JP2926553B2 - Automatic loading mechanism for rolled paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic loading mechanism for rolled paper, and more particularly to an automatic loading mechanism for rolled paper used in a printer.

[0002]

2. Description of the Related Art An automatic paper feed mechanism which can be used by simply loading a roll of paper into a recording paper holder of a printer by providing a mechanism for finding and separating the leading edge of the roll of paper is disclosed in, for example, There is a technique disclosed in JP-A-59-164746.

[0003] A conventional roll-sheet automatic loading mechanism will be described in detail with reference to the drawings.

FIG. 14 is a side view showing a conventional example.
A mark is printed on the leading end of the roll paper 100. 1
The roll paper 100 loaded on the pair of roll paper drive rollers 114 is rotated counterclockwise, and when the sensor 116 detects the mark at the leading end, the separation guide 115 moves to a predetermined position. When the leading end of the separation guide 115 enters between the outermost periphery of the roll paper 100 and the next periphery, the leading end of the roll paper 100 can be escaped.
Since 00 is rotating, its leading end is fed along the guide 109 to a position between the platen roller 105 and the thermal head 104.

When the leading end of the roll paper 100 passes through the sensor 103, the platen roller 105 and the discharge roller 107 rotate, the rotation of the roll paper drive roller 114 stops, and the separation guide 115 returns.

[0006] Platen roller 105 and thermal head 1
04, the leading end of the roll paper 100 is
6, It is transferred to the discharge roller.

[0007]

The above-described conventional roll paper auto-loading mechanism has a drawback in that it cannot use other than roll paper on which marks are printed.

[0008]

According to a first aspect of the present invention, there is provided an auto-loading mechanism for a roll-shaped paper, which rotates the roll-shaped paper and rotates the front of the roll-shaped paper faster than the peripheral speed of the roll-shaped paper. By pressing the peeling roller against the roll-shaped paper, the difference between the peripheral speed of the roll-shaped paper and the peripheral speed of the peeling roller induces peeling of the outermost winding of the roll-shaped paper, thereby forming a mountain shape. To detect the leading edge of the rolled paper.

In a second aspect of the present invention, in the first aspect of the present invention, the auto-loading mechanism for the roll-shaped paper is configured to rotate the roll-shaped paper for a predetermined distance after detecting the leading end of the roll-shaped paper. A roll-shaped paper auto-loading mechanism according to a third aspect of the present invention, in which a leading end is guided between the peeling roller and the roll-shaped paper driving roller, is arranged such that the peeling roller is moved in the width direction of the roll-shaped paper in the first aspect. Place in the center.

In a fourth aspect of the present invention, in the second aspect of the present invention, the roll-shaped paper auto-loading mechanism may be configured such that the leading end of the roll-shaped paper is guided between the peeling roller and the roll-shaped paper driving roller. When guiding the leading end of the paper sheet to the clamp roller, in order to guide the leading end of the roll-shaped paper to a paper guide below the peeling roller, the roll is pressed with the peeling roller pressed against the roll-shaped paper sheet. By rotating the roll paper in the opposite direction, the leading end of the roll paper is prevented from entering between the peeling roller and the roll paper.

According to a fifth aspect of the present invention, in the automatic loading mechanism for a roll-shaped sheet according to the first aspect, the peeling roller is driven by a belt wound in a cross shape and is generated between the roll-shaped sheet and the peeling roller. The peeling roller is prevented from escaping from the rolled paper due to the applied frictional force.

[0012] In a sixth aspect of the present invention, in the automatic loading mechanism for roll-shaped paper according to the fourth aspect, the means for pressing the peeling roller against the roll-shaped paper includes a main balance weight for pressing the peeling roller against the roll-shaped paper. An auxiliary balance weight for controlling the peeling roller pressing force when the diameter of the rolled paper changes due to consumption of the paper.

According to a seventh aspect of the present invention, there is provided a roll paper auto-loading mechanism comprising: a pair of roll paper driving rollers for placing roll paper and rotating the paper in a first direction (counterclockwise); A transport motor to be rotated, a peeling roller arm and a weight arm swinging up and down around a fulcrum by a retract motor, and a peeling roller provided at a tip of the peeling roller arm and rotating in a second direction (clockwise). A main weight fixed to the tip of the weight arm and lifting the peeling roller arm by its weight to press the peeling roller against the roll paper; and a main weight attached to the peeling roller arm and swinging the peeling roller arm. A paper guide that moves following the operation, and is attached near the tip of the paper guide, Configured to include a release sensor and the sensor actuator detects a portion near the tip becomes a mountain shape of the roll paper because it was turned by releasing roller, the.

[0014]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic side view showing one embodiment of the present invention. The roll paper auto-loading mechanism shown in FIG. 1 includes a pair of roll paper driving rollers 2a and 2b for placing the roll paper 1 and rotating the roll paper 1 in a first direction (counterclockwise), and a pair of roll paper driving rollers 2a and 2b. Transport motor 3 for rotating 2b
Roller arm 5 and weight arm 1 that swing up and down about a fulcrum by a retract motor
3, a peeling roller 6 provided at the tip of the peeling roller arm 5 and rotating in the second direction (clockwise), and fixed to the leading end of the weight arm 13, and lifting the peeling roller arm 5 by its weight to remove the peeling roller. 6, a main weight 14 for pressing the roll paper 1 against the roll paper 1, a paper guide 8 attached to the peeling roller arm 5, which moves following the swing operation of the peeling roller arm 5, and a paper guide 8 attached near the leading end of the paper guide 8. The sensor includes a peel sensor 7 and a sensor actuator 11 for detecting a portion where the vicinity of the leading end of the roll paper 1 becomes mountain-shaped due to being turned by the peel roller 6.

In addition to the main weight 14, the lower base 16 has a counter weight mechanism. The gravity of the counter weight 17 fixed to the tip of the counter weight arm 15 is applied to the main weight from the tip of the counter weight arm 15 by the seesaw principle. 14 works in the direction opposite to the direction of gravity. Therefore, the pressing force of the peeling roller 6 against the roll paper 1 is changed according to the change in the position of the peeling roller arm 5 due to the difference in the size of the roll paper 1. When swinging downward again, the peeling roller 6 completely retracts from the roll paper 1.

A pulley fixed to a fulcrum of the peeling roller arm 5 is driven by the transport motor 3 and the driving of the peeling roller 6 is further transmitted by a belt 19 stretched in a cross shape.

In the roll paper path route on the extension of the paper guide 8, a clamp roller 10 and a transport roller 12 driven by a transport motor are provided. The clamp roller 10 is interlocked with the swing operation of the peeling roller arm 5. I have. That is, when the peeling roller arm 5 swings upward, the clamp roller 10 opens, and when the peeling roller arm 5 swings downward, the clamp roller 10 closes to clamp the paper and become in a transportable state.

A paper detection sensor 9 is located after the clamp roller 10 and detects the presence or absence of the paper conveyed by the conveyance roller 12 and the clamp roller 10.

FIG. 2 is a top view showing details of the peeling roller shown in FIG. The peeling roller 6 is located at one central position in the width direction of the roll paper 1.

FIG. 3 is a side view showing the operation when the diameter of the roll paper shown in FIG. 1 is reduced. When the diameter of the roll paper 1 decreases, the sinking amount of the roll paper 1 increases,
The peeling roller 6 is also lowered accordingly. Accordingly, the counterweight arm 15 is tilted to the position shown in the figure, and the clockwise moment of the counterweight arm 15 is increased by the level of the counterweight arm 15 in FIG. 1, and the force by which the counter roller 18 lifts the main weight 14 is increased. Consequently, the pressing force of the peeling roller 6 acting on the roll paper 1 is reduced.

FIG. 4 is a graph showing the relationship between the diameter of the roll paper and the pressing force of the peeling roller. When the diameter of the roll paper 1 is large, the pressing force of the peeling roller 6 is increased, and when the diameter of the roll paper 1 is small, the pressing force of the peeling roller 6 is reduced.

FIGS. 5 to 13 are side views for explaining the operation of the present invention. FIG. 5 shows a state where the roll paper 1 is set on the roll paper drive rollers 2a and 2b. The peeling roller 6 is away from the surface of the roll paper 1,
In other words, it is in a clamp-off state. When an auto load command is received, the retraction motor is driven to clamp on the peeling roller 6 as shown in FIG. When the peeling roller 6 is clamped on, at the same time, the clamp roller 10 is opened in conjunction with the peeling roller 6.

Next, as shown in FIG.
a, 2b are rotated counterclockwise. On the other hand, the peeling roller 6 rotates the roll paper driving rollers 2a, 2b clockwise in both forward and reverse rotations of the roll paper driving rollers 2a, 2b.
It is driven in conjunction with the roll paper driving rollers 2a and 2b so as to rotate faster than the peripheral speed of the roll paper 2b. A peeling roller pulley 20 is fixed on the shaft of the peeling roller 6, and a belt 19 is hung from a peeling roller drive pulley 21 in a cross shape. The peeling roller drive pulley 21 is configured to rotate in the counterclockwise direction regardless of whether the transport motor 3 rotates forward or backward. The peeling roller 6 is turned clockwise while being pressed against the roll paper 1. At this time, the belt 19 receives torque from the roll paper 1 in a counterclockwise direction and cancels the torque.
Tension occurs in

The tension of the belt 19 is controlled by the release roller arm 5.
A moment is generated in the counterclockwise direction around the fulcrum, and the peeling roller 6 is pressed against the roll paper 1. Therefore, when the roll paper 1 is rotated counterclockwise, the outermost portion of the roll paper 1 is always slipped in a counterclockwise direction. When the roll paper 1 is further rotated counterclockwise, the leading edge 1b of the roll paper 1 eventually comes off the roll paper drive roller 2b as shown in FIG. State. A paper guide 8 is fixed to the peeling roller arm 5 and follows the swing operation of the peeling roller 6. The rolled-up portion of the roll paper 1 shown in FIG.
It is detected by the peeling sensor 7 fixed to. The fixed distance roll paper 1 is driven from the time when the peeling sensor 7 detects,
Stop driving.

FIG. 10 shows a state when the roll paper 1 is stopped. The leading end of the roll paper 1 is located between the peeling roller 6 and the roll paper driving roller 2a. Next, as shown in FIG. 11, the roll paper driving rollers 2a and 2b are driven in reverse,
The roll paper 1 is rotated clockwise to convey the leading edge 1b of the paper.
When the roll paper 1 is driven clockwise, the leading end of the roll paper 1 eventually hits the peeling roller 6 rotating clockwise and is guided below the peeling roller 6. Roll paper 1
Is continued, the leading end 1b of the roll paper is guided between the transport roller 12 and the clamp roller 10 in the open state. A paper detection sensor 9 is provided in front of the clamp roller 10, and when the guided paper is detected, the roll paper driving rollers 2a and 2b are stopped.

Next, as shown in FIG. 12, after the roll paper driving rollers 2a and 2b are stopped, the retract motor is driven to clamp off the peeling roller 6, and is retracted from the surface of the roll paper 1; The roller 10 is clamped on. As shown in FIG. 13, the roll paper driving rollers 2a and 2b are driven again to rotate the roll paper 1 clockwise and convey it to a printable position.

[0028]

The roll paper auto-loading mechanism according to the present invention has the effect of automatically feeding roll paper on which no mark is printed. In the case of roll paper on which the mark is printed, the printing place is limited to the leading edge of the roll paper. Therefore, automatic feeding can be performed only when the roll paper is new, and the leading edge of the roll paper has been consumed once. Although re-feeding (automatic paper feeding) cannot be performed, the mechanism of the present invention does not have such a restriction.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention.

FIG. 2 is a top view showing details of a peeling roller shown in FIG. 1;

FIG. 3 is a side view showing an operation when the diameter of the roll paper shown in FIG. 1 is reduced.

FIG. 4 is a graph showing a relationship between a diameter of a roll paper and a pressing force of a peeling roller.

FIG. 5 is a side view for explaining the operation of the present invention.

FIG. 6 is a side view for explaining the operation of the present invention.

FIG. 7 is a side view for explaining the operation of the present invention.

FIG. 8 is a side view for explaining the operation of the present invention.

FIG. 9 is a side view for explaining the operation of the present invention.

FIG. 10 is a side view for explaining the operation of the present invention.

FIG. 11 is a side view for explaining the operation of the present invention.

FIG. 12 is a side view for explaining the operation of the present invention.

FIG. 13 is a side view for explaining the operation of the present invention.

FIG. 14 is a side view showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll paper 2a, 2b Roll paper drive roller 3 Transport motor 5 Release roller arm 6 Release roller 7 Release sensor 8 Paper guide 9 Paper detection sensor 12 Transport roller 13 Weight arm 15 Counter weight arm 16 Lower base 17 Counter weight 19 Belt

Claims (7)

(57) [Claims] The roll-shaped paper is rotated by pressing a peeling roller that rotates faster than the peripheral speed of the roll-shaped paper against the front end of the roll-shaped paper against the roll-shaped paper. Roll-shaped paper, wherein a difference between a peripheral speed and a peripheral speed of the peeling roller induces peeling of the outermost winding of the roll-shaped paper, and a mountain-like shape is detected at the leading end of the roll-shaped paper. Auto load mechanism. 2. The method according to claim 1, wherein after detecting the leading end of the rolled sheet, the leading end of the rolled sheet is guided between the peeling roller and the rolled sheet driving roller by rotating the rolled sheet by a predetermined distance. Item 2. An automatic loading mechanism for rolled paper according to Item 1. 3. The automatic loading mechanism for roll-shaped paper according to claim 1, wherein the peeling roller is arranged at the center of the roll-shaped paper in the width direction. 4. When the leading edge of the roll-shaped paper is guided to a clamp roller from the state where the leading edge of the roll-shaped paper is guided between the peeling roller and the roll-shaped paper driving roller, the leading edge of the roll-shaped paper is adjusted. In order to guide to the paper guide on the lower side of the peeling roller, by rotating the peeling roller in the direction opposite to the roll-shaped paper while pressing the roll-shaped paper, the leading end of the roll-shaped paper is 3. The automatic loading mechanism for roll-shaped paper according to claim 2, wherein the automatic loading mechanism prevents the paper from entering between the peeling roller and the roll-shaped paper. 5. The peeling roller is driven by a belt hung in a cross shape to prevent the peeling roller from escaping from the rolled paper due to a frictional force generated between the rolled paper and the peeling roller. An automatic loading mechanism for a rolled sheet according to claim 1. 6. A main balance weight for pressing the peeling roller against the rolled paper as a means for pressing the peeling roller against the rolled paper, and a main balance weight for pressing the peeled roller against the rolled paper when the diameter of the rolled paper changes due to consumption of the paper. The roll paper auto-loading mechanism according to claim 4, further comprising an auxiliary balance weight for controlling the peeling roller pressing force. 7. A pair of roll paper driving rollers for placing the roll paper and rotating the roll paper in a first direction (counterclockwise direction), a transport motor for rotating the roll paper drive roller, and a retract motor centered on a fulcrum. A peeling roller arm and a weight arm swinging up and down, a peeling roller provided at a tip of the peeling roller arm and rotating in a second direction (clockwise), and being fixed to a tip of the weight arm and having a weight thereof. A main weight that lifts the peeling roller arm and presses the peeling roller against the roll paper, a paper guide that is attached to the peeling roller arm and moves following a swing operation of the peeling roller arm, The roll was attached near the tip of the guide and was turned by the peeling roller. Rolled paper autoloading mechanism near the tip is characterized in that it comprises a release sensor and the sensor actuator detects a portion that became like a mountain, a.