JP4933374B2 - Dry cleaning equipment - Google Patents

Description

  The present invention relates to an apparatus for removing dust and powder adhering to an object to be cleaned using a solid cleaning medium without using water or a solvent. In particular, the present invention relates to a dry cleaning apparatus for relatively complicated parts to which toner used in an electrophotographic apparatus (such as a copying machine or a laser printer) is attached.

In order to realize a resource-recycling society, manufacturers of office equipment such as copiers, facsimiles, and printers disassemble, clean, and reassemble used products or units after collecting them from users and reuse them as parts, or as resin materials We are actively engaged in recycling activities. In order to reuse the parts used in these products or units, it is necessary to remove and clean the toner that is fine particle powder adhering to these units and parts. Reducing cost and environmental burden is a big issue.
In the case of a wet cleaning method using water or a solvent, there is a problem that the energy consumption and environmental burden of the waste liquid processing including toner and the drying processing after cleaning are large and costly.
On the other hand, in the case of dry cleaning methods using air blow, cleaning capability is not sufficient for toners with strong adhesion, and post-processing such as manual wiping is necessary, so cleaning is a bottleneck process in product reuse and recycling. It is one of.
In addition, the blast cleaning using dry ice has a problem in that a large amount of dry ice is consumed, so the running cost is high and the environmental load is large.

As a dry cleaning method that does not use water or a solvent, there is, for example, Patent Document 1. In this method, the chargeable member to be cleaned is stirred together with the elastically deformable contact member in the rotating cylinder, and the dust adhering force adhering to the member to be cleaned is weakened and removed while removing electricity. However, the contact force between the contact member and the member to be cleaned by stirring is not sufficient, and it is difficult to remove dust with strong adhesion.
Further, in the blasting apparatus as shown in Patent Document 2, since the granular solid is used as the cleaning medium, not only the dirt of the cleaning object is removed, but also the surface of the cleaning object is scraped and roughened into a satin-like shape, This is not applicable if the object is not allowed to be damaged by cleaning. Further, in a general method in which granular solid (cleaning medium) is supplied through a granular solid conveyance pipe and mixed in an air flow, when a flaky cleaning medium is used as the cleaning medium, the flaky cleaning medium is converted into a granular solid. Since the fluidity is poor as compared with the above, especially when a large amount of cleaning medium is supplied, the transport pipe is easily clogged and stable supply is difficult.
As means for solving the above problems, the present inventors have invented a cleaning method and a cleaning apparatus using a dry cleaning medium shown in Patent Document 3, and have solved the above problems.
However, in Patent Document 3, the energy use efficiency of the compressed air flow to be input is not sufficient, and there is room for reducing the cost and environmental load in the cleaning process.
In Patent Document 3, since the separation means such as a mesh is arranged between the air blow nozzle for accelerating the cleaning medium and the object to be cleaned, the air flow generated by the air blow nozzle is weakened and the collision speed of the cleaning medium is insufficient. In some cases, the cleaning ability is insufficient for the object to be cleaned with relatively strong adhesion.

Japanese Patent No. 3288462 Japanese Patent No. 3468995 JP 2007-029945 A

This patent solves the problems of the prior patent application.
In dry cleaning equipment using flaky cleaning media, the energy of compressed air flow is used efficiently to increase the frequency and speed at which the cleaning media collides with the target, thereby reducing environmental impact and improving cleaning efficiency. .

In the invention according to claim 1, comprising: a cleaning tank for accommodating a flexible cleaning medium made of flaky resin film, and a holding means for holding the object to be cleaned, the cleaned object the cleaning medium In the dry cleaning apparatus that removes the adhering matter adhering to the object to be cleaned by colliding with the cleaning object, the cleaning tank includes a cleaning medium acceleration nozzle and an auxiliary acceleration nozzle, and the cleaning medium acceleration nozzle includes the cleaning medium It has a convex structure that is arranged at a position below the object and that is composed of the wall surface of the cleaning tank with the tip of the cleaning medium acceleration nozzle as the apex, and the cleaning medium acceleration nozzle is directed toward the object to be cleaned. Compressed air is sprayed from the tip, and the cleaning medium is accelerated by the jet airflow to collide with the object to be cleaned. The auxiliary acceleration nozzle is disposed on the wall surface of the cleaning tank and moves downward along the wall surface. Generate airflow The flow along the air flow from the auxiliary accelerating nozzle on the wall of the cleaning tank to form the convex structure, and wherein the cleaning medium to be flying toward the tip of the cleaning medium accelerating nozzle.

In the invention according to claim 2, and further comprising a cleaning medium deflector for deflecting in a dry cleaning apparatus according to claim 1, the cleaning medium accelerated by the pre-Symbol cleaning medium accelerating nozzle to the object to be cleaned To do.

According to a third aspect of the present invention, in the dry cleaning apparatus according to the first or second aspect, the inner wall of the cleaning tank has a substantially cylindrical shape.
According to a fourth aspect of the present invention, in the dry cleaning apparatus according to the first or second aspect, the inner wall of the cleaning tank is substantially spherical.
According to a fifth aspect of the present invention, in the dry cleaning apparatus according to any one of the first to fourth aspects, a plurality of grooves are formed on the inner surface of the cleaning tank along the direction of the airflow in the cleaning tank. It is characterized by that.
According to a sixth aspect of the present invention, in the dry cleaning apparatus according to the fifth aspect, the pitch of the grooves is equal to or smaller than the size of the cleaning medium to be used.

According to the present invention, since the airflow generated by the first nozzle and the second nozzle is in substantially the same direction in the vicinity of the nozzles, a synergistic effect that further strengthens the airflow generated by the nozzles can be obtained. . That is, a loop-shaped flow is formed in the cleaning tank with a small amount of air consumption, and the cleaning medium can be repeatedly circulated without the cleaning medium remaining therein. Further, the speed of the cleaning medium can be increased by accelerating in two stages of the second nozzle and the first nozzle.
In other words, since the cleaning medium can be circulated with less energy consumption and the speed of the cleaning medium can be increased to collide with the object to be cleaned, the environmental load in the cleaning process can be reduced.

First, terms used in this specification will be described.
“Dry” cleaning refers to the use of a cleaning medium that is solid at room temperature without using a liquid such as water or a solvent as the cleaning medium.
“Airflow”, “air blow”, and “air nozzle” include not only general air flow but also various gas flows such as inert gas such as nitrogen gas, carbon dioxide gas, and argon gas. Similarly, “compressed air” includes the case where it is replaced with another compressed gas.
The “solid” cleaning medium is a material such as a metal, a resin, a porous body, or a cloth, and indicates a granular, rod-like, cylindrical, fibrous, or flaky solid.
“Flame-like” flexible cleaning media are resin film pieces, cloth pieces, paper pieces, metal pieces with an area of 1-1000 mm ² and a thickness of about 1-500 μm, rectangular, circular, elliptical, triangular, polygonal, Others refer to flaky solids of irregular shape.
The “substantially cylindrical shape” includes not only a complete cylinder but also an elliptic cylinder and a shape obtained by deforming a part of a cylindrical surface.
Similarly, the “substantially spherical shape” includes not only a perfect sphere but also a shape obtained by deforming a part thereof.
The directions of the two airflows are “substantially the same direction” means that the angle formed by the two airflow vectors at a predetermined position is 0 to 45 °.

In the following embodiments, products or units used in electrophotographic apparatuses such as copying machines and laser printers are disassembled as objects to be cleaned, and electrophotographic apparatuses such as copying machines and laser printers are used as objects to be removed. However, the present invention is not limited to this, and a general powder or dust depositing device or coating is not intended. The present invention can also be applied to a film removal apparatus. In this case, the type of the cleaning medium and the flow velocity of the air flow may be appropriately selected according to the properties of the object to be cleaned and the deposits.
For example, when the object to be cleaned is easily damaged, if a soft material such as a resin film and a thin material is used as the cleaning medium, the thin piece flexes flexibly so that the object to be cleaned is not damaged. In addition, when a strong removal force such as removal of a coating film is necessary, a strong removal action can be obtained by using a metal flake.

<About the cleaning action of flaky cleaning media>
Even dust and other deposits that are relatively strong and difficult to remove by air blow alone can be separated from the object to be cleaned by contacting and colliding with the cleaning medium accelerated by the air flow ejected from the nozzle. . In particular, when a lamellar cleaning medium is used, it is high due to the interaction with the airflow (high-speed flight, long dwell time, etc.) and the action at the time of contact / collision (scraping by edge, rubbing by sliding contact, etc.) Cleaning quality and cleaning efficiency can be obtained.
These are epoch-making features not found in conventional blast shot materials and barrel polishing media materials.

