DE2246012A1 - EQUIPMENT FOR PULLING UP OR FOLDING UP BEDS - Google Patents

Description

PATENT LAWYERS: Dipl.-Ing. M ARTI N LIGHT

PATENTANWÄLTE LICHT, HANSMANN, HERRMANN Dr. REI N HOLD SCHMIDT

8 MÖNCHEN 2 TH ERES I ENSTRASS E 33

2246012 Dipl.-Wirtsch.-Ing. AXEL HANSMANN

Diploma Phys. SEBASTIAN HERRMANN

Munich, September 18, 1972

Your mark 'Our mark

vRi / Lü

Stephen G. MOORE

500 Fulton Avenue, Apartment 104

Palo Alto, California

V. St. A.

"Device for pulling up or folding up beds"

The present invention relates to beds and more particularly on devices by which a bed can be moved between a horizontal and a vertical position.

In small houses, apartments, caravans and other residential objects, where there is limited space, it is from Advantage of using beds that can be pulled in against a wall or folded up when not in use. Ver

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are different arrangements for drawing beds in this manner has been developed, including a motorized mechanism that allows a bed to be moved between a raised and a to move to a horizontal position only by operating a switch. Instead of the end of the bed away from the wall to pivot upwards towards the wall, as has been the practice up to now was, the setup described here means that in the The end of the bed near the wall is pulled up, moving the far end of the bed towards the bottom of the wall is pulled.

The lying surface of a bed is usually preferably in a considerable distance above the ground, with heights ranging from 45 to 65 cm are typical. In the case of a pull-in or folding bed with the particular training described, this generally requires that the foot end of the bed stands on feet and rollers that have a certain height or length. If such a foot is rigid the lower part of the foot of a bed is attached, which is in the is pulled up in the particular manner described above, then the bed cannot be extremely close in the pulled-up position be pulled to the wall. The rigid feet keep the foot end of the bed at a distance from the wall. Also prevented the presence of a lifting mechanism between the bed and the wall that the bed can be moved very close to the wall. this requires floor space that would otherwise be available for other purposes and is also not desirable for aesthetic reasons if that Bed is pulled up.

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While pivotable feet have been used at the foot end of the bed in certain known folding beds, the brought used constructions with other inconvenient complications. In particular, complicated control linkages were required or it was necessary to swivel the feet of the bed by hand and, moreover, to close a latch by hand Press to lock the feet in their swiveled out position. This is in contrast to the desirable goal of " to create a simple, compact and economical device that allows a bed to be placed between a raised and a lowered bed Posture can be moved with a minimum of physical exertion.

A bed that can be pulled up or folded up in the manner described above usually requires a facility, means which the mattress is held in the vertical position of the bed. The facilities previously used for this purpose made the bed construction considerably more complicated or required a manual operation when operating the bed Locking parts of the bed. Such facilities can only be compatible with particularly large mattresses, and it is maybe not always possible, a standardized folding or retracting device to match a buyer's existing mattress.

The object of the present invention is a device for Supporting and raising or folding up a bed of the form in which the end of the bed near the wall is raised will to pull the far end of the bed towards the wall, with the bed in a fully upright position Can be pulled up to get close to the wall

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to be located. This is achieved through a construction called support legs or feet of substantial size in order to maintain the bed surface at a desirable height. For this purpose, parallel, vertical lifting parts are used, which are arranged at a sufficient distance from one another that the The raised bed can be accommodated in between, and by pivoting feet in an arrangement that allows the necessary movement the feet and their attachment takes place automatically when the bed is raised and lowered, for which no manual actuation takes place is required to align and lock the feet.

In a preferred embodiment, according to the invention, a more convenient and adaptable device for fastening the Created mattress of a bed, which is subject to the form of movement described above, this device with beds Any dimensions can be combined without complications.

The object on which the present invention is based is therefore to create a device by means of which a bed can be moved between a horizontal position and a fully vertical position in which it is very close to a wall or the like can be in order to achieve a very compact arrangement of the bed in the raised position and without manual actuation of folding feet or the like to make necessary.

The invention is best understood from the following description of a preferred embodiment with reference to the accompanying drawings.

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In the drawings are:

1 is a side elevational view of a pull-up bed according to the present invention, the bed being shown in the lowered position;

FIG. 2 is a side elevational view of the bed shown in FIG. 1 in FIG its raised position,

Fig. 3 is a sectional view taken along the line III-III in Fig. 2, in the means for securing the mattress of the bed are shown in the position in which the bed is in the raised position State is

Fig. 4 is a partial sectional view along the line IV-IV in Fig. 3,

Figure 5 is an elevational view of a portion of the structure shown in Figure 1 with the bed removed to provide the to illustrate motorized equipment for raising and lowering the bed,

FIG. 6 is an elevational view which corresponds essentially to FIG. 5 and shows another manually operated lifting device shows how to raise and lower the bed,

7 is a side elevational view of the lifting device shown in FIG. 6;

FIG. 8 is an elevational sectional view along the line VIII-VIII in FIG. 2, in which the automatic foot mechanism is shown who carries the foot of the bed,

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FIG. 9 is an elevational sectional view along the line IX-IX in FIG. 8; in which the foot construction is further illustrated that the foot end of the bed carries and supports,

FIG. 10 is a sectional view on the same plane as FIG. 9, in which the foot end of the bed is shown as it is lowered from the raised position to the horizontal position will,

11 is a sectional view in the same plane as FIGS. 9 and 10, showing the foot end of the bed when the bed reaches the fully lowered position,

Figure 12 is an elevational sectional view of a portion of the bed having a Modified device for attaching the mattress to the support and pull-up device of the bed,

Fig. 13 is a plan view of the part of the bed shown in Fig. 12,

14 is an enlarged view of an annular holder which in the mattress fastening device according to FIGS. 12 and 13 is used,

15 shows a further view of the ring holder shown in FIG along line 15-15,

16 shows a representation of a modified embodiment of the mattress fastening device shown in FIGS. 12 to 15,

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FIG. 17 is a side elevation view of another arrangement according to FIG present invention in which the bed is shown in the lowered or horizontal position, the intermediate position and the fully raised position is shown in dashed lines,

Fig. 18 is an elevational sectional view of the bed assembly shown in Fig. 17; with the bed occupying the intermediate position,

19 is a sectional view along the line 19-19 in FIG. 2;

2O shows a shortened perspective view of part of the lifting device of the bed arrangement shown in Figs. 17-19, with a lower part of the construction in relation to the middle and upper parts are shown on a larger scale to show certain details of the mechanism better to illustrate

Fig. 21 is a circuit diagram of the electrical circuit of the assembly shown in Figs. 17 to 20 for pulling up a Bed,

22 is a plan view showing another feature of the invention is illustrated,

Fig. 23 is a side sectional view taken along line 23-23 in Fig. 22; in which the extended position of the device shown in Fig. 22 is shown,

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FIG. 24 is a view similar to FIG. 23, but in which the retracted Position of the device shown in Fig. 22 is illustrated,

FIG. 25 is a view similar to FIG. 23 with minor changes an embodiment modified from FIG. 22 and

Figure 26 is a side elevational view of another arrangement in accordance with the present invention.

As shown in the drawings, and particularly Figures 1 and 2, a bed 11 has a rigid rectangular frame 12 which supports a spring box assembly 13 and a mattress 14 of generally conventional design. In order to keep the spring box assembly 13 and the mattress 14 in position, a foot board 16 extends from the frame 12 at the foot end of the bed 11 upward, and a head board 1 7 is provided at the head end of the bed. The headboard 17 comprises an upper part 18 and a lower part 19 which are connected to one another by hinges 21. This articulated design of the headboard 17 serves to hold the spring arrangement 13 and the mattress 14 in place when the bed is pulled up from the horizontal position shown in FIG. 1 into the vertical position shown in FIG upper headboard part 18 can be folded flat onto the head end of the mattress. Clamp arms 22 hinged to each side of the frame 12 can be pivoted to overlie lugs 23 on either side of the top headboard 18, as shown in Figure 2, to maintain the headboard in the folded position. In the lowered position of the bed 11, spring clips engage

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at the lugs 23 to close the headboard in the unfolded position keep.

To further ensure that the mattress 14 is held in the vertical position of the bed, the head end of the mattress can be attached to the headboard 17, as shown in FIGS. 3 and 4. More precisely, the mattress 14 can be enclosed in a suitable fabric sack 14 ′, which has two tubular fabric loops 15 which are arranged in alignment with one another along the upper edge on the lower headboard part 19. One of two aligned rods 20 extends through each such loop 15 and through eyelets 25 which are attached to the headboard portion 19 and one of which is located at each end of the loops 15. Nuts 30 are screwed on each end of each rod 20 to secure the rod in place. The loops 15 can, if necessary, be attached directly to the mattress 14, but the construction described above has the advantage of forming both a protective cover for the mattress and a holder for the mattress.

The subject of consideration is now the device for supporting and pulling up the bed 11. As shown in Figs. 1 and 5, a vertical lifting device 24 is arranged in the vicinity of the head end of the bed 11. The lifting device 24 is preferably on attached to a rectangular backboard 26 which may be attached to a room wall 27 by any suitable means, although the Mechanism itself can also be attached directly to the wall if necessary. The special lifting device 24 shown in FIG. 5 consists of two vertical guide rails 28 which are arranged at a parallel distance from one another and which are fastened to the back board 26

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are. Each guide rail is hollow and has a straight line Slot 29 along the surface facing the bed. The guide rails 28 are at a distance from one another that is somewhat is larger than the width of the bed 11, making the bed between the guide rails can be pulled towards the backboard, as will be described in more detail below.

A rotatable, threaded lead screw 31 runs in each guide rail 28 and is rotatably supported therein by bearings 32 at the upper and lower ends of the associated guide rail. In each guide rail 28 a threaded sleeve 34 is screwed onto each lead screw 31, and an arm 36 extends from the threaded spindle through the slot 29. Each such arm 36 extends on one side of the lower headboard part 19, and a pivot pin 37 extends laterally through the headboard the arm 36 to form an articulated connection between the headboard part and the arm 36. If the arms 36 are moved upwards along the guide rails 28, the head end of the bed 11 is lifted directly upwards and rotates around the axle pins 37 in the course of this movement, so that the foot end of the bed in the direction of the lower end of the guide rails is pulled.

As can be seen from Fig. 5, the upward and downward movement is of the arms 36 caused by the synchronous rotation of the lead screws 31, since the threaded sleeves 34 are caused thereby, move up or down depending on the direction of rotation of the lead screw. This embodiment of the present invention provides a motor-driven device by means of which the lead screws are rotated, so that no noteworthy manual

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Effort is required to raise or lower the bed. For this purpose, each lead screw 31 has a lower end part 38 which extends a short distance over the lower bearing 32 downwards extends out, and a pulley 39 sits coaxially on the end portion 38. The two pulleys 33 are through a Endless belts 41 connected to one another, and the pulleys and the belt preferably have transverse webs 42 through which form-fit synchronous rotation of the lead screws is guaranteed. A reversible electric drive motor 43 is on the Backboard 26 is attached near one of the guide rails 28 and has a driven pulley 44. A drive belt 47 connects the driven pulley 44 to an additional pulley 46 on the nearby extension 38 of the relevant lead screw. The motor 43 is with a manual switch 45 and a control circuit and power supply part 48, the limit switch for automatically turning off the Motors includes when the bed is in the top and bottom positions achieved. By actuating the motor 43 in one direction, the bed can be moved from the position shown in FIG. 1 to that shown in FIG. 2 The position shown can be raised, and if the motor is operated in the reverse direction of rotation, the bed can be lowered.

Other lifting devices can also be used to achieve the same effect. 6 and 7 show a modified lifting device 24 'which can be operated by hand in those cases in which electrical power is not readily available. In this case, the back board 26 '-zw & i carries spaced apart, vertically extending endless chains 49, on each of which one of the bed support arms 26' is attached to form the articulated connection with the head end of the bed in the manner described above.

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A drive shaft 51 is supported in bearings 52 at the opposite lower corners of the rear board 26 *, which are attached to a floor board 53 are attached. The drive shaft 51 runs horizontally and at a small distance from the back board 26 *. At a distance from each other Any drive sprockets 54 located on the drive shaft 51 are fastened. The lower end of one of the chains 49 is seated each sprocket 54. The top ends of the endless chains 49 sit on sprockets 56 that are near the top of the back board 26 'are rotatably mounted by holder 57, so that the two endless chains 49 parallel to one another, perpendicular and in one Distance from each other, which is slightly larger than the width of the bed. By rotating the drive shaft 51 in one direction, the bed is raised, as described above, while rotating the drive shaft in the opposite direction lowers the bed. While the chain lifts are also motor-driven there are cases in which manual operation of the chain lifts is necessary.

