JPH0649368B2 - Label printing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a printing machine for labels, which facilitates plate registration and enables economical printing of small-lot labels.

(Prior Art) Label printing is to print on a tape-shaped printing object (hereinafter simply referred to as tape) at regular intervals, and the printing press is roughly classified into a flat pressure type and a rotary type, and the former flat pressure type. The equipment is inexpensive, but the printing finish is inferior to the rotary type, and the reverse is the reverse for the rotary type.

In addition, the rotary type is that the tape is continuously fed,
Some of them are sent intermittently, and those of continuous feeding are suitable for mass printing, and the printing machines are large and mainly used by large-scale contractors. On the other hand, those that are intermittently fed are plates in a fixed position. Only when the cylinder rotates and print, the impression cylinder presses the tape on the outer circumference of the plate cylinder, printing is performed while moving the tape following the rotation of the plate cylinder, and the intermittently fed tape is stationary. In some cases, printing is performed by rolling the plate cylinder in a direction orthogonal to the traveling direction of the tape.

The type that rolls this plate cylinder in the direction orthogonal to the tape traveling direction is to install multiple plates for multiple colors on a plate cylinder at regular intervals and to accurately mount them. The tape was sent intermittently, and printing was performed while overlapping the colors by the number of plates.

(Problems to be Solved by the Invention) In each of the above-described various conventional label printing machines, it is necessary to attach the plate to the plate cylinder extremely accurately when performing multicolor printing. The plates are attached to the plate cylinder and the position is adjusted until they match, but the plate alignment was the biggest difficulty.

Further, since the rotary type plate cylinder for continuous printing needs to be a plate all around, it is necessary to prepare various plate cylinders with a circumferential length suitable for the size of the plate. It was an economy.

Also, in the system in which the tape moves following the plate cylinder only when printing, the tape slightly overruns during printing, so it is necessary to pull back the tape by the amount of overrun each time to adjust the printing interval. However, in this case, adjusting the movement of the plate cylinder and the timing of the tape movement was a laborious task.

The problem of label printing is that the time required for preparatory work such as plate matching and timing adjustment before starting normal printing and the waste of waste paper for trial printing are large. Usually, it drops to about 50%. Especially in the case of small lots, when the cost for preparation is added to the label unit price, the addition rate becomes large and it becomes an extremely expensive label. There was a problem that it was difficult to obtain profit.

The problem that the preparation for the normal printing takes time and the small lot printing becomes difficult has been a trouble in the industry for many years, and the present invention aims to solve this problem.

(Means for Solving the Problems) The present invention for achieving the above-mentioned object is to provide a letterpress on the outer circumference for reciprocally rolling in the traveling direction of the tape when printing the tape that moves intermittently and printing both reciprocations. A plate cylinder unit provided with an inking roll device, a reciprocating means, etc. on a plate cylinder for rotary printing by pasting a lithographic plate, is arranged in a number that can satisfy the number of colors required for multicolor printing along the tape, and On the plane parallel to the printing surface of the tape, each plate cylinder unit can be moved and adjusted in a traveling direction of the tape, a direction orthogonal to the traveling direction, and a direction inclined to the direction orthogonal to the traveling direction. It is a printing machine for labels, which is configured in.

(Function) In the printing machine for these labels, when the tape that is intermittently fed through the plurality of plate cylinder units provided for each color is stopped, the plate cylinder rolls back and forth in the tape traveling direction. It prints both back and forth, and multi-color printing by sequentially overlapping colors,
It is necessary to position the plate cylinders so that the length of the tape between the plate cylinders is exactly the same as the printing pitch, which is an integer multiple of the printing pitch. On a plane parallel to the surface, the front, rear, left and right, and the tilt direction are adjusted individually with respect to the traveling direction of the tape while continuing printing to perform plate matching.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

In the following description, a direction parallel to the traveling direction of the tape will be referred to as "front-back direction", and a direction orthogonal to the front-back direction will be referred to as "lateral direction".

