JPH0444521Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a mechanism for preventing meandering of photographic material being conveyed by a conveying device from a printing section to a developing section in an automatic photographic processing machine. .

(Prior Art) As a conventional meandering prevention mechanism of this type, a long photosensitive material fed from a printing section is transported by a conveying device, for example, a moving roller and a pressure roller provided at the lower end of an arm driven in a pendulum type. In an arm-type conveyance device that grips the leading edge of a photographic photosensitive material and drives an arm to transport the leading edge to the developing unit driving roller, the pressure roller, which is in parallel contact with the driving roller when conveying it to the developing unit, is moved along its length. With the center along the direction as the base point, the left and right ends are pivoted to swing up, down, left and right,
The angle of the pressure roller is changed by the frictional resistance force applied to a part of the pressure roller in different directions due to the meandering of the photographic material. °)
This prevents meandering by ensuring that they are in even contact with each other.

(Problem to be solved by the invention) This meandering prevention mechanism for photographic light-sensitive material, which is based on the floating shaft support of the drive roller and the pressure roller pressed against the drive roller, prevents the photosensitive material being conveyed between the drive roller and the pressure roller. Since the direction is corrected by swinging the pressure roller while it is in a crimped state using the large frictional resistance applied to the surface, the strong friction of the pressure roller can damage the emulsion surface of the photographic light-sensitive material, adversely affecting the finish of the development. There was a drawback to giving.

From this point of view, this invention has fundamentally revised the meandering prevention mechanism based on the floating shaft of the pressure roller that is in pressure contact with the drive roller, and has realized the prevention of meandering of the photographic material being fed.

(Means for solving the problem) The meandering prevention mechanism in the photosensitive material conveying device of the photoprocessing machine of this invention supports the leading end of the long photosensitive material fed from the printing section and prevents the feeding loop from moving. In a conveying device that transports the loop photosensitive material to the developing section while it is being produced, an arm rod is pivoted to swing inward and outward along the conveying direction from the inside of the loop photosensitive material near the developing section. A width guide consisting of left and right width regulating frames equipped with free rollers is installed on the outside of the photographic material to be supported and fed relative to this arm rod, and the conveying device is equipped with an intermittent width guide in conjunction with the conveying movement of the photosensitive material. The arm rod is pushed outward and swung by the extrusion section which is provided to operate in a specific manner, and the hanging portion of the loop photosensitive material to be fed is pushed from inside by the arm rod section to form a turn section. The following hanging parts are pressed against the width guide so that both edges of the photosensitive material are fitted between the width regulating frames.

(Function) The photosensitive material sent from the printing section is constantly pushed toward the transportation device (inward) by a spring by the extrusion section installed intermittently in the transportation device that draws and forms the photosensitive material into a loop. The arm lever is pushed outward against the force of the spring and swung, and the loop hanging part of the photosensitive material near the developing section is pushed up from the inside with the lower part of the arm lever, and the loop part is brought up to create a turn part. Edges on both sides of the turn of this feeding photosensitive material
is fitted between the width regulating frames of the width guide, and is fed from the left and right to the intermediate drive roller of the developing section while correcting the feeding with the regulating frames, thereby preventing meandering.

In addition, the hanging part following the turn part of the loop photosensitive material pushed outward by the swinging of the arm rod,
By applying the outward tension caused by the upward force of the arm rod and the hanging gravity of the loop photosensitive material to the free roller of the width guide and applying appropriate tension to the turn section, the photosensitive material at the turn section is This free roller prevents the rod from escaping outward from the push-up force and floating, thereby ensuring a tight press-fit between the width regulating frames, and also rotates against the gravity of the long photosensitive material hanging in a loop shape. Then, it can be lightly transported by the intermediate drive roller of the developing section.

(Example) Next, a specific example of the meandering prevention mechanism of this invention will be described with reference to the drawings.

Fig. 1 is a schematic cutaway side view showing the meandering prevention mechanism in the conveyance device, Fig. 2 is a perspective view of the conveyance device showing the arm of the meandering prevention mechanism, and Fig. 3 is a vertical side view of the main parts of the same. 4 is a partially cutaway perspective view of the width guide of the meandering prevention mechanism, and FIG. 5 is a schematic side view of the conveyance device showing each operation of the meandering prevention mechanism in sequence. A recessed part 3 is formed by cutting out the central circumferential surface of the transport drum 2 fixed to the top, and a cam-shaped extrusion part 4 that is linked to the rotation of the transport drum 2 is provided in this recessed part 3. A crimp rod 5 that moves up and down in the centripetal direction parallel to the axis,
It is equipped with 6. Reference numeral 8 denotes an arm rod, whose upper part is pivoted so as to swing perpendicular to the axis on the side of the developing section of the conveyance device 1, and is pressed inward in the axial direction by a spring 9. A guide roller 10 is attached to the end of the outward-facing elbow piece 12 to reduce frictional resistance to the photographic photosensitive material being transported, and an inward-facing cam roller 11 is attached to the intermediate portion that contacts the extrusion section 4 of the conveying device 1. .

13 is a width guide, and width regulation frame 1 facing left and right
4, 14 and a free roller 15, the free roller 15 is passed freely through horizontal through holes 14a, 14a bored opposite to the left and right width regulating frames 14, 14 attached to the frame 16, and the free roller 15 is shafted to the frame 16. It is attached so that it can move freely.

The operation of this meandering prevention mechanism is explained using Fig. 5.
As shown in Fig. 1, the leading edge 17a of the long photosensitive material 17 fed from the printing section is clamped onto the surface of the drum 2 by the crimping rod 5, and the conveying drum 2 is rotated to a certain position and then stopped. , starts forming a loop with the subsequent photographic material 17 that is sequentially fed. In this case, the arm rod 8 is pushed outward by the cam-like extrusion portion 4 against the force of the spring 9. Next, as shown in FIG.
7a is released by floating the pressure rod 5 and delivered to the developing section intermediate drive roller 19. In this case, the arm rod 8 is released from the cam-shaped extrusion portion 4 that rotates together with the conveyance drum 2, and is pushed into the recessed portion 3 by the force of the spring 9 so as not to interfere with the transfer operation to the intermediate drive roller 19. let Subsequently, as shown in Fig. C, the photographic material 17 is automatically cut into a certain length by rotating the conveying drum 2 as it is delivered to the developing section.
After that, the end side 17b is crimped and clamped with the rear end crimping rod 6,
When the pressure rod 6 reaches a certain position, the rotation of the drum 2 is stopped, and while the intermediate drive roller 19 continues to feed the loop photosensitive material 17 to the developing section,
The guide roller 10 at the bottom of the arm rod 8, which is pushed outward by the cam-like extrusion part 4 against the force of the spring 9, pushes the hanging part of the photosensitive material 17 near the intermediate drive roller 19 outward and raises the loop. The formed turn portion 17c is pressed between the width regulating frames 14, 14 of the width guide 13 provided oppositely, and the edges of the photographic material 17 are fed from the left and right by the width regulating frames 14, 14. While straightening the photosensitive material 17, the hanging part following the turn part 17c pushed out by the guide roller 10 is stretched over the free roller 15.
The loop portion is sent out by an intermediate drive roller 19.
In this case, the through holes 14a, 1 of the width regulating frames 14, 14
By providing play in 4a and allowing the free roller 15 to freely move around its axis, the frictional resistance between the guide roller 10 and the turned portion 17c of the photographic material 17 that has been pushed up is automatically adjusted so as not to become large, and the meandering prevention mechanism is automatically adjusted. This has the effect of making the transport even smoother. At this time, the tip crimping rod 5, which was previously released and rotated to the printing section side by the rotation of the conveyance drum 2, crimps and clamps the tip side 18a of the next photosensitive material 18 to begin forming the next loop. Furthermore, as shown in FIG. The guide roller 10 of the arm rod 8 is thereby removed from between the regulating frames 14, 14 of the width guide 13, and at the same time, the crimp rod 6 is floated and released, allowing photographic exposure. The trailing edge 17b of the material 17 is removed from the conveyance drum 2 and conveyed to the developing section by the intermediate drive roller 19 to complete the process. In this way, meandering of the photographic light-sensitive material is successively and repeatedly prevented during the conveyance process from the printing section to the developing section.

(Effects of the invention) The meandering prevention mechanism of this invention is pivotably mounted in a conveying device that sequentially feeds the long photosensitive material sent from the printing section, forms it into a loop, and sends it to the developing section. The arm rod, which is pushed inward (backward) by a spring, is pushed outward (forward) by an extrusion section provided intermittently to push up the hanging part of the loop-shaped photosensitive material from the inside. A turn part is formed by raising the loop part, and this turn part is pushed between the left and right width regulating frames of width guides provided oppositely, and the edges of the photosensitive material to be fed are controlled from the left and right. It is sent to the developing section by an intermediate drive roller, and the frictional resistance between the regulating arm rod and the photosensitive material at the turn section is extremely small because it is due to the extremely small (light) hanging gravity of the loop section. It is small in size and can be transported smoothly and reliably. Therefore, a beautiful finish can be obtained without the risk of damaging the emulsion surface of the photographic material being fed.

Moreover, the rotational support by free rollers in the width guide disperses and reduces the frictional resistance force applied between the arm rod and the turn of the photosensitive material, which makes it easier to control meandering during the conveyance process. In order to improve the smoothness, the effects related to meandering prevention and protection of the photosensitive emulsion surface are increased.

[Brief explanation of the drawing]

Fig. 1 is a schematic notched side view of a conveyance device equipped with a meandering prevention mechanism that implements this invention, Fig. 2 is a perspective view of only the conveyance device showing the arm of the meandering prevention mechanism, and Fig. 3 is a main part of the same. FIG. 4 is a perspective view with a part of the width guide of the meandering prevention mechanism cut away, and FIG. 5 is a schematic side view of the conveying device sequentially showing the operation of the meandering prevention mechanism of this invention. In the figure, 1 is a conveyance device, 2 is a conveyance drum, 3 is a recessed part, 4 is an extrusion part, 5 and 6 are crimping rods, 8 is an arm rod,
9 is a spring, 13 is a width guide, 14 is a width regulation frame, 1
5 is a free roller, and 17 and 18 are photographic materials.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a conveying device that supports the leading end of a long photosensitive material fed from a printing section and conveys it to a developing section while forming a feeding loop, the developing section of the conveying device An arm lever pivoted to the side so as to swing in and out along the conveying direction is pushed inward toward the conveying device by a spring, and the photosensitive material to be conveyed is placed on the outside sandwiching the arm rod. A meandering prevention mechanism in a photosensitive material conveying device of a photoprocessing machine, which is equipped with a width guide consisting of left and right width regulating frames equipped with free rollers, and a push-out section that operates to push out the arms outward intermittently. . (2) The conveying device is equipped with a conveying drum having pressure rods on the drum surface that support the front and rear ends of the photosensitive material, and the axis of the concave notch provided on the central circumferential surface of the conveying drum. A meandering prevention mechanism in a photosensitive material conveying device of a photographic processing machine according to claim 1, wherein a cam is provided as an extrusion portion, and an arm rod is inserted into the recessed portion.