JPH0586956U - Recording paper remaining amount display device - Google Patents

Abstract

(57) [Summary] [Purpose] The remaining amount of roll paper can be calculated and displayed as a value converted into paper size. [Structure] Based on the rotation speed n detected by the rotation speed detector 1 attached to the feed roller and the diameter d of the feed roller, the paper conveyance amount πdn is measured by the measuring device 2, and the conveyance amount and the memory 4 are stored in advance in the memory 4. The remaining amount of the recording paper is calculated by the remaining amount calculator 5 as a value converted into the size of the paper from the recorded predetermined length data of the recording paper, and this is displayed on the display 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a recording paper remaining amount display device used in a facsimile machine or the like, and more particularly to a display device suitable for displaying the remaining amount of recording paper wound in a roll shape.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, recording paper (hereinafter referred to as roll paper) in which a certain length of paper is wound in a roll shape has been used in facsimile machines and printers. For example, roll paper for thermal recording or electrostatic recording, or ordinary roll paper.

Such a roll paper is attached to a predetermined holder, driven by an appropriate pressure roller and the like, and fed out by a predetermined amount and used.

In this case, it is known to display the usage status of the roll paper by using a color display or a counter. As the color display, it is known that the end of the roll paper on the paper side is marked with a red mark. In addition, a cantilever attached to the roll paper holder so that it abuts against the side surface (radial direction) of the roll paper is used to detect the roll paper diameter that decreases with the use of the roll paper, and to work with this. There is also one that mechanically displays green → yellow → red.

In the case of using a counter, a mechanical counter is installed on a roller that carries out roll paper, and the number of rotations of the roller is displayed.

[0006]

[Problems to be solved by the device]

 With such a conventional display method, only a very rough remaining amount of the roll paper can be known, and for example, it is impossible to know a concrete numerical value of how many sheets remain in the A4 size.

An object of the present invention is to solve the above problems and provide a recording paper remaining amount display device capable of displaying the remaining amount of roll paper as a specific numerical value converted into the size of the paper.

[0008]

[Means for Solving the Problems]

 The recording paper remaining amount display device according to the present invention includes a rotation speed detector attached to a recording paper feed roller wound around a predetermined length, and a recording paper feed amount based on the rotation speed detected by the rotation speed detector. A measuring device that calculates the amount, and a remaining amount calculator that calculates the remaining amount of the recording paper into a value converted into the size of the paper from the calculation result of this measuring device and the predetermined length data of the recording paper that is stored in advance. , And a display for displaying the output of the remaining amount calculator.

[0009]

[Action]

 In the present invention, the transport amount of the paper is measured by the measuring device from the rotation speed of the rotation speed detector and the diameter of the feed roller, and the transport amount of the paper is measured from this transport amount and the predetermined length data of the recording paper which is recorded in advance. The remaining amount is calculated by the remaining amount calculator as a value converted to the size of the paper, and this is displayed on the display.

[0010]

【Example】

 FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, 1 is a rotation speed detector attached to a roll paper feed roller or the like, 2 is a measuring instrument, and is based on the output of the rotation speed detector 1 and the roll diameter of the feed roller to which the rotation speed detector 1 is attached Calculate the feed amount (use amount) of roll paper. A paper detector 3 detects the width of the paper (size of paper) and the diameter of the roller paper used. Reference numeral 4 is a memory in which the width of the roll paper to be used, the diameter of the roll paper, the length of the wound paper, and the like are stored in advance. Reference numeral 5 is a remaining amount calculator that calculates the remaining amount of roll paper from the output of the measuring device 2 and the output of the paper detector 3 and the data of the memory 4 with a specific numerical value. Reference numeral 7 is a display for displaying the remaining amount of roll paper based on the calculation result of the remaining amount calculator 5. Reference numeral 6 is a control unit for controlling the whole.

FIG. 2 is a diagram illustrating a specific example of the rotation speed detector 1. The roll paper 8 is installed in a holder such as a facsimile device or a printer device (not shown), and the recording paper 9 is nipped by the feed rollers 10 and 11 and conveyed to a recording unit (not shown) in the direction of arrow A. The feed roller 11 is provided with a rotation speed detector 1 such as a rotary encoder for detecting the rotation speed of the feed roller 11. Since the recording paper 9 is sandwiched by the feed rollers 10 and 11, the recording paper 9 and the outer peripheral surfaces of the feed rollers 10 and 11 operate without slipping. Therefore, from the diameter d of the feed roller 10 and its rotational speed n. The transport amount (πdn) of the sheet 9 is calculated. When a plurality of types of recording paper 9 are used, they are provided for each.

FIG. 3A is a specific example of the paper detector 3, which is an example using a photocoupler. Reference numerals 20, 21, 22 are photocouplers, which are installed according to the paper width of the paper type used by the light emitting device such as an LED and the light receiving device such as a photodiode. Then, the paper 9 is set so as to pass between the light emitter and the light receiver. For example, the photo coupler 22 is cut off only when the paper width is B4 plate, the photo coupler 21 is cut off when the paper width is A4 plate and B4 plate, and the photo coupler 20 is cut off when the paper width is B5 plate, A4 plate and B4 plate. Set to As a result, if the signal "1" is output when the photocouplers 20 to 22 are cut off, the outputs of the photocouplers 20 to 22 and the paper width correspond to each other as shown in FIG. 3B. Is possible. Regarding the diameter of the roll paper 8, a photocoupler may be installed in the longitudinal direction of the roll paper 8 or it may be detected by an appropriate method, and a switch may be set at the time of installation.

FIG. 4 is a specific example of a data table for recording paper in the memory 4. Since the roll paper 8 is usually standardized and prepared, the data table of the memory 4 is used as a set of data such as paper width, roll diameter, paper length, and cut length as initial values. It is set as some information.

Next, the operation of this embodiment will be described. Here, a facsimile machine (hereinafter, referred to as FAX) which can use two kinds of recording sheets of A4 size and B4 size will be described as an example.

First, when the A4 size roll paper (large) is set, the paper detector 3 detects it. That is, the photocouplers 20 and 21 are cut off and "110" is output. Further, the fact that the roll paper 8 is “large” is set by, for example, instructing with the switch installed in the paper detector 3. Next, when the FAX starts receiving, the roll paper 8 is conveyed, and at the same time, the feed rollers 10 and 11 rotate, and the rotation number detector 1 detects this. Based on the number of revolutions n detected by the number of revolutions detector 1, the measuring instrument 2 uses the preset diameter d of the feed roller 11 and length L _{1 of} the recording paper conveyed along with the FAX reception. Is calculated as L ₁ = πdn and sent to the control unit 6. This length L ₁ is the amount used for reception.

In the control unit 6, according to the output of the paper detector 3, [paper width] = A4 from the data table of the memory 4, [roll diameter] = larger, [paper length] = 12 m, [cut length] = 29. 7 mm is read out, and this is set in the remaining amount table prepared in the memory 4 as shown in FIG. 6, for example. Here, in the table of FIG. 6, [sheet number] is calculated from [sheet length] and [single sheet length], and the remaining 80 sheets are set.

Next, the remaining amount calculator 5 calculates the [used number] from the output length L ₁ from the measuring device 2 and the [cut length], and further, [remaining amount] in the remaining amount table of FIG. ] Is subtracted from [Number of used sheets] to calculate the value. This is updated and set by the control unit 6 as a new [remaining amount] in the table of FIG. 6 (FIG. 7). At the same time, the control unit 6 displays the contents of the remaining amount table of FIG. 6 in the memory 4 on the display 7 as shown in FIG.

When the B4 version roll paper 8 is additionally installed, the B4 version information is added and managed in addition to the A4 version information. The operation of the B4 version is the same as that of the A4 version described above. The state of the remaining amount table at this time is shown in FIG. 8 and the display state is shown in FIG. 5 (b).

[0019]

[Effect of the device]

 As described above, according to the present invention, the rotation number detector attached to the feed roller of the recording sheet wound for a predetermined length and the recording sheet feed from the rotation number detected by this rotation number detector. A measuring device that calculates the amount, and a remaining amount calculator that calculates the remaining amount of the recording paper into a value converted into the size of the paper from the calculation result of this measuring device and the predetermined length data of the recording paper that is stored in advance. Since it consists of a display that displays the output of this remaining amount calculator, the remaining amount of recording paper can be displayed as a specific numerical value. Therefore, it becomes easier to grasp the number of receivable images and the convenience is improved.

Further, there is an advantage that the preparation of the spare sheet can be done systematically and promptly.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a perspective view showing a specific example of a rotation speed detector in the embodiment of FIG.

3A and 3B are an explanatory view showing a specific example of the paper detector in the embodiment of FIG. 1 and a view showing the relationship between the operation of the photocoupler and the paper width for explaining the operation thereof.

FIG. 4 is a diagram showing a specific example of a data table regarding recording sheets of a memory in the embodiment of FIG.

5 is a diagram showing a display example of a display device in the embodiment of FIG.

FIG. 6 is a diagram showing an example of remaining amounts set in a remaining amount table in a memory in the embodiment of FIG.

FIG. 7 is a diagram showing an example of the remaining amount set in a remaining amount table in the memory in the embodiment of FIG.

FIG. 8 is a diagram showing an example of the remaining amount set in a remaining amount table in the memory in the embodiment of FIG.

[Explanation of symbols]

 1 Rotation speed detector 2 Measuring instrument 3 Paper detector 4 Memory 5 Remaining amount calculator 6 Controller 7 Display 8 Roll paper 9 Recording paper 10 Feed roller 11 Feed roller 20 Photo coupler 21 Photo coupler 22 Photo coupler

Claims (1)

[Scope of utility model registration request] 1. A rotation speed detector attached to a feed roller for recording paper wound around a predetermined length, and a measuring device for calculating the feed amount of the recording paper from the rotation speed detected by this rotation speed detector. , A remaining amount calculator for calculating the remaining amount of the recording paper with a value obtained by converting the remaining amount of the recording paper into the size of the paper from the calculation result of the measuring device and the predetermined length data of the recording paper stored in advance A remaining amount display device for recording paper, comprising: a display for displaying the output of the container.