EP2286781A2 - Articulation for bed - Google Patents

Abstract

The patient bed (1) has a height-adjustable base supporting a mattress frame via a rotary mechanism, allowing rotation of the mattress frame about a vertical axis. The rotary mechanism has a circular support ring in which an intermediate frame is supported, the mattress frame attached to the intermediate frame.

Description

From practice a rotary bed is known in which a reclining frame is arranged on a height-adjustable pedestal. The lying frame is connected to the base via a rotary hinge.

The lying frame is essentially divided into three sections, a back section, a central section and a leg section. The leg portion is divided into a proximal and a distal subsection.

With the help of electromotive drive means of the reclining frame can be transferred from a more or less stretched lying or bed position in a chair position. For this purpose, the lying frame is brought by means of the rotary hinge, relative to the base of the lying position by 90 ° in a transverse position. The back portion of the reclining frame is erected while the distal subsection of the leg portion is lowered downward. The central portion and the proximal leg subsection form a seating surface for the patient.

The distance that the upper edge of the seat, possibly increased by the thickness of the mattress, from the ground, corresponds to the anatomical human conditions. That is, the distance must not be greater than the distance from the popliteal fossa to the floor, otherwise a patient sitting on the bed would have no ground contact with the feet. Getting up would be difficult.

In the known bed, the rotary hinge consists of an arranged on the head of the base circular ring of an L-shaped angle section. Below the circular ring runs a strut cross, which contains a vertically aligned bearing bush at the interface of the struts. In this bearing bush is rotatably mounted a pivot pin which is connected to a frame of the rotary hinge. The frame of the rotary hinge consists of spars, which are arranged along the edges of a square whose edge length corresponds to the diameter of the circular ring. In the middle of the longitudinal bars rollers are mounted, which run on the top of the annulus.

The spars of the intermediate portion of the reclining frame are rigidly connected to the square frame of the rotary hinge via stand.

When loading the Liegeahmens take over the rollers, the compressive forces, while the tensile forces on the journal and the socket are introduced into the base.

The height of the rotary hinge is relatively high, which forces the base rests directly on the floor without free space of light.

The base can not be moved further for two reasons: The struts forming the base have certain minimum cross-sections so that they are able to absorb the forces occurring when the bed is loaded without deformation. After all, the bed must be sized for a patient weight of about 180 kg. The other constraint that prevents further collapse of the pedestal is the forces on the drive device. The further the pedestal has moved together, the shorter the lever arms on the individual crank levers, by means of which the base is stretched by the drive means.

A further increase in the height in the known construction results from the fact that between the reclining frame and the frame of the rotary hinge, a distance must be provided, in which the drive means for the leg portion and the back portion are to be accommodated. The required drives are located above the frame of the rotary hinge, since its interior is also filled with a cross strut because of the mounting of the axle journal.

All these circumstances together prevent that can be placed on feet in the known rotary bed of the base, but must rest directly with the lower bars or struts on the floor. However, this is ergonomically unfavorable, because the nursing staff from the bed frame must comply with a distance corresponding to the foot size. The nursing staff can at best put the feet right up to the pedestal, creating a considerable distance between the lower leg of the nursing staff and the edge of the reclining frame. The nursing staff can not support themselves with the lower leg or knee against the edge of the bed during the care of the patient in bed, so that ergonomically unfavorable conditions come about.

Based on this, it is an object of the invention to provide a bed in which the base can be raised so that below the base remains a space that allows the nursing staff to approach closer to the bed.

This object is achieved with the bed with the features of claims 1, 10, 19, 37 and 48.

In the solution according to the invention according to claim 1, a rotary hinge is provided which has a support ring, within which the turntable is located, on which the reclining frame is attached directly or indirectly. The fifth wheel is connected to the pedestal exclusively via the support ring, so that no central journal is required. As a result, the area within the fifth wheel is free. This space allows the accommodation of parts of the drive means for the back and the foot portion of the reclining frame, which benefits the height.

The turntable of the rotary hinge is located within the support ring, whereby the vertical extent of the rotary hinge is additionally reduced, compared with a sandwich construction, in which the turntable is arranged exclusively above the support ring, as is the case in the prior art.

Preferably, the turntable consists of two longitudinally parallel to each other extending spars, which are rigidly connected to each other via cross struts. The cross struts are bolted together, whereby at the same time a width adjustment of the longitudinal bars is possible. As a result, manufacturing tolerances can be compensated easily.

In addition, the screwing of the struts together allows easy mounting of the fifth wheel within the support ring.

Preferably, the support ring has a U-shaped profile, so that the bearing means which connect the turntable to the support ring, can engage in the U-profile. This too can contribute to a reduction in the height. Otherwise, the bearing means would have a disc-shaped support ring attack on both sides of the support ring in order to transfer without axial journals the upward transverse forces, ie the tensile forces on the ring can.

The bearing means preferably consist of a respective axis connected to the ends of the respective spar and a roller running thereon. With the help of the roller, the axial forces, ie both the downward and the upward forces can be transmitted. Such upward forces arise, for example, when the foot of the reclining frame is more heavily loaded than the head or when the reclining frame is in the chair position, since then the seat for anatomical reasons is mainly in front of the vertical axis of rotation of the rotary hinge.

Thus, the fifth wheel easily runs within the support ring, advantageously radially supporting rollers are present on the support ring. They serve to center the fifth wheel in the support ring, what the usually cylindrical support rollers that take over the axial forces, not able to afford.

According to a fundamentally different embodiment of the rotary hinge, a circular arc is used as a supporting ring whose arc length is smaller than 360 °. In this rotary hinge an axle journal is additionally provided, which is, however, immediately adjacent to one side of the head of the base. As a result, in turn, the interior remains largely free, so that here space is created to accommodate the drive means for the bed frame. Moreover, the structure can be designed substantially the same as in the above-described embodiment of the invention.

The advantage of the second alternative is that in the chair position, which is then adjacent to the head end Side of the reclining frame is not moved so much towards the head end. It remains substantially at the height of the axis of rotation, since the axis of rotation of the respective side of the reclining frame is immediately adjacent.

