JPH08126872A - Treating device - Google Patents

Abstract

PURPOSE: To prevent nonuniform treatment and defective treatment in cleaning and plating. CONSTITUTION: This treating device 1 is provided with a lifting means 9 for moving a treating basket 14 contg. a material to be cleaned or plated up and down in a processing soln. L. In this case, the descending speed by the lifting means is made >=2 times higher than the ascending speed. Consequently, the material is sufficiently agitated and uniformly treated. In the case of a cleaner using an ultrasonic vibrator 7, plural movements with the descending speed being the same as the ascending speed are combined with at least one vertical movement with the descending speed being >=2 times higher than the ascending speed, hence the defective application of ultrasonic vibration due to the violent fluctuations of the liq. level is not caused, and uniform cleaning is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus for carrying out processing such as cleaning and immersion plating.

[0002]

2. Description of the Related Art Cleaning treatments and plating treatments, which are performed as various treatments on metal parts and the like, are performed by immersing an object to be treated in a treatment liquid. Various devices and methods have been adopted.

As one of the prior arts, as shown in FIG.
The object to be cleaned M is placed in the mesh basket 31 and is placed in the processing tank 3
It is held in a basket receiver 33 that moves up and down in 2 and immersed in the treatment liquid L, ultrasonic waves are generated from an ultrasonic oscillator 34, and cleaning is performed by the action of ultrasonic vibration in the treatment liquid L. . When the frequency of the ultrasonic vibration is constant, as shown in FIG. 3, the vibration stress varies depending on the distance h from the oscillator, and thus uneven cleaning occurs depending on the position where the object to be cleaned is placed. Therefore, in order to eliminate such cleaning unevenness, the ultrasonic action and the vibration stress are uniformly applied to the object to be cleaned by elevating and lowering the car in the treatment liquid by using the elevating means.

Further, in order to prevent the unevenness of cleaning by raising and lowering the mesh cage in order to prevent the vibration stress due to the amplitude, the fundamental frequency of the ultrasonic wave is frequency-modulated so that the vibration stress acts evenly. Has been proposed (Japanese Patent Laid-Open No. 61-101283).

Similarly, in order to eliminate uneven cleaning, it has been proposed to alternately irradiate the object to be cleaned with ultrasonic waves having different frequencies (for example, Japanese Patent Laid-Open No. 58-166973).

[0006]

As described above, the conventional cleaning apparatus is one in which the object to be cleaned is put in the mesh basket and is moved up and down in the cleaning tank to clean the mesh basket. Has the following problems.

Since the bottom surface and all side surfaces of the mesh basket are made of mesh, the liquid flow state when the basket is moved up and down differs depending on the overlapping condition of the objects to be cleaned, which causes uneven cleaning depending on the place. . The objects to be cleaned contained in the mesh basket are likely to collect on the outer periphery of the bottom surface as the treatment basket moves up and down, which causes uneven cleaning and poor cleaning depending on the position of the objects to be cleaned. This also applies to the plating process.

Therefore, an object of the present invention is to provide a processing apparatus which does not cause uneven processing or defective processing in the processing such as cleaning and plating.

[0009]

In order to achieve the above object, the present invention comprises an elevating means for elevating a treatment basket containing an object to be treated such as cleaning or plating in a treatment liquid. The processing device is characterized in that the ascending / descending movement is performed so that the descending speed is twice or more the ascending speed.

Preferably, at least one lifting movement in which the lowering speed is more than twice the rising speed is performed for each of the plurality of lifting movements in which the descending speed and the ascending speed are the same.
Can be combined twice.

[0011]

[Operation] When the processing basket is moved up and down in the processing liquid,
Since the descending speed is twice or more as high as the ascending speed, the object to be processed in the processing car is agitated in a relatively floating state due to inertia when the processing car descends.

[0012] Variable agitation is achieved by combining at least one lifting movement whose descent speed is at least twice the rising speed for each of a plurality of lifting movements having the same descending speed and rising speed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below by taking a cleaning device as a typical example of a processing device. As shown in FIG. 1, the device body 1 includes a base 3 supported by support legs 2.
It is fixed on the top. The outer frame 4 erected on the base 3 has a processing tank portion 4a in the right two-thirds portion and a driving portion 4b in the left third portion. A preliminary tank 4c is provided adjacent to the outer frame 4.

A processing tank 5 made of a stainless steel container is provided in the processing tank portion 4a. A processing liquid (detergent aqueous solution) L is contained in the processing tank 5. An ultrasonic wave generator 7 is attached to the lower surface of the bottom of the processing tank 5 via a flange 6.

The mounting base 8 provided on the side of the drive unit 4b is provided with a linear actuator 9 which is an elevating means. The output rod 9a of the linear actuator 9 is slidably supported by the sleeve 10 fixed to the outer frame 4, and the upper end of the output rod 9a projects from the upper surface of the outer frame. At the protruding portion, the horizontal portion 1 of the elevating arm 11 formed in an L shape is formed.
One end of 1a is fixed. The vertical portion 11b of the elevating arm 11 hangs down from the other end of the horizontal portion 11a, and the lower half portion thereof is immersed in the treatment liquid L in the treatment tank 5. The linear actuator 9 can be controlled in ascending / descending speed and stroke by a control means (not shown).

A holder 12 formed in a ring shape having a predetermined width is fixed to the lower end of the vertical portion 11b of the elevating arm 11. The inner peripheral portion of the holder 12 is in contact with and supports the outer peripheral portion of the car receiver 13. The basket receiver 13 has a bottom portion as much as necessary for holding the treatment basket 14, and an inner portion thereof is removed to form a liquid flow portion 13a. Basket 1
A processing basket 14 containing an object to be processed is installed in the inside 3. The rising portion of the car receiver 13 extends the upper part from a position of approximately two-thirds of the height to facilitate the loading and unloading of the processing car 14, and the car receiver 13 itself is attached to the holder 12 by a fastener (not shown). It is designed to be locked via.

The processing basket 14 is a cleaning basket, and is mainly composed of a meshed basket portion 15 formed in a container shape by a mesh body made of stainless steel wire, and for enhancing the stirring action of the object to be treated. Various components are provided.

The mesh cage portion 15 is a substantially square bottom plate portion 1.
The four sides of 5a are raised at right angles, and the lower end of a tubular portion 15b made of a stainless steel thin plate formed in a tubular shape having a square cross section is fixed to the upper end of the mesh basket portion. Tube part 15
The height of b is about 3 of the rising portion 14c of the mesh basket portion 14
About twice as much.

The upper end of the first liquid flow control plate 16 and the lower end of the second liquid flow control plate 17 are fixed to the lower end of the mesh basket portion 15. Each of the liquid flow control plates 16 and 17 is made of a stainless steel plate having the same thickness as the cylindrical portion 15b. The first liquid flow control plate 16 spreads obliquely downward in a tapered shape, and the second liquid flow control plate 17 spreads obliquely upward in a tapered shape. The upper end of the first liquid flow control plate is fixed to each side of the bottom plate portion of the mesh basket portion 15. Similarly, the lower end portion of the second liquid flow control plate 17 is also fixed to each side of the bottom plate portion of the mesh basket portion 15.

The lower end of the third liquid flow control plate 18 is fixed to the upper end of the tubular portion 15b. Third liquid flow control plate 18
Similarly to the above-described first and second liquid flow control plates 16 and 17, the tubular portion 15b is formed by processing stainless steel of the same material. The third liquid flow control plate 18 is spread obliquely upward in a tapered shape, and the second liquid flow control plate 17 is provided.
It is formed in almost the same shape as.

A top plate 19 is provided at the upper end of the tubular portion 15b, that is, at the lower end of the third liquid flow control plate 18.
The top plate 19 is detachably attached to the top plate 19 by means of engagement pieces (not shown) provided on the four sides of the top plate, and is prevented from falling off by hydraulic pressure during use. The top plate 19 is provided with a plurality of funnel-shaped hollow cylindrical bodies 19a that are tapered downward. The top plate 19 may be appropriately attached and detached according to the property of the object to be processed and the degree of processing. A suspending tool 20 is attached to one of the opposite sides of the fixed sides of the upper end of the tubular portion 15b and the lower end of the third liquid flow control plate 19.

In the spare tank 4a, the replenishing processing liquid L is used.
_O is housed.

Next, the operation will be described. First, the object to be cleaned is put in the processing basket 14, and the top plate 19 is covered to cover the cylindrical portion 15b.
Is fixed to the upper end of the container so as not to come off during the cleaning operation, and then the processing basket 14 is attached to the basket receiver 13 installed in the processing tank 5 through the suspending tool 20. Here, when the ultrasonic wave generator 7 is started and the elevating means 9 is started, the processing basket 14 moves up and down in the processing liquid L, and ultrasonically vibrates the object to be processed.

In FIG. 2, the horizontal axis represents time (t), and the vertical axis represents the elevation position (h) of the processing car 14. The raising / lowering movement of the processing car 14 is a sinusoidal movement in the prior art, but in the present embodiment, as shown in FIG. 2A, the descending speed is set to be twice or more the ascending speed. . As a result, when the processing basket 14 descends, the object to be cleaned in the processing basket has a stirring action.

In the case where the elevation of the elevation means may cause the liquid level to fluctuate greatly and the ultrasonic vibration may not be applied efficiently, as shown in FIG. An appropriate combination of vertical movements such that the lowering speed is twice or more the rising speed for every multiple vertical movements having the same speed and the same rising speed may be interrupted once every three times. .

In addition to the above, in the present embodiment, as described above,
By adding a special device such as a liquid flow control plate to the treatment basket 14, the lifting movement of the treatment basket more effectively exerts the following stirring action on the object to be treated contained in the treatment basket. Is done.

As shown in FIG. 1, first, when the processing car 14 descends, the liquid flow flowing into the processing car from below is accelerated by the first liquid flow control plate 16, and further flows from the surroundings toward the center. Therefore, the objects to be cleaned contained in the mesh basket portion 15 gather in the central portion without staying in the peripheral portion of the bottom surface. In this way, when the processing basket 14 descends by a predetermined amount, this time it reverses and moves up. Then, in addition to the relative liquid flow generated by the rise of the processing basket 14 in the surrounding processing liquid, the second liquid flow control plate 17 causes the mesh basket portion 1
It flows toward 5. Therefore, the liquid flow acting on the object to be cleaned is accelerated, and a high cleaning power is exerted. Also at this time,
Since the liquid flow by the second liquid flow control plate 17 is directed to the center, the objects to be cleaned M are collected at the center. During the upward movement of the processing car 1, the liquid above the processing car 1 is further gathered by the third liquid flow control plate 18 and sent to the mesh car part 15, so that the speed of the liquid flow is increased, The cleaning ability is increased accordingly.

In the case where the top plate 20 is further provided, the processing liquid L collected by the third liquid flow control plate 18 is collected.
However, since the hollow tubular body 19a causes a concentrated liquid flow at several places, a high-speed liquid flow is exerted on the objects to be overlapped in the mesh basket portion 15 to separate them, which enables uniform cleaning. There is.

After the elevating and lowering motions have been performed a predetermined number of times, the processing car 14 is pulled up by the suspending tool 20, and the next processing car is fed to perform the same process.

In this embodiment, a linear actuator is used as the elevating means, but the elevating means may be another type such as a hydraulic cylinder or a cam type, and is not particularly limited. Further, although the object to be processed is the object to be cleaned and the processing device is the cleaning device in the present embodiment, the present invention is not limited to this, and can be applied to a processing device for performing other processing such as plating processing. is there.

[0031]

According to the present invention, since the descending speed of the ascending / descending movement of the processing car in the processing liquid is more than twice the ascending speed, the object to be processed in the processing car when the processing car descends. Is easily floated, and the stirring is effectively performed, so that it is possible to perform processing without unevenness in processing such as cleaning and plating.

Further, if a combination of lifting and lowering motions in which the lowering speed is more than twice the rising speed is combined at least once for a plurality of lifting and lowering motions in which the lowering speed and the ascending speed are the same, it is applied to the ultrasonic cleaning apparatus. In this case, it is possible to perform uniform cleaning without lowering the ultrasonic action.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a processing apparatus according to an embodiment of the present invention.

FIG. 2 is a curve diagram showing a vertical movement of a processing car.

FIG. 3 is an explanatory diagram showing a distribution state of vibration stress generated by an ultrasonic wave generation device according to a conventional technique.

FIG. 4 is an explanatory view showing a raising / lowering motion of a processing car according to a conventional technique.

[Explanation of symbols]

 9 Elevating means 14 Treatment basket L Treatment liquid

Claims (2)

[Claims] 1. A processing apparatus comprising a raising / lowering means for raising / lowering a treatment basket containing an object to be treated such as cleaning or plating in a treatment liquid, wherein the raising / lowering movement has a lowering speed of an ascending speed. A processing device characterized by being more than doubled. 2. The lifting / lowering motion according to claim 1, wherein the lifting / lowering motion is performed at least once for each of a plurality of lifting / lowering motions in which the descending speed and the ascending speed are the same. A processing device characterized by being combined.