ES2878270T3 - Loading device for motorized ambulance stretcher - Google Patents

Abstract

An assembly of a motorized ambulance stretcher (1) and a loading device therefor, the loading device comprising a sliding guide block (4), an extension arm (3), a linear guide (2) configured to be fixedly mounted on the floor of an ambulance and a fastening system (5), characterized in that a. the ambulance stretcher (1) comprises a stretcher part and a built-in chassis, wherein a horizontal bar (43) is arranged in the front part of the chassis, and the chassis is further provided with two front pins (44), a surface (22) to guide a locking pin (16) and a double action lock (23) comprising an upper lock (24) and a lower pawl (25), where a rear pin (45) and a lever (40 ) of the double action lock (23) are located at the rear of the chassis; b. the sliding guide block (4) has a main approach ramp (6), side approach ramps (7) and adjoining surfaces (8) in the longitudinal direction that can be attached to the front of the ambulance stretcher (1 ), where the main approach ramp (6) guides the ambulance stretcher (1) to a correct vertical position and the lateral approach ramps (7) with the adjacent surfaces (8) in the longitudinal direction guide the ambulance stretcher (1) to a correct horizontal position, and the sliding guide block (4) is further provided with two autonomous locks (9), each comprising a thrust lever (10), a first gear mechanism (11) and a ratchet (12), where with the front part of the ambulance stretcher (1) pressed simultaneously on both push levers (10) of the autonomous locks (9), the ratchet (12) is released by means of the first mechanism of gear (11) to thus unlock the block that of sliding guide (4) for linear displacement on the extension arm (3) by means of sliders (13) mounted on the sliding guide block (4), where autonomous locks (9) block backward movement of the ambulance stretcher (1) in the horizontal direction after unlocking the slide guide block (4); c. the extension arm (3) has two guide ends (15) with rollers, two guide side bars (14) with stops (20) at the front and a profiled hole (21) for the pawl (12), in addition the locking shaft (16) arranged in a lever mechanism (17), an arm lock (18) and an arm locking lever (19), wherein the lever mechanism (17) controls the position of the locking shaft lock (16) with respect to the position of the slide guide block (4), the arm lock (18) fixes the extension arm (3) in the maximum extension position and the arm lock lever (19) has a contact surface (27) that allows unlocking the extension arm (3) by hand or by means of the stretcher ambulance chassis (1), where the locking pin (16) is guided in the double action lock (23) of the ambulance stretcher (1) by the surface (22), where the blocking of the blocking axis (16) in the upper blocking (24) of the double action blocking (23) guarantees e l Correct positioning of the ambulance stretcher (1) in the longitudinal direction after supporting the ambulance stretcher (1) on the extension arm (3), and the lower pawl (25) of the double action lock (23) is automatically locks with a cross shaft (26) located on the extension arm (3) when the ambulance stretcher (1) rests on the extension arm (3), thus preventing the ambulance stretcher (1) from tilting in the longitudinal direction and where the double action lock (23) is unlocked by pulling the lever (40) of the double action lock (23) on the ambulance stretcher (1); d. the linear guide (2) has a pair of mirrored stationary rails (41) configured to be fixedly mounted on the floor of the ambulance, wherein a telescopic sliding bar (48) is arranged on each stationary rail (41) and the arm extension arm (3) is slidably arranged between the slide bars (48), wherein a linear displacement of the extension arm (3) is provided along the slide bars (48) between their extreme positions; and e. the fastening system (5) has a front block (28), a rear block (29) and a coupling pull rod (30), where the front block (28) is configured to be fixedly mounted on the ground of the ambulance and has two spring-loaded locking pins (31) on which there are slots (46) for the front pins (44) of the ambulance stretcher (1) and which are provided at the bottom with pull rods ( 32) connected to a transmission shaft (33), and in the central part of the front block (28), the transmission shaft (33) is provided with a second gear mechanism (34) that positions the coupling pull rod (30) with respect to the transmission shaft (33), where the rear block (29) is configured to be fixedly mounted on the floor of the ambulance and has a strut gear (35) at the bottom, which positions the coupling pull rod (30) to the locking blocks (36), and two locking blocks (36) at the top, a spring-loaded spacer (37) between them, a slot (47) above them for the rear pin (45) of the ambulance stretcher (1), and further down the rear two guide surfaces (38) and a control lever (39), where both locking pins (31) and both locking blocks (36) are unlocked simultaneously by moving the control lever (39), and with the locking blocks (36) reaching the extreme position, the spring-loaded spacer (37) automatically locks to guide the ambulance stretcher (1) with the sliding guide block (4) and extension arm (3) into the clamping system (5), and wherein by compressing the spring-loaded spacer (37), both locking pins (31) and both locking blocks (36) are unlocked and therefore locked simultaneously, thus blocking the movement of the ambulance stretcher (1) by means of the fastening system (5) in all directions.

