JP2011011189A - Inside paint coating method and inside paint coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inside paint coating method and coating apparatus which do not cause uneven coating or defective coating for a wide variety of raw covers.SOLUTION: The inside paint coating method and coating apparatus include the step S1 of distinguishing raw cover information, the step S2 of taking in the size data corresponding to the raw cover information, the chain data conversion step S3 of converting the size data into chain data of the chain conveyer width of a chain conveyer, the step S4 of adjusting the chain conveyer, the step S5 of setting the raw cover stopping position, the step S6 of stopping transporting the raw cover to an inside paint application area and at the same time stopping the raw cover at a raw cover stopping position, the spray gun position setting step S7 of setting the height position of a spray gun, the spray gun position adjustment step S8 of adjusting the position of the spray gun, and the inside paint application step S9 of spraying an inside paint by the spray gun 7 and applying the inside paint to the inner face of the raw cover.

Description

  The present invention relates to an inside paint application method for applying an inside paint to the inner surface of a raw cover and an inside paint application apparatus used therefor, and more particularly to an inside paint application method and an inside paint application apparatus that improve the occurrence of poor paint application.

  Conventionally, when a tire is vulcanized and molded, a raw cover (also referred to as a green tire or a green tire) is used as a raw cover (the rubber is not vulcanized and the tire groove is not formed in the tread portion). Is pressed and contacted, and vulcanized in a state where the mold is in contact with the outside. During this vulcanization molding, air is likely to remain between the raw cover and the bladder, and there is a possibility that a bear may be generated. Therefore, an inside paint such as a release agent is applied to the inner surface of the raw cover before the vulcanization molding.

  As an apparatus for applying the inside paint to the low cover, an application apparatus using a spray gun that applies and arranges a spray gun on the inside of a generally laid down low cover is used (see, for example, Patent Document 1).

  An example of a conventional inside paint coating apparatus is shown in FIG. FIG. 8 is a side view showing a schematic configuration of a conventional inside paint coating apparatus. A conventional inside paint coating apparatus includes a spray gun 101, a lifting device 102 of the spray gun 101, a rotating portion 103, a connecting portion 104, a raw cover conveying device (not shown), and a detecting device (not shown) for detecting the size of the raw cover. It is composed of

Japanese Patent Laid-Open No. 10-5656

  However, the conventional inside paint coating apparatus roughly divides the size of the raw cover, adjusts the stop position of the raw cover based on the size, and adjusts the vertical position of the spray gun. Specifically, the detection device that detects the size of the raw cover detects the diameter of the raw cover in, for example, three stages of large, medium, and small, and detects the width of the raw cover in, for example, two stages of large and small. Then, when applying the inside paint, the raw cover transport device stops the transport based on the detection result regarding the diameter divided into the three stages of large, medium and small. Further, the lifting device 102 adjusts the position of the spray gun 101 in the vertical direction based on the detection result regarding the width divided into the two large and small steps, and performs application. However, with such an inside paint applicator, the spray gun position cannot be set to a fine and appropriate position for a wide variety of raw covers, resulting in application irregularities such as application unevenness and application to the outer surface of the raw cover. There was a fear.

  FIG. 9 is a diagram for explaining the state of such poor coating. (A) is a case where the position of the spray gun 101 is adjusted to the position of the small-sized low cover 112 regardless of the case where the inside paint is applied to the large-sized low cover 111. On the contrary, (b) shows the case where the position of the spray gun 101 is adjusted to the case of the large size low cover 111 regardless of the case where the inside paint is applied to the small size low cover 112.

  In the case of (a), the inside paint from the spray gun 101 is only discharged to the straight triangular portion, and the inside paint is not applied to the upper shaded portion, resulting in uneven coating.

  In the case of (b), the inside paint discharged from the spray gun 101 scatters in a mist form on the upper shaded portion, the inside paint adheres to the surface of the small-sized low cover 112, and the low cover 112 becomes scrap. End up.

