RU117806U1 - TROLLEY WITH REMOVABLE STRETCHES - Google Patents

Abstract

1. A trolley with a removable stretcher, containing a supporting frame with a first pair of support wheels rigidly fixed on it, a front and rear chassis with a second and third pair of support wheels, as well as a mechanism for turning the front and rear chassis, characterized in that the mechanism for turning the chassis contains brackets pivotably fixed between the vertical struts of each chassis and the supporting frame, each bracket consists of two parts connected to each other with the possibility of pivoting, while the brackets of the first chassis are mounted with the ability to interact with pedals that are fixed on the vertical struts of the front chassis. ! 2. A trolley with a removable stretcher according to claim 1, characterized in that the supporting frame of the trolley and the chassis are made of duralumin profile. ! 3. A trolley with a removable stretcher according to claim 2, characterized in that the product assemblies are fastened together by means of bolted connections hidden inside the profile.

Description

The utility model relates to the field of medicine and can be used to transport sick and injured people from the place of loading to the emergency medical care vehicle (ground, water, air), inside the vehicle when unloading from it and delivered to a stationary clinic, as well as for further transportation inside the clinic to the place of patient unloading.

Various designs of stretcher trolleys are known for transporting patients. However, the field of use of known 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.

For example, the trolley according to the patent of the Russian Federation for utility model No. 16996 dated July 27, 2000 contains a removable stretcher and a receiving device. The trolley has three pairs of wheel supports, one of which serves as the primary rolling support when loading the trolley into a vehicle. The trolley also contains a pair of wheels of the front chassis and a pair of wheels of the rear chassis. The chassis is connected to the storage mechanism, triggered by contact with the copier wheel. At the same time, the chassis has two folding options. With one of them, both chassis fold back. In another embodiment, the chassis folds out in different directions. This ensures that the front panel in the head and the rear panel in the foot are lifted in five lockable positions. Removable stretchers consist of a frame, a mattress and a mattress pad, while the angle of the head of the stretcher is regulated by a telescopic lock.

The specified trolley is difficult to manufacture and operate.

Also known is a trolley for removable stretchers for a sanitary vehicle according to the patent of the Russian Federation for utility model No. 54775, A61G 1/02, 2006. The trolley contains a supporting frame with three crossbars and with two front support wheels. They are fixed with the possibility of rotation of the copier wheel. This wheel is deflected after contact with a pallet fixedly mounted on the vehicle, and drives a rotation mechanism mounted on a carrier frame with the possibility of turning the front and rear chassis with pairs of support wheels at the lower ends. The cart also contains front and rear locking devices for the front and rear chassis, respectively, and a device for manually unlocking the chassis, made in the form of 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 commercially available wheelchairs of this design, the kinematic complexity of the mechanisms that fix the support chassis in the working and especially in intermediate height positions of the frame, at which the static load in the support elements many times exceeds the patient’s weight, revealed ultimately reduces the reliability of the design of the trolley.

The closest technical solution to the proposed trolley with a removable stretcher can be considered the trolley according to the patent for the invention No. 2321383 from 08.24.2006

The trolley contains a supporting frame with front, middle and rear crossbars and with the first pair of support wheels

The front and rear chassis with the second and third pairs of support wheels at their lower ends, a device for mounting a stretcher on a wheelchair, a lock for mounting a wheelchair with a stretcher on a pallet, front and rear locking devices for front and rear chassis, respectively, as well as a device for manually unlocking the chassis when loading the patient.

The front and rear chassis are equipped with swing mechanisms, which respectively comprise the first and second locking jumpers in the form of a fork-like jib bracket and a U-shaped part pivotally connected to the supporting frame. The first rod is fixedly attached to the middle of the U-shaped part at one end, at the other end of which a swinging-wheel-mounted swivel bracket is mounted pivotally mounted and spring-loaded relative to the first rod. The copier wheel is configured to interact with the receiving tray of the vehicle pallet. The first lodgement is fixedly fixed on the first bar. The first lodgement has a first rigid strut and a tooth-hook, spring-loaded relative to the first rod, swinging on the axis. The tooth hook is made with the possibility of interacting with its bevel with the first locking jumper of the front chassis. The first locking jumper is installed with the possibility of interaction with flat springs. Flat springs are fixed on the first bar. At the other end of the second rod, the second lodgement is fixedly fixed. The second lodgement is made for interaction 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 disadvantage of the prototype is the complexity of the design and the rigid dependence of the design on the height of the tray of the pallet mounted on the vehicle for receiving the installation of the stretcher. The height of the tray depends on the make of the machine and the relief of the surface on which the wheelchair drives up to the machine. As a result, most often the automatic folding mechanism does not work. In addition, a very short distance from the copy wheel to the front chassis in some cases does not allow the latter to be fixed in a vertical position before the support wheel exits the pallet tray. As a result, the front chassis folds again and the gurney pecks on the ground.

The automatic storage mechanism is mounted (front and rear jib brackets, each connected to two wheel struts) directly under the stretcher, which excludes the possibility of placing useful capacity under the stretcher, for example, for various rescue equipment.

In addition, in the prototype, the chassis and the supporting frame are made of steel pipe, which complicates the connection of nodes with each other.

In the proposed utility model, the problem is solved to increase the efficiency of use of the trolley - wheelchair by simplifying the design and increasing the reliability of the trolley mechanisms during operation by improving the chassis rotation mechanism.

This result is achieved by the fact that in a trolley with a removable stretcher containing a supporting frame with a first pair of support wheels rigidly fixed on it, a front and rear chassis with a second and third pair of support wheels, as well as a front and rear chassis turning mechanism, characterized in that the chassis rotation mechanism contains brackets that are rotatably mounted between the vertical struts of each chassis and the supporting frame, each bracket consists of two parts that are rotatably interconnected, at m first chassis brackets are mounted to cooperate with pedals (instead of wheel-copier) which are fixed to the uprights of the front chassis.

In addition, the supporting frame of the trolley and chassis are made of duralumin profile, the nodes of the product are fastened together by means of bolted connections hidden inside the profile.

Rigid mounting on the frame of the first wheelset and the presence of a pedal acting on the rotation mechanism of the front and rear chassis with wheels increases the reliability of the rotation mechanism, as provides its operation at various heights of the receiving tray of the vehicle. Reliability and stability also provides mounting brackets of the rotation mechanism on opposite sides of the supporting frame.

The proposed mount frees up the space directly under the stretcher, which allows it to be used to place a useful container there, for example, for rescue equipment or personal belongings of the patient.

The implementation of the supporting and supporting parts of the duralumin profile allows us to simplify the design and manufacturing technology of the product, because provides the ability to connect nodes not only by welding, but also by bolt fasteners, which can be placed inside the profile.

Introduction of new elements to the design of the trolley-wheelchair can significantly increase the operational efficiency of the trolley-wheelchair.

The invention is illustrated by drawings, which show:

Figure 1 is a side view of the trolley;

Figure 2 is a front view of the trolley;

Figure 3 is a bottom view of the trolley;

Figure 4 - sequence of the addition of the trolley

The proposed trolley with a removable stretcher contains a supporting frame 1 (see Fig. 1, 2, 3). A removable stretcher 2 with handles 3 is placed on the frame 1. On the frame 1, the front wheelset 4 is rigidly fixed, shortened, and two H-shaped chassis with pairs of wheels at the ends are fastened with rotation: front 5 and rear 6.

Between the vertical struts of the chassis 5 and 6 and the supporting frame 1, spring-loaded brackets of the chassis rotation mechanism are fixed. Each bracket consists of two parts 7 and 8, 9 and 10, interconnected to rotate. The brackets are made on opposite sides of the trolley and are mounted on the supporting surfaces with the possibility of rotation.

The front parts of the brackets 7 are connected to the pedals 11, which are mounted with the possibility of interaction with a pallet (not shown), motionlessly mounted on the vehicle and intended for installation on it of a trolley. When changing the position of the pedals 11 after contact with the pallet, the first parts 7 of the brackets rotate and pull the chassis 5 behind them.

The carrier frame is equipped with devices 12 for fixing / unlocking a removable stretcher with a trolley and devices for changing the position of the front and rear parts of the stretcher (not shown).

The stretchers are equipped with retractable handrails 13.

The supporting frame 1 and the chassis 5 and 6 are made of duralumin profile (unlike the prototype, where these nodes are made of steel pipes), which, while maintaining strength, significantly reduce the cost and facilitate the design of the trolley. The use of a duralumin profile, in addition, made it possible to use not only a welding joint, but also bolted joints and to place all fasteners inside the profile.

A similar design of the wheelchair got a denser and more color-saturated image, and it was also possible to place various visual information on the surface of the profile.

The proposed trolley is operated as follows.

When loading a patient from the ground, two operators on two sides (front and rear) of the trolley by pressing the pedals 11 and parts of the brackets 9 and 10 unlock the chassis 5 and 6 and lower the trolley down, folding the front and rear chassis back. After loading the stretcher with the patient on a trolley and fixing them relative to the trolley, the supporting frame 1 together with the stretcher and the patient is lifted. In this case, the swivel chassis front 5 and rear 6 automatically return to their original unfolded position and are 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 in the vehicle (see Figure 4), the front chassis 5 folds automatically after the pedal 11 contacts the receiving tray of the vehicle. In this case, the parts of the brackets 7 and 8 are added, the front rod 5 is lifted, its effect on the rear rod 6, the parts of the rear bracket 9 and 10 are added, and the wheel trolley is added (Fig. 4).

After the final folding of the trolley and its rolling into the vehicle interior, it is fixed relative to the pallet 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.

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

After that, the trolley is unlocked from the pallet and rolled out. In this case, the automatic release and "throwing down under its own weight and the action of the springs of the front and rear chassis

In this case, the fixing of the spring-loaded front chassis 5 is guaranteed earlier than the front wheel pair 4 has exited from the receiving tray

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.

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 the fixation of the chassis with a minimum number of transitional parts.

4. To minimize the risk of unforeseen spontaneous "folding" of the chassis with the patient due to the original sequence of interactions of the mechanisms of folding the chassis with each other and other elements of the trolley.

5. To increase the efficiency of use of the trolley by eliminating the dependence of the mechanism of folding the chassis of the trolley on the height of the tray of the receiving device of the vehicle.

Claims (3)

1. A trolley with a removable stretcher, comprising a support frame with a first pair of support wheels rigidly fixed on it, a front and rear chassis with a second and third pair of support wheels, and a front and rear chassis rotation mechanism, characterized in that the chassis rotation mechanism contains brackets, mounted rotatably between the vertical struts of each chassis and the supporting frame, each bracket consists of two parts that are rotatably interconnected, while the brackets of the first chassis are mounted with the ability to interact with pedals that are mounted on the vertical struts of the front chassis. 2. The trolley with a removable stretcher according to claim 1, characterized in that the supporting frame of the trolley and chassis are made of duralumin profile. 3. A trolley with a removable stretcher according to claim 2, characterized in that the nodes of the product are fastened together by means of bolted connections hidden inside the profile.