JPS5917676B2 - rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary printing press, and more particularly to a desktop type industrial rotary printing press suitable for printing with a small width of printing material and a small size of a plate.

Conventional industrial printing is used under a system in which printed materials are centrally printed at a specific location such as a printing factory and then delivered to each user, and the printing machines are also large. Since it was suitable for large-volume printing, it had the disadvantage that it became extremely inefficient when printing in small quantities of a wide variety of products or when the plate shape was small.

In contrast, the printing machine according to the present invention is suitable for printing small pieces on which are displayed, for example, quality indications for use by sewing on clothing, caution indications for cleaning and ironing, etc. Rather than central printing by printing companies,
It was developed to enable print users such as garment manufacturers to print according to their needs; the purpose is to provide a tabletop rotary printing press that is small and lightweight enough to be easily carried.

Next, the present invention will be described with reference to an embodiment of two-color offset printing. Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a partial sectional view of the plan view, Fig. 3 is a diagram showing the power transmission configuration of the above embodiment, and Fig. 4 is a diagram showing the cutting device of the above embodiment. FIG.

The printing press is assembled into a rectangular shape with the rectangular front fixed plate 1 and rear fixed plate 2 arranged in parallel as the center, and the bearings arranged on the above two fixed plates 1 and 2 are attached to the bearings, which will be described later. In front of the front fixing plate 1, various rolls such as a printing material roll, a dough roll, a plate roll, and a pressing roll are supported in a cantilever manner. The blade of the cutting device is provided in a cantilevered manner at the end.
A force transmission mechanism such as gears and pulleys for rotationally driving or interlocking each roll shaft is provided between the two fixing plates 1 and 2, and behind the back fixing plate 2, A coupling mechanism is provided for synchronizing the cutting device with the rotation of the rotor.

The configuration of each part will be specifically explained below.

The structure of each roll in front of the front fixing plate 1 will be explained with reference to FIG. A supply roll 10 on which a printing material G such as a tape-like cloth, paper, or plastic is wound into a roll is loosely fitted onto a fixed shaft 11 in a detachable manner, and the printing material G is pulled out from the lower end of the roll 10 and placed under tension It passes through the roll 12, is introduced between the printing roll 13 and the pressure roll 14, where printing is applied, passes through a pair of bowing rolls 15, 16, and the guide 17, and is then introduced between the fixed blade 19 and the movable blade 20 of the cutting device 18. It is then cut to a predetermined size. In the printing roll 13, a first color plate roll 21A and a second color plate roll 21B are rotated in contact with each other, and a metal ink roll serving as an ink supply source is connected to the first color plate roll 21A. 26A1 A rubber ink mixing roll 25A that is pivotally supported by an eccentric member and can be switched between the (1) side contact state and the () side contact state by an operation lever 27A, and a metal intermediate mixing roll 24A that rotates horizontally.
, rubber inking rolls 22A and 23A constitute a first unit and each rotate in the direction of the arrow. The same is true for the roll group related to the second color plate roll 21B,
In the figures, the same numbers are used for the same parts, and the subscript A is replaced with B to represent this. Note that a corona discharge type static electricity remover 28 is provided near the cutting device 18. next,
The power transmission mechanism between the fixed plates 1 and 2 will be explained with reference to FIGS. 2 and 3.

One motor 30 drives a first driven shaft 32 to which a pulley 31 is attached by belt transmission, and all the rolls are driven by gear transmission via a first gear 33 fitted and fixed to this shaft 32. be done.

The gears related to each of these rolls include a gear 34 related to the printing roll 13, a gear 35A related to the printing roll 21A or 21B, and a gear 35A related to the printing roll 21A or 21B.
Gear 36 related to 35B1 ink roll 26A or 26B
A, 36B1 Gear 37A, 37B related to intermediate kneading roll 24A or 24B, inking roll 22A, 23A or 22
Gears 38A, 39A, 38B, 39B related to B, 23B
It is. A gear 40 that meshes with the first gear 33, a small gear 41 that is a rotating shaft with the gear 40, and a gear 42 that meshes with the small gear 41 constitute a transmission mechanism, and the low speed gear 4
2 is provided coaxially with a gear 38A related to the inking roll 22A. The gears 36A, 36B related to the ink roll are directly meshed with the high speed side gear 33, whereas the gears 37A, 37B, 38A, 3 related to the other rolls are in direct mesh with the high speed side gear 33.
8B, 39A, 39B, 35A, 35B, and 34 are in mesh with each other with an effective diameter equal to the diameter of each roll. Next, the cutting device 18 and its driving mechanism will be explained with reference to FIGS. 2 and 4.

A shaft 43 associated with the printing roll 13 protrudes behind the back surface fixing plate 2, and a command drum 44 is mounted thereon. This command drum 44 is equipped with a clutch device (not shown) that can transmit the power of the shaft 43 to the drum member 45 and adjust the positional relationship between the two as necessary, and a clutch device (not shown) that can cut the clutch in synchronization with the rotation angle of the printing roll shaft 43. A cam arrangement is provided for actuating the device 18. This cam device cuts 1/1, 1/2, 1/3, and 1/1 per rotation of the printing roll 13.
The structure is such that the presence or absence of cutting, such as 4-cutting or continuous winding, and its dimensions can be freely set. That is,
Several pins 46 are arranged along the circumference of the drum member 45, and these pins 46 can have two stable states, a pulled state and a pushed state, and in the pulled state, the cam lever 47 is When the cam lever 47 is not activated and is pressed, the tip of the cam lever 47 is moved to the rear end 48 of the movable blade 20.
Push up. The cutting device 18 has a fulcrum 49 relative to the fixed blade 19.
It is a scissors-type device in which a movable blade 20 with a center moves, the cutting parts of the fixed blade 19 and the movable blade 20 protrude in front of the front fixed plate 1, and the cutting line is perpendicular to the surface of the fixed plate 1. When the rear end 48 of the movable blade 20 is pushed up by the lever 47, the printing material G is cut, and the movable blade 20 is returned to its original position by the bow tension spring 50. Next, the operation of the above embodiment will be explained. To supply ink, first place the ink on the ink roll 26A or 26B, and then press the operating lever 27A or 27.
B to the (1) side, rotate the mixing roll 25A or 25B at high speed to thoroughly mix and spread the ink, then turn the operating lever to the () side, and continue kneading between the intermediate mixing rolls 24A or 24B. It is supplied in small quantities via inking rolls 22 and 23 to plate roll 21A or 21B. In printing on the printing material G, the first color portion is first inked by pressure contact between the first printing roll 21A and the printing roll 13, and then by the rotation of the printing roll 13, the printing is applied to the second printing roll 21B. The second color portion is inked on top of the first color portion through pressure contact, and this is pressed against the printing material G to perform two-color overprinting. The cutting device 18 is configured such that, for example, the setting pin 46 is
20. When only 3 buttons are pressed at intervals of
Three cuts are carried out per revolution of the printing roll 13 and, for example, when all setting pins 46 are in the pulled position, the cutting device 18 is not activated at all. The present invention is not limited to the above embodiments, and can be similarly implemented, for example, in multi-color printing with three or more colors or double-sided printing.
Further, an automatic supply device such as an ink rail or an ink pump can be added to the ink roll.

Furthermore, the cutting device of the present invention is not limited to a mechanical cutter, but can be replaced with a known cutting device such as a laser beam, and the means for synchronizing the roll shaft and the cutting device is electrical contact or non-contact sensing. It can be easily replaced with an electrical synchronization means using an element. According to the invention,
As mentioned above, the front fixing plate and the back fixing plate are centered, the power transmission part is placed between the two fixing plates, the rolls are cantilevered in front of the front fixing plate, and the rolls are cut behind the back fixing plate. Since it is composed of an interlocking device, the entire rotary printing press can be made dramatically smaller and lighter. By the way, the shape dimensions in the example are 22 cTn in height and 35 cm in width.
cTn. The overall depth was 17cm. Furthermore, according to the present invention, all the rolls are cantilever-supported in front of the front fixed plate, so it is not necessary to replace the supply rolls, insert the tape to be printed, or change the plate rolls when changing the printing content. Replacement work etc. can be done very easily, as well as
Since the indicator drum provided with the setting pin and the adjustment points related to the interlocking mechanism are all disposed behind the rear fixed plate, adjustment work etc. can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a partial sectional view of the plan view, FIG. 3 is a diagram showing the power transmission section in the above embodiment, and FIG. It is a side view showing a cutting device in an example. 1...Front fixing plate, 2...Back fixing plate, 10...ν...Printing material supply roll, 13...
...Printing roll, 14...Pressure roll, 21A
, 21B... version roll, 22A, 22B, 23
A, 23B... Fleshing roll, 24A, 24B.
...Intermediate kneading roll, 25A, 25B...
・Kneading roll, 26A, 26B... Ink roll, 18... Cutting device, 19... Fixed blade, 20... Movable blade, 44... ... Command drum, 46 ... Setting pin, 47 ... Cam lever.

Claims (1)

[Scope of Claims] 1. Shafts such as a printing roll shaft, inking roll shaft, plate roll shaft, pressure roll shaft, etc. are supported by a front fixing plate and a back fixing plate, and each of the above-mentioned shafts is rotationally driven between the two fixing plates. A power transmission mechanism such as a gear is provided for printing, and rolls such as a printing material supply roll, a printing roll, an inking roll, a plate roll, and a pressure roll are provided in front of the front fixed plate in a cantilever manner to carry out printing. A cutting device that cuts the finished printing material at a predetermined position is installed so that the cutting portion protrudes in front of the front fixing plate and the cutting direction is substantially perpendicular to the front fixing plate, and the cutting device is attached to the printing roll shaft or the printing roll shaft. A rotary printing press comprising an interlocking mechanism provided at the rear of the back fixed plate for interlocking the rotation angle position of the interlocking shaft and the cutting device. 2. The cutting device is of a scissor type, with its fixed blade and movable blade protruding forward of the front fixed plate, with a cam device attached to the printing roll shaft or a shaft interlocking therewith, and driven by the cam device. 2. The rotary printing press according to claim 1, wherein said movable blade is driven by a cam lever.