JPS6019635A - Recorder - Google Patents

Abstract

PURPOSE:To ease correction of meandering of a recording material by returning said material to a set conveyance route through separating a nip roller from a rotary drum. CONSTITUTION:In a device which records a recording material 1 while holding and conveying said material on a rotary drum 10, an energizing means 20, energizing a guide member 17, which guides both sides of the recording material 1, towards the center of a set conveyance position for the recording material 1, is provided. Further, nip rollers 12, 13, pressing the recording material 1 between said rollers and a rotary drum 10 which holds and conveys to a recording position said material 1 guided by a guide member 17, are separated from the drum 10 before or after the recording time of the material 1. If precision of fitting of a conveyance system is above a certain extent, correction can be easily made before the meandering quantity of the recording material is augmented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for recording while holding and conveying recording material on a drum, and particularly to a mechanism for correcting meandering of the recording material conveyed on the drum.

For example, a laser beam modulated by one image output signal is swung using a galvanometer mirror or a rotating polygon mirror to scan a recording material such as a photosensitive material or a thermosensitive material that is held and conveyed by being pressed by a nip roller onto a rotating drum. One of the essential conditions for a recording device is that the recording material passes through a set conveyance position without meandering.

Conventionally, drums and nip rolls were used to prevent meandering of the recording material conveyed on the drum once.

Needless to say, a high level of processing and mounting accuracy was required for each member of the conveyance system, including guide members such as guide rolls. Therefore, long hours of adjustment work were required to achieve mounting accuracy during adjustments during one assembly and when replacing parts during maintenance. Furthermore, the mounting accuracy often deteriorates with use, and readjustment is required each time.

If the recording material used in the recording device is short for each recording unit, it is sufficient that the meandering from the loading position to the recording position and further to the completion of recording at the recording position is within the permissible amount. In the case of shaku, the material is fed in succession and the amount of meandering is gradually accumulated, so accuracy is required so that the amount of meandering accumulated until the end of /roll is used is within the allowable amount.

An object of the present invention is to provide a recording apparatus having a function of correcting the amount of meandering of the recording material before it becomes large, provided that the mounting accuracy of the conveyance system is above a certain level.

The present invention has been made to achieve the above objects,
In an apparatus for distributing recording material while holding and conveying it on a rotating drum, a guide member that guides both sides of the recording material;
urging means for urging the guide member toward the center of a set recording material conveyance position; a rotating drum for holding and conveying the recording material guided by the guide member at the recording position; and the rotating drum. This recording apparatus includes a nip roller that presses a recording material between the recording material and a means for separating the nip roller from the drum before or after recording the recording material.

Hereinafter, the present invention will be specifically explained with reference to Examples.

FIG. 1 is a side view showing the main parts of the embodiment device. This embodiment device supplies recording material from a recording material supply magazine, etc.
Pull out roller vs. λ.

A pull-out motor that drives the roller pair λ3. A loop forming section DA pulls out a predetermined amount of recording material and makes it standby before starting recording, and a pull-out motor 3 detects a predetermined amount of loop.
a loop detector j that generates a signal to control the recording material l;
a guide roller z for guiding from the loop forming portion l;7. A meandering amount detector r that detects the position of the guided recording material l in the width direction; a rotating drum 10 that holds and conveys the guided recording material l to a recording position where it is irradiated by the recording beam. A recording motor 11 that rotates the rotating drum 10. 2. A roller roller that presses the recording material onto the rotating drum 10. i3. It consists of a solenoid /4I that separates the nip rollers /2-/3 from the rotating drum 10, and a cutter /j that cuts the rear end of the recorded material / at the recording position. Loop detector! consists of a light emitter and a light receiver that emit a light beam in a wavelength range that is not sensitive to the recording material l. The meandering amount detector is equipped with a light emitter and a light receiver that emit a light beam in a wavelength range that makes the recording material feel comfortable at positions outside the meandering tolerance range on both sides of the conveyance position of the recording material. A meandering signal is generated when the material I meanderes beyond the allowable amount. The guide rollers t and 7, as shown in the front view in FIG.
Flange that guides the side of /1. /1 and recording material l
Cylindrical part that supports and guides the edge of /7. /7, and is provided near the end of the roller shaft lr which is slidably passed through the guide roller 6, (7);
/l is a compression coil spring which always urges the guide roller % (7) toward the center position, 20. The end of the roller shaft/r is supported via a bearing. The nip roller saws are provided before and after the recording position of the rotary drum IO, and are urged in the direction of the rotary drum IO by a tension coil spring as shown in the figure.

When the solenoid 14t is energized, it resists the urging force of the tension coil spring and moves the nip roller/2. /J is rotating drum I
It is located away from O.

The recording material 1 is set in the conveyance system of the recording apparatus configured as described above, and the pull-out motor 3 is operated to drive the pair of pull-out rollers to pull out the recording material 1 from a recording material supply magazine (not shown). The drawn-out recording material l forms a loop in the loop forming portion, and when the loop detector j detects that a predetermined amount of loop has been formed, the operation of the drawing-out motor 3 is stopped. When setting recording material l in the conveyance system, energize solenoid l≠ and nip roller saw, /
J is separated from the rotating drum 10, but after setting, the current to solenoid ia is stopped and the nip roller saw /J is returned to its original position. Thereafter, when the recording motor // is activated, the rotary drum 10 rotates.

The recording material 1 being pressed against the rotating drum IO by the nip roller saw /J is fed to the recording position in a sub-scanning manner. On the other hand, the recording beam 1-muta irradiates the recording position in a main scanning manner, and scanning recording is performed on the recording material. Even after the recording beam irradiation ends, the recording motor /l continues to operate for a while, and stops after the recorded portion passes the cutter /j. After that, cutter/! is activated, and the rear end of the recorded recording material I is cut off. At this time.

In preparation for the next recording, the pull-out motor 3 operates again to pull out the recording material, but the meandering amount detector r
When the meandering signal is generated, the solenoid /l is energized, the nip roller saw 13 is temporarily separated from the rotating drum lθ, and the guide roller t is moved.

Due to the action of the compression coil springs 20, 20 which urge the recording material 7 toward the center of the transport position, the recording material is guided by the flanges it, it and returned to the set transport position, and the drum rotates once. The meandering of the recording material l on the IO is corrected.

In the above embodiment, guide members for guiding both sides of the recording material are provided on the guide roller 4.7 itself as flanges it, but a guide plate, for example, may be provided separately from the guide roller. Further, in the above embodiment, the biasing means is provided so as to always bias the guide member toward the center of the conveyance position, but it may be provided so as to act only when correcting meandering.

Furthermore, in the above embodiment, a meandering amount detector t is provided,
Nip roller only when the meandering signal is being generated/2. /
Although the meandering is corrected by separating the nip rollers ix and i3 from the rotating drum IO, the meandering may be corrected by separating the nip rollers ix and i3 from the rotating tram IO before or after each recording. In the above embodiment, the nip roller/
Although the solenoid /l was used to separate l/J from the rotating drum io, any known mechanism may be used, such as operating a motor to rotate a cam.

As described above, in the present invention, the recording material is returned to the set conveyance path by separating the nip roller from the rotating drum. Therefore, if the installation accuracy of the conveyance system is above a certain level, meandering of the recording material can be avoided. This can be easily corrected before it becomes too large.

[Brief explanation of drawings]

FIG. 7 is a side view of the main parts of the embodiment apparatus, and FIG. 1 is a front view of the guide roller. /... Recording material, t, 7... Guide roller, IO...
・Rotating drum, /λ=I! ...Nip roller. /G...Solenoid, /4...Flange. 20... Compression coil spring. Patent applicant Fuji Photo Film Co., Ltd. - Figure 1 Figure 2

Claims (1)

[Scope of Claims] l) An apparatus for recording while holding and conveying a recording material on a rotating drum, which includes a guide member that guides both sides of the recording material, and a center of the conveyance position of the recording material at which the guide member is set. a rotating drum that holds and conveys the recording material guided by the guide member to a recording position; a nip roller that presses the recording material between the rotating drum; and a nip roller that presses the recording material between the rotating drum and the nip roller. and means for separating the recording material from the drum before or after recording. -2) The recording apparatus according to claim 1, wherein the guide member is a rotating body having flanges on both sides. 3) The recording apparatus according to claim 7, wherein the biasing means constantly biases the guide member.