JPH08317831A - Shaft device with shaft having direction restituting function and elevatable function - Google Patents
Shaft device with shaft having direction restituting function and elevatable functionInfo
- Publication number
- JPH08317831A JPH08317831A JP17183896A JP17183896A JPH08317831A JP H08317831 A JPH08317831 A JP H08317831A JP 17183896 A JP17183896 A JP 17183896A JP 17183896 A JP17183896 A JP 17183896A JP H08317831 A JPH08317831 A JP H08317831A
- Authority
- JP
- Japan
- Prior art keywords
- bush
- shaft
- pipe
- cam
- movable
- 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.)
- Granted
Links
Landscapes
- Chairs Characterized By Structure (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、外力が除かれたと
きに自動的に正面向き(前向き)に戻る方向復元機能お
よびシリンダ装置により昇降できる昇降機能を備えた軸
をもつ軸装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft device having a shaft having a direction restoring function for automatically returning to the front (forward direction) when an external force is removed and an elevating function capable of ascending and descending by a cylinder device.
【0002】[0002]
【従来の技術】従前、実開昭60−145844号公報
によって台枠に立設した円筒状の支脚パイプ内に上面を
傾斜状カム面とした上向きカムを固定し、一方、座板の
下面に垂設した軸杆に前記上向きカムのカム面に摺接す
るカム面を設けた下向きカムを上下摺動自在に装着する
と共に該下向きカムを上向きカム上面に重合設置し、該
下向きカムを支脚パイプ内に設けたばねにより押圧して
上向きカムに圧接させるように構成したことを特徴とす
る椅子が開示されている。この椅子は、座板から着席者
がいなくなると当該座板が自動的に正面向き(前向き)
に戻る機能すなわち方向復元機能を備えているが、着席
者が座席の高さを自分に合うように高くしたり低くした
りする昇降機能を備えていないものである。これは座板
の下面に垂設された軸杆がカムによって方向復元機能を
賦与されているのみの構成であるためによるものであ
る。2. Description of the Related Art Conventionally, according to Japanese Utility Model Laid-Open No. 60-145844, an upward cam having an inclined cam surface on its upper surface is fixed in a cylindrical support pipe standing upright on an underframe, while on the lower surface of a seat plate. A downward cam having a cam surface slidably contacting the cam surface of the upward cam is vertically slidably mounted on a vertically extending shaft rod, and the downward cam is superposed on the upper surface of the upward cam, and the downward cam is installed in a supporting pipe. Disclosed is a chair characterized in that it is configured to be pressed by a spring provided in the above so as to be pressed against an upward cam. In this chair, when there are no seated occupants in the seat, the seat automatically faces the front (forward).
It has a function to return to the direction, that is, a direction restoring function, but does not have an elevating function for the seated person to raise or lower the seat height to suit him. This is because the shaft rod vertically provided on the lower surface of the seat plate is only provided with the direction restoring function by the cam.
【0003】また、上記従来の椅子は、上・下1対の傾
斜カムによる方向復元装置を構成要素としているので、
軸杆の回転により可動側下向きカムが回転したときに
は、固定側上向きカムに対する可動側下向きカムの接触
個所が軸杆から一方に偏倚して位置し、当該接触個所に
荷重が集中してかかることになるものであり、このよう
に一方にのみ偏倚した個所で荷重を受けた状態では軸杆
と同軸杆が接触する面との間に生ずる接触圧(制動力)
が増大し、当該軸杆の回転のスムーズ性が悪化し易く不
快音(マサツによる金属音)を出し易いものであった。Further, since the above-mentioned conventional chair has as a constituent element a direction restoring device by a pair of upper and lower inclined cams,
When the movable-side downward cam rotates due to the rotation of the shaft rod, the contact point of the movable-side downward cam with respect to the fixed-side upward cam is located offset from the shaft rod to one side, and the load is concentrated on the contact point. The contact pressure (braking force) generated between the shaft rod and the surface where the coaxial rod contacts in the state where the load is applied at the position biased to only one side in this way.
And the smoothness of the rotation of the shaft rod is easily deteriorated, and an unpleasant sound (a metallic sound due to a masashi) is easily generated.
【0004】[0004]
【発明が解決しようとする課題】本発明は、上記の方向
復元機能および昇降機能の両方を備えている新規の軸装
置を提供することを第1の目的し、そして上記回転のス
ムーズ性の悪化および不快音の発生を解消する工夫を施
した新規の軸装置を提供することを第2の目的とするも
のである。SUMMARY OF THE INVENTION The first object of the present invention is to provide a novel shaft device having both the above-mentioned direction restoring function and lifting function, and the smoothness of rotation is deteriorated. It is a second object of the present invention to provide a novel shaft device that is devised to eliminate the generation of unpleasant noise.
