JP2005065764A - Armrest mounting structure for chair - Google Patents
Armrest mounting structure for chair Download PDFInfo
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- JP2005065764A JP2005065764A JP2003209407A JP2003209407A JP2005065764A JP 2005065764 A JP2005065764 A JP 2005065764A JP 2003209407 A JP2003209407 A JP 2003209407A JP 2003209407 A JP2003209407 A JP 2003209407A JP 2005065764 A JP2005065764 A JP 2005065764A
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- armrest
- mounting
- hole
- backrest
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、座の側方より起立する背杆に、肘掛けを取付けるようにした、椅子における肘掛け取付構造に関する。
【0002】
【従来の技術】
従来、座の両側方より起立するパイプ状の背杆に背シェルを取付け、背シェルの両側に、前方を向く肘掛けを取付けた椅子は公知である。この従来の肘掛け取付構造は、背杆の上部に横向きのねじ挿入孔を設け、この背杆に嵌合される肘掛け杆に、横向きの雌ねじ部材を設け、ねじ挿入孔と雌ねじ部材とを整合させて、肘掛けを背杆にねじ止めしている(例えば、特許文献1参照)。
【0003】
【特許文献1】
特開平2002−125798号公報(図3、要約)
【0004】
【発明が解決しようとする課題】
上記のような従来の肘掛け取付構造は、ねじ止めのために、背杆のねじ挿入孔と肘掛け杆の雌ねじ部材とを完全に整合させる必要があり、この位置合わせが複雑で、組み付け作業に時間がかかるという問題があった。
【0005】
本発明は、従来の技術が属する上述のような問題点に鑑みてなされたもので、肘掛けの背杆に対する位置決めが容易で、組み付けを簡単かつ短時間で行えるようにした椅子における肘掛け取付構造を提供することを目的としている。
【0006】
【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)座の両側から起立する背杆の上端部に背凭れの両側部を取付けるとともに、前記背杆の上端に非円形軸を突設し、この非円形軸に、ほぼ前方を向く肘掛けの後端部の取付部に設けた非円形孔を相対回転不能として嵌合し、かつねじ止めする。
【0007】
(2)上記(1)項において、パイプにより形成されるとともに、上端開口部の一部に凹部が形成された背杆の上端部に、非円形軸の下端に円柱部を連設し、かつ前記円柱部の外周の一部に位置決め用突起が突設された取付軸における前記円柱部を、前記位置決め用突起が前記凹部に係合するようにして嵌合することにより、背杆の上端部に非円形軸を突設する。
【0008】
(3)上記(2)項において、背杆の上部外周部に、取付軸の円柱部と背杆とを溶接するための透孔を設ける。
【0009】
(4)上記(3)項において、背杆の上部外周部に固着され、かつ背凭れを支持するブラケットの取付部に、透孔を露呈させるための切欠部を設ける。
【0010】
(5)上記(1)〜(4)項のいずれかにおいて、非円形軸の上端にねじ孔を設け、かつ肘掛けの取付部の上端に設けたねじ挿通孔に挿通した止めねじを前記ねじ孔に螺合することにより、肘掛けを非円形軸に固定する。
【0011】
(6)上記(1)〜(5)項のいずれかにおいて、肘掛けの取付部の外周面に、椅子のスタッキング時のスペーサとなる突部を設ける。
【0012】
【発明の実施の形態】
以下、本発明の一実施形態である椅子における肘掛け取付構造を、図1〜図7を参照しながら説明する。
【0013】
図1は、本発明の肘掛け取付構造を備える椅子の正面図、図2は、側面図である。
図1に示すように、本発明の椅子における肘掛け取付構造が適用された椅子(A)は、左右1対の背杆(1)(1)と、各背杆(1)の中間部に固定され、逆L字状に屈折された左右1対の前脚(3)と、この前脚(3)(3)上に取付けられた座(4)と、両背杆(1)(1)の上端部に両側部が取付けられた背シェル(5)と、各背杆(1)の上端に取付けられた肘掛け(2)とを備えている。この肘掛け(2)は、次のようにして取付けられている。
【0014】
図3は、肘掛けを取付ける前の状態を示す分解斜視図である。
図3に示すように、背杆(1)の上端部には、肘掛け(2)を取付けるための取付軸(5)が設けられ、背杆(1)の上端部には、背凭れを形成する背シェル(9)が取付けられている。取付軸(5)は後述のように非円形のもので、この取付軸(5)に肘掛け(2)を嵌合し、ねじ止めするようになっている。
【0015】
図4は、背杆(1)、取付軸(5)および背シェル取付け用のブラケット(20)の詳細を示す分解斜視図、図5は肘掛け(2)を下側から見た斜視図である。
【0016】
図4に示すように、背杆(1)は円筒状のパイプで構成され、上端の縁の一部に位置決め用の凹部(19)が形成されている。背杆(1)の上端寄りの側部には、溶接のための透孔(6)が形成されている。取付軸(5)は、円柱部(7)と、この円柱部(7)の上端に、この円柱部(7)より径の小さい円柱の両側を切削して平削面(8a)とした非円形軸(8)とを備えている。円柱部(7)の上端面には、非円形軸(8)の下端部の周囲にテーパ面(10)が形成され、このテーパ面(10)上に、一側方に突出する位置決め用突起(11)が形成されている。非円形軸(8)の上端にはねじ孔(12)が設けられている。
【0017】
図1及び図3に示すように、肘掛け(2)は、肘掛け本体(14)の基部に、上下方向を向く円筒状の取付部(15)が形成されたものである。図5に示すように、この取付部(15)の下端には、非円形軸部(8)とほぼ補形をなす非円形孔(16)が上方に向かって形成されるとともに、下端部の縁の一部には、上記突起(11)と係合する切欠部(17)が形成されている。取付部(15)の一側部には、椅子をスタッキング(複数段に積み上げること)した時のスペーサとなる上下方向に長い突部(18)が形成されている。また、取付部(15)の上面には、非円形孔(16)に連通する小径のねじ挿通孔(16a)が穿設されている。
【0018】
図6は、背杆にブラケットを取付けた状態の平面図、図7は正面図、図8は側面図である。
図4、および図6〜図8に示すように、ブラケット(20)は、板状の基片(20a)の一側端に取付取付部(21)がほぼ直角に折曲形成され、この取付部(21)の中間に切欠部(22)が形成され、かつ、基片(20a)には、背シェル取付け用の取付孔(23)が形成されたものである。
【0019】
ブラケット(20)および肘掛け(2)の組み付けは、次のようにして行われる。
【0020】
まず、取付軸(5)の位置決め用突起(11)が背杆(1)の凹部(19)に係合するようにして、背杆(1)の上端に取付軸(5)を嵌合する。これにより、取付軸(5)の上下方向および周方向の位置決めが行われる。なお、位置決め用突起(11)は、凹部(19)の深さより若干高寸であり、凹部(19)から若干上部に突出している。次いで、透孔(6)の部分で溶接を行うことにより、背杆(1)に取付軸(5)を固着する。
【0021】
次に、背杆(1)の透孔(6)に切欠部(22)が一致するようにして、ブラケット(20)の取付部(21)を背杆(1)の外周面に当接させることにより、ブラケット(20)の取付け位置が決められる。次いで取付部(21)と背杆(1)との当接部分を溶接する。図7および図8に示す交差斜線部分(25)が、溶接部分である。この状態で、ブラケット(20)の上端は非円形軸(8)の途中まで上方に突出し、この突出部分と非円形軸(8)との間には隙間(24)が形成される。
【0022】
次いで、図3に示すように、肘掛け(2)を非円形軸(8)に嵌め込む。これにより、取付部(15)の凹部(19)は突起(11)に係合する。なお、非円形軸(8)の周方向の向きで肘掛け(2)の方向は決まるので、凹部(19)と突起(11)との係合はなくてもよい。肘掛け(2)の取付部(15)の上端から止めねじ(26)をねじ挿通孔(16a)に挿通し、かつ非円形軸(8)のねじ孔(12)に螺挿し、固定する。
【0023】
上記の実施形態では、取付軸(5)を透孔(6)を介して先に溶接し、その後にブラケット(20)を溶接しているが、逆に、ブラケット(20)を先に溶接し、その後に透孔(6)を介して取付軸(5)を溶接するようにしてもよい。取付軸(5)を先に溶接すると透孔(6)の部分に溶接による盛り上りができるが、切欠部(22)でこれを逃すことができる。また、ブラケット(5)を先に溶接した場合は、切欠部(22)で透孔(6)が開放されているので、後から透孔(6)を介して取付軸(5)の溶接を行うことが可能となる。
【0024】
図9は、椅子(A)をスタッキングした状態の側面図である。スタッキング状態では、隣接する肘掛けの取付部(15)(15)同士が、スペーサとなる突部(18)を介して互いに当接することにより、座(4)等が硬質部分に接触することが避けられ、擦れによる傷等を防止できる。
【0025】
【発明の効果】
(A)請求項1記載の発明によると、背杆の上端に突起した非円形軸に、肘掛けの取付部に設けた非円形孔を嵌合することにより、肘掛けは背杆に対して簡単に位置決めされ、肘掛けの組立て作業が簡単に短時間で行える。
【0026】
(B)請求項2記載の発明によると、背杆に対する対する非円形軸の向き、ひいては肘掛けの向きを、取付軸における円柱部に設けた位置決め突起を、背杆の上端開口縁の一部に設けた凹部に係合させることにより、簡単に割り出すことができ、肘掛けの組立て作業が楽になる。
【0027】
(C)請求項3記載の発明によると、透孔を介して、取付軸の円柱部を、背杆に簡単に溶接することができるとともに、溶接部分が外部に露呈することがなく、体裁がよい。
【0028】
(D)請求項4記載の発明によると、ブラケットに、透孔を露呈させるための切欠部を形成したので、ブラケットを取付けた後でも透孔を介して取付軸の溶接が可能となる。
【0029】
(E)請求項5記載の発明によると、1本の止めねじだけで肘掛けを背杆に強固に固着でき、またこれを外すことにより、肘掛けを背杆から容易に取外すことができる。
【0030】
(F)請求項6記載の発明によると、肘掛けの取付部の外周面にスペーサ用の突部を設けたので、この突部が椅子のスタッキング時のスペーサとなり、座等が他の椅子の硬質部分に当接するのを防止し、座のクッション性の劣化や擦れによる傷等を防止することができる。
【図面の簡単な説明】
【図1】本発明の一実施形態を備える椅子の正面図である。
【図2】同じく、側面図である。
【図3】同じく、肘掛けを取付ける前の状態を示す分解斜視図である。
【図4】同じく、背杆、取付軸および背シェル取付け用のブラケットの詳細を示す分解斜視図である。
【図5】同じく、肘掛けを下側から見た斜視図である。
【図6】同じく、背杆にブラケットを取付けた状態の平面図である。
【図7】同じく、正面図である。
【図8】同じく、内方より見たに側面図である。
【図9】同じく、椅子をスタッキングした状態の側面図である。
【符号の説明】
(1)背杆
(2)肘掛け
(3)前脚
(4)座
(5)取付軸
(6)ねじ挿通孔
(7)円柱部
(8)非円形軸
(8a)平削面
(9)背シェル(背凭れ)
(10)テーパ面
(11)位置決め用突起
(12)ねじ孔
(14)肘掛け本体
(15)取付部
(16)非円形孔
(16a)ねじ挿通孔
(17)切欠部
(18)突部
(19)凹部
(20)ブラケット
(20a)基片
(21)取付部
(22)切欠部
(23)取付孔
(24)隙間
(25)交差線部
(26)止めねじ
(28)弾性係止片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest mounting structure for a chair, in which an armrest is mounted on a backrest standing upright from a side of a seat.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a chair in which a back shell is attached to a pipe-like dowel standing from both sides of a seat and armrests facing forward are attached to both sides of the back shell is known. In this conventional armrest mounting structure, a lateral screw insertion hole is provided in the upper part of the dorsal fin, a lateral female screw member is provided in the armrest saddle that is fitted to the dorsal fin, and the screw insertion hole and the female screw member are aligned. The armrest is screwed to the dorsal fin (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-125798 (FIG. 3, summary)
[0004]
[Problems to be solved by the invention]
In the conventional armrest mounting structure as described above, it is necessary to perfectly align the screw insertion hole of the back and the female screw member of the armrest for screwing, and this alignment is complicated and time is required for assembly work. There was a problem that it took.
[0005]
The present invention has been made in view of the above-mentioned problems to which the prior art belongs, and is provided with an armrest mounting structure in a chair that can be easily positioned with respect to the backrest of the armrest and can be easily assembled in a short time. It is intended to provide.
[0006]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) Attach both sides of the backrest to the upper end of the dorsal stand standing from both sides of the seat, and project a non-circular shaft on the upper end of the dorsal fin. A non-circular hole provided in the attachment portion at the rear end is fitted so as not to be relatively rotatable and is screwed.
[0007]
(2) In the above item (1), a cylindrical part is continuously provided at the lower end of the non-circular shaft at the upper end part of the dorsal fin formed with a pipe and having a recess formed in a part of the upper end opening part, and By fitting the columnar portion of the mounting shaft, in which a positioning projection protrudes from a part of the outer periphery of the columnar portion, with the positioning projection engaging with the concave portion, the upper end portion of the dorsal fin A non-circular shaft is projected on
[0008]
(3) In the above item (2), a through hole for welding the columnar portion of the mounting shaft and the dorsal fin is provided in the upper outer periphery of the dorsal fin.
[0009]
(4) In the above item (3), a notch for exposing the through hole is provided in the mounting portion of the bracket that is fixed to the upper outer peripheral portion of the backrest and supports the backrest.
[0010]
(5) In any one of the above items (1) to (4), a screw hole is provided at the upper end of the non-circular shaft, and a set screw inserted through a screw insertion hole provided at the upper end of the armrest mounting portion is the screw hole. The armrest is fixed to the non-circular shaft by screwing into the non-circular shaft.
[0011]
(6) In any one of the above items (1) to (5), a protrusion serving as a spacer when stacking the chair is provided on the outer peripheral surface of the armrest mounting portion.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an armrest mounting structure in a chair according to an embodiment of the present invention will be described with reference to FIGS.
[0013]
FIG. 1 is a front view of a chair provided with the armrest mounting structure of the present invention, and FIG. 2 is a side view.
As shown in FIG. 1, the chair (A) to which the armrest mounting structure in the chair of the present invention is applied is fixed to a pair of left and right dorsal fins (1) and (1) and intermediate portions of the respective dorsal fins (1). A pair of left and right front legs (3) refracted in an inverted L shape, a seat (4) mounted on the front legs (3) and (3), and upper ends of both dorsal fins (1) and (1) A back shell (5) having both side parts attached to the part, and an armrest (2) attached to the upper end of each backpack (1). This armrest (2) is attached as follows.
[0014]
FIG. 3 is an exploded perspective view showing a state before the armrest is attached.
As shown in FIG. 3, a mounting shaft (5) for mounting an armrest (2) is provided at the upper end of the backrest (1), and a backrest is formed at the upper end of the backrest (1). A back shell (9) is attached. The mounting shaft (5) is non-circular as described later, and an armrest (2) is fitted to the mounting shaft (5) and screwed.
[0015]
FIG. 4 is an exploded perspective view showing details of the backpack (1), the mounting shaft (5), and the bracket (20) for mounting the back shell, and FIG. 5 is a perspective view of the armrest (2) as viewed from below. .
[0016]
As shown in FIG. 4, the dorsal fin (1) is constituted by a cylindrical pipe, and a positioning recess (19) is formed in a part of the edge of the upper end. A through hole (6) for welding is formed on the side near the upper end of the backpack (1). The mounting shaft (5) is a non-circular surface (8a) formed by cutting both sides of a cylindrical portion (7) and a cylinder having a smaller diameter than the cylindrical portion (7) at the upper end of the cylindrical portion (7). And an axis (8). A tapered surface (10) is formed on the upper end surface of the cylindrical portion (7) around the lower end portion of the non-circular shaft (8), and a positioning projection protruding on one side on the tapered surface (10). (11) is formed. A screw hole (12) is provided at the upper end of the non-circular shaft (8).
[0017]
As shown in FIGS. 1 and 3, the armrest (2) is formed by forming a cylindrical attachment portion (15) facing the vertical direction at the base of the armrest body (14). As shown in FIG. 5, a non-circular hole (16) substantially complementary to the non-circular shaft portion (8) is formed at the lower end of the mounting portion (15) upward, A notch (17) that engages with the protrusion (11) is formed at a part of the edge. On one side of the attachment portion (15), a long projection (18) is formed in the vertical direction that serves as a spacer when the chair is stacked (stacked in a plurality of stages). Further, a small diameter screw insertion hole (16a) communicating with the non-circular hole (16) is formed in the upper surface of the attachment portion (15).
[0018]
6 is a plan view of a state in which a bracket is attached to the dorsal fin, FIG. 7 is a front view, and FIG. 8 is a side view.
As shown in FIGS. 4 and 6 to 8, the bracket (20) has a mounting attachment portion (21) bent at a substantially right angle at one end of a plate-like base piece (20a). A notch (22) is formed in the middle of the part (21), and a mounting hole (23) for attaching the back shell is formed in the base piece (20a).
[0019]
The bracket (20) and the armrest (2) are assembled as follows.
[0020]
First, the mounting shaft (5) is fitted to the upper end of the backpack (1) so that the positioning projection (11) of the mounting shaft (5) engages with the recess (19) of the backpack (1). . As a result, the mounting shaft (5) is positioned in the vertical direction and the circumferential direction. The positioning projection (11) is slightly larger than the depth of the recess (19) and protrudes slightly upward from the recess (19). Next, the attachment shaft (5) is fixed to the dorsal fin (1) by performing welding at the portion of the through hole (6).
[0021]
Next, the mounting portion (21) of the bracket (20) is brought into contact with the outer peripheral surface of the backpack (1) so that the notch (22) is aligned with the through hole (6) of the backpack (1). Thus, the mounting position of the bracket (20) is determined. Next, the contact portion between the attachment portion (21) and the dorsal fin (1) is welded. The cross hatched portion (25) shown in FIGS. 7 and 8 is a welded portion. In this state, the upper end of the bracket (20) protrudes upward halfway along the noncircular shaft (8), and a gap (24) is formed between the protruding portion and the noncircular shaft (8).
[0022]
Next, as shown in FIG. 3, the armrest (2) is fitted into the non-circular shaft (8). Thereby, the recessed part (19) of the attaching part (15) is engaged with the protrusion (11). Since the direction of the armrest (2) is determined by the circumferential direction of the non-circular shaft (8), the recess (19) and the protrusion (11) may not be engaged. A set screw (26) is inserted into the screw insertion hole (16a) from the upper end of the mounting portion (15) of the armrest (2) and screwed into the screw hole (12) of the non-circular shaft (8) to be fixed.
[0023]
In the above embodiment, the mounting shaft (5) is welded first through the through hole (6) and then the bracket (20) is welded. Conversely, the bracket (20) is welded first. Then, the attachment shaft (5) may be welded through the through hole (6). If the mounting shaft (5) is welded first, the through hole (6) can be swelled by welding, but this can be escaped by the notch (22). When the bracket (5) is welded first, the through hole (6) is opened at the notch (22), so that the mounting shaft (5) is welded later through the through hole (6). Can be done.
[0024]
FIG. 9 is a side view showing a state where the chair (A) is stacked. In the stacking state, the adjacent armrest mounting portions (15) and (15) are brought into contact with each other via the protrusion (18) serving as a spacer, so that the seat (4) and the like are prevented from contacting the hard portion. And scratches caused by rubbing can be prevented.
[0025]
【The invention's effect】
(A) According to the invention described in
[0026]
(B) According to the invention described in
[0027]
(C) According to the invention of
[0028]
(D) According to the invention described in
[0029]
(E) According to the invention described in
[0030]
(F) 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 a side view of the same.
FIG. 3 is an exploded perspective view showing a state before the armrest is similarly attached.
FIG. 4 is an exploded perspective view showing details of a back saddle, a mounting shaft, and a back shell mounting bracket.
FIG. 5 is a perspective view of the armrest as seen from below.
FIG. 6 is a plan view showing a state where a bracket is attached to the dorsal fin.
FIG. 7 is a front view of the same.
FIG. 8 is a side view as seen from the inside.
FIG. 9 is a side view showing a state where the chairs are similarly stacked.
[Explanation of symbols]
(1) Backrest (2) Armrest (3) Front leg (4) Seat (5) Mounting shaft (6) Screw insertion hole (7) Cylindrical part (8) Non-circular shaft (8a) Planed surface (9) Back shell ( Backrest)
(10) Tapered surface (11) Positioning projection (12) Screw hole (14) Armrest body (15) Mounting portion (16) Non-circular hole (16a) Screw insertion hole (17) Notch (18) Projection (19 ) Recess (20) Bracket (20a) Base piece (21) Mounting portion (22) Notch portion (23) Mounting hole (24) Gap (25) Crossing line portion (26) Set screw (28) Elastic locking piece
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003209407A JP4261277B2 (en) | 2003-08-28 | 2003-08-28 | Armrest mounting structure in a chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003209407A JP4261277B2 (en) | 2003-08-28 | 2003-08-28 | Armrest mounting structure in a chair |
Publications (2)
Publication Number | Publication Date |
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JP2005065764A true JP2005065764A (en) | 2005-03-17 |
JP4261277B2 JP4261277B2 (en) | 2009-04-30 |
Family
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JP2003209407A Expired - Fee Related JP4261277B2 (en) | 2003-08-28 | 2003-08-28 | Armrest mounting structure in a chair |
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JP (1) | JP4261277B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009106419A (en) * | 2007-10-29 | 2009-05-21 | Itoki Corp | Chair |
JP2014004796A (en) * | 2012-06-27 | 2014-01-16 | Aico Trading Co Ltd | Injection molding method of molded product having insert member, and backrest of pipe chair |
JP2014226327A (en) * | 2013-05-22 | 2014-12-08 | タカノ株式会社 | Chair |
-
2003
- 2003-08-28 JP JP2003209407A patent/JP4261277B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009106419A (en) * | 2007-10-29 | 2009-05-21 | Itoki Corp | Chair |
JP2014004796A (en) * | 2012-06-27 | 2014-01-16 | Aico Trading Co Ltd | Injection molding method of molded product having insert member, and backrest of pipe chair |
JP2014226327A (en) * | 2013-05-22 | 2014-12-08 | タカノ株式会社 | Chair |
Also Published As
Publication number | Publication date |
---|---|
JP4261277B2 (en) | 2009-04-30 |
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