KR19990040416U - Separator structure for preventing feeding in automatic paper feeder - Google Patents

Abstract

This design prevents the feeding of multiple sheets of paper by quickly separating the separator from the feed roller, which prevents the feeding of multiple sheets of paper in the automatic paper feeder used in office equipment such as printers. An automatic paper feeder that improves the reliability of an anti-feeding function to prevent the feeding, and is a separator structure for preventing an feeding, wherein the tip of the paper-loading device and the first pressing pad having the first pressing pad are pivotable around the hinge supported by the pad housing. A separator having a knock up plate and a second press pad which is in close contact with a predetermined pressure to prevent the sheet of paper stacked on the knock up plate from being fed, and a predetermined constant pressure by applying a lift force when feeding the knock up plate and the separator. Pressurized by the feed roller In the automatic paper feeder consisting of a lift lever for providing a rotation force, a lever arm for applying rotational force to the lift lever, and a crank shaft for supporting the lever arm to rotate, the separator is inclined diagonally with respect to the feed roller. The lower end is restrained by a hinge supported by the pad housing, while the upper end is installed to receive the pressing force of the lift lever when feeding, and when the pressing force of the lift lever is released, the upper end of the separator is immediately lowered by its own weight. It is to be quickly spaced apart from the feed roller, and the paper feed does not come in such a space, so that the feeding error is prevented in advance.

Description

Separator structure for preventing feeding in automatic paper feeder

The present invention relates to an automatic paper feeder used for office equipment such as a printer, and more particularly, a separator that prevents the feeding of multiple sheets of paper automatically. It relates to a separator structure for preventing feeding in an automatic paper feeder that is more precisely and is improved so that the feeding prevention function that prevents the feeding of multiple sheets by quickly falling from the feeding roller during the non-feeding process.

In general, office equipment such as a printer to load the paper in the cassette, the paper in the cassette is fed by the automatic paper feeder sheet by sheet to be printed by the printing apparatus.

Figure 1 shows the inside of such an inkjet printer, and in more detail, it shows a front-loading printer that feeds paper from the front of the printer and the printed paper is also discharged to the front.

As such a printer, as shown in Fig. 2, in order to feed paper, it has been invented to obtain a paper feed driving force by using the carriage 2 on which the ink cartridge 1 is mounted to reciprocate left and right.

Here, the carriage 2 reciprocates only in the printing stroke section during the printing process. However, when one sheet of paper is printed and the next sheet feed is required, the carriage 2 is further moved from the printing administration section to the feeding administration section.

When moving to the paper feeding section, the carriage 2 pushes the carriage lever 21 to the left direction, whereby the paper feeding power switching unit 10 is operated. That is, the paper feeding power switching unit 10 is the first bevel gear 22 rotated by the carriage lever 21 in the housing 24 and the first bevel gear 22 is engaged with the first bevel gear 22 at a right angle. Two bevel gears 23 are provided. The crankshaft 30 is directly connected to the second bevel gear 22.

Therefore, when the carriage lever 11 is rotated to the left by the carriage 2, the paper feed power switching unit 20 is interlocked with the first and second bevel gears 22 and 23 so that the linear movement of the carriage 2 is performed. As the crankshaft 30 is rotated as the rotary motion is switched.

In addition, by the rotational movement of the crankshaft 30, the paper feeder unit 40 is installed to be located in the lower rear side of the feed roller 5, the paper feeder unit 40 is respectively on both sides It is provided.

In FIG. 3, the paper feeding unit 40 is described in more detail. Here, the crankshaft 30 is a bar (bar) of a rectangular shape is usually used. This is to make it easy to fix the parts to be fixed to the crankshaft 40 and to move the paper feeder unit 40 on any one of the two sets of paper feeder units 40 in the left and right directions.

