JPS62269849A - Image forming device - Google Patents

Abstract

PURPOSE:To simplify constitution and facilitate assembly adjustment by installing a detected substance integrally onto a receiving board of a jogger and detecting the position of a paper discharge tray by detecting substance, thus avoiding the need of a turning arm and a supporting mechanism. CONSTITUTION:When a prescribed number of sheets of paper after copying are collected onto a paper discharge tray 52, the driving motor 55 of a jogger 7 is normally revolution-driven, and a spiral shaft 58 is revolved normally, and the paper discharge tray 52 is shifted by a prescribed distance and the second detector 75b detects the tongue piece 76, and the tray 52 is stopped. Then, the paper sheets after copying is discharged, and after a prescribed number of sheets of paper are collected on the paper discharge tray 52, the spiral shaft 58 is revolved reversely, and the paper discharge tray 52 is shifted by a prescribed distance, and then stroped by the detection of the tongue piece 76 by the first detector 75a. Since the tongue piece 76 is installed integrally with the paper discharge tray 52, and the position of the paper discharge tray 52 is detected by the detection of the tongue piece 76, the need of a turning arm or supporting mechanism is avoided, and the simple constitution is permitted, and cost can be cut, and assembly adjustment can be facilitated.

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 copying machine, and collects ejected 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 using a receiving tray, and when, for example, 10 sheets of paper are stacked on this receiving tray, the said receiving tray is corrected. By sliding the sheets a predetermined distance in the opposite direction, the stacking position of the sheets is changed and the sheets are divided into groups.

By the way, the movement of the cradle is detected by a detector, and when a predetermined amount is detected, the cradle is stopped.

(Problem to be Solved by the Invention) However, conventionally, one end side is connected to the cradle of the jogger, and the other end side of the rotating arm, which rotates as the cradle moves, is connected to a detector. Since the position of the pedestal was detected by detecting it, is it possible to support the rotating arm? ! This requires a complicated support line groove, resulting in a complicated structure and high cost, and there are problems in that it takes time to adjust the position of the rotating arm and the detector.

The present invention has been made in view of the above circumstances, and its purpose is to form an image that can detect the position of the cradle without requiring a rotating arm or its support structure, and that is easy to assemble and adjust. The aim is to provide equipment.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a detection object integrally in a part of the cradle of a jogger, and moves the detection object in the moving direction of the pedestal. This feature is characterized in that the position of the pedestal is detected by sensing with first and second detectors arranged along the pedestal.

(Function) The position of the cradle is detected without using a rotating arm by directly detecting the object to be detected, which is integrally provided on the cradle of the jogger, with the first and second detectors.

(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 structure of an image forming unit device equipped with a laser printer as an image forming device of the present invention, and the structure is as follows. It becomes.

In the figure, reference numeral 1 indicates a laser printer as an image forming device.
3 is installed.

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 mechanism 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. Transfer device 19. Peeling device 20. Cleaning device 21. and static eliminator 22
are arranged in sequence.

Further, inside the printer main body 5, an image transfer section 23 between the photoreceptor 15 and one transfer device extends forward! ! 2
A paper feed cassette 25 and a paper feed force cell l-26 of the multi-force set feeder 3 are formed with a feed path 24 and housed at the bottom of the printer main body 5.

Paper P is automatically fed from paper feed rollers 27 through paper feed rollers 28 and transfer rollers 29, etc., paper P is manually fed from manual feeders 1 to 13, and paper P is automatically fed from envelope feeder 3. The envelope A is guided to the image transfer section 23.

Further, an aligning roller pair 30 is disposed on the upstream side of the image transfer section 23 of this conveyance path 24, and a fixing device 3, a paper ejection selector 32, and a paper ejection roller pair 33 are arranged on the downstream side. There is.

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 picked up by the paper discharge selector 32, to the recess 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 boards constituting a 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. and an electrostatic temperature order is formed. Next, this electrostatic latent image on the photoreceptor 15 is developed by a developing device 18 that uses a two-component developer consisting of toner and carrier, and is sent to the image transfer section 23 as a developer image.

On the other hand, in synchronization with this image forming operation, sheets P selectively taken out from the feeding cassettes 25, 26, and 27, manually fed sheets P1, or envelopes A fed from the envelope feeder 3 are placed in the The developer image, which is fed through a pair of lining rollers 30 and previously formed on the photoreceptor 15, is transferred onto the paper P or envelope A by the action of one transfer device. Next, the paper P or the envelope A is peeled off from the photoreceptor 15 by the peeling device 20, 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 wiP or the envelope A, it is discharged onto the upper jogger 7 or the lower paper discharge tray 12, which has been assigned a discharge direction by the paper discharge selector 32.

Note that 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 321, and the next copying operation is ready.

Incidentally, the jogger 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 81 structure 54 is provided within the drive unit 51 . This drive carriage 11154 is equipped with a drive motor 55 that rotates in forward and reverse directions, and a gear 5 is attached to the rotation shaft of this drive motor 55.
A spiral shaft 58 is connected via 6.57.

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. Also,
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 rows 561, 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 light emitting and light receiving elements 73.
First and second optical detectors 75a consisting of .degree.74.

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, as shown in FIG. 1, a tongue piece 76 serving as an object to be detected is integrally formed in a generally central portion of the inner plate 53. This tongue piece 76 is connected to the first or second detector 75a, 7
When located between the light emitting element 73 and the light receiving element 74 of 5b, it is optically detected.

When a predetermined number of copied sheets P are stacked on the paper discharge tray 52, an operation command is given to the drive motor 55 of the jogger 7, and the drive motor 55 is driven, for example, in the forward rotation direction, and the gears 56 and 57 are driven. The spiral shaft 58 is rotated in the forward direction via the . This causes the five movers to move to the arrow a
When the discharge tray 52 is moved by a predetermined amount and its tongue 76 is detected by the second detector 75b, the receiving tray 52 is stopped. Thereafter, when the copied sheets P are discharged again and a predetermined number of sheets are stacked on the discharged sheet h-ray 52, the drive motor 55 is driven to rotate in the reverse direction. As a result, the spiral shaft 58 is reversely rotated through the gears 56 and 57, the mover 59 is moved in the direction indicated by the arrow, and the paper discharge tray 52 is moved a predetermined distance. detected and stopped. As a result, the stacking position of the paper P to be ejected next is changed. Thereafter, the receiving tray 52 is moved in the same manner one after another, and the stacking position of the sheets P is changed.

As described above, the detection object 67 is integrally provided on the pedestal 52 of the jogger 7, and the detection object 67 is detected to detect the position of the paper output tray 52. Since the arm and its support structure are not required, the structure can be simplified, and assembly and adjustment can be facilitated.

It goes without saying that the present invention is not limited to the above-mentioned actual droplet side, and that various modifications can be made within the scope of the gist thereof.

〔Effect of the invention〕

As explained above, the present invention eliminates the need for a rotating arm and its support mechanism, significantly simplifies the configuration, reduces costs, and facilitates assembly and adjustment. be.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view of 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... Device body, P... Paper, 7... Jogger,
8... paper output tray (receptacle), 72... detection means,
76...-Detected object (tongue piece). Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] The apparatus includes a device main body, and a jogger, which is provided on the device main body and receives the paper on which an image is formed and is ejected by a receiver, and moves the receiver to change the stacking position of the paper every time a predetermined number of sheets are accumulated. In the jogger, the position of the pedestal is detected by detecting a detected object provided on a part of the pedestal of the jogger and the detected object arranged along the moving direction of the pedestal. An image forming apparatus comprising a first detector and a second detector.