JP2002240977A - Method and device for sheet guide for paper sheet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet guide device for a paper sheet printer, suppressing sheet flattering and paper rampage even in generation thereof in a guide clearance, which can make stable conveyance and smoothly convey a paper sheet even in the case that a printing surface not sufficiently dried after reversing is guided. SOLUTION: An air nozzle type sheet guide conveying a sheet while floating it from a sheet guide surface by jetting air to a guide clearance formed between the sheet and the sheet guide surface guiding the sheet and a bar-shaped sheet guide extended along on the guide surface of this air nozzle type sheet guide and along a conveying direction of the sheet are provided, this bar-shaped sheet guide is extended along a non-pattern location of the sheet, in this way, air is jetted to a guide clearance formed between the sheet and the guide surface guiding the sheet, the sheet is conveyed while floated from the guide surface, and in the case of generating flattering in the sheet conveyed while floated slightly from the sheet guide surface by a flow of jetted air, this sheet comes into contact with the bar-shaped sheet guide, an escape of air in a width direction of the sheet is impeded, by increasing an air pressure, floating force to the sheet is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-fed printing machine, which is installed along a sheet conveying line of an intermediate cylinder or a paper discharging unit, and stably prints sheets (sheets) downstream. The present invention relates to a sheet guide device of a sheet-fed printing press to be conveyed, and in particular, while blowing air into a guide gap formed between a sheet guide surface for guiding the sheet and a sheet to float the sheet from the sheet guide surface. The present invention relates to a sheet guide device of a sheet-fed printing press configured to be conveyed.

[0002]

2. Description of the Related Art Conventionally, there has been known a multicolor printing sheet-fed printing press in which a plurality of sets of printing devices having different ink colors are juxtaposed in tandem, and as shown in FIG. Paper device 31, plural sets of printing devices (14a), (14b) for cyan, magenta, yellow, black, etc.,
(14c) and (14n) are composed of a printing unit (14) arranged in tandem, a sheet stacking device 32 installed in the paper discharge device 16, and the like. Next, the respective functions will be briefly described with reference to FIG. 10. The sheet feeding device 31 stacks the sheets 1 as the printing objects on a sheet feeding table, and sequentially feeds the sheets 1 one by one to the next process. This is a device for supplying to the printing unit 14.

The next printing unit 14 usually has a plurality of printing devices 14a each provided with cyan, magenta, yellow, black ink and other special color inks.
To 14n are arranged in tandem along the sheet traveling direction, and the sheet 1 supplied from the paper feeding device 31 includes an impression cylinder 33 and an intermediate cylinder 15 provided in each printing apparatus.
Are sequentially conveyed to a downstream device via a not-shown claw device provided in the above, and inks of necessary colors are successively transferred onto the sheet 1 on the way. In each printing device 14,
After a necessary amount of ink is adjusted by an ink supply device (not shown), the ink is supplied to a printing plate 35 mounted on a plate cylinder 34, and the printing plate 3
5 is transferred to the blanket cylinder 36, and the ink on the outer peripheral surface of the blanket cylinder 36 is transferred to the sheet 1 being conveyed between the blanket cylinder 36 and the impression cylinder 33, whereby printing is performed. Is being done. Note that the sheet 1 after printing is conveyed to the paper discharge unit 16 downstream.

[0004] The next paper discharging unit 16 is composed of a sheet conveying device 37 and a sheet stacking device 32 as shown in FIG. FIG. 10 illustrates a type in which a sheet reversing cylinder 38 in which the reversing mechanism is omitted is installed between the above-described printing devices 14 and the printing devices 14. Two-color printing can be performed on both front and back surfaces. It has become. Under the above configuration, the sheet 1 on which the printing of the first color has been completed is transferred from the impression cylinder 33a of the first printing device 14a to the intermediate cylinder 15, and further transferred to the impression cylinder 33b of the second printing device 14b. Is printed in two colors on the surface. Thereafter, a predetermined number α is printed by the same printing device 14b, and then the sheet 1 is turned over via the reversing cylinder 38. Then, the reversed sheet on the back side is sequentially transferred to, for example, the n-th to n-th printing apparatuses, and multicolor printing of the desired number of colors α is performed on both the front and back sides.