In the former embodiment, on the other hand, the side of the reclining frame moves closer to the head end by the distance the side from the vertical axis of rotation, thus making the clearance between the reclining frame and the head end of the bed considerably smaller in the chair position becomes.

In addition, the second alternative, with the support ring not closed, allows the use of over-width sling frames.

The lying frame is, as already mentioned several times, divided into several sections, which are movable relative to the central portion. This can result in dangerous crushing and shearing in combination with other rigid parts of the bed. Even if they are allowed by the relevant standard and safety regulations, since they have hitherto been regarded as unavoidable, it is advantageous if a new design eliminates these crushing and shearing points which have hitherto been regarded as unavoidable. This is particularly advantageous even if this does not adversely affect the height.

According to a further aspect of the invention, an intermediate frame is used between the lying frame and the rotary hinge, which is significantly narrower than the width of the reclining frame. This inevitably enforces a distance corresponding to the height of the spars of the intermediate frame between the bed frame and the top of the base. This distance is due to strength requirements Spars and thus due to their dimensions so large that a risk to persons is excluded.

In addition, parts of the driving means for the back portion and the foot portion of the reclining frame can be accommodated in the clearance space of the intermediate frame, viewed in the horizontal direction.

Thus, it is possible to accommodate in the area between the two longitudinal beams of the intermediate frame, a longitudinal guide device in which a carriage is guided. On the carriage engages on the one hand a drive means and on the other hand a kind of connecting rod, which transmits the movements of the carriage to the foot portion of the reclining frame. As a result, compared to the prior art, enormous savings in height. The drive device in such known beds usually consists of an electric motor with a screw drive. Would this screw drive as in the prior art attack directly on the foot section, he would have to perform a significant pivotal movement. Accordingly large in the prior art, the distance between the upper edge of the base, or the hinge and the bottom of the reclining frame must be selected. The solution according to the invention avoids the pivotal movement of the drive device and reduces to the connecting rod, which takes up much less space in the vertical direction. In addition, the space within which the pivoting movement takes place, be moved into areas where there is sufficient space available without increasing the vertical height.

The lying in several mutually movable sections divided lying frame forces it to transmit only over the intermediate section, the total forces emanating from the weight of the patient to the base. Thus, the specific one Load in the area of the intermediate section extremely high. In this area, the bed construction must be stable and stiff so as to largely avoid any elastic deformation which, under certain circumstances, could cause parts of the bed to collide with each other during the rotational movement.

The stability can be substantially increased if the bars of the intermediate frame are braced against each other via at least two rigid struts. These two struts are located in vertically spaced planes approximately at that height, with respect to the longitudinal extent of the bed, at which the spars of the intermediate portion of the bed frame are connected to the intermediate frame. This creates a kind of box construction, which is very stiff with respect to the forces occurring.

Again, it is possible in turn, readily to use for moving the foot section a construction in which, as explained above, with the aid of the drive means a connecting rod is driven.

Due to the low height of the rotary hinge, or the distance of the underside of the reclining frame from the head of the base can not be used to move the back portion known from the prior art arrangement with shaft and levers. The wave could not be driven anymore. In the construction according to the invention therefore a drive device is used, which acts directly on the rear portion. The back portion and the force axis along which the drive means acts against the rear portion form an acute angle, the drive means being supported in the intermediate frame or on the reclining frame itself. As a result, in the hinges, which are the longitudinal beams of the sections involved with each other connect, induces considerable tensile forces. The tensile forces generated there are significantly greater than the forces that occur when, as in the prior art, the back part is lifted by levers which are fastened to a separately mounted shaft. There are therefore much firmer hinges required to connect the longitudinal struts of the sections of the bed together.

In the solution according to the invention tabs are provided which extend in the longitudinal direction of the respective spar, and which form the hinge straps. Between at least two hinges forming a tab at least one circular disk-shaped spacer member is arranged, which is preferably larger in diameter than the vertical extent of the respective longitudinal spar, so that in each pivot position of the spars zueinader squeezing and clamping points are effectively avoided.

In the simplest case, the tabs can be integral part of the spars. The spars are preferably square tubes which are provided at the ends with an approximately rectangular recess or notch. This results in extension of the full cross section of the rooms tabs with U-shaped cross-sectional profile. The back of the U-shaped profile represents the extension of the outer wall of the spar, while the lateral strips or legs of the U-shaped cross-sectional profile of wall portions of the original pipe cross section are formed. This results in tabs that are very rigid in the direction perpendicular to the back of the tab relative to the rest of the spar.

Moreover, further developments of the invention are the subject of dependent claims. In this case, such feature combinations are to be regarded as claimed, to which no express embodiment is directed.

Fig. 1

ein erfindungsgemäßes Drehbett in der Liegestellung,

Fig. 2

das Drehbett nach Figur 1 in der Sessel- oder Sitzstellung,

Fig. 3

den Bettrahmen für das Bett nach Figur 1 in einer Seitenansicht,

Fig. 4

das Gestell nach Figur 3 in einer teilweisen Explosionsdarstellung,

Fig. 5

den oberen Teil des Sockels des Gestells nach Figur 4,

Fig. 6

den Drehschemel des Drehscharniers aus Figur 4 in einer Ansicht von unten,

Fig. 7

den Drehschemel nach Figur 6, in einer Ansicht von oben,

Fig. 8

den Zwischenrahmen des Gestells, in einer perspektivischen Darstellung,

Fig. 9

einen vergrößerten Ausschnitt aus der Darstellung von Figur 8 unter Veranschaulichung der Lagerung des Schubrohrs für den Antrieb des Unterschenkelabschnitts,

Fig. 10

einen Ausschnitt aus dem Gestell nach Figur 3 unter Veranschaulichung des Antriebs des Rückenabschnitts,

Fig. 11

eines der Scharniere des Liegerahmens, in einer perspektivischen Explosionsdarstellung, und

Fig. 12

ein weiteres Ausführungsbeispiel des oberen Rahmens in Verbindung mit einem Drehscharnier, bei dem der Ring lediglich einen Bruchteil eines Vollkreises lang ist.

