JP2009058733A - Radiographic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a cassette type radiographic device constituted by: housing a radiation detection panel for detecting radiation transmitted through a subject, a control substrate and a battery in a cassette; and having an external member for battery exchange, the external member being detached when the battery is exchanged, wherein the external member for battery exchange is surely fixed on an external member to which the external member for battery exchange is fit without increasing the thickness of the external member, and its fixing is easily released. <P>SOLUTION: The radiographic device constituted by housing the radiation detection panel for detecting the radiation transmitted through the subject, the control substrate and the battery in the cassette has the external member for battery exchange which is fixed on the external member constituting the cassette with electric releasable adhesive, and whose fixing is released when the battery is exchanged. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radiographic imaging apparatus that obtains a radiographic image from digital information obtained by detecting radiation transmitted through a subject.

  Radiation images typified by X-ray images have been widely used for disease diagnosis, nondestructive inspection, and the like.

  Recently, radiation imaging systems that detect radiation transmitted through a subject with a radiation detection panel and obtain a radiation image from the obtained digital information are also frequently used.

  The cassette type radiographic image capturing device is a name of a portable radiation image capturing device in which the radiation detection panel, a control board related thereto, and the like are housed in one thin box-shaped container (cassette).

  The cassette type radiographic image capturing apparatus is prepared in a plurality of sizes so as to match the size of the subject to be imaged.

  Such a cassette type radiographic imaging apparatus is located at a location corresponding to the situation of the patient to be imaged and at a desired position in addition to the normal imaging performed by loading it in a stationary imaging apparatus in the imaging room. It is also possible to perform imaging by arranging a cassette type radiographic imaging device.

  For example, a cassette type radiographic imaging device may be laid on the lower part of the patient, or in some cases, the patient may stand on it.

  However, with such an increase in use, an unexpected situation in which the cassette type radiographic imaging apparatus is dropped on the floor during handling also increases.

  Therefore, the cassette of the cassette type radiographic imaging apparatus needs to have a structure having sufficient strength and capable of absorbing an impact that does not transmit the impact applied from the outside to the contents as it is.

  Carbon fiber resin and aluminum alloy are adopted as exterior members that constitute the cassette because it must not attenuate the radiation that passes through the subject and reaches the radiation detection panel, and because it needs to be as light as possible. Often done.

  The radiation detection panel accommodated in the inside has a standardized size corresponding to the subject of interest, and the size of the cassette is determined in advance from the relationship with the apparatus in which the cassette is loaded.

  Therefore, in order to increase the strength of the cassette, simply increasing the thickness of the exterior that constitutes the cassette, it is provided between the exterior member and the radiation detection panel, which is a very weak container for impact, and the electronic components related thereto. It will narrow the space.

  As a result, there is a high possibility that the impact applied to the exterior member is directly transmitted to the accommodation, and the risk of damage to the accommodation increases.

  Moreover, since the increase in the thickness of the exterior member results in an increase in the mass of the cassette type radiographic imaging apparatus, the portability is also lowered.

  In order to cope with such a problem, there is also a proposal (for example, refer to Patent Document 1) that the inside of the cassette is filled with a filler.

  However, in order to respond to the exchange of the contents inside the cassette or the inspection and repair in the event of a failure, the cassette must have a structure that can be divided and opened as necessary. It is desirable that there are no items that obstruct work.

  In the case where a battery is stored in the cassette, even if the battery can be charged by external power supply, it is necessary to replace the battery in order to cope with the deterioration of charging characteristics.

  In many cases, the battery replacement cycle does not coincide with the replacement cycle of other items, and in order to facilitate replacement work, a battery replacement exterior member is provided on the exterior member having an opening for taking in and out the battery. (For example, refer to Patent Document 2).

  The battery replacement exterior member removed for such battery replacement is fixed to other members of the cassette by screws or claws during use.

  In order to securely fix the battery replacement exterior member with screws or claws and withstand the impact applied from the outside, it is necessary to provide a sufficient thickness for the fixing portion that receives the screws and claws.

In particular, in the case of a resin member, a sufficient thickness is required, resulting in an increase in the thickness of the exterior member and the member for fixing them, which may lead to the problems described above.
JP 2004-184679 A JP 2006-250729 A

  The present invention has been made in view of the situation as described above, and an object thereof is to house a radiation detection panel for detecting radiation transmitted through a subject, a control board, and a battery in a cassette, and to be removed when the battery is replaced. A radiographic imaging device having a battery replacement exterior member, wherein the battery replacement exterior member is securely fixed to the exterior member without increasing the thickness of the exterior member into which the battery replacement exterior member is fitted. In addition, an object of the present invention is to realize a cassette type radiographic imaging apparatus that can be easily released.

The above-mentioned subject is achieved by realizing the following invention.
1. A radiographic imaging device that houses a radiation detection panel that detects radiation transmitted through a subject, a control board, and a battery in a cassette,
A radiographic imaging apparatus comprising: a battery replacement exterior member that is fixed by an electro-releasable adhesive and is released when the battery is replaced, among the exterior members constituting the cassette.
2. Both the battery replacement exterior member and the member for fixing the battery replacement exterior member with an electro-releasable adhesive are both conductive members or members to which conductive members are joined, and both members are opposed to each other. 2. The radiographic imaging device according to item 1, wherein the surface is bonded with an electrically peelable adhesive.
3. 3. The radiographic imaging apparatus according to claim 1 or 2, further comprising a power receiving unit for applying a voltage from the outside of the cassette to the two surfaces joined by the electro-releasable adhesive.
4). The radiographic imaging apparatus according to any one of claims 1 to 3, wherein the battery replacement exterior member is integrated with a battery.

  According to the present invention, it is possible to reliably fix the battery replacement exterior member to be removed at the time of battery replacement to the exterior member without increasing the thickness of the exterior member constituting the cassette, and easily fix it when necessary. A cassette-type radiation image capturing apparatus that can cancel the above is realized.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a cassette type radiographic image capturing apparatus D.

  As shown in the figure, the cassette K of this example is composed of two main exterior members, that is, an upper exterior member 5 and a lower exterior member 6.

  A display device H and an operation button E are provided at one corner of the upper exterior member 5, and a main connector MC for receiving power supply and exchanging information with an external device is provided on one side surface. Is provided.

  Although not shown in FIG. 1, the lower surface of the lower exterior member 6 has an opening for taking in and out the battery and a battery replacement exterior member that is fitted and fixed to the opening. .

  FIG. 2 is a conceptual diagram illustrating an internal configuration of the cassette type radiographic image capturing apparatus D.

  Inside the cassette K, a radiation detection panel 1, a panel support plate 2, a control board 3, a connection cable 4, a battery B, and the like are accommodated.

  The radiation detection panel 1 includes a phosphor 11 and a photoelectric conversion unit 12.

  The phosphor 11 receives radiation incident from the direction of the arrow a in the figure and emits light according to the intensity of the received radiation. The phosphor 11 is coated with a phosphor on a resin plate.

  The photoelectric conversion unit 12 includes photoelectric conversion elements arranged in a lattice pattern on a glass plate. The photoelectric conversion unit 12 receives light emitted from the phosphor 11 and converts it into an electrical signal.

  The electrical signal output from the photoelectric conversion unit 12 is sent to the control board 3 via the connection cable 4 which is a flexible circuit board. The control board 3 is based on the electrical signal sent from the photoelectric conversion unit 12. Captured image information is generated.

  The panel support plate 2 supports the radiation detection panel 1 and the control board 3, and has flatness and rigidity necessary for maintaining the flatness of the radiation detection panel 1.

  The battery B is housed in a battery housing member 72 that is joined to the lower exterior member 6, and is covered with a battery replacement exterior member 70 and fixed. The battery B housed in the battery housing member 72 is electrically connected to the control board 3 through a contact portion (not shown).

  The upper exterior member 5 of the cassette K should not be a shield when the radiation traveling from the direction of the arrow a in the figure reaches the radiation detection panel 1.

  Therefore, a material having high radiation permeability and excellent strength, for example, a resin containing carbon fiber is employed.

  The lower exterior member 6 supports the radiation detection panel 1 via support members 21 and 23, and the battery replacement exterior member 70 holds the battery B so that the battery B does not jump out due to an impact. It is fixed.

  The lower exterior member 6 and the battery replacement exterior member 70 are also often made of a resin containing carbon fiber in the same manner as the upper exterior member 5 in terms of securing strength and reducing the weight, but have high radiation permeability. Therefore, a light alloy such as an aluminum alloy may be employed.

  The upper exterior member 5 and the lower exterior member 6 constituting the cassette K must be able to protect the contents against impacts applied from the outside, and should not be easily separated.

  However, for regular maintenance work or repair work in response to an unexpected failure, there is also a requirement that it can be easily separated and the contained items can be removed. Must be met.

