EP0035123B1 - Stretcher support - Google Patents

Description

The invention relates to a stretcher platform or a stretcher support frame for the fixable holding of stretchers with U-shaped upwardly open guide rails and each associated with a guide rail and each guide rail adjustable locking members, which are arranged on the stretcher and insertable into the guide rails in cooperation with each Secure the assigned guide rail in a form-fitting manner against inadmissible relative movement in the direction of all three spatial axes, even with different longitudinal spacing of the feet.

In a stretcher platform known from DE-C-1 170115, the locking members are arranged as radial swivel arms on a common shaft, which in turn extends parallel to a guide rail and is rotatably mounted thereon. By adjusting the locking elements in the longitudinal direction of the shaft or by arranging the locking elements in a corresponding multiple arrangement, stretchers with different longitudinal spacing of the feet can be locked. Indications of stretchers with different foot spacing in the transverse direction, d. H. with different track width, are missing as well as references to stretchers with different foot shapes. Accordingly, nothing is said in this document about how a stretcher platform or a stretcher support frame can be adapted to such different stretchers. For the rest, the locking elements arranged on a shaft are only able to arrest the support feet located in each of the guide rails. If the stretcher feet are to be locked in both rails, a corresponding double arrangement would have to be carried out, so that the stretcher feet in the right and left rails would be locked or unlocked separately from one another by two operations.

DE-C-1 068 426 addresses the problem of stretchers with different track gauges. First, it is shown that the arrangement of guide rails of different widths for accommodating stretches of different track widths is disadvantageous if the track width cannot be adjusted. It is therefore proposed in this publication to change the track width of the guide rails by inserting additional guide elements into the guide track in accordance with the track widths of the stretchers. Although it is mentioned that the additional guide elements can, if appropriate, be arranged in fixed locations on the guide rails that are not touched by the different width stretchers in the longitudinal direction and in the end position, it is however not explained in more detail how this concept could actually be realized in a constructive manner. Rather, the drawing describes essentially movable or adjustable guide elements by reverse assembly. As such, serve in particular around a transverse axis of the stretcher foldable rail ends, which extend the guide rails in one position and shorten the guide rails in their other position as stops, on which, if necessary, stop or locking elements interacting with support foot parts can also be arranged. In addition, in the area of the end of the stretcher platform, which is used to place or slide the stretcher, a guide element which can be pivoted about a vertical axis can be arranged, which reduces its track width in its position parallel to the longitudinal axis of the stretcher platform and in its position approximately parallel to the transverse axis of the stretcher platform Although the stretcher can be put on with a larger gauge, it is hindered to the extent that the feet of the stretcher have to be lifted over this guide element when it is placed on the stretcher or when it is removed from the stretcher. How the stretchers are locked on this known stretcher stage is not shown.

The object of the invention is to provide a universal stretcher platform or a stretcher support frame, which in a basic version for a larger part of stretcher types, ie. H. without any adaptation measures to be carried out beforehand.

This object is achieved in a stretcher platform of the type mentioned in that stretcher, whose feet apart from the different longitudinal spacing have a different distance in the transverse direction (track width) and different foot width or shape, can be locked by the guide rails being sufficient for the greatest foot width Rail width, at least one of the guide rails for inserting both the largest and those with the smallest track width is widened accordingly, at one end of the rails narrowing the rail width, interacting with the stretcher stop pieces with wedge-shaped front bevels are firmly arranged, which lock the end area of the rails for the feet wearing a track gauge and release them for the feet of other stretchers with a different gauge, and simultaneously lock the locking elements arranged on both guide rails by means of a common actuating member can be locked and unlocked.

The invention ensures that the stretcher is only pushed onto the stretcher platform or stretcher support device and through the central actuation of the locking elements arranged on both rails can be secured, and without any conversion work on the stretcher or the stretcher storage device, so that different stretches can be used alternately without further notice.

The bolt links arranged several times on the rails enable different foot shapes and arrangements to be taken into account. In particular, all stretchers used within the North Atlantic Pact (NATO) can be used, all of which have bow-like feet, but differ with regard to the spacing of the feet in the longitudinal and transverse directions and the foot widths and shapes. In addition to runners arranged in the manner of runners in the longitudinal direction, those which are arranged in the transverse direction are also arranged as feet on stretchers. In addition, stretchers used in the civil sector, which often have roller feet, can also be used.

With the stop pieces arranged on one end of the stretcher, in addition to different track gauges, different overhang lengths of the parts of the stretches projecting beyond the feet are taken into account. This means that one end of the stretcher - for example head or foot end - always assumes approximately the same target position on the stretcher platform or stretcher support device, regardless of the type of stretcher.

