JPH11347069A - Legless chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a elevating legless chair (for a Japanese tatami room) capable of aiding a user to stand up from a tatami or floor face and sit down on a tatami or floor reducing load on the user and securing safe of the user and others around. SOLUTION: On a base part 2 laid on a floor or tatami face, a seat part 1 is supported by a link mechanism and made to be lifted up/down by a drive mechanism 4. A bellows member 5 whose upper and lower ends are joined to the seat part 1 and base part 2 respectively is formed surrounding the link mechanism 3. The bellows member 5 includes a horizontal frame body 32 to constrain deformation of the bellows member 5 and the frame body 32 is kept in a suitable position in the horizontal direction by a guide member 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat chair used when sitting on a tatami or a floor, and more particularly to a seat chair whose seat surface moves up and down.

[0002]

2. Description of the Related Art Elderly people often prefer to live in a Japanese-style room, but in a tatami room, the burden of standing up and sitting increases. In other words, if the strength of the legs and legs is weak, as in the case of elderly people, standing and sitting may be troublesome, and handrails and auxiliary frames for catching and supporting the body may be required. Also, not only elderly people but also persons with physical disabilities, pregnant women, and the like may be similarly burdened to stand up or sit.

[0003] Under such circumstances, there have been proposed some chairs in which the seat surface is raised and lowered mechanically. For example, Japanese Patent Application Laid-Open Nos. Hei 6-98910, Hei 7-308344, and Hei 9-308344 disclose. There is one disclosed in, for example, US Pat. The seat chair disclosed in JP-A-6-98910 has a base frame placed on a tatami or a floor and a seat plate on which a user sits, and these are connected by a parallel link mechanism. The seat plate is raised and lowered by the repulsive force of the compression coil spring and the force of the user operating the operating armrest.

A seat chair disclosed in Japanese Patent Application Laid-Open No. 7-308344 has a lower guide rail on a lift arm placed on a tatami mat or a floor, and a seat surface on which a user sits. The seat surface is supported by two pairs of elevating arms which are arranged in a cross shape and are rotatably connected to each other. Then, the seat surface is moved up and down with respect to the lower rail by changing the distance between the ends of the lift arm by a drive motor.

[0005] The chair described in Japanese Patent Application Laid-Open No. 9-223869 is provided with swing support legs that can be raised and lowered with respect to a base, and the seat surface is supported by the swing support legs. Then, the swing support leg is raised and lowered by driving the motor to perform the lifting / lowering operation of the seat surface.

[0006] In any of such chairs, the seat surface can be raised and lowered, so that when the user stands up, he or she rises while sitting on the seat surface, and has a burden of standing up from a chair generally used in a Western-style room. And can be easily erected. Also, when sitting down, the user can sit down on a tatami mat or a floor surface with a slight load by sitting down on a chair and then lowering the seating surface.

[0007]

However, the above-mentioned conventionally known lift-type chairs have the following problems. As the member forming the seat surface rises and lowers with respect to the member placed on the tatami etc.,
When the member forming the seat surface is lowered, there is a risk that a limb or clothing may be caught between the two members. It is also conceivable that limbs or clothes may be interposed between the link mechanism supporting the member forming the seating surface and the above member. If a limb is caught between such mechanical members, there is a possibility of serious injury, which is extremely dangerous. In addition, there are cases where a small child is present in the living room, and it is necessary to eliminate the danger as described above.

The invention according to the present application has been made to solve the above-mentioned problems, and an object of the invention is to assist the user to stand up on a tatami mat or a floor surface or to sit on the tatami mat and to bear a burden. It is an object of the present invention to provide an up-and-down type seat chair which can reduce the number of times and can secure the safety of a user or a person around.

[0009]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 is characterized in that a base placed on a floor or a tatami mat is supported substantially horizontally, A seat on which a user sits; a link mechanism for supporting the seat on the base so as to be able to move up and down; a driving mechanism for moving the seat up and down; an upper part connected to the seat, and a lower part connected to the base. Further, the present invention provides a seating chair having a bellows member which expands and contracts in the vertical direction surrounding the link mechanism.

The above link mechanism can be moved up and down while maintaining the seat substantially horizontal on the base, such as a pantograph-shaped mechanism such as a parallel link or a support member having both ends rotatably connected so as to cross each other. Various mechanisms that can be supported by the robot can be adopted. Further, the drive mechanism drives a member of the link mechanism by a motor,
Various mechanisms can be employed, such as one that raises and lowers the seat, one that uses fluid pressure, and one that combines these.

In such a chair, the upper and lower ends of the link mechanism are surrounded by bellows members connected to the seat and the base, respectively, so that the limbs and clothes are caught in the link mechanism when moving up and down the seat. Safety is ensured. In addition, since the bellows member can expand and contract in the vertical direction, it does not hinder the elevation of the seat, and can effectively assist the user in standing and sitting by the elevation of the seat. it can.