【0005】[0005]
【課題を解決するための手段】上記第1の目的を達成す
るために、パイプと、パイプ内に回転可能および上下作
動可能として設けた、シリンダ装置の伸縮作動により上
昇・下降できる軸と、パイプ内における軸のまわりに回
転不能の状態として嵌め設けた固定側ブッシュと、パイ
プ内における軸のまわりの固定側ブッシュより上側の個
所にパイプに対しては回転可能および上下動可能の状態
また軸に対しては回転不能および上下動可能の状態とし
て嵌め設けた可動側ブッシュと、固定側ブッシュにおけ
る上端縁面および可動側ブッシュにおける下端縁面にカ
ム面が相互に接して摺る状態で設けた上向き傾斜カムお
よび下向き傾斜カムと、パイプ内に可動側ブッシュを押
下する状態で設けたバネと、を備えたものであり、そし
て、第2の目的を達成するために、パイプと、パイプ内
に回転可能および上下作動可能として設けた、シリンダ
装置の伸縮作動により上昇・下降できる軸と、パイプ内
における軸のまわりに回転不能の状態として嵌め設けた
固定側ブッシュと、パイプ内における軸のまわりの固定
側ブッシュより上側の個所にパイプに対しては回転可能
および上下動可能の状態また軸に対しては回転不能およ
び上下動可能の状態として嵌め設けた可動側ブッシュ
と、固定側ブッシュにおける上端縁面の外周側半分個所
および可動側ブッシュにおける下端縁面の外周側半分個
所にカム面が相互に接して摺る状態で設けた外側上向き
傾斜カムおよび外側下向き傾斜カムと、固定側ブッシュ
における上端縁面の内周側半分個所および可動側ブッシ
ュにおける下端縁面の内周側半分個所にカム面が相互に
接して摺る状態として設けた上記外側上・下向きカムと
反対向き同じ角度で傾斜する内側上向きカムおよび内側
下向きカムと、パイプ内に可動側ブッシュを押下する状
態で設けたバネと、を備えたものである。In order to achieve the above first object, a pipe, a shaft which is rotatably and vertically movable in the pipe, and which can be moved up and down by a telescopic operation of a cylinder device; The fixed side bush fitted in the inside of the pipe as a non-rotatable state, and the position above the fixed side bush around the shaft in the pipe that is rotatable and movable up and down with respect to the pipe On the other hand, the movable bush, which is fitted so that it cannot rotate and can move up and down, and the upward inclination that the cam surface slides in contact with the upper edge surface of the fixed bush and the lower edge surface of the movable bush. A cam and a downward tilting cam, and a spring provided in the pipe in a state where the movable side bush is pushed down, and a second object. To this end, a pipe, a shaft that is rotatably and vertically operable in the pipe, and that can be moved up and down by the expansion and contraction operation of the cylinder device, and a fixing that is non-rotatably fitted around the shaft in the pipe The side bush and the portion around the shaft in the pipe above the fixed side bush were fitted so as to be rotatable and vertically movable with respect to the pipe and non-rotatable and vertically movable with respect to the shaft. Outer upward tilting cam and outer downward facing, provided with the cam surfaces in contact with the movable bush and the outer peripheral half of the upper edge of the fixed bush and the outer peripheral half of the lower edge of the movable bush. Inclined cam and half of the fixed bush on the inner edge of the upper edge and half of the movable bush on the inner edge of the lower edge An inner upward cam and an inner downward cam that are inclined in the same angle as the above-mentioned outer upward / downward cams provided so that the cam surfaces are in contact with each other and slide, and a spring provided in a state in which the movable bush is pressed in the pipe. , Are provided.
【0006】[0006]
【実施例】図に示す実施例は、床面1にネジ2により立
設する脚柱パイプ3を構成し、この脚柱パイプ3の上端
部内にC型止リング4を以てスラストベアリング5を、
また同脚柱パイプ3の下端部内に後述するガスシリンダ
装置9の受座6をそれぞれ固定すると共に同脚柱パイプ
3内に自己復帰型押ピン7が開放の状態とされたときに
おいて上端部8が内蔵バネ(図示せず)により上方に上
昇し同上端部8に押し下げ外力が加えられたときに当該
外力により下降するガスシリンダ装置9を挿入し且つこ
のシリンダ装置9の上端部8を上記スラストベアリング
5の内径孔10を介して上方に貫出した状態として同シ
リンダ装置9の下端11を上記受座6に上下動不能およ
び回転可能に固定し、またこのシリンダ装置9の外に上
下作動パイプ軸12を同シリンダ装置9の外周に沿って
上下方向に摺動自在に被着すると共に当該上下作動パイ
プ軸12の上端個所13をシリンダ装置9の上端部8に
スプリングピン14を以て固定一体化し、更に上下作動
パイプ軸12の上端個所13の上端を上方に延長して当
該雄テーパー状延長部15に後述する座席体16を取付
けるようにする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, a pedestal pipe 3 which is erected on a floor surface 1 with screws 2 is constructed, and a thrust bearing 5 is provided in an upper end portion of the pedestal pipe 3 with a C-shaped stop ring 4.
Also, the seats 6 of the gas cylinder device 9 to be described later are respectively fixed in the lower ends of the pedestal pipes 3, and when the self-resetting push pins 7 are opened in the pedestal pipes 3, the upper ends 8 thereof are opened. Is inserted upward by a built-in spring (not shown) and pushed down to the upper end 8 of the same, and is lowered by the external force when the external force is applied to the gas cylinder device 9 and the upper end 8 of the cylinder device 9 is inserted into the thrust. The lower end 11 of the cylinder device 9 is fixed to the seat 6 so as not to be vertically movable and rotatably in a state of protruding upward through the inner diameter hole 10 of the bearing 5, and the vertical operation pipe is provided outside the cylinder device 9. The shaft 12 is slidably attached in the vertical direction along the outer circumference of the cylinder device 9, and the upper end portion 13 of the vertical operation pipe shaft 12 is attached to the upper end portion 8 of the cylinder device 9 by the spring pin 1. Fixed integrally with a, so that further mounting the seat body 16 to be described later to the male tapered extension 15 to the upper end extends above the upper end plane 13 of the vertical operating pipe shaft 12.
