JP3606752B2 - Printer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing press, and more particularly to a printing press configured to be capable of printing in units of millimeters by simply exchanging a gear and a cylinder.
[0002]
[Prior art]
Generally, a printing press has a single sheet feeding device provided with an infeed device as necessary, a plurality of printing units, and processing devices such as a drying device, a cooling device, and a processing device arranged in series. It is driven by a single driving shaft driven by a motor (see FIG. 1), and is configured to support printing in units of inches. Each device is driven by a single driving shaft driven by a single motor. When there are a plurality of drive sources, the rotational speed differs depending on the characteristics of each drive source, and a phase shift occurs between the devices. This is because of such inconveniences. In addition, when the plate cylinder is replaced in the printing unit or when the printing unit is regularly cleaned during printing, the printing unit operates independently from other devices. The motor shaft is connected to a driving shaft through a clutch.
[0003]
In general, the printing unit includes a printing machine main body and a print exchange cassette that can be attached to and detached from the printing machine main body, and the driving force to the printing unit is transmitted from the driving shaft to the printing machine main body via a plurality of gears. And is further transmitted to the printing exchange cassette side provided with each cylinder including a plate cylinder via a plurality of gears.
[0004]
[Problems to be solved by the invention]
By the way, recently, printing in units of millimeters is often required, but conventional printing presses are configured to support inches, so when printing in units of millimeters, non-printing is performed on printing paper. There is an inconvenience that a part is generated and is wasteful, and the operation of removing the non-printing part is complicated.
[0005]
For example, when printing a printed matter with a top and bottom direction of 120 mm, a conventional inch-type cylinder uses a 5-inch type cylinder. In this case, since 5 × 25.4 = 127, A cylinder with a circumference of 127 mm results in a non-printing part of 7 mm in the vertical direction.
[0006]
Further, as described above, since one driving shaft is involved in driving all the printing presses, it is technically difficult to change only the printing unit so as to correspond to the millimeter unit and has not yet been realized. Conventionally, a printing machine capable of handling millimeters has a disadvantage that a dedicated machine must be manufactured separately.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a printing machine capable of solving such inconveniences and changing a printing machine corresponding to an inch unit to a millimeter unit only by changing a gear and a cylinder of the printing unit. To do.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the printing machine according to claim 1 of the present invention has processing devices such as a paper feeding device, a plurality of printing units, and a drying device arranged in series so as to form a single main motor. A printing machine configured to obtain a driving force of a processing device such as the paper feeding device, a plurality of printing units, and a drying device by a rotational driving force of one linked driving shaft, wherein each of the printing units is The printing machine main body and a printing exchange cassette which is detachable from the printing machine main body and provided with each cylinder including a plate cylinder, and the driving force to each printing unit is from the driving shaft to the printing machine main body side. Are transmitted to a pair of helical gears that mesh with each other via a plurality of gears, and further transmitted from one of the pair of helical gears to each cylinder on the printing exchange cassette side via a plurality of gears. And each cylinder on the printing exchange cassette side The circumference of each driven gear is set so as to be suitable for printing a print object to be printed in millimeters, and the cylinder, the circumference of each gear, and the cylinders for inch printing are set. In order to eliminate the increase / decrease in the ratio with the circumference of each gear , the gear ratio is changed by changing the torsion angles of the pair of helical gears on the printer body side.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a schematic side view showing the entire printing machine, FIG. 2 is a schematic plan view showing a drive system of the printing machine, and FIG. 3 is a schematic front view showing a drive system of the printing unit. is there.
[0010]
As shown in FIGS. 1 and 2, the printing machine 1 includes a paper feeding device 2, an infeed device 3, five printing units 4a, 4b, 4c, 4d, and 4e, a drying device 5, a cooling device 6, and a processing device. 7 and a stacker device 8. A driving shaft 10 driven by a main motor 9 is connected to the infeed device 3, the printing units 4 a, 4 b, 4 c, 4 d, 4 e, the drying device 5, the cooling device 6, the processing device 7, a clutch and The driving force is transmitted through a plurality of gears.
[0011]
Next, the configuration of the drive system of the printing units 4a, 4b, 4c, 4d, and 4e will be described. Since these are the same configuration, only the printing unit 4a will be described with reference to FIG. The printing unit 4 a includes a printing machine main body 11 and a print exchange cassette 12 that is detachably attached to the printing machine main body 11. The printing machine main body 11 includes a gear 14 that meshes with a gear 13 that is linked to a gear box 32 that is linked to the driving shaft 10 at one end, and a drive shaft 16 that is equipped with a helical gear 15 at the other end. I support it. The helical gear 15 meshes with the helical gear 17, and a gear 19 is attached to the other end of the drive shaft 18 to which the helical gear 17 is attached. Each of the helical gears 15 and 17 has a function of adjusting the printing position at the top and bottom.
[0012]
The gear 19 meshes with a gear 20 that is rotatably supported by the machine frame of the printing press main body 11, and this gear 20 is also meshed with a gear 21 that is rotatably supported by the machine frame of the printing press main body 11. Further, the gear 21 meshes with a gear 22 that is rotatably supported by the machine frame of the printing press main body 11. The gear 22 meshes with a gear 25 provided on a rotary shaft 24 of a plate cylinder 23 that is rotatably supported by the machine frame of the printing exchange cassette 12. Further, the gear 25 meshes with a gear 28 provided on a rotation shaft 27 of a blanket cylinder 26 rotatably supported on the machine frame of the print exchange cassette 12, and this gear 28 is also connected to the machine frame of the print exchange cassette 12. It meshes with a gear 31 provided on a rotary shaft 30 of an impression cylinder 29 that is rotatably supported.
[0013]
In the conventional printing unit, the gear ratios of the helical gears 15 and 17 meshing with each other are set to 1: 1, and the gears provided on the rotary shafts 24, 27, and 30 of the cylinders 23, 26, and 29, respectively. The gear ratios of 25, 28, and 31 are also set to 1: 1. Then, when the rotation amount corresponding to the 1-inch feed of the main motor 9 is transmitted to the driving shaft 10, this is transmitted to the cylinders 23, 26, 29 via the gears 13 to 31, and the cylinders 23, 26, 29 are transmitted. Is rotated by an amount corresponding to 1 inch feed.
[0014]
As specific examples of normal use, each of the helical gears 15 and 17 has m of 2, the number of teeth is 48, the twist angle is 33 degrees, and the diameter is 114.46 mm. The circumference of each of the cylinders 23, 26, 29 is 14 inches (355.6 mm as 1 inch 25.4 mm), the number of teeth of the gears 25, 28, 31 of these cylinders 23, 26, 29 is 56, and the circumference is Same as cylinders 23, 26, 29 and 14 inches (355.6 mm), thus the diameter is from 355.6 / π to about 113.191 mm.
[0015]
In the present embodiment, for example, when a print product with a top and bottom direction of 120 mm is printed with three sides in the top and bottom direction, the length in the top and bottom direction of one unit of the print product is 360 mm. If the circumference is 360 mm, it is sufficient. Here, since an error of ± 0.2 mm is allowed, the circumference may be in the range of 359.8 to 360.2 mm. For this reason, the peripheral lengths of the gears 23, 26, and 29 may be in the range of 359.8 to 360.2 mm, and the diameters may be in the range of 114.52 to 114.66 mm.
[0016]
Now, if the circumference of each cylinder 23,26,29 is set to 360.045mm, the circumference of 360.045mm of each cylinder 23,26,29 of this embodiment, and each cylinder 23 of the above-mentioned normal use example, The gears 25, 28, and 26 of the printing unit 4a are set so that the product of the ratio value of the peripheral lengths 26, 29 to 355.6 mm and the reciprocal of the gear ratio values of the helical gears 15, 17 is 1. If the cylinder 31 and each of the cylinders 23, 26, 29 are changed, the other devices 5, 6, 7 are not affected at all, and the rotational driving force of the driving shaft 10 by the main motor 9 is the same as that of the infeed device 3. You will receive it as it is. In other words, in each of the cylinders 23, 26, 29, the speed is increased compared to the case of the inch unit, so that the increased speed can be reduced by the helical gears 15, 17.
[0017]
The gear ratios of the helical gears 15 and 17 satisfying this condition are: circumference of cylinder corresponding to millimeter unit / perimeter of cylinder corresponding to inch unit = 360.045 / 355.6 = 81/80. The reciprocal is taken to be 80/81, that is, 80 to 81. The gear ratio can be changed without changing the inter-axis distance by changing the twist angle of the helical gears 15 and 17.
[0018]
Specifically, the helical gear 15 is a CP1 / 6 standard, the number of teeth is 80, the twist angle is 18.611 degrees right twist, the diameter is 113.749, and the helical gear 17 is CP1 / CP1. The gear number is 81, the twist angle is 18.611 degrees to the left, and the diameter is 115.171. The gears 25, 28, 31 are CP 1/4 standards, the number of teeth is 56, the diameter is 114.606, and the body 23, 26, 29 is the body 114.606.
[0019]
By changing to the helical gears 15 and 17, the gears 25, 28, and 31 and the cylinders 23, 26, and 29 that meet the above conditions, the other drive system can be changed without changing the drive system. Printing in millimeters can be performed on the printing machine 1 without waste due to non-printing portions.
[0020]
The present invention is not limited to the above-described embodiment, and the gear ratios of the helical gears 15 and 17 are changed so that the gear ratios are adapted to millimeter units, and the gears 25, 28, What is necessary is just to determine according to the change of the perimeter of 31. At this time, the gear ratios of the helical gears 15 and 17 are inverse ratios of changes in the circumferential lengths of the barrels 23, 26, and 29 and the gears 25, 28, and 31. It is necessary to have an integer ratio corresponding to 17 teeth.
[0021]
【The invention's effect】
Thus, according to the printing machine according to the first aspect of the present invention, it is possible to perform printing corresponding to millimeter units by simply replacing the helical gear and each cylinder of the printing unit in the conventional inch-type printing machine. Can be performed without waste due to the occurrence of non-printing parts, so there is no need to prepare a dedicated printing machine for millimeter units, and it is economical and without impairing the operation of other processing devices. In addition to being able to perform a simple printing operation, the gear ratio can be changed without changing the inter-axis distance by changing the helical angle of the helical gear .
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an entire printing machine.
FIG. 2 is a schematic plan view showing a drive system of a printing press.
FIG. 3 is a schematic front view showing a drive system of a printing unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Printing machine 2 Paper feeder 3 Infeed apparatus 4a, 4b, 4c, 4d, 4e Printing unit 5 Drying apparatus 6 Cooling apparatus 7 Processing apparatus 8 Stacker apparatus 9 Main motor 10 Driving shaft 11 Printing machine main body 12 Printing exchange cassette 15, 17 helical gear 23 plate cylinder 25, 28, 31 gear 26 blanket cylinder 29 impression cylinder

Claims (1)

Processing devices such as a paper feeding device, a plurality of printing units, and a drying device are arranged in series, and the feeding device and the plurality of printings are driven by the rotational driving force of a single driving shaft linked to a single main motor. A printing press adapted to obtain a driving force of a processing device such as a unit or a drying device, wherein each printing unit is detachable from the printing press main body and the printing press main body, and includes a printing cylinder. A printing exchange cassette provided with each cylinder, and the driving force to each printing unit is transmitted from the driving shaft to a pair of helical gears that mesh with each other via a plurality of gears on the printing machine main body side, and It is configured to be transmitted from one of the pair of helical gears to each cylinder on the print exchange cassette side via a plurality of gears, and the circumference of each cylinder on the print exchange cassette side and each gear driving the cylinder is set. Print the printed material to be printed in millimeters In order to eliminate the increase / decrease in the ratio between the circumference of each cylinder and each gear set and the circumference of each cylinder and each gear when printing in inches, A printing machine characterized in that the gear ratio is changed by changing each twist angle of a pair of helical gears on the side.

Images