JPS6030254Y2 - Printing machine paper feed device - Google Patents

Description

[Detailed description of the invention] This invention uses the rotation of an eccentric pipe to shift the base of the carrier lever rearward at the end of the rearward rotation of the carrier lever, thereby adjusting the speed of the upper claw of the carrier lever at the time of paper removal. The present invention relates to a paper feeding device for a printing press that can guide a printing material to a forward register by making its inertia almost zero.

Next, this invention will be explained in detail with reference to drawings showing one embodiment thereof.

In the drawing, 1 is a main frame provided vertically, 2 is an auxiliary frame provided to the left of the main frame 1 and parallel to and integral with the main frame 1, and 3 is rotatably supported by both frames 1 and 2. A drive shaft 4 has a connecting body 5 attached to one end of the drive shaft 3.
It is a driving gear fixed coaxially through the driving part (
(not shown) is transmitted to the drive shaft 3 via the drive gear 4 and the coupling body 5.

6 is a sinking cam fixed to the right side of the drive gear 4; 8 is a vacuum pump whose base 8a is rotatably supported on the main frame 1; the tip of its piston shaft 9 is fixed to the end of the drive shaft 3; The piston shaft 9 reciprocates as the drive shaft 3 rotates.

Reference numeral 11 denotes a lever whose base portion 11a is supported by the main frame 1 and is always biased in the clockwise rotation direction. As the lever 11 rotates, the lever 11 swings around the base 11a.

13 is an eccentric pipe that is rotatably supported by both frames 1 and 2 and has an eccentric axis, 14 is an operating shaft that is rotatably supported on the axis of the eccentric pipe 13, and 15 is at one end of the operating shaft 14. It is a fixed rocking body, and the tip of the rocking body 15 and the tip of the lever 11 are connected by a connecting rod 16, and the rocking body 15 swings as the lever 11 swings due to the rotation of the sinking cam 6, and the operating shaft 14 rotates.

Reference numeral 17 indicates an eccentric shaft that is eccentric from the operating shaft 14 and is integrally provided at the other end of the operating shaft 14 via an eccentric 18 such as an eccentric cam. Reference numeral 19 indicates a paper feeder whose base 19a is rotatably supported by the eccentric shaft 17. 20 is a crank fixed to the other end of the drive shaft 3; 21 is a drive rod whose one end is rotatably supported by the shaft 19c of the drive portion 19b in the middle of the carrier lever 19; The other end is crank 2
The carrier lever 19 is attached to a pin 20' of 0, and the rotation of the drive shaft 3 causes the carrier lever 19 to reciprocate via the crank 20, pin 20', and drive rod 21.

Reference numeral 22 denotes a gripping portion for the printing material provided at the upper part of the carrier lever 19, which consists of a claw stand 23 and a rotatable claw 24 that holds the printing material between the upper surface of the claw stand 23;
The printing material held by the gripping part 22 is moved to the carrier lever 1.
By the rotation of 9, the paper is guided backward on the paper feed guide plate 25.

26 is a cam that is pivotally attached to the drive shaft 3 between both frames 1 and 2; 27 is a Watsupa fixed to the outer periphery of the eccentric pipe 13 between both frames 1 and 2; 28 is a pin 27a whose base is outside the Watsupa 27; A rod 30 is rotatably supported by a pin 31 at the base of the fork 29 and a roller 32 whose circumferential surface abuts the circumferential surface of the cam 26; is a spring device which is connected to the outer pin 27b of the Watsupa 27 on the opposite side to the pin 27a, and biases the rod 28 upwardly via the Watsupa 27 by the urging force of the spring 33; 30 is always in contact with the circumferential surface of the cam 26 , and the rotation of the cam 26 in conjunction with the rotation of the drive shaft 3 causes the rod 28 to move up and down, and the eccentric pipe 13 to swing via the swing pin 27 .

34 is fixed to the drive shaft 3 and the rod 28 is connected between the cam 26 and the cam 26.
This is a presser foot that holds the two prongs 29 of.

