JP2012035193A - Cleaning device and cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device capable of enhancing cleaning efficiency and usable for partial cleaning of a cleaning target by using a technique for separating dirt adhered to the cleaning target by making laminas functioning as cleaning media which are lightweight and easily fly flow by an air current.SOLUTION: By periodically fluctuating negative pressure within a cleaning tank, adsorption force of the cleaning media to a cleaning medium separation means is changed periodically, and thus, is weakened, so as to increase flexibility of movement of the cleaning media.

Description

  The present invention relates to a cleaning apparatus that removes a fixed object attached to an object to be cleaned, for example, a cleaning apparatus that removes flux attached to a mask jig such as a dip pallet or a carrier pallet used in a flow solder bath process. About.

In recent years, a jig for masking a region other than a region to be soldered is frequently used in a soldering process using a flow solder tank in printed circuit board manufacturing.
Such a mask jig (called a dip pallet or a carrier pallet) had to be cleaned regularly in order to reduce the accuracy of the mask by accumulating and fixing flux on the surface as it was repeatedly used. .

Conventionally, since such cleaning is generally performed by immersing in a solvent, a large amount of the solvent is consumed, and the cost and the burden on the worker are extremely large.
Further, as described in Patent Document 1, a device for injecting a solvent onto an object to be cleaned in the device has been developed, but the problem of using a large amount of the solvent has not been solved.

  Regarding the cleaning as described above, the applicant has proposed a technique for removing fixed dirt by a cleaning method using a flaky cleaning medium.

  For example, as described in Patent Document 2, an air current is generated in the cleaning tank, and a thin piece, which is a lightweight and easy-to-fly cleaning medium, is caused to flow by a high-speed air current in the cleaning tank, so that the cleaning medium becomes an object to be cleaned. We have proposed a technology that separates dirt that has collided continuously and adheres.

  In this technique, particularly when a flaky cleaning medium having flexibility is used, the cleaning medium is easily accelerated by the air flow, and strong collision energy is obtained.

  Also, as described in Patent Document 3, a cleaning medium accelerating means, a cleaning medium separating means, and a cleaning medium leakage preventing means are provided, and a technique for efficiently cleaning a planar cleaning object with the cleaning tank in a semi-open state is proposed. is doing.

  There are many openings in the mask jig, and if adhesion dirt remains in the vicinity of the opening, the degree of adhesion of the mask jig decreases, and solder and flux are on the back side of the mask jig. Since it leaks to the surface on the base side to be soldered (hereinafter referred to as the side surface of the base), the ability to remove fixed dirt in the vicinity of the opening is the most important.

  However, in the technique described in Patent Document 2 or Patent Document 3, the cleaning medium collides with the surface facing the cleaning tank, and the apparatus corresponds to the removal of the flux leaking to the side surface of the base. Was not enough.

  For such a problem, as a generally considered method, first, after cleaning the surface of the mask jig, which is a surface to which a large amount of solder or flux adheres (hereinafter referred to as a soldering surface), It is conceivable to use a sand blast gun for the dry type and a water jet for the wet type, and locally spray a cleaning medium such as water or particles to clean the leaked flux on the side of the substrate.

  In addition, when this sandblast gun or water jet is used locally, scattering of cleaning media such as water and particles becomes a problem, but as a countermeasure to this, a casing sucked under negative pressure around the blast Generally, a method of sucking a cleaning medium such as water or particles scattered by disposing of is used.

  For example, in Patent Document 4, when water jet is wiped to the object to be cleaned inside the negative pressure casing, and the casing is separated from the object to be cleaned, the water jet valve quickly closes due to fluctuations in the internal pressure of the casing, and the water scattered. A technique for sucking water and preventing water from leaking outside is described.

  Patent Document 5 describes a blast head that uses abrasive grains. In order to keep the negative pressure in the blast head constant and weak, an air intake is provided, and the air intake is opened and closed according to the pressure difference. The technology to do is described.

JP-A-5-299821 JP 2007-029945 A JP 2009-226394 A JP 2004-299042 A Japanese National Patent Publication No. 11-514938

  However, when this sandblast gun or water jet is used, there is a problem that, due to its principle, processing steps such as recovery and cleaning of the cleaning medium and cleaning liquid after cleaning are costly.

  On the other hand, the present invention can improve the cleaning efficiency by using the technology of separating the dirt adhering to the object to be cleaned by flowing the flakes, which are the above-mentioned lightweight and easy-to-fly cleaning media, by the air flow. It aims at providing the washing | cleaning apparatus which can be used also for wash | cleaning a target object partially.

  The features of the present invention as means for solving the above-described problems are as follows.

The cleaning device of the present invention is a cleaning device that accelerates a laminar cleaning medium by an air flow and collides with an object to be cleaned, and includes a cleaning tank having an opening and a cleaning medium provided in the cleaning tank. A cleaning medium separating means for blocking, a gas inflow means for allowing gas to flow into the cleaning tank, and a suction means for sucking the gas in the cleaning tank through the cleaning medium separating means to make the inside of the cleaning tank have a negative pressure And a cleaning apparatus comprising cleaning medium acceleration means for accelerating the cleaning medium toward the opening,
In the state where the object to be cleaned is in contact with the opening, negative pressure changing means for periodically changing the negative pressure in the cleaning tank is provided.

  The cleaning apparatus of the present invention is further characterized in that the negative pressure fluctuation by the negative pressure fluctuation means is a fluctuation that weakens the adsorption force of the cleaning medium to the cleaning medium separation means.

  The cleaning apparatus of the present invention is further characterized in that the fluctuation of the negative pressure by the negative pressure fluctuation means is a fluctuation that enhances the acceleration of the cleaning medium by the cleaning medium acceleration means.

  The cleaning apparatus of the present invention is further characterized in that the negative pressure fluctuation by the negative pressure fluctuation means is a fluctuation that weakens the adsorption force of the cleaning medium to the cleaning medium separation means and increases the acceleration of the cleaning medium acceleration means.

  The cleaning apparatus of the present invention is further characterized in that the negative pressure fluctuation means is a gas inflow means provided with an on-off valve.

  The cleaning apparatus of the present invention further closes the on-off valve to weaken the adsorption force of the cleaning medium to the cleaning medium separating means and increases the negative pressure in the cleaning tank. Thus, the cleaning medium is accelerated and the negative pressure in the cleaning tank is reduced.

  The cleaning device of the present invention is a cleaning device that accelerates a laminar cleaning medium by an air flow and collides with an object to be cleaned, and includes a cleaning tank having an opening and a cleaning medium provided in the cleaning tank. A cleaning medium separating means for blocking, a gas inflow means for allowing gas to flow into the cleaning tank, a suction means for sucking the gas in the cleaning tank through the cleaning medium separating means, and toward the opening. A cleaning apparatus including cleaning medium acceleration means for accelerating the cleaning medium, wherein the size of the gas flow in the direction of the cleaning medium separating means in the cleaning tank is periodically changed in a state where the object to be cleaned is in contact with the opening. It is characterized by comprising gas flow fluctuation means for fluctuating the gas flow.

  The cleaning device of the present invention is further characterized in that the fluctuation caused by the gas flow fluctuation means is formed by a fluctuation of a difference between the magnitude of the gas flow introduced by the gas inflow means and the magnitude of the gas flow sucked by the suction means. And

  The cleaning apparatus of the present invention is further characterized in that the gas flow fluctuation means is gas inflow means having an on-off valve.

  The cleaning apparatus of the present invention is further characterized in that the cleaning medium accelerating means is gas inflow means for allowing gas to flow into the cleaning tank in the direction of the opening.

  In the cleaning apparatus of the present invention, the gas inflow means is tubular, one end faces the opening of the cleaning tank, and the other end opens to the outside of the cleaning tank. It is characterized by.

  The cleaning apparatus of the present invention further includes two or more cleaning tanks and cleaning medium separating means capable of independently controlling the suction state, and gas inflow means is disposed between the plurality of cleaning tanks. .

  The cleaning apparatus of the present invention further includes an air flow generating means for generating an air flow along the surface of the cleaning medium separating means.

  The cleaning apparatus of the present invention is further characterized in that the air flow along the surface of the cleaning medium separating means is a swirling flow.

  In the cleaning apparatus of the present invention, the cleaning tank has a cylindrical shape, cleaning medium separating means is disposed on the cylindrical bottom surface, swirl flow generating means and an opening are provided on the side surface near the bottom surface, The flow generating means has an on-off valve.

  In the cleaning apparatus of the present invention, the cleaning tank has a conical shape, the cleaning medium separating means is disposed on the bottom surface of the cone, the swirling flow generating means and the opening are provided on the side surface near the bottom surface of the cone, The flow generating means has an on-off valve.

  The cleaning apparatus of the present invention is further characterized in that the opening can be brought into contact with the cleaning portion of the object to be cleaned while holding the cleaning tank in hand.

  The cleaning method of the present invention is a cleaning method using any one of the above-described cleaning apparatuses, wherein the opening of the cleaning tank is pressed against an object to be cleaned, and the on-off valve of the gas inflow means of the cleaning apparatus is periodically It is characterized by opening and closing.

  According to the present invention, the negative pressure in the cleaning tank is periodically changed in the technique of separating the dirt adhering to the object to be cleaned by flowing the flakes as the cleaning medium by an air flow. The adsorption force to the separation means changes periodically, the adsorption force of the cleaning medium to the cleaning medium separation means periodically decreases, and the degree of freedom of movement of the cleaning medium increases, so that the washing efficiency can be increased and the washing It can also be used to partially clean an object.

Horizontal sectional view and vertical sectional view showing the configuration of the apparatus of the first embodiment Vertical sectional view for explaining the operation of the first embodiment Vertical sectional view showing the configuration of the apparatus of the second embodiment and an end view of the opening Vertical sectional view for explaining the operation of the second embodiment Horizontal sectional view and vertical sectional view showing the configuration of the apparatus of the third embodiment Vertical sectional view for explaining the operation of the third embodiment Horizontal sectional view and vertical sectional view showing the configuration of the apparatus of the fourth embodiment Horizontal sectional view and vertical sectional view for explaining the operation of the fourth embodiment The perspective view which shows the modification of 4th Embodiment Horizontal sectional view and vertical sectional view showing a modification of the fourth embodiment The perspective view which shows the usage example of the apparatus of 4th Embodiment.

  An embodiment of the present invention will be described.

  FIGS. 1 and 2 show a first embodiment, and FIGS. 1A and 1B are a horizontal sectional view and a vertical sectional view showing the configuration of the apparatus, respectively. 2A and 2B are vertical sectional views for explaining the operation.

1 and 2, the cleaning tank 3 has an inverted conical shape, and a cleaning medium separating means 4 made of punching metal is disposed on the upper surface of the cleaning tank 3 corresponding to the bottom of the cone.
A suction duct 5 is provided on the upper surface of the cleaning tank 3 via a cleaning medium separating means 4.
A suction port 6 is formed in the suction duct 5, and a suction machine 7 is connected to the suction port 6.
A circular opening 8 is provided on the lower surface of the cleaning tank 3 on the side opposite to the cleaning medium separating means 4.

Reference numeral 2 denotes a cleaning medium, which is a thin piece having an area of 1 to 100 mm ² . The material of the cleaning medium 2 is a film made of a durable material such as polycarbonate, polyethylene terephthalate, acrylic, or cellulose resin, and has a thickness of 0.05 to 0.2 mm.
In some cases, it is effective to change the thickness, size, and material of the cleaning medium 2 depending on the object to be cleaned 1. In the present invention, conditions other than the conditions of the cleaning medium 2 can be used.
The cleaning medium separating means 4 is a member having a large number of apertures that can separate the dust adhered to the cleaning medium 2,
Although punching metal is used in the present embodiment, a metal net or a molded net member may be used.

  The reason why the cleaning tank 3 is formed in an inverted conical shape is that an air flow sufficient to prevent the cleaning medium 2 from leaking out of the cleaning tank 3 is generated in the vicinity of the opening 8 and the area of the cleaning medium separating means 4 is increased. This is because the cleaning medium 2 covers the cleaning medium separating means 4 so as to prevent clogging. The cleaning medium separating means 4 is not clogged if it has an area larger than the total area of the cleaning medium 2 generally used.

The opening 8 has an area corresponding to the suction flow rate of the suction device 7 so that the opening 8 has an area that is approximately five times as large as the size of the cleaning medium 2 and has a flow rate at which the cleaning medium 2 can be sucked in at the time of suction.
As shown in FIG. 2, the opening 8 is in contact with the surface to be cleaned of the object 1 to be cleaned, and in order to improve the adhesion to the object 1 to be cleaned, a sponge, rubber, brush, film is formed around the opening 8. A flexible material that follows the shape of the object 1 to be cleaned may be disposed.

On the central axis of the opening 8 that is the central axis of the inverted cone, an air flow introduction pipe 9 is provided as a gas inflow means through the cleaning medium separating means 4 and the suction duct 5.
One end of the airflow introduction tube 9 is arranged at a position separated from the surface of the opening 8 by more than the width of the lamellar cleaning medium 2. The other end of the airflow introduction tube 9 is open to the outside air.

  An opening / closing butterfly valve 10 is provided in the air flow introduction pipe 9 and can be opened / closed by a control signal from a control unit (not shown). Although the butterfly valve 10 is used in the present embodiment, an on-off valve such as a piston valve or a ball valve may be used.

  Next, the operation of the cleaning apparatus and the movement of the cleaning medium will be described with reference to FIG.

First, the cleaning medium 2 is put into the cleaning tank 3. When the opening 8 is brought close to the cleaning medium 2 and the suction machine 7 is operated, an amount of the cleaning medium 2 corresponding to the area of the cleaning medium separating means 4 is adsorbed. it can.
While the suction machine 7 is in operation, the cleaning medium 2 is adsorbed on the cleaning medium separating means 4 and therefore is not scattered outside the cleaning tank 3.

Next, as shown in FIG. 2A, when the valve 8 of the airflow introduction pipe 9 is closed and the opening 8 of the cleaning tank 3 is pressed downward against the object 1 to be cleaned, the cleaning tank 3 is A closed space is formed by the object 1 to be cleaned, and a negative pressure is generated in the closed space.
When the pressure in the cleaning tank 3 becomes negative and the differential pressure with the suction duct 5 decreases, the airflow passing through the cleaning medium separating means 4 becomes very small, so that the adsorptive power of the cleaning medium 2 decreases, and the cleaning medium 2 becomes the cleaning medium. It leaves | separates from the isolation | separation means 4, and falls and moves to the opening part 8 direction according to gravity.

  At this time, when the butterfly valve 10 of the airflow introduction tube 9 is opened as shown in FIG. 2B, the airflow flows from the outside of the cleaning tank 3 into the cleaning tank 3 due to the pressure difference between the inside of the cleaning tank 3 and the outside air. .

Further, due to the entrainment of the air flow, an air flow is also generated around the air flow introduction tube 9 in the direction of the opening 8, that is, in the direction of the cleaning object 1.
At this time, it is accelerated by the air flow generated by the cleaning medium 2 that has moved at the tip or the periphery of the air flow introduction tube 9, collides with the cleaning target object 1, and the foreign matter on the surface of the cleaning target object 1 is removed.
After the collision, the cleaning medium 2 rises along the air flow toward the cleaning medium separating means 4 at a position away from the air flow introduction tube 9 and is again adsorbed by the cleaning medium separating means 4.
At this time, dust, foreign matter and the like adhering to the cleaning medium 2 are separated and collected by the suction device 7. When many of the floating cleaning media 2 are adsorbed, the butterfly valve is closed again to move the cleaning media 2 downward as shown in (A).

