JPH0235287Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention is used in a panoramic X-ray device that takes an expanded photograph of a dentition, for example, in which a film cassette is fixed in advance and is attached to the cassette attachment part of the X-ray device body. This invention relates to a film cassette mounting device.

<Background of the prior art and its problems> An example of a conventional, well-known panoramic X-ray device for photographing the development of a dentition is shown in Figure 1, in which a film cassette (not shown) is used as an X-ray device. Support arm 4 extending laterally of the main body
The X-ray head 44 is attached to the cassette attachment part 42 attached to the tip of the X-ray apparatus, and the patient places his head on the head holders 43, 43, and rotates the X-ray head 44 suspended from the side of the X-ray apparatus body to take panoramic images. is being carried out.

There are generally two types of film used during this imaging process, vertical and horizontal, and in order to use these two types of film properly, the cassette mounting part 42 of the X-ray device must be replaced each time. However, it was cumbersome and unsuitable for quick response. Furthermore, depending on the shooting, the film surface may be used as a full sheet or as half sheets on the left and right sides, but the conventional cassette mounting section 42 does not allow accurate shooting range of the set film cassette. It is difficult to specify
Some of them are equipped with positioning scales, but they are cumbersome to use and are not sufficient, so in reality, the rough range is determined empirically. As a result, the photographed images were tilted or partially vignetted, making them difficult to see, and there was also a lot of waste when using the film.

<Purpose of the invention> The present invention was devised in view of the conventional problems as described above, and its purpose is to be able to quickly adapt to both vertical film cassettes and horizontal film cassettes. Another object of the present invention is to provide a film cassette mounting device which allows extremely easy positioning of the photographing range on the film surface.

<Summary of the invention> In order to achieve the above object, the present invention has a rectangular bottom plate and a top plate attached with a slight gap between the bottom plate and one side of the film cassette on the top plate. four link members are assembled in a rhombus shape between the gaps of the mount, and both acute-angled pivot ends thereof extend to and face two diagonal corners of the mount. An elastic spring is tensioned between both link members, and when both obtuse-angled shafting ends are opened and closed, a link mechanism is housed in which the acute-angled shafting ends are displaced, and the acute-angled shafting ends of the link mechanism are moved. The clamps are installed vertically at two corners of the top plate of the mount and have vertical or horizontal locking parts that clamp the two corners of both vertical or horizontal film cassettes, and are fixed by facing each other. On the other hand, a U-shaped handle for clamping is attached to one side of the same plane of the pedestal, and a U-shaped handle for clamping is attached between two parallel shafts arranged orthogonally to one side of the pedestal within the handle. First and second handles having different sliding strokes are fitted from the one side side in parallel with the grip portion of the handle, and on the sides of both handles there is a mechanism for advancing the handle to the grip portion of the handle. A locking mechanism for locking and unlatching the state is installed, and a wire is stretched between the second handle on the handle grip side and the obtuse-angled shafted end of the link mechanism via a pulley placed between the gaps in the frame. Establishment and above No. 1
Alternatively, by moving the second handle forward toward the handle grip side, both clamps are displaced via the wire and link mechanism to clamp the film cassette, and at the same time, a positioning groove is formed on the back of the mount to position the photographing range of the film surface. A positioning plate engraved with is installed to facilitate positioning of the photographing range.

<Example> Next, an example of the present invention will be explained in detail with reference to FIGS. 2 to 5.

1 is a stand, and the bottom plate 2 has a rectangular shape with raised edges.
and a top plate 4 which is placed on receiving plates 3, 3, 3 provided at intermediate positions inside the rising portions 2a of the bottom plate 2 and has a slight gap S between it and the bottom plate 2. A link mechanism L in which four link members 5... are assembled in a diamond shape between the gaps S of this frame 1.
is stored. The two acute-angled shaft ends 5a, 5a of these link members 5 extend to the two diagonal corners of the pedestal 1, and between the opposing link members 5, there is a direction in which the diamond shape is always closed. An elastic spring 6 is tensioned. and,
Also, the obtuse-angled shaft ends 5b, 5 of the link member 5...
In b, rollers 8, 8 are attached to the lower ends of the shaft pins 7, 7, and these rollers 8, 8 serve as guides for a guide plate 9 provided on the bottom plate 2 so as to be orthogonal to the diagonal direction of the link mechanism L at the center. It is slidably mounted in the groove 10. That is, the obtuse-angled shaft-attached ends 5b, 5b can be opened and closed along the guide groove 10, and along with this opening and closing,
The two acute-angled shaft ends 5a, 5a are displaced at the two corners of the pedestal 1.

In addition, the acute-angled double-shaft end 5 of the link mechanism L
Clamps 11, 11, which are erected at two corners of the upper surface plate 4 of the pedestal 1, are fixed to a and 5a in opposition to each other. The clamps 11, 1 are generally W-shaped members when viewed from above, and in the case of the one at the upper left corner in the figure, a vertical locking portion 11a that clamps a corner of a vertical film cassette is on the right side. Horizontal locking part 1 that clamps the corner of the horizontal film cassette on the lower side
1b, and in the lower right corner of the figure, a vertical locking portion 11a similar to the above is provided on the left side.
However, a horizontal locking portion 11b similar to the above is provided on the upper side.

A U-shaped handle 12 for clamping is attached to one side of the pedestal 1 on the left side in the drawing, which is flush with the pedestal 1. Inside this handle 12 is the above-mentioned mount 1.
A handle attachment bottom plate 2', which will be described later, is connected to and extended from the bottom plate 2 of the handle. In the case of this bottom plate 2' as well, the periphery is raised leaving one side of the pedestal 1, and the top plate 4 of the pedestal 1 is extended to the receiving plate 3 provided at an intermediate position inside the rising portion 2'a. It is set and covered. Relatively large windows 13 and 14 for operating the handle are penetrated approximately at the center of the top plate 4 and the bottom plate 2'. In the figure sandwiching the window 14 of the bottom plate 2', there are two parallel shafts 15 perpendicular to one side of the pedestal 1,
15 is attached to the bottom plate 2' by the left and right fasteners 16...
It is placed slightly higher up. This parallel axis 1
5 and 15, the above-mentioned handle 1 is attached from one side of the pedestal 1.
The first handle 1 is parallel to the second grip part 12a.
7. Stroke adjustment cylindrical collars 18, 18 and a second handle 19 are slidably fitted.
In the figure, the first handle 117 partially protrudes upward, and a lock pin 20 is implanted in this part so that it can be engaged with and disengaged from a lock mechanism 21 installed on the side of the handle 17. 2 handle 1
9 is partially projected downward in the figure, and a lock pin 20 is similarly implanted in this portion, so that it can be engaged with and disengaged from a lock mechanism 21 installed on the side of the handle 19. That is, this lock mechanism 21
As shown in the figure, a locking plate 22 which is spring-loaded counterclockwise in the figure is extended and has an inclined surface 23 inclined toward one side edge formed at its tip. There is a hook groove 24 cut in the width direction of the lock plate 22 on the side edge of the descending proximal end, and a hook groove 24 is provided at the inner width direction of the lock plate 22 and is inclined from the tip side in the length direction of the lock plate 22. A lock release piece 25 is formed. Therefore, the above handle 1
When the handles 7 and 19 are moved forward toward the grip portion 12a of the handle 12, the lock pin 20 and the inclined surface 2 of the lock plate 22
3, the lock plate 22 is pushed slightly clockwise in the figure against the elasticity of the biasing spring, and as the lock pin 20 advances further, it enters the hook groove 24 and is locked. In this state, handles 17, 1
When the handle 9 is moved forward a little, the lock pin 20 enters under the lock release piece 25, and the lock is released.If the handles 17 and 19 are moved back in this state, the lock is completely released. In this example, in the first handle 17, the locking mechanism 21 is located close to each other, so that the sliding stroke of this handle 17 is small, and in the second handle 19, the locking mechanism 21 is located relatively far apart. The sliding stroke of this handle 19 is therefore quite large.
Note that the stroke of the second handle 19 can also be adjusted by adjusting the lengths of the cylindrical collars 18, 18.

Between this second handle 19 and the obtuse-angled shaft ends 5b, 5b of the link mechanism L, there is a top plate 4.
Pulleys 26, 26, 26 installed appropriately on the back side of
Wires 27, 27 are stretched across.
Therefore, when the first handle 17 is moved forward, the link mechanism L opens slightly against the spring 6, and when the second handle 19 is moved forward, the link mechanism L opens relatively widely. Of course,
Correspondingly, the clamps 11, 11 located at the two corners of the pedestal 1 move toward the center so as to attract each other.

Further, a positioning plate 28 that extends long in the direction of the handle 12 is installed on the back surface of the pedestal 1, and V-shaped positioning grooves 29 are provided at the center in the width direction of this positioning plate 28, and near the left and right edges. 30, 30' are engraved. This positioning groove 29, 30, 3
When using the film cassette mounting device of this embodiment, for example, when a support device 31 for an X-ray device as shown in FIG. A biased locking pin 33 is provided, and this pin 3
This is a groove for easily positioning the photographing range of the film surface, for example, the entire sheet or half of the left and right sheets, by engaging with the groove 3. Note that reference numerals 34 and 34 are support frame plates provided above and below this support device.

To use the film cassette mounting apparatus of this embodiment, first, a prescribed film cassette is mounted on the apparatus. When installing this film cassette, if it is vertical, use clamp 1.
The operator who holds the handle 12 places the two corners of the cassette between the vertical locking parts 11a and 11a of the handles 1 and 11, puts his fingers into the windows 13 and 14, and presses the first handle 17.
The handle is moved forward toward the grip portion 12a of the handle 12, and the lock pin 20 of the handle 17 is engaged with the lock mechanism 21. This small sliding stroke of the handle 17 causes the link mechanism L to open slightly via the wires 27, 27, and the clamps 11, 11 move to a position indicated by the chain line A in the middle of the inner side in FIG. 2, thereby fixing the film cassette. In this state, try the first
When the handle 17 is moved forward a little further, the lock mechanism 21 is unlocked.

In the case of a horizontal film cassette, the two corners of the cassette are positioned between the horizontal locking parts 11b, 11b of the clamps 11, 11, and the operator holding the handle 12 finger on window 1
3, 14, and take the second handle 19 with the handle 12.
The lock pin 20 of the handle 19 is engaged with the lock mechanism 21. This large sliding stroke of the handle 19 causes the link mechanism L to open wide via the wires 27, 27, and the clamps 11, 11 move to the innermost position B shown in chain lines in FIG. 2, thereby fixing the film cassette. In this state, press the second handle 1 again.
When the lock mechanism 9 is moved forward a little further, the lock mechanism 21 is unlocked.

In this way, the film cassette is placed on the mount 1 in advance.
Once set, the film cassette mounting device can be used by supporting the film cassette mounting device together with the supporting device 31 of the X-ray device as shown in FIG. 5 described above. At this time, the positioning plate 28 on the back of the pedestal 1 and the locking pin 33
This makes it easy to position the photographic range on the film surface.

<Effects of the Invention> According to the present invention, as is clear from the above description, it is possible to quickly respond to both vertical film cassettes and horizontal film cassettes with a single touch by operating the first or second handle. In addition, by simply fitting it into the X-ray support device,
It is possible to obtain an excellent film cassette mounting device that can extremely easily position the photographing range on the film surface using the positioning plate on the rear surface of the mount.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional general panoramic X-ray device, and Figs. 2 to 5 show an embodiment of the film cassette mounting device according to the present invention. FIG. 3 is a plan view of the entire device with most of the face plate omitted; FIG. 3 is a longitudinal cross-sectional side view of the entire device; FIG.
The figure is a partially longitudinal side view showing the film cassette mounting device in a supported state. 1... Frame, 2... Bottom plate, 4... Top plate, L
... Link mechanism, 5 ... Link member, 5a, 5a
...Shaft end with acute angle, 5b, 5b...Both shaft end with obtuse angle, 6...Elastic spring, 11, 11...Clamp, 11a, 11a...Vertical locking part, 11
b, 11b...Horizontal locking part, 12...Handle, 12
a... Grip portion, 15, 15... Parallel shaft, 17... First handle, 19... Second handle, 21...
...Lock mechanism, 26...Pulley, 27...Wire, 28...Positioning plate, 29, 30, 30'...
...Positioning groove.

Claims (1)

[Claims for Utility Model Registration] (1) A rectangular bottom plate and a top plate attached with a slight gap between the bottom plate form a pedestal on which one side of the film cassette is attached. Four link members are assembled in a diamond shape between the gaps of the pedestal, and both of their acute-angled shaft ends extend to two diagonal corners of the pedestal, and between the opposing link members. An elastic spring is tensioned, and when both obtuse-angled pivot ends are opened and closed, the acute-angle pivot ends accommodate a link mechanism that displaces the position. Both clamps, which are erected at two corners on the top plate and have a vertical locking part and a horizontal locking part that clamp the two corners of both vertical or horizontal film cassettes, are opposed and fixed, while the above-mentioned mount is fixed. A U-shaped handle for clamping is attached to one side of the same plane, and two parallel shafts arranged perpendicularly to one side of the mount in the handle have different sliding strokes. The first and second handles are fitted from the one side side in parallel with the grip portion of the handle, and the handles are attached to and disengaged from the sides of the handle in an advanced state to the grip portion of the handle. A locking mechanism is installed, and a wire is stretched between the second handle on the handle grip side and the obtuse-angled shafting end of the link mechanism via a pulley arranged between the gaps in the frame. A film cassette mounting device characterized in that, when the first or second handle is moved forward toward the handle grip side, both clamps are displaced through a wire and a link mechanism to clamp the film cassette. (2) The film cassette mounting device according to claim 1, wherein a positioning plate having a positioning groove for positioning the photographing range of the film surface is installed on the back surface of the mount.