JP3343772B2 - Chair seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a seat portion of a chair having seat portions mounted on front and rear horizontal rods for connecting upper portions of left and right leg frames which are substantially rectangular in side view.

[0002]

2. Description of the Related Art Conventionally, a seat portion of a chair as described above usually has an appropriate number of through-holes at key points of an upper portion of a leg portion, and a seat plate in a seat portion mounted on both leg frames. Both sides of the through hole
Of by stopping by inserted screws from below, it was attached to the leg frame.

[0003]

[SUMMARY OF THE INVENTION] As described above, when mounting the seat of a conventional chair upper rod of the leg frame, if the both positioning is incorrect, when a product, in both since the position deviation occurs, upon assembly, the exact position <br/>-decided Me both took time and effort.

In addition, a nut is embedded in the seat plate, and the upper part of the leg frame is
With bolts inserted from below through holes provided in the rod, the seat
In a chair in which the frame is attached to the upper frame rod, the positions of the through holes in the nut and the upper frame rod are displaced, making assembly difficult and possibly damaging the screw thread.

Further, the cover covering the cushion material on the seat plate, while its peripheral portion is fixed to the lower surface peripheral portion of the seat plate, the conventional cover, violent in expansion and seated by the seat occupant's weight In some cases, the fastening part was peeled off due to an excessive operation.

[0006] Furthermore, it is desirable that the chair as described above is lightweight so that it can be easily moved, and for that purpose, the seat plate which occupies most of the weight of the seat needs to be lightweight. However, this weight reduction was not easy because of the relationship with the strength.

According to the present invention, the seat can be easily and firmly attached to the leg frame, and the periphery of the cover of the seat does not peel off from the seat, and the seat is lightweight and strong. It is intended to provide a comfortable chair seat.

[0008]

According to the present invention, the above-mentioned problem is solved as follows. (1) In a seat portion of a chair attached above a pair of left and right leg frames which are substantially square in side view and a front horizontal bar connecting the front upper portions of the both leg frames, outer portions of both sides of the lower surface of the seat plate. Slightly inward from the edge, side ridges that the inner surfaces of the upper and lower rods of the upper frame of the two leg frames can contact are suspended, and the upper surface and the front surface of the front horizontal rod of the leg frame are provided at the lower front end of the seat plate. The front ridge on which the abutment comes into contact is erected.

(2) In the above item (1), the peripheral edge of the cover in the seat is adhered to both sides of the lower surface of the seat plate, the rear end, and the lower surface of the front ridge.

(3) In the above item (1) or (2), the side ridge and the front ridge are provided with a large number of bottomed holes which are open on the upper surface, and the front ridge has a lower end with a front end. The piece is provided with a horizontal plane behind it.

(4) In any one of the above items (1) to (3), a plurality of reinforcing ridges are provided on the lower surface of the seat plate in the left-right direction and spaced at the front and rear. , A large number of bottomed holes that are open on the upper surface.

[0012]

[Function] When mounted on the leg frame, the peripheral edge of the seat plate rests on the upper frame bar and the front and rear horizontal bars of both leg frames, and both side ridges and the front ridge of the seat plate are both upper frame. Since the inner side surface of the rod is in contact with the front surface of the upper surface of the front horizontal rod, the seat plate can be correctly and easily positioned on the leg frame (all claims).

If the peripheral edge of the cover in the seat is adhered to both sides of the lower surface of the seat plate and the rear end and the lower surface of the front ridge, the seat is seated on a chair attached to the left and right leg frames. The peripheral edge of the cover is strongly clamped by the weight of the occupant between the peripheral edge of the lower surface of the seat plate and the lower surface of the front ridge, the upper frame rod of the leg frame, and the front and rear horizontal rods. The part does not peel off (claim 2).

Each of the side ridges and the front ridge is provided with a large number of bottomed holes which are open on the upper surface, and a hanging piece is provided at the front end of the lower surface of the front ridge and a horizontal plane is provided behind the hanging piece. Due to the bottom hole, each ridge is reduced in weight without deteriorating its strength, and the horizontal surface and the hanging piece of the front ridge are positioned in the front-rear direction when the seat is attached to the leg frame. .

If a plurality of reinforcing ridges are provided on the lower surface of the seat plate in the left-right direction and spaced apart in the front-rear direction, and each reinforcing ridge is provided with a number of bottomed holes opening on the upper surface, the weight can be reduced. Since the seat plate is reinforced by the reinforcing ribs, the seat plate can be made thinner and lighter.

[0016]

EXAMPLES 1 and 2 show an example of a chair with a seat according to the present invention (A). Front vertical rods (1a) (1a) of a pair of left and right leg frames (1) (1) formed by bending pipes
Are connected by a pipe-shaped front horizontal rod (2).

The rear vertical rod (1b) of the leg frames (1) and (1) is a front vertical rod.
(1a) The front and rear rods (1
A c-shaped backrest frame (5) is provided at the upper end thereof, which protrudes upward from c), and has a U-shaped downward facing front view. (3) is the seat
In the rear cover section U-shaped for covering the lower surface rear portion of (A), the bottom key point of its, as shown in FIG. 9, an engagement hole (4) is bored.

The seat of the present invention (A) is the upper longitudinal rod of the leg frame (1) (1c) and anterior Yoko杆(2), Ru Tei mounted as described later. The backrest (5) is provided with a backrest (6) preferably having the same configuration as that of the seat (A).

FIGS. 3 to 9 show a seat (A), and a front ridge (8) facing downward is formed at the front end of a substantially rectangular synthetic resin seat plate (7). Have been. The front protrusion (8), the seat plate long plurality of bottomed holes in the lateral direction recessed from the top surface (7) (9) is column set, and the lower surface of the front ridge (8) A horizontal surface (11) having a hanging piece (10) at the front end.

Slightly inward from both side edges of the lower surface of the seat plate (7),
Except for its front and rear ends, a downwardly projecting side ridge (12) is formed, and on the upper surface of the side ridge (12), a number of long ridges extending in the front and rear direction are recessed from the upper surface of the seat plate (7). bottomed holes (13) are column set.

Slightly in front of the rear end of the lower surface of the seat plate (7), except for both side ends, a vertical strip-shaped rear ridge (14) curved in an arc along the rear end edge is provided. Have been.

Left and right side ridges (1) on the lower surface of the seat plate (7)
Between 2), there are formed a plurality of reinforcing ridges (15) which face in the left-right direction and are arranged at intervals in the front-back direction. Each reinforcing ridge
(15) is provided with a large number of bottomed holes (16) which are recessed from the upper surface of the seat plate (7), are long in the left-right direction, and are arranged close to each other in two rows.

The rear ridge (14) at the rear of the lower surface of the seat plate (7)
At a location corresponding to each of the engagement holes (4) immediately before
An engagement piece (17) is vertically provided.

The seat portion (A) has a cushion material (18) laid on the upper surface of the seat plate (7), which is covered with a soft cover (19), and a peripheral portion of the cover (19) is attached to the seat plate (7). After being wound around the lower surface of the peripheral edge of 7), the horizontal surface (11) of the front ridge (8), the lower surfaces of the side ridges (12) and (12), and the rear ridge (14) of the seat plate (7). Is formed by bonding with an adhesive to the rear surface of the seat plate (7) at the rear of the seat plate (7).

The seat (A) is placed on a worktable with its upside down, and the leg frame (1) is placed on it, and the front horizontal rod (1) of the leg frame (1) is turned upside down. 2) is slightly behind the front ridge (8) of the seat plate (7), and the upper front and rear rods (1c) of the leg frame (1) are the seat plate.
The leg frame (1) is slightly inclined forward and downward so as to overlap with the outer surface of the side ridges (12) and (12) of (7), and its front portion is turned upside down. Place on A).

Next, the leg frame (1) is advanced along the side ridges (12) (12), and the front horizontal rod (2) of the leg frame (1) is attached to the hanging piece of the seat plate (7). Make contact with (10).

Next, the rear cover (3) is pressed from above the inverted seat plate (7) with the rear ridge (14) positioned substantially at the center thereof, and the engagement hole (4) is pressed. And engagement piece
When (17) is engaged, the rear cover (3) is mounted at a fixed position on the lower surface of the seat plate (7).

Next, a screw (not shown) is inserted into a through hole (not shown) formed in a key portion of the upper front and rear rod (1c), and the seat plate (7) is inserted.
To the upper front and rear rods (1c).

Although illustration is omitted, if nuts are buried in the back of the seat plate (7) in advance, the seat (A) can be bolted to the upper front and rear rods (1c) in the same manner as described above. Easy and correct installation.

[0030]

When the seat of the chair according to the present invention is mounted on the leg frame as described above, the leg frame to which the front horizontal rod is previously assembled is used.
After placing the leg frame upside down on the upside down seat, advance the leg frame along the side ridges until the front horizontal rod abuts the hanging piece of the seat plate. Since the positioning is performed correctly, the seat can be easily and correctly attached to the leg frame without using a dedicated jig or the like.

According to a second aspect of the present invention, when the cover of the seat portion is attached to the seat plate, the peripheral portion of the cover can be connected to the peripheral portion of the seat plate and the leg by the weight of the occupant when the user sits on the product chair. Because it is strongly clamped between the left and right side frame rods and the front side rod, the cover may expand and contract due to the weight of the occupant, or the cover may peel off from the seat plate due to rough operation during sitting. Absent.

According to a third aspect of the present invention, when the side ridges and the front ridge are formed, each of the ridges can be reduced in weight without deteriorating the strength, and the number of the bottom ridges can be reduced. The horizontal surface and the hanging pieces facilitate positioning in the front-rear direction when the seat is attached to the two leg frames.

If a plurality of reinforcing ridges having a large number of bottomed holes are formed on the lower surface of the seat plate, the seat plate can be reduced in weight without deteriorating the strength. it can.

[Brief description of the drawings]

FIG. 1 is a side view of a chair to which a seat according to the present invention is attached.

FIG. 2 is a front view of the chair of FIG. 1;

FIG. 3 is a plan view showing a right half of a seat plate in the seat portion of the present invention.

FIG. 4 is a vertical sectional view taken along line IV-IV in FIG.

FIG. 5 is a vertical sectional view taken along line VV in FIG. 3;

FIG. 6 is a right half arrow view taken along the line VI-VI in FIG. 4;

FIG. 7 is a central longitudinal side view of the seat of the present invention.

8 is a right half vertical sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a right half plan view of the rear horizontal rod.

[Explanation of symbols]

 (A) Seat (1) Leg frame (1a) Front vertical rod (1b) Rear vertical rod (1c) Upper front and rear rod (2) Front horizontal rod (3) Rear cover (4) Engagement hole (5) Backrest frame (6) Backrest (7) Seat plate (8) Front ridge (9) Bottom hole (10) Hanging piece (11) Horizontal surface (12) Side ridge (13) Bottom hole (14) Rear Ridge (15) Reinforcement rib (17) Engagement piece (18) Cushion material (19) Cover

Claims (4)

(57) [Claims] 1. A seat portion of a chair mounted above a pair of left and right leg frames which are substantially square in side view and a front horizontal bar connecting the front upper portions of both leg frames, Slightly inward from the outer edge of the side frame, a side ridge on which the inner surfaces of the upper and lower rods of the upper frame of the two leg frames can abut is provided vertically, and the upper surface of the front horizontal rod of the leg frame is provided at the lower front end of the seat plate A seat portion of a chair, characterized in that a front ridge that abuts with the front surface is provided vertically. 2. The chair seat according to claim 1, wherein the peripheral edge of the cover in the seat is bonded to both side edges of the lower surface of the seat plate, the rear end and the lower surface of the front ridge. 3. The side ridge and the front ridge are provided with a number of bottomed holes that are open on the upper surface, a hanging piece is provided at the front end of the lower surface of the front ridge, and a horizontal surface is provided behind the hanging piece. Item 3. The seat of the chair according to item 1 or 2. 4. A plurality of reinforcing ridges which are oriented in the left-right direction and are spaced apart in the front-rear direction on the lower surface of the seat plate, and each reinforcing ridge is provided with a number of bottomed holes which are open on the upper surface. 1 to
3. The seat of the chair according to any one of 3.