In the drawings, embodiments of the subject matter of the invention are shown. Show it:

Fig. 1

an inventive rotary bed in the lying position,

Fig. 2

the rotary bed after FIG. 1 in the chair or sitting position,

Fig. 3

the bed frame for the bed FIG. 1 in a side view,

Fig. 4

the frame after FIG. 3 in a partially exploded view,

Fig. 5

the upper part of the base of the frame FIG. 4 .

Fig. 6

the turntable of the rotary hinge FIG. 4 in a view from below,

Fig. 7

after the fifth wheel FIG. 6 in a view from above,

Fig. 8

the intermediate frame of the frame, in a perspective view,

Fig. 9

an enlarged section of the representation of FIG. 8 illustrating the mounting of the torque tube for driving the lower leg section,

Fig. 10

a section of the frame after FIG. 3 under Illustration of the drive of the back section,

Fig. 11

one of the hinges of the reclining frame, in a perspective exploded view, and

Fig. 12

a further embodiment of the upper frame in conjunction with a rotary hinge, wherein the ring is only a fraction of a full circle long.

FIG. 1 shows in a perspective view a nursing bed 1 in the lying position, while FIG. 2 the nursing bed 1 in the seat or chair position reproduces.

The nursing bed 1 has a bed border 2 with a head part 3, a foot part and side walls 5 and 6. The viewer facing side wall 5 is located in the reclining position as illustrated at a distance from the ground, so there is a gap between the lower edge of the side wall 5 and the bottom, which allows the nursing staff to deliver the toes under the bed. The side wall 5 is movably mounted and arrives in the chair position of the nursing bed 1 in a downwardly shifted position, like this FIG. 2 lets recognize. The special storage of the side wall 5 is for example in detail in the DE 199 12 937 A 1 explained.

Within the Bettumrandung 2 is a bed frame 7, as it Figures 3 and 4 reveal. To the bed frame 7 includes a height-adjustable base 8, on the upper side of a rotary hinge 9 is fixed with a vertical axis of rotation, an intermediate frame 10, and a reclining frame 11, on which a mattress 12 is located. The reclining frame 11 is rectangular in plan view.

The hinge 9 is sunk by the majority in the base 8, which is why it only in FIG. 4 can be seen in the side view. By sinking the rotary hinge 9 in the base 8 is saved considerably in height.

The reclining frame is divided into a central portion 13 which is fixedly connected to the intermediate frame 11, a back portion 14 which is hinged to the central portion 13, a thigh portion 15 which is also hinged to the central portion 13, and a lower leg portion 16. The lower leg portion 16 is hinged to the remote from the central portion 13 end of the thigh portion 15. The hinge axes about which the sections 14, 15, 16 are movable relative to the central section 13 are horizontal. Finally, to the lying frame 12 is still a foot section 17 which is rigidly connected directly to the base 8.

The central portion 13 of the reclining frame 12 has two mutually parallel longitudinal beams 18 and 19, which in FIG. 8 can be seen. Each of these spars 18, 19 terminates at hinged hinges for a hinge, which is described below with reference to FIG FIG. 11 is explained.

Each spar 18, 19 carries inwardly facing pins 21, are pushed on the rubber molds that absorb spring rods in a known manner. Instead of spring rods can serve as a support and a plate, as is common in hospital beds.

The back portion 14 is bounded by a spar 22 and another parallel spar, which, because of the representation in FIG. 3 can not be seen. The further spar is connected to the longitudinal spar 18 while the visible Holm 22 is hinged to the spar 19. The two bars 22 of the back portion 14 are connected by a not visible in the figure transverse spar at the upper end at 23 together. In addition, on the underside of the two bars 22, a further transverse strut 24 runs.

Also, the thigh section 15 is limited by two longitudinal beams, of which only one longitudinal spar 25 can be seen. The other longitudinal spar is covered by the longitudinal spar 25. The two longitudinal beams 25 are connected by a cross strut 26. The cross strut 26 extends approximately at the center of each longitudinal spar 25 at the bottom.

Finally, the lower leg portion 16 is bounded by two longitudinal beams, of which in turn only the longitudinal beam 27 can be seen in the figure. The two longitudinal beams 27 are connected together at the lower end at 28 via a transverse strut. In addition to the transverse strut 28, the two longitudinal beams 27 are connected by a strut 29, are fastened to the two mutually parallel guide rails 31, which extend to the lower transverse frame 28. As shown, they extend at an angle to the longitudinal beam 27 in such a way that they converge in the direction of the foot end. The distance between the two guide rails 31 is significantly smaller than the distance between the two longitudinal beams 27. Opposite these, the guide rails 31 are offset approximately 20 cm inwards.

The foot section 17 consists of bars 32, which are elevated on the base 8 via struts 33.

All longitudinal bars 22, 25, and 27 bear towards the center of the bed pointing pins, according to the pin 21 to this rubber molded parts with the longitudinal bars 22, 25, 27 to connect, between which extend spring rods in a known manner.

The height-adjustable base 8 includes an upper frame 34 and a frame 35 which are connected to each other via a total of five toggle lever pairs 36 and 37. The toggle lever pairs 36, 37 are each located on one longitudinal side of the base 8, so that the corresponding toggle lever pairs 36, 37 on the other longitudinal side in FIG. 4 are not visible in the side view.

The toggle lever pair 36, 37 is composed of an upper toggle lever 38 and a lower toggle lever 39. Each toggle lever 38, 39 is pivotally connected via a hinge 41 with a horizontal axis on the relevant bed side with the upper and lower frame 34, 35. All axes of the hinges 41 are parallel to each other. The hinges 41 are coaxial with their axes to the axes of the hinges 41 of the unrecognizable toggle levers 38, 39.

FIG. 5 In detail, the design of the upper frame 34. According to this, two longitudinal bars 42 and 43, which are rigidly connected to each other at the ends by transverse struts 44 and 45, belong to it. Another cross strut 46 is inserted so that, like the FIG. 5 reveals a square hole results, with obliquely extending support struts 47 are welded in the corners. The support struts 47 serve as a support for a ring 48 of the rotary hinge 9. The run or support ring 48 rests on the support struts 47 and is firmly connected thereto. With its outer surface it lies against the inside of the two longitudinal bars 42, 43 and the inside of the two transverse struts 45 and 46.

The two longitudinal bars 42 and 43 contain the holes for the upper hinges 41 via which the upper toggle levers 38 are pivotally connected to the upper frame 34.

The lower frame 35 basically has a similar shape to the upper frame 34, i. he is composed of two longitudinally extending beams 49, which are connected to each other via unrecognizable cross braces. The transverse struts of the lower frame 35 are located below the transverse struts 44 and 45 of the upper frame 34. The lower longitudinal beams 49, which are parallel to the bed longitudinal direction are extended over the longitudinal extent of the upper frame 34 as shown and end provided with Aufstellfüßen 51. With the help of the four, located at the corners of a rectangle feet 51 is the base 8 and thus the entire bed frame 7 on the floor. By this form of Aufständerns a space of about 12 cm is created between the lower frame 35 and the bottom, so that nursing staff can put the toes under the base 8. The nursing staff can thereby take an ergonomic favorable attitude by it can approach so close to the nursing bed 1, that it can be supported in addition to the lower leg of the bed frame 2. As a result, in a forward bent over attitude, the back muscles and thus the spine is spared.

The two toggle lever pairs 36, 37 on each side of the base 8 are each coupled to one another by an associated coupling strut 52, 53. Each coupling strut 52, 53 is hingedly connected to the knee joint 54 of each toggle lever pair 36, 37 as shown. Finally, the two coupling struts 52 and 53 are yoke-like connected to each other via a transverse strut 55. At the cross point 55 is a tab 56 as an abutment for a drive motor 57th

Finally connects on each side of the base 8, a sloping coupling strut 58, the upper knee lever 38 of the toggle lever pair 37 with the lower toggle lever 39 of the toggle lever pair 36th

The kinematics of the base 8 and its dimensioning is detailed in the DE 198 54 136 A1 explained.

The drive motor 57 is supported at its end remote from the tab 56 on a cross member, which connects the two longitudinal members 49 with each other approximately below the cross member 44.

The drive motor 57 is a commercially available spindle motor. With the aid of a permanently excited motor 59, a not recognizable worm gear is driven. The worm wheel is rotatably connected to a screw spindle. On the screw a threaded nut on the train and pressure-resistant lifting tube 61 is mounted, which runs coaxially in a guide tube 62. The free end of the lifting tube 61 carries a fork head, which is hinged to the tab 56. Another clevis is located at the opposite end of the motor housing, where the motor is started with the corresponding direction of rotation.

By starting the engine with the corresponding direction of rotation, the lifting tube 61 is either withdrawn into the guide tube 62 or advanced out of the guide tube. By advancing the lifting tube 61, the cross member 55 moves toward the head of the bed. As a result, the lower toggle lever 39 of each of the toggle lever pairs 36 and 37 erected, since all these are kinematically connected to each other via the horizontal coupling strut 52, 53 and the cross member 55. The erection movement of the lower toggle lever 39 is transmitted via the oblique coupling struts 58 to the upper toggle lever 38 of the knee lever pairs 37 located at the foot end. As a result, the toggle levers 38 of the rear toggle lever pairs 37 also raise themselves. Finally, this movement is also transmitted to the front toggle lever pair 36 located at the head end.

Due to the kinematics, it is ensured that the upper frame 34 always remains parallel to the lower frame 35. The vertical movement of the upper frame 34 does not result in any appreciable displacement of the upper frame 34 in the longitudinal direction of the nursing bed 1 within the range of stroke for which the pedestal 8 is constructed. The occurring longitudinal movement is less than 5 mm.

The rotary hinge 9 includes the aforementioned ring 48 and a in the FIGS. 6 and 7 from the lower or upper side shown turntable 64. The ring 48 which is fixed in the upper frame 34 has the at A in FIG. 5 shown cross-sectional profile. The cross-sectional profile is U-shaped and is composed of a lower horizontally extending leg 65, an upper leg 66, which runs parallel to the lower leg 65, and a right-angled back 67 together. The back 67 forms a section of a straight cylindrical surface.

The ring 48 is self-contained, whereby the lower leg 65 is a continuous horizontal annular track.

The fifth wheel 64 comprises two longitudinal bars 68 and 69. The two longitudinal bars 68 and 69 are parallel to each other. From the longitudinal spar 68 cantilevered flat struts 71 and 72, which, as shown in the assembled state at a distance from the opposite longitudinal spar 69 ends. The longitudinal beam 69 is provided with corresponding flat bars 73 and 74, which also terminate at a distance from the longitudinal spar 68. The struts 71 ... 74 are attached to the spars 68 and 69, that they, when the spars 69 and 68 are superimposed The strut 72 corresponds to the strut 73 and the strut 71 of the strut 74. The contact surface between the struts 71 and 73 has the same distance from the adjacent end of the strut 68 as the contact surface between the struts 72 and 74. Due to this arrangement, the longitudinal spars 68 and 69 ideally form the edges of a square that fits into the ring 68 with a small clearance.

The struts 71 ... 74 are screwed together by a total of four screws 75 .... 78. They lead through corresponding holes in the struts 71 ... 74. For the purpose of adjustment to the diameter of the ring 48, a part of these openings are slots. Thus, the bore for the screw 75 in the strut 73 is a cylindrical bore, while the corresponding openings of the strut 71 is a slot. Conversely, the opening for the screw 76 is a cylindrical bore and thus corresponding opening in the strut 73 is a slot. Analogously, the same arrangement is made for the struts 72 and 74.

At the ends of the longitudinal beams 68 and 69, as shown, stub axles 79, 82 and 83 are mounted. The stub axles 79 .... 83 lie in one plane and their axes intersect in pairs at 90 °. The axis of the journal 79 is coaxial with the axis of the journal 82, while the axis of the journal 81 is also coaxial with the axis of the journal 83.

On each journal 79 ... 83 sits a cylindrical roller 84, which fits with the assembled fifth wheel 64 with little play between the legs 65 and 66 of the ring 48. In that regard, the rollers 84 serve as support rollers that transmit the vertical force between the ring 78 and the fifth wheel 74. The support rollers 84 are radial on the journal 79 freely movable to the outside. Displacement radially inward beyond the position shown is prevented by a abutment shoulder formed on each of the stub axles 59 ... 83.

The radial guide within the ring 48 provide four disc-shaped rollers 85. The rollers 85 run in the mounted state of the fifth wheel 64, depending on the radial load against the inwardly facing cylindrical surface of the back 67 at.

The axes of rotation of the guide rollers 85 are axially parallel to each other and they are ideally on the corners of a square, the diagonal length to the diameter of the guide rollers 85 is smaller than the inner diameter of the ring 48 measured on the inside of the back 67th

For connecting and holding the guide rollers 85 a total of four bearing blocks 86, 87, 88 and 89 are provided. The bearing blocks are each slotted on the side of the support roller 85, so that two cantilevered legs arise, between which the respective guide roller 85 is rotatable. The bearing block 87 is mounted directly on the strut 72 and the bearing block 89 directly on the strut 73. Both bearing blocks 87 and 89 are located in the middle between the longitudinal beams 68 and 69th

The two bearing blocks 86 and 88 are mounted on the outside of the two spars 68 and 69 centrally between the support rollers 84.

The guide rollers 85 rotate on axles in the form of spacer bushings, which are inserted between the forked ends of the bearing blocks 85 ... 89. With the help of screws 91 they are secured in the bearing blocks 85 ... 89. Only the seated in the bearing block 89 guide roller 85 is for Purpose of the radial adjustment of the effective diameter of all four guide rollers 85 radially adjustable, which is why only here the opening for the screw 91 is a slot 92.

On the outer sides of the two longitudinal beams 68 and 69, two angle sections 93 and 94 are attached. One of the two legs of the legs 95, is also welded to the outside, while the other leg 96 with the top of the respective longitudinal spar 68, 69 is flush. The legs 96 serve as a mounting flange for the intermediate frame 10th

The bearing blocks 86 and 88 are welded to the outside of the respective leg 95.

In order to couple the fifth wheel 64 with its associated drive motor 97, two coupling tabs 98 and 99 are provided on the underside of the fifth wheel 64. The tab 98 is seated on a boom 100 which is secured in the inner corner between the strut 72 and the longitudinal strut 78 and protruding therefrom. The other tab 99 is seated on a corner strut 101 which, as shown, extends from the longitudinal spar 69 to the connecting strut 74. By appropriate spacers 102 ( FIG. 4 ), the two tabs 98 and 99 offset so far down that the lifting tube 103 and the guide tube 104 of the drive motor 97 touches at any point.

The structure of the drive motor 97 is the same as that of the drive motor 57, which is why a recent explanation is unnecessary.

The reaction torque of the drive motor 97 is introduced when turning the fifth wheel in an abutment 105 which is provided on the cross member 46 of the upper frame 34, and is thus located between the cross member 46 and the cross member 44 so outside of the rotary hinge 9.

Depending on which direction of rotation is desired, the lifting tube 103 is selectively coupled to the tab 98 or tab 99.

The structure of the intermediate frame 10 results from FIG. 8 , It is composed of two longitudinal beams 106 and 107, which are connected to each other via a head-side cross member 108. In addition, the two longitudinal struts 106 and 107 at the height of the longitudinal members 18, 19 of the central portion 13 of the reclining frame over 11 a total of 4 struts 109, 110, 111 and 112 connected to each other. This results in the area of the struts 109 ... 112 a kind of open box section, which is able to absorb without torsion and widening of the distance between the longitudinal beams 106 and 107 forces resulting from cantilevers 113, 114, 115 and 116 , When the reclining frame 11 is loaded with a patient.

The two lower struts 109 and 112 act as compression struts, which is why they, as out of FIG. 9 can be seen, consist of a square tube. The upper struts 111 and 110 are loaded only on train, which is why it is sufficient here to use a flat profile, as is also the case of the representation of FIG. 9 results.

The cantilevers 113 ... 116 are welded to the outside of the two longitudinal beams 116 and 107 projecting outwardly, as shown, so that the two arms 113, 115 are aligned with each other as well as the two arms 114 and 116. The longitudinal axes of these pairs of arms 113th ... 116 are parallel to each other.

Their length is about 20 cm and they wear on the free projecting ends with the interposition of a spacer 117 rigid and immovable placed the spars 18 and 19. In this respect, the mechanically strong connection between the reclining frame 11 and the intermediate frame 10, the boom 113 ... 116.

To drive the thigh section 15 and the lower leg section 16, a shaft 118 mounted between the two longitudinal bars 106 and 107 is provided. To this shaft 118 rigidly parallel arms 119 and 120 are fixed, which are connected at their free end by a cylindrical strut 121 together. The strut 121 projects beyond the arms 120 and 119. The protruding ends serve as a journal for two cylindrical rollers 122, only one of which is shown. The two rollers 122 run in the guide rails 31 and support at the relevant point the lower leg portion 27th

To rotate the shaft 118 and so lift the levers 119, 120 sits on the shaft 118 rotatably another pair of levers 123, which serve as an articulation point for a connecting rod 131. The connecting rod 131 is connected to a lift tube 132 of a drive motor 133. The structure of the drive motor 133 corresponds to the structure of the drive motor 57. The longitudinal axis of the structure connecting rod 131 and lifting tube 132 extends in plan view, parallel to the longitudinal spar 106 and adjacent to the longitudinal spar 106 on the inside. The motor 133 is supported on a tab 134, which is stiffened via an insert 135 relative to the longitudinal spar 106. The connection between the connecting rod 131 and the lifting tube 132 is articulated. In order to avoid buckling, the lifting tube 132, guided in the region of the coupling point with the connecting rod 131 in a special way.

On the two lower struts 109 and 112 are under Interposed layer of a spacer element 136 two short U-shaped guide rails 137 and 138 attached. The two U-shaped guide rails 137 and 138 open towards each other and are at the same height.

At the connecting rod 131, a clevis 139 is attached, which engages over the free end of the lifting tube 137 from the outside. By aligned holes in the clevis 139 and the end of the lift tube 132 performs a pivot pin 140 through, on the outside of the fork head 139 each have two rollers 141 are rotatably mounted. The rollers 141 run in the guide rails 137 and 138. A buckling of the joint between the clevis 139 and the lifting tube 132 is thus effectively avoided.

