JPH054909B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing paper tainsion adjustment device in a continuous slip printing machine.

[Conventional technology]

Conventionally, continuous slips have been printed using high-speed foam rotary presses.

However, the above-mentioned form rotary presses are very large and require a lot of time to change and adjust printing patterns, and a large amount of waste paper is generated during these adjustments. Various types of simple printing machines have been developed for this purpose.

In general, these continuous slip printing machines print by intermittently feeding continuous slips fed between a blanket cylinder and an impression cylinder that rotate opposite each other. As disclosed in the above publication, a tractor and a suction conveyor arranged on the paper feed side and the paper discharge side of the impression cylinder a, or as shown in FIG. A method is known in which printing is performed by intermittently feeding the printing paper C using a pair of installed tractors b, b.

However, since the conventional printing press has a structure in which the impression cylinder a is attached to and detached from the blanket cylinder d (blanking cylinder d is turned ON and OFF), the impression cylinder a is detached from the blanket cylinder d (blanking cylinder d is turned OFF). In this state, the printing paper c "bulges".

In addition, since the impression cylinder a has a notch e, when the notch e is located on the blanket cylinder d side (upwards), the radius of the notch e becomes smaller than the radius of the impression cylinder a. , "piling" of the printing paper e occurs.

Therefore, if the machine is rotated with impression cylinder a in the OFF state, or with impression cylinder a or blanket cylinder d inserted and the notch e positioned on the blanket cylinder d side, printing paper c becomes prone to flapping, and the ink on the rubber cylinder d is transferred to the printing paper c, resulting in printing stains and the commercial value of the printed matter is lost.

Further, the "bulging" of the printing paper c has a negative effect on the registration (front registration) and oblique image of the image with respect to the printing paper c.

Therefore, as a solution to the above-mentioned "piling" of the printing paper, as shown in FIG. A method is known that uses force in the direction of gravity to remove curls in printing paper c.

[Problem that the invention seeks to solve]

However, according to the above-mentioned conventional method, when setting the printing paper c on the tractors b and b on both sides, the rollers f etc. get in the way, so it is necessary to lock them upward, which makes the operability very difficult. If the roller f etc. is too heavy or the roller f etc. comes into contact with the printing surface, the printing paper c will be damaged and the printing quality will be impaired.In addition, when printing on thin paper, if the roller f etc. is too heavy, the tractor pin will cause continuous slips to be broken. If the feed hole becomes large or if the rollers f etc. are too light, there are various problems such as insufficient curl prevention effect with thick printing paper.

As a result of studies in view of the above-mentioned conventional problems, the present invention has been developed in which a pair of tractors are arranged on the paper feed side and the paper discharge side of the impression cylinder, and between the impression cylinder and one of the tractors, the printing paper A lifter shaft with a lifter fixed downwards is rotatable, and a spring force is applied in a direction in which the tip of the lifter moves away from the back side of the printing paper. , the rotation of the lifter shaft is controlled in the cylinder loading OFF state, and the lifter imparts tainsion to the printing paper, and the rotation of the lifter shaft is controlled by a cam provided to rotate in conjunction with the rotation of the impression cylinder. However, only when the printing paper is located in the notch of the impression cylinder,
An object of the present invention is to provide a tainosis adjustment device for printing paper in a continuous slip printing machine, which is capable of applying tainosis to the printing paper using a lifter to remove the "bulkness" of the printing paper, and giving an appropriate tainage to paper ranging from thin paper to thick paper. The purpose is to.

[Means for solving problems]

That is, the present invention has a pair of tractors on the paper feed side and the paper discharge side of the impression cylinder, and is rotatably installed between the frames between the impression cylinder and one of the tractors and below the printing paper. A lifter shaft and the tip of the lifter are swung by a fulcrum pin in a direction away from the printing paper by a spring force biasing means that applies a rotational force to the lifter shaft, and an arm bracket pivotally connected to the frame. first arm means and second arm means pivotably connected to each other, the first arm means and the second arm means being engaged against a spring force of the spring force biasing means with a pin of an arm fixed to the lifter shaft; , of the impression cylinder loading mechanism.
The rotation of the lifter shaft is controlled via the second arm means in conjunction with ON and OFF, and the cylinder is inserted.
The first tainsion applying means applies tainsion to the printing paper by the lifter in the OFF state, the height difference of the cam that rotates in conjunction with the rotation of the impression cylinder, and the length of the high part of the cam in the circumferential direction. Controlling the rotation of the lifter shaft via the arm that swings in the trunk insertion ON state and the first arm means,
a second tensioning means for applying tension to the printing paper only when the printing paper is positioned in the notch of the impression cylinder; an adjustment screw attached to the frame so as to be able to adjust the amount of swing of the arm bracket; The above-mentioned problem was solved by arranging a tainsion force adjusting means for controlling the rotation of the lifter shaft through the tainshield force adjusting means to adjust the tainsion force of the printing paper.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. As shown in FIGS. 1 to 7, an impression cylinder 3
Tractors 1 and 1 installed on the paper feed side and the paper discharge side, respectively.
, a lifter shaft 10 to which a plate-shaped lifter 2 is fixed, a spring force biasing means B that biases a spring force in a direction in which the tip of the lifter 2 moves away from the back surface of the printing paper A, a first arm means C, and a second arm means D; a first tainsion applying means E; and a second arm means D;
It is composed of a tension biasing means F and a tension force adjusting means G.

The lifter shaft 10 is located below the printing paper A between the impression cylinder 3 and one of the tractors 1, and is rotatably installed on the frames 40 and 41, and the lifter 2 moves the printing paper A from below. It is designed to give a tainsion.

The spring force biasing means B includes a tension spring 15 tensioned between an arm 11 fixed to one end of the lifter shaft 10 and spring hooks 13 and 14 fixed to the frame 41, respectively. A rotational force is applied to the lifter shaft 10 in a counterclockwise direction in FIG. 1, so that the tip of the lifter 2 moves away from the back surface of the printing paper A.

The first arm means C includes an arm bracket 1 pivotally connected to the frame 41 by a stud 17.
6, a first arm 21 is pivotably attached to the arm 1 by a fulcrum pin 18, and the first arm 21 is attached to the arm 1.
1 fixed to the pin 12 and the spring force biasing means B
It is formed by being engaged against the spring force of.

On the other hand, the second arm means D includes the second arm 2
5 is the arm bracket 1 at the fulcrum pin 18.
6, the second arm 25 is pivotably connected to
The pin 12 of the arm 11 and the spring force biasing means B
It is formed by being engaged against the spring force caused by.

Further, the first tension applying means E is pivotally mounted to the frame 41 so as to be able to swing around the stud 37 as a fulcrum in conjunction with ON and OFF of the body insertion mechanism H of the impression cylinder 3, and is interlocked with the rotation of the impression cylinder 3. A cam lever 2 is swung by a cam 30 fixed to a cam shaft 23 rotatably mounted on frames 40 and 41.
8, and a link 27 whose one end is pivotally connected to the cam lever 28 by a pin 29, and whose other end is connected to the second arm 25 of the second arm means D by a pin 26. Cam follower 2
8' is in contact with the lower position of the body insertion cam 30 in the body insertion OFF state, the link 27 and the second arm means D
The arm 11 and the lifter shaft 10 are rotated in the clockwise direction in FIG.
It is formed so as to give tension to. Also, when the body insertion cam 30 rotates and the cam follower 28' comes into contact with the high part 30', the second arm means D
The lifter 2 swings in the opposite direction to the above, and the lifter 2 descends.
The printing paper A is formed so as not to be stained.

On the other hand, the second tension applying means F is pivotally connected to the frame 41 by a stud 20 so as to be swingable due to the height difference A of the cam 24 fixed to the cam shaft 23, and the cam follower 1 is pivotally supported at one end of the frame 41.
A long hole 19'' is provided at the other end of the arm 19 with 9' in contact with the cam 24, and a pin 22 fixed to the first arm 21 of the first arm means C is engaged with the long hole 19''. , the cam follower 19' comes into contact with the high part 24' of the cam 24, and the arm 19 swings counterclockwise in FIG. is rotated clockwise in the figure against the spring force, swings the lifter 2 to a predetermined position, imparts tainsion to the printing paper A, and also rotates the high part 24' of the cam 24 in the circumferential direction. Due to the length l, the printing paper A is formed to be stained only when the printing paper A is located in the notch 3' of the impression cylinder 3, and not to be stained at other positions.

The traction force adjustment means G includes a knob 33 rotatably supported at a fixed position on the frame 41.
Attach the adjustment screw 32 to the arm bracket 16.
By screwing into the screw hole 31' of a pin 31 fixed to the pin 31 and rotating the adjustment screw 32, the arm bracket 16 is swung from side to side about the stud 17. By arbitrarily rotating the arm 11 and lifter shaft 10 and changing the highest point of the lifter 2, the tension force on the printing paper A can be adjusted.

Further, the cylinder insertion cam 30 and the cam 24 are interlocked with the rotation of the impression cylinder 3 via an impression cylinder gear 34, idle gears 35, 35', and a gear 36 fixed to the camshaft 23.

Further, as the body inserting mechanism H of the impression cylinder 3, for example, the one disclosed in Japanese Utility Model Application Publication No. 50-26902 or other known mechanisms may be used. The cam lever 28 swings counterclockwise in FIG.
The cylinder insertion is turned on, and the cylinder insertion of impression cylinder 3 is turned on.
With lever 48, latch 49, solenoid 50
Continues to be ON, enters paper feeding state, and lifter 2
operates only when the printing paper A is located in the notch 3', and applies a taint.

In addition, the impression cylinder 3 includes arms 43, 53 and a frame 4.
Studs 44, 54 and screws 4 installed at 0, 41
5,55, block 46,56, nut 47,5
7 provides elasticity and support.

Next, paper feeding of the tractors 1, 1 will be explained. The timing pulley 61 rotates by the amount set by the servo motor 60, and the timing pulleys 62 and 63 are rotated via the timing belt 63.
The timing pulleys 62, 63 rotate spline shafts 64, 64 to which they are fixed, drive the tractors 1, 1, and connect pins (not shown) on the tractors 1, 1 to continuous slips, that is, feed holes (not shown) in the printing paper A. Paper feeding is performed by engagement of the two.

FIG. 5 shows the state of the blanket cylinder 4 and the impression cylinder 3 at the start of printing, where the solid line indicates the flow (position) of the printing paper A during printing.

FIG. 6 shows the state of the blanket cylinder 4 and impression cylinder 3 before printing starts, with the notch 3' facing upward.

In this state, the radius of the notch 3' is smaller than the radius of the impression cylinder 3, so the printing paper A
As shown by the solid line in the figure, a "bulge" occurs, so in order to solve this "bulk", the lifter 2 is moved upward in this state, and the printing paper A is given an appropriate tainsion as shown by the two-dot chain line in the figure. give.

FIG. 7 shows a state in which the impression cylinder 3 is detached from the blanket cylinder 4 in the cylinder insertion OFF state.

In this state, as in the case of Fig. 6, printing paper A
In order to eliminate this "bulk", the lifter 2 moves up when the impression cylinder 3 is inserted into the OFF position, and as shown by the two-dot chain line in the figure, lifter 2 lifts the printing paper A to an appropriate level. Give an impression. Incidentally, in FIG. 4, numeral 5 indicates a plate cylinder. In the above embodiment, the spring force biasing means B, the second tension applying means, and the tension force adjusting means are installed in the impression cylinder 3, but these means are installed in the blanket cylinder 4 (not shown). It can also be attached to a machine that inserts the body.

〔Effect of the invention〕

As explained above, since the printing paper tension adjustment device in the continuous slip printing machine according to the present invention is configured, in the continuous slip printing machine in which the impression cylinder 3 is attached to and detached from the blanket cylinder 4, the impression cylinder 3 can be turned off.
The "bulging" of the printing paper A under this condition, and the "bulging" that occurs at the notch 3' of the impression cylinder 3 when the cylinder loading is ON, including in continuous slip printing machines where the blanket cylinder 4 is attached and detached from the impression cylinder 3. It is possible to eliminate the curling of the printing paper A, thereby preventing stains and oblique images on the printing paper A caused by the curling of the printing paper A, and improving the registration accuracy of the image and the operability when setting the printing paper A. In addition, by placing the lifter 2 below the printing paper A, the printing surface will not be damaged.Furthermore, since the tain force against the printing paper A can be adjusted arbitrarily, the appropriate tainsion can be achieved from thin paper to thick paper. The effects are enormous.

[Brief explanation of the drawing]

Fig. 1 is a side view of the main part of a printing paper tainsion adjustment device in a continuous slip printing machine according to an embodiment of the present invention as seen from the non-operating side, and Fig. 2 is a side view of the main part of the same embodiment as seen from the operating side. 3 is a developed sectional view taken along the - line in FIGS. 1 and 2, FIG. 4 is a schematic side view of a printing press equipped with the same device, and FIGS. 5 and 6 are In the same embodiment, each side view shows the states of the blanket cylinder and the impression cylinder at the time of starting printing and before the start of printing, respectively, FIG. 1 is a schematic side view of a printing press equipped with a conventional printing paper staining device; FIG. 1, 1...tractor, 2...lifter, 3...
...impression cylinder, 3'...notch, 10...lifter shaft, 11...arm, 12...pin, 16...
Arm bracket, 18... Fulcrum pin, 21...
1st arm, 25...2nd arm, 24...cam, 24'...high part, 32...adjustment screw, 40,
41... Frame, A... Printing paper, B... Spring force biasing means, C... First arm means, D... Second
Arm means, E...first tainsion applying means,
F...Second tainsion applying means, G...Tinsion force adjusting means, H...Body inserting mechanism.

Claims (1)

[Claims] 1. A lifter shaft that has a pair of tractors on the paper feed side and the paper discharge side of the impression cylinder, and is rotatably installed between the frames between the impression cylinder and one of the tractors and below the printing paper; Spring force biasing means for biasing the lifter shaft with rotational force in a direction in which the tip of the lifter moves away from the printing paper;
A first arm and a second arm, each of which is pivotally connected to an arm bracket pivotally connected to the frame so as to be swingable by a fulcrum pin, resist the spring force exerted by the pin of the arm fixed to the lifter shaft and the spring force biasing means. The rotation of the lifter shaft is controlled via the second arm means in conjunction with the ON and OFF of the impression cylinder cylinder loading mechanism, and the cylinder loading mechanism is engaged with the first arm means and second arm means. A first intensification means applies intensification to the printing paper by the lifter in the OFF state, and a cylinder The rotation of the lifter shaft is controlled through the arm that swings in the insertion ON state and the first arm means, and a second tainsion is applied to the printing paper only when the printing paper is located in the notch of the impression cylinder. and a tensioning force adjusting means having an adjustment screw attached to the frame so as to be able to adjust the amount of swing of the arm bracket, and controlling the rotation of the lifter shaft via the arm bracket to adjust the tensioning force of the printing paper. A printing paper tainsion adjustment device in a continuous slip printing machine.