CN102279549A - Photographic fixing roller, fixing device and image forming device - Google Patents
Photographic fixing roller, fixing device and image forming device Download PDFInfo
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- CN102279549A CN102279549A CN2011101449175A CN201110144917A CN102279549A CN 102279549 A CN102279549 A CN 102279549A CN 2011101449175 A CN2011101449175 A CN 2011101449175A CN 201110144917 A CN201110144917 A CN 201110144917A CN 102279549 A CN102279549 A CN 102279549A
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Abstract
The invention provides a photographic fixing roller, a fixing device and an image forming device, which can keep the uniformity of a clamping part while preventing a wheel belt from deteriorating and deviating. A flexible layer (12) of the photographic fixing roller (1) is provided with multiple projections (13) continuously extending from the axial center O of the flexible layer to end parts L and R and symmetrical to the center O. Each projection (13) comprises a right conical surface S with a higher end adjacent to the center O and a lower end adjacent to the ends L and R. Namely, in the photographic fixing roller, the multiple right conical surfaces S are continuously arranged from the center O to the ends L and R with the center O as the symmetrical point. The projections (13) are defined in a way that the sum of the right conical step difference Ht in each right conical surface S is a necessary predetermined deviation preventing value for preventing heating wheel belts from deviating.
Description
Technical field
The present invention relates to adopt in the duplicating machine, printer, facsimile recorder of electrofax mode, unfixed toner image is carried out the fixing roller of photographic fixing and had the fixing device of this fixing roller, and the image processing system with this fixing device.
Background technology
Adopt in the image processing system of electrofax mode the fixing device that being provided with does not also have photographic fixing after being developed on the recording medium to sheet such as transfer paper, OHP toner image heats at duplicating machine, printer, facsimile recorder etc.A kind of photographic fixing mode that is adopted in this fixing device is a heated wheel band photographic fixing mode.In this heated wheel band photographic fixing mode, be will by heater meanses such as radiator come the heated wheel band of heated ring-type can open rotationally frame fixing roller and with respect to this fixing roller with interval by the support roller of configured in parallel on, and make backer roll be crimped onto in this fixing roller after betwixt this heated wheel strap clamp to form clamping part, then, recording medium is heated by this clamping part and this recording medium that pressurizes after unfixed toner image is carried out photographic fixing.
In the fixing device that adopts this heated wheel band photographic fixing mode, for example exist because heated wheel band or the formed precision of fixing roller or their assembly precision etc., and make heated wheel band direction of principal axis (in the end of fixing roller) lining to fixing roller when rotation is mobile move and the inclined to one side phenomenon of leaning on of generation, the multiple technologies scheme has been proposed in order to address this problem.
For example, technology below in patent documentation 1, disclosing: in the Width end of the heated wheel band of fixing device, be provided with the protruding railway line limiting part that leans on partially within it in the face side, simultaneously, be provided with near the end face of fixing roller in its outer peripheral face reeded discoideus partially by stoping parts to mesh by limiting part partially with this.Then, limit heated wheel band moving in Width by the inclined to one side of limiting part and fixing roller by being meshing with each other of prevention parts by the inclined to one side of heated wheel band, thereby prevent the inclined to one side of heated wheel band by phenomenon.
In addition, technology below in patent documentation 2, disclosing: as shown in figure 10, in fixing roller 801 with fixing device, by being divided among three parts along direction of principal axis, it is uniform drum that near the axial center part 811 forms external diameter, and with near the part its two side's the end 812,813 form the center be symmetrical in the direction of principal axis separately, and has central side height (external diameter that is fixing roller is big), the cone shape (truncated cone shape) of the normal cone face of end side low (external diameter that is fixing roller is little), near the external diameter that fixing roller is all formed the center is big, and along with positive crown (crown) shape that diminishes gradually near its external diameter of two ends.
In this fixing roller, adopted positive crown amount C as the desired value of representing this shape.In this application, the positive crown amount C in the fixing roller of positive crown shape represents the difference between the mean value of external diameter at the external diameter at the center in the direction of principal axis of fixing roller and two ends,, has represented the degree that give prominence to respect to two ends at the center of fixing roller that is, is represented by following formula:
C＝a-(b+c)/2
Wherein, a represents the external diameter (being maximum outside diameter) at the center in the direction of principal axis of fixing roller, and b and c represent the external diameter at two ends.
Consider the bending of the fixing roller when backer roll is crimped etc., the value of this positive crown amount C is set so that the pressure to the recording medium on the sheet material is equalization in the clamping part.
As mentioned above, in being provided with, be the shape that exists with ... normal cone face S by its shape positive as can be known crown amount C with respect to the fixing roller of a pair of normal cone face of center for symmetry.Then, in this fixing roller, shown in Figure 11 (a) and (b), when the heated wheel band 902 of fixing roller 901 in being wound on its outer peripheral face rotates, the characteristic of utilizing this heated wheel band 902 to move in perpendicular to the direction of the bus G of normal cone face S just can produce a power F who moves towards center O with respect to this heated wheel band 902.In addition, in normal cone face S, it is big more with respect to the angle that the direction of principal axis P of fixing roller forms, and promptly the normal cone ladder residual quantity Ht among the normal cone face S is big more, the helixangle of heated wheel band, and promptly above-mentioned power F is just big more.In this application, normal cone ladder residual quantity Ht represents with the maximum outside diameter of the fixing roller among the normal cone face S and the difference of minimum outer diameter, is represented by following formula:
Ht＝d-e
Wherein, d is the external diameter (being maximum outside diameter) of the fixing roller in the end of normal cone face S, and e is the external diameter (being minimum outer diameter) of the fixing roller in the other end of normal cone face S.Then, in this fixing roller, for prevent the heated wheel band partially by phenomenon, predetermined by normal cone ladder residual quantity Ht is set at as necessary normal cone ladder residual quantity partially by the value of preventing Hs, just can prevent to lean on partially phenomenon effectively.
Yet, in the fixing device shown in the patent documentation 1, because be by partially by stoping parts to stop to want the heated wheel band (promptly partially by limiting part) that in the end of fixing roller, moves, will have heated wheel band and inclined to one side by making the problem of heated wheel band deterioration after the sliding contact of prevention parts.In addition, when the deterioration of this heated wheel band develops, or the power that moves in the end of fixing roller of heated wheel band is when big, it is stranded partially by the situation on the prevention parts that the heated wheel band might take place, phenomenons such as buckling of heated wheel band will take place thus, thereby cause the problems such as breakage of this heated wheel band.
To this, in the fixing roller shown in the patent documentation 2, because as patent documentation 1, do not stop the heated wheel band, so with regard to deterioration that above-mentioned heated wheel band can not take place and problem such as buckle.Yet, in the fixing roller of existing positive crown shape with this a pair of normal cone face S, normal cone ladder residual quantity Ht need be set at above-mentioned partially by the value of preventing Hs, should be partially lean on phenomenon partially for what prevent the heated wheel band effectively by the value of preventing Hs, it is bigger value to a certain extent, when being arranged on a pair of normal cone face S in this fixing roller and guaranteeing this partially by the value of preventing Hs, the external diameter a of the center O of fixing roller 901 and the external diameter b at two ends, difference between the c enlarges, thus cause being formed on fixing roller 901 and the backer roll that is crimped between the width of clamping part or the uneven problem of pressure.
In addition, for this problem, shown in patent documentation 3, little by near fixing roller is formed the center external diameter, and the anti-crown shape that increases gradually towards two ends is fit to the shape of fixing roller, even the difference between the external diameter at the center of fixing roller and the external diameter at two ends enlarges, can make that also the width of clamping part and pressure are even, but, because this technology can not solve above-mentioned difference itself, above-mentioned thus difference, because the length of near outer perimeter the center of fixing roller and near the outer perimeter the two ends is poor, will in the heated wheel band, produce the distortion that makes its stress crooked in Width and cause the heated wheel band, thereby accelerate the problem of the deterioration of heated wheel band.That is to say that for the deterioration of heated wheel band and partially by phenomenon, and the homogeneity question of clamping part can not solve simultaneously.
[patent documentation 1] spy opens the 2008-216444 communique
[patent documentation 2] spy opens the 2004-226819 communique
[patent documentation 3] spy opens the 2002-333789 communique
Summary of the invention
The objective of the invention is to address the above problem, a kind of fixing roller, fixing device and image processing system thereof are provided, it can keep the homogeneity of clamping part when preventing to take turns the deterioration of band and leaning on phenomenon partially.
To achieve these goals, technical scheme 1 of the present invention provides a kind of fixing roller that comprises the axle center and be arranged on the elastic layer cylindraceous in the surface in this axle center, it is characterized in that:
In the surface portion of described elastic layer, have in center one side on this elastic layer direction of principal axis for being a plurality of protuberance of low normal cone face in high, end one side, its axial center from described elastic layer begins continuously to the end, and is configuration symmetrically with this center
Then, it is predetermined partially by the value of preventing that these a plurality of protuberances are set to adding up to of normal cone ladder residual quantity in its described normal cone face separately.
Described normal cone face is set in the total length across its protuberance.
Described a plurality of protuberance is set at respectively, make that the described normal cone ladder residual quantity in the described normal cone face of this protuberance is identical, and the total length of this protuberance is identical.
Technical scheme 4 of the present invention is characterized in that according to technical scheme 1 described fixing roller:
Be provided with anti-circular conical surface in the protuberance of at least a portion in described a plurality of protuberance, center one side of its described elastic layer on direction of principal axis is that low, end one side is for high, described elastic layer is smaller than the length of elastic layer on direction of principal axis of described normal cone face in the length on the direction of principal axis
End face by described end one side in the described anti-circular conical surface is connected with this normal cone face, and by the other end of described center one side, the normal cone face of the protuberance of other that are provided with being adjacent to this protuberance is connected in the described anti-circular conical surface.
The height that described a plurality of protuberance is set to its top separately is from center one side of described elastic layer on direction of principal axis, slowly reduces to end one side.
Fixing roller;
Open the heated wheel band of the ring-type of frame in described fixing roller;
By means of the backer roll of described heated wheel band and described fixing roller crimping,
It is characterized in that:
Described fixing roller is any one described fixing roller in the technical scheme 1 to 5.
Described fixing device is technical scheme 6 described fixing devices.
According to technical scheme 1, in the surface portion of the elastic layer of fixing roller, from elastic layer begin at axial center till the end continuously and with this center for being provided with a plurality of protuberances symmetrically.Then, these a few protuberances axial center one side of having this elastic layer separately is low normal cone face for high, end one side.Promptly, in fixing roller, with its center is that a plurality of paired normal cone face of symmetry is because be by continuously arranged from the center to the end, just producing the power that makes that the heated wheel band moves in elastic layer axial in each circular conical surface, because can in this direction of principal axis, these power be applied in the heated wheel band continuously, so, just with the formation of the prior art that a pair of normal cone face is set with the axial center that is symmetrical in fixing roller in the same manner, Width for the heated wheel band is all, can apply the power that moves in elastic layer axial at heart.
In addition, these a few convex portions do not have the normal cone face, and the total that is set to the normal cone ladder residual quantity in its each comfortable normal cone face be for prevent the heated wheel band partially by phenomenon, as the normal cone ladder residual quantity of necessity and predetermined partially by the value of preventing.That is to say, for prevent the heated wheel band partially by phenomenon and required partially by the value of preventing, be as the normal cone ladder residual quantity of a plurality of protuberances in normal cone face separately, be dispersed in the direction of principal axis of fixing roller.
According to technical scheme 2, because the normal cone face in the protuberance of being arranged on is the total length at its protuberance, promptly the axial length of the elastic layer in this protuberance is set up, it is poor just to have formed ladder between other protuberances of this protuberance and adjacency, promptly perpendicular to axial (vertical plane) of elastic layer, therefore, when being formed with the top of this protuberance in the coupling part of this vertical plane and normal cone face, the angle at this top is formed the acute angle towards center one side of elastic layer on direction of principal axis.
According to technical scheme 3, because the normal cone ladder residual quantity that described a plurality of protuberance is set in its normal cone face separately is identical, and the total length of this protuberance is identical, length with respect to the bus of the axial angle of elastic layer and normal cone face in the normal cone face is just identical, that is, the shape of the normal cone face of all protuberances is all identical.
According to technical scheme 4, be provided with anti-circular conical surface in the protuberance of at least a portion in described a plurality of protuberance, center one side of its described elastic layer on direction of principal axis is low, end one side is high, described elastic layer is smaller than the length of elastic layer on direction of principal axis of described normal cone face in the length on the direction of principal axis, end face by described end one side in the described anti-circular conical surface is connected with this normal cone face, and, lean on the other end of described center one side in the described anti-circular conical surface, the normal cone face of the protuberance of other that are provided with being adjacent to this protuberance is connected, so, anti-circular conical surface and normal cone face form the top of protuberance together, and, the normal cone face of adjacent projection is interconnected.
According to technical scheme 5, because the height that described a plurality of protuberance is set to its top separately is from center one side of described elastic layer on direction of principal axis, slowly reduce to end one side, near the external diameter that fixing roller has all just formed the center on its direction of principal axis is big, the positive crown shape that diminishes along with the external diameter near the end.
According to technical scheme 6, comprising fixing roller, open the heated wheel band of the ring-type of frame in described fixing roller, in fixing device by means of the backer roll of described heated wheel band and described fixing roller crimping, because described fixing roller is any one described fixing roller in the technical scheme 1 to 5, in this fixing roller, for prevent the heated wheel band partially by phenomenon and necessary normal cone ladder residual quantity be to be dispersed in the direction of principal axis of fixing roller by the value of preventing partially as the normal cone ladder residual quantity of a plurality of protuberances in normal cone face separately.
According to technical scheme 7, in comprising the image processing system of fixing device, because described fixing device is technical scheme 6 described fixing devices, in the fixing roller that this fixing device had, for prevent the heated wheel band partially by phenomenon and necessary normal cone ladder residual quantity partially by the value of preventing, be to be dispersed in the direction of principal axis of fixing roller as the normal cone ladder residual quantity of a plurality of protuberances in normal cone face separately.
According to technical scheme 1,6,7, because in fixing roller, the normal cone ladder residual quantity of necessity is inclined to one side to the value of preventing in order to prevent the leaning on phenomenon partially of heated wheel band, be as a plurality of protuberances in normal cone face separately normal cone ladder residual quantity and be dispersed in the direction of principal axis of fixing roller, so, compare for the formation that the prior art of a pair of normal cone face is set symmetrically with center with fixing roller, need not to enlarge the difference between the external diameter near the center of fixing roller external diameter and two ends, just can guarantee to prevent fixing roller all partially by phenomenon and required partially by the value of preventing.Thus, fixing roller just can be given full play to the power that makes that the heated wheel band moves to the center, thereby prevent partially by phenomenon, in addition, after the difference between the external diameter near external diameter the center of avoiding the expansion fixing roller and two ends, in the inhomogeneity while that can guarantee clamping part, can also prevent the deterioration of heated wheel band.
According to technical scheme 2, because the angle at the top in the protuberance is formed the acute angle in the axial central side of elastic layer, abut to by the top that will be formed with this acute angle in the inner face of heated wheel band, just produced the power that stops end one lateral deviation of heated wheel band in the direction of principal axis of elastic layer to be leaned on, thereby can further prevent the inclined to one side of heated wheel band effectively by phenomenon.
According to technical scheme 3, because the shape of the normal cone face of all protuberances all is the same, when the heated wheel band of fixing roller in being wound on its outer peripheral face rotates, the power that makes this heated wheel band move to the center that produces respectively in the normal cone face of each protuberance is all identical, thus, the power that the heated wheel band application is added in Width (being the direction of principal axis of the elastic layer) lining of heated wheel band becomes evenly, just can prevent wrinkle or the extension of heated wheel band in Width.
According to technical scheme 4, because the anti-circular conical surface that is arranged in a plurality of protuberances has formed the top of protuberance with the normal cone face, and the normal cone face of adjacent protuberance is interconnected, minimum position in other normal cone faces that just can the anti-circular conical surface by the dip plane come little gradient ground to connect the high-order bit (being the top) in the normal cone face and be adjacent, thereby can suppress to change the pressure variation of the clamping part on the heated wheel bandwidth direction that causes, just can alleviate the inequality of the image of photographic fixing in recording medium because of rapid height (being the external diameter of fixing roller).
According to technical scheme 5, because it is big near the center on the direction of principal axis that fixing roller all forms its external diameter, and the positive crown shape that reduces gradually to the end, so, can also further guarantee the homogeneity of clamping part can further preventing the inclined to one side of heated wheel band by in the phenomenon.
Description of drawings
With reference to following to accompanying drawing detailed explanation can understand complete description to public technology and feature thereof faster and betterly.Wherein,
The side view of first embodiment of [Fig. 1] fixing roller of the present invention.
The mode chart of the left-half of the elastic layer that fixing roller had of [Fig. 2] Fig. 1.
In the fixing roller of [Fig. 3] Fig. 1 to the key diagram of heated wheel band application power, (a) be that the heated wheel band is near the constitutional diagram in the left side of fixing roller, (b) being that the heated wheel band is positioned at the constitutional diagram in the central authorities of fixing roller, (c) is that the heated wheel band is near the constitutional diagram in the right side of fixing roller.
