KR200160867Y1 - Device for preventing multiple sheet feed of feed unit in an image forming apparatus - Google Patents

Device for preventing multiple sheet feed of feed unit in an image forming apparatus Download PDF

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Publication number
KR200160867Y1
KR200160867Y1 KR2019970035273U KR19970035273U KR200160867Y1 KR 200160867 Y1 KR200160867 Y1 KR 200160867Y1 KR 2019970035273 U KR2019970035273 U KR 2019970035273U KR 19970035273 U KR19970035273 U KR 19970035273U KR 200160867 Y1 KR200160867 Y1 KR 200160867Y1
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South Korea
Prior art keywords
paper
finger
image forming
forming apparatus
curl
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KR2019970035273U
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Korean (ko)
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KR19990022971U (en
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장흥규
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윤종용
삼성전자주식회사
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Priority to KR2019970035273U priority Critical patent/KR200160867Y1/en
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Publication of KR200160867Y1 publication Critical patent/KR200160867Y1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/006Means for preventing paper jams or for facilitating their removal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02Rollers
    • B41J13/025Special roller holding or lifting means, e.g. for temporarily raising one roller of a pair of nipping rollers for inserting printing material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section

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  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

본 고안은 화상형성장치의 급지부에 관한 것으로, 더욱 상세하게는 용지의 강성 및 두께 편차에 의한 용지의 자동분리특성을 조절하기 위한 것으로써, 핑거(Finger)와 픽업로울러사이에서 이루어지는 용지의 컬(Curl)량을 탄력적으로 가감조절하는 얇은 탄성체의 필름인 가이드누름판을 핑거의 상단에 위치하여 구성함으로써 용지가 얇아 휨이 많이 발생하는 용지의 컬부분을 상부에서 가압하여 용지가 분리되어 낱장으로 공급하는 것으로, 가이드누름판은 용지의 자동분리를 위한 컬현상에 탄력적으로 용지에 영향을 줌으로써, 용지의 중송이 방지되어 화상형성장치의 자동급지의 신뢰성을 높이고 인쇄의 품질을 향상시킬수가 있는 것이다.The present invention relates to a paper feeder of an image forming apparatus, and more particularly, to adjust an automatic separation property of a paper due to the stiffness and thickness variation of the paper, and to obtain a curl of a paper formed between a finger and a pickup roller. The guide pressing plate, which is a thin elastic film that elastically adjusts the amount of curl, is placed on the top of the finger to press the curl part of the paper, which is thin and causes a lot of warpage, from the top to separate and feed the sheet. In this way, the guide press plate is to affect the paper elastically in the curl phenomenon for the automatic separation of the paper, it is possible to prevent the feeding of the paper to increase the reliability of the automatic feeding of the image forming apparatus and improve the printing quality.

Description

화상형성장치에서 급지부의 중송방지장치Feeding prevention device of paper feeding unit in image forming apparatus

본 고안은 화상형성장치의 급지부에 관한 것으로, 더욱 상세하게는 용지의 강성 및 두께 편차에 의한 용지의 자동분리특성을 조절하는 장치를 구성하는 것을 특징으로 하는 화상형성장치에서 급지부의 중송방지장치이다.The present invention relates to a paper feeder of an image forming apparatus, and more particularly, to a feed prevention unit of a paper feeder in an image forming apparatus, characterized in that a device for adjusting an automatic separation characteristic of a paper due to a stiffness and a thickness variation of the paper is configured. .

일반적으로 용지를 급지하는 급지부를 갖는 화상형성장치는 자동급지에서 낱장으로 분리하여 용지를 공급하기 위하여 핑거(Finger)를 구성하여 용지를 분리하는 방식을 이용한다.In general, an image forming apparatus having a paper feeder for feeding paper utilizes a method of separating paper by forming a finger to separate paper into sheets in automatic feeding and to feed paper.

이러한 화상형성장치는 픽업캠이 녹업플레이트를 누르고 있는 대기상태에서 사용자에 의해 용지가 적재되고 인쇄명령에 따라 급지장치부의 급지프레임에 부가된 녹업스프링의 탄력으로 자동급지상태로 전환되어 픽업로울러가 녹업플레이트에 적재된 용지를 픽업하면 핑거는 자동으로 한 장씩 분리하여 급지이송을 한다.The image forming apparatus is loaded with paper by the user while the pickup cam is pressing the knock-up plate and is switched to the automatic feeding state by the elasticity of the knock-up spring added to the feeding frame of the paper feeding unit according to the printing command. When picking up the paper loaded on the plate, the fingers are separated and fed one by one automatically.

