Patent Application
20080138171
The invention pertains to a book casing device with support plates of a circulation conveyor that transport the books astraddle in a vertical position and with a book delivery unit having a stripping element that is arranged in the plane of motion of the support plates and features a through-opening for the support plates, wherein the downwardly moving books are supported on the stripping element in order to be released from the support plates, and with a delivery device for the subsequent lateral delivery of the books referred to the plane of motion of the support plates.
A book casing device of the described design with a schematically illustrated book delivery unit is known, for example, from DE-OS 20 16 425. The book blocks are vertically transported from the bottom toward the top astraddle by means of support plates of a circulation conveyor, wherein glue is simultaneously applied on the book blocks that are subsequently provided with a case. During the additional transport, the downwardly moving books reach a delivery device with a drum-shaped stripping element that can be turned back and forward about its longitudinal axis, as well as a delivery rake mounted thereon. The stripping element features a through-slot for guiding through the support plate while the book is stripped off the saddle plate. The books are received from the delivery rake by means of a not-shown tilting element that is arranged on the stripping element, namely due to the rotational movement of the stripping element, and then deposited on a delivery conveyor.
DE 197 17 736 A1 describes a book delivery unit, in which the stripping element is fixed in the through-position for the support plates and the depositing rake can be pivoted relative to the stripping element. The movement of a delivery unit that serves as the tilting element is synchronized with the movement of the support plates in such a way that the book is tilted toward the depositing rake from its vertical position when the through-opening is closed by the support plate.
In the known book delivery systems, the books are quasi pushed over from their vertical position. The depositing rake absorbs the fall and deposits the books on a continuously moving delivery conveyor in the form of a depositing movement, during which it pivots about an axis extending parallel to the stripping element. This causes freshly cased-in books to be subjected to significant stresses that lead to the deformation of the books and jeopardize the connection produced between the book block and the case. Any occurring relative movements with the stripping element, the depositing rake and/or the delivery conveyor may result in markings on books with sensitive case coverings.
The invention is based on the objective of developing a book casing device with book delivery of the initially described type which makes it possible to reliably and flawlessly deliver the books from the circulation conveyor with a high cycle rate.
According to the invention, this objective is attained by providing a means for continuously supporting a book and a delivery device that make it possible to transfer the books from the stripping position into a delivery position while they are continuously supported. The books are no longer tilted or pushed over. The books are permanently supported during the delivery from the circulation conveyor without being temporarily released. The book shape is preserved. Due to the gentle treatment, the glue connection between the book block and the case is not jeopardized.
Preferred embodiments of the inventive book delivery unit are defined in the dependent claims.
It is advantageous if the delivery device can be moved back and forward between the stripping position and the delivery position. The delivery device preferably is movable essentially perpendicular to the plane of motion of the support plates such that the books maintain their vertical position and are delivered into a delivery plane that lies parallel to the plane of motion of the support plates.
In order to divide the book flow, two delivery devices may alternately receive the books from the stripping position and respectively transfer the books into delivery positions on opposite sides of the plane of motion of the support plates. In this case, the two delivery devices are preferably arranged at a defined distance from one another on a slide unit that can be moved back and forward.
In a preferred embodiment, the stripping element serves as the means for continuously supporting a book and can be laterally moved to a delivery position. It is laterally moved out of the plane of motion of the support plates while supporting the book deposited thereon.
During the transfer, the books may be laterally supported by supporting rails. As an alternative to the displaceable stripping element, the books may be transferred while they are laterally clamped by the supporting rails only or they are laterally supported and transferred by the supporting rails while being carried by the stripping element. The supporting rails are preferably format-adjustable to the book thickness with respect to a guiding width. They may be realized in a L-shaped fashion and respectively feature a limb that is oriented in the direction of the book height and a limb that is oriented in the direction of the book width such that the sides of the book remain partially exposed for downstream transport means. The supporting rails may be realized such that they can be closed and opened in order to laterally clamp the books during the laterally directed delivery movement.
In order to reduce the speed with which the book is deposited on the stripping element by the support plates, the stripping element may be moved downward at the instant in which the book is deposited thereon.
In one preferred additional development, a book gripper is provided downstream of the book delivery unit in order to turn and transfer the books into a second delivery position, wherein said book gripper can be pivoted about an axis and receives the books from said first delivery position while laterally clamping the books.
In order to realize a defined delivery of the books into the second delivery position, the pivoting axis of the book gripper may be horizontally format-adjustable parallel to itself such that the position of the books can be defined in the horizontal direction, i.e., in the direction in which the book height extends, in order to change, for example, the reference edge when the books are turned from the head or foot to the book center or vice versa.
A defined delivery of the books into the second delivery position can also be realized if the pivoting axis of the book gripper is vertically format-adjustable parallel to itself such that the position of the books can be defined in the vertical direction, i.e., in the direction in which the book width extends, in order to change, for example, the reference edge when the books are turned from the fore edge cut to the book spine or vice versa, wherein the shape of the spine, i.e., a straight or a curved shape, as well as the radius of the curvature, can also be taken into account.
The characteristics of one preferred embodiment of the present invention are described in greater detail below with reference to the enclosed drawings, in which:
Book blocks 2 and cases 3 are connected into books 1 in the book casing-in machine or device 10. The book blocks 2 are fed to a circulation conveyor 10.3 by a book block transport chain 10.1, wherein said circulation conveyor transports the book blocks 2 astraddle on support plates 10.4 such that they are always positioned vertically. During the vertical transport movement of the book blocks, glue is applied over the entire surface of their end sheets by means of gluing rollers 10.6 and the book blocks are subsequently connected to a case 3 supplied by a case transport unit 10.2. The thusly created books 1 may subsequently also pass through pressing rollers 10.7.
