JPH01195440A - X-ray film contact device - Google Patents

Abstract

PURPOSE:To surely and smoothly perform a series of actions by transferring driving force to a roller for shifting while a back sensitization paper supporting member proceeds and recedes after X-ray photographing to be in an initial state again and performing a proceeding action and a receding action of the X-ray film between sensitization paper. CONSTITUTION:When a film F is fed between front sensitization paper 7 and back sensitization paper 9 and the tailing edge of the film F passes a film detection means 39, the driving of a roller 35 is stopped and the back sensitization paper 9 is made to move. Then the roller 35 starts rotating again and the film F is fed downward. When it is fed to a position where the upper edge of the film F is nearly coincident with the upper edge of the back sensitization paper 9, the driving of the roller 35 is stopped and X-ray photographing is performed. At the time of completing photographing, a pivot 16 rotates in an opposite direction and the back sensitization paper 9 moves, then the film F is made to move upward to stop on a position where it is put between the rollers 35 and 36. Next, the pivot 16 rotates and the film F is made to recede upward, then one cycle of actions is completed. Thus, a series of actions can be surely performed.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention automatically feeds an X-ray film between a front intensifying screen and a back intensifying screen that are arranged facing each other, and By advancing the paper toward the front intensifying screen, the X-ray film is held in close contact with the X-ray film to perform XVI photography. The present invention relates to a Ja film secret monitoring device.

[Prior Art] The present invention is a further improvement of the invention described in Japanese Patent Application Laid-open Nos. 57-82827 and 57-179834 by the present applicant. In the former invention, the X on the chest of the subject
When taking radiographs, the top edge of X-ray films of different sizes can be set in a position with a small distance from the chin rest.
The subject has the excellent advantage of being able to maintain a comfortable posture and bring his/her chest into close contact with the X-ray film, thereby obtaining clear photographs. However, in order to receive the X-ray film with the stopper, the position of the stopper must be adjusted each time depending on the size of the X-ray film, which is troublesome. After the X-ray film is received by the stopper, the X-ray film is held between the levers, and then the lever is moved forward in synchronization with the movement of the back intensifying screen moving forward after the stopper is retracted from between the intensifying screens. This has the disadvantage that the entire device becomes complicated and expensive because it requires a fairly complicated movement, and many drive systems are required to drive them.

In addition, the latter invention not only increases the cost of the flexible sheet and the clipper, but also causes the flexible sheet to be charged with static electricity during feeding, which discharges and exposes the X-ray film, and There is a risk of adverse effects on electronic circuits.

[Object of the Invention] In order to improve these conventional drawbacks, the object of the present invention is to provide a system in which a series of operations of an X-ray film can be performed reliably and smoothly with a relatively simple configuration and fewer drive systems. An object of the present invention is to provide an xm film adhesion device that has the following features.

[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to feed an X-ray film between a front intensifying screen and a back intensifying screen, and attaching the back intensifying screen to the fixed front intensifying screen. In the X-ray film adhesion device that moves forward toward the paper side and closely holds the X-ray film between the intensifying screens and performs X-ray photography, a first lever and a first lever are provided on both left and right sides of the back intensifying screen support member. Second
The proximal ends of the levers are rotatably attached, a film transfer roller is rotatably attached to the other end of the first lever, and the transfer roller and the film transfer roller are rotatably attached to the other end of the second lever. A film holding means is provided for elastically holding the X-ray film between the two, and the back intensifying screen support member moves forward to come into contact with the X-ray film, and after X-ray photography, moves back again to return to the initial state. At least one of one cycle operation
In a period, a driving force is transmitted to the transfer roller, and the X-ray film enters between the intensifying screens and/or
The X-ray film adhering device is characterized in that it includes means for performing a retreating operation from between the intensifying screens.

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

Figures 1 to 3 are side views showing different states;
FIG. 4 is a partially cutaway front view of the back intensifying screen support member. A support member 3 is provided, and the subject places his/her chin on the chin rest member 3 and presses the chest against the chest member 2 while
Side plates 5 are erected on both sides of a support member 4 that supports the 0 mechanism section where radiography is performed, and a frame 6 having an opening in the center through which X-rays pass is fixed between these side plates 5. .

A front intensifying screen support member 8 made of an X-ray transparent material is fixed to this frame 6 to which a front intensifying screen 7 is attached.

The back intensifying screen 9 that sandwiches the film with the front intensifying screen 7 is attached to the back intensifying screen support member line through the cushion layer 1o, and is provided on both sides below the back intensifying screen supporting member line. An L-shaped member 12 is supported by shafts 13 provided on the rising portions 4a and 4b of the support member 4, respectively.

A protruding shaft 14 is provided outwardly at approximately the middle of the left and right sides of the back intensifying screen support member line, and a roller 15 is rotatably attached to the tip of this shaft. Further, a pivot shaft 16 is rotatably installed between the side plates 5, and the base end portions of drive levers 17 are fixed to the left and right sides of the pivot shaft 16, respectively. A groove 18 is provided at the upper end of the driving bar 17,
A roller 15 is slidably fitted into this groove 18. The protruding shaft 14, the roller 15, and the drive lever 17 are symmetrically provided, and when the pivot shaft 16 is rotated by a drive means (not shown), the drive lever 17 swings as shown by arrow A in FIG. .

The back intensifying screen 9 and the back intensifying screen supporting member wire can be displaced from the open state shown in FIG. 1 through the intermediate state shown in FIG. 2 to the close contact state shown in FIG. 3, and vice versa.

There are also protruding shafts 1 on both left and right sides of the back intensifying screen support member line.
9 are provided facing outward, and the proximal ends of an inner first lever 20 and an outer second lever 21 are rotatably attached to these protruding shafts 19, and these first levers 20
and the second lever 21 are urged by a spring 22 so as to approach each other. The first lever 20 has a long hole 23 formed in a direction substantially perpendicular to the longitudinal direction of the first lever 20, and a protruding shaft 24 provided on the back intensifying screen support member line is inserted into the long hole 23. The first lever 20 is slidably fitted, and the first lever 20 is swingable within an angular range with respect to the line of the back intensifying screen support member. Furthermore, a protruding shaft 25 is provided at the other end of the first lever 20 and faces inward, and a film transport roller 26 is rotatably attached to this protruding shaft 25. Note that this film transport roller 2
The surface of 6 is made of a material such as rubber, which has a high frictional force and is somewhat elastic.

Further, the first lever 20 is provided with a protruding shaft 27 facing outward, and a lever 28 is rotatably attached to the protruding shaft 27. A bent portion 29 is formed at one end of the lever 28, and this bent portion 29 faces the film transport roller 26. An elastic material 30 having a large frictional force, such as rubber, is attached to the bent portion 29. The bent portion 29 is a spring 31
It is urged toward the film transport roller 26 by. A film holding part 32 is provided at the other end of the second lever 21 and is bent so as to face the film transporting roller 26. This film holding part 32 is directed toward the film transporting roller 26 by a spring 22. is energized.

The side plate 5 is provided with two protrusions 33 and 34 facing inward, and when the back intensifying screen support member line retreats, the lever 28
One end hits the protrusion 33 and the pressure contact between the bent part 29 and the film transport roller 26 is released, and the protrusion 34 touches the second protrusion 33.
The pressure contact between the film transport roller 26 and the film holding portion 32 is released when the film transfer roller 26 hits the lever 21 .

In this case, the movement of the first lever 20 is stopped by the protruding shaft 24.

A roller 35 is rotatably installed between the side plates 5,
It is rotated by a drive means (not shown). Another roller 36, which is rotatably held, is pressed against this roller 35 by a biasing means (not shown), and the film F is fed between these rollers 35 and 36. Note that these rollers 35.
36 may be installed between the side plates 5, or may be provided separately on both the left and right sides.

A roller 38 is rotatably attached to the other end of the lever 37, one end of which is rotatably supported at the center of rotation of the roller 35, and this roller 38 is pressed against the roller 35 by a spring (not shown). The rotation is transmitted to the roller 38. In addition, the roller 38
The surface is made of a material that has a high frictional force and is somewhat elastic, such as rubber. Incidentally, near the rollers 35 and 36, a film detection means 39 is provided which detects that the film F has passed and generates an electric signal.

FIG. 1 shows the pressure contact between the bending part 29 and the film transport roller 26, and the film transport roller 26 and the film holding part 3.
FIG. 2 shows a state in which the pressure contact between the folding portion 29 and the film transport roller 26 has been released, and the film transport roller 26 and the film holding portion 32 are in pressure contact with each other. When the back intensifying screen supporting member line advances a little further than this, the bending portion 29 and the film transport roller 26 will also come into pressure contact, and in the close contact state shown in FIG. 3, both will be in a state of pressure contact. .

Next, a series of operations will be explained with reference to FIGS. 1 to 3.

Each mechanism is initially in the position shown in FIG. 1, with the back intensifying screen support member line retracted. Here, the film F is transported to the roller 35 by a film feeding means (not shown).
36 and is fed between the front intensifying screen 7 and the back intensifying screen 9 by rollers 35 and 36. At this time, the film transport roller 26 and the film holding section 32
There is an open space between them. When the trailing edge of the film F passes the film detection means 39 while being sandwiched between the rollers 35 and 36, or when the film F has passed and has advanced a certain distance, or when a certain period of time has elapsed after passing the film F. Then, the drive of the roller 35 is stopped.Then, the pivot 16 rotates to move the back intensifying screen support member line, and the back intensifying screen 9 is moved to the position shown in FIG. In this position, as described above, the film transport roller 26 and the film holding part 32 are in pressure contact, while the bending part 29 and the film transport roller 2 are in pressure contact with each other.
It is separated from 6.

Subsequently, the roller 35 starts rotating again, and the film F is sent downward by the driving force of both the roller 35 and the film transport roller 26. and.

When the film F leaves the roller 35, the film F is sent downward by the driving force of the film transport roller 26. When the upper end of the film F is fed to a position where it almost coincides with the upper end of the back intensifying screen 9, the driving of the roller 35 is stopped. Furthermore, the pivot 16 rotates and the back intensifying screen 9 moves forward, but the roller 3 moves forward at a position slightly advanced from the position shown in FIG.
8 and the film transport roller 26 are released, and almost at the same time, the folding portion 29 and the film transport roller 26 are pressed, preventing the film transport roller 26 from rotating due to the weight of the film F. do.

While maintaining this state, the back intensifying screen 9 is moved to the position shown in FIG. 3, and X-ray photography is performed at this position.

When the X-ray imaging is completed, the pivot 16 rotates in the opposite direction and the back intensifying screen 9 moves to the position shown in FIG. 2, and at this position the roller 35 rotates in the opposite direction to move the film F upward.
The film F stops at the position where it is sandwiched between the rollers 35 and 36.Then, the pivot 16 rotates again to reach the state shown in Fig. 1, and at this position the roller 35 rotates to move the film F upward. , one cycle of operation is completed.

In the above embodiment, the film F is sandwiched between the film transport roller 26 and the film holding section 32, but a roller may be used instead of the film holding section 32.However, from the viewpoint of image quality, the film F is held between the film transport roller 26 and the film holding section 32. F and breastplate member 2
Since it is preferable that the distance between the film holding part 32 and the film holding part 32 be as small as possible, the roller provided in place of the film holding part 32 cannot be made too large.

Also, in this embodiment, three states shown in FIGS. 1, 2, and 3 are set, but only the two states shown in FIGS. 2 and 3 may be set. In this case, In this case, the film F is first fed in the state shown in FIG. 2, and is fed to a position where the top edge of the film F almost coincides with the top edge of the back intensifying screen 9, without stopping once as in the previous embodiment. Stop. In this state, the back intensifying screen 9 moves forward and comes into close contact with the front intensifying screen 7, as in the previous embodiment, and X-ray photography is performed. After photographing, the back intensifying screen 9 retreats again and reaches the position shown in FIG. Film F will be moved. In this case, since there is a risk that the film F may be rubbed and damaged in the film holding part 32 when it is fed, it is preferable to use a roller instead of the film holding part 32 as the film holding means.

In the case of the above-mentioned first embodiment, the film F is moved to the lever 28 during the last period when the film F enters between the intensifying screens 7 and 9, and during the first period when it exits from between the intensifying screens 7 and There is a risk that the film F will be scratched as it is being fed between the film transport rollers 26 and 26, but as shown in FIG. Therefore, it does not interfere with actual diagnosis.

Also, since gravity is not used in the above series of operations,
For example, in FIG. 1, it is possible to realize a three-dimensional type with the upper part facing up and a bed type with the right side facing up using common equipment. In other words, since the mechanism for holding the film F in a fixed position and feeding the film F out from the fixed position is integrated with the back intensifying screen support member line, the film F entry and feed positions are as shown in FIG. ~ As shown in FIG. 3, even if the distance is quite large, it can be easily realized with a simple configuration. This provides the advantage that the distance between the upper end of the film F and the chin rest can be significantly reduced, and that the subject can have a sufficiently large escape area for his or her chin.

In this embodiment, when the film F enters between the intensifying screens 7 and 9 and when it is sent out, the film F is moved by the driving force of the transfer roller 26, but only one of them is moved by the transfer roller 26. For example, when entering the film F, the film F is moved by the driving force of the transfer roller 26, and when sending it out, the film F is allowed to fall naturally by gravity. , after scraping off the film F with another scraping means,
The film F is moved by a roller provided below the back intensifying screen 9.
may be sent downward.

Further, when entering the film, the transport roller 26 and the film holding part 32 are kept open, and a film stopper is provided at the lower end of the back intensifying screen 9, so that the driving force of the rollers 35 and 36 and the inertial force of the film F are Film F by gravity
It is also possible to carry out the procedure as in this embodiment only when feeding the film F until the lower end thereof hits the stopper, performing T:R photography in this state, and then feeding the film F.

[Effects of the Invention] As explained above, the X-ray film adhesion device according to the present invention has a relatively simple configuration and a minimum drive system, and can perform three operations of the X-ray film, namely, the opening of the roller and the film holding means. The back intensifying screen moves forward while the rollers and film nipping means sandwich and fix the film. It is possible to perform close contact and retreat movements. In addition, the X-ray film is reliably fed between the intensifying screens without damaging the X-ray film, and then they are brought into close contact with each other, and then after the imaging is completed, the space between the intensifying screens is opened and the X-ray film is removed. A series of operations can be performed reliably against the stickiness of the X-ray film under high humidity and the sticking of the X-ray film due to static electricity in a dry state.

[Brief explanation of the drawing]

The drawings show an embodiment of the X-ray film adhering device according to the present invention, and FIG. 1 is a side view thereof, FIGS. 2 and 3 are side views of the main parts in a displaced state, and FIG. 4 is a back intensifying screen. FIG. 3 is a front view of the support member with a portion thereof cut away. Symbol l is a film changer, 2 is a breast plate member, 3 is a chin rest member, 4 is a support member, 7 is a front intensifying screen, 8 is a front intensifying screen support member, 9 is a back intensifying screen, and the line is a back intensifying screen Paper support member, 13 is a shaft, 15.26.35.36.
38 is a roller, 16 is a pivot, 17 is a drive lever, 2o is a first lever, 21 is a second lever, 22.31 is a spring, 23 is an elongated hole, and 24.25 is a protruding shaft. 28 and 37 are levers, 29 is a bending portion, 32 is a film holding portion, 33 and 34 are protrusions, and 39 is a film detection means. Patent applicant Canon Co., Ltd. Figure 2

Claims (1)

[Claims] 1. Feed an X-ray film between a front intensifying screen and a back intensifying screen, and advance the back intensifying screen toward the fixed front intensifying screen to remove the X-ray film. In the X-ray film adhesion device that performs X-ray photography by closely holding the intensifying screen between the intensifying screens, base ends of the first lever and the second lever are rotated on both left and right sides of the back intensifying screen support member. A film transfer roller is rotatably attached to the other end of the first lever, and the X-ray film is elastically attached to the other end of the second lever between the roller and the transfer roller. At least one period of one cycle operation in which the back intensifying screen support member moves forward and becomes in close contact with each other, and then retreats again after X-ray imaging to return to the initial state. The method is characterized by comprising means for transmitting a driving force to the transfer roller to cause the X-ray film to enter between the intensifying screens and/or move away from between the intensifying screens. X-ray film adhesion device. 2. A patent claim comprising means for separating the film transporting roller and the film nipping means from each other, the transporting roller and the film nipping means being separated from each other during at least one period of the one cycle operation. The X-ray film adhesion device according to item 1.