JP3451581B2 - Chair - Google Patents
ChairInfo
- Publication number
- JP3451581B2 JP3451581B2 JP18380498A JP18380498A JP3451581B2 JP 3451581 B2 JP3451581 B2 JP 3451581B2 JP 18380498 A JP18380498 A JP 18380498A JP 18380498 A JP18380498 A JP 18380498A JP 3451581 B2 JP3451581 B2 JP 3451581B2
- Authority
- JP
- Japan
- Prior art keywords
- support shaft
- seat
- lock
- backrest
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs Characterized By Structure (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、背もたれを後傾動
自在なフリー状態と後傾動不能なロック状態とに切り換
えるためのロック装置を備えた椅子に関するものであ
る。The present invention relates are those which relate to a chair having a locking device for switching the backrest to the rear tilt non-locked state and the rear tiltable free state.
【0002】[0002]
【従来の技術・発明が解決しようとする課題】背もたれ
のロック装置は、ガスシリンダを使用したものと、回動
式又はスライド式等のロック体を使用したものとに大別
される。このうちガスシリンダを使用したロック装置
は、背もたれのロック姿勢を無段階に変更できる利点が
あるが、ガスシリンダは高価であるため椅子のコストが
嵩むという欠点があった。2. Description of the Related Art Locking devices for a backrest are roughly classified into those using a gas cylinder and those using a rotating or sliding lock body. Among them, the lock device using the gas cylinder has an advantage that the lock posture of the backrest can be changed steplessly, but it has a disadvantage that the cost of the chair increases because the gas cylinder is expensive.
【0003】他方、回動式等のロック体を使用するもの
は、部品が単純であるため製造コストを抑制できる利点
がある。しかし、ロック体を使用したロック手段は、例
えば固定式の座受け体にフック式のロック体を回動自在
に設ける一方、背もたれが取付く揺動部材に、前記ロッ
ク体が嵌脱するピンを設けておき、ロック体をピンに嵌
合させて揺動部材を後傾不能に保持するというように、
フック式等のロック体に設けた係合部をピン等の係止部
に係脱させているのであるが、強度保持のためには、ロ
ック体に設ける係合部にはある程度の大きさが必要であ
るのに対し、ロック体の個所での揺動部材等の傾動スト
ロークは僅かしかないため、ロック体に多くの係合部を
形成することができず、このため、背もたれは、せいぜ
い、非後傾状態と後傾し切った状態との2段階程度にし
かロックできないのであった。On the other hand, a rotary type lock body has an advantage that the manufacturing cost can be suppressed because the parts are simple. However, the locking means using the lock body is, for example, a hook type lock body is rotatably provided on a fixed type seat receiving body, and a pin on which the lock body is fitted / removed is attached to a swing member to which a backrest is attached. It is provided and the lock body is fitted to the pin to hold the swing member so that it cannot be tilted backward.
The engaging part provided on the hook type lock body is engaged with and disengaged from the locking part such as a pin, but in order to maintain strength, the engaging part provided on the lock body has a certain size. Although it is necessary, since the tilting stroke of the rocking member or the like at the location of the lock body is small, it is not possible to form many engaging portions on the lock body, and therefore the backrest is at most It was possible to lock it only in two stages, a non-backward tilted state and a fully tilted state.
【0004】本発明は、このような実情に鑑みなされた
もので、ロック体を使用したものでありながら、強度を
損なうことなく多段階的に背もたれをロックできるよう
にすることを目的とするものである。The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to lock the backrest in multiple stages without impairing the strength while using a lock body. Is.
【0005】[0005]
【課題を解決するための手段】本発明の椅子は、脚の上
端に設けた座受け体と、この座受け体に取付けた座体
と、前記座受け体又は座体に後傾動自在に取付けた揺動
部材と、この揺動部材に取付けた背もたれと、前記揺動
部材の後傾動を弾性的に支持するばね手段とを備えてい
る。 A chair according to the present invention is provided with a seat receiving member provided on the upper ends of legs, a seat member attached to the seat receiving member, and the seat receiving member or the seat receiving member so as to be tiltable rearward. Tei includes a swing member, a backrest attached to the swing member, and a spring means for supporting the tilting elastically after the swing member
It
【0006】そして、請求項1では、前記背もたれの後
傾動に連動して互いの間隔が変化するように相対動する
二つの軸を、それぞれ椅子の正面視で左右方向に延びる
ように配置しており、これら両軸のうち一方の軸に、ハ
ンドル等の操作具によってロック可能状態とロック不能
状態とに一斉に切り換えできる複数個の回動式ロック体
を取付け、各ロック体に、ロック可能状態で他方の軸に
係合することによって両軸を相対動不能に保持する係合
部を設け、これら各ロック体の係合部を、両軸の相対動
方向に沿って順次ずらしている。 And, in claim 1, after the backrest
Move relative to each other so that the distance between them changes in conjunction with tilting
Each of the two axes extends left and right when the chair is viewed from the front.
A plurality of rotatable lock bodies that can be simultaneously switched to a lockable state and an unlockable state by an operation tool such as a handle on one of these two shafts.
And each lock body is provided with an engagement portion that holds both shafts in a lockable state by engaging the other shaft so that they cannot move relative to each other. Movement
That are sequentially shifted along the direction.
【0007】請求項2の発明では、請求項1において、
前記座受け体の前寄り部位に、側面視で後傾方向にスラ
イド自在な第1支軸を取付け、この第1支軸に座体を回
動自在に取付けると共に、座受け体のうち前記第1支軸
よりも後方の部位に、前記揺動部材の前端を第2支軸に
よって後傾動自在に取付け、揺動部材の前後中途部と座
体とを第3支軸によって回動自在に連結し、更に、前記
座受け体に、第1支軸の後退動を支持するばねを設けて
いる。 According to the invention of claim 2, in claim 1,
At the front part of the seat receiving body, slide it backward in the side view.
Idable first support shaft is attached, and the seat is rotated around this first support shaft.
The first support shaft of the seat support body is movably mounted
The front end of the rocking member to the second support shaft at a position rearward of
Therefore, it is attached so that it can be tilted rearward, and it is attached to the middle part of the rocker member in the front-rear direction.
The body is rotatably connected by a third support shaft, and further,
Provide a spring for supporting the backward movement of the first support shaft on the seat receiving body.
There is.
【0008】そして、前記座受け体に、前記第1支軸に
係合して当該第1支軸をスライド不能に保持する係合溝
が形成された複数のロック体を、ハンドルの操作によっ
て各係合溝が第1支軸に係合し得る状態と係合不能な状
態とに回動自在に切り替わるように設け、これら各ロッ
ク体の係合溝を前後方向にずらしている。 Then, the seat support body is attached to the first support shaft.
Engagement groove that engages to hold the first support shaft in a non-sliding manner
Operate the handle to lock the multiple locks
State that each engagement groove can engage with the first support shaft
It is provided so that it can be freely rotated to
The engaging groove of the housing is displaced in the front-rear direction.
【0009】[0009]
【発明の作用・効果】この構成において、各ロック体を
ロック可能状態にすると、背もたれの姿勢に応じていず
れかのロック体が他方の軸に係合することにより、二つ
の軸が相対動不能となって背もたれは後傾動不能にロッ
クされる。従って、背もたれは、例えば、全く後傾して
いない姿勢と後傾し切った姿勢との二つの姿勢に後傾途
中の姿勢を加えた3段階以上にロックすることができ
る。In this structure, when each lock body is set in the lockable state, one of the lock bodies engages with the other shaft according to the posture of the backrest, so that the two shafts cannot move relative to each other. The backrest is locked so that it cannot be tilted backwards. Therefore, the backrest can be locked in three or more stages, for example, two postures, that is, a posture in which the backrest is not tilted at all and a posture in which the backrest is completely tilted, and a posture in the middle of the backward tilt is added.
【0010】背もたれが全く後傾していな自由姿勢では
ロック体にはばね力は作用していないので、単に操作具
を操作するだけでロック状態とフリー状態とに切り換え
ることができる。Since the spring force does not act on the lock body in a free posture in which the backrest is not tilted backward at all, it is possible to switch between the locked state and the free state by simply operating the operating tool.
【0011】他方、背もたれを後傾させた状態で操作具
を操作して各ロック体をロック可能状態に切り替える
と、背もたれを多少前後揺動させることにより、最も係
合しやすい状態にあるロック体と他方の部材とが係合し
てロック状態になる。ロック状態で背もたれを僅かに後
傾させると、他方の部材を介してロック体に対してばね
力が作用することが解除されるため、各ロック体は操作
具によってロック不能状態に戻すことができ、背もたれ
のロックを解除することができる。そして、操作具を操
作しない限り、ロック状態が解除されることはない。On the other hand, when the operating tool is operated with the backrest tilted backward to switch each lock body to the lockable state, the backrest is swung back and forth a little, so that the lock body in the most easily engaged state. And the other member are engaged with each other to be locked. When the backrest is tilted slightly backward in the locked state, the spring force acting on the lock body is released via the other member, so that each lock body can be returned to the unlocked state by the operation tool. , The backrest can be unlocked. The locked state is not released unless the operation tool is operated.
【0012】このように、本発明は、複数のロック体を
設けたことにより、背もたれを3段階以上にロックする
ことができるため、背もたれを使用者の好みに応じた姿
勢にロックすることができる。そして、一つのロック体
に多くの係合部を形成する必要はなく、一つ又は二つの
係合部を形成すれば足りるから、各ロック体の強度を損
なうこともないのである。As described above, according to the present invention, since the backrest can be locked in three or more stages by providing the plurality of lock bodies, the backrest can be locked in the posture according to the preference of the user. . And, it is not necessary to form a number of engaging portions on one of the lock body, one or because it is sufficient to form two engagement portions is not even impair the strength of the lock body.
