JP2023004757A - Contact type thermometer - Google Patents

Abstract

To provide a contact type thermometer that lowers the contact pressure and improves the durability of a contact plate.SOLUTION: Provided is a contact type thermometer 1 comprising a head body 10, a contact plate 20, an urging member 30, and a temperature detection element 40. The head body 10 has a first support pin 11 and a second support pin 12 extending in a Y direction while being spaced apart from each other in an X direction. The first support pin 11 is located nearer to the tip side of the head body 10 than the second support pin 12 and comes closer to the side of the contact plate 20 that is opposite the side that is in contact with a measurement object than the second support pin 12. The contact plate 20 has: a first supporting hole 21 which is formed at one end part in the X direction and into which the first support pin 11 is inserted without backlash; and a second supporting hole 22 which is formed at the other end part and has a length in at least a Z direction longer than that of the first supporting hole 21 and into which the second support pin 12 is inserted with backlash, the contact plate being supported on the head body 10 in a manner to be swingable in the Z direction around the one end part thanks to a support structure that the one end part constitutes a rotating end and the other end part constitutes a free end.SELECTED DRAWING: Figure 3

Description

There is an application for exception to loss of novelty

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact thermometer, and more particularly to a contact thermometer that directly contacts a moving object to measure the temperature of the object.

2. Description of the Related Art Contact-type thermometers have been proposed that measure temperatures by directly contacting materials and products that move in various sheet-like manufacturing processes (see, for example, Non-Patent Document 1).

Anritsu Meter Co., Ltd., S-type series high-performance surface temperature sensor, general catalog of temperature measuring instruments, published in February 2020, pp.81-87

In a contact thermometer that directly contacts a moving object to be measured, when the contact pressure against the object to be measured increases, the frictional force between the contact plate of the contact thermometer and the object to be measured increases, generating frictional heat. Frictional heat is a factor of measurement error of the temperature of the object to be measured.

As illustrated in FIG. 7, the contact thermometer 100 described in Non-Patent Document 1 includes a head body 101, a contact plate 102, an urging member 103, and a temperature detection element 104. FIG. In the contact thermometer 100, each of the first support hole 107 and the second support hole 108 has play with respect to the first support pin 105 and the second support pin 106, and the contact plate 102 faces the object to be measured. It is a structure that moves parallel in the Z direction when it contacts.

In the contact thermometer 100, when the contact plate 102 is brought into contact with the object to be measured, the contact plate 102 translates in the Z direction, thereby reducing the contact pressure on the object to be measured. This is advantageous for reducing the frictional force between the contact plate 102 and the object to be measured, making it possible to suppress the generation of frictional heat.

However, the contact thermometer 100 has a structure in which the contact plate 102 is translated in the Z direction in order to reduce the contact pressure of the contact plate 102. distance is longer. Therefore, as indicated by the dotted line in the figure, when an unexpected force is applied to the contact plate 102 from the X direction, the contact plate 102 may be deformed with the support pin as a fulcrum.

SUMMARY OF THE INVENTION An object of the present invention is to provide a contact thermometer that can improve the durability of the contact plate while reducing the contact pressure.

The contact thermometer of the present invention, which solves the above problems, comprises a contact plate that protrudes from the tip of the head and is in direct surface contact with the object to be measured, and elastically urges the contact plate toward the object to be measured. and a temperature detecting element disposed on the opposite side of the surface of the contact plate that contacts the object to be measured and converting the temperature of the object to be measured into an electric signal, wherein: The head body has a first support pin and a second support pin spaced apart from each other in the longitudinal direction of the contact plate and extending in the width direction of the contact plate, wherein the first support pin is closer to the head than the second support pin. The contact plate is disposed on the distal end side of the body and is closer to the surface opposite to the contact surface than the second support pin, and the contact plate is formed at one end in the longitudinal direction to a first supporting hole into which the pin is inserted without play; and a second support hole into which the second support pin is inserted with play, the one end being a rotating end and the other end being a free end. The contact plate is supported by the head body so as to be swingable in the thickness direction of the contact plate with the portion as an axis.

In the present invention, one end of the support structure of the contact plate is a rotating end and the other end is a free end. It is possible to reduce the contact pressure when contacting the object. Further, according to the present invention, the distance between the first support pin and the contact plate is made close, so that the moment of the force acting on the contact plate with the first support pin as the fulcrum can be suppressed. Therefore, according to the present invention, the frictional force between the contact plate and the object to be measured is kept low to suppress the generation of frictional heat, and when the contact plate is brought into contact with the object to be measured, an unexpected Even if force is applied, deformation of the contact plate at one end can be suppressed.

