JPH0217013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a film carrier sheet suitable for use in developing dental x-ray film.

Prior Art FIG. 1 is a sectional view showing an example of a developing device in which a film carrier sheet according to the present invention is used.
In the figure, 1 is a developer container main body, and within the developer container main body 1, a developer tank 2, a fixer tank 3, and/or a cleaning (rinsing) tank 4 are arranged with partition walls 5 and 6 as boundaries. has been done. A pair of conveying rollers 7 and 8 for conveying the undeveloped film F are provided inside each of the liquid tanks 2 to 4 and in each part of the main body 1, and these conveying rollers are rotationally driven by a driving means (not shown). It is becoming more and more common. Reference numeral 9 denotes a side plate of the developer container main body 1, the side plate 9 has a hole 10, a gear shaft 11 passes through the hole 10, and a gear attached to the gear shaft is a gear attached to the shaft 12 of the roller 7. and further configured such that the gear engages with a gear mounted on the roller shaft 13 such that when the gear shaft 11 is rotated, the transport roller pair is rotated. It's summery. Note that a rotating shaft is provided on the outside of the side plate 9 along the side plate 9, and worms that engage with the gears attached to the rotating shaft 11 are provided at various locations on the rotating shaft. Each pair of conveyor rollers is configured to rotate simultaneously. Further, a curved notch groove 14 for configuring a conveyance path L for the film F is provided inside the side plate 9, and the end of the film F is inserted into the notch groove 14, and the film F is conveyed along this notched groove 14.
The film F is smoothly guided in some places on the conveyance path L,
In addition, a guide roller 15 and a guide plate 16 are provided for correcting the bending of the film, and these correct the bending that occurs in the film F when the direction of travel of the film F changes, so that the film can be cut. The film is smoothly conveyed along the groove 14, and the leading end of the film is smoothly inserted between the pair of conveyance rollers. Reference numeral 20 denotes a dark box used by being attached to the upper part of the developing container main body 1 as described above, and a recess 21 for storing the undeveloped film F is formed at the bottom of the dark box. An opening 22 is provided for transferring the developing film F to the developing container main body 1, and arm insertion openings 23 are provided on both sides.
A cylindrical cover, commonly referred to as an arm case, is provided on the outside. In the above-mentioned developing device, the undeveloped film F fed into the developing container main body 1 through the opening 22 of the recess 21 provided at the bottom of the dark box 20 is transferred to the pair of transport rollers 7 and 8 as described above. Therefore, it is transported and sequentially passes through a developer tank 2, a fixer tank 3, and/or a cleaning fluid tank 4, during which development is performed. As shown in Fig. 2, a normal cylindrical roller is used, so the roller surface contacts the entire surface of the film F, and the image pickup surface Fa of the film F is rubbed by the roller, causing the image to become blurred. There were problems such as parts of the image being missing. In order to solve these drawbacks, the applicant first configured each transport roller to engage with the film only at both end portions of the film F, as shown in FIG. imaging surface
We proposed a developing device configured so that it does not come into contact with Fa. This developing device can obtain a clearer image than the conventional developing device because there is no risk that the imaging surface of the film F will be damaged by contact with the transport roller. The size of the film is predetermined, and it can only develop large-format films, generally known as panoramic size (150 to 300 mm or 200 x 300 mm), and dental size (30 x 40 mm). It was not possible to develop small format film.

Purpose The present invention was made in view of the above-mentioned circumstances, and in particular, a film carrier sheet that is capable of developing a small-sized dental film using a developing machine that develops a large-sized panoramic film. It was made with the purpose of providing.

Structure In FIG. 4, numeral 40 is a surface view showing an embodiment of the film carrier sheet according to the present invention, and the film carrier sheet 40 is the same as the film F developed by the developing machine shown in FIG. It is made of a material having a width W and approximately the same flexibility as the film F, and as shown in the figure, a hole 41 is bored approximately at the center in the width direction. A dental film 5 is inserted into this hole 41 as shown in the figure.
0 is attached, and then the film carrier sheet 40 is conveyed through the developing machine as described above, and the dental film 50 is developed.
As described above, according to the present invention, the dental film 50 is attached to the panoramic film carrier sheet 40.
By attaching and transporting the dental film through the developing machine, the dental film can be developed using a panoramic developing machine.If the hole 41 is large enough to develop the dental film,
It may be circular, square, or any other shape.
Further, the dental film can be attached to the carrier sheet using cellophane tape, gummed tape 55, etc., but if an auxiliary tool 60 as shown in FIG. 5 is used, fingerprints etc. may be left on the dental film. It can be easily installed without any problems. That is, in FIG. 5, reference numeral 60 denotes an auxiliary tool for attaching the dental film 50 to the carrier sheet, and the auxiliary tool 60 has a hole 61 in the center that is large enough to receive the dental film 50; A plurality of pairs of protrusions 62 are provided at the periphery, and the dental film is configured to be held in a groove 63 between each pair of protrusions. That is, FIG. 6 is a cross-sectional view taken along the line -- in FIG. When pushed in from the direction of arrow A, the dental film 50 is flexible, so it is pushed into the groove 63 between the protrusions 62a and 62b, and is held between them. Although the illustrated example shows an example in which a pair of protrusions 62a and 62b are provided, this is just an example, and for example, the protrusions 62a may be configured continuously over the entire circumference. , any structure may be used as long as it can be easily held by pushing in from one side. Further, this auxiliary tool 60 is provided with a pair of holes 64 that penetrate in the radial direction, while the carrier sheet 40 is provided with a pair of protrusions 42 that extend toward the center of the hole 41. The protrusion 42 is configured to be inserted into the through hole 64 of the auxiliary tool. Therefore, the dental film 50 attached to the auxiliary device 60 as described above can be attached to the carrier sheet 60 by attaching the auxiliary device 60 to the carrier sheet 60 as described above, and thus During handling, the dental film can be handled using the auxiliary tool without touching the dental film directly, so there is no need to worry about staining the dental film with fingerprints or the like. Note that the projection 42 provided on the carrier sheet 40 is the fourth
It is better to extend the carrier sheet 40 in the width direction as shown at 42 in the figure.
As shown at 2', the carrier sheet can be conveyed more smoothly than when it is provided extending in the longitudinal direction (the conveyance direction of the carrier sheet).

Effects As is clear from the above explanation, according to the present invention, it is possible to effectively develop a small film for dental use using a developing machine that develops a large film for panoramic use, and the use of the developing machine Efficiency can be doubled.

[Brief explanation of drawings]

FIG. 1 is a side configuration diagram showing an example of a developing machine in which a film carrier sheet according to the present invention is used;
FIG. 2 is a diagram showing a conveyance roller in a conventional apparatus, FIG. 3 is a perspective view showing a conveyance roller of a developing machine used in the implementation of the present invention, and FIG. 4 is a diagram showing a film carrier sheet according to the present invention. FIG. 5 is a plan view showing an example of an auxiliary tool used in carrying out the present invention, and FIG.
FIG. 40...Film carrier seat, 41...
Hole, 42...protrusion, 50...dental film,
60... Auxiliary tool, 61... Hole, 62a, 62b...
...Pair of protrusions, 63...Groove, 64...Through hole.

Claims (1)

[Claims] 1. At least one pair of film carrier sheets having a developing solution tank, a fixing solution tank, and/or a cleaning solution tank, and through which a film carrier sheet of approximately panoramic size carrying a dental-sized undeveloped film is sequentially passed through each of the liquid tanks. Used in a developing device having a conveyance roller and configured such that each conveyance roller constituting the conveyance roller pair engages with the film carrier sheet only at both side edges of the film carrier sheet. In the film carrier sheet, the undeveloped film has a hole in the center for receiving the undeveloped film, a plurality of pairs of protrusions inside the peripheral part, and a hole penetrating the peripheral part in the radial direction. In a film carrier sheet, the film carrier sheet has a pair of symmetrical holes and is attached to an auxiliary tool that holds the undeveloped film between the pair of protrusions, and the auxiliary tool is attached to the film carrier sheet, The film carrier sheet has a hole for attaching the auxiliary tool at approximately the center in the width direction with respect to the transport direction of the film carrier sheet, and extends toward the center of the hole, and has a hole in the auxiliary tool. A film carrier sheet comprising a pair of symmetrical extension pieces that are inserted into the through holes.