JPH0725019Y2 - Milking machine teat cup liner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a teat cup liner of a milking machine.

2. Description of the Related Art A conventional vacuum milking machine, as shown in FIGS. 4 and 5, has a mouthpiece 51 that can be hermetically fitted to a teat 100 of a cow and a milk claw 6.
A teat cup liner 50 made of a rubber tubular body having a connection port 52 to the nipple 70 side of FIG. 5 and a peripheral edge 53 of a suction port portion 51 of the teat cup liner 50 are integrally hung vertically. The skirt portion 51a is fitted in the upper opening 61 in an airtight manner, and the fitting groove 54 provided in the vicinity of the center of the teat cup liner 50 is fitted in the lower end curved portion 62 in an airtight manner. The four teat cups 69 constituted by the teat cup shell 60 are fitted to the cow's teat by vacuum pressure, and the pulsating vacuum pressure is introduced from the pulsator 67 into the pulsation chamber 64 via the inlet 63 for milking. . 72 is a milk transportation tube, 68 is a pulsating vacuum supply tube, 73 and 74 are vacuum lines arranged in the barn, respectively, and 76 and 75 are vacuum outlets from the vacuum line, respectively. is there.

Such a milking machine is thoroughly cleaned and disinfected after the milking work is completed to prepare for the next milking. Wash the milking machine as shown in FIG.
Four washer cups 31 that can be fitted airtightly on the peripheral edge 53 of the suction port 51 of 9, ...
Four branch pipes 32, ...
Is performed by a teat cup washer composed of a flow divider 33 connecting the branch pipes 32, ... To the cleaning liquid conduit 34.
That is, the suction port peripheral edge 53 of the teat cup is airtightly fitted into the washer cup 31 that opens upward, so that the vacuum in the teat cup liner causes the teat to pass from the cleaning liquid conduit 34 whose one end is connected to the cleaning liquid tank. The cleaning liquid vigorously flows into the cup lip for cleaning. Therefore, for proper cleaning,
It is an essential requirement that the suction cup peripheral edge 53 of the teat cup liner and the washer cup be fitted in an airtight manner.
In general, the teat cup is often left in the washer cup 31 as it is after being cleaned. This is convenient because it reduces the possibility of the cleaning surface being contaminated by bacteria and the like.

By the way, the teat cup liner is a molded rubber product, and generally has poor dimensional accuracy. In addition, since it is deteriorated by ultraviolet rays, a cleaning liquid, etc., and its elasticity is gradually lost, the airtightness with the washer cup 31 tends to be impaired. Further, as is clear from FIG. 5, the teat cup is biased in a biased direction by a thick and heavy milk transport tube that can withstand high vacuum such as 300 to 400 mmHg and a pulsating vacuum supply tube. Therefore, it is extremely difficult to maintain the ideal fitting state in which the central axis of the washer cup and the central axis of the teat cup are in a straight line, and it is extremely difficult to fit the washer cup to the teat cup. In many cases, the tip end is fitted in a slightly inclined state, and the outer peripheral surface has a gentle curved surface or a cylindrical surface.
And the inner peripheral surface of the washer cup 31 is impaired in cleaning performance, or cleaning is not sufficiently performed, or only one of the four teat cups is hardly cleaned and cleaned again. There were troubles such as having to repeat the operation. Further, as described above, the washer cup is left as it is after washing as a storage place for the teat cup, as it is,
Such cleaning mistakes were easily overlooked, which could lead to a serious accident.

Configuration of the Invention The present invention has been made in response to such a situation, and its gist is a tubular body made of a rubber elastic material having a trumpet-shaped mouth portion which is fitted to the teat of a dairy cow at the upper end. And a lip portion that extends concentrically from the upper end of the periphery of the mouth end portion toward the central axis of the tubular body, and that can be in close contact with the teat of a dairy cow, and surrounds the tubular body from the periphery of the mouth end portion. Thus, in a teat cup liner of a milking machine having a skirt portion integrally hung, in the suction mouth portion, an outer peripheral surface of the suction mouth portion peripheral edge has a maximum diameter in the peripheral edge and the skirt portion, and A milking machine characterized in that an annular projecting ridge having a substantially chevron cross section is provided around the inner surface of a washer cup communicating with the cleaning solution tank via a cleaning solution conduit. The teat On the cup liner. Hereinafter, examples will be described in detail.

FIG. 1 is a cross-sectional view of a teat cup liner showing an embodiment of the present invention, which has a trumpet-shaped mouth 2 at the upper end and a connection port 1a for connecting the milk claw 65 to the nipple 70 at the lower end. The rubber tubular body 1 has a teat cup liner. A lip portion 5 is provided so as to extend concentrically from the upper end of the peripheral edge 3 of the mouthpiece portion 2 in the central axis direction of the tubular body 1, so that when the teat cup is fitted to the teat, it closely contacts the teat base. , Its extension width and thickness are specified.
On the other hand, the skirt portion 4 is integrally hung from the lower portion of the peripheral edge 3 so as to surround the lower portion of the inlet portion 2 in a state of being inclined slightly in the axial direction inward from the peripheral edge 3 of the inlet portion. 9
Is a fitting groove into which the lower end of the teat cup shell fits,
Along with the skirt portion 4 that fits over the upper end opening of the teat cup, the pulsation chamber 64 is provided near the pulsation wall 6 of the teat cup liner.
Is for forming. An annular protrusion 5 is provided around the outer peripheral surface of the suction port peripheral edge 3 of the teat cup liner 10. The ridge 5 bulges out in the shape of a sharp mountain in the radial direction, and bulges out, and the outer peripheral surface 3a of the suction port peripheral edge 3 and the skirt 4
The outer diameter of the outer peripheral surface (including the case where it is fitted into the teat cup shell 60 as shown in FIG. 3) is projected to the side more than any part, and the maximum diameter is formed on these outer peripheral surfaces. It is provided. In the above example,
Although the ridge is shown as being provided at only one place, it may be provided at a plurality of places.

Effect When the teat cup liner according to the present invention is mounted on the teat cup shell 60 and fitted into the washer cup 31, the top portion of the projecting ridge 5 having a sharp chevron cross section,
As shown in FIG. 3, since the ridge 5 is substantially in line contact with the inner peripheral surface of the washer cup 31, the ridge 5 is strongly pressed by the inner peripheral surface of the washer cup 31, so that the ridge 5 itself. Is deformed and flattened, and it tends to be depressed at the periphery of the mouthpiece, and acts to reduce the diameter of the mouthpiece.As a result, the restoring force due to the rubber elasticity of the mouthpiece that forms the rubber ring body is thin. Concentrate on the to form a strong seal. Even if the teat cup is tilted, the close contact between the inner peripheral surface of the washer cup and the ridge is impaired by the synergistic effect of the expansion and contraction of the ridge itself and the rubber elasticity of the periphery of the mouthpiece forming the rubber ring. There is no. Thus, due to the imperfect seal, only one of the four teat cups was incompletely washed, and as a result, this was inadvertently overlooked, resulting in contamination of milk in milk or transmission of disease. There is no fear of accidents such as accidents.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention. Second
FIG. 3 and FIG. 3 are explanatory views showing the usage state in the cleaning work of the embodiment of FIG. FIG. 4 is an explanatory diagram showing an example of a conventional technique. FIG. 5 is an explanatory diagram showing an example of a vacuum milking machine.

Claims (1)

[Scope of utility model registration request] 1. A tubular body made of a rubber elastic material having a trumpet-shaped mouthpiece fitted to a teat of a dairy cow at an upper end thereof, and the mouthpiece has a peripheral edge upper end directed toward a central axis of the tubular body. In a teat cup liner of a milking machine, which extends concentrically and has a lip portion that can be brought into close contact with a teat of a dairy cow, and a skirt portion that is integrally hung so as to surround the tubular body from the mouthpiece peripheral edge, On the outer peripheral surface of the mouthpiece peripheral edge, the peripheral edge and the skirt portion have a maximum diameter,
Further, a milking method characterized in that an annular projecting ridge having a substantially mountain-like shape with a sharp cross-section is provided around the inner surface of the washer cup communicating with the cleaning solution tank via the cleaning solution conduit. Machine teat cup liner.