KR0140107Y1 - Apparatus for preventing continuous feeding of sheets - Google Patents

Abstract

In the office equipment having the sheet feeding function of the present invention, since the paper feed tray is conventionally inclined at a predetermined inclination angle, after the first print medium of a plurality of print media is fed, the next print medium is fed to a certain point of the feed roller. When the print medium is reached, there is a problem in that the feeding of the print medium is performed by continuity rather than sheet feeding, so that the paper feeding tray is detached to prevent continuous feeding of the print medium. Because of the high coefficient of friction and the printing medium to be fed is to be fed continuously.

That is, even if a certain inclination angle of the feed tray acts as a negative and the feeding operation of the print media is not performed, firstly, when a separate pickup roller acts as a single roller to simultaneously pick up or feed the print media, Second, as in the case of separating the print media by the friction pad method, the paper feed tray has a certain inclination angle in the above two cases, and the feeding of the print media has more continuity. There was a problem.

Therefore, the present invention provides an arm stopper to the office equipment that feeds the print media to solve the above problems, while preventing the continuous feeding of the fed print media so that the sheet can be fed separately. An apparatus for preventing continuous feeding of a print medium that produces an effect of aligning the front end of a print medium to be fed and increases the contact force between components of the office device to provide a user with convenience in using the office device.

Description

Device for preventing continuous feeding of print media

1 is a side sectional view showing an initial feeding state of a printing medium in a conventional printing medium feeding device.

2 is a side cross-sectional view showing a state after feeding of a print medium in a conventional print medium feeder.

Figure 3 is a partial side cross-sectional view showing a feeding state of the print medium in the conventional print media feeder.

4 is a view showing a feeding direction of a printing medium in a conventional printing medium feeding device.

5 is a view showing a problem in feeding a print medium in a conventional print medium feeding device.

Figure 6 is a perspective view showing the structure of the continuous paper feed prevention device of the present invention print media.

7 is a partial side cross-sectional view showing the initial feeding state of the print medium in the continuous feed prevention device of the present invention.

Figure 8 is a partial side cross-sectional view showing a state after the feeding of the print medium in the continuous feeding prevention device of the print media of the present invention.

9 is a partial side cross-sectional view showing the operating state of the arm stopper according to the feeding state of the printing medium in the continuous feeding prevention device of the present invention.

Figure 10a is a partial side cross-sectional view showing the curl phenomenon generated in the print medium by the arm stopper in the continuous feeding prevention device of the present invention.

b is a partial plan view showing a curl phenomenon generated in the print medium by the arm stopper in the continuous feeding prevention device of the present invention.

* Explanation of symbols for main parts of the drawings

11: feeding roller 12: friction pad

13: arm stopper 13a: hinge

13b: elastic body 14: camshaft

14a: Boss 14b: Pad Cam

14c: stopper cam 15: cam sensor

The present invention, in the office equipment having a sheet feed function, in particular the arm stopper (Arm Stopper) is configured in the office equipment that feeds the print media, while preventing continuous feeding of the printed media being fed between each component of the office equipment The present invention relates to a continuous feeding prevention device for a print medium, which is intended to provide convenience in use by increasing contact force.

In general, in an office apparatus having a sheet feeding function to feed a print medium, the print medium (for example, paper) is often formed to be fed with a certain angle of inclination.

That is, for example, the printing media fed by Lexmark or Canon's office equipment (e.g., OEMs from Samsung and Shindorico and being sold in Korea or BJC4000 and BJC600 models, etc.) always have a great influence in the direction of gravity. It is shaped to receive.

Therefore, when the printing medium is fed, the printing medium is taken with the attitude that the printing medium is poured on the basis of the inside of the feeding roller which feeds the printing medium. Accordingly, the office equipment according to the feeding in the paper separating method of the printing medium. There is a constant friction between the components of the.

The constant coefficient of friction due to the generated constant frictional force is designed to be made in a predetermined pattern according to the feeding method of the printing medium to be fed, so that the sheet feeding of the printed medium to be fed is adopted in such a manner as to smoothly feed the sheet. It was.

Therefore, the configuration and operation of a conventional print media paper feeder for explaining the printing media paper feeding method in the office apparatus having the general sheet feed function described above in more detail will be described with reference to FIGS. 1 to 4. As follows.

First, a paper feed tray (Tray) 1 for guiding the transport of a print medium (for example, paper), a first cam (CAM) 2 which rotates to drive the paper feed tray 1, and the paper feed. Separating a sheet of printing media being fed while generating a constant friction force in contact with the rotary feeding paper feed roller (3) and the rotationally driven paper feeding roller (3) to feed the print media conveyed by the tray (1) The friction pad 4 and the second cam 5 which rotates to drive the friction pad 4, wherein reference numeral 6 denotes a discharge roller.

The operation of the conventional print media paper feeder configured as described above will be described below.

First, as shown in FIG. 1 to copy or print information desired by a user, a plurality of print media are placed on the paper feed tray 1 having a predetermined tilt angle θ, and then power is applied to the When the office equipment is operated, a plurality of print media (for example, paper) seated on the paper feed tray 1 having the predetermined tilt angle θ rotates while traveling in the direction of gravity, as shown in FIG. The paper feed roller 3 is fed into the office equipment.

Then, a predetermined frictional force is generated between the respective components of the office equipment according to the printing medium to be fed, as shown in Figure 3, 1. Friction between the printing medium and the feeding roller 3 to be fed Coefficient (μ1), 2. friction coefficient (μ2) between the printed medium to be fed and the next printed medium to be fed, 3. friction coefficient (μ1) between the printed medium to be fed and the friction pad (4) In addition, the generated constant frictional force is designed to establish a relationship of a predetermined pattern (μ1μ3 »μ2) so as to smoothly feed the printed medium to be fed.

Therefore, the friction pad 4 is driven in a rotational direction of the second cam 5 so as to separate the plurality of printed media fed by the sheet as shown in FIG. The separation operation is performed, and the paper feeding tray 1 also performs the separation operation in the predetermined direction Q at the same time according to the rotation operation of the first cam 2 according to the separation operation of the friction pad 4.

That is, as shown in FIG. 2, the paper feeding tray 1 and the friction pad 4 are fed by the paper feeding roller 3 while being separated in a predetermined direction P. The plurality of print media is separated into sheets and the schedule information desired by the user is copied or printed, and the copied or printed print media is discharged to the outside according to the rotational driving of the discharge roller 6 in a single sheet.

However, in the conventional printing medium feeding apparatus, since the paper feed tray 1 is inclined at a predetermined inclination angle θ, as shown in FIG. 5, after the first printing medium of the plurality of printing media is fed, Since the print medium reaches a certain point A of the feed roller 3, the print medium is fed by continuity rather than sheet feeding.

In addition, although the paper feeding tray 1 performs the detaching operation to prevent continuous feeding of the print media, the print media generates a high friction coefficient (μ = 1.2 or more) with the feed roller 3. The fed print media is fed continuously.

That is, even if a predetermined inclination angle θ of the paper tray 1 acts as a minus (−), the feeding operation of the print media is not performed. First, a separate pickup roller acts as a single roller to pick up the print media. Alternatively, when the feeding operation is performed at the same time, secondly, as in the case of separating the print media by the method of the friction pad 4, the feeding tray 1 has a predetermined inclination angle θ in the above two cases. In this case, there is a problem in that the feeding of the print media more clearly has a continuity, which makes the use of office equipment inconvenient.

Therefore, the present invention provides an arm stopper to the office equipment that feeds the print media in order to solve such a problem, thereby preventing the continuous feeding of the fed print media so that the sheet can be fed separately. The purpose of the present invention is to create an effect of aligning the front end of the print media and to increase the contact force between the components of the office equipment to provide a user with convenience in using the office equipment.

The configuration and operation of the continuous feed prevention apparatus of the present invention for achieving the above object will be described with reference to FIGS. 6 to 10.

First, the sheet feeding roller 11 is rotated so as to feed a print medium (eg, paper) and the print medium being fed while generating a constant friction force in contact with the rotating roller feeding feeder 11. An arm stopper which is driven to prevent continuous feeding of the print media separated by the feeding roller 11 and the friction pad 12 while keeping the friction pad 12 and the printing medium in close contact with the feeding roller 11. A stopper 13, a cam shaft 14 which is rotatably driven to drive the arm stopper 13 and the friction pad 12 while the boss 14a is formed to protrude, and the protruding boss It is composed of a cam sensor 15 for controlling the predetermined position of the cam shaft 14 to rotate the motion by sensing the direction of the 14a).

The arm stopper 13 is fastened to a hinge 13a, which is a reference point when the stopper is driven, and an elastic body 13b that is elastically formed is integrally formed on the lower surface to smoothly drive the stopper. The cam shaft 14 includes a pad cam 14b protruding on one side to drive the friction pad 12, and an arm stopper 13 at a predetermined angle with the pad cam 14b. The stopper cam 14c which protrudes a lot in the other side so that it may drive is formed.

Reference numeral 16 is a feed gear, and 17 is a cam gear.

Referring to the operation of the continuous paper feed prevention device of the present invention configured as described above is as follows.

First, a plurality of print media are placed on a paper feed tray to copy or print information desired by a user. Then, when an office device for supplying the print media is operated by applying power, a plurality of prints placed on the paper feed tray are operated. The medium (for example, paper) is sequentially fed into the office equipment by the feeding roller 11 which is rotationally driven.

In this case, as shown in FIG. 6, when the plurality of print media are sequentially fed, the cam shaft 14 rotates, and the pad is formed to protrude on one side according to the rotation of the cam shaft 14. The cam 14b drives the friction pad 12.

In addition, the driven friction pad 12 is in contact with the paper feeding roller 11 for feeding a print medium, thereby generating a predetermined friction force between the paper feeding roller 11 and the turntable by the generated constant frictional force. A plurality of print media that is fed as it is to be fed separately.

In addition, the stopper cam 14a protruding on the other side of the cam shaft 14 while forming a predetermined angle (180 °) with the pad cam 14b simultaneously rotates in accordance with the rotational operation of the cam stopper 14 while the arm is rotated. The satopper 13 is driven.

Accordingly, the driven arm stopper 13 enters the inside of the main frame of the paper feed roller 11, as shown in FIG. 7, while the first print medium is fed by the paper feed roller 11, that is, The operation of falling in the direction of the arrow (R) does not interfere with the feeding operation of the print medium.

Here, the cam sensor 15 detects the traveling direction of the boss 14a protruding from the cam shaft 14 when the cam shaft 14 protrudes from the boss 14a. It is possible to accurately grasp the predetermined position of the cam shaft 14 that is rotating.

On the other hand, when the first printing medium is fed to the printing period of the office equipment by the friction pad 12, the friction pad 12 and the paper feed tray is to perform a separation operation to separate the sheet of the printing medium being fed, Simultaneously with the detachment operation of the friction pad 12 and the paper feed tray, the cam shaft 14 performs a rotation operation.

At this time, in the arm stopper 13 having the hinge 13a as a reference point according to the rotation operation of the cam shaft 14, the outer side of the main frame of the feed roller 11 according to the elastic action of the elastic body 13b integrated in the lower portion. The driving in the direction, ie, arrow direction (T).

Accordingly, as shown in FIGS. 8 and 9, when the arm stopper 13 is driven to ascend, the arm stopper 13 is a point at which the first print medium fed is separated. ) And a certain distance (for example, 3mm) while being in close contact with the surface of the first printing medium to be fed, it is possible to smoothly feed the first printing medium to be fed.

In addition, while the first print medium is smoothly fed, even if the second print medium reaches a certain point (N), as shown in FIG. 9, the second print medium is placed at the tip of the arm stopper 13. By being caught, it is possible to prevent the continuous feeding operation of the print medium.

In addition, as shown in (a) and (b) of FIG. 10, the second print medium caught by the tip of the arm stopper 13 may be curled.

Therefore, even if there is a crooked paper (for example, third), the print media that has been crooked (for example, the third) is immediately arranged by the curl phenomenon, and then the next paper (for example, the fourth). The print media from ~) achieve the correct leading alignment.

As described above, the present invention configures an arm stopper in an office device that feeds a print medium, thereby preventing continuous feeding of the print medium to be fed so that the sheet can be fed separately and fed. It produces an effect of aligning the tip, and also increases the contact force between each component of the office equipment to provide the user with convenience in using the office equipment.

Claims (5)

A friction pad (12) for separating a sheet of printed media while generating a predetermined friction force in contact with the rotationally driven feeding roller (11) so as to feed a print medium, and the rotating roller feeding roller (11); An arm stopper 13 and a boss 14a which are driven to prevent continuous feeding of the print medium separated by the feed roller 11 and the friction pad 12 while keeping the print medium in close contact with the feed roller 11; The cam shaft 14 which rotates to drive the arm stopper 13 and the friction pad 12 and the cam shaft 14 which detects the traveling direction of the protruding boss 14a and is formed to protrude. 14. A continuous feeding prevention device for a print medium, comprising: a cam sensor (15) for controlling a predetermined position of the plate; The stopper 13 is fastened to the arm stopper 13, which is a reference point when the stopper is driven, and an elastic body 13b that is elastically actuated to smoothly drive the stopper. Preventing continuous feeding of print media, characterized in that formed integrally. The cam shaft 14 includes a pad cam 14b protruding on one side to drive the friction pad 12, and an arm stopper 13 at an angle with the pad cam 14b. An apparatus for preventing continuous feeding of a print medium, wherein a plurality of stopper cams 14c protruding from the other side are formed to be driven. The apparatus of claim 1 or 2, wherein the characteristics of the arm stopper (13) are made of a nylon material. 3. An apparatus for preventing continuous feeding of a printing medium according to claim 2, wherein the elastic spring acting on the elastic body (13b) is constituted by a leaf spring.