JP2009285557A - Washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing device which has the low possibility causing failure, is inexpensive and has high uniformity of washing. <P>SOLUTION: A plurality of injectors 5B, 5L, 5R, 5T can generate streams containing air bubbles BB in washing liquid 7 and are arranged around a conveyor 3 such that the streams go toward the conveyor 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cleaning apparatus, and more particularly to a cleaning apparatus for cleaning an object to be cleaned with a cleaning liquid.

  Until now, in the field of industrial degreasing and cleaning, fluorocarbon solvents, organic solvents, petroleum solvents and the like have been frequently used as cleaning liquids. However, it has been revealed that these substances are causative substances that cause environmental destruction such as ozone layer destruction, river, ocean, and groundwater water pollution. For this reason, development of a cleaning technique with a small environmental load is desired in place of the cleaning method using these solvents.

  In the conventional dissolution cleaning in which the oil is dissolved in the cleaning liquid, there is a problem that the cleaning power decreases as the number of cleaning processes increases. This is because the oil adhering to the object to be cleaned is degreased and cleaned by dissolving it in the cleaning liquid, and as the oil concentration in the cleaning liquid approaches its saturated concentration, the ability of the cleaning liquid to dissolve the oil decreases. is there. For this reason, it was necessary to periodically change the cleaning liquid in accordance with the decrease in the capacity.

  In addition, a cleaning apparatus that puts an object to be cleaned into a rotating body such as a barrel and degreases and cleans it is a batch process. That is, an amount of the object to be cleaned that can be accommodated in the barrel is put into the cleaning tank at a time, and the object to be cleaned is taken out after the cleaning is completed. At this time, an apparatus for removing the barrel from and into the cleaning tank is required, and there is a problem that the equipment is increased in size. Further, in cleaning by batch processing, the product to be cleaned stays before and after the cleaning process. That is, work in progress increases. As a result, there has been a problem that the manufacturing cost increases.

On the other hand, for example, Patent Document 1 discloses a continuous cleaning apparatus that does not use a barrel. According to this publication, the facility can be reduced in size and continuous cleaning can be performed.
JP 2000-218246 A

  In the cleaning apparatus of the above publication, the cleaning liquid vibrated by the vibrating body acts on the object to be cleaned. In order to prevent the position of the object to be cleaned from deviating from the predetermined transport coordinates due to this action, in addition to the mesh conveyor for loading and transporting the object to be cleaned, a mesh conveyor for further pressing the object to be cleaned from above is separately provided. Necessary. That is, two mesh conveyors are required. For this reason, the following problems have arisen.

  First, the complexity of the equipment increased the possibility of failure. In addition, since the number of parts of the device increases, the price of the device may increase. Further, since the contact area between the object to be cleaned and the mesh conveyor is large, the portion where the cleaning liquid cannot act on the surface of the object to be cleaned is large. For this reason, there has been a problem that the non-uniformity of the cleaning becomes large.

  Therefore, an object of the present invention is to provide a cleaning apparatus that has a low possibility of failure, is inexpensive, and has high cleaning uniformity.

  The cleaning device of the present invention is a cleaning device for cleaning an object to be cleaned with a cleaning liquid containing bubbles, and includes a cleaning tank, a conveyor, and a plurality of injectors. The cleaning tank is for holding a cleaning liquid. A conveyor is for conveying a to-be-cleaned object in a washing | cleaning liquid. The plurality of injectors can generate a flow including bubbles in the cleaning liquid, and are arranged around the conveyor so that the flow is directed toward the conveyor.