During the additional transport, the downwardly moving books 1 reach a book delivery unit 20 that lies in the plane of motion 10.5 of the support plates 10.4, wherein the fore edge cut 1b of the books 1 is placed onto a stripping element 20.5 that features a through-slot 20.5a for guiding through the support plates 10.4 (see
In this case, the first means for continuously supporting a book is formed by the stripping element 20.5, on which the book 1 is supported with its fore edge cut 1b. This means that the book 1 is no longer pushed down by the stripping element 20.5 as it is the case in the state of the art, but rather moved out of the plane of motion 10.5 of the support plates 10.4 by this stripping element, namely while being supported or carried thereby. For this purpose, the stripping element 20.5 is situated on a slide unit 20.3 that can be moved back and forward perpendicular to the plane of motion 10.5 in a guide rail 20.4 such that the books 1 maintain their vertical position while they are delivered into a delivery plane that lies parallel to the plane of motion 10.5.
In addition to the stripping element 20.5, additional means for continuously supporting in the form of left and right supporting rails 20.6 and 20.7 are provided which are opened to a guiding width that is format-adjustable to the book thickness when the respective book 1 is stripped off the support plate 10.4, wherein said supporting rails are closed to a narrow guiding dimension or with a slight clamping force immediately before the lateral movement of the slide unit 20.3 so as to laterally support the book 1. The required control means are not explicitly illustrated in the figures, but rather only symbolized with motion arrows.
In order to divide the book flow situated in the circulation conveyor 10.3, a first and a second book receptacle 20.1 and 20.2 may alternately receive the books 1 from the stripping position 20.10 and transfer the books into left and right delivery positions 20.11 and 20.12 referred to the plane of motion 10.5. The two book receptacles 20.1 and 20.2 are arranged at a defined distance from one another on a slide unit 20.3 that can be moved back and forward such that the second book receptacle 20.2 is moved from its right delivery position 20.12 into the stripping position 20.10 simultaneously with the delivery stroke of the first book receptacle 20.1 and vice versa.
In order to reduce the speed with which the book 1 is deposited on the stripping element 20.5 by the support plates 10.4, the stripping element 20.5 may be moved downward in the instant in which the book is deposited thereon. According to an alternative embodiment that is not illustrated in the figures, the book 1 to be delivered may be clamped by the left and right supporting rails 20.6 and 20.7 only. This would merely require a single stripping element 20.5 that remains in the plane of motion 10.5 and can be transferred into a lowered position during the delivery of the book 1.
After casing-in the book block 2 into the case 3, the book 1 is usually also pressed in so as to produce a crease-free and permanent glued connection between the end sheets of the book block 2 and the inner pages of the case. This full surface pressing step is carried out on so-called binding-in machines in combination with the joint forming, in which the case joints 1c are formed and glued. The books need to be fed into the binding-in machines with the spine 1a pointing downward in order to align the spine 1a or the book 1 on an alignment table 43.1 formed of prism strips 43.2.
The present book delivery unit 20 is expanded with a double book gripper 30 that makes it possible to transfer the books 1 from the respective left and right delivery positions 20.11 and 20.12 into second left and right delivery positions 30.11 and 30.12, wherein the books 1 are turned and directly deposited on said alignment table 43.1 with their spine 1a.
In order to receive the divided book flow, the double book gripper 30 features a left and a right book gripper 30.1 and 30.2 that can be pivoted back and forward about a pivoting axis 30.3 by 180°, namely in a diametrically opposed fashion as symbolized in the figures with corresponding motion arrows. The books 1 are laterally taken hold of by a left and a right clamping jaw 30.4 and 30.5 in a region that is left exposed by the left and the right supporting rails 20.6 and 20.7. For this purpose, the supporting rails 20.6, 20.7 are realized in an L-shaped fashion and respectively feature a horizontally extending limb 20.8 that is oriented in the direction of the book height and a vertically extending limb 20.9 that is oriented in the direction of the book width.
It is possible to deposit the books 1 on the alignment table 43.1 in a predetermined position with parallel pivot point adjustments 30.6, 30.7 of the pivoting axis 30.3 in the horizontal direction and the vertical direction—as symbolically illustrated with broken double arrows in
The horizontal pivot point adjustment 30.6 makes it possible to define the position of the books in the horizontal direction, i.e., in the direction in which the book height extends. In the book casing device 10, the books 1 are transported astraddle on the support plates 10.4 with a foot edge 20.13 of fixed format. However, in the binding-in machine, a book center 30.13 of fixed format is desirable such that the books 1 are centrally clamped in the pressing devices. During format changes, this reference edge change can be automated in the form of a corresponding horizontal pivot point adjustment 30.6 in dependence on the respective change in the book height.
The vertical pivot point adjustment 30.7 makes it possible to define the position of the books in the vertical direction, i.e., in the direction in which the book width extends. After being positioned on the stripping element 20.5, the books 1 are delivered out of the book casing device 10 with the fore edge cut 1b as fixed reference edge 20.14. However, the books 1 need to be fed to the binding-in machine with the spine la as fixed reference edge 30.14. During format changes, this reference edge change can be automated in the form of a corresponding vertical pivot point adjustment 30.7 in dependence on the respective change in the book width, wherein the spine shape, i.e., a straight or a curved spine shape, as well as the radius of the curvature, can also be taken into account.
In
| Number | Date | Country | Kind |
|---|---|---|---|
| DE 102006058089.3 | Dec 2006 | DE | national |
