JPH0747151B2 - Cleaning method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for efficiently cleaning (and drying) plate-shaped electronic parts, mechanical parts and the like with a liquid cleaning agent such as a hydrocarbon type cleaning agent.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
As an industrial cleaning agent for cleaning electronic parts and mechanical parts, a chlorofluorocarbon-based cleaning agent and a chlorine-based solvent such as trichloroethane have been used. However, these industrial cleaning agents have a problem that they cause destruction of the ozone layer, pollution of groundwater, and deterioration of working environment, and their use is being regulated.

Therefore, a cleaning method has been proposed in which a liquid cleaning agent such as a hydrocarbon-based cleaning agent is used as a cleaning agent other than a chlorofluorocarbon-based cleaning agent or a chlorine-based solvent such as trichloroethane.

However, when a plurality of plate-shaped electronic parts (plate-shaped cleaning objects) are stacked and washed at once by using a liquid cleaning agent such as a hydrocarbon type cleaning agent, the plate-shaped electronic parts are wet with the liquid cleaning agent. Even if the objects to be cleaned are attached (adhered) to each other and the cleaning jigs that hold the objects to be cleaned are tilted or swung, the objects to be cleaned can be easily separated (peeled) from each other. Therefore, there is a problem in that the contact surface cannot be sufficiently washed, and there is also a problem in that drying is hindered in the drying step after washing.

The present invention solves the above problems and provides a cleaning method capable of efficiently cleaning (and drying) a plate-like object to be cleaned with a liquid cleaning agent such as a hydrocarbon-based cleaning agent. The purpose is to do.

[0006]

In order to achieve the above object, the cleaning method of the first invention of the present application is constructed so that the plate-shaped cleaning object can be tilted in a predetermined direction while being held. The holding recess of the cleaning jig for holding the plate-like object to be cleaned is configured in such a shape that its width becomes wider as it approaches the opening, and a plurality of plate-like objects to be cleaned are attached to one side end portion. Is held in the holding recess such that it abuts the bottom of the holding recess, is immersed in a liquid cleaning agent such as a hydrocarbon-based cleaning agent, and the cleaning jig is repeatedly tilted at a predetermined angle to form a plate shape. It is characterized in that the object to be cleaned is rocked for cleaning.

The cleaning method of the second invention of the present application includes a cleaning step of cleaning the plate-shaped cleaning object by the cleaning method,
After completion of the cleaning step, the plate-like object to be cleaned is taken out of the liquid cleaning agent such as a hydrocarbon-based cleaning agent while being held on the cleaning jig, and the cleaning jig is repeated at a predetermined angle in an air stream or the like. And a drying step of performing drying while tilting.

Further, the plate-like cleaning object has a step portion,
In the cleaning step or the drying step, when the plate-like objects to be cleaned come into close contact with each other by the step portions of the plate-like objects to be cleaned being brought into close contact with each other, holes or holes formed in the plate-like objects to be cleaned or An engaging portion such as a notch is engaged with an operation restricting member for preventing the plate-like cleaning object from coming into close contact with each other by engaging the step portions, and the cleaning jig is repeated at a predetermined angle. It is characterized in that washing or drying is performed while tilting.

[0009]

A plurality of plate-like objects to be cleaned are held in a holding recess formed into a shape whose width becomes wider as it approaches the opening, with one side end contacting the bottom of the holding recess. In the stationary state, even if adjacent plate-like objects to be cleaned are in close contact with each other, the adjacent plate-like objects to be cleaned are separated every time the cleaning jig is tilted during cleaning (during drying). (Peel off). Therefore, by repeatedly inclining the cleaning jig at a predetermined angle, the plate-like cleaning target including the contact surface can be cleaned (and dried) sufficiently and efficiently.

Further, the plate-like object to be cleaned is brought into close contact with the engaging parts such as holes and notches formed in each plate-like object to be cleaned by engaging the stepped parts such as metal rods with each other. Even if a plate-like object to be cleaned has a stepped portion, it is possible to prevent the plate-like objects to be intimately contacted with each other by engaging a motion regulating member for preventing the cleaning. And, it becomes possible to perform the drying efficiently.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a main part thereof.

In this embodiment, as shown in FIGS. 1 and 2, two rectangular frames 1 made of stainless steel are arranged substantially parallel to each other from one side to the other side.
A jig (cleaning treatment) formed by forming tapered holding recesses 3 at a plurality of positions of the book supporting members (strip-shaped members) 2a and 2b facing each other such that the width becomes wider as the opening approaches. 5) is used. Although not shown in particular, a wire mesh is attached to the bottom surface of the frame 1 so that the plate-like cleaning target 4 does not drop. Further, the cleaning jig 5 is connected to a predetermined driving means (not shown) so that it can be repeatedly tilted at a predetermined angle (angle θ with respect to the horizontal line H).