  According to the cleaning apparatus of the present invention, since a plurality of injectors that generate a flow in the cleaning liquid are provided, it is possible to generate flows in different directions. Therefore, it is possible to prevent the deviation of the object to be cleaned due to the flow of the cleaning liquid from being biased in one direction. For this reason, the mesh conveyor for pressing down a to-be-cleaned object in order to prevent gap becomes unnecessary. Therefore, it is possible to obtain a cleaning apparatus that has a low possibility of failure, is inexpensive, and has high cleaning uniformity.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
First, a schematic configuration of the cleaning apparatus according to the present embodiment will be described. FIG. 1 is a diagram schematically showing a configuration of a cleaning apparatus according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view schematically showing the configuration of the cleaning tank of FIG. 1 and its periphery. FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. FIG. 4 is a plan view schematically showing the structure of the support included in the cleaning device according to Embodiment 1 of the present invention. FIG. 5 is a plan view (A) and a front view (B) schematically showing configurations of a cleaning tank and an overflow tank included in the cleaning device according to Embodiment 1 of the present invention. In FIG. 1, the transport system is not shown.

  Referring mainly to FIG. 2 and FIG. 3, the cleaning apparatus of the present embodiment transports the article to be cleaned 8 (left end in FIG. 2) into the cleaning liquid 7 by the conveyor 3, and the object to be cleaned 8 ( In FIG. 3), the object to be cleaned 8 is cleaned by spraying the flow of the cleaning liquid 7 containing the fine bubbles BB by a plurality of injectors 5 to obtain the object to be cleaned 8 (the right end in FIG. 2). It is. This cleaning apparatus includes a cleaning tank 1, a conveyor support 2, a conveyor 3, a chute 4, a plurality of injectors 5, a support 6, a screw 9, an overflow tank 13, a recovery tank 15, a circulation A pump 16, a water branch manifold 17, an air introduction part 18, and an air branch manifold 19 are provided.

  The cleaning tank 1 is for holding the cleaning liquid 7. The cleaning liquid 7 is composed of water as a main component and a very small amount of additives essential for generating fine bubbles.

  The conveyor 3 has a part (left part in FIG. 2) for transporting the object 8 to be cleaned input from the chute 4 into the cleaning tank 1, and a conveying direction while immersing the object 8 in the cleaning liquid 7 in the cleaning tank 1. It has a portion (a central portion in FIG. 2) that transports in the direction from the left to the right in FIG. 2 and a portion (a right portion in FIG. 2) that carries the object to be cleaned 8 out of the cleaning tank 1. Moreover, the conveyor 3 can let the bubble BB pass, for example, is a stainless steel mesh conveyor. The mesh diameter of the mesh conveyor is preferably as large as possible so that the article to be cleaned 8 does not fall. As a result, the fine bubbles BB from below the conveyor 3 can efficiently reach the article 8 to be cleaned. The depth at which the conveyor 3 is immersed in the cleaning liquid 7 is kept constant by the conveyor support 2. Further, the conveyor 3 is a plate-like protrusion in a direction perpendicular to the conveying direction and along the vertical direction in order to prevent the object to be cleaned 8 from rolling off at an inclined part (an oblique part in FIG. 2). It is preferable to have objects (not shown) at regular intervals.

  The injectors 5 are provided around the conveyor 3 so that the injectors 5 are immersed in the cleaning liquid 7 and the outlets face the conveyor 3. Further, the injector 5 can eject a mixture of the cleaning liquid 7 supplied from the water branch manifold 17 (FIG. 1) and the air supplied from the air branch manifold 19 (FIG. 1) from the jet outlet. It is configured as follows. Thereby, the flow containing the bubble BB which goes to the conveyor 3 in the washing | cleaning liquid 7 can be generated. More specifically, the injector 5 includes injectors 5B, 5T, 5L, and 5R. The injector 5 </ b> B is located below the conveyor 3 and is directly attached to the bottom of the cleaning tank 1. The injectors 5T, 5L, and 5R are located above the conveyor 3, and the positions are held by being attached to the support 6 fixed to the conveyor 3.

  Referring mainly to FIG. 4, the support 6 has a block body 10, a crosslinked body 11, and a mesh 12. The block body 10 has a female screw to which the injectors 5T, 5L, and 5R are attached. The cross-linked body 11 holds the block body 10 at an appropriate position from the object 8 to be cleaned. The mesh 12 connects adjacent cross-linked bodies 11 and is made of a stainless steel mesh. Moreover, the support body 6 has a long hole in the vertical direction on its side surface, and as shown in FIG. 3, it is fixed to the conveyor 3 using a screw 9 that passes through this long hole.

  Further, the block bodies 10 located on the side surfaces are arranged symmetrically in the transport direction. Thereby, as shown in FIG. 3, the pairs of injectors 5 </ b> L and 5 </ b> R are arranged so that the flow including the fine bubbles BB acts symmetrically on the object 8 to be cleaned. The block body 10 located on the upper surface is disposed at a position facing the injector 5B in the vertical direction. Thereby, the pair of injectors 5T and 5B is arranged so that the flow including the fine bubbles BB acts on the article 8 to be cleaned symmetrically.

  The inclination angle of the pair of injectors 5L, 5R is preferably in the range of 15 ° to 75 °, particularly in the range of 30 ° to 60 ° from the vertical direction. Further, by arranging a plurality of pairs of injectors 5L and 5R along the transport direction so that the inclination angles of the respective pairs are different, the entire surface of the article to be cleaned 8 can be more uniformly cleaned.

  Note that the cleaning apparatus of the present embodiment performs degreasing cleaning by causing the flow of the cleaning liquid 7 containing the fine bubbles BB to act on the object 8 to be cleaned. Therefore, the cleaning power varies greatly depending on the installation position of the injector 5. If the distance from the injector 5 to the object 8 to be cleaned is short, the flow including the fine bubbles BB can be made to act strongly on the object 8 to be cleaned, but the area receiving the action is reduced. On the contrary, if the distance from the injector 5 to the object 8 to be cleaned is long, the action of the flow including the fine bubbles BB on the object 8 to be cleaned becomes weak, but the area receiving the action becomes large.

  The article to be cleaned 8 conveyed on the conveyor 3 is preferably uniformly and strongly affected by the flow including the fine bubbles BB in the conveyance area effective for cleaning. Considering the balance between the uniformity and the strength of this action, under the general cleaning liquid supply condition in which the cleaning liquid 7 is supplied to each injector 5 at 4 to 10 liters / minute, The arrangement interval is preferably in the range of 30 to 100 mm, and the distance from the ejection port of the injector 5 to the article to be cleaned 8 is preferably in the range of 20 to 100 mm. More specifically, for example, the arrangement interval of the injectors 5 along the conveying direction of the object 8 to be cleaned can be set to 70 mm, and the distance from the jet port of the injector 5 to the object 8 to be cleaned can be set to 50 mm.

Next, the resupply part of the cleaning liquid 7 in the cleaning apparatus of the present embodiment will be described in detail.
Referring mainly to FIG. 1, the resupply unit includes an overflow tank 13, a recovery tank 15, a circulation pump 16, a water branch manifold 17, an air introduction part 18, and an air branch manifold 19. Become.

  As shown in FIG. 5, the overflow tank 13 has a toy-shaped portion and a drain hole 14. The toy-shaped part surrounds the entire periphery of the cleaning tank 1 in order to collect the cleaning liquid 7 overflowed from the cleaning tank 1. The bottom surface of the toy-shaped portion has an inclination that becomes lower toward the drain hole 14.

  A recovery tank 15 is disposed below the drain hole 14 so that the drainage from the drain hole 14 can be recovered. Further, the water absorption side of the circulation pump 16 is connected to the lower side of the collection tank 15. A water branch manifold 17 is connected to the drain side of the circulation pump 16. A plurality of injectors 5 are connected to the water branch manifold 17. Thereby, the injector 5 can receive the supply of the cleaning liquid 7 for generating the flow of the cleaning liquid 7 from the water branch manifold 17. Each injector 5 is connected to an air introduction portion 18 via an air branch manifold 19. Thereby, the injector 5 can receive the supply of air for generating the bubbles BB from the air branch manifold 19.

Next, a cleaning method using the cleaning apparatus of this embodiment will be described.
First, handling of the article 8 to be cleaned in the cleaning method will be described.

  With reference to FIG. 1, the article 8 to be cleaned is put into the chute 4. The object to be cleaned 8 is, for example, a copper-based press-processed product, a cut-processed product, an iron-based press-processed product, or a cut-processed product. In these, press oil, cutting oil used at the time of processing, and processing powder generated at the time of processing are attached as deposits. This deposit is a target to be removed by cleaning.

