JP-2026076039-A - Electron beam irradiation device

Abstract

[Problem] To provide a shielding structure that is easy to maintain and does not require high molding precision. [Solution] The electron beam irradiation device (100) comprises an electron beam generator (4) that generates an electron beam, a transport cylinder (5) that transports the paper (P) so that it passes through the irradiation region (IR) irradiated by the electron beam by holding and rotating a part of the paper (P) to be irradiated by the electron beam, and a shielding structure (8) provided around the irradiation region (IR) in the transport cylinder (5) to shield against radiation. The shielding structure (8) has a plurality of first members (81) whose sides facing the outer circumferential surface (51b) of the transport cylinder (5) are formed in a concave shape. The plurality of first members (81) are arranged to cover the outer circumferential surface (51b). [Selection Diagram] Figure 1

Inventors

• 林 泰隆

Assignees

• 株式会社ＮＨＶコーポレーション

Dates

Publication Date

20260511

Application Date

20241023

Claims (5)

1. An electron beam generator that generates an electron beam, A cylindrical body that holds and rotates a portion of the object to be irradiated by the electron beam, thereby transporting the object to be irradiated so that it passes through the irradiation area to which the electron beam is irradiated, The cylindrical body comprises a shielding structure provided around the irradiation area for shielding radiation, The shielding structure has a plurality of first members, the side facing the outer circumferential surface of the cylindrical body being formed in a concave shape, An electron beam irradiation device in which a plurality of the first members are arranged to cover the outer surface.
2. The electron beam irradiation apparatus according to claim 1, wherein the first member has a first opposing portion facing the outer circumferential surface and a pair of first side portions formed to extend toward the outer circumferential surface from both ends of the first opposing portion.
3. The electron beam irradiation apparatus according to claim 2, wherein the shielding structure has a plurality of second members that seal the spaces between adjacent first members.
4. The electron beam irradiation apparatus according to claim 3, wherein the second member straddles the adjacent ends of the first members and the side facing the first members is formed in a concave shape.
5. The electron beam irradiation apparatus according to claim 4, wherein the second member has a second opposing portion facing the outer peripheral surface, and a pair of second side portions formed to extend from both ends of the second opposing portion, facing the inner surface of one of the adjacent first members and the inner surface of the other first side portion, respectively.

Description

Application for application of Article 30, Paragraph 2 of the Patent Law has been filed. Publication Dates: May 28, 2024 - June 7, 2024. Exhibition Name and Venue: International Printing & Media Industry Exhibition drupa 2024, Messe Düsseldorf GmbH, Messeplatz Stockumer Kirchstra■e 61 40474, Düsseldorf / Germany This disclosure relates to an electron beam irradiation apparatus for irradiating an object with an electron beam. In an electron beam irradiation device, the object to be irradiated is transported so that it passes through the irradiation area to be irradiated with the electron beam, thereby irradiating the object with the electron beam. Furthermore, since radiation is generated during electron beam irradiation, the device is designed to shield against radiation to prevent it from leaking to the outside. For example, Patent Document 1 describes an electron beam irradiation device that uses a gripper device provided on the surface of a rotating cylinder to grasp a printed object to be irradiated and transport it so that it passes through an electron beam irradiation area. In this electron beam irradiation device, shielding means for blocking X-rays are provided around the electron beam irradiation area in the cylinder. Japanese Utility Model Publication No. 4-145400 This is a cross-sectional view showing the configuration of an electron beam irradiation apparatus according to one embodiment of the present disclosure.This is a perspective view showing the configuration of the main components of the electron beam irradiation apparatus described above.This is a front view showing the configuration of the first member of the shielding structure in the electron beam irradiation apparatus described above.This is a front view showing the configuration of the second member of the shielding structure described above.This is a front view showing the configuration of the shielding structure according to the first modified example of the electron beam irradiation apparatus described above.This is a front view showing the configuration of a shielding structure according to a second modified example of the electron beam irradiation apparatus described above. [Embodiment] One embodiment of this disclosure will be described in detail below. <Configuration of the electron beam irradiation device> Figure 1 is a cross-sectional view showing the configuration of an electron beam irradiation device 100 according to this embodiment. Figure 2 is a perspective view showing the configuration of the main parts of the electron beam irradiation device 100. Figure 3 is a front view showing the configuration of the first member 81 of the shielding structure 8 in the electron beam irradiation device 100. Figure 3 is a front view showing the configuration of the second member 82 of the shielding structure 8. As shown in Figures 1 and 2, the electron beam irradiation device 100 irradiates the paper P (object to be irradiated) with an electron beam generated by the electron beam generator 4 for printing. Therefore, the electron beam irradiation device 100 transports the paper P so that it passes through the irradiation region IR where the electron beam is irradiated, by rotating the transport cylinder 5 (cylindrical body). Furthermore, the electron beam irradiation device 100 shields the radiation generated when the electron beam irradiates the transport cylinder 5 (metal) with a shielding structure 8. The electron beam irradiation device 100 comprises a housing 1, a shielding cover 2, a pair of support members 3, an electron beam generator 4, a transport cylinder 5, a supply cylinder 6, a discharge cylinder 7, a shielding structure 8, and a shielding plate 9. The housing 1 is a structure that covers the transport cylinder 5, supply cylinder 6, discharge cylinder 7, shielding structure 8, and shielding plate 9. The housing 1 has a bottom plate 1a and a pair of partition plates 1b. The pair of partition plates 1b are formed to rise from the rear and front edges of the electron beam irradiation device 100 on the bottom plate 1a and to face each other. The housing 1 has open sides on both sides in Figure 1 to allow for the supply of paper P to the supply cylinder 6 and the receipt of paper P from the discharge cylinder 7. Furthermore, the top of the housing 1 is open to facilitate maintenance of the shielding structure 8, the transport cylinder 5, and other components. Note that Figure 1 only shows the rear partition panel 1b, omitting the front partition panel 1b. Furthermore, the structure of the enclosure 1 described above is merely an example and is not limited to this structure. The shielding cover 2 is a box-shaped cover that shields the electron beam generator 4. The basic structure of the shielding cover 2 is made of lead, and the inner and outer surfaces of the basic structure are covered with layers of stainless steel for rust prevention and strength. The pair of support members 3 are members that support the shielding struct