RU58910U1 - CARRIAGE TROLLEY UNDER REMOVABLE STRETTERS FOR SANITARY VEHICLES - Google Patents

Abstract

A trolley for removable stretchers for an ambulance vehicle is proposed, designed to transport sick and injured people both to an ambulance ambulance (land, water, air) and inside the vehicle, when unloading from it and delivered to a stationary clinic (hospital), as well as for further transportation inside the clinic (hospital).

This wheeled trolley contains a supporting frame with three crossbars and with two front support wheels made interacting with a pallet, fixedly mounted on a vehicle, mounted on a supporting frame with the possibility of turning the front and rear chassis, equipped with locking jumpers and pairs of supporting wheels on their lower ends, a device for attaching a stretcher to a trolley, a lock for mounting a trolley with a stretcher on a pallet and two (front and rear) locking devices for, respectively, ednego and rear chassis.

The front locking device is made in the form of a first fork-shaped bracket-jib, having a first U-shaped part hingedly connected to the supporting frame, to the middle of which the first rod is fixedly attached at one end, at the other end of which a fork-bracket is pivotally mounted and spring-loaded relative to the first rod a swinging copier wheel made by interacting with the receiving tray of the pallet, the front handle of the device for manually unlocking the chassis is attached to the same end of the first rod 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 with a first tension spring and made by interacting with a bevel with the first locking jumper of the front chassis, also made with flat springs fixed to the first barbell.

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 having a second rigid strut is fixedly fixed at its other end, 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.

The rear handle of the device for manual unlocking of the chassis is mounted on the supporting frame with the possibility of longitudinal movement, spring-loaded relative to the supporting frame and connected via a rod with a pivot pivotally mounted on the rod, made interacting with manual unlocking of the rear chassis with a second locking jumper.

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 clamp fixing bracket-bracket of the fourth spring stretching.

Using the proposed utility model can improve the reliability of the trolley by simplifying its design.

1 n.p.ph., 1 s.p.ph., 7 l. ill.

Description

The utility model relates to the field of medicine and can be used to transport sick and injured people both from the place of loading of the sick or injured to the ambulance ambulance (land, water, air), and inside the vehicle, when unloading from it and delivery to a 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”, the company “Dolgoprudnensky Scientific and Production Research”, 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 N 2102053, A 61 G 1/02, 1996; RF patent N 2141811, A 61 G 1/02, B 62 V 3/00, 1997; U.S. Patent No. 4,192,541, A 61 G 1/02, B 62 V 3/02, 1978; U.S. Patent Nos. 1,544,281, B 62 B 3/02, 1976; N 1535395, B 62 B 3/02, 1978; N 2283415, A 61 G 1/02, 1993; N 2289113, A 61 G 1/02, 1994; German application N 29502088.1, A 61 G 1/02,

1995; U.S. Patent Nos. 5,365,622, A 61 G 1/02, 1992; N 5435027, A 61 G 1/02, 1995, WIPO application N 2004028432, A 61 G, 2005 and others.

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 and quite inconvenient for medical personnel when folding and rolling 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 N 54775, A 61 G 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, respectively, the front and rear chassis and a device for steering hydrochloric 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 intermediate height positions of the frame was revealed, at which the static load in the support elements is many times greater than the patient’s weight, which ultimately reduces the reliability of the design of the trolley.

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

When implementing this utility model, 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 highly loaded parts and assemblies while maintaining automatic (independent of the operator) 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 the known trolley 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 attaching a stretcher to a trolley, a lock for attaching a trolley with a stretcher to a pallet e, 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 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 with a first tension spring, made by interacting with its bevel with the first locking jumper of the front chassis, also interacting with flat springs fixed 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 this, the rear handle of the device for manual release of the chassis

mounted on a supporting frame with the possibility of longitudinal movement, spring-loaded relative to the supporting frame and connected via a rod with a pivot pivotally mounted on the rod, made interacting with manual unlocking of the rear chassis with a second locking jumper;

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 inventive utility model 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;

- figure 9 shows the position of the trolley before rolling it into the vehicle at the moment of touching the copy wheel of the pallet receiving tray;

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

- figure 11 shows the continuation of the rolling of the trolley in the vehicle at the time of swinging folding the rear chassis after its release;

- 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 a sanitary 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 a 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 the front 13 and rear 14 locking devices. The front 7 and rear 8 chassis are equipped with fixed jumpers fixedly fixed in their upper parts, respectively, of the first 17 and second 18.

The front locking device 13 is made (see Fig. 1, 2) in the form of a first fork-like bracket-jib, having a hinge

connected to the supporting frame 1, the first U-shaped part 19, to the middle of which the first rod 20 is fixedly attached at one end, at the other end of which the fork-bracket 21 is pivotally mounted and spring-loaded relative to the first rod 20 (see Figs. 3, 8) swinging wheel-copier 22, made interacting (see Fig. 9) with the receiving tray 23 of the pallet 6. To the same end of the first rod 20 is attached the front handle 15 of the device 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 a 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 pallet 6 is inclined.

After that, the trolley is unlocked from the pallet 6 and rolled out (see Fig. 1, 6, 7, 8), first automatically unlocking and

"casting" back under its own weight and the action of the spring 39 the rear chassis 8, which, reaching 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) into its second lodgement between the stop 33 and the stand 32.

Then, continuing to roll the trolley out of the vehicle interior, they finally “throw” it down and fix the front chassis 7 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 Fig. 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 wheelchair with the help of auxiliary handles of the front 15 and rear 16 unlock the chassis and lower the wheelchair 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 on 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 unlocking the rear chassis 8 and ensuring its folding.

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

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

Using the proposed utility model allows you 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 (independent of the operator) control of the front and rear chassis when they are fixed / 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 three cross members: front, middle and rear, and with a first pair of support wheels made interacting with a pallet fixedly mounted on the vehicle, rotatably mounted on the supporting frame front and rear chassis with, respectively, 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 front and rear chassis, respectively, a device for manually unlocking the chassis when loading the patient from the ground, 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 stationary fixed in their upper parts, respectively, by the first and second locking jumpers, the front locking device is made in the form of a first fork-like bracket-jib having hinges but the first U-shaped part connected to the supporting frame, to the middle of which the first rod is fixedly attached at one end, on the other end of which a swinging wheel mounted on a pivotally mounted and spring-loaded relative to the first rod bracket, made by interacting with the receiving tray of the pallet, the front handle of the device for manually unlocking the chassis is attached to the same end of the first rod, in addition, the first lodgement, having the first rigid strut and swinging, is fixedly mounted on the first rod an axial tooth spring loaded relative to the first rod with a first tension spring, made by bevel interacting with the first locking jumper of the front chassis, also interacting with flat springs mounted on the first rod, 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 stationary rod at the other end of which a second lodgement is fixed, having a second rigid stand, 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 unlocked, with the axis of the second wheel pair of the front chassis, in addition, the rear handle of the device for manual unlocking the chassis is mounted on the supporting frame with the possibility of longitudinal movement, is spring-loaded relative to the supporting frame and connected via a rod with a pivot pivotally mounted on the rod, made by interaction when manually unlocking the rear chassis with a second locking jumper, the front chassis on the front side of the carrier frame is spring loaded relative to the carrier frame with a second tensile spring, the rear chassis in the direction of the front side of the carrier frame is spring loaded on the one side with the third tension spring, and on the other hand is spring loaded relative to the second rod of the bracket-jib of the rear locking 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.