KR20230075763A - Finger for fusing device of copy machine and mounting structure of thereof - Google Patents

Abstract

The disclosed finger mounting structure for a copier fuser enables reuse of a fuser with a damaged finger support in a copier fuser having a heat roller case supporting a heat roller and a pressure roller. To this end, the present invention provides a plurality of fingers provided in the form of vertical bars in the shape of a hexahedron to separate the recording paper passing between the heat roller and the pressure roller from the heat roller; a support shaft for supporting the fingers so as to rotate in an up and down direction on one side of the discharge part of the heat roller case, which guides the discharge of the recording paper; It includes; and a plurality of fixing clips for fixing a plurality of fixing the support shaft to the side of the discharge unit.

Description

Finger mounting structure for copier fuser {FINGER FOR FUSING DEVICE OF COPY MACHINE AND MOUNTING STRUCTURE OF THEREOF}

The present invention (Disclosure) relates to a finger mounting structure for a fusing unit of a copier that separates a recording sheet passing through a fixing nip between a heat roller and a pressure roller from a heat roller.

Here, background art related to the present invention is provided, and they do not necessarily mean prior art (This section provides background information related to the present disclosure which is not necessarily prior art).

In general, a copier refers to a device that prints and processes original image data such as input documents, drawings, photos, etc. on a recording medium by having the same size or by enlarging or reducing the original image data.

The electrophotographic method, one of the copying methods of the above-mentioned copying machine, is a method used for laser printers, LPH printers, facsimiles, etc. To briefly explain the operation method of a copying machine using the electrophotographic method, the photosensitive drum of the copying machine is charged to the charging roller. charging process to form a uniform charge on the photosensitive drum, exposure process to form an electrostatic latent image by projecting light through a laser scanning unit onto the charged photosensitive drum, and developing process to develop the electrostatic latent image formed on the surface of the photosensitive drum with a developer , a transfer process in which the visible image formed on the photosensitive drum is transferred to the recording paper through a transfer roller, and a fixing process in which the developer transferred to the recording paper is heated and pressurized with predetermined heat and pressure to adhere to the recording paper.

Fuser (10 ) is shown in Figure 1.

Referring to FIG. 1 , a conventional fixing device 10 includes a heat roller 12, a pressure roller 14, and a plurality of fingers 20.

As anyone can know, a fixing nip (N) through which the recording paper P passes is formed between the heat roller 12 and the pressure roller 14, and the developer (toner) transferred to the recording paper P passes through the fixing nip. While passing through (N), it is fixed to the recording paper (P) by heat and pressure.

And the recording paper P passing through the fixing nip N is separated from the heat roller 12 by a plurality of fingers 20, guided to the upper side of the fingers 20, and then placed on the upper side of the fingers 20 is discharged to the outside of the fixing unit 10 through the discharging rollers 30.

Here, the fingers 20 are spaced apart at predetermined intervals along the longitudinal direction of the heat roller 12, and are positioned vertically on the discharge portion 18 of the heat roller case 16 rotatably supporting the heat roller 12. It is mounted to be able to pivot in any direction. At this time, a tension spring (not shown) is interposed between the heat roller case 16 and each finger 20 to elastically contact the front ends of the fingers 20 with the surface of the rotating heat roller 12 .

And, like the fingers 20, the discharge rollers 30 are spaced apart at predetermined intervals along the longitudinal direction of the heat roller 12, and are rotatable up and down on the side of the discharge part 18 of the heat roller case 16 are strongly supported

By the way, the above-mentioned conventional fuser 10, that is, the fuser used in Xerox's DC 236/286/336, DCII 2005/2055/3005, DCⅢ 2007/3007, DCIV 2060/3060/3065 models (10 ) had the following problems.

First, in the conventional fuser 10, since the temperature at both ends of the heat roller 12 is higher than that of other parts, when used for a long time, the surface of the both ends of the heat roller 12 irregularly swells and deforms. There was a problem that the front end side of the fingers 20 in contact with the surface of the roller 12 fluctuated in the vertical direction, and as a result, the recording paper P was caught between the heat roller 12 and the pink 20. .

