JPH01299138A - Sheet feeding device - Google Patents

Abstract

PURPOSE:To reliably separate a sheet, by a method wherein the tip of a sheet is regulated by means of a stopper located in the vicinity of a roller for feeding a sheet from a feed part at the same speed as the drive speed of a subsequent process, and a press roller is separated away from and brought into contact with a feed roller. CONSTITUTION:Sheets 1 from a feed part A are fed one by one to a feed sheet table 17. The sheets 1 are conveyed by means of a feed roller 18 at the same speed as the conveyance speed of a conveyance roller 39 at a subsequent process C. Through protrusion and retraction of a stopper 19 situated in the vicinity of the feed roller 18 to and from a conveyance passage by means of a stopper cam 29, the tip of the sheet 1 is regulated. In linkage with protrusion and retraction of the stopper 19, a press roller 20 is separated from and brought into contact with the feed roller 18 through an arm, not shown, by means of a gear 25. A series of the drives is effected in a way that the rotation output of a motor 40 is transmitted to conveyance rollers 16, 18, and 39 and gears 25 and 29 through a belt, a pulley, and reduction gear 11. This constitution causes reliable separation of the sheet 1 and the feed of it to the next process C.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sheet feeding device that can continuously feed sheets cut into predetermined dimensions to the next process at a predetermined timing.

<Prior Art> In recent years, multicolor picture printing has been increasingly used in printed publications, product package packages, and the like.

For these printed materials, there is a strong demand from the user side for luxury products, and a strong demand from the manufacturer side for increasing added value.

One method for meeting the above-mentioned requirements is gloss processing that imparts a metallic luster to the surface of printed matter. Nowadays, it has become mainstream to apply gloss processing to the surface of printed matter.

There are two methods for performing the gloss treatment: one is to laminate an extremely thin plastic film to the printed surface, and the other is to uniformly apply varnish to the printed surface.

The laminating method includes supplying a sheet cut to a predetermined size and having a print on the surface to a laminating device,
A plastic film is attached to the printed surface of the sheet, and the varnishing method involves feeding the sheet to a varnishing device and uniformly applying varnish to the printed surface of the sheet using a varnishing roll. It also dries the space between the nuclei.

No matter which method is used to perform the gloss treatment, a predetermined overlapping margin is provided between the sheets in order to smoothly perform the treatment before supplying the sheets to a laminating device or a varnishing device.

That is, in the case of the laminating method, as shown in FIG. 5(A), the press roll of the laminating apparatus is moved with an overlap margin between the front end 1a and the rear end 1b of the continuously supplied sheets 1. 'la, 2b, it is possible to continuously laminate the plastic film 3 on the surface of these sheets 1, but as shown in the same figure (B), it is possible to separate the sheets 1 from each other. If the plastic film 3 is supplied with the plastic film 3 attached to the lower pressing roll 2b, it may become impossible to carry out a smooth laminating operation.

In addition, when using the varnishing method, as shown in FIG. 6(A), the front end la and the rear end 1 of the continuously supplied sheet
If the varnishing treatment is performed with an overlap margin between the front end 1a of the sheath 1 and the overlap margin, the front end 1a of the sheet) 1 will not be varnished in the overlap portion, so the conveyor The sheet 1 can be easily removed from the conveyor 4 by supplying the sheet 1 to the conveyor 4, drying the sheet 1, and blowing air onto the front end 1a of the sheet 1 from the air nozzle 5 after drying. However, when the sheets 1 are separated from each other and subjected to varnishing treatment and then supplied to the conveyor 4 to dry the sheets 1, as shown in FIG.
Since varnish is applied to the front end 1a of the sheet 1,
The entire surface of the sheet l adheres to the conveyor 4, and it is difficult to remove the sheet even if air is blown from the air nozzle 5.

