JP2003061775A - Liftable chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liftable chair that helps a user easily transfer thereto from a bed, another chair or the like and facilitates a change of the direction of the body so as to do work in a right or left surrounding area while sitting on the chair. SOLUTION: The liftable chair has a seat unit 1 that is lifted and lowered with a lift driving mechanism L. The seat unit 1 of the liftable chair has a seat 2 that can freely swing to the right and left at a swing angle of 45 to 90 degrees around a near center when seen from above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift chair having a seat portion that moves up and down.

[0002]

2. Description of the Related Art Conventionally, in a lift chair having a seat portion that is lifted and lowered by a lift drive mechanism, the seat portion is only moved up and down.

[0003]

In the case of the conventional lift chair, there is no particular problem with the movement of a physically handicapped person standing up from the chair forward or sitting on the lift chair from the front of the chair.
When sitting from the left and right sides of the lift chair or diagonally to the front left and right, the person has to sit down on the seat once and then sit down on the seat again to turn the body to the front. There is. Further, there is a problem in that the body cannot be easily turned to the left and right in the sitting state, and it is difficult to work around the sitting state.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an elevating chair which can be easily transferred from a side bed or another chair or the like and whose body direction can be freely changed so that the work around the left and right can be easily performed even when sitting. And

[0005]

In order to achieve the above object, an elevator chair according to the present invention is an elevator chair including a seat unit that is elevated and lowered by an elevator drive mechanism. When viewed in a plan view, it has a seat portion which can swing freely at left and right swinging angles of 45 ° to 90 ° centering on a substantially central portion.

Further, in an elevator chair provided with a seat unit which is moved up and down by a lift drive mechanism, the seat unit includes a seat frame and a seat, and the seat is viewed in plan. It is pivotally supported by the seat frame so that it can be swung at a swing angle of 45 ° to 90 ° to the left and right about the substantially central portion.
The seat portion is configured to be stopped by the position restricting means in the front front direction, the maximum left swing, and the maximum right swing.

A plastic shaft support member is provided at a pivotal support position between the seat portion and the seat portion frame body, and a sliding bearing is provided between the back surface of the seat portion and the top surface of the seat portion frame body. The members are arranged in a scattered manner in a plan view to support the seat portion. Further, the swing angle is set to 60 ° to 80 °. In addition, an armrest arm is disposed at the upper left and right positions of the seat unit so as to be switchable between a horizontal use state and an upper nonuse state.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the illustrated embodiments.

FIG. 1 shows an elevator chair according to the present invention. First, the basic structure of the entire elevator chair will be described. In addition, the direction to sit on the lift chair (Fig. 1
The right side of FIG. 1 is referred to as the front side, and the other side (the left side of FIG. 1) is referred to as the rear side. As shown in the side view of FIG. 1, this lifting chair is provided with a substantially horizontal plane seat unit 1 on which a person (weak person) sits.
And the back portion 8 that is inclined rearward to the rear position of the seat unit 1
And a frame-shaped (gate-shaped) support body 10 at the rear of the back 8.
And a lift drive mechanism L for moving the seat unit 1 and the back 8 up and down along the support body 10.

At the lower position of the support body 10, support arms 11 and 11 projecting forward from the left and right sides of the support body 10 and the opposite side (support body) are provided for maintaining the posture of the entire lifting chair. Rollers 12, 12 are provided on the left and right rear sides of the section 10. The rollers 12 and 12 maintain the posture of the lifting chair and facilitate the transportation of the lifting chair.

As shown in the plan view of the seat unit 1 of FIG. 2, the seat unit 1 includes a seat frame body 3 and a seat 2, and the seat 2 is centered on a substantially central portion when viewed two-dimensionally. As left and right respectively
Seat frame 3 that can swing freely at a swing angle θ of 45 ° to 90 °
Is pivoted to. Note that the solid line in FIG. 2 shows the state in which the seat portion 2 is rotated leftward from the front direction by the swing angle θ (arrow A), and the two-dot chain line shows the state in which the seat portion 2 is facing forward. .

The swing mechanism of the seat portion 2 will be described in detail below. As shown in the bottom view of the seat 2 in FIG. 3, the seat 2 has a seat main body 13 on which a person actually sits, and a lower surface (back surface) of the seat main body 13 is parallel to the seat main body 13. A flat plate seat swing plate 14 made of metal and fixed with screws or the like.
As shown in the side sectional view of the seat unit 1 in FIG. 4, a metal support shaft 15 protruding vertically downward is provided at a substantially central portion of the seat swing plate 14, and a tip of the support shaft 15 is provided. The shaft support member 5 made of plastic is arranged in the section. The plastic shaft support member 5 is a short columnar body fixed to the tip of the support shaft 15 and smoothly slidingly contacting the inner peripheral surface of the bearing 16 of the seat frame 3 described later. Has a frusto-conical shape whose diameter decreases in the tip direction, and a horizontal shaft tip surface is formed on the tip surface.

