JP2014018777A - Dry cleaning casing, dry cleaning device and dry cleaning method - Google Patents

Abstract

Disclosed is a dry cleaning housing that can easily change the discharge speed of a cleaning medium during cleaning regardless of the type of the cleaning medium, and can achieve constant cleaning performance.
When an opening 18 abuts against an object 20 to be cleaned while the inside of a casing body 52 is sucked by suction means, external air flows from the inlet 24 at high speed, and swirling airflow is generated. It is formed. As a result, the cleaning medium 5 circulates and circulates, and is repeatedly cleaned by colliding with the cleaning target object 20 through the opening 18. The cylindrical flow path restricting member 16 that defines the swirling axis of the swirling airflow is formed with a cleaning medium discharge port 16a that takes in and discharges the cleaning medium that collides with the cleaning object 20 and is reflected. A dust collection duct is provided in the flow path restriction member 16, and the cleaning medium is discharged by a dust collection airflow. In the cleaning mode, the flow path restriction member 16 is rotated to shift the position of the cleaning medium discharge port 16a.
[Selection] Figure 1

Description

The present invention relates to a dry cleaning apparatus that performs cleaning by bringing a flying cleaning medium into contact with an object to be cleaned (hereinafter also referred to as “object to be cleaned”) (including the concept of collision). The present invention relates to a dry cleaning device that can be washed by hitting a part and is particularly suitable as a handy type, a dry cleaning casing and a dry cleaning method used in the dry cleaning device.
The present invention is used, for example, to remove flux adhered to a mask jig called a dip pallet or a carrier pallet used in a flow solder bath process, and particularly, a side surface of an object to be cleaned, a periphery of an opening, etc. It is suitable for removing flux stuck in a narrow area.

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. .
In general, since such cleaning is performed by immersing in a solvent, a large amount of solvent is consumed, cost increase cannot be avoided, and the burden on workers and the environment is extremely large.
A method of spraying a solvent onto an object to be cleaned in an apparatus without being immersed is also known, but there is no change in that a large amount of solvent is used.

As a technique for solving this problem, a dry cleaning apparatus disclosed in Patent Document 1 and the like by the present applicant has been proposed.
In these devices, a suction means is connected to a housing having an internal space to create a negative pressure in the housing, and external air is allowed to flow at a high speed from a ventilation passage provided in a part of the outer peripheral surface of the housing. A swirling airflow is generated in the body, and the swirling airflow causes the flake-like cleaning medium to circulate and fly in the housing.
The swirling airflow is generated by closing the opening having a larger cross-sectional area than the ventilation path formed on a part of the outer peripheral surface of the housing against the object to be cleaned, and the cleaning medium is cleaned at the opening. The surface of the object to be cleaned collides at high speed, and this is repeated to remove the contamination of the object to be cleaned.

  A porous separation plate is provided between the internal space of the housing and the suction means, and the cleaning medium that has become small due to dirt or wear removed from the object to be cleaned is removed during cleaning. It passes through the mesh hole and is collected to the suction means side.

In a dry cleaning housing that generates a swirling airflow inside, the cleaning medium gradually deteriorates and becomes small in size due to repeated collisions due to cleaning.
The cleaning medium having become smaller than the mesh hole of the separation plate is automatically discharged from the inside of the casing, so that the cleaning capability is maintained at a certain level or more.
In other words, by discharging the cleaning medium having a reduced cleaning ability, these stay in the swirl flow path and the cleaning operation of the cleaning medium having a high cleaning ability is less likely to be disturbed, and the cleaning ability is kept constant. It is.

FIG. 11 is an experimental graph showing the relationship between the cleaning ability of two types of cleaning media A and cleaning media B and the size of the cleaning media.
In the case where it is desired to secure the cleaning capability X or higher using the cleaning medium A, the size of the mesh hole of the separation plate may be set to a size capable of discharging the cleaning medium size A1 or less.
Further, it is known that the amount of the cleaning medium flying inside the housing may be too much or too little, and an appropriate amount is necessary to maintain a good cleaning ability.
For this reason, it is desirable to replenish the cleaning medium to supplement the discharged amount so as to keep the amount of the cleaning medium constant.

When it is desired to secure the cleaning capability X or more using the cleaning medium B, the size of the mesh hole of the separation plate may be set to a size capable of discharging the cleaning medium size B1 or less.
Thus, the degree to which the size decreases with the lapse of the cleaning time differs depending on the type of the cleaning medium.
When the size of the mesh hole of the separation plate is set to a size that allows a cleaning medium having a size of B1 or less to pass through, when the cleaning medium A is used, the cleaning medium (range a) having a cleaning capability is easily discharged, and the cleaning medium The amount of is easy to decrease.

On the other hand, if the size of the mesh hole of the separation plate is set to a size that allows a cleaning medium having a size of A1 or less to pass through, when the cleaning medium B is used, there is a cleaning ability until the size decreases from B1 to A1. The cleaning medium (range b) that does not remain remains in the housing.
In this case, the cleaning medium having no cleaning ability hinders the flying of the cleaning medium having the cleaning ability, resulting in a decrease in the cleaning ability as a whole.

