Coating device

Abstract

To provide a coating device that enables any worker to easily position a backup roll and a die.SOLUTION: A coating device comprises: a backup roll 12 that conveys a web W in a longitudinal direction while holding the web; a die 14 arrange below the backup roll 12; a pedestal 20 arranged below the die 14; a pair of left and right arm parts 34 supporting the die 14 from both left and right sides, arranged to be movable in the longitudinal direction with respect to the pedestal 20; and a pair of left and right centering jigs 60 and 60, which moves the pair of left and right arm parts 34 and 34 in the longitudinal direction so that a shortest distance from a zero point of a dial gauge 80 of the left centering jig 60 to an outer peripheral surface of the backup roll 12 is equal to a shortest distance from a zero point of a dial gauge 80 of the right centering jig 60 to the outer peripheral surface of the backup roll 12.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a coating device for coating a web with a coating liquid.

Background Art

[0002] Conventionally, a die is installed below a backup roll, and a coating liquid is discharged from a slit-shaped discharge port at the upper end of the die, and the coating liquid is applied to a web that is held and conveyed around the lower circumferential surface of the backup roll. A coating device has been proposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the coating device as described above, if the die is not positioned (centered) so that the left-right direction of the die is parallel to the rotation axis of the backup roll before applying the coating liquid to the web, the coating position of the coating liquid applied to the web will shift obliquely.

[0005] Therefore, an operator manually positioned the backup roll and the die, but there was a problem that since delicate adjustment was required, the accuracy and adjustment time varied greatly depending on the skill level of the operator.

[0006] Therefore, in view of the above problems, an object of the present invention is to provide a coating device that allows any operator to easily position the backup roll and the die.

Means for Solving the Problems

[0007] The present invention includes a backup roll that holds a web and conveys it in the front-rear direction, a die disposed below the backup roll for applying a coating liquid to the web, a pedestal disposed below the die, a pair of left and right arm portions provided on the upper surface of the pedestal for supporting the die from both left and right sides and movably arranged in the front-rear direction with respect to the pedestal, and a pair of left and right centering jigs. The left centering jig has a left jig body detachably provided on the front surface or the left side of the rear surface of the die, and left measuring means disposed in front of or behind the outer peripheral surface of the backup roll and provided at the upper end portion of the left jig body. The right centering jig has a right jig body detachably provided on the front surface or the right side of the rear surface of the die, and right measuring means disposed in front of or behind the outer peripheral surface of the backup roll and provided at the upper end portion of the right jig body. The left measuring means can measure the left shortest distance from the left measuring means to the outer peripheral surface of the backup roll, and the right measuring means can measure the right shortest distance from the right measuring means to the outer peripheral surface of the backup roll. The coating apparatus is characterized by this.

Effect of the Invention

[0008] According to the present invention, the left shortest distance from the left measuring means in the pair of left and right centering jigs to the outer peripheral surface of the backup roll and the right shortest distance from the right measuring means to the outer peripheral surface of the backup roll are measured, and the positions of the pair of left and right arm portions are moved in the front-rear direction so that these shortest distances are the same, thereby adjusting the position of the die. As a result, it is possible to easily position the die so that the left-right direction of the die and the rotation axis of the backup roll are parallel.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0010] Hereinafter, a coating apparatus 10 for a web W according to an embodiment of the present invention will be described with reference to the drawings. Embodiment 1

[0011] The coating apparatus 10 for the web W according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 7. The coating apparatus 10 of the present embodiment applies only one layer of a coating liquid to a long web W such as a film, a metal foil, a mesh-shaped metal, paper, or a fabric. In this description, the left side means the left side when the coating apparatus 10 is viewed from the front to the rear as shown in FIG. 1.

[0012] (1) Configuration of the coating apparatus 10 The configuration of the coating apparatus 10 will be described with reference to FIGS. 1 to 7. The coating apparatus 10 is provided with a backup roll 12, a die 14, and a pedestal 20 in order from above on a frame (not shown).

[0013] As shown in FIGS. 1 and 2, the metal backup roll 12 has a pair of left and right rotating shafts 13, 13 protruding from both the left and right sides, and the pair of left and right rotating shafts 13, 13 are rotatably and horizontally supported at the uppermost stage of a frame (not shown). As shown in FIG. 4, the backup roll 12 rotates in the counterclockwise direction about the center O (rotating shaft 13), and holds the web W with its lower peripheral surface and conveys it in the front-rear direction (from left to right in FIG. 4, that is, from upstream to downstream). A motor for rotating the backup roll 12 at a constant rotational speed is connected to one of the rotating shafts 13 of the backup roll 12.

