JP2753579B2 - X-ray film adhesion device - Google Patents

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 which are arranged opposite to each other, and further back sensitizes. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray film contact apparatus which performs X-ray photography by pinching and contacting an X-ray film by advancing paper to a front intensifying screen side.

[Prior Art] The present invention is disclosed in Japanese Patent Application Laid-Open No. 57-82827,
This is a further improvement of the invention described in JP-A-7-179834. In the former invention, when performing X-ray imaging of the chest of the subject, the upper end of the X-ray film having a different size can be set at a position with a small distance from the chin rest. Can be brought into close contact with an X-ray film, and thus a clear photograph can be obtained. However, in order to receive the X-ray film with the stopper, there is a trouble that the position of the stopper must be adjusted each time depending on the size of the X-ray film. After the X-ray film is received by the stopper, the X-ray film is sandwiched by the lever, and then the lever is advanced in synchronization with the operation of the back intensifying screen advancing after the stopper retracts from between the intensifying screens. There is a drawback that the whole apparatus becomes complicated and expensive because, for example, a considerably complicated movement must be performed, and a large number of drive systems are required to drive these.

Further, in the latter invention, not only the cost of the flexible sheet and the clipper is high, but also the flexible sheet is charged with static electricity during feeding, and this discharges the X-ray film, and the X-ray film is exposed. There is a possibility that the electronic circuit may be adversely affected.

[Object of the Invention] An object of the present invention is to provide an X-ray film capable of reliably and smoothly performing a series of operations of an X-ray film with a relatively simple configuration in order to improve such a conventional drawback. An object of the present invention is to provide a contact device.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to provide a front intensifying screen support member and a back intensifying screen supporting member, wherein a front intensifying screen and a back intensifying screen are provided. An X-ray film contacting device for feeding an X-ray film, advancing the back intensifying screen to the fixed front intensifying screen, and holding the X-ray film in close contact with the intensifying screen to perform X-ray photography. ,
The back intensifying screen support member is provided with a lever mechanism provided with a film transfer roller attached to one end and having a film holding structure for elastically holding and holding the X-ray film using the transfer roller on one side. At least in one cycle operation until the back intensifying screen support member moves forward to come into close contact with the back intensifying screen support member after X-ray imaging and returns to the initial state. Transmitting a driving force to the transfer roller during a part of the time during the operation of entering the X-ray film between the intensifying screens and / or during the operation of leaving the intensifying screen between the intensifying screens;
An X-ray film contact device, wherein an operation of entering the X-ray film between the intensifying screens and / or an operation of retreating from the space between the intensifying screens is performed.

[Embodiment of the Invention] The present invention will be described in detail based on the illustrated embodiment.

1 to 3 are side views showing different states, FIG. 4 is a time chart, and FIG. 5 is a front view in which a part of a back intensifying screen support member is cut away. In the drawings, reference numeral 1 denotes a film changer, in which a chest pad 2 having X-ray transparency and a chin pad 3 are provided above the film changer, and a subject places his / her chin on the chin pad 3.
X-ray photography is performed with the chest resting on the chest rest member 2.
Side plates 5 are erected on both sides of a support member 4 that supports the mechanism, and a frame 6 having an opening through which X-rays are provided in the center is fixed between the side plates 5. A front intensifying screen support member 8 made of an X-ray transmissive material for attaching the front intensifying screen 7 is fixed to the frame 6. A back intensifying screen 9 for sandwiching a film between the front intensifying screen 7 is attached to a back intensifying screen support member 11 via a cushion layer 10 and provided on both lower sides of the back intensifying screen supporting member 11. The L-shaped member 12 is supported by shafts 13 provided at the rising portions 4a and 4b of the support member 4, respectively.