According to a preferred embodiment of the invention, stop pins extending in the longitudinal direction of the rails can be fixedly arranged on one end part of the rails, which overlap foot portions of a type of support that run in the transverse direction of the stretcher when the stretcher is inserted and specify the desired position of other stretches solely by means of a stop. So these stop pins have a double function. On the one hand, they secure one type of stretcher against forward and upward movements, while on the other hand they only secure another type of stretcher against forward movement.

Parts of the support feet behind or overlapping bolt slides or pivotable bolt levers and thus structurally simple mechanical parts can be arranged as bolt members. In order to reduce or block a movement of the locked stretcher, the locking members can preferably carry resilient stop pieces which, when the stretcher is locked, rest against the frame or foot parts thereof in the transverse and / or longitudinal direction and / or from above.

If appropriate, stops are arranged on locking members on one side of the stretcher platform, which seek to push the stretcher sideways in such a way that their feet are pushed on one long side against a side wall of one of the guide rails, so that particularly low transverse mobility can be achieved.

If necessary, in addition to the jointly operable locking members (independent of their actuating member) independent resilient locking members can be arranged, which are engaged or disengaged by their feet when the stretcher is moved longitudinally. This makes it possible to insert or remove any types of stretcher into or out of the guide rails without the stretcher feet being blocked by the automatic locking members.

To deflect them, the automatic locking members preferably have corresponding inclined surfaces which interact with the support feet. In order to prevent the locking members from being deflected in the vertical direction during strong accelerations by the interaction of their inclined surfaces with the foot parts of the stretcher which run obliquely to the vertical, stop pieces are expediently arranged on the locking members which point downwards approximately perpendicular to the deflection direction and which foot parts of the stretcher are from above reach over and secure it against vertical movements.

Locking levers arranged as locking members can be C-shaped or hook-shaped and, in the locking position, protrude through an opening into the guide rails, preferably from the side. If the locking levers are arranged pivotably about an axis running transversely to the longitudinal axis of the rail, they can overlap foot parts arranged transversely to the rail axis in the locking position and at the same time engage behind these or other foot parts, so that several directions of movement are blocked at the same time.

A shaft arranged in the longitudinal direction of the stretcher platform is preferably provided as the common actuating member of the locking members, on which arms articulated with the locking members via push rods are arranged in a rotationally fixed manner. With this construction, it is possible in a simple manner to simultaneously actuate elements arranged several times in the longitudinal direction of the guide rails.

In order to make it easier to put the stretcher on or remove it from the stretcher platform, the guide rails can be arranged as a rocker on a carriage that is longitudinally displaceable in guides fixed to the vehicle, the rocker being arranged on the carriage to extend it, and when the carriage is retracted in the longitudinal direction of the vehicle for removal or The stretcher can be lowered by swiveling it down. In this arrangement, the locking members and their actuator are part of the rocker, d. H. In principle, the actuator and locking members can have the same construction as in the case of fixedly arranged guide rails.

The rocker is lowered or raised by means of or with the support of auxiliary units. For example, a gas pressure spring or a servo motor, e.g. B. an electric servomotor between the carriage and rocker.

• Figur 1 eine Draufsicht auf eine Ausführungsform der erfindungsgemäßen Krankentragenbühne bzw. Tragenlagerungsgestell,
• Figur 2 ein Schnittbild entsprechend der gebrochenen Schnittlinie 11-11 in Fig. 1,
• Figur 3 ein Schnittbild entsprechend der Schnittlinie III-III in Fig. 1,
• Figur 4 eine Draufsicht auf die Einzelheit IV in Fig. 1,
• Figur 5 einen Schnitt entsprechend der Schnittlinie V-V in Fig. 1,
• Figur 6 eine Draufsicht auf die Einzelheit VI in Fig. 1,
• Figur 7 eine Draufsicht auf eine weitere Ausführungsform der erfindungsgemäßen Krankentragenbühne bzw. Tragenlagerungsgestell,
• Figur 8 ein Schnittbild entsprechend der Schnittlinie VIII-VIII in Fig. 7,
• Figur 9 eine Seitenansicht der erfindungsgemäßen Tragenbühne und
• Figur 10 ein Schnittbild entsprechend der Schnittlinie X-X in Fig. 9.

