FR3088167A1 - SCRAPER FOR ANIMAL HUSBANDRY PLANT AND BREEDING PLANT PROVIDED WITH SUCH A SCRAPER - Google Patents

Abstract

Scraper (1) comprising a frame (2) for supporting the scraper blades (3A, 3B) and a mechanism (4) for driving the reciprocating movement of said frame (2), each blade (3A, 3B) being mounted on the movable frame (2) pivoting about a pivot axis (XX ') extending orthogonally to the direction of movement back and forth of the frame (2) for the passage of said blade ( 3A; 3B) from an active scraping position in which an edge (9) of the blade attack edge (3A; 3B) is brought closer to the ground in an inactive retracted position, the control mechanism (4) being configured to forming, during each back and forth movement of the frame (2), a drive member for moving the blades (3A; 3B) for the passage of the blades (3A; 3B) from one position to another. The blades (3A; 3B) are alternately in the active position and occupy one, an active position during the forward movement of the frame (2), the other, an active position during the return movement of the frame (2).

Description

Description

Title: Scraper for animal breeding facility and breeding facility equipped with such a scraper

The invention relates to a scraper for scraping the bottom of a pit, such as a droppings recovery pit for an animal breeding installation as well as an animal breeding installation equipped with such a scraper.

It relates in particular to a scraper comprising a support frame for scraper blades and means for driving the displacement of the frame comprising a mechanism for controlling the drive in reciprocating movement of said frame in a direction of movement, each blade scraper being mounted on the movable frame pivoting about a pivot axis extending orthogonally to the direction of reciprocating movement of the frame to allow, in the positioned state of the frame on the ground with the axis pivot extending horizontally, the passage of said blade from an active scraping position in which one of the so-called leading edges of the blade is close to the ground and is capable of coming into bearing contact with the ground at a retracted inactive position in which said leading edge of the blade is removed from the ground, the control mechanism being configured to form, during each back and forth movement of the frame, a drive member for moving the blades for passage lam from one position to another.

Such a scraper is known as illustrated by patent FR 2 939 007. In fact, in a number of animal productions (ducks, veal calves, cattle, pigs, rabbits ...) scraping systems are used for animal excrement. . These are thus recovered in the form of slurry.

The interest goes towards the welfare of the animal and the breeder. The frequent scraping of the droppings makes it possible to prevent them from fermenting under the gratings (or cages) where the animals are present. The atmosphere in the breeding room is then healthy. There is much less gas like ammonia and or nitrous oxide or other. The animal, living in better respiratory conditions, expresses its genetic potential at best, which allows better economic results.

But frequent scraping also poses a recurring problem of equipment wear and consequent energy consumption. Indeed, the maintenance of such a scraper requires frequent interventions due to significant wear of the scraper. We are therefore looking for solutions to reduce the wear of the scraper to allow a reduction in maintenance operations.

An object of the invention is to provide a scraper, the design of which makes maintenance easier and limits energy consumption.

To this end, the subject of the invention is a scraper intended for scraping the bottom of a pit, such as a droppings recovery pit for animal breeding installation, said scraper comprising a support frame for scraping blades. and means for driving the movement of the frame comprising a mechanism for controlling the movement of the frame back and forth in said direction in a direction of movement, each scraper blade being mounted on the movable frame pivotally about a pivot axis extending orthogonally to the direction of reciprocating movement of the frame to allow, in the positioned state of the frame on the ground with the pivot axis extending horizontally, the passage of said blade of a active scraping position in which a so-called blade leading edge is brought closer to the ground and is capable of coming into bearing contact with the ground in a retracted inactive position in which said blade leading edge is moved away from the ground, the control mechanism being configured figured to form, during each back and forth movement of the frame, a drive member for moving the blades for the passage of the blades from one position to another, characterized in that the blades are alternately in the active position and occupy l one, an active position during the forward movement of the frame, the other, an active position during the back movement of the frame.

As the blades are alternately in the active position, i.e. configured so that when one of the blades is in the active position, the other is in the inactive position and one of the blades is configured to occupy a active position during the forward movement of the frame, and the other blade is configured to occupy an active position during the backward movement of the frame, it is possible in one go or return movement to scrape the bottom of the pit. This results in a reduction of half of the energy consumption compared to the scrapers of the state of the art where a back and forth movement of the blades is necessary for scraping and less wear of the blades and the material as a whole. due to a reduction in movements with identical scraping efficiency.

