JP2006290626A - Front edge stopper for knife type folding unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knife type folding unit equipped with a front edge stopper, capable of certainly handling even a printed element having many problems, for example an extremely thin sheet-shaped printed element. <P>SOLUTION: The front edge stopper 100 for the sheet-shaped printed element 1 especially in the knife type folding unit, has at least one stopper surface 12 continuing from a center line to a side edge line of an extreme of the sheet-shaped printed element 1, on a front edge stopper supporting element 10. In the front edge stopper 100, guiding means 20, 25 structured to be suitable for lifting the front edge 3 of the sheet-shaped printed element 1 moving on a carrying flat surface 5 are disposed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The invention relates to a leading edge stopper for a sheet-like substrate, in particular in a knife-type folding unit, as described in the preamble of claim 1.

  In order to enable the folding of the signature carried by the conveying device to the knife-type folding unit as accurately as possible, a leading edge stopper and a side edge stopper are usually provided, whereby the signature is processed in a delayed process or Guided during the braking process and aligned along the coordinates given by the geometry of the folding knife. Known embodiments of knife-type folding units typically have a stopper support, which is adjustable by a motor, to which a stopper finger is fixed for entering between the conveying devices towards the conveying path of the signature. Often, it is provided in accordance with the minimum size of the signature to be processed. The knife-type folding unit of the folding machine is used, for example, in a so-called combination folding machine having at least one buckle folding machine and a knife-type folding machine, in particular for cross-folding.

  For example, Patent Document 1 discloses such a type of leading edge stopper in a knife-type folding unit. In this document, a leading edge stopper for braking the movement of the sheet conveyed so as to pass through the folding gap by the conveying device, and a side edge of the sheet to prevent vertical movement during the folding process. A knife-type folding unit is shown with a stopper. These stoppers that prevent vertical movement are housed in the leading edge stoppers and can be moved together, for example, to pull out of the folding gap in order to quickly eliminate the problem in the event of a misoperation.

  In particular, when the size of the signature to be folded is large and the substrate to be printed is thin, a plurality of stopper fingers fixedly provided with a space between the front edge stoppers may lead to the occurrence of marking. There is. In addition, since a reliable stopper edge is not formed with respect to the front edge of the signature, there is a case where the signature is inclined obliquely above the folding gap when the signature is strongly braked. Such twisting of the signature can cause folding inaccuracies.

  In order to prevent the occurrence of scouring as described above and to ensure reliable work progress in any format, folding machines currently in circulation should be folded after adjustment of the side stopper. Often, additional stopper fingers are manually attached depending on the size of the sword. If you want to move the side stoppers, you must immediately remove these additional stopper fingers again. In such a manner, automatic adjustment in particular considering the signature format is impossible.

  From Patent Document 2, a knife-type folding unit is known that is equipped with a transport device that transports a signature to a stopper support unit in a transport plane before the folding step. At least one leading edge stopper extending continuously from the position line of the folding knife to the extreme side edge line, movable substantially parallel to the conveying plane and substantially perpendicular to the conveying plane have. Depending on the material parameters and production parameters, the knife-type folding unit can be adjusted completely automatically.

In this case, however, it is difficult to reliably carry a particularly thin paper to the stopper. There is also a risk that the signature may pass under the stopper. Moreover, it may be a disadvantage that the signature hits the leading edge stopper only at a plurality of individual positions, as is the case with stopper fingers. In that case, especially when the paper is thin, it often leads to deformation of the signature unless the price of reducing the machine speed is paid. Therefore, it is desirable to improve the front stopper of the knife type folding unit in this respect.
US Pat. No. 5,158,524 European Patent Application Specification 1251095A2

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a knife-type folding unit having a leading edge stopper that can reliably handle even a problem printing body, for example, a very thin sheet-like printing body.

  This object is achieved by a leading edge stopper for a knife-type folding unit comprising the features of claim 1. Advantageous embodiments and developments of the leading edge stopper according to the invention are described in the dependent claims.

  According to this, the present invention relates to a leading edge stopper particularly for a sheet-like printed material in a knife type folding machine, and the leading edge stopper is continuous from at least the position line of the folding knife to the extreme side edge line. The front edge stopper support body has at least one stopper surface extending in the form of a front edge stopper, and the front edge stopper is configured to be suitable for lifting the front edge of the sheet-like printed material that moves on the conveyance plane. A plurality of guiding means are arranged. This guiding means ensures that the leading edge of the sheet-like substrate, particularly the leading edge of the signature, hits the leading edge stopper along its entire length. Thereby, the deformation as described above is prevented even when the machine speed is high.

  In a preferred embodiment of the leading edge stopper according to the invention, a plurality of guiding means are arranged along the width of the leading edge stopper, in particular between the conveying means for moving the sheet-like substrate to the leading edge stopper. Is arranged. The conveying means described above is usually a conveyor belt. The sheet-like substrate, especially the signature, hits the leading edge stopper of the present invention over its entire leading edge, so that other forms of leading edge stopper are required, as is the case with individual stopper fingers. No dependent changes are required. Thereby, the total setup time required when changing the format is significantly reduced.

  In another advantageous embodiment of the leading edge stop according to the invention, the guiding means comprise a deflecting member having an entry ramp that extends below the conveying plane. By the approach slope, the leading edge of the sheet-like substrate is moved out of the transport plane in a manner that is less damaging. The approach slope is preferably terminated at a distance of 12 to 22 mm from the leading edge stopper surface. As a result, the front area of the sheet-like substrate is again substantially perpendicular to the leading edge stopper surface on the deflecting member. Accordingly, the front edge of the sheet-like printed material is inclined with respect to the horizontal plane, so that it can be prevented from sliding on the front edge stopper. Furthermore, the upper surface of the baffle member is preferably chamfered in a region between the end of the approach slope and the front edge stopper surface, thereby preventing damage. By doing so, the leading edge of the sheet-like printed material when entering the vehicle does not hit an edge that may be caught. In addition, by doing so, the mounting area can be minimized. Furthermore, in the case of knife-type folding, it is considered that at least the outer edge of the sheet-like printing medium first changes the direction of movement by 90 ° when the center of the sheet-like printing medium enters between the folding rollers. Must-have. At this point, since the chamfered upper surface of the deflecting member still has only a slight frictional resistance, it is possible to prevent the sheet-like printed material from being damaged.

  In another advantageous embodiment of the leading edge stopper according to the invention, the guiding means comprise a blade extending in the transport direction below the transport plane of the sheet-like substrate, which blade is substantially It has an upper side in the horizontal direction. This blade is, for example, a thin thin plate having a substantially rectangular cross section, and preferably has an approach slope. As a result, the sheet-like printing medium is supported by the upper side of the blade even between the conveyor belts, so that the sheet-like printing medium is reliably conveyed. The upper side of the blade is coincident with the transport plane or slightly below it.

  In a development of this advantageous embodiment of the leading edge stopper according to the invention, the guiding means comprises a deflecting member (Abweiser) having an approach slope that reaches below the conveying plane, the approach slope of the deflecting member being the blade It extends to below the upper side. Thereby, it is guaranteed in any case that the sheet-like substrate is slid onto the deflecting member and thereby reliably fed to the leading edge stopper.

  In another advantageous embodiment of the leading edge stopper according to the invention, the leading edge stopper is configured to be movable in the vertical direction, in particular automatically movable. Thereby, the stopper and all components connected thereto can be moved out of the transport plane in a simple manner by means of a suitable drive, thereby freeing up the transport path.

  In another advantageous embodiment of the leading edge stopper according to the invention, the guiding means are arranged on the leading edge stopper by fitting. This ensures, on the one hand, a secure connection with the leading edge stopper, and on the other hand the guide means can be easily replaced, for example during maintenance work, or when the knife folding unit is not used. Can be moved from the outside.

  Next, embodiments of the present invention will be described with reference to the drawings.

  The drawings of the advantageous embodiment according to the invention of the leading edge stopper 100 with the guiding member 20 shown in FIGS. 1 and 2 are limited to the drawings of the components that form the main part of the invention. Other commonly known drive and / or guide means and cam disks and other parts of the electrical circuit or knife-type folding unit necessary for operating the device are only schematically illustrated, Explain only in general form.

  FIG. 2 shows a cross-sectional view of an embodiment of the leading edge stopper 100 according to the present invention. The guiding means 20 and 25 are arranged on the front edge stopper support 10 having the front edge stopper surface 12 by fitting, but are not fixed. The guiding means 20 and 25 are mainly composed of a deflecting member 20 and a blade 25. The baffle member 20 has a groove with which the leading edge stopper support 10 is engaged. The deflecting member 20 contacts the leading edge stopper surface 12.

  The central guiding means 20 and 25 are attached together with a guiding grid (not shown) which is well-known to those skilled in the art from the prior art and is accordion-like and can be adjusted to the width on the side. Along the groove 23 of the leading edge stopper support 10, together with the guide grid, the side support 30, and the side conveyor belt (not shown) known from the prior art to a person skilled in the art Slide horizontally. In addition, the knife-type folding unit also has a further conveyor belt which is arranged in the vicinity of the folding knife and which is fixed to the machine. Depending on the dimensions of the sheet-like printed material 1, the use of the central guiding means 20 and 25 can be partially or completely stopped. It is preferable that the upper side of each of the guide grid, the support 30 and the conveyor belt described above is on the transport plane 5.

  The deflecting member 20 has an approach slope 21. The approach slope 21 is seen in the transport direction T relative to the transport plane 5 of the sheet-like substrate 1, particularly the signature 5, which enters the transport direction indicated by the symbol T. Thus, they are arranged to start below the transfer plane 5 and end in a state offset by a height difference H above the transfer plane 5. In the illustrated embodiment, the height difference H, that is, the distance between the baffle member upper surface 22 and the transport plane 5 is on the order of 1 to 2 mm. Here, the conveyance plane 5 means the lower surface of the sheet-like printed material 1 that is the signature 1 in particular.

  Therefore, the leading edge 3 of the sheet-like printing medium 1 is lifted from the transport plane 5 by the approach slope 21. The approach slope 21 ends at a labor distance D from the leading edge stopper surface 12, which is on the order of 10 to 22 mm in the illustrated embodiment. As a result, the front edge of the sheet-like substrate 1 hits the front edge stopper surface 12 at a right angle and over the entire width. As a result, the sheet-like printing medium 1 is very effective and softly stationary. Such a stop is further promoted by trailing edge stopper means (not shown).

  As shown in FIG. 1, the upper surface 22 of the deflecting member of the central guiding means 20, 25 is chamfered laterally with respect to the transport direction T. As a result, the mounting area of the sheet-like printed body 1 on the deflecting member 20 is reduced, thereby preventing the sheet-like printed body 1 from becoming distorted. Furthermore, by doing so, the edge portion does not get out of the way.

  Below the central baffle member 20 is disposed a blade 25 having a chamfered corner and also having an entry ramp 26 that starts clearly below the conveying plane 5, ie a substantially rectangular thin plate. The upper side 27 of the blade 25 coincides with the transport plane 5 or slightly below it. Thereby, the blade 25 serves as a support for the sheet-like printed body 1 between conveyor belts (not shown) well known to those skilled in the art, which carry the sheet-like printed body 1 to the leading edge stopper 100. . In the transition from the blade 25 to the deflecting member 20, the entry slope 21 of the deflecting member protrudes below the upper side 27 of the blade on both sides of the blade 25. Both parts of the approach slope 21 arranged on both sides of the blade 25 merge on the blade 25 to form a common deflecting member surface. In some areas of the leading edge stopper 100, rather than surrounding the blade 25, slightly different configurations of the baffle members 20, which are arranged on both sides of the support 30, are arranged on both sides. These deflecting members 20 also have similar approach slopes 21 and grooves 23. For example, a conveyor belt is supported on the support, or the above-described guide lattice is attached.

