KR100193845B1 - Facsimile Paper Feeder - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

The present invention relates to a facsimile paper feeder.

I. The technical problem to be solved by the invention.

The present invention is to provide a facsimile paper automatic feeder that can reduce the manufacturing cost by using the forward and reverse rotational power of the drive motor, to prevent the occurrence of residual magnetic force to provide accurate operation reliability.

All. Summary of the Solution of the Invention.

According to the present invention, when the center gear is engaged with the motor gear of the drive motor, and the two satellite gears connected by the link to the center gear are spaced apart from each other, the drive motor is rotated forward by the detection of the sensor when paper is inserted into the paper insertion unit. And the satellite gear is engaged with the first transfer gear and the transfer gear by the binding force of the link according to the forward rotation of the drive motor, and the pick-up roller, the feed roller, and the transfer gear are transferred by the transfer gear and the transfer gear meshed with the transfer gear. The roller transfers the paper by receiving power, and when the state of the paper being conveyed is detected by the sensor, the driving motor rotates in reverse and maintains the space of the paper being conveyed continuously according to the reverse rotation of the driving motor. The satellite gear is engaged with the transmission gear to separate the sheets one by one, and the power is transmitted by the transmission gears so that the first and second conveying rollers are single. It is characterized by conveying the paper thickly.

la. Important use of the invention.

The present invention is to change the gear arrangement of the drive mechanism for driving the pickup roller and the paper feed roller to transfer power or short circuit in accordance with the rotational direction of the drive motor, eliminating the expensive power switching device to reduce the production cost and high reliability It is effective in providing the paper feed operation.

Description

Facsimile Paper Feeder

The present invention relates to a paper automatic feeder that feeds paper one by one, for example, in an automatic document feeder of a facsimile or an automatic paper feeder of a printer, and the like. The present invention relates to an automatic paper feeder using the reverse rotational power of the drive motor by changing the gear arrangement of the driving mechanism to reduce the pressure.

In general, in order to implement an automatic paper feed function in a paper feed tray in which a plurality of sheets are loaded, the stacked sheets of sheets must be separated by sheets and transported to a feed roller. At this time, in order to provide such a transfer force, a pick up roller and a finger are initially installed in the paper loading part so that the pick up roller is supported by the support of the paper support held by the compression coil spring. It is configured to be fed to the feed roller one by one in close contact with the paper.

At this time, by rotating the pickup roller which is powered by a driving motor, since the pickup roller is made of rubber, it is transferred to the feed roller due to the friction between the rubber and the paper surface. . The paper conveyed by the pickup roller is drawn between the feeding roller and the idle roller rotating in the same direction and is controlled by the conveying roller. The paper is conveyed at a specific pitch and speed according to a necessary criterion due to the characteristics of the product.

This is because the feed speed of the paper is different according to the linear speed of the roller and the friction surface according to the rotation of the roller. The rotational speed of the automatic feed roller is faster than the pickup roller, and the speed of the feed roller must be faster than the automatic feed roller. In this roller speed difference, once the paper being conveyed is controlled by the feed roller, the pickup roller no longer rotates and should be stopped for a while to separate from the next paper. When the paper was separated at any distance from the next paper through any position, the paper was conveyed at intervals by repeating the function of connecting and re-shorting the driving force to the pickup roller again.

As described above, a separate power switching drive unit such as a magnetic clutch or a solenoid switch has conventionally been used to transfer the power of the pickup roller, and then short and then transfer it again.

Figure 1 shows a facsimile paper automatic feeding device using a magnetic clutch according to a conventional embodiment. As shown in FIG. 1, the pick up roller assembly installs a magnetic clutch 34 at one end of the shaft 33 of the pickup roller 32, and turns on the magnetic clutch 34. In response to the on / off, the driving force transmitted from the driving motor is transmitted to the pickup roller gear 35 through the transmission gear 36. At this time, by connecting the power and the short circuit in the magnetic clutter, the distance of the paper being transferred is maintained and conveyed sheet by sheet. Such power transmission and short circuit of the magnetic clutch 34 can be easily understood by those of ordinary skill in the art, so detailed description thereof will be omitted.

Figure 2 shows a facsimile paper feeder using a solenoid switch according to another embodiment of the prior art, Figure 3 is a side view showing the operation thereof.

