EP0311936B1 - Vehicle for stretcher - Google Patents

Vehicle for stretcher Download PDF

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Publication number
EP0311936B1
EP0311936B1 EP88116725A EP88116725A EP0311936B1 EP 0311936 B1 EP0311936 B1 EP 0311936B1 EP 88116725 A EP88116725 A EP 88116725A EP 88116725 A EP88116725 A EP 88116725A EP 0311936 B1 EP0311936 B1 EP 0311936B1
Authority
EP
European Patent Office
Prior art keywords
frame
rollers
stretcher
carriage according
front legs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88116725A
Other languages
German (de)
French (fr)
Other versions
EP0311936A1 (en
Inventor
Joachim Dipl.-Ing. Stollenwerk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stollenwerk Fabrik fuer Sanitaetsausruestungen Hans Stollenwerk and Cie GmbH and Co.
Original Assignee
Stollenwerk Fabrik fuer Sanitaetsausruestungen Hans Stollenwerk and Cie GmbH and Co.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stollenwerk Fabrik fuer Sanitaetsausruestungen Hans Stollenwerk and Cie GmbH and Co. filed Critical Stollenwerk Fabrik fuer Sanitaetsausruestungen Hans Stollenwerk and Cie GmbH and Co.
Priority to AT88116725T priority Critical patent/ATE70965T1/en
Publication of EP0311936A1 publication Critical patent/EP0311936A1/en
Application granted granted Critical
Publication of EP0311936B1 publication Critical patent/EP0311936B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00Stretchers
    • A61G1/04Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
    • A61G1/052Struts, spars or legs
    • A61G1/056Swivelling legs
    • A61G1/0562Swivelling legs independently foldable, i.e. at least part of the leg folding movement is not simultaneous
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00Stretchers
    • A61G1/02Stretchers with wheels
    • A61G1/0206Stretchers with wheels characterised by the number of supporting wheels if stretcher is extended
    • A61G1/02122 pairs having wheels within a pair on the same position in longitudinal direction, e.g. on the same axis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00Stretchers
    • A61G1/02Stretchers with wheels
    • A61G1/0237Stretchers with wheels having at least one swivelling wheel, e.g. castors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00Stretchers
    • A61G1/02Stretchers with wheels
    • A61G1/025Stretchers with wheels having auxiliary wheels, e.g. wheels not touching the ground in extended position
    • A61G1/0262Stretchers with wheels having auxiliary wheels, e.g. wheels not touching the ground in extended position having loading wheels situated in the front during loading
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00Stretchers
    • A61G1/02Stretchers with wheels
    • A61G1/0293Stretchers with wheels stretcher supports with wheels, e.g. used for stretchers without wheels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G1/00Stretchers
    • A61G1/04Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
    • A61G1/042Suspension means

Definitions

  • the invention relates to a driving device for a stretcher, with a frame, front and rear legs, which are articulated to the frame and lockable, and two placement rollers at the front end of the frame, (FR-A1-2 546 402).
  • a stretcher can be comfortably rolled, for example to the accident site or, in the case of a patient lying on the stretcher, to the patient transport vehicle.
  • the stretcher on the frame of the driving device is pushed together with the driving device onto the stretcher rack in the patient transport vehicle.
  • the driving device initially rests on the rear end of the stretcher support frame with its two mounting rollers fixedly attached to the front end of the frame and when the driving device is pushed further into the patient transport vehicle the front and rear legs articulated to the frame are pivoted up from the rear edge of the stretcher support frame to below the frame.
  • the placement rollers arranged at the front end of the driving device are advantageous when placing the driving device on the stretcher support frame, since the driving device stands securely with the touching rollers on the stretcher support frame when the front legs swivel up and no longer support the driving device against the ground.
  • the support rollers protrude further into the vehicle than the rollers on the stretcher. Since the conventional stretcher support racks are only intended for pushing on the stretchers, their guide rails which hold the rollers are shorter than is necessary for pushing on a driving device.
  • the use of the known driving devices thus requires at least one change, ie extension of the stretcher support frame and possibly even complete replacement of the stretcher support frame in the patient transport vehicle.
  • the invention has for its object to provide a driving device for a stretcher according to the preamble of claim 1, which does not require an adapted or modified stretcher rack.
  • the invention provides that the mounting rollers on the frame are guided in a longitudinally displaceable manner and can be locked at the front end of the displacement path relative to the frame by a locking device.
  • the placement rollers are not rigidly attached to the frame, but are guided on it in a longitudinally displaceable manner.
  • the placement rollers At the front end of their displacement path, at which the placement rollers are located at the height of the front end of the frame, they can be locked relative to the frame by a locking device that can be operated and released, for example, by hand.
  • the support rollers are in the locked state at the front end of the displacement path when the driving device is pushed onto the rear end of the stretcher support frame pulled out of the patient transport vehicle.
  • the distance between the mounting rollers and the pivot axis of the front legs on the frame is maximum, so that the driving device lies reliably on the carrier storage frame via the mounting rollers if the front legs are pivoted up when the rear edge of the carrier storage frame is touched. At this moment, the driving device lies on the stretcher support frame with its support rollers, while the rear legs are on the road; the driving device is therefore safe. When the driving device is pushed further up onto the stretcher support frame, the locking device is released so that the placement rollers are no longer fixed relative to the frame.
  • the driving device can therefore be pushed even further into the patient transport vehicle when the placement rollers touch the front end of the stretcher support frame; then namely the placement rollers move relative to the frame, ie in the fully inserted state the front end of the frame projects beyond the placement rollers.
  • the driving device adapts to the length of the conventional stretcher storage racks.
  • a stretcher support frame that is only suitable for holding a stretcher can thus also be used for holding the driving device according to the invention. Changes to the stretcher storage racks are not necessary.
  • the two requirements are met, on the one hand, to make the distance between the placement rollers and the front legs large when the driving device is placed on the stretcher support frame, so that the driving device rests securely when the frame is not supported by the front legs when they are swung up. Due to the longitudinal displaceability of the placement rollers relative to the frame, the other requirement is also met, the stretcher support frame unchanged, i.e. training just as short as before. Because when the driving device is retracted, the support rollers are located directly below the front rollers of the stretcher, i.e. retracted with respect to the front end of the frame of the vehicle. This has the advantages that the stretcher storage racks already installed in the patient transport vehicles can also be used for the driving device according to the invention and that the space available, in particular the space for the caregiver in the patient transport vehicle, is not reduced.
  • the placement rollers are advantageously resiliently biased towards the front end of their displacement path. As a result, when the driving device is pulled out, the placement rollers automatically assume their position again at the front end of the frame, where they are again locked by the locking device.
  • the locking device is coupled to a locking device for locking the front legs.
  • the support rollers are secured against displacement at the rear end of their displacement path when the front legs are pivoted up under the frame.
  • the placement rollers are at the level of the front rollers of the stretcher and immediately below them.
  • the mounting rollers are rotatably mounted on the two ends of an axis transverse to the frame, which is connected to a first sliding body which is guided in a longitudinally extending hollow profile bar and can be locked by the locking device.
  • the frame consists essentially of two longitudinal spars and one between the longitudinal spars and parallel to this extending hollow profile bar, in which a first sliding body is slidably guided, which is connected to an axis running transversely to the frame and arranged under the frame, at the ends of which a mounting roller is rotatably mounted.
  • the hollow profile strip has at least one downwardly open channel in which the sliding body is captively located.
  • the hollow profile bar gives the whole frame a compact structure that gives it the necessary strength.
  • the locking device is arranged on the hollow profile bar. Even more stability is given to the frame and thus to the entire driving device if the transverse axis is supported by support rollers from below on the two longitudinal spars. This largely prevents lateral tipping movements when the driving device is resting on the support rollers on the stretcher rack.
  • support struts are articulated on the front legs, which are movably connected to a second sliding body held displaceably in the hollow profile strip, which can be determined by the locking device which, when the front legs are pivoted down, the second sliding body and When the front legs are swung up under the frame, the first sliding body for the mounting rollers is locked.
  • the first sliding body rests against the second sliding body and the front end of the hollow profile strip when the front legs are pivoted down and locked and that the second sliding body rests against the first sliding body when the front legs are swung up under the frame.
  • the other sliding body, on which the locking device does not engage is simultaneously secured against displacement.
  • support struts are articulated on the front legs and are connected to the placement rollers.
  • the support struts which move relative to the frame when the front legs are pivoted, are connected to the axis on which the mounting rollers are mounted.
  • the placement rollers move automatically relative to the frame when the front legs are swung up when the driving device is pushed into the patient transport vehicle. In this way, a forced coupling between the pivoting of the legs and the displacement of the placement rollers is established.
  • the support struts are movably connected to the first sliding body, which in turn is connected to the axis of the placement rollers and is displaceably guided in the hollow profile strip. If the placement rollers are at the front end of the displacement path and are secured against displacement, the front legs are in the swung-down state, and they are also locked are. With the front legs swung up under the frame, the support struts are located at the rear end of the displacement path due to the forced coupling of the support struts to the mounting rollers. Even in this position of the front legs and the placement rollers, these elements are secured against movement by the locking device.
  • the set-up rollers are advantageously connected to a stop element which interacts with a locking part arranged on the stretcher support frame and which prevents the set-up rollers from moving back to the front end of the displacement path.
  • the stop element touches a locking part, for example a hook arranged on the stretcher support frame.
  • the frame moves with respect to the mounting rollers, as a result of which they are brought into their position at the rear end of the displacement path.
  • the placement rollers automatically assume the position at the rear end of the displacement path when the driving device is pushed into the patient transport vehicle.
  • the front end of the stretcher support frame can also serve as a locking part, against which the placement rollers collide when the driving device is inserted.
  • Fig. L shows the driving device with a stretcher thereon and locked legs pivoted down.
  • the driving device has a frame 10 which consists of two longitudinal bars 12 which are round in cross section (only one longitudinal bar is shown in the figures), a front transverse bar 14 and a rear transverse bar 16 exists.
  • a hollow profile strip 18 runs parallel to the longitudinal spars 12, the two ends of which are connected to the transverse spars 14 and 16.
  • the hollow profile strip has two channels 20 and 22 which are essentially circular in cross section and run parallel to the longitudinal bars 12 and are open at the bottom.
  • a plurality of sliding bodies in the form of short tubes are slidably held.
  • the channels each have a closed wall which extends over an angular range of approximately 270 °, so that the sliding bodies are held captively.
  • two front legs 24 and two rear legs 26 are rotatably supported, of which only one leg is shown in the drawings.
  • the rear legs 26 are articulated directly on the longitudinal spars 12 via joints 28.
  • a fork-shaped holder 30 on which a roller 32 is rotatably mounted.
  • the brackets 30 are rotatably attached to the legs 26 about a vertical axis 34.
  • the rollers 32 are thus the steering rollers of the driving device.
  • the two rear legs 26 are connected to one another by a cross strut 35.
  • Support struts 36 are rotatably attached to the cross strut 35.
  • the two free ends of the support struts 36 are connected via an axis 37 which is connected to a sliding body 38 located in the channel 22 of the hollow profile strip 18.
  • a support roller 40 is fastened, which rest against the longitudinal spars 12 from below and roll on the longitudinal spars 12 when the rear legs 26 are pivoted.
  • the Sliding body 38 can be separately locked and detached in the channel 22 via a locking device (not shown in detail).
  • the locking device is operated via a lever at the rear end of the frame 10.
  • a fork-shaped holder 42 is fixedly attached, which rotatably holds a roller 44.
  • the two upper ends of the front legs 24 are connected via an axis 45 extending transversely to the frame 10, at the two ends of which a support roller 46 is arranged, which abuts on the lower sides of the longitudinal spars 12.
  • the axis of the two support rollers 46 is connected to a sliding body 48 which is slidably arranged in the channel 20 of the hollow profile strip 18.
  • the two front legs are connected to one another via a cross strut 49, with which in turn two support struts 50 are connected in an articulated manner.
  • the two support struts 50 like the two support struts 36 for the rear legs 26, are connected via a transverse axis 51 (FIGS. 4 and 6) to a second sliding body 52, which is held captively in the channel 20 and can be moved longitudinally.
  • a support roller 54 is rotatably supported, which, like the support rollers 46 and 40, abuts against the longitudinal spars 12 from below.
  • the second sliding body 52 can be locked by a locking device in the channel 20 of the hollow profile strip 18.
  • the locking device consists of a rod 55 (FIG. 4), which runs parallel to the channels 20 and 22 and is rotatably held in the hollow profile strip 18, at the rear end of which a (not shown) Operating lever is arranged, which is located below the rear cross strut 16 of the frame 10 and is operable by hand.
  • a locking hook 58 is attached to the front end of the rod 55.
  • the locking hook 58 is immersed in a recess 60 in the second sliding body 52.
  • the rod 55 is biased in such a way that the locking hook 58 is in the locking position for locking the sliding body when the operating lever is not actuated.
  • the rod 55 is actuated, it is rotated against the force of the pretension.
  • first sliding body 56 which, like the second sliding body 52, is held in the channel 20 so as to be displaceable and lockable.
  • the first sliding body 56 is connected to a sleeve 59, to which an axis 60 extending transversely to the frame 10 is fastened.
  • the axis 60 runs below the frame 10 and projects on both sides over the longitudinal spars 12 (FIG. 5).
  • two support rollers 62 are rotatably mounted, which bear against the longitudinal spars 12 from below and roll on them when the axis 60 is moved.
  • Each support roller 62 has a flange 64 on both sides, and the design of the tread is adapted to the round longitudinal spars 12. Due to the two flanges 64 and the special design of the treads of the support rollers 62, these are secured against side movements, so that they always rest against the longitudinal spars 12 from below.
  • a fork-shaped holder 66 is fastened, the opening of which is directed downward.
  • a mounting roller 68 is rotatably held in the brackets 66.
  • the driving device rests on the stretcher support frame when it is pushed into the patient transport vehicle, which is indicated in the drawings by the reference number 70, via the placement rollers 68.
  • the axis 60 connected to the brackets 66 for the placement rollers 68 is supported by the support rollers 62 on the longitudinal spars 12 and by the sliding body 56 in the hollow profile strip 18, the placement rollers 68 are longitudinally displaceable in their position relative to the frame 10.
  • the stretcher 72 lies on the frame 10 of the driving device.
  • the stretcher 72 has two longitudinal spars 74, on each of which two fork-shaped holders 76, which are open at the bottom, are firmly attached.
  • the four rollers 78 of the stretcher 72 are rotatably mounted on the brackets 76.
  • the two front brackets and the two rear brackets are each connected by a rod 79 which runs transversely to the longitudinal direction of the stretcher 72 and which rests on the hollow profile strip 18 and the two longitudinal bars 12 from above.
  • the two rods 79 are located below the hold-downs 80 placed on the hollow profile strip 18 from above.
  • the stretcher 72 can be fixed on the frame 10 in the position shown in the figures by means of a locking hook 82 which is actuated by an actuating lever 84 at the rear end of the frame 10 in the hollow profile strip 18 is rotatably supported and protrudes upwards through an opening.
  • the locking hook 82 is advantageously designed as a catch locking the rear rod 79 so that the stretcher 72 is automatically locked when it is pushed onto the frame 10.
  • the driving device is first pushed from behind against the stretcher support frame 70 in the patient transport vehicle for insertion into the patient transport vehicle.
  • the mounting rollers 68 are located at the front end of the frame 10.
  • the first sliding body 56 connected to the mounting rollers 68 via the brackets 66 and the axis 60 is when the front legs 24 are pivoted down between the front end of the hollow profile strip 18 and the second sliding body 52 firmly enclosed.
  • the second sliding body 52 connected to the support struts 50 for the front legs is locked in the channel 20 of the hollow profile strip 18 by the locking hook 58. So that the enclosed first sliding body 56 is immovable, so that the placement rollers 68 at the front end of the frame 10, i.e. are secured against displacement at the front end of their displacement path (see FIGS. 1, 3 and 4).
  • the frame 10 When the driving device is pushed into the vehicle, the frame 10 initially rests on the stretcher support frame 70 via the placement rollers 68.
  • the stretcher support frame 70 has a lowerable receiving platform on which the placement rollers 68 initially run.
  • the placement rollers 68 rest on the stretcher support frame 70, from the medic can be released via a (not shown) lever at the rear end of the frame 10, the locking device for the second sliding body 52.
  • the driving device which is now no longer supported by the front legs 24, is then supported on the floor by the support rollers 68 on the stretcher support frame 70 and by the rear legs 26, which are still locked on the frame 10.
  • the safe resting of the driving device on the stretcher support frame 70 with unlocked front legs 24 is achieved in that the distance between the placement rollers 68 and the front support struts 50 is relatively large, which is due to the arrangement of the placement rollers at the front end of the frame 10 at the beginning of the sliding of the driving device on the stretcher support frame 70 is guaranteed.
  • the front support struts 50 When the driving device is pushed further into the transport vehicle, the front support struts 50 abut against the rear edge of the stretcher support frame 70.
  • the support struts 50 move relative to the frame 10, the support rollers 54 rolling on the underside of the longitudinal spars 12.
  • the front support struts 50 they pivot the front legs 24 to below the frame 10.
  • the second sliding body 52 is unlocked, with the result that the first sliding body 56 is also no longer locked on the hollow profile 18. Therefore, the landing rollers 68 can slide longitudinally relative to the frame away from the front end of the frame 10 toward the front legs 24 while running on the stretcher support frame 70.
  • the position in which the placement rollers 68 are located when the driving device is completely resting on the stretcher support frame 70 is shown in FIGS. 6 and 7.
  • the placement rollers 68 are located at the front end of the stretcher support frame 70 and in relation to the frame immediately below the front rollers 78 of the stretcher 72. This means that the placement rollers 68 move from the front end of the frame 10 to when the driving device is pushed into the transport vehicle Height of the front rollers 78 of the stretcher 72 have moved relative to the frame 10 to the rear end of their displacement path.
  • the placement rollers 68 are so exactly on the Position at which the front rollers 78 of the stretcher 72 are also when the stretcher 72 is pushed onto the stretcher support frame 70 without a driving device.
  • the stretcher support frame 70 does not need to be changed or extended for the driving device.
  • the first sliding body 56 is locked by the locking hook 58, which previously locked the second sliding body 52 of the front support struts 50 and thus locked the front legs 24 to the frame when the front legs were swung down.
  • the first sliding body 56 has a recess 86 into which the locking hook 58 is immersed when the placement rollers 68 are secured against displacement at the rear end of their displacement path.
  • the second sliding body 52 abuts the first sliding body 56 on one side.
  • the swung up front and rear legs 26, 24 are held under the frame 10 by catch hooks which are coupled to the respective locking device for the front and rear legs.
  • the catch hook 88 for the front legs 24 is shown.
  • the catch hook 88 protrudes downward from the hollow profile strip 18 and is fastened to the rod 55, on which the locking hook 58 for locking the first and second sliding bodies 56 and 52 is also arranged.
  • the catch hook 88 is thus pivoted over the rod 55. It engages around a pin 90 on the cross strut 49 connecting the two front legs 24.
  • the pin 90 runs parallel to the front legs 24.
  • the front legs are held or "caught" under the frame 10.
  • the front legs 24 are also released when the first sliding body 56 is unlocked by turning the rod 55.
  • the front legs 24 fall down due to their own weight when pulling out the driving device.
  • the last part of this pivoting movement is supported by a tension spring arranged between the second sliding body 52 and the front end of the hollow profile strip 18, which moves the second sliding body 52 back into its starting position.
  • the tension spring is indicated schematically in FIG. 6 by the dash-dotted line 92.
  • a tension spring is also arranged between the first sliding body 56 and the front end of the hollow profile strip 18. It is also indicated schematically by the dash-dotted line 94 in FIG. 6.
  • the tension spring 94 moves the sliding body 56 when the driving device is pulled out of the transport vehicle into its starting position, in which the placement rollers 68 are located at the front end of their displacement path, ie at the front end of the frame 10.
  • the placement rollers 68 are thus on the one hand when the front legs 24 are swung down by the second sliding body 52, which abuts the first sliding body 56 and moves it in the direction of the front end of the hollow profile strip 18, and on the other hand by the tension spring 94, which when the driving device is pushed in has been stretched back into the ambulance.
  • the front legs 24 are pivoted down, the locking hook 58 is again immersed in the recess 60 of the second sliding body 52, as a result of which this and thus the front legs are locked.
  • a plurality of recesses 60 and 60a, 60b are provided in the second sliding body 52.
  • the locking hook 58 will dip into one of these recesses and thus lock the sliding body 52, ie lock the front legs.
  • the driving device can also be brought to a shock low position, standing on its feet.
  • an Arider device (not shown) which engages the sliding body 48 of the front legs 24 must be released and can be actuated via a lever at the front end of the frame 10.
  • the front legs 24 pivot relative to the frame 10 and the front support struts 50, the support rollers 46 rolling on the underside of the longitudinal bars 12.
  • the front legs 24 move a little toward the rear legs 26, thereby lowering the front end of the frame.
  • the front legs 24 can be locked on the frame 10 via the sliding body 48 when the driving device is lowered.