A thin plate-shaped cleaning target (plate-shaped cleaning target) is placed in the holding recess 3 formed at the position where the supporting members 2a, 2b of the cleaning jig 5 configured as described above face each other. ) Inserting a plurality of stacked four sheets 4 and holding them in such a manner that one side end portion (longitudinal side end portion) 4a contacts the bottom side 3a of the holding recessed portion 3 (FIG. 1). Note that the cleaning target 4
In the case where the position is displaced in the longitudinal direction to cause a problem, a frame body having a small size is used so that the gap between the inner peripheral surface of the frame body 1 and the end of the cleaning object 4 in the longitudinal direction becomes small. By using it, it is possible to configure the inner peripheral surface of the frame 1 as a contact surface.

Then, the plate-like object 4 to be cleaned is cleaned with a cleaning jig 5.
The cleaning jig 5 is immersed in a hydrocarbon-based cleaning agent (for example, ACTREL (registered trademark) manufactured by Exxon Corporation) while being held at 1, and cleaning is performed while the cleaning jig 5 is repeatedly tilted at a predetermined angle by a driving unit.

At this time, the plate-like objects to be cleaned 4 that are in close contact with each other gradually start to incline as the cleaning jig 5 is tilted to one side, and finally the plates that are in close contact The strip-shaped cleaning target 4 falls off in the opposite direction while peeling off, and finally all the plate-shaped cleaning targets 4 fall in the reverse direction. After that, when the cleaning jig 5 is tilted in the opposite direction by the driving means, the plate-like cleaning object 4 is peeled and falls in that direction in the same manner as described above, and finally all the plate-like cleaning objects 4 are removed. Fall in that direction. In this way, by repeatedly tilting the cleaning jig 5, the plate-shaped cleaning target 4 (including the contact surface) can be efficiently cleaned. The cleaning efficiency can be further improved by performing the cleaning step separately in each step such as preliminary cleaning, rough cleaning, intermediate cleaning, and precise cleaning.

After the predetermined cleaning process is completed, the plate-shaped cleaning object 4 is taken out of the hydrocarbon-based cleaning agent while being held by the cleaning jig 5, and is flowed in an air stream (for example, heated air is flown). Dry in a dryer). Also in this drying step, the cleaning jig 5 is repeatedly tilted at a predetermined angle by the driving means to perform drying. As a result, the plate-like cleaning objects 4 that are in close contact with each other are peeled off when the cleaning jig 5 is tilted, and the contact surface with the adjacent plate-like cleaning object 4 is quickly dried.

In the above embodiment, the case where the cleaning jig 5 in which the holding recess 3 is formed in the supporting members 2a and 2b arranged on the rectangular frame 1 is used has been described. The structure of the tool is not limited to this. For example, it is possible to use a cleaning jig in which a holding recess having a predetermined shape is formed on a plate-shaped member, and it is also possible to configure it in another shape. .

Further, the specific shape of the holding recess 3 (width A of the bottom side of the holding recess 3 shown in FIG. 2, length B of a side having a predetermined taper (angle D with respect to the perpendicular), and plate-like cleaning object 4 are set. There is no particular restriction on the size of the gap C when held, etc., and a preferable structure and shape can be appropriately selected in consideration of the shape of the plate-like cleaning target 4. In addition, although the case where a hydrocarbon-based cleaning agent is used has been described in the above embodiment, the cleaning method of the present invention is not limited to the hydrocarbon-based cleaning agent, and other liquid cleaning agents can be used.

FIG. 3 shows another embodiment of the present invention, in which a plate-like cleaning object 14 having step portions is formed.
It is a figure which shows the method of cleaning (FIG. 4).

That is, as shown in FIG. 4, when cleaning the plate-like cleaning object 14 having the step portion 15, if a plurality of plate-like cleaning objects 14 are stacked, each plate-like cleaning object is washed as shown in FIG. In some cases, the stepped portion 15 of the target object 14 is engaged and the adjacent plate-shaped cleaning target objects 14 are brought into close contact with each other, and the close contact state cannot be eliminated even by the method of the present invention.

In this embodiment, as shown in FIG. 3, a through hole (engagement portion) 16 formed in the plate-like cleaning object 14 (for example, a transport provided for supplying each step in the manufacturing process) Bar-shaped member (motion restriction member) for the pitch hole)
17 is inserted for cleaning and drying.

Thus, the rod-shaped member (motion restricting member)
By using 17, the stepped portions 15 of each plate-like cleaning object 14 are securely prevented from being brought into contact with each other and the adjacent plate-like cleaning object 14 is firmly adhered to each other, and the plate-shaped stepped portion 15 is formed. It is possible to efficiently clean and dry the cleaning object 14.

