JPS6317763A - Conveying mechanism for roll-form recording medium - Google Patents

Abstract

PURPOSE:To make an exposed recording medium so as not to be drawn out of a winding magazine, by cutting off the recording medium for a laser printer or the like completely according to a detection signal out of a rotation detecting sensor, and judging whether the cutting operation is proper or not in a short time at a control part. CONSTITUTION:Conveyance of a recording medium 17 is carried out by loading rollers 23 and 24, but after a tip part of the recording medium 17 arrives at a main roller 30, it is carried out by this main roller 30. Here, while the recording medium 17, where a driven roller 36 is made contact, is moving, the this driven roller 36 continues its rotation. But, if the recording medium 17 is completely cut off by a cutter 26, rotation of the driven roller 36 also comes to a stop and pulse output out of a rotation detecting sensor 38 is stopped as well. Accordingly, a control part judges whether the cutting operation is proper or not from a signal out of the sensor 38, informing an operator of it with a proper way. The cut recording medium 17 is wound on a winding magazine 31 after the elapse of the specified time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transport mechanism for a roll recording medium in a laser printer or the like.

(Background of the Invention) One type of laser printer is one that is configured to perform photosensitive recording by irradiating a scanning light beam modulated with a print signal onto a roll-shaped photosensitive recording medium.

FIG. 3 is a block diagram of the main parts of such a laser printer. In FIG. 3, 1 is, for example, a He--Ne laser light source. The output beam of the light source 1 is passed through a neutral density filter 2
→Acousto-optic modulator (acOUstooptic mod
u-1ator ;hereinafter abbreviated as 〇M) Lens 3-AO
M4 → Mirror 5 → Beam expander (beam ex
pand-er; hereinafter abbreviated as BE) 6 → pinhole 7 →
Cylindrical lens (cylindrical 1e
ns (hereinafter abbreviated as OL) 8→mirror 1O-BE11→mirror 12, enters the rotating polygon mirror 13, and is reflected as a scanning light beam. The scanning light beam reflected by the rotating polygon mirror 13 is passed through a condensing lens 14, which is an fθ lens. The light enters the photosensitive roll-shaped recording medium 17 via Cu2S and the shutter 16. On the other hand, CuI
A mirror 18 is located near the scanning end between 2 and the shutter 16.
is disposed, and the scanning light beam reflected by the mirror 18 is reflected by the mirror 19 and enters the light receiving element 2o. The light receiving element 2o outputs a horizontal synchronization signal.

By the way, in such a laser printer, a cutter is installed on the conveyance path to cut the recording medium 17 according to a command signal, and after photosensitive recording, the recording medium 17 is cut to a required length and wound up. It will be stored in the magazine. The cutter is configured to cut, for example, from the left end to the right end in the width direction of the recording medium 17, and to return to the initial state when the take-up magazine is removed from a predetermined mounting position.

(Problems to be Solved by the Invention) However, according to such a conventional configuration, the recording medium 17
Since the recording medium 17 is photosensitive, it is not possible to visually confirm whether or not the recording medium 17 has been properly cut by the cutter. For this reason, if you remove the take-up magazine with the recording medium 17 still uncut, thinking that the recording medium 17 has been cut normally, a portion of the photosensitive-recorded recording medium 17 already stored in the take-up magazine will be removed. There is a possibility that it will be pulled out and the entire surface will be exposed.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to realize a transport mechanism that can determine whether the cutting operation is good or bad within a short time after the cutting operation of the recording medium is performed.

(Means for Solving the Problems) The present invention, which solves the above problems, includes a loading roller that pulls out an unrecorded roll-shaped recording medium stored in a supply magazine and sends it to the recording section, and a loading roller disposed near the recording section. a main roller that feeds the recorded roll-shaped recording medium to the take-up magazine side; a cutter that is disposed near the loading roller that cuts the roll-shaped recording medium according to a control signal; and a cutter that is disposed upstream of the cutter. The device includes a driven roller that rotates as the rolled recording medium moves, and a rotation detection sensor that detects whether or not the driven roller rotates, and determines whether the cutting operation of the rolled recording medium is good or not according to a detection signal from the rotation detection sensor. It is characterized by determining.

(Function) According to the present invention, the quality of the cutting operation of the recording medium can be determined within a short time after execution of the cutting operation, based on the presence or absence of rotation of the driven roller.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a configuration diagram showing the mechanical configuration of an embodiment of the present invention, and the same parts as in FIG. 3 are given the same reference numerals, and their re-explanation will be omitted. In FIG. 1, 21 is a supply magazine in which an unexposed recording medium 17 is stored. A vapor end sensor 22 detects the end of the recording medium 17, and is disposed near the outlet of the supply magazine 21. 23
．． Reference numeral 24 denotes an 0-ding roller that pulls out the unexposed recording medium 17 stored in the supply magazine 21 and sends it to the photosensitive recording section side. The loading roller 23.24
is connected to the loading motor 25 via a one-way clutch (not shown). 26 is an auto cutter that automatically cuts the recording medium 17 according to a command signal, and is disposed downstream of the loading row 523. still,
Cutter sensors for controlling the reciprocating motion of the blade of the autocutter 26 are disposed at both ends of the autocutter 26, but are not shown. 27 is a loading roller 24
This is a turn roller that bends the conveyance direction of the recording medium 17 sent out through the turn roller approximately at right angles. A jam sensor 28 is arranged near the turn roller 27. A media bus sensor 29 is arranged upstream of the photosensitive recording section and detects the presence or absence of the recording medium 17. A main row 30 is disposed near the photosensitive section and feeds the recording medium 17 on which photosensitive recording has been performed to the pickup magazine 31 side. The main roller 30 is rotationally driven by a main motor 39.

32 is arranged on the downstream side of the main roller 30 and the recording medium 1
This is a loading sensor that detects the presence or absence of 7. A manual cutter 33 that cuts the recording medium 17 by manual operation is disposed between the loading sensor 32 and the take-up magazine 31.

As described above, the recording medium 17 that has undergone photosensitive recording is wound and stored in the winding magazine 31 . A take-up sensor 34 is disposed near the take-up shaft of the take-up magazine 31. Further, the winding magazine 31 is removably disposed at a predetermined position, and a magazine sensor 35 detects the wear state. 36 is a driven roller that rotates as the recording medium 17 moves. A code plate 37 that rotates integrally with the driven roller 36 is attached to the rotation shaft of the driven roller 36. A sensor 3 is located near the periphery of the code plate 37 and generates a pulse according to the rotation of the driven roller 36.
8 are arranged.

FIG. 2 is a diagram showing only the main parts of the electrical configuration of the embodiment shown in FIG. 1, and parts corresponding to those in FIG. 1 are given the same reference numerals. In the figure, 40 is a control unit that performs various controls, and is composed of a microcomputer or the like. The control unit 40 receives signals from various sensors such as the rotation detection sensor 38 and two media bus sensors, and controls the driving of a 25° loading motor, three main motors, the shutter 16, and the like.

In such a configuration, the recording medium 17 is transported by, for example, the loading rollers 23 and 24 until the leading end of the recording medium 17 reaches the main roller 30, but after the leading end of the recording medium 17 reaches the main roller 30, is performed by the main roller 3o. Here, the driven roller 36 is
Regardless of the conveyance by the loading rollers 23 and 24 and the conveyance by the main roller 3°, the recording medium 17 that is in contact with the driven roller 36 is rotating while it is moving.

Therefore, while the recording medium 17 is moving without being cut, the sensor 38 outputs a pulse signal corresponding to the rotation of the code plate 37. However, when the recording medium 17 is completely cut by the cutter 26, the movement of the recording medium 17 that is in contact with the driven roller 36 stops, and the rotation of the driven roller 36 also stops, causing the sensor 38 to stop moving. Pulse output will also stop.

Therefore, the control unit 40 determines the quality of the cutting operation of the recording medium 17 based on the presence or absence of a pulse signal from the sensor 38 in the conveyance state after the cutting operation of the recording medium 17 is performed, and notifies the operator by appropriate means such as a display. If the display indicates that there is no abnormality in the cutting, the cut recording medium 17 will be wound into the winding magazine 31 after a predetermined period of time, so even if the winding magazine 31 is removed, photosensitive recording will still be completed. The recording medium 17 is never pulled out from the take-up magazine 31. On the other hand, if the recording medium 17 is not cut, the cutter 26 may be activated again, or the recording medium 17 may be cut with the manual cutter 33-.

In the above embodiments, a photosensitive recording medium has been described, but it is also useful as a transport mechanism for ordinary recording paper, for example.

Further, the rotation detection front groove of the driven roller is not limited to a combination of a code plate and a sensor, and for example, a magnetic detection front bridge may be used.

(Effects of the Invention) As explained above, according to the present invention, the recording medium can be
! It is possible to realize a conveyance mechanism that can determine the quality of the cutting operation within a short period of time after performing the l'i operation.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing the mechanical configuration of an embodiment of the present invention;
FIG. 2 is a block diagram showing the main parts of the electrical configuration of the embodiment shown in FIG. 1, and FIG. 3 is a block diagram of a laser printer suitable for using the present invention. 17... Recording medium 21... Supply magazine 23
．． 240-Ding roller 26...Cutter 30...Main roller 31
... Winding magazine 36 ... Followed roller 37 ...
Code plate 38...Rotation detection sensor 40...Control unit Patent applicant Roku Konishi Photo Industry Co., Ltd. Agent Patent attorney Fuji Ijima 1 person

Claims (1)

[Claims] a loading roller that pulls out an unrecorded roll-shaped recording medium stored in the supply magazine and sends it to the recording unit side;
A main roller disposed near the recording section and feeding the recorded rolled recording medium to the winding magazine side; a cutter disposed near the loading roller that cuts the rolled recording medium according to a control signal; and the cutter. The roller includes a driven roller that is disposed upstream of the recording medium and rotates as the rolled recording medium moves, and a rotation detection sensor that detects whether or not the driven roller rotates. A conveyance mechanism for a roll-shaped recording medium, characterized by determining whether the cutting operation of the recording medium is good or bad.