Apparatus for cutting into lengths and bringing together a spine strip with cover boards for the mechanized production of book cases

Information

  • Patent Application
  • 20070292242
  • Publication Number
    20070292242
  • Date Filed
    June 15, 2007
    17 years ago
  • Date Published
    December 20, 2007
    17 years ago
Abstract
In an apparatus for cutting to length sections of a spine insert (1) that is unwound from a supply reel and for bringing together the spine inserts with infed cover boards (8) in a roller applicator (5, 6) for the mechanized production of book cases, the invention proposes that the pair of cut length transport rollers (3.1) for drawing forward a defined drawing-off length (L) of the spine insert (1) and for positioning the spine insert in the cutting device (9) and the pairs of feed rollers (4.1, 4.2, 4.3) for transporting the cut-to-length spine inserts (1) into the roller applicator (5, 6) through a transport channel (2) can be driven independently of one another, wherein the pairs of feed rollers (4.1, 4.2, 4.3) can be intermittently driven in a cyclic fashion with a constant stroke (HZ) while the pair of cut length transport rollers (3.1) carry out the transport stroke (HS), that is variable due to the drawing-off length (L) and features a first motion segment (20a) for synchronizing with the transport movement of the pairs of feed rollers (4.1, 4.2, 4.3) and a second motion segment (20c,b) in which the pair of cut length transport rollers is synchronized with the pairs of the feed rollers (4.1, 4.2, 4.3) and transports the spine insert (1) together with the pairs of feed rollers.
Description

BRIEF DESCRIPTION OF THE DRAWING

An embodiment of the invention is described below with reference to the drawing, in which:



FIG. 1 is a schematic representation of the transport device, and



FIG. 2 is a motion diagram.





DETAILED DESCRIPTION

As may be understood from the figures, the strip-like spine insert 1 is unwound from a not-shown supply reel and drawn forward into a transport channel 2 by first and second pairs of cut length transport rollers 3.1 and 3.2 that are spaced apart from one another and respectively composed of a driven roller and a spring-loaded roller 3a and 3b, wherein the spine insert is also positioned in a cutting device 9 for cutting off a spine insert 1 of the desired format length L.


Subsequently, pairs of feed rollers 4.1, 4.2 and 4.3 transport the cut-to-length spine insert 1 to a roller applicator that is composed of a cloth cylinder 5 and an upper roller 6, in synchronism with cyclically infed cover boards 8. In this case, a blank to be covered 7, which is provided with an adhesive, is applied on the cover boards 8 and the spine insert 1, whereby the protruding sides of the blank to be covered 7 are folded and pressed against the upper sides of the cover boards 8 and the spine insert 1 in ensuing turn-in stations that are not illustrated in greater detail.


The pairs of feed rollers 4.1, 4.2 and 4.3 are collectively driven by a separate servomotor 13. In order to synchronously bring together the book case components, its drive controller 13a is permanently synchronized with a shaft encoder 15 that detects the rotational movement of the cloth cylinder 5. The infeed of the cover boards 8 is scanned with the aid of a light barrier 16 in order to trigger a cyclic transport stroke HZ for the spine insert 1.


The pairs of feed rollers 4.1, 4.2 and the 4.3 have a constant transport stroke HZ. The path curve 19 of the transport stroke HZ is illustrated in the motion diagram according to FIG. 2, in which the time t is plotted along the abscissa and the path s is plotted along the ordinate. After an acceleration in 19a, the transport takes place in synchronism with the cover boards 8. The path curves 18.1 and 18.2 respectively show the transport movement of one cut-to-length spine insert 1a to 1c, wherein the path curve 18.1 indicates the front edge and 18.2 indicates the rear edge of the spine insert 1.


The transport roller arrangement illustrated laterally adjacent to the motion diagram makes it clear that the spine insert 1 is only transported by the roller applicator itself after it emerges from the last pair of feed rollers 4.3 that is positioned at a distance B behind the roller applicator. The deceleration 19b at the end of the path curve 19 therefore no longer has any influence on the transport movement of the spine insert 1. Referred to the cycle time T, the transport stroke HZ takes place within a fixed infeed transport time tZ.


An ensuing spine insert 1 is drawn forward while the cut-to-length spine insert 1 is fed to the roller applicator. The transport stroke HS that is variable in accordance with the format length L ends at the same time as the transport stroke HZ of the infeed transport. The pairs of cut length transport rollers 3.1 and 3.2 that are collectively driven by a separate servomotor 12 with assigned drive controller 12a carry out the transport in synchronism with the pairs of feed rollers 4.1, 4.2 and 4.3.


In the motion diagram according to FIG. 2, the path curve 20 for the leading edge of the material strip drawn forward by the pairs of cut length transport rollers 3.1 and 3.2 is shown for the format length L of the spine insert 1. The transport stroke HS takes place in the cut length transport time tS. A standstill time tSS elapses until the next spine insert 1 is drawn forward.


A glance at the laterally illustrated transport roller arrangement makes it clear that the transport movement HS is synchronized with the transport movement HZ of the pairs of feed rollers 4.1, 4.2 and 4.3 in a first motion segment of the acceleration 20a, and that the material strip is subsequently introduced into the first pair of feed rollers 4.1 that is arranged upstream of the cutting device 9 by the distance A. The spine insert 1 is then collectively transported by the pairs of cut length transport rollers 3.1 and 3.2 and the pairs of feed rollers 4.1, 4.2 and 4.3, wherein the deceleration 20b in the path curve 20 of the cut length transport is also in synchronism with the deceleration 19b of the infeed transport after a motion segment of constant speed 20c.


In order to elucidate the variable transport stroke HS of the pairs of cut length transport rollers 3.1 and 3.2, another path curve 21 for the smallest format length LK and a path curve 22 for the greatest format are also in the motion diagram.


A cutting process is triggered as soon as the common transport movement of the pairs of cut length transport rollers 3.1 and 3.2 and of the pairs of feed rollers 4.1, 4.2 and 4.3 comes to standstill. In this respect, the motion diagram shows the valve control 17 of a pneumatic valve 11 that controls a pneumatic cylinder 10 for carrying out the cutting process back and forward between a cutting on 1 and a cutting off 0 position.


The infeed of a spine insert 1 to the roller applicator can be realized as soon as the spine insert was cut off the material strip. Since the spine insert is transported away from the cutting device 9 in this case, the cutting knife can still be situated in the cutting on 1 position. It does not have to be switched into the cutting off position until an ensuing spine insert 1 is drawn forward by the pairs of cut length transport rollers 3.1 and 3.2. According to the motion diagram shown in FIG. 2, the process of drawing forward a spine insert even begins with a delay referred to the infeed transport when processing a spine insert 1 with the largest format length LG such that sufficient standstill time remains for controlling back the cutting knife into the cutting off 0 position.


The disclosed apparatus for the first time makes it possible to realize the above-described optimized motion sequence with a very short standstill time for cutting into lengths a spine insert 1 that was drawn forward. Due to the cutting process that takes place at a standstill, the cut-to-length spine inserts 1 have a very high cut length accuracy and can be fed to the roller applicator in rapid succession in order to realize a high output of book cases per cycle. The apparatus is characterized by a particularly clear and simple design. The servo motors 12 and 13 also make it possible to easily change the length and/or position of the spine insert 1 during the operation of a casemaker.

Claims
  • 1. An apparatus for cutting to length sections of a spine insert (1) that is unwound from a supply reel and for bringing together the spine inserts with infed cover boards (8) in a roller applicator (5, 6) for the mechanized production of book cases, comprising: a cutting device (9);at least one pair of cut length transport rollers (3.1) for drawing forward a defined drawing-off length (L) of the spine insert (1) and positioning the spine insert in the cutting device (9);at least one pair of feed rollers (4.1, 4.2, 4.3) for transporting the cut-to-length spine insert (1) through a transport channel (2) and into the roller applicator (5, 6);independent drivers for the cut length transport rollers (3.1) and the feed rollers (4.1, 4.2, 4.3);a controller for the drivers whereby the feed rollers (4.1, 4.2, 4.3) can be intermittently operated with a constant stroke (HZ) in a cyclic fashion in order to transport the cut-to-length spine insert (1) from the cutting device (9) into the roller applicator (5, 6), andthe cut length transport rollers (3.1) can carry out a variable transport stroke (Hs), corresponding to the drawing-off length (L), in the form of a first motion segment (20a) for synchronizing with the transport movement of the pairs of feed rollers (4.1, 4.2, 4.3) and a second motion segment (20c,b) in which the cut length transport rollers are synchronized with the feed rollers (4.1, 4.2, 4.3) and transport the spine insert (1) together with the feed rollers.
  • 2. The apparatus according to claim 1, wherein the first of a plurality of pairs of feed rollers (4.1) arranged in a the transport direction is at a defined transport distance (A) from the cutting device (9), and said transport distance is used as a transport section for synchronizing the cut length transport rollers (3.1) with the transport movement of the feed rollers (4.1, 4.2, 4.3).
  • 3. The apparatus according to claim 1, wherein the spine insert (1) is synchronously transported by the feed rollers (4.1, 4.2, 4.3) while it is brought together with the infed cover boards (8).
  • 4. The apparatus according to claim 1, wherein the last of a plurality of pairs of feed rollers arranged in a transport direction is at a defined transport distance (B) from the roller applicator (5, 6), and said transport distance is used as a transport section for decelerating to common transport movement of the cut length transport rollers (3.1) and the pairs of feed rollers (4.1, 4.2, 4.3) while a new spine insert (1) is drawn forward after the preceding spine insert (1) has departed said last pair of feed rollers (4.3).
  • 5. The apparatus according to claim 1, wherein the cut length transport rollers (321) and the feed rollers (4.1, 4.2, 4.3) are respectively driven by servo motors (12, 13).
  • 6. The apparatus according to claim 1, wherein at least two pairs of cut length transport rollers (3.1, 3.2) are arranged at certain distances from one another.
  • 7. The apparatus according to claim 2, wherein the spine insert (1) is synchronously transported by the feed rollers (4.1, 4.2, 4.3) while it is brought together with the infed cover boards (8).
  • 8. The apparatus according to claim 2, wherein the last of a plurality of pairs of feed rollers arranged in a transport direction is at a defined transport distance (B) from the roller applicator (5, 6), and said transport distance is used as a transport section for decelerating to common transport movement of the cut length transport rollers (3.1) and the pairs of feed rollers (4.1, 4.2, 4.3) while a new spine insert (1) is drawn forward after the preceding spine insert (1) has departed said last pair of feed rollers (4.3).
  • 9. The apparatus according to claim 3, wherein the last of a plurality of pairs of feed rollers arranged in a transport direction is at a defined transport distance (B) from the roller applicator (5, 6), and said transport distance is used as a transport section for decelerating to common transport movement of the cut length transport rollers (3.1) and the pairs of feed rollers (4.1, 4.2, 4.3) while a new spine insert (1) is drawn forward after the preceding spine insert (1) has departed said last pair of feed rollers (4.3).
  • 10. The apparatus according to claim 2, wherein the cut length transport rollers (321) and the feed rollers (4.1, 4.2, 4.3) are respectively driven by servo motors (12, 13).
  • 11. The apparatus according to claim 3, wherein the cut length transport rollers (321) and the feed rollers (4.1, 4.2, 4.3) are respectively driven by servo motors (12, 13).
  • 12. The apparatus according to claim 4, wherein the cut length transport rollers (321) and the feed rollers (4.1, 4.2, 4.3) are respectively driven by servo motors (12, 13).
  • 13. The apparatus according to claim 8, wherein the cut length transport rollers (321) and the feed rollers (4.1, 4.2, 4.3) are respectively driven by servo motors (12, 13).
  • 14. The apparatus according to claim 9, wherein the cut length transport rollers (321) and the feed rollers (4.1, 4.2, 4.3) are respectively driven by servo motors (12, 13).
  • 15. The apparatus according to claim 2, wherein at least two pairs of cut length transport rollers (3.1, 3.2) that are arranged at certain distances from one another.
  • 16. The apparatus according to claim 3, wherein at least two pairs of cut length transport rollers (3.1, 3.2) that are arranged at certain distances from one another.
  • 17. The apparatus according to claim 4, wherein at least two pairs of cut length transport rollers (3.1, 3.2) that are arranged at certain distances from one another.
  • 18. The apparatus according to claim 5, wherein at least two pairs of cut length transport rollers (3.1, 3.2) that are arranged at certain distances from one another.
Priority Claims (1)
Number Date Country Kind
DE 102006027903.4 Jun 2006 DE national