JPS5930627B2 - Folding machine in rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a folding machine in a rotary printing press equipped with a turn bar device that turns a web divided into two by a slitter in a right angle direction and provides a predetermined distance between the webs. Regarding.

In a rotary printing press, the web printed by the printing unit is dried and then sent to a folding machine.

This folding machine consists of a group of rollers that feed the web, a group of cylinders such as folding cylinders that cut the fed web in the length direction and fold it into predetermined signatures, and a conveyor that discharges the signatures. It is configured. Furthermore, depending on the type of notebook, a slinter that cuts the web in half in the width direction and a former that folds the web in half in the width direction are used. FIG. 1 shows a front view, a side view, and a plan view of a conventional folding machine, in which a web 1 passes from a guide roller 2 to a compensator roller 3 to a drag roller 4, and is brought into contact with the center of the drano roller 4. It is divided into two parts in the width direction by a slitter 5 provided therein.

One of the two rows of webs 1a has a guide roller 6,
After passing through the compensator roller 1, reaching the guide roller 8, and being reversed, the turn bar 9 provided with an inclination of 4'f'
It is deflected in the right angle direction by the guide roller 10 and reaches the lead roller 11. After passing the guide roller 6, the other web Ib is spaced apart from the web 1a by two turn bars 12 and 13 that are slightly inclined and provided in parallel. It reaches the lead roller 11 via the guide roller 15. The two rows of webs thus merged at the lead roller 11 are guided to a folding drum (not shown) via the nipping roller 16 and cut into a signature. As described above, the conventional turn bar device has a large number of turn bars, so the structure is complicated and paper threading is troublesome. Furthermore, since the paper bus becomes longer, it is difficult to adjust the tension, and in particular, since only one of the two webs passes through the three turn bars, there is a difference in the tension between the two webs, making the image position narrower. However, it was difficult to adjust the folding machine and the paper cutting function of the folding machine was degraded. The present invention has been made in view of the above points, and the present invention is designed to deflect a web divided into two parts by a slitter in a perpendicular direction by a large diameter part and a small diameter part of one turn bar, and to create a web between the two webs. By configuring the web to have a predetermined spacing, the tension on both webs is made uniform, making it easier to adjust the tension and thread the paper through the folding machine, and also to reduce the number of parts and facilitate assembly and adjustment. The present invention provides a folding machine for a rotary printing press.

The configuration and the like will be explained in detail below with reference to embodiments shown in the drawings. 2 and 3 show a folding machine in a rotary printing press according to the present invention, FIG. 2 being a front view, side view, and plan view thereof, and FIG. 3 being a perspective view thereof. In the figure, the printed web 21 is moved from the guide roller 22j to the compensator a-
The track roller 24 is reached via the roller 23. This compensator roller 23 has an arm 26 fixed to a support shaft 25.
It is rotatably supported on the tip of the handle 2r, and is raised and lowered by rotating a threaded rod 28 using the maple handle 2r. By this lifting and lowering, the length of the web is slightly adjusted. An annular groove is provided in the center of the track roller 24 in the width direction, and a slitter 29 that is supported by an arm and rotates is fitted into and in contact with the annular groove. And the web 21 is attached to this slitter 29! cut in half in the width direction. The stepped guide roller 30 supported on the downstream side of the track roller 24 has a large diameter portion 30a and a small diameter portion 30b with the center as the boundary, as shown in an enlarged cross section in FIG. rotates on the small diameter portion 30b. The outer diameter of each part is formed to be the same as the outer diameter of a turn bar, which will be described later. On the downstream side of the stepped guide roller 30, there is fixedly installed a turn bar 31 which is supported at an inclination of 4f with respect to the traveling direction of the web and has a large diameter part and a small diameter part with the center as a boundary. As shown in FIG. 5, this turn bar 31 has a large diameter portion 31a and a small diameter portion 31b that are connected to the stepped guide roller 3.
It is formed to have the same diameter as the large diameter part 30a and the small diameter part 30b of 0, and both are placed on the same horizontal plane. FIG. 5 is an enlarged plan view of the turn bar 31, in which both the large diameter part 31a and the small diameter part 31b are formed in a hollow tube shape, and the small diameter part 31b
is inserted and fixed into the large diameter portion 31a via the bush 31c. One of the webs 21a of the web 21 divided into two by the slitter 29 is deflected in the right angle direction by the large diameter portion 31a of the turn bar 31, and the other web 21b is deflected by the small diameter portion 31b. deflected at right angles. The end portion of the large diameter portion 31a on the side of the small diameter portion 31b is cut out at a portion through which the web 21b passes. Figure b is a sectional view taken along line AA in figure a. 3n is a stepped guide roller located on the downstream side of this turn bar 31 and provided perpendicular to the track roller, and has exactly the same structure as the stepped guide roller 30, as shown in FIG. It is formed to have the same diameter as the turn bar 31 and is located on the same horizontal plane.

Two guide rollers 33 and 34 corresponding to the webs 21a and 21b are supported below the stepped guide roller 32. One of the guide rollers 33 is configured to be raised and lowered by a threaded rod mechanism similar to that of the compensator roller 23 to finely adjust the length of the web 21b. Further, a nipping roller 35 is supported below these guide rollers 33, 34, and the nipping roller 35 is supported below the guide rollers 33, 34.
1a and 21b are led to the cutting origami part below via this nipping roller 35. This cutting origami part is cutting cylinder 3
6. Composed of a folding cylinder 37 and a gripping cylinder 38, the fed web is cut in the length direction and origami into a predetermined folded paper. On the other hand, a guide roller 39 and a track roller 40 are supported below the track a-ra 24.
Reference numeral 41 denotes a triangular plate-shaped former provided diagonally downward from the track roller 40. When the web 21 is folded in half in the width direction depending on the type of notebook, the web 21 is folded over the guide roller 39. More track roller 4
0, put it in this format 41, and fold it in half. The half-folded web 21 then passes through the lead roller 42 to the folding cylinder 37.
The paper is cut and origami is guided by the paper. The operation of the origami turnbar device constructed as above will be explained.

