JPH10276852A - Chair structure of elevation type with casters - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate such risk that a chair moves undeliberately or tumble, and to ensure smooth movement of the chair, by introducing such a structure that casters move upward when a person seated, a buffer fixed to the leg base part grounds to the floor surface, and that the casters are depressed toward the floor surface when the person stands up and the buffer is separated from the floor surface. SOLUTION: When a person sits on a seat plate 1 constituting a chair (a), casters 11 move upward, and a buffer 7 fixed to a leg base part 4 is grounded to the floor surface 17. Before the grounding of the buffer 7, the other end 6 fitted with a cap 9 to constitute the leg base part 4 is grounded to the floor surface 17. When the sitting stands up, the casters 11 are depressed toward the floor surface 17 by an expansion/contraction force of a spring hitched at a pin mounting piece 8 attached to one end of the leg base part 4. With this depression of casters 11, the casters 11 and buffer 7 separate from the surface 17. In this condition, a seat back 3'a fixed to a supporting rod 3a is grasped by fingers 18 and carried to the specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of lifting chair structures with wheels.

[0002]

2. Description of the Related Art In a conventional chair, wheels (casters) are attached to lower portions of legs constituting the chair to facilitate movement. However, due to the structure with wheels (casters) as described above, depending on the method of use, there is often a risk of sudden movement or falling.

[0003]

SUMMARY OF THE INVENTION According to the present invention, when sitting on a chair, the weight of the wheel moves upward, and a cushioning material (leg seat) attached to a footrest attached to the lower part of the leg. The floor is grounded and the whole chair is stable. Further, according to the present invention, when a person sitting on the floor rises, the wheels attached to the ends of the legs constituting the chair are pushed down in the direction of the floor surface by the expansion and contraction of a spring, and The chair is easily moved forward or backward by lifting the footrest to which the wheels are not attached because the cushioning material (leg seat) attached to the chair is detached from the floor surface.

[0004]

According to the first aspect of the present invention,
A chair having a seat plate, a support portion for supporting the seat plate, a vertical leg portion attached to the support portion, and a footrest portion attached horizontally below the leg portion; At a predetermined position constituting the base, when sitting on the seat plate of the chair, the wheels move upward and the cushioning material attached to the leg base contacts the floor surface,
A chair structure with a liftable wheel, wherein the wheel is pushed down in the floor direction by a spring attached to a footrest when the chair rises from the seat plate of the chair, and the cushioning material is detached from the floor surface. It is.

Further, according to a second aspect of the present invention, there is provided a spring in which the wheel is mounted on an attaching body attached to a front portion of the footrest, and the attaching body is constantly pressed onto the floor. Is connected to one end of the spring, and the other end of the spring is connected to the footrest.

According to a third aspect of the present invention, there is provided a chair structure with a vertically movable wheel, wherein an attaching body attached to a front portion of the footrest portion is attached so as to cover the front portion of the footrest portion. .

The invention according to a fourth aspect of the present invention is a chair structure with wheels that can be lifted and lowered, wherein a pin connecting the leg base and the attachment body is located above the spring.

According to a fifth aspect of the present invention, there is provided a chair with a vertically movable wheel, wherein the attachment body is provided below the spring and the inclination angle is adjusted by a stopper pin attached to the attachment body. Structure.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the invention described in claim 1 will be described below. In the present invention, when the user sits on the seat plate 1 constituting the chair a, the wheels 11 move upward, and at the same time, the cushioning material 7 attached to the footrest portion 4 comes into contact with the floor surface 17. As described above, the cushioning material 7 is
Before touching the ground, the cap 9 constituting the footrest 4 is
The other end 6 is grounded to the floor 17 so that the entire chair a does not easily move.

By the way, when the user stands up from the seated state, the wheel 11 is hooked on the pins 14 and 15 attached to the footrest 4 and the attachment body 8 attached to one end of the footrest 4. The spring 13 is pushed down in the direction of the floor surface 17 by the expansion and contraction force of the spring 13. At the same time as the wheel 11 is pressed in the direction of the floor 17 as described above, the wheel 11 and the cushioning material 7 are separated from the floor 17. In the above state, the backrest 3'a attached to the backrest support rod 3a is grasped by the fingers 18 and carried to a predetermined position.

The embodiment of the invention described in claim 2 will be described below. In the present invention, the wheel 11 according to the first aspect of the present invention is attached as follows. A spring 13 is attached to pins 14 and 15 attached to the footrest 4 and the attachment 8, respectively, to an attachment 8 attached to the front part 5 of the footrest 4 via a pin 10. I do.

With the above structure, the spring 13
However, the attachment body 8 is constantly pushed down toward the floor surface 17.

An embodiment of the invention according to claim 3 will be described as follows. The present invention relates to claim 1
The attachment body 8 according to the described invention is attached with the wheel 11 over the front portion 5 of the footrest portion 4. Therefore, when a person does not sit on the seat plate 1 by the spring 13 attached inside the leg base 4 and the attachment body 8, the person slightly inclines in the direction of the floor surface 17.
And the wheel 11 are pushed up by the action of the spring 13, so that the cushioning material 7 comes into contact with the floor 17 and the entire chair a is stopped.

An embodiment of the invention described in claim 4 will be described as follows. In the present invention, the pin 10 for connecting the leg base 4 and the mounting body 8 according to the first to third aspects of the present invention is attached so as to be located above the spring 13. Therefore, the attachment body 8 is always inclined in the direction of the floor surface 17 when not seated, and the wheels 11 are in contact with the floor surface 17.

The embodiment of the invention described in claim 5 will be described as follows. The present invention relates to a stopper pin 1 for securing the attachment body 8 according to the first to fourth aspects of the invention by the action of the spring 13.
6 is attached to the mounting body 8 with the spring 1
3 below.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the invention according to claim 1, claim 2, claim 3, claim 4, and claim 5 will be described collectively. 1
Is a seat plate constituting the chair a, and 2 is a support portion for supporting the seat plate 1. 3 is a vertical leg attached to the support 2, 2 '
Is a horizontal reinforcing rod for supporting the leg 3, and 4 is the leg 3
Is a hollow base that is horizontally attached to the lower part of the base. 5
Is an end portion of the footrest portion 4, 6 is the other end portion, and 7 is a cushioning material attached to the bottom surface near one end portion of the footrest portion 4. Numeral 8 denotes an inner space-like attachment that slightly rotates through one end of the leg base 4 via a pin 10. 9 is a cap attached to the other end 6, 11
Numerals are wheels mounted in the attachment body 8 via an axle 12. When the attachment body 8 is in a horizontal state from the bottom surface of the attachment body 8, the wheels protrude slightly so as to be horizontal with the cushioning material 7. A spring 13 has one end hooked on a pin 14 attached to the attachment body 8 and the other end hooked on a pin 15 attached to one end of the leg base 4.

The relationship between the mounting body 8 and the spring 13 is such that when the sitting body 1 is not seated, the mounting body 8 is always indexed by the action of the spring 13 and is inclined toward the floor 17. . Therefore, the indexing force of the spring 13 is
The chair has strength enough to lift the chair a. A stopper 16 is provided below the spring 13 and attached to the mounting body 8.
It is a pin that limits the angle of inclination of the attachment 8.

[0018]

The present invention has the following effects. In the invention according to claim 1, when sitting on a seat plate of a chair at a predetermined position constituting a footrest portion, wheels move upward and a cushioning material attached to the footrest portion touches the floor surface, When the chair rises from the seat plate of the chair, the wheels are pushed down in the direction of the floor by a spring attached to the footrest, and the cushioning material is detached from the floor, so that the chair unexpectedly moves or falls. There is an advantage that the chair can be moved very smoothly without fear.

Further, according to a second aspect of the present invention, the wheel is mounted on an attaching body attached to a front portion of the footrest, and the attaching body is constantly pressed onto the floor. Since one end of the spring is connected and the other end of the spring is connected to the footrest, the chair can be lifted slightly when not sitting down, so that the portable state can be smoothly formed. Has advantages. According to the third aspect of the present invention, since the attaching body attached to the front portion of the footrest portion is attached so as to cover the front portion of the footrest portion, the spring and the wheel are used by the user. Has the advantage of not contacting the legs.

Further, in the invention according to claim 4, since the pin connecting the footrest and the attachment is located above the spring, the spring always presses the attachment toward the floor. Has advantages. The invention according to claim 5 has the advantage that the stopper pin is attached to the lower part of the spring and the attachment body, so that the inclination angle of the attachment body can be adjusted. ing.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair having a chair structure with a liftable wheel according to the present invention.

FIG. 2 is a partially cutaway enlarged plan view of a main part of the chair.

FIG. 3 is a partially cutaway enlarged side view of the main part.

FIG. 4 is a partially cut-away longitudinal side view of the essential part.

FIG. 5 is a partially cut-away longitudinal side view of the main part.

FIG. 6 is a perspective view showing a moving state of the chair.

[Explanation of symbols]

 a Chair 1 Seat plate 2 Supporting part 3 Vertical leg 3 'Horizontal reinforcing rod 4 Footrest 5 One end of legrest 6 Other end 7 Buffer material 8 Attachment 9 Cap 10 Pin 11 Wheel 12 Axle 13 Spring 14, 15 Pin 16 Stopper Pin 17 Floor 18 Finger

Claims (5)

[Claims] 1. A seat plate, a support portion for supporting the seat plate, a vertical leg portion attached to the support portion, a footrest portion horizontally attached to a lower portion of the leg portion, and the like. In the chair, at a predetermined position constituting the footrest portion, when sitting on a seat plate of the chair, the wheels move upward and the cushioning material attached to the footrest portion touches the floor surface, and A chair structure with a liftable wheel, wherein when the vehicle rises from the seat plate, the wheel is pushed down in the floor direction by a spring attached to the footrest portion, and the cushioning material is separated from the floor surface. 2. The wheel is mounted on an attachment attached to a front portion of the footrest, and one end of a spring that constantly presses the attachment to the floor is connected to the attachment. 2. The chair structure according to claim 1, wherein the other end of the spring is connected to the footrest. 3. An attachment body attached to a front portion of the footrest portion,
The lifting chair structure with wheels according to claim 2, wherein the chair structure is attached to a front portion of the footrest portion so as to cover the front portion. 4. The lifting wheel according to claim 1, wherein a pin for connecting the footrest and the attachment body is located above the spring. Chair structure. 5. The mounting device according to claim 1, wherein said attachment body is provided below said spring, and an inclination angle of said attachment body is adjusted by a stopper pin attached to said attachment body.
The chair structure with a lifting type wheel according to any one of the above.