[0014] As shown in Fig. 4, the die 14 is made of metal and is provided below the backup roll 12, and has a first main body 16 and a second main body 18. The first main body 16 is a rectangular parallelepiped extending in the left - right direction, and a first inclined surface 22 that slopes downward from the upper end of the rear surface to the upper end of the front surface is formed, and the upper part has a triangular longitudinal section. The rear surface of the first main body 16 is vertical, and a liquid reservoir portion 24 is formed in the left - right direction. At the tip of the upper part of the first main body 16, a first coating blade portion extending in the left - right direction and having a flat upper surface is formed.

[0015] The second main body 18 is arranged on the rear surface of the first main body 16, and is a rectangular parallelepiped extending in the left - right direction. A second inclined surface 26 that slopes downward from the upper end of the front surface to the upper end of the rear surface is formed, and the upper part has a triangular longitudinal section. At the tip of the upper part of the second main body 18, a second coating blade portion extending in the left - right direction and having a flat upper surface is formed.

[0016] As shown in Figs. 4 and 5, a plate - shaped shim 28 is sandwiched between the rear surface of the first main body 16 and the front surface of the second main body 18. As shown in Fig. 5, the first main body 16, the second main body 18, and the shim 28 outside the liquid reservoir portion 24 are integrally fixed by a plurality of fastening bolts 96 passing through the fastening screw holes 94. When these members are integrally fixed, the first inclined surface 22 and the second inclined surface 26 as a whole form a triangular longitudinal section when viewed from the side, the upper surfaces of the first coating blade portion and the second coating blade portion are at the same height, and the lower circumferential surface of the backup roll 12 is located with a coating interval above them.

[0017] As shown in FIG. 4, above the liquid reservoir portion 24 and between the first main body 16 and the second main body 18, a liquid passage 21 extending from the upper end portion of the liquid reservoir portion 24 is vertically formed, and at the upper end portion of the liquid passage 21, a discharge port 23 in a slit shape in the left - right direction is formed. The slit - shaped discharge port 23 is located between the first coating blade portion and the second coating blade portion. The left and right both side portions of the liquid passage 21 are blocked by the left and right both sides of the shim 28. As shown in FIGS. 1, 2, and 4, at the center in the left - right direction on the front surface of the liquid reservoir portion 24 provided in the first main body 16, a supply port 25 for the coating liquid penetrates, and the coating liquid is supplied to this supply port 25 from a pump (not shown).

[0018] As shown in FIGS. 1 and 2, on the left and right both side portions of the first main body 16, a pair of left - right shaft fixing portions 32, 32 for horizontally protruding a pair of left - right rotating shafts 30, 30 are respectively provided.

[0019] As shown in FIGS. 1, 2, and 4, the pedestal 20 is a rectangular parallelepiped long in the left - right direction and is horizontally installed at the lowermost stage of a frame (not shown). On the left and right both side portions on the upper surface of the pedestal 20, a pair of left - right arm portions 34, 34 are provided. As shown in FIGS. 1, 2, 4 to 7, the pair of left - right arm portions 34, 34 respectively have a pair of left - right arm support bases 36, 36 completely fixed to the upper surface of the pedestal 20, and a pair of left - right arm main bodies 38 are movably provided in the front - rear direction on the upper surfaces of the pair of left - right arm support bases 36. As shown in FIG. 7, a pair of left - right rotating shafts 30, 30 protruding from the die 14 are rotatably fitted to the pair of left - right arm main bodies 38, 38. Long holes 40 and 42 penetrate vertically through a front leg portion 38a and a rear leg portion 38b protruding in the front - rear direction from the lower portion of the arm main body 38, respectively. The long holes 40 and 42 are holes long in the front - rear direction. Bolts 44 and 46 respectively inserted into the long holes 40 and 42 from above the arm main body 38 are screwed into the arm support base 36.

[0020] As shown in Fig. 7, the positioning base 48 protrudes from the rear end of the arm support base 36, and the positioning base 48 is located behind the arm main body 38. An adjustment bolt 50 penetrates the positioning base 48 in the front-rear direction. The rear (head) side of the adjustment bolt 50 protrudes from the rear surface of the positioning base 48, and the front end of the adjustment bolt 50 protrudes from the front surface of the positioning base 48 and abuts against the rear surface of the arm main body 38. Thus, by loosening the bolts 44 and 46 and rotating the adjustment bolt 50 in the positioning base 48, the front end of the adjustment bolt 50 presses the arm main body 38, the bolt 44 moves by the amount of the gap in the long hole 40, the bolt 46 moves by the amount of the gap in the long hole 42, and the position of the arm main body 38 in the front-rear direction can be adjusted. After the adjustment is completed, by fastening the bolts 44 and 46, the arm main body 38 can be completely fixed to the arm support base 36. Then, by adjusting the positions of the pair of left and right arm main bodies 38, 38 in the front-rear direction respectively, the inclination of the die 14 in the left-right direction can be adjusted.

[0021] (2) Centering jig 60 Next, the centering jig 60 will be described with reference to Fig. 3. Fig. 3 is a perspective view of the left centering jig 60. The jig body of the centering jig 60 has a fixing portion 62, a gripping portion 64, and a protruding portion 78.

[0022] As shown in Fig. 3, the fixing portion 62 is a vertically long rectangular parallelepiped, and annular gripping portions 64 are provided forward from the upper and lower ends of the fixing portion 62. More specifically, the gripping portion 64 is composed of an upper portion 66 of a rectangular parallelepiped extending obliquely upward from the upper end of the rectangular parallelepiped fixing portion 62, a lower portion 68 horizontally extending forward from the lower end of the rectangular parallelepiped fixing portion 62, and a vertical gripping portion 70 connecting the upper portion 66 and the lower portion 68. Also, a hand can be inserted into the space 72 surrounded by the annular gripping portion 64 and the fixing portion 62.

[0023] As shown in Fig. 3, a support piece 74 protrudes rearward from the lower end of the rear surface of the fixing portion 62. A fixing bolt 76 penetrates the support piece 74 in the vertical direction. As shown in Fig. 3, two screw holes 88 and four screw holes 90 penetrate the fixing portion 62 in the vertical direction to fix the centering jig 60 to the die 14. Further, a recess 92 is provided in the gripping portion 70 at a position corresponding to the screw hole 88. The reason for providing the recess 92 is to prevent the gripping portion 70 from getting in the way when fastening a fastening bolt to the screw hole 88. Details of the screw hole 88 will be described in Embodiment 2.

[0024] As shown in Fig. 3, a rectangular parallelepiped protruding portion 78 protrudes upward from the upper end of the gripping portion 64, that is, the position where the upper portion 66 and the gripping portion 70 are joined. A gauge support portion 82 formed by bending a metal plate is provided in the front-rear direction at the upper end of the protruding portion 78, and a dial gauge 80 is horizontally arranged inside the gauge support portion 82. A "dial gauge" is a measuring instrument for accurately measuring a short straight-line distance. The analog type shown in Fig. 3 converts the linear motion of a spindle with a measuring head into a rotational motion by a gear (rack and pinion), further magnifies it using a gear, and represents the magnitude of the motion with a scale and a pointer. A measurement range of 0 - 10 mm and a graduation of 1 / 100 mm are common. There are also products with a graduation of 1 / 1000 mm. The digital type reads the linear motion of a spindle with a measuring head using an encoder and displays the value read by the encoder on a liquid crystal or a display. Further, a hole 86 through which the measuring head 84 of the dial gauge 80 protrudes horizontally penetrates in the front-rear direction and horizontally at the upper end of the protruding portion 78.

[0025] Note that, as shown in Fig. 5, the size of the centering jig 60 is designed in advance so that the measuring head 84 of the dial gauge 80 coincides with the center O of the backup roll 12 when the centering jig 60 is fixed to the front surface of the die 14.

[0026] The centering jig 60 on the right side also has the same configuration as the centering jig 60 on the left side. The difference is that the recessed portion 92 of the gripping portion 70 and the positions of the screw holes 88 and 90 are provided symmetrically left and right.

[0027] (3) Positioning method by centering jigs 60, 60 Next, a positioning method for the backup roll 12 and the die 14 using a pair of left and right centering jigs 60, 60 will be described.

[0028] First, the operator adjusts the zero points of the dial gauges 80, 80 of the pair of left and right centering jigs 60, 60.

[0029] Next, as shown in FIG. 5, the operator slightly loosens the two fastening bolts 96 on the left side that penetrate through the first main body 16, the shim 28, and the second main body 18 of the die 14.

[0030] Next, as shown in FIG. 5, the operator aligns the fastening screw hole 94 on the left side with the screw hole 90 of the centering jig 60 on the left side, and tightens the fastening bolt 96 again to fix the centering jig 60 on the left side to the left side of the front surface of the die 14.

[0031] Next, as shown in FIGS. 3 and 5, the operator tightens the fixing bolt 76 of the support piece 74 at the lower end of the centering jig 60 on the left side to completely fix the centering jig 60 to the lower surface of the first main body 16. By doing so, by fixing the centering jig 60 on the left side to the left side of the front surface of the die 14, as shown in FIG. 5, the measuring element 84 of the dial gauge 80 of the centering jig 60 on the left side matches the height on the left side of the center O of the backup roll 12.

[0032] Next, as shown in FIGS. 1 and 2, the operator also fixes the centering jig 60 on the right side to the right side of the front surface of the die 14 in the same manner. The measuring element 84 of the dial gauge 80 of the centering jig 60 on the right side also matches the height on the right side of the center O of the backup roll 12.

[0033] Next, the operator brings the measuring elements 84, 84 of the pair of left and right dial gauges 80, 80 into contact with the outer peripheral surface of the backup roll 12 respectively. Then, the left dial gauge 80 displays the shortest left distance from the zero point of the dial gauge 80 to the outer peripheral surface of the backup roll 12, and the right dial gauge 80 displays the shortest right distance from the zero point of the dial gauge 80 to the right outer peripheral surface of the backup roll 12. When the shortest distances on both the left and right sides are the same, the left - right direction of the center O of the backup roll 12 is parallel to the left - right direction of the discharge port 23 of the die 14.

[0034] However, when the shortest distances on both the left and right sides do not match, it is necessary to adjust the inclination of the die 14 with respect to both the left and right sides. Therefore, the operator loosens the bolts 44 and 46 with respect to one of the pair of left and right arm parts 34, and adjusts the position of the arm body 38 in the front - rear direction with the adjustment bolt 50. Then, the adjustment is made so that the shortest distances of the pair of left and right are the same. In this case, only one of the arm bodies 38 may be adjusted, or the arm bodies 38, 38 on both the left and right sides may be finely adjusted respectively. As a result, as shown in FIG. 4, the left - right direction of the discharge port 23 of the die 14 and the left - right direction of the center O of the backup roll 12 will coincide, and the operator can easily perform the positioning.

[0035] Finally, after the positioning is completed, the operator loosens the fastening bolts 96 and removes the pair of left and right centering jigs 60, 60 from the die 14 respectively.

[0036] (4) Effect According to this embodiment, the operator can perform the positioning by simply attaching the pair of left and right centering jigs 60, 60 to the front surface of the die 14 and moving the arm bodies 38, 38 of the pair of left and right arm parts 34, 34 in the front - rear direction so that the shortest distances measured by the pair of left and right dial gauges 80, 80 match. Therefore, the operator can easily perform the positioning regardless of their proficiency level.

[0037] In addition, when the operator holds the centering jig 60, the operator may simply hold the gripping portion 70 of the handle portion 64 by hand. In particular, since the recessed portion 92 where the gripping portion 70 becomes thinner is provided, it is easier to hold the gripping portion 70 at this recessed portion 92. Embodiment 2

[0038] The coating device 10 for the web W according to Embodiment 2 of the present invention will be described with reference to FIG. 8. In Embodiment 1, the die 14 coated only one layer of the coating liquid on the web W, but in this embodiment, instead of this, as shown in FIG. 8, a die 100 for lamination capable of coating two layers of the first coating liquid and the second coating liquid at once will be described. Note that the configurations of the backup roll 12, the pedestal 20, and the pair of left and right centering jigs 60, 60 are the same as those in Embodiment 1, and thus the description thereof will be omitted.

[0039] (1) Die 100 The configuration of the die 100 will be described with reference to FIG. 8. As shown in FIG. 8, the die 100 includes an intermediate main body 102 extending in the left-right direction and formed in a triangular longitudinal cross section, a first main body 104 attached to the front surface of the intermediate main body 102, and a second main body 106 attached to the rear surface of the intermediate main body 102. The intermediate main body 102 and the first main body 104 are fixed by a plurality of fastening bolts 120 screwed into a plurality of fastening screw holes 122 provided in the intermediate main body 102 and the first main body 104, and the intermediate main body 102 and the second main body 106 are fixed by a plurality of fastening bolts (not shown).

[0040] As shown in FIG. 8, a first liquid reservoir portion 108 for storing the first coating liquid is formed on the rear surface of the first main body 104. A first liquid passage 112 is provided upward from the first liquid reservoir portion 108. At the upper end of the intermediate main body 102 and the upper end of the first main body 104, a first discharge port 116 for discharging the first coating liquid flowing from the first liquid passage 112 is provided. A second liquid reservoir portion 110 for storing the second coating liquid is formed on the front surface of the second main body 106. A second liquid passage 114 is provided upward from the second liquid reservoir portion 110. At the upper end of the intermediate main body 102 and the upper end of the second main body 106, a second discharge port 118 for discharging the second coating liquid flowing from the second liquid passage 114 is provided.

[0041] (2) Coating device 10 adjustment method The positioning method between the backup roll 12 and the die 100 will be described using a pair of left and right centering jigs 60, 60.

[0042] Fix a pair of left and right centering jigs 60, 60 on both the left and right sides of the front surface of the die 100. In this case, it is different from that in Embodiment 1 as follows.

[0043] First, the operator removes two fastening bolts 120 on the left side of the die 100 from the intermediate body 102 and the first body 104 among a plurality of fastening bolts 120.

[0044] Next, the operator abuts the fixing portion 62 of the left centering jig 60 against the left side of the front surface of the die 100, and aligns the left fastening screw hole 122 and the screw hole 88 of the left centering jig 60.

[0045] Next, the operator inserts two fastening bolts 120 from the front into the two screw holes 88 of the fixing portion 62 respectively to integrally fix the fixing portion 62, the first body 104, and the intermediate body 102. In this case, a recessed portion 92 is provided in the gripping portion 70 so as not to interfere with the fastening operation of the two fastening bolts 120.

[0046] Next, the operator tightens the fixing bolt 76 of the support piece 74 at the lower end of the left centering jig 60 to completely fix the centering jig 60 to the first body 16.

[0047] Next, the operator similarly fixes the right centering jig 60 on the right side of the front surface of the die 100.

[0048] Next, the operator brings the measuring elements 84, 84 of the pair of left and right dial gauges 80, 80 into contact with the outer peripheral surface of the backup roll 12 respectively. Then, the left dial gauge 80 displays the shortest left distance from the zero point of the dial gauge 80 to the outer peripheral surface of the backup roll 12, and the right dial gauge 80 displays the shortest right distance from the zero point of the dial gauge 80 to the right outer peripheral surface of the backup roll 12.

[0049] Next, when the shortest distances on both the left and right sides do not match, it is necessary to adjust the inclination of the die 14 with respect to both the left and right sides. Therefore, the operator loosens the bolts 44 and 46 with respect to one of the pair of left and right arm portions 34, 34, adjusts the position of the arm body 38 in the front-rear direction with the adjustment bolt 50, and makes the shortest distances on both the left and right sides match.

[0050] Finally, after the positioning is completed, the operator removes the fastening bolt 120, removes the pair of left and right centering jigs 60, 60 from the die 14 respectively, and then fastens the fastening bolt 120 again.

[0051] (3) Effect Also in the die 100 of the present embodiment, similar to the die 14 of the first embodiment, the operator can attach the pair of left and right centering jigs 60, 60 to the front surface of the die 14 and perform positioning by moving the arm bodies 38, 38 of the pair of left and right arm portions 34, 34 in the front-rear direction so that the shortest distances measured by the pair of left and right dial gauges 80, 80 match. Therefore, the operator can easily perform the positioning regardless of their proficiency level. Modification example

[0052] In the above-described first and second embodiments, the pair of left and right centering jigs 60, 60 are provided on both the left and right sides of the front surface of the die 14 and the die 100. However, the present invention is not limited to this, and they may be provided on both the left and right sides of the rear surface of the die 14 and the die 100.

[0053] In the above-described first embodiment, the liquid reservoir portion 24 is provided on the rear surface of the first main body 16. However, it may be provided on the front surface of the second main body 18.

