JPH05193096A - Automatic paper passing device of rotary press - Google Patents

Abstract

PURPOSE:To provide the present device reduced in abrasion by the reduction of the friction resistance between a pipe-shaped guide rail and a running member. CONSTITUTION:Paper is automatically passed along the paper passing route reaching a folding part from the paper supply part of a rotary press through a printing part and a web pass part. A paper passing device consists of the guide 32 continuously arranged along the paper passing route and having crevices provided to the side surface thereof in the longitudinal direction thereof, running members 37 each formed by passing a wire 35 through the centers of alternately arranged spheres 33 and joint pipes 34 to connect the spheres 33 and the pipes 34 in a rosary form and running through the guide and the joint 39 connected to the joint pipes 34 of the running member 37 to be connected to the leading end part of paper.

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 applied to a rotary press.

[0002]

2. Description of the Related Art As an example of automatic threading of a conventional rotary press,
What is described in Japanese Utility Model Laid-Open No. 1-103647 will be described. With the paper threading route as shown in FIG.
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 equipped with slitters 7 provided in the web path unit 5. The turn bar, 9 is a folding part.

Paper from the roll paper loaded in the paper feed unit 1 is
After passing through the printing section 4 and the web path section 5, the paper is passed through the folding machine 9. When performing only double-sided ink-jet printing, the guide roller 10
The paper passes through the paper passing path A and is passed through the guide roller 11. When performing double-sided ink-printing and multicolor printing, the paper is passed through the guide roller 11 through the paper passing path B in which the multicolor printing unit 3 is provided.

A branching device 12 for switching between the paper threading path A and the paper threading path B 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 located upstream of the folding section 9. It is provided.

A branching device 12 and a merging device 13 are provided along the plurality of preset paper threading paths as described above.
In addition, a pipe-shaped guide rail 14 having cuts 19 in the longitudinal direction of the side surface shown in FIGS. 11, 12, and 13 is laid. The guide rail 14 is driven by a pair of drive rollers 15 and 16 arranged on both sides of a notch 17 formed at an appropriate interval, and runs in the guide rail 14 in a meandering manner, and its total length is A traveling body 18 is provided that is formed to be slightly longer than the interval between the cutout portions 17.

Further, there is a lead paper 22 attached by a reinforcing tape 21 at the front end of the paper, which is attached to the paper feeding section, and is automatically held by a joint 20 of the running body 18 by a clip or the like. It is threaded. Figure 1
2 and FIG. 13 show a traveling body and a driving method according to a conventional method (called A method).

14 and 15 show a traveling body and a driving method according to another conventional method (called B method). Figure 14,
In FIG. 15, 14a is a flat pipe-shaped guide rail,
15a and 16 are drive rollers and 15b is a drive roller 15a.
Is a notch portion, 18a is a belt-shaped traveling body, and 18b is a feed hole provided in the belt-shaped traveling body.

[0008]

Generally, the paper threading device has the following technical problems. (1) If the running body becomes long, problems due to friction occur. Referring to FIG. 12 and FIG. 13, when the traveling body 18 travels in the pipe-shaped guide rail 14, the sliding contact surface is a line contact because the traveling body 18 has the same circular cross section, and the sliding contact surface between the rail and the traveling body. The frictional resistance increases, the drive rolls 15 and 16 shown in FIG. 12 slip, and the traveling body 18 cannot travel.

Further, FIGS. 14 and 15 show a belt-shaped traveling body 18a.
This is an example in which the feed hole 18b for driving is provided on the surface of the feed pin 1. However, similarly to the above, the traveling body is not fed due to a load such as frictional resistance, and the feed pin 1 attached to the drive roll 15a.
Due to 5b, the feed hole 18b is worn and the traveling body 18a cannot be fed. The above-mentioned state often occurs at a portion at a path changing portion such as a swing roller and a moving roller. (2) Since the running body moves through the 180 ° bent portion and the twisted portion, a flexible material is necessarily used. Therefore, the traveling body is distorted in the direction in which the drive roll pushes the traveling body, and meandering or waviness occurs, so that not only the driving force is not efficiently transmitted to the first half of the traveling body, but also the contact area between the rail and the traveling body increases, and more and more. The resistance increases, and the drive unit slips, which makes it difficult to reliably feed the traveling body. (3) As a measure against the above (1) and (2), there is a method of arranging a large number of drive devices. However, this method not only makes the narrow rotary frame more complicated, but also normal printing work and maintenance. The inspection work becomes difficult, and the design of the rotary press becomes a big restriction, which naturally increases the cost.

Examining the above-mentioned three problems with the above-mentioned conventional method, problems (1),
(2) and (3) apply as they are. In the B type, a flexible material is used to overcome a large running resistance, but excessive force is applied to the feed hole of the running body, resulting in wear of the hole.

It is an object of the present invention to provide an automatic paper threading device for rotary presses, which has a small frictional resistance between the pipe-shaped guide rail and the traveling body and therefore has little wear.

[0012]

[Means for Solving the Problems] In order to solve the above three problems, (1) a beaded running body made of a material having high strength and rigidity is used. (2) The contact portion between the traveling body and the rail is made of a spherical body having a low coefficient of friction and is in point contact. (3) Use a wire that is flexible and has tensile strength. (4) A plurality of devices for driving the traveling body are arranged at optimal places so that they can be stably and smoothly operated when the paper is threaded.

The drive roll is installed at a position where it directly contacts the ball of the running body and the joint pipe, and is a V-pley made of a soft material so as to reliably transmit the drive force.

[0014]

[Operation] (1) The paper threading path from the paper feed section to the folding section is
It branches in many directions and is divided into a plurality of paper feeding paths. The guides that are continuously laid have a branching device that switches to the branch paper threading path when branching the paper threading path. , The paper is continuously threaded to the fold.

Since another guide is installed in the paper passing path for the increased web generated by dividing the web in the traveling direction, from the place where the web is divided to the folded portion,
The augmented web is threaded. (2) The traveling body has a plurality of paper threading paths (generally 2-3).
A device for driving the traveling body is provided for each of the divided partial paper passage paths, and a traveling body having the same length as the longest partial paper passage path is included in the portion including the first drive device from the paper feeding unit. The paper is passed through the paper threading path guide, and the leading end of the web is connected near the end (upstream end) of the running body on the side of the paper feeding portion to carry out the paper threading.

Therefore, since the traveling body passes the paper while being pulled, the traveling body smoothly travels along the guide without causing meandering or waviness in the guide. Further, since the running body is in the form of a continuous bead, it adapts well to the bends and twists of the guide and runs stably and smoothly. (3) The one-body traveling body is
Although the deformation stress generated by the elastic deformation acts as a frictional resistance, since the running body according to the present invention has a beaded shape as described above, there is no deformation stress and the contact is a point contact, so that the paper threading is performed. Even in a portion where the traveling resistance is large, such as a curved portion or a twisted portion of the route, it is possible to stably and smoothly travel. (4) Since the ball and the joint pipe are made of a material having a small friction coefficient, the resistance to the guide can be reduced. Further, the wire that penetrates the center of the ball and the joint pipe prevents the ball and the joint pipe from coming apart, and transmits the driving force for pulling.

Further, both ends of the joint pipe are formed in a conical concave shape so that the adjacent beads are always held at the center of the joint pipe and the traveling body is easily bent in any direction. (5) By alternately connecting the sphere and the conical concave portion, the force acts on the center of the traveling direction of the traveling body of the sphere and the connecting pipe, which are adjacent to each other, in the curved portion as shown in FIGS. 7 and 8. Therefore, the power transmission efficiency is improved. (6) Since the beaded traveling body is inserted in the pipe-shaped guide, even if the traveling body receives a thrust load acting in a direction orthogonal to the paper threading direction due to the tension applied to the web, the traveling body has a split groove of the guide. There is no more deviation.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. As shown in the cross-sectional views (FIGS. 3 and 4), the guide 32 has a pipe-shaped cut 36 provided in the longitudinal direction of the side surface. Is reduced.

A traveling body 37 is inserted in the guide 32. The traveling body 37 has balls 33 made of a material having a low friction coefficient and connecting pipes 34 made of a stainless steel pipe alternately arranged, and wires 35 are connected through these center holes in a bead shape. , The ball 33 and the joint pipe 34,
The wire 35 maintains an appropriate tension such that both members are in light contact with each other.

A guide 14 continuously laid along the paper passage path from the paper feed section 1 to the folding section 9 shown in FIG.
Is divided into a partial paper threading path of an upstream paper threading path U and a downstream paper threading path L at a point P. Similar to FIG. 10, 1 is a paper feeding unit, 2 and 3 are double-sided ink printing units and multicolor printing units provided in the printing unit 4, 5 is a web pass unit, and 6 and 8 are slitters 7 provided in the web pass unit 5. Is a drag roller and a turn bar, and 9 is a folding machine.

A is a paper threading path for double-sided ink printing, B is a paper threading path for multicolor printing, and C and D are straight paper threading paths downstream of the drag roller 6 for double-sided ink printing and multicolor printing, and drag rollers. 6 is a turn bar threading path downstream of 6. Further, 10 and 11 are guide rollers, and 7 is a slitter provided on the drag roller 6.

Before the start of threading, a traveling body 37 having the same length as the path U is inserted into the guide 32 of the upstream threading path U from the sheet feeding section 1 to the point P. Simultaneously with the start of threading, the running roller 37 is attached to the joint 39 provided at the portion 38 near the downstream end of the traveling member 37 by the drive rollers 15 and 16 provided at the point Q slightly upstream of the point P. While pulling the leading edge of the paper, the paper runs in the slit 36 of the guide 32.

