JP2013000396A - Packing material for open-type magnetic resonance imaging apparatus - Google Patents

Packing material for open-type magnetic resonance imaging apparatus Download PDF

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JP2013000396A
JP2013000396A JP2011135287A JP2011135287A JP2013000396A JP 2013000396 A JP2013000396 A JP 2013000396A JP 2011135287 A JP2011135287 A JP 2011135287A JP 2011135287 A JP2011135287 A JP 2011135287A JP 2013000396 A JP2013000396 A JP 2013000396A
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magnetic
magnetic field
yoke
magnetic circuit
leakage
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JP5758710B2 (en
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Toyoisa Takeda
豊功 武田
Hiroyuki Azuma
裕順 吾妻
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Yoshida Dental Mfg Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a packing material for an open-type magnetic resonance imaging apparatus, capable of sufficiently preventing leakage magnetic field, enabling magnetic bodies to be easily attached and detached from a magnetic circuit, and changing the size of package during transportation.SOLUTION: The packing material 1 for packing the magnetic circuit 100 of the open-type magnetic resonance imaging apparatus includes: leakage magnetic field preventing members 20 to be attached to a box 10 for housing the magnetic circuit 100 or to a yoke 110. The leakage magnetic field preventing members 20 each have a non-magnetic spacer 21 detachably attached to the outer surface of the box 10, and magnetic bodies 22 attached to the non-magnetic spacer 21. The magnetic bodies 22 are disposed with intervals from the magnetic circuit 100.

Description

本発明は、オープン型のＭＲＩ装置（磁気共鳴イメージング装置）の磁気回路を搬送または保管するときに、磁気回路を梱包するための梱包部材に関する。   The present invention relates to a packing member for packing a magnetic circuit when the magnetic circuit of an open MRI apparatus (magnetic resonance imaging apparatus) is transported or stored.

ＭＲＩ装置では磁気回路に永久磁石を用いているため、ＭＲＩ装置を稼動していないときでも、磁気回路の周囲に漏洩磁場が生じている。したがって、磁気回路を搬送するときには、搬送経路に設置された電子機器が漏洩磁場の影響を受けないように、漏洩磁場の強度を低減させる必要がある。   Since the MRI apparatus uses a permanent magnet for the magnetic circuit, a leakage magnetic field is generated around the magnetic circuit even when the MRI apparatus is not operating. Therefore, when the magnetic circuit is transported, it is necessary to reduce the strength of the leakage magnetic field so that the electronic device installed in the transport path is not affected by the leakage magnetic field.

従来、磁気回路を搬送するときには、木板や非磁性層と磁性層を積層した板によって磁気回路を梱包している（例えば、特許文献１および特許文献２参照）。   Conventionally, when a magnetic circuit is transported, the magnetic circuit is packed by a wooden board or a board in which a nonmagnetic layer and a magnetic layer are laminated (see, for example, Patent Document 1 and Patent Document 2).

特許２９６５９６８号公報Japanese Patent No. 2965968 特許４３９７３１０号公報Japanese Patent No. 4397310

前記した従来の磁気回路の梱包では、搬送経路に移動不可能な電子機器が設置されている場合や、搬送経路が途中で狭くなる場合を考慮して、梱包サイズを予め小さくしている。したがって、従来の磁気回路の梱包では、磁気回路と板が接触または近接しており、漏洩磁場の強度が大きい領域が板よりも外側に広がるため、漏洩磁場を抑制する効果が小さいという問題がある。
また、板が磁性層を備えている構成では、磁気回路から板に作用する吸引力（磁着力）が大きくなるため、板を磁気回路から取り外し難くなるという問題がある。 In the conventional packing of the magnetic circuit, the packing size is reduced in advance in consideration of a case where an electronic device that cannot be moved is installed in the transport path or a case where the transport path becomes narrow in the middle. Therefore, the conventional magnetic circuit packaging has a problem that the effect of suppressing the leakage magnetic field is small because the magnetic circuit and the plate are in contact with or close to each other and the region where the leakage magnetic field strength is large spreads outside the plate. .
Further, in the configuration in which the plate includes the magnetic layer, there is a problem that it is difficult to remove the plate from the magnetic circuit because the attractive force (magnetization force) acting on the plate from the magnetic circuit is increased.

本発明では、前記した問題を解決し、漏洩磁場を十分に抑制するとともに、磁性体を磁気回路から簡単に着脱することができ、搬送の途中で梱包サイズを変えることができるオープン型磁気共鳴イメージング装置用の梱包部材を提供することを課題とする。   The present invention solves the above-described problems, sufficiently suppresses the leakage magnetic field, and can easily attach / detach the magnetic material to / from the magnetic circuit, and can change the packing size during transportation. It is an object to provide a packaging member for an apparatus.

