JPS6237492Y2

JPS6237492Y2 -

Info

Publication number: JPS6237492Y2
Application number: JP18626380U
Authority: JP
Priority date: 1980-12-24
Filing date: 1980-12-24
Publication date: 1987-09-24
Also published as: JPS57107444U

Description

【考案の詳細な説明】椅子の背もたれは、使用する人の体格や好みに
より、あるいは作業内容もしくは使用目的等によ
り、最適の傾斜角度がある。[Detailed description of the invention] The backrest of the chair has an optimal inclination angle depending on the physique and preferences of the user, the work content, the purpose of use, etc.

そのため、傾斜角度を調節可能にした椅子があ
るが、従来の調節装置は、構成が複雑であつた
り、取扱いが面倒であつたり、使用中固定ねじが
弛んで、背もたれが急に傾動するという欠点があ
つた。 For this reason, there are chairs with adjustable inclination angles, but conventional adjustment devices have the drawbacks of complex configurations, cumbersome handling, and the possibility that the fixing screws loosen during use, causing the backrest to tilt suddenly. It was hot.

本考案は、上述の欠点を解消した背もたれの傾
斜角度調節装置に関するもので、以下添付の図面
に基いて具体的に説明する。 The present invention relates to a backrest inclination angle adjusting device that eliminates the above-mentioned drawbacks, and will be described in detail below with reference to the accompanying drawings.

第１図は、本考案装置を使用した回転椅子を示
すもので、１は背もたれ、２は、背もたれ１を支
持する背杆、３は座席、４は、前後方向を向いて
座席３支持する支基、５は脚杆、６は脚である。 Fig. 1 shows a rotating chair using the device of the present invention, in which 1 is a backrest, 2 is a backrest that supports the backrest 1, 3 is a seat, and 4 is a support that supports the seat 3 facing in the front-rear direction. The base, 5 is the leg rod, and 6 is the leg.

支基４は、正面形Ｕ字状に屈曲され、その垂直
をなす両側片４ａの後端には、支基４の底片４ｂ
の後縁を越えて後方に突出する挟持片７が延設さ
れている。 The support base 4 is bent into a U-shape from the front, and a bottom piece 4b of the support base 4 is attached to the rear end of the vertical side pieces 4a.
A clamping piece 7 extends beyond the rear edge of the housing and projects rearward.

第２図及び第３図に示すように、背杆２の下部
には、平面形がほぼ前向Ｕ字形をなす取付金具８
の基部８ａが固着され、取付金具８の側片８ｂの
中央上部は、挟持片７の後上部内面に、水平ピン
９をもつて枢支されている。 As shown in FIGS. 2 and 3, a mounting bracket 8 whose planar shape is approximately U-shaped facing forward is attached to the lower part of the back rod 2.
The base 8a of the mounting bracket 8 is fixed, and the upper center of the side piece 8b of the mounting bracket 8 is pivotally supported on the rear upper inner surface of the clamping piece 7 with a horizontal pin 9.

１０は、側面形ほぼ下向三角形状の調節金具
で、その後下方に向つて傾斜する前縁には、鋸歯
状段部１１が切設され、同じく下端には、重錘１
２が取付けられている。 Reference numeral 10 denotes an adjustment fitting having a substantially downward triangular shape on the side, and a sawtooth step 11 is cut into the front edge which slopes downward, and a weight 1 is provided at the lower end.
2 is installed.

調節金具１０の後上角部は、支基４の両挟持片
７，７の後下部に切設された、上記ピン９を中心
とする円弧孔１３と、取付金具８の両側片８ｂの
中央下部に突設された通孔へ遊嵌した水平ボルト
１４、および袋ナツト１５をもつて、取付金具８
の内側方に枢支され、同じく鋸歯状段部１１の適
所は、支基４の底片４ｂの後縁に係合している。 The upper rear corner of the adjustment fitting 10 has an arcuate hole 13 centered on the pin 9 cut into the rear lower part of both the clamping pieces 7, 7 of the support base 4, and the center of both side pieces 8b of the mounting fitting 8. With the horizontal bolt 14 loosely fitted into the through hole protruding from the lower part and the cap nut 15, the mounting bracket 8 is attached.
The serrated step portion 11 is pivoted inwardly, and a proper portion of the serrated step portion 11 engages with the rear edge of the bottom piece 4b of the support base 4.

上述の状態において、袋ナツト１５を締付けれ
ば、調節金具１０は、取付金具８の両側片８ｂ，
８ｂの前部において固定されるので、支基４の底
片４ｂの後縁に鋸歯状段部１１の水平縁と垂直縁
が当接している背もたれ１は、前方揺動と後方揺
動が共に阻止されて、固定保持される。 In the above state, if the cap nut 15 is tightened, the adjustment fitting 10 will be moved between the side pieces 8b of the mounting fitting 8,
Since the backrest 1 is fixed at the front part of the support base 4, the horizontal and vertical edges of the serrated step 11 are in contact with the rear edge of the bottom piece 4b of the support base 4, so that both forward and backward rocking are prevented. and held fixed.

背もたれ１を、さらに前傾させるには、袋ナツ
ト１５を弛めて、背もたれ１を前方に揺動させ
る。すると、調節金具１０は若干後退して、支基
４の底片４ｂより離れるとともに、自重により下
方に回動し、上方の段部１１が、支基４の中央片
４ｂの後端が係合するので、その状態で袋ナツト
１５を締付ければよい。 To further tilt the backrest 1 forward, loosen the cap nut 15 and swing the backrest 1 forward. Then, the adjustment fitting 10 moves back slightly and separates from the bottom piece 4b of the support base 4, and rotates downward due to its own weight, so that the upper step 11 engages the rear end of the center piece 4b of the support base 4. Therefore, it is sufficient to tighten the cap nut 15 in this state.

