EP2886361A1 - Method and device for producing desk calendars - Google Patents

Abstract

The present invention relates to a device for the production of desk calendars. In order to develop a device for the production of table calendars with two-piece back to the effect that cost benefits can be developed, it is proposed that in a bound unit (2) with in working position upwards back (4) an upper back (4a) against a lower back (4b) is raised, a tab (9) externally coated at two opposite locations with adhesive and inserted between the upper back (4a) and the lower back (4b) and the upper back (4a) placed on the lower back (4b) becomes.

Description

The present invention relates to an apparatus and a method for the production of desk calendars and similar products having a stand or stand.

From the prior art diverse designs of differently bound desk calendars are known, the leaves are provided for tearing or turning. As a fundamental principle of a widespread design of a desk calendar for turning over can be deduced that in addition to a so-called. Core are provided with the actual calendar sheets also acting as a table stand or uprights back and a cover sheet. These components are connected to each other via a common and in use position arranged above binding, which is performed regularly as a ring bond. With respect to known types of desk calendars is fully on the DE 693 35 83 U directed.

In desk calendars of the type mentioned, the back is executed in one piece double-layered with defined material weakening to form bending seams. In this case, both free ends of this double-ply folded back are covered by an idR normally executed as a spiral or so-called. Wire-O binding. This back has in an initial position at regularly coinciding with the core width an additional, one-sided projecting length, which is arranged opposite the binding. To set up a substantially prismatic body is formed by the back or by the corresponding bending of parallel bending bends, ie a body with triangular cross-section and with a rectangular base and open end faces. This made of cardboard o-the Cardboard formed back body is also referred to as a post.

In the EP 2607092 A1 the Applicant has proposed a weight-reduced and material-efficient alternative with a corresponding production method compared to known arrangements. For such a desk calendar two cardboard backs are provided which are connected together by a plastic splint to an A-shaped stand or stand or stand. As a split pin is a known elongated plastic part used with T-shaped ends, which is inserted through a sapwood hand gun as a standard tool through punched holes. Both methods, as well as a device in the form of such a stand for calendars have proven in principle.

It is the object of the present invention to develop a device and a method for the production of table calendars with two-piece back to the effect that cost advantages can be developed.

This object is achieved by a method for producing table calendars with a core and a two-piece back part and a binding connecting the back parts and the core, wherein the back parts are joined together to form an A-post, with the features of claim 1 In a bound unit with the back up in the working position, an upper back is raised against a lower back, a flap is coated with adhesive and placed between the upper back and lower back and the upper back is placed on the lower back. So it is the two cardboard backs connected to an A-shaped "upright" or stand or stand by gluing a tab between the two backs which consists of a paper strip in a particularly preferred embodiment of the invention. This achieves a further uniqueness of the entire desk calendar, which is advantageous in particular in the case of recycling in the course of a recycling process and entails cost advantages.

A device with the features of claim 12 represent a solution to the above problem. Advantageous developments are the subject of the respective subclaims. Thus, the tab is made by folding a substantially V-shaped paper strip. Alternatively, other folds are possible, such as e.g. an M- or W-shaped fold, which have a leporello-like folded intermediate piece compared to a V-fold. The paper strip is, however, withdrawn from a supply in each of the aforementioned cases, wherein the supply is designed in particular as a roll-shaped endless storage. Subsequently, the folded paper strip of a specification of a current production of A-stands for desk calendars or similar. according to the respective specification.

Advantageously, the tab is transported from a folding and cutting position via an adhesive application to positioning on the lower back by a conveyor. In particular, the tab is pulled under clamping between two rubberized conveyor belts or conveyor belts in the conveyor, transported and positioned. Thus, the handling of the tab is much easier, even if different positions must be run through.

In a particularly preferred embodiment of the invention, the coating of the tab is externally applied at two substantially opposite locations with an adhesive performed, preferably waiving solvent by using, for example, a hot melt adhesive, which also has the fundamental advantage of rapid solidification. The coating of the tab with adhesive is preferably carried out contactless as a defined order of the hot melt adhesive via at least two nozzles. In this case, the hot melt adhesive is applied in the form of a thin film on opposite outer sides of the tab, which subsequently glued by positioning or inserting between the back parts each with one of the backs.

