JPH0451784Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a chair for physically disabled people.

[Prior art]

When sitting on or standing up from a chair, it is necessary to simultaneously bend and stretch the knees and hips while supporting the body weight with the knees and hips. For this reason, for people who have difficulty bending and stretching their knees or hips, or for people with low motor skills (physically weak people), sitting down and standing up can be quite painful. In particular, standing up requires lifting the body with the knees and hips.
It seems like it would be even more painful.

In order to deal with this problem, a chair for the physically handicapped is proposed in Publication of Utility Model Publication No. 61-3401. In this chair, the front end of the seat plate (seating part) is attached to the support base so that it can rotate in the vertical direction, and is always biased upward by a spring and can be released when it is horizontal to the support base. It is configured to be locked.
As a result, when a seated person stands up from a chair, if the seat is unlocked from the support base, the seat rotates upward in response to the rising motion, lifting the seated person's buttocks and relieving some of their body weight. Support reduces the burden on the knees and lower back.

[Problem that the invention attempts to solve]

However, in the above-mentioned chair, the seat portion rotates upward around its front end, and the forward inclination angle of the seat portion increases in response to the rising motion. For this reason, the seated person is subjected to an acting force that causes the seated person to slide downward from the seating portion, and this acting force is supported by the knees, so that the burden on the knees is not reduced much.

Therefore, the purpose of the present invention is to enable the seated person to move the seat up and down in a stable state, and to allow the seated person to move away from the seat without strain, especially when the knees are almost extended during upward movement. , to greatly reduce the burden on the knees and lower back.

[Means for solving problems]

The present invention relates to a chair for the physically handicapped, and the chair includes:
A chair main body having a first seating part and a backrest integrated therewith, which are assembled so as to be movable horizontally upwardly forward and downwardly rearward with respect to a supporting member standing up on the floor; and assembled to the supporting member. When the main body portion is positioned rearward and downward, a second seating portion is positioned in front of the first seating portion at approximately the same height as the first seating portion and horizontally, and the main body portion is moved to the front upper side. and a drive means positioned at the rear and lower side.

[Functions and effects of the idea]

In this configuration, when the seated person attempts to stand up from the chair, the driving means is activated to move the main body of the chair forward and upward. During this movement, the first seating part that constitutes the main body of the chair always remains in a horizontal state, and the backrest also maintains the state before the movement, and only the second seating part is separated from the main part of the chair and remains at the lower rear. . Therefore, the seated person moves forward and upward in a stable sitting position to a height close to that of a standing position, and the knees are almost fully extended because the second seating part does not support the front of the thighs. Therefore, after the main body of the chair has stopped at a predetermined position in the upper front, the seated person can stand up without putting strain on his knees and lower back by moving away from the main body of the chair.

Furthermore, when sitting on a chair, the person intending to sit places his buttocks on the first seating part of the main body of the chair located at the upper front. If the driving means is operated in this state to move the main body of the chair rearward and downward, the seated person will move rearward and downward in a stable state seated on the main body of the chair, and return to the second seating part at the stop position. Even if you twist, it will be supported and will be in a completely seated state. Therefore, even when the seated person sits down, there is little need for bending and stretching of the knees and hips, and the burden on both of them is greatly reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show the chair according to the first embodiment of the present invention in the lower rear and upper front positions. The chair is comprised of a chair main body part 10a, an auxiliary part 10b, and a drive mechanism 20 that also serves as a support function.

The main body part 10a of the chair includes a first seating part 11, a backrest 12 fixedly assembled to the rear of the seating part 11,
It consists of a pair of left and right armrests 13 that are fixedly assembled on both sides of the backrest 12 and project forward, and brackets 14 are fixed to both sides of the lower part of the first seating part 11 and the backrest 12, respectively. on the other hand,
The chair auxiliary part 10b consists of a second seating part 15, and brackets 16a and 16b are fixed to the front and rear parts of the lower portion of the seating part 15 on both left and right sides, respectively. These chair main part 10a and auxiliary part 10
b is supported by the drive mechanism 20 and rotated forward and upward and rearward and downward.

The drive mechanism 20 includes a link mechanism 20a and a power cylinder 20b serving as a drive means. The link mechanism 20a includes a pair of left and right first, second, and third links, and one end of the first link 21 and the second link 22 are rotatably connected to the front and rear ends of the bracket 14 of the chair main body 10a. , and both links 21,
The other end of 22 is rotatably connected to the front and rear positions of frame 31. The frames 31 are arranged on the left and right sides in front of the fixed frame 32.
The third link 23 connects the chair auxiliary part 10b to the first link 21, and one end of the third link 23 connects the chair auxiliary part 10b to the first link 21.
5 and the other end is the first
They are rotatably connected to the intermediate portions of the links 21, respectively. Front bracket 16 of second seating portion 15
A is rotatably connected to left and right brackets 33 fixed to the upper front part of the frame 31. The power cylinder 20b has a cylinder part 24 and a rod part 2.
5 and a motor section 26, and the rod section 25 is configured to move forward and backward relative to the cylinder section 24 by the motor drive of the motor section 26. In such a power cylinder 20b, a bracket 3 is fixed to a fixed frame 32 at the bottom of the cylinder portion 24.
The armrest 13
The first switch 17a provided on the outside of the rod is actuated to advance the rod portion 25 by a predetermined amount, and the second
The rod portion 25 is activated by operating the switch 17b.
is moved back by a predetermined amount.

A chair with such a configuration functions as a chair when it is in the lower rear position as shown in FIG.
That is, in this state, the chair main body part 10a is located at the lower rear, the chair auxiliary part 10b is located in front of the main body part 10a, and the first seating part 11 and the second seating part 15 are horizontal and substantially the same. , and forms a normal seating area. Therefore, the seated person can take a stable sitting posture as shown by the two-dot chain line, and it is difficult for a normal person to stand up in this state.
Can perform sitting movements.

When the seated person shown in FIG. 1 operates the first switch 17a, the rod portion 25 of the power cylinder 20b moves forward by a predetermined amount and pushes the connecting rod 27 upward. As a result, the first and second links 21 and 22 of the link mechanism 20a rotate around the other end, pivoting the chair main body 10a forward and upward by a predetermined amount without changing its state, and at the same time assisting the chair. The portion 10b connects its rear end to the first and third links 2.
1 and 23, and rotates forward about its front end. FIG. 2 shows the chair in this state, where the seated person maintains a stable sitting position due to the main body portion 10a of the chair and reaches a height close to that of a standing position. In this state, the front part of the thigh is not supported by the chair auxiliary part 10b, so the knee is almost extended, and as shown by the two-dot chain line, it is separated from the main body part 10a of the chair, putting a strain on the knee and lower back. I can stand up without any hesitation.

On the other hand, when sitting on a chair, the person intending to sit assumes the posture shown by the two-dot chain line shown in FIG. 2, gets on the main body part 10a of the chair, and operates the second switch 17b. As a result, the rod portion 25 of the power cylinder 20b is moved back by a predetermined amount to rotate the chair main body portion 10a rearward and downward, and at the same time rotate the chair auxiliary portion 10b rearward. As a result, both of these 10a, 1
0b returns to the state shown in FIG. 2 and functions as a normal chair, maintaining the seated person in a normal sitting posture. Therefore, even when sitting down, there is no strain on the knees and lower back.

In addition, in the above embodiment, the chair main body part 10a
Although an example has been shown in which the link mechanism 20a and the motor-driven power cylinder 20b are used to move the link mechanism 20a, a driving means such as a hydraulic cylinder or a pneumatic cylinder may be used in place of the power cylinder 20b. The drive means may be directly connected and moved without using the drive means.

3 to 5 show a chair according to a second embodiment of the present invention. The chair has a backrest assembled using a known reclining mechanism, and employs a link mechanism 40a that is different from the link mechanism 20a of the first embodiment.

