JPH0314663Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a cassette tray for a Butsky photographic device in which film cassettes of various sizes can be set.

(b) Conventional technology In X-ray photography using the Butsky imaging device,
The center line of the X-ray beam emitted from the X-ray tube must be aligned with the center of the film cassette. To do this, the film cassette is inserted into the Butsky imaging device via a cassette tray that has been set in the center of the film cassette. will be installed.

As described above, a cassette tray is used in the Butsky photographing device, and as shown in the external plan view of Fig. 4, the conventional cassette tray rotates around the center 0 of a square tray 1 with an outer frame on all four sides. A main drive link 2 is rotatably attached to the back side of the drive link with the centers of motion aligned, a pair of auxiliary links 3 each connected with a pin at both ends thereof at positions equidistant from the center of rotation 0, and these auxiliary links 3. guide pins connected to the respective ends of the guide pins and slidably engaged with a pair of guide elongated holes 4 formed so that the extension of the longitudinal center line passes through the center 0 and is orthogonal to the outer frame. 5 and a pair of gripping pieces 6 fixed to these guide pins 5 and sliding on the surface of the tray 1. The guide pin 5 on the handle 7 side has a threaded portion that protrudes from the clamping piece 6, and a butterfly nut 8 is screwed into this threaded portion.By tightening the butterfly nut 8, the handle 7 The side clamping pieces 6 can be pressed and fixed onto the surface of the tray 1.

Therefore, by loosening the butterfly nut 8 and pulling it toward the handle 7, the guide pins 5 can be moved the same distance from the center 0, and the gap between the two gripping pieces 6 can be increased. . The film cassette 10 is placed between the pair of clamping pieces 6 with the gap widened in this manner, and the clamping pieces 6 and the cassette 10
Adjust the placement position of the cassettes 10 on the tray 1 so that the center marking lines engraved on each of the cassettes 10 coincide with each other, then tighten the butterfly nut 8 while pressing it toward the center 0, and place the cassettes 10 between the pair of clamps. Piece 6
The tray 1 is then clamped and centered both vertically and horizontally according to the drawing, and then fixed onto the tray 1.

By the way, since the tray 1 is normally required to be able to set cassettes 10 of various sizes,
In order to set the cassette 10 with the maximum longitudinal dimension C (for example, 17"), this conventional tray 1 is
Now, if we take the space necessary for the holding mechanism,
The length of one side was C+2D, and it was considered unavoidable that the size would be quite large. However, this necessitates making the Butsky imaging device larger, which causes various inconveniences, especially in devices such as X-ray tomography devices that require the Butsky device to move. Ta.

(C) Purpose This invention aims to solve the above-mentioned problems of the conventional Butski photography device, by creating a Butuki photography device that can accommodate film cassettes of various sizes, while keeping the size as small as possible. An object of the present invention is to provide a cassette tray for a Butsky photographing device that can be made smaller than before.

(D) Structure The cassette tray for a Butsky imaging device according to this invention has an outer frame on all four sides, and a pair of guide elongated holes are bored parallel to the outer frame and along two center lines passing through the center. a parallel movement mechanism for moving at least one pair of the cassette clamping pieces in opposite directions with one centerline as an axis of symmetry; and a cassette tray for a Butsky imaging device, comprising a guide pin that is slidably inserted into the guide slot and engages the cassette holding piece with the tray body, wherein the outer frame is provided on the back side of the tray body. Further, the guide slots are formed in the tray main body by cutting out each outer end thereof, and a rectangular guide block having a long side along the guide slot is connected to the guide pin, and these are connected to the guide slot. The device is characterized in that the at least one pair of cassette clamping pieces is moved outwardly along the guide elongated hole via the parallel moving machine, and the guide pin is slidably engaged with the guide length. The pair of gripping pieces removed from the holes are respectively allowed to overhang from the tray body while regulating their movement direction by engagement with the guide block connected to the guide pin and the guide slot, thereby forming the tray. It is designed to be able to hold a cassette that is larger than the main body while centering it.

(E) Embodiment FIG. 1 is an external plan view of a cassette tray for a Butsky imaging device, which is an embodiment of this invention.
FIG. 2 is a side cross-sectional view of the - section viewed in the direction of the arrow.

The tray main body 11 of this device has an outer frame 12 provided around the four peripheries on the lower side in order to give it rigidity, and a main pin 13 is fixed concentrically to the center 0 on the back surface of the outer frame 12. A lever-shaped driven link 14 is rotatably fixed, and a pair of auxiliary links 15 are pin-connected to both ends thereof at positions equidistant from the axis 0, respectively.

Guide pins 16 are provided at the ends of these auxiliary links 15.
are fixed respectively, and each of these guide pins 16 is
The extension of the center line in the longitudinal direction is perpendicular to the outer frame 12 on the handle 7 side, and the guide holes 17 are inserted into a pair of guide slots 17 cut out at the outer ends of the tray body 11 so as to pass through the center 0. A rectangular guide block 1 having a long side along a long hole 17 and movably engaged with it.
8, respectively. Guide block 18
has a convex cross-sectional shape perpendicular to its longitudinal direction as shown in FIG. are connected to each other so that they can slide along the surface of the tray body 11.

A disk-shaped drive link 20 is rotatably engaged with the lower end of the main pin 13, and a pair of auxiliary links are connected to the drive link 20 at positions symmetrical to the axis of the main pin 13. 21 are connected by pins. Guide pins 16' are fixed to the ends of these auxiliary links 21, and each of these guide pins 16' has a longitudinal center line extending parallel to the outer frame on the handle 7 side, and a center 0. The same guide blocks 18 as described above are connected to each other and slidably engage with a pair of guide elongated holes 17 cut out at the outer ends of the tray body 11 so as to pass through the tray body 11. Holding pieces (hereinafter abbreviated as holding pieces) 19 of the cassettes are connected to each other so that they can also slide along the surface of the tray body 11.

The disc-shaped active link 20 is provided with a restraining means for restraining the rotation of only one side thereof (in this embodiment, counterclockwise when viewed from above). This restraining means has a ratchet wheel 22 formed on the outer periphery of the drive link 20 and a pawl portion that engages with the ratchet wheel 22 at the tip, and the pawl portion engages with the ratchet wheel 22 counterclockwise when viewed from above. The tray body 1 is urged to rotate in the direction
1 and a locking lever 23 attached to the lever 1.

One end of a tension coil spring 24 is secured to the guide pin 16 to which the clamping piece 19 on the side of the handle 7 is connected, and the other end is secured to a pin 25 implanted in the driving link 20. By rotating the link 20 in a clockwise direction when viewed from above, the tension coil spring 24 is stretched and its elastic force is increased. Note that receiving plates 26 having the same thickness as the clamping pieces 19 are attached to the four corners of the tray body 11 to the extent that they do not interfere with the movement of each pair of clamping pieces 19, so that the mounting surface of the cassette 10 forms one plane. It's like this.

Now, a cassette 10 of a size that fits within the area surrounded by the four clamping pieces 19 is placed on the tray main body 11 of this device configured as described above, with the cassette 10 of a size that fits within the area surrounded by the four clamping pieces 19, and the cassette 10 is placed on the main drive link 20 for assistance. Link 2
1 (hereinafter, this pair will be referred to as the pair in the X-axis direction, and the other pair of clamping pieces 19 will be referred to as the pair in the Y-axis direction) with both hands. When pressed in the direction, the driving link 20 is rotated clockwise as viewed from above while the claws of the locking lever 23 engage with the teeth of the ratchet wheel 22 one by one.
9 are brought closer to the center 0 by a distance corresponding to the rotation angle of the driving link 20, and on the other hand, the tension coil spring 24 is stretched by the rotation of the driving link 20 and increases its elastic force, so that the tension coil spring 24 The guide pin 16 and the guide block 18, whose ends 24 are locked, quickly approach the center 0 along the guide elongated hole 17 more than in proportion to the rotation angle of the drive link 20. Due to the accompanying movement of the auxiliary link 15, the driven lever 14 is also rotated clockwise by a slightly greater angle than the rotation angle of the main lever 20, so that the pair of clamping pieces 19 in the Y-axis direction are centered by the same distance. 0, and the cassette 10 is
Hold while centering in the Y-axis direction. Subsequently, when the pair of clamping pieces 19 in the X-axis direction are pushed toward the center 0 with both hands, the clamping pieces 19 in the X-axis direction will hold the cassette 10 in the X-axis direction in the same way as the clamping pieces 19 in the Y-axis direction Hold while centering. In this case, since the clamping pieces 19 in the Y-axis direction are all in contact with the cassette 10, the tension coil spring 24 is stretched as the driving link 20 rotates, and the elastic force increases. In view of this, it is necessary to increase the pressing force against the clamping piece 19 in the X-axis direction against the increase in counterclockwise torque, that is, rotational resistance. When the cassette 10 is centered and fixed on the tray body 11 in this way, a counterclockwise torque is applied to the driving link 20 due to the increased elastic force of the tension coil spring 24. However, this torque is received by the claw portion of the locking lever 23 that engages with the ratchet wheel 22, and the fixed state of the cassette 10 is maintained as it is.

To release this fixed state, the release handle 27 provided inside the handle 7 is pulled towards the handle 7 side, and the claw portion of the restraining lever 23 and the ratchet wheel 22 are disengaged.

In this way, the driving link 20 is rotated counterclockwise by the above-mentioned counterclockwise torque,
Accordingly, the pair of clamping pieces 19 in the X-axis direction are both moved away from the center 0 by the same distance, while the Y-axis
A pair of clamping pieces 19 in the axial direction are tension coil springs 2.
4 is restored to its initial state, so it can be easily pulled out to the outside.

Now, the operation of fixing the largest size cassette 10' while centering it on this device, in which each pair of clamping pieces 19 are pulled out outwardly on the tray body 11, will be described.

In this case, the size of the tray body 11 is A ₀ ×A ₀
= 14″ x 14″, and cassette 1 to be fixed
0' is a half-cut sheet whose size is C ₀ ×C ₀ =17″×14″.

A pair of clamping pieces 19 in the Y-axis direction are attached to the tray body 1.
No outer frame 12 is provided on the front side of 1,
Since the guide slots 17 are all cut out at their outer ends, they can be pulled out by hand to the outside at the same time.
If the holding pieces 19 are slightly protruded from the position shown in the figure, a sufficient gap is provided between the holding pieces 19 to accommodate the cassette 10' in the Y-axis direction.

On the other hand, the pair of clamping pieces 19 in the Y-axis direction are both D ₀ from each end surface of the tray body 11, that is, 1
It must be pulled out outward so that it protrudes slightly more than 1/2". When pulling out this, it is necessary to allow rotation of the driving link 20 in the counterclockwise direction. While pulling the release handle 27 toward the handle 7 side with one hand, one of the clamping pieces 19 may be pulled out with the other hand.

When pulling out in this way, the guide slot 17 is notched at the outer end, and an opening is provided in a part of the outer frame 12 so as not to hinder the movement of the auxiliary link 21. Of course, the outer frame 12 is Since it is not on the side, the ends of the guide pin 16' and the auxiliary link 21 can be made to protrude from the tray body 11. However, at this time, it is necessary to restrict the moving direction of the guide pin 16' so that it is pulled out along the X-axis direction, and the guide block 18 is designed to fulfill this role. That is guide block 1
8 has its longitudinal length matched with the clamping piece 19, and even when the clamping piece 19 is pulled out in the X-axis direction as shown in the figure, a sufficient portion of the clamping piece 19 that fits into the guide slot 17 remains. In this way, the pair of clamping pieces 19 in the X-axis direction are both attached to the tray body 1.
Since the cassette 10' can be left slightly larger than 11/2'', the half-cut size cassette 10' can be placed in the enlarged area surrounded by the pair of clamping pieces 19 in the Y-axis direction.
By placing and performing the same operation as above,
Each pair of clamping pieces 19 are brought close to each other by the same distance toward the center 0, and the cassette 10' is clamped while being centered in the X-axis direction and the Y-axis direction, and fixed on the tray body 11. As described above, the fixed state can be maintained by the engagement between the ratchet wheel 22 and the claw portion of the locking lever 23.

Although the explanation is omitted, the cassettes 10' of large size (14'' x 14'') and smaller sizes are fixed to this device as described above without allowing each pair of clamping pieces 19 to protrude from the tray body 11. can do.

Note that the size between the outer surfaces of the outer frame 12 is A ₀ , that is, 14'' as shown in Fig. 2, so the size of the inset part of the Butsky imaging device can be approximately the same size as the conventional one, but it is not necessary to make it particularly large. do not.
In addition, the minimum space required for the Butkey unit of the Butkey photography device equipped with the A ₀ = 14″ cassette tray to move when performing divided photography using a large-sized cassette, that is, the minimum space required for both vertical and horizontal directions is 14″ + (14″ x
This device can be installed as long as there is a space of 2 x 1/4) = 21''.

(f) Effects The cassette tray for a Butsky imaging device according to this invention has the following effects.

For example, cassettes of various sizes can be stored in trays, from large half-cut cassettes (17" For example, if the main body is 14″ x 14″
Compared to the size of 17" x 17", it can be set even though the size is suppressed, so the Butsky photographing device to which it is attached can be made smaller, and it is especially suitable for Butsky photography. In an X-ray tomography apparatus that requires movement of the apparatus, the movement weight (inertial resistance) can be reduced and imaging speed can be increased.

[Brief explanation of the drawing]

Fig. 1 is an external plan view of a cassette tray for a Butsky imaging device, which is an embodiment of this invention, and Fig. 2 is a side sectional view of the - section viewed in the direction of the arrow.
FIG. 3 is a sectional view taken perpendicular to the longitudinal direction of the guide block, and FIG. 4 is an external plan view showing an example of a conventional device. 7... Handle, 10, 10'... Film cassette, 11... Tray body, 12... Outer frame, 13...
... Main pin, 14 ... Driven link, 15 ... Auxiliary link, 16, 16' ... Guide pin, 17 ... Guide slot, 18 ... Guide block, 19 ... Cassette clamping piece, 20 ... Drive link , 21... Auxiliary link, 22... Ratchet wheel, 23... Retention lever, 22,
23... restraining means, 24... tension coil spring.

Claims (1)

[Scope of utility model registration request] A tray body having an outer frame on four peripheries, a pair of guide elongated holes being bored each along two center lines that are parallel to the outer frame and passing through the center, and facing each of the two center lines. each pair of cassette clamping pieces disposed, a parallel movement mechanism for moving at least one pair of the cassette clamping pieces in opposite directions about one center line as an axis of symmetry, and a parallel movement mechanism slidably inserted into the guide elongated hole; In the cassette tray for a Butsky imaging device, which is provided with a guide pin for engaging the cassette holding piece with the tray body, the outer frame is provided on the back side of the tray body, and the guide elongated holes are provided in the tray body at respective outer ends. A button key characterized in that the guide pin is cut out and bored, and a rectangular guide block having a long side along the guide slot is connected to the guide pin, and these are slidably engaged with the guide slot. Cassette tray for photographic equipment.