JP2003231244A - Corrugated sheet printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugated sheet printer for small lot production by one printing unit without the need of a printing die or circulation of an ink. <P>SOLUTION: The corrugated sheet printer comprises an ink head for jetting a desired liquid ink to a corrugated sheet from a position away from the corrugated sheet being conveyed, an ink pump, an ink tank, and a control unit for controlling the ink jetting operation from the ink head with respect to an image to be printed, wherein the ink is jetted from the ink head to the corrugated sheet being conveyed with the printing image developed in the machine width direction and the sheet conveyance direction for printing on the corrugated sheet. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated board box making machine for performing desired printing on a single-piece corrugated board.

[0002]

2. Description of the Related Art A cardboard sheet box making machine 98, as shown in FIG. 16, mainly feeds a cardboard sheet S, and a desired printing on the cardboard sheet S fed from the paper feeding unit 59. The first printing unit 64 and the second
The printing unit 72, a creaser unit 80 that performs ruled lines, a slotter unit 85 that performs groove cutting, a die cutting unit 92 that performs punching, and the like. In the corrugated board box making machine 98, the combination of each of these units differs depending on the purpose of production, etc., and when three-color printing is performed, there are three printing units, and when there is no purpose of punching, a die-cut unit is combined. There are none. Also, depending on the order to be produced, only printing or only grooving,
There is also a usage mode in which only punching is performed.

In the paper feeding unit 59, a paper feeding table 60
The corrugated board sheets S are stacked on each other, and a paper feeding device 62 for feeding the stacked corrugated board sheets S of the lowermost layer one by one toward the downstream process is provided. The corrugated cardboard sheet S fed by the paper feeding device 62 is fed by the feed roll 6
It is sandwiched between 3a and 63b and sent to the downstream process. 6 in the figure
1 is a corrugated cardboard sheet S placed on the paper feed table 60
It is a back guide that regulates the rear end portion.

The first and second printing units 64 and 72 respectively have printing cylinders 65 and 73 on which desired printing plates 66 and 74 are wound, and an ink transfer roll 67 that transfers ink to the printing plates 66 and 74. , 75 and squeezing rolls 68, 76 which contact the ink transfer rolls 67, 75 and rotate in opposite directions to squeeze the ink to form an appropriate ink film on the surfaces of the ink transfer rolls 67, 75. To be done.
Then, the ink transfer rolls 67 and 75 and the squeeze roll 6
Ink pool parts Z1 and Z2 are formed between
Ink is supplied by an ink supply device (not shown),
The ink is transferred to the ink transfer rolls 67, 75 as described above.
And the squeezing rolls 68 and 76 squeeze to form a proper film on the outer peripheral surfaces of the ink transfer rolls 67 and 75 and transfer them to the printing plate. Further, press rolls 69 and 77 are arranged at positions facing the above-mentioned printing cylinders 65 and 73 with the corrugated board sheet conveying line PL interposed therebetween, and the fed corrugated sheet S is wound around the printing cylinders 65 and 73, respectively. The printing plates 66, 74 and the press rolls 69, 77 are held between them to perform desired printing. Further, sheet conveying devices 70 and 78 are arranged in the printing units 64 and 72. Although there are various types of sheet conveying devices, for example, the sheet conveying devices 70 and 78 shown in FIG. 16 have disclosed a device that sucks and conveys the corrugated board sheet S to the sheet feeding members 71 and 79 by the action of suction.

Subsequently, in the creaser unit 80, the upper ruled line roll 81 is sandwiched across the corrugated paperboard sheet conveying line PL.
And the lower ruled line roll 82 are arranged so as to face each other, and a ruled line is applied to a desired position of the corrugated paperboard sheet S to be fed. Also, in the creaser unit 80, the printing units 64, 72
A sheet transporting device 83 similar to the sheet transporting devices 70 and 78 in FIG. 7 is provided, and the corrugated cardboard sheet S is sucked and transported by the sheet feeding member 84 by the action of suction.

In the slotter unit 85, one slotter shaft is provided with two slotter knives, which is referred to as a single slotter in the art, and one slotter shaft is provided with one slotter knife, and two sets of the slotters are provided. There are two types of slotters referred to in the art as double slotters. The slotter disclosed in FIG. 16 discloses an example of the former single slotter, and the first slotter knife 8 is sandwiched across the corrugated cardboard sheet conveying line PL.
7 and upper slotter 86 with second slotter knife 88
And a lower slotter 89 at a position facing each upper slotter 86 with the corrugated cardboard sheet conveying line PL interposed therebetween.
And the first slotter knife 87 and the second slotter knife 88 of the upper slotter 86 and the lower slotter 8 respectively.
With 9, the groove cutting process is performed at a desired position of the fed corrugated board sheet S. In the slotter unit 85 as well, a sheet conveying device 90 similar to the printing units 64 and 72 is disposed, and the corrugated cardboard sheet S is sucked by the sheet feeding member 91 by the action of suction to convey the sheet.

The die-cutting unit 92 is provided with a die cylinder 93 and an anvil cylinder 95 to which a punching die 94 is attached so as to sandwich the corrugated cardboard sheet conveying line PL, and punches the corrugated sheet S to be fed at a desired position. Give.

[0008] And, these cardboard sheet box making machines 98
Each unit is driven by a main drive unit 97 transmitting a driving force by a drive transmission unit (not shown) such as a gear or a line shaft. Then, the main drive device 97
Are driven based on commands from main controller 96.

In the corrugated board sheet box making machine 98 configured as described above, the corrugated board sheet S fed from the sheet feeding unit 59 is transferred to each of the sheet conveying devices 70, 78, 83, 90.
While being conveyed by the first and second printing units 64,
The desired printing is performed at 72, the creasing unit 80 performs ruled line processing, the slotter unit 85 performs grooving processing, and the die cutting unit 92 performs punching processing.

Generally, in the corrugated board sheet box making machine 98, each unit 59, 64,
72, 80, 85 and 92 are operated at a desired speed. Then, the printing cylinders 65 and 73 of the printing units 64 and 72 and the upper slotter 8 of the slotter unit 85.
6 and the die cylinder 93 of the die cut unit 92 each make one rotation, the respective units 64 and 7
The corrugated board sheet S fed by 2, 85, 92 is subjected to respective processing. The paper feeding unit 59 mechanically or electrically feeds the corrugated cardboard sheets S one by one at a predetermined cycle in accordance with the operating speed of each of the units 64, 72, 85, 92, each one revolution. That is, the corrugated board sheet box making machine 98 described above is operated at a desired speed by the corrugated board sheet box making machine 98, and each of the printing cylinders 65, 73, the upper slotter 86 and the die cylinder 93 makes one revolution. A corrugated paperboard sheet is produced by adopting a paper feeding operation method in which one sheet of S is fed.

[0011]

The printing units 64 and 72 in the corrugated board sheet box making machine 98 have the following features.
The unit is a unit dedicated to one color, and is 2 in the mechanical specifications of the corrugated paperboard box making machine 98 as shown in FIG. 16, for example.
It will be color printed. The number of printing colors in the corrugated board sheet box making machine 98 is usually decided by the machine user at the time of introducing the machine according to the production form. Further, after the introduction of the machine, generally, capital investment for increasing the number of printing colors is not made due to the location of the machine and the investment cost, but it is unavoidable to increase the number of printing colors as necessary. Therefore, in the corrugated board box making machine 98, when the machine user installs the corrugated board box making machine, it is unavoidable that the corrugated board box making machine is introduced in consideration of its production form, installation location, and the like.
For example, a user who desires full-color printing has to install a printing unit for four colors. In such introduction, the installation space is required for the number of printing units, and the introduction cost is increased by the number of printing units.

Further, the corrugated cardboard sheet printing machine 98.
In the printing units 64 and 72 in the above, the mechanical form of the printing apparatus is as described above, and it is necessary to wind desired printing plates 66 and 74 around the printing cylinders 65 and 73 of each printing unit. That is, the printing units 64 and 72 always require the printing plates 66 and 74.
Is required for each production order, and the printing plate 6
There are many troublesome matters after the introduction of the printing plate, such as the investment associated with the production cost, the management of the printing plate, and the storage location. In addition, the machine operator has to replace the printing plate for each order in each production, and the labor required for the replacement work is required, and the machine stop time required for the replacement also leads to a reduction in production efficiency. .

