JP3713679B2 - Torque adjusting device and handle device using torque adjusting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for adjusting torsion torque of a device using a torsion spring and a handle device provided with the torque adjusting device.
[0002]
[Prior art]
Conventionally, as a method for adjusting the torque of a device using the torsion torque of a torsion spring, as disclosed in JP-A-2-150525, the first hollow cylinder and the second hollow cylinder face each other. Spline grooves parallel to the axial direction are formed at equal pitches on the entire circumference of the surface, and the second hollow cylinder is inserted along the direction of the grooves, and the torque is adjusted by fitting them together at a desired position. It has been known.
[0003]
Further, as an example applied to other uses, one using a concavo-convex mechanism composed of spline grooves is known as JP-A-63-235751.
[0004]
Japanese Patent Application Laid-Open No. 10-183929, for example, is attached to a wall surface of a bathroom, a toilet, a hallway, etc. in a house, and is used for assisting sitting, standing up and walking of elderly people, sick people, and disabled people. A movable handle device using a torsion spring is disclosed, but a method of adjusting the biasing force of a push spring that presses and biases a cam member instead of adjusting the torque of the torsion spring is disclosed.
[0005]
[Problems to be solved by the invention]
However, the conventional device for adjusting the torque of the torsion spring using the spline moves the second hollow cylinder along the direction of the groove until the engagement of the concavo-convex structure formed with the spline groove is released. Rotate to the spline position where optimal torque is likely to be obtained. Then insert again and check the torque. Since these operations are repeated until a position where a desired torque can be obtained is found, the adjustment operation is troublesome and complicated. Further, in order to adjust at a fine angle, the pitch of the splines formed in the first and second hollow cylinders must be narrowed. As a result, since the crests of the spline are small and thin, the strength is lowered, and there is a problem that there is a limit in forming a spline with a narrow pitch. Further, since spline grooves having fine pitches are formed on the entire circumference, they are expensive.
[0006]
Further, in a movable handle device using a torsion spring, the operability of the handrail is adjusted by changing the biasing force of the push spring that presses and biases the cam member, instead of adjusting the torque of the torsion spring. For this reason, when adjusting the direction in which the urging force is increased, the surface pressure of the cam sliding surface increases. As a result, the frictional force on the cam sliding surface also increases, which may increase the operating force when operating the handrail.
[0007]
The present invention solves the conventional problems as described above, and it is possible to easily adjust the torque of the torsion spring and to adjust the torque of the torsion spring that can be finely adjusted at a fine angle without forming a fine pitch. An object is to provide an apparatus.
[0008]
In addition, since the torque is adjusted by adjusting the torsion amount of the torsion spring without adjusting the urging force of the push spring that presses and urges the cam member, a handle device that does not affect the operating force of the handrail is provided. For the purpose.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a torque adjusting device according to the invention of claim 1 is a device for adjusting the torque of a torsion spring hung between a mating member and a plurality of engagements at a predetermined pitch angle. The first piece member having a stop portion provided on the circumference, and a plurality of engaging portions shifted in phase with the engaging portion of the first piece member are opposed to the engaging portion of the first piece member. A second piece member disposed to face the first piece member so as to be relatively rotatable with respect to the first piece member, an engaging portion of the first piece member, and a second piece member A fixing member that engages with the locking portion and fixes the relative rotation of both members, and one end of the torsion spring is locked to either the first piece member or the second piece member, The other end of the spring is locked to the mating member .
[0010]
The invention according to claim 2 is the torque adjusting device according to claim 1, wherein the first piece member is externally mounted on the second piece member so as to be relatively rotatable.
[0011]
The invention according to claim 3 is the torque adjusting device according to claim 1, wherein the first piece member and the second piece member are arranged in contact with each other in the length direction so as to be relatively rotatable. To do.
[0012]
According to a fourth aspect of the present invention, there is provided a movable handle device that rotationally biases the handrail by a torsion spring, wherein the first piece member is provided with a plurality of engaging portions on the circumference at a predetermined pitch angle; A plurality of locking portions whose phases are shifted from the locking portions of the first piece member are provided on a surface facing the locking portion of the first piece member, and the first piece member is rotatable relative to the first piece member. Engage with the second piece member arranged to face the piece member, the locking portion of the first piece member and the locking portion of the second piece member, and fix the relative rotation of both members. A torsion spring is engaged with either the first piece member or the second piece member, and the other end of the torsion spring is indirectly or directly connected to the handrail. It is characterized by.