In addition, the paper feeding unit 40 includes a lever arm 50 and a lift lever 60. The lift lever 60 is coupled to the hinge 61 is inserted into the hinge boss 52 of the lever arm 50, the spring engaging portion 53 at the rear end of the lever arm 50 and the lift lever 60. At 63, the pulling elastic member 70 is installed to be connected.

The front end of the lift lever 60 includes a first pressing lever part 62, and the first pressing lever part 62 of the knock-up plate 43 connected to the pad housing 41 and the hinge shaft 42. The bottom of the first pressing pad 44 is lifted up.

In addition, the lift lever 60 is provided with a second pressing portion 64 in the middle portion, and the lifting member 80 is installed so that the lifting and lowering along the guide 41f in the pad housing 41. It is. An elastic member 81 is installed on the elevating member 80, and the elastic member 81 is configured to press the free end 93 of the separator 90 connected by the pad housing 41 and the hinge 91. The second pressing pad 92 is disposed on the upper surface of the separator 90.

In this automatic paper feeder, when the paper p is to be fed, the crankshaft 30 is rotated clockwise as shown in FIG. Accordingly, as the lift lever 60 is rotated by the rotation of the lever arm 50, the first pressing lever portion 62 thereof is pushed up by pushing the knock-up plate 43, whereby the paper loaded thereon (p) becomes close to the paper feed roller (5).

At this time, the second pressing portion 64 of the lift lever 60 pushes up and down the lifting member 80, and accordingly, the elastic member 81 presses the free end 93 of the separator 90 to press the second end portion. The pressure pad 92 is in close contact with the paper feed roller 3.

Therefore, since a predetermined pressure of the second pressing pad 92 in the separator 90 is applied to the paper feed roller 5, the paper p is prevented from passing by several sheets.

Next, when the paper p passes through the guide roller 6 and reaches the friction roller 8, the carriage 2, which has been pushing the carriage lever 21, is moved to the printing administration area, whereby the crankshaft 30 It will be in a state of reverse rotation (counterclockwise rotation).

As a result, the lift lever 60 is reversely rotated because the first pressing lever part 62 is lowered by the weight of the knock-up plate 43 including the paper p, and at the same time, the lift lever 60 is rotated to its second pressing part 64. The elevating member 80 in a state of being pressed by the state becomes a state in which it can be lowered downward, whereby the separator 90 that has been pressed by the elastic member 81 has a free end 93 around the hinge 91. Is in a state of going down.

However, in such a separator structure, the hinge 91 is not in the direction of the first pressure pad 44 into which the paper p is drawn, but is discharged to the ink cartridge 1 mounted on the carriage 2 (rear side). Since the self-elastic force of the resilient member 81 is not completely extinguished even when the elevating member 80 is lowered, the free end 93 of the separator 90 does not immediately descend to the feed roller 5. As the separator 90 and the feed roller 5 are not immediately separated from each other by being kept in a close state for a while, the paper p on the knock-up plate 43 comes in and is transported. Paper has a problem of being fed back, resulting in paper jam or poor printing.

The present invention is intended to solve the problem of feeding in the separation of paper by the separator as described above, and to improve the separator structure to prevent the passing of multiple sheets by applying a constant pressure of the separator to the feed roller to prevent the feeding of paper. The purpose is.

In order to achieve the above object, the present invention allows the separator to be spaced apart from the feeding roller instantaneously by its own weight.

Therefore, the present invention loads paper and a predetermined pressure so that the pivoting knock-up plate and the paper loaded on the knock-up plate do not feed a plurality of sheets around the hinge with the first pressing pad supported by the pad housing. Separator having a second pressure pad in close contact with, the lift lever for applying a lifting force to the knock-up plate and the separator to press the feeding roller at a predetermined constant pressure, and a lever arm for applying a rotation force to the lift lever And a crankshaft configured to support and rotate the lever arm, wherein the separator is installed to be inclined diagonally with respect to the feed roller so that the lower end thereof is restrained by a hinge supported by the pad housing. At the same time the upper part is lifted when the lift lever When being installed to receive the pressing force, the termination of the pressing force of the lift lever that is immediately lowered the separator upper end by its own weight and in that characterized in that it spaced apart from the feed roller.

1 is an overall perspective view showing the inside of the printer with an automatic paper feeder,

Figure 2 is a front view showing the carriage operation and the paper feed power switching unit for the paper supply of the printer,

Figure 3 is a sectional side view of the main part of the printer showing an example of the prior art,

Figure 4 is an enlarged view of the main portion one side illustrating the drawbacks of the prior art,

Figure 5 is a cross-sectional side view of the main portion of the printer according to the present invention,

6 is an exploded perspective view showing the main portion of the present invention,

Figure 7 is an enlarged one side cross-sectional view showing a paper separation action by the separator according to the present invention,

8 is a cross-sectional side view illustrating a state where the separator of the present invention is lowered.

Explanation of symbols on the main parts of the drawings

1: ink cartridge 2: carriage

5: Feed roller 20: Feed power switching unit

21: Carriage lever 22,23: 1st, 2nd bevel gear

30: crankshaft 40,40 ': paper feeding unit

41: pad housing 42: hinge

43: knock-up plate 44: the first pressure pad

45: paper support member 50: lever arm

52: hinge boss 60: lift lever

61: hinge 62: first pressure lever portion

64: second pressing portion 70: pulling elastic member

80: lifting member 81: elastic member

90: separator 91: hinge

92: second pressure pad 93: free end

When the present invention is described in more detail based on the accompanying preferred embodiments as follows.

5 and 6 show an automatic paper feed apparatus according to the present invention. Here, the basic configuration of the crankshaft 20 and the paper feeder unit 40, which is powered by the paper feed power switching unit 20 shown in FIG. 2, is the same as the prior art described above, and thus the same. Part names and symbols are indicated.

Referring to FIG. 6, the lever arm 50 is installed on the crankshaft 30 in the paper feeding operation portion 41c of the pad housing 41 of the paper feeding unit 40. Here, the lever arm 50 installed in the paper feeder unit 40 may be completely fixed to the crankshaft 30, but in another paper feeder unit requiring movement, the lever left and right along the crankshaft 30 may be used. Arm 50 must be moved.

Therefore, the lever arm 50 forms a square hole 51 so that the lever arm 50 can be moved to the left and right while receiving rotational force from the crankshaft 30, and the crankshaft 30 of the rectangular shape is fitted thereto. Combined.

When the lever arm 50 is coupled to the crankshaft 30 as described above, the lever arm 50 can receive the rotational force of the crankshaft 30 without using a separate fixing means, and can move left and right. Of course, the positional movement of the lever arm 50 is moved by moving the pad housing 41 to the left and right.

In addition, the lever arm 50 is formed to have a hinge boss 52 and a spring engaging portion 53 on the front and rear. The hinge boss 50 is assembled in a rotatable state by being installed to engage the hinge 61 of the lift lever 60.

The lift lever 60 is provided with the 1st press lever part 62 and the spring latch part 63 in the front and back sides, and is equipped with the 2nd press part 64 in the middle. The first pressing lever part 62 is installed so that the free end 43a of the knock-up plate 43 can be lifted upward when the lift lever 60 is assembled.

Pulling elastic members 70 are provided on the spring engaging portions 53 and 63 of the lever arm 50 and the lift lever 60, and the pulling elastic members are preferably used by the tension springs.

On the second pressing portion 64 of the lift lever 60, a second pressing member 80 for pressure is installed, and the lifting member 80 is provided along the guide groove 41f on both sides of the paper feeding operation portion 41c. It can be raised and lowered.

In addition, a second pressing elastic member 81 is installed on the elevating member 80, and the elastic member 81 is centered on the hinge 91 coupled with the hinge hole 41g of the paper feeding operation portion 41c. It is installed to elastically pressurize the separator 90 installed to be rotatable.

