CA1069076A - Automatic stripping and removal device - Google Patents
Automatic stripping and removal deviceInfo
- Publication number
- CA1069076A CA1069076A CA267,215A CA267215A CA1069076A CA 1069076 A CA1069076 A CA 1069076A CA 267215 A CA267215 A CA 267215A CA 1069076 A CA1069076 A CA 1069076A
- Authority
- CA
- Canada
- Prior art keywords
- lever
- milking
- milk
- stripping
- milking devices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention provides a device for automatic stripping upon reaching a specific milk volume flow in the milking of a cow in a milking stall and for automatically removing teat cups of milking devices when the automatic stripping is complete, as a function of the milk volume flow by means of a working cylinder and cable attached thereto said device comprising a two armed lever pivotably mounted about a point of support, milking devices flexibly secured to one end of said lever and stripping cylinder flexibly secured to the other end of said lever, a bearing, disposed below said point of support providing for horizontal movement of said lever, said bearing being connected to said stall by a supporting arm so as to be swingable in a circular path, said lever and said stripping cylinder being swingable about a fulcrum of said supporting arm by means of said cable on actuation of said working cylinder, said milking devices being suspended such that below said lever a universal hinge is provided with a milk collecting member suspended therefrom and an offset rigid support with a vacuum distributor attached thereto is provided above the said lever, pairs of pulsation hoses extending between said vacuum distributor and said milking devices and being of such length that they provide for lowering of the milking devices while simultaneously bending milk hoses extending between said milking devices and said milk collecting member.
The present invention provides a device for automatic stripping upon reaching a specific milk volume flow in the milking of a cow in a milking stall and for automatically removing teat cups of milking devices when the automatic stripping is complete, as a function of the milk volume flow by means of a working cylinder and cable attached thereto said device comprising a two armed lever pivotably mounted about a point of support, milking devices flexibly secured to one end of said lever and stripping cylinder flexibly secured to the other end of said lever, a bearing, disposed below said point of support providing for horizontal movement of said lever, said bearing being connected to said stall by a supporting arm so as to be swingable in a circular path, said lever and said stripping cylinder being swingable about a fulcrum of said supporting arm by means of said cable on actuation of said working cylinder, said milking devices being suspended such that below said lever a universal hinge is provided with a milk collecting member suspended therefrom and an offset rigid support with a vacuum distributor attached thereto is provided above the said lever, pairs of pulsation hoses extending between said vacuum distributor and said milking devices and being of such length that they provide for lowering of the milking devices while simultaneously bending milk hoses extending between said milking devices and said milk collecting member.
Description
"~ 6~3V~
The present invention relates to a device for automatic stripping upon attaining a specific milk volume flow and for automatically removing the teat cups when the automatic stripping is completed, particularly in milking installations.
The oontinuously increasing concentration of animals requires afurther automation of the milking process in order to increase the operation productivity and in order to save on physically heavy work to the greatest extent possible. The desire is to carry out by hand only the examination of the udders and the attaching of the milking devices and to automate the entire remaining process. Tests carried out in greater detail have shown that in order to increase the milk yield, stripping is essential. -In most of the swing-out devices known heretofore stripping was dispensed with for reasons of tehcnical expenditure, which was too high. Because it has been found that the loss in milk yield is substantially higher than the additional technical expenditure, tests were recently carried out to auto-mate the stripping process, to detach the milking utensils from the udder automatically and to remove them from the milking stall of the cow when the milk volume flow ceases. The signal for starting the strippin~ process or for the swing-out -operation is provided by a control device. If the milk volume flow falls short of a specific value, then the stripping process begins. When the milk volume flow slackens again, the control device signals the completion of the stxipping process, the milking devices are swung out and automatically removed. The stripping process is carried out by a vertical or inclined downward pull of the milking devices. The milking device can be swung out horizontally However, since there is not sufficient space under the cow, complex hinges are required so that the multisection supporting arm can be telescopically retracted or ~0ti~)7G
folded and then swung out. Swinging out the milking devices horizontally can also be carried out by means of levers or simply by a cable. On detaching the milking devices from the udder a swing cylinder draws the milking devices away in an inclined upward direction. It is not always possible to ensure that the teat cups tightly seal the short milk hoses nor can it always be avoided that the droppin~ teat cups come in contact with the floor of the milking installation. In order to cause the milk hoses to bend and to seal them so as to avoid penetration of the atmosphere of the cow shed, the teat cups in a conventional device, which swings out horizontally, are secured to rods which are guided vertically and permit a certain lateral motion. The shock of the rods is absorbed by compression springs. The disadvantage lies in that depending on the arrangements of the teats the compression springs are more or less subjected to tensile stress so that the udder is subjected to variable tensile stress. The ball pivot disposed above the bracket cannot fully compensate for these tension differences. During the stripping process the milking devices are swinging and the bracket tries to adjust in the direction of the stripping arm while the transmission of force to the udder is not uniform. When the teat cups drop off they must be pulled downwards so that the milk hoses thus are bent.
In another conventional device the teat cups are guided in a rack consisting of our sections. In contrast to the other structures, the connections for the pulsating air are arranged below the teat rubber cap in this case. The teat cup -can thus be raised within its guide until the short milk hose stretches and is lowered until the pulsation hose is mounted and when the teat cup is lowered the short milk hose should bend.
However, in practice it has been found that this rack obstructs the milker, that the teat cup can be pulled beyond the rack and that upon dropping the teat cup it remains suspended onthe rack -~ and does not seal the milk hose. Milk hoses which are too tightly stretched are partially pressed together at the milk collection ` pipe by the horizontally arranged hose nipples, so that the teat cup does not obtain the required vacuum. The conventional stripping and swing arms have several members and the stripping is carried out either by a z-shaped lever, the mid-portion of which - is rotatably and swingably supported, or by straight levers and ~ toggle levers which are connected to one another. One or even 10 two working cylinders serve for swinging out and one working cylinder serves for stripping. However, in some conventional devices the swinging of the milking arm and the stripping process are carried out with only one working cylinder. These conventional devices have the disadvantage that the space under the cow and at the stall boundaries isnota~equate for properly swinging the milking devices in and out. The milking arm must not obstruct the milker when he attaches the milking devices. Moreover these devices are complex because they are heavy and must be adjusted by a counter-acting force. ~hen carrying out the stripping ~`
process this is effected either by oppositely acting upon the working cylinder with the control medium or by tension springs, the force of which must be additionally overcome when pulling at the udder, and thus requires a larger working cylinder.
Moreover, the long-arm swing devices are very sensitive to deformations.
The invention provides a device which gives an increase in the operating productivity by combining an automatic stripping process and the swinging out of the milking devices.
The present invention thus provides a device for automatic stripping and for swinging out the milking utensils, i.e., a device which saves a great deal of space, does not obstruct the milker, removes the milking devices from the udder without )76 the possibility o~ the teat cups coming in contact with the milking floor when swin~ing out of the region where the cow stands, and the milking cups of which are so attached that, when dropping off, they reliably bend the milk hose and block the vacuum.
According to the present invention there is provided ~ æ~ h ,`n~
a device for automatic stripping upon -r~n~t~ a specific milk volume flow in the milking of a cow in a milking stall and for automatically removing teat cups of milking devices when the automatic stripping is complete, as a function of the milk volume flow by means of a working cylinder and cable attached thereto said device comprising a two armed lever pivotably mounted about a point of support, milking devices flexibly secured to one end of said lever and a stripping cylinder flexibly secured to the other end of said lever, a bearing, disposed below said point of support providing for horizontal movement of said lever, said bearing being connected to said stall by a supporting arm so as to be swingable in a circular path, said lever and said stripping cylinder being swingable about a fulcrum of said supporting arm 20 by means of said cable on actuation of said working cylinder, said milking devices being suspended such that below said lever a universal hinge is provided with a milk collecting member suspended therefrom and an offset rigid support with a vacuum distributor attached thereto is provided above the said lever, pairs of pulsationhoses extending between said vacuum distributor and said milking devices and being of such length that they : -provide for lowering of the milking devices while simultaneously bending milk hoses extending between said milking devices and said milk collecting member. -.
