JP2002065391A - Chair with assisting device for standing up - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with an assisting device for standing up which can be reduced in burden on an user as the chair with an assisting device for standing up can support standing movements made by the user until he/she is almost in an upright posture. SOLUTION: Extending an activating rod 28 rotates the first linkage 18 for moving back of a seat surface into a direction A and the second linkage 20 for moving back of a seat surface into a direction B. A back of the seat surface 7 moves up and forward, while leaning forward, or into a direction C, since a rotating path made by the first linkage 18 for moving back of a seat surface is different from that of the second linkage 20 for moving back of a seat surface. The third linkage 23 for moving an armrest is turned around into a direction D. As the first linkage 18 and the third linkage 23 for moving an armrest form a parallel linkage, an armrest 11 to which an end of a mobile, basic shaft 21 for armrest is attached moves up and forward, or into a direction E, without changing the posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair with a stand-up assist device capable of standing up with minimum ability when a person with weak legs or a handicapped stands up.

[0002]

2. Description of the Related Art An upright assisting chair disclosed in Japanese Patent Application Laid-Open No. Hei 8-257061 has been disclosed in which a seat plate is provided on a leg portion so as to be able to move up and down by a lifting drive device. In this standing assistance chair, when standing from a state of sitting on a seat plate, the seat plate is raised obliquely upward, thereby pushing up the buttocks diagonally upward to facilitate standing. However, since this standing assistance chair simply raises the seat plate diagonally upward,
When actually standing, the upper body must be moved forward. Such an operation can be performed only by a person who has the ability to move the weight forward by strongly grasping the armrest and a person with relatively strong legs and hips, so for people with weak legs and weak arms and people with weak arms, There was a problem that merely raising the seat plate diagonally upward was of little use.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a chair with a stand-up assist device which can support a stand-up operation to a position close to a stand-up position, thereby remarkably reducing a burden on a user. The purpose is to provide.

[0004]

For this purpose, a chair with a stand-up assisting device according to the present invention has a backrest for supporting the back of a seated person, and is fixed to the backrest so that both sides of the seated person are spaced from the backrest. A left and right side plate having a pin hole formed at a lower end thereof for fitting a height adjustment pin; and a left and right side plate disposed at a sitting posture height between the left and right side plates and positioned on a thigh of a seated person. A seating surface portion comprising a fixed-side front seating surface fixed to the rear surface, a movable side rear seating surface located at the buttocks and capable of ascending and moving forward while tilting forward, and ascending from an upper surface opening provided in the left and right side plates. It has a left and right armrest fixed to the upper end of the advancing armrest support base, and a height adjustment mechanism with holes opened at regular intervals in the vertical direction, and is fitted into a pin hole at the lower end of the left and right side plates to increase the height. Height adjustment that fits the occupant's body depending on the position where the adjustment pin is inserted Are those composed of a leg portion that can. Further, a rear seat supporting base is provided at a lower portion of the rear seat, and on both left and right sides of the rear seat supporting base,
A first link for rear seating movement pivotally supported at one end by a first link rotating support shaft fixed at one end to the front upper portion of the rear seat supporting body and the other end to the left and right side plates; A second link for rear seating movement pivotally supported by a lower rear portion of the support base and the other end pivotally supported by a second link rotation support shaft fixed to the left and right side plates, and the armrest support base is provided rearward. An end of the armrest movement reference shaft through which the first link for seating movement is inserted is pivotally supported at the lower front part of the armrest support base, and a third link rotation support shaft fixed to the inner wall surface of the left and right side plates. A third link for armrest movement that pivots on the fulcrum is pivotally supported at the lower rear portion of the armrest portion support matrix, and the rotation of the first link for rear seating motion causes the rear seat surface support matrix to tilt forward. The armrest support base can be raised and advanced while raising and moving forward Than it is.

