JP2001151399A - Sheet winding preventing mechanism in pressure roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet winding preventing mechanism in a pressure roller capable of certainly preventing winding of a sheet without causing dirt or break of the sheet. SOLUTION: The pressure roller 17 transfers the sheet and simultaneously applies pressure with a pair of vertical rollers 17a, 17b. On the rear stage side of a sheet transfer passage of at least one roller 17b, the winding preventing sheet 18 comprising synthetic resin having flexibility is arranged so as to contact with the peripheral surface of the roller 17b, and the contact end surface is formed in a crest shape. The sheet 18 contacts with the peripheral surface of the roller at its central part in the axial line direction of the roller 17b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure roller for applying pressure to a sheet by a pair of upper and lower rollers while transferring a single piece of paper or a continuous sheet. For preventing paper entanglement for use.

[0002]

2. Description of the Related Art In a pressing roller for applying pressure to a sheet by a pair of upper and lower rollers while transferring a single sheet or a continuous sheet, if the sheet adheres to the roller and gets entangled, the sheet may be damaged or jammed. Therefore, it is necessary to prevent the paper from being entangled. In the related art, a metal or resin plate-shaped blade generally called a doctor blade is arranged so as to be in contact with the peripheral surface of the roller over substantially the entire length thereof, and the doctor blade prevents the paper from being caught.

[0003]

However, according to this conventional example, when the paper comes into contact with the doctor blade, there is a disadvantage that the paper cannot be surely peeled off from the rollers and the paper may be jammed. .

[0004] The present invention eliminates such inconveniences,
It is an object of the present invention to provide a paper entanglement prevention mechanism in a pressure roller which can prevent the paper from being entangled or damaged and can surely prevent the entanglement of the paper.

[0005]

In order to achieve this object, a mechanism for preventing paper entanglement in a pressure roller according to claim 1 of the present invention applies pressure to a sheet by a pair of upper and lower rollers while transferring the sheet. In the pressure roller to be applied, a flexible sheet member is disposed in front of at least one of the rollers in the sheet transport direction so as to contact the peripheral surface of the roller.

According to another aspect of the present invention, there is provided a pressure roller configured to prevent a sheet from being entangled in a pressure roller, wherein the sheet member according to the first aspect has an angled end surface that comes into contact with the peripheral surface of the roller. The roller is formed so as to contact the peripheral surface of the roller at the central portion in the axial direction of the roller.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments in which the present invention is applied to a paper bonding apparatus will be described below in detail with reference to the accompanying drawings. Here, FIG. 1 is a front view schematically showing the whole, and FIG. 2 is a perspective view schematically showing a main part.

First, the paper bonding apparatus will be described. As shown in FIG. 1, a paper folding device 4 for continuously folding three continuous papers P <b> 1 can be attached to and detached from a mounting portion 3 of the body 2 of the paper bonding device 1 with a tension bar 5 having a U-shaped planar shape. Is provided. The tension bar 5 is provided with a paper mounting table 6 on which the continuous paper P1 is folded in a zigzag shape at a horizontal perforation, which is a folding and cutting perforation, and a pair of support arms 7, 7. It is engaged and supported by a hook-shaped engaging portion (not shown) provided at the upper end.

Although not shown, the continuous paper P1
Has two parallel perforated vertical perforations and a pair of marginal portions provided with a large number of marginal holes on both sides in the width direction, and a large number of single piece sheets P2 are connected via horizontal perforations. When a predetermined pressure is applied to each superimposed surface of the continuous paper P1, the adhesive can be adhered, and after applying the adhesive, a pressure-sensitive adhesive that can be peeled off is applied, and predetermined information is printed on the superposed surface. On one side, predetermined information is printed. .

Above the sheet folding device 4, a continuous sheet P1
A guide plate 8 for guiding the continuous paper P1 is provided on the body 2 and a pair of right and left tractors 9 for pulling out and transporting the continuous paper P1 are provided with pins for fitting the marginal holes of the continuous paper P1. Have. A marginal slitter 10 for cutting the marginal portion of the continuous paper P1 is provided near the leading end of the tractor 9 in the transport direction, and the cut marginal portion is stored in a marginal storage portion 11.

Following the marginal slitter 10, in order to cut the superposed continuous paper P1 into single-piece paper P2,
A pair of upper and lower in-feed rollers 12 rotating at a low speed and a pair of upper and lower high-speed rollers 1 rotating at a high speed for applying tension to the continuous paper P1 by a difference in transport speed.
3 is provided. Between the in-feed roller 12 and the high-speed roller 13, a blade 14 that abuts on a perforation of the continuous paper P1 and cuts each single-sheet paper P2.
Is provided, and on the rear side of the high-speed roller 13,
A transport belt 15 for transporting the single-sheet paper P2 and an idle roller 16 are provided.

A pressure roller 17 comprising a pair of upper and lower rollers 17a and 17b for applying a pressure, which is a condition for bonding the superposed surface to the single piece of paper P2, is provided after the conveyor belt 15 and the idler roller 16. On the downstream side of the lower pressure roller 17b in the sheet transfer path, an entrainment prevention sheet 18 as a sheet member made of a flexible synthetic resin is arranged so as to contact the peripheral surface of the lower roller 17b.