Next, the operation of the embodiment will be explained.

When the rotational force from the driving part is transmitted to the drive shaft 3 via the drive gear 4, the carrier lever 19 is rotated by the rotation of the crank 20, and the pin 20' and the drive shaft 3 are rotated.

A reciprocating rotational movement about the eccentric shaft 17 is started via the rod 21.

On the other hand, the sinking cam 6 is rotated with the rotation of the drive shaft 3,
By constantly contacting the roller 12 with the circumferential surface of the sinking cam 6, the lever 11 reciprocates around the base 11a, and the operating shaft 14 reciprocates and rotates via the connecting rod 16 and the rocking body 15. Furthermore, the rotational movement of the operating shaft 14 is eccentrically transmitted to the eccentric shaft 17 via the eccentric 18, so that the base 19a of the carrier lever 19 is reciprocated about the operating shaft 14.

In addition, the cam 26 rotates with the rotation of the drive shaft 3, and the rollers 30 of the rod 28 come into contact with the circumferential surface of the cam 26, so that the eccentric pipe 1
3 is rotated back and forth.

At this time, when the carrier lever 19 rotates around the eccentric shaft 17 and its grip portion 22 reaches the rearmost position,
As the eccentric pipe 13 rotates, the operating shaft 14 is located at the rearmost position, and as the operating shaft 14 rotates, the eccentric shaft 17 is located at the rearmost lower position, and the carrier lever 19
The carrier lever 19 is adjusted so that the base reaches the rearmost lower position and the carrier lever 19 is fully sunk.

Then, a paper feed tray (not shown) is installed by a sucker (not shown).
The upper printing material is passed one by one to the gripping part 22 of the carrier lever 19, and with the end of the printing material being held between the gripping pawl 24 and the pawl rest 23, the carrier lever 1 is moved.
As the sheet 9 rotates, it runs on the paper feed guide plate 25 and is carried to the forward register position.

As the carrier lever 19 approaches the forward position, the rotation of the drive shaft 3 causes the crank 20 and the drive rod 21 to extend in a straight line, so the carrier lever 19 gradually slows down. 13 rotates, and the operating shaft 1
4 is moving backwards.

In other words, as the carrier lever 19 rotates, its grip portion 22 continues to move backward while slowing down. However, as the operating shaft 14 shifts backward, the eccentric shaft 17 shifts backward. shaft 19b
A forward rotational force is applied to the grip portion 22 of the carrier lever 19 around the shaft 19.C, and the moving speed of the grip portion 22 of the carrier lever 19 decreases extremely as it approaches the forward position. It becomes almost zero.

That is, in the forward position of the carrier lever 19,
The axis of the eccentric shaft 17, which was at point A shown in FIG. 4, is located at the lowest rear point B at the end of rotation of the carrier lever 19.

The substrate is then released at this position and passed to the front register.

Thereafter, the grip portion 22 of the carrier lever 19 is positioned below the paper feed guide plate 25 due to the sinking of the eccentric shaft 17, and is then rotated forward due to the rotation of the drive shaft 3.

Furthermore, when the carrier lever 19 rotates forward about the eccentric shaft 17 and the grip portion 22 is positioned on the upper surface of the paper feed guide plate 25 due to the lifting of the eccentric shaft 17,
This time, the rotation of the eccentric pipe 13 causes the operating shaft 14 to shift forward, and a rearward rotational force about the shaft 19c acts on the carrier lever 19.

In other words, by applying a backward rotational force to the carrier lever 19 that rotates forward, the forward movement speed of the grip part 22 decreases, and the movement speed reaches zero just before the grip part 22 reaches the sucker. becomes close to.

On the other hand, in the past, since the operating shaft 14 was directly supported on the plane frame 1.2, the crank 2 due to the rotation of the drive shaft 3
Due to the rotation of 0, the gripping part 22 of the carrier lever 19 releases the printing material from the movable gripping part 22 at the 0 point, which is just before the front register position, as shown by the broken line in FIG. It abuts and is guided by the front register due to inertia.

According to this method, the timing of the printing material to be printed differs depending on the paper thickness of the material to be printed, so there is a drawback that the printing material may be unevenly distributed.

However, according to the embodiment, since the operating shaft 14 is supported by both frames 1 and 2 via the eccentric pipe 13, the stroke of the grip portion 22 becomes as shown by the solid line in the figure, and as described above, the stroke of the grip portion 22 becomes as shown by the solid line in the figure. As part 22 approaches maeken,
Since the speed approaches zero and the printing material is released at the 0 point immediately before the front register, the inertia of the printing material can be made zero and the printing material can be guided to the front register, and the printing material can be reliably guided to the front register. There will be no misalignment of the balance.

Furthermore, as the carrier lever 19 rotates forward and the gripping portion 22 approaches the sucker, the speed of the gripping portion 22 can be brought closer to zero. Paper delivery can be realized, and there is no possibility of incorrect paper feeding.

As mentioned above, according to the paper feeding device of the printing press of this invention,
a drive shaft rotatably supported by a frame of a printing press and transmitting rotational force from a driving unit; and an eccentric pipe rotatably supported by the frame and rotated by rotation of the drive shaft and having an eccentric shaft center. , an operating shaft rotatably supported on the axis of the eccentric pipe and reciprocally rotated by rotation of the drive shaft; an eccentric shaft provided at the end of the operating shaft via an eccentric; and a base. a carrier lever for paper feeding that is rotatably supported by the eccentric shaft and has a gripping portion for printing material on its upper part; and a carrier lever that is provided between an end of the drive shaft and the middle of the carrier lever comprises a crank, a pin, and a driving rod that reciprocates the carrier lever by rotation of the handle member, and when the grip portion reaches the rearmost position, the actuating shaft is positioned at the rearmost position, and the eccentric shaft is positioned at the rearmost downward position. By locating the base of the carrier lever at the rearmost and lower position,
When the paper on the upper claw of the carrier lever is removed, the operating shaft is at the rearmost position, the eccentric shaft is at the rearmost position, and the carrier lever is at its lowest position, so the speed of the carrier lever is reduced to almost zero. The material to be printed can be guided in the front register with its inertia almost zero, and the material to be printed can be reliably fed in the front register without causing misalignment of the front register.

[Brief explanation of drawings]

The drawing shows one embodiment of the paper feeding device of the printing press of this invention,
Figure 1 is a cutaway front view, Figure 2 is a partial right side view, Figure 3 is a cutaway right side view of the main part, Figure 4 is a left side view of the carrier lever, Figure 5 is the rotation angle of the crank. FIG. 4 is a relationship diagram between the stroke of the upper grip portion of the carrier lever and the stroke of the upper grip portion of the carrier lever. 1... Main frame, 2... Auxiliary frame, 3... Drive shaft, 13... Eccentric pipe, 14... Operating shaft, 19...Carrier lever, 20...Crank.

Claims (1)

[Scope of utility model registration request] A drive shaft that is rotatably supported by a frame of a printing press and transmits rotational force from a driving unit, and an eccentric pipe that is rotatably supported by the frame and rotates back and forth with the rotation of the drive shaft, and whose axis center is eccentric. an operating shaft rotatably supported on the axis of the eccentric pipe and reciprocally rotated by rotation of the drive shaft; an eccentric shaft provided at an end of the operating shaft via an eccentric; and a base. is rotatably supported on the eccentric shaft and has a gripping portion for printing material on the upper part thereof, and a paper feed carrier lever is provided between the end of the drive shaft and the middle of the carrier lever, and the The carrier lever is provided with a crank, a pin, and a driving rod that reciprocates and rotates the carrier lever by rotation of a shaft, and when the grip portion reaches the rearmost position, the operating shaft is positioned at the rearmost position, and the eccentric shaft is positioned at the rearmost position. A paper feeding device for a printing press, wherein the carrier lever is located at a lower position, and the base of the carrier lever is located at the rearmost lower position.