FR3107263A1 - CONSTRUCTION BUCKET INCLUDING A LIFT BEARING SUPPORTED ON A PROTECTED STOPPER - Google Patents

Abstract

[The present invention relates to a dump body comprising a tank elongated in a longitudinal direction, comprising a bottom (1), an inclined front transverse face for pouring (2), two side faces (4), a rear transverse face ( 6) and a lifting beam (8) formed of an upper gripping tube (10) and two uprights (12) arranged at the ends of said tube, each of these two uprights (12) comprising in the lower part a transverse pivot ( 26) for connection with a side face (4) of the tank and, below this pivot (26), a strap (34) coming into a substantially vertical position of the lifter (8) resting on a stop (28) fixed on the side face (4) of the tank. This bucket is characterized in that each fixed stop (28) is placed behind the strap (34) of the upright (12) and in that each upright (12) has a protective plate (32, 40) which covers at least the strap of said upright (12) and which completely covers the fixed stop (28) in all the positions that the lifter bar (8) can take. Figure for abstract: Figure 10]

Description

CONSTRUCTION BUCKET COMPRISING A ROLLER SUPPORTING ON A PROTECTED STOP

Technical field of the invention

The present invention relates to a portable site dumpster that can be manipulated with the aid of a lifter, provided for the removal or removal of materials such as rubble or waste on a site.

This dumpster is still called a “dumper” by professionals.

Technology background

To transport and dump materials such as rubble or waste on construction sites, in particular on building or public works sites, a known type of tipper, presented in particular by the document FR-A1-3062847 published on August 17, 2018 at the name of the applicant, comprises a tank of elongated shape in a longitudinal direction, which tank has a substantially horizontal flat bottom, two substantially vertical side faces and a rear face, all three of which have outward folds forming rims at their part top, and finally a front face strongly inclined towards the outside so as to form a pouring spout which facilitates the dumping of the materials on the ground.

For the handling of this tipper, there is provided a lifting beam forming an arch, a lifting beam which consists of a transverse tube fixed to the upper end of two uprights, each made of a cut sheet. The base of each upright, which lies flat along a side face of the tank, is fixed by a pivot arranged transversely slightly below the upper edge of this side face.

The transverse tube of the spreader has a lifting ring receiving underneath a rotating cam which has a transverse axis and which allows, during a first descent of the spreader lifted by a crane, to approach a construction consisting of three transverse axes lifting control fixed on the rear face of the tank and hooking onto the upper transverse lifting axis then, during a very slight subsequent descent, to pivot in order to unhook from this lifting axis.

The plate of the base of each upright of the lifter extends, below the pivot, from an angled lower end also called "strap" which, more precisely in a horizontal position of this upright, is angled downwards in relation to the main axis of the upright. In a substantially vertical position of the lifter, this angled strap bears under an upper rim of the side face of the tank in order to produce a stop preventing any forward movement of the lifter, beyond this substantially vertical position.

In this way, when lifting the skip and transporting it by air, the lifting beam remains substantially vertical thanks to the mass of the tank suspended in the lower part, and this skip is thus prevented at all times from tipping backwards and accidentally empty. The same applies forwards, tilting being made more difficult by the abutment of the spreader bar on the tank stop which shifts the point of rotation/tilting of the spreader bar/bucket pivot to the attachment point of the spreader bar, located much higher above the load's center of gravity.

During the next dumping of the skip, the crane operator lowers the lifting beam low enough to hook the control cam on the upper transverse lifting axis placed on the rear face of the tank, which then enables him to lift the rear of the this dumpster to empty it.

The following lowering maneuver of the spreader bar then makes it possible to unhook it from this rear face and again carry the skip, which remains horizontal throughout this movement, whether it is empty or whether it has been loaded again with rubble.

In order to protect the abutment arranged on each side of the lifter, an external protective formwork comprising a folded sheet, fixed to the upper part of each side face of the tank, completely covers the area of movement of the strap of the upright located under the rim. upper side of this side face. In this way, an operator is prevented from putting his hand on the stop during a movement of the lifter, for example by guiding the bucket on the ground, with a risk of pinching certain fingers, or even the hand, during the movements of said lifter .

However, such pinching unfortunately most often leads to the amputation of the injured fingers or hand.

However, with the pivot arranged above the strap of the upright, the latter is necessarily bent in relation to the axis of this upright to allow this end, in the horizontal position of the crossbar, to descend inside the protective formwork, and to remain in this formwork in all positions of the lifter.

In other words, for each side face of the tank, this arrangement therefore requires an angled upright, as well as a pivot arranged outside the protective casing on a tab emerging from the side face of the tank, which is more complex. to be made at higher cost. In addition, this arrangement leaves the lifter positioned above the upper part of the tank when unloading the latter, which makes it very vulnerable during filling operations with a mechanical shovel or any other construction machine, risk of damaging it irreparably.

Presentation of the invention

The object of the present invention is in particular to avoid these drawbacks of the prior art.

To this end, it proposes a site skip comprising an elongated tank in a longitudinal direction, comprising a bottom, an inclined front transverse face for pouring, two side faces, a rear transverse face and a lifting beam formed of an upper tube of handle and two uprights arranged at the ends of said tube, each of these two uprights comprising in the lower part a transverse pivot connecting with a side face of the tank and, below this pivot, a strap coming into a substantially vertical position of the lifter resting on a stopper fixed to the side face of the tank, this bucket being remarkable in that each fixed stopper is arranged behind the strap of the upright and in that each upright is provided with a protective sheet which covers at the minus the strap of said upright and which completely covers the fixed stop in all the positions that the spreader bar can take.

An advantage of this site bucket is that, to make the lifter, you can use a straight upright, formed for example with a simple tube comprising a pivot placed directly on the side face of the bucket below its upper edge, then fix on the side of such an amount a sheet completely covering the fixed stop regardless of the movements of the lifter, which represents a simple and economical construction.

The construction tipper according to the invention may also comprise one or more of the following characteristics, which may be combined with each other.

Advantageously, each upright consists of a tube which is straight.

Thus, each protective sheet can then be fixed on the outermost face of its upright which is parallel to the side face of the tank.

According to a first variant embodiment, the protective sheet is formed by a sheet which is entirely flat.

Preferably, in this first construction, the guard plate has a curved edge which is substantially centered on the axis of the pivot and, still preferably, the opposite side of the curved edge of the guard plate forms a straight edge fitted on the front face of the upright.

According to a second variant embodiment, the protective sheet is formed by a sheet which is partially bent in the direction of the side face of the tank.

Very advantageously, the edge of the protective sheet then consists of straight portions.

According to a preferred embodiment, the protective sheet has the shape of a polygon, and preferably that of a half-pentagon, of which all the sides free of the strap are bent in the direction of the side face of the tank.

In this case, advantageously, the side opposite the folded sides of the protective sheet may form a straight edge fitted to the front face of the upright.

In all the embodiment variants set out above, each upright will advantageously include an extension plate which, welded to one side of the tube in the longitudinal direction of the bucket, receives the pivot.

Preferably, each stop is formed by a short tube attached to the outer part of the side face of the bucket.

Still preferably, each pivot is fixed on a side face of the bucket, below the upper edge of this side face.

In all the aforementioned cases, the skip according to the invention can advantageously comprise a reinforcing plate fixed to the outer part of each lateral face, this reinforcing plate covering the zone of the pivot and of the stop and being provided with stiffening folds.

The invention will be better understood and other characteristics and advantages will appear more clearly on reading the description below given by way of example and in a non-limiting manner, with reference to the appended drawings in which:
is a perspective view of a bucket according to the invention with its lifter lifted;
is the same perspective view with the flat plate protecting the abutment which is hidden;
is a side view of the dump body of Figure 1 with its lifter raised;
is the same side view with the flat abutment protection plate which is hidden;
is a side view of the dump body with its lifter lowered;
is the same side view with the flat abutment protection plate which is hidden;
is a side view of the skip raised for emptying, said skip being equipped with its flat protective plate;
is the same side view with the flat plate protecting the abutment which is hidden;
is a rear three-quarter perspective view of the second alternative embodiment of the bucket according to the invention in which the flat protective sheet is replaced by a sheet folded in the shape of a bell;
is a side view of the dump body of FIG. 9, still with its lifting beam raised;
is a side view of the dump body of Figure 9, with its lifter lowered;
is a side view of the bucket of Figure 9 illustrating the emptying thereof;
is a top view of the bucket of Figure 9, and
is a perspective view of the lower end of one of the two spreader beams showing the interior of the bell-shaped protection in more detail.

Description of preferred embodiments

Figures 2, 4, 6 and 8 show a skip consisting of a lifter and an elongated tank in a longitudinal direction, made with folded and welded metal sheets, comprising a substantially horizontal flat bottom 1, a front face steeply inclined 2, as well as two side faces 4 and a rear face 6 which are in turn three substantially vertical.

This bucket conforms to those objects of the present invention, except that it is shown not provided with the sheet metal or the protective bell intended to eliminate any risk of contact between a stop thus protected and the hand of any user.

The spreader bar 8 comprises an upper tube 10 of square cross section, welded on each side to the upper end of an upright 12 formed by a tube of rectangular cross section having its long side arranged in the longitudinal direction schematized by the median plane 14 (see figure 13).

The upper tube 10 comprises in the central part a lifting ring 16 and a rotary cam 18 which cooperates with an upper transverse lifting axis 20 and two lower transverse control axes 22 fixed to the rear face 6 of the bucket, which axes 20 and 22 allow this cam 18 to be hooked or unhooked on the rear face 6. The rotational movements of the cam 18 are braked so that it cannot rotate freely. The rotation of this cam must in fact only be possible under the action of the lifter, or even by hand, by the user of the bucket, in the event that its diabolo shape would take a bad position relative to one of the axes. transverse 20 and 22 requested when gripping the lifter. For more explanation as to the operation of the rotary cam 18, it is useful to refer to European patent 2,927,160 published on October 7, 2015, in the name of the applicant. It will be noted that, in a known manner, the three pins 20 and 22 are fixedly arranged between two sheets welded perpendicular to the rear face 6 of the tank, in the central part of this rear face, so that the three pins 20 and 22 are placed at the right of the rotary cam 18 secured to the tube 10 of the lifter.

The strap 34 of each upright 12 of the lifter comprises an extension plate 24 welded along its tube by extending it forwards, plate 24 which receives in its middle a transverse pivot 26 fixed directly on the side face 4 of the bucket, below its upper rim. The strap 34 is the part of the upright which extends it beyond its pivot 26.

On each side face 4 of the tank, there is also provided a stop 28 formed for example by a short tube of square section arranged along a transverse axis, said stop being in accordance with the invention welded to the tank behind the strap 34 of amount 12.

A reinforcing sheet 30 doubling on the outside the sheet forming the side face 4 of the bucket, at the level of the pivot 26 and the stop 28, ends forwards and backwards in a vertical fold, a fold which ensures a significant reinforcement of this part of the side face 4 subjected to high stresses transmitted by the pivot 26 and the stop 28.

Each stop 28 is arranged lower than the pivot 26, and this in order to obtain, in a substantially vertical position of the crossbar 8, direct support of the rear face of the straps 34 of its uprights 12 on the front side of the two stops 28, in consequently preventing any forward tilting movement of this lifter.

The two pivots 26 being advantageously arranged in front of the median transverse plane of the bucket, the center of gravity of the loaded bucket is now moved; this construction has the effect of keeping the lifted bucket always horizontal, the straps 34 of the lifting beam 8 being in abutment on the lateral stops 28. In this way, a crane operator having engaged the hook of a crane in the lifting ring 16 can lift and move the loaded bucket which is now blocked backwards, and which therefore does not risk tipping forwards.

In a first embodiment of the invention shown in Figures 1, 3, 5 and 7, a protective part 32, formed by a simple unbent sheet metal, is welded to the outermost face of each upright 12 which is parallel to the side face 4 of the tank. This sheet 32 completely covers the strap 34 of said post, or even the area of this post located just above the pivot 26, and advantageously it has a substantially semicircular shape which is centered on the pivot 26, which comprises a straight edge adjusted on the front face of this upright 12, its opposite edge 38 thus forming an arc of a circle so as to permanently cover the stop 28 throughout the rotational movement of the spreader bar 8 when the latter passes from the horizontal position to the position vertical, and vice versa.

Figures 5 and 6 illustrate the dump body according to the invention after the crane operator has lowered the lifting beam 8, the strap 34 of each of the uprights 12 then moving forwards from their stop 28.

In the lowest position of the lifter 8, the rotary cam 18 engages on the upper lifting axis 20 (hidden by the upright 12 in Figures 5 and 6 in question) of the rear face 6 of the bucket.

Figures 7 and 8 show the bucket on the ground according to the invention after the crane operator has lifted the lifting ring 16; the rotary cam 18 being still engaged on the axis 20, the lifting beam 8 blocked on the rear of the bucket then drives this bucket in the same lifting movement so that its contents can be dumped by its front face 2.

Once the skip has been emptied, the crane operator can then lower the lifter 8 again to bring the skip back to rest on the ground on its flat bottom 1, then lower the lifter 8 slightly again and thus disengage the rotary cam 18 from its axis 20 in order to allow a new upward pivoting movement of the lifter which at this time no longer lifts the rear side of the bucket.

In a second variant embodiment of the invention shown in Figures 9 to 14, the tank and the lifter 8 of the skip remain unchanged, as do the fixed stops 28 and the pivoting means of the lifter relative to the side faces 4 of the tank, and only the two abutment protection plates are advantageously modified.

Indeed, the flat sheets 32, in the shape of a semicircle, are replaced by bent sheets 40 of polygonal shape, the edge 42 of which opposite the straight edge fitted on the front face of an upright 12 consists of straight portions .

The sheet 40, at the location of each of these straight portions, is partially bent in the direction of the side face 4 of the tank, so as to form as many projections 44 facing said face 4 as there are portions of rights.

The projections 44 are advantageously contiguous, or even welded together, and the height of said projections is such that they leave only a small space between their edges 46 and the side face 4 of the tank.

Each folded sheet 40 thus forms a sort of bell which covers the fixed abutment 28 and at least the strap 34 of each upright 12 of the crossbar, and which consequently provides the desired protection even better.

In a construction of the folded sheet 40 as close as possible to a semicircle, the edge 42 of said sheet will be formed of five straight portions; finally, the protective bell 40 will thus have the shape of a half-pentagon of which all the sides free of the strap 34 of the upright 12 will be bent in the direction of the side face 4 of the tank.

In all the rotational movements of the lifter 8, it should be noted that the stop 28 remains covered by the protective sheet 32, 40 to ensure effective protection avoiding accidents which occur on any construction site, and in particular the jamming of fingers or fingers. users' hands, jamming which most often leads to amputations.

More incidentally, the protective plates 32, 40 make it possible to reduce the consequences of shocks caused by forklifts, diggers, backhoe loaders, shocks which over time deform the straps 34 of the uprights of the spreader bar 8 as well as their pivots 26, then subsequently making it more difficult, if not impossible, the pivoting movements of the lifter about its axis. It will be noted that the uprights 12, each formed by a simple non-bent rectangular section tube, receiving a protective sheet 32 which is flat, or 40 which is bent, are simple and economical to manufacture. In addition, each pivot 26 being fixed directly to the sheet metal forming the side face 4 of the bucket, without requiring a bracket to offset it relative to this face 4, is itself also simple and economical to produce.
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Claims (14)

Site skip comprising a tank elongated in a longitudinal direction, comprising a bottom (1), an inclined front transverse face for pouring (2), two side faces (4), a rear transverse face (6) and a lifting beam ( 8) formed of an upper gripping tube (10) and two uprights (12) arranged at the ends of said tube, each of these two uprights (12) comprising in the lower part a transverse pivot (26) connecting with a side face (4) of the tank and, below this pivot (26), a strap (34) coming into a substantially vertical position of the lifter (8) resting on a stop (28) fixed on the side face (4) of the tank, characterized in that each fixed stop (28) is placed behind the strap (34) of the upright (12) and in that each upright (12) is provided with a protective plate (32, 40) which covers at least the strap of said upright (12) and which completely covers the fixed stop (28) in all the positions that the lifting beam (8) can take. Bucket according to Claim 1, characterized in that each upright (12) consists of a tube which is straight. Bucket according to Claim 2, characterized in that each protective plate (32, 40) is fixed to the outermost face of its upright (12) which is parallel to the side face (4) of the tank. Bucket according to any one of Claims 1 to 3, characterized in that the protective plate (32) is formed by a plate which is entirely flat. Bucket according to any one of Claims 1 to 4, characterized in that the protective plate (32) has a curved edge (38) which is substantially centered on the axis of the pivot (26). Bucket according to Claim 5, characterized in that the opposite side of the curved edge of the protective plate (32) forms a straight edge fitted to the front face of the upright (12). Tipper according to any one of Claims 1 to 3, characterized in that the protective plate (40) is formed by a plate which is partially bent in the direction of the side face (4) of the tank. Bucket according to Claim 7, characterized in that the edge (42) of the protective plate (40) consists of straight portions. Bucket according to Claim 8, characterized in that the protective plate (40) has the shape of a polygon, and preferably that of a half-pentagon, of which all the sides released from the strap (34) are folded in direction of the side face (4) of the tank. Bucket according to Claim 9, characterized in that the side opposite the folded sides (44) of the protective plate (40) forms a straight edge fitted to the front face of the post (12). Bucket according to any one of Claims 2 to 10, characterized in that each upright (12) comprises an extension plate (24) which, welded to one face of the tube in the longitudinal direction of the bucket, receives the pivot ( 26). Tipper according to any one of Claims 1 to 11, characterized in that each stop (28) is formed by a short tube fixed on the outside of the side face (4) of the skip. Bucket according to any one of Claims 1 to 12, characterized in that each pivot (26) is fixed to a side face (4) of the bucket, below the upper edge (36) of this side face (4) . Tipper according to any one of Claims 1 to 13, characterized in that it comprises a reinforcing plate (30) fixed to the outer part of each lateral face (4), this reinforcing plate (30) covering the area of the pivot (26) and abutment (28) and being provided with stiffening folds.