JP2003227760A - Contact-type temperature sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact-type temperature sensor with a simple structure composed of a small number of parts and made up thinner, in which a contact plate can be in planar contact with a surface of an object to be measured by pressing two or more pressing sections on both sides of a temperature sensitive section thereon and in which the force for pressing the contact plate can be designed and adjusted easily. <P>SOLUTION: The contact-type temperature sensor 10 having the contact plate 12 which is in contact with the object to be measured 20, the temperature sensitive section 13 to which heat from the contact plate 12 is transmitted, and a pressing means 14 which presses the contact plate 12 onto the object to be measured 20, is composed so that the temperature sensitive section 13 is arranged behind the contact plate 12, and a contact plate supporting section 12s disposed near both edges of the contact plate 12 is held by a fixing/ supporting section 11, and the pressing means 14 is made up of a leaf spring 14, the one edge of which presses the contact plate 12, and the other edge is held by the fixing/supporting section 11, and the contact plate 12 is pressed by at least two pressing sections C by which the temperature sensitive section 13 is sandwiched. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact type temperature sensor for measuring the temperature by directly contacting a moving material or product in a manufacturing process of aluminum foil, glass or various sheet-like materials. Is. More specifically, it relates to a structure for pressing a contact plate of a contact temperature sensor.

[0002]

2. Description of the Related Art As a contact type temperature sensor for directly measuring the temperature by directly contacting the surface of an object to be measured,
Japanese Utility Model Laid-Open No. 57-201940 and Japanese Patent Laid-Open No. 54-628.
No. 77, Japanese Utility Model Publication No. 58-28195 and the like are proposed, and for measuring the surface temperature of a moving body, Japanese Patent Publication No. 54-18
580, Japanese Patent No. 2979264, Japanese Patent Laid-Open No. 7-1
Japanese Patent Laid-Open No. 98504 and Japanese Patent Laid-Open No. 10-318864 are proposed.

In these contact-type temperature sensors, the temperature-sensing portion of the thermoelectric element is in contact with the temperature-measuring body via the contact plate.
By using the elastic deformation force of the contact plate itself, the elastic contact plate type that presses the contact plate against the temperature-measuring object and the contact plate and the elastic body that generates pressing force are combined to There is an elastic body pressing type of pressing with an elastic body.

In this elastic contact plate type, in Japanese Utility Model Laid-Open No. 57-201140, the contact plate is formed by a U-shaped elastic frame body, and the central portion of the contact plate is abutted, and in addition, in Japanese Utility Model Publication No. 58-58. In Japanese Patent No. 28195, a tip of a hollow cylinder is capped with a dish-shaped contact plate, and the central portion of the dish is in contact.

Further, the moving surface is also targeted.
In Japanese Patent Publication No. 98504, a contact plate, in which a contact portion is arranged at the center and deformation portions whose elasticity is lower than that of the contact portion is provided on both sides of the contact plate, is attached to a casing by an attachment portion outside the deformation portion,
The pressing force is adjusted by adjusting the elastic force of the deformed portion.

In the elastic body pressing type, in Japanese Utility Model Laid-Open No. 57-201140, both ends of the contact plate are held by leaf springs, and the center is pressed by push pins biased by a coil spring. Further, in Japanese Examined Patent Publication No. 54-18580, a thermocouple fixing portion is provided at the center of a substantially U-shaped contact plate in which both legs are attached so as to be able to move up and down, and symmetrical positions on both sides thereof are elastically supported by a coil spring or rubber. It is pressed by the body.

Further, in Japanese Patent No. 2979264, an auxiliary plate having a lever portion is fixed near both ends of the contact plate, and a bending moment is generated at both ends of the contact plate by the elastic force of the auxiliary plate. The central part of the contact plate fixed to the back surface is bulged in a convex shape.
In Japanese Patent No. 318864, both ends of the contact plate are movably held by the support bars being loosely fitted in the guide holes of the long hole, and the central portion of the contact plate is pressed by the annular elastic body.

[0008]

However, when the elastic contact plate type utilizing the elastic deformation force of the contact plate itself is used for measuring the moving surface, the friction with the moving surface of the temperature-measuring object is small, and , While exhibiting excellent heat transferability and low heat capacity, it can exert optimal pressing force,
Moreover, since it is necessary to satisfy the requirement to maintain an appropriate supporting and fixing strength against the pressing force and the frictional force received from the moving surface with a single contact plate, it may be extremely difficult to design and manufacture in practice. There is a problem that it will occur.

In particular, in order to meet the required size, heat resistant temperature, pressing force, and other specifications, many requirements must be solved at the same time with the shape and fixing method of one contact plate. However, the manufacturing cost is increased because the manufacturing precision is required to be high.

In the elastic body pressing type, the contact plate is prevented from floating above the moving surface of the temperature-measured body.
Since the auxiliary plate or annular elastic plate with a special shape is used, the optimum material for the contact plate can be selected and the pressing force can be optimized. Therefore, excellent temperature measurement accuracy can be obtained, and the contact characteristic and the pressure characteristic can be designed separately, which facilitates the design. However, on the other hand, there are problems that the number of parts is increased and high machining accuracy is required.

On the other hand, in the manufacturing process of an aluminum thin plate or aluminum foil, in order to manufacture a high quality aluminum thin plate or aluminum foil having a constant thickness and no defects such as pinholes, the temperature of the moving aluminum plate or We strictly control the moving speed, etc., and generally arrange a large temperature sensor,
It is difficult to secure a space for insertion. Therefore, a sensor that has high measurement accuracy and excellent responsiveness and is small and thin has been required.

In the conventional elastic pressing type contact type temperature sensor, a space for arranging the supporting portion of the contact plate and the pressing member is required behind the contact plate, and it is structurally difficult to make it thin. In many cases, there is a problem.

At the temperature measuring site, it is often necessary to adjust the pressing force of the contact type temperature sensor due to changes in the condition of the object to be measured or changes in the object to be measured. In both the elastic contact plate type and the elastic body pressing type, the temperature sensor has a problem that the pressing force cannot be easily adjusted after assembly.

The present invention has been made to solve the above problems, and an object thereof is to press a contact plate against the surface of a temperature-measuring body with two or more pressing parts on both sides of the temperature-sensing part. Surface contact with each other, the pressing force of the contact plate can be easily designed and adjusted, and the structure is relatively simple and the number of parts is small.
It is to provide a contact-type temperature sensor that can be formed thin.

[0015]

The contact type temperature sensor according to the present invention is configured as follows in order to achieve the above object.

1) Contact-type temperature having a contact plate in contact with the temperature-measuring body, a temperature-sensing portion to which heat is transferred from the contact-plate, and a pressing means for pressing the contact plate against the temperature-measuring body. In the meter, the temperature sensing part is arranged behind the contact plate, and the contact plate supporting parts arranged near both ends of the contact plate are held by the fixed supporting part, and the pressing means is contacted at one end side by the contact part. The plate is pressed and the other end side is formed by a plate spring held by a fixed support part, and the contact plate is pressed by at least two pressing parts sandwiching the temperature sensing part.

The holding of the contact plate includes fixed support, rotatable support by pivotal support / support of the support shaft, and movable support within a predetermined range by loosely fitting the support bar. In addition, in the pressing portion, the leaf spring and the contact plate are brought into contact with each other in a pressed state without being joined, and the leaf spring and the contact plate are configured to slide.

Further, when the surface of the temperature-measured body with which the contact plate contacts is flat, it is preferable to press at two points, and when the surface is curved like a roller, it is 3
It is preferable to press at a point or more.

According to this structure, since the contact plate presses two or more points on both sides of the temperature sensing portion, the portion of the contact plate having the temperature sensing portion is subjected to the temperature sensing according to the surface shape of the temperature sensing object. It can contact the body accurately. Therefore, heat can be smoothly transferred to the temperature sensing unit, and accurate temperature measurement can be performed.

When a leaf spring is used, the thickness of the sensor main body can be made thinner than when the contact plate is pressed by a coiled spring, and the sensor plate can be easily joined to the contact plate, and the pressing force and spring constant can be set and Adjustment is also easy. Particularly, since the pressing force and the spring constant can be reduced while maintaining the strength of the leaf spring, the frictional force between the contact surface and the moving surface is reduced, and the measurement error due to the frictional heat generated is reduced. In addition, the moving surface of the temperature-measured body is less likely to be damaged.