【0007】また、上記脚柱パイプ3内における上下作
動パイプ軸12のまわりに内径孔18の径が同上下作動
パイプ軸12の径より大きい固定側ブッシュ19を嵌め
て、当該固定側ブッシュ19を上記受座6に短管状補助
部材20を介して回転不能および上下移動不能に固定す
ると共に上下作動パイプ軸12のまわりの固定側ブッシ
ュ19より上側の個所に可動側ブッシュ21を脚柱パイ
プ3においては回転可能および上下動可能として嵌合
し、この可動側ブッシュ21の内周面にスプライン歯2
2をまた上記上下作動パイプ軸12の外周面にスプライ
ン溝23をそれぞれ設けてこれ等スプライン歯22、ス
プライン溝23を相互に嵌合し、更に固定側ブッシュ1
9の上端縁面に低・高所24、25および傾斜面26、
27から成る内側上向きカム28と低・高所29、30
および傾斜面31、32から成る外側上向きカム33と
を設け、内側上向きカム28の低所24を外側上向きカ
ム33の低所29と、内側上向きカム28の高所25を
外側上向きカム33の高所30とそれぞれ同じ高さとし
且つ内側上向きカム28の傾斜面26、27を外側上向
きカム33の傾斜面31、32と反対向きとすると共に
可動側ブッシュ21の下端縁面に低・高所34、35お
よび傾斜面36、37から成る内側下向きカム38と低
・高所39、40および傾斜面41、42から成る外側
下向きカム43とを設け、内側下向きカム38の低所3
4と外側下向きカム43の低所39と、内側下向きカム
38の高所35を外側下向きカム43の高所40とそれ
ぞれ同じ高さとし且つ内側下向きカム38の傾斜面3
6、37を外側下向きカム43の傾斜面41、42と反
対向きとし、更に可動側ブッシュ21の上面と上記スラ
ストベアリング5との間に同可動側ブッシュ21を押下
するコイルバネ45を挟装して脚体46を構成する。A fixed bush 19 having a diameter of the inner diameter hole 18 larger than that of the vertical working pipe shaft 12 is fitted around the vertical working pipe shaft 12 in the pedestal pipe 3, and the fixed bush 19 is fitted. In the pedestal pipe 3, a movable side bush 21 is fixed to the seat 6 via a short tubular auxiliary member 20 so as not to be rotatable and vertically movable and above the fixed side bush 19 around the vertical operation pipe shaft 12 above the fixed side bush 19. Are rotatably and vertically movable, and the spline teeth 2 are attached to the inner peripheral surface of the movable bush 21.
2 are also provided with spline grooves 23 on the outer peripheral surface of the upper and lower operation pipe shafts 12, and these spline teeth 22 and spline grooves 23 are fitted to each other.
9, the low and high places 24 and 25 and the inclined surface 26,
Upward cam 28 consisting of 27 and low and high places 29, 30
And an outer upward cam 33 composed of inclined surfaces 31 and 32, the lower portion 24 of the inner upward cam 28 is set to the lower portion 29 of the outer upward cam 33, and the upper portion 25 of the inner upward cam 28 is set to the upper portion of the outer upward cam 33. At the same height as the location 30, and the inclined surfaces 26, 27 of the inner upward cam 28 are opposite to the inclined surfaces 31, 32 of the outer upward cam 33, and the low / high places 34 are formed on the lower end edge surface of the movable bush 21. 35 is provided with an inner downward cam 38 composed of 35 and inclined surfaces 36 and 37, and an outer downward cam 43 composed of low / high places 39 and 40 and inclined surfaces 41 and 42.
4 and the lower part 39 of the outer downward cam 43 and the higher part 35 of the inner downward cam 38 are at the same height as the higher part 40 of the outer downward cam 43, and the inclined surface 3 of the inner downward cam 38 is
6 and 37 are opposite to the inclined surfaces 41 and 42 of the outer downward cam 43, and a coil spring 45 for pressing the movable bush 21 is interposed between the upper surface of the movable bush 21 and the thrust bearing 5. The leg 46 is configured.
【0008】尚、上記内側上向きカム28と下向きカム
38および外側上向きカム33と外側下向きカム43
は、内側下向きカム38の低所34が内側上向きカム2
8の高所25に接しているときに内側下向きカム38の
高所35が内側上向きカム28の低所24に、外側下向
きカム43の低所39が外側上向きカム32の高所30
にまた外側下向きカム43の高所40が外側上向きカム
33の低所29にそれぞれ接し、内側下向きカム38の
高所35が内側上向きカム28の傾斜面26、27に接
しているときに外側下向きカム43の高所40が外側上
向きカム33の傾斜面31、32に、内側上向きカム2
8の高所25が内側下向きカム38の傾斜面36、37
にまた外側上向きカム33の高所30が外側下向きカム
43の傾斜面41、42にそれぞれ接するようにしてあ
る。The inside upward cam 28, the downward cam 38, the outside upward cam 33, and the outside downward cam 43 are provided.
The lower part 34 of the inner downward cam 38 is the inner upward cam 2
The height 35 of the inner downward cam 38 is in the low portion 24 of the inner upward cam 28, and the height 39 of the outer downward cam 43 is in the height 30 of the outer upward cam 32 when in contact with the height 25 of 8.
Further, when the high point 40 of the outer downward cam 43 is in contact with the low point 29 of the outer upward cam 33, and the high point 35 of the inner downward cam 38 is in contact with the inclined surfaces 26, 27 of the inner upward cam 28, the downward downward movement is performed. The height 40 of the cam 43 is fixed to the inclined surfaces 31 and 32 of the outer upward cam 33 by the inner upward cam 2.
The height 25 of 8 is the inclined surface 36, 37 of the inner downward cam 38.
Further, the height 30 of the outer upward cam 33 is in contact with the inclined surfaces 41 and 42 of the outer downward cam 43, respectively.
【0009】上記脚体46とは別個に横から見てL形状
を呈するフレーム47の水平部48上面に座盤49を同
じく垂直部50の前面に背凭盤51を固定して座席体1
6を構成し、フレーム47の水平部48の下面にサドル
部材52を固定し、当該サドル部材52の下面に前後向
きに長い内方向きに開放する左右1対のコ字状案内溝部
53、54を設け、またサドル部材52の下面にベッド
部材55を配し且つ当該ベッド部材55の左右両側縁に
外向き突縁56、57を設け、これ等左右各外向き突縁
56、57に上記コ字状案内溝部53、54内を滑動自
在に嵌着する構成とされた合成樹脂製滑り部材58、5
9を着脱不能に被着し、これ等滑り部材58、59の被
着部分を上記コ字状案内溝部53、54に嵌着すること
によってベッド部材55の上にサドル部材52および座
席体16を前後移動自在に支承すると共にベッド部材5
5の下面の略中央個所にボス60を固着し、このボス6
0の雌テーパー孔61に上記雄テーパー状延長部15を
係合凹・凸部62、63の係止により回転不能とし且つ
ビス(図示せず)等の締付により抜去不能とし、またサ
ドル部材52の後端とベッド部材55の前端に前後2対
のバネ掛け孔65、66を設けてこれ等前後のバネ掛け
孔65、66にサドル部材52を前方に戻す2本のリタ
ーンバネ67、68の前後両端を掛止すると共にサドル
部材52の後端壁69の内面にくの字形状板バネ70を
配してその中間個所を同壁69にリベット71により止
着し、この板バネ70の両端部72、73がベッド部材
55の後端の左右両側に当接して衝突音を消音するよう
にする。A seat body 49 is fixed to the upper surface of a horizontal portion 48 of a frame 47 which is L-shaped when viewed from the side independently of the leg body 46, and a backrest board 51 is fixed to the front surface of a vertical portion 50 of the seat body 1.
6, a saddle member 52 is fixed to the lower surface of the horizontal portion 48 of the frame 47, and a pair of left and right U-shaped guide groove portions 53, 54 are formed on the lower surface of the saddle member 52 and open inward in the longitudinal direction. The bed member 55 is disposed on the lower surface of the saddle member 52, and the outward protruding edges 56 and 57 are provided on both left and right edges of the bed member 55. Synthetic resin sliding members 58, 5 configured to be slidably fitted in the V-shaped guide groove portions 53, 54.
9 is non-detachably attached, and the attached portions of the sliding members 58, 59 are fitted in the U-shaped guide groove portions 53, 54 to fix the saddle member 52 and the seat body 16 on the bed member 55. The bed member 5 is supported so as to be movable back and forth.
A boss 60 is fixed to the lower surface of the boss 6 at a substantially central position.
The male taper-shaped extension portion 15 is locked in the female taper hole 61 of No. 0 by the engagement concave / convex portions 62, 63 so as to be unrotatable and cannot be removed by tightening a screw (not shown) or the like. Two pairs of front and rear spring hooking holes 65 and 66 are provided at the rear end of 52 and the front end of the bed member 55, and two return springs 67 and 68 that return the saddle member 52 to the front and rear spring hooking holes 65 and 66. The front and rear ends of the saddle member 52 are hooked, and a dogleg shaped leaf spring 70 is arranged on the inner surface of the rear end wall 69 of the saddle member 52, and an intermediate portion thereof is fixed to the wall 69 by a rivet 71. Both ends 72 and 73 are brought into contact with the left and right sides of the rear end of the bed member 55 to muffle the collision sound.
【0010】更にベッド部材55の前端寄り個所内に横
軸74を左右向きとして且つ回転自在として渡し設け、
この横軸74に梃状操作レバー75の中間点を当該操作
レバー75の内端76が上記押ピン7の上端にスライド
ピン78を介して載った状態および同レバー75の外端
77が上記座盤49の前左個所の下方に位置する状態と
して固定したものである。Further, a horizontal shaft 74 is provided horizontally and rotatably in a portion of the bed member 55 near the front end,
The intermediate point of the lever-shaped operation lever 75 is placed on the horizontal shaft 74 in a state where the inner end 76 of the operation lever 75 is placed on the upper end of the push pin 7 via the slide pin 78 and the outer end 77 of the lever 75 is seated. It is fixed as being positioned below the front left portion of the board 49.
