JP4717155B1 - Radiography equipment - Google Patents
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- JP4717155B1 JP4717155B1 JP2010213759A JP2010213759A JP4717155B1 JP 4717155 B1 JP4717155 B1 JP 4717155B1 JP 2010213759 A JP2010213759 A JP 2010213759A JP 2010213759 A JP2010213759 A JP 2010213759A JP 4717155 B1 JP4717155 B1 JP 4717155B1
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- 238000002601 radiography Methods 0.000 title claims description 3
- 238000003384 imaging method Methods 0.000 claims abstract description 27
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 2
- 238000013459 approach Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Apparatus For Radiation Diagnosis (AREA)
Abstract
【課題】トレイ上におけるカセッテのホルダの位置及び姿勢を簡単に変更できる放射線撮影装置を提供する。
【解決手段】カセッテホルダ３０の短辺がトレイ２０の上側の辺に沿う固定位置（第１の固定位置）と、カセッテホルダ３０の長辺がトレイ２０の上側の辺に沿う固定位置（第２の固定位置）との間でカセッテホルダ３０を移動させる際、可動連結部によってカセッテホルダ３０の軌道と姿勢が案内される。従って、従来のようにカセッテホルダを外して付け直すような手間が要らず、簡単にカセッテホルダ３０の姿勢を変更できる。
【選択図】図３A radiation imaging apparatus capable of easily changing the position and posture of a cassette holder on a tray is provided.
A fixing position (first fixing position) in which the short side of the cassette holder 30 is along the upper side of the tray 20 and a fixing position (second position) in which the long side of the cassette holder 30 is along the upper side of the tray 20 When the cassette holder 30 is moved with respect to the fixed position, the trajectory and posture of the cassette holder 30 are guided by the movable connecting portion. Therefore, there is no need to remove and reattach the cassette holder as in the prior art, and the posture of the cassette holder 30 can be easily changed.
[Selection] Figure 3
Description
本発明は、放射線画像の撮像体を内包するカセッテが装着されたホルダをトレイ上に固定して撮影を行う放射線撮影装置に係り、特に、トレイ上における撮像体の固定位置と姿勢を変更可能な放射線撮影装置に関するものである。 The present invention relates to a radiographic apparatus that performs imaging by fixing a holder with a cassette containing a radiographic image pickup body on a tray, and in particular, the fixing position and posture of the image pickup body on the tray can be changed. The present invention relates to a radiation imaging apparatus.
従来より、感光フィルムや撮像素子等が内包されたカセッテと称される検出媒体を装着してＸ線画像を撮像するＸ線撮影装置が医療分野で広く用いられている。この種のＸ線撮影装置では、例えば、カセッテが装着されたトレイを装置本体に収容し、撮影部位に合わせて装置本体の位置を調節し、Ｘ線源と装置本体の間に被写体（人体）を位置させた状態でＸ線を放射し、被写体を透過したＸ線の画像をカセッテの感光フィルム等により撮像する。 2. Description of the Related Art Conventionally, an X-ray imaging apparatus that captures an X-ray image by mounting a detection medium called a cassette including a photosensitive film, an imaging element, and the like has been widely used in the medical field. In this type of X-ray imaging apparatus, for example, a tray on which a cassette is mounted is accommodated in the apparatus main body, the position of the apparatus main body is adjusted according to the imaging region, and a subject (human body) is placed between the X-ray source and the apparatus main body. X-rays are emitted in a state where is positioned, and an X-ray image transmitted through the subject is picked up by a cassette photosensitive film or the like.
医療用のＸ線撮影装置で用いられるカセッテのサイズは規格により定められており、被写体に応じてサイズを選択することが可能である。しかしながら、被写体の体格が大きい場合などにおいては、所望の部位を撮影できるようにするため、トレイ上に装着するカセッテの向きを変更することがある。例えば、被写体の人体を立たせた状態で撮影する立位型のＸ線撮影装置では、長方形状のカセッテの長手方向を垂直に向ける装着位置と水平に向ける装着位置の２通りが用意されていることがある。通常、トレイ上におけるそれぞれの装着位置は固定されているため、カセッテの向きを変更する場合には、一方の装着位置で固定されたカセッテのホルダをトレイから一旦取り外して、他方の装着位置に付け直す必要がある。すなわち、カセッテの向きを変更するために、ホルダの取り外し・取り付け作業が必要となる。そのため、多数の撮影を円滑に行わなければならない放射線検査の現場では、このような作業が大きな負担となっている。 The size of the cassette used in the medical X-ray imaging apparatus is determined by the standard, and the size can be selected according to the subject. However, when the physique of the subject is large, the orientation of the cassette mounted on the tray may be changed so that a desired part can be photographed. For example, in a standing-type X-ray imaging apparatus that captures an image of a subject with the human body standing, there are two types of mounting positions, a mounting position in which the longitudinal direction of the rectangular cassette is oriented vertically and a mounting position in which the cassette is oriented horizontally. There is. Normally, each mounting position on the tray is fixed, so when changing the orientation of the cassette, remove the holder of the cassette fixed at one mounting position from the tray and attach it to the other mounting position. I need to fix it. That is, in order to change the orientation of the cassette, it is necessary to remove and attach the holder. For this reason, such work is a heavy burden in the field of radiation inspection in which a large number of images must be taken smoothly.
本発明はかかる事情に鑑みてなされたものであり、その目的は、トレイ上におけるカセッテのホルダの位置及び姿勢を簡単に変更できる放射線撮影装置を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a radiation imaging apparatus that can easily change the position and orientation of a cassette holder on a tray.
