KR910000948Y1 - Automatic and hand-operated sheet feeding device - Google Patents

Abstract

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Description

Copier Top Automatic & Manual Feeder

1 is a cross-sectional view showing a conventional paper feeder.

2 is an exploded perspective view showing an example of a conventional paper guide plate.

3 is an exploded perspective view showing another example of a conventional paper guide plate.

Figure 4 is a schematic cross-sectional view showing the configuration of the device of the present invention.

Figure 5 is a partial longitudinal cross-sectional view showing the main configuration of the device.

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

7 to 11 is a cross-sectional view showing the main configuration of the present invention, Figure 7 is a cross-sectional view showing the installation structure of the feed roll and the guide roll.

8 is a cross-sectional view showing a structure in which the manual feed guide is coupled to the lid of the paper feed cassette.

9 is a cross-sectional view showing a structure in which the lid of the paper cassette is hinged to the paper cassette body.

10 is an exploded perspective view showing the housing and the upper paper feed unit support plate.

11 is an exploded perspective view showing an upper automatic paper feed cassette and a manual paper feeder.

12a, b is a perspective view for explaining the configuration and operation of the device.

* Explanation of symbols for main parts of the drawings

21: copy basic body 22: lower paper feed cassette

23: upper feed 24: one side panel

25: upper paper feed unit 26: housing

27: paper feed roll 28: the upper paper feed unit support plate

30: top automatic paper feed cassette 31: guide plate

32: manual feeder 33: cassette cover

35: hinge axis 36: support protrusion

37: recessed portion 38: horizontal portion

39: side plate 40: recessed portion

41: jam jaw 42: jam

43: tip side 44: the locking projection

45: support leg 46: protrusion

47: step part 48: invitation home

49: shaft 50: rotation guide bush

51: rotation guide bushing support 52: guide roll

53: tension spring 54: half moon groove

56: protrusion guide 57: rack

60: pinion

The present invention relates to a copy paper feeder of a copier, and in particular, an upper feed unit equipped with an upper feeder cassette and a manual feeder is installed on the upper side of the lower feeder for automatic feeding and manual feeding through the upper feeder. It relates to a paper feeder that makes it possible.

In general, the copier has an automatic feeder and a manual feeder, as shown in FIG. 1. In the paper feed process of the manual feeder, the manual feed roll is picked up by hand and adhered to the guide plate 1. Insertion between the feeding rolls (2) causes the manual feeding roll (2) to rotate, thereby feeding the paper through the manual feeding roll (2) to the aligning roll (3) and passing through the drum (4). Is copied.

As shown in FIG. 2, the paper guide plate 1 used in the manual feeder is provided with a scale 6 for integrally forming the protrusion 5 at one side thereof and for distinguishing the size of the paper. Marked to guide the paper accurately when loading the paper for copying.

However, since only one side of the paper is guided and transported, the paper guide plate 1 has to be careful to feed the paper tightly to the protrusions 5, and sometimes when the paper is conveyed because the paper cannot be fed in close contact with the paper. Since the meandering occurs, wrinkles or folds occur, and the paper stops frequently, resulting in distortion of the copy image or partial copying.

Therefore, in order to solve such a problem, as shown in FIG. 3, two guide holes 12 are formed in the transverse direction in the center of the guide plate 11 and the protruding guide plates 13 on each guide hole 12. FIG. 13 'and the racks 14, 14' are fastened to each other with bolts 15 to face each other, and both racks 14 and 14 'are connected to the guide plate 11 with shaft pins ( It is known that the improved design to adjust the width of the two protruding guide plate 13 (13 ') by fitting to the pinion (16) bonded to the 16').

This conventional improved design is to move the pinion (16) and to engage the pinion (16) by moving the one side guide plate 13 'inward to the scale 17, the rack 14' fastened to the bottom in the same direction and As the 16 is rotated, the other rack 14 and the other guide plate 13 are moved inward. That is, when one guide plate is moved inward and outward, the other guide plate is moved inward and outward. Using this principle, the guide plates 13 (13 ') are matched to the scale (17) indicating the paper size, which is the standard, and the width is adjusted to match the size of the paper, and then the paper to be copied is provided on both side guide plates (13) (13). If the sheet is inserted and fed in close contact, the copying machine proceeds and the copying is performed.

In the conventional technique described in accordance with FIG. 1, when the manual feeder paper feed path is shared and used as an automatic paper feeder, that is, by attaching an upper paper feeder to the upper side of the lower paper feeder, If you want to use, there was a problem that can not be used with the manual feed guide plate 11 described in FIG.

The present invention has been made to solve such a conventional problem, the upper side automatic feed cassette, the manual feed device slidably coupled to the cover of the cassette, and the upper feed unit provided with a feed roll, one side of the copy base Removably installed on the panel to automatically feed the copy paper inside the automatic sheet feeder, as well as to be able to manually feed using a manual feeder, if necessary, this invention attached drawings When described in detail as follows.

As shown in Figs. 4 to 9, the upper paper feed passage 23 is formed on the upper side of the lower automatic paper feeding cassette 22 mounted on the copying base 21, and the one side panel of the copying base 21 is formed. 24, an upper feed unit 25 is installed. The upper sheet feeding unit 25 is fixed to a plurality of fasteners 29 fixed to the one side panel 24 by the feed roll 27 in the housing 26 and the support plate 28 at the bottom of the housing 26. do. Fixing member 29 fixed to one side panel 24 formed on support plate 28 “ After inserting into the ”type fixing hole 28a, it is firmly hooked and fixed, and when removed, it can be easily removed while being lifted slightly. Therefore, the upper sheet feeding unit 25 can be detachably attached to the main body 21 as needed.

The upper sheet feeding unit 25 is provided so that the upper automatic sheet feeding cassette 30 is detached together, and the manual sheet feeding device 32 having the guide plate 31 on the upper portion of the upper sheet feeding cassette 30 is also detachable. It is possible.

5, 9 and 11, the lid 33 of the upper automatic paper feed cassette 30 has its rear end portion so as to insert copy paper P or mount the manual feed apparatus 32. 34 is installed in the hinge groove (30a) formed in the main body of the cassette 30 so as to be rotated by 90 ° or more by the hinge shaft 35, the front end portion to the support projections 36 formed on the inner surface of both side walls of the paper feed cassette (30). The upper automatic paper feed cassette 30 is covered to be raised while being horizontal, and recessed portions 37 are cut out at both sides of the cassette cover 33.

The guide plate 31 of the manual feeder 32 is a rectangular plate body having a horizontal portion 38 at the tip end thereof, and side plates 39 are vertically formed at both side sides thereof, and recessed portions are formed at both side plates 39. A locking jaw 41 and a locking section 42 are formed with a gap between 40 so that both locking sections 42 are inserted into the concave portion 37 of the cassette cover 33, and the locking jaw 41 is a cover. It is made to be able to contact the front-end | tip part 43 of (33).

As shown in FIGS. 8 and 11, the lower end portions of the both side locking portions 42 are provided with the engaging protrusions 44 that are caught by the cassette cover 33, and the rear portion of the guide plate 31 is provided with the cassette cover 33. A plurality of support legs 45 in contact with the upper surface are formed.

In the guide plate 31 of the manual feeder 32, the supporting leg 45 of the rear part thereof is supported on the upper surface of the cassette cover 33, and both projections 46 of the tip horizontal portion 38 are of the upper automatic feed cassette. (30) In the state raised on the step portion 47 formed on both side walls of the main body can be moved by a predetermined interval back and forth, the locking projection 44 of the locking interval 42 is caught on the cassette cover 33 It will not be separated without permission.

FIG. 7 is an enlarged cross-sectional view showing a structure in which the paper feed roll 27 is installed on the housing 26 of the upper paper feed unit 25, and the shaft 49 is formed in the guide groove 48 formed in the upper paper feed unit support plate 28. Rotation guide bush 50 is inserted, the feed roll 27 is condensed on the shaft 49, the guide roll 52 is condensed on both sides thereof, the rotation guide bush 50 is inserted and the feed on the shaft 49 The roll 27 is condensed, the guide rollers 52 on both sides thereof are condensed, and a tension spring 53 which is elastically supported downward is fixed to the rotation guide bushing support 51. Therefore, the feed roll 27 may be elastically contacted with the upper surface of the copy paper P inside the upper automatic feed cassette 30. At this time, both side guide rolls 52 may be attached to both side walls 47 of the upper automatic feed cassette 30. It comes in contact with the circular arc receiving groove 54 formed in the groove.

In addition, the manual feeder 32 is formed in the middle of the guide plate 31, two guide holes 55 in the transverse direction, as in the prior art, which is located on the upper and lower portions of both guide holes 55 The protruding guide plate 56 and the rack 57 are fastened by bolts 58, and both racks 57 are engaged with the pinion 60, which is adhered to the lower surface of the guide plate 31 by the shaft pin 59. In the figure, 61 is a guide protrusion, 62 is a compression spring, 63 is a paper support plate, and 64 is a manual feeding roll.

When explaining the effect of the present invention made as follows.

Insert the guide plate 31 of the manual feeder 32 in the state that the copy paper P is loaded in the upper automatic feed cassette 30 and the cassette cover 33 is turned upward by 90 °, and then the cassette cover 33 is inserted. After closing, the upper paper feed cassette 30 is mounted on the upper paper feed unit 25, and the manual paper feed guide plate 31 is maintained while being completely moved in the G direction shown on the cassette cover 33.

When the upper automatic feed cassette 30 is mounted on the upper feed unit 25 in this manner, the guide roll 52 having a larger diameter than the feed roll 27 is placed on the upper surface 7 of both side walls of the upper automatic feed cassette 30. Since the paper roll 27 is inserted in a state in which the paper roll 27 is spaced apart from the copy paper P, the copy paper P accumulated on the supporting plate 63 supported by the compression spring 62 hits the paper roll 27. There is no difficulty of folding or tangling.

When the upper automatic feed cassette 30 is completely installed, the guide roll 52 descends by the force of the tension spring 53, and the feed roll 52 comes into close contact with the half moon groove 52 formed on both side walls of the upper automatic feed cassette 30. (27) is pressed down the upper surface of the copy paper (P) to be kept in close contact with the compression spring 62 to maintain the friction force.

When the upper automatic paper feed cassette 30 is installed in this way, operate the key on the control panel in the upper paper feed mode, press the copy start key, and the feed roll 27 rotates clockwise in FIG. 4 and the copy paper (P ) Is fed to the aligning roll 3 which is not driven by the feeding path 23 via the manual feed roller 64 by the frictional force (see FIG. 1), and after a predetermined time has elapsed, the aligning roll ( When a copy paper P of 10 nm or more is formed between the 3) and the manual feeding roll 64, the sheet is transferred to the drum 4 in accordance with the driving of the aligning roll 3. Thereafter, the visible image of the black powder adhering to the drum 4 is transferred to the copying paper P by electrostatic corona development, regenerated, and transported to the copying machine exit side and discharged.

On the other hand, when copying the copy paper P manually, one by one, as shown in FIG. 12A, if the manual feeder 32 is horizontally moved in the opposite direction to G, that is, forward of the cassette cover 33, the manual feeder 32 Both sides of the tip edge portion of the guide plate 31 provided in the) pushes the guide roll 52 in close contact with the vandal groove 54 to the upper surface of the guide plate 31 on the upper side.

At this time, the tension spring 53 is elongated, and the paper feed roll 27 fixed on the shaft 49 such as the guide roll 52 is separated from the upper surface of the copy paper P. In this state, when one copy sheet is inserted as shown in FIG. 12B, the copy sheet is inserted between the horizontal feeding rolls 64, and is transferred as the manual feeding roll 64 rotates by the sensor angle. Copying is performed via the inning roll 3.

As described above, the present invention enables the automatic feeding of copy paper contained in the upper sheet feeding cassette by separately attaching and attaching the upper sheet feeding unit to the manual feeding path. It is possible to feed one copy paper manually after separating the feed roll from the copy paper in the cassette by moving the guide plate horizontally in the direction of copy paper progression, so that the paper feed path is increased from two to three places. Will have The present invention has the advantage of providing an economizing paper feeder capable of serving as both automatic and manual feeding of the upper paper feeder by a simple structure having a small size.

Claims (2)

In the case where the upper paper feed passage 23 is installed above the lower automatic paper feed cassette 22 of the copying base body 21, the upper automatic paper feed cassette 30 is detachably provided inside the housing 26, and the upper automatic paper feed cassette is installed. The upper sheet feeding unit support plate has a sheet feeding sheet 27 contacting the upper surface of the copy paper inserted into the sheet 30 and a guide roll 52 contacting the half moon groove 54 formed on both side walls of the upper sheet feeding cassette 30. Both sides of the guide groove 48 of the 28 through the rotary guide bushing 50 is fixed to the shaft 49 is supported on both ends of the resilient downward support, the upper side automatic feed cassette 30 of the manual feed device 32 The top and bottom sheet feeders of the copier, characterized in that the upper sheet feeding unit 25 to be slidably coupled to the guide plate 31 is installed detachably on one side panel 24 of the copying base 21. Device. The lid 33 of the upper automatic feed cassette 30 is fixed to the rear end of the main body of the cassette 30 by a hinge pin 35, and the tip of the lid 33 has a cassette 30. The yaw formed on both sides of the lid 33 is supported on both side plates 39 of the guide plate 31 of the manual feeder 32 by being supported by the supporting protrusions 36 formed on the inner surface of both side walls of the main body. A locking section 42 which slides in the mouth 37 is formed, and a locking protrusion 44 that is caught by the lid 33 is formed at an end thereof, and the lid 33 is formed at a rear end of the guide plate 31. A plurality of supporting legs 45 are formed in contact with the upper surface of the upper surface of the guide plate 31, and both protruding portions 46 are formed on the stepped portions 47 formed on both side walls of the cassette 30 at the front end of the guide plate 31. As the front edge 38 'contacts and slides the guide plate 31, the horizontal portion 38 for pushing up the guide roll 52 is integrally formed. On the other hand, the guide plate 31, the upper end of the copier and manual feeding of the copier, characterized in that the guide plate 56 and the well-known coarse use paper bulkhead guide means made of a pinion 60, etc. is installed and configured. Device.