JP2002145435A - Air vibration type parts feeder and air driving type vibration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low cost vibration type parts feeder in which an adjustment of a vibration number is easy and an energy consumption amount (running cost) such as an electric power is less. SOLUTION: When a container for feeding parts is vibrated by a single acting type air cylinder 22 and a return spring (not shown), a feed/discharge state of a pressure air against the single acting type air cylinder 22 is switched to vibrate the container by alternately switching a direction-control valve 48 by a pilot air pressure fed from pilot passages 54, 60. The pilot air pressure is mechanically changed by a pilot switch circuit 52 such as a threshold valve 58. Flow control valves 62, 64 are provided on the pilot passages 60, 54 respectively and a switching timing of the direction-control valve 48 and a vibration number of the container can be adjusted by adjusting a flow rate of the pressure air thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating parts feeder, and more particularly to an air vibrating parts feeder that vibrates using an air cylinder.

[0002]

2. Description of the Related Art (a) A container, which is arranged substantially horizontally and contains a number of parts to be fed, and (b) supports the container movably in a substantially horizontal predetermined vibration direction. A supporting device, and (c) a vibrating device that reciprocates the container at different speeds during forward and backward movements in the vibration direction,
(d) A vibratory parts feeder that moves the parts in the vibration direction by the reciprocating motion is widely used as a part supply device such as an assembling device. Tokiko 63-24
The devices described in Japanese Patent No. 891 and Japanese Patent Publication No. 52-4818 are examples, and the internal parts are rotated by reciprocating a bottomed cylindrical container around a center line using a cam mechanism or an electromagnet. It is designed to rotate and feed.

[0003]

However, in such a conventional vibrating parts feeder, since the cam is rotated by an electric motor or vibrated by an electromagnet, the power consumption is relatively large, and the reciprocating motion of the reciprocating motion is relatively large. In order to adjust the frequency, that is, the feed speed of the parts, it is necessary to electrically control the rotation speed of the electric motor and the switching speed of the exciting current, and there is a problem that the apparatus becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an inexpensive vibration system in which the frequency of reciprocating motion is easily adjusted and energy consumption such as electric power (running cost) is small. To provide a type parts feeder.

[0005]

In order to achieve the above object, a first invention comprises (a) a container which is arranged substantially horizontally and contains a large number of parts to be fed, and (b) A supporting device that supports the container so as to be movable in a substantially horizontal predetermined vibration direction, and (c) a vibration device that reciprocates the container at different speeds during forward movement and backward movement in the vibration direction. , And
(d) a vibrating parts feeder for moving the parts in the vibration direction by the reciprocating motion, (e) the vibrating device moves the piston by (e-1) pressure air to vibrate the container. Air cylinder to move in the direction
-2) a switching valve that switches the supply and discharge state of the pressure air to the air cylinder by the pilot air pressure;
(e-3) by mechanically changing the pilot air pressure based on the air pressure between the switching valve and the air cylinder and alternately switching the state of the switching valve at a predetermined timing, the container And a pilot switching circuit for reciprocating at a predetermined frequency.

According to a second aspect of the present invention, there are provided (a) a container which accommodates a number of parts to be fed in a substantially horizontal arrangement, and (b) supports the container so as to be movable in a substantially horizontal predetermined vibration direction. A supporting device, and (c) a vibrating device for reciprocating the container at different speeds in the forward and backward movements in the vibration direction, and (d) the parts by the reciprocating motion. (E) the vibration device, (e-1) a single-acting air cylinder that moves the container in the vibration direction by moving a piston by pressure air (E-2) a return spring that moves the container moved by the piston in the opposite direction and returns the piston, and (e-3) supplies pressure air to the single-acting air cylinder from a pressure air source. Air supply from the single-acting air cylinder A switching valve that has a discharging state that allows discharging, and a switching valve that switches between the supply state and the discharging state by pilot air pressure, (e-4) the switching valve and the single-acting air cylinder A pilot switching circuit for reciprocating the container at a predetermined frequency by mechanically changing the pilot air pressure based on the air pressure between the two and switching the state of the switching valve alternately at a predetermined timing. And is characterized by having.

