JP2671740B2 - Chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-pillar type chair suitable for use in offices and the like.

[0002]

2. Description of the Related Art A chair of this type is known, for example, one in which a pillar is erected in the center of a circular base plate and a chair body having a seat and a backrest is supported on the pillar. .

[0003]

However, in the structure described above, stacking on top of each other is not possible, so when a large number of chairs are stored in a corner of a room or a warehouse when not in use. , The total storage area determined by the size of the base plate or the size of the main body of the chair, or about half that when the chair is placed upside down on a chair that is upside down. However, occupying a large space just for storage is a wasteful storage form from an economical point of view. ing.

If the base plate has a circular shape or a shape close to the circular shape, the rear edge of the base plate comes into contact with the floor at one point when the entire chair is tilted rearward.
It was likely to be very unstable and lacked stability.

[0005] An object of the present invention is to solve such a problem.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the chair according to the present invention comprises a substantially circular base plate, a pillar standing on the base plate, and a chair main body provided on the pillar. A mounting plate portion fixed to the upper end of the support column and inclined so as to gradually rise forward, and a seat in a forwardly tilted position connected to the front end of the mounting plate portion. It is characterized in that a notch portion having a substantially V shape in a plan view is formed in the base plate so as to be opened rearward.

As a preferred mode of mounting the chair main body to the support column, a mounting base that tilts backward is provided at the upper end of the support column, and the mounting plate part of the chair main body is mounted on this mounting base, and the upper surface of this mounting plate part. A tightening plate is attached to, and a bolt projecting from this tightening plate is passed through the mounting plate portion and the mounting base, and a nut is screwed to the penetrating end of the bolt to fix the chair body to the column. be able to.

In order to improve the durability of the chair body, it is desirable to make the front edge position of the mounting base and the front edge position of the tightening plate different in the front-back direction.

[0009]

With this structure, it is possible to stack even though it is of the single-pillar type having the base plate. That is, the present invention is
The mounting plate portion of the chair body and the seat form a lateral V-shape in a side view, which widens rearward. Therefore, the front side of the chair main body of the first chair can be overlapped with the chair main body of the second chair to be polymerized. And at that time, by inserting the strut of the first chair into the cutout portion of the second chair,
It is possible to stack two chairs without making them bulky. The third, fourth, ... Chairs can be similarly stacked.

Further, in the chair according to the present invention, since the cutout portion is widened to the rear so as to form a substantially V shape in a plan view, when the chair is used alone and tilted rearward, the outside of the base plate is removed. Two open ends of the notch in the peripheral edge come into contact with the floor.
Therefore, the instability of single-point support can be eliminated.

If the mounting plate of the chair body is fixed to the mounting base of the column using the mounting plate as described above, it is possible to easily prevent the bolts and nuts from being exposed to the visible parts. The appearance can be improved without using a special cover or the like, and the mounting bolts and nuts can be surely prevented from getting in the way during stacking.

Further, by making the front edge position of the mounting base and the front edge position of the mounting plate different in the front-rear direction, it is possible to prevent bending stress from concentrating on one place of the mounting plate portion. .

[0013]

An embodiment of the present invention will be described below with reference to the drawings.

The chair 100 shown in FIG. 1 is provided with a circular base plate 1, a column 2 standing on the base plate 1, and a chair body 3 provided on the column 2. The chair body 3 is fixed to the upper end 21 of the column 2, and the mounting plate portion 31 is inclined so as to gradually rise forward.
The base plate 1 is provided with a seat 32 in a forwardly inclined posture, which is continuously provided on the front end 31a of the mounting plate portion 31.
A notch 11 having a substantially V shape in a plan view is formed by opening it rearward.