In one embodiment of the invention, a sucker is advantageously used to selectively lift the upper back. Due to a regionally limited negative pressure, only the upper back part is raised slightly. Subsequently, the upper back part is further raised in a defined manner, in particular by a pneumatic lifter or a substantially triangular rising ramp, until an over-center position of the upper back part has been reached. Thus, an unintentional collapse is safely excluded in both cases, the lower back safely together with the core remains on the conveyor belt.

Preferably, the upper back is placed after the insertion of the adhesive tab on the lower back, to which in turn a triangular rising ramp and / or a press roller is used. However, at least in the region of the tab is pressed to ensure adhesion of both backs with the tab.

In a preferred embodiment of the invention, a final test of each unit is realized by raising the upper back part, in particular by placing it in between before folding the back pieces together Part of a lift. Only by a correctly connected to the back parts tab then the lower back part is raised so far that a particular arranged on a spring plate optical fork sensor is actuated. Otherwise, the lower back part remains on the core, so that the optical sensor would not be operated without interruption of an optical barrier between forks of the spring plate. This is a faulty adhesion of a tab and thus a subsequently auszusondernendes as defective product recognized as a committee.

Figur 1:

eine perspektivische Darstellung einer erfindungsgemäßen Vorrichtung in einem Produktionsprozess mit Blick in Transportrichtung mit bereits gebundenen Einheiten aus Kern und einem zweistückigen Rücken in unterschiedlichen Produktionsstadien;

Figur 2:

eine perspektivische Darstellung analog Figur 1 mit Blick entgegen der Transportrichtung zur Darstellung insbesondere eines Bereiches um eine Transporteinrichtung für Laschen;

Figur 3:

eine Ausschnittsvergrößerung von Figur 2;

Figur 4:

eine perspektivische Darstellung analog der vorangehenden Figuren im Wesentlichen senkrecht entgegen der Transportrichtung zur Darstellung abschließender Produktionsschritte einschließlich eines End-Tests und

Figur 5:

eine vergrößerte Ansicht des Bereichs D mit Einrichtungen durch Durchführung eines End-Tests sowie einer Gut-/Schlecht-Separation.

Hereinafter, further features and advantages of embodiments according to the invention will be explained in more detail with reference to an embodiment with reference to figures of the drawing. In the drawing show in sketched representations:

FIG. 1:

a perspective view of a device according to the invention in a production process with a view in the transport direction with already bound units of core and a two-piece back in different stages of production;

FIG. 2:

a perspective view analog FIG. 1 looking in the direction opposite to the transport direction, in particular to represent a region around a transport device for tabs;

FIG. 3:

an excerpt from FIG. 2 ;

FIG. 4:

a perspective view similar to the preceding figures substantially perpendicular to the transport direction to represent final production steps including an end-test and

FIG. 5:

an enlarged view of the area D with facilities by performing a final test and a good / bad separation.

Throughout the various illustrations, the same reference numerals are always used for the same elements. Without limiting the invention, only one use of a device according to the invention for producing calendars will be shown and described below, in particular for desk calendars. However, it is similar to the expert in addition to a known interchangeability of paper and cardboard against films or thin metal plates or similar. Obviously, information and / or advertising holders, table information carriers or table stands for various types of presentations can also be produced in the same way for recipe collections or as cookbooks in a wide variety of formats. In this case, a type of binding of the units to be processed for the application and / or adaptation of a device according to the present teaching is not significant.

FIG. 1 shows an embodiment of a device 1 according to the invention in a perspective view with a view in the transport direction. Here already bound units 2 desk table to be finished are shown in successive process steps or production stages in the line with areas A to D described below in detail.

These units 2 each comprise a core 3 and a back 4, which are integrally connected by a ring bond not shown here with each other. The back 4 is constructed in two pieces, so it usually includes two congruent Rear parts 4a, 4b. The units 2 are conveyed on a conveyor belt 5 through three areas A, B and C of the device 1 to a final inspection with subsequent good / bad separation.