本発明に係る放射線撮影装置は、放射線の画像を撮像する撮像体を内包した長方形の板状のカセッテが装着されるカセッテホルダと、前記カセッテホルダが載せられたトレイと、前記トレイを出し入れ自在に収容するトレイ収容部と、前記トレイを前記トレイ収容部から引き出した状態で前記トレイ収容部のトレイ出入り口の外側に位置する前記トレイの側縁に立設され、前記トレイを前記トレイ収容部に収容した状態で前記トレイ出入り口を塞ぐ蓋部と、前記カセッテホルダの一辺が上記トレイ上の所定の基準線に沿う第１の固定位置と、前記カセッテホルダの前記一辺に直交する他の一辺が前記所定の基準線に沿う第２の固定位置との間で、前記カセッテホルダが姿勢を変えながら移動することを可能にしつつ、前記カセッテホルダを前記トレイに連結するとともに、当該移動時の前記カセッテホルダの軌道と姿勢を案内する可動連結部と、前記カセッテホルダが前記第１の固定位置または前記第２の固定位置にあるとき、前記カセッテホルダを前記トレイ上において解除可能にロックするロック部とを有する。
前記可動連結部は、複数の回転体と、前記回転体が転がりながら係合するループ状の走行路が外周に形成された回転体案内部とを含む。前記走行路は、その形状が円形の場合に比べて、前記第１の固定位置から前記第２の固定位置への前記カセッテホルダの移動過程で前記蓋部の側へ最も出っ張った状態になったときの前記カセッテホルダの隅を前記蓋部から遠ざけて、当該隅と前記蓋部とを接触させないように前記軌道と前記姿勢を案内する、非円形の形状に形成される。
前記複数の回転体及び前記回転体案内部の一方が前記トレイに、他方が前記カセッテホルダに設けられている。
A radiation imaging apparatus according to the present invention includes a cassette holder to which a rectangular plate-like cassette including an imaging body for capturing an image of radiation is mounted, a tray on which the cassette holder is placed, and a tray that can be inserted and removed freely. A tray accommodating portion to be accommodated, and standing on a side edge of the tray located outside a tray entrance of the tray accommodating portion in a state where the tray is pulled out from the tray accommodating portion, and the tray is accommodated in the tray accommodating portion In this state, the lid that closes the tray entrance, a first fixed position where one side of the cassette holder follows a predetermined reference line on the tray, and another side orthogonal to the one side of the cassette holder are the predetermined Between the second fixed position along the reference line of the cassette holder while allowing the cassette holder to move while changing its posture. A movable connecting part for connecting to the tray and guiding the trajectory and posture of the cassette holder during the movement, and when the cassette holder is in the first fixed position or the second fixed position, the cassette holder is And a lock portion that releasably locks on the tray .
The movable connecting portion includes a plurality of rotating bodies, and a rotating body guide portion formed on the outer periphery with a loop-shaped traveling path with which the rotating bodies engage while rolling. Compared with the case where the shape of the traveling path is circular, the traveling path is in a state of protruding most toward the lid portion in the process of moving the cassette holder from the first fixed position to the second fixed position. When the corner of the cassette holder is away from the lid, the track and the posture are guided so as not to contact the corner and the lid.
One of the plurality of rotating bodies and the rotating body guide portion is provided on the tray, and the other is provided on the cassette holder.
好適に、上記放射線撮影装置は、正方形の４つの頂点に対応する位置関係で前記トレイ又は前記カセッテホルダに配設された４つの前記回転体を有する。 Preferably, the radiation imaging apparatus includes the four rotating bodies disposed on the tray or the cassette holder in a positional relationship corresponding to four apexes of a square.
好適に、前記回転体の周回方向に沿って凹条が形成され、前記回転体案内部の前記走行路が前記凹条に嵌った状態で前記回転体が前記走行路を転がる、又は、前記回転体案内部の前記走行路に沿って凹条が形成され、前記回転体が前記凹条に嵌った状態で前記走行路を転がる。 Preferably, a recess is formed along a rotating direction of the rotating body, and the rotating body rolls on the traveling path in a state where the traveling path of the rotating body guide portion is fitted in the recess, or the rotation A concave line is formed along the traveling path of the body guide portion, and the rotating body rolls on the traveling path in a state where the rotating body is fitted in the concave line.
好適に、任意の一の前記回転体とこれに隣接する他の前記回転体との間隔が、前記走行路によって形成される前記ループの外形の最小幅より狭い間隔となるように、３以上の前記回転体が配置される。 Preferably, such that the interval between the other of the rotating body adjacent thereto and one of the rotating body of the arbitrary becomes narrower interval than the minimum width of the outer shape of the loop formed by the running path, 3 or more The rotating body is arranged.
好適に、前記ロック部は、係止片と、前記カセッテホルダにおいて、前記カセッテホルダが前記第１の固定位置にある場合に前記係止片と係合可能な位置に固定された第１係合部と、前記カセッテホルダにおいて、前記カセッテホルダが前記第２の固定位置にある場合に前記係止片と係合可能な位置に固定された第２係合部と、前記トレイに対して前記係止片を相対的に移動させる係止片移動機構であって、前記カセッテホルダが前記第１の固定位置にある場合、前記第１係合部に係合する位置と当該係合が外れる位置との間で前記係止片を移動させ、前記カセッテホルダが前記第２の固定位置にある場合、前記第２係合部に係合する位置と当該係合が外れる位置との間で前記係止片を移動させる係止片移動機構とを有する。 Preferably, the lock portion includes a locking piece and a first engagement of the cassette holder fixed at a position engageable with the locking piece when the cassette holder is in the first fixed position. A second engaging portion fixed at a position engageable with the locking piece when the cassette holder is in the second fixed position, and the engagement with respect to the tray. A locking piece moving mechanism for relatively moving a stopping piece, wherein when the cassette holder is in the first fixed position, a position for engaging with the first engaging portion and a position for releasing the engagement; When the cassette holder is in the second fixed position, the locking piece is moved between a position where it engages with the second engagement portion and a position where the engagement is released. And a locking piece moving mechanism for moving the piece.
好適に、前記カセッテホルダが前記第１の固定位置にある場合の前記第１係合部の前記トレイに対する相対位置と、前記カセッテホルダが前記第２の固定位置にある場合の前記第２係合部の前記トレイに対する相対位置とが等しくなるように、前記カセッテホルダ上に前記第１係合部及び前記第２係合部が配置される。 Preferably, the relative position of the first engagement portion with respect to the tray when the cassette holder is in the first fixed position, and the second engagement when the cassette holder is in the second fixed position. The first engaging portion and the second engaging portion are arranged on the cassette holder so that the relative position of the portion with respect to the tray becomes equal.
好適に、前記係止片移動機構は、前記カセッテホルダが前記第１の固定位置にある場合に前記第１係合部と係合する位置へ向かって前記係止片を付勢するとともに、前記カセッテホルダが前記第２の固定位置にある場合に前記第２係合部と係合する位置へ向かって前記係止片を付勢する付勢手段を含み、前記第１係合部は、前記カセッテホルダが前記第１の固定位置へ到達する手前で前記係止片が摺動する壁部を有し、前記第２係合部は、前記カセッテホルダが前記第２の固定位置へ到達する手前で前記係止片が摺動する壁部を有する。 Preferably, the locking piece moving mechanism urges the locking piece toward a position where the cassette holder is engaged with the first engagement portion when the cassette holder is in the first fixed position, and A biasing means for biasing the locking piece toward a position where the cassette holder is engaged with the second engaging portion when the cassette holder is in the second fixed position; The cassette holder has a wall portion on which the locking piece slides before reaching the first fixed position, and the second engaging portion is before the cassette holder reaches the second fixed position. And a wall portion on which the locking piece slides.
本発明によれば、トレイ上におけるカセッテのホルダの位置及び姿勢を簡単に変更できる。 According to the present invention, the position and posture of the cassette holder on the tray can be easily changed.
以下、本発明の実施形態に係る放射線撮影装置を説明する。
図１は、本実施形態に係る放射線撮影装置の一例を示す図であり、正面側から見た外観を示す。
図１に示す放射線撮影装置は、底面の基台２がボルト４によって床に固定された直立型の架台１と、カセッテ５を内蔵した装置本体３を有する。装置本体３は、図示しない移動機構によって架台１に取り付けられており、上下に移動可能となっている。
Hereinafter, a radiation imaging apparatus according to an embodiment of the present invention will be described.
FIG. 1 is a diagram illustrating an example of a radiation imaging apparatus according to the present embodiment, and illustrates an external appearance viewed from the front side.
The radiographic apparatus shown in FIG. 1 has an upright frame 1 in which a base 2 on the bottom surface is fixed to the floor with bolts 4 and an apparatus main body 3 in which a cassette 5 is built. The apparatus main body 3 is attached to the gantry 1 by a moving mechanism (not shown) and can move up and down.
図２〜４は、装置本体３の一例を示す図であり、トレイ２０が引き出された状態でカセッテホルダ３０がトレイ２０上を回転する様子を示す。
図２〜４に示す装置本体３は、カセッテ５と、カセッテ５が装着されるカセッテホルダ３０と、カセッテホルダ３０が固定されるトレイ２０と、トレイ２０を出し入れ自在に収容するトレイ収容部１０と、可動連結部（４１，４２）と、ロック部（５１〜５７）とを有する。
2 to 4 are views showing an example of the apparatus main body 3 and show how the cassette holder 30 rotates on the tray 20 in a state where the tray 20 is pulled out.
2 to 4 includes a cassette 5, a cassette holder 30 to which the cassette 5 is mounted, a tray 20 to which the cassette holder 30 is fixed, and a tray storage unit 10 that allows the tray 20 to be inserted and removed freely. The movable connecting portions (41, 42) and the lock portions (51 to 57) are provided.
カセッテ５は、長方形の板状の形態を有しており、放射線（例えばＸ線）の画像を撮像するための撮像体を内包する。撮像体は、例えば、Ｘ線を受けて蛍光発光する蛍光板と感光フィルムを組み合わせたアナログ式のものや、フォトダイオード等の光電変換素子をアレイ状に配列したデジタル式の撮像デバイスなどを含む。 The cassette 5 has a rectangular plate shape and includes an imaging body for capturing an image of radiation (for example, X-rays). The imaging body includes, for example, an analog type that combines a fluorescent plate that emits fluorescence upon receiving X-rays and a photosensitive film, and a digital imaging device in which photoelectric conversion elements such as photodiodes are arranged in an array.
カセッテホルダ３０は、カセッテ５を取り外し自在に装着する枠体であり、カセッテ５とほぼ同形の底板と、その四隅に立設された固定板を有する。固定板は、底板上に載置されたカセッテ５の四隅の形に合わせてＬ型に曲がっており、底板に対するカセッテ５の位置を固定する。底板はトレイ２０に面して配置される。 The cassette holder 30 is a frame on which the cassette 5 is detachably mounted. The cassette holder 30 includes a bottom plate that is substantially the same shape as the cassette 5 and fixed plates that are erected at the four corners. The fixing plate is bent in an L shape in accordance with the shape of the four corners of the cassette 5 placed on the bottom plate, and fixes the position of the cassette 5 with respect to the bottom plate. The bottom plate is arranged facing the tray 20.
トレイ２０は、カセッテホルダ３０より大きい矩形の板であり、その正面側にカセッテホルダ３０が配置される。トレイ２０の裏面には、トレイ収容部１０の側部のトレイ出入り口１１を通ってトレイ２０を水平方向にスライドさせる図示しないスライド機構が取り付けられている。トレイ２０を引き出した状態でトレイ出入り口１１の外側に位置するトレイ２０の側縁には、蓋部２１が立設される。蓋部２１は、トレイ２０がトレイ収容部１０に収容された状態でトレイ出入り口１１を塞ぐ。蓋部２１の外側には、トレイ２０を出し入れする際に把持する取手２２が設けられている。 The tray 20 is a rectangular plate larger than the cassette holder 30, and the cassette holder 30 is disposed on the front side thereof. A slide mechanism (not shown) that slides the tray 20 in the horizontal direction through the tray inlet / outlet 11 on the side of the tray accommodating portion 10 is attached to the back surface of the tray 20. A lid 21 is erected on the side edge of the tray 20 located outside the tray entrance 11 with the tray 20 pulled out. The lid portion 21 closes the tray entrance / exit 11 in a state where the tray 20 is accommodated in the tray accommodating portion 10. A handle 22 is provided on the outside of the lid 21 to be gripped when the tray 20 is taken in and out.
可動連結部（４１，４２）は、カセッテホルダ３０とトレイ２０を移動可能に連結する。
すなわち、可動連結部は、カセッテホルダ３０の短辺がトレイ２０の上側の辺に沿う固定位置（第１の固定位置：図２）と、カセッテホルダ３０の長辺がトレイ２０の上側の辺に沿う固定位置（第２の固定位置：図４）との間で、カセッテホルダ３０が姿勢を変えながら移動することを可能にしつつ、カセッテホルダ３０をトレイ２０に連結する。また、可動連結部は、トレイ２０上を移動する際のカセッテホルダ３０の軌道と姿勢を案内する。
The movable connecting portions (41, 42) connect the cassette holder 30 and the tray 20 to be movable.
That is, the movable connecting portion includes a fixed position where the short side of the cassette holder 30 is along the upper side of the tray 20 (first fixed position: FIG. 2), and the long side of the cassette holder 30 is on the upper side of the tray 20. The cassette holder 30 is coupled to the tray 20 while allowing the cassette holder 30 to move while changing its posture between the fixed position (second fixed position: FIG. 4) along. Further, the movable connecting portion guides the trajectory and posture of the cassette holder 30 when moving on the tray 20.
可動連結部は、具体的には、４つの滑車４１とカムリング４２を有する。カムリング４２は、滑車４１が転がりながら係合する走行路を備えている。走行路は、カムリング４２の外周においてループ上に形成されている。
ここで、滑車４１は、本発明における回転体の一例である。また、カムリング４２は、本発明における回転体案内部の一例である。
Specifically, the movable connecting portion includes four pulleys 41 and a cam ring 42. The cam ring 42 has a traveling path with which the pulley 41 engages while rolling. The travel path is formed on the loop on the outer periphery of the cam ring 42.
