JPH04323163A - Paper feeding device and paper feeding method in collator - Google Patents

Abstract

PURPOSE:To provide a paper feeding device and paper feeding method in a collator capable of neatly arranging the top ends of sheets carried from a plurality of paper feeding devices regardless of the kind of sheets to be carried. CONSTITUTION:A sheet 5 is loosened by a paper feed roller 1 and a loosening plate 2 and passed between the paper feed roller 1 and the loosening plate 2 one by one. Since the driving force of the roller 1 is transmitted through a pulley 10, a gear 15, a gear 16, and an electromagnetic clutch 12, the sheet carrying speed is relatively slow. When a paper detecting sensor 4 detects the top end of the sheet 5, the rotating force is not transmitted to horizontally carrying rollers 3a, 3b and the paper feed roller 1, so that the sheet 5 is stopped in a determined position 6. The carrying is then restarted at a determined timing to carry the sheet 5. In this case, since the driving force is transmitted to the horizontally carrying rollers 3a, 3b through the pulley 10 and an electromagnetic clutch 11, the sheet is carried at a relatively high speed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device and a paper feeding method for a collator that feeds sheets one by one from a plurality of sheet bundles, bundles these sheets, and discharges them onto a paper discharge tray, for example. The present invention relates to a paper feeding device and a paper feeding method in a collator suitable for a newspaper advertisement collating machine that folds newspaper advertisements in a newsagent's shop.

0002

2. Description of the Related Art FIG. 3 is a schematic plan view showing a conventional paper feeding device used in a newspaper advertisement collating machine. A newspaper advertisement collating machine is provided with a plurality of paper feeding devices, and the leaflets fed from each paper feeding device are bundled together to form a leaflet bundle.

[0003] The paper feed tray 31 is arranged in an inclined manner so that its leading end is located downward. A paper feed plate 32 is disposed on an extension of the paper feed tray 31 at an angle substantially the same as the inclination angle of the paper feed tray 31 . This paper feed plate 3
2 is connected to a guide plate 33 extending in the horizontal direction, and the tip of this guide plate 33 is curved downward.

A handling plate (friction plate) 34 is provided near the connection between the paper feed plate 32 and the guide plate 33. This handling plate 34 is provided on a swinging member 35, and this swinging member 35 is swingably fixed to a pedestal 36 by a shaft 35a.

Above the swinging member 35, a paper feed roller 37 is provided.
is arranged so that its peripheral surface is in contact with the separating plate 34. A rotating shaft 37a of this paper feed roller 37 is fixed to a paper feed bracket 38. The paper feed roller 37 is rotationally driven by a drive device (not shown). Further, an auxiliary paper feed roller 39 is provided on the paper feed tray 31 side of the paper feed bracket 38 . shafts 37a of the paper feed roller 37 and the auxiliary paper feed roller 39;
Pulleys 37b and 39b are disposed on 39a, respectively, and a timing belt 40 is stretched between these pulleys 37b and 39b. Then, the auxiliary paper feed roller 39 rotates as the paper feed roller 37 rotates.
It rotates drivenly at the same circumferential speed as 7.

[0006] The paper feed bracket 38 is capable of swinging around a shaft 37a of the paper feed roller 37 as a central axis. The auxiliary paper feed roller 39 is provided with a paper feed pressure adjusting means (not shown).
This presses the sheet (flyer) bundle with a predetermined paper feeding pressure. Further, on the downstream side of the paper feed roller 37 with respect to the flow direction of the sheet, a pair of transport rollers 41a,
41b are arranged facing each other in the vertical direction.

[0007] The materials of the paper feeding roller 37 and the separating plate 34 are determined in consideration of the frictional force against the sheet. That is, the frictional force between the paper feed roller 37 and the sheet and the frictional force between the handling plate 34 and the sheet are both set to be larger than the frictional force between the sheets.

Next, the operation of the conventional paper feeding device configured as described above will be explained.

First, the paper feed bracket 38 is swung around the rotating shaft 37a of the paper feed roller 37, and the auxiliary paper feed roller 39 is retracted upward. Then, the sheet bundle is placed on the paper feed tray 31. Then, the upper part of the bundle of sheets on the paper feed tray 31 slides down on the paper feed plate 32, and its leading end comes into contact with the upper surface of the swinging member 35. In this case,
Since the auxiliary paper feed roller 39 is retracted upward, the auxiliary paper feed roller 39 does not come into contact with the sheet. In addition, the swinging member 3
Since the surface of the paper feed plate 32 is inclined with respect to the upper surface of the paper feed plate 5,
The leading ends of each sheet are placed in the swinging member 3 with their positions shifted from each other.
5. Thereafter, the paper feed bracket 38 is swung to bring the auxiliary paper feed roller 39 into contact with the sheet.

Next, when the paper feed roller 37 is driven by the drive device and starts rotating, the auxiliary paper feed roller 39, which rotates following the paper feed roller 37, presses the sheet bundle with a predetermined paper feeding pressure, and Feeds out the top sheet of the stack. This sheet passes between the paper feed roller 37 and the separating plate 34, and moves between the conveyance rollers 41a and 41b. In this case, when the lower sheet comes into close contact with the uppermost sheet and reaches between the separating plate 34 and the paper feed roller 37 together with the uppermost sheet, the frictional force between the paper feed roller 37 and the sheet Since the frictional force between the sheet and the handling plate 34 is larger than the frictional force between the sheets, the sheet feeding roller 3 is attached to the lower sheet.
The conveying force of 7 is not transmitted, and this lower sheet is transferred to the handling plate 3.
Stop at position 4. Therefore, the conveyance rollers 41a, 41
The sheets are fed one by one to the b side.

[0011] By the way, newspaper advertisement leaflets are printed using various types of paper having different sizes and thicknesses. Furthermore, the printed state of the flyers also varies. For example, newspaper advertising leaflets include paper coated with anti-stick powder to prevent sticking due to undried ink, paper printed with multiple identical images on standard paper and then cut, folded in half or in quarters, etc. Papers such as pre-folded paper, thick paper, thin paper, and irregularly shaped paper are used.

In order to reliably separate and feed such various leaflets one by one, for example, the pressure contact force (separation pressure) of the separation plate 34 that comes into contact with the paper feed roller 37 is adjusted for each paper feed device. It is compatible with various types of paper by adjusting the amount as appropriate. In this case, if the separating pressure is lowered, so-called multi-feeding occurs in which two or more sheets are fed at the same time. Therefore, the handling pressure is
It is necessary to set it high enough that double feeding does not occur.

[0013] However, the difference in the handling pressure between each sheet feeding device, which is caused by setting the handling pressure for each sheet feeding device, affects the sheet conveyance timing. That is, when the separating pressure is increased, the timing of conveyance of the sheet sent out from the separating section is delayed. For this reason, the tips of the bundle of leaflets that are fed from each paper feeder are not aligned, and
For example, manual realignment may be required.

In order to avoid this, conventionally, the pressure with which the auxiliary paper feed roller 39 presses the sheet bundle is adjusted to match the conveyance timing of the sheets fed from each paper feed device. That is, when the separating pressure on the paper feed roller 37 is increased, the sheet conveyance timing is delayed as described above, so in order to correct this, the contact pressure of the auxiliary paper feed roller 39 against the sheet bundle is increased.
By advancing the timing of feeding due to increased friction, the leading edges of the sheets fed from each sheet feeding device are aligned.

[0015]

[Problems to be Solved by the Invention] However, in the paper feeding device in the conventional newspaper advertisement collating machine described above,
In order to match the leading edges of sheets fed from a plurality of paper feeders, it is necessary to individually set the adjusting sections of all the paper feeders, which is extremely complicated. Another disadvantage is that such adjustment requires skill.

The present invention has been made in view of these problems, and it eliminates the need to adjust the feeding timing for each paper feeding device, and also ensures that the leading edges of sheets fed from a plurality of paper feeding devices are aligned. It is an object of the present invention to provide a paper feeding device and a paper feeding method in a collator that can be used in a collator.

[0017]

[Means for Solving the Problems] A paper feeding device for a collator according to the present invention is a paper feeding device for a collator that feeds sheets one by one from a plurality of bundles of sheets and bundles these sheets. A paper feed roller that feeds one sheet separated from the member, a conveyance roller that transports the sheet fed from the paper feed roller, and a sheet stopping means that temporarily stops the sheet at a predetermined position. , a conveyance speed switching means for switching the circumferential speed of the conveyance roller, and the conveyance speed switching means sets the circumferential speed of the conveyance roller to a first speed until the sheet reaches the predetermined position. However, when restarting conveyance of the sheet from the predetermined position, the circumferential speed of the conveyance roller is set to a second speed higher than the first speed.

The paper feeding method for a collator according to the present invention is such that in the paper feeding method for a collator that feeds sheets one by one from a plurality of sheet bundles and bundles these sheets, one sheet is separated from the sheet bundle by a separating means. The method is determined by a step of conveying the sheet at a first speed, a step of stopping the sheet at a predetermined position, and a distance between the sheet stopping position and a gathering position of the sheets from the plurality of sheet bundles. The method is characterized by comprising the step of restarting conveyance of the sheet at a timing and conveying the sheet at a second speed higher than the first speed.

[0019]

[Operation] In the method of the present invention, first, one sheet is separated from the sheet bundle by the separating means, and this sheet is transferred to the first sheet.
convey at a speed of Next, this sheet is stopped at a predetermined position. In this case, by setting the first speed to a relatively slow speed, the sheet can be stopped at a predetermined position with good accuracy. Next, this sheet is conveyed at a second speed higher than the first speed.

In this case, by starting the conveyance at the second speed at a timing determined by the distance between the sheet stop position and the collection position where sheets from the plurality of paper feeders are collected, It is possible to always align the leading edges of the sheets fed from the paper feeding device. Therefore, in the present invention, even if the type of sheet changes, there is no need to adjust the sheet feeding timing in each paper feeding device, and it is possible to reliably align the leading edges of sheets fed from a plurality of paper feeding devices. can.

Furthermore, in the apparatus of the present invention, the sheets are separated into single sheets between the separating member and the paper feed roller. This sheet is fed by a paper feed roller and a conveyance roller. In this case, the conveyance speed switching means can switch the peripheral speed of the conveyance roller to a first speed and a second speed that is higher than the first speed. The speed switching means rotates the conveyance roller at a relatively low first speed until the sheet reaches a predetermined position.

On the other hand, the sheet stopping means temporarily stops the sheet being fed by the paper feed roller and the conveyance roller at a predetermined position. At this time, since the sheet is being fed at the relatively low first speed, it can be stopped at the predetermined position with high precision. By setting the period during which the sheet is stopped for each paper feeding device, the leading edges of the sheets fed from each paper feeding device can be aligned. This stop period may be constant regardless of the thickness, paper quality, shape, etc. of the sheet, and there is no need to adjust the sheet feeding timing depending on the type of sheet. Thereafter, conveyance of the sheet is resumed, but at this time, the speed switching means is set so that the peripheral speed of the conveyance roller becomes the second speed. Thereby, a decrease in work efficiency can be avoided.

[0023]

Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1(a) is a schematic front view showing a paper feeding device according to an embodiment of the present invention, and FIG. 1(b) is a schematic top view thereof.

The paper feed roller 1 is attached to the paper feed roller shaft 9b, and the paper feed roller shaft 9b is attached to the side plates 7a, 7b.
is supported by Further, a gear 17 is attached to this paper feed roller shaft 9b via a one-way clutch 13. Furthermore, this paper feed roller shaft 9b is connected to the electromagnetic clutch 1.
2 to the paper feed roller shaft 9a. A large diameter gear 16 is attached to this paper feed roller shaft 9a. Further, below the paper feed roller 1, a separating plate 2 is arranged as in the conventional case.

On the other hand, a horizontal conveying roller 3b is attached to the horizontal conveying roller shaft 8b, and this horizontal conveying roller shaft 8b is also supported by the side plates 7a, 7b. Further, an electromagnetic brake 14 is attached to one end of the horizontal conveyance roller shaft 8b, and the other end is connected to the horizontal conveyance roller shaft 8a via an electromagnetic clutch 11.

A gear 18 that meshes with the gear 17 is attached to the horizontal conveyance roller shaft 8a. The circumferential speed ratio between gear 17 and gear 18 is 1:1. That is, the ratio of the number of teeth of the gear 18 and the number of teeth of the gear 17 is set to be equal to the ratio of the diameter of the horizontal conveyance roller 3b and the diameter of the paper feed roller 1. Further, a pulley 1 is attached to the horizontal conveyance roller shaft 8a.
0 is attached to this pulley 10, and a drive device (
(not shown), the driving force is transmitted via a timing belt. Furthermore, this horizontal conveyance roller shaft 8
A small diameter gear 15 that meshes with the large diameter gear 16 is attached to a. The number of teeth of the small diameter gear 15 is smaller than that of the gear 18, and the number of teeth of the large diameter gear 16 is larger than that of the gear 17.

A lateral conveyance roller 3a is provided above the lateral conveyance roller 3b. The axis of this horizontal conveyance roller 3a (
(not shown) is adapted to rotate as a result of the horizontal conveyance roller shaft 8b. Further, a paper detection sensor 4 is disposed slightly downstream of the mutual contact position of the horizontal conveyance rollers 3a and 3b in the sheet flow direction, and is configured to detect the start or end of the sheet passing through the paper feeder. It has become.