1 is a perspective view illustrating an embodiment of a contact thermometer of the present invention; FIG. 1. It is a side view which illustrates the state which removes one front-end|tip side block of the contact-type thermometer of FIG. 1, and a contact plate does not touch a measuring object. FIG. 2 is a perspective view illustrating a supporting member of the contact plate of FIG. 1; 1. It is a side view which illustrates the state which removed one tip side block of the contact-type thermometer of FIG. 1, and the contact plate touched the measuring object. 2 is an exploded perspective view illustrating the end block, support and connecting rod of FIG. 1; FIG. 1. It is a side view which illustrates the state which removed one tip side block of the contact-type thermometer of FIG. 1, and the contact plate touched the measuring object. 1 is a side view illustrating a contact thermometer of the known art; FIG.

An embodiment of the contact thermometer of the present invention will be described below. In the drawing, the X direction indicates the longitudinal direction of the contact plate 20 of the contact thermometer 1 , the Y direction indicates the width direction of the contact plate 20 , and the Z direction indicates the plate thickness direction of the contact plate 20 . The plate thickness direction of the contact plate 20 is the direction of the contact portion between the contact plate 20 and the biasing member 30 . 1, the tip of each member of the contact-type thermometer 1 is on the upper side in the drawing, and the end is on the lower side of the drawing. In FIG. 2, the tip of each member of the contact-type thermometer 1 is It is the lower side in the drawing, and the end is the upper side in the drawing. In the drawings, the dimensions are changed so that the structure can be easily understood, and the proportions are not necessarily the same as those actually manufactured.

As illustrated in FIG. 1, in the contact thermometer 1 of the embodiment, a contact plate 20 protruding from the tip of a head 10 is elastically biased by a biasing member 30 to come into direct surface contact with an object to be measured. , the temperature detection element 40 converts the heat transmitted through the contact plate 20 and the biasing member 30 into an electric signal as the temperature of the object to be measured. The electrical signal converted by the contact thermometer 1 is sent to the measuring device through a signal line (not shown) led from the end of the support 50, and the measuring device displays the temperature of the object to be measured based on the electrical signal. do. The contact-type thermometer 1 and the measurement device are not limited to the configuration in which they are directly connected via a signal line, and the contact-type thermometer 1 and the measurement device may be configured to exchange data by wireless signals. A structure in which the measurement device is directly connected to the end of the support 50 without a wire may be used.

The contact thermometer 1 comprises a head 10, a contact plate 20, a biasing member 30, a temperature detection element 40, a support 50, and a connecting rod 60. As shown in FIG. The contact thermometer 1 has a contact plate 20 and an urging member 30 arranged on the distal end side of the head 10 and a support 50 arranged on the distal end side of the head 10 . The contact-type thermometer 1 has a support structure that supports the head body 10 so that the contact plate 20 can swing in the Z direction around one end of the contact plate 20 in the X direction on the distal end side, and a connecting rod 60 on the distal end side. It consists of two supporting structures, one supporting structure supporting the head 10 on the supporting body 50 so as to be swingable in the X direction.

The head body 10 is composed of a rectangular parallelepiped having a groove extending in the X direction and recessed from the tip end to the distal end at the tip, and both ends of the tip of the rectangular parallelepiped in the X direction are chamfered. The head body 10 consists of a distal central block 10a, two distal side blocks 10b and an end block 10c. The tip center block 10a has a first support pin 11, a second support pin 12, a projecting portion 13, a storage portion 14, a biasing support portion 15, and an element support portion 16 (not shown in FIG. 1). In the head body 10, tip side blocks 10b are arranged on both sides of the tip center block 10a in the Y direction, and grooves are formed between the tip side blocks 10b. The head body 10 consists of a distal central block 10a and two distal side blocks 10b each screwed to an end block 10c.

The contact plate 20 is supported by the head body 10 so as to protrude from the tip of the head body 10 . The contact plate 20 has a first support hole 21 into which the first support pin 11 is inserted at one end in the X direction, and a second support hole 22 into which the second support pin 12 is inserted at the other end. be done. The contact plate 20 consists of a contact plate body 23 and a support member 24 . The contact plate main body 23 has a substantially L shape when viewed in the Y direction, and has a first support hole 21 formed at one end and a bent portion 25 formed at the other end. The supporting member 24 has a U-shape when viewed in the X direction, and is joined to the surface of the contact plate main body 23 opposite to the surface in contact with the object to be measured. A hole 22 is formed.

The biasing member 30 is made of a material more elastic than the contact plate 20, and is in surface contact with the surface of the contact plate 20 opposite to the surface in contact with the object to be measured. Forms the shape of a rounded rectangle. The biasing member 30 is placed in the storage portion 14 of the head body 10 and supported by the biasing support portion 15 consisting of four support pins. The biasing member 30 elastically biases the contact plate 20 toward the object to be measured when the contact plate 20 contacts the object to be measured.

The temperature detection element 40 is arranged along the inner peripheral surface of the urging member 30 on the distal end side, and passes through the inside of the head body 10 and the support body 50 on the distal end side to serve as a signal line. As the temperature detection element 40, type K using chromel for the positive electrode and alumel for the negative electrode, type E using chromel for the positive electrode and constantan for the negative electrode, and a platinum rhodium alloy (30% rhodium content) for the positive electrode. , and type B using a platinum-rhodium alloy (6% rhodium content) for the - pole. The temperature detecting element 40 has a temperature sensing portion 43 formed by joining wires 41 and 42 made of dissimilar metals (not shown in FIG. 1). Bonded to the face.

The support 50 has a bar shape with its axis directed in the Z direction, and the temperature detection element 40 is arranged inside. The support 50 is connected to the head body 10 by a connecting rod 60 at its tip. The connecting rod 60 has a columnar shape with its axial direction directed in the Y direction.

As exemplified in FIG. 2, the support structure of the contact plate 20 on the front end side is such that one end of the contact plate 20 in the X direction is used as a rotating end and the other end is used as a free end to swing the contact plate 20 in the Z direction. It is a structure that supports the head body 10 as much as possible.

The first support pin 11 is inserted into a pin insertion hole formed on the tip side of the projecting portion 13 at one end in the X direction of the tip center block 10a, and is inserted into a pin insertion hole formed at the other end in the X direction. A second support pin 12 is inserted. In the tip central block 10a, an urging support portion 15 and an element support portion 16 are arranged in a housing portion 14 arranged in the center portion in the X direction.

The first support pin 11 forms a cylinder extending in the Y direction. The first support pin 11 has play in both the pin insertion hole of the projecting portion 13 of the head 10 and the first support hole 21 of the contact plate 20 in the assembled state of the contact thermometer 1. inserted without The first support pin 11 is arranged on the tip side of the second support pin 12 in the Z direction. The first support pin 11 is always in contact with the surface of the contact plate 20 opposite to the surface 20c that contacts the object to be measured.

The second support pin 12 forms a cylinder extending in the Y direction. With the contact thermometer 1 assembled, the second support pin 12 is inserted into the pin insertion hole formed at the other end of the head 10 in the X direction with no play. It is inserted into the second supporting hole 22 of 20 with play. The second support pin 12 is arranged on the distal side of the first support pin 11 in the Z direction, and the contact plate 20 does not come into contact with the object to be measured. It is in contact with the far end of the contact plate 20 .

In the present disclosure, the state without play means that there is no gap or looseness between the pin and the hole, and the pin inserted into the hole or the hole into which the pin is inserted is a plane orthogonal to the axial direction of the pin. Shows no motion on top. The state with no play includes the state where there is no gap or slack between the pin and the hole structurally, but there may be some gap within the margin of error when the pin is inserted into the hole. It also includes the state with looseness. A state with play means that there is a gap or looseness between the pin and the hole, and the pin inserted into the hole, or the hole into which the pin is inserted, is in contact with the pin and the hole on a plane orthogonal to the axial direction of the pin. indicates a state in which it is possible to move within a range in which it does not touch.

The projecting portion 13 is formed at one end of the tip center block 10a in the X direction, and protrudes from the end to the tip more than other parts of the tip center block 10a. A pin insertion hole into which the first support pin 11 is inserted is formed on the distal end side of the projecting portion 13 and on the Z-direction distal end side of the second support pin 12 .

The storage part 14 is formed in the central part of the tip center block 10a in the X direction, and is formed of a hole penetrating from the tip to the tip. In the housing portion 14, a biasing support portion 15 and an element support portion 16 are arranged. A portion including the biasing member 30 supported by the biasing support portion 15 and the temperature sensing portion 43 of the temperature detecting element 40 protrudes from the opening on the distal end side of the storage portion 14 , and extends from the opening on the distal end side to the element support portion 16 . Wires 41 and 42 of the supported temperature detection element 40 are led out.

The urging support 15 consists of four support pins extending in the Y direction. Two support pins of each biasing support 15 are arranged at each of the inner corners of the distal end side of the rounded rectangle of the biasing member 30 and each of the outer corners of the inwardly convex bend of the Ω-shape. two are placed in The biasing support portion 15 supports the biasing member 30 in a non-fixed manner to the head body 10 with the two ends of the biasing member 30 being free with four support pins.

The element support portion 16 is composed of a plurality of support pins extending in the Y direction and a short-circuit prevention member that prevents short-circuiting of the temperature detection element 40 . The element supporting portion 16 is not limited to the configuration of the present embodiment as long as it guides the temperature detecting element 40 to the support 50 and prevents the wire strands 41 and 42 of the temperature detecting element 40 from being short-circuited.

