JPH0443870Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a snapshot device for an X-ray imaging device, and in particular, it is capable of selectively using film cassettes of different sizes (hereinafter referred to as cassettes),
The present invention also relates to a quick-shooting apparatus which can select between full film photography and divided photography, and which can perform X-ray photography at various photographic sizes depending on the combination of these selections.

Conventionally, in this type of quick-shooting device, the shooting size can be set by selecting the shooting size selection switch (linked to the operation switch of the automatic aperture device, etc.) or by attaching and removing an optional split mask, etc., to set the shooting size and take quick shots. was doing. However, according to this method, the size of the cassette actually attached and the mounting position of the cassette (including the vertical, horizontal, etc., mounting direction) are determined by selecting and operating the switch on the device in advance and attaching and detaching the split mask to set the imaging size. (same as in this specification) does not comply,
You can take snapshots. For this reason, if the cassette is attached incorrectly, a photograph of the desired size cannot be obtained and re-photographing becomes necessary, resulting in wasted film and unnecessary X-ray irradiation.

The purpose of the present invention is to eliminate the drawbacks of the prior art described above, and to provide a system in which the imaging size set by selecting the switch on the device and attaching and detaching the split mask matches the cassette size selection and mounting position selection when the cassette is attached. can only be photographed, otherwise
It is an object of the present invention to provide a snapshot device which interlocks a radiation control device and prevents wasteful use of film and unnecessary X-ray irradiation.

The feature of this invention is that it detects the size and position of the cassette actually attached to the snapshot device, and when it does not match the shooting size set by selecting the switch on the device and attaching and detaching the split mask, The reason is that the X-ray control device is configured to be interlocked to disable X-ray irradiation.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are perspective views from the front side of the snapshot device, and inside the snapshot device housing 1 there is a cassette holder middle frame (hereinafter simply referred to as holder middle frame) 3 into which the cassette 2 is attached. and,
A cassette holder inner frame (hereinafter simply referred to as holder inner frame) 4 is housed, which is attached to the cassette holder inner frame 3 so as to be slidable in the vertical direction using the holder inner frame 3 as a guide. Here, the holder inner frame 4 is constantly pressed upward by a spring (not shown), and when the cassette 2 is not attached, the holder inner frame 4 is pressed against the holder inner frame 4.
It will be in a state where it is pushed up to the upper end surface. Therefore, when attaching the cassette 2 to the holder inner frame 4, the amount of movement varies depending on the size of the cassette 2 or the attachment position (direction), but the holder inner frame 4 is pushed downward and attached. I will do it. Although not shown, FIG. 2 shows the position of the holder inner frame 4 with the cassette 2 attached (the same applies to FIG. 3 below).

The slide piece 5,
6 and a moving handle 7 are fixed, and by grasping the handle 7 and sliding the holder middle frame 3 to the left (position A) in the drawing, it slides using the rail fixed inside the housing 1 as a guide. The pieces 5 and 6 slide, and the holder middle frame 3 moves to the left in the paper. In the figure, holder middle frame 3
is located to the right of the housing 1 (position B), but this position is generally referred to as the cassette 2 being in the see-through position, and the cassette 2 is moved to the left in the paper after leaving the see-through position. This is called moving to the shooting position.

Conventionally known methods for attaching the cassette of a cassette-type snapshot device include a method of attaching the cassette from the right side of the housing 1 and a method of attaching the cassette from the left front side of the housing 1. In this embodiment, the cassette is attached using the former method. A structure employing this is shown. That is, the cassette 2 is attached to the holder inner frame 4 when the holder inner frame 3 is in the perspective position B. The cassette 2 in FIG. 1 is a cassette for six-cut film, and is shown in a state in which it is mounted horizontally into four sections. X-ray imaging using cassettes of other sizes will be described later.