The output of the paper detection sensor 4 is given to a control device (not shown). Further, this control device drives and controls the electromagnetic clutches 11 and 12, the electromagnetic brake 14, and the like.

Next, the operation of the above-mentioned paper feeding device will be explained.

First, rotational force is transmitted from the drive device to the pulley 10 via the timing belt. This results in
The horizontal conveyance roller shaft 8a rotates, and this rotational force is transmitted to the paper feed roller shaft 9a via the gears 15 and 16.

Next, in response to the operation start command signal, the control device drives the electromagnetic clutch 12.
2 is connected. Then, the rotational force is transmitted to the paper feed roller shaft 9b, and the paper feed roller 1 starts rotating. At this time, the electromagnetic clutch 11 is not connected, but the rotational force of the paper feed roller shaft 9b is transmitted to the horizontal conveyance roller shaft 8b via the gears 17 and 18. Therefore, the horizontal conveyance rollers 3a and 3b also rotate.

In this state, the horizontal conveyance roller shaft 8a
Since the rotation of the paper feed roller 1 is decelerated by the gears 15 and 16, the paper feed roller 1 rotates at a relatively slow speed, and the sheet 5 placed on the paper feed tray (not shown) is rotated between the paper feed roller 1 and the separation plate 2. To ensure that each sheet is separated and fed. This sheet 5 passes between the paper feed roller 1 and the separating plate 2, and is fed between the horizontal conveyance rollers 3a and 3b.

Next, this sheet 5 is transferred to the horizontal conveyance rollers 3a,
3b and when the paper detection sensor 4 detects the leading edge of the sheet, the control device outputs a stop signal. In response to this stop signal, the electromagnetic clutch 12 is disconnected, and the electromagnetic brake 14 is activated to instantly stop the rotation of the horizontal conveyance roller shaft 8b.

In this case, the leading edge of the sheet 5 is at a position (indicated by an arrow 6) advanced by a predetermined distance from the mutual contact position of the transport rollers 3a, 3b, and
It is held between b and stops. At this time, since the conveyance speed of the sheet 5 before stopping is relatively slow, the position of the leading edge of the sheet 5 is always constant with good accuracy.

Next, when a predetermined period of time has elapsed since the seat 5 stopped, the control device outputs an operation restart signal, and the electromagnetic clutches 11 and 12 are simultaneously connected. As a result, the rotational force of the horizontal conveyance roller shaft 8a is reduced to the horizontal conveyance roller shaft 8b.
The horizontal conveyance rollers 3a and 3b rotate at a relatively high speed. Further, the rotational force transmitted from the gear 15 to the gear 16 is transmitted to the paper feed roller shaft 9b by the electromagnetic clutch 12, and the paper feed roller 1 rotates at a relatively slow speed. In this case, although the peripheral speed of the horizontal conveyance rollers 3a, 3b and the peripheral speed of the paper feed roller 1 are different, since the one-way clutch 13 is interposed between the gear 17 and the shaft 9b, the horizontal conveyance rollers 3a, 3b and the paper feed roller 1 can rotate at individual circumferential speeds. Thereafter, when the paper feed roller 1 starts to rotate, the electromagnetic clutch 12 is disconnected.

Next, when the conveyance of the sheet 5 by the horizontal conveyance rollers 3a and 3b is completed, the electromagnetic clutch 11 is also disconnected. These series of operations are controlled by a timetable set in the control device.

Next, the control device starts feeding the next sheet according to the timetable.

FIG. 2 is a schematic diagram showing a collator composed of a plurality of sets (12 to 20 sets) of paper feeding devices 20, 21a, 21b, . The paper feed devices 21a, 21b,... all have the above-mentioned structure, and each paper feed device 21a
, 21b, . . . are conveyed downward by the vertical conveyance rollers 24.

A sheet folding section is provided below these vertical conveyance rollers 24. That is, the leading edge of the folding sheet 23 fed from the sheet feeding device 20 for folding in half collides with the stopper of the folding plate 22, so that the central portion thereof is bent downward. At the same time, the paper feeders 21a and 2
Sheets 5 fed from 1b, . It is designed to be ejected.

[0041] In the paper feeding devices 21a, 21b,...
As mentioned above, the sheet 5 is separated between the paper feed roller 1 and the separating plate 2.
The sheet is separated into one sheet, and the sheet is temporarily stopped at a position slightly downstream in the sheet flow direction from the mutual contact position of the horizontal transport rolls 3a and 3b. Conveyance of these sheets 5 is restarted in order from the upper sheet 5 at a predetermined timing, and the leading ends of each sheet 5 are brought into contact with the center of the bending part of the sheet 23 for folding in half with the leading ends aligned. Then, the folding sheet 23 is sandwiched between the pair of folding rollers 25 from the bending portion. This folding roller 25
By sandwiching and conveying the sheet 23 for folding into two
fold. At this time, the paper feed devices 21a, 21b,...
Each sheet 5 fed from is sandwiched between two folding sheets 23 to form a leaflet bundle 29. This leaflet bundle 29 is conveyed by conveyance rollers 26 and 27 and discharged onto a paper discharge tray 28.

In this embodiment, as described above, each sheet feeding device temporarily stops the sheets 5 at a predetermined position, and starts feeding these sheets 5 at a predetermined timing to collect the sheets 5 from each sheet feeding device. to gather. Therefore, even if the feeding timing of the sheet 5 deviates when the sheet 5 is sorted between the paper feeding roller 1 and the sorting plate 2 in each paper feeding device, the timing at which the sheet 5 is conveyed by the vertical conveyance roller 24 can be adjusted. can be maintained constant. As a result, the leading edges of the plurality of sheets sandwiched between the two folding sheets are always aligned, and there is no need to manually align the leading edges of the sheet bundle as in the past. Further, there is no need to adjust the sheet feeding timing for each sheet feeding device depending on the type of sheet, and the handling of the collator becomes easier. Furthermore, even when processing at high speed,
It is possible to avoid misalignment of the leading edge of the sheet.

[0043]

Effects of the Invention As explained above, according to the method of the present invention, sheets are separated from a sheet bundle one by one and conveyed, and after the sheets are temporarily stopped at a predetermined position, conveyance is resumed at a predetermined timing. Therefore, the leading edges of sheets fed from a plurality of paper feeding devices can be reliably aligned. In this case, there is no need to adjust the sheet feeding timing for each sheet feeding device depending on the sheet type (thickness, paper quality, shape, etc.), and the collator operation becomes extremely easy.

Furthermore, the apparatus of the present invention includes a sheet stopping means for temporarily stopping the sheet at a predetermined position and a conveying speed switching means for changing the circumferential speed of the conveying roller.
Sheet feeding using the above-described paper feeding method can be easily realized.

[Brief explanation of the drawing]

FIG. 1(a) is a schematic front view showing a paper feeding device according to an embodiment of the present invention, and FIG. 1(b) is a schematic top view thereof.

FIG. 2 is a schematic diagram showing a collator composed of multiple sets of paper feeding devices.

FIG. 3 is a schematic plan view showing a conventional paper feeding device used in a newspaper advertisement collating machine.

[Explanation of symbols]

1, 37; Paper feed rollers 2, 24; Separating plates 3a, 3b, 41a, 41b; Conveyance roller 4; Paper detection sensor 5; Sheets 8a, 8b; Horizontal conveyance roller axes 9a, 9b; Paper feed roller axes 11, 12 ; Electromagnetic clutch 14; Electromagnetic brakes 20, 21a, 21b,...; Paper feeding device 24; Vertical conveyance roller 28; Paper ejection tray 31; Paper feeding tray

Claims (2)

[Claims] [Claim 1] In a paper feeding device in a collator that feeds sheets one by one from a plurality of sheet bundles and bundles these sheets, a separating member and a separated sheet are fed between the separating member. A paper feed roller, a conveyance roller that conveys the sheet fed from the paper feed roller,
It has a sheet stopping means for temporarily stopping the sheet at a predetermined position, and a conveying speed switching means for switching the circumferential speed of the conveying roller, and the conveying speed switching means is configured to stop the sheet until it reaches the predetermined position. The peripheral speed of the transport roller is set to a first speed, and when restarting transport of the sheet from the predetermined position, the peripheral speed of the transport roller is set to a second speed higher than the first speed. A paper feeding device in a collector, characterized in that: 2. In a paper feeding method in a collator in which sheets are fed out one by one from a plurality of sheet bundles and these sheets are bundled, one sheet is separated from the sheet bundle by a separating means and this sheet is moved at a first speed. a step of conveying the sheet, a step of stopping the sheet at a predetermined position, and restarting conveyance of the sheet at a timing determined by a distance between the sheet stop position and a gathering position of the sheets from the plurality of sheet bundles. A method of feeding paper in a collator, comprising the step of conveying the sheet at a second speed higher than the first speed.