JPH05958Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an intermittent air buzzer that sounds when air is intermittently supplied.

[Conventional technology]

Conventionally, when making an air buzzer sound intermittently, an electric circuit that periodically generates an intermittent signal is used to switch and control an air valve, thereby intermittently supplying air to the air buzzer. In addition, an air timer may be used.

[The problem that the idea attempts to solve]

However, the use of such an accessory circuit requires corresponding components.

The object of the present invention is to provide an intermittent air buzzer that can be easily configured in a factory or the like.

[Means to solve the problem]

In order to achieve this object, the present invention uses a return-to-home type air directional control valve 5 that performs a switching operation in response to control air pressure to transfer compressed air supplied from a compressed air source to a throttle valve 6 in its original position. supply to the entrance of
During the switching operation, compressed air is supplied to the air buzzer main body 4, the inlet side of the throttle valve 6 is opened to the atmosphere, and a hose 8 of a predetermined length is connected to the outlet of the throttle valve 6 to send control air pressure to the air direction control valve 5. A check valve 7 is provided between the hose and the inlet side of the throttle valve 6 to allow compressed air in the hose 8 to flow to the inlet side.

[Effect]

In the original position of the directional control valve 5, the compressed air is delayed by the throttle valve 6 and is supplied to the hose 8 functioning as a compressed air tank, while the air buzzer body 4 is at rest. After a predetermined period of time corresponding to the amount of restriction and the volume of the hose 8 has passed, the internal pressure reaches a level that is effective as control air pressure, the directional control valve 5 performs a switching operation, the air buzzer body 4 starts sounding, and the restriction is activated. Exhaust the inlet side of valve 6,
Compressed air in a hose 8 is quickly exhausted through a check valve 7. Therefore, when the internal pressure of the hose 8 reaches a level lower than the force that returns the directional control valve 5 to its original position, the directional control valve 5 returns to its original position, stops ringing, and then passes through the throttle valve 6 again. Compressed air is supplied into the hose 8.

[Example of idea]

The figure shows an intermittent air buzzer according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a two-way control valve that returns to its original position and is supplied with compressed air used for work in a factory from a compressed air source. 2 is a manually operated two-way control valve that is operated by a button 2a to supply control air pressure to the two-way control valve 1 when the buzzer sounds. When the button 2a is pressed to the dotted line position shown in the figure, compressed air is supplied to the two-way control valve 1 as control air pressure, and when the button 2a is pressed again, it returns to the original position and stops supplying the control air pressure.

5 is a return-to-home type four-way control valve that is switched and controlled by control air pressure in order to intermittently supply compressed air to the air buzzer main body 4. Reference numeral 6 denotes an adjustable throttle valve, the inlet of which is connected to one outlet of the four-way control valve 5, and communicates with one inlet of the four-way control valve 5, which is supplied with compressed air in situ. . A check valve 7 in the direction shown is connected in parallel to the throttle valve 6 . On the other hand, the air buzzer main body 4 is connected to the other outlet of the four-way control valve 5, and communicates with the other inlet of the four-way control valve 5, which is open to the atmosphere in the original position.

One end of a hose 8 whose length is adjusted according to the ringing time is connected to the outlet of the throttle valve 6 to function as an air tank, and the other end is connected to the control air pressure port of the four-way control valve 5. ing.

The operation of the intermittent air buzzer configured as described above is as follows.

In a factory, for example, if you want to notify danger with an air buzzer, press button 2 of the two-way control valve 2 for operation.
When a is pressed, the two-way control valve 1 is switched and compressed air is supplied to the four-way control valve 5. This results in
In its original position, compressed air is supplied to the hose 8 through the throttle valve 6, and the amount of throttle and hose 8
The air buzzer body 4 is closed for a period of time corresponding to the volume of
is on hiatus.

When the internal pressure of the hose 8 reaches the required control air pressure of the four-way control valve 5 and the switching operation is performed, the supply of compressed air to the air buzzer main body 4 starts and sounds, and the inlet side of the throttle valve 6 closes. The four-way control valve 5 is switched to the exhaust inlet to the atmosphere. As a result, the compressed air in the hose 8 is quickly exhausted through the check valve 7. Therefore, when the time elapses until the internal pressure of the hose 8 falls below the value that causes the four-way control valve 5 to return to its original position, the four-way control valve 5 returns to its original position and the hose is passed through the throttle valve 6 again. 8
Compressed air is supplied inside.

That is, the sounding time of the air buzzer main body 4 can be adjusted by the length of the hose 8, and the rest time is defined by the volume and the amount of throttle of the throttle valve 6. For example, if the inner diameter of the hose 8 is 4 mm, the length is 200 mm, and the throttle amount of the throttle valve 6 is set, a ringing time of about 0.4 seconds can be obtained.

In the above-mentioned embodiment, the check valve 7 does not have to be directly connected to the inlet and outlet of the throttle valve 6, but is connected between the control air pressure port on the four-way control valve 5 side and the outlet for communicating with the atmosphere of that valve. You may do so.

[Effect of idea]

As described above, according to the present invention, it is possible to easily make the air buzzer sound intermittently using a normal air circuit element. Furthermore, it is easy to adjust the ringing and rest periods.

[Brief explanation of drawings]

The figure is a diagram showing a circuit configuration of an intermittent air buzzer according to an embodiment of the present invention. 4...Air buzzer body, 5...4-way control valve,
6... Throttle valve, 7... Check valve, 8... Hose.

Claims (1)

[Scope of Claim for Utility Model Registration] A return-to-home type air directional control valve that performs a switching operation in response to control air pressure supplies compressed air supplied from a compressed air source to the inlet of a throttle valve in its original position, During the switching operation, the compressed air is supplied to the air buzzer main body, and the inlet side is opened to the atmosphere, and a hose of a predetermined length is connected to the outlet of the throttle valve to send the control air pressure to the directional control valve. An intermittent air buzzer characterized in that a check valve is provided between a hose and the inlet side to allow the compressed air in the hose to flow to the inlet side.