RU2321383C1 - Removable stretcher wheeled carrier for ambulance - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention can be used for transportation of sick and injured man to ambulance, inside ambulance for conveying to hospital and further carrying inside premices. Proposed removable stretcher wheeled carrier for ambulance contains carrying frame with front cross member, middle cross member, rear cross member and first pair of support wheels. Wheels are made for engagement with pan stationary secured on ambulance. Front and rear chassis are mounted for turning on carrying frame with, respectively, second and third pairs of support wheels on their lower ends, and also device for fastening stretcher on carrier, lock for fixing carrier with stretcher on pan, front and rear fixing devices for, respectively, front and rear chassis, device to manually release the chassis when loading a patient made in form of front and rear handles connected, accordingly, with front and rear fixing devices. Front and rear chassis are furnished with first and second stop bridges, accordingly. Stop bridges are fixed in their upper parts. Front fixing device is made in form of first fork-like bracket-strut. Said bracket-strut is provided with first U-shaped part hinge-connected with carrying frame. First link is stationary attached to middle of U-shaped part by one end, and rocking wheel-follower is installed on bracket-fork hinge-mounted and spring-loaded relative to first link on other end of link. Wheel-follower is made for engagement with intake chute of pan. Front handle of manual release device of chassis is connected to this end of first link. First cradle is stationary secured on first link. First cradle is provided with first rigid post and tooth=hook rocking on axle spring-loaded relative to first link by first extension spring. Tooth-hook is made for engagement by its bevel with first stop bridge of front chassis. First stop bridge is installed for engagement with plate springs. Said plate springs are secured on first link. Rear fixing device is made in form of second fork-like bracket-strut. Second bracket-strut is provided with second U-shaped part hinge-connected with carrying frame to middle of which second link is stationary connected by one end. Second cradle is stationary secured on other end of second link. Second cradle contains second rigid post, rigid stop and pusher. Second cradle is made for engagement with second stop bridge at fixing of rear chassis, and with axle of second wheel pairs of front chassis at releasing. Rear handle of manual release device of chassis is secured on carrying frame for longitudinal displacement, being spring-loaded relative to carrying frame and connected by rod with turnable pusher hinge-mounted on link. Turnable pusher is made for engagement with second stop bridge at manual release of rear chassis. Front chassis is spring-loaded from front side of carrying frame relative to carrying frame by second extension spring. Rear chassis is spring-loaded in direction of front side of carrying frame relative to carrying frame by third extension spring at one side, and at other side is spring-loaded by fourth extension spring relative to second link of bracket-strut of rear fixing device. Invention improves reliability of stretcher carrier owing to simplified design and cut down number of heavy loaded parts and units at preservation of independent control of front and rear chassis at their releasing in process of rolling carrier into ambulance and out of ambulance.

EFFECT: improved reliability, simplified design of removable stretcher wheeled carrier.

2 cl, 17 dwg

Description

The invention relates to medicine and can be used to transport sick and injured people from the place of loading of a sick or injured person to an ambulance ambulance (ground, water, air), or inside a vehicle, when unloading from it and delivered to stationary clinic (hospital), as well as for further transportation inside the clinic (hospital) to the place of patient unloading.

There are various designs of wheelchairs with a stretcher for transporting patients, for example, “Stretcher-wheelchair NK-01” and “Chair-wheelchair-stretcher folding KNK-01” of the company Dolgoprudnensky Research and Production Enterprise, Dolgoprudny, Moscow Region.

Such devices for transporting patients provide transportation of patients (victims) to the vehicle, as well as inside the vehicle.

However, the field of use of such devices is limited by their design features - high weight and low functionality, which reduce their reliability during operation and increase the risk of additional injury to the transported patient.

Various designs of wheelchairs for removable stretchers are also known, see, for example, RF patent No. 2102053, A61G 1/02, 1996; RF patent No. 2141811, A61G 1/02, B62B 3/00, 1997; US patent No. 4192541, A61G 1/02, BV 3/02, 1978; UK patents No. 1544281, B62B 3/02, 1976; No. 1535395, B2B 3/02, 1978; No. 2283415, A61G 1/02, 1993; No. 2289113, A61G 1/02, 1994; German application No. 29502088.1, A61G 1/02, 1995; US patent No. 5365622, A61G 1/02, 1992; No. 5435027, A61G 1/02, 1995, WIPO Application No. 2004028432, A61G, 2005, etc.