  Therefore, an object of the present invention is to provide an inside paint coating method and a coating apparatus that do not cause a coating unevenness or a coating failure in applying inside paint to a wide variety of raw covers.

The inside paint method according to the present invention includes:
An inside paint application method for applying inside paint by an inside paint apparatus provided with a spray gun capable of adjusting the position in the vertical direction on the inner surface of the raw cover conveyed in the horizontal direction while being laid down by the chain conveyor,
A raw cover information identifying step for identifying raw cover information identifying the size and shape of the raw cover carried into the standby position of the inside paint device;
A size for fetching size data relating to a distance between a pair of beads corresponding to the raw cover information identified by the raw cover information identification step, a bead diameter, and an outer diameter of the raw cover from size data for each raw cover information of various raw covers stored in advance Data capture process;
A chain data conversion step of converting the size data acquired by the size data acquisition step into chain data of the chain conveyor width of the chain conveyor;
A chain conveyor adjustment step of adjusting the chain conveyor width of the inside paint device based on the chain data obtained by the chain data conversion step;
A raw cover stop position setting step for setting a raw cover stop position based on the size data;
A raw cover transporting / stopping process for transporting the raw cover to the inside paint application area and stopping the raw cover at the raw cover stop position set by the raw cover stop position setting process;
A spray gun position setting step of setting a height position of the spray gun based on the size data;
A spray gun position adjusting step of adjusting the position of the spray gun to the spray gun height position set by the spray gun position setting step;
An inside paint applying step of discharging the inside paint from the spray gun whose position has been adjusted by the spray gun position adjusting step and applying the inside paint to the inner surface of the raw cover.

Moreover, the inside paint coating apparatus according to the present invention is
An inside paint coating apparatus including a chain conveyor that transports a raw cover in a horizontal state in a horizontal state, a spray gun, and a lifting device that lifts and lowers the spray gun vertically.
Raw cover information identifying means for identifying raw cover information identifying the size and shape of the raw cover carried into the standby position of the inside paint device;
A size for fetching size data relating to a distance between a pair of beads corresponding to the raw cover information identified by the raw cover information identifying means, a bead diameter, and an outer diameter of the raw cover from size data for each raw cover information of various raw covers stored in advance Data capture means;
Chain data conversion means for converting the size data acquired by the size data acquisition means into chain data of the chain conveyor width of the chain conveyor;
Chain conveyor adjusting means for adjusting the chain conveyor width of the inside paint device based on the chain data obtained by the chain data converting means;
Raw cover stop position setting means for setting a raw cover stop position based on the size data;
A raw cover transporting / stopping means for transporting the raw cover to the inside paint application area and stopping the raw cover at the raw cover stop position set by the raw cover stop position setting means;
Spray gun position setting means for setting the height position of the spray gun based on the size data;
Spray gun position adjusting means for adjusting the position of the spray gun to the spray gun height position set by the spray gun position setting means;
Inside spray coating means for discharging inside paint from the spray gun whose position has been adjusted by the spray gun position adjusting means and applying it to the inner surface of the raw cover.

Furthermore, the inside paint coating apparatus according to the present invention is
The lifting device is motor-driven.

  ADVANTAGE OF THE INVENTION According to this invention, in the inside paint application | coating with respect to a wide variety of raw covers, the inside paint application method and the application | coating apparatus which do not have a possibility of an application | coating nonuniformity and application | coating defect can be provided.

It is a perspective view which shows notionally the outline of the principal part of the inside paint coating apparatus which concerns on one embodiment of this invention. It is a side view which shows the principal part of the inside paint coating apparatus which concerns on one embodiment of this invention. It is a block diagram of the coating control apparatus which controls the inside paint coating apparatus which concerns on one embodiment of this invention. It is a figure which shows typically the size and shape of various raw covers. It is a figure explaining the distance (bead-to-bead) tread width, outer diameter, and bead diameter between a pair of beads for each of two types of raw covers having different shapes when viewed from the side. It is a figure explaining the example of raw cover information, such as a size and shape of a raw cover. It is a flowchart which shows the inside paint application | coating method which concerns on one embodiment of this invention. It is a side view which shows schematic structure of the conventional inside paint coating device. It is a figure explaining the mode of the application failure in the conventional inside paint application.

  Hereinafter, the present invention will be described based on embodiments. Note that the present invention is not limited to the following embodiments. Various modifications can be made to the following embodiments within the same and equivalent scope as the present invention.

1. Configuration of Main Part of Inside Paint Application Device (1) Overall Outline of Inside Paint Application Device FIG. 1 is a perspective view conceptually showing an outline of the main part of the inside paint application device of the present embodiment.

  The main part of the inside paint coating apparatus of the present embodiment includes a belt conveyor 21, a chain conveyor 8, a spray gun 7, a lifting device 50 that lifts and lowers the spray gun 7, and various driving devices that are not shown in the drawings that drive and control them. Consists of a control device.

  The raw cover T0 conveyed by the belt conveyor 21 is transferred onto the chain conveyor 8 after the barcode 160 provided on the surface of the raw cover T0 is read by a barcode reader (not shown), and is transferred by the chain conveyor 8. The conveyance is continued, and the conveyance by the chain conveyor 8 is stopped at a predetermined position set based on the information read by the barcode reader.

  Next, the spray gun 7 is lifted from an elevating device 50 (not shown) provided below the chain conveyor 8, and the spray gun is positioned at the center of the raw cover T0 based on the information read by the bar code reader. The rise of 7 stops. Thereafter, the inside paint is discharged from the spray gun 7 and applied to the inner surface of the raw cover T0.

  After the application of the inside paint is completed, the spray gun 7 is lowered, and the raw cover T0 is conveyed again by the chain conveyor 8, and further transferred to the belt conveyor 21 and conveyed to the next process.

(2) Raw Cover Transport Mechanism and Spray Gun Drive Mechanism Next, the raw cover transport mechanism and the spray gun drive mechanism in the present embodiment will be described.

  FIG. 2 is a side view showing the main part of the inside paint coating apparatus of the present embodiment.

I. Low Cover Conveying Mechanism In FIG. 2, 1 is a controller for controlling the entire inside paint coating apparatus, 5 is a spray gun drive mechanism, 7 is a spray gun, 8 is a chain conveyor, and T0 is applying inside paint. It is a raw cover. In addition, in order to avoid drawing becoming complicated, illustration of a part of chain conveyor is abbreviate | omitted.

  The inside paint apparatus is provided with a chain conveyor 8 including two chains suspended in parallel. The width of the chain conveyor 8 is adjusted according to the size of the raw cover carried into the standby position (not shown) of the inside paint application device, and the raw cover is placed on the chain conveyor 8 and conveyed to the inside paint application area. It is stopped at a position optimal for application of the paint, specifically, at a position where the center of the raw cover T0 is directly above the spray gun 7.

B. Spray Gun Drive Mechanism The spray gun drive mechanism 5 includes a spray gun motor 51, an encoder 52, a drive connection mechanism 53 that connects the spray gun motor 51 and the movable member 54, a guide member 55, and the like. A supply unit 56 provided with a passage such as an inside paint is attached, and the drive coupling mechanism 53 is fixed to the support member 57.

  As described above, the spray gun drive mechanism 5 in the present embodiment employs the spray gun motor 51, and the spray gun motor 51 is driven and controlled in accordance with the movement information sent from the encoder 52. 7 is stopped at the optimum position for applying the inside paint, specifically, the nozzle of the spray gun stops at the center of the width of the raw cover T0. As such a spray gun motor 51, a stepping motor, a pulse motor, a servo motor or the like capable of precise adjustment is preferable.

  The drive coupling mechanism 53 is a part that converts the rotational motion of the spray gun motor 51 into the vertical motion of the spray gun, and is composed of a belt, a gear transmission member, and the like. The spray gun motor 51 is driven to transmit the linear motion in the vertical direction to the movable member 54, and the movable member 54 is guided by the guide member 55 and moved up and down. Further, the movable member 54 is rotated to rotate the spray gun 7 fixed on the upper part thereof, so that the inside paint is applied to the entire inner surface of the raw cover.

  The supply unit 56 is connected to an inside paint supply pipe, an air supply pipe, etc., not shown. The supply unit 56 has a rotary joint or the like so that these supply pipes are not moved up and down and are not rotated.

  In the inside paint coating apparatus of the present embodiment, the stop positions of the low cover and spray gun are not fixed only in two to three stages, but the stop positions of the low cover and spray gun are finely determined according to the size data of the raw cover. It adjusts, and it is comprised so that a raw material can be apply | coated by stopping a raw cover and a spray gun in the optimal position for application | coating of an inside paint.

  In addition, as described above, since the spray gun is moved up and down using the motor-driven lifting device 50, the stop position of the spray gun can be adjusted more finely than in the cylinder driven type.

2. Control Device (1) Configuration of Control Device As described above, in this embodiment, the chain conveyor width, raw cover stop position, spray gun stop position, and the like are set and controlled according to tire size data. Since such control is performed by the control device, the configuration and operation of the control device of the side paint coating apparatus of the present embodiment will be described here. FIG. 3 is a block diagram of a control device that controls the inside paint coating apparatus according to the embodiment of the present invention.

  As shown in FIG. 3, the control device of the present embodiment includes a controller 1 that controls application of inside paint. The controller 1 includes a CPU 11 that is a central processing unit, a memory 12, a calculation unit 13, a conveyor control unit 14, a spray gun control unit 15, a pump control unit 16, and the like.

  The controller 1 has input means 2 for inputting various data such as raw cover information (for example, product number) and predetermined set values for various raw covers in advance as a database, bar code or A sensor that reads raw cover information displayed on the surface of the raw cover by other methods and a detection sensor 3 that detects that the raw cover has passed a predetermined position are connected.

  Further, the conveyor control unit 14 is connected to a conveyor driving mechanism 4 having a conveyor motor 41 for driving the chain conveyor and an encoder 42 for controlling the driving of the conveyor, by adjusting the width of the chain conveyor by moving the two chains in parallel. The spray gun control unit 15 includes a spray gun motor 51 that raises and lowers the spray gun, and an elevator device 50 that is provided with an encoder 52 that controls the drive of the spray gun motor 51. The spray gun drive drives the spray gun. The mechanism 5 is connected, and the pump controller 16 is connected to a pump 6 for discharging the inside paint.

(2) Operation of the control device The CPU 11 of the controller 1 controls the loading and reading of various data such as raw cover information and predetermined set values to the memory 12, the arithmetic unit 13, the conveyor control unit 14, and the spray gun. Control of control parts, such as control part 15 and pump control part 16, is performed.

  The input unit 2 includes a keyboard or the like, and inputs in advance size data such as a distance between a pair of beads (bead-to-bead distance), bead diameter, raw cover outer diameter, and the like for each type of raw cover. These size data and the like are data necessary for stopping the raw cover and spray gun at the optimum application position. These size data and the like are taken into the controller 1 and stored in the memory 12 as a database.

  The arithmetic unit 13 performs various arithmetic processes based on the signal input from the detection sensor 3. First, the product number of the raw cover is identified based on the read raw cover information (raw cover information identifying step). Next, size data such as a distance between a pair of beads of the raw cover corresponding to the identified raw cover information, a bead diameter, an outer diameter of the raw cover, and the like are fetched from a database recorded in the memory 12 (size data fetching step). Next, the captured size data is converted into a chain conveyor width (chain data conversion step). Then, the size data is transmitted to the conveyor control unit 14 and the spray gun control unit 15, and the chain data is transmitted to the conveyor control unit 14.

