DE9315021U1 - Children's transport trailer for bicycles - Google Patents

Description

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Michael Kraus
Middle Katzenbergweg 46
97084 Würzburg/Hdf
Phone: 0931/611150

Description:

State of the art:

The child trailers available on the market are either made of bulky, heavy hard shells with tubular frame constructions or collapsible box constructions that can neither be dismantled quickly nor are sufficiently stable against resonance vibrations. If more than one child is being transported, they must sit next to each other, which in most cases leads to intolerance. In some designs, the children sit facing the direction of travel and cannot be seen or supervised by the driver. If a child is being transported, there is hardly any space for any luggage. This means that children can either keep cycling on their bikes when they have already learned to ride a little or do without riding and sit in the child trailer from the start. This disadvantage also comes into play when overcoming sections of the route that are dangerous for children.

Problem:

The invention specified in claim 1 is based on the problem of creating a child trailer that can be folded up very quickly, can be stored in a space-saving manner, can be easily mounted on a car roof rack next to the wheels, which, despite its low weight, has extremely high dimensional stability, so that older children can also be transported with luggage, children can sit one behind the other in the direction of travel, which means that less air resistance and a smaller body width can be achieved, and two children plus a child's bike can be transported.

Benefits achieved:

The invention ensures that the construction absorbs the compressive forces through light aluminum tubes, tensile and bending forces are absorbed by the surrounding steel cable tensioning, and thus an extremely stable frame is created with little material. Seats and backrests are made of tear-resistant but light sailcloth and enable the tubular frame to be folded up to save space.

The rope system can be relaxed and unhooked using a tension lever, so that the frame can be folded up in just a few seconds and takes up little space. This means that the trailer can be easily stored in a space-saving manner and transported on a roof rack at the same time as the bicycles.

Due to the design, the occupants are protected from external forces on all sides by the protective tubular frame.

The seating arrangement behind one another allows sitting facing the direction of travel and an aerodynamically favourable, narrow structure.

At the rear, two cross tubes mounted the width of the tire create a bicycle stand-like mount for the front wheel of the child's bike, allowing the child's bike to be attached and detached quickly and to follow without any problems. Luggage can be stored in the canvas-covered front section as well as in a hanging bag behind the rear seat.

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-3- Description of an example implementation:

The children's rickshaw consists of two parallel main support tubes (drawing on pages 1, 2 and 3) that run 45 cm apart and that converge at the front and are connected to one another with two screws that run through spacer sleeves. Two connecting tubes (drawing on page 2) at the rear keep the main tubes at a distance. Two fabric seats (drawing on pages 1, 2), whose seams are pushed over the main tubes, form the front and rear seats. (Page 2) When unfolded, the backrests (drawing on pages 1 and 3) are formed by two U-shaped aluminum tubes (drawing on page 2) that run parallel to one another and that also have a fabric covering in the upper part. In addition, the rear U-tube holds the axle in the lower part. These U-tubes are screwed to the main tubes so that they can rotate, so that when opened, the backrests protrude upwards and the shorter ends with the axle mount protrude downwards. Two steel cables running around each side lead through holes at the top and bottom of the U-tubes (cable feedthroughs) and are secured with cable clamps. The upper bracing (drawing on page 1) is firmly screwed to the main tubes at the front end with two thimbles. The lower bracing (drawing on pages 1, 2) can be unhooked at the front with a snap hook from a turnbuckle construction (drawing on pages 1, 2). (Unhooking point 1) At the rear, the cables can be unhooked to the side on the left and right through two slots cut diagonally into the side of the main tubes. (Unhooking point 2)

Once the tensioning has been removed from the suspension points, the trailer can be folded up into a flat frame that can be transported on the roof of a car by placing the backrests on the main tubes.

The turnbuckle construction (drawing sheet 1,2) consists of a lever arm and a suspension plate with holes.

The lever arm is made of an aluminum strip bent into two legs, which is connected to the main tubes at pivot point 1 by two screws. The hanging plate is screwed to the lever arm at pivot point 2. If you push the lever arm forward to tension the ropes, you pull it over a dead point so that the tension in the rope presses it onto the main tube connection screw and thus secures it.

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· * · Michael Kraus MM. Katzenbergweg 46 97084 Würzburg/Hdf Phone: 0931/611150

Child transport trailer for bicycles

List of reference symbols

1 Rear seat

2 Front seat

3 Upper tension steel cable 3mm

4 connecting tube footrest)

5 front luggage rack

6 main pipes (aluminium pipe 3Omm0)

7 fabric coverings for the seats and backrests

8 Under tension (steel cable 3mm)

9 U-tube (aluminium tube 25mm0) with axle mount

10 U-tube (aluminium tube 25mm0)

11 Display point

12 Release point 1 (screw carabiner)

13 clamping lever

14 Turnbuckle construction (second main pipe not shown)

15 Hanging pocket

16 rope bushings (with bushings and rope clamps)

17 disc wheels

18 Screw connection of both main pipes

19 Connecting tubes (front wheel mount)

20 Screw connection of both main pipes with fastening of the upper bracing)

21 Perforated sheet metal

22 Screwing the axle to the rear U-tube

23 and 24 Pivot points of the U-tubes (backrests) to the main tubes 25 and 26 Pivot points of the turnbuckle

Claims (7)

-1- Michael Kraus
Middle Katzenbergweg 46
97084 Würzburg/Hclf
Phone: 0931/611150 Protection claims : Children’s rickshaw (child transport trailer for bicycles) characterized by a collapsible tubular frame, which is secured by a rope tension. 2. Children’s rickshaw according to protection claim 1 characterized by two main tubes running parallel across the width of the seat, which converge at the front and the fabric seat surfaces are stretched between the two tubes. 3. Children’s rickshaw according to protection claim 1 characterized by U-shaped tubes that support the fabric covering of the backrests and are screwed to the main tubes in such a way that the U-tubes can be folded onto the main tubes. 4. Children’s rickshaw according to protection claim 1 characterized in that the axle is attached to the lower part of the rearmost U-tube and folds in when folded. 5. Children’s rickshaw according to protection claim 1 characterized by a circumferential steel rope tensioning, which is attached to the upper and lower corners of the U-tubes with cable feedthroughs (sheet 4) and can be separated from the turnbuckle at the suspension point 1 and can be separated from the main tubes in the rear outwards from the notched slots at the suspension points 2. 6. Children’s rickshaw according to protection claim 1 characterized by a tensioning construction, which is screwed between the main tubes that converge at the front and tightens the entire rope tensioning and secures itself by overcoming a lever dead center. 7. Children’s rickshaw according to protection claim 1 characterized by two connecting tubes at the rear, running at right angles to the main tubes, which form a mount for the front wheel of a trailing child's bike. (Page 4)