JPS63262351A - Automatic sheet feeding mechanism - Google Patents

Abstract

PURPOSE:To selectively feed two different recording mediums to a recording device or a reading device, by a method wherein a feed roller is selectively driven in a forward or a reverse direction, and a separation material is selectively pressed against the feed roller. CONSTITUTION:Two sets of feed means 2 and 3 are mounted to a feed roller 1, a sheet 16a in a lowermost layer of a recording sheets 16 accumulated on a tray 14 is fed in a direction C by means of the forward-rotating feed roller 1, and is pressed against the feed roller 1 through the medium of a flexible separation rubber plate 4. In this case, since a friction force produced by the separation rubber plate 4 is high, a multiplex feed of the sheets is prevented from occurring. The separation rubber plate 4 is pressed against the roller 1 through the force of a spring 12. When the feed means 2 is rested and the feed means 3 is in an operative state, a solenoid valve 8 is excited, and a press metal 6 is lifted up in the direction E.

Description

[Detailed Description of the Invention] [Summary] A paper feeding mechanism for a recording medium according to the present invention includes a single paper feeding roller that is controlled in forward and reverse directions, and a paper feeding mechanism provided at opposing positions on the outer periphery of the paper feeding roller. a plurality of paper feeding units arranged in the same direction, and means for selectively pressing a recording medium separating member attached to the paper feeding unit against the paper feeding roller in response to forward and reverse rotation of the paper feeding roller, respectively. Then, one of the plurality of paper feeding units operates to feed the recording medium.

[Industrial application field]

The present invention relates to a paper feeding mechanism for recording media used in facsimile machines and the like. More specifically, the present invention relates to an improvement in an automatic paper feeding mechanism that feeds multiple types of recording media.

[Conventional technology]

In a conventional automatic paper feeding mechanism that feeds a recording medium onto its conveyance path, a pair of recording medium feeding means and a paper feeding roller are arranged in pairs.

Therefore, a single print head or read head
When feeding two types of recording paper or a recording medium with information written on it, i.e., an original, two sets of paper feed rollers are required for each, which occupies a large space. This was an obstacle to pricing.

FIG. 7(a) is a schematic configuration diagram showing a conventional example of an automatic paper feeding mechanism, in which two types of recording paper 21 of A4 size and 84 size recording paper of different sizes are stored in trays 25 and 26, respectively. This is an automatic paper feeding mechanism that selectively feeds the paper sheets 22 and 9 to the same conveyance path 31 for printing.

For example, the A4 size recording paper 21 is
At step 3, the sheet is taken out from the single-sheet tray 25, passed through the guide 27, sent by the conveyance roller 29, and conveyed to the m conveyance path 31. At this time, other trays 26. Paper feed roller 24.
! The feeding mechanism constituted by the feeding roller 30 is at rest.

On the other hand, the B4 size recording paper 22 is placed on the paper feed roller 2.
At step 4, the sheet is taken out from the single-sheet tray 26, sent through the guide 28 by the conveyance roller 30, and conveyed to the conveyance path 31.

FIG. 7(b) is a schematic configuration diagram showing another conventional example of an automatic paper feeding mechanism, and is an example having two sets of conveyance paths. This is an automatic paper feeding mechanism that feeds the recording paper 37 and original document 35 stored in the set table 36 to the respective transport paths 32 and 33 for printing.

The recording paper 34 is taken out from the single-sheet setting table 36 by a paper feed roller 37, sent through a guide 38 by a conveyance roller 4°, and conveyed to a conveyance path 32. on the other hand.

The original document 35 is taken out from the single-sheet setting table 36 by a paper feed roller 37, is conveyed via a guide 39 by a conveyance roller 40, and is conveyed to the m conveyance path 33. Reference numeral 36a denotes a separating rubber plate which is pressed against the paper feed roller 37 by a spring 36b.

[Problem that the invention seeks to solve]

In the conventional automatic paper feeding mechanism, as shown in FIGS. 7(a) and 7(b), it is obvious that two sets of paper feeding rollers are provided for two sets of paper feeding units, and there are 9 attachments (not shown). In addition to the drive mechanism, the devices tend to become more complex and larger, which is an obstacle to miniaturization and cost reduction of the automatic paper feeding mechanism.

[Means for solving problems]

As shown in FIG. 1, this is a paper feeding mechanism for a recording medium 16, 17 that includes a plurality of paper feeding units 2.3, including a paper feeding roller 1 that is controlled in forward and reverse directions, and a A medium light having a recording medium 16, 17 supply end and a recording medium separating member 4.5 provided at opposing positions on the outer periphery is mounted on a stage 14.
15, and means 8.9 for selectively pressing the recording medium separation member 4.5 against the paper feed roller 1 in response to forward and reverse rotation of the paper feed roller 1, respectively.

[Effect]

FIG. 2 is an explanatory diagram showing the operation of the automatic paper feeding mechanism, which is an extension of the present invention shown in FIG. 1. As shown in FIG. A feeding means 2.3 is provided which separates the stacked recording media 16, 17 for each type of paper one by one and automatically feeds them sequentially into the conveyance path. is pressed by the pressing forces P and Q applied by the pressing means 8°9 to the paper feed roller 1 rotating nine times via the separating rubber plate 4.5, and the recording medium 16.17 and the paper feed roller 1 are pressed together. The recording media are separated from the stack by the difference in the frictional forces between them and the recording media 16.17.

In FIG. 2(a), recording sheets 16 and 17 stacked on trays 14 and 15 disposed above and below the paper feed roller 1 are fed by the paper feed roller 1 in directions C and D.

In FIG. 2(a), the paper feed roller 1 is rotating normally (in the counter-hour direction A). The feed means 2 is disposed above the paper feed roller 1 in response to the normal rotation of the paper feed roller 1, and feeds the lower recording paper 16a of the recording paper 16 one by one to C.
Send in the direction. At this time, a pressing force P is applied to the recording paper 16 via the separation rubber plate 4, and the recording paper 16
Helps separate a. The outlet of the feeding means 2 is oriented in the C direction.

In FIG. 2(b), the paper feed roller 1 rotates in the reverse direction (hour hand direction B), and the recording medium feeding means 3 rotates the paper feed roller 1 in response to the reverse rotation of the paper feed roller 1. It is disposed on the lower side and sends out the upper layer of recording paper 17a of recording paper 17 in the direction of one sheet. At this time, a pressing force Q is applied to the recording paper 17 via the separation rubber plate 5 to help separate the previous recording paper 17a. The outlet of the feeding means 3 is oriented in the D direction.

〔Example〕

FIG. 3 shows an embodiment of an automatic paper feeding mechanism according to the present invention, and is a schematic diagram specifically showing its feeding means, in which recording paper is handled as the recording medium.

As mentioned above, two sets of feeding means 2.3 are provided for - number of paper feed rollers 1. The recording paper 16 stacked on the tray 14 is fed out in the direction C by the friction between the recording paper 16a in the lowest layer and the paper feed roller 1 which rotates normally, and the recording paper 16 is fed out in the C direction by the friction force between the recording paper 16a which is the lowest layer and the paper feeding roller 1 which rotates normally. The paper is pressed against the paper feed roller 1 via the rubber separation plate 4 . Since the frictional force between the separating rubber plate 4 and the fed-out recording paper 16a is greater than the frictional force between the recording sheets 16, the fed-out recording paper 16a is separated from other recording papers 16, and multiple feeding is performed. is prevented. The pressing force applied to the separation rubber plate 4 is applied by a spring 10 having a base point on a part of the presser fitting 6. The presser metal fitting 6 is rotatably supported by the shaft 4p, and is biased by a spring 12 in a direction to press the separation rubber plate 4.

However, when the feeding means 2 is stopped, the paper feed roller 1 is reversed, and the feeding means 3 is activated.

It was connected to the end of the presser metal fitting 6 on the opposite side to the shaft 4p.
'The solenoid valve 8 is energized, the presser metal fitting 6 is pulled up in the E direction, and the pressing force applied to the separating rubber plate 4 is relieved. This is to prevent the separation rubber plate 6 from getting caught up in the paper feed roller 1 which rotates in reverse.

1. Separate rubber plate for handling the recording sheets 17 accumulated on the tray 15; 5. Holder metal fitting 7. Spring 11.13. The feeding means 3 constituted by an electromagnetic valve 9 operates in conjunction with the rotation of the paper feed roller 1 in the reverse direction B, and conveys the recording paper 17 in the D direction. Its operating mechanism is similar to the feeding means 2 described above.

Recording paper 16a discharged in direction C or direction D,
17a are guided by separation guides 18 and fed into respective conveyor paths 19,20 (shown in dotted lines).

An electromagnetic chuck may be used instead of the electromagnetic valves 8 and 9 used to release the pressing forces P and Q of the separation rubber plates 4 and 5.

Other means using one-way, clutch, etc. can also be applied.

The two conveyance paths 19 and 20 can be used in various ways depending on the purpose. Examples of its application will be shown below.

FIG. 4 shows an example of application to a recording/reading device using thermal recording, and the automatic paper feeding mechanism is the same as the embodiment shown in FIG. 3, and is omitted in the illustration.

In the figure, 41 is a document, 42 is a thermal recording paper, 43 is a contact image sensor, 44 is a reading roller, 45 is a thermal head, 44 is a platen roller, 47, 48 is a stacker, and 49 is a conveyance roller.

The document 41 is drawn in by the paper feed roller 1 , is conveyed by the reading roller 44 while being read by the contact image sensor 43 , and is stored in the stamper 47 .

Similarly, the thermal recording paper 42 is pulled out by the paper feed roller 1, printed by the thermal head 45, sent by the feed roller 49, conveyed by the platen roller 46,
It is discharged onto the stunker 48.

As is clear from FIG. 4, the recording/reading apparatus is an example in which recording media are conveyed separately to two processing lines using an automatic paper feeding mechanism according to the present invention. On the other hand, it can also be applied to other types of printing and reading systems.

FIG. 5 shows an example of application to a reading device that can feed two types of paper with different sizes and has a single reading stage, and is an example in which two types of recording media are conveyed to the same processing line. The automatic paper feeding mechanism is the embodiment shown in Fig. 3 (not shown in the figure).
It is similar to

In the figure, 51 is an A4 size original, 52 is a B4 size original, 53 is a fluorescent lamp, 54 is a transport roller, 55
．． 57 is a lens, 56.58 is a CCD (charge transfer device) image sensor, and 59 is a stamper.

An A4-sized document 51 is pulled out by the paper feed roller 1 and conveyed to the conveyance path, and when it reaches the reading stage R, the surface of the document is scanned by the CCD image sensor 56 through the lens 55 under the illumination of the fluorescent lamp 53. Records are read. Manuscript 5
1 is further discharged onto a stacker 59 by a conveyance roller 54. The B4 size original 52 is similarly sent to the reading stage R, and the recording on the original surface is read by the CCD image sensor 58 via another lens 57.

FIG. 6 shows the automatic paper feeding mechanism (2) shown in FIG. 3 based on the present invention.
FIG. 2 is a schematic diagram illustrating an application example in which a recording device (not shown) is applied to a recording device.

In the figure, 61 is an A4 size original, 62 is a B4 size original, 63 is a platen roller, 64 is a wire dot recording head, 65 is an ink ribbon, and 66 is a transport roller.

67 indicates a stacker.

An A4 size document 61 is pulled out by a paper feed roller 1 and conveyed to a conveyance path, printed by a wire dot recording head 64, conveyed by a platen roller 63 and a conveyance roller 66, and discharged onto a stacker 67.

Similarly, a B4 size document 62 is also printed by the wire dot recording head 64, and is printed by the platen roller 63 and the transport roller 6.
6 and discharged onto a stunker 67.

Recording paper is sorted by size.

The automatic paper feeding mechanism shown in FIG. 6 can be applied even if the paper feed mechanism is differentiated based on the material or recording method.

[Effects of the present invention] According to the automatic paper feed mechanism based on the present invention, the paper feed roller is selectively driven in the forward rotation direction and the reverse rotation direction, and the separation material is selectively pressed against the paper feed roller. , two types of recording media can be selectively fed to a recording device or a reading device. As a result, the mechanical structure of the device is simplified, and space is available, which has the advantage of making the device smaller and cheaper.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of an automatic paper feeding mechanism based on the present invention. FIG. 2 is an explanatory diagram of the operation of the automatic paper feeding mechanism based on the present invention. FIG. 3 is a schematic diagram specifically showing the automatic paper feeding means of an embodiment of the automatic paper feeding mechanism based on the present invention. FIG. 4 is a schematic diagram showing an application example in which the automatic paper feeding mechanism based on the present invention is applied to a recording/reading device using thermal recording. Figure 5 shows a reading device in which two types of recording paper of different sizes are sent to the same reading stage. FIG. 1 is a schematic diagram showing an application example to which the automatic paper feeding mechanism of the present invention is applied. FIG. 6 is a schematic diagram showing an example in which the automatic paper feeding mechanism of FIG. 3 based on the present invention is applied to a recording device. FIG. 7 is a schematic diagram showing a conventional example of an automatic paper feeding mechanism. In fig. 1 is a driven roller, 2 and 3 are feeding means. 4.5 is the separation rubber plate, and 6.7 is the holding metal fitting. 8.9 is a solenoid valve, 10, 11, 12, 13
Spring. 14.15 is the tray, 16.17 is the recording medium Figure 1 Jitter! 814/14 lower 1nG ■ Figure 1n +zffis * t (4 units 1% Glbrd! t1st place, t
lh li'f- the 4th wi

Claims (1)

[Claims] A recording medium (16, 17) equipped with a plurality of paper feed units (2, 3)
), the paper feeding mechanism includes a paper feeding roller (1) that is controlled in forward and reverse directions, and a feeding end of the recording medium (16, 17) provided at opposing positions on the outer periphery of the paper feeding roller (1). and a medium holder (1) having recording medium separating members (4, 5).
4, 15), and means (8, 9) for selectively pressing the recording medium separation member (4, 5) against the paper feed roller (1) in response to forward and reverse rotation of the paper feed roller (1), respectively. ) Automatic paper feeding mechanism.