JP2006034469A - Standing-up assisting chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a standing-up assisting chair for forward tilting, elevating and lowering a seat part and horizontally elevating and lowering an armrest. <P>SOLUTION: The standing-up assisting chair is provided with a base 1, the seat part 3, a first link mechanism for elevating and lowering the seat part 3, a second link mechanism for elevating and lowering the armrest 20, and an actuator 12 for advancing and withdrawing the front part of the seat part 3 to/from the rear part of the base 1. The first link mechanism comprises a rail 5 provided on the base 1, a first link 2 whose upper end part is pivoted to the front part of the seat part 3 and lower end part is engaged with the rail 5 so as to be rotated and slid, a second link 4 pivoted to the first link 2 at the intermediate part and pivoted to the front part of the base 1 at the lower end part, and a third link 6 whose upper end part is pivoted to the rear part of the seat part 3 and lower end part is pivoted to the upper end part of the second link 4. The second link mechanism comprises a fourth link 7 on which the armrest 20 is mounted and whose one end is pivoted to the upper end part of the first link 2, and a fifth link 8 whose upper end part is pivoted to the other end part of the fourth link 7 and lower end part is pivoted to the upper end part of the second link 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stand-up auxiliary chair that has a simple and compact structure that can raise and lower an armrest horizontally while tilting a seat portion forward of the chair.

  As a stand-up assisting chair for assisting the standing-up operation, a chair that moves up and down while tilting forward is known. In general, the auxiliary chair for standing up includes an armrest for a seated person to hold his hand when standing up, and this armrest is often connected to the seat. However, the armrest connected to the seat portion in this way tilts forward in accordance with the movement of the seat portion, so that the armrest tilts when standing up, and it is difficult to apply force. Slippery and dangerous.

  JP-A-2002-65391 is an example of the prior art related to such a standing assist chair. FIG. 18 is a cross-sectional side view of an essential part showing the prior art. This stand-up auxiliary chair has a backrest portion 102 with a cushion 101 stretched thereon, and left and right side plates 105 fixed to the backrest portion 102 and supporting both sides of the seated person.

  Between the left and right side plates 105, there are provided a fixed-side front seat surface 106 and an exercise-side rear seat surface 107 that is located at the heel portion and moves up and moves forward while being inclined forward. An armrest 111 is provided on the left and right side plates 105 via an armrest support base material 110.

  A rear seat surface support base material 115 having an inclined surface 114 on the fixed side front seat surface 106 side is disposed at the lower part of the exercise side rear seat surface 107, and one end is disposed at the front upper portion of the rear seat surface support base material 115. A first link 118 for rear seat surface movement pivotally supported by the first link rotation support shaft 117 of the fixed plate 116 pivotally supported and fixed at the other end between the left and right side plates 105, and one end of the rear seat surface support base material. 115, a second link 120 for rear seat surface movement pivotally supported by a second link rotation support shaft 119 of a fixed plate 116 pivotally supported at the lower rear portion 115 and fixed at the other end between the left and right side plates 105 is provided. Yes.

  The armrest supporting base material 110 pivotally supports the end portion of the armrest maneuvering reference shaft 121 inserted through the first link 118 for back seat motion at the front lower portion thereof, and is fixed to the inner wall surface of the left and right side plates 105. The third link 123 for armrest movement that rotates about the three-link rotation support shaft 122 is pivotally supported at the lower rear portion of the armrest support base material 110.

  In addition, a guide hole 124 is formed at a location where the armrest movement reference shaft 121 hits on a rotation trajectory that rotates. One end of the motor actuator 125 body is pivotally fixed to a fixing bar 126 that is passed to the lower part of the backrest 102 between the left and right side plates 105, and the other end is passed between the first link 118 for rear seat movement. A pivot is fixed to the tip of the actuating rod 128 at the center of the support shaft 127.

  In the stand-up auxiliary chair having such a configuration, the actuating rod 128 extends to rotate the first link 118 for rear seat surface motion in the direction of arrow A and the second link 120 for rear seat surface motion in the direction of arrow B. Since the rotation trajectory of the first link 118 for rear seating motion and the rotation trajectory of the second link 120 for rear seating motion are different, the rear seat surface 107 rises and moves forward while tilting forward in the direction of arrow C. On the other hand, the third link 123 for armrest movement is rotated in the direction of the arrow D, and the first link 118 for back seating movement and the third link 123 for armrest movement form a parallel link mechanism. The armrest portion 111 fitted with the end portion 121 rises and advances in the direction of arrow E without changing the posture (Patent Document 1, paragraphs 0005 to 0007, FIG. 2 and the like).

JP 2002-65391 A

  However, the armrest horizontal elevating mechanism in the above prior art has a problem that there are many parts and it is difficult to ensure rigidity. Moreover, since the above prior art is a mechanism that is established only when the different parallel links (118, 120) are used, it is necessary to lengthen the link in order to increase the lift amount, and a large space is required. There is a problem that design constraints are large.

  The present invention has been made in view of such a problem. The seat can be tilted forward and lower and the armrest can be moved up and down horizontally, the structure is simple, and the lifting amount of the seat can be increased. The purpose is to provide a stand-up auxiliary chair.

  A stand-up auxiliary chair according to the first invention of the present application includes a base, a seat, a first link mechanism that raises and lowers the seat relative to the base, an armrest, and the armrest that rises and lowers the seat. A second link mechanism that moves up and down in alignment with the actuator, and an actuator that advances or retracts the front portion of the seat relative to the rear portion of the base, and the first link mechanism includes the base A rail provided at a rear portion of the first link, a first link having an upper end rotatably connected to a front portion of the seat, and a lower end engaged with the rail so as to be rotatable and movable along the rail; A second link having a lower end rotatably connected to the first link and a lower end rotatably connected to a front portion of the base, and an upper end rotatably connected to a rear portion of the seat. The lower end is the second link A third link rotatably connected to the upper end, and the second link mechanism is mounted with the armrest and one end rotatably connected to the upper end of the first link. The fourth link and a fifth link having an upper end rotatably connected to the other end of the fourth link and a lower end rotatably connected to the upper end of the second link. .

  In the present invention, it is preferable that the armrest is detachably fixed to the fourth link.

  In the present invention, the second link mechanism includes a fourth link having the armrest attached and one end rotatably connected to the upper end of the second link, and an upper end other than the fourth link. You may have a 5th link connected with an end part so that rotation is possible, and a lower end part was connected with the upper end part of the 1st link so that rotation was possible.

  In this invention, it is preferable that the said seat part has a backrest and provides the reclining mechanism of a backrest.

  Moreover, in this invention, it is preferable that the said seat part has a footrest and makes this footrest interlock | cooperate with the reclining mechanism of the said backrest.

  In the present invention, the connection position of the first link and the second link in the first link mechanism, the inclination angle of the rail, the connection position of the third link upper end portion and the rear portion of the seat portion, the third link lower end portion and the It is preferable that at least one of the connecting positions with the upper end portion of the second link is provided to be changeable.

  In the present invention, it is preferable to provide a caster or a height adjuster on the bottom surface of the base.

  A stand-up auxiliary chair according to a second invention of the present application includes a base, a seat, a first link mechanism that raises and lowers the seat relative to the base, an armrest, and the armrest that rises and lowers the seat. A second link mechanism that moves up and down in alignment with the actuator, and an actuator that advances or retracts the front portion of the seat relative to the rear portion of the base, and the first link mechanism includes the base A rail provided at a rear portion of the first link, a first link having an upper end rotatably connected to a front portion of the seat, and a lower end engaged with the rail so as to be rotatable and movable along the rail; The first link is rotatably connected to the middle portion thereof, the lower end portion is rotatably connected to the front portion of the base, the upper end portion is rotatable to the rear portion of the seat portion and in the front-rear direction of the seat portion. The second releasably engaged The second link mechanism includes a fourth link having the armrest attached thereto and one end rotatably connected to the upper end of the first link, and the upper end of the second link mechanism. A fifth link is rotatably connected to the other end of the link and has a lower end rotatably connected to a lower portion of the second link linked to the seat.

  According to the stand-up auxiliary chair of the present invention, the seat portion can be raised and lowered while being inclined obliquely forward, and the armrest can be raised and lowered while maintaining a parallel state. Therefore, the user can easily stand up by placing a hand on the armrest. Further, by providing the first link mechanism and the second link mechanism, the number of parts is reduced and it is easy to ensure rigidity.

  According to the standing assistance chair according to claim 2 of the present application, since the armrest is fixed to the fourth link so as to be detachable, carry-in or carry-out properties are improved.

  According to the stand-up auxiliary chair according to claim 3 of the present application, the second link mechanism is provided with the armrest and the fourth link in which one end is rotatably connected to the upper end of the second link, and the upper end is Since the fifth link has a fifth link rotatably connected to the other end portion of the fourth link and a lower end portion rotatably connected to the upper end portion of the first link, the number of parts is reduced as in the above invention. This makes it easy to ensure rigidity.

  According to the stand-up auxiliary chair according to claim 4 of the present application, since the seat portion has the backrest and the reclining function of the backrest is provided, the user should rest using the reclining function as necessary. Can do.

  Moreover, according to the stand-up auxiliary chair according to claim 5 of the present application, since the seat portion has the footrest, and this footrest is linked with the reclining function of the backrest, the user can easily use the stand-up auxiliary chair as necessary. It can be transformed into a bed shape and used as a bed.

  According to the stand-up auxiliary chair according to claim 6 of the present application, the connection position between the first link and the second link in the first link mechanism, the inclination angle of the rail, the third link upper end portion, and the rear portion of the seat portion. Since at least one of the connecting position and the connecting position between the lower end of the third link and the upper end of the second link is provided to be changeable, the raising / lowering width of the seat portion or the like can be adjusted and changed.

  According to the stand-up auxiliary chair according to claim 7 of the present application, since the caster or the adjuster for height adjustment is provided on the bottom surface of the base, the transportability is improved or the base can be horizontally adjusted.

  According to the stand-up auxiliary chair according to claim 8 of the present application, the first link mechanism is connected to the rail provided at the rear portion of the base and the upper end portion rotatably connected to the front portion of the seat portion, and the lower end portion is A first link rotatably engaged with the rail and movable along the rail, and a first link linked to the first link so as to be rotatable, and a lower end thereof rotatably connected to a front portion of the base. Since the upper end portion has the second link engaged with the rear portion of the seat portion so as to be rotatable and movable in the front-rear direction of the seat portion, the third link is unnecessary and the link mechanism is more It can be simplified.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIGS. 1A, 1B, and 1C are explanatory views of the mechanism of the auxiliary chair for standing up according to the first embodiment of the present invention, and FIG. 1A is a side view showing a state where the seat is in a normal position. FIG. 1B is a side view showing a state where the seat is lifted halfway, and FIG. 1C is a side view showing a state where the seat is lifted to the highest position. 2A, 2B, and 2C correspond to FIGS. 1A, 1B, and 1C, respectively, and the fourth link 7 and the fifth link 8 are omitted, respectively. The first link mechanism is easy to understand.

  The stand-up auxiliary chair includes a base 1, a seat 3, a first link mechanism that raises and lowers the seat 3 with respect to the base 1, an armrest 20, and an armrest 20 that lifts the seat 3. It mainly comprises a second link mechanism that moves up and down in alignment with lowering, and an actuator 12 that advances or retracts the front portion of the seat portion 3 with respect to the rear portion of the base 1.

  In FIG. 2A, the base 1 is arranged in parallel to the base bottom plate 1a via a flat base base plate 1a arranged horizontally and a pair of front and rear vertical members 1b on the base bottom plate 1a. And a base body 1c made of a plate material.

  A rail member 5 shorter than the base body 1c is fixed to the rear portion of the base body 1c so as to incline forward.

  On the other hand, a seat 3 is arranged above the base 1 by a predetermined distance suitable for a seated person to sit on, and on the back surface of the seat 3, the rear side end is more than the seat 3. One end of the slightly short fixed link 9 is fixed, and the other end of the fixed link 9 is fixed to the front side rear surface of the seat portion 3 via the fixing members 10a and 10b so as to maintain a predetermined distance. It is fixed to the front back. Thus, a triangular block is formed by the back surface of the seat portion 3, the fixed link 9, and the fixing members 10a and 10b so that the angle formed between the back surface of the seat portion 3 and the fixed link 9 is an acute angle. The members forming the triangular block are fixed to each other by, for example, bolts and nuts.

  An upper end portion of the first link 2 is rotatably connected to a front end portion of the fixed link 9 via a pivot 17a, and a lower end portion of the first link 2 is a rail member 5 fixed to the base body 1c. The rail member 5 is engaged so as to be rotatable and movable in the length direction of the rail member 5.

  The first link 2 is provided with a second link 4 so as to be rotatable via a pivot 11 (refer to FIG. 1B or FIG. 1C) at an intermediate portion thereof. The end is rotatably connected to the vertical member 1b on the front side of the base 1 via a pivot 17b.

  The lower end portion of the third link 6 is rotatably connected to the protrusion 4 a at the upper end portion of the second link 4 via a pivot 17 c, and the upper end portion of the third link 6 is fixed to the back surface of the seat portion 3. The fixed link 9 is connected to the rear side end of the fixed link 9 via a pivot shaft 17d so as to be rotatable. The rail member 5, the first link 2, the second link 4, and the third link 6 form a first link mechanism.

  In FIG. 1 (a), one end of a fourth link 7 is rotatably connected to the upper end of the first link 2 via a pivot 17e, and the other end of the fourth link 7 via a pivot 17f. One end of the fifth link 8 is rotatably connected. Further, the other end of the fifth link 8 is rotatably connected via a pivot 17g below the connecting portion of the second link 4 to the third link 6. The fourth link 7 and the fifth link 8 as described above form a second link mechanism. The 4th link 7 is provided so that it may maintain substantially horizontal, The armrest 20 represented transparently in the figure to this 4th link 7 is attached.

  The armrest 20 has a parallelogram shape in which the upper side and the lower side are parallel and the upper side protrudes slightly forward from the lower side. The lower side is located slightly below the fifth link 8 and the upper side is a seat. The seated person sitting on the section 3 is positioned above the seating surface of the seat section 3 at an interval that allows the seated person to naturally put his arm on the upper side.

  A pair of armrest mounting members 23 are fixed to the fourth link 7 at intervals in the front-rear direction. The armrest mounting members 23 and the armrest 20 are detachably fixed by, for example, bolts.

  A pair of left and right vertical members 1b on the rear side of the base 1 are provided, and a fixed side end of the actuator 12 is fixed to an equipment frame 13 (see FIG. 4 described later) that connects the vertical members 1b to each other. The movable rod 12a of the actuator 12 is rotatably connected to a connecting member 14 that connects the front ends of the fixed links 9 on both the left and right sides via a protruding piece 15 (see FIG. 4 described later). The connecting portion between the protruding piece 15 and the connecting member 14 is also rotatable.

  A backrest 21 that is longer than the length of the seat 3 and extends obliquely rearward and upward is attached to the rear end of the seat 3.

  3 is an enlarged view showing the link mechanism of FIG. 1A, FIG. 4 is a perspective view of FIG. 3, and FIG. 5 is a perspective view from another angle of FIG.

  In FIG. 3, a base 1 is a flat base bottom plate 1a disposed horizontally, and a plate material disposed on the base bottom plate 1a in parallel with the base bottom plate 1a via a pair of longitudinal members 1b. It is comprised with the base main body 1c which consists of.

  A rail member 5 shorter than the base body 1c is fixed to the rear portion of the base body 1c so as to incline forward. The upper end of the first link 2 is rotatably connected to the front end of the fixed link 9 fixed to the back surface of the seat 3 (not shown) by a pivot 17a, and the lower end of the first link 2 is the base. The rail member 5 fixed to the base body 1c is engaged so as to be rotatable and movable in the length direction of the rail member 5.

  The first link 2 is provided with a second link 4 so as to be rotatable through a pivot 11 in the middle thereof, and the lower end of the second link 4 is pivoted to a longitudinal member 1b on the front side of the base 1. It is rotatably connected via 17b.

  The lower end of the third link 6 is rotatably connected to the protrusion 4 a at the upper end of the second link 4 via a pivot 17 c, and the upper end of the third link 6 is connected to the rear side end of the fixed link 9. It is rotatably connected via a pivot 17d.

  One end of the fourth link 7 is rotatably connected to the discharge part 2a at the upper end of the first link 2 via a pivot 17e, and the fifth link 8 is connected to the other end of the fourth link 7 via a pivot 17f. The lower end portion of the fifth link 8 is connected below the connecting portion of the second link 4 with the third link 6 via the pivot 17g. By such a link mechanism, the fourth link 7 is kept almost horizontal.

  4 and 5, a pair of left and right vertical members 1b on the rear side of the base 1 are provided, and a fixed side end of the actuator 12 is fixed to an equipment frame 13 that connects the vertical members 1b to each other. The movable rod 12a of the actuator 12 is rotatably connected via a protruding piece 15 to a connecting member 14 that connects the front side ends of the fixed links 9 on both the left and right sides. The connecting portion between the protruding piece 15 and the connecting member 14 is also rotatable.

  The 2nd link 4 is located inside the 1st link 2, and the 1st link 2 and the 5th link 8 are arrange | positioned on the same plane. The fourth link 7 as an armrest receiver is disposed outside the first link 2.

  Hereinafter, the operation of the standing assistance chair according to the present embodiment configured as described above will be described. 1 (b) and 2 (b) are side views showing the stand-up auxiliary chair in a state where the seat is lifted halfway, and FIG. 6 is a diagram showing the link device of FIG. 1 (b). 7 is a perspective view of FIG.

  In FIGS. 1B, 2B, 6 and 7, when the start switch (not shown) of the motor 18 (see FIG. 2B) for driving the electric actuator 12 is turned on, the electric actuator 12 movable rods 12a advance, and thereby the connecting member 14 is lifted, and the distance between the base body 1c of the base 1 and the fourth link 7 is as shown in FIGS. 1 (a) and 2 (a). Compared to larger. At this time, as the upper end of the first link 2 rises, the fourth link 7 rises and the fifth link 8 rises along the vertical line. As the fifth link 8 rises in this way, the rear side end portion of the fourth link 7 rises in synchronization with the front side end portion, and the fourth link 7 and the armrest 20 fixed thereto are horizontal. Is preserved.

  1 (c) and 2 (c) show the state of the auxiliary chair for standing up when the movable rod 12a of the electric actuator 12 is further advanced to raise the seat portion 3 obliquely forward and the seated person is about to stand up. FIG. 8 is a diagram illustrating the link mechanism of FIG. 1C, and FIG. 9 is a perspective view of FIG.

  1C, FIG. 2C, FIG. 8 and FIG. 9, the link mechanism formed on the base 1 is the same as in FIGS. When the movable rod 12a of the electric actuator 12 advances almost 100%, the connecting member 14 (see FIG. 9) laid between the upper ends of the first link 2 is pushed up to the upper end point, and the upper end of the second link 4 And the distance between the upper ends of the first links 2 is reduced, and accordingly, the chair rear side of the fixed link 9 is pushed up by the third link 6, and the seat portion 3 rises while being inclined obliquely forward.

  At this time, the 5th link 8 inclines to the chair rear part side compared with the normal position of Drawing 1 (a) (refer to Drawing 8), and, as a result, the back end of 4th link 7 rises synchronizing with the front end. Accordingly, the armrest 20 (not shown in the figure) fixed to the fourth link 7 rises obliquely forward while maintaining a horizontal state without tilting forward, and the seated person maintains the horizontal state while the hips are lifted forward. It is possible to stand up easily by placing a hand on the armrest 20 as it is.

  According to the present embodiment, the first link mechanism includes a rail 5 provided to be inclined forward in a rear portion of the base, and an upper end portion rotatably connected to a front portion of the seat portion 3, and a lower end portion of the first link mechanism A first link 2 engaged with the rail 5 to be rotatable and movable along the rail 5, and a first link 2 rotatably connected to the first link 2 at an intermediate portion thereof. A second link 4 rotatably connected, and a third link 6 having an upper end rotatably connected to the rear portion of the seat 3 and a lower end rotatably connected to the upper end of the second link 4. And the second link mechanism is attached to the armrest 20 and one end is rotatably connected to the upper end of the first link 2, and the upper end is the fourth link 7. The other end is rotatably connected and the lower end is rotatable to the upper end of the second link 4 By having the fifth link connected to the frame, it is possible to ensure the rigidity of the entire apparatus, and with a relatively simple structure, the moving portion is widened and the seat portion 3 is raised while being inclined obliquely forward. be able to. Therefore, there are few design restrictions.

  Moreover, the fourth link 7 can be raised or lowered while maintaining the horizontal state by the link mechanism, so that the armrest 20 fixed to the fourth link 7 does not tilt forward like the seat portion 3. Can move up and down almost horizontally. As a result, a seated person trying to stand up can easily stand up while holding his / her hand on the armrest and supporting the body.

  10 to 12 are explanatory views showing a standing assistance chair according to the second embodiment of the present invention. In this stand-up auxiliary chair, the stand-up auxiliary chair of the first embodiment is provided with a footrest 29 and a reclining mechanism for the backrest 21, and is interlocked with the footrest 29.

  FIG. 10 is a side view showing a normal state (sitting state), FIG. 11 is a side view showing a state in which the reclining mechanism is operated, and FIG. 12 is a side view showing a state in which the seat is raised while being tilted forward. is there.

  In FIG. 10, the backrest 21 is rotatably installed via a shaft 24 that is an intersection of the backrest 21 and the seat portion 3. Further, a footrest 29 is rotatably provided at the front end portion of the seat portion 3 via an attachment link 30.

  11 and 12, the back actuator 16 is fixed along the length direction of the fixed link 9, and the distal end portion of the movable rod 16 a is connected to the lower portion of the backrest 21 at the first link 25. It is connected to the other end side of this through a pivot shaft 22a. In addition, one end of the seventh link 26 is rotatably connected to the distal end side of the sixth link 25 from the pivot 22a via the pivot 22b, and the other end of the seventh link 26 is pivoted via the pivot 22c. One end of the bent eighth link 27 is rotatably connected. One end of a ninth link 28 is rotatably connected to the other end of the eighth link 27 via a pivot 22d, and the back surface of the footrest 29 is connected to the other end of the ninth link 28 via a pivot 22e. It is connected rotatably.

  Thus, the sixth link 25 connected to the lower portion of the backrest 21 and the seventh link 26 disposed below the seat portion 3 and connecting the end of the sixth link 25 and the back surface of the footrest 29, The eighth link 27 and the ninth link 28 are formed so that the reclining mechanism of the backrest 21 and the lifting mechanism of the footrest 29 are interlocked.

  Next, operation | movement of the standing assistance chair which concerns on 2nd Embodiment of such a structure is demonstrated.

  In a normal state, when the movable rod 16a of the back actuator 16 (see FIG. 12) advances, the backrest 21 rises with respect to the seat portion 3, and when the movable rod 16a of the back actuator 16 retracts, The backrest 21 falls down.

  11 and 12, when the movable rod 16a of the back actuator 16 is retracted, the pivot 22b of the sixth link 25 connected to the lower part of the backrest 21 is pulled to the front side of the chair. Rotate to fall down. At this time, the seventh link 26 connected to the sixth link 25 via the pivot 22b is pulled to the left in FIG. 11, and the eighth link 27 partially pivoted on the back surface of the seat portion 3 is rotated. , Raise its left end. As the left end of the eighth link 27 rises, the ninth link 28 is pushed leftward in FIG. 11, thereby lifting the footrest 29 to the same plane as the seat portion 3. Thereby, the backrest 21, the seat part 3, and the footrest 29 are arranged in a plane and form a bed state.

  Since the structure of the raising / lowering mechanism of the seat part and armrest in this embodiment is the same as that of 1st Embodiment and there exists the same effect, it attaches | subjects the same code | symbol and abbreviate | omits description.

  According to this embodiment, the seat part 3 has the backrest 21 and the footrest 29, and the seat occupant is provided as necessary by providing the backrest reclining mechanism and interlocking the reclining mechanism with the footrest 29. The backrest 21 and the footrest 29 can be rotated to rest in the form of a bed.

  In the present embodiment, it is preferable to apply braking so that the rising operation can be performed only when the backrest 21 and the footrest 29 are in the steady positions.

  FIG. 13 is an explanatory view showing a standing assistance chair according to the third embodiment of the present invention. This stand-up auxiliary chair is arranged so that the electric actuator 12 in the first embodiment is spanned between the front ends of the first link 2 and the second link 4.

  Next, operation | movement of the standing assistance chair of this embodiment of such a structure is demonstrated. When the electric actuator 12 is activated and the movable rod 12a is retracted, the distance between the upper ends of the second link 4 and the first link 2 is narrowed, whereby the upper ends of the first link 2 and the second link 4 are reduced. It raises and the seat part 3 is lifted. At this time, the action of the third link 6 raises the rear side of the seat portion 3 from the front side, and the seat portion 3 rises while inclining forward.

  Since the 4th link 7 is maintaining substantially horizontal like 1st Embodiment mentioned above, the armrest 20 raises maintaining a horizontal state.

  On the other hand, when the movable rod 12a is advanced, the interval between the upper ends of the second link 4 and the first link 2 is widened, and the upper ends of the first link 2 and the second link 4 are both lowered. At this time, the seat portion 3 is lowered while receiving the action of the third link 6 and returning the forward inclined state to the original state. The armrest 20 descends while maintaining a horizontal state.

  In the present embodiment, the configuration other than the above-described parts is the same as that of the first embodiment and exhibits the same operational effects, so that the same reference numerals are given and description thereof is omitted.

  According to the present embodiment, the electric actuator 12 is arranged so as to span between the distal ends of the second link 4 and the first link 2, so that it can move with a relatively simple structure as in the first embodiment. Since the seat portion 3 can be lifted while tilting forward and the armrest 20 can be lifted while maintaining a horizontal state, the seated person can stand up easily without difficulty while supporting the armrest 20 with his / her hand. be able to.

  In addition, since the ascending / descending path of the chair is regulated by the link, there is a degree of freedom in the mounting position of the actuator as the drive source. Therefore, the electric actuator 12 can be provided between the tip portions of the first and second link members 2 and 4 as in the present embodiment.

  FIG. 14 is a side view showing a fourth embodiment of the present invention. This stand-up auxiliary chair is obtained by changing the attachment position of the fifth link 8 in the first embodiment. That is, the upper end portion of the fifth link 8 is connected to the chair front side of the fourth link 7 via the pivot 17f, and the lower end portion is pivoted to the upper side of the connecting portion of the first link 2 with the second link 4. It is rotatably attached via 17g, and the chair rear portion side of the fourth link 7 is rotatably attached to the upper side of the connecting portion of the second link 4 with the first link 2 via a pivot 17e. .

  Hereinafter, the operation of the standing assistance chair of this embodiment having such a configuration will be described. When the electric actuator 12 is activated and the movable rod 12a is advanced, the upper ends of the first link 2 and the second link 4 are raised and the seat 3 is lifted. At this time, the action of the third link 6 raises the rear side of the seat portion 3 from the front side, and the seat portion 3 rises while inclining forward.

  The fourth link 7 connected to the upper end of the second link 4 rises due to the action of the second link 4, but the front end of the fourth link 7 becomes the upper end of the first link 2 by the fifth link 8. Since it is connected so that rotation is possible, the front side edge part of the 4th link 7 rises synchronizing with the rear side edge part. Therefore, the armrest 20 fixed to the fourth link 7 moves up while maintaining a horizontal state.

  On the other hand, when the movable rod 12a is retracted, the upper ends of the first link 2 and the second link 4 are both lowered. At this time, the seat portion 3 is lowered while receiving the action of the third link 6 and returning the forward inclined state to the original state. The front end portion of the fourth link 7 receives the action of the fifth link 8 and descends in synchronization with the rear end portion, whereby the armrest (not shown) descends while maintaining a horizontal state.

  According to the present embodiment, as in the first embodiment, the seat can be lifted while being inclined obliquely forward, and the armrest can be lifted while maintaining a parallel state. Therefore, the user can easily stand up by placing a hand on the armrest.

  In the present embodiment, a plurality of connection holes 19 between the first link 2 and the second link 4 in the first link mechanism are provided. Thereby, the position of the pivot 11 that is the connection position of the first link 2 and the second link 4 can be changed, and thereby the raising / lowering width of the seat portion 3 and the armrest can be adjusted.

  The inclination angle of the rail 5 in the first link mechanism, the connection position between the upper end portion of the third link 6 and the rear portion of the seat portion 3, or the connection position between the lower end portion of the third link 6 and the upper end portion of the second link 4 are changed. By doing so, the same effect as that obtained when the position of the pivot 11 is changed can be obtained. Therefore, in the present embodiment, the connection position between the first link 2 and the second link 4 in the first link mechanism, the inclination angle of the rail 5, the connection position between the upper end portion of the third link 6 and the rear portion of the seat portion 3. It is preferable that at least one of the connecting positions of the lower end of the third link 6 and the upper end of the second link 4 is changeable.

  In the present embodiment, configurations other than those described above are the same as those in the first embodiment and have the same operational effects.

  FIG. 15: is a side view of the stand-up auxiliary chair which concerns on 5th Embodiment in this invention. This stand-up auxiliary chair is provided with a caster 31 on the back surface of the base bottom plate 1a of the base 1, and the rest of the configuration is the same as that of the first embodiment and has the same function. A description thereof will be omitted.

  The caster 31 is attached to the back surface of the base bottom plate 1a, thereby improving the transportability. By providing the height adjuster (not shown), the base can be horizontally adjusted.