Description

DESCRIPTION

Loading device for motorized ambulance stretcher

Technical field

The invention relates to an assembly of a motorized ambulance stretcher and a loading device therefor, the loading device comprising a sliding guide block, an extension arm, a linear guide configured to be fixedly mounted on the ground of an ambulance, and a restraint system. The proposed device falls within the field of medical devices, namely devices used to load medical motorized ambulance stretchers into a road ambulance.

Previous technique

Loading devices are used in road ambulances through which medical ambulance stretchers are loaded from an external environment into an internal ambulance structure and subsequently secured for safe transportation. The terrain conditions of the external environment cause height and angle differences in the reference planes of the stretcher and the loading system. Stretcher operators approach the loading system from varying directions under real conditions, increasing these differences.

An important part of the loading device is an extension arm, which includes the contact surfaces. In the extended state of the arm, the stretcher is positioned on the bearing surfaces with all its weight. By sliding the arm into the ambulance, the loading system, including the stretcher, is locked in a precisely defined locking position of the restraint system.

Supporting the stretcher on the extension arm is a critical stage in the loading process. In this process, the stretcher is placed with its full weight on the defined bearing surfaces of the arm. Correct alignment of the stretcher before leaning on requires more attention from the operator. This also increases working time. There is a risk that the stretcher may be pulled off the supporting surfaces, which can significantly increase the safety risks for both the patient and the operator.

Document US 20160287454 A1 describes self-driving ambulance stretchers including a support frame, a pair of legs and a hydraulic actuator. The support frame is guided from a front end to a rear end of the stretcher. The pair of legs are in movable connection with the support frame. The hydraulic actuator is in movable connection with the pair of legs and the support frame, extending and retracting the pair of legs to the support frame. The hydraulic actuator comprises a cylindrical housing, a rod, and a sliding guide member. The slide guide member is movably attached to the cylindrical housing and is rigidly attached to the bar, the slide guide member moving in the direction of the barrel.

In EP 2523642 A1 motorized rolling stretchers include a support frame, a pair of front legs, a pair of rear legs and a stretcher drive system. The front pair of legs can be slidably attached to the support frame. The front leg comprises at least one front wheel. The pair of rear legs is slidably coupled to the support frame and each rear leg comprises at least one rear wheel. The drive system for the stretcher includes a front actuator that moves the front legs and a rear actuator that moves the rear legs. The front actuator and the rear actuator raise or lower the support frame together. The front actuator raises or lowers the front end of the support frame independently of the rear actuator, while the rear actuator raises or lowers the rear end of the support frame independently of the front actuator.

