Valve and intermittent coating device using the same

Abstract

To provide a valve which uses a voice coil motor and enables opening / closing of the valve at high speed, and to provide an intermittent paint device using the valve.SOLUTION: A first voice coil motor 7 causes a first valve 1 of a three-way valve 10 to operate and includes: a cylindrical outer yoke 42; a ring shaped magnet 44 provided on an inner peripheral surface of the outer yoke 42; a coil bobbin 48 disposed at the inner periphery side of the magnet 44; a first slide shaft 30 coaxially fixed to the coil bobbin 48; an aluminum coil 50 wound around the coil bobbin 48; wiring 53 disposed at the outer yoke 42; and two cables 56, 57 which connect an end of the wiring 53 to the coil 50.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a valve and an intermittent coating apparatus using the same.

Background Art

[0002] Conventionally, an intermittent coating apparatus has been proposed for intermittently coating a coating liquid on a long web such as a metal foil, a film, a fabric, paper, or a metal mesh. This intermittent coating apparatus is provided with a valve composed of a three-way valve between a pump for pumping the coating liquid and a die in order to alternately form an uncoated section and a coated section on the web that is held and conveyed by a backup roll. When forming a coated section on the web, the first valve of this three-way valve is opened to supply the coating liquid to the die, and the second valve is closed. Next, when forming an uncoated section on the web, the first valve of the three-way valve is closed, and the second valve is opened so that the coating liquid circulates to the tank.

[0003] When intermittently coating a coating liquid on a metal foil used for an electrode member of a recent lithium-ion battery or the like, high accuracy is required for the length of the coated section and the length of the uncoated section. Therefore, the applicant has previously proposed an intermittent coating apparatus that performs intermittent coating by using a valve that opens and closes with a voice coil motor.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, even in the case of intermittent coating with a valve using a voice coil motor as described above, a problem has arisen that it is necessary to open and close the valve at a higher speed.

[0006] Therefore, the present invention aims to provide a valve that uses a voice coil motor and can open and close the valve at a faster speed, and an intermittent coating device using the same. [Means for solving the problem]

[0007] The present invention comprises a valve body, a movable coil type voice coil motor, a sliding shaft protruding from the voice coil motor and sliding by the voice coil motor, a space through which liquid flows provided inside the valve body, a liquid inlet provided in the valve body, a liquid outlet provided in the valve body, a valve seat provided at the outlet, a valve element that opens and closes the valve seat, and a sliding shaft disposed within the space, with one end connected to the sliding shaft and the other end to which the valve element is provided, wherein the voice coil motor has a cylindrical outer yoke, and is coaxially provided with a gap on the inner circumference of the outer yoke, and the sliding shaft protrudes from it. The device comprises an inner yoke fixed to the outer yoke on the axial side opposite to the axial side of the outer yoke, a ring-shaped magnet provided on the inner circumferential surface of the outer yoke, a coil bobbin disposed on the inner circumferential side of the magnet and on the outer circumferential side of the inner yoke, a sliding shaft disposed on the inner circumferential side of the inner yoke and fixed coaxially with the coil bobbin, an aluminum coil wound around the coil bobbin, wiring arranged on the outer yoke, and two cables connecting the ends of the wiring to the coil, the two cables extending from the same area on the inner circumferential surface of the outer yoke Through the through hole of the ring-shaped magnet,Each cable extends toward the coil bobbin, with one cable connected to the coil at the outer circumference of the coil bobbin at a position 90° away from the line connecting the axis of the coil bobbin and the same range, and the other cable connected to the coil at the outer circumference of the coil bobbin at a position -90° away from the line connecting the axis of the coil bobbin and the same range, and the positions where the two cables and the coils are connected are the same distance from the opposite axial surface of the outer yoke, and the two cables are provided to be longer than the shortest distance between the end of the wiring and the connection position of the coil so that the coil bobbin can slide relative to the outer yoke along the axial direction of the sliding shaft. With respect to the through-hole of the ring-shaped magnet, the planar shape with the axial direction as the normal direction is an arc shape that is wider than the same range, and the same range is located on the outer yoke on the outer circumference side of the center of the through-hole. This valve is characterized by the following features. [Effects of the Invention]