A projecting shaft 14 is provided at an approximately middle portion between the left and right sides of the back intensifying screen support member 11 so as to face outward.
15 is rotatably mounted. A pivot 16 is rotatably mounted between the side plates 5, and a base end of a drive lever 17 is fixed to each of the left and right sides of the pivot 16. A groove 18 is provided at the upper end of the drive lever 17, and the roller 15 is slidably fitted in the groove 18. Projection shaft 14, roller
15. The same drive lever 17 is provided symmetrically to the left and right. When the pivot 16 is rotated by drive means (not shown), the drive lever 17 swings as shown by the arrow A in FIG. The support member 9 and the back intensifying screen support member 11 can be displaced from the open state shown in FIG. 1 to the close state shown in FIG. 3 through the middle state shown in FIG. 2 and vice versa.

The left and right sides of the back intensifying screen support member 11 have additional protruding axes.
The protruding shafts 19 are provided with the base ends of the inner first lever 20 and the outer second lever 21 so as to be freely rotatable. The second lever 21 forms a lever mechanism, and is urged by a spring 22 to approach each other. The first lever 20 is provided with a long hole 23 in a direction substantially perpendicular to the longitudinal direction of the first lever 20, and a projecting shaft 24 provided on the back intensifying screen support member 11 in this long hole 23. The first lever 20 is slidably fitted, and is swingable within a certain angle range with respect to the back intensifying screen support member 11.

Further, the other end of the first lever 20 has a protruding shaft
A film transfer roller 26 is rotatably attached to the protruding shaft 25. The surface of the film transfer roller 26 has a large frictional force such as rubber, for example.
And it is made of a somewhat elastic material. Furthermore, the first
The lever 20 has 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, the bent portion 29 is opposed to the film transfer roller 26, and an elastic material 30 having a large frictional force such as rubber is attached to the bent portion 29, Bending part
The spring 29 is urged toward the film transport roller 26 by a spring 31. The other end of the second lever 21 is provided with a film holding portion 32 bent so as to face the film transfer roller 26, and the film holding portion 32 is directed toward the film transfer roller 26 by the spring 22. Have been energized.

Two projections 33 and 34 are provided on the side plate 5 toward the inside. When the back intensifying screen support member 11 is retracted, one end of the lever 28 hits the projection 33 and the bent portion 29 and the film transport roller 26 are moved. Is released, and the projection 34 is further moved to the second lever 21.
In this case, the pressure contact between the film transport roller 26 and the film holding portion 32 is released. In this case, the movement of the first lever 20 is stopped by the protruding shaft 24.

A roller 35 is rotatably mounted between the side plates 5,
It is configured to be rotated by driving means (not shown). Another roller 36, which is rotatably held, is pressed against the roller 35 by urging means (not shown) so that the film F is fed between the rollers 35 and 36. In addition, these alars 35 and 36 are
It may be provided between them, or may be provided separately on both left and right sides.

A roller 38 is rotatably attached to the other end of the lever 37 whose one end is rotatably supported at the rotation center of the roller 35. The roller 38 is pressed against the roller 35 by a spring (not shown), The rotation is transmitted to the roller 38. The surface of the roller 38 is made of a material having a large frictional force such as rubber and having some elasticity. In the vicinity of the rollers 35 and 36, a film detecting means 39 for detecting that the film F has passed and generating an electric signal is provided.

FIG. 1 shows a state in which the pressure contact between the bent portion 29 and the film transfer roller 26 and the pressure contact between the film transfer roller 26 and the film holding portion 32 have been released, and FIG. This shows a state in which the pressure contact between the film transfer roller 26 and the film transfer roller 26 has been released, and the film transfer roller 26 and the film holding portion 32 have been pressed against each other. The film transfer roller 26 is also in a pressed state, and in the close contact state shown in FIG. 3, both are in a pressed state.

Next, a series of operations will be described with reference to FIGS. Each mechanism is initially in a state where the back intensifying screen support member 11 is retracted, that is, the position shown in FIG. Here, the film F is transferred to the roller 3 by a film feeding means (not shown).
It is inserted between 5 and 36 and fed between the front intensifying screen 7 and the back intensifying screen 9 by the rollers 35 and 36. At this time, the space between the film transport roller 26 and the film holding portion 32 is open. As a result, the film F can be fed between the intensifying screens without any resistance. When the rear end of the film F has passed through the film detecting means 39, or has advanced a certain distance after passing, or when a certain period of time has passed after the film F has been sandwiched between the rollers 35 and 36, Roller 35
Is stopped. Next, the pivot 16 rotates to move the back intensifying screen support member 11 to move the back intensifying screen 9 to the position shown in FIG. In this position, as described above, the film moving roller 26 and the film holding portion 32 are in pressure contact with each other,
On the other hand, the bent portion 29 and the film transfer roller 26 are separated from each other.

Subsequently, the roller 35 starts rotating again, and the film F is driven by the driving force of both the roller 35 and the film transport roller 26.
Is sent down. When the film F separates from 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 substantially coincident with the upper end of the back intensifying screen 9, the driving of the roller 35 is stopped. Further, the pivot 16 rotates and the back intensifying screen 9 advances, but at a position slightly advanced from the position shown in FIG. 2, the pressure contact state between the roller 38 and the film transport roller 26 is released, and the bending section is almost simultaneously. The film transfer roller 26 is pressed against the film transfer roller 29 to prevent the film transfer roller 26 from rotating due to the weight of the film F. While maintaining this state, the back intensifying screen 9 moves to the position shown in FIG. 3, and X-ray imaging is performed at this position.

When the radiography is completed, the pivot 16 rotates in the reverse direction, and the back intensifying screen 9 moves to the position shown in FIG.
35 rotates in the opposite direction to move the film F upward, and stops at a position where the film F is sandwiched between the rollers 35 and 36. Then, the pivot 16 is again rotated to the state shown in FIG. 1, and as shown in FIG. 1, the space between the film transfer roller 26 and the film holding portion 32 is opened, so that the film F can be formed without resistance. The roller 35 rotates at the position and the film F
Is retreated upward, and one cycle of the operation is completed.

FIG. 4 is a time chart showing the relationship between the rotation states of the rollers 35 and 26 and the state of each part in one cycle described above.

In the above-described embodiment, the example in which the film F is nipped by the film transport roller 26 and the film nipping part 32 is shown, but a roller may be used instead of the film nipping part 32. However, it is preferable that the distance between the film F and the breastplate 2 during photographing is as small as possible from the viewpoint of image quality, so that the roller provided in place of the film holding portion 32 cannot be made too large.

Further, in the present embodiment, 3 shown in FIG. 1, FIG. 2, and FIG.
Although two states are set, only the two states shown in FIGS. 2 and 3 may be set. In this case, the film F is first fed in the state shown in FIG. 2, and is fed to a position where the upper end of the film F almost coincides with the upper end of the back intensifying screen 9 without stopping as in the above-described embodiment. And stop. In this state, the back screen 9
Moves forward and comes into close contact with the front intensifying screen 7 to perform X-ray photography. Then, after photographing, the back intensifying screen 9 retreats again and the second
At the position shown in the figure, the film F is moved by the driving force of both the roller 35 and the film transport roller 26 until the roller 35 rotates and the film F retreats. In this case, since the film F may be rubbed and damaged when the film F is fed in the film holding section 32, it is preferable to use a roller instead of the film holding section 32 as the film holding means.

Also in the case of the first embodiment, the film F is held between the intensifying screens 7 and 9 at the last time when the film F enters the space between the intensifying screens 7 and 9 and the film F is held between the intensifying screens 7 and 9 at the first time. Since the film F is sent while being sandwiched between the portion 32 and the film transport roller 26, there is a possibility that the film F may be damaged, but as shown in FIG.
Since this portion is only a small portion above the both edges of the film F, it does not hinder the actual diagnosis. Further, since the mechanism for holding the film F in the home position and sending the film F out of the home position is integrated with the back intensifying screen support member 11, the ingress / feed out position of the film F is not limited to FIGS. As shown in FIG. 3, even when the film is considerably away from the film arrangement position in the close contact state in FIG. 3, it can be easily realized by a simple configuration.

As a result, the distance between the upper end of the film F and the chin rest can be significantly reduced, and the subject has the advantage that the escape portion of the chin can be made sufficiently large.

