JPH0796419B2 - Folding device former - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding device former, and more particularly to a folding device former for a rotary press.

[0002]

2. Description of the Related Art For example, in a rotary press 60 shown in FIG. 5, a web material W is sequentially drawn and travels from a paper feeding device 61 to a folding device 63 via a printing device 62 to print, cut and fold. Tatami is performed. In order to allow the web 64 to smoothly travel along the guide surface of the former 64 in the former 64 of the folding device 63, in the prior art, for example, Japanese Utility Model Publication No. 43-2729 and Japanese Utility Model Publication No. 60 are used.
-119059, Japanese Utility Model Laid-Open No. 60-173326, Japanese Utility Model Laid-Open No. 3-46459, Japanese Utility Model Laid-Open No. 4-4425.
Various measures have been taken, such as those shown in JP-A-7.

According to the means disclosed in Japanese Utility Model Publication No. 43-2729, the air is supplied between the guide surface of the former 64 and the web material W so that the web material W floats above the guide surface. It reduces the frictional resistance to.

The means disclosed in Japanese Utility Model Laid-Open No. 60-119059 is such that a rotatable disc is provided at the tip of a former 64 and the former is rotated to rotate the former.
The frictional resistance to the web paper W at the leading end of 64 is reduced.

In the means disclosed in Japanese Utility Model Laid-Open No. 173326/1985, the side edge portion of the former 64 is composed of a rotatable tapered tube, and a drive pressing roller opposed to the side edge portion is provided. By providing the drive roller, the web material W is pressed against the side edge portion by the drive roller, and is driven to rotate, so that the web material W is forcibly run in cooperation with the rotatable tapered tube.

The means disclosed in Japanese Utility Model Laid-Open No. 3-46459 applies a gliding solution between the front end surface of the former 64 and the web material W so that the web material W at the front end of the former 64 is applied to the web material W. It reduces frictional resistance.

The means disclosed in Japanese Utility Model Application Laid-Open No. 4-44257 causes the former 64 to generate a vibration of a small amplitude having a frequency higher than the natural frequency of the web material W, so that the web material W is guided from the guide surface of the former 64. By floating
The frictional resistance to the web material W is reduced.

On the other hand, in a device for changing the traveling direction of a web-shaped material such as a strip of web material or a strip, a known means for directly or indirectly supporting the web-shaped material and arranging a rotor on a surface for guiding the travel is specially described. It is disclosed in JP-A-56-127538 and JP-A-61-86354.

[0009]

The means for reducing the frictional resistance between the guide surface and the web paper in the former according to the above-mentioned prior art has the following problems.
In the one disclosed in Japanese Utility Model Publication No. 43-2729, since the web material paper travels with the air layer as a guide surface, the traveling position of the web material paper is unstable and easily misaligned in the width direction. It is not fixed and often the folds are not well formed. Further, not only equipment for supplying a predetermined amount of air constantly is required, but also the running cost thereof increases.

The one disclosed in Japanese Utility Model Publication No. 60-119059 can reduce the frictional resistance of the front end of the former to the web material, but the frictional resistance of the other part of the former to the web material is nothing. It has no influence.

In the one disclosed in Japanese Utility Model Laid-Open No. 60-173326, since the web material is fed out in cooperation with the tube on the taper and the drive pressing roller, it is rather performed in the width direction of the web material. However, it did not correspond to the running direction of the web material paper, and provided a large amount of unnecessary force for running the web material paper.

The method disclosed in Japanese Utility Model Laid-Open No. 3-46459 cannot be arbitrarily used because the gliding solution to be supplied affects the commercial value of the printed matter, and therefore the former and the web paper with the gliding solution cannot be used. The effect of reducing frictional resistance cannot always be obtained.

In the one disclosed in Japanese Utility Model Laid-Open No. 4-44257, the vibration is transmitted to a portion other than the former, causing the folding device to vibrate unnecessarily, and the tightening portion seems to be loose due to the vibration. There is a risk of accidents. Further, since the web material is floated from the guide surface of the former and travels, the traveling position is unstable and it is easy to shift in the width direction, and the position of the fold line at the tip of the former is not fixed.

Further, the known means having a guide surface on which a rotor is arranged is to change the entire width of the belt at once, and to change the directions of both sides of the belt to different directions.
It is not something that can be folded. This invention
Solving various problems in the above-mentioned known former,
Moreover, it is an object of the present invention to provide a former capable of significantly reducing the frictional resistance to the web material.

[0015]

The former of the folding apparatus according to the present invention is provided along both sides of a substantially triangular shape in which the base portion is adjacent to the upstream roller and the apex portion is adjacent to the downstream nipping roller. A plurality of rotors that are in contact with the folding areas on both sides of the web material are arranged in each of the two guide surface areas that guide the two sides of the running web material.
The rotor arranged on one side edge portion and the rotor arranged on the other side edge portion are provided substantially symmetrically so as to be able to rotate in mutually different directions as the web material travels. There is.

[0016]

The web material runs on the former of the folding device, and both side edges are bent and guided along the longitudinal direction by the both side guide surface areas, and gradually folded into two folds, and in a two-fold state. It is added to the downstream nipping roller. When the web material travels on the former, it contacts the rotor at least in the two guide surface areas where the frictional resistance is large, and the rotor is rotated in the traveling direction by the web material, so that the web material does not interfere with the former in traveling. Friction is well-balanced and becomes so-called rolling friction, which is significantly reduced. Then, the two-fold of the web material is guided by the rotors arranged in the both guide surface areas, and the left and right tensions are balanced at the same time, so that the fold line is surely formed at a predetermined position.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A former of a folding device for a rotary press according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, an upper drag roller 1 and a lower nipping roller 2 are provided in a rotary press (see FIG. 5) at right angles to each other, and the former 3 is a drag roller 1. The main guide portion 4 of an isosceles triangle consisting of the bottom along the axial direction on the upper peripheral surface of and the apex at one end of the nipping roller 2 and the side extending from the apex of the isosceles triangle to both points on the bottom. As shown in FIG. 2, the main guide portion 4 is composed of curved side edge guide portions 5 and 5 with the vertex as a common vertex,
The main guide portion 4 is provided so as to be inclined along the traveling direction. The main guide portion 4 and the side edge guide surfaces 5 and 5 are provided with a rotor 6 as shown in FIG. 3 or 4.

The rotor installation will be described in detail. The main guide portion 4 and the side edge guide portions 5 and 5 have a hole 7 through which the rotor 6 can be seen.
Are perforated in an appropriate arrangement. For example, in the main guide portion 4, the side edge guide portions 5, 5 are distributed at appropriate vertical and horizontal intervals.
5 are arranged along the main guide portion 4 at appropriate intervals.

The rotor 6 is, as one form, as shown in FIG.
As shown in (a) and (b), it is a ball bearing type, and a mounting shaft 82 is fitted to an inner ring 81 of the ball bearing 8, and particularly, in FIG.
In the case shown in (b), the outer ring surface is spherical. The plurality of ball bearings 8 arranged are attached to the main guide portion 4 and the side edge guide portion 5, respectively. That is, each ball bearing 8
The outer ring 83 is partially removed from each hole 7,
The outer peripheral surface of the main guide portion 4 and the side edge guide portion 5 are flush with the guide surfaces of the main guide portion 4 and the side edge guide portion 5, or slightly protrude from the guide surface by the mounting shaft 82. It is properly attached to No. 5. The axis of rotation of the mounting shaft 82 is orthogonal to the running direction of the web material. That is, the rotation axis of the mounting shaft 82 is, in the main guide portion 4,
The axis of rotation is parallel to the axis of the drag roller 1, the side edge guides 5 are orthogonal to the running of both sides of the folded web material, and the side edges guides 5, 5 are symmetrically oriented. It is oriented so as to intersect with the guide section 4.

As another type of the rotor 6, as shown in FIG. 4, there is a ball bearing body type capable of rotating in all directions, and a ball bearing body 9 is used.
Is configured such that a bearing ball 93 is rotatably fitted to a spherical cup 91 via a group of small balls 92, and the outer peripheral surface of the bearing ball 93 is the same as the guide surface of the main guide portion 4 and the side edge guide portion 5. A spherical cup 91 is appropriately attached to the main guide portion 4 and the side edge guide portion 5 by being inserted into the hole 7 so as to be on a flat surface or slightly protruding from the guide surface.

The operation of the former of the folding device will be described. The web material W that has passed the peripheral surface of the drag roller 1 travels on the gradually narrower guide surface of the main guide portion 4 of the former 3 and on the guide surface of the side edge guide portion 5 while guiding both side edges thereof. The guide surface of the portion 5 bends and guides along the longitudinal direction, gradually folds into two folds, and is held in the nipping roller 2 in a two-fold state and guided to the cutting cylinder or the like.

When the web material paper W travels on the guide surfaces of the main guide portion 4 and the side edge guide portions 5, the rotor 6, that is, the outer ring 83.
Alternatively, the balls 93 come into contact with each other and are rotated in the traveling direction by the web material W, so that the friction of the web material W with the former 3 when traveling is so-called rolling friction and significantly reduced.

Especially, when the outer peripheral surface of the outer ring 83 or the outer peripheral surface of the bearing ball 93 is slightly projected from the guide surfaces of the main guide portion 4 and the side edge guide portion 5, most of the web material W traveling on the former 3 is run. Since only the outer peripheral surface of the outer ring 83 or the outer peripheral surface of the bearing ball 93 comes into contact with the outer ring 83, the frictional resistance during traveling by the former is further reduced. The two folds of the web material W guided by the outer peripheral surface of the outer ring 83 or the bearing balls 93 on the guide surfaces of the main guide portion 4 and the side edge guide portion 5 maintain the balance of the left and right tensions simultaneously. The crease is surely formed at a predetermined position.

In the above embodiment, the rotor 6 is provided on both the main guide portion 4 and the side edge guide portions 5 and 5, but the main guide portion 4 is omitted and both sides have large frictional resistance. Even if it is provided only on the side edge guide portions 5 and 5, a certain effect can be obtained. Further, without actively providing the main guide portion 4 and the side edge guide portions 5 and 5, only the rotors 6 are attached and arranged substantially in an appropriate arrangement by a fixture or a rotor having an appropriate shape is attached. Alternatively, the traveling web W may be supported and guided only by the rotor.

[0025]

In the former of the folding device according to the present invention, the running position of the web material as in the conventional former is unstable and it is displaced in the width direction, the crease cannot be firmly attached, the running cost is increased, or It is possible to eliminate inconveniences and troubles such as reduction in commercial value of printed matter due to the gliding liquid and occurrence of accidents due to vibration, and it is possible to reduce friction resistance against the web paper folded while traveling in the former in a well-balanced manner.

As a result, the two folds of the web material, which are guided by the rotors arranged in the guide surface areas on both sides, are simultaneously folded to the left and right,
The balance of the left and right tensions is maintained, the folds can be surely formed at predetermined positions, and the tension of the web material running on the former can be easily controlled. In addition, it is possible to create a multi-page printed matter by increasing the number of web material sheets to be superposed on the former.

[Brief description of drawings]

FIG. 1 is a front view of a former of a folding device according to an embodiment of the present invention.

FIG. 2 is a side view of the former of the folding device according to the embodiment of the present invention.

3 is a sectional view of a ball-bearing type rotor in the former of the folding device of FIG.

FIG. 4 is a partial cross-sectional view of a ball bearing type rotor in the former of the folding device of FIG.

FIG. 5 is a schematic view of a rotary press provided with a former of a folding device according to an embodiment of the present invention.

[Explanation of symbols]

 1 Drag roller 2 Nipping roller 3 Former 4 Main guide part 5 Side edge guide part 6 Rotor 7 hole 8 Ball bearing 81 Inner ring 82 Mounting shaft 83 Outer ring 9 Ball bearing 91 Spherical cup 92 Small ball 93 Bearing ball

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65H 45/30 9245-3F

Claims (1)

[Claims] 1. A base is adjacent to an upstream roller, and the apex
Part of the triangular shape adjacent to the nipping roller on the downstream side
It is provided along both sides, so that both sides of the running web
Each of the guide surface areas on both sides for folding and guiding
There are several rotors arranged in contact with the bending area on each side.
The rotor arranged on one side edge and the rotor on the other side edge.
The arranged rotors and the rotors are aligned with each other as the web stock runs.
Provided to be able to rotate in different directions and substantially symmetrical
And that former of the folding device.