The side view of the 3rd embodiment of [Fig. 4] fixing roller of the present invention.
The mode chart of the left-half of the elastic layer that fixing roller had of [Fig. 5] Fig. 4.
[Fig. 6] is provided with the key diagram of the normal cone ladder residual quantity in the protuberance of anti-circular conical surface
The side view of other configuration examples of other fixing rollers of [Fig. 7] Fig. 1 (a plurality of formations of protuberance).
The summary pie graph of [Fig. 8] fixing device of the present invention.
The summary pie graph of [Fig. 9] image processing system of the present invention.
The side view of [Figure 10] fixing roller of the prior art.
To the key diagram of heated wheel band application power, being the stereographic map that is wound on the heated wheel band in the fixing roller (a) in the circular conical surface of [Figure 11] fixing roller in the prior art, (b) is the outboard profile of (a).
Symbol description
1,1A, 1B fixing roller
11 plugs
12,12A, 12B elastic layer
13,14 protuberances
2 photographic fixing bands (heated wheel band)
3 recording medium carrying rollers (backer roll)
100 image processing systems
116 fixing devices
S normal cone face
The V vertical plane
The anti-circular conical surface of W
The T top
The direction of principal axis of P elastic layer
Center on the direction of principal axis of O elastic layer
End on the direction of principal axis of L, R elastic layer
Positive crown shape amount in the C fixing roller
Normal cone ladder residual quantity in the normal cone face of Ht protuberance
Hs is partially by the value of preventing
Embodiment
(first embodiment of fixing roller)
Below, come first embodiment of fixing roller involved in the present invention is described referring to figs. 1 through Fig. 3.
Fixing roller 1 shown in Figure 1 comprises plug 11 and elastic layer 12.Plug 11 can be the drum that forms hollow made of iron.It can be that rotate at the center with its axle center for 116 li that plug 11 is installed in fixing device described later.Elastic layer 12 can be made of elastomeric elements such as foamed silastics, when forming drum, closely overlaps in the outer peripheral face of plug 11, and is set to plug 11 coaxial.As shown in Figure 1 and Figure 2, in outer peripheral face (surface portion) lining of elastic layer 12, be provided with a plurality of protuberances 13 of direction projection (13L1-13L3,13R1-13R3) outwardly.
13 li of these protuberances, be respectively arranged with normal cone face S, its center O one side in the direction of principal axis P of elastic layer 12 is high, is low in L, R end one side.That is, in this application, the normal cone face is that its external diameter begins the circular conical surface that diminishes gradually to end L, R from central side.Among a plurality of protuberances 13, near the normal cone face S separately that is configured in protuberance 13L1, the 13R1 center O of elastic layer 12 interconnects at the center O place.Also have, in the present embodiment, protuberance 13L1 and protuberance 13R1 look and look like a protuberance, cut apart the protuberance separately 13 that the back forms but be actually by the center O of elastic layer 12.In addition, be provided with the vertical plane V that is formed on perpendicular in the direction of principal axis P of (comprising approximate vertical) elastic layer 12 in other protuberance 13L2,13L3,13R2, the 13R3.The end of this vertical plane V is connected among the normal cone face S of this protuberance 13 by in the end of center O, and the other end is connected among the normal cone face S with other protuberances 13 of this protuberance 13 adjacency by in the end of end L, R.
The top T that forms in normal cone face S in protuberance 13 and the connecting portion of vertical plane V is formed the acute angle of the center O side in the direction of principal axis P of elastic layer 12.Here, the acute angle of the center O side in the direction of principal axis P of elastic layer 12 is meant, protuberance 13 in the cross sectional shape (being the cross section of triangle) of the direction of principal axis P of elastic layer 12, in the acute angles that are formed discontented 90 degree, the line at the center on the base of this drift angle and this triangle tends in the center O side in the direction of principal axis P of elastic layer 12 corresponding to the drift angle of top T.
In addition, with two protuberances of the center O side in the direction of principal axis P of elastic layer 12 for disposing symmetrically, it is a pair of to be that protuberance 13L1 and protuberance 13R1, protuberance 13L2 and protuberance 13R2 and protuberance 13L3 and protuberance 13R3 constitute respectively, and forms with the identical shaped center O that is symmetrical in mutually.That is to say that the profile of elastic layer 12 is for forming symmetrically with the center O among the direction of principal axis P.
A plurality of protuberances 13 has normal cone face S respectively, and then, the normal cone ladder residual quantity Ht among this normal cone face S is expressed from the next.
The formula of normal cone ladder residual quantity Ht1 among the normal cone face S of protuberance 13L1 is as follows:
Ht1＝d1-e1
Wherein, d1 is the external diameter by an end of the center O of above-mentioned normal cone face S, and e1 is the external diameter by the other end of L end.
In addition, the formula of the normal cone ladder residual quantity Ht2 among the normal cone face S of protuberance 13L2 is as follows:
Ht2＝d2-e2
Wherein, d2 is the external diameter by an end (top T) of the center O of above-mentioned normal cone face S, and e2 is the external diameter by the other end of L end.
In addition, the formula of the normal cone ladder residual quantity Ht3 among the normal cone face S of protuberance 13L3 is as follows:
Ht3＝d3-e3
Wherein, d3 is the external diameter by an end (top T) of the center O of above-mentioned normal cone face S, and e3 is the external diameter by the other end of L end.
Also have, represent with normal cone ladder residual quantity Ht1-Ht3 similarly among the protuberance 13R1-13R3.
The total of the normal cone ladder residual quantity Ht1-Ht3 separately of these protuberances 13L1-13L3 (protuberance 13R1-13R3) is as the normal cone ladder residual quantity of leaning on necessity of phenomenon partially that prevents photographic fixing band 2 described later, set respectively, predetermined to become partially by the value of preventing Hs.That is to say, for prevent photographic fixing band 2 partially by phenomenon and necessary partially by the value of preventing Hs, be normal cone ladder residual quantity Ht1-Ht3 separately as a plurality of protuberance 13, be dispersed in and be set in the direction of principal axis P of fixing roller 1.
Should can pass through preliminary experiment or simulation etc. by the value of preventing Hs partially, the a plurality of fixing roller 1 that has been set for the aggregate value of different each other normal cone ladder residual quantity Ht, confirm this fixing roller 1 and be wound on photographic fixing band 2 in its outer peripheral face when rotating together, whether the inclined to one side to phenomenon of this photographic fixing band 2 takes place, confirm the result according to it, after considering the formation (shape, material etc.) of fixing roller, come to determine in order to prevent partially and necessary partially by the value of preventing Hs by phenomenon.Should also can decide by the value of preventing Hs partially according to the affirmation result of the existing fixing roller of above-mentioned employing.In the present embodiment, be 0.5mm by the value of preventing Hs partially.
In the present embodiment, the external diameter of plug 11 is 18mm.Elastic layer 12 is 52.3mm at the external diameter a of its axial center O (being d1), and external diameter b, the c of end L, R (being e3) is 52mm, and total length K is 318mm.In addition, a plurality of protuberances 13 has six (about each three), the total length K1 of protuberance 13L1 is that 53mm, normal cone ladder residual quantity Ht1 are 0.2mm, the total length K2 of protuberance 13L2 is that 53mm, normal cone ladder residual quantity Ht2 are 0.2mm, and the total length K3 of protuberance 13L3 is that 53mm, normal cone ladder residual quantity Ht3 are 0.1mm.In addition, the formation of protuberance 13R1-13R3 also is same.That is, the normal cone ladder residual quantity Ht1-Ht3's the normal cone face S of elastic layer 12 each protuberance 13 till (or end R) from its center O to end L adds up to 0.5mm.
Then, with reference to Fig. 3 (a)-(c) action involved in the present invention (effect) in the present embodiment is described.
The elastic layer 12 of fixing roller 1 has a plurality of protuberance 13, is provided with normal cone face S separately 13 li of these protuberances.Therefore, when the photographic fixing band 2 of fixing roller 1 in being wound on its outer peripheral face rotates, in each normal cone face S, will act on the power FL, the FR that make that the center O of the direction of principal axis P of this photographic fixing band 2 in elastic layer 12 moves.
At this moment, because elastic layer 12 forms symmetrically with this center O, for example, shown in Fig. 3 (a), when photographic fixing band 2 comes in the end L side of fixing roller partially, Width for photographic fixing band 2, center O from fixing roller 1 begins area with end L side contacts and is greater than center O from fixing roller 1 and begins area with end R side contacts, so, make photographic fixing band 2 just be greater than the power FR reverse to the power FL that end R moves with it from end L, so just shown in Fig. 3 (b), heated wheel is brought back center O back to.
