KR100449737B1 - Paper guide structure of printing device which is good for jam recovery - Google Patents

Abstract

The paper guide structure of the disclosed printer includes: a first feed roller for entering the paper fed from the paper feeder into a transfer path in the printing machine; a second feed roller for taking over the paper fed by the first feed roller and relaying the paper to the next process; A guide member disposed between the first and second feed rollers along the conveying path to guide the paper, and installed on the printer body so as to be openable and close to one side of the sheet passing through the conveying path. It includes a door provided, the back of the second feed roller is formed with an empty space toward the door side, open the door and pull the leading edge of the paper passing through the second feed roller, the paper rides on the outer peripheral surface of the second feed roller Configured to exit. According to such a structure, the problem of paper tearing during the jam processing can be suppressed, so that the jam processing can be performed more quickly and conveniently.

Description

Paper guide structure of printing device which is good for jam recovery}

The present invention relates to a paper guide structure of a printing press that can facilitate paper jam processing.

For example, in a printing machine such as a printer or a copying machine, as illustrated in FIG. 1, the door 11 is provided to be opened and closed so that the user can look inside the main body 10 when necessary. Such a door 11 is also necessary for the internal maintenance of the printing press, but when a jam occurs in which the paper fed from the cassette 12 is caught in the middle of the transfer path during printing, the user can remove the jammed paper. It is also necessary to make it possible. That is, if a jam occurs while printing is in progress, the user opens the door 11, removes the paper jammed on the paper path, and resumes printing again.

On the other hand, the paper guide structure inside the main body 10 constituting the conveying path of the paper fed from the cassette 12 is configured as shown in Figs. The guide structure includes a guide plate 11a provided inside the door 11, a paper guide member 16 fixed to the main frame 10a, and a sheet of paper so that one surface of the paper S can pass therethrough. The main feed roller 14 and the auxiliary feed roller 15 rotatably installed on the frame 10a to transfer the bite S are provided with backup rollers 14a and 15a corresponding to the feed rollers. Therefore, the paper S drawn out from the cassette 12 passes through the guide plate 11a while being guided by the guide member 16, and the main feed roller 14, the auxiliary feed roller 15, and each backup roller ( It passes between 14a) and 15a, and is conveyed toward the transfer roller 13.

By the way, if jam occurs on such a paper conveying path, it is necessary to open the door 11 and pull out the jammed paper S, wherein the paper leading end is caught only between the main feed roller 14 and the backup roller 14a. If it is in the state, it can be pulled out toward the cassette 12 again, but as shown in FIG. Attention should be paid to jam processing because it cannot be returned to the (12) side. In this case, the direction in which the paper S can be pulled out may be either the arrow A direction of FIG. 2B or the arrow B or C direction of FIG. 2A. Among them, the A direction is very likely to tear the paper. That is, since the main feed roller 14, the auxiliary feed roller 15, and the respective backup rollers 14a and 15a bit the side end of the paper S, the rollers 14 (in this state) ( When the paper S is pulled in the A direction, which is the axial direction of the 14a), 15 and 15a, the paper S is likely to be torn because the sheet S is clamped and pulled. On the contrary, when the paper S is pulled out in the B direction, the rollers 14, 14a, 15, and 15a may rotate as the paper S is pulled out so that the paper S may be torn. Although the possibility is small, it is not easy for a user to access the paper S with his or her hand usually because other units are mounted above it. Accordingly, since pulling out the paper in the direction of arrow C, i.e., the door 11 is open, the paper can be pulled out while rotating the rollers 14, 14a, 15 and 15a while avoiding interference with other units. It is the most acceptable jam processing direction. By the way, in the conventional structure as described above, there is a problem that there is a risk that the paper is broken even when taken out in the C direction. That is, since the guide member 16 is provided in the frame 10a to the upper side of the auxiliary feed roller 15, the paper S is removed as shown in the portion D of FIGS. 2A and 2B when the paper is taken out in the C direction. Folded by the end of the guide member 16 is in contact with the friction comes out. In this case, the paper S is scratched by the end of the guide member 16, and when the friction is severe, it is likely to be torn. This will not only cause the paper to be broken, but it will also be cumbersome for jam processing such as having to remove the torn pieces of paper again.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a paper guide structure of a printing machine which can ensure a stable jam processing by suppressing a paper tearing process.