In order to carry the necessary parts for the manual operation of the drive shaft 51, two spaced perpendicular ones are provided Boards 58 and 58 * on the back board 26 * and the bottom board 53 in Attached near one of the chains 49. A hand crank 59 is attached to a shaft 61, preferably through the two boards 58 and 58 * runs through bearing plates 62 embedded therein. The wave

61 is rotatable and also movable in the axial direction. One sleeve

62 sits coaxially on the shaft 61 between the boards 58 and 58 * and is connected to the shaft by splines and grooves 63 so that rotation of the crankshaft 61 rotates the sleeve, but the shaft can be moved in the axial direction without the sleeve

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to move. A drive pulley 64 is coaxially attached to the sleeve 62. Another shaft 66 runs under the shaft 61 between the boards 58 and 58 *. The shaft 66 is supported by bearing plates 67 on the boards 58 and 58 ^J and carries two axially spaced pulleys 68 and 69. The pulley 68 has a larger diameter than the pulley 64 of the sleeve 62 ^ by a drive reduction in the hand-operated system and is connected to the drive pulley 64 via an endless belt 71, so that the pulley 68 and thus the shaft 66 and the pulley 69 are rotated by rotation of the crank 59. The pulley 69 is in turn connected to a further pulley 72 on the drive shaft 51 by a further belt 73 in order to transmit the rotational movement of the crank 59 to the drive shaft and thereby raise or lower the bed.

Unlike the lifting device described above, in which the friction and inertia in the motor drive system is sufficient to keep the bed immobile when the drive device is not actuated, the chain elevator device according to FIGS. 6 and 7 may require a locking device in order to hold the bed in place when the crank 59 is released. In this embodiment of the invention, this is accomplished by a flange 74 on the end of the crankshaft 61 which extends through the inner board 58. The flange 74 has axially extending teeth 76 which can come into engagement with teeth 77 on an annular plate 78 which is fixed in coaxial relation to the flange 74 on the board 58 *. This engagement between the teeth 76 and 77 takes place automatically when the crankshaft 61 in the direction of the locking position

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is pressed by a spring 79 coaxial on the crankshaft is arranged between the crank 59 and the outer surface of the outer board 58. The teeth 76 and 77 are thereby separated from each other that the crank 59 is pressed inward. The crank 59 can then be rotated to raise or lower the bed, and when the crank 59 is released it reverses Shaft 61 automatically returns to the locked position in which the bed is held immovable.

Reference is now again made to FIGS. 1 and 2. A retractable foot assembly 81 supports the foot end of the bed 11 in its lowered position and acts automatically in dependence from the movement of the bed. The leg assembly 81 folds back against the frame 12 when the bed is raised so that the bed can be pulled up to a fully vertical position close to wall 27. The foot assembly 81 has the other Ability to return to a bed-bearing and supporting position, when the bed is lowered, and engages in an effective way automatically, so that no manual action is required Actuations at the foot of the bed are required to close the foot assembly in the folded-out position lock.

As can be seen from FIGS. 8 and 9, the foot arrangement is 81 on the two longitudinal side parts 82 of the bed frame 12 via a Mounted rod 83, which runs transversely to the frame and is mounted on the side parts 82 by suitable bearing holders 84, so that make the bar angled relative to the bed can. The rod 83 extends a small distance from the end

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- 15 of the bed, which is justified below.

Two bed support rollers 86 are rotatably mounted on an axle shaft 87, which runs parallel to the rod 83 at a distance therefrom. The rollers are at opposite ends of the rod and are each close to the inner edge of one of the frame side parts 82. The axle shaft 87 is on the rod 83 by four Feet 88 attached, with one of the feet 88 being located on each side of each support roller 86.

i rollers 89 are mounted on an axle shaft 91 which runs parallel to the lower edge of the footboard 16 close to the latter. One of the rollers 89 is arranged at each end of the axle shaft 91, specifically close to the inner edge of one of the frame side members 82, and each roller 89 extends somewhat over the bed frame 12 and somewhat over the footboard 16. The rollers 89 support the foot end of the bed as the bed approaches the upright position by walking up the floor 94 and then up a curved surface 91 of two ramps 92 attached to a floor board 93 on the back board 26. The curved surfaces 91 of the ramps 92 gradually become steeper as the rollers 89 approach the backboard 26. The part of the ramp surface which the roller 89 contacts when the bed is in its vertical position therefore has the steepest incline.

The interaction of the rollers 89 and the ramps 92 as well as the rollers 86 and the pivot legs 88 in the course of the movement of the Bed is illustrated in Figs. 9, 10 and 11, the different Show steps in the course of lowering the bed from a vertical, raised position. As shown particularly in FIG

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is, the foot assembly 81 is when the bed 11 is fully raised folded back in a substantially vertical position on the bed frame and may even run slightly into the frame, since the associated rollers 86 rest on the back board 26. The BodenroUen 89 are in this position on the steep inclined upper part of the ramp surfaces 91. When the motor is operated to lower the bed as previously described, guide the ramps 92 the rollers 89 and thus the foot end of the bed outwards when the bed begins its downward movement. if the downward movement is continued, the rollers 89 leave the ramps 92 and run along the surface of the floor 94. While this introductory part of the lowering movement, as illustrated in Fig. 10, the feet 88 by gravity in an im held essentially vertical position and are therefore practically pivoted relative to the bed frame 12, since the inclination of the bed frame is gradually decreased. At some point in this movement, the rollers 86 contact the floor surface 94, and thereafter, the foot end of the bed is supported by the feet 88 while the floor rollers 89 are lifted from the floor surface. The moment the rollers 86 touch the floor 94, they push the upper end of the feet 88 through the bed frame 12 forces act on the tops of feet 88 from the backboard 26 outwards, while the frictional forces on the roller 86 push the lower end of the feet in the opposite direction. The feet 88 are consequently pressed quickly over their center of rotation in order to assume an inclined position shown in FIG. 11, in which the upper ends of the feet are further from the backboard than the lower ends of the feet. Stop means 96 are provided in order to limit this movement of the feet 88 beyond the center of rotation when the feet have a certain inclination

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degrees, which can be around 70.

The stop 96 can comprise an angled part 97 on each foot 88, which extends upwards from the axis of rotation 83 and in the end of which a pin 95 is screwed which is attached to a stop. bumps when the feet 88 reach the inclination described above. In this embodiment of the invention, a suitable stop is already present on the bed frame 12 in that the feet 88 are arranged so that the pins 95 come into contact with a transverse part 98 of the frame 12 when the feet reach the desired inclination. Smaller adjustments in this inclination of the feet 88 and adjustments to ensure that all four pins 95 touch the transverse part 98 at the same time can be made by turning the threaded pins in the leg parts 97.

As particularly shown in FIG. 11, the abutment of the Pins 95 on the cross-frame part 98 limit the rotational movement of the feet 88, the legs being inclined with respect to the bed frame, so that the weight of the bed holds the leg assembly 81 in the inclined position to thereby achieve a self-locking effect and to carry the foot end of the bed firmly when in use.

When the bed is pulled up, the reverse effect takes place. During the introductory part of the pull-up movement the foot of the bed 11 runs along the floor 94 on the rollers 86, the frame 12 is gradually inclined more until the floor rollers 89 contact the floor 94. Lift after this touch the rollers 86 from the ground and the feet 88 assume a substantially vertical position under the influence of gravity

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a. As shown in FIG. 9, the rollers 89 finally run on the Areas 91 of the ramps 92 upwards, while the feet 88 are vertical Reaching a position and exceeding something.

As best illustrated in Figure 2, is illustrated by the above bed support and pulling device described an essential Achieves space savings and a narrower, more appealing appearance of the bed in the raised position by moving the bed 11 in a fully vertical position can be pulled up in which it stands is close to a wall 27. This will be proportionate with a simple, inexpensive device achieved that does not require any manual manipulation of feet and bolts, as it has been before was the case.

The embodiments of the present invention described above use a mattress bag and a foldable headboard to secure the mattress to the bed when the bed is upright. The mattress bag and foldable headboard are sized to accommodate mattresses of a particular shape, and each particular piece of equipment is normally designed for use with a particular shape of the mattress. While this is a satisfactory arrangement in many cases, especially when the mattress is sold with the other device, there are also cases where a more versatile mattress attachment device is appropriate. Such a facility can enable a buyer to use his existing mattress. It may also be desirable to disable any headboard actuation and attachment associated with raising and lowering the bed.

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avoid. FIGS. 12 and 13 illustrate a modified one Mattress fastening device that fulfills these tasks.

The basic construction of the bed 11 ^'3 Betöconstruktion described above with the following exceptions may correspond to, and thus comprises a spring box assembly 13''and a mattress 14 ", on a frame 12' are worn, the head end of the bed in guide rails 28 * 'is held. In this embodiment, the headboard 17 ″ cannot be folded down and extends upwards only approximately to the level of the upper surface of the mattress 14 ″.

Most currently manufactured mattresses 14 ^J 'comprise upper and lower rectangular frame members 101 and 102, respectively, which are covered by the soft cushioning material 103 of the mattress. A series of retaining rings 104 can be used to secure the mattress 14 ″ to the headboard 17 ″. The rings 104 extend into the soft parts of the mattress to enclose one of the frame parts, such as the frame part 101, and also enclose a cross bar 106 which extends along the adjacent surface of the headboard 17 ″ and is attached thereto. The rod 106 can be attached to the headboard 17 "by passing it through a series of spaced eye bolts 107 which are screwed into the headboard with nuts 108 screwed onto the ends of the rod 106 .

14 and 15 show one form of retaining ring 104, which is particularly advantageous in that it is formed from two semicircular parts 109 and 109 'which at one end through an articulated connection 111 are connected to one another and their

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opposite ends 112 and 112 * pointed in a certain way so that they snap into each other when <the two parts 109 and 109 * are pivoted towards each other to form a circle. The rings 104 of this particular type, which are commercially available, can easily be pressed into the fabric of the mattress 14 * ', since the rings at the joint 11 can be opened to the To facilitate entry into the mattress. It will be appreciated that numerous other shapes of rings can be used. the Rings 104 can also be provided by means other than rod 106 the headboard 17 **. As in Fig. 16, for example is shown, the rings 104, which enclose the mattress bar 106, sit on a series of screw hooks 113 that run into the headboard 17 * * are screwed in.

The mattress support structures shown in Figures 12-16 require no mattress bag, nor is it necessary that a folding headboard is used with the bed. A particular advantage is that the holding device is a Variety of mattress shapes can be customized as the attachment the rod 106 or the screw hook 113 on the headboard 17 * * to adapt to a particular mattress as required can be changed.

Another arrangement according to the present invention is shown in FIG 17-21, where special precautions are taken to simplify the task of making the bed using the present invention. Fig. 17 shows an arrangement that the arrangement shown in Fig. 1 is similar and the lifting device is driven by an electric motor that acts to either raise or lower the head end when the

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Electric motor by means of a control switch 131 on a switch box 132 is actuated. The bed 11 can therefore optionally between the lowered or horizontal position and an upright or vertical position, indicated by the dashed line Line 11 'is indicated.

Referring to Figs. 18 and 19, the construction of the elevator 17 will now be described in more detail. The head end of the bed 11 sits between two spaced apart lifting arrangements 133a and 133b which are attached to a wall. The lift assemblies 133 are preferably made to have a length that is only slightly less than the normal height of rooms in which the device can be installed so that the lift assemblies can be attached directly to the relatively strong components 134, usually the top and lower end of a wall. Appropriate means, such as square head screws 136, are used for this purpose. The hoist assemblies 133 are preferably slightly short,, normally receive than the standard height of a room to eü / va 25 mm or less to manufacturing tolerances, and a suitable washer 137 is inserted between each hoist assembly and the floor, the length of the assembly to adapt exactly to the height of the particular room.

The two lifting arrangements 133 can be of the same design from one another with the exception of some electrical components, which are described below and only on one of the lifting assemblies are provided, in the present example only on the lifting arrangement 133a. As can be seen from Fig. 20, the Lifting arrangement 133a from a rectangular post 138 with angled

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shaped guide parts 139 and 141, which along opposite Run sides of the face of the post that is remote from the wall. The angled guide parts 139 and 141 are located a small distance outward from the front surface of the post 138 so that a flat slide 142 between the angular guide members can be arranged on the front surface of the post. The angle parts 139 and 141 thus have the effect that the slider 142 is held on the post and form a guide that the vertical movement of the slider on the Allows along post. The sliding part 142 carries a holder 143, through which one end of a Betthal sion rod 144 extends and attached is. As shown most clearly in FIGS. 18 and 19, the Betthal sion rod 144 extends through the bed frame 12 at the lower corner of the head end, and causes the synchronized upward movement of the two sliding parts 142 of the lifting assemblies 133, that the head of the bed is pulled up while the bed is lowered by the downward movement of the sliding door.

As can be seen from FIG. 20, it is used to move the sliding part 142 a sprocket 146, which is in a recess 147 on the lower End of the post 138 is arranged and rotatably mounted by means of a drive shaft 1 48 about an axis parallel to the wall is. A pulley 149 is similarly in a slot 151 rotatably mounted which is cut into the upper end of the post 138. One end of a rope 152 is attached to the holder 143 of the Slider 142 attached, and the rope 152 runs up between the Winkelelteüen 139 and 141 and around the pulley 149 and from there down behind the post 138 where it is connected to one end of a drive chain 153. The chain 153 in turn runs down and around the sprocket 146 forwards and upwards,

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where they with the lower part of the slider 142 at an additional Holder 154 is in communication. A longitudinal slot 156 is in cut the face of the post 138 closest to the wall around the adjacent portions of the rope 152 and the chain 153. To "the internal mechanism To cover, an angle part 155 is attached along the outside of the post 138 and runs along the front surface of the Post at a distance from this.

The rotation of the drive shaft 148 in one direction acts over the sprocket 146, the chain 153 and the rope 152 to the sliding part 142 and thus to raise the head end of the bed while rotating the drive shaft 148 in the opposite direction the sliding part and the head of the bed are lowered. It can be seen that the rope 152 together with the chain 153 and the Sliding part 142 form a continuous loop, and that it is possible is to replace the rope with an additional piece of chain, if this is desirable.

Referring now to Figures 18 and 19, the means by which the drive shafts 148 are rotated to raise and lower the head end of the bed on the lift assemblies 133 will now be described. The motor is preferably located below the lowered bed 11 and midway between the vertical lift assemblies 133. In this embodiment, the motor is mounted on an associated reduction gear box 157, which on its side is fastened to a support platform 158 which is fastened to the wall with an upwardly angled rear end. A resilient pad 159 can be placed between the platform 158 and the floor to

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Reduce noise and vibrations. The gear box 157 can be of conventional design and have an output part, which consists of a gear 161 which drives an output shaft 162 which is perpendicular to the axis of the motor, and the gear 161 is rotated by a worm gear 163 driven by the motor through additional reduction gears is driven, so that the power output of the electric motor, which is characterized by high speed and low torque is converted into a rotary movement of the output shaft 162 at a relatively low speed and high torque. As As can be seen from Fig. 19, the output shaft 162 of the gear box extends out of both sides of the gear box and is connected to the drive shafts 148 of both lifting arrangements 133, specifically via suitable couplings 164.

As can be seen from Fig. 20, the control switch described above is 131 attached to the surface of the control switch housing 132, which is attached to the lifting assembly 133a at a convenient height by means of a back plate 167 which is recessed into a corresponding one Space extends in the rear surface of the post 138 and is attached thereto. To stop the bed from moving down, when the bed is level, a normally closed lower limit switch 168 is in a recess 169 located close to the lower end of the post 138 and has an operating lever 171 which is in one position is located in which it is depressed by the beveled lower edge 172 of the slide 142 when the bed is completely has reached the lowered position. By depressing the operating lever 171, the switch 168 is opened. In a similar way Way is to stop the upward movement of the bed after reaching one

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preferably to finish fully upright, a normally closed upper limit switch 173 is provided, which is in a recess 174 near the top of the post 138 is arranged and has an operating lever 176, the so is arranged to be depressed by a beveled upper edge 177 of slide 142 when the bed is the upper limit of travel reached, whereby the switch 173 is opened.

Two further position sensor switches 1 78 and 1 79, which are also normally closed, are arranged in a recess 181 in a central part of the post 138. The switch 178 is used to temporarily interrupt the upward movement of the bed while the bed is in a certain inclined position in order to facilitate certain manual operations at this point in time. The switch 178 is therefore mounted on the lift assembly 133a at a location where the associated operating lever 182 is depressed by the beveled edge 177 of the slide 142 when the bed is at the desired incline. The preferred inclination of the bed can vary depending on the size of the bed and other factors and is selected so that the head end of the bed is at a height where the necessary manipulations and operations can be carried out as comfortably as possible. In a typical case, the switch 178 is arranged to interrupt the upward movement of the bed when about the lower limit of the head end of the bed . 900 mm above the floor.

The switch 1 79 causes the temporary interruption of the downward movement of the bed at approximately the same inclination of the bed and accordingly has an actuating lever 183 which is so arranged

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net is that it is from the lower beveled edge 172 of the slider 142 is depressed when the bed is during its descent achieved this inclination.

As can be seen from Fig. 21, the motor may be of the type having three electrical poles with the application of a voltage on one pair of the three poles the rotation of the motor in one And the application of a voltage to another pair of the three poles causes the motor to rotate in opposite directions Direction evokes. The motor can also be a battery-operated DC motor, but is in the present exemplary embodiment an AC motor and one of the poles is via a key operated safety switch 185 with a Conductor 184 of a normal wall plug 186 connected to the normal power grid can be connected. The other ladder is 187 for the optional raising and lowering of the bed of the wall plug 186 to the movable contact of the three-position control switch 131 connected via a fuse 188 and a separate pole of the key switch 185. The movable one Contact of switch 131 has a middle or off position and can be toggled in one direction to apply voltage to send a first motor pole via position switch 178 and upper limit switch 173, thereby actuating the motor to raise the head of the bed. This movement is temporarily stopped when the bed is in a partially raised position Position is by using the position sensor switch described above 178 is opened. Certain manual operations can be conveniently performed at this point as it continues is described in more detail below. Upon completing these operations, the operator depresses a normally open

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Push-button switch 189 down, which is in parallel with the position sensor switch 178 is switched to continue the upward movement of the bed. Switch 189 only takes a moment to be closed, since once the upward movement of the slide 142 is resumed, the switch 178 will immediately turn itself back on closes to continue re-energizing the motor. As shown in Figure 20, push button switch 189 is preferred attached to the surface of the switch housing 132. The upward movement of the bed is finally terminated by opening the upper limit switch 173 when the bed is fully upright Position.

In a corresponding manner, the bed can be lowered by switching the control switch 131 to another position, at which sent the voltage to a second pole of the motor via position sensing switch 179 and lower limit switch 168 which is shown in the open state in FIG. 21, since the circuit is shown under those conditions which then exist when the bed is completely down. The downward movement of the bed is activated by opening the position sensor switch 1 79 interrupted to enable certain manual operations, as described below, followed by the downward movement of the bed can be continued by depressing a push-button switch 191 for a moment, which is parallel with the Position sensor switch 1 79 is switched. The downward movement will finally terminated by opening the lower limit switch 168 when the bed has reached the fully lowered position. As shown in Fig. 20, the push button switch 191 is preferred attached to the front surface of the control switch housing 132.

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As is also shown in FIG. 20, it is expedient that additional emergency devices are provided to prevent the upward movement of the bed if the limit switches 168 and 1 73 or other electrical parts do not work or work incorrectly. For this purpose, a stop can be provided which, in this embodiment, is a pin 192 that extends from the post 138 protrudes at a point where the lower edge of the slide 142 abuts pin 192 slightly below where the Limit switch 168 is operated. In a corresponding way stands a Pin 193 from the post 138 at a point where a after the protruding finger 194 of the sliding part 142 abuts the pin 193, when the slider reaches a point slightly above where the upper limit switch 173 is is operated. If the mechanism is stopped by the slider 142 hitting one of the two pins 192 or 193 the increased current resulting from the motor stalling will cause fuse 188 to open, thereby causing detrimental effects Prevent effects that could result from continued excitation of the motor.

In connection with the electrical circuit described above, it can be seen that other equivalent forms of means for position determination instead of the special limit switches and position switches that can be used for illustration purposes have been described. The tasks and effects of the position switches 1 78 and 179 can also be used for switching devices be carried out, dt e contained in a single switch arrangement are.

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It is also useful to provide a device by means of which the bed in an emergency, such as the failure of the Mains current, can be pulled up and down by hand. The present invention provides for such a device by means of which this goal can be achieved with a minimum of ■ physical strength. As can be seen from Fig. 18, have gear boxes 157 of the type described above, which are assigned to the motor and use a worm wheel 163, necessarily a bearing shaft 1.63 'for the worm wheel, and this shaft constitutes a device by means of which the lifting arrangement described above has a very high mechanical advantage can be rotated by hand. In order to enable this emergency operation to be carried out by hand, a Passage to be drilled in gear box 157 to one end an extension shaft 194 which is in engagement with the worm gear shaft 163 'so that the rotation of the shaft 194 causes the worm wheel to rotate. Around the shaft 194 To store the end remote from the gear box 157, the front end of the · platform 158 is angled upward, and a Bearing 196 is mounted thereon through which shaft 194 passes. For the manual override, a removable crankshaft 197 is provided, which is long enough to be on the Walk past the foot of the fully lowered bed, although the crankshaft is shown in Fig. 18 foreshortened. One end of the crankshaft 197 is with suitable means for the Drive engagement at the other end of the shaft 194 is provided. The crankshaft This exemplary embodiment has a sleeve 198 at one end which can be placed on the end of the shaft 194, with a cross pin 199 inserted through the sleeve and shaft 194

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can be to create a separable drive connection. The opposite end of the crankshaft 197 is formed in this example with a rectangular cross-section, so that any wrench, such as is normally available in a household, can be placed on the crankshaft. Where a large number of pull-up beds 11 are used, such as in commercial operations, it may be useful to provide a motorized device which can be brought into engagement with the front end of the crankshaft 197 to raise the bed in an emergency and lower.

As can be seen from Fig. 17, constitutes the construction described above a device by means of which the bed 11 merely by actuating the switches on the switch housing 132 from FIG horizontal position to the upright position 11 * and again can be moved back to the horizontal position. Both during the lifting movement and the lowering movement, the bed becomes automatically stopped approximately at the point indicated by the dashed circumferential line 11 ″. The interruption of the movement of the bed in this way, along with certain additional features, which will be described below, facilitates one Series of tasks that generally have to be carried out when raising and lowering the bed.

First of all, it is usually convenient to make the bed in connection with the pulling up of the bed, that is to say to organize and fasten the sheets. It has been found that this task is much easier to perform when the bed is in the intermediate position indicated at 11 " in Figure 17, in part because there is less need to bend over. Further

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According to the invention, the storage of bed pillows 201 is largely relieved when the bed is in the raised position. For this purpose there is a collapsible fabric container 202 for pillows attached to a short headboard 203, which in turn is attached to the frame 12. If that When the bed is in the lowered or level position, the pillow case 202 is empty and between the headboard 203 and the wall compressed. The presence of the kiseen container does not therefore require that the bed 11 be a substantial one Distance from the wall. However, after the bed has been raised to the intermediate position 11 ", the headboard is 203 tilted far enough away from the wall so that the container 202 can receive the pillows. When the upward movement When the bed is resumed, the pillows 202 are moved up and stored above the headboard 203. To the To hide pillows and the pillow case when the bed is in the upright position, a U-shaped ledge 204 can be attached to the Ceiling or at the top of the lift assemblies 133 so attached be that it includes the top of the raised bed the cushion container 203 encloses. As shown more clearly in FIG. 19, the pillow case 202 can be attached to the headboard 203 along a central zone as well as at the ends to form two separate chambers for two cushions 201 if there is is a double bed. As can be seen from Fig. 17, allows the bed to stop moving at the 11 "intermediate position during the bed's downward movement, the cushions 201 can be easily removed from the containers 202 and properly attached to the bed. Because the pillows on have been removed from this point, the container can then be folded up on the headboard 203 so that the

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further downward movement of the bed is not hindered.

As can be seen from Fig. 18, the mattress 14 is at the head end of the bed is held in place by rings 206 which extend into the mattress, preferably around an inner frame portion of the mattress and enclose a rod 207 which is attached to the inner surface of the headboard 203, for example by eye bolts 208, as shown in Figs. It is desirable, however, that additional means be provided to prevent the Bed items, such as a blanket 209 and a sheet 211, to be held by the mattress when the bed is in the upright position is pulled up. For this purpose, a fastening device 212 which can be operated in a convenient manner is provided.

As can be seen from FIGS. 18 and 19, there is the fastening device 212 from a rod 213 which is arranged transversely to the bed and with this at each end by one of two coil springs 114 connected by each end of the rod along the side of the mattress 14 and the spring box 13 to one point on the frame 12, which are close to the head end of the Frame is located. Each spring 114 runs through an equiaxed one rigid sleeve 116. To fix the bedding when the Bed is in the inclined intermediate position, the bar is moved down along the bed so that it is across the the upper part of the bedding and is then released. By the tensile force of the springs 114, the rod 213 is on the bedding tightened. If the bed is temporarily stopped at the incline during lowering, the bar will 216 is moved up to a position near the top headboard 203 where the springs 114 move the rod down between the top

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Pull parts of the headboard and mattress 14. The pods 116 limit the amount that springs 114 pull rod 213 down between mattress 14 and headboard 203, so that the rod remains easily accessible.

With reference to FIG. 19, another extremely useful operation is considered, which can be conveniently carried out with the bed inclined in the intermediate position. A series of short, upwardly extending pins 118 are provided along the top edge of the headboard 203. The pins are preferably curved towards the rear of the bed. A corresponding row of dark circles 119 is provided along the top edge of the duvet 121. This allows the top of the bedspread to be attached along the top of the headboard and along each side of the headboard so that when the bed is pulled up to the upright position 11 * as shown in Figure 17, the bedspread acts as a curtain largely covering the bed. When the bed is then lowered and temporarily stopped at the inclined intermediate position 11 ″ , the bed cover 121 can be detached from the headboard 203 and returned to the normal position of a bed cover, so that the bed in the completely lowered state has the appearance of a bed made normally Has.

The function of the duvet 121 when covering the bed in its vertical position can be enhanced when, as shown most clearly in Fig. 19, the bedspread lengthways is folded because when the dark circles are brought into engagement with the pins 11 8, the folds of the bedspread will cause the bedspread looks like a conventional window curtain

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assumes after the bed is fully pulled up. The pulled up A bed is of course different from a window on closer inspection, but this simulates the appearance of a bed an object usually present in a room has the effect of less emphasizing the presence of the pulled-up bed, and improves the appearance of the bed from an aesthetic point of view.

As shown in FIGS. 1 7 to £ 21, is therefore according to the invention an automatically operating device for temporarily interrupting the upward and downward movement of the bed at an intermediate point created between the horizontal and the vertical position in order to facilitate certain manual operations that must be carried out when raising or lowering the bed. When the bed is partially raised and temporarily stopped there are expandable containers on the back of the headboard in the position to receive pillows, so that they can then carry the pillows up to the top of the pulled-up bed for storage. When the bed is at the intermediate position is stopped, spring means can be used to tighten the tops of the bedding against the mattress and the bedspread can be attached to the edge of the headboard to act as a bed curtain after that Bed is fully raised. In the course of the upward and downward movement, the bed is controlled by position switches in the lifting device stopped, and further switches are provided for resuming motorized movement of the bed after the desired manual operations have been carried out.

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22 and 23 are further details of an embodiment of the invention having an extendable tread assembly shown. 23 is a sectional view along the line 23-23 in FIG. 22, in the direction of the arrows »Such an arrangement is particularly useful for guiding and carrying the rolls of the bed over carpets, uneven floors or the like. at In the embodiments described above, it has been found that any obstacle opposing the rollers at the foot of the ramp tends to overload the motor and drive means as these rollers take substantially all of the weight of the bed at this point and have a tendency to throw up the carpet at this point and push it together. It is not advisable to extend the ramps that have already been provided, as the fixed ramps do not go over the bed should stand out into the room when the bed is in its upright, raised position. As a result an extendable ramp part 220 is provided, which comprises individual ramp parts 222 which serve to place the rollers 86 over a To carry and guide area that extends beyond the boundaries of the fixed ramp part 92. The extended ramp parts 222 are fastened to one another at their outer ends by a transverse part 224. A hook 226 is attached to the transverse part 224, which can be operated with the foot to either pull the telescopic part 220 out or to move it back. The ramp parts 222 slide back and forth in ramp parts 92 and are guided by their side walls. A button 230 is in a slot (not shown) is provided in each ramp portion 92 to act as a stop serve so that the extended ramp part cannot be unintentionally pulled out of the ramp parts 92.

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In order to ensure that the motor 43 is not accidentally supplied with power without moving the part 220 to the extended position before lowering the bed, a microswitch 228 is provided in the circuit of the motor 43. Although not shown in FIG. 21, the microswitch in the motor circuit can be connected in series with switch 168 so that it is effective only in that part of the circuit which controls motor 43 to lower the bed. When the telescopic part 220 is in the retracted position, the switch 228 is open so that no power can be supplied to the motor 43 in this position. ^v

23 shows the extendable part 220 in the extended position, which corresponds to the top view of FIG. 24 shows the extendable part 220 in the retracted part in the rigid ramp part 92 Position. Fig. 25 illustrates a somewhat different embodiment in which the pull-out part 220 is merely a flat one Plate 234 with hook portion 226 attached thereto. In this embodiment, the roller 86 is supported by a front ramp member 236 of the ramp 92 passed onto the plate 234 and vice versa. This is for the purpose of raising and lowering the roller 86 between the Ramp part 92 and the plate 234 effective. The plate 234 forms the desired flat running and support surface for the roller 86 over the Carpet or the uneven floor near the ramp 92. After the roller 86 over the outer end of the extendable part 220 is reached, the part of the weight of the bed which is carried by the roller 86 is reduced to such an extent that the roller 86 is free can roll on the carpet. The extendable part 220 remains in its extended position until the bed is raised again.

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At this point, the pull-out part 220 serves the desired one Purpose of carrying and guiding the rollers 86 over the carpet in the vicinity of the ramp 92. After the bed is fully up, For example, the pull-out part 220 can be retracted again, as shown in FIG. 24.