According to a third aspect of the present invention, in the air vibration type part feeder according to the second aspect of the present invention, (a) the switching valve switches the discharge state to the supply state by supplying the pilot air pressure. And a discharge-side pilot port for switching from the supply state to the discharge state when the pilot air pressure is supplied, while (b) the pilot switching circuit includes (b)
-1) a discharge pilot passage that guides pressure air supplied from the switching valve to the single-acting air cylinder to the discharge pilot port as the pilot air pressure, (b-
2) a threshold valve for mechanically outputting the pressure air supplied from the pressure air source when the air pressure of the single-acting air cylinder decreases, and (b-3) the pressure air output from the threshold valve. And a supply-side pilot passage that guides the pilot air pressure to the supply-side pilot port.

According to a fourth aspect of the present invention, in the air vibration type part feeder according to any one of the first to third aspects, a flow control valve is provided in the pilot air pressure passage, and the flow control valve uses the pressure air as the pressure control valve. The frequency of the reciprocating motion of the container can be adjusted by changing the flow rate of the container and changing the switching timing of the switching valve.

According to a fifth aspect of the present invention, there is provided a vibrating device for reciprocating a vibrating object movably disposed in a predetermined vibration direction in the vibration direction, wherein (a) the piston is moved by pressurized air. An air cylinder for moving an object to be oscillated in the vibration direction, (b) a switching valve for switching the supply / discharge state of pressure air to the air cylinder by pilot air pressure, and (c) a switching valve for switching the switching valve and the air cylinder. A pilot switching circuit for reciprocating the vibration object at a predetermined frequency by mechanically changing the pilot air pressure based on the air pressure during the switching and alternately switching the state of the switching valve at a predetermined timing. (D) disposed in the pilot air pressure passage, and adjusting the flow rate of the pressurized air to change the switching timing of the switching valve, whereby the forward and backward movement of the vibration object A flow control valve for adjusting the frequency of the backward movement.

[0010]

According to the air vibration type part feeder of the first invention, the state of the switching valve is alternately switched by the pilot air pressure, whereby the state of supply and discharge of the compressed air to the air cylinder is switched, and the container is opened. The container is reciprocated at a predetermined frequency and its pilot air pressure is mechanically changed based on the air pressure between the switching valve and the air cylinder. It is possible to vibrate, the energy consumption of electric power and the like is reduced, the running cost is reduced, and an expensive control device is unnecessary and the device is inexpensively configured. Further, if a flow rate control valve is provided in the pilot air pressure passage as in the fourth invention, the flow rate of the pressure air is adjusted by the flow rate control valve to change the switching timing of the switching valve. , That is, the feeding speed of the parts can be easily adjusted. In the air-driven vibrating apparatus according to the fifth aspect, substantially the same effects as those of the first and fourth aspects can be obtained.

The second invention using the single-acting air cylinder and the return spring substantially corresponds to an embodiment of the first invention, and the same effects as those of the first invention can be obtained. In addition, since the consumption of the pressure air is reduced (substantially halved) as compared with the double-acting air cylinder, the energy consumption of the electric air pump or the like for generating the pressure air is further reduced.

In the third invention, a switching valve having a pair of a supply-side pilot port and a discharge-side pilot port is used, and a supply state and a discharge state are switched by supplying pilot air pressure to each pilot port. As a result, the switching timing in both directions of the switching valve, in other words, the forward and backward movement timings of the reciprocating motion of the container can be separately adjusted as compared with the case where one of the switching operations is performed by a return spring or the like.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a container for storing parts, for example, a cylindrical shape with a bottom is used, and it is configured so that internal parts are rotated and fed by being reciprocated about the center line thereof. However, using a longitudinal container,
By linearly reciprocating in the longitudinal direction, the internal parts can be linearly moved in the longitudinal direction and fed.

In the second invention, a single-acting air cylinder is used in which only movement of the piston in one direction is performed by pressurized air. However, in the first and fifth embodiments, the piston is reciprocated by pressurized air. It is also possible to employ a double-acting air cylinder that moves. As these air cylinders, a direct-acting type that linearly moves the piston is preferably used, but a rotary cylinder that rotates the piston can also be used. When the container is reciprocated by using a rotary cylinder, the container can be directly fixed to the piston. In this case, the rotary cylinder also serves as a support device.

The switching valve has a pair of pilot ports, for example, as in the third invention, and is configured to be switched to two positions by supplying pilot air pressure to each pilot port. Switching can be performed by a return spring, and various switching valves that can be switched by pilot air pressure can be employed.

The pilot switching circuit is provided with, for example, a threshold valve as in the third aspect of the present invention, and based on the air pressure between the switching valve and the air cylinder,
The switching valve may be switched by changing the pilot air pressure without an external input, and various circuit configurations are possible.

In the fourth invention, the frequency is adjusted by controlling the flow rate of the pilot air pressure. In addition, the air pressure of the pressure air supplied from the pressure air source is adjusted by a pressure control valve or the like. By adjusting the spring force of the return spring when using a single-acting air cylinder, or by adjusting the supply flow rate and discharge flow rate of compressed air to the air cylinder with a flow control valve, It is also possible to adjust the vibration waveform including the frequency by changing the moving speed of the container.

As the flow control valve of the fourth invention, a flow control valve having a pressure compensating function for flowing the pressurized air at a constant flow rate irrespective of the air pressure change is preferably used. Various flow control valves such as a throttle valve that merely changes the flow rate can be adopted.

The air-driven vibration device of the fifth invention is suitably used as a vibration source of the vibration parts feeder according to the first to fourth inventions, but can also be used as another vibration source. Thus, the speeds during the forward movement and the backward movement may be substantially the same. If the reciprocating motion is performed at different speeds during the forward movement and the backward movement, it substantially corresponds to a vibration device in which the fourth invention is applied to the first invention.

Also, in the air-driven vibration device of the fifth invention, a single-acting air cylinder and a return spring are used as described in the second invention, or a pair of pilot ports are used as described in the third invention. Various modes are possible, such as adopting a switching valve having the same and configuring a pilot switching circuit using a threshold valve or the like.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing an air vibration type part feeder 10 according to one embodiment of the present invention, wherein FIG. 1 (a) is a partially cutaway plan view and FIG. 1 (b) is a front view. FIG.
FIG. 2 is a circuit diagram showing an air circuit 12 provided in the air vibration type part feeder 10. The air vibration type part feeder 10 includes a bottomed cylindrical (dish-shaped) container 14 that accommodates a large number of parts (eg, screws and other works) that are arranged substantially horizontally and that is to be fed, and a bearing or the like. The container 14 is reciprocated around the center line O at different speeds during forward and backward movements, and a supporting device 16 that supports the container 14 in a substantially vertical posture so as to be rotatable around the center line O. An air-driven vibrating device 18 is provided, and parts are rotated counterclockwise about a center line O as indicated by an arrow A and fed by reciprocating motion. The direction of rotation about the center line O is a predetermined vibration direction, and the container 14 corresponds to the vibration object of the fifth invention.

The air-driven vibrating device 18 includes a linearly projecting single-acting air cylinder 22 for projecting a piston rod 20 provided integrally with a piston 22p (see FIG. 2) by pressurized air, The air circuit 12 includes the air circuit 12 connected to the air cylinder 22 and a return spring 24. The piston rod 20 of the single-acting air cylinder 22 abuts on an arm 26 integrally fixed to the container 14. Then, the container 14 is rotated counterclockwise around the center line O. Urethane rubber 28 is attached to the tip of the piston rod 20 so that the impact at the time of collision with the arm 26 is reduced. The single-acting air cylinder 22 corresponds to the air cylinder of the first invention and the fifth invention. The single-acting air cylinder 22 is disposed on the base 30 so as to be rotatable about a substantially vertical axis, and the piston rod 20 and the arm 26 are connected so as to be relatively rotatable about a substantially vertical connecting pin. You may do it.

The return spring 24 is a tension coil spring, and is stretched between the arm 26 and the base 30. The return spring 24 always urges the container 14 to rotate clockwise about the center line O. Single acting air cylinder 2 against power
The container 14 rotated counterclockwise by 2 is returned clockwise and rotated, and the single-acting air cylinder 22 is rotated.
Is pushed back into the cylinder. A compression coil spring 32 is arranged around the piston rod 20 so that the piston rod 20 comes into contact with the head of the piston rod 20 immediately before reaching the pushing end, so that the impact when reaching the pushing end is reduced. Has become. The base 30 includes a bracket 34 to which the single-acting air cylinder 22 is attached, a return spring 24
, The support pin 16 and the like.

In the air circuit 12 shown in FIG. 2, a pressure air source 40 is provided in the air chamber 22a of the single-acting air cylinder 22.
To air filter 42, pressure control valve (regulator)
Pressure air is supplied through a pipe 44, a pipe 46, a switching valve 48, and a pipe 50.
Is composed of an electric air pump. Pressure control valve 4
Reference numeral 4 denotes a device which can manually adjust the air pressure so as to obtain a predetermined piston thrust required for vibration of the container 14, and is appropriately adjusted according to the pressure receiving area of the single-acting air cylinder 22, and the like.
In this embodiment, the cylinder diameter is about 25 mm and 2 × 9.8.
The air pressure is adjusted to about × 10 ⁴ Pa. Switching valve 48
Is a supply state (a state shown on the left side of FIG. 2) in which pressure air is supplied from the pressure air source 40 to the single-acting air cylinder 22;
A two-position switching valve that can be switched to a discharge state (a state shown on the right side of FIG. 2) that allows air to be discharged from the single-acting air cylinder 22, and discharges when a pilot air pressure is supplied. It has a supply-side pilot port 48a for switching from a state to a supply state, and a discharge-side pilot port 48b for switching from a supply state to a discharge state when a pilot air pressure is supplied.

The air circuit 12 also controls the pilot air pressure supplied to the pilot ports 48a and 48b based on the air pressure between the switching valve 48 and the single-acting air cylinder 22 without any external input. A pilot switching circuit 52 is provided which causes the container 14 to reciprocate at a predetermined frequency by alternately switching the switching valve 48 at a predetermined timing. The pilot switching circuit 52 includes a discharge pilot passage 54 that guides the pressure air supplied from the switching valve 48 to the single-acting air cylinder 22 from the pipe 50 to the discharge pilot port 48 b as a pilot air pressure. A threshold valve 58 for outputting the pressure air supplied from the pressure control valve 44 via the pipe 56 when the air pressure of the pressure decreases, and the supply-side pilot port 48a using the pressure air output from the threshold valve 58 as a pilot air pressure. And a supply-side pilot passage 60 for leading the air to the supply passage. Threshold valve 58 has the function of a logic circuit equivalent to FIG. 3, only when the pipe pressure P ₂ is a predetermined value of 50 (for example, one tenth of the pressure P ₁₎ below The pressure P ₁ in the pipe 56 is output to the supply-side pilot passage 60. (A) of FIG. 3 is a logical symbol,
(b) is a truth table.

The supply-side pilot passage 60 and the discharge-side pilot passage 54 are each provided with a flow control valve 6.
2, 64 are provided and pilot ports 48a, 48b
The frequency of the container 14 can be changed by separately adjusting the switching timing of the switching valve 48 by adjusting the flow rate of the pressure air supplied to the container 14, respectively. The flow control valves 62 and 64 are capable of manually adjusting the flow rate of the pressure air to the pilot ports 48a and 48b, thereby reducing the time until the pilot air pressure reaches the switching pressure at which the switching valve 48 can be switched. Can be adjusted. In addition,
The flow of air in the reverse direction is allowed to flow freely by the check valve. The flow control valves 62 and 64 correspond to flow control valves.

FIG. 4A shows a single-acting air cylinder 2 based on the state where the piston rod 20 is located at the pushing end.
2, which substantially corresponds to the vibration waveform of the reciprocating movement of the container 14, and in the present embodiment, the speed at the time of pushing is higher than that at the time of the piston rod 20 projecting, When the container 14 rotates to the left, the parts rotate together with the container 14. At the time of pushing, that is, when the container 14 rotates to the right, only the container 14 is rotated back by the inertia of the parts. Rotated counterclockwise as shown. This vibration waveform indicates that the air pressure of the pressure air supplied to the single-acting air cylinder 22 is controlled by the pressure control valve 4.
4 or by adjusting the spring force of the return spring 24 so that the container 1 can be moved forward and backward.
It is possible to appropriately set by changing the moving speed of 4 separately, and it is adjusted in advance so that the parts can be reliably fed in accordance with the weight of the parts, the friction with the container 14, and the like. The spring force of the return spring 24 can be adjusted, for example, by changing the position of the locking pin 36 on the base 30 side.

FIG. 4B shows that, when the piston rod 20 is protruded at a higher speed than when the piston rod 20 is pushed, the parts rotate together with the container 14 when the piston rod 20 is pushed, that is, when the container 14 rotates clockwise.
At the time of projecting, that is, when the container 14 is rotated to the left, only the container 14 is rotated back by the inertia of the parts, and this is repeated, whereby the parts are rotated clockwise in the container 14 in the direction opposite to the arrow A. For example, the air pressure of the pressure air supplied to the single-acting air cylinder 22 is increased by the pressure control valve 44, the spring force of the return spring 24 is reduced, or the switching valve 48 is pressed when the piston rod 20 is pushed. This can be achieved by providing a flow control valve for adjusting the flow rate of air released from the air into the atmosphere and reducing the flow rate.

Such an air vibration type parts feeder 10
According to the above, the switching valve 48 is alternately switched by the pilot air pressure, so that the single-acting air cylinder 22
The supply / discharge state of the compressed air to the container 14 is switched, and the container 14 is reciprocated at a predetermined frequency.
Since the pilot air pressure is mechanically changed by the pilot switching circuit 52 based on the air pressure between the switching valve 48 and the single-acting air cylinder 22, the pressure air source 4
It is possible to vibrate the container 14 only by generating pressure air at 0, thereby reducing the amount of energy consumption such as electric power and the like, and reducing running costs.

Further, since the flow control valves 62 and 64 are provided in the pilot passages 60 and 54, the flow rate of the compressed air is adjusted by the flow control valves 62 and 64 to change the switching timing of the switching valve 48. Container 1 by changing
4, the frequency of the reciprocating motion, that is, the feeding speed of the parts can be easily adjusted.

In this embodiment, the single-acting air cylinder 2
2 and the return spring 24 are used to reciprocate the container 14, so that the consumption of pressure air is reduced (substantially halved) as compared with the case of using a double-acting air cylinder. The power consumption by the electric air pump of the pressure air source 40 for generating the pressure is further reduced. According to the experiments of the present inventors,
In the case of reciprocating using a cam and an electric motor as described in Japanese Patent No. 24891, power of 60 W or more was required. In this embodiment, however, operation was possible with power of about 15 W.

A pair of supply-side pilot ports 48
a and a discharge side pilot port 48b are used, and the supply state and the discharge state are switched by supplying pilot air pressure to each of the pilot ports 48a and 48b. Switching timing in both directions of the switching valve 48,
In other words, the forward and backward movement timings of the reciprocating movement of the container 14 can be separately adjusted.

Also, since the container 14 is reciprocated around the center line O without vertical vibration and is fed by sliding due to the inertia of the parts, noise and damage to the parts due to collision between parts are suppressed. Is done.

The air-vibrating parts feeder 10 of the above-mentioned embodiment feeds parts by vibrating the bottomed cylindrical container 14 around the center line O. The air-vibrating parts feeder 10 shown in FIG. Like the parts feeder 70, the longitudinal container 72 is disposed substantially horizontally and movably in the longitudinal direction by a support device 74 such as a guide rail, while using a single-acting air cylinder 76 and a return spring 78, The single-acting air cylinder 76 is operated by the air circuit 12.
By switching the supply / discharge state of compressed air to the container 72, the container 72 can be linearly reciprocated in the longitudinal direction, and the internal parts can be linearly moved in the longitudinal direction to be fed.

The embodiments of the present invention have been described in detail with reference to the drawings. However, these are merely examples, and the present invention is based on the knowledge of those skilled in the art. Can be implemented.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an air vibration type part feeder according to an embodiment of the present invention, in which (a) is a plan view with a part cut away,
(b) is a front view.

FIG. 2 is a circuit diagram showing an air circuit provided in the air vibration type part feeder of FIG.

3A and 3B are diagrams for explaining the function of a threshold valve of the air circuit of FIG. 2, wherein FIG. 3A is an equivalent logical symbol, and FIG. 3B is a truth table.

FIG. 4 is a diagram showing a change in a piston stroke of a single-acting air cylinder in the embodiment of FIG. 1, in other words, a vibration waveform of a reciprocating motion of a container. (B) is a case where parts are fed in the direction of pushing the piston.