1 to 4 are schematic diagrams showing the printing method of the present invention in a simplified manner, in which (1) is a plate cylinder, and the plate cylinder (1) is not shown in order to avoid complication of the drawings. However, the printing pressure adjusting device, the inking roller device, and the set of the plate cylinder unit in which the tape receiving plate contacting the back surface of the tape is set to constitute a set of plate cylinder units. The necessary number of prints are arranged and mounted on the main body of the printing machine (not shown) in a positionally adjustable manner.

This plate cylinder (1) is composed of a missing cylinder (may be a cylinder), a plate (3) consisting of a relief plate or a planographic plate is attached to an arc surface, and a pinion (4) is attached to one end.

A blanket cylinder may be used instead of the plate cylinder.

Reference numeral (5) is a rack, and as the pinion (4) is engaged and rotated, as shown in FIG. 2, it is further rotated 3/4 from the position (A) in the direction of the arrow to the position (B) and further 3/4.
The tape (2) is rotated and stopped at the position (C), and while the tape is rotating 1.5 times in the forward direction from the position (A) to the position (C), the plate (3 ) Is transferred and printed,
Next, when the tape (2) is moved by one pitch of the label to be printed and stopped again, the plate cylinder (1) stopped at the position (C) rotates 3/4 rotation in the backward direction indicated by the arrow ( After passing through the position of (B), it returns to the position of (A) and stops, and while the tape (2) rotates in the backward direction from the position of (C) to the position of (A) for 1.5 rotations, the tape (2 ) Is similarly printed, and printing is performed twice during one reciprocating rolling movement of the plate cylinder (1).

Label printing is continuously performed on the tape (2) by repeating this reciprocal printing.

Further, the plate cylinder unit is arranged on the plane parallel to the tape (2), as shown in FIG. 3, in the front-back direction (XX ′) which coincides with the traveling direction of the tape (2) and the tape (2). It is configured to be adjustable in a left-right direction (Y-Y ') orthogonal to the traveling direction and an inclination direction (ZZ') with respect to a direction orthogonal to the traveling direction of the tape (2).

An example of this adjustment range is 100 mm in the front-rear direction (XX ′), 5 mm in the middle adjustment, 5 mm in the left-right direction (YY ′), and the tilt direction (Z−Z ′). It is enough to make fine adjustment to 3'to ').

FIG. 4 shows plate cylinder units [only the plate cylinder (1) and the plate cylinder unit base plate (8) are shown] at four positions in the traveling direction of the tape (2). An example is shown in which the plate is bent and advances each time it passes through the cylinder unit, and a guide roll (6) is provided between the plate cylinder units to change the moving direction of the tape (2).

Reference numeral (7) is a dryer for drying the ink printed on the tape (2).

Next, the structure of the plate cylinder unit will be described in detail with reference to FIGS.

FIG. 5 shows the rolling state of the plate cylinder (1) which rolls on the tape (2) which is intermittently moved when the tape (2) is stationary. Device (1
0), the plate cylinder (1) is a stationary tape (2) on a tape receiving plate (8 ') made of an elastic material attached to the upper surface of the plate cylinder unit base plate (8). The inking roll device (10) rolls on the upper part, and the inking roll device (10) is configured in a gate shape, and an application roll (11) located above the plate cylinder (1) at a constant interval from the plate cylinder (1). The uppermost supply roll (13), whose shafts are supported at both ends by the inking roll holder (12), and the calling roll located below and in contact with the outer periphery of the supply roll (13). (14) and a kneading roll (15) consisting of a set of seven, which is between the calling roll (14) and the coating roll (11) and is in contact with the outer circumference.
In 1), the coating roll shafts (11 ') at both ends are engaged with the vertical groove (12') at the lower end of the inking roll holder (12).

One point on the axis of the supply roll (13) at the upper end of the inking roll holder (12) is attached to the plate cylinder unit plywood (8).
An inking roll arm (18) pivotally supported (17) on the upper end of a column (16) standing upright is rotatably pivotally supported (19), and this pivotal support (19) The point is such that the inking roll arm (18) can move substantially vertically by rotating around the pivot (17) point as shown by the imaginary line.

Now, the plate cylinder (1) rolls by 1/4 rotation and moves from the position (a) to the positions (b), (c), (d), (e) and (f), and then (g).
When the coating roll (11) moves to the position (1), the coating roll (11) follows the plate cylinder (1) while keeping the same relational position, and is supported by the inking roll holder (12).
3), calling roll (14), kneading roll (15)
In order to avoid complication at the positions ((b), (c), (d), (e), (f) and (g), only the lowermost roll of the kneading roll (15) is shown. ], The vertical split groove (12 ') of the inking roll holder (12) is the coating roll shaft (11').
Since the inking roll holder (12) is rotated around the shaft support (19) or (19 ') as the coating roll (11) moves, the inking roll ( 14) and the kneading roll (15) move and gradually approach the coating roll (11) from the plate cylinder positions (a) to (b) and (c), and the coating roll (11) at the (c) position. ), And from this plate cylinder position (c) to (d)
(E) Keeping contact up to the position, during which the kneading roll (1
The ink of 5) is transferred to the coating roll (11).

Subsequently, the kneading roll (15) is gradually changed as it moves from the plate cylinder position (e) to the positions (f) and (g).
Leave from.

Thus, as the inking roll holder (12) moves, the vertical groove (12 ') holds the coating roll shaft (11') and slides.

Further, at the plate cylinder position (d) when the inking roll device (10) is moved, the kneading roll (15) is the coating roll (11).
It will be lifted slightly upward by the shaft support (1
9) is pushed up to (19 '), and the inking roll arm (18) pivots slightly as shown by the phantom line.

The rolling plate cylinder (1) has an arc length of 1 /
A plate (3) having a circumference of less than 2 circles is attached, and the plate (3) is located on the left side of FIG.
Each time it rolls / 4 rotation in the direction of the arrow R, the position of the plate (3) changes by 90 °, and at the position (b), it moves to the top.
At the position (c), it is on the right side, and since the plate (3) does not contact the tape (2) during this time, printing is not performed, and the plate (3) is contacted by the coating roll (11) and ink is applied. .

Subsequently, the plate (3) moves to the lower part at the (d) position, makes one full rotation at the (e) position, is positioned on the same left side as the (a) position, and reaches the (e) position from the (c) position. The printing is performed by contacting the stopped tape (2) with the plate (3) between / 2 rotations.

The plate (3) does not touch the coating roll (11) during a 1/2 rotation from the plate cylinder position (c) where this printing is performed to reach (e), and the plate is placed on the lowest roll of the kneading roll (15). The ink is transferred from the kneading roll (15) to the coating roll (11) in contact with the coating roll (11).

Subsequently, the plate cylinder (1) rolls from the plate cylinder position (e) to the (f) position, the plate (3) is located at the upper side, and the plate (3) is on the right side at the (g) position. g) reaching position 1 /
No printing is performed during two revolutions, and the plate (3) is applied to the coating roll (1
The ink of the coating roll (11) is applied to the plate (3) in contact with 1).

When the plate cylinder (1) reaches the position (g) in this way, it rolls in the reverse direction indicated by the arrow Q (f) (e) (d) (c).
During the return path from the position (b) to the position (a), the coating roll (11) applies the ink to the plate (3) in an overlapping manner while the position (g) reaches the position (e). From position (c)
The second printing is performed while reaching the position, and at the same time, the coating roll (11) contacts the lowest roll of the kneading roll (15) to receive the ink, and then while reaching the position (a) from the position (c). Then, the coating roll (11) performs the reverse operation of the forward pass of applying the ink to the plate (3) to perform printing twice in one reciprocation.

Printing is performed continuously by such reciprocal rolling.

At this time, the tape (2) is printed while the plate cylinder (1) rolls from the forward path (c) position to the (e) position and during the backward path from the (e) position to the (c) position. Sometimes it ’s stopped,
While the printing is not being performed, the print rolls from the (e) position to the (g) position and then back to the (e) position in the reverse direction, and between the (c) position and the (a) position and then to the (c) position again. ) The tape (2) moves in the advancing direction indicated by the arrow by a predetermined one printing pitch while it is reversely moved back to the position.

Next, the rolling structure of the plate cylinder (1) is shown in the rear view of FIG. 6 and FIG.
It will be described with reference to FIG. 7 showing a II-II cross section.

On the upper and lower sides of the plate cylinder unit base plate (8), place two
Guide bars (20) (2
0 ') are supported by guide bar brackets (21) attached to the front and rear ends of the plate cylinder unit base plate (8) to provide a pair of left and right guide bars (20) (2).
0 ') is a slide bracket (2) that rotatably supports the shafts at both ends of the plate cylinder (1) and the coating roll (11).
2) (22 ') is provided slidably along the guide bars (20) (20').

The plate cylinder unit base plate (8) is attached to one end of the plate cylinder (1).
A pinion (24) that meshes with a rack (23) that is long in the front-rear direction and is mounted on the upper side is attached.

Further, the servo motor base (25) is attached to the outside of one plate cylinder bracket (22) so as not to interfere with the inking roll holder (12), and the coating roll shaft (11) is mounted on the servo motor base (25). ′) A servo motor (26) is attached so that its shaft center coincides with the output shaft of the servo motor (26), and a rolling race gear (27) meshing with the pinion (24) is coupled to the output shaft of the servo motor (26).
This rolling drive gear (27) is directly connected to the shaft of the rolling groove (1) of the inking roll holder (12).
2 ′) and slide bracket (22)
Is rotatably supported by the coating roll shaft (1
1 ') is rotatably supported.

Thus, when the servomotor (26) is driven, the rolling drive gear (27) rotates the pinion (24), and the pinion (24) rolls along the rack (23), so that the pinion (24) is rotated. ) And the plate cylinder (1) that is integrated with the plate roll in the front-back direction, and slide brackets (22) (22 ')
The coating roll (11) and the servomotor (20) supported by the same also move in the front-back direction.

When the coating roll (11) is moved in this manner, the inking roll holder (12) engaged with the coating roll shaft (11 ') is centered on the shaft support (19) or (19'), and the vertical split groove (12) is formed. ′) Rotates in the front-rear direction to the position shown by the phantom line in FIG. 6 while sliding with respect to the coating roll shaft (11 ′).

The servomotor (26) accurately controls the rolling distance and the forward / reverse rotation of the plate cylinder (1).

Next, the structure for adjusting the front-rear, left-right, and tilt directions of the plate cylinder unit is shown in FIG. 6 along the line II-II in FIG. 7 and II in FIG.
8 is a sectional view taken along line I-III, and FIG. 9 is a front view of FIG. 8, FIG. 10, FIG. 11, FIG. It will be described with reference to FIG.

On the back surface of the center of the plate cylinder unit base plate (8), the central shaft (3
0) is provided so as to hang down, and the central axis (30) is bored in the main body table (9). A rectangular window (31) having a size such that the central axis (30) can be moved back and forth and left and right.
Through which the plate cylinder unit base plate (8) is placed on the main body table (9).
The hole (33) provided in the center of the square piece (32) shown in FIG. 0 is fitted, and the square piece (32) is brought into contact with the back surface of the main body table (9), and the lower end portion of the central shaft (30). It is fixed by a lock handle female screw (34) screwed to the male screw formed on the.

Square hole (36) into which this square piece (32) is fitted with no gap in the front-rear direction and with a gap for adjusting the left-right direction in the left-right direction.
Front and rear adjustment plate (35) in the shape of a square frame shown in FIG.
However, the square piece (32) is fitted into the square hole (36) and brought into contact with the back surface of the main body table (9).
Hold both left and right sides of 5) by a pair of left and right slide guides (37) attached to the back surface of the main body table (9),
The front-back adjusting plate (35) is supported so as to be slidable in the front-back direction.

An adjustment female screw (38) penetrating in the front-rear direction is provided in the center of the front side (which is configured to be wider than the other three sides) of the front-rear adjusting plate (35). 38)
As shown in Figs. 8 and 9, the large bevel gear (4
The front-rear adjustment male screw (39) attached with (0) is screwed,
The front-rear adjusting male screw (39) is supported by a bearing (41) attached to the back surface of the main body table (9) and extends in the front-rear direction. The small bevel gear (42) meshes with the large bevel gear (40). ) Attached to the tip of the front-rear adjustment shaft (43)
Bearings (44) attached to the back of the body table (9)
Is extended in a direction orthogonal to the front-rear adjusting male screw (39), that is, in the left-right direction. A handle (45) is attached.

Further, as shown in FIG. 8, FIG. 12 and FIG. 13, projections (46) are respectively projected at the front and rear ends of the plate cylinder unit base plate (8) in the center in the left-right direction. )
A left-right elongated hole (47) is formed in the left-right direction, and a cylindrical left-right adjustment piece (48) is fitted into the long hole (47). The left-right adjustment piece (48) has a diameter near the upper end. A left and right adjusting female screw (49) penetrating in the direction is provided, and the lower half of the left and right adjusting female screw is fitted in a groove (50) formed in the front and rear direction at the center of the upper surface of the main body table (9) in the left and right direction. is doing.

The protrusion (46) is formed with a male threading hole (51) penetrating in the left-right direction through the center of the elongated hole (47) in the longitudinal direction, and the male threading hole (51) is adjusted left and right. The left and right adjusting male screw (52) is screwed into the left and right adjusting female screw (49) of the left and right adjusting piece (48) through the male screw (52).
Has a collar (53) that is in contact with the left and right ends of the protrusion (46) and is extended in the front direction so as to project outward from the main body table (9). 54) is attached.

In the figure, (55) shows an adjusting window formed on the front surface of the side plate (9 ') of the main body, and (56) shows a window lid for opening and closing the adjusting window.

The description of the configuration is completed above, and then the adjusting method in the front-back direction (XX-X '), the left-right direction (YY-Y'), and the inclination direction (ZZ-) shown in FIG. 3 will be described.

First, open the window cover (56) and open the lock handle female screw (3
4) Loosen a little.

To adjust the front-rear direction (XX), the front-rear adjustment handle (45) is rotated right or left to move the front-rear adjustment shaft (43), the small bevel gear (42) and the large bevel gear (40). After that, the longitudinal adjustment male screw (39) rotates and the longitudinal adjustment plate (3
Move 5) forward or backward.

The square piece (32) fitted in the square hole (36) of the front-back adjusting plate (35) is fitted in the square hole (36) without any gap in the front-rear direction. ) Moves in the front-rear direction together with the front-rear adjusting plate (35), the square piece (3
The central axis (30) inserted into the hole (33) of (2) moves in the front-back direction inside the rectangular window (31), so that the plate cylinder unit base plate (8) supporting the entire plate cylinder unit is formed. It can be moved in the front-back direction to achieve the front-back adjustment.

At this time, the left-right adjustment piece (48) fitted in the groove (50) on the upper surface of the main body table (9) moves in the front-rear direction along the groove (50), and thus does not hinder the front-rear adjustment.

To adjust the left-right direction (Y-Y '), rotate the two left-right adjustment handles (54) (54) attached to the front and rear ends of the plate cylinder unit base plate (8) simultaneously to the right or left. Then, the left and right adjusting male screws (52) (52) rotate, and the left and right adjusting male screws are fitted to the left and right adjusting pieces (48) (48) fitted in the grooves (50) (50) of the main body table (9). (5
2) (52) moves in the left-right direction, and the left-right adjusting male screws (52) (52) come off to the projections (46) (46) of the plate cylinder unit base plate (8) by the collar (53). Left and right adjusting male screw (52)
The plate cylinder unit base plate (8) is moved in the front-rear direction as (52) is moved in the front-rear direction.

That is, the left-right adjustment piece (48) which fits in the grooves (50) (50) of the main body table (9) and does not change the position in the left-right direction.
Since the long holes (47) and (47) move relative to (48), the horizontal adjustment of the plate cylinder unit can be achieved.

At this time, the central axis (3
0) is also capable of moving to the left and right in the void range of the rectangular window (31) in the left-right direction, and also has a square piece (32) fitted in the central axis (30) and moving in the front-rear direction together with the central axis (30). Since there is a gap in the left-right direction with respect to the square hole (36) of the front-back adjustment plate (35), it is possible to move by this gap.

In order to adjust the inclination direction (Z-Z '), the two left and right adjustment handles (54) (54) attached to the front and rear ends of the plate cylinder unit base plate (8) are simultaneously rotated in opposite directions. Then, one left and right adjusting male screw (52) acts in the direction of pulling the plate cylinder unit base plate (8), and the other left and right adjusting male screw (52) in the direction of pushing the plate cylinder unit base plate (8). Since it works, the plate cylinder unit base plate (8) is eventually tilted about the central axis (30) as shown by an imaginary line in FIG. 13, and the tilt can be adjusted.

When all the adjustments in the front-rear direction, the left-right direction, and the inclination direction are completed, the lock handle female screw (34) is tightened, and the plate cylinder unit base plate (8) together with the square piece (32) are attached to the main body table (9). Sandwich the main body table (9)
Will be fixed to, and normal printing can be performed.

In the conventional rotary label printing machine, as described above, the plate cylinder rotates at a fixed position and the tape is printed while moving in synchronization with the rotation of the plate cylinder. There is a plate cylinder rolling type in which the plate cylinder rolls and prints.The former plate cylinder rotary type has the biggest difficulty in the timing mismatch between the movement of the tape and the rotation of the plate cylinder, and the latter plate cylinder. In the rolling type, a plurality of plates for multicolor printing are attached in parallel to the plate cylinder, and the plate cylinder is rolled in a direction orthogonal to the tape traveling direction by 90 ° to perform multicolor printing. The inconsistency of the overlap of each color plate cannot be corrected by adjusting the position of the plate cylinder, and it was necessary to replace the plate on the plate cylinder.

This plate replacement must be done with the printing machine stopped, and it is necessary to replace the plates many and many times before they can be printed consistently. It is necessary to repeat the proof printing, and this work can be done only by a skilled technician, and it takes a lot of time and the waste of waste paper is great, but according to the present invention. For example, the plates for each color are attached to different plate cylinders, and since the position of each plate cylinder unit can be freely adjusted in the front, back, left, right, and diagonal directions, there is no need to replace the plates on the plate cylinder. It is possible to adjust the plate easily and quickly by adjusting the plate cylinder unit while continuing.

(Effects of the Invention) According to the label printing machine according to the present invention described above, plate matching, which is the greatest difficulty of label printing, does not require plate replacement at all, and printing is continued to check the printing status. However, by making it possible to adjust the position of the plate cylinder, it is possible to minimize the large amount of time and expense required for the conventional preparation work, greatly reduce the cost of preparation, and reduce the cost. It is possible to suppress an increase in the unit price of label printing of a lot, and to obtain an effect that an unskilled person can easily perform plate matching without requiring a skilled technician for plate matching.

[Brief description of drawings]

1 to 4 are schematic diagrams for explaining the concept of the present invention. FIG. 1 is a perspective view of a plate cylinder, and FIG. 2 is a diagram showing a state in which the plate cylinder rolls for printing. , FIG. 3 is a view showing the adjustment direction of the plate cylinder, and FIG. 4 is a view showing an arrangement example of the plate cylinder unit. 5 to 13 are views showing an embodiment of the plate cylinder unit of the present invention, FIG. 5 is a view showing the rolling state of the plate cylinder in detail together with an inking roll device, and FIG. 6 is a plate. FIG. 7 is a sectional view of the body unit seen from the rear, FIG. 7 is a sectional view taken along the line II-II in FIG. 6, FIG. 8 is a sectional view taken along the line III-III in FIG. 7, and FIG.
FIG. 10 is a perspective view of a square piece, FIG. 11 is a perspective view of a front-rear adjusting plate, FIG. 12 is a front view of a plate cylinder unit, and FIG. 13 is V-V of FIG. It is a top view of the plate cylinder unit base plate seen in the line direction. 1 ... Plate cylinder, 2 ... Tape, 3 ... Plate, 4 ... Pinion, 5 ... Rack, 6 ... Guide roll, 7 ... Dryer, 8 ... Plate cylinder unit base plate, 9 ... Main body table

Claims (1)

[Claims] 1. A plurality of sets of plate cylinder units are arranged along the printing tape, the plate cylinder units reciprocatingly rolling in the traveling direction of the printing tape and printing both when the printing target tape moving intermittently stands still. The barrel unit is configured to be movable and adjustable in a traveling direction of the printing tape, a direction orthogonal to the traveling direction, and a direction inclined to the direction orthogonal to the traveling direction on a plane parallel to the printing surface. A printing machine for labels, which is characterized in that