JPS6263272A - Valve device - Google Patents

Abstract

PURPOSE:To enable to perform reliable sealing even if a contact position between a valve body and a valve seat is displaced and to completely prevent slight leak of liquid during closing of a valve, by a method wherein the material of the valve of an electromagnetic valve used in an automat, e.g., cup vender, is an elastomer material and a synthetic resin material. CONSTITUTION:A valve seat 8 of the open edge of a valve port 3 of an electromagnetic valve is moulded out of an elastomer material, e.g., a rubber material, so that the valve seat can make surface contact with a valve body 6 even if local permanent deformation is produced. The valve body 6 on the valve seat 8, formed integrally with a plunger 5, is formed using a rigid plastic material.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a valve device, and in particular to a valve that prevents minute leakage and stabilizes the quality of a small electromagnetic valve used in a beverage circuit such as a cup bender. Regarding equipment.

[Prior art and its problems]

Generally, vending machines such as cup vendors use electromagnetic valves to cut off the flow of liquid, and this electromagnetic valve opens and closes a valve port formed in the valve housing with a valve body directly connected to a plunger. It has become. FIG. 2 shows this type of conventional valve device, in which liquid flows into a valve housing 1 made of metal or hard plastic through an inlet channel 2 and flows through a valve port 3 to an outlet channel 4. 3 is opened and closed by a rubber valve body 6 directly connected to a plunger 5.

A spring force of a spring 7 acts downwardly on the valve body 6 when the valve is closed, and the valve body 6 is pressed against the valve seat 8 by this spring force. Furthermore, when the coil 9 is energized, the plunger 5 is sucked upward to open the space between the valve body 6 and the valve seat 8, and the liquid from the inlet channel 2 flows through the valve port 3 to the outlet channel 4.

However, the valve body 6 undergoes permanent deformation 10 at the contact portion with the valve seat 8 during long-term use.

As long as the contact position between the valve body 6 and the valve seat 8 is repeated every time, even if the valve body 6 undergoes some permanent deformation 10, it will not affect the sealing. 6 rotates slightly, the relative positions of the valve body 6 and the valve seat 8 shift, and the permanently deformed part and the non-permanently deformed part come into contact, and the valve seat 8 is already permanently deformed. There was a problem that a small amount of liquid leaked from parts that did not come into contact with the product.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional valve device, and to ensure the sealing between the valve body and the valve seat when the valve is closed, even if the contact position between the valve body and the valve seat is shifted. It is an object of the present invention to provide a valve device that enables the above-mentioned operation.

[Key points of the invention]

In order to achieve the above object, the present invention provides a valve device in which a valve bow 1 is formed between an inlet flow path and an outlet flow path in a housing, and the valve port is opened and closed by a valve body. The valve seat at the opening edge of the valve is made of an elastomer material, while the valve body is made of a hard plastic material, so that relative misalignment occurs between the valve body and the valve seat. Even when the valve is closed, the valve body and the valve seat can be reliably sealed.

[Embodiments of the invention]

Hereinafter, one embodiment of a valve device according to the present invention will be described with reference to FIG. 1, in which the same parts as in FIG. 2 are denoted by the same reference numerals. In FIG. 1, the symbol l designates a valve housing, and this valve housing 1 has an inlet passage 2 and an outlet passage 4 along a common passage axis, and outside of these passages there are pipe connections. Male threads 2a and 4a are formed. A valve port 3 is formed between the inlet flow path 2 and the outlet flow path 4, and a valve seat 8 is formed around the periphery of the valve port 3. According to the invention, this valve seat 8 is made of an elastomeric material, for example a rubber material. Further, the valve port 3 described in -H is opened and closed by a valve body 6 integrated with the plunger 5. This valve body 6 is made of a hard plastic material and is adapted to come into close contact with a rubber valve seat 8. The plunger 5 is accommodated in the inner hole 11a of the cover case 11 so as to be movable in the axial direction. A spring 7 is incorporated in the end of the plunger 5, and the spring force of the spring 7 presses the valve body 6 downward. The flange 12 of the cover case 11 is fixed to the valve housing 1 by a retainer ring 13.

Further, an excitation coil 9 is provided on the outside of the cover case 11, and when the excitation coil 9 is excited, the plunger 5 is pulled up and the valve body 6 is opened to form a gap between it and the valve seat 8.

According to the invention, as mentioned above, the valve seat 8 is constructed of an elastomeric material, while the valve housing 1 is constructed of a hard plastic material.

In the valve device configured as described above, when the valve is closed, the excitation coil 9 is demagnetized as shown in the first part, so the plunger 5 is pushed down by the spring force of the spring 7, and the valve body 6 is made of elastomer material. The valve seat 6 is tightly abutted from above to close the valve port 3. On the other hand, when the valve is closed, the excitation coil 9 is energized and the plunger 5 is pulled upward, causing the valve body 6 to rise upward and form a gap between it and the valve seat 8, allowing the liquid from the inlet flow path 2 to flow upward. It can be led through the valve port 3 to the outlet flow path 4 . In the present invention, the valve seat 8 is made of an elastomer material and is in surface contact with the valve body 6 made of a hard plastic material. Close engagement can be achieved between the valve body and the valve seat regardless of the position.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a valve seat made of an elastomer material is provided around the periphery of a valve port formed on the valve housing side, and a valve body made of hard plastic is brought into contact with this valve seat. Even if there is a relative positional shift between the valve seat and the valve body, the valve body and the valve seat can be reliably sealed when the valve is closed. It is possible to completely prevent minute leakage of.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of the position of a valve device, and FIG. 2 is a vertical cross-sectional view showing a conventional valve device. 1... Valve housing, 2... Inlet flow path, 3...
・Valve port, 4...Outlet flow path, 5...Plunger, 6...Valve body, 8...Valve seat

Claims (1)

[Scope of Claims] 1) In a valve device in which a valve port is formed between an inlet flow path and an outlet flow path in a valve housing, and the valve port is opened and closed by a valve body, the opening of the valve port is A valve device characterized in that the valve seat on the edge is made of an elastomer material, while the valve body is made of a hard plastic material. 2) The valve device according to claim 1, wherein the valve housing is made of a hard plastic material, and the valve seat is made of a rubber material.