JPH06242515A - Guide width adjustment device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a guide width adjusting device for a photographic light-sensitive material capable of adjusting the guide width with high accuracy and speed. [Structure] The guide portion 2 is provided with a pair of paper guides G that can move toward and away from each other in the axial direction of the first screw shaft 6 as the first screw shaft 6 rotates, and detects the guide width. Position detector 5 for
However, the detection plate 13 is provided with a notch for confirming the stop position and a hole for confirming the guide width type, a photo interrupter 15 for detecting the notch, and a phototransistor 14 for detecting the hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide width adjusting device. More specifically, the present invention relates to a guide width adjusting device for adjusting the width of a guide of photographic photosensitive material in a conveying device of a photographic photosensitive material processing device.

[0002]

2. Description of the Related Art In a conventional guide width adjusting device (hereinafter, simply referred to as an adjusting device), a distance between a pair of members for guiding both side edges of a photographic photosensitive material (hereinafter, referred to as photographic paper) is
It is adjusted by rotating the screw shaft. That is, this screw shaft is formed by coaxially connecting two shafts each having a male screw in the opposite direction, and the screw shaft is arranged so as to traverse the conveying direction of the printing paper. Further, a mechanism is provided in which a pair of nuts, each of which is provided with a guide member and oppositely formed screws in opposite directions, are screwed onto the screw shaft so that the guide members face each other.
A disc-shaped detection plate for confirming the position of the guide width is coaxially attached to the screw shaft. The screw shaft is rotated by a motor or manually.

When the screw shaft is rotated to change the guide width, a single sensor such as a photo interrupter or a phototransistor detects the position of the notch set on the outer circumference of the detection plate for each corresponding guide width. The guide width is confirmed by doing. That is, FIG.
As shown in FIG.
Is set (for example, a protrusion is formed on the outer circumference of the detection plate), and a specific guide width is detected by the number of notches 53 counted from the origin 52. Usually, the origin is set to correspond to the maximum guide width or the minimum guide width.

Further, as shown in FIG. 7, one or more holes 55 indicating the guide width type for each corresponding guide width on the detection plate 54.
The one formed in the radial direction is also used. In the case of the detection plate of FIG. 7, three phototransistors for detecting the holes 55 are arranged in the radial direction of the detection plate 54. When the phototransistor detects the holes 55, the number and arrangement of the holes 55 are checked, and the guide member is stopped when the target guide width is met.

[0005]

In the conventional adjusting device (FIG. 6), the screw shaft is rotated once to reach the origin of the detection plate in order to ensure the positioning every time the guide width is changed. It is necessary to return (rotate the screw shaft until the sensor detects the origin confirmation mark). Then, the screw shaft is rotated by the number of notches corresponding to the predetermined guide width. Therefore, the time required is extremely long.

Further, if the power of the apparatus is turned off for maintenance or the like, the guide width will change. However, if the photographic paper having the width set before turning off the power is turned on and conveyed, the guide width of the apparatus changes. Sound function is impaired. That is, if the guide width is narrower than the width of the printing paper, paper jam occurs, and conversely, if the guide width is wider than the width of the printing paper, the printing paper comes out of the guide and cannot be conveyed. .

In the other adjusting device (FIG. 7), an operation error is likely to occur due to a slight detection time difference between the plurality of phototransistors, and therefore the adjustment of the mounting position of the phototransistors becomes extremely troublesome.
Therefore, the stop position accuracy becomes low.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an adjusting device capable of easily adjusting a guide width in an extremely short time and in which a trouble such as a paper jam does not easily occur. I am trying.

[0009]

The adjusting device of the present invention comprises:
(A) a moving member having a photographic light-sensitive material guide,
(B) an operating member with which the moving member is screwed, (c) a drive unit for driving the operating member, and (d) a guide width type confirmation mark and a guide stop position that can move together with the operating member. A detection unit having a confirmation mark, and (e) a controller for comparing information about the width of the photographic photosensitive material with the current position of the photographic photosensitive material guide and sending a drive signal to the drive unit. Is characterized by.

It is preferable that a first detector for detecting the guide width type confirmation mark and a second detector for detecting the guide stop position confirmation mark are provided.

Further, (a) the moving member is composed of a nut, (b) the operating member is composed of a screw shaft, and (c) the detecting portion is composed of a disk fixed about the screw shaft as an axis. (D) The guide stop position confirmation mark is composed of a plurality of notches formed on the outer periphery of the disc, and (c) the guide width type confirmation mark is formed on the disc. It can be composed of a plurality of holes formed in a portion corresponding to.

[0012]

In the adjusting device of the present invention, the drive member rotates the operating member and the detecting unit in synchronization. Along with the rotation of the operating member, the moving member screwed onto the operating member moves in the axial direction of the operating member, so that the photographic photosensitive material guide guide provided on the moving member also moves, so that the guide width can be adjusted.
Further, a guide stop position confirmation mark (hereinafter referred to as a position mark) of the detection unit that is rotating at the same time as the operation member is detected, and a guide width type confirmation mark corresponding to the position mark at that time is detected, and the target is detected. It is confirmed whether or not it is the guide width. In this way, the drive unit rotates the operating member until reaching the target guide width.

As described above, since the stop position and the mark indicating the guide width at the stop position are detected separately, the stop position error is extremely small. Therefore, there is almost no error in the detection of the guide width type confirmation mark. Further, since it is not necessary to return the guide width to the reference value every time the adjustment is performed, the adjustment time is greatly shortened.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the adjusting device of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a partially sectional front view showing an embodiment of the adjusting device of the present invention, FIG. 2 is a perspective view showing a guide portion of the adjusting device of FIG. 1, and FIG. 3 is a detection plate in the adjusting device of FIG. FIG. 4 is a block diagram showing an outline of a control mechanism in the adjusting device of FIG. 1, and FIG. 5 is a flowchart showing an example of guide width adjustment by the adjusting device of FIG.

As shown in FIG. 1, the adjusting device 1 comprises a guide portion 2, a drive portion 3, a connecting portion 4 connecting the guide portion 2 and the drive portion 3, and a position detecting portion 5. There is. The guide part 2 and the drive part 3 are almost the same as the conventional ones.

In the guide portion 2, the first screw shaft 6 is rotatably supported by the machine frame 7 at both ends and an intermediate point. The first screw shaft 6 is a shaft in which a right-hand thread is formed on the outer circumference and a shaft in which a left-hand thread is formed, which are coaxially connected to each other. A first nut 8 is screwed onto each shaft. There is. This pair of first
A paper guide G (corresponding to a photographic photosensitive material guide guide in the claims) for guiding both side edges of the printing paper P is attached to each of the nuts 8 so as to face each other.

This pair of paper guides G is, as shown in FIG. 2, another screw shaft 9 (referred to as a second screw shaft) arranged from the first nut 8 in parallel with the first screw shaft 6. It is attached so as to be hung over a pair of second nuts 10 that are screwed together.

The first screw shaft 6 is, as shown in FIG. 1, the drive shaft 1 of the drive unit 3 via the connecting portion 4.
1, the drive shaft 11 is connected to the output shaft S of the drive motor M via a gear reducer 12 including a large diameter gear 12a and a small diameter gear 12b.

A detection plate 13 is fixed to the rear end of the drive shaft 11 coaxially with the drive shaft 11. The position detecting section 5 is composed of the detection plate 13, a phototransistor 14 arranged to face the detection plate 13 and a photointerrupter 15 arranged to face the outer peripheral edge of the detection plate 13. Has been done.

In the adjusting device 1 thus constructed, when the drive motor M is rotated, the rotation is transmitted to the first screw shaft 6 by the speed reducer 12, the drive shaft 11 and the connecting portion 4. At the same time, as shown in FIG. 2, in the connecting portion 4, the first screw shaft 6 and the second screw shaft 6
The same rotation is transmitted to the second screw shaft 9 by the chain 16 wound around the screw shaft 9. At this time, since rotation of both nuts 8 and 10 is suppressed by the paper guide G, rotation of the drive motor M in one direction widens the interval between them (that is, widens the space between the paper guides G) and rotates in the opposite direction. As a result, the distance between them becomes narrower (the space between the paper guides G becomes narrower). In this way, the guide width is adjusted.

In the position detector 5, the detection plate 13 is fixed to the drive shaft 11 and therefore rotates in synchronization with the screw shafts 6 and 9. As shown in FIG. 3, the detection plate 13 is formed with a notch 17 for confirming the stop position at the outer peripheral edge thereof, and various holes 18 for confirming the guide width type are formed at positions corresponding to the notches 17 on the plate surface from the center thereof. Are formed.

For example, the hole corresponding to the notch d has a width of photographic paper of 152 mm, e is 127 mm, f is 120 mm, and g is 117 m.
m, h is 102mm, i is 95mm, j is 89mm and k is 82.
It is 5 mm. Then, the photo interrupter 1 shown in FIG.
5, the notches 17 are sequentially detected, and the phototransistor 14 detects the holes 18 each time to confirm the corresponding guide width.

Although three phototransistors are used in this embodiment, the number of phototransistors is not limited to three in the present invention. The number of the guide width type confirmation holes 18 and the number thereof may be appropriately selected according to the number of types of the guide width to be applied.

Further, the detector is not limited to the phototransistor or the photointerrupter as in the present embodiment, and any known device having an appropriate detection accuracy such as a limit switch or a proximity switch can be adopted.

Next, the connecting portion 4 will be described with reference to FIG. As shown in FIG. 2, the connecting portion 4 includes a connecting unit 19 having two locking holes 19a on the first screw shaft 6 side and a connecting block 20 having two locking pins 20a on the drive shaft 11 side. It is configured. The first screw shaft 6 and the drive shaft 11 are connected by fitting the two locking pins 20a into the two locking holes 19a. As is clear from FIG. Also, the locking holes 19a are formed at positions deviated from the diameter of the connecting unit 19 and the connecting block 20. In this way, the first screw shaft 6
The connection between the drive shaft 11 and the drive shaft 11 is designed to be performed only at a single specific angular position (for example, it cannot be connected at a position rotated by 180 ° relative to each other), and the guide at the time of connection is used. The correct correspondence between the width and the angular position of the detection plate 13 is guaranteed.

The operation of the adjusting device 1 constructed as described above will be described with reference to FIGS.

First, by setting a magazine for printing paper, or by inputting the width of the printing paper with a keyboard (hereinafter, represented by a set of magazines),
A specific guide width type is sent to the controller C as guide width information. In the controller C, the guide width information is compared with the current guide width position obtained from the detector (such as the phototransistor 14) to determine the rotation direction of the motor M and then rotate the motor M. And
As described above, each time the photo interrupter 15 detects the cutout 17 in the detection plate 13, the corresponding guide width is checked by the phototransistor 14, and the motor M is stopped when the guide width information matches the guide width information.

When the motor M is stopped, due to backlash of each part of the drive mechanism, the actual stop position may be slightly different even if the rotation direction of the motor M is different until the same predetermined stop position. is there. However, FIG.
This problem can be solved by controlling the rotation direction of the motor M until it stops, as shown in FIG. In FIG. 5, the rotation direction of the motor M immediately before the stop is set to the large guide width → small guide direction. When the motor M is rotating in the small guide width → large guide direction, the motor M once passes the predetermined stop position. After checking the notch with the guide width that is one step larger, reverse the motor and stop it when it returns to the stop position. In the present invention, the direction is not particularly limited, and the direction may be set from small to large.

Further, when the power is turned on after the maintenance is completed, the guide width is automatically restored according to the chart shown in FIG.

As described above, in the present adjusting device, the single position confirmation notch is detected by the single sensor (for example, the photo interrupter), so that the operation error between the sensors and the mounting position accuracy between the sensors are affected. Therefore, the accuracy of the stop position is extremely high.

Moreover, the holes corresponding respectively to the plurality of kinds of guide widths set in advance corresponding to the cutouts are provided with the sensors (for example, phototransistors) corresponding to the holes.
Since the detection is performed by the method described above, it is not necessary to return the guide position to the reference position together with the detection plate each time the guide width is adjusted.

[0033]

According to the adjusting device of the present invention, the accuracy of setting the guide width is improved, and reliable and quick adjustment is possible.
In addition, even if the power is turned on and off during operation or the guide position is displaced due to an accident, it is automatically checked whether the guide is in the correct position and automatically adjusted to the correct position. sell.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an embodiment of an adjusting device of the present invention.

FIG. 2 is a perspective view showing a guide portion in the adjusting device of FIG.

3 is a plan view showing a detection plate in the adjusting device of FIG. 1. FIG.

4 is a block diagram showing an outline of a control mechanism in the adjustment device of FIG. 1. FIG.

5 is a flowchart showing an example of guide width adjustment by the adjustment device of FIG. 1. FIG.

FIG. 6 is a plan view showing an example of a detection plate in a conventional adjusting device.

FIG. 7 is a plan view showing another example of the detection plate in the conventional adjusting device.

[Explanation of symbols]

 1 Adjustment Device 6 1st Screw Shaft 8 1st Nut 9 2nd Screw Shaft 10 2nd Nut 13 Detection Plate 14 Phototransistor 15 Photointerrupter 17 Notch 18 Hole C Controller G Paper Guide P Printing Paper

Claims (3)

[Claims] 1. A device for adjusting a guide width of a photographic light-sensitive material in a conveying device of a photographic light-sensitive material processing apparatus, comprising: (a) a moving member having a photographic light-sensitive material guide guide; and (b) the movement. An operation member with which the member is screwed, (c) a drive unit for driving the operation member, and (d) a guide width type confirmation mark and a guide stop position confirmation mark that can move together with the operation member. A detector,
(E) A guide width adjusting device provided with a controller for comparing information about the width of the photographic light-sensitive material with the current position of the photographic light-sensitive material guide and sending a drive signal to the drive unit. 2. A first detector for detecting the guide width type confirmation mark and a second detector for detecting the guide stop position confirmation mark.
Guide width adjusting device described. 3. (a) The moving member is a nut,
(B) the operating member is a screw shaft,
(C) the detection unit is a disc fixed around the screw shaft as an axis, and (d) the guide stop position confirmation mark is a plurality of notches formed on the outer periphery of the disc. e) The guide width adjusting device according to claim 1 or 2, wherein the guide width type confirmation mark is a plurality of holes formed in a portion of the disc corresponding to the cutout portion.