JPH0745325Y2 - Web cutting device for folder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a web cutting device for a folding machine attached to a web-fed rotary printing press, and relates to a technique for improving the inductive property of a web to a conveyance path.

<Prior Art> A web-fed rotary printing press (hereinafter abbreviated as a printing press) is generally equipped with a folding machine. In addition to the former (triangular plate) that folds the printed web halfway (vertical fold) in the width direction, the folding machine passes the vertically folded web through guide rollers, nip rollers, etc. It also has a cutting cylinder that feeds the knife folding section.

By the way, in a printing machine, the web may be jammed or wound around a cutting cylinder or a folding cylinder for some reason. If the machine continues to operate in this state,
The web is loosened at the entrance of the folder, and an excessive force is generated inside the folder, so that an unexpected failure is induced. Therefore, conventionally, there has been proposed a technique in which a web cutting device is provided between the former and the cutting cylinder, and the web is quickly cut when a paper jam or winding occurs. As a web cutting device, Japanese Patent Laid-Open No. 63-17
The one described in Japanese Patent No. 1772 has a good effect.

This web cutting device is provided between a nip roller and a group of origami cylinders (cutting cylinder, folding cylinder, etc.), and has a cutting blade (saw blade) and an actuator (air cylinder) as basic constituent members. A paper jam or a winding state is detected by an electric detection device, and at the same time when the printing machine is stopped, the actuator moves the cutting blade to move the cutting blade, and the web is cut and discharged to the outside of the machine. Since the plate cylinder and the blanket cylinder constituting the printing unit have a large weight, that is, an inertial mass, it is difficult to stop suddenly, and the discharge amount of the web is several tens of meters.

<Problems to be Solved by the Invention> The conventional web cutting device described above has the following problems.

The web supplied from the paper feeder often has a curl. Therefore, by using a guide plate, etc. at the start of printing or when restarting printing after cutting in the folding machine,
It is necessary to guide the web into the transport path. However, in the above-mentioned web cutting device, the cutting blade that cut the web bites into the opposite side of the conveying path and becomes an obstacle when discharging the web after cutting, and it is difficult to secure a tool insertion space when exchanging the cutting blade. As a result, the guide plate could not be installed.

Therefore, the web cannot be smoothly guided to the origami cylinder group,
There was a risk of work delay due to guiding with a rod or the like, and risk of injury due to the approach of the operator to the cutting blade.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a web cutting device having a guide cover that does not hinder the cutting action or the cutting blade replacement work.

<Means for Solving the Problem> Therefore, in order to solve this problem, the present invention is arranged between a former for vertical folding and a cutting cylinder for horizontal cutting, and drives a cutting blade by an actuator. In a web cutting device for a folder that cuts a web, an openable and closable guide cover is provided at a position symmetrical to the cutting blade with the web sandwiched in order to guide the web, and is formed on the cutting blade side. And a guide cover opening means for opening the guide cover in conjunction with the movement of the cutting blade.

<Operation> While the web is smoothly guided by the guide cover during normal operation, when the paper jam occurs, the web is cut by the cutting blade, and at the same time, the guide bar is flipped up by the guide bar opening means. . Also, the replacement of the cutting blade is performed with the guide cover open and fixed.

<Embodiment> An embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a side view showing a main part of an embodiment of a folder equipped with a web cutting device according to the present invention, which is attached to a printing machine. 2 shows an enlarged view of part A in FIG. 1, FIG. 3 shows a view taken along the line BB in FIG. 2, and FIGS. 4 and 5 show the operation of the web cutting device. The state is shown.

In FIG. 1, reference numeral 1 denotes a former for half-folding the printed web 2 in the width direction, which is supported by a former frame 5 attached to the upper portion of the frame 4 of the folding machine 3. A web 2 half-folded in the longitudinal direction by a former 1.
Is sent to the folder 3, and first passes through the lead roller 6 and the upper nip roller 7. Next, the web 2 is formed with horizontal perforations at predetermined intervals by the horizontal perforation cylinder 8, and pressure is applied by the lower nip roller 9. The web 2 that has passed through the lower nip roller 9 is cut by a cutting cylinder 10 and further folded by a folding cylinder 11.
Is folded in half in the lateral direction. The web 2 cut into a signature is conveyed to the chopper folding section or the like by the gripping cylinder 12 and the transfer cylinder 13, but the description thereof is omitted.

The web cutting device 14 of this embodiment is provided between the lower nip roller 9 and the cutting cylinder 10. As shown in FIGS. 2 and 3, the web cutting device 14 includes an air cylinder 15 fixed to the left and right frames 4, a cutting block 18 connected to a rod 16 of the air cylinder 15 via a bracket 17, and a cutting block 18. The main component is a cutting blade (saw blade) 19 that is bolted to. Air tubes 20 and 21 for supplying working air from a drive control device (not shown) are connected to the front and rear ends of the air cylinder 15 via nipples 22 and 23.
When air is supplied to the nipple 23 behind the air cylinder 15, the cutting block 17 moves forward, and when air is supplied to the front nipple 22, it moves backward.

A cutting blade cover 24 is bolted to the upper surface of the cutting blade 19, and a plurality of inclined convex pieces 25 for guiding the cut web 2 are formed at the rear portion thereof. The inclined convex piece 25 bites into the lower nip roller 9 as shown by the chain double-dashed line as the cutting block 17 advances, but the lower nip roller 9 of the present embodiment is a split roller type and interferes with the inclined convex piece 25. Does not happen. In the figure, 26 is a web guide for guiding the web 2 between the horizontal sewing machine cylinder 8 and the lower nip roller 9, and 28 is an air cylinder for attaching and detaching the lower nip roller 9. Further, reference numeral 29 in the drawing denotes an opening / closing type inspection cover for covering the cutting cylinder 10, and the cut web 2 is guided along the upper surface thereof.

A guide cover 30 made of a steel plate and having an L-shaped cross section is arranged on the left side of the web 2 in FIG. The guide cover 30 is rotatably supported by a stay 32 integral with the frame 4 via a cover shaft 31. A weight 33 is attached to the guide cover 30 and is normally positioned as shown in FIG. A substantially wedge-shaped engaging piece 34 is integrated with the end of the cover shaft 31, and the guide cover 30 swings together with the engaging piece 34.

On the other hand, a substantially wedge-shaped drive plate 35 is also integrated on the upper surface of the cutting blade cover 24 by a method such as welding, and an engagement pin 36 that engages with the engagement piece 34 is formed at the upper end portion thereof. There is. Then, as the cutting blade 19, that is, the drive plate 35 advances, the engagement pin 36 rotates the engagement piece 33, that is, the guide cover 30. That is, in this embodiment, the engaging piece
The guide cover opening means is formed by 34 and the engagement pin 36 of the drive plate 35.

A cutting blade stopper 40 is rotatably supported on a stay 38 bolted to a guide block 37 that guides the cutting block 18 via a stopper shaft 39. The cutting blade stopper 40 is a Z-shaped steel plate, and a stopper pin 41 is formed at one end thereof. Reference numeral 42 in the figure denotes a proximity switch integrated with the guide block 37, which outputs a signal when the cutting blade stopper 40 rotates 90 °. In FIG. 1, reference numeral 43 denotes a movable discharge web storage box for storing the cut web 2.

The operation of the present invention will be described below with reference to FIGS. 4 and 5.

In the folder 3 of this embodiment, the web 2 is guided by the web guide 26 and the guide cover 30 at the start of printing. And
When the web 2 is loosened or jammed, the web cutting device 14 is activated by an output signal of a detection device (not shown).
First, air is supplied to the nipple 23 at the rear of the air cylinder 15, while air is exhausted from the nipple 22 at the front. As a result, the rod 16 extends as shown in FIG. 4, the cutting blade 19 advances together with the cutting block 18, and the web 2 is cut.

At the same time, the drive plate 35 on the upper surface of the cutting blade cover 24 also moves forward, and the engagement pin 36 pushes the engagement piece 34 around. Since the engagement piece 34 is integrated with the guide cover 30, as shown in FIG.
After rotating by an angle of °, the cutting block 18 and the cutting blade 19 can slide. Then, the cut web 2 is also discharged toward the discharge web storage box 43 without hindering its progress as shown in FIG.

When the cutting blade 19 is spilled or worn due to long-term operation, the cutting blade cover 24 is removed and the cutting blade 19 is replaced in this embodiment.

At this time, as shown in FIG.
The cutting blade stopper 40 is rotated by 90 ° while the 30 is rotated by 90 °. Then, the stopper pin 41 formed on the cutting blade stopper 40 contacts the engaging piece 34 of the guide cover 30, and the guide cover 30 is fixed at the open position. Further, in this state, the cutting block 18 is in the retracted position, and the stopper portion 40a formed on the cutting blade stopper 40 faces the front of the cutting block 18 with a gap (indicated by t in the drawing). As a result, both the fixing of the guide cover 30 and the careless forward movement of the cutting block 18 are prevented.

On the other hand, a cutting blade stopper 40 is located on the front surface of the proximity switch 42, and an output signal is issued from the proximity switch 42 to a control device (not shown). When the control device receives the signal, the control device stops all the driving of the air cylinder (pneumatic circuit) and various rollers (electric motor), so that the accident of entrainment does not occur. In this state, the operator sequentially removes the cutting blade cover 24 and the cutting blade 19 to replace them.

Although the description of the specific embodiment has been completed, the embodiment of the present invention is not limited to this embodiment. For example, in the above-described embodiment, the web cutting device 14 is provided between the lower nip roller 9 and the cutting cylinder 10, but it may be provided between the horizontal sewing machine cylinder 8 and the lower nip roller 9, or the like. A link mechanism, a rack mechanism, or the like may be used as the guide cover opening means, or an engaging means for replacing the cutting blade 19 may be provided separately from the guide cover opening means.

<Effects of the Invention> According to the web cutting device for a folding machine of the present invention, an openable guide cover for guiding the web to the conveying path is provided, while the guide cover opening means interlocks with the movement of the cutting block. Since I tried to open
It is possible to achieve both the cutting action and the work of exchanging the cutting blade and the guiding action of the web, and the operability and the productivity are improved.

[Brief description of drawings]

FIG. 1 is a side view showing an essential part of an embodiment of a folder having a web cutting device according to the present invention. FIG. 2 shows A in FIG.
FIG. 3 is an enlarged view of a part, FIG. 3 is a view taken along the line BB in FIG. 2, and FIGS. 4 and 5 are explanatory views showing an operating mode of the web cutting device. In the drawings, 1 is a former, 2 is a web, 3 is a folder, 4 is a frame, 9 is a lower nip roller, 10 is a cutting cylinder, 14 is a web cutting device, 15 is an air cylinder, 18 is a cutting block, and 19 is a cutting blade. , 24 is a cutting blade cover, 30 is a guide cover, 34 is an engaging piece, 35 is a drive plate, 36 is an engaging pin, 40 is a cutter stopper, and 41 is a stopper pin.

Claims (1)

[Scope of utility model registration request] 1. A web cutting device for a folding machine, which is installed between a former for a folding machine and a cutting cylinder for horizontal cutting and drives a cutting blade by an actuator to convey the web. An openable and closable guide cover that is arranged symmetrically with the cutting blade with the web interposed to guide the path, and the guide cover that is formed on the cutting blade side and is interlocked with the movement of the cutting blade to open the guide cover. A web cutting device for a folding machine, comprising: