JP2015215256A - Contact type thermometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact type thermometer fixing a thermocouple without being grounded, improving measurement accuracy by preventing extra noise from entering the thermocouple, and improving durability.SOLUTION: A contact body 10 includes an insulating film 13 with an electric insulation property covering an external surface of a thermocouple 12; and a first fixing plate 14 extended in a radial direction to intersect an arrangement direction of the thermocouple 12. The thermocouple 12 coated by the insulating film 13 is arranged along the surface not contacting a temperature measuring body of a contact part 16 of a contact plate 11, and the first fixing plate 14 is arranged on the opposite side of the contact plate 11 with respect to the thermocouple 12. Both of both end parts extended in the radial direction of the first fixing plate 14 are connected to the width end part of the contact plate 11, and the thermocouple 12 coated by the insulating film 13 is sandwiched and fixed between the contact plate 11 and the first fixing plate 14.

Description

  The present invention relates to a contact-type thermometer, and more specifically, a contact-type thermocouple can be fixed to a contact plate ungrounded to avoid extra noise entering the thermocouple and improve durability as well as measurement accuracy. Related to thermometer.

  A thermometer using a thermocouple cannot accurately measure temperature due to noise in the thermocouple signal when the thermocouple is electrically connected to the object to be measured.

  Therefore, a thermocouple element made of a dissimilar metal is embedded in a metal sheath that is sealed at the tip together with an electrical insulating material, and a thin metal plate for attaching to the surface of the temperature object is fixed to the outer surface of the metal sheath. An apparatus has been proposed (see, for example, Patent Document 1).

  This apparatus measures the temperature by attaching a base thin plate arranged in contact with the outer surface of the metal sheath facing the surface of the temperature-measured body to the surface of the temperature-measured body. Therefore, a contact-type thermometer (see, for example, Patent Document 2) that measures the temperature by increasing the contact area with the temperature-measured body by elastically deforming the contact plate that contacts the temperature-measured body is disclosed in Patent Document 1. Even if the apparatus described in the above is applied, the elastic deformation of the contact plate is hindered, so that the temperature cannot be measured with high accuracy.

  In addition, the device described in Patent Document 1 is provided with a cover thin plate that is attached in contact with the outer surface of the metal sheath that is not opposed to the surface of the temperature sensing body and that is joined and integrated with the base thin plate, at least at the tip of the metal sheath. It is welded to the outer surface. Therefore, even if it is applied to a contact-type thermometer as in Patent Document 2, there is a problem that welding is peeled off when measured a plurality of times.

JP 2012-88171 A Japanese Patent Publication No.46-25795

  The present invention has been made in view of the above problems, and the problem is that the thermocouple is fixed to the contact plate in a non-grounded manner, so that extra noise is prevented from entering the thermocouple, and durability with measurement accuracy is ensured. It is providing the contact-type thermometer which can improve.

  The contact-type thermometer of the present invention for solving the above-mentioned problem is a thermocouple having a temperature measuring unit formed by joining a thermocouple element made of a dissimilar metal to a contact body that contacts a temperature-measured body; A conductive contact plate that protrudes toward the measured temperature object and elastically deforms when contacting the measured temperature object, and the contact plate that contacts the measured temperature object and the non-measured temperature object A contact-type thermometer fixed to a surface of the contact portion that does not contact the temperature-measured body, wherein the contact body covers an outer surface of the thermocouple. An insulating film that is electrically insulative and a fixing plate that extends in a direction that intersects the direction in which the thermocouple is disposed, and the thermocouple that is covered by the insulating film is covered by the contact portion of the contact plate. The fixing plate is disposed along a surface that does not contact the temperature sensing element, and the fixing plate is opposite to the contact plate with respect to the thermocouple. Each of the both ends in the extending direction of the fixing plate is joined to the width end of the contact plate, and the thermocouple covered with the insulating film is connected between the contact plate and the fixing plate. It is the structure clamped between and fixed.

  According to this configuration, first, since the thermocouple is fixed to the contact plate by the fixing plate in a non-grounded state, that is, in a state where electricity is not conducted, the contact plate is used when measuring the temperature of the temperature measurement object. The thermocouple does not conduct with the temperature object even when pressed against the temperature object. As a result, it is possible to accurately measure the temperature of the temperature measuring object while avoiding excessive noise from entering the thermocouple signal.

  Secondly, since the thermocouple is fixed to the contact plate without using adhesive or welding, it will not peel off like adhesive or welding even if the contact plate is elastically deformed. It will not be released. Moreover, it can avoid that the elastic deformation of a contact plate is inhibited or the heat conduction from a contact plate falls. In addition, since the thermocouple is provided on the surface of the contact plate that does not contact the temperature object, the insulation film that covers the thermocouple during measurement is provided by the object to be measured. It is possible to avoid damage and peeling of the insulating film from the temperature measuring unit. Therefore, the durability of the contact thermometer can be improved.

  Especially this invention is suitable when measuring what flows electricity on the surface of to-be-measured bodies, such as an electric heater.

  On the other hand, a contact-type thermometer for solving the above-described problem is a thermocouple having a temperature measuring unit formed by joining a thermocouple element made of a dissimilar metal to a contact body that comes into contact with the temperature measured object. A conductive contact plate that protrudes toward the temperature sensing element and elastically deforms when contacting the temperature measurement object, and the contact portion that contacts the temperature measurement object and the non-contact that does not contact the temperature measurement object A contact-type thermometer in which the thermometer of the thermocouple is fixed to a surface of the contact portion that does not contact the temperature-measured body, wherein the contact body covers the outer surface of the thermocouple. A plurality of insulating plates, a fixing plate extending in a direction crossing the direction of arrangement of the thermocouple, and a plurality of plates arranged with a gap between the contact plates on both sides in the width direction of the contact plates Side contact plates, and the side contact plates along the contact portions side contact portions and the non-contact portion sides along the respective non-contact portions. The thermocouple covered with the insulating film is disposed along a surface of the contact plate that does not contact the temperature-measured body, and the fixing plate is attached to the thermocouple. On the opposite side of the contact plate, both ends of the fixing plate in the extending direction are joined to the contact portion side of each side plate and covered with the insulating film. The thermocouple is sandwiched and fixed between the contact plate and the fixing plate, and the contact portion of the contact plate is disposed on both sides via the thermocouple covered with the insulating film. It is the structure which extrudes to the to-be-measured body side rather than the said contact part side side part of the said side side board.

