JP4903608B2 - Electron beam irradiation device for open containers - Google Patents

Description

  The present invention relates to an electron beam irradiation apparatus for an open container, and more particularly to an electron beam irradiation apparatus for an open container that can improve the efficiency of electron beam irradiation and sterilize the inner and outer surfaces of the open container.

  Plastic filling containers are used for filling beverages, foods, medicines, and even cosmetics. Prior to filling the contents of the open container, the inside is sterilized to be aseptic, and then the contents are filled and sealed. In the sterilization of the open container, an electron beam is used instead of using a chemical that requires a large amount of equipment, and the inner and outer surfaces of the open container that is conveyed at high speed have been sterilized.

  Hereinafter, an example of an electron beam irradiation apparatus that sterilizes the inner and outer surfaces of a general plastic open container such as a PET bottle will be described. It has been proposed that the open container is moved from an upright state to a lateral state during transportation and moved while rotating in the electron beam irradiation area provided with the electron beam generating means, and the inner and outer surfaces of the open container are sterilized with the electron beam. (For example, refer to Patent Document 1).

  In addition, when the electron beam generating means is arranged vertically in the electron beam irradiation area, the open container is transported into the irradiation area in an upright state, and the electron from the electron beam generating means is moved when the open container is rotated. It has been proposed to sterilize the inner and outer surfaces of the open container with a wire (see, for example, Patent Document 2). Similarly, when the open container is transported into the irradiation area in an upright state, one electron beam irradiation means is provided in the irradiation area, and the electron beam from the electron beam irradiation means is transferred in the container transport direction by an alternating magnetic field. It has also been proposed to perform sterilization by scanning along, subdividing the electron beam with a radial nozzle, and sequentially irradiating the plurality of open containers with the electron beam (see Patent Document 3).

  In the electron beam irradiation apparatus of the above-mentioned Patent Document 1, the open container that is being conveyed in an upright state is temporarily laid down, and irradiation treatment is performed in the state of being laid down. In addition, a sideways mechanism and a pulling mechanism are required, and because of these mechanisms, the transport speed of the open container is remarkably reduced, and there is a problem that it is difficult to incorporate it into a production line that is desired to improve production efficiency by transporting at high speed. .

  Moreover, the electron beam irradiation apparatus of Patent Document 2 can be incorporated into a production line for various products. However, since the individual open containers are irradiated with electron beams from the side in the process of passing through one electron beam irradiation window part of the electron beam generating means during continuous conveyance of the open containers, the open containers In order to sufficiently sterilize the inner and outer surfaces, there is a problem that the conveying speed must be slowed or high energy electron beam generating means must be used.

  Furthermore, in the electron beam irradiation apparatus of Patent Document 3, it is necessary to divide a large number of radial nozzles into one electron beam irradiation means for the irradiation treatment of each open container that is continuously conveyed, resulting in a complicated structure. However, in order to sufficiently sterilize by irradiating the inside of the open container with an electron beam, it is necessary to reduce the conveyance speed, and there is a problem that hinders the improvement of the efficiency of the production line.

  In order to improve this, the present inventors have arranged an electron beam irradiation apparatus for an opening container so that it can be rotated by arranging a rotary carrier in the irradiation treatment tank, and a plurality of them are provided at equal intervals on the outer surface of the rotary carrier. It has been proposed that the opening container is held by each holding mechanism by the holding mechanism and can be rotated and conveyed at high speed in order. In this apparatus, a specific range of a transport path formed between the irradiation processing tank and the rotary transport body is set as an irradiation area, and an electron beam generating means is disposed above the transport path of the irradiation area, and an electron from the electron beam generating means is arranged. Sterilize the open container with radiation.

Japanese Patent Laid-Open No. 10-268100 Japanese Patent Laid-Open No. 11-1212 JP 2002-104334 A

  However, in the above-described electron beam irradiation apparatus for an open container, the open container that has been rotated and conveyed to the irradiation area of the irradiation processing tank is irradiated with an electron beam that has passed through a small irradiation window portion on the upper surface of the irradiation processing tank, and sterilized. It is something to process. For this reason, the electron beam is transferred to the open container when the emission port of the grid of the electron beam generation source in the electron beam generating means, the irradiation window of the irradiation processing tank, and the position of the open container are not on the same line and are slightly shifted. The amount of electron beam irradiation decreases, and in an extreme case, the electron beam irradiation efficiency of the open container may become half or less.

  In addition, since this type of electron beam irradiation device for an open container continuously irradiates an electron beam from the electron beam generating means, not only the open container at the position facing the irradiation window when shifted as described above, There is a possibility that the outer surface of the adjacent open container is irradiated and the electron beam is excessively irradiated to the open container.

  In order to prevent the irradiation of the electron beam to the opening container other than the irradiation target, the opening container is transported by increasing the interval of the holding mechanism of the rotating transport body, and an electron beam shield is attached to each holding mechanism portion, It is necessary to devise such as limiting the range of irradiation. As a result, the size of the rotary transport body and the irradiation processing tank is increased, and the capacity of the power supply device of the electron beam generating means is increased, so that the opening container electron applied to the production line that transports the open container at high speed. The beam irradiation apparatus has a problem that it becomes large in size and can be manufactured economically.

  An object of the present invention is to provide an electron beam irradiation apparatus for an opening container that can significantly improve the irradiation efficiency of the electron beam to the opening container, can effectively sterilize the opening container, can be miniaturized, and can be manufactured economically. It is in.

  In the electron beam irradiation apparatus for an open container of the present invention, a rotating transport body is rotatably disposed in an irradiation processing tank, and a plurality of holding mechanisms are provided on the outer surface of the rotating transport body at equal intervals, and the irradiation processing tank rotates. The specific range of the transport path formed between the transport body and the electron beam irradiation area is set as the electron beam irradiation area, the electron beam generating means is disposed above the transport path of the irradiation area, and the opening container is formed by each holding mechanism of the rotary transport body. Holding and rotating and irradiating an electron beam from the electron beam generating means in the irradiation area from an irradiation window of the irradiation processing tank to sterilize the inner and outer surfaces of the open container, the rotating carrier The rotating shaft of the electron beam generating means is secretly penetrated to the electron beam generating means side, the grit plate of the electron beam generating source of the electron beam generating means is rotatably attached to the rotating shaft, and a plurality of discharge ports are rotated and conveyed to the grit plate Formed at the same interval as the body holding mechanism, Is characterized in that said holding mechanism for holding the irradiation window and opening the container of the irradiation treatment chamber and the outlet is configured to be positioned on substantially the same vertical line in.

  Further, the electron beam irradiation apparatus for an opening container of the present invention is configured such that a rotary transport body is rotatably disposed in an irradiation processing tank, and a plurality of holding mechanisms are provided at equal intervals on the outer surface of the rotary transport body. A specific range of the transport path formed between the rotary transport body and the rotary transport body is defined as an electron beam irradiation area, electron beam generating means is disposed above the transport path of the irradiation area, and is opened by each holding mechanism of the rotary transport body A container is held and rotated and transported, and an electron beam from the electron beam generating means is irradiated from the irradiation window of the irradiation processing tank in the irradiation area to sterilize the inner and outer surfaces of the open container, and the irradiation The treatment tank is provided with a pressure reducing means for maintaining the inside in a negative pressure state, the rotating shaft of the rotating carrier is secretly penetrated to the electron beam generating means side, and the electron beam generating source of the electron beam generating means is inserted into the rotating shaft. A grit plate is rotatably attached to the grit plate. Several discharge ports are formed at the same interval as the holding mechanism of the rotary carrier, and the discharge port, the irradiation window of the irradiation processing tank, and the holding mechanism for holding the open container in the irradiation area are on substantially the same vertical line. It is characterized by being configured to be located at.

  Preferably, the electron beam emission port provided in the grit plate and the irradiation window provided in the irradiation treatment tank are provided separately for the inner surface and the outer surface of the open container.

  Preferably, the plurality of discharge ports of the grit plate include an inner surface hole of the opening container and an outer surface hole arranged on the concentric circle, and the irradiation window provided in the irradiation processing tank is for the inner surface of the opening container. It is characterized by comprising an arc groove and arc grooves for external surfaces on the inside and outside.

  If the electron beam irradiation device for an open container is configured as in the present invention, when the open container is sterilized with an electron beam in the irradiation processing section in the irradiation processing tank, the electron beam is efficiently disposed on the inner and outer surfaces of the open container. Since irradiation is possible, the electron beam irradiation efficiency can be greatly improved. For this reason, since the irradiation of the electron beam to the inner and outer surfaces of the open container can be satisfactorily performed without any difference between inside and outside, the open container can be effectively sterilized.

  In addition, since the electron beam irradiation efficiency is improved, the capacity of the power supply device of the electron beam irradiation means can be reduced, the interval between the holding mechanisms provided on the rotating carrier is narrowed, and the shield and cooling means are omitted or simplified. it can. For this reason, since the dimension of a rotary conveyance body and an irradiation processing tank can be made small, the whole electron beam irradiation apparatus for opening containers can be reduced in size, and can be manufactured economically.

In the electron beam irradiation apparatus for an opening container of the present invention, a rotary transport body is rotatably arranged in an irradiation treatment tank, and a plurality of holding mechanisms are provided at equal intervals on the outer surface of the rotary transport body. A specific range of a transport path formed between the irradiation processing tank and the rotary transport body is set as an electron beam irradiation area, and an electron beam generating means is disposed above the transport path in the irradiation area. The opening container is held and rotated by each holding mechanism of the rotating transport body, and the electron beam from the electron beam generating means is irradiated through the irradiation window of the irradiation processing tank in the irradiation area to sterilize the inner and outer surfaces of the opening container. . The rotating shaft of the rotary carrier is secretly penetrated to the electron beam generating means side, and a grit plate of an electron beam generating source of the electron beam generating means is rotatably attached to the rotating shaft. In the grit plate, a plurality of discharge ports are formed at the same interval as the holding mechanism of the rotary transport body, and the holding mechanism for holding the discharge port, the irradiation window of the irradiation processing tank, and the open container in the irradiation area is substantially. It is configured to be located on the same vertical line.
Arrange and configure.

  The principle of the electron beam irradiation apparatus for an open container to which the present invention is applied is shown in FIG. 1A, and a plastic bottle is used as the open container. A front pressure adjusting tank 20 and a rear pressure adjusting tank 30 are disposed adjacent to the side surface of the irradiation processing tank 10 disposed in the center and are integrally connected. In these tanks 10, 20, and 30, rotary conveyance bodies 11, 21, and 31 that are rotated by a drive mechanism (not shown) and rotated as indicated by arrows are rotatably arranged.

  With the arrangement of the rotary transfer bodies 11, 21, and 31, an annular transfer path for sequentially transferring the open container 1 is formed between the outer wall surfaces of the tanks 10, 20, and 30. Therefore, in the production line of the open container 1, the pre-pressure adjusting tank 20 connected to the pre-processing line, the irradiation processing tank 10, and finally the post-pressure adjusting tank 30 connected to the post-processing line are sequentially arranged. .

  Each of the rotary transport bodies 11, 21, 31 is provided with a plurality of holding mechanisms 2 that hold and transport the open container 1 on the outer surface at equal intervals. By each holding mechanism 2, the open container 1 is placed between the rotary transport bodies 11, 21, and 31 in the tanks 10, 20, and 30 in order from the pretreatment line to the posttreatment line in an upright state. It is configured so that it can be delivered smoothly.

  In this example, the inside of the irradiation processing tank 10 has a pressure-resistant sealed structure that can reduce the pressure inside. The piping 14 connected to the exhaust means including the vacuum evacuation device 13 is connected to the irradiation processing tank 10, and the surroundings of the open container 1 to be transported are connected. The atmosphere is maintained at a predetermined negative pressure. In addition, in the irradiation area provided in the irradiation processing tank 10, at least one electron beam generating means 40 for electron beams connected to a power source is provided in a portion corresponding to the transport path serving as an electron beam irradiation chamber. The electron beam generating means 40 irradiates an electron beam toward a transfer path serving as an electron beam irradiation chamber in the irradiation processing tank 10 in a negative pressure state, and the opening containers 1 that are transferred and moved are continuously sterilized in order. do.

  When sterilizing by irradiating the inner and outer surfaces of the open container 1 with an electron beam in the irradiation treatment tank 10 in a negative pressure atmosphere, the electron beam generating means 40 uses a low energy having an acceleration voltage of 150 kV or less. it can. When the inside of the irradiation treatment tank 10 is in a reduced pressure state, the attenuation of the electron beam is greatly reduced. Therefore, even with a low-energy electron beam, the electron range (flight distance) becomes long, and the electron beam The amount of divergence is small, and the inner and outer surfaces of the open container 1 can be effectively irradiated with an electron beam.

  Before being able to maintain the negative pressure state in the irradiation treatment tank 10 and to perform good electron beam irradiation, before connecting to the pretreatment line side which is the carry-in side of the open container 1 and the post-treatment line which is the carry-out side The pressure adjustment tank 20 and the rear pressure adjustment tank 30 are devised in the structure of the rotary conveyance bodies 21 and 31 disposed inside. Each of the rotary transport bodies 21 and 31 is provided with a partition wall 3 that separates the holding mechanisms 2 from each other. When the rotary transport bodies 21 and 31 are rotated, the partition walls 3 on both sides of each holding mechanism 2 and the tank wall surface are provided. Thus, the plurality of small sections 22 and 32 can be formed.

  And on the front pressure adjusting tank 20 side, in order to depressurize a plurality of small sections 22 existing in a range where the opening container 1 is moved from the position where the open container 1 is taken in from the previous process line to the irradiation processing tank 10, a vacuum exhaust device 23 is provided on each wall surface. The piping 24 connected to the exhaust means including the is connected. Thereby, the small compartment 22 existing in the range from the carry-in of the opening container 1 to the pre-pressure adjustment tank 20 from the previous process line to the irradiation treatment tank 10 is set to a pressure adjustment range from atmospheric pressure to a desired negative pressure. I manage.

  Similarly, on the rear pressure adjusting tank 30 side, in order to depressurize the small sections 32 formed in the range in which the open container 1 is moved from the irradiation processing tank 10 to the position of the post-process line, a vacuum exhaust device 33 is provided on each wall surface. The piping 34 connected to the exhausting means including it is connected. As a result, the small section 32 in the range in which the open container 1 is carried out from the irradiation treatment tank 10 to the post-process line side of the post-pressure adjustment tank 30 is in the pressure adjustment range where the desired negative pressure to atmospheric pressure is reached. I manage.

  Each partition 3 forming the small sections 22 and 32 is provided so as to have a minute gap G between the outer walls of the tanks 20 and 30 as shown in FIG. Since there are a plurality of partition walls 3 in the respective ranges on the air release side of the front pressure adjustment tank 20 and the rear pressure adjustment tank 30 from the irradiation treatment tank 10, the operation is the same as that of the labyrinth seal structure. For this reason, since the flow path resistance from the irradiation treatment tank 10 to the outside of the atmospheric pressure increases, it is not necessary to use a special seal or the like, and the negative pressure state of the irradiation treatment tank 10 can be maintained.

  In the above electron beam irradiation apparatus for an open container, the open container 1 is sent to each front pressure adjustment tank 20 in an upright state from the previous process line, and sequentially passes from the front pressure adjustment tank 20 through the irradiation treatment tank 10 to the post pressure. It is carried out from the adjustment tank 30 to a post-process line. The predetermined range of the irradiation treatment tank 10 part carrying the open container 1 is an irradiation area, and the electron beam generating means 40 is arranged in this part, so that it rotates while moving with the electron beam from the electron beam generating means 40. The open container 1 is irradiated and sterilized in a negative pressure atmosphere. Therefore, the open container 1 that is transported at a high speed while standing upright on a production line for beverages or the like effectively sterilizes the open container 1 with an electron beam using the low energy electron beam generating means 40. be able to.

  In the specific example of FIG. 2 of the electron beam irradiation apparatus for a specific opening container of the present invention, the diameter of the irradiation processing tank 10 is formed larger than that of the front pressure adjusting tank 20 and the rear pressure adjusting tank 30 that are integrally connected. Yes. In this irradiation treatment tank 10, at least one electron beam generating means 40 is disposed in an arcuate range of the upper surface portion facing the irradiation area of the conveyance path of the open container 1, and is connected to a power supply device (not shown). is doing. Also in this structure, the open container 1 is sterilized by being irradiated with an electron beam in the irradiation area of the irradiation processing tank 10 while moving from the previous process line side to the subsequent process line side as described above. .

Only the irradiation treatment tank 10 portion to which the present invention is applied is shown in FIG. The irradiation processing tank 10 is provided with an electron beam generating means 40 on the upper part facing the conveyance path serving as an irradiation area. The electron beam generating means 40 includes an electron beam generating source 41 for making a high vacuum such as 10 ⁻⁵ Pa inside. The electron beam EB from the electron beam generation source 41 passes through the irradiation window 43 formed on the upper plate 10A of the irradiation area and provided with a thin film (not shown) as indicated by a broken line, and passes through the inner and outer surfaces of the open container 1. Sterilization is performed by irradiation with an electron beam EB.

  The rotary shaft 12 of the rotary carrier 11 passes through the upper plate 10 </ b> A of the irradiation processing tank 10, and a part of the rotary shaft 12 protrudes into the electron beam generating means 40. The rotary shaft 12 is provided with a rotary vacuum seal member 12 </ b> A such as a labyrinth structure that can maintain airtightness in a portion that penetrates the irradiation treatment tank 10.

  As is well known, the electron beam generation source 41 includes a filament 44 and a grid plate 45, which are connected to a power supply device (see FIG. 5) via insulated terminals that penetrate the lead wires 50 and 51 and the electron beam generation means 40. The electron beam generated in the high vacuum is accelerated and irradiated to the transport path in the irradiation area in the irradiation processing tank 10 from the emission port 46 provided in the grid plate 45.

  The grid plate 45 of the electron beam generating source 41 is rotatably attached to the rotating shaft 12 projected into the electron beam generating means 40 according to the present invention via an insulating support rotating member 47. 45 rotates in the same direction. For this reason, the rotating grid plate 45 is provided with a rotation connecting member 49 for supplying a grid voltage, and a voltage can be supplied to the grid plate 45 by connecting a lead wire 51 to the rotating connecting member 49. It is said.

  The grid plate 45 is provided with a plurality of discharge ports 46 on concentric circles at positions facing the irradiation window 43. Moreover, each discharge port 46 is formed with the same interval (pitch) as the interval (conveyance pitch) of the holding mechanism 2 provided in the rotary conveyance body 11. As a result, the discharge port 46 of the grid plate 45 that rotates the same as the rotation shaft 12 and the holding mechanism 2 that holds the opening container 1 of the rotary transport body 11 are configured to rotate while always maintaining the same position. The discharge container 46 and the open container 1 that moves while being held by the holding mechanism 2 have substantially the same positional relationship in the vertical direction.

  When the plurality of discharge ports 46 are formed on the entire circumferential surface of the grid plate 45 at the same interval as the holding mechanism 2, for example, as shown in FIG. 4, an inner surface hole 46 </ b> A that aligns with the center of the open container 1 and the outer surface of the open container 1. The central hole 46A is formed larger than the external hole 46B. The central internal hole 46A for inserting an electron beam into the open container 1 is formed separately from the external hole 46B.

  Further, a plurality of irradiation windows 43 provided on the upper plate 10 </ b> A of the irradiation processing tank 10 are provided so as to oppose the discharge ports 46 of the grid plate 45 in the range of the irradiation area. For example, as shown in FIG. 4, each irradiation window 43 is divided into an inner surface arc groove 43A having the same size as the inner surface hole 46A and the outer surface hole 46B, and inner and outer outer surface arc grooves 43B. As long as the open container 1 exists in the conveyance path below the inner surface arc groove 43A and the outer surface arc groove 43B, the electron beam can be irradiated.

  In this way, the holding mechanism 2 holding the discharge port 46 of the grid plate 45 and the open container 1 rotates, reaches the irradiation area of the irradiation processing tank 10, and the irradiation window 43 is positioned on substantially the same vertical line. The electron beam constantly emitted from the electron beam generating source 41 in the electron beam generating means 40 is irradiated toward the open container 1 and the inner and outer surfaces of the open container 1 are sterilized by the electron beam. Will be given.

  Therefore, the electron beam from the electron beam generation source 41 in the electron beam generating means 40 can be reliably improved with little difference between the inner and outer surfaces of the open container 1 and the electron beam irradiation efficiency can be greatly improved. In addition, since the discharge port 46 and the holding mechanism 2 are configured to rotate and move in the same position at the same interval, only when the emission port 43 is substantially on the same vertical line as the irradiation window 43, Irradiation will be performed. For this reason, it is no longer necessary to irradiate the other open container adjacent to the open container 1 to be irradiated, and the electron beam can be irradiated without waste. Therefore, the capacity of the power supply device of the electron beam irradiation means 40 is significantly reduced. it can.

  In addition, since the discharge port 46, the irradiation window 43, and the holding mechanism 2 are irradiated with an electron beam when they are on substantially the same vertical line, only the target open container can be sterilized, so that the holding provided on the rotary transport body The interval between the mechanisms can be narrowed, and the shield and cooling means required for the holding mechanism 2 can be omitted or simplified. For this reason, since the dimension of not only the rotation conveyance body 11 but the irradiation processing tank 10 can be made small, the whole electron beam irradiation apparatus for opening containers can be reduced in size and can be manufactured economically.

  In addition, in the electron beam irradiation apparatus for opening containers of the above-described embodiment, the irradiation treatment tank 10 has been described using the one that maintains the inside at a negative pressure, but the present invention is not limited to such a configuration. In the irradiation area of the irradiation processing tank 10, the rotating grid plate discharge port 46, the irradiation window 43 of the irradiation processing tank 10, and the opening container 1 held by the holding mechanism 2 are positioned on substantially the same vertical line. Can be applied to all of those in which the inside of the irradiation treatment tank 10 is set to atmospheric pressure or a gas atmosphere.

It is the schematic which shows the principle of the electron beam irradiation apparatus for open containers to which this invention is applied. 1 is a schematic plan view showing a partially sectioned electron beam irradiation apparatus for an open container to which the present invention is applied. It is a schematic longitudinal cross-sectional view which shows the electron beam irradiation apparatus for open containers of one Example of this invention. It is a perspective view which shows the principal part example of the electron beam irradiation apparatus for open containers of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Opening container, 2 ... Holding mechanism, 3 ... Partition, 10 ... Irradiation processing tank, 11 ... Rotating conveyance body, 12 ... Rotating shaft, 40 ... Electron beam generation means, 41 ... Electron beam generation source, 43 ... Irradiation window, 43A ... Arc groove for inner surface, 43B ... Arc groove for outer surface, 45 ... Grid plate, 46 ... Release port, 46A ... Hole for inner surface, 46B ... Hole for outer surface, 47 ... Insulating support rotating material, EB ... Electron beam.

Claims (4)

  A rotary conveyance body is rotatably arranged in the irradiation treatment tank, a plurality of holding mechanisms are provided at equal intervals on the outer surface of the rotation conveyance body, and a conveyance path formed between the irradiation treatment tank and the rotation conveyance body is specified. The range is an electron beam irradiation area, an electron beam generating means is arranged above the transport path of the irradiation area, and the opening container is held and rotated by each holding mechanism of the rotating transport body. An electron beam from the line generating means is irradiated from an irradiation window of the irradiation processing tank to sterilize the inner and outer surfaces of the open container, and the rotation shaft of the rotating carrier is kept secret to the electron beam generating means side. The grit plate of the electron beam generating source of the electron beam generating means is rotatably attached to the rotating shaft, and a plurality of discharge ports are formed in the grit plate at the same interval as the holding mechanism of the rotary carrier, In the irradiation area, the discharge port and the irradiation treatment tank An electron beam irradiation device for opening a container, characterized by being configured such that the holding mechanism for holding the irradiation window and opening the container is positioned substantially on the same vertical line.   A rotary conveyance body is rotatably arranged in the irradiation treatment tank, a plurality of holding mechanisms are provided at equal intervals on the outer surface of the rotation conveyance body, and a conveyance path formed between the irradiation treatment tank and the rotation conveyance body is specified. The range is an electron beam irradiation area, an electron beam generating means is arranged above the transport path of the irradiation area, and the opening container is held and rotated by each holding mechanism of the rotating transport body. A pressure reducing means for sterilizing the inner and outer surfaces of the open container by irradiating an electron beam from the radiation generating means from an irradiation window of the irradiation processing tank, and maintaining the inside of the irradiation processing tank in a negative pressure state A rotating shaft of the rotating carrier is secretly penetrated to the electron beam generating means side, and a grit plate of an electron beam generating source of the electron beam generating means is rotatably attached to the rotating shaft, and a plurality of grit plates are attached to the grit plate. The same outlet as the holding mechanism of the rotary carrier For the open container, the discharge port, the irradiation window of the irradiation processing tank, and the holding mechanism for holding the open container are positioned on substantially the same vertical line in the irradiation area. Electron beam irradiation device.   3. The opening container according to claim 1, wherein the electron beam emission port provided in the grit plate and the irradiation window provided in the irradiation treatment tank are provided separately for the inner surface and the outer surface of the opening container. Electron beam irradiation device.   In any one of Claim 1 to 3, the several discharge port of the said grit board consists of the hole for inner surfaces of an opening container, and the hole for outer surfaces arrange | positioned on this concentric circle, The irradiation window provided in the said irradiation treatment tank is, An electron beam irradiation apparatus for an opening container, comprising an arc groove for an inner surface of the opening container and arc grooves for the outer surface on the inside and outside.

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