JPH05270731A - Control device for folding brush of folding machine - Google Patents

Abstract

(57) [Summary] [Purpose] The height of the signature holding brush used for the chopper folding device of the folding machine is automatically adjusted according to the conditions of the signature and the speed of the folding machine to increase the folding accuracy and A signature pressing brush control device that can increase productivity. A drive means for adjusting the brush height according to the output from the means for detecting the speed of the folding machine is provided with means for detecting the speed of the folding machine and brush height adjusting means. Have

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chopper folding device for folding a signature folded by a folding unit connected to a web-fed rotary printing press or a folding unit of a single folding machine in a direction perpendicular to the folding direction. The present invention relates to a controller for a signature pressing brush.

[0002]

2. Description of the Related Art Generally, a web-fed rotary printing press has a folding machine connected to the rear portion thereof, and in the folding machine (FIG. 1), a paper web (web) is used.
There are a former (2) for half-folding (1) in the width direction, a cutting cylinder (3) for cutting it into specified dimensions, and a folding cylinder (4) for half-folding in the running direction.
The page folding is a chopper folding in which a signature folded by a folding cylinder through another transport path is further folded in half, and the finished signature of this step is 16 pages.

The chopper folding device (10) comprises a signature conveyor belt (11), a chopper blade (12), a nip roller (13), an impeller part (15) and the like. In FIG. 2, there is a plurality of signature conveyor belts (11) that continuously run from left to right in the figure with the signatures sandwiched vertically on a plate (16), and near the signature running end of the plate, There is a paper pad (17) to stop the signature.

A chopper arm (19) is attached to a chopper swing shaft (18) pivotally supported by the frame of the folding machine, and a thin chopper blade (12) is attached to an end of the chopper arm (19) although it depends on the swing method. Has been. The blade is lowered at the timing when the signature reaches the paper pad, the signature is tapped and folded at a right angle to the paper pad (17), and the opening (20) is provided near the blade drop of the plate.
(FIG. 3), it is pushed downward by an upper nip roller (21) (FIG. 3) provided below it, and is clamped by a lower nip roller (22) provided below it so as to make a crease. And then pushed down. The signatures that have passed through the upper and lower nip rollers are guided by a guide belt and a guide (not shown), and the impeller (1
5) (Fig. 1) are put in one by one, transported by the rotation of the impeller, and then delivered to the discharge conveyor. Note that FIGS. 1, 2 and 3 used for the description of the above-mentioned prior art are the same except for the device part of the present invention, and therefore, they are also used in the section of the description of the embodiments of the present invention which will be described later, and are common. Mechanisms and parts are indicated by the same numbers.

However, in such a conventional chopper folding device, it becomes difficult to perform accurate right-angle folding as the machine speed increases. In other words, it is difficult to accurately convey the signature from the folding cylinder in the previous process to the paper contact part of the signature without twisting or delay, and to apply the signature correctly to the paper contact. If it hits too much, it may break or bounce, increasing the number of defective products,
There is a drawback that causes a decrease in productivity. Further, there is a drawback that the accuracy of chopper folding decreases as the speed becomes higher than that of cylinder folding by a folding cylinder.

In order to make up for these drawbacks, there are some machines in which the timing of the chopper with respect to the signature is adjusted, but in this case, the structure of the machine becomes complicated, and depending on the speed during operation of the machine. Adjusting the timing was extremely difficult.

As another method of compensating for this drawback, a brush device for restricting the travel of a signature near the chopper blade to decelerate the signature is known from Japanese Utility Model Laid-Open No. 3-111663, and this device is designed to reduce the height of the brush. By adjusting it, the deceleration strength is adjusted.

However, in this known device, the friction coefficient changes due to the worn state of the belt surface, the number of pages in the signature, the difference in the running state due to the difference in the paper quality, the degree of contact with the paper, and the change in the folding speed. It is necessary to manually adjust the height of the brush each time, which makes the adjustment complicated and reduces productivity.

[0009]

The present invention has been made in view of the above problems, and an apparatus according to the present invention is a signature deceleration brush provided on both sides of a chopper blade in front of a paper pad. This is a control device that automatically sets the brush height to the optimum position according to the setting of the initial height of the brush that matches the signature conditions and the change in the speed of the folding machine or the rotary web press, that is, the traveling speed of the signature. It is intended to do so and has the following configuration.

That is, the device of the present invention according to claim 1 is
Of a folding machine connected to a web-fed rotary printing machine or a single folding machine equipped with a chopper blade and a paper pad that regulates the position of the signature, and a signature holding brush provided on both sides of the chopper blade whose height can be adjusted. In the chopper folding device, means for detecting the speed of the folding machine or the speed of the rotary web printing press, and brush height adjusting means are provided, and the brush height adjusting means detects the speed of the folding machine or the speed of the rotary press. It is a signature pressing brush control device for a folding machine, which has a control means for adjusting the brush height according to the output from the.

Further, the apparatus of the present invention according to claim 2 is provided with a chopper blade, a paper pad for controlling the position of the signature, and a folding webbing provided on both sides of the chopper blade whose height can be adjusted. In a chopper folding device of a folding machine or a single folding machine connected to the printing machine, a means for detecting the speed of the folding machine or the speed of the rotary web printing press, and a brush height detecting means and a brush height adjusting means, The brush height adjusting means has an initial setting means capable of initializing the brush height according to the type of signature,
A signature holding brush control device for a folding machine, comprising a control means for automatically adjusting a brush height according to an output from a means for detecting the speed of the folding machine.

Further, the apparatus of the present invention according to claim 3 is provided with a chopper blade, a paper pad for restricting the position of the signature, and a folding webbing provided on both sides of the chopper blade whose height can be adjusted. In a chopper folding device of a folding machine or a single folding machine connected to the printing machine, a means for detecting the speed of the folding machine or the speed of the rotary web printing press, and a brush height detecting means and a brush height adjusting means, The brush height adjusting means is an input means for inputting signature data such as paper width, paper thickness, paper type, number of pages, amount of ink, paper width, paper thickness, paper type, number of pages,
Data holding means for holding brush height data corresponding to the amount of ink, selection means for selecting the brush height data corresponding to this when signature data is input at the start of work, and selected. Signature holder of a folding machine having display means for displaying the brush height data and drive means for adjusting the brush height based on the selected and displayed brush height data. It is a brush control device.

Further, the apparatus of the present invention according to claim 5 is connected to a web-fed rotary printing press equipped with a chopper blade, a paper pad for regulating the position of a signature, and signature pressing brushes provided on both sides of the chopper blade. A signature pressing brush control device for a chopper folding device of a folding machine or a single folding machine, comprising a motor for moving the signature pressing brush up and down, and a brush height for detecting the amount of rotation of the motor as a brush height. Detecting means, speed detecting means for detecting the speed of the web rotary press or folding machine, brush height initial value input means, and a target which is the sum of the brush height initial value input means and the output from the speed detecting means. From the comparison means for comparing the value and the actual value which is the output from the brush height detection means, and the motor driver for driving the motor that moves the brush up and down until the output of this comparison means becomes zero. A signature pressing brush control device of a folding machine according to claim Rukoto.

In each of the above inventions, the signature pressing brushes provided on both sides of the chopper blade can be independently adjusted in height, and at the same time, both brush heights can be adjusted by the same height at the same time. .

[0015]

In the signature pressing brush controller of the present invention, the degree of contact of the signature with the paper stopper at low speed,
By adjusting the accuracy of right-angled folding and setting the brush descent amount according to the speed, the signature is always brought into contact with the paper rest at a constant strength without being affected by the speed. Also, readjustment during folding work is easy.

[0016]

The present invention will be described in detail below with reference to the drawings showing the embodiments. FIG. 1 is a schematic side view showing the entire folding device to which the device of the present invention is attached. However, the control device portion is not shown.

Usually, the wrapping paper (1) is folded in the middle by the former (2), and the signature cut by the cutting cylinder (3) to a predetermined size is folded between the folding cylinder (4) and the jaw cylinder (5). To be
At this time, it is folded into four pages, and there are eight pages on the front and back. The signature held by the gripper (5) is separated from the gripper before it makes one rotation, and is vertically sandwiched by the signature transfer belt (11) to proceed horizontally to the chopper folding device (10). .

Next, regarding the chopper folding device (10),
It will be described with reference to FIG. 2, which is a schematic perspective view of the apparatus. The chopper arm (19) is fixed to the swing shaft (18), and the lever (23) attached to the shaft end swings at a required angle by a cam mechanism (not shown) or the like, and the chopper blade (12) attached to the chopper arm end. , Plate (1
The vertical movement is repeated for the opening (20) of 6). Place a paper pad (1
7), but a signature pressing brush (24) is provided in front of it. Although the signature pressing brush (24) is shown only on the front side of the chopper blade (12) in FIG. 2, it is actually arranged on both sides of the chopper blade.

FIG. 4 is a front view of the signature pressing brush (24) and a vertical movement driving device for the brush. In the figure, a brush mount (25) is provided on the plate (16) behind the signature (6) running end, and horizontal support plates (26) and (27) are mounted above and below this mount. There is. The screw shaft (28) is rotatably supported at its lower end between the support plates by a thrust bearing (29) embedded in the support plate (27),
Its upper end is connected to the DC motor (31) installed on the support plate (26) via the coupling (30). A potentiometer (32) is attached to the DC motor (31). A moving nut (33) is screwed onto the screw shaft (28), and the moving nut is restricted in rotation by a guide shaft (34) provided between the support plates and is movable only in the vertical direction. On the side surface of the moving nut (33), there is a brush holder (35) for attaching a brush having an L-shaped cross section, and a signature pressing brush (24) (hereinafter simply referred to as a brush) is attached to the lower end of the brush holder. There is. When the motor (31) rotates, the screw shaft (28) rotates, and the moving nut (33) moves upward or downward according to the rotation, and the height of the brush (24) moves upward or downward accordingly. Adjusted.

Next, a control device for controlling the height of the brush (24) will be described with reference to FIG. 5, which is a block diagram of a control system. The control system includes a motor (31) for rotating the screw shaft (28), a potentiometer (32) for detecting the height of a brush attached to the motor reducer shaft as a rotation amount, a motor drive driver (40), and a rotation amount of a multi-rotation potentiometer. Limit comparator (4
1), a comparator (42) for detecting the upper and lower limits of the moving nut (33), a rotary printing machine (hereinafter simply referred to as a printing machine) or a tacho generator (43) for detecting the operating speed of a folding machine, and an initial stage of a brush. Bias volume (44) that sets the height, gain volume (45) that sets the descending amount of the brush (24) in proportion to the increase in the operating speed of the machine, and the set bias and gain A differential amplifier (46) that calculates a target value at a certain speed of the machine from the value, compares the target value with the actual height position, and forwards (down), reverses (up), or stops the motor (31) command. Is provided by a comparator (47) or the like.
Except for the internal tacho generator of the above elements, a pair is provided corresponding to a pair of brushes provided with a chopper blade sandwiched therebetween.

Next, the function of each part of the control system will be described. Potentiometer for detecting brush height position (3
Since 2) has a limit in the amount of rotation, the value corresponding to this absolute rotation angle is set in the comparator (41), and the values on both outsides of this value cause the motor (31) to move further in this direction. A command to prohibit rotation is issued to the comparator (47). In the embodiment, the absolute rotation angle of the potentiometer is 10 rotations 3600 degrees. This potentiometer (3
Instead of 2), a linear gauge sensor (linear gauge), a differential transformer may be used, or pulse counting by an encoder may be performed.

The comparator (42) limits the physical upper and lower limit positions of the moving amount of the brush elevating part. In the examples, the value of the potentiometer (32) is shown as the amount of height. In this case as well, rotation to both outsides of the limited height is prohibited as in the above case. Further, a limit switch may be attached to the moving body instead of the comparator (42), the upper and lower limit positions may be detected, and this signal may be given to the comparator (47).

The tacho generator (43) detects the rotational speed of the printing machine or the folding machine, and is converted into an electric quantity and given as one of input signals for control. Gain adjustment volume (4) that increases / decreases (gain) this input
5), Bias adjustment volume (4
4), the output of the tacho generator (43) whose gain is adjusted by this volume (45) and the volume (4
The target height value (target value) of the brush is electrically set by the differential amplifier (46) which inputs and calculates the bias value adjusted by 4). The bias adjustment in this embodiment means adjusting the initial height of the brush. This target value is given to the comparator (47), while the output (actual value) of the potentiometer (32) that outputs the brush height position as an electric quantity is also given to the comparator (47). The values are compared, and the brush height adjusting motor (31) is supplied with a normal rotation or reverse rotation signal to the motor driver (40) to rotate the motor (31) depending on whether the compared value is positive or negative, and the output of the comparator (47) is output. Adjustment is made until it becomes zero, in other words, until the target value and the actual value become equal. Of course, at this time, the movement amount of the brush is limited by the comparators (41) and (42) as described above.

Next, a method of adjusting the height of the brush of the present invention will be described based on examples. (A) Run the printing machine and folding machine at a slow or low speed to let the signatures flow into the chopper folding device. (B) Assuming that the paper chopper of the chopper folding device is adjusted at right angles to the flow direction of the signatures, the right and left sides of the signatures are not in contact with the paper crate evenly and the brush slightly touches the signatures. Turn the initial height height of the operation panel [corresponding to the volume (44) in the block diagram of FIG. 5]. In this low speed operation, since the output of the tacho generator (43), which is the other input to the differential amplifier (46) and which indicates the mechanical speed, is extremely small, the output of the differential amplifier (46) is targeted only at the initial height value. The value becomes a value, and the difference between the target value and the actual value of the potentiometer (32) at rest (zero in this case) and a positive signal are output to the motor driver (40) to the motor (40). 31) Rotate forward. With the rotation of the motor (31), the output value of the potentiometer (32) increases and is given to the successive comparator (47) as an actual value. When the value becomes equal to the target value, the output of the comparator becomes zero,
The motor driver (40) outputs a stop signal for the motor (31).

(C) When the printing machine and the folding machine are operated at the production speed, the setting of the initial height of the brush is basically the same. That is, the machine speed is increased after the initial value is set. Tacho generator (4
The output from 3) increases, and the motor (31) rotates forward until the target value, which is the sum of the gain adjustment value and the initial height value, is equal to the actual value, which is the potentiometer output value. And stop when they are equal.

(D) When the value of the gain by the gain adjustment volume (45) set empirically in advance is not appropriate for the production operation speed, for example, the brush height is too high and it is sufficient for the signature. If the brake is not applied and it hits the paper holder strongly, and the tip of the signature is scratched or torn, or conversely, the brush height is too low for the signature to reach the paper holder.
If the chopper folding is inaccurate and the accuracy is not good, readjust the gain adjustment volume (45) to enable accurate chopper folding (Fig. 6). At this time, the brushes on both sides of the chopper blade move up and down by the same height. Also for this adjustment, as described above, the rotation use range of the potentiometer (32) and the upper and lower operating range of the brush are regulated by the comparators (41) and (42), and the brush support, the drive section, and the electric system are controlled. Is also protected.

In the above embodiment, the hard circuit such as the volume, the amplifier, the comparator, etc. is shown as an analog circuit, but the device for A / D converting the input component, digital processing and computer processing (not shown). Can also be
The brush height, gain value, bias value, etc. may be digitized and displayed on the display.

The value of the brush height is delicate depending on the number of folded pages, the width of the signature (paper width), the basis weight of the paper (weight, thickness), the degree of processing of the paper surface, the state of ink, etc. It is different, and when these data are stored and the same type of folding work is performed as a repeat order, by inputting these data, the desired initial height value of the brush,
The gain can be preset.

Further, in the embodiment shown in the block diagram of FIG. 5, in the speed range exceeding a certain low speed, the gain is basically changed linearly with the increase of the speed of the machine. However, it is more preferable to store not a straight line as shown in FIG. 7 but several points on the way to the maximum speed so that the points change linearly or along a curve passing through these points.

[0030]

According to the brush control device of the present invention, the height of the brush can be automatically adjusted to the optimum position according to the speed of the printing machine or the folding machine, and the initial height position can be adjusted very easily. Therefore, folding accuracy and work efficiency can be significantly improved.

Further, in the case of the repeat order work, the height of the brush can be easily set only by inputting paper data, folding data, etc., so that the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of an entire folder including a device of the present invention.

FIG. 2 is a partially omitted perspective view of a chopper folding device incorporating a signature pressing brush control device of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a side view of a brush and a brush driving device of the signature pressing brush control device of the present invention.

FIG. 5 is a block diagram of a control system of the signature pressing brush control device of the present invention.

FIG. 6 is a diagram showing a relationship between brush height and speed of a printing machine or a folding machine.

FIG. 7 is another diagram showing the relationship between the height of the brush and the speed of the printing machine or the folding machine.

[Explanation of symbols]

 12 Chopper blade 17 Paper pad 24 Brush

Claims (8)

[Claims] 1. A folding machine connected to a web-fed rotary printing press, which comprises a chopper blade, a paper pad for controlling the positions of signatures, and signature holding brushes provided on both sides of the chopper blade whose height can be adjusted, or In a chopper folding device of a single folding machine, a means for detecting the speed of the folding machine or the speed of the rotary web printing press and a brush height adjusting means are provided, and the brush height adjusting means is the speed of the folding machine or the rotary press of the rotary press. A signature pressing brush control device for a folder, comprising a control means for adjusting the brush height according to the output from the speed detecting means. 2. The signature holding brush control device for a folder according to claim 1, wherein the heights of the signature holding brushes provided on both sides of the chopper blade can be independently adjusted. 3. A folding machine connected to a web-fed rotary printing press, which comprises a chopper blade, a paper pad for controlling the positions of the signatures, and signature holding brushes provided on both sides of the chopper blade whose height can be adjusted, or A chopper folding device for a single folder comprises means for detecting the speed of the folder or the speed of a rotary web printing press, brush height detecting means and brush height adjusting means, and the brush height adjusting means is a signature unit. With initial setting means that can initially set the brush height according to the type of
A signature pressing brush control device for a folding machine, comprising control means for automatically adjusting the brush height according to the output from the means for detecting the speed of the folding machine. 4. The signature holding brush control device for a folder according to claim 3, wherein the heights of the signature holding brushes provided on both sides of the chopper blade can be adjusted independently. 5. A folding machine connected to a web-fed rotary printing press, which comprises a chopper blade, a paper pad for controlling the positions of signatures, and signature holding brushes provided on both sides of the chopper blade whose height can be adjusted, or In a chopper folding device for a single folder, a means for detecting the speed of the folder or the speed of a web-fed rotary printing press, brush height detection means and brush height adjustment means are provided, and the brush height adjustment means is Width, paper thickness, paper type, number of pages, amount of ink, and other input means to input signature data, and paper width, thickness, type of paper, number of pages, amount of ink The data holding means that holds the brush height data, the selection means that selects the brush height data corresponding to this when the signature data is input at the start of work, and the selected brush height data. And Shimesuru display means, selecting, signature pressing brush control device of a folding machine, characterized in that it has a drive means for adjusting the even bets not a Ki brush height displayed brush height data. 6. The signature holding brush control device for a folder according to claim 5, wherein the heights of the signature holding brushes provided on both sides of the chopper blade can be adjusted independently. 7. A chopper for a folding machine connected to a web-fed rotary printing machine or a chopper for a single folding machine, which comprises a chopper blade and a paper pad for controlling the positions of the signature and signature holding brushes provided on both sides of the chopper blade. A signature pressing brush control device for a folding device, comprising: a motor for moving the signature pressing brush up and down; brush height detection means connected to the motor for detecting a motor rotation amount as a brush height; Or speed detection means for detecting the speed of the folder, brush height initial value input means,
Comparison means for comparing the target value, which is the sum of the output from the brush height initial value input means and the speed detection means, with the measured value, which is the output from the brush height detection means, and until the output of this comparison means becomes zero. A signature holding brush control device for a folding machine, comprising a motor driver that drives a motor that moves the brush up and down. 8. The height of the signature pressing brushes provided on both sides of the chopper blade can be independently adjusted and the same amount can be adjusted integrally.
Border control brush controller for the described folder.