TW201424443A - Heater, and fixation device, image formation device, and heating device equipped with same - Google Patents

Abstract

The purpose of the present invention is to provide a heater which is equipped with a plurality of cell patterns comprising resistive heating wiring connected in parallel and is capable of detecting burn-out of cell patterns, and to provide a fixation device, an image formation device, and a heating device equipped with the heater. This heater (1) is equipped with a base (11), resistive heating wiring (12) that is provided on the base (11), and burn-out detection wiring (13) that is provided on the base (11) while insulated from the resistive heating wiring (12). The resistive heating wiring (12) has multiple cell patterns (121) that have substantially the same heat-generating characteristics and are electrically connected in parallel to one another. The burn-out detection wiring (13) has a sensing section (131) with a temperature-dependent resistance value for each of the cell patterns (121) and is formed as a single body by electrically connecting the sensing sections (131) together. In the event of any one of the cell patterns (121) burning out, the resistance of the burn-out detection wiring (13) changes due to the change in temperature caused by the burn-out.

Description

Heater and fixing device therewith, image forming device and heating device

The present invention relates to a heater, a fixing device provided therewith, an image forming device, and a heating device. More specifically, the present invention relates to a heater having a resistance heating wiring that generates heat by energization and a disconnection detection wiring for detecting a disconnection, and a fixing device, an image forming apparatus, and a heating device including the same.

A heater which is a heating means for performing heat treatment and is provided with a resistance heating wiring on a surface of a stainless steel plate or a ceramic plate is known. Such a heater can be formed thinly and succinctly, for example, by being incorporated in a photocopier or a printer, for fixing toner or ink on a recording medium, or by being incorporated into a dryer to make a panel. The object to be treated is uniformly heated and dried for the purpose of use. In these purposes, in addition to being as uniform as possible within the desired surface temperature distribution, it is also required to detect this condition when the temperature distribution in the plane exceeds the allowable range. In connection with such a technique, Patent Document 1 described later is known.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-359059

The heater of the above-mentioned Patent Document 1 is a heater having an automatic disconnection function for the purpose of preventing an excessive temperature rise. This heater exhibits an excellent effect for the purpose of preventing thermal explosion, etc., but acts only at a predetermined temperature set in advance. On the other hand, it is required to detect a disconnection in a wider temperature band, and to perform feedback such as feedback for softer correspondence.

The present invention has been made in view of the above circumstances, and an object of the invention is to provide a heater having a plurality of battery patterns formed by connecting a plurality of battery patterns formed by a resistance heating wiring, and a heater capable of detecting a disconnection of a battery pattern, and a fixing device including the same, Image forming device and heating device.

That is, the present invention is as follows.

The heater according to the first aspect of the present invention, further comprising: a base, a resistance heating wiring disposed on the base, and a heater insulated from the resistance heating wiring and disposed on the base of the disconnection detecting wiring; The resistor heating wiring has a plurality of battery patterns having substantially the same heat generation characteristics and electrically connected in parallel with each other; The disconnection detecting wiring is provided with an inductance portion that changes in resistance value depending on the temperature of each of the battery patterns, and the sensing portion is electrically connected to each other as an integrated wiring; and the disconnection detecting wiring is used in any of the batteries. When the pattern is broken, a change in resistance occurs due to a temperature change caused by the aforementioned disconnection.

The heater according to claim 2, wherein the battery pattern is formed by using a conductive material that changes in resistance depending on temperature and is formed in the heater according to the first aspect of the invention. The conductive material of the sensing portion has a larger temperature coefficient of resistance than the conductive material constituting the battery pattern.

The heater according to claim 3, wherein the sensor unit is disposed in a region outside the battery pattern in the heater according to the first or second aspect of the invention.

The heater according to the fourth aspect of the present invention is characterized in that, in the heater according to the first or second aspect of the present invention, the heater is swept in a predetermined direction while facing the object to be heated. a heater that heats at least one of the object to be heated and the heater; The battery pattern is formed in one battery pattern and has an inclined pattern portion that is laid obliquely to the predetermined direction.

The heater according to the fifth aspect of the invention is characterized in that the heater includes a base, a resistance heating wiring disposed on the base, and a heater insulated from the resistance heating wiring and disposed in the plurality of disconnection detection wirings of the base. The foregoing resistance heating wiring has a plurality of battery patterns and has The substantially same heat generating characteristics are electrically connected in parallel with each other. Further, the resistance heating wiring includes a first pattern group formed by a predetermined number of battery patterns in the battery pattern, and a second pattern group. The heat generating characteristic substantially the same as that of the first pattern group is formed by a predetermined number of battery patterns, and the first disconnection detecting line in the disconnection detecting line corresponds to each of the battery patterns constituting the first pattern group. a sensing portion that changes in resistance value depending on a temperature, and the sensing portion is electrically connected to each other as an integrated wiring; and the second disconnection detecting wiring in the disconnection detecting wiring corresponds to each of the second pattern groups a battery pattern having a sensing portion that changes in resistance depending on a temperature, and wherein the sensing portions are electrically connected to each other as an integrated wiring; and at least one of the battery patterns is disconnected, the battery pattern due to disconnection The change in temperature causes a change in the resistance ratio of the first disconnection detecting wiring and the second disconnection detecting wiring.

The heater according to claim 6 is the heater according to the fifth aspect of the invention, wherein the battery pattern is formed by using a conductive material that changes in resistance depending on temperature. The conductive material of the sensing portion has a larger temperature coefficient of resistance than the conductive material constituting the battery pattern.

The heater according to claim 7 is the heater according to the fifth or sixth aspect of the invention, wherein the sensor unit is disposed in a region outside the battery pattern.

The heater according to the eighth aspect of the present invention is characterized in that, in the heater according to Item 5 or Item 6, the heater is swept in a predetermined direction while facing the object to be heated. At least one of the object to be heated and the heater is a heater that heats the object to be heated; and the battery pattern is formed in one of the battery patterns and has an inclined pattern portion that is inclined in the predetermined direction.

The gist of the fixing device described in claim 9 is that the heater described in item 1 or item 5 of the claim is provided.

The object of the image forming apparatus according to claim 10 is the heater according to the first or fifth aspect of the claim.

The heating device described in claim 11 is characterized in that the heater described in claim 1 or 5 is provided.

According to the heater of the first aspect of the present invention, when the battery pattern is disconnected, the disconnection detection wiring is detected by a change in resistance due to a change in resistance due to the temperature change caused by the disconnection. The broken line of the battery pattern.

According to the heater of the fifth aspect of the present invention, when the battery pattern is broken, a change in the resistance ratio between the first disconnection detection wiring and the second disconnection detection wiring occurs due to a temperature change of the battery pattern due to the disconnection. Therefore, the disconnection of the battery pattern can be detected by detecting a change in the ratio of the resistance. Further, by knowing in advance the temperature coefficient of resistance of the first disconnection detection wiring and the second disconnection detection wiring, it is known which disconnection detection wiring is As a result of the change in the resistance value, it is found that the first pattern group covering the first line breakage detecting line and the pattern group covering the second line detecting line of the second line detecting line are broken. Therefore, it is also possible to provide a corresponding disconnection detection wiring by subdividing the pattern group, and to narrow the specific disconnection region in a narrower range.

In the heater according to the second and sixth aspects of the present invention, the conductive material constituting the sensing portion is compared with the conductive material constituting the battery pattern and the heater having a large temperature coefficient of resistance. The state of the pattern can improve the detection accuracy.

The heater according to the third or seventh aspect of the present invention is disposed in a region in which the sensing portion is disposed outside the battery pattern, and in a state in which the sensing portion is disposed outside the region outside the battery pattern. More correct wire break detection is possible.

In the heater according to the fourth aspect or the eighth aspect of the invention, when the battery pattern has the inclined pattern portion which is laid in a predetermined direction in one battery pattern, the object to be heated can be heated more uniformly.

1‧‧‧heater

11‧‧‧ base

12‧‧‧Resistive heating wiring

121‧‧‧ battery pattern

122‧‧‧Wire section

123‧‧‧ Island Department

125‧‧‧1st pattern group

126‧‧‧2nd pattern group

127a‧‧‧ horizontal pattern department

127b‧‧‧Vertical pattern department

127c‧‧‧Slanted pattern department

128‧‧‧Vertical pattern gap

129‧‧‧Slanted pattern gap

13‧‧‧Disconnection detection wiring

131‧‧‧Induction Department

132‧‧‧Connecting Department

133‧‧‧Wire Department

134‧‧‧ Island Department

135‧‧‧1st disconnection detection wiring

136‧‧‧2nd wire break detection wiring

141,142‧‧‧Insulation Area (projection image of the shape)

151‧‧‧Battery pattern

4‧‧‧Portrait forming device

41‧‧‧Laser scanner

42‧‧‧ lenses

43‧‧‧Powered devices

44‧‧‧Photosensitive drum

45‧‧‧Densor

46‧‧·Transfer drum

47‧‧‧Transfer roller

5‧‧‧Fixed devices (fixed means)

51‧‧‧Fixed rolls

52‧‧‧Pressure roller

53‧‧‧Heater Maintenance Department

54‧‧‧Pressure roller

6‧‧‧heater support desk

7‧‧‧ Temperature Controller

P‧‧‧recording media

Fig. 1 is a schematic plan view showing an example of a heater of the present invention.

Fig. 2 is a schematic plan view showing another example of the heater of the present invention.

Fig. 3 is a schematic plan view showing another example of the heater of the present invention.

Fig. 4 is a schematic plan view showing another example of the heater of the present invention.

Fig. 5 is a schematic plan view showing another example of the heater of the present invention.

Fig. 6 is a schematic exploded perspective view showing an example of a heater of the present invention.

Fig. 7 is a schematic exploded perspective view showing another example of the heater of the present invention.

Fig. 8 is a schematic exploded perspective view showing another example of the heater of the present invention.

Fig. 9 is a schematic exploded perspective view showing an example of a disconnection detecting wiring of the heater of the present invention.

Fig. 10 is a schematic exploded perspective view showing another example of the disconnection detecting wiring of the heater of the present invention.

Fig. 11 is a schematic exploded perspective view showing another example of the disconnection detecting wiring of the heater of the present invention.

Fig. 12 is an explanatory diagram for explaining a positional relationship between a sensing portion of a disconnection detecting wiring and a battery pattern.

Fig. 13 is a schematic plan view showing an example of a heater of the present invention.

Fig. 14 is a schematic plan view showing another example of the heater of the present invention.

Fig. 15 is a schematic plan view showing another example of the heater of the present invention.

Fig. 16 is a schematic plan view showing another example of the heater of the present invention.

Fig. 17 is a schematic plan view showing another example of the heater of the present invention.

Fig. 18 is a schematic plan view showing another example of the heater of the present invention.

Fig. 19 is a schematic plan view showing another example of the heater of the present invention.

Fig. 20 is a schematic perspective view showing an example of a fixing device of the present invention.

Fig. 21 is a schematic perspective view showing another example of the fixing device of the present invention.

Fig. 22 is a schematic view showing an example of an image forming apparatus of the present invention.

Fig. 23 is a view for explaining a state in which heating is performed using an example of the heater of the present invention.

Fig. 24 is a view for explaining a state in which heating is performed using another example of the heater of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

In addition, in FIGS. 1 to 5 and FIGS. 13 to 19, in order to clearly disclose the positional relationship between the resistance heating wiring 12 and the disconnection detecting wiring 13, other layers which can be disposed between the interlayer insulating layers and the like are omitted.

[1] The heater of the first invention

The heater (1) according to the first aspect of the invention (see FIGS. 1 to 5 and the like) includes a base body (11), a resistance heating wiring (12) disposed on the base body (11), and insulation from the resistance heating wiring (12). The heater disposed in the disconnection detecting wiring (13) of the base (11) is characterized in that the resistance heating wiring (12) has a plurality of battery patterns (121) and has substantially the same heat generation characteristics, and The disconnection detection wirings (13) correspond to the respective battery patterns (121), and have sensing portions (131) whose resistance values vary depending on temperature, and the sensing portions (131) are electrically connected to each other. Integrated wiring; disconnection detection wiring (13), when any battery pattern (121) is disconnected, A change in resistance occurs due to a temperature change caused by a wire break (refer to FIG. 1).

The "base body (11)" has a function as a support for supporting the resistance heating wiring 12 and the disconnection detecting wiring 13. The base 11 is not particularly limited as long as it can support the resistance heating wiring 12 and the disconnection detecting wiring 13 . As the base 11, for example, a metal, a ceramic, a composite material or the like can be used. As the metal, steel or the like can be used, and stainless steel is preferably used.

The type of stainless steel is not particularly limited, but ferromagnetic stainless steel and/or Worthite iron stainless steel is preferred. Further, in particular, among these stainless steel species, a variety having excellent heat resistance and/or acid resistance is preferred. That is, for example, even in the ferromagnetic stainless steel, it is preferable that the composition is in the range of 15 to 20% of Cr and 1.5 to 3.5% of Mo or Al. On the other hand, even in the Worthfield iron-based stainless steel, it is preferable that Ni is 10 to 22%, Cr is 16 to 26%, and Mo is in the range of 1 to 3%. More specifically, SUS430, SUS436, SUS444, SUS316L, etc. are mentioned. These may be used alone or in combination of two or more.

Further, as the metal constituting the base 11, aluminum, magnesium, copper, and an alloy of these metals can be used. These may be used alone or in combination of two or more.

Among them, aluminum, magnesium, and these alloys (aluminum alloy, magnesium alloy, Al-Mg alloy, etc.) are preferably used in the present heater to have a small specific gravity. That is, the weight of the heater can be reduced by using the metal for the base 11. Further, copper and its alloys are desirably utilized in the present heater to have excellent thermal conductivity. That is, by means of the metals The base 11 is used to improve the soaking property of the heater.

As the aluminum alloy, any alloy of No. 1000 to No. 8000 can also be used. Even among these, 3000 and 6000 are preferred from the viewpoint of thermal conductivity.

Examples of the magnesium alloy include a Mg-Al alloy, a Mg-Al-Zn alloy, a Mg-Zn-Zr alloy, a Mg-Cu-Zn alloy, a Mg-RE-Zr alloy, and a Mg-Zr-RE. -Ag-based alloy, Mg-Y-RE-based alloy, Mg-Al-Si-based alloy, Mg-Al-RE-based alloy, Mg-Mn-based alloy, etc. (RE represents a rare earth element).

Examples of the copper alloy include a Cu-Be alloy, a Cu-Ti alloy, a Cu-Ni alloy, a Cu-Cr alloy, a Cu-Zr alloy, and a Cu-Fe-P alloy.

When the metal is used as the base material, in order to secure the insulation of the resistance heating wiring 12 and the disconnection detecting wiring 13, the insulating layer may be interposed between the base 11 and each wiring as needed. The insulating layer may be formed of any material. However, when a metal (stainless steel or the like) is used as the base 11, the glass is preferably from the viewpoint of thermal expansion equilibrium, and further, the crystallized glass having a softening point of 600 ° C or higher. And semi-crystalline glass is more desirable. Specifically, SiO ₂ -Al ₂ O ₃ -MO-based glass is preferred. However, MO is an oxide of an alkaline earth metal (MgO, CaO, BaO, SrO, etc.). The thickness of the insulating layer is not particularly limited, but is preferably 60 to 120 μm, more preferably 70 to 110 μm, and more preferably 75 to 100 μm.

Further, as the ceramic constituting the base 11, the insulator for maintaining the resistance heating wiring 12 and the disconnection detecting wiring 13 at a high temperature is good. That is, for example, alumina, aluminum nitride, zirconia, cerium oxide, mullite, spinel, cordierite, tantalum nitride, or the like can be given. These may be used alone or in combination of two or more. Alumina and aluminum nitride are also preferred in these. Further, examples of the composite material of the metal and the ceramic include SiC/C and SiC/Al. These may be used alone or in combination of two or more.

Further, the thickness of the base 11 is not particularly limited, but may be, for example, 0.4 to 20 mm, and preferably 0.6 to 5 mm.

The "resistance heating wiring (12)" is a wiring that generates heat by energization. Then, the resistance heating wiring 12 has a plurality of wirings having battery elements 121 that have substantially the same heat generation characteristics and are electrically connected in parallel. Furthermore, a battery pattern having a specific heat generation may be used, and may not be provided. Further, the battery pattern 121 has a predetermined pattern shape and is a part of the resistance heating wiring 12. Each of the battery patterns 121 is also a heat generation pattern that generates heat by energization. The battery patterns may have substantially the same heat generation characteristics, and the pattern shapes may be the same or different.

Each of the battery patterns 121 has substantially the same heat generation characteristics. The fact that they have substantially the same heat generation characteristics means that each battery pattern has substantially the same temperature coefficient of resistance and resistance value under the same measurement conditions. More specifically, the difference in the temperature coefficient of resistance between the battery patterns is within ±20%, and the difference in resistance values between the battery patterns is within ±10%. Further, when the difference was measured, the temperature coefficient of resistance and the resistance value were measured in accordance with JIS C2526.

In the heater 1 of the present invention, an additive having excellent heat resistance is obtained by a battery pattern having a plurality of electrically connected parallel heat sources. Heater. That is, in one continuous resistance heating wiring, the function as a heater is lost due to the disconnection at one place, but even if the battery pattern 121 is connected in parallel, the disconnection of the battery pattern 121 occurs. The battery pattern 121 connected in parallel to the battery pattern 121 can also be continuously supplied with power, and can be directly used as a heater.

The conductive material to be the resistance heating wiring 12 is not particularly limited as long as it can be heated by energization, but silver, copper, gold, platinum, palladium, rhodium, tungsten, molybdenum or the like can be used. These may be used alone or in combination of two or more. In the case of using two or more kinds together, it can be used as an alloy. More specifically, a silver-palladium alloy, a silver-platinum alloy, a platinum-iridium alloy, silver, copper, gold, or the like can be used.

Further, the conductive material constituting the resistance heating wiring 12 has a temperature coefficient of resistance (in the range of 0 to 1000 ° C) from the viewpoint of exhibiting an automatic temperature equalization function (also referred to as an automatic temperature compensation function) between the plurality of battery patterns 121. A conductive material of 500 to 4400 ppm/° C is preferred. The temperature coefficient of resistance (0 to 1000 ° C) is preferably 500 to 4000 ppm / ° C, and more preferably 500 to 3800 ppm / ° C. In particular, when Ag or Ag-Pd is used as the conductive material, a conductive material having a temperature coefficient of resistance (in the range of 0 to 600 ° C) of 500 to 4000 ppm/° C is preferable, and 500 to 3800 ppm/° C. is more preferable. On the other hand, when Mo and/or W is used as the conductive material, a conductive material having a temperature coefficient of resistance (in the range of 0 to 1000 ° C) of 2,000 to 4,000 ppm/° C. is preferable, and more preferably 3,000 to 4,000 ppm/° C. Further, the thickness of the resistance heating wiring 12 is preferably 3 to 20 μm, more preferably 5 to 17 μm, and more preferably 8 to 12 μm from the viewpoint of the area specific resistance.

Further, the resistance heating wiring 12 may appropriately have a conductive material, a line width, a line thickness, and the like in each portion as needed.

As described above, when the resistance heating wiring 12 is formed using a resistance temperature-dependent conductive material, the plurality of battery patterns 121 can have an automatic temperature equalization function. That is, if the temperature of the predetermined battery pattern 121 is lowered, the resistance value of the battery pattern 121 is also lowered. When the resistance value is lowered, the amount of current input for electrical parallel connection increases, and as a result, the amount of heat generated by the battery pattern 121 also increases. In this way, the plurality of battery patterns 121 are automatically equalized to a constant state.

Further, when the temperature of the second battery pattern is lowered when the second battery pattern is held by the first battery pattern and the third battery pattern, the temperature decrease component is compensated for from the surrounding first and third battery patterns. Then, the input of the current of the first battery pattern and the third battery pattern in which the temperature is lost is increased, and the effect of automatically recovering the lost temperature is exhibited. As a result, the other battery patterns around the second battery pattern are operated to compensate the temperature of the second battery pattern. As a result, the heater of the present invention covers the entire substrate and spontaneously and uniformly generates heat. Moreover, in this point of view, since the substrate 11 has both excellent thermal conductivity and thermal shock resistance, it is preferably formed of a metal.

The "broken wire detecting wire (13)" is a wire having a sensing portion 131 whose resistance value changes depending on temperature. Further, the disconnection detecting wiring 13 has the sensing portion 131 corresponding to each of the battery patterns 121. In other words, the sensing unit 131 is provided corresponding to each of the battery patterns 121. Further, the sensing portions 131 are electrically connected to each other, and are wired as a disconnection detecting wiring. The disconnection detecting wiring 13 is a sensing portion having a corresponding battery pattern 121 131. When the battery pattern 121 is broken, the temperature of the sensing portion corresponding to the battery pattern 121 is lowered. Since the sensing unit 131 is formed of a conductive material that changes in resistance depending on the temperature, the resistance value changes due to a decrease in temperature. By detecting the change in the resistance value, the heater of the present invention can detect the disconnection of the resistance heating wiring.

The sensing unit 131 may have an arbitrary shape. That is, for example, the same shape as the battery pattern 121 may be used, and different shapes may be used. In addition, as long as the temperature change of the battery pattern 121 can be detected, it may be arranged so as to overlap with the wiring of the battery pattern 121 (overlapped with the projected image), and may be arranged so as not to overlap. Further, the sensing portions 131 are electrically connected to each other and integrated as the disconnection detecting wiring 13. The electrical connection between the sensing portions 131 can be performed using the connecting portion 132. The connection portion 132 may be formed using the same conductive material as the induction portion 131, and may be formed using a different conductive material.

In other words, for example, as illustrated in FIG. 9, the sensing portion 131 and the connecting portion 132 are not distinguished (the result is that the portion of the disconnection detecting wiring 13 corresponding to the battery pattern 121 is a disconnection detecting wiring having a function as the sensing portion 131). It is also possible to form the same conductive material by the same line width and line thickness. Further, as illustrated in FIG. 10, the position of the corresponding battery pattern 121 on one of the thin connecting portions 132 may be formed by adding the sensing portion 131 so that the resistance influence rate is larger than the connecting portion 132. Further, as illustrated in FIG. 11, the connection portion 132 may be formed between the adjacent two sensing portions 131 so that the sensing portions 131 are electrically connected to each other.

In these, as shown in FIG. 9, the disconnection detecting wiring 13 When the sensing portion 131 and the connecting portion 132 are integrally formed by using the conductive material constituting the sensing portion 131, that is, when the sensing portion 131 and the connecting portion 132 are integrally formed using a desired conductive material, the wire can be obtained at a low cost. The function of the heater 1 is detected. That is, for example, the pattern of one disconnection detecting wiring 13 can be formed by one screen printing, and a heater having a disconnection detecting function which is advantageous for engineering or beneficial to the material cost can be obtained.

On the other hand, in the embodiment illustrated in FIGS. 10 and 11, the conductive portion of the sensing portion 131 and the connecting portion 132 can be made different. In particular, when the sensing portion 131 of the disconnection detecting line 13 is formed of a conductive material having a large temperature coefficient of resistance as compared with the conductive material constituting the connecting portion 132, the resistance of the sensing portion 131 is increased, that is, the cause is lowered. The resistance influence rate of the connection portion 132 can more accurately detect a change in resistance or a change in the impedance ratio due to the battery pattern 121. Therefore, it is possible to perform wire break detection with higher precision. Further, the conductive material constituting the connecting portion 132 does not need to be a material that changes in electrical resistance with respect to temperature changes.

Furthermore, each of the sensing portions 131 has substantially the same resistance characteristics. The substantially identical resistance characteristics mean that each of the sensing portions 131 has substantially the same temperature coefficient of resistance and resistance value. More specifically, the difference in the temperature coefficient of resistance between the battery patterns is within ±20%, and the difference in resistance between the sensing portions 131 is within ±10%. Further, when the difference is measured, the method of measuring the temperature coefficient of resistance and the resistance value is the same as that of the battery pattern 121 described above.

The conductive material constituting the sensing portion 131 may be changed in resistance value due to a change in temperature of each of the battery patterns 121. It is not particularly limited, but silver, copper, gold, platinum, palladium, rhodium, tungsten, molybdenum or the like can be used. These may be used alone or in combination of two or more. In the case of using two or more kinds together, it can be used as an alloy. More specifically, a silver-palladium alloy, a silver-platinum alloy, a platinum-iridium alloy, silver, copper, gold, or the like can be used.

Further, the temperature dependency of the resistance change of the conductive material constituting the sensing portion 131 is not particularly limited. However, for example, a conductive material having a temperature coefficient of resistance (in the range of 0 to 1000 ° C) of 500 to 4400 ppm/° C is preferable. The temperature coefficient of resistance (0 to 1000 ° C) is preferably 500 to 4000 ppm / ° C, and more preferably 500 to 3800 ppm / ° C. In particular, when Ag or Ag-Pd is used as the conductive material, a conductive material having a temperature coefficient of resistance (in the range of 0 to 600 ° C) of 500 to 4000 ppm/° C is preferable, and 500 to 3800 ppm/° C. is more preferable. On the other hand, when Mo and/or W is used as the conductive material, a conductive material having a temperature coefficient of resistance (in the range of 0 to 1000 ° C) of 2,000 to 4,000 ppm/° C. is preferable, and more preferably 3,000 to 4,000 ppm/° C. Further, the line thickness of the sensing portion 131 is preferably 3 to 20 μm, more preferably 5 to 17 μm, and more preferably 8 to 12 μm from the viewpoint of the area specific resistance.

Further, the resistance heating wiring 12 including the sensing portion 131 may appropriately have a conductive material, a line width, a line thickness, and the like in each portion as needed.

Further, from the viewpoint of the sensitivity of the disconnection detection, the temperature coefficient of resistance of the conductive material constituting the sensing portion 131 can be made larger than the temperature coefficient of resistance of the conductive material constituting the battery pattern 121 (resistance heating wiring 12). Specifically, when Ag or Ag-Pd is used as the conductive material, the temperature coefficient of resistance of the conductive material constituting the sensing portion 131 is higher than the temperature coefficient of resistance of the conductive material constituting the battery pattern 121, and is greater than 30% at a temperature of 0 to 600 ° C. The above is Good, more than 50~150% is better.

In addition, the resistance value of the disconnection detection wiring 13 may be appropriately designed in accordance with the measurement system. However, generally, the resistance value of the resistance heating wiring 12 is small, so that the resistance value of the disconnection detection wiring 13 is designed to be larger than the resistance heating wiring 12 The resistance value (for example, several times to several tens of times) is preferred.

Further, the sensor unit 131 may be provided corresponding to the battery pattern 121. However, it is preferably disposed in a region outside the battery pattern 121 (inside the projection image). The area which is disposed in the outer shape is exemplified in FIG. 12, and represents a projection image in which the battery pattern 121 is formed when the substrate is irradiated with light from the vertical direction and the projection image of the battery pattern 121 is formed on the same plane as the disconnection detection wiring. The sensing unit 131 is disposed in 151. With this configuration, it is possible to perform disconnection detection with more excellent sensitivity.

Further, the sensing unit 131 may overlap the projection image of the wiring of the battery pattern 121, and may not overlap.

Further, the base 11, the resistance heating wiring 12, and the disconnection detecting wiring 13 are not particularly limited as long as the above-described arrangement conditions are sufficient.

In other words, for example, as shown in FIG. 6, the substrate 11 is disposed, the insulating layer 141 is disposed on the upper side thereof, the resistance heating wiring 12 is disposed on the upper side of the insulating layer 141, and the insulating layer 142 is disposed on the upper side of the resistance heating wiring 12. The disconnection detecting wiring 13 can be disposed on the upper side of the insulating layer 142.

Further, for example, as illustrated in FIG. 7, the substrate 11 is disposed, the insulating layer 141 is disposed on the upper side thereof, the disconnection detecting wiring 13 is disposed on the upper side of the insulating layer 141, and the insulating layer is disposed on the upper side of the disconnection detecting wiring 13. 142, the resistance heating wiring 12 can be disposed on the upper side of the insulating layer 142.

Further, for example, as illustrated in FIG. 8, the substrate 11 is disposed, the insulating layer 141 is disposed on the upper side thereof, and the disconnection detecting wiring 13 is disposed on the upper side of the insulating layer 141, and the insulating layer 142 is disposed on the lower side of the substrate 11 to be insulated. The resistor heating wiring 12 can be disposed on the lower side of the layer 142.

Further, a plurality of layers of the resistance heating wiring 12 and the disconnection detecting wiring 13 may be disposed in one heater 1 by a combination of these arrangements.

In the heater 1 of the first aspect of the invention, other portions are provided in addition to the substrate 11, the resistance heating wiring 12, and the disconnection detecting wiring 13. The other insulating layer is mentioned as another part. The insulating layer is provided for the purpose of obtaining insulation between the substrate 11 and various wirings and insulation between the various wirings.

Further, a top coat layer may be provided. For example, in FIG. 6, the top coating layer is provided on the upper side of the disconnection detecting wiring 13 for the purpose of protecting the disconnection detecting wiring 13. Again, the top coat layer is typically insulating. Similarly, in FIG. 7, the upper side of the resistance heating wiring 12 can be provided, and in FIG. 8, the upper side of the disconnection detecting wiring 13 and the lower side of the resistance heating wiring 12 can be provided.

[2] The heater of the second invention

The heater (1) according to the second aspect of the invention (see FIGS. 13 to 15 and the like) includes a base body (11), a resistance heating wiring (12) disposed on the base body (11), and insulation from the resistance heating wiring (12). A heater disposed on the wire breakage detecting wire (13) of the base body (11), which is characterized by: The resistance heating wiring (12) has a plurality of battery patterns (121) having substantially the same heat generation characteristics and electrically connected in parallel with each other; Further, the resistance heating wiring (12) includes a first pattern group (125) formed by a battery pattern (121) defined by a battery pattern (121), and a second pattern group (126) having a second pattern group (126) The heat generation characteristics substantially the same as those of the first pattern group (125) are formed by a predetermined number of battery patterns (121); The first disconnection detecting wiring (135) in the disconnection detecting wiring (13) corresponds to each battery pattern (121) constituting the first pattern group (125), and has a sensing portion (131) in which the resistance value changes depending on the temperature. And the sensing portions (131) are electrically connected to each other to form an integrated wiring; The second disconnection detection wiring (136) in the disconnection detection wiring (13) corresponds to each battery pattern (121) constituting the second pattern group (126), and has a sensing portion (131) in which the resistance value changes depending on the temperature. And the sensing portions (131) are electrically connected to each other to form an integrated wiring; When at least one of the battery patterns (121) is disconnected, the temperature of the battery pattern (121) due to the disconnection changes, and the first disconnection detecting wiring (135) and the second disconnection detecting wiring (136) are generated. The change in resistance ratio.

Regarding the above-mentioned "substrate (11)", the individual substrates of the heater of the first invention can be directly applied.

The "resistance heating wiring (12)" is common to the resistance heating wiring 12 of the first invention except that the first pattern group 125 and the second pattern group 126 are provided.

The first pattern group 125 and the second pattern group have substantially the same heat characteristic. Moreover, usually, the number of battery patterns 121 of the pattern groups is the same as each other. Further, the first pattern group 125 and the second pattern group 126 may be electrically connected to each other, and may be connected to each other as a group that is not electrically connected. As the former, for example, there are 20 battery patterns 121 connected in parallel, and 10 of them are set as the first pattern group, and the remaining 10 are set as the second pattern group. On the other hand, as the latter, ten battery patterns 121 connected in parallel are connected, and one of the battery patterns 121 connected in parallel to ten other systems not electrically connected thereto is set as the first pattern group, and the other is the other side. Set to the condition of the second pattern group.

The disconnection detection wiring (13) is the same as the disconnection detection wiring 13 of the first invention except that the first disconnection detection wiring 135 and the second disconnection detection wiring 136 are provided.

The first disconnection detecting line 135 is a wiring having the sensing portion 131 whose resistance value changes depending on the temperature of the first pattern group 125. Further, the first disconnection detecting line 135 includes the sensing unit 131 corresponding to each of the battery patterns 121 constituting the first pattern group 125. In other words, the sensing unit 131 is provided corresponding to each of the battery patterns 121. Further, the sensing portions 131 are electrically connected to each other, and the first disconnection detecting wiring 135 is integrated.

On the other hand, the second disconnection detecting line 136 is a wiring having the sensing portion 131 whose resistance value changes depending on the temperature of the second pattern group 126. Further, the second disconnection detecting line 136 includes the sensing unit 131 corresponding to each of the battery patterns 121 constituting the second pattern group 126. In other words, the sensing unit 131 is provided corresponding to each of the battery patterns 121. Further, the sensing portions 131 are electrically connected to each other, and the second disconnection detecting wiring 136 is integrated.

The first disconnection detection line 135 and the second disconnection detection line 136 have a specific initial resistance ratio, and when the battery pattern 121 of the pattern group monitored by any one of them is disconnected, it is detected that the resistance is caused by the disconnection. The initial value changes, and the disconnection can be known. The first disconnection detection wiring 135 and the second disconnection detection wiring 136 are required to have a constant resistance ratio as long as they are constant, and the respective resistance values are not particularly limited. That is, it may have the same resistance value and may have different resistance values. However, from the viewpoint of the detection sensitivity, the resistance value of the first disconnection detection wiring 135 and the resistance value of the second disconnection detection wiring 136 are as close as possible. Specifically, the constant resistance ratio is preferably -12 to +12%, preferably -10 to +10%, and more preferably -5 to +5%. In particular, substantially the same resistance value is preferred.

The heater 1 of the first invention and the second aspect of the invention are incorporated in an image forming apparatus, a fixing device, or the like of a printing machine, a photocopier, a facsimile machine, etc., and can be used as a toner and ink. A heater is used for the recording medium. Further, it is possible to use a heating device that is uniformly heated (dried or fired) to a workpiece such as a panel, which is incorporated in a heating machine. Further, heat treatment of the metal product, heat treatment of the coating film formed on the substrate of various shapes, or the film may be suitably performed. Specifically, heat treatment of a coating film (filter material) for a flat panel display device such as a liquid crystal panel, metal products to be coated (whiteboard, etc.), vehicles (automobiles, etc.), wood products, and the like are mentioned. Dry coating, electrostatic flocking followed by drying, heat treatment of plastic processed products, solder reflow of printed circuit boards, and printing and drying of thick film integrated circuits. Furthermore, the structure of the heater of the present invention is not only broken Detection, for example, can of course be applied to short-circuit detection, over-temperature detection, temperature sensors, and the like.

[3] About fixed devices

The fixing device of the present invention is provided with the heater of the present invention. The structure of the fixing device of the present invention can be appropriately selected depending on the use, the means of setting, and the like of the obtained product. For example, when a toner or the like is fixed to the recording medium such as paper, and the plurality of members are bonded to the recording medium such as paper, the heating unit having the heater and the pressurizing unit can be provided. Fixing device. Of course, it can also be used as a means of fixing without pressing. In the present invention, it is preferable to fix the image of the toner including the toner formed on the surface of the recording medium such as paper or film to the fixing device 5 for recording medium.

Hereinafter, the fixing device of the present invention will be described with reference to Figs. 20 and 21 .

FIG. 20 is a schematic view showing a main part of the fixing device 5 disposed in the image forming apparatus of the electrophotographic system, and includes a rotatable fixing roller 51 and a rotatable pressure roller 54 for heating the heater 1 It is disposed in the inside of the fixing roller 51. The heater 1 is desirably disposed so as to be close to the inner surface of the fixed roller 51.

In the fixing device 5 of Fig. 20, the heater 1 is driven by voltage application from a power supply device (not shown), and heat detected by a temperature measuring device (not shown) is transmitted to the fixing roller 51. Then, the recording medium having the unfixed toner image on the surface is supplied to the fixing roller In the pressure contact portion between the fixing roller 51 and the pressing roller 54, the carbon powder is melted to form a fixed image.

In addition, in FIG. 20, since the crimping part of the fixing roller 51 and the pressurizing roller 54 is provided, the fixed roller 51 and the pressurizing roller 54 rotate together in the driving of the fixing device. As described above, the heater 1 suppresses the occurrence of a local temperature rise when a small recording medium is used. Therefore, it is difficult to cause the temperature unevenness of the fixing roller 51 to be smoothly set. Moreover, damage of the member disposed around the heater 1 can be suppressed.

Further, the heater 1 is fixed to the inside of the heater holding portion 53 made of a material which can conduct heat by the heater 1 as shown in Fig. 22, for example, means 5 (fixing means). The inside of the roller 51 is used to conduct the heat caused by the heater 1 to the outer surface.

In addition, FIG. 21 is a schematic view showing a main part of the fixing device 5 disposed in the image forming apparatus of the electrophotographic system, and includes a rotatable fixing roller 51 and a rotatable pressing roller 54. The heater 1 and the pressurizing roller 54 that conduct heat by the roller 51 are pressed together with the pressurizing roller 52 of the recording medium, and are disposed inside the fixing roller 51. The heater 1 is desirably disposed along the inner surface of the fixing roller 51.

In the fixing device 5 of Fig. 21, the heater 1 is driven by voltage application from a power supply device (not shown), and heat detected by a temperature measuring device (not shown) is transmitted to the fixing roller 51. Then, the recording medium having the unfixed toner image on the surface is supplied to the fixing roller 51, and between the pressing roller 54, the fixing roller 51 pressed by the pressing roller 52 and In the crimping portion of the pressurizing roller 54, the carbon powder is melted to form Set the portrait.

In addition, in the driving of the fixing device, the fixed roller 51 and the pressing roller 54 rotate together in the driving of the fixing device. As described above, the heater 1 suppresses the occurrence of a local temperature rise when a small recording medium is used. Therefore, it is difficult to cause the temperature unevenness of the fixing roller 51 to be smoothly set. Moreover, damage of the member disposed around the heater 1 can be suppressed.

As another mode of the fixing device of the present invention, as a metal mold having an upper mold and a lower mold, a heater may be disposed in at least one of the upper mold and the lower mold.

The fixing device of the present invention is an image forming apparatus such as an electrophotographic printer or a photocopier, and is installed in a home appliance, a business, an experimental precision machine, etc., and is suitable for heating, heat preservation, and the like. Heat source.

[4] Portrait forming device

The image forming apparatus of the present invention includes the heater of the present invention. The structure of the image forming apparatus of the present invention can be appropriately selected depending on the use of the product obtained, the purpose of heating, and the like. In the present invention, as shown in FIG. 22, it is characterized in that it is provided with an image forming means for forming an unfixed image on the surface of the recording medium such as paper or film, and a fixing means for fixing the unfixed image to the recording medium. The fixing means 5 includes the image forming apparatus 4 of the heater 1 of the present invention.

Hereinafter, the image forming apparatus of the present invention will be described with reference to FIG. Set.

FIG. 22 is a schematic view showing a main part of the image forming apparatus 4 of the electrophotographic system.

The image forming means may be any one of a method including a transfer drum and a method of not including a transfer drum. However, FIG. 22 is a mode in which a transfer drum is provided.

In the image forming means, while rotating, the charged processing surface of the photosensitive drum 44 charged to a predetermined potential by the charging device 43 is irradiated onto the laser beam output from the laser scanner 41, and supplied from the developer 45. The toner forms an electrostatic latent image corresponding to the image information of the purpose. Next, the toner image is transferred onto the surface of the transfer drum 46 that is linked to the photosensitive drum 44 by the potential difference. After that, the toner image is transferred onto the surface of the recording medium supplied between the transfer drum 46 and the transfer roller 47, and a recording medium having an unfixed image is obtained.

Further, the image forming means may include a cleaning device for removing insoluble toner or the like on the surfaces of the photosensitive drum 44 and the transfer drum 46. However, FIG. 22 does not disclose it.

Further, the carbon powder contains particles in which a resin, a colorant, and an additive are attached, and the melting temperature of the binder resin is usually from 90 ° C to 220 ° C.

In the same manner as the fixing device of the present invention, the fixing means 5 is provided with a pressure roller 54 and a heater holding portion 53 of the heater 1 for holding the paper feed direction. The fixing roller 51 that is pressed by the pressing roller 54. The recording medium having the undetermined image from the image forming means is supplied to the fixing roller 51 and the pressurizing medium. Between the rollers 54, a recording medium in which an image is fixed can be obtained. In other words, the heat of the roller 51 is used to melt the toner image of the recording medium, and the molten toner is pressurized by the pressure roller of the fixing roller 51 and the pressure roller 54, and the toner image is fixed. In the recording media.

In general, the temperature of the fixed roller 51 is uneven, and when the amount of heat imparted to the toner is too small, the toner is peeled off from the recording medium. When the amount of heat is too large, the toner adheres to the fixing roller 51, and the toner is fixed. Although the roller 51 is rotated one turn and attached to the recording medium, the fixing means 5 including the heater of the present invention can quickly adjust the predetermined temperature, thereby suppressing the occurrence of a problem.

In the fixing means 5 of FIG. 22, the fixing roller 51 and the pressing roller 54 are provided. However, the image forming apparatus of the present invention is provided with a fixing belt for the heater 1 close to the fixing. The state of the roller 51.

In the image forming apparatus 4 of Fig. 22, as another means not shown, a recording medium transport means, a control means for controlling the recording medium transport means, and the above means are mentioned.

The image forming apparatus of the present invention is suitable as a printer, a photocopier, or the like that suppresses overheating of a non-paper feed area during use, and is an electrophotographic type.

[5] Heating device

The heating device of the present invention includes a heater portion formed by the heater of the present invention. The structure of the heating device of the present invention can be appropriately selected depending on the shape, size, and the like of the object to be heat-treated. In the present invention, for example, it can be set to It is provided with a frame portion, a closable window portion disposed for entry or exit of the object to be heat-treated, and a movable heater portion disposed inside the frame portion. If necessary, the inside of the frame portion may include a portion to be heat-treated in which the object to be heat-treated is placed, and when the gas is discharged by heating of the object to be heat-treated, the exhaust portion of the gas is discharged, and the internal pressure of the frame portion is adjusted. A pressure adjustment unit such as a vacuum pump. Further, the heating may be performed while the object to be heat-treated and the heater portion are fixed, and may be performed while moving either one.

The heating device of the present invention is suitable as a device for drying a heat-treated material containing water, an organic solvent or the like at a desired temperature. Then, it can be used as a vacuum dryer (pressure reducing dryer), a pressure dryer, a dehumidifying dryer, a hot air dryer, an explosion-proof dryer, and the like. Further, it is also suitable as a device for baking unburned materials such as an LCD panel or an organic EL panel at a desired temperature. Then, it can be used as a reduced pressure firing machine, a pressure sintering machine, or the like.

[Examples]

Embodiments of the invention are described in more detail in the light of the drawings.

<Example> Preparation of heater (refer to Figs. 1 and 6) (1) Formation of insulating layer 141

After smoothing the surface of a stainless steel substrate (manufactured by SUS430) having a length of 520 mm and a width of 1220 mm, the crystallized glass (product name "3500N", manufactured by DuPont) was applied to the entire surface of the substrate 11 after drying to 100 μm. It is fired at 850 ° C and an insulating layer with a film thickness of 85 μm is provided. 141.

(2) Formation of resistance heating wiring 12

Thereafter, the unfired wiring having the pattern shape shown in FIGS. 1 and 6 was printed on the insulating layer 141 using a solder paste containing no lead, cadmium, nickel or silver-palladium, and fired at 850 ° C to obtain Resistance heating wiring 12. Further, the resistance heating wiring 12 has a line width of 0.8 mm and a line thickness of 10 μm.

Further, after printing with silver paste, the wire portion 122 and the island portion 123 for supplying current to the resistance heating wiring 12 are obtained by firing (850 ° C, 30 minutes).

(3) Formation of insulating layer 142

Next, an insulating layer 142 having a film thickness of 50 μm was provided on the entire surface of the substrate including the obtained resistance heating wiring 12 using the same crystallized glass as the insulating layer 141.

(4) Formation of disconnection detection wiring 13

Thereafter, the unfired wiring having the pattern shape shown in FIGS. 1 and 6 was printed on the insulating layer 142 using a solder paste containing no lead, cadmium, nickel or silver-palladium, and fired at 850 ° C to obtain The disconnection detection wiring 13 is provided. Further, the line breakage detection wiring 13 has a line width of 0.8 mm and a line thickness of 10 μm.

Further, after printing with silver paste, the wire portion 133 and the island portion 134 for supplying current to the wire breakage detecting wire 13 are obtained by firing (850 ° C, 30 minutes).

(5) Formation of protective layer and top coat

Next, a protective layer (not shown) having a thickness of 50 μm was provided on the entire surface of the substrate including the obtained disconnection detecting wiring 13 using the same crystallized glass as the insulating layer 141 and the insulating layer 142. Next, amorphous glass (SiO ₂ -Al ₂ O ₃ -B ₂ O ₃ -RO) was applied onto the protective layer, and fired at 750 ° C to provide a top coat layer having a film thickness of 25 μm (not shown). ), the heater 1 is obtained.

In this embodiment, by changing the above-described respective items to the order of (1) → (4) → (3) → (2) → (5), the heater of the form illustrated in Fig. 7 can be obtained. Further, the above-described work is performed in the order of (1) → (4) → (5) on the upper surface side of the base 11, and further, (3) → (2) → (5) on the lower surface side of the base 11. The foregoing process is carried out in order, whereby a heater of the form illustrated in Fig. 8 can be obtained.

Further, in this embodiment, as shown in FIG. 1, the island portion is scattered to the left and right. However, as illustrated in FIG. 2, it may be arranged on one side. At this time, the disconnection detecting wiring 13 can be formed in the pattern shape illustrated in FIG. 2 .

Moreover, in this embodiment, the pattern shape of the resistance heating wiring 12 can be changed as shown in FIG. That is, the parallel battery patterns are arranged side by side with respect to the pattern shape of FIG. 1, and the pattern shape of FIG. 3 is a form in which the sequential battery patterns are arranged side by side. Further, at this time, as illustrated in FIG. 4, the island portions may be collectively arranged on one side.

Further, in this embodiment, the resistance heating wiring 12 can be The pattern shape is changed as shown in FIG. 16 or FIG. That is, the pattern shape of FIG. 1 is formed so as to correspond to the short side and the long side of the base 11, and the sides are orthogonal to each other. In contrast, the pattern shapes of FIGS. 16 and 18 are the short side and the long side of the base 11. The form formed by the angle is added in a non-orthogonal manner. In such a configuration, even if the object to be heated is moved so as to be orthogonal to the short side or the long side of the base 11, it is possible to prevent uneven heating depending on the pattern shape of the resistance heating wiring 12, and it is possible to more integrally Heat up. Moreover, at this time, as illustrated in FIGS. 17 and 19, the island portions can be collectively arranged on one side.

Further, in the battery pattern 121 of FIGS. 16 to 19, the triangular pattern of the battery pattern at both ends is such that the type of the conductive material, the width and the thickness of the pattern are the same as the heat generation characteristics of the other rectangular battery patterns. To control.

In the battery pattern 121 provided in the heater 1 of the above-described FIG. 16 to FIG. 19, the heater 1 of the present invention can be formed in a single battery pattern and has an inclined pattern portion that is obliquely laid (see Figure 16 ~ Figure 19). As described above, the heater having the inclined pattern portion can cover the entire surface of the object to be heat-treated (the object heated by the heater 1 of the present invention) more uniformly than the heater having the inclined pattern portion.

In particular, in the heater 1 of the present invention, when at least one of the object to be heated and the heater 1 of the present invention is swept in a predetermined direction in a state facing the object to be heated, the object to be heated is heated. It is preferable to have a sloped pattern portion. Usually, in such a case, the object to be heated is in a form in which the sweep direction is longer than the heater 1. That is, for example, as shown in FIGS. 23 and 24 For example, the heater 1 has a substantially rectangular shape and has a shape in which the heat-treated product 2 having a length longer than the short side of the heater 1 is heated. In such a case, only the heater 1 faces the object to be thermally treated 2, and since the object 2 to be heated is larger than the heater 1, only a part of the object 2 to be heat-treated can be heated. Therefore, at least one of the object 2 to be heated and the heater 1 of the present invention is swept in a predetermined direction D (hereinafter simply referred to as "sweep direction D"), whereby the entire surface of the object 2 to be heat-treated can be heated.

Here, the battery pattern 121 of the heater 1 illustrated in FIG. 23 is composed of a horizontal pattern portion 127a having an orientation slightly orthogonal to the sweep direction D, and a vertical pattern portion 127b having an orientation slightly parallel to the sweep direction D. Composition. In the battery pattern 121 in this state, a gap between the adjacent vertical pattern portions 127b is formed, and a vertical pattern gap 128 is formed as a portion where the resistance heating wiring 12 is not present.

Then, when the object 2 to be heat-treated is swept in the sweeping direction D, a portion (the portion on the object to be heat-treated 2) facing the horizontal pattern portion 127a and the vertical pattern portion 127b are generated in the object 2 to be heat-treated. The portion facing the continuous face (the portion on the object to be heat treated 2) and the portion facing the vertical pattern gap 128 (the portion on the object 2 to be heat treated). When the heat accumulated in each of the portions to be heat-treated 2 is compared, the portion facing the vertical pattern portion 127b is the largest, the portion continuing to face the horizontal pattern portion 127a is the second largest, and the vertical pattern gap 128 is continued. The facing part is the smallest. That is, although it is a narrow range, there is a possibility that the heat-treated material 2 is unevenly heated. Therefore, when more uniform heating is required for the object 2 to be heat treated, as illustrated in FIG. 24, it is provided for the sweep direction D. It is preferable that the inclined pattern portion 127c is laid obliquely.

The battery pattern 121 of the heater 1 illustrated in Fig. 24 is provided with a horizontal pattern portion 127a having an orientation slightly orthogonal to the sweep direction D, and an inclined pattern portion 127c which is inclined to be laid in the sweep direction D. In the battery pattern 121, a gap between the adjacent inclined pattern portions 127c is formed, and an inclined pattern gap 129 is formed as a portion where the resistance heating wiring 12 is not present. However, the inclined pattern portion 127c and the inclined pattern gap 129 are also disposed obliquely with respect to the swept direction D of the object 2 to be heated. Therefore, even if the object 2 to be thermally swept is swept in the sweeping direction D, neither the inclined pattern portion 127c nor the inclined pattern gap 129 will generate a portion on the object 2 to be continuously faced. That is, any of the pattern portions will face the object 2 to be heated equally. As a result, the heat accumulated in the respective portions of the heat-treated material 2 is equalized, and a more uniform heating can be performed.

Further, when the heater 1 of the present invention faces the object to be heated 2, the effect of the above-described action provided by the inclined pattern portion can be remarkably exhibited. In particular, when the heater 1 of the present invention is in contact with the object 2 to be swept, the above-described effects and effects are particularly remarkable. In other words, when the heater 1 and the object 2 to be heated of the present invention are largely separated, heat generated from the resistance heating wire is diffused into a radial shape, and when the heat reaching the object 2 is homogenized, even if the vertical pattern portion 127b and the vertical are present The pattern gap 128 (refer to FIG. 23) also makes it difficult to generate heating unevenness.

However, when the heater 1 of the present invention is close to the object 2 to be heated, in particular, when the heaters 1 are in contact with each other, the above-described homogenization is difficult to achieve, and heating unevenness is likely to occur in the object 2 to be heated. Therefore, the heater that is connected to the object 2 to be swept In particular, it is preferable to have a tilt pattern portion.

Further, the inclined pattern portion 127c may be inclined to any extent, but for example, the horizontal pattern 127a is preferably 10 to 80 degrees, more preferably 20 to 70 degrees.

Further, in this embodiment, as shown in FIG. 5, the sensing portion 131 of the disconnection detecting wiring 13 can be converged in the region of the outer shape of each of the battery patterns 121 of the resistance heating wiring 12 (see FIG. 12). And it is formed so as not to overlap with the projection image of the wiring of each battery pattern 121.

Further, in this embodiment, the pattern shape of the resistance heating wiring 12 can be changed as shown in FIG. 13, and as shown in FIG. 13, individual disconnection detecting wirings 135 and 136 are provided in each pattern group as The heater of the second invention. Furthermore, as shown in FIG. 14, the pattern shape can be changed. Further, as shown in FIG. 15, the sensing portion 131 of the disconnection detecting wiring 13 can be converged in the region of the outer shape of each of the battery patterns 121 of the resistance heating wiring 12 (see FIG. 12), and The projection images of the wirings of the battery pattern 121 are formed to overlap each other.

Further, the present invention is not limited to the specific embodiments described above, and various modifications can be made within the scope of the present invention depending on the purpose and application.

1‧‧‧heater

11‧‧‧ base

12‧‧‧Resistive heating wiring

121‧‧‧ battery pattern

122‧‧‧Wire section

123‧‧‧ Island Department

13‧‧‧Disconnection detection wiring

133‧‧‧Wire Department

134‧‧‧ Island Department

141,142‧‧‧Insulation

Claims (11)

A heater includes a base, a resistance heating wiring disposed on the base, and a heater insulated from the resistance heating wiring and disposed on the base of the disconnection detecting wiring, wherein the resistance heating wiring is The plurality of battery patterns have substantially the same heat generation characteristics and are electrically connected in parallel with each other; and the disconnection detection wiring has a sensing portion that changes in resistance depending on temperature, and corresponds to each of the battery patterns, and The sensing portions are electrically connected to each other to form an integrated wiring. The disconnection detecting wiring is caused by a change in temperature due to a temperature change due to the disconnection when any of the battery patterns is disconnected. The heater according to the first aspect of the invention, wherein the battery pattern is formed using a conductive material that changes in resistance depending on temperature, and the conductive material constituting the sensing portion is formed as described above. The conductive material of the battery pattern has a large temperature coefficient of resistance. The heater according to the first or second aspect of the invention, wherein the sensor unit is disposed in a region outside the battery pattern. The heater according to claim 1 or 2, wherein in the state facing the object to be heated, at least one of the object to be heated and the heater is swept in a predetermined direction, a heater for heating the object to be heated; The battery pattern is formed in one battery pattern and has an inclined pattern portion that is laid obliquely to the predetermined direction. A heater includes a base, a resistance heating wiring disposed on the base, and a heater that is insulated from the resistance heating wiring and disposed in the plurality of disconnection detection wirings of the base, and is characterized in that the resistance heating wiring The plurality of battery patterns have substantially the same heat generation characteristics and are electrically connected in parallel with each other. Further, the resistance heating wiring has a first pattern group and a battery pattern defined by the battery pattern. And the second pattern group has substantially the same heat generation characteristics as the first pattern group, and is formed by a predetermined number of battery patterns; and the first disconnection detection line in the disconnection detection line is configured accordingly Each of the battery patterns of the first pattern group has a sensing portion that changes in resistance value depending on temperature, and the sensing portion is electrically connected to each other as an integral wiring; and the second disconnection detecting wiring in the disconnection detecting wiring is Each of the battery patterns constituting the second pattern group has a sensing portion that changes in resistance depending on temperature, and the sensing portions are mutually Electrically connected to the integrated wiring; when at least one of the battery patterns is disconnected, the first disconnection detecting wiring and the second disconnecting detecting wiring are generated due to a temperature change of the battery pattern due to disconnection The change in resistance ratio. The heater according to claim 5, wherein the battery pattern is changed depending on a temperature and a resistance value is changed. The conductive material is formed, and the conductive material constituting the sensing portion is larger in temperature coefficient of resistance than the conductive material constituting the battery pattern. The heater according to claim 5, wherein the sensing portion is disposed in a region outside the battery pattern. The heater according to the fifth or sixth aspect of the invention, wherein, in a state facing the object to be heated, at least one of the object to be heated and the heater is swept in a predetermined direction, The heater that heats the object to be heated; the battery pattern is in one battery pattern, and has an inclined pattern portion that is laid obliquely to the predetermined direction. A fixing device characterized by comprising the heater according to the first or fifth aspect of the patent application. An image forming apparatus comprising the heater according to the first or fifth aspect of the patent application. A heating device characterized by comprising the heater according to the first or fifth aspect of the patent application.