前記課題を解決するため、本発明は、ヨークの開口部内に永久磁石が設けられた磁気回路を梱包するものであり、オープン型磁気共鳴イメージング装置用の梱包部材であって、前記磁気回路を収容するための箱体と、前記箱体に取り付けられる漏洩磁場抑制部材と、を備え、前記漏洩磁場抑制部材は、前記箱体の外面に着脱自在な非磁性体のスペーサと、前記スペーサに取り付けられた磁性体と、を有し、前記磁性体は前記磁気回路に対して間隔を空けて配置されることを特徴としている。   In order to solve the above problems, the present invention is to pack a magnetic circuit in which a permanent magnet is provided in an opening of a yoke, and is a packing member for an open type magnetic resonance imaging apparatus, which contains the magnetic circuit. And a leakage magnetic field suppressing member attached to the box, the leakage magnetic field suppressing member being attached to the outer surface of the box and a non-magnetic spacer, and attached to the spacer. A magnetic body, wherein the magnetic body is disposed at a distance from the magnetic circuit.

また、本発明の他の構成は、ヨークの開口部内に永久磁石が設けられた磁気回路を梱包するものであり、オープン型磁気共鳴イメージング装置用の梱包部材であって、前記ヨークに取り付けられる漏洩磁場抑制部材を備え、前記漏洩磁場抑制部材は、前記ヨークの外面に着脱自在な非磁性体のスペーサと、前記スペーサに取り付けられた磁性体と、を有し、前記磁性体は前記磁気回路に対して間隔を空けて配置されることを特徴としている。   According to another aspect of the present invention, there is provided a packing member for an open type magnetic resonance imaging apparatus for packing a magnetic circuit in which a permanent magnet is provided in an opening of a yoke, and a leakage attached to the yoke. A magnetic field suppression member, and the leakage magnetic field suppression member includes a nonmagnetic spacer that is detachable from an outer surface of the yoke, and a magnetic body attached to the spacer, and the magnetic body is attached to the magnetic circuit. It is characterized in that it is arranged with an interval.

これらの構成では、磁性体を磁気回路に対して間隔を空けて配置することで、磁気回路からの漏洩磁場の強度が大きい領域が、磁性体に効果的に引き付けられるため、梱包用の材料を大幅に増加することなく、梱包部材の周囲の漏洩磁場を十分に抑制することができる。   In these configurations, by arranging the magnetic body at a distance from the magnetic circuit, an area where the strength of the leakage magnetic field from the magnetic circuit is effectively attracted to the magnetic body. Without significantly increasing, the leakage magnetic field around the packing member can be sufficiently suppressed.

また、磁性体と磁気回路を間隔を空けて配置することで、磁気回路から磁性体に作用する吸引力（磁着力）が小さくなるため、漏洩磁場抑制部材を箱体またはヨークから取り外し易くなる。
したがって、漏洩磁場抑制部材を箱体またはヨークに対して簡単に着脱することができるため、搬送経路の幅に合わせて、搬送の途中で梱包サイズを適宜に変えることができる。また、磁気回路と磁性体との間に介設する非磁性体を少なくすることができるため、梱包部材を軽量化することができる。 In addition, by arranging the magnetic body and the magnetic circuit at an interval, an attractive force (magnetization force) acting on the magnetic body from the magnetic circuit is reduced, so that the leakage magnetic field suppressing member can be easily removed from the box or the yoke.
Therefore, since the leakage magnetic field suppressing member can be easily attached to and detached from the box or the yoke, the packing size can be appropriately changed during the transfer according to the width of the transfer path. Moreover, since the nonmagnetic material interposed between the magnetic circuit and the magnetic material can be reduced, the packaging member can be reduced in weight.

前記した梱包部材において、前記ヨークの開口部が前方および左右方向から被験者の撮影対象部位を挿入可能に形成されている場合には、前記磁性体を前記ヨークの開口部の左右側方に配置し、前記磁性体を前記ヨークの開口部よりも前後方向および上下方向に大きく形成することで、漏洩磁場を確実に抑制することができる。
さらに、前記磁性体を前記ヨークよりも前後方向および上下方向に大きく形成することで、漏洩磁場をより確実に抑制することができる。 In the packing member described above, when the opening of the yoke is formed so that the subject to be imaged can be inserted from the front and left and right directions, the magnetic body is disposed on the left and right sides of the opening of the yoke. By forming the magnetic body larger in the front-rear direction and the up-down direction than the opening of the yoke, the leakage magnetic field can be reliably suppressed.
Furthermore, the leakage magnetic field can be more reliably suppressed by forming the magnetic body larger in the front-rear direction and the vertical direction than the yoke.

前記した梱包部材において、前記漏洩磁場抑制部材を前記磁気回路に対して移動可能に構成した場合には、漏洩磁場抑制装置を磁気回路から取り外すことなく、磁気回路と磁性体の間隔を変えることができるため、梱包サイズを簡単に変えることができる。   In the packaging member described above, when the leakage magnetic field suppressing member is configured to be movable with respect to the magnetic circuit, the interval between the magnetic circuit and the magnetic body can be changed without removing the leakage magnetic field suppressing device from the magnetic circuit. This makes it easy to change the packaging size.

前記した梱包部材において、前記磁性体を板状に形成した場合には、磁性体を軽量化することができる。   In the packaging member described above, when the magnetic body is formed in a plate shape, the weight of the magnetic body can be reduced.