[0054] Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

Explanation of Reference Numerals

[0055] 10... Coating device, 12... Backup roll, 14... Die, 16... First main body, 18... Second main body, 20... Pedestal, 34... Arm part, 60... Centering jig, 62... Fixing part, 64... Handle part, 70... Gripping part, 78... Protrusion, 80... Dial gauge, 84... Measuring element

Claims

1. A backup roll that holds a web and conveys it in the front-rear direction, A die disposed below the backup roll for applying a coating liquid to the web, A pedestal disposed below the die, A pair of left and right arm portions provided on the upper surface of the pedestal, supporting the die from both the left and right sides, and movably arranged in the front-rear direction with respect to the pedestal, A pair of centering jigs on the left and right, having, The centering jig on the left side, A left jig body detachably provided on the left side of the front surface or the rear surface of the die, Arranged in front of or behind the outer peripheral surface of the backup roll, and left measuring means provided at the upper end of the left jig body, having, The centering jig on the right side, A right jig body detachably provided on the right side of the front surface or the rear surface of the die, Arranged in front of or behind the outer peripheral surface of the backup roll, and right measuring means provided at the upper end of the right jig body, having, The left measuring means can measure the shortest left distance from the left measuring means to the outer peripheral surface of the backup roll, The right measuring means can measure the shortest right distance from the right measuring means to the outer peripheral surface of the backup roll, A coating device characterized by this.

2. The left measuring means and the right measuring means are dial gauges, The coating device according to Claim 1.

3. The left measuring means and the right measuring means are provided at the same height as the rotation axis of the backup roll, The coating device according to Claim 1.

4. The left jig body, A rectangular parallelepiped left fixing portion detachably fixed to the left side of the front surface or the rear surface of the die by a left bolt, A left handle portion provided on the left fixing portion, A left protruding portion protruding upward from the left handle portion, having, and the left measuring means is provided at the upper end of the left protruding portion, The right jig body, A rectangular parallelepiped right fixing portion detachably fixed to the right side of the front surface or the rear surface of the die by a right bolt, A right handle portion provided on the right fixing portion, A right protruding portion protruding upward from the right handle portion, having, and the right measuring means is provided at the upper end of the right protruding portion, The coating device according to Claim 1.

5. The die, A first main body, A second main body arranged on the rear surface of the first main body, A liquid reservoir portion provided on the first main body or the second main body for storing the coating liquid, A liquid passage of the coating liquid extending from the liquid reservoir portion between the first main body and the second main body, A discharge port provided at the upper end of the liquid passage for discharging the coating liquid, The coating apparatus according to claim 4, having the above.

6. The left bolt for fixing the left jig body to the die penetrates the first main body and the second main body on the left side of the liquid reservoir, The right bolt for fixing the right jig body to the die penetrates the first main body and the second main body on the right side of the liquid reservoir, The coating apparatus according to claim 5.

7. The die is, An intermediate main body having a triangular longitudinal section extending in the left-right direction, A first main body disposed on the front surface of the intermediate main body, A second main body disposed on the rear surface of the intermediate main body, A first liquid reservoir provided in the first main body for storing the coating liquid, A first liquid passage of the coating liquid extending from the first liquid reservoir between the first main body and the intermediate main body, A first discharge port provided at the upper end of the first liquid passage for discharging the coating liquid, A second liquid reservoir provided in the second main body for storing the coating liquid, A second liquid passage of the coating liquid extending from the second liquid reservoir between the second main body and the intermediate main body, A second discharge port provided at the upper end of the second liquid passage for discharging the coating liquid, The coating apparatus according to claim 4, having the above.

8. A backup roll for holding the web and conveying it in the front-rear direction, A die disposed below the backup roll for applying a coating liquid to the web, A pedestal disposed below the die, A pair of left and right arm portions provided on the upper surface of the pedestal for supporting the die from both the left and right sides and movably arranged in the front-rear direction with respect to the pedestal, A pair of centering jigs, Having, The centering jig on the left side is, A left jig body detachably provided on the front or rear left side of the die, Left measuring means disposed in front of or behind the outer peripheral surface of the backup roll and provided at the upper end portion of the left jig body, Having, The centering jig on the right side is, A right jig body detachably provided on the front or rear right side of the die, Right measuring means disposed in front of or behind the outer peripheral surface of the backup roll and provided at the upper end portion of the right jig body, A method for adjusting a coating apparatus having the above, At least one of the pair of left and right arm portions is moved in the front-rear direction so that the left shortest distance from the left measuring means to the outer peripheral surface of the backup roll is the same as the right shortest distance from the right measuring means to the outer peripheral surface of the backup roll, A method for adjusting a coating apparatus, characterized by the above.

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