JPS595010Y2 - Paper gripping device for high-speed folding machine for rotary printing press - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper gripping device for a high-speed folding machine for a rotary printing press.

As shown in Fig. 1, in a conventional high-speed folding machine for a rotary printing press, when a printing paper 3 is inserted between a plunger side 1 and a jaw cylinder 2 which rotate at the same circumferential speed, a Needle 4 is printing paper 3
After the printing paper 3 is once fed to the plunging side 1 by pricking the tip thereof, the plunging blade 5 provided on the plunging side 1, the gripping plate 6 and the gripping fixing plate 7 provided on the gripping cylinder 2 When the contact position is reached, the tip of the plunger blade 5 inserts the printing paper 3 between the gripping plate 6 and the gripping fixing plate 7, and sends the overlapping two sheets of printing paper 3 to the gripping cylinder 2 side. is configured to provide

Further, in the conventional paper holding device on the side of the mouth cylinder 2, as shown in FIGS. 2 and 3, an operating cam 10 is fastened to a bearing 9 that rotatably supports a shaft 8 that drives the mouth cylinder 2. When the cam roller 12 provided at the other end of the cam roller lever 11 is brought into contact with the cam surface 10' formed on the outer circumferential surface of the operating cam 10 by a spring 14 provided at one end of the cam roller lever 11, the cam roller 12 is brought into contact with the cam surface 10' of the operating cam 10. It grips the cam roller lever 11 while sliding on the surface 10', rotates around the grip shaft 13 which is rotatably supported by the cylinder 2, and fixes the grip plate 6 fastened to the grip shaft 13 in its grip. It is configured to come into contact with and separate from the plate 7.

Note that 15 in the figure is a pin that fixes the cam roller lever 11 to the gripping shaft 13.

Reference numeral 16 is a spring rod, and the head is rotatably supported by the cam roller lever 11, and the shaft end is slidably inserted into the spring receiver 17 fixed to the end surface of the jaw barrel 2.
The spring 14 is inserted between the two.

As the speed of rotary printing presses has increased recently, the circumferential speed of the mouth cylinder 2 has increased, and when the cam roller 12 passes the maximum radius position of the cam surface 10' of the operating cam 10, the inertial force This causes a phenomenon in which the cam roller 12 once rotates in the opposite direction of the operating cam 10 due to the force of the spring 14, and then the cam roller 12 collides with the cam surface 10' of the operating cam 10 due to the force of the spring 14 as the inertia force decreases. Occur.

In this case, in the conventional paper holding device, as described above, the cam roller 12, the cam roller lever 11. Since the gripping shaft 13 and the gripping plate 6 are formed as one body, the cam surface 10 of the actuating cam 10 is damaged due to the collision between the cam roller 12 and the cam surface 10'.
Accidents have occurred in which the grip shaft 13 is worn out or the grip shaft 13 is damaged.

The present invention was devised in order to eliminate the above-mentioned drawbacks and construct a paper gripping device that corresponds to the speeding up of rotary printing presses. A cam roller lever is rotatably supported on a shaft and has a cam roller and a spring attached to its end, and a grip shaft lever is fixedly supported on the grip shaft and has a spring attached to its end. The swivel is provided so that there is a gap above the amount of rotational change of both levers due to changes in .

Embodiments will be explained below with reference to FIGS. 4 to 6, which show examples.

In the figure, reference numeral 18 denotes a cam roller lever, and the cam roller 13 rotatably supported at the other end by the force of a spring 12 provided at one end is always attached to the cam surface 10 of the operating cam 10.
' and is rotatably supported at the end of the gripping shaft 19 via a bearing 27.

Reference numeral 21 designates a gripping shaft lever, which is fixedly supported by a pin 22 on the gripping shaft 19 between the cam roller lever 18 and the gripping cylinder 2.