In addition, photographic fixing band 2 is shown in Fig. 3 (c), time marquis in coming to the end R side of fixing roller partially, also be similarly, for the Width of photographic fixing band 2, the center O from fixing roller 1 begins area with end R side contacts and is greater than center O from fixing roller 1 and begins area with end L side contacts, so, make the heated wheel band just be greater than the power FL reverse to the power FR that end L moves, so with regard to shown in Fig. 3 (b), heated wheel is brought back center O back to it from end R.
In this fixing roller 1, photographic fixing band 2 was prevented automatically between two parties afterwards partially by phenomenon.Then, because the total of the normal cone ladder residual quantity Ht among the normal cone face S of each protuberance 13 be set to for prevent photographic fixing band 2 partially by phenomenon and as the normal cone ladder residual quantity of necessity be determined in advance partially by the value of preventing Hs, so just can prevent the inclined to one side phenomenon of leaning on of heated wheel band effectively.
In the surface portion of the elastic layer 12 of the fixing roller 1 of present embodiment, a plurality of protuberances 13 begins continuously to end L, R from the center O of the direction of principal axis P of elastic layer 12, and with this center O for disposing symmetrically.Then, center O one side that these a few protuberances 13 have respectively in the direction of principal axis P of this elastic layer 12 is height, and is low normal cone face S in end L, R one side.Promptly, 1 li of fixing roller, because with its center O is that a plurality of paired normal cone face S of symmetry begins to end L from center O, be arranged continuously till the R, in each normal cone face S, just produced the power F that the center O in the direction of principal axis P of elastic layer 12 moves with respect to photographic fixing band 2, in this direction of principal axis P, can apply this power F with respect to photographic fixing band 2 continuously, therefore, just with the existing formation that a pair of normal cone face is set symmetrically with the center in the direction of principal axis of fixing roller similarly, all with respect to the Width of photographic fixing band 2 just can apply the power F that moves in the center O in the direction of principal axis P of elastic layer 12.
In addition, these a few protuberances 13 have normal cone face S respectively, then, the total of normal cone ladder residual quantity Ht1-Ht3 among the normal cone face S separately of these a few protuberance 13L1-13L3 (protuberance 13R1-13R3), in order to prevent the inclined to one side of photographic fixing band 2 by phenomenon, as the normal cone ladder residual quantity of necessity, be set to predetermined respectively partially by the value of preventing Hs.That is to say that necessity is inclined to one side to the value of preventing Hs in order to prevent the leaning on phenomenon partially of photographic fixing band 2, is as the normal cone ladder residual quantity Ht1-Ht3 of a plurality of protuberance 13 in normal cone face S separately, is set dispersedly in the direction of principal axis P of fixing roller 1.
In addition, be arranged on the normal cone face S in each protuberance 13L2,13L3,13R2, the 13R3 and be set up across separately total length K2, K3 because be, it is poor just to form ladder between other protuberances 13 of this protuberance 13 and adjacency, promptly, in the direction of principal axis P of elastic layer 12, be formed with vertical face (vertical plane V), thus, just in the coupling part between this vertical plane V and the normal cone face S, formed the top T of this protuberance 13, simultaneously, the angle of this top T is formed the acute angle of center O one side in the direction of principal axis P of elastic layer 12.
As mentioned above, according to the present invention, in fixing roller 1, because in order to prevent the inclined to one side of photographic fixing band 2 by phenomenon, be determined in advance as the normal cone ladder residual quantity of required necessity partially by the value of preventing Hs, be as the normal cone ladder residual quantity Ht among the normal cone face S separately of a plurality of protuberance 13, direction of principal axis P at fixing roller 1 is disperseed the back to be provided with, compare for the formation that the prior art of a pair of normal cone face is set symmetrically with center with fixing roller, need not to enlarge the external diameter a and the end L of the center O of fixing roller 1, the external diameter b of R, difference between the c just can be guaranteed all to be used to prevent partially by phenomenon and necessary partially by the value of preventing Hs as fixing roller 1.Therefore, fixing roller 1 can be given full play to the power F that moves to center O with respect to photographic fixing band 2, thereby prevent partially by phenomenon, also have, difference between external diameter b, the c of the external diameter a that avoids the center O that enlarges fixing roller 1 and end L, R can also prevent the deterioration of photographic fixing band 2 can guarantee the inhomogeneity while of clamping part N.
In addition, the angle of top T in the protuberance 13 is because be acute angle in center O one side in the direction of principal axis P of elastic layer 12, the butt of the top T by being formed with this acute angle and the inner face of photographic fixing band 2, resist mutually in the power of in end L, R one side, leaning on partially in the direction of principal axis P of elastic layer 12 with photographic fixing band 2, just can further prevent the inclined to one side of photographic fixing band 2 effectively by phenomenon.
(second embodiment of fixing roller)
Below second embodiment of fixing roller involved in the present invention is described.The fixing roller of this second embodiment only is the size difference of each several part because of identical with the shape of first embodiment, so the employed Fig. 1 of explanation, Fig. 2 of above-mentioned first embodiment of reference.
In the fixing roller 1 of this second embodiment, the shape of the normal cone face S of all protuberances 13 (13L1-13L3,13R1-13R3) is all identical.Be specifically, the normal cone ladder residual quantity Ht1-Ht3 among the normal cone face S of each protuberance 13 is identical, and the total length K1 of protuberance 13, K2, K3 are identical.
So, by making the shape of normal cone face S of all protuberances 13, promptly the length with respect to the bus of the axial angle of the elastic layer among the normal cone face S and normal cone face S is all identical, fixing roller 1 is when the photographic fixing band in being wound on its outer peripheral face 2 rotates, because the power F that makes this photographic fixing band 2 move towards the center that the normal cone face S of each protuberance 13 produces separately is identical, Width (the direction of principal axis P of elastic layer 12) for photographic fixing band 2, after making that the power that is applied to 2 li on photographic fixing band is even, just can prevent the wrinkle or the extension of the Width of photographic fixing band 2.Certainly also can obtain the effect same with first embodiment.
In addition, for the outside diameter d 1-d3 of the maximum outside diameter in each protuberance 13, equal outside diameter d 2-outside diameter d 3 with external diameter d1-outside diameter d 2, promptly the difference with maximum outside diameter in the protuberance 13 of adjacency is all respectively mutually.Thus, because with the imaginary line after the connection of the maximum outside diameter position in the protuberance of adjacency is straight line, each protuberance 13 contacts with photographic fixing band 2 more equably, and therefore makes that the power that is applied to 2 li on photographic fixing band is more even, thereby more can prevent wrinkle or the extension of photographic fixing band 2 in Width.
In addition, because the relation of size, when can not making that all protuberances 13 all form same shape, also can form protuberance 13 respectively, so that it is identical to be arranged in the shape of normal cone face S of the protuberance 13 beyond two protuberances 13 at two ends, and be greater than two protuberances 13 being positioned at two ends (adjusting size) with two protuberances 13 that are positioned at two ends.
(the 3rd embodiment of fixing roller)
Below, the 3rd embodiment of fixing roller involved in the present invention is described with reference to Fig. 4-Fig. 6.
Fixing roller 1A shown in Figure 4 comprises plug 11 and elastic layer 12A.The formation of plug 11 is identical with above-mentioned first embodiment.Elastic layer 12A can be made of the elastomeric element of foaming silicon etc., is forming the while cylindraceous, closely overlaps in the outer peripheral face of plug 11 and is set to plug 11 coaxial.As Fig. 4, shown in Figure 5,, a plurality of protuberance 14 (14L1-14L3,14R1-14R3) towards outer direction projection is set in outer peripheral face (surface portion) lining of elastic layer 12A.
In the inside separately of these a few protuberances 14, be provided with in center O one side in the direction of principal axis P of elastic layer 12A to high, and be low normal cone face S in end L, R one side.Among a plurality of protuberances 14, near the normal cone face S separately that is configured in protuberance 14L1, the 14R1 center O of elastic layer 12A interconnects by center O.In addition, in in addition protuberance 14L2,14L3,14R2,14R3, be provided with anti-circular conical surface W, its in center O one side of elastic layer 12A for low be high in end L, R one side, simultaneously, length K 22, the K32 in the direction of principal axis P of elastic layer 12A is smaller than length K 21, the K31 of normal cone face S in the direction of principal axis P of elastic layer 12A.In this application, anti-circular conical surface is meant that its external diameter the circular conical surface that end L, R slowly increase from center O one side direction.This anti-circular conical surface W near the end of its end L, R with after the end of close center O among this normal cone face S is connected, form the top T of this protuberance 14 with the normal cone face S of this protuberance 14, and, be connected near the other end of center O other protuberances 14 that are provided with in abutting connection with ground with this protuberance 14 normal cone face S by in the end of end L, R.That is to say that the anti-circular conical surface W normal cone face S of adjacent protuberance 14 each other carries out mutual connection.