  According to this configuration, the same effect as described above can be obtained even in the configuration in which the side creeping plates are arranged on both sides in the width direction of the contact plate. In addition, when the contact plate and the side creepage plate are pressed against the temperature-measuring body, the contact portion of the contact plate is indirectly pushed to the temperature-measurement body side by the fixing plate. Located on the body side. Thereby, it is suppressed that the contact part of a contact plate leaves | separates from a to-be-measured body, and since it always closely_contact | adheres to a to-be-measured body, the temperature of a to-be-measured body can be measured accurately.

  The contact-type thermometer includes a plurality of the fixing plates, and the temperature measuring unit of the thermocouple is disposed at a central portion of the contact unit of the contact plate, covered with the insulating film, and the measuring unit. Each of the thermocouple wires led out from the warm portion is sandwiched and fixed between the contact plate and the fixing plate, and each of the thermocouple wires covered with the insulating film is attached to the contact portion. It is desirable that the contact portion is in contact with the surface of the contact portion that does not contact the temperature-measured body from the center portion to the lengthwise end portion of the contact portion.

  According to this configuration, each of the thermocouple wires covered with the insulating film derived from the temperature measuring unit comes into contact with the surface of the contact portion that does not come into contact with the temperature-measured body, so that the thermocouple wires are in contact with the contact plate. Since the heat is sufficiently transferred, the temperature can be accurately measured.

  In addition, in the above contact thermometer, the insulating film is composed of a film having a thickness of 0.01 mm or more and 0.05 mm or less formed by overlapping an aromatic polyimide and a fluororesin, and through the thermocouple. It is desirable that the plurality of the films are arranged so that the surfaces of the fluororesins face each other and the fluororesins of the films are heat-welded so that the thermocouple is covered with the films. According to this configuration, since the thermocouple can be easily covered by using the insulating film, the manufacturing cost can be reduced and the time required for the manufacturing can be shortened.

  Furthermore, in the above contact-type thermometer, it is desirable that the surface of the contact plate that comes into contact with the temperature object is covered with a protective film. According to this structure, it can prevent that a to-be-measured body is damaged by a contact plate by interposing a protective film between a contact plate and a to-be-measured body.

  According to the contact-type thermometer of the present invention, since the thermocouple is fixed to the contact plate by the fixing plate in a non-conductive state, the contact plate is pressed against the temperature-measured body when measuring the temperature of the temperature-measurement body. Even so, the thermocouple does not conduct to the temperature object. Therefore, it is possible to accurately measure the temperature of the temperature measuring object while avoiding excessive noise from entering the thermocouple signal. Therefore, measurement accuracy can be improved.

  In addition, since the thermocouple is fixed to the surface of the contact plate that does not contact the object to be measured without using an adhesive or welding, the elastic deformation of the contact plate, the decrease in heat conduction from the contact plate, and the thermoelectric Damage to the insulating film covering the pair can be avoided. Therefore, the durability of the contact thermometer can be improved.

It is a perspective view which shows an example of the contact body of 1st embodiment of the contact-type thermometer of this invention. It is sectional drawing shown by the arrow II of FIG. It is a perspective view which shows an example of 1st embodiment of the contact-type thermometer of this invention. It is the perspective view which showed the part of the head of FIG. It is a longitudinal cross-sectional view which shows the contact-type thermometer of FIG. It is a longitudinal cross-sectional view which shows an example of the operation | movement of the z direction of the contact-type thermometer of FIG. It is a cross-sectional view showing an example of the operation in the y direction of the contact thermometer of FIG. It is a cross-sectional view showing an example of the operation in the x direction of the contact thermometer of FIG. It is a perspective view which shows an example of the contact body of 2nd embodiment of the contact-type thermometer of this invention. It is sectional drawing shown by the arrow X of FIG. It is sectional drawing shown by the arrow XI of FIG. It is a perspective view which shows an example of 2nd embodiment of the contact-type thermometer of this invention. It is a longitudinal cross-sectional view which shows the contact-type thermometer of FIG. It is a longitudinal cross-sectional view which shows an example of the operation | movement of the z direction of the contact-type thermometer of FIG. It is a front view which shows the contact-type thermometer of a prior art, (a) shows the state which a temperature-measurement part floats, when a contact body is pressed on a to-be-measured body, (b) shows a to-be-measured body of a contact body When pressed against the body, the contact plate and the side creeping plate are distorted. FIG. 13 is a cross-sectional view illustrating an example of an operation in the y direction of the contact thermometer of FIG. 12. FIG. 13 is a cross-sectional view illustrating an example of an operation in the x direction of the contact thermometer of FIG. 12. It is sectional drawing which shows an example of the contact body of 3rd embodiment of the contact-type thermometer of this invention. It is a perspective view which shows an example of the contact body of 4th embodiment of the contact-type thermometer of this invention.

Hereinafter, embodiments of the contact-type thermometer of the present invention will be described. In the following embodiment, the thermocouple will be described by taking as an example a type K using chromel for the + pole and alumel for the − pole, but the present invention is a type E using chromel for the + pole and constantan for the − pole. In addition, the present invention can be applied to various types of thermocouples such as Type B using a platinum rhodium alloy (rhodium content 30%) for the positive electrode and a platinum rhodium alloy (rhodium content 6%) for the negative electrode. Further, the dimensions of the drawings are changed so that the configuration can be easily understood, and the ratios of the thicknesses, widths, lengths, and the like of the respective members and parts are not necessarily matched with those of the actually manufactured parts. In addition, in the drawings, the length direction of the portion of the contact plate that contacts the temperature-measured body is the x direction, the width direction is the y direction, and the thickness direction is the z direction.

  As shown in FIG. 1, the contact thermometer 1 </ b> A of the first embodiment includes a contact body 10, and the contact body 10 includes a contact plate 11, a thermocouple 12, an insulating film 13, a first fixing plate 14, and a second fixing. And a working plate 15. Further, the contact body 10 has an outer surface 10a including a surface facing the temperature-measured body, and inner side surfaces 10b and 10c opposite to the outer surface 10a, and the inner side surfaces 10c are surfaces facing each other in the x direction. It is.

  A part of the contact plate 11 including a portion that comes into contact with the temperature object when viewed from the y direction is formed of a conductive plate material made of a U-shaped nickel-base superalloy and protrudes toward the temperature object side. The contact plate 11 extends from the bent portion F1 adjacent to the contact portion 16 and the contact portion 16 extending in the x direction, the bent portion F1 disposed at both ends of the contact portion 16 in the x direction. And a non-contact portion 17. The contact portion 16 is a portion that comes into contact with the temperature-measured body when measuring the temperature of the temperature-measurement body, and the non-contact portion 17 is a portion that does not contact the temperature-measurement body.