本発明の磁気共鳴イメージング装置用の梱包部材では、漏洩磁場を十分に抑制することができるため、搬送経路や保管場所に設置された電子機器に、漏洩磁場が与える影響を防ぐことができる。
また、搬送の途中で梱包サイズを適宜に変えることができるため、搬送経路に移動不可能な電子機器が設置されている場合や、搬送経路が途中で狭くなる場合でも、磁気回路をスムーズに搬送することができる。 Since the leakage magnetic field can be sufficiently suppressed in the packing member for the magnetic resonance imaging apparatus of the present invention, it is possible to prevent the influence of the leakage magnetic field on the electronic devices installed in the transport path and the storage location.
In addition, since the packing size can be changed appropriately during transportation, the magnetic circuit can be transported smoothly even when non-movable electronic devices are installed in the transportation path or when the transportation path becomes narrower. can do.

本実施形態の梱包部材を示した斜視図である。It is the perspective view which showed the packaging member of this embodiment. 本実施形態の箱体に磁気回路を収容した状態を示した斜視図である。It is the perspective view which showed the state which accommodated the magnetic circuit in the box of this embodiment. 本実施形態の漏洩磁場抑制部材を示した図で、（ａ）は分解斜視図、（ｂ）は正面図、（ｃ）は平面図である。It is the figure which showed the leakage magnetic field suppression member of this embodiment, (a) is a disassembled perspective view, (b) is a front view, (c) is a top view. 本実施形態の磁気回路をハンドリフトに積載した状態を示した側面図である。It is the side view which showed the state which loaded the magnetic circuit of this embodiment on the handlift. 本実施形態の磁気回路を搬送する態様を示した図で、（ａ）は梱包部材を最大幅に設定した状態の平面図、（ｂ）は梱包部材の片側を縮小した状態の平面図、（ｃ）は梱包部材を最小幅に設定した状態の平面図である。It is the figure which showed the aspect which conveys the magnetic circuit of this embodiment, (a) is a top view in the state which set the packaging member to the maximum width, (b) is a top view in the state which reduced the one side of the packaging member, c) is a plan view of a state in which the packing member is set to a minimum width. 他の実施形態の梱包部材を示した図で、スペーサの縦板にリブを設けた構成の斜視図である。It is the figure which showed the packaging member of other embodiment, and is a perspective view of the structure which provided the rib in the vertical board of the spacer. 他の実施形態の梱包部材を示した図で、スペーサがヨークの上面に取り付けられる構成の斜視図である。It is the figure which showed the packaging member of other embodiment, and is a perspective view of the structure by which a spacer is attached to the upper surface of a yoke.

本発明の実施形態について、適宜図面を参照しながら詳細に説明する。
本実施形態の梱包部材１は、図１に示すように、オープン型のＭＲＩ装置の磁気回路１００を搬送または保管するときに梱包するものである。 Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, the packaging member 1 of the present embodiment is a package for transporting or storing the magnetic circuit 100 of an open type MRI apparatus.

磁気回路１００は、図２に示すように、前方および左右側方に開口した開口部１２０が形成され、側面視でコの字形状に形成されたヨーク（継鉄）１１０と、開口部１２０内に設けられた上下一対の永久磁石１３０，１３０と、ヨーク１１０を支持する脚部１４０と、を備えた所謂ガントリであり、開口部１２０の前方および左右側方から被験者の撮影対象部位（患部）を挿入可能となっている。
このように、永久磁石１３０を用いた磁気回路１００では、ＭＲＩ装置を稼動していないときでも、磁気回路１００の周囲に漏洩磁場が生じている。 As shown in FIG. 2, the magnetic circuit 100 includes an opening 120 that is open to the front and left and right sides, a yoke 110 that is formed in a U-shape when viewed from the side, and an inside of the opening 120. A so-called gantry comprising a pair of upper and lower permanent magnets 130 and 130 provided on the leg and a leg portion 140 that supports the yoke 110, and a subject to be imaged (affected part) from the front and left and right sides of the opening 120. Can be inserted.
Thus, in the magnetic circuit 100 using the permanent magnet 130, a leakage magnetic field is generated around the magnetic circuit 100 even when the MRI apparatus is not operating.

梱包部材１は、図１に示すように、磁気回路１００を収容するための箱体１０と、箱体１０の上面１１に取り付けられる左右二つの漏洩磁場抑制部材２０，２０と、を備えている。
箱体１０は、図２に示すように、木材等の非磁性体によって形成された直方体の箱であり、下面が開口している。この箱体１０をヨーク１１０に被せた状態では、箱体１０によってヨーク１１０全体が覆われ、脚部１４０が箱体１０の下方に露出する。
箱体１０の上面１１には、前後左右の四隅に対応する位置に、四つのねじ穴１１ａが形成されている。 As shown in FIG. 1, the packaging member 1 includes a box 10 for housing the magnetic circuit 100, and two left and right leakage magnetic field suppressing members 20, 20 attached to the upper surface 11 of the box 10. .
As shown in FIG. 2, the box 10 is a rectangular parallelepiped box formed of a non-magnetic material such as wood, and the lower surface is opened. In a state where the box body 10 is put on the yoke 110, the entire yoke body 110 is covered by the box body 10, and the leg portions 140 are exposed below the box body 10.
Four screw holes 11a are formed in the upper surface 11 of the box 10 at positions corresponding to the four corners of the front, rear, left and right.

漏洩磁場抑制部材２０は、図１に示すように、箱体１０の上面１１に着脱自在なスペーサ２１と、スペーサ２１に取り付けられた磁性体２２と、を備えている。
なお、左右二つの漏洩磁場抑制部材２０，２０は、左右対称の構成であるため、以下の説明では、箱体１０を前方から見たときに右側に配置される漏洩磁場抑制部材２０について詳細に説明し、左側に配置される漏洩磁場抑制部材２０の説明は省略する。 As shown in FIG. 1, the leakage magnetic field suppressing member 20 includes a spacer 21 detachably attached to the upper surface 11 of the box 10 and a magnetic body 22 attached to the spacer 21.
Since the two left and right leakage magnetic field suppressing members 20 and 20 have a bilaterally symmetrical configuration, in the following description, the leakage magnetic field suppressing member 20 disposed on the right side when the box 10 is viewed from the front will be described in detail. A description of the leakage magnetic field suppressing member 20 disposed on the left side will be omitted.

スペーサ２１には、図３（ａ）および（ｂ）に示すように、水平に配置された長方形の横板２１ａと、横板２１ａの外端部に垂直に形成された長方形の縦板２１ｂと、を備えている。横板２１ａおよび縦板２１ｂは、木材等の非磁性体によって形成されている。   As shown in FIGS. 3A and 3B, the spacer 21 includes a rectangular horizontal plate 21a arranged horizontally, and a rectangular vertical plate 21b formed perpendicular to the outer end of the horizontal plate 21a. It is equipped with. The horizontal plate 21a and the vertical plate 21b are formed of a nonmagnetic material such as wood.

横板２１ａは、箱体１０の上面１１に載置して取り付けられる部位であり、図３（ｃ）に示すように、前後方向の長さは上面１１と同じ長さに形成されている。また、横板２１ａの内端部を上面１１の左右方向の中間位置に配置したときに、縦板２１ｂと箱体１０の側面が間隔を空けて配置されるように、横板２１ａの左右方向の長さが設定されている（図３（ｃ）参照）。   The horizontal plate 21a is a part that is mounted on and mounted on the upper surface 11 of the box 10, and the length in the front-rear direction is the same as that of the upper surface 11 as shown in FIG. Further, when the inner end portion of the horizontal plate 21a is arranged at the middle position in the left-right direction of the upper surface 11, the horizontal plate 21a is arranged in the left-right direction so that the side surfaces of the vertical plate 21b and the box 10 are spaced apart from each other. Is set (see FIG. 3C).

横板２１ａには、二つの取付穴２１ｃ，２１ｃが前後方向に間隔を空けて形成されている。取付穴２１ｃは、上下方向に貫通するとともに、左右方向に延ばされた長穴である。両取付穴２１ｃ，２１ｃは、横板２１ａを箱体１０の上面１１に載置したときに、上面１１のねじ穴１１ａ（図２参照）にそれぞれ連通するように形成されている。   Two mounting holes 21c and 21c are formed in the horizontal plate 21a at intervals in the front-rear direction. The attachment hole 21c is a long hole that penetrates in the vertical direction and extends in the horizontal direction. Both mounting holes 21c and 21c are formed so as to communicate with the screw holes 11a (see FIG. 2) on the upper surface 11 when the horizontal plate 21a is placed on the upper surface 11 of the box body 10, respectively.

縦板２１ｂは、図３（ｂ）に示すように、両平面が左右に向けて配置されている。縦板２１ｂは、横板２１ａよりも上側に突出した部位よりも、横板２１ａよりも下側に突出した部位が大きく形成されている。
この縦板２１ｂは、図１に示すように、ヨーク１１０の開口部１２０の左右側方に配置され、開口部１２０よりも前後方向および上下方向に大きく、さらには、ヨーク１１０の側面よりも前後方向および上下方向に大きく形成されている。
また、縦板２１ｂは、図３（ｃ）に示すように、横板２１ａよりも後方に突出し、ヨーク１１０よりも後方に大きく形成されている。 As shown in FIG. 3B, the vertical plate 21b is arranged such that both planes face left and right. The vertical plate 21b is formed such that a portion protruding below the horizontal plate 21a is larger than a portion protruding above the horizontal plate 21a.
As shown in FIG. 1, the vertical plate 21 b is disposed on the left and right sides of the opening 120 of the yoke 110, is larger in the front-rear direction and the vertical direction than the opening 120, and is further front-rear than the side surface of the yoke 110. It is greatly formed in the direction and the vertical direction.
Further, as shown in FIG. 3C, the vertical plate 21 b protrudes rearward from the horizontal plate 21 a and is formed larger rearward than the yoke 110.

前記した漏洩磁場抑制部材２０では、図１に示すように、横板２１ａを箱体１０の上面１１に載置し、横板２１ａの上側から取付穴２１ｃに挿入した取付ボルト２１ｄを、上面１１のねじ穴１１ａ（図２参照）に螺合させることで、スペーサ２１を箱体１０に取り付けることができる。   In the above-described leakage magnetic field suppressing member 20, as shown in FIG. 1, the horizontal plate 21 a is placed on the upper surface 11 of the box 10, and the mounting bolt 21 d inserted into the mounting hole 21 c from the upper side of the horizontal plate 21 a is connected to the upper surface 11. The spacer 21 can be attached to the box 10 by being screwed into the screw hole 11a (see FIG. 2).

また、漏洩磁場抑制部材２０は、両取付ボルト２１ｄ，２１ｄを緩めた状態で、スペーサ２１を両取付穴２１ｃ，２１ｃに沿って左右方向に移動可能となっている。そして、箱体１０に対するスペーサ２１の位置を調整した後に、取付ボルト２１ｄを締め込むことで、スペーサ２１を箱体１０の上面１１に位置決めすることができる。   Further, the leakage magnetic field suppressing member 20 can move the spacer 21 in the left-right direction along both the mounting holes 21c and 21c in a state where both the mounting bolts 21d and 21d are loosened. And after adjusting the position of the spacer 21 with respect to the box 10, the spacer 21 can be positioned on the upper surface 11 of the box 10 by tightening the mounting bolt 21d.

磁性体２２は、スペーサ２１の縦板２１ｂの外面に貼り付けられた板状の部材であり、本実施形態では、図３（ａ）に示すように、縦板２１ｂよりも薄く形成された複数の鋼板２２ａによって構成されている。
具体的には、縦板２１ｂの外面全体を覆うように三枚の鋼板２２ａを三箇所に配置し、さらに、一枚の鋼板２２ａに対して、同じ形状の鋼板２２ａを二枚重ねている。このように、磁性体２２は、九枚の鋼板２２ａによって構成されている。 The magnetic body 22 is a plate-like member affixed to the outer surface of the vertical plate 21b of the spacer 21, and in this embodiment, as shown in FIG. 3A, a plurality of magnetic bodies 22 are formed thinner than the vertical plate 21b. Steel plate 22a.
Specifically, three steel plates 22a are arranged at three locations so as to cover the entire outer surface of the vertical plate 21b, and two steel plates 22a having the same shape are stacked on one steel plate 22a. Thus, the magnetic body 22 is comprised by the nine steel plates 22a.

磁性体２２は、磁気回路１００からの漏洩磁場を引き付けることで、梱包部材１の周囲の漏洩磁場の強度を低下させるものである。
磁性体２２の厚さや面積は限定されるものではないが、本実施形態では、図５（ａ）に示すように、縦板２１ｂを箱体１０の側面から最も離した状態、つまり、梱包部材１を最大幅に設定した状態で、漏洩磁場の強度が大きい領域が磁性体２２に効果的に引き付けられ、漏洩磁場の強度が低下するように、磁性体２２の厚さや面積が設定されている。
なお、本実施形態の磁性体２２のように、ヨーク１１０の側面よりも前後方向および上下方向に大きく形成することで、漏洩磁場の強度を確実に低下させることができる。
具体的には、漏洩磁場抑制部材２０の縦板２１ｂから左右側方に３３０ｍｍ離れた位置（永久磁石１３０（図１参照）の中心位置からは１１００ｍｍ離れた位置）で、漏洩磁場の強度が５Ｇ以下となるように、磁性体２２の厚さや面積を設定することが好ましい。 The magnetic body 22 reduces the strength of the leakage magnetic field around the packing member 1 by attracting the leakage magnetic field from the magnetic circuit 100.
Although the thickness and area of the magnetic body 22 are not limited, in the present embodiment, as shown in FIG. 5A, the vertical plate 21b is the most separated from the side surface of the box body 10, that is, a packing member. In a state where 1 is set to the maximum width, the thickness and area of the magnetic body 22 are set so that a region where the strength of the leakage magnetic field is large is effectively attracted to the magnetic body 22 and the strength of the leakage magnetic field is reduced. .
In addition, like the magnetic body 22 of this embodiment, the strength of the leakage magnetic field can be reliably reduced by forming it larger in the front-rear direction and the vertical direction than the side surface of the yoke 110.
Specifically, the intensity of the leakage magnetic field is 5 G at a position 330 mm away from the vertical plate 21 b of the leakage magnetic field suppressing member 20 to the left and right sides (a position 1100 mm away from the center position of the permanent magnet 130 (see FIG. 1)). It is preferable to set the thickness and area of the magnetic body 22 so as to be as follows.

