JP2003005559A - Fixing roller member and fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat ray absorption roller which is easily manufactured because it is hardly cracked by stress from both ends of translucent base sub stance in manufacturing. SOLUTION: This fixing roller member consists of the translucent base substance having translucency to a heat ray, a translucent elastic layer having translucency to the heat ray disposed on the outside of the translucent base substance, and a heat ray absorption layer. When an elastic member and a holding member for holding the translucent base substance through the elastic member are attached to both ends of the translucent base substance and the holding member is pressed in the shaft longitudinal direction of the translucent base substance, stress is not exerted from the inner surface of the translucent base substance to the outer circumference direction in part of the elastic member coming into contact with the leading end of the translucent base substance out of the elastic members. The fixing roller member is manufactured by molding by injecting liquid material for forming the translucent elastic layer into the space between the outer circumference of the translucent base substance and the inner surface of the molding metallic die or the heat ray absorption layer after installing at the specified position of the molding metallic die.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller member that can be used in image forming apparatuses such as copiers, printers and facsimiles, and a fixing device that uses this fixing roller member.

[0002]

2. Description of the Related Art As a fixing roller member, there is a fixing roller member in which a light-transmitting elastic layer and a heat ray absorbing layer are formed on the outer peripheral surface of a cylindrical light-transmitting substrate. The fixing roller member (also referred to as a heat ray absorbing roller) can bring the surface temperature to a fixable temperature within an extremely short time, and is particularly suitable for a color image forming apparatus. In this heat ray absorbing roller, elastic members and holding members for holding the transparent substrate via the elastic members are attached to both ends of the transparent substrate, and the holding members are pressed in the longitudinal direction of the shaft so that a predetermined position of the molding die is reached. It is known that a liquid material for forming a light-transmissive elastic layer is poured between the outer periphery of the light-transmissive substrate and the inner surface of the molding die or the heat-absorbing layer after being placed in Has been.

<Prior Art 2> As a heat ray absorbing roller,
There is a cylindrical light-transmitting substrate with a light-transmitting elastic layer and a heat ray absorbing layer formed on the outer peripheral surface, and the light-transmitting elastic layer is formed after the light-transmitting substrate is placed at a predetermined position of the molding die. It is known that a liquid material for this purpose is injected between the outer periphery of the translucent substrate and the inner surface of the molding die, and is manufactured by molding.

<Prior Art 3> As a heat ray absorbing roller,
There is a cylindrical transparent substrate having a transparent elastic layer formed on the outer peripheral surface thereof, and it is known that both ends of the transparent substrate are exposed.

<Prior Art 4> As a heat ray absorbing roller,
There is a cylindrical light-transmitting substrate with a light-transmitting elastic layer and a heat ray absorbing layer formed on the outer peripheral surface, and both ends of the light-transmitting substrate and both ends of the light-transmitting elastic layer and the heat ray absorbing layer in the axial direction. It is known that the department matches.

<Prior Art 5> As a fixing device, a fixing device using the heat ray absorbing roller (fixing roller member) as the fixing device is known.

[0007]

As a problem of <Prior Art 1>, when the holding member is pressed in the longitudinal direction of the shaft, the transparent member is brought into contact with the outermost end of the transparent substrate by the elastic member. A stress is applied to the outermost portion from the inner surface in the outermost direction, and, for example, the O-ring, which is an elastic member, is deformed by pressing in the axial longitudinal direction and enters the inner side of the light-transmitting substrate, so that the outermost end of the light-transmitting substrate is formed. There is a problem that a stress is applied to the portion in the direction of the outer peripheral surface rather than the inner surface, and the translucent substrate is easily cracked. A first object of the present invention is to provide a heat ray absorbing roller in which the translucent substrate does not break even when the holding member is pressed in the axial longitudinal direction.

As a problem of <Prior Art 2>, there is a problem that the cores of the light-transmitting substrate and the light-transmitting elastic layer are deviated from each other due to the cores of the mold and the light-transmitting substrate being displaced during molding. Second
It is an object of the invention to provide a heat ray absorbing roller in which the translucent substrate and the translucent elastic layer are not misaligned.

As a problem of <Prior Art 3>, there is a problem that both ends of the translucent substrate after fabrication are easily broken by impact or the like. A third object of the present invention is to provide a heat ray absorbing roller in which both ends of a translucent substrate are protected.

As a problem of <Prior Art 4>, there is a problem that the heat ray absorbing roller is easily scratched and is easily rolled. A fourth object of the present invention is to provide a heat ray absorbing roller which is hard to be scratched when placed and which is hard to roll.

As a problem of <Prior Art 5>, there is provided a fixing device using a heat ray absorbing roller including the above problems. A fifth object of the present invention is to provide a fixing device using the improved heat ray absorbing roller of the present invention.

[0012]

The first invention can be achieved by any of the following means.

(1) A cylindrical light-transmitting substrate having a light-transmitting property with respect to heat rays, and a cylindrical light-transmitting elastic layer having a light-transmitting property with respect to the heat rays outside the light-transmitting substrate. And a fixing roller member composed of a heat ray absorbing layer that absorbs the heat rays on the outer side of the light transmitting elastic layer, wherein the light transmitting substrate is provided on both ends of the light transmitting substrate via the elastic member and the elastic member. When a holding member for holding is attached and the holding member is pressed in the axial longitudinal direction of the transparent base, the elastic member of the elastic members that is in contact with the outermost end of the transparent base is transparent. The structure is such that no stress is applied from the inner surface of the transparent substrate to the outer circumferential direction, and the liquid material for forming the light-transmitting elastic layer is placed on the outer periphery of the light-transmitting substrate and the molding after being placed at a predetermined position of the molding die. It is injected into the inner surface of the mold or between the heat ray absorbing layer and by molding. Fixing roller member, characterized in that the manufacturing.

(2) A cylindrical light-transmitting substrate having a light-transmitting property with respect to heat rays, and a cylindrical light-transmitting elastic layer having a light-transmitting property with respect to the heat rays on the outer side of the light-transmitting substrate. And a fixing roller member composed of a heat ray absorbing layer that absorbs the heat rays on the outer side of the light transmitting elastic layer, holding members for holding the light transmitting body are attached to both ends of the light transmitting body, and A through shaft for restricting the position of the holding member is attached, and a stress is not applied in the axial direction of the transparent base,
After being installed in a predetermined position of the molding die, a liquid material for forming the light-transmitting elastic layer is injected between the outer periphery of the light-transmitting substrate and the inner surface of the molding die or the heat ray absorbing layer. The fixing roller member is manufactured by molding.

The second invention can be achieved by the following means. (3) A cylindrical light-transmitting substrate having a light-transmitting property with respect to a heat ray, a cylindrical light-transmitting elastic layer having a light-transmitting property with respect to the heat ray on the outer side of the light-transmitting substrate, In a fixing roller member composed of a heat ray absorbing layer that absorbs the heat rays outside the light transmitting elastic layer, a positioning member that is held by the outer peripheral surface of the light transmitting substrate is attached, and the outer peripheral surface of the positioning member is a molding die. The liquid material for forming the light-transmitting elastic layer is formed on the inner surface or the outer periphery of the light-transmitting elastic layer so as to be fitted with the heat ray absorbing layer, and is placed at a predetermined position of the molding die. A fixing roller member, characterized in that the fixing roller member is produced by injecting it between the outer periphery of the optical substrate and the inner surface of the molding die or the heat ray absorbing layer.

The third invention can be achieved by any of the following means. (4) A cylindrical light-transmitting substrate having a light-transmitting property with respect to a heat ray, a cylindrical light-transmitting elastic layer having a light-transmitting property with respect to the heat ray on the outer side of the light-transmitting substrate, In order to form the light-transmitting elastic layer after the light-transmitting substrate is installed at a predetermined position of a molding die in a fixing roller member composed of a heat-ray absorbing layer that absorbs the heat rays outside the light-transmitting elastic layer. The liquid material is injected between the outer periphery of the transparent substrate and the inner surface of the molding die or the heat ray absorbing layer, and then the transparent substrate is formed in the vicinity of both ends of the transparent substrate. A fixing roller member manufactured by providing cap members for protecting both ends of the fixing roller member.

(5) A cylindrical light-transmitting substrate having a light-transmitting property with respect to heat rays, and a cylindrical light-transmitting elastic layer having a light-transmitting property with respect to the heat rays outside the light-transmitting substrate. And a fixing roller member composed of a heat ray absorbing layer that absorbs the heat ray outside the light transmitting elastic layer, wherein both ends of the light transmitting substrate in the axial longitudinal direction are protected by elastic cover members. Fixing roller member.

The fourth invention can be achieved by any of the following means. (6) A cylindrical light-transmitting substrate having a light-transmitting property with respect to heat rays, a cylindrical light-transmitting elastic layer having a light-transmitting property with respect to the heat rays, which is provided outside the light-transmitting substrate. In a fixing roller member formed of a heat ray absorbing layer that absorbs the heat rays on the outer side of the light transmitting elastic layer, the light transmitting elastic layer is formed on the outer peripheral surface of the light transmitting base at both end portions in the axial longitudinal direction. A fixing roller member, which is protected by a cap member or an elastic covering member having a diameter larger than the outer diameter of the transparent elastic layer.

(7) Cylindrical translucent substrate having translucency to heat rays, and a cylindrical translucent elastic layer having translucency to the heat rays outside the translucent substrate. And a heat-absorbing layer for absorbing the heat rays on the outer side of the light-transmitting elastic layer, wherein at least one end in the longitudinal direction of the shaft in which the light-transmitting elastic layer is formed on the outer peripheral surface of the light-transmitting substrate. A fixing roller member, characterized in that a convex member or a surface member for preventing the fixing roller member from rolling is provided in the portion.

The fifth invention can be achieved by the following means. (8) A fixing device using the fixing roller member according to any one of (1) to (7).

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION First, an image forming apparatus to which a fixing roller member (also called a heat ray absorbing roller) and a fixing device of the present invention are applied will be described. FIG. 1 is a schematic cross-sectional view showing the configuration of an image forming apparatus including a color printer.

In FIG. 1, 10 is a photosensitive drum (hereinafter also simply referred to as drum) which is an image forming body, 11 is a scorotron charger which is a charging means for each color, and 12 is an image writing means for each color. An exposure optical system, 13 is a developing device that is a developing unit for each color, and 14 is a transfer belt.

The drum 10 is, for example, a photosensitive member such as a transparent conductive layer, an a-Si layer or an organic photosensitive layer (OPC) on the outer periphery of a cylindrical substrate formed of a transparent member such as optical glass or transparent acrylic resin. A layer (also referred to as a photoconductive layer) is formed, and the conductive layer is rotated in the clockwise direction indicated by the arrow in FIG. 1 with the conductive layer being grounded.

The scorotron charger 11, which is the charging means for each color, the exposure optical system 12, which is the image writing means for each color, and the developing device 13, which is the developing means for each color, make up a set of yellow (Y ), Magenta (M), cyan (C), and black (K) image forming processes, four sets are provided, and the photosensitive drum 1 indicated by an arrow in FIG.
With respect to the rotation direction of 0, they are arranged in the order of Y, M, C and K.

The scorotron charger 11 which is a charging means for each color has a control grid which is held at a predetermined potential and a discharge electrode 11a which is, for example, a sawtooth electrode, and faces the photosensitive layer of the drum 10. The toner is charged by corona discharge having the same polarity as the toner, and a uniform potential is given to the photoconductor drum 10.

Exposure optical system 1 which is an image writing means for each color
No. 2 is arranged inside the drum 10 such that the exposure position on the drum 10 is located on the downstream side in the rotational direction of the photoconductor drum 10 with respect to the scorotron charger 11 for each color.

Each of the exposure optical systems 12 is a linear exposure element 12a in which a plurality of LEDs (light emitting diodes) as light emitting elements for image exposure light arranged in the main scanning direction in parallel with the drum axis are arranged in an array. And a light converging light transmission body as an imaging element (trade name: SELFOC lens array (R))
The exposure unit 12b and a lens holder (not shown) are attached to the holding member 120.

The holding member 120 has an exposure optical system 1 for each color.
2, the transfer simultaneous exposure device 12d and the uniform exposure device 12
e is attached and integrally housed inside the base of the drum 10.

The exposure optical system 12 for each color imagewise exposes the photosensitive layer of the drum 10 from the back side according to the image data of each color read by a separate image reading device and stored in the memory, and electrostatically deposits on the drum 10. Form a latent image.

As the exposure element 12a, in addition to the LED, F
It is also possible to use a plurality of light emitting elements such as L (fluorescent substance light emission), EL (electroluminescence), PL (plasma discharge) arranged in an array.

The light emitting wavelength of the exposure element is usually in the range of 780 to 900 nm, which has high transparency to Y, M, and C toners, but in the present embodiment, image exposure is performed from the back surface. 400 to 780 nm shorter than this, which does not have sufficient transparency for color toner.
May be the wavelength of.

The developing device 13, which is a developing means for each color, maintains a predetermined gap with respect to the peripheral surface of the drum 10, and
Developing sleeve 13 made of cylindrical non-magnetic stainless steel or aluminum that rotates in the forward direction of 0
1 and a developing casing 138. Inside the developing casing 138, one component or two component developers of yellow (Y), magenta (M), cyan (C) and black (K) are contained. ing.

Each developing unit 13 is kept in non-contact with the drum 10 with a predetermined gap therebetween, and the developing sleeve 1
By applying a developing bias in which a DC voltage and an AC voltage are superposed to 31, a non-contact reversal development is performed, and a superposed toner image is formed on the drum 10. 14a
Rollers 14 and 14b stretch the transfer belt 14, and are configured so that 14a receives power from a drive source (not shown) to rotate the transfer belt in the arrow direction.

Reference numerals 15 and 16 are first and second transfer means and a static eliminator which are arranged to face the drum 10 with the transfer belt 14 sandwiched therebetween, and 17 is used to neutralize the drum 10 after the completion of the transfer process. The AC static eliminator, 18 is a cleaning device for cleaning the drum surface after the static elimination, and has a cleaning blade 180. Reference numeral 20 is a cassette that stores the paper P on which the toner image formed on the drum 10 is transferred, and 25 is a paper feed roller.

A transport roller pair R1 is provided on the moving path of the paper P.
Through R5, a transfer belt 14, a heat roller type fixing device (hereinafter, also simply referred to as a fixing device) 300, and the like are attached.

Reference numeral 71 denotes an AC static eliminator for separating the sheet, which is arranged to face the roller 14a via the transfer belt 14.

The fixing device 300 has a halogen heater (halogen lamp) 301 built therein, and a heat ray absorbing roller (also referred to as a fixing roller member) capable of rotating around the halogen heater.
The fixing roller unit 305 that includes a pressure roller 30 and the pressure contact roller unit 316 that includes the heater 302 and the pressure contact roller unit 315. T indicates a nip portion.

In the figure, 72 is the transfer belt 14
A separation claw for surely separating the paper P after transfer, which is fed integrally with the paper, has its tip positioned close to the surface of the transfer belt 14 on the roller 14a.

The image forming process in the image forming apparatus having the above structure is as follows.

A drum drive motor (not shown) is started by the start of image formation, and the drum 10 is rotated in the clockwise direction shown by the arrow in FIG. 1, and at the same time, the yellow (Y) scorotron charger 11 is operated to cause the drum 10 to rotate. Apply a predetermined potential.

Subsequently, the image writing by the first color signal, that is, the electric signal corresponding to the Y image data is started via the Y exposure optical system 12, and the surface of the drum 10 corresponds to the Y image of the original image. Electrostatic latent image is formed. The electrostatic latent image is reversely developed by the Y developing device 13 in a non-contact state, and a yellow (Y) toner image is formed on the drum 10.

Then, a potential is applied to the drum 10 from above the Y toner image by the charging action of the magenta (M) scorotron charger 11, and the exposure optical system 12 of M causes a second color signal, that is, M. The electrostatic latent image corresponding to the image of M is formed by the image writing by the electric signal corresponding to the image data of M, and the non-contact reversal development by the developing device 13 of M causes the electrostatic latent image to be formed on the yellow (Y) toner image. A magenta (M) toner image is formed in an overlapping manner.

By a similar process, the cyan (C) toner image of cyan (C) corresponding to the third color signal is superposed by the cyan (C) scorotron charger 11, the exposure optical system 12 of C and the developing device 13 of C. Formed thereon, and a black (K) toner image corresponding to the fourth color signal is successively superposed thereon by a black (K) scorotron charger 11, an exposure optical system 12 of K and a developing device 13 of K. And the four color toner images of yellow (Y), magenta (M), cyan (C) and black (K) are formed on the peripheral surface of the photosensitive drum 10 within one rotation. .

Exposure optical system 1 for these Y, M, C and K
The image writing on the photosensitive layer of the drum 10 by 2 is performed from the inside of the drum 10 through the above-mentioned light-transmitting substrate. Therefore, the writing of the image corresponding to the second, third and fourth color signals is performed without any influence of the toner image previously formed, and is equivalent to the image corresponding to the first color signal. It is possible to form an electrostatic latent image of.

The superimposed color toner images formed on the drum 10 as an image forming body by the above image forming process are collectively transferred onto the paper P by the transfer device 15 in the transfer area. At this time, the simultaneous transfer / exposure device 12 provided inside the drum 10 so that good transfer can be performed.
Uniform exposure is performed by energizing d. The toner remaining on the peripheral surface of the drum 10 after the completion of the transfer process is neutralized by the AC static eliminator 17 and then cleaned by the cleaning device 18, whereby the drum surface is prepared for the next image formation. In the embodiment, after the cleaning and before the next charging, the uniform exposure device 12e using, for example, a light emitting diode is operated to eliminate the history of the image formation on the drum surface.

The paper P on which the color toner image is formed is A
By the static eliminating action of the C static eliminator 71 and the separation claw 72,
It is separated from the transfer belt 14 and conveyed to the fixing device 300, where the toner image is fixed on the paper P. The recording paper P on which double-sided image recording has been performed is fed with its front and back reversed, and is ejected to the tray on the upper side of the apparatus via the pair of conveying rollers R3, R4 and R5.

The color image forming apparatus has been described as the embodiment of the image forming apparatus in which the fixing device including the heat ray absorbing roller according to the present invention is used. However, the present invention is not limited to this and a monochrome image forming apparatus is used. It is also applied to the image forming apparatus.

FIG. 2 is a side sectional view showing the structure of the main part of the fixing device. In FIG. 2, the fixing device includes a fixing roller unit 30.
5, the pressure contact roller portion 315 and the like. The fixing roller unit 305 includes a heat ray absorbing roller 30 and a halogen heater 3.
01, and the pressure contact roller portion 315 includes a pressure contact roller portion 316 and a halogen heater 302.

The heat ray absorbing roller 30 includes a light-transmitting substrate 30a which is a cylindrical roller core, and a light-transmitting elastic layer 30b such as a transparent silicon rubber layer provided on the outer side (outer peripheral surface) of the light-transmitting substrate 30a. Further, it has a PFA (fluorine resin) tube mixed with carbon black or the like provided as a heat ray absorbing layer 30c on the outside thereof.

FIG. 2 shows the structure of the heat ray absorbing roller 30.
This will be described in more detail with reference to the cross section shown in FIG. The translucent substrate 30a has a thickness of 1 to 10 mm, preferably 2 to
Halogen lamp 30 having a thickness of 5 mm and serving as a heat ray irradiation means
Pyrex (R) glass, sapphire (Al ₂ O ₃ ), Ca that transmits heat rays such as infrared rays or far infrared rays from 1
Ceramic material such as F ₂ (heat conductivity is (5 to 20) × 10
^-3 J / cm · s · K, specific heat is (0.5 to 2.0) × J /
g · K and specific gravity of 1.5 to 3.0) are mainly used. Translucent resin using polyimide, polyamide, etc. (heat conductivity is (2-4) × 10 ^-3 J / cm · s · K, specific heat is (1-2) × J / g · K, specific gravity is 0 .8-1.2)
Etc. can also be used. For example, the heat ray absorbing roller 3
As a transparent substrate 30a of 0, an inner diameter of 32 mm and an outer diameter of 40
A-3 size width of the light-transmissive substrate 30a when using Pyrex (R) glass (specific heat: 0.78 J / g · K, specific gravity: 2.32) having a thickness of 4 mm and a layer thickness (thickness) of 4 mm ( 297
The heat capacity Q1 per mm) is about 240 J / deg. As described above, the translucent substrate 30a does not have very good thermal conductivity.

Next, the transparent elastic layer 30b has a thickness of 1 to 1.
A silicon rubber layer or a fluororubber layer (base layer) having a thickness of 0 mm, preferably 2 to 5 mm, for example, a silicon rubber or a fluororubber, which is transparent to a heat ray (infrared ray or far infrared ray including visible light depending on a light source) and which transmits a heat ray. ) Is formed. In order to increase the speed of the light-transmitting elastic layer 30b, a method of incorporating a powder of a metal oxide such as silica, alumina, or magnesium oxide as a filler into the base layer to improve the thermal conductivity is used. Rate is (1-3) ×
10 ⁻³ J / cm · s · K, specific heat is (1-2) × J / g ·
A silicon rubber layer or a fluororubber layer having K and a specific gravity of 0.9 to 1.0 is used. For example, the translucent elastic layer 30b of the heat ray absorbing roller 30 has an outer diameter of 48 mm and a layer thickness (thickness) of 4 mm.
Silicone rubber (specific heat 1.1 J / gK, specific gravity 0.
91), the heat capacity Q2 per A-3 size width (297 mm) of the translucent elastic layer 30b is about 160 J.
/ Deg. Since the silicon rubber layer and the fluororubber layer have a lower thermal conductivity than the light-transmitting substrate 30a (the thermal conductivity is (5 to 20) × 10 ⁻³ J / cm · s · K) using the glass member, the heat insulating property is obtained. Serve as a layer. Generally, increasing the thermal conductivity tends to increase the rubber hardness, for example, usually 30 Hs.
However, the value of the product increases to nearly 50 Hs (JIS, A rubber hardness). The rubber hardness of the transparent elastic layer 30b is preferably 5 to 30 Hs. Most of the transparent elastic layer 30b of the heat ray fixing rotary member is occupied by this base layer, and the amount of compression at the time of pressurization is determined by the rubber hardness of the base layer. The intermediate layer of the translucent elastic layer 30b is made of a fluorine-based rubber, preferably 20 to 300 μm, as an oil resistant layer for preventing oil swelling.
Painted in the thickness of. Further, since the wavelength of the heat ray passing through the light-transmitting elastic layer 30b is 0.1 to 20 μm, preferably 0.3 to 3 μm, the filler used as the hardness or thermal conductivity modifier described above is The average particle size including primary and secondary particles having a particle size of 1/2, preferably 1/5 or less, of the wavelength of heat rays is 1 μm or less, preferably 0.1 μm.
The following fine particles of metal oxides such as titanium oxide, aluminum oxide, zinc oxide, silicon oxide, magnesium oxide, calcium carbonate, etc., having heat ray transparency (infrared or far infrared ray transparency including visible light depending on the light source) are used as the resin binder. The transparent elastic layer 30b may be formed of a dispersed material. In the layer, it is preferable that the average particle size including primary and secondary particles is 1 μm or less, preferably 0.1 μm or less in order to prevent light scattering and reach the heat ray absorbing layer 30c. By providing the transparent elastic layer 30b, the heat ray absorbing roller 30 as the heat ray fixing rotating member is configured as a soft roller having high elasticity.

Further, as the heat ray absorbing layer 30c, the remaining heat ray emitted from the halogen lamp 301 and absorbed by the light transmitting substrate 30a and the light transmitting elastic layer 30b is used to transmit the light transmitting substrate 30a and the light transmitting property. 90 to 100%, preferably 95 to 100, which is approximately 100% of the heat rays transmitted through the elastic layer 30b.
Carbon black, graphite, iron black (Fe ₃ O ₄ ), various ferrites and their compounds, and copper oxide are used as the resin binder so that 100% of the heat rays are absorbed by the heat ray absorbing layer 30c to form a rotating member capable of rapid heating. A heat ray absorbing member mixed with powder of cobalt oxide, red iron oxide (Fe ₂ O ₃ ) or the like is used. It is formed by a PFA (fluorine resin) tube mixed with the heat ray absorbing member and the like. Further, the heat ray absorbing member having a thickness of 10 to 500 μm, preferably 20 to 100 μm is provided outside the light-transmitting elastic layer 30b (outer peripheral surface).
It can also be formed by spraying or coating. The heat conductivity of the heat ray absorbing layer 30c is determined by adding an absorbent such as carbon black to the base layer (heat conductivity of (1 to 10) × 10 ⁻³ J / cm · s. K)
Higher than (3-100) x 10 ^-3 J / cm · s ·
Can be set to K. The specific heat of the heat ray absorbing layer 30c is preferably (˜2.0) × J / g · K. Heat ray absorption layer 30
As c, a metal roller member such as a nickel electroformed roller may be provided with the same thickness. When the heat ray absorption rate of the heat ray absorbing layer 30c is lower than about 90%, for example, about 20 to 80%, the heat ray leaks, and the leaked heat ray is used by the heat ray absorbing roller 30 as a rotating member for monochrome image formation. In this case, when black toner adheres to the surface of the heat ray absorbing roller 30 at a specific position due to filming or the like, heat is generated from the adhered portion due to the leaked heat ray. fall into disrepair. Further, when used for forming a color image, the absorption efficiency of color toner is generally low, and there is a difference in absorption efficiency between color toners, resulting in defective fixing or uneven fixing. Therefore, the remaining heat rays emitted from the halogen lamp 301 and absorbed by the light-transmitting substrate 30a and the light-transmitting elastic layer 30b are absorbed by the heat rays passing through the light-transmitting substrate 30a and the light-transmitting elastic layer 30b. The heat ray absorption rate of the heat ray absorption layer 30c is set to 90 to 100%, preferably 95 to 100%, which is approximately 100%, so that the layer 30c is completely absorbed.
When the thickness of the heat ray absorbing layer 30c is less than 10 μm and thin, the heating rate due to absorption of heat rays by the heat ray absorbing layer 30c is high, but the heat ray absorbing layer 30 due to local heating by the thin film.
If the thickness of the heat ray absorbing layer 30c exceeds 500 μm and causes damage to c or insufficient strength, heat conduction becomes poor, or the heat capacity becomes large, making rapid heating difficult. The heat ray absorption rate of the heat ray absorbing layer 30c is 90 to 100%, preferably 95 to 100%, which is approximately 100%, or the thickness of the heat ray absorbing layer 30c is 10 to 500 µm, preferably 20 to 100 µm. Local heat generation in the absorption layer 30c is prevented, and uniform heat generation is performed. Further, since the wavelength of the heat ray projected onto the heat ray absorbing layer 30c is 0.1 to 20 μm, preferably 0.3 to 3 μm, a hardness or thermal conductivity modifier is added as a filler, but the particle size is 1/2 of the wavelength of heat rays, preferably 1/5
Titanium oxide having an average particle size including primary and secondary particles of 1 μm or less, preferably 0.1 μm or less (transparent to infrared rays or far infrared rays including visible light depending on the light source) and oxidized. The heat ray absorbing layer 30c may be formed by dispersing fine particles of a metal oxide such as aluminum, zinc oxide, silicon oxide, magnesium oxide, or calcium carbonate in a resin binder in an amount of 5 to 50% by mass. This way
Heat rays can be introduced into the heat ray absorbing layer 30c to prevent heat generation at the interface. In this way, the heat ray absorbing layer 30c
Since the heat capacity is reduced so that the temperature rises immediately, the problem that the temperature of the heat ray absorbing roller 30 as a rotating member is lowered and the fixing unevenness occurs is prevented. As the heat ray absorbing layer 30c, elastic silicon rubber or fluororubber, carbon black, graphite, iron black (Fe
₃ O ₄ ), various ferrites and their compounds, powders of copper oxide, cobalt oxide, red iron oxide (Fe ₂ O ₃ ) and the like may be mixed.

As a modified example of the heat ray absorbing layer, a PFA (fluorine resin) tube having a thickness of 20 to 100 μm is coated on the outer peripheral surface of the heat ray absorbing layer 30c in order to improve the separation from the toner. Fluorine resin (PFA or PT
FE) paint applied 20 to 100 μm, layer thickness 2
It is also possible to provide a molded product of silicon rubber or fluororubber of 0 to 500 μm.

The pressure contact roller portion 315 includes, for example, a cylindrical metal pipe 316a made of aluminum and a metal pipe 3
On the outer peripheral surface of 16a, for example, a silicon rubber layer 317b is formed.

Heat ray absorbing roller 30 and pressure contact roller 31
6 is brought into pressure contact (close contact) with a predetermined pressure, and rotates in the same direction in the nip portion T while maintaining the pressure contact state at the time of operation, and melts and fixes the unfixed toner by heating and pressurizing. The heat ray absorbing roller 30 is provided on the side of the paper P that comes into contact with the unfixed toner image.

(First Embodiment) FIG. 3 is a cross-sectional view showing the essential structure of the heat ray absorbing roller of the first invention. As shown in FIG. 3, in the heat ray absorbing roller 31 of the present invention, a light transmitting elastic layer 31b and a heat ray absorbing layer 31c are formed on the outer peripheral surface of a cylindrical light transmitting substrate 31a. In the fixing device of the present invention, the heat ray absorbing roller 31 is applied to the fixing roller portion 305 shown in FIG.

The heat ray absorbing roller 31 is manufactured by the following manufacturing method. FIG. 4 is a sectional view of an essential part of a molding die during manufacturing of the heat ray absorbing roller of the first invention. Both ends are symmetrical and only one side will be described. As shown in FIG. 4, holding members 43 for holding the transparent base 31a are attached to both ends of the transparent base 31a via ring-shaped O-rings 44 which are elastic members. The transparent substrate 31
The inner diameter of a is positioned by another O-ring 45 provided on the holding member 43. Further, the holding members 43 at both ends are reduced in inclination by inserting the cylindrical through shafts 49. Next, PF which is the heat ray absorbing layer 31c in advance
The A tube is attached to a predetermined position of the molding die 41 attached to the inner surface, and further, the holding member 43 is attached with the flange 42 which is fitted to the holding member 43, and is pressed in the axial direction of the arrow 61 to transmit the light-transmitting elastic layer. A liquid material for forming 31b is injected from a direction of an arrow 62 through a hole 42a provided in the flange 42 between the outer periphery of the transparent base 31a and the inner surface of the molding die 41 to mold. The hole 42a is not formed in the flange 42 on the opposite side (not shown), and the liquid material is injected only from one end portion shown. After that, the transparent elastic layer 31b and the heat ray absorbing layer 31c at both ends are cut at the position CT to produce the heat ray absorbing roller 31. The relationship between the O-ring 44 and the transparent base 31a is as follows. When the inner diameter of the transparent base 31a is A, the outer diameter of the O-ring 44 is B ₁ , and the outer diameter of the elastic member is B ₂ , (B ₁ + B ₂ )
/ 2> A is satisfied. Thus, when the transparent base 31a is pressed by the flange 42 in the axial direction of the arrow 61 via the O-ring 44, a part of the O-ring 44 also digs into the inner surface of the end of the transparent base 31a. As a result, no stress is applied in the direction of expansion in the outer peripheral direction. The light-transmissive substrate 31a is most vulnerable to stress (particularly tensile stress) at its end, and it is necessary to reduce this stress. (B ₁
If the relationship of + B ₂ ) / 2> A is not satisfied, the transparent substrate 3
Stress is applied in the outer peripheral direction from the inner surface side of the end portion of 1a, and cracking easily occurs.

With the above-described structure, the heat ray absorbing roller 31 of the present invention is a roller that is easy to produce because cracks due to stress from both ends of the transparent substrate 31a are less likely to occur during production.

(Second Embodiment) Another heat ray absorbing roller of the first invention is mechanically the same as the heat ray absorbing roller except that the manufacturing method is different from that of FIG. 3 shown in the first embodiment. Forms a transparent elastic layer and a heat ray absorbing layer on the outer peripheral surface of a cylindrical transparent substrate. The fixing device of the present invention is one in which this heat ray absorbing roller is applied to the heat ray absorbing roller shown in FIG.

This heat ray absorbing roller is manufactured by the following manufacturing method. FIG. 5 is a sectional view of an essential part of a molding die during manufacturing of another heat ray absorbing roller of the first invention. In addition,
Since both ends are symmetrical, only one side will be described. As shown in FIG. 5, holding members 48 for holding the transparent base 32a are attached to both ends of the transparent base 32a via ring-shaped O-rings 44 which are elastic members. The transparent base 3
The inner diameter of 2a is positioned by another O-ring 45 provided on the holding member. Next, the threaded portion 46a at the tip of the through shaft 46 is screw-fitted to the threaded portion 48a provided at the holding member 48 so that the positional relationship between the holding members 48 at both ends is accurately determined. Next, the PFA tube that is the heat ray absorbing layer 32c is attached in advance to a predetermined position of the molding die 41 attached to the inner surface, and further, the holding member 48 is attached with the flange 42 that fits into the holding member 48, and the axial length of the arrow 61 is shown. The liquid material for forming the light-transmitting elastic layer by pressing in the direction of the light-transmitting substrate 32a.
Is injected from a direction indicated by an arrow 62 through a hole 42a provided in the flange 42 between the outer periphery of and the inner surface of the molding die 41 to mold the transparent elastic layer 32b. The hole 42a is not formed in the flange 42 on the opposite side (not shown), and the liquid material is injected only from one end portion shown. After that, the translucent elastic layer 32b and the heat ray absorbing layer 32c at both ends are placed at the position CT.
And cut to prepare a heat ray absorbing roller. It should be noted that in order to prevent leakage between the flange 42 and the holding member 48 at the time of injecting the liquid material for forming the light-transmitting elastic layer, even if the through shaft 46 and the holding member are pressed in the axial direction of the arrow 61, the through shaft 46 and the holding member are not pressed. Since 42 is positioned in the position axis direction in the longitudinal axis direction of the translucent base body 32a by the screw portion, the translucent base body 32a does not exert an unreasonable force in the longitudinal axis direction of the translucent base body 32a. It is structured.

With the above structure, the heat ray absorbing roller of the present invention is a roller which is less likely to be cracked by stress from both ends of the light transmissive substrate at the time of manufacturing and is easy to manufacture.

(Third Embodiment) The structure of the heat ray absorbing roller of the second invention is mechanically the same as that of FIG. 4 shown in the first embodiment except that the manufacturing method is different. In this heat ray absorbing roller, a light transmitting elastic layer and a heat ray absorbing layer are formed on the outer peripheral surface of a cylindrical light transmitting substrate. The fixing device of the present invention is one in which this heat ray absorbing roller is applied to the heat ray absorbing roller shown in FIG.

This heat ray absorbing roller is manufactured by the following manufacturing method. FIG. 6 is a cross-sectional view of a main part of a molding die during manufacturing the heat ray absorbing roller of the second invention, FIG. 8A is a perspective view of a main part of a positioning member, and FIG. 8B is a view of another positioning member. FIG. Both ends are symmetrical and only one side will be described. As shown in FIG. 6, holding members 43 for holding the transparent base 33a are attached to both ends of the transparent base 33a via ring-shaped O-rings 44 which are elastic members. The inner diameter of the transparent base 33a is positioned by another O-ring 45 provided on the holding member 43. Next, the inner diameter of the positioning member 47 and the outer circumference of the transparent base 33a are fitted together,
Further, the inner surface of the molding die 41 and the outer periphery of the positioning member 47 are fitted together. The material of the positioning member 47 is a rubber material, and the positioning member 47 is arranged in the vicinity of both ends of the translucent base body 33a in the axial direction.
The positioning member 47 has three legs 47a, 47b, 47c as shown in FIG. 8 (a). The radial thickness of the positioning member 47 is substantially the same as the radial thickness of the transparent elastic layer 33b, and the hardness of the positioning member 47 is higher than the hardness of the transparent elastic layer 33b.
The material of is the same as the material of the transparent elastic layer 33b.

Next, PFA, which is the heat ray absorbing layer 33c in advance, is used.
The tube is attached to a predetermined position of the molding die 41 attached to the inner surface, the holding member 43 is attached to the flange 42 which is fitted to the holding member, and is pressed in the axial direction of the arrow 61,
The liquid material for forming the light-transmitting elastic layer is used as the light-transmitting substrate 3.
A flange 42 is provided between the outer periphery of 3a and the inner surface of the molding die 41.
The transparent elastic layer 33b is formed by injecting from the hole 42a provided in the direction of arrow 62. After that, the light-transmitting elastic layer 33b and the heat ray absorbing layer 33c at both ends are cut at the position CT to produce the heat ray absorbing roller 33. After the cutting, a part of the foot portion of the positioning member 47 remains on the heat ray absorbing roller side.

The positioning member may be the positioning member 47A shown in FIG. 8B, which has an elastic member 47Aa on the inner side.

FIG. 7 is a cross-sectional view of a main part of a molding die during manufacture of another heat ray absorbing roller of the second invention. If the positioning member 47 or 47A having the shape shown in FIG.
The heat-absorbing roller 33 also has the function of the O-ring 44 shown in FIG.
It can also have the function of protecting the end of a.

With the above structure, the heat ray absorbing roller of the present invention has a good coaxiality between the light-transmitting substrate and the light-transmitting elastic layer at the time of manufacture, that is, a roller having less uneven thickness of the light-transmitting elastic layer.

(Fourth Embodiment) FIG. 9 is a (a) side view and a (b) front sectional view showing the construction of the essential part of the heat ray absorbing roller of the third invention. As shown in FIG. 9, the heat ray absorbing roller 34 of the third invention is a cylindrical light-transmitting substrate 34a.
The transparent elastic layer 34b, the heat ray absorbing layer 34c, and the cap member 52 are provided on the outer peripheral surface of the heat ray absorbing roller 34.
Cap members 52 with slits are press-fitted into both ends of the transparent base 34a. The fixing device of the present invention is one in which this heat ray absorbing roller is applied to the heat ray absorbing roller shown in FIG.

The outer diameter of the cap member 52 is the transparent elastic layer 3
The outer diameter of the cap member 52 is substantially the same as the outer diameter of 4b, and at least the portion of the cap member 52 that comes into contact with the transparent base 34a is a rubber material, and the hardness of the rubber material is higher than the hardness of the transparent elastic layer 34b. Further, the material of the cap member 52 is the translucent elastic layer 3.
It is the same as the material of 4b. Further, the cap member 52 may be adhered to the translucent substrate 34a. The heat ray absorbing roller 34 is manufactured by the manufacturing method described in the first embodiment, and has cap members 52 with slits attached to both ends thereof.

With the above structure, the heat ray absorbing roller of the present invention is provided with the cap portions at both ends of the light-transmitting substrate, so that the both ends of the light-transmitting substrate can be prevented from being damaged.

(Fifth Embodiment) FIG. 10 is a front sectional view showing a structure of a main part of another heat ray absorbing roller of the third invention. As shown in FIG. 10, another heat ray absorbing roller 35 of the third invention comprises a light transmitting elastic layer 35b, a heat ray absorbing layer 35c on the outer peripheral surface of a cylindrical light transmitting base 35a, and elastic portions on both ends. As a covering member, a rubber material 58 of silicon rubber is applied and configured. This heat ray absorbing roller manufacturing method is one in which the rubber material is applied after molding in the first embodiment.

Further, another heat ray absorbing roller of the present invention will be described. FIG. 11 is a front sectional view showing the structure of the essential part of another heat ray absorbing roller of the third invention. As shown in FIG. 11, the heat ray absorbing roller 36 of the present invention comprises a light transmitting elastic layer 36b and a heat ray absorbing layer 36c on the outer peripheral surface of a cylindrical light transmitting substrate 36a, and silicone rubber as elastic covering members at both ends. A rubber ring 54 is bonded and configured. The method of manufacturing the heat ray absorbing roller is the one in which the rubber ring is bonded after molding in the first embodiment.

As described above, since the exposed ends of the translucent base in the axial direction are covered with the elastic material, the ends of the heat ray absorbing roller can be prevented from being damaged by physical impact.

(Sixth Embodiment) FIG. 12 shows a state in which the heat ray absorbing roller of the fourth invention is mounted on the mounting surface (a).
It is a top view and (b) side view. As shown in FIG. 12, the heat ray absorbing roller 37 of the fourth invention is configured by providing a light transmitting elastic layer, a heat ray absorbing layer on the outer peripheral surface of a cylindrical light transmitting base, and elastic cover members 55 at both ends. Has been done. Elastic cover member 5
The outer diameter of 5 is larger than the outer diameter of the heat ray absorbing roller 37. In the method of manufacturing the heat ray absorbing roller, the elastic covering member 55 is fixed after being molded in the first embodiment.

From the above, the heat ray absorbing roller of the present invention is
Both ends of the heat ray absorbing roller can be prevented from being damaged, and further, when the heat ray absorbing roller is placed on the mounting surface 59, it is possible to prevent the outer circumferential surface of the heat ray absorbing roller from being scratched or dusted. When placed, it is possible to prevent the outer peripheral surfaces of the heat ray absorbing rollers 37 from contacting each other.

(Seventh Embodiment) FIG. 13 is a (a) side view and a (b) front sectional view showing the construction of the essential part of another heat ray absorbing roller of the fourth invention. As shown in FIG. 13, the fourth
Another heat ray absorbing roller 38 of the invention of claim 1 is a light transmitting elastic layer 38b and a heat ray absorbing layer 38 on an outer peripheral surface of a cylindrical light transmitting substrate 38a.
c, elastic cover members 56 at both ends. The outer diameter of the elastic covering member 56 is larger than the outer diameter of the heat ray absorbing layer 38c, and further has four convex portions 56a for preventing rolling. The method for manufacturing the heat ray absorbing roller 38 is the same as the method for manufacturing the heat ray absorbing roller 38 according to the first embodiment.
6 is fixed.

Next, another heat ray absorbing roller will be described. FIG. 14 is a (a) side view and a (b) front sectional view showing the structure of the essential part of another heat ray absorbing roller of the fourth invention. As shown in FIG. 14, another heat ray absorbing roller 39 of the present invention has a transparent elastic layer 39 on the outer peripheral surface of a cylindrical transparent substrate 39a.
b, the heat ray absorbing layer 39c, and elastic cover members 57 at both ends. The outer diameter of the elastic covering member 57 is larger than the outer diameter of the heat ray absorbing layer 39c, and has a surface portion 57a for preventing rolling.

In this method of manufacturing the heat ray absorbing roller, the elastic covering member 57 is fixed after being molded in the first embodiment.

As described above, the heat ray absorbing roller of the present invention can prevent the heat ray absorbing roller from rolling when the heat ray absorbing roller is placed on the mounting surface 59. Further, by covering both ends with the elastic covering members 57, damage to both ends of the heat ray absorbing roller can be prevented. If the elastic covering member is larger than the outer diameter of the translucent elastic layer, it is possible to prevent the outer peripheral surface of the heat ray absorbing roller 39 from being scratched or dusted when the heat ray absorbing roller 39 is placed on the mounting surface 59.

In the above embodiment, an example was described in which the PFA tube, which is a heat ray absorbing layer, was attached in advance to a predetermined position of the molding die, but the heat ray absorbing layer was attached to a predetermined position of the molding die. Alternatively, the heat ray absorbing member may be formed on the outer side (outer peripheral surface) of the transparent elastic layer by spraying or coating after the transparent elastic layer is molded.

[0081]

As constructed above, the following effects can be obtained.

According to the first and fourth aspects of the present invention, the elastic member is configured so that stress is not applied to the outer peripheral direction from the inner surface of the end of the light-transmitting substrate. Therefore, the heat ray absorbing roller of the present invention is light-transmitting when manufactured. The roller can be easily manufactured because cracks due to stress from both ends of the base body are less likely to occur.

According to the sixth aspect of the invention, since the positioning members for holding the translucent substrate are attached to both ends, the heat ray absorbing roller of the present invention has the translucent substrate and the translucent elastic layer at the time of manufacture. Has a good degree of coaxiality, that is, a roller with less uneven thickness of the translucent elastic layer.

According to the fifteenth aspect of the present invention, since the cap member is provided in the vicinity of both ends of the transparent substrate and the cap portion protects the transparent substrate, the heat ray absorbing roller of the present invention is Cap members can be provided at both ends of the transparent base to prevent damage to both ends of the transparent base.

According to the twenty-first aspect of the invention, the exposed ends of the light-transmitting substrate in the axial direction are covered with the elastic members, so that damage to both ends of the heat ray absorbing roller can be prevented.

According to the twenty-fourth aspect of the present invention, since the elastic covering members attached to both ends of the heat ray absorbing roller are larger than the outer diameter of the light-transmitting elastic layer, the heat ray absorbing roller can be installed at both ends of the heat ray absorbing roller. Damage can be prevented, and when the heat absorbing roller is placed on the mounting surface, the outer periphery of the heat absorbing roller is scratched,
It is possible to prevent dust from getting on.

According to the twenty-fifth aspect of the invention, since the elastic covering members attached to both ends of the heat ray absorbing roller are larger than the outer diameter of the heat ray absorbing layer and the convex portions or the surface portions are provided, the heat ray absorbing roller is It is possible to prevent the heat ray absorbing roller from rolling when placed on the mounting surface, and to prevent damage to both ends of the heat ray absorbing roller.

According to the twenty-sixth aspect of the present invention, since the heat ray absorbing roller having the above-mentioned structure is used, a good fixing device can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a configuration of an image forming apparatus including a color printer.

FIG. 2 is a side sectional view showing a configuration of a main part of a fixing device.

FIG. 3 is a cross-sectional view showing a main configuration of a heat ray absorbing roller of the first invention.

FIG. 4 is a sectional view of an essential part of a molding die during manufacturing of the heat ray absorbing roller of the first invention.

FIG. 5 is a cross-sectional view of essential parts of a molding die during manufacturing of another heat ray absorbing roller of the first invention.

FIG. 6 is a sectional view of an essential part of a molding die during manufacturing of the heat ray absorbing roller of the second invention.

FIG. 7 is a cross-sectional view of an essential part of a molding die during manufacturing of another heat ray absorbing roller of the second invention.

8A is a perspective view of a main part of a positioning member, and FIG. 8B is a perspective view of a main part of another positioning member.

9 (a) is a side view and FIG. 9 (b) is a front sectional view showing a configuration of a main part of a heat ray absorbing roller of a third invention.

FIG. 10 is a front sectional view showing a configuration of a main part of another heat ray absorbing roller of the third invention.

FIG. 11 is a front sectional view showing a configuration of a main part of another heat ray absorbing roller of the third invention.

FIG. 12A is a top view and FIG. 12B is a side view showing a state in which the heat ray absorbing roller of the fourth invention is mounted on a mounting surface.

13 (a) is a side view and FIG. 13 (b) is a front cross-sectional view showing the structure of a main part of another heat ray absorbing roller of the fourth invention.

14 (a) is a side view and FIG. 14 (b) is a front cross-sectional view showing the structure of a main part of another heat ray absorbing roller of the fourth invention.

[Explanation of symbols]

31, 32, 33, 34, 35, 36, 37, 38, 3
9 Heat ray absorbing roller (fixing roller member) 41 Molding die 44 O-ring (elastic member) 46 Through shaft 47 Positioning member 48 Holding member 49 Through shaft 52 Cap member 54 Rubber ring (elastic cover member) 55, 56, 57 Elastic cover Member 56a Convex portion 57a Surface portion

Continued front page    (72) Inventor Satoshi Haneda             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock             In the company F-term (reference) 2H033 AA23 AA31 BB03 BB04 BB13                       BB15 BB26                 3J103 AA02 AA14 AA24 AA74 BA05                       EA02 FA01 FA15 FA18 GA02                       GA57 GA58 GA60 HA04 HA12                       HA53                 3K058 AA34 BA18 DA26

Claims (26)

[Claims] 1. A cylindrical translucent base having a translucency to heat rays, and a cylindrical translucent elastic layer having a translucency to the heat rays outside the translucent base. A fixing roller member formed of a heat ray absorbing layer that absorbs the heat rays outside the light transmitting elastic layer, wherein the light transmitting base is held at both ends of the light transmitting base via elastic members and the elastic members. When the holding member is attached and the holding member is pressed in the axial longitudinal direction of the transparent base, the elastic member, which is in contact with the outermost end of the transparent base, of the elastic members is transparent. The structure is such that no stress is applied in the outer peripheral direction from the inner surface of the base,
After being installed in a predetermined position of the molding die, a liquid material for forming the light-transmitting elastic layer is injected between the outer periphery of the light-transmitting substrate and the inner surface of the molding die or the heat ray absorbing layer. The fixing roller member is manufactured by molding. 2. The inner diameter of the cylindrical light-transmitting substrate is A, and the outer diameter of the elastic member of the elastic members that is in contact with the outermost end of the light-transmitting substrate is B ₁ , the elastic member The fixing roller member according to claim 1, wherein the following condition is satisfied, where B ₂ is the inner diameter of the elastic member that is in contact with the outermost end of the translucent substrate. (B ₁ + B ₂ ) / 2> A 3. The fixing roller member according to claim 1, wherein the elastic member has a ring shape. 4. A cylindrical translucent base having a translucency to heat rays, and a cylindrical translucent elastic layer having a translucency to the heat rays outside the translucent base. A fixing roller member formed of a heat ray absorbing layer that absorbs the heat rays on the outer side of the light transmitting elastic layer, holding members for holding the light transmitting body at both ends of the light transmitting body, and A through shaft for restricting the position of the holding member is attached so that stress is not applied in the axial direction of the transparent base, and the transparent elastic layer is formed after being installed at a predetermined position of the molding die. A fixing roller member manufactured by injecting a liquid material between the outer periphery of the translucent substrate and the inner surface of the molding die or the heat ray absorbing layer, and molding. 5. A threaded portion is formed at both ends of the through shaft in the longitudinal direction of the shaft. Further, a threaded portion that engages with the threaded portion of the through shaft is formed on the holding member. The fixing roller member according to claim 4, wherein the screw portions of the holding member are engaged with the screw portions to regulate the positions of the holding members at both ends. 6. A cylindrical translucent base having a translucency to heat rays, and a cylindrical translucent elastic layer having a translucency to the heat rays outside the translucent base. A fixing roller member formed of a heat ray absorbing layer that absorbs the heat rays on the outer side of the transparent elastic layer, a positioning member that is held by the outer peripheral surface of the transparent substrate is attached, and the outer peripheral surface of the positioning member has a molding die. A liquid material for forming the light-transmissive elastic layer is placed on the inner surface of the mold or the heat ray absorbing layer provided on the outer periphery of the light-transmissive elastic layer, and is placed at a predetermined position of the molding die. A fixing roller member, characterized in that the fixing roller member is manufactured by injecting it between the outer periphery of the transparent substrate and the inner surface of the molding die or the heat ray absorbing layer. 7. The fixing roller member according to claim 6, wherein the positioning member is arranged in the vicinity of both ends of the fixing roller member in the axial longitudinal direction. 8. The fixing roller member according to claim 6, wherein a plurality of the positioning members are arranged near both ends of the fixing roller member in the axial longitudinal direction. 9. The fixing roller according to claim 6, wherein a part or all of the positioning member is fixed to the fixing roller member after the fixing roller member is manufactured by molding. Element. 10. The fixing roller member according to claim 6, wherein a radial thickness of the positioning member is substantially the same as a radial thickness of the translucent elastic layer. . 11. The fixing roller member according to claim 6, wherein a material of the positioning member is a rubber material. 12. The fixing roller member according to claim 11, wherein the hardness of the positioning member is higher than the hardness of the transparent elastic layer. 13. The fixing roller member according to claim 6, wherein the positioning member is made of the same material as the translucent elastic layer. 14. The fixing roller member according to claim 6, wherein the positioning member is bonded to the translucent substrate. 15. A cylindrical light-transmitting substrate having a light-transmitting property to heat rays, and a cylindrical light-transmitting elastic layer having a light-transmitting property to the heat rays on the outer side of the light-transmitting substrate. In a fixing roller member including a heat ray absorbing layer that absorbs the heat ray outside the light transmitting elastic layer, the light transmitting elastic layer is formed after the light transmitting substrate is installed at a predetermined position of a molding die. After molding by injecting a liquid material between the outer periphery of the transparent substrate and the inner surface of the molding die or the heat ray absorbing layer,
A fixing roller member, characterized in that a cap member for protecting both ends of the transparent base is provided in the vicinity of both ends of the transparent base. 16. The fixing roller member according to claim 15, wherein the fixing roller member is incorporated in a fixing device with the cap member attached. 17. The outer diameter of the cap member is substantially the same as the outer diameter of the translucent elastic layer.
The fixing roller member according to 5 or 16. 18. The fixing roller member according to claim 15, wherein at least a portion of the cap member that comes into contact with the transparent base is made of a rubber material. 19. The fixing roller member according to claim 18, wherein the hardness of the rubber material of the cap member is higher than the hardness of the translucent elastic layer. 20. The fixing roller according to claim 15, 16, 17, or 18, wherein a material of the cap member is a rubber material, and the material is the same as a material of the translucent elastic layer. Element. 21. A cylindrical translucent base having a translucency to heat rays, and a cylindrical translucent elastic layer having a translucency to the heat rays outside the translucent base. A fixing roller member comprising a heat ray absorbing layer that absorbs the heat rays outside the light transmitting elastic layer, wherein both ends of the light transmitting substrate in the axial longitudinal direction are protected by elastic cover members. Roller member. 22. The fixing roller member according to claim 21, wherein both ends of the translucent substrate are coated with a rubber material. 23. The fixing roller member according to claim 21, wherein a rubber material is attached to both ends of the translucent substrate. 24. A cylindrical light-transmitting substrate having a light-transmitting property to heat rays, and a cylindrical light-transmitting elastic layer having a light-transmitting property to the heat rays on the outer side of the light-transmitting substrate. A fixing roller member comprising a heat ray absorbing layer that absorbs the heat rays outside the light transmitting elastic layer, wherein both ends in the axial longitudinal direction in which the light transmitting elastic layer is formed on the outer peripheral surface of the light transmitting base. A fixing roller member, which is protected by a cap member or an elastic covering member having a diameter larger than the outer diameter of the transparent elastic layer. 25. A cylindrical translucent base having a translucency to heat rays, and a cylindrical translucent elastic layer having a translucency to the heat rays outside the translucent base. A fixing roller member comprising a heat ray absorbing layer that absorbs the heat rays outside the light transmitting elastic layer, wherein at least one end portion in the axial direction in which the light transmitting elastic layer is formed on the outer peripheral surface of the light transmitting base. The fixing roller member is characterized in that a convex member or a surface member for preventing the fixing roller member from rolling is provided. 26. A fixing device using the fixing roller member according to any one of claims 1 to 25.