The web 21 is fed to a track roller 24, and cut in half in the width direction by a slitter 29 in contact with the track roller 24. One of the two divided webs 21a is the web 21a.
enters the large diameter portion 31a of the turn bar 31 from below through the large diameter portion 30a of the stepped guide roller 30, is deflected in a right angle direction, exits from the upper side, and reaches the large diameter portion of the stepped guide roller 32.
Thereafter, the folding cylinder 3r1fC is sent through the guide roller 34 and the nipping roller 35. Also, the other web 21b
passes through the small diameter portion 30b of the stepped guide roller 30, is turned from the lower side to the small diameter portion 31b of the turn bar 31 in a direction perpendicular to the person b, exits from the upper side, and reaches the small diameter portion of the stepped guide roller 32.
Thereafter, it is fed into a folding cylinder 37 via a guide roller 33 and a nipping roller 35. and webs 21a and 2
1b is turned in the right angle direction by the turn bar 31, and at the same time, the turn bar 31 is connected to the large diameter part 31a and the small diameter part 3.
By passing the webs 21a and 21b separately from the turn bar 1b, an interval shown by L in FIG. 6 is provided between the webs 21a and 21b after passing through the turn bar 31. When the inclination angle of the turn bar 31 is 4θ, this distance L and the large diameter portion 31a of the turn bar 31 are
The relational expression L-7 (D-d) holds between the outer diameter D and the smaller diameter d.

Therefore, the outer diameter D. of the turn bar 31 for the required spacing L. d can be set. If it is desired to adjust the length of the web, that is, the position of the pattern, while the web is running, the web 21 before entering the slitter 29 is adjusted by raising and lowering the convencator roller 23, and
The divided webs 21a and 21b are adjusted by adjusting the length of one of the webs 21b by raising and lowering the guide roller 33. FIG. 7 is a plan view showing another embodiment of the present invention, FIG. 7B is a sectional view taken along the line AA, and FIG.

In this embodiment, an air blowing device is provided in addition to the above embodiments. That is, the compressed air is transferred to the turn bar 31.
The air is fed into the small diameter portion 31b of the web 21b, and is ejected from a large number of through holes provided on its outer circumference.The air is also fed into the lower air blowing pipe 43 and blows out through the blowing hole opened toward the entrance side of the web 21a. be done. Further, the air blown toward the entrance side of the web 21a is blown up between the web 21a and the large diameter portion 31a of the turn bar 31. In this way, an air film is created between the webs 21a and 21b and the turn bar 31, and a constant low frictional resistance is maintained at all times. Note that, as a means for reducing the frictional resistance of the turn bar 31, Teflon coating may be applied to the surface of the turn bar 31 without using an air blowing device.

Further, in the above embodiment, the stepped guide rollers 30 and 32 before and after the turn bar 31 are formed into stepped rollers having the same diameter and the same structure as the turn bar 31, but it is not necessary to use stepped rollers. Even if the guide roller is divided into two parts in the width direction so that the outer circumferential surface of the guide roller is located on the same horizontal plane with respect to the large diameter part 31a and the small diameter part 31b of the turn bar 31, the purpose of increasing the distance between the webs cannot be achieved. It will be done. As is clear from the explanation above, according to the present invention, in a folding machine of a rotary printing press, a web divided into two parts by a slitter is entered into the large diameter part and the small diameter part of one turn bar, respectively, and is folded at right angles. By configuring both webs to have a predetermined distance between them at the same time as changing direction, the paper bus can be shortened, mechanical losses caused by frictional resistance are reduced, and the tension of the web is reduced. adjustment becomes easier.

Furthermore, since the same tension is applied to both sides of the web, the paper length becomes uniform and the functionality of the folding machine is improved. Furthermore, since the number of rollers is small, assembly work and paper threading work are facilitated.

[Brief explanation of drawings]

FIG. 1 shows a front view, side view, and plan view of a folding machine in a conventional rotary printing press, and FIGS. 2 to 3 show a folding machine in a rotary printing press according to the present invention, and FIG. 2 is a front view thereof. , a side view and a plan view, FIG. 3 is a perspective view, FIG. 4 is a vertical sectional view of the stepped guide roller, FIG. 5 is a schematic diagram showing the relationship between the turn bar and the stepped guide roller, and FIG. A plan view of the turn bar 1 and its AA sectional view, FIG.
FIG. 21, 21a, 21b... Web, 24...
...Track roller, 29...Slitter, 3
1...Turn bar 1, 31a...Large diameter portion, 31b...Small diameter portion, 32...Stepped guide roller.

Claims (1)

[Claims] 1. A drag roller supported perpendicular to the direction of travel of the web, a slitter opposed to the center of the drag roller, and a support located downstream of the drag roller at an angle of 45 degrees to the direction of travel of the web. A turn bar having a large diameter part and a small diameter part with a central part as a border, and a guide roller located downstream of the turn bar and perpendicular to the drag roller, and the web is divided into two parts by the slitter. One of the webs is deflected in a right angle direction by a large diameter portion of the turn bar, and the other web is deflected in a right angle direction by a small diameter portion of the turn bar and guided to the guide roller. A folding machine in a rotary printing press characterized by the following.