次に、本実施形態の梱包部材１を用いた磁気回路１００の搬送方法について、病院の廊下を通過させて搬送する場合を例として説明する。
まず、図２に示すように、ヨーク１１０に箱体１０を被せるとともに、図１に示すように、箱体１０の上面１１に両漏洩磁場抑制部材２０，２０を取り付け、梱包部材１が最大幅となるように、両漏洩磁場抑制部材２０，２０を箱体１０に固定する。 Next, a method for transporting the magnetic circuit 100 using the packing member 1 according to the present embodiment will be described by taking as an example a case of transporting through a hospital hallway.
First, as shown in FIG. 2, the box body 10 is put on the yoke 110, and as shown in FIG. 1, both leakage magnetic field suppressing members 20, 20 are attached to the upper surface 11 of the box body 10, so that the packing member 1 has the maximum width. Both leakage magnetic field suppressing members 20 and 20 are fixed to the box 10 so that

梱包部材１によって梱包された磁気回路１００を、図４に示すように、ハンドリフト２００の積載面２１０に載置する。これにより、作業者は手押しで磁気回路１００を移動可能となる。そして、図５（ａ）に示すように、磁気回路１００を廊下３００で移動させる。なお、図５ではハンドリフト２００（図４参照）の図示を省略している。
このとき、磁気回路１００からの漏洩磁場が磁性体２２に引き付けられることで、梱包部材１の周囲の漏洩磁場が抑制され、漏洩磁場の強度が低減されるため、漏洩磁場が搬送経路に設置された電子機器に与える影響を防ぐことができる。 As shown in FIG. 4, the magnetic circuit 100 packed by the packing member 1 is placed on the loading surface 210 of the handlift 200. Thereby, the operator can move the magnetic circuit 100 by hand. Then, as shown in FIG. 5A, the magnetic circuit 100 is moved in the hallway 300. In addition, illustration of the handlift 200 (refer FIG. 4) is abbreviate | omitted in FIG.
At this time, since the leakage magnetic field from the magnetic circuit 100 is attracted to the magnetic body 22, the leakage magnetic field around the packing member 1 is suppressed and the strength of the leakage magnetic field is reduced. Can be prevented from affecting electronic equipment.

図５（ｂ）に示すように、廊下３００に設置された移動不可な電子機器３１０が、梱包部材１の片側（進行方向の右側）に干渉する場合には、電子機器３１０側（進行方向の右側）の漏洩磁場抑制部材２０を、箱体１０の内側（進行方向の左側）に向けて移動させて、梱包サイズを小さくする。これにより、磁気回路１００は電子機器３１０の側方を通過することができる。なお、梱包サイズを小さくした状態でも、磁気回路１００からの漏洩磁場は磁性体２２に引き付けられるため、漏洩磁場抑制部材２０を用いないときよりも、梱包部材１の周囲の漏洩磁場を抑制し、漏洩磁場の強度を低減することができる。   As shown in FIG. 5B, when the non-movable electronic device 310 installed in the hallway 300 interferes with one side (the right side of the traveling direction) of the packing member 1, the electronic device 310 side (the traveling direction) The leakage magnetic field suppression member 20 on the right side is moved toward the inside of the box 10 (left side in the traveling direction) to reduce the packaging size. Thereby, the magnetic circuit 100 can pass the side of the electronic device 310. Even in a state where the packing size is reduced, the leakage magnetic field from the magnetic circuit 100 is attracted to the magnetic body 22, so that the leakage magnetic field around the packing member 1 is suppressed compared to when the leakage magnetic field suppression member 20 is not used. The intensity of the leakage magnetic field can be reduced.

さらに、図５（ｃ）に示す区間３２０のように、両壁の間が狭くなり、両壁が梱包部材１の両側に干渉する場合には、両漏洩磁場抑制部材２０，２０を、箱体１０の内側に向けて移動させて、梱包サイズを最も小さくする。これにより、磁気回路１００は区間３２０を通過することができる。   Further, as shown in a section 320 shown in FIG. 5C, when both walls are narrowed and both walls interfere with both sides of the packaging member 1, both leakage magnetic field suppressing members 20, 20 are connected to the box. 10. Move to the inside of 10 to make the packing size the smallest. Thereby, the magnetic circuit 100 can pass through the section 320.

図５（ｂ）および（ｃ）に示すように、梱包部材１を小さくして移動させた後は、漏洩磁場抑制部材２０を箱体１０の外側に移動させることで、梱包部材１を最大幅に戻すことができる。   As shown in FIGS. 5B and 5C, after moving the packing member 1 to a smaller size, the leakage magnetic field suppressing member 20 is moved to the outside of the box body 10, so that the packing member 1 has the maximum width. Can be returned to.

なお、両漏洩磁場抑制部材２０，２０を箱体１０の内側に移動させ、梱包部材１を最小幅に設定した状態よりも、搬送経路の通行可能な幅が狭い場合には、漏洩磁場抑制部材２０を箱体１０から取り外すことで、梱包サイズを更に小さくすることができる。
本実施形態の漏洩磁場抑制部材２０は、図１に示すように、取付ボルト２１ｄによって、箱体１０の上面１１に取り付けられているため、漏洩磁場抑制部材２０を箱体１０に対して簡単に着脱することができる。 In addition, when both the leakage magnetic field suppression members 20 and 20 are moved to the inner side of the box 10 and the packing member 1 is set to the minimum width and the transportable path is narrower, the leakage magnetic field suppression member. By removing 20 from the box 10, the packing size can be further reduced.
As shown in FIG. 1, the leakage magnetic field suppressing member 20 of the present embodiment is attached to the upper surface 11 of the box body 10 with mounting bolts 21 d, so that the leakage magnetic field suppressing member 20 is easily attached to the box body 10. Detachable.