The invention is explained below on the basis of preferred exemplary embodiments which are shown in the drawing are shown. It shows:

• FIG. 1 shows a plan view of an embodiment of the stretcher platform or stretcher support frame according to the invention,
• FIG. 2 shows a sectional view corresponding to broken line 11-11 in FIG. 1,
• 3 shows a sectional view corresponding to the section line III-III in FIG. 1,
• FIG. 4 shows a top view of the detail IV in FIG. 1,
• FIG. 5 shows a section along the section line VV in FIG. 1,
• FIG. 6 shows a top view of detail VI in FIG. 1,
• FIG. 7 shows a plan view of a further embodiment of the stretcher platform or stretcher support frame according to the invention,
• 8 shows a sectional view corresponding to the section line VIII-VIII in FIG. 7,
• Figure 9 is a side view of the stretcher according to the invention and
• 10 shows a sectional view corresponding to the section line XX in FIG. 9.

The stretcher or stretcher support device according to the invention has a stretcher table 1, as shown in plan view in FIG. 1.

This support table 1 consists of two U-shaped guide rails 2 and 3, on the rear end of which a push-on plate 4 is arranged with respect to the direction of insertion of the supports, and which are connected to one another several times by cross members 5. The guide rails 2 and 3 expand conically towards the push-on plate 4, so that the feet of a stretcher placed on the push-on plate can be pushed into the guide rails without difficulty.

The guide rail 2 has a width which is sufficient for the greatest foot width of the stretchers used. The guide rail 3 is also widened so that both stretchers with the smallest track width and stretchers with the largest track width can be inserted into the guide rails. The track width is understood to mean the distance of the stretcher feet in the cross-stringer direction.

Arranged in the front end region of the guide rails 2 and 3 facing away from the slide-on surface 4 are the stop pieces 10 and 11 which narrow the rail width and each have front inclined surfaces 10 'and 11'. The relatively large overhang lengths of stretchers with a small track width can therefore only be pushed up to the inclined surfaces 10 ', stretchers with a maximum track width only up to the inclined surface 11'; and stretchers with a medium track width can be inserted into the narrowed area between the stop pieces 10 and 11 until they strike against stop pins 12 which are arranged at the end of the guide rails 2 and 3 in the longitudinal direction of the rail at a distance from the guide rails.

With certain types of straps, e.g. B. those with transversely to the longitudinal direction of the bow-shaped feet, overlap the stop pin 12 in the transverse direction of the foot parts, so that the stretcher is locked against movements upwards. On the other hand, the stop pins 12 only act as stops, so that only movement of the stretchers in the direction of the stop pins 12 is prevented.

On the guide rails 2 and 3 there are further locking slides 6, 6 'to 6 "' and locking levers 7 to 9, some of which are shown in more detail in FIGS. 2 to 6.

The locking slide 6 to 6 "'and the locking lever 7 are actuated together by means of a shaft 13 by pivoting the handle lever 14. For this purpose, arms 15 are arranged on the shaft 13 in a rotationally fixed manner, which are articulated via push rods 16 with the said locking slides or locking levers 7 and 8. The arms are expediently arranged in such a way that in the locking position of the locking slide 6 to 6 "'or the locking lever 7, 8 they are in a dead center position.

As shown in FIG. 2, the locking slide 6 and 6 'can be retracted by rotating the shaft 13 in the direction of the arrow into a release position, which is shown in broken lines for the locking slide 6', the locking lever 8 also being pivoted outwards into its release position . The locking slide 6 and 6 'move in sleeves 17 and 17', which are arranged laterally on the guide rails 2 and 3.

4 with a T-shaped connecting piece 24, which is pivotally connected to the push rod 16, a stop piece 18 is arranged on the connecting piece 24, which is moved with the locking slide 6 and because of it compared to the Latch slide 6 deeper arrangement, see FIG. 3, with certain types of straps butts laterally against foot portions 19 extending in the longitudinal direction of the stretcher, which are overlapped by the latch slides 6 in the locked position. The locking slide 6 thus together with the bottom surface of the guide rail 2 prevent vertical movement of the foot part 19 and thus the stretcher, while the stop piece 18 together with the opposite vertical wall 3 'of the guide rail 3 prevents a sideways movement of the foot part 19. At the same time, the locking slide 6 can grip in front of or behind vertical foot parts 19 and prevent movement in the longitudinal direction of the rail.

The locking slide 6 "and 6" 'work in the same manner as that described for the locking slide 6 and 6'.

The locking lever 8 is used to secure a journal 20 on stretchers with roller feet. For this purpose, the locking lever 8 has an opening 21, into which the journal 20 when the locking lever 8 is pivoted into the illustrated te latch position is inserted, see Fig. 2nd

In order to ensure that the journal 20 is exactly opposite the opening 21, according to FIGS. 1 and 2 the diagonally opposite locking lever 9 is arranged on the guide rail 2, which in both figures assumes its locking position. This locking lever 9 interacts with the diagonally opposite roller foot of the stretcher and engages behind and over the corresponding journal 20 '.

2 has a throat 22 which is open in the direction of the push-on plate 4, so that the journal 20 'is blocked on the one hand against movement in the direction of the end of the guide rails facing away from the push-on surface 4 and on the other hand against vertical movements.

1 can be seen that the locking lever 9 is deflected against the force of a spring 23 in the direction of the arrow to the outside when stretches with other types of feet are moved longitudinally. The locking lever 9 thus only acts as a lock for stretchers, which have roller feet with journals 20 '.

5 and 6 show the locking lever 7 which can also be seen in FIG. 1, which is C-shaped and is mounted on a bracket 26 arranged on the rail 2 so as to be pivotable about an axis perpendicular to the bottom of the rail 2. This locking lever 7 is pivoted by means of the push rod 16, the broken line showing the release position, while the line with solid lines shows the locking position. In the locking position, the locking lever 7 engages with an angular arm through an opening 27 in the side wall of the guide rail adjacent to the tab 26 and, with its angled end 28, overlaps a foot part 19 'of a stretcher type extending transversely to the longitudinal direction of the rail with bow-like feet arranged in the transverse direction of the stretcher. At the same time, the locking lever 7 engages behind a vertical foot part 19 ", so that the stretcher cannot slide backwards from the table 1. In the front feet of this stretcher, the abovementioned stop pins 12 engage, which prevent this type of carrier from moving vertically and moving forward .

In the modified embodiment according to FIGS. 7 and 8, the locking slides 6 "and 6" 'shown in FIG. 1, which are actuated simultaneously via the shaft 13, are replaced by automatically acting resilient locking levers 29 and 29', the locking levers 29 being open are arranged between the guide rails 2, 3 on their side walls angled flat pieces 30 pivotable about an axis perpendicular to the rail bottom, while the locking levers 29 'are pivotally mounted on the stop pieces 10. Between one arm of the locking levers 29 and 29 'and a fixed arm 31 arranged on the guide rails 2 and 3, a tension spring 32 is clamped in each case, which attempts to pivot the locking levers 29 and 29' in such a way that their triangular locking plates 33 over the guide rails 2 and 3 lie. On these triangular-shaped locking plates 33 there are locking pegs 34 pointing downwards. In the locking position shown, these locking pegs 34 overlap foot parts of certain types of supports which extend in the longitudinal direction of the rail, so that vertical movement of the corresponding foot part is impossible. When the stretchers are moved longitudinally, the locking levers 29, 29 'are pivoted due to their inclined surfaces 33' on the locking plates 33 against the force of the springs 32, so that the support feet pass the locking levers 29, 29 'and a stretcher can be pulled out or pushed in.

9 and 10 show a tiltable arrangement of the table 1 on a carriage 35, which is arranged in vehicle-fixed C-shaped guides 36 on rollers 37 so as to be longitudinally displaceable. At one end of the carriage 35, angle brackets 38 are arranged in joints 39 so as to be pivotable about the transverse axis of the carriage. The table 1 is mounted on these angle brackets 38, the front part of which rests on the carriage 35 when the angle brackets are pivoted up.

If the car is pulled towards the rear of the vehicle, the angle brackets 38 with the table 1 mounted thereon protrude from the open rear of the vehicle and can be swung down into the inclined position shown in broken lines, so that a stretcher, not shown, is more easily pushed onto the table 1 or from the table 1 can be removed.

In order to enable the table 1 to be pivoted with little effort, a gas pressure spring 40 or 40 'is provided which, as shown, supports the angle bracket 38 against the carriage 35 or is arranged at the front end of the support table 1 and the front end on the carriage tries to pull down.

Instead of a gas pressure spring, an electric or hydraulic servomotor can also be used.

