JPH04153155A - Paper sheet transport force control device - Google Patents

Abstract

PURPOSE:To enable stable paper sheet transport operation by constituting so as to select a transport force suitable for paper sheets when paper sheets of different thickness or paper sheets for special use are used. CONSTITUTION:A sensor 1 detects the thickness of continuous paper sheet 10 to be transported. Then, a control part 2 receives the signal from this sensor 1 and judges the thickness of the continuous paper sheet 10 thereby, and outputs a control signal 11 to a motor 4. The motor 4 which receives the control signal 11 from the control part 2 rotates by an angle corresponding to the transport force designated by the control signal. The rotation of this motor 4 causes a cam 5 which is directly connected thereto to be rotated and a lever 6 is driven by means of the cam 5. The operation of this lever 6 causes the deflection of a plate spring 7 to be changed. The change in the deflection of this plate spring 7 causes a change in the contact pressure of a feed roller 8 with a feed roller 9, resulting in the required transport force.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a paper conveyance force control device for controlling the conveyance force of continuous paper in a printer using continuous paper, and in particular, the present invention relates to a paper conveyance force control device for controlling the conveyance force of continuous paper in a printer using continuous paper. The present invention relates to a paper conveyance force control device for controlling paper conveyance force when special paper is used.

[Conventional technology]

The paper transport section of a conventional printer that uses continuous paper always transports the paper with a constant transport force, and the transport force remains unchanged even when paper of different thickness or special paper is used.

[Problem to be solved by the invention]

As mentioned above, conventional printers always transport all types of paper with a constant transport force (C), so when the paper is thick, the transport force is insufficient, and when the paper is thin, the feed is insufficient. It has the disadvantage that the holes tear and cause paper jams.

[Means to solve the problem]

The paper conveyance force control device of the present invention includes: a sensor that detects the thickness of continuous paper; a control unit that receives an output signal from the sensor, determines the thickness of the continuous paper, and outputs a control signal;
a motor that changes a rotation angle in accordance with the control signal from the control unit; a cam that is rotated by the motor; a lever that is driven by the cam; and a deflection amount that is varied by the lever to convey the continuous paper. It is equipped with a leaf spring that changes the contact pressure with the feed roller.

Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
FIG. 3 is a front view showing details of section A in the figure.

In FIGS. 1 and 2, a sensor 1 detects the thickness of continuous paper 10 being conveyed. The control unit 2 receives the signal from the sensor 1, determines the thickness of the continuous paper 10 based on the signal, and outputs a control signal 11 to the motor 4. The motor 4 receives the control signal 11 from the control unit 2 and rotates by an angle corresponding to the conveying force instructed by the motor 4 . As the motor 4 rotates, a cam 5 directly connected thereto rotates, and the cam 5 drives the lever 6. When the lever 6 is operated, the leaf spring 7 changes its deflection amount. This change in the amount of deflection of the leaf spring 7 changes the contact pressure between the feed rollers 8 and 9, resulting in a desired conveying force. When using special paper, the operator can control the desired conveying force by specifying the rotation angle of the motor 4 from the panel 3.

〔Effect of the invention〕

As explained above, the paper conveyance force control device of the present invention has the following features:
In printers that use continuous paper, when paper of different thickness or special paper is used, it is possible to select the transport force that is suitable for the paper, which has the effect of ensuring stable paper transport operation. Moreover, there is also the effect of preventing paper jams due to tearing of the feed holes.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
FIG. 3 is a front view showing details of section A in the figure. 1...Sensor, 2...Control unit, 3...
...Panel, 4...Motor, 5...
Cam, 6... Lever, 7... Leaf spring,
8・9... Foot roller, 10-9.・、. Continuous paper, 11... Control signal.

Claims (1)

[Claims] A sensor that detects the thickness of continuous paper; a control unit that receives an output signal from the sensor, determines the thickness of the continuous paper, and outputs a control signal; and the control signal from the control unit. A motor that changes the rotation angle, a cam rotated by the motor, a lever driven by the cam, and a plate that changes the amount of deflection by the lever to change the contact pressure with the feed roller that conveys the continuous paper. A paper conveyance force control device comprising a spring.