JPH0310509Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cross-over rack in a photographic material processing apparatus.

In the processing of photographic materials, such as photographic film, a conveyance leader guides the process through a series of processing steps, including development, bleaching, fixing, and stable hardening, through a processing tank filled with each processing solution. The photographic film is sequentially processed while repeating a meandering motion, descending from the upper part and rising from the lower part.

In this processing process, as a mechanism for smoothly feeding the photographic material into adjacent processing tanks, a cross consisting of a leader guide and a turn roller supported by the leader guide is installed above the adjacent processing tanks. Overlack is arranged.

The present invention improves the smoothness of the conveyance leader by modifying a part of the guide edge that repeatedly comes into contact with the conveyance leader among the leader guides having an inverted U-shaped guide notch that constitutes a part of the crossover rack. The goal is to ensure safe driving.

(Prior Art) A cross-over rack arranged above the connecting part of each processing tank that constitutes a part of a photosensitive material processing apparatus has a plurality of leader guides with inverted U-shaped guide notches arranged side by side. The photographic film is placed in the guiding path formed between the leader guide and the turn roller by holding the turn roller in the guide notches of the pair of leader guides, and the splice tape for film connection is provided at the rear part. The film reader attached is fed in.

The conveyance leader then ascends through the inverted U-shaped guideway while touching the guide edge of the guide notch, then makes a U-turn and is carried into the next processing tank. .

In the case of a conventional crossover rack, the conveyance leader that is fed runs in contact with the guide edge formed by the inverted U-shaped notch of a plurality of leader guides over almost its entire length. was.

(Problems to be solved by the invention) In the conventional crossover rack, an inverted U-shaped guide formed by a leader guide and a turn roller held in an inverted U-shaped guide notch of the leader guide. The conveyance leader sent into the path comes into full contact with the guide notch edge of each leader guide, and the frictional resistance against the conveyance leader increases accordingly, especially at the turning point of the conveyance leader. also appears prominently,
It was observed that the smooth U-turn of the conveyance leader was hindered, and that the durability of the conveyance leader deteriorated prematurely due to wear and buckling of the conveyance leader.

In addition, a portion of the processing liquid adheres to the edge of the guide notch of the leader guide, and when it dries and crystallizes, there is a problem in that it greatly impedes the movement of the conveying leader.

The object of the present invention is to provide a crossover rack which eliminates the above-mentioned problems inherent in conventional crossover racks and enables smooth U-turn travel of the conveyance leader.

(Means for solving the problem) In order to achieve this objective, the present invention has the following configuration. That is, in the cross-over rack in the photographic material processing apparatus according to the present invention, a plurality of leader guides each having an inverted U-shaped guide notch are arranged side by side, and a turn roller is held in the guide notch. In a crossover rack in which an inverted U-shaped guide path is formed between a leader guide and a turn roller, the guide edge of the inverted U-shaped guide notch of the leader guide, which the conveying leader moves in contact with, is formed in an uneven wave shape. It is characterized by the presence of

(Function) A crossover rack consisting of a plurality of leader guides provided with inverted U-shaped guide notches are arranged side by side, and a turn roller is held in the guide notches of these leader guides. It is arranged at the upper part of the connecting part of a pair of processing tanks.

The wide transport leader has two photographic films attached to the rear part using splice tape for connection, and the through holes drilled in the longitudinal direction of the center of the transport leader are engaged with the drive sprocket.
The conveyance leader is fed into an inverted U-shaped guideway formed between the leader guide and the turn roller, and the conveyance leader moves within the guideway while contacting the guide edge of the guide notch of the leader guide. , it goes around half a turn around the turn roller and moves into the next processing tank as a U-turn.

In the present invention, a plurality of leader guides are used, and when the conveying leader is in contact with the guide edge of the inverted U-shaped guide notch and travels in the direction of the arrow from FIG. 3 to FIG. The transportation leader is
Only the convex part of the guide edge of the uneven waveform makes contact in a state close to point contact, instead of the conventional line contact,
A U-shaped redirection of the conveying leader via the crossover rack is realized in a state close to point contact.

(Example) Next, a specific example of the crossover rack in the photographic material processing apparatus according to the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view of the crossover rack just before the transport leader starts a U-turn, and Fig. 2 is a front view centering on the crossover rack and drive sprocket just before the transport leader is sent in. .

In the figure, 1 is a crossover rack, and a base 2 is attached to the frame of the processing device (not shown).
A total of four leader guides 4 each having an inverted U-shaped guide notch 3 are fixedly arranged in parallel on the lower surface of the guide. In the inverted U-shaped guide notch 3 of the leader guide 4, the guide edge 5 on which the conveying leader slides has a wavy shape with concave portions 7 and convex portions 6 formed in succession alternately.

This wavy guide edge 5 is formed by, for example, forming convex portions 6 on the periphery of the guide notch 3 of the conventional leader guide 1 by punching 8 means, thereby forming concave portions 7 and convex portions 6 alternately on the guide edge 5. (Fig. 3), or the cutting die itself for forming the leader guide 1 is provided with corrugations corresponding to the concave portions and convex portions in advance, and the guide edge 5 of the leader guide 1 is formed with concave portions 7 and convex portions 6. (Fig. 4), or by alternately and continuously forming concave portions 7 and convex portions 6 by cutting the guide edge of the guide notch 3 in a ratchet shape (Fig. 4). 5), or by other appropriate means.

Incidentally, the recessed portion 7 and the convex portion 6 formed for each guide edge 5 of a plurality of leader guides, as shown in FIG.
The concave portions 7 and the convex portions 6 formed in the leader guides 4A of the even-numbered columns are arranged alternately, that is, between each concave portion 7 of the leader guides 4A of the even-numbered columns, the leader guides of the even-numbered columns 4B are formed in the leader guides 4A of the even-numbered columns. By locating each of the convex portions 6, the contact resistance received from the leader guide of the conveyance leader can be dispersed over a wide range.

The guide notches 3, 3 of two sets of leader guides 4A, 4B, which are arranged one-on-one, contain turn rollers 9, 9, respectively. , a pair of brackets 10 hanging from both ends of the base 2,
An inverted U-shaped guide path 11 is formed between the inverted U-shaped guide notch 3 and the turn roller 9 .

13 is the thickness at which a group of through holes 15 that mesh with the drive sprocket 14 are drilled in the longitudinal direction of the center.
It is a wide transport leader made of synthetic resin with a diameter of about 0.25 mm, and a plurality of ends of photographic light-sensitive material, for example, photographic film 17, are attached to the rear part of the transport leader 13 using splice tapes for connection.

(Effects of the invention) The present invention has a cross-over rack installed in order to transfer the transport leader with the photographic material attached to the rear from one processing tank to the next processing tank. Concave portions and convex portions are provided alternately and continuously on the guide edge of the U-shaped guide notch of the repeating leader guide, and the cross-over rack of the conveying leader allows the leader guide of the conveying leader to overlap during U-turn-shaped conveyance. The contact is limited to only the convex part of the wave-shaped guide edge, and the conveyance leader travels, so the conveyance leader travels in a state close to a line connection with all edge contact with the guide edge of all the leader guides as in the past. In comparison, in the case of the present invention,
The state is close to that of the dotted line, the wear resistance of the leader guide is significantly reduced, and conveyance troubles can be prevented. A remarkable effect was also observed in reducing conveyance torque. It is also recognized that the reduction in wear and tear on the conveyance leader extends the life of the conveyance leader, helps prevent the conveyance leader from buckling, and greatly contributes to ensuring the durability of the conveyance leader.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the crossover rack just before the transport leader starts a U-turn, Fig. 2 is a front view centering on the crossover rack and drive sprocket just before the transport leader is sent in, and Fig. 3 The figure is a front view of a part of the leader guide, FIGS. 4 and 5 are views corresponding to FIG. 3 showing other embodiments, and FIG. 6 is a guide edge 1 of the leader guide shown in FIG. FIG. In the figure, 1 is a crossover rack, 3 is an inverted U-shaped guide notch, 4 is a leader guide, 4A is a leader guide for odd rows, 4B is a leader guide for even rows, 5 is a guide edge, and 6 is a convex part, 7 is a recessed part,
Reference numerals 9 and 9 indicate turn rollers, 11 a guideway, and 13 a conveyance leader.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of leader guides each having an inverted U-shaped guide notch are arranged side by side, and a turn roller is held in the guide notch, so that the distance between the leader guide and the turn roller is In the cross-over rack in which an inverted U-shaped guide path is formed, the guide edge of the inverted U-shaped guide notch of the leader guide, with which the conveying leader comes into contact and moves, is formed in an uneven wave shape. Crossover rack in photographic material processing equipment. (2) The photographic light-sensitive material processing apparatus according to claim 1, wherein the recesses and projections formed on the guide edge of the leader guide are alternately formed in relation to adjacent leader guides. crossover rack.