Reference numeral 23 is a spring rod, the head of which is rotatably supported by the end of the gripping shaft lever 21, and the shaft end is slidably inserted into a spring receiver 24 fixed to the end surface of the gripping barrel 2. A spring 25 is inserted between the head and the spring receiver 24, and the force of the spring brings the grip plate 6, which is fastened to the grip shaft 19, into contact with the grip fixing plate 7.

20.26 is cam roller lever 18, grip shaft lever 21
Due to the change in paper thickness, both levers 18.21
These are two stoppers fixed with a gap greater than the amount of rotational change.

With the above configuration, when the cam roller 13 is at the minimum position of the cam surface 10' of the operating cam 10, the cam roller 13, the cam roller lever 18, and the cam roller lever stopper 2
0 is located at the D1 position shown in FIG. The gripping shaft lever 21 and the gripping shaft lever stopper 26 are E1.
Located in position.

In this state, when the cam roller 13 moves toward the maximum radius position of the cam surface 10' of the operating cam 10 as the gripping cylinder 2 rotates, the cam roller 13 moves in the direction of arrow B and passes through the cam roller lever 18 to the cam roller lever stopper 20. moves in the direction of arrow C, and further moves in the direction of arrow C to position D2 while pushing the stopper 26 for the gripping shaft lever, so that the stopper 26 for gripping shaft lever moves from the E1 position to the E2 position, and the gripping shaft lever 21 Then, the grip plate 6 is separated from the fixing plate 7 via the grip shaft 19.

Next, when the cam roller 13 passes the maximum radius position of the cam surface 10' of the operating cam 10, the cam roller 13 further rotates in the direction of arrow B due to the inertial force caused by the rotation of the cam roller lever 18, and then as the inertial force decreases. Spring 1
The force of 2 causes the cam roller 13 to move against the cam surface 10 of the operating cam 10.
′.

At this time, since the cam roller lever 18 is rotatable about the gripping shaft 19, the moment of inertia generated in the cam roller lever 18 is smaller than that of the conventional lever shown in FIGS. 1 to 3.

Therefore, even if the cam roller 13 hits the cam surface 10' of the operating cam 10, wear on the cam surface 10' can be prevented, and since the transmission is not transmitted to the gripping shaft 19, damage to the gripping shaft 19 can be prevented. can.

Next, as the cam roller 13 slides toward the minimum radius position of the cam surface 10' of the operating cam 10, the cam roller 13
moves in the direction opposite to the arrow B, and the cam roller lever stopper 20 moves in the opposite direction to the arrow C via the cam roller lever 18 and is separated from the grip shaft lever stopper 26.

Therefore, the grip shaft lever 21 is rotated by the force of the spring 25, and moves the grip plate 6 toward the grip fixing plate 7 via the grip shaft 19.

Since the present invention is as described above, the cam roller lever 1
1 can eliminate the impact when the cam roller 13 hits the cam surface 10' of the operating cam 10, resulting in damage to the gripping shaft 19 and cam surface 10' of the operating cam 10. Since it is possible to prevent wear of the paper, it is possible to speed up the paper holding operation and improve printing efficiency.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a folding machine of a conventional rotary printing press, Fig. 2 is a side view showing the paper holding device of Fig. 1, Fig. 3 is a sectional front view, and Fig. 4 is a main paper holding device. FIG. 5 is a side view showing the device, FIG. 5 is a cross-sectional front view, and FIGS.

Claims (1)

[Scope of utility model registration request] In a paper gripping device of a high-speed folding machine for a rotary printing press, a gripping shaft is rotatably supported by a gripping cylinder and fastens a gripping plate. A cam roller lever equipped with a spring and a gripping shaft lever fixed to the gripping shaft and having a spring attached to the end are provided, and these levers are provided with a gap greater than the amount of rotational change of both levers due to changes in paper thickness. A paper holding device for a high-speed folding machine for a rotary printing press, characterized in that a stopper is provided as shown in FIG.