  Further, when the contact body 10 is pressed by the temperature measurement object, the length L1 in the x direction of the contact portion when the contact portion 16 of the contact plate 11 is elastically deformed and contacts the temperature measurement object is: The thickness of the thermocouple 12 is preferably 20 times or more. In this embodiment, since the thermocouple 12 has a thickness of 0.1 mm, the length L1 is set to 2.0 mm or more.

  The thermocouple 12 is a thermocouple formed in a thin strip shape, and is disposed along the surface of the contact plate 11 that does not contact the temperature measurement object. The thermocouple 12 includes thermocouple wires 18A and 18B made of different metals and a temperature measuring unit 19 formed by joining the thermocouple wires 18A and 18B.

  In addition, the thermocouple 12 has a temperature measuring section 19 disposed at the center of the contact section 16 of the contact plate 11, and each of the thermocouple strands 18A and 18B led out from the temperature measuring section 19 in the x direction is a contact body. 10 are arranged along the inner side surfaces 10b and 10c.

  Specifically, each of the thermocouple wires 18A and 18B derived from the temperature measuring unit 19 is covered with the insulating film 13, and each of the thermocouple wires 18A and 18B covered with the insulating film 13 is first fixed. By being fixed to the contact plate 11 by the plate 14 and the plurality of second fixing plates 15, the inner surface 10 b is contacted from the center portion of the contact portion 16 of the contact plate 11 to the end portion in the x direction of the contact portion 16. To do. Thus, the thermocouple wires 18A and 18B covered with the insulating film 13 are brought into contact with the inner side surface 10b, so that the length L1 of the contact portion 16 contacting the temperature-measured body is 20 of the thickness of the thermocouple 12. When the temperature of the measured object is measured, heat is sufficiently transmitted from the measured object through the contact plate 11 so that the thermocouple 12 is sufficiently soaked.

  As shown in FIG. 2, the insulating film 13 is composed of films 13A and 13B formed by overlapping electrically insulating aromatic polyimide and electrically insulating fluororesin. The insulating film 13 covers at least a portion of the thermocouple 12 that contacts the contact plate 11. Therefore, in this embodiment, since the thermocouple 12 is also disposed along the non-contact portion 17 of the contact plate 11, the insulating film 13 is outside the portion of the thermocouple 12 in contact with the inner side surfaces 10 b and 10 c of the contact body 10. Cover the surface.

  The thickness d2 of the contact plate 11 is desirably 0.1 mm or more and 0.5 mm or less. If the thickness d2 is larger than 0.5 mm, the response speed when measuring the temperature of the temperature-measuring object is slow, and if the thickness d2 is smaller than 0.1 mm, the elastic force of the contact plate 11 is reduced and the measured temperature is decreased. It becomes easy to break when pressed by the temperature measuring element.

  The thicknesses d3 of the films 13A and 13B are preferably 0.01 mm or more and 0.05 mm or less, respectively. When the thickness d3 is larger than 0.05 mm, the response speed when measuring the temperature of the temperature-measured body is slow, and when the thickness d3 is smaller than 0.01 mm, the contact plate 11 and the first fixing plate 14 are measured. It becomes easy to be damaged when pinched with.

  The width B1 of the contact plate 11 is made wider than at least the width B2 of the insulating film 13 covering the thermocouple 12. By making the width B1 of the contact plate 11 wider than the width B2 of the insulating film 13, the thermocouple 12 is protected from direct contact with the temperature-measuring body and the durability is improved.

  As shown in FIG. 3, the first fixing plate 14 and the second fixing plate 15 are formed of a nickel-based superalloy conductive plate material similar to the contact plate 11, and in the arrangement direction of the thermocouple 12. It extends in the y direction that intersects a certain x direction. The first fixing plate 14 and the second fixing plate 15 are overlapped on the opposite side of the contact plate 11 with respect to the thermocouple 12. At this time, the position of the first fixing plate 14 is the position where the temperature measuring portion 19 of the thermocouple 12 is disposed, that is, the center portion of the contact portion 16 of the contact plate 11, and the position of the second fixing plate 15 is the contact plate. 11 is the contact portion 16 side of the non-contact portion 17.

  The first fixing plate 14 has both end portions in the y direction that is the extending direction at the width end portion of the contact portion 16 of the contact plate 11, and the second fixing plate 15 has the y direction that is the extending direction. Both end portions of the contact plate 11 are joined to the width end portion of the non-contact portion 17 of the contact plate 11 by spot welding.

  The contact thermometer 1A includes the contact body 10, the support body 20 that supports the contact body 10, a grip (not shown), and a connection line. The support 20 includes a head 21 that is disposed at an end portion on the temperature-detecting body side and from which the contact body 10 protrudes, and a lead-out tube 22 that is joined to the opposite end portion.

  The head portion 21 is formed of a thermoplastic resin injection-molded body, and includes a cylindrical cylindrical body 23 and two sets of collision members 24 protruding in a plate shape in the radial direction from the cylindrical surface of the cylindrical body 23.

  The cylindrical body 23 has an opening 25 opened at an end portion on the temperature-measuring body side and a notch 26 connected to the opening 25. The notches 26 are arranged between one set of collision members 24 and another set of collision members 24, that is, at positions facing each other on the cylindrical surface. It arrange | positions so that the contact part 16 of the contact plate 11 may protrude to the to-be-measured body side from the opening part 25 of this cylindrical body 23, a part of non-contact part 17 is arrange | positioned at the notch part 26, and the notch part 26 The inner side surfaces 10c of the arranged contact bodies 10 face each other in the x direction.

  Each of the collision members 24 constituting the set is opposed to each other via the notch portion 26 of the cylindrical body 23, and a part of the non-contact portion 17 of the contact plate 11 is disposed so as to be able to contact between the collision members 24 constituting the set. Is done.

  Further, the head 21 has a first support portion 27 that protrudes from the inner wall surface of the cylindrical body 23 toward the center portion of the cylindrical body 23, and a second support portion 28 that is joined to the inner wall surface of the cylindrical body 23. The first support part 27 and the second support part 28 support a part of the non-contact part 17 of the contact plate 11 in an unfixed state.

In addition, the head 21 includes a set of protruding pieces 29A and another set of protruding pieces 29B. The projecting pieces 29 </ b> A and 29 </ b> B are formed on the contact plate 11 from the inner wall surface of the head 21, specifically, the opposing surface of the collision member 24.
It protrudes in the y direction which is the width direction of the non-contact part 17. Further, each of the protruding pieces 29A as a set protrudes in a direction opposite to each other in the y direction, and the protruding pieces 29B as a set also protrude in the same manner.

  The protruding piece 29A is arranged at a position where it can come into contact with one of the inner surfaces 10c facing each other of the contact body 10, and the protruding piece 29B is arranged at a position where it can come into contact with the other. Further, the protruding pieces 29A and 29B are arranged at positions where they can come into contact with the end part in the y direction of the non-contact part 17 arranged to face the x direction via the contact part 16. In addition, the protruding pieces 29 </ b> A and 29 </ b> B are disposed at a position where they can come into contact with the contact portion 16 side of the non-contact portion 17, that is, near the bent portion F <b> 1 of the non-contact portion 17.

  Next, the manufacturing method of this contact-type thermometer 1A is demonstrated. First, the thermocouple 12 is created by joining the tip portions of the thermocouple wires 18A and 18B to form the temperature measuring section 19. Next, the fluororesin surfaces of the films 13A and 13B are opposed to each other, and the thermocouple 12 is sandwiched between them. Next, the films 13 </ b> A and 13 </ b> B are heated and thermally welded with a fluororesin, and the thermocouple 12 is covered with the insulating film 13.

  Next, the part 21A shown in FIG. 4 is paired with a thermoplastic resin in a mold and injection molded.

  Next, the contact plate 11 is fixed with a machine tool such as a jig and bent as shown in FIG. At this time, the bent portion F1 at both ends of the contact portion 16 of the contact plate 11 is folded in a mountain, the bent portion F2 on the contact portion 16 side of the non-contact portion 17 is folded, and the bent portion F3 on the end side of the non-contact portion 17 is folded. Make a valley fold. In this way, the contact portion 16 and the non-contact portion 17 are formed on the contact plate 11, and the first deformed portion 17 a bent in a substantially L shape from both ends of the contact portion 16 to the non-contact portion 17, and the first A second deformable portion 17b bent in the center direction from the end portion of the one deformable portion 17a and a third deformable portion 17c bent from the end portion of the second deformable portion 17b to the opposite direction side of the temperature measuring body are formed. To do.

  Next, the thermocouple 12 covered with the insulating film 13 is arranged on the inner side surfaces 10b and 10c of the bent contact plate 11, and the first fixing plate 14 is overlapped on the central portion of the contact portion 16 of the contact plate 11, and the non-contact portion. The second fixing plates 15 are respectively stacked on the contact portion 16 side of 17. Then, both end portions of the first fixing plate 14 and the second fixing plate 15 are joined to the width end portion of the contact portion 16 and the width end portion of the non-contact portion 17 by spot welding. In this way, the thermocouple 12 covered with the insulating film 13 is sandwiched between the contact plate 11, the first fixing plate 14 and the second fixing plate 15, and fixed to form the contact body 10.

  Next, the contact body 10 is attached to the part 21A. At this time, the contact portion 16 of the contact plate 11 is disposed so as to protrude from the opening 25 toward the temperature-measured body, and the first deformation portion 17a of the non-contact portion 17 is disposed in the cut portion 26 between the collision members 24. The second deformable portion 17b is disposed so as to be able to contact the second support portion 28, and the bent portion F3 between the second deformable portion 17b and the third deformable portion 17c can be contacted to the first support portion 27. Deploy. Moreover, the inner side surface 10c which the contact body 10 opposes is arrange | positioned so that contact with each of protrusion piece 29A, 29B is possible.

  Next, the head 21 is created by fitting the parts 21A and the paired parts together. Next, the outlet tube 22 is joined to the head 21. Then, the thermocouple 12 is led out from one end of the lead-out pipe 22 and joined to the connecting wire, and the manufacture of the contact thermometer 1A is completed.

  Next, the operation of the contact thermometer 1A will be described. As shown in FIG. 5, the contact body 10 is supported by the first support portion 27 and the second support portion 28 in a state where the contact body 10 is not pressed against the temperature measurement object. At this time, the contact portion 16 of the contact body 10 protrudes from the opening 25 toward the temperature-measured body.

  Further, as shown by the solid line in FIG. 6, in the state where the contact body 10 is pressed perpendicularly to the temperature-measured body, most of the contact portion 16 of the contact plate 11 of the contact body 10 is elastically deformed into a flat state. To do. On the other hand, the non-contact portion 17 is deformed such that the bent portion F2 and the bent portion F3 are bent and the bent portion F2 side of the second deformable portion 17b is moved upward. At this time, since the thermocouple 12 is covered with the insulating film 13, even if the contact body 10 is pressed by the temperature measurement object, it does not conduct with the temperature measurement object.

  As shown by the dotted line in FIG. 6, in a state where the contact body 10 is pressed against the temperature-measured body having an inclined surface, the contact portion 16 of the contact plate 11 of the contact body 10 is an inclined surface of the temperature-measurement body. Elastically deforms along In addition, the one non-contact portion 17 is deformed so that the bent portion F2 and the bent portion F3 are bent, and the bent portion F2 side of the one second deformable portion 17b is moved above the other second deformable portion 17b. To do. At this time, since the thermocouple 12 is covered with the insulating film 13, even if the contact body 10 is pressed by the temperature measurement object, it does not conduct with the temperature measurement object.

  As described above, the contact body 10 is supported on the support body 20 by the first support portion 27 and the second support portion 28 so that the contact body 10 is stressed when the contact body 10 is pressed against the temperature-measured body. It becomes the structure which does not start. Therefore, the durability of the contact body 10 is improved, the response speed is increased, and the measurement temperature is increased in accuracy.

  As shown in FIG. 7, when the support body 20 is moved in the y direction while the contact body 10 is pressed against the temperature-measured body, the y direction that is the width direction of each non-contact portion 17 of the contact body 10. One end portion is in contact with one side of the collision member 24 as a pair. Thereby, even if it is going to move the contact body 10 to the y direction with respect to the support body 20, since each non-contact part 17 and the collision member 24 of the contact body 10 are contacting, it will not deform | transform further. Thereby, the deformation | transformation of the y direction of the contact body 10 is suppressed.

  As shown in FIG. 8, when the support body 20 is moved in the x direction in a state where the contact body 10 is pressed against the temperature-measured body, one of the facing inner surfaces 10 c of the contact body 10 is It comes into contact with the protruding piece 29B as a set. More specifically, each protruding piece 29 </ b> B comes into contact with both end portions in the y direction, which is the width direction of the non-contact portion 17, on the inner surface of the non-contact portion 17 of the contact plate 11. Thereby, even if it is going to move the contact body 10 to the x direction with respect to the support body 20, since the inner surface 10c which the contact body 10 has opposed, and the protrusion piece 29B are contacting, it will not deform | transform further. . Thereby, the deformation | transformation of the x direction of the contact body 10 is suppressed.

  As described above, when an unexpected situation occurs during the measurement of the temperature of the temperature-measuring body and the support body 20 is moved, the collision member 24 or the protruding pieces 29A and 29B provided on the support body 20 and the contact body When 10 contacts, deformation of the contact body 10 is suppressed.