  By opening and closing the butterfly valve at a short cycle and repeating such a process, the cleaning medium 2 can repeatedly collide with the object 1 to be cleaned, and foreign matter can be removed.

  In this manner, the cleaning object 1 is cleaned. In this process, the magnitude of the airflow in the cleaning tank 3 in the direction of the cleaning medium separating means 4 changes periodically. Here, the magnitude of the airflow indicates the amount of airflow, the speed of the airflow, and the like, and indicates that the adsorption force of the cleaning medium 2 to the cleaning medium separating means 4 changes due to the change.

  Since the inside of the cleaning tank 3 is always at a negative pressure even if it fluctuates, the cleaning medium 2 and the removed foreign matter are not leaked outside the cleaning tank 3. Further, at the moment when the cleaning tank 3 opening 8 is separated from the object 1 to be cleaned, the airflow flows from the opening 8 due to the vacuum break, while the inflowing air from the airflow introduction pipe 9 is stopped. It is sucked and does not leak to the outside, and is all adsorbed by the cleaning medium separating means 4.

  By such operation of the apparatus, the cleaning medium 2 can collide with the object 1 to be cleaned only by driving the suction machine 7 and the butterfly valve 10, and the cleaning medium 2 does not leak out of the cleaning tank 3. is there. Since compressed air is not used, the device can be made light and at low cost.

  In this first embodiment, by periodically varying the magnitude of the gas flow in the direction of the cleaning medium separating means, the cleaning medium adsorbed and staying on the cleaning medium separating means is reduced again by the weakening of the adsorbing force. The inside of the washing tank can be moved, and the clogging of the washing medium separating means can be prevented without reducing the suction force.

In addition, by providing an air flow introduction pipe provided with an on-off valve, the magnitude of the gas flow in the direction of the cleaning medium separating means can be varied with a simple configuration.
Further, when the inside of the cleaning tank is negative and the on-off valve is open, the airflow flowing from the outside of the cleaning tank is directed to the opening, so that a passive cleaning medium accelerated airflow is obtained. In such a configuration, the cleaning medium accelerating air flow stops at the moment when the object to be cleaned is separated from the opening and the vacuum is broken, so that the cleaning medium can be prevented from leaking from the opening.

  FIGS. 3 and 4 show the second embodiment. FIGS. 3A and 3B are a vertical sectional view and an end view of the opening 8 showing the configuration of the apparatus, respectively. 4A and 4B are vertical sectional views for explaining the operation.

  In the second embodiment, the inside of the cleaning tank is divided into a first cleaning tank 11 and a second cleaning tank 12, corresponding to the first cleaning medium separating means 13 and the second cleaning tank. A medium separating means 14, a first suction duct 15 and a second suction duct 16, and a first suction port 17 and a second suction port 18 are provided.

  A suction device 7 is connected to the first suction port 17 and the second suction port 18 via a three-way valve 19. When the suction device 7 is operated, the first cleaning tank 11 and the second cleaning port are operated. Either one of the tanks 12 is sucked.

The air flow introduction pipe 9 is provided between the first cleaning tank 11 and the second cleaning tank 12, between the first cleaning medium separating means 13 and the second cleaning medium separating means 14, and between the first suction duct 15 and the first suction tank 15. It is provided between the second suction ducts 16.
In addition, what attached | subjected the same code | symbol as FIG. 1 has the same structure as the thing of FIG.

Next, the operation of the cleaning apparatus and the movement of the cleaning medium will be described with reference to FIG.
As in the case of the first embodiment, the cleaning medium 2 supplied from the opening 8 is the cleaning medium separating means on the side to which the suction machine 7 is connected, as shown in FIG. Adsorbed to the first cleaning medium separation means 13. When the opening 8 is pressed against the object to be cleaned 1 to create a closed space, an airflow is ejected from the airflow introduction tube 9 and the ejected airflow is sucked into the first cleaning tank 11 on the suction side.

Here, when the three-way valve 19 is driven and the connection of the suction machine 7 is switched as shown in FIG. 4B and the second cleaning tank 12 is sucked to a negative pressure, it is ejected from the air flow introduction pipe 9. The direction of the airflow is changed, and the first cleaning tank 11 on the side where the cleaning medium 2 is adsorbed is in a windless state.
At this time, the cleaning medium 2 falls due to weight and moves to a position near the lower end of the airflow introduction tube 9 in the direction of the opening 8.
The airflow introduction tube 9 injects airflow in the direction of the opening 8, that is, in the direction of the cleaning object 1, and the cleaning medium 2 is accelerated by the airflow and collides with the cleaning object 1, and then connected to the suction machine 7. It enters the second cleaning tank 12 and is adsorbed by the second cleaning medium separating means 14. At this time, the dirt adhering to the cleaning medium 2 is separated.

  By repeating this operation, the cleaning medium 2 repeatedly collides with the object 1 to be cleaned and removes foreign matter.

  In this embodiment, the number of cleaning tanks is two. However, even if the cleaning tanks are divided into three or more and each of the cleaning tanks is alternately or sequentially subjected to a negative pressure, the same effect is obtained with respect to the movement of the cleaning medium 2. can get.

  In addition, the three-way valve 19 is driven to switch the connection of the suction machine 7 between the first cleaning tank 11 side and the second cleaning tank 12 side so that one of them is in a suction state and the other is in a non-suction state. Control may be performed to change the degree of suction.

  In the second embodiment, the cleaning medium can be moved from the non-suctioned cleaning tank to the suctioned cleaning tank, and the retention of the cleaning medium can be reduced.

  FIGS. 5 and 6 show a third embodiment, and FIGS. 5A and 5B are a horizontal sectional view and a vertical sectional view showing the configuration of the apparatus, respectively. 6A, 6B, and 6C are vertical sectional views for explaining the operation.

  In the third embodiment, in addition to the structure shown in the first embodiment, in addition to the air flow introduction tube 9 that accelerates the cleaning medium 2 in the direction of the cleaning target 1, the surface of the punching metal that is the cleaning medium separating means A cleaning medium flying air flow introducing pipe 21 for blowing an air flow in parallel with the air is provided.

  The airflow introduction tube 9 and the cleaning medium flying airflow introduction tube 21 are formed by dividing a cylindrical tube into two.

  The lower end of the cleaning medium flying air current introducing pipe 21 is bent so that the inflowing gas moves along the lower surface of the cleaning medium separating means 4.

  The air flow introduction pipe 9 has a butterfly valve 10, and the cleaning medium flying air flow introduction pipe 21 has a flying air introduction pipe butterfly valve 22. These valves are controlled independently. In this embodiment, a butterfly valve is used, but other valves may be used.

  The cleaning medium flying air flow introducing tube 21 is rotatable, and the air flow can be blown over the entire surface of the cleaning medium separating means 4 by rotation.

Further, the cleaning medium separating means 4 is angled so that the air flow along the cleaning medium separating means 4 exiting from the cleaning medium flying introduction pipe 21 has a vector directed toward the opening 8 and is blown off. The cleaning medium 2 is configured to be easily positioned near the lower end of the front end of the air flow introduction tube 9 that accelerates the cleaning medium 2.
In addition, what attached | subjected the same code | symbol as FIG. 1 has the same structure as the thing of FIG.

  Next, the operation of the cleaning apparatus and the movement of the cleaning medium according to the third embodiment will be described with reference to FIG.

  First, in a state where both the butterfly valve 10 and the flying air introduction pipe butterfly valve 22 are closed, the opening 8 is pressed against the cleaning object 1 to form a closed space.

  When the inside of the cleaning tank 3 is sucked through the punching metal which is the cleaning medium separating means 4 and the negative pressure is opened after opening the butterfly valve 22 for the flying air introduction pipe, the cleaning medium separating means 4 is shown in FIG. A parallel air flow is generated. The airflow in this direction hits the flaky cleaning medium 2 attached to the cleaning medium separating means 4 from the side, and has a high effect of entering between the cleaning medium 2 and the cleaning medium separating means 4 and causing the cleaning medium 2 to fly. The cleaning medium 2 can be made to fly from the cleaning medium separating means 4.

  This operation can be applied to the entire surface of the cleaning medium separating means 4 by rotating the cleaning medium flying air flow introducing pipe 21.

  Further, as shown in FIG. 6 (B), the flying air introduction pipe butterfly valve 22 is closed, and the butterfly valve 10 of the air flow introduction pipe 9 is opened to generate an accelerating air current, thereby bringing the cleaning medium 2 into the opening 8. It can be accelerated.

  Thereby, the cleaning medium 2 can collide with the cleaning object 1 and can be cleaned. As shown in FIGS. 6A and 6B, the butterfly 22 valve for the flying air introduction pipe and the butterfly valve 10 of the air introduction pipe 9 are simultaneously opened as shown in FIGS. If it controls so that it may not, it can collide the washing | cleaning medium 2 with the washing | cleaning target object 1 more effectively.

Next, as shown in FIG. 6C, the inflow airflow stop mode in which both the flying airflow introduction pipe butterfly valve 22 and the butterfly valve 10 of the airflow introduction pipe 9 are closed is periodically executed.
In this mode, the airflow does not flow into the cleaning tank 3, and the internal pressure in the cleaning tank 3 approaches the internal pressure in the suction duct 5, so that the force of adsorbing the cleaning medium 2 of the cleaning medium separating means 4 is weakened. When the flying air introduction tube butterfly valve 22 is opened in the next step shown in FIG. By performing such control, there is an effect of preventing the cleaning medium separating means 4 from being clogged and maintaining the cleaning capability without reducing the suction force of the entire cleaning device.

  By repeating the operations shown in FIGS. 6A to 6C, the cleaning medium 2 repeatedly collides with the object to be cleaned 1 to remove foreign matter.

In the present embodiment, the passive airflow generated by the negative pressure in the cleaning tank 3 is used as the airflow introduced by the airflow introducing tube 9 for accelerating the cleaning medium 2 and the flying airflow introducing tube 21 for flying the cleaning medium. However, either or both of these may be connected to a compressor and compressed air may be used.
When compressed air is used, the energy given to the cleaning medium 2 can be made larger than the passive airflow.
In addition, an air flow having a certain size can be generated regardless of the flow rate sucked from the cleaning medium separating means 4. However, in order to operate the cleaning medium 2 so as not to leak from the cleaning tank 3, the consumption of compressed air is controlled to be less than the flow rate to be sucked, and promptly when the cleaning tank 3 is separated from the cleaning object 1. The control such as stopping the supply of compressed air is performed.
Note that the use of this compressor is not limited to this embodiment, and can be similarly implemented in other embodiments.

