JP5393612B2 - Method and device for removing charge from resin container - Google Patents

Description

  The present invention relates to a resin container that reduces the potential difference between the inner surface side and the outer surface side of the resin container by removing the electric charge charged in the resin container when the resin container is sterilized by irradiating with an electron beam. The present invention relates to a charge removal method and a charge removal apparatus.

  2. Description of the Related Art Conventionally, an electron beam container sterilization apparatus that performs sterilization by irradiating an electron beam onto a resin container such as a PET bottle has been widely used. It has been conventionally known that when a resin container is sterilized by irradiation with an electron beam, the resin container is charged. When the resin container is charged in this way, there arises a problem that dust or dust is attracted. In addition, the electric charge stays inside the wall surface of the resin container, and the outer surface that receives direct electron beam irradiation and the electric charge that passes through the wall surface and stays on the inner surface are different. There was also a problem that a large potential difference occurred between them, which caused static electricity. Accordingly, various devices for removing static electricity from charged resin containers have been proposed (see, for example, Patent Document 1 or Patent Document 2).

JP 2006-216453 A JP 2009-51517 A

  As in the case of the charged object neutralization device described in Patent Document 1, the structure is such that ions are sprayed on the object to be neutralized, and the method of manufacturing the container with contents described in Patent Document 2 is filled in the container. In the configuration in which the conductor is inserted into the contents, there is a problem that the electric charge charged inside the resin container or the like (inside the resin material) cannot be completely removed. There is also a problem that the potential difference between the inner surface and the outer surface of the resin bottle cannot be reduced.

  A method for removing charge from a resin container according to a first aspect of the present invention is made to solve the above-mentioned problem, and is connected to a grounding means on the inner surface side and the outer surface side of a resin container irradiated with an electron beam. By supplying the liquid from the liquid supply means, the inner surface side and the outer surface side are brought into conduction, and among the charges charged on the inner surface and the outer surface of the resin container, the charge on the surface with the higher potential is the surface with the lower potential. The potential difference between the inner surface and the outer surface of the resin container is reduced by flowing in the container.

  According to a second aspect of the present invention, there is provided a destaticizing apparatus for a resin container, comprising: a holding means for holding a resin container irradiated with an electron beam; and a liquid on an inner surface and an outer surface of the resin container held by the holding means. An inner surface and an outer surface by supplying a liquid from the liquid supply means to the inner surface and the outer surface of the resin container. The potential difference between the inner surface and the outer surface of the resin container is reduced by flowing the charge on the surface with the higher potential out of the charges charged on the inner surface and the outer surface of the resin container. It is characterized by making it.

  The method and apparatus for removing charge of a resin container according to the present invention supplies liquid from a liquid supply device connected to a grounding means to the inner and outer surfaces of a resin container that has been irradiated with an electron beam. Since the inner surface and the outer surface of the resin container are made conductive, the charge on the inner and outer surfaces of the wall of the resin container is greatly reduced, and the potential difference between the inner surface side and the outer surface side of the resin container is reduced. There is an effect that can be.

FIG. 1 is a plan view showing a simplified arrangement of the entire charge removing device for a resin container. Example 1 2A is a longitudinal sectional view showing a resin container held by a gripper of a rotating body, and FIG. 2B is a transverse sectional view of a guide mechanism for raising and lowering a ground electrode. FIG. 3 is a longitudinal sectional view of the rinser. FIG. 4 is a longitudinal sectional view of the filler. (Example 2)

  In the resin container irradiated with the electron beam, electric charges stay on the inner surface, the outer surface, and the inner surface of the wall surface. The resin container is provided with supply means for supplying liquid from the inner surface side and supply means for supplying liquid from the outer surface side, and these liquid supply means are connected to the ground side. By supplying the liquid uniformly from the liquid supply means over the entire inner surface side and outer surface side, the inner surface side and the outer surface side of the resin container are brought into conduction, and are retained on the inner surface and the outer surface of the resin container. By flowing the electric charge to the ground side, the object of significantly reducing the potential difference between the inner surface side and the outer surface side of the resin container is achieved.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 shows a sterilization and filling apparatus (indicated by reference numeral 1 as a whole) for filling and capping a liquid after sterilizing a container. The left side of FIG. 1 is a sterilization zone S, and the right side is a zone F for cleaning, filling and capping. (Hereinafter referred to as a filling zone). The sterilization zone S is made of lead that shields the electron beam and X-rays (braking X-rays) from leaking outside when the resin container 2 (see FIG. 2A) is sterilized by irradiating the electron beam. Is housed in a sterilization chamber 6 surrounded by the wall surface 4. In the sterilization chamber 6, a carry-in wheel 8 disposed on the inlet side and a carrying wheel 12 for rotating and carrying the container 2 delivered from the carry-in wheel 8 are provided. The resin container 2 passes through the front surface side of the electron beam irradiation device 16 while being supported and transported by the bottle support means 18 (see FIG. 2A) provided on the transport wheel 12, and the electron beam. Receive irradiation. The resin container 2 that has been irradiated with the electron beam is transferred to a carry-out wheel 34 disposed on the downstream side of the sterilization chamber 6 and sent to the next filling zone F.

  The container 2 sterilized in the sterilization zone S and filled with contents such as liquid in the filling zone F downstream thereof is a resin container 2 such as a PET bottle. The resin container 2 includes a cylindrical mouth portion 2a at the top (see FIG. 2A). A flange 2b is formed near the lower portion of the mouth 2a. The upper or lower portion of the flange 2b is gripped by a gripper, or the lower surface of the flange 2b is supported by the bottle support means 18 or other support means. And transport it in a suspended state.

  The resin container 2 is continuously transported by an air transport conveyor 29 and separated by a not-shown infeed screw or the like at a predetermined interval, and then delivered to a carry-in wheel 8 disposed on the inlet side of the sterilization chamber 6. It is. The carry-in wheel 8 is provided with a plurality of grippers 30 at equal intervals in the circumferential direction, and each gripper 30 grips and conveys the upper side of the flange 2 b of the resin container 2. The resin container 2 held and gripped by the gripper 30 of the carry-in wheel 8 is delivered to the next transport wheel 12.

  The transport wheel 12 is provided with a plurality of bottle support means 18 at equal intervals in the circumferential direction, and each bottle support means 18 supports and transports the lower surface side of the flange 2 b of the resin container 2. The carry-in wheel 8 and the transport wheel 12 are rotated synchronously, and at the supply position A, the resin container 2 is delivered from each gripper 30 of the carry-in wheel 8 to each bottle support means 18 of the transport wheel 12.

  The resin container 2 supported and supported by the bottle support means 18 of the transport wheel 12 passes through the front of the electron beam irradiation device 16, and in the meantime, the entire electron beam irradiation device covers the entire length in the vertical direction. 16 is sterilized by irradiation with an electron beam. The sterilized resin container 2 is delivered to the carry-out wheel 34 on the downstream side. The carry-out wheel 34 is provided with a plurality of grippers 36 on the outer peripheral portion at equal intervals in the circumferential direction. These grippers 36 are flanges of the resin container 2 supported by the bottle support means 18 of the transport wheel 12. Grab and receive the upper part than 2b. The carry-out wheel 34 also rotates synchronously with the transport wheel 12, and the resin container 2 is delivered from the bottle support means 18 of the transport wheel 12 to the grippers 36 of the carry-out wheel 34 at the discharge position B. The resin container 2 held by the gripper 36 of the carry-out wheel 34 is a container of the receiving wheel 120 disposed on the inlet side of the next chamber (chamber 38 of the filling zone F) provided adjacent to the sterilization chamber 6. It is delivered to a support means (not shown) and sent to the next step.

  An opening 4a is formed on one wall surface (upper wall surface in FIG. 1) of the sterilization chamber 6, and an electron beam irradiation device 16 is attached to the opening 4a. Although not shown, the electron beam irradiation device 16 includes a vacuum chamber (acceleration chamber) that irradiates the resin container 2 with an electron beam. As is well known, the filament is heated in a vacuum in the vacuum chamber. The thermoelectrons are generated and accelerated by a high voltage to form a high-speed electron beam, and then taken out into the atmosphere through a metal window foil made of Ti or the like attached to the irradiation window 16a. In the embodiment, the resin container 2) is irradiated with an electron beam and sterilized.

  Next, with reference to FIGS. 2A and 2B, the configuration of the bottle support means 18 provided on the transport wheel 12 and the ground electrode inserted into the resin container 2 during sterilization will be briefly described. The transport wheel 12 includes a horizontal disc-shaped plate 40, an annular rotating plate 41 fixed to the outer periphery of the disc-shaped plate 40, and an annular intermediate plate disposed above the rotating plate 41 and integrally rotating. A plate 42 is provided. Cylindrical rotating shafts 44 facing the vertical direction at equal intervals in the circumferential direction are rotatably supported on the outer peripheral portions of the rotating plate 41 and the intermediate plate 42 via ball bearings 46 and 48, respectively. A horizontal attachment body 50 is fixed to the lower ends of the cylindrical rotating shafts 44. A pair of grip members 52 </ b> A and 52 </ b> B (disposed on the front side and the back side of the sheet of FIG. 2A) are provided on the lower side of the attachment body 50, and are directly below the cylindrical rotation shaft 44. The resin container 2 is held at the position. The bottle support means 18 has the same configuration as the bottle support means 18 disclosed in Japanese Patent Application No. 2008-280304, and the grip members 52A and 52B are paired with each other. It attaches to the lower end of these leaf | plate springs 54A and 54B, and hold | maintains the resin-made containers 2 with the spring force of these leaf | plate springs 54A and 54B.

  A pinion gear 64 is fixed to an upper end portion of the cylindrical rotating shaft 44 to which the bottle supporting means 18 is attached and projects upward from the intermediate plate 42. In addition, a vertical intermediate shaft on the radially inner side of the position where the cylindrical rotary shaft 44 is supported of the annular rotary plate 41 and the annular intermediate plate 42 fixed to the outer periphery of the disk-shaped plate 40. 66 are rotatably supported via ball bearings 68 and 70, respectively. A sector gear 72 is attached to the upper end of each intermediate shaft 66 at substantially the same height as the pinion gear 64 of the rotating shaft 44. Teeth are formed on the surface of the sector gear 72 facing the radially outward side of the conveying wheel 12 and meshed with the pinion gear 64.

  On the other hand, a vertical pin 74 is attached to the end of the sector gear 72 facing the radially inward side of the transport wheel 12 (the left end in FIG. 2A). The cam follower 76 is rotatably supported. A tension coil spring 80 is interposed between the lower end of the vertical pin 74 and a spring receiving pin 78 fixed to the inner peripheral end of the intermediate plate 42, and the end of the sector gear 72 is connected to the radius of the transport wheel 12. It attracts inward direction. A non-rotating circular fixed plate 82 is disposed above the disk-shaped plate 40 of the transport wheel 12, and a cam 84 that swings the sector gear 72 is fixed to the outer periphery thereof. The outer peripheral surface of the cam 84 is a cam surface, and the cam follower 76 rotates along the cam surface. The sector gear 72 rotates about the intermediate shaft 66 to rotate the pinion gear 64 by the swing in the radial direction accompanying the rotational movement of the cam follower 76. The bottle support means 18 is attached to the lower end of the cylindrical rotating shaft 44 to which the pinion gear 64 is fixed at the upper end, and the pinion gear 64 is rotated by the swing of the sector gear 72, so that the mouth 2 a of the resin container 2 is By rotating the cylindrical rotating shaft 44 disposed above, the resin container 2 supported and transported by the bottle support means 18 rotates about its central axis. In this embodiment, the resin container 2 is rotated about 180 degrees in the forward and reverse directions by rotating the pinion gear 64 by the rotation of the sector gear 72.

  A through hole 50 a is formed in the horizontal mounting body 50 at a position that coincides vertically with the inner hole 44 a of the cylindrical rotating shaft 44. The top surface and the outer peripheral surface of the transport wheel 12 are covered with a cover 88. The upper portion of the pinion gear 64 reaches the top cover 88 and is slidably sealed with the cover 88. With this configuration, the rotation shaft 44 and the circular holes 44a and 64a of the pinion gear 64 fixed to the upper part thereof penetrate vertically through the internal space surrounded by the disk-shaped plate 40 and the cover 88, and are in a sterile state. The surrounding environment to be maintained and the internal environment surrounded by the disk-shaped plate 40 and the cover 88 are blocked.

  The transport wheel 12 is provided with a ground electrode 90 that is inserted into the resin container 2 when the resin container 2 transported by the bottle support means 18 is irradiated with an electron beam. The ground electrode 90 is attached to the lower end of an upright support rod 92. The ground electrode 90 and the support rod 92 are connected to the cylindrical rotation shaft 44 and the circular holes 44a and 64a of the pinion gear 64 fixed to the upper portion thereof. The horizontal mounting body 50 can be moved up and down through the through hole 50a and the like.

  A configuration for raising and lowering the ground electrode 90 will be described. An upright guide mechanism 94 is provided on the cover 88 on the radially inner side of the position where the cylindrical rotation shaft 44 is disposed. As shown in FIGS. 2A and 2B, the guide mechanism 94 includes an upright guide member 96 and guide rollers 98 attached to a plurality of positions above and below the guide member 96. A pair of guide rollers 98 are disposed at appropriate positions above and below the guide member 96, and the lifting rod 100 is moved up and down supported by the guide roller 98 and the guide member 96. The support rod 92 and the earth electrode 90 are attached to the lower end of the elevating rod 100 via a horizontal attachment member 102, and the earth electrode 90 can be raised and lowered by raising and lowering the elevating rod 100. In addition, as a material of the ground electrode 90, metals, such as stainless steel, aluminum, and titanium, and another electroconductive material can be used. In addition to the round bar shape, the cross section may be rectangular, rectangular or polygonal, and it may be formed in a saw blade shape such as a large number of protrusions on the outer peripheral surface or a brush to induce charge. You may comprise so that it may become easy. Further, the member inserted into the resin container 2 at the time of sterilization is not limited to the ground electrode 90, and any member that can be inserted into the inside from the mouth 2a of the resin container 2 and attracts electrons can be used. It may be a member connected to a positive electrode to which a voltage of 1 is applied.

  Above the top surface of the cover 88, a horizontal fixed body 103 independent of the transport wheel 12 is installed, and an elevating cam 104 is attached on the outer periphery thereof. On the other hand, a horizontal elevating member 106 is fixed to the elevating rod 100 at a position higher than the mounting member 102, and a cam follower 108 is attached to the tip of the elevating member 106. The cam follower 108 rotates and moves on the upper surface (cam surface) of the elevating cam 104 and moves up and down according to the shape of the cam, whereby the earth electrode 90 moves up and down. When the cam follower 108 is pushed up by the elevating cam 104 and rises most, the lower end of the ground electrode 90 is positioned above the mouth portion 2a of the resin container 2, and when the cam follower 108 is lowered most, as shown in FIG. The lower end of the ground electrode 90 is inserted to the vicinity of the bottom surface 2 c of the resin container 2. At this time, the descending end of the lifting rod 100 is regulated to be lowered by the horizontal attachment member 102 coming into contact with the support member 110 fixed on the top surface of the cover 88. Sometimes, the cam follower 108 stops at a height that does not contact the cam surface of the lift cam 104. In this state, the ground electrode 90 can be electrically connected to the cover 88 made of a metal conductive material through the support rod 92 made of a metal conductive material, the mounting member 102, and the support member 110, respectively. The electrode 90 and the cover 88 are energized, and electric charge flows from the ground electrode 90 to the cover 88.

  The resin container 2 supported by the bottle support means 18 of the transport wheel 12 and transported is sterilized by being irradiated with an electron beam from the electron beam irradiation device 16, and then delivered to the gripper 36 of the carry-out wheel 34. Is rotated and conveyed. Adjacent to the sterilization chamber 6 of the sterilization zone S, a chamber 38 of the filling zone F is arranged, and the resin container 2 rotated and conveyed by the carry-out wheel 34 of the sterilization zone S is disposed in the chamber 38 of the filling zone F. It is delivered to a receiving wheel 120 arranged on the inlet side. The resin container 2 delivered to the receiving wheel 120 is rotationally conveyed and supplied to the rinser 122 (see FIG. 3 described later). The inner and outer surfaces of the resin container 2 supplied to the rinser 122 are cleaned while being rotated and conveyed in the rinser 122. The washed resin container 2 is supplied to the filler 126 via the intermediate wheel 124.

  The filler 126 that has received the resin container 2 from the intermediate wheel 124 fills the contents such as a liquid while holding the resin container 2 and rotating and transporting it. The resin container 2 that has been filled in the filler 126 is taken out by an intermediate wheel 128 that also serves as a discharge wheel of the filler 126 and a supply wheel of the capper, and is supplied to the capper 130. The resin container 2 capped in the capper 130 is taken out by the discharge wheel 132 from the capper 130, discharged by the discharge conveyor 134, and sent to the next step.

  As shown in FIG. 3, the rinser 122 has a rotary table 140 attached to a central upright rotary shaft 138 serving as a rotation center, and the resin container 2 is placed on the outer periphery of the rotary table 140 at equal intervals in the circumferential direction. A gripper 142 for holding is provided. Each of these grippers 142 is rotatably supported on an upright stand 144 via a horizontal fulcrum pin 146 oriented in a direction perpendicular to the radial direction of the rotary table 14. The gripper 142 rotates 180 degrees between a horizontal position facing the radially outer side of the turntable 140 and a horizontal position facing the radially inner side. The gripper 142 grips the lower side of the flange 2b of the resin container 2 in the upright state at a position facing outward in the radial direction, and then reverses 180 degrees radially inward to invert the resin container 2 (State shown in FIG. 3).

  An inner surface injection nozzle 148 is disposed below the mouth portion 2a of the resin container 2 that is inverted by the reversal of the gripper 142. The cleaning liquid 158a sprayed by the inner surface injection nozzle 148 enters the inside from the mouth portion 2a of the resin container 2, hits the bottom surface 2c as it is, flows through the bottom surface 2c to the outer peripheral side, and then flows down along the entire inner peripheral surface. (The cleaning liquid flowing down is indicated by reference numeral 158b), flows out from the mouth portion 2a, and falls onto the rotary table 140.

  In addition, a second rotary table 150 is attached to the upper part of the rotary shaft 138, and outer surface injection nozzles 152 are disposed on the lower surface side of the second rotation table 150 so as to correspond to the inner surface injection nozzles 148. . Each of the outer surface injection nozzles 152 injects the cleaning liquid 160a toward the center of the outer surface of the bottom of the resin container 2 that has been inverted. This cleaning liquid spreads and flows down over the entire outer peripheral surface of the resin container 2 (the cleaning liquid flowing down is indicated by reference numeral 160b). The inner surface injection nozzle 148 and the outer surface injection nozzle 152 are respectively connected via a lower rotary table 140 and an upper second rotary table 150, a central rotary shaft 138, a base 154 that rotatably supports the rotary shaft 138, and the like. Are connected to the ground 156 side.

  The operation of the sterilizing and filling apparatus 1 according to the above configuration will be described. The resin container 2 to be sterilized by the sterilization and filling apparatus 1 according to this embodiment is conveyed by the air conveyance conveyor 29, pitch-cut at a predetermined interval, and then inside the sterilization chamber 6 surrounded by the lead wall 4 It is carried in. The carry-in wheel 8 disposed on the inlet side of the sterilization chamber 6 is provided with a plurality of grippers 30 at equal intervals in the circumferential direction, and the cylindrical mouth portion of the resin container 2 carried into the carry-in chamber 10 from the outside. The upper side of the flange 2b formed near the lower portion of 2a is gripped. The resin container 2 held by the gripper 30 is rotated and conveyed by the rotation of the carry-in wheel 8, and at the supply position A to the carry wheel 12, the bottle support means 18 provided on the carry wheel 12 from the gripper 30 of the carry-in wheel 8. Is passed on.

  The bottle support means 18 is rotationally moved with one of the grip members 52A, 52B facing forward in the rotational direction and the other facing backward in the rotational direction, and is gripped by the gripper 30 of the carry-in wheel 8 at the supply position A. The mouth portion 2a of the resin container 2 is pushed between the grip members 52A and 52B. Both grip members 52A and 52B are attached to the lower ends of the leaf springs 54A and 54B, respectively, and the leaf springs 54A and 54B are forcibly pushed open so that the mouth portion 2a of the resin container 2 is between the grip members 52A and 52B. Pushed in. Thereafter, the two leaf springs 54A and 54B are restored by their own spring force to hold the lower side of the flange 2b of the resin container 2 and support the lower surface of the flange 2b as shown in FIG.

  Due to the rotation of the transport wheel 12, the resin container 2 supported by the bottle support means 18 is rotationally transported in the direction of arrow R in FIG. 1 and reaches the front side of the electron beam irradiation device 16. When receiving the electron beam from the electron beam irradiation device 16, the ground electrode 90 is lowered by the elevating cam 104, and as shown in FIG. 2 (a), from the opening of the mouth portion 2a to the tip (lower end). Is inserted to a height located near the bottom surface 2 c of the resin container 2. In the sections other than the section that receives the electron beam irradiation, the ground electrode 90 is raised by the elevating cam 104 and the tip is positioned above the mouth portion 2 a of the resin container 2. The resin container 2 having the ground electrode 90 inserted therein is sterilized by being irradiated with an electron beam while moving in front of the irradiation window 16a of the electron beam irradiation device 16. If the ground electrode 90 is inserted into the resin container 2 when irradiating the electron beam as in this embodiment, the resin material that is released by irradiation and forms the resin container 2 is transmitted. Since the electrons that have entered the resin container 2 from the opening of the mouth 2a are guided to the ground electrode 90 and flow from the cover 88 to the entire apparatus through the support rod 92, the attachment member 102, and the support member 110, the resin container It is possible to suppress charging inside the resin material of the inner surface and the wall surface of 2. In particular, the electrons emitted toward the outer surface of the resin container 2 are not only osmotic due to acceleration during electron beam irradiation, but also are induced by the ground electrode 90 from the inside of the resin container 2 to cause the resin material. It acts to permeate, and is prevented from staying inside the resin material and being charged.

  The cylindrical rotating shaft 44 to which the bottle supporting means 18 is attached has a pinion gear 64 fixed to the upper end and meshed with the sector gear 72. The sector gear 72 is further connected to the outer periphery of the upper fixed plate 82. It is made to swing by a cam 84 attached thereto. While moving the front surface of the electron beam irradiation device 16 by the cam 84, the cylindrical rotating shaft 44 is rotated and the resin container 2 supported by the bottle support means 18 is rotated approximately 180 degrees in the forward and reverse directions. In this way, the resin container 2 is rotated 180 degrees in front of the irradiation window 16a of the electron beam irradiation device 16, so that the entire inner and outer surfaces on both the front and rear sides in the transport direction extend over the entire length of the resin container 2 in the vertical direction. Sterilized by irradiation.

  The resin container 2 sterilized by being irradiated with the electron beam while passing through the front side of the electron beam irradiation device 16 is supported by the bottle support means 18 and rotated and conveyed to the next carry-out wheel 34. The resin container 2 supported on the lower side of the flange 2b by the bottle supporting means 18 is transferred to the gripper 36 provided on the carry-out wheel 34 at the discharge position B and is gripped on the upper side of the flange 2b. . The resin container 2 held and rotated by the gripper 36 of the carry-out wheel 34 is delivered to the receiving wheel 120 arranged on the inlet side of the next chamber (the chamber 38 in the filling zone F).

  The resin container 2 held by the receiving wheel 120 is supplied to the next rinser 122. The gripper 142 (see FIG. 3) of the rinser 122 faces radially outward at the supply position C from the receiving wheel 120, and grips the lower side of the flange 2b of the resin container 2 in an upright state. . Thereafter, the gripper 142 is inverted inward in the radial direction to bring the resin container 2 into an inverted state. In this state, the cleaning liquid is sprayed from the lower inner surface injection nozzle 148 and the upper outer surface injection nozzle 152 to the inner surface side and the outer surface side of the resin container 2. Both the inner surface side and the outer surface side are sprayed from the spray nozzles 148 and 152 so that the cleaning liquid flows over the entire surface. The cleaning liquid sprayed on the inner surface side and the outer surface side flows down to the ground side and becomes conductive. A negative charge stays inside the wall surface of the resin container 2, and ions having a positive charge are attached to the outer surface and the inner surface of the resin container 2. If the electric potential on the outer surface directly irradiated with the electron beam is higher than that on the inner surface, the electric charge adhering to the outer surface is transferred to the outer surface by conducting the inner and outer surfaces of the resin container 2. It moves to the inner surface side having a low potential until the potential difference between the inner and outer surfaces of the resin container 2 disappears via the cleaning liquid to be sprayed, the rotary table 140, the inner surface spray nozzle 148, and the cleaning liquid sprayed to the inner surface side. In addition, when the potential on the inner surface side is higher than that on the outer surface side, by making the inner and outer surfaces of the resin container 2 conductive, the charges attached to the inner and outer surfaces move to the outer surface side having a lower potential. .

  FIG. 4 is a longitudinal sectional view showing a charge removing device for a resin container according to the second embodiment. In this embodiment, the case is applied to a filler 226. The configuration other than the filler 226 may be the same as or different from the first embodiment. The filler 226 is provided with a gripper 242 for holding the resin container 2 at equal intervals in the circumferential direction on the outer peripheral portion of the lower rotary table 240 attached to the central upright rotary shaft 238 serving as the rotation center. . Each of these grippers 242 is mounted on an upright stand 244 so that the radially outer side is directed, and the resin container 2 is held by each gripper 242 and is rotated and conveyed. Filling nozzles 260 are respectively disposed above the resin containers 2 held by the grippers 242. The filling nozzle 260 is attached to the outer peripheral portion of the second rotary table 250 disposed above the rotary table (first rotary table) 240 and is held by the gripper 242 and rotated and conveyed. 2 is filled with a conductive liquid sent via the liquid supply pipe 262.

  Furthermore, in this embodiment, an outer surface injection nozzle 264 for injecting a liquid having conductivity such as water or a cleaning liquid is provided on the outer surface side of the resin container 2 held by the gripper 242. A plurality of the outer surface injection nozzles 264 are provided around the filling nozzle 260 and are arranged so that the liquid can flow uniformly over the entire outer peripheral surface of the resin container 2. The filling nozzle 260 and the outer surface injection nozzle 264 are connected to the ground 256 side via the second rotary table 250 rotating shaft 238, the base 254, and the like. Also in this embodiment, the inner surface and the outer surface of the resin container 2 are formed by the liquid filled in the resin container 2 from the filling nozzle 260 and the liquid supplied from the outer surface injection nozzle 264 to the entire outer surface of the resin container 2. Conduction is possible, and the potential difference between the inner surface and the outer surface can be reduced.

2 Resin container 148 Liquid supply means (inner surface injection nozzle)
152 Liquid supply means (outside spray nozzle)
156 Grounding means

Claims (2)

  By supplying liquid from the liquid supply means connected to the grounding means to the inner surface side and the outer surface side of the resin container irradiated with the electron beam, the inner surface side and the outer surface side are made conductive, and the inner surface of the resin container The charging of the resin container is characterized in that the potential difference between the inner surface and the outer surface of the resin container is reduced by flowing the charge on the surface with a higher potential among the charges charged on the outer surface to the surface with a lower potential. Removal method. A processing apparatus having a holding means for holding a resin container irradiated with an electron beam, and a liquid supply means for supplying a liquid to the inner and outer surfaces of the resin container held by the holding means, and connected to the processing apparatus And grounding means,
By supplying a liquid from the liquid supply means to the inner surface and the outer surface of the resin container, the inner surface side and the outer surface side are electrically connected to each other, and a surface having a high potential among the charges charged on the inner surface and the outer surface of the resin container. The charge removing device for a resin container is characterized in that the potential difference between the inner surface and the outer surface of the resin container is reduced by flowing the electric charge on the surface having a low potential.

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