JP2001128805A - Seat plate of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat plate of a chair formed in such a manner that a surface skin material infiltrating the rear surface of the sat plate is surely held and that the appearance on the rear surface side of the seat plate is improved. SOLUTION: A seat part 4 has a base plate 5 which is projectingly provided with stay ribs 8a and 8b along the inner periphery of a frame-like supporting frame 3, a cushion material 8 covering the front surface side of the base plate 5 and the surface skin material 7 covering the side outer than the stay ribs 8a and 8b of the rear surfaces of the cushion material 6 and the base plate 5. The peripheral edge of the surface skin material 7 of the seat part 4 is inserted between the rear surface of the base plate 5 and the supporting frame 3 and is concealed by the supporting frame 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat plate for a chair, and more particularly to a seat plate which can be stored in a nesting state, that is, a seat plate suitably used for a chair which can be stored in the front-back direction. However, the invention can also be applied to a chair back.

[0002]

2. Description of the Related Art Conventionally, to form a seat plate, a cushion material is provided on a substrate, and the cushion material and the substrate are covered with a skin material except for a central portion of the back surface of the substrate. A method is used in which a flexible fastening string is passed through a cylindrical insertion portion formed on a side edge and tightened to thereby narrow the peripheral edge of the skin material and integrate it.

[0003]

Although such a method of forming the seat plate is rational, the insertion portion of the skin material, that is, the peripheral portion is not uniformly constricted, so that the seat plate is viewed from the back surface. If somewhat unsightly. In particular, when the chair is capable of storing nesting and is used to raise the seat plate, the appearance of the seat plate is poor because the back surface of the seat plate can be seen from the front.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a seat plate for a chair in which the skin material wrapped around the back surface of the substrate is securely held and the appearance of the back surface of the seat plate is improved. .

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) A seat plate of a chair in which a peripheral portion on the back surface side of a seat portion is placed and supported on a frame-like support frame, wherein the seat portion has a locking rib along the outer periphery of the support frame. And a cushion material covering the front side of the substrate, and a skin material covering the cushion material and a peripheral portion of the substrate. The support rib is sandwiched between the back surface of the substrate and the support frame via the tip of the stop rib, and is covered by the support frame.

(2) In the above item (1), a support rib extending along the inner periphery of the support frame protrudes from the back surface of the substrate, and the flexible rib inserted through the insertion portion formed on the peripheral edge of the skin material. By tightening the tightening string, the peripheral edge of the skin material is narrowed to the outer periphery of the support rib, so that the inward movement of the insertion portion is restricted by the support rib.

(3) In the above item (1) or (2), the seat portion and the support frame are made substantially rectangular, and a cutout portion with which the peripheral edge of the skin material can be engaged is provided at a corner of the rib.

(4) In any one of the above items (1) to (3), the support frame is attached to the legs opposed to the left and right so as to be rotatable between a substantially horizontal state and a substantially vertical state.

[0009]

FIG. 1 is a side view of a chair (A) provided with a seat plate (1) of the present invention. This chair has a seat plate (1)
It can be rotated from a substantially horizontal state (use position) indicated by a solid line to a substantially vertical state indicated by an imaginary line.

FIG. 2 is a lower perspective view showing the seat plate (1) in an exploded state. The seat plate (1) is a support frame made of a substantially square frame-like steel tube which forms an upper horizontal portion of the leg (2).
(3) and a seat (4).

The seat (4) comprises a substantially rectangular substrate (5) having a shape corresponding to the support frame (3), a cushion material (6), and a skin material (7).

The substrate (5) is an integrally molded product of a hard synthetic resin material. As shown in FIGS. 3 to 5, the central portion (6) is slightly depressed and a large number is formed in the rear half excluding the peripheral portion. The elasticity is given to the part corresponding to the buttocks of the seated person to whom weight is loaded by forming a small hole.

On the back surface of the substrate (5), support ribs (8a) and (8b) are protruded at positions along the inner periphery of the support frame (3). As shown in FIGS. 4 to 6, the supporting ribs (8 a) formed on the left and right sides and the rear of the substrate (5) are V-shaped, and the substrate (5) has a compliant property to a load. Has been granted.
The receiving rib (8b) formed on the front part of the substrate (5) is merely a protruding rib.

An engaging rib (9) protrudes from the periphery of the back surface of the substrate (5) at a position along the outer periphery of the support frame (3). The locking rib (9) presses a peripheral portion of a skin material (7) described later between the support frame (3) and tensions the skin material (7), and the skin material (7) is exposed to the outside. This is to prevent exposure.

As shown in an enlarged view in FIG. 6, a horizontal notch (10) is formed at each corner of the supporting ribs (8a) and (8b) on the substrate (5) from the middle to the base. Are drilled.

The cushion member (6) is a sheet of a suitable thickness made of a soft elastic material such as foamed polyurethane.

The skin material (7) is made of an appropriate material such as woven cloth or vinyl leather, and has a bag-like shape folded and sewn around its periphery as shown in FIGS. 2, 6 and 7. The insertion portion (7a) is formed. A flexible tightening cord (11) is inserted through the insertion portion (7a), and both ends thereof are drawn out from the middle of the insertion portion (7a).

In forming the seat (4), first, a skin material
(7) is placed upside down on an appropriate table, a cushioning material (6) is placed thereon, and the substrate (5) is placed upside down on it.

Next, as shown in FIG. 7, the entire peripheral portion of the skin material (7) is folded back to the back side of the substrate (5) through the tip of the locking rib (9), and the tightening cord ( 11) Pull both ends strongly.

Then, as shown in FIGS. 3 and 6, the tightening cord (11) narrows along the outer periphery of the supporting ribs (8a) and (8b). Into the notch (10). Insertion part of skin material (7) through which fastening cord (11) is inserted
(7a) is also dragged by the fastening string (11) and enters the notch (10). In this way, the skin material (7) wraps around the cushion material (6) and is securely locked to the back surface of the substrate (5) without slack, and the seat (4) is formed.

The seat (4) obtained in this way is shown in FIGS.
As shown in the figure, the supporting ribs (8a) and (8b) of the substrate (5) and the locking ribs
The support frame (3) is inserted between the support frame (9) and the support frame (3) and is fixed by a self-tapping screw or a bolt (12). At this time, the part of the skin material (7) that goes around the
Between the back surface of (5) and the support frame (3), and locking ribs
It is sandwiched between the inner surface of (9) and the support frame (3), so that the locking is further ensured, and the peripheral edge of the wrinkled skin material (7) is supported by the support frame (3). Hidden by

[0022]

The present invention has the following effects. According to the first aspect of the present invention, the portion of the skin material that goes around the back side of the substrate is securely interposed between the back surface of the substrate and the support frame, and the peripheral portion of the skin material is entirely covered. Since it is uniformly hidden by the support frame over the circumference, the appearance of the back surface of the seat plate is excellent.

According to the second aspect of the present invention, the cushion material is wrapped without loosening just by pulling and tightening the tightening string, and the peripheral edge of the skin material can be locked on the back side of the substrate.
Further, the fastening cord does not move inward from a certain position.

According to the third aspect of the present invention, since the fastening string and the peripheral edge of the skin material enter the notch at the corner, the locking of the skin material is further ensured.

According to the fourth aspect of the present invention, the appearance is not impaired even if the back surface of the seat plate can be seen by standing the seat plate at a substantially vertical position for nesting storage or the like.

[Brief description of the drawings]

FIG. 1 is a side view of a seat-plate rotating chair provided with a seat plate of the present invention.

FIG. 2 is an exploded bottom perspective view of the seat plate of the present invention.

FIG. 3 is a rear view of the seat plate of the present invention in an assembled state.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 3, with a part thereof omitted.

FIG. 6 is a partially enlarged lower perspective view showing a corner on the back surface of the seat.

FIG. 7 is a lower perspective view showing the back surface of the seat.

[Explanation of symbols]

 (A) Chair (1) Seat (2) Leg (3) Support frame (4) Seat (5) Substrate (6) Cushion (7) Skin material (7a) Penetration (8a) (8b) Receiving Support rib (9) Locking rib (10) Notch (11) Tightening string (12) Self-tapping screw or bolt

Claims (4)

[Claims] 1. A seat plate for a chair in which a peripheral portion on the back side of a seat is placed and supported on a frame-shaped support frame, wherein the seat is provided with a locking rib along an outer periphery of the support frame. A substrate protruding from the back surface, a cushion material covering the front surface side of the substrate, and a skin material covering the cushion material and a peripheral portion of the substrate, the periphery of the skin material of the seat portion, A seat plate for a chair, wherein the seat plate is sandwiched between a back surface of the substrate and a support frame via a tip end of the locking rib, and is covered by the support frame. 2. A support rib extending along the inner periphery of the support frame protrudes from the back surface of the substrate, and a flexible tightening string inserted through an insertion portion formed on the periphery of the skin material is tensioned. 2. The chair seat plate according to claim 1, wherein the peripheral edge of the skin material is narrowed to the outer periphery of the support rib, whereby the inward movement of the insertion portion is restricted by the support rib. 3. The chair seat according to claim 1, wherein the seat and the support frame are substantially rectangular, and a notch is provided at a corner of the rib so that a peripheral edge of the skin material can be engaged. 4. The chair seat according to claim 1, wherein the support frame is attached to the legs facing left and right so as to be rotatable between a substantially horizontal state and a substantially vertical state.