Second, in the conventional fuser 10, since the heat roller case 16 is hardened by the heat of the heat roller 12, the finger 20 support portion formed on the heat roller case 16 when the finger 20 is exchanged for maintenance There is a problem that is easily damaged, and due to this problem, there has been an economic burden of having to replace the entire fixing device 10.

Fifthly, since a developer (toner) is deposited on the fingers 20 of the conventional fixing unit 10 and coated with a paint so that the fingers 20 are not adhered, manufacturing of the fingers 20 is cumbersome and manufacturing costs increase.

Korean Registered Patent Publication No. 10-0779643. Korean Patent Publication No. 10-1998-0029959. Korean Registered Patent Publication No. 10-1378041. Korean Patent Publication No. 10-2007-0071460.

The present invention (Disclosure) is a fusing device used in xerox copier DC 236/286/336, DCII 2005/2055/3005, DCⅢ 2007/3007, DCIV 2060/3060/3065 models with damaged finger supports It is an object of the present invention to provide a finger mounting structure for a copier fixer that enables reuse.

In addition, the problem to be solved by the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. It could be.

This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, according to one aspect among several aspects of the present invention, a fusing unit having a damaged finger support portion in a copier fusing machine having a heat roller case supporting a heat roller and a pressure roller is provided. A reusable finger mounting structure for a copier fixer, the finger mounting structure comprising: a plurality of fingers provided in a hexahedron-shaped vertical bar form to separate a recording sheet passing between a heat roller and a pressure roller from the heat roller; a support shaft for supporting the fingers so as to rotate in an up and down direction on one side of the discharge part of the heat roller case, which guides the discharge of the recording paper; And a plurality of fixing clips for fixing a plurality of fixing the support shaft to the side of the discharge unit; may include.

In the finger mounting structure for a copier fixer according to one aspect of the present invention, the finger includes: an upper surface; lower face; a side surface connecting both sides of the upper surface and the lower surface; a front surface connecting one end of the upper surface and the lower surface; and a rear surface connecting one end of the upper surface and the lower surface; wherein the upper surface is formed as a curved surface curved from the rear surface side to the front side for smooth discharge of the recording paper guided along the front surface, and the lower surface is a heat roller It is formed as an inclined surface that slopes upward from the front to the rear to minimize contact with the surface, and a tip is formed at the corner where the lower surface and the front connect, and the hinge hole into which the support shaft is inserted passes through the transverse direction at the upper side of the side surfaces. can be formed to

In the finger mounting structure for a copier fixer according to one aspect of the present invention, a plurality of guide rollers are rotatably mounted in the vertical direction on the front surface, and a settling groove in which a part of the guide rollers is accommodated is provided on the front surface in the longitudinal direction of the front surface. It is formed spaced apart along, and both sides of each settling groove may be formed with a rotating groove into which the rotating shaft of the guide roller is rotatably fitted.

In the finger mounting structure for a copier fixer according to one aspect of the present invention, between the back surface adjacent to the upper side of the hinge hole and one side surface of the discharge unit, a compression coil enabling the tip to remain in contact with the surface of the heat roller The spring is interposed, but a fitting protrusion into which one end of the compression coil spring is fitted is formed on the rear surface, and the other end of the compression coil spring may be supported by abutting against one side of the discharge unit.

In the finger mounting structure for a copier fixer according to one aspect of the present invention, the support shaft has a circular cross section and extends horizontally along the longitudinal direction of the heat roller, and fingers are inserted into the support shaft through a hinge hole, The support shaft into which the fingers are inserted may be supported by being inserted into the discharge roller support groove of the discharge roller support bracket formed on one side of the discharge unit.

