JPS62267769A - Image forming device - Google Patents

Abstract

PURPOSE:To excellently accumulate forms after they are classified into groups, by providing a detecting means which detects the position of the receiving table of a jogger and gives an operating command to a picture forming mechanism only when the receiving table is at a prescribed position. CONSTITUTION:If a tray 52 which is the receiving table of a jogger is not at a prescribed position and the tongue piece 76 of an inside plate 53 is not optically detected by the 1st optical detector 75a when copying operations are started, no operating command is given to an image forming mechanism and an operating command is given to the driving motor 55 of the jogger 55. Upon receiving the command, the driving motor 55 is actuated and a spiral shaft 58 is rotated through gears 56 and 57. When the spiral shaft 58 is rotated, the discharged paper tray 52 is moved in the direction of the arrow (a) through a mover 59 and, when the tray 52 reaches the prescribed position, it is detected by the 1st detector 75a and stopped. After the tray stops, the operating command is given to the image forming mechanism and copying operations are started.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention is applied to, for example, a laser printer or an electronic copying machine, and is applied to an image forming apparatus equipped with a jogger that collects ejected sheets into groups. Regarding a position.

(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 For example, move the cradle in the direction perpendicular to the paper ejection direction by 15aI! By sliding the paper, the stacking position of the paper can be changed and the paper can be divided into groups.

(Problem to be Solved by the Invention) However, in the past, copying could be started even when the jogger's cradle was not in a predetermined position, and even if the cradle was moved from this state. There was a problem in that the movement m was not sufficient and the stacking position of the next stacked paper could not be reliably changed, making grouping impossible.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image forming apparatus in which the paper stacking position of the jogger can be reliably changed.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a detection means for detecting the position of the jogger's cradle, and the detection means detects that the cradle is in a predetermined position. Only when detected,
It is characterized in that the image forming means is operated.

(Function) Only when the cradle of the jogger is in a predetermined position, the image forming means is operated to stack sheets, and sufficient movement of the pedestal is ensured when stacking sheets next time.

(Example) The present invention will be described below with reference to an example shown in the drawings. 4 and 5 are an external perspective view and a schematic longitudinal sectional 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 means 4 is provided within the printer main body 5. That is, in the figure, reference numeral 15 denotes a photosensitive drum 15 that is rotatably provided, and a charging device 16 is provided around the photosensitive drum 15.
Laser optical system 17. Developing device 18. 1 transfer device, 20 peeling devices. Cleaning device 21. and static eliminator 22
are arranged in sequence.

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.

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

In addition, at the end of the conveyance path 24, there is a branch conveyance path 35 provided with a pair of paper discharge rollers 34 that guide the paper P, envelope A, etc., which have been separately photographed by the paper discharge selector 32, to the concave portion 6 serving as a paper discharge section. It is formed.

4o shown in FIG. 4 is a lower cover, 41 is a front 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 1 boards constituting the control section.

In the image forming operation, the photoreceptor 15 is driven and uniformly charged by the movement of the charging device 16, and then the laser optical system 17 exposes the photoreceptor 15 to light corresponding to the image signal. to form an electrostatic latent image. Next, this electrostatic latent image on the photoreceptor 15 is developed by a developing device 18 using a two-component developer consisting of toner and carrier, and is sent to the image transfer section 23 side as a developer image.

Meanwhile, in synchronization with this developer image forming operation, the paper feed cassette 2
5, 26. Paper P1 selectively taken out from 27, paper P fed manually, or envelope feeder 3
Envelope A supplied from is fed through a pair of aligning rollers 30, and the developer image previously formed on photoreceptor 15 is transferred onto paper P or envelope A by the action of transfer device 19. Next, paper P or envelope A is removed by a peeling device! 20 , it is peeled off from the photoreceptor 15 , passes through the conveyance path 24 , and is sent to the fixing device 31 . Here, after the developer image is fused and fixed on the paper P or the envelope A, the paper discharge selector 32 discharges the developer image onto the upper jogger 7 or the lower paper discharge tray 12 whose discharge direction is assigned.

Note that after the developer image is transferred onto the paper P or the envelope A, the residual toner remaining on the photoconductor 15 is cleaned by the cleaning device W121, and when the next copying operation is ready, the jogger 7 is moved. It 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 #J mechanism 54 is equipped with a drive motor 55 that rotates in forward and reverse directions, and a gear 56 is attached to the rotating shaft of this drive motor 55.
．． A spiral shaft 58 is connected via 57. Five sliders are fitted into the spiral shaft 58, and the distal end portion 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 plate 53 is fixed to the paper discharge plate 52 by bolts 60 . . . , and a pair of rollers 61 , 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. Further, a circuit board 71 is provided upright within the drive unit 51, and a detection means 72 is provided on this circuit board 71. This detection means 72 includes each light emitting and light receiving element 73゜7.
First and second optical detectors 75a consisting of 4.

75b. These first and second
The mounting positions of the optical detectors 75a and 75b are set to the moving distance of the paper discharge plate 52. On the other hand, approximately at the center of the inner plate 53 is a tongue piece 7 as shown in FIG.
6 is incised. This tongue piece 76 is attached to the paper output tray 5.
2 is in the predetermined position, the detectors 75a, 75b
It is located between the light emitting element 73 and the light receiving element 74 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. In addition, the tongue piece 76
When not detected, no command to operate the image forming mechanism 4 is given, but a command to operate is given to the drive motor 55 of the jogger 7, and the discharge tray 52 is moved until the tongue 76 is detected by the detector 75a or 75b. It is now possible to do so.

Therefore, when starting copying, if the paper ejection tray 52 is not in the predetermined position and the tongue piece 76 of the inner plate 53 is not optically detected by the first optical detector 75a, the image formation t[ No actuation command is given to the jogger 4, but an actuation 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, image formation 1v4
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 slider 59.
2 is moved in the direction of the arrow and moved a predetermined distance, the second
is detected by the detector 75t) and stopped. As a result, the stacking position of the paper P to be ejected next is changed.

Note that 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, when the paper output tray 52 of the jogger 7 is not at the predetermined position, the paper output tray 52 is moved to the predetermined position and then the copy operation is started.
2. Sufficient amount of movement can be secured when changing the stacking position,
The stacking position of the sheets P can be changed reliably and the sheets P can be grouped well.

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

(Effects of the Invention) As explained above, according to the present invention, when the jogger cradle is not in a predetermined position, the cradle is moved to the prescribed position and then the copying operation is started. It is possible to secure a sufficient amount of movement when changing the stacking position of the sheets, and it is possible to reliably change the stacking position of the sheets and to perform good grouping.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a W11fJi side view showing the 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. FIG. 4 is an external perspective view showing the image forming unit;
FIG. 5 is an internal threshold diagram. 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 Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A device main body, and a receiving tray that receives sheets on which images are formed by an image forming mechanism installed in the device main body and is ejected, and moves the receiving tray each time a predetermined number of sheets are accumulated to adjust the stacking position of the paper. and a jogger to be changed, characterized by comprising a detection means for detecting the position of a cradle of the jogger and giving an operation command to the image forming mechanism only when the cradle is in a predetermined position. image forming apparatus. (2) The image forming apparatus according to claim 1, wherein when the cradle is not at a predetermined position, a jogger is driven to move the cradle to a predetermined position.