ITMI20081365A1 - WHEEL CART CHANGED IN ORDER TO AVOID AN EXCESSIVE EFFORT IN THE UNLOADING OF THE SAME - Google Patents

Description

DESCRIPTION OF INDUSTRIAL INVENTION

The wheelbarrow is a tool for transporting various materials, mainly used in construction, it is composed of a container (tub), a wheel, a frame and two handles (poles). To unload the material, it is normally necessary to leverage the wheel (not locked) and with the strength of the arms and body, lift it until it is completely unloaded. The effort that is made increases in relation to the weight carried.

The patent object involves additional modifications to the traditional wheelbarrow with the aim of avoiding excessive physical effort when unloading the transported material.

The main modification can be described as the addition of a support strut and other mechanical parts, which act as a lever and by means of joints on the frame, to make sure that the weight of the load helps the unloading with the sole condition of keeping the wheelbarrow in balance by means of the handles, (see table 1)

The invention covered by the patent is made up of three groups: (see table 1)

â € ¢ A front bearing structure (1) to which the following must be fixed: the wheel unit (2), the telescopic support strut (3) with mechanical devices for movement and three mechanical pedals: a first pedal (4) for lowering of the strut (3), a second pedal consisting of two moving parts (5) and (5a) with the function of unlocking the rear structure (7) to start unloading and a third pedal (6) to unlock the strut ( 3) and allow it to return to the initial position.

â € ¢ A rear structure (7) that ends in the handles and the two "V" -shaped supports on the ground are welded to it. This structure must be joined to the front structure (1) by means of mobile joints (8) with calibrated threaded bolts.

â € ¢ A tank (9) with four movable joint points, joined by means of calibrated thread bolts: two joints (10) to connect the bowl (9) to the rear structure (7) and two other joints (11) to join the tank (9) to supports (12) which in turn are joined to the front structure (1) by means of mobile joints (13) also with bolts.

UNLOADING PROCEDURE:

Premise: during the whole material unloading procedure, the wheelbarrow is held by the handles with both hands like a common wheelbarrow. Keep in mind that every time the foot is used to operate a pedal, either to lock or unlock each device, it is released immediately.

As in table 2, to proceed with the unloading of the material, keeping the wheelbarrow raised by the handles, a first pedal (4) is operated with the foot downwards (see boxes â € œAâ €) which allows the telescopic strut to descend ( 3) which guided by the piece (3a) (see box â € œBâ €) automatically locks at the end of the stroke with the return of the pin (14) (see boxes â € œCâ €). Then the wheelbarrow is released keeping it in balance (at this point all the weight is supported by two support points: the wheel (2) and the strut (3). Table 3 illustrates (see boxes â € œAâ €) how to operate a second ambidextrous pedal (5) leverages the anchoring point (15) of the support strut (3), and moves the piece (5a) (see box â € œBâ €) which in turn leverages the anchoring point (16) of the front structure (1), releases the rear structure (7) (see boxes â € œC ") Simultaneously with the procedure described above, it is necessary to operate the pedal (5) with a slight movement of the rear structure ( 7) to make it come out of the locking seat. Subsequently, with a slight push upwards through the handles, the material is unloaded. This action will allow the weight of the same load to move the tank (9) up and down. forward allowing the self-discharge. The user will therefore have to hold back and handles to control the drain.

Table 5 illustrates the sequence of what was previously described: from the initial position (see box â € œAâ €) loaded wheelbarrow resting on the wheel (2) and the two V-shaped supports of the rear structure (7), then ( see box â € œBâ €) the wheelbarrow resting on the ground on the wheel (2) and the support strut (3) already lowered, is held in balance by the handles of the rear structure (7), passes through an intermediate unloading position (see box â € œCâ €) in which the rear structure (7) and the tank (9) are already raised. The box â € œDâ € illustrates the position of total material discharge. After having finished unloading the material, the rear structure (7) is lowered and once the initial position has been reached, it hooks up automatically This action, illustrated in table 4, is possible thanks to the shaped shape of the piece hooking strap (5a) which favors guided re-entry; yes see how in the instant in which and the stop of the rear structure (7) touches the strap (see box â € œAâ €), this not only acts as a guide but begins to be moved backwards (see boxes â € œBâ € and â € œCâ €) for the weight of the same posterior structure (7) until reaching the crest of the curvature anterior to the seat (see box â € œDâ €). During the stroke of the rear structure (7) the strap (5a) begins to go back (see box â € œEâ €) until the stop re-enters its seat, definitively locking the rear structure (7) (see box â € œFâ €) . To raise the telescopic support strut (3) to the initial position as shown in table 2 (see boxes â € œDâ €), it is necessary to release the strut by means of a third pedal (6) operated with the foot. The latter pulls back the pin (14) (see boxes "Eâ €) allowing the support strut (3) to go up guided by the piece (3a), and return to the initial position (see box â € œFâ €).

Claims (3)

CLAIMS Modified wheelbarrow comprising: (see table 1) 1. A front bearing structure (1) to which the following must be fixed: the wheel unit (2), the telescopic support strut (3) with mechanical devices for movement and three mechanical pedals: a first pedal (4) for descent of the strut (3), a second pedal consisting of two moving parts (5) and (5a) with the function of unlocking the rear structure (7) to start unloading and a third pedal (6) to unlock the strut (3 ) and allow it to return to its initial position. 2. A rear structure (7) that ends in the handles and the two "V" shaped supports on the ground are welded to it. This structure must be joined to the front structure (1) by means of mobile joints (8) with calibrated threaded bolts. 3. A tank (9) with four movable joint points, joined by means of calibrated thread bolts: two joints (10) to join the tank (9) to the rear structure (7) and two other joints (11) to join the tank (9) with supports (12) which in turn are joined to the front structure (1) by means of mobile joints (13) also with bolts,