Coating material cleaning device for coating jig

Abstract

To provide a coating material cleaning device for coating jig which can reliably clean the entire coating jig such as masking rubber in a short time, can be miniaturized in size, has no environmental issues, and has a low running cost, and a coating material cleaning method using the same.SOLUTION: A coating material cleaning device for coating jig which cleans a coating material adhering to a masking jig 102 that masks a masking portion of a coating object material, includes: a cleaning container holding part which holds a cleaning container 70 in which the masking jig 102 is housed; and a spray nozzle part which is disposed above the cleaning container holding part, and sprays water at high pressure onto the masking jig 102. The cleaning container 70 includes: a cylindrical part 72; a bowl part 74 which is disposed on one side in the axial direction of the cylindrical part 72; and multiple trunk part through holes 73 which penetrate a trunk part 72a in the radial direction of the cylindrical part 72.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a paint cleaning device for a painting jig, and particularly relates to a paint cleaning device for a painting jig that is suitable for cleaning and removing paint adhering to masking parts of automobile parts such as engine covers, steering shafts, brake parts, wiper blades, and suspension parts, ventilation fans, ventilation fan covers, doors, knob handles, housing equipment, motors, reducers, ends of hydraulic piping, machine covers, and masking parts of construction equipment such as frame connections, in particular, for example, masking rubber. [Background technology]

[0002] In the manufacturing process of various industrial products, particularly automobile parts, masking jigs are used in the painting process in which urethane- or silicone-based paint is applied to the parts. These jigs are installed to cover areas of the product to be painted other than the areas to be painted, preventing the paint from adhering to them, so that the paint adheres only to the desired specific areas of the product to be painted. This masking jig is made of a synthetic resin material such as silicone rubber and is molded into a shape corresponding to the shape of the part to be painted on the workpiece. A masking jig corresponding to the workpiece is selected and used in the painting process, and the paint attached during the painting process is washed off, so that the masking jig can be used repeatedly. In this case, specifically, the paint applied to the desired part to be painted on the workpiece during the painting process is also splashed around the painted part, so that the paint adheres to the surface of the masking jig, especially to the edge part close to the painted part, and therefore a cleaning process is required after the painting process to wash off the paint from the masking jig. Therefore, the method for cleaning the mask jig that is the background of the present invention includes a method using dichloromethane, an organic chlorine-based solvent, as a cleaning agent, a method of immersing the jig in a thinner-based solvent to dissolve the paint, and a method of dissolving the paint using a high-boiling point solvent. On the other hand, a conventional mask jig cleaning device that forms the background of the present invention is characterized by comprising a cleaning container that supplies mask jigs, which are objects to be cleaned that have paint attached to the inside of the device, a nozzle body that sprays cleaning liquid toward the mask jig provided in the cleaning container, and a control mechanism that can adjust the distance between the nozzle body and the mask jig (see, for example, Patent Document 1). Another conventional cleaning device for cleaning paint adhering to a paint mask jig, which is the background of the present invention, includes a cleaning tank into which a cleaning liquid is poured, a rinsing tank into which a rinsing agent is poured, a tank equipped with steam or air injection means for steam cleaning and air drying, and a transport device which transports the paint mask jig horizontally between the cleaning tank, the rinsing tank, and the tanks for steam cleaning and air drying and is capable of lifting and lowering so as to insert the jig into each tank, in which the cleaning liquid is composed of 85 to 95% by weight of a first component which is at least one of diethylene glycol mono-n-hexyl ether, diethylene glycol diethyl ether, 3-methoxy-3-methylbutyl acetate, and hexylene glycol, and 5 to 15% by weight of a second component which is a liquid hydrocarbon and is an α-olefin having 8 to 18 carbon atoms, and the rinsing agent is composed of at least one of water-soluble glycols, water-soluble glycol ether compounds, and water-soluble alcohols (see, for example, Patent Document 2). In this cleaning device, it is preferable that the cleaning tank is equipped with a means for heating the cleaning liquid in the cleaning tank and an aeration means for generating air bubbles from the cleaning liquid, and the transport device is equipped with a vertical movement means for moving the paint mask jig up and down while immersed in the cleaning liquid in the cleaning tank to wash off the paint, and for moving the paint mask jig up and down while immersed in the rinsing agent in the rinsing tank to replace the cleaning liquid with the rinsing agent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-99799 [Patent Document 2] Patent No. 4488681 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional cleaning method using dichloromethane as the cleaning agent, it has been pointed out that dichloromethane is a carcinogenic substance, and it poses health problems for workers and environmental problems such as groundwater pollution, etc. Moreover, the paint washed off from the mask jig dissolves in the cleaning agent and quickly loses its cleaning power, so the cleaning solution must be replaced periodically, which is time-consuming and increases the running cost of the cleaning solution. In addition, in the method of immersing the mask jig in the above-mentioned thinner-based solvent to dissolve the adhering paint, it is necessary to rock the mask jig in the immersion tank to promote dissolution of the paint, and the cleaning process is time-consuming. Furthermore, the above-mentioned method of dissolving the paint in a high-boiling point solvent for cleaning has technical problems such as high cost of the cleaning liquid itself, high cost of equipment for handling the cleaning liquid, and environmental problems due to the use of high-boiling point solvents. Furthermore, in the cleaning device disclosed in, for example, Patent Document 1 mentioned above, there is room for improvement in the method of spraying the cleaning liquid from the nozzle with respect to spraying the cleaning liquid onto the entire mask jig, particularly with respect to reliably washing off paint adhering to, for example, the bent edge portion of the mask jig. Furthermore, the cleaning equipment and cleaning method using the same disclosed in, for example, Patent Document 2 mentioned above include a cleaning tank into which a cleaning liquid is poured, a rinsing tank into which a rinsing agent is poured, a tank equipped with steam or air ejection means for steam cleaning and air drying, and a transport device which transports a paint mask jig horizontally between the cleaning tank, the rinsing tank, and the tanks for steam cleaning and air drying and is liftable so that it can be inserted into each tank, and has a vertical movement means for moving the paint mask jig up and down while immersed in the cleaning liquid in the cleaning tank to wash off the paint, and for moving the paint mask jig up and down while immersed in the rinsing agent in the rinsing tank to replace the cleaning liquid with the rinsing agent, so that the cleaning equipment required for the cleaning work is large. In addition, the cleaning method using this cleaning device includes a first step of cleaning the paint adhering to the paint mask jig with a cleaning liquid, a second step of replacing the cleaning liquid adhering to the paint mask jig with a rinse agent composed of at least one of water-soluble glycol, water-soluble glycol ether compound, and water-soluble alcohol, a third step of cleaning the rinse agent adhering to the paint mask jig with steam, and a fourth step of drying the paint mask jig with compressed air. As a result, the method has a large number of steps and is time-consuming, resulting in poor work efficiency.

