JP2010190802A

JP2010190802A - Radiation collimator and radiation detector with the same

Info

Publication number: JP2010190802A
Application number: JP2009037163A
Authority: JP
Inventors: Masahiro Kato; 昌浩加藤; Yoshikatsu Kuroda; 能克黒田; Mitsunobu Onishi; 光延大西
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2010-09-02
Anticipated expiration: 2029-02-19
Also published as: JP5148529B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation collimator that facilitates enlarging an area and achieving a high aspect ratio, and to provide a radiation detector with the collimator. <P>SOLUTION: The radiation collimator is structured such that a plurality of layers having a plurality of longitudinal plates 12 having first and second sawtooth-shaped teeth formed at both ends of a breadthwise direction of the plate and a plurality of lateral plates 13 having first and second sawtooth-shaped teeth formed at both ends of a breadthwise direction of the plate are laminated and that a plurality of rectangular through-holes comprising the longitudinal plates 12 and the lateral plates 13 are arranged in a grid. In addition, the radiation collimator is such structured that both ends of the longitudinal plates 12 and the lateral plates are fitted into longitudinal plate grooves and lateral plate grooves inside a guide frame to be supported. In addition, the radiation detector includes the radiation collimator and a radiation detection unit provided at one of ends in a depth direction of the radiation collimator. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は放射線コリメータ及びこれを備えた放射線検出器に関する。 The present invention relates to a radiation collimator and a radiation detector including the radiation collimator.

放射線コリメータと放射線検出部とを備えた放射線検出器は、天文や医療などの様々な分野で利用されている。 A radiation detector including a radiation collimator and a radiation detection unit is used in various fields such as astronomy and medicine.

例えば、天文衛星には、Ｘ線などの宇宙線を検出するために放射線検出器が搭載されている。そして、従来、この天文衛星に搭載された放射線検出器には、図１２に示すような波状に成形された薄板１を複数枚並べて構成した放射線コリメータ２が利用されていた。 For example, radiation detectors are mounted on astronomical satellites to detect cosmic rays such as X-rays. Conventionally, the radiation detector mounted on this astronomical satellite has used a radiation collimator 2 in which a plurality of thin plates 1 formed in a wave shape as shown in FIG. 12 are arranged.

また、特許文献１に開示されている放射線検出器では、図１３に示すように１００μｍ程度の厚さの薄板に直径が１０ｎｍ〜１０μｍの微小な貫通孔３をフォトリソ（エッチング）工程により形成した放射線コリメータ４が利用されている。また、このような貫通孔２が形成された極薄板を複数枚積み上げることによって放射線コリメータを構成する手法も考えられている。なお、図１３において、５は放射線検出部である。 Further, in the radiation detector disclosed in Patent Document 1, as shown in FIG. 13, radiation in which a minute through hole 3 having a diameter of 10 nm to 10 μm is formed in a thin plate having a thickness of about 100 μm by a photolithography (etching) process. A collimator 4 is used. In addition, a method of configuring a radiation collimator by stacking a plurality of ultrathin plates having such through holes 2 is also considered. In FIG. 13, reference numeral 5 denotes a radiation detection unit.

国際公開第Ｗ０２００６／０９０５９５号パンフレットInternational Publication No. W02006 / 090595 Pamphlet 特開２００２−９０４６３号公報JP 2002-90463 A

図１２に示すような放射線コリメータ２には、波状の薄板１の加工精度が高くないため、大面積化が困難であるという問題がある。
また、図１３に示すような貫通孔２が形成された極薄板を複数枚積み上げるには高精度の積み上げ技術が要求されるため、高アスペクト比化が困難であるという問題がある。 The radiation collimator 2 as shown in FIG. 12 has a problem that it is difficult to increase the area because the processing accuracy of the corrugated thin plate 1 is not high.
Moreover, since a highly accurate stacking technique is required to stack a plurality of ultrathin plates with through holes 2 as shown in FIG. 13, there is a problem that it is difficult to increase the aspect ratio.

従って本発明は上記の事情に鑑み、大面積化と高アスペクト比化とを容易に実現することができる放射線コリメータ及びこれを備えた放射線検出器を提供することを課題とする。 Therefore, in view of the above circumstances, an object of the present invention is to provide a radiation collimator that can easily realize a large area and a high aspect ratio, and a radiation detector including the radiation collimator.

上記課題を解決する第１発明の放射線コリメータは、複数の縦板と複数の横板とを有してなる層を、複数積層してなるものであって、
各縦板は、長さ方向が縦方向となるように配設された帯状の板であって、板幅方向の一端部にはのこぎり歯状の複数の第１の歯が、長さ方向に等間隔に形成され、板幅方向の他端部にはのこぎり歯状の複数の第２の歯が、長さ方向に等間隔で且つ長さ方向の向きが第１の歯と逆向きに形成され、第１の歯の幅と、第２の歯の幅と、第１の歯と第２の歯の間の部分の幅とが等しい形状であり、
各横板は、長さ方向が横方向となり縦板に直交するように配設された帯状の板であって、板幅方向の一端部にはのこぎり歯状の複数の第１の歯が、長さ方向に等間隔に形成され、板幅方向の他端部にはのこぎり歯状の複数の第２の歯が、長さ方向に等間隔で且つ長さ方向の向きが第１の歯と逆向きに形成され、第１の歯の幅と、第２の歯の幅と、第１の歯と第２の歯の間の部分の幅とが等しい形状であり、
各層は何れも、等間隔に配設された複数枚の縦板と、これらの縦板の上に等間隔で配設された複数枚の横板とを有し、且つ、縦板の第２の歯の間の谷底部と、横板の第１の歯の間の谷底部とを係合させた構成であり、
隣接する上下の層の縦板同士は、下層の縦板の第２の歯と、上層の縦板の第１の歯とが噛み合い、且つ、この噛み合っている第１の歯の板幅方向に沿う面と、第２の歯の板幅方向に沿う面とによって、下層の横板の第１の歯と第２の歯の間の部分を挾持しており、
隣接する上下の層の横板同士は、下層の横板の第２の歯と、上層の横板の第１の歯とが噛み合い、且つ、この噛み合っている第１の歯の板幅方向に沿う面と、第２の歯の板幅方向に沿う面とによって、上層の縦板の第１の歯と第２の歯の間の部分を挾持しており、
縦板と横板で構成された矩形の貫通孔が縦横に複数配列されて、格子状を成していることを特徴とする。 The radiation collimator of the first invention that solves the above problems is formed by laminating a plurality of layers each having a plurality of vertical plates and a plurality of horizontal plates,
Each vertical plate is a strip-shaped plate arranged such that the length direction is the vertical direction, and a plurality of sawtooth-shaped first teeth are provided in the length direction at one end in the plate width direction. A plurality of sawtooth-shaped second teeth are formed at equal intervals at the other end in the plate width direction, and are formed at equal intervals in the length direction and in the direction opposite to the first teeth in the length direction. The width of the first tooth, the width of the second tooth, and the width of the portion between the first tooth and the second tooth are equal,
Each horizontal plate is a strip-shaped plate that is arranged so that its length direction is horizontal and perpendicular to the vertical plate, and a plurality of sawtooth-shaped first teeth are provided at one end in the plate width direction. A plurality of sawtooth-shaped second teeth are formed at equal intervals in the length direction, and a plurality of sawtooth-shaped second teeth are arranged at equal intervals in the length direction and the first direction is in the length direction. Formed in the opposite direction, the width of the first tooth, the width of the second tooth, and the width of the portion between the first tooth and the second tooth are equal,
Each layer has a plurality of vertical plates arranged at equal intervals, and a plurality of horizontal plates arranged at equal intervals on these vertical plates, and the second of the vertical plates. The valley bottom between the teeth and the valley bottom between the first teeth of the horizontal plate,
The adjacent vertical plates of the upper and lower layers are meshed with the second teeth of the lower vertical plate and the first teeth of the upper vertical plate, and in the width direction of the meshed first teeth. The surface between the first tooth and the second tooth of the lower lateral plate is held by the surface along the surface along the plate width direction of the second tooth,
The adjacent horizontal plates of the upper and lower layers are meshed with the second teeth of the lower horizontal plate and the first teeth of the upper horizontal plate, and in the width direction of the meshed first teeth. The portion between the first tooth and the second tooth of the upper vertical plate is held by the surface along the surface along the plate width direction of the second tooth,
A plurality of rectangular through-holes composed of vertical and horizontal plates are arranged vertically and horizontally to form a lattice shape.

また、第２発明の放射線コリメータは、第１発明の放射線コリメータにおいて、
直方体状の筒体であるガイドフレームを有し、
ガイドフレームの内側の一対の対向面には、複数の縦板用溝が等間隔に対向して形成され、且つ、ガイドフレームの内側の他の一対の対向面には、複数の横板用溝が等間隔に対向して形成されており、
縦板用溝には縦板の両端部が嵌め込まれ、横板用溝には横板の両端部がはめ込まれていることを特徴とする。 The radiation collimator of the second invention is the radiation collimator of the first invention,
It has a guide frame that is a rectangular parallelepiped cylinder,
A plurality of vertical plate grooves are formed at equal intervals on the pair of opposed surfaces inside the guide frame, and a plurality of horizontal plate grooves are formed on the other pair of opposed surfaces inside the guide frame. Are formed at equal intervals,
Both ends of the vertical plate are fitted into the vertical plate groove, and both ends of the horizontal plate are fitted into the horizontal plate groove.

