JP4430919B2 - Standing auxiliary chair - Google Patents

Description

  [Technical Field] The present invention relates to a stand-up assistance chair that allows a user who needs stand-up assistance, such as a disabled person or an elderly person whose legs and legs are weakened, to easily take a seat without putting a burden on a leg or knee.

  The conventional stand-up auxiliary chair allows the user to rotate the seat cushion forward with the front portion of the seat cushion as a fulcrum, or to raise the rear portion of the seat cushion via a link mechanism and tilt the seat cushion forward and downward. It is possible to stand up easily (for example, see Patent Documents 1 to 3).

Japanese Utility Model Publication No. 63-133141 (first page, FIG. 4) Japanese Utility Model Publication No. 1-1141543 (first page, FIG. 2) JP 2000-254178 A (page 3, FIG. 2)

  However, in the stand-up auxiliary chairs described in Patent Documents 1 to 3, although the seat cushion can be easily inclined because the seat cushion is tilted at the time of stand-up, only the seat cushion is tilted forward and downward, so that it is stable. There was a problem of lack of feeling, and there was still room for improvement.

  The present invention has been made in view of such problems of the prior art, and can take a standing posture from a sitting posture or a sitting posture from a standing posture in a more natural manner, and has a sense of stability. The purpose is to provide a stand-up assistance chair that secures a certain seat.

In order to achieve the above object, the invention according to claim 1 of the present invention is a stand-up auxiliary chair provided with a seat cushion having a seat cushion frame and a seat back having a seat back frame , wherein the seat An actuator having one end pivotally attached to the lower side of the cushion frame; a first link having one end fixed to the rear portion of the seat cushion frame and the other end pivotally attached to the other end of the actuator; and a rear portion of the seat cushion frame A second link in which one end is pivotally attached and a recess is formed, a swing shaft in which one end is pivotally attached to the rear portion of the seat cushion frame and the other end is pivotally attached below the seat cushion frame, A support frame having an upper end attached to the seat back frame, and a pin implanted in the support frame. And the pin is housed in the recess having two corners so that the seat back can swing within a predetermined angle range with respect to the seat cushion, and the actuator is operated. Accordingly, when the rear portion of the seat cushion frame is raised obliquely rearward, the seat cushion and the seat back rotate integrally with the vicinity of the front portion of the seat cushion as a fulcrum, and the pin is in the recess. The seat back is moved backward, and the front edge of the seat cushion is allowed to escape backward by a link mechanism including the swing shaft .

  According to a second aspect of the present invention, a battery is attached below the seat cushion, and the actuator is operated by supplying power to the actuator by the battery.

The invention according to claim 3 further includes an armrest, and the armrest is provided with a grip portion that can be gripped by a user.

Since the present invention is configured as described above, the following effects can be obtained.
According to the standing assistance chair according to the present invention, the actuator is connected to the rear portion of the seat cushion, and the actuator is operated to rotate the seat cushion and the seat back integrally with the front portion of the seat cushion as a fulcrum. It is possible to take a seat in a more natural manner and secure a sense of stability when taking a seat.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a stand-up auxiliary chair S according to the present invention, and a seat cushion 4 attached to four legs 2 and a seated state from the rear edge of the seat cushion 4 (state shown in FIG. 1). ) And a seat back 6 that rises obliquely backward.

  The seat cushion 4 has a seat cushion frame 8, and the seat cushion frame 8 is covered with a cushion material 10. Similarly, the seat back 6 has a seat back frame 12, and the seat back frame 12 is covered with a cushion material 14. In addition, armrests 16 are attached to both sides of the seat cushion 4.

  Of the four legs 2, the two legs 2 provided on the same side (right side or left side) are joined at the upper ends so as to have a substantially inverted V shape, and the front leg 2 is the rear side. It is set shorter than the leg 2. The front legs 2 are connected to each other by a connecting shaft 18, and the rear legs 2 are connected to each other by a connecting shaft 20.

  Further, both ends of a pair of left and right battery / actuator support frames (hereinafter simply referred to as support frames) 22 having a substantially U shape are joined to the front and rear connecting shafts 18 and 20, and the battery 24 is connected to one support frame 22. Is attached. Further, the front portions of the pair of support frames 22 are connected by a connecting shaft 26, and one end (lower end) of the actuator 30 is connected to the other end (rear end) of the link 28 having one end (front end) fixed to the connecting shaft 26. Is pivotally attached.

  A rear bracket 32 extending downward from the lower surface of the seat cushion frame 8 is joined to both sides of the rear portion of the seat cushion frame 8, and an intermediate portion of the left and right rear brackets 32 is connected by a connecting shaft 34. One end (upper end) of the link 36 is fixed to the connecting shaft 34, and the other end (upper end) of the actuator 30 is pivotally attached to the other end (lower end) of the link 36.

  The rear bracket 32 has a first convex portion 32a formed so as to protrude downward in a seated state and a second convex portion 32b formed so as to protrude rearward. The pair of left and right rear brackets 32 are connected to each other by first connecting portions 32 a by connecting shafts 38. In addition, one end of a link 40 and a swing shaft 42 is pivotally attached to each end portion of the connecting shaft 38, and a recess 40 a having two corners is formed on the other end side of the link 40. The other end of the shaft 42 is pivotally attached to the rear leg 2 via a bracket 44. A buffer member 46 that contacts the connecting shaft 20 is attached to one end of the link 40.

  Further, a front bracket 48 extending downward from the lower surface is joined to both sides of the front portion of the seat cushion frame 8. A U-shaped bracket 50 is pivotally attached to the front bracket 48, and the upper end of the front support shaft 52 is joined to the U-shaped bracket 50, and the lower end of the front support shaft 52 is connected to the connecting shaft via the bracket 54. It is pivotally attached to 18. The pair of left and right front support shafts 52 are connected by a connecting shaft 56.

  On the other hand, an upper end portion of a support frame 58 extending downward is screwed to the seat back frame 12, and a bracket 60 is joined to the lower end of the support frame 58. The upper end of the bracket 60 is pivotally attached to the second convex portion 32b of the rear bracket 32, and a pin 62 is planted at the lower end of the bracket 60. The pin 62 is accommodated in a concave portion 40a formed in the link 40. .

  Each armrest 16 includes a pair of front and rear vertical arms 64 and 66 whose lower ends are fixed to the seat cushion frame 8, and a horizontal arm 68 connected to the upper ends of the vertical arms 64 and 66. It should be noted that the front end of the horizontal arm 68 is joined to a portion spaced downward by a predetermined distance from the upper end of the front vertical arm 64, and the upper end 64a of the front vertical arm 64 is a grip when the user is seated or standing. Has become a department.

  The battery 24 is, for example, 24V, and the actuator 30 is operated by a remote controller (not shown).

The operation of the stand-up auxiliary chair S according to the present invention having the above configuration will be described below.
When standing up from the seated state, when the remote control is operated, the actuator 30 is powered by the battery 24 and the actuator 30 is activated. The actuator 30 is gradually extended by the screw action, and the upper end of the actuator 30 is raised obliquely rearward. Since the upper end of the actuator 30 is pivotally attached to the link 36, the connecting shaft 34 is pushed up via the link 36, and together with the connecting shaft 34, the rear bracket 32 joined to the seat cushion frame 8 and the rear bracket The bracket 60 pivotally attached to the second convex portion 32b of 32 and joined to the lower end of the support frame 58 gradually rises obliquely rearward.

  As a result, the seat cushion 4 rotates forward with the pivoting portion between the front bracket 48 and the U-shaped bracket 50 as a fulcrum, and the front support shaft 52 swings with the pivoting portion with the connecting shaft 18 as a fulcrum. As the seat cushion 4 rotates forward, the inclination angle of the seat back 6 gradually changes from the rearward inclined state of FIG. 3A to the forward inclined state of FIG. That is, as shown in FIG. 3A to FIG. 3E, the seat cushion 4, the seat back 6, and the armrest 16 rotate integrally, and in the standing state of FIG. Can stand up easily without placing a burden on the legs or knees. At this time, since the body can be lifted by grasping the grip portion 64a (the upper end portion of the front vertical arm 64) 64a of the armrest 16 with both hands, the user can easily take a standing posture.

  On the other hand, when sitting from the standing state, when sitting on the standing auxiliary chair S in the state shown in FIG. 3E and operating the remote controller, the actuator 30 is powered by the power supplied from the battery 24 to actuate the screw. As a result, the actuator 30 gradually contracts, and the upper end of the actuator 30 descends obliquely forward. Therefore, the seat cushion 4, the seat back 6, and the armrest 16 integrally rotate rearward with the pivotal portion of the front bracket 48 and the U-shaped bracket 50 as a fulcrum, and the seat cushion 4, the seat back 6, and the armrest 16 16, the posture gradually changes from the forward tilted state of FIG. 3 (e) to the rearward tilted state of FIG. 3 (a) along with the rearward rotation thereof, so that the user can easily perform without burdening the legs and knees. It is possible to sit down.

