Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
  • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
  • A61G7/08—Apparatus for transporting beds
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
  • B62B5/00—Accessories or details specially adapted for hand carts
  • B62B5/0026—Propulsion aids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
  • B62B5/00—Accessories or details specially adapted for hand carts
  • B62B5/0026—Propulsion aids
  • B62B5/0033—Electric motors
  • B62B5/0036—Arrangements of motors
  • B62B5/005—Detachably mounted motor units
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
  • B62B5/00—Accessories or details specially adapted for hand carts
  • B62B5/0026—Propulsion aids
  • B62B5/0033—Electric motors
  • B62B5/0036—Arrangements of motors
  • B62B5/0043—One motor drives one wheel

Definitions

• the invention relates to a hospital bed with a chassis, with four mounted on the chassis rollers and at least one further brought into contact with the ground optionally driven auxiliary role, the additional role is stored on a rigid frame and together with the frame relative to the chassis by pivoting raised or lowered is, further provided a fixed to the frame drive motor for the additional role and a separate pivoting drive is provided for raising and lowering the additional role.
• auxiliary roller is accommodated in a housing, which housing is pivotally connected to the chassis. At the free end of the housing engages a separate pivot drive, which is pivotally connected to the chassis.
• a generic hospital bed is previously known from US Pat. No. 6,772,850 B1.
• the auxiliary roller and the drive motor are received by a housing which is mounted on one end of a leaf spring.
• the other end of the leaf spring is connected to the chassis.
• the leaf spring acts on the auxiliary roller in the direction of the floor.
• a mechanism is provided which engages and biases on a housing projecting end of the leaf spring. The mechanism is firmly connected to the chassis. If the mechanism releases the leaf spring, the additional roller shifts in the direction of the floor.
• the invention has for its object to design a generic hospital bed as initially assumed advantageous.
• the pivoting drive, the auxiliary roller and the drive motor together with the frame form a unit.
• the frame also completely absorbs the weight of the pivoting drive.
• the unit can be mounted as a whole on a chassis of a hospital bed in the simplest way. This makes it possible, in the context of a workshop pre-assembly, already make the orientation of the rotary actuator, especially an eccentric, as described in detail below, with regard to the additional role.
• the unit of frame, drive motor and additional role is also advantageous in terms of upgrading existing hospital beds with such an additional role. Regardless or in addition to this, the compact design is an advantage. Furthermore, the fact that a concentration is created by weight. This can contribute to the stability of the hospital bed.
• the pivoting drive by means of an eccentric the frame relative to the chassis on which the eccentric is also supported moves. It is only a touching interaction so far with the chassis required, but for example no articulated connection. This can, as explained, but rather be realized independently thereof.
• the moving parts are reduced.
• the eccentric may be formed by an eccentric disc fixedly mounted on the shaft. The rotational movement for the eccentric is generated by the pivoting drive. If the arrangement is provided so that the axes of the Verschwenkan- drive and the eccentric intersect, a gear is required to transmit the driving force from the pivot drive to the eccentric. However, it is preferred that the axes or shafts are parallel or aligned in this respect.
• a drive shaft of the pivoting drive can for this purpose advantageously directly carry the already mentioned eccentric disc.
• a stop is given in relation to a ground contact position of the additional role.
• a comparatively rigid (in the printing direction of the additional role) interaction between the additional role and the chassis is given, as is the case with respect to the conventional roles in such a hospital bed anyway.
• the - only - eccentric support of the additional role on the chassis of the hospital bed can also be used to the effect that the eccentric rests in the ground contact position not directly on the Chas- sis, but by mediating a balance part.
• Such a compensation part can be further preferably a spring part, which is supported on the one hand on the chassis and on the other hand on the additional role or specifically the eccentric.
• a compression spring biasing the frame (as a whole) into the lowered position is suitable.
• This spring then acts as a shock absorber when lowered, in contact with the ground additional role. The contact of the additional role with the floor is secured even at high speeds and bumps.
• said compression spring acts on the eccentric by means of a pressure lever applied to a chassis-fixed axis.
• the pressure lever can pivot about the same axis as the auxiliary roller. This is usually the same axis, which holds the frame pivotally on the chassis.
• the immediate interaction with the eccentric can be realized. It is not necessary that the spring rests directly on the eccentric.
• a roller for example in the manner of a ball bearing ring, can be provided on the pressure lever or possibly also on the eccentric. It thus results in movement a favorable role transfer.
• the eccentric does not only interact with the chassis via the spring. Because this alone, the frame would be constantly in the lowered position. Raising and lowering, in addition, in addition, at least with respect to a certain portion of the lowering or lifting stroke, a rigid support of the eccentric relative to the chassis is required.
