To make it possible to pleasantly rotate a spring holder independently from a pivot on which a weight of a load-carrying platform acts and which receives a large rotational friction resistance (that is, without being affected by the large rotational friction resistance) when angularly displacing the spring holder for fixed position adjustment thereof in a load-carrying platform lifting device in which the spring holder, that holds one end of a torsion spring for assisting a rotating force of the load-carrying platform, is attached to a lifting support frame via a position adjustment mechanism which can angularly displace a fixed position with respect to the lifting support frame around an axis of the pivot of the load-carrying platform, and to improve rotating operability of the same.SOLUTION: In a load-carrying platform lifting device L, a spring holder H, which holds one end Sa of a torsion spring S, is fixed to a lifting support frame 14, the spring holder H is attached to the lifting support frame 14 via a position adjustment mechanism A which can angularly displace a fixed position thereof with respect to the lifting support frame 14 around an axis of a pivot P of a load-carrying platform 1, and is located so that relative rotation between the spring holder H and the pivot P is permitted during angular displacement.SELECTED DRAWING: Figure 7
【課題】荷受台の回動力助勢のための捩りばねの一端を保持するばねホルダが、昇降支持枠に対する固定位置を荷受台の枢軸の軸線回りに角変位可能とする位置調節機構を介して昇降支持枠に取付けられ荷受台昇降装置において、ばねホルダをこれの固定位置調節のために角変位させる場合に、荷受台の重量が作用して大きい回動摩擦抵抗を受ける枢軸から独立して(即ちその大きい回動摩擦抵抗の影響されずに)ばねホルダを軽快に回動させられるようにし、その回動操作性を高める。【解決手段】荷受台昇降装置Lにおいて、昇降支持枠14には、捩りばねSの一端Saを保持するばねホルダHが固定され、ばねホルダHは、これの昇降支持枠14に対する固定位置を荷受台1の枢軸Pの軸線回りに角変位可能とする位置調節機構Aを介して昇降支持枠14に取付けられ、且つ上記角変位の際にはばねホルダHと枢軸Pとの相対回転が許容されるように配置される。【選択図】図7
LOAD-CARRYING PLATFORM LIFTING DEVICE
荷受台昇降装置
2023-04-11
Patent
Electronic Resource
Japanese
IPC: | B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS |
European Patent Office | 2020
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