  The conveyor control unit 14 adjusts the open / close position of the chain conveyor in the application area by motor driving based on the transmitted chain conveyor width (chain conveyor adjustment process). The conveyor controller 14 is connected to a conveyor drive mechanism 4 mounted on the inside paint applicator side, and controls driving and stopping of a conveyor motor 41 provided in the conveyor drive mechanism 4. A passing signal that detects that the low cover being conveyed on the chain conveyor has passed a predetermined position by driving the conveyor motor 41 is transmitted to the conveyor control unit 14. The conveyor drive mechanism 4 is provided with an encoder 42. The encoder 42 sets a low cover stop position based on the calculation result received from the calculation unit 13 (low cover stop position setting step), and the set low cover position is set. Based on the stop position and the passing signal, the stop time of the chain conveyor is determined. The conveyor control unit 14 stops the conveyor motor 41 at a predetermined stop time, and stops the raw cover at a predetermined position (low cover conveyance / stop process).

  The spray gun controller 15 is connected to a spray gun drive mechanism 5 mounted on the inside paint application device side, and drives a spray gun motor 51 of an elevating device 50 provided in the spray gun drive mechanism 5. The lifting device 50 is provided with an encoder 52, and the encoder 52 sets the height position of the spray gun based on the size data received from the calculation unit 13 (spray gun position setting step). The spray gun control unit 15 drives the spray gun motor 51 to raise and lower the spray gun, and stops the spray gun at a predetermined position (spray gun position adjusting step).

  The pump control unit 16 controls ON / OFF of the pump 6 that supplies the inside paint to the spray gun, the discharge amount of the paint, and the like (inside paint application process).

3. Inside Paint Application Procedure In the present embodiment, inside painting is performed for raw covers of various sizes and shapes. First, in order to make this embodiment easier to understand, an example of the size and shape of the raw cover is shown. FIG. 4 is a diagram schematically showing the size and shape of various raw covers, and (a), (b), and (c) are diagrams showing a large size, a medium size, and a small size, respectively. Is a side view, and the middle figure is a plan view. The middle and lower circles indicate the center of the raw cover (the center of the raw cover circle) and the center of the width, respectively.

  FIG. 5 is a diagram illustrating the distance between a pair of beads (bead-to-bead) tread width, outer diameter, and bead diameter for each of two types of raw covers having different shapes when viewed from the side.

  Next, a procedure for applying the inside paint on the low cover using the inside paint applying apparatus including the control device having the above-described configuration will be described with reference to FIGS.

  FIG. 6 is a diagram for explaining an example of raw cover information such as the size and shape of the raw cover, where (a) is a side view of the raw cover and (b) is a plan view. FIG. 7 is a flowchart of a method for applying the inside paint to the inner surface of the raw cover. In FIG. 6, T1, T2, and T3 are tire product numbers (factory product numbers) of (1), (2), and (3), respectively, and are displayed as bar codes, for example, at predetermined positions on the surface of the raw cover.

(1) Identification of Raw Cover Information First, in the raw cover information reading step S0 (FIG. 7), raw cover information displayed by a barcode or the like is read on the surface of the raw cover carried into the standby position of the inside paint apparatus.
(2) Identification of raw cover information In the raw cover information identification step S1, the product number of the tires carried in is identified from the read raw cover information.

(3) Acquisition of Size Data Next, in the size data acquisition step S2, the size data of the identified product number is acquired from the database relating to the size of the raw cover for each product number input in advance. For example, in the case of (1) in FIG. 6, that is, the case of the raw cover of the product number T1, the distance between a pair of upper and lower beads, that is, the distance between the upper and lower Tb1 in FIG. 6A, and the bead diameter, that is, FIG. bD1 in b) and outer diameter of the raw cover, that is, 2 × R1 in FIG. In the following description, the case of the raw cover of the product number T1 in FIG.

(4) Chain data conversion The fetched size data is converted into the chain conveyor width, that is, W1 in FIG. 6A in the chain data conversion step S3. Specifically, the chain conveyor width is converted from the captured bead diameter bD1 and the raw cover outer shape 2 × R1 to the chain conveyor width by a relational expression of chain conveyor width = (bead diameter bD1 + low cover outer shape 2 × R1) / 2. . The chain height Hc is fixed.

(5) Chain conveyor adjustment The chain conveyor width of the chain conveyor 8 (see FIG. 2) is adjusted to the chain data obtained by the chain data conversion by the conveyor drive mechanism (see FIG. 2) in the chain conveyor adjustment step S4. The

(6) Setting of low cover stop position In the low cover stop position setting step S5, a low cover stop position is set based on the read size data. Specifically, in FIG. 6B, the stop position of the low cover is set so that the center C11 of the low cover overlaps the lift position of the spray gun (not shown).

  As described above, in the present embodiment, the product number of the raw cover is identified, and the raw cover stop position is finely set based on the identified raw cover size data.

(7) Raw Cover Transport / Stop In the low cover transport / stop process S6, the raw cover is placed on the chain conveyor 8 from the standby position toward the coating area and transported. At this time, since the width of the chain conveyor is adjusted according to the size of the raw cover, the center of the raw cover can be placed so as to substantially overlap the center of the interval between the two chains. For this reason, even if the size of the raw cover changes, it can be conveyed so that the center of the circular of the raw cover passes through a substantially constant position, that is, the center of the interval between the two chains.

  A sensor such as a photoelectric tube is installed at a predetermined distance from the center of the spray gun, for example, Lmm (not shown) in the transport direction of the raw cover, that is, upstream, and the front end of the raw cover (tip in the transport direction) is Detects passing through the sensor installation position.

  Then, after detecting the passage of the raw cover, based on the predetermined distance Lmm, the conveying speed (Vmm / sec) and the radius of the raw cover, that is, R1 (mm) in FIG. 6, (L (mm) + R1) / V (mm / sec) Later, the conveyance of the raw cover is stopped, and the raw cover is stopped at the raw cover stop position (for example, C11 in FIG. 6B). As described above, since the center of the low cover circle passes through a certain position, the center of the low cover circle is stopped so as to overlap with the fixed position, that is, the lifting position of the spray gun only by setting the position in the conveying direction. be able to.

(9) Spray gun position setting In the spray gun position setting step S7, the height position of the spray gun is set based on the identified raw cover size data. Specifically, the height position of the spray gun is set so that the nozzle height of the spray gun is positioned at the center in the width direction of the raw cover (for example, C1 in FIG. 6A). (S7)

(10) Spray Gun Position Adjustment Next, in the spray gun position adjustment step S8, the spray gun is lifted using the motor-driven lifting device 50 so that the height position of the spray gun becomes the set position. Adjust the position.

  As described above, in the present embodiment, the height position of the spray gun is finely set based on the identified low cover size data and chain data.

(11) Inside paint application, transport after the application is completed And, in the inside paint application step S9, the pump is operated to spray the inside paint on the inner surface of the raw cover, and then the spray gun is lowered in the spray gun lowering step S10. Subsequently, in the raw cover transporting step S11, the raw cover is transported from the application position, and the next raw cover is applied.

  According to the inside paint coating method and the coating apparatus according to the present invention, since the low cover stop position and the vertical position of the spray gun are finely set based on the raw cover information, coating unevenness and coating can be applied to a wide variety of raw covers. The inside paint can be applied without causing defects. As a result, it is possible to reduce the man-hours required for occurrence and repair of defects such as heavy defects and light defects. In addition, the consumption of auxiliary consumables such as bladders and inside paint can be reduced. Further, since the position is adjusted by moving the spray gun up and down by a motor-driven lifting device, the position can be finely adjusted. As a result, it is possible to perform satisfactory coating with no coating unevenness. Further, energy consumption can be saved as compared with the conventional cylinder drive type.

DESCRIPTION OF SYMBOLS 1 Controller 2 Input means 3 Detection sensor 4 Conveyor drive mechanism 5 Spray gun drive mechanism 6 Pump 7, 101 Spray gun 8, 113 Chain conveyor 11 CPU
DESCRIPTION OF SYMBOLS 12 Memory 13 Calculation part 14 Conveyor control part 15 Spray gun control part 16 Pump control part 21 Belt conveyor 41 Conveyor motor 42, 52 Encoder 50, 102 Lifting device 51 Spray gun motor 53 Drive connection mechanism 54 Movable member 55 Guide member 56 Supply part 57 Support member 103 Rotating part 104 Connecting part 111 Large size low cover 112 Small size low cover 113 Chain 160 Barcodes bD1, bD2, bD3 Bead diameters C1, C2, C3 Spray gun stop positions C11, C21, C31 Conveyor stop position h1 , H2, h3 Spray gun height Hc Chain height R1, R2, R3 Low cover outer diameter / 2
T0 Rocover T1, T2, T3 Low cover part number Tb1 Bead

Claims (3)

An inside paint application method for applying inside paint by an inside paint apparatus provided with a spray gun capable of adjusting the position in the vertical direction on the inner surface of the raw cover conveyed in the horizontal direction while being laid down by the chain conveyor,
A raw cover information identifying step for identifying raw cover information identifying the size and shape of the raw cover carried into the standby position of the inside paint device;
A size for fetching size data relating to a distance between a pair of beads corresponding to the raw cover information identified by the raw cover information identification step, a bead diameter, and an outer diameter of the raw cover from size data for each raw cover information of various raw covers stored in advance Data capture process;
A chain data conversion step of converting the size data acquired by the size data acquisition step into chain data of the chain conveyor width of the chain conveyor;
A chain conveyor adjustment step of adjusting the chain conveyor width of the inside paint device based on the chain data obtained by the chain data conversion step;
A raw cover stop position setting step for setting a raw cover stop position based on the size data;
A raw cover transporting / stopping process for transporting the raw cover to the inside paint application area and stopping the raw cover at the raw cover stop position set by the raw cover stop position setting process;
A spray gun position setting step of setting a height position of the spray gun based on the size data;
A spray gun position adjusting step of adjusting the position of the spray gun to the spray gun height position set by the spray gun position setting step;
An inside paint application method comprising: an inside paint application step of discharging inside paint from the spray gun whose position has been adjusted by the spray gun position adjustment step and applying the inside paint to an inner surface of a raw cover. An inside paint coating apparatus including a chain conveyor that transports a raw cover in a horizontal state in a horizontal state, a spray gun, and a lifting device that lifts and lowers the spray gun vertically.
Raw cover information identifying means for identifying raw cover information identifying the size and shape of the raw cover carried into the standby position of the inside paint device;
A size for fetching size data relating to a distance between a pair of beads corresponding to the raw cover information identified by the raw cover information identifying means, a bead diameter, and an outer diameter of the raw cover from size data for each raw cover information of various raw covers stored in advance Data capture means;
Chain data conversion means for converting the size data acquired by the size data acquisition means into chain data of the chain conveyor width of the chain conveyor;
Chain conveyor adjusting means for adjusting the chain conveyor width of the inside paint device based on the chain data obtained by the chain data converting means;
Raw cover stop position setting means for setting a raw cover stop position based on the size data;
A raw cover transporting / stopping means for transporting the raw cover to the inside paint application area and stopping the raw cover at the raw cover stop position set by the raw cover stop position setting means;
Spray gun position setting means for setting the height position of the spray gun based on the size data;
Spray gun position adjusting means for adjusting the position of the spray gun to the spray gun height position set by the spray gun position setting means;
An inside paint coating apparatus comprising: an inside paint coating unit that discharges an inside paint from the spray gun whose position is adjusted by the spray gun position adjusting unit and applies the inside paint to an inner surface of a raw cover.   The inside paint coating apparatus according to claim 2, wherein the lifting device is motor-driven.

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