[0013]
A fifth aspect of the present invention is the handle apparatus according to the fourth aspect, characterized in that it has a cam mechanism in which the frictional resistance changes in accordance with the magnitude of the elevation angle that changes as the handrail rotates.
[0014]
The invention according to claim 6 is a handle device in which a handrail is attached to a cylindrical member rotatably supported by a bracket on a fixed side, and a cam mechanism and a torque adjusting device are arranged inside the cylindrical member. The cam mechanism has a cam member that rotates along with the rotation of the handrail and a slide member that presses against the cam surface of the cam member by a spring, and follows the magnitude of the elevation angle that changes as the handrail rotates. The torque adjusting device includes a first piece member in which a plurality of engaging portions are provided on the circumference at a predetermined pitch angle, and an engaging portion of the first piece member. And a plurality of locking portions whose phases are shifted from each other are provided on the surface facing the locking portion of the first piece member, and are disposed so as to face the first piece member so as to be rotatable relative to the first piece member. A second piece member, a locking portion of the first piece member, and a locking portion of the second piece member One end is locked to the fixed member that engages and fixes the relative rotation of both members, and either the first piece member or the second piece member, and the other end is locked to the cam member. It comprises a torsion spring that stores torque that biases the handrail in the opposite direction as the slide rotates.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 are a front view and a side view showing an example of use of a movable handle device that rotationally biases a handrail by a torsion spring provided with the torque adjusting device of this embodiment. 2 shows a state in which the handrail is stood up and stored, and FIG. 3 shows a use state in which the handrail is rotated to the horizontal position.
[0016]
Reference numeral 1 denotes a bracket made of a U-shaped plate fixed to a wall surface 400 such as a toilet of a house by a bolt 500. A handrail 100 is attached to an attachment portion 2a of a cylindrical member 2 supported rotatably with respect to the bracket 1. Is attached. The handrail 100 is supported by the bracket 1 so as to be rotatable between a vertical storage state and a parallel use state. A stopper rod 300 is attached to the handrail 100. When the handrail 100 is in the horizontal position, the stopper rod 300 is in contact with the mounting piece 1d on the wall surface side of the bracket 1 to support the horizontal state of the handrail 100.
[0017]
The handrail 100 is used for assisting the sitting, standing and walking of the elderly, the sick and the handicapped, etc., so it has a light force to move from the storage state to the use state and from the use state to the storage state. It needs to be able to operate. Normally, the stowed position is designed to maintain an upright state even if some vibrations are applied, and in the vicinity of the use position, it is designed so that it can be lowered gently to the use position even if the operation of lowering the handrail is stopped halfway. There are many cases.
[0018]
The mechanism part of the movable handrail will be described with reference to FIGS. 4 is a cross-sectional view showing a cross section taken along line AA of FIG. 3, and FIG. 5 is a developed perspective view. A pair of support pieces 1 a formed on the bracket 1 is provided with a single shaft 3 extending horizontally and fixed at both ends by bolts 4. Further, fixing plates 5 are fixed to both ends of the shaft 3 by C-shaped retaining rings 50 so as to support the outer periphery of the shaft 3.
[0019]
A non-circular hole 5a having a parallel cut portion is formed in the fixed plate 5, and the rotation is restricted by fitting with the same non-circular surface 3b formed at both ends of the inserted shaft 3. It is like that. Further, a claw 5b that is engaged with the support piece 1a of the bracket 1 and fixed to the bracket 1 is formed.
[0020]
Reference numeral 6 denotes a cam member that rotates in synchronization with the cylindrical member 2 as the handrail 100 rotates, and has a through hole 6a through which the shaft 3 is rotatably inserted. The cam member 6 is formed with a protrusion 6b, and is fixed to and integrated with the cylindrical member 2 by engaging with the notch 2b of the cylindrical member 2. And the front-end | tip part 6c of the cam member 6 becomes a cam shape. This cam shape design makes it possible to achieve torque characteristics that approximate the rotational moment characteristics of the handrail.
