JPH012957A - Image forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to an image forming apparatus such as a copying machine, a printing machine, or a laser beam printer. The present invention relates to an image forming apparatus including a manual feed guide.

(B) Prior Art Conventionally, an operator places a manual feed sheet on a manual feed tray and manually moves a manual feed guide along the edge of the manual feed sheet.

←→ Problems to be Solved by the Invention By the way, in the above-mentioned image forming apparatus, the manual feed guide and the guide are moved manually, so it is troublesome to move the manual feed guide. There were times when I forgot to do so and the sea) went diagonally.

(C) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and includes a manual feed tray, a reference position detection means for detecting a reference position of a manual feed guide, and a manual feed tray. Uphill)
・A sheet that detects the presence or absence of a sheet) ・A sheet that detects the presence or absence of a sheet and a sheet that detects the edge of the sheet! one end detection means, and a drive means for moving the manual feed guide closer to the width based on signals from the reference position detection means, the sheet presence/absence detection means, and the sheet edge detection means. It is something to do.

(E) Operation Based on the above-mentioned configuration, when the operator places a sheet on the manual feed tray A, the sheet 1 is detected by the sheet presence/absence detection means, and the sheet is driven based on the signal from the sheet presence/absence detection means. The means moves the manual feed force side toward the width until the sheet edge detection means detects the edge of the sheet. As a result, the sheet L- is placed along the manual feed guide, and is fed along the manual feed guide. Then, when the sheet presence/absence detection means detects that there are no more sheets on the manual feed tray, the manual feed guide is moved toward the width by the drive means until it is detected by the reference position detection means and positioned at the reference position. .

← Example Embodiments of the present invention will be described below along with the drawings.

As shown in FIG. 2, the copying machine 1 has a main body 3 containing a copying section 2, and the main body 3 has a platen 5, a platen 5,
It is equipped with a cassette 15 that stores a light source 6, mirrors 7.8, 9, 10° 11.12, a lens 13, and a sheet S.
A paper feed roller 16 is disposed above the cassette 1-15. A manual tray 17 is attached above the cassette 15, and the manual tray 17 has a paper feed roller 19 connected thereto. Second, the paper feed roller 16
A register 1 and a pair of rollers 21 are disposed downstream of the roller 21, and the image forming section 2 is disposed downstream of the roller 21. Further, the image forming section 2 has a cylindrical photosensitive drum 20, and around the drum 20, -
A secondary phase electric device 21, a transfer charger 22, a transfer charger 25, and a cleaner 26 are disposed.A conveyance section 27 is disposed downstream of the image forming section 2. I,
A fixing device 29 is disposed downstream of the η feeding section 27. Further, a discharge roller 30 is disposed downstream of the fixing device 29, and a paper discharge tray 31 is provided downstream of the roller 30 so as to protrude from the side of the body 3.

Further, as shown in detail in FIG. 1, the manual tray 17 is composed of a side plate 17a and a bottom plate 17b, and a manual feed guide 32 movable in the directions of arrows A and B is disposed on the bottom plate 17b. ing. The manual feed guide 32 is configured to be moved by a moving means 45 (see FIG. 3), for example, a rank and pinion.
A sheet end detection switch 33 is provided at each of the leading and trailing ends. Further, a home position switch 35 for detecting the home position :I:/ of the manual feed guide 32 is disposed on the side plate 17a, and a sheet 7,36 switches are installed to detect the presence or absence of S.

Then, as shown in FIG.
The control section 37 is connected to the home position switch 35, the switch 33, and the switch 1 to the presence/absence switch via an input interface 71 (not shown). 36, no) - selection key 39 and start key 40 are connected, and not shown)
A main motor 41, a forward clutch, a clutch 42, and a reverse clutch 43 are connected via an output interface. Further, a driving means 45 for the manual guide 32 is connected to the notches 42 and 43, so that the manual guide 32 can be moved.

Next, the operation of this embodiment will be explained with reference to the 11th day-chard in FIG.

After operation, when the copying machine's power source I, , :J- is turned on (Sl), the control unit 371. i, n-
-1, Hoshin.

Switch 35 is ON! If the switch 35 is OFF (S2), the main motor 41 is turned on and the reverse operation is started. 43 and move the manual feed guide 32 in the direction of the arrow (S3). F, home positive. / When the switch 35 is ON, the control section 37 turns the main mask 41 OFF.
At the same time, the rear at7→) 43 is cut and the movement of the manual feed force guide 32 is stopped by 1-z (S4). Then, the control unit 37 determines whether the start key 40 is in the ON state (S5), and if the start key 40 is in the ON state, the control unit 37 determines whether the mode input from the input unit (not shown) is the manual feed mode. (S6). Then, when the control unit 37 determines that it is not the manual feed mode, the control unit 37 changes the instructed mode F.
(S17), and if it is determined that the mode is manual feed mode, it is determined whether or not N~l-S is placed on the manual feed tray 17 based on the signal from the sheet presence/absence switch 36.
Cut lJ (S7). At this time, the presence/absence switch 3
6 is OFF, that is, manual feed! - If it is determined that there is no sheet S on the sheet 17, the control unit 37 turns the -1 key to 0FFj to put the copying machine 1 into a standby state (316). In addition, when it is determined that there is a sheet +-S on the manual feed tray 17 and the sheet 36 is in the ON state, the control unit 37 turns the main motor 41 ONj, (S8),
Furthermore, the forward movement 42 is connected and the manual feed guide 32 is moved in the direction of arrow B (S9). Then, the control unit 37 determines whether the one end detection switch 33 of the sea 1 on the base end side of the tray 17 is in contact with the sea +-S end (510), and determines that the switch 33 is ON. If so, it is determined whether the sheet detection switch 33 of the tray 17 is in the ON state (Sll). At this time, if the control unit 37 determines that the switch 33 is in the ON state, the control unit 37 disconnects the forward clutch 42 and moves the manual feed guide 33
The movement is stopped (312). This allows the sea l-
S is placed along the manual feed guide 32 and is conveyed along the guide 32 without being skewed. Then, the control unit 37 reads the image of the original placed on the platen 5 using the mirror 6, mirror 7, 8, 9, 10, 11, 12 and lens 13, and forms an image on the image forming unit 2. On the other hand, the sheet S placed on the manual feed tray 17 is fed by the paper feed roller 19 to a pair of registration rollers 21, and is conveyed by the pair of rollers 21 in synchronization with the image formed on the photosensitive drum 20. Then, the sheet S
The image on the photosensitive drum 20 is transferred by the transfer charging mold 25 (S13), and further conveyed to the fixing device 29 by the stripping section 27. Then, the sheet 1-3 is connected to the fuser 29
f314), the image is fixed and the paper is discharged onto the paper discharge tray 31 by the discharge roller 30, thereby completing a series of operations in the manual feed mode f314). Then, the control unit 37 determines whether or not the work has been completed based on a discharge sensor (not shown), and if it is determined that the work has been completed, the sheet 1-S is placed on the manual feed tray 17 based on the signal from the sheet presence/absence switch 36. 515), and if it is determined that there is no l-s on the tray 17, the process continues until the start key 40 is pressed.
The TV camera 1 is placed in a standby state. When the sheet presence/absence switch 36 is OFF, the control section 37 connects the reverse clutch 43, moves the manual feed guide 32 in the direction of arrow A until the home position switch is turned ON, and then puts the copier 1 into a standby state. shall be.

(g) As described in detail, according to the present invention, the manual feed tray includes:
A base position detection means for detecting the reference position of the manual feed guide, a sheet presence/absence detection means for detecting the presence or absence of the sheet on the core insert tray, and a sheet edge detection means for detecting the edge of the sheet. and the reference position detection means;
Since a drive means is provided for moving the manual feed guide closer to the width based on a signal from the sheet presence/absence detection means and the sheet presence/absence detection means, the drive means can move the reference position detection means,
Based on the signals from the sheet presence/absence detection means and the sheet edge detection means, the manual feed guide can be moved closer to the width, eliminating the need to manually move the manual feed guide. It is possible to eliminate skewed feeding of sheets due to forgetting.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a manual feed tray according to the present invention. FIG. 2 is a front view showing the image forming apparatus according to the second embodiment of the present invention. Further, FIG. 3 is a block diagram showing the control section. Furthermore, FIG. 4 is a flowchart 1 showing the operation of the present invention. 1 Image forming device, 17 Manual feed tray, 32
Manual feed guide, 33 - Sheet edge detection means,
35-Reference position detection means, 36-Sheet presence/absence detection means, 45-Driving means, S rate.

Claims (1)

[Claims] (1) In an image forming apparatus including a manual feed tray on which a pick-up sheet is placed and a movable manual feed guide disposed on the manual feed tray, the manual feed tray has a reference position for detecting a reference position of the manual feed guide. A detection means, a sheet presence/absence detection means for detecting the presence or absence of a sheet on the manual feed tray, and a sheet edge detection means for detecting the edge of the sheet, and the reference position detection means, the sheet presence/absence detection means are provided. An image forming apparatus comprising: a drive means for moving the manual feed guide closer to the width based on a signal from a detection means and the sheet edge detection means.