JPH0670707B2 - Film detection mechanism for film cassette - Google Patents

Description

The present invention relates to a film detecting mechanism for a film cassette that detects the presence or absence of a film contained in the cassette.

[Prior Art] An X-ray film cassette containing a photographed X-ray film is sent to a film loading / unloading device, and the cassette lid is opened in a state where external light is blocked, and the X-ray film cassette is opened. Are taken out. When the X-ray film is taken out, a suction member such as a negative pressure suction cup sucks the X-ray film, takes it out, and sends it to the developing device.

When the X-ray film is sucked by the suction member, the presence or absence of the X-ray film in the cassette is detected. Infrared light is used to detect the presence or absence of this X-ray film, and the difference between the reflectance of infrared light applied to the X-ray film surface and the reflectance of infrared light applied to the inner bottom surface of the film cassette. And an optical method for detecting the displacement that the suction cup moves to adsorb the X-ray film. However, in the optical method, the difference between the reflectance of the X-ray film surface and the reflectance of the inner bottom surface of the cassette may be small in some cases, and in this case, it is difficult to read the difference, which may result in erroneous detection. In addition, when the displacement amount of the suction cup is read, the displacement amount of the suction cup is extremely small, and it is difficult to read this displacement amount, so that it may be erroneously detected.

Therefore, the applicant of the present application has proposed a film detection mechanism capable of surely detecting the presence or absence of an X-ray film in the cassette in Japanese Patent Application No. 62-055503. According to this, after the X-ray film is adsorbed by the first adsorbing means whose adsorption surface is arranged in parallel to the surface of the X-ray film, the adsorption surface has a predetermined angle with respect to the surface of the X-ray film. The second suction means, which is inclined and arranged to suck the X-ray film,
The presence or absence of the X-ray film is detected by detecting whether or not the suction means is in a negative pressure state by the negative pressure detection means.

[Problems to be Solved by the Invention] However, in the above-mentioned Japanese Patent Application No. 62-055503, the accuracy is improved when the second suction means is arranged and assembled at a predetermined angle with respect to the surface of the X-ray film. I need. For example, when the inclination angle of the second suction means is too large than the predetermined angle, the second suction means cannot suck the film because the second suction means cannot suck the film even though the film is suctioned by the first suction means. There is a possibility that it will be detected as a stateless state of the film instead of the state.

If the tilt angle is too small, the first suction means suctions the inner bottom surface of the cassette and then the second inner bottom surface of the cassette.
Since the suction means also sucks the negative pressure, the X-ray film is not stored in the cassette, but the X-ray film is not stored in the cassette.
There is a possibility that the line film will be detected as being present.

In view of the above facts, the present invention has an object to obtain a film cassette film detecting mechanism capable of more surely detecting the presence or absence of a film in a cassette.

[Means for Solving the Problems] In order to solve the above problems, the present invention is a detection mechanism for detecting the presence or absence of a film in a cassette, and a suction means for sucking the film in the cassette, It is characterized in that it has drive means for inclining the suction surface of the suction means with respect to the inner bottom surface of the cassette, and detection means for detecting the inclination of the suction surface by the driving means.

[Operation] According to the present invention, when no film is accommodated in the cassette, the adsorption means adsorbs the inner bottom surface of the cassette or the screen attached to the inner bottom surface of the cassette. From this state, the suction means is driven by the drive means such that the suction surface is inclined with respect to the bottom surface of the cassette, but since the suction means sucks the bottom surface of the cassette or the screen attached to the bottom surface of the cassette. The suction surface does not tilt with respect to the inner bottom surface of the cassette.

Therefore, the detection means does not detect the inclination of the suction surface,
As a result, it is determined that the film is not accommodated in the cassette.

When the film is accommodated in the cassette, the adsorption means adsorbs the film in the cassette. From this state, the suction means is driven by the driving means such that the suction surface is inclined with respect to the inner bottom surface of the cassette. By this driving, the suction surface of the suction means is inclined with respect to the inner bottom surface of the cassette while sucking the film.

Therefore, the detection means detects the suction state of the suction surface, and it is judged from this that the film is accommodated in the cassette.

[Embodiment of the Invention] FIG. 4 and FIG. 5 show an X-ray film take-out device 12 using a film detecting mechanism 10 for a film cassette according to the present invention. FIG. 4 is a side view of the X-ray film take-out device, and FIG. 5 is a sectional view taken along line VV of FIG.

As shown in FIGS. 4 and 5, the X-ray film take-out device 12 is provided with a pair of side plates 18 standing upright from a base (not shown). A shaft 20 is arranged at an intermediate portion in the height direction of the pair of side plates 18, and is suspended between the pair of side plates 18 to rotatably support the intermediate portion. Both ends of the shaft 20 are projected and extended outward between the pair of side plates 18, respectively.

One end of each arm 22 is fixed to the tip of the shaft 20 that is projected and extended outward between the pair of side plates 18. The other end of the arm 22 pivotally supports the bent side plates 26A and 26B of the moving plate 26 via a pin 24.
The moving plate 26 is arranged with its longitudinal direction aligned with the axial direction of the shaft 20.

One end of a support arm 30 is pivotally supported on one side plate 26A of the moving plate 26 via a pin 28. This support arm 30
The other end is pivotally supported via a pin 34 on a frame 32 standing on a base (not shown). Shaft 20 and pin 24
The axial distance between and is equal to the axial distance between pins 28 and 34,
The axial distance between the shaft 20 and the pin 34 is set equal to the axial distance between the pin 24 and the pin 28. Therefore support arm 3
0, the arm 22 and the side plate 26A constitute a parallel link mechanism.

Below the moving plate 26, a suction cup mounting plate 36 is arranged between the side plates 26A and 26B. The suction cup mounting plate 36 is arranged with its longitudinal direction aligned with the axial direction of the shaft 20, and both end portions are bent to provide side plates 36A, 36B. The side plates 36A, 36B are pivotally supported by the side plates 26A, 26B of the moving plate 26 via a pair of pins 38.

Further, a plurality of suction cups 40 are fixed to the suction cup mounting plate 36 with their suction surfaces facing downward.

These suction cups 40 are designed to be inserted into the cassette 14 whose lid (not shown) is opened as shown in FIG. An X-ray film 16 is accommodated in the cassette 14, and after the suction cup 40 adsorbs the X-ray film 16, the suction cup 40 is moved in the direction of arrow A in FIG. 16 is a mechanism to be taken out. X-ray film 16 taken out from cassette 14
Is sandwiched between a pair of rollers 50 spanned between a pair of side plates 18 and sent to a developing unit (not shown).

FIG. 6 shows the film cassette film detecting mechanism 10 provided in the X-ray film take-out apparatus.

As shown in FIG. 6, the side plate 36A of the suction plate mounting plate 36
An L-shaped plate 42 is fixed to the upper part of the side.
One piece of this plate 42 is erected from the suction cup mounting plate 36.

Side plate 36A of suction plate mounting plate 36 and side plate 26A of moving plate
A rotary lever 44 having an intermediate portion pivotally supported by the pin 38 is disposed between the and.

Further, a tension coil spring 48 is arranged along the side plate 36A, one end of which is locked to the rotary lever 44 and the other end of which is wound around a pin 37 which is erected from the side plate 36A.

Further, a contact block 46 for contact is attached to the rotary lever 44 by a bolt 47.
It is installed in. The contact block 46 is made of synthetic resin (for example, polyacetal resin).

The plate 42, the rotary lever 44, the contact block 46, and the tension coil spring 48 are simultaneously moved when the suction cup 40 is moved in the direction of arrow A in FIG. 4 by the parallel link mechanism. In this case, the rotation lever 44 is prevented from rotating in the counterclockwise direction about the pin 38 by a stopper (not shown), and can be moved in the direction of arrow A while maintaining the posture shown in FIG. ing. The sucker mounting plate 36 also tries to rotate counterclockwise about the pin 38 by its own weight, but since it is connected to the rotary lever 44 via the tension coil spring 48, this rotation is blocked and the rotation of the suction plate is stopped as shown in FIG. Arrow A with the posture shown
It is designed to be moved in the direction.

An eccentric cam 64 is arranged below the contact block 46. The outer peripheral surface of the eccentric cam 64 contacts the contact block 46 provided on the rotary lever 44 in the state shown in FIG. Also, the eccentric cam 64 is a drive shaft 66 of the motor 66.
It is stuck to A. The motor 66 is fixed to a bracket 68 which is erected from a base (not shown).

When the eccentric cam 64 is rotated by the driving force of the motor 66, the contact block 46 slides on the outer peripheral surface of the eccentric cam 64, and the rotation lever
44 is rotated clockwise about the pin 38. When the contact block 46 is in contact with the outer peripheral surface where the distance between the shaft center of the eccentric cam 64 and the outer peripheral surface is the shortest, the rotary lever
Reference numeral 44 is the state shown in FIG. 4, and in this state, the suction surface of the suction cup 40 is parallel to the surface of the X-ray film 16 as shown in FIG.

Further, from this state, the eccentric cam 64 is rotated by the driving force of the motor 66, and the contact block 46 slides on the outer peripheral surface of the eccentric cam 64 to rotate the rotary lever 44 around the pin 38 in the clockwise direction in FIG. It is like this.

Also, a limit switch 70 is provided in front of the suction cup mounting plate 36.
Are arranged. The limit switch 70 is fixed to a mounting bracket 72. The mounting bracket 72 is fixed to the frame 74. The frame 74 is fixed on a base (not shown) via a frame (not shown).

The mounting bracket 72 has a contact 70A for the limit switch 70.
A lever 76 is provided corresponding to. An intermediate portion of the lever 76 is pivotally supported by the mounting bracket 72 via a pin 78. The lever 76 is provided with a bolt 80 having a head protruding toward the plate 42 provided on the upper surface of the suction cup mounting plate 36. The bolt 80 is screwed into a screw hole provided in the lever 76, and the amount of protrusion of the head from the lever 76 can be adjusted.

A bolt 82 is also provided below the bolt 80. The head of the bolt 82 is projected toward the plate 42, and the tip end opposite to the head penetrates the lever 76 and contacts the contact 70A of the limit switch 70. Like the bolt 82, this bolt 80 is also screwed into a screw hole provided in the lever 76, and the amount of protrusion of the head from the lever 76 can be adjusted.

Therefore, when the suction cup mounting plate 36 rotates clockwise about the pin 38 in FIG. 4, the plate 42 contacts the head of the bolt 80, and the lever 76 swings counterclockwise in FIG. 4 about the pin 78. The state shown in Fig. 1 is obtained. As a result, the tip of the bolt 82 presses the contact 70A of the limit switch 70.

Next, the operation of this embodiment will be described.

When the X-ray film 16 is not accommodated in the cassette 14, the suction cup 40 adsorbs the inner bottom surface of the cassette 14. From this state, the eccentric cam 64 is rotated by the driving force of the motor 66. By this rotation, the rotary lever 44 is rotated around the pin 38 in the clockwise direction in FIG. At this time, the tension coil spring 48 urges the suction cup mounting plate 36 to rotate in the same direction. However, as shown in FIG. 2, since the suction cup 40 attracts the inner bottom surface of the cassette 14, the suction cup mounting plate 36 Cannot rotate about pin 38. Therefore, the plate 42 does not come into contact with the head of the bolt 80, so that the limit switch 70 cannot be operated. As a result, it is detected that the X-ray film is not contained in the cassette 14.

When the X-ray film 16 is accommodated in the cassette 14, the suction cup 40 adsorbs the X-ray film 16 in the cassette.
From this state, the eccentric cam 64 is rotated by the driving force of the motor 66. By this rotation, the rotary lever 44 is rotated around the pin 38 in the clockwise direction in FIG. The rotation of the rotary lever 44 causes the suction cup mounting plate 36 to rotate in the clockwise direction in FIG. At this time, the suction cup 40 is tilted from the bottom of the cassette 14 because the end of the X-ray film 16 is turned over from the bottom of the cassette 14, and the suction plate is attached.
36 is rotated by the biasing force of the tension coil spring 48. As a result, as shown in FIG. 1, the plate 42 on the suction plate mounting plate 36 abuts on the head of the bolt 80 to swing the lever 76 about the pin 78. When the lever 76 swings around the pin 78, the tip of the bolt 82 contacts the limit switch 70.
Press 70A to activate limit switch 70. As a result, it is detected that the X-ray film 16 is accommodated in the cassette 14.

[Effects of the Invention] As described above, the film cassette film detection mechanism according to the present invention is a detection mechanism for detecting the presence or absence of a film in the cassette, and a suction means for adsorbing the film in the cassette. Since it has a driving means for inclining the suction surface of the suction means with respect to the inner bottom surface of the cassette and a detection means for detecting the inclination of the suction surface by the driving means, the presence or absence of a film in the cassette can be more surely confirmed. The excellent effect that it can be detected is obtained.

[Brief description of drawings]

1 to 3 show the operation of the film detecting mechanism for the film cassette, and a sectional equivalent view showing a part cut along the line I-I in FIG. 5, and FIG. 4 are film cassettes according to the present invention. FIG. 5 is a side view showing an embodiment of an X-ray film take-out device to which a film detecting mechanism for a film is applied, FIG. 5 is a sectional view taken along line VV in FIG. 4, and FIG. 6 is a film for film cassette. It is an exploded perspective view showing a detection mechanism. 10 …… Film cassette film detection mechanism, 14 …… cassette, 16 …… X-ray film, 36 …… sucker mounting plate, 40 …… sucker, 44 …… rotating lever, 48 …… tensile coil spring, 64… … Eccentric cam, 70 …… Limit switch, 76 …… Lever, 80 …… Bolt, 82 …… Bolt.

Claims (1)

[Claims] 1. A detection mechanism for detecting the presence or absence of a film in a cassette, a suction means for sucking the film in the cassette, and a drive for inclining a suction surface of the suction means with respect to the bottom surface of the cassette. A film detecting mechanism for a film cassette, comprising: a means and a detecting means for detecting the inclination of the suction surface by the driving means.