JPH06328897A - Rolled sheet cutting method for sheet driving plotter - Google Patents

Abstract

PURPOSE:To effectively drop a cut sheet from above a sheet guide after cutting a drafted region of a rolled sheet by a cutter. CONSTITUTION:After drafting is finished, a drafted region of a rolled sheet 32 is cut from the sheet 32 of a held side interposed between a driving roller 22 and a pressure roller 24 by a cutter 14 cooperated with a printing element head. After cutting, a controller drives the roller 22 to feed the sheet 32 of the held side plural times slowly longitudinally in a range of a specific width of several mm, an edge of the sheet of a cut side is pushed forward by the edge of the sheet 32 of the held side, and the sheet of the cut side is dropped from a sheet guide 6. When the sheet is not dropped, the sheet 32 of the held side is relatively slowly superposed on the sheet of the cut side, then fed forward, applied by a forward moving force to the sheet of the cut side by a frictional force of the sheet 32 of the held side to the sheet of the cut side, thereby dropping it from the guide 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper cutting method for a paper drive type plotter having a paper cutting mechanism.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 62-178194 discloses that
A plotter with a cutter device for cutting a sheet by engaging a cutter unit with an image line head is disclosed. In addition to this, many plotters provided with a cutter device are disclosed.

[0003]

In the paper drive type plotter, the printing is performed while the paper moves back and forth on the paper guide (platen). Therefore, static electricity is generated between the paper and the paper guide. Therefore, even if the paper is cut with a known cutter device, the paper on the cutting side adheres to the paper guide and remains on the paper guide due to static electricity, and the adhered paper is used in the next drawing operation. There was a problem that it collided with the paper that was driven back and forth, and this affected printing. It is an object of the present invention to ensure that the sheet on the cutting side falls from the sheet guide.

[0004]

In order to achieve the above object, the present invention provides a roll paper whose roll portion is rotatably supported at a lower portion of a machine body and is drawn out onto a paper guide fixed to the machine body.
The roll paper in the pulled-out portion is held by a drive roller and a pressure roller, and the drive roller is rotated in the forward and reverse directions to drive the pull-out portion of the roll paper in the front-back direction on the paper guide, while the image line is drawn. In a paper-driven plotter in which a head is moved in a direction that traverses the roll paper drawer, and a drawing is performed within a predetermined range of the drawer, in a drawn area of the roll paper drawer, And a process of cutting from the hold-side roll paper sandwiched by the pressure roller with a cutter, and after the cutting, the hold-side roll paper is relatively slowly moved back and forth once or several times within a predetermined width range. Feeding, pushing the edge of the paper on the cutting side forward with the edge of the roll paper on the hold side, and dropping the paper on the cutting side from the paper guide. That.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 2, reference numeral 2 is a sheet drive type plotter, and a sheet guide 6 is fixedly mounted on the machine body 4. Reference numeral 8 denotes a Y-rail erected on the machine body, to which a drawing head 10 is movably attached in association with a Y-axis driving device. The drawing head 10 is
The writing pen 12 is held so that it can be raised and lowered. The drawing head 10 has a cutter unit 1 provided with a cutter 14.
6 is attached. A box 18 is provided on one side of the machine body 4, and a controller is arranged in the box 18. The controller is connected to a host computer via an interface.

Inside the paper guide 6, an underlay roller 20 and a drive roller 22 are rotatably arranged in association with an X-axis drive device, and the upper portions of the rollers 20 and 22 are the paper guides. It is arranged in the slit formed in 6. A pressure rotor 24 is rotatably supported by an arm attached to the Y rail 8 so as to be movable up and down, and the pressure roller 24 can elastically contact the drive roller 22 by the elastic force of a spring. It is composed. The paper guide 6 has a cut groove 26 formed in the Y-axis direction for receiving the cutting edge of the cutter 14. Plotter leg 2
The roll paper 32 is attached to the holding portion rotatably provided on
Of the roll portion 32a is detachably held,
The holding portions on the side of the legs 28 and 30 that hold both ends of 2a are connected to a motor (not shown) controlled by the controller.

Reference numeral 34 is a paper sensor for detecting the presence / absence of paper, and is arranged on the paper support surface of the paper guide 6. In order to perform drawing on the roll paper 32 by the plotter, first, the roll paper 32 is pulled out from the roll portion 32a of the roll paper 32 held between the legs 28 and 30, and the pulled roll paper 32 is driven by the drive roller 22. It is inserted between the pressure roller 24 and the pressure roller 24 and placed on the paper guide 6. The plotting operation of the plotter is performed under the control of the controller based on the plotting data transferred from the host computer to the controller of the plotter. When the plotting operation of the plotter is started, the pressure roller 24 makes elastic contact with the drive roller 22 from above the roll paper 32, and the paper guide 6
The upper roll paper 32 includes a drive roller 22 and a pressure roller 24.
Be held by and.

The roll paper 32 moves right and left (in the X-axis direction) on the paper guide 6 in FIG. 3 by the forward and reverse rotation of the drive roller 22.
Sent to. On the other hand, the pen 1 held by the drawing head 10
2 is controlled up and down with respect to the roll paper 32 on the underlay roller 20, and the roll paper 32 is moved along the Y rail 8.
Then, the pen 12 performs a predetermined drawing for one frame on the roll paper 32.

Next, the roll paper cutting operation of the plotter will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG. When the drawing operation for one frame is completed (step 1), the controller rotates the drive roller 22 to position the cut portion of the roll paper 32 on the cut groove 26 of the paper guide 6 (step 2). Next, the controller drives the drawing head 10 along the Y rail 8 and controls the cutter 14 of the cutter unit 16 to move up and down to cut the roll paper 32 along the cut groove 26 by the cutter 14. This cutting operation first raises the cutter 14,
Further, with the direction of the blade edge of the cutter 14 facing left in FIG. 4, the blade edge of the cutter 14 is moved from the center of the roll paper 32 to the left on a point C1 (see FIG. 4A) of 50 mm. At the position, the controller lowers the cutter 14 and presses the blade edge of the cutter 14 into the cut groove 26 through the roll paper 32.

Next, the cutter 14 is moved to the left,
The roll paper 32 is cut along the cut groove 26 to the outside of the roll paper 32 in the left direction. Then the controller
While raising the cutter 14 and rotating the direction of the blade edge of the cutter 14 to the right, the blade edge of the cutter 14 is moved to the right from the center of the roll paper 32 at a point C2 of 50 mm.
(See Figure 4B). The controller is the C2
The cutter 14 is lowered at the position, the cutter 14 is moved to the right from the C2 position as a starting point, and the roll paper 3 is moved to the right.
2 is cut along the cutting groove 26 to the outside. next,
The controller cuts the remaining 100 mm wide portion C3 of the central portion of the roll paper from right to left as shown in FIG. 4C.

By the above operation, the paper cutting operation in step 3 is completed. When cutting the roll paper 32 at one time from the edge of the roll paper 32, the cut-off side paper 32b is inclined and the last cut portion is distorted or broken or cannot be cut straight. By cutting from both ends of the roll paper 32, the left and right are balanced and the paper 32b can be cut without tilting. After the roll paper is cut, if the cut portion is not completely cut or the cut-side paper 32b that has been cut off remains on the paper guide 6 without falling from the paper guide 6, the upper side of the paper sensor 34 is closed, and then It becomes impossible to detect the presence / absence of paper by the operation of.

As a countermeasure against this, in step 4, the controller rotationally drives the drive roller 22 as shown in FIG. 5A, and the edge 32b 'of the cut side sheet 32b and the edge 32' of the roll sheet 32 on the hold side. Then, the roll paper 32 on the hold side is reciprocally moved back and forth several times with a width of several mm relatively slowly so that the paper 32b on the cut side falls from the paper guide 6. This action is for cut paper 3
Consideration is also given to the case where the cut edge of 2b is hard to fit in the cut groove 26 and the cutting-side sheet 32b does not fall from the sheet guide 6. By slowly moving the roll paper 32 on the hold side back and forth, the edge 32b ′ of the cut-side paper 32b cut
Is pressed by the edge 32b ′ of the remaining roll paper 32 on the hold side, the paper 32b on the cut side drops from the paper guide 6.

Next, in step 5, the controller determines whether or not the paper sensor 34 is not covered with paper, and when recognizing that the paper is not covered, the paper cutting operation is ended. In step 7, when the controller recognizes that the detection portion of the paper sensor 34 is blocked by the paper, the controller sends the roll paper 32 on the hold side by about 100 mm in front of the paper guide 6 in step 6 (see FIG. 5B). This operation is performed by cutting the cut paper 32b.
And a case where the roll paper 32 on the hold side held by the drive roller 22 and the pressure roller 24 is overlapped with each other without the edges 32b ′ and 32 ′ touching each other in the operation of step 4, The friction of the paper gives a moving force in the dropping direction to the cutting-side paper 32b to try to drop the paper 32b, and the roll paper 32 on the hold side is moved relatively slowly.

When the controller confirms the state of the paper sensor 34 in step 7 and recognizes that the cutting side sheet 32b has dropped, the sheet cutting operation is ended. In step 7, when the controller confirms by the paper sensor 34 that the cutting-side sheet 32b has not dropped yet, the controller determines in step 8 that the width of the roll side 32 on the hold side is several mm. Reciprocating, high speed,
In addition, it is performed several times with high acceleration (see FIG. 8C). The high-speed front-back drive in step 8 takes into consideration the case where the cut-side paper 32b is in a half-cut state, and the high-speed front-back drive of the hold-side roll paper 32 causes the cut-side paper 32b.
Holds the roll paper 32 on the hold side even if it is half cut.
And is shaken off from the paper guide 6. Next, the controller returns the roll paper 32 on the hold side to the original position, that is, about 100 mm behind the paper guide 6, and checks the paper sensor 34 (step 9).
At this point, if the paper 32b on the cut side falls and the paper sensor 34 detects that there is no paper, the controller ends the paper cutting operation (see FIG. 5D). If the paper 32b on the cutting side has not fallen from the paper guide 6, the operations from step 4 to step 9 are repeated three times according to the judgments in steps 9 and 10, and the paper 32b on the paper sensor 34 still has "presence". If so, the controller determines that the paper cutting operation is an error (step 1).
2). In steps 10 and 11, N is the number of operations and K is an arbitrary value, which is set to 3 in this embodiment.

In step 9, the paper sensor 3
When it is determined that the cutting-side sheet 32b exists on the sheet 4, the controller adds 1 to the value of N. Step 11
Determines whether N matches K and, if affirmative, proceeds to step 12. As a result of the above operation, if the cut-side paper 32b does not fall from the paper guide 6, an error is made in step 12, but in this case, it is known that the cut-side paper 32b is not cut.
By prohibiting the subsequent paper detection operation by the controller, it is possible to shift to the next drawing operation without stopping the operation of the plotter and continuously operate the plotter.

In step 3, before the central portion of the roll paper 32 is cut, the roll paper 32 is once moved back and forth to bite or cut into the cut grooves 26 at the cut portions on both sides. When cutting the roll paper on the cutter mat instead of 26,
By removing the bite of the cut portions on both sides of the roll paper 32 into the cut mat, the efficiency of the pushing operation of the cut side paper 32b in step 4 can be increased.
In the present embodiment, the cutter 14 held by the cutter unit 16 is used together with the drawing head 10 to move the cutter 14 on the paper guide 6 in the Y-axis direction to cut the roll paper 32. Stocker storage box 36 of plotter 2 without providing unit 16 (see FIG. 2)
A plotter is used in which a plurality of writing pens and cutter pens are detachably held in the rotary stocker arranged in the above, and the pens are automatically exchanged between the rotary stocker and the drawing head 10. You may do it. When this plotter is used, the roll paper 32 is cut on the underlay roller 20 in the Y-axis direction by a cutter pen that moves along the underlay roller 20.

[0017]

As described above, according to the present invention, the paper on the cutting side can be surely dropped from the paper guide after cutting the roll paper after the drawing of the predetermined range on the roll paper is completed. There is an effect that it does not affect the drawing operation.

[Brief description of drawings]

FIG. 1 is a flowchart showing an operation of a plotter.

FIG. 2 is an external view of a sheet drive type plotter.

FIG. 3 is an explanatory sectional side view of a sheet drive type plotter.

FIG. 4 is an explanatory diagram of a roll paper cutting operation.

FIG. 5 is an operation explanatory diagram for swinging a cut sheet from a sheet guide.

[Explanation of symbols]

 2 Plotter 4 Machine 6 Paper guide 8 Y-rail 10 Drawing head 12 Pen 14 Cutter 16 Cutter unit 18 Box 20 Underlay roller 22 Drive roller 24 Pressure roller 26 Cut groove 28 Leg 30 Leg 32 Roll paper 32a Roll 32b Cut Side paper 34 Paper sensor 36 Stocker storage box

Claims (2)

[Claims] 1. A roll paper rotatably supported on the lower part of the machine body is drawn out onto a paper guide fixed to the machine body, and the drawn roll paper is held between a drive roller and a pressure roller. Then, the drive roller is rotated in the forward and reverse directions to drive the pull-out portion of the roll paper in the front-back direction on the paper guide, while the drawing head is moved in a direction crossing the pull-out portion of the roll paper, In a paper-driven plotter designed to draw within a predetermined area of the set, a cutter cuts the drawn area of the roll paper drawer from the roll paper on the hold side held by the drive roller and pressure roller. After the cutting, the roll paper on the hold side is fed relatively slowly after the cutting within a predetermined width range once or several times, and at the edge of the roll paper on the hold side. A roll paper cutting method comprising a process of pushing an edge of a cutting-side sheet forward and dropping the cutting-side sheet from the sheet guide. 2. When the paper on the cutting side does not fall from the paper guide in the process of feeding the roll paper on the hold side relatively slowly back and forth within a predetermined width range, the roll paper on the hold side for a predetermined length is relatively Slowly stacking on the cutting-side paper and feeding it forward, and by the frictional force of the roll paper on the hold side to the cutting-side paper, a forward moving force is applied to the cutting-side paper, and by this moving force, The roll paper cutting method for a paper drive type plotter according to claim 1, further comprising a process of moving the cutting-side paper forward and dropping it from the paper guide.