KR100761105B1 - Sheet buffer apparatus - Google Patents

Abstract

A sheet buffer apparatus is provided to realize a sheet buffer function on a sheet transfer passage simply without installing a separate complex unit. In a sheet buffer apparatus, a paddle(11) for smoothly transferring a sheet is provided on the upper side of a sheet guide unit. A sheet entering unit includes a sheet entering roller(7a) and a sheet entering idle roller(7b) making contact with the sheet entering roller. A sheet discharge unit includes a sheet discharge roller(14a) and a sheet discharge idle roller(14b) making contact with the sheet discharge roller. A drive unit includes a timing belt(9) and a drive motor. The paddle, the sheet entering roller, and the sheet discharge roller are simultaneously driven by the timing belt.

Description

Sheet buffer apparatus

1 is a view for explaining the structure of a general paper processing apparatus,

Figure 2 is a three-dimensional view of the paper buffer device of the present invention from one side,

Figure 3 is a three-dimensional view of the paper buffer device of the present invention from another side,

4 is a plan view of the paper buffer device of the present invention;

Figure 5 is a side cross-sectional view for explaining the structure of the paper buffer device of the present invention,

6A to 6H are side sectional views for explaining the operation process of the paper buffer device of the present invention.

* Description of the symbols for the main parts of the drawings *

1-Paper Handling Unit 2-Binder

3-Stacker 4-Paper Path

5-Paper buffer device 16a, 16b-Paper sensor

7a-Paper Entry Roller 7b-Paper Entry Idle Roller

8-Drive motor 9-Timing belt

10-Timing belt tension roller 11-Paddle

21, 24, 27, 80-gear 13-drive motor

14a-paper eject roller

14b-Idle Roller 15-Magnetic Clutch

17-compiler 25,26-guide

30a, 30b-Spring device 31,34,37-Shaft

50,60-Middle gear 70-Drive shaft

The present invention relates to a paper processing apparatus which is a peripheral device of an image forming apparatus such as a printer, a copying machine, a printing press, and the like.

More particularly, the present invention relates to the construction of a paper buffer device that allows the leading edges of the papers to be discharged in a stepped manner at regular intervals on the paper transport path of the paper processing device.

In general, an image forming apparatus (not shown) such as a copying machine is combined with a paper processing apparatus 1 for reprocessing (post-processing) a paper on which work is completed from the image forming apparatus as shown in FIG. 1.

The paper processing apparatus includes, for example, a binder 2 for binding paper discharged from the image forming apparatus, a compiler 17 for waiting for paper to be loaded before binding, and a paper transport for transferring paper to the compiler. A furnace 4 is configured, and a stacker 3 or the like for discharging and loading the finished paper to the outside is configured.

A general paper processing apparatus constructed as such a system stops the transfer of paper on the paper feed path 4 and maintains the standby state while the paper is arranged on the compiler 17 and bound to the binder 2. .

Therefore, in the conventional general paper processing apparatus, since the transfer of the paper is stopped while the loaded paper is aligned and bound, the work efficiency of the paper processing device decreases and the processing speed is delayed by the interrupted time.

In particular, when reprocessing by setting a small number of sheets, the waiting cycle of the paper is accelerated on the paper conveying path, so that the overall waiting time becomes longer, and the processing efficiency of the paper processing apparatus is significantly reduced.

The present invention has been made to solve the above problems,

A paper buffer device capable of buffering a certain number of sheets on a sheet conveying path of the sheet processing apparatus is configured.

The paper buffer device of the present invention comprises a paper entry roller 7a and a paper entry idle roller 7b abutting on the paper entry roller as shown in Figs. 1 to 5, and a position separated by a predetermined distance from the paper entry roller. Between the paper discharge roller 14a controlled by the magnetic clutch 15 and the paper discharge idle roller 14b in contact with the paper discharge roller, between the paper entry roller and the paper discharge roller. The paddle 11 is configured, the timing belt 9 and the driving motor 13 configured to simultaneously drive the paper entry roller, the paper discharge roller, and the paddle, and the upper end of the paper entry roller and the Paper detection sensors 16a and 16b respectively formed on the upper end of the paper ejecting roller are provided on the paper transport path 4, and the magnetic clutch is turned on / off in response to a signal of the paper detection sensor. It is configured to drive off to control the drive timing of the paper discharge roller 14a.

According to the present invention, a paper buffer device having the above structure is configured on a paper conveying path, so that the paper conveyed through the paper conveying path is not delayed and buffered in such a manner that the leading edges of the papers overlap each other at regular intervals at regular intervals. It can be quickly discharged between the paper discharge roller and the paper discharge idle roller.

Accordingly, it is an object of the present invention to provide a paper buffer device capable of buffering and discharging papers without delay of paper transfer.

Still another object of the present invention is to provide a paper buffer function at a simple and low cost on a paper conveyance path of a paper processing apparatus.

 It is still another object of the present invention to improve the work efficiency of the paper processing apparatus by reducing the transfer delay of paper generated in the paper buffering process to a minimum.

In order to achieve the above object, the paper buffer device of the present invention comprises a paper conveying path 4, a paper entering means provided on the paper conveying path, and a paper ejecting means formed at a position separated by a predetermined distance from the paper entering means. A driving means for driving the paper entry means and the paper ejecting means, a clutch means for controlling the driving of the paper ejecting means, and a sheet having passed through the paper entering means between the paper entering means and the paper ejecting means in order; And a paper guide means for guiding the paper so that the paper can be stacked according to the present invention, and at least one paper sensor for detecting the transfer of the paper at a predetermined position on the paper transport path.

The on / off cycle of the clutch means is controlled according to the signal of the sheet sensor so that the front end of each of the stacked sheets passes through the sheet discharging means in a state where the front ends of the stacked sheets overlap each other stepwise. It is done.

In addition, the paddle 11 for smoothly conveying the paper is characterized above the paper guide means.

The paper entry means is composed of a paper entry roller 7a and a paper entry idler roller 7b in contact with the paper entry roller, and the paper discharge means comprises a paper discharge roller 14a and a paper discharge roller. It consists of a paper discharge idle roller (14b) in contact with, the drive means is composed of a timing belt (9) and a drive motor (13) by the timing belt, the paddle (11) and the paper entry roller (7a) ) And the paper discharge roller 14a are configured to be driven at the same time.

Further, the spring entering idle rollers 7b and the paper ejecting idler rollers 14b are supported by spring devices 30a and 30b, respectively, being pressed toward the surfaces of the paper entering rollers 7a and the paper ejecting rollers 14a. Respectively).

In addition, the clutch means is characterized by consisting of a magnetic clutch provided between the paper discharge roller and the rotating shaft of the roller.

In addition, the paper guide means is that the lower guide plate 26 located below the paper entry roller 7a is lower than the lower guide plate 25 of the paper transfer path located above the paper entry roller 7a. Characterized in that configured to be stepped.

In addition, the paper sensor is characterized in that it is installed at the upper position of the paper entry roller.

In addition, the paper sensor is characterized in that it is additionally installed at the upper position of the paper discharge roller and configured to detect the discharge of the paper loaded by the additionally installed paper sensor.

2 to 6, the technical configuration and operation of the paper buffer device of the present invention will be described.

Figure 2 is a three-dimensional view of the paper buffer device of the present invention from one side, Figure 3 is a three-dimensional view of the paper buffer device of the present invention from another side, Figure 4 is a plan view of the paper buffer device of the present invention, Figure 5 is a side cross-sectional view for explaining the structure of the paper buffer device of the present invention.

6A to 6H are side sectional views for explaining the operation process of the paper buffer device of the present invention.

 The paper buffer device 5 of the present invention has a paper entry roller 7a configured at the lower end of the paper feed path 4, and an paper entry idle roller installed in contact with the roller surface so as to be driven by the rotation of the paper entry roller. Paper entry means constituted by 7b). The paper entry idle roller 7b is coupled to the spring device 30a so as to rotate in a state of being biased toward the surface of the paper entry roller.

A paper discharge idler roller provided in contact with the surface of the roller to be driven by the rotation of the paper discharge roller 14a and the paper discharge roller at a position spaced apart from the paper entry roller and the paper entry idle roller by a predetermined distance ( And sheet discharging means constituted by (14b). The paper discharge idle roller 14b is attached to the spring device 30b so as to rotate in a state of being biased toward the surface of the paper discharge roller like the idle roller for paper entry.

A paddle 11 is formed at a predetermined position between the paper entry roller 7a and the paper discharge roller 14a to smoothly guide the paper conveyed from the paper entry roller side toward the paper discharge roller 14a. Do it.

The paper entry rollers 7a, the paper discharge rollers 14a, and the paddles 11 may rotate along the rotation shafts 37, 34 and 31 on which the gears 27, 24 and 21 are fixed, respectively. It is installed so that. In particular, a magnetic clutch 15 for controlling the rotational force transmitted from the gear 24 to be selectively transmitted to the paper discharge roller 14a is installed on the rotary shaft 34 that fixes the paper discharge roller 14a.

Since the magnetic clutch 15 may use a known general technique, a detailed technical description thereof will be omitted.

The gear 24 fixed to the rotary shaft 34 and the gear 21 fixed to the rotary shaft 31 are

It is meshed so as to be rotatable through the intermediate gears 50 and 60.