  The object to be cleaned 8 is transferred to the conveyor 3 through the chute 4. The article to be cleaned 8 is conveyed by the conveyor 3 and immersed in the cleaning liquid 7 in the cleaning tank 1. While the object to be cleaned 8 is transported horizontally while being immersed in the cleaning liquid 7 on the conveyor 3, the cleaning liquid 7 containing fine bubbles BB ejected from a plurality of injectors 5 attached so as to surround the conveyor 3. It is degreased and washed by being exposed to the flow of water.

  Referring to FIG. 3, each of the pair of injectors 5 </ b> L and 5 </ b> R generates a flow of cleaning liquid 7 that applies a pair of forces FL and FR that oppose each other on the conveyor 3. In other words, the article to be cleaned 8 receives a rightward force FL and a leftward force FR in the drawing on the conveyor 3. As the two forces FL and FR antagonize, the position of the object 8 in the left-right direction is held almost stably. Each of the pair of injectors 5B and 5T generates a flow of the cleaning liquid 7 that applies a pair of opposing forces FB and FT to the object to be cleaned 8 in a cross-sectional view shown in FIG. That is, the article to be cleaned 8 receives a force FB that is released upward from the conveyor 3 and a force FT that is pressed against the conveyor 3. Since the force FT competes with the force FB, the article 8 to be cleaned is prevented from floating from the conveyor 3.

  With reference to FIG. 2, the cleaned object 8 is carried out of the cleaning tank 1 by the conveyor 3 as it is. As a result, a cleaned object 8 (object to be cleaned 8 at the right end in FIG. 2) is obtained.

Next, the handling of the cleaning liquid 7 in the cleaning method will be described.
Referring mainly to FIG. 1, the fine bubbles BB contained in the cleaning liquid 7 injected into the cleaning tank 1 from the injector 5 adhere to the object 8 to be cleaned by colliding with the object 8 to be cleaned. Various contaminants, particularly oil, are adsorbed on the surface of the bubble BB. The bubbles BB are lifted by their own buoyancy and reach the surface of the cleaning liquid 7. The bubble BB reaching the liquid level is broken by contact with the air layer. As a result, the contaminants adhering to the object 8 to be cleaned are contained in the surface layer of the cleaning liquid 7 in the cleaning tank 1.

  The surface layer of the cleaning liquid 7 overflows into the overflow tank 13. The overflowing cleaning liquid 7 is recovered in the recovery tank 15 via the drain hole 14. In the collection tank 15, the contaminant and the cleaning liquid 7 are separated due to the difference in specific gravity. Thereby, an upper layer containing a large amount of contaminants is formed on the surface side of the cleaning liquid 7 in the recovery tank 15, and a lower layer containing no contaminants or containing less contaminants is formed below the upper layer. The lower layer cleaning liquid 7 is sucked up by the circulation pump 16 and supplied to the water branch manifold 17. Then, the cleaning liquid 7 is supplied to the injector 5 by the water branch manifold 17.

  The air taken in from the air introduction unit 18 is sent to each injector 5 via the air branch manifold 19. The cleaning liquid 7 containing the fine bubbles BB by the air is injected from the injector 5 into the cleaning tank 1.

  According to the present embodiment, as shown in FIG. 3, since a plurality of injectors 5 for generating a flow in the cleaning liquid 7 are provided, flows in different directions can be generated. Therefore, it is possible to prevent the deviation of the article 8 to be cleaned due to the flow of the cleaning liquid 7 from being biased in one direction. For this reason, it is not necessary to further provide a mesh conveyor for pressing the article 8 to be cleaned in addition to the conveyor 3 in order to prevent deviation. Therefore, the apparatus configuration can be simplified, and as a result, a cleaning apparatus with low possibility of failure, low cost, and high cleaning uniformity can be obtained.

  For example, the injectors 5L and 5R are attached symmetrically by installing the block body 10 on the support 6 symmetrically. As a result, a flow including the fine bubbles BB acts symmetrically on the cleaning liquid 7 so that the entire surface of the object to be cleaned 8 can be cleaned uniformly, and deviation from the transport coordinates of the object to be cleaned 8 can be minimized. You can stay.

  Further, as shown in FIG. 3, supports 6 are disposed on both sides of the conveyor 3 in the region where the article 8 to be cleaned receives the flow of the cleaning liquid 7. The support 6 prevents the article to be cleaned 8 from falling from the conveyor 3.

  Moreover, since the washing | cleaning liquid 7 uses the water in which only the small amount of the additive essential for the production | generation of a fine bubble was thrown in, the rinse process is unnecessary. For this reason, a rinse tank is unnecessary and degreasing cleaning in a single tank is possible. Furthermore, since the cleaning liquid 7 is almost water, the deterioration rate of the conveyor 3 is very slow, and the solid matter derived from the cleaning liquid that adheres to the conveyor 3 and the cleaning tank 1 is also small. Therefore, the maintenance labor can be reduced.

  Further, the separation of contaminants in the recovery tank 15 (FIG. 1) is performed using a specific gravity difference. Therefore, it is not necessary to use a filter for removing contaminants during normal operation of the apparatus. When the amount of contaminants accumulated in the upper layer of the recovery tank 15 exceeds a predetermined amount, it may be necessary to regenerate the entire cleaning liquid 7 in the apparatus by using a filter or the like. However, by using the collection tank 15, the frequency of this regeneration process is greatly reduced.

  Further, when the surface layer of the cleaning liquid 7 in the cleaning tank 1 overflows, foreign matter, particularly oil, removed from the object to be cleaned 8 by the fine bubbles BB can be drained to the recovery tank 15 instantaneously. Therefore, the cleaning liquid 7 in the cleaning tank 1 can be kept clean.

  Also, in the conventional batch cleaning, it is difficult to efficiently apply the flow of the cleaning liquid containing the fine bubbles BB to the object to be cleaned. For example, the object to be cleaned is put into a rotating body such as a barrel and degreased and cleaned. In this case, a part of the large amount of objects to be cleaned in the barrel is always located at the center of the group of objects to be cleaned, which is difficult to interact with the flow containing the fine bubbles BB. There is a problem that it takes a lot of time to perform uniform cleaning. The cleaning apparatus of the present embodiment introduces the articles 8 to be cleaned continuously introduced into the cleaning area without overlapping each other by the conveyor 3 and efficiently causes the flow including the fine bubbles BB to act on the surface thereof. It is possible. For this reason, cleaning in a short time is possible.

(Embodiment 2)
FIG. 6 is a diagram schematically showing a planar layout of the conveyor and injector of the cleaning device in the second embodiment of the present invention. Referring mainly to FIG. 6, injectors 5 </ b> L and 5 </ b> R of the cleaning device of the present embodiment are arranged in a staggered manner along the conveyance direction of conveyor 3 (the direction from the left to the right in the drawing) in plan view. Has been. Correspondingly, the block bodies 10 of the support body 6 (FIG. 4) are also arranged in a staggered manner.

  Since the configuration other than the above is substantially the same as the configuration of the first embodiment described above, the same or corresponding elements are denoted by the same reference numerals, and description thereof is not repeated.

  Next, operation | movement of the washing | cleaning apparatus of this Embodiment is demonstrated. The object to be cleaned 8 put into the cleaning device is conveyed by the conveyor 3 and enters the vicinity area of the injector 5R that is the first irradiation area (the vicinity area of the leftmost injector 5R in the drawing). Then, the article to be cleaned 8 is irradiated with the flow of the cleaning liquid 7 (not shown in FIG. 6) containing the fine bubbles BB ejected from the injector 5R disposed on one side (downward in the drawing) of the conveyor 3. It moves on the end of the conveyor 3 on the other side (upper side in the figure). Thereafter, the object to be cleaned enters the irradiation area of the next injector 5L (injector 5L attached to the opposite side of the first injector 5R) by the conveyor 3 and is irradiated with the flow in the opposite direction to the original position (initial To the side where the injector 5R is attached). While repeating this operation, the article 8 to be cleaned moves on the conveyor 3 in a zigzag manner.

  According to the present embodiment, the injectors 5L and 5R arranged in a staggered manner on both sides along the conveying direction of the conveyor 3 alternately irradiate the object 8 to be cleaned with the flow containing the fine bubbles BB. Thereby, both side surfaces (upper and lower surfaces in the figure) of the article 8 to be cleaned can be cleaned uniformly. Moreover, since the flow containing the fine bubbles BB can be applied to both side surfaces of the object 8 from a short distance, higher cleaning power can be obtained.

(Embodiment 3)
FIG. 7 is a plan view (A) and a front view (B) schematically showing configurations of a cleaning tank and an overflow tank of the cleaning device according to Embodiment 3 of the present invention. Referring to FIG. 7, the cleaning apparatus according to the present embodiment has a cleaning liquid 7 along a direction that intersects the conveyance direction (the direction from left to right in FIG. 7) of conveyor 3 (not shown in FIG. 7). It has a partition plate 20 that separates the liquid level (not shown in FIG. 7). The installation position of the partition plate 20 depends on the flow rate of the cleaning liquid 7 supplied to the injector 5, but in the region where the flow rate is 4 liters / minute to 10 liters / minute used for general degreasing cleaning, the injector 5 installation position. It is desirable to install it at a position away from 200 mm to 500 mm.

  Since the configuration other than the above is substantially the same as the configuration of the first or second embodiment described above, the same or corresponding elements are denoted by the same reference numerals, and description thereof will not be repeated.

  According to the present embodiment, the partition plate 20 (FIG. 7) allows the contaminants present in the surface layer of the cleaning tank 1 to diffuse into the region of the inclined rising portion of the conveyor 3 (the right portion in FIG. 2). (Hereinafter, the left side of the partition plate 20 in FIG. 7 is referred to as a cleaning region, and the right side of the partition plate 20 is referred to as an object recovery region). Thereby, it is possible to prevent contaminants from reattaching to the object 8 to be cleaned when the object 8 to be cleaned passes through the inclined rising portion of the conveyor 3.

  Since this cleaning technique uses an adsorption phenomenon on the surface of the fine bubble BB and removes deposits, particularly oil, adhering to the surface of the article 8 to be cleaned, the surface layer in the cleaning tank 1 7 layers of cleaning liquid containing a large amount of contaminants are formed. The surface layer containing a large amount of contaminants is removed from the washing tank 1 by overflowing to the overflow tank 13, but the amount of deposits removed from the object 8 to be washed continuously is large or overflow. When the amount of the cleaning liquid 7 to be used is small, the contaminant cannot be completely removed from the surface layer. In addition, the removal of deposits on the object to be cleaned 8, that is, the supply of contaminants to the surface layer of the cleaning liquid 7 in the cleaning tank 1 and the overflow of contaminants in the surface layer of the cleaning tank 1 proceed simultaneously in parallel. No matter how large the overflow amount is, it is difficult to completely remove the contaminants from the surface layer of the cleaning tank 1. When the partition plate 20 is not provided, when the article 8 to be cleaned passes through the inclined rising portion of the conveyor 3, it must pass through the surface layer of the cleaning liquid 7 containing a large amount of contaminants. There arises a problem that contaminants reattach to the surface of the object 8.

(Embodiment 4)
FIG. 8 is a plan view (A) and a front view (B) schematically showing configurations of a cleaning tank and an overflow tank of the cleaning device in Embodiment 4 of the present invention. Referring mainly to FIG. 8, in the cleaning device of the present embodiment, the conveyor 3 (not shown in FIG. 8) on the conveyance direction side (the right side in the drawing) rather than the partition plate 20 at the edge of the cleaning tank 1. ) Is formed with a notch 21. That is, the cut portion 21 is formed at the edge of the cleaning tank 1 in the cleaning object recovery area described in the third embodiment.

  Since it is important that the cleaning liquid 7 overflows from more edges of the cleaning tank 1, the notch 21 needs to have a wide notch at an appropriate water depth. Therefore, preferably, a plurality of cut portions 21 are formed. Further, although it depends on the vertical dimension of the partition plate 20, the shape of the cleaning tank 1, and the amount of overflowing cleaning liquid, it is generally a U-shaped cut at a position of 5 mm to 30 mm from the water surface in the object recovery area. It is preferable to add. A plurality of inverted triangular partition plates 20 may be formed.

  Since the configuration other than the above is substantially the same as the configuration of the third embodiment described above, the same or corresponding elements are denoted by the same reference numerals, and description thereof will not be repeated.

  According to the present embodiment, a sufficient amount of cleaning liquid overflows from the cleaning object recovery area by the notch 21. As a result, the surface layer of the cleaning liquid 7 in the cleaning object recovery area can be kept clean.

  If the notch 21 is not provided, the cleaning liquid 7 supplied from the injector 5 to the cleaning tank 1 in the cleaning area is clogged by the partition plate 20, so that it is higher than the liquid level of the cleaning liquid 7 in the cleaning area. In addition, the liquid level of the cleaning liquid 7 in the object recovery area becomes low. As a result, a phenomenon occurs in which the overflow amount from the cleaning target collection region is very small or zero compared to the overflow amount from the cleaning region. As a result, it becomes difficult to remove contaminants from the object collection area. For this reason, when the contaminants separated from the object to be cleaned 8 dive under the partition plate 20 and enter the object to be cleaned recovery region, there arises a problem that the contaminants stay in the object recovery region to be cleaned.

(Embodiment 5)
FIG. 9 is a diagram schematically showing the configuration of the cleaning apparatus in the fifth embodiment of the present invention. In FIG. 9, the transport system is not shown. Referring to FIG. 9, the cleaning apparatus of the present embodiment includes drain holes 22a and 22b, a return manifold 23, a valve 24a (first supply amount adjusting unit), and a valve 24b (second supply amount adjusting unit). ). The drain holes 22 a and 22 b are provided at the bottoms of the cleaning tank 1 and the recovery tank 15, respectively. The drain hole 22a is connected to the return manifold 23 via a valve 24a. The drain hole 22b is connected to the return manifold 23 via a valve 24b. The return manifold 23 is connected to the water supply side of the circulation pump 16. The valve 24 a is for adjusting the supply amount of the cleaning liquid 7 from the cleaning tank 1 to the plurality of injectors 5. The valve 24 b is for adjusting the supply amount of the cleaning liquid 7 from the recovery tank 15 to the plurality of injectors 5.

  Since the configuration other than the above is substantially the same as the configuration of any of Embodiments 1 to 4 described above, the same or corresponding elements are denoted by the same reference numerals, and description thereof will not be repeated.

  According to the present embodiment, the amount of the cleaning liquid overflowing from the cleaning tank 1 can be adjusted by adjusting the valve 24a and the valve 24b. Further, by increasing the opening degree of the valve 24a and reducing the opening degree of the valve 24b, the drainage hole 22a from the cleaning tank 1 is maintained while maintaining the amount of the cleaning liquid 7 supplied from the injector 5 to the cleaning tank 1. It is possible to increase the amount of the cleaning liquid 7 withdrawn through the. Thereby, the overflow amount from the washing tank 1 to the overflow tank 13 can be suppressed.

  This suppression effect is particularly useful when more injectors 5 are provided. This is because the supply amount of the cleaning liquid 7 from each injector 5 to the cleaning tank 1 is normally constant regardless of the number of the injectors 5, so that the cleaning liquid from the injector 5 to the cleaning tank 1 increases as the number of the injectors 5 increases. This is because the total supply amount of 7 becomes large, and as a result, the overflow amount of the cleaning liquid 7 tends to be excessive. For example, the flow rate of water supplied to each injector 5 used in general degreasing and cleaning is 4 liters / minute to 10 liters / minute. When the number of injectors 5 increases due to the configuration of the apparatus, the circulation flow rate of the cleaning liquid 7 Becomes larger.

  If the drain hole 22a and the valve 24a are not provided, the amount of cleaning liquid supplied from the recovery tank 15 to the injector 5 becomes the amount of cleaning liquid overflowing from the cleaning tank 1 as it is. For this reason, when the number of injectors 5 is large, the overflow amount becomes large, so there is a problem that the overflow tank 13 has to be enlarged.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be applied particularly advantageously to a cleaning apparatus for cleaning an object to be cleaned with a cleaning liquid.

It is a figure which shows typically the structure of the washing | cleaning apparatus in Embodiment 1 of this invention. It is sectional drawing which shows roughly the structure of the washing tank of FIG. 1, and its periphery. It is a schematic sectional drawing in alignment with the III-III line of FIG. It is a top view which shows roughly the structure of the support body which the washing | cleaning apparatus in Embodiment 1 of this invention has. It is the top view (A) and front view (B) which show schematically the structure of the washing tank and overflow tank which the washing | cleaning apparatus in Embodiment 1 of this invention has. It is a figure which shows typically the plane layout of the conveyor and injector of the washing | cleaning apparatus in Embodiment 2 of this invention. It is the top view (A) and front view (B) which show schematically the structure of the washing tank and overflow tank of the washing | cleaning apparatus in Embodiment 3 of this invention. It is the top view (A) and front view (B) which show schematically the structure of the washing tank and overflow tank of the washing | cleaning apparatus in Embodiment 4 of this invention. It is a figure which shows typically the structure of the washing | cleaning apparatus in Embodiment 5 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Washing tank, 2 Conveyor support tool, 3 Conveyor, 4 Chute, 5, 5B, 5L, 5R, 5T Injector, 6 Support body, 7 Cleaning liquid, 8 Object to be cleaned, 9 Screw, 10 Block body, 11 Cross-linked body, 12 Mesh, 13 Overflow tank, 14 Drain hole, 15 Recovery tank, 16 Circulation pump, 17 Water branch manifold, 18 Air introduction part, 19 Air branch manifold, 20 Partition plate, 21 Cut part, 22a, 22b Drain hole, 23 Return manifold, 24a, 24b valve.

Claims (8)

A cleaning device for cleaning an object to be cleaned with a cleaning liquid,
A cleaning tank for holding the cleaning liquid;
A conveyor for conveying the object to be cleaned in the cleaning liquid;
A cleaning apparatus comprising: a plurality of injectors arranged around the conveyor so that a flow including air bubbles can be generated in the cleaning liquid, and the flow is directed toward the conveyor. The plurality of injectors includes a pair of injectors;
The cleaning device according to claim 1, wherein the pair of injectors are arranged to generate a flow of the cleaning liquid such that the object to be cleaned receives a pair of forces that oppose each other. The plurality of injectors includes a set of injectors;
The cleaning device according to claim 1 or 2, wherein the one set of injectors are arranged in a staggered manner along a conveying direction of the conveyor. Each of the plurality of injectors has a spout for ejecting the flow;
The spout is arranged such that the distance to the object to be cleaned is 20 mm or more and 100 mm or less,
The cleaning device according to any one of claims 1 to 3, wherein the plurality of injectors are arranged at intervals of 30 mm or more and 100 mm or less along a conveying direction of the conveyor.   The cleaning apparatus according to claim 1, further comprising a recovery tank that recovers the cleaning liquid that has overflowed from the cleaning tank. The plurality of injectors are configured to generate the flow by being supplied with the cleaning liquid from each of the cleaning tank and the recovery tank and ejecting the supplied cleaning liquid into the cleaning layer,
A first supply amount adjusting unit for adjusting the supply amount of the cleaning liquid from the cleaning tank to the plurality of injectors, and a second for adjusting the supply amount of the cleaning liquid from the recovery tank to the plurality of injectors The cleaning apparatus according to claim 5, further comprising a supply amount adjusting unit.   The cleaning apparatus according to any one of claims 1 to 6, further comprising a partition plate that divides a liquid level of the cleaning liquid along a direction intersecting a conveying direction of the conveyor.   The cleaning device according to claim 7, wherein a cut portion is formed closer to a conveying direction of the conveyor than the partition plate at an edge of the cleaning layer.

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