RU2137647C1 - Trolley - Google Patents

Abstract

FIELD: household appliances; railless vehicles for carrying domestic loads. SUBSTANCE: trolley has wheels, load platform with rigid three-dimensional body provided with cover. It has also seamless runners at sides for sliding along steps with downward bend near wheels. Runners form rear wall of body with upward extension in form of U-shaped bracket. Front extension of runners at the bottom is made to wavy line with upward bend under front part of body. Trolley is provided with bracket with folding handle. Axle of wheels is made for displacement forward-rearward along body by means of bushings installed for movement with lock on side faces of body bottom provided extreme position of wheel rim at the level of body rear wall, inside or outside the body. Trolley can be used for carrying a child with parcels. When necessary, trolley can be covered by umbrella and can be used as seat for rest. EFFECT: enlarged operating capabilities. 4 cl, 10 dwg

Description

 Hand carts manufactured by industry, as well as those for which patents have been granted, but they have not yet been implemented, significantly facilitate the life of a person in everyday life. However, they are still far from perfect. Every day we see how difficult it is for a person with a hand truck to transport goods along the stairs, when crossing the street and entering the city transport. The cart jumps on the steps of the stairs, causing an additional load on the person’s hands, and sometimes you just need to drag it along with the load like a suitcase or backpack, which is simply beyond the power of older people. It is especially difficult on the road with a handcart, for example, a woman with a young child.

 The following are some analogues of handcarts registered in the world. So, in Russia, declared "Walking wheeled chassis" for N 736054 / 27-11 from 06.27.61, in the form of a cross with wheels, which allows you to climb the stairs both in houses and on the street.

 This technical solution greatly facilitates the transportation of household goods, but does not solve this problem optimally as a whole. So, with steps of great height, for example, on a bus, it’s impossible to drive a hand truck with a cross-shaped chassis into the interior of the bus, but if it is still constructively implemented, the device will turn out to be very heavy and bulky.

 In addition, since the cross-shaped chassis cannot have large-diameter wheels, additional physical effort will be required from its owner when driving on rough roads.

 The cross chassis, all other things being equal, makes the dimensions of the hand truck more significant.

 According to US patent 5564720 from 11/15/96, a portable folding trolley is proposed.

 Its disadvantage is the inconvenience of transporting goods by flights of stairs. In order for the wheels not to hit the steps, the trolley must be lowered gently, and this will require a lot of effort and additional time.

 In England, GB 2167360A of 05.29.86 proposed a hand truck for the transport of goods, which has a device for smooth movement along the stairs in the form of strips with balls that are moved along the support bracket.

 The disadvantage of this device is that with the help of these slats you can smoothly overcome only a few steps, then you need to lift the trolley by the handrails to lower the slats to their original position near the wheels. This is during the descent. When lifting the trolley up the stairs, everything is much more complicated.

The hand truck does not have slides at the front, which significantly limits the freedom of maneuvering it when crossing the street, boarding a bus, etc., since it is necessary to turn it 180 ^° every now and then under crowded traffic and vehicles.

 In addition, the platform of the trolley is located above the wheels, which makes it less stable compared to the trolleys in which it is installed between the wheels.

 The closest analogue, i.e. The prototype application for an invention is French patent N 2582606 of March 20, 1985.

 According to this patent, the smooth movement of the hand truck along the steps of the stairs is guaranteed by rails mounted in the rear of the truck at the level of the wheel rim, and, as stated in the patent, the "wheels" are firmly fixed.

The specified device handcart has the following disadvantages:
- does not provide smooth sliding for a number of stepped obstacles encountered. So, when lowering a hand truck from a passenger transport, for example, from a bus, if it stops near the sidewalk, the front of the truck can jam in the ledge of the stone lining, since there are no smooth sliding rails in front of the truck. When lifting the trolley to the steps of the bus when rolling it from the sidewalk onto the road, the trolley will fall if you do not hold it with your hands.

When crossing the street, a similar situation will be created if you do not turn the trolley 180 ^° on the way, which is extremely undesirable to do in the crowd of people walking nearby and in anticipation that the standing transport is about to start moving.

When driving through narrow ditches facing hard material, for example, gutters, where there are no conditions for 180 ^o maneuver, shock loads on the trolley simply cannot be avoided.

 In addition, the slide rails on the hand truck are set at the rear in the middle of the bracket, and not at the edges, which makes it unstable in the lateral direction when transported along the stairs.