In the finger mounting structure for a copier fixer according to one aspect of the present invention, the fixing clip is formed in a "⊃" shape with an opening formed on one side to accommodate the support shaft inwardly, and the upper and lower sides of the opening have Locking protrusions are formed to fix the support shaft supported by the discharge roller support bracket to the discharge unit, and the locking protrusions extend from one side of the discharge unit to the other side of the discharge unit, and are discharged through incisions and through-holes formed to correspond vertically. It can be straddled on the other side of the part.

According to the present invention, since a plurality of guide rollers are mounted on the front surface of the finger, it is possible to provide an effect of enabling the recording paper to be easily discharged to the outside of the fixing unit.

According to the present invention, since a plurality of guide rollers are rotatably mounted on the front surface of the finger, it is possible to provide an effect of preventing the developer (toner) from being stacked and adhered even without coating a paint unlike the conventional finger. there will be

According to the present invention, since a finger can be mounted on a fixing device having a damaged finger support portion, the expensive fixing device can be reused, thereby reducing the user's economic burden.

1 is a diagram schematically showing a fuser used in models DC 236/286/336, DCII 2005/2055/3005, DCIII 2007/3007, and DCIV 2060/3060/3065 copiers of a conventional xerox;
2 is a perspective view showing a finger mounting structure for a copier fixer according to the present invention;
Figure 3 is an enlarged perspective view of the finger shown in Figure 1;
Figure 4 is an exploded perspective view of a finger showing a state in which the guide roller shown in Figure 3 is separated.
5 is a view showing a coupling relationship between a support shaft and a fixing clip shown in FIG. 1 and a heat roller case;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment in which a finger mounting structure for a fusing machine for a copier according to the present invention is implemented will be described in detail with reference to the drawings.

However, the essential (intrinsic) technical idea of the present invention cannot be said to be limited by the embodiments described below, and based on the essential (intrinsic) technical idea of the present invention, a person skilled in the art below It is revealed that the embodiments described in include the range that can be easily proposed as a method of substitution or change.

In addition, since the terms used below are selected for convenience of description, in grasping the essential (intrinsic) technical idea of the present invention, they are not limited to the dictionary meaning and are appropriately interpreted in a meaning consistent with the technical idea of the present invention. It should be.

2 to 5 are views showing a finger mounting structure for a copier fixer according to the present invention.

Referring to FIGS. 2 to 5, the present invention relates to Xerox's copier DC 236/286/336, DCⅡ 2005/2055/3005, DCⅢ 2007/3007, DCIV 2060/3060/3065 with damaged finger support. The fixture 10 used in the model can be reused, and the present invention includes a plurality of fingers 100, a support shaft 130, and a plurality of fixing clips 140.

First, the finger 100 according to the present invention is a fuser (10 It performs the same function as the finger 20 (see FIG. 1) mounted on the ).

As shown, the finger 100 is provided in a substantially hexahedron-shaped vertical bar shape having a predetermined width and thickness.

That is, the finger 100 has an upper surface 102 and a lower surface 104, side surfaces 106 connecting both sides of the upper surface 102 and lower surface 104, and an upper surface 102 and a lower surface ( It includes a front surface 108 and a rear surface 110 connecting one end and the other end of 104.

At this time, the upper surface 102 of the finger 100 is separated from the heat roller 12 and is guided along the front surface 108 of the finger 100 to smoothly discharge the recording paper P from the rear surface 110 side. It is formed with a curved surface that is gently curved towards the front surface 108.

In addition, the lower surface 104 of the finger 100 in contact with the surface of the heat roller 12 is an inclined surface inclined upward from the front surface 108 to the rear surface 110 to minimize contact with the surface of the heat roller 12. is formed by

In other words, the lower surface 104 of the finger 100 extends at an upward slope toward the rear surface 110 of the finger 100 from the corner portion connected to the front surface 108 of the finger 100, and thus the finger 100 A sharp tip is formed at the corner where the lower surface 104 and the front surface 108 of the finger 100 connect.

Here, the sharp tip comes into contact with the surface of the heat roller 12 to separate the recording container P from the heat roller 12 .

