KR102668837B1 - 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 in which a finger support portion is damaged in a copier fuser having a heat roller case supporting a heat roller and a pressure roller. To this end, the present invention includes a plurality of fingers provided in the form of a hexahedral vertical bar that separates the recording paper passing between the heat roller and the pressure roller from the heat roller; A support shaft that supports fingers so that they can rotate in the up and down direction on one side of the discharge portion of the heat roller case that guides the discharge of recording paper; And a plurality of fixing clips that secure the support shaft to the discharge unit side.

Description

FINGER FOR FUSING DEVICE OF COPY MACHINE AND MOUNTING STRUCTURE OF THEREOF}

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

Here, background information related to the present invention is provided, and this does 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 making it the same size or enlarging or reducing it.

The electrophotographic method, one of the copying methods of the above-mentioned copier, is used in laser printers, LPH printers, facsimile machines, etc. To briefly explain how a copier using the electrophotographic method works, the photosensitive drum of the copier is charged to the charging roller. A charging process to form a uniform charge on the photosensitive drum, an exposure process to form an electrostatic latent image by projecting light onto the charged photosensitive drum through a laser scanning unit, and a development 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 fixation process in which the developer transferred to the recording paper is heated and pressed with a predetermined heat and pressure to fuse it on the recording paper.

Among the above-described processes, a fuser (10 ) is shown in Figure 1.

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

As anyone can see, 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) is formed in the fixing nip. As it passes 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). It is discharged to the outside of the fixer 10 through the discharge rollers 30.

Here, the fingers 20 are spaced apart at predetermined intervals along the longitudinal direction of the heat roller 12, and are positioned up and down on the discharge portion 18 of the heat roller case 16 that rotatably supports the heat roller 12. It is equipped with the ability 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 tip 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 can rotate in the vertical direction on the discharge portion 18 of the heat roller case 16. It is strongly supported.

However, the conventional fuser (10) described above, that is, the fuser (10) used in xerox copier DC 236/286/336, DCⅡ 2005/2055/3005, DCⅢ 2007/3007, and DCⅣ 2060/3060/3065 models ) had the following problems.

First, in the conventional fixer 10, the temperature at both ends of the heat roller 12 is higher than other parts, so when used for a long time, the surface at both ends of the heat roller 12 swells irregularly and deforms, resulting in heat roller 12. There was a problem in that the tip sides of the fingers 20 in contact with the surface of the roller 12 oscillated in the up and down direction, and as a result, there was a problem in which the recording paper P was caught between the heat roller 12 and the fingers 20. .

Second, in the conventional fixer 10, the heat roller case 16 is hardened by the heat of the heat roller 12, so when the finger 20 is exchanged for maintenance, the support portion of the finger 20 formed on the heat roller case 16 There was a problem that it was easily damaged, and because of this problem, there was an economic burden of having to replace the entire fixer 10.

Third, since the finger 20 of the conventional fuser 10 is coated with paint to prevent the developer (toner) from being laminated and fixed, there is a problem in that manufacturing the finger 20 is not only cumbersome but also increases manufacturing cost.

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

The present invention (Disclosure) is a fuser used in xerox copier DC 236/286/336, DCⅡ 2005/2055/3005, DCⅢ 2007/3007, and DCⅣ 2060/3060/3065 models with damaged finger support portions. One purpose is to provide a finger mounting structure for a copier fuser that allows 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 can be clearly understood by those skilled in the art from the description below. It could be.

Here, a general summary of the present invention is provided, and this should not be construed as limiting the scope of the present invention (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 problem, according to one aspect among several aspects describing the present invention, a fuser in which a finger support portion is damaged in a copier fuser having a heat roller case supporting a heat roller and a pressure roller is provided. A finger mounting structure for a reusable copier fuser, the finger mounting structure comprising: a plurality of fingers provided in the form of a hexahedral vertical bar that separates the recording paper passing between the heat roller and the pressure roller from the heat roller; A support shaft that supports fingers so that they can rotate in the up and down direction on one side of the discharge portion of the heat roller case that guides the discharge of recording paper; And it may include a plurality of fixing clips that secure the support shaft to the discharge unit side.

In the finger mounting structure for a copier fuser according to an aspect of the present invention, the finger includes: an upper surface; lower surface; A side 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 back 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 back 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 with a slope that slopes upward from the front to the back to minimize contact with the surface, and a tip is formed at the corner where the lower surface and the front connect, and a hinge hole into which the support shaft is inserted passes through the upper side of the sides in the transverse direction. can be formed.

In the finger mounting structure for a copier fuser according to an aspect of the present invention, a plurality of guide rollers are mounted on the front to be rotatable in the up and down directions, and a depression groove in which a portion of the guide rollers is accommodated is formed on the front in the longitudinal direction of the front. They are spaced apart from each other, and rotation grooves into which the rotation shaft of the guide roller is rotatably inserted may be formed on both sides of each depression groove.