The link mechanism 40a consists of a pair of left and right first, second, and third links 41, 42, and 43, and one end of the first link 41 is attached to the upright frames 35a and 35b that are erected at the front of the fixed frame 32, as shown in FIG. As shown in FIG. 7, they are rotatably connected by a pin 41a, and the other end is connected to a rail 35c provided on the bracket 14 on the first seating portion 11 side with a roller 41 as shown in FIG.
They are movably connected via b. In the second link, one end is attached to a pin 42a on the bracket 14 on the first seating portion 11 side as shown in FIG.
The other end is movably connected to a rail 36b provided on a bracket 36a on the fixed frame 32 side via a roller 42b, as shown in FIG. The first link 41 and the second link 42 are rotatably connected to each other at the end of a connecting rod 44, as shown in FIG.
2 are also connected. Further, one end of the third link 43 is rotatably connected to the intermediate portion of the first link 41, and the other end is rotatably connected to the second seating portion 15 rotatably assembled to the upright frame 35b. is connected to.

The power cylinder 40b serving as the driving means has the same configuration as the power cylinder 20b of the first embodiment, and the tip of its rod portion 45 is rotatably attached to the left and right first links 41 as shown in FIG. and is fixed to a rod 46 that connects both links 41, 41. Note that a stay 16 is rotatably attached to the front portion of the first seating portion 11 and the front portion of the armrest 13.

In a chair with such a configuration, the backrest 12 is tilted forward by pushing the switch 18a provided on the outside of the armrest 13 forward, and the switch 18a is pressed forward.
Tilts backward by pushing backward.

When the second switch 18b provided on the outside of the armrest 13 is pushed in the seated state shown in FIG.
As a result, the other ends of the first and second links 41 and 42 are slid to move the chair main body part 10a forward and upward, and the third link 43 is rotated to move the rear side of the chair auxiliary part 10b upward. Rotate to. During this time, the limit switch 1 provided on the first link 41
9a comes into contact with the third link 43, and the power cylinder 40b stops. As a result, as in the chair of the first embodiment, the seated person maintains a stable sitting position due to the main body portion 10a of the chair, and attains a height close to that of the standing position.
In this state or in a state in which the backrest 12 is tilted forward as shown in FIG. 5, the user can leave the main body part 10a of the chair and stand up without putting any strain on the knees and lower back. Further, when the seated person sits in this state and presses the switch 18b as shown in FIG. 5, the power cylinder 40b is actuated and the rod portion 4
5 retreats and pulls down the first link 41, the chair main body part 10a moves backward and downward, and the rear side of the chair auxiliary part 10b rotates downward. During this time,
Limit switch 19b provided on the second link 42
comes into contact with the first link 41 and the power cylinder 40
b stops. As a result, the chair main part 10a and the auxiliary part 10b return to their original positions, and the seated person enters the seated state shown in FIG. 4. A third switch 18c provided on the outside of the armrest 13 is an emergency stop switch.

[Brief explanation of the drawing]

FIG. 1 is a side view of the chair according to the first embodiment of the present invention, located at the lower rear of the chair, FIG. 2 is a side view of the chair located at the upper front of the chair, and FIG. 3 is a side view of the chair according to the second embodiment. FIG. 4 is a side view of the same chair corresponding to FIG. 1, FIG. 5 is a side view of the same chair corresponding to FIG. 2, and FIG. 6 is a side view of the chair corresponding to FIG. 7 is a sectional view in the direction of the same arrow, FIG. 8 is a sectional view in the direction of the same arrow, FIG. 9 is a sectional view in the direction of the same arrow, and FIG. 10 is a sectional view in the direction of the same arrow. A sectional view in the direction, Fig. 11 shows the same arrow -
FIG. Explanation of symbols, 10a...Chair main body part, 10b...
...Chair auxiliary part, 11...First seating part, 12...Backrest, 13...Armrest, 15...Second seating part, 2
0a, 40a... link mechanism, 20b, 40b...
...Power cylinder, 21-23, 41-43...
Link.

Claims (1)

[Scope of utility model registration request] A chair main body having a first seating part and a backrest integrated therewith, which are assembled so as to be movable horizontally upwardly forward and downwardly rearward with respect to a supporting member standing up on the floor; and assembled to the supporting member. When the main body portion is located rearward and downward, a second seat portion is located in front of the first seat portion at substantially the same height as the first seat portion and horizontally.
A chair for the physically handicapped, comprising a seating part and a driving means for moving the main body part to position it in the upper front and lower rear positions.