JPS5848128Y2 - number printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a number printing machine that successively prints a series of numbers on printing paper using a number device attached to a plate cylinder.

A rotary number printing machine is used to continuously print a series of numbers on printing paper, such as a sheet of paper.

FIG. 1 is a side view showing the main parts of a conventional number printing machine. The plate cylinder 1, the impression cylinder 2, and the paper transfer cylinder 3 are rotating in the direction shown by the arrow in the figure, and the printing paper passes through the swing 4. After the paper is fed and a number is printed between the numberer 5 on the plate cylinder 1 and the impression cylinder 2,
The paper is discharged via the paper transfer cylinder 3.

One or more numberers 5 for printing this number are installed in the axial direction of the plate cylinder 1, and one or more in the circumferential direction, and come into contact with the plate cylinder 1 as it rotates. Ink is applied to the printing surface by the application roller 6, and printing is performed when the printing surface passes through the impression cylinder 2.

The number device 5 is provided with a so-called digit feeding device that feeds the numbers on the printing wheel one by one for each rotation of the plate cylinder.

Reference numeral 7 designates a digit feeding cam that performs this digit feeding, and is rotatably attached to a support shaft 8 provided apart from the plate cylinder 1, and rotates the lever 5a of the numberer 5 in the digit feeding direction. It has a cam 7a that returns the lever 5a to its original position, and a cam 7b that returns the lever 5a to its original position.

The plate cylinder 1 is also provided with a plate cylinder attachment/detachment cam 9 that separates the plate cylinder 1 from the impression cylinder 2 during non-printing. 1 moves to the position shown by the chain line in the figure.

In the conventional apparatus configured as described above, if the plate cylinder 1 rotates and the numbering machine 5 is shifted during non-printing, a different number will be printed on the next printing paper. The digit feed cam 7 must be rotated to the position shown by the chain line in the figure to prevent the digits of the number 5 from being moved.

In addition, if plate cylinder 1 and impression cylinder 2 are pressed together during non-printing, printing will be done on the surface of impression cylinder 2 and will stain the back side of the next printing paper. It has to be done away from 6.

When a plurality of numberers 5 are installed in the circumferential direction of the plate cylinder 1, that is, when multiple numbers are printed on one sheet of printing paper, the digits of the plurality of numberers are printed. It is necessary to perform an escape operation of the plate cylinder 1, such as stopping the shift, at a short timing after printing one sheet of paper is completed.

Also, the operating distance required for plate cylinder 1 to escape is between plate cylinder 1 and impression cylinder 2.
Although it is determined by the mutual position of the roller 6 and the roller 6, it becomes considerably large by widening the range of paper thickness that can be printed from thin paper to thick paper.

However, in the conventional device, the support shaft 8 of the digit feed cam 7 is a separate shaft located away from the plate cylinder 1, so that the numbering machine can be moved by stopping the digit feeding and escaping movement of the plate cylinder 1 during non-printing. 5 and the shift cam 7 change in a complicated manner.

Therefore, in order to prevent the digit feed cam 7 from damaging the lever 5a of the numberer 5 both during printing and non-printing, the shapes of the cams 7a and 7b of the digit feed cam 7 must be complicated. I had to.

In addition, when adjusting the eccentricity of the plate cylinder 1 in response to changes in paper thickness, the relative position between the numberer 5 and the digit feed cam 7 changes as well, so digit feed can be performed reliably for any paper thickness. As in the above case, the shape of the cam becomes complicated in order to do so.

If the shape of the shifting cam 7 becomes complicated in this way, smooth shifting cannot be performed, which is an obstacle to increasing the speed.

In addition, if the angle of the shift cam 7 is increased to compensate for the drawbacks caused by the complexity of the cam shape, the effective surface of the plate cylinder 1 will be taken up by the amount of the enlarged shift cam.
It was necessary to reduce the number of number devices 5 installed on the machine.

Furthermore, the axis of the plate cylinder 1 moves due to the release operation, but
The movement of this axis is not a linear movement but a semicircular arc movement as shown by arrow A in the figure.

Due to the relationship between the shift cam 7 and the numberer 5, this semicircular arc movement must be in the direction in which the plate cylinder 1 approaches the forming roller 6. A special mechanism was provided to separate the forming roller 6 from the plate cylinder 1, since the number plate would be damaged if it was forcefully pressed onto the plate cylinder 1.

The present invention was developed in view of these points. By providing an auxiliary frame inside the main frame of the machine and providing the digit feed cam and its operating mechanism on this auxiliary frame, the shape of the digit feed cam is simplified. To provide a number printing machine which has a small angle and eliminates the need for a detachment mechanism for an ink forming roller, thereby increasing the speed of machine operation.

The configuration and the like will be explained in detail below with reference to embodiments shown in the drawings.

Figures 2 to 4 show a number printing machine according to the present invention,
Figure 2 is an overall side view of a one-color side number printing machine as an example, Figure 3 is a side view of the plate cylinder and the vicinity of the feeder, and Figure 4 is a vertical cross-sectional view developed to show the relationship between each part. be.

In the figure, printing paper 11 is fed by a paper feeding device 12 through a swing 13 between a plate cylinder 14 and an impression cylinder 15, and after a number is printed on it, it passes through a paper transfer cylinder 16 and is ejected by a paper discharging device 17. It is papered.

The ink for printing is sent from the ink reservoir 18 through a group of kneading rollers 19, and this ink is sent to a plurality of numberers 21 arranged in the axial direction and circumferential direction of the plate cylinder 14.
It is attached by the attaching roller 20.

In the main frame 22 on both sides of the number printing machine, which is roughly configured as described above, an eccentric bearing 23 having an eccentric part that is eccentric to the axis and a concentric part that is concentric with the axis is rotatable around its eccentric outer periphery. It is pivoted on.

A generally rectangular auxiliary frame 24 is loosely mounted on the concentric outer peripheral portion of the eccentric bearing 23, and supports the plate cylinder 14 rotatably.

The auxiliary frame 24 has a rectangular notch 25 approximately on an extension line connecting the two forming rollers 20 and the axis of the plate cylinder 14.
This notch 25 is engaged with a guide pin 26 implanted in the main frame 22 to restrict rotation of the auxiliary frame 24.

27 is a plate cylinder attachment/detachment cam pivotally attached to the eccentric bearing 23;
By rotating the eccentric bearing 23, the axis of the plate cylinder 14 moves in a semicircular arc between C1 and C2 as shown by arrow B in the figure.

Further, a plurality of shift cams 29 are fixed to a cam shaft 28 rotatably supported by the auxiliary frames 24 on both sides.

This shift cam 29 faces each of the rows of numberers 21 arranged in the axial direction of the plate cylinder 14, and has a lever 21a of the numberer 21 on its side. A feed cam 29a for feeding the digit of the device 21 and a set cam 29b for returning the lever 21a to its original position by similarly engaging with the roller 21b are successively provided.

The numberer 21 rotates together with the plate cylinder 14 in the direction shown by the arrow in the figure, and during printing, both of the two shift cams 29 a
, 29 b, and the forming roller 20 and the impression cylinder 1
Rotates while facing 5.

Further, an actuating cam lever 30 rotatably mounted on a cam shaft 28 inside the auxiliary frame 24 on one side has a roller 31 at its tip against an outer circumferential cam surface of an actuating cam 32 fixed on the plate cylinder 14. They are in contact with each other, and the tension arm 33 applies a rotational force toward the actuating cam 32 side.

The battledore 34 coaxially mounted with the roller 31 is generally shaped like a battledore, and has notches 34 on both sides of its tip.
A is provided.

On the other hand, a lever 35 is fixed on the camshaft 28 between the auxiliary frame 24 and the operating cam lever 30, and a link 36 is pivotally attached to the tip of the lever 35.

Reference numeral 37 denotes a lower lever rotatably mounted on a pin 38 implanted in the upper end of the auxiliary frame 24, and the tip of the link 36 is pivotally attached to the tip of the branched portion of the lower lever.

Further, pins 39 installed at both ends of the lower lever 37 are connected by a connecting plate 40, and when the battledore board 34 rotates, the pins 39 are inserted into the notches 34a on both sides of the battledore board 34.
are positioned so as to engage with each other.

Reference numeral 41 denotes a compression coil spring, which is attached to a rod 42 that is pivotally attached to the tip of the pin 39. When the pin 38 is on the extension of the axis of the rod 42, that is, at a position other than the dead center, the lower lever 37 It energizes rotational force.

A stopper 43 is provided to restrict the clockwise and counterclockwise rotations of the lower lever 37, and these compression coil springs 41. The stopper 43 and the like constitute a click mechanism.

On the other hand, an L-shaped bar 45 is pivotally attached to a lever shaft 44 installed on the auxiliary frame 24 near the deposition roller 20, and this L-shaped bar 45 is attached to the auxiliary frame It is rotated clockwise by the operation of a solenoid 46 mounted on the solenoid 24, and rotated counterclockwise by a tension spring 47 when the solenoid 46 is not operated.

In addition, a switching rod 48 is pivotally connected to the other end of the L-shaped bar 45.
are inserted into a seat 49 provided at the center of the battledore 34, and compression coil springs 50 are mounted on switching rods on both sides of the seat 49, respectively.

When the L-shaped bar 45 is rotated, one of the compression coil springs 50 is compressed and the other is released.

Therefore, the battledore 34 is elastically repelled by the compression coil spring 50 on the compressed side and rotates following the bar 45 in an L-shape.

The operation of the number printing machine configured as above will be explained.

Figure 3 shows the state during printing, and shows the axis C of the plate cylinder 14.
1 position, and the number plate 21 on the plate cylinder 14 is in the position of the forming roller 2.
0 and the impression cylinder 15.

Also, since the solenoid 46 is not operating, the battledore 34
is rotated counterclockwise under tension by a tension spring 47, and the notch 34a on the left side thereof engages with the pin 39.

Further, in the battledore 34, the roller 31 is pushed up by the large diameter portion of the operating cam 32, thereby rotating the lower lever 37 in the clockwise direction, so that the shift cam 29 is in the shift state.

Even if the operating cam 32 rotates together with the plate cylinder 14, the lower lever 37 does not rotate because it is locked by the click mechanism.

Then, when it comes to non-printing time and the solenoid 46 is activated,
The L-shaped lever 45 rotates clockwise against the tensile force of the tension spring 47, and the switching rod 48 and the compression coil spring 5
0 to rotate the battledore 34 clockwise.

After the notch 34a on the right side of the battledore 34 engages with the pin 39, the operating cam 3 rotating together with the plate cylinder 14
The large diameter portion 2 pushes up the roller 31 and rotates the lower lever 37 counterclockwise.

Therefore, the shift cam 29 rotates counterclockwise to enter a false feed state, that is, a state in which the roller 21b of the number machine 21 passes outside the set cam 29b of the shift cam 29.

In this case, even if the actuating cam 32 rotates, the lower lever 37 and therefore the shift cam 29 are prevented from rotating by the click mechanism, as in the previous case.

On the other hand, when the eccentric bearing 23 is rotated by the plate cylinder attachment/detachment cam 27 in order to perform an escape operation of the plate cylinder 14, that is, the number plate 21 attached thereto, at the same time as this shift stop operation, the plate cylinder 14 is moved by the eccentric movement. The axis moves in a semi-circular motion as shown by arrow B to position 02, and the number plate 21 is separated from the forming roller 20 and the impression cylinder 15.

In addition, the auxiliary frame 24 also has a notch 25 and a guide pin 26.
It moves approximately in the C, -C, direction by engagement with the C and -C directions.

In this case, the relative position between the cam shaft 28, which is the center of rotation of the shift cam 29, and the axis of the plate cylinder 14 does not change at all times.

Further, the same operation is performed when only the escape operation of the plate cylinder 14 is performed when changing the paper thickness, and when only the shift stop operation is performed when printing is started.

As is clear from the above explanation, according to the present invention, in a number printing machine, an auxiliary frame is provided inside the frame, and this is loosely mounted on the bearing of the plate cylinder, and the shift cam is pivoted on the auxiliary frame. When not printing or when changing paper thickness, the auxiliary frame moves simultaneously with the eccentric movement of the printing plate, and the relative position between the number dial and the digit feed cam spindle does not change, so the shape of the digit feed cam is There is no need to consider the eccentric movement of the plate cylinder, and the shape is extremely simple.

Therefore, the rotation of the machine base can be made faster than in the past, and the cam angle can be reduced to increase the number of number devices.

At the same time, by mounting the auxiliary frame loosely on the plate cylinder and guiding it with a guide pin, the number plate moves in the direction away from the form roller, so there is no need to provide a form roller attachment/detachment mechanism, and the structure is simplified. It becomes extremely easy.

[Brief Description of the Drawings] Fig. 1 is a side view showing the main parts of a conventional number printing machine, Figs. 2 to 4 show a number printing machine according to the present invention, and Fig. 2 shows an example of the number printing machine. FIG. 3 is a side view of the single color side number printing machine, FIG. 3 is a side view of the plate cylinder and the vicinity of the shift device, and FIG. 4 is a longitudinal cross-sectional view developed to show the relationship of each part. 14...Print cylinder, 20...Dressing roller, 2
1...Number, 22...Main frame,
23...Eccentric bearing, 24...Auxiliary frame, 26...Guide pin, 29...
Digit feed cam.

Claims (1)

[Scope of utility model registration request] There is an eccentric bearing whose eccentric outer periphery is rotatably supported by the main frames on both sides of the machine, and which rotatably supports the plate cylinder, and which is fitted into the concentric outer periphery of the eccentric bearing and whose rotation is controlled by a guide pin. an auxiliary frame that is regulated and moves in a direction away from the forming roller due to the rotation of the eccentric bearing; and a digit feeder whose one end is pivotally connected to the auxiliary frame and engages with the number dial on the plate cylinder to perform digit feeding. A cam and a digit-feeding cam switching mechanism equipped with a click mechanism that precisely switches the digit-feeding cam to both the digit-feeding and check-digit-feeding positions of the number machine and restricts free movement in both of these positions. and number printing machine.