  Further, in the seated state of FIG. 3A, the shock absorbing material 46 attached to the link 40 comes into contact with the connecting shaft 20, so that the impact at the time of sitting can be reduced.

  The pin 62 implanted at the lower end of the bracket 60 of the support frame 58 is accommodated in the recess 40a of the link 40 pivotally attached to the connecting shaft 38, and the seat back 6 is in a predetermined angular range with respect to the seat cushion 4. Can be swung within. However, when the seat back 6 rises, the rear portion of the seat back 6 is lifted, so that the pin 62 moves from the lower contact portion of the recess 40a to the front end side, and the seat back 6 is tilted at the same time as the movable range is narrowed. It can stand up easily without its upper body being pressed down.

  Further, as shown in FIGS. 3A to 3E, when the seat cushion 4 is raised, the front edge of the seat cushion 4 escapes backward by a link mechanism such as the swing shaft 42. The front edge of the user does not push the user's leg forward, and it is not necessary to shift the buttocks by protruding forward while the seat surface is inclined.

  In the above embodiment, the actuator 30 is operated by the remote controller. However, as shown in FIG. 4, the armrest 16 is provided with an operation lever 70, and the operation lever 70 is lifted to take a standing posture. It is also possible to take the posture at the time of sitting by depressing the operation lever 70.

  Further, as shown in FIG. 4, the horizontal arm 68 may be joined to the upper end of the front vertical arm 64, and the grip portion of the armrest 16 may be provided on the front portion 68 a of the horizontal arm 68.

It is a side view of the stand-up auxiliary chair concerning the present invention. It is a front view of the stand-up auxiliary chair of FIG. FIG. 2 is a series of side views showing an operation of the standing assistance chair of FIG. 1 when sitting or standing. It is a partial side view of the stand-up auxiliary chair concerning this invention when the operation lever which operates an actuator is provided in the armrest.

Explanation of symbols

2 legs, 4 seat cushions, 6 seat backs,
8 Seat cushion frame, 10,14 Cushion material,
12 seat back frame, 16 armrest,
18, 20, 26, 34, 38, 56 connecting shaft, 22 support frame,
24 batteries, 28, 36, 40 links, 30 actuators,
32 rear bracket, 32a first convex part, 32b second convex part,
40a recess, 42 swing shaft, 44, 54, 60 bracket,
46 cushioning material, 48 front bracket, 50 U-shaped bracket,
52 front support shaft, 58 support frame, 62 pins,
64, 66 vertical arm, 64a, 68a grip, 68 horizontal arm,
70 Operation lever, S Standing auxiliary chair.

Claims (3)

A stand-up auxiliary chair comprising a seat cushion having a seat cushion frame and a seat back having a seat back frame ,
An actuator having one end pivotally attached to the lower side of the seat cushion frame; a first link having one end fixed to a rear portion of the seat cushion frame and the other end pivotally attached to the other end of the actuator; and the seat cushion frame A second link in which one end is pivotally attached to the rear portion and a recess is formed, and a swing shaft in which one end is pivotally attached to the rear portion of the seat cushion frame and the other end is pivotally attached to the lower side of the seat cushion frame And a support frame having an upper end attached to the seat back frame, and a pin implanted in the support frame,
When the pin is accommodated in the recess having two corners, the seat back can swing within a predetermined angle range with respect to the seat cushion, and the seat cushion is activated by operating the actuator. When the rear part of the frame is raised obliquely rearward, the seat cushion and the seat back rotate integrally with the vicinity of the front part of the seat cushion as a fulcrum, and the pin moves to the front end side in the recess. The stand-up auxiliary chair is characterized in that the seat back is moved backward and the front edge of the seat cushion is released backward by a link mechanism including the swing shaft . The stand-up auxiliary chair according to claim 1, wherein a battery is attached below the seat cushion, and the actuator is operated by supplying power to the actuator by the battery. The stand-up assistance chair according to claim 1 or 2 , further comprising an armrest, wherein the armrest is provided with a grip portion that can be gripped by a user.

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