JPS62269847A - Image forming device - Google Patents

Abstract

PURPOSE:To distinctly group-assort paper sheets by detecting the position of the receiving board of a jogger and discriminating if the receiving board is at a regular position or not. CONSTITUTION:When copying is started, if a paper discharge tray 52 is not at a prescribed position, and the first optical detector 75a does not detect the tongue piece 76 of an inside plate 53, an operation instruction is provided into the driving motor 55 of a jogger, and the paper discharge tray 52 is shifted to stop at a prescribed position. A prescribed number of pieces of the paper sheets on which image formation is completed are collected and detected, and the paper discharge tray 52 is shifted by a prescribed distance, and then stopped by the detection by the second detector 75b. Therefore, when the paper discharge tray 52 of the jogger is not at the prescribed position, copying operation is started after shifting the paper discharge tray 52 to a prescribed position, and the transfer quantity on the variation of the accumulation position of the paper discharge tray 52 can be secured sufficiently, and the accumulation position for the paper sheets can be varied certainly, and the superior group assortment is permitted.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Object of the Invention) (Industrial Application Field) The present invention is applied to, for example, a laser printer or an electronic copy machine, and collects discharged sheets by group. The present invention relates to an image forming apparatus including a jogger.

(Prior Art) In general, this type of jogger receives paper with an image formed thereon by a laser printer or the like and is ejected by a receiving tray, and when, for example, 10 sheets of paper are stacked on this receiving tray, the above-mentioned paper is By reciprocating the receiving tray in a direction perpendicular to the paper ejection direction, the paper stacking position is changed and the paper is divided into groups.

(Problems to be Solved by the Invention) However, in the past, the position of the jogger's cradle could not be detected, and the cradle could be moved from a state where the cradle was not in its normal position. was there. In this case, there was a problem in that the amount of movement of the jogger holder was not sufficient, the stacking position did not change much, and the sheets could not be clearly divided into groups.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an image forming apparatus in which a jogger holder has sufficient space for transfer [1] and sheets can be clearly divided into groups. This is what I am trying to do.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above problems, the present invention is characterized in that it includes a detection means for detecting the position of the cradle of the jogger.

(Operation) The position of the cradle of the jogger is detected by the detection means, and it is determined whether the pedestal is in a normal position or not.

(Examples & Examples) The present invention will be described below with reference to an embodiment shown in the drawings. 4 and 5 are an external perspective view and a schematic vertical side view showing the internal configuration of an image forming unit device equipped with a laser printer as an image forming device of the present invention,
The structure is as follows.

In the figure, reference numeral 1 denotes a laser printer as an image forming apparatus, and this laser printer 1 is placed on a multi-force set feeder 2, and an envelope feeder 3 is attached to the rear side thereof.

The laser printer 1 has the following configuration. That is, numeral 5 in the figure is a main body of a laser printer, and the rear part of the upper surface of this printer main body 5 is raised one step higher, and a recess 6 serving as a paper ejection section is formed in the center of the upper surface. A jogger 7 is provided in this recess 6. Further, an operation panel display section 9 and an operation panel switch section 10 are provided on the right side of this recess 6, and three I/Os are provided on the left side.
A C card insertion 11... is provided.

Further, an image forming device 4 is provided within the printer main body 5. That is, 15 in the figure is a photosensitive drum 15 that is rotatably provided, and a band'R device 16 is installed around the photosensitive drum 15.
．． Laser optical system 17. Developing device 18. Transfer device 19. The device 20. Cleaning device 21. and a static eliminator 22 are arranged in this order.

Furthermore, a conveyance path 24 is formed in the printer body 5 and extends forward through an image transfer section 23 between the photoreceptor 15 and one transfer device, and a paper feeding path 24 is formed in the printer body 5 and extends forward through an image transfer section 23 between the photoreceptor 15 and one transfer device. Cassette 25 and multi-force feeder 3
paper feed rollers 28 from the paper feed cassettes 26 and 27 respectively.
. . . and the transport rollers 29 . It is designed to lead to 23.

Further, an aligning roller pair 30 is disposed on the upstream side of the image transfer section 23 of the conveyance path 24, and a fixing device 31. A paper discharge selector 32 and a pair of paper discharge rollers 33 are provided.

At the end of the conveyance path 24, a branch conveyance path 35 is formed, which includes a pair of paper discharge rollers 34 that guide the sheets P, envelopes A, etc. sorted by the paper discharge selector 32 to the recess 6 serving as a paper discharge section. has been done.

In FIG. 4, 40 is a lower cover, 41 is a front 1 cover, 42 is an upper cover, and 43 is a right cover.

44 is the left cover, 45 is the right cover opening/closing lever.

46 is a lever for opening and closing the upper unit, and 47, 48, . . . , 49 shown in FIG. 5 are control boards constituting the control section B.

In the image forming operation, the photoreceptor 15 is driven and uniformly charged by the charging device 16, and then the laser optical system 17 exposes the photoreceptor 15 to light corresponding to the image signal. A static R latent image is formed. Next, the electrostatic latent image on the photoreceptor 15 of the mouth is transferred to a developing device 18 using a two-component developer consisting of toner and carrier.
The image is transferred to the image transfer section 23 as a developer image.

On the other hand, in synchronization with this developer image forming operation, paper feed force Sera 1 to
25.26.27 Sheet P selectively taken out, or manually fed paper P, or envelope ~ feeder
Envelope A supplied from 3 is fed through aligning roller pair 30, and the developer image previously formed on photoreceptor 15 is transferred to paper P or envelope A by the action of one transfer device. . Next, the MiP or envelope A is peeled off from the photoreceptor 15 by the peeling device 20.
It passes through the conveyance path 24 and is fed into the fixed @ device @31. Here, after the developer image is fused and fixed on the paper P or the envelope A, the sheet is discharged by the sheet discharge selector 32 onto the upper jogger 7 or the lower sheet discharge tray 12, which are separated in the discharge direction.