The second pressing pad 92 which is in surface contact with the paper feed roller 5 is mounted on the upper surface of the separator 90.

The separator 90 is inclined in a diagonal direction with respect to the paper feed roller 5. In addition, the hinge 91 for enabling the separator 90 to be rotatable is positioned at the lower side of the paper entry portion, and the upper end portion is inclined so as to be positioned above the hinge 91. This is to allow the upper end portion to quickly rotate downward by the weight of the separator 90 when the elasticity of the second pressing elastic member 81 acting on the separator 90 is removed.

FIG. 7 is a cross-sectional view of one side of a state in which the paper p is loaded, and FIG. 8 shows a state in which the paper is not fed. Reference numeral 6 denotes a guide roller, and 7 denotes a paper position sensor. . In addition, reference numeral 8 is a friction roller, 9 is a medium roller that is rotated by receiving power by the power transmission wheel (9a), 9 'represents a star friction wheel.

In addition, Fig. 7 shows a state in which the first and second feed pressures that can feed and separate the paper p are generated by the paper feeder.

That is, as the carriage 2 mentioned above enters the feeding stroke section to execute the paper feeding, the linear movement is converted into the rotational movement in the paper feed power switching unit 20, and thus the crankshaft. As the 30 rotates forward, it shows that the paper feeding unit 40 is operated.

In FIG. 6, the forward rotation of the crankshaft 30 refers to a clockwise rotation, in which case the lever arm 50 also rotates in the same direction. Therefore, the hinge boss 52 in the lever arm 50 is in a state of rotating upward, thereby lifting the hinge 61 of the lift lever 60.

By the operation of the lift lever 60, the first pressing lever portion 62 of the lift lever 60 raises the free end portion 43a of the knock-up plate 43, thereby causing the hinge shaft 42 ), The knock-up plate 43 is rotated so that the paper p loaded on the first pressing pad 44 is pressed while being in contact with the paper feed roller 5. This pressurized state is a state in which the primary feeding pressure is generated, and the secondary feeding pressure is sequentially generated next.

That is, even if the crankshaft 30 is further rotated in the state where the primary paper feed pressure is generated, since the first pressing lever part 62 of the lift lever 60 does not rise further, at this time, it is shown in FIG. 7. As shown, as the hinge boss 52 of the lever arm 50 is further rotated, the lift lever 60 spring-engages the contact point between the first pressing lever 62 and the knock-up plate 43 as a hinge point. The lift lever 60 performs a secondary operation as the unit 63 is lifted up.

Therefore, the second pressing portion 64 of the lift lever 60 is lifted up, whereby the second pressing member 80 for lifting is supported to move up and down along the guide groove 41f. .

In addition, the second pressing member 80 for elevating pressurizes the second pressing elastic member 81, and the pressurizing elastic member 81 presses the pad holder 90 to press the second pressing pad 92. ) Is pressed in a state of being in close contact with the paper feed roller (5). As described above, the separator 90 presses the paper feed roller 5 as the secondary paper feed pressure.

The first and second feeding pressures are strictly generated sequentially but are generated annually in almost one second. In addition, since the first and second feeding pressures are generated when the feeding roller 5 is rotated in the counterclockwise direction, the paper p on the first pressing pad 44 is fed by the first feeding pressure. The sheet is brought into close contact with the rollers 5, and only one sheet of paper p is fed by the secondary feeding pressure applied by the separator 90, so that the sheet is separated.

That is, since the secondary feeding pressure is applied to the feeding roller 5 by the constant feeding pressure by the separator 90, only one sheet of paper is separated and fed because multiple sheets cannot be inserted.

The paper is fed until the paper p fed by the paper feed roller 5 is in contact with the friction roller 8, and when the paper fed by the paper position sensor 7 is touched, It senses and stops the driving of the paper feed roller 5.

In this state, the carriage 2 is in a state in which the forward movement is completed in the paper feeding stroke section, and immediately reverse movement is performed.

Therefore, the crankshaft 30 including the paper feed power switching unit 20 is reverse rotation, thereby lever arm 50 is also reverse rotation operation. In addition, the reverse rotation operation proceeds to the first and second reverse rotation operation, which is performed by the carriage 2 being temporarily stopped after the first reverse movement operation and then performing the second reverse movement operation as mentioned above. .

8 shows a state in which the crankshaft 30 is operated in reverse rotation. In this state, the lever arm 50 is rotated slightly in the counterclockwise direction. When the crankshaft 30 performs the reverse rotation operation, the secondary feeding pressure is released first, and then the primary feeding pressure is released.

In more detail, only the second pressing portion 64 including the spring catching portion 63 of the lift lever 60 that has been lifted to give the secondary feeding pressure is in a state of descending again, and at this time, the pulling elastic member 70 The spring engaging portion 63 is smoothly lowered to the original position by the force of).

Therefore, the second pressing part 64 is also lowered, thereby lowering the second pressing member 80 for lowering and at the same time the second pressing elastic member 81 is also lowered, so the elastic force of the elastic member 81 is lowered. The secondary feeding pressure acting on the separator 90 is released as the silver is lost and the second pressing pad 92 in the separator 90 is spaced apart from the feeding roller 5.

In addition, the crankshaft 30 is rotated further in the counterclockwise direction, and as a result, the hinge boss 52 of the lever arm 50 is also rotated downward to lower the first pressing lever part 62 of the lift lever 60. ) Also goes down.

Therefore, the free end 43a of the knock-up plate 43 is to be placed on the pad housing 41, so that the feeding roller 5 and the paper p are spaced apart from each other so that the paper cannot be fed. In this way, the paper p held between the feeding roller 5 and the friction roller 8 in the state in which the first and second feed pressures are released is reciprocated in the printing administrative section of the carriage 2 receiving a printing command. It is printed by the movement and the ink cartridge 1 mounted thereon.

When it is necessary to feed the next sheet of paper by completing printing on the loaded paper, the first and second feeding pressures are applied again so that only one new sheet is separated and fed. The feeding pressure is interrupted and then the primary feeding pressure is interrupted.

In addition, the secondary feeding pressure is applied in addition to the paper feeding, and then the separator is separated from the paper feeding roller 5 after the paper separation is made. In this case, since the hinge 91 is located below, the free end 93 is Since it descends quickly by the load, it is quickly spaced apart from the paper feed roller 5, so that the sheet does not enter the paper feed roller 5 several times, thereby preventing heavy feeding.

According to the above description, the separator separating the paper by the present invention is automatically spaced apart from the feed roller by its own weight when it is intermittent from the feed roller, thereby providing an effect of preventing heavy feeding defects in advance.

In addition, since the separator falls to its own weight, the separator has an effect of correcting the quality problem of the automatic paper feeder, and as a result, it is a useful design to improve the product reliability.

Claims (1)

A second press that is loaded at a predetermined pressure with a paper feed roller to prevent feeding of a plurality of sheets of paper loaded on the knock up plate and a rotatable knock-up plate centered on a hinge supported by the pad housing by loading the paper and the first pressing pad. A separator having a pressure pad, a lift lever for applying a lifting force to the knock up plate and the separator to press the feed roller at a predetermined constant pressure, a lever arm for applying a rotational force to the lift lever, and the lever arm In the automatic paper feed device composed of a crankshaft supported and rotatable, The separator is installed to be inclined diagonally with respect to the feed roller so that the lower end is restrained by a hinge supported by the pad housing, while the upper end is installed to receive the pressing force of the lift lever when feeding. Separator structure for preventing heavy feed in the automatic paper feeder, characterized in that when the pressing force of the lift lever is released immediately the upper end of the separator is lowered by its own weight and spaced apart from the paper feed roller.