1. A specimen collecting method of collecting a specimen from a member whose surface is provided with a layer, the specimen collecting method comprising:
an incision forming step of forming a cylindrical incision by feeding a cylindrical cutter having a cylindrical cutting blade from the surface in the direction of thickness of the member to perform cutting; and
a specimen cutting away step of cutting away a specimen formed inside the incision by inwardly cutting the member from the cylindrical incision.
2. The specimen collecting method according to claim 1, further comprising an incision expanding step of cutting the member so that the incision is outwardly expanded after forming the cylindrical incision, wherein a rotating cutter having a disc-shaped cutting blade is inserted to the cylindrical incision to cut the member at the specimen cutting away step.
3. The specimen collecting method according to claim 1, wherein
the member is a blade of a gas turbine,
a surface of the blade is formed by providing a layer of a thermal barrier coat on a base material,
the cylindrical cutter is fed until the cylindrical cutter comes in contact with the base material at the incision forming step, and
the rotating cutter cuts the base material at the specimen cutting away step.
4. The specimen collecting method according to claim 2, wherein a plurality of incisions is formed so that the incisions partially overlap at the incision forming step.
5. A temperature estimating method of a blade in which a bond coat and a top coat are sequentially formed on a base material by using a specimen obtained by the specimen collecting method according to claim 4, wherein a relationship between a thickness and a temperature of an oxide scale layer of the blade, and time is obtained based on a test piece having a same composition as the blade, and then, by utilizing the relationship, a metal temperature of the blade is estimated based on the thickness of the oxide scale layer of the specimen obtained from the gas turbine.
6. A temperature estimating method of a blade formed with a top coat that is a ceramic layer on a base material by using a specimen obtained by the specimen collecting method according to claim 4, wherein an amount of a monoclinic crystal formed on the top coat of the obtained specimen is measured by X-ray diffraction method, and a surface temperature of the top coat is estimated based on the amount of the monoclinic crystal.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A printer comprising:
a platen unit having a platen roller for advancing recording paper;
a head unit having a thermal head with a plurality of heating elements provided thereto, the head unit being detachably combined with the platen unit;
a fixed blade incorporated in the platen unit;
a movable blade slidably incorporated in the head unit, the movable blade cutting the recording paper between the movable blade and the fixed blade;
a detected member provided to the platen unit, the detected member being positioned at a predetermined position of the head unit when the head unit is combined with the platen unit, and engaging the movable blade to move therewith as the movable blade slides; and
a sensor provided at the predetermined position of the head unit, the sensor detecting the detected member to detect that the movable blade is at an initial position.
2. A printer according to claim 1, wherein
the detected member is slidable together with the movable blade.
3. A printer according to claim 1, wherein
the detected member is rotatably supported by the platen unit and rotate with the sliding movement of the movable blade.
4. A printer according to claim 3, wherein
the detected member is arranged coaxially with the platen roller, and is rotatable independently from the platen roller as the movable blade slides.
5. A printer according to claim 1, wherein
the platen unit is provided with a biasing member biasing the detected member toward the predetermined position
6. A printer according to claim 2, wherein
the platen unit is provided with a biasing member biasing the detected member toward the predetermined position
7. A printer according to claim 3, wherein
the platen unit is provided with a biasing member biasing the detected member toward the predetermined position
8. A printer according to claim 4, wherein
the platen unit is provided with a biasing member biasing the detected member toward the predetermined position