On the other hand, a hinge hole 112 penetrating the finger 100 in the transverse direction is formed on the upper side of the side surfaces 106 of the finger 100, and the finger 100 can be turned up and down in the hinge hole 112 The support shaft 130 for supporting the heat roller case 16 of the fixing unit 10 is inserted into the discharge part 18 side.

And the upper side of the rear surface of the finger 100 facing the one side of the discharge part 18 of the heat roller case 16, that is, the rear surface 110 of the finger 100 adjacent to the upper side of the hinge hole 112 A fitting protrusion 114 into which one end side of the compression coil spring 116 is fitted is formed.

At this time, the other end of the compression coil spring 116, one end of which is fitted into the fitting protrusion 114, is supported by abutting against one side of the discharge portion 18 of the heat roller case 16. The compression coil spring 116 interposed between the discharge part 18 and the rear surface 110 of the finger 100 is a corner portion where the lower surface 104 of the finger 100 and the front surface 108 of the finger 100 are connected. The sharp tip formed on the surface of the heat roller 12 can always be maintained in contact with the surface.

And, as shown, a plurality of guide rollers 122 are rotatably mounted on the front surface 108 of the finger 100 along the longitudinal direction of the front surface 108 of the finger 100 so as not to interfere with each other.

To this end, on the front surface 108 of the finger 100, recessed grooves 118 in which a portion of the guide rollers 122 are accommodated are formed spaced apart along the longitudinal direction of the front surface 108, and each of the recessed grooves 118 Rotation grooves 120 are formed on both sides of the guide roller 122 into which the rotation shaft 124 is rotatably fitted.

The guide rollers 122 rotatably mounted on the front surface 108 of the finger 100 in the up and down direction contact the recording paper P passing through the fixing nip N with the front surface 108 of the finger 100. It not only allows the recording paper P to be discharged smoothly while minimizing the , but also prevents the developer (toner) from being deposited and adhered to the front surface 108 .

As described above, the support shaft 130 supports the fingers 100 on the ejection part 18 side of the heat roller case 16 of the fixing unit 10 so that the fingers 100 can pivot in the vertical direction.

As shown, the support shaft 130 has a circular cross-section and extends horizontally along the longitudinal direction of the heat roller 12, and one or more fingers 100 are pivotably inserted into the support shaft 130.

That is, by inserting the support shaft 130 into the hinge hole 112 formed in the finger 100, the fingers 100 are fitted to the support shaft 130 so as to pivot in the vertical direction.

Meanwhile, the support shaft 130 into which the fingers 100 are inserted is the discharge roller support bracket 32 formed on one side of the discharge portion 18 of the heat roller case 16, that is, the discharge roller 30 (see FIG. 1). It is supported by being inserted into the discharge roller support bracket 32 that rotatably supports the.

At this time, the support shaft 130 is inserted into the discharge roller support bracket 32 under the state in which the discharge roller 30 is separated, and the support shaft 130 rotates the discharge roller to support the discharge roller 30. It is fitted onto the discharge roller support groove 34 formed in the support bracket 32.

The fixing clips 140 fix the support shaft 130 into which the fingers 100 are inserted to the discharge part 18 side of the heat roller case 16 .

As shown, the fixing clips 140 are formed to have an approximate “⊃” shape with an opening 142 formed on one side when viewed from the side, but the inside of the fixing clip 140 interferes with the fingers 100 The support shaft 130 is accommodated through the opening 142 so as not to happen.

At this time, protrusions 144a and 144b for fixing the fixing clip 140 to the discharge part 18 of the heat roller case 16 are formed on the upper and lower sides of the opening 142, respectively. The protrusion 144a formed on the upper side of the opening protrudes toward the lower side of the opening 142, and the protrusion 144b formed on the lower side of the opening 142 protrudes toward the upper side of the opening 142.

The protrusions 144a and 144b thus formed are formed to extend from one side of the discharge part 18 of the heat roller case 16 to the other side of the discharge part 18, and have cut grooves 18a and penetrating grooves 18a formed to correspond vertically. It spans over the other side of the discharge part 18 through the hole 18b, that is, on the other side of the cutout 18a and the through hole 18b, and as a result, the fixing clip 140 is of the heat roller case 16. It is fixed to the discharge part 18, and the support shaft 130 is safely supported without being separated from the discharge roller support bracket 32 by the fixing clip 140 fixed to the discharge part 18 of the heat roller case 16. do.

In the present invention formed as described above, since the plurality of guide rollers 122 are mounted on the front surface of the finger 100, the recording paper P can be easily discharged to the outside of the fixing unit.

In the present invention, since the plurality of guide rollers 122 are rotatably mounted on the front surface of the finger 100, it is possible to prevent the developer (toner) from being deposited and adhered even without coating a paint like the conventional finger 100. make it possible

According to the present invention, since the finger 100 can be mounted on the fixing device 10 having a damaged finger support, the expensive fixing device 10 can be reused, thereby reducing the user's economic burden.

Claims (6)

A finger mounting structure for a fusing machine for a copier having a heat roller case supporting a heat roller and a pressure roller, wherein the fusing machine having a damaged finger support part can be reused, comprising:
The finger mounting structure,
a plurality of fingers provided in the form of vertical bars in the shape of a hexahedron to separate the recording paper passing between the heat roller and the pressure roller from the heat roller;
a support shaft for supporting the fingers so as to pivot in an up and down direction on one side of the ejection part of the heat roller case, which guides the ejection of the recording paper; and
A finger mounting structure for a copier fixer comprising: a plurality of fixing clips fixing the support shaft to the ejection part.
The method of claim 1,
The finger,
upper surface;
lower face;
a side surface connecting both sides of the upper surface and the lower surface;
a front surface connecting one end of the upper surface and the lower surface; and
Including; a rear surface connecting one end of the upper surface and the lower surface,
The upper surface is formed as a curved surface curved from the rear surface side to the front side for smooth discharge of the recording paper guided along the front surface,
The lower surface is formed as an inclined surface inclined upward from the front surface toward the rear surface to minimize contact with the surface of the heat roller, and a tip is formed at a corner portion where the lower surface and the front surface are connected.
A finger mounting structure for a copier fixer, wherein a hinge hole into which the support shaft is inserted is formed to pass through the upper side of the side surfaces in a transverse direction.
The method of claim 2,
A plurality of guide rollers are rotatably mounted on the front surface in the vertical direction,
On the front surface, a settling groove in which a portion of the guide rollers are accommodated is formed spaced apart along the longitudinal direction of the front surface,
A finger mounting structure for a fusing machine for a copying machine, wherein rotational grooves into which rotational shafts of the guide rollers are rotatably fitted are formed on both sides of each of the settling grooves.
The method of claim 2,
A compression coil spring is interposed between the rear surface adjacent to the upper side of the hinge hole and one side surface of the discharge part to keep the tip in contact with the surface of the heat roller.
A fitting protrusion into which one end of the compression coil spring is fitted is formed on the rear surface, and the other end of the compression coil spring is supported by abutting against one side surface of the discharge unit.
The method of claim 2,
The support shaft has a circular cross section and extends horizontally along the longitudinal direction of the heat roller,
The fingers are fitted to the support shaft via the hinge hole,
The support shaft into which the fingers are inserted is inserted into and supported in a discharge roller support groove of a discharge roller support bracket formed on one side of the discharge unit.
The method of claim 5,
The fixing clip is formed in a "⊃" shape with an opening formed on one side to accommodate the support shaft inwardly, and the support shaft supported by the discharge roller support bracket is attached to the upper and lower sides of the opening to the discharge portion. Stabilizing protrusions are formed,
The protrusions are formed to extend from one side of the discharge unit to the other side of the discharge unit, and span across the other side of the discharge unit through cutout grooves and through-holes formed to correspond vertically.

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