JP4491123B2 - Chair backrest mounting structure - Google Patents
Chair backrest mounting structure Download PDFInfo
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- JP4491123B2 JP4491123B2 JP2000329905A JP2000329905A JP4491123B2 JP 4491123 B2 JP4491123 B2 JP 4491123B2 JP 2000329905 A JP2000329905 A JP 2000329905A JP 2000329905 A JP2000329905 A JP 2000329905A JP 4491123 B2 JP4491123 B2 JP 4491123B2
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- Prior art keywords
- dorsal fin
- peripheral surface
- contact
- backrest
- mounting structure
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Description
【０００１】
【発明の属する技術分野】
本発明は、合成樹脂製の背もたれ板を、金属製の背杆に取り付けるようにした椅子の背もたれ取付構造に関する。
【０００２】
【従来の技術】
従来の椅子の背もたれ取付構造の代表的なものでは、合成樹脂製の背もたれ板の左右に筒状部を設け、この筒状部に、椅子の後部左右両側に設けた上方を向く金属パイプ製の背杆を嵌合するとともに、背もたれ板と背杆とをリベットをもって固定することにより、背もたれ板を背杆に取り付けるようになっている（例えば、実開昭５９−２１２６０号公報参照）。
【０００３】
【発明が解決しようとする課題】
しかし、上述のような従来の背もたれ取付構造によると、背もたれ板を背杆にがたつくことがないように取り付けるには、背杆を筒状部に圧入しなければならないため、背もたれ板の取り付け及び取り外しが困難であるという問題がある。
【０００４】
本発明は、従来の技術が有する上記のような問題点に鑑み、合成樹脂製の背もたれ板を、容易に、しかも確実に背杆に取り付け及び取り外しができるようにするとともに、背もたれ及び背杆の破損のおそれを防止しうるようにした椅子の背もたれ取付構造を提供することを目的としている。
【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)椅子の後両側部に設けた金属製の背杆を、合成樹脂製の背もたれ板の両側下部に設けた筒状部に嵌合して、前記背もたれ板を前記背杆に取り付けるようにした椅子の背もたれ取付構造において、前記筒状部の内周面の前後に、前記背杆の外周面と当接しかつ前後方向に対峙する１対の当接部を、また同じく内周面の左右に、前記背杆の外周面と当接しない非当接部をそれぞれ設け、かつ前記筒状部と背杆とを、前記１対の当接部のうち一方の前記当接部の中央に設けた取付孔を通して前記背杆に設けた着脱可能な止着手段をもって固定する。
【０００６】
(２) 上記(１)項において、筒状部の内周面の上部に、内方に突出し、かつ背杆の上端に当接しうるストッパーを設ける。
【０００７】
【発明の実施の形態】
以下、本発明の一実施形態を図面に基づいて説明する。
図１は、本発明の一実施形態を備える椅子の正面図、図２は、同じく側面図を示す。
【０００８】
(１)は、図２に示すように、金属の丸パイプ材を、側面から見て、倒立後向Ｌ字状に折曲してなる左右１対の前脚で、その後端部には、金属の丸パイプからなる後脚(２)の上部が、溶接により固着されている。
【０００９】
左右の前脚(１)及び後脚(２)の上部同士は、座席(３)を支持するための左右方向の連結杆(４)(４)によって連結されている。
【００１０】
左右の後脚(２)の上部に固着された連結金具(５)には、金属の丸パイプからなる背杆(６)の下部が適宜支持されている。左右の背杆(６)の上部には、背もたれ板(７)が取り付けられ、また同じく外周面の後側には、図３及び図４に示すように、止着手段をなすねじ(８)が螺合しうる雌ねじ孔(９)が設けられている。
【００１１】
背もたれ板(７)は、硬質合成樹脂材料により射出成形したもので、その左右両側下部には、下方が開口して、背杆(６)の上部を下方より挿入しうる上下方向を向く筒状部(10)が形成されている。
【００１２】
図４及び図５に示すように、筒状部(10)の内周面の前後には、内方に突出し、かつ背杆(６)の外周面に当接しうる当接部(11)が、また同じく内周面の左右には、背杆(６)の外周面との間に隙間(Ａ)が形成されるように凹んで、背杆(６)の外周面に当接しない非当接部(12)が、それぞれ上下方向に沿って設けられている。図３及び図４に示すように、筒状部(10)の後側の下部には、ねじ挿通用の取付孔(10a)が穿設されている。
【００１３】
前後方向に対峙する当接部(11)(11)の間隔は、背杆(６)の外径とほぼ同一とするか、もしくは背杆(６)が圧入されうる程度に背杆(６)の外径より僅かに小としておくのがよい。
【００１４】
背もたれ板(７)を背杆(６)に取り付けた状態においては、前後の当接部(11)が背杆(６)の外周面に当接することによって、着座者の後向荷重による背もたれ板(７)のがたつきを抑えることができるとともに、その荷重に対して十分に耐えることができる。
【００１５】
なお、当接部(11)の背杆(６)に当接する当接面は、背杆(６)が筒状部(10)内において左右方向に妄りにがたつくことがないように、円弧状にするのが好ましい。
【００１６】
ねじ(８)は、取付孔(10a)へ挿通して、雌ねじ孔(９)に螺合させることによって、筒状部(10)から背杆(６)が抜け出ることがないように固定している。
【００１７】
ねじ(８)に代えて、筒状部(10)に背杆(６)を抜け止め固定しうるように、筒状部(10)及び背杆(６)に係脱可能なクリップまたはピン等を使用してもよい。
【００１８】
背杆(６)の外周面と非当接部(12)との間に、隙間(Ａ)が設けられているため、筒状部(10)が容易に弾性変形でき、背杆(６)を筒状部(10)に容易に嵌入することができる。すなわち、背杆(６)を筒状部(10)に嵌入すると、前後の当接部(11)の間隔が拡がるように、筒状部(10)が前後方向に弾性変形しうるため、背杆(６)を容易に筒状部(10)に嵌入することができる。
【００１９】
また、隙間(Ａ)によって、筒状部(10)が弾性変形し易くなることにより、筒状部(10)に作用する衝撃荷重を吸収することができ、筒状部(10)の亀裂の発生等を防止することができる。
【００２０】
筒状部(10)の内周面の上部には、図３及び図５に示すように、内方に突出して、背杆(６)の上端に当接しうる複数のストッパー(13)が設けられている。
【００２１】
背杆(６)を筒状部(10)に嵌入したとき、取付孔(10a)と雌ねじ孔(９)とが合致する位置において、ストッパー(13)は、背杆(６)の上端に当接して、背杆(６)のそれ以上の嵌挿を阻止し、背もたれ板(７)の背杆(６)に対する上下方向の位置決めをなしている。
【００２２】
上述のように、背もたれ板(７)は、両側部に形成した筒状部(10)に背杆(６)を嵌合して、ねじ(８)を締結することによって、容易に背杆(６)に取り付けられ、またねじ(８)を外すことにより、容易に背杆(６)から取り外すことができる。
【００２３】
本発明は、上記実施形態に限定されるものでない。上記実施形態においては、背杆(６)を金属の丸パイプからなるものとし、かつ筒状部(10)の内形を、背杆(６)の外形に合わせてほぼ円形としたが、それに代えて、背杆(６)を、角管または楕円管等の異形管とし、かつ筒状部(10)の内形を背杆(６)の外形に合わせるようにしても、上記と同様の効果を奏することができる。
【００２４】
【発明の効果】
本発明によれば、次のような効果を奏することができる。
(ａ) 請求項１記載の発明によると、筒状部の内周面の前後に、背杆の外周面と当接しかつ前後方向に対峙する一対の当接部を、また同じく内周面の左右に、背杆の外周面と当接しない非当接部を、それぞれ設けたことにより、筒状部への背杆の嵌入を容易にし、かつ着座者の後向き荷重による背もたれ板のがたつきを抑えることができるとともに、その荷重に対して十分に耐えることができる。
【００２５】
また、筒状部が弾性変形し易くなることにより、筒状部に作用する衝撃荷重や、筒状部と背杆との熱膨張の差を吸収することができ、筒状部の亀裂の発生等を防止することができる。
【００２６】
１対の当接部のうち一方の当接部の中央に設けた取付孔を通して背杆に設けた着脱自在な止着手段をもって筒状部と背杆とを固定することにより、筒状部を背杆に確実に抜け止め固定することができ、また、止着手段を外すことによって、背もたれ板を簡単に背杆から取り外すことができるので、廃棄時の材料の分別のための分解、及び補修等を容易におこなうことができる。
【００２７】
(ｂ) 請求項２記載の発明によると、筒状部を背杆に対して簡単に位置決めすることができ、背もたれ板の取り付けを容易におこなうことができる。
【図面の簡単な説明】
【図１】 本発明の一実施形態を備える椅子の正面図である。
【図２】 同じく、椅子の側面図である。
【図３】 同じく、図１におけるIII−III線に沿う拡大縦断側面図である。
【図４】 同じく、図３におけるIV−IV線に沿う拡大横断平面図である。
【図５】 同じく、図３におけるＶ−Ｖ線に沿う拡大横断平面図である。
【符号の説明】
(１)前脚
(２)後脚
(３)座席
(４)連結杆
(５)連結金具
(６)背杆
(７)背凭れ板
(８)ねじ（止着手段）
(９)雌ねじ孔
(10)筒状部
(10a)取付孔
(11)当接部
(12)非当接部
(13)ストッパー
(Ａ)隙間[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair backrest mounting structure in which a synthetic resin backrest plate is mounted on a metal backrest.
[0002]
[Prior art]
In a typical chair backrest mounting structure, a cylindrical portion is provided on the left and right sides of a synthetic resin backrest plate, and the cylindrical portion is made of a metal pipe that faces upward on the left and right sides of the chair. The backrest plate is attached to the backpack by fitting the backboard and fixing the backrest plate and the backboard with rivets (see, for example, Japanese Utility Model Publication No. 59-21260).
[0003]
[Problems to be solved by the invention]
However, according to the conventional backrest mounting structure as described above, in order to attach the backrest plate so as not to rattle the backrest, it is necessary to press-fit the backrest into the cylindrical portion. There is a problem that is difficult.
[0004]
The present invention has been made in view of the above-mentioned problems of the prior art, and makes it possible to easily and reliably attach and remove a synthetic resin backrest plate to and from the backrest. An object of the present invention is to provide a chair backrest mounting structure that can prevent the possibility of breakage.
[0005]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) Fit the metal dorsal plate provided on both sides of the back of the chair to the cylindrical parts provided on the lower sides of the synthetic resin back plate, and attach the back plate to the doggy. In the chair backrest mounting structure, a pair of abutting portions that are in contact with the outer peripheral surface of the back saddle and are opposed to each other in the front-rear direction are also provided on the left and right sides of the inner peripheral surface. A non-contact portion that does not contact the outer peripheral surface of the dorsal fin, and the tubular portion and the dorsal fin are provided at the center of one of the pair of contact portions. It is fixed with detachable fastening means provided on the dorsal fin through the mounting holes .
[0006]
(2) In the above item (1), a stopper that protrudes inward and can come into contact with the upper end of the dorsal fin is provided on the upper portion of the inner peripheral surface of the cylindrical portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a chair provided with an embodiment of the present invention, and FIG. 2 is a side view of the same.
[0008]
As shown in FIG. 2, (1) is a pair of left and right front legs formed by bending a metal round pipe material into an inverted L-shape when viewed from the side. The upper part of the rear leg (2) made of a round pipe is fixed by welding.
[0009]
The upper parts of the left and right front legs (1) and the rear legs (2) are connected by connecting rods (4) and (4) in the left-right direction for supporting the seat (3).
[0010]
The lower part of the backpack (6) made of a metal round pipe is appropriately supported by the connection fitting (5) fixed to the upper parts of the left and right rear legs (2). A backrest plate (7) is attached to the upper part of the left and right dorsal fins (6), and similarly, on the rear side of the outer peripheral surface, as shown in FIG. 3 and FIG. ) Is provided with a female screw hole (9) into which the screw can be screwed.
[0011]
The backrest plate (7) is injection-molded with a hard synthetic resin material. The lower part is open on the left and right sides, and the upper part of the backpack (6) can be inserted from below. A portion (10) is formed.
[0012]
As shown in FIGS. 4 and 5, there are contact portions (11) that protrude inward and can contact the outer peripheral surface of the dorsal fin (6) before and after the inner peripheral surface of the cylindrical portion (10). Also, the left and right sides of the inner peripheral surface are recessed so as to form a gap (A) between the outer peripheral surface of the dorsal fin (6) and are not abutted against the outer peripheral surface of the dorsal fin (6). The contact portion (12) is provided along the vertical direction. As shown in FIGS. 3 and 4, a mounting hole (10a) for screw insertion is formed in the lower part on the rear side of the cylindrical portion (10).
[0013]
The distance between the abutting portions (11) and (11) facing each other in the front-rear direction is substantially the same as the outer diameter of the dorsal fin (6), or the dorsal fin (6) to such an extent that the dorsal fin (6) can be press-fitted. It is better to make it slightly smaller than the outer diameter.
[0014]
In a state where the backrest plate (7) is attached to the backrest (6), the front and rear abutment portions (11) abut on the outer peripheral surface of the backrest (6), so that the backrest plate due to the backward load of the seated person It is possible to suppress the rattling of (7) and sufficiently withstand the load.
[0015]
The abutment surface of the abutment portion (11) that abuts against the dorsal fin (6) has an arc shape so that the dorsal fin (6) does not rattle in the left-right direction in the cylindrical portion (10). Is preferable.
[0016]
The screw (8) is inserted into the mounting hole (10a) and screwed into the female screw hole (9), so that the dorsal fin (6) does not come out from the tubular part (10). Yes.
[0017]
Instead of the screw (8), a clip or a pin that can be engaged with and disengaged from the tubular part (10) and the dorsal fin (6) so that the dowel (6) can be secured to the tubular part (10). May be used.
[0018]
Since the gap (A) is provided between the outer peripheral surface of the dorsal fin (6) and the non-contact portion (12), the cylindrical portion (10) can be easily elastically deformed, and the dorsal fin (6) Can be easily fitted into the cylindrical portion (10). That is, when the dorsal fin (6) is inserted into the cylindrical portion (10), the cylindrical portion (10) can be elastically deformed in the front-rear direction so that the distance between the front and rear contact portions (11) is increased. The hook (6) can be easily fitted into the cylindrical part (10).
[0019]
Further, since the cylindrical portion (10) is easily elastically deformed by the gap (A), an impact load acting on the cylindrical portion (10) can be absorbed, and cracks in the cylindrical portion (10) can be absorbed. Occurrence and the like can be prevented.
[0020]
As shown in FIGS. 3 and 5, a plurality of stoppers (13) that protrude inward and can come into contact with the upper end of the dorsal fin (6) are provided on the upper part of the inner peripheral surface of the tubular part (10). It has been.
[0021]
When the dorsal fin (6) is fitted into the tubular part (10), the stopper (13) is placed against the upper end of the dorsal fin (6) at the position where the mounting hole (10a) and the female screw hole (9) are aligned. In contact therewith, further insertion of the backrest (6) is prevented, and the backrest plate (7) is positioned in the vertical direction with respect to the backrest (6).
[0022]
As described above, the backrest plate (7) can be easily attached to the cylindrical portion (10) formed on both sides by fitting the backrest (6) and fastening the screw (8). It is attached to 6) and can be easily removed from the dorsal fin (6) by removing the screw (8).
[0023]
The present invention is not limited to the above embodiment. In the above embodiment, the dorsal fin (6) is made of a metal round pipe, and the inner shape of the cylindrical portion (10) is substantially circular according to the outer shape of the dorsal fin (6). Alternatively, the dorsal fin (6) may be a deformed tube such as a square tube or an elliptical tube, and the inner shape of the tubular portion (10) may be matched to the outer shape of the dorsal fin (6). There is an effect.
[0024]
【The invention's effect】
According to the present invention, the following effects can be achieved.
(a) According to the first aspect of the present invention, the pair of abutting portions that are in contact with the outer peripheral surface of the dorsal fin and are opposed to each other in the front-rear direction are provided on the front and rear sides of the inner peripheral surface of the cylindrical portion. Non-contact parts that do not come into contact with the outer peripheral surface of the dorsal fin are provided on the left and right sides, making it easy to fit the dorsal part into the cylindrical part and shaking the backrest plate due to the backward load of the seated person And can sufficiently withstand the load.
[0025]
In addition, since the cylindrical portion is easily elastically deformed, it is possible to absorb the impact load acting on the cylindrical portion and the difference in thermal expansion between the cylindrical portion and the dorsal fin, and the occurrence of cracks in the cylindrical portion. Etc. can be prevented.
[0026]
By fixing the tubular part and the dorsal fin with a detachable fastening means provided on the dorsal fin through a mounting hole provided in the center of one of the abutting parts, the tubular part is fixed. The backrest plate can be securely fixed to the backpack, and the backrest plate can be easily removed from the backpack by removing the fastening means, so that the material can be disassembled and repaired for disposal. Etc. can be easily performed.
[0027]
(b) According to the invention described in
[Brief description of the drawings]
FIG. 1 is a front view of a chair provided with an embodiment of the present invention.
FIG. 2 is also a side view of the chair.
3 is an enlarged longitudinal sectional side view taken along line III-III in FIG.
4 is an enlarged cross-sectional plan view taken along line IV-IV in FIG.
5 is an enlarged cross-sectional plan view taken along line VV in FIG.
[Explanation of symbols]
(1) Front legs
(2) Rear legs
(3) Seat
(4) Linkage
(5) Connecting bracket
(6) Backpack
(7) Backrest board
(8) Screw (fastening means)
(9) Female screw hole
(10) Cylindrical part
(10a) Mounting hole
(11) Contact part
(12) Non-contact part
(13) Stopper
(A) Clearance
Claims (2)
前記筒状部の内周面の前後に、前記背杆の外周面と当接しかつ前後方向に対峙する１対の当接部を、また同じく内周面の左右に、前記背杆の外周面と当接しない非当接部をそれぞれ設け、かつ前記筒状部と背杆とを、前記１対の当接部のうち一方の前記当接部の中央に設けた取付孔を通して前記背杆に設けた着脱可能な止着手段をもって固定したことを特徴とする椅子の背もたれ取付構造。A metal dovetail provided on both sides of the back of the chair is fitted to a cylindrical part provided on both lower portions of the back plate made of synthetic resin so that the back plate is attached to the doggy. In the backrest mounting structure,
Before and after the inner peripheral surface of the tubular portion, a pair of contact portions that contact the outer peripheral surface of the dorsal fin and confront each other in the front-rear direction, and also on the left and right of the inner peripheral surface, the outer peripheral surface of the dorsal fin A non-contact portion that does not contact with each other is provided, and the tubular portion and the dorsal fin are attached to the dorsal fin through a mounting hole provided in the center of one of the contact portions of the pair of contact portions. A chair backrest mounting structure characterized by being fixed with a detachable fastening means provided .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000329905A JP4491123B2 (en) | 2000-10-30 | 2000-10-30 | Chair backrest mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000329905A JP4491123B2 (en) | 2000-10-30 | 2000-10-30 | Chair backrest mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002125797A JP2002125797A (en) | 2002-05-08 |
| JP4491123B2 true JP4491123B2 (en) | 2010-06-30 |
Family
ID=18806511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000329905A Expired - Lifetime JP4491123B2 (en) | 2000-10-30 | 2000-10-30 | Chair backrest mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4491123B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4295265B2 (en) | 2005-11-04 | 2009-07-15 | 株式会社岡村製作所 | Chair backrest device |
| CA2669068A1 (en) | 2006-11-10 | 2008-05-15 | Okamura Corporation | Chair backrest device |
| JP2009195743A (en) * | 2009-06-08 | 2009-09-03 | Okamura Corp | Backrest device of chair |
| JP4932875B2 (en) * | 2009-06-08 | 2012-05-16 | 株式会社岡村製作所 | Chair backrest device |
| JP5620788B2 (en) * | 2010-10-27 | 2014-11-05 | タカノ株式会社 | Connecting structure of chair frame and tubular member |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4414104Y1 (en) * | 1966-03-29 | 1969-06-14 | ||
| JPH0629922U (en) * | 1992-09-24 | 1994-04-19 | アラコ株式会社 | Rotational hinge structure in splashed seat |
| JPH08228882A (en) * | 1995-02-27 | 1996-09-10 | Okamura Corp | Chair back rest-mounting device |
| JPH10179325A (en) * | 1996-12-20 | 1998-07-07 | Okamura Corp | Device for attaching back plate of chair |
-
2000
- 2000-10-30 JP JP2000329905A patent/JP4491123B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4414104Y1 (en) * | 1966-03-29 | 1969-06-14 | ||
| JPH0629922U (en) * | 1992-09-24 | 1994-04-19 | アラコ株式会社 | Rotational hinge structure in splashed seat |
| JPH08228882A (en) * | 1995-02-27 | 1996-09-10 | Okamura Corp | Chair back rest-mounting device |
| JPH10179325A (en) * | 1996-12-20 | 1998-07-07 | Okamura Corp | Device for attaching back plate of chair |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002125797A (en) | 2002-05-08 |
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