X-linked hoisting mechanism

Abstract

In a conventional X-linked hoist mechanism, mechanism elements of other functions are difficult to be arranged because hoist drive elements occupy a wide area under a state where a hoist fame is lowered. Such a configuration that the hoist frame is elevated in the operation of a direct acting actuator in the pulling direction is dangerous because the hoist frame drops when the direct acting actuator is damaged. In a hoist mechanism having a first link (3) and a second link (4) constituting an X-linked mechanism between a base frame (1) and the hoist frame (2), a drive member (11) provided rotatably on the other end side of the second link is provided with a push-up arm (12) and a drive arm (13), a member (15) for guiding a moving member (14) provided at the end of the push-up arm (12) is provided on the other end side of the first link in the length direction, and a direct acting actuator (16) is provided between the other end side of the first link and the drive arm, thus constituting an X-linked hoist mechanism.

Description

technical field [0001] The invention relates to an X-link type lifting mechanism, which is used for beds, diagnostic tables or lifting platforms used in hospitals, home care, facilities, and general use. Background technique [0002] For example, in beds and lifting platforms, as a mechanism for raising and lowering the lifting frame relative to the base frame, a parallel link type lifting mechanism using a parallel link mechanism or an X link type lifting mechanism using an X link mechanism are often used. mechanism, the present invention relates to the latter lifting mechanism. [0003] As a conventional example of the X-link type lifting mechanism, for example, in Patent Document 1 and Patent Document 2, one end of the first link and the second link constituting the X-link mechanism are respectively rotatably fixed to the base frame. and the lifting frame, and at the same time, the moving parts provided at the other end are respectively engaged with the guide parts provi...

AI Technical Summary

Problems solved by technology

1. Since the direct-acting actuator is arranged between one end side and the other end side of the connecting rod across the connecting portion of the first link and the second link, in the state where the lifting frame has been lowered, because the direct-acting actuator The components used for lifting and driving such as the lifter and the lifting arm will occupy a large area in the frame, which makes it difficult to arrange other functional components.

In particular, in order to achieve the lowest possible position and long stroke of the lifting frame in the maximum descending state at the same time, that is, the lifting frame in the maximum rising state becomes as high as possible, and the components for the lifting drive have been enlarged. In the case of

2. In the configuration of raising the lifting frame during the movement of the linear actuator in the stretching direction, if the linear actuator is damaged, the lifting frame will fall, so there is a danger.

Images