In the finger mounting structure for a copier fixer according to an aspect of the present invention, there is a compression coil between the rear surface adjacent to the upper side of the hinge hole and one side of the discharge part to maintain the tip in contact with the surface of the heat roller. A spring is interposed, and a fitting protrusion into which one end of the compression coil spring is inserted is formed on the rear surface, and the other end of the compression coil spring may be supported by contacting one side of the discharge portion.

In the finger mounting structure for a copier fixer according to an 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 hinge holes, 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 portion.

In the finger mounting structure for a copier fixer according to an 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 inside, and the upper and lower sides of the opening are provided. Locking protrusions are formed to secure the support shaft supported on the discharge roller support bracket to the discharge section. The locking protrusions are formed to extend from one side of the discharge section to the other side of the discharge section, and are discharged through cut grooves and through holes formed correspondingly at the top and bottom. It can be draped over the other side of wealth.

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

According to the present invention, since a plurality of guide rollers are rotatably mounted on the front of the finger, it is possible to provide the effect of preventing the developer (toner) from stacking and sticking even without coating paint like a conventional finger. There will be.

According to the present invention, since a finger can be mounted on a fuser whose finger support portion is damaged, an expensive fuser can be reused, thereby providing the effect of reducing the economic burden on the user.

Figure 1 is a diagram schematically showing a fuser used in conventional Xerox copier DC 236/286/336, DCⅡ 2005/2055/3005, DCⅢ 2007/3007, and DCⅣ 2060/3060/3065 models.
Figure 2 is a perspective view showing a finger mounting structure for a copier fuser 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 the finger showing the guide roller shown in Figure 3 in a separated state.
Figure 5 is a diagram showing the connection relationship between the support shaft and fixing clip shown in Figure 1 and the heat roller case.

Hereinafter, an embodiment of the finger mounting structure for a copier fixer according to the present invention will be described in detail with reference to the drawings.

However, the essential technical idea of the present invention cannot be said to be limited to the embodiments described below, and based on the essential technical idea of the present invention, it cannot be said that the possible embodiments are limited by the embodiments described below. It is disclosed that the embodiment described in covers the scope that can be easily proposed by way of replacement or change.

In addition, the terms used below are selected for convenience of explanation, so in understanding the essential technical idea of the present invention, they are not limited to dictionary meanings and are appropriately interpreted as meanings that correspond to the technical idea of the present invention. It should be.

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

Referring to Figures 2 to 5, the present invention is a xerox copier DC 236/286/336, DCⅡ 2005/2055/3005, DCⅢ 2007/3007, DCⅣ 2060/3060/3065 with damaged finger support portions. In order to reuse the fixer 10 used in the model, 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) used in xerox copier DC 236/286/336, DCⅡ 2005/2055/3005, DCⅢ 2007/3007, and DCⅣ 2060/3060/3065 models. ) performs the same function as the finger 20 (see FIG. 1) mounted on the

As shown, the finger 100 is provided in the form of a vertical bar of approximately hexahedral shape with 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 a lower surface 104, and an upper surface 102 and a lower surface ( It includes a front 108 and a back 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 separated from the rear 110 side to smoothly discharge the recording paper P guided along the front 108 of the finger 100. It is formed as a gently curved surface toward the front side (108).

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

In other words, the lower surface 104 of the finger 100 extends inclined upward from the edge connected to the front 108 of the finger 100 toward the rear 110 of the finger 100, which causes the A sharp tip is formed at a corner where the lower surface 104 and the front surface 108 of the finger 100 are connected.

Here, the sharp tip contacts the surface of the heat roller 12 to separate the recording container P from the heat roller 12.

Meanwhile, a hinge hole 112 is formed on the upper side of the side surfaces 106 of the finger 100, penetrating the finger 100 laterally, and the hinge hole 112 allows the finger 100 to rotate in the up and down direction. A support shaft 130 is fitted to the discharge portion 18 of the heat roller case 16 of the fuser 10.

And on the upper back side of the finger 100 facing one side of the discharge portion 18 of the heat roller case 16, that is, on the back side 110 of the finger 100 adjacent to the upper side of the hinge hole 112. An insertion protrusion 114 is formed into which one end of the compression coil spring 116 is inserted.

At this time, the other end of the compression coil spring 116, one end of which is inserted into the fitting protrusion 114, is supported in contact with one side of the discharge portion 18 of the heat roller case 16. The compression coil spring 116 interposed between the discharge portion 18 and the back 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 can always be maintained in contact with the surface of the heat roller 12.