• a support arm is provided, with which - circumferentially offset with respect to the eccentric to the interaction between the described pressure lever and the eccentric (when the pressure lever is provided) - the eccentric also cooperates. Also with regard to this support arm, the realization of tion of a rolling motion, by the already described in connection with the pressure lever ball bearing-like training.
• the support arm forms the already mentioned stop for the eccentric.
• a mounting plate is preferably provided, with which the frame is pivotally connected, wherein - only - the mounting plate is firmly connected to the chassis of the hospital bed.
• the mentioned support arm is part of the mounting plate.
• the articulation (pivot bearing) or support of the eccentric, possibly also by means of the compression spring described, thus takes place only relative to a part that can be readily incorporated into the assembly of the frame with additional role and pivot drive.
• the mounting plate alone is to be mounted firmly on the chassis.
• the frame is - only - pivotally connected to the mounting plate.
• the upgrade of a hospital bed with the additional role by the mounting plate is again significantly simplified. It must be made on the chassis of the hospital bed, for example, only the holes for mounting the mounting plate.
• the frame itself, it is preferably provided that it consists of two opposite frame walls, in the longitudinal extent of which the shafts of the additional roller and of the eccentric are mounted one behind the other. Furthermore, it can be provided that the frame walls, in addition to the connection through said shafts, are still connected to one another by means of a transverse connection serving only the stiffening. Between the frame walls, the additional role, the eccentric, the pivot drive, the pressure lever with spring and the support arm are added. By the frame walls, these components are protected against external influences low.
• An additional cross-connection is preferably provided in such a way that it serves to obtain a measured value which can be used to determine in which (lowering) position the additional roll is located.
• an inductive proximity switch may be provided on the support arm, which registers the distance from this strut to the support arm.
• the support arm is stationary, while the cross-connection moves together with the frame in a lowering or raising.
• the cross-connection can for this purpose, for example, consist of a simple metal strip, since the inclusion of forces is not in the foreground.
• the pivot drive for the eccentric is preferably arranged completely between the frame walls.
• a drive motor and / or a gearbox for the additional roller can be arranged on the outside on one of the frame walls.
• the drive motor is easily accessible. Since, in any case, the drive motor for the additional roller is substantially larger than the drive motor for the pivoting drive anyway, otherwise considerable empty space would arise between the frame walls.
• the additional role may be a castor, the tread is made comparable soft (for example, made of soft rubber, in order to achieve a good traction).
• the diameter of the additional roller is preferably equal to or smaller than the diameter of the other, usual, attached to the chassis of the hospital bed casters.
• the preferably connected between the drive motor for the additional role and the additional role gear is further preferably designed so that it has no self-locking, so only the lowest possible friction value. This is advantageous in that even if the engine fails or, for example, if the engine is not to be switched on for smaller distances, a simple moving of the hospital bed is also possible if the hospital bed is not switched off. lowered additional role is cheap possible.
• the additional role has in this sense a freewheel.
• a corresponding connection is made with a usually already existing accumulator in the hospital bed.
• electric drives are usually already present on the hospital bed, which can be powered by a battery.
• corresponding switches and a control unit on the hospital bed are then preferably provided.
• the switch can be a pushbutton which must be pressed all the time if the auxiliary roll support is to be used. This brings with it the advantage of safe operation.
• On the actuation of the push button on the one hand can pivot the auxiliary roller by means of the pivoting drive from the release position in the ground contact position and on the other hand drive the drive motor, the additional role.
• This described process can be stored, for example, in a controller of the control unit. Further, in particular supplementary, it is also preferable, with the aid of the control unit, to drive-control the additional roller in such a way that a slow acceleration is realized. As a result, a jerk-free start of the hospital bed should be possible.
• the drive motor of the additional roller switches off independently if the remaining energy content of the accumulator falls below a certain predetermined level. This in particular also to ensure that the remaining energy is sufficient to relocate the additional role by means of the pivoting drive in the release position.
• a corresponding query mechanism may be provided.
• Suitable, for example, an inductive proximity switch which detects the position of the additional role relative to the chassis of the hospital bed.
• a proximity switch is attached to the support arm, which projects from the underside of the chassis of the hospital bed between the frame walls. Now, when the frame lowers, the proximity switch, which is mounted on the support arm, detect a pivoting part with the frame with respect to the distance to the proximity switch and derive from this the position of the additional role.
• Fig. 1 is a perspective view of a hospital bed, at the
• Chassis an additional role is mounted, which is in the release position;
• FIG. 2 shows a bottom view of the additional roller in the direction of view II from FIG. 1;
• Fig. 3 is a perspective bottom view of the auxiliary roller
• Fig. 4 is a section along the line IV - IV of Fig. 2;
• Fig. 5 is a side view of the additional role in the intermediate position according to
• FIG. 6 is a section corresponding to FIG. 4, but here is the additional role in the ground contact position.
• FIG. 1 shows a perspective view of a hospital bed 3 with a chassis 2 and an additional roller 1 arranged thereon, wherein, however, an accumulator and various operating elements have not been shown.
• the additional role 1 can be arranged between the rollers 4 of the head or foot of the hospital bed 3. But it is also conceivable that the additional roller 1 is fixed centrally to the four respectively arranged at the corners of the chassis 2 rollers 4 on the chassis 2.
• the additional roller 1 is in each case preferably oriented such that the running direction of the auxiliary roller 1 runs parallel to the longitudinal extent of the hospital bed 3.
• the additional roll 1 is received in a frame 5, which consists in the embodiment of two mutually parallel frame walls 6, 6 '. Between the frame walls 6, 6 ', the auxiliary roller 1 is arranged. As can be clearly seen in FIG. 2, the additional roller 1 is off-center, namely arranged closer to the frame wall 6 '. This results in a favorable nesting with the other units still described.
• the direction of the additional roller 1 is parallel to the frame walls 6, 6 '.
• the shaft 7 of the auxiliary roller 1 is stored in stock by the frame wall 6 without passing through them, and passes through the frame wall 6 ', wherein here also a storage is realized.
• the shaft 7 is fixedly connected to the auxiliary roller 1.
• the protruding from the frame wall 6 'end of the shaft 7 is connected to a gear 8, via which gear 8, a drive motor 9, the auxiliary roller 1 drives.
• the transmission 8 and the drive motor 9 are fixed from the outside to the frame wall 6 '.
• the drive motor 9 is an electric motor.
• the gear 8 is designed so that it is not self-locking and has the lowest possible internal friction. Hereby, a freewheel effect can be achieved.
• a plug connection 35 is provided on the transmission 8.
• a mounting plate 10 is provided in addition to the frame walls 6, 6 '. In addition to the frame walls 6, 6 '. In addition to the frame walls 6, 6 ', a mounting plate 10 is provided. In the embodiment, the mounting plate 10 between the frame walls 6, 6 ', whose the underside of the chassis of the hospital bed associated areas arranged.
• the frame 5 is pivotally connected by means of an axis 11 with the mounting plate 10 fixed in the installed state with the chassis of the hospital bed.
• the axis 11 is in the embodiment with the frame walls 6, 6 'screw connected.
• the frame walls 6, 6 ' are connected not only by the axis 11 but also by the shaft 7 of the auxiliary roller 1.
• the frame 5 is also formed with cross connections 12, 13.
• a transverse connection 12 is arranged in the vicinity of the auxiliary roller 1 and a further transverse connection 13 in the form of an auxiliary plate near the axis 11.
• the cross connection 12 is formed by a bolt which has a diameter-reduced portion 14. The bolt thus forms as it were a bracing between the frame walls 6, 6 '.
• the section 14 is assigned to the additional role 1.
• the cross-connection 13 is connected in the embodiment with the end faces of the frame walls 6,6 'by means of screws.
• holes 15 are formed in the mounting plate 10, which - in the embodiment - cylinder head bolts 16 are penetrated.
• the cylinder head bolts 16 are screw-retained in corresponding threaded holes 17 of the chassis 2.
• Figures 4 and 6 show a section through a bore 15 with a recessed cylinder head screw 16.
• the mounting plate 10 forms an edge-open recess 36 in the direction of the axis 11 from.
• the mounting plate 10 tapers in the region of the open-edged recess 36 and thus forms a sloping ceiling 37.
• This ceiling 37 projects beyond only a portion of the recess 36.
• the angle of the ceiling 37 is approximately 20 ° to the lying surface of the hospital bed 3.
• the recess 36 is arranged centrally in the mounting plate 10 and is about half as wide as the total width of the mounting plate 10 is (see Figure 2).
• an end portion 38 of a support arm 18 is inserted in the recess 36.
• the end portion 38 is conformed to the width of the recess 36.
• the substantial width of the support arm 18 is wider than the width of the recess 36 and so the support arm 18 forms lateral shoulders 39 which rest on the mounting plate 10.
• the support arm 18 is fixedly connected to the mounting plate 10 by the axle 11.
• the shoulders 39 contribute to the fact that the support arm 18 is rigidly connected to the mounting plate 10.
• the support arm 18 has approximately a right angle to the mounting plate 10 and projects into the space between the two frame walls 6,6 '.
• an annular body 19 is arranged, which is rotatable according to the outer ring of a ball bearing on balls. Specifically, this is a storage of the balls and the ring body 19 receiving axis between two legs 40 is provided.
• an eccentric 20 cooperates with the annular body 19.
• the annular body 19 allows a rolling with respect to the eccentric 20.
• the eccentric 20 is, in the embodiment centered, between the frame walls 6,6 'arranged on a shaft 21.
• the shaft end which is associated with the frame wall 6, part of a transmission 22.
• the shaft 21 can be driven by the pivoting drive 23.
• the pivot drive 23 and the gear 22 are mounted on the inside of the frame wall 6 and together form the pivot unit for the auxiliary roller 1.
• the pivot drive 23 is connected via a cable 24 with a power source, by means of an intermediate control device, connected.
