JP3099182B2 - Elevating chair structure with wheels - Google Patents

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,
When rising from the seat plate of the chair, the wheel is pushed down in the floor direction by a spring attached to the footrest portion, and the cushioning material is detached from the floor surface , and the wheel is mounted on the footrest portion. One end of a spring that is attached to an attachment to be attached to the front portion and that constantly presses the attachment onto the floor is connected to the attachment, and the other end of the spring is connected to the footrest. allowed, attachment body attached to the front portion of the front Kiashi base portion, brought attached to state covering the front portion of the isosceles section, the pin that connects the front Kiashi base member and said attachment member A chair structure with liftable wheels, which is positioned above the spring , wherein the attachment body is located below the spring and the inclination angle is adjusted by a stopper pin attached to the attachment body. .

[0005]

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 rises 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.

Further, in the present invention, the wheels 11 are attached as follows. An attachment 8 attached to a front portion 5 of the footrest 4 via a pin 10 is attached to the footrest 4 and the attachment 8.
The spring 13 is attached to the pins 14 and 15 respectively attached.

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

[0009] or taken adherend 8, the front part 5 of the isosceles section 4
With the wheels 11 covered. Therefore, the spring 1 attached inside the leg base 4 and the attachment body 8
3, when a person does not sit on the seat plate 1, the floor surface 1
When the seat 8 is slightly inclined in the seven directions, and is seated in the opposite direction, the attachment body 8 and the wheels 11 are pushed up by the action of the spring 13, the cushioning material 7 comes into contact with the floor surface 17, and the whole chair a is stopped.

[0010] The present invention further pin 10 which connects the front Kiashi base portion 4 and the attachment member 8 is mounted 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 sitting, and the wheels 11 are in contact with the floor surface 17.

[0011] The present invention, the attachment member 8, in order to ensure the inclined state by the action of the spring 13,
The position where the stopper pin 16 is attached to the attachment 8 is
It is below the spring 13.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the first aspect of the present invention will be described. 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.

[0014]

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 the present invention, one end of a spring is attached to an attachment body attached to a front portion of the footrest, and the attachment body is constantly pressed down on the floor. Since the other end of the spring was connected to the footrest, the chair was slightly lifted when not sitting,
This has the advantage that the portable state can be smoothly formed. Further, according to the present invention, since the attachment 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 wheels are attached to the leg portion of the user. It has the advantage of not touching.

Further, the present invention has an advantage that the spring always presses the attachment body in the direction of the floor surface, since the pin connecting the leg base and the attachment body is located above the spring. ing. Further, the present invention has an advantage that the stopper pin is attached to the attachment body below the spring and the inclination angle of the attachment body can be adjusted.

[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 2 Support 3 Vertical leg 3 'Horizontal reinforcing rod 4 Leg 5 One end of leg 6 Other end 7 Buffer 8 Attachment 9 Cap 10 Pin 11 Wheel 12 Axle 13 Spring 14, 15 Pin 16 Stopper Pin 17 Floor 18 Finger

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A47C 7/00 B60B 33/00-33/06

Claims (1)

(57) [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 When rising from the seat plate, the wheel is pressed down in the floor direction by a spring attached to the footrest, and the cushioning material is separated from the floor surface ,
Before SL wheels, said isosceles portion attached to attaching member to attach to the front portion, and connecting one end of the spring pressing the securing member in the securing member always floor of the spring because Shi not connect the other end to the isosceles section, before attaching member to attach to the front portion of the Kiashi base portion, Shi clothed collected in state covers the front portion of the isosceles portion
Because, the pin that connects the front Kiashi base portion and said attachment member is allowed positioned above the spring, said attachment member is in the lower portion of the spring is attached to且前SL attachment member A chair structure with a liftable wheel, wherein the inclination angle is adjusted by a stopper pin.