JPS61236907A - Air pulse generator - Google Patents

Abstract

PURPOSE:To obtain an air pulse generator for which easy handling is permitted, by taking out the compressed air continuously supplied as the compressed air in single air pulse by the self force. CONSTITUTION:A compressed-air inlet 10 is formed onto the front part 9 of a cylinder casing 1 opposed to the small-diameter pressure receiving surface 4 of a piston 3. Further, an air sink 11 is formed at the rear part of the cylinder casing 1 opposed to a large-diameter pressure receiving surface 5. Further, a small-diameter orifice 4 for introducing the compressed air flowing from the compressed-air inlet 10 to the air sink 11 is formed onto the small-diameter pressure receiving surface 4, and a compressed-air outlet 16 which is opened only when the piston 3 is positioned at a retreat limit is formed onto the piston sliding wall 15 of the cylinder casing 1. With such constitution, an air pulse generator for which easy handling is permitted can be obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air pulse generator, and more particularly to a device for converting continuously applied compressed air into a single pulse of compressed air. .

[Prior art] Conventionally, in each pneumatic power circuit and pneumatic control circuit,
Operated by compressed air in the form of a single air pulse (compressed air that is applied intermittently, as opposed to compressed air that is applied continuously, and each air pulse) There are a variety of devices or circuit systems that may be used, such as pulse-actuated actuators, ejectors, one-shot air circuit systems, and air safety circuit systems for preventing such operation.

In these cases, it is necessary to supply air pulses to these devices and circuit systems, but in the past, there has been almost no convenient dedicated equipment for this purpose.

Therefore, 1. For example, a valve is installed in the compressed air line leading to the equipment that requires air pulses, and this valve is switched for a limited time by electrical operation, electromagnetic operation, another air system, hydraulic operation, etc. to apply air pulses to those equipment. It is conceivable to send it.

[Problems to be Solved by the Invention] Conventionally, there is no dedicated and convenient air pulse generator, so valves and other electrical control systems to drive the valves have to be used, resulting in a complicated structure. As a result, troubles are likely to occur due to an increase in failure factors, and costs are likely to increase.

Also, it cannot be used in places where electrical means for driving the valve cannot be used, and even if other hydraulic or pneumatic systems are used to drive the valve, the piping space will increase, so it is limited. It cannot be installed in a space with
There were restrictions on use.

In particular, it was relatively troublesome to operate and handle.

Therefore, an object of the present invention is to provide a special device capable of converting continuously applied compressed air into a single air pulse and taking it out, and in particular, is simple in structure and trouble-free. The purpose is to provide an air pulse generator that is inexpensive in terms of cost, is small and lightweight, can be used freely even in narrow confined spaces, and is easy to handle without requiring external operations. To provide an air pulse generator.

[Means for solving the problems] In order to achieve the above object, the present invention has the following technical means. That is, to explain this using the reference numerals in the drawings corresponding to the embodiments, this air pulse generator has a piston 3 in which a small-diameter pressure receiving surface 4 and a large-diameter pressure receiving surface 5 are formed, which is slidable inside a cylinder casing l. It is located in

A compressed air inlet 10 is formed in the front part 9 of the cylinder casing 1 facing the small diameter pressure receiving surface 4 of the piston 3, and an air pocket is formed in the rear part of the cylinder casing 1 facing the large diameter pressure receiving surface 5. is formed.

Further, a small-diameter orifice 1 is provided for guiding the compressed air flowing from the compressed air port 10 into the small-diameter pressure receiving surface 4 to the air reservoir 11.
4, and the piston sliding wall 15 of the cylinder casing l is formed with a compressed air outlet 18 that is opened only when the piston 3 is located at the retraction limit.

The retraction limit of the piston 3 is given by a spacer-like stopper 13 disposed at the boundary between the cylinder chamber 2 and the air reservoir 11.

[Operation 1] According to the above configuration, when compressed air is supplied from the compressed air inlet 10, the air pressure acts on the small diameter pressure receiving surface 4, so that the piston 3 is moved toward the air reservoir 11 and stopped by the stopper 13. The compressed air outlet 1B is thereby opened, so that the compressed air flows out from the inlet IO toward the outlet 1B. At the same time, compressed air is introduced into the air reservoir 11 through the small-diameter orifice 14, and when the inside of the air reservoir 11 reaches a certain pressure, the piston 3
Due to the difference in area between the small diameter pressure receiving surface 4 and the large diameter pressure receiving surface 5 and the large thrust difference, it moves toward the inlet 10 and closes the compressed air outlet 16 at the forward limit. As a result, the single air pulse of the compressed air discharged from the compressed air outlet 1B ends.

Then, the supply of compressed air from the compressed air inlet 10 is once cut off, and this state continues until it is discharged and compressed air is continuously added to the first stage, and is repeated thereafter.

[Example 1 Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 indicates a cylinder casing, and a piston 3 is slidably disposed within a cylinder chamber 2 formed in the cylinder casing. The piston 3 has a small diameter pressure receiving surface 4 on one side and a large diameter pressure receiving surface 5 on the other side, and correspondingly, the cylinder chamber 2 is also divided into a small diameter part 7 and a large diameter part 8 by a stepped part 6. ing.

A compressed air inlet 10 is formed in the front portion 9 of the cylinder casing 1 facing the small-diameter pressure receiving surface 4 of the piston, and an air reservoir 11 is defined in the rear portion facing the large-diameter pressure receiving surface 5. . That is, by screwing the air reservoir lipody 12 onto the cylinder casing 1, an air reservoir 11 is formed behind the large diameter pressure receiving surface 5.

The forward limit of the piston 3 that reciprocates in the cylinder chamber z is the position where the intermediate portion of the piston 3 hits the stepped portion 6 of the cylinder casing, and the backward limit is determined as follows. That is, when the air reservoir lipody 12 is screwed onto the cylinder casing 1, a spacer-like stopper 13 is interposed between the two, and this stopper 13 sets the position where the large diameter pressure receiving surface 5 is stopped by the piston 3. is set as the retreat limit.

A small-diameter orifice 14 is formed in the small-diameter pressure receiving surface 4 for guiding compressed air introduced from the compressed air inlet 10 to the air reservoir 11.

Furthermore, a compressed air outlet 1B is provided on the sliding wall 15 of the cylinder chamber 2.
is formed. This formation position is such that when the piston 3 is at the 5th retraction limit and its large diameter pressure receiving surface 5 abuts against the stopper 13, the compressed air outlet 18 is not blocked by the piston 3, but on the contrary, during operation. When the piston 3 is at the forward limit and its intermediate portion abuts against the stepped portion 6, the piston 3 connects the compressed air inlet 10 and outlet IB.
It is formed by selecting a position where the light is blocked.

Based on this configuration, its operation will be explained.

When compressed air is continuously supplied from the compressed air inlet 10 from the state shown in FIG. 13 side, and moves to a position where the large diameter pressure receiving surface 5 touches the stopper 13, that is, moves to the backward limit. As a result, the compressed air outlet 18 is opened, and the compressed air is discharged from the outlet IB and supplied to an air pulse using device (not shown). At the same time, the compressed air flowing in from the inlet 10 flows into the air reservoir 11 via the small diameter orifice 14 of the small diameter pressure receiving surface 4 . This inflow causes air pocket 11
When the internal pressure reaches a certain level, the piston 3.

Due to the area difference between the small diameter pressure receiving surface 4 and the large diameter pressure receiving surface 5 and the large thrust difference, the piston moves toward the inlet 10 side, and the middle part of the piston forms the step part 6.
It stops at the forward limit position, which corresponds to .

That is, the state returns to the state shown in FIG. As a result, the single air pulse of the compressed air discharged from the compressed air outlet IB ends. Then, the supply of compressed air from the compressed air inlet 10 is once cut off and discharged, and this state continues until the next time compressed air is continuously added, and is repeated thereafter.

According to experiments, compressed air in a range of about 1.8 to 9.9 kg/crn" can be used, and the time it takes for the piston 3 to go from the forward limit position to the backward limit and return to the forward limit again is: Although it is determined by the volume of the air pocket 11, the response speed can be about 115 seconds.

[Effects of the Invention] As described above, the present invention allows continuously applied compressed air to
It is possible to provide a device that can convert and extract compressed air as a single air pulse using its own blade without using any other electrical control system or separate pneumatic or hydraulic control system.

Further, since the operating part itself is only a piston and has a simple structure, it is possible to provide an air pulse generator that is trouble-free and inexpensive. Moreover, since it is small and lightweight, it can be used freely even in a narrow and limited space, and it has the advantage of providing an air pulse generator that does not require any external operation and is easy to handle.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, with FIG. 1 showing the piston at its forward limit and blocking the compressed air outlet, and FIG. 2 showing the piston at its retracting limit and blocking the compressed air outlet. In the figure, 1 is the cylinder casing, 2 is the cylinder chamber, 3 is the piston, 4 is the small diameter pressure receiving surface, 5 is the large diameter pressure receiving surface, 9 is the front part of the cylinder casing,
10 is a compressed air inlet, t x t-h air reservoir, 12
13 is an air reservoir rebody, 13 is a stopper, 14 is a small diameter orifice, and IB is a compressed air outlet.

Claims (1)

[Claims] A piston having a small-diameter pressure-receiving surface and a large-diameter pressure-receiving surface is slidably disposed in the cylinder casing, and a compressed air inlet is formed in the front part of the cylinder casing facing the small-diameter pressure-receiving surface of the piston. An air reservoir is formed in the rear part of the cylinder casing facing the large diameter pressure receiving surface, and a small diameter orifice is formed in the small diameter pressure receiving surface for guiding the compressed air flowing from the compressed air inlet to the air reservoir, and a piston of the cylinder casing is formed. An air pulse generator characterized in that the sliding wall is formed with a compressed air outlet that is opened only when the piston is regulated by a retraction limit stopper and is located at the retraction limit.