【0011】上記実施例の座席体16に使用者が正面向
きに着席した状態において同使用者が離席しようとして
着席のまま体をまわして横向きとなった場合には、座席
体16、上下作動パイプ軸12、シリンダ装置9および
可動側ブッシュ21が上記体のまわし角度と同じ角度
(約90度)までまわり、可動側ブッシュ21における
内側下向きカム38および外側下向きカム43と固定側
ブッシュ19における内側上向きカム28および外側上
向きカム33とが上記角度だけズレ、このズレによって
可動側ブッシュ21が上方に移動してコイルバネ45を
縮める。使用者が上記横向き後に立ち上って離席した場
合には上記において縮んだコイルバネ45の伸び力によ
って可動側ブッシュ21が下方に移動して当該可動側ブ
ッシュ21における内側下向きカム38および外側下向
きカム43と固定側ブッシュ19における内側上向きカ
ム28および外側上向きカム33とのズレがなくなると
共にこのズレのなくなるときの可動側ブッシュ21の回
転によってシリンダ装置9、上下作動パイプ軸12およ
び座席体16が上記横向きとなる場合とは逆の方向に回
転して元の向き(正面向き)に戻る。When the user is seated frontward on the seat body 16 of the above-described embodiment and the user turns to the side and turns sideways while trying to leave the seat body 16, the seat body 16 moves up and down. The pipe shaft 12, the cylinder device 9 and the movable side bush 21 rotate to the same angle (about 90 degrees) as the turning angle of the body, and the inner downward cam 38 and the outer downward cam 43 of the movable side bush 21 and the inner side of the fixed side bush 19 are rotated. The upward cam 28 and the outward upward cam 33 are displaced by the above angle, and the movable side bush 21 is moved upward by this displacement to contract the coil spring 45. When the user stands up after leaving the sideways position and leaves the seat, the movable bush 21 moves downward due to the extension force of the coil spring 45 contracted in the above, and the inner downward cam 38 and the outer downward cam 43 of the movable bush 21 are separated. The displacement of the fixed side bush 19 from the inner upward cam 28 and the outer upward cam 33 is eliminated, and when the movable side bush 21 is rotated when the displacement is eliminated, the cylinder device 9, the vertical operation pipe shaft 12, and the seat body 16 are moved laterally. It will rotate in the opposite direction and will return to the original orientation (frontward).
【0012】尚、上記実施例は、内側下向きカム38の
低所34と内側上向きカム28の高所、内側下向きカム
38の高所35と内側上向きカム28の低所24、外側
下向きカム43の低所39と外側上向きカム32の高所
30および外側下向きカム43の高所40と外側上向き
カム33の低所29が接する位置において座席体16が
正面向きとなるようになっている。In the above embodiment, the lower portion 34 of the inner downward cam 38 and the upper portion of the inner upward cam 28, the upper portion 35 of the inner downward cam 38, the lower portion 24 of the inner upward cam 28, and the outer downward cam 43 are arranged. The seat body 16 faces the front at a position where the low point 39 contacts the high point 30 of the outer upward cam 32 and the high point 40 of the outer downward cam 43 contacts the low point 29 of the outer upward cam 33.
【0013】また、着座した使用者が着席のままにおい
て上体を後方に移動させた場合には、当該上体の移動力
によって座席体16およびサドル部材52がリターンバ
ネ67、68の作用力に抗して後退し、離席した場合に
はリターンバネ67、68の作用力によって座席体16
およびサドル部材52を前端まで戻す。尚、リターンバ
ネ67、68の作用力の強さは着席者が無いときに座席
体16およびサドル部材52を戻すだけの大きさとして
ある。Further, when the seated user moves the upper body backward while seated, the seat body 16 and the saddle member 52 are subjected to the acting force of the return springs 67 and 68 by the moving force of the upper body. When the seat body 16 is moved backwards and leaves the seat, the action of the return springs 67 and 68 causes the seat body 16 to move.
And the saddle member 52 is returned to the front end. Incidentally, the strength of the acting force of the return springs 67 and 68 is set to such a magnitude that the seat body 16 and the saddle member 52 are returned when there is no seated person.
【0014】また、操作レバー75の外端77を手指で
引き上げたときには、当該操作レバー75の内端がスラ
イドピン78を介して押ピン7を押下して開放の状態と
する。この押ピン7が開放の状態にあるときに座席体1
6に着座者の体重や押し下げ方向の外力がかかっていな
い場合にはシリンダ装置9の内蔵バネの力により同シリ
ンダ装置9の上端部8が上昇して座席体16が高くな
り、かかっている場合には同上端部8が下降して低くな
る。この座席体16が高くなる途中または低くなる途中
において操作レバー75に対する上記手指による引き上
げ操作を中断したときには押ピン7が閉止の状態に戻っ
てシリンダ装置9の上端部8の上昇・下降を止って座席
体16が途中の高さで停止する。When the outer end 77 of the operating lever 75 is pulled up with a finger, the inner end of the operating lever 75 pushes the push pin 7 through the slide pin 78 to open the push lever. When the push pin 7 is open, the seat body 1
When the weight of the seated person and the external force in the pushing-down direction are not applied to 6, the upper end 8 of the cylinder device 9 rises due to the force of the built-in spring of the cylinder device 9 and the seat body 16 rises and is applied. At the same time, the upper end 8 is lowered and lowered. When the raising operation of the operating lever 75 with the fingers is interrupted while the seat body 16 is being raised or lowered, the push pin 7 returns to the closed state and the upper end 8 of the cylinder device 9 is stopped from rising and lowering. The seat body 16 stops at an intermediate height.