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  • Health & Medical Sciences (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)
  • Apparatus For Radiation Diagnosis (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Handcart (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

The known carriages have set-down rollers arranged securely at the front end of a frame. With the carriage lying on the stretcher bearing support, these set-down rollers project further into the inside of the ambulance than do the running rollers of the stretcher itself. The use of the known carriages therefore requires that constructional changes be made to the stretcher bearing supports. <??>In contrast, the carriage according to the invention can also be used in the conventional stretcher bearing supports, without changes having to be made to the supports. <??>According to the invention, the set-down rollers (68) are arranged longitudinally displaceably on the frame (10), and at the front end of the frame (10) they can be fixed in their position relative to the frame (10) by means of a locking arrangement. By releasing the locking arrangement when pushing the carriage into the ambulance, the set-down rollers (68) push back relative to the frame, i.e. in the direction of the front legs (24), until they are finally situated directly under the front running rollers (78) of the stretcher (72). <IMAGE>

Description

Die Erfindung betrifft ein Fahrgerät für eine Krankentrage, mit einem Rahmen, vorderen und hinteren Beinen, die gelenkig mit dem Rahmen verbunden und arretierbar sind, und zwei Aufsetzrollen am vorderen Ende des Rahmens, (FR-A1-2 546 402).The invention relates to a driving device for a stretcher, with a frame, front and rear legs, which are articulated to the frame and lockable, and two placement rollers at the front end of the frame, (FR-A1-2 546 402).

Mit einem derartigen Fahrgerät läßt sich eine Krankentrage bequem beispielsweise zum Umfallort oder bei auf der Krankentrage liegendem Patienten zum Krankentransportfahrzeug rollen. Die auf dem Rahmen des Fahrgerätes befindliche Krankentrage wird zusammen mit dem Fahrgerät auf das Tragenlagerungsgestell im Krankentransportfahrzeug geschoben. Dabei liegt das Fahrgerät zunächst mit seinen beiden am vorderen Ende des Rahmens fest angebrachten Aufsetzrollen auf dem hinteren Ende des Tragenlagerungsgestells auf und beim weiteren Hineinschieben des Fahrgerätes in das Krankentransportfahrzeug werden die vorderen und hinteren gelenkig mit dem Rahmen verbundenen Beine von der hinteren Tragenlagerungsgestellkante bis unter den Rahmen hochgeschwenkt. Die am vorderen Ende des Fahrgerätes angeordneten Aufsetzrollen sind beim Aufsetzen des Fahrgerätes auf das Tragenlagerungsgestell vorteilhaft, da das Fahrgerät sicher mit den Aufsetzrollen auf dem Tragenlagerungsgestell steht, wenn die vorderen Beine hochschwenken und das Fahrgerät nicht mehr gegen den Boden abstützen. Die Aufsetzrollen ragen jedoch weiter ins Fahrzeuginnere hinein als die an der Krankentrage gelagerten Laufrollen. Da die herkömmlichen Tragenlagerungsgestelle nur zum Aufschieben der Krankentragen gedacht sind, sind ihre die Laufrollen aufnehmenden Führungsschienen kürzer, als es zum Aufschieben eines Fahrgerätes erforderlich ist. Der Einsatz der bekannten Fahrgeräte erfordert also zumindest eine Veränderung, d.h. Verlängerung des Tragenlagerungsgestells und unter Umständen sogar die komplette Auswechselung des Tragenlagerungsgestells im Krankentransportfahrzeug.With a driving device of this type, a stretcher can be comfortably rolled, for example to the accident site or, in the case of a patient lying on the stretcher, to the patient transport vehicle. The stretcher on the frame of the driving device is pushed together with the driving device onto the stretcher rack in the patient transport vehicle. In this case, the driving device initially rests on the rear end of the stretcher support frame with its two mounting rollers fixedly attached to the front end of the frame and when the driving device is pushed further into the patient transport vehicle the front and rear legs articulated to the frame are pivoted up from the rear edge of the stretcher support frame to below the frame. The placement rollers arranged at the front end of the driving device are advantageous when placing the driving device on the stretcher support frame, since the driving device stands securely with the touching rollers on the stretcher support frame when the front legs swivel up and no longer support the driving device against the ground. However, the support rollers protrude further into the vehicle than the rollers on the stretcher. Since the conventional stretcher support racks are only intended for pushing on the stretchers, their guide rails which hold the rollers are shorter than is necessary for pushing on a driving device. The use of the known driving devices thus requires at least one change, ie extension of the stretcher support frame and possibly even complete replacement of the stretcher support frame in the patient transport vehicle.

Der Erfindung liegt die Aufgabe zugrunde, ein Fahrgerät für eine Krankentrage nach dem Oberbegriff des Patentanspruchs 1 zu schaffen, das ein angepaßtes oder verändertes Tragenlagerungsgestell nicht erfordert.The invention has for its object to provide a driving device for a stretcher according to the preamble of claim 1, which does not require an adapted or modified stretcher rack.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß die Aufsetzrollen am Rahmen längsverschiebbar geführt und am vorderen Ende des Verschiebungsweges relativ zum Rahmen durch eine Arretiervorrichtung feststellbar sind.To achieve this object, the invention provides that the mounting rollers on the frame are guided in a longitudinally displaceable manner and can be locked at the front end of the displacement path relative to the frame by a locking device.

Bei dem erfindungsgemäßen Fahrgerät sind die Aufsetzrollen nicht starr am Rahmen befestigt, sondern an diesem längsverschiebbar geführt. Am vorderen Ende ihres Verschiebungsweges, an dem sich die Aufsetzrollen in Höhe des vorderen Endes des Rahmens befinden, sind sie relativ zum Rahmen durch eine z.B. von Hand betätigbare und lösbare Arretiervorrichtung feststellbar. Die Aufsetzrollen befinden sich im arretierten Zustand am vorderen Ende des Verschiebungsweges, wenn das Fahrgerät auf das hintere Ende des aus dem Krankentransportfahrzeuges herausgezogenen Tragenlagerungsgestell aufgeschoben wird. Der Abstand zwischen den Aufsetzrollen und der Schwenkachse der vorderen Beine am Rahmen ist maximal, so daß das Fahrgerät über die Aufsetzrollen zuverlässig auf dem Tragenlagerungsgestell aufliegt, wenn die vorderen Beine bei Berührung der hinteren Kante des Tragenlagerungsgestells hochgeschwenkt werden. In diesem Augenblick liegt das Fahrgerät mit seinen Aufsetzrollen auf dem Tragenlagerungsgestell auf, während die hinteren Beine auf der Straße stehen; das Fahrgerät steht also sicher. Beim weiteren Hinaufschieben des Fahrgerätes auf das Tragenlagerungsgestell wird die Arretiervorrichtung gelöst, so daß die Aufsetzrollen nicht mehr relativ zum Rahmen festgestellt sind. Das Fahrgerät kann demnach auch dann noch weiter in das Krankentransportfahrzeug hineingeschoben werden, wenn die Aufsetzrollen das vordere Ende des Tragenlagerungsgestells berühren; dann nämlich verschieben sich die Aufsetzrollen relativ zum Rahmen, d.h. im vollständig eingeschobenen Zustand steht das vordere Ende des Rahmens über die Aufsetzrollen über. Dadurch, daß die Aufsetzrollen längsverschiebbar am Rahmen geführt sind, paßt sich das Fahrgerät der Länge der herkömmlichen Tragenlagerungsgestelle an. Ein nur für die Aufnahme einer Krankentrage geeignetes Tragenlagerungsgestell ist somit auch für die Aufnahme des erfindungsgemäßen Fahrgerätes verwendbar. Veränderungen an den Tragenlagerungsgestellen, sind nicht erforderlich.In the case of the driving device according to the invention, the placement rollers are not rigidly attached to the frame, but are guided on it in a longitudinally displaceable manner. At the front end of their displacement path, at which the placement rollers are located at the height of the front end of the frame, they can be locked relative to the frame by a locking device that can be operated and released, for example, by hand. The support rollers are in the locked state at the front end of the displacement path when the driving device is pushed onto the rear end of the stretcher support frame pulled out of the patient transport vehicle. The distance between the mounting rollers and the pivot axis of the front legs on the frame is maximum, so that the driving device lies reliably on the carrier storage frame via the mounting rollers if the front legs are pivoted up when the rear edge of the carrier storage frame is touched. At this moment, the driving device lies on the stretcher support frame with its support rollers, while the rear legs are on the road; the driving device is therefore safe. When the driving device is pushed further up onto the stretcher support frame, the locking device is released so that the placement rollers are no longer fixed relative to the frame. The driving device can therefore be pushed even further into the patient transport vehicle when the placement rollers touch the front end of the stretcher support frame; then namely the placement rollers move relative to the frame, ie in the fully inserted state the front end of the frame projects beyond the placement rollers. Characterized in that the mounting rollers are guided longitudinally on the frame, the driving device adapts to the length of the conventional stretcher storage racks. A stretcher support frame that is only suitable for holding a stretcher can thus also be used for holding the driving device according to the invention. Changes to the stretcher storage racks are not necessary.

Mit dem erfindungsgemäßen Fahrgerät werden die beiden Forderungen erfüllt, zum einen den Abstand zwischen Aufsetzrollen und vorderen Beinen beim Aufsetzen des Fahrgerätes auf das Tragenlagerungsgestell groß auszubilden, damit das Fahrgerät sicher aufliegt, wenn die Abstützung des Rahmens durch die vorderen Beine bei deren Hochschwenken entfällt. Durch die Längsverschiebbarkeit der Aufsetzrollen relativ zum Rahmen wird aber auch der anderen Forderung entsprochen, das Tragenlagerungsgestell unverändert, d.h. genauso kurz wie zuvor auszubilden. Denn bei eingefahrenem Fahrgerät befinden sich die Aufsetzrollen direkt unterhalb der vorderen Laufrollen der Krankentrage, d.h. in bezug auf das vordere Ende des Rahmens des Fahrgeräts zurückgezogen. Das bringt die Vorteile mit sich, daß die bereits jetzt in den Krankentransportfahrzeugen eingebauten Tragenlagerungsgestelle auch für das erfindungsgemäße Fahrgerät eingesetzt werden können und daß das Platzangebot, insbesondere der Platz für den Betreuer im Krankentransportfahrzeug nicht verringert wird.With the driving device according to the invention, the two requirements are met, on the one hand, to make the distance between the placement rollers and the front legs large when the driving device is placed on the stretcher support frame, so that the driving device rests securely when the frame is not supported by the front legs when they are swung up. Due to the longitudinal displaceability of the placement rollers relative to the frame, the other requirement is also met, the stretcher support frame unchanged, i.e. training just as short as before. Because when the driving device is retracted, the support rollers are located directly below the front rollers of the stretcher, i.e. retracted with respect to the front end of the frame of the vehicle. This has the advantages that the stretcher storage racks already installed in the patient transport vehicles can also be used for the driving device according to the invention and that the space available, in particular the space for the caregiver in the patient transport vehicle, is not reduced.

Vorteilhafterweise sind die Aufsetzrollen in Richtung auf das vordere Ende ihres Verschiebungsweges federnd vorgespannt. Dadurch nehmen die Aufsetzrollen beim Herausziehen des Fahrgerätes automatisch wieder ihre Position in Höhe des vorderen Endes des Rahmens ein, wo sie durch die Arretiervorrichtung wieder festgestellt werden.The placement rollers are advantageously resiliently biased towards the front end of their displacement path. As a result, when the driving device is pulled out, the placement rollers automatically assume their position again at the front end of the frame, where they are again locked by the locking device.

Gemäß einer vorteilhaften Weiterbildung der Erfindung ist die Arretiervorrichtung mit einer Arretiervorrichtung zum Arretieren der vorderen Beine gekoppelt. Das erleichtert die Handhabung des Fahrgerätes, indem die Arretiervorrichtung für die Aufsetzrollen mit von derjenigen für die vorderen Beine abhängig betätigbar ist. Vorzugsweise ist für beide Arretiervorrichtungen nur ein einziger Betätigungshebel vorgesehen. Vorteilhaft ist es, wenn die Arretiervorrichtung für die Aufsetzrollen gleichzeitig diese gegen ein Verschieben und die vorderen Beine gegen ein Verschwenken sichert.According to an advantageous development of the invention, the locking device is coupled to a locking device for locking the front legs. This simplifies the handling of the driving device in that the locking device for the placement rollers can be actuated as a function of that for the front legs. Preferably, only a single actuation lever is provided for both locking devices. It is advantageous if the locking device for the placement rollers simultaneously secures them against displacement and the front legs against pivoting.

Vorteilhafterweise sind die Aufsetzrollen bei bis unter den Rahmen hochgeschwenkten vorderen Beinen am rückwärtigen Ende ihres Verschiebungsweges gegen Verschiebungen gesichert. In dieser Position befinden sich die Aufsetzrollen in Höhe der vorderen Laufrollen der Krankentrage und unmittelbar unter diesen. Dadurch wird die Lagerung des zusammengeklappten Fahrgerätes auf dem Tragenlagerungsgestell sicherer, da sich der Rahmen nicht mehr bezüglich der Aufsetzrollen, die auf dem Gestell aufliegen, verschieben kann.Advantageously, the support rollers are secured against displacement at the rear end of their displacement path when the front legs are pivoted up under the frame. In this position, the placement rollers are at the level of the front rollers of the stretcher and immediately below them. As a result, the storage of the folded driving device on the stretcher support frame is safer, since the frame can no longer move with respect to the placement rollers which rest on the frame.

Bei einer anderen Weiterbildung der Erfindung ist vorgesehen, daß die Aufsetzrollen an den beiden Enden einer zum Rahmen querverlaufenden Achse drehbar gelagert sind, welche mit einem ersten Gleitkörper verbunden ist, der in einer zum Rahmen längsverlaufenden Hohlprofilleiste verschiebbar geführt und durch die Arretiervorrichtung feststellbar ist. Der Rahmen besteht hierbei im wesentlichen aus zwei Längsholmen sowie einer zwischen den Längsholmen und parallel zu diesen verlaufenden Hohlprofilleiste, in der ein erster Gleitkörper verschiebbar geführt ist, der mit einer zum Rahmen querverlaufenden und unter dem Rahmen angeordneten Achse verbunden ist, an deren Enden jeweils eine Aufsetzrolle drehbar gelagert ist. Die Hohlprofilleiste weist mindestens einen nach unten offenen Kanal auf, in dem sich der Gleitkörper unverlierbar befindet. Durch die Hohlprofilleiste bekommt der ganze Rahmen eine kompakte Struktur, die ihm die notwendige Festigkeit verleiht. Die Arretiervorrichtung ist an der Hohlprofilleiste angeordnet. Noch mehr Stabilität wird dem Rahmen und damit dem gesamten Fahrgerät verliehen, wenn sich die querverlaufende Achse über Stützrollen von unten an den beiden Längsholmen abstützt. Damit werden seitliche Kippbewegungen bei über die Aufsetzrollen auf dem Tragenlagerungsgestell aufliegendem Fahrgerät weitestgehend ausgeschlossen.In another development of the invention it is provided that the mounting rollers are rotatably mounted on the two ends of an axis transverse to the frame, which is connected to a first sliding body which is guided in a longitudinally extending hollow profile bar and can be locked by the locking device. The frame consists essentially of two longitudinal spars and one between the longitudinal spars and parallel to this extending hollow profile bar, in which a first sliding body is slidably guided, which is connected to an axis running transversely to the frame and arranged under the frame, at the ends of which a mounting roller is rotatably mounted. The hollow profile strip has at least one downwardly open channel in which the sliding body is captively located. The hollow profile bar gives the whole frame a compact structure that gives it the necessary strength. The locking device is arranged on the hollow profile bar. Even more stability is given to the frame and thus to the entire driving device if the transverse axis is supported by support rollers from below on the two longitudinal spars. This largely prevents lateral tipping movements when the driving device is resting on the support rollers on the stretcher rack.

Bei einer weiteren vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, daß an den vorderen Beinen Stützstreben gelenkig gelagert sind, die mit einem in der Hohlprofilleiste verschiebbar gehaltenen zweiten Gleitkörper beweglich verbunden sind, welcher von der Arretiervorrichtung feststellbar ist, die bei herabgeschwenkten vorderen Beinen den zweiten Gleitkörper und bei bis unter den Rahmen hochgeschwenkten vorderen Beinen den ersten Gleitkörper für die Aufsetzrollen verriegelt. Hierdurch wird eine einzige Arretiervorrichtung zum Sichern der Aufsetzrollen gegen Längsverschiebungen und der Stützstreben gegen Längsverschiebungen, d.h. der vorderen Beine gegen ein Verschwenken auf einfache Weise realisiert.In a further advantageous embodiment of the invention it is provided that support struts are articulated on the front legs, which are movably connected to a second sliding body held displaceably in the hollow profile strip, which can be determined by the locking device which, when the front legs are pivoted down, the second sliding body and When the front legs are swung up under the frame, the first sliding body for the mounting rollers is locked. As a result, a single locking device for securing the placement rollers against longitudinal displacements and the support struts against longitudinal displacements, ie the front legs against pivoting, is realized in a simple manner.

Gemäß einer weiteren Ausgestaltung der Erfindung ist vorgesehen, daß der erste Gleitkörper bei herabgeschwenkten und arretierten vorderen Beinen an dem zweiten Gleitkörper und dem vorderen Ende der Hohlprofilleiste anliegt und daß der zweite Gleitkörper bei bis unter den Rahmen hochgeschwenkten vorderen Beinen an dem ersten Gleitkörper anliegt. Hierbei wird durch Verriegeln jeweils eines Gleitkörpers mit Hilfe der Arretiervorrichtung auch gleichzeitig der andere Gleitkörper, an dem die Arretiervorrichtung nicht angreift, gegen Verschiebungen gesichert.According to a further embodiment of the invention it is provided that the first sliding body rests against the second sliding body and the front end of the hollow profile strip when the front legs are pivoted down and locked and that the second sliding body rests against the first sliding body when the front legs are swung up under the frame. In this case, by locking one sliding body with the aid of the locking device, the other sliding body, on which the locking device does not engage, is simultaneously secured against displacement.

Bei einer bevorzugten Ausgestaltung der Erfindung sind an den vorderen Beinen Stützstreben gelenkig gelagert, welche mit den Aufsetzrollen verbunden sind. Die Stützstreben, die sich beim Verschwenken der vorderen Beine relativ zum Rahmen verschieben, sind mit der Achse, an der die Aufsetzrollen gelagert sind, verbunden. Damit verschieben sich die Aufsetzrollen relativ zum Rahmen automatisch, wenn die vorderen Beine beim Einschieben des Fahrgerätes in das Krankentransportfahrzeug hochgeschwenkt werden. Auf diese Weise wird eine Zwangskopplung zwischen dem Verschwenken der Beine und dem Verschieben der Aufsetzrollen hergestellt.In a preferred embodiment of the invention, support struts are articulated on the front legs and are connected to the placement rollers. The support struts, which move relative to the frame when the front legs are pivoted, are connected to the axis on which the mounting rollers are mounted. Thus, the placement rollers move automatically relative to the frame when the front legs are swung up when the driving device is pushed into the patient transport vehicle. In this way, a forced coupling between the pivoting of the legs and the displacement of the placement rollers is established.

Vorteilhafterweise sind die Stützstreben mit dem ersten Gleitkörper bewegbar verbunden, der seinerseits mit der Achse der Aufsetzrollen verbunden ist und in der Hohlprofilleiste verschiebbar geführt ist. Wenn sich die Aufsetzrollen am vorderen Ende des Verschiebungsweges befinden und gegen ein Verschieben gesichert sind, befinden sich die vorderen Beine im heruntergeschwenkten Zustand, wobei sie ebenfalls festgestellt sind. Bei bis unter den Rahmen hochgeschwenkten vorderen Beinen befinden sich aufgrund der Zwangskopplung der Stützstreben mit den Aufsetzrollen diese am hinteren Ende des Verschiebungsweges. Auch in dieser Position der vorderen Beine und der Aufsetzrollen sind diese Elemente gegen Bewegungen durch die Arretiervorrichtung gesichert.Advantageously, the support struts are movably connected to the first sliding body, which in turn is connected to the axis of the placement rollers and is displaceably guided in the hollow profile strip. If the placement rollers are at the front end of the displacement path and are secured against displacement, the front legs are in the swung-down state, and they are also locked are. With the front legs swung up under the frame, the support struts are located at the rear end of the displacement path due to the forced coupling of the support struts to the mounting rollers. Even in this position of the front legs and the placement rollers, these elements are secured against movement by the locking device.

Vorteilhafterweise sind die Aufsetzrollen mit einem Anschlagelement verbunden, das mit einem an dem Tragenlagerungsgestell angeordneten Sperrteil zusammenwirkt, welches eine Zurückbewegung der Aufsetzrollen zum vorderen Ende des Verschiebungsweges verhindert. Beim Aufschieben des Fahrgerätes auf das Tragenlagerungsgestell berührt das Anschlagelement ein Sperrteil, beispielsweise einen an dem Tragenlagerungsgestell angeordneten Haken. Beim weiteren Hinaufschieben des Fahrgerätes auf das Tragenlagerungsgestell verschiebt sich der Rahmen in bezug auf die Aufsetzrollen, wodurch diese in ihre Position am hinteren Ende des Verschiebungsweges gebracht werden. Auf diese Weise nehmen die Aufsetzrollen automatisch beim Hineinschieben des Fahrgerätes in das Krankentransportfahrzeug die Position am hinteren Ende des Verschiebungsweges ein. Als Sperrteil kann auch das vordere Ende des Tragenlagerungsgestell dienen, gegen das die Aufsetzrollen beim Einschieben des Fahrgeräts stoßen.The set-up rollers are advantageously connected to a stop element which interacts with a locking part arranged on the stretcher support frame and which prevents the set-up rollers from moving back to the front end of the displacement path. When the driving device is pushed onto the stretcher support frame, the stop element touches a locking part, for example a hook arranged on the stretcher support frame. When the driving device is pushed further up onto the stretcher support frame, the frame moves with respect to the mounting rollers, as a result of which they are brought into their position at the rear end of the displacement path. In this way, the placement rollers automatically assume the position at the rear end of the displacement path when the driving device is pushed into the patient transport vehicle. The front end of the stretcher support frame can also serve as a locking part, against which the placement rollers collide when the driving device is inserted.

Nachfolgend wird anhand der Figuren ein Ausführungsbeispiel der Erfindung näher erläutert. Im einzelnen zeigen:

Fig. 1
eine Seitenansicht des Fahrgerätes mit darauf befindlicher Krankentrage,
Fig. 2
eine Seitenansicht des teilweise auf das Tragenlagerungsgestell aufgeschobenen Fahrgerätes,
Fig. 3
in vergrößertem Maßstab die Seitenansicht des vorderen Teils des Fahrgerätes nach Fig. 1,
Fig. 4
eine Teilunteransicht des Fahrgerätes in Richtung der Pfeile IV der Fig. 3,
Fig. 5
einen Schnitt entlang der Linie V-V der Fig. 4,
Fig. 6
wie Fig. 4 eine Teilunteransicht des vorderen Teils des Fahrgerätes bei am hinteren Ende ihres Verschiebungsweges befindlichen Aufsetzrollen,
Fig. 7
eine Seitenansicht des zusammengeklappten, auf dem Tragenlagerungsgestell befindlichen Fahrgerätes und
Fig. 8
einen Schnitt entlang der Linie VIII-VIII der Fig. 7.
An exemplary embodiment of the invention is explained in more detail below with reference to the figures. In detail show:
Fig. 1
a side view of the driving device with stretcher thereon,
Fig. 2
a side view of the driving device partially pushed onto the stretcher support frame,
Fig. 3
on an enlarged scale the side view of the front part of the driving device according to FIG. 1,
Fig. 4
2 shows a partial bottom view of the driving device in the direction of arrows IV in FIG. 3,
Fig. 5
4 shows a section along the line VV of FIG. 4,
Fig. 6
4 shows a partial bottom view of the front part of the driving device with the placement rollers located at the rear end of its displacement path,
Fig. 7
a side view of the folded, located on the stretcher rack and
Fig. 8
a section along the line VIII-VIII of Fig. 7th

Fig. l zeigt das Fahrgerät mit einer darauf befindlichen Krankentrage und nach unten geschwenkten arretierten Beinen. Das Fahrgerät weist einen Rahmen 10 auf, der aus zwei im Querschnitt runden Längsholmen 12 (in den Figuren ist nur ein Längsholm dargestellt), einem vorderen Querholm 14 und einem hinteren Querholm 16 besteht. Parallel zu den Längsholmen 12 verläuft eine Hohlprofilleiste 18, deren beiden Enden mit den Querholmen 14 und 16 verbunden sind. Die Hohlprofilleiste weist zwei parallel zu den Längsholmen 12 verlaufende im Querschnitt im wesentlichen kreisförmige Kanäle 20 und 22 auf, die nach unten geöffnet sind. In den Kanälen 20 und 22 sind, wie weiter unten beschrieben wird, mehrere Gleitkörper in Form von kurzen Rohren verschiebbar gehalten. Die Kanäle weisen jeweils ein sich über einen Winkelbereich von ca. 270° erstreckende geschlossene Wandung auf, so daß die Gleitkörper unverlierbar gehalten werden.Fig. L shows the driving device with a stretcher thereon and locked legs pivoted down. The driving device has a frame 10 which consists of two longitudinal bars 12 which are round in cross section (only one longitudinal bar is shown in the figures), a front transverse bar 14 and a rear transverse bar 16 exists. A hollow profile strip 18 runs parallel to the longitudinal spars 12, the two ends of which are connected to the transverse spars 14 and 16. The hollow profile strip has two channels 20 and 22 which are essentially circular in cross section and run parallel to the longitudinal bars 12 and are open at the bottom. In the channels 20 and 22, as described further below, a plurality of sliding bodies in the form of short tubes are slidably held. The channels each have a closed wall which extends over an angular range of approximately 270 °, so that the sliding bodies are held captively.

An dem Rahmen 10 sind zwei vordere Beine 24 und zwei hintere Beine 26 drehbar gelagert, von denen jeweils nur ein Bein in den Zeichnungen dargestellt ist. Die hinteren Beine 26 sind unmittelbar an den Längsholmen 12 über Gelenke 28 angelenkt. An ihren Enden befindet sich je eine gabelförmige Halterung 30, an der eine Laufrolle 32 drehbar gelagert ist. Die Halterungen 30 sind um eine vertikale Achse 34 drehbar an den Beinen 26 befestigt. Die Laufrollen 32 sind also die Lenkrollen des Fahrgerätes.On the frame 10, two front legs 24 and two rear legs 26 are rotatably supported, of which only one leg is shown in the drawings. The rear legs 26 are articulated directly on the longitudinal spars 12 via joints 28. At each end there is a fork-shaped holder 30 on which a roller 32 is rotatably mounted. The brackets 30 are rotatably attached to the legs 26 about a vertical axis 34. The rollers 32 are thus the steering rollers of the driving device.

Die beiden hinteren Beinen 26 sind durch eine Querstrebe 35 miteinander verbunden. An der Querstrebe 35 sind Stützstreben 36 drehbar befestigt. Die beiden freien Enden der Stützstreben 36 sind über eine Achse 37 verbunden, die mit einem in dem Kanal 22 der Hohlprofilleiste 18 befindlichen Gleitkörper 38 verbunden ist. An den beiden Enden der Achse 37 ist jeweils eine Stützrolle 40 befestigt, die von unten an den Längsholmen 12 anliegen und sich beim Verschwenken der hinteren Beine 26 auf den Längsholmen 12 abrollen. Der Gleitkörper 38 ist über eine im einzelnen nicht dargestellte Arretiervorrichtung in dem Kanal 22 separat arretierbar und lösbar. Die Arretiervorrichtung wird über einen Hebel am hinteren Ende des Rahmens 10 betätigt.The two rear legs 26 are connected to one another by a cross strut 35. Support struts 36 are rotatably attached to the cross strut 35. The two free ends of the support struts 36 are connected via an axis 37 which is connected to a sliding body 38 located in the channel 22 of the hollow profile strip 18. At each of the two ends of the axis 37, a support roller 40 is fastened, which rest against the longitudinal spars 12 from below and roll on the longitudinal spars 12 when the rear legs 26 are pivoted. The Sliding body 38 can be separately locked and detached in the channel 22 via a locking device (not shown in detail). The locking device is operated via a lever at the rear end of the frame 10.

An den unteren Enden der beiden vorderen Beine 24 ist jeweils eine gabelförmige Halterung 42 fest angebracht, die eine Laufrolle 44 drehbar hält. Die beiden oberen Enden der vorderen Beine 24 sind über eine zum Rahmen 10 querverlaufende Achse 45 verbunden, an deren beiden Enden jeweils eine Stützrolle 46 angeordnet ist, die an den unteren Seiten der Längsholme 12 anliegt. Die Achse der beiden Stützrollen 46 ist mit einem Gleitkörper 48 verbunden, der in dem Kanal 20 der Hohlprofilleiste 18 verschiebbar angeordnet ist. Die beiden vorderen Beine sind über eine Querstrebe 49 miteinander verbunden, mit der wiederum zwei Stützstreben 50 gelenkig verbunden sind. Die beiden Stützstreben 50 sind genauso wie die beiden Stützstreben 36 für die hinteren Beine 26 über eine querverlaufende Achse 51 (Fign. 4 und 6) mit einem zweiten Gleitkörper 52 verbunden, der in dem Kanal 20 unverlierbar und längsverschiebbar gehalten ist. An den Enden der die beiden Stützstreben 50 verbindenden Achsen ist jeweils eine Stützrolle 54 drehbar gelagert, die genauso wie die Stützrollen 46 und 40 von unten an den Längsholmen 12 anliegen.At the lower ends of the two front legs 24, a fork-shaped holder 42 is fixedly attached, which rotatably holds a roller 44. The two upper ends of the front legs 24 are connected via an axis 45 extending transversely to the frame 10, at the two ends of which a support roller 46 is arranged, which abuts on the lower sides of the longitudinal spars 12. The axis of the two support rollers 46 is connected to a sliding body 48 which is slidably arranged in the channel 20 of the hollow profile strip 18. The two front legs are connected to one another via a cross strut 49, with which in turn two support struts 50 are connected in an articulated manner. The two support struts 50, like the two support struts 36 for the rear legs 26, are connected via a transverse axis 51 (FIGS. 4 and 6) to a second sliding body 52, which is held captively in the channel 20 and can be moved longitudinally. At the ends of the axes connecting the two support struts 50, a support roller 54 is rotatably supported, which, like the support rollers 46 and 40, abuts against the longitudinal spars 12 from below.

Der zweite Gleitkörper 52 ist durch eine Arretiervorrichtung in dem Kanal 20 der Hohlprofilleiste 18 verriegelbar. Die Arretiervorrichtung besteht aus einer parallel zu den Kanälen 20 und 22 verlaufenden und in der Hohlprofilleiste 18 drehbar gehaltenen Stange 55 (Fig. 4), an deren hinteren Ende ein (nicht dargestellter) Betätigungshebel angeordnet ist, der sich unterhalb der hinteren Querstrebe 16 des Rahmens 10 befindet und von Hand betätigbar ist. An dem vorderen Ende der Stange 55 ist ein Verriegelungshaken 58 befestigt. Bei verriegeltem zweiten Gleitkörper 52 ist der Verriegelungshaken 58 in eine Ausnehmung 60 im zweiten Gleitkörper 52 eingetaucht. Die Stange 55 ist derart vorgespannt, daß sich der Verriegelungshaken 58 bei nicht betätigtem Betätigungshebel in der Verriegelungsposition zum Verriegeln des Gleitkörpers befindet. Beim Betätigen der Stange 55 wird diese gegen die Kraft der Vorspannung verdreht.The second sliding body 52 can be locked by a locking device in the channel 20 of the hollow profile strip 18. The locking device consists of a rod 55 (FIG. 4), which runs parallel to the channels 20 and 22 and is rotatably held in the hollow profile strip 18, at the rear end of which a (not shown) Operating lever is arranged, which is located below the rear cross strut 16 of the frame 10 and is operable by hand. A locking hook 58 is attached to the front end of the rod 55. When the second sliding body 52 is locked, the locking hook 58 is immersed in a recess 60 in the second sliding body 52. The rod 55 is biased in such a way that the locking hook 58 is in the locking position for locking the sliding body when the operating lever is not actuated. When the rod 55 is actuated, it is rotated against the force of the pretension.

Zwischen dem zweiten Gleitkörper 52 und dem vorderen mit der Querstrebe 14 verbundenen Ende der Hohlprofilleiste 18 befindet sich ein erster Gleitkörper 56, der wie der zweite Gleitkörper 52 in dem Kanal 20 verschiebbar und arretierbar gehalten ist. Der erste Gleitkörper 56 ist mit einer Muffe 59 verbunden, an der eine zum Rahmen 10 querverlaufende Achse 60 befestigt ist. Die Achse 60 verläuft unterhalb des Rahmens 10 und ragt zu beiden Seiten über die Längsholme 12 über (Fig. 5). An der Achse 60 sind zwei Stützrollen 62 drehbar gelagert, die von unten an den Längsholmen 12 anliegen und sich auf diesen beim Verschieben der Achse 60 abrollen. Jede Stützrolle 62 weist zu beiden Seiten einen Spurkranz 64 auf, und die Ausbildung der Lauffläche ist den runden Längsholmen 12 angepaßt. Durch die beiden Spurkränze 64 und die spezielle Ausbildung der Laufflächen der Stützrollen 62 sind diese gegen Ssitenbewegungen gesichert, so daß sie stets von unten an den Längsholmen 12 anliegen.Between the second sliding body 52 and the front end of the hollow profile strip 18, which is connected to the cross strut 14, there is a first sliding body 56 which, like the second sliding body 52, is held in the channel 20 so as to be displaceable and lockable. The first sliding body 56 is connected to a sleeve 59, to which an axis 60 extending transversely to the frame 10 is fastened. The axis 60 runs below the frame 10 and projects on both sides over the longitudinal spars 12 (FIG. 5). On the axis 60, two support rollers 62 are rotatably mounted, which bear against the longitudinal spars 12 from below and roll on them when the axis 60 is moved. Each support roller 62 has a flange 64 on both sides, and the design of the tread is adapted to the round longitudinal spars 12. Due to the two flanges 64 and the special design of the treads of the support rollers 62, these are secured against side movements, so that they always rest against the longitudinal spars 12 from below.

An den beiden seitlich über die Längsholme 12 überstehenden Enden der Achse 60 ist jeweils eine gabelförmige Halterung 66 befestigt, deren Öffnung nach unten gerichtet ist. In den Halterungen 66 ist jeweils eine Aufsetzrolle 68 drehbar gehalten. Über die Aufsetzrollen 68 liegt das Fahrgerät beim Hineinschieben in das Krankentransportfahrzeug auf dem Tragenlagerungsgestell auf, welches in den Zeichnungen mit den Bezugzeichen 70 angedeutet ist. Dadurch, daß die mit den Halterungen 66 für die Aufsetzrollen 68 verbundene Achse 60 über die Stützrollen 62 an den Längsholmen 12 und über den Gleitkörper 56 in der Hohlprofilleiste 18 gelagert ist, sind die Aufsetzrollen 68 in ihrer Position relativ zum Rahmen 10 längsverschiebbar.At the two ends of the axis 60 projecting laterally beyond the longitudinal spars 12, a fork-shaped holder 66 is fastened, the opening of which is directed downward. A mounting roller 68 is rotatably held in the brackets 66. The driving device rests on the stretcher support frame when it is pushed into the patient transport vehicle, which is indicated in the drawings by the reference number 70, via the placement rollers 68. Characterized in that the axis 60 connected to the brackets 66 for the placement rollers 68 is supported by the support rollers 62 on the longitudinal spars 12 and by the sliding body 56 in the hollow profile strip 18, the placement rollers 68 are longitudinally displaceable in their position relative to the frame 10.

Auf dem Rahmen 10 des Fahrgerätes liegt die Krankentrage 72 auf. Die Krankentrage 72 weist zwei Längsholme 74 auf, an denen jeweils zwei gabelförmige nach unten geöffnete Halterungen 76 fest angebracht sind. An den Halterungen 76 sind die vier Laufrollen 78 der Krankentrage 72 drehbar gelagert. Die beiden vorderen Halterungen und die beiden hinteren Halterungen sind jeweils durch eine zur Längsrichtung der Krankentrage 72 querverlaufende Stange 79 verbunden, die von oben auf der Hohlprofilleiste 18 und den beiden Längsholmen 12 aufliegt. Die beiden Stangen 79 befinden sich unter von oben auf die Hohlprofilleiste 18 aufgesetzten Niederhaltern 80. Die Krankentrage 72 ist an dem Rahmen 10 in der in den Figuren dargestellten Stellung über einen Verriegelungshaken 82 feststellbar, der über einen Betätigungshebel 84 am hinteren Ende des Rahmens 10 in der Hohlprofilleiste 18 drehbar gelagert ist und durch eine Öffnung nach oben herausragt. Der Verriegelungshaken 82 ist vorteilhafterweise als ein die hintere Stange 79 arretierender Schnäpper ausgebildet, so daß die Krankentrage 72 beim Aufschieben auf den Rahmen 10 automatisch verriegelt wird.The stretcher 72 lies on the frame 10 of the driving device. The stretcher 72 has two longitudinal spars 74, on each of which two fork-shaped holders 76, which are open at the bottom, are firmly attached. The four rollers 78 of the stretcher 72 are rotatably mounted on the brackets 76. The two front brackets and the two rear brackets are each connected by a rod 79 which runs transversely to the longitudinal direction of the stretcher 72 and which rests on the hollow profile strip 18 and the two longitudinal bars 12 from above. The two rods 79 are located below the hold-downs 80 placed on the hollow profile strip 18 from above. The stretcher 72 can be fixed on the frame 10 in the position shown in the figures by means of a locking hook 82 which is actuated by an actuating lever 84 at the rear end of the frame 10 in the hollow profile strip 18 is rotatably supported and protrudes upwards through an opening. The locking hook 82 is advantageously designed as a catch locking the rear rod 79 so that the stretcher 72 is automatically locked when it is pushed onto the frame 10.

Nachfolgend wird die Funktionsweise des Fahrgerätes näher erläutert.The mode of operation of the driving device is explained in more detail below.

Das Fahrgerät wird gemäß Fig. 1 zum Einschieben in das Krankentransportfahrzeug zunächst von hinten gegen das Tragenlagerungsgestell 70 im Krankentransportfahrzeug geschoben. Bei heruntergeschwenkten Beinen 24 und 26 befinden sich die Aufsetzrollen 68 am vorderen Ende des Rahmens 10. Der mit den Aufsetzrollen 68 über die Halterungen 66 und die Achse 60 verbundene erste Gleitkörper 56 ist bei heruntergeschwenkten vorderen Beinen 24 zwischen dem vorderen Ende der Hohlprofilleiste 18 und dem zweiten Gleitkörper 52 fest eingeschlossen. Bei arretierten vorderen Beinen 24 ist der mit den Stützstreben 50 für die vorderen Beine verbundene zweite Gleitkörper 52 in dem Kanal 20 der Hohlprofilleiste 18 durch den Verriegelungshaken 58 arretiert. Damit ist auch der eingeschlossenen erste Gleitkörper 56 unbeweglich, so daß die Aufsetzrollen 68 am vorderen Ende des Rahmens 10, d.h. am vorderen Ende ihres Verschiebungsweges gegen Verschiebungen gesichert sind (s. Fign. 1, 3 und 4).According to FIG. 1, the driving device is first pushed from behind against the stretcher support frame 70 in the patient transport vehicle for insertion into the patient transport vehicle. When the legs 24 and 26 are pivoted down, the mounting rollers 68 are located at the front end of the frame 10. The first sliding body 56 connected to the mounting rollers 68 via the brackets 66 and the axis 60 is when the front legs 24 are pivoted down between the front end of the hollow profile strip 18 and the second sliding body 52 firmly enclosed. When the front legs 24 are locked, the second sliding body 52 connected to the support struts 50 for the front legs is locked in the channel 20 of the hollow profile strip 18 by the locking hook 58. So that the enclosed first sliding body 56 is immovable, so that the placement rollers 68 at the front end of the frame 10, i.e. are secured against displacement at the front end of their displacement path (see FIGS. 1, 3 and 4).

Beim Hineinschieben der Fahrgerätes in das Fahrzeug liegt der Rahmen 10 zunächst über die Aufsetzrollen 68 auf dem Tragenlagerungsgestell 70 auf. Je nach Ausführungsform weist das Tragenlagerungsgestell 70 eine absenkbare Aufnahmeplattform auf, auf der die Aufsetzrollen 68 zunächst laufen. Sobald die Aufsetzrollen 68 auf dem Tragenlagerungsgestell 70 aufliegen, kann von dem Sanitäter über einen (nicht dargestellten) Hebel am hinteren Ende des Rahmens 10 die Arretiervorrichtung für den zweiten Gleitkörper 52 gelöst werden. Das Fahrgerät, das jetzt nicht mehr über die vorderen Beine 24 abgestützt wird, stützt sich dann über die Aufsetzrollen 68 auf dem Tragenlagerungsgestell 70 und über die hinteren Beine 26, die weiterhin am Rahmen 10 arretiert sind, auf dem Boden ab. Das sichere Aufliegen des Fahrgerätes auf dem Tragenlagerungsgestell 70 bei entriegelten vorderen Beinen 24 wird dadurch erreicht, daß der Abstand zwischen den Aufsetzrollen 68 und den vorderen Stützstreben 50 relativ groß ist, was durch die Anordnung der Aufsetzrollen am vorderen Ende des Rahmens 10 zu Beginn des Aufschiebens des Fahrgerätes auf das Tragenlagerungsgestell 70 gewährleistet ist.When the driving device is pushed into the vehicle, the frame 10 initially rests on the stretcher support frame 70 via the placement rollers 68. Depending on the embodiment, the stretcher support frame 70 has a lowerable receiving platform on which the placement rollers 68 initially run. As soon as the placement rollers 68 rest on the stretcher support frame 70, from the medic can be released via a (not shown) lever at the rear end of the frame 10, the locking device for the second sliding body 52. The driving device, which is now no longer supported by the front legs 24, is then supported on the floor by the support rollers 68 on the stretcher support frame 70 and by the rear legs 26, which are still locked on the frame 10. The safe resting of the driving device on the stretcher support frame 70 with unlocked front legs 24 is achieved in that the distance between the placement rollers 68 and the front support struts 50 is relatively large, which is due to the arrangement of the placement rollers at the front end of the frame 10 at the beginning of the sliding of the driving device on the stretcher support frame 70 is guaranteed.

Beim weiteren Hineinschieben des Fahrgerätes in das Transportfahrzeug stoßen die vorderen Stützstreben 50 gegen die hintere Kante des Tragenlagerungsgestells 70. Dabei verschieben sich die Stützstreben 50 relativ zum Rahmen 10, wobei sich die Stützrollen 54 auf der Unterseite der Längsholme 12 abrollen. Infolge der Verschiebung der vorderen Stützstreben 50 verschwenken diese die vorderen Beine 24 bis unter den Rahmen 10. Beim Verschwenken der vorderen Beine 24 ist der zweite Gleitkörper 52 entriegelt, womit auch der erste Gleitkörper 56 nicht mehr am Hohlprofil 18 arretiert ist. Daher können sich die Aufsetzrollen 68 relativ zum Rahmen vom vorderen Ende des Rahmens 10 weg in Richtung auf die vorderen Beine 24 längsverschieben, während sie auf dem Tragenlagerungsgestell 70 laufen. Sobald die hintere Kante des Tragenlagerungsgestells 70 beim weiteren Hineinschieben des Fahrgerätes in das Transportfahrzeug gegen die hinteren Beine 26 stoßen, werden diese durch Lösen der den Gleitkörper 38 der hinteren Stützstreben 36 arretierenden separaten Arretiervorrichtung entriegelt. Damit werden auch die hinteren Beine 26 nach oben bis unter den Rahmen 10 hochgeschwenkt, und das gesamte Fahrgerät befindet sich schließlich mit hochgeklappten Beinen auf dem Tragenlagerungsgestell. Die Aufsetzrollen 68 stoßen gegen am vorderen Ende des Tragenlagerungsgestells hochstehend angeordnete Anschläge 85, die die Aufsetzrollen 68 "fangen" und beim Hineinschieben des Fahrgerätes in das Transportfahrzeug relativ zum Rahmen an diesen zurückschieben. Anstelle der Anschläge 85 können auch Sperrteile vorgesehen sein, die an Anschläge an den Halterungen 66 der Aufsetzrollen 68 oder an der Achse 60 angreifen. Die Richtungen, in die sich die vorderen und die hinteren Beine verschwenken bzw. die vorderen und die hinteren Stützstreben verschwenken bzw. die vorderen und die hinteren Stützstreben sowie die Aufsetzrollen verschieben, sind in Fig. 2 durch Pfeile angedeutet.When the driving device is pushed further into the transport vehicle, the front support struts 50 abut against the rear edge of the stretcher support frame 70. The support struts 50 move relative to the frame 10, the support rollers 54 rolling on the underside of the longitudinal spars 12. As a result of the displacement of the front support struts 50, they pivot the front legs 24 to below the frame 10. When the front legs 24 are pivoted, the second sliding body 52 is unlocked, with the result that the first sliding body 56 is also no longer locked on the hollow profile 18. Therefore, the landing rollers 68 can slide longitudinally relative to the frame away from the front end of the frame 10 toward the front legs 24 while running on the stretcher support frame 70. As soon as the rear edge of the stretcher support frame 70 bumps against the rear legs 26 when the driving device is pushed further into the transport vehicle this unlocks by releasing the separate locking device which locks the sliding body 38 of the rear support struts 36. This also swings the rear legs 26 up to below the frame 10, and the entire driving device is finally on the stretcher support frame with its legs folded up. The placement rollers 68 abut against stops 85 arranged upright at the front end of the stretcher support frame, which "catch" the placement rollers 68 and push them back onto the transport vehicle relative to the frame when the driving device is pushed into the latter. Instead of the stops 85, locking parts can also be provided which engage stops on the holders 66 of the mounting rollers 68 or on the axle 60. The directions in which the front and rear legs pivot or the front and rear support struts pivot or the front and rear support struts and the mounting rollers move are indicated in FIG. 2 by arrows.

Die Position, in der sich die Aufsetzrollen 68 bei vollständig auf dem Tragenlagerungsgestell 70 aufliegendem Fahrgerät befinden, ist in den Fign. 6 und 7 dargestellt. Die Aufsetzrollen 68 befinden sich am vorderen Ende des Tragenlagerungsgestells 70 und in bezug auf den Rahmen unmittelbar unter den vorderen Laufrollen 78 der Krankentrage 72. Das heißt, daß sich die Aufsetzrollen 68 beim Hineinschieben des Fahrgerätes in das Transportfahrzeug vom vorderen Ende des Rahmens 10 bis in Höhe der vorderen Laufrollen 78 der Krankentrage 72 relativ zum Rahmen 10 bis zum hinteren Ende ihres Verschiebungsweges verschoben haben. Die Aufsetzrollen 68 befinden sich also genau an der Position, an der sich auch die vorderen Laufrollen 78 der Krankentrage 72 befinden, wenn diese ohne Fahrgerät auf das Tragenlagerungsgestell 70 geschoben ist. Das Tragenlagerungsgestell 70 braucht also für das Fahrgerät nicht verändert bzw. verlängert zu werden.The position in which the placement rollers 68 are located when the driving device is completely resting on the stretcher support frame 70 is shown in FIGS. 6 and 7. The placement rollers 68 are located at the front end of the stretcher support frame 70 and in relation to the frame immediately below the front rollers 78 of the stretcher 72. This means that the placement rollers 68 move from the front end of the frame 10 to when the driving device is pushed into the transport vehicle Height of the front rollers 78 of the stretcher 72 have moved relative to the frame 10 to the rear end of their displacement path. The placement rollers 68 are so exactly on the Position at which the front rollers 78 of the stretcher 72 are also when the stretcher 72 is pushed onto the stretcher support frame 70 without a driving device. The stretcher support frame 70 does not need to be changed or extended for the driving device.

In der in den Fign. 6 und 7 dargestellten Position der Aufsetzrollen 68 ist der erste Gleitkörper 56 durch den Verriegelungshaken 58 verriegelt, der zuvor bei heruntergeschwenkten vorderen Beinen den zweiten Gleitkörper 52 der vorderen Stützstreben 50 verriegelt und damit die vorderen Beine 24 am Rahmen arretiert hatte. Der erste Gleitkörper 56 weist eine Ausnehmung 86 auf, in die der Verriegelungshaken 58 bei am hinteren Ende ihres Verschiebungsweges gegen Verschiebungen gesicherten Aufsetzrollen 68 eingetaucht ist. Der zweite Gleitkörper 52 liegt an dem ersten Gleitkörper 56 mit der einen Seite an.In the in Figs. 6 and 7 shown position of the placement rollers 68, the first sliding body 56 is locked by the locking hook 58, which previously locked the second sliding body 52 of the front support struts 50 and thus locked the front legs 24 to the frame when the front legs were swung down. The first sliding body 56 has a recess 86 into which the locking hook 58 is immersed when the placement rollers 68 are secured against displacement at the rear end of their displacement path. The second sliding body 52 abuts the first sliding body 56 on one side.

Die hochgeschwenkten vorderen und hinteren Beine 26,24 werden unter dem Rahmen 10 durch Fanghaken gehalten, die mit den jeweiligen Arretiervorrichtung für die vorderen und die hinteren Beine gekoppelt sind. In den Fign. 7 und 8 ist der Fanghaken 88 für die vorderen Beine 24 dargestellt. Der Fanghaken 88 ragt nach unten aus der Hohlprofilleiste 18 heraus und ist an der Stange 55 befestigt, an der auch der Verriegelungshaken 58 zum Verriegeln des ersten und des zweiten Gleitkörpers 56 bzw. 52 angeordnet ist. Der Fanghaken 88 wird also über die Stange 55 verschwenkt. Er umgreift einen Zapfen 90 an der die beiden vorderen Beine 24 verbindenden Querstrebe 49. Der Zapfen 90 verläuft parallel zu den vorderen Beinen 24. Über den den Zapfen 90 umschließenden Fanghaken 88 werden die vorderen Beine unter dem Rahmen 10 gehalten bzw. "gefangen".The swung up front and rear legs 26, 24 are held under the frame 10 by catch hooks which are coupled to the respective locking device for the front and rear legs. In Figs. 7 and 8, the catch hook 88 for the front legs 24 is shown. The catch hook 88 protrudes downward from the hollow profile strip 18 and is fastened to the rod 55, on which the locking hook 58 for locking the first and second sliding bodies 56 and 52 is also arranged. The catch hook 88 is thus pivoted over the rod 55. It engages around a pin 90 on the cross strut 49 connecting the two front legs 24. The pin 90 runs parallel to the front legs 24. About the pin 90 surrounding catch hook 88, the front legs are held or "caught" under the frame 10.