1 is a view showing a printing machine employing a conventional paper guide structure,

2A and 2B show the paper guide structure shown in FIG. 1;

3 is a view showing a printing machine employing a paper guide structure according to the present invention,

4A and 4B show the paper guide structure shown in FIG. 3;

FIG. 5 is a view showing main parts of the paper guide structure shown in FIG. 3; FIG.

<Description of Symbols for Major Parts of Drawings>

100 ... printer 110 ... door

111 ... guide plate 112 ... auxiliary guide part

120 Cassette 130 Transfer Roller

140,150 ... 1st, 2nd feed roller 141,151 ... 1st, 2nd backup roller

Guide member S ... Paper

The paper guide structure of the printing machine according to the present invention for achieving the above object comprises a first feed roller for entering the paper supplied from the paper feed portion into the transfer path in the printing machine; A second feed roller which takes over the paper conveyed by the first feed roller and relays it to the next process; A guide member disposed between the first and second feed rollers along the transfer path to guide the paper; It is installed to open and close to the printer main body, the door is provided with a guide plate to pass while touching the one side of the paper passing through the transfer path inside, the rear of the second feed roller, the bin toward the door side A space is formed, and when the door is opened and the front end of the paper passing through the second feed roller is pulled out, the paper is driven out of the outer circumferential surface of the second feed roller.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 shows a printing machine employing a paper guide structure according to the present invention.

Referring to the drawings, first, the guide plate 111 is installed on the inner surface of the door 110 installed in the printer main body 100 so as to be open and close so that one surface of the paper passes. Therefore, when the door 110 is closed, the guide plate 111 is positioned on one side of the paper conveying path to support one surface of the conveyed paper. In addition, the first feed roller 140 and the first backup roller for feeding the side end portion of the paper supplied from the cassette 120, which is a paper feeding part, to the transfer roller 130 side by biting the frame 101 on the main body 100 side. 141, the second feed roller 150, and the second backup roller 151 are provided along the transfer path. That is, the paper from the cassette 120 is bitten between the first feed roller 140 and the first backup roller 141 to enter the transfer path, and then the second feed roller 150 and the second backup roller ( It is relayed by the 151 and is transferred to the transfer roller 130 side. Reference numeral 160 denotes a guide member provided in the frame 101 to guide the paper not to deviate from the transfer path. The guide member 160 is provided between the first and second feed rollers 140 and 150, between the first and second backup rollers 141 and 151, and behind the second backup roller 151. It is not disposed behind the two feed rollers 150. This is to form an empty space at a portion of the second feed roller 150, which is toward the door 110 side. To this end, the bracket 152 fixed to the frame 101 to support the rotation axis of the second feed roller 150 is also made in the shape of a "V", so as to face the door 110 behind the second feed roller 150. As a part, the bracket 152 does not protrude. This is because when the door 110 is opened and the paper is pulled out for the jam processing, the paper may smoothly escape on the outer circumferential surface of the second feed roller 150. As described above, instead of the guide member at the rear of the second feed roller 150 of the frame 101, the auxiliary guide part 112 serving as the guide member on the side of the door 110 is shown in FIG. 5. ) Is provided. Therefore, in the state in which the door 110 is closed, the auxiliary guide part 112 serves to guide the paper together with the guide member 160 opposed thereto. Of course, since the auxiliary guide part 112 is provided in the door 110, after opening the door 110, there is no problem in removing the paper from the transfer path.

In the above configuration, when the printing operation is performed, the paper supplied from the cassette 120 is transferred along the transfer path by the first and second feed rollers 140 and 150 to pass through the transfer roller 130. At this time, the image is transferred to one side and then exits the printing press.

By the way, if the jam occurs during the printing process, the paper should be removed. If the jam occurs in the state where the leading edge of the paper has just been bitten between the first feed roller 140 and the first backup roller 141, The paper is pulled back from the cassette 120. However, as shown in FIGS. 4A and 4B, the front end of the paper S has already passed between the second feed roller 150 and the second backup roller 151, and the first feed roller 140 exits the rear end cassette 120. ) And the first backup roller 141, it is impossible to back toward the cassette 120, so the door 110 must be opened and the paper S should be removed from the open side. Accordingly, in this state, when holding the front end of the paper S and pulling the paper S toward the open side of the door 110, the paper S forms the outer circumferential surface of the second feed roller 150 as shown in FIGS. 4A and 4B. As you wrap around, you come out. That is, since the space in the side direction of the door 110 behind the second feed roller 150 is an empty space where no member such as the guide member 160 can interfere with the paper S, the paper S is completely empty. Since only the outer circumferential surface of the second feed roller 150 is in contact with the second feed roller 150, the paper S may be smoothly taken out while being rotated out of the second feed roller 150.

Therefore, according to the paper guide structure of the present invention, even when the paper is processing jams between the first and second feed rollers 140 and 150, only the door 110 is opened and the paper S is pulled out. In this case, since the paper S is pulled out while rotating the second feed roller 150 without being scratched elsewhere, the paper S is hardly subjected to the frictional resistance, and thus the paper S is not torn. As a result, the time for processing the jam is shortened, and thus a quick recovery operation can be performed.

As described above, according to the paper guide structure of the printer according to the present invention, the problem of the paper tearing during the jam processing can be suppressed, so that the jam processing can be performed more quickly and conveniently.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.

Claims (18)

A first feed roller for entering the paper supplied from the paper feeder into a conveying path in the printer; A second feed roller which takes over the paper conveyed by the first feed roller and relays it to the next process; A guide member disposed between the first and second feed rollers along the transfer path to guide the paper; It is installed so as to open and close to the printer body, the door provided with a guide plate to pass while touching one surface of the paper passing through the transfer path inside the; The guide member is removed behind the second feed roller so that an empty space is formed toward the door side when the door is opened. When the door is opened and the front end of the paper passing through the second feed roller is pulled out, the paper is removed. The paper guide structure of the printing machine, characterized in that to exit through the outer peripheral surface of the second feed roller. The method of claim 1, And a first and second backup rollers for contacting and rotating the first and second feed rollers, respectively, and feeding and feeding the papers between the first and second feed rollers. The method of claim 1, It is further provided with a bracket fixed to the frame on the conveying path to support the rotation axis of the second feed roller, the bracket is coupled to the frame through other parts except for the space toward the door side behind the second feed roller Paper guide structure of the printing press, characterized in that the. The method of claim 1, The door is a paper guide structure of the printing press characterized in that the auxiliary guide portion which is located in the empty space for guiding the transport of the paper further provided. The method of claim 3, The bracket is a paper guide structure of the printing machine, characterized in that the V-shape. A first roller for conveying paper; A first guide for guiding paper on the first side of the first roller; A second guide for selectively guiding paper on the second side of the first roller; And A door supporting the second guide and selectively opened and closed; And the second guide is spaced apart from the paper when the door is opened. The method of claim 6, A second roller on a first side of the first roller; And The apparatus further comprises a body surrounding the first and second rollers and the first and second guides. The method of claim 7, wherein And the second guide does not guide the paper when the door is opened. The method of claim 8, And third and fourth rollers contacting and rotating the first and second rollers, respectively, and conveying paper therebetween. The method of claim 9, And the paper can be removed without tearing when jammed between the first and second rollers. The method of claim 6, And the second side is closer to the door than to the first side. The method of claim 11, Part of the second guide is on the first side of the first roller. Brackets; A first roller for conveying paper; A second roller installed on the bracket to receive paper from the first roller; A first guide guiding the first and second sides of the paper between the first and second rollers and guiding only the first side of the paper after the paper passes through the second roller; And a second guide for selectively guiding the second side of the paper after the paper passes through the second roller. The method of claim 13, The device is characterized in that it further comprises a door in which the second guide is installed and installed to open and close. The method of claim 13, The second guide is not installed on the bracket. The method of claim 14, The bracket has a V shape, A first portion extending in a conveying direction of paper before passing through the second roller; And And a second portion extending in a conveying direction of paper after passing the second roller while the door is opened. A paper feeding unit for feeding paper; Transport path; A first feed roller for moving the conveyed paper along the conveying path; A second feed roller which receives the paper conveyed by the first feed roller and conveys the paper along the transport path; A guide member for guiding paper along the transfer path between the first and second feed rollers; A backup roller which contacts and rotates the second feed roller and passes paper therebetween; main body; And A door installed to be opened and closed to the main body, And a sheet of paper passing through the backup roller while the door is open in contact with only an outer circumferential surface of the second feed roller. A paper feeding unit for feeding paper; Transport path; A first feed roller for moving the conveyed paper along the conveying path; A second feed roller which receives the paper conveyed by the first feed roller and conveys the paper along the transport path; A guide member for guiding paper along the transfer path between the first and second feed rollers; A backup roller which contacts and rotates the second feed roller and passes paper therebetween; main body; And A door installed to be opened and closed to the main body, And a sheet of paper passing through the backup roller while the door is opened, one surface of which is in contact with the arc of the second feed roller.