DE 102008005900 A1 discloses a telescopic ambulance table specially designed for use in ambulances. The telescopic ambulance table comprises a lower table, which is arranged horizontally in the ambulance in the longitudinal direction to the stretcher and which is equipped with an articulated joint so that its vertical position can be changed. The telescopic ambulance table further includes extendable supports that are slidably connected to the lower table and are used to extend from the cargo compartment of the ambulance and to subsequently secure the stretcher. The telescopic ambulance table further includes a propeller for extendable supports that controls the movement of the supports in the longitudinal direction and that ensures that the patient is transported on the stretcher in and out of the ambulance. The thruster is controlled by a thrust control, depending on the load and the position of the extension supports.

The ambulance stretcher described in EP 2431015 A2 consists of a base frame, a stretcher frame and a support mechanism coupled to the base frame and the stretcher frame. The support mechanism comprises at least one pair of frame members that are centrally connected to each other. Each of the frame members has opposite ends fixed to the base frame and to the stretcher frame, wherein at least one of said pair of frame members is provided with a first support arranged between its middle length and the base frame, while the second bra is arranged between its mid-length and the bunk frame. The first and second supports are arranged to contact the base frame and the bunk frame.

In EP 2384728 A1 a combined loading and securing system for stretchers is described. This system is designed to load and unload ambulance stretchers of normal height, approximately 76 centimeters, into an emergency rescue vehicle with a transport platform greater than 78 centimeters. The system includes a pair of tracks, a shuttle assembly to safely pull the ambulance stretcher along the pair of tracks, and a locking mechanism held on the shuttle assembly. The shuttle assembly comprises a frame having a first end, a second end, a longitudinal body, two pairs of stabilizer bars, a pair of lift cylinders, and a three-prong clamping yoke assembly that supports the locking mechanism. The other end is adjacent to the interior of the vehicle. The pair of tracks guides the ambulance stretcher into or out of the vehicle, while the locking mechanism releasably fixes the ambulance stretcher to the tracks. The shuttle assembly is arranged so that the locking mechanism is below vehicle level at an angle of 10 ° to 25 ° and at a distance of 22.8 to 50 cm from the vehicle.

The stretcher loading platform described in WO 9804228 A1 comprises a base frame which is adapted to secure the stretcher in an ambulance, and a support tray with head and foot parts arranged on the base frame. The support tray further comprises lifting arms that are rotatably mounted between the base frame and the support tray. The front lift arm allows the ambulance stretcher to be in and out, while the rear lift arm is slidably connected to the stretcher by means of a pivot joint formed on the front lift arm. This allows the stretcher to be tilted to the desired position.

European patent application EP 2366369 A2 discloses a support module that has a base unit that receives the patient stretcher, and a guide path that allows the formation of an intermediate position between a patient support position and a patient position. patient reception, in a non-telescopic condition of the base unit. The change in inclination of the patient stretcher is achieved with respect to the supporting position of the patient in addition to a change in a horizontal position of the patient stretcher, in the receiving position of the patient. The patient support position is achieved from the intermediate position by telescoping the base unit.

International patent application WO 2011041170 A2 discloses an ambulance stretcher loading and unloading apparatus, which includes a base to be mounted on the platform of an emergency vehicle and an arm mounted for linear movement along the base, which It is configured to be attached to an ambulance stretcher. A driving mechanism is provided to lift the arm, which is configured in the presence of a force applied with a first magnitude on the arm to raise the arm at a first speed and in the presence of a force applied on the arm with a second magnitude greater than the first magnitude to raise the arm to another speed or speeds lower than the first speed.

Summary of the invention

The object of the invention is to design a loading device for the safe and intuitive loading of a motorized ambulance stretcher into a road ambulance.

The present invention, as defined in claim 1, provides an assembly of a motorized ambulance stretcher and a loading device therefor, the loading device comprising a sliding guide block, an extension arm, a configured linear guide to be fixedly mounted on the floor of an ambulance, and a restraint system.

The ambulance stretcher comprises a stretcher part and a built-in chassis, wherein a horizontal U-shaped bar is arranged at the front of the chassis, and the chassis is further provided with two front pins, a surface for guiding an axis of lock and a double action lock comprising an upper lock and a lower ratchet. At the rear of the chassis, there is a rear pin and a lever of the double action lock, a lever that unlocks it after pulling.

The slide guide block guides the ambulance stretcher to the correct position relative to the extension arm, which in turn guides the entire assembly through a linear guide to the clamping system.

The slide guide block is made up of a set of approach ramps to assist the operator in the initial alignment of the ambulance stretcher with the loading system. The set of approach ramps is made up of a main approach ramp, lateral approach ramps and adjacent surfaces in the longitudinal direction that can be attached to the horizontal bar at the front of the ambulance stretcher, where the main approach ramp guides the ambulance stretcher to a correct vertical position and the lateral approach ramps with adjacent surfaces in the longitudinal direction guide the ambulance stretcher to a correct horizontal position. The ambulance stretcher is guided along the approach ramps to two autonomous automatic locks, which, with a simple pressure, unlock the movement of the guide block and at the same time they lock the construction of the ambulance stretcher and the guide block together. Each autonomous lock comprises a push lever, a first gear mechanism and a pawl, whereby with the front of the ambulance stretcher simultaneously pressed on both push levers of the autonomous locks, the pawl is released by means of the first mechanism. to thereby unlock the slide guide block for linear movement on the extension arm by means of sliders mounted on the slide guide block. This ensures that the ambulance stretcher is correctly guided during further movement along the extension arm. Lock control is automatic and does not require operator attention. The locks are designed with respect to the construction in such a way that they cannot be unlocked when approaching the ambulance stretcher from the wrong positions in the vertical and horizontal direction. Self-contained locks lock the back horizontal movement of the ambulance stretcher when the slide block is unlocked.

The extension arm includes two roller guide ends, two guide side bars with stops at the front and a shaped recess for the ratchet, in addition, the locking shaft arranged on a lever mechanism, an arm lock and a arm lock lever. The lever mechanism, which is mounted on the extension arm, controls the position of the locking shaft relative to the position of the slide guide lock, the arm lock fixes the extension arm at the maximum extension position and the lever for Arm lock has a contact surface that allows the extension arm to be unlocked by hand or via the ambulance stretcher chassis. After moving the guide block, the mechanism, including the locking shaft, is lifted, which is then automatically locked into the double-action lock consisting of the upper lock and the lower ratchet and is mounted on the stretcher chassis of ambulance and the ambulance stretcher locks against reverse displacement. The locking axis lock in the upper lock ensures the correct positioning of the ambulance stretcher in the longitudinal direction after resting the ambulance stretcher on the extension arm, and the lower ratchet is automatically locked with a transverse axis located in the extension arm when the ambulance stretcher rests on the extension arm, thus preventing the ambulance stretcher from tipping in the longitudinal direction. The sequence of stages for anchoring the ambulance stretcher allows the stretcher to rest in a safe and precisely defined position on the extension arm. The double action lock is unlocked by pulling the lever on the ambulance stretcher.

The slide guide block design in conjunction with the extension arm design allows for a wide range of relative positions of the loading system relative to the ambulance stretcher, but critical positions are eliminated.

After contacting the extension arm, the lower construction of the ambulance stretcher folds down to compress the extension arm locking lever. The unlocked extension arm is inserted into the ambulance via the linear guide, where the front and rear pins on the ambulance stretcher chassis are automatically locked into the clamping system in the extreme position. The whole assembly is locked in the clamping system against lateral, longitudinal and vertical movements during transport.

The linear guide has a pair of mirrored stationary rails configured to be fixedly mounted on the ambulance floor, wherein a telescopic slide bar is arranged on each stationary rail and the extension arm is slidably arranged between the slide bars, wherein a linear displacement of the extension arm is provided along the slide bars between their extreme positions. Advantageously, the extension arm is supported on both sides by a pair of sliding carriages that advance between the pair of sliding bars.

The clamping system has a front block, a rear block, and a coupling pull rod. The front pin of the ambulance stretcher is attached to the front block and the rear pin of the ambulance stretcher to the rear block. The front block is configured to be fixedly mounted to the ambulance floor and has two spring-loaded locking pins provided at the bottom with draw rods connected to a driveshaft, and in the middle of the front block, the Drive shaft is provided with a second gear mechanism that positions the coupling pull rod relative to the drive shaft. Above the front block locking pins are slots for the front pins of the ambulance stretcher. The rear block is also configured to be fixedly mounted to the ambulance floor and has a strut gear at the bottom, which positions the coupling draw rod relative to the lock blocks, and two lock blocks at the bottom. upper part, a spring-loaded spacer between them, a slot above them for the rear pin of the ambulance stretcher, and further on the rear two guide surfaces and a control lever. Above the locking blocks, there is a slot for the rear pin for the ambulance stretcher. By moving the control handle, both locking pins and both locking blocks are unlocked simultaneously, with the locking blocks reaching the extreme position, the spring loaded spacer is automatically locked to guide the ambulance stretcher with the slide guide block and the extension arm inside the clamping system. To fully guide the ambulance stretcher inward, both front pins must fit into the front pin slots as well as the rear pin into the rear pin slot. By compressing the spring loaded spacer, both locking pins and both locking blocks are unlocked and thus locked simultaneously, thus locking the movement of the ambulance stretcher by the clamping system in all directions.

Description of the drawings

The invention will be illustrated with the drawings where: Figure 1 is an isometric view of a loading device including an ambulance stretcher; Figure 2 is an isometric view of a slide guide block; Figure 3 shows a detailed view of a slide block mechanism from below; Figure 4 is an isometric view of an extension arm; Figure 5 shows a detailed view of the principle of the locking mechanism of the extension arm and the ambulance stretcher; Figure 6 is an isometric view of the fastening system; Figure 7 shows a detailed view of the arrangement of the locking mechanism in the front block of the clamping system; Figure 8 shows a detailed view of the prop gear in the rear block of the clamping system; Figure 9 shows an isometric view of the arrangement of the mechanisms in the rear block of the clamping system; Figure 10 shows a detail of the rear part of the ambulance stretcher including the double action lock lever and the rear pin; Figure 11 shows an isometric view of the positioning of the extension arm on the linear guide; Figure 12 shows a detail of the front part of the ambulance stretcher including the horizontal bar and the front pins from the bottom, and Figure 13 shows the extreme positions of the locking axis on the extension arm.

Description of illustrative embodiments

The assembly of a motorized ambulance stretcher and a loading device therefor will be illuminated in an illustrative embodiment thereof with reference to the respective drawings.

The interconnection of the individual components of the device is shown in Figure 1. The assembly comprises an ambulance stretcher 1 and a loading device comprising a sliding guide block 4, an extension arm 3, a fixedly mounted linear guide 2_ on the ambulance floor and a clamping system 5, also fixedly mounted on the ambulance floor.

The ambulance stretcher 1 is shown in Figures 4, 10 and 12 and includes a stretcher part and a built-in chassis. A horizontal bar 43 is arranged at the front of the chassis, and the chassis is further provided with two front pins 44, a surface 22 for guiding a lock shaft 16, and a double-action lock 23 comprising an upper lock 24 and a lower pawl 25, wherein a rear pin 45 and a lever 40 of the double action lock 23 are located at the rear of the chassis.

The slide guide block 4 is shown in Figure 2. In this illustrative embodiment, the slide guide block 4 comprises a structure covered by a main approach ramp 6 that acts as its cover. In addition, lateral approach ramps 7, which are the contact surfaces for the front of the ambulance stretcher structure 1, comprise the horizontal bar 43 and a pair of front pins 44 as shown in Figure 12. To guide the ambulance stretcher 1, there are the lateral approach ramps 7 that guide the horizontal bar 43 in the horizontal direction, while the main approach ramp 6 guides the horizontal bar 43 in the vertical direction. The lateral approach ramps 7 are joined by longitudinal surfaces 8 that precisely define the horizontal bar 43 in the horizontal plane of the ambulance stretcher 1. The sliding guide block 4 is also provided with two autonomous locks 9 formed by a lever of thrust 10, a first gear mechanism 11 and a ratchet 12, as shown in Figure 3.

The function of the slide guide block 4 is as follows. The sliding guide block 4 is only released when the two autonomous locks 9 are unlocked by the horizontal bar 43 which pushes the lever 10 in such a way that the pawl 12 is released by the first gear mechanism 1_1 and therefore guarantees the mobility of the sliding guide block. 4. Simultaneously, when unlocked, the autonomous locks 9 are brought into the position in which they lock the rearward movement of the ambulance stretcher 1 in the horizontal direction. This lock is effective for the entire trajectory along the extension arm 3_except for the extreme starting position, that is, the position where the sliding block 4 is at the edge of the arm 3. The sliding guide block 4 is provided of sliders 13 that allow linear movement on the extension arm 3.

An illustrative embodiment of the extension arm 3 is shown in Figure 4. The extension arm 3 comprises guide side bars 14, guide ends 15 with rollers, a locking shaft 16 fixed on the arms of a lever mechanism 17, an arm lock 18 and an arm lock lever 19. The guide side bars 14 for the slide guide block 4 are provided with stops 20 and a shaped recess 21 for the pawl 12.

The lever mechanism 17 controls the position of the locking shaft 16 in relation to the position of the sliding guide block 4. When the sliding guide block 4 is advanced forward, the locking shaft 16 is automatically raised to the highest position. high as shown in Figure 13. The interval between the lowest and highest position of the locking axis 16 defines the range of vertical distance allowable between the extension arm 3 and the ambulance stretcher 1.

The ambulance stretcher 1 has a surface 22 to guide the locking shaft 16 into the double action lock 23 arranged on the chassis of the ambulance stretcher 1, wherein the double action lock 23 comprises an upper lock 24 and a lower ratchet 25 as shown in Figure 5. The first stage of locking the double action lock 23 is to lock the locking shaft 16 in the upper lock 24. This stage ensures that the ambulance stretcher 1 it is correctly positioned in the longitudinal direction after it has contacted the extension arm 3. The second locking stage of the double action lock 23 is that the lower ratchet 25 automatically locks the transverse axis 26 when the ambulance stretcher 1 is supported on the extension arm 3, thus blocking the inclination of the ambulance stretcher 1 in the longitudinal direction. When unlocking the double action lock 23, both steps are performed simultaneously by pulling the lever 40 on the ambulance stretcher 1 shown in Figure 10. The locking of the arm 18 of the extension arm 3 fixes the extension arm 3 in the position maximum extension of the loading device. The locking lever of the arm 19 of the locking 18 of the extension arm 3 has a contact surface 27 that allows unlocking by hand or by the chassis structures as shown in Figure 4.

Linear guide 2 comprises a pair of mirrored stationary rails 41 fixedly mounted on the floor of the ambulance, where each stationary rail receives a telescopic slide rail 48 . An extension arm 3 is slidably arranged between the slide rails 48. Advantageously, the extension arm 3 is supported on both sides on slide carriages 42 advancing on slide rails 48, as can be seen in Figure 11. The range of advance of the telescopic slide rails defines the working path of the extension arm 3. The maximum extension of the telescopic slide rails is designed with respect to the installation dimensions of common use vehicles, where, during driving, it should not occur a collision with any part of the vehicle body (for example, a road ambulance).

The clamping system 5 comprises a front block 28, a rear block 29 and a coupling pull rod 30, as shown in Figure 6. The front block 28 has two slots 46 for the front pins 44 arranged on the stretcher. ambulance 1, as shown in Figures 6 and 12, and on the sides, two spring-loaded locking pins 31 provided with pull rods 32 at the bottom, which are connected to the transmission shaft 33, as shown in Figure 7. In the central part of the front block 28, the drive shaft 33 is equipped with a second gear mechanism 34 which is adjustable so that the position of the coupling draw rod 30 relative to the drive shaft 33 can be adjusted with precision. As shown in Figures 6, 8 and 9, the rear block 29 comprises a strut gear 35, locking blocks 36, a spring-loaded spacer 37, guide surfaces 38, a control lever 39 and a slot 4Z for the rear pin 45 arranged on the ambulance stretcher 1. Applying force to the control lever 39 simultaneously unlocks the two locking pins 31 (see Figure 6) and the two locking blocks 36 (see Figure 9). Upon reaching the final position of the locking blocks 36, the spring-loaded spacer 37 automatically locks it. The interlocking of the assembly comprising the front and rear blocks 28 and 29 and the coupling pull rod 30 ensures that both locking pins 31 and both locking blocks 36 remain in the unlocked position. By pressing the spring-loaded spacer 37, the front and rear blocks 28 and 29 simultaneously unlock and lock both locking pins 31 and both locking blocks 36. In the locked state, the clamping system 5 locks the front pins 44 and the pin. rear 45 and hence the movement of the ambulance stretcher 1 in all directions.

Industrial Applicability

The present invention can be used in the medical field, particularly in devices for loading motorized ambulance or medical stretchers into a road ambulance.

Reference symbols list

1. Ambulance stretcher

2. Linear guide

3. Extension arm

4. Slide guide block

5. Clamping system

6. Main approach ramp

7. Lateral approach ramp

8. Adjacent surface in the longitudinal direction

9. Autonomous blocking

10. Push lever

11. Autonomous Lock 9 First Gear Mechanism

12. Ratchet

13. Slider

14. Side guide bar

15. Guide end

16. Locking shaft

17. Lever mechanism

18. Extension arm arm lock 3

19. Arm Lock Arm Lock Lever 18 Extension Arm 3

20. Stop 21. Conformed recess

22. Surface to guide the locking shaft 16

23. Double action lock

24. Double Action Lock Top Lock 23

25. Double Action Lock Lower Ratchet 23

26. Transverse axis

27. Contact surface

28. Front block

29. Rear block

30. Coupling pull rod

31. Locking pin

32. Front block pull rod 28

33. Drive shaft

34. Front Block Second Gear Mechanism 28 35. Strut Gear

36. Blocking block

37. Spring Spacer

38. Guide surface

39. Control lever

40. Double Action Lock Lever 23

41. Stationary rail

42. Car

43. Horizontal bar

44. Front pins

45. Rear pin

46. Slot for front pins 44

47. Slot for rear pin 45

48. Slider bar

Claims (2)

