JPH08124660A - Heater and bookbinding device - Google Patents

Abstract

PURPOSE: To provide a heater with electrical safety and stable feeding performance by arranging a current heating resistor in the longitudinal direction of a plate ceramic base material and coating an appearance portion in all area except for a feeding portion at the longitudinal end with an elastic member. CONSTITUTION: A current heating resistor 2 is arranged on the surface in the longitudinal direction of a ceramic substrate 1 and a feeding portion 2a is formed at the longitudinal end to obtain a heating area. The current heating resistor 2 can be formed by pattern-printing Ag/Pd paste into a strip shape with screen printing and then firing and, if required, can be provided in plurals on the face and back of the substrate. An elastic layer 3 formed of insulating material is formed in all appearance area, where the feeding portion 2a in the heating area is exposed, for coating. The material of the elastic layer 3 is preferably rubber or plastic with Si or F as base material. A heater obtained in such a way is suitable as a heating member for a bookbinding means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater for heating a material to be heated by heating means having ceramics as a base material, and more specifically to an image forming apparatus utilizing the heater heating means or a bookbinding apparatus such as an online finisher. The present invention relates to a heater that constitutes a bind tape heating device used in a bookbinding device or the like that glues an image forming sheet to be used for bookbinding.

[0002]

2. Description of the Related Art Conventionally, a heater used as a heating means has a heating means such as a nichrome wire or the like for heating inside a heating medium made of metal such as aluminum having good heat conductivity or stainless steel having good heat storage. It was housed via an insulator.

On the other hand, as a ceramic heater, a heater formed by printing a heating resistor on the surface of a thin ceramic plate has been put to practical use in a fixing device of an image forming apparatus. Since this ceramic heater has an extremely small heat capacity and excellent thermal efficiency peculiar to ceramics, it heats up when energized and immediately heats up to the operating temperature and rises in temperature. The device can be provided. Therefore, it is known that it is unnecessary to constantly adjust the temperature to a constant temperature and stand by, and power saving can be realized.

In the embodiments of the present invention described below,
In the case where the operation of gluing a plurality of image-formed sheets to perform bookbinding is continuously and automatically performed, an online device in which a plurality of devices for performing necessary jobs are connected to each other is used.

For example, the above-mentioned on-line device is a reading / feeding device that includes a document setting unit for setting a document, an optical system for scanning the document, and a sheet feeding unit for storing a large number of sheets and feeding them. A device, an image forming device that forms an image of a fed sheet, a bookbinding device that binds an image-formed sheet, and a sorting device that sorts and stores a finished bound product or a single sheet are sequentially connected. Made of things.

[0006] When binding in a bookbinding apparatus, there is a gluing binder for gluing and binding the aligned sheet bundle in the sheet alignment tray. The bind tape used for this is a hot melt type, and is heated by a tape heating device including a heater to paste the sheet bundle.

Further, the sheets are stored in one aligning tray, and the sheets are aligned by abutting against the abutting member.
The sheet bundle and the bind tape abutting on the sheet bundle are heated by one tape heating means.

[0008]

However, the heater having the above-described structure has a large heat capacity as a whole, and the heater in the cold state contacts the bind tape as the member to be heated after the heating wire is energized. A considerable waiting time (wait time) was required until the outside heating medium portion for heating the tape was heated to a predetermined tape heating temperature.

Further, in order to enable bookbinding processing immediately at any time, it is necessary to constantly energize the heating wire to keep the heater at a predetermined constant temperature and stand by even when the apparatus is not used. Yes, so it was uneconomical in terms of power consumption.

The ceramic heater is used as a sheet heating element by forming a thin plate and printing a resistance heating element on the surface. However, since it is thin, its mechanical strength is weak and it is easily broken by a slight external force. there were. Therefore, a holding member for reinforcement is provided as a stay on the side opposite to the use surface. However, when trying to provide a sturdy stay, a large amount of heat is taken from the heater, the amount of heat for actual use becomes insufficient, efficiency deteriorates, and rapid heating takes time. .

Further, the surface of the heating surface of the heater is easily soiled, and it takes time and effort to remove it if an adhesive or the like adheres to the surface. In addition, if it is inadvertently used as it is, the bookbinding product may be soiled or cause a malfunction.

According to the conventional example, in the case of performing the gluing action, in a practically used product, there is a heater holder having a high heat capacity provided as a separate member for disposing the heater in the vicinity. There is a heater holder with a fluorine coating on the surface used, but in order to remove the adhered adhesive,
Since the cleaning work must be performed after the power is turned off and the power is naturally cooled to a safe temperature, the downtime of the machine device is prolonged, and the maintenance cost is large.

On the other hand, the ceramic heater uses a thin ceramic plate such as alumina or nitrogen aluminum as a heater substrate, and Ag / Pd is formed on the surface of the ceramic substrate.
(Silver palladium), RuO ₂ , Ta ₂ N, or other electric resistance material paste is pattern-printed by screen printing or the like and fired to form an energization heating resistor. It causes heat.

Such a ceramics heater is used as a heating body (heater) of a film heating type image fixing device of an image forming apparatus (Japanese Patent Laid-Open No. 63-313182).
Japanese Patent Laid-Open No. 2-157878 / Japanese Patent Laid-Open No. 4-4
Nos. 4075-44083 and JP-A-4-204980.
No. 204984).

The ceramic heater has a small heat capacity as a whole, and has excellent thermal efficiency peculiar to ceramics, and the entire ceramic substrate including the electric heating element is immediately heated to the working temperature and heated at the time of energization. The time from reaching to the predetermined constant temperature control temperature is almost unnecessary,
It is possible to provide a device without wait time. Then, it becomes unnecessary to constantly adjust the temperature to a constant temperature and stand by, and power saving can be realized.

However, 1. The ceramic heater has a thin heater substrate (ceramic substrate), and has a weak mechanical strength, and is easily broken by external force.

2. The surface of the ceramics easily gets dirty, and as a heater of the binding tape heating device of the bookbinding device of the above-mentioned example,
When the ceramic heater is used as it is and the binding tape as an adhesive is directly brought into contact with the heater surface and heated, a part of the heat-melted binding tape easily adheres to the heater surface and is easily soiled with the adhesive. , Its removal takes time. Also, if the product is inadvertently left in the dirty state, it may stain the bound product or cause a malfunction.

3. In order to prevent the adhesive from directly adhering to the surface of the ceramics heater and to improve the mechanical strength of the heater, a heater plate made of a metal member such as aluminum is provided on the side of the ceramics heater facing the bind tape. I tried to make one with a different composition.

When the aluminum plate and the ceramic heater are adjacent to each other, safety standards such as the Electrical Appliance and Material Control Law, IEC standards (International Electrotechnical Commission), UL / CSA standards, etc. 2 of fear
It is stipulated that the creeping distance between conductors and the space distance between conductors should be fixed between the next circuit and a person or between different charging parts. In addition, a considerable amount of voltage is applied to the ceramics heater in order to generate an amount of heat equivalent to, for example, 1000 W, and if the heater plate in the vicinity is conductive, the user can easily touch it. Very dangerous if configured. However, when a space is opened, the efficiency of heat transfer to the outer surface through the space is reduced, and the amount of heat required by the tape heating device is applied to the heated member such as the bind tape in a stable state in a short time. This made it difficult to operate the bookbinding device in a stable manner.

Therefore, an object of the present invention is to show the structure of a tape heating device capable of stably supplying heat while considering an electrical safety problem, and to bind the binding tape in the bookbinding device as described above. It is an object of the present invention to provide a heater suitable for a heater of a heating device, a heater of a laminating device, a heat sealing device, and the like, and a device using the heater.

[0021]

In order to achieve the above object, in the present invention, (1) a plate-shaped ceramic substrate, a heating portion in which an electric heating resistor is arranged in the longitudinal direction thereof, and a longitudinal end Has a power feeding portion formed on the bottom portion, and the elastic material layer is formed and covered over the entire appearance portion where the power feeding portion is exposed, thereby protecting the brittleness of ceramics and a cushioning material between other members. It is characterized by that.

(2) Since the elastic body layer is closely adhered to and covers the entire appearance portion excluding the power feeding portion, and the elastic body layer is formed of a material having an insulating property and a thermal conductivity, It is characterized by satisfying various safety standards and efficiently heating the heat of the ceramics heater.

(3) When the elastic layer is made of silicon or fluorine-based rubber or plastic, a flame-retardant and thermally stable layer can be formed.
It is characterized by being able to withstand thermal deterioration and thermal shock.

(4) A heater in which the plate-shaped ceramic base material and a heat generating portion in which a current-carrying heat generating resistor is disposed in the longitudinal direction are closely formed in close contact with each other. By forming the conductor line of the energization heating resistor of one line or a plurality of lines between the power feeding parts, the temperature balance of the ceramic surface is made smoother, and the temperature rise is heated by the elastic layer. It is characterized by being made stable as a capacitor.

(5) A heater in which the plate-shaped ceramic base material and a heat generating portion in which a current-carrying heat-generating resistor is arranged in the longitudinal direction thereof are in close contact with each other and are integrally formed. The electric heating resistors of the heater formed by the conductor lines of the electric heating resistors of one line or a plurality of lines between the power feeding parts are formed on both sides of the plate thickness direction of the plate ceramic substrate. As a result, the ceramic heater is characterized in that it is possible to suppress dimensional warpage due to thermal shock generated during rapid heating.

(6) By forming the heater in which the elastic layer is formed on a thin metal plate in close contact, the elastic body absorbs variations in dimensions and is always buffered even when deformed by external pressure. It is characterized in that the elastic layer is absorbed and in close contact, and that the thin metal plate also serves as reinforcement of the ceramics.

(7) The above-mentioned heater is provided as the heating means of the bookbinding binding means, so that it is thermally efficient and consumes a minimum amount of electric power.

[0028]

【Example】

<Example 1> (Figs. 1 to 3) (1) Bind tape heating device in bookbinding device Fig. 1 is a schematic view of a main part of a tape heating device portion in the above-described bookbinding device. Reference numeral 1A denotes a main heater, which is a horizontally long member having a length in a direction perpendicular to the plane of the drawing. The main heater 1A is mounted and held on a fixed heater holder 6 made of sheet metal via a heat insulating member 5. The heat insulating member 5 is, for example, PPS (polyphenylene sulfide), PAI.
(Polyamide imide), PI (polyimide), PEEK
(Polyether ether ketone), a high heat resistant resin such as a liquid crystal polymer, or a composite material of these resins and ceramics, metal, glass or the like.

Sub heaters 1B and 1C are arranged above and below the main heater 1A, and these are also laterally long members whose longitudinal direction is perpendicular to the plane of the drawing. These sub-heaters 1B and 1C are attached and held to movable heater holders 7 and 8 made of sheet metal via a heat insulating member 5, respectively. The movable heater holders 7 and 8 at the upper and lower parts are position-moved by a moving mechanism (not shown), as will be described later, and are normally on standby with the position shown in FIG. ing. The structure of the heaters 1A, 1B and 1C will be described later.

Numerals 9 and 10 are bind tape chucks arranged on the upper and lower portions of the front side of the main heater 1A, and hold the bind tape T of the main heater 1A by gripping the upper and lower sides of the hot melt type bind tape T. Position and hold on the front side. Bind tape chuck 9 ・ 10
The supply and setting of the bind tape T to and from are performed by an automatic device (not shown).

Then, sheets are sequentially sent from an image forming apparatus such as a copying machine or a printer (not shown) to an aligning tray (not shown) of the bookbinding apparatus, and a stack of a predetermined plurality of sheets is stacked and aligned. The aligned sheet bundle S is gripped by a movable gripping member (not shown) and conveyed to the sheet bundle stage 11 of the tape heating device without breaking the aligned state, and the sheet bundle S on the side to be glued is processed. The end face is shown in Fig. 1 (a).
As described above, the state is pressed against the surface of the main heater 1A via the bind tape T held by the bind tape chucks 9 and 10.

The bind tape T pressed against the surface of the main heater 1A is heated by energization and is heated by the heat of the main heater 1A which has been heated to a predetermined temperature (for example, 100 to 160 ° C.), so that the end surface of the sheet bundle S is heated. Heat weld.

Next, the upper and lower sub-heater holders 7 and 8 are controlled to move forward in the direction of arrow a ahead of the main heater 1A. By the forward movement a of the upper and lower sub-heater holders 7 and 8, the upper and lower bind tape chucks 9.1
When 0 is pushed and moved, and the support shafts 9a and 10a are pivoted forward as shown in FIG. 1B, the binding tape T is automatically gripped by the chucks 9 and 10. It will be canceled.

The longitudinal upper side portion (upper side ear portion) and the longitudinal lower side portion (lower side ear portion) of the tape T whose grip by the chucks 9 and 10 has been released are respectively located at the upper and lower sub heaters 1B and 1B.
The surface C is folded back in the forward direction of the heater, and then the upper and lower sub-heater holders 7 and 8 are controlled to move in the directions b and c that sandwich the sheet bundle S with each other, whereby the bind tape T is folded back. The upper edge and the lower edge are pressed against the upper edge and the lower edge of the sheet bundle S, respectively, and the respective edges generate heat by energization to raise the temperature to a predetermined temperature (for example, 100 to 160 ° C). The heat of the sub-heaters 1B and 1C of these parts causes the sheet bundle S to be heat-welded to the upper surface edge and the lower surface edge.

After that, the sub heater holders 7 and 8 are controlled to move in the reverse order of the above-described movement control, and return to the first home position of FIG. 1A and stand by.

Next, the gripping of the sheet bundle S by the gripping member is released, and the bound sheet bundle S glued with the bind tape T as shown in FIG. 2 is transferred from the bind tape heating device (not shown) by a transfer means (not shown). It is discharged to the stocker.

Then, the above jobs are repeatedly executed, and the sheet bundles aligned on the alignment tray are sequentially bound.

(2) Heaters 1A, 1B, 1C Since the main heater 1A and the sub-heaters 1B, 1C have basically the same structure, the main heater 1A will be mainly described.

FIG. 3A is a perspective view of the main heater 1A with the middle part omitted, and FIG. 3B is the main heater 1A including the heater plate 4, the heat insulating member 5, and the heater holder 6.
FIG. 3 is an enlarged cross-sectional model view of

Reference numeral 1 is a ceramic substrate (ceramic base material) as a heater substrate. For example, length of 300m
m, width 10 mm to 20 mm, thickness about 1 mm alumina substrate.

Reference numeral 2 is an energization heating resistor formed by screen printing and firing in a strip shape along the length of the substrate at the substantially central portion of one surface of the ceramic substrate 1. For example, A
Width of 1 to 5m with g / Pd paste by screen printing
It is formed by pattern-printing in a strip shape with a thickness of m and a thickness of 10 μm and firing. Feeding electrode patterns (feeding portions) 2a, 2a are formed at both longitudinal ends of the energization heating resistor 2.

Reference numeral 3 substantially covers the entire outer surface of the ceramic substrate 1 (ceramic heater) including the energization heating resistor 2 (both the front and back surfaces of the ceramic heaters 1 and 2 and the heaters on both longitudinal end surfaces in this example). It is an insulating member layer (elastic body layer) that is adhered and covered. The insulating member layer 3 is made of a material such as silicon rubber or fluororesin, which has insulating properties, heat resistance, and excellent thermal conductivity, and is heat-resistant adhesive such as silicon to the outer surface of the ceramic heaters 1 and 2. It is adhered in a state in which it is adhered with an agent.

The thickness t of the insulating member layer 3 is specified to be a certain thickness or more in safety standards, while the thickness t is such that the performance of the tape heating device itself is not deteriorated. In this embodiment, 0.5 mm
Set to about.

In this embodiment, the heater 1A in which the ceramic heaters 1 and 2 are covered with the insulating member layer 3 is the heater holder 6 via the heat insulating member 5 with the surface of the ceramic substrate 1 on which the energization heating element 2 is formed by printing as the back surface. A heater plate made of a metal member such as aluminum in close contact with the heater 1A. 4 is provided.

When electricity is applied between the electrodes 2a, 2a as power feeding parts at both longitudinal ends of the energization heating resistor 2 of the ceramic heaters 1 and 2, the energization heating resistor 2 generates heat over the entire length and is transmitted to the ceramic substrate 1 and the ceramics. The entire temperature of the heaters 1 and 2 rapidly rises. This ceramic heater 1
The heat of 2 is conducted to the heater plate 4 through the insulating member layer 3 to heat the heater plate 4. Although not shown in the figure, the temperature rise of the ceramic substrate 1 or the heater plate 4 of the ceramic heaters 1 and 2 is detected by the temperature detecting element,
The detected temperature information is fed back to the temperature control circuit, and the energization of the energization heating resistor 2 is controlled so that the detected temperature of the temperature detecting element becomes a predetermined constant, and the temperature of the ceramic heaters 1 and 2 or the heater plate 4 is predetermined. Is controlled to the temperature of.

Then, the bind tape T as a member to be heated is brought into contact with the outer surface of the heater plate 4 to heat and melt the bind tape T.

The structure of the sub-heaters 1B and 1C is basically the same as that of the main heater 1A. Since the entire outer surface of the ceramic heaters 1 and 2 is practically covered with the insulating member layer 3 so as to be closely covered, the strength of the ceramic heaters 1 and 2 is reinforced.

Since the insulating member layer 3 is made of a material having excellent thermal conductivity, the heat of the ceramic heaters 1 and 2 is transferred to the outside through the insulating member layer 3 without deteriorating the thermal conductivity. Ceramic substrate 1 of energization heating element 2 which is
It became possible to transfer heat evenly regardless of the position on the surface.

Since the heat of the ceramic heaters 1 and 2 is transferred to the outside through the insulating member layer 3, the heat can be averaged and transferred to the outside regardless of the shape of the electric heating element 2 which is a heating element. It has become possible.

The insulating member layer 3 can ensure the insulation required for electrical safety. Therefore, even if the heater plate 4 made of a metal member such as aluminum is closely attached to the ceramic heaters 1, 2, and 3 with the insulating coating, it is possible to provide the heater plates 4 with insulation without any electric safety problem. Further, the strength of the ceramic heater is further reinforced by the heater plate 4, and the heat of the ceramic heaters 1 and 2 is efficiently transmitted to the outer heater plate 4 via the insulating member layer 3.

The heater plate 4 made of a metal member such as aluminum is a binding tape T which is an adhesive agent which is melted by heat.
To prevent a part of it from adhering to the heater surface.

The heater plate 4 is set to have a small thickness (eg 0.3 m) so as not to impair the reinforcing effect of the heater.
In this case, the insulating member layer 3 is formed on the ceramic heater by
Even if the heater plate 4 is present, the heat capacity of the entire heater including the insulating member layer and the heater plate is kept small, and the weight of the weight is maintained without substantially impairing the rapid temperature rise characteristic of the ceramic heater itself. It is possible to configure a timeless device. Therefore, it is unnecessary to constantly adjust the temperature to a constant temperature and stand by, and power saving can be realized.

Since the heater has a small heat capacity, unlike the above-mentioned heater having a large heat capacity, the adhesive is not substantially adhered, and even if the adhesive is adhered, the power is turned off to naturally cool it to a safe temperature to the touch. It takes only a short time to perform maintenance.