また、第３発明の放射線検出器は、第１又は第２発明の放射線コリメータと、
この放射線コリメータの深さ方向の一端側に配置された放射線検出部と、
を有することを特徴とする。 The radiation detector of the third invention comprises the radiation collimator of the first or second invention,
A radiation detector disposed on one end side in the depth direction of the radiation collimator;
It is characterized by having.

第１発明の放射線コリメータによれば、複数の縦板と複数の横板とを有してなる層を、複数積層してなるものであって、各縦板は、長さ方向が縦方向となるように配設された帯状の板であって、板幅方向の一端部にはのこぎり歯状の複数の第１の歯が、長さ方向に等間隔に形成され、板幅方向の他端部にはのこぎり歯状の複数の第２の歯が、長さ方向に等間隔で且つ長さ方向の向きが第１の歯と逆向きに形成され、第１の歯の幅と、第２の歯の幅と、第１の歯と第２の歯の間の部分の幅とが等しい形状であり、各横板は、長さ方向が横方向となり縦板に直交するように配設された帯状の板であって、板幅方向の一端部にはのこぎり歯状の複数の第１の歯が、長さ方向に等間隔に形成され、板幅方向の他端部にはのこぎり歯状の複数の第２の歯が、長さ方向に等間隔で且つ長さ方向の向きが第１の歯と逆向きに形成され、第１の歯の幅と、第２の歯の幅と、第１の歯と第２の歯の間の部分の幅とが等しい形状であり、各層は何れも、等間隔に配設された複数枚の縦板と、これらの縦板の上に等間隔で配設された複数枚の横板とを有し、且つ、縦板の第２の歯の間の谷底部と、横板の第１の歯の間の谷底部とを係合させた構成であり、隣接する上下の層の縦板同士は、下層の縦板の第２の歯と、上層の縦板の第１の歯とが噛み合い、且つ、この噛み合っている第１の歯の板幅方向に沿う面と、第２の歯の板幅方向に沿う面とによって、下層の横板の第１の歯と第２の歯の間の部分を挾持しており、隣接する上下の層の横板同士は、下層の横板の第２の歯と、上層の横板の第１の歯とが噛み合い、且つ、この噛み合っている第１の歯の板幅方向に沿う面と、第２の歯の板幅方向に沿う面とによって、上層の縦板の第１の歯と第２の歯の間の部分を挾持しており、縦板と横板で構成された矩形の貫通孔が縦横に複数配列されて、格子状を成していることを特徴としており、従来の方式に比べて、のこぎり歯状の第１の歯と第２の歯を有する縦板と横板を積層する単純な構造であるため、大面積化と高アスペクト比化を容易に達成することができる。
また、横板の第１の歯と第２の歯がのこぎり歯状になっているため、下層の横板の第２の歯と上層の横板の第１の歯とを噛み合わせる際には、上層の横板を斜めに移動させて、下層の横板の第２の歯に上層の横板の第１の歯を噛み合わせることができる。
同様に、縦板の第１の歯と第２の歯がのこぎり歯状になっているため、下層の縦板の第２の歯と上層の縦板の第１の歯とを噛み合わせる際には、上層の縦板を斜めに移動させて、下層の縦板の第２の歯に上層の縦板の第１の歯を噛み合わせることができる。
このため、矩形状の歯同士を噛み合わせるような場合に比べて、容易且つ確実に積層作業を行うことができ、上下の縦板の歯で横板を挟むことや、上下の横板の歯で縦板を挟むことも容易且つ確実に行うことができる。
また、縦板や横板の加工は、簡易な同一形状のプレス加工金型のみを用いたプレス加工によって行うことができるため、低コスト化を図ることもできる。 According to the radiation collimator of the first invention, a plurality of layers each including a plurality of vertical plates and a plurality of horizontal plates are laminated, and each vertical plate has a longitudinal direction as a vertical direction. A plurality of sawtooth-shaped first teeth are formed at equal intervals in the length direction at one end in the plate width direction, and the other end in the plate width direction. A plurality of sawtooth-shaped second teeth are formed at equal intervals in the length direction and in the length direction opposite to the first teeth, and the width of the first teeth, The width of each tooth is equal to the width of the portion between the first tooth and the second tooth, and each horizontal plate is disposed so that its length direction is horizontal and perpendicular to the vertical plate. A plurality of sawtooth-shaped first teeth are formed at one end in the plate width direction at equal intervals in the length direction, and a sawtooth shape is formed at the other end in the plate width direction. A plurality of second teeth The first tooth is formed at equal intervals in the length direction and the direction of the length direction is opposite to that of the first tooth. The width of the first tooth, the width of the second tooth, the first tooth, and the second tooth The width of the portion between the teeth is the same shape, and each layer has a plurality of vertical plates arranged at equal intervals, and a plurality of sheets arranged at equal intervals on these vertical plates. The upper and lower layers adjacent to each other, and a valley bottom between the second teeth of the vertical plate and a valley bottom between the first teeth of the horizontal plate. The vertical plates of the lower plate are engaged with the second teeth of the lower vertical plate and the first teeth of the upper vertical plate, and the surface along the plate width direction of the engaged first teeth, The surface along the plate width direction of the two teeth holds the portion between the first tooth and the second tooth of the lower horizontal plate, and the adjacent horizontal plates of the upper and lower layers are The second tooth of the horizontal plate and the first tooth of the upper horizontal plate bite The first tooth of the upper vertical plate and the second tooth of the upper tooth are formed by the surface along the plate width direction of the meshed first teeth and the surface along the plate width direction of the second teeth. It is characterized by holding a part in between, and a plurality of rectangular through-holes composed of vertical and horizontal plates arranged vertically and horizontally, forming a lattice shape, compared to the conventional method, Since it has a simple structure in which a vertical plate and a horizontal plate having sawtooth-shaped first teeth and second teeth are laminated, a large area and a high aspect ratio can be easily achieved.
Further, since the first and second teeth of the horizontal plate are sawtooth-shaped, when the second teeth of the lower horizontal plate and the first teeth of the upper horizontal plate are engaged with each other, By moving the upper horizontal plate obliquely, the first teeth of the upper horizontal plate can be engaged with the second teeth of the lower horizontal plate.
Similarly, since the first tooth and the second tooth of the vertical plate are sawtooth-shaped, when meshing the second tooth of the lower vertical plate and the first tooth of the upper vertical plate Can move the upper vertical plate diagonally to mesh the first teeth of the upper vertical plate with the second teeth of the lower vertical plate.
For this reason, it is possible to perform the laminating operation more easily and reliably than in the case where the teeth of the rectangular shape are engaged with each other, and the horizontal plate is sandwiched between the upper and lower vertical plate teeth or the upper and lower horizontal plate teeth. Therefore, the vertical plate can be easily and reliably sandwiched.
In addition, since the processing of the vertical plate and the horizontal plate can be performed by press processing using only a simple pressing mold having the same shape, the cost can be reduced.

第２発明の放射線コリメータによれば、第１発明の放射線コリメータにおいて、直方体状の筒体であるガイドフレームを有し、ガイドフレームの内側の一対の対向面には、複数の縦板用溝が等間隔に対向して形成され、且つ、ガイドフレームの内側の他の一対の対向面には、複数の横板用溝が等間隔に対向して形成されており、縦板用溝には縦板の両端部が嵌め込まれ、横板用溝には横板の両端部がはめ込まれていることを特徴としているため、簡易な構成で確実に縦板と横板を支持することができる。 According to the radiation collimator of the second invention, in the radiation collimator of the first invention, the radiation collimator has a guide frame which is a rectangular parallelepiped cylinder, and a plurality of vertical plate grooves are formed on a pair of opposed surfaces inside the guide frame. A plurality of horizontal plate grooves are formed at equal intervals on the other pair of opposing surfaces inside the guide frame, and are formed at equal intervals. Since both ends of the plate are fitted and both ends of the horizontal plate are fitted in the groove for the horizontal plate, the vertical plate and the horizontal plate can be reliably supported with a simple configuration.

第３発明の放射線検出器によれば、第１又は第２発明の放射線コリメータと、この放射線コリメータの深さ方向の一端側に配置された放射線検出部とを有することを特徴としているため、大面積化や高アスペクト比化などが可能な放射線コリメータを用いた高性能の放射線検出器を実現することができる。 According to the radiation detector of the third aspect of the invention, the radiation detector includes the radiation collimator of the first or second aspect of the invention and a radiation detection unit disposed on one end side in the depth direction of the radiation collimator. A high-performance radiation detector using a radiation collimator that can be increased in area, increased in aspect ratio, and the like can be realized.