The base plate 1 is made of, for example, aluminum casting (casting), and a part of a disk having a raised portion 12 having an inverted U-shaped cross section at the peripheral portion of the upper surface is cut out in a fan shape to form a cutout portion 11. There is. The notch 11 has an angle of 60 °, for example.
Can be formed. In addition, a central protrusion 13 is formed at the center of the central protrusion 13 and is inserted into the lower end of the column 2. A male screw is cut at the center of the central protrusion 13 to fix the column 2 to the base plate 1. The body 14 is planted. A rubber sheet 15 having substantially the same shape as that of the base plate 1 is attached to the lower surface of the base plate 1 to prevent noise and slip (see FIG. 2).

The support column 2 is made of, for example, a steel pipe, and a mounting base 22 for mounting the chair body 3 is fixed to the upper end 21 of the support column 2 and is tightened in the upper end 21 when the base plate 1 is mounted. Stopper 23 for nut 4
Is fixed. The mounting base 22 has substantially the same shape as the mounting plate portion 31 of the chair body 3, and is mounted so as to be tilted rearward, and has bolt insertion holes 22a for mounting the chair body 3 at two locations on the central axis of the fan shape. The lower part of the side portion is reinforced by being provided with a triangular reinforcing plate 23. The column 2 is erected on the base plate 1 by accommodating the central protrusion 13 of the base plate 1 in the lower end thereof, and thereafter, rotation is prohibited by an insect screw (not shown) near the lower end, and the base 2 is kept in that state. The nut 14a is screwed onto the upper end of the screw rod body 14 of the plate 1 and tightened,
It is erected on the base plate 1.

The chair body 3 is formed by integrally forming a mounting plate portion 31 and a seat 32. For example, after a wooden flat plate is cut into a predetermined shape, a portion corresponding to the mounting plate portion 31 tilts backward. As described above, the portion corresponding to the seat 32 is inclined forward, and the portion corresponding to the backrest 33 connected to the rear end of the seat 32 is curved rearward from the lower side and then further curved forward ( Each of them is formed by press working so as to be curved into a gentle S shape. In the mounting plate portion 31 of the chair body 3, the bolt insertion holes 22 of the mounting base 22 of the column 2 are attached.
The through holes 31b are formed at the same pitch as a, and are inclined rearward, for example, about 30 ° from the horizontal, and the seat 32 is inclined forward, for example, about 10 ° from the horizontal. On the back surface side, a space having a lateral V-shape in a side view is formed by the mounting plate portion 31 and the seat 32 and widens rearward.

The chair body 3 is fixed by surface-supporting the mounting plate portion 31 on the mounting base 22 of the support column 2 by the tightening plate 4 having the bolts 41 protruding from the lower surface. That is,
When fixing the chair body 3, first, the mounting plate portion 31 of the chair body 3 is placed on the mounting base 22. At this time, the bolt insertion hole 22a of the mounting base 22 and the through hole 31b of the mounting plate portion 31
Match and place. In that state, next, the bolt 41 of the tightening plate 4 is passed through the bolt insertion hole 22a and the through hole 31b, and the nut 5 is screwed to the penetrating end of the bolt 41 so that the entire lower surface of the tightening plate 4 is attached. The plate portion 31 is fixed while being pressed against the mounting base 22. That is, the mounting plate portion 31 is
It is not fixed to the mounting base 22 by the two bolts 41 and the nut 5, but is fixed by being clamped by the mounting base 22 and the tightening plate 4. In addition, tightening plate 4
The size of the is, with the chair body 3 attached to the pillar 2,
The front edge 42 has a length such that it is located rearward of the front edge 22 b of the mounting base 22, and is substantially similar to the mounting base 22. That is, the mounting plate portion 31 is not sandwiched at the same position above and below the front end vicinity portion thereof in the height direction, but the upper surface position is located slightly behind the lower surface position.