  In particular, since replacement of the battery B often does not coincide with other stored items, it is desirable to provide a battery replacement exterior member 70 that can be individually removed for the work.

  The battery replacement exterior member 70 provided for such a purpose needs to satisfy the requirement that it can be securely fixed as required, and can be easily removed as well as the strength.

  Generally, in order to meet such requirements, the battery replacement exterior member 70 is fixed with screws.

  FIG. 3 is an example of a joint portion of the battery replacement exterior member 70 fixed with screws.

  The screws used for the joining use ISO standard M2 to M3 screws, but the lower exterior so as to withstand the repeated removal of the screw 91 and withstand the impact applied through the screw 91. The screw receiving portion A provided on the member 6 and the lower exterior member 6 that holds the screw receiving portion A need to have sufficient thicknesses W1, 2, 4, and 5.

  Further, the screw head protruding from the lower surface of the battery replacement exterior member 70 causes inconvenience in use, and therefore the thickness W3 of the screw fixing portion of the battery replacement exterior member 70 cannot be increased too much. The conditions may give a problem in strength to the battery replacement exterior member 70.

  In particular, when a screw groove is cut in a resin exterior member, it is desirable to use a thicker screw so that the screw thread is not damaged when the exterior member is removed. 2 needs to be larger.

  Furthermore, increasing the size of the screw leads to a problem that the thickness of the wall thickness W3 and the thickness of the battery replacement exterior member 70 must be increased.

  However, the surface dimensions of the radiation detection panel 1 and the external dimensions of the cassette K are determined in advance by the standard according to the relationship with the photographed image size and the apparatus in which the cassette is loaded. Increasing the value will narrow the gap between the cassette exterior member and the stored items including the radiation detection panel 1.

  This reduction in the gap makes it difficult to absorb the shock that prevents the shock applied to the cassette K from being transmitted to the radiation detection panel 1.

  In order to avoid an increase in the thickness of the exterior member related to screwing, it is conceivable that the battery replacement exterior member 70 and the lower exterior member 6 are joined by fitting without using screws, but they are detached from impact. The danger is often high and the desired reliability is often not obtained.

  In the present invention, the battery replacement exterior member 70 is joined to the lower exterior member 6 with an electrically peelable adhesive, thereby securely fixing the battery B without increasing the thickness of the joint portion. Accordingly, the fixing is easily released, and the battery replacement exterior member 70 is removed from the lower exterior member 6.

  FIG. 4 is a view for explaining a joint portion in which the battery replacement exterior member 70 is joined to the lower exterior member 6 with an electro-releasable adhesive.

  A plate-like conductive member 71 is fixed to the joint surface S4 of the battery replacement exterior member 70 with an adhesive, and a plate-like conductive member 61 is adhered to the joint surface S1 of the lower exterior member 6. It is fixed with an agent.

  The conductive member 71 and the conductive member 61 are arranged to face each other, and are joined by an electro-releasable adhesive P indicated by oblique lines in the drawing.

  The bonding between the conductive member and the exterior member on the surfaces S1 and S4 is a bonding that cannot be separated, and is not limited to bonding using an adhesive, but may be mechanical bonding using a pin or the like.

  In the present embodiment, both the battery replacement exterior member 70 and the lower exterior member 6 are non-conductive members, but one member is a conductive member such as an aluminum alloy and is bonded to the member. The conductive member can be omitted.

  The battery replacement exterior member 70 and the lower exterior member 6 are electrically connected to the surface S3 of the conductive member 71 joined to the battery replacement exterior member 70 and the surface S2 of the conductive member 61 joined to the lower exterior member 6. After the peelable adhesive B is applied, the surfaces of these conductors are bonded through the electric peelable adhesive B.

  Actually, it may take time for the electro-releasable adhesive to harden and exhibit sufficient adhesive strength, and the battery replacement exterior member 70 and the lower exterior member 6 are fixed with a jig or the like for a long time. Sometimes it is necessary.

  In such a case, a member obtained by joining the conductive member 61 and the conductive member 71 in advance with the surfaces S2 and 3 with an electro-releasable adhesive is prepared, and the battery replacement is performed via the joined member. The exterior member 70 and the lower exterior member 6 may be joined on the surfaces S1 and S4 with an instantaneous adhesive or the like.

  By the above-described method, the productivity of the cassette type radiation imaging apparatus can be increased and the bonding reliability can be improved without being limited by the curing rate of the electro-releasable adhesive.

  FIG. 5 is a diagram for explaining joining and separation by an electro-releasable adhesive.

  The conductive member 61 and the conductive member 71 are joined by an electro-releasable adhesive indicated by a hatched portion in the drawing.

  When a voltage as shown by a dotted line is applied between the conductive member 61 and the conductive member 71 in the joined state on the surfaces S2 and S3 shown in FIG. 5A, the two members are shown in FIG. 5B. As shown in FIG. 2, the surface is separated on the + side surface (surface S3 in this example) of the electro-peelable adhesive.

  In addition, the well-known electro-releasable adhesive (for example, brand name elect release, Taiyo Wire Net Co., Ltd.) marketed can be used for the above-mentioned electro-peelable adhesive. Further, the voltage to be applied and the application time are determined by experiments.

  FIG. 6 is a diagram showing an arrangement relationship between the opening provided in the lower exterior member 6, the battery D, and the battery replacement exterior member 70.

  The battery B may be housed in the battery housing member 72 fixed to the lower exterior member 6 or the panel support plate 2 as shown in FIGS. 2 and 6 from the opening provided in the lower exterior member 6. The battery replacement exterior member 70 and the battery may be integrated.

  This is because the battery B, which has a larger mass than other electronic components housed in the cassette, is supported by the battery replacement exterior member 70, and other accommodation of impact applied to the battery B is performed. It has the effect of reducing transmission to things.

  How the battery replacement exterior member 70 and the battery are integrated is determined at the time of design.

  As described above, the battery replacement exterior member 70 using the electrically peelable adhesive and the lower exterior member 6 are bonded to each other while maintaining the reliability of the connection compared to the connection using screws. The thickness can be reduced.

  Moreover, the request | requirement of wanting to isolate | separate the battery-exterior exterior member 70 and the lower exterior member 6 which were mutually joined as needed can be responded.

  FIG. 7 is a diagram showing a power receiving unit that receives a voltage applied from the outside between a conductive member 71 joined to the battery replacement exterior member 70 and a conductive member 61 joined to the lower exterior member 6. It is.

  The power receiving unit is an outlet having two holes R1 and 2 for receiving power for receiving a plug for applying voltage.

  The outlet hole R1 electrically connects one of the terminals of the plug to the conductive member 71 joined to the battery replacement exterior member 70, and the other hole R2 is joined to the lower exterior member 6. The terminal of the plug is electrically connected to the conductive member 61.

  Note that one of the terminals of the power supply plug is configured to contact only one of the conductive members 61 and 71.

  Further, in order to electrically shut off the outlet from the outside when the power receiving means is not used, a blocking member 73 that can be inserted into the power receiving outlet may be provided.

  By providing the blocking member 73, an erroneous voltage application to the outlet is prevented, and unexpected separation of the battery replacement exterior member 70 and the lower exterior member 6 is prevented.

It is an external view of a cassette type radiographic imaging device. It is a conceptual diagram explaining the internal structure of a cassette type | mold radiographic imaging apparatus. It is an example of the junction part of the battery replacement | exchange exterior member fixed with the screw | thread. It is a figure explaining the junction part which joined the exterior member for battery replacement to the lower exterior member with the electrodetachable adhesive. It is a figure explaining joining and isolation | separation by an electric peelable adhesive agent. It is a figure which shows the arrangement | positioning relationship of an opening part, a battery, and the exterior member for battery replacement. It is a figure which shows the power receiving part which receives the voltage applied from the outside.

Explanation of symbols

70 Battery Replacement Exterior Member B Battery D Cassette Type Radiation Imaging Device K Cassette P Electrically Peelable Adhesive

Claims (4)

A radiographic imaging device that contains a radiation detection panel that detects radiation transmitted through a subject, a control board, and a battery in a cassette,
A radiographic imaging apparatus comprising: a battery replacement exterior member that is fixed by an electro-releasable adhesive and is released when the battery is replaced, among the exterior members constituting the cassette. Both the battery replacement exterior member and the member for fixing the battery replacement exterior member with an electro-releasable adhesive are both conductive members or members to which conductive members are joined, and both members are opposed to each other. The radiographic imaging device according to claim 1, wherein the surface having adhesiveness is adhered with an electro-releasable adhesive. The radiographic imaging apparatus according to claim 1, further comprising a power receiving unit for applying a voltage from the outside of the cassette on the two surfaces joined by the electro-releasable adhesive. The radiographic imaging apparatus according to claim 1, wherein the battery replacement exterior member is integrated with a battery.

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