JPH06165972A - Washing device - Google Patents

Abstract

PURPOSE:To surely prevent the damage to the ultrasonic vibrator transducer in a washing tank even if a basket and the material to be washed falls into the washing tank. CONSTITUTION:A vibrator transducer protective cover 14 is provided within the normal washing tank 2, and therefore falling objects come into contact with the vibrator transducer protective cover 14 and the protective cover 14 receives the falling objects when the basket 11 falls into the normal washing tank 2 or when the parts fall from the basket 11 into the normal washing tank 2. The failure of the ultrasonic vibrator transducer 13 is thus obviated. In addition, the vibrator transducer protective cover 14 is formed to a mesh shape of a proper size, and therefore the ultrasonic waves from the ultrasonic vibrator transducer 13 are well transmitted and the degradation in the detergency of the parts is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for preliminarily cleaning a part when painting or assembling the part, and more particularly to a cleaning device suitable for cleaning the part using ultrasonic waves. .

[0002]

2. Description of the Related Art In a cleaning device using ultrasonic waves,
Ultrasonic transducers are installed on the inner bottom and inner sides of the cleaning tank containing the cleaning liquid, and a basket containing the parts to be cleaned is stored in the cleaning tank. There is one in which an object to be cleaned is washed by radiating an ultrasonic wave toward it. Such a conventional cleaning apparatus, when setting the basket containing the object to be cleaned in the cleaning tank, automatically sets the basket by the transfer device, cleans it, and then removes the basket by the transfer device to perform the next process. It is configured to be transported to.

[0003]

In the prior art described above, when the basket containing the object to be cleaned is to be set in the cleaning tank by the transfer device, the basket comes off the transfer device and falls into the cleaning tank. Or, the object to be cleaned may come out of the removed basket and fall into the cleaning tank, so that the dropped basket or the object to be cleaned hits the ultrasonic vibrator in the cleaning tank and damages the vibrator.
Not only is the cleaning function not fully exhibited, but the life of the vibrator is shortened.

In view of the above-mentioned problems of the prior art, an object of the present invention is to reliably prevent damage to the ultrasonic transducer in the cleaning tank even if the basket or the object to be cleaned falls into the cleaning tank. An object of the present invention is to provide a cleaning device that can be used.

[0005]

In the cleaning device of the present invention, a vibrator protection cover that protects the surface of the ultrasonic vibrator and allows the ultrasonic waves from the ultrasonic vibrator to pass through is attached to the cleaning tank. It is characterized by

[0006]

In the present invention, as described above, since the vibrator protection cover that protects the surface of the ultrasonic vibrator and can transmit the ultrasonic wave from the ultrasonic vibrator is attached to the cleaning tank, If the basket containing the parts falls into the washing tank,
Alternatively, when a part falls from the basket into the cleaning tank, the fallen object only hits the transducer protective cover, and the protective cover receives the fallen object, so the ultrasonic transducer is not damaged by the fallen object. Absent. Moreover, not only the transducer protection cover protects the ultrasonic transducer,
By being formed in a mesh shape of an appropriate size, it is possible to satisfactorily transmit ultrasonic waves from the ultrasonic vibrator,
The cleaning power of parts by ultrasonic waves does not decrease. Therefore, it is possible to prevent the ultrasonic vibrator from being damaged by the falling objects in the cleaning tank, and as a result, the cleaning power does not decrease.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is an overall explanatory view showing an embodiment of a cleaning apparatus of the present invention, FIG. 2 is a perspective view showing a vibrator protective cover,
FIG. 3 is an explanatory diagram showing the relationship between the mesh of the transducer protection cover and the transmittance of ultrasonic waves. The cleaning device 9 of the embodiment cleans a molded metallic part by using ultrasonic waves, and as shown in FIG.
1 is taken into the inside of the apparatus 9 by the carry-in conveyor 10, and its parts are taken out of the apparatus from the carry-out conveyor through the washing process, the rinsing process and the drying process. Therefore, in the cleaning device 9, a pre-cleaning tank 1, a main cleaning tank 2, three rinsing tanks, and a drying furnace 6 are sequentially provided between the carry-in conveyor 10 and the carry-out conveyor 12, and the transport mechanism 7 is located above them. Is provided. Specifically, the transport mechanism 7 has a plurality of hooks 8 having a hook shape, and the baskets 11 carried in by the carry-in conveyor 10 by moving the arms 8 in the horizontal direction and the vertical direction as shown by arrows. After putting it in the preliminary cleaning tank 1, the basket in the preliminary cleaning tank 1 is taken out and put in the main cleaning tank 2, and then the basket 11 is taken in and out with respect to the three rinsing tanks 3 to 5 and the drying furnace 6 in order. Similarly, the basket taken out from the drying furnace 6 is placed on the carry-out conveyor 12. The pre-cleaning tank 1 is configured to contain a cleaning agent and forcibly circulates the cleaning agent. When the basket 11 from the carry-in conveyor 10 is loaded by the transport mechanism 7, dust attached to the parts in the basket. Pre-wash by washing off oil and oil. In addition, in the preliminary cleaning tank 1, a removing means for removing the washed-out dust and oil is provided. The main cleaning tank 2 contains a cleaning agent inside, and the ultrasonic vibrator 1 is provided on the inner bottom.
3 are installed. Then, when the basket 11 that has passed through the preliminary cleaning tank 1 is put into the main cleaning tank 2 by the transport mechanism 7, ultrasonic waves from the ultrasonic transducer 13 are radiated to the parts in the basket, so that the parts are main cleaned. To do. Therefore, the basket 11 is configured so that ultrasonic waves can be transmitted therethrough to clean the internal components. The three rinsing tanks consist of a primary rinsing tank 3 containing water (or hot water), a secondary rinsing tank 4 and a finishing rinsing tank 5, and the main rinsing tank 2
The baskets 11 that have passed through are sequentially inserted by the transport mechanism 7, thereby rinsing the components. When the basket 11 that has passed through the finish rinsing tank 5 is put into the drying furnace 6 by the transport mechanism 7, the components in the basket 11 are dried by the hot air supplied by an electric heater or the like. For the components dried in the drying oven 6, the transport mechanism 7 takes out the basket taken out from the drying oven 6 and carries out the conveyor 1.
It is discharged from the cleaning device 9 by being placed on 2.

In the present embodiment, even if the basket 11 and the parts therein fall into the main cleaning tank 2, the vibrator protection cover 14 is provided to protect the ultrasonic vibrator 13 from the basket 11 and the parts. It is attached to the main cleaning tank 2.
As shown in FIG. 2, the vibrator protection cover 14 protects the ultrasonic vibrator 13 and radiates ultrasonic waves from the ultrasonic vibrator toward the components in the main cleaning tank 2. 14a is formed in a square mesh shape to form a box shape, and the ultrasonic transducer 13 is mounted inside the main cleaning tank 2 with bolts. Therefore, the vibrator protection cover 14 is provided with a bracket 15 for bolting. The mesh size of the vibrator protection cover 14, that is, the size of the opening through which the ultrasonic waves pass is as shown in FIG. FIG. 3 is a curve diagram when the ultrasonic frequency is 28 KHz, which shows that the mesh opening is 5 mm.
When it becomes smaller than (area 25 mm ² ) or less, the transmittance of ultrasonic waves decreases to 30% or less, and when it becomes 10 mm, the transmittance increases to 85% and when it becomes 15 mm it becomes about 93%. Means that ultrasonic waves are hardly affected by the mesh. Therefore, the mesh area should be at least 200 mm ² or more so that the cleaning power of ultrasonic waves does not decrease, and that the parts in the basket do not pass through when they fall. Is preferred. Further, the material of the vibrator protective cover 14 forming a mesh is such that it does not attenuate the rectilinear wave property of ultrasonic waves, and it does not corrode with the cleaning agent.
It is required that the basket and parts have high mechanical strength to withstand the impact even if they fall, and in this example, they are made of stainless steel or a similar metal material.

As described above, since the vibrator protection cover 14 is attached to the inside of the main cleaning tank 2, the basket 11 containing the parts should be removed from the transport mechanism 7 and the main cleaning tank 2 should be removed.
When the component falls from the basket 11 to the main cleaning tank 2, the fallen object only hits the transducer protection cover 14, and the protection cover 14 receives the fallen object. The vibrator 13 is not damaged by a falling object. Moreover, the oscillator protective cover 1
4 not only protects the ultrasonic transducer 13 but also is formed into a mesh shape of an appropriate size, so that the ultrasonic wave from the ultrasonic transducer 13 can be satisfactorily transmitted, and the ultrasonic component The detergency does not decrease. Also,
Since the vibrator protection cover 14 is made of stainless steel or a similar metal material and has mechanical strength against a falling object and corrosion resistance against a cleaning agent, it can be used for a long period of time, and the protection cover can be used. The reliability as 14 can be improved. In the illustrated embodiment, the parts are put in the basket and the basket is conveyed by the conveying mechanism 7. However, the same effect can be obtained even when the parts are directly conveyed. Of course you can.

[0010]

As described above, according to the first aspect of the present invention, the surface of the ultrasonic vibrator is protected and the vibrator protection cover that can transmit the ultrasonic wave from the ultrasonic vibrator is washed. Even if the basket or parts fall into the cleaning tank by being attached to the cleaning tank, the falling objects are received by the ultrasonic transducer, so if the falling objects in the cleaning tank damage the ultrasonic transducer. As a result, the cleaning power by ultrasonic waves is not reduced, and according to claim 2, the vibrator protection cover has a mesh shape of a size that allows ultrasonic waves to pass through and does not corrode with the cleaning liquid. Since it is made of a material, there is an effect that the cleaning power by ultrasonic waves can be maintained for a long time.

[Brief description of drawings]

FIG. 1 is an overall explanatory view showing an embodiment of a cleaning device of the present invention.

FIG. 2 is a perspective view showing a vibrator protection cover.

FIG. 3 is an explanatory curve diagram showing the relationship between the mesh size of the transducer protection cover and the ultrasonic transmittance of the ultrasonic transducer.

[Explanation of symbols]

2 ... main cleaning tank, 13 ... ultrasonic transducer, 14 ... transducer protective cover.

Claims (2)

[Claims] 1. An ultrasonic transducer is installed inside the cleaning tank,
At the time of cleaning, in a cleaning device for cleaning an object to be cleaned by irradiating the object to be cleaned stored in a cleaning tank with ultrasonic waves from the ultrasonic vibrator, the surface of the ultrasonic resonator is protected and A cleaning device characterized in that a vibrator protection cover capable of transmitting ultrasonic waves from an ultrasonic vibrator is attached to a cleaning tank. 2. An ultrasonic transducer is installed inside the cleaning tank,
At the time of cleaning, in a cleaning device for cleaning an object to be cleaned by irradiating the object to be cleaned stored in a cleaning tank with ultrasonic waves from the ultrasonic vibrator, the surface of the ultrasonic resonator is protected and An oscillator protective cover capable of transmitting ultrasonic waves from the ultrasonic oscillator is attached to the cleaning tank, and the oscillator protective cover has a mesh shape of a size capable of transmitting ultrasonic waves and does not corrode with the cleaning liquid. A cleaning device characterized by being formed of a material.