According to one embodiment of the invention, the mechanism for driving the reciprocating movement of the frame comprises a draw bar equipped with a control, preferably cable, for driving the reciprocating movement back and forth of said draw bar, said pull bar being mounted on the movable sliding frame in a direction parallel to the direction of movement back and forth of the frame between a first and a second position and being configured for move from one position to another after each reversal of the direction of control of the drive control back and forth movement of said drawbar, this drawbar being equipped with at least two stops forming the one or one, a retaining stop for one of the blades in the inactive position in the first position of the drawbar, the other or the other, a retaining stop for the other blades in the inactive position in the second position of the flybar ion.

The passage of the blades from an active position to an inactive position or vice versa by simple contact contact with the stops of the drawbar allows an extremely simple design of the scraper with a reduced risk of failure.

According to one embodiment of the invention, the leading edge of each blade is spaced from the pivot axis of the blade by a distance greater than the distance separating the pivot axis from the edge of the blade opposite the edge d 'attack. Thus, each blade tends under the effect of its own weight to be returned to the active position of support on the ground from the leading edge of the blade.

According to one embodiment of the invention, the blade support frame comprises two facing parallel cheeks connected to each other by a connecting structure comprising two substantially parallel rotary bars extending orthogonally to the direction of reciprocating movement of the frame and each forming a support bar for a blade for pivotally mounting said blade.

According to one embodiment of the invention, the drawbar is, for its sliding mounting on the frame, provided with two oblong openings offset axially along the drawbar and with a longitudinal axis parallel to the direction of movement back and forth from the frame, each light being traversed by a support bar for a blade of the frame. The support bars thus serve as a guide for the sliding movement of the drawbar. These support bars are in the end-of-travel position of the pull-up bar, each placed at one end of the oblong slots.

According to one embodiment of the invention, the stops of the drawbar are, in the positioned state of the frame on the ground with the pivot axis disposed horizontally, arranged at least partially above the plane passing through the bars support of a blade and each blade has a so-called upper part, corresponding to the part of the blade disposed between its edge opposite its leading edge and the pivot axis, disposed, in the active position of the blade, on the path able to be followed by one of the stops during a sliding movement of the drawbar to allow said stopper to act as a pusher on the upper part of the blade when passing the drawbar d 'one position to another.

According to one embodiment of the invention, at least one of the stops of the pull-up bar takes the form of a curved tongue arranged along one of the longitudinal said upper edges of one of the oblong openings of the drawbar.

According to one embodiment of the invention, the scraper comprises, for each blade, at least one member for limiting the angular displacement of said blade in the direction of activation of the blade corresponding to the pivoting movement of the blade of the inactive position to the active position, said limiting member, mounted on the frame and / or on the drawbar, being disposed on the path followed by said blade for its passage from the inactive position to the active position to prevent angular displacement of said blade (3A, 3B) beyond a predetermined angular position.

The subject of the invention is also a breeding installation comprising a breeding zone situated above a droppings collection pit, said installation comprising at least one scraper capable of scraping the bottom of the pit, characterized in that that the scraper conforms to that described above and in that the reciprocating movement drive control mechanism of said frame is configured to drive the frame in displacement in a direction of movement, parallel to an axis longitudinal of the pit in the positioned state of the frame on the bottom of the pit.

According to one embodiment of the invention, the pit with a longitudinal axis corresponding to the direction of back-and-forth movement of the scraper is provided, at each of its ends, with a transverse pipe for evacuating manure.

The invention will be clearly understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:

[Fig. 1] shows a partial schematic perspective view of a breeding facility according to the invention;

[Fig. 2] shows a top view of a breeding installation according to the invention;

[Fig. 3] shows a perspective view of a scraper according to the invention;

[Fig. 4] shows a partial perspective view of the frame and the associated pull-up bar;

[Fig. 5] shows a bottom view of a scraper according to the invention;

[Fig. 6] shows a side view of a scraper in the active position of the blade shown in 3B in said figure; and [Fig. 7] shows a side view of a scraper in the active position of the blade shown in 3A in said figure.

As mentioned above, the subject of the invention is a scraper 1 intended for scraping the bottom 22 of a pit 21 for recovering droppings equipping the soil with a breeding facility 20 and generally extending longitudinally to the interior of a building as shown in Figure 1.

