|
(11) | EP 2 719 654 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||
| (54) | Machine to lift and easily transfer ferric covers of underground networks using neodymium magnets |
| (57) The system used until now when handling these heavy ferric covers were hooks to lift
these covers, or simple levers. When these covers were finally lifted, they were dragged
along the ground due to their heavy weight. The invention consists of a machine, which is a lever and a gripper head. Inside this gripper head , ten magnets are housed. The machine is formed by a handle which is located on the power arm end of the lever. At the other end of this arm is located the wheel support and the wheels. The wheels and their support are the fulcrum of the lever. The resistance arm is joined to the power arm of an 120° angle. On the other end the gripper head is located , where the magnets are housed. How this machine works is as it follows: The first step is to remove the gripper head protective casing. Then put the gripper head approximately on the ferric cover center to lift. After that, exert pressure towards the ground on the handle and then the ferric cover is easily lifted. In order to carry the machine , the wheels are used. To release the ferric cover, upward pressure is exerted on the handle, and then this cover is removed from the machine. |
[0001] Machine to lift and easily transfer sewerage ferric covers, gas network, electricity and telephone network ferric covers using neodymium magnets. The machine is a first-class lever whose power arm supports at its end the gripper head where two magnets are housed, the fulcrum are the wheels and the power arm, near whose end is the handle.
Technical sector.
[0002] The invention falls in the installation and maintenance os sewerage, gas network, electricity and telephone network.
State of the art.
[0003] Nowadays, the methods that are often used are a simple hook, which represents, a great physical effort.
[0004] In other cases, hydraulic forklifts are used whose fixing means to the ferric covers are simple screws or hooks, which also represents a very slow and hard work.
Explanation.
[0005] Machine to lift and easily transfer sewerage ferric covers, gas network, electricity and telephone network ferric covers using neodymium magnets.
[0006] The machine is a first class lever whose resistance arm supports the gripper head (where the magnets are housed) at its end.
The fulcrum are the wheels and the power arm. This power arm has its end near the handle.
[0007] Inside the gripper head the magnets are mounted.
The machine could lift until 150 kg. The represented model can lift a ferric cover whose weight does not exceed up to 75kg.
This weight refers to ferric covers whose diameter does not exceed 800mm.
In addition to this, the named machine could lift any cover with different shapes, sizes, whenever one of the sides of the gravity center does not exceed 400mm.
[0008] The gripper head is fix, which allows us to use the machine under the water (in the case of floods).
[0009] This invention overcomes the disadvantages already explained in the prior art.
Firstly, it reduces physical effort dramatically (50-60%), and secondly, this machine in others operations reduces coupling thanks to its design.
Form of use.
[0010] The form of use is as it follows:
- Remove the gripper head protective housing. After this, the gripper head is put on the approximate ferric cover centre. Then, the ferric cover can be easily lifted over the wheels displace.
To place the cap in the process is repeated accomodation.
[0011] The whole machine is made up of stainless steel, except the wheels, magnets and the protective casing of the gripper head.
DESCRIPTION OF THE DRAWINGS.
[0012]
Figure 1.
Figure depited shows two tubes welded together at an angle of 120°.
There are three pieces which are welded to these two arms, and they are perpendicular
to them.
One of them is the handle, which is welded near the upper of the tube. This handle
is a round tube which dimensions are: 30x 1.5 mm.
The other two pieces are the wheel support and the gripper head. Both pieces are tubes
whose dimensions are: 40x15x1.5mm.
The wheel support is welded to the power arm. at 450mm from the gripper head.
And the handle is welded at 80mm from the end of the resistance arm.
There are tour internal reinforcements : one is at the junction of the two arms, another
one is at the junction of the handle with the power arm and the remaining two are
on the wheel support.
Figure 2.
It shows the gripper head. The gripper head is formed by an Omega shape metal sheet
which forms four of the six sides of the magnets housing.
This metal sheet is 2mm. One of its ends is clogged by holding the sheet and welding
it. The another end is formed when the metal sheet is bent upwards for riveting a
nut which is fixed by a screw cap. This is a part which conforms the Omega shape.
This edging whose open side is at the bottom, is covered by a 1mm metal sheet which
is riveted and sealed , thanks to this, the magnets housing is closed and sealed.
The protective housing of the gripper head is an aliminium tube whose dimensions are:
120x60mm.
In addition to this, it has an opening for sliding over the said head and to isolate
it.
HOW THIS INVENTION IS MADE.
[0013] The whole machine is made up of stainless steel, excert the wheels, magnets and the protective casing of the gripper head.
[0015] There are three pieces which are welded to these two arms, and they are perpendicular to them.
One of them is the handle, which is welded near the upper of the tube. This handle is a round tube which dimensions are: 30x 1.5 mm.
The other two pieces are the wheel support and the gripper head. Both pieces are tubes whose dimensions are: 40x15x1.5mm.
The wheel support is welded to the power arm. at 450mm from the gripper head.
And the handle is welded at 80mm from the end of the resistance arm.
[0016] There are tour internal reinforcements : one is at the junction of the two arms, another one is at the junction of the handle with the power arm and the remaining two are on the wheel support.
[0017] The gripper head is formed by an Omega shape metal sheet which forms four of the six sides of the magnets housing.
This metal sheet is 2mm. One of its ends is clogged by holding the sheet and welding it.
The another end is formed when the metal sheet is bent upwards for riveting a nut which is fixed by a screw cap. This is a part which conforms the Omega shape.
[0018] This edging whose open side is at the bottom, is covered by a 1mm metal sheet which is riveted and sealed, thanks to this, the magnets housing is closed and sealed.
[0019] The protective housing of the gripper head is an aliminium tube whose dimensions are: 120x60mm.
In addition to this, it has an opening for sliding over the said head and to isolate it.
The machine is a first class lever whose resistance arm supports the gripper head, where the magnets are housed at its end. The fulcrum are the wheels and the power arm. The power arm has its end near the handle.