JPH0727465Y2 - Film cassette holder for X-ray photography - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a film cassette holder for X-ray photography, and particularly to a film cassette holder for X-ray photography, which is provided so as to be insertable into and removable from an insertion space formed in the holder. The present invention relates to an improvement of a cassette tray in which a film cassette prepared for each film size is detachably mounted.

[Conventional technology]

In the case of a reader imaging stand that performs X-ray photography, a grid frame that holds an X-ray photography grid, a fixed-side frame that is juxtaposed on the back side of the grid frame, and an insertion space formed between these frames are provided. An X-ray film cassette holder, such as a cassette tray for detachably mounting a film cassette prepared for each film size for loading an X-ray film, is provided so that it can be inserted and removed along the surface direction. It is provided so that it can be moved up and down on a pillar standing upright. In such an imaging table, the cassette holder is an important part for properly performing X-ray imaging, and conventionally, various cassette holders having various structures have been proposed.

For example, if an ultra-high grid density grid is used as the above-mentioned grid in this type of cassette holder, the grid movement by the Bucky mechanism at the time of the conventional X-ray imaging is unnecessary, and the X-ray scattering is prevented while keeping the stationary state. The film can be transmitted to the film side, and a sharp X-ray image can be obtained to provide a highly diagnostic image. In particular, if such an ultra-high grid density grid is configured to be in close contact with the film during X-ray photography, the closer it is to the contact, the clearer the image can be obtained. There is known a structure in which a frame and a cassette tray are movably supported so that the cassette is brought into close contact with the grid during photographing.

[Problems to be solved by the device]

By the way, one of the conventional problems in the film cassette holder for X-ray photography as described above is
There is a mounting structure for a cassette of a film cassette loaded with a film for radiography. That is, as the film for X-ray photography, a plurality of types such as six-section, four-section, large-quarter cutting, large-angle cutting, and half-cutting are used.
Different film sizes are prepared. Therefore, in order to detachably attach a plurality of types of film cassettes having different sizes to the cassette tray that is inserted into and removed from the holder, and hold the cassette tray, regardless of the size, There is a need for a structure that can be freely and simply and securely mounted and held. However, the conventionally known cassette receiving structure on the cassette tray has a large number of component parts, and the operation for sandwiching and holding the cassette is also troublesome, and there is a problem in terms of structure and operability. It was one with.

That is, in general, in the past, a plurality of fixing holes were provided in the central portion on the cassette tray, and a supporting member for supporting the lower end side of the cassette was fixed to a required position with a screw or the like, and both left and right sides of the tray were fixed. Therefore, a pair of holding members slidably supported in the central portion for sandwiching the cassette are provided so as to interlock with each other by a link mechanism or the like, and a lock means is attached to a part thereof.
However, in such a configuration, the mounting position of the support member is changed according to the size of the cassette to be used, or the cassette is supported by the support member,
A troublesome operation such as sliding the pressing member from both the left and right sides with a lever operation etc. to press it, and then locking and fixing it with a lock operation is required, and the problem of poor operability cannot be avoided due to the large number of component parts. Things
It is desired to take some measures to eliminate such problems.

[Means for Solving the Problems]

In order to meet such a demand, the film cassette holder for X-ray photography according to the present invention is arranged along the surface direction in the insertion space between the grid frame having the grid and the fixed side frame arranged in parallel on the back side thereof. It is equipped with a cassette tray that can be inserted and removed, and a film cassette that is prepared for each film size that is detachably mounted on the front side of the tray with multiple types of films loaded. An upper catch that hooks and locks is provided at the upper end of the tray, and a cassette receiving body that has a lower lock that hooks and locks the lower end of the cassette is provided at the upper end of the tray. It supports up and down freely with the urging force applied, and the lower locking part of this cassette receiver is used for a plurality of types of cassettes formed for each film size. It is obtained so as to form stepwise by a supporting stepped portion for supporting at least both sides in the width direction at the end side.

[Action]

According to the present invention, the cassette to be mounted on the tray is hooked and locked to the corresponding support step portion of the cassette receiving body which is biased upward, and the receiving body is lowered downward against the biasing force. It can be mounted very easily by pushing down and hooking the upper end side to the upper locking part of the tray, and this cassette can be moved up and down by the upward biasing force acting on the receiving body. It is securely attached and held while being sandwiched from the direction.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIGS. 1 to 5 show an embodiment of the film cassette holder for X-ray photography according to the present invention, and the film cassette holder for X-ray photography shown in FIG. As shown in Figures and 5,
A fixed-side frame 11 that can be lifted up and down via a pedestal part or the like on a column part of an imaging stand (not shown)
A grid frame (13) is provided on the front side of the (11) side by side with a predetermined gap and holds an ultra-high grid density grid (12) and the like. Incidentally, 14 is a chin rest attached to the center of the upper end of the grid frame 13. Further, 15 and 15 are slide rails fixed to the fixed-side frame 11 via a mounting bracket or the like.
11 It is installed in parallel in the horizontal direction on the upper and lower ends of the front surface.

Reference numeral 20 is a film cassette having a size suitable for the size of a film loaded with a plurality of types of X-ray film (not shown), and 21 is a plurality of these types of cassettes.
Is a cassette tray having a cassette receiving portion 22 for detachably mounting the slide rails 15, 1 on the back side thereof.
The slide rails 23, 23 are configured by 5 so as to be freely inserted into and removed from either the left side or the right side of the holder 10 (the right side in the drawing as shown in FIG. 4 etc. in this embodiment) is fixed by a mounting bracket or the like. . In the figure, 24 is a handle for inserting / removing the cassette tray 20, 24a is a stopper bracket for regulating the insertion end end, and although not shown, stopper means for regulating the tray 21 from coming out of the holder 10. Is also attached as appropriate.

Now, the film cassette holder for X-ray photography according to the present invention
According to 10, the cassette tray 21 is provided so as to be insertable and removable along the surface direction in the insertion space between the grid frame 13 and the fixed-side frame 11 arranged in parallel on the back side thereof, and a plurality of types of X-ray photography. X-ray film cassette 20 prepared for each film size that is detachably mounted on the front side of the cassette tray 21 in a state in which each film is loaded.
And an upper locking portion 30 for hooking and locking the upper end side of the cassette 20, as shown in FIGS. 1 to 3.
The cassette tray 32 is provided at the upper end of the cassette tray 21 and has a lower engaging portion 31 which is opposed to the upper end and engages and engages the lower end of the cassette 20.
A tension spring 33 constantly applies an upward biasing force to the lower portion of the tray 21 to support the tray 21 in the widthwise center of the tray 21 so that the tray 21 can move up and down.
A plurality of types of cassettes 20 formed for each film size are formed in a stepwise manner by left and right support steps 34a, 34b; 35a, 35b; It has features.

In FIG. 1, reference numeral 39 is a vertical groove for guide formed vertically in the widthwise central portion of the tray 21, and a key member 40a integrally provided on the receiving body 32 is slidable in the vertical groove 39. The tension spring is movably held and is attached to the rear side of the tension spring.
A spring receiver 40 for locking the lower end of the tray 33 is integrally connected with a screw or the like, and is arranged so that the tension spring 33 is stretched between the spring holder 40 and the bracket 33a provided on the upper rear side of the tray 1.
The cassette receiver 32 is supported so as to be vertically movable. Here, the amount of movement of the cassette receiver 32 is such that the cassette 20 in which the smallest size film to the largest size film is inserted can be held by being sandwiched between the cassette 20 and the upper side engaging portion 30 by the pressure contact force of the spring 33. It is set according to the stroke range.

Further, the lower locking portion 31 by the above-mentioned stepped supporting step portion
Has a support step portion 34a, 34b for locking and holding the cassette 20 loaded with the narrowest film at the center in the width direction, and the cassette 20 loaded with the film which gradually expands in width toward the outside. Supporting steps 35a, 35b; 38a, 3
It is a symmetrical shape formed by forming 8b in a staircase,
The structure is such that the misalignment of the cassette 20 in the left-right direction can be locked at each step portion.

Further, in this embodiment, a grooved type having a groove portion on the peripheral portion is used as the cassette 20, and the groove portion 20 on the upper end side is used.
a is an elastic locking protrusion 30a formed in the upper locking portion 30 on the tray 21 side so as to have a chevron shape with rubber or the like.
In addition, the groove portion 20b on the lower end side is provided with the stepped support step portions 34a, 34b;
...; 38a and 38b are configured to be hooked and locked to elastic locking projections 41 formed in a mountain shape by rubber or the like, and the cassette 20 is detached from the tray 21 by these engaging structures. I try not to. However, the present invention is not limited to this, and the cassette 20 is provided with each of the support step portions 34a that form the upper locking portion 30 of the tray 21 and the lower locking portion 31 of the cassette receiving body 32.
34b; ..., 38a, 38b, as long as they have an engaging structure capable of being sandwiched and locked and held, various modified examples are conceivable.