After the developer image is transferred onto the paper P or the envelope A, the residual toner remaining on the photoreceptor 15 is cleaned by the cleaning device 21, and when the next copying operation is ready, the job is -7 is constructed as shown in FIGS. 1 to 3. That is, numeral 51 in the figure is a drive unit, and a paper discharge tray 52 serving as a cradle is provided on the front side of the drive unit 51 so as to be slidable in a direction perpendicular to the paper discharge direction of the paper P via an inner plate 53. installed.

A drive mechanism 54 is provided within the drive unit 51. This drive mechanism 54 is a drive motor 55 that rotates in forward and reverse directions.
A gear 56.5 is provided on the rotating shaft of the drive motor 55.
A spiral shaft 58 is connected via 7. A slider 59 is fitted onto the spiral shaft 58, and the distal end of the slider 59 is inserted and locked into a locking hole 67 bored in the lower side of the inner plate 53. Further, the inner plates 1 to 53 are fixed to the paper discharge plate 52 by bolts 60 . . . , and a pair of rows 561 and 61 are attached to the lower side of the inner plate 53 . These rollers 61, 61 are placed on a guide rail 62 formed at the inner bottom of the drive unit 51, and run along this guide rail 62. Also,
A circuit board 71 is installed upright within the drive unit 51,
This circuit board 71 is provided with a detection means 72 .

This detection means 72 includes light emitting and light receiving elements 73 and 74.
First and second optical detectors 75a.

75b. On the other hand, as shown in FIG. 1, a tongue piece 76 serving as an object to be detected is formed in a substantially central portion of the inner plate 53.

When the paper discharge tray 52 is in a predetermined position, the tongue piece 76 is located between the light emitting element 73 and the light receiving element 74 of the detectors 75a and 75b, and is optically detected. These detectors 75a.

75b detects the tongue piece 76, the circuit board 7
An operation command for the image forming mechanism 4 is given to a control section (not shown) via the image forming apparatus 1.

Further, when the tongue piece 76 is not detected, the image forming mechanism 4
The drive motor 55 of the jogger 7
An activation command is given to the tray 52, and the paper discharge tray 52 is moved until the tongue piece 76 is detected by the detector 75a or 75b.

Therefore, when starting copying, if the paper ejection tray 52 is not in a predetermined position and the tongue piece 76 of the inner plate 53 is not optically detected by the first optical detector 75a, the image forming mechanism 4 An operation command is not given to the drive motor 55 of the jogger 7, but an operation command is given to the drive motor 55 of the jogger 7. As a result, the drive motor 55 is operated and the gear 56 and the gear 5 are
7, the spiral shaft 58 is rotated, and the paper output tray 52 is moved in the direction of arrow a via the mover 59, and when it reaches a predetermined position, it is detected by the first detector 75a and the paper output tray 52 is stopped. Ru. After that, the image forming mechanism 4
An operation command is given to start copying. As a result, when a predetermined number of sheets P on which images have been formed are discharged onto the paper discharge tray 52 and a predetermined number of sheets, for example 10, are accumulated, this is detected by a detector (not shown), and the drive motor 55 is reversely driven.

As a result, the spiral shaft 58 is rotated via the gear 56 and the gear 57, and the paper output tray 58 is rotated via the five movers.
2 is moved in the direction indicated by the arrow and moved a predetermined distance, the second
is detected by the detector 75b and stopped. As a result, the stacking position of the paper P to be ejected next is changed.

Incidentally, when the paper ejection tray 52 is in a predetermined position at the time of starting copying, an operation command is directly given to the image forming mechanism 4 and the copying operation is started.

As described above, if the paper ejection tray 52 of the jogger 7 is not at the predetermined position, the stacking position of the paper ejection tray 52 may be changed in order to move the paper ejection tray 52 to the predetermined position and then start the copying operation. It is possible to secure sufficient movement @ffi at the time of printing, to reliably change the stacking position of the sheets P, and to group them well.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways within the scope of its gist.

〔Effect of the invention〕

As described above, according to the present invention, since the position of the jogger's cradle is detected by the detection means, it is possible to determine whether the position of the cradle is at a normal position.

Therefore, when the pedestal is not at a predetermined position, the paper can be stacked after moving the pedestal to a predetermined position, and the paper can be clearly grouped.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view showing a jogger, FIG. 2 is a partially cutaway front view of the jogger, and FIG. 3 is a plan view showing the inside of the drive unit. figure,
FIG. 4 is an external perspective view showing the image forming unit, and FIG. 5 is an internal configuration diagram thereof. 1... Apparatus body, P... Paper, 4... Image forming mechanism, 7... Jogger, 8... Paper output tray (receiver)
72...Detection means. Applicant's agent Patent attorney Takehiko Suzue:':1 koεπ 2! If-+ 3rd earthquake

Claims (2)

[Claims] (1) An apparatus comprising a main body of the apparatus and a jogger which is installed in the main body of the apparatus and receives ejected paper by a receiving tray, and moves the receiving tray to change the stacking position of the paper every time a predetermined number of sheets are accumulated. . An image forming apparatus comprising: a detection means for detecting a position of a cradle of the jogger. (2) A patent claim characterized in that the detection means detects an object to be detected provided in a part of the cradle using first and second detectors arranged along the moving direction of the cradle. The image forming apparatus according to item 1.