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

For this purpose, sinking grooves 118 in which portions of the guide rollers 122 are accommodated are formed on the front surface 108 of the finger 100 to be spaced apart along the longitudinal direction of the front surface 108, and each sinking groove 118 Rotation grooves 120 are formed on both sides into which the rotation shaft 124 of the guide roller 122 is rotatably inserted.

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

As described above, the support shaft 130 supports the fingers 100 on the discharge portion 18 side of the heat roller case 16 of the fixer 10 so that they can rotate in the up and down directions.

The support shaft 130 has a circular cross-section as shown and extends horizontally along the longitudinal direction of the heat roller 12, and one or more fingers 100 are rotatably fitted to 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 rotatably inserted into the support shaft 130 in the up and down directions.

Meanwhile, the support shaft 130 on 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, which rotatably supports the.

At this time, the support shaft 130 is inserted into the discharge roller support bracket 32 with the discharge roller 30 separated. The support shaft 130 is a discharge roller so as to rotatably support the discharge roller 30. It is inserted into the discharge roller support groove 34 formed on the support bracket 32.

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

As shown, the fixing clips 140 are formed to have an approximately "⊃" 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 received through the opening 142 so as not to be damaged.

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

The locking protrusions 144a and 144b formed in this way are formed to extend from one side of the discharge portion 18 of the heat roller case 16 to the other side of the discharge portion 18, and have cut grooves 18a and penetrations formed correspondingly up and down. It hangs over the other side of the discharge portion 18 through the hole 18b, that is, on the other side of the cut groove 18a and the through hole 18b, and as a result, the fixing clip 140 is attached to 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 in this way, a plurality of guide rollers 122 are mounted on the front of the finger 100, so that the recording paper P can be easily discharged to the outside of the fuser.

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

According to the present invention, the finger 100 can be mounted on the fuser 10 in which the finger support portion is damaged, so the expensive fuser 10 can be reused, thereby reducing the economic burden on the user.

Claims (6)

A finger mounting structure for a copier fuser that allows reuse of a fuser with a damaged finger support portion in a copier fuser having a heat roller case supporting a heat roller and a pressure roller,
The finger mounting structure is,
a plurality of fingers provided in the form of a hexahedral vertical bar to separate the recording paper passing between the heat roller and the pressure roller from the heat roller;
a support shaft on one side of the discharge portion of the heat roller case that guides the discharge of the recording paper and supporting the fingers so that they can pivot in an up and down direction; and
A finger mounting structure for a copier fixer including a plurality of fixing clips that secure the support shaft to the discharge unit side.
In claim 1,
The fingers are,
upper surface;
lower surface;
A side 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
Includes a back surface connecting one end of the upper surface and the lower surface,
The upper surface is formed as a curved surface curved from the back side to the front side for smooth discharge of the recording paper guided along the front side,
The lower surface is formed as a slope sloping upward from the front side to the rear side to minimize contact with the surface of the heat roller, and a tip is formed at an edge connecting the lower surface and the front surface,
A finger mounting structure for a copier fixer in which a hinge hole into which the support shaft is inserted is formed to penetrate the upper side of the side surfaces in the transverse direction.
In claim 2,
A plurality of guide rollers are mounted on the front surface to be rotatable in the up and down directions,
On the front side, sinking grooves in which some of the guide rollers are accommodated are formed spaced apart along the longitudinal direction of the front side,
A finger mounting structure for a copier fixer in which rotation grooves are formed on both sides of each of the sinking grooves into which the rotation axis of the guide roller is rotatably inserted.
In claim 2,
A compression coil spring is interposed between the rear surface adjacent to the upper side of the hinge hole and one side of the discharge portion to maintain the tip portion in contact with the surface of the heat roller,
A finger mounting structure for a copier fixer in which an insertion protrusion into which one end of the compression coil spring is inserted is formed on the rear surface, and the other end of the compression coil spring is supported by contacting one side of the discharge unit.
In claim 2,
The support shaft has a circular cross-section and extends horizontally along the longitudinal direction of the heat roller,
The fingers are inserted into the support shaft via the hinge hole,
A finger mounting structure for a copier fixer wherein the support shaft into which the fingers are inserted is supported by being inserted into a discharge roller support groove of a discharge roller support bracket formed on one side of the discharge unit.
In claim 5,
The fixing clip is formed in a "⊃" shape with an opening formed on one side to accommodate the support shaft inside, and the support shaft supported on the discharge roller support bracket is provided on the upper and lower sides of the opening to the discharge unit. Stumbling protrusions are formed to secure the
The locking protrusions are formed to extend from one side of the discharge unit to the other side of the discharge unit and span the other side of the discharge unit through cut grooves and through holes formed in corresponding upper and lower directions.

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