Here, the pulley 41 is an example of a rotating body in the present invention. The cam ring 42 is an example of a rotating body guide portion in the present invention.
図２〜図４の例において、滑車４１はカセッテホルダ３０の背面側に設けられ、カムリング４２はトレイ２０の正面側に設けられる。カムリング４２の走行路と滑車４１が係合することにより、カセッテホルダ３０がトレイ２０と連結された状態になる。また、カムリング４２の走行路を滑車４１が転がることにより、カセッテホルダ３０がトレイ２０の上を移動する。 2 to 4, the pulley 41 is provided on the back side of the cassette holder 30, and the cam ring 42 is provided on the front side of the tray 20. When the traveling path of the cam ring 42 and the pulley 41 are engaged, the cassette holder 30 is connected to the tray 20. Further, the cassette holder 30 moves on the tray 20 as the pulley 41 rolls along the traveling path of the cam ring 42.
滑車４１はカムリング４２の走行路に沿って転がるので、滑車４１の位置はカムリング４２の走行路上に制限される。すなわち、カセッテホルダ３０の各滑車４１の位置は、トレイ２０に設けられたカムリング４２の走行路上に制限される。従って、カセッテホルダ３０は、トレイ２０の上を移動する場合に、カセッテホルダ３０に設けられた各滑車４１の位置とトレイ２０に設けられたカムリング４２の走行路との相対的位置関係によって定まる所定の軌道に案内されながら移動する。 Since the pulley 41 rolls along the travel path of the cam ring 42, the position of the pulley 41 is limited to the travel path of the cam ring 42. That is, the position of each pulley 41 of the cassette holder 30 is limited on the travel path of the cam ring 42 provided on the tray 20. Therefore, when the cassette holder 30 moves on the tray 20, the cassette holder 30 is determined by a relative positional relationship between the position of each pulley 41 provided on the cassette holder 30 and the traveling path of the cam ring 42 provided on the tray 20. Move while being guided by the orbit.
また、カセッテホルダ３０の２以上の滑車４１がカムリング４２の走行路と接することにより、トレイ２０に対するカセッテホルダ３０の相対的な姿勢が定まる。従って、カセッテホルダ３０は、トレイ２０の上を移動する場合に、カセッテホルダ３０に設けられた各滑車４１の位置とトレイ２０に設けられたカムリング４２の走行路との相対的位置関係によって定まる姿勢に案内されながら移動する。 Further, the two or more pulleys 41 of the cassette holder 30 come into contact with the travel path of the cam ring 42, whereby the relative posture of the cassette holder 30 with respect to the tray 20 is determined. Therefore, when the cassette holder 30 moves on the tray 20, the posture is determined by the relative positional relationship between the position of each pulley 41 provided on the cassette holder 30 and the travel path of the cam ring 42 provided on the tray 20. Move while being guided by.
更に、本実施形態では、隣接する任意の２つの滑車の間隔が、カムリング４２の外周の走行路により形成されるループの外形の最小幅に比べて狭くなるように、４つの滑車４１がカセッテホルダ３０上に配置されている。これにより、カムリング４２は４つの滑車４１で囲まれた領域から外側に出ることができないので、図２〜図４に示すようにカセッテホルダ３０とトレイ２０が垂直に立った状態でも、４つの滑車４１とカムリング４２の係合が外れてカセッテホルダ３０が脱落することはない。 Furthermore, in the present embodiment, the four pulleys 41 are inserted into the cassette holder so that the interval between any two adjacent pulleys is narrower than the minimum width of the outer shape of the loop formed by the outer periphery of the cam ring 42. 30. As a result, the cam ring 42 cannot come out of the area surrounded by the four pulleys 41, so that the four pulleys can be used even when the cassette holder 30 and the tray 20 stand vertically as shown in FIGS. 41 and the cam ring 42 are not disengaged and the cassette holder 30 does not fall off.
図５は、対角に配置された２つの滑車４１を通るＡ−Ａ'線（図３）でカセッテホルダ３０とトレイ２０を切断した場合の要部を表す切断端面図である。
図５に示すように、滑車４１には、その周方向に沿って凹条４３が形成される。カムリング４２の外周の走行路が凹条４３に嵌った状態で、滑車４１が走行路の上を転がる。
以上が、可動連結部（４１，４２）の説明である。
FIG. 5 is a cut end view showing a main part when the cassette holder 30 and the tray 20 are cut along the line AA ′ (FIG. 3) passing through the two pulleys 41 arranged diagonally.
As shown in FIG. 5, the pulley 41 is formed with a recess 43 along its circumferential direction. The pulley 41 rolls on the traveling path in a state where the outer traveling path of the cam ring 42 is fitted in the recess 43.
The above is the description of the movable connecting portions (41, 42).
次に、ロック部（５１〜５８）について説明する。
ロック部（５１〜５８）は、カセッテホルダ３０が上述した第１の固定位置（図２）又は第２の固定位置（図４）にあるとき、カセッテホルダ３０をトレイ２０上において解除可能にロック（固定）する。
Next, the lock part (51-58) is demonstrated.
When the cassette holder 30 is in the first fixed position (FIG. 2) or the second fixed position (FIG. 4) described above, the lock portion (51-58) locks the cassette holder 30 so as to be releasable on the tray 20. (Fixed).
ロック部は、具体的には、係止ピン５１と、第１係合部材５７と、第２係合部材５８と、係止ピン移動機構（５２〜５６）を有する。第１係合部材５７及び第２係合部材５８はカセッテホルダ３０に設けられ、係止ピン５１と係止ピン移動機構（５２〜５６）はトレイ２０に設けられる。 Specifically, the lock portion includes a lock pin 51, a first engagement member 57, a second engagement member 58, and a lock pin moving mechanism (52 to 56). The first engaging member 57 and the second engaging member 58 are provided in the cassette holder 30, and the locking pin 51 and the locking pin moving mechanism (52 to 56) are provided in the tray 20.
第１係合部材５７及び第２係合部材５８は、係止ピン５１と係合するピン溝をそれぞれ有する。
第１係合部材５７のピン溝は、カセッテホルダ３０の裏面において、カセッテホルダ３０が第１の固定位置（図２）にある場合に係止ピン５１と係合可能な位置に固定される。第２係合部材５８のピン溝は、カセッテホルダ３０の裏面において、カセッテホルダ３０が第２の固定位置（図４）にある場合に係止ピン５１と係合可能な位置に固定される。
The first engagement member 57 and the second engagement member 58 each have a pin groove that engages with the locking pin 51.