<About problems peculiar to lamellar cleaning media>
The flaky cleaning media are likely to adhere to the wall surface due to electrostatic force or the like, and the cleaning media are also likely to adhere to each other. And once it stays and accumulates in a layer form, the interaction force such as adhesion and friction between the cleaning media is large, and the fluidity is remarkably deteriorated as compared with the granular cleaning media. In addition, the flaky cleaning medium has a characteristic that the cleaning medium has a large area, and therefore, it tends to be clogged by covering the suction port and the flow path.
The cleaning apparatus disclosed in this patent has a configuration suitable for moving and cleaning a flaky cleaning medium with an air flow in a cleaning tank based on the characteristics and problems peculiar to the flaky cleaning medium.
In addition, in this specification, a wall surface refers to the inner wall surface (a bottom face, a side surface, a lid | cover, etc.) of a washing tank.
In addition, when the cleaning medium is carried using an air flow along the wall surface, the air flow is suppressed by being surrounded by the wall surface, and the flow velocity is maintained even at a position away from the nozzle. Can carry. When using a duct or hose to transport the cleaning medium by air, the cleaning medium may clog the duct or hose, but when transporting air using a wall, there is no risk of clogging because one side is open. There is also an effect.

FIG. 1 is a diagram for explaining a first embodiment of the present invention. FIG. 1A is a schematic cross-sectional view at the center, and FIG.
In the figure, reference numeral 1 is a cleaning tank, 2 is a cleaning medium accelerating nozzle, 3 is an auxiliary accelerating nozzle, 5 is a compressed air source, 6 is a solenoid valve, 7 is a separating means, 8 is an exhaust port, and 9 is a dust collector (filter). ), 10 is a switching valve, F is an air flow, R is a cleaning medium regeneration means, W is an object to be cleaned (work), and WH is a work holding means (work holder).
First, the configuration of the apparatus will be described.
Cleaning tank The cleaning tank 1 is a substantially cylindrical hollow body that accommodates the cleaning object W and the cleaning medium 4 (described later).
The bottom surface of the cleaning tank 1 has a central portion 1a protruding in a ridge shape, and a cleaning medium acceleration nozzle 2 is disposed. Similarly, the upper surface (opposite surface of the cleaning medium acceleration nozzle) 1b of the cleaning tank has a shape protruding in a ridge shape. When the air flow F2 ejected from the cleaning medium accelerating nozzle 2 does not collide with the object to be cleaned W, it collides with the ridge-like protrusion 1b and forms a loop-shaped circulation flow along the inner surface of the cleaning tank 1.

FIG. 2 is a view for explaining the auxiliary acceleration nozzle and the groove on the inner wall surface of the cleaning tank.
In the figure, reference numeral 1c denotes a groove on the wall surface, 4 denotes a cleaning medium, and T denotes a deposit.
A groove 1c may be formed in the circumferential direction of the cleaning tank 1 in order to promote the formation of a looped circulation flow in the cleaning tank. By forming the groove 1c, the flow is rectified and a stable loop-shaped circulation flow is formed. Further, by making the pitch of the grooves 1c smaller than the size (width and length) of the cleaning medium 4, the contact area between the inner wall of the cleaning tank 1 and the cleaning medium 4 is reduced, so that wear and frictional charging of the cleaning medium 4 are reduced. Effect is obtained.
Further, since a space is formed between the cleaning medium 4 and the cleaning tank 1, and the effect that the air flow F enters between the cleaning medium 4 and the cleaning medium 4 is floated is obtained, the friction between the inner wall of the cleaning tank 1 and the cleaning medium 4 is obtained. Is significantly reduced, and the problem of “deterioration of fluidity during deposition”, which is a problem peculiar to the lamellar cleaning medium 4, can be solved.
Specifically, a remarkable fluidizing effect was obtained by setting the pitch of the grooves 1c to about 1 to 5 mm for the laminar cleaning medium 4 having a width of several mm.

Workpiece holding means The cleaning object W can be set in the cleaning tank by the workpiece holding means WH.
The work holding means WH is composed of a cylindrical wire frame or the like, and accommodates the cleaning object W therein. One end of the work holder WH is pivotally supported with respect to the cleaning tank 1 as a rotating shaft, and is connected to a motor or the like (not shown) outside the cleaning tank 1. As the work holder WH rotates, the internal work W also rotates, and the entire surface of the work is cleaned.
Note that the work holding means WH in the present invention is not limited to the above-described method, and an appropriate method according to the shape and characteristics of the object to be cleaned W (screw fastening, pinching and use of holes in the object to be cleaned) And pinned etc.). However, it is desirable that the cleaning medium 4 has a structure and shape that prevents the cleaning medium 4 from contacting or colliding with the object to be cleaned W as much as possible.

Cleaning medium acceleration nozzle / auxiliary acceleration nozzle FIG. 3 is a diagram illustrating another arrangement example of the auxiliary acceleration nozzle provided on the inner wall surface of the cleaning tank.
FIG. 4 is a view showing a cross section of the cleaning medium acceleration nozzle.
In the figure, reference sign θF indicates an angle formed by two types of air currents in the vicinity of the cleaning medium acceleration nozzle.
On the inner bottom surface of the cleaning tank 1, a cleaning medium acceleration nozzle 2 is arranged in the central ridge-shaped portion 1 a in the direction of the rotation axis of the workpiece W. The nozzle ejection holes are arranged in a line along the ridge line of the ridge 1a.
In addition, auxiliary accelerating nozzles 3 are disposed on both inner bottom surfaces of the cleaning tank 1. The auxiliary acceleration nozzles 3 may be arranged in a row as shown in FIG. 2, or may be arranged dispersed on the inner surface of the cleaning tank as shown in FIG. The auxiliary acceleration nozzle 3 ejects an air flow along the wall surface of the cleaning tank 1 in the direction toward the cleaning medium acceleration nozzle 2. Both nozzles are supplied with compressed air from a compressed air source 5 such as a compressor, a pressure tank or a high pressure blower. Moreover, the solenoid valve 6 etc. which can control the supply of the compressed air to each nozzle may be used, and the airflow of the nozzle may be automatically controlled by a command from the control device.
The air flow F3 generated in the cleaning tank 1 by the auxiliary acceleration nozzle 3 flows along the wall surface, and in the wall surface near the cleaning medium acceleration nozzle 2, substantially the same direction as the ejection direction of the air flow F2 from the cleaning medium acceleration nozzle (the angle θF formed). 0 to 45 °).

FIG. 5 is a cross-sectional view for explaining the airflow in the vicinity of the auxiliary acceleration nozzle.
In the figure, reference sign θF ′ indicates an angle formed by two types of air currents in the vicinity of the auxiliary acceleration nozzle.
An airflow (circulation flow in the cleaning tank) F2 generated in the cleaning tank 1 by the cleaning medium acceleration nozzle 2 is substantially in the same direction as the ejection direction of the airflow F3 from the auxiliary acceleration nozzle 3 on the wall surface in the vicinity of the auxiliary acceleration nozzle 3. The angle θF ′ is 0 to 45 °.
These are achieved by the shape of the cleaning tank 1 and the arrangement (position and posture) of the cleaning medium acceleration nozzle 2 / auxiliary acceleration nozzle 3. Energy loss due to interference between the airflow generated from the nozzle and the airflow in the cleaning tank 1 is small, and the cleaning medium can be effectively accelerated.
Note that, in the central portion of the cleaning tank 1, since the air flow F3 of the auxiliary accelerating nozzle 3 and the air flow F2 of the cleaning medium accelerating nozzle 2 are combined, a very strong flow is generated, so that the cleaning ability can be remarkably enhanced.
In the present invention, the configuration shown in FIG. 4 and the configuration shown in FIG. 5 are satisfactory if both are present, but at least one of them is sufficient.

Cleaning medium regeneration means On the inner wall surface of the cleaning tank 1, a cleaning medium regeneration means R is provided. The cleaning medium regeneration means R has a function of separating the cleaning medium 4 and the deposit T and discharging only the deposit T to the outside of the cleaning tank 1. Specifically, it is composed of separation means (punching plate or net, mesh, etc.) 7 having a number of openings smaller than the size of the cleaning medium 4 and an exhaust port 8. The separation means 7 constitutes a part of the inner wall of the cleaning tank 1. The deposit T such as dust that has passed through the separation means 7 and the exhaust port 8 is further separated by a filter or the like.
By the airflows F2 and F3 blown into the cleaning tank 1 by the cleaning medium acceleration nozzle 2 and the auxiliary acceleration nozzle 3, an airflow F4 is generated in the separation means 7 from the inside of the cleaning tank 1 to the outside. Further, the exhaust port 8 is connected to a dust collector 9 outside the washing tank with a hose or the like, and sucked with a negative pressure, thereby increasing the flow rate of the air flow F4 in the separation means 7 and increasing the separation and discharge capability of the deposit T. It is preferable to do.
In order to prevent the cleaning medium 4 from being sucked into the separating means 7 and completely separating the separating means 7, the plurality of cleaning medium regenerating means R (for example, Ra and Rb) are alternately switched and operated. The cleaning medium regeneration means R is preferably operated intermittently. Specifically, the plurality of dust collectors 9 respectively connected to the plurality of separation means 7 are operated by alternately switching them, or the plurality of separation means 7 are distributed from one dust collector 9 by the switching valve 10. What is necessary is just to switch and operate | move. In FIG. 1, the block diagram in the case of switching two separation means 7a and 7b with the switching valve 10 is shown.
By providing a plurality of cleaning medium regeneration means R and shifting their operation timing, any of the cleaning medium regeneration means R is always in operation, so that the regeneration capability of the cleaning medium 4 can be kept high.

<Device operation>
The workpiece W is set on the workpiece holding means WH from a workpiece loading / unloading port (not shown) arranged on the side surface or the upper surface of the cleaning bath 1, the workpiece loading / unloading port is closed, and the inside of the cleaning bath 1 is closed. Seal and perform the cleaning step detailed below.
Cleaning process (1) When compressed air is supplied to the auxiliary acceleration nozzle 3, an air flow F3 along the bottom surface and the wall surface of the cleaning tank 1 is generated, so that the cleaning medium 4 that has fallen on the bottom surface of the cleaning tank 1 in the initial state is Then, it is carried along the bottom surface of the cleaning tank to the cleaning medium acceleration nozzle 2.
Moreover, as soon as the cleaning medium 4 floating in the space in the cleaning tank 1 falls to the bottom surface of the cleaning tank due to gravity, the cleaning medium 4 is carried to the cleaning medium acceleration nozzle 2 on the flow F3 along the bottom surface and the wall surface of the cleaning tank. .
In the configuration of the present invention, since the flow F along the bottom surface and the wall surface of the cleaning tank is formed, the cleaning medium 4 does not accumulate and stay on the bottom surface of the cleaning tank, and circulates in the cleaning tank 1 efficiently. The frequency of the cleaning medium 4 that collides with the object W can be dramatically increased.

(2) The cleaning medium 4 transported to the cleaning medium acceleration nozzle 2 is further accelerated in the direction of the cleaning object W by the air flow F2 ejected from the cleaning medium acceleration nozzle 2, and collides with the cleaning object W at a high speed (hereinafter referred to as “cleaning medium acceleration nozzle 2”). When there is no need to distinguish the nozzle mouth, it is simply called the air flow F).
In the configuration of the present invention, since the cleaning medium acceleration nozzle 2 further accelerates the cleaning medium 4 accelerated by the auxiliary acceleration nozzle 3, the speed of the cleaning medium 4 can be dramatically increased. In addition, since the air flow F3 generated by the auxiliary acceleration nozzle 3 and the air flow F2 generated by the cleaning medium acceleration nozzle 2 are in a direction in which they mutually strengthen, there is little energy loss, and the cleaning medium 4 is efficiently transferred with less input energy (consumed air consumption). It is possible to accelerate.

(3) When the cleaning medium 4 contacts or collides with the cleaning target W at high speed, the deposit T attached to the cleaning target W is knocked down. The deposit T and the cleaning medium 4 struck down are carried to the cleaning medium regenerating means R on the air flow F in the cleaning tank 1.
(4) Of the deposit T and the cleaning medium 4 carried on the airflow F, the deposit T passes through the opening hole of the separating means 7 and is discharged from the cleaning tank 1. On the other hand, the cleaning medium 4 collides with the separation means 7, and the deposit T attached to the cleaning medium 4 is also separated by the friction with the separation means 7 and the impact and vibration caused by the collision (“regeneration of the cleaning medium” "Action).
(5) By intermittently stopping the suction action of the cleaning medium regeneration means R, the cleaning medium 4 sucked by the cleaning medium regeneration means R is separated from the cleaning medium regeneration means R and is circulated in the cleaning tank 1 It is carried again on F.

By repeating the operations (1) to (5), the cleaning medium 4 can be made to collide with the cleaning object W at a high speed while circulating in the cleaning tank 1, and the deposit T can be removed.
Furthermore, by rotating the work holder WH and changing the posture of the cleaning target W, the cleaning medium 4 can collide with the entire surface of the cleaning target W without unevenness.
According to the configuration of the present invention, even if dust is relatively strong and difficult to remove by air blow alone, the cleaning medium 4 flying at high speed can be separated from the cleaning object W by contact and collision. it can.
In particular, when the lamellar cleaning medium 4 is used, high cleaning quality and cleaning efficiency can be obtained for the above-described reason, and the excellent effect that the cleaning target W is not damaged is exhibited. Further, since the dust T adhering to the cleaning medium 4 is effectively removed by the cleaning medium regenerating means R, and the cleanliness of the cleaning medium 4 is always maintained, the dust T adhering to the cleaning medium 4 is cleaned. High cleaning quality is obtained without reattaching to the object W.

FIG. 6 is a diagram showing another embodiment of the present invention. FIG. 1A is a schematic cross-sectional view at the center, and FIG.
On both side surfaces of the cleaning tank, the cleaning medium acceleration nozzle 2 is arranged so as to eject an airflow downward along the wall surface of the cleaning tank.
A ridge-shaped cleaning medium deflecting member is disposed at the bottom of the cleaning tank, and the air flow F2 and the cleaning medium 4 from the cleaning medium acceleration nozzle 2 flow along the bottom surface of the cleaning tank and the cleaning medium deflecting member 1a. It is deflected upward toward the cleaning object W.
The airflow F2 and the cleaning medium 4 from the cleaning medium acceleration nozzle 2 collide with the cleaning object W or the cleaning tank wall surface, and then are accelerated again by the cleaning medium acceleration nozzle 2 and circulate in the cleaning tank. A loop-shaped circulation flow F is formed in the cleaning tank, and the air flow F2 from the cleaning medium acceleration nozzle 2 is ejected in the direction of strengthening the circulation flow, so that the loss of flow is small and the energy of compressed air is used without waste. Can do. (Since the cleaning medium 4 is accelerated using the circulating flow formed in the cleaning tank, the cleaning medium 4 can be accelerated with less consumption of compressed air)
Further, since the air flow from the cleaning medium acceleration nozzle 2 acts strongly on the bottom surface of the cleaning tank, the cleaning medium 4 does not stay on the bottom surface. Therefore, the frequency with which the cleaning medium 4 comes into contact with the cleaning object W is increased, and the cleaning can be completed in a short time. That is, the utilization efficiency of compressed air energy is increased, and cleaning can be performed with less energy consumption.
Other apparatus configurations and operations are the same as those in the first embodiment.

FIG. 7 is a view showing still another embodiment of the present invention. FIG. 1A is a schematic cross-sectional view at the center, and FIG.
In this embodiment, the auxiliary accelerating nozzle 3 is disposed at the center of the bottom surface, and the cleaning medium accelerating nozzle 2 is disposed at a height near the center of both side surfaces of the cleaning tank.
When the auxiliary accelerating nozzle 3 blows the airflow F3 to both sides along the bottom surface of the cleaning tank, a loop-shaped airflow F as shown by the arrows in the figure is generated in the cleaning tank. The cleaning medium 4 rises along the wall surface of the cleaning tank and is sent to the vicinity of the cleaning medium acceleration nozzle 2.
The cleaning medium acceleration nozzle 2 further accelerates the cleaning medium 4 accelerated by the auxiliary acceleration nozzle 3 toward the cleaning object W. Here, since the direction of the air flow F3 generated in the cleaning tank 1 by the auxiliary acceleration nozzle 3 is substantially the same as the ejection direction of the cleaning medium acceleration nozzle 2 on the wall surface in the vicinity of the cleaning medium acceleration nozzle 2, the auxiliary acceleration nozzle 3 The cleaning medium accelerating nozzle 2 can further increase the speed without wasting the energy of the airflow and the kinetic energy of the cleaning medium 4.
The cleaning medium 4 that has collided with the object to be cleaned W falls downward due to gravity and is carried again by the air flow F3 of the auxiliary acceleration nozzle 3. A part of the cleaning medium 4 is transported toward the separating means 7 and subjected to a regeneration process, and then falls downward.
Unlike the first and second embodiments, the work holder WH is supported from above and can be moved up and down. The relative position between the cleaning medium acceleration nozzle 2 and the cleaning target W is changed by the lifting / lowering operation of the work holder WH, and the entire surface of the cleaning target W can be cleaned.
Other apparatus configurations and operations are the same as those in the first embodiment.

FIG. 8 is a view showing still another embodiment of the present invention.
In this embodiment, the cleaning tank 1 has a substantially spherical shape.
The cleaning medium acceleration nozzle 2 blows out the air flow F2 upward from the center of the bottom surface of the cleaning tank 1.
The auxiliary accelerating nozzle 3 is arranged on the circumference near the center of the cleaning tank wall surface so as to eject the air flow F3 downward along the wall surface.
A cleaning medium deflecting member 1a is disposed around the cleaning medium acceleration nozzle 2 at the center of the bottom of the cleaning tank 1, and deflects the air flow F3 and the cleaning medium 4 accelerated by the auxiliary acceleration nozzle 3 upward. The airflow F3 of the plurality of auxiliary acceleration nozzles 3 arranged on the circumference of the cleaning tank 1 merges at the center of the bottom of the cleaning tank, and becomes a strong upward jet toward the cleaning object W.
It is preferable to form grooves radially from the cleaning medium deflecting member 1a on the inner wall of the cleaning tank so that the flow from the auxiliary acceleration nozzle 3 toward the cleaning medium deflecting member 1a is smooth.
A cleaning medium regeneration means R is disposed on the upper part of the cleaning tank 1.
In the center of the cleaning tank, a reed-shaped work holder WH for storing the object to be cleaned W is installed.
Other apparatus configurations and operations are the same as those in the second embodiment.

It is a figure for demonstrating the 1st Example of this invention. It is a figure for demonstrating the auxiliary | assistant acceleration nozzle and the groove | channel of a wall surface. It is a figure which shows the other example of arrangement | positioning of an auxiliary acceleration nozzle. It is a figure which shows the cross section of a cleaning medium acceleration nozzle. It is a figure for demonstrating the airflow in the vicinity of an auxiliary acceleration nozzle. It is a figure which shows the other Example of this invention. It is a figure which shows the further another Example of this invention. It is a figure which shows the further another Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cleaning tank 2 Cleaning medium acceleration nozzle 3 Auxiliary acceleration nozzle 4 Cleaning medium 5 Compressed air source 7 Separation means F Air current W Cleaning object (workpiece)
WH Work holding means (Work holder)

Claims (6)

A cleaning tank for accommodating a flexible cleaning medium made of flaky resin film,
Holding means for holding the object to be cleaned;
In the dry cleaning apparatus for removing the adhering matter adhering to the cleaning target by colliding the cleaning medium with the cleaning target,
A cleaning medium acceleration nozzle and an auxiliary acceleration nozzle in the cleaning tank ;
The cleaning medium accelerating nozzle is disposed at a position below the cleaning object, and has a convex structure composed of a wall surface of the cleaning tank with the tip of the cleaning medium accelerating nozzle as a vertex, and the cleaning object Injecting compressed air from the tip of the cleaning medium accelerating nozzle toward the object, accelerating the cleaning medium with a jet stream and colliding with the object to be cleaned,
The auxiliary acceleration nozzle is disposed on the wall surface of the cleaning tank, generates an air flow downward along the wall surface, and causes the air flow from the auxiliary acceleration nozzle to form the convex structure along the wall surface of the cleaning tank. A dry cleaning apparatus , wherein the cleaning medium is allowed to flow toward the tip of the cleaning medium acceleration nozzle . The dry cleaning apparatus according to claim 1,
Dry cleaning apparatus characterized by having a cleaning medium deflecting member that deflects the cleaning medium accelerated by the pre-Symbol cleaning medium accelerating nozzle to the object to be cleaned. The dry cleaning apparatus according to claim 1 or 2,
A dry cleaning apparatus, wherein an inner wall of the cleaning tank has a substantially cylindrical shape. The dry cleaning apparatus according to claim 1 or 2,
A dry cleaning apparatus, wherein an inner wall of the cleaning tank has a substantially spherical shape. In the dry-cleaning apparatus according to any one of claims 1 to 4,
Dry cleaning apparatus characterized by forming a number of grooves on the inner surface of the washing tub along the direction of air flow in the cleaning tank. In the dry-cleaning apparatus according to claim 5,
A dry cleaning apparatus, wherein the pitch of the grooves is equal to or less than the size of a cleaning medium to be used.

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