[0008] According to the present invention, the coil wound around the coil bobbin, which is the movable part of the voice coil motor, is made of aluminum, making it lighter than copper wire. Therefore, when the coil bobbin is slid by magnetic force, the coil bobbin and the sliding shaft can be slid at a higher speed. Consequently, the valve body on the sliding shaft connected to the sliding shaft opens and closes at a higher speed. [Brief explanation of the drawing]

[0009] [Figure 1] This is an explanatory diagram of an intermittent coating apparatus showing one embodiment of the present invention. [Figure 2] This is a partially missing cross-sectional view of a three-way valve. [Figure 3] This is a longitudinal cross-sectional view of the connection between the first valve body and the first VC motor in the first valve of a three-way valve. [Figure 4] This is a longitudinal cross-sectional view of the first VC motor. [Figure 5] This is a cross-sectional view along line AA in Figure 4. [Modes for carrying out the invention]

[0010] The intermittent coating device 100 of an embodiment of the present invention and the three-way valve 10 used therein will be described with reference to FIGS. 1 to 5.

[0011] (1) Structure of the three-way valve 10 First, the three-way valve 10 used in the intermittent coating device 100 will be described with reference to FIG. 2.

[0012] The three-way valve 10 is a combination of a first valve 1 and a second valve 2. The first valve body 3 of the first valve 1 and the second valve body 4 of the second valve 2 are arranged side by side horizontally and combined integrally to form a combined valve body 12. Inside the combined valve body 12, a common space 20 is formed horizontally.

[0013] An inlet 14 for the coating liquid is opened at the side of the first valve body 3 in the combined valve body 12.

[0014] The upper part of the first valve body 3 in the combined valve body 12 protrudes in a cylindrical shape, and a first outlet 16 is opened at the upper end thereof.

[0015] The upper part of the second valve body 4 in the combined valve body 12 protrudes in a cylindrical shape, and a second outlet 18 is opened at the upper end thereof.

[0016] The common space 20 connects the inlet 14 for the coating liquid, the first outlet 16, and the second outlet 18. Inside this space 20, at the base of the first outlet 16, a first valve seat 22 made of rubber or silicon is formed, and at the base of the second outlet 18, a second valve seat 24 made of rubber or silicon is formed.

[0017] A first valve body 26 for opening and closing the first valve seat 22 is arranged inside the base of the first outlet 16. A second valve body 28 for opening and closing the second valve seat 24 is arranged inside the base of the second outlet 18.

[0018] At the lower part of the first valve body 3 in the combined valve body 12, a cylindrical first connecting body 5 is provided, and at the lower part of the first connecting body 5, a first voice coil motor (hereinafter referred to as "first VC motor") 7, which is a direct-acting linear motor, is provided.

[0019] A first sliding shaft 34 that protrudes vertically upward from the first connecting body 5 into the space 20 of the first valve body 3 has a first valve body 26 attached to its upper end. When the first sliding shaft 34 slides, the first valve body 26 opens and closes the first valve seat 22. The lower end of the first sliding shaft 34 is connected via a connecting member 54 to the upper end of a first sliding shaft 30 that protrudes from the first VC motor 7. A first position sensor 38 is attached to the first sliding shaft 30 that protrudes downward from the lower part of the first VC motor 7. This first position sensor 38 is composed of a linear scale and detects the position of the first sliding shaft 30 in units of 1 μm.

[0020] At the lower part of the second valve body 4 in the combined valve body 12, a cylindrical second connecting body 6 is provided, and at the lower part of the second connecting body 6, a second voice coil motor (hereinafter referred to as "second VC motor") 8, which is a direct-acting linear motor, is provided.