Beim Herausziehen des Fahrgerätes aus dem Transportfahrzeug werden beim Entriegeln des ersten Gleitkörpers 56 durch Drehen der Stange 55 auch die vorderen Beine 24 freigegeben. Die vorderen Beine 24 fallen aufgrund ihres Eigengewichts beim Herausziehen des Fahrgerätes nach unten. Der letzte Teil dieser Schwenkbewegung wird durch eine zwischen dem zweiten Gleitkörper 52 und dem vorderen Ende der Hohlprofilleiste 18 angeordnete Zugfeder unterstützt, die den zweiten Gleitkörper 52 bis in dessen Ausgangsposition zurückbewegt. Die Zugfeder ist in Fig. 6 schematisch durch die strichpunktierte Linie 92 angedeutet. Eine Zugfeder ist auch zwischen dem ersten Gleitkörper 56 und dem vorderen Ende der Hohlprofilleiste 18 angeordnet. Sie ist ebenfalls schematisch durch die strichpunktierte Linie 94 der Fig. 6 angedeutet. Die Zugfeder 94 bewegt den Gleitkörper 56 beim Herausziehen des Fahrgerätes aus dem Transportfahrzeug in seine Ausgangsposition, in der sich die Aufsetzrollen 68 am vorderen Ende ihres Verschiebungsweges, d.h. am vorderen Ende des Rahmens 10 befinden. Die Aufsetzrollen 68 werden also einerseits beim Herabschwenken der vorderen Beine 24 durch den zweiten Gleitkörper 52, der gegen den ersten Gleitkörper 56 stößt und diesen in Richtung auf das vordere Ende der Hohlprofilleiste 18 bewegt, und andererseits durch die Zugfeder 94, die beim Hineinschieben des Fahrgerätes in das Krankentransportfahrzeug gespannt worden ist, zurückbewegt. Bei herabgeschwenkten vorderen Beinen 24 ist der Verriegelungshaken 58 wieder in die Ausnehmung 60 des zweiten Gleitkörpers 52 eingetaucht, wodurch dieser und damit die vorderen Beine arretiert sind. Für den Fall, daß sich die vorderen Beine beim Herausziehen des Fahrgerätes infolge eines zu geringen Abstandes vom Rahmen 10 zum Boden nicht vollständig verschwenken, sind in dem zweiten Gleitkörper 52 mehrere Ausnehmungen 60 und 60a,60b vorgesehen. In eine dieser Ausnehmungen wird der Verriegelungshaken 58 in jedem Fall eintauchen und damit den Gleitkörper 52, d.h. die vorderen Beine verriegeln.When the driving device is pulled out of the transport vehicle, the front legs 24 are also released when the first sliding body 56 is unlocked by turning the rod 55. The front legs 24 fall down due to their own weight when pulling out the driving device. The last part of this pivoting movement is supported by a tension spring arranged between the second sliding body 52 and the front end of the hollow profile strip 18, which moves the second sliding body 52 back into its starting position. The tension spring is indicated schematically in FIG. 6 by the dash-dotted line 92. A tension spring is also arranged between the first sliding body 56 and the front end of the hollow profile strip 18. It is also indicated schematically by the dash-dotted line 94 in FIG. 6. The tension spring 94 moves the sliding body 56 when the driving device is pulled out of the transport vehicle into its starting position, in which the placement rollers 68 are located at the front end of their displacement path, ie at the front end of the frame 10. The placement rollers 68 are thus on the one hand when the front legs 24 are swung down by the second sliding body 52, which abuts the first sliding body 56 and moves it in the direction of the front end of the hollow profile strip 18, and on the other hand by the tension spring 94, which when the driving device is pushed in has been stretched back into the ambulance. When the front legs 24 are pivoted down, the locking hook 58 is again immersed in the recess 60 of the second sliding body 52, as a result of which this and thus the front legs are locked. In the event that the front legs do not pivot completely when the driving device is pulled out due to an insufficient distance from the frame 10 to the floor, a plurality of recesses 60 and 60a, 60b are provided in the second sliding body 52. In any case, the locking hook 58 will dip into one of these recesses and thus lock the sliding body 52, ie lock the front legs.

Das Fahrgerät kann auch, auf den Beinen stehend, in eine Schocktieflage gebracht werden. Dazu muß eine (nicht dargestellte) an den Gleitkörper 48 der vorderen Beine 24 angreifende Arreitervorrichtung gelöst werden, die über einen Hebel am vorderen Ende des Rahmens 10 betätigbar ist. Bei gelöster Arretiervorrichtung verschwenken sich die vorderen Beine 24 relativ zum Rahmen 10 und den vorderen Stützstreben 50, wobei sich die Stützrollen 46 auf der Unterseite der Längsholme 12 abrollen. Die vorderen Beine 24 bewegen sich ein Stück auf die hinteren Beine 26 zu, wodurch sich das vordere Ende des Rahmens absenkt. Die vorderen Beine 24 lassen sich bei abgesenktem Fahrgerät über den Gleitkröper 48 am Rahmen 10 arretieren.The driving device can also be brought to a shock low position, standing on its feet. For this purpose, an Arider device (not shown) which engages the sliding body 48 of the front legs 24 must be released and can be actuated via a lever at the front end of the frame 10. When the locking device is released, the front legs 24 pivot relative to the frame 10 and the front support struts 50, the support rollers 46 rolling on the underside of the longitudinal bars 12. The front legs 24 move a little toward the rear legs 26, thereby lowering the front end of the frame. The front legs 24 can be locked on the frame 10 via the sliding body 48 when the driving device is lowered.

Claims (14)

  1. Carriage for an ambulance stretcher, having a frame, front and rear legs being articulated to the frame and adapted to be arrested, and two entry rollers at the front end of the frame,
    characterized in that
    the entry rollers (68) are guided at the frame (10) to be displaced in lengthwise direction and at the front end of the sliding path can be locked with regard to the frame (10) by an arresting means (55, 58).
  2. Carriage according to claim 1, characterized in that the arresting means (55, 58) is coupled with an arresting means for locking the front legs (24).
  3. Carriage according to claim 1, characterized in that the arresting means (55, 58) in the locked condition secures the entry rollers (68) against sliding movement and the front legs (24) against swivelling movement at the same time.
  4. Carriage according to claim 1, characterized in that the entry rollers (68) are safeguarded against sliding movement at the front end of the sliding path when the front legs (24) have been swivelled downwardly and are safeguarded against sliding movement at the rear end of the sliding path when the front legs (24) have been swivelled up to the frame (10).
  5. Carriage according to claim 1, characterized in that the entry rollers (68) are resiliently biased towards the front end of the sliding path.
  6. Carriage according to claim 1, characterized in that the entry rollers (68) are rotatably mounted at both ends of an axle (60) extending transversely to the frame (10), said axle (60) being connected to a first sliding member (56) which is guided to be displaced in a hollow profile strip (18) extending lengthwise to the frame (10) and can be locked by the arresting means (55, 58).
  7. Carriage according to claim 1, characterized in that the frame (10) is provided with two longitudinal bars (12) on which the entry rollers (68) are borne from below by support rollers (62).
  8. Carriage according to claim 6, characterized in that supporting rods (50) are pivotably mounted to the front legs (24), which supporting rods (50) are movably connected to a second sliding member (52) which is displaceable in the hollow profile strip (18) and can be locked by the arresting means (55, 58).
  9. Carriage according to claim 8, characterized in that the arresting means (55, 58) locks the second sliding member (52) when the front legs (24) have been swivelled downwardly and locks the first sliding member (56) connected to the entry rollers (68) when the front legs (24) have been swivelled up to the frame (10).
  10. Carriage according to claim 1, characterized in that the first sliding member (56) abuts the second sliding member (52) and the front end of the hollow profile strip (18) when the front legs (24) have been swivelled downwardly and arrested and that the second sliding member (52) abuts the first sliding member (56) when the front legs (24) have been swivelled up to the frame (10).
  11. Carriage according to claim 1, characterized in that the front legs (24) have supporting rods (50) pivotably mounted thereto which are connected to the entry rollers (68).
  12. Carriage according to claim 1, characterized in that the supporting rods (50) are pivotably mounted at the first sliding member (56).
  13. Carriage according to claim 1, characterized in that the entry rollers (68) are connected to a stop element which cooperates with a locking member arranged at a stretcher support rack, said locking member preventing motion of the entry rollers (68) back towards the front end of the sliding path.
  14. Carriage according to claim 1, characterized in that the arresting means is provided with a rod (55) which extends parallel to the hollow profile strip (18), being pivotably supported and resiliently biased towards the locked condition, a radially projecting operating lever being fastened at the end of said rod (55) at the rear end of the frame (10) and a locking hock (58) being fastened at the other end of said rod (55).
EP88116725A 1987-10-15 1988-10-08 Vehicle for stretcher Expired - Lifetime EP0311936B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88116725T ATE70965T1 (en) 1987-10-15 1988-10-08 MOBILE FOR A STRETCHER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3734902A DE3734902C1 (en) 1987-10-15 1987-10-15 Carriage for a stretcher
DE3734902 1987-10-15

Publications (2)

Publication Number Publication Date
EP0311936A1 EP0311936A1 (en) 1989-04-19
EP0311936B1 true EP0311936B1 (en) 1992-01-02

Family

ID=6338383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116725A Expired - Lifetime EP0311936B1 (en) 1987-10-15 1988-10-08 Vehicle for stretcher

Country Status (4)

Country Link
US (1) US4921295A (en)
EP (1) EP0311936B1 (en)
AT (1) ATE70965T1 (en)
DE (2) DE3734902C1 (en)

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Also Published As

Publication number Publication date
ATE70965T1 (en) 1992-01-15
EP0311936A1 (en) 1989-04-19
US4921295A (en) 1990-05-01
DE3867412D1 (en) 1992-02-13
DE3734902C1 (en) 1989-04-13

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