When the pressing force is generated by the leaf spring, the spring force of the leaf spring is applied to the pressing portion by setting the cantilever state in which the holding of the leaf spring to the fixed support portion is fixed and held. Alternatively, the leaf spring may be held on the fixed support portion by rotatably supporting and the space between the pressing portion and the holding portion may be pressed to displace the pressure adjusting portion at an intermediate position of the leaf spring. The spring force of the leaf spring may be applied to the pressing portion.

The pressing force of the leaf spring against the contact plate can be easily set by the amount of displacement given to the pressure adjusting portion at the time of assembling the sensor, but it can also be configured so that it can be adjusted even during use after assembling.

2) In the above contact type temperature sensor, the pressing amount is adjusted by adjusting the displacement amount of the pressure adjusting part provided between the pressing part of the leaf spring and the part held by the fixed support part. It is configured to adjust the pressing force in the section.

The amount of displacement of the pressure adjusting portion can be easily adjusted with an adjusting screw. When the adjusting screw has a space for arrangement, the adjusting screw is provided for each leaf spring. If there is not enough room, the adjusting plate is pressed between the adjusting screw and the pressure adjusting portion with one adjusting screw, and a single or a plurality of leaf springs are pressed by a plurality of parts of the adjusting plate. May be pressed, and the pressing force of the plurality of pressing portions may be adjusted simultaneously with one adjusting screw.

3) In the above contact type temperature sensor, the pressing section and the contact plate supporting section are arranged on both sides of the temperature sensing section.

Regarding the arrangement of the pressing portion, the directions of the temperature-sensitive portion and the pressing portion and the direction of the temperature-sensitive portion and the contact plate supporting portion have an angle, for example, they are orthogonal or have an angle of 45 degrees. However, if the direction of the temperature sensing part and the pressing part and the direction of the temperature sensing part and the contact plate support part are the same, when the contact plate contacts the moving surface, this moving surface By making the moving direction of the same as the direction of the temperature sensitive part, the pressing part, and the contact plate support part, it is possible to arrange two or more pressing parts in the moving direction with the temperature sensitive part interposed therebetween. The contact plate can be in intimate contact with the moving surface in face-to-face contact.

Further, the contact plate can be pressed at a plurality of positions in accordance with the flat surface or curved surface of the temperature-measuring object by the pressing portions of two or more points in this direction.

Therefore, in the prior art, when a bending moment is generated at both ends to bulge the contact plate in a convex shape or the center of the contact plate is pressed by the annular elastic body, that is, the pressing force becomes large. Since the contact surface can be increased, the temperature can be measured more accurately than in the case where there is only one portion or the pressing force distribution cannot be freely selected.

Further, since several pressing portions can be distributed in a plane, the shape of the contact plate can be adapted not only to a roller or the like but also to a curved surface such as a spherical surface in two directions or another direction. Or by making it deformable,
The contact area can be increased.

4) In the above contact-type temperature sensor, the contact plate supporting portion is fixed to the fixed supporting portion so as to be movable within a predetermined range in a direction parallel to a surface of the contact plate contacting the temperature-measuring body. Configure to hold.

To movably hold within this predetermined range, for example, the contact plate supporting portion of the contact plate is formed into a rod shape,
This can be carried out by loosely fitting in a long hole formed in the fixed support portion.

According to this structure, even if a frictional force acts on the contact plate due to contact with the moving surface of the temperature-measuring body, the contact plate is movably held, so that the frictional force is applied to the contact plate. Since it balances with the power, the deformation of the contact plate is small. Therefore, it is possible to prevent the contact surface from being distorted in a wavy manner and rising from the moving surface of the temperature-measuring body.

5) In the above contact type temperature sensor, the leaf springs are arranged so as to intersect with each other in a side view, and the leaf spring presses the contact plate with a pressing portion prior to the temperature sensing portion. To configure.

Normally, the leaf springs are arranged so as to have an inverted V shape in a side view, but the leaf springs may be arranged so as to intersect each other in a side view as in this configuration.

According to this structure, the length of the leaf spring can be increased without extending the length of the contact plate or the length of the fixed support portion, and the pressing force and spring constant can be maintained while maintaining the thickness and strength of the leaf spring. Can be made smaller. Therefore, this contact type temperature sensor can be made compact.

Further, according to these structures, the parts of the pressing means for pressing the contact plate are only the holding portion and the adjusting portion of the leaf spring, and this holding portion can be formed by the concave portion of the fixed supporting portion,
Since the adjusting portion can be easily constructed by an adjusting screw or the like that comes into contact with the leaf spring, the number of parts is small, and the design of the pressing means and the setting and adjustment of the pressing force are also easy.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a contact type temperature sensor according to an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment] As shown in FIGS. 1 and 2, a contact-type temperature sensor 10 according to a first embodiment of the present invention is a fixed type constituting a main body of the contact thermometer sensor 10. The support portion 11, the contact plate 12, the temperature sensing portion 13 of the thermoelectric element arranged behind the center of the contact plate 12, and the contact plate 12
It is constituted by having leaf springs 14 and 14 for pressing the temperature measurement target 20.

This fixed support portion 11 is a portion of a holder which constitutes the main body of the contact type temperature sensor 10. In this example, as shown in FIG. 3, the first side portion 11A and the second side portion 11 are provided.
It is configured by B and the lid portion 11C. The fixed support portion 11 is selected in consideration of the measurement temperature range and the like, and a ceramic molded product is used for high temperatures, but a synthetic resin molded product is used for 200 ° C. or lower.

The contact plate 12 is formed of a metal plate such as a stainless plate in a band shape, and smoothly transfers heat from the temperature-measured body 20 and to the temperature-sensing section 13 arranged behind the center. It is made of a material with high thermal conductivity as is done. In addition, the pressing portion C is pressed to move the moving surface 20f of the temperature-measured body 20.
Since it is pressed against, it is formed so as not to bend at the pressing portion C and to have elasticity and strength to the extent that it does not buckle and deform even if frictional force is received from the moving surface 20f.

Regarding the holding of the contact plate 12,
Contact plate support part (support bar) that protrudes in a rod shape near both ends 1
2s is provided, and this contact plate support portion 12s is fixed to the support portion 11
1 is loosely fitted in a guide hole 11h formed in the elongated hole, and by this loose fitting, the guide hole 11h can be moved, that is, the moving direction MN of the temperature-measured body 20 shown in FIG.
With respect to, a movable state is maintained within a predetermined range R.
The contact support portion 12s may be provided by spot welding a support bar directly, but may be provided by spot welding by sandwiching the contact plate 12 from both sides with a plate material having a contact plate support (support bar) 12s. You can also

The temperature sensing portion 13 of the thermoelectric element disposed behind the center of the contact plate 12 is composed of a thermal contact of a thermocouple, a thermistor or the like, and is welded or bonded so as to efficiently receive heat transfer. Fixed to the contact plate 12, its lead wire 13w
Passes through the side of the leaf spring 14, enters the guide groove 11w of the fixed support portion 11 of the main body, and is guided from the contact-type temperature sensor 10 to a measurement unit (not shown). In this measuring unit, the output from the temperature sensing unit 13 is converted into temperature, and the temperature is displayed or output to the data processing device.

If the temperature sensing part 13 cannot be directly joined to the contact plate 12, a patch plate is prepared, and the temperature sensing part 13 is sandwiched between the patch plate and the contact plate 12, and the temperature sensing part 13 is sandwiched. The temperature sensitive portion 13 may be fixed to the contact plate 12 by joining the contact plate portions on both sides of the contact plate 12 to the contact plate 12 by welding, adhesion, or the like.

Further, the leaf spring 14 is, as shown in FIG.
A thin elastic metal plate such as a stainless steel plate or a spring steel plate is formed into an isosceles triangle having locking portions 14s spreading on both sides at the bottom portion in plan view. That is, the portion acting as a spring becomes an isosceles triangle, and the apex W of this isosceles triangle becomes one end side and is pressed by the pressing portion C of the contact plate 12,
The support shelf 11 of the fixed support 11 is provided by the locking portion 14s on the other end side.
held at s.

According to the configuration of the isosceles triangular leaf spring 14, the leaf spring 14 can have a relatively small spring constant with a simple shape. Further, the apex W of the isosceles triangle of the leaf spring 14 is brought into contact with the contact plate 12 in a pressed state, and the opposite side to the apex W is fixed by the fixing support portion 11, whereby the leaf spring 14 can be firmly held.

