JPS6166667A - Printer - Google Patents

Abstract

PURPOSE:To obtain a printer which does not require manual operation of moving and adjusting a printing paper feeding unit by providing a unit driving mechanism which receives a printing paper width sensing signal and moves and drives the printing paper feeding unit in the direction of the paper width to the position corresponding to the width of the paper. CONSTITUTION:A printing paper 1 is inserted on a guide 9 from the rear of a printer, and a width of the printing paper 1 is detected by a position sensing mechanism 19 with printing paper guides 16a and 16b. A signal is inputted to a horizontal driving mechanism of a printing paper feeding unit 2a, 2b, and the paper feeding unit 2a, 2b is moved to the position to comply with the fixed width of the printing paper without requirements of a manual operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing device in which the structure of a paper feed drive mechanism is devised.

[Conventional technology]

A conventional printing device is shown in FIGS. 9-12. In the figure, the printing paper l, which has a sprocket wheel, is first passed between the platen 3 and the guide 9 in the direction of the arrow, then between the platen 3 and the print head 4. The paper is set in the through paper transport units (2a, 2b) and sent out to the rear of the apparatus again. As shown in FIG. 11, the paper conveying units 2a and 2b have four feed bins that match the sprocket wheels of the printing paper machine, and use these feed bins to move the printing paper l by a predetermined amount. Paper transport (2) 2a and 2b are
As shown in FIG. 9, the paper is conveyed through a timing belt 7, a gear train 8, a timing belt 7, a gear train 8, and a controlled rotation type of a motor 6 as a drive source.

2b to drive the feed bin 4. This type of printing device also has an ink ribbon 5, etc., but these are not directly related to the present invention and will therefore be omitted. Here, the first
In Figure 1, paper transport (22) 2m, 2b is the drive shaft l
It is held by the O1 driven shaft U and can be moved left and right by opening and closing the lock lever. FIG. 12 shows the situation when the printing paper 1 is set on the paper transport units 2a and 2b. In this type of configuration, the operator manually positions the paper conveyance unit for printing paper l of various paper widths, and also finely adjusts the printing paper width manually when replacing the printing paper l. There is.

[Problems to be solved]

Therefore, there is a drawback that the adjustment work for the paper conveyance units 2a and 2b is performed on both sides, and operators have been demanding improved operability.

[Means for solving problems]

The present invention has solved the above-mentioned problems, and includes a paper transport unit that transports printing paper having a sprocket wheel using the sprocket wheel, and a paper transport unit that detects the width of the printing paper and outputs a signal. The apparatus includes a width detection mechanism, and a unit drive mechanism that receives the signal and drives the paper transport unit to move in the width direction of the paper to a position corresponding to the width of the paper.

That is, in the present invention, a printing paper width detection mechanism and a drive mechanism for a paper transport unit are provided in the printing paper transport mechanism section, and when the detection mechanism detects the paper width, it outputs a signal, and the unit drive unit that receives this signal outputs a signal. The mechanism is driven to adjust the movement of the paper transport unit to a point corresponding to the printing paper width, eliminating the need for manual movement adjustment of the paper transport unit and improving operability. be.

〔Example〕

Next, one embodiment will be described with reference to FIGS. 1 to 8.

Fig. 1 is a perspective view of an embodiment of a paper transport unit of a printing device according to the present invention, Fig. 2 is a perspective view showing the principle of a piezo motor, and Fig. 3 is a perspective view of a rotary piezo motor assembled to the above paper transport unit. This is a partially cutaway side view of the state, and in each figure,
The same parts as in FIGS. 9 to 12 are given the same reference numerals.

In Figures 1 and 3, left and right paper conveyance unit 2a, 2b
The rotary piezo motors 13a and L3b for driving are fixed to the driven shaft 11, which is threaded on the circumference, and the rotor 24 of the rotary piezo motor (see Fig. 3). are interlocked. The driven shaft 7) 11 is fixed to plates on both sides (not shown). In addition, a sensor 1 for positioning is installed on the paper transport system 2a and 2b.
5a and 15b are fixed, and paper transport units 2a and 2b are fixed.
The scale [
The structure is such that each position is determined by four slits. In the diagram illustrating the principle of the piezo motor in Figure 2, 24
' is 1. A rotor having a surface with a high coefficient of friction, 23I an elastic body pressed against the rotor U', and 26I a piezo element that generates a surface wave. The surface wave generated by the piezo element 26' is transmitted on the surface of the elastic body n' as shown. This surface wave causes the rotator 24' to move in a direction opposite to the direction in which the waves travel.

Utilizing this principle, the piezo element 26 attached to the elastic body 4 in Fig. g3 is driven by a drive circuit (not shown) to generate a surface wave between the elastic body and the rotor U. . The trochanter has the configuration shown in FIG. 4 or 5, and is pressed against an elastic body n by a spring 5, and is rotationally driven by the surface waves. The rotary piezo motors 13a and L3b constituted by these components are part of the paper conveyance unit 2a.

2b, and is driven left and right on the driven shaft H by the rotation of the rotor U and by the screw engagement with the driven shaft U.

Next, FIG. 6 shows an embodiment of a detection mechanism for detecting the printing paper width. Paper guide 16 & as a paper width detection mechanism corresponding to printing paper processing.

16b is provided. The paper guides 16a and 16b have optical sensors inside to detect the edge of the printing paper. Note that 17 is a microswitch which will be described later. FIG. 7 shows an embodiment of automatic position detection of a paper guide. In the figure, a paper guide 16a.

16b has the same functional structure as paper conveyance equipment 2a and 2b, and has a motor 1 that allows movement from side to side.
By combining six or more paper transport units 2a, 2b and paper guides 16a, 16b, each of which is composed of a position detection mechanism 19 (8 and optical 7-ner), the following printing paper drive mechanism is possible. Become. In FIG. 8, when printing paper l is inserted onto guide 9 from the rear of the printing device, paper guides 16a and 16b detect the paper width of printing paper l by position detection mechanism 1.
9 and sends a signal to the horizontal drive mechanism of the paper transport unit 2a, 2b through a control unit (not shown). Accordingly, the paper transport unit 2a, 2b moves the manual hand to a position that matches the width of the set printing paper. Move automatically without any need. The printing paper machine uses feed rollers 20 and 21.
Excessive paper is conveyed between the guide 9, platen 3 and print head 4 (2a, 2b) by controlling the amount of paper to a length that can be applied by the sprocket wheel. The amount of tweed of the printing paper l at this time is determined by the microswitch 17. The operator can manipulate the printing paper by moving the paper transport units 2m and 2b from side to side and simply applying the printing paper l to the feed pins 22 of the paper transport units 2a and 2b without worrying about the tension of the printing paper 1. The setting to the device is completed. This mechanism can be used for many types of printing paper, especially for printing paper of different widths.
This is particularly effective for users who use the system frequently, as it improves operability.

In addition, in the above, the work of setting the sprocket wheels of the printing paper machine on the paper transport unit 2) 2a, 2b was left to the hands, but it is now possible to extend the guide 9I in Fig. 8 and move the printing paper l onto the paper transport unit 2) 2a, 2b), it becomes possible to automatically load the printing paper l.

The rotary piezo motors 13a and L3b generate higher torque at lower speeds than conventional motors, and are also smaller and lighter, making it possible to provide a highly efficient and simple printing device.

Accordingly, the paper guide 16a serves as a paper width detection mechanism that detects the printing paper width.

16b, a driven shaft 11 as a drive unit for positioning the paper conveyance units 2a and 2b according to signals from the detection mechanism, and rotating piezo motors L3a and 13b.
By providing this, there is no need to manually adjust the positioning of the paper transport units 2&, 2b), thereby improving operability.

〔Effect of the invention〕

As explained above, the present invention includes a printing paper conveyance mechanism section,
A printing paper width detection mechanism and a drive mechanism for the paper transport unit are installed. When the detection mechanism detects the paper width, it outputs a signal, and the unit drive mechanism that receives this signal is driven to move the paper transport unit to the printing paper width. Since the paper transport unit is moved to the corresponding position and adjusted, there is no need to manually adjust the movement of the paper transport unit, thereby improving operability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of a paper transport unit of a printing device according to the present invention, Fig. 2 is a perspective view showing the principle of a piezo motor, and Fig. 3 is a perspective view of a rotary disk piezo motor assembled to the paper transport unit. Partially cut side view of the state, Figures 4 and 5
The figures are a front view of various rotors of the rotary piezo motor, FIGS. 6 and 7 are a plan view and a cross-sectional side view of the printing paper width detection mechanism of the above device, and FIG. 8 is a side view of the printing device. 9 and 10 are respectively a plan view and a side view of a conventional printing device, FIG. 11 is a plan view of its paper conveyance unit, and FIG. 12 is a perspective view showing movement adjustment work of the paper conveyance unit. It is. - Print paper 2a, 2b - Paper transport unit 3 - Platen 4 - Print head 5 - Back case 6 - Paper feed motor 7 - Timing belt 8 - Gear system 9. 9', 9'...Guide l
12-Lock lever 13a, L3b-Rotary piezo motor 14-Scale 15a, 15b-Detection sensor 16a, 16b-Paper guide 17-Micro switch 18- - Motor 19 - Position detection mechanism addition, 21... Feed roller

Claims (2)

[Claims] (1) A paper transport unit that transports printing paper having a sprocket wheel using the sprocket wheel; a paper width detection mechanism that detects the width of the printing paper and outputs a signal; and a paper width detection mechanism that detects the width of the printing paper and outputs a signal; 1. A printing device comprising: a unit drive mechanism that moves and drives a paper conveyance unit in the width direction of the paper to a position corresponding to the width of the paper. (2) The unit drive mechanism includes a threaded shaft extending in the width direction of the paper, and a rotary piezo motor fixed to the paper transport unit and whose rotor is screwed into a screw of the shaft. A printing device according to claim 1, characterized in that: