JP2018045908A - Coating drying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat several different types of coating materials with different shapes, using the same induction heating coil group.SOLUTION: A coating drying device 1 is formed of an induction heating coil group 3; a coil supporting member 6 which allows the induction heating coil group 3 to be supported by a base member 2; a coil position changing mechanism 7 which changes the position of the coil supporting member 6 to the base member 2; and a controller 8 which has three-dimensional shape information of a coating material and provides movement information to the coil position changing mechanism 7. The position of the coil supporting member 6 to the base member 2 is changed in such a manner that the controller 8 provides the movement information to the coil position changing mechanism 7 based on the three-dimensional shape information of the coating material. It thus becomes possible to locate each upper coil element 3A, each lower coil element 3B, and each side coil element 3c of the induction heating coil group 3 near the coating material with a complicated shape and to heat several different types of coating materials with different shapes, using the same induction heating coil group 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coating drying apparatus that dries a coated object by induction heating, and particularly relates to a coating drying apparatus that is preferably used to dry a plurality of types of coated objects having different shapes.

  As a method for drying a large structure (a coating object) such as a hydraulic excavator that has been coated, a hot air drying furnace that blows hot air onto the coating object is known. In the coating drying method using this hot air drying furnace, the hot air temperature is set to be equal to or higher than the standard baking temperature of the coating material in order to prevent poor baking at a portion having a large heat capacity in the object to be coated. For this reason, in the coating drying method using a hot air drying furnace, a part with a small heat capacity among the objects to be coated is excessively heated, and energy saving is hindered. Also, in the coating drying method using a hot air drying furnace, the object to be coated is heated by indirect heat input that blows hot air on the object to be coated, so that the object to be coated reaches a desired temperature (baking temperature). There is a problem that it takes a long time and it is difficult to shorten the time required for the coating drying process.

  On the other hand, in order to save energy and shorten the coating drying process, a method of performing coating drying by induction heating is known. This coating drying method by induction heating generates magnetic lines of force around the coil by passing a high-frequency current through the coil, and generates eddy currents due to the influence of the magnetic lines of force inside the conductive object near the coil. is there. As a result, the object to be coated generates Joule heat by eddy current and is directly heated from the inside.

  Here, in order to use induction heating in order to efficiently dry the object to be coated, it is necessary to produce an induction heating coil having an arrangement corresponding to the shape of the object to be coated. For this reason, when there are a plurality of types of shapes of the object to be coated, it is necessary to produce a plurality of types of induction heating coils corresponding to the shape of the object to be coated.

  On the other hand, an induction heating coil group is configured in an induction heating apparatus that passes a workpiece (work) between a pair of induction heating coils opposed to each other to induce heating of the workpiece to be coated and dried. A plurality of coil elements can be arranged in parallel in the upper and lower directions with respect to the passing direction of the object to be coated, and the distance between the upper and lower directions of each coil element can be changed according to the size of the object to be coated. An induction heating apparatus having a configuration has been proposed. According to this induction heating device, each coil element can be brought close to the object to be coated by adjusting the distance between the upper and lower directions of each coil element. Therefore, a plurality of types of objects to be coated having different sizes can be heated using the same induction heating coil group, and the coating can be efficiently dried (see Patent Document 1).

JP 2012-138175 A

  However, the induction heating device according to the prior art has a configuration in which the interval between the plurality of coil elements constituting the induction heating coil group is changed upward and downward with respect to the passing direction of the article to be coated. For this reason, for example, when induction heating a plurality of types of objects whose three-dimensional shape changes, such as a track frame constituting a hydraulic excavator, an induction heating coil group is provided for the plurality of types of objects to be coated. It is difficult to approach the proper position. Therefore, in the induction heating apparatus according to the prior art, it is difficult to uniformly heat the object having a complicated shape in the heating region of the induction heating coil group, and it is efficient to apply a plurality of kinds of objects having different shapes. There is a problem that it cannot be dried well.

  The present invention has been made in view of the above-described problems of the prior art, and can appropriately heat a plurality of types of objects having different shapes using the same induction heating coil. An object of the present invention is to provide a paint drying apparatus that can be efficiently dried.

  In order to solve the above-described problems, the present invention provides a coating drying apparatus that heats and dries an object to be coated between a group of induction heating coils supported by a base member. The induction heating coil group arranged in parallel in a plurality of stages in the vertical and lateral directions, a coil support member for supporting the induction heating coil group on the base member, and between the coil support member and the base member A coil position changing mechanism provided to change the position of the coil support member with respect to the base member; and a controller that possesses three-dimensional shape information of the object to be coated and gives movement information to the coil position changing mechanism. It is said.

  According to the present invention, since the controller changes the position of the coil support member relative to the base member by giving the movement information to the coil position change mechanism based on the three-dimensional shape information of the article to be coated, the induction heating coil group Can be made to approach an object having a complicated shape. As a result, a plurality of types of objects to be coated having different shapes can be appropriately heated using the same induction heating coil group, and the coating of various objects to be coated can be efficiently dried.

It is a front view which shows the coating drying apparatus by embodiment of this invention with a to-be-coated object. It is a perspective view which shows the base member in FIG. 1, an induction heating coil group, a to-be-coated object, etc. It is the side view which looked at the base member, the induction heating coil group, the article to be coated, etc. from the direction of arrows III-III in FIG. It is a side view of the same position as Drawing 3 showing the state where a small article to be coated was arranged between base members. It is a side view which shows the state which changed the position of the induction heating coil group according to a small to-be-coated article. It is sectional drawing which looked at the base member and the coil position change mechanism from the arrow VI-VI direction in FIG. It is sectional drawing of the position similar to FIG. 6 which shows the state which moved the induction heating coil group by the coil position change mechanism. It is explanatory drawing which shows the structure of an induction heating coil group roughly. It is a block diagram which shows the connection state of a controller, an operating device, and a coil position change mechanism. It is a flowchart which shows the control processing which a controller performs at the time of the coating drying of a to-be-coated article.

  Hereinafter, embodiments of a coating and drying apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

  In the present embodiment, as an object to be coated, for example, a track frame constituting a lower traveling body of a hydraulic excavator is illustrated. The article 101 shows a large track frame, and the article 201 shows a small track frame. Here, as shown in FIG. 1 to FIG. 3, the article 101 includes a center frame portion 101a, a left side frame portion 101b that is disposed on the left side of the center frame portion 101a and extends in the front and rear directions, and a center frame portion. And a right side frame portion 101c which is disposed on the right side of 101a and extends in the front and rear directions. On the other hand, similarly to the article 101, the article 201 also includes a center frame part 201a, a left side frame part 201b, and a right side frame part 201c (see FIG. 4).

  The coating drying apparatus 1 heats a plurality of types of coating objects having different shapes such as the coating object 101 and the coating object 201 by induction heating, and dries the coating. Here, the paint drying apparatus 1 includes a base member 2, an induction heating coil group 3, a coil support member 6, a coil position changing mechanism 7, and a controller 8 which will be described later.

  The base member 2 is disposed in a paint drying booth where paint drying is performed, and supports the induction heating coil group 3 via a coil support member 6 described later. Here, the base member 2 is formed by using, for example, a hollow square pipe having a quadrangular cross-sectional shape, and a pair of upper surfaces facing each other with a larger distance than the length dimension in the front and rear directions of the large article 101. A base member 2a and a pair of lower base members 2b disposed below the upper base member 2a are provided. A space between the pair of base members 2 is an article placement space 2c.

  The upper base member 2a of the base member 2 as a whole is composed of two leg portions 2a1 opposed to each other with the lower base member 2b interposed therebetween, and a horizontal beam portion 2a2 connecting the upper ends of the two leg portions 2a1. It is formed in a gate shape with a U-shape. Here, as shown in FIG. 1, the distance A between the pair of base members 2 is set to be larger than the length dimension in the front and rear directions of the large article 101. Moreover, as shown in FIG. 3, the space | interval B of each leg part 2a1 of the upper base member 2a is set larger than the width dimension of the left and right direction of the large sized article 101. FIG. Furthermore, as shown in FIG. 4, the length dimension C of the lower base member 2b is set to be smaller than the distance between the left side frame portion 201b and the right side frame portion 201c of the small article 201 to be coated.

  The induction heating coil group 3 is arranged in parallel over a plurality of stages in the height direction and the lateral direction (left and right directions) of the workpiece 101. This induction heating coil group 3 is for induction heating the article 101 placed in the article placement space 2c.

  The induction heating coil group 3 includes a plurality of upper coil elements 3a spanned between the transverse beam portions 2a2 of the pair of upper base members 2a and a plurality of lower coil elements 3b spanned between the pair of lower base members 2b. And a plurality of side surface coil elements 3c spanned between the legs 2a1 of the pair of upper base members 2a. These upper coil element 3a, lower coil element 3b, and side surface coil element 3c are arranged in parallel in a plurality of stages in the height direction and the lateral direction of the article 101 to be coated.

