KR101104939B1 - Tension Detecting Apparatus by Changing Contact Resistance - Google Patents

Abstract

The present invention relates to a tension detector used in a converting equipment, and more particularly, a contact that detects the tension of a fabric by detecting a change in contact resistance and a step-by-step detection by detecting a change in contact resistance. The present invention relates to a tension detector using a change in resistance.

The tension detector using the change of contact resistance of the present invention having the above-described configuration detects the change in contact resistance and thus detects the tension, thereby making it easy to adjust the interval of the measured value, thereby making it possible to subdivide the measured value more precisely. have.

In addition, when the pressure sensor using the pressure switch array is applied, the sensor detects a change in resistance without directly contacting the tension detection roller and the support, so that there is no deformation due to mechanical contact and is not affected by external environment such as vibration or moisture. As a result, accurate measurement is possible.

In addition, the sensor using a change in contact resistance has a simple configuration and low cost of manufacturing and maintenance.

Converting, converting, contact resistance, pressure sensor, tension detector

Description

Tension Detecting Apparatus by Changing Contact Resistance

The present invention relates to a tension detector used in a converting equipment, and more particularly, a contact that detects the tension of a fabric by detecting a change in contact resistance and a step-by-step detection by detecting a change in contact resistance. The present invention relates to a tension detector using a change in resistance.

The converting equipment refers to a processing machine that rewinds a web, such as paper, film, aluminum foil, or copper foil, by cutting it to an arbitrary new width (several mm to several m). This is due to the need for the development of new materials and new applications, the diversified materials and specifications are diversified, and the marketing area of converting is becoming very wide according to the trend of high speed and large area of display panel for productivity improvement.

As a representative converting equipment, a slitter rewinder is an unwinder 100 that continuously releases a fabric as shown in FIG. 1, and an unwinder installed at one side of the unwinder 100. Induction roller 200 to guide the fabric of the 100, and installed on one side of the induction roller 200, a tension detector 300 for detecting the tension of the fabric and a plurality of fabrics passed through the tension detector 300 It includes a slitter 400 for cutting with a rewinder 500 for winding the fabric cut in each shape again in a roll.

At this time, the most important item in the performance of the slitter rewinder is the working speed. As the production of fabric increases in proportion to the working speed, the speeding up of the working speed is the most important key factor of the related technology. The development of technology related to the dynamic control of the rewinder is essential for the high speed of the work of the slitter rewinder.The dynamic control is the tension control of the fabric, the dynamic stability control of the fabric generated during high-speed winding, the cutting part and the winding cross section of the fabric. Can be subdivided by the control of uniformity.

Among these, the tension change of the fabric generated at high speed winding is the most important factor in the dynamic control of the rewinder, and the uniform control of the tension is the core technology of the dynamic control. If the tension is not controlled uniformly, the roll of the fabric is torn, folded, or wrinkled, resulting in an uneven shape of the roll, and when the tension generated during the work exceeds the elastic limit of the fabric, the fabric is wound up without being restored. The problem is that the right shape is maintained or broken.

In order to solve the above problems, a method of measuring a load F added to the roll 310 through the sensor 320 is conventionally used as shown in FIG. 2, and a strain gauge attached to an elastic body is generally used. A method of measuring a displacement of an elastic body using a differential transformer or a differential transformer has been disclosed. However, in the case of strain gauge method, responsiveness can be detected quickly and fairly precise load, but there is a problem that is very vulnerable to the environment such as deformation of the support by vibration, mechanical vibration, and other moisture. There is a need for additional signal amplification circuits, and in the case of high-tension measuring sensor modules, there is still a problem that equipment operation costs increase because domestic technology is not sufficiently secured to rely on imports from developed countries.

The present invention has been made to solve the above problems, an object of the present invention is to use a sensor that can detect the change in contact resistance step by step, or to physical contact between the elastically deformed conductive diaphragm and the pressure switch array The present invention provides a tension detector using a change in contact resistance that can accurately measure fabric tension before and after slitting, which has a significant effect on the quality of slitter rewinder equipment, by using a sensor that detects pressure by using a change in electrical resistance. .

The tension detector using the change of the contact resistance of the present invention is installed between the unwinder for unwinding the fabric continuously and the rewinder for rewinding the fabric cut by the slitter in the tension detector 300 for detecting the tension of the fabric. In the tension detector 300, the sensor unit 20 is provided with a sensor 10 for detecting the tension of the fabric, wherein the sensor 10 is tensioned by using a change in contact resistance It characterized by measuring the.

In addition, the tension detector 300 is the fabric is guided, the detection roller 30 for transmitting the tension guided by the fabric to the sensor unit 20; A bearing unit 40 to which the detection roller 30 is rotatable along the fabric; It is made, including, the sensor unit 20 is characterized in that it is installed on the lower surface of the bearing unit (40).

In addition, the tension detector 300, the upper surface is coupled to the lower surface of the bearing unit 40 support plate 50 for supporting the bearing unit 40; Hinge support that is coupled to one side of the lower surface of the support plate 50 so that the support plate 50 is spaced apart a predetermined distance upward from the ground, the hinge portion 61 is formed so that the other side of the support plate 50 can be rotated up and down 60; A detection support (70) opposed to the hinge support (60) and installed on the other side of the support plate (50) so that the other side of the support plate (50) can be pivoted up and down; It is made, including, the sensor unit 20 is installed on the side of the detection support 70, is connected to the lower surface of the support plate 50 to measure the load in accordance with the vertical movement of the support plate 50 It is characterized by detecting the tension of.

In addition, an elastic member 80 is provided at the connection portion between the detection support 70 and the support plate 50 to restore the support plate 50 to its original position when a load is not transmitted to the support plate 50. It features.

In addition, the sensor unit 20 is coupled to the sensor (21, 10), the lower end of the support and the load transfer shaft 22 for transmitting the vertical movement of the support 50 to the sensor (21, 10) And an outer case 23 in which the sensors 21 and 10 are accommodated.

In addition, the sensor 21 is coupled to the lower end of the load transfer shaft 22 and the conductor (21a) formed in the longitudinal direction up and down; A wafer (21b) including a flow groove (21c) having an upper portion open and formed in a vertical longitudinal direction so that the conductor (21a) is inserted and can flow vertically; A first metal plate 21d formed at one side of the flow groove; A second metal plate 21e formed on the other side of the flow groove; The first and second metal plates 21d and 21e; A plurality of resistors 21f formed in the vertical direction at regular intervals in the plurality of resistors 21f; It comprises a power supply portion (21h) consisting of a lead wire (21g) for electrically connecting the first and second metal plate (21d, 21e), the first metal plate (21d) and the second metal plate (21e) is It is characterized by being energized by the conductor 21a.

The sensor 10 is connected to the lower end of the load transmission shaft 22 and having a conductive diaphragm (2); An upper wafer (4) forming a lower chamber (5) having a cross section with an upper opening at one side of the diaphragm (2); A lower wafer (1) formed on an opposite side of the diaphragm (2) and coupled to a lower surface of the upper wafer (4) to seal the lower chamber (5); A plurality of annular metal thin films 3 formed to be spaced apart from each other on the basis of the annular reference thin film 11 formed at the center of the upper end surface of the lower wafer 1; A plurality of resistors 7 continuously connected in series with the metal thin film 3 in the annular radial direction from the reference thin film 11; And a power supply unit 9 including a lead wire 8 electrically connecting the metal thin film 3 and the resistor 7 to each other. Characterized in that comprises a.

The tension detector using the change of the contact resistance of the present invention by the above configuration detects the change in the contact resistance and thus detects the tension. have.

In addition, when the pressure sensor using the pressure switch array is applied, the sensor detects the change in resistance without directly contacting the tension detection roller and the support, so that there is no deformation due to mechanical contact, and it is not affected by external environment such as vibration or moisture. There is no effect that can be precisely measured.

In addition, the sensor using a change in contact resistance has a simple configuration and low cost of manufacturing and maintenance.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

3 is a front view showing a tension detection method of the tension detector, Figure 4 is a front view of the tension detector of the present invention. Fig. 5A is a sensor conceptual diagram and circuit diagram (when the load is small) of the present invention, and Fig. 5B is a sensor conceptual diagram and circuit diagram (when the load is large) of the present invention.

Before describing an embodiment of a tension detector using a change in contact resistance of the present invention, a method of detecting tension is described.

As shown in FIG. 3, a force added to the detection roller 30 may be measured to detect the tension of the fabric, and the tension may be calculated through the measured force. The calculation is as follows.

(F: Force, T: Tension, θ: Fabric Angle, Rw: Detection Roller Weight)

4 to 6, the tension detector 300 using the change of the contact resistance of the present invention is the sensor unit 20, the detection roller 30, the bearing unit 40, the support plate 50, the hinge support ( 60), the detection support 70 and the elastic member 80 is characterized in that it comprises.

The tension detector 300 may be installed between the unwinder for releasing the fabric continuously and the rewinder for rewinding the fabric cut by the slitter to detect the tension of the fabric.

The detection roller 30 may be formed in a cylindrical shape. The outer circumferential surface of the detection roller 30 is wrapped around the fabric, it may be formed so that the fabric can be moved by the rotation of the detection roller (30). In this case, the fabric may be formed at an angle with respect to the rotation axis of the detection roller 30. This is to force the pressing force of the detection roller 30 in one direction when the tension of the fabric is strong, and the pressing force of the detection roller 30 is weakened when the tension of the fabric is weak.

Both ends of the bearing unit 40 may be connected to the rotating shaft of the detection roller 30 so that the detection roller 30 is rotatable. The bearing unit 40 is applied to the configuration of the roller unit that is commonly used bar detailed description thereof will be omitted.

The support plate 50 may be formed to be spaced apart from the bottom surface through the hinge support 60 and the detection support 70 in a plate shape. The support plate 50 may be a steel or aluminum material having a durable plate shape. The lower surface of the bearing unit 40 may be coupled to the upper surface of the support plate 50. The support plate 50 and the bearing unit 40 may be screwed or bolted.

The support plate 50 serves to transfer the load transmitted through the detection roller 30 to the sensor unit 20.

The hinge support 60 may be connected to one side of the bottom surface of the support plate 50. The hinge support 60 may include a hinge portion 61. The hinge support 60 may be formed so that the support plate 50 is spaced a predetermined distance from the bottom surface so as to be movable up and down by the load of the detection roller 30. In addition, the hinge part 61 may be provided so that one side of the support plate 50 may be rotatable around the hinge part 61, and the other side of the support plate 50 may be movable up and down. The hinge portion 61 may be applied to the configuration of the commonly used hinge.

The detection support 70 may be connected to the other side of the bottom surface of the support plate 50. The detection support 70 may be formed to face the hinge support 60. The detection support 70 may be connected so that the other side of the support plate 50 can be rotated up and down. In this case, an elastic member 80 may be provided at a connection portion between the detection support 70 and the support plate 50. The elastic member 80 is provided so that the load applied to the support plate 50 moves downward when overcoming the elastic force of the elastic member 80, and the load applied to the support plate 50 is weakened. When the elastic force of the elastic member 80 is not overcome, the support plate 50 may be restored to its original position. The elastic member 80 may be used, such as a leaf spring or coil spring.

The sensor unit 20 may include a sensor 21, a load transfer shaft 22, and an outer case 23.

The outer case 23 may be coupled on the side of the detection support 70. The sensor 21 may be installed inside the outer case 23. The load transfer shaft 22 may be formed in the vertical direction in the vertical direction. An upper end of the load transfer shaft 22 may be connected to a lower surface of the support plate 50, and a lower end may be formed to penetrate the upper surface of the outer case 23. The load transfer shaft 22 serves to transfer the load transmitted from the support plate 50 to the sensor 21.

The sensor 21 may be a level sensor for measuring the pressure using a change in contact resistance. The sensor 21 may include a conductor 21a, a wafer 21b, first and second metal plates 21d and 21e, a resistor 21f, and a power supply 21h.

The conductor 21a may have a rod shape that is formed in the vertical direction. An upper end of the conductor 21a may be connected to the lower end of the load transfer shaft 22. The conductor 21a may be any material as long as it is electrically conductive, but a steel material may be used for durability. The conductor 21a may be formed to be able to rotate vertically according to the rotation of the load transfer shaft 22.

The wafer 21b may be formed at the lower end of the conductor 21a. The wafer 21b may be formed with a flow groove 21c which is opened upwardly so that the conductor 21a is inserted therein. The flow groove 21c may be formed in the vertical direction in such a manner that the conductor 21a may be inserted and rotate up and down. The wafer 21b may be made of a silicon material. This is to insulate the conductor 21a from the outer case 23.

A side of the flow groove 21c may be provided with a first metal plate 21d on one side and a second metal plate 21e on the other side. The first metal plate 21d and the second metal plate 21e may be formed vertically in the vertical direction and spaced apart from each other. The first metal plate 21d and the second metal plate 21e may be formed to be energized by the conductor 21a.

A plurality of resistors 21f may be formed in the first metal plate 21d and the second metal plate 21e in the vertical direction. The resistor 21f may be formed along a vertical direction but spaced apart from a predetermined distance. Accordingly, as the conductor 21a is moved downward, the resistors 21f connected to each other increase, thereby changing the electrical resistance.

The power supply unit 21h is configured to electrically connect the first metal plate 21d and the second metal plate 21e with a lead wire 21g.

 In the sensor 21 having the above configuration, the introduced pressure moves the conductor 21a downward, and the conductor 21a energizes the first metal plate 21d and the second metal plate 21e. At the same time, it is in contact with the resistor 21f formed in the longitudinal direction up and down, and as the conductor 21a moves downward, it is in contact with a larger number of resistors 21f so as to change the variable resistance value so that the pressure can be measured. .

The sensor unit 20 of the second embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 6 is a front view of the tension detector of the second embodiment of the present invention, and Fig. 7 is a sectional view of the sensor of the second embodiment of the present invention. 8 is a cross-sectional view of a sensor operating state of the second embodiment of the present invention, and FIG. 9 is a sensor circuit diagram of the second embodiment of the present invention.

Referring to FIG. 6, the sensor unit 20 may include a sensor 10, a load transfer shaft 22, and an outer case 23.

The outer case 23 may be coupled on the side of the detection support 70. The sensor 10 may be installed inside the outer case 23. The load transfer shaft 22 may be formed in the vertical direction in the vertical direction. An upper end of the load transfer shaft 22 may be connected to a lower surface of the support plate 50, and a lower end thereof may be connected to an upper surface of the outer case 23. The load transfer shaft 22 serves to transfer the load transmitted from the support plate 50 to the sensor 10.

7 to 9, the sensor 10 may use a pressure switch array that measures pressure by a change in contact resistance.

The sensor 10 is a conductive diaphragm 2 is deformed by the pressure introduced from the load transfer shaft 22, expands in an annular shape is deposited and fixed in the center of the upper surface of the lower wafer (1) pressure A device for detecting pressure by using a change in electrical resistance caused by contact with the metal thin film 3 constituting the switch array, the diaphragm 2, the upper wafer 4, the lower wafer 1, the metal thin film 3 And a resistor 7 and a power supply 9. In this case, the load transmission shaft 22 and the diaphragm 2 may not be directly connected, and may be formed to receive pressure through the pressure introduction chamber 6 formed at the upper end of the upper wafer 4.

The diaphragm 2 may be formed of a silicon thin film etched to a predetermined thickness. The lower surface of the diaphragm 2 is formed to have conductivity by depositing a conductive thin film 2a such as aluminum. The upper wafer 4 is made of a silicon material, and supports a side surface of the diaphragm 2, and has a lower chamber 5 having a cross-sectional shape with an upper portion opened on a lower surface of the diaphragm 2, and a lower chamber on an upper surface thereof. It consists of a pressure introduction chamber (6) which faces 5) and has an open cross section. Pressure is introduced from the pressure introduction chamber 6, and the introduced pressure causes the diaphragm 2 having conductivity and flexibility to deform.

The lower wafer 1 is made of Pyrex glass and is formed on an opposite side of the diaphragm 2 so as to seal the lower chamber 5 side of the upper wafer 4 at the lower surface of the upper wafer 4. Is bonded through an anodic bonding or the like.

The metal thin film 3 is formed in an annular shape extending on the center of the top surface of the lower wafer 1 with respect to the annular thin film hole 12 and is fixed by deposition. At this time, the annulus is formed to be spaced apart by a predetermined interval to form the annular thin film hole 12 between the annular.

The resistor 7 is continuously connected in series with the metal thin film 3 in the annular radial direction from the reference thin film 11, and is formed of ITO (Indium Tin Oxide) material.

The power supply unit 9 is configured to electrically connect the metal thin film 3 and the resistor 7 using the lead wires 8.

In the sensor 10 of the present invention as described above, when pressure is introduced from the pressure introduction chamber 6 of the upper wafer 4, the diaphragm 2 having flexibility and conductivity moves toward the lower wafer 1 by the pressure. The bent, the bent diaphragm (2) is formed in the lower chamber (5) of the closed upper wafer (4) extending in an annular shape from the center of the lower surface of the lower wafer (1) to form an annular pressure switch array It comes in contact with (3). That is, the introduced pressure makes it possible to measure the pressure by changing the variable resistance value by contacting the diaphragm 2 with the contact portion of the metal thin film 3 in which the resistors 7 are connected in series.

In addition, by adjusting the interval of the metal thin film 3 is formed in an annular expansion, there is an effect that can adjust the interval of the measured value of the resistor 7 to correct the non-linearity of the output characteristics.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not satisfy all of the technical idea of the present invention, and various equivalents may be substituted for them at the time of the present application. It should be understood that there may be water and variations.

1 is a conceptual perspective view of a slitter rewinder

2 is a front view of a conventional tension detector

Figure 3 is a front view showing the tension detection method of the tension detector

Figure 4 is a front view of the tension detector of the present invention

Figure 5a is a schematic diagram and circuit diagram of the present invention (when the load is small)

Figure 5b is a schematic diagram and circuit diagram of the present invention (when the load is large)

6 is a front view of a tension detector of a second embodiment of the present invention;

7 is a cross-sectional view of a sensor in a second embodiment of the present invention.

8 is a cross-sectional view of a sensor operating state of the second embodiment of the present invention.

9 is a sensor circuit diagram of a second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

300: tension detector

10: sensor

20: sensor unit 21: sensor

21a: conductor 21b: wafer

21c: flow groove 21d: first metal plate

21e: 2nd metal plate 21f: resistor

21g: lead wire 21h: power supply

22: load transfer shaft 23: outer case

30: detection roller

40: bearing unit

50: support plate

60: hinge support 61: hinge portion

70: detection support 80: elastic member

Claims (7)

delete In the tension detector 300 is installed between the unwinder for continually unwinding the fabric, and the rewinder rewinding the fabric cut by the slitter to detect the tension of the fabric, The tension detector 300, A sensor unit 20 having a sensor 10 for detecting the tension of the fabric; The fabric is guided, the detection roller 30 for transmitting the tension is guided to the sensor unit 20; And A bearing unit 40 to which the detection roller 30 is rotatable along the fabric; Including but not limited to, The sensor unit 20 is installed on the lower surface of the bearing unit 40, the sensor 10 is a tension detector using a change in contact resistance, characterized in that for measuring the tension by using a change in the contact resistance. 3. The method of claim 2, The tension detector 300 is An upper surface coupled to a lower surface of the bearing unit 40 to support the bearing unit 40; Hinge support that is coupled to one side of the lower surface of the support plate 50 so that the support plate 50 is spaced apart a predetermined distance upward from the ground, the hinge portion 61 is formed so that the other side of the support plate 50 can be rotated up and down 60; A detection support (70) opposed to the hinge support (60) and installed on the other side of the support plate (50) so that the other side of the support plate (50) can be pivoted up and down; And, The sensor unit 20 is installed on the side of the detection support 70, connected to the lower surface of the support plate 50 to measure the load according to the vertical movement of the support plate 50 to detect the tension of the fabric Tension detector using a change in contact resistance characterized in that. The method of claim 3, An elastic member 80 is provided at the connection portion between the detection support 70 and the support plate 50 to restore the support plate 50 to its original position when a load is not transmitted to the support plate 50. Tension detector using change of contact resistance. The method according to claim 3 or 4, The sensor unit 20 Sensor 21 and 10, the upper end is coupled to the lower surface of the support plate 50, the load transfer shaft 22 for transmitting the vertical movement of the support plate 50 to the sensor 21, 10, and the sensor 21 , And a tension detector using a change in contact resistance, characterized in that it comprises an outer case 23 is received. The method of claim 5, The sensor 21 is A conductor 21a coupled to the lower end of the load transfer shaft 22 and formed in a vertical direction and having conductivity; A wafer (21b) including a flow groove (21c) having an upper portion open and formed in a vertical longitudinal direction so that the conductor (21a) is inserted and can flow vertically; A first metal plate 21d formed at one side of the flow groove; A second metal plate 21e formed on the other side of the flow groove; The first and second metal plates 21d and 21e; A plurality of resistors 21f formed in the vertical direction at regular intervals on the substrate; And A power supply unit (21h) comprising lead wires (21g) for electrically connecting the first and second metal plates (21d, 21e); , &Lt; / RTI &gt; And said first metal plate (21d) and said second metal plate (21e) are energized by said conductor (21a). The method of claim 5, The sensor 10 is A diaphragm 2 connected to a lower end of the load transmission shaft 22 and having conductivity; An upper wafer (4) forming a lower chamber (5) having a cross section with an upper opening at one side of the diaphragm (2); A lower wafer (1) formed on an opposite side of the diaphragm (2) and coupled to a lower surface of the upper wafer (4) to seal the lower chamber (5); A plurality of annular metal thin films 3 formed to be spaced apart from each other on the basis of the annular reference thin film 11 formed at the center of the upper end surface of the lower wafer 1; A plurality of resistors 7 continuously connected in series with the metal thin film 3 in the annular radial direction from the reference thin film 11; And A power supply unit 9 composed of a lead wire 8 electrically connecting the metal thin film 3 and the resistor 7 to each other; Tension detector using a change in contact resistance, characterized in that comprises a.

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