FIG. 5 is a schematic view showing another embodiment of the present invention, in which parts are moved linearly and fed.

[Explanation of symbols]

10, 70: Air vibration parts feeder 14, 7
2: Container (vibration target) 16, 74: Support device 18: Air-driven vibration device (vibration device) 22, 76: Single-acting air cylinder (air cylinder) 24, 78: Return spring
40: Pressure air source 48: Switching valve 48a: Supply-side pilot port 48b: Discharge-side pilot port 52: Pilot switching circuit 54: Discharge-side pilot passage 58: Threshold valve 60: Supply-side pilot passage 62, 64: Flow control valve (Flow control valve)

Claims (5)

[Claims] 1. A container which is arranged substantially horizontally and contains a number of parts to be fed, a supporting device which supports the container movably in a substantially horizontal predetermined vibration direction, and the container A vibrating device that reciprocates at different speeds during the forward and backward movements in the vibration direction, and a vibratory parts feeder that moves the parts in the vibration direction by the reciprocation, An air cylinder configured to move the container in the vibration direction by moving a piston by pressurized air, a switching valve configured to switch a supply / discharge state of the pressure air to the air cylinder by a pilot air pressure; By mechanically changing the pilot air pressure based on the air pressure between the air valve and the air cylinder to alternately switch the state of the switching valve at a predetermined timing, Air vibratory parts feeder being characterized in that it is configured to have a pilot changeover circuit for reciprocating the container at a predetermined frequency, a. 2. A container which is arranged substantially horizontally and contains a large number of parts to be fed, a supporting device which supports the container so as to be movable in a substantially horizontal predetermined vibration direction, and said container. A vibrating device that reciprocates at different speeds during the forward and backward movements in the vibration direction, and a vibratory parts feeder that moves the parts in the vibration direction by the reciprocation, A single-acting air cylinder for moving the container in the vibration direction by moving a piston by pressurized air, and a return spring for moving the container moved by the piston in the opposite direction and returning the piston A supply state in which pressurized air is supplied from a pressure air source to the single-acting air cylinder, and a discharge state in which air is allowed to be discharged from the single-acting air cylinder. A switching valve for switching between a supply state and a discharge state thereof by a pilot air pressure; and mechanically controlling the pilot air pressure based on an air pressure between the switching valve and the single-acting air cylinder. And a pilot switching circuit that reciprocates the container at a predetermined frequency by changing the state of the switching valve alternately at a predetermined timing. Type parts feeder. 3. A supply-side pilot port for switching from the discharge state to the supply state when the pilot air pressure is supplied, and a switching valve for supplying the pilot air pressure from the supply state when the pilot air pressure is supplied. A discharge-side pilot port for switching to a discharge state, wherein the pilot switching circuit converts pressure air supplied from the switching valve to the single-acting air cylinder to the discharge-side pilot port as the pilot air pressure. A discharge-side pilot passage for guiding, a threshold valve for mechanically outputting pressure air supplied from the pressure air source when the air pressure of the single-acting air cylinder decreases, and a pressure air output from the threshold valve To the supply-side pilot port as the pilot air pressure. Air vibratory parts feeder according to claim 2, characterized in that it comprises a passage, a. 4. A reciprocating motion of the container by providing a flow control valve in the passage of the pilot air pressure and adjusting a flow rate of the pressure air by the flow control valve to change a switching timing of the switching valve. The air vibration type parts feeder according to any one of claims 1 to 3, wherein the vibration frequency is adjustable. 5. A vibration device for reciprocating a vibration object movably disposed in a predetermined vibration direction in the vibration direction, wherein the vibration object is moved by moving a piston by pressurized air. An air cylinder to be moved in the direction, a switching valve for switching the supply / discharge state of the pressure air to the air cylinder by a pilot air pressure, and the pilot air pressure based on an air pressure between the switching valve and the air cylinder. A pilot switching circuit that reciprocates the vibrating object at a predetermined frequency by alternately switching the state of the switching valve at a predetermined timing by mechanically changing the switching valve; By changing the switching timing of the switching valve by adjusting the flow rate of the pressurized air, the flow for adjusting the frequency of the reciprocating motion of the vibration object is adjusted. Air-driven vibrator, characterized in that it comprises a control valve, the.