JP4402999B2 - Recording medium erasing apparatus and recording erasing method - Google Patents

Recording medium erasing apparatus and recording erasing method Download PDF

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JP4402999B2
JP4402999B2 JP2004094440A JP2004094440A JP4402999B2 JP 4402999 B2 JP4402999 B2 JP 4402999B2 JP 2004094440 A JP2004094440 A JP 2004094440A JP 2004094440 A JP2004094440 A JP 2004094440A JP 4402999 B2 JP4402999 B2 JP 4402999B2
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temperature
resistor
recording medium
erasing
heating
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JP2005262850A (en
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秀夫 谷口
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秀夫 谷口
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Priority to AT05250909T priority patent/ATE427219T1/en
Priority to US11/061,856 priority patent/US7206009B2/en
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本発明は、たとえば加熱素子により加熱して化学変化させ、それにより発色、消色をさせ得る可逆性感熱記録(リライタブル)材料が施されたカードなどの特殊な記録媒体の記録を消去する場合や、熱転写法によりアンダーコートやオーバーコートをする場合の記録媒体の記録消去装置および記録消去方法に関する。さらに詳しくは、記録消去などの使用時のみに加熱ヘッドの駆動スイッチをオンにし、使用しないときにはオフにしながら、短時間で動作し、しかも確実に消去などの必要な温度にして作業をし得る記録媒体の記録消去装置および記録消去方法に関する。 The present invention, for example, when erasing a record on a special recording medium such as a card provided with a reversible thermosensitive recording (rewritable) material that can be chemically changed by heating with a heating element, thereby causing color development and color erasing. The present invention relates to a recording medium erasing apparatus and a recording erasing method for undercoating or overcoating by a thermal transfer method. More specifically, to turn on the drive switch of the heating head only when using such recording and erasing, while off when not in use, to operate in a short time, and reliably record that can work with the required temperature, such as erasure The present invention relates to a medium recording / erasing apparatus and a recording / erasing method.

リライタブルカードなどの熱可逆性記録媒体は、ある温度以上に加熱することにより発色し、発色温度よりも低い温度に上昇させることにより消色される。たとえば図１０に一例の記録媒体の発色、消色と温度との関係が示されるように、Ｔ４（１８０℃）以上の温度にすることにより発色するため、所望の文字や画像の部分の温度をＴ４以上に加熱し、その後、Ｔ１（８０℃）以下に急冷することにより、所望の画像を記録することができる。この発色した記録は、Ｔ２（１２０℃）〜Ｔ３（１６５℃）の範囲に加熱することにより完全に消色する。この場合、Ｔ１（８０℃）〜Ｔ２の温度では部分的に消色され、一部記録が残ることになり、また、温度がＴ３〜Ｔ４（１８０℃）に上げ過ぎると、再度発色し、完全な消色にはならない。したがって、消色する場合や発色させる場合の温度制御は非常に重要である。なお、図１０において、Ｔ０（２５℃）〜Ｔ１は加熱冷却、急冷徐冷に関係なく濃度の変化がない領域で、加熱温度Ｔ５（２００℃程度）以上で発色させると消色した場合に、変色して完全に消色することができない。上記数字で示した具体的温度は記録媒体により変り、一例の記録媒体における温度の例である。   A thermoreversible recording medium such as a rewritable card develops color when heated to a certain temperature or higher, and is erased by raising the temperature to a temperature lower than the color development temperature. For example, as shown in FIG. 10 showing the relationship between color development / decoloration and temperature of an example recording medium, color is developed by setting the temperature to T4 (180 ° C.) or higher. A desired image can be recorded by heating to T4 or higher and then rapidly cooling to T1 (80 ° C.) or lower. The colored record is completely erased by heating in the range of T2 (120 ° C.) to T3 (165 ° C.). In this case, the color is partially erased at a temperature of T1 (80 ° C.) to T2, and a part of the recording remains, and when the temperature is excessively raised to T3 to T4 (180 ° C.), the color is developed again and is completely It will not be discolored. Therefore, temperature control when erasing or developing color is very important. In FIG. 10, T0 (25 ° C.) to T1 are regions where there is no change in concentration regardless of heating and cooling and rapid cooling, and when the color is erased when the color is developed at the heating temperature T5 (about 200 ° C.) or higher, Discolored and cannot be completely erased. The specific temperatures indicated by the above numbers vary depending on the recording medium, and are examples of temperatures in an example recording medium.

このようなリライタブルカードなどへの発色および消色によるデータの記録および消去は、たとえば図１１に示されるようなリライタブルカードプリンタにより行われる。すなわち、図１１において、カードＲＣをカード挿入口５１に挿入して、搬送路５２を複数のローラ５２ａ、５２ｂ、５２ｃにより搬送して、印字ヘッド５３と消去ヘッド５４を通過して、所定の停止位置Ｐにおいて、待機すると共に、消去ヘッド５４のスイッチをオンにして通電加熱をはじめ、所定の消去温度に達したら、これを検知してカードＲＣを逆送させ、消去ヘッド５４と消去用プラテンローラ５４ａの間を通過させることにより消去を行う。消去されたカードはそのまま挿入口５１に戻せばカードＲＣの発色を消色することができる。このカードＲＣに新たな書込みをする場合、再度挿入口５１から挿入して今度は印字ヘッド５３と印字用プラテンローラ５３ａの間を通過させる際に印字ヘッド５３を動作させることにより新たな記録を行うことができる。消去と連続して記録を行うときは、消去後にカードＲＣの温度が図１０のＴ１の温度よりも下がってから行う（たとえば特許文献１参照）。   Recording and erasing of data by coloring and decoloring on such a rewritable card or the like is performed by a rewritable card printer as shown in FIG. 11, for example. That is, in FIG. 11, the card RC is inserted into the card insertion slot 51, the conveyance path 52 is conveyed by a plurality of rollers 52a, 52b, and 52c, passes through the print head 53 and the erasing head 54, and is stopped for a predetermined time. At the position P, while waiting, the energizing heating is started by turning on the switch of the erasing head 54, and when the predetermined erasing temperature is reached, this is detected and the card RC is fed back, and the erasing head 54 and the erasing platen roller Erasing is performed by passing between 54a. If the erased card is returned to the insertion slot 51 as it is, the color of the card RC can be erased. When a new writing is performed on the card RC, the new recording is performed by operating the print head 53 when the card RC is inserted again through the insertion slot 51 and then passed between the print head 53 and the printing platen roller 53a. be able to. When recording is performed continuously with erasure, the temperature of the card RC is lowered after the erasure after the temperature of T1 in FIG. 10 (see, for example, Patent Document 1).

このような装置に用いられる消去ヘッドは、たとえば図１２に平面図および側面図が示されるように、セラミック基板５５の表面に発熱体５６が通電できるように設けられ、その温度が消去温度に達しているか否かを検出するためのサーミスタ５７がセラミック基板５５の裏面側に設けられている。このセラミック基板５５などは、たとえばプラスティックなどからなるホルダー５８により保持されている（たとえば特許文献１参照）。このように、セラミック基板５６の裏面にサーミスタを設けて所定の温度に上昇したか否かを検出すると、セラミック基板が充分に温度上昇する必要があり、熱容量が大きくなるため、所定の温度に上昇するのに時間がかかり、消去を行おうとしてから、実際に消去を行うまでの時間が、たとえば１５秒程度以上と長くなる。   The erasing head used in such an apparatus is provided so that the heating element 56 can be energized on the surface of the ceramic substrate 55, for example, as shown in a plan view and a side view in FIG. A thermistor 57 for detecting whether or not the ceramic substrate 55 is present is provided on the back surface side of the ceramic substrate 55. The ceramic substrate 55 and the like are held by a holder 58 made of, for example, plastic (see, for example, Patent Document 1). As described above, when the thermistor is provided on the back surface of the ceramic substrate 56 to detect whether or not the temperature has risen to a predetermined temperature, the temperature of the ceramic substrate needs to be sufficiently increased, and the heat capacity increases, so that the temperature rises to the predetermined temperature. It takes a long time to complete the erasure, and the time from the actual erasure to the actual erasure becomes as long as about 15 seconds or more.

一方、本発明者は、発熱体に温度係数の大きいものを用い、その電流の変化により発熱体の温度を検出することを開示している（特許文献２参照）。実際に消去するカードは発熱体に接触させて行うため、その温度が上昇していればよく、発熱体の温度を直接検出することにより、基板裏面の温度が所定の温度に達しているか否かに関係なく消去することができ、早く応答することができる。
特開２００３−２１１７１０号公報（図１、図３） 特開２００３−３２０６９６号公報 On the other hand, the present inventor discloses that a heating element having a large temperature coefficient is used and the temperature of the heating element is detected by a change in the current (see Patent Document 2). Since the card to be actually erased is in contact with the heating element, it is sufficient that the temperature rises, and whether the temperature of the back surface of the board has reached a predetermined temperature by directly detecting the temperature of the heating element. It can be erased regardless of whether it can respond quickly.
JP 2003-217710 A (FIGS. 1 and 3) JP 2003-320696 A

前述のように、リライタブルカードの消去を行う場合などに、使用する度ごとに発熱体の通電をオンにすると、カードを挿入してから消去温度に達するまでに１５秒程度はかかり、非常に能率が悪いという問題がある。そのような問題をなくするため、前述の特許文献１に示されているように、使用しないときは予備加熱をしておいて、使用時に消去温度まで上昇させる方法や、消去ヘッドの加熱体に常に電流を流し続けてオン状態を維持することにより、使用時に直ちに消去作業を行うことができるようにする方法も用いられている。しかし、予備加熱をし続けたり、常に発熱体を正規温度に維持し続けたりすると、電力の消費が激しいと共に、消去ヘッドの温度が上昇して触れた場合の火傷や、火災などの安全管理上の問題や消去ヘッドの消耗が激しいという問題がある。   As described above, when erasing a rewritable card, if the heating element is turned on each time it is used, it takes about 15 seconds to reach the erasing temperature after the card is inserted. There is a problem that is bad. In order to eliminate such a problem, as shown in the above-mentioned Patent Document 1, preheating when not in use and raising the temperature to the erasing temperature at the time of use, A method is also used in which an erasing operation can be performed immediately at the time of use by continuously supplying a current and maintaining the on state. However, if preheating is continued or if the heating element is always maintained at a normal temperature, the power consumption is severe, and the temperature of the erase head rises to prevent burns when touched, and for safety management such as fire. And the problem that the erasing head is exhausted excessively.

一方、発熱体自体はスイッチをオンにすれば、２秒程度で温度上昇し、前述の発熱体の温度を直接測定してその温度を検出することにより、基板温度の上昇を待つ必要がないので、フィードバックが早く、少ない待ち時間で動作を始めることができる。しかし、このような方法で行う場合、長時間放置した後に消去作業を行う最初の１〜２枚で完全に消去されない場合が発生することがあり、長時間中止した後の作業の開始時に消去の不安定性が発生することを見出した。   On the other hand, if the heating element itself is turned on, the temperature rises in about 2 seconds, and it is not necessary to wait for the substrate temperature to rise by directly measuring the temperature of the heating element and detecting the temperature. The feedback is fast and the operation can be started with a small waiting time. However, when this method is used, there may be a case where the first one or two sheets that are erased after being left for a long time may not be completely erased. We found that instability occurs.

さらに、連続して消去作業を行う場合や、オーバーコートなどの熱転写を行う場合などは、連続動作をさせる必要があり、オーバーヒート（過熱）しないようにある程度温度を放熱する必要がある反面、前述のクイック動作という観点からはできるだけ熱容量を小さくする必要もある。   Furthermore, when performing erasing operations continuously or when performing thermal transfer such as overcoat, it is necessary to perform continuous operation, and while it is necessary to dissipate the temperature to some extent so as not to overheat (overheat), on the other hand, From the viewpoint of quick operation, it is also necessary to reduce the heat capacity as much as possible.

本発明の目的は、オンデマンド（随時加熱）動作をしながら、非常に待ち時間が少なく、かつ、完全に消去をすることができる記録媒体の記録消去装置および消去方法を提供することにある。 The purpose of the present invention, while the on-demand (optionally heated) operation, very low latency, and is to provide a recording and erasing apparatus and method of erasing a recording medium capable of completely erasing .

本発明のさらに他の目的は、動作中や待機中に拘わらず、発熱体の温度が所定の温度より一定温度以上高くなった場合には、発熱体への入力をオフにしたり極端に入力を落とすことにより、発熱体および消去ヘッドを保護すると共に、火災などの危険性を防止する安全手段が設けられた記録消去装置を提供することにある。   Still another object of the present invention is to turn off the input to the heating element or extremely input it when the temperature of the heating element becomes higher than a predetermined temperature by a certain temperature regardless of whether it is in operation or on standby. An object of the present invention is to provide a recording and erasing apparatus provided with safety means for protecting the heating element and the erasing head and preventing the risk of fire and the like by dropping.

本発明のさらに他の目的は、連続動作でヘッド基板の温度が上昇しても、加熱の過不足が生じないで記録媒体の記録消去を行うことができる記録媒体の記録消去装置および消去方法を提供することにある。   Still another object of the present invention is to provide a recording medium erasing apparatus and erasing method capable of erasing a recording medium without causing excessive or insufficient heating even if the temperature of the head substrate rises in continuous operation. It is to provide.

本発明者は、発熱用抵抗体の温度を検出して所定の温度に達したら記録媒体を搬送して記録の消去を行う場合に、消去作業の最初の１〜２枚で消去不充分のものが発生することがあり、その原因について鋭意検討を重ねて調べた結果、発熱用抵抗体の熱容量が小さいため、発熱用抵抗体の温度が上昇しても記録媒体と接触すると発熱用抵抗体の温度が急低下することにあり、ヘッド基板の全体でなくても、ヘッド基板表面の温度が所定の温度に達していれば発熱用抵抗体の温度の急低下を防ぐことができ、長時間放置後の最初の記録媒体から完全に消去することができることを見出した。そして、ヘッド基板と放熱板との間に熱抵抗層を挟むことによりヘッド基板からの熱の逃げを抑制して短時間でヘッド基板表面の温度が上昇し長時間連続動作をさせても、熱抵抗層を介して放熱板に放熱し、安定した温度を維持できることを見出した。   The present inventor detects the temperature of the heating resistor and, when the recording medium is conveyed and the recording is erased when the temperature reaches a predetermined temperature, the first 1-2 sheets of the erasing operation are insufficiently erased. As a result of intensive investigations on the cause, the heat capacity of the heating resistor is small, so even if the temperature of the heating resistor rises, if the heating resistor comes into contact with the recording medium, If the temperature of the surface of the head substrate reaches the specified temperature even if it is not the entire head substrate, the temperature of the heating resistor can be prevented from suddenly decreasing and left for a long time. It has been found that it can be completely erased from the first recording medium later. In addition, by sandwiching a thermal resistance layer between the head substrate and the heat sink, heat escape from the head substrate is suppressed, and the temperature of the head substrate surface rises in a short time. It has been found that heat can be radiated to the heat dissipation plate through the resistance layer and a stable temperature can be maintained.

すなわち、このヘッド基板のある程度の温度上昇は、ヘッド基板裏面まで所定の温度に上昇させる必要はなく、ヘッド基板表面での温度が所定の温度に達すれば、記録媒体を挿入しても発熱用抵抗体の温度が急低下することなく、充分に消去することができ、オンデマンドによる動作でも、待ち時間は２秒程度で消去をすることができることを見出した。   In other words, the temperature rise of the head substrate to a certain extent does not need to be increased to a predetermined temperature up to the back surface of the head substrate. If the temperature on the head substrate surface reaches the predetermined temperature, the heating resistor can be inserted even if a recording medium is inserted. It has been found that the body temperature can be sufficiently erased without a sudden drop in temperature, and the on-demand operation can be erased in about 2 seconds.

本発明による記録媒体の記録消去装置は、ヘッド基板の一面に設けられる帯状の発熱用抵抗体、前記ヘッド基板の一面に設けられる温度測定用抵抗体、および前記ヘッド基板の前記一面と対向する他面側で、該ヘッド基板よりも熱伝導率が小さい熱抵抗層を介して該ヘッド基板を保持する放熱板を有する加熱ヘッドと、前記温度測定用抵抗体と直列に、該温度測定用抵抗体よりも温度係数の小さい温度係数を有する第一の分圧抵抗が接続され、前記ヘッド基板の前記一面の温度を検出する測定用温度検出手段と、前記発熱用抵抗体と直列に、該発熱用抵抗体よりも温度係数の小さい温度係数を有する第二の分圧抵抗が接続され、該発熱用抵抗体の温度を検出する発熱用温度検出手段と、記録媒体を挿入口から前記発熱用抵抗体上を通過させて排出口へ搬送する搬送手段と、記録媒体が記録媒体待機場所にきたら前記発熱用抵抗体および温度測定用抵抗体への通電をオンにし、前記記録媒体が前記発熱用抵抗体上を通過し終るか、または前記記録媒体の搬送開始から一定時間後に前記通電をオフにする抵抗体制御手段と、前記測定用温度検出手段により前記ヘッド基板の一面の温度が第一の所定の温度に達し、かつ、前記発熱用温度検出手段により前記発熱用抵抗体の温度が第二の所定の温度に達したら、前記搬送手段を駆動して前記記録媒体の搬送を始め、前記記録媒体が排出されるか、搬送開始から一定時間の経過後に前記搬送手段を停止させる搬送制御手段とを有している。 A recording medium recording and erasing apparatus according to the present invention includes a belt-like heating resistor provided on one surface of a head substrate, a temperature measuring resistor provided on one surface of the head substrate, and the other facing the one surface of the head substrate. On the surface side, a heating head having a heat radiating plate for holding the head substrate via a thermal resistance layer having a lower thermal conductivity than the head substrate, and the temperature measuring resistor in series with the temperature measuring resistor A first voltage-dividing resistor having a temperature coefficient smaller than the temperature coefficient of the temperature measurement means for measuring the temperature of the one surface of the head substrate, and the heating resistor in series with the heating resistor. A second voltage dividing resistor having a temperature coefficient smaller than that of the resistor, and a heating temperature detecting means for detecting the temperature of the heating resistor; and the heating resistor from the insertion port of the recording medium Let the top pass When the conveying means for conveying to the outlet and the recording medium come to the recording medium standby place, the energization to the heating resistor and the temperature measuring resistor is turned on, and the recording medium has passed over the heating resistor. Or a resistor control unit that turns off the energization after a predetermined time from the start of conveyance of the recording medium, and the temperature of the one surface of the head substrate reaches a first predetermined temperature by the measurement temperature detection unit , and When the temperature of the heating resistor reaches a second predetermined temperature by the heating temperature detecting means , the conveying means is driven to start conveying the recording medium, and the recording medium is discharged or conveyed. And a conveyance control unit that stops the conveyance unit after a predetermined time has elapsed from the start.

なお、記録媒体待機場所とは、温度測定用抵抗体の温度が所定の温度に達すまで記録媒体を待機させる場所で、挿入口でそのまま待機させることもできるし、消去装置内の消去ヘッドに近い場所で待機させることもできるし、消去ヘッドと接触した状態で待機させることもできるが、いずれでも構わない。また、記録媒体待機場所にきたことの検出は、センサにより検出したり、挿入口でセンサにより検出してから一定時間後という時間設定で検知することができ、発熱抵抗体上を通過し終ったことや排出されたことの検出も、発熱抵抗体近傍や排出口にセンサを設けるか、搬送開始から一定時間後の時間設定により検出することができる。   The recording medium standby place is a place where the recording medium is made to wait until the temperature of the temperature measuring resistor reaches a predetermined temperature. The recording medium standby place can be made to wait as it is at the insertion port, or is close to the erasing head in the erasing apparatus. It is possible to wait at a place, or to wait in contact with the erasing head. In addition, the detection of having come to the recording medium standby place can be detected by a sensor or by a time setting of a predetermined time after being detected by the sensor at the insertion port, and has passed over the heating resistor. The detection of the fact that it has been discharged can also be detected by providing a sensor in the vicinity of the heating resistor or at the discharge port, or by setting the time after a certain time from the start of conveyance.

前記発熱用抵抗体の温度を検出する発熱用温度検出手段を有することにより、連続運転などにより発熱用抵抗体の温度が温度測定用抵抗体の温度と相対的に近くなっても、正確な温度で消去することができる。すなわち、動作初期で基板温度が低いときは発熱用抵抗体の温度が上昇してその温度がヘッド基板に伝わり温度測定用抵抗体に伝導するため、温度測定用抵抗体の温度が所定の温度に上昇すれば、発熱用抵抗体の温度も所定の温度（温度勾配があるため、発熱用抵抗体の所定温度が熱勾配分、温度測定用抵抗体の所定温度より高く設定されている）に達するが、連続動作によりヘッド基板の温度が所定温度に近づくと、発熱体用抵抗体の所定温度に到達する時間が遅くなる場合があり得る。しかし、発熱用抵抗体の温度も検出することにより、記録媒体のスタートを発熱用抵抗体の所定温度によっても管理することができる。 Wherein by have a heating temperature detecting means for detecting the temperature of the heat generating resistor, even if the temperature of the heat generating resistor due continuous operation becomes a temperature relatively close to the temperature measuring resistor, the exact Can be erased by temperature. That is, when the substrate temperature is low at the initial stage of operation, the temperature of the heating resistor rises and is transmitted to the head substrate and conducted to the temperature measuring resistor, so that the temperature of the temperature measuring resistor becomes a predetermined temperature. If the temperature rises, the temperature of the heating resistor also reaches a predetermined temperature (because there is a temperature gradient, the predetermined temperature of the heating resistor is set higher than the predetermined temperature of the temperature measuring resistor by the thermal gradient). However, when the temperature of the head substrate approaches a predetermined temperature by continuous operation, the time for reaching the predetermined temperature of the heating element resistor may be delayed. However, by detecting the temperature of the heating resistor, the start of the recording medium can be managed by the predetermined temperature of the heating resistor.

前記発熱用温度検出手段により検出される前記発熱用抵抗体の温度が前記第二の所定の温度より一定温度高くなり過ぎないように、前記発熱用抵抗体への入力を制御する入力制御手段が設けられることにより、使用状況に拘わらず、発熱用抵抗体の温度を非常に安定に維持することができる。 Input control means for controlling the input to the heating resistor so that the temperature of the heating resistor detected by the heating temperature detection means does not become a constant temperature higher than the second predetermined temperature; By being provided, the temperature of the heating resistor can be maintained very stably regardless of the usage situation.

前記発熱用温度検出手段により検出される前記発熱用抵抗体の温度が前記第二の所定の温度より予め設定される一定温度高い温度になった場合に前記発熱用抵抗体への入力をオフまたは低下させる安全手段が設けられていることにより、カードが挿入されない状態で空焚きをしたり、発熱抵抗体の抵抗値が不適当であったり、他の異常が発生したりした場合など、正常動作をしない場合でも、オーバーヒートによる消去ヘッドの破損や火災などの事故を防止することができ、安全対策上好ましい。 When the temperature of the heat generating resistor detected by the heat generating temperature detecting means is higher than the second predetermined temperature by a predetermined temperature, the input to the heat generating resistor is turned off or Providing safety measures to lower normal operation such as emptying when the card is not inserted, resistance value of the heating resistor is inappropriate, or other abnormalities occur Even if not, accidents such as breakage of the erasing head and fire due to overheating can be prevented, which is preferable in terms of safety measures.

本発明による記録媒体の記録消去方法は、ヘッド基板の一面に発熱用抵抗体を設け、該発熱用抵抗体の発熱により記録媒体の記録を消去する記録消去方法であって、前記ヘッド基板の一面に前記発熱用抵抗体とは別に前記ヘッド基板の一面の温度を測定する温度測定用抵抗体を設け、該温度測定用抵抗体と直列に該温度測定用抵抗体の温度係数より小さい温度係数を有する第一の分圧抵抗を設けて前記ヘッド基板の一面の温度を検出し、さらに前記発熱用抵抗体と直列に該発熱用抵抗体の温度係数より小さい温度係数を有する第二の分圧抵抗を接続して前記発熱用抵抗体の温度を検出し、前記ヘッド基板の一面の温度が第一の所定の温度に達し、かつ、前記発熱用抵抗体の温度が第二の所定の温度に達したら前記記録媒体を前記発熱用抵抗体上に送って前記記録媒体の記録を消去することを特徴とする。 Recording and erasing method of the recording medium according to the present invention, a heat generating resistor provided on one surface of the head substrate, a recording and erasing method for erasing recording in a recording medium by heating the heat generating resistor, one side of the head substrate In addition to the heating resistor, a temperature measuring resistor for measuring the temperature of one surface of the head substrate is provided, and a temperature coefficient smaller than the temperature coefficient of the temperature measuring resistor is provided in series with the temperature measuring resistor. A second voltage dividing resistor having a temperature coefficient smaller than the temperature coefficient of the heat generating resistor in series with the heat generating resistor; To detect the temperature of the heating resistor, the temperature of one surface of the head substrate reaches a first predetermined temperature , and the temperature of the heating resistor reaches a second predetermined temperature. When the recording medium is used as the heating resistor And wherein sending to erase the recording of the recording medium to the.

前記第一および第二の所定の温度を、消去速度、消去頻度、周囲温度または記録媒体の種類に応じて、前記記録媒体の消去可能温度範囲の中で加熱する温度を定めて設定することにより、消去の際の種々の条件が変っても確実に消去することができる。一般的には、記録媒体の消去温度範囲で中間部の温度で加熱するように設定することにより、少々温度が上下変動しても確実に消去することができるし、記録媒体の消去可能温度範囲のほぼ下限に近い温度で加熱し得る温度に設定することにより、連続動作や使用頻度の多い場合にはヘッド基板に蓄熱効果があるため、消費電力の抑制という観点から好ましい。すなわち、記録媒体の種類や使用目的などにより、適した温度に設定することができる。なお、温度測定用抵抗体（ヘッド基板表面）と発熱用抵抗体の温度とには温度差があるが、その温度差は通常使用ではほぼ一定であり、その温度差を考慮して温度測定用抵抗体の所定温度が設定される。 By determining and setting the first and second predetermined temperatures within the erasable temperature range of the recording medium according to the erasing speed, erasing frequency, ambient temperature or the type of the recording medium Even if various conditions at the time of erasure change, the erasure can be surely performed. Generally, by setting to heat at the intermediate temperature in the erasing temperature range of the recording medium, even if the temperature fluctuates up and down, it can be erased reliably, and the erasable temperature range of the recording medium By setting the temperature so that it can be heated at a temperature that is close to the lower limit, the head substrate has a heat storage effect in the case of continuous operation or frequent use, which is preferable from the viewpoint of suppressing power consumption. That is, the temperature can be set to an appropriate temperature depending on the type of recording medium and the purpose of use. Note that there is a temperature difference between the temperature measurement resistor (head substrate surface) and the temperature of the heating resistor, but the temperature difference is almost constant during normal use. A predetermined temperature of the resistor is set.

前記記録媒体が消去装置の記録媒体待機場所に挿入されたら前記発熱用抵抗体および温度測定用抵抗体の通電スイッチをオンにし、前記ヘッド基板の一面の温度が前記第一の所定の温度に達し、かつ、前記発熱用抵抗体の温度が前記第二の所定の温度に達したら前記記録媒体を移動させる搬送手段を駆動して該記録媒体を前記発熱用抵抗体上に送り、該記録媒体が前記発熱用抵抗体上を通過し終るか、または搬送開始から一定時間の経過後に前記発熱用抵抗体および温度測定用抵抗体への通電をオフにし、前記記録媒体が前記消去装置の排出口に排出されるか、搬送開始から一定時間の経過後に前記搬送手段の駆動を停止させることにより、電力の無駄がなく、非常に簡潔に、かつ、正確な消去作業をすることができる。 When the recording medium is inserted into the recording medium standby place of the erasing device, the energization switches of the heating resistor and the temperature measuring resistor are turned on, and the temperature of one surface of the head substrate reaches the first predetermined temperature. And, when the temperature of the heating resistor reaches the second predetermined temperature, the conveying means for moving the recording medium is driven to send the recording medium onto the heating resistor, After passing over the heating resistor, or after a certain time has elapsed from the start of conveyance, the energization of the heating resistor and the temperature measuring resistor is turned off, and the recording medium is placed in the discharge port of the erasing device By stopping the driving of the conveying means after being discharged or after a lapse of a certain time from the start of conveyance, there is no waste of power, and an erasing operation can be performed very simply and accurately.

前記発熱用抵抗体の温度を検出し、該発熱用抵抗体の温度が前記第二の所定の温度に到達し、かつ、前記温度測定用抵抗体の温度が前記第一の所定の温度に到達したときに前記搬送手段を駆動させることにより、連続動作などによりヘッド基板の温度と発熱用抵抗体の温度関係が大きく変化しても、消去漏れが生じたりすることなく、非常に正確に消去することができる。 The temperature of the heating resistor is detected, the temperature of the heating resistor reaches the second predetermined temperature, and the temperature of the temperature measuring resistor reaches the first predetermined temperature. By driving the transport means at this time, even if the temperature relationship between the temperature of the head substrate and the heating resistor changes greatly due to continuous operation or the like, erasing is performed very accurately without causing erasure leakage. be able to.

本発明の消去装置に用いられる加熱ヘッドによれば、ヘッド基板表面に発熱用抵抗体と温度測定用抵抗体とが設けられているため、発熱用抵抗体の温度のみならず、ヘッド基板表面の温度を検知することができる。すなわち、温度測定用抵抗体は、ヘッド基板表面に、たとえばペーストなどにより薄い膜で設けられているため、ヘッド基板表面の温度とほぼ等しくなり、温度測定用抵抗体自身で発熱しない程度の少ない電流を流すことにより、ヘッド基板表面の温度を検出することができる。その結果、発熱用抵抗体の温度も検出することができるため、発熱用抵抗体とヘッド基板表面の両方の温度を検出することができ、両者の関係により温度制御をすることができる。 According to the heating head used in the erasing apparatus of the present invention, since the heating resistor and the temperature measuring resistor are provided on the head substrate surface, not only the temperature of the heating resistor but also the temperature of the head substrate surface. Temperature can be detected. That is, since the temperature measuring resistor is provided on the head substrate surface with a thin film such as a paste, the current is almost equal to the temperature of the head substrate surface and the temperature measuring resistor itself does not generate heat. , The temperature of the head substrate surface can be detected. As a result, since the temperature of the heating resistor can also be detected, the temperatures of both the heating resistor and the head substrate surface can be detected, and the temperature can be controlled based on the relationship between the two.

さらに、本発明の消去装置に用いられる加熱ヘッドによれば、ヘッド基板と放熱板との間に熱抵抗層が設けられているため、ヘッド基板の温度をある程度小さい熱容量で早く温度を上げることができながら、長時間動作により温度が上昇する場合には、熱抵抗層を経て放熱板に熱が逃げ、長時間連続動作をしてもオーバーヒートすることがない。すなわち、短時間でヘッド基板表面の温度が所定の温度に到達しながら、長時間連続動作をしても、安定にその温度を維持することができる。なお、ヘッド基板、熱抵抗層、および放熱板の熱伝導率の関係は、たとえば放熱板が金属などの８０Ｗ／ｍ・Ｋ程度以上の熱伝導率のものが用いられ、熱抵抗層は０.３Ｗ／ｍ・Ｋ程度以下のものが用いられ、ヘッド基板はその中間の熱伝導率のものが用いられる。 Furthermore, according to the heating head used in the erasing apparatus of the present invention, since the thermal resistance layer is provided between the head substrate and the heat radiating plate, the temperature of the head substrate can be raised quickly with a small heat capacity. However, when the temperature rises due to long-time operation, heat escapes to the heat dissipation plate through the thermal resistance layer, and overheating does not occur even if continuous operation is performed for a long time. That is, even if the head substrate surface reaches a predetermined temperature in a short time and continues to operate for a long time, the temperature can be stably maintained. The thermal conductivity of the head substrate, the thermal resistance layer, and the heat radiating plate is, for example, a heat radiating plate having a thermal conductivity of about 80 W / m · K or more, such as a metal, and the thermal resistance layer is 0. A substrate having a thermal conductivity of about 3 W / m · K or less is used, and a head substrate having an intermediate thermal conductivity is used.

熱抵抗層は、加熱ヘッドの使用目的により、たとえば連続使用する場合には比較的大きい熱伝導率になるように設定され、殆ど間欠的に使用しながら短時間で動作させる場合には、熱伝導率の小さいものが選定される。熱抵抗を最も大きくする場合には、ヘッド基板の下に空隙を形成することもでき、空隙部も熱抵抗層に含まれる。また、たとえば消去ヘッドと印字ヘッドとを並べた配置するような場合、消去を終了して引き続き記録する場合には、できるだけ早く温度を下げることが好ましく、熱抵抗の小さいものが用いられる。   The thermal resistance layer is set to have a relatively high thermal conductivity depending on the purpose of use of the heating head, for example, when it is used continuously. One with a low rate is selected. When the thermal resistance is maximized, a gap can be formed under the head substrate, and the gap is also included in the thermal resistance layer. For example, in the case where the erasing head and the print head are arranged side by side, when erasing is finished and recording is continued, it is preferable to lower the temperature as soon as possible, and one having a low thermal resistance is used.

本発明の記録媒体の記録消去方法および装置によれば、ヘッド基板表面に設けられる温度測定用抵抗体の温度、すなわちヘッド基板表面の温度を検出して所定の温度に達してから、記録媒体を消去ヘッドと接触させているため、発熱用抵抗体と記録媒体とが接触しても、発熱用抵抗体のみならずヘッド基板表面によっても温度が維持されることになり、すなわち熱容量が大きくなり、発熱用抵抗体の温度が急激に低下することなく、完全な消去をすることができる。しかも、ヘッド基板裏面の温度を検出する場合のように、ヘッド基板全体の温度が所定温度に達するまで待つ訳ではないので、非常に短時間で消去作業を始めることができる。その結果、普段は抵抗体の通電をオフにしておき、消去作業をする場合のみに、抵抗体の通電をオンにして作業をすることにより、無駄な電力の損失や消去ヘッドの消耗、劣化を防止し、安全管理を確実にしながら、オンにしてから短時間で作業をすることができ、オンデマンドの動作を非常に効率的に行うことができる。   According to the recording and erasing method and apparatus of the recording medium of the present invention, the temperature of the temperature measuring resistor provided on the head substrate surface, that is, the temperature of the head substrate surface is detected and reaches a predetermined temperature. Since it is in contact with the erasing head, even if the heating resistor and the recording medium are in contact, the temperature is maintained not only by the heating resistor but also by the head substrate surface, that is, the heat capacity is increased, Complete erasing can be performed without the temperature of the heating resistor rapidly decreasing. In addition, since the temperature of the entire head substrate does not wait until the temperature of the entire head substrate reaches a predetermined temperature as in the case of detecting the temperature of the back surface of the head substrate, the erasing operation can be started in a very short time. As a result, it is usually necessary to turn off the resistor and turn on the resistor only when the eraser is turned on. It is possible to work in a short time after being turned on while preventing and ensuring safety management, and on-demand operation can be performed very efficiently.

さらに、ヘッド基板の表面温度を検出して消去作業を始めているため、雰囲気温度が低くても高くても非常に正確に消去作業をすることができる。また、消去速度、消去頻度、周囲温度条件、記録媒体の種類などにより発熱用抵抗体の温度とヘッド基板表面の温度との関係が変る場合には、搬送開始の所定温度を変えることにより、正確な温度設定に修正することができる。   Further, since the erasing operation is started by detecting the surface temperature of the head substrate, the erasing operation can be performed very accurately regardless of whether the ambient temperature is low or high. In addition, if the relationship between the temperature of the heating resistor and the temperature of the head substrate surface changes depending on the erasing speed, erasing frequency, ambient temperature conditions, type of recording medium, etc. It can be corrected to a proper temperature setting.

つぎに、図面を参照しながら本発明の記録消去装置および消去方法に用いられる加熱ヘッド、記録媒体の記録消去装置およびその消去方法について説明をする。本発明の記録消去装置に用いられる加熱ヘッドは、その一実施形態の平面説明図および側面説明図（（ａ）のＢ視およびＣ視）が図１に示されるように、平面形状がほぼ長方形状のヘッド基板１の一面（表面）に、ヘッド基板１の長手方向に沿って、発熱用抵抗体２が少なくとも１本形成され、さらにヘッド基板１の表面に温度測定用抵抗体３が設けられている。このヘッド基板１の一面と対向する他面（裏面）側に、ヘッド基板１を保持する放熱板５が設けられ、その放熱板５とヘッド基板１との間に熱抵抗層４が設けられている。 Next, a heating head, a recording medium recording and erasing apparatus, and an erasing method for the recording head which are used in the recording and erasing apparatus and erasing method of the present invention will be described with reference to the drawings. Heating head that is used in the recording and erasing apparatus of the present invention, as a plan explanatory view and a side view of one embodiment thereof ((B vision and C as viewed in a)) is shown in Figure 1, substantially planar shape At least one heating resistor 2 is formed on one surface (front surface) of the rectangular head substrate 1 along the longitudinal direction of the head substrate 1, and a temperature measurement resistor 3 is provided on the surface of the head substrate 1. It has been. A heat radiating plate 5 for holding the head substrate 1 is provided on the other surface (back surface) facing the one surface of the head substrate 1, and a heat resistance layer 4 is provided between the heat radiating plate 5 and the head substrate 1. Yes.

ヘッド基板１は、たとえば長さ約５０ｍｍ、幅約５ｍｍ、厚さ約０.６ｍｍの略矩形状板からなり、その材質としてはある程度熱伝導性のあるもの、すなわち熱伝導率が０.５〜３０Ｗ／Ｋ・ｍ程度のもので、使用時の発熱温度条件において耐熱性を有し、発熱抵抗体を設ける面が絶縁性を有するもの、たとえばアルミナ（熱伝導率：２１Ｗ／Ｋ・ｍ）などのセラミックス、石英ガラス（熱伝導率：１.４Ｗ／Ｋ・ｍ）、ガラス（熱伝導率：０.８Ｗ／Ｋ・ｍ）などを用いることができる。これは熱伝導率が低過ぎると連続動作をした場合に過熱（オーバーヒート）する危険性があり、熱伝導率が大きすぎると発熱抵抗体の熱量が逃げやすいからである。この観点から、樹脂系材料、表面に絶縁膜が設けられたステンレスなどからなる金属板、ガラス系材料なども使用することができる。なお、本実施形態では、ヘッド基板１として、アルミナ基板を用い、その上面には図示しないがガラス層（熱伝導率：０.８Ｗ／Ｋ・ｍ）が０.０８ｍｍ程度の厚さに設けられている。   The head substrate 1 is made of a substantially rectangular plate having a length of about 50 mm, a width of about 5 mm, and a thickness of about 0.6 mm, for example, and has a certain degree of thermal conductivity, that is, a thermal conductivity of 0.5 to 0.5. It is about 30 W / K · m, has heat resistance under the heat generation temperature conditions during use, and has an insulating surface on which the heating resistor is provided, for example, alumina (thermal conductivity: 21 W / K · m), etc. Ceramics, quartz glass (thermal conductivity: 1.4 W / K · m), glass (thermal conductivity: 0.8 W / K · m), and the like can be used. This is because if the thermal conductivity is too low, there is a risk of overheating (overheating) in the case of continuous operation, and if the thermal conductivity is too high, the heat quantity of the heating resistor is likely to escape. From this viewpoint, a resin material, a metal plate made of stainless steel having an insulating film on the surface, a glass material, or the like can also be used. In the present embodiment, an alumina substrate is used as the head substrate 1, and a glass layer (thermal conductivity: 0.8 W / K · m) is provided on the upper surface thereof to a thickness of about 0.08 mm although not shown. ing.

発熱用抵抗体２は、たとえばＡｇ＋Ｐｄ＋ガラスなどの固形絶縁粉末をペースト状にして塗布して、焼成することにより形成されている。これにさらにＲｕＯ2などを加えたものを使用することもできる。焼成により形成されるＡｇ-Ｐｄ合金からなる場合、シート抵抗として１００ｍΩ／Ｓｑ〜２００ｍΩ／Ｓｑが得られ（固形絶縁粉末の量によっても異なる）、両者の比率により抵抗値や温度係数を変えることができる。また、導体（電極）として使用する場合、Ａｇが多い程抵抗を低くすることができる。大きさは、たとえば幅約２ｍｍ、厚さ約１０μｍの直線状で、ヘッド基板１の長手方向の長さ方向における両端部に設けられる一対の電極２ａ、２ｂに重なるように印刷形成され、その長さは約４５ｍｍで、抵抗値が約８Ω、抵抗温度係数を約１５００ｐｐｍ／℃（温度が１００℃変化すると抵抗値が１５％変化する）に形成されている。しかし、発熱用抵抗体２の発熱特性は、これに限定されず、自由に設定することができるが、発熱用抵抗体２の抵抗温度係数は正に高い方が好ましく、とくに１０００〜３５００ｐｐｍ／℃の材料を用いることが、後述する発熱用抵抗体２の温度を検出して制御するのに好ましい。 The heating resistor 2 is formed by applying a solid insulating powder such as Ag + Pd + glass in the form of a paste and baking it. It is also possible to use a further added and RuO 2 thereto. When made of an Ag—Pd alloy formed by firing, a sheet resistance of 100 mΩ / Sq to 200 mΩ / Sq is obtained (depending on the amount of solid insulating powder), and the resistance value and temperature coefficient can be changed depending on the ratio of the two. it can. Moreover, when using as a conductor (electrode), resistance can be made low, so that there is much Ag. The size is, for example, a linear shape having a width of about 2 mm and a thickness of about 10 μm, and is printed and formed so as to overlap a pair of electrodes 2 a and 2 b provided at both ends in the longitudinal direction of the head substrate 1. The thickness is about 45 mm, the resistance value is about 8Ω, and the temperature coefficient of resistance is about 1500 ppm / ° C. (the resistance value changes by 15% when the temperature changes by 100 ° C.). However, the heat generation characteristic of the heat generating resistor 2 is not limited to this, and can be freely set. However, it is preferable that the temperature coefficient of resistance of the heat generating resistor 2 is positively higher, particularly 1000 to 3500 ppm / ° C. It is preferable to use this material in order to detect and control the temperature of the heating resistor 2 described later.

抵抗温度係数が正に高いということは、温度が上昇すると抵抗値の増加が大きいことであるから、発熱させた状態における抵抗値測定により基準抵抗値からのずれにより実際の発熱温度の検出を容易に精度よく行え、印加電圧を調整し、または印加パルスのデューティを調整することにより所望の発熱温度からのずれを修正しやすくなる。また、抵抗温度係数が正であることにより、温度が上昇し過ぎた場合に抵抗値が増大して電流値が下がり、抵抗による発熱量が下がるため、より早く温度が飽和状態となり、高温時の温度安定性に優れているからであり、熱暴走などによる過熱を防止できるからである。なお、発熱用抵抗体２の幅も前述の例に限定されず、用途に応じて設定され、複数本並列に並べてもよい。   The fact that the temperature coefficient of resistance is positively high means that the resistance value increases greatly as the temperature rises, so it is easy to detect the actual heat generation temperature due to deviation from the reference resistance value by measuring the resistance value in the heated state. It is easy to correct the deviation from the desired heat generation temperature by adjusting the applied voltage or adjusting the duty of the applied pulse. Also, since the temperature coefficient of resistance is positive, if the temperature rises too much, the resistance value increases, the current value decreases, and the amount of heat generated by the resistance decreases, so the temperature becomes saturated sooner, This is because it is excellent in temperature stability and can prevent overheating due to thermal runaway. In addition, the width of the heating resistor 2 is not limited to the above example, and may be set according to the application and may be arranged in parallel.

また、発熱用抵抗体２の両端部には、たとえばパラジウムの比率を小さくした銀・パラジウム合金やＡｇ-Ｐｔ合金などの良導電体からなる電極２ａ、２ｂが印刷形成されている。この電極２ａ、２ｂは、熱抵抗層４上の中継導電部２ｃ、２ｄを経て後述する配線基板６の電極端子２ｇ、２ｈに接続配線２ｅ、２ｆを介して接続され、さらに配線基板６内の配線を経て配線基板６上の外部接続端子２ｉ、２ｊに接続されている。この外部端子２ｉ、２ｊに電源が接続されて発熱用抵抗体２に通電される。   Further, on both ends of the heating resistor 2, electrodes 2a and 2b made of a good conductor such as a silver / palladium alloy or an Ag—Pt alloy with a reduced palladium ratio are formed by printing. The electrodes 2a and 2b are connected to electrode terminals 2g and 2h of a wiring board 6 to be described later via relay conductive portions 2c and 2d on the thermal resistance layer 4 via connection wirings 2e and 2f. The wiring is connected to external connection terminals 2i and 2j on the wiring board 6 through wiring. A power source is connected to the external terminals 2i and 2j, and the heating resistor 2 is energized.

温度測定用抵抗体３は、発熱用抵抗体２と同じ材料で形成されてもよいが、好ましくはできるだけ温度係数の絶対値（％）が大きい方が好ましい。この温度測定用抵抗体３は、発熱させるものではなく、ヘッド基板１の温度を検出するもので、たとえば０.５ｍｍ幅、３３ｍｍ程度の長さで、１２Ω程度に形成され、抵抗体３自身は発熱しないよう印加電圧が低く抑えられて５Ｖ程度が印加される。すなわち、この温度測定用抵抗体３はヘッド基板１上に薄い層で設けられているため、両者の温度は殆ど同じで、温度測定用抵抗体３の温度を測定することにより、ヘッド基板１表面の温度を推測することができる。温度検出手段については後述するが、この温度測定用抵抗体３の両端の電圧変化を検出することにより温度測定用抵抗体３の温度を検出するため、温度係数が大きい方が測定誤差を小さくすることができる。なお、この場合は、温度係数は正でも負でもよい。   The temperature measuring resistor 3 may be formed of the same material as the heat generating resistor 2, but it is preferable that the absolute value (%) of the temperature coefficient is as large as possible. This temperature measuring resistor 3 does not generate heat but detects the temperature of the head substrate 1 and is formed to have a width of about 0.5 mm and a length of about 33 mm, for example, about 12Ω. The applied voltage is kept low so as not to generate heat, and about 5 V is applied. That is, since the temperature measuring resistor 3 is provided in a thin layer on the head substrate 1, both temperatures are almost the same. By measuring the temperature of the temperature measuring resistor 3, the surface of the head substrate 1 is measured. Can be estimated. Although the temperature detecting means will be described later, the temperature of the temperature measuring resistor 3 is detected by detecting the voltage change at both ends of the temperature measuring resistor 3, so that the larger the temperature coefficient, the smaller the measurement error. be able to. In this case, the temperature coefficient may be positive or negative.

温度測定用抵抗体３は、発熱用抵抗体２と同じ材料であれば、印刷などにより形成する場合、発熱用抵抗体２と同時に形成することができるため製造上の観点からは好ましい。しかし、測定温度の精度を必要とする場合には、ＡｇとＰｄの混合比率を変えたものや、全く別の材料で温度係数の大きいものを用いることもできる。   If the temperature measuring resistor 3 is made of the same material as the heat generating resistor 2, it can be formed simultaneously with the heat generating resistor 2 when formed by printing or the like, which is preferable from the viewpoint of manufacturing. However, when the accuracy of the measurement temperature is required, it is possible to change the mixing ratio of Ag and Pd or use a completely different material having a large temperature coefficient.

なお、図示されていないが、発熱用抵抗体２や温度測定用抵抗体３の上には、磨耗および異物付着によるショートの防止として、たとえばガラスなどからなる保護層を設けてもよい。本実施形態では、図示しないがガラス層（熱伝導率：１Ｗ／Ｋ・ｍ）が０.０１ｍｍ厚程度設けられている。   Although not shown, a protective layer made of, for example, glass may be provided on the heating resistor 2 and the temperature measuring resistor 3 to prevent short circuit due to wear and foreign matter adhesion. In the present embodiment, although not shown, a glass layer (thermal conductivity: 1 W / K · m) is provided with a thickness of about 0.01 mm.

ヘッド基板１の裏面側には、熱抵抗層４を介して放熱板５が設けられている。熱抵抗層４は、ヘッド基板１よりも熱伝導率の低い層を設けることにより、発熱用抵抗体２で発生する熱を余り逃がさないようにして、発熱用抵抗体２に通電してから直ちに消去温度に上がりやすいようにしてある。すなわち、前述のように、ヘッド基板１の温度が低過ぎると、たとえ発熱用抵抗体２の温度が所定の温度に達していても、完全には消去できない場合が生じるため、本発明者が鋭意検討を重ねた結果、この熱抵抗層４を設け、その熱伝導を制御することにより、発熱用抵抗体２の温度とヘッド基板１表面の温度を所定の温度関係に維持できることを見出した。この熱抵抗層４は、ヘッド基板１より熱伝導率の小さいもの、すなわち０.３Ｗ／ｍ・Ｋ程度以下の熱伝導率のものが用いられ、たとえば０.５ｍｍ厚のガラスエポキシ樹脂（熱伝導率０.２Ｗ／ｍ・Ｋ）板で形成することができる。この熱抵抗層４は、ヘッド基板１の熱伝導率などにも影響されるが、前述のように、発熱用抵抗体２の温度とヘッド基板１表面の温度ができるだけ短い時間で一定の温度関係になり、かつ、抵抗体の通電がオフにされたら、できるだけ速やかに冷却されるような材料および厚さで形成される。   On the back side of the head substrate 1, a heat radiating plate 5 is provided via a thermal resistance layer 4. The thermal resistance layer 4 is provided with a layer having a lower thermal conductivity than that of the head substrate 1 so that the heat generated in the heating resistor 2 is not released so much as soon as the heating resistor 2 is energized. It is easy to increase the erasing temperature. That is, as described above, if the temperature of the head substrate 1 is too low, even if the temperature of the heating resistor 2 has reached a predetermined temperature, it may not be completely erased. As a result of repeated studies, it was found that the temperature of the heating resistor 2 and the temperature of the surface of the head substrate 1 can be maintained in a predetermined temperature relationship by providing the thermal resistance layer 4 and controlling the heat conduction. This thermal resistance layer 4 has a thermal conductivity smaller than that of the head substrate 1, that is, a thermal conductivity of about 0.3 W / m · K or less. For example, a 0.5 mm thick glass epoxy resin (thermal conductivity) is used. (Rate 0.2 W / m · K) plate. Although the thermal resistance layer 4 is influenced by the thermal conductivity of the head substrate 1 and the like, as described above, the temperature relationship between the temperature of the heating resistor 2 and the temperature of the head substrate 1 surface is constant in as short a time as possible. And when the energization of the resistor is turned off, the material and the thickness are formed so as to be cooled as quickly as possible.

放熱板５は、たとえばアルミニウム板（熱伝導率：２２１Ｗ／ｍ・Ｋ）、鉄板（熱伝導率：８３Ｗ／ｍ・Ｋ）などの熱伝導率の大きい材料が用いられる。しかし、このヘッド基板１の材料は、アルミニウムのような金属板には限らず、ヘッド基板１をしっかりと保持しながら、連続して使用されても、発熱用抵抗体２の温度が上昇し過ぎないで、常に安定した温度を維持させ得るものであればよい。この観点から、放熱板５は熱伝導率が８０Ｗ／ｍ・Ｋ程度以上のものが好ましい。前述のヘッド基板１に対応する放熱板５は、たとえば長さが５０ｍｍ程度で、幅が７ｍｍ程度、厚さが７ｍｍ程度に形成されている。   The heat radiating plate 5 is made of a material having a high thermal conductivity such as an aluminum plate (thermal conductivity: 221 W / m · K) or an iron plate (thermal conductivity: 83 W / m · K). However, the material of the head substrate 1 is not limited to a metal plate such as aluminum. Even if the head substrate 1 is continuously used while firmly holding the head substrate 1, the temperature of the heating resistor 2 increases excessively. However, it may be anything that can always maintain a stable temperature. From this viewpoint, the heat sink 5 preferably has a thermal conductivity of about 80 W / m · K or more. The heat radiating plate 5 corresponding to the head substrate 1 is formed, for example, to have a length of about 50 mm, a width of about 7 mm, and a thickness of about 7 mm.

放熱板５の側面には、図１（ｂ）および（ｃ）に示されるように、プリント基板などからなる配線基板６が設けられており、回路配線上に樹脂コートにより絶縁膜が設けられているが、発熱用抵抗体２用の電極端子２ｇ、２ｈ、さらに配線基板６内の配線を経て配線基板６上の外部端子２ｉ、２ｊの部分は露出され、前述のように、発熱用抵抗体２の電極２ａ、２ｂと外部接続端子２ｉ、２ｊとが接続され、図示しない外部電源が接続されることにより発熱用抵抗体２に通電されるようになっている。温度測定用抵抗体３用も同様に、電極端子３ｇ、３ｈ、さらに配線基板６内の配線を経て配線基板６上の外部端子３ｉ、３ｊの部分は露出され、温度測定用抵抗体３の電極３ａ、３ｂと接続して設けられる熱抵抗層４上の中継導電部３ｃ、３ｄと電極端子３ｇ、３ｈとが接続配線３ｅ、３ｆで接続されている。そして、外部端子３ｉ、３ｊに図示しない外部電源が接続されて温度測定用抵抗体３に通電されるようになっている。なお、６ａはサーミスタ端子で、過熱防止二重安全用にヘッド基板裏面にサーミスタが設けられる場合に用いられる。   As shown in FIGS. 1B and 1C, a wiring board 6 made of a printed board or the like is provided on the side surface of the heat sink 5, and an insulating film is provided on the circuit wiring by a resin coat. However, the electrode terminals 2g and 2h for the heating resistor 2 and the portions of the external terminals 2i and 2j on the wiring board 6 are exposed through the wiring in the wiring board 6, and as described above, the heating resistor The two electrodes 2a, 2b and the external connection terminals 2i, 2j are connected, and the heating resistor 2 is energized by connecting an external power source (not shown). Similarly, for the temperature measuring resistor 3, the electrode terminals 3g and 3h and the portions of the external terminals 3i and 3j on the wiring board 6 are exposed through the wiring in the wiring board 6, and the electrodes of the temperature measuring resistor 3 are exposed. The relay conductive portions 3c, 3d on the thermal resistance layer 4 provided in connection with 3a, 3b and the electrode terminals 3g, 3h are connected by connection wirings 3e, 3f. An external power source (not shown) is connected to the external terminals 3i and 3j so that the temperature measuring resistor 3 is energized. Reference numeral 6a denotes a thermistor terminal, which is used when a thermistor is provided on the back surface of the head substrate for double overheating prevention.

この加熱ヘッドを消去ヘッドとして用いて、たとえば記録媒体の記録を消去するには、図２に一例の一部拡大説明図が示されるように、消去ヘッド１０の発熱用抵抗体２を所定の温度に上昇させ、発熱用抵抗体２側とプラテンローラ１０ａとを圧接するように対向させて、プラテンローラ１０ａを回転させながらその間に記録媒体である、たとえばリライタブルなカードＲＣを通過させることにより、カードＲＣの画像記録部の温度が上昇して消色し、記録を消去することができる。   For example, in order to erase the recording on the recording medium using this heating head as an erasing head, the heating resistor 2 of the erasing head 10 is set to a predetermined temperature as shown in FIG. By causing the heating resistor 2 side and the platen roller 10a to face each other so as to come into pressure contact with each other, and rotating the platen roller 10a, a recording medium, for example, a rewritable card RC is passed therethrough. The temperature of the RC image recording part rises and the color disappears, and the recording can be erased.

本発明の記録消去装置に用いられる加熱ヘッドによれば、発熱用抵抗体２および温度測定用抵抗体３が設けられるヘッド基板１にある程度の熱伝導率の材料を用い、その裏側にヘッド基板よりも熱伝導率が１／１００程度に落ちる熱抵抗層４を介して熱伝導率がヘッド基板の１０倍程度の非常に良好な放熱板が設けられる構造になっているため、発熱用抵抗体２およびヘッド基板１表面の温度が抵抗体への通電開始後速やかに温度上昇し、所定の温度に上昇させることができる。しかも、熱抵抗層を介して非常に熱伝導の良好な放熱板が設けられているため、連続使用により温度が上昇しても、連続使用による長時間の経過では、熱抵抗層を経ても熱伝導はある程度行われ、薄い熱抵抗層を通過して放熱板により放熱される。その結果、短時間で所定の温度に上昇し、連続動作をしても過熱することがなく、どのような使用条件においても非常に安定した温度の加熱ヘッドが得られ、間欠的に行う記録媒体の記録消去装置や、アンダーコート、オーバーコートなどの熱転写装置などの加熱ヘッドとして利用することができる。 According to the heating head used in the recording and erasing apparatus of the present invention, a material having a certain degree of thermal conductivity is used for the head substrate 1 on which the heating resistor 2 and the temperature measuring resistor 3 are provided. However, the heat generating resistor 2 has a structure in which a very good heat radiating plate having a thermal conductivity of about 10 times that of the head substrate is provided through the thermal resistance layer 4 whose thermal conductivity drops to about 1/100. In addition, the temperature of the surface of the head substrate 1 can be quickly increased after energization of the resistor is started, and can be increased to a predetermined temperature. In addition, since a heat dissipation plate with very good heat conduction is provided through the heat resistance layer, even if the temperature rises due to continuous use, even if it passes through the heat resistance layer for a long time due to continuous use, Conduction is performed to some extent, and the heat is dissipated by the heat sink through the thin heat resistance layer. As a result, the temperature rises to a predetermined temperature in a short time and does not overheat even during continuous operation, and a heating head having a very stable temperature can be obtained under any use condition, and the recording medium is intermittently performed. It can be used as a heating head for a recording / erasing apparatus, a thermal transfer apparatus such as an undercoat or overcoat.

つぎに、本発明による記録媒体の記録を消去する消去装置およびその消去方法について説明をする。本発明による記録媒体の記録消去方法は、図３に一例の装置の概略ブロック図が示されるように、図１に示される構造の消去ヘッド１０を用い、温度測定用抵抗体の温度、すなわちヘッド基板表面の温度を検出し、その温度が所定の温度に達したら可逆性記録媒体であるカードＲＣを発熱用抵抗体上に送って記録媒体の記録を消去することを特徴としている。   Next, an erasing apparatus and erasing method for erasing the recording on the recording medium according to the present invention will be described. The recording / erasing method of the recording medium according to the present invention uses the erasing head 10 having the structure shown in FIG. 1, as shown in a schematic block diagram of an example apparatus in FIG. The temperature of the substrate surface is detected, and when the temperature reaches a predetermined temperature, the card RC which is a reversible recording medium is sent onto the heating resistor to erase the recording on the recording medium.

さらに具体的には、図４にフローチャートが示されるように、カードＲＣがカード待機場所、たとえば消去装置の挿入口１２に挿入されたら抵抗体制御手段１５を駆動して発熱用抵抗体および温度測定用抵抗体の通電スイッチ（たとえば２４Ｖ）をオンにし、測定用温度検出手段１６により温度測定用抵抗体が所定の温度（たとえば１３０℃）に達したら、搬送制御手段１８により搬送手段１３（１３ａ、１３ｂ、１３ｃ）を駆動してカードＲＣを移動させる。そして、カードＲＣを消去ヘッド１０上に送り、カードＲＣが消去ヘッド１０上を通過し終ったら発熱用抵抗体および温度測定用抵抗体への通電をオフにする。そして、カードＲＣが消去装置の排出口１４に排出されたら、図示しない検知センサにより、または搬送開始からの時間制御により検知して搬送制御手段１８により搬送手段１３の駆動を停止する。この抵抗体制御手段１５と搬送制御手段１８のオンオフのタイミングは図６に示されるようになる。図６では、２枚のカードを連続的に行った場合の例が示されている。   More specifically, as shown in the flowchart in FIG. 4, when the card RC is inserted into the card standby place, for example, the insertion port 12 of the erasing device, the resistor control means 15 is driven to generate the heating resistor and the temperature measurement. When the energizing switch of the resistor is turned on (for example, 24V) and the temperature measuring resistor reaches a predetermined temperature (for example, 130 ° C.) by the measuring temperature detecting means 16, the conveying control means 18 causes the conveying means 13 (13a, 13b, 13c) is driven to move the card RC. Then, the card RC is sent onto the erasing head 10, and when the card RC has passed over the erasing head 10, the energization of the heating resistor and the temperature measuring resistor is turned off. Then, when the card RC is discharged to the discharge port 14 of the erasing apparatus, detection is performed by a detection sensor (not shown) or by time control from the start of transfer, and the drive of the transfer unit 13 is stopped by the transfer control unit 18. The on / off timing of the resistor control means 15 and the conveyance control means 18 is as shown in FIG. FIG. 6 shows an example in which two cards are continuously performed.

この搬送手段１３の搬送速度は、目的により種々の早さに設定することができ、たとえば３０ｍｍ／秒程度で搬送することができるが、これより早い場合も遅い場合もある。また、搬送手段の制御は、カードの位置による制御でなくても、一定時間で制御することもできる。すなわち、この搬送速度を認識しておけば、たとえば測定用温度検出手段１６からの搬送手段駆動信号による駆動開始から２.５秒後（７５ｍｍ移動）に抵抗体への通電をオフにし、３秒後（９０ｍｍ移動）に搬送手段を停止する、などの時間制御により搬送手段を駆動することもできる。この時間は一例で、装置の大きさ、カード待機場所などにより、時間を設定することができる。   The conveying speed of the conveying means 13 can be set at various speeds depending on the purpose. For example, the conveying means 13 can convey at about 30 mm / second, but it may be faster or slower. Further, the control of the transport means can be controlled in a certain time, not by the control of the card position. In other words, if this transport speed is recognized, for example, the energization to the resistor is turned off 2.5 seconds after the start of the drive by the transport means drive signal from the measurement temperature detecting means 16 (75 mm movement). The conveying means can also be driven by time control such as stopping the conveying means later (90 mm movement). This time is an example, and the time can be set according to the size of the apparatus, the card standby place, and the like.

図４に示される例は、カードの待機場所がカード挿入口の例であったが、カード待機場所は、たとえば消去ヘッドの近くとか、消去ヘッドに接触する位置など、消去装置内の種々の場所に設定することができる。この場合には、カード挿入口にカードが挿入されたら、自動的に、または手動的にカードをカード待機場所に送ってから、前述の抵抗体への通電が制御される。その一例のフローチャートが図５に示されている。すなわち、たとえばカードがカード挿入口に挿入されたら、それを検知して搬送手段１３を駆動し、カード待機場所まで搬送する。そして、カード待機場所でカードの到着をセンサにより、または時間制御により検知したら、搬送手段を停止させると共に、抵抗体制御手段により発熱用抵抗体および温度測定用抵抗体に通電を開始する。その後の動作は、前述の図４に示されるフローと同じである。   The example shown in FIG. 4 is an example in which the card standby location is the card insertion slot, but the card standby location may be various locations in the erasing device such as near the erasing head or a position where it contacts the erasing head. Can be set to In this case, when the card is inserted into the card insertion slot, the card is automatically or manually sent to the card standby place, and then the energization to the resistor is controlled. An example flowchart is shown in FIG. That is, for example, when a card is inserted into the card insertion slot, it is detected and the transport means 13 is driven and transported to a card standby place. When the arrival of the card is detected by a sensor or by time control at the card standby place, the conveying means is stopped, and energization of the heating resistor and the temperature measuring resistor is started by the resistor control means. The subsequent operation is the same as the flow shown in FIG.

図３に示される概略ブロック図は、図４に示される一連の工程を行うように構成されている。すなわち、挿入口１２は、カードＲＣを挿入し得るように形成されてカード待機場所になると共に、カードＲＣの挿入を検出する図示しない検知センサが設けられている。そして、検知センサにより得られるカード挿入の信号は抵抗体制御手段１５に送られるようになっている。また、挿入されたカードＲＣは、たとえばローラ１３ａ、１３ｂ、１３ｃによりカードＲＣをくわえながら搬送する搬送手段１３により消去ヘッド１０を経て排出口１４に送られるようになっている。この搬送用のローラ１３ａ、１３ｂ、１３ｃの回転は、搬送制御手段１８により制御され、所定の場合に回転してカードＲＣが搬送されるようになっている。なお、図３に示される例では、挿入口１２と排出口１４とが別の位置に形成されているが、途中でカードＲＣの進行を逆転させて、挿入口１２と排出口１４とを共通化することもできる。また、前述のように、カード待機場所を挿入口１２とは別に設定することもできる。   The schematic block diagram shown in FIG. 3 is configured to perform a series of steps shown in FIG. That is, the insertion slot 12 is formed so that the card RC can be inserted and becomes a card standby place, and a detection sensor (not shown) that detects insertion of the card RC is provided. The card insertion signal obtained by the detection sensor is sent to the resistor control means 15. The inserted card RC is sent to the discharge port 14 via the erasing head 10 by the conveying means 13 that conveys the card RC while holding the card RC with rollers 13a, 13b, and 13c, for example. The rotation of the transport rollers 13a, 13b, 13c is controlled by the transport control means 18, and rotates in a predetermined case so that the card RC is transported. In the example shown in FIG. 3, the insertion port 12 and the discharge port 14 are formed at different positions. However, the insertion port 12 and the discharge port 14 are shared by reversing the progress of the card RC halfway. It can also be converted. Further, as described above, the card standby place can be set separately from the insertion slot 12.