Claims (12)

1. A stretcher support stage or chassis for securably supporting stretchers, in particular for ambulances usable on rough terrain, the stretcher support stage or chassis comprising U-shaped upwardly open guide rails (2, 3) and locking members (6, 6', 6", 6"', 7, 8) which are each associated with one of the guide rails (2, 3), with the locking members associated with one guide rail (2, 3) being jointly adjustable, wherein the locking members, in cooperation with the respectively associated guide rail, secure feet (19) which are arranged on the stretchers, and which can be pushed into the guide rails, in form locked manner against impermissible relative movement in the direction of all three spatial axes, characterised in that

- stretchers, the feet (19) of which have a different spacing in the transverse direction (track width) and different foot width and/or shape, in addition to a different longitudinal spacing, can be secured because

- the guide rails (2, 3) have a rail width sufficient for the largest foot width,

- at least one (3) of the guide rails (2, 3) is appropriately widened for not only stretchers with the largest track width to be pushed into place but also stretchers with the smallest track width,

- abutment members (10, 11) with wedge-like inclined front surfaces (10', 11') which narrow the rail width and which cooperate with the stretcher feet (19) are fixedly arranged at the one end region of the rails (2, 3) and block the end region of the rails (2, 3) for the feet of stretchers of one track width and leave the end region free for the feet of other stretchers with another track width, and

- the locking members (6, 5', 6", 6"', 7, 8) arranged at the two guide rails (2, 3) are jointly engageable and disengageable by means of a common actuating device (13, 14, 15).

2. A stretcher support stage in accordance with claim 1, characterised in that abutment pieces or pins (12) which each extend in the longitudinal direction of the rails are fixedly arranged at the end region of the rails (2, 3) and engage over transversely extending foot parts of one type of stretcher when the stretcher is pushed into place and determine the desired position of other stretchers by abutment.

3. A stretcher support stage in accordance with one of the claims 1 and 2, characterised in that locking bolts (6) or pivotable locking levers (7, 8) which engage behind and/or over parts (19, 19', 19", 19⁺) of the stretcher feet are provided as locking members.

4. A stretcher support stage in accordance with one of the claims 1 to 3, characterised in that the locking members carry abutments (18) - preferably resilient - which, when the stretcher is secured, contact its frame or foot parts in the transverse direction of the stretcher and/or in the longitudinal direction and/or from above and reduce or block the freedom of movement of the secured stretcher on the support stage.

5. A stretcher support stage in accordance with one of the claims 1 to 4, characterised in that only abutments (18) arranged on the locking members on one side of the support stage try to push the stretcher sideways in such a way that its feet can be pushed at one longitudinal side against one sidewall of one of the guide rails (2, 3).

6. A stretcher support stage in accordance with one of the claims 1 to 5, characterised in that automatic locking members (9, 29, 29') independent of the actuating member (13, 14, 15) resiliently engage and disengage on longitudinal movement of the stretcher.

7. A stretcher support stage in accordance with claim 6, characterised in that the automatic locking members (9, 29, 29') have inclined surfaces (9', 33') which cause deflection as the stretcher feet move past.

8. A stretcher support stage in accordance with claim 7, characterised in that the locking levers (29), which are arranged as automatic locking members, are pivotable about an axis perpendicular to the support stage and carry an abutment piece (34) which points downwardly, approximately at right angles to the direction of deflection, and which engages in the locked position over foot parts of the stretchers from above (Fig. 8).

9. A stretcher support stage in accordance with one of the claims 1 to 8, characterised in that the locking levers (7) provided as locking members are of C-shape or hook-like shape, are pivotable about an axis which extends transversely to the longitudinal axis of the rails, project in the locked position through an opening (27) in the guide rails (2, 3) - preferably from one side - and engage with their free ends (28) in hook-like manner over a foot part which extends transversely to the longitudinal axis of the rails.

10. A stretcher support stage in accordance with one of the claims 1 to 9, characterised in that the common actuating member (13, 14, 15) has a shaft (13) preferably arranged in the longitudinal direction of the stretcher support stage, with arms (15) which are pivotally coupled with the locking members via push rods (16) being rotatably fixedly arranged on the shaft and adopting in the locked position an over dead center position, which is preferably restricted by an abutment of the like.

11. A stretcher support stage in accordance with one of the claims 1 to 10, characterised in that the support stage has a carriage (35) which is longitudinally displaceable in guides (36) fixed to the vehicle, with the guide rails (2, 3) for the stretcher being arranged thereon and pivotable about the transverse axis of the vehicle in the form of a tilting table ; and in that the tilting table is arranged on the carriage (35) as an extension thereof, and can also be lowered downwardly by pivoting for removal or placement of the stretcher when the carriage (35) is drawn back in the longitudinal direction of the vehicle.

12. A stretcher support stage in accordance with claim 11, characterised in that the tilting table and the carriage (35) are connected together by a gas pressure spring (40, 40') or by a servo-motor, for example an electrical or hydraulic servo-motor.

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