도 1의 (가)도와 (나)도는 종래의 급지부(10)를 도시한것으로써, 핑거(11)에 걸려 장착된 용지(P)가 캠축(13)이 회전되면서 픽업로울러(12)에 의하여 용지가 픽업되는 것을 도시한 것으로 핑거와 픽업로울러의 간격에 의해 컬현상의 차이와 용지의 강성에 의한 차이를 나타낸 것이다.1 (a) and (b) show a conventional paper feeding part 10, the paper P caught on the finger 11 is rotated by the pickup roller 12 while the cam shaft 13 is rotated. The paper is picked up, and the difference between the curl phenomenon and the rigidity of the paper is shown by the distance between the finger and the pickup roller.

컬현상은 자동급지에서 용지(P)를 낱장으로 공급하기 위하여 핑거(11)에 걸려 용지가 휨을 발생하는 현상으로써 용지를 자동급지할때에 인쇄품질에 영향을 주는 인자이다.The curl phenomenon is a phenomenon that the paper is caught by the finger 11 in order to supply the sheet of paper P in the sheet feeding, which is a factor that affects the print quality when the sheet is automatically fed.

그러나 도 1의 (가)도 및 (나)도에서 도시된 바와 같이 핑거(11)가 자동으로 용지(P)를 한 장씩 급지하기 위한 핑거(11)는 용지의 두께의 편차나 용지의 강성의 차로 인하여 용지자체의 컬(Curl)현상의 크기는 용지에 따라 큰 차이가 발생되었다.However, as shown in (a) and (b) of FIG. 1, the finger 11 for automatically feeding the sheet of paper P by sheet has a variation in the thickness of the sheet or the rigidity of the sheet. Due to the difference, the curl phenomenon of the paper itself has a big difference depending on the paper.

그러므로써 용지(P)가 중송되는 현상 즉, 용지가 여러겹으로 겹쳐서 인쇄부(미도시)에 삽입되는 현상이 발생함으로써 급지부(10)를 구성할때에 핑거(11)와 픽업로울러(12)의 거리간격을 적당하게 조절하여 용지자체의 컬현상의 크기를 조절하였다.Therefore, a phenomenon in which the paper P is conveyed, that is, the paper is stacked in multiple layers and inserted into a printing unit (not shown) is generated, so that the finger 11 and the pickup roller 12 when the paper feeding unit 10 is configured. By adjusting the distance interval of the paper, the size of curl phenomenon of the paper itself was controlled.

미설명부호 14는 녹업플레이트, 15는 플레이트스프링을 도시한 것이다.Reference numeral 14 denotes a knock-up plate, and 15 denotes a plate spring.

그러나 상기와 같은 방법으로는 표본적인 용지(P)를 기준으로 핑거(11)와 픽업로울러(12)의 간격을 조절되어 있음으로 인하여 용지의 두께의 편차가 심하거나 용지의 강성의 차가 심하면 용지가 중송되어 인쇄부에 급지됨으로써 인쇄의 품질을 저하시키는 문제점이 발생하였다.However, according to the above method, since the distance between the finger 11 and the pickup roller 12 is adjusted based on the sample paper P, if the variation in the thickness of the paper is severe or the difference in the rigidity of the paper is severe, There was a problem in that the quality of printing is lowered by feeding the paper to the printing unit.

상기와 같은 문제점을 해소하고자 한 본 고안은 용지의 컬(curl)량을 탄력적으로 가감조정하는 얇은 탄성체의 박판으로 가이드누름판을 구성하여 핑거부의 상단에 위치하도록 구성하여 급지부에서 자동급지할때에 발생하는 중송불량을 해소하고자 하는데에 그 목적이 있는 것이다.The present invention to solve the above problems occurs when the automatic feeding from the feeder by configuring the guide pressing plate with a thin plate of elastic material to elastically adjust the amount of curl (curl) of the paper to be located on the top of the finger portion The purpose of this is to resolve the failure of the transport.

상기의 목적을 달성하기 위하여 본 고안은 핑거(Finger)와 픽업로울러사이에서 이루어지는 용지의 컬(Curl)량을 탄력적으로 가감조절하는 얇은 탄성체의 박판으로 가이드누름판을 핑거의 상단에 위치하여 구성함으로써 용지가 얇아 휨이 많이 발생하는 용지의 컬부분을 상부에서 가압하여 분리되는 용지를 낱장으로 공급하도록 한 것이다.In order to achieve the above object, the present invention is a thin plate of elastic material that elastically adjusts the amount of curl of a paper made between a finger and a pickup roller. It is to feed the separated paper by pressing the curl of the paper that is thin and the warpage occurs a lot from the top.

도 1의 (가)도 및 (나)도는 종래의 화상현성장치의 급지부에서 픽업로울러와 핑거 의 위치관계를 도시한 측단면도이고,1 (a) and (b) are side cross-sectional views showing the positional relationship between the pickup roller and the finger in the paper feeding portion of the conventional image forming apparatus.

도 2는 본 고안이 실시된 상태의 측단면도이며,Figure 2 is a side cross-sectional view of the state in which the present invention is carried out,

도 3은 본 고안에서 용지를 픽업하는 작동상태를 도시한 측단면도이고,Figure 3 is a side cross-sectional view showing an operating state of picking up paper in the present invention,

도 4는 본 고안에서 다른 용지를 픽업하는 작동상태를 도시한 측단면도이다.Figure 4 is a side cross-sectional view showing an operating state of picking up another paper in the present invention.

*도면의 주요부분에 대한 부호 설명** Description of Signs of Main Parts

100 : 급지부 110 : 핑거100: paper feeding unit 110: finger

120 : 픽업로울러 130 : 캠축120: pickup roller 130: camshaft

140 : 녹업플레이트 160 : 픽업캠140: knock up plate 160: pickup cam

170 : 가이드누름판 180 : 메뉴얼장치부170: guide pressing plate 180: manual device

이하, 본 고안의 구성 및 작용을 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, the configuration and operation of the present invention with reference to the accompanying drawings as follows.

도 2은 본 고안이 실시된 잉크젯프린터의 급지부를 도시한 것이다.2 shows a paper feeding unit of the inkjet printer in which the present invention is implemented.

픽업캠(160)이 녹업플레이트(140)를 누르고 있는 대기상태에서 사용자에 의해 용지(P)가 적재되고 인쇄명령에 따라 급지부(100)의 급지프레임(190)에 부가된 녹업스프링(150)의 탄력으로 자동급지상태로 전환되어 픽업로울러(120)가 녹업플레이트(140)에 적재된 용지를 픽업하면 핑거(110)에 걸려 있는 용지는 컬이 발생하고 자동으로 한 장씩 분리하여 급지이송을 한다.In the standby state where the pickup cam 160 is pressing the knockup plate 140, the paper P is loaded by the user and the knockup spring 150 is added to the paper feeding frame 190 of the paper feeder 100 according to a printing command. When the pick-up roller 120 picks up the paper loaded on the knock-up plate 140 by being switched to the automatic feeding state with elasticity, the paper hanging on the finger 110 is curled, and the paper is automatically separated and fed one by one.

상기 급지부(100)의 매뉴얼장치부(180)에는 강성이 작아 휨이 많이 발생하는 용지(P)는 픽업로울러(120)가 여러장으로 겹쳐 픽업되면 용지의 컬이 발생하는 상부를 눌러주어 용지가 분리되도록 하는 가이드누름판(170)의 일측을 부착하여 구성한다.In the manual device unit 180 of the paper feeder 100, the paper P, which has a low rigidity and causes a large amount of warpage, is picked up by picking rollers 120 stacked in a plurality of sheets. It is configured by attaching one side of the guide pressing plate 170 to be separated.

상기 가이드누름판(170)의 타측은 핑거(110)의 상부에 위치하도록 구성하고 끝단은 위로 향하도록 구성한다.The other side of the guide pressing plate 170 is configured to be positioned above the finger 110 and the end is configured to face upward.

즉 탄성체의 박판으로 형성되는 가이드누름판(170)의 일측은 매뉴얼플레이트(180)에 고정되어 구성되고, 타측은 핑거(110)의 상부에 위치하도록 형성되며 그 끝단은 상부로 향하도록 형성된다.That is, one side of the guide pressing plate 170 formed of a thin plate of the elastic body is configured to be fixed to the manual plate 180, the other side is formed to be located above the finger 110 and the end is formed to face upward.

탄성체의 박판으로 구성되는 가이드누름판(170)이 매뉴얼플레이트(180)에 고정시키는 방법은 양면테이프 등의 접착수단을 이용하여 접착 구성한다.The guide pressing plate 170, which is composed of a thin plate of elastic material, is fixed to the manual plate 180 using adhesive means such as double-sided tape.

이상과 같은 구성으로 이루어지는 본 고안은 도 3에서와 같이 얇은 용지(P)가 픽업되는 경우를 나타낸 것으로, 픽업로울러(120)의 회전에 의하여 용지(P)가 픽업된다.The present invention having the above configuration shows a case where the thin paper P is picked up as shown in FIG. 3, and the paper P is picked up by the rotation of the pickup roller 120.

픽업로울러(120)에 의하여 픽업되는 용지(P)가 강성이 약하여 여러장 겹쳐 픽업된 용지에서 컬의 정도가 높은부분 즉, 컬현상부분을 가이드누름판(170)이 눌름으로써 여러장 겹쳐 있던 용지가 분리되도록 한 것이다.The paper P picked up by the pickup roller 120 has a weak rigidity, and thus, the paper presses the presser plate 170 on the curled portion of the picked-up paper. It was to be separated.

그러면 분리된 용지의 맨 위의 용지만을 픽업되어 프릭션로울러(미도시)와 피드로울러(미도시) 사이로 삽입이 이루어져 인쇄부(미도시)에 의하여 인쇄되는 것이다.Then, only the top sheet of the separated sheet is picked up and inserted between the friction roller (not shown) and the feed roller (not shown) to be printed by the printing unit (not shown).

미설명부호 130은 캠축을 도시한 것이고, 190은 플레이트를 도시한 것이다. 도 4는 픽업되는 용지(P)가 두꺼울 경우를 나타낸 것으로써, 용지가 두꺼울 경우에는 용지의 컬의 정도가 적당하여 얇은 탄성체의 박판으로 구성되는 가이드누름판(170)은 용지에 영향을 미치지못함으로 일정한 컬을 유지하여 용지의 낱장분리력을 향상시켜 인쇄품질을 높일수가 있는 것이다.Reference numeral 130 denotes a camshaft, and 190 denotes a plate. 4 shows a case where the paper P to be picked up is thick. When the paper is thick, the degree of curl of the paper is appropriate, so that the guide pressing plate 170 composed of a thin sheet of elastic material does not affect the paper. By maintaining a constant curl to improve the sheet separation force of the paper can improve the print quality.

즉, 픽업로울러(120)에 의하여 용지(P)가 픽업이 이루어지는 과정에서 핑거(110)에 걸려 컬이 발생하는 부분을 가이드누름판(170)을 구성하여 컬이 발생하는 부분을 제어가능하도록 구성하여 용지가 급지될때에 용지의 중송을 억재되도록 한 것이다.That is, the pickup roller 120 is configured to control the part where curl occurs by configuring the guide pressing plate 170 in the process where the paper P is picked up and caught by the finger 110 in the process of picking up. When paper is fed, it is designed to suppress the feeding of paper.

또한, 용지(P)를 수동으로 급지할때에 가이드누름판(170)은 용지를 피드로울러(미도시)와 프릭션로울러(미도시)사이로 삽입이 용이하도록 용지의 상부에 놓여 용지의 가이드역활을 하게 되는 것이다.In addition, when manually feeding the paper P, the guide pressing plate 170 is placed on the top of the paper to facilitate insertion of the paper between the feed roller (not shown) and the friction roller (not shown). Will be done.

이상의 같은 본 고안의 구성으로 인한 효과는 핑거의 상단에 위치한 가이드누름판은 용지의 자동분리를 위한 컬현상에 탄력적으로 용지에 영향을 줌으로써, 용지의 중송이 방지되어 화상형성장치의 자동급지의 신뢰성을 높이고 인쇄의 품질을 향상시킬수가 있는 것이다.The effect of the configuration of the present invention is that the guide pressure plate located on the upper end of the finger elastically affects the curl phenomenon for the automatic separation of the paper, thereby preventing the feeding of the paper to improve the reliability of automatic feeding of the image forming apparatus Increase the quality of the print.

Claims (2)

용지를 자동급지할때에 픽업로울러에 의하여 픽업되고 낱장으로 공급하기 위하여 핑거부에 걸려 컬현상이 발생되는 화상형성장치의 급지부에 있어서;A paper feeding unit of the image forming apparatus, wherein the paper pick-up is picked up by a pickup roller when the paper is automatically fed and caught by a finger to feed a sheet; 상기 급지부에는 핑거(Finger)와 픽업로울러사이에서 이루어지는 용지의 컬(Curl)량을 탄력적으로 가감조절하는 얇은 탄성체의 박판으로 구성되는 가이드누름판을 핑거의 상단에 위치하여 구성하고 일측은 매뉴얼프레이트에 고정되어 구성한 것을 특징으로 하는 화상형성장치에서 급지부의 중송방지장치.The paper feeding part comprises a guide pressing plate made of a thin plate of elastic material that elastically adjusts the amount of curl of the paper made between the finger and the pickup roller, positioned at the top of the finger, and one side is fixed to the manual plate. The feeding mechanism of the paper feeding unit in the image forming apparatus, characterized in that the configuration. 제 1항에 있어서;The method of claim 1; 상기 가이드누름판이 매뉴얼플레이트에 접착수단에 의하여 고정되는 것을 특징으로 하는 화상형성장치에서 급지부의 중송방지장치.And the guide pressing plate is fixed to the manual plate by an adhesive means.
KR2019970035273U 1997-12-02 1997-12-02 Device for preventing multiple sheet feed of feed unit in an image forming apparatus KR200160867Y1 (en)

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