1. A set of a motorized ambulance stretcher (1) and a loading device therefor, the loading device comprising a sliding guide block (4), an extension arm (3), a linear guide (2) configured to be fixedly mounted on the floor of an ambulance and a fastening system (5), characterized in that to. The ambulance stretcher (1) comprises a stretcher part and a built-in chassis, wherein a horizontal bar (43) is arranged at the front of the chassis, and the chassis is further provided with two front pins (44), a surface (22) to guide a locking shaft (16) and a double action lock (23) comprising an upper lock (24) and a lower ratchet (25), wherein a rear pin (45) and a lever (40 ) of the double action lock (23) are located at the rear of the chassis; b. The sliding guide block (4) has a main approach ramp (6), lateral approach ramps (7) and adjacent surfaces (8) in the longitudinal direction that can be attached to the front of the ambulance stretcher (1 ), where the main approach ramp (6) guides the ambulance stretcher (1) to a correct vertical position and the lateral approach ramps (7) with adjacent surfaces (8) in the longitudinal direction guide the ambulance stretcher (1) to a correct horizontal position, and the sliding guide block (4) is further provided with two autonomous locks (9), each comprising a push lever (10), a first gear mechanism (11) and a ratchet (12), where with the front part of the ambulance stretcher (1) simultaneously pressed on both thrust levers (10) of the autonomous locks (9), the ratchet (12) is released by means of the first locking mechanism. gear (11) to thus unlock the block that of sliding guide (4) for linear movement on the extension arm (3) by means of sliders (13) mounted on the sliding guide block (4), where the autonomous locks (9) block the backward movement of the ambulance stretcher (1) in the horizontal direction after unlocking the sliding guide block (4); c. The extension arm (3) has two guide ends (15) with rollers, two guide side bars (14) with stops (20) at the front and a profiled hole (21) for the ratchet (12), furthermore the locking axis (16) arranged in a lever mechanism (17), an arm lock (18) and an arm locking lever (19), wherein the lever mechanism (17) controls the position of the axis of lock (16) relative to the position of the slide guide block (4), the arm lock (18) fixes the extension arm (3) in the maximum extension position and the arm lock lever (19) has a contact surface (27) that allows unlocking the extension arm (3) by hand or by means of the stretcher ambulance chassis (1), where the locking axis (16) is guided in the double action lock (23) of the ambulance stretcher (1) by the surface (22), where the locking of the locking axis (16) in the upper lock (24) of the double-action lock (23) guarantees e The correct positioning of the ambulance stretcher (1) in the longitudinal direction after resting the ambulance stretcher (1) on the extension arm (3), and the lower pawl (25) of the double action lock (23) is It locks automatically with a transverse axis (26) located on the extension arm (3) when the ambulance stretcher (1) rests on the extension arm (3), thus preventing the ambulance stretcher (1) from tilting in the longitudinal direction and where the double action lock (23) is unlocked by pulling the lever (40) of the double action lock (23) on the ambulance stretcher (1); d. The linear guide (2) has a pair of mirrored stationary rails (41) configured to be fixedly mounted on the ambulance floor, wherein a telescopic slide bar (48) is arranged on each stationary rail (41) and the arm The extension arm (3) is slidably arranged between the slide bars (48), wherein a linear displacement of the extension arm (3) is provided along the slide bars (48) between their extreme positions; Y and. The clamping system (5) has a front block (28), a rear block (29) and a coupling pull rod (30), wherein the front block (28) is configured to be fixedly mounted on the ground of the ambulance and has two spring-loaded locking pins (31) on which there are slots (46) for the front pins (44) of the ambulance stretcher (1) and which are provided at the bottom with traction rods ( 32) connected to a transmission shaft (33), and in the central part of the front block (28), the transmission shaft (33) is provided with a second gear mechanism (34) that positions the coupling traction rod (30) relative to the drive shaft (33), where the rear block (29) is configured to be fixedly mounted on the ambulance floor and has a strut gear (35) at the bottom, which positions the coupling pull rod (30) relative to lock blocks (36), and two locking blocks (36) at the top, a spring-loaded spacer (37) between them, a slot (47) above them for the rear pin (45) of the ambulance stretcher (1), and later on the rear two guide surfaces (38) and a control lever (39), wherein both locking pins (31) and both locking blocks (36) are unlocked simultaneously by moving the control lever (39), and with the locking blocks (36) reaching the extreme position, the spring-loaded spacer (37) locks automatically to guide the ambulance stretcher (1) with the sliding guide block (4) and the extension arm (3) into the clamping system (5), and wherein by compressing the spring-loaded spacer (37), both locking pins (31) and both locking blocks (36) are unlocked and therefore locked simultaneously, thus locking the movement of the ambulance stretcher (1) by means of the clamping system (5) in all directions. The assembly according to claim 1, characterized in that the extension arm (3) is supported on both sides on a pair of sliding carriages (42) that advance between the pair of sliding bars (48).