JPS6059581B2 - Sheet film X-ray imaging device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an X-ray imaging device that performs X-ray photography using a sheet film, and in particular to an X-ray imaging device that aims to reduce the weight of the film storage case by improving the shutter opening/closing mechanism of the film storage case. It is.

An X-ray imaging device using sheet film prepares multiple sheets of sheet film that have not yet been imaged. At the time of imaging, these sheet films are taken out one by one, held in a close contact holder that holds and moves the film, and placed in a standby position. Leave it for a while,
While observing the fluoroscopic image of the affected area of the subject using an X-ray television fluoroscopic device, when the desired state is reached, the close contact holder is sent to the imaging position, and at the same time, a sufficient dose of X-rays is irradiated for imaging. There is an apparatus in which the close contact holder is returned to the standby position, the photographed film is removed, and the photographed film is replaced with an unexposed film, and the above-mentioned operations are repeated to proceed with photographing. FIG. 1 is a diagram showing a schematic configuration of a conventional sheet film X-ray imaging apparatus. Its structure and operation are explained as follows.

That is, in the figure, 1 is an unshot film storage case that stores unshot sheet films 2, and a plurality of sheet films 2 stored in this unshot film storage case 1 are collected from a pool on the upper side. Up and down arrows U-D in order
A suction cup 3, which is movable in the L and R directions, picks up and takes out the unshot film one by one from an opening provided in the upper part of the unshot film storage case 1.

Then, when the suction cup 3 is moved to the position of the pair of transport rollers 4, the sheet film 2 can be held by the transport rollers 4.

As a result, the sheet film 2 is sandwiched between the conveyance rollers 4 and conveyed between the contact holders 5 placed open at the standby position 6.

When the sheet film 2 is fed in, the top lid 5A of the close contact holder 5 closes in the direction of arrow B, and the sheet film 2 is held between the close-contact holders 5. The camera waits at this standby position 6 until a photographing command is given.

When an imaging command is received, the contact holder 5 is sent to the imaging position 7, which is the irradiation field position of the X-ray tube XT, and is returned to the standby position 6 after imaging is completed.

Here, the close contact holder 5 is opened, and at the same time, the conveyance roller 4 is reversely rotated.

Then, the photographed filter in the close contact holder 5 is taken out while being pinched by the reversing conveyance rollers 4. At this time, a direction switching plate 8 provided on the exit side of the conveying roller 4 uses the pivot 8 as a fulcrum to guide the photographed sheet film, which is being fed upward in the direction of arrow E, to a guide 9.
lead to the side. Thereby, the photographed sheet film is guided through the guide 9 and sent to the photographed film storage case 10 provided at the lower part of the unphotographed film storage case 1, and is stored therein.

Incidentally, as shown in FIG. 1, film storage cases 1 and 10 are used to separately store photographed and unphotographed sheet films.

These film storage cases 1 and 10 are sheet film
When loading and unloading from the X-ray imaging device, the case shutter, which is the opening/closing door of the opening, automatically opens so that the film can be taken in and out of the sheet film X-ray imaging device. The shutter is closed to prevent the film from being exposed to light. FIGS. 2 and 3 show a conventional method of opening and closing a case shutter using the attachment/detachment of a film storage case in a film X-ray imaging apparatus.

As shown in FIG. 2, the film storage case main body 21 has an opening 21 on one end side of the top surface for taking in and out the film 22.
It has a double box structure consisting of an inner box 21a having a diameter of 1.3 mm and a cylindrical outer box 21b placed over the inner box 21a to open and close the opening 21c.The film 22 can be stored in the case body 21 and carried. In case of emergency, the outer box 21b is replaced with the inner box 2 as shown in Figure 2.
1b is positioned to cover the film outlet 21c of the inner box 21a, making the interior light-shielded.

In this type of device, a film storage case 1 is inserted into a film storage case insertion slot 23 provided in a sheet film X-ray imaging device.
Insert the main body 21 and push the inner box 21b to open the outer box 21a.
The end face 21d hits the stopper part 23a in the film storage case insertion opening 23, preventing movement of the outer box 21a, and only the inner box 21b slides, opening the film ejection opening 21c as shown in FIG. Become.

Then, the film 22 becomes ready to be transported. Although not shown, the outer box 21b is provided with a hole for a stopper, into which a pin is inserted to keep the outer box 21b in a fixed position. Therefore, when the handle 24 is pulled in order to pull out the film storage case 21 from the sheet film X-ray imaging device, only the inner box 21a will be slid, and the slide will be removed when the outer box 21b is closed as shown in FIG. thwarted.
Then, when the pin is removed from the hole and the film storage case 21 is taken out from the sheet film X-ray imaging device, the opening 2
Since 1c is in a closed state, the film 22 inside can be protected from external light.

In this way, the film storage case 21 is
When the film 22 is attached to or removed from the radiographing apparatus, the opening 21c is automatically opened and closed so that the film 22 inside can be protected and carried in and out.

By the way, the film storage case with this structure has a double box structure of the outer box 21b and the inner box 21a, and since the film size to be stored is large, such as many large-sized films, it is difficult to maintain structural strength. They are usually thick-walled structures made of metal such as aluminum. Therefore, the film storage case is heavy and has the disadvantage of being a heavy burden to carry.

The present invention has been made in view of the above circumstances, and includes a sliding door-shaped shutter that slides in the attachment/detachment direction of the film storage case at the opening of the film storage case to open and close the opening. An operation piece is provided on the outer surface with a side surface inclined in the opening/closing direction of the shutter, and the mounting part of the photographing device to which the film storage case 1 is mounted has an operating piece near the entrance that rotates in the opening/closing direction of the shutter. A first lever is provided, which is movable and biased in the shutter closing direction, and a stopper pin is provided that contacts the first lever to stop the lever at a predetermined position, and a stopper pin is provided that is coaxial with the first lever. a second lever that is supported by the lever, is biased with a weak biasing force in the direction of opening the shutter, is normally restricted from rotating by contacting the contact portion with the first lever, and has a protrusion that contacts the operating piece; A lever is provided, and a stopper is further provided at the rear of the protrusion position to contact the operation piece and prevent its movement, and when the film storage case is attached, the protrusion of the second lever and the shutter operation piece are connected. Upon contact, the second lever, which has a weak biasing force, is rotated in the shutter closing direction and passed, and a stopper behind it prevents the operation piece from moving, and the shutter is opened as the film storage case is moved. Further, when pulling out the film storage case, as the pulling operation by the operator progresses, the end of the operating piece comes into contact with the protrusion of the second lever and the first lever is pulled out.
The biasing force of the first lever is applied to the operating piece to prevent its movement, thereby closing the shutter, and after closing, the biasing force of the first lever is overcome by the operating force of the operator to pull out the film storage case, By rotating and pulling out the first lever, the opening of the film storage case can be automatically opened and closed by the attachment/detachment operation, and the opening of the film storage case can be closed with a plate-shaped shutter. An object of the present invention is to provide a sheet film X-ray imaging device that is lightweight and easy to transport. An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.

The film storage case used in this apparatus has a structure as shown in FIGS. 4A and 4B.

That is, in the figure, 41 is a box-shaped case body, and an opening 41a for taking in and out the internal film F is provided near one end of the upper surface in the longitudinal direction.

Further, a shutter 42 for opening and closing an opening 41a on the top surface of the case body 41 is slidably fitted into a guide groove 41b provided inside the case body 41 along its longitudinal direction. Furthermore, on the upper surface of the shutter 42, there is a pair of opening/closing dogs 43, 43'' located near both longitudinal sides of the case body 41 for opening and closing the shutter 42.
is provided. This opening/closing dog 43, 43'' is the tapered portion 4
3a, 43a'', and the opening/closing dogs 43, 43'' are attached so as to become thinner toward the opposite short side of the case body of the shutter 42 when closed.

Also, the top surface of the opening/closing dogs 43, 43'' is connected to the case body 4.
It is made to protrude from the top surface of 1.

44 is a handle of the case body 41.

FIGS. 5A and 5B show an operating mechanism for opening and closing the shutter 42 when attaching and detaching the case body 41 having the above structure, and FIG. 5A is a plan view seen from below, and FIG. 5B is a front view. Such an operating mechanism 51 is provided at the upper part of the mounting portion of the film storage case 41 of the sheet film X-ray imaging apparatus, and its structure will be explained in detail as follows.

That is, in the figure, 52 is a flat base, and 53 is a shaft fixed to this base 52.

54 is a first lever rotatably supported at one end on this shaft 53, 55 is a first pin protruding from the middle part of this lever 54, and 56 is a first pin on the free end side of the lever 54. It is a pin (or hole may be used) for spring engagement provided.

Reference numeral 57 denotes a second lever whose intermediate portion is rotatably supported by the shaft 53, and 58 is provided protruding from one end side of this lever 57, and when the film storage case 41 is attached, the opening/closing dogs 43, 43'' are attached. A boss 59 with which the tapered portions 43a and 43a'' come into contact is a spring engagement pin (or hole) provided on the other end side of the lever 57.

Reference numeral 60 denotes the first lever 54 protruding from the base 52.
This stopper pin 60 prevents the first lever 54 from rotating clockwise in the figure from this position.

61 is a spring engagement pin provided on the base 52, and 62 is stretched between this pin 61 and the pin 59 of the second lever 57, and the second lever 57 is rotated counterclockwise in the figure. a first spring biasing in the direction 6;
3 is a second spring l that is stretched between the pin 61 and the pin 56 of the first lever 54 and biases the first lever 54 clockwise in the figure;
The spring 62 is considerably weaker than the second spring 63, and is weaker than the opening/closing force of the shutter 42.

A dog stopper 64 is provided on the base 52 and serves as a stopper in contact with the opening/closing dog 43.

The stopper pin 60 contacts only the first lever 54, and the pin 55 of the first lever 54 contacts the second lever 5.
Close to 7. The first and second levers 54 and 57 are biased by springs 63 and 62 and receive rotational forces in opposite directions. FIG. 6 is a side sectional view showing the positional relationship between the operating mechanism 51 and the film storage case 41.

As shown in the figure, when the film storage case 41 is attached to the mounting section S of the X-ray imaging apparatus, the boss 58 of the operating mechanism 51 comes into contact with the tapered part 43a of the opening/closing dog 43 only in the initial stage of the mounting operation, but thereafter the opening/closing dog 43 does not move. Move away from boss 58.

Further, when taking out the film storage case 41 from the X-ray imaging apparatus, the vertical surface of the rear end surface 43c of the opening/closing dog 43 contacts the boss 58. The opening/closing dogs 43, 43'' are such that the shutter 42 is guided on both sides by the groove 41b.
In order to prevent uneven operating force from being applied to the shutter 42, a pair is provided on both the left and right sides of the shutter 42 to ensure smooth opening and closing operations, and the operating mechanism 51 is also positioned at the position corresponding to each opening/closing dog 43, 43''. Next, the operation of this apparatus having the above configuration will be explained.The film storage case 41 is installed in the mounting part S of the X-ray imaging apparatus
opening 4 of the film storage case 41.
The opening/closing tog 43 of the shutter 42 that closes the shutter 1a is the fifth
As shown in the figure, the taper portion 43a contacts the boss 58 at position A. The second lever 5 to which this boss 58 is attached
7 is biased in the counterclockwise direction by a spring 62, and the opening/closing dog 43 is in a shape opposite to the direction of bias. The spring force of the opening/closing tog 62 is weaker than the opening/closing force of the shutter 42, and since the opening/closing tog 43 comes into contact with its tapered part, the second lever 57 is rotated clockwise by being pushed by the opening/closing dog 43. The boss 58 is moved by the opening/closing dog 43
slides on the tapered portion 43a. As a result, the film storage case 41 is pushed into the X-ray imaging apparatus without the shutter 42 being opened. When the opening/closing dog 43 is removed from the position of the boss 58, the second lever 57 returns to its original position and comes into contact with the pin 55 of the first lever 54 and stops. When the film storage case 41 is further pushed in, the opening/closing dog 43 reaches the position B in FIG. 5, and its tip comes into contact with the dog stopper 64.

As a result, the opening/closing dog 43 is prevented from moving, so as the film storage case 41 is pushed in, the shutter 42 opens to completely cover the opening 41a. Next, when the film storage case 41 is pulled out after X-ray photography or the like is completed, the vertical end surface of the opening/closing dog 43 comes into contact with the boss 58 of the second lever 57 at position C in FIG.

Then, the second lever 57 receives a force in the counterclockwise direction, which is opposite to that at the time of insertion, by the force applied to the opening/closing dog 43. However, the second lever 57 is in contact with the pin 55 of the first lever 54 which is receiving a biasing force in the clockwise direction. By making the spring 63 that applies a biasing force to the lever 54 of 1 larger than the force required to open and close the shutter 42, this biasing force can prevent the opening/closing dog 43 from moving. 42 will be closed.

After the shutter 42 is closed, the film storage case 41
The second and first levers 57, 54 are rotated counterclockwise by the force of the operator pulling the handle 44 against the biasing force of the spring 63, and the film storage case 41 is pulled out. . In this way, a sliding door-shaped shutter is provided at the opening of the film storage case to open and close the opening by sliding in the direction of attaching and removing the film storage case, and the outer surface of the shutter is provided with a side surface that slopes in the direction of opening and closing. An opening/closing dog 43, which is an operating piece, is provided near the entrance of the mounting portion of the photographing device to which the film storage case is mounted, and is rotatable in the shutter opening/closing direction and biased in the shutter closing direction. A first lever to which a force is applied is provided, and a stopper pin is provided that engages with the first lever to stop it at a predetermined position, and the first lever is rotated about the same rotation axis as the first lever. a second lever is biased in the shutter opening direction with a weak biasing force, is normally restricted from rotating by contacting the first lever, and has a protrusion that contacts the opening/closing dog; Furthermore, a stopper is provided at the rear of this protrusion position to contact the opening/closing dog and prevent its movement, so that when the film storage case is attached, the stopper is biased when the protrusion of the second lever comes into contact with the opening/closing dog of the shutter. A second lever with a weaker force is rotated in the shutter closing direction, and a stopper behind it prevents the movement of the opening/closing dog so that the shutter is opened with the movement of the film storage case being pushed in. When pulling out the case, the end of the opening/closing dog comes into contact with the protrusion of the second lever as the operator continues to pull out the case.
The biasing force of the first lever is applied to the opening/closing dog to prevent its movement, thereby closing the shutter, and after closing, the biasing force of the first lever is overcome by the operator's pulling force of the film storage case. The opening of the film storage case can be opened and closed automatically by rotating and pulling out the first lever, and the opening of the film storage case is thinner instead of the conventional double box structure. Sheet film X-rays are structurally lightweight because they only require a shutter made of plate material, and the case body can also be made of synthetic resin to reduce the weight of the layer.In addition, it is easy to transport and has an easy-to-use film storage compartment that can be opened and closed automatically. A photographic device can be provided. It should be noted that the present invention is not limited to the embodiments described above and shown on the screen, but can be modified and implemented as appropriate without changing the gist thereof. Although the centers of rotation are the same, they may be placed at different positions, and the two levers are brought into contact by a pin provided on the first lever, but this is not limited to a pin; Alternatively, the opening/closing dog may be provided on the second lever, or one opening/closing dog may be provided on each side of the shutter, but one or more opening/closing dogs may be provided depending on the situation. In that case, the operating mechanisms may be provided in correspondence with each other, but the biasing force of the first lever may be as long as the biasing force necessary for opening and closing the shutter can be obtained in total.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the schematic configuration of an X-ray imaging device using sheet film, Fig. 2 is a side sectional view showing the structure of a conventional film storage case, and Fig. 3 is a diagram showing the opening of the case when it is installed. Figures 4A and 4B are side sectional views and plan views showing the structure of the film storage case used in the apparatus of the present invention, and Figures 5A and 5B are the structure of the operating mechanism according to the present invention. FIG. 6 is a bottom view and a side view showing the film storage case, and FIG. 6 is a side sectional view showing the relationship between the film storage case and the operating mechanism at the time of installation. 41...Case body, 41a...Opening, 41"b...Groove, 42...Shutter, 43...Opening/closing dog, 43a ... Taper part, 44 ... Handle, 51 ... Operation mechanism, 52 ... Base, 53 ... Shaft, 5
4...First lever, 55, 56, 59, 60
...Pin, 57...Second lever, 58.
...Hose, 60...Stopper pin, 62,
63... Spring, S... Mounting part.

Claims (1)

[Claims] 1. In a sheet film X-ray imaging apparatus in which sheet film is taken out one after another and used for imaging, a film storage case that stores sheet film is slid into the film loading/unloading opening of the film storage case in the attachment/detachment direction of the film storage case. A sheet film X-ray imaging device is provided with a substantially plate-shaped shutter for opening and closing the lever opening, and an operating piece inclined in the closing direction on the outer surface of the shutter, and a sheet film X-ray imaging device to which the film storage case is attached. A first lever is provided in the vicinity of the entrance of the mounting part, which is rotatable in the direction of opening and closing the shutter about a support shaft, is biased in the direction of closing the shutter, and is normally in a fixed position; A protrusion that is biased with a weak force in the direction of opening the shutter, is normally in contact with the first lever through the contact portion, is restricted from rotating, and is in contact with the operating piece to apply an operating force to the operating piece. A seat characterized in that a second lever is rotatably supported on a shaft and has a second lever, and a stopper is provided at the rear of the protruding portion in contact with the operating piece to prevent its movement and open the shutter. Film X-ray photography device.