JPH0517131B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention provides for copying machines, facsimile machines, etc.
The present invention relates to a device that can automatically position stacked sheets such as originals or papers at predetermined positions.

[Prior art]

Japanese Unexamined Patent Publication No. 1983-1999 discloses a device that can automatically position stacked copy sheets on the fixed front wall and fixed side wall of a rectangular parallelepiped tray with an open top surface.
There is one described in Publication No. 202560. As shown in FIGS. 1 and 2, as described in Japanese Patent Application Laid-Open No. 57-202560,
A reciprocating rear fence 03 is provided at a position facing the fixed front wall 01, and a reciprocating side fence 04 is provided at a position facing the fixed side wall 02, and the rear fence 03 and side fence 04 are driven by a motor 05. The motor 0 is screwed into a rear fence feed screw rod 08 and a side fence feed screw rod 09 which are connected via a clutch 06 and a gear 07, respectively.
5, the rear fence 03 and the side fence 04 can reciprocate. In addition, the rear fence 03 and the side fence 04 are equipped with a reflective rear end detection first photo sensor 01 in which a light emitting element and a light receiving element are paired and face upward.
0 and a second photo sensor for reflective one side edge detection 0
11 are respectively attached thereto, and a reflective type third photo sensor 012 for detecting the front edge and a fourth reflective type photo sensor 013 for detecting the other side edge are attached below the fixed front wall 01 and the fixed side wall 02, respectively. . And rear fence 03 and side fence 0
Clutch 06 with laminated paper 014 placed on tray 00 at the home position where 4 and 4 are farthest from fixed front wall 01 and fixed side wall 02, respectively.
If the laminated paper 014 is brought into contact with the fixed front wall 02 when the motor 05 is rotated in the normal direction by connecting the Photo sensor 010,01
1 does not operate, and the motor 05 continues to rotate in the normal direction to drive the rear fence 03 and side fence 04.
moves forward and when the rear fence 03 and side fence 04 hit the edge of the stacked paper 014, the first and second photo sensors 010 and 011 operate,
Clutch 06 is in the disconnected state, and the rear effect is 0.
3 and side fence 04 are designed to stop. In addition, when the laminated paper 014 is placed on the tray 00 away from the fixed front wall 01, fixed side wall 02, rear fence 03, and side fence 04,
1st, 2nd, 3rd, 4th photo sensor 010,0
11,012,013 do not work together, and when the rear fence 03 and side fence 04 move forward,
Laminated paper 014 is fixed front wall 01, fixed side wall 02,
When sandwiched between the rear fence 03 and side fence 04, the first, second, third, and fourth photo sensors 010, 011, 012, 013 all operate, and the rear fence 03 and side fence 0
4 was coming to a halt.

[Issue to be solved]

In the conventional apparatus shown in FIGS. 1 and 2,
First and second photo sensors 010, 01 are installed on the moving rear fence 03 and side fence 04.
1, the structure becomes complicated, increases cost, and is prone to malfunction. Furthermore, since the tray 00 is in a horizontal position, the frictional force between the bottom of the tray 00 and the laminated paper 014 increases, causing the laminated paper to 0
There was a risk that wrinkles would occur when the 14 was moved.

[Means and effects for solving the problem]