In the chair according to the second aspect, the bellows member includes a frame that is arranged so as to surround the link mechanism and restrains deformation of the bellows member.
Even when a force that strongly presses the side surface of the bellows member is applied at the time of raising and lowering the seat, the bellows member can be prevented from being caught in the link mechanism, and a smooth lifting operation can always be performed.

Further, as in the chair according to the third aspect,
The horizontal position of the frame body is restrained by the deformation restricting member, thereby preventing the bellows member from being greatly deformed by the force from the side surface. Is prevented.

According to a fourth aspect of the present invention, in the seat chair according to the third aspect, the deformation restricting member is rotatably joined to the base or a member fixed to the base at a lower end thereof. The guide member is provided upright along the bellows member, and the upper portion is a guide member housed inside a backrest attached to the seat portion.

With this configuration, when the seat is raised, both ends of the guide member are erected between the base and the seat, and the horizontal position of the frame surrounding the guide can be restrained. .

The invention described in claim 5 is the same as the invention described in claim 3.
The seat chair according to any one of claims 1 to 3, wherein the deformation restricting member is configured such that both ends thereof are the base or a member fixed to the base and the frame, or a member fixed to the seat or the seat and the frame. And a connecting member rotatably joined to the connecting member.

In the chair having such a configuration, the frame body is allowed to move in the vertical direction by the rotation of the connecting member, and is restricted in the horizontal direction within a predetermined range according to the operation in the vertical direction. You. Therefore, the bellows member does not undergo large deformation even when a large force acts from the side,
It expands and contracts while maintaining an appropriate shape according to the elevation of the seat.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing a seat chair according to an embodiment of the present invention described in claim 1, claim 2, claim 3, or claim 4, and FIGS. 2 and 3 are vertical sectional views. is there. The chair comprises a seat 1 on which a user sits, a base 2 placed on a tatami or a floor, a link mechanism 3 for supporting the seat 1 on the base so as to be able to move up and down, and The main part is composed of a drive mechanism 4 for raising and lowering the bellows, and a bellows member 5 that covers the side part of the link mechanism 3 and expands and contracts in the vertical direction.

The seat 1 has a cushion member mounted on a plate member 1a, and a backrest 6 is attached to a rear portion thereof. The base 2 is made of wood or metal and is on a tatami mat or a floor to support the weight of the chair and the weight of the user. It has size and strength.

The link mechanism 3 includes a lower guide rail 11 fixed substantially horizontally on the base 2 and an upper guide rail 12 fixed to the plate 1a of the seat portion in parallel with the lower guide rail 11. The lower end is the lower guide rail 1
A first support member 13 whose upper end is rotatably connected to a front portion of the upper guide rail 12 at a rear portion thereof; and a first support member 13 which is rotatably connected at a substantially central portion to the first support member 13; The upper and lower ends have a second support member 14 that moves along the upper or lower guide rail, respectively, and these members are provided in pairs near the two sides of the base 2 or the seat 1 respectively. Is provided.

The second support member 14 has small wheels 15 and 16 attached to both ends thereof, and these are engaged with the upper guide rail 12 or the lower guide rail 11 in the form of a channel. It rolls in the axial direction.

The drive mechanism 3 includes a motor 21 having a built-in speed reducer, a rotary shaft 22 provided with threads over substantially the entire length thereof, and a second link mechanism which is screwed to the rotary shaft and located on the left and right. It has an operating member 23 connected to the lower end of the support member 14. The rotation driving force is reduced by the rotation of the motor 21 and transmitted to the rotating shaft 22. When the rotating shaft 22 rotates around its axis, the operating member 23 moves back and forth, and moves the lower end of the second support member 14 back and forth along the lower guide rail 11. As a result, the angles of the first and second support members 13 and 14 change, and the upper guide rail 12 and the seat 1 are raised and lowered.

The bellows member 5 comprises a rubber skin member 31 divided into three parts, upper and lower, and a metal frame 32 connecting these members to each other on the inner side. The edge portion is thickened as shown in FIG. 4, and the frame 32 joins the upper and lower skin members 31 so as to embrace the thickened portion. The upper edge of the bellows member 5 is joined to the lower surface of the plate 1a of the seat, the lower edge is joined to the upper surface of the base 2, and the link mechanism 3 and the drive mechanism 4 are surrounded by the bellows member 5. .

At the rear end of the lower guide rail 11, a deformation restricting member 33 for the bellows member 5 is provided. The deformation restricting member 33 is a rod-shaped member whose lower end is rotatably connected to the lower guide rail 11 and rises upward, and is mounted inside the frame 32 as shown in FIG. The horizontal position of the frame 32 is restrained by the locking member 34. The upper part of the deformation restricting member 33 has a hollow support 6 having a backrest.
a, and when the seat 1 is lowered, it is inserted into the column.

Reference numeral 24 shown in FIG. 2 denotes an air damper. Both ends are connected to a rotating shaft 17 and a base 2 which connect the two at the intersection of the two support members 13 and 14, and the seat 1 is provided. It assists the driving force when raising.
That is, when the seat 1 is lowered, the rod 24a is housed in the cylinder and compresses the gas sealed in the cylinder. When the seat 1 is raised, the two support members 13 and 14 are pushed up.

In the above chair, when the user tries to sit on the chair, the seat 1 is raised,
The user sits down on a chair, and then lowers the seat 1. Therefore, even if the user is an elderly person or the like, the user can sit without feeling a heavy burden. At this time, a bellows member 5 provided so as to surround between the seat 1 and the base 2
Contracts vertically as they are folded. Then, the deformation is restricted by the frame 32 arranged in a substantially horizontal direction, and the horizontal position of the frame 32 is appropriately maintained by the deformation restricting member 33, as shown in FIG. 5 or FIG. Then, the seat 1 descends while the bellows member surrounds the link mechanism 3.

As described above, the space between the seat 1 and the base 2 is appropriately surrounded by the bellows member 5, so that the hand or the foot can be placed between the seat 1 and the base 2 or a component of the link mechanism 3. Or, it will not be caught between clothes, and sufficient safety is maintained.

On the other hand, when the user wants to stand up, the user can raise the seat 1 while sitting on the seat 1, and after the user can easily get up with the same force as using a Western chair.

FIG. 8 is a schematic vertical sectional view of a seat chair according to an embodiment of the present invention as set forth in claim 1, claim 2, claim 3 or claim 5. This chair has a base 52, a seat 51 and a link mechanism 5 similar to those shown in FIGS.
3. The bellows member 55 is provided, but instead of the deformation regulating member 33 raised from the lower guide rail 61, a connecting member 65 between the lower guide rail 61 and the first frame 63 and an upper guide A connecting member between the rail 62 and the second frame 64 is used. These connecting members 64, 6
Reference numeral 5 denotes a frame body which is rotatably mounted at both ends, and which moves in the vertical direction as the seat portion 51 moves up and down.
The horizontal positions of 3, 64 are regulated. Even in such a chair, similarly to the chair shown in FIGS. 1 to 7, the link mechanism 53 is appropriately surrounded by the bellows member 55 even when the seat part 51 is raised and lowered, and sufficient safety is maintained. Can be.

[0030]

As described above, in the chair according to the invention of the present application, the seat part moves up and down to assist the user in standing up and sitting down, thereby significantly reducing the burden on the user, and It is possible to sufficiently maintain the safety of the user or the person in the vicinity due to the elevation of the section.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a seat chair according to an embodiment of the present invention described in claim 1, claim 2, claim 3 or claim 4.

FIG. 2 is a vertical sectional view of the chair shown in FIG.

FIG. 3 is an elevational sectional view of the chair shown in FIG. 1;

FIG. 4 is an enlarged sectional view showing a joint of a skin member constituting the bellows member.

FIG. 5 is a schematic plan sectional view showing a locking portion between the deformation regulating member and the frame.

FIG. 6 is an elevational sectional view showing a state where a seat portion of the chair shown in FIG. 1 is lowered.

FIG. 7 is a sectional elevational view showing a state where a seat portion of the chair shown in FIG. 1 is lowered.

FIG. 8 is a schematic elevation sectional view showing a seat chair according to an embodiment of the present invention described in claim 1, claim 2, claim 3 or claim 5.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 51 Seat part 2, 52 Base part 3, 53 Link mechanism 4 Drive mechanism 5, 55 Bellows member 6 Backrest 11, 61 Lower guide rail 12, 62 Upper guide rail 13 First support member 14 Second support member 15 Small wheel 16 Small wheel 17 Rotating shaft 21 Motor 22 Rotating shaft 23 Operating member 24 Air damper 31 Skin member 32 Frame 33 Deformation regulating member 34 Locking member 63 First frame 64 Second frame 65 First Connecting member 66 Second connecting member

Claims (5)

[Claims] 1. A base which is placed on a floor or a tatami mat, a seat which is supported substantially horizontally, and on which a user sits on an upper surface, and a link which supports the seat on the base so as to be able to move up and down. A mechanism, a drive mechanism for raising and lowering the seat, and an upper part connected to the seat, a lower part connected to the base, and a bellows member that expands and contracts in the vertical direction surrounding the link mechanism. Chair. 2. The seating chair according to claim 1, wherein the bellows member includes a frame disposed to surround the link mechanism and restraining deformation of the bellows member. 3. The chair according to claim 2, further comprising a deformation restricting member for restricting a horizontal position of the frame. 4. The deformation restricting member has a lower end rotatably joined to the base or a member fixed to the base, and is erected along the bellows member. The seat chair according to claim 3, wherein the seat member is a guide member housed inside the attached backrest. 5. The deformation restricting member has both ends turned around the base or a member fixed to the base and the frame, or the seat or a member fixed to the seat and the frame, respectively. The chair according to claim 3, wherein the chair is a connecting member movably joined.