JPH0443878Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a mechanism that assists in forming a loop of photographic material while automatically conveying the long photographic material from the printing section to the developing section roller of a photographic printer. Regarding.

(Prior art) While paper (photosensitive material) exposed to light in the printing section of a photographic printer is automatically sent to development,
The length of the paper is sequentially cut to fit the processing space of each tank in the developing section, and then the paper is sent to the developing section for development processing, but the exposure processing in the printing section is completed quickly due to the processing content. On the other hand, the development process using a processing solution (chemical solution) in each tank of the development section is relatively slow and requires a certain amount of time.The time difference required for this process is compensated for by making the middle part of the paper hang down in a loop shape so that it can be kept waiting. There is. Conventionally, as shown in FIG. 4, the leading end of the paper is supported and guided by the movable roller 11 of the pendulum arm 10, and then the paper 13 is fed in from the printing section roller 12.
This loop was formed by letting the material fall down and hang down naturally.

(Problem to be solved by the invention) Therefore, since the propulsive force of the paper 13 directly pushes the neck (base) 13a of the tip support part and bends it extremely downward, these folds are caused by the base surface and the base of the paper. This had the disadvantage that chicks were generated on the emulsion surface, which adversely affected the development finish.

The purpose of this invention is to eliminate the negative effect on the development finish by avoiding extreme bending of the exposed long paper during the accumulation and sorting process during the process of guiding and transporting the exposed paper to the developing section. .

(Means for solving the problem) As a means for solving the problem, the leading end of the long photosensitive material sent out from the printing section is supported by a conveying device, guided to the drive roller of the developing section, and then conveyed through a loop. In this mechanism, one side of the receiving guide is pivoted parallel to the edge of the leading edge of the photographic material below the photographic material being fed, and is pushed horizontally by a spring to support the subsequent photographic material. The present invention proposes a loop formation assisting mechanism in a photosensitive material conveying device of a photographic printer, which is equipped so that the receiving guide is gradually pushed open downward by the load of the loop-shaped photographic material placed on the receiving guide.

(Function) While the conveying device for the long photosensitive material sent out from the printing section supports the tip end and sends it to the developing section, the feeding of the tip support section is stopped and the subsequent photographic photosensitive material sent from the printing section is stopped. The material is supported by the receiving guide of this invention, and as the load of the loop formed by the subsequent photographic light-sensitive material gradually increases, the load pushes the spring and gradually pushes the receiving guide downward to open the photographic material on which it is placed. Slide it down to form a loop.

In particular, the neck (base) of the tip (head) support part of the photosensitive material fed from the printing section is supported by the other side (tip side) of the receiving guide, and the upper surface of the receiving guide is pressed horizontally. A circular loop is formed that supports the following photographic material horizontally and curves gently, and this subsequent loose loop absorbs the propulsive force of the photographic material being sent in, and the force is directly applied to the neck. By avoiding this, the neck is prevented from being suddenly pushed downward.

As the volume of the loop formed in this way increases, the supporting force of the spring gradually succumbs to the load, and the receiving guide is gradually pushed open downward, and the loop formed into a gentle curve is dropped downward, and as shown in the photo. It is possible to form a loop without giving a sudden bending shock to the support neck of the photosensitive material.

(Example) Next, a specific example of the loop formation assisting mechanism according to this invention will be described with reference to the drawings.

Fig. 1 is a perspective view of the main parts of a conveyance device showing the loop formation assisting mechanism of this invention, each figure in Fig. 2 is a schematic side view of the conveyance device sequentially showing the loop formation assisting operation by the same mechanism, and Fig. 3 is the same mechanism. 1 is a perspective view of the main parts showing an embodiment of the receiving guide, and 1 is a receiving guide that helps form a loop, and is made of a metal plate having a predetermined width and length, and its base end 1a is pivoted by a support shaft 2. and press it horizontally with spring 3 to install it.
The leading end side 1b of the horizontal receiving guide 1 is parallel to the lower center of the conveying drum 4 which is supported parallel to the support shaft 2 to convey the long photographic paper 9 fed from the printing unit drive roller 7. Arrange it so that it faces you.

The conveyance drum 4 consists of left and right drum surfaces 4a and 4b having a recessed part 5 in the center.
a, 4b, a crimping arm 6, which can be opened and closed up and down;
6 is attached along the axis, and the photographic paper 9 is fed in.
The tip portion 9a of the drum 4 is held in pressure contact with the drum surfaces 4a, 4b by the pressure arms 6, 6, and is conveyed to the developing section driving roller 8 by the rotation of the drum 4. At this time, the rear end of the photographic paper 9, like the leading end 9a, is held in pressure contact with the transport drum surfaces 4a, 4b by an arm (not shown).

The operation of this loop forming assisting mechanism will be explained with reference to FIG. 2. As shown in FIG.
The conveyor drum 4 is pressed and clamped by the crimping arms 6, 6 which are lowered and closed along the surfaces 4a, 4b, and the conveying drum 4 is rotated to a predetermined position as shown in Fig. 2 and stopped. The neck (root) 9b of the leading end 9a of the photographic paper 9, which is held between the paper 6 and the paper 9, is supported by the leading edge 1b of the receiving guide 1, which is supported horizontally at the same height, and the photographic paper 9 is pushed in sequentially from the printing section. The force gently bends the photographic paper 9 on the horizontal plane of the receiving guide 1 to help form a gentle loop, and as the volume of the loop formed by the photographic paper 9 on the receiving guide 1 increases, the load decreases. The receiving guide 1 resists the spring 3 by
Gradually push open downward to drop the loop of photographic paper 9 on which it was placed, rotate the conveyance drum 4, and press the crimping arm 6 on the side of the developing section opposite to the printing section.
6 is raised and released to free the leading end 9a of the photographic paper 9, and the process is completed by conveying it to the developing section drive roller 8.

In this invention, the tip side 1b of this receiving guide 1 is
For example, by rolling it downward to make a smooth surface (not shown), and as shown in FIG.
When the loop formed on the receiving guide 1 moves downward, due to the smooth surface of the tip side 1b of the receiving guide 1,
In addition, due to the rotation of the guide roller 1d, the photographic paper 9
This prevents scratches on the emulsion surface.

(Effects of the invention) As described above, this invention is used as a loop formation assisting mechanism in the photosensitive material transport device of a photographic printer. When the leading end of the photographic light-sensitive material is supported by a delivery device and accumulated, the neck (base) of the leading end supporting part is pivoted on one side (base end side) and is supported horizontally by a spring. The photosensitive material that follows is supported by the side (tip side), and the following photosensitive material is received and guided by the horizontal surface of the receiving guide by the propulsion force, forming a gently curved loop, and the increased load pushes the receiving guide downward and open. Since the loop-shaped photographic material is dropped into a regular position, the photographic material is not bent during loop formation and conveyance during processing. In particular, the propulsive force of the photographic material fed from the developing section is absorbed by this loop section, and is no longer applied directly to the neck of the tip support section.

In this way, during the loop forming process during automatic processing of photographic materials, there is no risk of wrinkles such as cracks occurring on the emulsion surface and base surface of the photographic material, especially at the top neck, due to sudden bending. The effect is that wrinkles do not appear on the surface of the photographic light-sensitive material due to development and finishing, and a beautiful finish can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conveying device equipped with a loop forming assisting mechanism capable of implementing this invention, Fig. 2 is a schematic side view of the carrying device sequentially showing the operation of the loop forming assisting mechanism, and Fig. 3 is a receiving device according to this invention. FIG. 4 is a perspective view of essential parts showing an embodiment of the guide, and FIG. 4 is a schematic side view of a conveying device showing a conventional loop forming operation. In the figure, 1 is a receiving guide, 1a is one side (base end side),
2 is a support shaft, 3 is a spring, 7 is a burning part drive roller,
8 is a developing unit driving roller, 9 is a photographic paper, and 9a is a leading end.

Claims (1)

[Scope of utility model registration request] In a mechanism in which the leading end of a long photosensitive material sent out from a printing section is supported by a conveying device and guided to a driving roller of a developing section and transferred, a subsequent photosensitive material is accumulated in a loop shape, A receiving guide whose one side is pivoted parallel to the leading edge of the photographic material being fed is pushed horizontally by a spring to support the following photographic material, and a loop-shaped photograph is placed on this receiving guide. A loop forming assist mechanism in a photographic printer's photosensitive material transport device, which is installed so that the receiving guide is gradually pushed open downward by the load of the photosensitive material.