JP3736585B2 - Chair seat and back tilting device - Google Patents
Chair seat and back tilting device Download PDFInfo
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- JP3736585B2 JP3736585B2 JP22365096A JP22365096A JP3736585B2 JP 3736585 B2 JP3736585 B2 JP 3736585B2 JP 22365096 A JP22365096 A JP 22365096A JP 22365096 A JP22365096 A JP 22365096A JP 3736585 B2 JP3736585 B2 JP 3736585B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、脚柱の上端に固定した基枠に、上部に背凭れを備える背杆の下部を後方に回動可能に軸支し、背杆回動と連動して、上部に座席を備える座席受体を基枠に対して移動させるようにした椅子の座席と背凭れの傾動装置に関する。
【０００２】
【従来の技術】
従来、この種の装置において、背杆と座席受体とが摺動可能に取り付けたものでは、座席受体の左右の側壁のそれぞれに長孔を穿設し、この長孔に、内部に軸受用の長孔を有する同形状の合成樹脂材料製の軸受部材を嵌合し、背杆に穿設した軸孔と前記軸受部材の長孔とに軸を挿通して、座席受体と背杆とを連結したものが知られている。
【０００３】
【発明が解決しようとする課題】
上述の従来装置において、座席受体が鋼板製のものでは、合成樹脂材料製の軸受部材は、左右の側壁のそれぞれに穿設した長孔に、鋼板の板厚のみで保持されているため、座席と背凭れの傾動時の繰り返し荷重を軸受部材が受けると、軸受部材に破損や変形によるがたつきが発生し易いという問題点があった。
【０００４】
本発明は、このような問題点を解決するため、軸受部材の破損や変形によるがたつきが起きにくいように、強度の向上を図るとともに、背杆と座席受体とのがたつきの防止、及び組立性の向上を図った椅子の座席と背凭れの傾動装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明によると、上記課題は、次のようにして解決される。
(１) 脚柱の上端に固定した基枠に、上部に背凭れを備える背杆の下部を後方に回動可能に軸支し、前記背凭れの回動と連動して、上部に座席を備える座席受体を前記基枠に対して移動させるようにした椅子の座席と背凭れの傾動装置において、座席受体の左右の側壁のそれぞれに、縁部が筒状をなして外向きに突出するバーリング孔を穿設し、このバーリング孔に、軸受孔を有し、かつ前記バーリング孔と同形状同寸法の小径部と、この小径部より大きな大径部とを有する合成樹脂材料製の軸受部材を、前記両側壁の内方より前記小径部を外側として嵌合し、左右の軸受部材の大径部内側面に前記背杆の左右両側部を当接させて配設するとともに、背杆の左右両側部の軸孔に、外側に突出するバーリング部を設け、軸受部材の大径部に、前記バーリング部の突出長さと等しい張り出し部を形成し、前記背杆の左右両側部に穿設した軸孔と前記軸受部材の軸受孔とに軸を挿通して、前記背杆と前記座席受体とを連結する。
【０００６】
(２) 上記(１)項において、バーリング孔と、それに嵌合される軸受部材の小径部及び軸受孔が長円形をなし、この長円形の軸受孔内を軸が、長円形の長軸方向に摺動しうるようにする。
【０００７】
(３) 上記(１)または(２)項において、背杆の左右両側部の内側に、基枠に支持される内部軸受部材を嵌合する。
【０００８】
(４) 上記(１)〜 ( ３ ) 項のいずれかにおいて、軸受部材の小径部の先端部に、バーリング孔からの抜け止め用の小突起を形成する。
【０００９】
【発明の実施の形態】
図９は、本発明を適用した椅子の概略構成を示すもので、キャスタ(１)を備えた脚部(２)には、ガススプリングを内蔵した脚柱(３)が固定されており、脚柱(３)の上端には、基枠(４)が取り付けられている。
【００１０】
図９と、その要部の分解斜視図である図１に示すように、基枠(４)には、上部に図示しない座席を備えた座席受体(５)、及び上部に図示しない背凭れを備えた背杆(10)が、３つの連結部(Ａ)(Ｂ)(Ｃ)により連結されている。
【００１１】
すなわち、座席受体(５)は、基枠(４)に形成した長孔(６)と座席受体(５)に形成した長孔(７)とに摺動自在に嵌合した前後１対の軸(８)(９)をもって、基枠(４)に支持されている。
【００１２】
後部の軸(９)は、背杆(10)の前端に穿設した軸孔(13)（図１参照）に挿通され、この背杆(10)の中間部に突設した軸(11)は、座席受体(５)の後部両側部に形成した長孔(12)に嵌合されている。
【００１３】
このような長孔と軸とによる連結部の構成は、着座者が背凭れに寄りかかる時、座席受体(５)を、背凭れ、従って背杆(10)の後方への回動と連動して、後ろに移動しながら後ろに傾く運動をさせるためであり、着座者は、骨盤の近傍（Ｐ点）を中心に後ろに無理なく回転する。またこの際、座席の運動中心(Ｑ)は、着座者の足の踝の位置に近づくので、下腿部が上方に引っ張り上られることがない。
【００１４】
図１に示すように、前述の連結部(Ｂ)の長孔(６)は、基枠(４)の左右両側の上縁に形成された傾斜面(14)と、座席受体(５)を挟んで基枠(４)の上面を覆う取付板(15)の下面に形成された傾斜面(16)とにより形成されている。軸(８)には、軸受部材(17)を嵌合させ、この軸受部材(17)の左右両端の上下面を、上下の傾斜面(16)(14)とに摺動可能に当接させている。
【００１５】
連結部(Ｃ)では、座席受体(５)の左右の両側壁に穿設した長孔(12)の内側から、合成樹脂材料製の長円形の軸受部材(18)が挿入されている。長孔(12)は、外方に突出する長円形の筒状のバーリング部(12a)（図４参照）を有するバーリング孔である。
【００１６】
軸受部材(18)は、図２及び図３に示すように、長円形の軸受孔(19)を有し、外面には、長孔(12)に嵌合する長孔(12)と同形同寸法の小径部(20)と、この小径部(20)よりも大きい大径部(21)とを有している。
なお、符号(22)は、肉抜き部を、また、符号(23)は、小径部(20)の先端に形成された長孔(12)からの抜け止め用の小突起を示す。
【００１７】
このような軸受部材(18)の小径部(20)は、座席受体(５)の内側から長孔(12)に、小突起(23)がバーリング部(12a)の端縁に係合するまで挿入されている。
【００１８】
座席受体(５)の左右の両側壁に取り付けられた軸受部材(18)の大径部(21)の間には、背杆(10)の左右両側部が、その軸孔(24)を整合させて嵌合される。
軸孔(24)は、図４に示すように、内方に突出するバーリング部(24a)を備えた円形のバーリング孔である。
【００１９】
このように左右に配置された軸受部材(18)の軸受孔(19)及び背杆(10)の軸孔(24)に、一端に頭部(11a)を有する軸(11)が挿通され、その他端は、係止リング又はかしめにより抜け止めされている。この状態を、図４に拡大して示している。
【００２０】
連結部(Ａ)では、連結部(Ｃ)と同様に、座席受体(５)の左右の両側壁に穿設した長孔(７)は、図８に示すように、外方に突出する長円形の筒状のバーリング部(7a)を備えたバーリング孔であり、ここに合成樹脂材料製の長円形の軸受部材(25)の小径部(26)が嵌合されている。
【００２１】
軸受部材(25)は、前述の軸受部材(18)と同様な構成のものであり、図５、図６及び図７に示すように、長円形の軸受孔(27)、小径部(26)、大径部(28)、小突起(29)を有するほか、大径部(28)の両端部に斜めに対向して突出する張り出し部(30)が形成されている。
【００２２】
背杆(10)の軸孔(13)は、外方に突出するバーリング部(13a)を備えたバーリング孔であり、図８に示すように、外向きに突出するバーリング部(13a)は、軸受部材(25)の張り出し部(30)の内方に突出する空間内に収容されている。
【００２３】
背杆(10)の左右両側面の間には、座席の荷重を基枠(４)に伝達するための内部軸受部材(31)が嵌合される。
【００２４】
頭部(9a)を有する軸(９)は、軸受部材(25)の長円形の軸受孔(27)、背杆(10)の軸孔(13)、内部軸受部材(31)を挿通して、係止リングまたはかしめにより抜け止めされている。
【００２５】
【発明の効果】
本発明によれば、合成樹脂材料製の軸受部材の小径部をバーリング部の内周全体で受けることとなり、軸受部材の破損や変形によるがたつきが起きにくく、強度的な向上を図ることができるとともに、組立性の向上を図ることができる。
また、背杆の左右両側部の軸孔を、外側に突出するバーリング部を有するものとし、軸受部材の大径部に前記バーリング部の突出長さに等しい張り出し部を形成すると、基枠に支持される内部軸受部材の両側面を、背杆の内側面に当接させることができ、連結構造の強化、及びがたつきの減少を図ることができる。
【００２６】
請求項２記載の発明のような構成とすると、軸が軸受部材の長円形の軸受孔に沿って円滑に摺動することができる。
【００２７】
請求項３記載の発明のように、背杆の左右両側部の内側に、基枠に支持される内部軸受部材を配設すると、座席に加わる荷重を、この連結部の軸及び内部軸受部材を介して基枠に直接に伝達することができる。
【００２８】
請求項４記載の発明のように、軸受部材の小径部の先端部に、抜け止め用の小突起を形成すると、軸の挿入前に軸受部材を座席受体に仮止めすることができる。
【図面の簡単な説明】
