JP6492666B2 - Hot air rectifier and paint drying method - Google Patents

Description

  The present invention relates to a hot air rectifier and a paint drying method.

  In the car body painting line, various types such as electrodeposition coating, intermediate coating and top coating, and rust prevention treatment are performed with lids such as doors and hoods attached to the body shell body for the purpose of productivity improvement and color matching. Processing is performed. In intermediate coating and top coating, the vehicle body to be coated is placed on the coating carriage, the coating is applied while being transported through the painting booth, and then the automobile body is loaded together with the painting carriage into the coating drying furnace. Then, the wet coating film is baked and dried. The coating drying apparatus used in the painting line is provided with a hot-air supply duct in a tunnel-shaped drying furnace body, blows hot air over the entire automobile body transported in the drying furnace body, and burns and dries the wet coating film ( Patent Document 1).

Japanese Patent Publication No. 6-225

  Bake curable coatings are used for automobile bodies. For example, in the case of intermediate coating or top coating, holding at 140 ° C. for 20 minutes is the standard for quality assurance of cured coatings. However, in the conventional paint drying apparatus, hot air does not easily flow into a narrow portion such as around the hinge of the door due to the structure of the automobile body, compared to the outer plate portion where hot air is easily blown. For this reason, there is a problem that it is difficult to satisfy the quality assurance standard such as holding at 140 ° C. × 20 minutes for the narrow portion.

  The problem to be solved by the present invention is to provide a hot air rectifier and a coating drying method that satisfy the drying conditions of the wet coating film over the entire automobile body in the coating drying apparatus.

  The present invention blows hot air blown from a hot air outlet provided in a drying furnace main body to an automobile body including an outer plate portion and a narrow portion, and dries a coating film applied to the automobile body. The above problem is solved by deflecting the flow direction of the hot air blown from the hot air outlet of the drying furnace body in the direction toward the narrow portion by the deflecting plate of the hot air rectifier attached to the head.

  According to the present invention, hot air is caused to collide with a deflecting plate mounted on an automobile body, thereby deflecting the flow direction of the hot air in a direction toward the narrow portion of the automobile body. Thereby, drying of the coating film applied to the narrow portion is promoted, and predetermined drying conditions can be satisfied.

It is a whole process figure showing an example of the painting line to which one embodiment of the top coat painting drying device and method concerning the present invention is applied. It is a whole process figure which shows the other example of the coating line to which one embodiment of the top coat drying apparatus and method which concerns on this invention is applied. It is a side view which shows the state which mounted the motor vehicle body which concerns on 1st Embodiment of this invention in the coating trolley | bogie. It is the front view which looked at the front door of the automobile body concerning one embodiment of the present invention from the room inner side. It is the front view which looked at the rear door of the motor vehicle body which concerns on one embodiment of this invention from the indoor side. It is sectional drawing which follows the 2D-2D line | wire of FIG. 2B. It is sectional drawing which follows the 2E-2E line | wire of FIG. 2A, Comprising: It is sectional drawing which shows an example of the narrow part containing a front pillar, a front door, and a hinge. It is sectional drawing which follows the 2F-2F line | wire of FIG. 2A, Comprising: It is sectional drawing which shows an example of the narrow part containing a center pillar, a rear door, and a hinge. It is a disassembled perspective view which shows an example of the hinge of FIG. 2B and FIG. 2C. It is the figure which looked at the state which opened the front door of the automobile body concerning one embodiment of the present invention from the back of the body shell main part. It is a side view which shows schematic structure of the top coat coating drying apparatus which concerns on one embodiment of this invention. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 1 is a side view showing a schematic configuration of a hot air rectifier according to an embodiment of the present invention. It is a top view which shows schematic structure of the hot air rectifier which concerns on one embodiment of this invention. It is the figure which looked at the state which attached the hot-air rectifier to the open front door of the motor vehicle body which concerns on one embodiment of this invention from the back of the body shell main body. It is a perspective view which shows an example of the door stopper jig | tool used with the top coat coating drying apparatus which concerns on one embodiment of this invention. It is sectional drawing which follows the 7B-7B line | wire of FIG. 7A, Comprising: It is sectional drawing which shows the mounting state of a door stopper jig | tool.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the following embodiments, the best embodiment of the present invention will be described by taking the top coat coating drying apparatus 1 to which the coating drying apparatus and the coating drying method of the present invention are applied as an example. However, the coating drying apparatus and the coating drying of the present invention will be described. The method can be applied to an intermediate coating drying device, an undercoating drying device (electrodeposition coating drying device), or an intermediate coating / top coating drying device described later, in addition to the top coating drying device.

  The hot-air rectifier 60 in this embodiment is mounted on the automobile body B, and in this state, the automobile body is conveyed into the top coat drying apparatus 1 and the top coat drying process P52 of the coating line PL is performed. In the following description, first, an outline of an automobile production line and a coating line PL, an automobile body B, and a top coat drying apparatus 1 will be described, and then the hot air rectifier 60 will be described in detail.

  The automobile production line has four main lines: a press molding line PRL, a body assembly line (also referred to as a welding line) WL, a painting line PL, and a vehicle assembly line (also referred to as an outfitting line) ASL. It is composed of In the press molding line PRL, various panels constituting the automobile body B are respectively press-molded and conveyed to the vehicle body assembly line WL in the state of a single press. In the vehicle body assembly line WL, sub-assemblies are assembled for each part of the automobile body such as the front body, center floor body, rear floor body, and side body, and welding is performed on predetermined parts of the assembled front body, center floor body, and rear floor body. The underbody is assembled, and the side body and the roof panel are welded to the underbody to assemble the body shell main body B1 (referring to the body shell excluding the lid). Finally, lid parts such as a hood F, side doors D1 and D2, and a trunk lid T (or back door) assembled in advance are mounted on the body shell main body B1 via a hinge. Then, after passing through the painting line PL, it is conveyed to the vehicle assembly line ASL, and various automobile parts such as an engine, a transmission, a suspension device, and interior parts are assembled to the finished body shell.

  Next, the main structure of the coating line PL will be described. FIG. 1A and FIG. 1B are all process diagrams showing a coating line PL including a top coating drying apparatus to which the coating drying apparatus and method according to the present invention are applied. The coating line PL of the embodiment shown in FIG. 1A is a coating line by a three-coat three-bake coating method of undercoating, intermediate coating, and topcoating. On the other hand, in the coating line PL of the embodiment shown in FIG. 1B, the intermediate coating and the top coating are wet-on-wet in the same coating booth (the coating is applied on the uncured coating, the same applies hereinafter). This is a coating line by a 3-coat 2-bake coating method in which the intermediate coating film and the top coating film are simultaneously baked in the same coating drying furnace. Thus, the coating drying apparatus and method of the present invention can be applied to any of coating lines having different coating methods. In addition, this 3 coat 3 bake coating method and 3 coat 2 bake coating method are modified, and the 4 coat coating method in which the intermediate coating is applied twice, and the case where the top coating color is a special color with 2 tones are also used. The coating drying apparatus and method according to the present invention can be applied by modifying a part of a typical coating line PL. Hereinafter, the painting lines of FIGS. 1A and 1B will be described in parallel, but the same reference numerals will be given to common configurations, and description will be made with reference to the painting line of FIG. 1A. Both coatings of FIGS. 1A and 1B Differences between the lines will be described with reference to FIG. 1B.

  The coating line PL of the embodiment shown in FIG. 1A includes an undercoating process P1, a sealing process P2, an intermediate coating process P3, a water polishing process P4, an overcoating process P5, and a coating completion inspection process P6. In contrast, the coating line PL of the embodiment shown in FIG. 1B includes an undercoat process P1, a sealing process P2, an intermediate coating / top coating process P7, and a coating completion inspection process P6. That is, in the coating line PL of FIG. 1B, the two steps of the intermediate coating step P31 and the top coating step P51 shown in FIG. 1A are performed in one step of the intermediate coating / top coating step P71 of FIG. In addition, the two steps of the intermediate coating drying step P32 and the top coating drying step P52 shown in FIG. 1A are performed in one step of the intermediate coating / top coating drying step P72 of FIG. 1B. The intermediate coating / top coating process P7 of FIG. 1B will be described later.

  As shown in FIGS. 1A and 1B, the undercoat process P1 includes a pre-electrodeposition treatment process P11, an electrodeposition coating process P12, and an electrodeposition drying process P13. In the electrodeposition pretreatment process P11, the automobile body B (white body) transferred from the carriage of the vehicle body assembly line WL to the painting hanger (not shown) by the drop lifter D / L is transferred to a predetermined pitch by an overhead conveyor. It is continuously transported at a predetermined transport speed. The configuration of the automobile body B will be described later.

  Although not shown, the electrodeposition pretreatment process P11 generally includes a degreasing process, a water washing process, a surface adjustment process, a chemical conversion film forming process, a water washing process, and a draining process. The car body B that is carried into the painting line PL is attached with press oil, iron powder and other dust from welding in the press molding line PRL and the car body assembly line WL, so this is washed in the degreasing process and the water washing process. And remove. In the surface adjustment step, the surface adjustment agent component is adsorbed on the surface of the automobile body B, and the number of reaction starting points in the chemical conversion film forming step of the next step is increased. The adsorbed surface conditioner component becomes the core of the film crystal and accelerates the film formation reaction. In the chemical conversion film forming step, the chemical conversion film is formed on the surface of the automobile body B by immersing the automobile body B in a chemical conversion treatment solution such as zinc phosphate. In the water washing step and the water draining step, the automobile body B is washed with water and dried.

  In the electrodeposition coating process P12, the automobile body B that has been subjected to the pretreatment in the electrodeposition pretreatment process P11 is continuously transported at a predetermined pitch and a predetermined transport speed by an overhead conveyor. Then, the automobile body B is immersed in a ship-type electrodeposition tank filled with the electrodeposition paint, and a plurality of electrode plates provided in the electrodeposition tank and the automobile body B (specifically, having electric conductivity). Apply a high voltage to the paint hanger. Thereby, an electrodeposition coating film is formed on the surface of the automobile body B by the electrophoretic action of the electrodeposition paint. Examples of the electrodeposition paint include a thermosetting paint having an epoxy resin such as a polyamine resin as a base resin. As the electrodeposition paint, a cationic electrodeposition paint that applies a positive high voltage to the electrodeposition paint side is preferably used for rust prevention, but an anionic electrodeposition paint that applies a positive high voltage to the vehicle body B side. May be used.

  The automobile body B coming out of the electrodeposition tank in the electrodeposition coating process P12 is conveyed to the water washing process, and the electrodeposition paint adhering to the automobile body B is washed away using industrial water or pure water. At this time, the electrodeposition paint taken out from the electrodeposition tank at the time of unloading is also collected in this water washing step. At the stage where the water washing treatment is completed, an undried electrodeposition coating film having a thickness of about 10 μm to 35 μm is formed on the surface of the automobile body B and the bag structure. When the electrodeposition coating process P12 is completed, the automobile body B mounted on the coating hanger is transferred to the coating carriage 50 (described later with reference to FIG. 2A) by the drop lifter D / L. The drop lifter D / L installed between the electrodeposition coating process P12 and the electrodeposition drying process P13 shown in FIGS. 1A and 1B is installed between the electrodeposition drying process P13 and the sealing process P2. In the electrodeposition drying process P13, the automobile body may be transported in a state of being mounted on a paint hanger.

  In the electrodeposition drying process P13, the automobile body B mounted on the painting carriage is continuously conveyed by the floor conveyor at a predetermined pitch and a predetermined conveying speed. And it is baked and dried by holding a temperature of 160 ° C. to 180 ° C. for 15 minutes to 30 minutes, for example, so that a dry electrodeposition coating film having a film thickness of 10 μm to 35 μm is formed in the inner and outer plates and the bag structure part of the automobile body B. Is formed. In addition, from the electrodeposition drying process P13 to the coating completion inspection process P6, the coating carriage 50 on which the automobile body B is mounted is continuously conveyed by the floor conveyor, but the conveyance pitch and conveying speed of the coating carriage 50 in each process are as follows. According to the process. Therefore, the floor conveyor is constituted by a plurality of conveyors, and the conveyance pitch and conveyance speed in each process are set to predetermined values.

  In the present specification and claims, the term “paint” such as electrodeposition paint, intermediate coating and top coating refers to the liquid state before being applied to an object to be coated. The term “coating film” such as a film and a top coating film refers to an undried (wet) or dried state that has been applied to an object to form a film, and the two are distinguished.

  In the sealing process P2 (including the undercoat process and the stone guard coat process), the automobile body B on which the electrodeposition coating film has been formed is transported, and the purpose is to prevent rust or seam at the steel sheet joint or the steel plate edge. A vinyl chloride resin sealing material is applied. In the undercoat process, a vinyl chloride resin-based chipping resistant material is applied to the tire house and the floor of the automobile body B. In the stone guard coating process, a polyester-based or polyurethane-based resin chipping resistant material is applied to the lower part of the body outer plate such as a side sill, a fender, or a door. In addition, these sealing materials and chipping resistant materials are cured in a dedicated drying step or an intermediate coating drying step P32 described below.

  The intermediate coating process P3 of the coating line PL in FIG. 1A includes an intermediate coating process P31 and an intermediate coating drying process P32. In the intermediate coating process P31, the automobile body B on which the electrodeposition coating film is formed is conveyed to the intermediate coating booth, and in the intermediate coating booth, on the inner plate portion of the automobile body such as the engine room, the hood inner, the trunk lid inner, An inner plate coating paint to which a coloring pigment corresponding to the outer plate color of the vehicle is added is applied. Then, the intermediate coating is applied to the outer plate such as the hood outer, the roof, the door outer, and the trunk lid outer (or the back door outer) by wet-on-wetting on the inner plate coating film. The outer plate portion is a portion that can be seen from the outside of the finished vehicle that has finished the outfitting process, and the inner plate portion is a portion that cannot be seen from the outside of the finished vehicle.

  In the intermediate coating drying process P32 of the coating line PL in FIG. 1A, the automobile body B is conveyed to the intermediate coating drying apparatus. And an undried intermediate coating film is baked and dried by holding a temperature of 130 ° C. to 150 ° C. for 15 to 30 minutes, for example, and an intermediate coating of a film thickness of 15 μm to 35 μm is applied to the outer plate portion of the automobile body B A film is formed. In addition, a coating film for coating an inner plate having a film thickness of 15 μm to 30 μm is formed on the inner plate portion of the automobile body B. The inner plate paint and the intermediate paint are thermosetting paints using acrylic resin, alkyd resin, polyester resin or the like as a base resin, and may be either water-based paint or organic solvent-based paint.

  In the water-polishing process P4 of the painting line PL in FIG. 1A, the automobile body B that has been finished up to the intermediate coating process P3 is transported, and the surface of the intermediate coating film formed on the automobile body B using clean water and abrasives is removed. Grind. Thereby, the coating film adhesion between the intermediate coating film and the top coating film is improved, and the smoothness (coating skin and sharpness) of the top coating film on the outer plate portion is improved. This water research process P4 includes a water research drying process P41. In this water research drying process P41, the automobile body B passes through the draining and drying furnace, thereby drying the water adhering to the automobile body B.

  The top coating process P5 of the coating line PL in FIG. 1A includes a top coating process P51 and a top coating drying process P52. In the top coating process P51, the automobile body B that has finished the water research process P4 and the water research drying process P41 is transported. Then, in the top coat booth, the top coat base paint is applied to the outer plate portion of the automobile body B, and the top coat clear paint is applied to the outer plate portion of the automobile body B by wet on wet.

  The topcoat base paint and the topcoat clear paint are paints that use acrylic resin, alkyd resin, polyester resin, or the like as a base resin, and may be either water-based paints or organic solvent-based paints. The top coat base paint is applied after being diluted to about 80% by weight in consideration of the finish properties such as the orientation of the glitter pigment (solid content is about 20% to 40%). Is diluted to about 30% by weight and applied (solid content is about 70% to 80%). However, the top coating base paint generally has a coating solid content of 70% or more in a flash-off process after application (a stationary process in which the solvent spontaneously evaporates in the booth).

  The outer plate color of the automobile body B of the present embodiment is a metallic outer plate color including various bright pigments such as aluminum and mica, and the top coat base paint and the top coat clear paint are applied to the automobile body B. It is not limited to this. For example, the outer body color of the automobile body B may be a solid outer panel color. The solid outer plate color is a paint color that does not contain a luster pigment. In this case, the top coat base paint is not applied, and the top coat solid paint is applied instead of the top clear paint. As such a top coat solid paint, a base resin paint similar to the top coat base paint or the top coat clear paint can be exemplified.

  In the top coat drying process P52 of this embodiment, the automobile body B to which the top coat paint is applied in the top coat booth is conveyed to the top coat drying apparatus 1. In this top coat drying process P52, the automobile body B passes through the top coat drying apparatus 1 under conditions of 130 ° C. to 150 ° C. and 15 to 30 minutes, and the coating applied to the automobile body B is baked and dried. Is formed. In addition, the specific structure of the top coat drying apparatus 1 of this embodiment is mentioned later.

  The film thickness of the topcoat base coating film is, for example, 10 μm to 20 μm, and the film thickness of the topcoat clear coating film is, for example, 15 μm to 30 μm. When the outer plate color of the automobile body B is a solid outer plate color, the film thickness of the top coat solid coating film is, for example, 15 μm to 35 μm. Finally, the automobile body (painted body) that has been painted is transported to the coating completion inspection process P6, where various inspections for evaluating the appearance of the coating film, the sharpness, and the like are performed.

  On the other hand, in the coating line PL shown in FIG. 1B, instead of the intermediate coating process P3, the water polishing process P4 (including the water polishing drying process P41) and the top coating process P5 shown in FIG. P7 is provided. The intermediate coating / top coating step P7 of this embodiment includes an intermediate coating / top coating step P71 and an intermediate coating / top coating drying step P72.

  In the intermediate coating / top coating process P71 of the coating line PL shown in FIG. 1B, the automobile body B on which the electrodeposition coating film is formed is transported to the intermediate coating / top coating booth, and in the first half zone of the intermediate coating / top coating booth, the engine room -An inner plate coating paint to which a coloring pigment corresponding to the outer plate color of the vehicle is added is applied to an inner plate portion of an automobile body such as a hood inner or a trunk lid inner. Then, the intermediate coating is applied to the outer plate such as the hood outer, the roof, the door outer, and the trunk lid outer (or the back door outer) by wet-on-wetting on the inner plate coating film. Next, in the second half zone of the intermediate coating / top coating booth, the top coat base paint is applied to the outer plate portion of the automobile body B, and this top coat base coat is wet-on-wet, and the top coat clear paint is applied to the outer plate portion of the automobile body B. Is painted. That is, the inner coating, intermediate coating, top coating base and clear coating are all applied wet-on-wet and simultaneously baked and dried in one top coating drying oven. Note that the wet coating applied to the automobile body B after applying the intermediate coating or the top coating is applied in order to suppress problems caused by repeated application of the wet coating and deterioration in sharpness. A flash-off step for increasing the coating NV of the film may be provided. As in the coating line PL shown in FIG. 1A, the base plate coating paint, intermediate coating, top coating base and clear coating used in this embodiment are made of an acrylic resin, alkyd resin, polyester resin or the like as a base. It is a thermosetting paint used as a resin, and may be either a water-based paint or an organic solvent-based paint.

  Next, an example of the automobile body B applied to the painting line PL of the present embodiment will be described in detail with reference to FIGS. 2A to 2G. FIG. 2A is a side view showing a state in which the automobile body according to the first embodiment of the present invention is mounted on a painting cart, and FIG. 2B is a front view of the front door of the automobile body according to the embodiment of the present invention as viewed from the indoor side. 2C is a front view of the rear door of the automobile body according to the embodiment of the present invention as viewed from the indoor side, FIG. 2D is a sectional view taken along line 2D-2D in FIG. 2B, and FIG. 2E is 2E- in FIG. 2C is a cross-sectional view taken along line 2E, showing an example of a narrow portion including a front pillar, a front door, and a hinge. FIG. 2F is a cross-sectional view taken along line 2F-2F in FIG. FIG. 2G is an exploded perspective view showing an example of the hinge of FIGS. 2B and 2C, and FIG. 2H is an opening of the front door of the automobile body according to the embodiment of the present invention. The body Is a view from the rear of the reel body.

  As shown in FIG. 2A, the automobile body B of the present embodiment includes a body shell main body B1, a hood F that is a lid part, a front door D1, a rear door D2, and a trunk lid T. A front door opening B2 and a rear door opening B3 are formed on both side surfaces of the body shell body B1. The front door opening B2 is an opening defined by the front pillar B4, the center pillar B5, the roof side rail B8, and the side sill B9 of the body shell main body B1. The rear door opening B3 is an opening defined by the center pillar B5, the rear pillar B10, the roof side rail B8, and the side sill B9 of the body shell main body B1. Hereinafter, the front door opening B2 and the rear door opening B3 are collectively referred to as door openings B2 and B3. The trunk lid T as a lid part shown in the figure may be a back door depending on the vehicle body B type.

  Since the automobile body B of the present embodiment is a four-door sedan vehicle type as shown in the figure, the side door D has a front door D1 and a rear door D2. In the case of a two-door sedan or a two-door coupe, only the front door D1 and the front door opening B2 are provided, and the rear door D2 and the rear door opening B3 are not provided. The front door D1 of this embodiment is disposed so as to correspond to the front door opening B2, and the rear door D2 is disposed so as to correspond to the rear door opening B3. The vehicle body B in the present embodiment corresponds to an example of the vehicle body according to the present invention, the body shell main body B1 in the present embodiment corresponds to an example of the vehicle body in accordance with the present invention, and the front door D1 in the present embodiment. The side door D including the rear door D2 corresponds to an example of the side door according to the present invention, and in the case of the above-described two-door sedan or two-door coupe, the front door D1 corresponds to an example of the side door according to the present invention.

  As shown in FIG. 2D, the front door D1 has a door panel D10 and a door sash D11. The door panel D10 has a door outer panel D101 and a door inner panel D102. The door outer panel D101 faces the outside of the automobile body B, and the door inner panel D102 faces the indoor side of the automobile body B. Between these panels D101 and D102, a space D103 for accommodating a door glass (not shown) is formed. At the upper end of the door outer panel D101, a door outer panel folded portion D101a is formed in which the end of the panel member is folded back toward the space D103. Further, at the upper end of the door inner panel D102, a door inner panel folded portion D102a is formed in which the end of the panel member is folded back toward the space D103. A door glass insertion portion D104 through which the door glass can enter and exit from the space D103 is formed in a gap between the door outer panel folding portion D101a and the door inner panel folding portion D102a. The door glass insertion portion D104 is formed in a slit shape along the upper end of the door panel D10.

  A door sash D11 is provided above the door panel D10, and a door glass opening D12 is defined by the upper end side of the door panel D10 and the door sash D11. When a part or all of the door glass accommodated in the space D103 is exposed to the outside, the door glass is inserted into the door glass opening D12 through the door glass insertion part D104. Although the rear door D2 has a slight difference in shape, the basic structure is the same as that of the above-described front door D1, and the illustration is omitted. The door outer panel folded portion D101a in the present embodiment corresponds to an example of the upper side of the door outer panel according to the present invention, and the door inner panel folded portion D102a in the present embodiment corresponds to an example of the upper side of the door inner panel according to the present invention. And the door glass penetration part D104 in this embodiment is equivalent to an example of the clearance gap between the upper side of the door outer panel which concerns on this invention, and the upper side of a door inner panel.

  As shown in FIGS. 2B and 2D, the front door D1 is provided with hinges H1 at two upper and lower positions on the front end portion (the front side of the vehicle body B). Further, as shown in FIGS. 2C and 2E, the rear door D2 is provided with hinges H2 at two upper and lower positions on the front end (the front side of the vehicle body B). Although the hinges H1 and H2 for mounting the front door D1 and the rear door D2 on the body shell body B1 so as to be freely opened and closed are slightly different in shape, the basic structure is the same. Both hinges H1 are shown, and the other hinge H2 is not shown by attaching the corresponding reference numerals in parentheses.

  As shown in FIG. 2F, the hinge H1 has two hinge brackets H11 and H12 and a hinge pin H13. The hinge bracket H11 is attached to the door inner panel D102 of the front door D1 via bolts (not shown), and the hinge bracket H12 is attached to the front pillar B4 of the body shell main body B1 via bolts (not shown). Yes. The hinge pin H13 is inserted into the four holes of the two hinge brackets H11 and 12, and is fixed by caulking or press-fitting. Accordingly, the hinge brackets H11 and H12 are coupled so as to be rotatable around the hinge pin H13.

  In the vehicle body assembly line WL, the hinge pin H13 is inserted into the four holes of the two hinge brackets H11 and 12, and the subassembly parts of the hinge H1 fixed by caulking or press-fitting are assembled in advance, and this is carried into the final process. . Before mounting the front door D1 on the body shell main body B1, one of the hinge brackets H11 of the subassembly parts of the hinge H1 is bolted to the front door D1, and then the front door D1 is connected to the front door of the body shell main body B1. The opening B2 is set using a jig or the like, and the other hinge bracket H12 is bolted to the front pillar B4. Thereby, the front door D1 can be opened and closed by rotating around the hinge pin H13.

  Similarly, the hinge H2 has two hinge brackets H21 and H22 and a hinge pin H23 as indicated by the reference numerals in parentheses in FIG. 2F. The hinge bracket H21 is attached to the rear door D2 via a bolt (not shown), and the hinge bracket H22 is attached to the center pillar B14 of the body shell main body B1 via a bolt (not shown). The hinge pin H23 is inserted into the holes of the two hinge brackets H21 and 22 and fixed by caulking or press-fitting. Accordingly, the hinge brackets H21 and H22 are coupled so as to be rotatable around the hinge pin H23. That is, the rear door D2 can be opened and closed by rotating around the hinge pin H23. Hereinafter, the hinge H1 and the hinge H2 are collectively referred to as a hinge H. The hinge H in the present embodiment corresponds to an example of a hinge part according to the present invention.

  In the automobile body B of the present embodiment, as shown in FIGS. 2D, 2E, and 2G, narrow portions N1 and N2 having a narrow interval are formed between the body shell main body B1 and the side door D. Specifically, as shown in FIGS. 2D and 2G, a narrow portion N1 having a narrow interval is formed in the vicinity of the hinge H1 between the front pillar B4 of the body shell main body B1 and the front door D1, as shown in FIG. 2E. As shown, a narrowed portion N2 having a narrow interval is formed in the vicinity of the center pillar B5 of the body shell main body B1 and the hinge H2 between the rear door D2. In particular, in the vicinity of the hinges H1 and H2, regardless of whether the front door D1 or the rear door D2 is open / closed, the hinges H1 and H2 are obstructed so that hot air from the paint drying device 1 is difficult to flow around. It is hard to be heated compared with the outer plate part. Accordingly, it is difficult to maintain a predetermined temperature, which is a quality assurance standard for the coating film, for a predetermined time or longer. 2D and 2E indicate the range of top coating, and the symbol WS similarly indicates the side door D1 for sealing between the side doors D1, D2 and the door openings B2, B3. , D2 is a weather strip to be mounted. In particular, the coating range from the weather strip WS to the outdoor side is severe with respect to the rust environment, and is a part that requires coating quality such as adhesion of the coating film in addition to the quality of appearance. Hereinafter, the narrow portion N1 and the narrow portion N2 are collectively referred to as the narrow portion N. The narrow portion N in the present embodiment corresponds to an example of the narrow portion according to the present invention.

  Returning to FIG. 2A, the automobile body B described above is transported from the electrodeposition drying process P13 to the coating completion inspection process P6 in FIGS. 1A and 1B while being mounted on the painting carriage 50. The painting cart 50 of the present embodiment is a rectangular frame in plan view, and is composed of a base 51 made of a rigid body capable of supporting the automobile body B, and four provided on the lower surface of the base 51. It has a wheel 54, two front attachments 52 and two rear attachments 53 provided on the upper surface of the base 51. The left and right front attachments 52 respectively support the left and right front under bodies B6 (front side members and the like) of the automobile body B, and the left and right rear attachments 53 are the left and right rear under bodies B7 (rear side members and the like) of the automobile body B. Support each. The automobile body B is horizontally supported by these four attachments 52 and 53. The four wheels 54 rotate along the rails 41 laid on the left and right sides of the transport conveyor 40.

  Next, the top coat drying apparatus 1 of this embodiment will be described. FIG. 3 is a side view showing a schematic configuration of the top coat drying apparatus according to the embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.

  As shown in FIGS. 3 and 4, the topcoat drying apparatus 1 of this embodiment includes a drying furnace body 10, a hot air supply apparatus 20, and an exhaust apparatus 30. As shown in the side view of FIG. 3, the drying furnace body 10 of the present embodiment includes an ascending inclined portion 11 on the inlet side, a descending inclined portion 13 on the exit side, and an ascending inclined portion 11 and a descending inclined portion 13. It is a drying furnace having a mountain shape including a raised floor portion 12 therebetween. Further, as shown in the cross-sectional view of FIG. 4, the drying furnace is a rectangle having a ceiling surface 14, a pair of left and right side surfaces 15, 15 and a floor surface 16. In the side view of FIG. 3, the left side is the top coating setting zone at the end of the top coat booth TB and the inlet side of the drying furnace body 10, and the right side is the outlet side of the drying furnace body 10, and the automobile body B mounted on the coating carriage 50. Is conveyed forward from left to right in FIG. That is, the automobile body B transported in the top coat drying apparatus 1 of the present embodiment is transported in the left direction shown in FIG. 2A. Note that the present invention is not particularly limited to the above, and the automobile body B may be transported backward in the top coat drying apparatus 1.

  The height of the floor surface 16 of the raised floor 12 of the drying furnace body 10 is substantially the same as the height of the upper opening edge of the opening of the drying furnace body 10 and the upper edge of the opening of the outlet of the drying furnace body 10. Yes. Thereby, it can suppress that the hot air supplied to the high floor part 12 escapes from the entrance or exit to the drying furnace main body 10 outside. In addition, on the floor surface 16 of the drying furnace body 10, a transfer conveyor 40 is laid along the extending direction of the drying furnace body 10 to transfer the painting carriage 50 on which the automobile body B is mounted. In this embodiment, the drying furnace body 10 is a mountain type drying furnace, but may be a flat type drying furnace. The flat-type drying furnace is a drying furnace that is uniformly formed on a flat surface and does not have the upward inclined portion 11 on the inlet side and the downward inclined portion 13 on the outlet side. By using such a flat drying furnace, the capital investment cost can be reduced as compared with the above-mentioned mountain drying furnace. The drying furnace body 10 in the present embodiment corresponds to an example of a drying furnace body according to the present invention.

  The hot air supply device 20 is a facility for supplying the generated hot air into the raised floor portion 12 of the drying furnace body 10, and as shown in FIG. 4, an air supply fan 21, an air supply filter 22, a burner 23, The air supply duct 24 and the hot air outlet 25 are provided. The air supply fan 21 is a facility for supplying air sucked from the outside to the inside of the raised floor portion 12 of the drying furnace body 10. The air supply filter 22 is connected to the primary side (air intake side) of the air supply fan 21, filters the air intake from the outside, and separates dust and the like. Thereby, clean air is sucked into the air supply fan 21. The burner 23 is connected to the secondary side (air discharge side) of the air supply fan 21 and heats the air discharged from the air supply fan 21 to a predetermined temperature. Thereby, the sucked air is supplied as hot air into the raised floor 12 of the drying furnace body 10.

  As shown in FIG. 4, the air supply duct 24 is arranged on each of the left and right side surfaces 15 and 15 of the raised floor portion 12 of the drying furnace body 10 along the conveyance direction of the automobile body B. The hot air outlet 25 includes a plurality of rectangular slits (openings) formed at predetermined intervals along the extending direction of the air supply duct 24 disposed in the raised floor portion 12 of the drying furnace body 10, and, if necessary, It is comprised by the wind direction board provided in the slit. The hot air outlet 25 is provided so that the opening of each slit or the wind direction plate is directed toward the center of the drying furnace body 10, whereby hot air supplied by the air supply fan 21 is conveyed through the drying furnace body 10. It will be sprayed on the car body B. Moreover, in this embodiment, the vehicle body B arrange | positions the opening of the hot air blower outlet 25 toward the downstream according to the conveyance state which made the vehicle body front part of the said vehicle body B the front side. The side door D is attached to the body shell B1 via a hinge H provided at the front end portion thereof, and opens toward the upstream side in the transport state in which the vehicle body front portion of the automobile body B is the front side. Since the side door D opens and closes, the opening of the hot air outlet 25 faces the downstream side, so that hot air can be easily blown toward the narrow portion N between the body shell B1 and the side door D. The hot air outlet 25 in the present embodiment corresponds to an example of the hot air outlet according to the present invention.

  As shown in FIG. 4, the exhaust device 30 is a facility for discharging the solvent evaporated in the drying furnace body 10 to the outside of the system, and includes an exhaust fan 31, an exhaust filter 32, an exhaust duct 33, and exhaust suction. And a mouth 34. The exhaust fan 31 is a device that sucks the hot air in the drying furnace body 10 and discharges it outside the system of the drying furnace body 10 or circulates it to the primary side of the hot air supply device 20. Controls the function of removing hot air pressure and adjusting hot air pressure. The exhaust filter 32 is provided on the secondary side (the side from which hot air is discharged) of the exhaust fan 31. Hot air is sucked by the exhaust fan 31, passes through the exhaust filter 32, is discharged outside the system, or returned to the hot air supply device 20. The exhaust duct 33 is provided on each of the left and right side surfaces 15 and 15 of the drying furnace body 10 along the conveyance direction of the automobile body B. The exhaust suction port 34 includes slits formed at predetermined intervals in the exhaust duct 33 disposed in the drying furnace body 10.

  Next, the hot air rectifier 60 in the present embodiment will be described in detail with reference to FIGS. 5A, 5B, and 6. FIG. 5A is a side view showing a schematic configuration of a hot air rectifier according to an embodiment of the present invention, FIG. 5B is a plan view showing a schematic configuration of a hot air rectifier according to an embodiment of the present invention, and FIG. It is the figure which looked at the state which attached the hot-air rectifier to the open front door of the motor vehicle body which concerns on one embodiment of invention from the back of the body shell main body. The hot air rectifier 60 in the present embodiment corresponds to an example of the hot air rectifier according to the present invention.

  As shown in FIGS. 5A and 5B, the hot air rectifier 60 includes a deflection plate 61 and a mounting leg portion 62. The deflecting plate 61 has a flat plate shape and is formed of a rigid body that is not deformed by the pressure with which hot air collides. The deflection plate 61 is made of a heat-resistant material that does not cause thermal deformation even when hot air is blown. Although it does not specifically limit as a specific example of the material which comprises such a deflection | deviation plate 61, For example, metal materials, such as steel, can be illustrated. The deflection plate 61 has a deflection surface 611 that deflects the direction of the blown hot air. The deflection surface 611 of the present embodiment is a smooth surface having no irregularities on the surface. The deflection surface 611 is not particularly limited to the above, and may have a curved shape, or may be subjected to a surface treatment or the like for the purpose of reducing friction during hot air collision. The deflection plate 61 in the present embodiment corresponds to an example of a deflection plate according to the present invention.

  The mounting leg 62 includes two mounting leg members 63 and a plurality of bars 64a to 64c. The mounting leg member 63 includes a hook-shaped member 631 that supports the deflecting plate 61 and a mounting member 632 that mounts the deflecting plate 61 on the automobile body B. The hook-shaped member 631 has an arm portion 631a and a support column 631b. The arm part 631a is a bar-like member extending along the horizontal direction, and the column 631b is a bar-like member extending along the vertical direction.

  The hook-shaped member 631 has a joint portion J1 in which one end portion (the left end portion in the figure) of the arm portion 631a and the upper end portion of the column 631b are rigidly joined. The other end (the right end in the figure) of the arm portion 631a is rigidly joined to the deflection surface 611 of the deflection plate 61, whereby the deflection plate 61 is supported by the hook-like member 631. The length of the arm portion 631a and the length of the column 631b are appropriately set according to the positional relationship between the hot air outlet 25 and the narrow portion N. Thereby, the deflecting plate 61 is arrange | positioned in the position which faces the hot air blower outlet 25 and the narrow part N. FIG.

  The mounting member 632 includes two insertion members 632a and 632b and a connecting member 632c. The insertion members 632a and 632b are rod-like members arranged substantially parallel to each other along the vertical direction. The connecting member 632c is a rod-like member extending along the horizontal direction. One end of the coupling member 632c and the upper end of the insertion member 632a are rigidly joined, and the other end of the coupling member 632c and the upper end of the insertion member 632b are rigidly joined. . As a result, the mounting member 632 has a U-shape with the lower part opened as a whole. A portion where one end of the connecting member 632c and the upper end of the insertion member 632a are rigidly joined is referred to as a joint portion J2, and the other end of the connecting member 632c and the upper end of the insertion member 632b are connected to each other. The part where is rigidly joined is designated as a joint J3. Note that the lower end portion of the column 631b and the upper end portion of the insertion member 632a are rigidly connected, so that the flange-shaped member 631 and the mounting member 632 are connected.