In this embodiment, the movement restricting member 17
Is inserted into the through hole (engagement portion) 16 of the plate-like cleaning object 14,
Although the case where they are engaged has been described, the engaging portion that engages the motion restricting member is not limited to the through hole as in the above-described embodiment, but may be used for engaging a notch or other motion restricting member. It is possible to use a site having various suitable shapes as the engaging portion.

Further, the operation regulating member is not limited to the simple rod-shaped member as in the above-mentioned embodiment, but may be formed in various shapes in consideration of the shape of the plate-like cleaning object.

[0025]

As described above, according to the cleaning method of the first invention of the present application, the holding recess of the cleaning jig is formed in a shape such that its width becomes wider as it approaches the opening, and a plurality of plate-like cleanings are performed. A liquid cleaning agent such as a hydrocarbon-based cleaning agent that holds an object in the holding recess in such a manner that one side end of the object contacts the bottom of the holding recess, and repeatedly tilts the cleaning jig at a predetermined angle. Since the conventional cleaning method makes it difficult to sufficiently adhere to each other with the conventional cleaning method, it is possible to efficiently use a liquid cleaning agent such as a hydrocarbon-based cleaning agent for the plate-shaped cleaning target. Can be washed.

In the method of the second invention of the present application, after cleaning by the above method, the plate-like object to be cleaned is held in a cleaning jig and taken out from a liquid cleaning agent such as a hydrocarbon-based cleaning agent. Since it has a step of drying while repeatedly tilting the cleaning jig at a predetermined angle in the air flow,
Both the cleaning and the drying of the plate-shaped cleaning target can be efficiently performed.

Further, a motion regulating member is engaged with an engaging portion such as a hole or a notch formed in each plate-like object to be cleaned, and the cleaning jig is repeatedly inclined or tilted at a predetermined angle for cleaning or drying. By doing so, even when a step is formed on the plate-like object to be cleaned, it is possible to prevent the plate-like object to be adhered from adhering and to efficiently perform the cleaning and drying. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a cleaning method according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part showing a cleaning method according to an embodiment of the present invention.

FIG. 3 is a side sectional view showing a cleaning method according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a plate-shaped cleaning target having a step portion.

FIG. 5 is a side view showing a state where a plurality of plate-like objects to be cleaned having a step portion are in close contact with each other.

[Description of Reference Signs] 1 frame 2a, 2b support member (strip-shaped member) 3 holding recess 3a bottom of holding recess 4,14 plate-shaped cleaning target 4a one side end of plate-shaped cleaning target 5 cleaning jig 15 Step portion 16 Through hole (engagement portion) 17 Movement restricting member

Continuation of front page (56) Reference JP-A-63-47934 (JP, A) JP-A-51-51162 (JP, A) JP-A-2-156531 (JP, A) JP-A-2-115398 (JP , A) Actually open 2-121726 (JP, U) Actually open 48-19376 (JP, U) Actually open 50-98021 (JP, U) Actually open 58-31272 (JP, U) JP 62-44424 (JP, B2) JP-B 50-16299 (JP, B2) JP-B 57-6982 (JP, B2) JP-B 47-23063 (JP, Y2)

Claims (3)

[Claims] 1. A holding recess for holding a plate-shaped object to be cleaned of a cleaning jig configured to be tiltable in a predetermined direction while holding the plate-shaped object to be cleaned is provided in the opening. The width of the hydrocarbon-based material is configured to increase as it approaches, and a plurality of plate-shaped objects to be cleaned are held in the holding recess in such a manner that one side end of the object to be cleaned abuts the bottom of the holding recess. A cleaning method characterized by immersing in a liquid cleaning agent such as a cleaning agent and tilting the cleaning jig repeatedly at a predetermined angle to rock and wash the plate-shaped cleaning target. 2. A cleaning process for cleaning a plate-shaped cleaning object by the cleaning method according to claim 1, and a hydrocarbon-based cleaning in a state where the plate-shaped cleaning object is held by a cleaning jig after the cleaning process is completed. And a drying step of performing drying while taking out from a liquid cleaning agent such as a cleaning agent and repeatedly tilting the cleaning jig at a predetermined angle in an air stream or the like. 3. The plate-like cleaning object has a step portion, and in the cleaning step or the drying step, a plurality of plate-like object objects are engaged with each other so that adjacent plate-like cleaning objects come into close contact with each other. In order to prevent the plate-like object to be cleaned from coming into close contact with each other, the stepped parts are engaged with each other at the engaging portion such as the hole or notch formed in each plate-like object to be cleaned in the state of The cleaning method according to claim 1 or 2, wherein an operation regulating member is engaged, and cleaning or drying is performed while repeatedly inclining the cleaning jig at a predetermined angle.