• the pivoting drive 23 extends laterally along the additional roller 1. The arrangement in a juxtaposition of the additional roller 1 and the pivoting drive 23 makes it possible to achieve a favorable overall size of the frame 5.
• the two axes of symmetry of the pivoting drive 23 and of the drive motor 9 run approximately parallel to one another.
• the symmetry axes of the shafts 7, 21 of the additional roller 1 and the eccentric 20 extend approximately at right angles to one another (see FIG. 2).
• a pressure lever 25 is provided.
• the pressure lever 25 lies directly in the pivoting path of the eccentric 20 or in the narrow sense of the shaft 21 when the frame 5 is pivoted.
• The is supported by a spring 27, which rests on the one hand on the chassis of the hospital bed or specifically in the embodiment of the mounting plate 10 and on the other hand - by means of the pressure lever 25 - on the eccentric 20.
• the pressure lever 25 is Ausrete - tion further supported on the support arm 18.
• the support arm 18, on the chassis side, a recess 41, and an axis 11 which passes through the pressure lever 25 at the foot.
• the pressure lever 25 also has an annular body 26 on the eccentric side.
• the annular body 26 is also mounted on the end of the pressure lever 25 by balls, not shown, corresponding to a ball bearing.
• the pressure lever 25 is acted upon by the spring 27 in a counterclockwise direction with respect to FIGS. 4 and 6. It is obvious that the pressure lever 25 thus always bears against the eccentric 20, while this need not be necessary for the support arm 18, cf. Figure 6. In this respect, the pressure lever 25 acts together with the spring 27 in the sense of a shock absorber. The movement of the auxiliary roller 1 on the ground, ie in the lowered position, can thereby be compensated and damped (relative to movements in the vertical direction).
• one end of the compression spring 27 is received in a receiving cavity 28 of the pressure lever 25.
• the other end of the spring 27 is located in a receiving cavity 29 of the ceiling 37 of the recess 36 of the mounting plate 10 a.
• a sensor 30 is arranged laterally on the support arm 18.
• the sensor 30 may be, for example, an inductive proximity switch.
• a necessary for the sensor 30 connecting cable 31 is mounted on the side of the auxiliary roller 1 of the sensor 30. This connection cable 31 is subsequently passed through a bore 32, which runs parallel to the mounting plate 10.
• the sensor 30 is arranged at the level of the transverse connection 13 (see FIGS. 4 and 6).
• a stop pin 33 projects from the frame wall 6 'into the intermediate space between the two frame walls 6, 6'.
• the stop pin 33 prevents too wide pivoting of the frame 5 in the clockwise direction.
• the stop pin 33 abuts in the release position with its lateral surface on the surface of the mounting plate 10 and thus limits the pivoting path of the frame 5.
• the shafts 7,21 are received by ball bearings, which have not been shown in the drawings. The ball bearings lie in receiving holes in the frame walls 6,6 'of the frame 5 a.
• the auxiliary roller 1 is in the release position.
• the additional roller 1 is limited in the direction of the release position by the stop pin 33, which abuts against the mounting plate 10.
• the auxiliary roller 1 is spaced from the floor 34.
• the drive direction of the auxiliary roller 1 can be selected by a directional switch, and then the auxiliary roller 1 can be displaced into its ground contact position (FIG. 6) by a pushbutton.
• the button of the pivoting drive 23 is started, so that the eccentric 20 moves from the position in Figure 4 in the position in Figure 6.
• the region of the largest dimension (the distance between the outer circumference of the eccentric disk and the axial center of the eccentric axis) of the eccentric 20 bears against the annular body 19 of the support arm 18.
• FIG. 5 shows an intermediate position.
• the eccentric 20 has been displaced by means of the pivoting drive 23 in the counterclockwise direction.
• the region of the largest dimension of the eccentric 20 bears against the annular body 26 of the pressure lever 25.
• the shaft 21 has a much smaller distance to the annular body 19, wherein the eccentric 20 and the annular body 19 vor- do not touch.
• the eccentric 20 has a certain distance from the annular body 19 of the support arm 18.
• a "deflection" of the auxiliary roller 1 is achieved that, if irregularities occur in the floor 34, the spring 27 can shift the additional roller 1 further counterclockwise, so that there is always ground contact with the additional roller 1.
• the spring 27 compensates for the unevenness in the floor 34.
• the additional drive falls away by the drive motor 9 and the pivot drive moves the eccentric 20 in the position that has been shown in the figure 4.
• the eccentric 20 runs on the annular body 19 and increases the distance between the axis of the annular body 19 and the axis of the shaft 21.
• the frame 5 is pivoted about the axis 11 in the direction of the release position. It is also preferred that only as long as the support is given by the additional role 1 until a predetermined energy level of the accumulator is reached. When this energy level is reached, the controller turns off the drive motor 9 for the auxiliary roller 1. However, the energy level is still sufficient to relocate the additional role 1 by means of the pivoting drive 23 in its release position. Thus, important functions of the hospital bed 3 are preserved.
• Cross connection 13 and the support arm 18, on which the sensor 30 is arranged Due to the different distances, the control unit can derive the position of the additional roller 1 with the aid of the sensor 30.
• the cross connection 13 shifts in proportion to the displacement of the auxiliary roller. 1

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Nursing (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Invalid Beds And Related Equipment (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38015244

Family Applications (1)

Country Status (12)

Cited By (13)

Families Citing this family (18)

Citations (1)

Family Cites Families (28)

• 2006
  • 2006-02-17 DE DE102006007377A patent/DE102006007377A1/de not_active Withdrawn
• 2007
  • 2007-02-08 ES ES07704448.5T patent/ES2553884T3/es active Active
  • 2007-02-08 WO PCT/EP2007/051195 patent/WO2007093549A1/de not_active Ceased
  • 2007-02-08 EP EP07704448.5A patent/EP1983959B1/de not_active Not-in-force
  • 2007-02-08 JP JP2008554744A patent/JP4887380B2/ja not_active Expired - Fee Related
  • 2007-02-08 CA CA2640666A patent/CA2640666C/en not_active Expired - Fee Related
  • 2007-02-08 AU AU2007216572A patent/AU2007216572B2/en not_active Ceased
  • 2007-02-08 ES ES10194524.4T patent/ES2621783T3/es active Active
  • 2007-02-08 EP EP10194524.4A patent/EP2301506B1/de active Active
  • 2007-02-08 PL PL07704448T patent/PL1983959T3/pl unknown
  • 2007-02-08 PT PT101945244T patent/PT2301506T/pt unknown
  • 2007-02-08 PL PL10194524T patent/PL2301506T3/pl unknown
  • 2007-02-08 US US12/224,069 patent/US8662217B2/en active Active
  • 2007-02-08 CN CN2007800051849A patent/CN101384235B/zh active Active
  • 2007-02-08 DK DK10194524.4T patent/DK2301506T3/en active
  • 2007-02-08 CN CN201110023452.8A patent/CN102106776B/zh active Active
  • 2007-02-08 DK DK07704448.5T patent/DK1983959T3/en active

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