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: Background of the Invention 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 and the teachings of that patent are incorporated herein by reference. 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 would be desirable to provide a system that overcomes the problems associated with prior art milking parlors and their associated entry/exit systems. In accordance with one aspect of the invention, there is provided a milking parlor comprising an automated system for a milking parlor comprising an entry gate allowing cows entry to milking stalls and an elongate rotatable exit gate urging cows to exit the milking stalls, characterised in that said entry gate is arranged to be actuated automatically in response to actuation of said exit gate. In accordance with another aspect of the invention, there is provided a method of automating a milking parlor of the type having an entry gate, an elongated rotatable gate mounted on a framework for positioning cows in a milking stall and urging the cows to exit the stall after milking and milking units for conducting the milking operation, characterised in that cows are introduced one each into a plurality of stalls into the milking parlor and further characterised in that said method comprises: 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 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 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. In one embodiment of the invention the milking parlor is 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. The present invention thus provides an improved and automated milking parlor entry/exit system. Brief Description of the Drawings The drawings illustrate the best mode presently contemplated of carrying out the invention. In the drawings: Fig. 1 is a plan view of a milking parlor constructed according to 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. Various modes of carrying out the invention are contemplated as being within the scope of the following claims particularly pointing out and distinctly claiming the subject matter regarded as the invention.

Claims: A milking parlor comprising an automated system for a milking parlor comprising an entry gate (102) allowing cows (20) entry to milking stalls and an elongate rotatable exit gate (22) urging cows to exit the milking stalls, characterised in that said entry gate is arranged to be actuated automatically in response to actuation of said exit gate. A milking parlor according to claim 1, wherein said entry gate (102) is arranged to introduce one cow into each of a plurality of stalls in the milking parlor (10) and said exit gate is mounted on a framework for positioning cows in said milking stall, said automated system further comprising: milking units for conducting the milking operation; means for detecting the completion of the milking operation, said milking completion detecting means being operably connected to said rotatable gate (22) to initiate the exiting process of said rotatable gate upon detection of the completion of the milking operation; means for detecting the rotation of said rotatable gate, said rotation detecting means being operably connected to said entry gate (102) to open the entry gate upon detecting a predetermined amount of rotation of said rotatable gate; means for detecting the number of cows passing through said entry gate, said number detecting means being operably connected to said entry gate to close said gate upon detecting a predetermined number of cows entering the milking parlor; and means for detecting the closing of the entry gate, said closing detecting means being operably connected to said rotatable gate to initiate the positioning process of said rotatable gate upon detection of the closing of said entry gate. A milking parlor according to claim 2, wherein the means for detecting the completion of the milking operation comprises means for detecting the removal of the last milking unit. A milking parlor according to claim 2, wherein the means for detecting the number of cows passing through the entry gate comprises means for detecting a cow in the last available stall. A milking parlor according to any preceding claim, wherein said rotatable gate has at least one elongate beam (24) along which animals to be milked are aligned, said rotatable gate being provided with substantially wedge-shaped positioning devices (26) which project upwardly from said beam when in an operative position in which it restrains the animals during milking. A milking parlor according to any preceding claim, further comprising a plurality of rotatable sequencing gates (18) movable between closed positions in which the gates overlap and open positions in which the gates define respective stalls of the milking parlor, said sequencing gates being arranged such that said sequencing gates move from said open positions to said closed positions without slamming together. A milking parlor according to any of claims 1 to 5, further comprising a plurality of rotatable sequencing gates (18) movable between closed positions in which the gates define a wall of passageway and open positions in which the gates define respective stalls of the milking parlour, each said sequencing gate being rotatably mounted on an upwardly extending post (42), each said post having an internal biasing means biasing the respective gate to said closed position. A milking parlor according to any of claims 1 to 4, wherein said rotatable gate (22) is disposed on a framework whereby the elongated gate includes a brisket beam (24), and a plurality of substantially wedge shaped positioning devices (26) spaced along and extending and pointing outwardly and upwardly from the brisket beam (24) and spaced such that a cow (20) is engaged and positioned between adjacent positioning devices. A milking parlour according to claim 8, wherein each said positioning device comprises an arch extending from said brisket beam (24) and defining a triangularly shaped opening. A milking parlour according to claim 9, wherein said arch comprises a tubular loop (28) extending outwardly and upwardly from the brisket beam (24). A milking parlor according to any of claims 1 to 5, further comprising a plurality of elongated sequencing gates (18) movable from a closed position to an open position at which said sequencing gates define a stall, wherein each of the sequencing gates is pivotally mounted on an upwardly extending pedestal (42) and movable between a closed position in which a portion of said sequencing gate overlaps a portion of an adjacent sequencing gate in a closed position and an open position defining a stall in cooperation with an adjacent sequencing gate in an open position, and said sequencing gates are mounted at substantially equal heights and when in said closed position define a gap (38) between said sequencing gates so that said sequencing gates overlap without touching when in said closed position. A milking parlor according to any of claims 1 to 5, further comprising a plurality of elongated sequencing gates (18) movable from a closed to an open position at which said sequencing gates define a stall, wherein: each of the sequencing gates is pivotally mounted on an upwardly extending pedestal (42) and movable between a closed position in which a portion of said sequencing gate overlaps a portion of an adjacent sequencing gate in a closed position and an open position defining a stall in cooperation with an adjacent sequencing gate in an open position, and a biasing means is disposed within said pedestal urging said sequencing gate to said closed position. A milking parlor according to claim 12, wherein said biasing means comprises a torsional spring (40) assembly concentrically mounted inside said pedestal. A method of automating a milking parlor of the type having an entry gate (102), an elongated rotatable gate (22) mounted on a framework for positioning cows in a milking stall and urging the cows to exit the stall after milking and milking units for conducting the milking operation, characterised in that cows (20) are introduced one each into a plurality of stalls into the milking parlor and further characterised in that said method comprises: detecting the completion of the milking operation; initiating the exiting process of the rotatable gate (22) upon detecting the completion of the milking operation; detecting the rotation of the rotatable gate (22); opening the entry gate (102) upon detecting a predetermined amount of rotation of the rotatable gate (22); detecting the number of cows passing through the entry gate (102); 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 (22) upon detecting the closing of the entry gate. A method according to claim 14, wherein the step of detecting the completion of the milking operation comprises detecting the removal of the last milking unit. A method according to claim 15, wherein the step of detecting the number of cows passing through the entry gate (102) comprises detecting a cow in the last available stall.

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