  In the extreme edge region of the front edge stopper 100, a side edge stopper 40 having an approach slope 41 is disposed. The side edge stopper 40 preferably has an invariable positional relationship with respect to the adjacent support body 30 and slides with the support body in accordance with the dimensions of the sheet-like printed body 1.

  The leading edge stopper support 10 can move up and down in the direction of motion marked 14. This motility of the leading edge stopper support 10 is to move the leading edge stopper support 10 out of the transport plane 5 when not in use, i.e. when the sheet-like printed material 1 is not subjected to knife folding, for example. Used for

  The leading edge stopper 100 according to the invention is particularly advantageous for use in a knife-type folding unit, in particular a so-called combination folding machine, or the sheet-like substrate 1 is stopped and aligned by its leading edge 3. It is also conceivable to use other devices for handling the sheet-like printed material 1, for example, for punching.

FIG. 6 is an isometric view showing an embodiment according to the present invention of a leading edge stopper with a guiding member. It is sectional drawing which shows embodiment by this invention of a front edge stopper provided with a guide member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet-like to-be-printed body 3 Front edge of sheet-like to-be-printed body 5 Conveyance plane 10 Front edge stopper support body 12 Front edge stopper surface 14 Movement direction of front edge stopper support body 20 Bending member 21 Approaching slope 22 Bending member upper surface 23 Groove 25 Blade 26 Blade entrance slope 27 Upper blade 30 Support 40 Side edge stopper 41 Entrance slope 100 Front edge stopper D Distance between the edge of the entrance slope and the front edge stopper surface H Between the upper surface of the deflecting member and the conveyance plane Height difference T Transport direction

Claims (10)

The front edge stopper support body (10) has at least one stopper surface (12) continuous from at least the center line of the sheet-like printing medium to the extreme side edge line, particularly in a sheet form in a knife type folding unit. In the leading edge stopper (100) for the substrate (1)
The leading edge stopper (100) includes a plurality of guiding means (20) configured to lift up the leading edge (3) of the sheet-like printed material (1) moving in the transport plane (5). 25) is arranged, a leading edge stopper for a sheet-like printed material.   The plurality of guiding means (20, 25) are arranged along the width of the leading edge stopper (100), and in particular, the sheet-like printed material (1) is moved to the leading edge stopper (100). The leading edge stopper according to claim 1, wherein the leading edge stopper is disposed between conveying means to be moved.   2. The guide means (20, 25) according to claim 1, wherein the leading edge (3) of the sheet-like substrate (1) is lifted from the transport plane (5) by 1 to 2 mm. The leading edge stopper described.   The leading edge stopper according to claim 1, wherein the guiding means (20, 25) includes a deflecting member (20) having an approach slope (21) reaching below the transport plane (5).   The leading edge stopper according to claim 4, wherein the approach slope (21) ends at a distance of 12 to 22 mm from the leading edge stopper surface (12).   The front edge stopper according to claim 1, wherein the upper surface (27) of the deflecting member (20) is chamfered in a region between an end of the approach slope (21) and the front edge stopper surface (12). .   The guide means (20, 25) includes a blade (25) extending in the transport direction (T) below the transport plane (5) of the sheet-like printed material (1). 25. A leading edge stopper according to claim 1, wherein 25) has a substantially horizontal upper side (27).   The guiding means (20, 25) includes a deflecting member (20) having an approach slope (21) reaching below the transport plane (5), and the approach slope (21) of the deflecting member (20). The leading edge stopper according to claim 7, which extends below the upper side (27) of the blade (25).   2. A leading edge stopper according to claim 1, wherein the leading edge stopper support (100) is configured to be movable in the vertical direction, in particular automatically movable.   The leading edge stopper according to claim 1, wherein the guiding means (20, 25) are arranged on the leading edge stopper support (10) by fitting.

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