| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a furniture lifting device having a simple mechanism with excellent strength and rigidity and performing a smooth operation.SOLUTION: A lifting device includes: a base frame 1 having casters 3; and a movable frame 2 vertically movably arranged in the base frame. The base frame includes: a lifting block 5 having a vertically directed screw shaft 4 and a nut screwed onto the screw shaft; a pair of right and left swing bodies 6, 7 whose one ends are pivotally attached to both of the right and left sides of the lifting block; right and left transmission bodies 8, 9 journaled by connection to the other ends of the swing bodies and extending in the front and rear direction of the base frame; and right and left driven bodies 10a-10d connected to the transmission bodies and arranged to slide in the right and left direction of the base frame by following the operation of the swing bodies. The movable frame includes parallel links 31-34 where the upper ends are fixed by pivotal attachment to a base frame side and the lower ends are connected to the outer ends of the driven bodies, and which are in a horizontally symmetric posture. The rotation of the screw shaft is converted into the slide motions of the driven bodies via the right and left swing bodies and drive bodies, to thereby allow the postures of the right and left parallel links to rise and fall. Then, the movable frame is lifted with respect to the base frame.</p> |
