JPS632317Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slitter device used in a folding machine of a rotary printing press.

The typical configuration of the folding machine used in conventional rotary printing presses is as shown in Figures 1 and 3.
FIG. 1 is a plan view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a front view thereof. As shown in the figure, a running paper 1 printed by a printing unit (not shown) passes through a guide roller 2 and is cut into three ribbons 1a, 1b, and 1c of equal width by a slitter roller 3 in the length direction. Thereafter, each ribbon 1a, 1b, 1c is separated in its advancing direction by a drag roller 4, reversed by 90 degrees by a tamper 5, sent to a folding cylinder 7 through each feed roller 6, cut and folded, and placed on a discharge tape 8. is discharged. The conventional slitter device including the slitter roller 3 used in the above-mentioned folding machine is as shown in FIGS. 4 and 5. FIG. 5 shows the state when the running paper is not cut, and FIG. 5 is a plan view thereof. In the figure, the slitter roller 3
is rotatably supported at both ends by the frame 9 of the rotary printing press main body, and is connected to a drive device (not shown) at one end. Further, the slitter roller 3 has three small diameter portions 3a formed at equal intervals on one part of its outer circumferential surface, and each of the small diameter portions 3a has three small diameter portions 3a formed thereon at equal intervals.
A ring-shaped slitter lower blade 10 made of cutter steel having a width narrower than that is fixed, and a cutting groove 11 is formed adjacent to this slitter lower blade 10 at a position where the running paper 1 is to be cut. 12 is the shaft,
Both ends are fixed to the frame 9 parallel to the slitter roller 3, and three levers 13 arranged at equal intervals are fastened by bolts 14 at the lower ends. Reference numeral 15 denotes three sets of two arms, each of which is rotatably supported by the shaft 12 so as to insert both ends of each of the three levers 13, and a pin 16 is provided between the lower end of each arm. A slitter upper blade 18 and two rubber rollers 19 are rotatably supported on both sides of the slitter upper blade 18 via a bearing 17.

Note that the slitter upper blade 18 has the cutting groove 11
The two rubber rollers 19 are formed so as to press the outer peripheral surfaces of the slitter lower blade 10 and the slitter roller 3, respectively, when cutting the running paper 1. Reference numeral 20 is an air cylinder whose end is rotatably supported between the upper end of the arm 15, and the end of a piston rod 21 sliding inside is connected to the end of the lever 13. With the above configuration, when the slitter roller 3 rotates, the running paper 1 is fed along its outer peripheral surface in the direction of the arrow. In this state, when the air is discharged from the air cylinder 20 and the piston rod 21 is moved into the air cylinder 20, the tip of each arm 15 rotates upward around the shaft 12, as shown in FIG. 4b. Then, the tips of the slitter upper blade 18 and the rubber roller 19 are moved away from the slitter roller 3 to be in a non-cutting state.

Furthermore, when air is supplied into the air cylinder 20 and the piston rod 21 is inserted from the air cylinder 20, the tip of each arm 15 rotates downward around the shaft 12, as shown in FIG. The tip of the slitter 19 presses the running paper 1 against the outer peripheral surfaces of the slitter lower blade 10 and the slitter roller 3, respectively, and at the same time, the tip of the slitter upper blade 18 inserts into the cutting groove 11 and cuts the running paper 1.

However, in the above configuration, when the tip of the slitter upper blade 18 cuts the running paper 1, the tip of the slitter upper blade 18 is spaced apart from both wall surfaces of the cutting groove 11, so the slitter upper blade 18 cuts the running paper 1. 1
Cutting at a crooked angle may result in a decrease in cutting accuracy.

Further, the upper blade 18 of the slitter "peels" the running paper 1, and the cut surface becomes jagged and fluffy. Therefore, the ribbons 1a, 1b, 1
By the time c is introduced into the folding drum 7, the ribbons 1a, 1
The jagged portions of the cut surfaces b and 1c cause paper to break.

The present invention solves the above-mentioned problems and provides a slitter device for a folding machine of a rotary printing press that improves sharpness and cutting accuracy when cutting paper with the upper blade of the slitter. .

6 and 7 showing embodiments of the present invention will be explained below. FIG. 6 is a side view of a slitter device in a rotary printing press showing an embodiment of the present invention, and FIG. 7 is a plan view thereof, in which a is cutting paper, b is
is when the running paper is not cut. Components that are the same as those of the prior art are designated by the same reference numerals as in FIGS. 4 and 5. A lever 22 is fixed to the shaft 12, and supports a headed pin 23 at its tip so as to be rotatable in a direction perpendicular to the axis of the slitter roller 3. 24 is an air cylinder whose end is rotatably supported by the rear end of the lever 22, and the tip of a piston rod 25 that slides inside is connected to the shaft end of the headed pin 23. . A slitter upper blade 28, a rubber roller 29 and A sponge roller 30 is rotatably supported via a bearing 31. The slitter upper blade 28 is disposed at a position where the leading end thereof is inserted into the cutting groove 11 while contacting one inner wall surface thereof when cutting the running paper 1. The rubber roller 29 is formed so that its tip end presses against the outer peripheral surface of the slitter roller 3 when cutting the running paper 1. The sponge roller 30 always maintains a compressed state so as to press the slitter upper blade 28 against the rubber roller 29. With the above configuration, air is supplied to the air cylinder 24 so that the tip of the piston rod 25 is connected to the air cylinder 24.
When the paper is inserted further, the roller pin 26 rotates around the headed pin 23 toward the slitter roller 3 as shown in FIG. The upper blade 28 cuts the running paper 1 while being in contact with one inner wall surface of the cutting groove 11.

Also, the air is discharged from the air cylinder 24 and the tip of the piston rod 25 is removed from the air cylinder 24.
When the roller pin 26 is moved inward, the roller pin 26 rotates about the head pin 23 to the opposite side of the slitter roller 3, and the rubber roller 29 and the slitter upper blade 28 are separated from the outer peripheral surface of the slitter roller 3, as shown in FIG. 7b.

Therefore, the slitter upper blade 28 cuts the running paper 1 sharply without swinging or bending at its tip, so that the initial cutting accuracy can be improved.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a folding machine of a conventional rotary printing press, Fig. 2 is a side view thereof, Fig. 3 is a front view thereof,
FIG. 4 is a side view of the slitter device of a conventional rotary printing press, in which a shows the state in which the running paper is cut, and b shows the state in which the running paper is not cut. FIG. 5 is a plan view thereof, and FIG. 6 shows the implementation of the present invention. FIG. 7 is a side view of a slitter device of a rotary printing press showing an example, and FIG. 7 is a plan view thereof, in which a shows a state in which the running paper is cut, and b shows a state in which the running paper is not cut. 1... Running paper, 3... Slitter roller, 4...
...Drag roller, 5...Tumber, 6...Feed roller, 7...Folding drum, 8...Discharge tape, 9...
Frame, 11...cutting groove, 12...shaft,
22... Lever, 23... Headed pin, 24... Air cylinder, 25... Piston rod, 26...
... Roller pin, 27 ... Set screw, 28 ... Slitter upper blade, 29 ... Rubber roller, 30 ... Sponge roller.

Claims (1)

[Scope of utility model registration request] A slitter device in a folding machine of a rotary printing press includes a slitter shaft rotatably supported at both ends by the frame of the rotary printing press body and having a slitter lower blade and a slitter groove on its outer peripheral surface, and both ends parallel to the slitter shaft. A shaft is fixedly supported and has a lever, the tip of the lever is rotatably supported in a direction perpendicular to the axis of the slitter shaft, and the shaft end slides in a cylinder supported by the lever. A headed pin is connected to the tip of the piston rod, and the tip of the roller pin supported by the head of the headed pin is attached to the tip of the roller pin when cutting the running paper.
A slitter upper blade is formed such that its tip is inserted into the slitter groove of the slitter shaft while contacting the inner wall surface thereof, and the slitter upper blade is in contact with one end surface of the slitter upper blade, and the outer circumferential surface of the slitter groove is in contact with the slitter groove when cutting the running paper. A rotary printing machine characterized by being provided with a rubber roller formed so as to press the outer peripheral surface of the shaft, and a sponge rubber formed so as to constantly press the slitter upper blade against the rubber roller from the other end surface of the slitter upper blade. slitter device in the folding machine.