JP4015747B2 - Standing auxiliary chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stand-up auxiliary chair that assists a user's stand-up operation by pushing up a seat.
[0002]
[Prior art]
For those who have weak muscles in the lower limbs, not only will they be burdened with walking, but will also be burdened when standing up from a chair. As welfare equipment that can reduce such a burden, Japanese Utility Model Laid-Open No. 7-9327 and Japanese Patent Laid-Open No. 9-56749 disclose that a seat is configured to rotate around the front end of the seat from a state in which the seat of the chair is flattened. A stand-up assisting chair has been proposed that assists a person who is sitting by standing up by pushing up the rear end.
[0003]
In this type of auxiliary chair, a lever is arranged on the lower surface of the armrest, and when a seated person stands up and grips the lever, the rear end of the seat is pushed up.
[0004]
[Problems to be solved by the invention]
However, such a welfare device is generally used by a person with low physical strength, and there is a problem that the operation itself for gripping the lever is a burden for such a person.
[0005]
In view of the above-described problems, an object of the present invention is to realize a stand-up auxiliary chair that can be easily operated even by a person with reduced physical strength.
[0006]
Another object of the present invention is to realize a stand-up auxiliary chair that can slowly perform a rising operation and a sitting operation.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, a seat portion, armrests arranged on both sides of the seat portion, and a rear portion of the seat portion so that the seat portion is rotated from the flat state toward the front end side of the seat portion. A stand-up assisting mechanism comprising: a seat push-up mechanism that assists a stand-up operation of a seated person by pushing up the end; and an operation unit that starts the push-up operation of the rear end of the seat with respect to the seat push-up mechanism. In the chair, the operation unit includes an operation piece arranged on the upper surface of the armrest , and a link mechanism for mechanically transmitting the pushing operation of the operation piece to the seat part push-up mechanism. By pushing down the operation piece on the upper surface portion, the seat portion push-up mechanism starts the push-up operation of the rear end portion of the seat portion .
[0008]
In the present invention, when a person who is sitting is trying to stand up, if the operation piece arranged on the upper surface of the armrest is pressed down, the seat push-up mechanism pushes up the rear end of the seat, so even a person with reduced physical strength You can get up easily from the chair. Here, since the operation piece is operated to be pressed down on the upper surface of the armrest to the last, if the user puts his hand on the operation piece and puts his weight as it is, the seat push-up mechanism moves the rear end of the seat. Start pushing up. Therefore, since the user does not need to perform an operation of grasping the lever, even a person with reduced physical strength can easily operate. Moreover, since the operation | movement of putting a hand on the upper surface of an armrest and putting weight on is an operation | movement performed naturally when standing up from a chair, it is convenient for a user.
[0009]
In the present invention, it is preferable that a leg is provided below the seat , and the seat push-up mechanism includes a push-up spring and a fluid cylinder between the leg and the seat. When configured in this manner, the valve of the fluid cylinder is opened in conjunction with the pushing operation of the operation piece, so that the seat part push-up mechanism is in the flat position with respect to the seat part. The pushing-up operation of the rear end portion of the seat by the pushing spring is started, and the pushing-up speed of the rear end portion of the seat is kept low by the fluid cylinder. Therefore, it is possible to perform slowly rising action, good usability I bet to the user.
[0010]
In the present invention, when the valve of the fluid cylinder is opened in conjunction with the pushing operation of the operation piece, the seat portion when sitting on the seat portion in a state where the rear end portion of the seat portion is pushed up It is preferable that the return to the flat posture is allowed and the speed at which the seat returns to the flat posture while resisting the push-up spring is suppressed by the fluid cylinder. If comprised in this way, since the operation | movement which sits down can be performed slowly, it is convenient for a user.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(Overall structure)
1A and 1B are a front view of a stand-up auxiliary chair of this example, and a right side view in which an operation unit configured on an armrest thereof is enlarged. FIG. 2 is a right side view of the standing assistance chair of this example.
[0012]
As shown in FIGS. 1A and 2, the standing assist chair 1 includes a leg portion 2, a seat portion 3 having a square planar shape, a backrest portion 4, and an armrest 5.
[0013]
The leg portion 2 is composed of four wooden legs 21, 22 in the front, rear, left, and right directions, and these legs 21, 22 are appropriately curved to enhance stability and design as a chair.