Further, the printing units 64 and 72 have the ink transfer rolls 67 and 75 and the squeezing rolls 68 and 7 described above.
Ink is supplied to the ink reservoirs Z1 and Z2 of No. 6 from an ink supply device composed of an ink tank through an ink pump (not shown) from an ink supply path piped inside the printing unit, and both rolls 67, 75, 68, 76 are supplied. After squeezing the ink with, the appropriate ink film is formed on the surfaces of the ink transfer rolls 67, 75 and transferred to the printing plate, and the corrugated cardboard sheet S fed is printed as desired. The excess ink overflowing from 75, 68, 76 uses a large amount of ink because of the mechanical structure that returns to the ink tank through the ink return path. Therefore, a large amount of ink is discarded when the ink in each of the ink paths and the rolls 67, 75, 68, and 76 is collected or washed when the order is changed after the production quantity. In addition, a large amount of water must be used for cleaning the ink, and the production costs associated with these are enormous. As described above, since a large amount of ink is circulated in the printing unit and a large amount of water is used for cleaning, the vicinity of the ink supply device (not shown) of the printing units 64 and 72 is changed over time. In addition to being unclean and spoiling the aesthetics, the ink cleaning wastewater discharged to the outside of the machine must be treated as industrial wastewater, which may be a kind of environmental problem along with its equipment and cost.

Further, since the corrugated board box making machine has the above-mentioned machine configuration and its usage form, in order to reduce the factory and the production cost of the machine operation efficiency, so-called small lot production is generally performed. It is unsuitable, and it has been said that profits in actual production cannot be obtained unless at least several tens of pieces are produced per order. However, in response to the recent demand for small lot production, the corrugated cardboard sheet producer side uses the corrugated cardboard sheet box making machine 98 regardless of the conditions of machine operation efficiency and production cost in order to secure the production and orders. , Had to carry out the small lot production as described above. In such a situation, a machine maker who manufactures the corrugated board sheet box making machine 98 has an urgent need to solve the above-mentioned problems that the corrugated board sheet manufacturer has. The present invention provides a printing device in a corrugated board sheet box making machine that solves the various problems described above.

[0015]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and preferably achieve an intended purpose, the present invention is a cardboard sheet printing apparatus for performing desired printing on a corrugated board sheet, which is separated from the corrugated board sheet. An ink projecting portion that ejects a desired liquid ink onto a corrugated board sheet from a position, an ink supply portion that supplies ink to the ink projecting portion, and an ink containing liquid ink that is supplied to the ink projecting portion through the ink supply portion. From a storage unit and a control device that inputs a print image to be printed on a corrugated cardboard sheet in advance and that controls the ejection of ink from the ink protrusions to print the print image on a corrugated cardboard sheet that is conveyed. Becomes
A corrugated board sheet printing apparatus that two-dimensionally develops a printed image in the machine width direction and the sheet conveyance direction by the control device and ejects ink from the ink head onto the corrugated board sheet to print on the corrugated board sheet.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a printing apparatus for a corrugated board sheet box making machine according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. FIG. 1 is a side view of a corrugated board box making machine suitably showing a printing apparatus for a corrugated board sheet making machine according to the present invention. The corrugated board box making machine 1 is a sheet-fed corrugated board produced by a corrugating machine (not shown). Since the sheet S is processed, some cardboard sheet feeding device is required. In the present invention, since the sheet feeding device is not an essential requirement, the sheet feeding unit 2 having the same configuration as the sheet feeding unit described with reference to FIG. 16 which is a conventional sheet feeding device is disclosed. Since the sheet feeding unit 2 is not much different from the conventional sheet feeding unit, only its structure will be briefly disclosed here. The sheet feeding unit 2 includes a sheet feeding table 4, and a sheet feeding device 6 and a feed roll 7 that feed the sheet-shaped corrugated sheet S placed on the sheet feeding table 4 toward a downstream process.
It consists of a and 7b and the back guide 5, and its operation is the same as the conventional one.

Subsequently, the printing unit 8 including the printing device 24 of the present invention is disposed in the downstream process of the paper feeding unit 2.
The printing device 24 installed in the printing unit 8 uses an ink head 30 of a so-called ink jet system, which uses a pigmented liquid ink and ejects the ink from a projected portion of the ink at a preset pressure amount. This is due to the printing method in which a large number are arranged in the width direction. That is, each ink head 30 has a large number of ink nozzles (not shown) disposed in each ink head 30, and one ink head 30 is filled with a pigmented liquid ink as shown in FIG. An ink head for full-color printing that ejects yellow Y, cyan C, magenta M, and black K inks from an ink cartridge 25 through an ink pump 26 that is an ink supply unit to perform full-color printing. Although various types of pumps are used as the ink pump 26, the form of the pump is not limited here as long as it is a pump capable of applying sufficient pressure to eject the ink from the ink head 30. The ink head 30 is shown in FIGS.
And as shown in FIG. 4, the frame 9 of the printing unit 8,
At least two or more ink heads 30 are arranged in the machine width direction on the stay 31 mounted between the nine. FIG. 4 is a view on arrow XX in FIG. Ink head 3
Although there are various sizes of 0, the size of the maximum printable ink head per ink head is from several tens of millimeters square meters to 100 due to recent development.
Millions of square meters have appeared, and a plurality of them are attached to the stay 31 in the machine width direction. here,
To attach the ink head 30 to the stay 31,
Generally, as shown in FIG.
A configuration in which 0s are arranged without any gap is conceivable. In the present invention, the arrangement structure of the ink head 30 disclosed in FIG. 2 can sufficiently achieve the purpose, but in order to obtain the further effect of the present invention, the stay 3 as shown in FIGS.
It is also conceivable to arrange the ink heads 30 adjacent to each other so as to partially overlap each other in the machine width direction and to be arranged in a zigzag pattern in the sheet flow direction. That is, printing by the individual ink heads 30 is performed by the control device 23 described later.
In order to make the print area between the adjacent ink heads 30 and 30 clearer, the print area of the sheet S facing the ink head 30 is printed in response to the command from FIG. An overlapping staggered arrangement of ink heads 30 as disclosed in FIG. 4 is considered to be a more preferred arrangement.

Next, the ink head 30 of the printing device 24.
Is due to the characteristics of the ink head.
The distance between the ink nozzle (not shown) provided inside and the sheet S must be a designed distance. That is, with respect to the corrugated board sheet S, the clearance between the corrugated board sheet S and the ink nozzles is set and finely adjusted so as to have the optimum clearance value t. That is, the corrugated board sheet S generally has a thickness of about 8 depending on the order of production.
Adjust the gap t from a double-sided corrugated board sheet of about mm to a double-sided corrugated board sheet of about 5 mm or 3 mm, which is usually called A flute, and an ultrathin corrugated board sheet called micro flute in recent years. There must be. Therefore, the ink head 30 can be moved up and down with respect to the paper line PL on which the sheet S travels via the stay 31 to which the ink head 30 is attached.

As shown in FIG. 3, the ink head raising / lowering device comprises raising / lowering brackets 32, 3 screwed to screw shafts 34, 34 at both ends of a stay 31 to which the ink head 30 is attached.
2 is provided, and the elevating brackets 32, 32 slide on slide rails 33, 33 attached to the frames 9, 9. Then, the screw shafts 34, 3
A drive device 36, 36 such as a servo system electric motor for rotating the screw shafts 34, 34 is provided at one end of the bracket 37,
It is attached to the frames 9 and 9 via 37, bearings 35 and 35 are provided at the other ends of the screw shafts 34 and 34, and the screw shafts 34 and 34 are rotatably supported. That is, the drive devices 36, 36 are activated to activate the screw shaft 3
By rotating the screw shafts 34 and 34, the elevating brackets 32 and 32 that are screwed into the screw shafts 34 and 34 are moved to the slide rail 3
The lifting brackets 32, 32 are lifted up and down depending on the rotation direction of the screw shafts 34, 34.
The ink head 30 moves up and down with respect to the paper line PL via the stay 31 attached to the paper line PL. Further, since it is necessary to raise and lower the ink head 30 in accordance with the thickness of the corrugated paperboard sheet S to be produced and to uniformly move the ink heads 30 and 30 in the machine width direction up and down and adjust the clearance, a control device 28 described later will be described. The vertical movement amount and the fine adjustment are performed in accordance with the command, and the vertical movement amount and the gap adjustment are measured by the rotation measuring devices 38, 38 such as pulse generators attached to the driving devices 36, 36, and the control device 28 is notified of the information. Will be fed back. Since the positioning of the ink head 30 with respect to the corrugated paperboard sheet S is accurate, the positioning means will be described in detail. Specifically, the ink head 30 receives the step type information of the corrugated board sheet corresponding to the production order transmitted from the production management device 23 by the control device 28, and responds to the thickness of the corrugated board sheet S that is the production order. Positioning is performed at the position to be used by using the above-described lifting device. A sheet guide 47, which will be described later, is similarly positioned. The ink head, the sheet guide 47, and the sheet guide 47 are mechanically configured separately, but are controllably invariable with respect to the positioning. That is, as will be described in detail later, the sheet guide 47 has a role of a positioning assisting mechanism for the ink head 30 with respect to the actual corrugated board sheet S, and the thickness of the sheet guide 47 may be in contact with or not in contact with the actual corrugated board sheet S. From the position at which the sheet guide 47 and the ink head 3 are detected using the detected position as basic data.
Performs control while maintaining a controllable invariant positional relationship with 0,
The actual gap value t between the ink head 30 and the sheet guide 47 is controlled. By doing so, the sheet guide 47 measures the actual position of the sheet S, and the ink head 30 can know the actual thickness of the sheet S based on the measured value. Ink head 3
The actual gap value t between 0 and the sheet S is always the optimum gap value t for printing. Furthermore, the fine adjustment corresponding to the actual corrugated board sheet S can be performed by the measurement value from the measuring device 100 described later, and the best printing can be performed. The lifting device is not limited to the above-mentioned screw shaft or the like, and for example, an actuator such as air or hydraulic pressure using a fluid medium or the like is attached to the stay 31 or the like to which the ink head 30 is attached, and is lifted by the operation of the actuator. Such means may be used. Further, if a ball screw or a linear motion bearing used as a sliding system member is used for the screw shaft and the slide rail, the sliding effect is further improved and the mechanical performance is improved.

Next, in the printing apparatus 24 of the present invention, as described above, the gap value between the ink head 30 and the corrugated paperboard sheet S must be accurate so as to be the designed gap value t. However, since the corrugated board sheet box making machine 1 as shown in FIG. 1 conveys the corrugated board sheet S as a single sheet, the sheet S is not necessarily compensated for a certain amount of traveling along with the conveyance. That is, the vehicle runs while vibrating subtly due to the influence of collision with the feeding member of the sheet conveying device, vibration of the corrugated paperboard box making machine itself, and the like. The subtle vibration of the corrugated paperboard sheet S may cause a printing failure without obtaining an accurate designed gap value t in the ink head 30 of the printing device 24. Then, as one of the effective means for solving the problem, there is the sheet conveying apparatus 10 by the suction method disclosed in FIGS. 1 and 3. The suction type sheet conveying device 10 surely conveys a sheet,
In addition, the track record is recognized for achieving stable sheet conveyance without causing a sheet delay. The suction type sheet conveying apparatus 10 has a large number of sheet feeding rollers 12 arranged below a paper line PL which is a sheet conveying section facing the printing apparatus 24, and only the uppermost portion of the feeding rollers 12 is used for sheet feeding. It is slightly projected so as to come into contact with, and most of it is surrounded by the suction box 11. A slight gap is provided between the protrusion of the feed roller 12 and the suction box,
The sheet S is sucked through this gap and the sheet S is adsorbed by the feed roller 12, and the sheet conveying effect described later is obtained.
The suction box 11 is mounted between the frames 9, 9 of the printing unit 8 via brackets 29, 29. The suction box 11 has a blower 13 and a duct 14 for discharging exhaust gas from the blower 13.
Is attached, and the blower 13 is actuated to create a negative pressure in the suction box 11 to suck the sheet conveyed from the gap between the suction box 11 and the feed roller 12 described above. By doing so, the conveyed sheet S is brought into close contact with the feed roller 12, the sheet S does not generate the slight vibration caused by the sheet conveyance, and the sheet S always travels on a constant conveyance line. Therefore, just below the ink head 30 of the printing device 24, the optimum gap value t between the ink head 30 and the sheet S is designed. The sheet conveying device is not limited to the one having the above configuration. A conventionally used sheet conveying device may be used as long as it can surely convey the sheet S without vibrating.

It is also conceivable to install the sheet guide device 46 in order to make the above-described gap value between the ink head 30 and the sheet S the optimum gap value t in design. Specifically, in order to make the gap between the ink head 30 and the sheet S immediately below the ink head 30 to be the optimum gap t, at least one of the upstream side and the downstream side of the ink head 30 or both sheet guides are provided. A device 46 is provided.
The sheet guide device 46 securely holds the conveyed sheet S, and the optimum gap value t is provided just below the ink head 30.
1 and FIGS. 5 to 6 can be used as the sheet guide 47. For example, the sheet guide 47 disclosed in FIGS. L-shaped sheet guide 4 in contact
Seven cases have been disclosed. At least two sheet guides 47 are arranged in the machine width direction to securely hold the conveyed sheet S on the suction box 11 side. Further, a configuration may be adopted in which full-width integrated type sheet guides that guide the sheet guide 47 over the entire width are arranged on the upstream side and the downstream side of the ink head 30. However, since printing stains may occur on the downstream side of the ink head 30, the full width integral type sheet guide is provided only on the upstream side of the ink head 30, and the downstream side of the ink head 30 is the above-described one disclosed in FIG. The form may be changed as a split type sheet guide. The corrugated cardboard sheet contact surface of the sheet guide 47 has been subjected to a surface treatment such as plating for improving the sheet S transportability, the sheet guide itself is made of a resin material having a surface gliding property, and has abrasion resistance. A ceramic material having excellent friction resistance and heat resistance may be used. Further, as shown in FIGS. 5 and 6, it is necessary for the sheet guide 47 to change or finely adjust the gap value according to the thickness of the sheet S to be produced and the production situation. Specifically, the sheet guide 47 is slidably provided on, for example, the sheet guide bracket 53, and is moved up and down by an elevating member 54 attached to one or both of the sheet guide brackets 53. A rack or the like is provided on the elevating member 54, and a gear 55 that meshes with the rack is provided. The gear 55 is rotated by a drive device 56 such as an electric motor attached to the frame 9 or the like via a bracket 57. Raise and lower by. That is, the gear 55 is rotated by the operation of the drive device 56, and the rotation of the gear 55 causes the lifting member 5 having a meshing rack and the like with the gear 55.
4 is moved up and down, and the sheet guide 47 is moved up and down with respect to the elevating member 54 via the sheet guide bracket 53. In order to stabilize the sheet S at the time of printing, the sheet guide 47 is not simply placed on the sheet S, but may guide the sheet with a slight pressure so as not to substantially crush the sheet S. preferable. In addition,
The lifting device is not limited to the above-mentioned mechanism, and for example, an actuator such as air or hydraulic pressure using a fluid medium is attached to the seat guide bracket 53 or the like attached to the seat guide 47, and lifted by the operation of the actuator. Means may be used. The sheet guide 47 has a role of setting the gap value t between the ink head 30 and the corrugated cardboard sheet S, as described above. Specifically, the ink head 30, the sheet guide 47, and the sheet guide 47 are mechanically configured separately, but are controllably invariable with respect to the positioning. That is, the sheet guide 47 has a role of a positioning assist mechanism for the ink head 30 with respect to the actual corrugated board sheet S, and the sheet guide 47 serves as the actual corrugated board sheet S.
When it comes into contact with, or at a position where it is slightly pressed to stabilize the sheet as necessary, the position is transmitted to the control device 28 by the pulse generator 56a as a measurement value.
Then, the actual thickness of the sheet S is calculated from the measured value based on the position, the gap value t between the sheet S and the ink head 30 is calculated based on the value, and the ink head 30 is optimized for the corrugated board sheet S. The gap value t is set. By doing so, the sheet guide 47 always measures the actual position of the sheet S, and the ink head 30 can know the actual thickness of the sheet S based on the measured value. The actual gap value t between the ink head 30 and the sheet S is always the optimum gap value t for printing.