  Here, as shown in FIG. 8, each upper coil element 3 a, each lower coil element 3 b, and each side surface coil element 3 c constituting the induction heating coil group 3 is made of a flexible material. By being connected by the hose 4, the whole is spirally continuous. In this way, the induction heating coil group 3 constitutes a continuous coil by the plurality of upper coil elements 3a, lower coil elements 3b, side surface coil elements 3c, and flexible hoses 4, and a pair of upper base members It is wound between 2a and between the lower base members 2b. And by supplying a high-frequency current from the high-frequency power source 5 to the continuous induction heating coil group 3, each upper coil element 3a induction-heats the upper part of the article 101, and each lower coil element 3b induction-heats the lower part of the to-be-coated object 101, and each side part coil element 3c induction-heats the side part of the to-be-coated object 101.

  The coil support member 6 supports the induction heating coil group 3 with respect to each upper base member 2 a and each lower base member 2 b constituting the base member 2. Here, the coil support member 6 includes a plurality of upper coil elements 3a constituting the induction heating coil group 3 and a plurality of lower coil elements 3b that support the transverse beam portions 2a2 of the upper base members 2a. There are a plurality of supporting members for the lower base member 2b and a plurality of supporting side surface coil elements 3c for the leg portions 2a1 of the upper base members 2a. That is, one coil support member 6 is provided between each upper coil element 3 a, each lower coil element 3 b, each side surface coil element 3 c and the base member 2 constituting the induction heating coil group 3.

  The coil position changing mechanism 7 is provided between the plurality of coil support members 6 and the base member 2, and changes the position of each coil support member 6 with respect to the base member 2. That is, the coil position changing mechanism 7 includes a plurality of coils provided between the cross beam portion 2a2 of the upper base member 2a and each coil support member 6, and a leg portion 2a1 of the upper base member 2a and each coil support member 6. And a plurality of parts provided between the lower base member 2b and each of the coil support members 6.

  Here, the coil position changing mechanism 7 provided between the cross beam portion 2a2 of the upper base member 2a and the coil support member 6 will be described with reference to FIGS. The coil position changing mechanism 7 is disposed in the transverse beam portion 2a2 of the upper base member 2a, and includes a driven gear 7a connected to the coil support member 6, a drive gear 7b engaged with the driven gear 7a, and a drive gear 7b. And a rotating motor 7c. Then, when the motor 7c rotates in the forward / reverse direction according to a control signal from the controller 8, which will be described later, the coil support member 6 moves upward and downward about the rotation shaft 7d of the driven gear 7a.

  Accordingly, the position of the upper coil element 3a supported by the coil support member 6 between the horizontal beam portions 2a2 of the pair of upper base members 2a is changed upward and downward, so that each upper coil element 3a is shaped. It is possible to approach different objects to be coated (for example, the objects to be coated 101 and 201). Similarly, by changing the position of the lower coil element 3b supported by the coil support member 6 between the pair of lower base members 2b, each lower coil element 3b is brought closer to the workpiece having a different shape. By changing the position of the side surface coil element 3c supported by the coil support member 6 between the leg portions 2a1 of the pair of upper base members 2a, the side surface coil elements 3c are coated with different shapes. It can be brought close to things.

  The controller 8 controls each coil position changing mechanism 7, the high frequency power source 5 and the like according to the type of the object to be dried. As shown in FIG. 9, the controller 8 includes a central processing unit (CPU) 8A, a storage unit (memory) 8b, and the like, and the storage unit 8b includes a large object 101 and a small object 201. Each three-dimensional shape information of a plurality of types of objects to be coated, and each upper coil element 3a, each lower coil element 3b, and each side surface coil element corresponding to the three-dimensional shapes of these plurality of types of objects to be coated 101, 201, etc. Position information 3c (coil element position information) is stored.

  An operating device 9 is connected to the input side of the controller 8, and by operating the operating device 9, information related to the type of object to be dried is input to the controller 8. The output side of the controller 8 is connected to the high frequency power source 5, the motor 7 c of each coil position changing mechanism 7, and the like.