[0014]
The armrest 5 is composed of a pair of left and right elbows that are bolted to the upper end of the leg 2 on both sides of the seat 3. Of the left and right armrests 5, an operation unit 80 described later with reference to FIG. 1B is configured on the distal end side of the armrest 5 positioned on the right hand side of the person sitting. Here, the operation unit 80 may be arranged on the left hand side.
[0015]
The backrest portion 4 is affixed to the back plate 43 that is bolted to the rear end portion of the armrest 5 at the rear side of the seat portion 3 and the substantially intermediate position in the height direction of the rear leg 22, and the front surface of the back plate 43. The back cushion 42 is formed.
[0016]
(Configuration of the seat push-up mechanism 6)
In the stand-up auxiliary chair 1 of this example, when a user who is sitting on the seat 3 between the seat 3 (seat plate 30) and the leg 2 tries to stand up, as shown by a two-dot chain line in FIG. By pushing up the rear end portion 31 of the seat portion 3, the seat portion push-up mechanism 6 is configured to assist the user's rising action.
[0017]
3 and 4 are perspective views showing a state in which the seat push-up mechanism 6 configured in the stand-up auxiliary chair 1 of the present embodiment pushes up the rear end portion 31 of the seat 3, and the seat 3 is flattened. It is a perspective view which shows the state made to do.
[0018]
In FIG. 3, first, the seat part push-up mechanism 6 includes a square fixing plate 61 fixed to the leg 2 side and a square plate fixed to the seat plate 30 constituting the lower surface of the seat 3. A push-up plate 62 is provided. Each of the seat plate 30 and the push-up plate 62 has a window portion for reducing the weight and increasing the strength. The push-up plate 62 is formed with connecting portions 621 and 622 for connecting to the seat plate 30 with bolts or the like.
[0019]
The side surface portion 625 of the push-up plate 62 is overlapped so as to be positioned outside the side surface portion 611 at a position closer to the front of the fixed plate 61. In these overlapping portions, the shaft end 630 of the rotation center shaft 63 disposed horizontally in the lateral direction is supported at a position closer to the front of the fixing plate 61 (front end portion of the seat portion 3). For this reason, the push-up plate 62 can rotate around the rotation center axis 63 in either the direction of the arrow A or the direction of the arrow B.
[0020]
Around the rotation center shaft 63, two coil-shaped push-up springs 64 are mounted. Of the two ends of the push-up spring 64, one end abuts on the sloped portion 692 of the spring receiver 69 disposed on the fixed plate 61, and the other end abuts against the back surface portion 622 of the push-up plate 62. It touches. Therefore, the push-up spring 64 is disposed between the leg portion 2 side and the seat portion 3 side, and the push-up plate 62 is urged around the rotation center shaft 63 in the direction of arrow A.
[0021]
Further, the seat part push-up mechanism 6 includes a push-up force adjusting mechanism 60 for adjusting the urging force of the push-up spring 63. In this push-up force adjusting mechanism 60, the spring receiver 69 connected to the bolt 693 is moved back and forth by turning the head (not shown) of the bolt 693 protruding from the front end surface of the fixing plate 61 in either direction. It is configured to move in either direction. For example, when the spring receiver 69 is moved forward, the end of the push-up spring 64 moves to a higher position of the slope portion 692, so that the force by which the push-up spring 64 pushes up the push-up plate 62 increases. It has become. Since a block 694 for defining the position of the push-up spring 64 is attached to the rotation center shaft 63 at a position where the bolt 693 passes, a lower end portion of the block 694 is a groove for passing the bolt 693. 695 is formed.
[0022]
As the push-up force adjusting mechanism 60 for adjusting the urging force of the push-up spring 63, in addition to the structure shown in FIG. 3, the push-up spring 63 is adjusted by adjusting the upward projecting amount of the screw secured to the fixing plate 61 from below. The structure which adjusts the position of the edge part of this may be sufficient.
[0023]
Furthermore, in this embodiment, the seat part push-up mechanism 6 is provided with a gas cylinder 9 (fluid cylinder) that acts in parallel with the push-up spring 64 between the leg part 2 side and the seat part 3 side. In this gas cylinder 9, the main body portion 91 is fixed to the leg portion 2 side, but the tip of the operating shaft 92 is connected to the seat portion 3 side through a horizontal shaft 620 attached to the push-up plate 62. ing. Here, a sleeve 604 extends from the valve 93 of the gas cylinder 9 toward the operation portion 80 formed on the armrest 5, and a wire 605 is passed through the sleeve 604. A return spring 603 is arranged for the wire 605, and the wire 605 is always pulled toward the valve 93. Therefore, the valve 93 is in a closed state unless a special operation is performed in the operation unit 80. On the other hand, as will be described later, when the wire 605 is pulled toward the operation unit 80, the valve 93 is opened and the gas cylinder 9 is operated.
[0024]
(Configuration of operation unit 80)
As illustrated in FIG. 1B, the operation unit 80 includes an operation piece 81 including a push button attached to the upper surface portion 501 of the armrest 5, and a link mechanism 84 that mechanically connects to the operation piece 81. ing.
[0025]
The operation piece 81 includes an upper portion 811 that is formed in a spherical curved surface along the palm, and a cylindrical portion 812 that protrudes downward from the upper portion 811. A stepped through-hole 503 is formed in the armrest 5 so as to penetrate the armrest 5 in the vertical direction, and a lower portion 812 of the operation piece 81 is inserted into the through-hole 503 shallowly from above. A shaft body 82 is inserted from the lower end opening of the through hole 503, and the upper end portion of the body portion 821 that is the upper portion of the shaft body 82 is connected to the lower end portion of the operation piece 81. The lower end portion of the shaft body 82 is a flange portion 822 having a larger diameter than the lower end opening of the through hole 502, and the flange portion 822 is located below the lower surface portion 502 of the armrest 5. A screw hole is formed from the lower end surface of the flange 822 along the axial direction of the shaft body 82, and a screw 823 is attached to the screw hole.
[0026]
Inside the through-hole 503 formed in the armrest 5, a coil spring 83 is disposed via a sleeve 505 so as to surround the trunk portion 821 of the shaft body 82, and the coil spring 83 is arranged inside the operation piece 81 and the through-hole 503. Between the first step portion 504 and the first step portion 504. Accordingly, the operation piece 81 is urged upward by the coil spring 83 as indicated by the arrow L2, but since the collar portion 822 of the stopper piece 82 is caught by the lower surface portion 502 of the armrest 5, the operation piece 81 is provided. Does not escape upward from the through hole 502. Even if the operation piece 81 is pushed downward against the biasing force of the coil spring 83, the operation piece 81 remains on the second step portion 500 formed on the inner peripheral surface of the through hole 503. Since it hits the upper surface of the thick part, it will not move downward any further.
[0027]
A case 87 in which the link mechanism 84 is housed is attached to the lower surface portion 502 of the armrest 5. The link mechanism 84 includes a horizontal shaft 851 supported at both ends by the side plate 871 of the case 87, a first link piece 85 rotatable around the horizontal shaft 851, and a connecting shaft connected to the tip of the first link piece 85. 841 and a second link piece 86 connected via 841. The distal end of the second link piece 86 is a flange 861, and this flange 861 can move on the bottom plate 872 of the case 87 in the directions of arrows N 1 and N 2. The connecting shaft 841 is located directly below the operation piece 81 (just below the shaft body 82), and the upper end surface of the first link piece 85 is in contact with a portion corresponding to the head of the screw 823 fixed to the shaft body 82. Therefore, as shown by the arrow L1, when the operation piece 81 is pushed downward, the upper end surface of the first link piece 85 is pushed down via the shaft body 82, and the first link piece 85 and the second link piece 86 are pushed. Means that the connecting shaft 841 is expanded. For the purpose of securing a large pulling amount for the wire 605, the wire 605 is configured to be pushed down at the lower end on the front end side of the first link piece 85 when the operation piece 81 is pushed downward.
[0028]
In addition, a wire 605 connected to the valve 93 of the gas cylinder 9 is drawn into the case 87 via the side plate 873. A cylindrical pin 606 is attached to the distal end portion of the wire 605, and the pin 606 is held by the flange portion 861 of the second link piece 86.
[0029]
(How to use the stand-up auxiliary chair 1)
With reference to FIG. 1 thru | or FIG. 4, the usage method of the standing assistance chair 1 is demonstrated.
