Lift bed with belt drive

A lift bed comprising:

• a vertically adjustable bed frame;
• a pulling device for moving said bed frame in the vertical direction;
• two carriages secured to an end face of the bed frame horizontally spaced from one another, and
• each of said carriages is supported to be movable on a vertical guide rail by means of rollers, wherein
• the two carriages are each connected via a pull chain or a toothed belt to a counterweight;
• each pull chain or each toothed belt is guided over a drive wheel at the upper end of the respective guide rail;
• the drive wheels are rigidly coupled via a coupler rod;
• the coupler rod is connected to a main reel which is arranged in vertically spaced relationship with a counter-reel;
• the main reel and the counter-reel are interconnected by a drive belt, said drive belt being used for rotatably driving the coupler rod;
• and
• the counter-reel is adapted to be driven selectively in one direction or the other by means of a motor coupled to a reduction gearing implemented as a self-locking component and used for rotating the coupler rod.

A lift bed comprising:

• a vertically adjustable bed frame;
• a pulling device for moving said bed frame in the vertical direction;
• two carriages secured to an end face of the bed frame horizontally spaced from one another, and
• each of said carriages is supported to be movable on a vertical guide rail by means of rollers, wherein
• the two carriages are each connected via a pull chain or a toothed belt to a counterweight;
• each pull chain or each toothed belt is guided over a drive wheel at the upper end of the respective guide rail;
• the drive wheels are rigidly coupled via a coupler rod;
• the coupler rod is connected to a main reel which is arranged in vertically spaced relationship with a counter-reel;
• the main reel and the counter-reel are interconnected by a drive belt, said drive belt being used for rotatably driving the coupler rod;
• and
• the counterreel is adapted to be driven selectively in one direction or the other by means of a motor coupled to a reduction gearing and used for rotating the coupler rod, and
• wherein the carriages are each bipartite, each part comprising at least one roller and the two parts of a carriage being interconnected in such a way that one part is adapted to be tilted relative to the other part about a horizontal axis extending parallel to the coupler rod and
• each carriage is provided with an adjusting device by means of which the two parts can be adjusted relative to one another.

A lift bed comprising:

• a vertically adjustable bed frame;
• a pulling device for moving said bed frame in the vertical direction;
• two carriages secured to an end face of the bed frame horizontally spaced from one another, and
• each of said carriages is supported to be movable on a vertical guide rail by means of rollers, wherein
• the two carriages are each connected via a pull chain or a toothed belt to a counterweight having a weight that exceeds that of the bed frame;
• each pull chain or each toothed belt is guided over a drive wheel at the upper end of the respective guide rail;
• the drive wheels are rigidly coupled via a coupler rod;
• the coupler rod is connected to a main reel which is arranged in vertically spaced relationship with a counterreel;
• the main reel and the counterreel are interconnected by a drive belt, said drive belt being used for rotatably driving the coupler rod;
• and
• the counterreel is adapted to be driven selectively in one direction or the other by means of a motor coupled to a reduction gearing implemented and used for rotating the coupler rod, and
• wherein the mass of the counterweight is one of exceeding and being less than the mass of the bed frame.