral wall is thickened and the cross-sectional area of the hollow portion is reduced in order to increase the bending rigidity of the support columns, it is not necessary to bring adjacent through holes (joining male screw parts) close to each other. The bending rigidity at the joint between the base and the column becomes high.

  The handrail according to the present invention may include a fixing male screw component for fixing the base to the support structure. In this case, it is preferable that the threaded portion of the fixing male screw component is screwed into the support structure in a state where it is inclined with respect to the vertical line. In this case, even if the thickness (girder height) of the support structure is smaller than the length of the screw portion of the fixing male screw component, the tip of the screw portion of the fixing male screw component is the support structure. It does not protrude from.

  In addition, if the insertion hole through which the threaded portion of the fixing male screw component is inserted in the base and that is inclined with respect to the vertical line is formed, the fixing male screw component can be easily and reliably formed. The screw portion can be screwed into the support structure in a state inclined with respect to the vertical line.

  When the base has an inclined surface that is inclined with respect to the contact surface with the support structure, the insertion hole is formed along a normal direction of the inclined surface, It is good to open to the said inclined surface. In this way, even when the threaded portion of the fixing male screw part is inclined, the entire seating surface of the head abuts against the inclined surface, so that the base is firmly fixed to the support structure. It becomes possible.

  It is desirable that the threaded portion of the fixing male screw component be inclined with respect to the vertical line in a vertical plane perpendicular to the vertical plane including the center line of the headboard. Such a handrail exhibits a high resistance to a force that pushes it down.

  The tip of the threaded portion of the fixing male screw component may be positioned directly below or just above the base. If it does in this way, even if it is a case where the width | variety of a support structure is narrower than a base, the fixing external thread component can be reliably fixed to a support structure.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the handrail with high bending rigidity in the junction part of a base and a support | pillar.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the following, the direction along the longitudinal direction of the headboard 30 is referred to as “front-rear direction”.

  As shown in FIG. 1, the handrail T according to the present embodiment includes a base 10 that is fixed to the support structure S, a support column 20 that is erected on the base 10, and a headboard 30 that is supported by the support column 20. And a panel 40 disposed between the adjacent struts 20, 20, and further, as shown in FIGS. 2A and 2B, a male screw component for joining that joins the base 10 and the strut 20. 50 and a fixing male screw part 60 for fixing the base 10 to the support structure S. The support structure S includes a beam member S1 and a spacer S2 placed on the upper surface of the beam member S1.

  The handrail T shown in FIG. 1 includes four bases 10, 10,..., Four struts 20, 20,. It is not intended to be limited, and may be changed according to the situation of the installation part.

  The base 10 is interposed between the support structure S and the support column 20, and as shown in FIG. 3, in this embodiment, a plate-shaped member made of aluminum alloy that has a rectangular shape (square) in plan view. Consists of. More specifically, the base 10 includes a contact surface 11 (see FIGS. 4A and 4B) that contacts the surface (upper surface) of the support structure S, and a mounting surface 12 on which the support column 20 is mounted. And inclined surfaces 13 and 13 inclined with respect to the contact surface 11. A plurality of through holes 14, 14,... Are formed in the center of the base 10, and a plurality of insertion holes 15, so as to surround the plurality of through holes 14, 14,. 15 is formed.

  In the present embodiment, the mounting surface 12 is formed at the center of the upper surface of the base 10 (a region surrounded by a dotted line in FIG. 3) and contacts the lower end surface of the support column 20. In the present embodiment, the placement surface 12 is formed horizontally and flatly.

  In the present embodiment, the inclined surfaces 13 are formed on the upper surface of the base 10 and on both the left and right sides of the mounting surface 12. The inclined surface 13 is inclined downward with a uniform gradient from the placement surface 12 side (center portion side) toward the side end portion (right end portion or left end portion).

  As shown in FIG. 4A, the through hole 14 is formed along the normal line (that is, the vertical line) of the mounting surface 12, and opens to the contact surface 11 and the mounting surface 12. ing. The joining male screw component 50 is inserted into the through hole 14. In addition, the diameter of the lower part of the through-hole 14 is expanded so that the head 51 of the male screw part 50 for joining can be accommodated.

  FIG. 4B is a diagram showing a cut surface when the base 10 is cut along a vertical plane P (see FIG. 1) perpendicular to the vertical plane including the center line of the headboard 30 (that is, ( FIG. 4B is a sectional view taken along line X5-X5). As shown in this figure, the insertion hole 15 is formed along the normal line n of the inclined surface 13, and is within the vertical plane P (that is, FIG. 4). (B) in the cross section) with respect to the vertical line. The threaded portion 62 of the fixing male screw component 60 is inserted into the insertion hole 15. The insertion hole 15 is open to the contact surface 11 and the inclined surface 13.

  In order to fix the base 10 to the support structure S, the screw portion 62 of the fixing male screw component 60 is inserted into the insertion hole 15 of the base 10 from above, and then the head 61 is moved with a tightening tool (not shown). The screw portion 62 may be screwed into the support structure S by rotating.

  The support | pillar 20 shown in FIG. 3 consists of an extruded shape member made from an aluminum alloy. A hollow portion 21 having a substantially rectangular cross section over the entire length is formed at the center of the cross section of the extruded shape member. The hollow portion 21 is formed along the extrusion direction of the extruded shape member, and its upper end and lower end are open.

  As shown in FIG. 5, the peripheral wall 22 forming the hollow portion 21 has a substantially rectangular cross section, and is disposed along the long side and the thick portion 22 a disposed on the short side. And a thin portion 22b. The thick part 22a is formed thicker than the thin part 22b. A through hole 23 and a notch 24 are formed on the peripheral wall 22 from the lower end surface to the upper end surface, and concave portions 25 are formed on the front and rear side surfaces of the peripheral wall 22. The hollow part 21, the through-hole 23, the notch 24, and the recessed part 25 are formed along the extrusion direction of the extruded profile, and are formed when extrusion molding is performed.

  The through hole 23 has a circular cross section and is independent of the hollow portion 21. The through hole 23 is formed at the end of the thick portion 22a. That is, the through hole 23 is formed at each of the four corners of the peripheral wall 22. As shown in FIG. 4A, the arrangement of the through holes 23, 23,... Corresponds to the arrangement of the through holes 14, 14,. When the column 20 is placed, the through hole 14 and the through hole 23 communicate with each other.

  The notch 24 shown in FIG. 5 has a substantially V-shaped cross section and communicates with the hollow portion 21. The notch 24 is formed at the center of the thick portion 22 a and faces the opposite notch 24 with the hollow portion 21 in between. The deepest part of the notch 24 is formed in a circular shape.

  The two concave portions 25, 25 are formed along the extrusion direction of the extruded shape member, and face each other with the hollow portion 21 interposed therebetween.

  In order to join the support column 20 to the base 10, the lower end surface of the support column 20 is brought into contact with the mounting surface 12 of the base 10 as shown in FIG. What is necessary is just to insert the screw part 52 of the male screw part 50 for joining, rotate the head 51 with a fastening tool (not shown), and screw the screw part 52 into the lower end part of the through hole 23. In addition, the support | pillar 20 is mounted in the mounting surface 12 of the base 10 so that the long side of the cross section may follow a left-right direction (refer FIG.2, (b)).

  As shown in FIG. 2A, the upper head 30 is disposed obliquely above the upper end of the support 20 and is supported by the support 20 via the upper bracket 31. As shown in FIG. 3, the upper bracket 31 includes a leg portion 31 a that is inserted into the hollow portion 21 of the support column 20 from above, and a blocking portion 31 b that closes the upper surface of the support column 20 when the leg portion 31 a is inserted into the hollow portion 21. A column portion 31c that rises obliquely upward from the upper surface of the closing portion 31b, and a receiving portion 31d that is formed on the top portion of the column portion 31c and contacts the lower surface of the upper head 30 (see FIG. 2A). It is configured with. In order to join the upper bracket 31 to the support column 20, the leg portion 31a is inserted into the hollow portion 21 of the support column 20, and then a tapping screw is inserted into the through hole formed in the closing portion 31b. What is necessary is just to screw in the circular part of FIG. Further, in order to join the upper bracket 31 to the headboard 30, the upper surface of the receiving portion 31 d is brought into contact with the lower surface of the headboard 30, and a tapping screw is inserted into the through hole formed in the receiving portion 31 d. Just screw it in.

  As shown in FIG. 2 (a), the lower berth 30 is disposed on the side of the intermediate portion in the vertical direction of the column 20 and is supported by the column 20 via the lower bracket 32. The lower bracket 32 is formed at a base portion 32a joined to the side surface of the support column 20, a branch portion 32b projecting obliquely upward from the side surface of the base portion 32a, and a tip portion of the branch portion 32b. The receiving part 32c which contacts is comprised. In order to join the lower bracket 32 to the support column 20, the base portion 32 a is brought into contact with the side surface of the support column 20, and then a tapping screw is inserted into the through hole formed in the base portion 32 a and screwed into the support column 20. In order to join the lower bracket 32 to the headboard 30, the upper surface of the receiving portion 32 c is brought into contact with the lower surface of the headboard 30, and a tapping screw is inserted into the through hole formed in the receiving portion 32 c. Just screw it in.

  The cap 30 is not limited to a wooden one, and may be made of metal (for example, aluminum alloy, stainless steel, etc.) or synthetic resin, or a plurality of members made of different materials may be used. It may be a combination.

  The panel 40 is a plate-like member formed of a light-transmitting material (for example, acrylic resin), and is supported by the column 20 via a panel bracket 41 as shown in FIG. The panel bracket 41 is formed at an engaging portion 41a having a convex portion that engages with the concave portion 25 of the support column 20, an overhanging portion 41b protruding from the side surface of the engaging portion 41a, and a distal end portion of the overhanging portion 41b. The holding portion 41c is in contact with one surface of the panel 40. In order to join the panel bracket 41 to the support column 20, the engaging portion 41 a is brought into contact with the side surface of the support column 20, and then a tapping screw is inserted into the through hole formed in the engaging portion 41 a, so that the peripheral wall 22 of the support column 20. You just screw in. Further, in order to hold the panel 40 by the panel bracket 41, the holding portion 41c is brought into contact with one surface of the panel 40, and then the male screw of the pressing member 42 disposed on the other surface side of the panel 40 is formed on the panel 40. What is necessary is just to insert in the through-hole which was made and to screw-engage with the internal thread formed in the holding | maintenance part 41c.

  In the present embodiment, the joining male screw component 50 shown in FIG. 3 is made of a stainless steel hexagon socket head cap screw. The threaded portion 52 of the joining male screw component 50 is screwed into the through hole 23 of the support column 20 from the lower side of the base 10 (see FIG. 4A). In order to prevent loosening of the male screw part 50 for joining, the through hole 14 of the base 10 is filled with a loosening preventive agent.

  In this embodiment, the fixing male screw component 60 is a stainless steel coach screw. As shown in FIG. 4 (b), the threaded portion 62 of the fixing male screw component 60 is inserted into the insertion hole 15 from the upper side of the base 10, and is screwed into the support structure S in an inclined state with respect to the vertical line. Is done. In this embodiment, the inclination angle is 10 °. In the present embodiment, the insertion hole 15 of the base 10 serving as a guide for the fixing male screw component 60 has a vertical line in the vertical plane P shown in FIG. 1 (that is, in the cross section of FIG. 4B). Therefore, the screw portion 62 of the fixing male screw part 60 is also inclined with respect to the vertical line in the vertical plane P, and further, the insertion hole 15 is formed in the direction along the normal line n of the inclined surface 13. At the same time, since the upper end is opened in the inclined surface 13, the entire seating surface of the head 61 abuts on the inclined surface 13 when the fixing male screw component 60 is tightened. Further, in the present embodiment, the insertion hole 15 of the base 10 is formed along the normal line n of the inclined surface 13 that is inclined downward toward the side end portion. The tip of 62 is located directly below the base 10. That is, in the present embodiment, the two fixing male screw parts 60, 60 arranged in the vertical plane P (see FIG. 1) are arranged in an inverted C shape.

  The cover 70 shown in FIG. 3 covers the base 10 and the head 61 of the fixing male screw part 60, and is made of a synthetic resin box-shaped member. An opening 71 for inserting the support column 20 is formed at the center of the upper surface of the cover 70.

  According to the handrail T according to the present embodiment described above, since the through hole 23 formed in the support column 20 is not communicated with the hollow portion 21 and is made independent from the hollow portion 21, the arrangement of the through holes 23 is the hollow portion 21. It becomes difficult to be influenced by the shape of Therefore, for example, even if the peripheral wall 22 is made thick and the cross-sectional area of the hollow portion 21 is reduced in order to increase the bending rigidity of the support column 20, the adjacent through holes 23, 23 (joining male screw parts 60, 60) are adjacent to each other. As a result, the bending rigidity at the joint portion between the base 10 and the support column 20 is high.

  In addition, since the screw portion 62 of the fixing male screw component 60 is inclined with respect to the vertical line, the thickness (girder height) of the support structure S is smaller than the length of the screw portion 62. The tip of the screw part 62 does not protrude from the support structure S. In other words, even when the thickness (girder height) of the support structure S is small, the fixing length of the fixing male screw component 60 (the length of the screw portion 62 screwed into the support structure S). Therefore, the pulling strength of the fixing male screw part 60 is increased, and consequently the bending strength of the handrail T is also increased. When the inclination angle of the fixing male screw part 60 is less than 5 °, the difference from the case where the fixing male screw part 60 is arranged vertically is reduced. When the inclination angle exceeds 20 °, the inclination to the support structure S is reduced. Since the screwing operation becomes difficult and the tips of the fixing male screw parts 60, 60 arranged in the vertical plane P (see FIG. 1) may contact and interfere with each other, the inclination angle of the fixing male screw part 60 Is preferably in the range of 5 ° to 20 ° with respect to the vertical line.

  Moreover, in the present embodiment, since the insertion hole 15 of the base 10 is inclined in a predetermined direction, the screw portion 62 of the fixing male screw component 60 is easily and reliably inclined with respect to the vertical line. It becomes possible to screw into the support structure S.

  Further, in the present embodiment, the insertion hole 15 of the base 10 is formed in the direction along the normal line n of the inclined surface 13 and the upper end thereof is opened in the inclined surface 13, so that the head of the fixing male screw component 60 The entire seating surface 61 contacts the inclined surface 13. That is, according to the handrail T according to the present embodiment, the base 10 can be firmly fixed to the support structure S without using a taper washer or the like.

  Further, since the screw portion 62 of the fixing male screw component 60 is inclined with respect to the vertical line in the vertical plane P (see FIG. 1) perpendicular to the vertical plane including the headboard 30, the handrail T is moved in the left-right direction. Demonstrates high resistance to pushing force. That is, when the handrail T is pushed down in the left-right direction, a vertically upward tensile force F acts on one of the two fixing male screw parts 60 in the vertical plane P. The fixing male screw part Since 60 is inclined, the tensile force F is distributed to the pulling force acting in the axial direction of the fixing male screw part 60 and the shearing force acting in the direction perpendicular to the axis. That is, when the fixing male screw component 60 is arranged in the vertical direction, the pulling force (force acting in the axial direction) acting on the fixing male screw component 60 is equal to the vertically upward tensile force F. When the fixing male screw component 60 is inclined at the inclination angle θ, the pulling force acting on the fixing male screw component 60 is a tensile force F × cos θ, which is smaller than that in the case where the fixing male screw component 60 is arranged in the vertical direction.

  Further, when the fixing male screw parts 60, 60 adjacent in the left-right direction are arranged in an inverted C shape, the tip of the screw part 62 is positioned immediately below the base 10, so that the width of the support structure S is the base 10. Even in a narrower case, the fixing male screw part 60 can be reliably fixed to the support structure S.

  Note that the configuration of the illustrated handrail T may be changed as appropriate. For example, in the above-described embodiment, the case where one support column 20 is erected on one base 10 is illustrated (see FIG. 1). However, the present invention is not limited to this, and illustration is omitted. Two or more struts 20 may be erected on 10. Moreover, in the above-described embodiment, the base 10 having a rectangular shape has been exemplified. However, the base 10 is not limited to this, and may have a polygonal shape, a circular shape, an elliptical shape, or the like. Similarly, in the above-described embodiment, the support column 20 having a rectangular cross section is illustrated, but the present invention is not limited to this, and the column 20 may have a polygonal cross section, a circular cross section, or an elliptical cross section.

  In the above-described embodiment, the case where the insertion hole 15 of the base 10 is formed in the direction along the normal line n of the inclined surface 13 inclined downward from the placement surface 12 side toward the side end portion is illustrated ( For example, when the support structure S is wider than the base 10 as shown in FIG. 7A, the side end portion is not limited to this. You may form in the direction in alignment with the normal line n of the inclined surface 13 which inclines upwards toward. If it does in this way, since the two fixing male screw parts 60 and 60 arrange | positioned in the vertical surface P (refer FIG. 1) will be arrange | positioned in C shape, compared with the length of the thread part 62. Even when the thickness (girder height) of the support structure S is small, the tip of the screw portion 62 does not protrude from the support structure S.

  In the above-described embodiment, the case where the mounting surface 12 and the inclined surface 13 of the base 10 are smoothly connected has been illustrated (see FIG. 3), but the present invention is not limited to this. As shown in b), the bottom surface of the concave portion 16 provided on the top surface of the base 10 may be used as the mounting surface. This facilitates positioning of the support column 20 and restricts rotation of the lower end portion of the support column 20 by the side wall of the recess 16, so that bending rigidity at the joint portion between the base 10 and the support column 20 is further increased. It will be even higher.

  In the above-described embodiment, the case where the inclined surface 13 of the base 10 is inclined with a uniform gradient is illustrated, but the present invention is not limited to this. For example, as illustrated in FIG. It does not matter even if it does. That is, a plurality (two in FIG. 8) of inclined surfaces 13 and 13 having different inclination angles may be formed on the upper surface of the base 10 and on both the left and right sides of the mounting surface 12. In FIG. 8, the slope at the side end (right end or left end) rather than the slope 13 on the placement surface 12 side (center side) (hereinafter referred to as “first slope 13 </ b> A”). The surface 13 (hereinafter referred to as “second inclined surface 13B”) is steeper. The insertion hole 15 is formed along the normal line of the first inclined surface 13A when opening the first inclined surface 13A, and the second insertion hole 15 when opening the second inclined surface 13B. It is good to form along the normal line of the inclined surface 13B. In this way, if a plurality of inclined surfaces 13A and 13B having different inclination angles are formed, the inclination angle of the insertion hole 15 (that is, the dimensions and the attachment strength of the support structure S, etc.) according to the attachment conditions of the column 20 (that is, the attachment structure 15). In the case of changing the inclination angle of the fixing male screw part 60, it is possible to easily cope with the change.

  In the above-described embodiment, the case where the base 10 is fixed to the upper surface of the support structure S is illustrated (see FIG. 2A). However, the present invention is not limited to this, and the illustration is omitted. The base may be fixed to the lower surface of the structure. In such a case, an inclined surface may be formed on the lower surface of the base, and the threaded portion of the fixing male screw component may be screwed into the support structure from the lower side of the base. In addition, if the screw part of the fixing male screw part is inclined with respect to the vertical line and the tip of the screw part is positioned immediately above the base, the support structure can be fixed even when the width of the support structure is narrower than the base. The male screw component can be securely fixed to the support structure.

  Moreover, in this embodiment, although the case where the handrail T was installed in the edge part of the landing was illustrated, it is not the meaning which limits the installation place of the handrail which concerns on this invention. Although illustration is omitted, the handrail according to the present invention can be applied to a veranda, a walkway, a staircase, and the like.

It is a perspective view which shows the handrail which concerns on this invention. (A) is sectional drawing which shows the handrail which concerns on this invention, (b) is sectional drawing in the X1-X1 line | wire shown to (a). It is a disassembled perspective view of the handrail which concerns on this invention. (A) is sectional drawing in the X4-X4 line | wire shown to (b) of FIG. 2, (b) is sectional drawing in a X5-X5 line | wire similarly. FIG. 3 is an end view taken along line X3-X3 shown in FIG. It is sectional drawing in the X2-X2 line | wire shown to (a) of FIG. (A) is sectional drawing which shows the modification of a base, (b) is sectional drawing which shows the other modification of a base. It is sectional drawing which shows another modification of a base.

Explanation of symbols

T handrail 10 base 11 contact surface 13 inclined surface 15 insertion hole 20 support column 21 hollow part 22 peripheral wall 23 through hole 30 coping 50 joint male screw part 60 fixing male screw part S support structure

Claims (6)

A handrail comprising a base fixed to a support structure, a support column erected on the base, a coping supported by the support column, and a male screw component for bonding the base and the support column. ,
The strut is made of an extruded profile in which a hollow portion is formed over its entire length,
In the peripheral wall forming the hollow portion, a through hole having a circular cross section is formed from the lower end surface to the upper end surface,
The handrail, wherein the threaded portion of the joining male screw part is screwed into the through hole from the lower side of the base. A fixing male screw component for fixing the base to the support structure;
The handrail according to claim 1, wherein a screw portion of the fixing male screw component is screwed into the support structure in a state inclined with respect to a vertical line.   The handrail according to claim 2, wherein an insertion hole that is inclined with respect to a vertical line is formed in the base, and a screw portion of the fixing male screw part is inserted into the insertion hole. The base has an inclined surface that is inclined with respect to a contact surface with the support structure;
The handrail according to claim 3, wherein the insertion hole is formed along a normal direction of the inclined surface, and is open to the contact surface and the inclined surface.   5. The threaded portion of the fixing male screw component is inclined with respect to the vertical line in a vertical plane perpendicular to a vertical plane including the center line of the headboard. The handrail according to any one of the above.   The handrail according to any one of claims 2 to 5, wherein a distal end of a screw portion of the fixing male screw component is positioned directly below or directly above the base.

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