  In this third embodiment, the air flow parallel to the surface of the cleaning medium separating means is an air flow that makes it easy to fly the flaky cleaning medium. By generating such an air flow, the cleaning medium is placed on the cleaning medium separating means. Even if it adheres and stays on the surface due to factors such as static electricity, it is blown away to fly, so that the cleaning efficiency can be improved.

  FIGS. 7 to 10 show a fourth embodiment, and FIGS. 7A and 7B are a horizontal sectional view and a vertical sectional view showing the configuration of the apparatus, respectively.

  (A1), (A2), (B1), and (B2) in FIG. 8 are a horizontal sectional view and a vertical sectional view for explaining the operation, respectively.

  FIG. 9 is a perspective view showing a modified example of the present embodiment, and FIGS. 10A and 10B are a horizontal sectional view and a vertical sectional view showing the modified example.

  FIG. 11 is a perspective view showing an example of use of the apparatus of this embodiment.

In the fourth embodiment, a conical cleaning tank 23 whose vertical direction is opposite to that of the cleaning tank 3 of FIG. 1 is used, and a cleaning medium separating means 24 formed of punching metal is disposed on the bottom surface of the cone. .
The reason why the cleaning medium separating means 24 is disposed on the bottom surface of the cone is that it has a large area and is hardly affected by the centrifugal force caused by the swirling flow. A suction duct 5 is provided on the lower surface of the cleaning tank 3 via a cleaning medium separating means 24, and a suction machine 7 is connected to the suction duct 5.

On the side surface in contact with the bottom surface of the cleaning tank 23, a swirl flow generating air flow introduction pipe 25, which is a swirl flow generating means for generating a swirl flow by an air flow along the circumferential direction and accelerating the cleaning medium 2, It is received even if it is directed in the direction that touches.
A piston valve 26 is connected to the swirl flow generation air flow introduction pipe 25, and the swirl flow generation air flow introduction pipe 25 can be controlled to open and close in a short cycle.

Two or more swirl flow generating air flow introduction pipes 25 may be arranged according to the shape and size of the cleaning tank 23.
Further, in this embodiment, a tubular introduction pipe is used. However, for example, an opening and a flow control plate may be used as long as the air flow can be controlled in the direction in which the swirl flow is generated.

In addition, an opening 27 for bringing the object to be cleaned 1 into contact is provided on a side surface in contact with the bottom surface of the cleaning tank 23. The opening 27 is arranged at a position where the airflow generated by the swirling flow generating airflow introduction pipe 25 directly hits.
As in the case described with reference to FIG. 1, it is more effective to arrange a flexible member around the opening 27 in order to improve the adhesion with the object 1 to be cleaned.
At the moment when the opening 27 is separated from the object 1 to be cleaned, an airflow flows from the opening 27 due to the vacuum break. The area of the opening 27 is a swirl flow in order to suck the airflow when the vacuum breaks. The total area of the generated air flow introduction pipe 25 is set to be equal to or larger.

  A cylindrical member 28 having a cylindrical shape or an elliptical cylindrical shape is disposed in the central portion of the cleaning tank 23 to facilitate the formation of a swirling flow, and the flow area of the swirling flow is reduced to improve the flow velocity. ing.

In this embodiment, the opening 27 is arranged at a position where the air flow from the swirl flow generating air flow introduction pipe 25 directly hits. However, the speed of the cleaning medium 2 accelerated by the swirl flow has a speed required for cleaning. If it is the position which has, it can arrange | position other than the position where an airflow directly hits.
In addition, in each figure, what attached | subjected the same code | symbol as FIG. 1 has the same structure as the thing of FIG.

  Next, the operation of the cleaning device and the movement of the cleaning medium 2 will be described with reference to FIG.

  First, the suction machine 7 is driven with the piston valve 26 closed, and the cleaning medium 2 is sucked into the opening 3 through the opening 27. Thereby, an appropriate amount of the cleaning medium 2 corresponding to the area of the cleaning medium separating means 24 can be supplied into the cleaning tank 23.

  Next, the opening 27 of the cleaning tank 23 is pressed against the cleaning object 1 to form a closed space. When the closed space of the cleaning tank 23 becomes negative pressure, the piston valve 26 connected to the swirl flow generating air flow introduction pipe 25 is released. Then, as shown in (A1) and (A2) of FIG. 8, the airflow flows into the cleaning tank 23 to accelerate the cleaning medium 2 in the direction of the opening 27 and along the inner wall of the conical cleaning tank 23. Rotating swirl flow is generated.

  At this time, the swirl flow becomes an air flow in a direction parallel to the cleaning medium separating means 24 arranged on the conical bottom surface, and therefore hits the lamellar cleaning medium 2 stuck on the cleaning medium separating means 24 from the side. Then, an air flow enters between the cleaning medium 2 and the cleaning medium separating means 24, and the cleaning medium 2 adsorbed on the cleaning medium separating means 24 is separated from the cleaning medium separating means 24 and fly. As a result, the cleaning medium 2 accelerated by the airflow collides with the cleaning object 1 and cleaning is performed.