[0021] A second sliding shaft 36 that protrudes vertically upward from the second connecting body 6 into the space 20 of the second valve body 4 has a second valve body 28 attached to its upper end. When the second sliding shaft 36 moves up and down and slides, the second valve body 28 opens and closes the second valve seat 24. The lower end of the second sliding shaft 36 is connected via a connecting member 54 to the upper end of a second sliding shaft 32 that protrudes from the second VC motor 8. A second position sensor 40 is attached to the lower end of the second sliding shaft 32 that protrudes from the lower part of the second VC motor 8. This second position sensor 40 is composed of a linear scale and detects the position of the second sliding shaft 32 in units of 1 μm.

[0022] (2) Sliding structure of the first sliding shaft 34 Next, the sliding structure of the first sliding shaft 34 of the first valve 1 will be described with reference to FIGS. 2 and 3.

[0023] As shown in Figures 2 and 3, a cylindrical projection 94 protrudes downward from the lower part of the combination valve body 12 below the first outlet 16 of the first valve 1. A circular opening 96 is formed on the upper surface of this cylindrical projection 94, i.e., the contact surface with the common space 20.

[0024] As shown in Figure 3, a cylindrical first connecting body 5 is connected to the lower end of the cylindrical projection 94. An upper flange portion 98 is provided on the outer circumference of the upper end of the cylindrical body 58, which is the main body of the cylindrical first connecting body 5, and is fixed to the lower end of the cylindrical projection 94 by a bolt (not shown). As shown in Figure 3, a cylindrical support portion 60 is housed inside the cylindrical projection 94. A support through hole 62 is provided in the axial direction of this support portion 60.

[0025] As shown in Figure 3, a cylindrical sliding bearing (linear bush) 64 is housed in the upper part of the cylindrical body 58 of the first connecting body 5, below the support portion 60. A first sliding shaft 34 passes through the central axis of the sliding bearing 64, and this first sliding shaft 34 also passes through the support through hole 62 of the support portion 60 and protrudes from a circular opening 96. A first valve body 26 is attached to the upper end of this first sliding shaft 34. As shown in Figure 3, the lower end of the first sliding shaft 34 protrudes from the lower part of the sliding bearing 64. This lower end of the first sliding shaft 34 is attached to a connecting member 54 which is made of a clevis.

[0026] As shown in Figure 3, the first sliding shaft 30 protrudes axially from the center of the upper surface of the cylindrical first VC motor 7. A male screw portion 68, which has a slightly smaller diameter than the first sliding shaft 30, protrudes coaxially from the upper end of the first sliding shaft 30.

[0027] As shown in Figure 3, the connecting member 54 is made of a cylindrical clevis. The upper part of the connecting member 54 has a U-shaped recess 76. The lower end of the first sliding shaft 34 tapers and fits into the recess 76, and is rotatably fixed to the upper part of the connecting member 54 by a clevis pin 78. A female threaded portion 82 is engraved on the lower part of the connecting member 54. As shown in Figures 3 and 4, the male threaded portion 68 of the first sliding shaft 30 is screwed into the female threaded portion 82 of the connecting member 54 and fixed from below the connecting member 54 by a nut 80. This nut 80 is screwed into the male threaded portion 68.

[0028] As shown in Figures 2 and 3, a lower flange portion 74 is formed at the lower end of the cylindrical body 58 of the first connecting body 5, and is fixed to the upper part of the first VC motor 7 by bolts.

[0029] The sliding structure of the second sliding shaft 36 of the second valve 2 has the same structure as the sliding structure of the first sliding shaft 34.

[0030] (3) 1st VC motor 7 Next, the first VC motor 7 will be described with reference to Figures 4 and 5. The first VC motor 7 is a single-phase motor of the type in which only the coil 50 reciprocates within a strong magnetic field created by the magnet (Nd-Fe-B magnet) 44, and is a moving coil type.

[0031] The first VC motor 7 has a cylindrical iron outer yoke 42 that also serves as the casing. A ring-shaped magnet 44 is fixed to the inner circumferential surface of this outer yoke 42. Inside the cylindrical outer yoke 42 is a cylindrical iron inner yoke 46, and the outer yoke 42 and inner yoke 46 are fixed together by a circular lower surface 52. A gap is provided between the outer yoke 42 and the inner yoke 46. A lower shaft hole 72 opens in the center of the circular lower surface 52 and communicates with the inner circumferential surface of the cylindrical inner yoke 46. A lower sliding bearing 47 is provided at the lower part of the lower surface 52 corresponding to this lower shaft hole 72.

[0032] A cylindrical, non-magnetic coil bobbin 48 is slidably positioned along the axial direction in the gap between the outer yoke 42 and the inner yoke 46. An aluminum coil 50 is wound around the outer surface of the coil bobbin 48, and the position of this wound coil 50 is opposite to the position of the ring-shaped magnet 44.

[0033] A first sliding shaft 30 is fixed through the center of the upper part of the coil bobbin 48. The first sliding shaft 30 also slides through the inner circumference of the cylindrical inner yoke 46 and through the lower shaft hole 72, and is slidably supported by the lower sliding bearing 47. The first sliding shaft 30 further protrudes from the lower sliding bearing 47 and is inserted into a first position sensor 38, which is a linear sensor. The first position sensor 38 measures the opening and closing distance of the first valve body 26 based on the sliding distance of the first sliding shaft 30.

[0034] The upper surface of the cylindrical outer yoke 42 is covered by a circular cover 43. An upper shaft hole 70 is opened in the center of this cover 43, and an upper sliding bearing 45 is provided on its inner circumference. The first sliding shaft 30, which protrudes upward from the coil bobbin 48, is slidably supported by this upper sliding bearing 45 and protrudes from the cover 43, i.e., the first VC motor 7. A male screw portion 68 protrudes from the upper end of the first sliding shaft 30, as described above.

[0035] An upper damper 49 is positioned on the lower surface of the lid 43, and a lower damper 51 is positioned on the outer circumference of the inner yoke 46 on the lower surface 52. The upper damper 49 and the lower damper 51 provide cushioning to the coil bobbin 48, which moves up and down by magnetic force.

[0036] A wiring 53 is provided axially on the outer circumference or inside of the outer yoke 42. The lower end of this wiring 53 is connected to a terminal 55 provided on the bottom surface 52. An external wiring 134 extending from the control unit 126 is connected to the terminal 55 (see Figure 1). As shown in Figure 5, within the wiring 53 arranged inside the outer yoke 42, a positive terminal 86 and a negative terminal 88 for supplying DC current to the coil 50 are provided at the same height and within the same range P in the axial direction of the outer yoke 42. Note that "the same range P" means a range where the positive terminal 86 and the negative terminal 88 are far enough apart that they do not electrically contact each other.

[0037] One end of the positive cable 56 is connected to the positive terminal 86, and one end of the negative cable 57 is connected to the negative terminal 88. These cables 56 and 57 are what are known as robot cables, and they have bending resistance that prevents them from being damaged even after a predetermined number of bends (for example, 10 million times) and twisting resistance that prevents them from being damaged even after a predetermined number of twists (for example, 10 million times).

[0038] The other end of the positive cable 56 is connected to one end of the aluminum coil 50, and the other end of the negative cable 57 is connected to the other end of the coil 50. As shown in Figure 4, these connection points are at the same height in the axial direction, and more specifically, they are at the same distance from the bottom surface 52. Also, as shown in Figure 5, in the axial view of the coil bobbin 48, the coil 50 is connected at a position Q 90° away from the line connecting the axis O of the coil bobbin 48 and the same range P, and the negative cable 57 is connected to the coil 50 at a position R 90° away from the line connecting the axis O of the coil bobbin 48 and the same range P. In other words, with respect to the axis O of the coil bobbin 48, positions Q and R are located 180° apart.

[0039] Cable 56 is provided to be longer than the shortest distance between terminal 86 and connection point Q of coil 50. This is because the coil bobbin 48 slides. Cable 57 is the same length as cable 56 and is provided to be longer than the shortest distance between terminal 88 and connection point R of coil 50.

[0040] The operating state of the first VC motor 7 will now be described. Direct current flows from the positive cable 56 to the wound coil 50 via external wiring 134, terminal 55, and wiring 53, and then to the negative cable 57. When direct current flows through the coil 50, a magnetic field is generated between the ring-shaped magnets 44, and according to Faraday's law, the coil bobbin 48 moves axially together with the first sliding shaft 30. The first sliding speed v1 of this axial movement is determined by the strength of the direct current flowing through the coil 50. Furthermore, the position of the first sliding shaft 30 is detected by the first position sensor 38, and when the first sliding shaft 30 moves to a predetermined position, the direct current flowing through the coil 50 is cut off, stopping the sliding of the first sliding shaft 30. The sliding distance of the first sliding shaft 30 is, for example, 3 mm.

[0041] The second VC motor 8 has the same structure as the first VC motor 7 and performs the same operation.

[0042] (4) Configuration of the intermittent coating device 100 Next, the configuration of the intermittent coating apparatus 100 will be described with reference to Figure 1. A long web (for example, metal foil) W, which will be the material for the electrode member of a lithium-ion battery, is held by a backup roll 102 and travels at a predetermined travel speed V. A die 104 for intermittently coating the web W is horizontally positioned to the side of the backup roll 102. A liquid reservoir 106 is provided inside the die 104, and liquid flows from this reservoir 106 through a slit 108 to the discharge port 109 of the die 104. Guide rolls 130 and 132 are rotatably provided in front of and behind the backup roll 102 to guide the web W. To adjust the gap g, which is the gap between the discharge port 109 of the die 104 and the web W traveling on the backup roll 102, the die 104 or the backup roll 102 is supported so as to be movable in the horizontal direction by an air cylinder (not shown).

[0043] As shown in Figure 1, a tank 110 is provided for storing the coating liquid. The tank 110 is equipped with a metering pump 112 that pumps the coating liquid through a suction pipe 113. The metering pump 112 is driven by a pump motor 114. A pumping pipe 116 is provided between the metering pump 112 and the inlet 14 of the three-way valve 10. The metering pump 112 pumps a fixed amount of coating liquid per unit time to the three-way valve 10 through the pumping pipe 116.

[0044] As shown in Figure 1, one end of a liquid supply pipe 118 is connected to the first outlet 16 of the three-way valve 10, and the other end of this liquid supply pipe 118 is connected to the coating liquid inlet 120 of the die 104. One end of a circulation pipe 122 is connected to the second outlet 18 of the three-way valve 10, and the other end of this circulation pipe 122 is located inside the tank 110. A throttle valve 124 is also provided in the middle of this circulation pipe 122.

[0045] (5) Electrical configuration of the intermittent coating device 100 The electrical configuration of the intermittent coating apparatus 100 will be explained with reference to Figure 1.

[0046] The control unit 126, which is a computer, is connected to a travel motor 128 for rotating the backup roll 102, a pump motor 114 for driving the metering pump 112, a first VC motor 7 and a second VC motor 8 for the three-way valve 10, a first position sensor 38, and a second position sensor 40.

[0047] (6) Operating status of the intermittent coating device 100 Next, the operation of performing intermittent coating using the intermittent coating device 100 to form coated sections L1 and uncoated sections L2 on the web W will be explained with reference to Figures 1 and 2.

[0048] As shown in Figure 1, the worker fills the tank 110 with coating liquid, sets the gap g, which is the gap between the discharge port 109 of the die 104 and the web W, to the reference gap g0, and moves the web W at a travel speed V.

[0049] As shown in Figure 1, when the formation of the coating section L1 on the web W is to begin, the control unit 126 opens the first outlet 16 of the three-way valve 10 and closes the second outlet 18, and the metering pump 112 pumps the coating liquid from the tank 110, which then passes through the three-way valve 10 and is pumped to the die 104. The coating liquid pumped to the die 104 passes from the liquid reservoir 106 through the slit 108 and is then applied to the web W as it travels through the discharge port 109.

[0050] At this time, the control unit 126 moves the first sliding shaft 34 at a first reference sliding speed v0 to open the first outlet 16 and simultaneously close the second outlet 18, thereby starting the application of the coating liquid to the web W. The sliding stop position when the first valve body 26 of the first sliding shaft 34 is opened is detected by the first position sensor 38, and when the first sliding shaft 34 rises to a predetermined position, the control unit 126 cuts the DC current flowing to the coil 50 of the first VC motor 7, stopping the sliding of the first sliding shaft 34. Also, when closing the second outlet 18, the control unit 126 lowers the second sliding speed v2 of the second sliding shaft 36 to the same as the first reference sliding speed v0 of the first sliding shaft 34, or slightly slows it down. As a result, when the first outlet 16 is open, the coated portion is not affected by the pressure change that occurs when the second outlet 18 is closed, and no raised portion is formed at the beginning of the coated section L1. Furthermore, when the second sliding shaft 36 is closed, the sliding stops when the second valve body 28 hits the second valve seat 24.

[0051] Next, the control unit 126 measures the length of the coating section L1 of the web W from the travel speed V and continues coating.

[0052] Next, as shown in Figure 2, when coating in the coating section L1 is completed, the control unit 126 closes the first outlet 16 and simultaneously opens the second outlet 18. The first sliding speed v1 of the first sliding shaft 34 that the control unit 126 uses to close the first outlet 16 is set to the first maximum sliding speed v1max. Similarly, when the control unit 126 opens the second outlet 18 by controlling the strength of the DC current flowing through the coil 50 of the second VC motor 8, the second sliding speed v2 of the second sliding shaft 36 is set to the second maximum sliding speed v2max. The reason for this control is that the faster the discharge of the coating liquid is completed, the more it is possible to prevent the end of the coating section L1 from becoming edgy and bulging, and in order to quickly complete the discharge of the coating liquid, it is necessary to slide the first sliding shaft 34 as fast as possible to close the first valve body 26. Furthermore, when closing the first sliding shaft 34, the sliding stops when the first valve body 26 contacts the first valve seat 22. Also, when opening the second sliding shaft 36, the sliding stop position is detected by the second position sensor 40, and the sliding of the second sliding shaft 36 is stopped. This prevents bulging at the end of the coated section L1 and allows the coated section L1 to be accurately coated to a predetermined length.

[0053] Next, the control unit 126 measures the length of the uncoated section L2 of the web W from the travel speed V and forms the uncoated section L2. When the uncoated section L2 is formed, the first outlet 16 of the three-way valve 10 is closed and the second outlet 18 is open, so the coating liquid pumped from the metering pump 112 is circulated to the tank 110 by the circulation piping 122. The amount of this circulation is determined by the throttle valve 124.

[0054] Next, once the formation of the uncoated section L2 is complete, the control unit 126 opens the first outlet 16 of the three-way valve 10 again and closes the second outlet 18 again using the same control as described above, and starts coating the web W in the coated section L1.

[0055] (7) Effects Since the coil 50 wound around the coil bobbin 48 in the first VC motor 7 is made of aluminum, it is lighter than a coil made of copper wire, and even with the same magnetic force, it can move at a higher speed due to its lighter weight. As a result, the first valve body 26 and the second valve body 28 of the three-way valve 10 can open and close at high speed, and when forming a coated section L1 and an uncoated section L2 on the web W, the accuracy of the lengths of the coated section L1 and the uncoated section L2 can be improved, making it easier to perform the desired intermittent coating.

[0056] Furthermore, since the coil 50 and the wiring 53 located inside the outer yoke 42 are connected by cables 56 and 57, which are made of robotic cables, the risk of disconnection is reduced.

[0057] Furthermore, since cables 56 and 57 are the same length and extend from the same range P to opposite, distant positions Q and R on the coil bobbin 48, respectively, and connect to the coil 50, even if the coil bobbin 48 moves in the axial direction, the load is not placed on only one of the cables.

