JP2935906B2 - Transfer paper supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer paper supply device for a copying machine.

[0002]

2. Description of the Related Art A conventional transfer paper supply apparatus for a copying machine is disclosed, for example, in Japanese Utility Model Laid-Open No. 62-32048. This paper feeder has a feeding means for feeding out at least one transfer paper from a transfer paper storage unit (also referred to as a tray), and a separating means for separating the fed transfer paper and sending it one by one to a subsequent transfer step. In the apparatus, there is provided a pressing force releasing means for releasing the pressing force of the feeding means and the pressing force of the separating means to the transfer paper remaining in the separating section after one sheet has been fed by the separating means, and releasing the pressing force. has been in contact with the transfer sheet tip end moves substantially parallel to the transfer paper free state, which is the ash provided transfer sheet returning means for returning to the transfer paper compartment.

[0003]

In the above-described transfer paper supply apparatus, when a sheet is fed from a certain number of trays among a plurality of stacked trays, and then the transfer to another number of trays is required. When the leading edge of the transfer paper on the tray of the number of paper feed stages is left near the feed roller or the separation roller by the double feed (multiple feed) by the pick-up roller, the remaining paper is Problems such as dragging and jams occur.

[0004]

A plurality of trays for accommodating transfer paper are provided vertically on the tray surface, and a tray position moving means for vertically moving to the position of the selected tray, and a selection means therefor. Transfer paper supply provided with a paper feeder having paper feed position moving means for horizontally moving the selected tray to the paper feed position and transfer paper sending means for sending the transfer paper at least one sheet at a time from the selected tray A guide plate moving mechanism including a guide plate that has a guide surface for guiding the transfer paper and a pressing surface facing the leading end of the transfer paper stacked on the selected tray and that moves in the horizontal direction. the provided sheet feed conveyance from said selected tray when the tray change after the transfer sheet is one delivery unit
The tray sent the transfer paper with the operation of preparative slightly raised by horizontally moving provided tray return control means returns to the home position, the surface of the tray returned to the home position by the tray return control means A transfer paper protrusion control unit is provided for returning the transfer paper protruding to the position in the tray by the pressing surface of the guide plate of the guide plate moving mechanism.

[0005]

When the tray is changed, the transfer paper protruding from the surface of the tray returned to the home position can be returned to a normal position in the tray where paper can be fed by the transfer paper protruding control means. It is possible to perform normal paper feed control by eliminating defects such as remaining paper and jams due to feeding.

[0006]

An embodiment of the present invention will be described with reference to the drawings. First, the overall configuration of the copier system will be outlined with reference to FIG. It comprises a copying machine main body 1 and a transfer paper supply device 2 provided below the copying machine main body 1. The transfer paper supply device 2 includes a plurality of types of trays 5 provided on the gantry 3 and having different numbers of transfer papers 4 stored therein, and a tray position moving unit that moves vertically to a position of the selected tray 5. The copier 1 includes a paper feed unit 6 and a paper feed unit 6 a that feeds the transfer paper 4 into the copying machine main body 1.
In addition, the transfer paper supply device 2 sends out the transfer papers 4 stored in each tray 5 one by one, and a paper supply position moving means (not shown) for horizontally moving the selected tray 5 to the paper supply position. Transfer paper sending means (pickup roller 1 described later)
7). FIG. 14 shows the transfer paper supply device 2
FIG. In this embodiment, in the transfer paper supply device 2 as described above, as shown in FIGS. 1 and 2, in the horizontal direction H facing the leading end of the transfer paper 4 stacked on the selected tray 5. A guide plate moving mechanism 8 having a movable guide plate 7 is provided, and when the transfer tray 4 is changed after one transfer sheet 4 is sent out from the selected tray 5, the tray 5 to which the transfer sheet 4 is sent is moved in the horizontal direction H.
The tray return control means (not shown) is provided to move the tray 5 to the home position P.
The transfer paper protruding control means (not shown) for returning the transfer paper 4 protruding from the surface to the position in the tray 5 by the guide plate moving mechanism 8 is provided.

Next, the configuration and operation of each part of the transfer paper supply device 2 will be described. 3 and 4 show a moving mechanism around the tray 5 of the transfer paper supply device 2. FIG. An operation unit 1a provided on the lower front surface of the copying machine body 1
Assuming that, for example, the first tray 5 is selected by a tray selection key (not shown) of FIG. 13 (see FIG. 13), the tray 5 is moved from the retracted position (hereinafter, referred to as the home position P) to the sheet feeding unit 6 (in FIG. 4). In the arrow direction A). At this time, the drive system 9 for moving the tray 5
When the motor 10 rotates, the gears 11 and 12 and the rack gear 13 rotate or move in the direction indicated by the dotted arrow a, whereby the tray 5 is sent out in the front direction A. As shown in FIG. 5, a projection 14 is provided at the rear of the moving tray 5, and when the home position P is at the home position P, the home sensor 15 and the set sensor 1 are provided.
6 is in a light shielding state (OFF). Then, the tray 5 is sent out to the paper feed unit 6 side, and the drive of the motor 10 is stopped when the set sensor 16 is turned on (ON). When the movement of the tray 5 is completed, the sheet feeding / conveying unit 6 is lowered in FIG. 1, and the pickup roller 17 attached to this unit comes into pressure contact with the transfer paper 4 stacked on the tray 5. When the protrusion 18 integrated with the pickup roller 17 shields the sensor 19 due to this pressure contact, the drive of the motor 20 is stopped by the detection signal, and the sheet can be fed. Can feed paper.

If the transfer paper 4 is exhausted during the feeding of the tray 5 or another tray 5 located below the tray 5 is selected by the tray selection key of the operation section 1a, the motor 10 rotates again (this time, In the opposite direction) and the gear 1
1, 12 and the rack gear 13 rotate or move in the direction indicated by the solid arrow b. Further, the tray 5 is moved and the drive of the motor 10 is stopped until the projection 14 at the rear end of the tray shields (turns off) the home sensor 15, and then the paper feed unit 6 is raised. When the sensor 22 is shielded from light, the ascent of the unit is stopped. Hereinafter, the lower tray 5 can be similarly operated.

Next, in the transfer paper supply device 2 as described above, the double feed (multiple feed) by the pickup roller 17 is performed.
A method for preventing a problem when a problem occurs will be described with reference to FIGS. 1 and 2 and FIGS. First, FIG.
8 shows a state similar to the above-described operation description, and FIG. 7 shows a state when the sheet feeding / conveying unit 6 is at an initial position (home position) before descending. FIG. 8 shows a state in which the sheet feeding / conveying unit 6 is driven down by the motor 20 when the tray 5 is selected, and the transfer sheet 4 on the tray 5 can be fed. It is shown. Next, when the transfer paper 4 is fed in response to the feed signal from the state of FIG.
As shown in FIG. 7, when two or more transfer papers 4 are fed by the pickup roller 17, a FRR (Feed Reverse Roll)
er), the uppermost transfer sheet 4 is sent out as it is, but the second and lower transfer sheets 4 remain without being sent. As described above, there is no problem when the sheet is fed again on the same tray 5. However, when another tray 5 provided at the lower stage is selected and its position is changed in this state, the above-described operation is performed. Since the sheet feeding / conveying unit 6 moves in accordance with such a series of operations, the remaining second and lower transfer sheets 4 are also lifted together, and as a result, when a sheet is fed from the next tray 5, a problem such as a jam occurs. Will do.

In this embodiment, in order to prevent such a problem, the guide plate moving mechanism 8 as described above is used.
And a tray return control unit and a transfer sheet protrusion control unit. That is, first, as shown in FIG. 10, the sheet feeding / conveying unit 6 is slightly raised (the amount by which the sheet is transported is determined when the uppermost sheet of the transfer paper 4 is located substantially at the center of the guide plate 7 of the guide plate moving mechanism 8). 11) Then, as shown in FIG. 11, the tray 5 is moved in the direction B by the tray return control means to bring it to the home position P. Next, as shown in FIG. 12, the guide plate 7 of the guide plate moving mechanism 8 is
3 is moved in the tray direction (B direction). In this case, as shown in FIG. 2, the guide plate moving mechanism 8 converts the rotational force of the motor 23 to a linear motion by transmitting the rotational force to the connecting rod 23c via the worm 23a and the wheel gear 23b. The guide plate 7 connected to the connecting rod 23c can be moved in the B direction. Therefore, as shown in FIG.
Since the transfer paper 4 protruding out of the tray 5 can be returned to the tray 5, it is possible to eliminate a problem such as a jam when the tray is changed. FIG. 15 shows the state of the circuit configuration inside the device that performs the various controls described above.

