JP2016202677A5 - Standing assistance chair and standing assistance device used therefor - Google Patents

Description

The present invention relates to a standing auxiliary chair provided for use by a person with weak legs and a standing assistance device used therefor .

As an example, Patent Document 1 discloses a structure using a torsion coil spring (kick spring) as means for moving a seat. In this Patent Document 1, the seat is connected to the leg portion so as to tilt while being raised and lowered by an X-type link mechanism, and by urging the link mechanism with a spring, Is supported. And in patent document 1, the lever which switches between the state which the urging | biasing force of a spring acts on a link mechanism, and the state which does not act is provided in the vicinity part of the armrest.

The present invention includes many configurations, and typical configurations are specified in each claim . Of these, the invention of claim 1 constitutes a superordinate concept of the standing support chair, and the standing support chair is provided with a seat attached to a leg portion so as to be lifted or tilted back and forth, or lifted and tilted back and forth, and the seat. It said seat by a spring means for supporting the upright movement and sitting movement of a person and energized, standing kinematic support during the people a person moves from the seating state to the standing state as when seated dynamic support to shift in the seating state from the upright state Reaction force switching means for automatically changing the urging force of the spring means against.

The invention according to claim 6 is the posture and position according to any one of claims 1 to 5, wherein the seat is lifted while tilting forward in a side view while retreating as a whole during the standing motion support. Are changing. The invention of claim 6 can be independent from the configuration of claims 1 to 5.
The invention according to claim 7 is a standing assistance device that is arranged between a leg portion and a seat of a chair and supports the seat so as to move up and down, tilt forward and backward, or lift and tilt forward and backward, and bias the seat. Spring means for supporting a person's standing motion and seating motion, and the spring for the seat during a standing motion support when the person transitions from a seated state to a standing state and when a person supports a seating motion when transitioning from a standing state to a seated state Reaction force switching means for automatically changing the urging force of the means.

In the present invention, the urging force for the seat can be changed between the standing motion support and the seat motion support while using the spring means, so that the seat can be biased with an appropriate strength when standing and when sitting. Accordingly, while retaining the advantage of simplifying the structure by using a spring means as the urging means, people that sit in Turkey and or chair rising from a chair, can be carried out smoothly and safely.

In the embodiment, the leg portion 1, the seat 2, and the backrest 3 are made of wood, but any material can be set arbitrarily. For example, the seat 2 and the backrest 3 can have a structure in which a cushion is stretched on a resin shell. Legs 1, metal pipe made or resin, or may be made of aluminum die-casting. The leg portion does not need to be a four-leg type, and may have a form in which 4 to 5 branch legs extend radially from the lower end of the leg column. It is also possible to make the seat 2 horizontal.

The seat 2 is supported by a mechanism unit (stand-up assisting device) 11 so as to tilt in a side view while moving up and down. That is, in a state where a person is seated, the seat 2 is lowered to a substantially horizontal posture as shown in FIG. 1A, and when the person leaves the seat, as shown in FIG. 2 rises and tilts forward so that the rear end is higher. In addition, the seat 2 moves backward while being raised, and when it is fully raised, it moves backward by a certain size (for example, about several centimeters to 10 centimeters). In this retreated state, even if a person stands, the auxiliary horizontal frame 8 does not hit the foot. In addition, since the front horizontal rail 6 is shifted backward, the feet of a person standing do not hit the front horizontal rail 6.

The upper end of the rear link 15 is connected to the upper support 12 by a third shaft 18, and the third shaft 18 is inserted into a side plate of the upper support frame 12 and a downward bracket 19 provided on the lower surface of the upper support frame 12. Has been. The third shaft 18 is separated into two on the left and right, and the third shaft 18 is not positioned between the left and right downward brackets 19. The lower end of the rear link 15 is connected to the lower support 13 by the fourth shaft 20, and the fourth shaft 20 is connected to the left and right side plates of the lower support frame 13 and the upward bracket 21 provided on the lower surface of the lower support frame 13. It is inserted.

On the other hand, since the lower half of the long hole 33 warps obliquely downward and rearward, the direction of action of the urging force by the spring 23 is directed to the direction of sleeping with respect to the long hole 33 when seated. The spring force does not act strongly as the push-up force of the seat 2, and can be set to a force sufficient to raise the seat 2 at the initial stage of the standing motion. Thereby, the feeling of pushing up with respect to a person can be eliminated.

Furthermore, in the seated state, the fifth shaft 26 can be brought as close to the fourth shaft 20 as possible, so that the urging force of the spring 23 against the seat 2 can be weakened. As a result, the person can sit down smoothly without receiving a push-up feeling .

FIG 6 (B) shows a state in which the seat 2 is fully raised, the reach this state, the urging force of the spring 23 against the fifth shaft 26 is released, FIG. 7 (A) and FIG. 8 As shown, the fifth shaft 26 descends along the elongated hole 33. In this state, the posture of the rear link 15 hardly changes. Therefore, the seat 2 remains raised. Note that the spring unit 22 may be biased by a weak spring in the direction of turning downward.

Therefore, the acting ratio of the urging force of the spring 23 is gradually changed from L7 / L6 to L5 / L4, the moment acting on the seat 2 is increased, and the spring 23 is contracted to reduce the elastic force. It will increase. Due to the increase in the moment and the increase in the elastic force, the total urging force (reaction force received by the seat 2) with respect to the seat 2 gradually increases as the seat 2 descends as shown by the curve B in FIG. ( Gradual increase ).

Therefore, the person does not receive a feeling of pushing up by the seat 2 in a state where the seat 2 is fully lowered. Further, as shown in the graph of FIG. 9A, the sudden decrease in the urging force is performed in a state in which the seat 2 is almost completely lowered (the end of the descent). never give a sense of discomfort.

It is also possible to provide a rotary damper on the shaft such as the fourth shaft 20 to smooth the displacement from the sitting state to the standing state. Further, the backrest and the seat may be integrated.

1 leg 2 seat 3 backrest 8 armrest
11 Mechanism (Standing assist device)
12 Upper support frame 13 Lower support frame 14 Front link 15 Rear link 22 Spring unit 23 Spring 24 Front spring receiver 25 Rear spring receiver 26 Fifth shaft (connecting portion)
33 Long hole 35 Guide roller 36 Guide body as an example of guide means 37 Guide surface 37a Low slope 37b Main slope

Claims (7)

A seat attached to the leg to be lifted or tilted back and forth, or lifted and tilted back and forth, spring means for supporting the person's standing motion and sitting motion by urging the seat, and the person from the sitting state to the standing state standing dynamic support during the people migration to have a reaction force switching means for automatically changing the biasing force of said spring means relative to the seat between the seating time kinematic support to shift in the seating state from the upright state,
Standing auxiliary chair. At the time of standing motion support, the urging force of the spring means against the seat increases as a person transitions from the seated state to the standing state, while the maximum biasing force of the spring means at the time of the seating motion support is It is smaller than the maximum urging force at the time of standing up support,
The standing assistance chair according to claim 1. The seat is supported by a leg portion so as to move up and down at least by a link mechanism having a plurality of links. By connecting one end of the spring means to the link mechanism, a person's standing motion and seating motion can be prevented. Supported,
By changing the position of the connecting portion between the spring means and the link mechanism between the standing motion support in which the seat is raised and the sitting motion support in which the seat is lowered, the standing motion support and the sitting motion support are performed. Different energizing power,
The standing assistance chair according to claim 1 or 2. The biasing force of the spring means with respect to the seat at the time of the seating movement support is gradually increased from the start of the seating movement by the guide means and is changed so as to be greatly reduced at the end.
The standing assistance chair according to claim 2 or 3. One end of the spring means is connected to the link mechanism so as to move relative to the up and down direction, and the connecting portion is at a high position at the time of the upright support,
When the link mechanism is completely rotated in the standing support direction, the connecting portion of the spring means with respect to the link mechanism is lowered by the weight of the spring means or the biasing means. The biasing force is lower than the final biasing force at the time of standing support,
And, at the time of the seating movement support, the downward movement of the connecting portion of the spring means with respect to the link mechanism is guided by the guide body in the inclined posture in the side view, so that the urging force at the time of the seating movement support gradually increases. It changes so as to greatly decrease at the terminal part,
The standing assistance chair according to claim 4. At the time of supporting the standing motion, the seat changes its posture and position so as to rise while tilting forward in a side view while retreating as a whole.
The standing-up auxiliary chair according to any one of claims 1 to 5. A stand-up assisting device that is arranged between a leg portion and a seat of a chair and supports the seat so as to move up and down or tilt forward and backward or tilt and back and forth.
Spring means for supporting the person's standing motion and sitting motion by urging the seat, and during the standing motion support when the person transitions from the sitting state to the standing state and when the person moves from the standing state to the sitting state And a reaction force switching means for automatically changing the urging force of the spring means against the seat.
Standing assist device for chairs.