【図１】 本発明の一実施例を備えた椅子の主要部分を分解して示す斜視図である。
【図２】 図１に示す座席受体と背杆との後部の連結部に用いる長円形の軸受部材の拡大斜視図である。
【図３】 図２のIII-III線に沿う断面図である。
【図４】 後部の連結部の拡大縦断面図である。
【図５】 図１に示す座席受体と背杆との前部の連結部に用いる長円形の軸受部材の拡大斜視図である。
【図６】 図５に示す長円形の軸受部材の、図５とは反対側の拡大斜視図である。
【図７】 図５のVII-VII線に沿う断面図である。
【図８】 前部の連結部の拡大断面図である。
【図９】 本発明を適用した椅子の背凭れの傾動時における各部の運動を説明する概略構成図である。
【符号の説明】
(Ａ)(Ｂ)(Ｃ)連結部
(１)キャスタ
(２)脚部
(３)脚柱
(４)基枠
(５)座席受体
(６)長孔
(７)長孔（バーリング孔）
(7a)バーリング部
(８)(９)軸
(10)背杆
(11)軸
(11a)頭部
(12)長孔（バーリング孔）
(12a)バーリング部
(13)軸孔（バーリング孔）
(13a)バーリング部
(14)傾斜面
(15)取付板
(16)傾斜面
(17)軸受部材
(18)軸受部材
(19)軸受孔
(20)小径部
(21)大径部
(22)肉抜き部
(23)小突起
(24)軸孔（バーリング孔）
(24a)バーリング部
(25)軸受部材
(26)小径部
(27)軸受孔
(28)大径部
(29)小突起
(30)張り出し部
(31)内部軸受部材[0001]
BACKGROUND OF THE INVENTION
In the present invention, a base frame fixed to the upper end of a pedestal is pivotally supported so that a lower part of a backrest with a backrest can be rotated rearward, and a seat is provided at an upper portion in conjunction with the backrest rotation. The present invention relates to a chair seat and a backrest tilting device in which a seat receiver is moved with respect to a base frame.
[0002]
[Prior art]
Conventionally, in this type of device, when a backrest and a seat receiver are slidably mounted, a long hole is formed in each of the left and right side walls of the seat receiver, and a bearing is provided inside the long hole. The same shape synthetic resin material bearing member having a long hole for use is fitted, and the shaft is inserted into the shaft hole drilled in the dorsal fin and the long hole of the bearing member, so that the seat receiver and the dorsal fin What is connected with is known.
[0003]
[Problems to be solved by the invention]
In the above-described conventional apparatus, when the seat receiver is made of a steel plate, the bearing member made of a synthetic resin material is held only in the thickness of the steel plate in the long holes drilled in each of the left and right side walls. When the bearing member receives a repeated load during tilting of the seat and the backrest, there is a problem that the bearing member is likely to be rattled due to breakage or deformation.
[0004]
In order to solve such problems, the present invention aims to improve the strength so that rattling and deformation of the bearing member are less likely to occur, and prevents rattling between the backrest and the seat receiver, An object of the present invention is to provide a seat for a chair and a tilting device for a backrest with improved assembly.
[0005]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) On the base frame fixed to the upper end of the pedestal, the lower part of the dorsal part with the backrest is pivotally supported so that it can be rotated rearward. In a tilting device for a seat and a backrest of a chair in which the seat receiver is moved with respect to the base frame, the edges of each of the left and right side walls of the seat receiver protrude outwardly in a cylindrical shape. A bearing made of a synthetic resin material having a bearing hole in the burring hole, a small diameter portion having the same shape and the same size as the burring hole, and a large diameter portion larger than the small diameter portion The members are fitted with the small diameter part outside from the inside of the both side walls, and the left and right side parts of the dorsal fin are in contact with the large diameter inner surfaces of the left and right bearing members , and The shaft holes on the left and right sides are provided with burring portions protruding outward, and the large diameter portion of the bearing member Forming a protruding length equal overhang of-ring portion, wherein the shaft hole bored in the right and left side portions of the back rod and the bearing hole of the bearing member and inserting the shaft, and the back rod and said seat receptacle Are connected.
[0006]
(2) In the above item (1), the burring hole, the small diameter portion of the bearing member fitted to the burring hole, and the bearing hole have an oval shape, and the axis in the oval bearing hole is an oval major axis direction. To be able to slide.
[0007]
(3) In the above item (1) or (2), the inner bearing member supported by the base frame is fitted inside the left and right side portions of the dorsal fin .
[0008]
(4) In any one of the above items (1) to ( 3 ) , a small protrusion for preventing the burring hole from coming off is formed at the tip of the small diameter portion of the bearing member .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 9 shows a schematic configuration of a chair to which the present invention is applied. A leg column (3) with a built-in gas spring is fixed to a leg (2) provided with a caster (1). A base frame (4) is attached to the upper end of the column (3).
[0010]
As shown in FIG. 9 and FIG. 1 which is an exploded perspective view of the main part thereof, the base frame (4) includes a seat receiver (5) having a seat (not shown) on the upper part, and a backrest (not shown) on the upper part. The dorsal fin (10) provided with is connected by three connecting portions (A), (B) and (C).
[0011]
That is, the seat receiver (5) has a pair of front and rear slidably fitted into a long hole (6) formed in the base frame (4) and a long hole (7) formed in the seat receiver (5). These shafts (8) and (9) are supported by the base frame (4).
[0012]
The rear shaft (9) is inserted into a shaft hole (13) (see FIG. 1) drilled in the front end of the dorsal fin (10), and a shaft (11) protruding from the middle portion of the dorsal fin (10). Are fitted in long holes (12) formed on both sides of the rear part of the seat receiver (5).
[0013]
The structure of the connecting part by such a long hole and the shaft is interlocked with the seat receiver (5) when the occupant leans against the backrest, and the backrest and thus the backrest (10) is rotated backward. This is because the seat occupant rotates backwards about the vicinity of the pelvis (point P) around the pelvis. At this time, the movement center (Q) of the seat approaches the position of the heel of the seated person's foot, so that the lower leg is not pulled upward.
[0014]
As shown in FIG. 1, the long hole (6) of the connecting part (B) has an inclined surface (14) formed on the upper edges of the left and right sides of the base frame (4), and a seat receiver (5). And an inclined surface (16) formed on the lower surface of the mounting plate (15) covering the upper surface of the base frame (4). The shaft (8) is fitted with a bearing member (17), and the upper and lower surfaces of the left and right ends of the bearing member (17) are slidably brought into contact with the upper and lower inclined surfaces (16) and (14). ing.
[0015]
In the connecting portion (C), an oval bearing member (18) made of a synthetic resin material is inserted from the inside of the long hole (12) drilled in the left and right side walls of the seat receiver (5). The long hole (12) is a burring hole having an oval cylindrical burring portion (12a) (see FIG. 4) protruding outward.