<Embodiment 2> (FIGS. 4 and 5) In the embodiment of FIG. 4, the heater 1A (1B, 1C) in which the ceramic heaters 1 and 2 are covered with the insulating member layer 3 is energized to the ceramic substrate 1. The surface on which the heating element 2 is formed by printing is used as a surface and is attached and held to the heater holder 6 via the heat insulating member 5 (the energization heating resistor 2 is formed on the ceramic substrate surface facing the member to be heated T). A heater plate 4 made of a metal member such as aluminum is provided in close contact with the heater 1A (1B, 1C).

In the embodiment of FIG. 5, two electric heating resistors 2 are arranged in parallel on the surface of the ceramic substrate.
The entire outer surface of the ceramic heaters 1 and 2 is covered with the insulating member layer 3
Since the structure is substantially covered with and adhered to the surface of the ceramic substrate 1, the heat generation state on the surface of the insulating member layer 3 (temperature The distribution) can be obtained in a stable state without largely changing, and various configurations of the energization heating resistor 2 can be adopted.

The energization heat generating resistor 2 may be formed and provided on both sides of the ceramic substrate 1. The energization heat-generating resistor 2 may be formed and provided with a waveform, a sawtooth pattern, or the like other than the linear strip-shaped pattern.

The heater and the heater device of the present invention are the binding tape heating device in the bookbinding device as in the embodiment.
Other than the heater, for example, a laminating device, a heat sealing device, or the like can be preferably used as the heater.

[0058]

As described above, according to the present invention, (1) a plate-shaped ceramic base material, a heat generating portion in which an electric heating resistor is arranged in the longitudinal direction thereof, and a power supply formed at the longitudinal end portion. By forming and covering an elastic body layer on the entire appearance part where the power feeding part is exposed, the brittleness of the ceramics is protected and the cushioning material between other members is provided. , Prevention of damage to ceramics, scratches on energization heating resistors,
It has become possible to prevent friction marks. In addition, it is possible to prevent ceramic fragments from escaping even if they are damaged during handling during manufacturing and assembly.
And so on.

(2) Since the elastic body layer is closely adhered to and covers the entire appearance portion excluding the power feeding portion, and the elastic body layer is made of a material having an insulating property and a thermal conductivity, By satisfying various safety standards and efficiently heating the heat of the ceramics heater, it is possible to form a thermal capacitor and obtain a stable heat supply.

(3) When the material of the elastic layer is made of rubber or plastic having silicon or fluorine as a base material, a flame-retardant and thermally stable layer can be formed, which is resistant to thermal deterioration and thermal shock. As a result, it is possible to provide a heater that is safe and reliable even in long-term use.

(4) A heater in which the plate-shaped ceramic base material and a heat generating portion in which a current-carrying heat generating resistor is disposed in the longitudinal direction are closely formed integrally with each other. By forming the conductor line of the energization heating resistor of one line or a plurality of lines between the power feeding parts, the temperature balance of the ceramic surface is made smoother, and the temperature rise is heated by the elastic layer. By making it stable as a capacitor, it was possible to provide a heater with low ripple and easy temperature control, which made it possible to apply it to devices that require precise temperature control, and to use multiple heater heating resistors. By using it, more rapid heating became possible, and the effect that the wait time approached to 0 was infinitely obtained.

(5) A heater in which the plate-shaped ceramic base material and a heat generating portion in which a current-carrying heat generating resistor is disposed in the longitudinal direction thereof are integrally formed in close contact with each other. The current-carrying heating resistor of the heater formed by the conductor lines of the current-carrying heating resistor of one line or a plurality of lines between the parts is formed on both sides of the plate-shaped ceramic substrate in the plate thickness direction. As a result, it is possible to minimize the occurrence of dimensional warpage in the ceramic heater due to the thermal shock that occurs during rapid heating, which minimizes the distortion of the heater that occurs during heating. It is possible to provide a ceramic heater with high accuracy and rapid heating that can guarantee accuracy by temperature control even for devices that require high temperature.