As shown in Figures 2 and 3, the pick up roller assembly is installed on one side of the bushing 44 as the power is turned on / off to a solenoid switch. It functions to connect and short-circuit the driving force of the driving motor received according to the operation of the spring clutch 45 through the stopper 44a to the pickup roller 42 through the transmission gear 48. Power transmission and short-circuit functions of the solenoid switch 46 can also be easily understood by those skilled in the art.

As described above, in the pickup roller assembly, the reason of periodically powering or shorting the pickup roller, that is, the repetition of the rotation and stop of the pickup roller continuously feeds the feed rollers one by one by interposing the sheets being continuously fed. For sake.

However, in the sheet feeding apparatus for conveying sheet by sheet using the above magnetic clutch or solenoid switch, when using the auxiliary roller in the flat sheet feeding apparatus, a separate clutch such as a magnetic clutch or a solenoid switch is used to control or drive the auxiliary roller. Drive power connection and short circuit were implemented by using power switching drive unit of, but these price was very expensive and it was a major factor to increase manufacturing cost.

Furthermore, since the magnetic clutch or solenoid switch is a separate drive unit, in order to operate the magnetic clutch or solenoid switch, a dedicated port and a drive IC must be installed in the drive circuit, which also converts an electric force into a magnetic force to implement a function, thereby prolonged use or frequent use. When this is done, a serious problem occurs that residual magnetic force is generated and the reliability of the operation is lowered.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention by using the forward and reverse rotational power of the motor without using a separate drive unit for the transmission of power and the implementation of a short circuit cost It is to provide a facsimile paper feeder that can reduce the cost.

Another object of the present invention is to provide a facsimile paper feeder capable of providing reliable operation by preventing the occurrence of residual magnetic force by not using an expensive power switch drive unit.

In order to achieve the above objects, the most preferred embodiment according to the technical idea of the present invention is to engage the center gear to the motor gear of the drive motor, the two gears of the satellite gear connected by the link to the center gear spaced apart When the paper is inserted into the insertion part, the driving motor rotates forward by sensing of the sensor, and the satellite gear meshes with the first transfer gear and the transfer gear by the binding force of the link according to the forward rotation of the drive motor, The plunger roller, the feed roller and the feed roller transfer power by the transfer gear and the transfer gear meshed with the transfer gear, and when the state of the conveying paper is detected by the sensor, the driving motor rotates in reverse. The satellite gear is a transmission gear in order to separate the sheets being conveyed continuously at intervals according to the reverse rotation of the driving motor. Engage and further characterized by receiving power of the first and second transport roller Sikkim conveying a sheet by sheet by the transmission gear.

1 is a schematic configuration diagram showing an operating state of the automatic paper feeder of a facsimile according to a conventional embodiment

2 is a schematic configuration diagram showing an operating state of a facsimile paper sheet automatic feeding device according to another embodiment of the related art

3 is a side view showing the operating principle of FIG.

Figure 4 is a perspective view schematically showing the configuration of the automatic paper sheet feeder of the facsimile according to an embodiment of the present invention

5, 6 is a configuration diagram of the gear arrangement showing the operating principle of the automatic paper sheet feeder of the facsimile according to an embodiment of the present invention

7 is a schematic configuration diagram showing a path through which paper is fed in a paper sheet automatic feeding apparatus of a fax according to an embodiment of the present invention;

Explanation of symbols on the main parts of the drawing

1: pick-up roller 2, 8: clutch spring 3: pick-up roller gear

4: Optical sensor 5: Indicator 6, 10, 11, 19: Transmission gear

9: Automatic paper feed roller 12, 17: Satellite gear 14: Central gear

15: drive motor 13: link 21, 22: feed roller

23, 29; Sensor 25, 27: Separator 26; Compression coil spring

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention. First, in describing each of the drawings, the same components have the same reference numerals as much as possible even though they are shown in different drawings. In describing the present invention, when it is determined that description of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Figure 4 is a perspective view schematically showing the configuration of the automatic paper sheet feeder of the facsimile according to the most preferred embodiment of the present invention. Referring to the drawings,

The main driving mechanism of the automatic paper feeder of the facsimile machine includes: a pickup roller assembly for feeding paper sequentially one by one from a plurality of paper feed trays; a paper feed roller assembly for feeding a fixed speed to the loaded paper; And a driving mechanism in which a plurality of gears for driving the pickup roller and the paper feed roller are engaged.

In order to repeatedly transmit and short-circuit power to the pickup roller in such a facsimile, components of the pickup roller assembly of the facsimile machine include a pickup roller 1 having a half moon-shaped cross section for feeding paper sheet by sheet, and the pickup roller 1. The clutch spring (2) for intermittent motive power, the indicator (5) provided on the gear (3) of the pickup roller for positioning the pickup roller (1), and the planar position of the pickup roller (1). It consists of an optical sensor (4) for detecting the position of the indicator (5: detecting). According to this structure, the plane direction of the pickup roller is sensed.

In detail, when the power is transmitted by the rotation of the drive motor 16, and the pickup roller 1 rotates, the pickup roller 1 should smoothly feed the sheets one by one, and the pickup roller 1 In order to determine the initial position of the roller because the cross section of the cross-section) is formed, the indicator 5 is formed to protrude in comparison with the prior art, and the sensor 4 which detects the initial position of the pickup roller in accordance with the presence or absence of the indicator 5: sensor) is activated. That is, an optical sensor is most suitable for detecting the position of the indicator. Therefore, the pickup roller 1 starts to rotate in the planar position by the optical sensor 4 to the initial position.

Since the paper feed roller assembly is configured in the same manner as in the prior art, it will be omitted. In addition, the driving mechanism for driving the pickup roller 1 and the paper feed roller 9 will be described only in comparison with the conventional one.

The center gear 14 is engaged with the motor gear 15 of the drive motor 16, and the two gears 12 and 17 connected to the link 13 are engaged with the center gear 14 to drive the motor 16. The gears are arranged to give the space of the paper to be conveyed by engaging the different gears 11, 18 and 19 with the satellite gears 12 and 17 in accordance with the forward and reverse rotation of.

First, as shown in Figs. 5 and 6, before explaining the paper feeding process, a pickup mechanism or a driving mechanism for driving the paper feed roller, which is a main component of the present invention, will be described as an example in which a plurality of gears are arranged. The basic power transfer path will be described. This is explained based on the process of connecting and short-circuiting power to the pickup roller and the feed roller in accordance with the change of the gear arrangement.

When describing a plurality of gear arrangement state of the power drive unit, the center gear 14 is meshed with the motor gear 15 of the driving motor 16 which is the center of all the power, and the center gear 14 has two gears. Two satellite gears 12 and 17 are installed to be engaged by the bent link 13 while maintaining the spaced apart state. The two planetary gears 12 and 17 change the power transmission path by engaging the gears according to the rotational direction of the motor. When the driving motor 16 rotates clockwise (forward), as shown in FIG. Similarly, the center gear 14 meshed with the motor gear of the drive motor rotates counterclockwise, and one satellite gear 12 meshed with the center gear 14 and clockwise rotates to the restraint force of the link 13. By moving in the direction of the arrow by the first transmission gear 18 and the transmission gear 11 at the same time, the other satellite gear 17 maintains the idle state.

As the one planetary gear 12 rotates clockwise, the transmission gear 11 rotates counterclockwise, and the transmission gear 10 engaged with the transmission gear 11 rotates clockwise, The feed gear 7 meshed with the transmission gear 10 rotates counterclockwise. Subsequently, the transmission gear 6 meshed with the feed gear 7 rotates clockwise, and the pickup roller gear 3 meshed with the transfer gear 6 rotates counterclockwise. Therefore, the paper 100 is fed in accordance with the forward rotation of the pickup roller 1, and the paper is fed to the feed rollers 21 and 22 at the same speed by the feed roller 9.

Further, the first transfer gear 18 meshed with one satellite gear 12 rotates counterclockwise, and the transfer gear 19 meshed with the first transfer gear 18 rotates clockwise. The second transfer gear 20 engaged with the gear 19 transfers paper by rotating counterclockwise.

The power transmission paths according to the plurality of gear arrangements are driven by one satellite gear 12 according to the rotational direction of the motor, the gear 3 of the pickup roller, the gear 7 of the feed roller, and the gear 18 of the feed roller. 20) means that a plurality of rollers rotate to convey the paper.

As shown in FIG. 6, when the paper being continuously conveyed passes through the sensor 23, when the driving motor 16 rotates counterclockwise (reverse rotation) by the detection of the sensor 23, the driving motor The central gear 14 meshed with the motor gear of the motor rotates in a clockwise direction, and according to the rotation of the center gear 14, the satellite gear 17 having another constraint force of the link 13 is transferred to the transmission gear 19. To interlock. At this time, one satellite gear 12 maintains an idle state.

The first transfer gear 18 and the second transfer gear 20 meshed with the transfer gear 19 rotate in the counterclockwise direction to transfer the paper. At this moment, since the power is short-circuited for a short time between the pickup roller and the paper feed roller, the paper being transferred moves forward faster than the following paper. Therefore, the feed roller is discharged toward the discharge portion while maintaining the gap by feeding the paper while the rotation of the pickup roller and the feed roller stops.

As shown in Figs. 5 and 6, as a result, the driving motor 16 is rotated by transmitting power to the pickup roller and the feed roller according to the rotational direction (repetitive forward and reverse rotation during paper transfer). In other words, it implements a structure that prevents rotation by cutting off power.

As described in the prior art, in order to feed the paper one by one, a gap must be generated between the paper and the paper, and for this purpose, the rotation of the pickup roller and the feed roller was temporarily stopped by using a magnetic clutch or a solenoid switch. In the present invention, by changing the arrangement of the gear arrangement to stop the rotation of the pickup roller and the feed roller for a while to implement a structure that separates each sheet.

The paper feeding process will now be described with reference to FIG. 7.

When the power is applied, the sensor 29 and the indicator detect the direction in which the plane of the pickup roller is placed so as to be directed in a specific direction in the plane direction of the pickup roller so as not to interfere with the initial paper insertion. Subsequently, one side of the paper feed tray on which a plurality of sheets of paper are stacked is held by the compression coil springs 26 and 28 so that the separating plates 25 and 27 are installed to be in close contact with the pickup roller 1 and the paper feeding roller 9. By doing so, the sheet is moved forward by sheet by the rotation of the pickup roller (1), at this time the sensor 29 detects the sheet insertion state. The separation plates 25 and 27 are installed on one side so as to be supported by a compression coil spring in order to prevent the feeding (that is, the phenomenon of conveying two or more sheets at a time) during paper transfer.

In this case, the drive motor rotates clockwise. The drive motor rotates the pickup roller, the paper feed roller, and the transfer roller via each gear to feed the paper.

When the paper is continuously conveyed and placed on the sensor 23, the rotational direction of the drive motor becomes counterclockwise as a starting point, and the power to the paper feed roller 9 or the pickup roller 1 is short-circuited. Therefore, only the feed roller is rotated counterclockwise to feed the paper toward the discharge roller. At this moment, the speed difference is generated between the paper that is moving forward and the paper that follows and the paper that is continuously being transported.

When the end of the continuously conveyed paper reaches the position of the sensor 23, and when it is not necessary to load the next sheet, it continues to drive in the counterclockwise direction to finish the conveyance. When the next paper is to be loaded, the drive motor returns to the initial state by rotating the motor clockwise again.

As a result, the rotation of the pickup roller and the paper feed roller is transmitted and shorted in accordance with the rotational direction of the motor, and a plurality of sheets of paper are continuously conveyed one by one during transfer.

As described above, the present invention is to change the gear arrangement of the drive mechanism for driving the pickup roller and the paper feed roller to transfer power or short circuit in accordance with the rotational direction of the drive motor, thereby eliminating expensive power switching device to reduce the production cost It is effective in providing high reliability paper feeding operation at the same time as saving. On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, it is obvious to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Claims (3)

In the automatic paper feeder of the facsimile machine, The center gear 14 is engaged with the motor gear 15 of the drive motor 16, and the two satellite gears 12 and 17 connected by the link 13 to the center gear 14 are spaced apart from each other. When the paper is inserted into the insertion part, the driving motor 16 rotates forward by the detection of the sensor 29, and the satellite gear (B) by the binding force of the link 13 according to the forward rotation of the drive motor 16. 12 is engaged with the first transfer gear 18 and the transfer gear 11, and the pick-up roller 1 is driven by the transfer gears 10 and 19 engaged with the transfer gear 11 and the first transfer gear 18. And the feed roller 9 and the feed roller 21 transfer the paper by receiving power, and the driving motor 16 reversely rotates when the paper being continuously conveyed is detected by the sensor 23. The satellite gear 17 meshes with the transmission gear 19 to separate the sheets being conveyed continuously at intervals as the motor 16 rotates in reverse. And, the paper automatic feeding device of a facsimile for receiving power by the transmission gear 19 are the first and second feed rollers (21, 22) characterized in Sikkim conveying the sheet by the paper. 2. The automatic paper sheet feeder of a fax machine according to claim 1, characterized in that a sensor (4) and an indicator (5) are provided to detect a planar direction of the pickup roller (1). A paper sheet automatic feeding device according to claim 1 or 2, characterized in that the sensor (4,29) is an optical sensor.