Thus according to the present invention, a two-armed stripping lever, to one end of which the milking devices are flexibly secured and to the other end a stripping cylinder is : .
- : , , . ~ , . . . . .
,. , . :~ , 10~907gi flexibly secured, has below its point of support a bearing for the hori20ntal motion, said bearin~ being connected to the stall construction so that it may be vertically swung by a supporting arm, the stripping lever with the stripping cylinder and the suspension of the milking devices being swingably arranged about the fulcrum of said bearing, by a cable, and below said stripping lever there is the hinge, which is movable all around, with the milk collecting member suspended therefrom and above said stripping lever there is an offset rigid support with a vacuum distributor fastened thereto and the hose lengths of the pulsation hoses in pairs are such as to enable lowering of the teat cups while simultaneously bending the milk hoses~ The milk-collecting member has connecting pieces extending vertically upwards. The connecting pieces are not inclined and the milk hoses leadirlg to the milking cups are secured to said connecting pieces. When the milking devices are attached the support with the vacuum distributor is suitably on the cross bar which is rigidly secured to the milking lever end in a direction towards the head of the cow and the suspension of the milk-collecting member in a direction toward the tail of the cow. Depending on the construction of the stalls the crossbar can also be at a specific angle with the stripping lever. The swing-out cylinder is outside the stall construction and its main piston is connected by a cable to the stripping lever end carrying the milking devices. The supporting arm has a loop through which the cable passes. The loop is provided with a detent.
The advantage of the invention is that it provides with a minimum of expenditure, a stripping and swing out device which is only slightly susceptible to trouble, saves space, does not obstruct work and is properly adaptable.
Because of the comhined swing-out path the teat cups are swung ~C~69076 out firstly horizontally and then vertically so that they do not come in contact with the milking ~loor. The large number o~ hinges and teat-cup guides required heretofore can be dispensed with.
The present invention will be further illustrated by way of the accompanying drawings in which;
Figure 1 is a schematic side view of the stripping device according to one embodiment of the present invention in the stripping position, Figure 2 is a top view of the device of Figure 1, Figure 3 is an end view of the stripping device of Figure 1 in the normal position, Figure 4 illustrates the arrangement of the teat cups of the device of Figure 1 in both the attached position ; and the dropped-off position, Figure 5 is the top view according to Figure 4.
Referring to the drawings, the two-armed stripping -lever comprises the longer lever arm 1 and the shorter lever arm ; 2. The two lever arms 1 and 2 pivot about the point of support 3~ A crossbar 4 is rigidly secured to the end of the longer lever 3. On the head end of the cow a vertical support 5 with a vacuum distributor 6 and the connecting nipples 7 is arranged on the crossbar 4. Below said crossbar 4 on the tail end of the cow the hinge 8 with the milk-collecting member 9 and the connecting nipples 10 is arranged. The hinge 8 is fixedly fastened to the crossbar 4 by a support 34. A pair of pulsation hoses 11 lead to the distributor 6 and are bi~urcated into the short pulsation hoses 12, each of which provides a pair of teat cups 13 with the same working medium.
The teat cups 13 have a vacuum connection 14 for the pulsating vacuum below the teat rubber head 15. The connecting nipples 10 of the milk-collecting member 9 are connected to the nipple 16 " " . ,: :
~ID6~0~7~
on the teat cup 13 by the short milk hoses 17. The short pulsation hoses 12 are so proportionally dimensioned in pairs that all four teat cups 13 are substantially vertical in the milking position. The height is adjusted by changing the position ; of the levers 1 and 2.
A stripping cylinder 18 is hinged to both sides of the short lever 2 by the hinges 19 and 20. A vertically arranged bearing 21, which provide for the horizontal motion of the entire stripping device, is arranged below the point of support 3.
Detents 22 and 23 are provided for limiting the range of horizontal swing to the region of the udder. The bearing 21 is rigidly attached to a supporting arm 24, which is swingable in bearing 25 about a horizontal axis. The range of swing towards the belly of the cow is limited by a detent 26. A
working cylinder 28 is arranged outside the stall 27 in the direction of the milking devices. A cable 29, which is guided by a loop 30 fastened to the supporting arm 24 and is secured to the end of the lever 1, is attached to the piston of the working cylinder 28. The cable 29 has a detent 31. The distance between the detent 31 and the milking devices is such that because of the pulling motion by the working cylinder 28 the cable 29 first moves the lever 1 horizontally since only a slight energy consumption is required, whereupon the detent 31 strikes the loop 30 and swings the supporting arm 24 with the stripping device about the bearing 25 and holds it in this position. A detent 32 and a limit switch 33 switch the device off and switch it on again.
The mode of operation of the device is as follows;
Upon swinging the teat cups 13 under the udder by pulling the rigid support 5 of the stripping lever 1, the teat cups 15 are attached to the udder, whereupon the milking vacuum is released by stretching the short milk hoses 17. The hinge 8 ~ 6~3V~6 enables the teat cups 15 to fit properly to the teats. When the milk volume flow diminishes automatic means (not shown) turns on the stripping vacuum so that a lifting force is produced on the stripping cylinder 18. Said lifting force acts on the udder as a pull. In the rhythmic release of the stripping cylinder 18 the udder again pulls the lever 1 up. secause of the downward j pull the supporting arm 24 tries to swing further inward. However, -, this is limited by the detent 26. When the milk volume flow slackens again a control device (not shown) switches off the milking vacuum. The teat cups 15 are then aerated and the - milking cylinder then exerts a time-limited permanent pull on the teat cups 15, which are withdrawn from the udder. The working cylinder 28 pulls, via the cable 29, the lever 1 horizontally in the direction of the head of the cow. The dropping teat cups 15 cannot tilt downwards since they are held by the pulsation hoses 12. The weight of the teat cups causes the milk hoses 17 to bend at the nipples 10 and to some extent also at the nipple 16 so that the nipples reliably seal while the teat cups 15 assume ; an inclined position. Sloping of the nipple 10 and 16 is not required and is unsuitable. In the meantime the detent 31 has reached the loop 30 and the cable 29 pulls the supporting arm 24 with the stripping device from the region where the cow stands until the detent 32 reaches the limit switch 33 and holds it.
'
The present invention relates to a device for automatic stripping upon attaining a specific milk volume flow and for automatically removing the teat cups when the automatic stripping is completed, particularly in milking installations.
The oontinuously increasing concentration of animals requires afurther automation of the milking process in order to increase the operation productivity and in order to save on physically heavy work to the greatest extent possible. The desire is to carry out by hand only the examination of the udders and the attaching of the milking devices and to automate the entire remaining process. Tests carried out in greater detail have shown that in order to increase the milk yield, stripping is essential. -In most of the swing-out devices known heretofore stripping was dispensed with for reasons of tehcnical expenditure, which was too high. Because it has been found that the loss in milk yield is substantially higher than the additional technical expenditure, tests were recently carried out to auto-mate the stripping process, to detach the milking utensils from the udder automatically and to remove them from the milking stall of the cow when the milk volume flow ceases. The signal for starting the strippin~ process or for the swing-out -operation is provided by a control device. If the milk volume flow falls short of a specific value, then the stripping process begins. When the milk volume flow slackens again, the control device signals the completion of the stxipping process, the milking devices are swung out and automatically removed. The stripping process is carried out by a vertical or inclined downward pull of the milking devices. The milking device can be swung out horizontally However, since there is not sufficient space under the cow, complex hinges are required so that the multisection supporting arm can be telescopically retracted or ~0ti~)7G
folded and then swung out. Swinging out the milking devices horizontally can also be carried out by means of levers or simply by a cable. On detaching the milking devices from the udder a swing cylinder draws the milking devices away in an inclined upward direction. It is not always possible to ensure that the teat cups tightly seal the short milk hoses nor can it always be avoided that the droppin~ teat cups come in contact with the floor of the milking installation. In order to cause the milk hoses to bend and to seal them so as to avoid penetration of the atmosphere of the cow shed, the teat cups in a conventional device, which swings out horizontally, are secured to rods which are guided vertically and permit a certain lateral motion. The shock of the rods is absorbed by compression springs. The disadvantage lies in that depending on the arrangements of the teats the compression springs are more or less subjected to tensile stress so that the udder is subjected to variable tensile stress. The ball pivot disposed above the bracket cannot fully compensate for these tension differences. During the stripping process the milking devices are swinging and the bracket tries to adjust in the direction of the stripping arm while the transmission of force to the udder is not uniform. When the teat cups drop off they must be pulled downwards so that the milk hoses thus are bent.
In another conventional device the teat cups are guided in a rack consisting of our sections. In contrast to the other structures, the connections for the pulsating air are arranged below the teat rubber cap in this case. The teat cup -can thus be raised within its guide until the short milk hose stretches and is lowered until the pulsation hose is mounted and when the teat cup is lowered the short milk hose should bend.
However, in practice it has been found that this rack obstructs the milker, that the teat cup can be pulled beyond the rack and that upon dropping the teat cup it remains suspended onthe rack -~ and does not seal the milk hose. Milk hoses which are too tightly stretched are partially pressed together at the milk collection ` pipe by the horizontally arranged hose nipples, so that the teat cup does not obtain the required vacuum. The conventional stripping and swing arms have several members and the stripping is carried out either by a z-shaped lever, the mid-portion of which - is rotatably and swingably supported, or by straight levers and ~ toggle levers which are connected to one another. One or even 10 two working cylinders serve for swinging out and one working cylinder serves for stripping. However, in some conventional devices the swinging of the milking arm and the stripping process are carried out with only one working cylinder. These conventional devices have the disadvantage that the space under the cow and at the stall boundaries isnota~equate for properly swinging the milking devices in and out. The milking arm must not obstruct the milker when he attaches the milking devices. Moreover these devices are complex because they are heavy and must be adjusted by a counter-acting force. ~hen carrying out the stripping ~`
process this is effected either by oppositely acting upon the working cylinder with the control medium or by tension springs, the force of which must be additionally overcome when pulling at the udder, and thus requires a larger working cylinder.
Moreover, the long-arm swing devices are very sensitive to deformations.
The invention provides a device which gives an increase in the operating productivity by combining an automatic stripping process and the swinging out of the milking devices.
The present invention thus provides a device for automatic stripping and for swinging out the milking utensils, i.e., a device which saves a great deal of space, does not obstruct the milker, removes the milking devices from the udder without )76 the possibility o~ the teat cups coming in contact with the milking floor when swin~ing out of the region where the cow stands, and the milking cups of which are so attached that, when dropping off, they reliably bend the milk hose and block the vacuum.
According to the present invention there is provided ~ æ~ h ,`n~
a device for automatic stripping upon -r~n~t~ a specific milk volume flow in the milking of a cow in a milking stall and for automatically removing teat cups of milking devices when the automatic stripping is complete, as a function of the milk volume flow by means of a working cylinder and cable attached thereto said device comprising a two armed lever pivotably mounted about a point of support, milking devices flexibly secured to one end of said lever and a stripping cylinder flexibly secured to the other end of said lever, a bearing, disposed below said point of support providing for horizontal movement of said lever, said bearing being connected to said stall by a supporting arm so as to be swingable in a circular path, said lever and said stripping cylinder being swingable about a fulcrum of said supporting arm 20 by means of said cable on actuation of said working cylinder, said milking devices being suspended such that below said lever a universal hinge is provided with a milk collecting member suspended therefrom and an offset rigid support with a vacuum distributor attached thereto is provided above the said lever, pairs of pulsationhoses extending between said vacuum distributor and said milking devices and being of such length that they : -provide for lowering of the milking devices while simultaneously bending milk hoses extending between said milking devices and said milk collecting member. -.
Thus according to the present invention, a two-armed stripping lever, to one end of which the milking devices are flexibly secured and to the other end a stripping cylinder is : .
- : , , . ~ , . . . . .
,. , . :~ , 10~907gi flexibly secured, has below its point of support a bearing for the hori20ntal motion, said bearin~ being connected to the stall construction so that it may be vertically swung by a supporting arm, the stripping lever with the stripping cylinder and the suspension of the milking devices being swingably arranged about the fulcrum of said bearing, by a cable, and below said stripping lever there is the hinge, which is movable all around, with the milk collecting member suspended therefrom and above said stripping lever there is an offset rigid support with a vacuum distributor fastened thereto and the hose lengths of the pulsation hoses in pairs are such as to enable lowering of the teat cups while simultaneously bending the milk hoses~ The milk-collecting member has connecting pieces extending vertically upwards. The connecting pieces are not inclined and the milk hoses leadirlg to the milking cups are secured to said connecting pieces. When the milking devices are attached the support with the vacuum distributor is suitably on the cross bar which is rigidly secured to the milking lever end in a direction towards the head of the cow and the suspension of the milk-collecting member in a direction toward the tail of the cow. Depending on the construction of the stalls the crossbar can also be at a specific angle with the stripping lever. The swing-out cylinder is outside the stall construction and its main piston is connected by a cable to the stripping lever end carrying the milking devices. The supporting arm has a loop through which the cable passes. The loop is provided with a detent.
The advantage of the invention is that it provides with a minimum of expenditure, a stripping and swing out device which is only slightly susceptible to trouble, saves space, does not obstruct work and is properly adaptable.
Because of the comhined swing-out path the teat cups are swung ~C~69076 out firstly horizontally and then vertically so that they do not come in contact with the milking ~loor. The large number o~ hinges and teat-cup guides required heretofore can be dispensed with.
The present invention will be further illustrated by way of the accompanying drawings in which;
Figure 1 is a schematic side view of the stripping device according to one embodiment of the present invention in the stripping position, Figure 2 is a top view of the device of Figure 1, Figure 3 is an end view of the stripping device of Figure 1 in the normal position, Figure 4 illustrates the arrangement of the teat cups of the device of Figure 1 in both the attached position ; and the dropped-off position, Figure 5 is the top view according to Figure 4.
Referring to the drawings, the two-armed stripping -lever comprises the longer lever arm 1 and the shorter lever arm ; 2. The two lever arms 1 and 2 pivot about the point of support 3~ A crossbar 4 is rigidly secured to the end of the longer lever 3. On the head end of the cow a vertical support 5 with a vacuum distributor 6 and the connecting nipples 7 is arranged on the crossbar 4. Below said crossbar 4 on the tail end of the cow the hinge 8 with the milk-collecting member 9 and the connecting nipples 10 is arranged. The hinge 8 is fixedly fastened to the crossbar 4 by a support 34. A pair of pulsation hoses 11 lead to the distributor 6 and are bi~urcated into the short pulsation hoses 12, each of which provides a pair of teat cups 13 with the same working medium.
The teat cups 13 have a vacuum connection 14 for the pulsating vacuum below the teat rubber head 15. The connecting nipples 10 of the milk-collecting member 9 are connected to the nipple 16 " " . ,: :
~ID6~0~7~
on the teat cup 13 by the short milk hoses 17. The short pulsation hoses 12 are so proportionally dimensioned in pairs that all four teat cups 13 are substantially vertical in the milking position. The height is adjusted by changing the position ; of the levers 1 and 2.
A stripping cylinder 18 is hinged to both sides of the short lever 2 by the hinges 19 and 20. A vertically arranged bearing 21, which provide for the horizontal motion of the entire stripping device, is arranged below the point of support 3.
Detents 22 and 23 are provided for limiting the range of horizontal swing to the region of the udder. The bearing 21 is rigidly attached to a supporting arm 24, which is swingable in bearing 25 about a horizontal axis. The range of swing towards the belly of the cow is limited by a detent 26. A
working cylinder 28 is arranged outside the stall 27 in the direction of the milking devices. A cable 29, which is guided by a loop 30 fastened to the supporting arm 24 and is secured to the end of the lever 1, is attached to the piston of the working cylinder 28. The cable 29 has a detent 31. The distance between the detent 31 and the milking devices is such that because of the pulling motion by the working cylinder 28 the cable 29 first moves the lever 1 horizontally since only a slight energy consumption is required, whereupon the detent 31 strikes the loop 30 and swings the supporting arm 24 with the stripping device about the bearing 25 and holds it in this position. A detent 32 and a limit switch 33 switch the device off and switch it on again.