[0005] Therefore, the main object of the present invention is to provide a painting jig cleaning device and a cleaning method using the same, which can reliably clean the entire painting jig such as a masking rubber in a short time, which allows the device itself to be made smaller, which has no environmental problems and low running costs. [Means for solving the problem]

[0006] The present invention of claim 1 is a paint cleaning device for a painting jig that cleans paint adhering to a masking jig that masks a masking portion of an object to be painted, comprising a cleaning container holding section that holds a cleaning container in which the masking jig is stored, and a spray nozzle section that is arranged above the cleaning container holding section and sprays water at high pressure onto the masking jig, wherein the cleaning container includes a cylindrical section, a bowl section that is arranged on one axial side of the cylindrical section, and a plurality of body through holes that penetrate the body of the cylindrical section in the radial direction of the cylindrical section. The present invention of claim 2 is an invention dependent on the invention of claim 1, and is a paint cleaning device characterized in that the bowl portion further includes a plurality of bowl portion through holes arranged on both or either one of the peripheral surface and bottom portion of the bowl portion and penetrating both or either one of the peripheral surface and bottom portion. The present invention according to claim 3 is an invention dependent on the invention according to claim 2, and is a paint cleaning device characterized in that when the sum of the opening areas of the multiple body through holes in the cylindrical portion is X and the sum of the opening areas of the multiple bowl through holes in the bowl portion is Y, X>Y is set. The present invention according to claim 4 is a paint cleaning method for a painting jig using the paint cleaning device according to claim 1 or 3, characterized in that it includes a cleaning step of spraying water sprayed from the spray nozzle part onto the masking jig while storing the water in a cleaning container, thereby cleaning the masking jig. The present invention according to claim 5 is an invention dependent on the invention according to claim 4, and is a paint washing method characterized in that the washing step includes a step of storing the masking jig in a washing container with the boundary between the cylindrical portion and the bowl portion and its vicinity as an upper limit, and a step of spraying water sprayed from the spray nozzle portion onto the masking jig while storing the water in the washing container with the boundary between the cylindrical portion and the bowl portion and its vicinity as an upper limit, to wash the masking jig. Effect of the Invention

[0007] According to the painting jig cleaning device and cleaning method using the same of the present invention, the entire painting jig, such as a masking rubber, can be cleaned reliably in a short time, the device itself can be made smaller, and there are the effects of providing a painting jig cleaning device and cleaning method using the same that are environmentally friendly and have low running costs.