【0013】請求項2のように、座体を取付けるための
第1支軸にロック体を係脱させる構成にすると、第1支
軸をロック装置の部材に兼用できるため、それだけ構造
が簡単になる利点がある。When the lock body is engaged with and disengaged from the first support shaft for mounting the seat body as in the second aspect, the first support shaft can also be used as a member of the lock device, so that the structure is simplified accordingly. There are advantages.
【0014】[0014]
【発明の実施形態】次に、本発明の実施形態を図面に基
づいて説明する。Embodiments of the present invention will now be described with reference to the drawings.
【0015】(1).第1実施形態(図1〜図5)
図1〜図5では第1実施形態を示している。このうち図
1は椅子の右側面図であり、この図1に示すように、椅
子は、脚支柱1の上端に取付けた座受け体2と、座受け
体2に取付けた座体3及び揺動部材4と、揺動部材4に
取付けた背もたれ5とを備えている。座体3はベース板
6を備えている。(1). First Embodiment (FIGS. 1 to 5) FIGS. 1 to 5 show the first embodiment. Of these, FIG. 1 is a right side view of the chair. As shown in FIG. 1, the chair includes a seat receiving body 2 attached to the upper ends of the leg columns 1, a seat body 3 attached to the seat receiving body 2, and a rocker. A moving member 4 and a backrest 5 attached to the swinging member 4 are provided. The seat body 3 includes a base plate 6.
【0016】図2(A)は座体3を省略した状態での平面
図、図3(A)は図2の III-III視断面図であり、これらの
図に示すように、座受け体2は上向きに開口した箱状に
形成されており、その左右側板2aの先端部に後傾方向に
延びるガイド穴7を設け、この左右ガイド穴7に挿通し
た第1支軸8を、座体3におけるベース板6の左右側板
6aを貫通させている。例えば図3(B)の部分図に明示する
ように、座受け体2のガイド穴7には合成樹脂製等のブ
ッシュ9を装着している。FIG. 2 (A) is a plan view in which the seat body 3 is omitted, and FIG. 3 (A) is a sectional view taken along line III-III of FIG. 2 is formed in the shape of a box that opens upward, and the left and right side plates 2a are provided with guide holes 7 extending in the rearward inclination direction, and the first support shaft 8 inserted through the left and right guide holes 7 is attached to the seat body. Left and right side plates of base plate 6 in 3
It penetrates 6a. For example, as clearly shown in the partial view of FIG. 3 (B), a bush 9 made of synthetic resin or the like is attached to the guide hole 7 of the seat receiving body 2.
【0017】図2に示すように、揺動部材4の前部4aは
座受け体2の左右両側面に沿って延びるように平面視二
股状に形成されており、これら左右前部4aと座受け体2
の後端寄り部位とに第2支軸10を貫通させ、更に、揺動
部材4と前記座体3のベース板6とを第3支軸11で回動
自在に連結している。なお、揺動部材4は左右に分離し
た形態でも良い。As shown in FIG. 2, the front portion 4a of the swinging member 4 is formed in a bifurcated shape in plan view so as to extend along the left and right side surfaces of the seat receiving body 2, and the front and rear portions 4a and 4a are seated. Receiver 2
The second support shaft 10 is passed through the portion near the rear end, and the swinging member 4 and the base plate 6 of the seat body 3 are rotatably connected by the third support shaft 11. The swinging member 4 may be separated into left and right.
【0018】座受け体2のうち第2支軸10よりもやや手
前の部位に、断面角形の第4支軸12を回転自在に挿通
し、この第4支軸12と前記第1支軸8とに取付けた前後
一対のばね受け13,14 の間に、ばね(圧縮コイルばね)
15を嵌め込んでいる。従って、背もたれ5の後傾動に連
動して座体3は後傾しつつ後退動する。なお、ばね15
は、人が着座した程度は変形せず、背もたれ5にもたれ
掛かると変形するような強さに設定している。A fourth support shaft 12 having a square cross section is rotatably inserted into a portion of the seat receiving body 2 slightly before the second support shaft 10, and the fourth support shaft 12 and the first support shaft 8 are rotatably mounted. A spring (compression coil spring) is placed between the pair of front and rear spring supports 13 and 14 attached to and.
15 is fitted. Therefore, the seat body 3 moves backward while tilting backward, interlocking with the backward tilting of the backrest 5. The spring 15
Is set so that it does not deform to the extent that a person sits down, but deforms when it leans against the backrest 5.
【0019】前ばね受け13は第1支軸8に対して単に嵌
まっているに過ぎないが、後ばね受け14は、その足部14
a(図2(A)参照)を第4支軸12に対して前後スライド自
在に嵌め入れており、第4支軸12のうち後ばね受け14の
左右足部14aの間の部位に、図3(A)に示すように側面視
多角形のカム16を相対回転不能に嵌め込んでいる。従っ
て、図示しないハンドル(或いはレバー)に手を当てて
第4支軸12を回転させると後ばね受け14が前後動し、こ
れによってばね15の初期弾性力が変化する。Although the front spring bearing 13 is merely fitted to the first support shaft 8, the rear spring bearing 14 has the foot portion 14 thereof.
a (see FIG. 2 (A)) is slidably fitted into the fourth support shaft 12 in the front-rear direction, and is attached to a portion of the fourth support shaft 12 between the left and right foot portions 14a of the rear spring receiver 14 as shown in FIG. As shown in FIG. 3 (A), a cam 16 having a polygonal shape in a side view is fitted so as not to rotate relative to one another. Therefore, when the handle (or lever) (not shown) is touched with the hand to rotate the fourth support shaft 12, the rear spring receiver 14 moves back and forth, whereby the initial elastic force of the spring 15 changes.
【0020】図2のうち (B)は第4支軸12の取付け状態
を示す平断面図、 (C)は (B)の C-C視図であり、これら
の図に示すように、第4支軸12に、外周を円形に形成し
たインナーブッシュ17を嵌め込み、このインナーブッシ
ュ17を、座受け体2の側板2aに嵌着したアウターブッシ
ュ18に回転自在に嵌め入れることにより、第4支軸12を
回転可能としている。なお、後ばね受け14は第2支軸10
に取付けても良いし、座受け体2の底面に固定的に設け
ても良い。In FIG. 2, (B) is a plan sectional view showing the mounting state of the fourth support shaft 12, and (C) is a CC view of (B). As shown in these drawings, The inner bush 17 having a circular outer periphery is fitted on the shaft 12, and the inner bush 17 is rotatably fitted on the outer bush 18 fitted on the side plate 2a of the seat receiving body 2 to form a fourth support shaft 12 Is rotatable. The rear spring receiver 14 is the second support shaft 10
It may be attached to the bottom surface of the seat receiving body 2 or may be fixedly provided on the bottom surface of the seat receiving body 2.
【0021】図2及び図4〜図5でロック装置20を示し
ている。図4の (A)(B)(C)はそれぞれ図2(A)のA,B,C 矢
視図、図5のうち (A)は要部の説明図、(B)(C)は動作状
態の説明図である。The locking device 20 is shown in FIGS. 2 and 4-5. (A) (B) (C) of FIG. 4 is a view of A, B, C of FIG. 2 (A) respectively, (A) of FIG. 5 is an explanatory view of the main part, (B) (C) is It is explanatory drawing of an operating state.
【0022】ロック装置20は、前後方向に延びる第1〜
第3の3本(2本又は4本以上でも良い)のロック体2
1,22,23を備えており、各ロック体21,22,23を左右に並
べて配置し、各ロック体21,22,23の後端部は前記第4支
軸12にブッシュ24を介して回転自在に嵌め込まれてい
る。第4支軸12には、各ロック体21,22,23の回動をスム
ースにするためカラー(スペーサ)25aが嵌まっている
(図2(A)参照)。また、第1支軸8にも前ばね受け23の
ずれを防止するためのカラー25bが嵌まっている。The locking device 20, first to extend in the longitudinal direction
Third lock body 3 (2 or 4 or more may be used)
1, 22, 23 are provided, and the lock bodies 21, 22, 23 are arranged side by side, and the rear ends of the lock bodies 21, 22, 23 are attached to the fourth support shaft 12 via a bush 24. It is rotatably fitted. A collar (spacer) 25a is fitted on the fourth support shaft 12 in order to smoothly rotate the lock bodies 21, 22, 23 (see FIG. 2 (A)). A collar 25b for preventing the front spring bearing 23 from slipping is also fitted to the first support shaft 8.
【0023】各ロック体21,22,23の前端部には、第1支
軸8に下方から嵌合し得る係合溝26を形成している。こ
の場合、図4及び図5(A)に示すように、ばね15に近い第
1ロック体21には、前進し切った状態と後退し切った状
態との二つの位置の第1支軸8に嵌合するように前後2
箇所に係合溝26を形成している。An engaging groove 26 which can be fitted to the first support shaft 8 from below is formed at the front end of each lock body 21, 22, 23. In this case, as shown in FIGS. 4 and 5A, the first lock body 21 near the spring 15 has the first support shaft 8 in two positions, that is, the fully advanced state and the fully retracted state. 2 to fit in
An engagement groove 26 is formed at the location.
【0024】他方、左右中間に位置した第2ロック体22
の係合溝26は、やや後退した状態での第1支軸8に嵌合
し得る位置に形成しており、また、ばね15から最も離れ
た第3ロック体23の係合溝26は、後退し切るよりもやや
手前に位置した第1支軸8に嵌まり位置に形成してい
る。On the other hand, the second lock body 22 located in the middle of the left and right
Is formed at a position where it can be fitted to the first support shaft 8 in a slightly retracted state, and the engagement groove 26 of the third lock body 23 farthest from the spring 15 is The first support shaft 8 is located at a position slightly ahead of the position where the first support shaft 8 is completely retracted.
【0025】第1ロック体21の係合溝26は切欠き状に形
成している(換言すると、第1支軸8に前後方向から当
たる突起を設けたと言い換えても良い)。各ロック体2
1,22,23において係合溝26を挟んだ前後両側の部位は側
面視山形に形成しているが、これは、第1支軸8への係
合溝26の嵌まり込みをガイドするためである。The engagement groove 26 of the first lock body 21 is formed in a notch shape (in other words, it may be said that the first support shaft 8 is provided with a projection that abuts in the front-rear direction). Each lock body 2
The front and back sides of the engagement groove 26 sandwiched between 1, 22 and 23 are formed in a mountain shape in side view. This is for guiding the engagement of the engagement groove 26 with the first support shaft 8. Is.
【0026】第4支軸12は請求項1に記載した一方の軸
に該当し、第1支軸8は請求項1に記載した他方の軸に
該当する。また、係合溝26は請求項1に記載した係合部
の一例である。The fourth support shaft 12 may correspond to one shaft <br/> according to claim 1, the first support shaft 8 corresponds to the other shaft according to claim 1. The engaging groove 26 is an example of the engaging portion described in claim 1.
【0027】座受け体2における左右側板2aの前端間に
は、操作具の一例として操作ロッド27を回転自在に取付
けている。操作ロッド27のうち各ロック体21,22,23と対
応した部位にはクランク部27aが折曲げ形成されてお
り、このクランク部27aと各ロック体21,22,23とを引張
ばね28(他の弾性体でも良い)を掛け渡している。An operating rod 27, which is an example of an operating tool, is rotatably mounted between the front ends of the left and right side plates 2a of the seat receiving body 2. A crank portion 27a is formed by bending at a portion of the operation rod 27 corresponding to each lock body 21, 22, 23. The crank portion 27a and each lock body 21, 22, 23 are connected to a tension spring 28 (others). It may be an elastic body).
【0028】以上の構成において、操作ロッド27を回転
操作することにより、各ロック体21,22,23を、その係合
溝26が第1支軸8に向けて上向き動するロック可能状態
と、係合溝26が第1支軸8から離反したロック不能状態
とに切り換わる。In the above construction, by rotating the operating rod 27, the lock bodies 21, 22, 23 are locked in a lockable state in which the engagement grooves 26 of the lock bodies 21, 22, 23 move upward toward the first support shaft 8. The engagement groove 26 is switched to the lockable state in which the engagement groove 26 is separated from the first support shaft 8.
【0029】背もたれ5が全く後傾していない状態で各
ロック体21,22,23をロック可能状態にすると、図5(B)に
示すように、第1ロック体21における前部の係合溝26が
第1支軸8に嵌合し、これによって背もたれ5は後傾動
不能にロックされる。背もたれ5を後傾させ切った状態
でロック可能状態に操作ロッド27を操作すると、図5(C)
に示すように、第1ロック体21における後部の係合溝26
が第1支軸8に嵌合し、背もたれ5は後傾し切った状態
にロックされる。When the lock bodies 21, 22, 23 are set in a lockable state with the backrest 5 not tilted backward at all, as shown in FIG. 5 (B), the front portion of the first lock body 21 is engaged. The groove 26 is fitted into the first support shaft 8 so that the backrest 5 is locked so that it cannot be tilted backward. When the operation rod 27 is operated in a lockable state with the backrest 5 tilted backward,
As shown in FIG.
Is fitted to the first support shaft 8, and the backrest 5 is locked in a state in which the backrest 5 is fully tilted backward.
【0030】更に、背もたれ5を途中まで後傾させた状
態で操作ロッド27をロック可能状態にし、その状態で背
もたれ5を前後方向に多少回動させると、第2ロック体
22と第3ロック体23とのうちいずれか一方のロック体の
係合溝26が第1支軸8に嵌合し、背もたれ5を途中まで
後傾させた状態でロックできる。このように、背もたれ
5を4段階にロックできる(ロック体の数を増やすこと
により、ロックできる段階を増やすことができる)。Further, when the operating rod 27 is made lockable in a state where the backrest 5 is tilted backward to the middle, and the backrest 5 is slightly rotated in the front-back direction in that state, the second lock body is formed.
The engagement groove 26 of either one of the lock body 22 and the third lock body 23 is fitted to the first support shaft 8 so that the backrest 5 can be locked in a state of being tilted backward. Thus, the backrest 5 can be locked in four stages (the number of lock bodies can be increased to increase the number of stages in which it can be locked).
