JP2000089432A - Detecting mechanism for photosensitive material of photosensitive material processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to exactly detect a photosensitive material. SOLUTION: This mechanism 30 has a first outlet part transporting roller 9c formed with a hollow groove 24 facing a peripheral surface direction on its outer peripheral part, a ring member 16 engaging with the hollow groove 24 of the first outlet part transporting roller 9c, a second outlet part transporting roller 9d formed with the hollow groove 25 facing the peripheral surface direction on its outer peripheral part and an optical sensor 17 having a light projecting part and a light receiving part. The photosensitive material F is detected by detecting the displacement in the outer peripheral part of the ring member accompanying the turning of the ring member 16 by means of the optical sensor 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive material processing apparatus, and more particularly to a photosensitive material detecting mechanism in a photosensitive material processing apparatus.

[0002]

2. Description of the Related Art Such a photosensitive material processing apparatus includes a developing tank for storing a developing solution, a fixing tank for storing a fixing solution, a washing tank for storing washing water, and a drying section having a drying air generating means. Is provided. Then, the exposed photosensitive material is sequentially immersed in a developing solution, a fixing solution, and washing water, so that the photosensitive material is subjected to a developing process, a fixing process, and a washing process. Configuration.

In such a photosensitive material processing apparatus,
A photosensitive material detection mechanism for detecting the photosensitive material passing therethrough is additionally provided. Such a photosensitive material detection mechanism includes an optical sensor that irradiates light to the photosensitive material and detects the photosensitive material by reflected light or transmitted light, and a contact that contacts the photosensitive material. A mechanical sensor or the like for detecting a photosensitive material is used.

[0004]

In such a photosensitive material detecting mechanism, when an optical sensor is used, unless the optical sensor is disposed in a position very close to the photosensitive material, the influence of external light can be reduced. May cause a malfunction. However, when the optical sensor is disposed near the photosensitive material transport path, the wiring extending from the optical sensor interferes with the attachment / detachment of the transport roller that transports the photosensitive material.

In both cases of using an optical sensor and a mechanical sensor, when the transport path of the photosensitive material is slightly changed due to the bending of the photosensitive material, the photosensitive material can be accurately removed. Not detectable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a photosensitive material detection mechanism in a photosensitive material processing apparatus capable of accurately detecting a photosensitive material.

[0007]

According to a first aspect of the present invention, there is provided a photosensitive material detecting mechanism in a photosensitive material processing apparatus for transporting and processing a photosensitive material by a plurality of transport rollers, wherein a peripheral portion is provided on an outer peripheral portion thereof. A transport roller having a concave groove facing in the surface direction and the photosensitive material transported by the transport roller are brought into contact with each other, whereby the transport roller rotates about the axis of the transport roller, and is engaged with the concave groove. A ring member, and a detecting means for detecting a photosensitive material by detecting a displacement of an outer peripheral portion of the ring member accompanying rotation of the ring member.

According to a second aspect of the present invention, in the first aspect of the present invention, the outer peripheral portion of the ring member is a thin plate-shaped convex portion extending to a position separated from the axis of the transport roller by a predetermined distance. And the detecting means detects the photosensitive material by detecting the displacement of the projection.

According to a third aspect of the present invention, there is provided a photosensitive material detecting mechanism in a photosensitive material processing apparatus for transporting and processing a photosensitive material by a plurality of transport rollers, wherein a concave groove facing the peripheral surface is provided on an outer peripheral portion thereof. A first conveying roller having a groove formed therein, a concave groove facing the circumferential surface formed in an outer peripheral portion thereof, a second conveying roller rotating in contact with the first conveying roller, and the first and second conveying rollers. By contacting the photosensitive material nipped and transported by the two transport rollers, the shaft center of the first transport roller is moved so that the outer peripheral portion of the first transport roller is retracted from a position where it enters the concave groove of the second roller. Pivoting around the center,
A ring member engaged with the concave groove of the first transport roller; and a detecting means for detecting a photosensitive material by detecting displacement of an outer peripheral portion of the ring member accompanying rotation of the ring member. It is characterized by.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the detecting means includes a light projecting portion disposed so as to sandwich an outer peripheral portion of the ring member. And an optical sensor having a light receiving section.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

First, the configuration of a photosensitive material processing apparatus to which the present invention is applied will be described. FIG. 1 is a schematic side view of a photosensitive material processing apparatus to which the present invention is applied, and FIG. 2 is an enlarged view showing a main part thereof.

This photosensitive material processing apparatus includes a feed tray 1, a developing tank 2 for storing a developing solution, a fixing tank 3 for storing a fixing solution, and a washing tank 4 for storing washing water. And a drying unit 6.

In the developing tank 2 and the fixing tank 3, a processing liquid circulating mechanism for circulating a developing liquid or a fixing liquid as a processing liquid, thereby filtering the developing liquid or the fixing liquid and controlling the temperature is provided. Have been. In the drying unit 6, a fan 11 for generating warm air and a heater (not shown), and the hot air generated by the fan 11 and the heater are guided to both surfaces of the photosensitive material. A guide member 12 for guiding the photosensitive material is provided. In the vicinity of the outlet 18 of the drying unit 6, a photosensitive material detection mechanism 30 according to the present invention is provided.

In the developing tank 2, the fixing tank 3, the washing tank 4 and the drying section 6, a plurality of transport rollers 9 which rotate in synchronization with each other by driving a motor (not shown) are provided. These transport rollers 9 include a developing tank 2, a fixing tank 3, and a washing tank 4.
Are rotatably supported by a rack 13 provided in the inside or a rack 14 provided in the drying unit 6. Also,
A plurality of guide members 10 are attached to a rack 13 provided in each of the developing tank 2, the fixing tank 3, and the washing tank 4. For this reason, the photosensitive material is guided by the guide member 10 and the guide member 12 under the driving of the transport roller 9, and
In FIG. 1, the photosensitive material is conveyed along a conveying path indicated by a chain line.

A crossover section between the developing tank 2 and the fixing tank 3, a crossover section between the fixing tank 3 and the washing tank 4 and a crossover section between the washing tank 4 and the drying section 6 include: Each of them is provided with a treatment liquid throttle mechanism 20. A processing liquid cover 7 serving as a guide member for the photosensitive material is provided before and after the processing liquid squeezing mechanism 20. further,
A processing liquid cover 8 is provided near the liquid surface of the developing solution, the fixing solution or the washing water.

The basic processing section 5 composed of the developing tank 2, the fixing tank 3 and the washing tank 4 described above, and the drying section 6
Each is manufactured by injection molding a resin having chemical resistance. The basic processing unit 5 and the drying unit 6 are positioned with respect to each other by the fixing member 15 and a plurality of screws.
Connected.

In the photosensitive material processing apparatus configured as described above, the photosensitive material inserted from the feed tray 1 is transported by a plurality of transport rollers 9 rotating in synchronization with each other, so that the developing tank 2, After a developing process, a fixing process, and a rinsing process are performed in the fixing tank 3 and the rinsing tank 4, the drying process is performed in the drying unit 6, and the discharged product is discharged.
At this time, the developing solution, the fixing solution, or the washing water is squeezed out of the photosensitive material by the above-described processing solution squeezing mechanism 20, and the developing solution, the fixing solution, or the washing water is prevented from being carried into the next step.

Next, the structure of the photosensitive material detecting device 30 according to the present invention will be described. FIG. 3 is a plan view showing a main part of the photosensitive material detection mechanism 30 according to the present invention.
FIG. 2 is a side view of the vicinity of a photosensitive material detection mechanism 30 according to the present invention.

The photosensitive material detecting mechanism 30 is disposed near the outlet 18 in the drying section 6 of the photosensitive material processing apparatus. A first outlet conveying roller 9c, a resin ring member 16 that engages with the concave groove 24 of the first outlet conveying roller 9c, and a concave groove 25 facing the circumferential direction are formed on the outer peripheral portion thereof. The second exit part transport roller 9d and the light emitting part 17
a and an optical sensor 17 having a light receiving section 17b.

The outer peripheral portion of the ring member 16 has a thin plate-shaped convex portion 21 extending to a position separated by a first distance from the axis of the first outlet conveying roller 9c, and a first outlet conveying roller 9c. And a thin plate-shaped recess 22 extending to a position separated from the axis by a distance smaller than the first distance. The ring member 16 is rotatable around the axis of the first transport roller 16 in the concave groove 24 of the first outlet transport roller 9c.

That is, as shown in FIG. 4, the ring member 16 has a position where the side surface of the convex portion 21 is in contact with the bottom of the concave groove 25 formed in the second outlet conveying roller 9d. As shown in FIG. 3, the recess 22 is rotatable between a position where the side surface of the recess 22 contacts the guide member 12. The ring member 16 is configured to return to the position shown in FIG. 4 by its own weight even if it rotates to the position shown in FIG. At this time, a metal weight 23 may be attached to the ring member 16 to ensure this return operation.

As shown in FIG. 3, the optical sensor 17 has a light projecting portion 17a and a light receiving portion 17b arranged so as to sandwich the outer periphery of the ring member 16. Then, the light emitted from the light projecting portion 17a toward the light receiving portion 17b is blocked by the thin plate-shaped convex portion 21 on the outer peripheral portion of the ring member 16, thereby detecting the photosensitive material. .

That is, due to its own weight, the ring member 16 exerts a force to rotate in the clockwise direction in FIG. 4 around the axis of the first outlet conveying roller 9c. For this reason, in a normal state, the ring member 16 is located at a position where the side surface of the convex portion 21 abuts the bottom of the concave groove 25 formed in the second exit portion conveying roller 9d as shown in FIG. Are located. In this state, the light emitted from the light projecting portion 17a of the optical sensor 17 toward the light receiving portion 17b is not blocked.

In this state, as shown in FIG. 6, when the photosensitive material F is conveyed while being sandwiched between the first outlet conveying roller 9c and the second outlet conveying roller 9d, as shown in FIG. The side of the projection 21 of the photosensitive material F
The ring member 16 rotates counterclockwise as shown in FIG. In this state, light emitted from the light projecting portion 17 a of the optical sensor 17 toward the light receiving portion 17 b is blocked by the convex portion 21 of the ring member 16. The optical sensor 17 detects the presence of the photosensitive material F by detecting the interruption of the light.

According to the photosensitive material F detecting mechanism 30 configured as described above, the first and second outlet conveying rollers 9 are provided.
c, 9d, the photosensitive material F conveyed while being conveyed is detected by the displacement of the ring member 16 rotatably attached to the first conveying roller. Even if it is, the photosensitive material F can be reliably detected.

For cleaning and maintenance, first,
The second outlet transport rollers 9c and 9d are used alone or
Even when the rack 14 is removed from the drying unit 6, the ring member 16 is merely attached to the first outlet conveyance roller 9 c, so that it is not necessary to consider wiring or the like, and the first outlet conveyance roller 9 c does not need to be considered. The roller 9c can be removed together with the other transport rollers 9 and the rack 14.

In the above-described embodiment, the projection 21 of the ring member 16 is not arranged between the light projecting portion 17a and the light receiving portion 17b of the optical sensor 17 in a normal state. The photosensitive material F is detected when the convex portion 21 of the ring member 16 blocks the light emitted from the light projecting portion 17a toward the light receiving portion 17b due to the rotation of the ring member 16. However, in a normal state, the projection 21 of the ring member 16 is
7 is disposed between the light projecting unit 17a and the light receiving unit 17b, and the rotation of the ring member 16 causes the light projecting unit 1 to rotate.
A configuration may be adopted in which the photosensitive material F is detected when the light emitted from 7a enters the light receiving section 17b.

[0029]

According to the first to third aspects of the present invention,
A ring member that rotates about the axis of the transport roller by contacting the photosensitive material that is transported by the transport roller, and a displacement of an outer peripheral portion of the ring member caused by the rotation of the ring member is detected by a detection unit; Thus, since the photosensitive material is detected, the photosensitive material can always be detected accurately.

According to the fourth aspect of the invention, the detecting means for detecting the photosensitive material by detecting the displacement of the outer peripheral portion of the ring member accompanying the rotation of the ring member sandwiches the outer peripheral portion of the ring member. Since the optical sensor includes the optical sensor having the light projecting unit and the light receiving unit disposed in the optical sensor, the light projecting unit and the light receiving unit of the optical sensor can be arranged close to each other. For this reason, a malfunction due to external light of the optical sensor can be prevented, and the photosensitive material can be detected more accurately.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a photosensitive material processing apparatus to which the present invention is applied.

FIG. 2 is an enlarged view showing a main part of FIG.

FIG. 3 is a plan view showing a main part of a photosensitive material detection mechanism 30 according to the present invention.

FIG. 4 is a side view of the vicinity of a photosensitive material detection mechanism 30 according to the present invention.

FIG. 5 is a side view of the vicinity of a photosensitive material detection mechanism 30 according to the present invention.

FIG. 6 is a side view of the vicinity of a photosensitive material detection mechanism 30 according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 feed tray 2 developing tank 3 fixing tank 4 washing tank 5 basic processing section 6 drying section 9 transport roller 9c first outlet transport roller 9d second outlet transport roller 16 ring member 17 optical sensor 17a light emitting section 17b Light receiving section 18 Outlet section 21 Convex section 22 Concave section 24 Concave groove 25 Concave groove 30 Photosensitive material detection mechanism F Photosensitive material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Yagi 304 Kamiyama-cho, Kumiyama-cho, Kuse-gun, Kyoto 1 Dainippon Screen Mfg. Co., Ltd. Kumiyama Office (72) Inventor Masahiro Nakajima 304 Sayama-Shikai, Kumiyama-cho, Kuse-gun, Kyoto No. 1 Dainippon Screen Mfg. Co., Ltd. Kumiyama Office F-term (reference) 2H098 CA03 DA14 DA23 DA30

Claims (4)

[Claims] 1. A photosensitive material detection mechanism in a photosensitive material processing apparatus for transporting and processing a photosensitive material by a plurality of transport rollers, comprising: a transport roller having a circumferential groove formed in an outer peripheral portion thereof; A ring member engaged with the concave groove, which rotates around the axis of the transport roller by contacting the photosensitive material transported by the transport roller; and a ring associated with the rotation of the ring member. A detecting means for detecting a photosensitive material by detecting a displacement of an outer peripheral portion of the member; and a photosensitive material detecting mechanism in the photosensitive material processing apparatus, comprising: 2. A photosensitive material detecting mechanism in the photosensitive material processing apparatus according to claim 1, wherein an outer peripheral portion of the ring member has a thin plate shape extending to a position separated by a predetermined distance from an axis of the transport roller. A photosensitive material detection mechanism in a photosensitive material processing apparatus having a convex portion, wherein the detecting means detects a photosensitive material by detecting a displacement of the convex portion; 3. A photosensitive material detecting mechanism in a photosensitive material processing apparatus for transporting and processing a photosensitive material by a plurality of transport rollers, wherein a first groove having a circumferential groove formed in an outer peripheral portion thereof is formed. A conveying roller, and a concave groove facing the peripheral surface direction is formed in an outer peripheral portion thereof;
A second transport roller that rotates in contact with the first transport roller; and a photosensitive material that is nipped and transported by the first and second transport rollers, so that an outer peripheral portion of the second transport roller contacts the second transport roller.
A ring member engaged with the concave groove of the first transport roller, which rotates about the axis of the first transport roller so as to retreat from a position in which the roller has entered the concave groove; A detecting means for detecting a photosensitive material by detecting a displacement of an outer peripheral portion of the ring member accompanying rotation of the ring member; and a photosensitive material detecting mechanism in the photosensitive material processing apparatus. 4. The light-sensitive material detecting mechanism according to claim 1, wherein said detecting means is provided so as to sandwich an outer peripheral portion of said ring member. A photosensitive material detection mechanism in a photosensitive material processing apparatus including an optical sensor having a unit and a light receiving unit.