[0058] Furthermore, since the axial positions of terminals 86 and 88 of the two cables 56 and 57 and the connection position with the coil 50 are at the same height, even if the coil bobbin 48 slides vertically, the distance that cables 56 and 57 move vertically is minimized, thereby increasing the durability of cables 56 and 57.

[0059] (8) Example of change Although one embodiment of the 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, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and essence of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0060] 1...First valve, 2...Second valve, 3...First valve body, 4...Second valve body, 5...First connector, 6...Second connector, 7...First voice coil motor, 8...Second voice coil motor, 10...Three-way valve, 30...First sliding shaft, 32...Second sliding shaft, 34...First sliding shaft, 36...Second sliding shaft, 42...Outer yoke, 44...Magnet, 46...Inner yoke, 48...Coil bobbin, 50...Coil, 53...Wiring, 56...Positive cable, 57...Negative cable, 100...Intermittent coating device, 102...Backup roll, 104...Die

Claims

1. The valve body and A movable coil type voice coil motor, A sliding shaft protruding from the voice coil motor and sliding by the voice coil motor, A space through which liquid flows is provided inside the valve body, The liquid inlet provided in the valve body, The outlet of the liquid provided in the valve body, A valve seat provided at the aforementioned outlet, A valve body that opens and closes the valve seat, A sliding shaft is disposed within the aforementioned space, with one end connected to the sliding shaft and the other end having the valve body provided on it, It has, The aforementioned voice coil motor is A cylindrical outer yoke, An inner yoke is provided coaxially with a gap in the inner circumference of the outer yoke, and is fixed to the outer yoke on the axial surface opposite to the axial surface from which the sliding shaft protrudes, A ring-shaped magnet provided on the inner circumferential surface of the outer yoke, A coil bobbin is disposed on the inner circumference side of the magnet and on the outer circumference side of the inner yoke, The sliding shaft is disposed on the inner circumference side of the inner yoke and fixed coaxially with the coil bobbin, An aluminum coil wound around the aforementioned coil bobbin, The wiring arranged in the outer yoke, Two cables connecting the end of the aforementioned wiring to the coil, It has, The two cables extend from the same area on the inner circumferential surface of the outer yoke, through the ring-shaped through-hole of the magnet, and toward the coil bobbin. One of the cables is connected to the coil, which is located at a position 90° away from the line connecting the axis of the coil bobbin and the same range, at the outer circumference of the coil bobbin. The other cable is connected to the coil, which is located at a position -90° away from the line connecting the axis of the coil bobbin and the same range, at the outer circumference of the coil bobbin. The positions where the two cables and the coil are connected are the same distance from the opposite axial surface of the outer yoke. The two cables are provided to be longer than the shortest distance between the end of the wiring and the connection point of the coil, so that the coil bobbin can slide relative to the outer yoke along the axial direction of the sliding shaft. With respect to the through-hole of the ring-shaped magnet, the planar shape with the axial direction as the normal direction is an arc shape that is wider than the same range, and the same range is located on the outer yoke on the outer circumference side of the center of the through-hole. A valve characterized by the following features.

2. The cable has bending resistance so as not to break even when bent more than a predetermined number of times, and twisting resistance so as not to break even when twisted more than a predetermined number of times. The valve according to claim 1.

3. A die for applying a coating liquid to a long, moving web, A tank for storing the aforementioned coating liquid, A pump for pumping the coating liquid stored in the tank, A three-way valve comprising a first valve which is the valve described in claim 1 and a second valve which is the valve described in claim 1, wherein the space of the first valve and the space of the second valve are in communication, A pressure supply pipe for supplying the coating liquid from the pump to the inlet of the first valve, A liquid supply pipe for supplying the coating liquid from the outlet of the first valve to the die, A circulation pipe for circulating the coating liquid from the outlet of the second valve to the tank, A control unit that performs intermittent coating by alternately opening and closing the outlet of the first valve and the outlet of the second valve to alternately form coated and uncoated sections on the web, An intermittent coating apparatus characterized by having the following features.

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