If the generation of the swirl flow continues, the cleaning medium 2 begins to be gradually adsorbed on the cleaning medium separation unit 24, and the cleaning medium separation unit 24 becomes clogged.
If the cleaning medium separating means 24 is clogged, the flying amount of the cleaning medium 2 is reduced. Therefore, the piston valve 26 of the swirling flow generating air flow introduction pipe 25 is closed to switch to the inflow air flow stop mode.

  In this mode, as shown in (B1) and (B2) of FIG. 8, the inflow airflow is stopped or extremely reduced by the control of the piston valve 26, and the internal pressure in the cleaning tank 23 is temporarily sucked. Since the internal pressure of the duct 5 is approached, the adsorption force of the cleaning medium separating means 24 with respect to the cleaning medium 2 is weakened, and it is easy to fly when a swirling flow is generated again.

By periodically closing the piston valve 26 of the swirling flow generating air flow introduction pipe 25 and periodically switching to the inflow air flow stop mode, the cleaning medium 2 repeatedly collides with the cleaning object 1 and cleaning is continued. The
The opening and closing cycle of the piston valve 26 is adjusted according to the cleaning medium 2 because the easiness of staying varies depending on the flexibility and size of the cleaning medium 2, but is generally controlled at a period of 0.1 to 1 second.

  In this embodiment, the piston valve 26 is used. However, a valve that can seal the inflow of air and has a fast response speed may be used.

  For example, as shown in FIG. 9, if a valve of a method in which the shielding plate 29 is rotated by the motor 30 is used, the opening 27 can be opened and closed in a shorter cycle, and the central angle of the shielding plate 29 is adjusted. The duty ratio for opening and closing can be set easily.

  When the swirl flow is used, even if the airflow flowing into the cleaning tank 23 stops or weakens, the cleaning medium 2 continues to move due to inertia, so that it does not stay easily. It is accelerated and easily moved at high speed. In addition, the cleaning medium 2 moving at high speed is less likely to be adsorbed by the cleaning medium separation means 24 and has an effect of separating the dust adhered to the cleaning medium 2 by centrifugal force. The dust separated at this time is sucked out of the cleaning medium separating means 24 and discharged.

  In this embodiment, a conical shape is used as the cleaning tank 23, but other shapes may be used as long as a strong swirl flow is generated. For example, a cylindrical cleaning tank 31 shown in FIG. 10 may be used. Similarly, in the cylindrical cleaning tank 31, the cleaning medium separating means 24 is disposed on a surface where centrifugal force due to the swirling flow does not act.

In the fourth embodiment, since the swirl flow generating air flow introduction pipe 25 faces the direction of the opening 27, it also functions as a cleaning medium accelerating means, but separately or in combination with this, for example, On the cylindrical member 28 disposed in the center of the cleaning tank 23, an air flow introducing tube 9 as a cleaning medium accelerating means can be provided. Thereby, the setting of the air flow introduction state, the acceleration state of the cleaning medium 2 and the like can be set in detail, and the cleaning ability can be improved.
FIG. 11 shows an example in which the apparatus of the fourth embodiment is used. In this example, as shown in FIG. 9, a valve that rotates the shielding plate 29 with a motor 30 is used.
In FIG. 11, 32 is a dip pallet, 33 is an opening of the dip pallet, and 34 is a flux. An operator holds the cleaning tank 23 in his hand and leaks around the opening 33 to adhere to the flux 34 attached thereto. On the other hand, by pressing the opening 27 of the cleaning tank 23 and rotating the shielding plate 29, the flux 34 corresponding to the opening 27 of the cleaning tank 23 is removed. In this state, the cleaning tank 23 is slowly moved in parallel to remove other portions of the attached flux 34.

  In the fourth embodiment, by using the swirl flow, a stronger blowing effect can be obtained with respect to the cleaning medium adsorbed on the cleaning medium separating means.

  In addition, a swirling flow can be generated with a simple configuration, and the cleaning medium is concentrated on a portion close to the bottom surface of the cone by centrifugal force, so that the cleaning medium is applied to the object to be cleaned at a higher density to perform cleaning. Cleaning efficiency can be improved.

  In addition, by opening and closing the on-off valve of the air flow introduction pipe in a short cycle, the force of the cleaning medium separating unit adsorbing the cleaning medium is changed periodically by changing the magnitude of the gas flow in the direction of the cleaning medium separating unit in a short cycle. Therefore, the cleaning medium once adsorbed and retained can be re-flighted and used for dry cleaning.

DESCRIPTION OF SYMBOLS 1 Cleaning object 2 Cleaning medium 3 Cleaning tank 4 Cleaning medium separation means 5 Suction duct 6 Suction port 7 Suction machine 8 Opening part 9 Airflow introduction pipe 10 Butterfly valve 11 1st cleaning tank 12 2nd cleaning tank 13 1st Cleaning medium separation means 14 Second cleaning medium separation means 15 First suction duct 16 Second suction duct 17 First suction port 18 Second suction port 19 Three-way valve 21 Cleaning medium flying air introduction tube 22 Flying air introduction Pipe butterfly valve 23 Cleaning tank 24 Cleaning medium separating means 25 Swirling flow generating air flow introducing pipe 26 Piston valve 27 Opening 28 Cylindrical member 29 Shielding plate 30 Motor 31 Cleaning tank 32 Dip pallet 33 Opening 34 Flux

Claims (18)

A cleaning device for accelerating a laminar cleaning medium by an air flow and colliding with an object to be cleaned, a cleaning tank having an opening, and a cleaning medium separating means provided in the cleaning tank and preventing the cleaning medium from passing therethrough Gas inflow means for injecting gas into the cleaning tank, suction means for sucking the gas in the cleaning tank through the cleaning medium separating means and making the inside of the cleaning tank have a negative pressure, and in the direction of the opening A cleaning apparatus comprising cleaning medium acceleration means for accelerating the cleaning medium toward
A cleaning apparatus, comprising: negative pressure changing means for periodically changing the negative pressure in the cleaning tank in a state where an object to be cleaned is in contact with the opening.   2. The cleaning apparatus according to claim 1, wherein the negative pressure fluctuation caused by the negative pressure fluctuation means is a fluctuation that weakens the adsorption force of the cleaning medium to the cleaning medium separation means.   2. The cleaning apparatus according to claim 1, wherein the fluctuation of the negative pressure by the negative pressure fluctuation means is a fluctuation that enhances the acceleration of the cleaning medium by the cleaning medium acceleration means.   2. The cleaning apparatus according to claim 1, wherein the negative pressure fluctuation caused by the negative pressure fluctuation means is a fluctuation that weakens the adsorption force of the cleaning medium to the cleaning medium separation means and increases the acceleration of the cleaning medium acceleration means. Cleaning device to do.   5. The cleaning apparatus according to claim 1, wherein the negative pressure fluctuation means is a gas inflow means provided with an on-off valve.   6. The cleaning apparatus according to claim 5, wherein the on-off valve is closed to weaken the adsorption force of the cleaning medium to the cleaning medium separating means and the negative pressure in the cleaning tank is increased. A cleaning apparatus characterized in that the cleaning medium is accelerated by the acceleration means and the negative pressure in the cleaning tank is reduced. A cleaning device for accelerating a laminar cleaning medium by an air flow and colliding with an object to be cleaned, a cleaning tank having an opening, and a cleaning medium separating means provided in the cleaning tank and preventing the cleaning medium from passing therethrough A gas inflow means for allowing gas to flow into the cleaning tank; a suction means for sucking the gas in the cleaning tank through the cleaning medium separating means; and a cleaning medium for accelerating the cleaning medium toward the opening. A cleaning device comprising acceleration means,
A cleaning apparatus comprising gas flow fluctuation means for periodically changing the magnitude of the gas flow in the direction of the cleaning medium separation means in the cleaning tank in a state in which the object to be cleaned is in contact with the opening.   8. The cleaning apparatus according to claim 7, wherein the fluctuation caused by the gas flow fluctuation means is formed by a fluctuation of a difference between a magnitude of the gas flow introduced by the gas inflow means and a magnitude of the gas flow sucked by the suction means. A cleaning device characterized by.   9. The cleaning apparatus according to claim 7, wherein the gas flow fluctuation means is gas inflow means having an on-off valve.   10. The cleaning apparatus according to claim 1, wherein the cleaning medium accelerating unit is a gas inflow unit configured to flow gas into the cleaning tank toward the opening.   The cleaning apparatus according to any one of claims 1 to 10, wherein the gas inflow means is tubular, one end portion faces the opening of the cleaning tank, and the other end portion of the cleaning tank. A cleaning device that is open to the outside.   The cleaning apparatus according to any one of claims 1 to 11, comprising two or more cleaning tanks and cleaning medium separation means capable of independently controlling the suction state, and a gas inflow means between the plurality of cleaning tanks. A cleaning device characterized by being arranged.   13. The cleaning apparatus according to claim 1, further comprising an air flow generation unit that generates an air flow along a surface of the cleaning medium separation unit.   14. The cleaning apparatus according to claim 13, wherein the airflow along the surface of the cleaning medium separating means is a swirling flow.   The cleaning apparatus according to any one of claims 1 to 11, or 13 and 14, wherein the cleaning tank has a cylindrical shape, cleaning medium separating means is disposed on the cylindrical bottom surface, and the side surface in the vicinity of the bottom surface. A swirling flow generating means and an opening are provided in the swirling flow generating means, and the swirling flow generating means has an on-off valve. The cleaning apparatus according to any one of claims 1 to 11 or 13 to 15,
The cleaning tank has a conical shape, the cleaning medium separating means is disposed on the bottom of the cone, the swirling flow generating means and the opening are provided on the side surface near the bottom of the cone, and the swirling flow generating means has an on-off valve. A cleaning apparatus characterized by that.   17. The cleaning apparatus according to claim 1, wherein the cleaning tank is held in a hand so that the opening can be brought into contact with a cleaning portion of an object to be cleaned.   A cleaning method using the cleaning device according to any one of claims 1 to 17, wherein the opening of the cleaning tank is pressed against an object to be cleaned, and the on-off valve of the gas inflow means of the cleaning device is periodically opened and closed. A cleaning method comprising:

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