JP2984590B2 - Improved teat cup liner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a teat cup liner mounted on a teat cup used in a milking apparatus.

[0002]

2. Description of the Related Art As a structure of a liner conventionally used, a cylindrical teat cup shell 1 having one end tapered and having a hole in the center as shown in FIG. Consists of liner 2,
The liner 2 is configured to be spaced apart from the inner wall of the shell 1 by a predetermined distance, and the fitting groove 3 provided in the liner 2 is fitted to the hole, and the upper opening of the shell 1 is closed by the band-shaped ring 4 of the liner 2. Such a configuration is known. In such a teat cup, milk is supplied from the cow's udder by supplying the vacuum pressure inside the liner and intermittently supplying the vacuum pressure and the atmospheric pressure alternately to the sealed outer chamber partitioned by the liner outer wall and the shell inner wall. Was like that.

[0003]

However, in the case of the liner having such a conventional structure, when the vacuum pressure is supplied to the outer chamber partitioned by the liner and the inner wall of the shell, the liner spreads, and the liner and the nipple adhere to each other. However, there is an inconvenience that the degree of creeping decreases and creeping-up (a phenomenon in which the contact surface vibrates and slips due to the entry of air) occurs. In addition, when the degree of adhesion between the nipple and the liner is reduced, the sealing property of the liner is deteriorated, and the atmospheric pressure enters the liner, which further deteriorates the adhesion to the nipple, causing slip or dropping of the teat cup. .
Accordingly, an object of the present invention is to prevent the creeping-up phenomenon and the fall of the teat cup by improving the sealing performance of the liner.

[0004]

That is, the present invention comprises an elastic material such as rubber having a trumpet-shaped insertion opening for inserting a teat of a dairy cow at one end and a connection opening to a milk claw at the other end. In a liner formed of a tubular body and provided with a fitting groove for fitting the lower end of the teat cup shell on the outer periphery of an intermediate portion thereof, the wall above the fitting groove of the liner has a double structure, It is an improved teat cup liner that divides the space with a structural wall. The invention of claim 2 is an improved teat cup liner in which the liner wall corresponding to the upper half of the teat cup shell has a double structure.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. In FIG. 1, reference numeral 2 denotes a connection port 5 for a milk claw at the bottom, a trumpet-shaped insertion port 6 at the top, and a hole 7 provided below the teat cup shell 1 at an intermediate portion thereof. It is a tubular teat cup liner having a fitting groove 8. Bugle-shaped insertion opening 6
Is a base 6a provided so as to extend the end of the tubular liner in a tapered shape, and a base 6a extending from an outer peripheral edge of the base 6a.
Is composed of a skirt portion 6b continuously connected in a substantially vertical direction at a predetermined distance, and an internal flange portion 6c configured to narrow an opening from the outer periphery of the distal end of the base portion 6a. The base portion 6a and the skirt portion 6b Between the teat cup shell 1
Of the fitting groove. In the present embodiment, the wall of the liner 2 is double-walled by the inner wall 2a and the outer wall 2b from the base 6a forming the trumpet-shaped fitting hole 6 toward the fitting groove 8. The area where the wall of this liner 2 is doubled,
It is approximately half the distance from the base 6a to the fitting groove 8 of the liner 2, and is an area corresponding to the upper half of the teat cup shell 1. A so-called atmospheric pressure is injected into the space 10 defined by the inner wall 2a and the outer wall 2b, and the space 10 expands when a vacuum pressure is supplied to the outer chamber between the liner and the shell, and expands when the atmospheric pressure is supplied. It is configured to wither.

As shown in FIG. 3, a method for producing such a double liner wall structure is as follows: an inner wall 2a, a trumpet-shaped insertion portion, and a base portion 6a forming the trumpet-shaped insertion port, to an outer wall 2b.
After integrally molding the portion corresponding to the above with the inner wall 2a being separated from the inner wall 2a, the outer peripheral edge of the outer wall 2b is joined to the inner wall 2a by an adhesive or the like, or a teat cup liner is manufactured by a conventional method. After that, there is a method in which a cylindrical outer wall member is brought into contact with the inner wall 2a, and then both upper and lower peripheral edges are joined to the inner wall 2a.