  The two mounting leg members 63 are provided side by side, and a plurality of bars 64 a to 64 c are provided between the mounting leg members 63. The 1st crosspiece 64a is a rod-shaped member, and is provided so that between connection part J1 in each member 63 for mounting legs may be connected. The 2nd crosspiece 64b is a rod-shaped member, and is provided so that between connection part J2 in each member 63 for mounting legs may be connected. The 3rd crosspiece 64c is a rod-shaped member, and is provided so that the connection part J3 in each member 63 for mounting legs may be connected.

  As with the deflection plate 61, the mounting leg 62 is made of a material having heat resistance. Although it does not specifically limit as a specific example of the material which comprises such a mounting leg part 62, For example, the material similar to the material which comprises the above-mentioned deflection plate 61 can be illustrated. The mounting leg 62 in the present embodiment corresponds to an example of the mounting leg according to the present invention.

  The hot air rectifier 60 in the present embodiment can be attached to the side door D of the automobile body B. And the flow of a hot air is made to collide the hot air which blows off from the hot-air blower outlet 25 arrange | positioned along the side surface 15 which opposes the side door D with which the hot-air rectifier 60 was mounted | worn with the deflection surface 611 of the said hot-air rectifier 60. The direction is deflected toward the narrow portion N. The hot air rectifier 60 can be attached to either the front side door D1 or the rear side door D2, but in the following description, the hot air rectifier 60 is a left side as viewed from the rear side of the vehicle body B (upstream side in the conveying direction). The hot air rectifier 60 attached to the front side door D1 will be described.

  In the top coat drying apparatus 1 of this embodiment, as shown in FIG. 6, in the final repair process at the top coat booth TB initial end coat coat booth end or top coat booth end at the upstream side of the drying furnace body 10, The hot air rectifying device 60 is mounted on the front side door D1 by a person's manual work. In addition, the side door D of this embodiment is opened to such an extent that the width of the existing drying furnace does not increase, and is fixed by the door stopper jig 100. The door stopper jig 100 shown in FIGS. 7A and 7B is attached to the hole B91 and the flange B92 of the side sill B9 and abuts on a portion hidden by the fitting parts of the door inner panel D102 so that the side door D does not close to the closing limit. It is a jig for.

  When the hot air rectifier 60 is attached to the front side door D1, the two insertion members 632a and 632b are inserted into the door glass insertion portion D104 of the front side door D1. In the present embodiment, the interval between the insertion members 632a and 632b (including the diameter of the insertion members 632a and 632b) is substantially the same as the width of the door glass insertion portion D104, and the insertion members 632a and 632b. Is inserted into the door glass insertion portion D104, the insertion member 632a contacts the door inner panel folding portion D102a, and the insertion member 632b contacts the door outer panel folding portion D101a. On these contact surfaces, the hot air rectifier 60 is fixed to the front side door D1 by generating a frictional force.

  Since the portion facing the door glass insertion portion D104 of the door panel D10 is an inner plate portion that cannot be visually recognized from the outside of the finished vehicle, even if the hot air rectifying device 60 is worn and a scratch occurs, the appearance of the finished vehicle is improved. The impact of is low. If the hot air rectifier 60 is mounted so as to cover the outer plate portion, the drying condition of the coating film may be deteriorated in the portion where the hot air rectifier 60 is mounted. It is preferable to be attached to the part.

  In the present embodiment, when the hot air rectifying device 60 is mounted on the automobile body B, the deflection plate 61 is disposed above the narrow portion N1 between the front side door D1 to which the hot air rectifying device 60 is mounted and the body shell B1. As seen from the side surface 15 side, it is arranged behind the door glass opening D12 of the front side door D1. Further, since the deflecting plate 61 of the present embodiment is arranged so that the deflecting surface 611 faces the hot air outlet 25 and the narrowed portion N1, the hook-shaped member is tilted so that the deflecting surface 611 faces downward. 631 is fixed.

  After the hot air rectifier 60 is mounted on the front side door D1, the automobile body B is conveyed into the drying furnace body 10 by the conveyor 40. And in the drying furnace main body 10, the motor vehicle body B and hot air contact, and the drying of the coating film apply | coated to the said motor vehicle body B is accelerated | stimulated.

  In the high floor portion 12 in the drying furnace body 10, a hot air outlet 25 is provided along the conveyance direction of the automobile body B. The hot air outlet 25 located above blows hot air through the door glass opening D12 of the side door D toward the interior of the automobile body B and the narrow part N. In the narrow part N, the door panel of the side door D is blown. D10 (specifically, the door outer panel D101), the door sash D11, and the like are obstructed and hot air does not easily enter, and is harder to heat than the outer plate portion of the automobile body B.

  On the other hand, in this embodiment, the deflection plate 61 is arrange | positioned in the back | inner side of the door glass opening D12, and the hot air blown out from the hot air blower outlet 25 deflects the deflection plate 61 through the door glass opening D12. Collides with surface 611. The deflection plate 61 of this embodiment is inclined so that the deflection surface 611 faces downward, and the hot air that has collided with the deflection surface 611 is guided by the deflection surface 611 and the flow direction is deflected downward. The deflecting plate 61 is located above the narrowed portion N1, and the deflected hot air is blown onto the narrowed portion N1, and drying of the coating film applied to the narrowed portion N1 is promoted.

  Further, in the present embodiment, in response to the opening of the hot air outlet 25 being provided so as to face the downstream side, the deflection surface 611 of the deflection plate 61 is fixed in an inclined state so as to face the upstream side. doing. Thus, by making the opening of the hot air outlet 25 and the deflecting surface 611 face each other, the hot air easily collides with the deflecting surface 611, and the amount of the hot air whose flow direction is deflected toward the narrow portion N is large. Become.

  After the automobile body B has passed through the drying furnace body 10, a hot air rectifier is provided by an operator's manual operation or the like in a coating completion inspection process P <b> 6 (see FIGS. 1A and 1B) provided on the downstream side of the drying furnace body 10. 60 is recovered. At this time, the hot air rectifier 60 has a structure that can be easily removed. In addition, the collect | recovered hot air rectifier 60 can be conveyed to topcoat booth TB in an upstream, and can be used repeatedly.

  According to the top coat drying apparatus 1 of the present embodiment, the following operational effects are obtained.

  Due to its structure, the automobile body B is mostly configured to include a part that is easily hit by hot air and a part that is hard to hit. For example, even if the narrow portions N1, N2 in the vicinity of the hinges H1, H2 of the side door D are flowed to the top coat drying apparatus 1, hot air does not easily flow around and it is difficult to raise the temperature. For this reason, if the temperature rise time is set so that the narrow portion N does not meet the predetermined quality assurance standard and satisfies the quality assurance standard of the coating film applied to the narrow portion N, the coating drying furnace becomes longer and the capital investment increases. Invite.

  On the other hand, in the present embodiment, the hot air is caused to collide with the deflecting plate 61 mounted on the vehicle body B via the mounting legs 62, so that the flow direction of the hot air is directed toward the narrow portion N of the vehicle body B. To be biased. Thereby, drying of the coating film applied to the narrow portion N is promoted, and the temperature raising time of the narrow portion N is shortened. As a result, the narrow portion N also satisfies predetermined drying conditions, and further suppresses the length of the drying furnace body 10 to be reduced, thereby reducing the equipment investment. Moreover, space saving of the coating line PL is achieved by suppressing the lengthening of the drying furnace body 10.

  In the present embodiment, the hot air deflected by the deflecting plate 61 is blown to the narrow portion N, so that the temperature of the narrow portion N is easily raised, and the drying of the coating film applied to the narrow portion N is promoted. . Thereby, the drying condition of the coating film of the narrow part N does not satisfy the quality assurance standard, and so-called baking sweetness is generated, and the deterioration of the coating film quality such as the coating film performance deterioration and the coating film peeling is suppressed. Can do.

  Moreover, since the hot air rectifier 60 of this embodiment can be used repeatedly, the running cost of the top coat drying process P52 can be reduced.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

PRL ... Press molding line WL ... Car body assembly (welding) line ASL ... Vehicle assembly (fitting) line PL ... Paint line P1 ... Undercoat process (electrodeposition process)
P11 ... Electrodeposition pretreatment process P12 ... Electrodeposition coating process P13 ... Electrodeposition drying process P2 ... Sealing process P3 ... Intermediate coating process P31 ... Intermediate coating process P32 ... Intermediate coating drying process P4 ... Water research process P41 ... Water research drying Process P5 ... Top coat process P51 ... Top coat coating process P52 ... Top coat drying process P6 ... Coating finish inspection process P7 ... Intermediate coating / top coating process P71 ... Intermediate coating / top coating coating process P72 ... Intermediate coating / top coating drying process D / L ... Drop lifter B ... Automobile body B1 ... Body shell body B2 ... Front door opening B3 ... Rear door opening B4 ... Front pillar B5 ... Center pillar B6 ... Front underbody B7 ... Rear underbody B8 ... Roof side rail B9 ... Side sill B10 ... Rear pillar B11 ... Front fender B12 ... Rear fender B13 ... Roof ... Food T ... trunk lid D ... side door D1 ... front door D10 ··· door panel D101 ··· door outer panel
D101a ... Outer panel folding part D102 ... Door inner panel
D102a ... Inner panel folding part D103 ... Space D104 ... Door glass insertion part D11 ... Door sash D12 ... Door glass opening H1 (H) ... Hinge H11, H12 ... Hinge bracket H13 ... Hinge pin D2 ... Rear door H2 (H) ... Hinges H21, H22 ... Hinge brackets H23 ... Hinge pins N1, N2 ... Narrow part 1 ... Top coat drying device 10 ... Dry furnace body 11 ... Upward inclined part 12 on the inlet side 12 ... High floor part 13 ... Exit Downward inclined portion 14 side ... ceiling surface 15 ... side surface 16 ... floor surface 20 ... hot air supply device 21 ... air supply fan 22 ... air supply filter 23 ... burner 24 ... air supply duct 25 ... hot air outlet 30 ... exhaust device 31 ... exhaust fan 32 ... exhaust filter 33 ... exhaust duct 34 ... exhaust air inlet 40 ... conveyor 41 ... rail DESCRIPTION OF SYMBOLS 0 ... Paint trolley 51 ... Base 52 ... Front attachment 53 ... Rear attachment 54 ... Wheel 60 ... Hot air rectifier 61 ... Deflection plate 611 ... Deflection surface 62 ... Installation leg part 63 ... Installation Leg member 631... Bowl-shaped member 631 a... Arm part 631 b... Post 632... Mounting member 632 a, 632 b .. insertion member 632 c .. connection member 64 a to 64 c. ~ J3 ... Junction TB ... Top coat booth

Claims (5)

An automobile body including an outer plate portion and a narrow portion is conveyed into a drying furnace body, hot air is blown from the hot air outlet provided in the drying furnace body to the automobile body, and the outer plate portion and the narrow portion are When drying the coated film, the hot air blown from the hot air outlet is applied to the automobile body to control the flow direction of the hot air to accelerate the drying of the coated film applied to the narrow part. A hot air rectifier
A deflecting plate that is disposed facing the hot air outlet and the narrow portion, and deflects the flow direction of the hot air toward the narrow portion by applying the hot air blown from the hot air outlet,
A hot-air rectifier comprising: a mounting leg that mounts the deflection plate on the automobile body. The hot air rectifier according to claim 1,
The automobile body is
Body body,
A side door assembled to the vehicle body, and
The mounting leg is a hot air rectifier inserted into a gap between an upper side of the door outer panel of the side door and an upper side of the door inner panel of the side door. The hot air rectifier according to claim 2,
The narrow portion is a hot air rectifier that is a gap including a hinge portion between the vehicle body and the side door. An automobile body including an outer plate portion and a narrow portion is conveyed into a drying furnace body, hot air is blown from the hot air outlet provided in the drying furnace body to the automobile body, and the outer plate portion and the narrow portion are A coating drying method for drying a coated film,
Before transporting the automobile body into the drying furnace body,
A deflecting plate that is disposed facing the hot air outlet and the narrow portion, and deflects the flow direction of the hot air toward the narrow portion by applying the hot air blown from the hot air outlet,
Mounting a hot air rectifier on the vehicle body, the mounting leg portion mounting the deflection plate on the vehicle body;
Removing the hot air rectifier after the automobile body has passed through the drying furnace body. It is the coating drying method of Claim 4, Comprising:
The mounting legs of the hot air flow straightener is inserted the upper side of the door outer panel of Sa Idodoa in the gap between the upper side of the door inner panel of the side door,
The coating and drying method, wherein the deflecting plate of the hot air rectifying device deflects the hot air blown from the hot air outlet toward a narrow portion including a hinge portion between a vehicle body of the automobile body and the side door.

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