The leaf spring 14 is formed of two sheets, and is constituted so that the contact plate 12 is pressed by the two pressing portions C which are symmetrical with respect to the temperature sensitive portion 13. This leaf spring 14
The other end side is supported by the support shelf 11s, and the pressure adjusting section P between the support shelf 11s and the pressing section C is displaced by the adjusting screw 15, and the spring force generated by this displacement pushes the pressing section C. The pressure Fc is generated. The displacement amount of the pressure adjusting portion P is adjusted by rotating the adjusting screw 15, so that the pressing force Fc at the pressing portion C is adjusted.

Next, the assembly of the contact type temperature sensor 10 will be described. The contact type temperature sensor 10 has a contact plate 12, a temperature sensing portion 13, two leaf springs 14, as shown in FIG. 14 and a fixed support portion 11 including a first side portion 11A, a second side portion 11B, and a lid portion 11C. Further, the adjusting screw 15 is screwed into the adjusting hole 11a of the lid portion 11C and serves to adjust the pressing force Fc.

Then, as shown in FIG. 4, the leaf springs 14, 14 are brought into contact with the pressing portion C in a pressed state on the contact plate 12 to which the temperature sensitive portion 13 is joined. Next, as shown in FIG. 5, the joined body is attached to the first side portion 11A of the fixed support portion 11.
At this time, the contact plate supporting portion 12s of the contact plate 12 is attached to the guide hole 1
The plate spring 14 is held by inserting and loosely fitting it in 1h and disposing the locking portion 14s of the plate spring 14 on the support shelf 11s. Further, the lead wire 13w of the temperature sensing portion 13 is also housed in the guide groove 11w. This lead wire 13w is a guide groove 11w
It is connected via a temperature measuring unit (not shown).

Further, as shown in FIG. 6, the second side portion 11B is attached to the first side portion 11A, and the fixing screw 1
Join by 6. In addition, as shown in FIG.
1C is covered, it joins with the fixing screw 17, and it assembles to the contact type temperature sensor 10 as shown in FIG. And
The adjustment screw 15 is screwed in via the spring washer 15a to adjust the displacement of the pressure adjusting portion P of the leaf spring 14, and the contact plate 1 is caused by the spring force (restoring force) of the leaf spring 14 generated by this displacement.
The pressing force Fc at the pressing portion C of No. 2 is adjusted to complete the process.

According to the contact type temperature sensor 10 having the structure shown in FIGS. 1 to 8, the temperature sensing unit 1 is constituted by the two leaf springs 14.
The pressing portions C on both sides of 3 can be pressed, and the pressing force F
c also acts in the direction of pulling between the pressing portions C, and the pressing portions C
Since the contact plate 12 between the two is held in a planar shape, the contact plate 1
2 can be brought into planar contact with the moving surface 20f of the temperature-measured body 20.

Therefore, the contact plate 12 can be brought into close contact with the temperature-measured body 20, so that the heat of the temperature-measured body 20 is smoothly and quickly transferred from the moving surface 20f to the contact plate 12. Then, since this heat is transmitted to the temperature sensing portion 13, the contact plate 1
2 and the temperature sensing portion 13 quickly reach the same temperature as the moving surface 20f. Therefore, responsiveness is good and accurate temperature measurement can be performed.

Further, even after the assembly is completed, the adjustment screw 15 can be used to adjust the displacement of the pressure adjusting portion P of the leaf spring 14 to easily adjust the pressing force Fc for pressing the pressing portion C of the contact plate 12. The contact plate 12 can be brought into contact with the moving surface 20f of the temperature-measured body 20 with an optimum pressing force Fc.

Further, by appropriately selecting the material, the plate thickness, the planar shape, etc. of the leaf spring 14, not only the pressing force Fc,
The spring constant during pressing can also be selected. Especially as a plane shape,
Since not only a triangle but also a rectangle, a hollow triangle, a hollow rectangle, or the like can be adopted, the spring constant can be selected relatively easily.

[Second Embodiment] Next, a contact type temperature sensor according to a second embodiment will be described.

As shown in FIGS. 9 and 10, in the contact type temperature sensor 10A of the second embodiment, the leaf spring 14 is used.
A and 14B are arranged across the temperature sensing portion 13,
The contact plate 12 is configured to be pressed by the pressing portion C that is located ahead of the temperature sensing portion 13. That is, the leaf spring 14 in a side view.
A and 14B are arranged so as to intersect with each other.

In addition, in this structure, as shown in FIG. 10, an odd number of pressing portions C of the leaf spring 14A on one side are provided so that the contact plate 12 is not twisted by the pushing of the leaf springs 14A and 14B. The number of pressing portions C of the leaf spring 14B on the other side is plural (two), and they are pressed symmetrically in the width direction of the contact plate 12.

The adjusting member 18 is disposed between the adjusting screw 15 and the leaf spring 14B, and one adjusting screw 15 presses one pressure adjusting portion P'of the adjusting member 18,
It is configured to press the two pressure adjusting portions Pa and Pb of the leaf spring 14B. Both sides of the adjusting member 18 are fixed to the supporting portion 1.
1 is evenly guided by the side wall 11w of the pressure regulating portion Pa, P
It is configured to press b.

According to the construction in which the leaf springs 14A and 14B intersect in this side view, the lengths of the leaf springs 14A and 14B are compared with those of the contact type thermometer sensor 10, and the length is larger than that of the first embodiment. It can be taken long, and the pressing force and the spring constant can be weakened without extending the length of the contact plate 12 or the length of the fixed support portion 11 while maintaining the thickness and strength of the leaf springs 14A and 14B. . Therefore, the contact type temperature sensor 10A can be made compact.

Further, in the configurations of FIGS. 9 and 10,
The locking portion 14s of the leaf springs 14A and 14B is fixed to the fixed support portion 1
The first side portion 11A is inserted into and held by the step portion 11b provided on the side wall portion 11w. With this configuration, the width of the contact temperature sensor 10A can be reduced.

In this side view, the leaf springs 14A and 14B are
In the configuration in which the crosses intersect, the component force of the pressing force of the leaf springs 14A and 14B in the moving surface direction MN acts in the direction of compressing the contact plate 12, and the compressive force in the direction of lifting the contact plate 12 between the pressing portions C. Will work.

However, in this configuration, the angle formed by the contact plate 12 and the leaf springs 14A and 14B can be made small, so that this angle can be made small to make this compression force small and the pressing force itself. By making it smaller, this compression force can be made smaller.

Further, in the case of this construction, the leaf spring 14
To prevent the contact plate 12 from being twisted by the pressure of A and 14B, an odd number (1) of the pressure portions C of the leaf spring 14A on one side is generated.
It is preferable that a plurality of (two) pressing portions C of the leaf spring 14B on the other side are provided, and the pressing portions C are pressed symmetrically in the width direction of the contact plate 12.

[Other Embodiments] Next, other embodiments will be described.

FIG. 11 shows an example in which both ends of the contact plate 12D are rotatable but fixed in the moving surface direction MN.
In this case, the frictional force acting on the contact plate 12D is opposed by the leaf springs 14 and 14 and the contact plate 12D. This configuration is suitable when the frictional force is small such as the moving speed of the temperature-measured body 20 is low.

In FIG. 12, the support of the contact plate 12E is simplified, the contact support portion 12s 'remains flat, and the flat portion 12s' is arranged on the rotary shaft 11c provided on the fixed support portion 11 side, and is kept as it is. It is movably held on the rotating shaft 11c in the moving surface direction MN. Further, in order to reduce the vertical movement of the contact plate 12E, the rotary shaft 11c is attached to the contact plate 12E.
Two shafts may be provided so as to sandwich the upper and lower ends 12 s ′ of E.

According to the configuration of FIG. 12, the contact plate 12E
Has a contact plate supporting portion 12s' that remains in a strip shape, so that special processing such as providing a supporting bar is unnecessary, and the number of parts, man-hours, manufacturing cost, etc. can be reduced.

FIG. 13 shows a structure in which the adjusting screw 15 is omitted, and the leaf spring 1 is provided by the pressing portion 11p provided on the lid portion 11C '.
Press 4. This structure is suitable when fine adjustment of the pressing force Fc is unnecessary.

In FIG. 14, each of the leaf springs is doubled, and the upper leaf springs 19, 19 are pressed by the adjusting screw 15.
A structure is shown in which the leaf springs 19 and 19 press the lower leaf springs 14 and 14 that press the contact plate 12, respectively. This structure is suitable for reducing the spring force pressing the contact plate 12. In FIG. 14, the leaf spring 1 of the lower layer is viewed from the side.
An example is shown in which 4, 4 and 14 are configured to have an inverted C shape.

Next, in FIG. 15, the leaf springs are similarly doubled, but the leaf springs 14A and 1A are seen in a side view.
The case where 4B intersects is shown. In FIG. 15, the adjusting plate 18 is arranged at the tip of the adjusting screw 15, and
8 simultaneously displaces the pressure regulating portion Q of the leaf springs 19A and 19B, and the leaf springs 19A and 19B generated by this displacement
The pressing force of B is transmitted to the pressure adjusting portion P, and the leaf springs 14A and 14B are
The pressing force of is adjusted.

FIG. 16 shows a case in which the leaf spring is doubled, but the upper layer is a single leaf spring 19C. Then, the adjusting screw 15 adjusts the displacement of the central portion of the upper leaf spring 19C, and the spring force of the leaf spring 19C pushes the lower leaf spring 14G that pushes the contact plate 12. This structure is
This is suitable for reducing the spring force that presses the contact plate 12. In addition, in FIG. 16, a part of the tip of the adjusting screw 15 is inserted into the guide hole 19h of the leaf spring 19C.

Further, in the configuration of FIG. 16, the leaf spring 19 is
When the end P of C is free (sliding) with respect to the leaf springs 14G, 14G, the leaf spring 19 in the upper layer can exert a force in the direction of opening the leaf springs 14G, 14G. Finally, it can act as a pulling force between the pressing portions C of the contact plate 12.

On the contrary, the end portion P of the leaf spring 19C is connected to the leaf spring 14
When fixed (ultrasonic welding) to G and 14G,
By the leaf spring 19C of the upper layer, a force can be applied in the direction of closing the leaf springs 14G, 14G, and finally a compressive force can be applied between the pressing portions C of the contact plate 12, thus the leaf spring 14G. , 14G can reduce the tensile force.

Further, the leaf spring 1 in the upper layer of FIGS.
By changing the shape of 9, 19C and the leaf springs 14 and 14G of the lower layer, especially the length and the material, a bimetal effect can be obtained, and the pressing force or spring constant to be pressed changes depending on the temperature. Can be made.

The bimetal effect in which the pressing force and the spring constant change depending on the temperature is a leaf spring structure of one layer as shown in FIGS. 1 to 13, and the leaf spring is formed by forming two layers of different metals. In other words, it can be obtained by forming a bimetal.

The bimetal effect is particularly effective when the temperature-measuring object has a characteristic of softening as the temperature rises.

Various forms are conceivable for the shape of the leaf springs 14 and the arrangement of the pressing portion C and the pressure adjusting portion P. Examples of the arrangement are shown in FIGS. 17 (a) to 17 (h). The structure according to the invention is not limited to the arrangements shown in FIGS. 1 to 17 and can be freely selected within the scope of the claims.

[0077]

As described above, according to the contact type thermometer sensor of the present invention, the vicinity of both ends of the contact plate contacting the temperature-measuring body is held in a fixed or loose-fitting state, and 2 on both sides
Since the pressing portions above the points are pressed by the leaf spring, the portion between the pressing portions can be pressed against the temperature-measured body to make surface contact. Therefore, the heat can be smoothly transferred to the temperature sensing portion arranged between the pressing portions, and the temperature can be measured accurately.

Further, since the leaf spring is used to generate the pressing force, it is not necessary to generate the pressing force by the contact plate itself, so that the design of the contact plate is facilitated and the pressing force can be set and adjusted. It will be easy.

Further, since the structure of the pressing means is simplified by adopting the leaf spring, the number of parts can be reduced and the thickness of the sensor can be reduced.

Then, the contact plate support portion of the contact plate is loosely fitted in the elongated hole, and the contact plate moves within a predetermined range in the fixed support portion in a direction parallel to the surface in contact with the temperature-measured body. If the contact plate is held as possible, the deformation of the contact plate does not increase even if the frictional force acting on the contact plate increases, so that it is possible to prevent the contact plate from being distorted and floating from the body to be measured.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a contact-type thermometer sensor according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a lid portion of the contact thermometer sensor of FIG. 1 is removed.

3 is an exploded / assembled view of the contact thermometer sensor of FIG. 1. FIG.

4 is a view showing an assembled state of a contact plate and a leaf spring in the contact type thermometer sensor of FIG.

5 is a view showing an assembled state of a contact plate, a leaf spring, and a side portion in the contact thermometer sensor of FIG.

FIG. 6 is a view showing an assembled state of both side portions of the contact thermometer sensor of FIG.

FIG. 7 is a view showing an assembled state of a lid portion in the contact type thermometer sensor of FIG.

FIG. 8 is a diagram showing an assembled state of the contact thermometer sensor of FIG.

FIG. 9 is a side sectional view showing a configuration of a contact-type thermometer sensor according to a second embodiment.

FIG. 10 is a plan view showing a state in which the lid portion of the contact thermometer sensor of FIG. 9 is removed.

FIG. 11 is a side sectional view showing an example of a contact-type thermometer sensor in which both ends of a contact plate of another embodiment are rotatable but fixed in the moving surface direction.

FIG. 12 is a side sectional view showing an example of a contact-type thermometer sensor in which both ends of a contact plate of another embodiment are held so as to be movable in the direction of the moving surface on a rotating shaft.

FIG. 13 is a side sectional view showing an example of a contact-type thermometer sensor in which the adjusting screw is omitted and a leaf spring is pressed by a pressing portion provided on the lid according to another embodiment.

FIG. 14 is a side sectional view showing an example of a contact-type thermometer sensor in which the leaf springs of the other embodiments are doubled and the leaf springs are arranged in an inverted C shape in a side view.

FIG. 15 shows two leaf springs according to other embodiments.
It is a figure which shows the example of the contact-type thermometer sensor in case the leaf springs 14A and 14B cross | intersect from a side view, comprised in double, (a) is a sectional side view, (b) shows the laminated state of leaf springs. It is a top view.

FIG. 16 is a side sectional view showing an example of a contact-type thermometer sensor having a structure in which a lower leaf spring of another embodiment is pressed by a single upper leaf spring.

FIG. 17 is a view showing an example of the shape of a leaf spring and arrangement of a pressing portion and a pressure adjusting portion according to the present invention, and examples of the arrangement are shown in (a) to (h).

[Short description of symbols]

10, 10A, 10D to 10H Contact type thermometer sensor 11 Fixed support part (main body) 11A First side part 11B Second side part 11C Lid parts 12, 12D, 12E Contact plate 12s Contact plate support part 13 Temperature sensing part 14, 14A, 14B Leaf springs (pressing means) 18 Pressure regulating plates 19, 19A, 19B, 19C Upper-layer leaf springs (pressing means) 20 Temperature measurement object

Claims (5)

[Claims] 1. A contact-type temperature having a contact plate in contact with a temperature-measuring body, a temperature-sensing portion to which heat is transferred from the contact plate, and pressing means for pressing the contact plate against the temperature-measuring body. In the meter, the temperature sensing part is arranged behind the contact plate, and the contact plate supporting parts arranged near both ends of the contact plate are held by the fixed supporting part, and the pressing means is contacted at one end side by the contact part. A contact-type temperature sensor characterized in that a plate spring is pressed against a plate and the other end side is held by a fixed support part, and the contact plate is pressed by at least two pressing parts sandwiching the temperature sensing part. . 2. The pressing force of the pressing portion is adjusted by adjusting the amount of displacement of a pressure adjusting portion provided between the pressing portion of the leaf spring and a portion held by the fixed support portion. The contact type temperature sensor according to claim 1. 3. The pressing unit and the contact plate supporting unit are arranged on both sides of the temperature sensing unit.
Alternatively, the contact-type temperature sensor according to item 2. 4. The fixed support part holds the contact plate support part movably within a predetermined range in a direction parallel to a surface of the contact plate in contact with the temperature-measured body. Item 6. The contact type temperature sensor according to any one of items 1 to 3. 5. The leaf springs are arranged so as to intersect with each other in a side view, and the leaf springs press the contact plate with a pressing portion ahead of the temperature sensing portion. The contact-type temperature sensor according to any one of 1.