[0005]

An embodiment of the present invention will be described below with reference to the drawings. As shown in the partial cross-sectional front view of FIG. A left and right side plate 5 of a hollow narrow rectangular parallelepiped with a pin hole 4 formed at the lower end for supporting both sides of a seated person and a height adjustment pin 3 fitted therein, and a seating posture height between the left and right side plates 5. A fixed-side front seating surface 6 fixed to the left and right side plates 5 at the thigh of the seated person; and a movable side rear seating surface 7 at the buttocks that can move upward and forward while tilting forward. And a left and right armrest 11 fixed to the upper end of an armrest support base 10 which rises and advances from an upper surface opening 9 provided in the left and right side plate 5, and has holes at regular intervals in the vertical direction. And a pin hole at the lower end of the left and right side plate 5. The fitted height adjustment pin 3
And an L-shaped leg 13 whose height can be adjusted according to the position of the occupant according to the insertion position.

Further, the main structure of the chair with a rising assist device according to the present invention will be described in detail. As shown in the sectional side view of the main part of FIG. Front seat 6 when ascending and moving forward while leaning forward
In order not to contact with the rear seating surface 6, a rear seating surface supporting base body 15 formed of a truncated pyramid-shaped housing having an inclined surface 14 on the front seating surface 6 side is provided. A first link 18 for rear seating movement pivotally supported by a first link rotation support shaft 17 of a fixed platen 16 which is pivotally supported at the front upper portion of the surface support base 15 and has the other end fixed between the left and right side plates 5;
One end is pivotally supported at the rear lower portion of the rear seat support base 15 and the other end is pivotally supported by a second link rotation support shaft 19 of a fixed plate 16 fixed between the left and right side plates 5. A link 20 is provided. The first link 18 for the rear seat movement and the second link 20 for the rear seat movement are arranged such that the first link 18 for the rear seat movement is arranged upward in an inclined state, and the second link for the rear seat movement is provided. 20 is placed horizontally below,
Rotational trajectory of the first link 18 for rear seat movement with the first link rotation support shaft 17 as a fulcrum and the second link rotation support shaft 19
Is arranged so that the rotation locus of the second link 20 for the rear seat movement with the fulcrum as a fulcrum is different from that of the rear seat support base 1.
5, that is, the rear seating surface 7 rises and moves forward while tilting forward. The armrest maneuvering reference shaft 21 passed through the rear seating surface support matrix 15 and passed between the armrest portion supporting matrixes 10 penetrates the rear seating surface support matrix 15 side of the rear link 18 for the rear seating surface movement. The armrest mobility reference axis 2
1 is fitted with the first link 18 for rear seat movement.

As shown in the sectional side view of the main part of FIG. 2, the armrest support base 10 which rises and advances from the upper surface opening 9 provided in the left and right side plates 5, is provided with the above-mentioned rear seating surface movement. The end of the armrest movement reference shaft 21 through which one link 18 is inserted is pivotally supported at the lower front part of the armrest support base 10, and the first link 18 for rear seating movement is also used as the link mechanism of the armrest support base 10. On the other hand, a third link 23 for armrest movement that rotates around a third link rotation support shaft 22 fixed to the inner wall surface of the left and right side plates 5 is used as an armrest support base 1.
The armrest support base 10 moves so as to follow the rear seat support base 15 following the movement of the rear link 18 for the rear seat movement. Further, the third link for armrest exercise 23 is arranged so as to be in a parallel posture with the first link 18 for rear seat movement, and constitutes a parallel link mechanism integrally with the first link 18 for rear seat movement. Then, the armrest supporting body 10 is raised and moved forward while maintaining the parallel posture. In addition, as shown in the partial cross-sectional front view of FIG. 1, the guide hole 24 is provided at an inner wall surface on the front seating surface 6 side of the left and right side plates 5 at a position corresponding to a rotation locus where the armrest movement reference shaft 21 rotates.
Is formed so that the armrest movement reference shaft 21 can freely move in the guide hole 24, and assists the ascent and support of the armrest portion supporting base 10. In addition, the armrests 11 need to support the weight during all operations, so that the hands can be prevented from slipping forward.