(6) Since the heater having the elastic layer formed on the thin metal plate is adhered to the thin metal plate, the elastic body absorbs variations in dimensions and is always buffered even when deformed by external pressure. The elastic layer absorbs and adheres to each other, and the thin metal plate also serves as a reinforcement for the ceramics, which makes it possible to increase the strength of the surface, ensure the smoothness of the surface, and ensure the flatness. In addition, the effect of protection against damage can be obtained.

(7) By providing the above-mentioned heater as the heating means of the bookbinding binding means, it is possible to provide a bookbinding apparatus which is highly heat efficient and consumes only a minimum amount of electric power, so that it is highly productive. The effect was obtained.

(8) With regard to the ceramics heater and the apparatus using the heater, the features such as the quick start property and the power saving property inherent to the ceramics heater are substantially maintained.
Moreover, the heater of the bind tape heating device in the bookbinding device, which is capable of stably supplying heat by solving the problems of mechanical strength and dirt of the heater while considering the electrical safety problem, etc. It is possible to configure a heater suitable as a heater in a laminating apparatus, a heat sealing apparatus, etc., and an apparatus using the heater.

[Brief description of drawings]

1A and 1B are schematic diagrams of a main part of a tape heating device portion of a bookbinding apparatus according to a first embodiment, in which FIG. 1A is a state diagram when a sub-heater stands by at a home position, and FIG. State diagram when movement is controlled to the heating position

FIG. 2 is a perspective view of a bound sheet bundle.

FIG. 3A is a perspective view of the main heater with an intermediate part omitted.
(B) is an enlarged cross-sectional model view of the main heater including the heater plate, the heat insulating member, and the heater holder.

FIG. 4 is a heater plate of the device of Example 2, a heat insulating member,
Enlarged cross-sectional model view of the main heater including the heater holder

FIG. 5 is a heater plate of another device, a heat insulating member,
Enlarged cross-sectional model view of the main heater including the heater holder

[Explanation of symbols]

 1A Main heater 1B ・ 1C Sub heater 1 Ceramics substrate (heater substrate) 2 Electric heating resistor 3 Insulating member layer 4 Heater plate 5 Heat insulating member 6/7/8 Heater holder 9/10 Bind tape chuck 11 Sheet bundle stage S Sheet bundle T Bind tape

Claims (7)

[Claims] 1. A plate-shaped ceramic base material, a heat generating portion in which an electric heating resistor is arranged in the longitudinal direction thereof, and a power feeding portion formed at the longitudinal end portion, and the power feeding portion is exposed over the entire external portion. A heater comprising an elastic layer formed and covered. 2. An elastic body layer is closely adhered to and covers the entire appearance portion except the power feeding portion, and the elastic body layer is formed of a material having an insulating property and a thermal conductivity. The heater according to Item 1. 3. The heater according to claim 1, wherein the material of the elastic layer is made of silicon or fluorine-based rubber or plastic. 4. A heater in which the plate-shaped ceramic base material and a heat generating portion in which a current-carrying heat-generating resistor is arranged in the longitudinal direction are in close contact with each other and are integrally formed, and the current-carrying heat-generating resistor is the power supply. The heater according to any one of claims 1 to 3, wherein the heater is formed by one line or a plurality of lines of conductor lines of the energization heating resistor between the portions. 5. A heater in which the plate-shaped ceramics base material and a heat generating portion in which a current-carrying heat generating resistor is disposed in the longitudinal direction are in close contact with each other and integrally formed, and the current-carrying heat generating resistor is the power supply. Conductor heating resistors of a heater formed by one line or a plurality of conductor lines of conducting heaters between parts are formed on both sides of the plate-shaped ceramic substrate in the plate thickness direction. The heater according to any one of claims 1 to 3, characterized in that. 6. The heater according to any one of claims 1 to 5, wherein a heater in which the elastic layer is formed is closely attached to a thin metal plate. 7. A bookbinding apparatus comprising the heater according to claim 1 as a heating member of bookbinding binding means.