FR2659005A1 - Height-adjustable bed - Google Patents

Abstract

The present invention relates to a bed of "mezzanine" type, including four pillars (1) inside which are inserted gas thrustors (15, 17, 13, 20). The bed frame assembly rests on these thrustors, and the frame is equipped with a winder making it possible simultaneously to wind up the straps (11), one end of which is fixed to the base of the pillars (1), thus causing the bed to be lowered into the position of use. A locking means (13, 14) provides holding in the chosen position. In another embodiment, the strap and winder system is replaced by a rack and wheel system inserted in the pillars (1).

Description

The present invention relates to a height-adjustable bed, of the t'mezzanine type.

Traditionally, beds of this type are supported by four solid wooden pillars, the bed being placed at a height of about 1.80 m so as to allow the use of the space located under the bed, for example to place a desk, shelves or seats, allowing a more rational use of the living space.

Access to the bed is via a staircase which can be attached, or be part of the whole.

However, these achievements have a major drawback. Indeed, in most apartments, the ceiling height does not exceed 2.50 m, and therefore, the height remaining between the ceiling and the bed is twist 80 cm.

This reduced height makes it difficult to use the bed and causes the user to feel unpleasant.

The device according to the invention is intended to remedy this drawback.

It consists of four solid wooden pillars, each pillar being provided with a groove in which an element integral with the bed frame can slide, each pillar further comprising one or more gas struts which tend to push the bed frame back. its maximum height. When using the bed, the user can lower the bed to the desired height by means of a winding device integral with the bed frame, a device on which four straps are wound, each having one end fixed to the winding device, and the other end fixed in the vicinity of the base of each pillar.

Return pulleys located at the corners of the frame allow the straps to stay along the pillars.

When the winding device is actuated, the frame is biased downwards with sufficient force to oppose the action of the jacks, to the desired position in which it is held by means of a locking device .

After use, the operating device is unlocked and the bed rises to its initial position.

The invention will be better described from the appended drawings in which:
Fig.1: shows a partial front view of the device according to the invention.

Fig. 2: A top view of the bed frame, the pillars and the operating device.

Fig. 3 and Fig. 4: a variant of the operating device.

According to a preferred embodiment, the system comprises four solid wooden pillars (1) in which notches (2) are arranged intended to receive metal profiles (3) of generally rectangular section, fixed in the notches (2) by known means, such as screws, and having a groove allowing the passage and the sliding of two metal plates (4) made integral with the uprights (5) of the bed frame by screwing.

The profile (3) has on the outer part of the pillar (1) two wings (6) which prevent the exit of the ends of the plate (4) from the profile (3) thanks to a retaining lug (7) made integral with the plate (4). Two pulleys (8) are mounted idly on each plate (4), and a reel (9) integral with a crank (10) allows the simultaneous winding of the straps (11) of which one end (12) is fixed to each pillar (1), and the other end of which is fixed to the reel (9), said reel comprising a ratchet wheel (13) cooperating with a pawl (14) allowing the bed to be immobilized in a determined position.

The ends of the plates (4) rest on a gas spring (15) via a spacer (16). Depending on the desired stroke, the end of the rod (17) of the jack (15) is screwed into a fitting (18), into which the threaded part on the cylinder side of the second jack (13) is also screwed.

The end of the rod (20) of the second cylinder (19) is itself screwed into a plate (21) made integral with the pillar (1).

During the winding of the straps (11) on the drum of the reel (9), these cause a traction on the plates (4) which compress the gas cylinders.

The pawl (14) locks in the stop position.

After use, the bed can be raised by exerting pressure on the crank (10) allowing the ratchet (14) to be unlocked, the jacks then ensuring the raising of the bed to its maximum level. According to a variant of the invention, the straps can be replaced by a rack system. A rack (22) housed in each pillar (1) is in contact with a toothed wheel (23) whose axis is integral with a second wheel (24) which receives a toothed belt (25).

The toothed belt (25) is tensioned between the two wheels (24). Symmetrically, the same assembly is adopted on the opposite side of the bed.

One of the wheels (24) is rotated by a wheel (26) with complementary teeth and a diameter smaller than that of the wheel (24) so as to allow the passage of the belt (25).

The profiles (27) inserted in the pillars (1) have only one wing (28) to allow the passage of the belt (25), and the upright (29) is machined so as to allow the passage of the mechanism.

Other variants are conceivable, such as the motorization of the manual control by a geared motor, the replacement of the straps by cables, or the replacement of the toothed belt by a chain.

The bed according to the invention finds use whenever it is necessary to optimize the living space, such as studios or chalets.

Claims (6)

1 - Height-adjustable bed of the four-pillar type, characterized in that it comprises plates (4) integral with two uprights (5) of the bed, each plate (4) coming to bear at one end of a compressible member consisting of at least one gas cylinder (17,15) integrated in the pillar (1), the other end of said compressible member being integral with the pillar (1), and means making it possible to overcome the thrust of the cylinders to move the bed down as well as a means for locking the bed in the desired position. 2 - Height adjustable bed according to claim 1, characterized in that each pillar (1) is provided with a groove (2) in which is inserted a profile (3) integral with the pillar (1). 3 - Height-adjustable bed according to claims 1 and 2 characterized in that the plates (4) include a lug (7,30) bearing on at least one wing (6,28) of the profile (3,27) for maintain said plates in the profile. 4 - Height-adjustable bed according to claim 1, characterized in that the means for moving the bed down consist of straps (11), one end (12) of which is fixed to the pillar (1), said straps ( 11) passing over idle pulleys (8) whose axis is secured to the bed frame, the other end of each strap (11) being fixed on a reel (9) whose axis is also secured to the bed frame. 5 - Height-adjustable bed according to claim (1), characterized in that the means making it possible to move the bed down are constituted by racks (22) integral with each pillar (1) in which toothed wheels ( 23), integral in rotation with toothed wheels (24), linked in pairs by a toothed belt (25), the drive of two of the toothed wheels (24) being obtained by means of two toothed wheels (26) connected to the operating device. 6 - Height adjustable bed according to claim 1, characterized in that the locking means consists of a ratchet wheel (13) and a pawl (14).