In area A, essentially only one opening of a respective unit 2 takes place. In this case, the core 3 is retracted into the working position on the conveyor belt 5, so that the two-part back 4 with back parts 4a, 4b is accordingly turned away from the conveyor belt 5 or directed upwards ,

In a first step, the upper back part 4a is now lifted by a sucker 6 relative to the lower back part 4b during transport on the conveyor belt 5. Between the back parts 4a, 4b subsequently engages a pneumatic lifter 7 for the defined lifting of the upper back part 4a. The opening and raising of the upper back portion 4a is continued to an over-center position until it rests against a support and guide plate 8, so that an automatic closing of the arrangement described can be safely excluded. This leaves the back parts 4a, 4b open until further on each other at an angle α of more than 90 °, here it is about 110 °.

In an alternative not further illustrated here, a substantially triangularly ascending ramp is used for this opening from raising the upper back part 4a until it is transferred to said stable over-center position, which ramp is inserted progressively between the back parts 4a, 4b. This results in the opening described automatically and without the use of other active to be actuated drives, etc. in the course of progressing transport of the unit 2 on the conveyor belt 5. Each use of a ramp But makes an extension of the conveyor belt 5 is required, so that this passive approach must be replaced if given a maximum length of the entire conveyor belt 5, if necessary in favor of shortening the longest axis of the entire device against the pneumatic components described above.

In time, essentially parallel, a tab 9 is produced in area B by folding a strip 11 of paper drawn from a supply, in this embodiment a roll-shaped endless storage 10, provided with an adhesive and positioned between the back parts 4a, 4b. These processes are based on the representation of FIG. 2 even better recognizable, to which reference is now made. Next, the paper strip 11 is preformed substantially V-shaped over pulleys and guides and finally folded.

FIG. 3 to illustrate the structure and the manufacturing processes for this purpose, a range of a cutting device 12 to the positioning of a respective tab 9 on the lower back part 4b as an enlarged detail of FIG. 2 , In the region of the cutting device 12, a respective free end 13 of the folded paper strip 11 between two belt-shaped transport belt 14 of a conveyor 15 is pulled and fixed under clamping. Upon reaching a predetermined length of the paper strip 11, the cutting device 12 is activated so that a folded and exactly sized piece of the paper strip 11 is separated and transported as a later tab 9 with frictional engagement between the belt-shaped transport belt 14. The feed of the paper strip 11 corresponds to the activation of the cutting device 12 substantially a transport speed of the conveyor 15, so that the paper strip 11 is received safely and free of compression or wrinkling of the conveyor 15.

The two conveyor belts 14 of the conveyor 15 run at the same speed or synchronously and in opposite directions, ie substantially mirror-inverted, so that the conveyor belt 14 have in direct contact with each other no relative movement. The driven transport belts 14 thus form two caterpillar conveyors abutting one another via a transport path as conveying means 15 for a plurality of tabs 9. The transport path of the conveyor 15 thus created extends from a catchment area near the cutting device 12 to a surface of a respective lower back part 4a, on the following a tab 9 is positioned. When positioning a relevant tab 9, a transport speed of the conveyor 15 essentially corresponds to that of the conveyor belt 5 with the units 2 transported thereon.

In a subsequent step, an adhesive layer is now applied on the outside in area B on two opposite regions of the tab 9, which is carried out using a hot melt adhesive. Depending on the activation of the cutting device 12 and the transport speed of the conveyor 15, a position of a tab 9 in the conveyor 15 is always known exactly. Upon reaching a predetermined position, the coating of the tab 9 with adhesive takes place contactlessly as a job over at least two nozzles 16. Alternatively, sensors on the conveyor 15 for controlling the nozzles 16 for coating the tabs 9 can be used.

The hot melt adhesive has been selected as the substance and tempered in the region of the nozzles 16 in such a way that it reliably adheres in a very small amount in the form of a thin film 17 to a respective tab 9 until the tab 9 between the two back parts 4a, 4b positioned and the back parts 4a, 4b have been folded back into one another in a subsequent region C and compressed by a pressing roller 18 which can be pivoted into a closed position. Also, an applied amount of hot melt adhesive is such that swelling out beyond the tab 9 and / or sticking or sticking together of the folded flap 9 is also precluded.

After activation of the cutting device 12 and the formation of a tab 9, a further feed of the paper strip 11 is then stopped and restarted only after a waiting period. This is set between successive tabs 9 in the conveyor 15, a distance Δ. This distance can be correspondingly adjusted with a delivery cycle of the conveyor belt 5 and a format of the units 2 transported thereon so that the conveyor device 15 could be operated substantially continuously. Preferably, however, a controlled via not shown sensors, intermittent operation of the conveyor 15 is selected, wherein the activation of the conveyor 15 is clocked by an arrival of a respective prepared unit 2 on the conveyor belt 5.

Also at this position can alternatively instead of a separately pneumatically operated Zuklapp mechanism, such as in FIG. 4 again, a substantially triangular ramp can be used. Analogous to the situation of area A in FIG. 1 would now the upper back part 4a For example, from the support and guide plate 8 ago in the transport direction wedge-shaped continuously behind engaged and folded on the lower back part 4b. This ramp could then also include the pressing roller 18.

After compressing the tab 9 between the back parts 4a, 4b, the hot-melt adhesive is then already sufficiently cooled as a thin film 17 that a loosening of one of the bonds in the context of acting on a unit 2 in the function as a desk calendar normal forces is no longer possible. Accordingly, it is now possible to carry out a final check directly in the area C, also on the pusher roller 18 of the area B, in such a way that the presence and sufficient adhesion of the lug 9 to the respective back parts 4a, 4b are checked by a proper function of the lug 9, see FIGS. 4 and 5 , For this purpose, a fork-shaped spring plate 19 is provided, between the upper prong 19a and lower prong 19b, an optical sensor is arranged. Before closing the back parts 4a, 4b and the subsequent compression or pressing of at least the area around the tab 9, a tongue of a pneumatic lifter 20 is arranged between the back parts 4a, 4b. After the discharge and pivoting back of the pusher roller 18, the upper back part 4a is lifted by the pneumatic lifter 20, which again alternatively be carried out using a correspondingly dimensioned and already introduced before the closing of the back parts 4a, 4b between them, for example with a lip triangle ramp can.

In any case, the tab 9 is lifted by raising the upper back part 4a and the lower back part 4b only with proper function of the tab. If the lower back part 4b remains on the core 3, however, the gluing of the tab 9 must be faulty. Only in this case interrupts the lower back part 4b does not have a light barrier of the optical sensor located between the prongs 19a, 19b, or the unit 2 even sticks to the lower prong 19b of the optical fork sensor 19 formed as a fork-shaped spring plate. In these cases, a good / bad separator 21 in area D is activated. A relevant unit 2 is then rejected as a committee by opening a flap 22 downwards, see arrow S. Good parts leave the area D, however, by a slider 23 on a transport path not shown in the direction of arrow G out.

With the saving of a plastic part, an efficient method for the production of desk calendars has thus been described above, which is flexibly adaptable to different formats. Compared to products according to the EP 2607092 A1 In accordance with the invention, products have a higher degree of uniqueness since, in addition to a small amount of adhesive, they consist essentially only of a metallic bond, paper and cardboard. An environmentally friendly reprocessing of such products has thus been further improved according to the present invention.

LIST OF REFERENCE NUMBERS

1

contraption

2

unit

3

core

4

move
4a upper back part (in production position)
4b lower back part (in production position)

5

conveyor belt

6

sucker

7

pneumatic lift (alternatively ramp)

8th

Support and guide plate

9

flap

10

Endless Memory

11

paper strips

12

cutter

13

free end of the paper strip 10

14

belt-shaped transport belt

15

Conveyor / tracked conveyor

16

Nozzles for applying / spraying hot glue

17

adhesive film

18

swiveling press roller / pusher roller (alternatively ramp)

19

Spring plate on an end sensor / optical fork sensor
19a upper prong
19b lower prong

20

pneumatic lifter for selectively lifting the upper back part 4a after being compressed

21

Good / bad Separator

22

flap

23

pusher

A

1st area = opening

B

2nd area = form tab and position

C

3rd area = close and final test

D

4th range = good / bad separation

α

Opening angle between the back 4 in the over-center position

Δ

Distance between tabs 9 in the conveyor 15th

G

Conveying direction good part

S

Direction of transport bad part or committee

Claims (14)

Method for the production of table calendars with a core (3) and a two-piece back piece (4) and a binding connecting the back pieces (4) and the core (3), wherein the back pieces (4) are joined together to form an A-pillar,
characterized in that
in a bound unit (2) with working backs up (4)
an upper back (4a) is raised relative to a lower back (4b),
a tab (9) coated with an adhesive and inserted between the upper back (4a) and the lower back (4b)
and the upper back (4a) is placed on the lower back (4b). Method according to the preceding claim, characterized in that the tab (9) is produced by folding a substantially V-, M- or W-shaped paper strip (11) consisting of a supply, in particular a roller-shaped endless storage (10 ), withdrawn and then cut to length. Method according to the preceding claim, characterized in that the tab (9) is transported from a folding and cutting position via an adhesive application to positioning on the lower back (4b) using a conveyor (15). Method according to the preceding claim, characterized in that the tab (9) under clamping between two synchronously running, rubberized conveyor belts or Conveyor belt (14) is fed into the conveyor (15), transported and positioned on the lower back (4b) of a unit (2). Method according to one of the preceding claims,
characterized in that the coating of the tab (9) is performed externally at two substantially opposite locations with adhesive, in particular using a hot melt adhesive. Method according to the preceding claim, characterized in that the coating of the tab (9) with adhesive takes place without contact as an application of an adhesive film (17) using at least two nozzles (16). Method according to one of the preceding claims,
characterized in that for selective lifting of the upper back part (4a) a sucker (6) is used, the upper back part (4a) following a pneumatic jack (7) or a substantially triangular rising ramp for defined lifting of the upper back part (4a). Method according to the preceding claim, characterized in that opening and lifting of the upper back part (4a) is continued beyond an over-center position, in particular until the upper back part (4a) bears against a support and guide plate (8). Method according to one of the preceding claims,
characterized in that the upper back (4a) after insertion of the adhesive tab (9) placed on the lower back (4b) and is pressed at least in the region of the tab (9), in particular using a press roll (17). Method according to one of the preceding claims,
characterized in that a final test is realized by raising the upper back part (4a) of a respective unit (2), the lower back part (4b) only being secured by a tab (9) connected correctly to the back parts (4a, 4b) ) is raised so far that a signal of an optical fork sensor (19) is interrupted. Method according to one of the preceding claims,
characterized in that for raising or closing the upper back part (4a) correspondingly dimensioned and substantially triangular extending with respect to a transport direction ramps are used. Device for the production of table calendars with two-piece back, which is designed in particular for implementing a method according to one of the preceding claims, in which the two back parts (4a, 4b) are connected to form an A-post,
characterized,
that the device A conveyor belt (5) for a horizontal feed of bonded units (2) each comprising a core (3) and a back (4) with upwardly located two back parts (4a, 4b), A device for lifting an upper back part (4a) in relation to a lower back part (4b) lying on the core (3), A means for introducing and positioning an externally adhesive tab (9) between the back parts (4a, 4b) • a means for closing or placing the upper back part (4a) on the lower back part (4b). Device according to the preceding claim, characterized in that the device for lifting the upper back part (4a) relative to the lower back part (4b) is designed as a suction device (6), wherein for fully opening a pneumatically actuated lever (7) and / or a in the transport direction of the units (2) rising ramp is provided. Device according to one of the preceding claims, characterized in that a final test optical fork sensor (19) as a spring plate with an upper prong (19a) and a lower prong (19b) is formed so that a sensor signal only by a lower back part (4b) interruptible is, which is raised by a predetermined manner correctly arranged tab (9) through the upper back part (4a).

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