JPH05200969A - Rotary press automatic paper threading device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention provides an automatic web threading device for a rotary press with low resistance between the guide rail and the traveling body, and thus with less wear. In an apparatus for automatically threading paper along a path from a paper feeding unit of a rotary press to a folding unit via a printing unit and a web path unit, the head has an enlarged cross-sectional shape in an inverted triangle shape. A guide continuously installed along a through path, a flexible traveling body having a cross-sectional shape that encloses the head of the guide, and a top of the guide head pivotally supported on the inner surface of the traveling body. An automatic web threading device comprising a rolling element that comes into contact with a surface and a side surface, and a drive roll that comes into contact with an outer surface of the running body and moves the running body along the guide.

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,
The apparatus described in Japanese Utility Model Laid-Open No. 1-103647 will be described below. In the paper passing path as shown in FIG. 9, 01 is a paper feed section 02 and 03 is a double-sided black printing unit and a multicolor printing unit provided in the printing section 04, 05 is a web path section, and 06 and 08 are web path sections 05. A drag roller provided with a slitter 07 provided and a turn bar, and 09 a folding portion.

The paper from the winding paper loaded in the paper feeding unit 01 passes through the printing unit 04 and the web path unit 05, and then the folding machine 09.
Is threaded through. When only double-sided ink-jet printing is performed, the guide roller 010 passes through the paper passing path A and the guide roller 0
11 is threaded. Further, when performing double-sided ink-jet printing and multicolor printing, the guide roller 011 is passed from the guide roller 010 through the paper passing path B provided with the multicolor printing unit 03.
Is threaded through. A branching device 012 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 06 to the folding machine 09 is divided into a straight paper threading path C and a turn bar paper threading path D, and a device 013 for joining the papers from these paper threading paths is located upstream of the folding part 09. It is provided.

A pipe-shaped guide rail 14 having slits 19 in the longitudinal direction of the side face is laid along the plurality of preset paper threading paths as described above, as shown in FIGS. 10, 11 and 12. Has been done. The guide rail 14 is driven by a pair of drive rollers 15 and 16 provided in a notch portion 17 formed at an appropriate interval to run in the guide rail 14 in a meandering manner, and its entire length is notched. A running body 18 is provided which is formed to be slightly longer than the interval between the portions 17. Further, the leading end portion of the paper from the winding paper loaded in the paper feeding unit 01 has the lead paper 22 attached by the reinforcing tape 21, and by the joint 20 of the traveling body 18,
It is held by clips and automatically threaded. 11 and 12 show a conventional traveling body and drive mechanism (A
FIG. 13 and FIG. 14 show another conventional traveling body and drive mechanism (referred to as method B).

[0005]

Generally, the paper threading device has the following technical problems. (1) If the running body becomes long, problems due to friction occur. Referring to FIGS. 11 and 12, the pipe-shaped rail 14
When the traveling body 18 travels in the inside, the sliding contact surface comes into contact with the line because it has the same circular cross section, and the frictional resistance between the rail 14 and the traveling body 18 increases, and the drive roll 15 shown in FIG. And 16 slip, and the traveling body 18 cannot travel. 13 and 14 show an example in which the feed hole 18b for driving is provided on the surface of the belt-shaped traveling body 18a, but the traveling body 18a is not fed due to a load such as friction resistance as in the above, and the driving is performed. The feed pin 15b attached to the roll 15a causes the feed hole 18b to wear,
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 in the 180 ° bent portion and the twisted portion, a flexible material is inevitably adopted, but this means that the driving force is applied in the direction of pushing the running body. In this case, the traveling body is distorted, meandering, or wavy, and 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 the resistance further increases.
The drive unit slips, which makes it difficult to reliably feed the traveling body. (3) As a measure for the above items (1) and (2), there is a method of arranging a large number of driving devices. However, this method not only makes the narrow rotary frame more complicated, but also a normal printing operation. And make maintenance work difficult. In addition, the design of the rotary press becomes a big restriction, and the cost naturally increases. Conventional A mentioned above
In the method, the above three problems apply as they are. Further, in the B method, a flexible material is used to overcome a large running resistance, but an 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 web threading device for a rotary press having a small resistance between the guide rail and the traveling body, and thus less wear.

[0007]

[Means for Solving the Problems]

(1) A plurality of rolling elements are attached to a traveling body that travels along a guide that guides a paper threading route to reduce wear resistance. (2) The shape of the traveling body is a pipe shape having a special cross-sectional shape that covers the guide with the stopper. (3) Make slits on both sides of the running body at equal pitches. (4) To drive the traveling body, the side surface of the traveling body is directly driven by rollers or the like.

[0008]

[Action]

(1) By attaching a plurality of rolling elements to the traveling body, the abrasion resistance generated between the guide and the traveling body is drastically reduced. (2) Since the traveling body covers the guide, the rigidity is higher than that of the conventional device, and there is no meandering or waviness that tends to occur when the traveling body moves forward and backward, and the transmission efficiency by drive is extremely high. Good for (3) Since the traveling body has slits on both side surfaces, the traveling body can smoothly conform to the guide even in a curved portion. (4) Since the side surface of the traveling body on the outside of the guide is driven, the guide does not have to be divided for the purpose of disposing the drive device, which results in a compact design and a large space in the rotary press frame. Workability such as printing and maintenance is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. 1 to 3 show the positional relationship between the paper threading guide and the traveling body, and show the state in which the guide is attached to the rotary press frame. 4 to 6 show the positional relationship between the tab attached to the traveling body and the leading end portion through which the paper is threaded. FIG. 7 shows a drive mechanism for the traveling body, and FIG. 8 shows a paper threading route.

The paper threading guide 1 is fixed to the inside of a rotary press frame 11 by a rail mount 4, and the running body 2 is covered so as to hold the guide 1. The rolling elements 3 are alternately incorporated and arranged inside the traveling body 2. Therefore, when the traveling body 2 slides on the guide 1, the abrasion resistance between the two can be reduced. Further, the traveling body 2 is provided with slits 2a at equal pitches on both side surfaces thereof so that the traveling body 2 can be smoothly adapted to a bent portion or a twisted portion of the guide 1.

A procedure for attaching the leading end of the paper to be fed will be described with reference to FIGS. In the vicinity of the tip of the traveling body 2 that feeds the paper along the guide 1, the two tab attachments 5 are attached by the joints 6 at positions that do not interfere with the rolling elements 3 inside the traveling body. A tab 7 for holding the front end of the paper threaded through the paper is attached by a connector 8.
An adhesive tape 9 is attached to the surface of the tab 7 for attaching the leading end of the paper to be threaded.

The guide 1 is attached to a side surface inside the rotary press frame 11, and is provided as a guide rail for the traveling body 2 to automatically pass the paper through a predetermined path. Since the three rolling surfaces 3 contact the rolling elements 3 provided inside the running body 2, they are smooth surfaces, and the rolling elements 3 can run smoothly. In addition, the cross section of the guide 1 has a larger cross section system than that of the conventional apparatus, and the guide 1 has a shape that allows the guide to be bent and twisted relatively easily. The traveling body 2 uses a soft and flexible material, but slits 2a are further provided at equal pitches on the side surface in the longitudinal direction of the traveling body so that the curved portion of the guide 1 can be easily followed. Also, in order to reduce the frictional resistance between the guide 1 and the traveling body 2,
Rolling elements 3 are provided in the longitudinal direction of the inside of the running body 2 at a portion directly above the guide and in contact with both side surfaces of the guide, and the rolling bodies 3 are combined so as to hold the guide 2.

FIG. 7 shows a method of driving the traveling body 2. Both sides of the traveling body 2 are sandwiched by a pair of drive rolls 12,
The traveling body 2 moves by rotating the roll 12 while pressing. The drive roll 12 is the traveling body 2
Is configured to move forward and backward, and is configured as a pair on both outer sides of the traveling body 2, and the uneven surface for slip prevention provided on both side surfaces of the traveling body 2 is pressed by a hard rubber roll to move the traveling body 2 To move.

Next, the paper passage path shown in FIG. 8 will be described. The guide 1 continuously laid along the paper threading path from the paper feed section 01 to the folding section 09 is divided into a paper threading path U on the upstream side and a paper threading path on the downstream side at a point P. Has been done. As in FIG. 9, 01 is a paper feed unit, and 02 and 03.
Is a double-sided black printing unit and a multicolor printing unit provided in the printing unit 04, 05 is a web path unit, and 06 and 08 are drag rollers equipped with a slitter 07 provided in the web path unit 05 and a folding machine with a turn bar. The paths A, B, C, and D are a path for double-sided ink printing, a straight path downstream of the drag roller 06 for double-sided ink printing and multicolor printing, and a turn bar path downstream of the drag roller 06. is there. Further, 010 and 011 are guide rollers and 0
Reference numeral 7 is a slitter provided on the drag roller 06.

Before starting the paper threading, the traveling body 2 is incorporated in the guide 1 of the upstream paper threading path U from the paper feed section 01 to the point P. Simultaneously with the start of threading, the driving roller 12 provided at the point Q slightly upstream of the point P causes the traveling body 2 to move from the winding paper attached to the tab 7 of the tab attachment 5 provided at a portion near the downstream end thereof. The paper runs on the guide 1 while pulling the front end of the paper. Like the floating roller 25 and the dancer roller 26 on the way, the contact resistance between the guide and the traveling body, which is generated in the curved portion that changes the direction of about 180 ° provided in the paper threading path of the swinging or moving roller, causes the traveling body 2 to have a contact resistance. Due to the rolling elements 3 provided and the slits 2a provided on both side surfaces, the number of rolling elements is significantly reduced, and stable and smooth running is possible. Also, the thrust in the paper threading direction generated by the tension of the web can be smoothly moved as in the above.

Next, from the point P, the tab 7 is located at the downstream paper threading path L.
At the time of entering, the tip of the traveling body 2 on the downstream side is 0
It reaches a point R on the downstream side of the drag roller 27 at the entrance of the triangular plate 28 of No. 9 and is driven by a pair of drive rollers 12 provided upstream from the point R. In the downstream paper threading route L, the traveling body 2 passes through the above-described paper threading route A or B switched by a branching device (not shown) similar to a known rail point switching device, and further, the slitter 07.
From the drag roller 06 provided with the above to the drag roller 27, the vehicle travels on the above-described straight path C or on a separately provided rail. The running resistance generated in the twisted paper threading path in the turn bar 08, the curved paper threading path of the moving compensating roller 29, etc. is drastically reduced by the action of the rolling elements 3 and the slits 2a. Runs in a stable condition.

When the paper threading from the paper feed section 01 to the folding section 09 is completed in this way, the leading edge 10 of the paper is removed from the tab 7 and the drive provided on the downstream and upstream paper threading paths L and U. The roller 12 is rotated in the reverse direction to move the traveling body 2 onto the guide of the upstream paper threading path L. The next paper threading is repeated from this state by the above-described process. In addition, P
The length of each paper passing path U and L divided by the point is U> L
Under the condition of, U≈L. The paper passage path divided into two sections shown in FIG. 8 has been described above, but the same applies to two or more sections. However, increasing the number of categories more than necessary
Since it is not preferable in terms of cost, space, operation and maintenance, it is usually divided into two or three.

[0018]

In the apparatus for automatically threading paper along the path from the paper feed section of the rotary press to the folding section via the printing section and the web path section, the head has a cross-sectional shape enlarged in an inverted triangle shape. A guide which is continuously installed along the paper threading path, a flexible running body having a cross-sectional shape that wraps around the head of the guide, and the guide head pivotally supported on the inner surface of the running body. The following effects can be obtained by including the rolling element that abuts on the top surface and the side surface and the drive roll that abuts on the outer surface of the running body and moves the running body along the guide. (1) A rolling element is built into the inside of the running body to embrace the guide, and the three-dimensional structure fits well to the guide. In addition, since the traveling body has the possibility, even in the shape of the bent portion and the twisted portion, it adapts well to the guide,
The frictional resistance generated during running is significantly reduced, and the running body can run smoothly. (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 is added to the additional web generated by dividing the web running direction into a plurality of directions, the paper threading paths are added along these paper threading paths. With the continuously installed guide and branching device,
Threading can be performed along all the threading paths. (3) By providing a traveling body having at least the same length as the divided paper passage route among the partial paper passage routes obtained by dividing the paper passage route from the paper feeding unit to the folding machine, There is no need to provide a separate storage space, and the traveling body is driven by a drive unit provided in each partial paper-passing path and travels on the guide while pulling the paper edge of the web, so the traveling body must meander. Without threading, it is smooth and reliable.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side sectional view of FIG.

FIG. 4 is a diagram showing the traveling body, the tab, and the leading end portion of the paper shown in FIG.

FIG. 5 is a plan view of FIG.

FIG. 6 is a side sectional view of FIG.

7 is a view similar to FIG. 3 in the position of the drive roller.

FIG. 8 is a diagram showing an example of a paper threading route according to the present invention.

FIG. 9 is a diagram of a paper threading route described in Japanese Utility Model Laid-Open No. 1-103647.

FIG. 10 is a diagram showing a leading end portion of a paper and a joint in a conventional paper threading device.

FIG. 11 is a diagram showing a drive portion of a conventional paper threading device.

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

FIG. 13 is a diagram showing a drive portion of another conventional paper threading device.

14 is a plan view of the belt-shaped traveling body shown in FIG.

[Explanation of symbols]

 1 Guide 2 Running body 3 Rolling body 11 Rotary press frame

Claims (1)

[Claims] 1. An apparatus for automatically threading paper along a path from a paper feed section of a rotary press to a folding section via a printing section and a web path section, wherein a head has a cross-sectional shape enlarged in an inverted triangle shape. A guide which is continuously installed along the paper threading path, a flexible running body having a cross-sectional shape that wraps around the head of the guide, and the guide head pivotally supported on the inner surface of the running body. An automatic web threading device for a rotary press, comprising: a rolling element that abuts on a top surface and a side surface of the traveling body; and a drive roll that abuts on an outer surface of the traveling body and moves the traveling body along the guide.