[0005] Sheet 1 on which predetermined printing is completed as described above
Is transferred from the impression cylinder 33n of the final printing device 14n to the chain gripper 39 provided in the endless chain 19 that runs while winding the paper discharge shaft 17, and the sheet stacking device 32 is gripped by the chain gripper 39. After being conveyed to the discharge table, it is dropped and stacked on the discharge table. As shown in FIG. 10, the sheet stacking device 32 is provided with a paper pad 40 at the upper portion on the downstream side, and the sheet 1 conveyed while being held by the chain gripper 39 of the endless chain 19 is not shown. Is released from the chain gripper 39 and falls at an appropriate position (timing) in the sheet advancing direction via the paper release cam. Next, the front ends of the sheets are brought into contact with the paper abutment 40 so that the front ends thereof are aligned, and the sheets are stacked on the sheet discharge table of the sheet stacking device 32. By the way, a vacuum suction wheel 18 is installed at an upper entrance of the sheet stacking device 32. The peripheral speed (v2) of the outer cylinder constituting the vacuum suction wheel 18 is set so as to be slightly lower than the sheet traveling speed (v1). v1) is braked and decelerated.
Sheet 1
Function as means for controlling the attitude of the user.

Thereafter, a predetermined number of sheets 1 are stacked on the sheet discharge table of the sheet stacking device 32 and carried out. Next, a new pallet is placed on the empty discharge table and then raised to set it to the initial position.
Receive the sheet 1 temporarily supported by the partition plate,
The operation of the sheet stacking device 32 is restarted. Hereinafter, the same operation is repeated.

[0007] By the way, the sheet-fed printing press immediately after printing, that is, the sheet 1 in a state where the transferred ink is not completely dried.
In order to suppress the occurrence of troubles such as dirt and scratches on the sheet 1, for example, a lower part of an intermediate cylinder 15 provided between the printing devices 14 and a paper discharging device portion 16.
The sheet guide device is installed at a rising portion from the paper discharge shaft 17 to the vacuum suction wheel 18 and the like.

In the case of a double-sided printing machine, since printing is performed on both the front and back sides of a sheet, a highly sophisticated guide is particularly required for the sheet guide device. Various types of sheet guide apparatuses have been proposed today. First, as an example of a sheet guide device installed below the intermediate drum 15, there is a type shown in FIG. The illustrated device is provided with an air box 4 provided with a nozzle-shaped air ejection port 5 along the outer peripheral surface of the intermediate cylinder 15, and the lower end of the air box 4 is provided with an air outlet 13 of an air source 13 through a pipe 11. Connected to the side. The sheet guide device guides the sheet 1 by ejecting air from the nozzle-shaped air ejection port 5 when the sheet is conveyed. Such a sheet guide device has already been proposed in Japanese Patent Application Laid-Open No. H10-109404. Are arranged along the air box 4 and a plurality of nozzle-shaped air jets 5, 5,... Are arranged on the surface of the air box 4, and a sheet is fed from the air jets 5, 5. An airflow is discharged in the upstream direction to regulate the sheet at a predetermined position, thereby stabilizing the running of the sheet.

That is, according to the prior art, a direction along the sheet guide from the air outlets 5, 5,... Along the guide gap between the surface of the sheet guide having the air duct 06 on the lower surface and the intermediate body. The sheet 1 conveyed along the peripheral surface of the intermediate drum 15 is suctioned and slightly floated on the sheet guide surface side by the Bernoulli effect due to the difference in the flow velocity of the air flow between the upper and lower surfaces of the sheet. After being conveyed while being hindered, it is delivered to the impression cylinder 33 of the next stage.

Next, in the paper discharge unit 16, the paper discharge shaft 1
FIG. 9 shows an example of a sheet guide device installed at the rising portion from the vacuum suction wheel 7 to the vacuum suction wheel 18. In this apparatus, the air box 4 having the nozzle-shaped air jets 5, 5,... Formed on the sheet guide surface is disposed along the traveling path of the endless chain 19, and the air box 4 is connected via a pipe 11. Connected to an air source (blower) 13. Based on the above configuration, air is ejected from the nozzle-shaped air ejection port 5 when the sheet is conveyed, and the sheet 1 traveling while being gripped by the chain gripper 39 of the endless chain 19 is guided. is there.

