Automated milking parlor

Abstract: A milking parlor of the type utilizing a plurality of sequencing gates mounted on pedestals at substantially the same height with the gates overlapping, but not touching. A biasing means that urges the sequencing gate to a closed position is mounted co-axially and inside the pedestal supporting the sequencing gate. A wedge shaped positioning device is mounted on the rotating gate to urge the cows into the proper milking position and an automated system detects the end of the milking process and the positioning of the last cow to automatically open and close the entry gate.

Description: This invention relates to in general to the field of cattle stalls and more specifically to a milking parlor having a unique and improved entry/exit and positioning system. While the invention may be utilized with a variety of milking parlor designs, the invention is particularly adapted for use with a milking parlor entry/exit system such as that shown in U.S. Patent No. 5,203,280. Rotary reels such as that shown in the '280 patent can be utilized to urge the cows out of the milking stall and to help position the cow in the milking stall. However, it is important to precisely position the cow prior to milking and to have a positioning device that will accommodate various sizes of cows. In the past, rotating, overlapping gates have been utilized to define the milking stalls in parlors of this type. These gates have typically been biased to a closed position by an external spring which could be interfered with and damaged by a moving animal. Also, the gates came into contact upon closing and the noise of a closing gate engaging an adjacent gate would have an adverse impact on the cows. Finally, in earlier prior art milking parlors, it would be necessary for an attendant or operator to manually open an entry gate to allow a new group of cows to enter the parlor after the previously milked cows have been removed from the parlor. Summary of the Invention It is desirable to provide a system that overcomes the problems associated with prior art milking parlors and their associated entry/exit systems. Aspects of the invention are provided in the accompanying claims. In accordance with a preferred embodiment of the invention, the rotating gate of the milking parlor is provided with a plurality of spaced, upwardly angled wedge shaped projections that engage and position the cow in the milking stall. The sequencing gates that define the milking stalls may be mounted at substantially the same height and define a gap between the gates so that the gates can overlap without touching when the gates are in the closed position. The sequencing gates may be biased to a closed position by a spring that is internally and co-axially mounted within the pedestal supporting the sequencing gate. The milking parlor may be provided with a system that detects the conclusion of the milking operation and initiates the exiting process of the rotating reel. Once the rotating reel has reached a predetermined position, the entry gates open and the next group of cows is allowed to enter the parlor. Upon detecting a predetermined number of cows passing through the entry gate, the entry gate is closed and the rotating reel is indexed to position the cows within their stalls. Brief Description of the Drawings In the drawings: Fig. 1 is a plan view of a milking parlor constructed according to a preferred embodiment of the present invention; Fig. 2 is an enlarged plan view of the stall area of the milking parlor of Fig. 1; Fig. 3 is a cross-sectional view along the line 3-3 of Fig. 1; Fig. 4 is a sectional view taken along the line 4-4 of Fig. 2; Fig. 5 is a sectional view taken along the line 5-5 of Fig. 4; Fig. 6 is a cross-sectional view of the pedestal supporting the sequencing gate; Fig. 7 is a sectional view along the line 7-7 of Fig. 6; Fig. 8 is a sectional view along the line 8-8 of Fig. 6; Fig. 9 is a sectional view along the line 9-9 of Fig. 6; Fig. 10 is an end view of the entry gate for the milking parlor; Fig. 11 is a plan view of the entry gate of Fig. 10; Fig. 12 is a side cross-sectional view of the rotating gate utilized in the milking parlor. Fig. 13 is a sectional view along the line 13-13 of Fig. 10; Fig. 14 is a plan view of an alternate embodiment of the switch shown in Fig. 13; and Fig. 15 is a schematic view of the pneumatic air logic utilized to control the milking parlor entry and exit operation. Detailed Description of the Preferred Embodiment FIGS. 1 and 2 illustrate a milking parlor 10 of the type having a centrally located operator pit 12 with cow stands or platforms 14 disposed on either side. A plurality of milking stalls 16 are defined by a plurality of sequencing gates 18. As seen in FIG. 2, sequencing gates 18 are biased to a normally closed position and as a cow 20 proceeds down platform 14, it is directed against sequencing gate 18 and forced to move it to its open position as shown in FIG. 1. When in their open position, adjacent sequencing gates 18 define milking stall 16. Milking parlor 10 is also provided with a rotating reel type gate 22 constructed and operated according to the teachings of U.S. Patent 5,203,280 which is incorporated herein by reference. Brisket beam 24 of rotating gate 22 is provided with a plurality of spaced apart upwardly inclined wedge shaped positioning devices 26 which are formed from a tubular loop 28 that defines a triangularly shaped central opening 30. When brisket beam 24 is rotated to position cows 20, the wedge shaped upwardly angled loop 28 engages the cow on her shoulder and encourages the cow to move toward the center of milking stall 16. The wedge shape and the upward inclination of positioning device 26 helps position and center cows of various sizes. As best seen in FIGS. 4 and 5, sequencing gates 18 are formed from a tubular framework 32 that has a forward tapering end 34 and a squared rear end 36. When gates 18 are in their closed position, tapered end 34 nests within squared end 36 of an adjacent gate. Sequencing gates 18 are also provided with a stop so that a gap 38 is established between the gates when they are in their closed position. The nesting feature and the gap 38 prevent any contact of tubular framework 32 with that of an adjacent gate. As discussed above, sequencing gates 18 are biased to a closed position and the nesting and gap prevent unwanted noise when the gates automatically swing to their closed position upon the exiting of the cows. This quiet closing of gates 18 is important since it is desirable not to disturb or frighten the next group of cows entering milking platform 14. As discussed above, sequencing gates 18 are biased to a closed position. This is accomplished by means of a torsion spring 40 mounted internally and co-axially with gate pedestal 42. Upper end 44 of torsion spring 40 is fixedly mounted in bushing assembly 46, while lower end 48 of torsion spring 40 is fixedly connected to lower bushing 50. Lower bushing 50 is held in place and prevented from rotating by the head 52 of eye bolt 54. The threaded end 56 of eye bolt 54 passes through upper bushing 46 and is held in place by nut 58. The head 52 of eye bolt 54 is held in place by pin 60 that passes through inner sleeve 62. Intermediate sleeve 64 is provided with a collar 66 that has an upwardly projecting stop 68. When sequencing gate 18 is pivoted clockwise by a cow entering the stall, torsion spring 40 is coiled. When the cow exits the stall, coil torsion spring 44 moves the sequencing gate counterclockwise to its closed position. Stop 68 engages edge 70 to stop the rotation of sequencing gate 18 and establish gap 38 described above. Milking parlor 10 is also provided with an automated entry/exit system that is controlled by the air logic diagram shown in FIG. 15. Drive cylinder 72, lock cylinder 74 and index cylinder 76 are positioned on the framework for rotating reel gate 22 and operate according to the teachings of the '280 patent. The operation of the automated system is initiated by an input signal 78 that is generated after the last milking unit is removed from a cow. A slight delay is provided so that if a milking unit is re-attached, the entry/exit process will not be initiated. The entry/exit process can also be initiated manually by use of push button valve 80. The system is provided with a series of push button valves 82 through 98 so that the entry/exit procedure can be started or stopped manually at any time. Upon receiving the input signal 78 or being manually started, the system initiates the movement of the rotating gate 22 to exit the unmilked cows. This operation is according to the '280 patent. When the exiting procedure has been completed, entrance gate cylinder 100 is energized and entrance gates 102 are opened via cylinder linkage 104. Simultaneously, a crowding gate (not shown) is activated to urge the cows in a holding area towards entrance gate 102. As the cows enter single file through entrance gate 102 and onto platform 14, the first cow will open the first sequencing gate 18 forcing the second cow to open the second sequencing gate and so on down the line. The last stall is provided with a wand detection system 106 as shown on FIG. 13. A cow 108 entering the last stall will brush up against wand 106 and close switch 110. This signal reverses entrance gate cylinder 100 and causes entrance gates 102 to close. Once gates 102 are closed, indexing cylinder 76 is energized to complete the positioning of the cows as described in the '280 patent. FIG. 14 illustrates an alternate embodiment for detecting the presence of a cow in the last stall. In this embodiment, a beam of light 112 is generated across the stall area and when a cow 108 enters the stall and breaks the beam, the gate closing process is initiated.

Claims: An elongate rotatable gate (22) for use as a restraining means in a milking parlor, said gate (22) having at least one elongate beam (24) along which animals to be milked are aligned, said gate (22) being provided with a plurality of substantially wedge-shaped projections (26) which project upwardly from said beam (24) when in its operative position in which it restrains the animals during milking. The gate (22) as claimed in claim 1 wherein said elongate beam is a brisket beam (24), said gate further being provided with a positioning device to engage and position a cow comprising: the plurality of substantially wedge-shaped projections (26) spaced along and extending and pointing outwardly and upwardly from the brisket beam (24) and spaced such that the cow is engaged and positioned between adjacent wedge-shaped projections (26). The gate as claimed in claim 2 wherein said positioning device comprises an arch extending from said brisket beam (24) and defining a triangularly shaped opening (30). The gate as claimed in claim 3 wherein said arch comprises a tubular loop (28) extending outwardly and upwardly from the brisket beam. A milking parlour including a gate as claimed in any one of claims 1 to 4 mounted on a framework. The milking parlour as claimed in claim 5 further comprising a plurality of sequencing gates (18) movable from a closed position to an open position at which said gates define a stall, each of said sequencing gates (18) being pivotally mounted on an upwardly extending pedestal (42) and movable between a closed position in which a portion of said gate (18) overlaps a portion of an adjacent gate in a closed position and an open position defining a stall in cooperation with an adjacent gate in an open position, said sequencing gates being mounted at substantially equal heights and when in said closed position defining a gap (38) between said sequencing gates so that said sequencing gates overlap without touching when in said closed position. The milking parlour (10) as claimed in claim 5 further including a plurality of sequencing gates (18) movable from a closed to an open position at which said sequencing gates (18) define a stall, each of said sequencing gates (18) being pivotally mounted on an upwardly extending pedestal (42) and movable between a closed position in which a portion of said gate (18) overlaps a portion of an adjacent gate (18) in a closed position and an open position defining a stall in cooperation with an adjacent gate in an open position, and biasing means disposed within said pedestal urging said gate to said closed position. The milking parlous (10) as claimed in claim 7 wherein said biasing means comprises a torsional spring assembly (40) concentrically mounted inside said pedestal (42). The milking parlour (10) as claimed in claim 5 further including a plurality of rotatable sequencing gates (18) movable between closed positions in which the gates (18) overlap and open positions in which the gates (18) define respective stalls of the milking parlor, said gates (18) being arranged such that said gates move from said open positions to said closed positions without slamming together. The milking parlour (10) as claimed in claim 5 further including a plurality of rotatable sequencing gates (18) movable between closed positions in which the gates define a passageway and open positions in which the gates (18) define a plurality of milking stalls, each said gate being rotatably mounted on an upwardly extending post (42), each said post having an internal biassing means (40) biassing the respective gate to said closed position. A method for automating a milking parlor as claimed in any one of claims 5 to 10, said milking parlour further including an entry gate (18) through which cows are introduced one each into a plurality of stalls into the milking parlor and milking units for conducting the milking operation, wherein said elongated rotatable gate (22) positions cows in a milking stall and urges the cows to exit the stall after milking, said method comprising: detecting the completion of the milking operation, initiating the exiting process of the rotatable gate upon detecting the completion of the milking operation, detecting the rotation of the rotatable gate, opening the entry gate (102) upon detecting a predetermined amount of rotation of the rotatable gate, detecting the number of cows passing through the entry gate, closing the entry gate (102) upon detecting a predetermined number of cows passing through the entry gate, detecting the closing of the entry gate and initiating the positioning process of the rotatable gate upon detecting the closing of the entry gate.

Inventors: NELSON WILLIAM S, NELSON, WILLIAM S.
Applicants: DEC INT, DEC INTERNATIONAL, INC.
Application year: 1996
Main classification: A01K1
IPC codes: A01K1