抵抗体制御手段１５は、図７および図８に示されるように、消去ヘッド１０の温度測定用抵抗体３および発熱用抵抗体２に、直流またはパルスで電流を流し得るように電源３２、２２、その電源３２、２２のスイッチ手段ＳＷ、および分圧抵抗３１、２１をそれぞれ有している。この抵抗体制御手段１５には、それぞれの抵抗体３、２の温度を検出し得るように測定用温度検出手段１６および発熱用温度検出手段１７が接続され、さらに、発熱用抵抗体２の温度を一定の温度範囲に制御する温度の入力制御手段２３および安全手段２４が設けられている。さらに、抵抗体制御手段１５には、図示しないカード検知センサが設けられる場合もあり、その場合はカードＲＣが消去ヘッド１０の部分を通過したか否かを検出し、通過した場合には発熱用抵抗体２および温度検出用抵抗体３の通電を停止させることができる。このような検知センサがない場合でも、前述のように、搬送の開始から一定時間でオフにする時間制御をすることができる。   As shown in FIGS. 7 and 8, the resistor control means 15 supplies power sources 32 and 22 so that a current can be supplied to the temperature measuring resistor 3 and the heating resistor 2 of the erasing head 10 by direct current or pulse. The switch means SW of the power supplies 32 and 22 and the voltage dividing resistors 31 and 21 are provided. The resistor control means 15 is connected to a measurement temperature detection means 16 and a heat generation temperature detection means 17 so as to be able to detect the temperature of each of the resistors 3 and 2, and further to the temperature of the heat generation resistor 2. There are provided temperature input control means 23 and safety means 24 for controlling the temperature within a certain temperature range. Further, the resistor control means 15 may be provided with a card detection sensor (not shown). In this case, it is detected whether or not the card RC has passed the portion of the erasing head 10, and if it has passed, it generates heat. The energization of the resistor 2 and the temperature detecting resistor 3 can be stopped. Even when there is no such detection sensor, as described above, it is possible to perform time control to turn off at a fixed time from the start of conveyance.

温度測定用抵抗体３の温度を検出する測定用温度検出手段１６は、図７に温度検出用抵抗体３部分の構成ブロック図の一例が示されるように、温度検出用抵抗体３の両端に分圧抵抗３１を介して直流またはパルスの電源３２が接続されている。温度検出用抵抗体３は、前述のように、できるだけ温度係数の大きい材料（たとえば１０００〜３５００ｐｐｍ／℃）が用いられる。また、温度測定用抵抗体３は、その抵抗体３が設けられているヘッド基板表面の温度を検出するのが目的であるため、温度測定用抵抗体３自身が発熱して温度上昇することは好ましくない。そのため、温度測定用抵抗体３の抵抗値は小さくして、分圧抵抗３１の抵抗値を大きくし、また、分圧抵抗３１は温度係数の小さいものが望ましい。分圧抵抗３１は、温度の変化するヘッド基板と離れた場所に設けられるため、殆ど温度変化はないが、環境温度の変化の影響を受けなくするためである。具体的には、温度測定用抵抗体３の抵抗値が１２Ωで、分圧抵抗３１の抵抗値は１５０Ω程度のものが用いられ、電源に５Ｖの直流電源を用いることができる。   The measuring temperature detecting means 16 for detecting the temperature of the temperature measuring resistor 3 is provided at both ends of the temperature detecting resistor 3 as shown in an example of a block diagram of the temperature detecting resistor 3 in FIG. A DC or pulse power source 32 is connected via a voltage dividing resistor 31. As described above, the temperature detecting resistor 3 is made of a material having a temperature coefficient as large as possible (for example, 1000 to 3500 ppm / ° C.). Further, the temperature measuring resistor 3 is intended to detect the temperature of the surface of the head substrate on which the resistor 3 is provided, so that the temperature measuring resistor 3 itself generates heat and the temperature rises. It is not preferable. Therefore, the resistance value of the temperature measuring resistor 3 is reduced to increase the resistance value of the voltage dividing resistor 31, and the voltage dividing resistor 31 preferably has a small temperature coefficient. This is because the voltage dividing resistor 31 is provided at a location distant from the head substrate where the temperature changes, so that it hardly changes in temperature but is not affected by changes in the environmental temperature. Specifically, the resistance value of the temperature measuring resistor 3 is 12Ω, the resistance value of the voltage dividing resistor 31 is about 150Ω, and a 5V DC power source can be used as the power source.

測定用温度検出手段１６は、このような構成で、温度測定用抵抗体３の両端電圧を測定し（Ｖ検出）、その電圧の変化を求めることにより、温度の変化を計算してその時点での温度検出用抵抗体３の温度を求める構成になっている。すなわち、温度検出用抵抗体３は、温度により抵抗値が一定の割合で変化する温度係数を有しており、その温度係数は予め測定することにより（材料により定まるが、成分により異なるので測定により正確に求める）分っている。そのため、前述のように、温度測定用抵抗体３と直列に分圧抵抗３１を接続し、その両端に電源３２が接続されて、一定の電圧が印加されることにより、温度測定用抵抗体３の温度が変化すると、その抵抗値が変化して電流が変化する。分圧抵抗３１の抵抗値は変化しないため、温度測定用抵抗体３の両端電圧は、その抵抗体３の抵抗変化に応じて変化する。その電圧変化により、温度測定用抵抗体３の抵抗値がわかり、温度係数から変化前の温度に対する温度の変化量を知ることができ、その時点での温度測定用抵抗体３の温度を知ることができる。   With this configuration, the measurement temperature detection means 16 measures the voltage across the temperature measurement resistor 3 (V detection), calculates the change in the voltage by calculating the change in the voltage, and calculates the change in temperature at that time. The temperature of the temperature detecting resistor 3 is obtained. That is, the temperature detecting resistor 3 has a temperature coefficient that changes its resistance value at a constant rate depending on the temperature, and the temperature coefficient is determined by measuring in advance (which depends on the material, but varies depending on the component, so that I know exactly) Therefore, as described above, the voltage dividing resistor 31 is connected in series with the temperature measuring resistor 3, the power source 32 is connected to both ends thereof, and a constant voltage is applied, whereby the temperature measuring resistor 3 is applied. When the temperature changes, the resistance value changes and the current changes. Since the resistance value of the voltage dividing resistor 31 does not change, the voltage across the temperature measuring resistor 3 changes according to the resistance change of the resistor 3. From the voltage change, the resistance value of the temperature measuring resistor 3 can be known, the amount of temperature change with respect to the temperature before the change can be known from the temperature coefficient, and the temperature of the temperature measuring resistor 3 at that time can be known. Can do.

なお、温度検出用抵抗体３の両端により電圧変化を測定している（Ｖ検出）が、これは温度変化により両端電圧の変化割合が大きい方が精度よく検出できるためで、分圧抵抗３１の両端電圧を測定しても温度変化を検出することはできる。   Note that the voltage change is measured at both ends of the temperature detection resistor 3 (V detection). This is because the higher the change rate of the voltage at both ends due to the temperature change, the more accurately it can be detected. A temperature change can be detected by measuring the voltage at both ends.

発熱用抵抗体２の温度を検出する発熱用温度検出手段１７も、図８にその一例の構成図が示されるように、同様の構成になっている。すなわち、発熱用抵抗体２も分圧抵抗２１と直列に接続され、その直列接続の両端に直流またはパルスの電源２２が接続されて、その分圧抵抗２１の両端の電圧を検出（Ｖ検出）し得るように構成されている。この場合、発熱用抵抗体２は、それ自身で発熱させることが目的であるため、発熱用抵抗体２の抵抗が分圧抵抗２１より遥かに大きい抵抗となるように形成され、たとえば発熱用抵抗体２の抵抗が８Ωで、分圧抵抗２１が０.２２Ω（電流が多くても電力を消費しないように小さく設定される）になるように形成されると共に、印加する電圧も２４Ｖ程度と高い電圧が印加されるようになっている。そのため、抵抗の小さい側である分圧抵抗２１により電圧検出（Ｖ検出）が行われているが、発熱用抵抗体２の両端の電圧を検出することもできる。   The heating temperature detection means 17 for detecting the temperature of the heating resistor 2 has the same configuration as shown in FIG. That is, the heating resistor 2 is also connected in series with the voltage dividing resistor 21, and a DC or pulse power source 22 is connected to both ends of the series connection to detect the voltage at both ends of the voltage dividing resistor 21 (V detection). It is configured to be able to. In this case, since the heating resistor 2 is intended to generate heat by itself, the heating resistor 2 is formed so that the resistance of the heating resistor 2 is much larger than the voltage dividing resistor 21. The resistance of the body 2 is 8Ω, and the voltage dividing resistor 21 is formed to be 0.22Ω (set to be small so as not to consume power even if the current is large), and the applied voltage is as high as about 24V. A voltage is applied. For this reason, voltage detection (V detection) is performed by the voltage dividing resistor 21 on the smaller resistance side, but the voltage across the heating resistor 2 can also be detected.

発熱用抵抗体２の場合、連続使用などにより温度が上昇し過ぎる場合には、その検出温度によって入力制御手段２３により電源２２の電圧を下げたり、デューティ駆動の場合にはそのデューティを下げるなどして入力を落すことにより、発熱用抵抗体２の温度を所定の温度範囲に制御することができる。また、連続動作などにより、ヘッド基板表面と発熱用抵抗体２との温度関係が変って、温度測定用抵抗体３の検出温度だけでは完全消去などを行えない場合には、両方の温度が所定の温度範囲に入った場合に搬送手段を駆動し得るようにする場合には、この発熱用抵抗体２の検出温度の情報は、搬送制御手段１８にも送られる。具体的な温度検出は、温度測定用抵抗体２の温度測定と同様に行うことができる。   In the case of the heating resistor 2, when the temperature rises excessively due to continuous use or the like, the voltage of the power supply 22 is lowered by the input control means 23 according to the detected temperature, or the duty is lowered in the case of duty driving. By reducing the input, the temperature of the heating resistor 2 can be controlled within a predetermined temperature range. Further, when the temperature relationship between the head substrate surface and the heating resistor 2 changes due to continuous operation or the like and complete erasure cannot be performed only by the temperature detected by the temperature measuring resistor 3, both temperatures are predetermined. When the conveyance means can be driven when the temperature range is entered, information on the detected temperature of the heating resistor 2 is also sent to the conveyance control means 18. Specific temperature detection can be performed in the same manner as the temperature measurement of the temperature measuring resistor 2.

さらに、図８に示される例では、発熱用温度検出手段１７により検出される温度が、たとえば消去温度とする１３０℃よりもさらに一定の温度、たとえば３０℃程度を超えた温度を示す場合に、直ちに電源２２のスイッチＳＷをオフにするか、または入力制御手段２３に入力を極端に下げる指示を出す安全手段２４が設けられている。このような安全手段２４が設けられていることにより、たとえばカードが挿入されないで空焚きされて温度が異常に上昇する場合には、時間制御のたとえば２.５秒が経過していなくても直ちに電源２２をオフにするか、入力を極端に下げることができ、消去ヘッドのオーバーヒートによる破損を防止したり火災の発生などを防止することができる。   Further, in the example shown in FIG. 8, when the temperature detected by the heat generation temperature detection means 17 shows a temperature more than a constant temperature, for example, about 30 ° C., for example, 130 ° C. as the erasing temperature, A safety means 24 is provided to immediately turn off the switch SW of the power supply 22 or to instruct the input control means 23 to extremely reduce the input. By providing such safety means 24, for example, when the card is blown without being inserted and the temperature rises abnormally, even if 2.5 seconds of time control has not passed, for example, immediately. The power supply 22 can be turned off or the input can be extremely lowered, so that the erasing head can be prevented from being damaged due to overheating or a fire can be prevented.

すなわち、カードの搬送に異常が生じたり、発熱体に異常が生じたりした場合に、時間制御による待ち時間なく、直ちに入力を制御することができ、安全を確保することができる。当然のことながら、カードが挿入されず、温度が所定温度（たとえば前述の例では１３０℃）より高くなっても、さらに一定温度（前述の例では３０℃）高い温度（たとえば１６０℃）に達しなければ、通常の入力制御手段２３により制御することができる。この一定の温度は、消去ヘッドの温度が装置などにより定まる許容温度（仕様書上の保証温度より若干低い温度）になるよう（許容温度から所定温度を引いた温度）に設定することができる。   In other words, when an abnormality occurs in the card conveyance or an abnormality occurs in the heating element, the input can be immediately controlled without waiting time by time control, and safety can be ensured. As a matter of course, even if the card is not inserted and the temperature is higher than a predetermined temperature (for example, 130 ° C. in the above example), the temperature reaches a certain temperature (for example, 30 ° C. in the above example) higher (for example, 160 ° C.). If not, it can be controlled by the normal input control means 23. This constant temperature can be set to an allowable temperature (a temperature slightly lower than the guaranteed temperature on the specifications) determined by the apparatus or the like (a temperature obtained by subtracting a predetermined temperature from the allowable temperature).

なお、図８に示される例では、安全手段２４を入力制御手段２３と別個に設けた例が示されているが、入力制御手段２３の中にこの安全手段２４が設けられる構成でもよい。この場合、発熱用温度検出手段１７からの温度が所定温度より一定温度高い温度の場合には、通常の入力制御よりも大きく入力を下げるか０にすることにより安全手段とすることができる。   In the example shown in FIG. 8, an example in which the safety unit 24 is provided separately from the input control unit 23 is shown. However, the input control unit 23 may be provided with the safety unit 24. In this case, when the temperature from the heat generation temperature detecting means 17 is a temperature that is higher than the predetermined temperature by a certain temperature, it can be made a safety means by lowering the input to 0 or setting it to 0 more than the normal input control.

搬送制御手段１８は、搬送手段１３のオンオフを制御するもので、前述の温度測定用抵抗体の測定用温度検出手段１６から、温度測定用抵抗体の温度が所定の温度に達したという情報、または測定用および発熱用の温度検出手段１６と１７から、温度測定用抵抗体および発熱用抵抗体の温度がそれぞれ所望の温度に達したという情報、に基づいて、搬送手段を駆動させ、カードＲＣが排出口１４に達したという情報に基づいて、または搬送開始から一定時間の経過後に搬送手段１３を停止させるように構成されている。   The conveyance control means 18 controls on / off of the conveyance means 13, and information that the temperature of the temperature measurement resistor has reached a predetermined temperature from the measurement temperature detection means 16 of the temperature measurement resistor described above, Alternatively, the conveying means is driven based on the information that the temperature of the temperature measuring resistor and the heat generating resistor have reached the desired temperatures from the measuring and heat generating temperature detecting means 16 and 17, and the card RC Is configured to stop the conveying means 13 on the basis of the information that has reached the discharge port 14 or after a lapse of a certain time from the start of conveyance.

つぎに、この消去装置の動作について説明をする。まず、カードＲＣが挿入口１２に挿入されると、カードＲＣの検知情報が抵抗体制御手段１５に送られ、発熱用抵抗体２および温度測定用抵抗体３に通電が開始される。通電開始後における温度測定用抵抗体３の温度および発熱用抵抗体２の温度は、それぞれ測定用および発熱用の温度検出手段１６と１７により検出される。そして、たとえば測定用温度検出手段１６により温度測定用抵抗体２の温度が所定の温度に達した場合には、その情報が搬送制御手段１８に送られ、搬送手段１３（１３ａ、１３ｂ、１３ｃ）を駆動する。その結果、挿入口１２に挿入されたカードＲＣがローラ１３ａ、１３ｂにより搬送されて消去ヘッド１０とプラテンローラ１０ａとの間に送られる。消去用ヘッド１０の発熱用抵抗体の温度は所定の温度に達しているため、消去ヘッド１０上を通過したカードＲＣの画像は消去温度になり消色される。この消色されたカードＲＣが消去ヘッド１０を通過し終ると、センサまたは時間制御によりその情報が抵抗体制御手段１５に送られて抵抗体２、３への通電が停止される。その後、カードＲＣが排出口１４に達すると、センサまたは時間制御によりその情報が搬送制御手段１８に送られて搬送手段１３が停止される。   Next, the operation of this erasing device will be described. First, when the card RC is inserted into the insertion slot 12, detection information of the card RC is sent to the resistor control means 15, and energization of the heating resistor 2 and the temperature measuring resistor 3 is started. The temperature of the temperature measuring resistor 3 and the temperature of the heating resistor 2 after the start of energization are detected by measuring and heating temperature detecting means 16 and 17, respectively. For example, when the temperature of the temperature measurement resistor 2 reaches a predetermined temperature by the measurement temperature detection means 16, the information is sent to the conveyance control means 18, and the conveyance means 13 (13a, 13b, 13c). Drive. As a result, the card RC inserted into the insertion slot 12 is conveyed by the rollers 13a and 13b and sent between the erasing head 10 and the platen roller 10a. Since the temperature of the heating resistor of the erasing head 10 has reached a predetermined temperature, the image of the card RC that has passed over the erasing head 10 becomes the erasing temperature and is decolored. When the erased card RC has passed through the erasing head 10, the information is sent to the resistor control means 15 by a sensor or time control, and the energization of the resistors 2 and 3 is stopped. Thereafter, when the card RC reaches the discharge port 14, the information is sent to the transport control means 18 by a sensor or time control, and the transport means 13 is stopped.

これにより１枚のカードの消去作業が終了し、つぎのカードを消去する場合には、同様に繰り返すことにより行うことができる。この一連の動作を２枚のカードで連続して行った場合における抵抗体および搬送手段のオンオフの関係は図６に示されるようになる。   As a result, the erasing operation of one card is completed, and when the next card is erased, it can be repeated in the same manner. FIG. 6 shows the on / off relationship between the resistor and the conveying means when this series of operations is continuously performed with two cards.

すなわち、本発明では、温度測定用抵抗体の温度（ヘッド基板表面の温度）が所定の温度に達した場合に搬送手段１３を駆動して、カードＲＣを消去ヘッド１０に送り込むことに特徴がある。これは、本来カードが接触する発熱用抵抗体の温度が所望の温度に達していれば消去することができる筈であるが、前述のように、消去作業を始める最初の数枚に消去ムラが生じることがあり、本発明者が鋭意検討を重ねて調べた結果、カードは一般的に５ｃｍ以上×８ｃｍ以上で、厚さも種々のものがあり、発熱用抵抗体は小さく熱を奪われることにより温度低下が生じることにあることを見出し、発熱用抵抗体が設けられるヘッド基板表面の温度が所定の温度に達すれば、ある程度の熱容量を確保することができ、カードと接触しても、必要な温度をキープできることを見出したものである。   That is, the present invention is characterized in that when the temperature of the temperature measuring resistor (the temperature of the head substrate surface) reaches a predetermined temperature, the conveying means 13 is driven to feed the card RC into the erasing head 10. . This should be able to be erased if the temperature of the heating resistor with which the card is originally in contact has reached the desired temperature. However, as described above, the first few sheets starting the erase operation have erase irregularities. As a result of extensive investigations by the inventor, the card is generally 5 cm or more × 8 cm or more, and there are various thicknesses. The heating resistor is small and deprived of heat. When the temperature of the head substrate surface on which the heating resistor is provided reaches a predetermined temperature, a certain amount of heat capacity can be secured, and even if it contacts with the card, it is necessary It has been found that the temperature can be kept.

この場合、たとえば通電から各部の時間に対する温度変化の例が図９に示されるように、発熱用抵抗体の温度変化Ｄと、ヘッド基板表面の温度変化Ｃはほぼ平行関係にあり、発熱用抵抗体の温度の所定温度を高く設定しておけば少々熱を奪われても消去に支障が無いように思える。しかし、初期（ｔ＝０）の発熱用抵抗体の温度とヘッド基板表面の温度が異なると、時間に対する温度変化も変る。そのため、連続動作などにより基板温度が上昇していると、カードと接触しても温度の低下は小さいため、所定温度を高く設定していると温度が高すぎて完全な消去を行えないという問題が発生する。また、発熱用抵抗体近傍の熱容量を大きくしたり、ヘッド基板裏面の温度が所定温度に達してから消去作業を行うようにしたりすると、通電を開始してから消去作業を行うまでの時間が従来の消去ヘッドのように１５秒程度と長くなり、必要なときのみ通電を開始して不要な場合にはオフにするというオンデマンドの動作をするのに適しない。   In this case, for example, as shown in FIG. 9, an example of the temperature change with respect to the time of each part from energization, the temperature change D of the heating resistor and the temperature change C of the head substrate surface are in a substantially parallel relationship. If the body temperature is set high, it seems that there is no problem in erasure even if a little heat is taken away. However, if the temperature of the heating resistor in the initial stage (t = 0) and the temperature of the head substrate surface are different, the temperature change with respect to time also changes. Therefore, if the substrate temperature rises due to continuous operation etc., the temperature drop is small even if it contacts the card, so if the predetermined temperature is set high, the temperature is too high and complete erasure cannot be performed Will occur. Also, if the heat capacity near the heating resistor is increased, or if the erasing operation is performed after the temperature of the back surface of the head substrate reaches a predetermined temperature, the time from the start of energization to the erasing operation is conventional. It is as long as about 15 seconds as in the case of the erasing head, and is not suitable for an on-demand operation of starting energization only when necessary and turning it off when unnecessary.

しかし、前述の本発明者の検討により、ヘッド基板表面の温度が所定の温度に達すれば、カードと接触してもある程度の熱容量が確保され、発熱用抵抗体の温度が急激に低下することが無く、完全な消去作業を行うことができる。そのため、たとえば図９に示される例で、発熱用抵抗体（Ｄ）の所定温度１５０℃、ヘッド基板表面（Ｃ）の所定温度１２０℃を得るのに、２.５秒程度で上昇させることができながら、安定した消去を行うことができる。これは、消去ヘッドにおいて、図１に示されるように、熱抵抗層４が放熱板５との間に介在されていることにも大きく依存しているが、ヘッド基板表面の温度により制御するという新しい発想により達成できたものである。なお、図９は、発熱用抵抗体の幅が２.５ｍｍで抵抗値が７.７７Ω、カードの送り速度が３０ｍｍ／ｓで、カードを消去ヘッドに接触させた状態での通電開始からの時間に対する発熱用抵抗体（Ｄ）、ヘッド基板表面（Ｃ）、カード（Ｂ）および放熱板（Ａ）の温度変化を示す図で、カードの温度（Ｂ）は、発熱抵抗体で加熱されて４.５ｍｍ出てきた位置（０.１５秒後の位置）で、そ表面を赤外線温度計で測定した温度変化である。また、Ｅはカードを挿入しない空炊きの状態のヘッド基板表面の温度変化を、Ｆは空炊き状態の発熱用抵抗体の温度変化を示している。   However, if the temperature of the head substrate surface reaches a predetermined temperature as a result of the above-described investigation by the present inventors, a certain amount of heat capacity can be secured even when contacting the card, and the temperature of the heating resistor can be drastically lowered. And complete erasure work can be performed. Therefore, for example, in the example shown in FIG. 9, in order to obtain the predetermined temperature 150 ° C. of the heating resistor (D) and the predetermined temperature 120 ° C. of the head substrate surface (C), the temperature can be increased in about 2.5 seconds. However, stable erasing can be performed. This is largely dependent on the fact that the thermal resistance layer 4 is interposed between the radiating plate 5 in the erasing head as shown in FIG. 1, but is controlled by the temperature of the head substrate surface. This was achieved by new ideas. 9 shows the time from the start of energization when the width of the heating resistor is 2.5 mm, the resistance value is 7.77 Ω, the card feed speed is 30 mm / s, and the card is in contact with the erasing head. Is a diagram showing temperature changes of the heating resistor (D), the head substrate surface (C), the card (B), and the heat sink (A). The temperature (B) of the card is heated by the heating resistor 4 This is a change in temperature when the surface is measured with an infrared thermometer at a position of 0.5 mm (position after 0.15 seconds). E indicates the temperature change of the surface of the head substrate in an empty cooking state where no card is inserted, and F indicates the temperature change of the heating resistor in the empty cooking state.

この初期温度の違いによる所定の温度に達する時間の変化は、たとえば図６に２個のカードを連続して消去作業した場合に、１個目のカードで、抵抗体の通電が開始されてからカードが挿入口から移動するまでの時間ｔ１に対して、引き続き行う２個目のカードでは、時間ｔ２がｔ１よりも短くなっていることからも窺える。これは、１個目のカードの消去作業でヘッド基板の温度がある程度上昇しており、２個目のカードの挿入により通電が開始された場合に、短い時間でヘッド基板表面の温度が所定の温度に達し、短時間で消去作業を行えることを示している。このように、長時間の放置後に動作を始めても２.５秒程度で所定の温度に到達して１工程を５秒程度で消去作業を行え、連続して行う場合には、さらに短時間で行うことができ、しかも、長時間連続動作させてもオーバーヒート（過熱）することがない。これは、消去ヘッドのヘッド基板が所望の熱抵抗層を介して熱伝導率の大きい放熱板に保持されているため、ある程度の熱伝導阻止により短時間で所定の温度に達しながら、長時間動作に対しては放熱板に熱が逃げるためと考えられる。   The change in the time to reach a predetermined temperature due to the difference in the initial temperature is, for example, when two cards are continuously erased in FIG. 6 and the first card starts energizing the resistor. It can also be seen from the fact that the time t2 is shorter than t1 in the second card to be continuously executed with respect to the time t1 until the card moves from the insertion slot. This is because the temperature of the head substrate rises to some extent in the erasing operation of the first card, and when the energization is started by inserting the second card, the temperature of the head substrate surface is kept at a predetermined value in a short time. It shows that the temperature is reached and the erasing operation can be performed in a short time. As described above, even if the operation is started after being left for a long time, the temperature reaches the predetermined temperature in about 2.5 seconds, and the erasing operation can be performed in about 5 seconds. Moreover, even if it is operated continuously for a long time, it does not overheat (overheat). This is because the head substrate of the erasing head is held on a heat sink with high thermal conductivity through a desired thermal resistance layer, so that it can operate for a long time while reaching a predetermined temperature in a short time by blocking heat conduction to some extent. It is considered that heat escapes to the heat sink.

上述の例では、測定用温度検出手段１６の情報のみで搬送手段１３を駆動したが、これは、通常の動作開始では、発熱用抵抗体の温度が上昇してその温度によりヘッド基板の温度が上昇し、温度測定用抵抗体の温度が上昇するため、温度測定用抵抗体の温度が１２０℃程度に上昇すれば、発熱用抵抗体の温度も所定の１５０℃程度に上昇しているからである。そのため、オンデマンドにより間欠的に動作させる場合には、温度測定用抵抗体のみの温度をモニターして所定の温度に上昇したら、搬送手段をオンにして問題はない。しかし、連続動作などにより、たとえばヘッド基板の温度が相当高くなっているような場合には、ヘッド基板表面の所定温度１２０℃は直ちに達するにも拘わらず、発熱用抵抗体の所定温度１５０℃が遅れる場合がある。このような場合には、発熱用抵抗体の温度情報も搬送制御手段に送って、両方の温度が所定の温度に達してから搬送手段を駆動させるのが確実である。   In the above example, the conveying means 13 is driven only by the information of the measurement temperature detecting means 16, but this is because the temperature of the heating resistor rises at the start of normal operation, and the temperature of the head substrate is caused by that temperature. Since the temperature of the temperature measuring resistor rises and the temperature of the temperature measuring resistor rises to about 120 ° C., the temperature of the heating resistor also rises to the predetermined 150 ° C. is there. For this reason, in the case of intermittent operation on demand, there is no problem if the conveying means is turned on when the temperature of only the temperature measuring resistor is monitored and rises to a predetermined temperature. However, for example, when the temperature of the head substrate is considerably high due to continuous operation or the like, the predetermined temperature of 150 ° C. of the heating resistor is increased even though the predetermined temperature of 120 ° C. of the head substrate surface reaches immediately. There may be a delay. In such a case, it is certain that the temperature information of the heating resistor is also sent to the conveyance control means, and the conveyance means is driven after both temperatures reach a predetermined temperature.

本発明の記録消去装置に用いる加熱ヘッドの一例を示す平面および側面の説明図である。It is explanatory drawing of the plane and side which show an example of the heating head used for the recording-erasing apparatus of this invention. 図１の加熱ヘッドを用いて記録を消去する場合の概略説明図である。It is a schematic explanatory drawing in the case of erasing a record using the heating head of FIG. 本発明による記録消去装置の概略構成図である。1 is a schematic configuration diagram of a recording and erasing apparatus according to the present invention. 本発明による記録消去方法の一実施形態のフローチャートである。5 is a flowchart of an embodiment of a recording / erasing method according to the present invention. 本発明による記録消去方法の変形例を示すフローチャートである。It is a flowchart which shows the modification of the recording erase method by this invention. 図３に示される装置で、抵抗体への通電および搬送手段の駆動のオンオフの例を示すタイムチャートである。FIG. 4 is a time chart showing an example of on / off of energization of a resistor and driving of a conveying unit in the apparatus shown in FIG. 3. 抵抗体制御手段と測定用温度検出手段の一例を示す構成説明図である。It is composition explanatory drawing which shows an example of a resistor control means and a temperature detection means for a measurement. 抵抗体制御手段と発熱用温度検出手段の一例を示す構成説明図である。It is composition explanatory drawing which shows an example of a resistor control means and the temperature detection means for heat_generation | fever. 図１に示される加熱ヘッドの各部の温度特性の一例を示す図である。It is a figure which shows an example of the temperature characteristic of each part of the heating head shown by FIG. 記録媒体の発色、消色の温度に対する関係を示す図である。It is a figure which shows the relationship with respect to the temperature of color development and decoloring of a recording medium. 従来のリライタブルカードプリンタの一例の構成を示す図である。It is a figure which shows the structure of an example of the conventional rewritable card printer. 従来の消去ヘッドの一例を示す構成図である。It is a block diagram which shows an example of the conventional erasing head.

符号の説明Explanation of symbols

１ ヘッド基板
２ 発熱用抵抗体
３ 温度測定用抵抗体
４ 熱抵抗層
５ 放熱板
６ 配線基板
１０ 消去ヘッド
１３ 搬送手段
１５ 抵抗体制御手段
１６ 測定用温度検出手段
１７ 発熱用温度検出手段
１８ 搬送制御手段 DESCRIPTION OF SYMBOLS 1 Head board | substrate 2 Heating resistor 3 Temperature measuring resistor 4 Thermal resistance layer 5 Heat sink 6 Wiring board 10 Erase head 13 Conveying means 15 Resistor control means 16 Measurement temperature detecting means 17 Heating temperature detecting means 18 Conveyance control means

Claims (6)

ヘッド基板の一面に設けられる帯状の発熱用抵抗体、前記ヘッド基板の一面に設けられる温度測定用抵抗体、および前記ヘッド基板の前記一面と対向する他面側で、該ヘッド基板よりも熱伝導率が小さい熱抵抗層を介して該ヘッド基板を保持する放熱板を有する加熱ヘッドと、前記温度測定用抵抗体と直列に、該温度測定用抵抗体よりも温度係数の小さい温度係数を有する第一の分圧抵抗が接続され、前記ヘッド基板の前記一面の温度を検出する測定用温度検出手段と、前記発熱用抵抗体と直列に、該発熱用抵抗体よりも温度係数の小さい温度係数を有する第二の分圧抵抗が接続され、該発熱用抵抗体の温度を検出する発熱用温度検出手段と、記録媒体を挿入口から前記発熱用抵抗体上を通過させて排出口へ搬送する搬送手段と、記録媒体が記録媒体待機場所にきたら前記発熱用抵抗体および温度測定用抵抗体への通電をオンにし、前記記録媒体が前記発熱用抵抗体上を通過し終るか、または前記記録媒体の搬送開始から一定時間後に前記通電をオフにする抵抗体制御手段と、前記測定用温度検出手段により前記ヘッド基板の一面の温度が第一の所定の温度に達し、かつ、前記発熱用温度検出手段により前記発熱用抵抗体の温度が第二の所定の温度に達したら、前記搬送手段を駆動して前記記録媒体の搬送を始め、前記記録媒体が排出されるか、搬送開始から一定時間の経過後に前記搬送手段を停止させる搬送制御手段とを有する記録媒体の記録消去装置。 A belt-like heating resistor provided on one surface of the head substrate, a temperature measuring resistor provided on one surface of the head substrate, and heat conduction on the other surface side of the head substrate opposite to the one surface than the head substrate. A heating head having a radiator plate that holds the head substrate through a thermal resistance layer having a low rate and a temperature coefficient having a temperature coefficient smaller than that of the temperature measuring resistor in series with the temperature measuring resistor. A temperature dividing means connected to one voltage dividing resistor and detecting the temperature of the one surface of the head substrate ; and a temperature coefficient having a temperature coefficient smaller than that of the heating resistor in series with the heating resistor. A heat generating temperature detecting means for detecting the temperature of the heat generating resistor, and conveying the recording medium from the insertion port through the heat generating resistor to the discharge port. Means and recording medium When the recording medium standby position is reached, the energization of the heating resistor and the temperature measurement resistor is turned on, and the recording medium has passed over the heating resistor, or a certain period of time has elapsed from the start of conveyance of the recording medium. The temperature of one surface of the head substrate reaches a first predetermined temperature by the resistor control means for turning off the energization later and the temperature detecting means for measurement , and the heat generating resistance is detected by the heat generating temperature detecting means. When the body temperature reaches a second predetermined temperature, the conveying means is driven to start conveying the recording medium, and the recording medium is discharged, or the conveying means is moved after a certain time has elapsed from the start of conveying. A recording / erasing apparatus for a recording medium, comprising a conveyance control means for stopping the recording medium. 前記発熱用温度検出手段により検出される前記発熱用抵抗体の温度が前記第二の所定の温度より一定温度高くなり過ぎないように、前記発熱用抵抗体への入力を制御する入力制御手段が設けられてなる請求項１記載の記録消去装置。 Input control means for controlling the input to the heating resistor so that the temperature of the heating resistor detected by the heating temperature detection means does not become a constant temperature higher than the second predetermined temperature; recording and erasing apparatus provided comprising according to claim 1. 前記発熱用温度検出手段により検出される前記発熱用抵抗体の温度が前記第二の所定の温度より予め設定される一定温度高い温度になった場合に前記発熱用抵抗体への入力をオフまたは低下させる安全手段が設けられてなる請求項１または２記載の記録消去装置。 When the temperature of the heat generating resistor detected by the heat generating temperature detecting means is higher than the second predetermined temperature by a predetermined temperature, the input to the heat generating resistor is turned off or recording and erasing apparatus according to claim 1 or 2, wherein the safety means for decreasing is provided. ヘッド基板の一面に発熱用抵抗体を設け、該発熱用抵抗体の発熱により記録媒体の記録を消去する記録消去方法であって、前記ヘッド基板の一面に前記発熱用抵抗体とは別に前記ヘッド基板の一面の温度を測定する温度測定用抵抗体を設け、該温度測定用抵抗体と直列に該温度測定用抵抗体の温度係数より小さい温度係数を有する第一の分圧抵抗を設けて前記ヘッド基板の一面の温度を検出し、さらに前記発熱用抵抗体と直列に該発熱用抵抗体の温度係数より小さい温度係数を有する第二の分圧抵抗を接続して前記発熱用抵抗体の温度を検出し、前記ヘッド基板の一面の温度が第一の所定の温度に達し、かつ、前記発熱用抵抗体の温度が第二の所定の温度に達したら前記記録媒体を前記発熱用抵抗体上に送って前記記録媒体の記録を消去することを特徴とする記録消去方法。 The heat generating resistor provided on one surface of the head substrate, a recording and erasing method for erasing recording in a recording medium by heating the heat generating resistor, apart from the head and the heat generating resistor on a surface of the head substrate Providing a temperature measuring resistor for measuring the temperature of one surface of the substrate, and providing a first voltage dividing resistor having a temperature coefficient smaller than the temperature coefficient of the temperature measuring resistor in series with the temperature measuring resistor; A temperature of one surface of the head substrate is detected, and a second voltage dividing resistor having a temperature coefficient smaller than the temperature coefficient of the heating resistor is connected in series with the heating resistor, and the temperature of the heating resistor is determined. When the temperature of one surface of the head substrate reaches a first predetermined temperature and the temperature of the heating resistor reaches a second predetermined temperature, the recording medium is placed on the heating resistor. To delete the record on the recording medium Recording and erasing method comprising and. 前記第一および第二の所定の温度を、消去速度、消去頻度、周囲温度または記録媒体の種類に応じて、前記記録媒体の消去可能温度範囲の中で加熱する温度を定めて設定する請求項４記載の記録消去方法。 The first and second predetermined temperatures are determined by setting a heating temperature within an erasable temperature range of the recording medium according to an erasing speed, an erasing frequency, an ambient temperature, or a type of the recording medium. 4. The recording erasing method according to 4 . 前記記録媒体が消去装置の記録媒体待機場所に挿入されたら前記発熱用抵抗体および温度測定用抵抗体の通電スイッチをオンにし、前記ヘッド基板の一面の温度が前記第一の所定の温度に達し、かつ、前記発熱用抵抗体の温度が前記第二の所定の温度に達したら前記記録媒体を移動させる搬送手段を駆動して該記録媒体を前記発熱用抵抗体上に送り、該記録媒体が前記発熱用抵抗体上を通過し終るか、または搬送開始から一定時間の経過後に前記発熱用抵抗体および温度測定用抵抗体への通電をオフにし、前記記録媒体が前記消去装置の排出口に排出されるか、搬送開始から一定時間の経過後に前記搬送手段の駆動を停止させる請求項４または５記載の記録消去方法。 When the recording medium is inserted into the recording medium standby place of the erasing device, the energization switches of the heating resistor and the temperature measuring resistor are turned on, and the temperature of one surface of the head substrate reaches the first predetermined temperature. And, when the temperature of the heating resistor reaches the second predetermined temperature, the conveying means for moving the recording medium is driven to send the recording medium onto the heating resistor, After passing over the heating resistor, or after a certain time has elapsed from the start of conveyance, the energization of the heating resistor and the temperature measuring resistor is turned off, and the recording medium is placed in the discharge port of the erasing device or is discharged, according to claim 4 or 5 recording and erasing method according to stop driving of said conveying means after a predetermined time from the conveyance start.
JP2004094440A 2004-02-18 2004-03-29 Recording medium erasing apparatus and recording erasing method Expired - Fee Related JP4402999B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2004094440A JP4402999B2 (en) 2004-02-18 2004-03-29 Recording medium erasing apparatus and recording erasing method
DE602005013593T DE602005013593D1 (en) 2004-02-18 2005-02-17 Thermal head for erasing a printed image on rewritable media
EP05250909A EP1566275B1 (en) 2004-02-18 2005-02-17 A heating head for erasing a printed image on re-writable media
AT05250909T ATE427219T1 (en) 2004-02-18 2005-02-17 THERMAL HEAD FOR ERASING A PRINTED IMAGE ON REWRITABLE MEDIA
US11/061,856 US7206009B2 (en) 2004-02-18 2005-02-18 Heating head for erasing a printed image on re-writable media
US11/682,964 US7612790B2 (en) 2004-02-18 2007-03-07 Heating head for erasing a printed image on re-writable media

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JP4086252B2 (en) 2006-09-08 2008-05-14 株式会社リコー Information record erasing device
JP2008091321A (en) 2006-09-08 2008-04-17 Ricoh Co Ltd Heating device, erasing device, information recording and erasing device, and transfer device
JP2008062618A (en) * 2006-09-11 2008-03-21 Tdk Corp Thermal head for batch heating and printer
JP2011148319A (en) * 2011-04-18 2011-08-04 Toshiba Tec Corp Rewriting printer
JP7001390B2 (en) * 2017-08-17 2022-01-19 ローム株式会社 Thermal print head

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