This pit 21, the depth of which generally varies from 0.2 m to 1 m, is surmounted by cage (s) or a perforated floor for receiving animals. Generally, each pit is bordered, along each of its longitudinal edges, with one or more working lanes which allow an operator to circulate along the pit. A livestock building can thus have several parallel rows formed each time of a cage or floor / pit assembly, said rows being separated from each other by a working corridor. As a variant, the building may not be equipped with such corridors, in particular when the floor is formed by gratings, for example in the case of pig breeding. The bottom of the cages or the floor is a perforated or screened surface through which the droppings automatically fall to the bottom of the pit. The bottom 22 of the pit is, for its part, traversed by a scraper 1 animated back and forth along an axis parallel to the longitudinal axis of the pit so as to allow the evacuation of the droppings outside of the building. Each end of each row is fitted for this purpose with a transverse waste discharge pipe 23. The frequency of passage of the scraper 1 depends on the type of breeding.

This scraper 1 comprises a frame 2 supporting two scraper blades 3A, 3B and means for driving in movement of the frame 2 comprising a mechanism 4 for controlling the drive in reciprocating movement of the frame 2 configured to drive in displacement, the frame 2 in a direction of displacement known as axial parallel to a longitudinal axis of the pit in the positioned state of the frame 2 on the bottom 22 of the pit 21.

Each scraper blade 3A or 3B is mounted on the movable frame 2 pivoting about an axis XX 'pivot extending orthogonally to the direction of movement back and forth of the frame 2 to allow, in the positioned state of the frame 2 on the ground with the axis XX ′ pivot extending horizontally, the passage of said blade 3A, 3B from an active scraping position in which a leading edge 9 of the blade of complementary shape to the gravity profile the bottom of the pit is close to the ground and is able to come into bearing contact with the ground in a retracted inactive position in which the leading edge 9 of the blade 3A or 3B is moved away from the ground.

This leading edge 9 of each blade 3A or 3B is preferably V or W.

In the examples shown, the frame 2 comprises two cheeks 13 between which the blades 3A and 3B scraping extend transversely. The cheeks 13 are intended to be housed along the side walls of the installation pit serving as a guide to allow sliding movement of the scraper 1 along the longitudinal axis of the pit. The scraping blades 3A and 3B are thus positioned transversely to the longitudinal axis of the dejection pit. The parallel cheeks 13 and facing the frame 2 are interconnected by two substantially parallel bars 8, that is to say more or less 25 °, which each form a support bar for a blade by mounting pivoting of said blade about an axis XX 'coaxial with the support bar 8.

It is noted that the leading edge 9 of each blade 3A, 3B is spaced from the axis XX 'pivot of the blade 3A, 3B by a distance greater than the distance separating the axis XX' pivot from the edge 10 of the blade 3A, 3B opposite the leading edge 9 so that each blade 3A or 3B tends under the effect of its own weight to be returned to the active support position on the ground from its leading edge 9.

The frame 2 further comprises reinforcing elements 16 in the form of spacers extending between the support bars 8 to improve the mechanical strength of the frame 2 and avoid deformation of the latter.

Each cheek 13 is further equipped with at least one, in this case two rolling members 14, such as rollers, which extend at least partially projecting from the so-called external face of the cheek 13 opposite the face of the cheek opposite the other cheek. These rollers 14 are supported along the side walls of the installation 20 during the back-and-forth movement of the frame 2.

To allow such a reciprocating movement of the frame 2, the displacement driving means of the frame 2 comprise a mechanism 4 for driving the reciprocating movement of the frame 2 configured to form, during each movement back and forth of the frame 2, a drive member for moving the blades 3A or 3B for the passage of the blades 3A and 3B from one position to another.

In detail, this mechanism 4 for driving the movement back and forth of the frame 2, that is to say according to a forward movement and according to a return movement of the frame 2, comprises a pulling bar 5 equipped with a drive cable control 6 moving back and forth from said pull-up bar 5 and as a result of the frame 2. The cable control 6 therefore comprises two directions of control of the pull-up bar 5, one corresponding to the forward movement of the frame 2, the other corresponding to the return movement of the frame 2.

The cable is coupled to the drawbar 5 to drive the drawbar 5 back and forth in a manner known per se. This cable can, for example, form a loop wound around two pulleys mounted movable in one direction or the other depending on the direction of movement desired for the drawbar 5 and the frame 2.

Alternatively, the cable can be formed from two sections of cable each wrapped around a winch.

Thanks to this cable control 6, the traction bar 5 can be moved back and forth. This traction bar 5 moves the frame 2 in displacement.

In the examples shown, this traction bar 5 extends between the cheeks 13 of the frame 2 parallel to the latter. This traction bar 5 is mounted on the movable frame 2 sliding in a direction parallel to the direction of back-and-forth movement of the frame 2 between a first and a second position. It is configured to pass from one position to another after each reversal of the direction of control of the control command 6 for back-and-forth movement of said pull-up bar 5.

For this sliding assembly, the pull-up bar 5 is provided with two oblong slots 15 axially offset along the pull-up bar 5 and with a longitudinal axis parallel to the direction of movement back and forth of the frame 2. Each light 15 is crossed by a bar 8 supporting a blade of the frame 2.

Thus, when driving the traction bar 5 in displacement using the cable control 6 in a direction of movement corresponding to the direction followed by the frame 2, for example during its forward movement, the bar 5 of traction is moved to slide until the blade support bars 8 bear against one of the ends, called the first end, of each oblong opening of the traction bar 5 which they pass through. In this position, which corresponds to a first position of the traction bar 5 relative to the frame 2, the continued traction exerted by the cable on the traction bar 5 causes the frame 2 to move.

Similarly, when driving the traction bar 5 in displacement using the cable control in a direction of movement corresponding to the direction followed by the frame 2 during its return movement, the bar 5 of traction is moved to slide until the bars 8 blade support bear against one end, said second end, of each oblong opening of the traction bar 5 which it crosses. In this position, which corresponds to a second position of the drawbar relative to the frame 2, the continued traction exerted by the cable on the drawbar 5 causes the frame 2 to move.

In the examples shown, each blade 3A and 3B is divided into two aligned blade sections and the traction bar 5 extends between said blade sections to allow pivoting movement of each blade without the traction bar 5 interfering such a pivoting movement.

The pull-up bar 5 is equipped with at least two stops. In the examples shown, the drawbar includes four stops per blade. The active stops on the blade 3A are shown at 71 in the figures while the active stops on the blade 3B are shown at 72 in the figures. These stops are each time active on the blade with which they are associated by bearing contact on said blade.

The stops 71 associated with the blade 3A form stops for retaining the blade 3A in the inactive position in the first position of the drawbar as illustrated in FIG. 6, while the stops 72 associated with the blade 3B form blade retaining stops 3B in the inactive position in the second position of the drawbar 5 as illustrated in FIG. 7.

The blades 3A and 3B are thus alternately in the active position and occupy, one, an active position during the forward movement of the frame 2, the other, an active position during the return movement of the frame 2. These blades are therefore active at Alternatively. These blades 3A and 3B cannot be simultaneously in the active position. When one of the blades is in the active position, the other blade is in the inactive position and vice versa.

Thus, in FIG. 6 which corresponds, for example, to the forward movement, that is to say to a movement to the right of the frame 2, the blade 3A is in the inactive position and the blade 3B is in the active position and the bars 8 blade support are arranged in abutment on the left end of the oblong slots 15, that is to say the downstream or rear end relative to the direction of movement of the traction bar 5 and the frame 2.

In FIG. 7 which corresponds to the return movement of the frame 2, that is to say here to a movement to the left of the frame 2, the blade 3A is in the active position and the blade 3B is in the inactive position, and the bars 8 blade support are arranged in abutment on the right end of the oblong slots 15, that is to say the downstream or rear end relative to the direction of movement of the traction bar 5 and of the frame 2.

The stops 71 and 72 of the traction bar 5 are, in the positioned state of the frame 2 on the ground with the pivot axis XX ′ arranged horizontally, arranged at least partially above the plane passing through the bars 8 support d 'a blade 3A, 3B. Each blade 3A, 3B has a so-called upper part 11, corresponding to the part of the blade 3A, 3B disposed between its edge 10 opposite its leading edge 9 and the pivot axis XX ′, disposed, in the active position of the blade 3A, 3B, on the path capable of being followed by one of the stops 71,72 during a sliding movement of the drawbar 5 to allow said stop 71, 72 to act as a pusher on the part 11 upper blade 3A, 3B when passing the traction bar 5 from one position to another.

Thus, for example in Figures 6 and 7, the stop 71 is, in the first position of the traction bar 5 relative to the frame 2, disposed opposite the upper part 11 of the blade 3A which is in the active position. When the drawbar moves to the second position relative to the frame, the stop 71 pushes on the upper part 11 of the blade 3A and makes it pivot with its support bar 8 around the axis XX 'up to in an inactive position in which the stop 71 bears on the face of the blade 3A turned towards the sky, said blade extending in the inactive position substantially horizontally. When the drawbar 5 returns to the first position, the blade 3A returns under the effect of its own weight in the active position.

The operation is the same for the stop 72 associated with the blade 3B. The stop 72 is, in the second position of the traction bar 5 relative to the frame 2, arranged opposite the upper part 11 of the blade 3B. This stop 72 is in abutment on the face of the blade 3B turned towards the sky in the first position of the traction bar 5 relative to the frame 2.

In the examples shown, each of the stops 71, 72 of the pull-up bar 5 takes the form of a curved tongue arranged along one of the so-called upper longitudinal edges 151 of one of the oblong slots 15 of the bar 5 traction.

The curved stops 71.72 form an inverted V between them. Each stop 71 or 72 has a concave face turned towards the end closest to the pull-up bar 5 and a convex face turned towards the other stop.

To complete the assembly, the scraper 1 comprises for each blade 3A and 3B at least one member 12 for limiting the angular displacement of said blade 3A, 3B in the direction of activation of the blade 3A, 3B corresponding to the pivoting movement of the blade 3A, 3B from the inactive position to the active position. Said limiting member 12, mounted on the frame 2 and / or on the traction bar 5, is disposed on the path followed by said blade 3A, 3B for its passage from the inactive position to the active position to prevent angular displacement of said blade 3A, 3B beyond a predetermined angular position.

In the examples shown, there are provided four members 12 for limiting angular displacement per blade, namely two arranged on the cheeks 13 of the frame and two on the traction bar 5 on either side of the traction bar 5.

A member for limiting the angular displacement of the bar cooperates with a member for limiting the angular movement of the frame to limit a section of blade in angular displacement.

Each angular displacement limitation member assumes the shape of a stud projecting from the cheek or from the pull bar which carries it.

The operation of such a scraper is similar to that of a prior art scraper with the exception of the number of passages which is halved for an identical scraping efficiency.

This scraper 1 is therefore positioned in abutment on the bottom of the pit with the axes XX 'pivot of the blades extending substantially horizontally to within approximately 15 ° relative to the horizontal, and the rolling members 14 cheeks 13 of the scraper resting on the side walls of the pit.

The scraper 1 disposed at one end of the pit is, by means of the cable control 6, driven in axial displacement in a direction parallel to the longitudinal axis of the pit in a first direction to cover a length of pit. During this movement, the blade 3A is active and the blade 3B is inactive. Once the pit has been traversed, the scraping operation is completed. A new scraping operation can start a few hours later. The scraper is therefore driven in an opposite direction along the pit to return to its starting position. During this movement, the blade 3A is inactive and the blade 3B is active.

The tilting of the blades between active and inactive position takes place at each change of direction during the relative movement between drawbar 5 and frame

2. The drawbar 5 is moved to slide so that each blade support bar of the frame 2 passes from one end to another of the oblong openings of the drawbar 5. During this movement, the positions of the blades are modified.

Claims (10)

Claims 1. A scraper (1) intended for scraping the bottom of a pit (21), such as a pit (21) for recovering manure for installation (20) for breeding animals, said scraper (1) comprising a frame (2) support for scraper blades (3A, 3B) and means for driving in movement of the frame (2) comprising a mechanism (4) for controlling drive in reciprocating movement of said frame (2 ) in a direction of movement, each blade (3A, 3B) scraping being mounted on the frame (2) pivotally movable about an axis (XX ¹ ) pivot extending orthogonally to the direction of movement back and forth -from the frame (2) to allow, in the positioned state of the frame (2) on the ground with the axis (XX ¹ ) pivot extending horizontally, the passage of said blade (3A; 3B) of a active scraping position in which an edge (9) of the blade attack edge (3A; 3B) is brought closer to the ground and is capable of coming into bearing contact with the ground in an inactive retracted position in which said edge ( 9 ) of blade attack (3A; 3B) is removed from the ground, the control mechanism (4) being configured to form, during each back and forth movement of the frame (2), a drive member for moving the blades (3A; 3B) for the passage of blades (3A; 3B) from one position to another, characterized in that the blades (3A; 3B) are alternately in the active position and occupy one, an active position during the forward movement of the frame (2), l 'other, an active position during the return movement of the frame (2). 2. A scraper (1) according to claim 1, characterized in that the mechanism (4) for driving the reciprocating movement of the frame (2) comprises a traction bar (5) equipped with a control (6), preferably cable, for back-and-forth movement of said traction bar (5), said traction bar (5) being mounted on the movable frame (2) sliding in a direction parallel to the direction of reciprocating movement of the frame (2) between a first and a second position and being configured to pass from one position to another after each reversal of the direction of control of the control (6) of back-and-forth movement drive of said traction bar (5), this traction bar (5) being equipped with at least two stops (71, 72) forming one or more, a stop (71) of retaining one of the blades (3A) in the inactive position in the first position of the traction bar (5), the other or the others, a retaining stop (72) on the other (3B) of the blades (3A, 3B) in the inactive position in the second position of the traction bar (5). 3. Scraper (1) according to one of claims 1 or 2, characterized in that the leading edge (9) of each blade (3A, 3B) is spaced from the axis (XX ¹ ) pivot of the blade (3A, 3B) by a distance greater than the distance separating the pivot axis (XX ¹ ) from the edge (10) of the blade (3A, 3B) opposite the leading edge (9). 4. Scraper (1) according to one of claims 1 to 3, characterized in that the frame (2) blade support (3A, 3B) comprises two facing flanges (13) parallel connected together by a connecting structure comprising two substantially parallel rotary bars (8) extending orthogonally to the direction of reciprocating movement of the frame (2) and each forming a bar (8) supporting a blade (3A, 3B) for mounting pivoting of said blade (3A, 3B). 5. A scraper (1) according to claim 4, taken in combination with claim 2, characterized in that the pulling bar (5) is, for its sliding mounting on the frame (2), provided with two lights (15 ) oblong axially offset along the bar (5) of traction and longitudinal axis parallel to the direction of movement back and forth of the frame (2), each lumen (15) being traversed by a bar (8) support of a blade (3A, 3B) of the frame (2). 6. Scraper (1) according to one of claims 4 or 5 taken in combination with claim 2, characterized in that the stops (71, 72) of the traction bar (5) are, in the position of the frame (2) on the ground with the axis (XX ¹ ) pivot arranged horizontally, arranged at least partially above the plane passing through the bars (8) supporting a blade (3A, 3B) and in that each blade (3A, 3B) has a part (11) called upper, corresponding to the part of the blade (3A, 3B) disposed between its edge (10) opposite its leading edge (9) and the axis (XX ¹ ) pivot, arranged in the active position of the blade (3A, 3B), on the path capable of being followed by one of the stops (71, 72) during a sliding movement of the bar (5) of traction to allow said stop (71, 72) to act as a pusher on the upper part (11) of the blade (3A, 3B) when passing the traction bar (5) from one position to a other. 7. A scraper (1) according to claim 5 or claim 6 taken in combination with claim 5, characterized in that at least one of the stops (71, 72) of the bar (5) of traction affects the shape of a curved tongue arranged along one of the longitudinal edges (151) called upper of one of the slots (15) oblong of the bar (5) of traction. 8. Scraper (1) according to one of claims 1 to 7, characterized in that it comprises, for each blade (3A, 3B), at least one member (12) for limiting the angular displacement of said blade (3A , 3B) in the direction of activation of the blade (3A, 3B) corresponding to the pivoting movement of the blade (3A, 3B) from the inactive position to the active position, said limiting member (12) mounted on the frame (2) and / or on the traction bar (5), being disposed on the path followed by said blade (3A, 3B) for its passage from the inactive position to the active position to prevent angular displacement of said blade (3A, 3B) beyond a predetermined angular position. 9. Livestock installation (20) comprising a breeding zone situated above a droppings recovery pit (21), said installation (20) comprising at least one scraper (1) capable of scraping the bottom ( 22) of the pit (21), characterized in that the scraper (1) conforms to one of claims 1 to 8 and in that the mechanism (4) for driving the drive back and forth comes from said frame (2) is configured to drive the frame (2) in displacement in a direction of movement, parallel to a longitudinal axis of the pit in the positioned state of the frame (2) on the bottom (22) of the pit (21). 10. Installation (20) for breeding according to claim 9, characterized in that the pit (21) with a longitudinal axis corresponding to the direction of reciprocating movement of the scraper (1) is provided, at each of its ends , of a transverse pipe (23) for evacuating manure.