26 shows an alternative arrangement to that in FIGS. 22 to 25 facilities shown. In this arrangement there is an interlocking switch assembly in place of the ramp extensions provided that make it necessary to manually support the lowering device for the range of motion in which the rollers 86 the leave rigid ramps 92 while the bed 13 is being lowered. This arrangement according to FIG. 26 comprises a switch 240 which is designed in the same way as, for example, the switch 173 (Fig. 20) and in the circuit of FIG. 21 is connected in series with switch 168 and is attached to post 133a at a point at which it breaks the circuit to drive the motor down at the point where rollers 86 exit ramp 92. A Another switch 242, which is connected in parallel with the switch 240, is attached to the bed 13 and by cables 244 and 245 with it a spring 246 or a handle 248 connected. The spring 246 normally holds the switch 242 open so that when power is applied to the circuit for the downward drive, the bed 13 can only be lowered until the switch 240 is reached (which the Corresponds to point at which the rollers 86 leave the ramp 92). The bed 13 remains in this position until the user pulls on the handle 248 pulls, as a result of which a force acting horizontally outwards is exerted in order to support the drive motor in moving the rollers 86 outward along the floor, completing the circuit to drive the motor down. At

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At this point the castors need to roll about two inches to move the top of the bed down the six inches that is required are to release the switch 240 again. At this point there is then the risk of overloading the motor and the Drive device over. Thereafter, the switch 240 remains closed and the handle 248 can be released as the Switch 242 is no longer needed for this operation. Even though Here a pulling device is shown, by means of which the bed can be pulled outwards until the switch 240 closes again is used to complete the motor circuit, a thruster could also be used, such as a (not shown) lever device or the like.

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Claims (21)

224S012 PATENT CLAIM E: Device for pulling up a bed, consisting of a bed frame, an upwardly extending lifting device in the vicinity a first end of the frame and hinged thereto, a bed support and support member attached to the distal end of the Frame is attached to support and support the far end as the frame approaches the raised position, and at least one foot connected to the frame near the distal end, characterized in that the foot (88) is articulated to the frame (12) so that it is pivoted towards the frame when the frame is raised and pivoted outwardly from the frame, when the frame is lowered. 2. Device according to claim 1, characterized in that at least one stop device (96) is provided to hold the foot in a position in which it supports the frame, when it is in the fully lowered position. 3. Device according to claim 1, characterized in that two vertical lifting devices (24) are provided connected to opposite sides of the first end of the bed frame and are spaced from each other so that they have the bed frame between them in the raised position take up. 309829/0345 -40- 4. Device according to claim 1, characterized in that the carrying and supporting part and the foot are mounted on rollers (89 or 86) so that the bed can be moved on it. 5. Device according to claim 2, characterized in that the stop part (96) is adjustable with respect to the position in which the foot is held. 6. Device according to claim 1, characterized by a device by means of which a mattress (14) is held in place when the bed frame is in the raised position is located, visible from a tubular loop flexible material arranged along the upper edge of the mattress and passing through the rods (20) by means of which the mattress is hung in a vertical position. 7. Device according to claim 6, characterized in that the tubular loop is formed in the edge of a sack (14 *) is, in which the mattress (14) is arranged. 8. Device according to claim 6, characterized in that a plurality of fastening devices between the upper end of the Mattress and an upper end of the bed are attached to to keep the mattress in the raised position of the bed. 9. Device according to claim 8, characterized in that the fastening devices are rings (104) which are opened and penetrate the mattress with one end. - 41 _ 309829/0345 10. Device according to claim 8, characterized in that the fastening devices are rings consisting of two semicircular parts (109, 109 *) hinged at one end are connected to each other (111) and at the opposite end (112, 112 ') can be brought into engagement with one another. 11. Device according to claim 3, characterized in that a motor (43) is provided which is in drive connection with the lifting devices (24) and is characterized by a circuit is by means of which the movement of the lifting device at an intermediate position between the raised and lowered Position of the bed frame can be temporarily stopped. 12. Device according to claim 11, characterized in that a manually operable switch is provided with which the motor can be switched on again to start the movement resume the lifting devices past the intermediate position after the lifting devices have passed the intermediate position have been stopped. 13. Device according to claim 1, characterized by a Rod (213) which runs across the bed frame near the raised end of the bed frame and is resilient with the bed frame is connected to secure the bedding on the bed when the bed is in the pulled-up position. 14. Device according to claim 1, characterized in that a bed cover (121) and a folding part (203, 118) are provided are used to attach the duvet to the bed - ^ ^ο0ε -42- can give it the appearance of a wall curtain when the bed is in the raised position. 15. Device according to claim 11, characterized in that a crank device connected to the motor drive device is provided, by means of which the lifting devices can be operated by hand. 16. Device according to claim 1, characterized in that a ramp arrangement (92) is provided which serves to raise the bed easy to lift as it approaches the vertical storage position. 17. Device according to claim 16, characterized in that the ramp arrangement has a rigid ramp part (92) and an extendable one Comprises part (220) which serves to support the distal end of the bed frame during its movement, 18. Device according to claim 17, characterized in that the extendable member (220) comprises a plate (234) with a curved handle (226) to selectively remove the plate from the rigid Pull out the ramp part (92) and pull the plate into the rigid ramp part. 19. Device according to claim 1 7, characterized in that the pull-out part (220) is a ramp extension (222) which retracts into rigid ramp portion (92) for storage when not extended for use. - 43 - 309829/0345 - A3 - 20. Device according to claim 19, with motor-driven lifting devices and an associated control circuit, characterized in that a switch is connected in series with the motor and is attached to the rigid ramp part to be operated by the ramp extension so that the motor circuit only is closed when the ramp extension is pulled out. 21. Device according to claim 16, with motor-driven lifting devices and an associated control circuit, characterized in that a switch circuit is arranged so that it while the bed is being left behind, it can be actuated by this in order to interrupt the motor circuit when the removed The end of the bed frame reaches the outer end of the ramp that a force exerting part is provided which serves to exert an outward force on the distal end of the bed frame, and that an additional switch is provided which bypasses the switch circuit and is connected to the force exerting part is to close the motor circuit during the actuation of the force exerting part. 309829/0345 Blank page