  In the present embodiment, the casters 31 can be provided at the four corners of the base bottom plate 1a. However, the casters 31 may be provided only at two places on the rear side, and normal wheels may be provided at two places on the front side. Further, an adjuster for height adjustment can be provided between the caster 31 and the base bottom plate 1a or directly on the base bottom surface 1a. Thereby, the horizontal adjustment of the base 1 becomes possible.

  16 and 17 are side views showing a link mechanism of a stand-up auxiliary chair according to a sixth embodiment of the present invention, and FIG. 16 is a view showing a state where a seat (not shown) is in a normal position. FIG. 4 is a view showing a state where the seat is lifted to the highest position.

  In FIG.16 and FIG.17, the rail member 5 shorter than this base main body 1c is being fixed to the rear part of the base main body 1c so that it may incline ahead.

  On the other hand, the upper end of the first link 2 is rotatably connected to the front end of the fixed link 9 fixed to the back surface of the seat 3 (not shown) via the pivot 17a. The portion is engaged with a rail member 5 fixed to the base body 1 c so as to be rotatable and movable in the length direction of the rail member 5.

  The first link 2 is provided with a second link 4 so as to be rotatable through a pivot 11 in the middle thereof, and the lower end of the second link 4 is pivoted to a longitudinal member 1b on the front side of the base 1. It is rotatably connected via 17b.

  A protrusion 33 is provided at the upper end portion of the second link 4, and this protrusion 33 is engaged with a slide long hole 32 provided along the length direction of the rear end of the fixed link 9. It is connected. Accordingly, the upper end portion of the second link 4 is locked to the rear end of the fixed link 9 so as to be rotatable and parallel movable.

  One end of the fourth link 7 is rotatably connected to the upper end portion of the first link 2 via a pivot 17e, and one end of the fifth link 8 is connected to the other end of the fourth link 7 via a pivot 17f. It is connected rotatably. The other end of the fifth link 8 is rotatably connected via a pivot shaft 17g below the connecting portion of the second link 4 to the fixed link 9. With such a link mechanism, the fourth link 7 is provided so as to be substantially horizontal.

  As in the first embodiment, a pair of left and right vertical members 1b on the rear side of the base 1 are provided, and a fixed side end of the actuator 12 is fixed to an equipment frame that interconnects the vertical members 1b. The movable rod 12a of the actuator 12 is rotatably connected via a protruding piece 15 to a connecting member that connects the front side ends of the fixed links 9 on both the left and right sides. The connecting portion between the protruding piece 15 and the connecting member 14 is also rotatable.

  In other words, the stand-up auxiliary chair of the present embodiment eliminates the third link of the first link mechanism in the stand-up auxiliary chair according to the first embodiment of FIG. 3 and slides along the length direction of the rear portion of the fixed link 9. A long hole 32 is provided, and a protrusion 33 that engages with the slide long hole 32 is provided at the upper end of the second link 4, and the protrusion 33 is assembled to engage with the slide long hole 32 of the fixed link 9. It is a thing.

  Below, operation | movement of the stand-up auxiliary chair of this embodiment comprised as mentioned above is demonstrated.

  When the movable rod 12a of the actuator 12 advances, the upper end portion of the first link 2 is pushed upward, and accordingly, the upper end portion of the second link 4 rotatably connected to the first link 2 and its intermediate portion. The projection 33 of the fixed link 9 translates in the sliding long hole 32 of the fixed link 9 diagonally in the lower left direction in the drawing to raise the rear end side of the fixed link 9 (see FIG. 17). As a result, the seat 3 (not shown) rises while tilting obliquely forward.

  Since the configuration other than the above is the same as that of the first embodiment and has the same effects, the same reference numerals are given and the description thereof is omitted.

  According to the present embodiment, even if the third link is omitted and the link mechanism is simplified, as in the first embodiment, the seat portion is moved up and down while being inclined obliquely forward and the armrest is moved up and down substantially horizontally. Can do.

  The stand-up auxiliary chair according to the present invention, which has a simple structure and can be lifted up and down while the seat portion is tilted forward and the armrest can be moved up and down horizontally, is useful in hospitals and other facilities, particularly in nursing facilities.

It is a side view explaining the mechanism which concerns on 1st Embodiment of this invention, FIG. 1 (a) is a figure which shows a normal state, FIG.1 (b) is a figure which shows the state which raised the seat part to the middle, FIG. (C) It is a figure which shows the state which the seat part raised to the highest position. It is the figure which abbreviate | omitted the 2nd link mechanism corresponding to FIG. It is a figure which shows the link mechanism of Fig.1 (a). FIG. 4 is a perspective view of FIG. 3. FIG. 4 is a perspective view of another angle of FIG. 3. It is a figure which shows the link mechanism of FIG.1 (b). FIG. 7 is a perspective view of FIG. 6. It is a figure which shows the link mechanism of FIG.1 (c). It is a perspective view of FIG. It is a side view of the stand-up auxiliary chair which concerns on 2nd Embodiment of this invention. It is a side view which shows the state which acted the reclining mechanism of FIG. It is explanatory drawing which shows the state which raised the seat part of the stand-up auxiliary chair of FIG. It is a side view of the stand-up auxiliary chair which concerns on 3rd Embodiment of this invention. It is a side view of the stand-up auxiliary chair which concerns on 4th Embodiment of this invention. It is a side view of the stand-up auxiliary chair which concerns on 5th Embodiment of this invention. It is a side view which shows the link part of the stand-up auxiliary chair which concerns on 6th Embodiment of this invention. It is a side view which shows the link part of the stand-up auxiliary chair which concerns on 6th Embodiment of this invention. It is a side view which shows a prior art.

Explanation of symbols

1: Base 1a: Base bottom plate 1b: Vertical member 1c: Base body 2: First link 3: Seat part 4: Second link 4a: Protruding part 5: Rail member 6: Third link 6a: Protruding part 7 : Fourth link 8: Fifth link 9: Fixed link 10a, 10b: Fixed member 11: Pivot 12: Electric actuator 12a: Movable rod 13: Equipment frame 14: Connecting member 15: Projection piece 16: Back actuator 16a: Movable Rod 17a: Axis 17b: Axis 17c: Axis 17d: Axis 17e: Axis 17f: Axis 17g: Axis 18: Motor 19: Connection hole 20: Armrest 21: Backrest 22a: Axis 22b: Axis 22c: Axis 22d: Axis 22e: Pivot 23: Armrest mounting member 24: Shaft 25: Sixth link member 26: Seventh link member 27: Eighth link member 28: Ninth link member 29: F Trest 30: Mounting link 31: Caster 32: Sliding long hole 33: Protrusion 101: Cushion 102: Backrest 105: Left and right side plates 106: Fixed side front seat surface 107: Exercise side rear seat surface 110: Armrest support base material 111: Armrest 115: Back bearing surface support base material 118: First link 120: Second link 123: Third link 125: Motor actuator 128: Actuating rod

Claims (9)

  A base, a seat, a first link mechanism for raising and lowering the seat relative to the base, an armrest, and a second link mechanism for raising and lowering the armrest in alignment with the raising and lowering of the seat And an actuator that advances or retracts the front portion of the seat relative to the rear portion of the base, and the first link mechanism includes a rail provided in the rear portion of the base, and an upper end. A first link whose portion is rotatably connected to the front portion of the seat portion and whose lower end is rotatably connected to the rail and movable along the rail, and the first link is rotatable at an intermediate portion thereof A second link having a lower end rotatably connected to a front portion of the base, and an upper end rotatably connected to a rear portion of the seat, and a lower end being an upper end of the second link. 3rd link connected rotatably The second link mechanism includes a fourth link having the armrest attached thereto and one end portion rotatably connected to the upper end portion of the first link, and an upper end portion of the fourth link. A stand-up assisting chair having a fifth link rotatably connected to the other end and a lower link rotatably connected to an upper end of the second link.   A base, a seat, a first link mechanism for raising and lowering the seat relative to the base, an armrest, and a second link mechanism for raising and lowering the armrest in alignment with the raising and lowering of the seat And an actuator that advances or retracts the front portion of the seat relative to the rear portion of the base, and the first link mechanism includes a rail provided in the rear portion of the base, and an upper end. A first link whose portion is rotatably connected to the front portion of the seat portion and whose lower end is rotatably connected to the rail and movable along the rail, and the first link is rotatable at an intermediate portion thereof A second link that is connected to the front portion of the base so as to be rotatable, and the upper end is engaged with the rear portion of the seat so as to be rotatable and movable in the front-rear direction of the seat. The second link mechanism has a front A fourth link having an armrest attached and one end rotatably connected to the upper end of the first link, and an upper end rotatably connected to the other end of the fourth link, and a lower end of the fourth link A stand-up auxiliary chair comprising a fifth link rotatably connected to a lower portion of a connecting portion of the second link with the seat portion.   The stand-up assistance chair according to claim 1 or 2, wherein the armrest is fixed to the fourth link so as to be detachable.   The second link mechanism includes a fourth link having the armrest attached and one end rotatably connected to the upper end of the second link, and the upper end rotated to the other end of the fourth link. The start-up assist according to any one of claims 1 to 3, further comprising a fifth link rotatably connected to the upper end of the first link. Chair.   The stand-up auxiliary chair according to any one of claims 1 to 4, wherein the seat portion includes a backrest and a backrest reclining mechanism is provided.   6. The stand-up auxiliary chair according to claim 5, wherein the seat has a footrest, and the footrest is interlocked with a reclining mechanism of the backrest.   The stand-up auxiliary chair according to any one of claims 1 to 6, wherein a caster or an adjuster for height adjustment is provided on a bottom surface of the base.   The connection position of the first link and the second link in the first link mechanism, the inclination angle of the rail provided at the rear part of the base with respect to the base, the third link upper end part and the rear part of the seat part 8. At least one of the connecting position of the second link and the connecting position of the lower end portion of the third link and the upper end portion of the second link is provided so as to be changeable. A stand-up auxiliary chair according to item.   The connecting position of the first link and the second link in the first link mechanism or the inclination angle of the rail provided at the rear portion of the base with respect to the base is changeable. The stand-up auxiliary chair according to any one of 1 to 7.

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