JPH0423875Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Technical Field of the Invention" This invention is a conveyance system for recording media that can be written with laser light, such as 16 mm film, when the recording medium is initially set on the platen for laser light exposure. The present invention relates to a slack removal mechanism for a recording medium transport system that removes the slack of the recording medium that occurs and prevents the optical system from being out of focus or from jamming.

``Technical background of the invention'' The above-mentioned recording method using a recording medium capable of writing with laser light has a dramatically increased writing density compared to the conventional recording method using photo development on 16 mm film. In addition, it is very meaningful because a clear recording state with high resolution and good recording quality can be obtained.

The above recording method also uses a 16 mm film and performs writing with a laser beam within the transport system. During this writing, unless very precise control is performed on the transport speed and positioning from the light source, the focus of the optical system will shift.
Therefore, a platen whose rotational speed can be precisely controlled is used, and writing is performed with a laser while the continuous recording medium made of the 16 mm film is brought into close contact with the platen.

"Problems with Background Art" In the recording medium conveyance system described above, at least one pair of pressing rollers are provided in contact with the platen before and after the printing position on the recording medium on the platen,
A continuous sheet-like recording medium is forcibly conveyed by a pressure roller to bring the recording medium into close contact with the platen.

However, when such a continuous recording medium is manually set in the conveyance system, the recording medium is likely to sag, especially in the platen section provided with the plurality of pressure rollers. Moreover,
If the platen is started with some slack in the recording medium on the platen, the slack will not be absorbed and the recording medium will continue to be conveyed. In such a case, the sagging phenomenon causes jamming and feed irregularities in the recording medium.

``Purpose of the invention'' This invention aims to solve the problem of the above-mentioned continuous recording medium conveyance system, in which a recording medium is generated when the recording medium is initially set on the platen in a recording medium platen section equipped with a plurality of pressing rollers. The purpose of this is to absorb the slack of the platen and bring the recording medium into close contact with the platen.

In order to achieve the above object, this invention uses a solenoid or the like to release a plurality of pressure rollers in a continuous recording medium conveyance system for a certain period of time, thereby bringing the recording medium into close contact with the platen. It is something that makes you

"Example" In FIGS. 1 and 2 showing an example of this invention, A is a 16 mm
A recording device using a printing method using a laser beam for FICHM, B is a control device equipped with a display C and a keyboard for reading information from an optical disk.

The recording apparatus A is equipped with a cassette-type case 2 that winds up a continuous recording medium 1 made of positive raw film. And recording medium 1 is
Deflection rolls 4 and 5 that form a deflection 3 of a predetermined width after being pulled out from the case 2, a platen 6 that rotates at a low and constant speed to advance the recording medium 1 as described above, and a deflection 7 of a predetermined width again formed. The deflection imparting rolls 8 and 9, and then the recording medium 1
A developing drum 10 heated to 10 to 120°C, followed by a density sensor 1 for controlling image density.
1. The reel section 13 or jacket section 1 is cut through the cutter 12 that cuts the recording medium 1 as necessary.
It is sorted into 4. Reference numeral 15 denotes an optical system for writing information read from an optical disk by the control device B onto the recording medium 1, which is conveyed in close contact with the platen 6, with a laser beam.

In such a recording apparatus, as shown in FIG.
The main point is to improve the adhesion of the recording medium 1 to the platen 6, which is equipped with a platen 6.

The platen 6 is driven by a main shaft motor (not shown) such as a stepping motor. The platen 6 is equipped with pressing rollers 21 and 22 above and below the printing surface, that is, the irradiation position of the laser beam on the recording medium 1 for writing information, so that the recording medium 1 is accurately conveyed at a constant speed to the printing surface. It is driven by a spindle motor so that the

Then, the slack 2 of the recording medium 1 on the platen 6
In order to remove the pressure roller 9, a release mechanism is attached to one of the pressing rollers 21 to separate it from the surface of the platen 6. That is, the pressing roller 21 is attached to the shaft 23 via an arm 24 of a predetermined length, and the arm 24 is made swingable about the shaft 23. Further, a lever 25 for swinging is provided protruding from the side surface of the arm 24 at right angles to its length direction, and a bracket 26 is attached to the tip of the lever 25. A solenoid 27 that moves forward and backward toward the bracket 26 is attached to the position where it contacts the bracket 26. When the solenoid 27 moves forward and pushes the bracket 26, the arm 24 swings and presses away from the surface of the platen 6. The roller 21 is pulled off along a trajectory 28 as shown.

Then, when the main shaft motor is started, the solenoid 27 is started at the same time, and the bracket 2 is operated for a certain period of time.
After continuing to press 6, the solenoid 27 is stopped and the pressing roller 21 is returned to its original position. Thereafter, the optical system 15 is started to perform printing using laser light.

In such a configuration, the slack removing mechanism of this invention operates as follows.

At the same time as starting the main shaft motor and starting rotation of the platen 6, the solenoid 27 is always energized and turned on for a certain period of time (about one second) before printing by laser light. The solenoid 27 releases the pressing roller 21 via the bracket 26. During this time, the slack 29 of the recording medium 1 generated on the platen 6 due to manual setting is absorbed by conveying the recording medium 1 by the rotation of the platen 6 and the pressure roller 22. Thereafter, the solenoid 27 is turned off, the pressure roller 21 is brought into contact with the platen 6, and the recording medium 1 is conveyed to perform predetermined printing and development.

Although one embodiment of this invention has been described above, this invention is not limited to the embodiment applied to the 16 mm film. This is effective in absorbing slack in continuously conveyed recording media that occurs when various recording media are initially set in the conveyance system.

"Effects of the invention" As explained above, this invention provides the following effects.

(a) By absorbing the slack of continuous recording media at the platen portion, it is possible to prevent the occurrence of jams in the conveyance system.

(b) By keeping the recording medium in close contact with the platen at all times, uneven conveyance of the recording medium can be minimized and a clear recording state can be obtained.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams for explaining one embodiment of this invention. Figure 1 is a perspective view showing the overall configuration of equipment including a recording device to which this invention is applied, and Figure 2 is a recording device. FIG. 3 is an enlarged view of the main parts thereof. 1...recording medium, 2...cassette case, 3...
...Deflection, 4, 5... Deflection imparting roll, 6...
Platen, 7... Deflection, 8, 9... Deflection imparting roll, 10... Developing drum, 11... Density sensor, 12... Cutter, 13... Reel section, 14
... Jacket part, 15 ... Optical system, 21, 22
... Pressing roller, 23 ... Shaft, 24 ... Arm, 25 ... Lever, 26 ... Bracket, 27
...Solenoid, 28...Arm trajectory, 29...
...sagging.

Claims (1)

[Scope of utility model registration request] It has a platen that conveys a continuous recording medium, and a plurality of pressing rollers that come into contact with the platen via the recording medium, and is provided with a release mechanism that separates at least one pressing roller from the surface of the platen. Also, a slack removing mechanism for a recording medium transport system, characterized in that activation of the platen and activation of the release mechanism are linked.