以上のような梱包部材１によれば、図１に示すように、磁性体２２を磁気回路１００に対して間隔を空けて配置することで、磁気回路１００からの漏洩磁場の強度が大きい領域が、磁性体２２に効果的に引き付けられるため、梱包部材１の周囲の漏洩磁場を十分に抑制することができる。
したがって、梱包用の材料を大幅に増加することなく、梱包部材１の周囲の漏洩磁場の強度を低減することができるため、搬送経路や保管場所に設置された電子機器に、漏洩磁場が与える影響を防ぐことができる。 According to the packaging member 1 as described above, as shown in FIG. 1, by arranging the magnetic body 22 at an interval from the magnetic circuit 100, there is a region where the strength of the leakage magnetic field from the magnetic circuit 100 is large. Since the magnetic body 22 is effectively attracted, the leakage magnetic field around the packing member 1 can be sufficiently suppressed.
Therefore, since the strength of the leakage magnetic field around the packaging member 1 can be reduced without significantly increasing the packaging material, the influence of the leakage magnetic field on the electronic devices installed in the transport path and storage location Can be prevented.

また、漏洩磁場抑制部材２０は、箱体１０に対して左右方向にスライド可能に構成されている。さらに、磁性体２２と磁気回路１００の間隔を空けて配置することで、磁気回路１００から磁性体２２に作用する吸引力（磁着力）が小さくなっており、漏洩磁場抑制部材２０は箱体１０に対して着脱自在に構成されている。
このように、梱包部材１では、搬送の途中で磁気回路１００の梱包サイズを適宜に変えることができるため、図５（ｂ）および（ｃ）に示すように、搬送経路が途中で狭くなる場合でも、磁気回路１００をスムーズに搬送することができる。 The leakage magnetic field suppressing member 20 is configured to be slidable in the left-right direction with respect to the box 10. Further, by disposing the magnetic body 22 and the magnetic circuit 100 at an interval, the attractive force (magnetization force) acting on the magnetic body 22 from the magnetic circuit 100 is reduced, and the leakage magnetic field suppressing member 20 is the box 10. It is comprised so that attachment or detachment is possible.
Thus, in the packaging member 1, since the packaging size of the magnetic circuit 100 can be appropriately changed during the conveyance, as shown in FIGS. 5B and 5C, the conveyance path becomes narrow in the middle. However, the magnetic circuit 100 can be transported smoothly.

また、磁気回路１００から磁性体２２に作用する吸引力が小さいため、磁気回路１００と磁性体２２との間に介設する非磁性体を少なくすることができ、さらに、磁性体２２は板状に形成されているため、梱包部材１を軽量化することができる。   In addition, since the attractive force acting on the magnetic body 22 from the magnetic circuit 100 is small, the number of non-magnetic bodies interposed between the magnetic circuit 100 and the magnetic body 22 can be reduced, and the magnetic body 22 is plate-shaped. Therefore, the packaging member 1 can be reduced in weight.

以上、本発明の実施形態について説明したが、本発明は前記実施形態に限定されることなく、その趣旨を逸脱しない範囲で適宜に変更が可能である。
例えば、図６に示す梱包部材１Ａの漏洩磁場抑制部材２０のように、スペーサ２１の縦板２１ｂの外周縁部に、内側に向けてリブ２１ｅを立設し、横板２１ａがリブ２１ｅの内側に嵌め込まれるように形成した場合には、スペーサ２１の強度を高めることができる。 The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, like the leakage magnetic field suppressing member 20 of the packing member 1A shown in FIG. 6, ribs 21e are erected on the outer peripheral edge of the vertical plate 21b of the spacer 21, and the horizontal plate 21a is inside the rib 21e. When it is formed so as to be fitted in the spacer 21, the strength of the spacer 21 can be increased.

また、図１に示すスペーサ２１の縦板２１ｂの外周縁部に、延長用の平板を取り付け可能に構成してもよい。この構成では、延長用の平板に鋼板２２ａを貼り付けることで、磁性体２２を拡張することができ、搬送経路や保管場所の環境に合わせて、漏洩磁場を抑制する範囲を広げることができる。   Moreover, you may comprise so that an extension flat plate can be attached to the outer peripheral edge part of the vertical board 21b of the spacer 21 shown in FIG. In this configuration, the magnetic body 22 can be expanded by sticking the steel plate 22a to the extending flat plate, and the range for suppressing the leakage magnetic field can be expanded in accordance with the environment of the conveyance path and the storage location.

