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
sliding
legs
rollers
carriage
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 fur Sanitatsausruestungen Hans Stollenwerk & Cie & Co GmbH
Original Assignee
Stollenwerk Fabrik fur Sanitatsausruestungen Hans Stollenwerk & Cie & Co GmbH
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
Priority to DE3734902 priority Critical
Priority to DE3734902A priority patent/DE3734902C1/en
Application filed by Stollenwerk Fabrik fur Sanitatsausruestungen Hans Stollenwerk & Cie & Co GmbH filed Critical Stollenwerk Fabrik fur Sanitatsausruestungen Hans Stollenwerk & Cie & Co GmbH
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

Description

  • 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).
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 mode of operation of the driving device is explained in more detail below.
  • 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).
  • 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.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • 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 (2)

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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT88116725T AT70965T (en) 1987-10-15 1988-10-08 Riding unit for a health carrier.

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) AT70965T (en)
DE (1) DE3734902C1 (en)

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Also Published As

Publication number Publication date
US4921295A (en) 1990-05-01
EP0311936A1 (en) 1989-04-19
DE3734902C1 (en) 1989-04-13
AT70965T (en) 1992-01-15

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