 - The design of the trolley, having "firmly fixed wheels", does not allow, individually, taking into account the nature of the load and the person’s height, to obtain the minimum handle pressure on the person’s hands by the fitting method "by eye", which is undesirable especially for elderly people and in situations when the load needs to be transported over a long distance.

 - The handcart does not allow, along with the transportation of goods, to transport a young child, when there is a special need for it, and also to sit on it for resting on the road.

 A hand trolley is proposed, when using which a person spends less time on the journey and, most importantly, less physical effort compared to existing hand trolleys naturally under equal conditions of cargo transportation.

 The essence of the innovation is that the design of the hand truck provides for the possibility of re-arranging it in a matter of seconds, depending on the nature of the road ahead and the type of cargo being transported. Preparation of a hand truck to the road consists of moving the wheels forward or backward in the direction of travel relative to the rear wall of the body in order to transfer the center of gravity of the transported load as close as possible to the vertical axis of the wheels.

 This allows you to have minimal pressure on the hands of a person while tilting the folding handle together with the body.

Since the angle of inclination of the bracket with a folding handle varies within wide limits (up to 30 ^o ), and this is mainly due to the growth of a person, saving physical energy with a personal "fit" of the undercarriage of the hand truck will be very significant.

 The physical energy of a person and travel time are also saved on the fact that the back, bottom and front of the body of the hand truck is equipped with a device that allows wheel blows on steps, such as street crossings, to minimize, and in some cases, to make the movement of the hand truck smooth due to slip on them.

A device for sliding a hand truck in any direction and on any stepped road, starting from the house stairs and ending with the entrance to the bus, allows you not to turn the hand truck in the direction of travel 180 ^o , which is extremely important for heavy traffic of people and vehicles at the crossings.

 So, depending on the fact that it’s more important for a person to have a minimum load on his hands, which occurs with a long smooth road, or to overcome stepped transitions, which is desirable with smooth sliding, or partially both, the wheels are fixed in the right position relative to the back wall bodywork.

Distinctive features are:
- Installation of front, bottom and rear on the sides of the body of the hand truck of seamless sliding runners.

 - Variable locking of the wheels at the level of the rear wall of the body, front or rear of it, by means of clamps, for example screw, mounted on the adapter bushings connecting the axle of the wheels with the lower longitudinal side faces of the body of the truck.

 - Placement in the inner cavity of the folding handle of the awning to protect the child sitting on the back of the hand truck with the possibility of opening it by pushing it forward in a horizontal position on the hinges installed above.

 In FIG. 1 shows a hand truck with a load prepared for movement (side view).

 In FIG. 2 shows a hand truck with cargo in the back; the bag on the back is conditionally removed (rear view).

 In FIG. Figure 3 shows a hand truck with a bag in the body, pushed up through the open lid (side view).

In FIG. Figure 4 shows the movement of a hand truck on a ladder from bottom to top or top to bottom (side view). The wheels are fixed at the bracket level:
a) the beginning of the movement, the angle of the step touches the skids of the body bracket,
b) the angle of the step changes smoothly to the wheels,
c) the wheels are raised a step.

In FIG. Figure 5 shows the movement of a hand truck along a street passage from right to left:
a) the start of movement, the angle of the step touches the skids of the bracket of the body,
b) movement on a flat part of the transition,
c) the end of the movement, the front of the slide rails in contact with the pavement lining. The movement of the hand truck from left to right can be performed without turning it 180 ^o .

 In FIG. Figure 6 shows the movement of a hand truck through narrow ditches lined with hard material.

 Figure 7 shows the starting position of the hand truck before lifting on passenger transport.

 On Fig shows a hand truck with a child on the roof of the body and an open tent above it.

 Figure 9 shows an isometric disclosed tent.

 In FIG. 10 shows a hand truck with a person sitting on a roof.

 The technical solution of the proposed manual trolley is compared with similar existing models of medium complexity. The components that make it up are mastered by industry; moreover, the developed model of a handcart for 70% consists of parts in production. The technology is extremely simple. For enterprises that produce handcarts with a carrying capacity of 10-20 kg, this type of product can be mastered especially quickly.

 The hand truck (Figs. 1–3) consists of a volumetric rigid body 1 with solid runners 2 attached to it on the sides at the front, bottom and back, turning into a U-shaped bracket 3 with a folding handle 4. Wheels 5 connected by an axle 6 are installed on the sides of the body 1 (section along AB) with the help of adapters 7 moving along the lower longitudinal faces 8 of the body 1 (section along the SD). The body 1 is octagonal, having two lower longitudinal faces 8 and two upper ones on the sides. The lateral faces are rigidly connected at the corners by vertical uprights, which are fastened in front with the front of the runners 2, and in the back are aligned with the same runners passing into a U-shaped bracket 3. A hinged lid 10 with hinges 11 is installed on top of the body 1. A folding duffel bag 12 is placed inside the body 1. To hold the bag 12 in the body 1, a guard in the form of rods 13 and 14 from the bottom is installed on its sides (section along AB). In front, the hand truck has a support bracket 15 connected laterally to the front of the slide rails 2. Adapters 7 in their upper part have a locking device, for example in the form of a screw 16. A folding storage bag 12 with the lid 10 open can be pulled up (unfolded) upwards (Fig. .3). With the lid 10 closed, a bag 17 can be mounted on it and fixed with rubber bands 18. An awning 19 (Fig. 2 and 8) is installed in the inner cavity of the folding handle 4, which can be rotated and fixed horizontally with hinges 20 (Fig. 9) position. A safety belt 21 (Fig. 8) is installed on the bracket 3 of the hand truck, having a length-adjusting device 22 and a spring latch 23 (IR cut).

 The operation of the hand truck is as follows.

 A loaded hand truck, depending on the type of cargo being transported and the nature of the path ahead, should be “tuned to the road”.

 For this wheel, it is necessary to put relative to the rear wall of the body 1 in one of three positions: "a", "b" or "c" (section along the SD) and fix it with a screw clamp 16.

 The position of the wheels "a" - corresponds to the alignment of the rim of the wheels with the rear part of the skids and ensures smooth sliding of the hand truck on step transitions.

 The position of the wheels “in” or “c” - corresponds to the position of the wheel rim behind the slide rails or in front of them, respectively, which is advantageous when working with a hand truck on a flat road and long distances, as it saves the person’s physical energy and travel time. The choice of wheel position "B" or "C" is determined experimentally in front of the road.

 On a hand truck you can make the following types of transport.

 - Transportation of goods in a body bag and in a bag mounted on the body (Fig. 1).

 - Transportation of goods in a body bag (figure 2).

 - Transportation of cargo, which in its dimensions requires an increase in the height of the body bag (figure 3).

 - Transportation of cargo in a body bag and, in addition, a child sitting on the body cover (Fig. 8).

 In order to facilitate the management of a hand trolley when laying transported things, products, etc. in the body bag and bag at the same time the heaviest of them should be put down, i.e. in the body bag 12, and the lungs up, i.e. into the bag 17.

 Whenever possible, this principle of the carriage of goods should be followed for all types of use of the hand truck.

 When transporting cargo in a body bag and a child on the body cover should not neglect the seat belt 21 (Fig. 8). The length of the belt should be selected using the adjusting device 22 (IR cut) so that the child is firmly pressed against the back of the bracket 3 and cannot fall off the hand truck, which is unacceptable, especially at street crossings. From the rain and the sun, the child can be covered with an awning 19, for which it must be turned on the hinges 20 from a vertical position (Fig. 2) to horizontal (Figs. 8 and 9).

 In necessary cases, if the driver of the hand truck is tired on the road, he can rest while sitting on the body cover 1 (Fig. 10).

Claims (4)

 1. Hand truck, which includes wheels, a lifting platform, skids and a bracket with a folding handle, characterized in that the lifting platform is made with a rigid volumetric body having a lid, has solid sliding skids on the sides with a bend down the steps near the wheels, behind the runners form the rear wall of the body with a continuation upward in the form of a U-shaped bracket, front from below the continuation of the runners is made in a wavy line with a bend up under the front of the body, the axle of the wheels is made with the possibility w move back and forth along body mounted thereon by means of sleeves slidably mounted on the lock side faces underbody, allowing to have extreme position on the wheel rim at the rear wall of the body, inside or outside the body.  2. The hand truck according to claim 1, characterized in that a duffel bag is installed inside the body with the possibility of extending its upper part with the lid open up to the height necessary for loading goods.  3. The hand truck according to claim 1, characterized in that the body bracket is equipped with a seat belt for the child, permanently mounted on one arm bracket and temporarily using a spring lock mechanism on another.  4. The hand truck according to claim 1, characterized in that inside the folding handle there is a folding tent for protection from rain and sun, with the possibility of extending it using the hinges located at the top in a horizontal position while opening the side and rear panels to secure the latter to vertical racks folding handles.

Images