[0021]
The slide member 8 has a head portion 8 a that slides in contact with the distal end portion 6 c of the cam member 6, and an elongated hole 8 b into which the pin 9 inserted into the hole 3 a of the shaft 3 is inserted. As a result, the slide member 8 is restrained with respect to the shaft 3 in the rotational direction, and can slide within the range of the long hole 8b in the length direction. The slide member 8 is pressed and urged against the cam member 6 by a spring 10.
[0022]
A cam mechanism is formed by the cam member 6 and the slide member 8. The cam mechanism is designed so that the frictional resistance of the cam member 6 and the slide member 8 changes in accordance with the magnitude of the elevation angle that changes as the handrail 100 rotates.
[0023]
Reference numeral 13 denotes a movable piece on which a locking portion 131 composed of a plurality of slits having a constant pitch angle is formed. An adjustment recess 13 d is formed on the outer surface of the movable piece 13. The movable piece 13 can be rotated by fitting the tip of a jig (not shown) into the adjustment recess 13d and rotating the jig.
[0024]
Reference numeral 11 denotes an adjustment piece 11 fixed to the shaft 3 by a pin 12, and a movable piece 13 is externally rotatably mounted. Then, three engaging portions 11a, 11b, and 11c including three slits are formed on the outer peripheral portion at a pitch angle different from the pitch angle of the engaging portion 131 on the opposing surface of the engaging portion 131 formed on the movable piece 13. Has been.
[0025]
Reference numeral 14 denotes a fixing member made of an adjustment piece inserted at a position where the engaging portion 131 of the movable piece 13 and the engaging portion 11a, 11b or 11c of the adjusting piece 11 coincide with each other, and is inserted between both members. As a result, the mutual turning is impossible and the adjustment piece 11 and the movable piece 13 are integrated.
[0026]
As described above, the torque adjusting device of this embodiment is formed on each of the two piece members including the adjustment piece 11 that is the second piece member and the movable piece 13 that is the first piece member, and the piece member. After positioning using the phase difference of the locking portion, the fixing member 14 locks and fixes the both. Hereinafter, the fixing member 14 is described as the adjustment piece 14.
[0027]
The torsion spring 7 is provided in the movable piece 13 in which one hook 7 a is inserted into the hole 6 d of the cam member 6 that rotates in synchronization with the movement of the handrail, and the other hook 7 b is externally mounted on the adjustment piece 11. Since it is inserted into the hole 13a, the handrail 100 is biased so as to rotate upward.
[0028]
When the handrail 4 is rotated from the housed state (stand-up state) toward the use state (horizontal state), the movable handle device configured as described above also rotates the cam member 6 fixed to the cylindrical member 2. The torsion spring 7 locked to the first or second piece member fixed at one end to the cam member 6 and fixed at the other end integrally with the fixed shaft 3 is twisted and repelled. Is stored. This repulsive force acts as a force that biases upward so that the handrail 4 does not drop suddenly when the handrail 4 is rotated between the use state and the storage state.
[0029]
On the other hand, since the head 8a of the slide member 8 is pressed against the cam surface 6c of the cam member 6 by the spring 10, when the cam member 6 rotates, a frictional resistance is generated between the cam surface 6c and the head 8a. Arise. This frictional resistance is designed so that the cam mechanism changes following the magnitude of the elevation angle that changes as the handrail rotates, so that it can be freely adjusted by changing the shape of the cam surface 6c. it can.
[0030]
Therefore, even if the torque characteristic of the torsion spring 7 is a linear characteristic, it is possible to approximate the rotational moment characteristic of the handrail by changing the shape of the cam surface 6c, and the movable handle with improved operability. A device is obtained.
[0031]
Next, the torque adjustment mechanism of this embodiment will be described based on FIGS. 6-9 is sectional drawing which shows the BB cross section of FIG.
[0032]
In the present embodiment, since the adjustment piece 11 as the second piece member is fixed to the shaft 3, the torque of the torsion spring 7 is adjusted by rotating the movable piece 13 as the first piece member. The case will be described in which the angle adjustment is performed by 5 °.
[0033]
The movable piece 13 is formed with slits 131 serving as locking portions at equal intervals every 15 °, and the adjustment piece 11 has slits 11a, 11b, and 11c formed on the opposing outer surface.
[0034]
FIG. 6 shows a state in which the slit 11 a coincides with the slit 131 of the movable piece 13 and the adjustment piece 14 is inserted. The remaining slits 11b and 11c formed in the adjustment piece 11 in this state are formed with a 5 ° and 10 ° phase shift with respect to the slit 13a of the movable piece 13, respectively. Therefore, even if the pitch of the locking portions 131 of the movable piece 13 is 15 °, the angle can be adjusted by 5 °.
[0035]
When changing the torque of the torsion spring 7 in a stronger direction, the adjustment piece 14 is extracted, the jig described above is fitted into the adjustment recess 13d, and the movable piece 13 is wound around the torsion spring via the jig ( It is adjusted by inserting the adjustment piece 14 after confirming that the operability of the handrail is good and turning in the direction of arrow A in FIG.
[0036]
In the present embodiment, the positions of the slits of the adjustment piece 11 and the movable piece 13 are shifted by 5 °, so that the torque can be changed by an angle of 5 °.
[0037]
FIG. 7 shows a state in which the movable piece 13 is rotated by 5 ° in the direction of arrow A in FIG. 6 and the second slit 11 b of the adjustment piece 11 coincides with the slit 13 a of the movable piece 13.
[0038]
FIG. 8 shows a state in which the third slit 11c of the adjusting piece 11 has been matched by further turning 5 °, and FIG. 9 shows a state in which 11a has been matched again by further turning 5 °.
[0039]
Since such a torque adjusting device can adjust the angle in increments of 5 °, it is performed by inserting the adjusting piece 14 and fixing the movable piece 13 at a position where the operability is improved by the above operation.
[0040]
In this embodiment, an example is shown in which the phase difference between the slits formed in the movable piece 13 and the adjustment piece 11 is set to 5 °, but if desired, the angle can be set to 3 ° and 1 ° at a finer angle. Torque adjustment is possible.
[0041]
Further, when changing the torque to a weak direction, the movable piece 13 is rotated in the clockwise direction and adjusted by the same procedure as described above.
[0042]
Next, a description will be given of a method for obtaining the pitch when the locking portion is provided to the adjustment piece 11 as the second piece member.
[0043]
First, the pitch of the movable piece 13 that is the first piece member is set, the number of times of adjusting the angle of the adjustment piece 11 that is the second piece member is determined every time, and the second relational expression is based on the following relational expression. The pitch (position) of the locking portions formed on the piece member is obtained by calculation.
Multiple of {[(pitch of locking part of first piece member) × integer n] − [(pitch of locking part of first piece member / integer m) × integer n]}
In order to adjust the angle by 1 °, the pitch when the locking portion is formed on the adjustment piece 11 as the second piece member is obtained.
[0045]
When the pitch of the locking portion of the first piece member is 15 °, the integer m is set to 15 so that (pitch of the locking portion of the first piece member / integer m) is 1 °. The number 15 is also the number of locking portions of the second piece member.
(15 ° × 1)-(15 ° / 15 × 1) = 14 ° ・ ・ First (15 ° × 2) − (15 ° / 15 × 2) = 28 ° ・ ・ Second (15 ° × 3)-(15 ° / 15 × 3) = 42 ° ・ ・ 3rd (15 ° × 4) − (15 ° / 15 × 4) = 56 ° ・ ・ 4th・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
(15 ° × 15) − (15 ° / 15 × 15) = 210 ° ・ ・ 15th point
From the above, by providing the locking portions formed on the second piece member at a pitch of 14 ° relative to the pitch of the locking portions formed on the first piece member, an angle of 1 ° is obtained. Can be adjusted.
[0047]
As described above, it is effective to use this relational expression in the case where many locking portions are sequentially provided to the second piece member at an equal pitch.
[0048]
In this embodiment, the engaging portion 13a on the movable piece 13 side may be a through slit that penetrates the movable piece 13 in the thickness direction. In this case, although not illustrated, a thin plate-like adjustment piece 14 as a fixing member is externally attached to the locking portion 13a of the movable piece 13 that coincides with the locking portion 11a, 11b or 11c of the adjustment piece 11. By inserting, the movable piece 13 and the adjustment piece 11 can be combined. Thereby, torque adjustment similar to the above-mentioned embodiment can be performed.
[0049]
FIG. 10 is a front cross-sectional view showing another embodiment of the present invention, where the same reference numerals as those in the previous embodiment denote the same members. The present embodiment shows an example in which a movable piece 13 as a first piece member and an adjustment piece 11 as a second piece member are arranged in the length direction. The adjustment piece 11 is a pin 12 having a circular cross section or the like. The movable piece 13 is pivotally abutted on the adjustment piece 11 and rotated to a desired position, and then a semicircular shape having a pin-shaped adjustment piece 14 formed on the outer periphery of both members. It is inserted and fixed from the outside at a position where any one of the locking portions 11a, 11b, and 11c formed of a recess matches the locking portion 131. The formation of the locking portions 11a, 11b, 11c and the locking portion 13b is the same as in the above embodiment.
[0050]
One end 7 a of the torsion spring 7 is inserted into the hole 15 a of the rotating member 15 that rotates integrally with the tubular member 2 to which the handrail is connected, and the other end 7 b is inserted and fixed into the hole 7 b of the movable piece 13. Has been.
[0051]
According to the present embodiment, even after the handrail device is fixed to the wall of the house, the torque of the torsion spring can be adjusted as it is without being removed from the bracket, and the movable piece 13 and the adjustment piece 11 are long. By arranging in the vertical direction, the outer diameter of the cylindrical member 2 can be reduced.
[0052]
In the embodiment described above, the torsion spring 7 has been described using a torsion coil spring. However, any spring that uses a torsion torque such as a torsion bar, spiral spring, or mainspring spring can be applied to the torque adjusting device of the present invention. It is.
[0053]
The adjustment piece 14 is inserted only at one place, but can be fixed at two places by forming slits at symmetrical positions of the slits 11a, 11b, and 11c. In that case, the second adjustment piece is fixed by inserting it after the torque adjustment is completed.
[0054]
In addition, the slits that are the locking portions are formed in a manner opposite to the above-described embodiment, in which a plurality of slits are formed at equal intervals in the adjustment piece 11 that is the second piece member, and the movable piece that is the first piece member. A slit having a phase shift may be formed in the piece 13.
[0055]
Moreover, in the said embodiment, although the torque adjustment apparatus was fixed to the fixed shaft side, it is natural that a torque adjustment apparatus may be fixed to the rotation side.
[0056]
Further, in the above embodiment, the phase difference between the pitches of the first piece member and the second piece member is made constant. For example, the required characteristic is 10 ° → 6 ° → 3 ° → 1 °. It is also possible to design the phase difference to be different.
[0057]
In the present invention, the spring hook 7 a of the torsion spring 7 may be directly connected to the handrail 100.
[0058]
【The invention's effect】
As described above, according to the first aspect of the present invention, a plurality of locking portions are formed on the first piece member, and the second piece member is opposed to the locking portion of the first piece member. Since a plurality of locking portions are formed on the surface with different pitch angles and the angle is adjusted by the phase difference between these two pitches, even when the angle is adjusted with a pitch narrower than the fixed pitch angle formed on the first piece member Since it is not necessary to form the locking portion with the narrow pitch angle, the fine angle can be adjusted without reducing the strength of the locking portion, and the effect that the torque of the torsion spring can be finely adjusted can be obtained.
[0059]
Further, since the torque is adjusted by engaging the fixing member with the engaging portion of the first piece member and the second piece member, the torque of the torsion spring can be changed simply by inserting and removing the fixing member. An effect is obtained.
[0060]
Further, according to the invention described in claim 2, there is an effect that the position where the locking portion is formed on the second piece member can be obtained, and a torque adjusting device in which a desired adjustment angle is set can be easily obtained. .
[0061]
Further, according to the invention described in claim 3, since the first piece member is sheathed on the second piece member, the length in the longitudinal direction is shortened and the effect of being compact can be obtained.
[0062]
Further, according to the invention described in claim 4, it is possible to obtain an effect that the outer diameter of the tubular member 2 can be reduced by arranging the first piece member and the second piece member in the length direction. Furthermore, the fixing member can be inserted from the outside of the device by forming the locking portions on the surface portions of the two piece members, for example, without removing the handrail device from the bracket even after fixing the handrail device to the wall of the house. An effect is obtained that the torque of the torsion spring can be adjusted as it is.
[0063]
According to the fifth aspect of the present invention, it is possible to easily adjust the torque of the torsion spring and finely adjust the torque, and to set a movable handle device that urges the handrail to rotate with a preferable operating force. The effect that it can be obtained.
[0064]
According to the invention described in claim 6, even if the torque characteristic of the torsion spring is a linear characteristic, it can be approximated to the rotational moment characteristic of the handrail by the shape of the cam, and the movable handle with better operability. There is an effect that a device is obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing a handle device according to an embodiment of the present invention.
FIG. 2 is a side view showing a handle device according to one embodiment.
FIG. 3 is a side view showing a handle device according to one embodiment.
4 is a cross-sectional view taken along line AA of FIG. 3 showing a main part of the handle device according to the embodiment.
FIG. 5 is an exploded perspective view showing a handle device according to one embodiment.
6 is a cross-sectional view taken along the line BB of FIG. 4 showing the torque adjustment device of one embodiment.
FIG. 7 is a cross-sectional view showing adjustment of the adjustment device.
FIG. 8 is a cross-sectional view showing adjustment of the torque adjusting device.
FIG. 9 is a cross-sectional view showing adjustment of the torque adjustment device.
FIG. 10 is a front sectional view showing a handle device according to another embodiment of the present invention.
[Explanation of symbols]
1 Bracket 2 Tube member 3 Shaft 5 Fixing plate 6 Cam member 7 Torsion spring 8 Slide member 10 Spring 11 Adjustment piece (second piece member)
13 Movable piece (first piece member)
14 Adjustment piece 15 Rotating member

Claims (6)

A device for adjusting the torque of a torsion spring hung between a mating member,
A first piece member provided with a plurality of locking portions on a circumference at a predetermined pitch angle;
A plurality of locking portions whose phases are shifted from the locking portions of the first piece member are provided on a surface facing the locking portion of the first piece member, and the first piece member is rotatable relative to the first piece member. A second piece member arranged to face the piece member;
A locking member that engages with the locking portion of the first piece member and the locking portion of the second piece member and fixes the relative rotation of both members;
A torque adjusting device, wherein one end of a torsion spring is locked to either the first piece member or the second piece member, and the other end of the torsion spring is locked to the mating member . The torque adjusting device according to claim 1, wherein the first piece member is externally mounted on the second piece member so as to be relatively rotatable. The torque adjusting device according to claim 1, wherein the first piece member and the second piece member are arranged in contact with each other in the length direction so as to be relatively rotatable. In a movable handle device that rotationally biases the handrail by a torsion spring,
A first piece member having a plurality of locking portions provided on the circumference at a predetermined pitch angle;
A plurality of locking portions whose phases are shifted from the locking portions of the first piece member are provided on a surface facing the locking portion of the first piece member, and the first piece member is rotatable relative to the first piece member. A second piece member arranged to face the piece member;
A locking member that engages with the locking portion of the first piece member and the locking portion of the second piece member and fixes the relative rotation of both members;
One end of a torsion spring is locked to either the first piece member or the second piece member, and the other end of the torsion spring is indirectly or directly connected to the handrail. Handle device. 5. The handle apparatus according to claim 4, further comprising a cam mechanism in which the frictional resistance changes following the magnitude of an elevation angle that changes as the handrail rotates. A handle device in which a handrail is attached to a cylindrical member rotatably supported by a bracket on a fixed side, and a cam mechanism and a torque adjusting device are arranged inside the cylindrical member,
The cam mechanism has a cam member that rotates with the rotation of the handrail and a slide member that presses against the cam surface of the cam member by a spring, and follows the magnitude of the elevation angle that changes with the rotation of the handrail. Has become a mechanism to change,
The torque adjusting device includes: a first piece member in which a plurality of engagement parts are provided on a circumference at a predetermined pitch angle; and a plurality of engagement parts that are out of phase with the engagement part of the first piece member Is provided on a surface facing the locking portion of the first piece member, and is disposed so as to face the first piece member so as to be rotatable relative to the first piece member, A locking member that engages with the locking portion of the piece member and the locking portion of the second piece member and fixes the relative rotation of both members, and either the first piece member or the second piece member And a torsion spring that stores torque that urges the handrail in the opposite direction as the handrail rotates, with one end locked to the cam member and the other end locked to the cam member. Features a handle device.

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