EP0190275A1

EP0190275A1 - Improvement to a device for reducing the effort of lifting soil with a spade or the like

Info

Publication number: EP0190275A1
Application number: EP85904005A
Authority: EP
Inventors: Luc Claude Jousse
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-08-16
Filing date: 1985-08-16
Publication date: 1986-08-13
Also published as: WO1986001071A1

Abstract

Perfectionnement d'un dispositif pour réduire l'effort de soulèvement de la terre avec une bêche ou analogue; le dispositif perfectionné composé d'un bras (3) articulé à une extrémité sur un collier (16) dans lequel tourne le manche de l'outil, (1) et ayant à son autre extrémité une poignée (2) saisie par la main avant; de sorte que le soulèvement de la bêche chargée de terre peut être effectué seulement avec une flexion des jambes, sans flexion du tronc. Les perfectionnements consistent: 1) En un dispositif élastique (5) appliquant le bras (3) sur le haut du manche de l'outil (1) lorsque la poignée (2) du bras est lâchée. 2) En un dispositif télescopique du bras (3) permettant d'en régler la longueur en fonction de la taille de la personne. 3) En un dispositif élastique (18, 21) effectuant le rappel du bras à l'avant de l'outil, position initiale, lorsque la poignée du bras est lâchée, et que la bêche a été retournée de quelque côté que ce soit.Improvement of a device for reducing the lifting effort of the earth with a spade or the like; the improved device composed of an arm (3) articulated at one end on a collar (16) in which the handle of the tool turns, (1) and having at its other end a handle (2) grasped by the front hand ; so that the lifting of the spade loaded with soil can be carried out only with a bending of the legs, without bending of the trunk. The improvements consist of: 1) An elastic device (5) applying the arm (3) to the top of the handle of the tool (1) when the handle (2) of the arm is released. 2) By a telescopic device of the arm (3) allowing to adjust the length according to the size of the person. 3) In an elastic device (18, 21) effecting the return of the arm to the front of the tool, initial position, when the handle of the arm is released, and the spade has been turned over to any side.

Description

DESCRIPTION

Perfect operation of a device to reduce the lifting effort of the earth with a spade or the like.

The present invention relates to improvements of a device for reducing the lifting effort of the earth with a spade or the like.

The device if per-fected is that which consists of an arm (board 1/3, figures 1 and 2, 3), one end of which is articulated on a first collar (board 2/3, figure 3, 10) rotating freely, but without sliding, on a second collar (11) secured to the handle (1) of the tool. The articulation allows the arm (3) to radiate in any plane of the axis which is common to the collars (10 and 11) and to the handle (1) of the tool, or substantially. The arm (3) has, at its other end, a handle (2) which is integral therewith, to be grasped by the front hand. The back hand grabbing the handle in the usual way.

Improvements include:

1. In an elastic device applying the arm (3) to the handle (1) of the tool when the handle (2) is released. This elastic device is composed of a torsion spring with two windings (plate 1/3, FIGS. 2, 4 and 5) around the axis (9) of articulation of the arm (3) on the collar (10), on either side of the joint itself. This spring is already under tension when the arm (3) is applied to the handle (1).

2. In a telescopic device of the articulated arm, to adapt the length to the size of the person.

First solution: a sheath with a simple internal thread, receiving a single threaded rod; or having two reverse threads, receiving two threaded rods, so that the elongation or shortening ssemnt is obtained by both ends at the same time, in the manner of a tensioner 5 with locking nuts to the appropriate length.

Second solution: a bent rod with Tequerre at one end, this threaded end 5 and a flat iron with holes in its length. The assembly is carried out by the passage of the rod in the flat iron, at one end thereof, this end bent for this purpose, on the one hand; and by a nut tightening on the flat iron the bent and threaded end of the rod through one of the holes of the first flat, on the other hand.

3. In that the axis (plate 1/3, Figures 1 and 2, 9) of the articulation of the arm (3) and the collar (10) together, is:

Exterior, which may be tangential, to the collar (10),

And in a plane perpendicular to the axis of the collar (10).

And in that, when the tool is lifted with its earth load:

In a first way, the plane which is parallel to the axis of the collar (10), of the axis of the articulation (9) is above the tool, and that it remains there, of course, when turning over the tool for overturning the earth.

In a second way, the plane which is parallel to the axis of the collar (10), of the axis of the articulation (9) is below the tool, and that it remains there, of course, when turning over the tool for overturning the earth.

And still in that, in the latter case, the arm (3) divides into two branches to straddle the collars (10 and 11) and the handle (1) up to the articulation around the axis (9) .

4. In that the articulation of the arm (3) and the collar (10) together is at two points located on the outer perimeter of the collar (10), In the same plane perpendicular to the axis of the collar (10),

Equidistant from the axis of the collar (10),

Around the same ideal axis forming the chord of the arc which is a part of the circumference of the collar (10), this ideal axis can be located following the tangent, up to the diameter included.

So that when the tool is lifted with its earth load:

In a first way, the axis of the collar (10) is below the plane which is parallel to it and which is common to the two points of the articulation of the arm (3) and the collar (read) together;

In a second way, the axis of the collar (10) is in a plane which is common to the two points of the articulation of the arm (3) and the collar

(10) together;

And in a third way, the axis of the collar (10) is above the plane which is parallel to it and which is common to the two points of the articulation of the arm (3) and of the collar (10) together.

In these three cases, the arm (3) divides into two branches to straddle the collars (10 and 11) and the handle (1) up to the two points of the joint.

5. Use one or two springs to obtain the automatic return, at the front of the tool, to its initial position, of the articulated arm (3). First solution

1. A first simple torsion spring (board 3/3, Figure 4, 12), this spring working only in the direction of reduction of the diameter of the turns, is placed to act at one of the ends of the set of two necklaces (10 and 11).

One of the ends (13) of this spring is integral with the collar (10) carrying the arm. The other end (14) is integral with the other collar

(11) at the shoulder thereof; this other collar (11) integral with the handle (1) of the tool. This spring is tensionless when the arm is in its initial position, at the front of the tool.

It is stretched by turning the spade in one direction only: to the right according to the representation made of it from the front.

2. A second simple torsion spring (15) identical to the first, is placed to act at the other end of the assembly of the two collars.

Its turns are in the same direction as those of the first.

It is also tensionless when the arm is in its initial position, in front of the tool.

It is tensioned only in the direction of turning the spade on the side opposite to that causing the tension of the first spring, that is to say on the left according to the representation which is made of it from the front.

3. When the spade is turned over in one direction, the non-working spring is separated, by one of its ends, from one of the two collars, this end emerging from a stop secured to the collar and which causes the tension in the other direction.

The two springs can form only one, which is integral in its middle, with the collar (10) carrying the arm, and each of the two ends of which is integral with one of the shoulders (11) of the collar itself integral with the handle (1) of the tool, by a stop. The stop of one of the two ends of the spring causing the tension while the other of the two ends of the spring emerges from its own. Second solution

1. A single torsion spring, similar to one of the two springs above, but working in both directions, ie both in the direction of reducing the diameter of the turns and in the direction of increasing this diameter;

Solid, at one of its two ends, the collar (10) carrying the articulated arm (3), and, at the other of its two ends, the collar (11) integral with the handle (1).

It is tensionless when the arm (3) is in its initial position, in front of the tool.

So that this single spring automatically recalls, at the front of the tool, the arm (3) with the support collar (10), regardless of which side the spade is turned over.

2. The action of this torsion spring can be reinforced by that of a second identical spring placed at the other end of the set of two collars (10 and 11) and whose turns are in the same direction as those from the first, or in reverse.

3. To ensure exactly, in one or other of the solutions, the absence of tension of each of the two springs, or of the single spring, when the arm (3) is at the front of the tool, in its position initial, the anchoring of each of the two springs, or of the single spring, on the perimeter of one of the collars, is adjustable, for example by sliding the end of the spring in an eye secured to the collar and in which the spring is locked by a screw when the arm is in its initial position, at the front of Tout il.

Claims

CLAIMS Improvements to the existing device and intended to reduce the lifting effort of the earth with a spade or the like.

1. The existing device, improved, is that which consists of an arm (board 1/3, figures 1 and 2, 3), one end of which is articulated on a first collar (board 2/3, figure 3, 10) rotating freely, but without sliding, on a second collar (11) secured to the handle (1) of Toutil. The articulation allows the arm (3) to radiate in any tax plan which is common to the collars (10 and 11) and to the handle (1) of Toutil, or substantially. The arm (3) has, at its other end, a handle (2) which is integral therewith, to be grasped by the front hand; the rear hand grasping the handle (1) of Toutil in the usual way. e

2. Improvement to the existing device consisting of an elastic device composed of a torsion spring with two windings (plate 1/3, FIGS. 2, 4 and 5) around Tax (9) of the articulation of the arm (3) and of the collar (plate 2/3, Figure 3, 10) together, these windings being on either side of the articulation proper. This spring is already in tension when the arm (3) is applied to the top of the handle (1) of Toutil, so that the tension increases as the angle formed by the arm (3) opens. ) and the top of the handle (1) of the tool.

3. Improvement to the existing device, consisting of a telescopic device of the arm (3) comprising a sheath having a single internal thread, receiving a single threaded rod; or having two reverse threads, receiving two threaded rods, in the manner of a tensioner; with locking nuts.

4. Improvement to the existing device, consisting of a telescopic arm device (3) comprising a bent rod at the square, at one end, this threaded end; and a flat iron with holes in its length, The rod slides in the flat iron at one end thereof, this end bent for this purpose; the threaded end of the rod being on the side of the flat iron, and being able to be tightened on the flat iron through any one of the holes thereof, by means of a nut.

5. Improvement to the existing device consisting in that the articulation of the arm (3) and the collar (10) together is around an axis which is:

Outside the collar (10); can be tangent to it. And in a plane perpendicular to Tax of the collar (10).

6. Improvement to the device according to claim 5, characterized in that, when Toutil is lifted with its earth load, the plane which is parallel to Collar tax (10), Tax (9) of the joint, is at below Toutil.

7. Improvement to the device according to claims 5, and 6, characterized in that the arm (3) is divided into two branches to straddle the collars (10 and 11) and the handle (1) of the tool up to l 'articulation of the two branches around Tax (9).

8. Improvement to the existing device, characterized in that the articulation of the arm (3) and the collar (10) together, is at two points located on the outer perimeter of the collar (10),

In the same plane perpendicular to Tax of the collar (10),

Equidistant from the Collar Tax (10),

The ideal axis common to the two points of the articulation forms the Tare cord which is part of the circumference of the collar (10); this ideal axis can be between the tangent and the diameter, and merge with the diameter.

9. Improvement to the device according to claim 8, characterized in that, when Toutil is lifted with its earth load, Tax of the collar (10) is below the plane which is parallel to it, of the two points of the articulation of the arm (3) and of the collar (10) together.

10. Improvement to the device according to claim 8, characterized in that, when Toutil is lifted with its earth load, Tax of the collar (10), on the one hand, and the two points of the articulation of the arm (3) and the collar (10) together, on the other hand, have a common plane.

11. Improvement to the device according to claim 8, characterized in that, when Toutil is lifted with its earth load, Tax of the collar (10) is above the plane which is parallel to it and which is common to the two points of the articulation of the arm (3) and the collar (10) together.

12. Improvement to the device according to claims 8, 9, 10, and 11, characterized in that the arm (3) is divided into two symmetrical branches, straddling the collars (10 and 11) and the handle (1) of Toutil, to the two points of the articulation of the arm (3) and the collar (10) together.

13. Improvement to the existing device, characterized in that the two collars (10 and 11) are connected by two identical torsion springs (plate 3/3, FIG. 4, 12 and 15), working one and the other in the direction of reduction of the diameter of the turns.

One of these springs (12) is placed at the end closest to Toutil's iron, of the set of two collars (10 and 11).

It is secured, at one of its ends (13), to the collar (10) carrying the arm (3), and at its other end (14), to the collar secured to the handle (1) of Toutil, by one of the shoulders of the latter collar (11).

One of its ends is secured to one of the two collars only in the direction of the spring tension, by a stop which it releases in the other direction.

This spring is exactly off when the arm (3) is in its initial position, in front of Toutil.

The other spring (15) is placed at the other end of the assembly of the two collars (10 and 11).

It is subject to the same features as the previous one, but in reverse,

Its turns are in the same direction as those of the previous one.

The two springs can form only one, which is integral, in its middle, with the collar (10) carrying the arm (3), and whose two ends are respectively integral with the two shoulders (11) of the integral collar of the handle (1) of Toutil, by a stop in the direction of your tension, stop from which they emerge in the other direction.

14. Improvement to the existing device, characterized in that the two collars (10 and 11) are linked by a single torsion spring working in both directions, that is to say both in the direction of reducing the diameter of the turns and in the direction of increasing this diameter.

This spring is secured at one of its ends (14 or lό) to the collar secured to the handle (1) of Toutil, by one of the shoulders (11) of this collar; and, at the other end (13 or 17), of the collar (10) carrying the arm (3).

15. Improvement to the existing device, and to claim 14, characterized in that a second spring identical to that of claim 14 is placed at the other end of the assembly of the two collars (10 and 11); this second spring having its turns in the same direction as the first, or in the opposite direction.

16. Improvement to claims 13, 14, and 15, characterized in that the anchoring of each of the two springs (12 and 15), or of the single spring, on the perimeter of one of the two collars (10 and 11), is adjustable, for example by sliding one end of the springs, or both ends of the single spring, in an eye secured to the collar and in which the spring is locked by a clamping screw.