When the holder middle frame 3 is in the perspective position B, the slide piece 5 turns on the micro switch 8 for detecting the cassette perspective position (contact a is closed, contact b is open). When the holder middle frame 3 leaves the perspective position B and moves to the photographing position A, the micro switch 8 turns off (contact a opens, contact b closes), and the off signal causes the several pieces housed in the split positioning mechanism 9 to be turned off. Among the solenoids, the one suitable for the photographing size selected by the operator by the photographing size selection switch 10 is operated, and the stopper 11 is projected. As a result, the block 12 fixed to the holder middle frame 3 collides with the protruding stopper 11, and the movement of the holder middle frame 3 is stopped. When the block 12 collides with the stopper 11, the shaft 13 fixed to the positioning mechanism 9 turns on the micro switch 14 for detecting the shooting position of the cassette (contact a closes).
The on-signal activates an X-ray control device, which will be described later, to irradiate X-rays and perform imaging.

Here, the beam center of the imaging X-ray tube (not shown) is always fixed and directed toward a fixed point of the snapshot device (the center of the imaging position A). For this reason, the operator must select and operate the switch on the device to change the mounting position of the cassette according to the set imaging size, and if the operator makes a mistake, the desired imaging size may not be obtained. This has been a problem for a long time. Therefore, in the embodiment of the present invention, as will be described in detail later, a cassette size and cassette mounting position detection mechanism is provided, and the imaging size selected by the operator using the selection switch 10,
The configuration is such that X-ray imaging can be performed only when the size and mounting position of the corresponding mounting cassette match, and furthermore, in the case of segmented radiography, when a predetermined segmented mask is also set (mounted).

Figure 3 is a diagram showing the cassette retraction part of the snapshot device housing.
The same parts as in FIG. 2 are given the same reference numerals.

In addition, in Fig. 3, 16 is a cassette holder, 1
Reference numeral 7 denotes a micro switch for detecting the size and mounting position of the cassette 2 (including the mounting direction, such as vertically and horizontally, as described above). 18 is a dog pressed by the cassette 2 to operate the micro switch 17. In this case, the micro switch 17 is turned on (contact a is closed) when the cassette 2 is mounted horizontally in six-cut format (full surface, divided into two and divided into four) or vertically in four-cut format (full surface and divided into two).

Reference numeral 19 denotes a magnet that is attached to the holder inner frame 4 and slides vertically according to the vertical movement of the holder inner frame 4, that is, according to changes in the size and mounting position of the cassette 2, and is turned on when it approaches. The contacts 20 to 23 constitute a magnetic switch MS. This magnetic switch MS is
Here, the contact 23 is closed when the six-slice cassette 2 is installed horizontally into four parts, and the contact 22 is closed when the six-slice cassette 2 is installed vertically.

Note that the switches 8, 14, 17, and MS (contacts 20 to 23) constitute a part of an interlock circuit to be described later.

FIG. 4 is a diagram showing the state in which the mask is attached to the cassette 2 used during divided photographing, as viewed from the back side of the snapshot device housing 1. In the figure, 24 is a mask divided into 4 parts, and the actual size of the image is the opening 2.
This corresponds to 5. Opening 26 shown in broken lines
is the opening of the two-part mask.

In FIG. 4, when the four-part mask 24 is retracted to the left in the paper, the pin 29 is pushed by the protrusion 27, which turns on the micro switch 28 (closes the A contact and opens the B contact), and the mask 24 moves to the retracted position. is detected.

Further, in the two-divided mask state, the microswitch 30 is pushed through the pin 31 to turn on (a contact closed), and the two-divided mask retracted state is detected.

These microswitches 28 and 30 also constitute a part of an interlock circuit which will be described later.

FIGS. 5a to 5c are diagrams showing examples of different sizes and mounting positions of the cassette 2. this house,
In the example shown by the solid line in Fig. 5a, the holder inner frame 4 is
An example is shown in which the six-slice cassette 32 is installed horizontally into four parts (six-slices horizontally divided into four parts). In this case, the holder inner frame 4 is in a lowered state, and the holder inner frame 4 (the cassette 3
2) is held by a claw (not shown) to prevent it from moving upward due to the force of the spring.
A magnet 19 attached to the holder inner frame 4 faces the contact 23 to turn it on. Further, the cassette 32 pushes the dog 18 downward to turn the micro switch 17 on (a contact closed).

In this state, six-cut horizontal four-division photography is started.
In addition, in the case of this six-section horizontal quadrant imaging, after two imagings are completed, the claws touch the holder inner frame 4 or the cassette 32 on the way back from the imaging position to the fluoroscopy position.
The cassette 32 moves upward together with the holder inner frame 4, and is ready for the third and fourth imaging. Therefore, at this time, both the microswitch 17 and the contact 23 are in the OFF state.

In Figure 5, the example indicated by the broken line is the same six-cut cassette 3.
2 is attached in the same horizontal direction, divided into two parts or the entire surface (six-cut horizontal two-split shooting state or six-cut horizontal full-screen shooting state). In this case, dog 1
8 and magnet 19 have been moved upward from the illustrated position.

Further, FIG. 5b shows an example in which the four-slice cassette 33 is attached to cover the entire vertical surface (four-slice vertical entire surface photographing state). In this case, the holder inner frame 4 is pushed down to the lowest position. Therefore, the magnet 19 is also located at the lowest position, and the contacts 20 to 23 are all turned off. On the other hand, the fifth
As in the case where the cassette 32 is attached as shown by the solid line in Figure a, the microswitch 17 is in the on state.

Further, FIG. 5c shows an example in which the six-slice cassette 32 is attached to the entire vertical surface (six-slice vertically entire surface photographed state). In this case, the holder inner frame 4 is pushed up a little, but its upper limit is determined by the cassette holder 16, and it is at the illustrated position. In this position, the microswitch 17 is off and the contact 22 is on.

Next, the actually used cassettes 2, 32, 33
FIG. 6 shows an interlock circuit that interlocks the X-ray control device and disables X-ray irradiation when the size and mounting position of the mask do not match the selection of the imaging size selection switch 10 and the division mask attachment/detachment state. Explain with reference to.

In Figure 6, the six-cut horizontal quadrant (5th
This will be explained by taking as examples the case of 4-section vertical full-screen photography (see Fig. 5b).

In FIG. 6, the same reference numerals as in FIGS. 1 to 5 indicate the same or corresponding parts. The suffixes a and b in FIG. 6 represent the a and b contacts of each switch. In each switch, when only an a contact is provided, the suffix a is omitted and the same reference numerals as in FIGS. 1 to 5 are used.

Additionally, in FIG. 6, 1PS is a preset switch, which closes when the cassettes 2, 32, and 33 are attached, and maintains the closed state until the final shooting is completed.

1D to 5D are relay coils, 1D _-1a , 2
D _-1a , 2D _-2a , 2D _-1b , 3D _-1a , 3D _-2a , 4
D _-1a , 4D _-2a , 5D _-1a , 5D _-2b , and 5D _-3a are those contacts (relay contacts). 35 is a lamp that indicates that preparation for X-ray irradiation is complete; 36 is an X-ray control device that drives an X-ray tube (not shown) to irradiate X-rays _; When _2a is closed, it becomes ready for X-ray irradiation.

Further, numeral 37 is a six-cut horizontal four-division photographing selection switch in the photographing size selection switch 10 shown in FIG. 39 is a contact a of a relay coil (not shown) which is energized for a short time when each X-ray imaging session except the last one is completed, and each time it closes, the relay coil 5D is held. This A contact 39 (relay coil equipped with this) is 0 when shooting the entire surface.
The above-mentioned short-time operations are performed three times in the case of 4-split shooting, and the shooting size selection switch 10 (six-cut horizontal 4-split shooting selection switch 37), which is turned on (six-cut horizontal 4-split shooting selection switch 37), Selection button switch 3
8, etc.).

In addition, D ₁ and D ₂ are diodes, R ₁ and R ₂ are resistors,
C ₁ and C ₂ are capacitors.

Here, the a contact 8a of the micro switch 8 for detecting the cassette fluoroscopic position is closed (the b contact 8b is open) when the cassettes 32 and 33 are in the fluoroscopic position, and the a contact 1 of the micro switch 8 for detecting the cassette imaging position is closed (the b contact 8b is open)
7 is closed when the cassettes 32 and 33 are in the photographing position.

Further, the micro switches 28 and 30 for mounting and retracting the 4-split mask and the 2-split mask are connected to their a contacts 28a and 30, respectively, when detecting the mask retracted state.
closes (b contact 28b opens).

Furthermore, the micro switch (contact a) 17 for detecting the cassette size and mounting position is used to adjust the cassette size to the six-cut horizontal four-part shooting state (see Figure 5 a) and the four-cut vertical full-screen shooting state (see Figure 5 b). , closes when the mounting position is selected. The contact 23 of the magnetic switch MS is closed when the cassette size and mounting position are selected for six-section horizontal four-section imaging, and the contacts 20 to 23 are closed when the cassette size and mounting position are selected for four-slice horizontal full-screen imaging. All are open when selected. That is, by closing the micro switch 17 and the contact 23, the actual cassette size and mounting position selection can be changed to
It is detected that the camera is in a divided shooting state. In addition, when the micro switch 17 is closed and the contacts 20 to
23 is fully opened, it is detected that the actual cassette size and mounting position selection are in the four-slice vertical full-scale photographing state.

Next, the circuit operation will be explained. First, when the cassettes 2, 32, and 33 are installed, the preset switch 1PS is closed and the relay coil 1D is energized. When the cassettes 2, 32, and 33 are in the transparent position B, the a contact 8a of the micro switch 8
is closed, and b contact 8b is in an open state. In this state, when the six-cut cassette 32 is installed horizontally into four parts, the micro switch (A contact) 17 and the contact 23 of the magnetic switch 1MS are closed, and the relay coil 2D
is excited, and it is detected that a cassette with a six-slice format horizontally divided into four parts is attached (six-slice horizontally divided four-split imaging state).
When relay coil 2D is energized, relay contact 2
D _-1a and 2D _-2a close.

On the other hand, the contact 2D _-1b of the relay coil 2D is opened, and an interlock is established to prevent the relay coil 3D from being excited due to this opening.

Next, when the 4-part mask 24 is attached, the a contact 28a of the micro switch 28 opens and the b contact 28a opens.
8b closes. Subsequently, when the six-cut horizontal quadrant shooting selection button 37 is pressed and closed, the b contact 28b of the micro switch 28 and the relay contact 2 are pressed.
D _-2a , relay coil 4D via switch 37
is energized and excited. With this, the setting conditions for the six-cut horizontal 4-division are complete, and the contact point 4
The lamp 35 lights up when D _-1a is closed, indicating that preparation for X-ray irradiation is complete. at the same time,
Relay contact 4D _-2a is also closed and X-ray irradiation (photography)
Prepare for the directive.

When an X-ray irradiation (imaging) command is issued and the cassette 32 begins to move from the fluoroscopy position B to the imaging position A, first, the a contact 8a of the micro switch 8 opens and the b contact 8b closes. Here, while the A contact 8a and B contact 8b of the micro switch 8 are both switched to opposite states, the circuit is momentarily disconnected, but the capacitor
Due to the discharge of _C1 , the excitation of the relay coil 2D is maintained. Thereafter, the relay coil 2D maintains the excited state through the path of the contact 5D _-2b , the b contact 8b of the micro switch 8, the diode D ₁ and the contact 2D _-1a . After that, contact 23 of the magnetic switch MS
Both the micro switch 17 and the micro switch 17 remain open. When the cassette 32 reaches the photographing position A,
The micro switch 14 closes and the X-ray control device 36
An X-ray ON signal is sent to the camera, and the first X-ray photograph is taken.

At the same time as the first X-ray imaging is completed, contact 39 closes for a short time, energizes relay coil 5D, and closes contact 5.
Self-maintaining due to D _-1a . At this time, contact 5D _-2b
opens and contact 5D _-3a closes. Thereafter, the cassette 32 is returned to the fluoroscopy position B in preparation for the second imaging. At this time, contact 8b opens, but since contact 5D _-3a of relay coil 2D is closed, its excitation continues to be maintained. In the case of four-part radiography, this state is maintained until the fourth X-ray radiography is completed.

Then, when the series of shots is completed for the second, third, and fourth time, the preset switch 1PS opens.
The relay coil 1D is de-energized and its a contact 1
By opening D _-1a , all the circuits for the X-ray irradiation command are turned off, making it impossible to output the X-ray ON signal to the X-ray control device 36, and the lamp 35 is also turned off, causing the next X-ray irradiation. (shooting) is not possible.

Further, as shown in FIG. 5b, when the four-slice cassette 33 is mounted in the state of photographing the entire vertical surface, the micro switch 17 is closed and the relay coil 3D is energized. This means that the vertical full-screen shooting state) has been detected. At this time, relay contacts 3D _-1a and 3D _-2a close. And 2
The split mask and 4-split mask are also saved, so
A contacts 28a, 3 of micro switches 28, 30
0 closes.

Next, when the photographing selection button 38 for four-slice vertical full-scale photographing is pressed and closed, the a contacts 28a, 30 and the contact 3 of the micro switches 28, 30 are activated.
D _-2a , relay coil 4D in the path of switch 38
is energized, and the setting conditions for four-slice vertical full-scale imaging have been completed, and by closing the relay contact 4D _-1a , the lamp 35 lights up, indicating that preparation for X-ray irradiation is complete. Thereafter, the operation is the same as in the case of the above-mentioned six-cut horizontal four-division photographing. However, since it is a full-plane radiography, the radiography ends after one X-ray radiography, and the preset switch 1PS is opened, making it impossible to perform the next radiography.

According to the circuit configuration described above, the size and mounting position of the cassette actually installed, the type of imaging size selection switch operated and the selection of the division mask,
If the attachment/detachment state (selected imaging size) does not match, preparation for X-ray irradiation will not be completed, and since an interlock is established to prevent X-ray irradiation, imaging errors can be prevented in advance. Therefore, wasteful use of film and unnecessary X-ray irradiation can be avoided.

In addition, for various types of imaging such as imaging of other cassette sizes, whole surface, and divided imaging, the X-ray control device can be interlocked using a similar circuit to disable X-ray irradiation unless the above-mentioned agreement exists.

As explained above, according to the present invention, the settings are determined by the type of film cassette actually attached, the direction and position of the attached film cassette (the size and attachment position of the cassette), the selection of the exposure size selection switch, and the attachment and detachment of the split mask. X unless the shooting size matches
Since the line control device is configured so that the interlock is not released, there is no risk of shooting errors caused by incorrect cassette size or mounting position, incorrect operation of the image size selection switch, or incorrect operation of attaching/detaching the split mask, thereby reducing wasted film. This has the effect of preventing unnecessary X-ray irradiation.

[Brief explanation of the drawing]

The attached drawing is a diagram for explaining the present invention, and
Figures 1 and 2 are perspective views from the front of the X-ray scanner, Figure 3 is a partially cutaway front view of the housing for explaining the cassette size and cassette installation position detection mechanism of the X-ray scanner, and Figure 4 is 5A to 5C are front views showing an example of a state in which a cassette is attached, and FIG. 6 is a diagram showing an example of the structure of an interlock circuit. 1...Housing, 2...Cassette, 3...Holder middle frame, 4...Holder inner frame, 5, 6...Slide piece, 7...Handle, 8, 14, 1
7, 28, 30...Micro switch, 9...Divided positioning mechanism, 10...Photography size selection switch, 11...Stopper, 12...Block, 1
3...Shaft, 16...Cassette holder, 18
...Dotsugu, 19...Magnet, 20-23...
...Magnetic switch contact, MS...Magnetic switch, 2
4...Four division mask, 25, 26...Opening, 2
7...Protrusion, 31...Pin, 32, 33...Cassette, 35...Lamp, 36...X-ray control device,
37...Six-cut horizontal 4-split shooting selection button switch, 3
8... Four-cut vertical full-screen shooting selection button switch, 1D~
4D...Relay coil, _R1 , _R2 ...Resistance, _C1 ,
C ₂ ... Capacitor, D ₁ , D ₂ ... Diode.

Claims (1)

[Scope of utility model registration request] It is possible to select and use film cassettes of multiple sizes, and it is also possible to select full-length film imaging or segmented film imaging. In a snapshot device that can be operated by selecting a selection switch and attaching/detaching a split mask, detecting the size and mounting position of the cassette actually mounted within the frame for mounting the cassette;
It is characterized by comprising an interlock means that interlocks the X-ray control device to disable X-ray irradiation when the imaging size set by the selection operation of the imaging size selection switch and the attachment/detachment of the division mask does not match. A quick-shooting device.