JPH04350052A - Width guide device for strip-shaped body - Google Patents

Abstract

PURPOSE:To make a correct positioning of a width guide by detecting the position of a width guide by rotating a screw shaft by a motor, shifting a driven member engaged with the screw shaft in the axial direction of the screw shaft, and pushingly pressing the width guide against the driven member through an energizing means, thereby controlling the motor on the basis of the detected value. CONSTITUTION:When the size of a color paper 11 is changed, a screw shaft 13 is rotated through a timing belt 33 by the specified quantity of rotation of a pulse motor 31, and a driven block 20 engaged therewith makes a parallel movement in the axial direction of a reference guide shaft 12. The driven block 20 is pushingly pressed against a fitting bracket 15b of a guide base 15 by means of a coil spring 21, and a width guide 16 follows the driven block 20 in a correct manner. When a positioning sensor 42 is turned ON in response to the paper width to be set, a controller 45 makes a correct positioning of the width guide 16 to the specified paper width guide position by stopping rotation of the motor 31.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a width guide device for a strip of material, and more particularly to a width guide device for a strip of material that guides both widths of a strip of photosensitive material used in photographic printers and the like.

0002

2. Description of the Related Art A photographic printer uses a long strip of color paper on which images of each frame of photographic film are printed. For this reason, a width guide device is used to guide the color paper to a printing position and to a paper processor. Additionally, photo printers are designed to allow multiple types of color paper of different widths to be loaded, allowing printed photos of various sizes to be obtained. For this reason, the width guide device is configured to set the width guide to a predetermined guide width in accordance with the width of the color paper.

0003

[Problems to be Solved by the Invention] However, in the past, a width guide was attached so as to be movable in the width direction of the color paper, and the width guide was moved in the width direction of the color paper by the reciprocating movement of a female threaded portion screwed onto a threaded rod. I was trying to do that. For this reason, there is a problem in that accurate positioning is impossible due to the mounting play of the threaded rod and the play of the female threaded portion on the threaded rod.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a width guide device for a band-like material, which eliminates the influence of looseness in the installation of a width guide and allows accurate positioning.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a motor, a screw shaft rotatably rotated by the motor, a reference guide shaft provided parallel to the screw shaft, and a reference guide shaft. a driven member attached to the guide shaft so as to be freely movable in the axial direction; a female screw portion formed on the driven member and screwed to the screw shaft; and a width guide attached to the reference guide shaft so as to be movable in the axial direction. , and biasing means for pressing the width guide against the driven member. Another invention is to provide the above invention with a sensor that detects the position of the width guide and a control means that controls the motor based on a position detection signal from this sensor.

[0006]

[Operation] When the threaded rod is rotated by the motor, the driven member screwed into the threaded rod moves in the axial direction of the threaded rod. Since the width guide is pressed against the driven member via the biasing means, even if there is any play in the installation between the width guide and the driven member, the influence of this play is eliminated. This allows accurate positioning of the width guide. In addition, since the position of the width guide is detected and the motor is controlled based on this, even if there is mounting play between the motor and the width guide, this play will not accumulate and the positioning of the width guide will be easier. It can be done even more accurately.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a width guide device for a photographic printer. A reference guide rod 12 is attached to a frame 10 of a photo printer in the width direction of color paper 11. In addition, a threaded rod 1 is parallel to this reference guide rod 12.
3 is rotatably attached.

A pair of guide bases 15 are attached to the reference guide rod 12 so as to be movable on the guide rod. Further, the guide base 15 has a rectangular base body 15a.
Mounting brackets 15b and 15c are attached at right angles to both ends of the bracket. Mounting brackets 15b, 15c
A guide hole is formed in which the reference guide rod 12 is inserted. Color paper 1 is attached to this guide base 15.
A paper width guide 16 is attached to hold the side edge of the sheet. The paper width guide 16 includes a holding groove 17 that supports the side edges of the color paper 11 so as to sandwich them therebetween.

The reference guide rod 12 includes a guide base 15.
between the mounting brackets 15b and 15c of the driven block 2.
0 is attached to the guide rod 12 so as to be movable in the axial direction. Further, a coil spring 21 is attached between the driven block 20 and one mounting bracket 15b to bias the driven block 20 toward the other mounting bracket 15c.

[0010] The threaded rod 13 is formed with threaded portions 25 and 26 whose screw directions are opposite to each other with the center as a boundary. The female threaded portion 20a of the driven bracket 20 is screwed into the threaded portions 25 and 26 of the threaded rod 13. Further, one shaft end of the threaded rod 13 projects outward from the machine frame 11, and a pulley 30 is attached to this projecting end. A pulse motor 31 is fixed to the machine frame 11, and a pulley 32 is also attached to this drive shaft. A timing belt 33 is stretched between these pulleys 30 and 32.

[0011] Furthermore, a positioning sensor 41 is installed in the machine frame 11.
~44 are attached. This positioning sensor 41
- 44 are for accurately positioning the width guide 15 according to the width of the color paper 11, and in this embodiment, four guides are installed corresponding to the width type of the color paper 11 to be used. Detection signals from these positioning sensors 41 to 44 are sent to a controller 45. The controller 45 stops the rotation of the motor 31 when the width guide detection signal of the positioning sensor is input.
Controls the driver 46.

Next, the operation of this embodiment will be explained. When changing the size of the color paper 11, the pulse motor 31 is rotated by a predetermined amount. This rotation causes the threaded rod 13 to rotate via the timing belt 33. As the threaded rod 13 rotates, the driven block 20 screwed thereon moves in parallel in the axial direction of the reference guide rod 12. Driven block 2
0 is pressed against the mounting bracket 15b of the guide base 15 by the coil spring 21, so the width guide 16
follows the driven block 20 exactly. Then, when the positioning sensor 42 selected corresponding to the paper width to be set is turned on, the controller 46 stops the rotation of the motor 31. As a result, the width guide 16 is accurately positioned at a predetermined paper width guide position.

In the above embodiment, the number of positioning sensors 41 to 44 corresponding to the type of width to be set is provided.
This can be omitted. In this case, the number of drive pulses is determined for each guide width to be set, and the pulse motor is controlled based on this number of drive pulses.

[0014]

[Effects of the Invention] According to the present invention, the driven member screwed onto the threaded rod is pressed against the mounting bracket of the width guide by a coil spring, thereby eliminating the influence of mounting play between the driven member and the width guide. This allows for accurate positioning of the width guide. In addition, since the motor is controlled based on the width guide detection signal of the positioning sensor, even if there is mounting play between the motor and the driven member, the width guide will not be affected by the cumulative error and the width guide will be accurate. can be positioned.

[Brief explanation of drawings]

FIG. 1 is a front view showing a paper width guide device of a photographic printer embodying the present invention.

[Explanation of symbols] 10 Color paper 12 Standard guide rod 13 Threaded rod 15 Guide base 16 Paper width guide 20 Driven block 20a Female thread part 21 Coil spring 31 Pulse motor 41-44 Positioning sensor

Claims (2)

[Claims] Claim 1: A width guide device for a band-shaped material, which has width guides in contact with both side edges of the band-shaped material and moves these width guides in accordance with the width of the band-shaped material, including a motor and a motor that is rotatable by the motor. a screw shaft that is rotated, a reference guide shaft that is provided parallel to the screw shaft, a driven member that is movably attached to the reference guide shaft in the axial direction, and a driven member that is formed on the driven member and that is screwed to the screw shaft. 1. A width guide device for a band-shaped material, comprising: a female threaded portion; a width guide movably attached to a reference guide shaft in the axial direction; and biasing means for pressing the width guide against a driven member. [Claim 2] A width guide device for a strip material having width guides in contact with both side edges of the strip material and moving these width guides in accordance with the width of the strip material, comprising: a motor; and a width guide device rotatable by the motor. a screw shaft that is rotated, a reference guide shaft that is provided parallel to the screw shaft, a driven member that is movably attached to the reference guide shaft in the axial direction, and a driven member that is formed on the driven member and that is screwed to the screw shaft. A female threaded portion, a width guide movably attached to the reference guide shaft in the axial direction, an urging means for pressing the width guide against the driven member, a sensor that detects the position of the width guide, and a position detection signal from this sensor. 1. A width guide device for a strip material, comprising: a control means for controlling a motor based on the following.