JPH09121707A - Improved-type teat cup liner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject liner capable of preventing a teat cup from a creeping up phenomenon and its falling down by forming a wall upper than a fitting groove of the teat cup liner a double wall structure and dividing a space by the double wall. SOLUTION: This improved-type teat cup liner is to install a fitting groove in the middle part of a teat cup liner 2 having a connecting port to a milk claw in its lower direction and a trumpet-shaped fitting insertion port 6 in its upper direction, fitting the groove with a hole 7 in the lower direction of a teat cup shell 1, constructing the wall of the liner 2 as double walls from its base part 6 toward the fitting groove, and dividing a space 10 with the wall having a double structure. The space 10 is kept at an atmospheric pressure so as to expand for making a better sealing property of the liner on providing a vacuum to an outer room between the liner 2 and the shell 1.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art As a conventional liner structure, as shown in FIG. 4, a cylindrical teat cup shell 1 having one end tapered and having a hole at the center, and the teat cup shell 1 are inserted into the teat cup shell 1. It consists of liner 2 and
The liner 2 is configured to be separated from the inner wall of the shell 1 by a predetermined distance, the fitting groove 3 provided in the liner 2 is fitted into the hole, and the upper opening of the shell 1 is closed by the band-shaped ring 4 of the liner 2. It is known that it is configured as. In such a teat cup, the vacuum pressure inside the liner is supplied, and the vacuum chamber and the atmospheric pressure are intermittently alternately supplied to the outer chamber partitioned by the outer wall of the liner and the inner wall of the shell to be milked from the cow's udder. Was doing.

[0003]

However, in the case of a liner having such a conventional structure, when a vacuum pressure is supplied to the outer chamber partitioned by the liner and the inner wall of the shell, the liner expands and the liner and the teat are brought into close contact with each other. However, there is an inconvenience that the degree decreases and creeping up (a phenomenon in which the contact surface vibrates and slides up due to the entry of air) occurs. In addition, when the adhesion between the teat and the liner decreases, the sealability of the liner deteriorates, and the atmospheric pressure enters the liner, which further deteriorates the adhesion to the teat and causes slipping or dropping of the teat cup. .
Therefore, it is an object of the present invention to prevent the creeping-up phenomenon and the fall of the teat cup by improving the sealing property of the liner.

[0004]

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

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the illustrated embodiments. In FIG. 1, reference numeral 2 has a connection port 5 with a milk claw at the bottom, a trumpet-shaped insertion port 6 at the top, and a hole 7 provided at the bottom of the teat cup shell 1 in the middle thereof for fitting. It is a tubular teat cup liner having a fitting groove 8. Trumpet-shaped insertion opening 6
Is a base portion 6a continuously provided so as to expand the end portion of the tubular liner in a tapered shape, and a base portion 6a from the outer peripheral edge of the base portion 6a.
Is composed of a skirt portion 6b that is continuously provided in a substantially vertical direction at a predetermined distance, and an internal flange portion 6c that is configured to narrow the 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
It is used as a fitting groove. In this embodiment, the wall of the liner 2 is composed of an inner wall 2a and an outer wall 2b from the base portion 6a forming the trumpet-shaped insertion opening 6 toward the fitting groove 8. The area where the wall surface of this liner 2 is double,
The distance is approximately half the distance from the base portion 6a to the fitting groove 8 of the liner 2, and corresponds to the upper half of the teat cup shell 1. Further, so-called atmospheric pressure is injected into the space 10 defined by the inner wall 2a and the outer wall 2b, and it expands when a vacuum pressure is supplied to the outer chamber between the liner and the shell, and when the atmospheric pressure is supplied. It is configured to deflate.

As shown in FIG. 3, a method of manufacturing such a double wall structure of the liner includes an inner wall 2a, a trumpet-shaped insertion portion, and a base portion 6a forming the trumpet-shaped insertion opening to an outer wall 2b.
The part corresponding to the above is integrally molded in a state of being separated from the inner wall 2a, and then the teat cup liner is manufactured by a method in which the peripheral edge of the outer wall 2b is joined to the inner wall 2a with an adhesive or the like or a conventional method. Then, there is a method in which the tubular outer wall member is brought into contact with the inner wall 2a, and then both upper and lower peripheral edge portions are joined to the inner wall 2a.

In the liner according to the embodiment of the present invention having the above-described structure, 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. A teat cup liner is formed by fitting the base portion 6a that fits and forms the trumpet-shaped insertion opening 6 to the upper opening peripheral edge of the teat cup shell 1, and the lower connection opening of the liner is connected to the milk claw. Preparation of milking is completed by connecting the pulsator tube to the pulsator connection port of the cup shell. Then, the insertion opening 6 of the teat cup liner 2 is applied to the teat of the cow body to perform milking. Then, the atmospheric pressure and the vacuum pressure are alternately supplied from the pulsator into the teat cup shell 1 (outer liner chamber) at predetermined intervals, and the vacuum pressure is supplied from the milk claw to the liner inner chamber. As shown in 2, when the vacuum pressure is supplied to the shell 1, the lower part of the liner 2 is open,
When the atmospheric pressure is supplied to the shell 1, the liner 2
Is closed.

Further, in the milk liner of the present embodiment, the upper wall of the liner has a double structure of an inner wall and an outer wall,
Since the space 10 defined by the wall is at atmospheric pressure,
As shown in the upper part of (a) and (b), when the vacuum pressure is supplied to the shell 1, the space 10 swells because the vacuum pressure is supplied to both the inner chamber and the outer chamber of the liner. , The liner adheres well to the teat, so the liner has good sealing properties. When the atmospheric pressure is supplied to the outer liner chamber (inside the shell), the space 10 returns to a normal state because the liner outer chamber and the space have the same atmospheric pressure. As a result, since the wall is made twice as thick as the lower part of the milk liner, the liner in such a part does not close the inner chamber, and the state that the liner is softly adhered to the nipple. Become.

[0009]

As described above, in the milk liner according to the present invention, as compared with the conventional milk liner, the wall of the liner that abuts against the teat has a double structure of an inner wall and an outer wall and forms the space. Since the teat is softly adhered with an appropriate pressure without being excessively tightened, the cow is not uncomfortable, and the creeping up phenomenon and the inflow of air into the inner chamber can be prevented. Furthermore, since the liner wall has a double structure and its space is filled with atmospheric pressure air, the air layer closely adheres to the teat in a substantially even manner so as to act as a cushion for tightening on the teat. It becomes possible. Further, since the space swells or swells due to the supply of the vacuum pressure and the atmospheric pressure to the outer chamber, it is possible to give a moderate massage-like stimulus to the teat, and an increase in the 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 shows a state where the liner is attached to the shell,
It is a longitudinal cross-sectional view showing a state in the case where a vacuum pressure or an atmospheric pressure is supplied into the shell.

FIG. 3 is a partial vertical cross-sectional view showing one method for making the wall of the liner have a double structure.

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

[Explanation of symbols]

 1 Teat Cup Shell 2 Teat Cup Liner 3 Fitting Groove 4 Belt Link 5 Connection Port 6 Trumpet-like Fitting Insertion 6a Base 6b Skirt 6c Flange 7 Hole 8 Fitting Groove 10 Space

Claims (3)

[Claims] 1. A tubular body made of 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 for a milk claw at the other end, and an outer periphery of an intermediate portion thereof. In a liner having a fitting groove for fitting with the lower end of the teat cup shell, the wall above the fitting groove of the liner has a double structure, and a space is defined by the wall of the double structure. An improved teat cup liner featuring. 2. The improved teat cup liner according to claim 1, wherein the wall of the liner 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 the partitioned space.