JP3155417B2 - Roll paper feeding method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing machine and a processing machine in which a roll paper must be transported straight, and particularly to a roll paper suitable for use in a transfer of a copying machine or a plotter. The present invention relates to a feeding method and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus such as a copying machine, as a means for preventing skew of roll paper, correction is performed by abutting the leading end of a cut roll paper against a registration roller. . That is,
A registration roller is provided at an appropriate position on the front side of the image forming apparatus, and a clutch for driving and stopping the registration roller is connected to the registration roller. A movement detecting means for detecting the leading end of the roll paper is provided on the upstream side of the registration roller, and a control device for turning on / off the clutch at a predetermined timing after detecting the roll paper by the movement detecting means is provided. . With this, the leading end of the roll paper is abutted against the stopped registration roller to correct the direction of the roll paper,
Thereafter, the registration roller is driven to hold the roll paper.

[0003]

The conventional means is based on the premise that the leading edge of the roll paper is cut at a right angle. Therefore, in the case of cut paper that has been cut at an accurate right angle in advance, accurate conveyance can be performed by setting the conveyance direction to be constant, but cutting using paper wound in a roll shape is possible. However, for roll paper used, the accuracy of the perpendicularity of the cutting device is directly determined in the transport direction. However, as a cutting device for cutting roll paper, it is common to cut while transporting roll paper in order not to reduce the processing speed,
It is difficult to cut the leading or trailing edge of the roll paper at an exact right angle. Therefore, as described above, according to the means for abutting the leading end against the registration roller to restrict the angle of the gripping to the registration roller, the skew is rather increased when using a roll paper that does not have a right angle. This creates an easy state.

[0004] It is an object of the present invention to provide a roll paper feeding method and a roll paper feeding method in which skew does not occur even if a low-precision cutting device that can cut only at a low squareness is used. And

[0005]

A first conveyance roller, a cutting device, and a movement detection means for detecting the movement of the roll paper from the supply side of the roll paper to the downstream side in the roll paper conveyance path. A second transport roller is sequentially disposed, and when the leading end of the roll paper is gripped by the second transport roller, the first transport roller is stopped to feed the roll paper. stop, and the second conveying roller to start again the rotation from by the slip of the first conveying rollers between the roll paper. Then, the tip of the roll paper defining a timing so as to when the leading end of the roll paper after the lapse of the predetermined time since the detection is incorporated in addition to the second conveying roller by movement detection means. Further, the roll paper holding unit for holding the roll paper, a first conveying roller disposed in proximity to the roll paper holding unit, and a cutting device provided downstream of the conveyance rollers, the b Movement detecting means for detecting the movement of the roll paper, a second transport roller provided in proximity to the supply destination of the roll paper and having a frictional force on the roll paper smaller than the first transport roller, A timer circuit for designating a period of time from when the roll paper is detected by the movement detecting means to when the roll paper is held by the second transport roller, and based on an output from the timer circuit, the first transport roller is temporarily stopped. The device is constituted by the stopping means for stopping the operation.

[0006]

[Action] Once even those tip of Russia Lumpur paper low perpendicularity is incorporated in addition to the second conveying roller, with stopping the transport of the roll paper to the first transport roller in this state is stopped Since the second transport roller continues to rotate, it slips between the roll papers, so that even if the roll paper is held in a bent state by the second transport roller, it slips in the correct direction during the slip. It is straightened and transported straight.

[0007]

An embodiment of the present invention will be described with reference to the drawings. First, the roll paper 1 wound in a roll shape is set in the roll paper supply unit 2. The supply destination of the roll paper 1 is the image forming apparatus 3.
Are the parts to be supplied. Such a roll paper supply unit 2
A transport path 4 for transporting the roll paper 1 is formed between the image forming apparatus 3 and the image forming apparatus 3 by means such as a guide plate.

On the roll paper supply section 2 side of the transport path 4, a first transport roller 5 composed of a pair of rollers is disposed close to the roll paper supply section 2. The first transport roller 5 is connected to a driving unit 7 such as a motor via a clutch 6 serving as a stopping unit. Next, a cutting device 8 positioned at a position near the first transport roller 5 is provided downstream of the first transport roller 5 . On the downstream side of the cutting device 8, sensor 9 serving as a movement detecting means for detecting the leading end or the trailing end b Lumpur sheet 1 is provided. A timer circuit 10 is connected to the sensor 9, and the timer circuit 10 is connected to the clutch 6.

A second transport roller 11 composed of a pair of rollers is disposed immediately before the image forming apparatus 3 on the transport path 4. The frictional force of the second transporting roller 11 on the roll paper 1 is set to be smaller than the frictional force of the first transporting roller 5. Of course, the peripheral speed of the first transport roller 5 and the peripheral speed of the second transport roller 11 are the same. The drive unit 12 is connected to the second transport roller 11. The driving means 12 may be shared with the driving means 7 by being connected to the second transport roller 11 without the intervention of the clutch 6.

