JPS6237027Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pinch valve that has a simple mechanism using a pipe in which a plurality of fluid passages are integrally formed, is easy to manufacture, and is easy to operate.

Some conventionally known pinch valves having a plurality of fluid passages each use independent tubes made of flexible material (see, for example, Japanese Utility Model Application Publication No. 87957/1987). However, in such known technology, the pinch valve that opens and closes these plurality of fluid passages has tubes arranged in series in front of each fixed member, and a movable member arranged on the opposite side of the tube, and the movable member By moving the tube with respect to the fixed member, each tube is clamped and released. However, in order to open and close each tube at the same time, the shape of the tubes, the fixed and movable members, and the positional relationship of the tubes must be arranged equally, and the quality of the tubes, the processing accuracy of each component, and the assembly work must be the same. Not only does this require great skill, but the pinch valve becomes larger due to the use of a large number of pipes, making the mechanism complex and prone to failure, and the pinch force is also doubled by the number of pipes.

Furthermore, in conventionally known pinch valves, a tube is manufactured by extrusion molding, cut to a desired length, and a fitting is attached to one end of the tube to attach the tube to the base of the pinch valve. As a result, it took a long time to assemble, and it was difficult to seal the fitting and the pipe attachment part, resulting in a lack of reliability.

The purpose of this invention is to eliminate the drawbacks of the conventionally known techniques as described above, and to provide a pinch valve that has a simple mechanism, is easy to manufacture, is inexpensive, is easy to assemble and install, and is easy to operate. That is.

To achieve this objective, the present invention proposes a pinch valve as follows: a flexible pinch valve with integral internal barriers forming multiple fluid passages: an air or gas passage and a liquid passage; A fitting portion of the tube and a connecting portion of the air or gas pipe to the air or gas passage are integrally formed at one end of the tube made of a flexible material, and the fitting portion is connected to the closed container receptacle in the valve base. attached to the body, an air or gas pipe is connected to the connection part, the plurality of fluid passages of the flexible material pipe can be pinched by suitable opening/closing means, and the barrier is , the tube made of flexible material has a length slightly below the pinched position.

Since this invention has the above-mentioned configuration, it has the following effects. That is, if a tube made of a flexible material having a plurality of fluid passages is pinched using an appropriate opening/closing means, all of the plurality of fluid passages will be completely closed, and if the tube is opened, the plurality of fluid passages will be closed. Since they are opened all at once, the inflow and outflow of the plurality of fluid passages can be performed accurately and easily with a simple mechanism. In addition, since the length of the barrier that forms the multiple fluid passages of the tube is limited to a point slightly below the pinched position, the pinching deformation is greater than if the barrier had a length equal to the length of the tube. This makes it easier to pinch the tube, so the force needed to pinch the tube can be small.

Next, an embodiment of this invention will be described based on the drawings.

In FIGS. 1 and 2, the base 1 has an open upper portion and is configured to be airtightly attached to the opening of a closed container by suitable means such as screwing.

Further, a closed container receiver 2 consisting of a saucer or the like for receiving the opening of the closed container is installed on the upper part of the base 1, and the upper end of the tube 3 made of a flexible material such as silicone rubber is attached to the receiver 2. are fixed together via a mounting portion 7 made of a collar or the like. The tube 3 is provided with a barrier 4 to form a liquid passage 5 and an air or gas passage 6. The length of the barrier 4 is set slightly below the pinched position of the pipe, and is shorter than the length of the pipe itself. Reference numeral 9 denotes an air or gas pipe communicating with the air or gas in the closed container, and a mounting portion 8 at the upper end of the pipe 3.
mounted on.

The center part of the base body 1 is a housing part for the mechanism that operates the pinch valve, and a fixed spool 10 is fixed in the base body 1 by a pin 11, and a movable spool 12 is fitted to the fixed spool 10 so as to be able to slide freely. A spring 1 is provided between the left end surface of the movable spool 12 and the collar at the left end of the fixed spool 10.
4 is intervening. Further, the fixed spool 10 is provided with a hole 15, and the movable spool 12 is provided with a long hole 16, and the tube 3 passes vertically through these holes.
Furthermore, a rod-shaped pin 17 is provided inside the fixed spool 10.
is provided across the internal space of the fixed spool 10, while a rod-shaped pin 18 is provided inside the movable spool 12 at a position that crosses the internal space of the movable spool 12 and corresponds to the pin 17, A long hole 1 is provided at a corresponding position on the fixed spool 10 to allow movement of the pin 18 by sliding of the movable spool 12.
9 is provided.

Next, the operation of this embodiment will be explained.

In FIG. 1, the movable spool 12 is pushed to the right by the elasticity of the spring 14, and the liquid passage 5 and air or gas passage 6 of the tube 3 are closed by the pins 17 and 18.

The operating end 13 of the movable spool 12 is connected to the spring 1
When the pin 18 is pressed to the left against the elastic force of the tube 3, the pin 18 moves to the left in the elongated hole 19 along with the movement of the movable spool 12, and the gap between the pins 17 and 18 increases, so that the liquid passage 6 of the tube 3 and Air or gas passage 6 is opened. Therefore, the liquid in the sealed container is transferred to the liquid passage 5.
The air or gas flows down and is taken out to the outside and at the same time replenishes the air or gas into the sealed container.
The air or gas passage 6 and then the air or gas pipe 9 ascend through the opening at the bottom and flow into the closed container.

As explained above, this invention provides a fluid passage and an air or gas passage by integrally forming a barrier inside a tube made of flexible material, so it requires fewer parts than conventional pinch valves. It has fewer parts, is smaller and lighter, is easier to manufacture, and is easier to operate because the valve only needs to be opened and closed by opening and closing a single tube. During manufacturing, a slight taper must be added to the tube in order to remove it from the mold, but since the length of the barrier is stopped slightly below the pinch point, manufacturing of the tube with the barrier is even more difficult. This has the effect of making it easier to operate, and the force required to pinch the tube is smaller than that of a barrier having the same length as the tube itself, making it extremely easy to operate.

In addition, in this device, the attachment part of the tube to the base body and the attachment part of the air or gas pipe to the tube are integrally formed at one end of the tube, which simplifies attachment and assembly. , there are fewer places where stickers are required,
It also has the effect of ensuring its sealing action.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the pinch valve according to this invention, and FIG. 2 is a longitudinal sectional view of a tube used in the pinch valve of FIG. . DESCRIPTION OF SYMBOLS 1...Base body, 3...Pipe, 4...Barrier, 5...Liquid passage, 6...Air or gas passage, 7...Mounting part, 8...Mounting part, 9...Air or gas pipe.

Claims (1)

[Scope of utility model registration request] At one end of a tube made of a flexible material, in which a plurality of fluid passages, ie, an air or gas passage and a liquid passage, are formed by integrally providing a barrier therein, a mounting part of the tube and a wall for the air or gas passage are attached. A connecting portion for an air or gas pipe is formed integrally with the connecting portion, the mounting portion is attached to a closed container receptor in the valve base, the air or gas pipe is connected to the connecting portion, and the flexible The plurality of fluid passages of the tube made of material can be pinched by suitable opening/closing means, and the barrier has a length extending slightly below the point where the tube made of flexible material is pinched. A pinch valve characterized by having: