KR100214809B1 - Facsimile equipment - Google Patents

Abstract

The present invention has the object of lowering the unit cost of the facsimile by constructing a component of a power transmission device which transfers the power of the motor to the feed roller by a simple structure which is easy to manufacture and inexpensive. In the apparatus for transmitting power to the paper feed roller 10 for supplying the sheet to the CIS 17 one by one, both ends are integrally formed on the paper feed roller shaft 12 which is built up and rotated in the bearing 8 fixed to the main body of the facsimile machine. Feed roller gear 24 which has a feeding roller 10 rotated to and a holding jaw 25 on the side on which the feeding roller 10 is installed, is erected on one end of the feeding roller shaft 12 and is powered. And a locking means which is inserted into the paper feed roller shaft 12 in an inclined manner and corresponding to the catching jaw 25 of the paper feed roller gear 24 on one side thereof, so that power is transmitted only in one direction and on the same surface. Clutch plate 30 having projections 39 and And an auxiliary clutch plate 40 having a connecting piece 41 having an arcuate cut hole 42 into which the feed roller shaft 12 is integrally rotated and into which the protrusion 39 of the clutch plate is fitted. It features.

Description

Facsimile Feed Roller Power Train

The present invention relates to an apparatus for transmitting power to a paper feed roller of a facsimile machine, which divides a plurality of originals into sheets and transmits them automatically with a certain time difference.

In general, the facsimile machine feeds the originals to be sent one by one. When there is a large amount of originals, it is very inconvenient for the user to separate them into sheets one by one. The device was developed.

This paper feeder has a structure in which the paper feed roller that feeds the original rubs against the rubber which is in close contact with the surface of the paper feeder, and then passes through the originals only one by one. Once the sheets are separated into the CIS rollers, If it is to be transferred by the original, the original must be fed by the CIS roller at the speed at which the CIS scans. If the feed roller is rotated faster or later than the speed of the CIS roller, the feed speed of the document is fed faster or later than the scanning speed of the CIS, resulting in poor scanning. In order to overcome this phenomenon, the rotation ratio of the CIS roller should be higher than that of the feed roller, and once the original is delivered to the CIS roller, the feed roller will be twisted until the delivered document leaves the feed roller, so that there is no resistance to conveying the original. do.

In order to satisfy the conditions described above, the clutch spring is conventionally used as shown in FIG. 1.

As shown, the shaft of the feed roller gear 14 is wound around the clutch spring 16 at one end of the feed roller shaft 10 and the other end of the clutch spring 16 receives power from a motor not shown in the drawing. 15) Wrapped around the periphery.

Since the clutch spring 16 is wound when the feed roller gear 14 rotates, the clutch spring 16 tightens the outer circumference of the feed roller shaft 10 because the clutch spring 16 is wound and the motor is not shown. The power of the is to be transmitted to the paper feed roller (10). Therefore, the document is supplied to the CIS roller 18 in a sheet by the paper feed roller 10.

In addition, when the document is delivered to the CIS roller 18 by the paper feed roller 10, the document is conveyed by the CIS roller 18 from this time and the feed speed is conveyed faster than the speed of the paper feed roller 10. 10) rotates faster than the paper feed roller shaft 12. At this time, the one end of the paper feed roller 10 is formed with a locking piece 11 protruding, and on the paper feed roller shaft 12, the pin 13 for locking the above-mentioned locking piece 11 is formed to protrude. 10 is rotated so that the engaging piece 11 of the paper feed roller 10 pushes the pin 13 of the paper feed roller shaft 12, so that the paper feed roller 10 rotates the paper feed roller shaft 12. By this operation, the feed roller shaft 12 is rotated in the direction in which the clutch spring 16 is released so that the clutch spring 16 is opened so that transmission of power is blocked until the original is completely passed.

On the other hand, when the document completely exits the paper feed roller 10, the paper feed roller 10 rotated by the feed speed of the original stops, and the paper feed roller 14 rotated by a motor not shown in the drawing again. By rotating, the clutch spring 16 transmits the power to the paper feed roller shaft 12. The feed roller shaft 12 is rotated to the position of the engaging piece 11 of the feed roller 10, which is stopped again, and then rotated by the pin 13 protruding from the feed roller shaft 12. Following the supplied manuscript, it will be supplied again with an appropriate time difference.

It is difficult to manufacture a clutch spring 16 that functions to interrupt power to a conventional feed roller 10 power transmission device operated as described above. It should be designed to have a proper inner diameter for the diameter of the feed roller shaft 12 as well as to be sensitively sensitive to the frictional force with the feed roller 10 to be wound and unwound and to transfer power while having an appropriate elastic force. There are many trial and error errors when manufacturing them. Therefore, the manufacturing cost of the clutch spring 16 is increased, and the price of the facsimile is also increased. In addition, the locking piece 11 is formed at one end of the paper feed roller 10, and the pin 13, which is caught on the locking piece 11, needs to be installed on the outer circumference of the feed roller shaft 12 so that the structure is coarse and the number of parts There is a closed end to increase the manufacturing process of the paper feed roller (10).

The present invention has been made to solve such a conventional closure.

An object of the present invention is to reduce the unit cost of the facsimile and reduce the manufacturing process of the feed roller by forming a power transmission component for transmitting the power of the motor to the feed roller as a mold of a simple structure that is easy to manufacture and low cost. .

1 is a perspective view showing a main portion of a structure of an apparatus for transmitting power to a paper feed roller of a facsimile according to the related art.

Figure 2 is a perspective view showing the structure of the device for transmitting power to the feed roller of the fax according to the present invention.

3 is an exploded perspective view of a device for transmitting power to a paper feed roller according to the present invention.

Figure 4 is a detailed view of the main portion showing the structure of the clutch plate according to the present invention.

Figure 5 is a longitudinal sectional view showing the main structure of the paper feed roller and the apparatus for transmitting power to the paper feed roller according to the present invention.

6A is an operation state diagram of the clutch plate and the feed roller gear when the feed roller supplies paper.

FIG. 6B is a cross-sectional view taken along the line A-A of FIG. 6B.

Fig. 7A is an operation state diagram of the clutch plate and the feed roller gear when the CIS roller transfers paper.

FIG. 7B is a cross-sectional view taken along the line B-B in FIG. 7A.

* Explanation of symbols for main parts of the drawings

10: feed roller 12: feed roller shaft

22: jamming groove 24: feed roller gear

25: engaging jaw 26: slope

27: key pin 30: clutch plate

32: groove 33: elastic hook

34: stopper 35: locking jaw

36: locking groove 39: protrusion

40: auxiliary clutch plate 41: connecting piece

42: cutout hole

Means for achieving the object of the present invention, in the apparatus for transmitting power to the paper feed roller for supplying a plurality of documents to the CIS sheet by sheet,

A feed roller installed on a feed roller shaft whose both ends are arranged on a bearing fixed to the body of the fax and rotated;

A feed roller gear having a locking jaw on a side on which the feed roller is installed and being erected on one end of the feed roller shaft to receive power;

A clutch plate which is inserted into the feed roller shaft in a slack manner and has a structure corresponding to the locking jaw of the feed roller gear on one side thereof, and which has a locking means receiving power in one direction and a projection on the same surface;

It is achieved by consisting of an auxiliary clutch plate is formed to be integrally rotated with the paper feed roller shaft and the connecting piece having an arcuate cut hole through which the projection of the clutch plate is fitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Fig. 2, Fig. 2 is a main perspective view showing the structure of a facsimile paper feed roller driving apparatus, wherein a CIS 17 for scanning the contents of a document is provided at the tip of the facsimile. In the upper part of the CIS 17, a CIS roller 18 for conveying the original while keeping it in close contact with the scanning surface of the CIS 17 is installed.The paper feeder separates the document into sheets on the rear side of the CIS 17 and feeds it to the CIS 17. The roller 10 is provided. The feed roller 10 is fitted to the feed roller shaft 12, which is fixed at both ends by the bearing 8 fixed to the main body, and is rotatably installed. The bearing supporting both ends of the feed roller shaft 12 is installed. One of the bearings (8) is formed in the central portion of the main body, the other bearing (8) is formed on one side of the facsimile, the feed roller shaft (12) is installed on one side of the facsimile, and Since the paper feed roller 10 is ubiquitous at the end of the paper feed roller shaft 12 located at the center of the facsimile, the paper feed roller 10 is located at the center of the guide surface 9 on which the document is placed.

In addition, a hook groove 22 is formed at one end of the paper feed roller shaft 12 located at the side of the fax machine, and the paper feed roller gear 24 is arranged on the outer circumference thereof. The feed roller gear 24 is integrally formed in a structure in which a plurality of key pins 27 protruding in the axial direction at one end of the inner diameter of the feed roller gear 24 face each other, as shown in FIGS. 3 and 4. It is fitted into the engaging groove 22 of the paper feed roller shaft 12 is coupled. The feed roller gear 24 coupled as described above is coupled to the feed roller shaft 12 so as not to fall out without a separate snap ring. And on the feed roller gear 24 surface of the feed roller 10 is provided with a locking step 25 is formed with an inclined surface 26 in the opposite direction to rotate as shown in FIG.

On the paper feed roller shaft 12 on the paper feed roller gear 24 side where the locking jaw 25 is formed, the clutch plate 30 is provided so as to turn on the paper feed roller shaft 12. As shown in FIG. 5, a catching means corresponding to the catching jaw 25 of the feed roller gear 24 is formed on the side of the feed roller gear 24 of the clutch plate 30, and the protrusion 39 is formed on the other side of the catching means. ) Is formed to protrude.

The locking means is provided with a recess 32 opened toward the feed roller gear 24 and a stopper 34 in and out of the recess 32, and a stopper 34 inside the recess 32. The spring 38 which elastically protrudes toward the gear 24 is elastically installed. In addition, both sides of the groove 32 is provided with elastic hooks 33 on both sides of the stopper 34 so as not to escape the groove 32, the engaging groove (corresponding to the elastic hook 33 on both sides of the stopper 34) 36) is formed. At the end of the stopper 34 protruding by the spring 38, a locking jaw 35 corresponding to the locking jaw 25 of the paper feed roller gear 24 is formed. And the inclined surface 34a is formed in the surface of the opposite direction to which the paper feed roller 10 rotates also in the locking projection 35 formed in the edge part of the stopper 34. As shown in FIG.

The auxiliary clutch plate 40 is provided on the paper feed roller shaft 12 in the opposite direction of the clutch plate 30 provided with the stopper 34 as shown in FIG. The auxiliary clutch plate 40 has an angled surface formed on its inner diameter portion, and an angled surface is formed on the paper feed roller shaft 12 corresponding thereto, and is installed to rotate integrally with the paper feed roller shaft 12. That is, the outer circumferential surface of the paper feed roller shaft 12, on which the auxiliary clutch plate 40 is installed, has a flat shape, and the flat section of the paper feed roller shaft 12 also corresponds to a portion of the inner diameter of the auxiliary clutch plate 40. The feed roller shaft 12 and the auxiliary clutch plate 40 are integrally rotated so as to be in a shape that is consistent with each other. [Fig. 4] Further, one end of the auxiliary clutch plate 40 is a projection 39 of the clutch plate 30. ) Is bent toward the surface on which the connecting piece 41 is formed which extends parallel to the surface of the clutch plate 30. An arcuate cut-out hole 42 is formed in this connecting piece 41 to fit the projection 39 of the clutch plate 30. Therefore, power is transmitted by the notch hole 42 formed in this connection piece 41, and the protrusion 39 fitted in this notch hole 42. As shown in FIG.

In addition, the feed roller gear 24 is connected to a plurality of gear trains connected to the transmission-side motor (not shown), and the feed roller gear 24 is engaged with the CIS roller gear 19 to transmit power. .

Referring to the operation relationship of the paper feed roller drive device having such a structure as follows.

First, when a plurality of originals are settled and the transmission operation is performed, a motor (not shown in the drawing) is operated to transmit power by the gear train connected thereto, and the power is transmitted to the feed roller gear 24, and then the feed roller gear 24. Is transmitted to the CIS roller gear 19.

When the feed roller gear 24 rotates, as shown in FIGS. 6A and 6B, the engaging jaw 25 formed on one side of the feed roller gear 24 rotates to rotate the spring 38 in the groove 32 of the clutch plate 30. The clutch plate 30 also rotates together with the paper feed roller gear 24 by being caught by the catching jaw 25 of the stopper 34, which is projected by the elastic force. At this time, since the paper feed roller gear 24 and the clutch plate 30 are installed in a hollow structure on the paper feed roller shaft 12, power is not transmitted to the paper feed roller shaft 12 yet.

In addition, when the clutch plate 30 rotates, the protrusion 39 protruding from the opposite side on which the stopper 34 is installed rotates in the cutout hole 42 cut in an arc shape of the auxiliary clutch plate 40. When the end of the hole 42 is reached, the auxiliary clutch plate 40 starts to rotate. Since the auxiliary clutch plate 40 is installed to rotate integrally with the paper feed roller shaft 12, the paper feed roller shaft 12 is rotated. By rotating the paper feed roller shaft 12, the paper feed roller 10 arranged on the outer periphery is rotated to feed the originals to the CIS 17 and the CIS roller 18 in a single sheet.

When the original is fed to the CIS roller 18 by this operation, the CIS roller 18 is rotated faster than the paper feed roller 10 so that the original is fed by the rotation of the CIS roller 18 and the paper feed roller 10 is supplied. Is rotated at the feed speed of the original by the original is transferred by the CIS roller 18. Since the feed speed of the document is faster than the rotation speed of the paper feed roller shaft 12, the paper feed roller 10 and the paper feed roller shaft 12 rotate faster than the paper feed roller gear 24. On the other hand, the feed roller gear 24 installed in the idle structure on the feed roller shaft 12 rotates at a given speed irrespective of the feed roller 10 and the feed roller shaft 12 by the power of the transmitted motor. .

By this operation, as shown in FIGS. 7A and 7B, the auxiliary clutch plate 40, which is integrally rotated with the paper feed roller shaft 12, rotates faster than the clutch plate 30, so that the auxiliary clutch plate 40 is connected to the connecting piece 41. The clutch plate 30 also rotates faster than the paper feed roller gear 24 by rotating the protrusion 39 of the clutch plate 30 fitted in the cut-out hole 42.

As the clutch plate 30 rotates faster than the feed roller gear 24, the stopper 34 corresponding to the catching jaw 25 of the feed roller gear 24 is caught by the feed roller gear 24. ), The stopper 34 is caught by the rear side of the locking step 25. At this time, since the rear side of the locking step 25 and the line side of the stopper 34 form the inclined surfaces 26 and 34a, the stopper 34 is slid over and at the same time the locking step 25 of the paper feed roller gear 24. The stopper 34 enters the inside while compressing the spring 38 elastically installed in the groove 32 of the clutch plate 30 by the height.

By this operation, the stopper 34 of the clutch plate 30 and the engaging jaw 25 of the paper feed roller gear 24 are smoothly rotated without interfering with each other.

On the other hand, when the document is completely transferred to the CIS 17 and the CIS roller 18 by the operation of the paper feed roller 10 described above, the paper feed roller 10 rotated by the original is stopped, the paper feed roller gear 24 ) And the auxiliary clutch plate 40 and the clutch plate 30 is stopped. However, the paper feed roller gear 24 still rotates at a constant speed by a motor not shown in the drawing and a gear train that transmits power of the motor.

Therefore, the paper feed roller gear 24 rotates the clutch plate 30 as described above. That is, as shown in FIGS. 6A and 6B, the clutch plate 30 is rotated by engaging the stopper 34 of the clutch plate 30 at which the stopping jaw 25 of the paper feed roller gear 24 is stopped. In addition, the clutch plate 30 rotates the auxiliary clutch plate 40 with the protrusion 39 inserted into the connection piece cut-out hole 42 of the auxiliary clutch plate 30 while rotating. At this time, the projection 39 of the clutch plate 30 is located at the rear end of the cutout hole 42 of the connecting piece 41 based on the direction in which it rotates, and then moves to the tip end of the cutout hole 42. The secondary clutch plate 40 is rotated.

In addition, the auxiliary clutch plate 40 rotates to rotate the feed roller shaft 12 which is integrally rotated, and the feed roller shaft 12 rotates the feed roller 10 again.

It is important here that the feed roller gear 24 is rotated primarily so that the locking jaw 25 formed on the feed roller gear 24 corresponds to the stopper 34 of the clutch plate 30 so that power is transmitted to the clutch plate 30. The idle time until the rotation, and the second clutch plate 30 is rotated so that the projection 39 of the clutch plate 30 is moved from the rear end of the cut-out hole 42 of the connecting piece 41 to transmit the power. The idle time up to allows the time interval between the previously fed document and the later fed document. This operation allows the fax to detect the number of pages of the supplied document.

As described above, the present invention is a clutch plate 30 made of a feed roller 10 driving device which separates a plurality of originals to be transmitted into a single sheet so that automatic feeding occurs with a certain time difference. And by the auxiliary clutch plate 40, the pin 13, which is installed on the conventional paper feed roller shaft 12 and the locking piece 11 provided at one end of the paper feed roller 10 corresponding thereto is unnecessary. As a result, the number of parts is reduced, making the parts easy to manufacture, and the unit cost of the parts becomes low. Therefore, the unit cost of the facsimile can be reduced.

Claims (3)

In the apparatus for transmitting power to the paper feed roller 10 for supplying a plurality of documents to the CIS (17) sheet by sheet, the feed roller shaft (12), both ends of which are laid on the bearing (8) fixed to the body of the fax Paper feed roller 10 and a paper feed roller 10 and a locking jaw 25 on the side where the paper feed roller 10 is installed on the one end of the paper feed roller shaft 12 is installed in the idler feed roller ( 24) and the locking means and the same surface that is inserted into the paper feed roller shaft 12 in an undesired manner and corresponding to the locking jaw 25 of the paper feed roller gear 24 on one side thereof to receive power in only one direction. A semicircular clutch plate 30 having a protrusion 39 at the bottom thereof, and an arcuate cut hole 42 into which the feed roller shaft 12 is integrally rotated and into which the protrusion 39 of the clutch plate is fitted. Class of facsimile, characterized in that consisting of the auxiliary clutch plate 40, the connection piece 41 is formed Roller powertrain. According to claim 1, wherein the feed roller gear 24 is formed with a locking groove 22 around the feed roller gear (24) axis, protruding in the axial direction at one end of the inner diameter of the feed roller gear (24) A facsimile feed roller power transmission device, characterized in that a key pin (27) is caught in the locking groove (22) so that the feed roller gear (24) fitted to the feed roller shaft (12) does not fall well. According to claim 1, wherein the locking means is open toward the feed roller gear 24, the groove 32 is provided with an elastic hook 33 on both sides, and the locking groove corresponding to the elastic hook 33 on both sides ( A stopper 34 including a stopper 25 formed at an end thereof and corresponding to the stopper 25 of the feed roller gear 24, and mounted in the groove 32, and the groove 32. Facsimile feed roller power transmission device, characterized in that the spring 38 is provided elastically installed inside the stopper 34 to elastically protrude toward the feed roller gear (24).