  In particular, when the support 20 is moved in the x direction, which is the length direction of the contact portion 16 of the contact plate 11, even if a force stronger than the elastic force of the contact body 10 is applied in the x direction, the protruding pieces 29A and 29B Suppresses the deformation of the contact body 10 in the x direction, thereby avoiding deformation and breakage of the contact body 10.

  Further, only when the support body 20 is moved in the x direction with respect to the contact body 10, one of the projecting pieces 29 </ b> A and 29 </ b> B comes into contact with one of the opposed inner side surfaces 10 c of the contact body 10. Since the elastic deformation of the contact body 10 at the time of measuring the temperature of the body to be measured is not hindered, the deterioration of the measurement accuracy is avoided.

  In addition, since the projecting pieces 29A and 29B come into contact with the bent portion F1 side of the non-contact portion 17, the deformation amount of the contact body 10 is minimized, and the deformation or breakage of the contact body 10 is surely avoided.

  Furthermore, since the protruding pieces 29A and 29B do not contact the thermocouple 12, damage to the thermocouple 12 that occurs when the protruding pieces 29A and 29B contact the thermocouple 12 is avoided.

  As shown in FIG. 9, the contact thermometer 1 </ b> B of the second embodiment includes a contact body 30, and the contact body 30 includes the same contact plate 11, thermocouple 12, and insulating film 13 as in the first embodiment. In addition, a side creeping plate 31, a first fixing plate 32, and a second fixing plate 33 are provided. The contact body 30 has an outer surface 30a including a surface facing the temperature-measured body, and inner side surfaces 30b and 30c opposite to the outer surface 30a, and the inner side surfaces 30c face each other.

  The side creeping plates 31 are disposed on both sides in the y direction, which is the width direction of the contact plate 11, with a gap between the side plates 31 and the contact plate 11. It is formed of a nickel-based superalloy conductive plate and protrudes toward the temperature-measured body. This side creeping plate 31 extends in the x direction and extends along the contact portion 16 along the contact portion side portion 34, the bent portion F1 disposed at both ends of the contact portion side alongside portion 34 in the x direction, and the contact portion side. It has a non-contact portion side along-side portion 35 that is adjacent to the side portion 34 and extends from the bent portion F <b> 1 and extends along the non-contact portion 17.

  The first fixing plate 32 is formed of a nickel-based superalloy conductive plate material similar to the contact plate 11 and extends in the y direction intersecting the x direction, which is the arrangement direction of the thermocouple 12. The first fixing plate 32 is overlapped with the thermocouple 12 on the side opposite to the contact plate 11 side. At this time, the position of the first fixing plate 32 is the position where the temperature measuring unit 19 is disposed with respect to the thermocouple 12, that is, the center of the contact portion 16 of the contact plate 11. The first fixing plate 32 has both ends in the y direction joined to the side side plates 31 by spot welding.

  In addition, as shown in FIG. 10, the first fixing plate 32 is configured so that the contact portion 16 of the contact plate 11 is connected to the contact portion of the side side plates 31 on both sides via the thermocouple 12 covered with the insulating film 13. It pushes out to the temperature object side rather than the side part 34. The thicknesses of the contact plate 11 and the side plate 31 are the same. Therefore, the contact plate 11 is pushed further to the temperature-measured body side than the side plate 31 by the thickness d4 of the thermocouple 12 and the insulating film 13 covering the thermocouple 12.

  The width B1 of the contact plate 11 is at least wider than the width B2 of the insulating film 13 that covers the thermocouple 12, that is, the films 13A and 13B, and wider than at least half of the width B3 of the contact body 30. By making the width B1 of the contact plate 11 wider than the width B2 of the insulating film 13, the thermocouple 12 is protected from direct contact with the temperature-measuring body and the durability is improved. Further, when the width B1 of the contact plate 11 is set to a width that is more than half of the width B3 of the contact body 30, even when the contact body 30 is shifted in the y direction, the deformation of the contact plate 11 is suppressed, Improve durability.

  The width B4 between the contact plate 11 and the side creeping plate 31 is preferably 0.2 mm or more and 0.3 mm or less. When the width B4 is smaller than 0.2 mm, the space between the contact plate 11 and the side creeping plate 31 is narrow, heat is transferred from the contact plate 11 in contact with the temperature-measured body to the side creeping plate 31, and high-precision measurement becomes difficult. . On the other hand, when the width B4 is larger than 0.3 mm, the contact plate 11 or the side creeping plate 31 can be greatly deformed in the y direction, and the durability of the contact body 30 is lowered.

  Therefore, considering the durability of the contact body 30 and the accuracy of the measurement results, the width B1 of the contact plate 11 is set to be more than half of the width B3 of the contact body 30, and the width B5 of the side creeping board 31 is It is desirable to set the width to about one fifth to one quarter.

As shown in FIG. 11, the second fixing plate 33 is formed of a nickel-based superalloy conductive plate material like the contact plate 11, and extends from one side creeping plate 31 to the other side creeping plate 31. It extends in the y direction. The second fixing plate 33 is overlapped on the opposite side of the contact plate 11 with respect to the thermocouple 12. At this time, the second fixing plate 33 is arranged at a position connecting the bent portion F1 side of the non-contact portion 17 of the contact plate 11 and the bent portion F1 of the non-contact portion side portion 35 of the side plate 31. The second fixing plate 33 is joined to both the contact plate 11 and the side creeping plate 31. Both end portions in the y direction of the second fixing plate 33 are joined to the side side plates 31 by spot welding, and the middle position of the second fixing plate 33 is spot welded to both width end portions of the contact plate 11. Be joined. Note that spot welding with the contact plate 11 avoids the thermocouple 12 covered with the insulating film 13.

  As shown in FIG. 12, the contact thermometer 1B includes a support body 40 that supports the contact body 30, a grip (not shown), and a connection line. The support body 40 includes a head 41 that is disposed at an end portion on the temperature-measured body side and from which the contact body 30 protrudes, and a lead-out pipe 42 that is joined to the end portion on the opposite side.

  The head 41 is formed of a metal workpiece and has a cylindrical body 43. The cylindrical body 43 has an opening 44 that opens at an end portion on the temperature-measured body side, and a notch 45 that is connected to the opening 44 at each position on the cylindrical surface facing each other. The contact portion 16 of the contact plate 11 and the contact portion side portion 34 of the side plate 31 are disposed so as to protrude from the opening 44 of the cylindrical body 43 toward the temperature-measured body, and the contact plate 11 is formed in the cut portion 45. The non-contact part 17 and the non-contact part side side part 35 of the side side plate 31 are arranged.

  Further, the head portion 41 has collision portions 46 at both end portions of two semicylindrical shapes formed by the cut portions 45 of the cylindrical body 43. In addition, the head portion 41 includes a retaining member 47 inside the cylindrical body 43 and projecting pieces 48 </ b> A and 48 </ b> B fixed to the retaining member 47.

  The retaining member 47 is formed of a cylindrical metal workpiece, and has one end sandwiched between the end portion of the contact body 30 and the inner bottom surface of the cylindrical body 43 while being joined to the inner bottom surface of the cylindrical body 43. Is done.

  The protruding pieces 48 </ b> A and 48 </ b> B are formed of a metal workpiece similar to the retaining member 47, and are disposed at the other end portion of the retaining member 47, from the end portion toward the inner side surface 30 c of the contact body 30 in the x direction. Protruding. In addition, the one set of protruding pieces 48A and the other set of protruding pieces 48B protrude in the opposite direction to the x direction.

  The protruding piece 48A is disposed at a position where it can come into contact with one of the mutually opposing inner side surfaces 30c of the contact body 30, and the protruding piece 48B is disposed at a position where it can contact the other. Further, the projecting piece 48A has a pair of non-contact portion side side portions 35 disposed opposite to both end portions in the y direction which is the width direction of one inner side surface 30c, that is, the x direction. It arrange | positions in the position which can contact an inner surface, and the protrusion piece 48B is arrange | positioned in the position which can contact the inner surface of the non-contact part side along part 35 of another group. In addition, the projecting pieces 48A and 48B are arranged at positions where they can come into contact with the contact portion side alongside 34 side of the non-contact portion side alongside 35, that is, near the bent portion F1 of the noncontact portion side alongside 35.

  Next, the manufacturing method of this contact-type thermometer 1B is demonstrated. First, the thermocouple 12 is covered with the insulating film 13 as in the first embodiment. Next, the cylindrical body 43 and the retaining member 47 are formed by processing the metal.

  Next, the thermocouple 12 covered with the insulating film 13 is disposed on the inner side surfaces 30 b and 30 c of the contact plate 11 that is not bent, and the side creeping plates 31 that are not bent are disposed on both sides in the width direction of the contact plate 11. Next, the first fixing plate 32 is overlapped on the center portion of the contact portion 16, and the second fixing plate 33 is overlapped on the contact portion 16 side of the non-contact portion 17. Next, both end portions of the first fixing plate 32 are joined to each side creeping plate 31 by spot welding. Next, the second fixing plate 33 is joined to each of the width end portions of the contact plate 11 and the side side plates 31 by spot welding. In this way, the thermocouple 12 covered with the insulating film 13 is sandwiched and fixed between the contact plate 11, the first fixing plate 32, and the second fixing plate 33.

Next, the contact plate 11 and the side creeping plate 31 which are integrated by the first fixing plate 32 and the second fixing plate 33 are fixed with a machine tool such as a jig, and bent as shown in FIG. To do. In FIG. 13, since the non-contact portion 17 is in a state of overlapping the side creeping board 31, the reference numeral indicating the non-contact portion 17 is added in parentheses to the reference numeral indicating the side creeping board 31. At this time, the bent portions F1 at both ends of the contact portion 16 of the contact plate 11 are folded in a mountain, and the bent portions F2 and F3 of the non-contact portion 17 are folded in a mountain. In this way, the contact portion 16 and the non-contact portion 17 are formed on the contact plate 11, and the first deformation portion 17 a that is bent in a substantially L shape from both ends of the contact portion 16 to the non-contact portion 17, A second deformed portion 17b that is bent in the center direction from the end portion of the first deformable portion 17a is formed. Similarly, the side creepage plate 31 is bent at the bent portion F1, and the bent portion F2 and the bent portion F3 are bent at a mountain fold to form the contact portion side portion 34 and the non-contact portion side portion 35, A first deformable portion 35a that is bent in an approximately L shape from both ends of the contact portion side portion 34 and a second deformable portion 35b that is bent in the center direction from the end portion of the first deformable portion 35a are formed.

  Next, end portions of the side creeping plates 31, that is, end portions of the second deformable portions 35 b are joined to form the contact body 30 in a rectangular ring shape when viewed from the side. At this time, the end portions of the contact plate 11 are not joined to each other, and the thermocouple 12 is led out between the end portions. In this way, the contact body 30 is created.

  Next, as shown in FIG. 13, the retaining member 47 is inserted into the ring of the contact body 30, and the contact body 30 and the retaining member 47 are inserted from the opening 44 of the cylindrical body 43 of the head 41. At this time, the contact part 16 of the contact plate 11 and the contact part side part 34 of the side plate 31 are protruded from the opening 44 toward the temperature-measured body, and the first deformation part 17a of the non-contact part 17 and the non-contact part 17 are not. The first deformed portion 35a of the contact portion side portion 35 is disposed so as to protrude from the cut portion 45, and both end portions in the y direction in the vicinity of the bent portion F1 are disposed so as to be able to contact each of the collision portions 46. . Moreover, the inner side surface 30c which the contact body 30 opposes is arrange | positioned so that each of protrusion piece 48A, 48B can contact.

  Next, the respective end portions of the contact plate 11 and the side creeping plate 31 are sandwiched and fixed between the retaining member 47 and the inner bottom surface of the cylindrical body 43. Next, the outlet pipe 42 is joined to the head 41. Then, the thermocouple 12 is led out from one end of the lead-out pipe 42 and joined to the connection line, and the manufacture of the contact thermometer 1B is completed.

  Next, the operation of the contact thermometer 1B will be described. As shown in FIG. 13, the contact body 30 is supported by the retaining member 47 in a state where the contact body 30 is not pressed against the temperature measurement object. At this time, a part of the contact body 30 protrudes from the opening 44 and the notch 45 toward the temperature-measured body. Further, the contact portion 16 of the contact plate 11 is indirectly pushed through the thermocouple 12 covered with the insulating film 13 by the first fixing plate 32, and is located closer to the temperature-measured body than the side plate 31. Yes. In addition, the non-contact portion 17 of the contact plate 11 and the non-contact portion-side portion 35 of the side contact plate 31 are either the non-contact portion 17 or the non-contact portion side portion 35 due to the second fixing plate 33. It is integrated without protruding.

  As shown by the solid line in FIG. 14, in a state where the contact body 30 is pressed perpendicularly to the temperature-measured body, the contact portion 16 of the contact plate 11 of the contact body 30 and the contact portion side alongside 34 of the side creeping plate 31. Each elastically deforms into a flat state. On the other hand, the first deforming portion 17a of the non-contact portion 17 of the contact plate 11 and the first deforming portion 35a of the non-contact portion side along-side portion 35 of the side plate 31 are elastically deformed so as to integrally spread outward. . At this time, in addition to its own elastic force, the contact portion 16 of the contact plate 11 is indirectly pushed out by the first fixing plate 32, and that portion is always the contact portion side alongside of the side side plate 31 on both sides. 34 is located on the temperature-measured body side from 34. At this time, since the thermocouple 12 is covered with the insulating film 13, even if the contact body 30 is pressed by the temperature object, it does not conduct with the temperature object.

  Here, the contact body 30X of the contact-type thermometer without the first fixing plate 32 shown in FIG. 15A, and the first fixing plate 32 and the second fixing plate 33 shown in FIG. 15B. Difference between the contact body 30Y having a short length between the contact body 30 and the contact body 30 of the contact thermometer 1B of this embodiment will be described. It is assumed that both ends of the contact bodies 30X and 30Y are fixed to the support body in the same manner as the contact body 30. When the contact body 30X without the first fixing plate 32 is pressed against the temperature object, the contact plate 11X is lifted away from the temperature object as shown in FIG. Further, when the contact body 30Y having a short length between the first fixing plate 32 and the second fixing plate 33 is pressed against the temperature-measured body, as shown in FIG. A large distortion occurs in the vicinity of the joint between the second fixing plate 33 and the second fixing plate 33.

  On the other hand, the contact-type thermometer 1 </ b> B indirectly pushes the contact plate 11 with the first fixing plate 32, thereby moving the contact portion 16 of the contact plate 11 from the contact-part side-side portion 34 of the side-side side plate 31. Is also pushed out to the temperature object side to avoid the contact portion 16 from being lifted. Further, the second fixing plate 33 is arranged at a position connecting the non-contact portion 17 of the contact plate 11 and the non-contact portion side along-side portion 35 of the side creeping plate 31 so that the first fixing plate 32 and the second fixing plate 33 are connected. By making the space between the plates 33 longer, the deformation amount of the contact plate 11 and the side creeping plate 31 is reduced, and the occurrence of distortion near the joint portion with the second fixing plate 33 is avoided.

  As shown in FIG. 16, when the support body 40 is moved in the y direction while the contact body 30 is pressed against the temperature-measured body, one end in the y direction that is the width direction of the contact body 30 is That is, one side creeping plate 31 comes into contact with a set of collision portions 46 arranged at both ends of one semicylindrical shape. Therefore, since one side creeping plate 31 of the contact body 30 and the collision part 46 are contacting, it does not deform | transform further. Thereby, the deformation | transformation of the y direction of the contact body 30 is suppressed.

  Further, at this time, the side creeping plate 31 in contact with the collision portion 46 tries to deform to the contact plate 11 side, but the non-contact portion 17 of the contact plate 11 and the non-contact portion side creeping portion 35 of the side creeping plate 31 are connected. The second fixing plate 33 holds a gap between the contact plate 11 and the side creeping plate 31 and suppresses deformation thereof.

  As shown in FIG. 17, when the support body 40 is moved in the x direction while the contact body 30 is pressed against the temperature-measured body, the inner portions disposed in the cut portions 45 of the contact body 30 are opposed to each other. One of the side surfaces 30c comes into contact with the projecting piece 48B as a pair. More specifically, the vicinity of the bent portion F1 on the inner surface of the non-contact portion side portion 35 of the pair of side creepage plates 31 arranged on the end portion side in the x direction of the contact portion 16 and each protruding piece 48B are in contact with each other. To do. Accordingly, since one of the opposed inner side surfaces 30c of the contact body 30 is in contact with the protruding piece 48B, no further deformation occurs. Thereby, the deformation | transformation of the x direction of the contact body 30 is suppressed.

  As described above, when an unexpected situation occurs during the measurement of the temperature of the temperature-measured body and the support body 40 is moved, the collision portion 46 provided on the support body 40 or the like, as in the first embodiment, When the projecting pieces 48 </ b> A and 48 </ b> B come into contact with the contact body 30, deformation of the contact body 30 is suppressed.

  According to the contact thermometers 1A and 1B, the thermocouple 12 is fixed to the contact plate 11 by the first fixing plate 14 and the second fixing plate 15 without grounding, or the thermocouple 12 is fixed first. The plate 32 and the second fixing plate 33 are fixed to the contact plate 11 without being grounded. That is, since the thermocouple 12 is fixed to the contact plate 11 without conducting electricity, the thermocouple 12 does not move even if the contact plate 11 is pressed against the measured temperature when measuring the temperature of the measured temperature. Does not conduct with the temperature object. Thereby, it is possible to avoid the excessive noise from entering the thermocouple 12 and to measure the temperature of the measured object with high accuracy.

  In addition, since the thermocouple 12 is fixed to the contact plate 11 without using an adhesive or welding, the thermocouple 12 is not peeled off like the adhesive or welding even if the contact plate 11 is elastically deformed. It will not be released. Moreover, it can avoid that the elastic deformation of the contact plate 11 is inhibited or the heat conduction from the contact plate 11 is lowered. In addition, since the thermocouple 12 is provided on the inner side surfaces 10b and 30b of the contact bodies 10 and 30, the insulating film 13 covering the thermocouple 12 during the measurement is measured because the thermocouple 12 is not in direct contact with the temperature measured body. It is possible to avoid the insulating film 13 from being peeled off from the temperature measuring unit 19 due to damage by the warm body. Therefore, the durability of the contact thermometers 1A and 1B can be improved.

  In addition, the thermocouple wires 18A and 18B covered with the insulating film 13 by the plurality of fixing plates of the first fixing plates 14 and 32 and the second fixing plates 15 and 33 are connected to the contact portion 16 of the contact plate 11. Since the thermocouple strands 18A and 18B are sufficiently soaked from the contact plate 11 by bringing them into contact with the surface that does not come into contact with the temperature measurement object from the center to the end in the x direction, the measurement accuracy is improved. can do.

  Furthermore, since the outer surface of the thermocouple 12 can be easily covered by thermally welding the films 13A and 13B formed by overlapping the aromatic polyimide and the fluororesin, the manufacturing cost can be reduced and the manufacturing time can be reduced. It can be shortened.

  As shown in FIG. 18, in addition to the configuration of the first embodiment, the contact thermometer 1 </ b> C of the third embodiment has an electrically insulating aromatic polyimide and an electrically insulating fluororesin on the outer surface 10 a of the contact body 10. Are formed by heat-welding a film (protective film) 50 formed by superimposing and. According to this configuration, the temperature sensor can be prevented from being damaged by the contact plate 11 by interposing the film 50 between the contact plate 11 and the temperature sensor. Similarly, a film may be thermally welded to the outer surface 30a of the contact body 30 of the second embodiment.

  As shown in FIG. 19, the contact-type thermometer 1D of the fourth embodiment includes a plurality of fixing plates 60A and 60B instead of the first fixing plate 14 and the second fixing plate 15 of the first embodiment. Prepare. Therefore, the temperature measuring unit 19 of the thermocouple 12 is not sandwiched between the fixing plates 60A and 60B, and the fixing plates 60A and 60B are arranged apart from the temperature measuring unit 19 in the x direction. Even in this configuration, the temperature measuring unit 19 covered with the insulating film 13 and the thermocouple wires 18A and 18B led out from the temperature measuring unit 19 are in contact with the surface of the contact plate 11 that does not contact the temperature measurement object.

  According to this configuration, since the temperature measuring unit 19 of the thermocouple 12 is not sandwiched between the fixing plates 60A and 60B, the response speed at the time of measurement can be increased. In addition, the number of parts is small and the number of processing steps can be reduced.

  In the above embodiment, an example in which a part of the contact bodies 10 and 30 is formed in a U shape when viewed from the y direction has been described, but the present invention is not limited to this. For example, a part of the contact body can be formed in an arc shape when viewed from the y direction, and the head portion of the support body can be formed in a spherical shape. Thus, even when the contact body is formed in an arc shape, when the contact body is pressed against the temperature-measured body, a non-contact portion that does not come into contact with the contact portion that contacts is formed.

  In the above embodiment, the head 21 is formed of a thermoplastic resin and the head 41 is formed of a metal workpiece. However, the head 21 is formed of a metal workpiece, and the head 41 is It can also be formed of a thermoplastic resin.

  In the above embodiment, since the thermocouple 12 is a strip-shaped thermocouple, the length L1 along the contact portion 16 of the contact plate 11 is set based on the thickness d1 of the thermocouple 12, but the cross section is circular. In the case of a linear thermocouple, the outer diameter is used as a reference.

  Further, in the second embodiment, the contact plate 11 and the side creeping plate 31 are separated from each other, and the contact body 30 connected by the first fixing plate 32 and the second fixing plate 33 has been described as an example. Is not limited to this. A configuration may be adopted in which a gap is formed in a single plate material to form a portion serving as a contact plate and a portion serving as a side plate, and a thermocouple covered with an insulating film is fixed by a fixing plate.

  In the third embodiment, an example in which the film 50 is used as the protective film has been described. However, it is only necessary to protect the temperature measurement object when the contact body 10 is pressed against the temperature measurement object. The material is not limited.

1A, 1B, 1C, 1D Contact thermometer 10, 30 Contact body 11 Contact plate 12 Thermocouple 13 Insulating film 13A, 13B, 50 Film 14, 32, 60A, 60B Fixing plate 15, 33 Auxiliary fixing plate 16 Contact Part 17 Non-contact part 18A, 18B Thermocouple wire 19 Temperature measuring part 20, 40 Support body 31 Side plate 34 Contact part side part 35 Non-contact part side part

Claims (5)

A thermocouple having a thermometer formed by joining a thermocouple element made of a dissimilar metal and a contact body that comes into contact with the temperature-measuring body and elasticity when projecting to the temperature-measuring body and contacting the temperature-measuring body A conductive contact plate that deforms, the contact plate having a contact portion that contacts the temperature-measured body and a non-contact portion that does not contact the temperature-measured body, and the temperature measurement portion of the thermocouple is the In the contact-type thermometer fixed to the surface of the contact part that does not contact the temperature object,
An electrically insulating insulating film covering the outer surface of the thermocouple and a fixing plate extending in a direction intersecting with the thermocouple arrangement direction;
The thermocouple covered with the insulating film is disposed along a surface of the contact plate that does not come into contact with the temperature-measured body, and the fixing plate is disposed on the contact plate with respect to the thermocouple. Placed on the opposite side,
Both ends in the extending direction of the fixing plate are joined to the width end of the contact plate, and the thermocouple covered with the insulating film is sandwiched between the contact plate and the fixing plate. The contact-type thermometer characterized by being configured to be fixed. A thermocouple having a thermometer formed by joining a thermocouple element made of a dissimilar metal and a contact body that comes into contact with the temperature-measuring body and elasticity when projecting to the temperature-measuring body and contacting the temperature-measuring body A conductive contact plate that deforms, the contact plate having a contact portion that contacts the temperature-measured body and a non-contact portion that does not contact the temperature-measured body, and the temperature measurement portion of the thermocouple is the In the contact-type thermometer fixed to the surface of the contact part that does not contact the temperature object,
The contact body has an electrically insulating insulating film that covers the outer surface of the thermocouple, a fixing plate that extends in a direction intersecting with the direction in which the thermocouple is disposed, and the contact on both sides in the width direction of the contact plate. A plurality of side creeping plates arranged with a gap between the plates, and the side creeping plates along the contact portion side along the contact portion and the non-contact portion side along each non-contact portion. And
The thermocouple covered with the insulating film is disposed along a surface of the contact plate that does not come into contact with the temperature-measured body, and the fixing plate is disposed on the contact plate with respect to the thermocouple. Placed on the opposite side,
The both ends of the fixing plate in the extending direction are joined to the side of the contact portion of the side plate, and the thermocouple covered with the insulating film is connected to the contact plate and the fixing plate. The contact portion of the contact plate is moved from the contact portion side of the side plate on both sides via the thermocouple in which the fixing plate is covered with the insulating film. The contact-type thermometer is also characterized in that it is configured to be pushed out toward the temperature-measured body.   The thermocouple element comprising a plurality of the fixing plates, wherein the thermocouple of the thermocouple is disposed at the center of the contact portion of the contact plate, covered with the insulating film, and led out from the thermometer Each of the wires is sandwiched and fixed between the contact plate and the fixing plate, and each of the thermocouple strands covered with the insulating film extends from the center portion of the contact portion in the length direction of the contact portion. The contact-type thermometer of Claim 1 or 2 which is the structure which contacts the surface which does not contact the to-be-measured body of the said contact part over the edge part. The insulating film is composed of a film having a thickness of 0.01 mm or more and 0.05 mm or less formed by overlapping an aromatic polyimide and a fluororesin,
The surface of the said fluororesin of the said several film is made to oppose through the said thermocouple, and it is the structure by which the said thermocouple is coat | covered with the said film by heat-welding the said fluororesin of the said film. 4. The contact-type thermometer according to any one of 3.   The contact-type thermometer according to claim 1, wherein a surface of the contact plate that comes into contact with the temperature-measured body is covered with a protective film.

Images