The pin groove of the first engaging member 57 is fixed on the back surface of the cassette holder 30 at a position where it can engage with the locking pin 51 when the cassette holder 30 is in the first fixing position (FIG. 2). The pin groove of the second engagement member 58 is fixed on the back surface of the cassette holder 30 at a position where it can engage with the locking pin 51 when the cassette holder 30 is in the second fixing position (FIG. 4).
また、図２〜図４の例において、カセッテホルダ３０が第１の固定位置（図２）にある場合の第１係合部材５７のピン溝と、カセッテホルダ３０が第２の固定位置（図４）にある場合の第２係合部材５８のピン溝とが、トレイ２０に対して相対的にほぼ等しい場所に位置する。 2 to 4, the pin groove of the first engaging member 57 when the cassette holder 30 is in the first fixed position (FIG. 2), and the cassette holder 30 is in the second fixed position (see FIG. 2). The pin groove of the second engagement member 58 in the case of 4) is located at a position that is relatively equal to the tray 20.
係止ピン移動機構は、トレイ２０に対して係止ピン５１を相対的に移動させる。
カセッテホルダ３０が第１の固定位置（図２）にある場合、係止ピン移動機構は、第１係合部材５７のピン溝と係合する位置に係止ピン５１を移動させることによってカセッテホルダ３０を第１の固定位置（図２）にロックし、第１係合部材５７のピン溝との係合が外れる位置に係止ピン５１を移動させることによってカセッテホルダ３０のロックを解除する。
また、カセッテホルダ３０が第２の固定位置（図４）にある場合、係止ピン移動機構は、第２係合部材５８のピン溝と係合する位置に係止ピン５１を移動させることによってカセッテホルダ３０を第２の固定位置（図４）にロックし、第２係合部材５８のピン溝との係合が外れる位置に係止ピン５１を移動させることによってカセッテホルダ３０のロックを解除する。
The locking pin moving mechanism moves the locking pin 51 relative to the tray 20.
When the cassette holder 30 is in the first fixed position (FIG. 2), the locking pin moving mechanism moves the locking pin 51 to a position where it engages with the pin groove of the first engagement member 57, thereby moving the cassette holder. 30 is locked in the first fixed position (FIG. 2), and the lock of the cassette holder 30 is released by moving the locking pin 51 to a position where the engagement with the pin groove of the first engagement member 57 is released.
When the cassette holder 30 is in the second fixed position (FIG. 4), the locking pin moving mechanism moves the locking pin 51 to a position where it engages with the pin groove of the second engagement member 58. The cassette holder 30 is locked at the second fixed position (FIG. 4), and the lock pin 51 is moved to a position where the engagement with the pin groove of the second engagement member 58 is released, thereby unlocking the cassette holder 30. To do.
係止ピン移動機構は、例えば図２〜図４に示すように、係止ピン５１が固定されたリンク５４と、リンク５４を押して係止ピン５１を移動させるための押しボタン５６を含む。
リンク５４は、トレイ２０の裏面において軸５３を中心に回転可能に支持される。リンク５４に固定された係止ピン５１は、円弧状のピン孔５２を通ってトレイ２０の裏面側から正面側に突き出す。
As shown in FIGS. 2 to 4, for example, the locking pin moving mechanism includes a link 54 to which the locking pin 51 is fixed, and a push button 56 for pressing the link 54 to move the locking pin 51.
The link 54 is supported on the back surface of the tray 20 so as to be rotatable about the shaft 53. The locking pin 51 fixed to the link 54 protrudes from the back side of the tray 20 to the front side through the arc-shaped pin hole 52.
押しボタン５６は、蓋部２１に設けられた孔に案内されてリンク５４の端部へ届く位置に配置される。押しボタン５６を押し込むと、これに押されたリンク５４が軸５３を中心に回転し、これにより係止ピン５１が係合部（５７，５８）のピン溝から離れる方向に移動する。 The push button 56 is disposed at a position that is guided by a hole provided in the lid portion 21 and reaches the end portion of the link 54. When the push button 56 is pushed in, the link 54 pushed by this rotates around the shaft 53, whereby the locking pin 51 moves away from the pin groove of the engaging portion (57, 58).
リンク５４の一端は、押しボタン５６を押し込んだときに回転する方向と反対の方向へ回転力が加わるように、トレイ２０に固定されたバネ５５によって付勢される。これにより、押しボタン５６を離した状態では、係止ピン５１が係合部（５７，５８）のピン溝と係合する方向に移動する。この場合、係止ピン５１は、円弧状のピン孔５２の左端で止まった状態となる。 One end of the link 54 is biased by a spring 55 fixed to the tray 20 so that a rotational force is applied in a direction opposite to the direction of rotation when the push button 56 is pushed. Thereby, in a state where the push button 56 is released, the locking pin 51 moves in a direction to engage with the pin groove of the engaging portion (57, 58). In this case, the locking pin 51 is stopped at the left end of the arc-shaped pin hole 52.
ここで、上述した構成を有する本実施形態に係る放射線撮影装置において、トレイ２０上のカセッテホルダ３０を第１の固定位置（図２）から第２の固定位置（図４）へ移動させる場合の動作について説明する。 Here, in the radiographic apparatus according to the present embodiment having the above-described configuration, the cassette holder 30 on the tray 20 is moved from the first fixed position (FIG. 2) to the second fixed position (FIG. 4). The operation will be described.
カセッテホルダ３０が第１の固定位置（図２）にある場合、第１係合部材５７のピン溝に係止ピン５１が係合している。この場合、バネ５５の付勢によって係止ピン５１が係合位置に固定されるため、押しボタン５６を離しても係合状態が維持される。
この状態で押しボタン５６を押し込むと、リンク５４の一端が押しボタン５６により押され、リンク５４が軸５３を中心に回転する。これにより、係合ピン５１が第１係合部材５７のピン溝から離れて、カセッテホルダ３０のロックが解除される。
When the cassette holder 30 is in the first fixed position (FIG. 2), the locking pin 51 is engaged with the pin groove of the first engagement member 57. In this case, since the locking pin 51 is fixed to the engaged position by the bias of the spring 55, the engaged state is maintained even if the push button 56 is released.
When the push button 56 is pushed in this state, one end of the link 54 is pushed by the push button 56, and the link 54 rotates around the shaft 53. Thereby, the engaging pin 51 is separated from the pin groove of the first engaging member 57, and the cassette holder 30 is unlocked.
ロックが解除されると、カセッテホルダ３０は移動可能な状態になる。この状態でカセッテホルダ３０を手で持って図の反時計方向へ回すと、カセッテホルダ３０が姿勢を変えながら一定の軌道上を移動する。カセッテホルダ３０がある程度移動したところで押しボタン５６を離すと、係止ピン５１はバネ５５の付勢によってピン孔５２の左端に戻るが、このとき第１係合部材５７のピン溝が既に移動しているため、ロック解除の状態が維持される。 When the lock is released, the cassette holder 30 becomes movable. In this state, when the cassette holder 30 is held by hand and is turned counterclockwise in the figure, the cassette holder 30 moves on a fixed track while changing its posture. When the push button 56 is released after the cassette holder 30 has moved to some extent, the locking pin 51 returns to the left end of the pin hole 52 by the bias of the spring 55. At this time, the pin groove of the first engagement member 57 has already moved. Therefore, the unlocked state is maintained.
カセッテホルダ３０が第１の固定位置から第２の固定位置へ移動する間、カセッテホルダ３０の軌道と姿勢は可動連結部（４１，４２）によって安定に案内される。すなわち、軌道が変化したり姿勢がぐらついたりすることがなく、使用者が第２の固定位置を捜しながら移動させる必要がない。 While the cassette holder 30 moves from the first fixed position to the second fixed position, the track and posture of the cassette holder 30 are stably guided by the movable connecting portions (41, 42). That is, the trajectory does not change or the posture does not wobble, and the user does not have to move while searching for the second fixed position.
カセッテホルダ３０の隅が蓋部２１の側へ最も出っ張った状態でも、図３に示すように、カセッテホルダ３０は蓋部２１と接触しない。 Even in the state where the corner of the cassette holder 30 protrudes most to the lid portion 21 side, the cassette holder 30 does not contact the lid portion 21 as shown in FIG.
カセッテホルダ３０が第２の固定位置に近付くと、係止ピン５１が停止するピン孔５１の左端に第２係合部材５８の壁部が進入し、係止ピン５１と当接する。カセッテホルダ３０が更に第２の固定位置に近づくと、バネ５５によって付勢された係止ピン５１がこの壁部を摺動しながらピン溝に近付いていく。カセッテホルダ３０が第２の固定位置に到達すると、係止ピン５１が壁部からピン溝の中へ落ち込み、カセッテホルダ３０がロックされる（図４）。これにより、カセッテホルダ３０は、押しボタン５６を操作することなく第２の固定位置で自動的にロックされる。 When the cassette holder 30 approaches the second fixing position, the wall portion of the second engagement member 58 enters the left end of the pin hole 51 where the locking pin 51 stops and comes into contact with the locking pin 51. When the cassette holder 30 further approaches the second fixing position, the locking pin 51 biased by the spring 55 approaches the pin groove while sliding on the wall portion. When the cassette holder 30 reaches the second fixed position, the locking pin 51 falls from the wall portion into the pin groove, and the cassette holder 30 is locked (FIG. 4). Accordingly, the cassette holder 30 is automatically locked at the second fixed position without operating the push button 56.
カセッテホルダ３０を第２の固定位置から第１の固定位置へ移動させる場合は、押しボタン５６を押してロックを一旦解除させた後、カセッテホルダ３０を時計方向へ回す。その後、押しボタンを離した状態で第１の固定位置まで移動させることにより、上記と同様に係止ピン５１が第１係合部材５７の壁部を摺動してピン溝の中へ落ち込み、カセッテホルダ３０が第１の固定位置で自動的にロックされる。 When the cassette holder 30 is moved from the second fixed position to the first fixed position, the push button 56 is pressed to release the lock, and then the cassette holder 30 is rotated clockwise. Thereafter, by moving to the first fixed position with the push button released, the locking pin 51 slides on the wall portion of the first engaging member 57 and falls into the pin groove in the same manner as described above. The cassette holder 30 is automatically locked at the first fixed position.
以上説明したように、本実施形態に係る放射線撮影装置によれば、カセッテホルダ３０の短辺がトレイ２０の上側の辺に沿う固定位置（第１の固定位置：図２）と、カセッテホルダ３０の長辺がトレイ２０の上側の辺に沿う固定位置（第２の固定位置：図４）との間でカセッテホルダ３０を移動させる際、可動連結部によってカセッテホルダ３０の軌道と姿勢が案内される。
従って、従来のようにカセッテホルダを外して付け直すような手間が要らず、簡単にカセッテホルダ３０の姿勢を変更できる。また、カセッテホルダ３０の移動の過程で軌道が変化したり姿勢がぐらついたりすることがなく、最終的な固定位置（第１の固定位置又は第２の固定位置）を捜しながら移動させるような面倒がないため、例えば片手でも容易にカセットホルダ３０の姿勢を変更できる。
As described above, according to the radiation imaging apparatus of the present embodiment, the cassette holder 30 has a short side along the upper side of the tray 20 (first fixed position: FIG. 2), and the cassette holder 30. When the cassette holder 30 is moved between a fixed position along the upper side of the tray 20 (second fixed position: FIG. 4), the trajectory and posture of the cassette holder 30 are guided by the movable connecting portion. The
Therefore, there is no need to remove and reattach the cassette holder as in the prior art, and the posture of the cassette holder 30 can be easily changed. Further, the trajectory is not changed or the posture is not wobbled during the movement of the cassette holder 30, and it is troublesome to move the cassette holder 30 while searching for the final fixed position (first fixed position or second fixed position). For example, the posture of the cassette holder 30 can be easily changed with one hand.
また、本実施形態に係る放射線撮影装置によれば、カセッテホルダ３０が第１の固定位置（図２）にある場合、第１係合部材５７のピン溝と係合する位置へ向かって係止ピン５１が付勢されるとともに、カセッテホルダ３０が第２の固定位置（図４）にある場合、第２係合部材５８のピン溝と係合する位置へ向かって係止ピン５１が付勢される。
そして、カセッテホルダ３０が第１の固定位置の手前にあるとき、係止ピン５１が第１係合部材５７の壁部に当接してこれを摺動し、カセッテホルダ３０が第２の固定位置の手前にあるとき、係止ピン５１が第１係合部材５７の壁部に当接してこれを摺動する。
これにより、カセッテホルダ３０が第１の固定位置に到達した場合、その手前で第１係合部材５７の壁部を摺動した係止ピン５１がピン溝の中に落ちて自動的に係合状態となり、また、カセッテホルダ３０が第２の固定位置に到達した場合は、その手前で第２係合部材５８の壁部を摺動した係止ピン５１がピン溝の中に落ちて自動的に係合状態となる。
従って、ロック解除状態からロック状態へ自動的に移行できるため、カセットホルダ３０の姿勢の変更が更に容易となる。
Further, according to the radiographic apparatus according to the present embodiment, when the cassette holder 30 is in the first fixed position (FIG. 2), it is locked toward the position where the pin groove of the first engagement member 57 is engaged. When the pin 51 is biased and the cassette holder 30 is in the second fixed position (FIG. 4), the locking pin 51 is biased toward the position where it engages with the pin groove of the second engagement member 58. Is done.
When the cassette holder 30 is in front of the first fixed position, the locking pin 51 comes into contact with and slides on the wall portion of the first engaging member 57, and the cassette holder 30 is moved to the second fixed position. The locking pin 51 comes into contact with the wall portion of the first engaging member 57 and slides there.
As a result, when the cassette holder 30 reaches the first fixed position, the locking pin 51 that has slid on the wall portion of the first engaging member 57 before that falls into the pin groove and automatically engages. When the cassette holder 30 reaches the second fixed position, the locking pin 51 that has slid the wall portion of the second engagement member 58 in front of the cassette holder 30 falls into the pin groove and automatically Is engaged.
Therefore, since it is possible to automatically shift from the unlocked state to the locked state, the posture of the cassette holder 30 can be changed more easily.
更に、本実施形態に係る放射線撮影装置によれば、カセッテホルダ３０が第１の固定位置（図２）にある場合の第１係合部材５７のピン溝と、カセッテホルダ３０が第２の固定位置（図４）にある場合の第２係合部材５８のピン溝とが、トレイ２０に対して相対的にほぼ等しい場所に位置する。これにより、係合状態にあるときの係止ピン５１の停止位置を第１の固定位置と第２の固定位置とで共通化できるので、係止ピン移動機構による係止ピン５１の移動範囲を限定できるとともに、移動のストロークを短くできる。従って、係止ピン移動機構の構造を単純化できるとともにサイズを小型化できる。 Furthermore, according to the radiation imaging apparatus according to the present embodiment, the pin groove of the first engaging member 57 when the cassette holder 30 is at the first fixing position (FIG. 2), and the cassette holder 30 are the second fixed. The pin groove of the second engagement member 58 in the position (FIG. 4) is located at a position that is relatively equal to the tray 20. As a result, the stop position of the locking pin 51 when in the engaged state can be shared by the first fixed position and the second fixed position, so that the range of movement of the locking pin 51 by the locking pin moving mechanism can be increased. It can be limited and the stroke of movement can be shortened. Therefore, the structure of the locking pin moving mechanism can be simplified and the size can be reduced.
なお、本発明は上述した実施形態に限定されるものではなく、種々のバリエーションを含んでいる。 In addition, this invention is not limited to embodiment mentioned above, Various modifications are included.
上述の実施形態では、図５に示すように、滑車４１の凹条にカムリング４２の走行路を嵌めることによって滑車４１とカムリング４２を係合させているが、本発明はこれに限定されない。本発明の他の実施形態では、例えば図６の切断端面図において示すように、カムリング４２の走行路に沿って形成された凹条に滑車４１の周回部分を嵌め合わせることによって、滑車４１とカムリング４２とを係合させてもよい。この場合も、滑車４１は凹条に嵌った状態でカムリング４２の走行路を転がることが可能である。 In the above-described embodiment, as shown in FIG. 5, the pulley 41 and the cam ring 42 are engaged by fitting the traveling path of the cam ring 42 into the recess of the pulley 41, but the present invention is not limited to this. In another embodiment of the present invention, for example, as shown in the cut end view of FIG. 6, the pulley 41 and the cam ring are fitted by fitting the circumferential portion of the pulley 41 into a recess formed along the traveling path of the cam ring 42. 42 may be engaged. Also in this case, the pulley 41 can roll on the traveling path of the cam ring 42 in a state where the pulley 41 is fitted in the recess.
上述の実施形態では回転体として滑車を用いる例を挙げているが、本発明はこれに限定されない。回転体は、カムリングの走行路を転がりながら走行路と係合するものであれば良く、例えば球体や円筒体、円錐体など、任意の形態の回転体を用いることが可能である。 In the above-mentioned embodiment, although the example which uses a pulley as a rotary body is given, this invention is not limited to this. The rotating body only needs to be engaged with the traveling path while rolling on the traveling path of the cam ring. For example, a rotating body of an arbitrary form such as a spherical body, a cylindrical body, or a conical body can be used.
上述の実施形態では、滑車４１をカセッテホルダ３０上に配設し、カムリング４２をトレイ２０上に配設しているが、本発明はこれに限定されない。本発明の他の実施形態では、滑車４１をトレイ２０に配設し、カムリング４２をカセッテホルダ３０に配設してもよい。 In the above-described embodiment, the pulley 41 is disposed on the cassette holder 30 and the cam ring 42 is disposed on the tray 20, but the present invention is not limited to this. In another embodiment of the present invention, the pulley 41 may be disposed on the tray 20 and the cam ring 42 may be disposed on the cassette holder 30.
上述の実施形態では、カムリング４２の縁部に１本のループ状の走行路が形成されているが、本発明はこれに限定されない。本発明の他の実施形態では、カムリングの縁部に複数本のループ状の走行路を形成し、１つ又は複数の回転体がそれぞれのループの走行路を転がるようにしてもよい。また、走行路はループ状でなくてもよく、例えば、それぞれ１つ又は複数の回転体が転がる複数の走行路を回転体案内部に設けてもよい。 In the above-described embodiment, one loop-shaped traveling path is formed at the edge of the cam ring 42, but the present invention is not limited to this. In another embodiment of the present invention, a plurality of loop-shaped travel paths may be formed at the edge of the cam ring, and one or a plurality of rotating bodies may roll on the travel paths of the respective loops. In addition, the traveling path may not be a loop shape, and for example, a plurality of traveling paths on which one or a plurality of rotating bodies each roll may be provided in the rotating body guide section.
１…架台、２…基台、３…装置本体、４…ボルト、５…カセッテ、１０…トレイ収容部、１１…トレイ出入り口、２０…トレイ、２１…蓋部、２２…取手、３０…カセッテホルダ、４１…滑車、４２…カムリング、５１…係止ピン、５２…ピン孔、５３…軸、５４…リンク、５５…バネ、５６…押しボタン、５７…第１係止部材、５８…第２係止部材
DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Base, 3 ... Apparatus main body, 4 ... Bolt, 5 ... Cassette, 10 ... Tray accommodating part, 11 ... Tray entrance, 20 ... Tray, 21 ... Cover part, 22 ... Handle, 30 ... Cassette holder 41 ... pulley, 42 ... cam ring, 51 ... locking pin, 52 ... pin hole, 53 ... shaft, 54 ... link, 55 ... spring, 56 ... push button, 57 ... first locking member, 58 ... second engagement Stop member
Claims (7)
前記カセッテホルダが載せられたトレイと、
前記トレイを出し入れ自在に収容するトレイ収容部と、
前記トレイを前記トレイ収容部から引き出した状態で前記トレイ収容部のトレイ出入り口の外側に位置する前記トレイの側縁に立設され、前記トレイを前記トレイ収容部に収容した状態で前記トレイ出入り口を塞ぐ蓋部と、
前記カセッテホルダの一辺が上記トレイ上の所定の基準線に沿う第１の固定位置と、前記カセッテホルダの前記一辺に直交する他の一辺が前記所定の基準線に沿う第２の固定位置との間で、前記カセッテホルダが姿勢を変えながら移動することを可能にしつつ、前記カセッテホルダを前記トレイに連結するとともに、当該移動時の前記カセッテホルダの軌道と姿勢を案内する可動連結部と、
前記カセッテホルダが前記第１の固定位置または前記第２の固定位置にあるとき、前記カセッテホルダを前記トレイ上において解除可能にロックするロック部と、
を有し、
前記可動連結部は、
複数の回転体と、
前記回転体が転がりながら係合するループ状の走行路が外周に形成された回転体案内部と、
を含み、
前記走行路は、その形状が円形の場合に比べて、前記第１の固定位置から前記第２の固定位置への前記カセッテホルダの移動過程で前記蓋部の側へ最も出っ張った状態になったときの前記カセッテホルダの隅を前記蓋部から遠ざけて、当該隅と前記蓋部とを接触させないように前記軌道と前記姿勢を案内する、非円形の形状に形成されており、
前記複数の回転体及び前記回転体案内部の一方が前記トレイに、他方が前記カセッテホルダに設けられている、
放射線撮影装置。 A cassette holder to which a rectangular plate-like cassette containing an imaging body for capturing an image of radiation is mounted;
A tray on which the cassette holder is placed;
A tray accommodating portion for accommodating the tray in a removable manner;
The tray is erected on the side edge of the tray located outside the tray entrance / exit of the tray accommodating portion in a state where the tray is pulled out from the tray accommodating portion, and the tray entrance / exit is opened in the state where the tray is accommodated in the tray accommodating portion. A lid that closes;
A first fixed position in which one side of the cassette holder is along a predetermined reference line on the tray, and a second fixed position in which another side perpendicular to the one side of the cassette holder is along the predetermined reference line The cassette holder is connected to the tray while allowing the cassette holder to move while changing the posture, and a movable connecting portion that guides the track and posture of the cassette holder during the movement,
A lock portion for releasably locking the cassette holder on the tray when the cassette holder is in the first fixed position or the second fixed position;
Have
The movable connecting portion is
A plurality of rotating bodies;
A rotating body guide portion formed on the outer periphery of a loop-shaped traveling path that engages while the rotating body rolls;
Including
Compared with the case where the shape of the traveling path is circular, the traveling path is in a state of protruding most toward the lid portion in the process of moving the cassette holder from the first fixed position to the second fixed position. When the corner of the cassette holder is away from the lid portion, the track and the posture are guided so as not to contact the corner and the lid portion, and is formed in a non-circular shape,
One of the plurality of rotating bodies and the rotating body guide portion is provided on the tray, and the other is provided on the cassette holder.
Radiography equipment.
請求項１に記載の放射線撮影装置。 Having four of the rotating bodies disposed on the tray or the cassette holder in a positional relationship corresponding to the four vertices of a square;
The radiation imaging apparatus according to claim 1.
又は、
前記回転体案内部の前記走行路に沿って凹条が形成され、前記回転体が前記凹条に嵌った状態で前記走行路を転がる、
請求項１又は２に記載の放射線撮影装置。 A recess is formed along the rotating direction of the rotating body, and the rotating body rolls on the traveling path in a state where the traveling path of the rotating body guide portion is fitted in the recess.
Or
A groove is formed along the traveling path of the rotating body guide, and the rotating body rolls on the traveling path in a state of being fitted to the recessed line.
The radiation imaging apparatus according to claim 1 or 2 .
請求項３に記載の放射線撮影装置。 3 or more of the rotating bodies such that an interval between any one of the rotating bodies and another rotating body adjacent thereto is narrower than a minimum width of an outer shape of the loop formed by the traveling path. Is placed,
The radiation imaging apparatus according to claim 3.
係止片と、
前記カセッテホルダにおいて、前記カセッテホルダが前記第１の固定位置にある場合に前記係止片と係合可能な位置に固定された第１係合部と、
前記カセッテホルダにおいて、前記カセッテホルダが前記第２の固定位置にある場合に前記係止片と係合可能な位置に固定された第２係合部と、
前記トレイに対して前記係止片を相対的に移動させる係止片移動機構であって、前記カセッテホルダが前記第１の固定位置にある場合、前記第１係合部に係合する位置と当該係合が外れる位置との間で前記係止片を移動させ、前記カセッテホルダが前記第２の固定位置にある場合、前記第２係合部に係合する位置と当該係合が外れる位置との間で前記係止片を移動させる係止片移動機構と、
を有する、
請求項４に記載の放射線撮影装置。 The lock part is
A locking piece;
In the cassette holder, when the cassette holder is in the first fixed position, a first engagement portion fixed at a position engageable with the locking piece;
In the cassette holder, when the cassette holder is in the second fixed position, a second engaging portion fixed at a position engageable with the locking piece;
A locking piece moving mechanism for moving the locking piece relative to the tray, wherein when the cassette holder is in the first fixed position, a position for engaging with the first engagement portion; When the locking piece is moved between a position where the engagement is disengaged and the cassette holder is in the second fixed position, a position where it engages with the second engaging portion and a position where the engagement is disengaged A locking piece moving mechanism for moving the locking piece between
Having
The radiation imaging apparatus according to claim 4.
請求項５に記載の放射線撮影装置。 The relative position of the first engaging portion with respect to the tray when the cassette holder is in the first fixed position, and the second engaging portion when the cassette holder is in the second fixed position. The first engagement portion and the second engagement portion are arranged on the cassette holder so that the relative position with respect to the tray becomes equal.
The radiation imaging apparatus according to claim 5.
前記第１係合部は、前記カセッテホルダが前記第１の固定位置へ到達する手前で前記係止片が摺動する壁部を有し、
前記第２係合部は、前記カセッテホルダが前記第２の固定位置へ到達する手前で前記係止片が摺動する壁部を有する、
請求項６に記載の放射線撮影装置。 When the cassette holder is in the first fixed position, the locking piece moving mechanism urges the locking piece toward a position where it engages with the first engagement portion, and the cassette holder An urging means for urging the locking piece toward a position where it engages with the second engaging portion when in the second fixed position;
The first engagement portion has a wall portion on which the locking piece slides before the cassette holder reaches the first fixed position,
The second engagement portion has a wall portion on which the locking piece slides before the cassette holder reaches the second fixed position.
The radiation imaging apparatus according to claim 6.
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