  Here, for example, when the small object 201 is dried after the large object 101 is coated and dried in the object arrangement space 2 c, the controller 9 is instructed to the controller 9. Next, information on the object 201 to be dried is input. Thereby, the controller 8 acquires the three-dimensional shape information of the article 201 to be coated stored in the storage unit 8b, and each upper coil element 3a, each lower coil element 3b, each side surface part constituting the induction heating coil group 3. The position of the coil element 3 c is set to a position corresponding to the three-dimensional shape of the workpiece 201, and a control signal is output to the motor 7 c of each coil position changing mechanism 7.

  As a result, the motor 7c is driven, and the coil support member 6 moves downward about the rotation shaft 7d of the driven gear 7a (see FIG. 7). For this reason, the position of each coil support member 6 with respect to the base member 2 is changed. As shown in FIG. 5, the positions of the upper coil element 3a, the lower coil element 3b, and the side surface coil element 3c should be painted and dried next. It is changed in advance according to the shape of the article 201 to be coated.

  On the other hand, the controller 8 sets the frequency, voltage, heating time, etc. of the high-frequency power supply 5 according to the amount of heat necessary for drying the small object 201 and outputs a control signal to the high-frequency power supply 5. Thereby, the high frequency current according to the shape of the article 201 is supplied from the high frequency power source 5 to the induction heating coil group 3.

  The coating and drying apparatus 1 according to the present embodiment is configured as described above. Next, the operation of the coating and drying apparatus 1 is performed after the large-scale object 101 shown in FIG. The case where the small-size object 201 shown in FIG.

  First, as shown in FIG. 3, the large article 101 is placed in the article arrangement space 2 c between the pair of base members 2 while being placed on the large carriage 102. In this case, the article 101 is insulated from the ground by being mounted on the carriage 102.

  Here, before the article 101 is arranged in the article arrangement space 2 c, information related to the article 101 is input from the operation device 9 to the controller 8. Thereby, the controller 8 acquires the three-dimensional shape information of the workpiece 101 stored in the storage unit 8b, and each upper coil element 3a, each lower coil element 3b, and each side surface coil element of the induction heating coil group 3. The position 3c is set to a position corresponding to the three-dimensional shape of the workpiece 101, and a control signal is output to the motor 7c of each coil position changing mechanism 7. As a result, the upper coil element 3a, the lower coil element 3b, and the side coil element 3c are moved to positions corresponding to the shape of the article 101 in advance.

  In this state, the article 101 placed on the carriage 102 is carried into the article placement space 2c.

  On the other hand, the controller 8 sets the frequency, voltage, heating time, etc. of the high-frequency power supply 5 according to the amount of heat necessary for drying the large-sized article 101 and outputs a control signal to the high-frequency power supply 5. Thereby, a high frequency current corresponding to the shape of the article 101 is supplied from the high frequency power source 5 to the induction heating coil group 3. At this time, since the carriage 102 is insulated from the base member 2 and the ground, the current from the high-frequency power source 5 does not leak to the ground or the like.

  Thus, induction heating using the induction heating coil group 3 is performed on the article 101 arranged in the article arrangement space 2c. The upper part of the article 101 is induction-heated by the upper coil elements 3a constituting the induction heating coil group 3, the lower part of the article 101 is induction-heated by the lower coil elements 3b, and the upper side surface coil element 3c. As a result, the side surface portion of the article 101 is induction-heated. As a result, the object 101 having a complicated shape can be heated uniformly, and the application of the object 101 can be efficiently dried.

  In this way, after the coating drying on the large-sized object 101 is completed, the object 101 is carried out from the object arrangement space 2c. And it prepares for the coating drying operation | work with respect to the to-be-coated object (for example, small-sized to-be-coated object 201) to be dried next.

  Next, when the coating of the small object 201 is dried, information regarding the object 201 is input from the operation device 9 to the controller 8. Thereby, the controller 8 acquires the three-dimensional shape information of the workpiece 201 stored in the storage unit 8b, and each upper coil element 3a, each lower coil element 3b, each side surface coil element of the induction heating coil group 3 is acquired. The position of 3c is set to a position corresponding to the three-dimensional shape of the workpiece 201, and a control signal is output to the motor 7c of each coil position changing mechanism 7.

  As a result, the motor 7c is driven, and as shown in FIG. 7, the coil support member 6 moves downward about the rotation shaft 7d of the driven gear 7a, so that each of the upper coil elements 3a of the induction heating coil group 3 is moved. The position is changed according to the shape of the workpiece 201. Similarly, the coil position changing mechanism 7 changes the positions of the lower coil elements 3b and the side surface coil elements 3c according to the shape of the article 201 to be coated (see FIG. 5).

