JPS6132230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray sheet film receive magazine into which photographed sheet films are sequentially fed, stacked and stored.

First, a high-speed film chainer using a receive magazine will be explained with reference to FIG.

1 is a high-speed film changer main body, 2 is a supply magazine for storing unphotographed film 3, 4 is a film ejection port, 5 is a receive magazine for storing photographed film 7, 6 is a film entrance port,
8 to 13 are rollers for feeding the film; 14;
a, 14b are guide plates for guiding the film, 15
a, 15b are intensifying screens.

The unphotographed films 3 stored in the supply magazine 2 in FIG. 1 are passed one by one through the film outlet 4 and are sandwiched between rollers 8 and 9 by a mechanism (not shown). The rollers 8 to 13 are rotated in the direction of the arrow in FIG. 1 by a mechanism not shown, and the film is sent between the intensifying screens 15a and 15b. The intensifying screens 15a and 15b are brought into close contact with each other with the film sandwiched therebetween by a mechanism not shown, and photography is performed here. When the photographing is completed, the intensifying screens 15a and 15b are opened, the photographed film is held between the rollers 11 and 12, and is stored in the receive magazine 5 through the film entrance 6 by the rotation of the rollers. As shown in FIG. 1, this high-speed film changer takes pictures either with the intensifying screen placed vertically on the floor or with the intensifying screen horizontally placed on the floor.

In addition, when shooting continuously, this high-speed film auto changer can change the shooting interval in several steps from 2 seconds to 1/6 seconds as necessary. The speed also changes in several steps. Now, the case where a receive magazine as shown in FIG. 2 is used will be explained.

In FIG. 2, reference numeral 16 indicates a floor surface of a film storage section in which photographed films are stacked and stored, and reference numerals 17 and 18 indicate film stoppers provided at the rear end and front end of the magazine, respectively.

When the photographed film passes between the rollers 11 and 13 and is stored in the receive magazine, the film is fed at high speed, so that the film hits the film stopper 17 at the rear end of the receive magazine and rebounds. At this time, depending on the surrounding environmental conditions and the properties of the film, the rebounded film may fly out of the receive magazine, or the rebounded film may act as a resistance to the entry of the next film, causing A phenomenon may occur where the rear end does not fit into the receive magazine. In order to prevent these inconveniences, it is conceivable to install a mechanism in the receive magazine to prevent the film from rebounding.

An example of this is shown in FIG.

In Figure 3, 19 is a lever rotatably attached to a shaft 20, 21 is attached to the tip of the lever 19, and rotates freely in the direction of the arrow in the figure, but not in the opposite direction, and the surface is made of rubber, etc. It is a roller made of high-friction material. For example, roller 2
A known one-way clutch is interposed between 1 and the shaft. 22 is a leaf spring for pressing the lever 19 against the floor surface. Further, the distance from the center of the roller 21 to the film stopper 18 is made to be approximately the same as the length of the film. Third
Consider the case where the receive magazine shown in the figure is used in the high-speed film autochanger shown in FIG.

Since the roller 21 freely rotates in the direction of the arrow in the figure, that is, in the direction in which the film enters, when the film is sent by the rollers 11 and 13 and enters the receive magazine from the entry port 6, the leading edge of the film is rotated by the roller 21. Pass under it and proceed to the film stopper 17 position. At this point, the film tries to rebound, but since the roller 21 does not rotate in the opposite direction, this acts as a brake and stops. If the braking force is insufficient and the vehicle continues to bounce,
The pressure of the roller 21 may be adjusted appropriately by strengthening the leaf spring 22. Furthermore, depending on the surrounding environmental conditions or the properties of the film, when the film enters the receive magazine, there may be strong resistance between the film and the floor of the receive magazine or with the film already stored in the receive magazine. 1
If the rollers 11 and 13 are placed in such a position that the rear end of the film separated from the film stopper 3 falls into the receive magazine, the distance between the center of the roller 21 and the film stopper 18 will be equal to the length of the film, as described above. Since they are kept at the same level, the film that enters the receive magazine will definitely bite into the roller 21.

In this way, once the film stored in the receive magazine is prevented from moving within the receive magazine, when the next film enters, it will not exert a force that would push the next film back. . However, only the topmost film needs to be fixed in the receive magazine; even if films stacked below move, they may affect the entry of the next film. There is no need for it to be fixed.

The receive magazine shown in FIG. 3 has the following disadvantages.

That is, as mentioned above, the high-speed film autochanger shown in the example of FIG. 1 can change the photographing interval, and accordingly, the rotational speed of the rollers 8 to 13 can also be changed. Suppose now that the strength of the leaf spring 22 is adjusted so that the film that has just entered the receive magazine when the rotational speed of the rollers 8 to 13 is high does not bounce back. Consider a case where the rotational speed of the rollers 8 to 13 is slowed down in this state to feed the film.
This situation is shown in FIG.

First, the first film enters the receive magazine, and the leading edge of the film reaches the position of the roller 21. As mentioned above, the roller 21 is pressed against the floor surface 16 with a relatively strong force, and since the rotation speed of the rollers 8 to 13 is slow, the inertia of the film is small and the tip of the film is slightly attached to the roller 21. It stops at The 2nd and subsequent films are the 4th film.
As shown in the figure, the film gradually stops at a position close to the entrance, and finally the rear end of the film cannot enter the receive magazine.

Conversely, when the rotational speed of rollers 8 to 13 is slow, the film that just enters the receive magazine is bitten by the roller 21 and is prevented from rebounding.
Assume that the strength of the leaf spring 22 is adjusted.

If the rotational speed of rollers 8 to 13 is increased to feed the film in this state, the inertia of the film will be large and the braking force of roller 21 will be insufficient, causing the film to bounce back, which is the same as when rollers 21 are not attached. An inconvenience will occur.

A receive magazine according to the present invention was invented to solve the above-mentioned disadvantages, and an example of this is shown in FIG.

In FIG. 5, 23 is a solenoid attached to the main body of the high-speed film changer, 24 is a plunger of the solenoid, and 25 is attached to a receive magazine so as to be able to slide in the direction of the arrow in the figure, and the movement of the plunger 24 is controlled by a leaf spring. 22.

The solenoid 23 retracts the plunger 24 when the high-speed film changer has a long shooting interval, that is, when the film feed speed is slow, and when the high-speed film changer has a short shooting interval, that is, when the film feed speed is slow. The plunger 24 is wired so that it sticks out when the vehicle is running fast. The movement of the plunger 24 is transmitted to the leaf spring 22 via the push button 25, so when the film feed speed of the high-speed film changer is slow, the pressure of the roller 21 against the floor surface of the film storage section is weak, and when the film feed speed is high, the pressure of the roller 21 is weak. , the pressure becomes stronger. In this way, if the pressing force of the roller 21 can be changed depending on the slowness of the film feeding speed, by appropriately adjusting the stroke of the plunger and the strength of the leaf spring, the film feeding speed can be increased. Even if it is late, the film that enters the receive magazine can be prevented from biting into the roller 21 and from going back. Even if the film feed speed changes by two or more steps, it will be practical enough if it is divided into two, a fast speed and a slow speed, at an appropriate point.

The receive magazine of the high-speed film changer shown in Figure 1 cannot be removed from the changer unless the cover of the receive magazine entry port is closed to prevent the accident of accidentally exposing the film inside the receive magazine. It's getting old.

Therefore, if the film that has been taken does not fit into the receive magazine, or if the film that has been placed in the magazine falls out of the magazine,
The receive magazine cannot be removed from the changer, and it is necessary to turn the room into a dark room and perform complicated work such as removing the cover of the changer to restore the magazine.

If the receive magazine according to the present invention is used in the high-speed film changer shown in FIG. Accidents that require this can be prevented. Another method for preventing the film entering the receive magazine from rebounding is to use a magazine such as the one shown in FIG. 5, and when the film enters the receive magazine, the plunger 24 is retracted. The tip of the film is on the roller 21
There is also a method of increasing the pressing force of the roller 21 by making the plunger 24 protrude the moment it passes through.

In this method, if the timing of turning the solenoid ON and OFF is not accurate, it will actually prevent the film from entering. Also, since the solenoid is turned ON and OFF each time a film enters, the shooting interval is
As the time becomes shorter, such as 1/6 sec, the disadvantage is that it becomes difficult for the solenoid to follow.

In the receive magazine according to the present invention, the solenoid switches only when the shooting interval changes, that is, when the film feed speed changes, so there is plenty of leeway in timing, and there is no need to worry about the solenoid not following up. There is no.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a high-speed film chainer, FIGS. 2, 3, and 4 are diagrams showing a receive magazine, and FIG. 5 is a diagram showing a receive magazine of the present invention. In the figure, 5 is the magazine, 6 is the entrance, 16 is the floor, 17 and 18 are the stoppers, 19 is the lever, 2
0 is a rotating shaft, 21 is a roller, 22 is a leaf spring, 23
is a solenoid, 24 is a plunger, and 25 is a push button.

Claims (1)

[Claims] 1. In an X-ray sheet film receive magazine into which X-ray sheet films are successively fed and stacked and stored, this receive magazine freely rotates in a tangential direction that coincides with the direction in which the sheet films enter. has a roller that does not rotate in the opposite direction, a biasing device that biases the roller in the stacking direction, and a device that adjusts the biasing force of the biasing device in accordance with the feeding speed of the sheet film. Features: Receive magazine for X-ray sheet film.