JP4202689B2 - Chair seat structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat structure (including a backrest) for a chair in which an elastically deformable net member or a peripheral portion of a porous sheet member is attached to a seat frame.
[0002]
[Prior art]
A seat structure of a chair in which an elastically deformable net member made of a high-tensile plastic material or the like, or a peripheral edge portion of a porous sheet member, is attached to a seat frame that is usually rectangular.
[0003]
[Problems to be solved by the invention]
The frame rod in the seat frame usually has a square cross section, and the upper surface to support the periphery of the net member or porous sheet member is generally flat.
[0004]
Therefore, the peripheral part of the net member (hereinafter including the porous sheet member) is abutted and polymerized over the entire upper surface or front surface of the seat frame, and when the load of the seated person is applied to the net member, the net member is bent, The peripheral edge strongly comes into contact with the upper peripheral surface or the inner peripheral corner of the front surface of the frame frame constituting the seat frame.
[0005]
Therefore, stress is concentrated and applied to the inner peripheral corner of the frame collar, and this part is worn or damaged. It will be uncomfortable for the person.
[0006]
Also, the net member is easy to bend, and the slack net member with use gives an uncomfortable feeling and instability to the occupant, and the perimeter of the slack net member is along the inner peripheral corner of the frame rod. Since it is bent and recessed, this bent portion is conspicuous and the appearance is damaged.
[0007]
Furthermore, in the seat of the conventional chair which fixed the peripheral part of the net member to the seat frame, since the inner surface of the seat frame can be seen through the net member, the appearance is not good.
[0008]
[Means for Solving the Problems]
An object of the present invention is to solve the above-described problems in the seat structure of a chair in which the peripheral edge of a net member is fixed to a seat frame, and specific means are as follows.
(1) In a seat structure of a chair in which a net member (including a porous sheet member) is stretched on the upper surface of the seat frame, the seat frame has a thick rigid portion on the outer peripheral portion, and an inner peripheral portion on the upper surface. Further, an elastically deformable thin overhanging piece that is inclined inwardly in a gentle downward arcuate shape is provided over the entire circumference, and the outer side of the overhanging piece extends from the inner peripheral edge thereof. By providing a large number of cut grooves or flexible grooves facing each other, a portion between adjacent cut grooves or flexible grooves is made into a flexible tongue piece, and the thickness of the flexible tongue piece is adjusted in the distal direction. towards gradually small city, further the protruding piece at the front of the seat frame, large cities than Zhang pieces at the rear of the seat frame, the upper surface and the outer surface of the rigid portion of the upper surface and the seat frame of the protruding piece and The peripheral part of the net member is stretched over the area, and in the unsitting state, the peripheral part of the net member is separated from the upper surface of the protruding piece. The seated state, the periphery of the net member is such that can contact with the upper surface of the protruding tabs.
[0009]
( 2 ) In the above item ( 1 ) , a stop hole that is slightly wider than the cut groove for preventing the cut from progressing is provided at the back end of the cut groove.
[0010]
( 3 ) In the above ( 1 ) or ( 2 ) , a drag thick wall portion is provided on the inner peripheral edge of the overhanging piece.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is equally applicable to the seat (B) and backrest (C) of the chair (A) shown in FIGS. 1 and 2, but this is hereinafter applied to the seat (B). This will be described with reference to FIGS.
[0012]
The seat sheet (B) is a net member made of a high-tensile synthetic resin having a shape size corresponding to the upper surface and the outer surface of the peripheral portion of the closed frame-shaped seat frame (1) having a desired shape. The peripheral edge of 2) is superposed, and the fastening frame (3) having a flat shape corresponding to the underside of the seat frame (1) is superposed and fastened.
[0013]
The seat frame (1) is made of hard plastic or an appropriate metal, and has a gentle downward circular arc on the entire inner periphery of the upper surface of the thick rigid portion (4) provided on the outer periphery. A slightly thin elastic overhanging piece (5) inclined inward and downward is continuously provided. As shown in FIG. 5, the protruding piece (5a) at the front portion of the seat frame (1) is larger than the protruding piece (5b) at the rear portion of the seat frame.
[0014]
Flexible the protruding tab (5), by providing a plurality of cutting grooves (6) facing the outer, between the adjacent cut-out groove (6) (6) may resiliently where the downward It is as a tongue piece (7).
[0015]
In order to obtain the desired flexibility of the flexible tongue piece (7), its thickness may be gradually reduced toward the distal end.
[0016]
In addition, a circular stop hole (8) having a diameter larger than its width is provided at the back end of each cut groove (6) in order to prevent the cut advance.
[0017]
It is preferable to provide a drag thick wall portion (9) for maintaining rigidity and reinforcing at the leading edge of the overhanging piece (5) and each flexible tongue piece (7).
[0018]
The vertical position, inclination direction, inclination and curvature, rigidity, and the like of the downward arcuate projecting piece (5) at each inner peripheral part of the seat frame (1) are the same as the horizontal stretched on the seated state when not seated. A slight gap is formed between the net member (2) and the net member (2) in the seated state, and the net member (2) bends downward due to the weight of the seated person in the seated state. It is determined to contact the upper surface of 5).
[0019]
A screw hole (10) is formed from a lower surface at a suitable position of the thick rigid portion (4) on the outer periphery.
[0020]
The notch groove (6) is not limited to a slit shape, and may be a flexible tongue piece (7) as a plurality of flexible grooves having a V-shaped cross section.
[0021]
The fastening frame (3) is formed by molding plastic, and the upper surface is between the lower surface of the thick outer peripheral rigid part (4) of the seat frame (1) and the periphery of the net member (2). The portion is shaped so that it can be sandwiched gradually.
[0022]
An insertion hole (12) for a bolt (11) is formed at a location corresponding to the screw hole (10) of the seat frame (1) in the tightening frame (3).
[0023]
To assemble, the net member (2) is superposed on the seat frame (1), and the periphery of the net member (2) is moved downward along the rigid portion (4) on the outer periphery of the seat frame (1). After bending, the bottom edge of the net member (2) is bent by overlapping with the lower surface of the rigid portion (4) on the outer periphery of the seat frame (1) and then contacting the fastening frame (3) from below. Then, the bolt (11) inserted into the insertion hole (12) is screwed into the screw hole (10) on the lower surface of the seat frame (1).
[0024]
Thus, the peripheral portion of the net member (2) is supported by the outer rigid portion (4) via the upper surface of the elastically bendable protruding piece (5), and at this time, the net member (2) As shown in FIG. 4, a considerable gap is formed between the peripheral portion and the upper surface of the inner peripheral portion of the overhanging piece (5).
[0025]
When a seated person's load acts, as shown in FIG. 5, the peripheral part of a net member (2) will incline downward, will contact | abut to an overhang | projection piece (5), and will be elastically supported.
[0026]
【The invention's effect】
The effects of the invention described in each claim are as follows.
Claim 1: Since the peripheral part of the net member is stretched in a horizontal state above the projecting piece, the appearance in the unseat state is good, and when the seat member is loaded on the net member, FIG. As shown in FIG. 2, the peripheral portion of the net member is inclined to repress the overhanging piece, and moderate elasticity and restoring force are given to the net member.
Further, due to the presence of the overhanging piece, the rigid portion on the outer periphery of the seat frame that supports the protruding piece is not directly seen through the net member, and the appearance is good.
[0027]
Furthermore, since the flexible tongue piece is bent by the seated person, the seated person is comfortably supported via the net member and the flexible tongue piece .
[0028]
According to the second aspect of the present invention , the cut groove on the side of the flexible tongue piece is cut deeper than a certain level and the protruding piece is not damaged by repeated use.
[0029]
Claim 3: supporting the occupant at the inner periphery of the projecting pieces, so carried out with a suitable reaction, occupant can obtain the stability and comfort.
[Brief description of the drawings]
FIG. 1 is a front view of a chair to which an embodiment of the present invention is applied.
FIG. 2 is a side view of the same.
FIG. 3 is a lower exploded perspective view of one embodiment of the chair seat structure of the present invention.
FIG. 4 is a longitudinal side view of the chair seat structure according to the embodiment of the present invention when not in use.
FIG. 5 is a longitudinal side view of the chair seat structure according to the embodiment of the present invention when used.
[Explanation of symbols]
(A) Chair
(B) Seat seat
(C) Back support
(1) Seat frame
(2) Net members
(3) Tightening frame
(4) Rigid part
(5) Elastic overhanging piece
(6) Cut groove
(7) Flexible tongue
(8) Stop hole
(9) Drag thick section
(10) Screw hole
(11) Bolt
(12) Insertion hole