Next, the seat frame 3 for pivotally supporting the support shaft 15 (the plastic shaft support member 5) of the seat 2 will be described. As shown in FIG. 2, the seat frame 3 is a rectangular frame in plan view, and as shown in the plan views of the seat frame 3 in FIGS. The body 3 has a bearing 16 which rotatably holds the support shaft 15. The inner peripheral surface of the bearing 16 is in sliding contact with the outer peripheral surface of the plastic shaft support member 5, and supports (holds) the support shaft 15 so as not to wobble. Further, as shown in FIG. 4, the bearing 16 has a concave hole to form a horizontal sliding contact surface at the bottom, and the shaft tip end surface of the support shaft 15 is slidably contacted with the sliding contact surface of the bearing 16. Good.

Further, as shown in FIG. 5, a plurality of slide receiving members 6 ... Are arranged in a scattered manner on the upper surface plate 17 of the seat frame 3. More specifically, the slide receiving member 6 is arranged in the peripheral portion of the seat frame 3 so as to surround the bearing 16 in plan view. The slide receiving member 6 is made of a plastic disc, and is attached to the upper surface plate 17 (uppermost surface) of the seat frame 3 so as to be convex, as shown in FIG. The upper surfaces are set to be arranged on the same horizontal plane.

As shown in FIG. 4, the upper surface side of the slide receiving members 6 comes into contact with the seat swing plate 14 of the seat 2, and when a downward load is applied to the seat 2 ( When a person sits down), the slide receiving members 6 ... Can support the load. The upper surface (sliding contact surface) of the plastic slide receiving member 6 is in contact with the metal seat swing plate 14 of the seat 2 at a plurality of points (small circles). Therefore, the entire seat portion 2 is supported by the sliding receiving member 6 made of plastic in the shape of dots between the seat sliding plate 14 on the back surface of the seat portion 2 and the upper surface plate 17 of the seat frame body 3, and the seat portion 2 is supported. The shaft support member 5 made of plastic for smoothly rotating the seat portion 2 to the pivot position of the seat so as not to rattle.
Since the seat 2 is provided, the seat 2 can be easily swung (rotated) even when a load is applied to the seat 2.
In the present invention, the eight slide receiving members 6 are provided, but the number, arrangement, and size of the sliding receiving members 6 can be freely set so that the seat portion 2 does not become unstable.

As shown in FIG. 2, the left and right swing angles θ of the seat portion 2 with respect to the seat portion frame body 3 make it easy for a person to transfer to the seat portion 2, so that the seat portion 2 is seen in a plan view. , 45 ° to 90 ° to the left and right around the center point C (center line of the support shaft 15) that pivotally supports the seat 2 in the substantially central portion, but the swing angle θ is 60 ° to It is particularly preferable to set it at 80 °. When the swing angle θ is less than 60 °, the advantage of the swing function of the seat portion 2 that facilitates getting on and off the seat portion 2 becomes poor, and the swing angle θ is set to 80
If the angle is larger than 0 °, there is a risk of accidentally pinching a finger between the connecting arm portion 18 of the seat portion frame body 3 at the rear position of the seat portion 2 and the swinging seat portion 2, which is dangerous. . That is, when the maximum swing angle θ is set to 80 °, as shown in FIG. 2, between the side surface portion of the seat portion 2 when the seat portion 2 is swung and the connecting arm portion 18 behind the seat portion 2. Can secure the space portion 19.

The lifting chair is provided with position regulating means 4 for regulating the swinging angle θ of the seat 2. The position restricting means 4 is configured to stop (position control) the seat portion 2 in the front front direction, the left maximum swing, and the right maximum swing. FIG. 6A is a bottom view of the seat unit 1 with the seat 2 facing forward and front, and FIG. 6B is a bottom view of the seat 2 stopped in the state of maximum right swing. Is. When the seat portion 2 shown in FIG. 6A faces the front and the front, the center line (dashed line) of the seat portion 2 and the seat frame 3 coincides with each other, and the center line (dashed line) is the reference line K. Will be called.

The position restricting means 4 will be described in detail. As shown in FIGS. 3 and 4, a vertical leg 21 is projected from the seat swing plate 14 of the seat 2, and the middle portion of the leg 21 ( Alternatively, a positioning tool 20 is provided at the rear end of the seat 2 at a predetermined distance from the center of swing of the seat 2. Positioning tool 20 (leg 21)
As shown in FIG. 6A, the installation position of is set on the reference line K when the seat portion 2 is in the front and front direction.
As shown in FIG. 4, the positioning tool 20 has a compression coil spring 25 and a position holding ball 26 at its tip, and the spring 25 urges the ball 26 in a direction to push it forward.

Further, as shown in FIG. 5, the upper surface plate 17 of the seat frame 3 has a positioning tool centered around the swing center of the seat 2.
An arc-shaped cutout hole 22 is provided in which 20 (legs 21) are arranged and whose radius is approximately the predetermined size. Then, the reference line K in FIG.
The V notch groove 24 is provided at a predetermined position on the back surface of the seat frame body 3 above.
The position holding plate 23 formed with is arranged. Then, the positioning tool 20 (leg 21) is allowed to swing in the notch hole 22 as the seat 2 swings.

First, as shown in FIG. 6 (a), the front position regulation for stopping the seat portion 2 toward the front is as follows.
The position holding balls 26 of 20 are fitted into the V notch groove 24 of the position holding plate 23 (by the pressing force of the spring 25), and the seat portion 2
The position of the seat frame 3 can be maintained so as not to rotate with respect to the seat frame 3. Then, to release this front facing direction, the spring 25
This can be done by rotating the seat portion 2 so as to overcome the pressing force of the ball 26 and cause the ball 26 to escape from the V notch groove 24.

Next, in the left and right maximum swinging states, the left and right position regulation for stopping the seat portion 2 is performed as shown in FIG. To
This is performed by abutting on rubber stoppers 28, 28 provided near both ends of the notch hole 22 (left and right positions). That is,
As shown in FIG. 6B, when the seat portion 2 swings to the left or right, the contact portion 27 of the positioning tool 20 abuts on the rubber stopper 28, and the seat portion 2 exceeds the angle beyond that. The position is regulated so that it does not rotate.

Next, the lifting drive mechanism L for lifting the seat unit 1 will be described. As shown in the side view of FIG. 1 and the front view of FIG. 2, the lifting drive mechanism L includes a lifting member 30 that moves up and down along a guide rail (not shown) provided on the support body 10, and a lifting member 30 And a screw type lifting device (31). Although not shown, the elevating member 30 includes a guide roller, and the elevating member 30 is provided by the guide roller.
Is for smoothly moving up and down the guide rail so that it does not rattle.

The screw type lifting device 31 includes a male screw rod 32 standing upright in the vertical direction of the seat 2, a female screw block 33 screwed to the male screw rod 32, and a male screw rod 32 around the axis thereof. It has a rotation driving means (not shown) such as a motor for rotating the motor.
An elevating member 30 is attached to the female screw block 33 to restrain the rotation (rotation) of the female screw block 33. Then, the male screw rod 32 is normally and reversely rotated (rotated) through a speed reducer (not shown) by the rotation driving means, and the elevating member 30 together with the female screw block 33.
Move up and down. Therefore, as shown in FIG. 1, the seat unit 1 (the connecting arm portion 18) is attached to the elevating member 30, and the seat unit 1 can be moved up and down by the elevating drive mechanism L.

The operation of raising and lowering the seat portion 2 can be performed by vertically swinging an operating lever 35 provided at the tip of the armrest arm 7 shown in FIG. The operation lever 35 serves as an electrical changeover switch, and can be moved up and down by a forward / reverse rotation operation of the male screw rod 32 by a rotation driving means such as a motor of the screw type elevating device 31. Further, the type of the elevating and lowering drive mechanism L for elevating and lowering the seat portion unit 1 is not limited to the above-mentioned screw type, but may be other types. For example, although not shown, a flexible belt may be attached to the seat unit and the flexible belt may be pulled up (suspended) by a telescopic actuator. Further, since the back part 8 is attached to the elevating member 30, it moves up and down as the seat unit 1 moves up and down.

Next, the armrest arm 7 is connected to the elevating member 30 at a position above and below the seat unit 1 as shown in FIG. Therefore, the armrest arm 7 moves up and down as the seat unit 1 moves up and down, and is attached so as to be switchable between a horizontal use state and an upper nonuse state (vertical direction). Further, when the seat portion 2 is used, as shown in FIG. 1, the seat portion 2 is held in a horizontal state by the connecting arm portion 18, but the seat portion 2 and the seat portion frame body 3 are The pivoting portion of the frame body 3 on the side of the base end portion 36 with respect to the connecting arm portion 18 is configured to be able to be folded upward, so that the elevator chair can be made compact when not in use.

As shown in FIG. 1, a safety bar 38 is provided on the lower surface side of the seat unit 1. This safety bar 38
Is pivotally mounted at a rear position of the seat unit 1 so as to be swingable at a small angle, and is safe when a leg is caught under the seat unit 1 while the seat unit 1 is being lowered. A leg comes into contact with the bar 38 to swing the safety bar 38, and the swing causes the limit switch to be provided on the lower surface of the seat unit 1 (not shown).
Is activated, the operation of the elevating and lowering drive mechanism L can be electrically interrupted to stop the descent.

[0027]

The present invention has the following effects due to the above configuration.

By swinging the seat portion 2 in the left-right direction (according to claim 1), it is easy to sit on the bed or other chairs in the left-right direction or in the diagonally forward direction, and to separate from the seat portion 2. Is also easy. For example, it is easy to get in and out of the kotatsu. Further, even when the user sits on the seat portion 2, the direction of the body can be easily changed freely, so that the work around the left and right can be easily performed. In plan view, the area of the seat portion can be made as small as the size of the ordinary seat portion 2, and the space for the entire lifting chair can be saved.

(According to the second aspect) The seat portion 2 can be stopped and the position thereof can be restricted when the head is turned to the front and the maximum right and left swinging, and the seat portion 2 is not rotated unnecessarily, which is safe.

(According to the third aspect) Since the swing of the seat portion 2 is smooth and the swing does not fluctuate, it is possible to change the direction of the body safely and easily even when a person sits down. be able to.

(According to claim 4) There is no loss of ease of getting on and off a person due to the swinging of the seat portion 2, and when the seat is swung to the left and right, a fixed portion at the rear position of the seat portion 2 Since there is a gap between the seat portion 2 that has been swung, it can be safely used without accidentally pinching a finger.

(According to the fifth aspect) By disposing the armrest arm 7 in the upper non-use state, when the seat portion 2 is swung, the seating on the seat portion 2 and the operation of separating from the seat portion 2 are further performed. It will be easy. Further, by setting the armrest arm 7 in the downward use state, a seated person can use the armrest arm 7 and can enhance the function as a chair.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an elevator chair according to the present invention.

FIG. 2 is a plan view of a seat unit.

FIG. 3 is a bottom view of the seat portion.

FIG. 4 is a side sectional view of a seat unit.

FIG. 5 is a plan view of a seat frame.

FIG. 6 is a plan view illustrating a swinging state of a seat portion.

FIG. 7 is a partially cutaway front view showing the embodiment of the lifting chair.

[Explanation of symbols]

1 seat unit 2 seats 3 Seat frame 4 Position control means 5 axis support member 6 Slide receiving member 7 Arms for armrests L lifting drive mechanism θ swing angle

Claims (5)

[Claims] 1. A lift chair having a seat unit (1) that moves up and down by a lift drive mechanism (L).
However, when viewed two-dimensionally, 45 ° to the left and right around the center
An elevating chair characterized by having a seat portion 2 which can swing freely at a swing angle θ of up to 90 °. 2. A lift chair including a seat unit 1 that is lifted and lowered by a lift drive mechanism L, wherein the seat unit 1 includes a seat frame 3 and a seat 2, and the seat 2 is When viewed in plan, the seat frame 2 is pivotally supported on the seat frame body 3 so as to be swingable at right and left swing angles θ of 45 ° to 90 ° about the center, and the seat 2 is An elevating chair characterized in that it is configured to be stopped by the position restricting means 4 in each state of front facing, maximum left swing, and right maximum swing. 3. A plastic shaft support member 5 is provided at a pivotal position between the seat portion 2 and the seat portion frame body 3, and the back surface of the seat portion 2 and the top surface of the seat portion frame body 3 are connected. The lift chair according to claim 2, wherein the slide receiving members 6 are arranged in a scattered manner in a plan view to support the seat portion 2. 4. The lift chair according to claim 1, wherein the swing angle θ is set to 60 ° to 80 °. 5. At the left and right upper positions of the seat unit 1,
The lift chair according to claim 1, 2, 3 or 4, wherein the armrest arm 7 is arranged so as to be switchable between a horizontal use state and an upper nonuse state.