In this structure, when a load is applied to the seat 32 during use, the seat 32 sinks and the front edge 31a of the mounting plate portion 31 is lifted slightly upward. At this time, the front edge 42 of the tightening plate 4 is attached to the mounting base 2 of the column 2.
Since it is located rearward of the front edge 22b of No. 2, the front edge 31a of the mounting plate portion 31 which is slightly lifted up is not pressed by the front edge 42 of the tightening plate 4, and stress concentrates on this portion and breaks. It is possible to prevent the damage from being caused. In addition, when the user leans against the backrest 33 and further applies a load to the rear side to lift the front edge 14 portion of the base plate 1, that is, when the chair 100 tilts backward, the cutout portion 11 of the base plate 1 is removed. Since the two open ends 11a come into contact with the floor and are not supported at one point like a circular base plate, sufficient stability is exhibited even in a backward tilted state.

When not in use, that is, at the time of storage, FIG.
As shown in, a plurality of chairs 100 can be stacked and stored. That is, the stacking and stacking of the chairs 100 is performed by placing the second chair 100b on the seat 32 of the first chair 100a and the seat 32 of the second chair 100b from the front side of the first chair 100a placed on the floor. To place. In the second chair 100b, a lateral V-shaped space formed by the mounting base 22 and the seat 32 in the side view is formed by the mounting base 22 and the seat 32 of the first chair 100a and bulges forward. The first chair 100a is stacked from the front side so as to cover the projecting portion. In the stacked state, the second chair 2 is placed on the base plate 1 of the first chair 100a.
The base plates 1 of the chair 100b are stacked, but the base plate 1 of the second chair 100b abuts on the pillar 2 of the first chair 100a in the vicinity of the pillar 2 of the cutout 11.
Therefore, with a distance slightly larger than the outer diameter of the support column 2, almost the entire base plate 1 of the second chair 100b is the first.
Will overlap with the base plate 1 of the chair 100a of
Moreover, the second chair 1 is placed on the seat 32 of the first chair 100a.
The seat 32 of 00b is overlapped, and the first chair 100
The two chairs 100 can be overlaid with almost no gap between a and the second chair 100b. And similarly, the third, fourth ... Nth chairs 100c, 100d ... 100n can be stacked on the second chair 100b. Therefore, the chair 10 placed on the floor
Since the stacking area does not increase from the mounting area of 0, the exclusive area for storage can be reduced when storing by stacking.

In addition, various modifications can be made without departing from the spirit of the present invention.

[0022]

As described above in detail, according to the present invention, the chair body has the lateral V-shape in side view formed by the mounting plate portion and the seat.
In addition, since the base plate has a notched portion that is substantially V-shaped in a plan view and opens rearward, stability is not lost due to the presence of the notched portion even when the base plate is tilted backward when used. Despite being a substantially circular base plate, sufficient stability can be secured even in dynamic use, and when not in use, the base plates that overlap each other due to the notches overlap almost the entire surface and stacking It can be stored, and the occupied area for storage in the stacking state can be minimized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view in the embodiment.

FIG. 3 is a side view showing a stacking state in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base plate 2 ... Strut 3 ... Chair body 4 ... Tightening plate 5 ... Nut 11 ... Notch 22 ... Mounting base 22b ... Front edge 31 ... Mounting plate part 31a ... Front end 32 ... Seat 41 ... Bolt 42 ... Front edge

Claims (3)

(57) [Claims] 1. A chair comprising a substantially circular base plate, a pillar standing on the base plate, and a chair main body provided on the pillar, wherein the chair main body is an upper end of the pillar. And a seat in a forwardly tilted posture, which is connected to the front end of the mounting plate portion, and which is fixed to the base plate. A chair having a substantially V-shaped notch formed by opening it rearward. 2. A mounting base that tilts rearward is provided at the upper end of the column, the mounting plate of the chair body is mounted on the mounting base, and the tightening plate is attached to the upper surface of the mounting plate. Through the mounting plate and mounting base,
2. The chair according to claim 1, wherein a nut is screwed on a penetrating end of the bolt to fix the chair body to the column. 3. The front edge position of the mount and the front edge position of the tightening plate are different in the front-rear direction.
The listed chair.