In the liner according to the embodiment of the present invention having the configuration described above, after the liner is inserted into the hole of the teat cup shell 1, the fitting groove 8 of the liner 2 is inserted into the hole provided below the teat cup shell 1. By fitting the base 6a forming the trumpet-shaped fitting insertion opening 6 to the periphery of the upper opening of the teat cup shell 1, it becomes a teat cup liner, and the lower connection port of the liner is connected to the milk claw. The milking preparation is completed by connecting the pulsator tube to the pulsator connection port of the cup shell. Then, the fitting opening 6 of the teat cup liner 2 is applied to the teat of the cow body to perform milking. Then, atmospheric pressure and vacuum pressure are alternately supplied from the pulsator to the inside of the teat cup shell 1 (outer liner) at predetermined intervals, and the vacuum pressure is supplied to the inner liner from milk claw. As shown in FIG. 2, when the vacuum pressure is supplied to the inside of the shell 1, the lower part of the liner 2 is open,
When atmospheric pressure is supplied into the shell 1, the liner 2
Is closed.

Further, in the milk liner of the present embodiment, the upper wall of the liner is constituted by a double structure of an inner wall and an outer wall,
Since the space 10 partitioned by the wall is set to the atmospheric pressure, FIG.
As shown in the upper part of (a) and (b), when vacuum pressure is supplied to the inside of the shell 1, the space 10 expands due to the vacuum pressure being supplied to both the inner and outer chambers of the liner. Since the liner is in close contact with the nipple, the sealability of the liner is good. When the atmospheric pressure is supplied to the liner outer chamber (inside the shell), the space 10 returns to the normal state because the pressure of the liner outer chamber and the space are equal at the atmospheric pressure. As a result, since the wall is made of a material having a thickness twice that of the lower part of the milk liner, the liner in such a part does not close the inner chamber, and is in a state in which it is softly adhered to the nipple. Become.

[0009]

As described above, in the milk liner according to the present invention, the wall of the liner which contacts the nipple has a double structure of the inner wall and the outer wall and the space is formed as compared with the conventional one. Since the nipple is softly adhered with an appropriate pressure without being excessively tightened, it is possible to prevent the cow from feeling uncomfortable and prevent the creeping-up phenomenon and the inflow of air into the inner chamber. Further, since the liner wall has a double structure and the space is filled with air at atmospheric pressure, the air layer substantially uniformly adheres to the nipple to act as a cushion with respect to tightening to the nipple. It becomes possible. Further, since the space expands and contracts due to the supply of the vacuum pressure and the atmospheric pressure to the outer chamber, a moderate stimulus like a massage can be given to the nipple, and an increase in milking amount can be expected.

[Brief description of the drawings]

FIG. 1 is a front vertical sectional view of a liner according to the present invention.

FIG. 2 With the liner attached to the shell,
It is a longitudinal cross-sectional view which shows the mode at the time of supplying vacuum pressure or atmospheric pressure in a shell.

FIG. 3 is a partial longitudinal sectional view showing one method for making a liner wall into a double structure.

FIG. 4 is a longitudinal sectional view showing a liner according to a conventional technique, wherein (a) shows a state in which vacuum pressure is supplied to an outer chamber, and (b) shows a state in which atmospheric pressure is supplied to the outer chamber.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 teat cup shell 2 teat cup liner 3 fitting groove 4 belt-like link 5 connection port 6 trumpet-like fitting insertion port 6a base 6b skirt 6c flange 7 hole 8 fitting groove 10 space

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 1-167155 (JP, U) JP-A 60-1266 (JP, U) JP-A 55-166476 (JP, U) JP-A 57- 187055 (JP, U) Japanese Utility Model Showa 56-37862 (JP, U) Japanese Utility Model Showa 55-139659 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01J 5/00-5 / 16

Claims (3)

(57) [Claims] 1. A tubular body made of an elastic material such as rubber and having a trumpet-shaped insertion opening for inserting a teat of a dairy cow at one end and a connection opening to a milk claw at the other end. In the liner provided with a fitting groove for fitting with the lower end portion of the teat cup shell, a wall above the fitting groove of the liner has a double structure, and the space is defined by the wall of the double structure. An improved teat cup liner characterized by: 2. The improved teat cup liner according to claim 1, wherein the liner wall corresponding to the upper half of the teat cup shell has a double structure. 3. The improved teat cup liner according to claim 1, wherein atmospheric pressure is supplied to said partitioned space.