In this way, it becomes possible to couple the motor 133 with the shaft 118, wherein the vertical space is limited in this area to about 5 cm.

The attachment of the intermediate frame 10 on the turntable 64 is done by means of two angle flanges 143, of which in FIG. 8 because of the representation only one can be seen. The angle flanges 142 are welded to the outside of the longitudinal beams 106 and 107, while their other leg 143 with the underside of the respective longitudinal spar 106, 107 is flush. In the legs 143 a total of four slots 144 are included, which are aligned with slots 145 in the legs 96 of the fifth wheel 64. The elongated holes 145 are directed outwards, ie their longitudinal axis is perpendicular to the adjacent longitudinal spar 68, 69, while the slots 144 are parallel to the longitudinal spar pair 106, 107. In this way, the intermediate frame 10 can be adjusted on the turntable 64 in the longitudinal direction of the bed. At the same time in each possible adjustment position of the two longitudinal beams 68 and 69 of the fifth wheel 64 to each other an attachment of the intermediate frame 10 possible.

Finally, at the two cross struts 109 and 110, a motor bearing 146 is present, which is attached to a downwardly projecting pillar 147. The pillar 147 is attached with a flat side to the two struts 109 and 110. It protrudes in the assembled state in the space of the fifth wheel 64 of the longitudinal struts 68 and 69 and the connecting struts 71 ... 74 is limited. This space also accommodates the downwardly protruding parts of the drive motor 133. Apart from that, the vertical extent of the intermediate frame 10 is limited to about 5 cm plus the ceiling of the struts 110 and 111. These have a material thickness of about 5 mm.

The assembly of the rotary hinge 9 is as follows: After the base 8 is fully assembled with the inserted ring 48, the bearing blocks 86 ... 89 equipped with the guide rollers 85. The screw 91 in the slot 42 is set at the smallest radial distance. In addition, the support rollers 84 are attached to the stub axles 79 ... 83. Then, each longitudinal spar 68, 69 is individually inserted into the interior as bounded by the ring 48. For this purpose, the support rollers 84 connected to the longitudinal spar 68 and the associated guide rollers 84 are threaded into the gap between the two legs 65 and 66.
When the first longitudinal spar 68 with its accessories is inserted accordingly, the same operation is repeated with the other longitudinal spar 69.

As soon as both longitudinal bars 68, 69 are inserted, the screws 75 ... 78 are inserted through the associated openings, whereby the connecting struts 71..74 buckle against secured down. Subsequently, the two longitudinal beams 68, 69 pressed so far radially outward until the immediately attached guide rollers 85 fit into the ring 48 with little play, ie only a small radial clearance against the back 67 of the ring 48 show. In this position of the longitudinal members 68, 69 to each other, the screws 75 ... 78 are tightened. The two diametrically opposite guide rollers 85 in the bearing blocks 86 and 88 are now at a distance from each other, which corresponds approximately to the diameter of the ring 48 in the region of the inner side 67. In this position, the guide roller 85 is in the bearing block 87 with little play on the back 76.

After the stool 64 is adjusted in this way, the screw 91 is still adjusted in the slot 92 until the associated guide roller 85 shows a small distance to the back 67. The fifth wheel 64 is mounted in this way within this ring 48 and adjusted with respect to the radial clearance. He has in the guide and support ring 48 a small radial air. The axial air is defined by the diameter of the support rollers 84 relative to the distance of the legs 65 and 66. These rollers are cylindrical rollers and consist for example of low-friction PTFE, which has the sufficient capacity for roles of this type.

The height of the ring 48 measured over the outside of the two legs 65 and 66 is about 30 mm. The top of the profile leg 96, which points in the normal position of use of the bed 1 upwards, is about 5 mm above the top of the upper leg 66 of the ring 48 via. The rest of the fifth wheel 64 disappears in and under the ring 48. The rotary hinge 9 is thus only about the required to move the intermediate frame 10 gap over the top of the ring 48 and thus also over the top of the upper frame 34 via.

Once the assembly is completed in so far, the intermediate frame 10 is mounted on the turntable 64, to which the flanges 143 are placed on the flanges 96. The shaft 118 lies in the direction of the foot end of the bed 1. The intermediate frame 10 is screwed onto the turntable 64 by means of 4 screws which are not shown in the drawings for reasons of clarity. The screws pass through the pairs aligned openings 144, 145.

After assembly, there is a gap of approximately 10 mm between the upper side of the upper frame 34 and the lower side of the intermediate frame 10, formed by the underside of the longitudinal bars 107, which results in a very low overall height.

The two lower connecting struts 109 and 112 are not over this underside of the intermediate frame 10 down over.

Through the openings in the intermediate frame 10 which is bounded longitudinally by the struts 109 and 110 and 108, the motor 97 can be mounted. Depending on whether a right or a left turn is desired, the lifting tube 103 is connected to the motor abutment 98 or the motor abutment 99. These two motor abutments 98, 99 have from the vertical axis of rotation, in FIG. 6 symbolized by a cross 148, the same radial distance of about 10 cm. As the other engine abutment is at the foot end, retraction of the lift tube 103 causes clockwise rotation of the intermediate frame 10 when the lift tube 103 is attached to the engine abutment 98. On the other hand, a left-hand rotation occurs when the lifting tube 103 on the motor abutment 99th is anchored.

After the bed 1 is mounted so far, the connected together via the strut 26 longitudinal beams 25 of the thigh portion 15 are hinged to the foot-side ends of the two longitudinal beams 18 and 19. In turn, the longitudinal beams 27 of the lower leg portion 16 are attached to these. Then, by lifting the thigh and lower leg portions 15, 16, the rollers 122 are threaded into the guide rail 31.

In the upper frame then the motor 133, which is coupled via the clevis 139 with the connecting rod 131, and the shaft 118 is mounted. During assembly, the two guide rollers 141 are threaded into the associated guide rails 137 and 138.

In a similar manner as previously the thigh section 15 has been mounted, the back section 14 is now also fastened to the central section 13. An associated drive motor 149 is attached to the engine abutment 146 and connected with its lifting tube 151 with a coupling tab 152 which sits on the strut 24. The strut 24 is positioned so that it rests on the longitudinal spars 106 and 107 with the spine portion 14 horizontally aligned, and the engine abutment tab 152 is within the opening of the intermediate frame 10 which is bounded by the crossbar 108 to the head end. In this case, parts of the engine 149 protrude into the turntable 64.

In the following explanation of the operation of the nursing bed 1 is first of the recumbent according to the FIG. 1 went out. In this position, the base 1 is maximally moved together, ie the lifting tube 61 retracted in the guide tube 62. The toggle pairs 36, 37 are maximum folded. The intermediate frame 10 is located in the longitudinal direction of the bed 1. The back portion 14 is lowered and lies with its transverse strut 34 on the longitudinal members 106, 107 of the intermediate frame 10. By appropriate actuation of the drive motor 133, the levers 119, 120 are brought into a position in which the lower leg section 16 extends in a straight extension of the back section 14 or of the foot section 17. In this position, the self-driven thigh portion 15 with its strut 26 is also on the two longitudinal beams 106 and 107. In this position, the nursing bed 1 on no accessible from the outside squeezing. The support points on the intermediate frame 10 are moved by about 20 cm from the outer edge of the mattress 12 inwards and thus not accessible.

The patient may optionally upright the back portion 14. To do this, he sets the drive motor 149 in motion via a manual control. Its lifting tube 151 is extended and presses the back portion 14 upwards. The occurring flux of force closes over the struts 110 and 109 of the intermediate frame 10. Optionally, the fifth wheel 64 may be used for further support, if during assembly of the pillar 147 is brought against the strut 71 to the plant. It is achieved by a further support of the pillar 147, so that a load of the order of 80 kg at the upper cross member 23 of the back portion 14 can be lifted.

The raising of the lower leg portion 16 is done by the user setting the motor 133 in motion. The lift tube 132 is extended and pushes the connecting rod 131 in the direction of the shaft 118. This is rotated to pivot the levers 119, 120 and push up the lower leg member 16. By suitable stops in the guides 31 is at the same time the lower leg portion 16 when pivoting the lever 119, 120 used to the central portion 13. As a result, the thigh portion 15 is also placed obliquely upward as shown.

If the patient wishes to be put into a position by the nursing bed 1, similar to a healthy person sitting on the edge of the bed, he first moves the lower leg and the thigh section 15, 16 into the position FIG. 3 , In addition, the back portion 14 is placed in a position of about 45 °, so that during subsequent rotation no excessive projection over the Bettumriss comes about. Once the reclining frame 11 is set accordingly, the base 8 moves up until the bottom of the intermediate frame 10 can rotate freely over the top of the two side walls 5, 6.

When this position is reached, the lifting motor 57 is stopped and instead of the rotary hinge 9 associated with the rotary motor 97 is set in motion. Whose lifting tube 103 moves in and rotates the intermediate frame 10 together with the lying thereon lying frame 11 by 90 ° either to the left or to the right, depending on which repository 98, 99 of the rotary motor 97 is articulated.

Once the rotational end position is reached, the lifting motor 57 is restarted to drive the base 8 to its smallest position together. In the downward movement, the bottom of the intermediate frame 10 engages the top of the side wall 5 and pushes it down.

After reaching the lowest position of the engine 133 is set in motion and in such a way that the lifting tube 132 is pulled into the associated guide tube. This movement pulls the connecting rod 133 back whereby the lever 119, 120 are pivoted downwards. This downward pivoting of the levers 119, 120 causes the foot section to also pivot down until it retreats to the end position FIG. 2 reached. Finally, the patient can set the back section 14 steeper as needed. A steeper position during the turning process is generally perceived as uncomfortable with raised feet.

As can be seen from the functional description, the length of the lower leg portion 16 in the chair or chair position measured from the top of the mattress 12 may not be longer than the length of the lower leg in a normal-sized person. Otherwise he could not reach the ground with the soles of his feet. Since in the new bed, the base 8 can go very small and the height of the modules from the hinge hinge 9, the intermediate frame 10 and the reclining frame 11 is extremely low, still remain in the chair position about 12 cm. left over by the sub-frame 35 can be raised.

In the bed position according to FIG. 1 Thus, not only under the side wall 5, but also under the base 8 enough space so that nursing staff can close enough to the bed 1 remains.

As mentioned, the proportioning of thigh section 15 and lower leg section 16 must be based on the anatomy of the person. For the normal lying position of the lower leg section 16 would be too short, which is why the foot section 17 is provided, which carries its own mattress section.

With the help of the care bed 1, a patient from the lying position without any own effort and can without having to resort to the help of nursing staff, move to a sitting position across the bed.

He can also be brought back from this position back into the lying position by the above described movement takes place backwards.

Finally, the nursing bed 1 is also suitable as a stand-up. The patient first settles in a position FIG. 2 bring. Then he bends forward from the bed forward and simultaneously actuates the height adjustment of the base 8. He is thereby lifted on the buttocks, which he needs less force to get into the standing position. Such support is very helpful in patients with multiple sclerosis or muscle weakness. A patient who would otherwise rely on outside help to leave the bed, this can do with the help of the nursing bed 1 without outside help at its discretion.

FIG. 11 shows in an enlarged exploded view, a hinge 160, as used for example between the longitudinal beam 19 and the longitudinal spar 22. As well as in FIG. 11 can be seen, both longitudinal beams 19, 22 consist of a square tube with about 30 mm edge length. At the end of the longitudinal beam 22 is provided with a recess 161. The recess 161 protrudes a little way in the direction of the longitudinal direction of the spar 22 and a little way in the transverse direction. The depth of the recess 161 in the transverse direction is smaller than corresponds to the width of the longitudinal spar 22. The result is an imaginary hinge plate 162 whose length corresponds to the depth of the recess 161 in the longitudinal direction of the spar 22. This hinge tab 162 is formed at the edges by webs formed by the remaining portions 163 and 164 of the profile tube wall. As a result, the tab 162 as a whole gets the shape in the region of the hinge 160 a U-profile. In the middle of the tab 162 is a through hole 165.