The tip side block 10b is arranged on the Y direction side of the tip center block 10a, and functions as a retainer for the first support pin 11 and the second support pin 12 inserted into the respective pin insertion holes of the tip center block 10a. do. When the contact plate 20 is pressed against the object to be measured and is greatly tilted in the Z direction, the tip side surface of the tip side block 10b comes into surface contact with the object to be measured, and the contact plate 20, the biasing member 30, and the temperature sensor 10b are brought into surface contact with the object to be measured. It functions to protect the sensing element 40 . The tip of the tip side block 10b is located on the tip side of the portion other than the projecting portion 13 of the tip center block 10a. is formed. The tip surface of the tip side block 10 b may be arranged on the tip side of the tip of the projecting portion 13 .

The first support hole 21 of the contact plate 20 has a substantially circular shape when viewed in the Y direction, and the first support pin 11 is inserted without play. The first support hole 21 is formed by bending one end of the contact plate main body 23 in the X direction toward the terminal side and joining it to the surface of the contact plate main body 23 opposite to the surface in contact with the object to be measured. The first support hole 21 is always in contact with the surface of the contact plate 20 opposite to the surface in contact with the object to be measured. One end of the folded contact plate main body 23 is joined to the opposite surface at a position spaced apart from the first support hole 21 .

The second support hole 22 is larger than the second support pin 12, has a length in the Z direction equal to or greater than the separation distance in the Z direction between the first support pin 11 and the second support pin 12, and has a length in the X direction. The width is wider than the diameter of the second support pin 12 . The second supporting hole 22 is arranged such that the second supporting pin 12 is located at the far end from the contact plate 20 of the Z-direction ends of the second supporting hole 22 while the contact plate 20 is not in contact with the object to be measured. contact is desirable. The second support hole 22 preferably has a shape in which the width in the X direction gradually narrows from the end in the Z direction toward the tip. A second support hole 22 is formed in a support member 24 .

As illustrated in FIG. 3, the supporting member 24 has a U-shape when viewed in the X direction, and includes a pair of supporting pieces 26 facing each other in the Y direction and a connecting piece 27 connecting the supporting pieces 26 together. consists of A second support hole 22 is formed in each of the pair of support pieces 26 . The supporting member 24 is joined to the surface of the contact plate main body 23 opposite to the surface of the contact plate main body 23 in which the connecting piece 27 is in contact with the object to be measured.

As illustrated in FIG. 2, in the assembled contact thermometer 1, the center point P1 of the portion of the biasing member 30 that makes surface contact with the contact plate 20 is the state where the head 10 is not tilted with respect to the support 50. , and is arranged on the axis in the Z direction passing through the center of the connecting rod 60 . The shape of the biasing member 30 as viewed in the Y direction is symmetrical about the axis in the Z direction. The shape of the portion of the temperature detecting element 40 along the biasing member 30 is symmetrical about the axis in the Z direction. The temperature sensing portion 43 of the temperature sensing element 40 is arranged on the side of the second support pin 12 from the center point P1. The distance between the first support pin 11 and the center point P1 in the X direction is longer than the distance between the second support pin 12 and the center point P1, and the midpoint between the first support pin 11 and the second support pin 12 P2 is arranged closer to the first support pin 11 than the center point P1. The contact-type thermometer 1 has an intermediate point P2, a central point P1, and a temperature sensing portion 43 arranged in order from one end to the other end in the X direction.

The contact plate 20 is attached to the tip of the tip side block 10b in a state where the contact plate 20 is not in contact with the object to be measured and the second support pin 12 is in contact with the end of the second support hole 22 on the Z-direction end side. protrude from The contact plate 20 is biased by the biasing member 30 from the distal end in the Z direction to the distal end in the above-described state, and the surface in contact with the object to be measured forms a convex curved surface toward the distal end in the Z direction.

As illustrated in FIG. 4, when measuring the temperature of the measurement object 2 moving in the X direction with the contact thermometer 1, the measurer holds the handle of the support 50 and touches the measurement object 2 to the contact plate 20. pressed against. Note that the measurement object 2 is a sheet-like object that moves from the right side to the left side in the X direction in the drawing. The contact thermometer 1 is used so that the first support pin 11 is arranged on the right side in the X direction in the figure and the second support pin 12 is arranged on the left side in the X direction.

