JPH05212847A - Automatic paper passing device of rotary press - Google Patents

Abstract

PURPOSE:To prevent such a phenomenon that non-uniform tension acts on a web by the running resistance in a paper passing route at the time of the automatic paper passage of a rotary press by providing a guide rail having longitudinal cracks on the side surface thereof so as to continuously lay the same along the paper passing route from a paper feed part to a folding part. CONSTITUTION:The paper passing route from a paper feed part 1 to a folding part 9 is branched into a plurality of paper passing routes. When the paper passing route is branched, a turnout device changing over branched paper passing routes are provided to a continuously laid guide rail 32. A web is continuously fed to the folding part 9 from the paper feed part through the branched paper passing routes by this point changeover. A separate guide rail 32 is arranged to the paper passing route to the separate web divided into a plurality of webs in the laterial direcction thereof and the incremental web is fed to the folding part 9 from the divided place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic paper threading device for a rotary press.

[0002]

2. Description of the Related Art A technique disclosed in Japanese Utility Model Laid-Open No. 1-103647 will be described as an example of automatic threading of a conventional rotary press. In the paper passing path as shown in FIG. 5, 1 is a paper feeding section, 2 and 3 are double-sided ink printing units and multicolor printing units provided in the printing section 4, 5 is a web path section, and 6 and 8 are web path sections 5. The drag roller provided with the slitter 7 and the turn bar 9 are folded portions.

Paper from the roll paper loaded in the paper feed unit 1 is
The paper is passed through the folding unit 9 via the printing unit 4 and the web pass unit 5. When performing only double-sided ink-jet printing, the guide roller 10
When the double-sided ink-jet printing and the multicolor printing are performed, the guide roller 11 passes through the paper passing path A, and the guide roller 11 passes through the paper passing path B in which the multicolor printing unit 3 is provided. Is threaded through. In order to switch between the paper threading path A and the paper threading path B, the branching device 12
Is provided. Further, the paper threading path from the drag roller 6 to the folding machine 9 is divided into a straight paper threading path C and a turn bar paper threading path D, and a device 13 for joining the papers from these paper threading paths is provided upstream near the folding section 9. Has been.

A branching device 12 and a merging device 13 are provided along a plurality of preset paper threading paths as described above, and as shown in FIGS. A pipe-shaped guide rail 14 having eyes 19 is laid. The traveling body 18 travels in the guide rail 14 by being driven by a pair of drive rollers 15 and 16 provided in a notch 17 formed at an appropriate interval on the guide rail 14. The traveling body 18 is formed such that its entire length is slightly longer than the interval between the cutout portions 17. Further, a lead paper 22 attached by a reinforcing tape 21 is provided at the tip end of the paper from the roll paper attached to the paper feeding unit 1, and is held by a joint 20 of the traveling body 18 by a clip or the like.

[0005]

The above-mentioned prior art has the following problems. During threading, the paper is guided by a relatively short running body. Since the device for driving the traveling body is provided at an interval slightly shorter than the length of the traveling body,
When the paper path is long, it is necessary to arrange a large number of drive devices, which increases the cost. Further, since the inside of the narrow rotary press frame becomes more complicated, it is usually difficult to perform printing work and maintenance.

[0006] The bending direction is three-dimensionally changed, such as a bent portion of a guide rail provided in a path that changes the path direction by about 180 ° like a paper threading path in a rocking or moving roller, or a paper threading path in a turn bar. When passing through a portion with a large running resistance, such as a twisted portion of a guide rail provided on a path (hereinafter referred to as a "twist"), the traveling body is decelerated to cause slack in the paper, and the paper cannot be threaded well. There is also.

According to the present invention, when the web is automatically threaded by the rotary press, uneven tension does not act on the web due to the running resistance in the paper-passing path, and the web is smoothly threaded even in a portion where the running resistance is large. It is an object of the present invention to provide an automatic paper threading device.

[0008]

[Means for Solving the Problems]

(1) A guide rail that is continuously laid and that has a slit in the longitudinal direction of the side surface is provided along the paper passage path from the paper feed section to the folded section. (2) The traveling body traveling in the guide rail is a traveling body having a length at least equal to the maximum path length of the partial paper passage path in which the paper passage path extending from the paper feed section to the folding section is divided into a plurality of sections. To do. Further, the running body is a flat belt-like member having a rectangular cross section or a cross section corresponding thereto. (3) The running body is provided with rolling elements that reduce running resistance of the running body and guides that receive thrust generated by web tension, at appropriate intervals.

[0009]

[Action]

(1) The paper threading path from the paper feeding section to the folding section is branched in multiple directions and is divided into a plurality of paper threading paths. When branching the paper passing path to the continuously laid guide rail,
A branching device is provided for switching to this branch paper threading path, and by this point switching, paper is continuously threaded from the paper feed section to each folding path through each branch paper threading path. Further, another guide rail is installed in the paper threading path for the other web that is divided into a plurality of pieces in the width direction, and the increased web is threaded from the divided position to the folded portion. (2) The traveling body is divided into a plurality (generally 2 to 3), and is driven by a drive device provided in each divided paper passage. A running body with the same length as the longest partial threading path length,
Insert the paper into the guide rail of the partial paper threading path including the first drive unit from the paper feed section, and connect the leading edge of the web near the paper feed section-side end (upstream end) of this running unit to perform paper threading. To do. Therefore, the running body pulls the paper while pulling,
It runs smoothly along the guide rail without wobbling or waviness in the guide rail. Further, since it is a flat traveling body having a rectangular cross section, it travels in a manner that adapts well to the bent portion, the twisted portion, etc. of the guide rail and does not become stagnant. (3) By the rolling elements provided at appropriate intervals on the running body, the running resistance generated even in a portion having a large running resistance such as a bent portion and a twisted portion of the paper passing path is significantly reduced. (4) In the same manner, the thrust receiver provided on the running body receives thrust acting in a direction orthogonal to the paper threading direction generated by the tension applied to the web when the paper is threaded, and the running body deviates from the specified range, and Prevent it from protruding beyond the slits in the guide rail of the through path.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. A synthetic resin traveling body 31 having a flat rectangular cross section and a low friction coefficient travels in a groove 33 of a guide rail 32 having a slit 34 in a longitudinal direction of a side surface. The running body 31 is provided with rolling elements (miniature bearings in this figure) 35 and thrust receiving guides (bearings in this figure) 36 alternately at appropriate intervals. Further, a joint 37 for attaching the front end of the paper from the roll paper is attached to the portion 31a near the rear end side (upstream side) of the traveling body 31 in the traveling direction with bolts 38. Further, a pair of drive rollers 39a, 39b (shown by the one-dot chain line in FIG. 1) for driving the traveling body 31 have surfaces 40a, 40b which are in pressure contact with both surfaces of the traveling body 31, and a member having a high friction coefficient such as rubber is adhered to the surfaces 40a, 40b. The guide rail 3 has a roughened surface that increases the friction coefficient.
The pair of drive rollers 39 are provided in the two notches (not shown).
a and 39b are arranged.

In FIG. 4, the guide rail 32 continuously laid along the paper threading path from the paper feed section 1 to the folding section 9 has an upstream paper threading path U and a downstream paper threading path L at a point P.
It is divided into partial paper threading routes. Similar to FIG. 5, 1
Is a paper feed unit, 2 and 3 are double-sided black printing units and multicolor printing units provided in the printing unit 4, 5 is a web path unit, and 6 and 8 are drag rollers and slit bars having slits 7 provided in the web path unit 5. , 9 are folding machines. The paths A, B, C and D are a path for double-sided ink printing, a path for double-sided ink printing and multicolor printing, a straight path downstream of the drag roller 6 and a turn bar path downstream of the drag roller 6, respectively. .. Further, 10 and 11 are guide rollers, and 7 is a slitter provided on the drag roller 6.

Before the start of threading, the running body 31 having the same length as the path U is guided into the guide rail 32 of the upstream threading path U from the paper feeding section 1 to the point P. Simultaneously with the start of threading, the running body 31 is driven by the drive rollers 39a and 39b provided at a point Q slightly upstream of the point P so that the running body 31 is attached to a joint 37 provided at a portion 31a near its downstream end. While pulling the leading edge of the paper, guide rail 3
Floating roller 25 on the way, running in the groove 33 of No. 2
The rolling resistance 35 significantly reduces the running resistance generated at the curved portion that changes the direction of about 180 ° provided in the paper threading path of the roller that swings or moves, such as the dancer roller 26, and the paper generated by the web tension. The thrust receiving guide 36 keeps the amount of movement due to thrust in the direction orthogonal to the through direction within an amount S (Fig. 3) within the allowable movement range, and smoothly and stably travels. Next, when the joint 37 enters the downstream threading path L at the point P, the downstream end of the traveling body 31 reaches the downstream point R of the drag roller 27 at the entrance of the triangular plate 28 of the folding section 9, It is driven by a pair of drive rollers 39a and 39b provided slightly upstream of R.

In the downstream paper threading path L, the traveling body 31 is further provided with a slitter 7 through the above-described paper threading path A or B switched by a branching device (not shown) similar to a known rail point switching device. Further, the drag roller 6 to the drag roller 27 travel smoothly through the above-mentioned straight route C or the separately provided turn bar route D. Twisted paper threading path and moving compensator 2 in the turn bar 8 provided in the turn bar path
The running resistance generated in the curved paper threading path of the compensating roller 9 (compensating roller) is drastically reduced by the rolling element 35, and the thrust receiving guide 36 prevents the traveling body 31 from deviating due to the thrust in the orthogonal direction. ..

The thrust force is a joint 3 for attaching the front end of the paper.
Since it concentrates on the vicinity of 7, the guide 36 near the same place can be a rolling element and the other can be a fixed guide for guiding the traveling body 31. In this way, the folding section 9 is fed from the paper feeding section 1.
When the paper threading is completed, the leading edge of the paper is removed from the joint 37, and the driving rollers 39a and 39b provided on the downstream and upstream paper threading paths L and U are reversed to move the traveling body 31.
Is stored in the guide rail 32 of the upstream paper threading path L.
The next paper threading is repeated from this state by the above-described process. Incidentally, the lengths of the respective paper passing paths U and L divided at the point P are U≈L under the condition of U>. Although the paper feed path divided into two sections has been described, the same applies to two or more sections. However, it is not preferable to increase the number of divisions more than necessary in terms of cost, space, operation and maintenance.

[0015]

The present invention is an automatic paper threading apparatus installed along a paper threading path from a paper feed section of a rotary press to a folding section via a printing section and a web path section, and a groove having a rectangular cross section is internally provided. A belt-shaped belt having a guide rail having a longitudinal split on its side surface, a rolling element that travels in the guide rail and engages with the upper and lower surfaces of a groove having a rectangular cross section, and a thrust receiving guide that engages with the side surface. The following effects are obtained by including the traveling body, the drive roll that drives the traveling body by sandwiching it, and the joint that is attached to the traveling body and to which the front end portion of the paper is mounted. (1) Since the running body is belt-shaped, it is well adapted to the shape of the guide rails, especially the shape of the bends and twists, and the rolling and rolling elements provided on the runner at those bends and twists with high running resistance. As a result, this running resistance is significantly reduced and the running body runs smoothly. Also, when the paper is threaded, a thrust force is generated in the direction orthogonal to the paper threading direction due to the tension applied to the web.However, since the thrust receiving guide is provided, the traveling body may deviate from the guide rail and extend beyond the guide rail. There is no. (2) Even if a paper threading path from the paper feeding section to the folding machine is branched in multiple directions, and a paper threading path for an increased web generated by complicatedly dividing the web in the running direction is added, these paper threading paths are also added. A plurality of guide rails and a branching device that are continuously laid along the paper path can perform paper threading along all the paper threading paths. Also, among the partial paper threading paths obtained by dividing the paper threading path from the paper feeding section to the folding machine, the running body is stored by providing a running body that is at least as long as the longest divided paper threading path. There is no need to provide a separate space for the traveling body, and the traveling body is driven by a drive unit provided in each partial paper passage path and travels in the guide rail while pulling the paper edge of the web, so the paper does not meander. Threading is smooth and reliable.

[Brief description of drawings]

FIG. 1 is a sectional view of a guide rail and a traveling body in an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of FIG. 1 at a connecting position between a leading end of paper and a traveling body.

FIG. 4 is a diagram showing a paper threading path, guide rail sections, and drive device positions according to the present invention.

FIG. 5 is a diagram showing a paper passage path described in Japanese Utility Model Laid-Open No. 1-103647.

FIG. 6 is a vertical cross-sectional view of a conventional traveling body and a guide at a position of a drive device.

7 is a cross-sectional view of the traveling body and the guide of FIG.

FIG. 8 is a plan view of FIG. 7 at a connecting position between the leading end of the paper and the traveling body.

[Explanation of symbols]

 31 traveling body 32 guide rail 35 rolling element 36 thrust receiving guide

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Ryozo Tazaki 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Mihara Works (72) Inventor Katsushi Sakamoto 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries Ltd. Inside the factory

Claims (1)

[Claims] 1. An automatic paper threading device installed along a paper threading path from a paper feed section of a rotary press to a folding section via a printing section and a web path section, having a groove of rectangular cross section inside and a side surface. A guide rail having slits in the longitudinal direction, a belt-shaped running body provided with a rolling element that travels in the guide rail and engages with the upper and lower surfaces of a groove having a rectangular cross section, and a thrust receiving guide that engages with the side surface, An automatic paper threading device for a rotary press, comprising: a drive roll that drives the traveling body by sandwiching it, and a joint that is attached to the traveling body and that mounts a front end portion of paper.