JP2005010040A - Sensor sheet for measurement of nip width - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sensor sheet for measuring a nip width which measures the nip width with high precision on real time. <P>SOLUTION: On a film member 1, 1st electrodes R with 0.1 to 3mm intervals extending toward perpendicular directions to feeding direction of the film member to a roller are formed, and on the another film member 2, 2nd electrodes C with 2 to 50mm intervals extending in a feeding direction of the film member 2 are formed, wherein between the mutual adjacent electrodes C, C, only the C side of the 2nd electrode is coated with pressure sensitive-conductive ink 20 so as to be a mode of electrically insulated state, and the film members 1, 2, are mutually glued together while holding the pressure sensitive-conductive ink 20 inbetween. The intersection of the 1st electrode R, and the 2nd electrode C via the pressure sensitive-conductive ink 20 is made a pressurization detection cell. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pair of metal rollers, a pair of rubber rollers, or a sensor sheet for measuring a nip width for measuring a nip width generated between the metal roller and the rubber roller.
[0002]
[Prior art]
Rollers are used for forming, processing, and conveying sheet-like products such as printing machines, laminating machines, papermaking machines, printers, etc., and managing the pressure and nip width (width that the rollers come in contact with) is the product yield and performance. It has become an important element.
[0003]
Up to now, the nip width is measured by using a pressure-sensitive film that bursts at a predetermined pressure, or by attaching arbitrary ink to the roller to be measured and sandwiching paper or the like to determine the width of the transferred ink. There was a way to read.
[0004]
However, both methods are difficult and difficult to determine the boundary of the contact portion, and are difficult and inaccurate, such as using a measure for reading. Also, in order to record, manage, and analyze the measured values on a personal computer, it is time-consuming to input the read values manually.
[0005]
By the way, as shown in FIG. 8, the pressure distribution sensors currently manufactured and sold by our company apply pressure-sensitive inks 81 and 91 to the matrix electrodes 80 and 90 printed on the films 8 and 9, respectively. There is one that detects the pressed position and size by sequentially operating the resistance values of the intersecting portions of the pressure sensitive inks 81 and 91 facing each other of the matrix electrodes 80 and 90 (for example, Patent Document 1).
[0006]
Our company started developing a sensor sheet for measuring the nip width to measure the nip width using the pressure distribution sensor, but it was extremely difficult to complete.
[0007]
[Patent Document 1]
Japanese Patent No. 3336429 (especially FIGS. 2 and 7)
[0008]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a sensor sheet for nip width measurement that can measure the nip width with high accuracy in real time.
[0009]
[Means for Solving the Problems]
(Invention of Claim 1)
In the sensor sheet for measuring the nip width according to the present invention, the first electrode extending in a direction perpendicular to the feeding direction to the roller is formed on one film member at intervals of 0.1 to 3 mm, and the feeding direction to the roller is formed on the other film member. The pressure sensitive conductive ink is applied only to the second electrode side in such a manner that the second electrodes extending in the direction of 2 to 50 mm are formed at intervals of 2 to 50 mm and the adjacent second electrodes are electrically insulated from each other. The film member is bonded to each other in such a manner as to sandwich the property ink, and the intersection of the first and second electrodes through the pressure-sensitive conductive ink is used as a pressure detection cell.
(Invention of Claim 2)
The sensor sheet for nip width measurement according to the present invention relates to the invention according to claim 1, wherein the pressure detection cell is energized between the first and second electrodes, and the pressure detection cell is in a pressurized state / non-pressurized state. Can be detected.
(Invention of Claim 3)
The sensor sheet for nip width measurement according to the present invention relates to the invention according to claim 1 or 2, wherein the first electrode is one of a row electrode or a column electrode, and the second electrode is one of a row electrode or a column electrode.
[0010]
The actions and effects of the sensor sheet for nip width measurement according to the present invention will be clarified in the column of the embodiment of the present invention.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A nip width measurement sensor sheet according to an embodiment of the present invention will be described below.
Embodiment 1
FIG. 1 is a view immediately before a sensor sheet S for nip width measurement according to an embodiment of the present invention is inserted between rollers RL and RL. FIG. 2 is a plan view showing components of the sensor sheet S for nip width measurement. 3 is an exploded perspective view of the sensor sheet S for nip width measurement, and FIG. 4 shows a pressure detection cell X of the sensor sheet S for nip width measurement.
(About sensor sheet S for nip width measurement)
As shown in FIGS. 1 to 4, the nip width measurement sensor sheet S includes 44 first electrodes R <b> 1 to R <b> 44 extending in a direction perpendicular to the feeding direction to the roller RL on one film member 1. 6 second electrodes C1 to C6 extending in the feeding direction to the roller RL are printed and formed on the other film member 2 at intervals of 7.5 mm, and the adjacent second electrodes are insulated from each other. In one aspect, the pressure sensitive conductive ink 20 is applied only to the second electrodes C1 to C6 side, and the pressure sensitive conductive ink 20 is sandwiched between the first and second electrodes R1 to R44 and C1 to C6. 1, 2 are bonded together with an adhesive.
[0012]
Here, the first and second electrodes R1 to R44 and C1 to C6 described above are connected to the terminals 12 and 22 via the conductive lines 11 and 21, as shown in FIG. R44, the conductive line 11 and the terminal 12 are printed and formed integrally with the film member 1, and the second electrode 20, the conductive line 21 and the terminal 22 are printed and formed integrally with the film member 2.
[0013]
Further, as shown in FIG. 4, the intersections of the first and second electrodes R1 to R44 and C1 to C6 through the pressure-sensitive conductive ink 20 are set as the pressure detection cells X (6 × 44 = 264).
[0014]
The film members 1 and 2 are made of various resins such as a polyester resin having flexibility, and the thickness is set to 25 μm (can be set in a range of 10 to 200 μm).
[0015]
The first and second electrodes R1 to R44, C1 to C6, the conductive lines 12 and 22, and the terminals 13 and 23 are made of conductive ink, and the conductive ink is specifically made of various resins (for example, polyester resin). ) Is a so-called silver ink in which silver powder is kneaded. In addition, the thickness of the print formation by silver ink is set to 10 μm (can be set in the range of 5 to 20 μm).
[0016]
The pressure-sensitive conductive ink 20 is composed of an ink containing semiconductor particles and conductor particles in a resin. In addition, the thickness of the print formation by the pressure-sensitive conductive ink 20 is set to 10 μm (can be set in the range of 5 to 50 μm).
[0017]
Therefore, the thickness of the nip width detecting portion in the nip width measuring sensor sheet S is about 80 μm.
(A circuit for reading output from the sensor sheet S for nip width measurement by a personal computer)
The circuit for reading the output from the sensor sheet S for measuring the nip width is connected to the computer CP via the connector CT and the interface circuit IF as shown in FIG.
(1) First, when reading the output from the sensor sheet S for measuring the nip width, the connector CT provided in the reading circuit is connected to the terminals 12 of the sensor sheet S for measuring the nip width as shown in FIGS. 22 is connected.
(2) When the row counter 70 increases the count by “1” by the clock signal from the interface circuit IF, the switch of the multiplexer 71 is switched corresponding to the count of the row counter 70. Therefore, the applied voltage (−V) is sequentially applied to the row electrodes R1 to R44 via the amplifier 73 (the input side of the amplifier 73 is kept at the ground potential by the resistor 72).
(3) Between the application of the voltage to the row electrode R1 and the application of the voltage to the next row electrode R2, the switch of the multiplexer 76 is switched by the output from the column counter 77, and the column electrodes C1 to C6 are scanned in this order. The This scan is performed at each of the row electrodes R1 to R44.
{Circle around (4)} When a pressure is applied to the pressure sensing part X, the switch 60 is closed and a current flows in sequence to the column electrodes C1 to C6, and is inverted and amplified by the resistors 74 and the amplifiers 75 of the respective columns. The inverted and amplified output voltage is sequentially sent to the register 78 by the column multiplexer 76, sent to the interface circuit IF as a digital signal, and further transferred to the computer CP.
(5) The basic operation of the computer CP, the interface circuit IF, and the output reading circuit described above is well known (disclosed in Japanese Patent Publication No. 62-502665) and will not be described in detail.
(Excellent points when using sensor sheet S for nip width measurement)
(1) The hitting width (nip width) of the roller RL, which could only be seen indirectly with a pressure-sensitive film or the like, can be directly confirmed in real time and sequentially measured. As for accuracy, since the 44 first electrodes R1 to R44 extending in the direction perpendicular to the feeding direction to the roller RL are printed on the film member 1 at intervals of 0.5 mm, the accuracy is about 0.5 mm. Can be recognized.
(2) Since the surface of the sensor sheet S for measuring the nip width is formed of a resin such as polyester resin, it can be used repeatedly, and the running cost can be greatly reduced.
(3) Since the collected data can be transferred as a digital value on the computer CP, management and analysis are easy.
[Embodiment 2]
In the sensor sheet S for nip width measurement according to Embodiment 1 described above, the layer width (mm) of the row electrodes is only resolution (pitch) × number of electrodes = 0.5 × 44 = 22 mm, and thus a large nip width is measured. In some cases, the width is narrow and difficult to use.
[0018]
Therefore, in the second embodiment, as shown in FIG. 5, six column electrodes C1 to C6 and C7 to C12 are arranged in two upper and lower stages in a plan view, and the row electrodes R1 to R44 are routed twice to form the row electrodes. Is increased to about twice that of the first embodiment.
[0019]
The sensor sheet S for nip width measurement according to the second embodiment can measure the nip width with high accuracy in real time even with a wide nip width, and has other functions and effects described in the column of the first embodiment. ing.
[Embodiment 3]
In the third embodiment, as shown in FIG. 6, six column electrodes C1 to C6, C7 to C12, C13 to C18, C19 to C24, C25 to C30, C31 to C36, and C37 are arranged in eight stages in plan view. -C42, C43-C48 are arranged, the row electrodes R1-R44 are routed eight times, and the total width of the row electrodes is increased to about eight times that of the first embodiment.
[0020]
In the sensor sheet S for measuring the nip width of the third embodiment, the nip width of the entire circumference of the roller can be measured by inserting the roller RL and RL between the rollers RL and RL while rotating the rollers RL and RL. It has other functions and effects described in the column.
[Other Embodiments]
In order to change the measurement accuracy of the nip width, the first electrode is printed at intervals of 0.1 to 3 mm (preferably 0.1 to 1 mm, more preferably 0.1 to 0.5 mm) instead of the above-described embodiment. can do.
[0021]
In the above-described embodiment, the second electrodes are printed and formed at intervals of 7.5 mm. Alternatively, the second electrodes can be printed and formed at intervals of 2 to 50 mm.
[0022]
The first and second electrodes may be formed by ink jet or etching methods.
[0023]
【The invention's effect】
Since the present invention is configured as described above, it has the following effects.
[0024]
From the contents described in the column of the embodiment of the invention, a sensor sheet for nip width measurement capable of measuring the nip width with high accuracy in real time could be provided.
[Brief description of the drawings]
FIG. 1 is a view just before a nip width measurement sensor sheet according to Embodiment 1 of the present invention is inserted between rollers.
FIG. 2 is a plan view showing components of the sensor sheet for nip width measurement.
FIG. 3 is an exploded perspective view of the sensor sheet for measuring the nip width.
FIG. 4 is a plan view showing a pressure detection cell of the sensor sheet for measuring the nip width.
FIG. 5 is a plan view showing components of a nip width measurement sensor sheet according to Embodiment 2 of the present invention.
FIG. 6 is a view immediately before inserting a sensor sheet for nip width measurement according to Embodiment 3 of the present invention between rollers.
FIG. 7 is an explanatory diagram of an output reading circuit of the nip width measurement sensor sheet.
FIG. 8 is an exploded perspective view of a sensor sheet for nip width measurement according to the prior art.
[Explanation of symbols]
RL roller R first electrode C second electrode 1 film member 2 film member 11 conductive line 12 terminal 20 pressure-sensitive conductive ink 21 conductive line 22 terminal

Claims (3)

The first electrode extending in the direction perpendicular to the feeding direction to the roller is formed on one film member at intervals of 0.1 to 3 mm, and the second electrode extending in the feeding direction to the roller is formed on the other film member at intervals of 2 to 50 mm. The pressure sensitive conductive ink is applied only to the second electrode side so that the adjacent second electrodes are electrically insulated from each other, and the film members are bonded together in such a manner that the pressure sensitive conductive ink is sandwiched between them. A nip width measurement sensor sheet in which the intersection of the first and second electrodes via the pressure-sensitive conductive ink is used as a pressure detection cell. 2. The nip width according to claim 1, wherein the pressure detection cell is configured such that a pressure state / non-pressure state can be detected by the pressure detection cell by energizing between the first and second electrodes. Sensor sheet for measurement. The sensor sheet for nip width measurement according to claim 1 or 2, wherein the first electrode is one of a row electrode or a column electrode, and the second electrode is one of a row electrode or a column electrode.

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