The present invention relates to an improvement of a new automatic positioning device for laminated sheets to overcome such difficulties, and includes a laminated sheet supporting means whose supporting surface is inclined upward with respect to a horizontal plane along the sheet conveyance direction; an edge abutment piece that is oriented in a direction perpendicular to the inclination direction of the support surface in the lower half of the support surface of the stacked sheet support means and that is movable reciprocally along the inclination direction; a collision piece lower limit detection means for detecting a state in which the edge collision piece is located at the lower limit; and an upper end provided above the support surface of the laminated sheet supporting means and capable of detecting the upper edge of the laminated sheet. an edge detection means; a collision piece driving means for reciprocating the edge collision piece along the inclination direction of the support surface; and a collision piece drive means for moving the edge collision piece located at the lower end of the support surface to a start switch The collision piece driving means is operated so as to be moved upward by an operation, and then the operation of the collision piece driving means is stopped by a detection signal from the upper edge detection means, and the operation of the collision piece driving means is stopped by a detection signal from the upper edge detection means. control means for operating the impact piece driving means in the opposite direction when the collision piece is exhausted, and then stopping the operation of the impact piece driving means in response to a detection signal from the impact piece lower limit detection means. This is a characteristic feature. Since the present invention is configured as described above,
When stacked sheets are placed on the support surface of the stacked sheet support means, the inclination of the support surface tends to push them against the edge abutment piece. When the start switch is operated in this state, the impact piece drive means is operated by the control means.
The front edge abutting piece rises. Further, as the front edge abutment piece rises, the stacked sheets on the support surface move upward, and the upper edge detection means stops, and the stacked sheets are stacked with the edge abutment piece. The sheet remains stationary in its position. When the stacked sheet support means on the support surface are discharged one after another, the front upper edge detection means detects this, and the front impact piece driving means is moved in the opposite direction by the control means. When the edge abutting piece moves down and reaches the lower limit, the abutting piece lower limit detection means operates to stop the edge abutting piece at that position, and the edge abutting piece is laminated. The sheet is now ready to be placed on the support surface. In this way, in the present invention, the stacked sheets can be automatically set at the required paper feeding position simply by placing the stacked sheets on the support surface and operating the start switch. First, when there are no more stacked sheets on the support surface, the edge abutment piece automatically descends, making it possible to cut the stacked sheets onto the support surface. In addition, in the present invention, since both the front impact piece lower limit detection means and the upper edge detection means are provided in the fixed part, the structure is simple and the cost is low, and failures are less likely to occur, resulting in reliability and durability. is high. Furthermore, in the present invention, since the supporting surface is inclined,
The contact force of the laminated sheet against the support surface is lowered, resulting in less friction, and when the laminated sheet moves as the edge strip rises, it can move smoothly against the support surface, and wrinkles can be prevented. It can be prevented before it happens.

