JPH0873091A - Roll paper feeding device - Google Patents

Abstract

PURPOSE: To remove or lighten the winding tendency of a roll paper sheet by utilizing a cutter mechanism for cutting the roll paper sheet by an image processing device equipped with the cutter mechanism. CONSTITUTION: A cutter mechanism 15 is equipped with a lower side rail 41 and an upper side rail 43. A holding part which is not shown on the figure is arranged in a reciprocatingly movable manner between these rails. In the holding part, a disc-shaped cutter 44 and the second guide roller 73 are arranged. When the holding part moves in reciprocation, the disc-shaped cutter 44 makes slide contact with a fixed cutter 42, and the paper sheets 33A and 33B are cut. In the shift of the holding part, the second guide roller 73 shifts on the second rail part 41A. At this time, the part in the vicinity of the rear end of the paper sheet 33B is pushed onto the R(roundness) of the second rail part 41A. Accordingly, the winding tendency of the paper sheet 33B is corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper feeder used in an image processing apparatus such as a copying machine, a facsimile machine and a printer, and more particularly to a roll paper feeder having a cutter for cutting the roll paper. Regarding paper equipment.

[0002]

2. Description of the Related Art In image processing apparatuses such as copiers and printers, roll paper is often used, especially when recording large or long sizes. Further, in a facsimile machine, roll paper is often used in a particularly small machine in order to secure the reliability of paper feeding and to miniaturize the paper feeding unit. Many roll paper feeders that feed roll paper cut the paper into a desired size inside the device in consideration of handling the paper after recording.

By the way, when using roll paper,
As the diameter of the outermost circumference becomes relatively small, the curl of the fed paper becomes remarkable. by this,
Jam (paper jam) on the paper transported in the image processing device
Could occur. Further, in an image processing apparatus that records an image using a photoconductor drum, the curled paper may come into incomplete contact with the surface of the drum, causing a problem in recording the image. Further, if the curl remains on the paper after recording, the storage state in the discharge tray is not good, and a new paper break may occur, which often causes a problem in the subsequent handling. Therefore, a mechanism or a device for taking a roll paper curl has been conventionally proposed.

FIG. 8 shows a main part of a roll paper feeding device disclosed in Japanese Patent Publication No. 2-36222. In this apparatus, the driving roller 101 is fed to the tension roller 102 and the feeding roller is fed to the tension roller 103.
Are transposed. The roll paper 105 is fed in the direction of the arrow 106, passes between the drive roller 101 and the feeding tension roller 102 as shown by the dotted line, and further passes between the guide plate 107 provided with the R and the decurling roller 108. , Here, it is bent in the direction opposite to the curl, and the curl is taken. Then, it passes between the drive roller 101 and the delivery tension roller 103 and is delivered to, for example, a recording unit (not shown) in the apparatus.

[0005]

In the roll paper feeding device having such a structure, the driving roller 101, the feeding tension roller 102, the feeding tension roller 103, and the decurling roller 108 are necessary. Further, since the driving roller 101 needs to be driven by a driving source (not shown), the mechanism for taking a curl is not only complicated and expensive, but also a considerable space is required for this mechanism. .

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image processing apparatus having a cutter mechanism for cutting roll paper, by using this mechanism to take a curl of the roll paper and reduce the curl of the roll paper. To provide.

[0007]

According to the invention as set forth in claim 1, (a) a rail member having a rail longer than the width of the roll paper to be cut, and (b) at least the width along the rail. Fixed blades arranged only in a straight line,
(C) A holding member arranged so as to be reciprocally movable relative to the rail by a distance longer than the width described above, and (d) a fixed blade and a blade arranged on the outer periphery of the holding member are slidably attached to the holding member. A movable blade, and (e) a compensating member which is arranged parallel to the rail on the rail member and whose cross section is a compensating surface having a predetermined curvature in a direction for compensating the curl of the roll paper,
(F) The roll paper feeding device is provided with a pressing member that presses the roll paper along the compensation surface of the compensation member when the holding member reciprocates.

That is, the invention according to claim 1 relates to a roll paper feeding device provided with a cutter mechanism for cutting roll paper by a fixed blade and a movable blade. In this roll paper feeder, a fixed blade is attached to a rail member having a rail. The holding member reciprocates along the rail, and at this time, the moving blade attached to the holding member slides on the fixed blade to cut the roll paper. The rail member is provided with a compensating member which is arranged in parallel with the rail and whose cross section is a compensating surface having a predetermined curvature in a direction for compensating the curl of the roll paper. Roll paper is pressed along the compensation surface. Therefore, when the holding member moves forward or backward by the rail to cut the roll paper, the surface of the roll paper in the vicinity of the cutter is correspondingly pressed against the correction surface, and the curl is corrected. Will be done.

According to the second aspect of the invention, (a) a rail member having a rail longer than the width of the roll paper to be cut, and (b) a rail member linearly arranged along the rail by at least the width described above. The fixed blade, (c) the holding member that is reciprocally arranged with respect to the rail by a distance longer than the width described above, and (d) the fixed blade and the blade arranged on the outer periphery of the holding member are in sliding contact with each other. A disk cutter rotatably arranged on the holding member, and a (e) rail member arranged in parallel with the rail, the cross section of which serves as a compensating surface having a predetermined curvature in a direction for compensating the roll paper curl. The roll paper feeding device is provided with a compensating member and (f) a compensating roll having a curvature opposite to that of the compensating surface and being in rolling contact with the compensating surface of the compensating member via roll paper when the holding member reciprocates.

That is, a second aspect of the present invention relates to a roll paper feeding device having a cutter mechanism that cuts roll paper by a fixed blade and a disk cutter as a movable blade. In this roll paper feeder, a fixed blade is attached to a rail member having a rail. The holding member reciprocates along the rail, and at this time, the disk cutter attached to the holding member slides into contact with the fixed blade to cut the roll paper. The rail member is provided with a compensating member which is arranged parallel to the rail and whose cross section is a compensating surface having a predetermined curvature in a direction for compensating the curl of the roll paper. A compensating roll having a curvature opposite to that of the compensating surface is brought into rolling contact with the compensating surface of the compensating member via the roll paper. Therefore,
When the holding member is moved forward or backward by the rail to cut the roll paper, the surface of the roll paper in the vicinity of the cutter is sequentially pressed against the correction surface correspondingly, and the curl is corrected. It will be.

According to the third aspect of the present invention, (a) a rail which is longer than the width of the roll paper to be cut and whose cross section is a compensating surface having a predetermined curvature in a direction for compensating the curl of the roll paper; (B) a fixed blade linearly arranged along the rail by at least the width described above, and (c) a holding member arranged reciprocally by a distance longer than the width relative to the rail. (D) A disk cutter rotatably arranged on the holding member so that the fixed blade and the blade arranged on the outer periphery of the fixed blade are in sliding contact with each other, and (e) Reciprocation of the holding member having a curvature opposite to that of the compensation surface. The roll paper feeding device is provided with a compensation surface of the compensation member and a compensation roll that is in rolling contact with the roll paper during movement.

That is, a third aspect of the present invention relates to a roll paper feeding device provided with a cutter mechanism that cuts roll paper by a fixed blade and a disc cutter as a movable blade. In this roll paper feeder, a fixed blade is arranged on the rail. The holding member reciprocates along the rail, and at this time, the disk cutter attached to the holding member slides into contact with the fixed blade to cut the roll paper. The rail has a correction surface having a predetermined curvature in the direction in which the cross section thereof adjusts the curl of the roll paper,
At the time of cutting the roll paper, a compensation roll having a curvature opposite to that of the compensation surface comes into rolling contact with the compensation surface via the roll paper. Therefore, when the holding member moves forward or backward by the rail to cut the roll paper, the surface of the roll paper in the vicinity of the cutter is correspondingly pressed against the correction surface, and the curl is corrected. Will be done.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 shows an essential part of a copying system using a roll paper feeder according to an embodiment of the present invention. This copying system includes a copying machine 1 for copying a document.
1 and a sorter 12 for sorting copied sheets
It consists of The copying machine 11 includes a supply roll 14. The supply roll 14 is a roll of paper, and depending on the apparatus, a plurality of rolls having different widths are set at the same time. In this embodiment, for the sake of simplicity of explanation, the case where one supply roll 14 is set is shown. The selected paper among the roll paper fed from the supply roll 14 is cut into a predetermined size by the cutter mechanism 15, and is conveyed on the paper conveyance path 16 to be transferred to the photosensitive drum 17 and the transfer corotron 1.
Pass between 8. The photoconductor drum 17 forms an electrostatic latent image by an electrostatic latent image forming means (not shown), and the developing device 1
9 develops this to create a toner image. This toner image is transferred onto the sheet by the action of the transfer corotron 18. The electronic copying machine 11 is provided with a manual feed tray 21, and the sheets manually fed from the electronic copy machine 11 merge in the middle of the transport path 16 and the toner image is transferred in the same manner.

The toner remaining on the photosensitive drum 17 after the transfer of the toner image is removed by the cleaning device 23. Further, the sheet on which the toner image has been transferred passes through the fixing device 24, and the toner image is fixed there. The sheet of paper after fixing is discharged from the electronic copying machine 11 via a discharge roll (not shown) and fed into the sorter 12.

The sorter 12 is designed to store the sorted papers in a plurality of bin trays 26. However, predetermined papers such as papers that are not the object of sorting are placed on the top tray of the sorter body. It is designed to be collectively discharged to 27. This top tray 2
A pair of discharge rolls 28 and 29 for discharging sheets are arranged in front of the sheet 7. Naturally, a plurality of sorters 12 may be connected to the electronic copying machine 11.

FIG. 2 shows a main part of a roll paper feeding device in this copying system. The roll paper feeding device 31 is a device that supplies the paper 33 wound around the paper tube 32 of the supply roll 14 for copying. The supply roll 14 is rotatably held by two guide plates 34 and 35. A pair of feed rollers 36 and 37 are arranged near the outlets of these guide plates 34 and 35.
The sheet 33 unraveled from the supply roll 14 is fed leftward in the figure by these feed rollers 36 and 37, passes through the cutter mechanism 15, and is cut at a predetermined position at this time. The cut sheet is guided by the guide plate 38 arranged on the exit side of the cutter mechanism 15 and is conveyed along the conveying path 16 shown in FIG. 1 toward the photosensitive drum 17 (FIG. 1).

As shown in FIG. 2, the cutter mechanism 15
Is a disc-shaped cutter 4 that is movably arranged in a direction perpendicular to the paper surface by a fixed blade 42 fixed to a lower rail 41, a lower rail 41 and an upper rail 43 facing the lower rail 41.
It is equipped with 4. The blade of the disc-shaped cutter 44 is in sliding contact with the fixed blade 42, so that the sheet 33 is cut. However, FIG. 2 shows only the cutter mechanism 15 for cutting the sheet 33.

FIG. 3 is a side view of the cutter mechanism of this embodiment. In the cutter mechanism 15, a holding portion 51 is arranged in a space formed by a lower rail 41 and an upper rail 43, which are longer than the maximum width W for cutting the paper, so that the holding portion 51 can reciprocate in the directions of arrows 52 and 53. The disc-shaped cutter 44 is rotatably held by the holding portion 51. A pair of pulleys 54 and 55 is fixed to the holding portion 51 with 56. The drive side pulley 54 is the drive shaft 5 of the motor.
A driving force is applied from 7 through two rollers 58 and 59. Then, when the drive shaft of the motor rotates counterclockwise, the pair of pulleys 54 and 55 rotate clockwise accordingly, and the holding portion 51 moves in the direction of arrow 52. When the holding part 51 moves to the vicinity of the pulley 55, the right side limit switch 61 detects this and stops the driving of the motor. At this time, the fixed blade 42
The cutting position of the sheet by the disc-shaped cutter 44 is on the right side of the right end position shown as the maximum width W for cutting the sheet.

On the contrary, when the drive shaft of the motor rotates in the clockwise direction, the pair of pulleys 54, 55 rotates in the counterclockwise direction, and the holding portion 51 is moved in the direction of arrow 53. When the holding portion 51 moves to the vicinity of the pulley 54,
The left limit switch 62 detects this and stops driving the motor. At this time, the fixed blade 4
The position where the sheet is cut by 2 and the disc-shaped cutter 44 is on the left side of the left end position shown as the maximum width W at which the sheet is cut. As described above, when the motor rotates in any one direction and moves until one of the two limit switches 61 and 62 is turned off and the other is turned on, the maximum width W at which the paper is cut is disc-shaped. The cutting portion of the cutter 44 moves and cutting is performed. Then, in this state, the holding unit 51 stands still until the timing of the next cutting, and at that timing, the holding unit 51 moves in the opposite direction and the next cutting of the sheet is performed in the same manner.

FIG. 4 specifically shows a cross section of the cutter mechanism. The lower rail 41 of the cutter mechanism 15 has a substantially concave cross section, and the fixed blade 42 is fixed to the side surface of the recessed portion on the paper feed side. The upper rail 43 has a substantially U-shaped cross section. The holding portion 51 has a first guide roller 71 rotatably arranged on an upper portion thereof, and a second guide roller 73 rotatably arranged on a lower portion thereof in parallel with a rotation axis 72 of the disc-shaped cutter 44. The third guide roller 7 is provided on the side plate portion 51A facing the disc-shaped cutter 44.
5 is also rotatably arranged.

Of these, the first guide roller 71 is in rolling contact with the first rail portion 43A bent downward from the upper end portion of the upper rail 43 by a predetermined length. Further, the second guide roller 73 is in rolling contact with the second rail portion 41A of the lower rail 41 in which a predetermined R is formed. Furthermore, the third
The guide roller 75 is in rolling contact with the upper surface of the horizontal third rail portion 43B that constitutes the lower end portion of the upper rail 43. In this way, the holding portion 51 is provided with the first to third guide rollers 71, 7
By rolling contact with the upper rail 43 or the lower rail 41, the rollers 3 and 75 are movable with respect to the fixed upper rail 43 and lower rail 41.

FIG. 5 is a view of the cutter mechanism as seen from the side where the sheet enters. First to third guide rollers 71, 7
It can be seen that three and 75 are respectively arranged on both sides of the holding portion 51.

In such a roll paper feeder, the paper 33 unraveled from the supply roll 14 shown in FIG.
It passes between the pair of feed rollers 36 and 37, passes over the fixed blade 42 of the cutter mechanism 15 and over the second rail portion 41A shown in FIG. 4, and is arranged on the guide plate 38 shown in FIG. The sheet is conveyed in the direction of the photosensitive drum 17 shown in FIG. This paper 3
Fixed blade 4 of cutter mechanism 15 by a predetermined distance from the tip of 3
When it passes above 2, the conveyance is stopped and the cutting is performed at that timing. At this time, as shown in FIG.
1 moves in the direction of arrow 52 or the direction of arrow 53, and at this time, the sheet 33 is cut at the position where the disk-shaped cutter 44 contacts the fixed blade 42.

FIG. 6 shows the behavior of this sheet at the cut portion. A portion 33A on the left side (paper feed side) in the drawing from the cut portion of the paper 33 cut by the fixed blade 42 and the disc-shaped cutter 44 remains at that position until the next paper feed is resumed. On the other hand, in the portion 33B on the right side of the cutting position in the drawing, the second guide roller 73 and the rail portion 41A are pressed against each other in the vertical direction at positions before and after being cut by the disc-shaped cutter 44. Second guide roller 73 and rail section 4
The opposing areas of 1A are shaped so as to form a circle having a predetermined radius. As shown in FIG. 2, the sheet 33 unraveled from the supply roll 14 has a tendency to be rounded into a U shape, but the area where the second guide roller 73 and the rail portion 41A face each other has an upside-down shape. Has become. Therefore, the trailing edge of the sheet 33B that has passed between the second guide roller 73 and the rail portion 41A has no curl or is significantly corrected. Further, the other portion of the paper 33B is not pressed by the second guide roller 73 itself, but the rail portion 41 having the R is formed.
Since it is conveyed while being pressed against A to some extent, the curl is greatly reduced.

The sheet 33B with the curl thus eliminated or reduced is conveyed while being guided by the guide plate 38 (FIG. 2), but the curl is more stable than the conventional one. become. In addition, the photosensitive drum 17
At the portion (FIG. 1), the transfer of the toner image onto the paper 33B is performed well.

Modification

FIG. 7 specifically shows a cross section of a cutter mechanism according to a modification of the present invention. The same parts as those in FIG. 4 are designated by the same reference numerals, and the description of these parts will be omitted as appropriate. In the cutter mechanism 15C of this modified example, one pressing roller 81 is rotatably attached coaxially with the disc-shaped cutter 44. The pressure contact roller 81 has a larger diameter than the second guide roller 73 shown in FIG. 4, and the width of the roller is also wide. Further, the roller surface of the pressure roller 81 rollingly in contact with the rail portion 41D of the lower rail 41C that faces the lower rail 41C is recessed to match the curvature of the rail portion 41D.

Also in the cutter mechanism 15C of this modification, the sheet is cut by the fixed blade 42 and the disc-shaped cutter 44.
Then, since the pressing roller 81 arranged at the same position as the cutting position in the width direction of the paper presses the paper against the rail portion 41D, the curl is eliminated or reduced as in the previous embodiment. Since the width of the roller surface of the pressure contact roller 81 is wide, the paper is corrected with a relatively wide width, and it is the same without providing two rollers or rollers for taking a curl as in the previous embodiment. You can get effective results.

In the embodiment or the modified example, two or one roller or roller for taking a curl of the paper is arranged, but the number of these rollers is not limited to these examples. Further, in the embodiment and the modified example, other rollers are arranged in the holding part to be movable with respect to the rail, but various modifications can be made to the mechanism of the holding part performing the same operation. Of course. In addition, instead of the second guide roller 73 or the pressure contact roller 81, for example, an elastic member may be used to press the paper against the rail portions 41A and 41D.

[0031]

As described above, claims 1 to 3 are as described above.
According to the invention described above, the sheet is pressed by the pressing member or the roller along the adjusting surface of the adjusting member, and the sheet is also cut at this time. Therefore, there is an advantage that not only the curl of the roll paper can be corrected at the time of cutting, but also the cutting of the paper itself can be performed stably.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a main part of a copying system using a roll paper feeding device according to an embodiment of the present invention.

FIG. 2 is a front view showing a main part of a roll paper feeding device in this copying system.

FIG. 3 is a side view showing a cutter mechanism of the present embodiment.

FIG. 4 is a cross-sectional view specifically showing the cross section of the cutter mechanism of the present embodiment.

FIG. 5 is a side view of the cutter mechanism according to the present embodiment as seen from the side where a sheet enters.

FIG. 6 is an explanatory diagram showing the behavior of the paper at the cutting location in the cutter mechanism of the present embodiment.

FIG. 7 is a sectional view of a cutter mechanism according to a modified example of the present invention.

FIG. 8 is an explanatory diagram of a roll paper feeding device for preventing a roll paper curl disclosed in the related art.

[Explanation of symbols]

15 ... Cutter mechanism, 33 ... Paper, 41 ... Lower rail, 4
1A ... 2nd rail part, 42 ... Fixed blade, 43 ... Upper rail, 44 ... Disc-shaped cutter, 51 ... Holding part, 73 ... 2nd guide roller

Claims (3)

[Claims] 1. A rail member in which a rail longer than the width of the roll paper to be cut is arranged, a fixed blade linearly arranged along the rail by at least the width, and a width larger than the width with respect to the rail. A holding member arranged so as to be reciprocally movable for a long distance, a movable blade attached to the holding member so that the fixed blade and a blade arranged on the outer periphery of the fixed blade are in sliding contact, and the rail member is parallel to the rail. And a cross-section of which is a compensating member having a predetermined curvature in a direction for compensating the curl of the roll paper, and the roll paper along the compensating surface of the compensating member when the holding member reciprocates. A roll paper feeding device comprising a pressing member for pressing. 2. A rail member in which a rail longer than the width of the roll paper to be cut is arranged, a fixed blade linearly arranged along the rail by at least the width, and a width larger than the width with respect to the rail. A holding member arranged reciprocally for a long distance, a disc cutter rotatably arranged on the holding member so that the fixed blade and a blade arranged on the outer periphery of the fixed blade slidably contact, and the rail member. A compensating member which is arranged in parallel with the rail and whose cross section is a compensating surface having a predetermined curvature in a direction for compensating the curl of the roll paper; and a reciprocating movement of the holding member having a curvature opposite to the compensating surface. A roll paper feeding device, comprising: a compensation surface of the compensation member and a compensation roll that is in rolling contact with the roll paper during movement. 3. A rail which is longer than the width of the roll paper to be cut and whose cross section is a compensation surface having a predetermined curvature in a direction to compensate the curl of the roll paper, and at least the rail along the rail. A fixed blade linearly arranged by the width, a holding member arranged reciprocally with respect to the rail by a distance longer than the width, and the fixed blade and the blade arranged on the outer periphery thereof are in sliding contact with each other. A disc cutter rotatably disposed on the holding member, and a compensating roll having a curvature opposite to that of the compensating surface and rolling contact with the compensating surface of the compensating member via the roll paper when the retaining member reciprocates. A roll paper feeding device comprising: