JP2009512605A - Intermediate adjustment module for dimension measuring machine - Google Patents

Abstract

The invention relates to an apparatus for measuring the dimensions of a cut paperboard blank (2, 2 ') comprising a high speed (1.4V) discharge means and a low speed (V ") receiving means of a cutting machine. A blank drive speed is adjustable, and an intermediate adjustment module (II) disposed between the discharge device (I) and the receiving means (III) is provided.
[Selection] Figure 2

Description

  The present invention relates to an apparatus intended to allow stacking of printed and cut paperboard blanks at high speed.

  Machines that print and cut paperboard blanks are required to work at higher and higher speeds, and the designers of this machine are faced with a number of technical issues regarding both printing and stacking these paperboard blanks. It is known that

  With regard to stacking, it is known that printed blanks, after cutting, form scales, i.e., partially stacked and collected together. In order to do so, the blanks from the cutting module of the printing press at a predetermined nominal speed are moved towards the discharge module which accelerates the blanks so that they separate. The blanks are then passed to the receiving module, which moves at a low speed, so that they are partially stacked on the blanks previously placed on the conveyor of the receiving module.

  With a machine with a nominal speed in the range of 200 m / min, the transfer of the paperboard blank from the discharge module to the receiving module takes place without any particular difficulty. However, if higher speeds are required, for example on the order of 350 m / min, a somewhat random phenomenon occurs that prevents proper stacking of blanks. It is therefore impossible to place each blank on the preceding blank with sufficient accuracy and reproducibility to eliminate certain problems.

  A leading blank or projection blank that will superimpose itself on the receiving blank represents the offset distance or overlap of the blank on the surface of the receiving blank that is already flat. It is known that over a certain distance causes the projection blank to slide forward and is shown to have a certain projection angle. However, some cut-out paperboard blanks are intricately shaped with some parts, especially for packing, such as protruding outside to protect the flaps, which is a certain moment during the sliding movement It is known that the leading edge of the projection blank is received at one of these protruding portions of the receiving blank, which creates a disorder that usually requires an emergency stop of the conveyor line.

  Therefore, if it is desired to eliminate the potential dangers mentioned above, it is essential that the projection blank can be accurately and reproducibly placed on the receiving blank before any such risk is involved. It is.

  Also, if the blank is crumbly applied, such as some paint or gold finish, the arrival of the projection blank at a relatively high speed and in certain projections in the receiving blank will form marks in the latter receiving blank. Moreover, it is known that a projection blank is received between two components having the same peripheral speed, namely a lower conveyor belt and an upper “overlapping wheel”. However, it has been determined that when the speed of the projection blank is much faster than the peripheral speed of the superimposed wheels, this leaves a mark on the blank. Of course, these different marks are detrimental to the nature of the blanks and they just have to be discarded. It is therefore of utmost importance to use means that can maintain the integrity of the paperboard blank.

  It is also known that the movement between the discharge module and the receiving module is made with a constant projection angle between these directions, which is attached to a prior art machine. However, in the present invention, in order to apply the maximum nominal speed for the machine, this angle is adjusted with respect to a certain number of constant parameters of the paperboard blank, such as in particular its length, its stiffness and its thickness. It is confirmed that there is a need.

  The object of the present invention is therefore able to overcome these drawbacks and meet these new demands, in particular when avoiding damage to the projection blank during its movement, at high nominal speeds. An apparatus is proposed which is able to achieve an accurate and reproducible arrangement of the projection blank on the receiving blank.

  The subject of the present invention is therefore an apparatus for achieving the superposition of a cutting and paperboard blank consisting of cutting and / or high speed discharging means and low speed receiving means of a printing press, which is arranged between the discharging means and the receiving means, It comprises an intermediate adjustment module capable of adjusting at least the blank drive speed.

  According to one advantageous embodiment, the intermediate adjustment module is preferably an applicator that can fold the back part of the paperboard blank after discharge into the discharge module and lower it below the level of arrival of the following blank Consists of means. In this way, this subsequent blank will certainly find a way to clarify when it arrives at the intermediate adjustment module.

  These applicator means may consist, for example, of an air stream blowing air over the back of the blank, or they can ride on mechanical means, in particular each back of the blank, over at least a portion of the blank travel distance. A rotating element with a cam forming part with positive movement of the latter blank may also be used.

  Preferably, the paperboard blank passages provided at the outlet of the discharge module form a projection angle in the passages of these blanks of the intermediate adjustment module. The intermediate adjustment module conveniently comprises means for adjusting this projection angle.

  The average moving speed of the blank in the intermediate adjustment module is, for example, approximately the average of the speed of the projection blank exiting the discharge module and the speed of the receiving module. If the nominal moving speed V of the machine at the exit of the discharge module is 1.4V, for example, and the moving speed V ″ of the receiving module is 0.1V, the moving speed V ′ of the intermediate module is on the order of 0.6V. With regard to the desired degree of stacking, the user can therefore adjust the speed value on either side of this average speed.

  The present invention is concerned that the intermediate adjustment module can be easily adapted to existing machines for their improvement, as long as all that is required is to add an intermediate adjustment module between the discharge module and the receiving module. is there.

Aspects of the various aspects of the invention are described below by way of non-limiting examples with reference to the accompanying drawings.
FIG. 1 shows a printed and cut-out example paperboard blank 2 intended to form a box with a length f, which has a constant peripheral side P. FIG. This blank has a fold line 4 to form a fold line which is then used to assemble the box. The paperboard blank 2 also has a notch 3 that defines a tab 5 for holding together and ensuring box integration after folding.

  The superposition operation consists in producing a blank which becomes partly superposed with a constant superposition R corresponding to the length of the receiving blank 2 ′ covered by the projection blank 2. In the remainder of this, it is preferable to refer to the concept of non-overlapping NR, which conversely indicates the length of the blank 2 ′ not covered by the projection blank 2. Non-overlapping corresponds to a non-overlapping speed δ corresponding to the length of the uncovered blank, and means δ = NR / f.

  During the overlaying operation, the projection blank 2 slides over the upper surface of the receiving blank 2 ', and during this movement, if its front face encounters a protruding part of the receiving blank, this requires stopping the entire moving line. It will cause disturbances that could cause possible failures.

  FIG. 2 schematically illustrates a printing and / or cutting machine consisting of a discharge module I, an intermediate adjustment module II, a receiving or superposition module III at its outlet.

  The function of the discharge module I is to separate the paperboard blank 2 printed and cut out at the nominal speed V of the machine by its printing and cutting module, not shown in the drawing. In order to do so, the discharge module I accelerates the blank 2 to e.g. increase it to about 40%, i.e. to a speed of 1.4V. As shown in FIGS. 2 and 3, the blanks 2 arriving at the outlet of the discharge module I are thus spaced from each other up to a distance d. In the prior literature, these blanks were quickly moved to the overlay module III.

  According to the invention, the blank 2 is moved from the discharge module I to the intermediate adjustment module II. For this purpose, the movement surface (or path) T1 of the projection blank 2 exiting the discharge module I forms an angle i of about 15 ° with the blank movement surface T2 in the intermediate adjustment module II. This allows the front face of the projection blank 2 to slide over the preceding blank, ie the receiving blank 2 ', which is already in a flat position on the moving surface T2 in the intermediate adjustment module II. Receipt of the projection blank 2 takes place between the upper overlapping wheel 6 and the lower conveyor belt 7 which have the same peripheral speed V ′ and also block the projection blank 2 by transmitting their speed to the projection blank 2.

  In relation to the difference existing between the speed of the projection blank 2 (1.4 V in the chosen embodiment) and the speed V ′ of the receiving blank 2 ′, the blanks 2, 2 ′ have more or less non-overlapping NR. This will be clearly understood. For example, if the receiving blank 2 'is equal to the nominal speed of the machine, ie V, the projection blank 2 will take its own position so that it just touches the receiving blank 2' and ( If the non-overlay is NR = f, and the non-overlay speed is δ = 1), the speed V ′ of the receiving blank 2 ′ is thus the nominal speed V to achieve the superposition. You have to be slower. Of course, in these conditions, the non-overlapping value NR of the receiving blank 2 'by the projection blank 2 can be adjusted by adjusting the speed V' of the blank 2 'in the intermediate adjustment module II.

  Also, the non-overlapping speed δ is equal to the difference in relative movement speed between the intermediate adjustment module II and the nominal speed V of the machine, ie δ = V ′ / V.

  According to the invention, means are provided which can be used to adjust the moving speed V ′ of the receiving blank 2 ′ which allows the intermediate adjustment module II to adjust the non-overlapping speed δ to the desired value. .

  Thus, according to the present invention, the intermediate adjustment module II guarantees several functions. First of all, by reducing the speed difference that exists between the projection blank 2 and the receiving blank 2 ', this reduces the effects of random phenomena that occur during the overlay operation. However, it allows for precise positioning of the projection blank in the receiving blank and avoids inadvertent marks on the projection blank.

  Subsequently, the adjustment function of the non-overlapping speed δ is ensured, and this causes the projection blank 2 to be moved before the risk of one of the front edges of the projection blank 2 coming into contact with the tab of the receiving blank 2 ′. It is carried on the receiving blank 2 'and makes it possible to block the overlay.

  The passage of the blank 2 'from the intermediate adjustment module II to the receiving module III is the speed of each of these modules, which provides a guarantee that the positioning is correct and the non-overlapping new, final speed δ' will be exact. The same is done with a small difference between V ′ = 0.6 m / min and V ″ = 0.1 m / min in the examples.

  Preferably, according to the present invention, as shown in FIG. 2, on the entrance side of the intermediate adjustment module II, as soon as the rear part of the paperboard blank 2 exits the discharge module I, the rear part of the paperboard blank 2 is rapidly folded. Means that can be used are used, so that a newly arriving projection blank (this arrival occurs at level N) cannot lead to a collision with an already arriving blank. This means is illustrated in FIG. They can be of any type, in particular consisting of a rotating cam, which, when it passes, will ride on the back of the blank and it will arrive the next blank Bring it down in a clear way until it comes under level N.

The intermediate adjustment module II can therefore be used as:
a) Stabilize and accurately position the projection blank at the receiving blank of the machine at a high nominal speed V.
b) To accurately adjust the overlay R (or non-overlay NR) of the projection blank in the receiving blank.
c) If necessary, adjust the projection angle i of the path T1 of the projection blank 2 and the path T2 of the receiving blank 2 '.
d) If the blank overlay R is to be more accurate, reduce the distance d of the blank exiting the discharge module I and thereby reduce the speed of the blank exiting this module.

It is a top view of the projection blank which has overlapped with two paperboard blanks in a middle adjustment module and a receiving blank. FIG. 3 is a schematic diagram of a discharge module, an intermediate adjustment module, and a receiving module that ensures receiving and superposition. FIG. 6 is a schematic diagram showing the relative position of a paperboard blank exiting the ejection module during the intermediate adjustment module and the receiving module.

Explanation of symbols

2 2 'paperboard blank 3 notch 4 fold line 5 tab 6 wheel 7 conveyor belt
I Discharge means
II Intermediate adjustment module
III receiving means δ non-overlapping speed f length d distance i angle F applicator means V V ′ speed V ″ low speed receiving means N blank arrival level NR non-overlapping R superposition T1 T2 path

Claims (7)

  A device for superposing cut out paperboard blanks (2, 2 ') comprising a high speed (1.4V) discharge means (I) and a low speed receiving means (V ") of a cutting and / or printing machine, wherein the discharge means ( Device arranged between II) and receiving means (III), characterized in that it comprises at least an intermediate adjustment module (II) in which the drive speed of the blank can be adjusted.   The intermediate adjustment module (II) can fold the rear of the paperboard blank (2) after the paperboard blank (2) exits the discharge module (I), to a level below the arrival level (N) of the next blank 2. Device according to claim 1, characterized in that it comprises applicator means (F) capable of lowering the paperboard blank (2).   Applicator means (F) provide a cam-forming zone in which the cam-forming zone rides on each rear part of the blank (2) and reliably entrains the blank over at least part of its travel distance. 3. The device of claim 2, comprising a rotating element.   The path of the paperboard blank delivered to the exit of the discharge module (I) forms the projection angle (i) with the path of these blanks in the intermediate adjustment module (II), the latter intermediate adjustment module (II) 4. The apparatus according to claim 1, further comprising means for adjusting a corner.   The apparatus according to claim 2 or 4, wherein the projection angle is in the vicinity of 15 °.   2. The nominal driving speed (V ′) of the intermediate adjustment module (II) is approximately in the middle of the difference in outlet speed from the discharge module (I) and the receiving module (III). Any device up to 5.   7. A device according to claim 1, wherein the speed of the blank from the discharge module is 40% greater than the nominal speed (V) of the machine.

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