KR20020014339A - Alternative driving device for seperate paper-feeding portions - Google Patents

Abstract

PURPOSE: A selective paper-feeding driver is provided to select one of a cassette paper feeder and a manual paper feeder depending on the rotational direction of a stepping motor without additionally using an electronic clutch and an one-way bearing by using a small stepping motor. CONSTITUTION: A selective paper-feeding driver consists of a power transfer unit(310) including a stepping motor(40) rotating forward/reversely, a pinion(41) fixed on the shaft of the stepping motor, intermediate gears(42,43,45) supplying power by converting the rotational force of the pinion clockwise or counterclockwise, and first and second driven gears(46,44) receiving power of the intermediate gears(45,43) respectively; and first and second paper feeders(320,330) feeding paper by selectively receiving the rotational force via the first and second driven gears of the power transfer unit. One of the paper feeders is used as a cassette paper feeder while the other is as a manual paper feeder. The selective paper-feeding driver uses the independent small stepping motor to reduce the capacitance of a main motor.

Description

Optional Paper Feeder {ALTERNATIVE DRIVING DEVICE FOR SEPERATE PAPER-FEEDING PORTIONS}

The present invention relates to a paper feed driving device for selectively driving a cassette feeder and a manual feeder of an office apparatus including a power transmission structure for recording paper feed. In particular, a step motor without the need for a separate electronic clutch and one-way bearing is required. The present invention relates to a selective paper feed driving device capable of selectively driving a cassette feeder and a manual feed according to one rotational direction.

In general, office equipment such as a copy machine, a printer, and the like are provided with a cassette feeder and a manual feeder, respectively, and are supplied with recording paper from each paper feeder to perform a job. In order to drive the feed rollers of each paper feeder, it is uneconomical to install a drive motor for each paper feeder. In order to transmit power to the feeder and to feed only the selected feeder as needed, a feed drive device having an electronic clutch or one-way bearing on the power transmission shaft to each feeder has been used.

A conventional paper feed driving device is briefly described with reference to FIGS. 1 and 2 as follows.

1 is a perspective view showing an embodiment configuration of a paper feed driving device according to the prior art, wherein the power of the main motor of the main body of the apparatus is used as driving power, and on the electric shaft for selective feeding from each paper feeding unit, An example with a clutch is shown.

As shown in the drawing, a conventional paper feed drive device includes a first driven gear 7 and a second driven gear via intermediate gears 3, 4, and 6 from a pinion 2 mounted at one end of a drive shaft of the main motor 1. First feed roller shaft 10 connected to the power transmission unit 110 for transmitting power to the (5), the first driven shaft (8) connected to the first driven gear (7) via an electromagnetic clutch (9). ) And a first paper feeder 120 including a first paper feed roller 11 mounted at one end of the first paper feed roller shaft 10, and a second electronic clutch in the same manner as the first paper feeder 120. (13), the second paper feed roller shaft 14 and the second paper feed roller 15 including the second paper feed roller 15. Usually, one of the first paper feeder and the second paper feeder is used for cassette feeding and the other for manual feeding.

In the conventional paper feed drive device configured as described above, the driving force in the direction of the arrow by the main motor 1 of the main body of the device is the pinion 2, the intermediate gears 3, 4, 6, the first and second driven gears. As transmitted via (5, 7), the first driven shaft 8 and the second driven shaft 12 rotate simultaneously in the direction of the arrow. When the first electromagnetic clutch 9 driven by the electronic control transmits the driving force of the first driven shaft 8 to the first paper feed roller shaft 10, the first paper feed roller 11 is rotated in the direction of the arrow to make the first Feeding is performed in the first feeder 120, and at this time, the second electronic clutch 13 is controlled to block power transmission between the second driven shaft 12 and the second paper feed roller shaft 14 so that the second paper feed roller ( 15) is stopped so that the paper feeding is not made in the second paper feeding unit 130. On the contrary, the first electromagnetic clutch 9 interrupts power transmission between the first driven shaft 8 and the first paper feed roller shaft 10, and the second electronic clutch 13 is connected to the second driven shaft 12. If it is controlled to transfer the power of) to the second paper feed roller shaft 14, the first paper feeding unit is not driven, the paper feeding is performed only in the second paper feeding unit.

Since the selective feeding and driving device configured as described above uses the power of the main motor 1 to feed the feeding part, the main motor having a relatively larger capacity must be mounted, and the two electronic clutches 9 for selective feeding driving are provided. 13) has to be additionally configured, there is a problem that the manufacturing cost increases.

2 is a perspective view showing another embodiment of the paper feeding apparatus according to the prior art, which is provided with a step motor capable of controlling the driving direction to provide power for paper feeding and selectively feeds a one-way bearing. An example of using it as a differential device is shown.

The conventional paper feed drive device configured as shown in the figure is connected to the first and second driven gears 26 and 24 from the pinion 21 mounted at one end of the drive shaft of the step motor via the intermediate gears 22, 23 and 25. A first paper feed roller via a first one-way bearing 28 at one end of the power transmission unit 210 for transmitting power and the first paper feed roller shaft 27 connected to the first driven gear 26. The first paper feeding unit 220 and the second paper feeding roller shaft 30, the second one-way bearing 31 and the second paper feeding roller 32 are provided in the same manner as the first paper feeding unit 210. The second paper feeding unit 230 is provided. Here, the first one-way bearing 28 is fastened to the first paper feed roller shaft 27 so as to transmit only the rotational force in the thick arrow direction (clockwise), and the second one-way bearing 31 is the thin arrow direction (counterclockwise). Direction) is fastened to the second paper feed roller shaft 30 so as to transmit only the rotational force.

In the conventional paper feed drive device configured as described above, when the pinion 21 rotates in the direction of a thin arrow, the driving power thereof causes the intermediate gears 22, 23, 25, the first and second driven gears 26, 24 to rotate. Transmitted via the first paper feed roller shaft 27 and the second paper feed roller shaft 30 simultaneously rotate in the direction of the thin arrow. In this case, since the first one-way bearing 28 is not configured to transmit power in the direction of the thin arrow, the first paper feed roller 29 does not rotate, and the second paper feed roller 32 is second. Power is received through the one-way bearing 31 to rotate in the d direction (counterclockwise) so that the paper is fed only from the second paper feeding unit 230. When the pinion 21 is rotated in the thick arrow direction by controlling the driving direction of the step motor in the opposite direction, the first paper feed roller shaft 27 and the second paper feed roller shaft 30 rotate in the thick arrow direction at the same time. Since the one-way bearing 31 is not configured to transmit power in the direction of the thick arrow, the second paper feed roller 32 does not rotate, and the first paper feed roller 29 is driven through the first one-way bearing 28. Received and rotated in the c direction (clockwise) is made to feed only in the first paper feeding unit 220.

In the conventional paper feed driving device configured as described above, when the paper feed driving is selectively performed in the first paper feeding unit 220 or the second paper feeding unit 230, two one-way bearings 28 and 31 are additionally used to prevent reversing. There is still a problem that the production cost of the rise.

Therefore, in order to solve the above problems, the present invention uses one small step motor as a power source for driving paper feed, but does not use a separate electronic clutch and one-way bearing in the direction of rotation of the motor. Accordingly, it is an object of the present invention to provide a paper feeding drive device that can selectively perform cassette feeding and manual feeding, thereby reducing manufacturing costs.

1 is a perspective view showing an embodiment of a paper feeding drive device according to the prior art.

Figure 2 is a perspective view showing the configuration of another embodiment of a paper feeding drive device according to the prior art.

Figure 3 is a perspective view showing the configuration of one embodiment of a paper feeding drive apparatus according to the present invention.

4 is a perspective view showing the structure of a paper-feeding unit which is a main part of the present invention;

Figure 5 is a front view showing the configuration of an embodiment of a paper feeding drive apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

40: step motor 41: pinion (Pinion)

42: middle gear 43: middle gear

44: second driven gear 45: intermediate gear

46: 1st driven gear 47: 1st feed roller shaft

48: first protruding ring 49: first serrated ring

50: first paper feed roller 51: second paper feed roller shaft

52: 2nd protruding ring 53: 2nd serrated ring

54: second paper feed roller 310: power transmission unit

320: first paper feeder 330: second paper feeder

In order to achieve the above object, the present invention, a step motor capable of forward / reverse rotation; Power transmission means for transmitting the rotational power of the step motor to one side and the other direction; First and second paper feeding means including a paper feed roller shaft and a paper feed roller fitted to the paper feed roller shaft, the paper feed roller being supplied with power from the power transmission means to feed recording paper; And a differential means provided in the first paper feeding means and the second paper feeding means, respectively, to transmit or cut power according to the rotational direction of the step motor.

Hereinafter, with reference to the accompanying drawings of Figure 3 attached to one embodiment of the paper feeding drive apparatus according to the present invention will be described in detail.

In the figure, 40 is a step motor, 41 is a pinion, 42, 43 and 45 are intermediate gears, 44 is a second driven gear, 46 is a first driven gear, 47 is a first feed roller shaft, and 48 is a first projection. Gluing ring, 49 is the first feed ring, 50 is the first feed roller, 51 is the second feed roller shaft, 52 is the second projection ring, 53 is the second feed ring, 54 is the second feed roller, 310 Silver power transmission unit, 320 is the first feeder, 330 is the second feeder.

The paper feed driving device according to the present invention is implemented to reduce the manufacturing cost by providing a differential means for replacing a clutch or a one-way bearing that is mounted for selective paper feeding at different paper feed units of office equipment. As shown in FIG. 5, the step motor 40 capable of forward / reverse rotation, the pinion 41 fixed to the shaft of the step motor 40, and the rotational force of the pinion 41 are rotated in a predetermined direction (clockwise). Direction of the intermediate gears 42, 43, and 45 to transfer power by turning in the counterclockwise or counterclockwise direction, and the first driven gear 46 and the intermediate gear 43 to which the intermediate gear 45 is powered. A power transmission unit 310 including a second driven gear 44 that receives power and selectively receives rotational force through the first and second driven gears 46 and 44 of the power transmission unit 310. It consists of a first paper feeder 320 and a second paper feeder 330 for feeding the recording paper, One of the first and second paper feeding units 320 and 330 performs cassette feeding, and the other performs manual feeding. Here, the first and second paper feeders 320 and 330 have the same configuration, and only the first paper feeder 320 will be described in this embodiment.

That is, as shown in FIG. 4, the first paper feeder 320 receives power from the first driven gear 46, and D-cutting portions 47b are formed at both ends thereof. A first paper feed roller shaft 47 having a stepped portion 47a formed at an intermediate portion thereof, and a first support pipe fitted to one side of the first paper feed roller shaft 47 to feed recording paper, and protruding from one side thereof; 50a) and a first paper feed roller 50 including a first tooth 50b provided on an outer surface of the first support pipe 50a, and fitted to the first support pipe 50a. A second tooth 49a meshing with the first tooth 50b is provided on a side surface, and a first toothed ring 49 having a slanted surface formed to be slidable on the other side thereof and the first paper feeder. The D-hole 48a is formed so that the D-cutting portion 47b of the roller shaft 47 is fitted, and the first protrusion 48b slides on the inclined surface of the first toothed ring 49 on one surface thereof. ) Is provided with a first protruding ring 48 provided with do. Here, the first feed ring ring 49 is the first paper feed roller 50 so that the first projection (48b) rises on the inclined surface when the first projection ring 48 is rotated in the clockwise direction It is pushed to the side, the second tooth 49a of the first toothed ring 49 and the first tooth 50b of the first paper feed roller 50 is a structure capable of transmitting only a clockwise rotational force, The first paper feed roller 50 is configured not to be pushed toward the first driven gear 46 by a step 47a formed on the first paper feed roller shaft 47.

In FIG. 3, reference numeral 330 in FIG. 3 is a second paper feeder, and the second paper feeder is configured in the same form as that of the first paper feeder 320 on one side of the second paper feed roller shaft 51 to which the power of the second driven gear 44 is transmitted. The paper feed roller 54, the 2nd toothed ring 53, and the 2nd protrusion ring 52 are included. Here, the second toothed ring 53 is pushed toward the second paper feed roller 54 when the second projection ring 52 rotates in a counterclockwise direction, the second paper feed roller 54 The third tooth 54a and the fourth tooth 53a provided in the second toothing ring 53 are configured to transmit only a counterclockwise rotational force.

The operation state of the paper feed drive device according to the present invention configured as described above will be described with reference to FIG.

When feeding to the first paper feeding unit 320, the step motor 40 provides a rotational force in the direction of the thick arrow, the intermediate gear (42, 45), the first driven gear 46 and the first paper feed roller shaft (47) When the first protruding ring 48 rotates in the thick arrow direction by the driving force transmitted through), the projection 48a of the second protruding ring 48 forms an inclined surface formed on the first toothed ring 49. As the first toothed ring 49 is pushed toward the first paper feed roller 50, the second teeth 49a are engaged with the first teeth 50b of the first paper feed roller 50. Accordingly, the first paper feed roller 50 is rotated in the direction of the arrow e to feed paper from the first paper feeder 320. At the same time, the second protruding ring 52, which is fastened to the second paper feed roller shaft 51 by the driving of the step motor 40, also rotates in the direction of the thick arrow, but at this time, the second protruding ring 52 The projection 52a is formed to descend along the inclined surface 53a of the second toothed ring 53 to release the forced restraint force toward the second paper feed roller 54 with respect to the second toothed ring 53. Since the arrangement direction of the 3rd teeth 54a and the 4th teeth 53a is a structure which does not catch each other when the 2nd toothed ring 53 rotates to a thick arrow direction, it has passed through the 2nd paper feed roller shaft 51. Since the driving force is not transmitted to the second paper feed roller 54, the paper feeding is not performed at the second paper feeder 330.

When feeding from the second paper feeding unit 330, the step motor 40 provides the rotational force in the opposite direction as described above, so that the driving force in the thin arrow direction rotates the second projection ring 52. When the second projection ring 52 is rotated in the direction of the thin arrow, the second tooth ring 53 is pushed toward the second paper feed roller 54 by the second projection 52a to form the fourth tooth 53a. As the second meshing roller 54 is engaged with the third teeth 54a of the second paper feed roller 54, the second paper feed roller 54 is rotated in the direction of the arrow f to feed paper from the second paper feed unit 330. At this time, the driving force in the direction of the thin arrow is also transmitted to the first protruding ring 48, but the rotational direction is such that the first toothed ring 49 does not transmit power to the first paper feed roller 50 by the above configuration. Since the paper feed direction cannot be fed in the first paper feeding unit.

In the paper feed driving device configured as described above, the paper sheet is driven in the first paper feeding unit 320, and the paper sheet fed in the e direction by the first paper feeding roller 50 includes the main body of the office device. The step motor 40 is controlled to stop when it is supplied by the resist roller of the first roller. Accordingly, the first protruding ring 48 is also stopped. The primary paper feed roller 50 is rotated in the direction of the thick arrow together with the first toothed ring 49. In this case, when the first toothed ring 49 rotates, the forced restraint force by the first protrusion 48a acting on the first toothed ring 49 while the step motor 40 is driven is released. Since the first paper feed roller 50 rotates in a rotational direction in which the first teeth 50b and the second teeth 49a are not caught, smooth feeding is achieved. In the same principle, when the recording paper supplied by the second paper feed roller 54 is supplied by the resist roller, the second paper feed roller 54 prevents the second toothing ring 53 from interfering with the above configuration. Since the paper is rotated along the paper feed direction without receiving, smooth feeding is also performed in the second paper feeding unit.

In the embodiment according to the present invention configured as described above, the power transmission unit 310 is composed of a pinion 41, a plurality of intermediate gears (42, 43, 45), and driven gear (44, 46) is attached to the accompanying drawings It is not limited to the gear transmission illustrated in the example, but may be replaced by various types of transmissions including a plurality of belts and pulleys, or a plurality of friction wheels.

The selective feed type paper feed driving device according to the present invention described above is not limited by the following claims and the accompanying drawings, and is conventional in the technical field to which the present invention belongs without departing from the technical spirit of the present invention. Various substitutions, modifications and changes that can be made by those skilled in the art are also within the scope of the present invention.

According to the present invention configured and operated as described above, the capacity of the main body of the apparatus can be reduced by using an independent small step motor for feeding the office equipment, and for selective feeding driving, that is, cassette feeding and manual feeding There is an effect of reducing the manufacturing cost of the paper feeding device by improving the structure of the paper feeding device so that the electronic clutch or one-way bearing is not required.

Claims (4)

A step motor capable of forward / reverse rotation; Power transmission means for transmitting the rotational power of the step motor to one side and the other direction; First and second paper feeding means including a paper feed roller shaft and a paper feed roller fitted to the paper feed roller shaft, the paper feed roller being supplied with power from the power transmission means to feed recording paper; And Differential means provided in each of the first paper feeding means and the second paper feeding means for transmitting or cutting power according to the rotational direction of the step motor Optional paper-type paper feed drive device comprising a. The method of claim 1, The power transmission means Optional feed type including a pinion provided on the shaft of the step motor, at least one intermediate gear, a first driven gear to transmit the rotational force to the first paper feeder, and a second driven gear to transmit the rotational force to the second paper feeder Feed drive unit. The method of claim 1, The paper feed roller shaft includes a D-cutting portion formed at both ends thereof, and a stepped portion formed at a predetermined portion at a central side thereof to prevent the paper feed roller from being pushed to one side. The method of claim 1, The differential means A first tooth provided at one end of the paper feed roller, A toothed ring fitted to a support tube provided in the paper feed roller, and having a second tooth engaged with the first tooth on one side thereof, and an inclined surface formed on the other side thereof to allow sliding; D-hole is formed so that the D-cutting portion of the paper feed roller shaft is fitted, and the protruding ring is provided with a protrusion for sliding on the inclined surface of the toothed ring on one surface thereof. Optional paper-type paper feed drive device comprising a.