KR20010038778A - Cleaning apparatus for transfer roller of printing device - Google Patents

Abstract

PURPOSE: A cleaner for a transcribing roller of a printer is provided to clean a surface of a cleaning roller which cleans a transcribing roller of a printer. CONSTITUTION: A cleaning roller(30) contacts to a transcribing roller(17), and a heater(32) is operated to heat the cleaning roller. The cleaning roller contacts closely to the transcribing roller by a second elastic member(67) and alien substances on the transcribing roller are transferred to the cleaning roller. For cleaning the cleaning roller, a second motor(61) is actuated to operate a cam gear(69). The cleaning roller is moved with an inner frame(63) by the cam gear, and separated from the transcribing roller. Then, a first motor(51) is actuated to rotate a first stroke gear(55). A second stroke gear(57) is repeatedly separated or coupled from/to the first stroke gear by the rotation of the first stroke gear and a first elastic member(53). Thus, a supporting member(44) performs a linear reciprocating motion, and cutters(42) formed at the supporting member removes the alien substances from the cleaning roller. Simultaneously, a third motor(71) is actuated to rotate the cleaning roller to more securely remove the alien substances.

Description

Cleaning apparatus for transfer roller of printing device

The present invention relates to a transfer roller cleaning apparatus for a printing press such as a printer or a copying machine.

FIG. 1 schematically shows a conventional electrophotographic printer as an example of a printing press. The conventional printer illustrated is a photosensitive belt 10 supported by a plurality of support rollers 11 and traveling on an endless track, and a main charger for uniformly charging the surface of the photosensitive belt 10 to a predetermined potential ( 12) an LSU (Laser scanning unit) 13 which scans light with the photosensitive belt 10 to form an electrostatic latent image, and a solid toner of a predetermined color and a liquid carrier in the latent electrostatic image area. A developing unit 14 for developing and squeezing ink to form a toner image, a drying unit 15 installed downstream of the developing unit 14 to dry the toner image of the photosensitive belt 10, and the dried toner The transfer unit 16 for transferring an image to the printing paper P by the difference in surface energy is provided.

The transfer unit 16 is the contact roller rotates in contact with the photosensitive belt 10, the first printing the transfer roller 17 receives the toner image of the photosensitive belt 10 and the transfer roller 18 by contact pressure printing therebetween And a pressure roller 18 for causing the toner image transferred to the transfer roller 17 to the paper P to be secondarily transferred.

On the other hand, in the above configuration, the toner image of the transfer roller 17 is not completely transferred to the printing paper P in the transfer process, and the transfer to the next transfer process is carried out with a small amount of toner particles remaining, or the printing paper. When fine dust, dust particles, and the like transferred from (P) remain in the transfer roller 17 and accumulate, the surface of the transfer roller 17 is contaminated, thereby contaminating the printing paper P.

In view of this, as shown in the figure, a cleaning roller 20 which is rotated in contact with the transfer roller 17 in order to clean the transfer roller 17, and a cleaning having a heater 22 provided in the cleaning roller 20 The device was further equipped. The cleaning roller 20 is in contact with the transfer roller 17 in a heated state by the heater 22 and driven rotation to transfer the waste toner and the like on the surface of the transfer roller 17 by the difference in surface energy, The roller 17 was cleaned.

However, in the above configuration, since waste ink and the like transferred to the cleaning roller 20 continue to accumulate on the surface of the cleaning roller 20 as time passes, the cleaning roller 20 effectively removes the transfer roller 17 after a certain period of time. You cannot clean it. Therefore, in order to continuously clean the transfer roller 17, the waste toner, etc. accumulated on the surface of the cleaning roller 20 should be removed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a transfer roller cleaning apparatus of a printing machine having an improved structure to clean the surface of the cleaning roller cleaning the transfer roller.

1 is a configuration diagram schematically showing a conventional printing machine.

2 is a schematic configuration diagram of a transfer roller cleaning apparatus of a printing press according to an embodiment of the present invention.

3 is a cross-sectional view of the transfer roller cleaning device of the printing press shown in FIG.

Figure 4 is a perspective view of the transfer roller cleaning device of the printing press shown in FIG.

5 is a partial plan view for explaining the operation of the transfer roller cleaning apparatus of the printing press according to the embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10. Photosensitive belt 17. Transfer roller

30. Cleaning roller 32. Heater

42. Cutter 44. Support member

51. The first driving motor 53. The first elastic member

55,57.1st, 2nd stroke gear 61..2nd drive motor

63..inner frame 65..outer frame

67 2nd elastic member 69 .. Cam gear

71..3rd drive gear

The transfer roller cleaning device of the printing press according to the present invention for achieving the above object, while removing the foreign matter on the surface of the transfer roller while rotating in contact with the outer peripheral surface of the transfer roller for transferring the toner image formed on the photosensitive medium of the printing machine to the printing paper In the transfer roller cleaning apparatus of the printing machine comprising a cleaning roller for cleaning and a heater installed in the cleaning roller, the cleaning roller to remove foreign matter attached to the cleaning roller while reciprocating a predetermined distance in the longitudinal direction of the cleaning roller. A plurality of cutters disposed at predetermined intervals in contact with the roller surface; A support member installed in parallel with the cleaning roller to support the cutter; Moving means for reciprocating the support member in the longitudinal direction of the cleaning roller such that the cutter scrapes off foreign matter on the surface of the cleaning roller; And detachable means for contacting and separating the cleaning roller from the transfer roller and the cutter.

Here, the moving means and the drive unit; A first elastic member elastically pressing one end of the support member in the longitudinal direction; A first stroke gear fixed to the transfer roller to be rotated by the drive unit; And a second stroke gear installed at the other end of the support member so as to be periodically engaged with the first stroke gear relative to the first stroke gear. The support member is cleaned by periodically pushing each other during the relative rotation of the respective stroke gears. It is preferable to reciprocate a predetermined distance in the longitudinal direction of the roller.

In addition, it is preferable that a plurality of seating portions having inclined surfaces are formed at predetermined intervals in the support member so as to support the cutter so as to contact the cleaning roller at a predetermined acute angle.

In addition, the detachable means includes a drive motor; An inner frame having a first long hole which is supported such that the rotating shaft of the cleaning roller is rotated and the support member is movably coupled to the longitudinal direction; The second long hole is installed on the outside of the inner frame to be fixed to the transfer roller, the both sides of the support member is slid in the longitudinal direction, the second axis of the cleaning roller is coupled to the rotational axis to move in the perpendicular direction The formed outer frame; A second elastic member installed between the inner frame and the outer frame to elastically press the inner frame toward the transfer roller so that the cleaning roller is in close contact with the transfer roller and spaced apart from the cutter; And a cam gear installed on the outer frame so as to be rotated by the drive motor, the cam roller being spaced apart from the transfer roller and contacting the cutter by interfering with the rotation axis of the cleaning roller. .

Hereinafter, a transfer roller cleaning apparatus of a printing press according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2, 3, and 4, the transfer roller cleaning apparatus of the printing press according to the embodiment of the present invention, removes foreign substances on the surface of the transfer roller 17 to receive the toner image formed on the photosensitive belt (10) Cleaning roller 30 to be disposed, the heater 32 installed inside the cleaning roller 30, and the cleaning roller 30 disposed at predetermined intervals so as to be in contact with the cleaning roller 30 so as to scrape foreign substances from the surface of the cleaning roller 30. A plurality of cutters 42, a support member 44 installed side by side on the cleaning roller 30 to support the cutter 42, and the cutter 42 is supported so as to scrape foreign matter on the surface of the cleaning roller 30 A moving means for reciprocating the member 44 in the longitudinal direction of the cleaning roller 30 and a detachable means for contacting and separating the cleaning roller 30 from the transfer roller 17 and the cutter 42. do.

The cleaning roller 30 is installed to be in contact with and spaced apart from the transfer roller 17 and the cutter 42, the heater (so that foreign matter on the surface of the transfer roller 17 is removed by the difference in the surface energy) In contact with the transfer roller 17 in the state heated by 32, it is driven.

The cutter 42 is installed on the support member 44 at predetermined intervals such that one end thereof contacts the cleaning roller 30. Here, the support member 44 is preferably provided with a plurality of seating portions 44a having inclined surfaces at predetermined intervals in order to support the cutter 42 so as to contact the cleaning roller 30 at a predetermined acute angle.

The moving means is fixed to the drive unit 53, the first elastic member 53 for elastically pressing one end of the support member 44, and the cleaning roller 30 to be rotated by the drive unit 53 The first stroke gear 55 and the second stroke gear 57 are provided at the other end of the support member 44 so as to be periodically engaged with the first stroke gear 55 while being rotated relative to the first stroke gear 55.

The drive unit 53 is connected to the first drive motor 51 supported on the predetermined base 50 and the connecting gear 52 installed on the rotating shaft of the drive motor 51 to be rotated in engagement with the first stroke gear (55). Equipped. The first elastic member 53 is interposed between the inner frame 63 and the support member 44, which will be described later, so that each of the stroke gears 55 and 57 is engaged with the first stroke gear ( To 55).

The first stroke gear 55 is rotatably installed on the outer frame 65, which will be described later, and the second stroke gear 55 corresponds to the first stroke gear 55 so as to be relatively rotated. Is fixed to the other end of the Here, each of the stroke gears 55 and 57 has a plurality of gear portions 55a and 57a which are inclined in the circumferential direction from the cross sections facing each other and are engaged with each other. Therefore, when the first stroke gear 55 rotates, the support members 44 are reciprocated by a predetermined distance by pushing each other while the gears 55a and 57a periodically approach and shift while being engaged with each other.

The detachable means includes a second drive motor 61, an inner frame 63 rotatably supported by a rotating shaft of the cleaning roller 30, an outer frame 65 installed outside the inner frame 63, and And a second elastic member 67 provided between the inner frame 63 and the outer frame 65 and a cam gear 69 provided on the outer frame 65.

The second drive motor 61 is installed on the outer frame 65 to engage the cam gear 69 to rotate the cam gear 69. The inner frame 63 is installed to be movable relative to the outer frame 965. In addition, the inner frame 63 has a first long hole 63a to which the support member 44 is relatively movable in the B direction perpendicular to the A direction. The outer frame 65 is installed to be fixed to the transfer roller 17, the support member 44 is slidably supported in the A direction. In addition, the outer frame 65 is formed with a second long hole (65a) is coupled to the rotation axis of the cleaning roller 30 to move in the B direction. The second elastic member 67 elastically presses the inner frame 63 toward the transfer roller 17 such that the cleaning roller 30 is in close contact with the transfer roller 17 and spaced apart from the cutter 42. The cam gear 69 is installed to contact the rotating shaft of the cleaning roller 30. The cam gear 69 is rotated by the second drive motor 61 to interfere with the rotation axis of the cleaning roller 30 so that the cleaning roller 30 may be spaced apart from the transfer roller 17 and contact the cutter 42. Make sure

In addition, in order to rotate the cleaning roller 30 spaced apart from the transfer roller 17, a driven gear 73 is provided on the rotating shaft of the cleaning roller 30, and a third drive for rotating the driven gear 73. The motor 71 is provided to mesh with the driven gear 73.

The operation of the transfer roller cleaning apparatus of the printing press according to the embodiment of the present invention having the configuration as described above will be described.

While printing the toner image transferred from the photosensitive belt 10 to the transfer roller 17 on the printing paper P, as shown in FIG. 4, the cleaning roller 30 is brought into contact with the transfer roller 17, and the heater (32) is driven to heat the cleaning roller (30). Then, the cleaning roller 30 is in close contact with the transfer roller 17 by the elastic force of the second elastic member 67 and driven rotation by the friction force, foreign matter such as waste toner and dust particles on the surface of the transfer roller 17 It is transferred to the cleaning roller 30 by the difference in the surface energy. Then, the foreign matter transferred to the cleaning roller 30 is stacked and hardened without being transferred to the transfer roller 17 again. Therefore, it is possible to prevent the printing paper P from being contaminated by foreign matter on the surface of the transfer roller 17, and also to prevent the jam of the printing paper P.

On the other hand, when a long time passes, a large amount of foreign matter is accumulated on the surface of the cleaning roller 30, in order to remove the first drive the second drive motor 61 to operate the cam gear (69). Then, the cleaning roller 30 is pushed by the cam gear 69 and guided to the second long hole 65a and moved together with the inner frame 63 to be spaced apart from the transfer roller 17 and in contact with the cutter 42. Will be in the same state as In this state, the first drive motor 53 is driven to rotate the first stroke gear 55. Then, as the first stroke gear 55 and the second stroke gear 57 are rotated relative to each other, the gears 55a and 57a are released as shown in FIG. 5, and the second stroke gear is released. 57 is pushed by the first elastic member 53 and the meshing operation is repeated. Accordingly, the support member 44 is reciprocated a predetermined distance in the A direction, and foreign matter accumulated on the surface of the cleaning roller 30 is scraped off by the cutter 42 reciprocated with the support member 44. Then, by rotating the cleaning roller 30 by driving the third drive motor 71, it is possible to continuously scrape off the remaining portion of the foreign matter to completely remove the foreign matter on the surface of the cleaning roller 30 in a short time.

According to the transfer roller cleaning apparatus of the printing machine according to the present invention as described above, by cleaning the transfer roller by using a cleaning roller, it is possible to prevent the printing paper, such as glare and jam.

In addition, by removing the foreign matter on the surface of the cleaning roller by using a plurality of cutters reciprocating, it is possible to improve the cleaning function of the cleaning roller and to extend the life.

Claims (4)

A printing machine including a cleaning roller for removing foreign substances on the surface of the transfer roller while rotating in contact with the outer circumferential surface of the transfer roller for transferring the toner image formed on the photosensitive medium of the printing machine to the printing paper, and a heater installed inside the cleaning roller. In the transfer roller cleaning apparatus, A plurality of cutters disposed at predetermined intervals in contact with the surface of the cleaning roller so as to remove foreign substances attached to the cleaning roller; A support member installed in parallel with the cleaning roller to support the cutter; Moving means for reciprocating the support member in the longitudinal direction of the cleaning roller such that the cutter scrapes off foreign matter on the surface of the cleaning roller; And And a detachable means for contacting and separating the cleaning roller from the transfer roller and the cutter. The method of claim 1, wherein the moving means, A drive unit; A first elastic member elastically pressing one end of the support member in the longitudinal direction; A first stroke gear fixed to the transfer roller to be rotated by the drive unit; And And a second stroke gear installed at the other end of the support member so as to periodically engage with the first stroke gear relative to the first stroke gear. And the support member is reciprocated a predetermined distance in the longitudinal direction of the cleaning roller by periodically pushing each other during the relative rotation of the stroke gears. The method of claim 2, And a plurality of seating portions having inclined surfaces formed at predetermined intervals in the support member so as to support the cutter so as to contact the cleaning roller at a predetermined acute angle. The method according to any one of claims 1 to 3, wherein the detachable means, A drive motor; An inner frame in which the rotating shaft of the cleaning roller is rotated, the first frame having a first long hole coupled to the support member so as to be movable in a direction perpendicular to the length direction; The second long hole is installed on the outside of the inner frame to be fixed to the transfer roller, the both sides of the support member is slid in the longitudinal direction, the second axis of the cleaning roller is coupled to be movable in the right direction The formed outer frame; A second elastic member installed between the inner frame and the outer frame to elastically press the inner frame toward the transfer roller so that the cleaning roller is in close contact with the transfer roller and spaced apart from the cutter; A cam gear installed on the outer frame to be rotated by the driving motor, the cam roller being spaced apart from the transfer roller and contacting the cutter by interfering with a rotation axis of the cleaning roller according to the rotation. Transfer roller cleaning device of a printing press.