In such a configuration, when a sheet feeding command is received by a signal from a control unit (not shown), the driving unit 7
12 starts and the first and second transport rollers 5 and 11 are driven. As a result, the roll paper 1 is transported through the transport path 4. When the sensor 9 detects the leading end of the roll paper 1 cut by the cutting device 8, the timer circuit 10 starts. The time until the timer circuit 10 times out is set to the transport time until the leading end of the roll paper 1 is gripped by the second transport roller 11 from the position of the sensor 8. Therefore, the timer circuit 10
When the time is up, the output is transmitted to the clutch 6, whereby the driving force from the driving means 7 is not given to the first transport roller 5, so that the first transport roller 5
Stops . Even in this condition, the second conveying roller 1
1, since the rotation of the roll paper 1 is continued, a slip occurs between the roll paper 1 and the roll paper 1. Due to the slip state, even if the roll paper 1 is bent and held by the second transport roller 11, it is corrected. And become straight. That is,
The state is the same as the transport direction of the roll paper 1 with respect to the first transport roller 5.

However, since the stop state of the first transport roller 5 by the clutch 6 is set to be extremely short, the clutch 6 enters the power transmission state after the lapse of the time, and the first transport roller 5 Also start to rotate. Therefore, the roll paper 1 is transported in the transport path 4 toward the image forming apparatus 3, and in the middle of the transport, the cutting device 8 is driven by a cutting command from the control unit, and cuts the roll paper 1. Cut paper.

After that, regardless of whether the roll paper 1 is continuously fed or the feeding of one cut sheet is completed, the state in which the leading end of the roll paper 1 is held by the second transport roller 11 That is, the operation of temporarily stopping the first transport roller 5 and correcting the transport direction at the position of the second transport roller 11 is repeatedly executed.

Depending on the length of the roll paper 1 to be cut, the movement of the roll paper 1 is detected by the sensor 9 and the timer circuit 10 is started by detecting the trailing end of the roll paper 1. As means for detecting the timing when the leading end of the roll paper 1 is added to the second transport roller 11, the second transport roller 11 is used regardless of the timer circuit 10.
Means such as providing a sensor immediately before can be considered.

[0014]

As described above, the present invention detects the movement of the first transport roller, the cutting device, and the roll paper in the transport path of the roll paper from the supply side of the roll paper to the downstream side. A movement detecting means and a second transport roller are sequentially arranged ,
Stopping the first feed of the roll paper is stopped the transport rollers when the leading end of the B Lumpur paper was incorporated in addition to the second conveying roller, the slip of the second conveying rollers between the roll paper having from by to start the rotation of the first conveying roller again, even those lower tip of Russia Lumpur paper of perpendicularity can be transported in the right direction to correct the conveying direction, Further, since the tip of the roll paper defining a timing so as to when the leading end of the roll paper after the lapse of the predetermined time since the detection is incorporated in addition to the second conveying roller by the movement detecting unit, even structurally simple can do conveying direction correction easily, the front
A roll paper holding unit for holding the serial roll paper, a first conveying roller disposed in proximity to the roll paper holding unit, and a cutting device provided downstream of the first conveying roller, before
A movement detecting means for detecting a movement of kilometers Lumpur paper, a second conveying roller is weak frictional force to the roll paper than the first conveying roller provided close to the inlet portion of the roll paper A timer circuit that specifies a time period from the detection of the roll paper by the movement detection means to the time when the roll paper is held by the second transport roller, and the first transport roller based on an output from the timer circuit. by configuring the device by a stop means for temporarily stopping, without intended cutting device with high accuracy, thereby the conveying direction of the roll paper coincides with the direction at the position of the first conveying roller It can be, thereby, the actual a simple structure that is conveyed also be in a state where the roll paper is bent incorporated in addition to the second conveying roller is corrected in the right direction during slip in half straight An effect such as can be.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll paper 2 Roll paper supply part 3 Image forming apparatus (supplied part) 4 Transport path 5 First transport roller 6 Clutch (stop means) 8 Cutting device 9 Sensor (movement detection means) 10 Timer circuit 11 Second transport roller

Claims (3)

(57) [Claims] A first transport roller, a cutting device, a movement detecting means for detecting the movement of the roll paper, and a second transport in a roll paper transport path from a supply side of the roll paper to a downstream side thereof. a roller successively arranged, the tip of Russia Lumpur paper is a first conveying roller is stopped when it was incorporated in addition to the second conveying rollers stop feeding of the roll paper, the second conveying roller roll paper feeding method is characterized in that so as to start from by slipping rotation of the first conveying roller again between the roll paper. 2. The method according to claim 1, wherein a point in time when a predetermined time has elapsed after the leading end of the roll paper is detected by the movement detecting means is a point in time when the leading end of the roll paper is gripped by the second transport roller. The method for feeding roll paper according to claim 1. A roll paper holding unit for holding the roll paper;
A first conveying roller disposed in proximity to the roll paper holding unit, and a cutting device provided downstream of the conveying roller, a movement detecting means for detecting a movement of said B Lumpur paper, said A second transport roller provided in proximity to the roll paper supply section and having a lower frictional force on the roll paper than the first transport roller; and A roll circuit comprising: a timer circuit for designating a time until being held by the second transport roller; and a stop means for temporarily stopping the first transport roller based on an output from the timer circuit. Paper feeder.