また、図７に示すように、左右二つの漏洩磁場抑制部材２０，２０によって梱包部材１Ｂを構成してもよい。この構成では、ヨーク１１０の上面１１０ａに形成されたねじ穴に取付ボルト２１ｄを螺合させることで、両漏洩磁場抑制部材２０，２０をヨーク１１０の上面１１０ａに直接取り付けている。   In addition, as shown in FIG. 7, the packaging member 1 </ b> B may be configured with two left and right leakage magnetic field suppressing members 20, 20. In this configuration, both leakage magnetic field suppressing members 20 and 20 are directly attached to the upper surface 110 a of the yoke 110 by screwing the mounting bolts 21 d into the screw holes formed in the upper surface 110 a of the yoke 110.

１ 梱包部材
１０ 箱体
１１ 上面
１１ａ ねじ穴
２０ 漏洩磁場抑制部材
２１ スペーサ
２１ａ 横板
２１ｂ 縦板
２１ｃ 取付穴
２１ｄ 取付ボルト
２２ 磁性体
２２ａ 鋼板
１００ 磁気回路
１１０ ヨーク
１２０ 開口部
１３０ 永久磁石
１４０ 脚部
２００ ハンドリフト
３００ 廊下
３１０ 電子機器 DESCRIPTION OF SYMBOLS 1 Packing member 10 Box 11 Upper surface 11a Screw hole 20 Leakage magnetic field suppression member 21 Spacer 21a Horizontal plate 21b Vertical plate 21c Mounting hole 21d Mounting bolt 22 Magnetic body 22a Steel plate 100 Magnetic circuit 110 York 120 Opening part 130 Permanent magnet 140 Leg part 200 Handlift 300 Corridor 310 Electronic equipment

Claims (6)

ヨークの開口部内に永久磁石が設けられた磁気回路を梱包するための梱包部材であって、
前記磁気回路を収容するための箱体と、
前記箱体に取り付けられる漏洩磁場抑制部材と、を備え、
前記漏洩磁場抑制部材は、
前記箱体の外面に着脱自在な非磁性体のスペーサと、
前記スペーサに取り付けられた磁性体と、を有し、
前記磁性体は前記磁気回路に対して間隔を空けて配置されることを特徴とするオープン型磁気共鳴イメージング装置用の梱包部材。 A packing member for packing a magnetic circuit in which a permanent magnet is provided in an opening of a yoke,
A box for housing the magnetic circuit;
A leakage magnetic field suppressing member attached to the box,
The leakage magnetic field suppressing member is
A non-magnetic spacer detachably attached to the outer surface of the box,
A magnetic body attached to the spacer,
A packing member for an open type magnetic resonance imaging apparatus, wherein the magnetic body is disposed at a distance from the magnetic circuit. ヨークの開口部内に永久磁石が設けられた磁気回路を梱包するための梱包部材であって、
前記ヨークに取り付けられる漏洩磁場抑制部材を備え、
前記漏洩磁場抑制部材は、
前記ヨークの外面に着脱自在な非磁性体のスペーサと、
前記スペーサに取り付けられた磁性体と、を有し、
前記磁性体は前記磁気回路に対して間隔を空けて配置されることを特徴とするオープン型磁気共鳴イメージング装置用の梱包部材。 A packing member for packing a magnetic circuit in which a permanent magnet is provided in an opening of a yoke,
A leakage magnetic field suppressing member attached to the yoke;
The leakage magnetic field suppressing member is
A non-magnetic spacer detachably attached to the outer surface of the yoke;
A magnetic body attached to the spacer,
A packing member for an open type magnetic resonance imaging apparatus, wherein the magnetic body is disposed at a distance from the magnetic circuit. 前記ヨークの開口部は、前方および左右方向から被験者の撮影対象部位を挿入可能に形成されており、
前記磁性体は、前記ヨークの開口部の左右側方に配置され、前記ヨークの開口部よりも前後方向および上下方向に大きいことを特徴とする請求項１または請求項２に記載のオープン型磁気共鳴イメージング装置用の梱包部材。 The opening of the yoke is formed so that a subject to be imaged can be inserted from the front and left and right directions.
3. The open type magnetic according to claim 1, wherein the magnetic body is disposed on the left and right sides of the opening of the yoke and is larger in the front-rear direction and the up-down direction than the opening of the yoke. A packing member for a resonance imaging apparatus. 前記磁性体は、前記ヨークよりも前後方向および上下方向に大きいことを特徴とする請求項３に記載のオープン型磁気共鳴イメージング装置用の梱包部材。   The packing member for an open type magnetic resonance imaging apparatus according to claim 3, wherein the magnetic body is larger in the front-rear direction and the vertical direction than the yoke. 前記漏洩磁場抑制部材は、前記磁気回路に対して移動可能であることを特徴とする請求項１から請求項４のいずれか一項に記載のオープン型磁気共鳴イメージング装置用の梱包部材。   The packing member for an open type magnetic resonance imaging apparatus according to any one of claims 1 to 4, wherein the leakage magnetic field suppression member is movable with respect to the magnetic circuit. 前記磁性体は、板状に形成されていることを特徴とする請求項１から請求項５のいずれか一項に記載のオープン型磁気共鳴イメージング装置用の梱包部材。   The packing member for an open type magnetic resonance imaging apparatus according to any one of claims 1 to 5, wherein the magnetic body is formed in a plate shape.
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