本発明の実施の形態例に放射線コリメータの斜視図である。It is a perspective view of a radiation collimator in an example of an embodiment of the invention. （ａ）は放射線コリメータを構成する薄板の側面図、（ｂ）は（ａ）のＡ部拡大図、（ｃ）は（ｂ）のＢ１方向矢視図、（ｄ）は（ｂ）のＢ２方向矢視図である。(A) is a side view of a thin plate constituting the radiation collimator, (b) is an enlarged view of a part A of (a), (c) is a view taken in the direction of arrow B1 in (b), and (d) is B2 in (b). FIG. 薄板の加工方法を説明する図である。It is a figure explaining the processing method of a thin plate. （ａ）は放射線コリメータの一部（縦板と横板の積層状態）を示す側面図、（ｂ）は（ａ）のＣ方向矢視図である。(A) is a side view which shows a part of radiation collimator (lamination state of a vertical plate and a horizontal plate), (b) is a C direction arrow view of (a). （ａ）は図４（ａ）のＤ部拡大図、（ｂ）は上下の層の横板の歯同士を噛み合わせるときの状態を示す図である。(A) is the D section enlarged view of Drawing 4 (a), and (b) is a figure showing the state when meshing the teeth of the horizontal board of the upper and lower layers. （ａ）は図４（ｂ）のＦ部拡大図、（ｂ）は上下の層の縦板の歯同士を噛み合わせるときの状態を示す図である。(A) is the F section enlarged view of FIG.4 (b), (b) is a figure which shows a state when mesh | engaging the teeth of the vertical board of an upper and lower layer. 放射線コリメータのガイドフレームの平面図である。It is a top view of the guide frame of a radiation collimator. ガイドフレームに縦板を嵌め込んだ状態を示す図である。It is a figure which shows the state which fitted the vertical board in the guide frame. ガイドフレームに縦板と横板を嵌め込んだ状態を示す図である。It is a figure which shows the state which fitted the vertical board and the horizontal board to the guide frame. 本発明の実施の形態例に係る放射線検出器の斜視図である。It is a perspective view of a radiation detector concerning an embodiment of the present invention. 放射線検出器を構成する放射線検出部の斜視図である。It is a perspective view of the radiation detection part which comprises a radiation detector. 従来例の放射線コリメータの斜視図である。It is a perspective view of the radiation collimator of a prior art example. 他の従来例の放射線コリメータの斜視図である。It is a perspective view of the radiation collimator of another conventional example.

以下、本発明の実施の形態例を図面に基づいて詳細に説明する。 Embodiments of the present invention will be described below in detail with reference to the drawings.

図１（ａ）及び図１（ｂ）に示すように、本発明の実施の形態例に係る放射線コリメータ１１は縦板１２と横板１３とガイドフレーム１４とを有してなるものであり、全体的な形状が直方体状のものである。 As shown in FIGS. 1A and 1B, a radiation collimator 11 according to an embodiment of the present invention includes a vertical plate 12, a horizontal plate 13, and a guide frame 14. The overall shape is a rectangular parallelepiped.

ガイドフレーム１４は縦板１２と横板１３を支持する直方体状の筒体であり、深さ方向（図１（ａ）の上下方向）の両端が開口している。ガイドフレーム１４の内側では、積層した縦板１２と横板１３で構成されて深さ方向に延びている矩形（正方形）の貫通孔１５が、縦横に多数配列されて、格子状を成している。
そして、この放射線コリメータ１１は、各貫通孔１５の一辺の長さＬ１（例えば２ｍｍ）と、各１４の深さ方向の長さＬ２（例えば２００ｍｍ）との比であるアスペクト比（Ｌ１：Ｌ２）が、１：１００程度になっており、高アスペクト比化を実現している。また、この放射線コリメータ１１は、一辺の長さＬ３が例えば１００ｍｍ程度のものであり、大面積化も実現している。
各貫通孔１５に入射したＸ線等の放射線は、各貫通孔１５でコリメートされて各孔１５から出射される。また、各貫通孔１５は高いアスペクト比を有しているため、放射線の検出の邪魔になる可視光などが各貫通孔１５に入射しても、この可視光などは途中で減衰してしまうため、各貫通孔１５から出射されない。 The guide frame 14 is a rectangular parallelepiped cylindrical body that supports the vertical plate 12 and the horizontal plate 13, and both ends in the depth direction (vertical direction in FIG. 1A) are open. Inside the guide frame 14, a plurality of rectangular (square) through-holes 15, which are composed of stacked vertical plates 12 and horizontal plates 13 and extend in the depth direction, are arranged vertically and horizontally to form a lattice shape. Yes.
The radiation collimator 11 has an aspect ratio (L1: L2) that is a ratio of the length L1 (for example, 2 mm) of one side of each through-hole 15 to the length L2 (for example, 200 mm) of each 14 depth direction. However, it is about 1: 100, and a high aspect ratio is realized. The radiation collimator 11 has a side length L3 of about 100 mm, for example, and realizes a large area.
Radiation such as X-rays incident on each through hole 15 is collimated at each through hole 15 and emitted from each hole 15. Moreover, since each through-hole 15 has a high aspect ratio, even if visible light or the like that interferes with radiation detection is incident on each through-hole 15, this visible light or the like is attenuated on the way. The light is not emitted from each through hole 15.

図２（ａ），図２（ｂ），図２（ｃ）及び図２（ｄ）に示すように、縦板１２と横板１３は同一形状のものであり、厚みの薄い帯状の板（薄板）である。即ち、同一形状の薄板を多数製作して、これらの薄板を縦板１２と横板１３とに利用している。 2 (a), 2 (b), 2 (c), and 2 (d), the vertical plate 12 and the horizontal plate 13 have the same shape, and are thin strip plates ( Thin plate). That is, a large number of thin plates having the same shape are manufactured, and these thin plates are used as the vertical plate 12 and the horizontal plate 13.

縦板１２は、縦板１２の板幅方向（矢印Ｉ方向：以下、単に板幅方向と称する）の一端部に複数の第１の歯１２Ａが、縦板１２の長さ方向（矢印Ｊ方向：以下、単に長さ方向と称する）に等間隔（Ｌ８）に形成され、板幅方向の他端部に複数の第２の歯１２Ｂが、長さ方向に等間隔（Ｌ８）に形成されている。 The vertical plate 12 has a plurality of first teeth 12A at one end in the plate width direction of the vertical plate 12 (arrow I direction: hereinafter simply referred to as plate width direction), and the length direction of the vertical plate 12 (arrow J direction). : Hereinafter simply referred to as the length direction) at equal intervals (L8), and a plurality of second teeth 12B are formed at the other end in the plate width direction at equal intervals (L8). Yes.

また、第１の歯１２Ａと第２の歯１２Ｂは、長さ方向の向きが互いに逆向きとなるように形成されている。
即ち、第１の歯１２Ａはのこぎり歯状であり、板幅方向に沿う面１２Ａ−１と、板幅方向に対して傾斜している面１２Ａ−２とを有している。第２の歯１２Ｂものこぎり歯状であり、板幅方向に沿う面１２Ｂ−１と、板幅方向に対して傾斜している面１２Ｂ−２とを有している。そして、第１の歯１２Ａは板幅方向に沿う面１２Ａ−１が長さ方向の左側に位置し、板幅方向に対して傾斜している面１２Ａ−２が長さ方向の右側に位置しているのに対して、第２の歯１２Ｂは板幅方向に沿う面１２Ｂ−１が長さ方向の右側に位置し、板幅方向に対して傾斜している面１２Ｂ−２が長さ方向の左側に位置している。 Further, the first teeth 12A and the second teeth 12B are formed so that the lengthwise directions are opposite to each other.
That is, the first tooth 12A has a sawtooth shape, and has a surface 12A-1 along the plate width direction and a surface 12A-2 inclined with respect to the plate width direction. The second tooth 12B has a sawtooth shape, and has a surface 12B-1 along the plate width direction and a surface 12B-2 inclined with respect to the plate width direction. The first tooth 12A has a surface 12A-1 along the plate width direction located on the left side in the length direction, and a surface 12A-2 inclined with respect to the plate width direction located on the right side in the length direction. On the other hand, in the second tooth 12B, the surface 12B-1 along the plate width direction is located on the right side in the length direction, and the surface 12B-2 inclined with respect to the plate width direction is in the length direction. Located on the left side of.

更に、縦板１２は、第１の歯１２Ａの幅Ｌ４と、第２の歯１２Ｂの幅Ｌ５と、第１の歯１２Ａと第２の歯１２Ｂの間の部分１２Ｃの幅Ｌ６とが等しい形状となっている。
また、第１の歯１２Ａの間の谷底部１２Ｄは、その長さ方向の幅Ｌ９が、横板１３の板厚Ｌ７と、第２の歯１２Ｂの先端部１２Ｇの長さ方向の幅Ｌ１０とを合わせた幅になっている。第２の歯１２Ｂの間の谷底部１２Ｅも、その長さ方向の幅Ｌ１１が、横板１３の板厚Ｌ７と、第１の歯１２Ａの先端部１２Ｆの長さ方向の幅Ｌ１２とを合わせた幅になっている。なお、Ｌ９＝Ｌ１１、Ｌ１０＝Ｌ１２である。
なお、図示は省略するが、谷底部１２Ｄ，１２Ｅがプレス加工（詳細後述）の際に円みおびた形状にならなうようするために、谷底部１２Ｄ，１２Ｅの両側にＲを設けるようにしてもよい。 Further, the vertical plate 12 has a shape in which the width L4 of the first tooth 12A, the width L5 of the second tooth 12B, and the width L6 of the portion 12C between the first tooth 12A and the second tooth 12B are equal. It has become.
Further, the valley bottom portion 12D between the first teeth 12A has a width L9 in the length direction, a plate thickness L7 of the horizontal plate 13, and a width L10 in the length direction of the tip portion 12G of the second tooth 12B. The combined width. The valley bottom portion 12E between the second teeth 12B also has a width L11 in the length direction that matches the plate thickness L7 of the lateral plate 13 and the width L12 in the length direction of the tip portion 12F of the first tooth 12A. It is wide. Note that L9 = L11 and L10 = L12.
Although not shown in the drawings, R is provided on both sides of the valley bottom portions 12D and 12E so that the valley bottom portions 12D and 12E have a rounded shape during press working (details will be described later). May be.

横板１３も、縦板１２と同様の形状である。
即ち、横板１３は、横板１３の板幅方向の一端部に複数の第１の歯１３Ａが、横板１３の長さ方向に等間隔（Ｌ８）に形成され、板幅方向の他端部に複数の第２の歯１３Ｂが、長さ方向に等間隔（Ｌ８）に形成されている。 The horizontal plate 13 has the same shape as the vertical plate 12.
That is, the horizontal plate 13 has a plurality of first teeth 13A formed at one end in the plate width direction of the horizontal plate 13 at equal intervals (L8) in the length direction of the horizontal plate 13, and the other end in the plate width direction. A plurality of second teeth 13B are formed at equal intervals (L8) in the length direction.

また、第１の歯１３Ａと第２の歯１３Ｂは、長さ方向の向きが互いに逆向きになるように形成されている。
即ち、第１の歯１３Ａはのこぎり歯状であり、板幅方向に沿う面１３Ａ−１と、板幅方向に対して傾斜している面１３Ａ−２とを有している。第２の歯１３Ｂものこぎり歯状であり、板幅方向に沿う面１３Ｂ−１と、板幅方向に対して傾斜している面１３Ｂ−２とを有している。そして、第１の歯１３Ａは板幅方向に沿う面１３Ａ−１が長さ方向の左側に位置し、板幅方向に対して傾斜している面１２３−２が長さ方向の右側に位置しているのに対して、第２の歯１３Ｂは板幅方向に沿う面１３Ｂ−１が長さ方向の右側に位置し、板幅方向に対して傾斜している面１３Ｂ−２が長さ方向の左側に位置している。 Further, the first teeth 13A and the second teeth 13B are formed so that the length directions are opposite to each other.
That is, the first tooth 13A has a sawtooth shape, and has a surface 13A-1 along the plate width direction and a surface 13A-2 inclined with respect to the plate width direction. The second tooth 13B has a sawtooth shape, and has a surface 13B-1 along the plate width direction and a surface 13B-2 inclined with respect to the plate width direction. In the first tooth 13A, the surface 13A-1 along the plate width direction is located on the left side in the length direction, and the surface 123-2 inclined with respect to the plate width direction is located on the right side in the length direction. On the other hand, in the second tooth 13B, the surface 13B-1 along the plate width direction is located on the right side in the length direction, and the surface 13B-2 inclined with respect to the plate width direction is in the length direction. Located on the left side of.

更に、縦板１３は、第１の歯１３Ａの幅Ｌ４と、第２の歯１３Ｂの幅Ｌ５と、第１の歯１３Ａと第２の歯１３Ｂの間の部分１３Ｃの幅Ｌ６とが等しい形状となっている。
また、第１の歯１３Ａの間の谷底部１３Ｄは、その長さ方向の幅Ｌ９が、縦板１２の板厚Ｌ７と、第２の歯１３Ｂの先端部１３Ｇの長さ方向の幅Ｌ１０とを合わせた幅になっている。第２の歯１３Ｂの間の谷底部１３Ｅも、その長さ方向の幅Ｌ１１が、縦板１２の板厚Ｌ７と、第１の歯１３Ａの先端部１３Ｆの長さ方向の幅Ｌ１２とを合わせた幅になっている。なお、Ｌ９＝Ｌ１１、Ｌ１０＝Ｌ１２である。
なお、図示は省略するが、谷底部１３Ｄ，１３Ｅがプレス加工（詳細後述）の際に円みおびた形状にならなうようするために、谷底部１２Ｄ，１２Ｅの両側にＲを設けるようにしてもよい。 Further, the vertical plate 13 has a shape in which the width L4 of the first tooth 13A, the width L5 of the second tooth 13B, and the width L6 of the portion 13C between the first tooth 13A and the second tooth 13B are equal. It has become.
Further, the valley bottom portion 13D between the first teeth 13A has a width L9 in the length direction, a plate thickness L7 of the vertical plate 12, and a width L10 in the length direction of the tip portion 13G of the second tooth 13B. The combined width. In the valley bottom portion 13E between the second teeth 13B, the width L11 in the length direction matches the plate thickness L7 of the vertical plate 12 and the width L12 in the length direction of the tip portion 13F of the first tooth 13A. It is wide. Note that L9 = L11 and L10 = L12.
Although not shown, R is provided on both sides of the valley bottom portions 12D and 12E so that the valley bottom portions 13D and 13E have a rounded shape during press working (details will be described later). May be.

縦板１２及び横板１３の寸法例としては、例えば、各幅Ｌ４，Ｌ５，Ｌ６をそれぞれ２ｍｍ、板厚Ｌ７を０．０５ｍｍ、第１の歯１２Ａ，１３Ｂの間隔Ｌ８及び第２の歯１２Ｂ，１３Ｂの間隔Ｌ８を２ｍｍとする。 As an example of the dimensions of the vertical plate 12 and the horizontal plate 13, for example, the widths L4, L5, and L6 are 2 mm, the plate thickness L7 is 0.05 mm, the distance L8 between the first teeth 12A and 13B, and the second teeth 12B. , 13B is set to 2 mm.

次に、図３に基づき、縦板１２及び横板１３の加工方法について説明する。
図３に示すように、薄い帯状の板（薄板）１７を用意し、この薄板１７を長さ方向（矢印Ｇ方向）へ一定の距離ずつ移動する毎に、或いは、その逆方向にプレス加工金型１６を一定の距離ずつ移動する毎に、薄板１７の板幅方向の一端部のプレス加工予定ライン１８に対し、プレス加工金型１６を矢印Ｈの如く板厚方向に移動させてプレス加工（切断）を行なうことにより、薄板１７の板幅方向の一端部に第１の歯１７Ａ（１２Ａ，１３Ａに相当）を形成する。
次に、薄板１７又はプレス加工金型１６の向きをかえ、同様に、薄板１７を長さ方向へ一定の距離ずつ移動する毎に、或いは、その逆方向にプレス加工金型１６を一定の距離ずつ移動する毎に、薄板１７の板幅方向の他端部のプレス加工予定ライン１８に対し、プレス加工金型１６を板幅方向に移動させてプレス加工（切断）を行なうことにより、薄板１７の板幅方向の他端部に第２の歯１７Ｂ（１２Ｂ，１３Ｂに相当）を形成する。 Next, based on FIG. 3, the processing method of the vertical board 12 and the horizontal board 13 is demonstrated.
As shown in FIG. 3, a thin strip-shaped plate (thin plate) 17 is prepared, and each time the thin plate 17 is moved by a certain distance in the length direction (arrow G direction) or in the opposite direction, Each time the die 16 is moved by a certain distance, the press die 16 is moved in the plate thickness direction as indicated by an arrow H with respect to the press-work scheduled line 18 at one end in the plate width direction of the thin plate 17 (see FIG. The first teeth 17A (corresponding to 12A and 13A) are formed at one end of the thin plate 17 in the plate width direction.
Next, the direction of the thin plate 17 or the press working die 16 is changed. Similarly, every time the thin plate 17 is moved by a certain distance in the length direction, or in the opposite direction, the pressing die 16 is moved by a certain distance. Each time the sheet 17 is moved, the pressing plate 16 is moved in the sheet width direction and pressed (cut) with respect to the line 18 to be pressed at the other end of the sheet 17 in the sheet width direction. Second teeth 17B (corresponding to 12B and 13B) are formed at the other end in the plate width direction.

こうして第１の歯１７Ａと第２の歯１７Ｂが形成された薄板１７は、その半分が、長さ方向が縦方向となるように配設される縦板１２として利用され、残り半分が、長さ方向が横方向となり縦板に直交するように配設される横板１３として利用される。 Half of the thin plate 17 on which the first teeth 17A and the second teeth 17B are thus formed is used as the vertical plate 12 disposed so that the length direction is the vertical direction, and the other half is the long plate. The horizontal plate 13 is used as a horizontal plate 13 that is disposed so that its vertical direction is a horizontal direction and is orthogonal to the vertical plate.

薄板１７（縦板１２及び横板１３）の材料としては、Ｘ線等の高エネルギーの放射線に対して、数ｍｍ以下の板厚で十分な遮蔽能力を持つ材料が望ましく、例えば、タングステン（Ｗ）、銅タングステン（Ｃｕ-Ｗ）、鉛（Ｐｂ）、リン青銅（Ｃｕ＋Ｓｎ＋Ｐ）、高密度タングステン合金（ヘビーアロイ）等を用いることができる。ヘビーアロイは、タングステン（Ｗ）を主成分とし、バインダー層をニッケル（Ｎｉ）、銅（Ｃｕ）、鉄（Ｆｅ）などで構成したタングステン基焼結合金である。なお、プレス加工における加工性を考慮した場合、リン青銅（Ｃｕ＋Ｓｎ＋Ｐ）が、薄板１７（縦板１２及び横板１３）の材料として最適である。
また、ガイドフレーム１５にも、薄板１７（縦板１２及び横板１３）と同様の材料を用いることができる。 The material of the thin plate 17 (vertical plate 12 and horizontal plate 13) is preferably a material having a sufficient shielding ability with a plate thickness of several mm or less against high-energy radiation such as X-rays, for example, tungsten (W ), Copper tungsten (Cu—W), lead (Pb), phosphor bronze (Cu + Sn + P), high-density tungsten alloy (heavy alloy), or the like. Heavy alloy is a tungsten-based sintered alloy mainly composed of tungsten (W) and having a binder layer made of nickel (Ni), copper (Cu), iron (Fe), or the like. In consideration of workability in press working, phosphor bronze (Cu + Sn + P) is optimal as a material for the thin plate 17 (vertical plate 12 and horizontal plate 13).
The guide frame 15 can also be made of the same material as the thin plate 17 (the vertical plate 12 and the horizontal plate 13).

そして、本実施の形態例の放射線コリメータ１１は、ガイドフレーム１５の内側に複数の縦板１２と複数の横板１３とを有してなる層を、複数積層した構造となっている。 The radiation collimator 11 according to the present embodiment has a structure in which a plurality of layers each having a plurality of vertical plates 12 and a plurality of horizontal plates 13 are laminated inside the guide frame 15.

この積層構造を、図４（ａ），図４（ｂ），図５（ａ），図５（ｂ），図６（ａ）及び図６（ｂ）に基づいて説明する。但し、図４（ａ）及び図４（ｂ）には第１層２１〜第２５層２５までの５層分の積層構造を示しているが、放射線コリメータ全体では、所定のアスペクト比が得られるように更に多層の積層構造となっており、何れの層も同様の構造となっている。
なお、説明の便宜上、隣接する層（例えば第１層２１と第２層２２や、第２層２２と第３層２３など）のうち、放射線コリメータ１１の基端側（放射線の出射側）の層を下層、放射線コリメータ１１の先端側（放射線の入射側）の層を上層と称する。 This laminated structure will be described with reference to FIGS. 4 (a), 4 (b), 5 (a), 5 (b), 6 (a) and 6 (b). However, although FIG. 4A and FIG. 4B show a laminated structure for five layers from the first layer 21 to the 25th layer 25, the radiation collimator as a whole can obtain a predetermined aspect ratio. Thus, it has a multilayer structure, and all the layers have the same structure.
For convenience of explanation, of adjacent layers (for example, the first layer 21 and the second layer 22, the second layer 22 and the third layer 23, etc.) on the proximal end side (radiation emission side) of the radiation collimator 11 The layer is referred to as a lower layer, and the layer on the tip side (radiation incident side) of the radiation collimator 11 is referred to as an upper layer.

図４（ａ），図４（ｂ），図５（ａ），図５（ｂ），図６（ａ）及び図６（ｂ）に示すように、第１層２１〜第５層２５の各層は何れも、等間隔に配設された複数枚（図示例では５４枚）の縦板１２と、これらの縦板１２の上に等間隔で配設された複数枚（図示例では５４枚）の横板１３とを有している。
縦板１２は、その長さ方向が縦方向（図４（ｂ）の左右方向）となるように配設されている。横板１３は、その長さ方向が横方向（図４（ａ）の左右方向）となり、縦板１２に対して直交するように配設されている。
しかも、縦板１２の第２の歯１２Ｂの間の谷底部１２Ｅと、横板１３の第１の歯１３Ａの間の谷底部１３Ｄとを係合させた（噛み合わせた）構成となっている。 As shown in FIG. 4A, FIG. 4B, FIG. 5A, FIG. 5B, FIG. 6A and FIG. 6B, the first layer 21 to the fifth layer 25 Each layer has a plurality (54 in the illustrated example) of vertical plates 12 arranged at equal intervals, and a plurality (54 in the illustrated example) disposed on these vertical plates 12 at equal intervals. ) Horizontal plate 13.
The longitudinal plate 12 is disposed so that the length direction thereof is the longitudinal direction (the left-right direction in FIG. 4B). The horizontal plate 13 is disposed so that the length direction thereof is the horizontal direction (the left-right direction in FIG. 4A) and is orthogonal to the vertical plate 12.
In addition, the bottom 12E between the second teeth 12B of the vertical plate 12 and the bottom 13D between the first teeth 13A of the horizontal plate 13 are engaged (engaged). .

また、隣接する上下の層（例えば第１層２１と第２層２２や、第２層２２と第３層２３など）の横板１３同士は、下層（例えば第１層２１と第２層２２では第１層２１、第２層２２と第３層２３では第２層２２）の横板１３の第２の歯１３Ｂと、上層（例えば第１層２１と第２層２２では第２層２２、第２層２２と第３層２３では第３層２３）の横板１３の第１の歯１３Ａとが噛み合っている。
しかも、この噛み合っている下層の横板１３の第２の歯１３Ｂの板幅方向に沿う面１３Ｂ−１と、上層の横板１３の第１の歯１３Ａの板幅方向に沿う面１３Ａ−１とによって、上層の縦板１２の第１の歯１２Ａと第２の歯１２Ｂの間の部分１２Ｃを挾持している。 Further, the horizontal plates 13 of the adjacent upper and lower layers (for example, the first layer 21 and the second layer 22, the second layer 22 and the third layer 23, etc.) are lower layers (for example, the first layer 21 and the second layer 22). In the first layer 21, the second tooth 13B of the horizontal plate 13 of the second layer 22 and the second layer 22 and the third layer 23, and the upper layer (for example, the first layer 21 and the second layer 22, the second layer 22). In the second layer 22 and the third layer 23, the first teeth 13A of the horizontal plate 13 of the third layer 23) are engaged with each other.
Moreover, the surface 13B-1 along the plate width direction of the second teeth 13B of the lower horizontal plate 13 and the surface 13A-1 along the plate width direction of the first teeth 13A of the upper horizontal plate 13 are engaged. Thus, the portion 12C between the first tooth 12A and the second tooth 12B of the upper vertical plate 12 is held.

このとき、下層の横板１３の第２の歯１３Ｂの間の谷底部１３Ｅの幅Ｌ１１が、上層の縦板１２の板厚Ｌ７と上層の横板１３の第１の歯１３Ａの先端部１３Ｆの幅Ｌ１２とを合わせた幅になっているため、図５（ａ）に示すように、上層の縦板１２の第１の歯１２Ａと第２の歯１２Ｂの間の部分１２Ｃと上層の横板１３の第１の歯１３Ａの先端部１３Ｆとが、下層の横板１３の第２の歯１３Ｂの間の谷底部１３Ｅに嵌り込んでいる。
また、上層の横板１３の第１の歯１３Ｂの間の谷底部１３Ｄの幅Ｌ９が、上層の縦板１２の板厚Ｌ７と下層の横板１３の第２の歯１３Ｂの先端部１３Ｇの幅Ｌ１０とを合わせた幅になっているため、図５（ａ）に示すように、上層の縦板１２の第１の歯１２Ａと第２の歯１２Ｂの間の部分１２Ｃと下層の横板１３の第２の歯１３Ｂの先端部１３Ｇとが、上層の横板１３の第１の歯１３Ｂの間の谷底部１３Ｄに嵌り込んでいる。 At this time, the width L11 of the valley bottom portion 13E between the second teeth 13B of the lower horizontal plate 13 is equal to the plate thickness L7 of the upper vertical plate 12 and the tip portion 13F of the first tooth 13A of the upper horizontal plate 13. As shown in FIG. 5 (a), the portion 12C between the first tooth 12A and the second tooth 12B of the upper layer vertical plate 12 and the side of the upper layer are formed. The tip portion 13F of the first tooth 13A of the plate 13 is fitted in the valley bottom portion 13E between the second teeth 13B of the lower horizontal plate 13.
Further, the width L9 of the valley bottom portion 13D between the first teeth 13B of the upper horizontal plate 13 is such that the plate thickness L7 of the upper vertical plate 12 and the tip portion 13G of the second tooth 13B of the lower horizontal plate 13 are the same. Since the width is combined with the width L10, as shown in FIG. 5A, the portion 12C between the first tooth 12A and the second tooth 12B of the upper vertical plate 12 and the lower horizontal plate The tip portions 13G of the 13 second teeth 13B are fitted into the valley bottom portions 13D between the first teeth 13B of the upper horizontal plate 13.

なお、下層の横板１３の第２の歯１３Ｂと上層の横板１３の第１の歯１３Ａとを噛み合わせる際には、これらの歯１３Ａ，１３Ｂがのこぎり歯状になっているため、図５（ｂ）に矢印Ｋで示すように、上層の横板１３を斜めに移動させて、下層の横板１３の第２の歯１３Ｂに上層の横板１３の第１の歯１３Ａを噛み合わせることができる。 When the second teeth 13B of the lower horizontal plate 13 and the first teeth 13A of the upper horizontal plate 13 are engaged with each other, these teeth 13A and 13B are in a sawtooth shape. As indicated by an arrow K in FIG. 5B, the upper horizontal plate 13 is moved obliquely so that the second teeth 13B of the lower horizontal plate 13 mesh with the first teeth 13A of the upper horizontal plate 13. be able to.

同様に、隣接する上下の層（例えば第１層２１と第２層２２や、第２層２２と第３層２３など）の縦板１２同士は、下層（例えば第１層２１と第２層２２では第１層２１、第２層２２と第３層２３では第２層２２）の縦板１２の第２の歯１２Ｂと、上層（例えば第１層２１と第２層２２では第２層２２、第２層２２と第３層２３では第３層２３）の縦板１２の第１の歯１２Ａとが噛み合っている。
しかも、この噛み合っている下層の縦板１２の第２の歯１２Ｂの板幅方向に沿う面１２Ｂ−１と、上層の縦板１２の第１の歯１２Ａの板幅方向に沿う面１２Ａ−１とによって、下層の横板１３の第１の歯１３Ａと第２の歯１３Ｂの間の部分１３Ｃを挾持している。 Similarly, the vertical plates 12 of adjacent upper and lower layers (for example, the first layer 21 and the second layer 22 and the second layer 22 and the third layer 23) are lower layers (for example, the first layer 21 and the second layer). 22, the second tooth 12 </ b> B of the vertical plate 12 of the first layer 21, and the second layer 22 and the second layer 22 in the second layer 22 and the upper layer (for example, the first layer 21 and the second layer 22 are the second layer). 22, the second layer 22 and the third layer 23 mesh with the first teeth 12A of the vertical plate 12 of the third layer 23).
Moreover, the surface 12B-1 along the plate width direction of the second tooth 12B of the lower vertical plate 12 engaged with the surface 12A-1 along the plate width direction of the first tooth 12A of the upper vertical plate 12 is engaged. Thus, the portion 13C between the first tooth 13A and the second tooth 13B of the lower horizontal plate 13 is held.

このとき、下層の縦板１２の第２の歯１２Ｂの間の谷底部１２Ｅの幅Ｌ１１が、下層の横板１３の板厚Ｌ７と上層の縦板１２の第１の歯１２Ａの先端部１２Ｆの幅Ｌ１２とを合わせた幅になっているため、図６（ａ）に示すように、下層の横板１３の第１の歯１３Ａと第２の歯１３Ｂの間の部分１３Ｃと上層の縦板１２の第１の歯１２Ａの先端部１２Ｆとが、下層の縦板１２の第２の歯１２Ｂの間の谷底部１２Ｅに嵌り込んでいる。
また、上層の縦板１２の第１の歯１２Ａの間の谷底部１２Ｄの幅Ｌ９が、下層の横板１３の板厚Ｌ７と下層の縦板１２の第２の歯１２Ｂの先端部１２Ｇの幅Ｌ１０とを合わせた幅になっているため、図６（ａ）に示すように、下層の横板１３の第１の歯１３Ａと第２の歯１３Ｂの間の部分１３Ｃと下層の縦板１２の第２の歯１２Ｂの先端部１２Ｇとが、上層の縦板１２の第１の歯１２Ａの間の谷底部１２Ｄに嵌り込んでいる。 At this time, the width L11 of the valley bottom portion 12E between the second teeth 12B of the lower vertical plate 12 is such that the plate thickness L7 of the lower horizontal plate 13 and the tip portion 12F of the first tooth 12A of the upper vertical plate 12 are the same. As shown in FIG. 6 (a), the portion 13C between the first teeth 13A and the second teeth 13B of the lower horizontal plate 13 and the upper layer of the vertical layer L12 are combined. The front end portion 12F of the first tooth 12A of the plate 12 is fitted in the valley bottom portion 12E between the second teeth 12B of the lower vertical plate 12.
Further, the width L9 of the valley bottom 12D between the first teeth 12A of the upper vertical plate 12 is such that the plate thickness L7 of the lower horizontal plate 13 and the tip 12G of the second tooth 12B of the lower vertical plate 12 are the same. Since the width is combined with the width L10, as shown in FIG. 6A, the portion 13C between the first teeth 13A and the second teeth 13B of the lower horizontal plate 13 and the lower vertical plate The top ends 12G of the 12 second teeth 12B are fitted into the valley bottom portions 12D between the first teeth 12A of the upper vertical plate 12.

なお、下層の縦板１２の第２の歯１２Ｂと上層の縦板１２の第１の歯１２Ａとを噛み合わせる際には、これらの歯１２Ａ，１２Ｂがのこぎり歯状になっているため、図６（ｂ）に矢印Ｋで示すように、上層の縦板１２を斜めに移動させて、下層の縦板１２の第２の歯１２Ｂに上層の縦板１２の第１の歯１２Ａを噛み合わせることができる。 When the second teeth 12B of the lower vertical plate 12 and the first teeth 12A of the upper vertical plate 12 are engaged with each other, these teeth 12A and 12B are in a sawtooth shape. 6 (b), the upper vertical plate 12 is moved obliquely, and the first teeth 12A of the upper vertical plate 12 are engaged with the second teeth 12B of the lower vertical plate 12. be able to.

次に、図７〜図８に基づき、放射線コリメータ１１の製作手順について説明する。
まず、図７に示すように、ガイドフレーム１４を用意する。ガイドフレーム１４の内側の一対の対向面１４Ａ，１４Ｂには、複数の縦板用溝１４ａ，１４ｂが等間隔に対向して形成されている。同様に、ガイドフレーム１４の内側の他の一対の対向面１４Ｃ，１４Ｄには、複数の横板用溝１４ｃ，１４ｄが等間隔に対向して形成されている。
続いて、図８に示すように、縦板１２の両端部１２ａ，１２ｂを、ガイドフレーム１４の縦板用溝１４ａ，１４ｂにそれぞれ嵌め込む。
続いて、図９に示すように、横板１３の両端部１３ａ，１３ｂを、ガイドフレーム１４の横板用溝１４ｃ，１４ｄにそれぞれ嵌め込む。勿論、このとき、縦板１２の谷底部１２Ｅと横板１３の谷底部１３Ｄを係合させる（噛み合わせる）。
かくして、１層分の縦板１２と横板１３の嵌め込みが完了する。 Next, a manufacturing procedure of the radiation collimator 11 will be described with reference to FIGS.
First, as shown in FIG. 7, a guide frame 14 is prepared. A plurality of vertical plate grooves 14a and 14b are formed on the pair of opposed surfaces 14A and 14B inside the guide frame 14 so as to face each other at equal intervals. Similarly, a plurality of lateral plate grooves 14c and 14d are formed at equal intervals on the other pair of opposing surfaces 14C and 14D inside the guide frame 14.
Subsequently, as shown in FIG. 8, both end portions 12 a and 12 b of the vertical plate 12 are fitted into the vertical plate grooves 14 a and 14 b of the guide frame 14, respectively.
Subsequently, as shown in FIG. 9, both end portions 13 a and 13 b of the horizontal plate 13 are fitted into the horizontal plate grooves 14 c and 14 d of the guide frame 14, respectively. Of course, at this time, the valley bottom 12E of the vertical plate 12 and the valley bottom 13D of the horizontal plate 13 are engaged (engaged).
Thus, the fitting of the vertical plate 12 and the horizontal plate 13 for one layer is completed.

以下、同様に、各層の縦板１２と横方向１３を、順次、縦板用溝１４ａ，１４ｂと横板用溝１４ｃ，１４ｄにそれぞれ嵌め込んでいく。勿論、このとき、上下の層では、下層の縦板１２の第２の歯１２Ｂと上層の縦板１２の第１の歯１２Ａの噛み合わせや、下層の横板１３の第２の歯１３Ｂと上層の横板１３の第１の歯１３Ａの噛み合わせも行う。
なお、この噛み合わせの際に縦板１２や横板１３を多少斜めに移動させることができるようにするため、縦板１２の長さに比べて縦板用溝１４ａ，１４ｂの間隔を多少広くして、縦板１２の両端部１２ａ，１２ｂと縦板用溝１４ａ，１４ｂとの間に多少の隙間が得られるようにしており、横板１３の長さに比べて横板用溝１４ｃ，１４ｃの間隔を多少広くして、横板１３の両端部１３ａ，１３ｂと横板用溝１４ｃ，１４ｄとの間に多少の隙間が得られるようにしている。 Similarly, the vertical plate 12 and the horizontal direction 13 of each layer are sequentially fitted in the vertical plate grooves 14a and 14b and the horizontal plate grooves 14c and 14d, respectively. Of course, at this time, in the upper and lower layers, the engagement of the second teeth 12B of the lower vertical plate 12 and the first teeth 12A of the upper vertical plate 12, and the second teeth 13B of the lower horizontal plate 13 The first teeth 13A of the upper horizontal plate 13 are also engaged.
In order to allow the vertical plate 12 and the horizontal plate 13 to move somewhat obliquely during the meshing, the interval between the vertical plate grooves 14a and 14b is slightly wider than the length of the vertical plate 12. Thus, a slight gap is obtained between the both end portions 12a, 12b of the vertical plate 12 and the vertical plate grooves 14a, 14b, and the horizontal plate grooves 14c, 14c, The gap 14c is slightly widened so that a slight gap is obtained between both end portions 13a, 13b of the horizontal plate 13 and the horizontal plate grooves 14c, 14d.

次に、図１０及び図１１に基づき、本発明の実施の形態例に係る放射線検出器について説明する。
図１０に示すように、本実施の形態例の放射線検出器は、上記のような構成の放射線コリメータ１１と、この放射線コリメータ１１の深さ方向（図１０の上下方向）の一端側（放射線の出射側）に配置された放射線検出部３２とを有する構成となっている。 Next, a radiation detector according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 10, the radiation detector according to the present embodiment includes a radiation collimator 11 having the above-described configuration, and one end side (radiation direction of the radiation collimator 11 in the depth direction (vertical direction in FIG. 10). The radiation detection unit 32 is disposed on the emission side.

放射線コリメータ１１はセンサ筐体３１に固定されており、放射線検出部３２はセンサ筐体３１の内部に収容されている。なお、放射線検出器３２は、図１１に示すような多層のものでも、１層のでもよい。 The radiation collimator 11 is fixed to the sensor casing 31, and the radiation detector 32 is accommodated inside the sensor casing 31. The radiation detector 32 may be a multilayer as shown in FIG. 11 or a single layer.