[0011]

The sheet guide device exemplified above has various types such as those in which the nozzle-shaped air jet ports 5 are arranged in a staggered manner on the surface of the sheet guide, those in which they are arranged in a lattice, and the like. However, each had the following problems. That is, the fluttering of the sheet 1 changes depending on the type of quality of the printing material (sheet) 1 at the time of high-speed operation, the sheet 1 comes into contact with the guide only by air adjustment,
May be scratched. In particular, in the case of thin paper, the Bernoulli effect alone due to the flow velocity of the jetting air cannot stably hold the end of the thin paper. It is a big problem when guiding on an unprinted surface. In the case described above, if non-contact conveyance of a sheet is to be realized by air adjustment, the operation requires a considerably long adjustment time and often requires adjustment. Therefore, the amount of work increases, and the printing preparation time increases.

In view of the problems of the prior art, the present invention passes a sheet through a guide gap formed between the outer periphery of a printing cylinder and a sheet guide, and blows air from the air outlet of the sheet guide into the guide gap. In the sheet-fed printing press configured to allow the occurrence of sheet flutter or paper flutter in the guide gap, even if the occurrence of the flutter is suppressed immediately, enabling stable conveyance, as in double-sided printing, It is an object of the present invention to provide a sheet guide device of a sheet-fed printing press and a guide method thereof, which can smoothly convey even when guiding a printing surface that is not sufficiently dried after reversing.

[0013]

SUMMARY OF THE INVENTION In view of the above problems, the present invention guides a sheet in a sheet guide device of a sheet-fed printing press installed along a sheet conveying line of an intermediate cylinder or a sheet discharging device. An air nozzle type sheet guide that ejects air into a guide gap formed between the sheet guide surface and the sheet and conveys the sheet while floating the sheet from the sheet guide surface, and along the guide surface of the air nozzle type sheet guide, A sheet guide device for a sheet-fed printing press, comprising: a bar-shaped sheet guide extending along a sheet conveying direction, wherein the bar-shaped sheet guide extends along a non-pattern portion of the sheet. I do. In this case, since the non-pattern portion of the sheet is not constant on the stick and varies depending on the printing plate, the rod-shaped sheet guide is provided with a width direction moving means for moving in the sheet width direction orthogonal to the sheet conveying direction. Well, further comprising a driving means such as a motor, a position detecting means for detecting the moving position of the rod-shaped sheet guide, and a driving control means for controlling the driving of the driving means, in the widthwise moving means of the rod-shaped sheet guide, It is preferable that the bar-shaped sheet guide is configured to be controllable to move to a sheet non-picture part based on the position detecting means. Further, there is provided calculating means for calculating an appropriate position corresponding to the sheet non-picture part of the bar-shaped sheet guide from the picture data from the storage device into which the print picture data is taken, and based on the proper position signal from the calculating means, the rod-shaped sheet guide is provided. It is preferable to move the sheet guide to a non-picture part of the sheet.

According to the invention, in a sheet guiding method of a sheet-fed printing press for guiding a sheet along a sheet conveying line of an intermediate cylinder or a sheet discharging unit, a guide surface between the sheet and a sheet is guided. Air is jetted into the formed guide gap to convey the sheet while floating it from the guide surface, and a bar-shaped sheet guide is extended on the guide surface along the sheet conveying direction, whereby the air jetting is performed. When the sheet being conveyed while fluttering slightly above the sheet guide surface by the flow is fluttered, the sheet comes into contact with the rod-shaped sheet guide, thereby preventing air from escaping in the sheet width direction and preventing air from flowing. By increasing the pressure, the levitation force on the sheet can be increased, and as a result, sheet flapping or paper flapping of the guide gap occurs. Immediately suppress this, as well as enabling stable conveying, as double-sided printing, can be smoothly transported in the case for guiding the printing surface is not sufficiently dried after inversion. Of course, the rod-shaped sheet guide is a rod-shaped sheet guide that does not contact the back surface of the sheet during stable traveling by airflow, but contacts only when the sheet flutters, and the contact is a pattern portion of the printed sheet. Thereby, generation of scratches on the printed surface and damage can be prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, dimensions, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the invention, but are merely illustrative examples. A configuration of a sheet guide device according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 are explanatory views of the basic configuration of a sheet guide device installed in a sheet traveling path section of a sheet-fed printing press according to an embodiment of the present invention. FIG.
Is a side view. FIG. 3 is an explanatory view showing an application configuration example of the sheet guide apparatus of FIG. 1, and FIGS. 4 and 5 are explanatory views showing an installation example of the sheet guide apparatus of FIG. 1. FIG. FIG. 5 shows an example of installation in the paper discharge unit.

In the following embodiments, parts and portions common to those of the prior art shown in FIGS. 8 to 10 are denoted by the same reference numerals. 1 to 5, the sheet guide device of the present embodiment has a Bernoulli effect by giving a flow velocity difference between the upper and lower surfaces of a sheet by an air jet flowing in a direction along the sheet guide, which has been conventionally performed. In addition to the air nozzle type sheet guide device 2 which guides the sheet 1, a plurality of sets of rod-shaped sheet guide devices 3 for mechanically supporting the sheet are provided. A normally used air nozzle type sheet guide device 2 supplies compressed air to an air box 4 having a guide surface formed on an upper surface thereof for guiding a sheet, and a plurality of nozzle air outlets 5 provided on the guide surface. The compressed air is ejected along the guide surface to stabilize the running posture. As shown in the section of the related art, the shape of the nozzle-shaped air ejection port 5,
Or, various types are proposed depending on the arrangement,
Has been put to practical use.

In such an air nozzle type sheet guide device 2, the air pressure difference (pressure difference) between the upper and lower surfaces of the sheet 1 to be conveyed causes the static pressure on the guide surface to decrease, thereby guiding the sheet 1. As described above, the sheet 1 can be conveyed without contacting the guide surface at a position where the force with the air flow is balanced. And this embodiment is
In particular, the air nozzle type sheet guide device described above, that is,
By blowing air from the nozzle-shaped air ejection port 5 of the air box 4, the sheet 1 to be conveyed is configured to stably follow the guide surface with a predetermined gap, and along the sheet 1 conveyance direction. One or a plurality of extending bar-shaped sheet guides 6 are arranged slightly above the guide surface of the air box 4, and more specifically, the sheet 1
Are extended in the sheet 1 transport direction in parallel with the sheet width direction at positions not in contact with the pattern *.

More specifically, as shown in FIG. 1, when the sheet 1 has a pattern * on both left and right sides of the center line of the sheet width, the bar-shaped sheet guide 6 has one
A total of three papers, one each at both ends of the book and the sheet width, are arranged in parallel. The length of the bar-shaped sheet guide 6 extends at least a distance longer than the entire length of the sheet. On the other hand air box 4
Moves the central bar-shaped sheet guide 6 in the width direction.
It is arranged on both sides of the moving rail 7 of the book. The shape thereof is formed in a rectangular shape which is substantially the same as the left and right sides of the moving rail 7 or a rectangular space that is long in the width direction and sandwiched between the moving rails 7.

The sheet guide device 1 comprising the air box 4 has a sheet guide surface formed on an upper surface, and nozzle-like air ejection ports 5 are scattered and arranged on almost the entire surface of the sheet guide surface. The air outlets 5 are directed toward the upstream side in the direction opposite to the sheet conveying direction, and the air outlets 5 of the respective air boxes 4 face each other with the center line as a boundary, and face the sheet width end side. The air outlet 5 is configured to be able to discharge airflow along the guide surface. The air box and the bar-shaped sheet guide 6 are not necessarily formed separately, but may be formed integrally.

In this embodiment, as a basic structure of the rod-shaped sheet guide portion, as shown in FIGS. 1 and 2, three moving rails 7 are provided between the frames 20 located on both sides in the sheet conveying direction. A slider (movable table) 8 that extends across the lower sheet width direction and moves along the rail 7
After the columns 9 are vertically mounted on the respective columns, bar-shaped sheet guides 6 along the sheet conveying surface line are fixedly provided at the upper ends of the columns 9 respectively. In the figure, reference numeral 10 denotes a fixing screw, which can fix the slider (movable table) 8 at an arbitrary position on the rail 7. As a result, the three rod-shaped sheet guides 6 It is easy to move to a position that does not exist.

Incidentally, the above-mentioned lateral width moving device is shown in FIG.
The three sets of sliders 8 on one set of rails 7 as shown in FIG.
In this case, only one set of rails needs to be bridged, and the air box 4 may be two sets of the upstream side and the downstream side. Further, as shown in FIG. 3B, a form in which the movement of each bar-shaped sheet guide 6 is limited to only a minimum range required for position setting and the size is reduced is also possible. In this case, two sets of the air boxes 4 may be engaged with the cross section rectangular shape by removing the rails 7 on the upstream side and the downstream side, respectively. As the bar-shaped sheet guide 6, a round bar is used, or a polygonal material having a smooth contact surface at the sheet sliding contact portion, that is, a round material with rounded corners and smooth formed contact surfaces and edges, or a polygonal material having rounded corners. For example, a rod-shaped material having a smooth contact surface and an end can be adopted, such as using a kamaboko-shaped material.

The air nozzle type sheet guide device 2 installed between the bar-shaped sheet guides 6 has various known types.
4 and 5, the lower end of each air box 4 is connected to an air source 13 such as a blower via a pipe 11 and an electromagnetic valve 12. In addition, a regulator (not shown)
A structure in which a flow meter or the like is appropriately incorporated may be adopted. Next, a representative example of the installation location in the printing press will be described.

The location of the sheet guide device in the sheet-fed printing press is not limited to the space between the rod-shaped sheet guides 6 as long as the rod-shaped sheet guide 6 can be disposed on the sheet guide surface, as described in the section of the prior art. Various positions are possible. In the example shown in FIG. 4, the sheet guide device configured as described above is installed below the printing device 14 arranged side by side and the intermediate cylinder 15 provided in the middle of the printing device 14. In this embodiment, the sheet guide device constituted by the air nozzle type sheet guide device 2 and the bar-shaped sheet guide device 3 as described above is provided on the upper surface, that is, on the curved portion along the outer peripheral surface (trajectory) of the intermediate drum 15. . In the case of the present embodiment, a pair of air boxes 4 are distributed and arranged on the upstream side and the downstream side with the vertical lower line of the intermediate body 15 interposed therebetween, and the slider (movable platform) is provided below the vertical gap interposed between the two air boxes. ) 8 is arranged, and a support 9 is provided in the vertical gap from the slider.
The bar-shaped sheet guide 6 is arranged along the outer peripheral surface (trajectory) of the intermediate drum 15 at the upper end of the support 9 projecting above the air box sheet guide surface along the sheet conveying surface line.

Next, in the example illustrated in FIG. 5, the air box 4 having the nozzle-shaped air ejection ports 5, 5,... Formed on the sheet guide surface is disposed along the traveling path of the endless chain 19. In the apparatus shown in FIG.
6, the vacuum wheel 18 downstream from the paper discharge shaft 17
9 is the same as that in FIG. 9, but is divided into three air boxes 4 on the upstream and downstream sides of the vertically lower line of the paper discharge shaft 17 and the vacuum wheel 18 respectively. Then, a slider (movable table) 8 is arranged below a gap sandwiched by the air boxes facing each other, and a column 9 vertically penetrates into a vertical gap from the slider, and an upper end of the column 9 protruding above the air box sheet guide surface. Next, the bar-shaped sheet guides 6 are arranged along the outer peripheral surface (trajectory) of the intermediate cylinder 15 so as to be curved along the sheet conveying surface line. The air box 4 is connected to an air source (blower) 13 via a pipe 11, an electromagnetic valve 12, and the like, as in the prior art. With the above configuration, air is ejected from the nozzle-shaped air ejection port 5 during sheet conveyance, and the chain gripper 3 of the endless chain 19 is ejected.
9 to guide the seat 1 traveling while being gripped,
The configuration is the same as in the above example. In this embodiment, as described above, the bar-shaped sheet guide device 3 provided on the upper surface of the air nozzle type sheet guide device 2 in the sheet flow direction has a curved surface along the traveling path of the sheet 1 or a flat surface in the width direction. It is the same as the above-mentioned embodiment that a plurality is provided and the structure is such that it can be moved in the width direction according to the picture *.

Next, the operation of this embodiment will be described with reference to FIGS. When the sheet (printed paper) 1 is transported, the following operation is performed. First, as an initial setting, the bar-shaped sheet guide 6 is manually moved and set (fixed) corresponding to a position where there is no picture * in the width direction of the sheet 1 on the back surface of the printing paper. Next, the air source (blower) 13 is operated to increase the air pressure inside the air box 4, and the formed compressed air is discharged from the nozzle-shaped air outlet 5 formed in the air box 4. Subsequently, the printing apparatus 14 is operated, printing is started, and the sheet 1 is run. As a result, the sheet 1 is conveyed while being supported by both the airflow and the bar-shaped sheet guide 6. When the sheet 1 being conveyed while slightly levitating from the sheet guide surface while being levitated by air slightly flaps, the sheet 1 first comes into contact with the rod-shaped guide 3, whereby the escape of air in the lateral direction is hindered and the air is hindered. When the pressure is increased, the force for floating the sheet 1 is increased, and the contact of the sheet 1 with the air nozzle type sheet guide 2 is avoided. Thereby, it is possible to prevent the picture * portion from contacting the guide and causing a scratch to be damaged.

Therefore, according to the present apparatus, the sheet 1 flutters by providing the bar-shaped sheet guide 6 which does not contact the rear surface of the seat during stable running but contacts the handle portion when the sheet flutters. Also, it is possible to prevent the pattern * portion of the printed matter from contacting the air nozzle type sheet guide 2, so that the occurrence of waste paper can be suppressed. In order to suppress the occurrence of waste paper only with the conventional air nozzle type sheet guide 2, it is necessary to always finely adjust the air, and the adjustment may vary depending on the type of sheet 1 to be printed and various conditions on the printing day. The amount of work required to maintain a good condition was large, but the amount of work was significantly reduced.

Also, conventionally, a picture *
Since the time of occurrence of damage due to contact with the site cannot be predicted, all inspections are required and all of them are extracted. Therefore, the amount of work after printing is large, but the amount of work is greatly reduced because scars hardly occur. Therefore, according to this embodiment, the quality of the printed matter is improved and the sense of security of the work can be increased by eliminating the occurrence of scratches on the sheet pattern *. For example, various effects can be obtained, and in particular, those that guide a printed surface of a double-sided printing machine are suitable.

FIG. 6 is an explanatory diagram showing the configuration and functions of a sheet guide device according to a second embodiment of the present invention. In the second embodiment, in addition to the configuration of the first embodiment shown in FIGS. 1 to 5, moving means 24, 26, and 28 and a position detecting means 21 for the bar-shaped sheet guide 6 are provided, and the bar-shaped sheet guide 3 is controlled by remote control. The position in the width direction can be set. The bar-shaped sheet guide 6 illustrated in FIG. 6 spans a plurality of sets of moving rails 7 in the lateral direction of the apparatus in the same manner as in the first embodiment, and attaches a support 9 to each of the sliders 8 that move along the rails 7. The point that the bar-shaped sheet guide 6 along the sheet path line is fixed to the upper end of the support 9 is the same as in the above-mentioned prior art.

At the lower end of the slider 8, a bracket 24 formed with a female screw is fixedly mounted, and a transfer screw 26 such as a ball screw whose both ends are supported by bearings 25 is screwed to the female screw. A position detecting means 21 such as an encoder and a motor 28 are connected outside the frame 20a at the shaft end of the conveying screw 26. The position detecting means 21 functions to measure the number of rotations of the motor 28 and the conveying screw 26 and detect the amount of movement of the slider 8, that is, the position of the bar-shaped sheet guide 6 in the width direction of the apparatus. It is preferable to adopt a ball screw or the like as the transport screw 26 in order to reduce rotation resistance (torque), but the present invention is not limited to this.

Reference numeral 27 denotes an operation panel.
Sheet 1 on the side in contact with guides 2 and 3 of the pattern * to be printed on
And a display device 44 for recognizing a portion having no picture * in the entire traveling direction of the vehicle and operating the button for moving the bar-shaped sheet guide 3 to that position and displaying the current position by a signal of the position detecting means 21. . The drive control device 23 drives the motor 28 to move the rod-shaped sheet guide 3 to a position where the above-mentioned pattern * does not exist in accordance with an instruction from the operation panel 27. The moving amount of the bar-shaped sheet guide 6, that is, the position in the device width direction can be confirmed by a measurement signal from the position detecting means 21 provided in the motor 28, and is displayed on the display device 44. As another configuration example, the position detecting means 21 is separated and independent from the motor 28,
6 may be installed at another position where rotation can be measured.

By the way, the size and form of the printing paper (sheet size, layout of the picture * to be printed, etc.), that is, the position where the picture * is not present on the printing paper are usually determined by the model of the sheet-fed printing press (the size of the sheet adopted). ) May be limited to a plurality of types, in which case, as an application example, the manual input may be selected from several types of positions and preset.

When the sheet 1 is conveyed, first, the position of the bar-shaped sheet guide 6 is input from the operation panel 27, and the motor 28, which is a moving means, is operated via the drive control device 23. The slider 8 to which the bar-shaped sheet guide 6 is attached is moved by the screw 26.
The movement amount of the slider 8, that is, the position of the bar-shaped sheet guide 6 in the apparatus width direction is read by the position detecting means 21 provided at the rear end of the motor 28, and the current position is displayed on the operation panel 27.

By the above operation, the bar-shaped sheet guide 6 can be moved and fixed in advance corresponding to a position where there is no picture * in the sheet width direction on the printing paper. Next, the air source (blower) 6 is operated to increase the air pressure inside the air box 4, and the formed compressed air is discharged from the nozzle-shaped air outlet 5 formed in the air box 4.

After the completion of the preparation stage, the printing press (apparatus) is operated in the same manner as in the above-described embodiment, and the sheet 1 is caused to travel along the upper surface of the sheet guide, that is, along the traveling path (trajectory) of the sheet 1. The same effect as in the first embodiment can be obtained. In addition to this, according to the present embodiment, it is possible to remotely set the position of the bar-shaped sheet guide 6 in the sheet width direction, thereby reducing setting mistakes and greatly reducing labor.

FIG. 7 is an explanatory view showing the configuration and functions of a seat guide device according to a third embodiment of the present invention. The configuration of the third embodiment will be described with reference to FIG. In the third embodiment, in addition to manual input of the set position of the bar-shaped sheet guide 3 to the data input device 22, a production management system (upstream management system) 30 provided in a factory is connected, and the system 30 The data is taken in, and the position of the bar-shaped sheet guide 6 is automatically set.

The production management system 30 has a quality management function, a printing machine operation status management function, a print preparation function, and various other management functions. The data is transmitted to the input device 22 and stored in the storage device 41. The storage device 41 also stores a processing procedure, a guide position selection criterion, and the like, and searches through all colors of the pattern data on the guide 3 side according to the processing procedure according to a command from the control device 42, and finds a portion where there is no pattern * in the sheet conveyance direction. The information is selected by the arithmetic unit 29 based on a selection criterion in which the positions are properly arranged so that the support is properly arranged. The information is transmitted to the output unit 43. The selected position information sent to the output device 43 is sent to the drive control device 23, and the drive control device 23 moves the rod-shaped guide 6 to the position selected based on the data of the position detection means 21 by the motor 28. I have.

According to the bar-shaped sheet guide device 3 of the third embodiment, when the sheet 1 is conveyed, first, as an initial setting, a picture data signal is controlled from an upstream system such as the production management system 30 sent out in order change or the like. It is transmitted to the input device 22 of the device 42, and the arithmetic device 29 calculates the moving position of the bar-shaped sheet guide 6. next,
The calculation result of the calculation device 29 is transmitted from the output device 43 to the drive control device 23, and the moving means 2 of the rod-shaped sheet guide 6 is moved.
6 and 28 are driven and stopped at a desired position by a signal of the position detecting means 21. Hereinafter, the same operation as in the second embodiment is performed. As a result, in the third embodiment, in addition to the same effects as those of the second embodiment, input of data necessary for positioning of the bar-shaped sheet guide 6 is received from an upstream system such as a production management system 30 in a factory, and arithmetic control is performed. Since the guide 6 is preset in advance, there is no need to manually input image data. This eliminates erroneous operations associated with data input in the initial setting, eliminates the need for manual correction work, shortens the setting change time, and enables significant labor savings.

[0038]

As described above, according to the present invention, a sheet is passed through a guide gap formed between the outer periphery of the printing cylinder and the sheet guide, and air is blown from the air outlet of the sheet guide into the guide gap. In the sheet-fed printing press configured to eject, even if sheet flapping or paper flapping occurs in the guide gap, it is suppressed immediately, enabling stable conveyance, as in double-sided printing. In addition, even when the printing surface that has not been sufficiently dried after the reversal is guided, it can be smoothly conveyed.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a basic configuration of a sheet guide device installed in a sheet traveling path section of a sheet-fed printing press according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an explanatory diagram showing an application configuration example of the sheet guide device of FIG. 1; (A) is a type in which three sets of sliders are incorporated on one set of rails, and (B) is a type in which each bar-shaped sheet guide is limited to a minimum range that requires movement and is downsized.

FIG. 4 is an explanatory view showing an example of installation of the sheet guide device of FIG. 1, showing an example in which the sheet guide device is installed below an intermediate drum.

FIG. 5 is an explanatory view showing an example of installation of the sheet guide device of FIG. 1 and shows an example of installation in a sheet discharge unit.

FIG. 6 is an explanatory diagram showing a configuration and functions of a sheet guide device according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a configuration and functions of a sheet guide device according to a third embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a configuration example of a sheet guide device installed below an intermediate cylinder located between printing devices arranged side by side in a conventional sheet-fed printing press.

FIG. 9 is an explanatory diagram illustrating a configuration example of a sheet guide device installed at a discharge unit entrance of a sheet-fed printing press.

FIG. 10 is an explanatory diagram of the overall schematic configuration of a general sheet-fed printing press.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet 2 air nozzle type sheet guide device 3 rod-shaped sheet guide device 4 air box 5 nozzle-shaped air ejection port 6 rod-shaped sheet guide 7 rail 8 slider (movable table) 13 air source (blower) 14 printing device 16 paper discharge device 17 discharge Paper shaft 19 Endless chain 21 Position detection means 23 Drive control device 29 Computing device 30 Production management system 37 Sheet transport device 38 Reversing cylinder 39 Chain gripper 41 Storage device 42 Control device 43 Output device 44 Position display means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor: Manabu Imai 5007 Itozakicho, Mihara City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Paper and Printing Machinery Division F-term (reference) 2C020 AA04 AA13 2C250 EA36 EB33 EB50 3F101 FA01 FB02 FC03 FC07 LA06 LB03 3F106 AA17 AB02 AC02 AC26 AD05 CA04 CA16 CA16 CA23 LA06 LB03

Claims (6)

[Claims] 1. A sheet guide device of a sheet-fed printing press installed along a sheet conveying line of an intermediate cylinder or a sheet discharging device, wherein a guide gap formed between a sheet guide surface for guiding the sheet and the sheet. An air nozzle type sheet guide for ejecting air onto the sheet guide surface to convey the sheet while floating from the sheet guide surface, and a bar-shaped sheet guide extending along the sheet conveying direction along the guide surface of the air nozzle type sheet guide. A sheet guide device for a sheet-fed printing press, characterized in that the bar-shaped sheet guide extends along a non-picture portion of the sheet. 2. A sheet guide device for a sheet-fed printing press according to claim 1, wherein said rod-shaped sheet guide is provided with a width direction moving means for moving in a sheet width direction orthogonal to a sheet conveying direction. . 3. The widthwise moving means of the rod-shaped sheet guide includes a driving means, a position detecting means for detecting a moving position of the rod-shaped sheet guide, and a driving control means for controlling driving of the driving means. 3. The sheet guide device for a sheet-fed printing press according to claim 2, wherein the bar-shaped sheet guide is configured to be able to control the movement of the bar-shaped sheet guide to a sheet non-picture part based on the position detecting means. 4. A calculating means for calculating an appropriate position corresponding to a non-sheet part of the sheet of the bar-shaped sheet guide from the picture data from the storage device into which the print picture data is taken, and an appropriate position signal from the calculating means is provided. 4. The sheet guide apparatus for a sheet-fed printing press according to claim 3, wherein the bar-shaped sheet guide is moved to a non-pattern portion of the sheet based on the sheet guide. 5. A sheet guide method for a sheet-fed printing press for guiding a sheet along a sheet conveying line of an intermediate cylinder or a sheet discharging device, wherein a guide gap formed between the guide surface for guiding the sheet and the sheet. The sheet is conveyed while being lifted from the guide surface by blowing air to the sheet guide surface, and a bar-shaped sheet guide is extended on the guide surface along the sheet conveyance direction. When fluttering occurs in the sheet being conveyed while slightly rising, the sheet comes into contact with the rod-shaped sheet guide, thereby preventing air from escaping in the width direction of the sheet and increasing the air pressure. A sheet guide method for a sheet-fed printing press, wherein a levitation force on a sheet is increased by the method. 6. The bar-shaped sheet guide is a bar-shaped sheet guide which does not come into contact with the back surface of the sheet when the vehicle is running stably due to an air flow, but comes into contact only when the sheet flutters, and the contact is a pattern of a printed sheet. 6. The sheet guiding method for a sheet-fed printing press according to claim 5, wherein the part is a part.