In addition, with two protuberances of the center O side in the direction of principal axis P of elastic layer 12 for disposing symmetrically, it is a pair of to be that protuberance 14L1 and protuberance 14R1, protuberance 14L2 and protuberance 14R2 and protuberance 14L3 and protuberance 14R3 constitute respectively, and mutually with identical shaped and be symmetrical in center O and form.That is to say that the profile of elastic layer 12A is for to form symmetrically with the center O among the direction of principal axis P.
A plurality of protuberances 14 has normal cone face S respectively, and then, the normal cone ladder residual quantity Ht among this normal cone face S is expressed from the next.
The formula of normal cone ladder residual quantity Ht1 among the normal cone face S of protuberance 14L1 is as follows:
Ht1＝d1-e1
Wherein, d1 is the external diameter by an end of the center O of above-mentioned normal cone face S, and e1 is the external diameter by the other end of L end.
In addition, the formula of the normal cone ladder residual quantity Ht2 among the normal cone face S of protuberance 14L2 is as follows:
Ht2＝(d2-e2)-(d2-e1)＝d2-e2-d2+e1＝e1-e2
Wherein, d2 is the external diameter of the top T of raised part 14L2, and e1 is the external diameter by an end of the center O of raised part 14L2, and e2 is the external diameter by the other end of the L end of raised part 14L2.
In addition, the formula of the normal cone ladder residual quantity Ht3 among the normal cone face S of protuberance 14L3 is as follows:
Ht3＝(d3-e3)-(d3-e2)＝d3-e3-d3+e2＝e2-e3
Wherein, d3 is the external diameter of the top T of raised part 14L3, and e2 is the external diameter by an end of the center O of raised part 14L3, and e3 is the external diameter by the other end of the L end of raised part 14L3.
Also have, represent with normal cone ladder residual quantity Ht1-Ht3 similarly among the protuberance 14R1-14R3.
For the formula of above-mentioned normal cone ladder residual quantity Ht2, Ht3, carry out following explanation with reference to Fig. 6.Shown in Figure 6 is the figure of the protuberance 14L2 that sees from the side.In the figure, draw the boost line AB that is parallel to direction of principal axis P, draw boost line TD, draw the boost line CE that is parallel to direction of principal axis P, draw boost line AE perpendicular to direction of principal axis P by an A by e2 perpendicular to direction of principal axis P by top T by e1.In these boost lines formed triangle △ ATD and triangle △ BTD, the sinusoidal TD of the angle A of △ ATD is identical with the sinusoidal TD of the angle B of △ BTD, and for angle A and angle B, because be that these sinusoidal TD (being the ladder residual quantity) are cancelled out each other towards reciprocal normal cone face S and anti-circular conical surface W are with respect to the angle of direction of principal axis P each other.In addition, it also is same being positioned at the △ A ' T ' D ' and the △ B ' T ' D that oppose in the side.Therefore, in normal cone face S, have only to have constituted the triangle △ CAE that formed by boost line and the part of triangle △ C ' A ' E ' is only effective normal cone face, sinusoidal A ' E ' of the sinusoidal AE of △ CAE and △ C ' A ' E ' becomes the normal cone ladder residual quantity Ht2 among the protuberance 14L2.Then, this normal cone ladder residual quantity Ht is the external diameter e2 at both ends of protuberance 14L2 and the difference of e1 as shown in Figure 6.In addition, also be same for protuberance 14L3.Also have, for the protuberance 14L2 that is provided with anti-circular conical surface W, protuberance 14L3, the external diameter of an end of close center O is greater than the external diameter near the other end of end L.In addition, formation according to fixing roller, in the protuberance 14 of a part, may have normal cone ladder residual quantity and be negative situation, even in this case, as described later, though so long as the total of the normal cone ladder residual quantity of a plurality of protuberance 14 satisfies and predeterminedly gets final product by the value of preventing Hs partially, the normal cone ladder residual quantity in best still all protuberances 14 all is positive.
The total of the normal cone ladder residual quantity Ht1-Ht3 separately of these a few protuberance 14L1-14L3 (protuberance 14R1-14R3), for the photographic fixing band 2 described later that prevents the heated wheel band partially by phenomenon, as the normal cone ladder residual quantity of necessity, be set to predetermined respectively partially by the value of preventing Hs.That is to say that necessity is inclined to one side to the value of preventing Hs in order to prevent the leaning on phenomenon partially of photographic fixing band 2, is the normal cone ladder residual quantity Ht1-Ht3 separately as a plurality of protuberance 14, is set dispersedly in the direction of principal axis P of fixing roller 1.
In this fixing roller 1A, with above-mentioned first embodiment similarly, the action (effect) shown in carrying out in Fig. 3 (a)-(c).
In the present embodiment, with above-mentioned first embodiment similarly, in the surface portion of the elastic layer 12A of fixing roller 1A, a plurality of protuberances 14 begins continuously to end L, R from the center O of the direction of principal axis P of elastic layer 12A, and with this center O for disposing symmetrically.Then, center O one side that these a few protuberances 14 have respectively in the direction of principal axis P of this elastic layer 12A is height, and is low normal cone face S in end L, R one side.Promptly, in fixing roller 1A, because with its center O is that a plurality of paired normal cone face S of symmetry begins to end L from center O, be arranged continuously till the R, in each normal cone face S, just produced the power F that the center O in the direction of principal axis P of elastic layer 12A moves with respect to photographic fixing band 2, in this direction of principal axis P, can apply this power F with respect to photographic fixing band 2 continuously, therefore, just with the existing formation that a pair of normal cone face is set symmetrically with the center in the direction of principal axis of fixing roller similarly, all with respect to the Width of photographic fixing band 2 can apply the power F that moves in the center O in the direction of principal axis P of elastic layer 12A.
In addition, these a few protuberances 14 have normal cone face S respectively, then, the total of normal cone ladder residual quantity Ht1-Ht3 among the normal cone face S separately of these a few protuberance 14L1-14L3 (protuberance 14R1-14R3), in order to prevent the inclined to one side of photographic fixing band 2 by phenomenon, as the normal cone ladder residual quantity of necessity, be set to predetermined respectively partially by the value of preventing Hs.That is to say that necessity is inclined to one side to the value of preventing Hs in order to prevent the leaning on phenomenon partially of photographic fixing band 2, is as the normal cone ladder residual quantity Ht1-Ht3 of a plurality of protuberance 14 in normal cone face S separately, is set dispersedly in the direction of principal axis P of fixing roller 1.
In addition, protuberance 14 (14L2,14L3,14R2,14R3) lining at least a portion of a plurality of protuberances 14, be provided with anti-circular conical surface W, its in center O one side of elastic layer 12A for low be high in end L, R one side, simultaneously, length K 22, the K32 in the direction of principal axis P of elastic layer 12A is smaller than length K 21, the K31 of normal cone face S in the direction of principal axis P of elastic layer 12A.Then, the direction of principal axis P that is arranged in elastic layer 12A of this anti-circular conical surface W by an end of end L, R one side with after this normal cone face S is connected, form the top T of this protuberance 14 with the normal cone face S of this protuberance 14, and the direction of principal axis P that is arranged in elastic layer 12A of this anti-circular conical surface W is connected in the normal cone face S of other protuberances 14 that are provided with this protuberance 14 adjacency ground by the other end of center O one side.That is to say that anti-circular conical surface W forms the top T of protuberance 14 with normal cone face S, and interconnect with mutual neighbour's normal cone face S.
As mentioned above, according to the present invention, with above-mentioned first embodiment similarly, in fixing roller 1A, because in order to prevent the inclined to one side of photographic fixing band 2 by phenomenon, be determined in advance as the normal cone ladder residual quantity of required necessity partially by the value of preventing Hs, be as the normal cone ladder residual quantity Ht among the normal cone face S separately of a plurality of protuberance 14, direction of principal axis P at fixing roller 1 is disperseed the back to be provided with, compare for the formation that the prior art of a pair of normal cone face is set symmetrically with center with fixing roller, need not to enlarge the external diameter a and the end L of the center O of fixing roller 1A, the external diameter b of R, difference between the c just can be guaranteed all to be used to prevent partially by phenomenon and necessary partially by the value of preventing Hs as fixing roller 1.Therefore, fixing roller 1A can give full play to the power F that moves to center O with respect to photographic fixing band 2, thereby prevent partially by phenomenon, also have, difference between external diameter b, the c of the external diameter a that avoids the center O that enlarges fixing roller 1A and end L, R can also prevent the deterioration of photographic fixing band 2 can guarantee the inhomogeneity while of clamping part N.
In addition, because the anti-circular conical surface W that is arranged on 14 li of a plurality of protuberances has formed the top T of protuberance 14 with normal cone face S and has interconnected with mutual neighbour's normal cone face S, among the normal cone face S among the highest position (being top T) and other normal cone faces S that is adjacent the minimum position anti-circular conical surface W by the dip plane carry out gradient and be connected slowly, therefore, the pressure that just can suppress to change because of rapid height (being the external diameter of fixing roller) clamping part N in the Width of the photographic fixing band 2 cause changes, thereby can alleviate the inequality of the image of photographic fixing in the recording medium.
Fixing roller involved in the present invention also can be the formation beyond shown in above-mentioned first-Di, three embodiments, for example, in the above-described first embodiment, also can be to form a plurality of protuberance 13 as follows, promptly, make the height of top T separately of a plurality of protuberances 13 in elastic layer 12 surface portions be arranged on fixing roller 1, the center O side from the direction of principal axis P of described elastic layer 12 slowly reduces in end L, R one side.So, because the external diameter that fixing roller 1 all forms in the center O of direction of principal axis P is big, and,, can also further guarantee the homogeneity of clamping part N can further preventing the inclined to one side of photographic fixing band 2 by in the phenomenon along with the positive crown shape that diminishes near its external diameter of end L, R.In addition, also be same for second, third embodiment.
In addition, 12 li of elastic layers in the above-described first embodiment, though a plurality of protuberances 13 be with about each three, amount to six and be provided with, be not limited thereto.For example, fixing roller 1B as shown in Figure 7 is such, a plurality of protuberance 13 of 12 li of elastic layers be with about each eight, amount to 16 and be provided with, only otherwise violate purpose of the present invention, the number of protuberance 13 is arbitrarily.So, by the number of a plurality of protuberance 13 is set more, just can be with more slightly disperseing by the value of preventing Hs partially among the fixing roller 1B required in order to prevent to lean on phenomenon partially, promptly, because can make the normal cone ladder residual quantity Ht among the normal cone face S of a protuberance 13 become littler, the pressure that just can suppress to change because of rapid height (being the external diameter of fixing roller) clamping part N of photographic fixing band 2 in Width cause changes, thereby can alleviate the inequality of the image of photographic fixing in the recording medium.In addition, also be same for second, third embodiment.
In addition, the formation of a plurality of protuberances 13 of this fixing roller 1B is that the height of its top T separately is that center O one side from the direction of principal axis P of elastic layer 12B begins, and slowly reduces in end L, R one side.Thus, all positive crown shapes that just forms the tubbiness shown in the dotted line among the figure of fixing roller 1B can further preventing the inclined to one side in the phenomenon of photographic fixing band 2, can also further be guaranteed the homogeneity of clamping part N.In addition, also be same for second, third embodiment.
(embodiment of fixing device)
Below, the embodiment of fixing device involved in the present invention is described with reference to Fig. 8.
Fixing device 116 comprises fixing roller 1 and as illustrated in fig. 8 as the photographic fixing band 2 of heated wheel band with as the recording medium carrying roller 3 of backer roll with as the wheel band carrying roller 5 of warm-up mill, and thermal source 6 and 7.This fixing roller 1 is the fixing roller 1. in first embodiment of the related fixing roller of the invention described above
Recording medium carrying roller 3 can be made of iron, forms the plug cylindraceous of hollow, has the elastic layer that the silicon rubber by tight coincidence constitutes in the outside surface of this plug.Near the center that all forms of recording medium carrying roller 3 external diameter is little, and the anti-crown shape that its external diameter increases gradually towards two ends.Recording medium carrying roller 3 is crimped onto 1 li of fixing roller after being clipped in photographic fixing band 2 between itself and the fixing roller 1 when can being supported by axle rotationally, with form and fixing roller 1 between clamping part N.The inside of the plug of recording medium carrying roller 3 is provided with the thermal source 6 that for example is made of known heater meanses such as heating wire or halogen heat-generating pipes.Recording medium carrying roller 3 will be as the recording medium of sheet go to pass through clamping part N with paper G conveyance.In addition, recording medium carrying roller 3 is with paper G during by clamping part N, with the heat of thermal source 6 be delivered to the elastic layer butt with in the paper G.
In the present embodiment, the external diameter at the two ends of recording medium carrying roller 3 is 50mm, and the thickness of elastic layer is 1.5mm.Then, be low in the central side on this direction of principal axis, and end side is that high a pair of anti-circular conical surface is to be provided with symmetrically with this center, it all forms anti-crown shape.Then, the anti-crown shape amount D in the recording medium carrying roller 3 is expressed as follows:
D＝(b+c)/2-a
Wherein, a is the external diameter (being minimum outer diameter) at the center in the direction of principal axis of recording medium carrying roller 3, and b and c are the external diameters at two ends.
Make that the value that obtains by this formula is 0.09mm.Certainly, this formation is an example, and recording medium carrying roller 3 also can form the cylindric of external diameter even (being that anti-crown shape amount D is O), and this shape can suitably determine according to the formation of fixing device 116.
Though the heat that wheel band carrying roller 5 is used for coming from thermal source 7 in the portion of setting within it (heater means same with thermal source 6) is delivered to the photographic fixing band of butt and goes for 2 li, but carry out the black coating by face within it, after just can carrying out effectively concentrating, improve the heating efficiency of wheel band carrying roller 5 to the heat (infrared ray) of thermal source 7.Though wheel band carrying roller 5 can be made of metals such as aluminium and carbon steels, because described aluminium is high heat conductive metal, so also can be described as the constituent material that is fit to warm-up mill.In addition, in the outer peripheral face of wheel band carrying roller 5, also reduce abrasion for well to cover the less resins of friction factor such as fluoroplast.
In fixing device 116, fixing roller 1 is rotated driving by not shown drive division, and thus, photographic fixing band 2 just rotates mobile with certain speed in prescribed direction (among the figure in the counter-clockwise direction) lining around fixing roller 1 and wheel band carrying roller 5.At this moment, photographic fixing band 2 is heated in the temperature of regulation by wheel band carrying roller 5 (being thermal source 7).In addition, recording medium carrying roller 3 is by not shown drive division, with fixing roller 1 (being photographic fixing band 1) constant speed ground when prescribed direction (among the figure in the clockwise direction) lining is rotated driving, be heated to by thermal source 6 in the temperature of regulation.Then, by be configured in image described later in the upstream form means be formed with unfixed toner image 8 be sent to 116 li of fixing devices with paper G the time, recording medium carrying roller 3 should go to pass through clamping part N with paper G conveyance.Afterwards, when passing through this clamping part N, by being heated to photographic fixing band 2 in the set point of temperature and recording medium carrying roller 3 when coming unfixed toner image 8 heated, after pressurizeing by fixing roller 1 and recording medium carrying roller 3, just with these unfixed toner image 8 photographic fixing to in the paper G.Then, will pass out in the row's paper disc that is configured in the downstream with paper G again.
Promptly, in the present embodiment, has fixing roller 1, with the photographic fixing band 2 of a frame 1 li of this fixing roller, in the fixing device 116 of Jie by the recording medium carrying roller 3 of photographic fixing band 2 and this fixing roller 1 crimping, as fixing roller 1 because have above-mentioned fixing roller 1, fixing device 116 all fixing rollers 1 are in order to prevent the inclined to one side to phenomenon of photographic fixing band 2, as the normal cone ladder residual quantity of necessity and predetermined, be to be arranged in the direction of principal axis of fixing roller 1 by dispersion as the normal cone ladder residual quantity Ht of protuberance 13 in normal cone face S separately with normal cone face S partially by the value of preventing Hs.
More than, according to the present invention, in all fixing rollers 1 of fixing device 116, because in order to prevent the inclined to one side of photographic fixing band 2 by phenomenon, be determined in advance as the normal cone ladder residual quantity of required necessity partially by the value of preventing Hs, be as the normal cone ladder residual quantity Ht among the normal cone face S separately of a plurality of protuberance 13, in the direction of principal axis P of fixing roller 1, disperseed the back to be provided with, compare for the formation that the prior art of a pair of normal cone face is set symmetrically with center with fixing roller, need not to enlarge the external diameter a and the end L of the center O of fixing roller 1, the external diameter b of R, difference between the c just can be guaranteed all to be used to prevent partially by phenomenon and necessary partially by the value of preventing Hs as fixing roller 1.Therefore, fixing roller 1 can be given full play to the power F that moves to center O with respect to photographic fixing band 2, thereby prevent partially by phenomenon, also have, difference between external diameter b, the c of the external diameter a that avoids the center O that enlarges fixing roller 1 and end L, R can also prevent the deterioration of photographic fixing band 2 can guarantee the inhomogeneity while of clamping part N.
In addition, in the present embodiment, be roller with fixing roller 1 of above-mentioned first embodiment as fixing roller 1, also can replace with the fixing roller 1 of above-mentioned second embodiment or the fixing roller 1A of the 3rd embodiment.
(embodiment of image processing system)
Below, the embodiment of image processing system involved in the present invention is described with reference to Fig. 9.
Image processing system 100 as shown in Figure 9, have by not shown drive division and be rotated in the direction of arrow (counter-clockwise direction among the figure) lining, photoreceptor 101 as the drum type that looks like the mounting body, around this photoreceptor 101, disposed charged means 102, cleaning means 103, comprised development section 107 as the development sleeve 105 of the development means of the electrostatic latent image on the photoreceptor 101 being carried out development, and transfer printing means 106.In addition, image processing system 100 has the fixing device 116 as the embodiment of above-mentioned fixing device involved in the present invention.
Photoreceptor 101 is exposed the back as the laser LZ that writes the laser optical system 140 of means (exposure means) and forms electrostatic latent image by coming from after by charged means 102 uniform chargeds.Then, be formed on and become toner image after electrostatic latent image on the photoreceptor 101 is developed by development section 107.The toner image that develops on this photoreceptor 101 is transferred to using in the paper G as recording medium by transfer printing means 106 as described later.At this moment, be transferred to the toner image in the paper G also not by photographic fixing, just unfixed toner image 8.Then, photoreceptor 101 is cleaned by cleaning means 103 after toner image is transferred.So, photoreceptor 101, charged means 102, laser optical system 140, development section 107, and transfer printing means 106 have constituted unfixed toner image 8 is formed on the image on the paper G and form means.
Be provided with the paper supply cartridge 110 that in arrow a direction, to load and unload in the bottom of image processing system 100.Be housed in being supported by middle plate 111 with paper G of 110 li of paper supply cartridges, by the power of not shown spring, being situated between is pushed to 113 li of paper feed rollers by arm 112.Be positioned at uppermost paper (paper topmost) in the paper supply cartridge 110 after not shown control part sends instruction, rotation by paper feed roller 113 comes by paper supply, through the superimposed paper feeding that prevents of separating pad 114, arrived the contraposition roller in downstream to 115 li by conveyance simultaneously.
In addition, sheet feed stacker 132 can be installed in the side of housing department 131 rotationally, and the sheet feed stacker 132 interior uppermost paper G that use pass through paper feed roller 133 by behind the paper supply, through the superimposed paper feeding that prevents of separating pad, are arrived the contraposition roller in downstream to 115 li by conveyance simultaneously.Selectively carried out paper supply with a certain side among the paper G in the paper supply cartridge 110 and in the sheet feed stacker 132.
The contraposition roller to 115 with photoreceptor 101 on image (toner image) synchronous opportunity deliver to 106 li of transfer printing means with paper G with what conveyance came.Transfer printing means 106 with the image on the photoreceptor 101 be transferred to from the contraposition roller to 115 send here go up with paper G after, transfer printing have this image (being unfixed toner image 8) with paper G just by conveyance to 116 li of fixing devices.Fixing device 116 as described above will be with 8 photographic fixing of the unfixed toner image on the paper G to using in the paper G by heating and pressurization.
From fixing device 116 finish photographic fixing with paper G by exit roller to 120, image surface is discharged on the paper disc 122 afterwards by stacking by ejection port 121 down.For corresponding to the size that is discharged from, arrange paper bracket panel 125 and can in arrow b direction, slide with paper G.In addition, constituting the cover cap 138 of arranging paper disc 122 can be that open at the center with rotating fulcrum 139.
Dispose operating surface in the right side among the figure of this image processing system 100, guidance panel 130 is given prominence in the upper front of housing department 131 (right side, top of image processing system 100) lining.In the drawings in the casing 134 in the left side, take in the electrical control gear of power circuit 135 or printed panel (driven by engine motherboard) 136 etc. in configuration, also taken in control motherboard 137.
Promptly, in the present embodiment, has the image processing system 100 of fixing device 116 because comprised above-mentioned fixing device 116, the all fixing roller 1 of this fixing device 116 for prevent photographic fixing band 2 partially by phenomenon, as the normal cone ladder residual quantity of necessity and predetermined, be to be arranged in the direction of principal axis of fixing roller 1 by dispersion as the normal cone ladder residual quantity Ht of protuberance 13 in normal cone face S separately with normal cone face S partially by the value of preventing Hs.
More than, according to the present invention, in all fixing rollers 1 of the fixing device 116 of image processing system, because in order to prevent the inclined to one side of photographic fixing band 2 by phenomenon, be determined in advance as the normal cone ladder residual quantity of required necessity partially by the value of preventing Hs, be as the normal cone ladder residual quantity Ht among the normal cone face S separately of a plurality of protuberance 13, in the direction of principal axis P of fixing roller 1, disperseed the back to be provided with, compare for the formation that the prior art of a pair of normal cone face is set symmetrically with center with fixing roller, need not to enlarge the external diameter a and the end L of the center O of fixing roller 1, the external diameter b of R, difference between the c just can be guaranteed all to be used to prevent partially by phenomenon and necessary partially by the value of preventing Hs as fixing roller 1.Therefore, fixing roller 1 can be given full play to the power F that moves to center O with respect to photographic fixing band 2, thereby prevent partially by phenomenon, also have, difference between external diameter b, the c of the external diameter a that avoids the center O that enlarges fixing roller 1 and end L, R can also prevent the deterioration of photographic fixing band 2 can guarantee the inhomogeneity while of clamping part N.
(action checking)
The present inventor has carried out the action checking in order to confirm effect of the present invention for roller involved in the present invention and roller of the prior art.
(embodiment 1)
In above-mentioned fixing roller 1 as first embodiment of fixing roller involved in the present invention, the external diameter of plug 11 is 24mm, the external diameter of the center O in the direction of principal axis of elastic layer 12 is 52.35mm, external diameter b, the c of end L, R is 52.00mm, total length K is 318mm, and the normal cone ladder residual quantity Ht of each protuberance 13 of elastic layer 12 adds up to 0.75mm.
(embodiment 2)
In the fixing roller 1 of embodiment 1, the external diameter of the center O in the direction of principal axis of elastic layer 12 is 52.30mm, and external diameter b, the c of end L, R is 52.00mm, and the normal cone ladder residual quantity Ht of each protuberance 13 adds up to 0.50mm, and remaining formation is identical with embodiment 1.
(comparative example 1)
In the fixing roller 1 of embodiment 1, the external diameter of the center O in the direction of principal axis of elastic layer 12 is 52.10mm, and external diameter b, the c of end L, R is 52.00mm, and the normal cone ladder residual quantity Ht of each protuberance 13 adds up to 0.25mm, and remaining formation is identical with embodiment 1.
(comparative example 2)
In the fixing roller 1 of embodiment 1, the external diameter of the center O in the direction of principal axis of elastic layer 12 is 52.05mm, and external diameter b, the c of end L, R is 52.00mm, and the normal cone ladder residual quantity Ht of each protuberance 13 adds up to 0.10mm, and remaining formation is identical with embodiment 1.
(comparative example 3)
In the fixing roller 1 of embodiment 1, the external diameter of the center O in the direction of principal axis of elastic layer 12 is 52.00mm, external diameter b, the c of end L, R is 52.00mm, there is not protuberance 13, but form the external diameter homogeneous cylindric (be each protuberance 13 normal cone ladder residual quantity Ht add up to 0.00mm), remaining formation is identical with embodiment 1.
(comparative example 4)
Shown in Figure 11 (a) and (b), begin to two ends L, R from axial center O, be provided with a pair of normal cone face S symmetrically, in the fixing roller 901 of positive crown shape, the external diameter of the center O in the direction of principal axis of elastic layer 912 is 52.60mm, external diameter b, the c of end L, R is 52.00mm, and total length K is 318mm, and the normal cone ladder residual quantity Ht among the normal cone face S of fixing roller 901 is 0.60mm.Remaining formation is identical with embodiment 1.
(comparative example 5)
In the fixing roller 901 of comparative example 4, the external diameter of the center O in the direction of principal axis of elastic layer 912 is 52.50mm, and external diameter b, the c of end L, R is 52.00mm, and total length K is 318mm, and the normal cone ladder residual quantity Ht among the normal cone face S of fixing roller 901 is 0.50mm.Remaining formation is identical with comparative example 4.
After the fixing roller of these embodiment and comparative example is assembled into 116 li of fixing devices that above-mentioned image processing system 100 comprises respectively, carried out forming the test of the solid image of (passing through paper) 300,000 pages, come density unevenness (test 2), and confirm respectively by the deterioration (test 3) of the photographic fixing band behind the paper to the number of pages (test 1) that can pass through, formed image.
In test 1, be 300m/s when moving with the conveyance speed in the fixing device 116 with paper G, from the number of pages that can pass through, adopt following benchmark to come photographic fixing band 2 leaned on judging of phenomenon partially:
Zero can pass through 300,000 pages of paper
* can not pass through 300,000 pages of paper
Be meant the number of pages that to pass through in the bracket of table 1.
In test 2, for fixing roller do not have a weak state (the promptly initial solid image that forms), the benchmark below adopting is judged the density unevenness in the Width of photographic fixing band:
Zero does not have the density unevenness of the visual degree that can confirm
* density unevenness of the visual degree that can confirm arranged
Confirm the homogeneity of clamping part N from the density unevenness of this Width.
In test 3,, adopt following benchmark to judge for the photographic fixing band 2 of original state with by the distortion (extension) on the Width of 300,000 pages of later photographic fixing bands:
Zero does not have the distortion of the visual degree that can confirm
* distortion of the visual degree that can confirm arranged
From having or not this to be out of shape to confirm the deterioration of photographic fixing band.
Also have,, only implemented embodiment 1,2 and comparative example 4,5 for test 2,3.
The result of these tests is as shown in table 1.
Table 1
| Normal cone ladder | Test | 1 | |
|
|
| |
0.75mm | Zero (300,000 pages) | ○ | ○ | |
| |
0.50mm | Zero (300,000 pages) | ○ | ○ | |
| Comparative example 1 | 0.25mm | * (10,000 pages) | - | - | |
| Comparative example 2 | 0.10mm | * (500 pages) | - | - | |
| Comparative example 3 | 0.00mm | * (50 pages) | - | - | |
| Comparative example 4 | 0.60mm | Zero (300,000 pages) | × | × | |
| Comparative example 5 | 0.50mm | Zero (300,000 pages) | ○ | × |
By test 1 as can be known, fixing roller in fixing roller of the present invention and the prior art is all confirmed as follows: the total (the present invention) of normal cone ladder residual quantity Ht or normal cone ladder residual quantity Ht (prior art) are being set in 0.50mm when above, can both pass through 300,000 pages on paper, and the inclined to one side to phenomenon ( embodiment 1,2, comparative example 4,5) of photographic fixing band do not taken place.With respect to this, making the total of normal cone ladder residual quantity Ht less than resulting during partially by the value of preventing Hs (more than=0.50mm) by preliminary measurement, size corresponding to the total of normal cone ladder residual quantity Ht, the paper number of pages that can pass through reduces, that is to say, the inclined to one side to phenomenon (comparative example 1-3) of photographic fixing band just taken place in more early.
By test 2 as can be known, in fixing roller of the present invention, even set the total of normal cone ladder residual quantity Ht bigger, also can access the image that does not have density unevenness, in the Width of photographic fixing band, clamping part is (embodiment 1,2) that are formed uniformly.With respect to this, in the fixing roller of prior art, as long as the size of normal cone ladder residual quantity Ht suitably, just can obtain not have the image (comparative example 5) of density unevenness, and normal cone ladder residual quantity Ht is when increasing, density unevenness has just taken place in Width, and the formation of clamping part is uneven (comparative example 4).
By test 3 as can be known, in fixing roller of the present invention,, do not confirm yet, that is, can prevent the deterioration (embodiment 1,2) of photographic fixing band by the distortion in the photographic fixing band behind 300,000 page or leaf paper even set the total of normal cone ladder residual quantity Ht bigger.With respect to this, in the fixing roller of prior art, when setting normal cone ladder residual quantity Ht big, the distortion of photographic fixing band will take place, that is, and photographic fixing band deterioration (comparative example 4,5).
Result by these tests 1-3 can know, in fixing roller of the present invention, can prevent to lean on partially the generation of phenomenon, in addition, in the inhomogeneity while that can guarantee clamping part, can also prevent the deterioration of heated wheel band.
Also have, the present invention is not limited to above-mentioned embodiment.
From the above many improvement and variation can also be arranged, within the scope of the claims, the disclosure of this patent specification is not limited to above-mentioned explanation.
The basis of present patent application and priority request be on June 8th, 2010, at the Japanese patent application JP2010-130700 of Jap.P. office application, its full content draws the do combination at this.
Claims (7)
1. fixing roller that comprises the axle center and be arranged on the elastic layer cylindraceous in the surface in this axle center is characterized in that:
In the surface portion of described elastic layer, have in center one side on this elastic layer direction of principal axis for being a plurality of protuberance of low normal cone face in high, end one side, be axial center from described elastic layer begins continuously to the end, and be configuration symmetrically with this center
Then, it is predetermined partially by the value of preventing that these a plurality of protuberances are set to adding up to of normal cone ladder residual quantity in its described normal cone face separately.
2. fixing roller according to claim 1 is characterized in that:
Described normal cone face is set in the total length across its protuberance.
3. fixing roller according to claim 2 is characterized in that:
Described a plurality of protuberance is set at respectively, make that the described normal cone ladder residual quantity in the described normal cone face of this protuberance is identical, and the total length of this protuberance is identical.
4. fixing roller according to claim 1 is characterized in that:
Be provided with anti-circular conical surface in the protuberance of at least a portion in described a plurality of protuberance, center one side of its described elastic layer on direction of principal axis is that low, end one side is for high, described elastic layer is smaller than the length of elastic layer on direction of principal axis of described normal cone face in the length on the direction of principal axis
End face by described end one side in the described anti-circular conical surface is connected with this normal cone face, and by the other end of described center one side, the normal cone face of the protuberance of other that are provided with being adjacent to this protuberance is connected in the described anti-circular conical surface.
5. according to any one described fixing roller in the claim 1 to 4, it is characterized in that:
The height that described a plurality of protuberance is set to its top separately is from center one side of described elastic layer on direction of principal axis, slowly reduces to end one side.
6. fixing device, it comprises:
Fixing roller;
Open the heated wheel band of the ring-type of frame in described fixing roller;
By means of the backer roll of described heated wheel band and described fixing roller crimping,
It is characterized in that:
Described fixing roller is any one described fixing roller in the claim 1 to 5.
7. image processing system that comprises fixing device, it is characterized in that: described fixing device is the described fixing device of claim 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-130700 | 2010-06-08 | ||
| JP2010130700A JP2011257514A (en) | 2010-06-08 | 2010-06-08 | Fixing roller, fixing device having the same and image forming apparatus having the fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102279549A true CN102279549A (en) | 2011-12-14 |
| CN102279549B CN102279549B (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110144917.5A Expired - Fee Related CN102279549B (en) | 2010-06-08 | 2011-05-31 | Photographic fixing roller, fixing device and image forming device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011257514A (en) |
| CN (1) | CN102279549B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028431A (en) * | 2013-03-06 | 2014-09-10 | 住友橡胶工业株式会社 | Coating method and roller coating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002333789A (en) * | 2001-05-11 | 2002-11-22 | Ricoh Co Ltd | Fixing device and image forming device |
| JP2004226819A (en) * | 2003-01-24 | 2004-08-12 | Canon Inc | Heating device and image forming apparatus |
| CN1677272A (en) * | 2004-03-30 | 2005-10-05 | 佳能株式会社 | Picture heating device and delivering roll |
-
2010
- 2010-06-08 JP JP2010130700A patent/JP2011257514A/en not_active Withdrawn
-
2011
- 2011-05-31 CN CN201110144917.5A patent/CN102279549B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002333789A (en) * | 2001-05-11 | 2002-11-22 | Ricoh Co Ltd | Fixing device and image forming device |
| JP2004226819A (en) * | 2003-01-24 | 2004-08-12 | Canon Inc | Heating device and image forming apparatus |
| CN1677272A (en) * | 2004-03-30 | 2005-10-05 | 佳能株式会社 | Picture heating device and delivering roll |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028431A (en) * | 2013-03-06 | 2014-09-10 | 住友橡胶工业株式会社 | Coating method and roller coating device |
| CN104028431B (en) * | 2013-03-06 | 2018-02-06 | 住友橡胶工业株式会社 | Coating process and roll-on device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102279549B (en) | 2014-05-21 |
| JP2011257514A (en) | 2011-12-22 |
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