[0011]

According to the present invention, a plurality of trays for accommodating transfer papers are provided vertically on a tray surface thereof, and a tray position moving means for vertically moving to the position of the selected tray and a selection means for the tray position. Transfer paper supply provided with a paper feeder having paper feed position moving means for horizontally moving the selected tray to the paper feed position and transfer paper sending means for sending the transfer paper at least one sheet at a time from the selected tray A guide plate moving mechanism including a guide plate that has a guide surface for guiding the transfer paper and a pressing surface facing the leading end of the transfer paper stacked on the selected tray and that moves in the horizontal direction. And when the tray is changed after one sheet of the transfer paper has been sent from the selected tray ,
It is horizontally move the tray sent the transfer paper with the operation to be increased slightly to provide a tray return control means returns to the home position, protruding from the tray by returning the control means to the home position back surface of the tray The transfer paper protrusion control means for returning the transferred transfer paper to the position in the tray by the pressing surface of the guide plate of the guide plate moving mechanism is provided, so that when the tray is changed, the transfer paper protrudes from the surface of the tray returned to the home position. It is possible to return a part of the transferred paper to a normal position in the tray where paper can be fed using the transfer paper protrusion control means, thereby eliminating problems such as remaining paper and jams caused by double feeding of the pickup roller. The normal paper feed control can be performed.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a state of a sheet feeding and conveying unit and a vertical conveying unit of a transfer sheet feeding apparatus according to an embodiment of the present invention.

2A is a side view showing a state before and after moving a guide plate of a guide plate moving mechanism, and FIG. 2B is a plan view of the mechanism.

FIG. 3 is a perspective view illustrating a state of an overall configuration of a transfer paper supply device.

FIG. 4 is an enlarged perspective view showing a moving mechanism of a tray unit.

FIG. 5 is a perspective view illustrating a state of a sensor unit that detects a movement state of a tray attached to a rear portion of the tray.

FIG. 6 is a perspective view illustrating a state of a sheet feeding unit and a vertical conveying unit.

FIG. 7 is a side view illustrating a state in which the sheet feed unit is at a home position.

FIG. 8 is a side view illustrating a state in which the sheet feeding / conveying unit is in a state in which the sheet can be fed by contacting the transfer sheet.

FIG. 9 shows a state in which the pickup roller of the sheet feeding / conveying unit 2
FIG. 7 is a side view illustrating a state when more than one transfer sheet is sent.

FIG. 10 is a side view showing a state in which the sheet feeding / conveying unit is slightly raised above the tray while sandwiching the transfer sheet in order to prevent a problem such as a jam.

FIG. 11 is a side view showing a state where the tray is moved to a rear home position.

FIG. 12 is a side view showing a state in which the transfer paper protruding from the tray is returned to a position in the original tray by using a guide plate.

FIG. 13 is a vertical sectional side view schematically showing the overall configuration of a copying machine system including a transfer paper supply device.

FIG. 14 is a plan view illustrating an external configuration of a transfer paper supply device.

FIG. 15 is a block diagram showing a state of a circuit configuration inside the transfer paper supply device.

[Explanation of symbols]

 4 Transfer paper 5 Tray 6 Tray position moving means 7 Guide plate 8 Guide plate moving mechanism 17 Transfer paper sending means H Horizontal direction P Home position

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65H 1/00-3/68

Claims (1)

(57) [Claims] A plurality of trays for accommodating transfer papers are provided vertically on the tray surface, and a tray position moving means for vertically moving to a position of the selected tray; A transfer paper supply device provided with a paper supply device having a paper feed position moving means for horizontally moving to a paper feed position and a transfer paper sending means for sending the transfer paper at least one sheet at a time from the selected tray. A guide plate moving mechanism including a guide plate having a guide surface for guiding the transfer paper and a pressing surface facing the leading end of the transfer paper stacked on the selected tray and having a guide plate moving in a horizontal direction; When changing the tray after one sheet of transfer paper has been sent from the selected tray, raise the paper feed unit slightly.
The tray from which the transfer paper has been sent out
A tray return control means for moving the transfer paper protruding from the surface of the tray returned to the home position by the tray return control means. A transfer sheet feeding control device for returning the transfer sheet to a position in the tray.