The adjacent end of the spar 19 is provided with a notch 166 in the same manner, with the notch 166 facing to the opposite side. In each of the recesses 161 and 166 is seated in each case a plastic disc 167 and 168 with a cylindrical cross section and plan end surfaces. The disc 168 is provided on only one of its end surfaces with two grooves 169 and 170 which receive the webs 163 and 164. Similarly, the disc 167 in only one end surface grooves 171, 172 for the respective webs of the spar 19. The diameter of the two discs 167 and 168 is dimensioned so that the tabs 162 with its free end not on the outer peripheral surface of the discs 167th and survive 168.

The hinge 160 shown is mounted by attaching to each tab 162 the associated disc 168 and 167, respectively. The stiffening webs 164 and 163, which otherwise merge integrally and continuously in the profile tube forming the spar 19 and 22, is taken up in the grooves 169, 170 and 171 and 172 entirely. A cylindrical bore 173 contained in each disc 167 and 178 is aligned, with the respective 165 in the tab 162. Through these holes, a screw 174 is inserted, which is secured on the other side with a nut (not shown). By the screw 174, the hinge 160 is biased backlash.

The discs 167 and 168 act, so to speak, as a sliding and filling piece to fill the open space within each tab 162 and form a sliding surface for the respective other disc 167, 168. Since the discs are larger in diameter than the thickness of the profile tube for the spars 19 and 22 also arises when bending the hinge 160 no shearing point, since the two discs 167 and 168 are of the same diameter each other.

The hinge 160 shown is readily capable of absorbing considerable compressive and tensile forces. Such considerable forces occur, for example, at the connection between the central part 13 and the back portion 14.

While in the embodiment of the preceding figures, a rotary hinge 9 is used, in which the support ring 48 constitutes a full circle shows FIG. 12 a modification with a rotary hinge 9, the support ring has a radius which corresponds to the clear width between the two longitudinal beams 42 and 43 substantially.

Already explained components are in the embodiment according to FIG. 12 provided with the same reference numerals and not explained again.

FIG. 12 shows in a plan view, the upper frame 34 with the two longitudinal beams 42 and 43, which are connected at both ends via the transverse struts 44 and 45. The cross strut 46 is omitted. The rotary hinge 9 has a support ring 48 which begins in the inner corner between the longitudinal beam 43 and the transverse strut 44, from there in a circular arc to the inside of the longitudinal spar 42 extends and about the point of contact with the longitudinal spar 42 by about 45 ° extended. Thus, the support ring 48 has a total length corresponding to a centering angle of about 135 °.

The support ring 48 is connected to the upper frame 34 in the region of the inner corners between the transverse strut 44 and the longitudinal member 43 on the inner side of the longitudinal member 42 and via further struts 180, 181 and 182.

The fifth wheel 64 has only one of the two longitudinal struts, for example, the longitudinal spar 68, from the dreickeckförmig two in the direction of the longitudinal spar 43 converging connecting struts 183 and 184 go out. The connecting struts 183 and 184 terminate at a hub 185 to which they are rigidly connected.

The hub 185 is rotatable on an underlying bracket, which is fixed to the inside of the longitudinal spar 43. The axis of rotation of the hub 185 corresponds to the center of the support ring 48th

At the ends of the longitudinal spar 68, sitting as before, the axle journals 79 and 81, on which rotatably the cylindrical support rollers 84 are arranged. The support rollers 84 engage, as before, between the legs 65 and 66 of the support ring 48, which also in the embodiment according to FIG. 12 the cross-sectional profile corresponding to "A" off FIG. 5 having.

On the outside of the longitudinal spar 68 of the mounting flange 96 is provided with de mounting holes 145. Another mounting flange 186 is mounted on the upper side facing the viewer of the two triangularly extending connecting struts 183 and 184. The mounting flange 184 is in the same plane as the mounting flange 96 with respect to the plane as defined by the support ring 48.

On the two mounting flanges 96 and 186, the intermediate frame 10 is mounted as before.

Evidently, in use, the intermediate frame 10 rotates as it rests on a top frame FIG. 12 is attached to an axis which is immediately adjacent to one of the two longitudinal beams. The advantage of this arrangement is that the lying frame rotates about a location that is very close to the outer edge of the bed 1.

This avoids that the lying frame 11 moves with the inner edge when turning too strong toward the head of the bed 1. It must be accepted that the construction can not be easily changed from a left-handed to a right-handed variant, as can be achieved in the above example when moving the rotary motor 97.

Another advantage of the arrangement FIG. 12 is that even beds can be realized in which the bed width exceeds the standard 90 cm.

A nursing bed has a height-adjustable base, in which largely sunk a rotary hinge is mounted. The hinge connects the base with an intermediate frame on which the actually lying frame is built. As a result, a bed position is achieved, which after deduction of the height of feet has a very low height, so that in the lowest position, the upper edge of the mattress from the bottom of the length of the lower leg corresponds, while at the same time below the base still remains space to the ground.

Claims (6)

bed
with a lying frame (11) which is divided into at least one central portion (13) has a back portion (14) and a foot portion (15,16), wherein each section comprises two mutually parallel longitudinal beams (18,19), and
each having a hinge (160) connecting two abutting longitudinal beams (18, 22) of adjacent sections,
wherein each longitudinal spar (18,22) is formed by a square tube, which merges integrally into a hinge strap (162). Rotary bed according to claim 1, characterized in that between the hinge plates (162) at least one circular disc-shaped spacer member (167,168) are arranged. Rotating bed according to claim 1, characterized in that two spacer members (167,168) are provided, each of which is rotatably connected to the associated hinge plate (162). Rotary bed according to claim 1, characterized in that the hinge plate (162) has a U-shaped cross-sectional profile, such that two mutually parallel strips (163,164) arise, the profiles of two hinge (160) forming hinge straps (160) in such a way are arranged so that the U-profiles open towards each other. Rotary bed according to claim 1, characterized in that the hinge plate (162) passes smoothly and free of steps in the course of the respective longitudinal spar (18,19). Rotary bed according to claim 1, characterized in that the longitudinal spar (18,22) is formed by a square tube and that the hinge plate (162) of the remaining part at an end-side recess (165,166) of the longitudinal spar (18,22) is formed.

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