【0015】即ち、上記の実施例に係る椅子は、着席者
がいなくなると自動的に正面向きに戻り、前方の定位置
に戻り、レバー操作で高さ調節をすることができるもの
である。That is, the chair according to the above-described embodiment can automatically return to the front when the seated person disappears, return to the fixed position in the front, and adjust the height by operating the lever.
【0016】[0016]
【発明の効果】請求項1に係る軸装置は、パイプと、パ
イプ内に回転可能および上下作動可能として設けた、シ
リンダ装置の伸縮作動により上昇・下降できる軸と、パ
イプ内における軸のまわりに回転不能の状態として嵌め
設けた固定側ブッシュと、パイプ内における軸のまわり
の固定側ブッシュより上側の個所にパイプに対しては回
転可能および上下動可能の状態また軸に対しては回転不
能および上下動可能の状態として嵌め設けた可動側ブッ
シュと、固定側ブッシュにおける上端縁面および可動側
ブッシュにおける下端縁面にカム面が相互に接して摺る
状態で設けた上向き傾斜カムおよび下向き傾斜カムと、
パイプ内に可動側ブッシュを押下する状態で設けたバネ
と、を備えたことを特徴とするので、外力が除かれたと
きに自動的に正面向き(前向き)に戻る方向復元機能お
よびシリンダ装置により昇降できる昇降機能の両機能を
果すものであって、第1の目的を完全に達成することの
できるものであり、また、請求項2に係る軸装置は、パ
イプと、パイプ内に回転可能および上下作動可能として
設けた、シリンダ装置の伸縮作動により上昇・下降でき
る軸と、パイプ内における軸のまわりに回転不能の状態
として嵌め設けた固定側ブッシュと、パイプ内における
軸のまわりの固定側ブッシュより上側の個所にパイプに
対しては回転可能および上下動可能の状態また軸に対し
ては回転不能および上下動可能の状態として嵌め設けた
可動側ブッシュと、固定側ブッシュにおける上端縁面の
外周側半分個所および可動側ブッシュにおける下端縁面
の外周側半分個所にカム面が相互に接して摺る状態で設
けた外側上向き傾斜カムおよび外側下向き傾斜カムと、
固定側ブッシュにおける上端縁面の内周側半分個所およ
び可動側ブッシュにおける下端縁面の内周側半分個所に
カム面が相互に接して摺る状態として設けた上記外側上
・下向きカムと反対向き同じ角度で傾斜する内側上向き
カムおよび内側下向きカムと、パイプ内に可動側ブッシ
ュを押下する状態で設けたバネと、を備えたことを特徴
とするので、外側上向きカムと外側下向きカムとの接触
個所が軸の一方に、内側上向きカムと内側下向きカムと
の接触個所が同軸の他方にそれぞれ偏倚して位置し、こ
れ等両方接触個所にバランスよく荷重がかかるものであ
って、軸と同軸が接触する面と間に生ずる接触圧(制動
力)の増大を少なく若しくは無い状態とすることができ
る、軸の回転のスムーズ性の悪化および不快音の発生を
多分に解消できるものであり、第2の目的を完全に達す
ることのできるものである。The shaft device according to the first aspect of the present invention includes a pipe, a shaft that is rotatably and vertically movable in the pipe and that can be moved up and down by the expansion and contraction operation of the cylinder device, and the shaft in the pipe. The fixed side bush fitted in a non-rotatable state, and the part above the fixed side bush around the shaft in the pipe that is rotatable and movable up and down with respect to the pipe, and that is not rotatable with respect to the shaft. A movable bush that is fitted so as to be vertically movable, and an upward tilt cam and a downward tilt cam that are provided such that the cam surfaces are in contact with and slide on the upper edge surface of the fixed bush and the lower edge surface of the movable bush. ,
Since it is equipped with a spring that is provided in a state where the movable side bush is pushed down in the pipe, the direction restoration function and the cylinder device that automatically return to the front (forward) when the external force is removed are provided. The shaft device according to claim 2 fulfills both lifting and lowering functions and can completely achieve the first object, and the shaft device according to claim 2 can rotate in the pipe and in the pipe. A shaft that can be moved up and down and that can be moved up and down by expansion and contraction of the cylinder device, a fixed bush that is fitted around the shaft in a non-rotatable state in the pipe, and a fixed bush around the shaft in the pipe A movable bush installed in the upper part so that it can be rotated and vertically moved with respect to the pipe, and cannot be rotated and vertically moved with respect to the shaft. An outer upwardly inclined cam and outer downwardly inclined cam provided with the cam surface on the outer peripheral side half point is in contact with one another in the lower edge face of the outer peripheral half point and the movable bushing upper edge surface of the fixed side bush,
Same as the above-mentioned outer upward / downward cams, which are provided so that the cam surfaces are in contact with each other and slide at the inner peripheral half of the upper end edge of the fixed bush and the inner peripheral half of the lower end of the movable bush. Since the inner upward cam and the inner downward cam inclined at an angle and the spring provided in the pipe in a state of pressing the movable side bush are provided, the contact point between the outer upward cam and the outer downward cam is characterized. Is located on one side of the shaft, and the contact points of the inner upward cam and the inner downward cam are located on the other side of the same axis, and the load is applied to these two contact points in a well-balanced manner. The increase in contact pressure (braking force) between the contact surface and the contact surface can be reduced or eliminated, and the smoothness of rotation of the shaft and the generation of unpleasant noise can be eliminated. And than, those that can be reached complete second object.
【図1】本発明の実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図2】図1A−A線に沿う断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図3】座席体を回した状態で示す縦断面図である。FIG. 3 is a vertical sectional view showing a state in which a seat body is rotated.
【図4】座席体を後退させた状態で示す縦断面図であ
る。FIG. 4 is a vertical cross-sectional view showing the seat body in a retracted state.
【図5】上下作動パイプ軸とボスの関係を示す分解斜視
図である。FIG. 5 is an exploded perspective view showing the relationship between the vertical operation pipe axis and the boss.
【図6】固定側ブッシュと可動側ブッシュと補助部材の
関係を示す分解斜視図である。FIG. 6 is an exploded perspective view showing a relationship between a fixed side bush, a movable side bush, and an auxiliary member.
【図7】固定側ブッシュの断面図である。FIG. 7 is a cross-sectional view of a fixed side bush.
【図8】可動側ブッシュの断面図である。FIG. 8 is a sectional view of a movable bush.
【図9】脚体に対する座席体の取付部分を示す拡大断面
図である。FIG. 9 is an enlarged cross-sectional view showing a mounting portion of the seat body to the leg body.
【図10】ベース部材とサドル部材の組立を示す斜視図
である。FIG. 10 is a perspective view showing an assembly of a base member and a saddle member.
【図11】同組立を示す分解斜視図である。FIG. 11 is an exploded perspective view showing the assembly.
1 床面 2 ネジ 3 脚柱パイプ 4 C型止リング 5 スラストベアリング 6 受座 7 押ピン 8 上端部 9 シリンダ装置 10 内径孔 11 下端 12 上下作動パイプ軸 13 上端個所 14 スプリングピン 15 延長部 16 座席体 18 内径孔 19 固定側ブッシュ 20 補助部材 21 可動側ブッシュ 22 スプライン歯 23 スプライン溝 24、25 低・高所 26、27 傾斜面 28 内側上向きカム 29、30 低・高所 31、32 傾斜面 33 外側上向きカム 34、35 低・高所 36、37 傾斜面 38 内側下向きカム 39、40 低・高所 41、42 傾斜面 43 外側下向きカム 45 コイルバネ 46 脚体 47 フレーム 48 水平部 49 座盤 50 垂直部 51 背凭盤 52 サドル部材 53、54 案内溝部 55 ベッド部材 56、57 外向き突縁 58、59 滑り部材 60 ボス 61 雌テーパー孔 62、63 係合凹・凸部 65、66 バネ掛け孔 67、68 リターンバネ 69 後端壁 70 板バネ 71 リベット 72、73 端部 74 横軸 75 操作レバー 76 内端 77 外端 78 スライドピン 1 floor surface 2 screw 3 pedestal pipe 4 C type stop ring 5 thrust bearing 6 seat 7 push pin 8 upper end 9 cylinder device 10 inner diameter hole 11 lower end 12 vertical operation pipe shaft 13 upper end part 14 spring pin 15 extension part 16 seat Body 18 Inner diameter hole 19 Fixed side bush 20 Auxiliary member 21 Movable side bush 22 Spline tooth 23 Spline groove 24, 25 Low / high places 26, 27 Inclined surface 28 Inner upward cam 29, 30 Low / high place 31, 32 Inclined surface 33 Outer upward cam 34, 35 Low / high place 36, 37 Inclined surface 38 Inner downward cam 39, 40 Low / high place 41, 42 Inclined surface 43 Outer downward cam 45 Coil spring 46 Leg 47 Frame 48 Horizontal part 49 Seat base 50 Vertical Part 51 Back board 52 Saddle member 53, 54 Guide groove part 55 Bed member 56, 57 Outward protruding edge 58, 59 Sliding member 60 Boss 61 Female taper hole 62, 63 Engaging concave / convex portion 65, 66 Spring hooking hole 67, 68 Return spring 69 Rear end wall 70 Leaf spring 71 Rivet 72, 73 End portion 74 Horizontal axis 75 Control lever 76 Inner end 77 Outer end 78 Slide pin
Claims (2)
下作動可能として設けた、シリンダ装置の伸縮作動によ
り上昇・下降できる軸と、パイプ内における軸のまわり
に回転不能の状態として嵌め設けた固定側ブッシュと、
パイプ内における軸のまわりの固定側ブッシュより上側
の個所にパイプに対しては回転可能および上下動可能の
状態また軸に対しては回転不能および上下動可能の状態
として嵌め設けた可動側ブッシュと、固定側ブッシュに
おける上端縁面および可動側ブッシュにおける下端縁面
にカム面が相互に接して摺る状態で設けた上向き傾斜カ
ムおよび下向き傾斜カムと、パイプ内に可動側ブッシュ
を押下する状態で設けたバネと、を備えたことを特徴と
する方向復元機能および昇降機能を備えた軸をもつ軸装
置。1. A pipe, a shaft which is rotatably and vertically operable in the pipe and which can be raised and lowered by expansion and contraction of a cylinder device, and a fixing which is non-rotatably fitted around the shaft in the pipe. Side bush,
A movable bush installed around the shaft above the fixed bush in the pipe so as to be rotatable and vertically movable with respect to the pipe and non-rotatable and vertically movable with respect to the shaft. , An upward tilting cam and a downward tilting cam that are provided so that the cam surfaces are in contact with and slide on the upper end edge surface of the fixed-side bush and the lower end edge surface of the movable-side bush, and the movable-side bush is pressed in the pipe. A shaft device having a shaft having a direction restoring function and a lifting function, which is characterized by including a spring.
下作動可能として設けた、シリンダ装置の伸縮作動によ
り上昇・下降できる軸と、パイプ内における軸のまわり
に回転不能の状態として嵌め設けた固定側ブッシュと、
パイプ内における軸のまわりの固定側ブッシュより上側
の個所にパイプに対しては回転可能および上下動可能の
状態また軸に対しては回転不能および上下動可能の状態
として嵌め設けた可動側ブッシュと、固定側ブッシュに
おける上端縁面の外周側半分個所および可動側ブッシュ
における下端縁面の外周側半分個所にカム面が相互に接
して摺る状態で設けた外側上向き傾斜カムおよび外側下
向き傾斜カムと、固定側ブッシュにおける上端縁面の内
周側半分個所および可動側ブッシュにおける下端縁面の
内周側半分個所にカム面が相互に接して摺る状態として
設けた上記外側上・下向きカムと反対向き同じ角度で傾
斜する内側上向きカムおよび内側下向きカムと、パイプ
内に可動側ブッシュを押下する状態で設けたバネと、を
備えたことを特徴とする方向復元機能および昇降機能を
備えた軸をもつ軸装置。2. A pipe, a shaft rotatably and vertically operable in the pipe, which can be moved up and down by expansion and contraction of a cylinder device, and a fixed member fitted in a non-rotatable manner around the shaft in the pipe. Side bush,
A movable bush installed around the shaft above the fixed bush in the pipe so as to be rotatable and vertically movable with respect to the pipe and non-rotatable and vertically movable with respect to the shaft. An outer upwardly inclined cam and an outer downwardly inclined cam, which are provided in such a manner that the cam surfaces are in contact with and slide on the outer peripheral half of the upper end edge of the fixed bush and the outer peripheral half of the lower end of the movable bush. Same as the above-mentioned outer upward / downward facing cams, which are provided in such a way that the cam surfaces are in contact with each other and slide at the inner peripheral half of the upper end edge of the fixed bush and the inner peripheral half of the lower end of the movable bush. An inward upward cam and an downward inward cam that are inclined at an angle, and a spring that is provided inside the pipe in a state in which the movable side bush is pressed down are provided. Shaft device having a shaft having a direction decompression and lifting capability to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8171838A JP3054853B2 (en) | 1996-06-11 | 1996-06-11 | Axis device with axis with direction restoration function and elevating function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8171838A JP3054853B2 (en) | 1996-06-11 | 1996-06-11 | Axis device with axis with direction restoration function and elevating function |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2601295A Division JP2814206B2 (en) | 1995-01-20 | 1995-01-20 | Chair |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08317831A true JPH08317831A (en) | 1996-12-03 |
JP3054853B2 JP3054853B2 (en) | 2000-06-19 |
Family
ID=15930702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8171838A Expired - Fee Related JP3054853B2 (en) | 1996-06-11 | 1996-06-11 | Axis device with axis with direction restoration function and elevating function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3054853B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2127560A1 (en) * | 2007-03-22 | 2009-12-02 | Figueras International Seating S.A. | Stationary anchoring foot for chairs positioned at desks |
JP2011122633A (en) * | 2009-12-09 | 2011-06-23 | Hitachi Automotive Systems Ltd | Gas spring device |
CN104290875A (en) * | 2014-10-09 | 2015-01-21 | 江阴市滨江舰船设备有限公司 | Rotary dining chair for boat |
-
1996
- 1996-06-11 JP JP8171838A patent/JP3054853B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2127560A1 (en) * | 2007-03-22 | 2009-12-02 | Figueras International Seating S.A. | Stationary anchoring foot for chairs positioned at desks |
EP2127560A4 (en) * | 2007-03-22 | 2011-03-02 | Figueras Int Seating Sa | Stationary anchoring foot for chairs positioned at desks |
JP2011122633A (en) * | 2009-12-09 | 2011-06-23 | Hitachi Automotive Systems Ltd | Gas spring device |
CN104290875A (en) * | 2014-10-09 | 2015-01-21 | 江阴市滨江舰船设备有限公司 | Rotary dining chair for boat |
Also Published As
Publication number | Publication date |
---|---|
JP3054853B2 (en) | 2000-06-19 |
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