The mode of operation of the device is as follows;
Upon swinging the teat cups 13 under the udder by pulling the rigid support 5 of the stripping lever 1, the teat cups 15 are attached to the udder, whereupon the milking vacuum is released by stretching the short milk hoses 17. The hinge 8 ~ 6~3V~6 enables the teat cups 15 to fit properly to the teats. When the milk volume flow diminishes automatic means (not shown) turns on the stripping vacuum so that a lifting force is produced on the stripping cylinder 18. Said lifting force acts on the udder as a pull. In the rhythmic release of the stripping cylinder 18 the udder again pulls the lever 1 up. secause of the downward j pull the supporting arm 24 tries to swing further inward. However, -, this is limited by the detent 26. When the milk volume flow slackens again a control device (not shown) switches off the milking vacuum. The teat cups 15 are then aerated and the - milking cylinder then exerts a time-limited permanent pull on the teat cups 15, which are withdrawn from the udder. The working cylinder 28 pulls, via the cable 29, the lever 1 horizontally in the direction of the head of the cow. The dropping teat cups 15 cannot tilt downwards since they are held by the pulsation hoses 12. The weight of the teat cups causes the milk hoses 17 to bend at the nipples 10 and to some extent also at the nipple 16 so that the nipples reliably seal while the teat cups 15 assume ; an inclined position. Sloping of the nipple 10 and 16 is not required and is unsuitable. In the meantime the detent 31 has reached the loop 30 and the cable 29 pulls the supporting arm 24 with the stripping device from the region where the cow stands until the detent 32 reaches the limit switch 33 and holds it.
'
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for automatic stripping upon reaching a specific milk volume flow in the milking of a cow in a milking stall and for automatically removing teat cups of milking devices when the automatic stripping is complete, as a function of the milk volume flow by means of a working cylinder and cable attached thereto said device comprising a two armed lever pivotably mounted about a point of support, milking devices flexibly secured to one end of said lever and a stripping cylinder flexibly secured to the other end of said lever, a bearing, disposed below said point of support providing for horizontal movement of said lever, said bearing being connected to said stall by a supporting arm so as to be swingable in a circular path, said lever and said stripping cylinder being swingable about a fulcrum of said supporting arm by means of said cable on actuation of said working cylinder, said milking devices being suspended such that below said lever a universal hinge is provided with a milk collecting member suspended therefrom and an offset rigid support with a vacuum distributor attached thereto is provided above the said lever, pairs of pulsation hoses extending between said vacuum distributor and said milking devices and being of such length that they provide for lowering of the milking devices while simultaneously bending milk hoses extending between said milking devices and said milk collecting member.
2. A device according to claim 1, in which the supporting arm has a loop and the cable has a detent adapted to cooperate therewith.
3. A device according to claim 1, in which the support and the hinge are disposed on a crossbar which extends in the direction of the longitudinal axis of a cow being milked and is rigidly fastened to the lever.
4. A device according to claim 2 or 3, in which the cable is secured in the region of the lever or to the lever or to the crossbar.
5. A device according to claim 1, in which detents are provided to limit the horizontal motion and a detent is provided to limit the vertical motion of the lever.
6. A device according to claim 3, in which the milk collecting member is connected to the crossbar by the hinge and a support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA267,215A CA1069076A (en) | 1976-12-06 | 1976-12-06 | Automatic stripping and removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA267,215A CA1069076A (en) | 1976-12-06 | 1976-12-06 | Automatic stripping and removal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1069076A true CA1069076A (en) | 1980-01-01 |
Family
ID=4107439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA267,215A Expired CA1069076A (en) | 1976-12-06 | 1976-12-06 | Automatic stripping and removal device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1069076A (en) |
-
1976
- 1976-12-06 CA CA267,215A patent/CA1069076A/en not_active Expired
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