JPS61119556A - Improved side lay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a printing method that allows continuous sheets, or board blanks, to be processed so that each side edge is placed in a precise relationship. Machines, folding machines, collating
) relating to machines, counting machines or cutting machines. In particular, it relates to the positioning of sheets of paper in a printing machine such that the printed image is positioned in precise and repeatable relation to one side, i.e. to one of the edges parallel to the direction or movement through the machine.

Prior Art The majority of conventional lateral register mechanisms involve stopping the sheet, releasing the forward drive mechanism, and applying a loose lateral force that pulls the sheet toward a fixed lateral stop. It is activated by When the material reaches the stop, its movement stops and a force must be applied to hold and press the material so that it is supported uniformly without twisting. The material is then prepared to enter the machine. This operation is a delicate operation requiring carefully calibrated mechanical equipment, especially at higher speeds and with considerable complexity. Since the seat has to decelerate, stop, and then accelerate again, there is a big problem with speed limits. It is particularly unsuitable in machines that do not require longitudinal registration and therefore have no other reason to stop the sheet.

OBJECTS OF THE INVENTION The present invention, a continuous feed sidelay mechanism, is applicable to other mechanisms in that it does not require more complex and expensive operation than feed (or lay) tables.

The present invention provides a method for directing the material onto a precise path while it continues to move in the drive direction (at any speed), as well as for the above.
er) A simple and uncomplicated mechanism that can be added, if necessary, to existing machines that do not have a mechanism and therefore rely on placing the material to be processed in a precise position and have limited accuracy. The purpose is to accomplish this by means equipped with the following.

DESCRIPTION OF THE INVENTION The present invention provides a sheet handling machine for use in a sheet handling machine comprising means for advancing a sheet, means for achieving lateral movement of the sheet during advancement of the sheet, and means for controlling the range of said lateral movement. Provide sideley. The sheet advancement means and/or lateral movement means are preferably actively driven means, such as one or more drive rollers. ``The term J actively driving means that the means referred to is provided with means for driving it. Alternatively, optionally guiding means, such as one or more idler rollers, are used. roller)
Reliability may be increased in the field of gravity by cooperative action with Preferably, the coefficient of friction between the advancing means and the sheet is greater for movement of the sheet in the advancing direction than for lateral movement. For lateral movement, it is preferable that the coefficient of friction between the lateral movement means and the seat is greater than the coefficient of friction between the advancement means and the seat.

More particularly, in the present invention, the sheet is attached to a feeder.
taken by er). The feeder may be a conventional suction (suct4on) feeder or a free running binoge (pi) that applies pressure to the drive roller (either above or below the sheet) and the drive roller.
nch) The leading edge of the sheet may be placed between the rollers. The sheet is thus pulled forward as a result of the friction between the drive roller and the sheet. During this movement, the pinch roller pushes the sheet sideways by cam-based means or other magnetic or fluid-based means. The relative friction between the drive roller and the material and the pinch roller two should be as follows:

(1) The material slides laterally on the drive roller while being positively gripped in the drive direction, 1'
Ru.

(2) The pinch roller slides laterally on the material,
Slides with greater friction than the drive roller on the material,
As a result, actively lI in the drive direction! It is being pulled further and further by the pinch rollers that it is holding.

When the pinch roller moves sideways in this way, it grips the sheet and still moves in the drive direction, while still allowing the sheet to move sideways. It is equipped with side stops (side 5 top) that limit the movement of the seat and control its final position. Further movement of the pinch rollers simply slides them against the material and no kinking occurs.

In order to provide the correct coefficient of friction, the drive rollers may be provided with a cursor or a groove. The friction of the rollers on the material is then greater in the drive direction than in the lateral direction. The pinch rollers may be provided with serrations as one means of limiting lateral frictional forces on the paper and preventing smearing.

Because it has a special surface, it can be used with materials that have a special coefficient of friction, or materials that have different surfaces on both sides.
Replaceable rollers may also be used.

If the feed machinery promotes changes in the plane of the material in the direction of drive while the material passes over or under the drive rollers, this creates a curvature in the material and makes the sheet stiffer. The material is therefore not dangerous or kinky and is susceptible to greater lateral forces.

Hereinafter, specific examples of the present invention will be described with reference to the accompanying drawings, taking the purpose of printing as an example. FIG. 1 is an isometric view of the entire device, and FIG. 2 is a cross-sectional view of FIG.

Here, two pinch rollers are shown on one drive roller.

The sheet material is advanced by a feeder (not shown) and is sandwiched between a drive roller (2) and a pinch roller (3). This is the transverse shaft (Lrans).
Continue sequentially on the arm (arssX4) attached to the verse 5hafLX5). roller(
3) is pushed towards the roller (2) by a spring (apringX 5 A) acting on the shaft (5) which is free to move in the axial direction.

Cam 7fCI can rollower (6)
is printing
cam (7) mounted on cylinderX8)
When the shafts (5) engage, move them sideways.
It is attached to the top. The cam is adjusted so that the movement occurs after the leading edge of the sheet is caught between the rollers (3), rather than before it reaches the cylinder (8).

When the above movement occurs, the shaft (5) and roller (3)
moves and pushes the seat (1) towards the fixed (adjustable) stop (9). The stop is very close to the material and prevents kinking at the top:l/(
Dobray 1- (109 guide plate) and bottom guide plate (boLtom guide
plate). The stop is made of hardened steel or a smooth, wear-resistant material such as ceramic and is fitted with a transverse bar for convenient and precise lateral adjustment.
barX23). Place a similar stop on the other end of the machine, cam (7A)
It may be attached to register one end of the sheet.

Once the lateral movement is complete, the rollers (3) must return to their original position. This can be done, for example, by extending the cam (7A) or by extending the return spring (13).
) is achieved by During the above return movement, the roller (
3) An additional cam (not shown) may be used to rotate the shaft (5) without pulling it from the roller (2). Return of the roller (3) is only allowed if the material is held by other means of maintaining its achieved position. For heavy standard papers or boards, the leading edge of the sheet itself may separate roller (3) and roller (2). For light gauge materials, the roller (3) will e.g. have the same force of 15
Alternatively, it may be lifted off the roller (2) by an additional cam (not shown).

Figure 2 shows how the guide plays (11) and (12) are placed to give the material a curvature. The curvature introduced in this way directs the sheet towards the cylinder (8) with the required tangent while stiffening the sheet laterally.

The drive roller (2) and the pinch roller (3) are both serrated but have different purposes. a
- In the case of the roller (2), the objective is to maximize the forward force of the material while minimizing the frictional resistance to lateral movement. In the case of the roller (3), serrations are used when the correct lateral friction value cannot be achieved depending on the material from which the roller is made, or when the value is subject to change due to accumulation of dust etc. in the material. It is a means of reducing directional friction.

Instead of solid rollers (2) and (3), the following means may be used: For example, the roller (2) may be replaced by a belt, preferably a pair of rollers and a heald. A larger contact area is thereby obtained. More specifically, roller (2) and/or
or (3) may consist of thin flexible discs placed side by side and spaced apart from each other. Lateral displacement of the material takes place through the bending of the disc without compromising the frictional forces between the disc and the material. If desired, the disc may be serrated.

In other embodiments, a suction mechanical device can also be used.

[Brief explanation of drawings]

FIG. 1 is an isometric view of the entire device of the embodiment. FIG. 2 is a sectional view of FIG. 1. The symbols in the figure are as follows. (1)...Sheet material (2)...Drive roller (3)/pinch roller (4)...Arm (5)
...Transverse shaft (5^)...Spring (6)...Cam foo a
War (7)...Cam (7^)...Cam (8)...Printing Linder (9)...
Stop (11)...Top guide plate (12)
)...Bottom guide plate (13)...Return spring (23)...Transverse bar Patent applicant Rotaprint public procedure amendment (self-imposed October 31, 1985)

Claims (1)

[Claims] 1. A sheet in a sheet handling machine comprising means for advancing the sheet, means for achieving lateral movement of the sheet during advancement of the sheet, and means for controlling the range of lateral movement. sideley. 2. The sidelay according to item 1, wherein the coefficient of friction between the advancing means and the sheet is greater with respect to movement of the sheet in the direction of travel of the sheet than with respect to lateral movement. 3. The sidelay according to item 1, wherein the friction coefficient for lateral movement between the lateral movement means and the sheet is larger than the friction coefficient for lateral movement between the advancing means and the sheet. 4. The sidelay according to item 1, wherein the sheet advancing means is an actively driven means. 5. The sideray according to item 1, wherein the advancing means includes a drive roller. 6. The sidelay according to item 1, wherein the advancing means includes a drive belt. 7. The sidelay according to item 1, wherein the lateral movement means for the seat actively drives the seat in the lateral direction. 8. The sidelay of claim 1, substantially as described with reference to the accompanying drawings. 9. A seat operating machine equipped with a sidelay according to any one of items 1 to 8. 10. The sheet handling machine according to item 9, wherein the sheet handling machine is a printing machine. 11. A method for lateral positioning of a sheet in a sheet handling machine, which comprises advancing the sheet, achieving lateral movement of the sheet during advancement of the sheet, and controlling the range of lateral movement. 12. The first using the device according to any one of paragraphs 1 to 8.
The method described in Section 1.