[0030]
First, when the stand-up auxiliary chair 1 is used as a normal chair, as shown in FIG. 4, the gas cylinder 9 is in a retracted state and the push-up plate 62 is in a flat posture. Thus, the seat part 3 is also in a flat state. When the hand is away from the operation piece 81, the wire 605 is pulled in the direction of the arrow N2 by the return spring 603 (see FIG. 3), so that the valve 93 of the gas cylinder 9 is in the closed state. . Further, in the link mechanism 84, since the wire 605 is pulled in the direction of the arrow N2, the connecting shaft 841 of the link mechanism 84 floats upward, and the first link piece 85 and the second link piece 86 are connected to each other. It is bent at 841.
[0031]
From this state, if a person sitting on the seat 3 tries to stand up and puts his right hand on the operation piece 81 arranged on the upper surface 501 of the armrest 5 and puts his weight, the operation piece as shown by the arrow L1. 81 is depressed. Accordingly, since the connecting shaft 841 of the link mechanism 84 is pressed down, the first link piece 85 and the second link piece 86 are pushed and spread at the portion of the connecting shaft 841, and the collar portion 861 moves in the direction of the arrow N1. . Therefore, since the wire 605 is pulled in the direction of the arrow N1, the valve 93 of the gas cylinder 9 is opened. As a result, the push-up plate 62 is biased by the push-up spring 64 and the push-up plate 62 rises obliquely, so that the push-up plate 62 rotates around the front end side of the seat portion 3 as shown by a two-dot chain line in FIG. The rear end portion 31 of the seat portion 3 is pushed up. Therefore, the user can stand up with the help of that power. At this time, the speed at which the seat portion 3 rises is kept low by the gas cylinder 9, so that the user can rise up slowly.
[0032]
Then, when the user releases his hand from the operation piece 81, the seat 6 stops. At this time, the operation piece 81 is urged by the coil spring 83 and floats. Further, since the wire 605 is pulled in the direction of the arrow N1 by the return spring 603 (see FIG. 3), the first link piece 85 and the second link piece 86 are set so that the connecting shaft 841 is lifted upward. Is bent with the connecting shaft 841 as a node.
[0033]
When the user sits down on the seat 3 (see the seat 3 indicated by a two-dot chain line in FIG. 2) that has stood up obliquely in this way, the user places the right hand on the operation piece 81 on the seat 30. Place and apply weight. Therefore, since the operation piece 81 is pressed down, the connecting shaft 841 of the link mechanism 84 is pressed down. Therefore, the first link piece 85 and the second link piece 86 are expanded at the portion of the connecting shaft 841, and the collar portion 861 moves in the direction of the arrow N1, so that the wire 605 moves in the direction of the arrow N1. Be pulled. As a result, the valve 93 of the gas cylinder 9 is opened, and the push-up plate 62 returns to the flat posture while resisting the push-up spring 64 according to the weight of the user, so that the user is in the flat posture. (See the seat 3 shown by the solid line in FIG. 2). Thus, since the speed at which the seat portion 3 returns to the flat posture is suppressed by the gas cylinder 9, the user can sit down slowly.
[0034]
Then, the user releases his hand from the operation piece 81 when he is completely seated. Therefore, the operation piece 81 is lifted by being biased by the coil spring 83. Further, since the wire 605 is pulled in the direction of the arrow N1 by the return spring 603 (see FIG. 3), the first link piece 85 and the second link piece 86 are set so that the connecting shaft 841 is lifted upward. And return to the bent state with the connecting shaft 841 as a node.
[0035]
(Effect of this embodiment)
Thus, in the stand-up auxiliary chair 1 of this example, when the person who is sitting is going to stand up, if the operation piece 81 arranged on the upper surface part 501 of the armrest 5 is pressed down, the seat-up mechanism 6 is moved to the seat part. 3 pushes up the rear end portion 31, so even a person with low physical strength can easily stand up. Here, since the operation piece 81 is operated so as to be pressed down on the upper surface portion 501 of the armrest 5, if the user puts his / her hand on the operation piece 81 and puts the weight as it is, the seat push-up mechanism 6 is moved to the seat portion. The operation of pushing up the rear end portion 3 of 3 is started. Therefore, since the user does not need to perform an operation of grasping the lever, even a person with reduced physical strength can easily operate. Moreover, since the operation | movement which puts a hand on the upper surface 501 of the armrest 5 and puts a weight is an operation | movement performed naturally when standing up from a chair, it is convenient for a user.
[0036]
Moreover, in the stand-up auxiliary chair 1 of this embodiment, in the seat part push-up mechanism 6, the push-up spring 64 and the gas cylinder 9 are arranged in parallel between the leg part 2 and the seat part 3. Therefore, when the push-up spring 64 pushes up the rear end portion 31 of the seat portion 3 with respect to the seat portion 3 in the flat posture, the push-up speed is kept low by the gas cylinder 9. Therefore, since the rising operation can be performed slowly, it is convenient for the user. Further, when sitting on the seat portion 3 in the state of being pushed up obliquely, the return speed to the flat posture while resisting the push-up spring 64 of the seat portion 3 is also kept low by the gas cylinder 9. Therefore, since the sitting operation can be performed slowly, it is convenient for each user.
[0037]
【The invention's effect】
As described above, in the stand-up assistance chair according to the present invention, when the person who is sitting is going to stand up, when the operation piece arranged on the upper surface of the armrest is pressed down, the seat-up mechanism is the rear end of the seat. Because the part is pushed up, even a person with weak physical strength can easily stand up from the chair. Here, since the operation piece is configured to be operated so as to be pressed down on the upper surface of the armrest, if the user puts the palm on the operation piece and puts the weight as it is, the seat push-up mechanism pushes up the rear end of the seat Start operation. Therefore, the user does not have to perform an operation that requires a force to grip the lever. In addition, the operation of placing a palm on the upper surface of the armrest and applying the weight is a natural operation when standing up from a chair, and is convenient for the user.
[Brief description of the drawings]
FIGS. 1A and 1B are a front view of a stand-up auxiliary chair to which the present invention is applied, and an enlarged right side view of an operation unit configured on an armrest thereof, respectively.
FIG. 2 is a right side view of the standing assistance chair shown in FIG.
FIG. 3 is a perspective view of a seat part push-up mechanism when the seat part is pushed up in the auxiliary chair for standing up shown in FIG. 1;
4 is a perspective view of a seat part push-up mechanism when the seat part is flattened in the auxiliary chair for standing up shown in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Standing auxiliary chair 2 Leg part 3 Seat part 4 Backrest part 5 Armrest 6 Seat part pushing-up mechanism 9 Gas cylinder (fluid cylinder)
60 push-up force adjusting mechanism 61 fixed plate 62 push-up plate 63 rotation center shaft 64 push-up spring 80 operation portion 81 operation piece 84 link mechanism 85 first link piece 86 second link piece 91 main part 92 of the gas cylinder 92 Actuation shaft 93 Gas cylinder valve 603 Return spring 605 Wire

Claims (3)

The seat part, the armrests arranged on both sides of the seat part, and the person sitting on the seat part by pushing up the rear end part of the seat part so as to rotate around the front end side of the seat part from the flat state. In a stand-up assisting chair having a seat push-up mechanism that assists the stand-up operation, and an operation unit that starts the push-up operation of the seat rear end with respect to the seat push-up mechanism,
The operation unit includes an operation piece disposed on the upper surface portion of the armrest , and a link mechanism for mechanically transmitting a pushing operation of the operation piece to the seat part push-up mechanism,
A push- up auxiliary chair , wherein the push-up operation of the rear end of the seat is started in the seat push-up mechanism by pressing the operation piece on the upper surface of the armrest . In Claim 1, A leg part is provided under the above-mentioned seat part , and the above-mentioned seat part pushing-up mechanism is provided with a spring for raising and a fluid cylinder between the above-mentioned leg part side and the above-mentioned seat part side, When the valve of the fluid cylinder is opened in conjunction with the pushing operation, the seat pushing-up mechanism pushes up the seat rear end by the pushing spring against the seat in the flat posture. And a lifting speed of the rear end portion of the seat portion is kept low by the fluid cylinder.   3. The seat when sitting on the seat in which the rear end of the seat is pushed up by opening the valve of the fluid cylinder in conjunction with the pushing operation of the operation piece. A stand-up auxiliary chair characterized in that the return of the seat to the flat posture is allowed and the return speed of the seat to the flat posture while resisting the push-up spring is suppressed by the fluid cylinder.

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