Such wheelchairs, although they allow you to transport sick or wounded patients with the help of a stretcher mounted on top of them, however, due to some features of their rather complex designs, they usually have insufficient rigidity, are not technologically advanced to manufacture, and are rather inconvenient for medical personnel folding and driving into a vehicle.

The closest solution to the claimed is the known design of the trolley under the removable stretcher for a sanitary vehicle according to the patent of the Russian Federation for utility model No. 54775, A61G 1/02, 2006.

This wheeled trolley contains a supporting frame with three crossbars and with two front support wheels made interacting with a pallet fixedly mounted on the vehicle, mounted on the supporting frame with the ability to rotate the front and rear chassis with pairs of support wheels at their lower ends, a device for mounting a stretcher on a trolley, lock for mounting a trolley with a stretcher on a pallet, front and rear locking devices for front and rear chassis, respectively, and a device for handles second releasable chassis during loading of the patient from the ground, formed in a front and rear handles kinematically connected respectively to the front and rear locking devices.

This trolley has a high reliability and allows the operator to conveniently transport the stretcher with the patient, providing only a pushing working movement.

At the same time, after conducting many experimental studies and analyzing the operation of commercially available wheelchairs, the kinematic complexity of the mechanisms that fix the support chassis in the working and especially in the intermediate height positions of the frame was revealed, at which the static load in the supporting elements is many times higher than the patient’s weight, which ultimately reduces the reliability of the design of the trolley.

The task to which the claimed invention is directed is to expand the arsenal of existing technical equipment for a specific purpose, namely to increase the efficiency of operation of a trolley with a stretcher for transporting a patient by reducing the likelihood of unexpected failure.

When implementing this invention, it is possible to obtain a technical result consisting in a significant increase in the reliability of the trolley by simplifying its design and reducing the number of heavily loaded parts and assemblies while maintaining the automatic (operator-independent) control of the front and rear chassis when they are locked / unlocked in the process of rolling the trolley into the vehicle and when rolling out of it.

The specified result is achieved by the fact that in a known trolley-carriage containing a supporting frame with three front, middle and rear crossbars and with a first pair of front support wheels made interacting with a pallet, fixedly mounted on the vehicle, mounted on the supporting frame with the possibility of rotation front and rear chassis with, respectively, the second and third pairs of support wheels at their lower ends, a device for mounting a stretcher on a trolley, a lock for mounting a trolley with a stretcher on a pallet , Front and rear locking devices for the respectively front and rear chassis for manual unlocking device chassis during loading of the patient from the ground, formed in a front and rear handles are connected respectively to the front and rear locking devices,

firstly, the front and rear chassis are equipped with motionlessly fixed in their upper parts, respectively, the first and second locking jumpers;

secondly, the front locking device is made in the form of a first fork-shaped bracket-jib, having a first U-shaped part pivotally connected to a supporting frame, to the middle of which a first rod is fixedly attached at one end, at the other end of which is pivotally mounted and spring-loaded relative to the first rod the swinging wheel-copier is installed in the bracket-fork, made by interacting with the receiving tray of the pallet, the front handle of the device for manual unlocking is attached to the same end of the first rod chassis, in addition, on the first rod the first lodgement is fixedly fixed, having a first rigid strut, and a tooth-hook, spring-loaded relative to the first rod, is spring-loaded relative to the first rod and made by interacting with its bevel with the first locking jumper of the front chassis, which also interacts with flat springs mounted on the first bar;

thirdly, the rear locking device is made in the form of a second fork-shaped bracket-jib, having a second U-shaped part pivotally connected to the supporting frame, to the middle of which a second rod is fixedly attached at one end, the second lodgement is fixedly fixed to the other end thereof, having a second rigid a rack, a hard stop and a pusher, while the second lodgement is made interacting when fixing the rear chassis with the second locking jumper, and when unlocking, with the axis of the second wheel pair of the front chassis, chrome e of this, the rear handle of the device for manually unlocking the chassis is mounted on the carrier frame with the possibility of longitudinal movement, is spring loaded relative to the carrier frame and connected via a rod with a pivot pivotally mounted on the rod, made to interact with the second locking bridge when manually unlocking the rear chassis;

fourthly, the front chassis on the front side of the carrier frame is spring-loaded relative to the carrier frame by a second tensile spring, the rear chassis in the direction of the front side of the carrier frame is spring-loaded on one side relative to the carrier frame by a third tension spring and, on the other hand, is spring-loaded relative to the second rod of the rear jib bracket a locking device with a fourth tension spring;

fifthly, the rear chassis in the lower part is equipped with support rollers made interacting with the supporting surface of the pallet inside the vehicle after folding the trolley.

The introduction of new elements into the design of the wheelchair cart, as well as the special implementation of its main blocks, can significantly increase the efficiency of the wheelchair cart and, accordingly, increase the ability to provide emergency medical care to patients and / or injured in emergency situations,

The invention is illustrated by drawings, in which:

- figure 1 shows a side view of the trolley in a working position;

- figure 2 shows a view of the trolley in a plan;

- figure 3 shows the design of the front locking device with a fixed front support;

- figure 4 shows the design of the rear locking device with a fixed rear support;

- Figure 5 shows a side view of the trolley in a folded position;

- Fig.6 shows the beginning of the rolling of the trolley from the vehicle and the beginning of its unfolding at the time of folding the rear chassis;

- Fig.7 shows the continuation of the rolling of the trolley from the vehicle at the time of fixing the rear chassis;

- Fig. 8 shows the final phase of rolling the trolley from the vehicle at the moment of fixing the front chassis;

- Fig.9 shows the position of the trolley before it is rolled into the vehicle at the moment of touching the copy wheel of the receiving tray of the pallet;

- figure 10 shows the start of ekativaniya trolley in the vehicle at the moment of touching the axis of the wheelset of the folding front chassis lodgement device for fixing the rear chassis;

- figure 11 shows the continuation of the evacuation of the trolley in the vehicle at the moment the folding of the rear chassis begins after it is unlocked;

- Fig. 12 shows the position of the trolley when folded inside the vehicle;

- Fig.13 shows a diagram of the position of the elements of the locking device of the front chassis at the time before the start of the fixation;

- Fig.14 shows a diagram of the position of the elements of the locking device of the front chassis before completing the fixation;

- Fig.15 shows a diagram of the operation of the locking device of the front chassis;

- Fig.16 shows a diagram of the position of the elements of the device for fixing the rear chassis at the time before the start of the fixation;

- Fig.17 shows a diagram of the position of the elements of the locking device of the rear chassis after completion of the unlocking.

Note: in all the drawings, the trolley is shown without a removable stretcher.

The proposed trolley for removable stretchers for an ambulance vehicle contains a supporting frame 1 (see Figure 1) with three crossbars (see Figure 2): front 2, middle 3 and rear 4, front wheel pair 5, made interacting with pallet 6 (see Fig. 6, 9), fixedly mounted on the vehicle, mounted on the carrier frame 1 with the possibility of rotation of the front 7 and rear 8 chassis with pairs of support wheels (respectively, a second pair of non-rotatable front 9 and a third pair of rotary rear 10 ) at their lower ends, a device for stretcher replicas on a trolley, made, for example, in the form of a L-shaped cross-section of an abutment 11 and a clamp 12. A lock (not shown) is mounted on a pallet 6 inside the vehicle for fastening a trolley with a stretcher.

There are also two (front 13 and rear 14) locking devices for the front 7 and rear 8 chassis, respectively, and a device for manually unlocking the chassis when loading the patient from the ground, made in the form of front 15 and rear 16 handles connected respectively to front 13 and rear 14 fixing devices. The front 7 and rear 8 chassis are equipped with fixed jumpers fixed in their upper parts, respectively, the first 17 and second 18, respectively.

The front locking device 13 is made (see Fig. 1, 2) in the form of a first fork-shaped bracket-jib, having a first U-shaped part 19 pivotally connected to the supporting frame 1, to the middle of which the first rod 20 is fixedly attached at one end, at the other end which on the pivot bracket 21 which is pivotally mounted and spring-loaded relative to the first rod 20 (see FIGS. 3, 8) has a swinging copier wheel 22 made cooperative (see FIG. 9) with the receiving tray 23 of the pallet 6. To the same end the first rod 20 is attached front Ucka 15 devices for manual unlocking of the chassis.

In addition, on the first rod 20 the first lodgement is fixedly fixed (see FIGS. 3, 13, 14, 15), having a first rigid strut 24 and swinging on the axis 25 (see FIG. 15), tooth-hook spring-loaded relative to the first rod 20 26, made interacting with its bevel 27 with the first locking jumper 17 of the front chassis 7.

When fixing the front chassis 7, the tooth hook 26 is deflected by the first locking jumper 17 by a certain angle, and then latches the jumper 17 in the first lodgement under the action of the first tensile spring 28 and flat springs 29 fixed on the first rod 20, which reduce harmful amplitude “bounce”.

The rear locking device 14 (see Figs. 1, 2, 4, 16, 17) is made in the form of a second fork-shaped bracket-jib, having a second U-shaped part 30 pivotally connected to the supporting frame 1, to the middle of which the second is fixedly attached at one end a rod 31, at the other end of which a second lodgement is fixedly fixed (see Figure 4), having a second rigid strut 32, a hard stop 33 and a pusher 34. In this case, the second lodgement is made interacting when fixing the rear chassis 8 (see Fig. 16) with the second locking jumper 18, and when unlocked (see Fig.17) - with the axis 35 of the second wheel pair 9 of the front chassis 7.

At the same time, the rear handle 16 of the device for manually unlocking the chassis (see Figs. 2, 4) is mounted on the supporting frame 1 with the possibility of longitudinal movement, is spring-loaded relative to the supporting frame 1 and connected via a rod 36 with a pivot pivotally mounted on the rod 31, 34 made interacting with manual unlocking of the rear chassis 8 with a second locking jumper 18.

The rear chassis 8 in the lower part is equipped with support rollers 37 (see Figs. 1, 5) made interacting with the supporting surface of the pallet 6 inside the vehicle after folding the wheelchair.

The front chassis 7 from the front side of the carrier frame 1 (see FIG. 1) is spring loaded relative to the carrier frame 1 by a second tension spring 38. The rear chassis 8 in the direction of the front side of the carrier frame 1 on one side (see FIGS. 1, 4) is spring loaded relative to the carrier frame 1 with a third tension spring 39, and on the other hand is spring-loaded relative to the second rod 31 of the jib bracket of the rear fixing device 14 with a fourth tension spring 40.

The proposed trolley is operated as follows.

In the vehicle, the trolley is transported in a fully folded position (see Figure 5) on a special tray 6 with a lock (not shown) fixed to the vehicle for fastening the trolley.

After the vehicle arrives at the patient’s intake site, in order to facilitate unloading and loading of the trolley from the outside of the vehicle, the receiving tray 23 of the tray 6 is inclined.

After that, the trolley is unlocked from the pallet 6 and rolled out (see Figs. 1, 6, 7, 8), first automatically unlocking and “dropping” the rear chassis 8 under its own weight and the action of the spring 39, which, having reached the vertical working position, is captured and fixed in this position by the rear locking device 14, getting the second locking jumper 18 (see Figure 4) in its second lodgement between the stop 33 and the rack 32.

Then, continuing to roll out the wheelchair trolley from the passenger compartment of the vehicle, the front chassis 7 is finally “thrown down” and fixed in the open position using the front locking device 13, getting the first locking jumper 17 into its first lodgement between the tooth hook 26 and the upright 24 ( see Figure 3, 7, 8, 13, 15).

In this case, the fixing of the front chassis 7, which is spring-loaded forward, takes place guaranteedly before the front wheel pair 5 comes off the receiving tray 23 by folding back the fork bracket 21 with the copy wheel 22, i.e. the copier wheel 22 is not a supporting element for the front locking device 13.

After that, in the fully unfolded and locked position (see Figure 1), the trolley is ready to transport it to the right place, for example, to the patient or to the hospital.

When loading a patient from the ground, two operators on two sides (front and rear) of the trolley with the help of auxiliary handles (front 15 and rear 16) unlock the chassis and lower the trolley down, folding the front and rear chassis back. After loading the stretcher with the patient on the trolley and fixing them relative to the trolley using the stop 11 and the clamp 12, its support frame 1 along with the stretcher and the patient is lifted.

In this case, the swivel chassis front 7 and rear 8 are automatically returned to their original unfolded position and fixed.

After that, the operator, holding the carrier frame 1, transports the patient in the desired direction, pushing the trolley in front of him to the vehicle (while applying force in only one direction in the horizontal plane).

When loading the trolley into the vehicle (see Figs. 9, 10, 11, 12), the front chassis 7 folds automatically after the contact of the copy wheel 22 with the receiving tray 23. This raises the rod 20 of the front locking device 13 (see Fig. 14) and unlocking the front chassis 7.

With further advancement of the trolley to the receiving tray 23, the front chassis 7 is retracted and the axis 35 of the second wheelset 9 (see Fig. 16, 17), pressing the second rigid rack 32, raises the rod 31 of the rear locking device 14, thereby producing unfastening the rear chassis 8 and ensuring its folding.

After the final folding of the trolley and its rolling into the vehicle interior, it is fixed relative to the pallet 6 using a lock (not shown in the drawing).

After that, the trolley with the stretcher and the patient are completely ready for further transportation with the help of a vehicle.

The use of the invention allows to provide:

1. Improving the reliability of the trolley by simplifying its design and reducing the number of heavily loaded parts and assemblies while providing automatic (operator-independent) control of the front and rear chassis when they are locked / unlocked.

2. To increase manufacturability and reduce the cost of manufacturing trolleys while maintaining ease of use.

3. To ensure simplicity and reliability of fixing the chassis with a minimum number of transitional parts due to the implementation of the locking devices in the form of simple swinging spacer brackets-jib with the same metric parameters.

4. To minimize the risk of unforeseen spontaneous "folding" of the chassis with the patient and the role of negative subjective factors when driving the trolley due to the implementation of a simplified scheme of the mechanisms of the trolley-wheelchair during entry / exit operations from the vehicle with the original sequence of interactions of these mechanisms with each other and others wheelchair cart elements.

Claims (2)

1. A trolley under a removable stretcher for a sanitary vehicle, comprising a supporting frame with a front cross member, with a middle cross member, with a rear cross member and with a first pair of support wheels configured to interact with a pallet fixedly mounted on the vehicle, mounted on a supporting frame with the possibility of rotation of the front and rear chassis with, respectively, the second and third pairs of support wheels at their lower ends, a device for mounting a stretcher on a trolley, a lock for attaching a trolley to extensions with a stretcher on the pallet, front and rear locking devices for the front and rear chassis, respectively, a device for manually unlocking the chassis when loading the patient, made in the form of front and rear handles connected respectively to the front and rear locking devices, characterized in that the front and rear chassis are equipped with the first and second locking jumpers fixedly fixed in their upper parts, respectively, the front locking device is made in the form of a first fork-like bracket- a braid having a first U-shaped part pivotally connected to the supporting frame, to the middle of which a first rod is fixedly attached at one end, at the other end of which a swinging-wheel mounted on a pivotally mounted and spring-loaded bracket-bracket is made, interacting with the receiving tray the pallet, to the same end of the first rod is attached the front handle of the device for manually unlocking the chassis, and on the first rod the first lodgement is fixedly fixed, having the first rigid the first rack and the tooth-hook, spring-loaded relative to the first rod, relative to the first rod, the tooth-hook made with the possibility of interacting with its bevel with the first locking jumper of the front chassis, mounted to interact with the flat springs mounted on the first rod, the rear locking device is made in the form of a second a fork-shaped bracket-jib having a second U-shaped part pivotally connected to a supporting frame, to the middle of which a second leg is fixedly attached at one end ha, on the other end of which a second lodgement is fixedly fixed, having a second rigid strut, a hard stop and a pusher, while the second lodgement is made interacting when fixing the rear chassis with the second locking jumper, and when unlocking with the axis of the second wheel pair of the front chassis, while the rear the handle of the device for manual unlocking of the chassis is mounted on the supporting frame with the possibility of longitudinal movement, is spring-loaded relative to the supporting frame and is connected by a rod with a swivel pivotally mounted on the rod a roller made by interacting with manual release of the rear chassis with the second locking jumper, the middle chassis on the front side of the carrier frame is spring loaded relative to the carrier frame by a second tensile spring, the rear chassis in the direction of the front side of the carrier frame is spring loaded on one side with a third tensile spring, and with the other side is spring-loaded relative to the second rod of the jib bracket of the rear fixing device with a fourth tension spring. 2. The trolley according to claim 1, characterized in that the rear chassis in the lower part is equipped with support rollers made interacting with the supporting surface of the pallet inside the vehicle after folding the trolley.

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