DE8711567U1 - Drive for slatted frames - Google Patents

Description

Dlpl.-lng, W. Dahlkf-TV : W: &Ggr;&igr; :*
DipUng. H.-J. LippeVt"""" . "

Patent attorneys 5

ftarikenforster Straße 137
50&THgr;0 Berglsoh Gladbaoh 1

25, August 1987 D/Sw

&Ngr;&Idigr;&Kgr;&Ogr; Drive technology 5253 Lindlar

"Drive for slatted frames"

The invention relates to a drive for slatted frames as parts of loungers or beds, with a pivoting head part, middle part and pivoting foot part, whereby the head part, which can pivot about an axis in the longitudinal beams, can be pivoted by a bracket which slides on its side bars and which is connected in a rotationally fixed manner to a shaft mounted in the longitudinal beams*, whereby the foot part is also connected in a rotationally fixed manner by an articulated connection to a second shaft mounted in the longitudinal beams and whereby each of the two shafts carries a lever arm which projects upwards in the position of use of the slatted frame^ and is connected in a rotationally fixed manner to it and whereby finally the two lever arms are each articulated to an independent drive.

Such drives for slatted frames with pivoting headboard and pivoting footboard are already known.

g ₀ Such slatted frames are used as a base for beds so that the person can take a more comfortable position either for the torso or the legs of the body by adjusting the pivoting parts of the slatted frame. By operating a

_g5 Control mechanism ¹ of the mostly electric drives for the headboard and the footboard, the movable parts of the slatted frame are moved up or down.

6
! swings.

However, such slatted frames are usually very expensive because the drives are firmly connected to the base frame and a complex and heavy construction is required.

In addition, in case of damage to the mechanics

or the electric drive necessary, these units

jQ gate to be removed, repaired and then reinstalled

which requires a considerable amount of time.

&iacgr; is borrowed. During this time, the slatted frame or

the lounger cannot be used.

J ₄ ^ The individual drives known for this purpose also require

$ 15

ti connecting cables that interfere with operational safety and

must be removed during repairs.

There are also individual drives that are individually encapsulated and installed at different points in the bed *

However, this does not meet today's design requirements because the overall view is very rugged.

Double drives have also been discovered, with 25

which use expensive gears for power transmission

' For this reason, such double

operations have not yet been able to establish themselves. The invention

The aim is to create a drive for slatted frames that replaces the previous individual drives '- 30

replaced, allowing quick installation or removal

and is also considerably cheaper in terms of production costs than the known single drives and also double drives. In particular, the new drive should also be able to be easily integrated into the existing BeSi..*i aq concepts.

This task is solved by the two

Drives are located in a common housing which is arranged between the two shafts and below the fixed middle part of the slatted frame and is supported by these, each drive having a |

Lever arm of the associated shaft by means of slightly protruding

removable bolt, a spindle drive nut, and an electric motor, and that two sliding thrust pieces arranged parallel to one another are articulated to each of the two motors by means of two pins projecting radially from the receiving flange for the spindle, which are designed at their other ends, projecting from the front of the housing, to receive the shafts and to support them.

The drive according to the invention can be easily

between the shafts of the slatted frame that move the pivoting headboard or the pivoting footboard, without additional brackets.

Due to the special design of the drive, the

Can also be used with different distances between the control shafts for the head and foot sections. This means that the drive can be adapted to different existing

Fitting concepts can be adapted. 25

The two shafts are preferably driven by a spindle that is connected to a lever arm attached to the shaft. A nut moves on the spindle and is connected to the lever arm by means of a bolt.

By means of a rotary movement of the motor, which is preferably connected to the spindle via a gear, §iGh turns the spindle and thus pulls the nut», which is connected to the upwardly pointing arm of the shaft, towards its other end when the overhead roller is pulled.

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! or the foot section is to be raised. When the head or foot section of the bed is moved downwards, the spindle is turned in the other direction by the motor, with the lowering of the moving parts being supported by gravity.

However, when raising the head or foot section, considerable forces must be transferred to the shaft. To ensure that the drive unit, consisting of the motor and the gearbox, does not move out of position when these forces are transferred, it is supported against the shaft by the two thrust pieces, whereby the shaft can rotate in recesses in the thrust pieces or similar and the rear ends of the thrust pieces

,_ by means of two protruding pins on the mounting flange Ib

of the gearbox.

In this way, the entire system can be easily supported against the moving shafts without the need for additional holding devices,

struts or stiffeners must be attached to a normal slatted frame.

In the device according to the invention, motors are used to drive the spindles, the drive shaft of which can run in both directions.

The device according to the invention has a simple structure and a small installation depth.

compact, space-saving design, the space requirement is 30

The costs of storing and shipping the drives are reduced and a more attractive design can easily be achieved.

After installing the drive in a slatted frame, its packaging dimensions are reduced and the free space &psgr;,

enlarged below the bed. I

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^ The device has a simple construction and is easy to repair if necessary, although the susceptibility to repair is very low anyway.

The device according to the invention can be installed or removed with a speed previously unattainable with double drives. This is also achieved by the fact that it is not necessary to remove parts of the fitting in order to remove the device.

IO

A further advantage of the device according to the invention

is that it always remains in the same position underneath the slatted frame, which was not possible with the previous individual drives.

15

Another advantage is that due to the

The special design of the device automatically bridges tolerances in the shaft spacing that arise due to the fact that the parts of the fitting are inaccurate

be built into the wooden parts. Such deviations 20

in the wave spacing lead to the known

Drives to incorrect swivel ranges. This means that, for example, the head section cannot be raised to its highest desired angle position or

cannot be lowered to the lowest desired position 25

can.

Larger differences in the distances between the shafts, which are not caused by such small tolerances, but by

different constructions of the slatted frame with different

30

different manufacturers are also

automatically compensated. You will then select a housing of the appropriate length.

Finally, with the device according to the invention it is possible to encapsulate all individual parts in a simple and inexpensive way and thus to protect them against

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To prevent dust from entering and to exclude dangers for operators, the housing of the device, which is open on both sides, is covered with caps after installation, which only have slots on their sides for sliding over the shafts. Such encapsulation is not possible with the known individual drives.

The housing in which the drives are arranged preferably consists of a one _- piece channel with an approximately rectangular cross-section and is open on both sides. This design is particularly useful because such a channel can be produced, for example, by extruding aluminum and can be cut to size depending on the length of a bed or the distance between the two shafts. At the same time, the bottom or top of the housing can be provided with guides for the thrust pieces, which can be easily inserted between the gears and the shafts during assembly.

These guides are preferably designed in such a way that the entire housing can be reinforced by inserting stiffening parts between the guides.

The drive units arranged in the housing are

preferably arranged offset. In this way, the housing can be kept very small; in addition, this results in a favorable distribution of force when the drives are running.
30

In addition to the drive units, the housing preferably contains a component in which the electrical circuits and controls for the two independent drives are housed, invisible from the outside.

are required. They are preferably installed over a 4m Inner or below the slatted frame

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Vf ifinding connected to an external power source or an actuator holder*

To remove the drive unit» for example in a Defect of the system» If the required Construction only two bolts, which the respective Nuts of the spindle drives with the lever arms of the waves» so that the entire Device very simple and easy to dismantle

1Ö can and a replacement unit can be installed in a few minutes is» so that the couch or the bed a short time later can be used again.

In order to limit the upward and downward movement of the head and foot sections of the slatted frame, limit switches can be installed at suitable locations. These are connected to the control part of the drives and switch off the motors as soon as the end position of one of the moving parts of the slatted frame is reached. This provides additional safety for the person lying down.

In the simplest case, the nut of the spindle drive is fork-shaped at its end and has a cross hole there. Using an easily inserted and removable bolt, an articulated connection can be made to the end of the lever arm on the shaft.

Preferably, however, the spindle drive is provided with a longitudinal slack. This has the advantage that when lowering the moving parts of the slatted frame, no additional force is exerted on the lever arms and pinching and injuries to

g ₅ persons. This slack is preferably created by the spindle drive, in addition to the spindle connected to the gear motor, having a

illustrated and described in detail below using the drawing. They show:

Fig. 1 a side view of a slatted frame with pivoting headboard and two-part

pivoting base part and the housing of the drive according to the invention,

Fig. 2 a plan view of the slatted frame in direction g ₀ of arrow II in Fig. 1,

Fig. 3 a broken top view of the housing with the drives from direction III-III in Fig. 1 ,

Fig. 4 a partially broken side view

from direction IV-IV in Fig. 3,

the spindle includes a nut screwed onto it* which is held in a U-shaped bracket that can be moved longitudinally but is secured against rotation. The two legs of this bracket run parallel to the spindle axis and can be connected at their free ends by means of a bolt to the free end of the lever arm in question. The longitudinal movement of the nut relative to the bracket is limited in one direction by the crosspiece of this bracket and in the other direction by a screw placed on the end of the spindle.

Preferably, spring packs are arranged on the ends of the spindle, which provide an elastic hold when the nut hits one of the two stops and protect the gear from overload. This also prevents sudden impacts on the other moving parts.

The invention is shown in the drawing, for example &iacgr;

te »*·» &diams; ·

^ Fig. 5 a top view of the housing with a

Drive from direction VV from FIg, 3 _S

Fig. 6 is a plan view of a preferred embodiment of the spindle drive and

Fig. 7 is a section along the line VII-VII in Fig. 6.

j The slatted frame 1 shown in Fig. 1 consists essentially of a head section that can be pivoted about an axis 11 with longitudinal beams 3, 4 and slats 15 fastened thereto in the transverse direction, a fixed middle section with the longitudinal beams 12, 13 and the transverse slats 15, a

_ two-part foot part that can be pivoted around an axis 14, 15

which are connected to each other by the joint connection 20 Are, whereby the part pivotable about the axis 14 consists of the longitudinal beams 16, 17 and the part hinged to them consists of the longitudinal beams 18 and 19. In the transverse direction

The foot part is again supported by slats 15. 20

The headboard, middle section and footboard rest on a frame with the longitudinal beams 3, 4 and the cross beams 5, 6.

Under this frame is approximately halfway between

two shafts 9, 21 and a housing 2 for receiving the drives are arranged.

The swiveling of the head part is done by a Bracket 10, which is fixed to the longitudinal beam 3 and 4

mounted shaft 9. The correspondingly arranged lever 22 of the foot part is connected to two links 24, 25 via an axle 23.

These links 24, 25 have different lengths in order to adjust the

two-part foot part of the slatted frame can be brought into different horizontal positions, which roughly corresponds to that of a patient’s bent, raised leg. The handlebar 24 grips

B has one end connected to the joint 20 between the two parts of the foot part, the handlebar 25 is hinged to the longitudinal beam 19 of the second foot part.

In Fig. 3, the position of the drives for pivoting the head section and the foot section of the slatted frame 1 in a common housing 2 can be seen.

The upper plate 34 of the housing 2 is removed.

&Idigr;5 The drives consist in detail of a motor 47 or 147, a gear 46 or 146, and a receiving flange 44 or 144, which receives a spindle 48 or 148 and is connected to the gear by means of a connecting piece 45 or 145. The spindle 48 or 148 carries at its outer end a nut 49 or 149 which engages with it and which is connected to the shaft 9 or 21 via a lever arm 30 or 130 by means of an easily removable bolt 31 or 131 which is let into a hole in its head part 32 or 13'2. Between the shaft 9 or 21 and the connecting flange 44 or 144, two parallel thrust pieces 41, 42 or 141, 142 are arranged. These thrust pieces 41, 42 or 141, 142 protrude from the front side of the housing 2 and encompass approximately

QQ semicircular the shaft 9 or 21. At the opposite end they are connected to the connecting flange 44 or 144 by means of pins 43 or 143 running in the radial direction.

g ₅ Since the lever arms 30 and 130 extend upwards, when the head part or the foot part of the slatted frame 1 is swivelled up, the spindle 48 or 148 with its nut

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&bull; « * * spindle 15 the mi t the

_&lgr; 49 or 149 and the connecting flanges 44 or 144 connected to the spindle 48 or 148 at the other end are subjected to tensile stress, so that the freely suspended drive unit, consisting of the gear 46 or 146

,- and the motor 47 or 147 via the pins 43 or 143 projecting outwards in the radial direction from the flange 44 or 144 against the thrust pieces 41, 42 or 141, 142 and so, since these thrust pieces 41, 42, 141, 142 are supported on the shafts 9 or 21, they are held securely in their position without the need for additional brackets.

The drives are arranged offset in the housing 2 so that the space inside the housing 2 is well utilized

,&rdquor; and the possibility exists to use a component 50 for .'.5

Accommodation of electrical circuits approximately in the middle between the motors 47, 147.

When lowering the head or foot section of the slatted frame

the drive unit with spindles 48 or 148 20

Only small forces can be transmitted, since the lowering of the moving parts are supported by the downward force of gravity. In this case, the direction of rotation of the spindle 48 or 148 is opposite to the direction of rotation when pivoting upwards.

In Fig. 4, the partially broken side view shows how the thrust pieces 42, 142 are supported on the shaft 9 and 21 respectively. At the same time, the compact and simple design of the housing 2

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illustrated.

The internal structure of the housing 2 is shown in Fig. 5. The housing has a total of eight guide rails 37, 37, 38, 38, 39, 39» 40, 40 inside. The thrust pieces 41, 42 are inserted into these parallel guides and can be moved by the guides.

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The guides are made up of two angle rails with their free outer ends pointing away from each other. If necessary, a reinforcement can be placed between two adjacent guides. part (not shown) to reinforce the housing can be inserted.

In Fig. 5, the hole in the head part 32 of the nut 49 for receiving the bolt 31, the inner recess of the nut 49 for receiving the lever arm 30 and the hole in the receiving flange 44 for receiving the pin 43 are shown in dashed lines.

As can be seen from Fig. 4, the channel-shaped housing is covered with a cap 135. A corresponding cap is pushed onto the other end of the housing, but is not shown in Fig. 4 for the sake of simplicity.

Fig. 6 shows an improved spindle drive which has a clearance. The spindle 248 extends through the flange 245 of the gear box into its housing and is connected there to the drive shaft (not shown). The spindle 248 can be moved along this spindle. A nut 249 is guided, which has an H-shaped outer limit and receives the legs of a U-shaped bracket 252 there. When the spindle rotates, the nut 249 cannot rotate, but only along the spindle axis and thus also along of the two legs of the U-shaped bracket 252. The spindle is closed at its free end by a stop screw 273, so that the nut 249 can only move between this stop screw 273 on one side and the crosspiece of the U-shaped bracket

g ₅ 252 on the other side can move back and forth. | On the ends of the spindle there are spring packs 274 | and 275, which provide a harder stop in both directions

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! and thereby protect the gearbox from overloads.

The two legs of the U-shaped bracket 252 are connected in an articulated manner by means of a bolt 31 to the lever arm 30 already mentioned, which is fastened to the shaft 9. A rotation of the spindle thus causes an axial displacement of the nut 249 and, after it has struck the crosspiece of the U-shaped bracket 252, a pivoting of the lever arm 30 and thus of the shaft 9.

The shaft 9 is surrounded on both sides of the U-shaped bracket 252 by clips ¹ 260, 270, which clamp the shaft by more

than half a circumference and thus a 15

prevent accidental release. These clips are made of plastic and, when they are placed on the shaft, give way elastically so that the shaft snaps shut. This is done by a corresponding

outward-facing inlet piece 261 and a corresponding 20

corresponding bevel on the opposite side of the

Opening is made easier. The clips have fork-shaped holding parts 262, 272 in connection with the partially opened sleeves 260, 270, which are placed on the free ends of the

the housing protruding thrust pieces 242, 241 on-25

and are inseparably linked to them. The

The design of the clips ¹ and their attachment to the thrust pieces is shown in Fig. 7 in conjunction with Fig. 6 \ clearly.

30

■* The fill

Claims (1)

Dipl.-lng. W- tjarfalkf :.·".·.". ·*
Dipl.-lng. H:-U.'Lip-perf'*' * * * *' ^: Patent Attorneys 1 Frankenforster Street 137
Bergisch Gladbach 1 &Ngr;&Igr;&Kgr;&Ogr; Drive technology Lindlar 25 August 1987 D/Sw Expectations 1. Drive for slatted frames as parts of couches or beds, with a pivoting head part, middle part and pivoting foot part, whereby the head part, which can pivot about an axis in the longitudinal beams, can be pivoted by a bracket which slides on its side bars and is connected in a rotationally fixed manner to a shaft mounted in the longitudinal beams, whereby the foot part is furthermore connected in a rotationally fixed manner to a second shaft mounted in the longitudinal beams by an articulated connection and whereby each of the two shafts carries a lever arm which projects upwards in the position of use of the slatted frame and is connected in a rotationally fixed manner to this and whereby finally the two lever arms are each articulated to an independent drive, characterized in that the two drives are located in a common housing 2 which is arranged between the two shafts (9, 21) and below the fixed middle part of the slatted frame (1) and is carried by them, whereby each drive has a lever arm (30) which is connected to the lever arm (30) or 130) of the associated shaft (9 or 21) by means of easily removable bolts (31 or 131), a nut (49 or 149) of a spindle drive (48, 49 or 148, 149) and an electric motor (44, 45, 47 or 144, 145, 147), and that furthermore each of the two parallel, slidably guided thrust pieces (41, 42 or 141, 142) are articulated to both motors by means of two pins (43, 43 or 143, 143) projecting radially from the receiving flange (44 or 144) for the spindle (48 or 148), which are designed at their other ends protruding from the front of the housing to receive the shafts (9 or 21) and to support them. 2. Drive according to claim 1, characterized indicates that the thrust pieces (41, 42 or 141, 142) are approximately semicircular at their ends protruding from the housing. recesses for accommodating the shafts (9 or 15 21). 3. Drive according to claim 1, characterized in that the fork-shaped part (262) of a clip ¹ (260) made of plastic is fastened to the projecting end of each thrust piece, which clip 1 (260) engages around the shaft (9) to be received over more than half its circumference after snapping into its wedge-shaped widened opening. 4. Drive according to claim 1 to 3, characterized in that the motors (44, 45, 47 or 144(145, 147) are designed as geared motors with a gear (45 or 146). 5. Drive according to claim 1 to 4, characterized in that the housing (2) for the drives is designed as a one-piece channel open on both sides with an approximately rectangular cross-section is trained.
35 6. Drive according to claim 1 to" 5» characterized MIl $4 IIII characterized in that on the plate I (33) of the bottom side and the opposite plate (34) of the top of the housing (2) parallel guides (37* 38, 39 _S 4Ö) are provided for receiving g of the thrust pieces (41, 42 or 141» 142) are formed . 7. Drive according to claim 6, characterized in that the guides (37, 39 f _n/S and 38, 40) lie opposite one another at the same distance from the side walls (36, 35) of the housing (2). \ &dgr;* Drive according to claim 6 and 7, characterized | ,_ characterized in that the guides (37, f &khgr; 38, 39, 40) are formed by two angle rails < whose angled free ends "| point away from each other. J 9. Drive according to claim 1 to 8, characterized in that &iacgr; · marked that the in the I The thrust pieces (41, 42 or 141, 142) in the housing (2) are arranged offset ^and guided on guides (37» 38, 39, 40). I 10. Drive according to claim 1 to 9, characterized % characterized in that in the housing (2) a | component (50) for accommodating electrical \ circuits for power supply and for control j the drive motors are provided. - 11. Drive according to claims 1 to 10, characterized in that limit switches connected to the control part of the drives are provided to limit the movement of the head part and the foot part of the slatted frame (1) in the upward and downward directions. 12* Drive according to claims 1 to 11, characterized in that the spindle drive comprises a spindle (248) connected in a rotationally fixed manner to the gear of the motor, a nut (249) screwed onto this and a U-shaped bracket (252), the legs of which run parallel to the spindle axis and can be connected at their free ends by means of a bolt (31) in an articulated manner to the free end of the lever arm (30) sitting on the shaft (9). are; while the crosspiece ⁰ of the bracket (252) has a hole for the spindle to pass through* that furthermore a stop screw (273) is placed on the free end of the spindle (248), which stops the axial movement of the nut (249) relative to the bracket limited to one side, while its axial movement to the other side is limited by the crossbar of the bracket, and that finally a rotation of the nut (249) relative to the bracket is prevented by stops which only 2ö Allow axial displacement of the nut relative to the bracket. 13. Drive according to claim 12, characterized by spring assemblies (274, 275) arranged on the spindle at its end. |