Claims (3)

In the seat structure of a chair in which a net member (including a porous sheet member) is stretched on the upper surface of the seat frame, the seat frame has a thick rigid portion on the outer peripheral portion, and all the inner peripheral portion on the upper surface. An elastically deformable thin-walled projecting piece that is inclined inwardly in a gentle downward arcuate shape is provided over the circumference, and the projecting piece has a large number of facing outwards from its inner periphery. By providing a cut groove or a flexible groove, a portion between adjacent cut grooves or flexible grooves is made a flexible tongue piece, and the thickness of this flexible tongue piece is gradually increased toward the distal end. small city, further the protruding piece at the front of the seat frame, large cities than Zhang pieces at the rear of the seat frame, over the upper surface and an outer surface of the rigid portion of the upper surface and the seat frame of the protruding tab The peripheral part of the net member is stretched, and when not seated, the peripheral part of the net member is separated from the upper surface of the overhanging piece. In the state, the peripheral portion of the net member, the seat structure of the chair, characterized in that as can contact with the upper surface of the protruding tabs. The back end of the cut groove, the seat structure according to claim 1, wherein the chair, characterized in somewhat by providing a wider stop hole than cut groove for notch is prevented from traveling. The seat structure of the chair according to claim 1 or 2 , wherein a drag thick wall portion is provided on an inner peripheral edge of the projecting piece.

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