Further, the corrugated board sheet S is not absolutely flat due to its structure and properties. Therefore, the ink head 30
In order for the ink ejected from the printer to be printed accurately on the sheet S, the gap value t between the ink head 30 and the sheet S is preferably a preset gap value. Therefore, in FIG.
As shown in FIG. 3, the measuring device 100 for measuring the unevenness of the surface of the corrugated board sheet S is provided, and the ink head 30 is moved up and down based on the measurement result obtained from the measuring device 100 to perform fine adjustment. Specifically, as shown in FIG. 13, the measuring device 100 attaches a measuring tool 101 for measuring unevenness on the surface of the corrugated board sheet S to the tip of a bracket 102 extending from the sheet guide 47, for example. And the measuring tool 1
The measuring instrument 102 is provided between 01 and the bracket 102. In the embodiment shown in FIG. 13, a measuring instrument 101 is provided with, for example, a roller, which is brought into contact with the corrugated cardboard sheet S, and the roller 103 moves up and down according to the unevenness of the sheet S to detect its displacement 103
Is provided. As described above, if the above-described measuring device 100 mechanically has a pair of relations with the sheet guide 47, the measuring device 100 will have the sheet guide 47.
Only the displacement amount with respect to
Moreover, since the ink head 30 is positioned by the sheet position measured by the sheet guide 47, fine adjustment may be performed by an amount corresponding to the displacement amount of the measuring device 100. As a specific control, the measuring device 103 measures the displacement amount of the measuring tool 101 displaced according to the unevenness of the sheet S, sends the displacement amount to the control device 28, and the control device 28 performs the calculation. At this time, the distance between the measuring tool 101 and the ink head 30 is determined by design, and the transport speed of the sheet S to be transported is known in advance. Therefore, the control device 28 uses these various information as a basis. To the measuring tool 1
The time at which the position measured by 01 reaches the ink head 30 is determined, and the ink head elevating device shown in FIG. 3 is operated to move the ink head 30 up and down in accordance with the timing at which the position is reached. Raise and lower. By doing so, the distance t between the ink head 30 and the corrugated board sheet S can always be set to a constant value even if there are subtle irregularities on the surface of the corrugated board sheet S, and good printing becomes possible. In addition, the surface detection of the sheet S according to the above-described measuring apparatus 100 has been described with reference to the example of the contact-type measuring tool 101 using a roller or the like, but the invention is not limited to this. Alternatively, a non-contact type detector using a CCD camera or the like may be used.

Further, it is necessary to move the sheet guide 47 in the machine width direction according to the paper width of the sheet to be produced and the printing position in the sheet width direction. Specifically, the seat guide 47 is slidably provided on the seat guide bracket 53 as described above, and the sliding bracket 4 is screwed to the seat guide 47 with the screw shaft 49.
8 are provided. A drive device 51 such as an electric motor for rotating the screw shaft 49 via a coupling 50 or the like is attached to one end of the screw shaft 49 on the frames 9, 9 via a bracket 52. That is, when the drive device 51 is activated and the screw shaft 49 rotates, the sliding bracket 48 that is screwed with the screw shaft 49 moves on the screw shaft 49 and moves on the sheet guide bracket 53.
It slides to the left and right according to the rotation direction of 9, and the sheet guide 47 attached to the sliding bracket 48 moves in the machine width direction. Note that the sliding device is not limited to the above-described screw shaft or the like, and for example, an actuator such as air or hydraulic pressure using a fluid medium or the like is directly attached to the seat guide 47 and slid by the operation of the actuator. Means may be used. Further, if a ball screw or a linear motion bearing used as a sliding system member is used for the screw shaft and the slide rail, the sliding effect is further improved and the mechanical performance is improved.

Next, a control device of the corrugated board sheet box making machine 1 according to the present invention will be described. In general, in the corrugated board sheet box making machine 1, various commands associated with production orders are transmitted by the production management device 23. The control centering on the printing device 24 in the present invention is controlled by the control device 28 provided in the production management device 23, for example.
Specifically, when performing printing on the sheet S by the plurality of ink heads 30 attached in the machine width direction of the printing device 24 having the above-described configuration, the printing image and the printing position for the sheet S according to the production order, A print color selection or the like is input through the input unit 27, and the input information is transmitted to the control device 24. Then, in the control device 24, the ink ejection timing, time, print color, etc. by the ink heads 30 arranged in the machine width direction are set for each ink head 30 with respect to the conveyance speed and the feeding timing of the corrugated cardboard sheet S to be fed. Expand every time. Of course, not only the machine width direction but also the two-dimensional development of the print image in the sheet conveyance direction is performed. Further, fine adjustment is performed between adjacent ink heads 30 so that clear and accurate printing can be performed in a print area where the ink heads 30 interfere with each other. Then, based on the control command developed for each ink head described above, each print color supply control of the ink tank 25 and the ink from the ink tank 25 to the ink head 30 are controlled.
The operation control of the pump to be supplied to is performed. Further, the control device 24 also performs the above-described elevation of the ink head 30, control of the gap value, elevation of the sheet guide 47, positioning control in the machine width direction, and the like.

Further, the control device 28 issues a drive command for the corrugated board sheet box making machine 1 associated with the production to the drive device 21, and controls the paper feeding unit 2, the printing unit 8, the sheet conveying device 15, the sheet stacker 18, and the like. At the same time, for example, the drive device 21 is equipped with a rotation measuring device 22 such as a pulse generator, and the rotation measuring device 22 feeds back the drive status of the drive device 21 in the current production.

Further, in the printing apparatus in the corrugated board sheet box making machine according to the present invention, the printing detection apparatus 58 is provided on the downstream side of the printing apparatus 24 of the present invention for more effective operation.
And a printed matter P printed by the printing device 24 of the present invention.
Is directly confirmed and the information is transmitted to the control device 28 to be used and expanded in the subsequent print control. Specifically, at least one print detection device 58 is provided downstream of the printing device 24. More preferably, a plurality of prints can be arranged in the machine width direction for more accurate and specific print detection. The printing detection device 58 may be any detection device as long as it can detect the printed matter P printed by the printing device 24. For example, if the printed matter is captured as an image, the entire printed matter or a part of the printed matter is obtained by using a CCD camera. Is captured as an image, and the captured printed matter is controlled by the control device 2
It is confirmed whether the printed matter printed by the printing device 24 is printed according to the regular printing by comparing with the printed matter data in the production order stored in advance in FIG. Then, if the printing is normal, the subsequent printing is continuously performed, and if there is a defect in the printing, the control device 24 causes the subsequent printing to be regular printing so that the ink heads 30 and the like for the above-described printing are processed. Take control. Further, the print detection device 58 is not limited to the above-mentioned means using the CCD camera,
For example, various detectors such as a reflective type for confirming only the print start position or a preset printed matter, and the printing device 24.
It may be a microscopic detector that detects the dot size or density per unit of the ink printed by, and in any case, the subsequent printing is performed on the printed matter printed by the printing device 24 as described above. Is to control the printing to be regular.

The card stack sheet S printed by the printing device 24 is received on the downstream side of the printing unit 8 including the printing device 24 of the present invention, and the sheet stacker 1 in the downstream process.
A sheet conveying device 15 that conveys the sheet to the sheet feeding device 8 and a sheet stacker 18 that processes the sheet conveyed from the sheet conveying device 15. The sheet stacker 18 includes belt-shaped members such as belts wound around rollers 17a and 17b on the upstream side and the downstream side of the sheet conveying device 15, and the sheet stacker 18 receives a sheet supplied from the sheet conveying device 15 by a sheet placing table 19 And a lifter 20 for raising and lowering the sheet mounting table 19 according to the supply of the sheet. The sheet conveying speed of the sheet conveying device 15 and the raising / lowering control of the sheet placing table 19 in the sheet stacker 20 are controlled by the production management device 23 and the production management device 2 described above.
3 is operated by receiving a command from the control device 28 and the like included in 3.

The operation of the corrugated board sheet box making machine 1 of the present invention as described above will be described. Various production information in the production is input to the production management device 23, and a print image or print in the production order is produced. color,
Various information associated with various printing such as the printing position is arbitrarily input from the input unit 27 and transmitted to the control device 28. The control device 28 changes the order associated with the production based on the print information associated with the production from the input unit 27 and the production information associated with the production that is input in the production management device 23 in advance. That is, in the printing unit 8, the ink jet timing, the time, and the ink head used in the machine width direction at the feeding speed of the corrugated cardboard sheet S fed to the ink head 30 of the printing device 24 are developed, and the ink head 30 becomes the production order. Is set to the optimum gap value for the thickness of the corrugated board sheet. Then, here, the ink head 30 is positioned at a position with respect to the thickness of the corrugated board sheet S on the production order in response to a command from the production management device.
The sheet guide 47 of the ink head 30 is the ink head 3
Since the sheet guide 47 has a role of a positioning assisting mechanism for the actual corrugated board sheet S, when the sheet guide 47 comes into contact with the actual corrugated board sheet S, or if necessary, a slight pressure is applied to stabilize the sheet. At that position, the pulse generator 56a transmits the position as a measurement value to the control device 28. Then, the actual thickness of the sheet S is calculated from the measured value based on the position, and the gap value t between the sheet S and the ink head 30 is calculated based on the value,
The ink head 30 is set to the optimum gap value t for the corrugated board sheet S. The ink head 30 thus positioned is set to the optimum actual gap value t with respect to the sheet S, and further, fine adjustment is performed based on the measurement value by the measuring device 100. Further, the sheet guide is set to the optimum gap value for the thickness of the corrugated board sheet according to the production order and a desired position in the machine width direction. When the production of the corrugated board sheet S is started after the preparation for production is completed, the corrugated board sheet S is fed by the sheet feeding device 6 of the sheet feeding unit 2, and the state of the fed sheet S is determined by the driving device 21. Is transmitted to the control device 28 by the rotation measuring instrument 22 of. Then, in the control device 28, the rotation measuring device 22
When the sheet arrives just below the ink head 30 of the printing device in the printing unit 8 also referring to the measurement data of 1., the ink tank 25 and the ink pump are instructed to select the ink to be used and perform the ink supply operation. The sheet is stably conveyed by the suction box type sheet conveying device 10, and the sheet guide 4 is used.
The sheet is surely supported by the sheet guide 47 immediately below the ink head 30 by the ink jet printer 7, and the ink head 30 ejects the ink from the ink head 30 based on the print information previously developed in accordance with the arrival of the sheet S. To do.

FIG. 8 is a plan view of the conveyed sheet S according to the present invention. In this embodiment, printing P is performed on a corrugated cardboard sheet supplied with a gap of L1 between the sheets. is there. In this case, the production management device 23 knows the sheet length L to be produced and each sheet interval L1 in advance, and the control device 28 controls the printing device 24 on the basis of these pieces of advance information so that the sheet is the printing device 24. When it reaches the position just below, the printing position in the sheet width direction for each sheet S, the printing position in the sheet flow direction, the ink ejection timing and time, the ink color, etc. are developed by the ink head 30 arranged in the machine width direction. Then run. In FIG. 7, the sheets Sn and Sn + 1 have already been printed by the printing device 24, and the sheets Sn + 3 and Sn +
4 is in a state of being printed by the printing device 24. The sheet Sn + 2 is currently being printed by the printing device 24 in accordance with the progress of the sheet Sn + 2. That is, about half of the sheet Sn + 2 has passed the printing device 24 in the sheet conveying direction, and therefore, the upstream side of the sheet Sn + 2 has completed printing and the downstream side is about to print.

Next, the embodiment shown in FIG. 8 is a two-dimensional development of an embodiment in which printing P is performed on a corrugated cardboard sheet that is fed in a state where there is no gap L0 between the conveyed sheets S. is there. In this case, the production management device 23 has grasped in advance the state in which there is no sheet length L to be produced or each sheet interval L0, and the control device 28 controls the printing device 24 based on these advance information to print the sheet. An ink head in which a printing position in the sheet width direction for each sheet S, a printing position in the sheet flow direction, ink ejection timing and time, ink color, and the like are arranged in the machine width direction when reaching the position right below the device 24. Develop by 30 and execute. In FIG. 8, the sheet Sn and the sheet Sn + 1 have already been printed by the printing device 24, and the sheet Sn + 3 and the sheet Sn have been printed.
+4 is in the state of being printed by the printing device 24. The sheet Sn + 2 is currently being printed by the printing device 24 in accordance with the progress of the sheet Sn + 2. That is, about half of the sheet Sn + 2 in the sheet conveying direction has passed through the printing device 24, so that the upstream side of the sheet Sn + 2 has completed printing and the downstream side is about to print.

As described above, according to the present invention, it is possible to print on the corrugated paperboard sheet S by controlling the printing device 24 using the ink head 30 thus arranged in the machine width direction.

Next, another embodiment using the printing apparatus of the present invention will be described. The embodiment disclosed in FIG. 9 is the same as the printing apparatus 24 using the ink head 30 arranged in the machine width direction described above. Then, an embodiment is disclosed in which the printing device 24 is slid by a desired amount in the sheet conveying direction. That is, the printing device 24 is slid in the direction opposite to the direction in which the sheet S is supplied, and printing is performed during the sliding. As a result, the relative speed of the sheet S with respect to the printing device 24 becomes faster than the normal speed with respect to the transportation speed of the sheet S, and the printing device 24 described above is fixed and printing is performed in accordance with the transportation of the sheet S. On the other hand, it has an advantage that its production efficiency is improved. A specific configuration according to the embodiment is as disclosed in FIG.
Flexible joints 40, 40 are provided between the stay 31 to which the ink head 30 is attached and the elevating device that elevates and lowers the printing device 24, and slides the elevating device that elevates and lowers the printing device 24 and the printing device 24 described below. Absorbs the two-dimensional movement with the sliding device that moves. Further, sliding brackets 39, 39 that are screwed with the screw shafts 41, 41 are provided at both ends, and the sliding brackets 39, 39 are attached to the stay 31. Then, the screw shafts 41, 41
Drive devices 42, 42 such as servo-system electric motors for rotating the screw shafts 41, 41 are provided at one end of the brackets 44, 4
The screw shafts 41, 41 are rotatably supported on the other ends of the screw shafts 41, 41 by bearings 45, 45. That is, the drive devices 42, 42 are activated to drive the screw shafts 41, 4
When 1 is rotated, the sliding brackets 39, 39 that are screwed into the screw shafts 41, 41 slide according to the rotation direction of the screw shafts 41, 41.
Ink head 3 via stay 31 attached to 9, 39
0 will slide relative to the sheet being fed. Further, since it is necessary to adjust the amount of sliding of the ink head 30 with respect to the sheet S to be supplied and the control of the ink ejection by the ink head 30 according to the print image, it is attached to the drive devices 42, 42. The information is measured by the rotation measuring devices 43, 43 such as the pulse generator, and the information is fed back to the control device 28. Also, by using so-called ball screws for the screw shafts 41, 41, the sliding operation of the printing device 24 can be performed swiftly. Note that the sliding device is not limited to the above-described screw shaft or the like, and for example, an actuator such as air or hydraulic pressure using a fluid medium or the like is directly attached to the seat guide 47 and slid by the operation of the actuator. Means may be used. Further, even if a linear bearing used as a sliding system member is used instead of the above-mentioned screw shaft, the sliding effect is further improved and the mechanical performance is improved. Specifically, for example, when it is necessary to print on one sheet S by a plurality of sliding operations, compared with the case of a so-called printing state in which the sheet S moves in the direction opposite to the sheet conveying direction. , The printing device 24 can be moved by quickly sliding in the so-called non-printing state of moving in the sheet conveying direction.
After printing the desired amount on the sheet S by one slide, the printing device 24 can return to the previous position before the sheet S passes the print start point of the next area.

In the corrugated paperboard box making machine 1 according to the other embodiment, the control device 24 controls the ink head 30.
The lifting and lowering of the printer, the adjustment of the gap, the adjustment of the sheet guide, and the like are performed in the same manner as the above-described control, and the control centering on the printing device 24 prints on the sheet S by a plurality of ink heads 30 attached in the machine width direction of the printing device 24. In order to carry out the above, an ink head arranged in the machine width direction with respect to the print image and the print position on the sheet S, the selection of the print color, the transport speed and the transport timing of the corrugated cardboard sheet S to be fed in accordance with the production order. The ink ejection timing, time, printing color, etc. of the ink 30 are developed for each ink head 30. Then, the setting of the printing area and the setting of the number of times of sliding of the printing device 24 for one slide with respect to the fed sheet S are controlled.
Then, depending on the conveyance speed of the corrugated board sheet S, the printing device 2
The sliding speed of No. 4 is determined, and the printing device 24 is slid in accordance with the feeding of the conveyed corrugated cardboard sheet S, and printing is performed in accordance with one sliding. When the printing of one slide is completed, the printing device 24 quickly slides in the opposite direction to continue printing at a position following the previously completed printed matter. By repeating this, the printing of the desired one printed matter set in advance is completed.

Next, a second alternative embodiment using the printing apparatus of the present invention will be described. The embodiment disclosed in FIG. 10 is the same as the printing apparatus 24 using the ink head 30 arranged in the machine width direction described above. The embodiment in which the printing device 24 is slid by a desired amount in the sheet conveying direction is also the same as in FIG. 9, but the printing device 24 is slid in the same direction as the sheet S is fed. Printing is performed during the sliding. However, the sliding speed of the printing device 24 is to slide at a speed V2 slower than the conveying speed V1 of the sheet S. That is, the printing device 2 is more suitable than the printing device 24 that prints in accordance with the sheet S that is fixed and conveyed.
(4) The conveyance speed of the sheet S can be increased by the amount that the sheet itself slides. As a result, the relative speed of the sheet S with respect to the printing device 24 becomes faster than the conveying speed of the normal sheet S, and there is an advantage that the production efficiency is improved as compared with the production in the embodiment in which the printing device 24 is fixed to the machine. As shown in FIG. 10, the specific configuration according to the embodiment is such that flexible joints 40, 40 are provided between the stay 31 to which the ink head 30 is attached and the elevating device that elevates and lowers the printing device 24 described above. The two-dimensional movement of the lifting device for moving the printing device 24 up and down and the sliding device for sliding the printing device 24 described below are absorbed. Sliding brackets 39, 39 that are screwed into the screw shafts 41, 41 are provided at both ends.
9, 39 are attached to the stay 31. Then, at one end of the screw shafts 41, 41, drive devices 42, 42 such as servo system electric motors for rotating the screw shafts 41, 41 are attached to the frames 9, 9 via brackets 44, 44. , The bearing 4 at the other end of the screw shafts 41, 41.
The screw shafts 41, 41 are rotatably supported by 5, 45. However, in the case of this embodiment, the printing device 24 is slid in the same direction as the conveyance direction of the sheet S,
Since printing must be completed during the movement of the printer, the sliding distance of the printing device 24 is also required, and the screw shafts 41, 41 are longer than those in the other embodiment shown in FIG.
The printing device 8 itself also becomes longer in the sheet conveying direction. Then, the drive devices 42, 42 are activated and the screw shafts 41, 41
By rotating, the sliding brackets 39, 39 screwed onto the screw shafts 41, 41 slide in accordance with the rotation direction of the screw shafts 41, 41.
Ink head 3 via stay 31 attached to 9, 39
0 becomes slidable in the sheet conveying direction. In addition, the amount of sliding of the ink head 30 needs to be adjusted to control the supply amount with respect to the sheet S to be supplied and the control of the ink ejection by the ink head 30 according to the print image.
The information is fed back to the control device 28 by being measured by the rotation measuring instruments 43, 43 such as pulse generators attached to the reference numerals 2, 42. The screw shafts 41, 41 are so-called ball screws, so that the printing device 2
The sliding motion of 4 can be performed swiftly. Note that the sliding device is not limited to the above-described screw shaft or the like, and for example, an actuator such as air or hydraulic pressure using a fluid medium or the like is directly attached to the seat guide 47 and slid by the operation of the actuator. Means may be used. Further, even if a linear bearing used as a sliding system member is used instead of the above-mentioned screw shaft, the sliding effect is further improved and the mechanical performance is improved.

In the corrugated board sheet box making machine 1 according to the second alternative embodiment, the control device 24 performs the raising and lowering of the ink head 30, adjustment of the gap, adjustment of the sheet guide and the like in the same manner as the control described above, and the printing device. When the printing is performed on the sheet S by the plurality of ink heads 30 attached in the machine width direction of the printing device 24, the control centering on the printing device 24 is such that the printing image and the printing position on the sheet S according to the production order, the printing color selection, etc. Also, the ink ejection timing, time, print color, etc. by the ink heads 30 arranged in the machine width direction are developed for each ink head 30 with respect to the conveyance speed and the feeding timing of the corrugated cardboard sheet S to be fed. In this embodiment, from the relationship between the sheet conveying speed V1 and the sliding speed V2 of the printing device 24, the printing start position is that the printing starts from the front end side in the sheet conveying direction, and the sheet S conveying speed V1 Due to the speed difference from the sliding speed V2 of the printing device 24, the printing is performed toward the rear end side of the sheet S as the sheet S is conveyed. Then, the printing device 2 is operated at the transport speed V1 of the corrugated board sheet S.
The sliding speed V2 of No. 4 is determined, and the printing device 24 is slid in accordance with the feeding of the corrugated cardboard sheet S to be printed. Then, when printing is completed, the printing device 24 quickly slides in the opposite direction to continue printing on the sheet following the previously completed sheet.

Next, a third alternative embodiment using the printing apparatus of the present invention will be described. In the embodiment disclosed in FIG. 11, the printing apparatus 24 using the above-described ink head 30 arranged in the machine width direction and the embodiment in which the printing apparatus 24 is slid by a desired amount in the sheet conveying direction are also shown in FIG. Same as
It is also the same that the printing device 24 is slid in the same direction as the direction in which the sheet S is supplied and printing is performed during the sliding. However, the sliding speed of the printing device 24, the conveyance speed V of the sheet S,
Sliding at a speed V3 slower than 1. As a result, similarly to the second embodiment described above, the relative speed of the sheet S with respect to the printing device 24 becomes faster than the conveying speed of the normal sheet S, and the production in the embodiment in which the printing device 24 is fixed to the machine is performed. It has the advantage of improving its production efficiency. The specific configuration according to this embodiment is exactly the same as that of the second alternative embodiment disclosed in FIG. 10, and its detailed description is omitted.

In the corrugated board sheet box making machine 1 according to the third alternative embodiment, the control device 24 performs the raising and lowering of the ink head 30, adjustment of the gap, adjustment of the sheet guide, etc. in the same manner as the control described above, and the printing device. When the printing is performed on the sheet S by the plurality of ink heads 30 attached in the machine width direction of the printing device 24, the control centering on the printing device 24 is such that the printing image and the printing position on the sheet S according to the production order, the printing color selection, etc. Also, the ink ejection timing, time, print color, etc. by the ink heads 30 arranged in the machine width direction are developed for each ink head 30 with respect to the conveyance speed and the feeding timing of the corrugated cardboard sheet S to be fed. In this embodiment, from the relationship between the sheet conveying speed V1 and the sliding speed V3 of the printing device 24, the print start position is that the printing starts from the rear end side in the sheet conveying direction, and the sheet S conveying speed V1 Due to the speed difference from the sliding speed V3 of the printing device 24, the printing is performed toward the front end of the sheet S as the sheet S is conveyed. And
The sliding speed V3 of the printing device 24 is determined by the transport speed V1 of the corrugated board sheet S, and the printing device 24 is slid in accordance with the feeding of the transported corrugated board sheet S to perform printing.
Then, when printing is completed, the printing device 24 quickly slides in the opposite direction to continue printing at a position following the previously completed printed matter.

Next, a fourth alternative embodiment using the printing apparatus of the present invention will be described. The embodiment disclosed in FIG. 12 is the same as the printing apparatus 24 using the ink head 30 arranged in the machine width direction described above. Then, an embodiment is disclosed in which the printing device 24 is slid by a desired amount in the sheet conveying direction. That is, the printing device 24 is slid on the sheet S in the sheet conveying direction, and printing is performed at the time of sliding. At this time, the sheet S is completely stopped on the sheet conveying line. That is, by completely stopping the sheet S on the sheet conveying line, it is an object to completely eliminate printing defects due to slight vibrations due to the conveyance of the sheet S and deviation of the sheet conveyance. As a result, the sheet S is stopped from the sheet S in which only the printing device 24 is stopped.
By performing the printing while moving in the conveyance direction, there is an advantage that the printing accuracy is improved. As shown in FIG. 12, the specific configuration according to the embodiment is such that flexible joints 40, 40 are provided between the stay 31 to which the ink head 30 is attached and the elevating device that elevates and lowers the printing device 24 described above. A lifting device for lifting the printing device 24 and a sliding device for sliding the printing device 24 described below.
Absorb dimensional movement. Then, the screw shafts 41,
Sliding brackets 39, 39 screwed with 41 are provided,
The sliding brackets 39, 39 are attached to the stay 31. The screw shaft 4 is attached to one end of the screw shaft 41, 41.
Drive devices 42, 42 such as servo electric motors for rotating 1, 41 are attached to the frames 9, 9 via brackets 44, 44, and the screw shafts 41,
The other end of 41 has screw shafts 41, 4 by bearings 45, 45.
1 is rotatably supported. However, in the case of this embodiment, after the printing is completed while the sheet S is stopped, the printing device 24 has to slide with respect to the sheet by the sheet length in the sheet S transport direction. The sliding distance of the device 24 is also required, and the screw shafts 41, 41 are longer than those of the other embodiment shown in FIG. 9 described above, and the printing device 8 itself is also longer in the sheet conveying direction. In such a configuration, the drive devices 42, 42 are activated to rotate the screw shafts 41, 41, so that the sliding brackets 39, 39 that are screwed with the screw shafts 41, 41 can move the screw shafts 41, 41. The stay 31 that slides according to the rotation direction is attached to the sliding brackets 39, 39.
The ink head 30 slides in the sheet conveying direction with respect to the stopped sheet S via the. Further, the amount of sliding of the ink head 30 needs to be adjusted for controlling the printing length on the sheet S to be supplied and the control of the ink ejection by the ink head 30 in accordance with the print image, so that it is attached to the drive devices 42, 42. The information is measured by the rotation measuring devices 43, 43 such as the pulse generator, and the information is fed back to the control device 28. In addition, the screw shafts 41, 41
By using a so-called ball screw, the sliding operation of the printing device 24 can be performed swiftly. The sliding device is not limited to the above-mentioned screw shaft or the like. For example, an actuator such as air or hydraulic pressure using a fluid medium or the like is directly attached to the seat guide 47, and sliding is performed by the operation of the actuator. Means may be used Further, even if a linear bearing used as a sliding system member is used instead of the above-mentioned screw shaft, the sliding effect is further improved and the mechanical performance is improved.

In the corrugated cardboard sheet box making machine 1 according to the fourth alternative embodiment, the control device 24 performs the raising and lowering of the ink head 30, adjustment of the gap, adjustment of the sheet guide and the like in the same manner as the control described above, and the printing device. When the printing is performed on the sheet S by the plurality of ink heads 30 attached in the machine width direction of the printing device 24, the control centering on the printing device 24 is such that the printing image and the printing position on the sheet S according to the production order, the printing color selection, etc. Further, the ink ejection timing, time, printing color, etc. of the ink heads 30 arranged in the machine width direction are developed for each ink head 30. Then, printing is performed by sliding the printing device 24 on the corrugated cardboard sheet S stopped at a predetermined position. In the case of the present embodiment, when the printing device 24 slides to perform printing, the sheet S is stopped, so that printing by the printing device 24 is performed on either the front end side or the rear end side of the sheet S. It is good from Then, when printing is completed, the printing device 24 quickly slides in the opposite direction to print the next sheet S. In the above-described embodiment described above, the sheet S is stopped at the time of printing, but since the sheet conveyance speed can be set arbitrarily at the time of sheet conveyance, the time loss accompanying the sheet S stop time can be offset, and Since the printing and sheet processing are not affected when the sheet is conveyed, it is possible to increase the speed without affecting the sheet stop.
The effect of improving productivity can also be obtained.

The various ink heads 30 described above have been described by using the ink head split type embodiment in which a plurality of single ink heads having a desired size are arranged in the machine width direction. This is because it is preferable to control each ink head individually in order to perform finer control when performing print control. Therefore, in the present invention, for example, as shown in FIG. 14, an embodiment in which only one ink head 104 is arranged in the machine width direction may be used, and only one ink head 104 is arranged in the machine width direction. The means can also correspond to the various embodiments described above. Further, the control device in this embodiment is also the same as the control device and the control means described above, but different control is performed in comparison with the control in which the print image is two-dimensionally developed for each ink head arranged in the machine width direction. In the case of an ink head provided with only one group in the machine width direction, it is a means for controlling the two-dimensionally developed printed image only with this one group. Other controls are the same as the above-mentioned various controls, and thus detailed description thereof will be omitted.

Next, as a developmental example of the above-described printing apparatus according to the present invention, a corrugated board sheet box making machine having a combination of a printing unit incorporating the printing apparatus according to the present invention and a conventional printing unit can be considered. . Figure 15
In the conventional corrugated cardboard sheet box making machine 98 shown in FIG. 16, a printing unit 8 incorporating the printing device 24 of the present invention is added to the conventional corrugated board box making machine. In addition to the usual production and processing of corrugated cardboard sheets, printing is performed only when printing is performed using only the printing device 24 according to the present invention and not using the printing device 24 according to the present invention. There is a usage such as processing. In this way, the printing process according to the present invention is possible while leaving the operation range of the conventional corrugated board sheet production. Further, not only the printing process of the present invention is performed separately from the conventional printing process, but also the printing process of the present invention can be performed while performing the conventional printing process as needed. A specific example of this usage pattern is a case where only a part of the printed matter is changed in the minimum unit of order in order to meet diversifying printing needs. For example, it works effectively when the model number of the contents of the cardboard box changes individually, when the color is temporarily changed, and when additional printing is required. In any case, if the control device 28 in the production control device 23 controls the printing device 24, it has a feature that the above-mentioned production system can be easily dealt with.

[0042]

According to the printing device of the corrugated board sheet box making machine of the present invention, by providing only the printing knit 8 provided with the printing device 24 of the present invention, the conventional printing units for the number of printing colors are provided. However, the space for the printing unit and the installation cost are required, but the space may be only the space for 81 printing units provided with the printing device 24 of the present invention. In addition, although the introduction costs cannot be unequivocally compared, the printing unit requires at least four full-color printing with a conventional cardboard sheet box making machine.
However, since only one unit is required in the printing unit 8 provided with the printing device 24 of the present invention, the number of parts such as the machine frame is surely reduced, and the machine manufacturing cost can be reduced and the machine can be carried in due to the cost reduction. It is possible to reduce the introduction cost such as.
Then, the machine introduction side has an advantage that the number of printing colors need not be selected.

Further, since the printing apparatus 24 of the present invention does not require a printing plate or the like, there is no need for a printing plate introduction cost for each production order, a management burden after the printing plate introduction, and a maintenance cost thereof, unlike the conventional case. . Further, there is no need to change the printing plate for each order change, the workability of the operator is improved, the work load is reduced, and the danger associated with the work is released. And since the printing form has changed significantly, the need for ink circulation as in the past has been eliminated, and the ink washing process has also been eliminated.
It will lead to a dramatic effect by reducing the work time associated with ink recovery and cleaning work, improving the environment around the machine, reducing ink consumption costs, and improving environmental problems due to waste liquid.

Further, from the above, it is possible to cope with so-called small lot production, and it is possible to meet diversifying printing needs. Further, according to the printing apparatus of the present invention, since no special mechanism is required on the upstream side or the downstream side of the printing apparatus, it becomes possible to incorporate the printing apparatus of the present invention into an existing corrugated board sheet box making machine. Also, the printing machine of the present invention can be introduced without a large capital investment on the side of a machine user who owns an existing corrugated board box making machine, and an economic effect can be obtained. If the existing cardboard sheet box making machine is for two-color printing, by incorporating the printing apparatus of the present invention, it can perform printing such as three-color printing if shared with the existing cardboard sheet box making machine. The effect of expanding the range of use of is also obtained.
Furthermore, sample printing can be easily performed, and the degree of freedom is improved.

[Brief description of drawings]

FIG. 1 is a side view showing a cardboard sheet box making machine provided with a printing apparatus of the present invention.

FIG. 2 is a plan view showing an example in which an ink head in the printing apparatus of the present invention is arranged in the machine width direction.

FIG. 3 is a plan view showing an example in which the ink heads are arranged in the machine width direction and the ink heads are arranged in a zigzag manner in the printing apparatus of the present invention, and an elevating mechanism of the printing apparatus.

FIG. 4 is a view on arrow XX in FIG.

FIG. 5 is a side view showing a configuration of a sheet guide.

FIG. 6 is a front view showing a configuration of a sheet guide.

FIG. 7 is a plan view showing an embodiment in which a printing situation on a corrugated board sheet by the printing apparatus of the present invention is developed in a plane.

FIG. 8 is a plan view showing an embodiment in which sheet passing production with no sheet interval is developed in a plane in a printing situation on a corrugated board sheet by the printing apparatus of the present invention.

FIG. 9 is a plan view showing another embodiment in which printing is performed by sliding the printing device in the direction opposite to the sheet conveying direction in the embodiment in which the ink heads are arranged in the machine width direction in the printing device of the present invention. is there.

FIG. 10 is a view showing an example in which the ink heads are arranged in the machine width direction in the printing apparatus of the present invention, the printing apparatus is slid in the same direction as the sheet conveying direction, and the sheet conveying speed and the sliding speed of the printing apparatus. FIG. 11 is a plan view showing a second another example in which printing is performed with a speed difference between

FIG. 11 is a diagram showing an example in which the ink heads are arranged in the machine width direction in the printing apparatus of the present invention, in which the printing apparatus is slid in the same direction as the sheet conveyance direction, and the sheet conveyance speed and the sliding speed of the printing apparatus. FIG. 13 is a plan view showing a third another example in which printing is performed with a speed difference between

FIG. 12 is a plane view showing a fourth alternative embodiment in which printing is performed by sliding the printing device in a state where the sheet is stopped in the printing device of the present invention in which the ink head is arranged in the machine width direction. It is a figure.

FIG. 13 is a side view showing a configuration of a measuring device for a sheet guide.

FIG. 14 is a plan view showing an example in which a single ink head is arranged in the machine width direction in the printing apparatus of the present invention.

FIG. 15 is a diagram showing an advanced embodiment using the printing apparatus of the present invention.

FIG. 16 is a side view showing a conventional corrugated board box making machine.

[Explanation of reference numerals] 1 Corrugated board box making machine 8 Printing unit 10 Sheet conveying device 11 Suction box 12 Sheet feeding roller 23 Production management device 24 Printing device 25 Ink tank 26 Ink pump 27 Input section 28 Control device 30 Ink head

Continued front page    F-term (reference) 2C056 EA24 EA30 EB58 EC12 EC31                       EC33 FA10 FA13 FB01 HA29                 2C062 RA01                 3E075 AA04 BA01 CA01 DA03 DA04                       DA05 DA14 DA32 DB16 DB22                       DE23 GA05

Claims (14)

[Claims] 1. A corrugated board sheet printing apparatus for performing desired printing on a corrugated board sheet, and an ink projecting portion for ejecting desired liquid ink onto the corrugated board sheet from a position separated from the corrugated board sheet, and ink is supplied to the ink projecting portion. An ink supply unit, an ink storage unit that stores liquid ink to be supplied to the ink protrusions via the ink supply unit, a print image to be printed on a corrugated cardboard sheet are input in advance, and the print image is conveyed. In order to print on a corrugated cardboard sheet, the control device controls a jet of ink from the ink protruding portion, and the control device two-dimensionally develops a print image in the machine width direction and the sheet conveying direction, A cardboard sheet stamp characterized by printing ink on the cardboard sheet by ejecting ink from the ink head onto the sheet Apparatus. 2. A plurality of the ink protrusions are arranged in the machine width direction, and a two-dimensional development of a print image in the machine width direction and the sheet conveyance direction is performed by the control device to convey the corrugated cardboard sheet. 2. The corrugated board sheet printing apparatus according to claim 1, wherein the corrugated board sheet is printed by ejecting ink from a plurality of ink heads arranged in the machine width direction. 3. A plurality of the ink protrusions are arranged in the machine width direction and the sheet conveying direction, and a plurality of ink protrusions arranged in the machine width direction and the sheet conveying direction are arranged in the machine width direction. The printing areas formed by the ink protrusions are arranged so as to overlap with each other, and the control device two-dimensionally develops a print image in the machine width direction and the sheet conveyance direction to convey the corrugated cardboard sheet in the machine width direction and the sheet. The cardboard sheet printing apparatus according to claim 1, wherein ink is jetted from a plurality of ink heads arranged in the transport direction to perform printing on the cardboard sheet. 4. The corrugated cardboard which is a single ink projection in the machine width direction and which is two-dimensionally developed by the control device in the machine width direction and the sheet conveyance direction to be conveyed. The corrugated board sheet printing apparatus according to claim 1, wherein the corrugated board sheet is printed by ejecting ink from a plurality of ink heads arranged in the machine width direction on the sheet. 5. A corrugating device for sliding the ink protrusions in the sheet conveying direction is provided, and when the ink protrusions slide on the conveyed corrugated cardboard sheet, printing is performed on the corrugated cardboard sheet. The corrugated board sheet printing apparatus according to claim 2. 6. The corrugated board sheet printing apparatus according to claim 5, wherein printing is performed on the corrugated board sheet when the ink protrusion is slid in a direction opposite to the conveyed corrugated board sheet. 7. The printing is performed on the corrugated cardboard sheet by sliding the ink protrusion in the same direction as a corrugated cardboard sheet to be conveyed, and providing a speed difference between the sliding speed of the ink protrusion and the conveyance speed of the corrugated cardboard sheet. Item 5. A corrugated board sheet printing apparatus according to item 5. 8. The corrugated board sheet printing apparatus according to claim 7, wherein sliding is performed at a sliding speed of the ink projecting portion that is slower than a conveying speed of the corrugated cardboard sheet, and printing is performed from a front end side of the corrugated cardboard sheet being conveyed. 9. The corrugated cardboard sheet printing apparatus according to claim 7, wherein the corrugated cardboard sheet is printed at a rear end side of the corrugated cardboard sheet that is conveyed by sliding at a sliding speed of the ink protrusion portion that is higher than a conveying speed of the corrugated cardboard sheet. 10. A sliding device for sliding the ink protrusions in the sheet conveying direction is provided, and after the corrugated sheet is conveyed and stopped at a desired position, the ink protrusions slide on the corrugated sheet. The corrugated board sheet printing apparatus according to claim 1, wherein printing is performed on the corrugated board sheet when the corrugated board sheet is printed. 11. A plurality of the ink protrusions are arranged in the machine width direction, and a two-dimensional development of a print image in the machine width direction and the sheet conveyance direction is performed by the control device, and the machine width is applied to the corrugated board sheet. 11. The corrugated board sheet printing apparatus according to claim 10, wherein ink is jetted from a plurality of ink heads arranged in a direction to print on a corrugated board sheet. 12. The plurality of ink protrusions are arranged in the machine width direction and the sheet conveying direction, and the plurality of ink protrusions arranged in the machine width direction and the sheet conveying direction are arranged in the machine width direction. The printing areas of the ink protrusions are arranged so as to overlap with each other, and the control device two-dimensionally develops a print image in the machine width direction and the sheet conveyance direction,
11. The corrugated board sheet printing apparatus according to claim 10, wherein ink is ejected from a plurality of ink heads arranged in the machine width direction and the sheet conveying direction on the corrugated board sheet to perform printing on the corrugated board sheet. 13. The ink protrusion is a single ink protrusion in the machine width direction, and the control device two-dimensionally develops a print image in the machine width direction and the sheet conveyance direction,
The cardboard sheet printing apparatus according to claim 10, wherein ink is ejected from a plurality of ink heads arranged in the machine width direction on the cardboard sheet to print on the cardboard sheet. 14. The printing device comprises a paper feeding unit for feeding a corrugated cardboard sheet, a printing cylinder wound with a desired printing plate, an ink transfer roll for transferring ink to the printing plate, and a squeeze roll. ,
Corrugated cardboard comprising a printing unit that supplies ink to the ink reservoir formed between the two rolls, transfers the ink to the stencil printing plate by both rolls, and prints on the fed corrugated cardboard sheet S. The corrugated board sheet box making machine according to claim 1, which is arranged on the downstream side or the upstream side of the sheet box making machine.