以上のように、本実施の形態例の放射線コリメータ１１によれば、複数の縦板１２と複数の横板１３とを有してなる層を、複数積層してなるものであって、各縦板１２は、長さ方向が縦方向となるように配設された帯状の板であって、板幅方向の一端部にはのこぎり歯状の複数の第１の歯１２Ａが、長さ方向に等間隔に形成され、板幅方向の他端部にはのこぎり歯状の複数の第２の歯１２Ｂが、長さ方向に等間隔で且つ長さ方向の向きが第１の歯１２Ａと逆向きに形成され、第１の歯１２Ａの幅と、第２の歯１２Ｂの幅と、第１の歯１２Ａと第２の歯１２Ｂの間の部分１２Ｃの幅とが等しい形状であり、各横板１３は、長さ方向が横方向となり縦板１２に直交するように配設された帯状の板であって、板幅方向の一端部にはのこぎり歯状の複数の第１の歯１３Ａが、長さ方向に等間隔に形成され、板幅方向の他端部にはのこぎり歯状の複数の第２の歯１３Ｂが、長さ方向に等間隔で且つ長さ方向の向きが第１の歯１３Ａと逆向きに形成され、第１の歯１３Ａの幅と、第２の歯１３Ｂの幅と、第１の歯１３Ａと第２の歯１３Ｂの間の部分１３Ｃの幅とが等しい形状であり、各層は何れも、等間隔に配設された複数枚の縦板１２と、これらの縦板１２の上に等間隔で配設された複数枚の横板１３とを有し、且つ、縦板１２の第２の歯１２Ｂの間の谷底部１２Ｅと、横板１３の第１の歯１３Ａの間の谷底部１３Ｄとを係合させた構成であり、隣接する上下の層の縦板１２同士は、下層の縦板１２の第２の歯１２Ｂと、上層の縦板１２の第１の歯１２Ａとが噛み合い、且つ、この噛み合っている第１の歯１２Ａの板幅方向に沿う面１２Ａ−１と、第２の歯１２Ｂの板幅方向に沿う面１２Ｂ−１とによって、下層の横板１３の第１の歯１３Ａと第２の歯１３Ｂの間の部分１３Ｃを挾持しており、隣接する上下の層の横板１３同士は、下層の横板１３の第２の歯１３Ｂと、上層の横板１３の第１の歯１３Ａとが噛み合い、且つ、この噛み合っている第１の歯１３Ａの板幅方向に沿う面１３Ａ−１と、第２の歯１３Ｂの板幅方向に沿う面１３Ｂ−１とによって、上層の縦板１２の第１の歯１２Ａと第２の歯１２Ｂの間の部分１２Ｃを挾持しており、縦板１２と横板１３で構成された矩形の貫通孔１５が縦横に複数配列されて、格子状を成していることを特徴としており、従来の方式に比べて、のこぎり歯状の第１の歯１２Ａ，１３Ａと第２の歯１２Ｂ，１３Ｂを有する縦板１２と横板１３を積層する単純な構造であるため、大面積化と高アスペクト比化を容易に達成することができる。
また、横板１３の第１の歯１３Ａと第２の歯１３Ｂがのこぎり歯状になっているため、下層の横板１３の第２の歯１３Ｂと上層の横板１３の第１の歯１３Ａとを噛み合わせる際には、上層の横板１３を斜めに移動させて、下層の横板１３の第２の歯１３Ｂに上層の横板１３の第１の歯１３Ａを噛み合わせることができる。
同様に、縦板１２の第１の歯１２Ａと第２の歯１２Ｂがのこぎり歯状になっているため、下層の縦板１２の第２の歯１２Ｂと上層の縦板１２の第１の歯１２Ａとを噛み合わせる際には、上層の縦板１２を斜めに移動させて、下層の縦板１２の第２の歯１２Ｂに上層の縦板１２の第１の歯１２Ａを噛み合わせることができる。
このため、矩形状の歯同士を噛み合わせるような場合に比べて、容易且つ確実に積層作業を行うことができ、上下の縦板１２の歯１２Ａ，１２Ｂで横板１３を挟むことや、上下の横板１２の歯１３Ａ，１３Ｂで縦板１２を挟むことも容易且つ確実に行うことができる。
また、縦板１２や横板１３の加工は、簡易な同一形状のプレス加工金型１６のみを用いたプレス加工によって行うことができるため、低コスト化を図ることもできる。 As described above, according to the radiation collimator 11 of the present embodiment, a plurality of layers each including a plurality of vertical plates 12 and a plurality of horizontal plates 13 are stacked, The plate 12 is a strip-shaped plate disposed so that the length direction is the vertical direction, and a plurality of sawtooth-shaped first teeth 12A are provided in the length direction at one end in the plate width direction. A plurality of sawtooth-shaped second teeth 12B formed at equal intervals in the widthwise direction at the other end are equally spaced in the length direction and the direction of the length direction is opposite to that of the first teeth 12A The width of the first tooth 12A, the width of the second tooth 12B, and the width of the portion 12C between the first tooth 12A and the second tooth 12B are equal to each other, and each horizontal plate Reference numeral 13 denotes a belt-like plate whose length direction is in the horizontal direction and perpendicular to the vertical plate 12, and a sawtooth-like compound is formed at one end in the plate width direction. The first teeth 13A are formed at equal intervals in the length direction, and a plurality of sawtooth-shaped second teeth 13B are formed at equal intervals in the length direction at the other end in the plate width direction. The direction of the direction is formed opposite to the first tooth 13A, the width of the first tooth 13A, the width of the second tooth 13B, and the portion 13C between the first tooth 13A and the second tooth 13B. Each layer has a plurality of vertical plates 12 arranged at equal intervals, and a plurality of horizontal plates 13 arranged at equal intervals on these vertical plates 12. And a valley bottom portion 12E between the second teeth 12B of the vertical plate 12 and a valley bottom portion 13D between the first teeth 13A of the horizontal plate 13 are engaged with each other. The upper and lower vertical plates 12 mesh with each other, and the second teeth 12B of the lower vertical plate 12 and the first teeth 12A of the upper vertical plate 12 mesh with each other. The first tooth 13A and the second tooth 13A of the lower horizontal plate 13 are formed by the surface 12A-1 along the plate width direction of the first tooth 12A and the surface 12B-1 along the plate width direction of the second tooth 12B. 13C between the adjacent teeth 13B. The adjacent upper and lower horizontal plates 13 are separated from each other by the second teeth 13B of the lower horizontal plate 13 and the first teeth 13A of the upper horizontal plate 13. And the surface 13A-1 along the plate width direction of the meshed first teeth 13A and the surface 13B-1 along the plate width direction of the second teeth 13B, thereby the upper vertical plate 12 A portion 12C between the first tooth 12A and the second tooth 12B is held, and a plurality of rectangular through-holes 15 composed of a vertical plate 12 and a horizontal plate 13 are arranged vertically and horizontally to form a lattice shape. Compared to the conventional method, the first teeth 12A, 13A and the second teeth are sawtooth-shaped. Since the vertical plate 12 and the horizontal plate 13 having the teeth 12B and 13B are laminated, a large area and a high aspect ratio can be easily achieved.
Further, since the first teeth 13A and the second teeth 13B of the horizontal plate 13 are sawtooth-shaped, the second teeth 13B of the lower horizontal plate 13 and the first teeth 13A of the upper horizontal plate 13 are used. Can be meshed with the second teeth 13B of the lower horizontal plate 13 and the first teeth 13A of the upper horizontal plate 13 can be engaged with each other.
Similarly, since the first tooth 12A and the second tooth 12B of the vertical plate 12 are sawtooth-shaped, the second tooth 12B of the lower vertical plate 12 and the first tooth of the upper vertical plate 12 When meshing with 12A, the upper vertical plate 12 can be moved obliquely, and the first teeth 12A of the upper vertical plate 12 can mesh with the second teeth 12B of the lower vertical plate 12. .
For this reason, it is possible to easily and surely perform the laminating operation as compared with the case where the teeth of the rectangular shape are engaged with each other, and the horizontal plate 13 is sandwiched between the teeth 12A and 12B of the upper and lower vertical plates 12, or The vertical plate 12 can be easily and reliably sandwiched between the teeth 13A and 13B of the horizontal plate 12.
Further, since the processing of the vertical plate 12 and the horizontal plate 13 can be performed by press processing using only a simple press-molding die 16 having the same shape, the cost can be reduced.

また、本実施の形態例の放射線コリメータ１１によれば、直方体状の筒体であるガイドフレーム１４を有し、ガイドフレーム１４の内側の一対の対向面１４Ａ，１４Ｂには、複数の縦板用溝１４ａ，１４ｂが等間隔に対向して形成され、且つ、ガイドフレーム１４の内側の他の一対の対向面１４Ｃ，１４Ｄには、複数の横板用溝１４ｃ，１４ｄが等間隔に対向して形成されており、縦板用溝１４ａ，１４ｂには縦板１２の両端部１２ａ，１２ｂが嵌め込まれ、横板用溝１４ｃ，１４ｄには横板１３の両端部１３ａ，１３ｂがはめ込まれていることを特徴としているため、簡易な構成で確実に縦板１２と横板１３を支持することができる。 In addition, according to the radiation collimator 11 of the present embodiment, the guide frame 14 is a rectangular parallelepiped cylinder, and a plurality of vertical plates are provided on the pair of opposed surfaces 14A and 14B inside the guide frame 14. Grooves 14a and 14b are formed at equal intervals, and a plurality of horizontal plate grooves 14c and 14d are arranged at equal intervals on the other pair of opposed surfaces 14C and 14D inside the guide frame 14. Both ends 12a and 12b of the vertical plate 12 are fitted into the vertical plate grooves 14a and 14b, and both ends 13a and 13b of the horizontal plate 13 are fitted into the horizontal plate grooves 14c and 14d. Therefore, the vertical plate 12 and the horizontal plate 13 can be reliably supported with a simple configuration.

また、本実施の形態例の放射線検出器によれば、上記の放射線コリメータ１１と、この放射線コリメータ１１の深さ方向の一端側に配置された放射線検出部３２とを有することを特徴としているため、大面積化や高アスペクト比化などが可能な放射線コリメータ１１を用いた高性能の放射線検出器を実現することができる。 Further, the radiation detector according to the present embodiment is characterized by having the radiation collimator 11 and the radiation detection unit 32 disposed on one end side in the depth direction of the radiation collimator 11. Thus, a high-performance radiation detector using the radiation collimator 11 capable of increasing the area or the aspect ratio can be realized.

なお、上記では、ガイドフレーム１４を用いたが、必ずしもこれに限定するものではなく、ガイドフレーム１４以外の支持手段によって縦板１２と横板１３を支持するようにしてもよく、更には縦板１２と横板１３だけで構成してもよい。縦板１２と横板１３だけで構成する場合には、これらの縦板１２同士や、横板１３同士や、縦板１２と横板１３を、接着剤などの接着手段による接着や溶接などの結合手段によって結合すればよい。なお、ガイドフレーム１４などの支持手段を用いる場合にも、同様の結合手段によって縦板１２同士や、横板１３同士や、縦板１２と横板１３を結合してもよい。 In the above description, the guide frame 14 is used. However, the present invention is not necessarily limited to this, and the vertical plate 12 and the horizontal plate 13 may be supported by support means other than the guide frame 14, and further the vertical plate. You may comprise only 12 and the horizontal plate 13. FIG. When the vertical plate 12 and the horizontal plate 13 are used alone, the vertical plates 12, the horizontal plates 13, or the vertical plate 12 and the horizontal plate 13 are bonded or welded by an adhesive means such as an adhesive. What is necessary is just to couple | bond by a coupling | bonding means. In addition, also when using support means, such as the guide frame 14, you may couple | bond the vertical plates 12 with each other, horizontal plates 13, or the vertical plate 12 and the horizontal plate 13 with the same coupling means.

また、上記では、縦板１２と横板１３を同一形状のものとしたが、必ずしもこれに限定するものではなく、縦板１２と横板１３の全体の長さが異なっていてもよく（この場合、放射線コリメータ全体の平面視の形状が、図１（ｂ）に示すような正方形状ではなく、長方形状になる）、縦板１２と横板１２の歯の間隔が異なっていてもよい（この場合、放射線コリメータの各孔の平面視の形状が、図１（ｂ）に示すような正方形ではなく、長方形状になる）。 In the above description, the vertical plate 12 and the horizontal plate 13 have the same shape. However, the present invention is not necessarily limited to this, and the overall lengths of the vertical plate 12 and the horizontal plate 13 may be different. In this case, the shape of the entire radiation collimator in plan view is not a square shape as shown in FIG. 1B, but a rectangular shape), and the interval between teeth of the vertical plate 12 and the horizontal plate 12 may be different ( In this case, the shape of each hole of the radiation collimator in plan view is not a square as shown in FIG.

また、図１（ａ）に示す如く、放射線コリメータ１１の上端や下端は、縦板１２や横板１３ののこぎり歯状の歯１２Ａ，１２Ｂ，１３Ａ，１３Ｂがむきだしのまま（ギザギザ状）でもよいが、平らにしてもよい。例えば、片側が平らでその反対側に歯形の付いた格子状の枠を、放射線コリメータ１１の上端や下端の縦板１２や横板１３の歯１２Ａ，１２Ｂ，１３Ａ，１３Ｂに噛み合わせるこによって、平らにしてもよい。 Further, as shown in FIG. 1A, the upper and lower ends of the radiation collimator 11 may have the sawtooth teeth 12A, 12B, 13A, and 13B of the vertical plate 12 and the horizontal plate 13 exposed (notched). However, it may be flat. For example, by meshing a grid-like frame with a flat side on one side and a tooth shape on the opposite side to the vertical plate 12 at the upper and lower ends of the radiation collimator 11 and the teeth 12A, 12B, 13A and 13B of the horizontal plate 13, It may be flat.

また、本発明は天文衛星に搭載する放射線検出器に適用して有用なものであるが、これに限定するものではなく、天文以外の様々な分野（例えば医療や非破壊検査などの分野）に用いられる放射線検出器にも適用することができる。 Further, the present invention is useful when applied to a radiation detector mounted on an astronomical satellite, but is not limited to this, and is applicable to various fields other than astronomy (for example, medical and nondestructive inspection fields) It can also be applied to the radiation detector used.

本発明は放射線コリメータ及びこれを備えた放射線検出器に関するものであり、放射線コリメータの大面積化や高アスペクト比化などを図る場合に適用して有用なものである。 The present invention relates to a radiation collimator and a radiation detector provided with the radiation collimator, and is useful when applied to increase the area of the radiation collimator or to increase the aspect ratio.

１１放射線コリメータ
１２縦板
１２Ａ第１の歯
１２Ａ−１板幅方向に沿う面
１２Ａ−２板幅方向に対して傾斜している面
１２Ｂ第２の歯
１２Ｂ−１板幅方向に沿う面
１２Ｂ−２板幅方向に対して傾斜している面
１２Ｃ第１の歯と第２の歯の間の部分
１２Ｄ，１２Ｅ谷底部
１２Ｆ，１２Ｇ先端部
１２ａ，１２ｂ端部
１３横板
１３Ａ−１板幅方向に沿う面
１３Ａ−２板幅方向に対して傾斜している面
１３Ｂ第２の歯
１３Ｂ−１板幅方向に沿う面
１３Ｂ−２板幅方向に対して傾斜している面
１３Ｃ第１の歯と第２の歯の間の部分
１３Ｄ，１３Ｅ谷底部
１３Ｆ，１３Ｇ先端部
１３ａ，１３ｂ端部
１４ガイドフレーム
１４Ａ，１４Ｂ，１４Ｃ，１４Ｄガイドフレームの内側の面
１４ａ，１４ｂ縦板用溝
１４ｃ，１４ｄ横板用溝
１５貫通孔
１６プレス加工金型
１７薄板
１７Ａ第１の歯
１７Ｂ第２の歯
１８プレス加工予定ライン
２１第１層
２２第２層
２３第３層
２４第４層
２５第５層
３１センサ筐体
３２放射線検出部 11 radiation collimator 12 vertical plate 12A first tooth 12A-1 surface along plate width direction 12A-2 surface inclined with respect to plate width direction 12B second tooth 12B-1 surface along plate width direction 12B- 2 Surface inclined with respect to the plate width direction 12C Portions between the first teeth and the second teeth 12D, 12E Valley bottom portions 12F, 12G Tip portions 12a, 12b End portions 13 Horizontal plates 13A-1 Plate width direction 13A-2 surface inclined with respect to the plate width direction 13B second tooth 13B-1 surface along the plate width direction 13B-2 surface inclined with respect to the plate width direction 13C first tooth 13D, 13E Valley bottom part 13F, 13G Tip part 13a, 13b End part 14 Guide frame 14A, 14B, 14C, 14D Inner surface 14a, 14b Vertical plate groove 14c, 14 Horizontal plate groove 15 Through-hole 16 Press working die 17 Thin plate 17A First tooth 17B Second tooth 18 Press working line 21 First layer 22 Second layer 23 Third layer 24 Fourth layer 25 Fifth layer 31 Sensor housing 32 Radiation detector

Claims

A plurality of layers each having a plurality of vertical plates and a plurality of horizontal plates are laminated,
Each vertical plate is a strip-shaped plate arranged such that the length direction is the vertical direction, and a plurality of sawtooth-shaped first teeth are provided in the length direction at one end in the plate width direction. A plurality of sawtooth-shaped second teeth are formed at equal intervals at the other end in the plate width direction, and are formed at equal intervals in the length direction and in the direction opposite to the first teeth in the length direction. The width of the first tooth, the width of the second tooth, and the width of the portion between the first tooth and the second tooth are equal,
Each horizontal plate is a strip-shaped plate that is arranged so that its length direction is horizontal and perpendicular to the vertical plate, and a plurality of sawtooth-shaped first teeth are provided at one end in the plate width direction. A plurality of sawtooth-shaped second teeth are formed at equal intervals in the length direction, and a plurality of sawtooth-shaped second teeth are arranged at equal intervals in the length direction and the first direction is in the length direction. Formed in the opposite direction, the width of the first tooth, the width of the second tooth, and the width of the portion between the first tooth and the second tooth are equal,
Each layer has a plurality of vertical plates arranged at equal intervals, and a plurality of horizontal plates arranged at equal intervals on these vertical plates, and the second of the vertical plates. The valley bottom between the teeth and the valley bottom between the first teeth of the horizontal plate,
The adjacent vertical plates of the upper and lower layers are meshed with the second teeth of the lower vertical plate and the first teeth of the upper vertical plate, and in the width direction of the meshed first teeth. The surface between the first tooth and the second tooth of the lower lateral plate is held by the surface along the surface along the plate width direction of the second tooth,
The adjacent horizontal plates of the upper and lower layers are meshed with the second teeth of the lower horizontal plate and the first teeth of the upper horizontal plate, and in the width direction of the meshed first teeth. The portion between the first tooth and the second tooth of the upper vertical plate is held by the surface along the surface along the plate width direction of the second tooth,
A radiation collimator characterized in that a plurality of rectangular through-holes composed of vertical plates and horizontal plates are arranged vertically and horizontally to form a lattice shape.

The radiation collimator according to claim 1,
It has a guide frame that is a rectangular parallelepiped cylinder,
A plurality of vertical plate grooves are formed at equal intervals on the pair of opposed surfaces inside the guide frame, and a plurality of horizontal plate grooves are formed on the other pair of opposed surfaces inside the guide frame. Are formed at equal intervals,
A radiation collimator characterized in that both ends of a vertical plate are fitted into the vertical plate groove, and both ends of the horizontal plate are fitted into the horizontal plate groove.

Radiation collimator according to claim 1 or 2,
A radiation detector disposed on one end side in the depth direction of the radiation collimator;
A radiation detector comprising: