DE29513788U1 - Hand sweeper - Google Patents

Description

Hand sweeper

There are several versions of hand sweepers that are also suitable for private use. The machines are pushed with a handle, similar to a lawn mower, and convey the sweepings into a collecting container.

The sweeping system works either according to the dustpan principle or with counter-rotating double sweeping rollers or disc brushes.

If the floor is not smooth, e.g. in a paved yard where sand and earth need to be swept, the cleaning effect is worse than with a simple broom.

The machines require a lot of space, are complex and expensive, as they are derived from industrial sweepers.

The aim of the new development is a simple sweeper for private use, which can achieve a similar result to a broom, but in a way that is easy on the body and back. The space required should be smaller, the structure should be simpler and cheaper, and modular for different requirements.

In the basic version (Fig. 1 and 2), the new sweeper consists of two drive wheels coupled via an axle, which drive the sweeping roller (1) via two intermediate wheels (2) and a freewheel. The sweeping unit is moved via a height-adjustable ergonomic handle.

The height of the sweeping roller is controlled by the long diagonal bar, the pressure on the drive wheels and the brush and part of the thrust is introduced via the handle tube angled forward. The handle arrangement is similar to that of a scythe, the height control is sufficiently even across the outstretched arm. Compared to a simple brush, the raised handle greatly reduces the need to bend downwards and thus the strain on the back.

In contrast to the well-known hand sweepers, which are only pushed, the operator here applies a controllable pressure force to the wheels and brush. With a harder brush, a more intensive effect can be achieved that can be adjusted to the level of dirt.

A pressure load through weights is not advisable, since easy dynamic handling should be possible, e.g. lateral displacement or forward and backward movement.

A key advantage of the rotating sweeping roller compared to the broom is that the peripheral speed in the forward direction is approximately doubled. This means that a sufficient result is achieved even after the first sweep; with the appropriate brush design, no more stuck debris falls onto the cleaned surface, as is the case with a broom.

However, for the circumferential speed to be doubled in the forward direction, twice the thrust must be applied, the drive wheels must deliver a force that is twice as great as the circumferential force of the brush, so the total thrust is three times the circumferential force of the brush. Therefore, energy-saving, individual pressure on the drive wheels and the brush is advantageous.

The force is applied more ergonomically thanks to the handle design than with a simple broom, and in particular there is no rotating strain on the spine as is the case with sideways sweeping.

In the extended version according to Fig.3, a collecting container (7) with a sweeping lip (8) is attached to the cleaning unit, the rotating mounting point is in the middle of the brush, so that the brush can also be controlled lower or higher here. With suitable surfaces and dirt, this enables quick sweeping; without the collecting container, sweeping is more thorough than with a broom. Parking is made easier by removing the collecting container; the container can be purchased as an option.

Fig.4 shows the laterally offset arrangement of the sweeping roller to the drive wheels, which enables better edge sweeping.

In Fig.5 (1) is the sweeping roller, (2) the intermediate gears that are required to get the roller over the diameter of the drive wheels.

(3) are needle cages (unlubricated) which ensure smooth running, even in relation to plastic bores.

(4) is the adjustment knob for the height adjustment and the space-saving storage position.

Fig.6 shows the freewheel function with axially movable faceplates with sawtooth profiling and the associated compression spring.

Fig.7 shows the sweeper with large and small standard people, (Central Europeans, 80% / 20%)

Fig.8 shows the minimal design, with the roller brush between the drive wheels. This is the simplest design that uses the advantage of rotating brushes. Freewheeling is not provided here, so sweeping can also be done when pulling back, e.g. backwards in front of a barrier. It is also possible to attach a collecting container.

Claims (5)

Claims t 1. Hand sweeper with sweeping roller, characterized in that in a basic version a unit is formed from the drive wheels, the sweeping roller and a handle bar rigidly connected to it. 2. characterized in that the handle bar is adjustable in the articulation angle for different operating heights to the unit consisting of drive wheels and sweeping roller. 3. characterized by the ergonomic design of the handlebar, consisting of a long diagonal bar for the main function of straight height guidance and a connected, forward-angled handlebar with a handle pointing to the side towards the operator, mainly for applying pressure and thrust. The handlebar is similar to the arrangement of the handles on scythes. 4.characterized in that a collecting container (7) can be pivotally attached to the base unit and that the bearing point on the sweeping unit is on the sweeping roller axis. 5. characterized in that the sweeping roller is arranged in front of the drive wheels on one side flush with the drive wheel.