JP3813298B2 - Cleaning method and apparatus for sheet-like object to be cleaned - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for cleaning a sheet or an electronic component formed in a sheet shape (hereinafter referred to as an object to be cleaned) and an apparatus used therefor.
[0002]
[Prior art]
Sheets or objects to be cleaned that are formed in a sheet form are washed on the net-like conveyor, either bare or mounted on a fixture, and showered with cleaning liquid from the top or top and bottom while being transported horizontally. Alternatively, it was mainly cleaned by a method called a batch method in which a plurality of containers were put in a basket or the like and immersed in a cleaning solution to give rocking.
[0003]
[Problems to be solved by the invention]
In the net-like conveyor system, the cleaning liquid can only be relied on the shower because of its structure, and if the shower is strengthened, the object to be cleaned may fall off or be damaged, so a special fixing jig or the like is required.
[0004]
In addition, the cleaning effect of the object to be cleaned having a complicated shape is poor only by the shower described above, and if a fixing jig is used, the fixing jig can be shaded, the cleaning effect is further excluded, and complete cleaning cannot be performed. was there.
[0005]
In addition, in order to perform efficient cleaning by shower, the more the object to be cleaned, the more it is necessary to aim at the necessary place and radiate the cleaning liquid intensively. However, there is a problem in that the object to be cleaned meanders or the net of the cleaning liquid radiates from the lower surface, and the net cannot be radiated accurately at a necessary location.
[0006]
In the batch method, cleaning is mainly performed by rocking, and even if showering or applying ultrasonic waves, cleaning is required for a long time due to the objects to be cleaned or the shadow of the basket. In addition, some electronic components that are objects to be cleaned cannot emit ultrasonic waves for a long time due to their characteristics, and there is a problem that complete cleaning cannot be performed due to this restriction.
[0007]
In addition, even in the case of a net-like conveyor system, even in the batch type, the lack of liquid after washing is bad, and when using a special washing liquid, the liquid is often taken out, the running cost increases, and complete drying is difficult. There was a problem that drying took a long time.
[0008]
Furthermore, not to mention the batch type, it is difficult to attach and detach the object to be cleaned easily or in-line because it is difficult to attach and detach the object to be cleaned even in the net-like conveyor system. There was a problem that it was difficult.
[0009]
In order to solve the above-described problems, the present invention can adopt various cleaning methods by using a transport method that changes to the conventional method, has a good cleaning effect, good liquid drainage, reduces running costs, and is automated. An object of the present invention is to provide a cleaning method and apparatus that can be easily inlined.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention softens the contaminants by performing a loading process in which the object to be cleaned is mounted in a vertical direction on a horizontally moving conveyance device, and preheating with warm and hot air while the object to be cleaned is moved horizontally. And a first shower cleaning process in which the cleaning liquid is sprayed from the shower spray nozzle onto the object to be moved horizontally and the cleaning liquid is also ejected from the reflection side to prevent the posture of the cleaning object from being disturbed. Then, the object to be cleaned is immersed in the cleaning liquid, and during the immersion, the cleaning liquid is sprayed from a large number of cleaning liquid spray nozzles to promote cleaning. A second process for ejecting the cleaning liquid from the cleaning process for applying the ultrasonic vibration and performing the cleaning while preventing the movement posture from collapsing, and the backup injection port facing the shower injection nozzle. A washing process, a liquid draining process for draining liquid by blowing air, a first shower rinsing process for rinsing an object to be cleaned with rinsing water, and a rinsing process for rinsing with rinsing water by means similar to the cleaning process; The second shower rinsing process, the liquid draining process, the shower rinsing process similar to the first shower rinsing process, the liquid draining process, and the object to be cleaned are dried with warm and hot air. The sheet-like object to be cleaned is cleaned by a drying process.
[0011]
In addition, a warm / hot air generator is installed inside the opposing warm / hot air guide wall, and heat retaining walls are provided on both sides of the upper opening of the warm / hot air guide wall to allow the object to be cleaned to pass through. I did it.
[0012]
In addition, a plurality of cleaning liquid injection nozzles that inject several cleaning liquids in the vertical direction are installed in the horizontal direction, and a backup guide having a plurality of backup injection ports in the horizontal direction is provided to eject the cleaning liquid from the back surface of the object to be cleaned. I tried to make it.
[0013]
Furthermore, an immersion liquid tank that is filled with the cleaning liquid and immerses the object to be cleaned is installed inside the outer layer, and a plurality of cleaning liquid nozzles that spray the cleaning liquid onto the object to be cleaned are provided in the immersion cleaning tank in the horizontal direction. A guide pipe is provided, a plurality of backup liquid jets for jetting the cleaning liquid to the object to be cleaned are provided in the opposite position in the horizontal direction, and an ultrasonic vibrator is installed in the immersion cleaning tank to constitute the cleaning apparatus.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
First, the conveying apparatus 1 used for the cleaning means of the present invention will be described. The conveying apparatus 1 includes a moving apparatus 3 that conveys the object to be cleaned 2 and a holding apparatus 4 that holds the object to be cleaned 2.
[0015]
In the holding device 4, slits 7, 8, 9 for attaching holding members 6 for supporting the object to be cleaned 2 in a plurality of rows to a rectangular attachment plate 5 are provided at three positions in the vertical direction. The holding member 6 is formed of a coil spring, and a part of the winding portion 10 is inserted into the center slit 8, and the upper end engaging portion 11 is inserted into the upper slit 7 to be locked to the opposite surface of the mounting plate 5. Then, the holding part 12 at the lower end is inserted into the lower slit 9 and locked to the opposite side.
[0016]
The central slit 8 is inclined according to the winding shape of the holding member 6, and the upper and lower slits 7, 9 are displaced not on the vertical line, so that the upper and lower locking portions 11 and the gripping portion 12 are straightened. Position on the line.
Further, the lower end of the holding portion 12 is positioned in a wide holding slit 13 opened at the lower end provided at the lower end of the mounting plate 5.
The upper ends of the two mounting plates 5 are fixed to one work receiving base 14 with two bolts 15 and 15 respectively.
[0017]
On the other hand, the moving device 3 is constituted by a roller chain 16 and can be moved by driving a sprocket wheel (not shown).
The roller chain 16 holds adjacent rollers 17 and 17 (see FIGS. 1 and 3) with link plates 18 and 18 ′ and connects them with link pins 19. The other adjacent rollers 17 and 17 are connected to the link plates 18 and 18 'so that the link plates 20 and 20' overlap each other. At this time, the fixing portion 21 is formed by projecting so as to form an L shape downward except for the connecting portion of the ring plate 20 ′ located on the lower side.
[0018]
Further, the workpiece receiving base 14 is fixed to one fixing portion 21 via mounting pins 22 and 22 at two positions at the upper center of the center. That is, as shown in FIG. 2, the work receiving base 14 is fixed to the mounting pins 22, 22 with two bolts 23, 23.
On the other hand, the two shafts 24, 24 are positioned on the side opposite to the workpiece receiving base 14 of the fixed portion 21, and the bolts 26 are inserted into the shafts 24, 24 via the washers 2, respectively. The workpiece receiving base 14 is fixed to the fixing portion 21 by inserting the tip 21 into the mounting pins 22 and 22.
In addition, the roller 27 is freely rotated by fitting the roller 27 outside the shafts 24 and 24.
[0019]
Further, guide pins 28 and 28 are provided on the bolts 23 and 23 side of the fixing portions 21 and 21 located on both sides of the fixing portion 21 to which the work receiving base 14 is fixed, and a small diameter is provided at the tips of the guide pins 28 and 28. Protrusions 29 and 29 are provided, and fitting grooves 30 and 30 are horizontally provided on both sides of the work receiving base 14 to insert the projecting parts 29 and 29 (see FIG. 4) to fix the work receiving base 14. ing.
The guide pins 28 and 28 are separated from the workpiece receiving base 14 and are not deformed such as bending when the roller chain 3 is engaged with a sprocket wheel (not shown) and rotates. .
Further, the object to be cleaned 2 is held between the mounting plate 5 and the holding portion 12 of the holding member 6 so as to move in a vertical body.
[0020]
Next, a cleaning device 31 for cleaning the article to be cleaned 2 will be described with reference to FIGS. An immersion cleaning tank 33 is installed inside the large outer tank 32. The immersion cleaning tank 33 is provided with openings 34 and 34 on the front and rear walls in the traveling direction of the article to be cleaned 2 to fill the cleaning liquid.
Then, cleaning liquid supply nozzles 35, 35 are provided on both sides inside the immersion cleaning tank 33, and the cleaning liquid is supplied into the immersion cleaning tank 33 from the immersion cleaning liquid supply ports 36, 36, respectively.
[0021]
Also, an injection liquid guide pipe 37 is provided on one side of the immersion cleaning tank 33 along the traveling direction of the object to be cleaned 2, and both ends are connected to rising pipes 39, 39 connected to the cleaning injection liquid supply ports 38, 38. The cleaning liquid is supplied. A large number of cleaning liquid nozzles 40, 40,...
[0022]
A backup guide 41 is installed at a position facing the riser 39. The backup guide 14 is supported on both sides by brackets 42, 42, and a liquid hole 43 is horizontally provided therein, and a number of backup liquid jet outlets 44, 44, etc. communicating with the liquid hole 43 are opened toward the object to be cleaned 2. ing.
Then, introduction holes 45, 45 communicating with the upper and lower liquid holes 43, 43 are provided at both ends of the upper and lower liquid holes 43 to communicate with the backup liquid guiding pipes 46, 46 and the backup supply ports 47, 47, respectively. The backup liquid is ejected from the ejection ports 59, 59,...
In FIG. 6, 48 and 48 are blind plugs that seal the both ends of the liquid holes 43 and 43.
[0023]
Also, ultrasonic vibrators 49 and 49 are installed on both sides inside the immersion cleaning tank 33 so as to apply ultrasonic vibration to the cleaning liquid.
In FIG. 6, reference numeral 50 denotes a cover of the outer tub 32.
[0024]
Next, the shower apparatus 51 is demonstrated based on FIG. Inside the outer tub 32, a plurality of shower liquid guide pipes 52 are installed vertically along the traveling direction of the article to be cleaned 2, and communicated with each shower liquid supply port 54 provided on the bottom wall 53. Then, shower spray nozzles 55, 55, 55 that open toward the article to be cleaned 2 are provided at three locations in the vertical direction above the shower liquid guide pipes 52.
[0025]
Further, backup means used for the cleaning device 31 is provided at a position facing each shower liquid pipe 52. That is, backup guides 56 that are elongated in the direction of travel of the article to be cleaned 2 are installed on the bottom wall 53 with brackets 57 located on both sides thereof at positions facing the shower spray nozzles 55. The backup guide 56 is provided with liquid holes 58 and 58 horizontally at the top and bottom, and has a large number of backup liquid ejection openings 59 and 59 for ejecting the backup liquid toward the object 2 to be cleaned.
[0026]
In addition, the upper and lower liquid holes 58 and 58 are provided with introduction holes 61 communicating with the backup liquid guiding pipe 60 provided on both sides, and the backup liquid guiding pipe 60 is communicated with the backup liquid supply port 62 attached to the bottom wall 53. The backup liquid is ejected from the backup liquid jets 59, 59,...
[0027]
Next, the preheating device 63 will be described with reference to FIG. 8. A base 64 is provided outside the outer tub 32, and a support plate 65 is fixed to the lower surface of the base 64 so as to pass through the base 64. The generator 66 is supported.
This hot / hot air generator 66 is located inside a cover 67 fixed to the base 64, and provided with hot / hot air guide walls 69, 69 so as to open introduction holes 68 on both sides of the cover 67. The heat retaining walls 70 and 70 are provided opposite to the upper surface of the hot air guiding walls 69 and 69 so as to cover the article 2 to be cleaned.
A temperature sensor 71 located in the vicinity of the warm / hot air generator 66 is attached through the cover 69 and the warm / hot air generator 66.
[0028]
The method of cleaning using the apparatus will be described. In the loading step 72 shown in FIG. 9, a space is provided between the holding portion 12 of the holding member 6 and the mounting plate 5, and the upper end of the object to be cleaned 2 is interposed therebetween. The object to be cleaned 2 is held in a suspended state by the elastic force of the winding part 10 of the holding member 6 between the holding part 12 and the mounting plate 5 of each holding member 6.
One object to be cleaned 2 is held by two mounting plates 5 and 5 as shown in FIG.
Then, after the attachment is completed, the conveying device 1 is horizontally moved intermittently or intermittently and sent to the preheating device 63 that performs the preheating process.
[0029]
In the preheating device 63, air sent from a blower (not shown) is converted into warm air or hot air by a hot / hot air generator 66, adjusted to a suitable temperature by a temperature sensor 71, and the hot air or the like is kept at a heat retaining wall. 70 and 70 to heat the article 2 to be cleaned.
In the preheating device 63, for example, a contaminant such as a flux that has a property of solidifying with time after cooling or with heat is softened and sent to the first shower cleaning step of the next step.
[0030]
In the first shower cleaning step, cleaning is performed by the shower device 51. That is, as shown in FIG. 7, the cleaning liquid is sprayed from the shower liquid spray nozzles 55, 55,... Onto the moving object 2 to be cleaned, and the contaminants softened in the previous process are cleaned and removed. The object to be cleaned 2 having a gap is roughly cleaned.
At the time of this cleaning, a liquid having the same quality as the shower liquid is ejected from the backup liquid jets 59, 59,... To prevent the object to be cleaned 2 from being deformed due to the impact of the shower liquid. To pass smoothly.
In addition, various surfactants are mixed in the cleaning liquid in order to promote the cleaning effect.
[0031]
The object to be cleaned 2 subjected to the rough cleaning is sent to a cleaning process in which immersion and ultrasonic jet cleaning are performed. In this cleaning step, a cleaning device 31 shown in FIGS. 5 and 6 is used.
The object to be cleaned 2 is immersed in the cleaning liquid when passing through the immersion cleaning tank 33 by continuous or intermittent movement of the transport device 1. In the immersion cleaning tank 33, cleaning is performed by spraying the cleaning liquid from the multiple cleaning liquid nozzles 40, 40,... At this time, the cleaning liquid is ejected from the backup liquid jet nozzles 44, 44,..., The cleaning liquid is ejected from the cleaning liquid nozzles 40, 40,. Wash while moving smoothly so that the posture of the body does not collapse.
[0032]
Further, the cleaning effect is further improved by the ultrasonic vibration of the ultrasonic vibrators 49 and 49. Then, the cleaned cleaning liquid overflows from the opening 33 and flows into the outer tank 32, and is collected in a liquid storage tank (not shown) and circulated.
[0033]
In the next second shower step, the same device as the shower device 51 is used, and the same action, that is, the cleaning liquid is sprayed from the shower liquid spray nozzles 55, 55, and ejected from the backup liquid spray ports 59, 59,. With the cleaning liquid, the portion of the object to be cleaned 2 that is difficult to clean is intensively cleaned while preventing the posture of the object to be cleaned 2 from collapsing due to an impact.
[0034]
Further, the object to be cleaned is sent to a liquid draining process 73 of the next process, and liquid draining is performed by blowing air by a blower (not shown) or jetting of compressed air.
[0035]
After draining, it is sent to the first shower rinse step. In this step, a shower rinse device 51 ′ (see FIG. 7) similar to the shower device 51 is used, and the rinse water used for the shower rinse is water that has been heated, preferably pure water. This rinsing water is sprayed from the shower spray nozzles 55, 55... At this time, rinse water is sprayed from the backup jets 59, 59,... Toward the object to be cleaned 2, preventing the object to be cleaned 2 from losing its vertical posture, and smoothly moving vertically to the object to be cleaned 2. It is designed to rinse while letting it go.
[0036]
Then, it is sent to the rinsing apparatus 31 'which is the next rinsing process. The rinsing device 31 ′ is the same device as the cleaning device 31 shown in FIGS. 5 and 6, and will be described using the cleaning device 31.
In this rinsing apparatus 31 ′, when the object to be cleaned 2 is moved continuously or intermittently into the immersion cleaning tank 33 filled with rinsing water and moved in the rinsing water, a large number of cleaning liquid nozzles 40, 40,. Rinse water is sprayed to promote rinsing. At this time, rinse water is ejected from the back-up liquid ejection ports 44, 44,... To prevent the posture of the article to be cleaned 2 from collapsing.
Further, the ultrasonic vibrators 49 and 49 are operated to apply ultrasonic vibrations to the rinse water to improve the rinse effect.
[0037]
Thereafter, the object to be cleaned 2 is sent to the second shower rinsing device 51 ′ which is the second shower rinsing step having the same configuration as the cleaning device 31, and shower rinsing is performed. To the next finishing shower rinse step 51 ′.
[0038]
In the finishing shower rinsing step 51 ″, a shower rinsing device 51 ″ similar to the shower device 51 is used to inject water heated from the shower spray nozzles 55, 55,. The cleaning liquid adhering to the cleaning object 2 is rinsed off.
At this time, rinsing water is ejected from the backup spray ports 59, 59,... To the position opposite to the object to be cleaned 2 to prevent the movement posture of the object 2 to be cleaned.
[0039]
Next, the rinsing water adhering to the object to be cleaned 2 is drained by sending air to the next liquid draining step 73 ″ and sent to the next drying device 63 ′.
[0040]
Since the drying device 63 'is the same device as the preheating device 63, the preheating device 63 (see FIG. 8) will be described.
The object to be cleaned 2 passes between the heat insulation walls 70 and 70 facing each other, and the hot / hot air generated by the hot / hot air generator 66 is blown and dried in the meantime, and is sent to the unloading process 74 of the next process. .
[0041]
In the unloading process, the holding portions 12 of the holding members 6 are opened to form a gap between the holding plate 6 and the object to be cleaned 2 is removed and moved to a predetermined position to complete the cleaning.
[0042]
【The invention's effect】
Since the present invention has the configuration and operation as described above, the preheating device is softened by heating solidified contaminants such as flux, and the cleaning effect by jetting the cleaning liquid is enhanced, thereby completely cleaning in a short time. It is effective as an auxiliary means for performing.
[0043]
In addition, since the shower device injects the cleaning liquid from the shower injection nozzle onto the object to be cleaned in a vertical state, there is almost no shadowed part of the injection, and the cleaning liquid is jetted at a necessary location to enhance the cleaning effect. Can do.
[0044]
Further, during cleaning by spraying, cleaning can be performed while maintaining a vertical state in which the cleaning liquid is ejected from the reflection side to prevent the posture of the object to be cleaned.
[0045]
In the cleaning device, the object to be cleaned is immersed in the cleaning liquid, and in that state, the cleaning liquid is sprayed from the nozzle, and further the cleaning liquid is sprayed from the opposite side to prevent the posture from being collapsed and promote the cleaning effect. By applying vibration, the cleaning effect can be further promoted.
[0046]
Furthermore, since the object to be cleaned is held in a vertical state in the transfer device that horizontally moves all the processes such as the shower process and the cleaning process, there is no shielding other than the gripping part, and cleaning liquid and rinsing water etc. Since it can be sprayed to all locations, it can be efficiently cleaned in a short time and has an excellent effect and is extremely practical.
[0047]
[Brief description of the drawings]
FIG. 1 is a front view of a conveying apparatus according to the present invention. FIG. 2 is a side view with a part thereof cut away.
FIG. 3 is a plan view thereof.
FIG. 4 is a side view showing a relationship between a mounting plate and a guide pin.
FIG. 5 is a plan view in which a part of the cleaning device is cut away.
FIG. 6 is a vertical side view thereof.
FIG. 7 is a side view in which a part of the shower device is cut.
FIG. 8 is a longitudinal sectional view of a preheating device.
FIG. 9 is a schematic diagram showing steps of a cleaning method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyance apparatus 2 To-be-washed object 3 Moving apparatus 4 Holding apparatus 5 Mounting plate 6 Holding member 7 Slit 8 Slit 9 Slit 10 Winding part 11 Locking part 12 Holding part 13 Holding slit 14 Work receiving base 15 Bolt 16 Roller chain 17 Roller 18 Link plate 18 ′ Link plate 19 Link pin 20 Link plate 20 ′ Link plate 21 Fixing portion 22 Mounting pin 23 Bolt 24 Shaft 25 Washer 26 Bolt 27 Roller 28 Guide pin 29 Protruding portion 30 Inserting groove 31 Cleaning device 32 Outer tank 33 Immersion cleaning tank 34 Opening 35 Cleaning liquid supply nozzle 36 Immersion cleaning liquid supply port 37 Injection liquid guide pipe 38 Cleaning injection liquid supply port 39 Rising pipe 40 Cleaning liquid nozzle 41 Backup guide 42 Bracket 43 Liquid hole 44 Backup liquid injection port 45 Introduction hole 46 Backup Liquid conduit 4 7 Backup liquid supply port 48 Blind plug 49 Ultrasonic vibrator 50 Lid 51 Shower device 51 ′ Shower rinse device 51 ″ Shower rinse device 52 Shower liquid lead pipe 53 Bottom wall 54 Shower liquid supply port 55 Shower injection nozzle 56 Backup guide 57 Bracket 58 Liquid hole 59 Backup liquid jet outlet 60 Backup liquid conduit 61 Introduction hole 62 Backup liquid supply port 63 Preheating device 63 ′ Drying device 64 Base 65 Support plate 66 Cover 67 Introduction hole 69 Hot / hot air guide wall 70 Heat retaining wall 71 Temperature sensor 72 Loading process 73 Liquid draining process 73 ′ Liquid draining process 73 ″ Liquid draining process 74 Unloading process

Claims (5)

A loading process in which the object to be cleaned is mounted in a vertical direction on a conveying device that horizontally moves the object to be cleaned; a preheating process in which preheating is performed by warm and hot air while the object to be cleaned is moved horizontally to soften the contaminants; A first shower cleaning step for cleaning the object to be cleaned while injecting the cleaning liquid from the shower spray nozzle onto the horizontally moving object and also ejecting the cleaning liquid from the reflection side to prevent the posture of the object to be lost. Is immersed in the cleaning liquid, and the cleaning liquid is sprayed from a large number of cleaning liquid spray nozzles during the immersion to promote cleaning, and the cleaning liquid is also ejected from the numerous backup jet outlets on the reflection side, and the moving posture of the object to be cleaned is lost. A cleaning process for further applying ultrasonic vibration while preventing the cleaning, a second shower cleaning process for ejecting a cleaning liquid from a backup spray port facing the shower spray nozzle, A liquid draining step for draining liquid, a first shower rinsing step for rinsing an object to be cleaned with rinsing water, a rinsing step for rinsing with rinsing water by means similar to the cleaning step, and a first shower rinsing step A second shower rinsing step, a liquid draining step, a shower rinsing step similar to the first shower rinsing step, a liquid draining step, and a drying step of drying the object to be cleaned with warm and hot air. Cleaning method for sheet-like objects. Install a warm / hot air generator inside the opposing warm / hot air guide wall, and provide heat insulation walls that allow the material to be cleaned to pass on both sides of the upper opening of the warm / hot air guide wall to perform preheating or drying. A preheating device used for the cleaning method characterized by the above. A plurality of cleaning liquid propellant nozzles for spraying several cleaning liquids in the vertical direction are installed in the horizontal direction, and a backup guide having a plurality of backup injection ports in the horizontal direction is provided to eject the cleaning liquid from the back surface of the object to be cleaned. A shower device characterized by that. An immersion cleaning tank that fills the cleaning liquid and immerses the object to be cleaned is installed inside the outer layer, and an injection liquid guide pipe provided with a plurality of cleaning liquid nozzles horizontally in the immersion cleaning tank for injecting the cleaning liquid onto the object to be cleaned A cleaning apparatus comprising: a backup liquid guide pipe provided in a horizontal direction and provided with a plurality of backup liquid ejection ports for ejecting a cleaning liquid to an object to be cleaned at an opposing position. The cleaning apparatus according to claim 4, wherein an ultrasonic vibrator is installed in the immersion cleaning tank.

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