JPS612656A - Accumulator - Google Patents

Abstract

PURPOSE:To certainly reversal-transport a transported article, even if the length is different, by detecting the transported article by a detection means and inverting the transported article by operating a reversal guide body after the article passes through a rotary body for introduction. CONSTITUTION:A sheet P of paper is discharged from paper discharging rollers 42 and 42 and sent into the second transport passage 17 by a flip lever 18 turned upwardly. Then, a reversal detecting switch 67 detects the sheet of paper and sends a signal into a CPU, and after a certain time, a reversal solenoid 28 is operated to turn a reversal plate 26 in the direction of arrow around a supporting point 26, and a reversal plate roller 27 at the top edge is brought into revolution-contact with an auxiliary roller 25, and the rear edge of the sheet P of paper on the reversal plate 26 is pushed-up, and introduced between a transport roller 23 and the auxiliary roller 25. Therefore, the rear edge of the sheet P of paper is detected by the reversal detecting switch 67, and since the plate 26 is operated after the sheet P of paper passes through the transport roller 23, the sheet of paper is prevented from bein caught by the transport roller 23, even if the length of the sheet of paper is different.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a stacking device that is installed in an electronic printing device such as a copying machine or an electronic printer, and stacks sheets on which images are formed and then discharged.

[Technical background of the invention and its problems]

Generally, in a copying machine, as shown in FIG. 1, a sheet of paper P, which is a conveyed object, is fed from a paper cassette 1 to an image forming section, an image is transferred thereon, and then the paper is ejected from an ejection port 2. This is arranged to be accumulated on a tray 3.

By the way, the paper P is discharged to the tray 3 with the image plane P' facing upward so that the image plane P' can be seen immediately.

However, if the sheets P are stacked in the tray 3 with the image side P' facing up, the order of the sheets P will be reversed to the order of copying, and when performing page alignment, the order of the stacked sheets P will be changed again. This was a time-consuming process.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to automatically align the pages of the conveyed object by inverting it and ejecting it to the ejection tray. The object of the present invention is to provide a stacking device that can reliably reversely transport even objects of different lengths.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention includes a reversing means for introducing a conveyed object on which an image is formed and conveyed by an introduction rotary body, and for reversing it by a reversing guide body and guiding it to an output tray. The apparatus also includes a detection means for detecting the introduced conveyed object and operating the reversing guide body after the object passes through the introducing rotating body.

[Embodiments of the invention]

The present invention will be described below with reference to an embodiment shown in FIGS. 2 to 9. In the figure, reference numeral 11 denotes a main body of the electronic copying machine, and a document table 12 is provided on the upper surface of the main body 1. Also,
A paper feed cassette 13 is provided at the lower part of one side of the main body 1 for supplying paper P as an object to be conveyed, and a paper feed cassette 13 for supplying paper P as an object to be transported is provided on the other side, as shown in FIG. An accumulation device 15 is provided. Further, an image forming section (not shown) is provided in the main body 1, where an image is transferred onto the paper P supplied from the paper feed cassette 13, and then transported toward the stacking device 15. It looks like this.

By the way, the above-mentioned integration device 15 is constructed as shown in FIGS. 3 to 6. That is, this accumulation device 15 has first to third conveyance paths 16° 17.19, and the first conveyance path 16 and the second conveyance path 12 are connected to each other by a flip lever 18.
It is designed to be selectively opened and closed. The flip lever 18 is operated by a flip lever solenoid 78 shown in FIG. Also, above! J1 conveyance path 1
6 and the second conveyance path 17 are communicated via a third conveyance path 19. A pair of paper ejection rollers 20, 20 are provided at the terminal end of the conveyance path 16, and this paper ejection roller 2
A discharge detection switch 2 is provided on the carry-in side of 0°20, and a full detection switch 22 is provided on the discharge side.

Further, a reversing means A is provided on the discharge side of the second conveyance path 17. This reversing means A is equipped with rotating bodies 101 and 102 for introduction and ejection. The rotating body 1
01 is constituted by a conveying roller 23 and a retaining roller 24 that is in rolling contact with the lower side of the conveying roller 23.

Further, the rotating body 102 is composed of a conveying roller 23 and a retaining roller 25 that rolls into contact with the upper side of the conveying roller 23. The conveyance roller 23 is commonly used as a rotary body for introduction and discharge. Further, on the surface of the conveyance roller 23, grooves 23a for biting are formed as uneven portions. Further, on the carry-in side of the conveyance roller 23, a reversal detection switch 6 as a detection means is provided.
7 is provided, and this reversal detection switch 6.7 detects the trailing edge of the sheet P to be introduced, and then switches the reversing plate 2 to be described later.
It is designed to operate 6.

Further, a reversing plate 26 as a reversing guide body is rotatably provided on the unloading side of the conveying roller 23 via a fulcrum 26a, and a reversing plate roller 27 is integrally provided with the rotational axis of the reversing plate 26. It is set in. The reversing plate 26 is rotated by a reversing solenoid 28 to bring the reversing plate roller 27 toward and away from the retaining roller 25.

Further, in the main body 11, there is provided a paper discharge path 4 for conveying the paper P on which an image has been formed toward the stacking device 15. A feed roller 42, an exit switch 43, and a paper discharge roller 44 are arranged in this order.

On the other hand, 29 is an ejection tray 29 that receives the paper P ejected from the first conveyance path, and this ejection tray 29 is connected to the main body 1.
It is provided in a state of being inclined diagonally upward with respect to 1,
A rising portion 29a is integrally formed at the rear end of the discharge tray 29. Further, a sub-tray 30 is provided on the lower side of the discharge tray 29 in parallel thereto. The discharge tray 29 is placed on the upper surface of the slider 31 constituting the variable means B, as shown in FIG. An engagement recess 32.32 is formed on the upper surface of the slider 3,
Projections 33, 33 protruding from the bottom surface of the tray 29 are removably engaged within these engaging recesses 32, 32. That is, the tray 29 is detachably attached to the slider 3. Further, both sides of the slider 31 are provided with a rotation link 34 and a bracket 35.
One rotation ring 3 is supported by the frame 36 via
4 is connected to one end of a connecting rod 37 via a link pin 342. A half-rotation spring clutch 39 is connected to the other end of the connecting rod 37 via a crank pin 38 to form a crank mechanism. Further, this half-rotation spring clutch 39 is connected to an output shaft 50 of a motor 49 via a drive shaft 46 and bevel gears 47, 48, as shown in FIG.

The drive shaft 46 is held by the frame 36 via a bracket 51. Further, a solenoid 63 held by a bracket 52 is provided at the lower part of the half-rotation spring clutch 39, and an operator 54 of this solenoid 53 controls the spring clutch 39.
9 is stopped every half rotation.

Further, the output shaft 50 of the motor 49 is provided with a splot 56 as shown in FIG. Sprockets c; oa and rrob are connected to I/. Further, a gear 74 is attached to the shaft 59 of the retaining roller 25.
This tooth jlf74 is meshed with a gear 76 attached to the shaft 73 of the retaining roller 24 via a gear 75 attached to the shaft 72 of the feed roller 23. That is, the reversing means A and the variable means B are driven by the power of the same motor 49.

On the other hand, the above device is controlled by a control system as shown in FIG. That is, 61 in the figure is a microcomputer, and this microcomputer 61 includes a central control unit CPU62, I10 ports 53a and 63b, a program control unit ROM64, and a data recording unit RAM6.
It is equipped with 5. The above CP 'U e,? A control unit 66 of the copying machine is connected to the I10 boat 63a, and a reversal detection switch 67, a discharge detection switch 2, and a full detection switch 20 are connected to the I10 boat 6.9b. ing. Further, a driver 70 is connected to the CPU 62 via an I10 boat 63b,
The driver 7θ operates the motor 491, the reversing solenoid 28, the rotary clutch 39, and the blip lever solenoid 78. Furthermore, 71
is a voltage regulator.

In the above-described configuration, a case where a plurality of sheets of originals are copied one by one will be explained in terms of l and %. At this time, the paper P on which the electronically copied image has been formed is reversely fed along the conveyance path 41 (2) in the main body 11, and the intermediate output loss switch (f-43) is operated. A signal is output, and this output signal is transferred to the CPU 6z via the I10 port 63a, and this CPU
62 is the driver 7 via the output I10 boat 63b.
0 causes the flip lever solenoid 78 to be set to 1 and operates the motor 49 in the discharge tray 29. The flip lever 18 is rotated upward by the operation of the solenoid lever solenoid 78, and the motor 49 is also operated. The conveying roller 23, the retaining rollers 24, 25, and the tray ejecting roller 2 are connected via the chain 57.
0 and 20 are rotated respectively.

In this state, the paper P is transferred to the paper ejection roller 4 as shown in FIG.
2.42, and sent to the second conveyance path 17 by the flip lever 18 rotated upward. The paper P sent into this second conveyance path 11 is transferred to the reversal detection switch 6
7, this signal is sent to the CPU 62 via the I10 port 63b, and is held within the CPU 62 for a certain period of time (
(from when the trailing edge is detected until the trailing edge of the paper P leaves the conveyance roller 23) is counted, and then a signal is output to the driver 70 to operate the reversing solenoid 28. As a result, the reversing solenoid 28 operates and the reversing plate 26
rotates around the fulcrum 26a as shown by the arrow, and the reversing plate roller 27 at its tip rolls into contact with the backing roller 25, pushing up the trailing end of the paper P on the reversing plate 26, and pushing up the reverse feed roller 23 and the backing roller. It will be introduced between 25 and 25. Then, after the reversing solenoid 28 is held in the operating state for a certain period of time, the excitation of the reversing solenoid 28 is released by a signal from the CPUez, and the reversing plate 26 is rotated downward to return to the initial state.

The holding time of the reversing solenoid 28 is sufficient until the trailing edge of the paper P is held between the conveyance roller 23 and the backing roller 25, and after that, it is transferred to the third conveyance path 19 by these two rollers 23 and 25. The paper is conveyed and discharged onto a discharge tray 29 by paper discharge rollers 20, 20.

By repeating the above operations, the paper that was ejected with the copy side upward is ejected and stacked on the tray 29 with the copy side downward, and the pages are arranged in the order of copying. .

Note that while the paper P is being reversed and being transported by the transport roller 23 and the backing roller 25, the reversing plate 26 is rotated downward, so the next sheet P is transferred to the subtray 30 by the transport roller 23 and the backing roller 24. transported.

Next, a case will be described in which a plurality of copies of a plurality of original documents are to be copied, for example, ten copies each. At this time, the sheets P are ejected to the ejection tray 29 in the same manner as described above, but when 10 sheets are ejected and stacked, a signal is sent from the control section 66 and the solenoid 53 is operated by the driver 70. The clutch 39 is connected, and the power of the motor 49 is transmitted to the clamp bin 38 via the bevel gears 4B, 47, the drive shaft 44, and the clutch 39, causing it to rotate eccentrically. As a result, 1. As shown in FIG. 4, the connecting rod 37 moves and the rotating arm 3
4 rotates as shown by the two-dot chain line, and slider 3 moves horizontally! The accumulation position can be varied by moving away.

Thereafter, in the same manner as described above, when the second document is copied, for example, 10 sheets and discharged and stacked, it is stacked in a state shifted to the top surface of the first stacked copy P.

Thereafter, by repeating the movement of the discharge tray 29 in the same manner to continue stacking, the sheets are stacked in groups of 10 sheets.

Next, the case of normal paper ejection, that is, the case of printing only one sheet, will be explained.

In this case, a signal is sent from the control unit 66 to the driver 7 to de-energize the flip lever solenoid 78,
As shown in FIG. 9, the flip lever 18 rotates downward, and the paper P passes through the transport path 16 of Sl and is ejected by the ejection roller 20 without being reversed. As a result, the paper is ejected onto the ejection tray 29 with its copy side facing up.

As described above, this embodiment includes the reversing means A that reverses the paper P and guides it to the output tray 29. Therefore, when a plurality of originals are to be continuously copied, the image forming surface is The pages can be discharged onto the discharge tray 29 with the pages facing downward, and can be stacked in the order of the pages.

In addition, since the reversal detection switch 67 detects the trailing edge of the paper P and operates the reversing plate 26 after the paper P passes the transport roller 23 to reverse the paper P, even if the length of the paper P is different, the paper P is transported. It can be reliably reversed without being caught by the rollers 23.

In addition, the reversing roller 22 of the reversing plate 26 is brought into contact with the backing roller 25 to introduce the paper P between the backing roller 25 and the conveyance roller 23 and then returning the paper P.
transportation becomes reliable.

Further, the reversing plate 26 returns after the reversing operation of the paper P is completed and guides the newly introduced paper P to the sub-tray 30, so that even if the paper P is continuously fed, it can be inverted and conveyed one after another. I can do it.

Note that the present invention is not limited to the above embodiment,
Of course, various modifications can be made within the scope of the gist.

〔Effect of the invention〕

As explained above, the present invention reverses the conveyed objects on which images are formed and discharges and stacks them on the discharge tray, so that the conveyed objects can be automatically stacked in the order of their pages, thereby eliminating the need for the operator's work. Never.

In addition, since the conveyed object is detected by the detection means and passed through the introduction rotary body, the first reversing guide body is operated to reverse the conveyed object, so that conveyed objects of different lengths are carried in. It also has the effect that it can be reliably conveyed in reverse.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional example, Figs. Fig. 4 is a partially cutaway front view showing the variable means, Fig. 5 is a diagram of the part M1, Fig. 6 is a block diagram showing the drive system, and Fig. 7 is a control system. FIG. 8 is an explanatory diagram showing an inversion operation, and FIG. 9 is an explanatory diagram showing a non-inversion operation. P...Paper (transferred object), 29...Ejection tray, A
. . . Reversing means, 67 . . . Reversing detection switch (detection means), 101 . . . Rotating body for introduction. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 7 Figure 8

Claims (4)

[Claims] (1) In an apparatus in which conveyed objects with images formed thereon are discharged and accumulated on an ejection tray, the conveyed objects are introduced by a rotating body for introduction, are reversed by a reversing guide body, and then transferred to the ejection tray. an accumulating device comprising: a reversing means for guiding the transported object; and a detecting means for detecting the introduced conveyed object and operating the reversing guide body after the object passes through the introducing rotating body. (2) The stacking device according to claim 1, wherein the guide body is operated after a predetermined period of time has elapsed after the rear end of the conveyed object introduced into the detection means is detected. (3) It is characterized by comprising a sub-tray that temporarily stores the transported object introduced from the introduction rotary body and an unloading rotary body that transports the transported object from the sub-tray toward the ejection tray. An integrating device according to claim 1 or 2. (4) A patent characterized in that the reversing guide body guides the conveyed object in the sub-tray to the unloading rotary body and then returns to guide the conveyed body introduced from the introducing rotary body to the sub-tray. An integrating device according to claim 3.