【Example】

The following is a third example in which the present invention is applied to a paper feeding device of a copying machine.
The embodiment shown in FIGS. 8 through 8 will be described. Reference numeral 1 denotes a paper set tray that faces the paper feed direction Y and is inclined diagonally upward. On the back side of the tray 1, side guides 2 and 3 are arranged parallel to the paper feed direction Y, and the width of the tray 1 is A long hole 4 is formed in the center of the direction parallel to the paper feeding direction Y. Further, a two-phase induction motor M is installed below the paper set tray 1, and the rack 6 is connected so that the rack 6 meshes with a gear 5 that is integrated with the rotating shaft of the motor M.
When the fixing pin 8 is fitted into the groove 7 of the rack 6, the connecting bar 9 integrated with the rack 6 is fitted into the elongated hole 4, and a back guide, which is an edge abutting piece, is attached to the upper end of the connecting bar 9. 10 are fixed together, and these members constitute a collision piece driving means, and the back guide 10 is reciprocated along the elongated hole 4 and the groove 7 along with the rack 6 by forward and reverse rotation of the motor M. I'm getting used to it. Further, a fine hole 11 is provided at the paper leading edge set position x in the paper set tray 1, and the fine hole 1
A reflective optical sensor PS, which serves as a means for detecting the upper edge of the paper, is installed directly below the sheet
If paper 12 does not exist in the same sensor PS
The same sensor, if present, has no output.
Output is now being sent from the PS. Furthermore, a limit switch LS is provided behind the rack 6 as a means for detecting the lower limit of the contact piece.
When the back guide 10 retreats to the rearmost position,
The rear end of the rack 6 contacts the movable piece of the limit switch LS, so that the limit switch LS can be operated. Next, the control circuit which is the control means of this embodiment will be explained with reference to FIGS. 6 to 8. For the reflective optical sensor PS, the output terminal of the Schmitt trigger circuit ST is a flip-flop circuit FF.
One input terminal of the sensor is connected to the first relay _X1 , and the Schmitt trigger circuit ST outputs only when the output of the reflective sensor PS is above a certain level. In addition, the limit switch B contact 1s is connected to the capacitor C, resistor R, and diode D in the DC power supply.
It is interposed in the differential circuit DI, which consists of a
A pulse signal is output to the other input terminal of the flop FF. Furthermore, the output terminal of the flip-flop circuit FF is connected to the _second relay
It is designed to be reset by ST output. Furthermore, in the power supply circuit _of the _third relay and when the start push button switch PB is pressed, the _third relay
is operated, and is returned to the non-operating state by the operation of the first relay _X1 . In addition, the two-phase induction motor M has a main winding W _M and an auxiliary winding.
W _A , and the main power supply circuit is equipped with 3 third relay A contacts, and the forward/reverse inversion circuit is equipped with a second relay A contact x ₃ .
If relay contacts x ₂ are interposed and the third relay X ₃ does not operate, the motor M is stopped and the third relay
When the second relay _X2 is not activated while the relay _X3 is activated, the motor M is reversely rotated. Since the embodiment shown in FIGS. 3 to 8 is configured as described above, when the back guide 10 is retracted to the rearmost position, the trailing edge 12 of the sheet 12 is
b is brought into contact with the back guide 10, the paper 12 is placed on the paper set tray 1, and the start push button switch PB is turned on for a certain period of time (see T1 in Figure ₉ ), the _third relay (See T ₂ in Figure 9). In this state, the second relay _X2 is turned on, so as shown in FIG. be advanced. When the leading edge 12a of the paper 12 reaches the top of the pore 11 (see _T3 in Figure 9), the reflective optical sensor PS
Since _the output is transmitted from the first relay X _{1 and} the first relay The edge 12a is aligned with the paper leading edge set position x. At the same time, the flip-flop circuit F is reset by the output of the reflective photosensor PS, and the second relay _X2 is returned to the OFF state. In this paper alignment state, the paper 12 on the paper set tray 1 is loaded by a paper feeder (not shown).
are carried out one by one, and when the same paper 12 runs out (9th
(See Figure _T4 ), the reflective optical sensor PS becomes inactive, the first relay _X1 is returned to the inactive state, and the B contact _x1 of the power circuit of the third relay _X3 is turned on. At this time, the b contact limit switch 1s is inactive and in the on state, so the third relay _X3 operates again, but the second relay _X2 is in the off state, so the motor M reverses and the back guide 10 fall back. Finally, when rack 6 contacts limit switch LS, limit switch B contact LS is turned off, third relay _X3 is turned off, and motor M
Then, the back guide 10 stops and returns to the standby state. In this way, in the embodiment shown in FIGS. 3 to 8, simply placing the paper 12 on the paper set tray 1 and turning on the start push button switch PB,
The leading edge 12a of the paper 12 is at the paper leading edge tray position x
can be automatically aligned. Further, when the paper 12 on the paper set tray 1 runs out, the back guide 10 automatically moves back to the last position, and preparations are made for setting the next paper. In the embodiment described above, there was one reflective optical sensor PS, but a plurality of them are arranged along the paper leading edge setting position x, and the output of the sensor PS is sent through an exclusive OR circuit to notify a setting error. It may be connected to a device, and in this way, if the leading edge 12a of the paper 12 is inclined diagonally with respect to the paper leading edge setting position x, a setting error can be notified. Further, by detecting the number of teeth of the rack 6 or the rotation angle of the motor M, the length of the paper 12 can also be detected.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional sheet positioning device, FIG. 2 is a plan view thereof, FIG. 3 is a side view illustrating an embodiment of an automatic stacked sheet positioning device according to the present invention, and FIG. 4 is a side view of a conventional sheet positioning device. The plan view, Fig. 5, is the − of Fig. 3.
The arrow views and FIGS. 6 to 8 are control circuit diagrams of the embodiment, FIG. 6 is a power supply circuit diagram of the first and second relays, FIG. 7 is a power supply circuit diagram of the third relay, and FIG. The figure is a power supply circuit diagram of the motor, and FIG. 9 is a time chart of the above embodiment. 1... Paper set tray, 2, 3... Side guide, 4... Long hole, 5... Gear, 6... Rack,
7...Groove, 8...Fixed bottle, 9...Connection bar, 1
0... Back guide, 11... Pore, 12... Paper, PS... Reflective photo sensor, LS... Limit switch, ST... Schmitt trigger circuit, DI... Differential circuit, FF... Flip-flop , x ₁ , x ₂ , x ₃ ...first, second, third relay,
W _M ...Main winding, W _A ...Auxiliary winding.

Claims (1)

[Claims] 1 Laminated sheet support means whose support surface is inclined upward with respect to a horizontal plane along the sheet conveyance direction, and a lower half of the support surface of the laminated sheet support means with respect to the inclination direction of the support surface. an edge collision piece that is oriented in a right angle direction and is movable reciprocally along the inclination direction; an impact piece lower limit detection means that detects a state in which the edge collision piece is located at the lower limit; an upper edge detection means provided on the upper part of the support surface of the laminated sheet supporting means and capable of detecting the upper edge of the laminated sheet; and an impact piece driving means for moving the edge impact piece located at the lower end of the support surface, and operating the impact piece driving means so as to move the edge impact piece located at the lower end of the support surface upwardly by operating the start switch, and then The operation of the collision piece driving means is stopped by the detection signal of the upper edge detection means, and when the detection signal of the upper edge detection means disappears, the collision piece driving means is operated in the opposite direction and then the collision piece is stopped. An automatic laminated sheet positioning device comprising: a control means for stopping the operation of the contact piece driving means in response to a detection signal from the contact piece lower limit detection means.