JP2012140074A5

JP2012140074A5 -

Info

Publication number: JP2012140074A5
Application number: JP2010293505A
Authority: JP
Filing date: 2010-12-28
Publication date: 2014-01-09
Anticipated expiration: 2030-12-28

Description

本発明による有段リフタ装置は、基部への枢着部と昇降体への枢着部を有する昇降リンク；上記基部と昇降体のいずれか一方に枢着されていて、該枢着軸を中心とする円弧上に位置するリンクピニオンを有し、上記昇降リンクと連動して揺動する有歯リンク；上記リンクピニオンを介して上記有歯リンクを揺動させ、上記昇降体を昇降させる昇降機構；上記昇降体と基部のうち、上記リンクピニオンの円弧中心となる枢着軸を有する側の部材に、中立位置と、上昇位置と下降位置の少なくとも一方との間で往復揺動操作可能に支持された入力部材；上記入力部材に支持された、上記リンクピニオンを連動回転させる運動伝達ラチェットと係脱するラッチ；上記入力部材が中立位置から上昇位置方向または下降位置方向に揺動操作されるたびに、該ラッチと運動伝達ラチェットの噛合により上記有歯リンクを上昇方向または下降方向に回動させるラッチ制御機構；上記有歯リンクが上方昇降端または下方昇降端に達した状態でさらに入力部材が中立位置から上昇位置方向または下降位置方向に操作されたとき、上記ラッチを運動伝達ラチェットに対して相対回転させる空振り機構；を有することを特徴としている。 The stepped lifter device according to the present invention includes a lifting link having a pivoting portion to the base and a pivoting portion to the lifting body; pivoted to one of the base and the lifting body and centering on the pivoting shaft. A toothed link having a link pinion located on an arc and swinging in conjunction with the lifting link; a lifting mechanism for swinging the toothed link through the link pinion and lifting the lifting body A member on the side having a pivot shaft serving as the center of the arc of the link pinion is supported so as to be reciprocally swingable between a neutral position and at least one of an ascending position and a descending position; An input member that is supported by the input member; a latch that engages and disengages a movement transmission ratchet that interlocks and rotates the link pinion; and whenever the input member is swung from a neutral position to an ascending position or a descending position. In Further input member neutral in a state where the upper Symbol toothed link has reached the upper lifting end or lower elevation end; latch control mechanism for rotating the upward or downward direction the toothed link by meshing motion transmission ratchet with the latch And an idling mechanism for rotating the latch relative to the motion transmission ratchet when operated from the position to the ascending position direction or the descending position direction.

以上の、コントロールレバー２０、上昇ラッチ２７及び両方向運動伝達ラチェット２３は、コントロールレバー２０が中立位置から上昇位置に揺動操作される度に、上記リンクピニオン１５を介して有歯リンク１０Ｔを上昇方向に揺動させ、ベースプレート１３を有段で上昇させる上昇機構を構成し、コントロールレバー２０、下降ラッチ２８及び両方向運動伝達ラチェット２３は、コントロールレバー２０が中立位置から下降位置に揺動操作される度に、上記リンクピニオン１５を介して有歯リンク１０Ｔを下降方向に揺動させ、ベースプレート１３を有段で下降させる下降機構を構成する。これらの上昇機構及び下降機構で昇降機構を構成する。 Above, the control lever 20, increase the latch 27 and bi-directional motion transmission ratchet 23, each time the control lever 20 is swung to the raised position from the neutral position, rise direction toothed links 10T through the link pinion 15 The control lever 20, the lowering latch 28, and the bi-directional motion transmission ratchet 23 are swung from the neutral position to the lowering position each time. In addition, a lowering mechanism is configured in which the toothed link 10T is swung in the downward direction via the link pinion 15 and the base plate 13 is lowered stepwise. These raising and lowering mechanisms constitute an elevating mechanism.

Claims

A lifting link having a pivot point to the base and a pivot point to the lift;
A toothed link pivotally attached to one of the base and the lifting body, having a link pinion located on an arc centered on the pivoting shaft, and swinging in conjunction with the lifting link;
A lifting mechanism that swings the toothed link via the link pinion and lifts the lifting body;
Of the lifting body and the base, the member having the pivot shaft that is the center of the arc of the link pinion is supported so as to be capable of reciprocating swinging between the neutral position and at least one of the raised position and the lowered position. Input members;
A latch that is supported by the input member and that engages and disengages a motion transmission ratchet that interlocks and rotates the link pinion;
A latch control mechanism for rotating the toothed link in the ascending direction or the descending direction by the engagement of the latch and the motion transmission ratchet each time the input member is swung from the neutral position to the ascending position direction or the descending position direction;
When the upper Symbol toothed link further input member in a state that has reached the upper lifting end or lower elevation end is operated in the raised position direction or lowered position direction from the neutral position, are rotated relative to the latch against motion transmission ratchet Idle swing mechanism;
A stepped lifter device comprising:

The stepped lifter device according to claim 1,
The input member is provided with a pair of ascending latch and descending latch,
The latch control mechanism disengages the descending latch and the motion transmission ratchet when the input member is swung from the neutral position to the ascending position, and lifts the toothed link by engaging the lifting latch and the motion transmission ratchet. When the input member is swung from the neutral position to the lowered position, the raised latch and the motion transmitting ratchet are disengaged, and the same toothed link is lowered by engaging the lowered latch and the motion transmitting ratchet. A stepped lifter device that rotates.

3. The stepped lifter device according to claim 1 or 2, wherein the idle swing mechanism is constituted by a toothless region formed in a motion transmission ratchet.

The stepped lifter device according to any one of claims 1 to 3,
The toothed link has a link ratchet coaxial with the link pinion,
further,
The neutral position of the input member meshes with the link ratchet to prevent the lifting link from swinging downward, and the input member is allowed to swing downward when the input member is swinged downward. A lowering prevention latch mechanism; and a lowering swing of the lifting link allowed to swing downward by the first lowering prevention latch mechanism is allowed for one link ratchet tooth, and further lowering swinging of the lifting link is prevented. A second descent prevention latch mechanism that engages with the link ratchet for
A stepped lifter device.

The stepped lifter device according to claim 4, further comprising:
A friction mechanism that provides resistance to rotation of the toothed link and resistance to descending movement of the lifting body when the input member is swung in a downward direction from a neutral position;
A stepped lifter device.

6. The stepped lifter device according to claim 5, wherein the friction mechanism meshes with a friction gear having a constant pitch of friction teeth on a peripheral surface thereof, which rotates in conjunction with the rotation of the toothed link, and the friction teeth of the friction gear. A stepped lifter device including a friction latch.

The stepped lifter device according to any one of claims 1 to 6, wherein the elevating link and the toothed link are separate members, and are pivotally attached to the elevating body on the same axis.

The stepped lifter device according to any one of claims 1 to 6, wherein the elevating link and the toothed link are separate members, and are pivotally attached to the elevating body by a shaft separated from the front and rear, and via a connecting link. Interlocked step lifter device.

The stepped lifter device according to any one of claims 1 to 6, wherein the elevating link and the toothed link are the same member.