  In this state, the article 201 is carried into the article placement space 2c while being mounted on the small carriage 202. The carriage 202 has a shape corresponding to the size of the small object 201 and is insulated from the base member 2 and the ground in the same manner as the carriage 102. When the article 201 is carried into the article arrangement space 2c, the upper coil elements 3a are arranged close to the upper part of the article 201, and the lower coil elements 3b are arranged below the article 201. The side coil elements 3c are arranged close to the side surface of the article 201 to be coated.

  Then, the controller 8 sets the frequency, voltage, heating time, and the like of the high frequency power supply 5 according to the amount of heat necessary for drying the small object 201 and outputs a control signal to the high frequency power supply 5. As a result, a high frequency current corresponding to the shape of the article 201 is supplied from the high frequency power source 5 to the induction heating coil group 3.

  Thereby, the induction heating using the induction heating coil group 3 is performed on the article 201 arranged in the article arrangement space 2c. Then, the upper part of the article 201 is induction heated by the upper coil elements 3a constituting the induction heating coil group 3, the lower part of the article 201 is induction heated by the lower coil elements 3b, and the upper side surface coil element 3c. As a result, the side surface of the article 201 is induction-heated. As a result, the object 201 having a complicated shape can be heated uniformly, and the application of the object 201 can be efficiently dried.

  In this way, after the coating and drying of the small object 201 is completed, the object 201 is taken out of the object arrangement space 2c, and is prepared for the painting and drying operation for the object to be dried next. .

  Next, the control executed by the controller 8 when the paint drying for the current object to be coated (large object 101) is finished and the next object to be painted (small object 201) is to be dried. Processing will be described with reference to FIG.

  When this control process is started, it is determined in step 1 whether or not information related to the type of the object to be dried (for example, the object 201) is input from the operation device 9. If NO is determined in step 1, the process waits for an input from the controller device 9 in step 2 and returns to step 1. On the other hand, if YES is determined in step 1, the information related to the object 201 is input from the operation device 9, so that the process proceeds to step 3 and the three-dimensional shape of the object 201 stored in the storage unit 8 b. Get information.

  In the subsequent step 4, the three-dimensional shapes of the object to be coated (the object to be coated 101) that has been previously dried by drying and the object to be coated 201 that is to be dried this time are compared, and each of the upper parts constituting the induction heating coil group 3 It is determined whether it is necessary to change the positions of the coil element 3a, the lower coil elements 3b, and the side coil elements 3c. If it is determined YES in step 4, the three-dimensional shape of the previous object to be coated (for example, the object 101 to be coated) and the current object to be coated 201 are different, and each upper coil element 3a and each lower coil element 3b. Since the position of each side coil element 3c needs to be changed, the process proceeds to step 5.

  In step 5, a control signal is output to the motor 7c of each coil position changing mechanism 7, and the position of each upper coil element 3a, each lower coil element 3b, each side coil element 3c of the induction heating coil group 3 is coated. The position is changed to a position corresponding to the three-dimensional shape of the article 201, and in the subsequent step 6, the carrying-in of the article 201 into the article arrangement space 2c is instructed.

  On the other hand, if the previous object to be coated is the same type as the current object 201, it is necessary to change the positions of the upper coil elements 3a, the lower coil elements 3b, and the side surface coil elements 3c. Therefore, NO is determined in step 4 and step 6 is executed.

  In the subsequent step 7, the frequency, voltage, heating time, etc. of the high frequency power source 5 are set according to the amount of heat necessary for drying the article 201, and the process proceeds to step 8. In step 8, by outputting a control signal to the high frequency power source 5, a high frequency current corresponding to the shape of the article 201 is supplied from the high frequency power source 5 to the induction heating coil group 3. Thereby, induction heating using the induction heating coil group 3 is performed on the article 201 to be coated.

  Thus, after induction heating for the heating time set for the article 201 is performed, the process proceeds to step 9. In step 9, an instruction is given to carry out the article 201 that has finished painting and drying from the article arrangement space 2c. And after instruct | indicating carrying-out of the to-be-coated article 201, it returns to step 1 and repeats the control process mentioned above.

  Thus, the paint drying apparatus 1 according to the present embodiment changes the position of the induction heating coil group 3, the coil support member 6 that supports the induction heating coil group 3 on the base member 2, and the position of the coil support member 6 relative to the base member 2. A coil position changing mechanism 7 for controlling the three-dimensional shape of the object to be coated, and a controller 8 for giving movement information to the coil position changing mechanism 7. The controller 8 is based on the three-dimensional shape information of the object to be coated. By giving movement information to the coil position changing mechanism 7, the position of the coil support member 6 relative to the base member 2 can be changed.

  The induction heating coil group 3 includes a plurality of upper coil elements 3a for induction heating the upper part of the object to be coated, a plurality of lower coil elements 3b for induction heating the lower part of the object to be coated, and a side surface portion of the object to be coated. It is comprised by the some side part coil element 3c to carry out induction heating.

  Thereby, each upper coil element 3a, each lower coil element 3b, and each side surface coil element 3c which comprise the induction heating coil group 3 can be made to approach the to-be-coated object which has a complicated shape. As a result, it is possible to appropriately heat a plurality of types of objects to be coated such as the objects to be coated 101, 201 using the same induction heating coil group 3, thereby efficiently coating various objects to be coated. Since it can be dried, it is possible to realize energy saving in the paint drying operation.

  The controller 8 includes a storage unit 8b that stores three-dimensional shapes of a plurality of types of objects to be coated and coil element position information corresponding to the plurality of types of objects to be coated, and each upper coil of the induction heating coil group 3. The element 3a, the lower coil elements 3b, and the side coil elements 3c are moved in advance to positions corresponding to the three-dimensional shape of the article to be coated. As a result, even if the three-dimensional shape of the object to be coated this time is different from the object to be coated next time, the upper coil elements 3a and the lower coils of the induction heating coil group 3 are different. The element 3b and each side coil element 3c are moved in advance to a position corresponding to the three-dimensional shape of the object to be coated next time, so that the next object is rapidly heated by induction. be able to. Therefore, it is possible to shorten the time of the paint drying process.

  The coil position changing mechanism 7 includes a driven gear 7a connected to the coil support member 6, a drive gear 7b engaged with the driven gear 7a, and a motor 7c for rotating the drive gear 7b. The position of the coil support member 6 relative to the base member 2 can be changed by the controller 8 controlling the motor 7c based on the three-dimensional shape of the object to be coated, and the induction heating coil supported by the coil support member 6 The positions of the upper coil elements 3a, the lower coil elements 3b, and the side surface coil elements 3c of the group 3 can be easily changed.

  In the embodiment, the case where the position of the coil support member 6 with respect to the base member 2 is changed using the coil position change mechanism 7 including the driven gear 7a, the drive gear 7b, the motor 7c, and the like has been described as an example. For example, the coil position changing mechanism may be configured using a linear motion mechanism such as a linear motor or a link mechanism.

DESCRIPTION OF SYMBOLS 1 Paint drying apparatus 2 Base member 3 Induction heating coil group 3a Upper coil element 3b Lower coil element 3c Side surface coil element 6 Coil support member 7 Coil position change mechanism 7a Driven gear 7b Drive gear 7c Motor 8 Controller 8b Memory | storage part 101 Coating Object 201

Claims (4)

In a coating drying apparatus for drying by induction heating by placing an object to be coated between groups of induction heating coils supported by a base member,
The induction heating coil group arranged in parallel over a plurality of stages in the height direction and the lateral direction of the article;
A coil support member for supporting the induction heating coil group on the base member;
A coil position changing mechanism provided between the coil support member and the base member for changing the position of the coil support member relative to the base member;
A coating drying apparatus comprising: a controller that possesses three-dimensional shape information of the object to be coated and provides movement information to the coil position changing mechanism.   The induction heating coil group includes an upper coil element for induction heating the upper part of the object to be coated, a lower coil element for induction heating the lower part of the object to be coated, and a side part for induction heating the side part of the object to be coated. The coating and drying apparatus according to claim 1, comprising a coil element.   The controller includes a storage unit that stores a three-dimensional shape of a plurality of types of objects to be coated and coil element position information corresponding to the plurality of types of objects to be coated, and the coating to be dried on the induction heating coil group. The paint drying apparatus according to claim 1, wherein the paint drying apparatus is moved in advance to a position corresponding to the three-dimensional shape of the object.   The coil position changing mechanism includes a driven gear connected to the coil support member, a drive gear meshing with the driven gear, and a motor that rotates the drive gear, and is based on the three-dimensional shape of the object to be coated. The paint drying apparatus according to claim 1, wherein the position of the coil support member relative to the base member is changed by the controller controlling the motor.

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