JPS6366061A - Paper discharger - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a paper ejection device in an image recording apparatus such as an electronic copying machine and a printer.

2. Description of the Related Art Conventionally, there has been known a paper ejection device that ejects paper onto a paper ejection tray using a pair of paper ejection rows arranged at a predetermined position.

However, this paper ejection device has a drawback in that it is not possible to align the leading edges of the paper sheets in the paper ejection tray when the paper sizes are different.

OBJECTIVES An object of the present invention is to provide a paper ejection loading gate that can align the edges of sheets in a paper ejection tray even when the paper sizes are different.

The layered structure of the present invention includes a horizontally moving member arranged to be movable in a substantially horizontal direction, a driving means for moving this horizontally moving member, and a drive means arranged on the horizontally moving member to temporarily move the paper being fed. a pair of paper ejection rollers disposed on the horizontal moving member for ejecting the paper; a paper ejection roller driving means for rotating these paper ejection rollers; and a paper ejection roller for rotating the paper ejection rollers. A paper holding means holds the leading end of the paper that is fed while the horizontally moving member is held at a standby position, and a pair of paper discharge rollers are provided. It is characterized in that after the horizontally moving member is moved forward to a position corresponding to the size of the paper in the sandwiched state, the paper ejection roller is rotated to eject the paper, and then the horizontally moving member is moved back.

Next, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, reference numeral 1 designates a horizontally moving member that is arranged to be movable in a substantially horizontal direction.

A roller 2 is rotatably provided at the bottom of the horizontally moving member 1. These rollers 2 are mounted on rails 3 arranged substantially horizontally. A guide port 4 is provided in the upper part of the horizontally moving member 1. The guide roller 4 moves while being guided by a guide rail 5 arranged substantially horizontally.

The horizontal moving member 1 is moved by a predetermined range in the substantially horizontal direction by a drive means 6.
, 6b, a step motor 6d capable of forward and reverse rotation which is arranged near the rotation '@6c of one pulley 6a, a worm gear 6f fixed to the drive shaft 6e of this step motor 6d, and this worm gear 6f. A gear 6g is meshed with the gear 6g and is fixed to the rotating shaft 6c of the pulley 6a.
It consists of a pair of wires 6h which are attached to the pulleys 6a and 6b and to which both side plates 1a of the horizontally moving member 1 are fixed, and a guide roller 61 which guides these wires 6h.

The horizontally moving member 1 includes both side plates 1a and a holding plate 1b integrally fixed to these plates.

Two paper guide members 1e and ld for guiding the paper P sent from the single image recording device are arranged on the side plates 1a and the holding plate 1b.

As shown in FIGS. 2 and 3, the paper guide member 1
Two holding members 7 are provided protruding from d, and bearings 8 are provided on these holding members 7 so as to be slightly movable in the vertical direction. A rotating shaft 9a of a paper discharge roller 9 is supported by these bearings 8. This paper discharge roller 9 is movable substantially in the vertical direction. Further, a holding member 10 is protruded from the paper guide member 1d, and a spring 1 is attached to the holding member 10 to press the rotating shaft 9a of the paper ejection roller 9 upward.
1 is retained.

As shown in FIG. 3, the paper guide member IC also has two supporting members 12 protruding from each other.
is provided with a one-way clutch 13 and a bearing 14, and these one-way clutch 13 and bearing 14
A rotating shaft 15a of a paper ejecting roller 15 is supported by the rotating shaft 15a. This paper ejection roller 15 is rotated by a paper ejection roller drive means 16.

This paper discharge roller driving means 16 includes a motor 16a fixed to the holding plate 1b of the horizontally moving member 1, and a motor 16a fixed to the holding plate 1b of the horizontally moving member 1.
A pulley 16c fixed to the drive N16b, and a rotating shaft 15 of the paper discharge roller 15 facing the pulley 16c.
Pulley 16d fixed to a and these pulleys 16c
, and a belt 16s attached to 1f3d.

The one-way clutch 13 does not prevent the paper ejection roller 15 from rotating in the direction in which the paper P is ejected, and prevents the paper ejection roller 15 from rotating in the opposite direction to the direction in which the paper P is ejected. .

On the paper P insertion side of the paper discharge rollers 9 and 15.

A paper sensor 17 for detecting paper P is arranged.

This paper sensor 17 is made of a photosensor and is fixed to the one-paper guide member 1d. A roller standby position sensor 18 is arranged at a predetermined position to detect when the paper discharge roller 9.15 is placed at a standby position to receive the paper P being sent. This roller standby position sensor 18 is composed of a photosensor, and detects that the side FL1a of the horizontally moving member 1 is placed at a predetermined position.
, 15 are placed in the standby position.

A paper discharge tray 19 is arranged below the horizontally moving member 1. Four roller position sensors 20 are arranged at positions corresponding to the size of the paper P stored in the paper discharge tray 19. These roller position sensors 20 are composed of photosensors, and detect that the paper ejection rollers 9 and 15 are placed at predetermined positions by detecting that the horizontally moving member 1 is placed at a predetermined position.

FIG. 4 shows a control device for the above-mentioned paper discharge device, which will be explained next.

Information on the paper sensor 17, roller standby position sensor 18, roller position sensor 20, power key 21, etc., and information on the size of paper P from the control device 22 of the image recording apparatus are given to the microcomputer 23. The RAM of this microcomputer 23 is provided with a reciprocating flag, a paper size counter, a roller position counter, and the like. The output port of the microcomputer 23 is
A drive means 6, a discharge roller drive means 16, and the like are connected.

The operation of the above-mentioned paper ejecting device will be explained based on FIGS. 5 and 6. The ROM of the microcomputer 23 stores programs shown in the flowcharts of FIGS. 5 and 6.

First, in step (1), it is checked whether the power key 21 is turned on. In step (1), power key 21 is turned to O.
If it is determined to be N, initial settings are performed in step (2). In this initial setting, the R of the microcomputer 23 is
AM and I/O ports are cleared.

Next, in step (3), it is checked whether the paper sensor 17 is ON. Paper sensor 17 is turned on in step (3)
If it is determined that
Check whether ≧t1.

In this case,
This is the predetermined time required from the time when the paper sensor 17 is turned ON in step 3) until the paper discharge rollers 9 and 15 grip the leading edge of the paper P.

If it is determined in step (5) above that tx≧t1,
In step (6), the paper discharge roller drive means 16 is turned off, and after passing through the paper size determination routine in step (7), it is checked in step (8) whether or not [paper size counter]=O. If it is determined in step (8) that [paper size counter] is not 0.

Set [round trip flag] to 1 in step (9), and step (
In step 10), the drive means 6 is turned on to move the paper ejection rollers 9 and 15 forward, and in step (11), the roller position sensor 2 is turned on.
Check whether 0 has changed from OFF to ON. In step (11), the roller position sensor 20 changes from OFF to O.
If it is determined that the value is N, then in step (12) [roller position counter] is set to +1, and then in step (13), [roller position counter] is set to +1.
Check whether roller position counter]=[paper size counter].

If it is determined in step (13) above that [roller position counter] = [paper size sensor], then step (10
) and keep the driving means 6 ON. Step (1
3) [Roller position counter] = [Paper size sensor]
If it is determined that this is the case, the driving means 6 is turned off in step (14), the [reciprocating flag] is set to 0 in step (15), and the paper ejection roller driving means 16 is turned on in step (16).
Then, in step (17), it is checked whether ty≧t2. This ty is the elapsed time from the time when the paper ejection roller driving means 16 was turned on in step (16), and t2 is the elapsed time from the time when the paper ejection roller driving means 16 was turned on in step (16). This is the predetermined time required until the largest paper P accommodated in the paper sheet 19 is ejected by the paper ejection rollers 9 and 15.

If it is determined that [paper size counter] = 0 in the above step (8), that is, if it is determined that the size of the paper P to be discharged is the maximum, the paper discharge rollers 9 and 15 integrated with the horizontal movement member 1 are moved forward. There is no need to do this, so step (1)
6) Jump to and turn on the paper ejection roller drive means 1G to eject the paper P.

If it is determined in the above step (17) that ty≧t2, the paper ejection roller driving means 16 is turned off in step (18).
Then, in step (19), the drive means 6 is turned on to move the paper discharge rollers 9 and 15 backward, and in step (20) it is checked whether the roller standby position sensor 18 is on. If it is determined in step (2G) that the roller standby position sensor 18 is not ON, the process returns to step (19) and the driving means 6 is held ON.

In step (20) above, the roller standby position sensor 18 is set to O.
If it is determined that the driving means 6 is
Turn off the power key 21 in step (22).
Check whether it is OFF.

If it is determined in step (22) that the power key 21 is not OFF, the process returns to step (3). If it is determined in step (22) that the power key 21 is OFF, the operation is stopped.

Next, the paper size determination routine in step (7) will be explained based on FIG. 6.

If the size of paper P sent from the control device of the image recording device is S, then 5=s in steps (23) to (26)
ol S1+ S2 + S3 or S4 (So>
It is checked whether S L > 32 > 53 > S 4 ). 5 in steps (23) to (26)
If it is determined that =sol 511S2+S3 or S4, then in steps (27) to (31), the paper size counter is set to 0°1+L3 or 4, and then the process returns to the main routine.

In the embodiment described above, the paper holding means 2 temporarily holds the paper P when the paper ejection roller 9° 15 moves forward.
4 is formed so that the leading edge of the paper P is held between the paper ejection rollers 9 and 15 themselves, but as shown in FIG. Paper holding means 2 that temporarily holds the leading end of the paper P inserted between
4 may be provided. The paper clamping means 24 includes two elastic clamping pieces 24a that are fixed to the upper surface of the paper guide member 1d and can be easily elastically deformed, and two elastic clamping pieces 24a that are fixed to the lower surface of the paper guide member 1d and that can be easily elastically deformed. It consists of two solenoids 24c that displace the elastic clamping piece 24a upward by an actuator 24b through a hole.

The elastic clamping piece 24a is arranged so as to be sufficiently extended from the paper guide member 1c so as not to become an obstacle to the movement of the paper P when the solenoid 24c is OFF. When the solenoid 24c is turned on when the paper P is sandwiched between the paper discharge rollers 9 and 15 and the leading edge of the paper P reaches between the elastic clamping piece 24a and the paper guide member 1c, the actuator of the solenoid 24c is turned on. 24b is the elastic clamping piece 24
a upwardly, this elastic clamping piece 24a presses the paper iP against the paper guide member 1c, and the paper P is moved together with the paper guide member 1c.
to hold.

Effects The paper ejection device of the present invention ejects the paper after the paper ejection roller moves forward to a position corresponding to the size of the paper to be ejected.
Even if the paper sizes are different, the leading edges of the paper sheets in the 1-ray can be aligned.

[Brief explanation of drawings]

Figure 7jI is a partially cutaway perspective view showing the paper discharging device of the present invention, FIG. 2 is a perspective view showing the main parts of the same paper discharging device, and FIG. 3 is a partially cutaway side view showing the main parts of the same paper discharging device. Fig. 4 is a block diagram showing the control device of the above Wandering paper, Nos. 57 and 6.
The figure is a flowchart for explaining the operation of the above-mentioned sheet discharge device, and Fig. DESCRIPTION OF SYMBOLS 1... Horizontal moving member, 6... Driving means, 9°15.
... Paper discharge roller, 16... Paper discharge roller driving means, 19
. . . Paper output tray, 24 . . . Paper holding means. Figure 2 Figure 3

Claims (1)

[Claims] 1. A horizontally moving member disposed to be movable in a substantially horizontal direction, a driving means for moving this horizontally movable member, and a sheet of paper disposed on the horizontally movable member for temporarily holding the paper being fed. a clamping means, a pair of paper ejection rollers disposed on the horizontal moving member to eject the paper, a paper ejection roller drive means for rotating these paper ejection rollers, and a paper ejected by the paper ejection rollers; The horizontally moving member is placed in a standby position, and the leading edge of the paper being fed is held by the paper holding means, and the paper is moved horizontally while being held by the pair of delivery rollers. A paper ejection device characterized in that, after a member is moved forward to a position corresponding to the size of the paper, a paper ejection roller is rotated to eject the paper, and then a horizontally moving member is moved back.