背もたれ１をさらに後傾させるには、袋ナツト
１５を弛め、調節金具１０を持ち上げて係合を解
除しつつ、背もたれ１を希望の角度まで後方に揺
動させ、調節金具１０を底片４ｂに係合させて、
袋ナツト５を締付ければよい。 To further tilt the backrest 1 backwards, loosen the cap nut 15, lift the adjustment fitting 10 to disengage it, and swing the backrest 1 backwards to the desired angle. engage,
All you have to do is tighten the cap nut 5.

上記重錘１２は、調節金具１０の自重による下
向回動を容易とするためのもので、ばねをもつて
代えたり、あるいは省略して実施することもあ
る。 The weight 12 is used to facilitate downward rotation of the adjustment fitting 10 due to its own weight, and may be replaced with a spring or may be omitted.

本考案装置は、椅子使用中に絶えず背もたれ１
が受ける後向荷重が、ボルト１４より、調節金具
１０を介して、水平方向を向く支基４の底片４ｂ
に伝達され、かつ鋸歯状段部１１の垂直縁が、直
角方向を向いているので、調節金具１０が回動し
たり、袋ナツト１５が弛んだりする恐れはなく、
たとえ袋ナツト１５の締付けが弱い場合でも、使
用中に背もたれ１が急に後向傾動することはな
い。 The device of the present invention constantly presses the backrest 1 while using the chair.
The backward load received by the bolt 14 is applied to the bottom piece 4b of the support base 4 facing in the horizontal direction via the adjustment fitting 10.
Since the vertical edges of the serrated step portions 11 are oriented at right angles, there is no risk that the adjustment fitting 10 will rotate or the cap nut 15 will loosen.
Even if the cap nut 15 is weakly tightened, the backrest 1 will not suddenly tilt backward during use.

また、上述で明らかなように、本考案装置は、
構成と操作が共に簡単である。 Furthermore, as is clear from the above, the device of the present invention:
Both configuration and operation are simple.

なお、支基４の両挟持片７，７の後下部を適宜
の形状に切欠することにより、円弧孔１３を省略
することもできる。 Note that the arcuate hole 13 can be omitted by cutting the rear lower portions of both the clamping pieces 7, 7 of the supporting base 4 into an appropriate shape.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本考案装置を使用した回転椅子の側
面図、第２図は、第１図の要部拡大縦断側面図、
第３図は、第２図におけるＡ−Ａ線横断面図であ
る。１背もたれ、２背杆、３座席、４支基、４ａ側
片、４ｂ底片、５脚杆、６脚、７挟持片、８取付
金具、８ａ基部、８ｂ側片、９ピン、１０調節金
具、１１鋸歯状段部、１２重錘、１３円弧孔、１
４ボルト、１５袋ナツト。 Fig. 1 is a side view of a rotary chair using the device of the present invention, Fig. 2 is an enlarged longitudinal sectional side view of the main part of Fig. 1,
FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2. 1 backrest, 2 back rod, 3 seats, 4 support bases, 4a side pieces, 4b bottom pieces, 5 leg rods, 6 legs, 7 clamping pieces, 8 mounting brackets, 8a base, 8b side pieces, 9 pins, 10 adjustment brackets, 11 serrated steps, 12 weights, 13 arc holes, 1
4 bolts, 15 bags of nuts.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

椅子の座席を支持する、正面形がＵ字形をなす
支基の両側片の後端に、後方に突出する挟持片を
延設し、両挟持片の後上部間に、背もたれ支持用
背杆の下端に固設した、平面形前向Ｕ字形の取付
金具の両側片の上部を枢支し、かつ両挟持片の後
下部に穿設した前記枢支部を中心とする円弧孔
と、取付金具の両側片の下部に穿設した通孔へ挿
通した水平ボルトの中央部に、前縁に後下方に向
かつて傾斜する鋸歯状段部を切設した調節金具の
後部上端を枢支するとともに、前記水平ボルトに
ナツトを螺合して締付けることにより、調節金具
を、取付金具を介して締付けて固定しうるように
し、さらに、調節金具における前記鋸歯状段部の
適所を、上記支基の底片の後縁に係合させてなる
椅子における背もたれの傾斜角度調節装置。 At the rear ends of both sides of the support base, which supports the seat of the chair and whose front face is U-shaped, clamping pieces projecting rearward are provided, and between the rear upper parts of both clamping pieces, a back rod for supporting the backrest is installed. The upper parts of both sides of the planar, forward-facing U-shaped mounting bracket fixedly attached to the lower end are pivotally supported, and the circular arc hole centered on the pivot part, which is drilled in the rear lower part of both clamping pieces, and the mounting bracket The rear upper end of the adjustment fitting, which has a sawtooth step section inclined rearward and downward on the front edge, is pivotally supported in the center of the horizontal bolt inserted into the through hole drilled in the lower part of both sides. By threading and tightening the nuts on the horizontal bolts, the adjusting fitting can be tightened and fixed through the mounting fitting, and furthermore, the serrated step portion of the adjusting fitting can be placed in the appropriate position on the bottom piece of the support base. A device for adjusting the inclination angle of a backrest of a chair, which is engaged with the rear edge of the chair.