On the way, the guide rail 32 and the traveling body 37 come into contact with each other at a bent portion which changes a direction of about 180 ° provided in a paper threading path of a roller that swings or moves like the floating roller 25 and the dancer roller 26. The resistance due to
Since it comes into point contact with the spherical surface, frictional resistance is significantly reduced,
You can run smoothly. Further, the thrust in the direction orthogonal to the paper threading direction caused by the tension of the web is also reduced in the same manner as described above, and the traveling can be smoothly and stably performed.

Next, when the joint 39 enters the downstream threading path L from the point P, the downstream end of the traveling body 37 is located at the inlet of the triangular plate 28 of the folded portion 9 and downstream of the drag roller 27. After reaching the point R, the pair of driving rollers 15 and 16 provided on the upstream side of the point R are driven. In the downstream paper threading path L, the traveling body 37 passes through the paper threading path A or B switched by a branching device (not shown) similar to a known rail point switching device, and further, the drag roller 6 having the slitter 7 is provided. From the to the drag roller 27, the vehicle travels in the straight path C described above or in the guide 32 provided separately. The running resistance generated in the twisted paper threading path of the turn bar 8, the curved paper threading path of the moving compensating roller 29, etc. is drastically reduced by the action of the point contact by the spherical surface, and the running body is guided in the guide. Runs smoothly and stably.

When the paper threading from the paper feeding section 1 to the folding section 9 is completed in this way, the leading end of the paper is removed from the joint 39,
It is provided on the downstream and upstream paper feed paths L and U. The driving rollers 15 and 16 are rotated in the reverse direction so that the traveling body 37 is housed in the guide 32 of the upstream paper passing path L. The next paper threading is repeated from this state by the above-described process.

Each of the paper feed paths U and L divided by the point P
The length of is U≈L under the condition of U> L. Further, the paper passage path divided into the above two parts has been described, but the same applies to the case of two or more parts. However, since it is not preferable in terms of cost, space, operation and maintenance to increase the division more than necessary, it is usually divided into two or three.

[0027]

The present invention is an apparatus for automatically threading paper along a paper-passing 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 guide having a slit in the longitudinal direction of the side surface,
Spheres and connecting pipes are arranged alternately, and a running body that is connected in a bead shape through wires through the centers thereof and runs in the guide; and a joint that is connected to the connecting pipe of the running body and is connected to the leading end of the paper. By having the following effects.

Since the running body is a continuous beaded shape, it fits well to the guide and adapts well to the shape of the bending portion and the twisting portion, and the bending portion and the twisting portion with a large running resistance are a part of the running body. Is only in point contact with the wall surface of the guide, the friction resistance generated during running is significantly reduced, and the running body can run smoothly in the guide. Further, since the automatic paper threading device according to the present invention has a small resistance between the guide provided along the paper threading path and the traveling body, the paper threading path leading to the folding machine branches in multiple directions, and the paper threading for the increased web is performed. Even if a path is added, it is possible to smoothly perform threading along all the threading paths.

Further, among the partial paper threading paths obtained by dividing the paper threading path from the paper feeding section to the folding machine, a running body having at least the same length as the classified paper threading path is provided, thereby There is no need to separately provide a space for storing the traveling body, and the traveling body is driven by a driving device provided in one set in each partial paper passage path and travels in the guide while pulling the paper edge of the web, so the traveling body meanders. The threading is smoothly and surely performed without any need.

[Brief description of drawings]

FIG. 1 is a plan view of a main part in an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view of a guide and a sphere of a traveling body.

FIG. 4 is a cross-sectional view of a joint pipe between a guide and a traveling body.

FIG. 5 is a front view of a joint pipe.

FIG. 6 is a side view of FIG.

FIG. 7 is a diagram showing a shape of a traveling body in a straight line portion of a paper passing path.

FIG. 8 is a diagram showing a shape of a traveling body in a curved portion of a paper threading path.

FIG. 9 is a diagram showing the division of guides and the positions of drive devices in the paper threading path according to the present invention.

FIG. 10 is a view showing a paper threading path provided with a conventional automatic paper threading device.

11 is a diagram showing the connection between the running body of FIG. 10 and the leading end of the paper.

FIG. 12 is a front view showing the traveling body, the guide, and the traveling body drive device of FIG.

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

FIG. 14 is a front view showing a traveling body, a guide and a traveling body drive device of another type similar to FIG.

FIG. 15 is a plan view of the traveling body of FIG.

[Explanation of symbols]

 32 guide 33 ball 34 joint pipe 35 wire 36 split 37 traveling body 39 joint

Claims (1)

[Claims] 1. An apparatus for automatically threading paper along a paper path from a paper feed section of a rotary press to a folding section via a printing section and a web path section, the apparatus being continuously installed along the paper threading path. A guide having slits in the longitudinal direction of the side surface, a ball and a connecting pipe arranged alternately, a wire running through the center of each of them, connected in a bead shape, and running in the guide, and a connecting pipe of the running member. And a joint connected to the front end of the paper, and an automatic web threading device for a rotary press.