Further, as described above, since there is an appropriate amount of the cleaning medium, the above problem cannot be solved by increasing the amount of the cleaning medium having a cleaning ability.
As shown in FIG. 12, it is necessary to keep the cleaning medium amount between W1 and W2 in order to secure the cleaning capacity X or more using the cleaning medium B, and the cleaning capacity decreases with other cleaning medium quantities. End up.
However, if the amount of the cleaning medium is maintained at an appropriate amount, the total amount with the cleaning medium that does not have the cleaning ability is obtained, so that the ratio of the cleaning medium having the cleaning ability is greatly reduced, and the cleaning ability is also reduced.

In the conventional configuration, depending on the type of the cleaning medium, in order to solve the above problem, it is necessary to interrupt the cleaning operation and replace the cleaning medium.
Even if the type of cleaning medium matches the size of the mesh holes in the separation plate, if the cleaning medium is excessively added, the amount of cleaning medium will be outside the range of the appropriate amount. No ability is gained.

  The present invention has been made in view of such a current situation, and it is possible to easily change the discharge speed of the cleaning medium during cleaning regardless of the type of the cleaning medium, and to achieve a constant cleaning ability. The main purpose is to provide a housing.

In order to achieve the above object, the present invention enables the cleaning medium to be intentionally discharged independently of the presence of the automatic discharge (natural discharge) of the cleaning medium based on the size of the mesh hole of the separation plate. did.
Specifically, the present invention is a dry cleaning housing that causes a cleaning medium to fly by an air flow and applies the cleaning medium to an object to be cleaned to clean the object to be cleaned, and an internal space in which the cleaning medium is allowed to fly An opening that abuts the object to be cleaned and causes the cleaning medium to collide with the object to be cleaned, an air passage that allows air from outside to pass through the internal space, and an air passage that introduces the air into the internal space A suction port that generates a swirling airflow in the internal space by sucking the air that has been performed; a flow path restriction member that defines a swirling axis of the swirling airflow in the internal space;
A cleaning medium discharge port for discharging the cleaning medium that reflects and flies in a region where the cleaning medium collides with the object to be cleaned and reflects and flies. It is characterized by.

  In addition, the present invention sucks the air inside the casing in a state where the opening of the casing is closed against the object to be cleaned, and allows the outside air to flow in from a vent provided in the casing. In a dry cleaning method in which a swirling airflow is generated inside and the cleaning medium flying by the swirling airflow collides with the object to be cleaned through the opening, the cleaning medium collides with the object to be cleaned and is reflected. The cleaning medium discharge port for discharging the reflected and flying cleaning medium is provided in the area flying and the cleaning medium is forcibly discharged from the cleaning medium discharge port during the cleaning operation. It is characterized by adjusting the amount of.

The definitions of terms in this specification are as follows.
The “casing” in the present invention refers to a container-like structure provided with a space having a shape that easily generates a swirling airflow inside. The shape that easily generates the swirling airflow is a shape having a continuous inner wall in which the airflow flows and circulates along the inner wall of the housing. More preferably, it is a shape having an inner wall or an internal space of a rotating body shape.
The “ventilation passage” is means for facilitating the flow of airflow in a certain direction, and is generally a tube shape having a smooth inner surface. However, for example, even if a plate-like flow path control plate having a smooth surface is used, a rectifying effect that facilitates the flow of gas in the direction along the surface is exhibited. To do.

In addition, the shape in which the airflow flows linearly is common, but the rectifying effect can be obtained even with a gentle curve that does not cause much flow path resistance. However, unless otherwise specified, the direction of the air passage means the direction of the air flow ejected at the air inlet of the housing.
An air passage that is an air intake port having a tube shape, one end connected to the air inlet of the inner wall of the housing, and the other end opened to the atmosphere outside the housing, ". The inlet generally has a low fluid resistance, has a smooth inner surface, and a circular, rectangular or slit shape is used for the cross section of the tube.

In the present invention, the “swirl airflow” means that the airflow accelerated by the inflow airflow from the air inflow flows while changing the direction along the inner wall of the housing, circulates back to the position of the air inflow, It is an airflow that merges with the airflow.
When the fluid forming the air flow is air, it is synonymous with “swirl air flow”. Generally, it is generated by flowing an air flow in a tangential direction of the inner wall in a closed space where the inner walls are continuous.

  According to the present invention, the discharge speed of the cleaning medium during cleaning can be easily changed regardless of the type of cleaning medium. As a result, the cleaning medium having the cleaning capability can be maintained in an appropriate amount without interrupting the cleaning operation, so that the cleaning capability can be maintained substantially constant without causing a reduction in work efficiency.

It is a schematic sectional drawing of the dry-type cleaning housing | casing which concerns on one Embodiment of this invention, and is a figure which shows the state which has a cleaning-medium discharge port in a non-discharge position. It is a principal part perspective view of the dry cleaning housing | casing in the state which has a purification medium discharge port in a non-discharge position. It is a schematic sectional drawing of the dry-type cleaning housing | casing which shows the state which has a washing-medium discharge port in a discharge position. It is a principal part perspective view of the dry-type cleaning housing | casing in the state which has a purification medium discharge port in a discharge position. It is an outline sectional view showing the state where a cleaning medium is discharged. It is a disassembled perspective view of the dry cleaning housing. It is a schematic sectional drawing which shows the flow of the airflow at the time of attraction | suction of the dry cleaning housing | casing. It is a figure explaining the discharge principle by a cleaning medium discharge port. FIG. 6 is a characteristic diagram showing a relationship between a rotation angle (discharge angle) of a flow path limiting member and a cleaning medium discharge amount. It is a graph which shows the result of the comparison experiment of the discharge operation in the past, and the discharge operation in the embodiment of the present invention. FIG. 10 is a characteristic diagram showing that the relationship between the cleaning ability and the cleaning medium size varies depending on the type of cleaning medium. It is a characteristic view which shows the relationship between a cleaning capability and the amount of cleaning media. It is a schematic sectional drawing which shows the structure of the dry cleaning apparatus which concerns on the prior art used as the foundation of this invention. It is a figure which shows the principle of the washing | cleaning operation | movement of the apparatus. It is a perspective view which shows the use condition of the dry cleaning apparatus.

Embodiments of the present invention will be described below with reference to the drawings.
First, based on FIG. 13 to FIG. 15, the basic configuration and function of the handy type dry cleaning apparatus according to the above-described prior art, which is the basis of the present invention in terms of the cleaning operation principle, will be described.
Based on FIG. 13, an outline of the configuration of the handy-type dry cleaning device 2 will be described. FIG. 13A is a transverse sectional view taken along line AA, and FIG. 13B is a longitudinal sectional view taken along line BB.
The dry cleaning device 2 includes a dry cleaning housing (hereinafter simply referred to as “housing”) 4 having a flying space for the cleaning medium 5 therein, and a suction means 6 for reducing the pressure inside the housing 4. .
The casing 4 is configured integrally with a cylindrical upper casing 4A as a casing main body and an inverted conical lower casing 4B. Here, the upper part and the lower part are convenient names on the drawing, and are not necessarily related to the upper and lower sides on the actual machine.

The lower housing 4B is integrally provided with a suction port 8 at the top of the cone, and functions as a suction duct.
The suction means 6 includes a flexible suction hose 10 having one end connected to the suction port 8 and a suction device 12 connected to the other end of the suction hose 10.
As the suction device 12, a household vacuum cleaner, a vacuum motor, a vacuum pump, or a device that indirectly generates a low pressure or a negative pressure by pumping fluid can be used as appropriate. Note that the positional relationship between the upper and lower surfaces of the member is merely a reference on the drawing.

The bottom surface of the upper housing 4A is a fitting recess 4A-1 that joins the upper end of the lower housing 4B, and the upper housing 4A and the lower housing 4B are separable. The upper surface 4A-2 of the upper housing 4A is sealed.
A porous separation plate 14 is provided as a porous means at the boundary between the bottom surface of the upper housing 4A and the lower housing 4B. The separation plate 14 is a plate-like member having holes such as punching metal.
The separation plate 14 prevents the cleaning medium 5 from moving toward the lower housing 4B when sucked. In FIG. 13A, the display of the separation plate 14 is partially omitted. The size of the cleaning medium 5 is exaggerated for easy understanding.

The porous means may be a porous shape having many pores of a size that allows air and dust (removed material removed from the object to be cleaned) to pass through without passing through the cleaning medium 5, such as a slit plate or a net. As long as the material has a smooth surface, resin or metal may be freely selected.
The porous means is arranged as a plane orthogonal to the swirling axis of the swirling airflow. Thereby, there exists an effect which prevents retention of the washing | cleaning medium 5 by an airflow flowing in the direction along a porous means.
In order to suppress the attenuation of the swirling air flow, it is desirable that the inner surface of the housing is smooth without steps and irregularities.

By arranging the porous means on the surface along the swirling airflow, the cleaning medium adsorbed on the surface of the porous means can be peeled off and re-flighted.
The material of the housing 4 is not particularly limited, but is preferably made of metal such as aluminum or stainless steel in order to prevent wear due to adhesion of foreign matter or friction with the cleaning medium, but a resinous material may be used. it can.

A cylindrical channel restricting member 16 is provided as a part of the casing at the center of the upper casing 4A so that the cylindrical axis of the upper casing 4A is a common axis. The lower end is fixed to the separation plate 14.
The channel restricting member 16 is provided for the purpose of improving the flow velocity by reducing the channel cross-sectional area of the swirling airflow. A ring-shaped swirling airflow movement space (cleaning medium flying space) having a smooth wall surface is formed in the upper housing 4A by the flow path restriction member 16.
The ring-shaped swirling airflow moving space is hereinafter also referred to as a “swirling flow path”. The flow path restriction member 16 is also a member that defines the swirling axis of the swirling airflow.
Depending on the shape of the upper casing 4A, the central axis of the flow path restricting member 16 and the central axis of the upper casing 4A do not necessarily have to be common, and may be eccentric if a ring-shaped space can be secured. good.

An opening 18 is formed in a part of the side surface of the upper housing 4A to allow the cleaning medium 5 flying with a swirling airflow to contact or collide with an object to be cleaned.
The upper housing 4A has a cylindrical shape whose height is extremely small with respect to the diameter. By providing the opening 18 in a part of the side surface forming the height, the housing 4 as a whole is shown in FIG. As shown in FIG. 4, the outer peripheral portion other than the opening 18 largely escapes (separates) from the cleaning target 20, and the degree of freedom of local contact with the cleaning target 20, in other words, pinpoint cleaning is enhanced. .
The opening 18 has a shape obtained by cutting the side surface of the upper housing 4A by a flat cross section parallel to the cylindrical axis, and has a rectangular shape when viewed from a direction orthogonal to the cylindrical axis.

An air inflow port 22 is formed on the side surface of the upper housing 4A. An inlet 24 serving as a swirling air flow generating means and a ventilation path is connected to the air inflow port 22 from the outside of the upper housing 4A. It is integrally fixed to the housing 4A.
The inlet 24 is set substantially parallel to the separation plate 14, and the ventilation direction thereof is inclined with respect to the radial direction of the upper housing 4 </ b> A, and the extension line at the center of the ventilation path is positioned so as to reach the opening 18. Yes.
The inlet 24 has a width extending in the height direction of the upper housing 4A. One inlet 24 having a diameter or width smaller than the height of the upper housing 4A may be arranged, or a plurality of single inlets may be arranged in the height direction.

As shown in FIG. 13, when the opening 18 contacts and closes the object 20 to be cleaned, the inside of the housing 4 becomes a closed space, and outside air flows from the inlet 24 at a high speed. 5 is accelerated toward the opening 18 and a swirling airflow 30 as a swirling airflow is generated.
The swirling air flow generated when the closed space is formed has an effect of blowing away the cleaning medium adsorbed on the separation plate 14 and re-flighting.

When the opening 18 is opened, the opening 18 has an area large enough to set the internal pressure at the air inlet 22 to atmospheric pressure or the vicinity thereof. Further, the air inlet 22 is also arranged at a position where the atmospheric pressure or the vicinity thereof tends to be reached when the opening 18 is opened.
By providing such a configuration, while the opening 18 is not applied to the object to be cleaned, the air inlet 22 approaches the atmospheric pressure, so that the differential pressure with the outside decreases, and as a result, the airflow flowing in is reduced. Reduce dramatically. On the other hand, since the airflow flowing in from the opening 18 increases, the cleaning medium 5 can be prevented from leaking out of the housing 4.
In addition, when the opening 18 is opened, the total amount of airflow flowing in is 2 to 3 times as compared with when the opening 18 is closed, so that the lamellar cleaning medium is adsorbed on the porous means. , Do not leak out of the case without flying again.
This is called a cleaning medium adsorption effect when the opening is opened.

Although the cleaning medium 5 is a collection of flaky cleaning pieces, it is also used herein as a single flaky cleaning piece.
The flaky cleaning medium is a thin piece having an area of 1 mm ² or more and 200 mm ² or less. The material of the cleaning medium is a film made of a durable material such as polycarbonate, polyethylene terephthalate, acrylic, or cellulose resin, and the thickness is 0.02 mm to 1.0 mm.
However, depending on the object to be cleaned, it may be effective to change the thickness, size and material of the cleaning medium, and the use of these cleaning media is also included in the scope of the present invention. It shall not be caught.
The cleaning media is not limited to resin, but it is thin, lightweight, and easy to fly even with thin pieces such as paper and cloth, or with minerals such as mica, ceramics, glass, and metal foil. Can be used.

The ring-shaped internal space 26 of the upper housing 4 </ b> A is a space that has a function of causing the cleaning medium 5 to fly by the swirling air flow so as to come into contact with the cleaning target 20 facing the opening 18.
The internal space 34 of the flow path restriction member 16 is a space where the swirling air flow does not act.

A cleaning operation (hereinafter referred to as “cleaning operation”) by the dry cleaning apparatus 2 configured as described above will be described with reference to FIG. In FIG. 14, the thickness of the member is omitted, and the internal space 34 as a static space is hatched for easy understanding.
14B shows a state in which the opening 18 is separated from the object 20 to be cleaned and the opening 18 is opened to perform intake, and FIG. 14A shows the state where the opening 18 is applied to the object 20 to be cleaned. Indicates a blocked state.
Prior to the cleaning operation, the cleaning medium 5 is supplied into the housing 4. The cleaning medium 5 supplied into the housing 4 is sucked by the separation plate 14 and held in the housing 4 as shown in the lower diagram of FIG.
Since the inside of the housing 4 is in a negative pressure state due to intake air, air outside the housing flows into the housing 4 through the inlet 24, but the flow in the inlet 24 at this time is small in both flow velocity and flow rate. The swirling air flow 30 generated in the housing 4 does not reach the strength for causing the cleaning medium 5 to fly.

When the cleaning medium 5 is supplied and held in the housing 4, as shown in FIG. 14A, the opening 18 is put in a closed state by hitting the surface of the cleaning target 20 to be cleaned.
When the opening 18 is closed, the intake from the opening 18 stops, so the negative pressure in the housing 4 increases at a stretch. A high-speed air flow is blown out into the housing 4 from the inlet outlet (air inlet 22).
The blown air flow causes the cleaning medium 5 held on the separation plate 14 to fly toward the surface of the cleaning object 20 facing the opening 18.

The air flow becomes a swirling air flow 30 and flows in an annular shape along the inner wall of the housing 4, and a part thereof is sucked by the suction means 6 through the hole of the separation plate 14.
Thus, when the swirling air flow 30 that has flown in the annular shape inside the housing 4 returns to the outlet portion of the inlet 24, the air flow entering from the inlet 24 is accelerated while joining the swirling air flow 30. In this way, a stable swirling air flow 30 is formed in the housing 4.

The cleaning medium 5 swirls within the housing 4 by this swirling air flow and repeatedly collides with the surface of the cleaning object 20. Due to the impact caused by the collision, the dirt is separated from the surface of the cleaning object 20 in the form of fine particles or powder.
The separated dirt is discharged to the outside of the housing 4 by the suction means 6 through the hole of the separation plate 14.
The swirling air flow 30 formed in the housing 4 has a swirling axis orthogonal to the surface of the separation plate 14, and the swirling air flow 30 becomes an air flow parallel to the surface of the separation plate 14.
Therefore, the swirling air flow 30 is sprayed from the lateral direction onto the cleaning medium 5 sucked on the surface of the separation plate and enters between the cleaning medium 5 and the separation plate 14, and the cleaning medium 5 sucked on the separation plate 14. Is peeled off from the separation plate 14 and re-flys.

Further, since the opening 18 is blocked and the negative pressure in the upper housing 4A increases and becomes close to the negative pressure in the lower housing 4B, the force for sucking the cleaning medium 5 against the surface of the separation plate 14 is also reduced. As a result, the cleaning medium 5 can fly more easily.
Since the swirling air flow 30 is accelerated in a certain direction, a high-speed air flow is easily generated, and a high-speed flight movement of the cleaning medium 5 is also facilitated. The cleaning medium 5 that swivels at high speed is difficult to be sucked by the separation plate 14, and the dirt attached to the cleaning medium 5 is easily separated from the cleaning medium 5 by centrifugal force.

FIG. 15 shows a practical example of cleaning by the dry cleaning device 2 described above.
The object to be cleaned is a dip pallet used in the above-described flow solder bath process, and is denoted by reference numeral 100.
In the dip pallet 100, mask openings 101, 102, 103 are opened, and the flux FL is deposited and solidified around the holes of the mask openings. This accumulated and solidified flux FL is dirt to be removed.
As shown in FIG. 15, the base portion (suction port 8 portion) of the lower housing 4B is grasped with the hand HD, and the opening 18 of the housing 4 is pressed against the portion to be cleaned in the intake state.
Before the opening 18 is pressed against the part to be cleaned, the inside of the housing 4 is sucked and the cleaning medium 5 is sucked by the separation plate 14, so that the opening 18 faces downward, but the housing The cleaning medium 5 does not leak from the inside to the outside.
Of course, after the opening 18 is pressed against the site to be cleaned, the inside of the housing becomes airtight, and the cleaning medium does not leak out.

When the opening 18 is pressed against the portion to be cleaned, the inflow airflow by the inlet 24 increases rapidly, a strong swirling airflow 30 is generated in the housing 4, and the cleaning medium 5 sucked by the separation plate 14 is caused to fly, The flux FL is removed by colliding with the flux FL adhered and solidified on the site to be cleaned of the dip pallet 100.
As described above, the cleaning operator can hold the base of the lower housing 4B in the hand HD, move it with respect to the dip pallet 100, sequentially move the portion to be cleaned, and remove all the adhered and solidified flux FL. it can.

In the state of FIG. 15, the peripheral portion of the mask opening 101 of the dip pallet 100 is cleaned, and the peripheral portions of the mask openings 102 and 103 are in the process of cleaning.
Even if the opening 18 is moved away from the portion to be cleaned when the opening is moved with respect to the portion to be cleaned, the cleaning medium 5 does not leak out of the housing due to the above-described cleaning medium adsorption effect, so the number of cleaning media is maintained. In addition, the cleaning performance is not deteriorated due to the decrease in the amount of the cleaning medium.

Since the cleaning medium 5 is gradually destroyed by the impact caused by the collision with the cleaning site during repeated use, and is collected by the suction device 12 together with the flux (dirt) removed from the dip pallet 100 at the cleaning site, the dry cleaning device When the is used for a long time, the amount of the cleaning medium held in the housing is reduced.
In such a case, a new cleaning medium group is supplied into the housing 4.

An embodiment of the present invention will be described with reference to FIGS. In addition, the same part as the said basic technology is suitably shown with the same code | symbol. Further, the cleaning operation and the flying principle of the cleaning medium are the same as those in the basic technology, and the usage as a dry cleaning device is the same.
As shown in FIG. 6, the dry cleaning housing 50 according to the present embodiment includes a housing body 52 having a through hole in the pivot axis direction, and a cylindrical shape disposed at the center of the hole of the housing body 52. The flow path restriction member 16, the separation plates 14 </ b> A and 14 </ b> B fixed to both sides of the casing main body 52 in the pivot axis direction, the exterior covers 54 </ b> A and 54 </ b> B that cover the outside of each separation plate 14, and the inner side of the flow path restriction member 16 The cylindrical dust collecting duct 56 is arranged in a double cylinder configuration.

One end portion 56a of the dust collection duct 56 is closed, and this portion is inserted into and supported by the center hole 54A-1 of the exterior cover 54A.
The other end 56b of the dust collection duct 56 serves as a suction port. The suction port 56b penetrates the center hole 54B-1 of the exterior cover 54B and is connected to the suction means 6 described above.
The flow path restriction member 16 is formed with a cleaning medium discharge port 16a for discharging the cleaning medium when necessary. In the vicinity of one end portion 56a of the dust collection duct 56, a plurality of intake holes 56c are formed in the circumferential direction corresponding to the cleaning medium discharge port 16a.

An inlet 24 is formed on the upper side of one side of the casing body 52, and an opening 18 is formed on the lower end side in the linear direction of the inlet 24.
As shown in FIG. 7, the dust collection duct 56 is disposed inside the flow path restriction member 16, and the space in the flow path restriction member and the suction port 56 b communicate with each other.
During operation, the airflow flowing from the inlet 24 is discharged from the suction port 56b to the suction means through the separation flow path 14 through the separation plate 14 and through the space inside the flow path restriction member and the dust collection duct. ing.

When the cleaning medium is present in the housing and the opening 18 is separated from the object to be cleaned, the cleaning medium is adsorbed by the separation plate 14 and held in the housing.
The cleaning medium discharge port 16a that communicates from the swirling flow path to the inside of the flow path restricting member, that is, communicates from the swirling flow path to the outside has a size through which the cleaning medium can pass.
The hole shape of the cleaning medium discharge port 16a is not particularly limited as long as the cleaning medium can pass through, but a round hole, a long hole, and a square hole are preferable from the viewpoint of ease of processing. The size is preferably about 1 to several times the size of the cleaning medium from the same viewpoint.
The intake hole 56c of the dust collection duct 56 is formed to be larger than the cleaning medium discharge port 16a from the viewpoint of passing the cleaning medium and intake air.

Based on FIG. 8, the principle of discharge by the cleaning medium discharge port 16a will be described.
As shown in FIG. 8A, the cleaning medium 5 swirling with the swirling air flow 30 is linearly accelerated by the high-speed airflow flowing from the inlet 24 and collides with the cleaning target object 20 through the opening 18. .
The cleaning medium collides with the object to be cleaned at the opening, and then flies toward the flow path restriction member 16 due to collision reflection (arrow R1).
However, since the swirling air flow is generated in the housing, the cleaning medium collides with the outer peripheral surface of the flow path restricting member 16 without the cleaning medium discharge port 16a, or along the outer peripheral surface immediately before the collision. The direction of motion is corrected (arrow R2), and then fly again on the swirling airflow 30.

As shown in FIG. 8B, when the cleaning medium discharge port 16a is present in a region where the cleaning medium collides with the cleaning object 20 and is reflected and flies, a dust collecting duct 56 is provided at the site of the cleaning medium discharge port 16a. Suction airflow (hereinafter referred to as “dust-collecting airflow”) V is generated by suction through the air.
The cleaning medium 5 that has collided and reflected to fly is sucked into the flow path restriction member 16 through the cleaning medium discharge port 16 a by the dust collection airflow, and passes through the intake hole 56 c of the dust collection duct 56 to enter the dust collection duct 56. Is sucked and discharged.
Thereby, the cleaning medium which has a size that does not pass through the separation plate 14 and flies in the housing can be intentionally discharged (thinned out). That is, the amount of the cleaning medium in the housing can be arbitrarily adjusted during cleaning.

In FIG. 8B, an ideal angle at which the cleaning medium collides with the object to be cleaned and is reflected is displayed. However, the position that can be discharged (captured) by the cleaning medium discharge port 16a is not limited to this one position, but to some extent It has been confirmed by experiments that the above range exists.
FIG. 9 shows the relationship between the angle of the cleaning medium discharge port 16a and the amount of cleaning medium discharged for a certain period of time.
Evaluation was performed while rotating the flow path restriction member 16 in the positive direction (counterclockwise direction) and the negative direction (clockwise direction) with the line from the opening 18 toward the rotation center of the flow path restriction member 16 being 0 °. . From FIG. 9, it can be seen that the emission amount decreases rapidly when it exceeds ± 30 ° from around 0 °.

This means that the discharge amount of the cleaning medium can be adjusted by changing the position of the cleaning medium discharge port 16a, in this case, by changing the rotation angle of the flow path restriction member 16.
The reason why the line from the opening 18 toward the rotation center of the flow path restricting member 16 is defined as 0 ° is that the cleaning medium collides with the object to be cleaned and is reflected and flies toward the flow restricting member 16. This is because the position where the probability of going is the highest.

1 and 2 show a state in a normal cleaning mode.
As shown in FIG. 1, in the cleaning mode, the flow path restriction member 16 is set so that the cleaning medium discharge port 16a is located upstream of the position where the air flowing in from the inlet and the swirling airflow merge. Is done. The arrow K1 shows an example of the direction of rotational operation of the flow path restriction member 16 from the discharge mode position.
In other words, the cleaning medium discharge port 16 a is set so as to be located on the back side of the inlet 24.
At this position, the cleaning medium flies along the inner surface of the casing by centrifugal force, that is, stably travels at high speed in the outer peripheral region of the swirl flow path 60. For this reason, the cleaning medium in flight is not discharged from the cleaning medium discharge port 16a located on the inner peripheral side of the swirl flow path.

As described above, the dust collection airflow is generated at the portion of the cleaning medium discharge port 16a, but the strength thereof does not affect the flying of the cleaning medium flying on the outer peripheral side of the swirl flow path 60. Because.
For this reason, the amount of the cleaning medium having a size that does not pass through the separation plate 14 is not unintentionally reduced during the cleaning.
A configuration may be adopted in which the flow path restriction member 16 is always urged using an elastic member such as a torsion spring and a stopper so that the position is always set to the position shown in FIG. 1 during cleaning.

In the discharge mode, as shown in FIGS. 3 and 4, the flow path restriction member 16 is set so that the cleaning medium discharge port 16 a is located at a position where the cleaning medium reflected by collision with the object to be cleaned can be captured. The The arrow K2 shows an example of the direction of rotation operation of the flow path restriction member 16 from the cleaning mode position.
As shown in FIG. 5, the cleaning medium 5 that has collided with the object to be cleaned and reflected and flew is sucked into the flow path restriction member 16 through the cleaning medium discharge port 16 a by the dust collection airflow, and the dust collection duct 56 The air is sucked into the dust collection duct 56 through the intake hole 56c and discharged. In FIG. 1 and the like, the dust collection duct 56 is omitted.
The flow path restriction member 16 in the present embodiment can be rotated by a knob (not shown) from the outside of the housing. The casing main body 52 is provided with a mark for easily aligning the knob with a predetermined position visually.
The mark is provided so that the angle from the reference position can be set, or the position of the flow path restriction member 16 can be set according to the type of the cleaning medium.
When the cleaning medium is forcibly discharged, the flow path restricting member 16 may be shifted to a position where the cleaning medium is not captured by the cleaning medium discharge port 16a.

The rotation of the flow path restriction member is not particularly limited and may be manually operated. However, the flow restriction member needs to be driven while maintaining the airtightness in the housing.
As long as the airtightness in the housing is maintained, the adjustment may be performed manually by pulling the rotation knob of the flow path restricting member outside the housing as described above.
Further, the diameter of the mesh hole of the separation plate 14 may be reduced so that the deteriorated cleaning medium is not discharged or discharged at a low speed by the separation plate, and the discharge amount by the cleaning medium discharge port 16a may be adjusted.
In this way, by controlling the discharge amount for each type of cleaning medium and continuing to supply the shortage, it is possible to create a state in which the ratio of the cleaning medium always having a cleaning capability is large during the cleaning operation.

  The means for supplying the cleaning medium is not particularly limited and may be manually operated. However, when supplying a fixed amount, it is preferable to use a general feeder structure.

With the above configuration, in addition to discharging the cleaning medium that has deteriorated to a small size from the separation plate, an appropriate amount of cleaning medium of a small size or more is discharged from the cleaning medium discharge port, and an appropriate amount of new cleaning is performed instead. By replenishing the medium, the cleaning medium having the cleaning ability can be maintained at a constant amount.
Further, since the flow path limiting member is rotatable, the position of the cleaning medium discharge port can be changed, and thereby the amount of cleaning medium discharged can be controlled. Further, since the cleaning medium is discharged with the opening closed, the cleaning is not interrupted.

FIG. 10 shows the result of a comparison experiment between the conventional example of the cleaning medium discharge and the embodiment according to the present invention.
In the experiment, a certain amount of cleaning medium was weighed and filled in the case, the opening was closed with the dummy of the object to be cleaned, and the dust collector was in operation. The amount of cleaning medium discharged was determined according to the angle of the discharge port.
A solid line (a) shows an example in which a particularly aggressive discharge mode is not performed in the prior art, that is, a result of natural discharge.
In this case, as the cleaning time elapses, the cleaning medium is consumed, and the broken pieces are discharged from the separation plate, and the total weight of the cleaning medium gradually decreases. Further, it is consumed and rapidly decreases when the size of the cleaning medium becomes smaller than the mesh size of the separation plate.

An alternate long and short dash line (b) shows a result in an example in which the rotation angle of the flow path restriction member 16 is 45 ° from the reference in the present embodiment.
Although the total weight of the cleaning medium is decreasing more rapidly than the conventional example, since the size of the entire cleaning medium is larger than the mesh size of the separation plate, there is no state in which the cleaning medium decreases rapidly, and the amount of cleaning medium decreases. As the discharge time increases.
The broken line (c) shows the result when the rotation angle of the flow path restriction member 16 is set to the reference (0 °) in the present embodiment.
When the discharge process was performed at the time of the discharge command, it was faster than the above two examples, and the total weight of the cleaning medium decreased in a few seconds, and it was confirmed that it was completely discharged.
From this result, the superiority of the discharge amount adjustment mode of the present embodiment can be seen.

In the above embodiment, the cleaning medium discharge port 16a is provided in the flow path restriction member 16 and the flow path restriction member 16 is rotated to set the discharge position shown in FIG. 3 and the non-discharge position shown in FIG. However, the present invention is not limited to this.
Although not shown, a shutter member that can be operated from the outside of the housing and opens and closes the cleaning medium discharge port 16a may be provided, and the cleaning medium discharge port 16a may be opened only in the discharge mode.
In this case, the flow path restriction member 16 may be fixed at the position shown in FIG. 8B or the like, and may be rotatable so that the discharge amount can be adjusted.

DESCRIPTION OF SYMBOLS 2 Dry-type cleaning apparatus 5 Cleaning medium 6 Suction means 12 Suction means 14 Separation plate as porous means 16 Flow path restricting member 16a Cleaning medium discharge port 18 Opening portion 20 Object to be cleaned 24 Inlet as air passage 50 Dry cleaning housing 56b Suction mouth

JP 2012-121017 A

Claims (10)

A dry cleaning housing that causes a cleaning medium to fly by an air current, and applies the cleaning medium to an object to be cleaned to clean the object to be cleaned.
An internal space for flying the cleaning medium;
An opening that contacts the object to be cleaned and causes the cleaning medium to collide with the object to be cleaned;
A ventilation path for passing air from outside to the internal space;
A suction port for generating a swirling airflow in the internal space by sucking air introduced into the internal space through the air passage;
A flow path restricting member that defines a swirling axis of the swirling airflow in the internal space;
In a dry cleaning housing having
A dry cleaning casing having a cleaning medium discharge port for discharging the cleaning medium reflected and flying in a region where the cleaning medium collides with the object to be cleaned and reflects and flies. . The dry cleaning housing according to claim 1,
A dry cleaning housing characterized in that the position of the cleaning medium discharge port can be changed. The dry cleaning casing according to claim 1 or 2,
The dry cleaning housing, wherein the cleaning medium discharge port is provided in the flow path restriction member. The dry cleaning housing according to claim 3,
The dry cleaning housing, wherein the flow path restriction member is provided to be rotatable around a pivot axis, and the position of the cleaning medium discharge port is changed by rotating the flow path restriction member. The dry cleaning housing according to claim 4,
The flow path restriction member has a cylindrical shape, a dust collection duct having the suction port is provided inside the flow path restriction member, and the cleaning medium that has passed through the cleaning medium discharge port can be sucked into the dust collection duct. A dry cleaning housing characterized in that The dry cleaning casing according to claim 4 or 5,
A dry cleaning casing having a mark indicating a relationship between a type of cleaning medium and a rotation amount of the flow path restriction member. The dry cleaning housing according to claim 6,
The dry cleaning case, wherein the mark includes a mark indicating a relationship between a rotation amount of the flow path restriction member and a discharge amount of the cleaning medium. In the dry cleaning housing according to any one of claims 1 to 7,
A dry cleaning housing comprising a porous means for allowing a removal object removed from the object to be cleaned to pass to the suction port side.   A dry cleaning apparatus comprising: the dry cleaning housing according to claim 1, a suction unit connected to the suction port, and the cleaning medium. With the opening of the housing closed against the object to be cleaned, the air inside the housing is sucked in, and external air flows from the vents provided in the housing, creating a swirling airflow inside the housing. In the dry cleaning method of cleaning by causing the cleaning medium flying in the swirling airflow to collide with the object to be cleaned at the opening,
In the region where the cleaning medium collides with the object to be cleaned and reflects and flies, a cleaning medium discharge port for discharging the cleaning medium reflecting and flying is provided, and cleaning is performed from the cleaning medium discharge port during the cleaning operation. A dry cleaning method, wherein the medium is forcibly discharged to adjust the amount of the cleaning medium in the housing.

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