JPH03215707A - Air supply device for air micrometer - Google Patents

Abstract

PURPOSE:To reduce air consumption and reduce the cost without increasing the load on an operator by providing an opening/closing part for the three port-two position valve of an air micronozzle to a storage jig where the air micronozzle is placed. CONSTITUTION:When the air micronozzle 4 is lifted to perform measuring operation, the air blowout port 9 of the storage jig 8 is opened to make air flow and the pressure drops, so the three port-two position valve 2 is opened to send air required for the measurement to the air micronozzle 4, thereby performing the measuring operation. When the air micronozzle 4 is placed on the storage jig 8 after the measurement, the air blowout port 9 is closed and the pressure rises, so that the three port-two position valve 2 is closed. Consequently, the air which enables the measurement is stopped from being sent to the air micronozzle 4. The three port-two position valve 2, however, is closed as well and fine air is sent from a speed controller 7 to a meter display body 3 to prevent a float pointer from touching the bottom, so that following measuring operation is performed immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air supply device for an air micrometer that measures the inner diameter of a cylinder based on the amount of air leakage.

[Conventional technology]

An air micrometer is an air micro nozzle with an air outlet provided on the circumference of the cylinder, which is inserted into a cylinder, etc., and the amount of air leaking from between the cylinder and the inner wall of the cylinder is displayed on the meter display. It is designed to measure accurately.

During measurement work, air is constantly being blown out from the air micro nozzle, and air is continuously being sent from the compressor. There is also a device in which a lever for an on-off valve is provided on the grip of the air micro nozzle, so that when the nozzle is grasped and lifted, the lever on the on-off valve is squeezed and air is sent to the air micro nozzle. For example, see Japanese Utility Model Application No. 57-147712.

[Problem to be solved by the invention]

If air is constantly being blown out from the air micro nozzle during measurement work, the operating cost of the compressor that supplies the air will be high. Although the amount of air used can be saved, the disadvantage is that it puts a strain on the grip strength of the operator and causes great fatigue.

In view of this, this invention provides an opening/closing part for the 3-port 2-posit valve of the air micro nozzle in a storage jig in which the air micro nozzle is placed, and when the air micro nozzle is lifted, the air to be measured is sent to the operator. To provide an air supply device for an air micrometer capable of reducing the cost by saving the amount of air used without increasing the load.

[Means to solve the problem]

In order to achieve the above object, an air supply device for an air micrometer according to the present invention has three ports and two ports from an air source.
Metering air is supplied to the meter display and the air micro nozzle through the positive valve, and the speed controller is connected to the 3-port 2-positive valve by bypass, and a storage jig with an air outlet on the top is provided, and the air outlet is The reason is that when the opening/closing pressure of 3-port 2-posi valve is applied to the 3-port 2-posi valve and the air outlet is closed, the 3-port 2-posi valve closes and a small amount of air flows from the speed controller to the meter display.

[Effect]

When lifting the air micro nozzle and performing measurement work, the air outlet in the storage chamber is opened to allow air to flow and the pressure to drop, opening the 3-port 2-posi valve and supplying the air necessary for measurement to the air micro nozzle. It can be sent and measured. When the measurement is finished and the air micro nozzle is placed on the storage jig, the air outlet closes and the pressure increases.
Port 2 position valve closes. As a result, the amount of air that can be measured is stopped being sent to the air micro nozzle. However, even if the 3 port 2 position valve is closed,
A small amount of power is sent from the speed controller to the meter display, preventing the float pointer from bottoming out and allowing the next measurement to be taken immediately. The air micro nozzle has an air outlet on its circumference, and when inserted into a cylinder, the float pointer on the meter display measures the pressure difference that occurs in the gap between the nozzle and the inner diameter of the cylinder. The storage jig is designed so that the air micro nozzle can be stacked and stored together with the pass-side and stop-side master rings at the end of the work.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Air source 1 is connected to a meter display 3 via a 3-port 2-posi valve 2, and then to an air micro nozzle 4. The air micro nozzle 4 is provided with an air outlet 5 on its circumferential surface, and the meter display 3 is provided with a float pointer 6 that displays pressure. The speed controller 7 is connected to the 3-port 2-posi valve 2 by bypassing it, and even when the 3-port 2-posi valve 2 is closed, a small amount of air is sent from the speed controller 7 to the meter display 3 to prevent the float pointer 6 from reaching the bottom. is prevented.

The storage jig 8 is provided with an air outlet 9 on the upper surface, and the air source 1 is equipped with a regulator 1 for adjusting the air blowing pressure.
0 through a speed controller 11 that adjusts the flow rate of air. When the pressure of the air outlet 9 is applied to the 3-port 2-posi valve 2, the air outlet 9 is closed, and the pressure increases, the 3-port 2-posi valve 2 is closed. The storage jig 8 is configured so that the air micro nozzles 4 can be stacked and stored together with the master rings 12 on the pass side and the stop side at the end of the work. 1 is provided with a main stopcock 13.

〔Effect of the invention〕

As explained above, since the present invention is configured as described above, measurement air is sent to the air micro nozzle only while the air micro nozzle is lifted from the storage jig and measurement work is performed, and the amount of air used is reduced. You can save money. Additionally, the float pointer on the meter display will not bottom out, allowing you to take the next measurement smoothly. Furthermore, since there is no need to hold the on-off valve, operator fatigue can be reduced.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an overall piping diagram, and Fig. 2 is a front view of an air micro nozzle stored in a storage jig. 1...Air source, 2...3 port 2 position valve, 3
...Meter display, 4.Air micro nozzle, 7.Speed controller 8.Storage jig, 9.Air discharge port.

Claims (1)

[Claims] A storage jig that supplies metering air from an air source to the meter display and air micro nozzle via a 3-port 2-posi valve, and connects the 3-port 2-posi valve by bypassing the speed controller, with an air discharge port on the top surface. 3 ports and 2 ports to control the opening and closing pressure of the air outlet.
An air supply device for an air micrometer, characterized in that when an air discharge port is closed in addition to a positive valve, a 3-port 2-positive valve closes, allowing a small amount of air to flow from a speed controller to a meter display.