JPS62269848A - Image forming device - Google Patents

Abstract

PURPOSE:To simplify constitution and cut cost and permit the certain drive by screwing a connection part with a shaft and transferring the connection part by the normal and reverse revolution of the shaft and moving a receiving board in reciprocation, thus avoiding the need of a clutch mechanism. CONSTITUTION:When a prescribed number of sheets of paper after copying are collected into a paper discharge tray, an operation instruction is provided for the driving motor 55 of a jogger, and the jogger is normally revolution- driven, and a spiral shaft 58 is revolved normally, and a transfer element 59 is shifted by a prescribed quantity in the direction of arrow (a), and the paper discharge tray is stopped after the detection of the tongue piece by the second detector 75b. When a prescribed number of paper sheets after image formation are collected, the spiral shaft 58 is revolved reversely, and the transfer element 59 is shifted by a prescribed distance in the direction of arrow (b), and the paper discharge tray is stroped by the detection by the first detector 75a. Since the paper discharge tray is moved in reciprocation by the normal and reverse revolution of the spiral shaft 58a, the need of clutch mechanism etc. can be avoided, and the simple constitution is permitted, and cost can be cut, and certain drive is secured.

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 discharged sheets by group. The present invention relates to an image forming apparatus including a jogger.

(Prior art) Generally, this type of jogger uses a tray to receive paper that is ejected with an image formed on it by a laser printer or the like.
When a predetermined number of sheets of paper are stacked on this pedestal, the pedestal is moved back and forth each time the sheets are stacked, thereby changing the stacking position of the sheets and dividing them into groups.

(Problems to be Solved by the Invention) However, in the past, a swinging arm was connected to the cradle of the jogger, and the cradle was caused to reciprocate by swinging the swinging arm. A clutch mechanism is required to intermittent the swinging of the swinging arm, and is there a structural problem? ! There were problems such as complication and high cost.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an image forming device which has a simple structure and is capable of reciprocating the cradle of a jogger.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention has a connecting part connected to a cradle of a jogger, a shaft screwed to this connecting part, and a shaft that can be rotated in forward and reverse directions. The device is characterized by comprising a drive source that operates the connecting portion and reciprocates the pedestal by causing the cradle to reciprocate.

(Function) By rotating the shaft in forward and reverse directions using a drive source, the jogger cradle is reciprocated via a connecting portion that moves along the axial direction of the shaft.

(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 elf of the present invention, and have the following configuration. ing.

In the figure, reference numeral 1 denotes a laser printer that performs image forming operations. 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 chamber 1 and 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 charging device 16 is installed around the photosensitive drum 15.
．． Laser optical system 17. Phenomena device 18. 1 transfer device, 20 peeling devices. Cleaning device 21. and static eliminator 2
2 are arranged in sequence.

Furthermore, a conveyance path 24 is formed in the printer body 5 and extends forward through the image transfer section 23 between the photoconductor 15 and one transfer device, and a feeding path 24 is formed in the printer body 5 and is housed at the bottom of the printer body 5. Paper cassette 25 and multi-force set feeder 3
paper feed rollers 28 from the paper feed cassettes 26 and 27 respectively.
... and the paper P that is automatically fed through the transfer roller 29..., the paper P that is manually fed from the manual tray 13, and the envelope △ that is automatically fed from the envelope feeder 3 to the image transfer section 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.

Note that, at the end of the conveyance path 24, there is a branch conveyance path provided with a pair of paper discharge rollers 34 that guide the sheets P, envelopes A, etc., which have been separated into one batch by the paper discharge selector 32, to the concave portion 6 serving as a paper discharge section. 35 is formed.

In FIG. 4, 40 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 υj control 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, the electrostatic latent image on the photoreceptor 15 is developed using a two-component developer consisting of toner and carrier (imaging device 18).
The image is developed as a developer image by the image transfer unit 23! l
l! sent to II.

Meanwhile, in synchronization with this image forming operation, the paper feed cassette 2
5, 26. Sheet P selectively taken out from 27, or manually fed paper P1, or envelope feeder 3
The envelope A fed from (A) is fed through the aligning roller pair 30, and the developer image previously formed on the photoreceptor 15 is transferred to the paper P or the envelope At by the movement of one transfer device. Next, the sheet ff1P or the sheet fffiA is peeled off from the photoconductor 15 by the peeling device 20, and sent through the conveyance path 24 to the fixing device 31.Here, the developer image is transferred to the paper P or the sheet P or the sheet fffiA. Envelope A
After being fused and fixed, the sheet is discharged onto the upper jogger 7 or the lower sheet discharge tray 12 whose discharge direction is assigned by the sheet discharge selector 32.

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 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 mechanism 54 is provided within the drive unit 51. This drive! [154 is a drive motor that rotates forward and backward (
A spiral shaft (shaft) 5 is connected to the rotating shaft of the drive motor 55 via gears 56 and 57.
8 are connected. A slider 59 serving as a connecting portion is screwed onto the spiral shaft 58, and the tips of the five sliders are inserted and connected to a locking hole 67 bored in the lower side of the inner plate 53. In addition, the inner plate 5
3 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 plays 1 to 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 light emitting and light receiving elements 73.
．． first and second optical detectors 75a consisting of 74;

75b. These first and second
The mounting positions of the optical detectors 75a and 75b are set narrower than the movement distance of the paper discharge plate 52. On the other hand, a tongue piece 76 is formed in a substantially central portion of the inner plate 53 as shown in FIG. This tongue piece 76 is the light emitting element 73 of the first or second detector 75a, 75b.
When the light receiving element 74 is located between the light receiving element 74 and the light receiving element 74, it is optically detected.

Further, an opening 77 is formed in one side of the unit 51 of the jogger 7 as shown in FIG. The spiral shaft 58 can be manually rotated by fitting it into a groove formed on the end face of the spiral shaft 58 and rotating it.

When a predetermined number of copied sheets P have been stacked on the paper ejection tray 52, an operation command is given to the drive motor 55 of the jogger 7, and the drive morph 55 is driven, for example, in the forward rotation, and the gears 56; The spiral shaft 58 is rotated in the forward direction via the . As a result, the five movers become spiral? The paper discharge tray 52 is moved in the direction of the arrow a along 1I158, and when it is moved by a predetermined amount, the second detector 75b detects the tongue 76 and the paper discharge tray 52 is stopped. When a predetermined number of image-formed M1P sheets are stacked on the paper ejection tray 52 at this position, the drive motor 55 is driven to rotate in the reverse direction, and the spiral shaft 58 is rotated in the reverse direction via the gears 56 and 57. When it is rotated and the slider 59 is moved in the direction indicated by the arrow, and the paper discharge tray 52 is moved a predetermined distance, the tongue piece 76 is detected by the first detector 75a and stopped. As a result, the stacking position of the paper P to be ejected next is changed. Thereafter, in the same manner, the paper ejection tray 52 is moved to change the stacking position until a predetermined number of sheets P are accumulated on the paper ejection tray 52.

As mentioned above, the spiral @ 58 (the slider 58 is screwed together and the slider 59 is operated along the axial direction by forward and reverse rotation of the spiral shaft 58 to reciprocate the paper ejection tray 52, so it is easy to use). The paper discharge tray 52 can be reciprocated reciprocally with the same configuration.

In addition, a spiral 58 is attached to the unit 51 of the jogger 7.
Since the operating opening 77 is provided, the spiral shaft 58 can be operated manually, and when the paper discharge tray 52 is locked, the lock can be released without disassembling the unit 51.

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 explained above, according to the present invention, the connecting portion is screwed onto the shaft, and by forward and reverse rotation of the shaft, the connecting portion is moved in the axial direction and the pedestal is reciprocated. The present invention does not require a clutch mechanism or the like, which simplifies the structure, reduces costs, and enables reliable driving.

[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), 5... Mover (j
1 knot), 58...shaft. Applicant's Representative Patent Attorney Nihiko Suzue Figure 1, Ward 2, Figure 3

Claims (2)

[Claims] (1) A device main body, and a holder provided on the device main body to receive paper on which an image is formed and to be discharged, and to change the stacking position of the paper by reciprocating the holder every time a predetermined number of sheets are accumulated. a connecting part connected to the cradle of the jogger; a shaft screwed to the connecting part; and a shaft that is rotated in forward and reverse directions to operate the connecting part to connect the cradle to the cradle. An image forming apparatus comprising: a drive source for reciprocating the image forming apparatus. (2) The image forming apparatus according to claim 1, characterized in that an opening for operating a shaft is provided in the jogger unit.