JPH1163260A - Valve structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bag from swelling excessively by providing an operation member to make a control valve act to open a discharge port by external operation. SOLUTION: A control valve 16 disposed in an outer chamber 11 is in close contact with a discharge port 10 from the outside to close it. A control valve 16 has a shaft part 16a inserted into a communication hole 12 of an outer chamber 10 and supported. A coil spring 18 mounted on the shaft part 16a is adapted to always close the port 10. Such a control valve 16 is separated from the discharge port 10 against the spring 18 force when an internal pressure in a communication hole 8 exceeds a required level to thereby open the port 10. The hole 8 is communicated with a suction port 7 on the side of a bag 1 and also communicated with a delivery outlet 9 on the side of the bag 1. Even in either case where the pressure of air supplied from the bag 1 exceeds the required level and the pressure in the bag 1 exceeds the required level, the valve 16 can open the port 10 to discharge the air to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve structure used for supplying air or other fluid to a bag body such as an air bag to inflate the bag body.

[0002]

2. Description of the Related Art When fluid is supplied from a pump such as an air pump to a bag to expand the bag, valves are provided at these connecting portions. The conventional valve is a registered utility model 300319
As disclosed in No. 5 as a similar technique, it has a suction port connected to the atmosphere or a fluid supply source, and a discharge port for discharging a fluid into the bag body, and between these suction ports and the discharge port. In addition, a structure is provided in which a valve body for efficiently supplying a fluid to the bag body is provided while preventing the fluid from flowing back from the bag body.

[0003] In such a conventional valve, since the fluid can be supplied infinitely, there is a disadvantage that the bag is excessively inflated and ruptured due to excessive supply of the fluid. In order to prevent this, it is necessary to form the bag itself with a high-strength material or to cover the bag with a high-strength fiber cloth.

[0004]

As described above, conventionally, since it is necessary to reinforce the bag, the materials that can be used for the bag are limited, and the degree of freedom in material selection is narrowed. In addition, since the structure of the bag is complicated, there is a problem that it is expensive. Further, since the pressure of the fluid cannot be adjusted to a certain degree, there is an inconvenience that the degree of expansion cannot be adjusted to a desired degree.

The present invention has been made in view of such conventional problems, and can prevent the bag body from inflating excessively, and can easily adjust the pressure to an appropriate level. It is an object of the present invention to provide a valve structure that can perform pressure control.

[0006]

In order to achieve the above object, the invention according to claim 1 comprises an inlet through which a fluid flows, an outlet through which a fluid is sent into a bag, and an outlet through which a fluid is discharged to the outside. A main body portion formed so as to communicate with the main body portion, the suction valve being provided in the main body portion so as to be able to advance and retreat along a fluid inflow direction, and being urged in a direction to close the suction port to open and close the suction port; A control valve that constantly closes the discharge port and opens the discharge port by a pressure of a fluid equal to or higher than a predetermined pressure, and an external operation is enabled, and the control valve is operated in an opening direction of the discharge port by the external operation. And an operating member.

A second aspect of the present invention is the valve structure according to the first aspect, wherein the control valve and the operating member are formed integrally.

According to a third aspect of the present invention, there is provided the valve structure according to the first or second aspect, wherein the control valve has one of a pressure of the fluid from the suction port and a pressure of the fluid from the delivery port. To open the outlet.

[0009]

According to the first aspect of the present invention, when a pressure equal to or more than a predetermined pressure acts on the control valve from the suction port or the bag body, the control valve operates to open the discharge port, and the discharge of the fluid is stopped. Done. For this reason, unnecessary fluid is not supplied into the bag, and the bag is not ruptured due to excessive supply of the fluid. Therefore, there is no need to increase the strength of the bag, and the degree of freedom in selecting the material is increased, and the cost can be reduced.

Further, by operating the operating member, the control valve can be operated to open the discharge port. For this reason, the pressure of the fluid in the bag can be arbitrarily adjusted,
It is convenient for use.

According to the second aspect of the present invention, since the control valve and the operating member are integrated, the control valve can be directly operated by operating the operating member. Therefore, the control valve can be operated quickly, and the structure therefor is simplified.

According to the third aspect of the invention, when excessive pressure acts from the suction port, the control valve automatically operates to open the discharge port, so that excessive fluid flows into the bag. Can be prevented. On the other hand, when excessive pressure acts from the outlet, it is when more fluid than necessary is supplied to the bag, and similarly, since the control valve is automatically activated, the fluid in the bag can be discharged to the outside. The inside of the bag can be kept at an appropriate pressure.

[0013]

FIG. 1 is a sectional view of an embodiment of the present invention, in which a space between a container 1 as a pump capable of being compressed and expanded and a hose 2 from a bag (not shown) is shown. A valve 3 is provided.

The container 1 has an inflow port 4 through which a fluid such as air and liquid (hereinafter, collectively referred to as air) flows into one end (left end), and a valve at the other end (right end). 3 is a mounting port 5 for mounting.

The valve 3 includes a main body 4, and a suction valve 15 and a control valve 16 arranged in the main body 4.

The main body 4 is entirely made of synthetic resin, metal, or the like, and has a suction port 7 through which air flows into the container 1. One end of a communication hole 8 communicates with the suction port 7. The other end of the communication hole 8 communicates with a nozzle-shaped outlet 9 for sending air to the bag body by detachably attaching the hose 2.

A middle portion of the communication chamber 8 is opened, and the opening forms a discharge port 10 communicating with the suction port 7 and the delivery port 8. The main body 4 has an outlet 1
An outer chamber 11 extending outward from the zero portion is formed. The inside of the outer chamber 11 communicates with the discharge port 10 and a communication hole 12 that connects the discharge port 10 with the outside is formed.

The suction valve 15 is provided at the suction port 7 portion. The shaft portion 15a of the suction valve 15 is supported by the communication hole 8 and comes into close contact with and separates from the suction port 7, and the suction port 7 is opened and closed by these operations. The suction port 15 is urged by a spring force of a coil spring 17 attached to the shaft portion 15a so as to be in close contact with the suction port 7, and in a normal state,
The suction port 7 is closed. In this state, by supplying the compressed air from the container 1, the suction valve 15 moves along the inflow direction of the compressed air against the spring force. This movement moves the suction valve 15 away from the suction port 7. In order to move in the direction, the suction port 7 is opened.

The control valve 16 is disposed in the outer chamber 11, and closes the outlet 10 in close contact with the outlet 10 from the outside. The control valve 16 is supported by inserting its shaft portion 16 a into the communication hole 12 of the outer chamber 10. A coil spring 18 is attached to the shaft portion 16a.
Due to the spring force of the coil spring 18, the control valve 16 always keeps the discharge port 10 closed.

The control valve 16 separates from the discharge port 10 against the spring force of the coil spring 18 when the pressure inside the communication hole 8 becomes larger than necessary, and opens the discharge port 10 by this separation. . In this case, since the communication hole 8 communicates with the suction port 7 on the container 1 side and with the outlet 9 on the bag body side, when the pressure of the air supplied from the container 1 becomes larger than necessary, In any case when the pressure of the air in the bag body becomes larger than necessary, the control valve 16
Can open the discharge port 10 to discharge air to the outside.

An operating member 19 is formed integrally with the shaft 16a of the control valve 16. The operation member 19 penetrates vertically in the communication hole 8, and a penetrating end thereof is drawn out of the main body 4. The penetrating end drawn out of the main body 4 serves as an operating portion 19a. The operating portion 19a is depressed by hand to control the control valve 16a.
Can be separated from the outlet 10. By this separation, the discharge port 10 is opened, and the air can be discharged to the outside. With the structure in which the operating member 19 is integrated with the control valve 16 in this manner, the number of parts is reduced, the structure is simplified, and the operation to the operating member 19 can be directly transmitted to the control valve 16, so that the control valve 16 is It can be operated reliably.

Seal members 20, 21, and 22 such as seal rings are provided between the main body 4 and the suction valve 15, the control valve 16, and the operating member 19, respectively. Has been prevented.

Next, the operation of this embodiment will be described with reference to FIGS. FIG. 2 shows a normal abnormal state, in which the control valve 16 is closely attached to the discharge port 10 and is closed. In this state, the container 1 is compressed so that the compressed air
5, the suction valve 15 is separated from the suction port 7. As a result, as shown by the arrows, air flows through the communication holes 8 of the main body 4.
, And is supplied from the outlet 9 into the bag body to expand the bag body.

FIG. 3 shows a state in which compressed air is supplied from the container 1 at an excessive pressure. The control valve 16 automatically separates from the outlet 10 against the spring force of the coil spring 18 and Is released. The outlet 10 is a communication hole 12 of the outer chamber 11.
, It is possible to discharge air at an excessive pressure to the outside of the main body 4 as shown by an arrow. By this discharge, air is not excessively supplied into the bag body,
The bag does not expand more than necessary, and the bag can be prevented from bursting.

FIG. 4 shows a state in which excessive air is supplied into the bag body.
The discharge port 10 is automatically opened away from 0. By this opening, the air in the bag body is discharged, so that the bag body can be set to an appropriate pressure.

On the other hand, also when the operation member 19 is pushed down, the control valve 16 separates from the discharge port 10 as shown in FIG. As a result, the air in the bag can be manually and appropriately discharged, and the pressure in the bag can be adjusted to a desired pressure. For this reason, the bag can be inflated according to the user's preference, which is convenient in use.

As described above, in this embodiment, since the bag body can be prevented from being excessively expanded, the bag body is not provided with strength or a material having high strength is used, so that the degree of freedom in material selection can be improved. It can be increased and at a lower cost.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of an embodiment of a valve structure according to the present invention.

FIG. 2 is a partially broken side view showing a normal use state.

FIG. 3 is a partially broken side view showing a state in which a fluid at an excessive pressure is supplied.

FIG. 4 is a partially broken side view showing a state in which an excessive fluid is supplied to the bag body and a state in which an operation member is operated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 3 Valve 4 Main body part 7 Inlet 8 Communication hole 9 Outlet 10 Outlet 15 Inlet valve 16 Control valve 19 Operating member

Claims (3)

[Claims] 1. A main body formed so that a suction port through which a fluid flows, a discharge port through which a fluid is discharged into a bag body, and a discharge port through which a fluid is discharged to the outside are communicated with each other. A suction valve that is provided in the main body so as to be able to advance and retreat, and is urged in a direction to close the suction port to open and close the suction port; and a discharge port that constantly closes the discharge port and that is at a predetermined pressure or higher. A valve structure comprising: a control valve configured to open the discharge port; and an operating member configured to be externally operated and operating the control valve in the opening direction of the discharge port by the external operation. 2. The valve structure according to claim 1, wherein the control valve and the operating member are formed integrally. 3. The valve structure according to claim 1, wherein the control valve opens the discharge port by one of a pressure of the fluid from the suction port and a pressure of the fluid from the delivery port. A valve structure characterized in that: