JP2012046281A - Continuous paper folding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding device which can bundle paper in zigzag shape to deliver it as a product even in a swelling state near a folding perforation in the paper with its thickness exceeding 170 μm.SOLUTION: The folding device 1 includes a shooter 11 delivering continuous paper downward while swinging it; a spiral part comprising at least a pair of spirals 4, 5 for folding the continuous paper 2 delivered from the shooter 11, in zigzag shape while transferring it downward; and a conveyor part 10 changing the direction of the continuous paper 2 folded by the spiral part and delivered, into a substantially horizontal direction to transfer it. A rotating roller 7 is provided in a position to abut on a fold-up part Fm4 of the continuous paper delivered from the spiral part.

Description

The present invention relates to a folding device in the manufacture of continuous paper. In particular, the present invention relates to a thick continuous paper folding apparatus.

  A conventional continuous form manufacturing apparatus has a folding processing step in addition to processing such as printing and folding perforations. The process is completed by zigzag folding by a folding device. In the folding apparatus, as a first step, there is a shooter that swings in order to distribute according to the period of the folding perforation. Below that, there is a spiral portion that folds while rotating with respect to the perforation of the paper transferred from the shooter. The continuous forms that are folded in a spiral and stacked in a zigzag shape are discharged on the conveyor in a sufficiently long length so that the quality can be confirmed without cutting.

Continuous forms are used as notification documents and publicity media for customers in various companies such as the financial industry, insurance industry, telecommunications companies, and local governments. The paper used is high-quality paper, and the thickness is often 50 μm to 130 μm. The folding device has a mechanism that matches this paper thickness. As the paper becomes thicker, the paper becomes extremely stiff and difficult to fold. On the other hand, when the paper thickness is reduced, the rigidity decreases and the paper is bent in the middle and is not broken. Since the stiffness of the paper, called the waist of the paper, is proportional to the cube of the thickness, the thick paper has high stiffness and is difficult to bend.

For example, in the continuous form folding apparatus disclosed in Patent Document 1, a pair of form support bars having L-shaped cutouts are provided so that a sheet having a thickness of 130 μm can be continuously folded.

Reality 6-43088

However, for thick paper having a paper thickness exceeding 170 μm, since the vicinity of the fold has a curved bulge, it is not possible to have a folded state in which each sheet has a parallel surface shape unlike a paper having a thickness of 130 μm or less. Further, in the process of loading from the folding device to the horizontal conveyor, in the case of a paper having a thickness of 170 μm or more with high rigidity to be transferred while changing the direction from the vertical direction to the horizontal direction, the vicinity of the fold (the mountain fold portion or the valley fold) The portion) is stretched like a V-shaped spring and cannot be folded into a neat state, and often reverses in the direction opposite to the transfer direction. Thus, in the conventional folding apparatus, the continuous sheet of thick paper stays in the apparatus without being able to be folded and the operation stops, and therefore the entire manufacturing apparatus is stopped to eliminate the defective product generated.
As described above, according to the folding apparatus as shown in Patent Document 1, it is not possible to sufficiently fold the thick paper exceeding 170 μm at the spiral portion. When the thickness exceeds 170 μm, the crease leaves the spiral portion with the bulge remaining. This phenomenon occurs when the high-quality base paper used for continuous forms is mainly made of pulp with long fibers made of conifers. A paper containing a lot of long fibers has a strong inter-fiber bonding force, so that the rigidity increases, and this phenomenon occurs as the paper thickness increases. On the other hand, if short fiber pulp is used to lower the stiffness, it becomes easy to fold, but the folds are likely to break, and cannot be used for continuous slip applications where mechanical external force is applied. The paper currently used contains a lot of long fibers made of conifers.

Therefore, the present invention has been made in view of such a problem, and in a paper having a paper thickness exceeding 170 μm, even if the vicinity of the folding perforation is swollen, the folding can be bundled in a zigzag shape and discharged as a product. It is an object to provide an apparatus.

  In continuous paper having a paper thickness exceeding 170 μm, the fold perforation has a structure stretched like a V-shaped spring. In order to provide a folding mechanism that does not cause poor folding and paper jamming in the machine even if this phenomenon occurs, the first aspect of the present invention includes a shooter that discharges downward while swinging continuous paper, and the shooter A spiral portion composed of at least a pair of spirals for transferring the discharged continuous paper downward while being zigzag-shaped, and a conveyor for transferring the continuous paper folded and discharged by the spiral portion in a substantially horizontal direction. The continuous sheet folding device is characterized in that a rotation roller is provided at a position in contact with the mountain fold portion of the continuous sheet discharged from the spiral portion.

For continuous paper having a paper thickness exceeding 170 μm, the paper advances in the apparatus without a clear crease as described above. The continuous paper proceeding vertically downward from the spiral part is changed in the horizontal direction in order to confirm the print contents and the like, and is discharged on the horizontal conveyor part.
In the present invention, a direction changing unit is provided to place continuous paper on the horizontal direction conveyor unit.
In this direction change part, you may provide the traveling belt which has an angle with respect to an apparatus bottom side. At the time when the valley fold is placed on the horizontal conveyor and transferred to the left, the mountain fold swells like a reverse V-shaped spring and acts as a force that projects in the direction opposite to the transfer direction. It will be in a state of falling toward a certain direction changing section, preventing the subsequent continuous paper from proceeding.

This device is provided with an anti-inversion device in order to suppress the force that causes the mountain fold to fall.
The second aspect is characterized in that the rotation rollers are provided in the vicinity of the left and right edges of the continuous sheet as the inversion preventing portion. Using this rotating roller, it was possible to prevent the mountain fold from being inverted and to transport and discharge it by a horizontal conveyor.
The rotating roller is effective if it is freely rotated without applying power and the set position is appropriate, and when the set position must be changed frequently, it is rotated by power and is applied by the mutual force with the horizontal conveyor. Inversion can be prevented.

According to the folding device of the present invention, the rotation roller is provided at a position in contact with the mountain fold portion of the continuous paper discharged from the spiral portion, so that the fold of the mountain fold portion near the folding perforation is in the direction opposite to the transport direction. The force that the folding sewing machine part tends to fall down can be suppressed, and stable transfer in the horizontal direction can be achieved. Therefore, the continuous folding of thick paper can be smoothly performed. Furthermore, it can be used for films having high rigidity.

It is a side view showing the outline of the whole of the present invention. It is a top view of FIG.

Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing an outline of the whole folding apparatus, and FIG. 2 is a plan view of FIG.

Hereinafter, the folding apparatus 1 of the present invention will be described in the order of a shooter 11, a spiral 4, a spiral 5, a direction changing unit 6, a rotating roller 7, and a horizontal conveyor unit 10. After the printing and perforation processes are completed, the continuous paper that enters the folding device has a perforation that becomes a mountain fold and a perforation that becomes a valley fold. Specifically, the continuous paper 2 is high-quality paper 110 kg / sixty-six paper, which has been subjected to offset printing and folding sewing machine processing (non-cut portion 1.0 mm; cut portion 2.0 mm) and the like. The folding device 1 is entered via the roller 3. At this time, the front printing surface of the continuous paper 2 is Sf, the back printing surface is Sb, and the folding folding perforations Fm, Fv, Fm, and Fv are processed. The perforated surface of the front printed surface Sf is Fm, and the perforated surface is Fv. Incidentally, Fm0 in FIG. 1 is perforated so that the printed surface Sf of the front surface will become a mountain shape, and Fv0 is perforated so that the printed surface Sf of the front surface will become a valley shape.

The continuous paper is transported by a paper feed roller group and enters the shooter 11 via a transport roller 3 provided at the entrance of the folding device 1.
The shooter 11 is swung in the direction of arrow S by a swinging portion (not shown), and the perforation Fm is placed between the spirals 4 that work so that the perforation Fm becomes a mountain fold, and the perforation Fv is valley-folded. A perforation Fv is placed between the spirals 5 that act as parts. As described above, the position and swing angle of the shooter 11 are adjusted with respect to the spiral 4 and the spiral 5 to adjust the timing.
The spiral part is creased so as to be zigzag with the rotation of the spiral, and is composed of a spiral 4 that forms a mountain fold part and a spiral 5 that forms a valley fold part. Two (four in total) are provided. In the present embodiment, an example in which there are two pairs of spirals (a total of four) is shown, but at least a pair of spirals (a total of two) is sufficient.

The perforation Fm on the upper surface of the spiral 4 and the perforation Fv on the upper surface of the spiral 5 are preceded by a crease as the spiral rotates. The perforation Fv1 moves downward in order. The inclination angle of the spiral of the spiral is set in advance so that a folding angle is added to the perforation as it rotates. For example, the thick paper 2 having a paper thickness exceeding 170 μm has high rigidity, so that the lowermost part of the spiral is left without a clear crease regardless of the inclination angle of the spiral.

Each crease progresses vertically downward while having a V-shaped bulge, but the mountain fold perforation Fm2 is in a two-fold state of a three-month shape due to the weight of the paper and the feeding force from above.
The continuous paper 2 needs to change the transport direction in the horizontal direction for the progress in the vertical direction, and is provided with a direction changing unit 6. The purpose of converting the transport direction to the horizontal direction is to confirm the contents of printing in a continuous state. In this direction conversion unit 6, the belt fold perforation Fv2 is inclined by a belt 8 inclined at 45 degrees. The valley fold perforation Fv2 that has been directed downward and turned to the right changes its direction downward. (The valley fold perforation turns 90 degrees clockwise and turns downward)
A belt 8 is provided obliquely between the lower part of the spiral 5 and the horizontal conveyor 10.
The belt 8 is for allowing the valley fold perforation Fv2 to smoothly transition to the horizontal conveyor 10. By making the belt 8 and the central axis of the horizontal conveyor 10 approach each other, it is possible to prevent a gap between them from being opened. The conveyor speed of the belt 8 and the horizontal conveyor 10 can be adjusted by independent driving, and the traveling speed of the belt 8 is adjusted so as to ride on the horizontal conveyor 10 without gradual.

The shape near the valley fold perforation Fv3 varies depending on the surface shape of the belt 8 and the traveling speed.
The shape in the vicinity of the valley fold perforation Fv3 in FIG. 1 is a crescent shape formed when the belt 8 is at a slightly lower speed. When the valley fold perforation Fv4 rides on the horizontal conveyor 10 (the valley fold perforation on the right side becomes the lower side) and is discharged to the left side, the vicinity of the mountain fold perforation Fm4 acts as a V-shaped spring. Bulges, and moves toward the right side of the device. This device is provided with an anti-reversing device in order to suppress the force of the mountain fold perforation Fm4 and the vicinity to fall down. A rotating roller was used in the reversal prevention device of this embodiment. The rotary rollers 7 are provided in the vicinity of the left and right edges of the continuous paper when viewed in the plan view of FIG.

A rotating roller 7 having no power is used as the roller of this embodiment. Power may be applied to make the paper thicker or to further increase the speed. Further, the surface of the rotating roller 7 may be uneven or corrugated according to the quality of the paper.
Synthetic rubber such as urethane rubber is used as the material of the rotating roller 7, but any material can be used as long as it can be appropriately held and separated according to the paper quality. When the power is not used, the setting position of the rotary roller 7 is set to a position where the vicinity of the mountain fold perforation Fm4 can be prevented from falling in the direction opposite to the transfer direction by the action of the V-shaped spring. When power is used, the setting position can be changed widely by associating the conveyance speed and rotation speed of the horizontal conveyor 10 with each other. Note that the upper limit of the thickness of continuous paper that can be applied in the present invention is about 250 μm, and if the upper limit is exceeded, stable folding cannot be performed normally.

DESCRIPTION OF SYMBOLS 1 Folding device 2 Continuous paper 3 Conveying roller 4 Spiral 5 Spiral 6 Direction change part 7 Rotating roller 8 Belt 9 Center axis 10 Horizontal direction conveyor 11 Shooter Fm Mountain fold perforation Fv Valley fold perforation

Claims (2)

A shooter that discharges downward while swinging continuous paper,
A spiral portion composed of at least a pair of spirals for folding the continuous paper discharged from the shooter in a zigzag shape while moving downward;
In the folding device comprising a conveyor unit that changes the direction of the continuous sheet folded and discharged by the spiral unit in a substantially horizontal direction,
A continuous paper folding device, wherein a rotation roller is provided at a position in contact with a mountain folding portion of continuous paper discharged from the spiral portion. 2. The continuous paper folding apparatus according to claim 1, wherein the rotation rollers are provided in the vicinity of the left and right edges of the continuous paper.

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