JP2002327522A - Handrail folding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handrail folding device allowing the wide use of a passage such as a corridor or a stairway in carrying in and out furniture, a load or the like. SOLUTION: This handrail folding device is provided with a mounting frame fixed to a mounted face F such as a wall surface, and a support arm 10 supporting a handrail H installed along the passage R, and mounted to the mounting frame 20 rotatably around an axis O almost parallel with the installed direction of the handrail H. The support arm 10 is fixed to the mounting frame by a fixing mechanism in the state of the handrail H being displaced into a service position of projecting onto the passage R side and into a folded position close to the mounted face F. The support arm 10 and mounting frame 20 are respectively provided with abutting faces 12c, 24a abutting each other at least in the service position to impede the downward rotation of the handrail H around the axis O.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail folding device.

[0002]

2. Description of the Related Art Conventionally, handrails have been installed in corridors, stairs, and the like. The handrail is supported and fixed at the tip of a support arm fixed to a mounting surface such as a wall surface, and is mounted so as to protrude toward the passage.

[0003]

The installation of the handrail narrows the width of the passage, so that, for example, when moving, wide furniture, luggage, etc. may not be able to be carried in / out from the corridor or stairs.

[0004] It is an object of the present invention to provide a handrail folding device that can widely use a passage such as a corridor or a staircase even when carrying in or carrying out furniture or luggage.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, a handrail folding device according to the present invention is provided along a mounting frame fixed to a mounting surface such as a wall surface and a passage. A support arm that is connected to the handrail to be supported and that rotatably supports the handrail between a use position that protrudes toward the passage side and a folded position that is close to the mounting surface, and the support arm that is mounted on the mounting frame. And a fixing mechanism for fixing the position at least in the use position.

According to the present invention, by simply displacing the handrail from the use position to the folding position and fixing the support arm to the mounting frame by the fixing mechanism, the passage such as a corridor or a staircase is close to the original passage width. Because it can be used widely in a state, wide furniture,
Loading and unloading of luggage and the like becomes easier.

The supporting arm and the mounting frame are
At least a contact surface may be provided that abuts each other at least in the use position and prevents the handrail from rotating downward around the rotation axis of the support arm.

When the fixed state of the support arm and the mounting frame by the fixing mechanism is released in order to displace the handrail from the use position to the folding position, the support arm and the mounting frame come into contact with each other via the contact surface. Since the handrail and the support arm are in contact with each other, the handrail and the support arm do not rotate downward around the rotation axis of the support arm due to their own weight. In other words, the operation of releasing the fixed state between the support arm and the mounting frame by the fixing mechanism and the operation of displacing the handrail to the folding position and fixing the support arm and the mounting frame by the fixing mechanism can be separately performed, The positioning and fixing operation can be easily performed, and the handrail and the support arm are prevented from being unexpectedly rotated and dropped.
Therefore, even in the case of a long handrail supported by a plurality of support arms, the operation of displacing the handrail from the use position to the folding position by performing these operation procedures is one.
Can be done by people. When displacing the handrail from the folding position to the use position, the support arm and the mounting frame are brought into contact with each other with the handrail displaced to the use position, and then the support arm And the mounting frame can be fixed by the fixing mechanism.

In the above case, the fixing mechanism connects the support arm and the mounting frame so that the position can be fixed and the fixing frame can be released while the contact surfaces formed on the support arm and the mounting frame are in contact with each other at the use position. It is desirable to have. When the handrail is displaced from the use position to the folding position, while the contact surface between the support arm and the mounting frame is in contact with each other at the use position, the fixing state of the support arm and the mounting frame by the fixing mechanism is maintained. Since it can be released, it is possible to avoid the trouble and danger of lifting the support arm for releasing the fixation. Similarly, when displacing the handrail from the folding position to the use position, the support arm and the mounting frame are brought into contact with each other with the handrail displaced to the use position, and this state is maintained. The support arm and the mounting frame can be fixed by the fixing mechanism.

[0010]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a front view and a side view of a handrail folding device according to an embodiment of the present invention, and FIG. 2 is a side sectional view. As shown in FIG. 1, the handrail folding device includes a support arm 10 that supports a cylindrical handrail H installed along a passage R at one end, and a mounting arm that is fixed to a mounting surface F such as a wall surface. A frame 20 and a fixing mechanism (described later with reference to FIG. 6) for fixing the position of the other end of the support arm 10 to the mounting frame 20 are provided. The other end of the support arm 10 is attached to the attachment frame 20 so as to be rotatable around a fulcrum shaft 40 (rotation axis O) substantially parallel to the installation direction of the handrail H. The fixing mechanism fixes the position of the support arm 10 to the mounting frame 20 in a state of being displaced between the projecting use position and the folding position close to the mounting surface F.

In the following description of the embodiment, the side on which the handrail H is fixed and supported with respect to the support arm 10 is the upper end (upper side), and the side on which the mounting frame 20 is mounted is the lower end ( Lower side).

The support arm 10 and the mounting frame 20, which are the main parts of the handrail folding device according to the present invention, are generally manufactured by integral molding of metal, plastic, or the like. Here, referring to FIG. 4 and FIG.
0 and the structure of the mounting frame 20 will be outlined.

First, the support arm 10 shown in FIG.
It has a support portion 11 and a main body portion 12. The main body 12 has a taper that is narrower toward one end (upper end) when viewed from the front and side surfaces, and the support portion 11 connected to the upper end thereof.
Has a crescent-shaped or arc-shaped receiving surface 11a when viewed from the installation direction of the handrail H (the direction of the axis O; see FIG. 1), and a plurality (for example, two) of supporting surfaces are provided on the receiving surface 11a from the outer surface of the support portion 11. A part insertion hole 11b is provided.

On the other hand, a first shaft hole 12 a is formed in the other end side (lower end side) of the main body 12 substantially in parallel with the receiving surface 11 a of the support portion 11. A screw hole 12b is formed at the lower end of the main body 12 at a position further away from the first shaft hole 12a by a certain distance and substantially parallel to the first shaft hole 12a. The upper end surface of the main body 12 extending to the opposite side (the mounting surface F side; see FIG. 1) of the support portion 11 across the first shaft hole 12a has an arm side substantially parallel to the first shaft hole 12a. Contact surface 12c
Is formed.

The mounting frame 20 shown in FIG. 5 has a flat mounting portion 21 and two parallel side walls 22, 23 and a bulging portion 24 formed on one end face of the mounting portion 21. . The mounting portion 21 is formed with one or a plurality of (for example, four) mounting portion insertion holes 21a. The central portion of the mounting portion 21 surrounded by the side wall portions 22 and 23 and the bulging portion 24 is made thinner than the peripheral portion to form a concave portion 21b, and the rotation of the main body portion 12 of the support arm 10 is performed. The range can be made large (see FIG. 2).

2 stands almost upright from the mounting portion 21
The two parallel side walls 22 and 23 have second shaft holes 22 having the same axis as the first shaft holes 12 a of the support arm 10.
a and 23a are respectively formed. Also, one side (FIG. 5)
In the lower end portion of the side wall portion 22 (right side in the front view shown in (a)), an insertion hole 22b which forms a head fitting portion described later is provided at two positions separated from the second shaft hole 22a by a certain distance downward. , 2
2c are formed substantially parallel to the second shaft holes 22a. These insertion holes 22b and 22c are formed with the screw hole 12b of the support arm 10 and the second shaft hole 22a (the first shaft hole 1c).
The distance from 2a) is made common. Reference numeral 22d is an arc-shaped groove connecting the two insertion holes 22b and 22c. Further, the axis of one of the two insertion holes 22b and 22c is positioned on a vertical line lowered from the axis of the second shaft hole 22a or in the vicinity thereof so as to be inserted into the second shaft hole 22a. The distance from the mounting surface F of the hole 22c is set substantially equal. Thus, the width of the side wall portions 22 and 23 projecting toward the passage R is reduced while securing the rotation angle of the support arm 10 between the use position and the folding position.

Further, a bulging portion 24 is provided so as to stand substantially upright from the mounting portion 21 and to connect one end side (upper end side) of both side wall portions 22 and 23. And
Any surface (lower end surface in the embodiment) forming the rising wall of the bulging portion 24 is opposed to the arm-side contact surface 12c formed on the support arm 10 and has a specific condition described later. Thus, a frame-side contact surface 24a that contacts the arm-side contact surface 12c is formed.

Returning to FIG. 1, the support structure for the handrail will be described in detail. The handrail H is held by the receiving surface 11a of the support portion 11 of the support arm 10, and is fixed to the support portion 11 by a set screw 19 inserted into the support portion insertion hole 11b. The mounting frame 20 is provided with the mounting portion insertion hole 2 of the mounting portion 21.
It is fastened and fixed to the mounting surface F by a mounting screw 29 inserted in 1a.

At the lower end of the main body 12 of the support arm 10, the side walls 22, 23 of the mounting frame 20 are positioned so as to sandwich it from both sides, thereby forming a mounting bracket for supporting the support arm 10. . A first shaft hole 12a formed in the main body 12 of the support arm 10;
Shaft holes 22 formed in both side walls 22 and 23 of the
a and 23a, the fulcrum shaft 40 is inserted.
Is rotatably mounted around a rotation axis O substantially parallel to the installation direction of the handrail H.

Next, a fixing mechanism for positioning and fixing the support arm 10 to the mounting frame 20 will be described with reference to FIGS. The fixing mechanism according to the present embodiment includes a screw hole 12b (fixing hole) formed in the main body 12 of the support arm 10 (first member), and a male screw such as a small screw or a bolt screwed into the screw hole 12b. Member 31 (shaft fixing member)
And one side wall 22 of the mounting frame 20 (second member)
And a head fitting portion 22b, 22c formed at each end of the arc-shaped groove 22d.

The male screw member 31 has a head portion that penetrates through the side wall portion 22 of the mounting frame 20, is screwed into the screw hole 12b of the support arm 10, and has a tapered diameter connected to the shaft portion. The arc-shaped groove 22 d is formed in the side wall 22 of the mounting frame 20 so as to correspond to the rotation range of the support arm 10 between the use position of the handrail H and the folding position, and penetrates the male screw member 31. In this state, the male screw member 31 is allowed to move in an arc relative to the mounting frame 20 within the rotation range of the support arm 10. Further, the head fitting portion 22
The b and 22c are formed at both ends of the arc-shaped groove 22d so as to be fitted to the head corresponding to the outer shape of the head of the male screw member 31, respectively. Then, the head fitting portions 22b, 22c
Prevents the male screw member 31 from moving in an arc in which the male screw member 31 relatively moves into the arc-shaped groove 22d in the fitting state with the head of the male screw member 31 (FIG. 6 (a)). In a state where the male screw member 31 is screwed into the screw hole 12b of the support arm 10, the male screw member 31 allows the circular movement to relatively move into the circular groove 22d (FIG. 6B).

More specifically, the head fitting portions 22b, 2
2 c has a tapered inner surface corresponding to the head of the male screw member 31, and has an arc-shaped groove 22 formed in the mounting frame 20.
The width d is smaller than the large-diameter portions of the tapered head fitting portions 22b and 22c, and wider than the shaft portion of the external thread member 31. The arc-shaped groove 22d rotates the support arm 10. It is formed along an arc centered on the axis O.

The handrail H attached as described above is displaced and adjusted between the use position protruding toward the passage R side and the folding position close to the attachment surface F as follows. First, the case where the handrail H is at the use position will be described. In the use position, the arm-side contact surface 12 c formed on the main body 12 of the support arm 10 is in contact with the frame-side contact surface 24 a formed on the bulging portion 24 of the mounting frame 20. Thus, even when the male screw member 31 is loosened, the handrail H and the support arm 10 rotate downward (in a direction away from the mounting surface F and falling down to the passage R side) around the rotation axis O of the fulcrum shaft 40 by their own weight. (See FIG. 2).

In this state, the displacement of the handrail H to the folding position is adjusted as follows. The male screw member 31 is slightly loosened and its head is attached to the mounting frame 20 (side wall portion 22).
(See FIG. 6B). Male thread member 31 and support arm 10 (main body 12)
As the support arm 10 is turned from the use position to the folding position while maintaining the screwed state with the screw hole 12b,
The male screw member 31 is relatively moved along the arc-shaped groove 22d. Then, by screwing the male screw member 31 into the screw hole 12b of the support arm 10 at the folding position, the head of the male screw member 31 is attached to the head fitting portion 2 of the mounting frame 20.
2c, the support arm 10 is fixed to the mounting frame 20, and the handrail H is fixed at the folding position via the support arm 10 (see FIG. 3).

When the handrail H is rotated upward together with the support arm 10 (in a direction approaching the mounting surface F) and moved to the folding position, the center of gravity G of the handrail H (in the case of a cylindrical or cylindrical shape, the cross-section (Center) is shifted from the position of the axis O of the fulcrum shaft 40 toward the mounting surface F by the shift amount e (FIG. 3).
reference). As a result, the handrail H and the support arm 10 do not reversely rotate downward (in a direction away from the mounting surface F and fall to the side of the passage R), and substantially maintain the state of FIG.

In order to adjust the displacement of the handrail H to the use position, the procedure may be reversed. Even when the handrail H is moved to the use position, the arm-side contact surface 12c formed on the main body 12 of the support arm 10 is attached to the mounting frame 20.
The handrail H and the support arm 10 are prevented from pivoting around the pivot axis O downward.

As described above, the male screw member 31 of the fixing mechanism is used.
By detaching the head of the (shaft-shaped fixing member) from the head fitting portions 22b and 22c of the mounting frame 20, the support arm 10 can be rotated between the use position and the folding position, and can be easily mounted. The position of the handrail H can be adjusted by a simple operation. Therefore, even in the case of a long handrail H that is supported by the plurality of support arms 10, the mounting frame 20 of the support arm 10
It is also possible for one person to perform the work of fixing the position to the camera.

Moreover, in this embodiment, the head can be easily loosened by slightly loosening the male screw member 31 so that the head is fitted to the head fitting portions 22b, 22b.
c, and the position of the handrail H can be adjusted more easily. In this case, the use of the male screw member 31 enables the support arm 10 and the mounting frame 20 to be firmly connected to each other without looseness by screws. Less fearful.

Since the arm-side contact surface 12c is formed in the main body 12 on the mounting surface F side with respect to the first shaft hole 12a (the axis O) of the support arm 10, the arm-side contact surface 12c is formed.
c and the frame side contact surface 24a do not protrude toward the passage R side than the first shaft hole 12a (second shaft hole 22a), so that a small and compact handrail folding device can be obtained. The bulging portion 24 on which the frame-side contact surface 24a is formed is a pair of side wall portions 22 and 2.
3 is provided so as to connect them, so that the contact structure between the arm-side contact surface 12c and the frame-side contact surface 24a can be made robust.

The other side wall portion 23 of the mounting frame 20 is also provided with the same arc-shaped groove 22d formed on the side wall portion 22 and the same arc-shaped groove and head fitting portion as the head fitting portions 22b and 22c. It may be formed. In this case, the screw hole 12b
Is provided so as to penetrate the main body 12, and another screw member similar to the male screw member 31 can be screwed into the penetrating screw hole 12 b from the side wall 23 side. Therefore, the side wall 22 is inserted into the screw hole 12b of the main body 12.
The support arm 10 is positioned and fixed to the mounting frame 20 by a male screw member 31 screwed from the side and another male screw member screwed from the side wall 23 side, thereby providing a stronger fixing mechanism.

Next, FIG. 7 shows a modification of the fixing mechanism shown in FIG. In FIG. 7, a lock pin 31 '(shaft-shaped fixing member) having a head instead of the male screw member 31 of FIG.
0 (the body 22) is engaged with the engagement hole 12b '(fixing hole). Also, the arc-shaped groove 22d of the mounting frame 20
Head fitting portions 22 formed at both ends of (movement permitting portion)
b 'and 22c' (only 22b 'appears in FIG. 7) have convex portions that can be fitted into concave portions formed on the head of the lock pin 31'. As a result, the convex portion of the head fitting portion 22b 'prevents the lock pin 31' from moving in an arc in which the lock pin 31 'relatively moves into the arc-shaped groove 22d when the lock pin 31' is fitted in the recess. 7 (a)), in the fitting / removing state, the lock pin 31 ′ is engaged with the engagement hole 12b ′ of the mounting frame 20, and the lock pin 31 ′ relatively moves into the arc-shaped groove 22d. (FIG. 7B). Note that a convex portion may be provided on the lock pin 31 'and a concave portion may be provided on the head fitting portion 22b'.

Therefore, the head of the lock pin 31 ′ (shaft fixing member) is connected to the head fitting portion 22 of the mounting frame 20.
By separating from the b 'and 22c', the support arm 10 can be rotated between the use position and the folding position, and the position of the handrail H can be adjusted by a simple operation as in the above-described embodiment. Further, when the lock pin 31 'is used as the shaft-shaped fixing member, there is an advantage that the attaching / detaching operation can be performed quickly.

FIGS. 8 to 10 show modifications of the handrail folding device shown in FIGS. In FIG. 8, the supporting method when the supporting arm is rotatably mounted on the mounting frame is changed as follows. That is, the lower end of the main body 112 of the support arm 110 (second member) is constituted by forked mounting brackets 112R and 112L, and the mounting brackets 112R and 112L are attached to the mounting frame 120.
The (first member) is located so as to sandwich the central projecting portion 125 from both sides.

In this embodiment, the support arm 11
The head fitting portions 112f, 11 corresponding to the use position and the folding position are provided at both ends of an arc-shaped groove 112h (movable allowance portion) formed in the main body portion 112 (the right bracket 112R).
2g, and the central protrusion 125 of the mounting frame 120.
The screw member 31 is screwed into the screw hole 125b (fixing hole) formed in the above.

The male screw member 31 passes through one of the mounting brackets 112R of the support arm 110, and
It has a head portion that is screwed into the 20 screw holes 125b and that has a tapered diameter and is connected to the shaft portion. In addition, the arc-shaped groove 112h
Is a support arm 1 between the use position and the folding position of the handrail H.
10 is formed on the mounting bracket 112R of the support arm 110 so as to correspond to the rotation range of the support arm 110, and in a state where the male screw member 31 is penetrated, the male screw member 31 Permits relatively circular movement. Further, the head fitting portions 112f, 112
g is formed at both ends of the arc-shaped groove 112h so as to fit with the head of the male screw member 31 corresponding to the outer shape of the head. And the head fitting portions 112f, 112g are
When the male screw member 31 is fitted to the head, the male screw member 31
Prevents the circular movement which relatively moves into the arc-shaped groove 112h. In the fitting and disengaged state, the male screw member 31 is screwed into the screw hole 125b of the mounting frame 120, and the male screw member 31 An arc movement that relatively moves into the groove 112h is allowed.

More specifically, the head fitting portion 112f,
112g has a tapered inner surface corresponding to the head of the male screw member 31, and an arc-shaped groove 112h formed in the support arm 110 has a tapered head fitting portion 112f, 1.
The width is smaller than the large diameter portion of 12 g and wider than the shaft portion of the male screw member 31, and the arc-shaped groove 112 h is formed along an arc around the rotation axis O of the support arm 10. .

Also in this embodiment, the head of the external thread member 31 (axial fixing member) of the fixing mechanism is detached from the head fitting portions 112f and 112g of the support arm 110, so that the support arm 10 is used at the use position. And the folding position, and the position of the handrail H can be adjusted.

The arm-side contact surface 112i is in contact with the frame-side contact surface 121c formed on the mounting portion 121 of the mounting frame 120 on the mounting surface F side of the shaft holes 112Ra and 112La.

FIG. 11 shows another modification of the fixing mechanism shown in FIG. This fixing mechanism has a groove (slit) opened on the outer surface, and a columnar (for example, columnar) or cylindrical (for example, cylindrical) fixing pin inserted into the groove as a shaft-like member. Specifically, two grooves 12d and 12e formed corresponding to the use position and the folding position are opened on the outer surface of the lower end portion of the main body 12 of the support arm 10. On the other hand, grooves 22e and 23e are opened at substantially the same position in side view on the outer surfaces of the lower ends of both side walls 22 and 23 of the mounting frame 20. As shown in FIG. 6A, the groove 1 of the support arm 10
2e is aligned with the grooves 22e, 23e of the mounting frame 20, and these grooves 12e, 22e, 2
When inserted through 3e, the handrail H is fixed at the use position. Similarly, grooves 12d, 22e, and 23e are
, The handrail H is fixed at the folding position.
In this case, the fixing pin 32 may be inserted not only in a groove (slit) opened on the outer surface but also in an insertion hole having a circular cross section.

As described above, when the fixing pin 32 is used for the fixing mechanism, there is an advantage that the attaching / detaching operation can be performed quickly. In addition, by the combination with the groove (slit) opened on the outer surface, the attaching / detaching operation can be performed more quickly.

In each of the modified examples shown in FIGS.
1 are denoted by the same reference numerals, and detailed description will be omitted.

Although the male screw member 31 and the lock pin 31 'have been described as examples of the shaft-shaped fixing member, a wedge, a key or the like may be used in addition to these.

Further, as the fixing mechanism, in addition to the shaft member described above, various known mechanisms such as a tightening mechanism using a clamp or the like and an elastic mechanism using an elastic action such as a spring may be used. Good.

For example, when the present invention is applied to a long handrail, a plurality of handrail folding devices according to the present invention may be provided along the longitudinal direction of the handrail.

[Brief description of the drawings]

FIG. 1 is a front view and a side view showing an example of a handrail folding device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a side view when the handrail is displaced to a folding position in FIG.

FIG. 4 is a front half sectional view and a side view of a support arm.

FIG. 5 is a front view and a side view of the mounting frame.

FIG. 6 is a sectional view taken along line BB of FIG. 1 (b).

FIG. 7 is a sectional view showing a modification of FIG. 6;

FIG. 8 is a front view and a side view showing a modification of FIG. 1;

FIG. 9 is a sectional view taken along the line CC of FIG.

FIG. 10 is a side view when the handrail is displaced to the folding position in FIG. 8B.

11 is a side view and an exploded side view showing another modified example of the fixing mechanism of FIG.

[Explanation of symbols]

 Reference Signs List 10 Support arm (first member) 20 Mounting frame (second member) 110 Support arm (second member) 120 Mounting frame (first member) 12b, 125b Screw hole (fixing hole) 12c, 112i Arm-side contact surface 22b, 22c, 112f, 112g Head fitting part 22d, 112h Arc-shaped groove (movable part) 24a, 21c Frame side contact surface 31 Male screw member (shaft fixing member) 31 'Lock pin (shaft fixing member) ) H Handrail F Mounting surface R Passage O Rotation axis

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masashi Shiba 1-119 Nokuta, Komaki City, Aichi Prefecture (72) Inventor Hiroshi Sakurada 3-9-1 Iwazuka Motodori, Nakamura-ku, Nagoya City, Aichi Prefecture F term (reference) 2E101 FF01 GG00 HH03 HH15 JJ05 JJ21

Claims (6)

[Claims] 1. A mounting frame which is fixed to a mounting surface such as a wall surface, and a handrail which is connected along a passage, is connected to a handrail, and the handrail is protruded toward a passage side and a folding position close to the mounting surface. A folding device for a handrail, comprising: a support arm that rotatably supports between a tatami position and a fixing mechanism that fixes the position of the support arm with respect to the mounting frame at least in the use position. . 2. The support arm and the mounting frame abut each other at least in the use position,
2. The handrail folding device according to claim 1, further comprising a contact surface that prevents the handrail from rotating downward around the rotation axis of the support arm. 3. 3. The arm-side contact surface formed on the support arm such that the contact surface is located closer to the mounting surface than the rotation axis of the support arm in the use position. The folding device for a handrail according to claim 2, comprising a frame-side contact surface formed on the mounting frame so as to face the arm-side contact surface. 4. The fixing mechanism includes: a fixing hole formed in one of the support arm and the mounting frame (hereinafter, referred to as a first member); and a fixing hole formed in the support arm and the mounting frame. A shaft-shaped fixing member with a head that penetrates the other (hereinafter, referred to as a second member) and engages with the fixing hole of the first member; The second member is formed to correspond to a rotation range of the support arm,
A movement permitting portion that permits the shaft-shaped fixing member to move in an arc relative to the second member within a rotation range of the support arm in a state where the shaft-shaped fixing member is penetrated; Are formed at both ends of the shaft-shaped fixing member so as to fit with the head corresponding to the outer shape of the head,
In the fitting state with the head, the shaft-shaped fixing member prevents an arc movement relatively moving into the movement permitting portion, and in the fitting-removed state, the shaft-shaped fixing member is fixed to the fixing hole of the first member. And a head fitting portion for allowing the shaft-shaped fixing member to relatively move into the movement permitting portion in an arcuate manner, wherein the head of the shaft-shaped fixing member is connected to the second member. The support arm between the use position and the folding position while detaching from the head fitting portion and maintaining the engagement state of the shaft-shaped fixing member and the fixing hole of the first member. As you rotate,
By relatively moving the shaft-shaped fixing member in the movement permitting portion, and fitting the head of the shaft-shaped fixing member to the head fitting portion of the second member at the use position or the folding position. The folding device for a handrail according to any one of claims 1 to 3, wherein the first member is fixed to the second member, and the handrail is fixed to the use position or the folding position via the support arm. 5. The fixing member formed on the first member, wherein the shaft-shaped fixing member is a male screw member with a head, and has a head connected to a shaft portion with a tapered diameter. The hole is a screw hole into which the external thread member is screwed, and the head fitting portion is formed so as to have a tapered inner surface corresponding to the head of the external thread member. The movement permitting portion formed in the member is configured by an arc-shaped groove having a width smaller than the large diameter portion of the tapered head fitting portion and wider than the shaft portion of the male screw member. Is formed along an arc about the axis of rotation of the support arm, loosens the male screw member to separate its head from the head fitting portion of the second member, and While maintaining the screwed state of the member and the screw hole of the first member, the support arm is moved to the use position. Along with rotating between the folding position, the male screw member is relatively moved along the arc-shaped groove, and the male screw member is moved to the first member at the use position or the folding position. By screwing into the screw holes, the head of the male screw member is fitted to the head fitting portion of the second member, and the first member is fixed to the second member. The folding device for a handrail according to claim 4, wherein the handrail is fixed at the use position or the folding position by using a handrail. 6. The support arm and the mounting frame, wherein the center of gravity of the handrail is displaced toward the mounting surface from the position of the rotation axis of the support arm at the folding position. The handrail folding device according to any one of claims 1 to 5, wherein a position is fixed by a fixing mechanism.