[0016]
2 and 3, the bearing member (18) has an oval bearing hole (19), and the outer surface has the same shape as the long hole (12) fitted into the long hole (12). A small-diameter portion (20) having the same dimensions and a large-diameter portion (21) larger than the small-diameter portion (20) are provided.
Reference numeral (22) indicates a thinned portion, and reference numeral (23) indicates a small protrusion for retaining from the long hole (12) formed at the tip of the small diameter portion (20).
[0017]
Such a small diameter portion (20) of the bearing member (18) is engaged with the long hole (12) from the inside of the seat receiver (5), and the small protrusion (23) is engaged with the edge of the burring portion (12a). Has been inserted.
[0018]
Between the large-diameter portion (21) of the bearing member (18) attached to the left and right side walls of the seat receiver (5), the left and right sides of the backpack (10) have their shaft holes (24). Align and fit.
As shown in FIG. 4, the shaft hole (24) is a circular burring hole provided with a burring portion (24a) protruding inward.
[0019]
The shaft (11) having the head (11a) at one end is inserted into the bearing hole (19) of the bearing member (18) and the shaft hole (24) of the dorsal fin (10) arranged on the left and right in this way, The other end is prevented by a locking ring or caulking. This state is shown enlarged in FIG.
[0020]
In the connecting portion (A), as in the connecting portion (C), the long holes (7) drilled in the left and right side walls of the seat receiver (5) project outward as shown in FIG. A burring hole provided with an oval cylindrical burring portion (7a), into which a small diameter portion (26) of an oval bearing member (25) made of a synthetic resin material is fitted.
[0021]
The bearing member (25) has the same configuration as the above-described bearing member (18), and as shown in FIGS. 5, 6, and 7, an oval bearing hole (27), a small diameter portion (26). In addition to the large-diameter portion (28) and the small protrusion (29), an overhang portion (30) projecting obliquely opposite to both ends of the large-diameter portion (28) is formed.
[0022]
The shaft hole (13) of the dorsal fin (10) is a burring hole provided with a burring portion (13a) protruding outward. As shown in FIG. 8, the burring portion (13a) protruding outward is The bearing member (25) is housed in a space projecting inwardly of the overhanging portion (30).
[0023]
An inner bearing member (31) for transmitting the load of the seat to the base frame (4) is fitted between the left and right side surfaces of the backpack (10).
[0024]
The shaft (9) having the head (9a) is inserted through the oval bearing hole (27) of the bearing member (25), the shaft hole (13) of the dorsal fin (10), and the internal bearing member (31). It is prevented from coming off by a locking ring or caulking.
[0025]
【The invention's effect】
According to the present invention, the small diameter portion of the bearing member made of a synthetic resin material is received by the entire inner periphery of the burring portion, and rattling or deformation of the bearing member is unlikely to occur, and the strength can be improved. In addition, it is possible to improve the assemblability.
Also, the shaft holes on both the left and right sides of the dorsal fin shall have burring portions protruding outwards, and if the overhanging portion equal to the protruding length of the burring portion is formed on the large diameter portion of the bearing member, it will be supported by the base frame Both side surfaces of the inner bearing member to be made can be brought into contact with the inner surface of the dorsal fin, so that the connection structure can be strengthened and rattling can be reduced.
[0026]
If it is the structure like invention of
[0027]
When the internal bearing member supported by the base frame is disposed inside the left and right side portions of the backpack as in the invention described in
[0028]
If the small protrusion for retaining is formed at the tip of the small diameter portion of the bearing member as in the invention described in
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a main part of a chair provided with an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of an oval bearing member used for a rear connecting portion between the seat receiver and the backrest shown in FIG. 1;
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is an enlarged longitudinal sectional view of a rear connecting portion.
FIG. 5 is an enlarged perspective view of an oval bearing member used for a front connecting portion between the seat receiver and the backrest shown in FIG. 1;
6 is an enlarged perspective view of the oval bearing member shown in FIG. 5 on the opposite side to FIG. 5;
7 is a cross-sectional view taken along line VII-VII in FIG.
FIG. 8 is an enlarged cross-sectional view of a front connecting portion.
FIG. 9 is a schematic configuration diagram for explaining the movement of each part when the backrest of the chair to which the present invention is applied is tilted.
[Explanation of symbols]
(A) (B) (C) Connecting part
(1) Casters
(2) Leg
(3) pedestal
(4) Base frame
(5) Seat receptacle
(6) Long hole
(7) Long hole (burring hole)
(7a) Burring part
(8) (9) axis
(10) dorsal fin
(11) axis
(11a) Head
(12) Long hole (burring hole)
(12a) Burring part
(13) Shaft hole (burring hole)
(13a) Burring part
(14) Inclined surface
(15) Mounting plate
(16) Inclined surface
(17) Bearing member
(18) Bearing member
(19) Bearing hole
(20) Small diameter part
(21) Large diameter part
(22) Meat removal part
(23) Small protrusion
(24) Shaft hole (burring hole)
(24a) Burring part
(25) Bearing member
(26) Small diameter part
(27) Bearing hole
(28) Large diameter part
(29) Small protrusion
(30) Overhang
(31) Internal bearing member
Claims (4)
座席受体の左右の側壁のそれぞれに、縁部が筒状をなして外向きに突出するバーリング孔を穿設し、このバーリング孔に、軸受孔を有し、かつ前記バーリング孔と同形状同寸法の小径部と、この小径部より大きな大径部とを有する合成樹脂材料製の軸受部材を、前記両側壁の内方より前記小径部を外側として嵌合し、左右の軸受部材の大径部内側面に前記背杆の左右両側部を当接させて配設するとともに、背杆の左右両側部の軸孔に、外側に突出するバーリング部を設け、軸受部材の大径部に、前記バーリング部の突出長さと等しい張り出し部を形成し、前記背杆の左右両側部に穿設した軸孔と前記軸受部材の軸受孔とに軸を挿通して、前記背杆と前記座席受体とを連結したことを特徴とする椅子の座席と背凭れの傾動装置。A base frame fixed to the upper end of the pedestal supports the lower part of the backrest with a backrest on the upper part so that the lower part of the backrest can be pivoted backwards. In the tilting device for the seat and back of the chair that moves the body relative to the base frame,
A burring hole is formed in each of the left and right side walls of the seat receiver, the edge of which forms a cylindrical shape and protrudes outward. The burring hole has a bearing hole and has the same shape as the burring hole. A bearing member made of a synthetic resin material having a small-diameter portion with a size and a large-diameter portion larger than the small-diameter portion is fitted with the small-diameter portion outside from the inside of the both side walls, and the large-diameter of the left and right bearing members The left and right side portions of the dorsal fin are in contact with each other on the inner side surface, and the burring portions projecting outward are provided in the shaft holes on both the left and right side portions of the dorsal fin. Forming an overhanging portion equal to the protruding length of the portion, inserting a shaft through the shaft hole drilled in the left and right side portions of the backpack and the bearing hole of the bearing member, and connecting the backrest and the seat receiver A chair seat and back tilting device characterized by being connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22365096A JP3736585B2 (en) | 1996-08-26 | 1996-08-26 | Chair seat and back tilting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22365096A JP3736585B2 (en) | 1996-08-26 | 1996-08-26 | Chair seat and back tilting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1057180A JPH1057180A (en) | 1998-03-03 |
| JP3736585B2 true JP3736585B2 (en) | 2006-01-18 |
Family
ID=16801515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22365096A Expired - Fee Related JP3736585B2 (en) | 1996-08-26 | 1996-08-26 | Chair seat and back tilting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3736585B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5884428B2 (en) * | 2011-11-16 | 2016-03-15 | 株式会社イトーキ | Chair back pivoting device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5619886Y2 (en) * | 1976-11-24 | 1981-05-12 | ||
| JPS5752861U (en) * | 1980-09-12 | 1982-03-26 | ||
| JPH0546978Y2 (en) * | 1988-08-05 | 1993-12-09 | ||
| JPH082328B2 (en) * | 1991-11-08 | 1996-01-17 | チトセ株式会社 | Chair with backrest |
-
1996
- 1996-08-26 JP JP22365096A patent/JP3736585B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1057180A (en) | 1998-03-03 |
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