Further, a motor actuator 25 for operating the rear seating surface 7 and the armrest 11 is provided as shown in FIG.
One end of the motor actuator 25 is rotatably fixed to a fixed bar 26 that extends to the lower part of the backrest 2 between the left and right side plates 5, and the other end is extended between the first links 18 for rear seating motion. The tip of an operation rod 28 is pivotally fixed to the center of the support shaft 27. Therefore, the motor actuator 25 is disposed in an inclined shape facing forward and upward on the front seating surface 6 side as shown in a cross-sectional side view of a main part in FIG. When the first link 18 for rear seat movement is rotated with the fulcrum 17 as a fulcrum, the armrest maneuver supported by the first link 18 for rear seat movement together with the first link 18 for rear seat movement is supported. The reference shaft 21 is rotated, and the first link 18 for rear seat movement and the second link 20 for rear seat movement are arranged at an interval in the up-down direction and the first link 1 for rear seat movement.
8 and the third link for armrest movement 23 are arranged at an interval in the left-right direction, so that the rear seating surface supporting base 15, that is, the rear seating surface 7, is raised and advanced while tilting forward, and the armrest supporting base. 10, ie the armrest 11 can be raised and advanced.

Next, the rising operation of the chair with a rising assist device of the present invention will be described. In the standing posture state of the chair with the rising assist device shown in the explanatory view of FIG. When the motor actuator 25 is operated by operating a switch (not shown) for operation, the operating rod 28 is extended to rotate the first link 18 for rear seating surface movement toward the front seating surface 6 in the direction of arrow A, At the same time, the rear link 20 for the rear seat movement connected to the rear seat support base 15 is rotated in the direction of arrow B with the second link rotation support shaft 19 as a fulcrum, and the first link rotation support shaft 17 is moved. Since the rotation trajectory of the first link 18 for the rear seat movement that is the fulcrum and the rotation trajectory of the second link 20 for the rear seat movement that is the fulcrum about the second link rotation support shaft 19 are different, the rear seat surface is different. Lifting base 15, i.e. the rear seat 7 is raised and advanced with the front inclined arrow C direction.

On the other hand, when the first link 18 for rear seat movement is rotated toward the front seat 6 in the direction of arrow A, the armrest movement reference shaft 21 inserted through the first link 18 for rear seat movement is rotated. Is raised and advanced toward the front seating surface 6 along the guide hole 24, and the armrest third link 23 connected to the armrest support base 10 is supported by the third link rotation support shaft 22 as a fulcrum in the direction of arrow D. And the first link 18 for the rear seating movement and the third link 23 for the armrest movement form a parallel link mechanism, so that the armrest support supporting the end of the armrest movement reference shaft 21 is fitted. The mother body 10, that is, the armrest portion 11 rises and moves forward in the direction of the arrow E without changing the posture.

During the extension operation of the motor actuator 25, the arms of the occupant remain on the armrests 11 and the upper body does not change their posture, and the rear seat surface 7 rises while gradually tilting forward. And because it moves forward, you can easily move the center of gravity of the body forward and shift to the lower limb side, even during operation, maintain balance with weak force while creating a support surface with the upper limb and buttocks You can get up safely.

Eventually, it will be in a standing posture position indicated by a broken line in the explanatory view of FIG. 3, and in the rising operation, it is necessary to be able to simultaneously perform the operation of leaning the body forward and the operation of pushing the body up, The standing posture position shown in the side view of FIG. 4 allows the use of the armrest portion 11 to exert a force downward and downward by hand, thereby exerting a push-up force of the body at the time of forward bending of the body. The necessary lifting force can be exerted when the thighs leave the chair. In addition, the pushing up force of the body until the thighs separate from the chair is supplemented and reduced by ascending and moving forward while tilting the exercise-side rear seat surface 7 forward. Therefore, when the thighs separate from the chair, the armrests 11 are raised and advanced together with the rear seat surface 7, so that the force can be exerted rearward and downward by hand without changing the sitting posture of the upper limb, and the burden on the lower limb The lower limb can be used for lowering, and the upper limb can be used to support the center of gravity after the thighs have separated from the chair.

[0013]

[Effects] The chair with a rising assist device of the present invention can support the rising motion to a posture close to the standing posture, thereby significantly reducing the burden on the user. When you get up, you can get up with the minimum ability. In addition, since the armrests follow the movement of the rear seating surface of the buttocks, the armrests and the buttocks create a support surface with a weak force and maintain balance even during operation. You can get up.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view showing a seating position of a chair with a rising assist device according to the present invention.

FIG. 2 is a cross-sectional side view of a main part showing a seating position of the chair with a rising assist device according to the present invention.

FIG. 3 is an explanatory view showing a rising operation of the chair with a rising assist device of the present invention.

FIG. 4 is a side view showing a rising position of the chair with a rising assist device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cushion 2 Backrest part 3 Height adjustment pin 4 Pin hole 5 Left and right side plate 6 Front seating surface 7 Rear seating surface 8 Seat surface portion 9 Upper surface opening 10 Armrest support base 11 Armrest 12 Height adjustment mechanism 13 Legs 14 Slope Surface 15 Rear seat support base 16 Fixing plate 17 First link rotary support shaft 18 First link for rear seat motion 19 Second link rotary support shaft 20 Second link for rear seat motion 21 Armrest movement reference axis 22 Third Link rotation support shaft 23 Third link for armrest movement 24 Guide hole 25 Motor actuator 26 Fixed bar 27 Support shaft 28 Operating rod

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hidefumi Uetani 3-3-24 Denen, Hirosaki City, Aomori Prefecture Heim N R201 (72) Inventor Yuichi Hirakawa 2-6-26 Fuushiko, Hirosaki City, Aomori Prefecture Sumi Kobayashi 2

Claims (2)

[Claims] 1. A backrest portion for supporting a back of a seated person, and a pin hole fixed to the backrest portion, supporting both sides of the seated person at an interval between the backrest portions, and a lower end having a height adjustment pin fitted therein. The left and right side plates and the fixed side front seat surface which is arranged at a sitting posture height between the left and right side plates and is fixed to the left and right side plates and located on the thigh of the occupant and tilted forward at the buttocks A seat surface portion comprising an exercise-side rear seat surface capable of moving upward and forward, and a left and right armrest portion fixed to an upper end of an armrest support base ascending and moving forward from an upper surface opening provided in the left and right side plates. Has a height adjustment mechanism with holes at regular intervals in the vertical direction, and a height adapted to the body of the seated occupant depending on the position where the height adjustment pin is inserted by inserting into the pin holes at the lower ends of the left and right side plates. With adjustable feet, characterized by adjustable feet Chair. 2. A rear seat support body is provided at a lower portion of the rear seat surface, and one end is pivotally supported on the left and right sides of the rear seat support base at one end by a front upper portion of the rear seat support base. A first link for rear seating motion pivotally supported by a first link rotation support shaft fixed to the left and right side plates, and one end pivotally supported by the lower rear portion of the rear seating support base and the other end to the left and right side plates. A second link for rear seating movement pivotally supported by a fixed second link rotation support shaft, wherein the armrest support base is an end of an armrest movement reference shaft through which the first link for rear seating movement is inserted. The arm link supports a third link for armrest movement that pivots around a third link rotation support shaft fixed to the inner wall surfaces of the left and right side plates. It is pivotally supported at the lower rear part of the support base. Claim 1 rising aid with chair, wherein the can raise and advance the armrest support base with raising and forward while the front inclined support base.