The size of the overlapping allowance is determined depending on the form of the final product. That is, the value varies depending on the package such as a box of 9 bags or the publication, and is usually set between 5 and 100 cranes as shown in FIG.

<Problems to be Solved by the Invention> When performing the gloss treatment as described above, it is necessary to feed the sheets continuously to the processing device with a predetermined overlap margin between the sheets. . That is, it is necessary to supply the preceding sheet and the sheet following the preceding sheet to the processing device at a constant timing with a predetermined overlap margin.

Furthermore, when feeding the sheet, it is necessary to ensure that the sheet does not bend.

For this reason, currently, skilled workers manually feed the sheets one by one, which results in low productivity in gloss processing.
There is a problem of high cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet feeding device that increases stacking accuracy and productivity without requiring a skilled person.

<Means for Solving the Problems> In order to solve the above problems, the sheet feeding device of the present invention has the following features:
A sheet feeding device for continuously feeding sheets cut into predetermined dimensions to the next process, comprising a feeding section for feeding the stacked sheets at a predetermined speed, and a drive speed for the next process. a feed roller rotating at the same speed as the feed roller; a stopper provided near the feed roller and driven at the same speed as the sheet feeding speed in the feed section to regulate the leading edge of the sheet; and a stopper opposing the feed roller. a registering device configured by a pressing roller that is provided at the stopper and is driven at the same speed as the stopper to move toward and away from the feed roller; and a changing means for changing the sheet feeding speed in the feeding section. It is composed of

According to the above means, the sheet feeding device has a feeding section capable of stacking sheets cut to a predetermined size and feeding the sheets at a predetermined speed, and a feeding section that is driven at the same speed as the driving speed in the next process. a feed roller provided near the feed roller and driven at the same speed as the sheet feeding speed to regulate the leading edge of the sheet; and a stopper provided opposite the feed roller and driven at the same speed as the stopper. The registration device includes a pressing roller that approaches and separates from the feed roller, and a changing means for changing the sheet feeding speed in the feeding section. The sheet can be supplied to the next process by controlling the pressure roller and moving the pressure roller toward and away from the feed roller. In addition, by operating the changing means to change the sheet feeding speed of the feeding section, it is possible to create a speed difference between the driving speed of the next process and the stopper and the pressure roller at the same speed as the sheet feeding speed. By driving at a predetermined value and setting the sheet feeding speed by the feeding section to a predetermined speed, it is possible to set the overlap margin between the sheets to be fed to a predetermined value.

<Example> An example of a sheet feeding apparatus to which the above means is applied will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram when applied to a varnishing device, FIG. 2 is a side explanatory diagram of the registration device, and FIG. 3 is a perspective view thereof.

In the figure, supply section A separates and supplies stacked sheets 1, which have been cut into a predetermined size and printed with multicolor patterns such as offset printing on the surface, one by one from the top. It is.

This supply section A is driven together with the varnishing device C by a drive motor 40, which will be described later. By interposing a transmission device 11 serving as a changing means between the drive motor 40 and the supply section A, the drive speed of the varnishing device C and the drive speed of the supply section A, that is, the supply speed of the sheet 1 are relatively adjusted. It is configured so that it can be changed to Further, the output of the transmission 11 is transmitted by a transmission means 12 such as a chain or a timing held,
is configured to be input.

In addition, this supply section A places the stacked sheets 1 on a stacking platform 14, and uses a suction cup 15 provided at the top to remove the topmost sheet 1.
The paper is adsorbed and fed to the conveyance roller 16 to be supplied to the next process.

The suction cup 15 is connected to a vacuum pump (not shown) via a mechanical valve, and is configured to be movable in the directions of arrows a and b in the figure by a moving mechanism (not shown). Then, by moving in the direction of arrow a, the uppermost sheet 1 of the stacked sheets 1 is attracted and separated, and in this state, the sheet 1 is moved in the direction of arrow A and transferred onto the paper feed table 17 via the conveying roller 16. supply.

In the supply section A, the top position of the stacked sheets 1 is controlled so that it is always within a certain range.

That is, the top of the stacked sheets 1 is detected by a microsinch or the like (not shown), and if the top position falls below a certain range, the stacking platform 14 is driven by a drive motor (not shown). It is configured to raise the stacking platform 14.

As the supply section A, a conventionally known automatic paper feeder can be used.

The paper feed table 17 is provided with a conveyor, and a registration device B is provided at the front end thereof. As shown in FIGS. 2 and 3, this registration device B includes a feed roller 18 that rotates at the same speed as the driving speed of the varnishing device C that will perform the next process, and a stopper provided near the feed roller 18. 19, and a pressure roller 20 provided opposite to the feed roller 18.

The rotation of the pressure roller 39 of the varnishing device C is transmitted to the feed roller 18 via a transmission means 21 such as a chain or a timing belt, and the varnishing device C It rotates at the same speed as the driving speed.

Further, the stopper 19 and the pressing roller 20 are driven at the same speed as the supply speed in the supply section A by transmitting the rotation of the input boolean 3 of the supply section A through a transmission means 22 such as a chain or a timing belt. has been done.

That is, the drive system of the stopper 19 and the pressing roller 20 is connected to a shaft 23 and a pulley 24. A gear 25 and a pressing cam 26 are fixed, a chino as a transmission means 22 is meshed with the pulley 24, and a gear 28 and a stopper cam 29 are fixed to the shaft 27, which mesh with the gear 25 at a gear ratio of 1:1. With this configuration, these stoppers 19 and pressing rollers 20 are driven at the same speed as the feeding speed of the feeding section A.

The stopper 19 is connected to the feed roller 18 as shown in the figure.
is provided near the sheet feed table 17, and temporarily stops the sheet 1 by contacting the leading edge of the sheet 1 conveyed on the paper feed table 17, corrects the bending that occurs in the sheet 1 during this stop, and also By being driven at the same speed as the supply speed of part A and rotating in the direction of arrow C, the varnish coating 2
This is to regulate the feeding timing of sheet 1 with respect to c.

For this reason, a plurality of stoppers 19 are fixed to a camshaft 31 rotatably attached to the frame 30 at predetermined intervals. Further, a lever 32 is fixed to the camshaft 31 and has a cam follower 32a fixed thereto that comes into contact with the cam surface of the stopper cam 29. The lever 32 is always urged toward the stopper cam 29 by a tension spring 33 provided between the lever 32 and the frame 30.

Therefore, when the stopper cam 29 rotates, the lever 32 swings around the camshaft 31 as the stopper cam 29 rotates, thereby swinging the S7 par 19 in the direction of arrow C.

By swinging the stone bar 19, the seat 1 can be stopped or stopped.

Further, the pressure roller 20 is provided facing the feed roller 18, moves toward and away from the feed roller 18 in conjunction with the operation of the stopper 19, and when it comes into contact with the feed roller 18, the sheet l is transferred to the varnishing device 2c. It is used for transporting objects in the following directions.

For this reason, the pressing roller 20 is rotatably attached to a plurality of pressing levers 35 fixed at predetermined intervals to a camshaft 34 rotatably attached to the frame 30. Further, a lever 36 is fixed to the cam shaft 34 and has a cam follower 36a fixed thereto that contacts the cam surface of the pressing cam 25. The lever 36 is always urged toward the pressing cam 26 by a tension spring 37 provided between the lever 36 and the frame 30.

Therefore, when the pressing cam 26 rotates, the lever 36 swings around the camshaft 34 in conjunction with this rotation, and this swinging causes the pressing roller 20 to swing in the direction of arrow d, causing the feed roller 1
Dissociate to 8. Then, the pressure roller 20 is moved to the feed roller 18.
When the rollers 20.1B come into contact with the rollers 20.1B, the sheet 1 is held between the rollers 20.1B, and the sheet 1 is conveyed in the direction of the varnishing apparatus C by the rotation of the feed roller 18.

Next, the varnishing device C includes a varnishing roll 38 provided on the upper surface side of the sheet 1 to be supplied, and a varnishing roll 38 provided on the upper surface side of the sheet 1 to be supplied.
and a pressure roll 39 provided on the lower surface side of the sheet 1 opposite to the pressure roll 39. Then, the sheet 1 is supplied between the varnishing roll 3 and the pressure roll 39, and the sheet 1 is
A varnishing process, which is a gloss treatment, is applied to the printed surface of the paper.

This varnishing device C is driven by a drive motor 40 via a speed change mechanism and a speed reduction mechanism (not shown). As described above, this drive motor 40 drives the varnishing device c and the supply section A at the same time.

Next, a case will be described in which the sheet 1 is supplied to the varnishing device C by the sheet supply device configured as described above.

First, sheets 1 that have been cut to a predetermined size and have been printed with offset printing or the like are stacked on a stacking table 14 with the printed side facing up. When the entire apparatus starts operating, the drive motor 40 starts rotating, the vacuum pump starts rotating, and the uppermost sheet 1 of the stacked sheets 1 is sucked by the suction cup 15 and placed on the paper feeding table 17. supplied to Continuously fed sheet 1
are each supplied in a state submerged below the preceding sheet 1. The overlap margin at this time has a size of about 250n. The sheet 1 supplied onto the paper feed table 17 is conveyed toward the registration device B by a conveyor while maintaining the overlapping margin.

When the leading edge 1a of the sheet 1 comes into contact with the stopper 19, the sheet 1 stops on the spot, and if the sheet 1 is bent, the leading edge 1a of the sheet 1 is biased by the conveyor 17a. By contacting all the stoppers 19, the bending can be corrected.

The rotation of the stopper cam 29 and the pressing cam 26 progresses,
The cam follower 32a comes into contact with a protrusion formed on the cam surface of the stopper cam 29, and the stopper 19 swings in the direction of arrow C to release the stoppage of the sheet 1. At the same time, the protrusion formed on the cam surface of the pressing cam 26 The cam follower 36a comes into contact with the projection, and the pressure roller 20 swings in the direction of arrow d and contacts the feed roller 18, thereby conveying the sheet 1 to the varnishing device C side.

Subsequently, as the rotation of the cams 29 and 26 further progresses, the pressure roller 20 is separated from the feed roller 18, and the sheet 1 is conveyed while being held between the varnishing roll 38 and the pressure roll 39 of the varnishing device C. Ru. Then stopper 1
9 stands up and comes into contact with the leading edge of the sheet 1 following the preceding sheet 1 being conveyed on the paper feed table 17, thereby stopping the sheet 1. At this time, the preceding sheet 1 is being conveyed at the driving speed of the varnishing device C, but a part of this sheet 1 is still on the feed roller 18, and by stopping the continuing sheet 1 by the stopper 19, The overlap between sheets 1 is reduced. Then, when the overlapping margin reaches a predetermined dimension, the stopper 19 and the pressing roller 20 swing again, and the overlapping margin between the rear end lb of the preceding sheet 1 and the leading edge 1a of the succeeding sheet 1 is adjusted to a predetermined value. It is transported to the varnishing device C while maintaining the same dimensions.

As shown in FIG. 4, by stopping the sheet 1 and adjusting the timing to start conveying the preceding sheet 1 and the sheet 1 following the sheet 1, the sheet can be stacked at a timing with a predetermined overlap margin, as shown in FIG. Then, it can be supplied to the varnishing device C, which is the next step.

The size of the overlapping margin can be adjusted by operating the transmission 11 to change the drive speed to the supply section, that is, the supply speed, relative to the drive speed of the varnishing device c.

That is, when a sheet of length l is adjusted to overlap 5 times and then varnished, and then the overlap is adjusted to 20 times, the variable speed bag 211 is operated to change the feeding speed to the supply section. This can be done by increasing the timing of the operation of the stopper 19 and the pressing roller 20.

Also, the length of the sheet is l'! When performing varnishing processing with an overlap margin of 5fl using a sheet longer than
The time it takes for the sheet ' to pass the feed roller 18 of the registration device B is longer by 1'-1 compared to the time it takes for the sheet of length l to pass the feed roller 18.

Therefore, by operating the transmission 11 to reduce the supply speed of the supply section A and delaying the operation timing of the stopper 19 and the pressing roller 20, the overlapping margin between the preceding sheet and the sheet following this sheet can be reduced by 5. It can be adjusted to

In the embodiments described above, the supply section A was driven by the drive motor 40 that drives the varnishing device C, but separate drive motors may be provided for driving the supply section A and the registration device B. . In this case, it is possible to change the speed of the rotation of the drive motor using a mechanical transmission or an electric transmission such as an inverter.

In the above-mentioned embodiment, the case where the varnishing device C was used as the next step was explained, but it is also possible to apply a film laminating device or other similar device as the next step.

<Effects of the Invention> As explained in detail above, the sheet feeding device of the present invention has the following effects:
A supply unit that stacks sheets cut to predetermined dimensions and supplies the sheets at a predetermined speed, a feed roller that is driven at the same speed as the drive speed in the next process, and a feed roller provided near the feed roller. A stopper is driven at the same speed as the feeding speed of the sheet to regulate the leading edge of the sheet, and a pressure roller is provided opposite to the feed roller and driven at the same speed as the stopper to move toward and away from the feed roller. Since the register device is configured by the above-mentioned registration device and the changing means for changing the sheet feeding speed in the feeding section, the leading edge of the sheet fed from the feeding section is regulated by the stopper, and the pressing roller is changed to the feeding roller. By moving the sheets toward and away from each other, the sheet can be fed to the next process, and by operating the changing means, the sheet feeding speed of the feeding section can be changed, thereby adjusting the operation timing of the stopper and the pressing roller. The overlap margin between the supplied sheets can be set to a predetermined value.

Furthermore, by using the sheet feeding device of the present invention, as mentioned above, sheets can be automatically fed to the next process, so there is no need for skilled workers, and productivity is increased and costs are reduced. It has characteristics such as being able to

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram when the supply device is applied to a varnishing device, Fig. 2 is a side explanatory diagram of the registration device, Fig. 3 is a perspective view thereof, and Fig. 4 is an explanatory diagram of the overlapping margin of sheets. Figures 5 and 6
The figure is an explanatory diagram of a conventional example. A is the supply section, B is the registration device, C is the varnishing device, l is the sheet, 1a is the leading edge of the sheet, lb is the trailing edge of the sheet, 11
is a transmission, 14 is a stacking platform, 15 is a suction cup, 16 is a conveyance roller, 17 is a paper feed table, 18 is a feed roller, 19 is a stopper, 20 is a pressure roller, 25.28 is a gear, 26
29 is a pressing cam, 29 is a stopper cam, 32.36 is a lever, 35 is a pressing lever, and 40 is a drive motor. Patent applicant: Tokyo Paper Feeder Co., Ltd.

Claims (1)

[Claims] A sheet feeding device for continuously feeding sheets cut into predetermined dimensions to the next process, comprising a feeding section for separating and feeding the stacked sheets, and a drive speed for the next process. A feed roller rotating at the same speed; a stopper provided near the feed roller and driven at the same speed as the sheet feeding speed in the feeding section to regulate the leading edge of the sheet; and a stopper facing the feed roller. A registration device configured by a pressing roller that is provided and driven at the same speed as the stopper to move toward and away from the feed roller, and a changing means for changing the sheet feeding speed in the feeding section. sheet feeding device.