On the other hand, the gear 80 is installed on the drive shaft 70 of the drive motor 13, so that the rotational power is simultaneously transmitted to the gears 80, 27 and the intermediate gear 50 by using the timing belt (9). The paper entry roller 7a, the paddle 11, and the paper discharge roller 14a can be driven simultaneously. As described above, the paddle 11 and the paper discharging roller 14a are indirectly driven by the intermediate gears 50 and 60. However, the present invention is not limited to this structure. It may be configured to be driven directly by using a power transmission device.

In addition, in order to maintain proper tension and tension of the timing belt 9, a tension roller 10 of the timing belt is provided.

Further, the lower guide plate 25 of the paper feed path located on the upper portion of the paper entry roller 7a so that the paper passing between the paper entry roller 7a and the paper entry idle roller 7b can be stacked in order. The lower guide plate 26 located below the paper entry roller 7a is configured to be stepped lower.

By setting the guide plate 26 lower than the upper guide plate 25 on the basis of the paper entry roller 7a as described above, the paper passing through the paper entry roller 7a can be accurately lowered without reversing the order. It is guided to be loaded on the guide plate 26.

In addition, in the vicinity of the paper feed path 4 located at the upper end of the paper entry roller and the paper discharge roller 14a, the paper detection sensors 16a and 16b can detect the transfer, discharge and jam of the paper. Is installed.

An operation process of the paper buffer device of the present invention configured as described above will be described in detail with reference to FIGS. 6A to 6H.

First, the paper entry roller 7a, the paper entry idle roller 7b, and the paddle 11 are rotated by the drive motor 13, and the paper discharge roller 14a and the paper are driven by the magnetic clutch 15. In the state in which the idle idle roller 14b is stopped, when the first sheet S1 is transferred toward the sheet feeder 4 as shown in FIG. 6A, the sheet sensor 16a detects the sheet S1, and the signal thereof. When transmitting to the central control unit (not shown), the central control unit to operate the magnetic clutch 15 after a predetermined time by the operator to transmit the rotational power to the paper discharge roller (14a) for a predetermined time.

In the state of FIG. 6A, when the paper S1 passes between the paper entry roller 7a and the paper entry idle roller 7b and descends toward the paddle 11, the paper S1 is rotated by the paddle 11 as shown in FIG. 6B. The front end portion can be smoothly guided to the paper ejecting roller.

Subsequently, when it is conveyed toward the paper discharge roller 14a as shown in Fig. 6C, the magnetic clutch 15 is operated, and the front end of the paper S1 is the paper discharge roller 14a and the paper discharge during the driving timing of the magnetic clutch 15. It is engaged with the idle idle roller 14b and starts to be discharged. The rotation of the paper ejecting roller 14a is stopped while the tip of the paper S1 slightly protrudes between the paper ejecting roller 14a and the paper ejecting idler 14b, thereby completing the buffering of the paper S1.

At this time, in a state where the paper S1 is buffered in the paper buffer device as shown in FIG. 6C, the rear end of the paper S1 may completely exit the paper entry roller 7a and the paper entry idle roller 7b and be seated on the guide plate 26. The drive timing of the magnetic clutch must be set.

Subsequently, even when the rotation of the paper ejecting roller 14a is stopped, the paper entry roller 7a continues to rotate in accordance with the driving of the driving motor 13, and thus the second paper S2 subsequent to the paper S1 as shown in FIG. 6D. The paper passes down between the paper feed roller 7a and the paper feed idle roller 7b from the paper feed path 4 side.

The paper S2 is detected by the paper detection sensor 16a similarly to the paper S1, and after a predetermined time, the magnetic clutch 15 is restarted so that the paper discharge roller 14a is driven for a predetermined time.

Subsequently, when the leading end of the second paper S2 is moved toward the paper ejecting roller 14a as shown in Fig. 6E, the leading end of the paper S2 is ejected from the paper ejecting roller 14a and the paper ejecting during the driving timing of the magnetic clutch 15 to be restarted. The paper is discharged with the first idler roller 14b being discharged together with the first sheet S1, and the tip of the sheet S2 slightly protrudes between the sheet ejecting roller 14a and the sheet ejecting idler 14b. The rotation of the roller 14a stops. Therefore, the sheet S1 is in a state where the sheet S2 is discharged earlier by the distance C discharged from the sheet discharge roller 14a. The preceding distance C between the sheets can be arbitrarily adjusted by setting the operation timing of the magnetic clutch, that is, the driving timing of the paper discharge roller 14a.

Subsequently, even when the rotation of the paper ejecting roller 14a is stopped after the second paper S2 is buffered, as shown in Fig. 6F, the third paper S3 subsequent to the paper S2 is the paper entry roller 7a from the paper conveying path 4 side. And it passes down between the paper entry idle roller (7b).

The third sheet S3 is detected by the sheet sensor 16a similarly to the sheets S1 and S2, and after a certain time, the magnetic clutch 15 is operated so that the sheet ejecting roller 14a operates for a predetermined time.

Subsequently, when the front end of the third paper S3 is conveyed toward the paper ejecting roller 14a as shown in FIG. 6G, the magnetic clutch 15 starts to be restarted again, and the front end of S3 is ejected during the driving timing of the magnetic clutch 15. Engages with the roller 14a and the paper discharge idle roller 14b and starts to be discharged together with the sheets S1 and S2. The rotation of the paper discharge roller 14a is stopped in the state where the tip of the third paper S3 protrudes slightly between the paper discharge roller 14a and the paper discharge idle roller 14b. Therefore, the sheets S3, S2, and S1 are discharged in a state of being stacked in stairways at intervals C, respectively.

In the state of FIG. 6G, for example, if the paper is set to buffer and eject three sheets of paper, the paper sensor 16a detects the third paper S3 and buffers the paper ejecting roller 14a by rotating the paper ejecting roller 14a after a certain time. It is necessary to control the driving timing of the magnetic clutch so that the three sheets of paper can be completely discharged. If the fourth paper is to be buffered further, the same process as the buffering process of the paper S3 may be performed.

The discharge state of the buffered paper is sensed by the paper sensor 16b, and while the buffered paper S1, S2, S3 is discharged, the first paper S4 of the second lot, as shown in FIG. Supplied through 4).

In the paper buffer device of the present invention having a buffering function configured on the paper conveying path 4 as described above, when the paper buffer is discharged one by one without buffering and then discharging the paper one by one, the paper discharge roller 14a is a paper entry roller ( The driving timing of the magnetic clutch 15 may be controlled to be always driven together with 7a).

The paper buffer device 5 of the present invention comprises a paper entry roller 7a and a paper entry idle roller 7b in contact with the paper entry roller, and a magnetic clutch 15 located at a distance apart from the paper entry roller. A paper discharge roller 14a whose drive is controlled by the < RTI ID = 0.0 > and a paper discharge idler 14b < / RTI > in contact with the paper discharge roller, and a paddle formed between the paper entry roller and the paper discharge roller. 11), a timing belt 9 and a driving motor 13 configured to drive the paper entry roller, the paper discharge roller, and the paddle at the same time, and a paper provided on the paper conveying path 4. And sensing sensors 16a and 16b and configured to control driving timing of the paper discharge roller 14a by driving the magnetic clutch on / off according to the signal of the sheet sensor. As,

It is possible to obtain the effect of quickly buffering paper and discharging it without delay of paper feeding.

In addition, it is possible to obtain the effect of configuring the paper buffer function at a simple and low cost on the paper conveyance path without installing a complicated device.

Claims (8)

delete delete A paper conveying path, a sheet entering means provided on the sheet conveying path, a sheet ejecting means configured at a position separated by a predetermined distance from the sheet entering means, a driving means for driving the sheet entering means and the sheet ejecting means; Clutch means for controlling the drive of the paper ejecting means, paper guide means for guiding the paper so that the paper passing through the paper entering means can be stacked in sequence between the paper entering means and the paper ejecting means; And at least one paper detection sensor for detecting a paper transfer at a predetermined position on the paper conveying path, and the on / off cycle of the clutch means is controlled according to the signal of the paper detection sensor to stack the stacked paper. It is configured to pass through the paper discharging means in the state that each tip of each of them is overlapped on the steps at predetermined intervals. It is in the media buffer device, Above the paper guide means, a paddle 11 is formed to facilitate the transfer of paper, and the paper entry means comprises a paper entry roller 7a and a paper entry idle roller 7b in contact with the paper entry roller. The paper dispensing means comprises a paper discharging roller 14a and a paper discharging idle roller 14b in contact with the paper discharging roller. The driving means includes a timing belt 9 and a driving motor 13. The paper buffer device, characterized in that the paddle (11), the paper entry roller (7a) and the paper discharge roller (14a) is driven at the same time by the timing belt. The method of claim 3, The clutch means is a paper buffer device, characterized in that consisting of a magnetic clutch provided between the paper discharge roller and the rotating shaft of the roller. The method of claim 3, The paper guide means is provided such that the lower guide plate 26 located below the paper entry roller 7a is lower than the lower guide plate 25 of the paper transfer path located above the paper entry roller 7a. Paper buffer device, characterized in that is configured. The method of claim 3, The paper entry idle roller 7b and the paper eject idle roller 14b are respectively supported by spring devices 30a and 3b which are pressed toward the surface of the paper entry roller 7a and the paper ejecting roller 14a. Paper buffer device, characterized in that coupled to each. The method of claim 3, The paper detection sensor is a paper buffer device, characterized in that installed in the upper position of the paper entry roller. The method of claim 7, wherein And the paper sensor is additionally installed at an upper position of the paper discharge roller and configured to detect discharge of paper loaded by the additionally installed paper sensor.

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