As is apparent from FIG. 2, the entrainment preventing sheet 18 has an end face which is in contact with the peripheral surface of the lower roller 17b in a mountain shape, and has a central portion in the axial direction with respect to the peripheral surface of the lower roller 17b. It is fixed to a fixed plate 20 also serving as a doctor blade via a spacer 19 made of an elastic material such as urethane so as to be in contact therewith.

As shown in FIG. 1, a conveyor sticker 21 is provided following the pressure roller 17. The conveyor stacker 21 includes a stopper 22.
The single-sheet paper P2 is transported toward, and the single-sheet paper P2 is sequentially stacked and accumulated.

Next, the operation of the above embodiment will be described. When a start switch of a drive motor (not shown) is turned on in a predetermined state in which the continuous paper P1 is set on the tractor 9 so that one of the surfaces on which information is printed is on the lower side, the continuous paper P1 is turned on. Is transported by a tractor 9, the marginal portion is cut and removed by a marginal slitter 10, and further transported through an infeed roller 12 toward a high-speed roller 13.
The cut marginal part is stored in the marginal storage part 11.

The continuous paper P1 is fed to the infeed roller 12
When the tension is applied by the transfer speed difference, the blade 14 abuts on the horizontal perforation of the continuous paper P1, breaks the horizontal perforation, and the continuous paper P1 becomes a single piece of paper. It becomes P2.

The single piece of paper P2 is transported by the transport belt 15, passes through the idle rollers 16 and reaches the pressure roller 17, where a predetermined pressure is applied from above and below, and the overlapping surface is pressed. The unit paper P2 on which the overlapping surface is pressed
Is transferred to the conveyor stacker 21. When the single sheet P2 passes through the pressure roller 17, the information is printed on the lower surface of the single sheet P2. The single-sheet paper P2 is moved by the lower roller 17
It may adhere to the peripheral surface of b and get caught.

When the single-sheet paper P2 entrained by the lower roller 17b reaches the entrainment-preventing sheet 18, the tip of the entrainment-prevention sheet 18 is set to the single-sheet paper P2.
And the single-sheet paper P2 adhered to the peripheral surface of the lower roller 17b is peeled off, and the single-sheet paper P2 is transported to the conveyor sticker 21 without fail. Here, since the sheet 18 for preventing entanglement is fixed to the fixing plate 20 via the spacer 19, the single piece of paper P2 does not come into contact with the fixing plate 20 to be stained or damaged. Then, the single-sheet paper P2 transferred to the conveyor stacker 21 is sequentially stacked on the conveyor stacker 21.

The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the sheet 18 for preventing the entanglement may
7b, only the upper and lower rollers 17a,
17b. The sheet 18 for preventing entanglement is preferably provided on the pressure roller 17 corresponding to at least the printing surface of the single piece paper P2 or the continuous paper P1 in the pressure roller 17. Further, the entanglement preventing sheet 18 may be fixed to an appropriate member other than the fixing plate 20 also serving as a doctor blade.
Further, a plurality of pressure rollers 17a and 17b may be provided, and the pressure rollers 17a and 17b are not limited to pressure bonding. Further, in the above-described embodiment, the paper bonding apparatus 1 is described as an apparatus that folds the continuous paper P1, cuts and presses the continuous paper P1, but the paper bonding apparatus to which the present invention is applied is already a single piece. It is also possible to use a device that folds a sheet of paper and presses it.

[0020]

As described above, according to the mechanism for preventing the paper from being entangled in the pressure roller according to the first aspect of the present invention,
By arranging the flexible sheet member so as to be in contact with the peripheral surface of at least one of the rollers, it is possible to prevent the sheet from being stained or damaged and to reliably prevent the sheet from being entangled.

According to the second aspect of the present invention, a sheet member having flexibility is formed such that the flexible sheet member has an angled end surface in contact with the peripheral surface of the roller. Since the roller is configured to contact the surface at the central portion in the axial direction of the roller, the above-described effect according to the first aspect of the present invention can be further improved.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing the whole;

FIG. 2 is a perspective view schematically showing a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper bonding apparatus 17 Pressure roller 17a Upper roller 17b Lower roller 18 Entrapment prevention sheet 19 Spacer 20 Fixing plate P1 Continuous paper P2 Single piece paper

Claims (2)

[Claims] 1. A pressure roller for applying pressure to a sheet by a pair of upper and lower rollers while transferring the sheet,
A sheet roll-in prevention mechanism for a pressure roller, wherein a flexible sheet member is arranged at a stage subsequent to a sheet transfer path of at least one of the rollers so as to contact a peripheral surface of the roller. 2. The sheet member according to claim 1, wherein the sheet member has an end surface in contact with the peripheral surface of the roller in a mountain shape, and contacts the peripheral surface of the roller at a central portion of the roller in the axial direction. A mechanism for preventing paper entanglement in the pressure roller.