In the contact thermometer 1, when the contact plate 20 supported swingably by the head 10 is pressed against the object 2 to be measured, the contact plate 20 rotates with one end in the X direction as an axis and the other end in the Z direction. Move to the end of the direction. In addition, the contact plate 20 is biased toward the leading end in the Z direction by the biasing member 30 . Therefore, the contact plate 20 of the contact thermometer 1 is in surface contact with the measurement object 2 at the length L1, and the temperature sensing part 43 of the temperature detection element 40 is positioned at the center of the surface contact portion. The length L1 is preferably 20 times or more the thickness of the temperature detection element 40 in the Z direction. As described above, according to the contact thermometer 1, when the temperature of the measurement object 2 is measured, heat is sufficiently transmitted from the measurement object 2 to the temperature detection element 40 via the contact plate 20, and the temperature detection element 40 is sufficiently soaked. Thereby, the temperature of the measuring object 2 can be measured with high accuracy.

The contact plate 20 before being assembled to the head body 10 has a shape in which the contact plate main body 23 has a flat portion having a length L1. When the contact plate 20 is assembled to the head body 10, the surface of the contact plate 20, which is in contact with the object to be measured by the biasing member 30 as shown in FIG. It is a structure in which the part of length L1 is flattened by being pressed and returns to its original shape.

In the contact thermometer 1, the support structure of the contact plate 20 is a rotating end at one end and a free end at the other end. It is possible to reduce the contact pressure when the contact plate 20 is brought into contact with the object 2 to be measured. Therefore, according to the contact thermometer 1 , even if the contact plate 20 is pressed against the measurement object 2 , the frictional force generated between the contact plate 20 and the measurement object 2 can be kept low. This is advantageous for suppressing the generation of frictional heat, and the temperature of the measurement object 2 can be measured with high accuracy.

In the contact-type thermometer 1, the distance between the first support pin 11 and the contact plate 20 is close, so that when measuring the temperature of the measurement object 2, the first support pin 11 acts on the contact plate 20 as a fulcrum. It is possible to suppress the moment of the force that Therefore, according to the contact thermometer 1, even if an unexpected force is applied when the contact plate 20 is brought into contact with the object 2 to be measured, deformation of the one end of the contact plate 20 can be suppressed. This is advantageous for improving the durability of the contact-type thermometer 1, and the replacement frequency of the contact-type thermometer 1 can be reduced.

In the contact-type thermometer 1, the positions of the first support pin 11 and the second support pin 12 in the Z direction may be the same. In that case, the distance between the first support pin 11 and the contact plate 20 increases, which may increase the moment acting on the contact plate 20 with the first support pin 11 as the fulcrum. In addition, the second support hole 22 is elongated toward the end in the Z direction, and in a state where the contact plate 20 is not in contact with the object 2 to be measured, the contact plate 20 between the first support hole 21 and the second support hole 22 is in a more oblique state than in the embodiment. Therefore, the shape of the biasing member 30 viewed in the Y direction is asymmetric with respect to the axis in the Z direction, and the positions of the first support pin 11 and the second support pin 12 in the Z direction are the same. If the contact plate 20 is pressed against the measurement object 2 in this configuration, the biasing force acting on the contact plate 20 from the biasing member 30 may become uneven. Therefore, in the contact thermometer 1, the contact plate 20 is not in contact with the measurement object 2, and the first support pin 11 is in contact with the surface of the contact plate 20 opposite to the surface in contact with the measurement object 2. It is desirable that the support pin 12 contacts the end of the second support hole 22 in the Z direction that is farther from the contact plate 20 . This makes the distance between the first support pin 11 and the contact plate 20 as close as possible, which is advantageous for suppressing the moment acting on the contact plate 20 with the first support pin 11 as a fulcrum. In addition, the shape of the biasing member 30 as viewed in the Y direction becomes axisymmetrical, and the biasing force acting on the contact plate 20 becomes uniform.

In the contact thermometer 1, the temperature sensing portion 43 of the temperature detection element 40 may be arranged at the center point P1 of the biasing member 30, and the midpoint P2 of the first support pin 11 and the second support pin 12 in the X direction may be It may be arranged at the center point P<b>1 of the biasing member 30 . In this case, the temperature sensing part 43 is arranged at a position off the center of the part of the contact plate 20 that is in surface contact with the object 2 to be measured, which may reduce the measurement accuracy. In addition, the length of the contact plate 20 in surface contact with the measurement object 2 in the X direction may be shortened, and the contact pressure may be increased. Therefore, in the contact thermometer 1, the center point P1 of the portion of the biasing member 30 in surface contact in the X direction is closer to the second support pin 12 than the midpoint P2 between the first support pin 11 and the second support pin 12. It is desirable that the temperature sensing portion 43 of the temperature sensing element 40 be located closer to the second support pin 12 than the center point P1. This makes it possible to secure the length of the surface of the contact plate 20 that is in contact with the object 2 to be measured, which is advantageous for keeping the contact pressure low. Also, the temperature sensing part 43 is arranged at the center of the part where the contact plate 20 comes into surface contact with the object 2 to be measured, which is advantageous for improving the measurement accuracy.

In the contact thermometer 1 , the first support hole 21 of the contact plate 20 may be formed in a member separate from the contact plate main body 23 like the second support hole 22 . In this case, there is a possibility that the connection between the contact plate main body 23 and the separate member supported by the first support pin 11 on which the force in the X direction is applied to the contact plate 20 from the measurement object 2 will be released. Therefore, in the contact-type thermometer 1, the first support hole 21 of the contact plate 20 is folded back at one end of the contact plate main body 23 in the X direction, and the surface of the contact plate main body 23 opposite to the surface in contact with the measurement object 2 is formed. It is desirable to be joined to. As a result, even if a force in the X direction is applied to the contact plate 20 from the measurement object 2, only the folded portion of the contact plate main body 23 is pulled, which is advantageous for improving durability.

In the contact thermometer 1 , it is preferable that the joint portion of one end of the folded contact plate main body 23 is separated from the first support hole 21 as long as possible. When a force acts on the contact plate 20 from the right side to the left side in the X direction, the action of the force acting on one end of the folded contact plate main body 23 in the Z direction decreases as the separation distance increases. The action of the applied force increases. Therefore, the joining becomes difficult to be released, which is advantageous for improving the durability.

In the contact thermometer 1, it is preferable that the biasing member 30 is unfixedly supported by the head body 10 in a free state at both ends thereof by the biasing support portion 15. As shown in FIG. With this configuration, when the contact plate 20 is pressed against the object to be measured, stress is not applied even if the contact plate 20 becomes an inclined surface because the biasing member 30 is supported without being fixed. elastically deformable. As a result, the elastic force urges the contact plate 20 toward the object to be measured, thereby maintaining surface contact between the contact plate 20 and the object to be measured, which is advantageous for improving durability and measurement accuracy.

As illustrated in FIG. 2, the support structure for the head 10 on the distal end side is a structure for supporting the head 10 on the support 50 so as to be able to swing in the X direction around the connecting rod 60 . The support structure for the head 10 is such that the head 10 is supported on the support 50 so as to be swingable in the Y direction by the amount of play between the support connecting hole 55 of the support 50 and the connecting rod 60. be.

As illustrated in FIG. 5, the end block 10c has a support insertion hole 17, a communication hole 18 and two head-body connection holes 19. As shown in FIG. End block 10c has screw holes not shown.

The support insertion hole 17 is arranged in the center of the terminal end of the end block 10c and is formed by hollowing out from the terminal end to the communicating hole 18 toward the tip. The support insertion hole 17 is an elongated hole whose longitudinal direction is oriented in the X direction when viewed in the Z direction. The X-direction length of the support insertion hole 17 is longer than the X-direction length of the connecting body 51 of the support 50 . The length of the support insertion hole 17 in the X direction is such that the head 10 can be tilted in the range of 4° to 20° from the Z direction, which is the axial direction of the support 50, toward the X direction. is desirable. The Y-direction width of the support member insertion hole 17 is longer than the Y-direction width of the connecting member 51 of the support member 50 . The Y width of the support insertion hole 17 is preferably a width that allows the head 10 to tilt in the range of 2° to 10° from the Z direction, which is the axial direction of the support 50, toward the Y direction. .

The communication hole 18 extends in the Z direction and communicates the storage portion 14 and the support member insertion hole 17 . The communication hole 18 is not particularly limited as long as the wires 41 and 42 of the temperature detection element 40 pass through it. For example, two communication holes 18 may be arranged and the wires 41 and 42 may be passed through each.

Each of the two head-body connection holes 19 extends in the Y direction and penetrates the end block 10c, forming a circular shape when viewed in the Y direction. The two head body connection holes 19 are arranged to face each other in the Y direction via the support insertion hole 17 . The diameter of the two head-body connecting holes 19 is substantially the same as the diameter of the connecting rod 60, and the connecting rod 60 is inserted into the two head-body connecting holes 19 without play.

The support 50 comprises a connector 51, a support body 52, and a handle (not shown). Handle is fixed. A signal line (not shown) is led out from the end of the support 50 .

The connector 51 has an insertion portion 53 , a main body insertion hole 54 , a support connection hole 55 , a wire insertion hole 56 , and a restricting portion 57 . The coupling body 51 is formed by cutting a cylinder to form an insertion portion 53 on the distal end side and a body insertion hole 54 on the distal end.

The insertion portion 53 has a chamfered corner on the tip side, and has a hexagonal shape with chamfered corners on the tip side of a rectangle when viewed in the Y direction. By chamfering the corners on the distal end side of the insertion portion 53, when the head body 10 swings about the connecting rod 60, collision with the bottom of the support insertion hole 17 is avoided, and the swing angle is reduced. growing. The body insertion hole 54 is recessed from the distal end of the connector 51 toward the tip, into which the tip of the support body 52 is inserted and connected and fixed to the support body 52 by screwing.

The support connection hole 55 passes through the insertion portion 53 in the Y direction, and communicates with the two head connection holes 19 when the insertion portion 53 is inserted into the support insertion hole 17 . The hole diameter of the supporting member connecting hole 55 is longer than the diameter of the connecting rod 60, and the connecting rod 60 is inserted with play. It is desirable that the hole diameter of the supporting body connection hole 55 is such that the head body 10 can be tilted in the range of 2° to 10° toward the Y direction from the Z direction, which is the axial direction of the supporting body 50. .

The wire insertion hole 56 passes through the insertion portion 53 in the Z direction and communicates with the main body insertion hole 54 . A strand insertion hole 56 is formed for each of the strands 41 and 42, and a support connecting hole 55 is formed between the strand insertion holes 56. As shown in FIG. The restricting portion 57 has a circular outer periphery when viewed in the Z direction. When the head 10 swings in the X direction or the Y direction, the limiting portion 57 contacts the distal end surface of the terminal block 10c. Swinging of the head body 10 is restricted by contacting the distal end surface of the restricting portion 57 with the distal end surface of the terminal block 10c.

The support body 52 forms a cylinder. The support body 52 has a signal line in which the element wires 41 and 42 of the temperature detection element 40 are coated with a coating material.

As illustrated in FIG. 6, when measuring the temperature of the measurement object 2 moving in the X direction with the contact-type thermometer 1, the measurer holds the handle of the support 50 and touches the measurement object 2 to the contact plate 20. pressed against.

Since the head 10 of the contact thermometer 1 is supported by the support 50 so as to be swingable in the X and Y directions, even if the support 50 is tilted with respect to the Z direction, The head 10 tilts with respect to the support 50 due to its own weight, and the contact plate 20 comes into surface contact with the object 2 to be measured. This is advantageous for avoiding uneven contact between the contact plate 20 and the object 2 to be measured, and the contact plate 20 can sufficiently come into surface contact with the object 2 to be measured. As a result, deterioration in measurement accuracy can be avoided.

In the state illustrated in FIG. 4, when a force in the X direction or a force in the Y direction acts on the contact plate 20, the contact plate 20 cannot parry those forces. Therefore, a strong force is applied to the contact portion between the contact plate 20 and the object 2 to be measured, and the contact plate 20 may be distorted in a convex arc from the Z-direction leading end to the trailing end in an attempt to release the force. There is In the present disclosure, the force in the X direction and the force in the Y direction that act on the contact plate 20 are either the force that presses the contact thermometer 1 of the measurer against the measurement object 2 or the force that moves the measurement object 2. are exemplified.

As exemplified in FIG. 6 , the contact thermometer 1 moves such that the head 10 tilts with respect to the support 50 around the connecting rod 60 when a force in the X direction acts on the contact plate 20 . Therefore, the force acting on the contact plate 20 can be parried. As a result, a strong force is applied to the contact portion between the one end portion of the contact plate 20 and the object to be measured 2 , and a decrease in measurement accuracy due to distortion of the contact plate 20 can be avoided.

FIG. 6 illustrates a case where force acts on the contact plate 20 from left to right in the X direction. In this case, the head 10 tilts to the right in the X direction with respect to the support 50 so as to deflect the force acting on the contact plate 20 . Although not shown, when a force acts on the contact plate 20 from the right side to the left side in the X direction, the head 10 tilts leftward in the X direction with respect to the support 50 so as to parry the force. Similarly, when a force acts on the contact plate 20 in the Y direction, the head 10 tilts in the Y direction with respect to the support 50 so as to parry the force.

Although the embodiment of the present disclosure has been described above, the contact thermometer 1 of the present disclosure is not limited to a specific embodiment, and various modifications and changes are possible within the scope of the gist of the present disclosure. be.

The contact thermometer 1 is not limited to having two support structures, ie, a structure for supporting the contact plate 20 on the distal end side to the head body 10 and a structure for supporting the head body 10 on the distal end side to the support member 50 . Of the two support structures, the contact thermometer 1 may have only a structure that supports the tip-side contact plate 20 on the head body 10 .

Some of the four blocks of the head body 10 may be integrally constructed. For example, it may be composed of one block in which two tip side blocks 10b and an end block 10c are integrated. Further, the head body 10 is not limited to four blocks. If the first support pin 11 and the second support pin 12 do not come off from the pin insertion holes of the tip center block 10a, there is no tip side block 10b, It may consist of only the tip central block 10a and the end block 10c. Even if the first support pin 11 and the second support pin 12 do not come out of the pin insertion hole of the tip center block 10a, the tip side block 10b is connected to the contact plate 20, the biasing member 30, and the temperature sensor. It may be provided for the purpose of protecting the sensing element 40 .

The contact plate 20 is not limited to an L shape when viewed in the Y direction, and the bent portion 25 may not be formed at the other end in the X direction. By forming the bent portion 25 on the other end of the contact plate 20, when the contact plate 20 is pressed against the measurement object 2, the other end of the contact plate 20 is arranged on the right side in FIG. , and when one end is arranged on the left side in the drawing, the bent portion 25 avoids catching with the measurement object 2 . In addition, since the bent portion 25 is formed, the direction in which the contact-type thermometer 1 is used can be confirmed, which is advantageous in avoiding the use of the contact-type thermometer 1 in the wrong direction.

The urging member 30 is not limited to the configuration of the embodiment as long as it has a configuration that elastically urges the contact plate 20 toward the distal end side. For example, biasing member 30 may comprise a plurality of springs. A temperature sensing resistor may be used instead of the thermocouple as the temperature sensing element 40 . Also, the temperature detection element 40 may be arranged on the surface of the biasing member 30 that is in surface contact with the contact plate 20 or the surface of the contact plate 20 that is opposite to the surface that is in contact with the measurement object 2 .

The connecting rod 60 may be inserted into the supporting member connecting hole 55 of the supporting member 50 with play. As a result, the head 10 can also be swung in the Y direction with respect to the support 50, which is advantageous for avoiding partial contact of the contact plate 20. FIG. In this case, the Y-direction width of the support insertion hole 17 of the terminal block 10c must be larger than the Y-direction width of the insertion portion 53 of the support 50 .

1 Contact Thermometer 10 Head 11 First Support Pin 12 Second Support Pin 20 Contact Plate 21 First Support Hole 22 Second Support Hole 30 Biasing Member 40 Temperature Detection Element 50 Support 60 Connecting Rod

Claims (6)

A contact plate that protrudes from the tip of the head and is in direct surface contact with the object to be measured, an urging member that elastically urges the contact plate toward the object to be measured, and the contact plate that contacts the object to be measured. A contact thermometer comprising a temperature detecting element arranged on the opposite side of the surface to be measured and converting the temperature of the object to be measured into an electrical signal,
The head body has a first support pin and a second support pin spaced apart from each other in the longitudinal direction of the contact plate and extending in the width direction of the contact plate, the first support pin being greater than the second support pin. It is arranged on the tip side of the head body and is closer to the surface opposite to the contact surface than the second support pin,
The contact plate has a first supporting hole formed at one end in its longitudinal direction and into which the first support pin is inserted without play, and a first support hole formed at the other end for receiving the first support pin. a second support hole at least longer in the plate thickness direction of the contact plate than the support hole and into which the second support pin is inserted with play; and is a rotating end and the other end is a free end. Contact thermometer. With the contact plate not in contact with the object to be measured, the first support pin is in contact with the opposite surface, and the second support pin is located at one end of the second support hole in the plate thickness direction. 2. The contact thermometer according to claim 1, wherein the contact plate is in contact with an end portion remote from the contact plate. The biasing member is configured to make surface contact with a surface opposite to the contact surface,
The center of the surface contacting portion of the biasing member in the longitudinal direction is arranged closer to the second support pin than the midpoint between the first support pin and the second support pin, and the temperature sensing element of the temperature detection element The contact thermometer according to claim 1 or 2, wherein the portion is arranged closer to the second support pin than the center. 4. The contact thermometer according to any one of claims 1 to 3, wherein said first support hole is formed by folding back one longitudinal end of said contact plate and joining it to said opposite surface. a support whose tip is inserted into a support insertion hole formed at the distal end of the head; a plurality of connecting holes communicating with each other in the width direction of the contact plate in a state in which the tip end of the support is inserted into the insertion hole; and a connecting rod inserted into the connecting holes. The contact thermometer according to any one of claims 1 to 4, wherein the body is supported by the support so as to be swingable in the longitudinal direction of the contact plate about the connecting rod. In the width direction of the contact plate, the width of the support insertion hole is wider than the width of the tip of the support,
The hole diameter of the connecting hole formed in the support is longer than the diameter of the connecting rod, and the connecting rod is inserted into the connecting hole formed in the head without play, The head body is inserted into the connecting hole formed in the support with some play, and the contact is made by the amount of play between the connecting hole formed in the support and the connecting rod. 6. The contact thermometer according to claim 5, supported by said support so as to be swingable in the width direction of the plate.

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