In this example, intensifying screens 7 and 9 of film F were used.
When the film F is moved into and out of the gap, the film F is moved by the driving force of the transfer roller 26, but only one of the films F is moved by the driving force of the transfer roller 26, and the other is formed by a conventionally known method. Good. For example, when entering, the film F is moved by the driving force of the transfer roller 26,
The film F may be spontaneously dropped by gravity, or the film F may be sent down by a roller provided below the back intensifying screen 9 after the film F is scraped off by another scraping means.

When entering, the transfer roller 26 and the film holding portion 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 inertia force of the film F, As in the present embodiment, the film F can be fed only until the lower end of the film F comes into contact with the stopper due to gravity.

[Effects of the Invention] As described above, the X-ray film contact device according to the present invention has a relatively simple configuration, and the X-ray film enters and leaves between intensifying screens, and is arranged at the photographing position when leaving and the position. Can be executed, the X-ray film is fed from the delivery position away from the imaging position to the intensifying screen, and the X-ray film is moved away after the intensifying screen is opened after the photographing is completed. The operation can be performed reliably and smoothly. Further, the film holding means for holding the X-ray film in pairs with the film transport roller is provided at least in part of the time of the operation of moving the X-ray film between the intensifying screens. The transfer roller and the film holding means are separated from each other for feeding the film, and the transfer roller and the film are held to remove the X-ray film during a part of the time of the withdrawal operation between the intensifying screens. If the means is separated from the means, the film F can be further fed into and out of the intensifying screen without any resistance, so that a series of operations can be executed more reliably and smoothly.

[Brief description of the drawings]

The drawings show an embodiment of the X-ray film bonding apparatus according to the present invention. FIG. 1 is a side view, FIG. 2, FIG. 3 is a side view of a main part in a displaced state, and FIG. FIG. 5 is a time chart showing the relationship between the rotation state of the roller and the state of each part, and FIG. 5 is a front view of a state where a part of the back intensifying screen support member is cut away. Reference numeral 1 is a film changer, 2 is a breast support member, 3 is a chin support 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 11 is a back intensifying screen. Paper support member, 13 is a shaft, 15, 26, 35, 36, 38 are rollers, 16 is a pivot, 17 is a drive lever, 20 is a first lever, 21
Is a second lever, 22, 31 are springs, 23 is a long hole, 24,
25 is a protruding shaft, 28 and 37 are levers, 29 is a bent portion, 32 is a film holding portion, 33 and 34 are protrusions, and 39 is a film detecting means.

Claims (2)

(57) [Claims] An X-ray film is provided between a front intensifying screen and a back intensifying screen, and the back intensifying screen is fixed. In an X-ray film contact apparatus for advancing to the front intensifying screen side and holding the X-ray film in close contact with the intensifying screen to perform X-ray photography, a film transport roller is attached to one end and the transport roller is attached. A lever mechanism provided with a film sandwiching structure for elastically sandwiching and holding the X-ray film by using one of the back intensifying sheets provided on both left and right sides of the back intensifying screen supporting member; At least the X-ray film penetrates between the intensifying screens during one cycle of operation in which the member advances to be in a close contact state and the back intensifying screen support member retreats and returns to the initial state after X-ray imaging. During operation time And / or transmitting a driving force to the transfer roller during a part of the time during the withdrawal operation between the intensifying screens and / or the operation of entering the X-ray film between the intensifying screens and / or An X-ray film adhesion apparatus, wherein the operation of moving out of the intensifying screen is performed. 2. The apparatus according to claim 1, wherein the lever mechanism has a film holding means for holding the X-ray film in a pair with the film transfer roller in the film holding structure. Means for separating the X-ray film from each other during at least a part of a time of an operation of moving the X-ray film between the intensifying screens in the one cycle operation. In order to separate the transfer roller and the film nipping means, and during a part of the time of the withdrawal operation between the intensifying screens, the transfer roller and the transfer roller in order to withdraw the X-ray film. The X according to claim 1, wherein the film holding means is separated from the film holding means.
Wire film adhesion device.