【0031】ロック状態では、各ロック体21,22,23は引
張ばね28で上向きに付勢されているのでロックが不測に
解除することはない。また、背もたれ5を後傾させた状
態でロックしている場合には、背もたれ5に体重をかけ
て当該背もたれ5を僅かに後傾させると、ばね15の押圧
力が第1支軸8を介してロック体21,22,23に作用するこ
とが解除され、ロック体21,22,23を容易に回動させるこ
とができる。したがって、ロックが不測に解除されるこ
とを防止して安全性を確保でき、しかも、ロック解除の
容易性を損なうこともない。In the locked state, the lock bodies 21, 22 and 23 are urged upward by the tension springs 28, so that the lock is not accidentally released. Further, when the backrest 5 is locked in a state of being tilted backward, when the backrest 5 is weighted and the backrest 5 is tilted slightly backward, the pressing force of the spring 15 passes through the first support shaft 8. The lock bodies 21, 22, 23 are released from acting on the lock bodies 21, 22, 23, and the lock bodies 21, 22, 23 can be easily rotated. Therefore, it is possible to prevent the lock from being released accidentally and ensure the safety, and the ease of releasing the lock is not impaired.
【0032】そして、第2及び第3のロック体22,23 に
は係合溝26を1ヵ所形成するだけでよく、また、第1ロ
ック体21の前後係合溝26間にも十分な寸法を取れるた
め、各ロック体21,22,23の強度を損なうこともない。な
お、第1支軸8のストロークが実施形態よりも小さい場
合には、第1ロック体21にも係合溝26を1ヵ所だけ形成
すれば良い。The second and third lock bodies 22 and 23 need only have one engaging groove 26 formed therein, and the sufficient space is provided between the front and rear engaging grooves 26 of the first lock body 21. Therefore, the strength of each lock body 21, 22, 23 is not impaired. If the stroke of the first support shaft 8 is smaller than that of the embodiment, only one engagement groove 26 may be formed in the first lock body 21.
【0033】(2).第2実施形態(図6〜図8)
図6〜図8では第2実施形態を示しており、図6は部分
側断面図、図7は図6のVII-VII 平面図、図8は作用を
示す図である。この実施形態もロック体30,31,32を第1
支軸8に嵌合させることによってロックするようにした
ものであり、第1支軸8の上方に配置された3個のロッ
ク体30,31,32を備えている。なお、図では省略している
が、第1実施形態と同様のばね15やカラー24を備えてい
る。(2). Second Embodiment (FIGS. 6 to 8) FIGS. 6 to 8 show a second embodiment, FIG. 6 is a partial side sectional view, and FIG. 7 is VII-VII of FIG. FIG. 8 is a plan view and FIG. 8 is a view showing the operation. Also in this embodiment, the lock bodies 30, 31, 32 are firstly arranged.
It is adapted to be locked by being fitted to the support shaft 8, and is provided with three lock bodies 30, 31, 32 arranged above the first support shaft 8. Although not shown in the drawing, the spring 15 and the collar 24 similar to those of the first embodiment are provided.
【0034】各ロック体30,31,32は、第1支軸8よりも
手前の位置で座受け体2に水平状に取付けた支軸33に回
動自在に取付けられており、各ロック体30,31,32には下
向きに開口した係合溝34を形成している。この場合、第
1ロック体30には前後2ヵ所に係合溝34を形成し、第2
及び第3ロック体30,31,32には1ヵ所だけに係合溝34を
形成している。The lock bodies 30, 31, 32 are rotatably attached to a support shaft 33 horizontally attached to the seat receiving body 2 at a position closer to the first support shaft 8 than the first support shaft 8. Engagement grooves 34 opening downward are formed in 30, 31, 32. In this case, the first lock body 30 is formed with engaging grooves 34 at the front and rear two positions, and
The engaging groove 34 is formed in only one place in the third lock body 30, 31, 32.
【0035】符号35はカラーである。各係合溝34は、第
1支軸8から容易に抜けないように支軸33の方向に少し
えぐった状態に形成している。Reference numeral 35 is a color. Each engagement groove 34 is formed in a state of being slightly scooped in the direction of the support shaft 33 so as not to easily come off from the first support shaft 8.
【0036】支軸33には、各ロック体30,31,32に対応し
た3本のねじりばね36を嵌め入れており、各ばね36の一
端36aを座受け体2の底面に当て、他端36bをロック体
30,31,32の下面に当てている。したがって、各ロック体
30,31,32は上向き回動する方向(ロック解除方向)に付
勢されている。また、座受け体2には、各ロック体30,3
1,32の上向き回動姿勢を規制するためのストッパーピン
37を取付けている。Three torsion springs 36 corresponding to the lock bodies 30, 31, 32 are fitted on the support shaft 33, and one end 36a of each spring 36 is brought into contact with the bottom surface of the seat receiving body 2 and the other end thereof. 36b lock body
It is applied to the bottom surface of 30, 31, 32. Therefore, each lock body
30, 31, 32 are urged in a direction of rotating upward (lock releasing direction). In addition, the seat receiving body 2 is provided with each lock body 30,3.
1,32 Stopper pin to regulate the upward rotation posture
37 is installed.
【0037】座受け体2のうち支軸33の近傍には左右方
向に延びる操作ロッド38を回転自在に取付けており、こ
の操作ロッド38に、各ねじりばね36の他端36bに上方か
ら当たるクランク部38aを形成している。従って、操作
ロッド38を図6の矢印Aのように回転すると、各ロック
体30,31,32は自重によって下向きに回動して、係合溝34
が第1支軸8に嵌合し得るロック可能状態になる。An operating rod 38 extending in the left-right direction is rotatably attached to the seat receiving body 2 in the vicinity of the support shaft 33, and a crank that abuts the other end 36b of each torsion spring 36 from above. The portion 38a is formed. Therefore, when the operating rod 38 is rotated as shown by the arrow A in FIG. 6, the lock bodies 30, 31, 32 rotate downward due to their own weight, and the engaging groove 34
Is in a lockable state in which it can be fitted to the first support shaft 8.
【0038】そして、ロック可能状態でいずれかの係合
溝34が第1支軸8に嵌合することにより、背もたれ5を
多段階的にロックできる。Then, by engaging one of the engaging grooves 34 with the first support shaft 8 in the lockable state, the backrest 5 can be locked in multiple stages.
【0039】(3).その他
図9では、本発明を適用し得る別形態の椅子を示してお
り、この例では、第2支軸10がスライドすることによっ
て背もたれ5と座体3とが一体に後傾する。この場合
は、前記第1実施形態や第2実施形態のようにロック体
を座受け体に取付け、各ロック体に形成した係合溝を第
2支軸に嵌脱させることによってロック又はロック解除
させれば良い。 (3). Others FIG. 9 shows a chair of another form to which the present invention can be applied. In this example, the backrest 5 and the seat body 3 are integrated by sliding the second support shaft 10. Lean back on. In this case, as in the first and second embodiments, the lock body is attached to the seat receiving body, and the engaging groove formed in each lock body is inserted into and removed from the second support shaft to lock or unlock. You can do it.
【0040】上記の各実施形態ではロック体を座受け体
に取付けているが、必ずしも揺動部材を直接にロックす
る必要はないのであり、揺動部材を間接的にロックして
も良い。従って、ロック装置は、背もたれ(揺動部材)
の後傾動に連動して相対動する二つの軸を相対動不能に
保持できる構造であれば足り、ロック体を設ける部材に
は限定はない。In each of the above embodiments, the lock body is attached to the seat receiving body, but it is not always necessary to directly lock the rocking member, and the rocking member may be indirectly locked. Therefore, the locking device includes a backrest (a swinging member).
There is no limitation on the member provided with the lock body as long as the structure is capable of holding the two shafts that move relative to each other in association with the rearward tilting so that they cannot move relative to each other.
【0041】また、ロック体の形状や係合部の形態も上
述の例に限るものではなく、必要に応じて自由に設計変
更することができる。Further, the shape of the lock body and the form of the engaging portion are not limited to the above examples, and the design can be freely changed as necessary.
【図1】第1実施形態に係る椅子の右側面図である。FIG. 1 is a right side view of a chair according to a first embodiment.
【図2】 (A)は座体を省略した状態での平面図、 (B)及
び (C)は第4支軸の取付け状態を示す図である。FIG. 2A is a plan view with a seat body omitted, and FIGS. 2B and 2C are views showing a mounted state of a fourth support shaft.
【図3】 (A)は図2(A)の III-III視断面図、 (B)は座体
の取付け状態を示す部分図である。3A is a sectional view taken along line III-III of FIG. 2A, and FIG. 3B is a partial view showing a mounting state of a seat body.
【図4】図2(A)のA-A,B-B,C-C 視断面図である。4 is a sectional view taken along line AA, BB, C-C of FIG. 2 (A).
【図5】 (A)はロック装置の説明図、(B)(C)はロック状
態を示す図である。5A is an explanatory diagram of a lock device, and FIGS. 5B and 5C are diagrams showing a locked state.
【図6】第2実施形態の部分側断面図である。FIG. 6 is a partial side sectional view of the second embodiment.
【図7】図6のVII-VII 視平面図である。FIG. 7 is a plan view taken along line VII-VII of FIG.
【図8】 (A)は各ロック体と第1支軸との関係を示す
図、 (B)はロック状態の一例を示す図である。FIG. 8A is a diagram showing a relationship between each lock body and the first support shaft, and FIG. 8B is a diagram showing an example of a locked state.
【図9】本発明を適用し得る別形態の椅子の概略側面図
である。 FIG. 9 is a schematic side view of another type of chair to which the present invention can be applied.
Is.
1 脚の支柱 2 座受け体 3 座体 4 揺動部材 5 背もたれ 8 第1支軸(他方の軸) 10 第2支軸 11 第3支軸 12 第4支軸(一方の軸) 15 ばね 20 ロック装置 21,22,23,30,31,32,42ロック体 26 係合溝 27 操作ロッド 40 係合穴First leg of the tower 2 seat receiving body 3 the seat support 4 swing member 5 backrest 8 first support shaft (other shaft) 10 second support shaft 11 third support shaft 12 fourth shaft (one shaft) 15 spring 20 Lock device 21, 22, 23, 30, 31, 32, 42 Lock body 26 Engagement groove 27 Operation rod 40 Engagement hole
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) A47C 1/00 - 7/48 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) A47C 1/00-7/48
Claims (2)
体に取付けた座体と、前記座受け体又は座体に後傾動自
在に取付けた揺動部材と、この揺動部材に取付けた背も
たれと、前記揺動部材の後傾動を弾性的に支持するばね
手段とを備えた椅子であって、 前記背もたれの後傾動に連動して互いの間隔が変化する
ように相対動する二つの軸を、それぞれ椅子の正面視で
左右方向に延びるように配置しており、 これら両軸のうち一方の軸に 、ハンドル等の操作具によ
ってロック可能状態とロック不能状態とに一斉に切り換
えできる複数個の回動式ロック体を取付け、各ロック体
に、ロック可能状態で他方の軸に係合することによって
両軸を相対動不能に保持する係合部を設け、これら各ロ
ック体の係合部を、両軸の相対動方向に沿って順次ずら
している、 椅子。 1. A seat receiving member provided on the upper ends of legs, a seat member attached to the seat receiving member, a swinging member attached to the seat receiving member or the seat body so as to be tiltable rearward, and the swinging member. A chair provided with a backrest attached to the backrest and spring means for elastically supporting the rearward tilting of the swinging member , wherein the distance between the chairs changes in conjunction with the rearward tilting of the backrest.
The two axes that move relative to each other as seen from the front of the chair
It is arranged so as to extend in the left-right direction, and one of these two shafts is equipped with a plurality of rotary lock bodies that can be switched to a lockable state and a lockable state at the same time by an operating tool such as a handle. , By engaging each lock body with the other shaft in a lockable state
An engaging portion for holding the two axes relative movement impossible provided, the engagement portion of the lock body, that have sequentially shifted along the relative movement direction of both axes, chair child.
傾方向にスライド自在な第1支軸を取付け、この第1支
軸に座体を回動自在に取付けると共に、座受け体のうち
前記第1支軸よりも後方の部位に、前記揺動部材の前端
を第2支軸によって後傾動自在に取付け、揺動部材の前
後中途部と座体とを第3支軸によって回動自在に連結
し、更に、前記座受け体に、第1支軸の後退動を支持す
るばねを設け、 かつ、前記座受け体に、前記第1支軸に係合して当該第
1支軸をスライド不能に保持する係合溝が形成された複
数のロック体を、ハンドルの操作によって各係合溝が第
1支軸に係合し得る状態と係合不能な状態とに回動自在
に切り替わるように設け、これら各ロック体の係合溝を
前後方向にずらしている、 請求項1に記載した椅子 。Before side portion of wherein prior Symbol seat receiving body, mounting the slidable first support shaft in the rearward tilting direction in a side view, with attached rotatably to the seat support on the first support shaft, the seat A front end of the swinging member is attached to a portion of the receiving body rearward of the first support shaft such that the front end of the swinging member can be tilted rearward by a second support shaft, and a front and rear midway portion of the swinging member and a seat body are provided as a third support shaft. And a spring for supporting the backward movement of the first support shaft, the seat support body being provided with a spring for supporting the backward movement of the first support shaft. The plurality of lock bodies having the engagement grooves for holding the first support shaft in a non-slidable state are turned into a state in which the engagement grooves can be engaged with the first support shaft and a state in which the engagement grooves cannot be engaged by operating the handle. provided to switch freely moving, that have shifted engagement groove of the lock member in the longitudinal direction, the chair according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18380498A JP3451581B2 (en) | 1998-06-30 | 1998-06-30 | Chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18380498A JP3451581B2 (en) | 1998-06-30 | 1998-06-30 | Chair |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000014485A JP2000014485A (en) | 2000-01-18 |
JP3451581B2 true JP3451581B2 (en) | 2003-09-29 |
Family
ID=16142195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18380498A Expired - Fee Related JP3451581B2 (en) | 1998-06-30 | 1998-06-30 | Chair |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3451581B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3108867B1 (en) * | 2015-06-23 | 2018-12-05 | Cefla Societa' Cooperativa | Dental patient chair |
-
1998
- 1998-06-30 JP JP18380498A patent/JP3451581B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2000014485A (en) | 2000-01-18 |
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