KR100217746B1 - Roll paper remaining amount detection device and display method - Google Patents

Abstract

1. Technical field to which the invention described in the claims belongs

A device for detecting residual amount of recording paper and a display method thereof.

2. Technical Challenges to be Solved by the Invention

Conventionally, it has not been known how much the amount of recording paper that remains at present during use in all devices using roll recording paper.

3. The point of the solution of the invention

The present invention relates to an apparatus and method for detecting a residual amount of recording paper for calculating and displaying an initial value, a used amount, and a remaining amount of recording paper by measuring one rotation time of the recording paper, one rotation time and revolution number of the roller, .

4. Important Uses of the Invention

Equipment that uses roll paper.

Description

Roll paper remaining amount detection device and display method

FIG. 1 is a state in which the remaining amount of a conventional roll paper is displayed. FIG.

FIG. 2 is a cross-sectional view of rollers and roll paper according to an embodiment of the present invention. FIG.

FIG. 3 is a block diagram of an apparatus for detecting a remaining amount of roll paper according to an embodiment of the present invention. FIG.

FIG. 4 is a block diagram of an apparatus for detecting remaining amount of roll paper according to an embodiment of the present invention; FIG.

FIG. 5 is a control flowchart for determining a roll paper initial value according to an embodiment of the present invention; FIG.

6 is a control flowchart for determining a remaining amount of roll paper according to an embodiment of the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

210: roll paper 212: roller,

216: core 314, 326: shaft,

318: first cam (cam) 320: first projection

322: first sensor 324: first actuator

328: second cam (cam) 330: second actuator

332: second sensor 334: second sensing unit

The present invention relates to an apparatus and method for detecting a remaining amount of roll paper, and more particularly, to a device for detecting a current roll paper remaining amount in a device using roll paper and a method for displaying the remaining amount of roll paper.

FIG. 1 is a state diagram showing the remaining amount of a conventional roll paper.

A conventional method for detecting the remaining amount of roll paper will be described with reference to FIG. 1. Since there is no way to check the remaining amount of the roll paper 110 during use in a facsimile machine or the like using the roll paper 110, the amount of roll paper 110 wrapped around the roll paper 110 can not be checked to what extent it remains. In addition, the roll paper remaining amount indication is displayed on the roll paper 110 at a distance of one meter (for example, 1 mm) of the roll paper 110 wound on the roll 114 as shown in FIG. 1 so that the roll paper 110 can be replaced when the roll paper 110 is consumed to some extent m), a black or red band 112 is displayed.

Meanwhile, when the black or red band 112 is detected during use of the roll paper 110 through the apparatus, the user can detect that the roll paper 110 has been consumed so that the roll paper 210 is exchanged.

As described above, conventionally, when the black or red band 112 of the roll paper 110 is outputted, it is possible to know the replacement timing of the roll paper. In this case, the remaining amount of the remaining roll paper 110 can not be known, I felt it. In addition, there is a problem that the points of attachment of the black or red strips 112 of the roll paper 110 overlap with the print contents to be printed, thereby erasing part of the characters corresponding to the received contents.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a device for detecting the remaining amount of roll paper in an apparatus using roll paper.

It is another object of the present invention to provide a method of displaying the remaining amount of roll paper for displaying the remaining amount of the roll paper in the apparatus using the roll paper.

It is still another object of the present invention to provide a roll paper remaining amount sensing device for sensing an initial value of roll paper in an apparatus using roll paper.

It is still another object of the present invention to provide a roll paper remaining amount sensing device that senses the usage amount of roll paper in an apparatus using roll paper.

According to another aspect of the present invention, there is provided an image forming apparatus including a first cam for rotating a roll paper by a driving force of a main motor, A second cam for rotating the roller by a driving force of the main motor and a second cam for rotating the roller by one side of the second cam, And a second sensor for sensing a time of one rotation of the roller and a number of times of rotation of the roller so that the initial amount of the initial roll paper is Calculating and using the number of revolutions of the rollers, calculating a usage amount of the roll paper using the number of rotations of the rollers, and calculating and displaying a current remaining amount using the calculated initial amount and amount of the roll paper. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The apparatus for detecting the remaining amount of roll paper according to an embodiment of the present invention is as shown in FIG. 2 and FIG. 3.

Referring to FIG. 2, a shaft 314 is provided, and the roll paper 210 is rotated in the opposite direction of the clock by the driving force of the main motor. The first cam 318 is coupled to an end of the shaft 314 provided on the roll paper 210. The first cam 318 is provided with at least one 1 protrusion 320 is formed, which indicates that the first cam 318 makes one rotation. The first sensor 322 is installed on one side of the first cam 318 and is interlocked with the first cam 318 so that the first cam cam rotates once Detect time. The first actuator 324 is formed on the first sensor 322 to abut the first projection 320 of the first cam cam 318 and the first cam 324, And senses one rotation of the first sensor 318 and provides it to the first sensor 322.

In addition, the roller 212 is rotated in the opposite direction of the clock by the driving force of the main motor with the shaft 326. [ Meanwhile, the second cam (cam) 328 is coupled to an end of the shaft 326 provided on the roller 212. At least one second projection 330 is formed on the second cam 328 to indicate that the second cam 328 rotates once. The second sensor 332 senses the time and the number of revolutions of the second cam (cam) 328 for one rotation. The second actuator 334 is formed on the second sensor 332 so that the second projection 330 of the second cam cam 328 abuts and the second cam 334 328 and provides it to the second sensor (332).

Referring to FIG. 4, a block diagram of an apparatus for detecting the amount of remaining roll paper according to an embodiment of the present invention will be described. Referring to FIG. 4, a first drive unit 410 includes a shaft 314 shown in FIG. A first cam 318 and a first protrusion 320. The roll paper 210 is rotated and supplied by the driving force of the main motor. The first sensor unit 412 includes the first actuator 324 and the first sensor 322 shown in FIG. 3, and the roll paper rotated by the first driving unit 410 rotates once It detects the time it takes. The second driving unit 414 includes a roller 212, a shaft 326, a second cam 328 and a second protrusion 330 shown in FIG. the roll 212 is rotated by the driving force of the main motor to supply the roll paper 210. [ The second sensor unit 416 is constituted by the second actuator 334 and the second sensor 332 shown in FIG. 3 and the roller 212 rotated by the second driving unit 414 is connected to the first sensor 334 and the second sensor 332, It detects the time it takes to rotate. The counter 418 counts the number of rotations of the roller 212 sensed by the second sensor unit 416. The control unit 420 calculates the remaining amount of the roll paper 210 according to data provided from the first sensor unit 412, the second sensor unit 416 and the counter 418. The memory unit 422 stores data having a constant value among data necessary to calculate the remaining amount of the roll paper 210, such as the radius of the rollers 212 or the thickness of one sheet of the roll paper 210. [ The display unit 424 displays the remaining amount of the roll paper 210 under the control of the controller 420.

Referring to FIG. 5, a control flow for calculating an initial amount of roll paper according to an exemplary embodiment of the present invention will be described. Calculating a rotation speed of the rollers by using a rotation time of the rollers, calculating a circumference length of the roll paper by using the rotation speed of the rollers, calculating a radius of the roll paper by using the circumference length of the roll paper, And calculating an initial amount of the roll paper by using the radius of the roll paper.

The control flow for calculating the remaining amount of the roll container according to an embodiment of the present invention will now be described with reference to FIG. 6, including the steps of sensing one revolution of the roller, incrementing the count value by 1 Calculating a usage amount of the roll paper using the count value, calculating a remaining amount of the roll paper using the usage amount of the roll paper, and displaying the calculated remaining amount of the roll paper.

Hereinafter, an operation according to a preferred embodiment of the present invention will be described in detail with reference to the above configuration.

The remaining amount of the roll paper according to the present invention can detect the initial amount of the roll paper 210 by detecting the time when the roll paper 310 rotates once and sensing the time when the roller 212 makes one revolution , The remaining amount of the current roll paper 210 can be obtained from the initial amount of the roll paper 210. In the present invention, the roll speed of the roll paper 210 and the roller 212 is the same, and the roller 212 is rotated at a constant speed.

First, a specific method of knowing the initial amount of the roll paper 210 will be described in detail with reference to FIG.

The control unit 420 detects that the roll paper 210 is replaced with a new roll paper 210 in step 510. If it is detected in step 510 that the roll paper is replaced, the controller 420 measures one rotation time of the roll paper 210 through the first sensor unit 412 in step 512. And the one rotation time of the roller 212 is measured through the second sensor unit 416. [ When the measurement of the one rotation time is completed, the controller 420 calculates the rotation speed of the roller 212 in step 514. [

The rotational speed of the roller 212 is obtained as follows.

(1) The rotational speed of the roller 212 = the circumferential length (distance) of the roller 212 / the time the roller 212 rotates once.

The r 'value is stored in the memory unit 422 because the circumferential length of the roller 212 is 2? R' (? = 3.14, r '= radius of the roller 212) It is a fixed value.

The time for one rotation of the roller 212 is such that the second projection 330 touches the second actuator 334 when the second cam cam 328 makes one rotation. The second sensor 332 senses one rotation of the roller 212 by the second sensing unit 334 and measures the time required for the one rotation to transmit the measured time to the controller 420 ). As a result, the speed of the roller 212 in equation (1) is known.

When the rotation speed of the rollers 212 is calculated according to Equation 1, the controller 420 calculates the rotation speed of the roll paper 210 by using one rotation time of the roll paper 210 measured in step 512 in step 516, Calculate the length.

The circumferential length of the roll paper 210 is calculated as follows.

(2) Rotation speed of the roll paper 210 = circumferential length (distance) of the roll paper 210 / time during which the roll paper 210 rotates once.

In Equation (2), the rotation speed of the roll paper 210 is equal to the speed of the roller 212. Therefore, the time during which the roll paper 210 makes one revolution is expressed by Equation When the cam 318 makes one rotation, the first projection 320 touches the first actuator 324. The first sensor 322 senses one rotation of the roll paper 210 by the first actuator 324 and measures the time taken for the one rotation to measure the measured time to the controller 420 to provide. As a result, the circumferential length (distance) of the roll paper 210 in Equation (2) can be known.

If the circumference of the roll paper 210 is calculated in step 516, the controller 420 calculates the radius R of the roll paper 210 in step 518.

The radius R of the roll paper 210 is calculated as follows.

(3) The circumferential length of the roll paper 210 = 2? R

If the radius R of the roll paper 210 is calculated according to Equation (3) in step 518, the controller 420 calculates an initial amount of the roll paper in step 520.

A specific method for checking the initial amount (length) of the roll paper 210 is as follows.

The length of the roll paper 210 of the initial value =

r = radius of core (216) of roll paper.

T = Thickness of one sheet of roll paper 210.

R = radius of the roll paper (210).

n = number of times the roll paper 210 is wound = (R-r) / T.

Σ means suns.

In the above equation, the initial amount of the roll paper 10 at the initial value can be known.

Phase R; The r and T values are values stored in the memory unit 422, and the R value is the value calculated in step 518.

Next, a specific method for determining the remaining amount of the roll paper 210 will be described in detail with reference to FIG.

The control unit 420 sets the count value k to 0 in order to count the number of revolutions of the roller 212 when the roll paper 210 is replaced in step 610. [ In step 612, the controller 420 senses whether the GO roller 212 rotates once through the second sensor unit 416. If the controller 420 detects one rotation of the roller 212, the controller 420 proceeds to step 614 to increment k by 1 and then proceeds to step 616. The control unit 420 calculates the remaining amount of the roll paper 210 by calculating the usage amount of the roll paper 210 in step 616. [

The amount of use of the recording apparatus 210 is calculated as follows.

The amount of use of the roll paper 210 = the circumferential length of the roller 212 (number of rotations of the roller 212)

When the usage amount of the roll paper 210 is calculated according to Equation (4), the controller 420 calculates the remaining amount of the roll paper 420 through the following equation.

As a result, if a method of calculating the remaining amount corresponding to the length of the current roll paper 210 is expressed as an equation,

&Quot; (5) "

The length of the current roll paper 210 = the initial length of the roll paper 210 - (the circumferential length of the roller 212 times the number of rotations of the roller 212).

The remaining amount calculated by the above equation is displayed on the display unit 424 in step 618. [

As a result, the user can know the remaining amount of the roll paper 210, and the user can arbitrarily determine the time point at which the roll paper 210 is short-circuited.

According to the present invention, since the remaining amount of the roll paper is detected and displayed in all the apparatuses using the roll paper, the user can accurately grasp the replacement timing of the roll paper, thereby providing a further improved service There is an effect that can be done.

Claims (8)

An apparatus for detecting a remaining amount of a roll paper, comprising: a roll paper having an axis for rotation by a driving force of a main motor; a roller for discharging the roll paper by a constant velocity movement with the roll paper; A second cam provided at an end of the roller, and a second cam which is provided at an end of the roller, and a second cam which is interlocked with the first cam in accordance with the rotation of the first cam, And a second sensor for detecting a time when the roller makes one rotation and a number of times of rotation of the roller in cooperation with the second cam in accordance with the rotation of the roller. The apparatus as claimed in claim 1, wherein at least one protrusion is formed on the first cam to indicate one rotation of the first cam. The apparatus as claimed in claim 2, wherein an actuator is formed on the first sensor so as to contact the protrusion to detect one rotation of the first cam. The apparatus according to claim 2 or 3, wherein at least one protrusion is formed on the second cam to indicate one rotation of the second cam. The apparatus as claimed in claim 4, wherein an actuator is formed on the second sensor so as to contact the protrusion to detect one rotation of the second cam. A roll paper remaining amount sensing device comprising: a first driving part for rotating a roll paper; and a second driving part for rotating the rollers, wherein the first sensor part senses a time when the roll paper makes one rotation, A second sensor section for generating a sensing signal according to one rotation of the roller, a counter for counting a sensing signal provided from the second sensor section, and a counter for counting a time for one revolution of the roll paper and the roller A control unit for calculating a remaining amount by subtracting the roll paper usage amount obtained by multiplying the value counted by the counter by the circumferential length of the roller at an initial amount of the rolled paper that has been counted by the counter and a display unit for displaying the remaining amount calculated by the control unit Characterized in that the remaining amount of roll paper is detected. A method of displaying a remaining amount of roll paper by providing a first driving part for rotating the roll paper at a constant speed, a second driving part for rotating the roller at the same speed as the roll paper, and a counter for counting the number of revolutions of the roller A first step of calculating an initial amount of roll paper according to a sensed time by sensing a time for one roll of the roll paper by the first driving unit and a time for which the rollers make one rotation by the second driving unit, A second step of counting the number of revolutions of the rollers by the 2 driving unit and multiplying the counted value by the circumferential length of the rollers to calculate an amount of use of the roll paper; And calculating and displaying a remaining amount as a difference of the usage amount calculated in the step of calculating the remaining amount of the roll paper. The method according to claim 7, wherein the initial amount of the roll paper is calculated by dividing a circumferential length of the roller by a time when the roller makes one rotation, calculating a rotation speed of the roller, Calculating a radius R of the roll paper by dividing a circumference of the roll paper by 2 pi (pi), calculating a radius R of the roll paper by dividing the circumference of the roll paper by 2 pi Dividing the difference between the radius (R) and the core radius (r) of the roll paper by the thickness (T) of the roll paper to calculate the number of turns (n) of the roll paper; And calculating the remaining amount of the roll paper according to the calculated roll paper remaining amount.