JPS61145042A - Paper piling position control device for leaf printing machine - Google Patents

Abstract

PURPOSE:To enable the position of piled sheets of paper to be controlled accu rately permitting the printing quality to be augmented by enabling sensors to be positioned in place based on the size of paper, and also enabling the position of paper end to be controlled by means of simple operations combined with sensor detection after it has been once positioned. CONSTITUTION:Sensor holders 60 and 61 are screwed into a screw shaft 57 which is located just above sheets of paper 22 piled on a pallet 21 that is placed on a paper pile table 12, and two sensors 64 and 65 are arranged on the holders. For example, a motor 24 starts rotating with a minimum size paper botton depressed allowing the sensor holders 64 and 65 to move from a dot-dash line to a solid line as shown in the figure. On paper starting to be fed, both the sensors 64 and 65 generate two different signals at the time when the end of paper is detected by both the sensors or is not detected by both the sensors allowing the motor 33 to rotate normally or reversely. This permits the pallet 21 to move to right and left so as to control the position of paper. This allows paper to be simply positioned in place between both the sensors 64 and 65 enabling the printing quality to be augmented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a sheet-fed printing press that is used when the size of paper stacked on a paper stacking table in a paper feed section via a pallet is changed. The present invention relates to a paper stack position regulating device that moves stacked papers to the correct position and corrects the paper to the correct position if the paper is misaligned in the left-right direction during printing.

[Conventional technology]

During printing work using a sheet-fed printing press, the paper stacked on the paper stacking table in the paper feed section via a pallet is sucked one by one from the top layer by a sucker device and sent onto the interfering plate, where the paper is pre-malignant. After the horizontal and vertical positions are regulated by the horizontal and horizontal needle devices, the sheets are picked up one by one by the claws of the swing device and fed to the printing unit. A good image is formed on the printing plate and printed by transferring it directly or via a rubber cylinder.

Figure 6: Paper stacking table and horizontal needle device of a sheet-fed printing press.

FIG. 3 is a plan view showing the state of paper at each position on the plate cylinder,
IA shows the whetstone loaded on the paper feed section 20 and the paper stacking table 3 via the pallet 4! IB indicates a sheet of paper whose edge is being calibrated by a gauge 6 of a transverse needle device 5 provided at the tip of the insert plate. Furthermore, 1C shows the paper being printed by the printing plate 8 mounted on the surface of the plate cylinder T. Of these, the horizontal needle device 5 is equipped with a pair of upper and lower rollers that rotate near the gauge 6.
The ends of the paper 1B are drawn in by the rotation of the upper and lower rows 2 and brought into contact with the gauge 6, thereby aligning the ends of the paper. The amount of paper pulled in by the horizontal stitching device 5 is generally set to about 5 to 6 mm. Retraction is possible.

Therefore, if the paper size is changed, the square plate cylinder 7
After setting the mounting position of the printing plate 8 to the correct position using the adjustment screw provided on the plate vise device, the position of the paper stacking table 3 is adjusted based on this, and then the position of the paper stacking table 3 is adjusted. Adjust the horizontal needle device 5 so that the gauge 6 is at the correct position based on the position of . By doing this, the left and right paper edges of the papers IA, IB, and IC at each position are located on a straight line orthogonal to the plate cylinder core or within its left and right tolerance range, and printing is performed at the correct position.

Furthermore, even if the printing operation is started after making the adjustment in this way, as shown in FIG. 7, which is an enlarged front view of A in FIG. In this case, depending on the direction of inclination, the paper end may collide with the gauge 6, or it may be out of the drawing range of the roller and not be drawn in), or the paper may become jammed or Since a large amount of paper misregistration results in a large amount of wasted paper, it is necessary to always adjust the paper stacking position to be correct. [Problems to be Solved by the Invention] However, in the conventional paper stacking position adjustment device, the operator manually moves the paper stacking table without looking at the paper feeding state while standing in the paper feeding section. Because of this, it took a lot of effort to adjust the paper size and correct the misalignment of the paper stacking position, which not only reduced the operating rate of the machine and hindered labor savings, but also made it difficult to stack the paper correctly. The drawback is that it is difficult to adjust the position and a lot of paper is wasted during this process.

[Means of mourning to resolve problems]

At least a pair of sensors are arranged in parallel at a predetermined interval in the paper width direction above the good paper stacked on a pallet on a paper stacking table,
Both sensors are configured to integrally move left and right by an operation corresponding to the size of the paper, and an engagement means is provided that moves the pallet left and right through a drive means that rotates forward and reverse based on different signals from these sensors. Established.

[Effect]

When you start feeding paper after positioning both sensors above the edge of the paper using operations appropriate to the paper dimensions, different signals will be emitted depending on whether both sensors detect the edge of the paper or when neither sensor detects the edge of the paper. These signals cause the drive means to rotate in the forward direction or in the reverse direction, and the pallet is moved left and right through the engagement means, so that the paper is calibrated so that the edge of the paper is located between both sensors, and then the horizontal needle is moved. sent to the device.

〔Example〕

1 to 5 show an embodiment of the paper stack position regulating device according to the present invention, FIG. 1 is a front view thereof, FIG. 2 is a plan view thereof, and FIG. 3 is a side view of the main parts, FIG. 4 is an AA cross-sectional view of the main part of the butterfly 1, and FIG. 5 is an enlarged cross-sectional view of the vicinity of the sensor. In the figure, the paper stacking device, which is generally designated by the reference numeral 11, is 4
A paper stacking table 12 is provided with a rectangular plate 12m having a notch in the corner and a vertical member 12b bolted to both edges thereof, and a pair of square plates 13a are installed in the center of each vertical member 12b. Lifting plates 13 formed by connecting four positive plates with guide pins 13b are each fixed by lower guide bins 13b. On the other hand, a long guide bar 15 is vertically fixed to the left and right feeder frames 14.
2 is supported so that it can be raised and lowered by engaging left and right lifting plates 13 with a guide bar 15. And paper stacking table 1
2 is suspended at its four corners by a lifting chain (not shown), and is configured to be raised and lowered guided by a guide bar 15 by manual operation or motor drive based on detection of the top surface of the stacked paper. The lower limit of the paper stacking table 12 is set so that it can enter the bit 17 lower than the floor surface 16, as indicated by the reference numeral in FIG. A plurality of guide rollers 18 are rotatably supported in the bit 1T via a bracket 19, and the height is set so that the upper end thereof is flush with the floor surface 16. , a plurality of roller holes 20 (in this embodiment, a total of 12 holes in 4 columns and 3 rows) are bored in the paper stacking table 12.
By engaging the paper stacking table 12, it is possible to lower the paper stacking table 12 below the floor surface. Reference numeral 21 is a pallet made of iron plate, which is loaded with paper 22 and mounted on the paper stacking table 12, and is reinforced by a frame material and has a recessed part on the lower surface that allows it to be scooped up by a forklift, etc. After this pallet 21 is transported by a forklift or the like to the position indicated by the reference numeral 21A in FIG. The pallet 21 moves while rolling the guide rollers 1B protruding from the paper stacking table 12.

Reference numeral 23 denotes a plurality of front alignment bars that align the front edges of the paper 22 by bringing the front end surfaces of the pallet 21 and the paper 22 into contact with each other, and are arranged vertically in parallel by a stay 24 or the like that connects the left and right feeder frames 14. It is supported by In FIG. 3, the raised position of the pallet 21 is shown by a solid line), and the lowered position is shown by a chain line. Further, regarding the paper 22, the largest paper is shown by a solid line, and the smallest paper is shown by a chain line.

Then, the paper stacking table 12 has a roller that supports the pallet 21 when it is raised, a magnet that fixes the pallet 22, and a signal from a sensor of a detection section that will be described later to move the pallet 22 in the left and right direction and position it correctly. A regulating device is attached. That is, the plate 12m of the paper stacking table 12 has a plurality of roller holes 2 (in this embodiment, a total of 12 holes in 2 columns and 6 rows).
A rotatable support roller 27 mounted on the back surface of the plate 12m via a bracket 26 is engaged in the roller hole 25. The height of the support rollers 27 is set so that there is a gap between the pallet 21 and the guide rollers 18 when the pallet 21 is seated on the guide rollers 18. When raised, the support rollers 27 come into contact with the pallet 21 and raise it together, and are configured to support the pallet 21 so as to be movable in the left and right direction.

Furthermore, a plurality of (four in this embodiment) magnet holes 28 are bored in the plate 12& of the paper stacking table 12, and a support stand 29 is inserted into the magnet hole 28 on the back side of the plate 12m. A cylindrical magnet 30 supported through is engaged. , this magnet 30 is excited by the bullet 21
When the pallet 21 is seated on the guide rollers 18, the guide rollers 1
Magnet 30 and pallet 2 so as not to interfere with B's transfer.
Although a gap is formed between the pallet 1 and the pallet 1, the gap is set small so that suction force acts on the pallet 21 even in this case. Then, excitation of the magnet 30,
Demagnetization is performed at predetermined timing by a control device.

A pair of brackets 31.3 are attached to the plate 12a of the paper stacking table 12.
2 is located and fixed at the center of the back surface, and a motor 33 is fixed to one bracket 31 as a means for driving the paper stacking table horizontally. ing.

A screw shaft 34 extending in the direction of both feeder frames 14 is pivotally supported on both platens 31 and 32, and a gear 35 attached to this screw shaft 34 meshes with a gear 36 on the motor shaft. ing. 37, a pair of bars extending in a direction perpendicular to the screw shaft 34 by screwing female screw members 37m onto threaded portions at both ends of the screw shaft 34, and each bar 37 has four corners at both ends of the plate 12&. A slidable support portion on a support shaft 39 supported via a bracket 38 is engaged with the support portion.

A claw holder 40 is attached to each end of the left and right support shafts 39.
A nail 42 is fixed to the tip of each nail holder 40 with a nut 41 perpendicular to the pallet 9, and stands upright with its upper end facing the lower end of the pallet 21. By doing this, when the motor 33 is rotated, the gear 36.
The screw shaft 34 rotates through the screw 35, and due to its screw action, υ
The left and right pars 31 are configured to move in the same direction while sliding the support portions at both ends on the support shafts 39, and push the pallet 21 with the claws 42 to move it. In this case, the pallet 21 moves while rolling the support rollers 27, and the moving direction differs depending on the rotational direction of the motor 33. 43.4
4 is attached to the rear end of the board 12m in two places on the left and right, and the motor 33
A limit switch connected to the power supply of
The cutter has a plate (4) fixed to the claw holder 40.
5 and 46 are in contact with each other, and serve as a safety device that operates at the limit of left and right movement of the pawl 42 to stop the motor 33. Reference numeral 47 denotes a horizontal support that is manually moved in the left-right direction to abut both ends of the paper 22 when changing the paper size.

Next, the detection section for regulating the paper stack position will be explained.

Between the left and right feeder frames 14, two stays 48 and 49, large and small, are supported and positioned above the front aperture 23 that regulates the front end of the paper 22. 49 is connected at four locations in the middle by brackets 50 and 51. Also, one of the brackets 50 and another bracket 52 fixed to the stay 48
A motor stand 53 is supported between the two, and a motor 54 is fixed on this motor stand 53, which rotates at a predetermined number of revolutions by operating a push button selected according to the paper size. There is. A motor shaft 55 of the motor 54 passes through the stay 48 and is supported at its lower end by a bracket 50), and a bevel gear 5 is attached to the lower end of the motor shaft 55.
6 is mounted on the shaft. Further, between the four brackets 50, a screw shaft 57 having a right-hand thread 57m and a left-hand thread 5Tb on the left and right is rotatably supported with its intermediate portion connected by a coupling 58. A bevel gear 59 pivotally attached to the shaft 57 meshes with a bevel gear 56 of the motor shaft 55. 60.61 is a right-hand thread 57m of screw shaft 5T
and a left-hand screw 57b, each sensor holder is screwed into the sensor holder 6, and its rotation is regulated by a support shaft 62 supported parallel to the screw shaft 57.
An L-shaped support plate 63 is bolted to 0.61.

Two sensors 64 and 65 are attached to each support plate 63 in close proximity to the front end of the upper surface of the raised paper 22).
, a photoelectric switch is used in this embodiment. These Sen? 64 and 65 are arranged so as to be out of phase with each other in the front-rear direction, as shown in an enlarged plan view in FIG.

That is, as mentioned above, a horizontal needle device (not shown) is provided between the paper stacking device 11 and the printing unit.
When the amount of retraction by the roller is about 5 to 6 mm, # and alignment according to the gauge will be best.
It is necessary to adjust the paper stacking position so that the edge of the paper comes to this position, and the distance t between the gauge position of the horizontal needle device and the edge of the paper 22, indicated by the symbol in FIG. 5, is about 5 to 6 mm ± 2 mm. The paper stacking position is regulated so that For this purpose, the symbol ts+t! in FIG. The distance between the two sensor lengths 64.65 is set to about 4 mm), and the motor 33 is configured to stop only when only the inner sensor 64 detects the presence of the paper 22. Then, when the paper 22 moves inward and the sensors 64 and 65 no longer detect the paper 22,
The motor 33 rotates forward by a predetermined number of rotations in response to a signal from the sensor 64, and the paper 22 moves outward together with the pallet 21.
Tul t! are adjusted to the illustrated positions so that both are about 2 mm. Furthermore, when the paper 22 moves outward and the cents 64 and 65 both detect the paper 22, the motor 33 rotates in the opposite direction by a predetermined number of rotations in response to a signal from the cents 65, and the paper 22 moves inward together with the pallet 21. It is configured to move and be regulated to the illustrated position where both tt I 'tz are about 2 mm.

1 is a limit switch supported by an intermediate frame 67 that connects the stays 48 and 49, and is a limit switch that touches the upper surface of the paper 22 at the upper limit of the rise of the paper stacking table 12 that is raised and lowered by the lifting device. Furthermore, a pair of left and right limit switches 68 and 69 are supported on the bracket 50, and the center/sensor holder 61 comes into contact with these at the limit of left and right movement. By doing so, the motor 54 is stopped to prevent overshooting. The one indicated by the symbol TO is supported by the bracket 50 and has a bevel gear 71 between it and the screw shaft 5T.
．． An encoder connected for driving at 72 and connected to the control device is configured to memorize the rotation of the screw shaft 5T, that is, the amount of movement of the sensors 64 and 65, and send a signal to the control device. has been done.

The operation of the paper stack position regulating device configured as described above will be explained by taking as an example the case where the paper size changes from the largest paper to the smallest paper. First, the horizontal needle device (not shown) is moved inward and adjusted so that its gauge comes to the line position shown in FIG. 5, which corresponds to a predetermined position on the printing plate. Next, when the push button for minimum paper is pressed, the Tanabata 54 rotates, and the rotation of the screw shaft 57 moves the sensor holder 60.61 from the chain line position to the solid line position in FIG. It stops at the position shown in FIG. 5, where the center is 5 to 6 mm away from the line. Therefore, the paper 22 is loaded in the center position of the pallet 21 and
The paper stacking table 12 is transported to the rear of 2 and stopped at the lowered position.
When pushed upward, the pallet 21 moves while rolling the guide rollers 18, hits the front bar 23, and stops.

In this state, the magnet 30 is excited to attract and fix the pallet 21 to the paper stacking table 12 side, and then the lifting device moves the pallet 21 onto the paper stacking table 12.
When the pallet 21 is raised, the pallet 21 also rises via the support rollers 2T, and the upper surface of the paper 22 comes into contact with the limit switch 66, thereby stopping the motor and stopping the paper stacking table 12 from rising. Therefore, when the sensor 64, 65 is turned on, the magnet 30 is demagnetized, and the sensor 64, 65 detects the edge of the paper 22, and the edge of the paper goes too far inward and comes off both sensors 64, 65. If the motor 33
rotates forward and the claw 4 is rotated through the gear 36.35 and screw shaft 34.
2 moves to the left in the figure together with the bar 37. Therefore, when the pallet 21 moves to the left while rolling the support rollers 2T and the end of the paper comes between the sensors 64 and 65,
The motor 33 is stopped by the signal from the center 64, and the paper stacking table 1
2 stops with the paper 22 regulated at the correct paper stacking position.

Also, if the edge of the paper goes too far outside, both sensors 64 and 65
If this is detected, the motor 33 is rotated in the opposite direction by a signal from the sensor 65, and the pawl 42 is moved to the right, thereby regulating the paper stacking position. At the same time as the regulation, the magnet 30 is excited and the pallet 21 is fixed.

When the printing operation is started, a sucker device (not shown) sucks up the paper 22 one by one from the upper layer and sends it onto the interfering plate.
It is captured by the upper and lower rollers of the horizontal needle device and pulled into contact with the gauge. In this case, since the paper stacking position is regulated, the paper end passes through a position 5 to 6 mm from the gauge, and the paper 22 is drawn in well by the row 2 and its position is correctly regulated by the gauge. The paper 22 calibrated by the horizontal needle device is fed to the printing unit and printed at the correct position.

If the paper edge position shifts due to paper stacking failure as shown in FIG. 7 during printing, the sensors 64 and 65 detect the paper edge and the magnet 30 is energized and demagnetized simultaneously in the same manner as described above. , the paper stacking position is regulated. Then, the paper stacking table automatically rises as the paper is fed, and when the paper 22 runs out and the pallet 21 comes into contact with a limit switch (not shown), the printing unit performs body removal, and the paper stacking table 12 lowers. It stops at the lower limit position shown in FIG. 3 by the action of a limit switch (not shown). Therefore, when the magnet 30 is demagnetized and the pallet 21 is pushed by a pushing device (not shown), the pallet 21 is pushed out of the machine while causing the guide rollers 18 to roll.

When the paper 22 that has been subjected to front printing in this manner is stacked after being ejected and turned upside down and fed to the paper feed section again to perform back printing, the paper edge regulation side of the paper 22 is Since it is on the right side of the figure, the sensors 64 and 65 on the sensor holder 60 side on the right side are used, and the horizontal needle device on the right side is also used.

Note that in this embodiment, the sensors 64.6
5 is provided in pairs on both the left and right sides, but in the case of a printing machine that does not carry out reverse E' printing, it is only necessary to provide them on one side.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a paper stack position regulating device for a sheet-fed printing press, at least one pair of sensors are installed above the paper stacked on the pallet on the paper stacking table in the paper width direction. These sensors are placed side by side with an interval of Both sensors emit different signals when the paper edge is detected, and the pallet is moved left and right through forward and reverse rotation of the drive means to adjust the paper edge position. Positioning and paper edge position adjustment after positioning can be performed with simple operations and sensor detection, which improves machine operation rate, saves labor, and significantly reduces the amount of paper waste during adjustment. decreases to In addition, the paper stacking position is accurately regulated and the quality of printed matter is improved.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the paper stack position regulating device for a sheet-fed printing press according to the present invention, and FIG. 1 is a front view thereof, and FIG.
The figure is also a plan view, Figure 3 is a side view of the main parts, and Figure 4 is a side view of the main parts.
The figures are an AA cross-sectional view of the main part of Figure 1, Figure 5 is an enlarged cross-sectional view of the vicinity of the sensor, Figure 6 is a plan view showing the state of paper at each position of the paper stacking table and the horizontal stitching device 9 plate cylinder. FIG. 7 is a front view from A in FIG. 6 showing a paper stacking defect. 11φ...φ paper stacking position, 12...paper stacking stand, No. 21...
...Pallet, 22...Paper, 33...Motor,
42...fist/claw, 54...fist motor, 60,61...
・-Sensor holder, 64°65...Sensor 0

Claims (1)

[Claims] A pallet with paper stacked in the center in the left-right direction is mounted on a paper stacking platform so as to be movable left and right, and the paper feeding device supplies the paper to the printing unit via a horizontal needle device while raising the paper stacking platform. In a sheet-fed printing press, the paper is placed above the paper stacked on the pallet and arranged side by side at a predetermined interval in the width direction of the paper, and is integrally moved left and right by an operation corresponding to the size of the paper. At least a pair of sensors positioned on both sides sandwiching at least one side edge, which generate different signals when both sensors detect the paper edge and when neither sensor detects the paper edge. a sensor that emits a signal; a drive means that rotates forward in response to a signal from one of the sensors and rotates in a reverse direction in response to a signal from the other sensor; A paper stack position regulating device for a sheet-fed printing press, comprising: an engaging member for regulating the paper edge so that it is positioned between the two sensors.