With such a configuration, as shown in FIG. 2, the cassette 20 to be mounted is pulled to the corresponding support step portions 35a, 35b of the cassette receiver 32 which is biased upward on the front side of the tray 21. By hooking and locking, the receiving body 32 is once pushed down against the biasing force of the spring 33, and the upper end side is hooked and locked by the upper locking part 30 of the tray 21 by an extremely simple mounting work. This cassette can be attached, and this cassette
As shown in FIG. 1 and FIG. 3, the reference numeral 20 indicates a member that can be easily and surely mounted and held by being vertically sandwiched by the biasing force of the spring 33 acting on the receiving body 32. Yes, its practical effect will be clear. That is,
In such a configuration, the trays 21 of the plurality of types of cassettes 20 are
Since it is easily sandwiched between the upper locking portion 30 of the tray 21 and the cassette receiver 32 that is vertically movable downward, the number of constituent parts is minimized compared to the conventional case. Well, it is possible to stabilize the quality such as processing accuracy and assembly accuracy of each part, and cassettes with different film sizes.
Even when wearing the 20, you do not need any extra operation,
It can be done by simple mounting work, and it does not require the lock operation as in the past, and is excellent in terms of operability.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part can be appropriately modified or changed. For example, in the embodiment described above, the grid frame 13
Although the cassette holder 10 having a structure in which the super high grid density grid 12 is held is illustrated in the above, the present invention is not limited to this, and in the cassette holder 10 having a conventionally known configuration, the cassette holder 21 is It will be easily understood that the effect can be obtained by applying it to the mounting portion of the X-ray film cassette 20. Further, the shape and the number of the step-like support step portions forming the cassette receiving portion 31 of the cassette receiving body 32 described above may be appropriately set according to the type and size of the cassette 20 to be used. Further, it goes without saying that the mounting direction of the cassette 20 is not limited to the vertical direction and may be the horizontal direction.

[Effect of device]

As described above, according to the film cassette holder for X-ray photography according to the present invention, a cassette tray that can be inserted into and removed from the insertion space between the grid frame and the fixed side frame on the back side thereof, and a plurality of types of cassette trays. It is equipped with a film cassette that is detachably mounted on the front side of the tray with each film loaded, and the upper locking part that hooks and locks the upper end side of this cassette The cassette receiving body, which has a lower locking portion that is provided on the lower portion and hooks and locks the lower end side of the cassette so as to face the lower portion, is supported movably up and down under the tray with a constant upward biasing force. In addition, the lower locking portion of the cassette receiving body supports at least both sides in the width direction on the lower end side of a plurality of types of cassettes formed for each film size. Despite the simple structure, the cassette to be mounted on the tray is extremely simple between the cassette receiving body that is biased upward and the upper locking portion of the tray. It can be properly mounted by positioning it in the center of the tray by hooking and locking it in the mounting work, and sandwiching this cassette from above and below by the upward pressure contact force of the spring acting on the receiving body. It can be securely mounted and held, and its practical advantages are great. In particular, according to the present invention, when mounting the cassette, the minimum number of components required is sufficient, and the shape of each part is simple, and the workability, assemblability, and cost are excellent.

[Brief description of drawings]

FIG. 1 is a schematic front view of a cassette tray showing an embodiment of a film cassette holder for X-ray photography according to the present invention, and FIG.
FIG. 3 is a schematic sectional view thereof, FIG. 3 is a schematic view for explaining a cassette receiving portion on a cassette tray which characterizes the present invention, and FIGS. 4 and 5 show an entire cassette holder to which the present invention is applied. It is a schematic front view and its longitudinal side view. 10 …… X-ray film cassette holder, 11 …… Fixed side frame, 12 …… Grid, 13 …… Grid frame, 15,15 …… Slide rail, 20 …… Film cassette, 20a, 20b …… Groove, 21 …… Cassette tray, 22 ……
Cassette receiving part, 23, 23 …… Slide rail, 24 …… Handle, 30 …… Upper locking part, 30a …… Elastic locking protrusion, 31 ……
Lower locking part, 32 ... Cassette receiving body, 33 ... Tension spring, 34a, 34b; 35a, 35b; ...; 38a, 38b ... Support step part, 39
...... Guide vertical groove, 40 ...... Spring holder, 40a ...... Key member, 41 ...... Elastic locking projection.

Claims (1)

[Scope of utility model registration request] 1. A cassette tray, which is provided so as to be insertable and removable along a surface direction in a inserting space between a grid frame having an X-ray imaging grid and a fixed side frame provided in parallel on the back side thereof, and a plurality of types. The X-ray imaging film cassettes, which are detachably mounted on the front side of the cassette tray with the respective X-ray imaging films loaded, are prepared for each film size, and the upper end side of the cassette is pulled. The cassette receiving body is provided with an upper locking portion for hooking and locking, and a lower locking portion for hooking and locking the lower end side of the cassette facing the upper end of the cassette tray. The tray is supported vertically so that it can be moved up and down with a biasing force always applied upward, and the lower part of the cassette receiver is formed in multiple types depending on the film size. X-ray film cassette holder, characterized in that formed at least Te by the width direction on both sides to the supporting stepped portion for supporting the stepped with the cassette on the lower end side.