[0008] The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, which refers to the drawings. [Brief description of the drawings]

[0009] [Figure 1] 1 is a front view illustrating an example of an embodiment of a paint washing device for a painting jig according to the present invention; [Diagram 2] FIG. 2 is a left side view of FIG. 1; [Diagram 3] FIG. 2 is a plan view of FIG. 1; [Figure 4] 4 is a front view illustrating an example of a cleaning container holder for holding a cleaning container applied to the paint cleaning device of the coating jig illustrated in FIGS. 1, 2 and 3. FIG. [Diagram 5] FIG. 5 is a bottom view of FIG. 4 . [Figure 6] FIG. 5 is a left side view of FIG. 4. [Figure 7] 4 is a front view of a cleaning container applied to the paint cleaning device of the coating jig shown in FIGS. 1, 2 and 3. FIG. [Figure 8] FIG. 8 is a plan diagrammatic view of FIG. 7. [Figure 9] FIG. 4 is a perspective view illustrating an example of a masking jig (workpiece) to be cleaned by the paint cleaning device of the coating jig illustrated in FIGS. 1, 2, and 3, and an example of its use. [Figure 10] FIG. 4 is an explanatory diagram showing the action and effect when a masking jig (workpiece) is washed by the paint washing device of the painting jig shown in FIGS. 1, 2 and 3. [Figure 11]4 is an explanatory diagram showing a state after the masking jig (work) has been washed by the paint washing device of the painting jig shown in FIGS. 1, 2 and 3. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] FIG. 1 is a front view showing an example of an embodiment of a paint washing device for a painting jig according to the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a plan view of FIG. This paint washing device 10, in outline, mainly includes components such as a housing (casing) 12 with casters 14 on its lower end side, a washing booth 18 disposed in the upper part of the housing 12, a washing container 70 in which a masking jig (e.g., a masking plug) 102 as a work to be washed is stored and disposed in the washing booth 18, an injection nozzle unit 34 disposed above the washing booth 18 and injecting high-pressure water onto the masking jig 102 in the washing container 70, a water collecting unit 80 disposed in the lower part of the housing 12 and collecting and flowing downward washing water containing paint residue (coating film peeled and removed from the masking jig) removed from the masking jig (e.g., a masking plug) 102 after washing the masking jig, and a filtration unit 82 filtering the paint residue from the washing water containing paint residue flowing down from the water collecting unit 80. In this paint washing device 10, for example, tap water is used as the washing water.

[0011] The above-mentioned and other constituent elements of the paint washing device 10 will be described in detail below. First, an example of a masking jig as a workpiece to be cleaned by the paint cleaning apparatus 10 will be described with reference to Fig. 9. As shown in Fig. 9, the masking jig as a workpiece to be cleaned can be, for example, a masking plug 102 and a masking seal 104 used when painting an automobile brake part 100. The paint cleaning apparatus 10 according to this embodiment cleans and removes a coating layer 106 of paint that has adhered to the masking plug 102 after the painting process and dried.

[0012] The paint washing device 10 includes a housing 12 supported by, for example, two support bases 11a and 11b, as shown in Fig. 1 and Fig. 2. The two support bases 11a and 11b are each appropriately made of a combination of various steel materials such as channel steel and square pipes, or C-shaped steel, equal-sided angles, unequal-sided angles, etc. The housing 12 is provided with two moving casters 14a, 14b and 15a, 15b on the support bases 11a and 11b, respectively, as a moving means for making the housing 12 movable. A cleaning booth 18 is disposed at an upper portion inside the housing 12. The cleaning booth 18 includes a cleaning container holding section 50 that holds a cup-shaped cleaning container 70 (see Figs. 7 and 8). This cleaning container holding section 50 includes a mounting table 52 for the cleaning container 70. As shown in Fig. 5, the mounting table 52 is formed, for example, in a hexagonal shape in a plan view. The mounting table 52 has a plurality of through-holes 54 that penetrate from one main surface to the other main surface. The multiple through-holes 54 are formed, for example, as elongated holes, and are arranged at intervals in the width direction of the mounting table 52, for example, in ten rows.

[0013] 1, 2, 4, 5 and 6, a guide portion 56 is connected to one end side of the mounting table 52 in the longitudinal direction (for example, the front side of the paint cleaning device 10 as viewed in Figs. 4 and 6). The guide portion 56 is formed of a curved plate that is arch-shaped when viewed from the side as shown in Fig. 6. The guide portion 56 has a guide function for smoothly introducing and placing the cleaning container 70 on the mounting table 52. The mounting table 52 and the guide portion 56 may be integrally formed from a rust-resistant metal material such as stainless steel or aluminum, or a synthetic resin material.

[0014] 2, the cleaning container holding portion 50 includes a holding plate 58 having substantially the same shape as the mounting table 52 in a plan view. The holding plates 58 are held on the top plate 12A of the housing 12 by, for example, two holding columns 60a, 60b. The front end of the holding plate 58 is connected to the top plate 12A by the two holding columns 60a, and the rear end of the holding plate 58 is connected to the top plate 12A by two holding columns 60b.

[0015] 1, 2, 4, and 6, the holding plate 58 is connected to the mounting table 52 by, for example, two pillars 62a, 62b, two pillars 64a, 64b, and two pillars 66a, 66b. In this case, the pillars 62a, 62b connect the front end side of the mounting table 52 to the holding plate 58, the pillars 66a, 66b connect the rear end side of the mounting table 52 to the holding plate 58, and the pillars 64a, 64b connect the middle part of the mounting table 52 to the holding plate 58. Each of the two pillars 62a, 62b, the pillars 64a, 64b, and the pillars 66a, 66b not only functions to connect the mounting table 52 to the holding plate 58, but also functions as a spacer between the mounting table 52 and the holding plate 58, making the height distance between the mounting table 52 and the holding plate 58 slightly higher than, for example, the height of the cleaning container 70. The support columns 64a, 64b and 66a, 66b further have a positioning function for positioning the cleaning container 70 placed on the placement table 52 in cooperation with positioning members 68a, 68b, which will be described later.

[0016] 1, 2, 4, 5 and 6, the mounting table 52 is provided with positioning members 68a, 68b for positioning the cleaning container 70 mounted on the mounting table 52 so that the cleaning container 70 can be accurately mounted at a predetermined position by cooperation with the above-mentioned supports 64a, 64b and supports 66a, 66b. The positioning members 68a, 68b are arranged at positions spaced slightly toward the guide portion 56 from the circumference of the mounting position of the cleaning container 70 mounted on the mounting table 52, as shown in Fig. 5, for example. The positioning members 68a, 68b are formed of, for example, ball plungers, as shown in particular in Fig. 4, 5 and 6. In this case, when the cleaning container 70 is placed on the mounting table 52, as the cleaning container 70 passes through these positioning members 68a, 68b, the spherical portion moves downward due to the spring action of the ball plunger, and after the cleaning container 70 has passed and been placed in the specified position, the spherical portion moves upward, thereby restricting the cleaning container 70 from moving forward beyond the positioning members 68a, 68b.

[0017] That is, the positioning members 68a, 68b cooperate with the above-mentioned supports 64a, 64b and supports 66a, 66b to serve both as a positioning function for mounting the cleaning container 70 at a predetermined position on the mounting table 52 and as a stopper function for preventing the cleaning container 70 from shifting out from the mounting position toward the guide section 56. In this case, the supports 62a, 62b, the supports 64a, 64b, the supports 66a, 66b and the positioning members 68a, 68b are arranged on the circumference of the predetermined mounting position of the cleaning container 70 mounted on the mounting table 52. As shown in FIG. 5, the mounting table 52 is provided with spare mounting holes 69a, 69b for adjusting the mounting interval of the supports 62a, 62b when the supports 62a, 62b are mounted.

[0018] In addition, as shown in Figs. 1, 2 and 3, the paint washing device 10 is provided with a front door 20, for example, of a horizontally elongated rectangular shape when viewed from the front, which is disposed on the front side of the housing 12 facing the washing booth 18 and which can be opened and closed. The front door 20 closes the front opening 12A of the washing booth 18 as appropriate to prevent washing water from scattering during washing. The front door 20 can be opened and closed in the vertical direction by, for example, an air cylinder 22 as an actuator for driving the front door opening and closing device. In this case, the air cylinder 22 is driven by the operation of two front door opening and closing switches 98a, 98b arranged at an interval on the left and right sides at the middle part in the height direction on the front side of the housing 12. The two front door opening and closing switches 98a, 98b are switches to be pressed with both hands to prevent hands from being pinched when the front door 20 is opened.

[0019] As shown in Figs. 1, 2 and 3, the paint washing device 10 is provided with, for example, one injection nozzle unit 34 for injecting washing water at high pressure into the washing booth 18. Furthermore, for example, two air blow nozzle units 36a, 36b for injecting air at high pressure into the washing container 70 after washing are arranged side by side at intervals on the left and right of the injection nozzle unit 34 when the washing booth 18 is viewed from the front side. The one injection nozzle unit 34 and the two air blow nozzle units 36a, 36b are each arranged with their injection holes (not shown) facing the washing container 70 from the holding plate 58, and are attached to the top plate 12A of the housing 12 by the nozzle unit holder 38. The two air blow nozzle units 36a, 36b are intended to blow off and dry the washing water and peeled pieces of the coating film 106 adhering to the masking plug 102 after washing. The two air blow nozzle portions 36a, 36b are connected to, for example, a compressor (not shown) by piping (not shown) including a hose, and compressed air is supplied to them by the compressor (not shown).

[0020] Two proximity sensors (not shown) are attached to the air cylinder for moving the front door 20 up and down. The proximity sensor attached to the upper end of the air cylinder detects when the piston (made of metal) inside the cylinder moves to the upper end and raises the front door 20. The front door 20 is controlled by a program under sequence control so that it starts to descend 0.5 seconds after drying by the two air blow nozzle parts 36a, 36b is completed. When the front door 20 starts to open and the piston inside the cylinder moves to the bottom end, the proximity sensor attached to the underside of the cylinder body detects this and the descent of the piston ends.

[0021] As shown in Fig. 2, the paint washing device 10 includes a high-pressure pump unit 26 that supplies high-pressure washing water to the spray nozzle portion 34. The high-pressure pump unit 26 includes a high-pressure pump 28 and a drive motor 30 that drives the high-pressure pump 28. The drive motor 30 is vibration-proofed by a vibration-proof rubber 32. In this case, as seen in Fig. 2, the vibration-proof rubber 32 is installed on the left side between the two support bases 11a, 11b, and the high-pressure pump 28 is disposed on the vibration-proof rubber 32. In addition, a cover member 33 is disposed so as to cover the vibration-proof rubber 32 and the high-pressure pump 28, and the drive motor 30 is disposed on the cover member 33.

[0022] Further, in this paint washing device 10, as shown in Fig. 2, the high-pressure pump 28 includes an intake port 28A and an exhaust port 28B. An intake pipe 40 for feeding water (initially, for example, tap water) from inside the tank section 24 is piped to the intake port 28A, and a water supply pipe 42 for supplying water (cleaning water and cleaning treatment liquid) to the tank section 24 described later is piped to the exhaust port 28B. The high-pressure pump 28 and the spray nozzle section 34 are connected via a water supply pipe 42 for supplying high-pressure water and a high-pressure hose 46 for supplying high-pressure water to the spray nozzle section 34. That is, in this paint washing device 10, water is circulated from the tank section 24 through the intake pipe 40, the intake port 28A of the high-pressure pump 28, the exhaust port 28B of the high-pressure pump 28, the water supply pipe 42, and the high-pressure hose 46 to the cleaning container 70, the water collection section 80, the filtration section 82, and the tank section 24 in the cleaning booth 18 in the paint washing device 10. Further, in this paint washing device 10, a drain pipe 44 for discharging water (washing water and washing treatment liquid) from inside the tank portion 24 is disposed on the bottom side of the housing 12.

[0023] On the other hand, as shown in Figures 1 and 2, the paint washing device 10 is disposed below the washing booth 18 in the housing 12 and includes a water collecting section 80 for collecting and allowing downward flow of washing water (hereinafter, the washing water containing the paint residue after washing is referred to as "washing treatment liquid") remaining after washing the paint adhering to the masking plug 102 in the washing container 70 in the washing booth 18. The water collecting section 80 is disposed below the washing booth 18 and has, for example, a square pyramidal funnel shape with an open top. A flow-down port 80A for allowing the washing treatment liquid to fall downward is disposed in the center of the bottom surface of the water collecting section 80.

[0024] Further, a rectangular parallelepiped filter section 82 is disposed below the water collecting section 80. At least the peripheral surface and bottom surface of the filter section 82 are formed of a mesh section 82A, and the cleaning treatment liquid dropping from the flow-down port 80A of the water collecting section 80 is filtered by the mesh section 82A of the filter section 82. As shown in FIG. 2, the filter section 82 can be appropriately removed by opening a filter section removal port cover 83 provided on the front side of the housing 12 in an openable and closable manner. At the bottom of the housing 12, a tank section 24 is disposed below the filter section 82. At the center of the bottom surface of the tank section 24, a drain port 86 is provided for draining the cleaning treatment liquid stored in the tank section 24. At the bottom of the front side of the housing 12, a level gauge 84 is disposed for visually checking the amount of water (cleaning water and cleaning treatment liquid) in the tank section 24.

[0025] The level gauge 84 is a guide for the upper water level to prevent overflow when cleaning water is initially poured into the tank section 24. If too much cleaning water is poured in, a drain valve (not shown) at the bottom of the tank section 24 is manually opened to drain the water. If there is a shortage of cleaning water in the tank section 24, particularly in the case of a drought, the high-pressure pump 28 will run idle and become seized, so the paint cleaning device 10 is provided with a safety switch to stop the operation of the paint cleaning device 10 and protect the high-pressure pump 28. In this case, when the water (cleaning water and cleaning treatment liquid) in the tank section 24 falls below the lower limit, a level switch such as a float switch (not shown) provided in the tank section 24 is activated to stop the operation of the paint cleaning device 10.

[0026] Next, this paint washing apparatus 10 is particularly characterized by the washing container 70 which is held in the washing booth 18 described above and in which the workpiece, for example the masking plug 102, is stored. The structure of this washing container 70 will now be described in detail. As shown in Fig. 7 and Fig. 8, the cleaning container 70 includes, for example, a cylindrical tubular portion 72 as a bottom portion. Inside the tubular portion 72, a bowl portion 74, for example, hemispherical, is formed in the axial middle portion of the tubular portion 72. The diameter of the tubular portion 72 and the diameter of the open portion of the bowl portion 74 are formed to be substantially the same. This bowl portion 74 is disposed near the lower end portion (one end portion) in the axial direction of the tubular portion 72. The bowl portion 74 is not limited to a hemispherical bowl shape, and can be formed into various truncated pyramidal bowl shapes including, for example, a truncated conical bowl shape, a large triangular pyramid bowl shape, a truncated square pyramid bowl shape, a truncated pentagonal pyramid bowl shape, and the like. As shown in Figures 7, 8, 6, 10 and 11, the cylindrical portion 72 has, for example, a plurality of trunk slits 73 in the trunk 72a of the cylindrical portion 72 as trunk through holes that penetrate the cylindrical portion 72 in the radial direction. The trunk slits 73 are arranged at intervals in the circumferential direction of the cylindrical portion 72 and penetrate from the inner surface of the trunk 72a to the outer surface. The trunk slits 73 have an elliptical shape that extends a desired length in the axial direction of the cylindrical portion 72. In this embodiment, for example, 23 trunk slits 73 are arranged at desired intervals in the circumferential direction of the cylindrical portion 72.

[0027] On the other hand, as shown in Figures 7, 8, 10 and 11, the bowl portion 74 has, for example, a plurality of peripheral wall slits 75 in the peripheral wall of the hemispherical wall portion 74a of the bowl portion as bowl portion through holes penetrating the bowl portion 74. The plurality of peripheral wall slits 75 are arranged at intervals in the circumferential direction of the hemispherical wall portion 74a and penetrating from the inner surface of the hemispherical wall portion 74a to the outside. The plurality of peripheral wall slits 75 have, for example, an arch shape along the hemispherical surface of the bowl portion 74. In this embodiment, three peripheral wall slits 75 are arranged at positions that divide the circumferential direction of the hemispherical wall portion 74a into thirds, that is, at intervals of, for example, 120 degrees in the circumferential direction. Furthermore, the bowl portion 74 has, for example, three bottom through holes 76, which are circular in plan view and penetrate the bottom, near the center of the bottom and spaced apart in the circumferential direction. In this embodiment, the three bottom through holes 76 are arranged at positions that divide the circumferential direction of the bottom of the hemispherical wall portion 74a into three equal parts, that is, at intervals of 120 degrees in the circumferential direction. The three bottom through holes 76 are arranged at intervals from one end side of the three peripheral wall slits 75, in this case, the center side of the bottom of the bowl portion 74, as seen in FIG. 8, for example. In addition, the cleaning container 70 has, for example, a U-shaped gripping portion 78 arranged on a part of the outer circumferential surface of the cylindrical portion 72, as shown in FIG. 7 and FIG. 8. One end of the gripping portion 78 is fixed to the upper side of the cylindrical portion 72 in the axial direction, and the other end is fixed to the lower side of the cylindrical portion 72 in the axial direction.

[0028] In this cleaning container 70, the size, number, arrangement, arrangement position, etc. of the multiple body slits 73 are appropriately set so that, in particular, when the sum of the opening areas of the multiple body slits 73 is X and the sum of the opening areas of the peripheral wall slits 75 and the bottom through hole 76 is Y, X>Y. In the example of the embodiment shown in Figs. 7 and 8, the length (height) of the body slits 73 when viewed in the axial direction of the cylindrical part 72, the length (width) when viewed in the circumferential direction of the cylindrical part 72, the number of body slits 73, the intervals and arrangement of the multiple body slits 73 when viewed in the circumferential direction, etc. can be appropriately set to be changeable. In this paint cleaning device 10, the opening areas of the multiple body slits 73, the peripheral wall slits 75, and the bottom through hole 76 are set so that the masking plug 102 stored in the cleaning container 70 can be cleaned while maintaining a state in which cleaning water is accumulated in the bowl part 74 in the cleaning container 70. Furthermore, in this paint washing device 10, the washing container 70 does not necessarily have to have the peripheral wall slit 75 and the bottom through-hole 76, and may have only the body slit 73.

[0029] Next, the action and effect of this paint washing device 10 when washing the masking plug 102 housed in the washing container 70 will be described in detail below. In this paint washing device 10, as shown in Figures 1, 2, 4, 5 and 6, a washing container 70 containing a large number of masking plugs 10 is washed and removed while held in a washing holder 50 in a washing booth 18. In this case, high-pressure washing water is sprayed from the spray nozzle unit 34 toward the masking plugs 102 in the washing container 70 placed on a mounting table 52, as shown in Figure 10. As a result, high-pressure cleaning water flows into the cleaning container 70, and the level of the cleaning water rises sequentially in the bowl portion 74 and then the cylindrical portion 72. However, as described above, the masking plug 102 can be washed while maintaining the cleaning water stored in the bowl portion 74, i.e., in the stored cleaning water stored in the bowl portion 74.

[0030] In this case, the high-pressure cleaning water sprayed from the spray nozzle 34 blows away the masking plugs 102, and in the stored cleaning water in the bowl portion 74, the masking plugs 102 collide with each other, and the blown-away masking plugs 10 collide with the inner wall surface of the body portion 72a of the tubular portion 72 and the hemispherical wall portion 74a of the bowl portion 74. At this time, the masking plugs 102 are elastically deformed, and a crack 108 occurs in the coating layer 106. Furthermore, the high-pressure cleaning water is sprayed against the crack 108 and penetrates into the crack 108, so that the coating layer 106 is peeled off and removed one after another.

[0031] That is, in the stored cleaning water in the bowl portion 74, the masking plugs 102 are suspended and stirred while being sprayed with high-pressure cleaning water to hit the masking plugs 102, so that the masking plugs 102 are randomly and rapidly changed in position, for example rotated and swung, thereby imparting various irregular and complex movements to the masking plugs 102 as if they were undergoing Brownian motion (irregular movement of fine particles suspended in gas or liquid) in the stored cleaning water. As a result, the high-pressure cleaning water hits the entirety of the numerous masking plugs 102 evenly, and the coating layer 106 of the entirety of the masking plugs 102 can be peeled off and removed, as shown in FIG. 11.

[0032] According to the inventor's test, it is preferable that the masking plugs 102 are stored in the bowl portion 74 of the cleaning container 70. It is also preferable to clean the masking plugs 102 while cleaning water is maintained in the stored cleaning water in the bowl portion 74, and it is most preferable to clean the masking plugs 102 while maintaining the level of the cleaning water near the boundary between the bowl portion 74 and the cylindrical portion 72. The position of the level of the cleaning water is set optimally depending on the shape and size of the workpiece to be actually cleaned (e.g., masking plugs 102, masking seal 104, etc.) and the amount of coating layer 106 attached (degree of dirt, etc.). In this case, it can be set to be changeable by appropriately controlling the number, shape, size, and opening position of the body slits 73, peripheral wall slits 75, and bottom through-holes 76 of the cleaning container 70. As already described above, when the sum of the opening areas of the multiple body slits 73 is X and the sum of the opening areas of the peripheral wall slits 75 and the bottom through-hole 76 is Y, for example, the size, number, arrangement, and positioning of the multiple body slits 73 are appropriately set so that X>Y.

[0033] Next, an example of a paint washing method for a painting jig using this paint washing device 10 will be described. First, a plurality of masking plugs 102 as workpieces to be cleaned are placed in the cleaning vessel 70, for example, in the bowl portion 74 of the cleaning vessel 70 [preparation process of masking plugs 102 (workpieces) to be cleaned]. Next, the cleaning container 70 is inserted through the front opening 13 of the front door 20, which has already been opened, and placed on the placement table 52 inside the cleaning booth 18 [step of setting the cleaning container in the cleaning booth 18]. Then, the front door opening / closing switches 98a, 98b are pressed to raise and close the front door 20. When the front door 20 closes, the automatic switch of the air cylinder is activated, and cleaning of the masking plug 102 in the cleaning container 70 begins [masking plug 102 (workpiece) cleaning process]. When the cleaning is completed, the air blow nozzle units 36a, 36b are activated and sequence controlled to blow off the cleaning water adhering to the masking plug 102 after cleaning and dry the masking plug 102, thereby drying the masking plug 102 after cleaning [drying process of the masking plug 102 (work)]. When the drying of the masking plug 102 is completed, the front door 20 is sequence-controlled to automatically descend and open, so that when the drying is completed, the front door 20 opens and the cleaning container 70 is removed from the mounting table 52 [cleaning container removal process].

[0034] In the above-described cleaning process, it is particularly preferable that the multiple masking plugs 102 are stored in the bowl portion 74 of the cleaning container 70 as shown in Fig. 10. It is also preferable to clean the masking plugs 102 (masking jig) stored in the bowl portion 74 of the cleaning container 70 while cleaning water is maintained in the stored cleaning water in the bowl portion 74, and it is most preferable to clean the masking plugs 102 while maintaining the water level of the cleaning water near the boundary between the bowl portion 74 and the cylindrical portion 72 as shown in Fig. 10. That is, it is further preferable that the above-mentioned cleaning process further includes a step of storing masking plug 102 in the cleaning container up to the boundary between cylindrical portion 72 and bowl portion 74 and its vicinity, and a step of spraying water sprayed from spray nozzle portion 34 onto masking plug 102 in a state in which water is stored within cleaning container 70 up to the boundary between cylindrical portion 72 and bowl portion 74 and its vicinity, to clean the masking plug.

[0035] In the paint cleaning device 10 for a painting jig according to one embodiment of the invention described above and the cleaning method using the same, unlike the conventional technology described above, no special cleaning agents, cleaning liquids, high boiling point solvents, etc. are required, and the painting jig (masking plug 102) can be cleaned with, for example, tap water. Also, unlike the conventional technology, no large-scale cleaning equipment is required for the cleaning work, and the handy cleaning container 70 has a simple structure in which it is appropriately inserted and removed from the cleaning booth 18. Furthermore, unlike the conventional technology, many cleaning steps are not required to clean the painting jig (masking plug 102), and the working time can be shortened. In other words, according to the painting jig cleaning device and cleaning method using the same of the present invention, it is possible to reliably clean the entire painting jig, such as a masking rubber, in a short time, and the device itself can be made smaller. In addition, it is possible to provide a painting jig cleaning device and cleaning method using the same that have no environmental problems and low running costs. [Explanation of symbols]

[0036] 10. Paint cleaning equipment for painting jigs 11 Base stand 11a, 11b Support base 12 Housing 12A Top plate 13 Front opening 14a, 14b, 15a, 15b Caster 16 Level Adjuster 18 Cleaning Booth 20 Front Door 22 Front door opening / closing actuator (air cylinder) 24 Tank section 26 High Pressure Pump Unit 28 High Pressure Pump 28A inlet 28B Discharge port 30 Drive motor 32 Anti-vibration rubber 33 Cover member 34 Injection nozzle part 36a, 36b Air blow nozzle part 38 Nozzle holder 40 Water supply pipe 42 Suction piping 44 Drainage piping 46 High Pressure Hose 50 Cleaning container holder 52 Placement table 54 Penetration of the loading table 56 Information Department 58 Retaining Plate 60a, 60b Retaining columns for holding the retaining plate 62a, 62b Support columns for supporting the guide of the cleaning cup 64a,64b Post 66a,66b Post 68a, 68b Positioning member (ball plunger) 69a, 69b Spare mounting holes 70 Cleaning container 72 Cylindrical part 72a Torso 73 Body slit 74 Bowl section 74a Hemispherical wall 75 Peripheral wall slit 76 Bottom through hole 78 Gripping part 80 Water catchment area 80A outlet 82 Filtration section 82A Mesh section 83 Filtration unit outlet cover 84 Level Gauge 86 Outlet 88 Control Panel 90 Control panel 92 Touch Panel 94 Emergency stop button 96 Power Switch 98a, 98b Front door opening / closing switch 100 Automobile brake parts 102 Masking plug (masking jig) 104 Masking seal (masking jig) 106 Paint layer (masking paint layer) 108 Crack

Claims

1. A paint cleaning device for a painting jig that cleans paint adhering to a masking jig that masks a masking portion of an object to be painted, comprising: a cleaning container holder for holding a cleaning container in which the masking tool is housed; a spray nozzle portion disposed above the cleaning container holder and configured to spray water at high pressure onto the masking jig; The cleaning vessel comprises: Cylindrical part, A bowl portion disposed on one axial side of the cylindrical portion; and A paint cleaning device comprising: a plurality of barrel through holes extending through a barrel of the cylindrical portion in a radial direction of the cylindrical portion.

2. 2. The paint cleaning device according to claim 1, wherein the bowl portion further includes a plurality of bowl portion through-holes disposed on both or either one of a peripheral surface and a bottom portion of the bowl portion and penetrating both or either one of the peripheral surface and the bottom portion.

3. 3. The paint washing device according to claim 2, wherein a sum of opening areas of the plurality of body through holes of the cylindrical portion is defined as X and a sum of opening areas of the plurality of bowl portion through holes of the bowl portion is defined as Y, and X>Y is satisfied.

4. 4. A paint washing method for a painting jig using the paint washing apparatus according to claim 1 or 3, comprising a washing step of spraying the water sprayed from the spray nozzle portion onto the masking jig while storing the water in the washing container, thereby washing the masking jig.

5. The washing step comprises: storing the masking jig in the cleaning container with the boundary between the cylindrical portion and the bowl portion and the vicinity of the boundary as an upper limit; and 5. The paint washing method according to claim 4, further comprising a step of spraying the water sprayed from the spray nozzle portion onto the masking jig to wash it while storing the water in the washing container up to an upper limit at and near the boundary between the cylindrical portion and the bowl portion.

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