EP3533738A2 - Frein à feuille d'impression - Google Patents

Frein à feuille d'impression Download PDF

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Publication number
EP3533738A2
EP3533738A2 EP19159033.0A EP19159033A EP3533738A2 EP 3533738 A2 EP3533738 A2 EP 3533738A2 EP 19159033 A EP19159033 A EP 19159033A EP 3533738 A2 EP3533738 A2 EP 3533738A2
Authority
EP
European Patent Office
Prior art keywords
air jet
sheet
brake
product
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19159033.0A
Other languages
German (de)
English (en)
Other versions
EP3533738B1 (fr
EP3533738A3 (fr
Inventor
Christian Troxler
Roger LÜSCHER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mueller Martini Holding AG
Original Assignee
Mueller Martini Holding AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mueller Martini Holding AG filed Critical Mueller Martini Holding AG
Publication of EP3533738A2 publication Critical patent/EP3533738A2/fr
Publication of EP3533738A3 publication Critical patent/EP3533738A3/fr
Application granted granted Critical
Publication of EP3533738B1 publication Critical patent/EP3533738B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/686—Pneumatic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/18—Oscillating or reciprocating blade folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/22—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/14—Retarding or controlling the forward movement of articles as they approach stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4492—Features of movement or transforming movement of handled material braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4492—Features of movement or transforming movement of handled material braking
    • B65H2301/44921—Features of movement or transforming movement of handled material braking by friction contact with non driven element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/64—Other elements in face contact with handled material reciprocating perpendicularly to face of material, e.g. pushing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1313—Edges trailing edge

Definitions

  • the present invention relates to a printing sheet brake according to the preamble of the device claim 1 and the method claims 30, 31.
  • the changes in direction of the printed sheet parts injected by various folding processes generally cause high deceleration and acceleration values on the sheet parts to be folded.
  • the deceleration and acceleration forces resulting from the deceleration and acceleration values as well as the mass of the deflected printed sheet parts have a negative effect on the product quality as well as on the stability of the folding process.
  • EP3002240 A1 and EP3002241 A1 Go brake devices, which are sometimes operated with a pneumatic medium (air).
  • braking devices have the significant advantage that they can come up against very fast reaction times, in particular also due to the very low inertia of the braking system, compared with known mechanical or electromagnetic systems.
  • pneumatic medium braking devices apart from the complementary brake pads, largely maintenance and wear-free.
  • EP3002240 A1 an apparatus and method for decelerating and positioning a signature in a processing machine out.
  • at least one means is provided which exerts a braking force effect on the printing sheet, and thus accomplishes the positioning of the printing sheet in connection with the operational process of a downstream processing station.
  • EP3002240 A1 various ways in which deceleration and positioning of a print sheet can take place:
  • the braking force-triggering air pulses are directed directly to the sheet and there unfold their effect resp. implement, whereby the number, strength and place of action of these air impulses can be adapted to the given conditions.
  • the braking force-triggering air pulses act on at least one mechanical element, which is arranged intermediately between the sheet and nozzle of the air pulse, such that the effective braking effect on the sheet then by said mechanical element takes place, such Element may have different dynamic configurations.
  • the positionally accurate braking of the sheet in the feed direction can at least partially accomplish by other acting on the sheet braking, so for example by installing a negative pressure acting on the brake force, which is usually arranged below the conveyor belts, with effect on the sheet.
  • a negative pressure acting on the brake force which is usually arranged below the conveyor belts, with effect on the sheet.
  • the friction between the surface of the table-like documents and the underside of the printing sheet in such a way that such a friction force can be preferably used as a fine adjustment for a precise final positioning of the sheet.
  • the number, strength and place of action can also be adapted to the prevailing conditions for the implementation of the negative pressure on the printed sheet.
  • the two effective braking forces so the braking force-triggering pulses on the sheet, they are operated directly or indirectly, and the increase in friction by another braking force, can be interdependent to each other or control independently, the braking force of the two changed case by case resp , can be adjusted.
  • an additional braking force can be accomplished by at least one mechanically activatable element which can be used for fine adjustment, for example, in addition to the force acting on the sheet pneumatic brake force-triggering pulses, such a mechanical element readily by an autonomous control or in the above sense purely by air pulses can be operated.
  • a braking device which is designed as a transverse release brake for a printed sheet.
  • This is also a method for braking and positioning of the sheet in the feed direction and for delaying the sheet during falzfflessig indentation and / or against the occurring flapping movements in the drawn sheet, and this is achieved by the following steps: i) Due to the given Production data such as folding scheme, paper weight, paper width, cut length, the pressure required for braking is calculated and the information sent to the automatic pressure regulator, taking into account that depending on the folding scheme of the sheets on the left and right sides may have different values; ii) A pressure accumulator with a pressure regulator ensures the physical values of the required compressed air; iii) the sheet entering / entering the fold area is detected at the trailing edge by means of a light barrier, wherein this light barrier is used at the same time the clock-accurate synchronization of the folding blade, the light barrier compensates for irregularities within the transport of the sheet; iv) Due to the given Production data such as folding scheme, paper
  • the object of the invention is to propose a highly efficient brake, preferably for products of a general kind, preferably for printed products, in particular for printed sheets, which provided by an impulse provided by Brake force is provided, which is provided by a pressurized pneumatic medium, and which is able to exert an efficient braking force to a body by transmitting an impulse force, which body then exerts the braking force directly on the product, whereupon an immediate braking effect.
  • the brake according to the invention can equally well be used, for example, in the passage through single or multiple folded printed products. It is even possible that this brake can be used in printed products in a scaly configuration.
  • the brake according to the invention is therefore preferably used for printed products, without, however, exclusively wanting to be able to use the brake according to the invention also readily for other flat formed transportable products of different thickness and material composition.
  • the inventive brake is focused below on the braking effect on printed sheets.
  • this inventive brake then logically called only printing sheet brake and described as such, designed so that within a period of time in the range of milliseconds (ms) the individual transported at high speed and delivered printed sheets are abruptly braked to zero, and they at the same time be positioned precisely for subsequent processing.
  • the positionally accurate positioning of the braked printing sheet is crucial for quality assurance, in particular in relation to the subsequent operations.
  • This quality assurance can be maximized by supplementing the system with a sheet stopper, which takes action at the very last stage of braking and ensures that any misalignment caused by the transport or at least the application of the braking force can be definitely compensated for 100% ,
  • the released kinematic energy is only minimally present in the local impact of the printed sheets on the sheet stop, because the deceleration according to the invention has already almost completely degraded this delivery-related kinematic energy.
  • the sheet stop may consist of a single body, which covers substantially the entire delivery width of the sheet, or consist of a number of spaced body parts. It is obvious that there is an interdependence between the remanence speed of the signature and not the full utilization of the braking force in its implementation.
  • This gentle process with respect to the end position of the printing sheet also has the advantage that the printed sheet can completely conform to the course of the stop surface (s), resulting in a definitive maximized accurate alignment of the sheet, this accurate alignment of the sheet then for quality assurance is crucial in subsequent operations.
  • the pneumatic valve is usually pressurized within a period of 8-10 ms. Of this, about 50% of this period, ie 4-5 ms, is consumed for shutting down the first flexible braking force converting element, and the remaining approximately 50% of this time, ie 4-5 ms, come into play for the actual braking process. That is, the delay of the entry speed of the sheet to zero is thus within a period of at most 5 ms.
  • the loading time can be changed in dependence on the arrangement and the distance of the actual brake body relative to the printed sheet.
  • the originally stated values apply to a maximum distance of approx. 10 mm between the brake body and the print sheet, which normally corresponds to an operating mode with different infeed and fold height of the print sheet, whereby the brake and the delivery cadence of the print sheet can be designed so that a "Scalloped" folding can be used, ie, the sheet to be folded is still on the folding table, while the subsequent sheet is fed over lying.
  • the distance between the brake and the printed product varies between 0 and approx. 3 mm. This means in this case that the proportion of the lowering of the brake, so the brake body, about 30% and the actual braking time about 70% of the total available braking time range.
  • the braking time is not significantly less than 5 ms, so that whenever possible, the lowering movement should not exceed 3 ms.
  • Sonach can each be achieved by a single modeled braking force gentle safe and accurate local positioning of the individual sheets, which is of crucial importance for the subsequent processing of this sheet.
  • a body is provided as a means of conversion of the force-determining pulse produced by an air jet nozzle, which body in principle has further complementary elements which enable an efficiency-maximized air jet deflection.
  • the speed of the air flow from the air jet nozzle is almost supersonic, assuming a turbulent flow, ie of the order of magnitude of approximately 316 m / s. In a laminar flow, this speed can be increased to about 500 m / s. This is the case, for example, when the flow structure of the air jet nozzle is designed as a Laval nozzle.
  • This air jet deflecting body is preferably disposed above the transported sheet and is directly in operative connection with a flexible cantilevered element whose compliance respectively. Spring constant for the transferability of the contact force on the sheet draws. The underside of this flexible element thus exerts one through the air jet The force pulse generated by the air jet deflecting body from a pressure force on the sheet, which contact force then comes as a direct braking force to bear, such that the recorded sheet can be braked immediately and fully to zero.
  • the pulse-receiving body preferably in the form of a shell, has an inner-body-side beam-deflecting structure, which is designed so that the air jet initially acts on the body centrally or along a focal plane, and then ordered, ie without turbulence, can flow out.
  • the formation of the air jet deflecting structure of this body is preferably formed either by a rotationally concave shape, or the body has air jet nozzle side, a central elongated edge, from which the air jet deflecting structure spreads wing-shaped downwards.
  • this central straight edge extends along a center of gravity of the body with respect to the two adjoining air jet deflecting vanes, which then also end in a concave shape, thus ensuring an ordered outflow of the introduced air mass and without any air-related interference on the respective printed sheets.
  • the air stream flows over the air jet deflecting structures of the body up to the concave ones or quasi-concave curvatures, from where the flow from the air jet nozzle is then finally deflected in the opposite direction to the flow of the original air jet.
  • the air pressure required for braking is calculated and the information sent to the automatic pressure regulator.
  • the printed sheets may have different values on the left and right sides. In such a constellation then the brake resp. whose braking effect are regulated accordingly.
  • this is triggered by a signal taking into account dead time and speed compensation. Then the air stored in the pressure accumulator is released suddenly, whereupon the air jet nozzle emits a pulse-like jet of air jet.
  • the pneumatic switching valve After delivery of the air pulse, the pneumatic switching valve is closed immediately and the pressure regulator fills the air reservoir again with the preset pressure and is available for the next cycle.
  • Operation with an air reservoir is, however, not indispensable:
  • the pulsed release of a certain amount of air under a certain pressure can also be achieved by a dynamically designed control, which provides directly for a continuous compressed air supply.
  • the injection of the air mass flow provided by the air jet nozzle is preferably carried out completely intermittently, i. she goes from zero to max. Pressure and then back to zero.
  • the body is, as mentioned, according to a preferred variant rotationally symmetric or quasi-rotationally symmetrical, supplemented with a protruding centrally located conical or nearly conical pillar, which projects beyond the shell of the body, and which formed streamlined from the top to the concave spout of the body is, so that it merges from top to bottom flow conforming in the predetermined concave shape in the rotationally symmetric body.
  • the centrally introduced from the air jet air mass is thus distributed uniformly in terms of flow in the circumferential direction of the centrally located conical or nearly conical column, and this air mass then flows while maintaining a maximized laminar flow in the concave recess of the body, then there by the imposed deflection of the desired Impulse power. Consequently, these conditions fulfill those requirements which lead to a largely lossless energy transfer.
  • the sheet brake according to the invention on which this is based includes further advantageous effects, which go beyond the precisely instantaneous braking effect on the printed sheet by also ensuring at the same time by such a sheet brake that there is no collision point at the sheet trailing edge located on the folding table can occur with the next sheet.
  • Important in this configuration is the underlying operational basis, according to which the next sheet is fed higher than the surface of the folding table.
  • such a separating edge does not necessarily have to run parallel to the feed direction of the transported printing sheet, but can also run across it as needed.
  • cup-shaped Strahlumlenkungsharm can be formed without a centrally arranged flow-consistent column, and the lateral walls of the shell can then form a not completely rotationally symmetric body readily.
  • the printing sheet brake according to the invention can also be used advantageously in operative connection with a high-performance folding device.
  • the printed sheet is thus braked with exact position by means of the printing sheet brake according to the invention and then at the same time has the exact position in the feed direction, if necessary with the introduction of a stop acting there. Accordingly, it is ensured with the operation of the printing sheet brake according to the invention that the signature trailing edge is located on the folding table and thus no collision point with the subsequent printing sheet can occur.
  • the follow-on sheet can be slightly increased immediately after the start of the folding process on a by the conveyor belts Feed position to be supplied.
  • the printing sheet brake according to the invention it is possible not to handle the printed sheets in a scaly manner, in particular because the time requirement of the sheet brake can be reduced to a minimum, namely to ⁇ 10 ms. That is, the gap of the products to each other based on a time constant, which is then dependent on the production speed of the printing press, the resulting number of cycles, and the sheet-related section length, these conditions can be fully recovered by the inventive brake operationally.
  • the following printing sheet is already above the trailing edge of the preceding printing sheet (overlapping), which already moves in the direction of the folding roller pair by initiation of the folding pulse.
  • the overlying signature which is still clamped in the feeder belts, performs a guiding function with respect to the sheet to be folded by preventing the underlying sheet from rising due to the accelerations, thus reducing the known quality-reducing effects (whipping effect, donkey ears). can be prevented.
  • Essential in the invention is therefore the training of the device and its operation for braking a transported and flat formed product.
  • An essential implementation of the invention relates here to apparatus and method for braking printed products, preferably of printed sheets, wherein it is logically in this case a brake sheet in the brake.
  • this device is designed as a brake operable by air jet, which is operated by an air jet nozzle supplied by an air jet, said brake has at least one body which by the action of the air jet, ie by its impulse force, a braking effect on the printed product, so that this body par excellence makes the active immediate brake.
  • the body itself consists of at least one first element, which is preferably cup-shaped, this shell shape ensures by its physical configuration, a continuing beam deflecting flow of the supplied air jet.
  • this body acting as a brake is supplemented with at least one second element, which is responsible for the subsequent implementation of the impulse force by this second element is preferably designed as a flexible tab, which is preferably diametrically opposite to the arrangement of the first Element is clamped on one side, and this second element by the triggered by the air jet to the first element pulse set undergoes a converted by the respective spring constant bending towards the printed product, whereupon the entire braking effect of the first element can be converted to the printed product.
  • braking force effect on the printed product which are preferably also arranged by two bodies, which are preferably spaced transversely to the transport direction, also known as feed direction of the printing sheet, and these braking force-releasing body are operated simultaneously in time by each at least one air jet.
  • At least two bodies which can be operatively operated side by side can also be provided at each braking location, which bodies alternately exert their braking force at least per printed sheet. If, for example, two arranged braking locations are provided per printed sheet, the number of individually active bodies then increases to four. Here, too, preferably at least one air jet nozzle per body is provided.
  • the main advantage of such a disposition and the alternating operation of the bodies with one another is that the number of cycles can be substantially increased thereby providing an inherent redundancy, and that the wear of the valves can be substantially minimized.
  • the air jet nozzle is characterized by a single centrally located opening through which the jet of air exits supersonically. If an increase in the flow velocity of the air jet is intended here, this can be easily achieved by forming the opening as a Laval nozzle.
  • the air jet nozzle may have at least one further opening which serves as a complementary air mass flow-emitting opening, which preferably fulfills the function of an attenuation aid.
  • the shell underlying it is rotationally symmetrical, the interior of which has a concave shape relative to the air jet emitted by the air jet nozzle, so that the air jet can exert an optimal impulse force on the shell and then flow unhindered.
  • this has a centrally located conical or nearly conical column over which the jet of air emitted by the air jet flows smoothly in the concaved interior space, and within this concave interior after implementation of the impulse force to a Heilstrahlumlenkung and then it comes to a backflow.
  • the centrally arranged conical or nearly conical column should preferably be formed from top to bottom by a sidecut which is modeled so that it merges seamlessly into the concavely formed interior of the shell.
  • This air jet deflection then experiences an efficiency-maximized return flow through the described concave shape of the shell, which takes place optimally by 90 ° to ⁇ 180 ° relative to the air mass flow from the air jet nozzle.
  • the first element should not only be designed as a shell, but this element may also have an open structure, which has on the upper side a central projecting edge, from which extends to the second element extending on both sides of this edge air-jet deflecting wing-like structure, said edge, based on a predetermined transport direction of a product, can take any orientation.
  • At least the second formed as a lug element of the brake with an on-demand having spring constant is operatively connected to at least one pneumatic damping arrangement and / or with mechanically operated damping elements, which are all designed so that they are able, a swinging motion of this second element after voll 1500ter To effectively dampen brake movement.
  • the invention also relates to a method for operating the described device for decelerating a transported and flat product, preferably a printed product, in particular a printed sheet, wherein the device is designed as a brake operable by air jet, wherein the brake by one of at least one air jet
  • the brake is operated at least by a body which exerts a braking force on the product by the action of the air jet, the brake being operated in operative connection with a downstream folding device, and wherein the brake is operated simultaneously is applied to fix the product by the braking force on the product trailing edge, in such a way that space is created, whereby a collision with the subsequent product is bypassed.
  • FIG. 1 shows an overall view of the sheet brake 100, which is aligned to the representation of a single braking power unit. It is readily possible, as needed, to provide several units, which may be placed at different times to each other, which then exert the braking force on the located on the folding table 200 sheet A in a predetermined cycle.
  • the braking force acting on the printed sheet is preferably effected by two bodies 120, which are preferably spaced apart from one another within the width of the printed sheet and transversely to the feed direction 300 thereof.
  • at least one air jet nozzle 110 should be provided per body.
  • At least one air jet nozzle 110 is preferably provided per body 120.
  • the main advantage of such a disposition is certainly that the operation of the two or more sibling body 120 can take place alternately, so that the number of cycles can be significantly increased, and thus that an inherent redundancy is created, whereby the rate of wear for the operation the brake force acting body 120 valves can be substantially minimized.
  • the illustrated sheet brake 100 is supported by a support 101, which must have a maximized stability, so that the anchored there further elements of the sheet brake 100 by the high cycle numbers of the machine have a minimized vibration susceptibility.
  • the support 101 has an intermediate anchoring 102 for the attachment of an air jet nozzle 110, the air jet is directed against the other components of the sheet brake 100, these components are arranged above the transport plane of the sheet A, as well as concise from the Figures 2 and 4 evident.
  • first element 120 designed that acts essentially as an independent aggregate: this essentially consists, on the one hand, of a flexible component which acts as a flat tab 121 is formed, whose material or material composition or combination of materials has a tuned spring constant in dependence on the braking force to be applied, and further comprises the first element 120 of a cup-shaped member 122 which is in operative connection with the tab 121, wherein the shell 122 directly from the Air jet 400 from the air jet nozzle 110 is acted upon.
  • the introduced from the air jet nozzle 110 air jet 400 (see also FIG. 3 ) generated by the action of the air jet 400 is that the flexibly flat formed tab 121 bends down and thus exerts a contact pressure on the arranged below by the delivery sheet A (by its impulse force par excellence the braking force effect of the sheet brake 100 par excellence see also FIG. 2 ).
  • the first flexible element 120 consists of the component shown in the form of a flexible tab 121 and a shell 122 placed thereon, the concave inner shape of the shell 122 ensuring a continuous jet deflecting flow of the supplied air jet 400.
  • This air jet deflecting shell 122 is disposed above the transported sheet A and is, as already explained, directly in operative connection with the flexible clamped tab 121, which is preferably anchored on one side 123, so that their compliance can fully implement, which depends on the spring constant Compliance for the transmission of the contact pressure on the sheet draws. Accordingly, the underside of this flexible tab 121 exerts a force applied by the air jet on the air jet deflecting shell 122 force in the form of a pressing force on the sheet A, which contact force then comes as a direct braking force to bear, such that the detected sheet A instantaneously within less ms is slowed down to zero.
  • This tab 121 can be coated on the underside, so the sheet side, with a coating that effectively supports the deceleration of the sheet.
  • the shell 122 is the end of the tab 121 and diametrically the one-sided clamping 123 of this tab 121, whereby the possible flexibility of this tab can be maximized.
  • the first flexible element 120 is operatively connected to a second element 130 formed as a mechanical damping element 131.
  • This second element 130 has the shape of a rigid bar 133, and it is then also anchored on one side 132: in the example shown, this bar 133 is also connected at the place of anchoring of the flexible tab 121 for reasons of space.
  • the end of the beam 133 arranged damping element 131 basically fulfills a damping effective function, which counteracts any swinging movement of the flexibly designed tab 121 after performing braking.
  • the damping element 131 is to be made of a material which dampens particularly vibrations, so that the oscillatory movements of the flexible tab 121 can be abruptly damped.
  • This damping element 131 is advantageously arranged in the immediate vicinity of the shell 122 in order to maximize its damping effect.
  • FIG. 2 shows an overall circuit for the operation of the brake according to FIG. 1 , It can be seen in this figure, first, the complementary element in connection with the concave shell 122 (see also FIG. 3 ) and the flexible tab 121. Below the concave shell 122 is the actual folding table 200 with a printing sheet A symbolically illustrated thereon, wherein the braking force introduced on the printing sheet is operationally in operative connection with the sheet A delivered in the feeding direction 300.
  • the positionally accurate positioning of the braked sheet A is crucial for quality assurance, in particular with respect to the subsequent operations.
  • This quality assurance can be maximized by supplementing the system with a sheet stop 260, which takes action at the very last stage of braking, and ensures that any possible misalignment caused by transport or, if necessary, application of the braking force can be definitely compensated 100% ,
  • the sheet stop 260 may consist of a body that covers substantially the entire infeed width of the signature or a number of spaced apart body portions. It is obvious that there is an interdependence between remanence speed and not fully utilizing the braking effect.
  • FIG. 2 further shows the elements that underlie the pneumatic control / regulation of the brake.
  • a higher-level control unit 210 is operative here, in which information flows in and emanates commands. Important information relates to the detection 251 of the delivered printed sheet A via a light barrier 250. This information 252 is forwarded to the control unit 210 which, by means of stored or continuously adjusted control profiles, ensures that the braking effect comes into effect if the relevant printed sheet determines the operative position reached before the sheet stop 260. This includes that via a control line 221 a command to the pressure regulator 220 passes, which is in operative connection 222 with a downstream pressure accumulator 230, which in turn is in operative connection 231 with a switching valve 240.
  • This valve 240 receives at a given time from the control unit 210 via a further control line 211 a command to take action, and to provide that amount of air to the air jet nozzle 110 for the implementation of the braking effect.
  • the amount of air flows through a compressed air line 241 and then out of the air jet nozzle 110 at high pressure and velocity as a jet 400 and urges the concave shell 122, through which the braking force is then transferred to the signature A in operative connection with tab 121, taking into account the dynamics described above in connection with the sheet stop 260.
  • the circuit of the pneumatic switching valve 240 this is triggered by the mentioned signal taking into account dead time and speed compensation. Then the air stored in the accumulator 230 air is released suddenly, whereupon the air jet nozzle 110 then emits a pulse-like air jet. After delivery of the pulse-like air jet, the pneumatic switching valve 240 is immediately closed and the pressure regulator 220 fills the pressure accumulator 230 again with the preset pressure and is then available for the next cycle.
  • FIG. 3 3 shows the three-dimensional image of the concave shell 122, which is for the implementation of the air jet amount 400 flowing from the high-impingement jet nozzle 110.
  • the underlying body is rotationally symmetrical, the interior of which is concave with respect to the air jet 400 emitted by the air jet nozzle 110, so that the air jet 400 exerts an optimum momentum force on the shell 122 and then can flow out of it again unhindered.
  • this has a centrally arranged conical or nearly conical column 124, via which the air jet 400 emitted by the air jet nozzle 110 flows in a flow-homogeneous manner into the concave interior, and within this concave interior after reaction the impulse force comes to an air jet deflection 410.
  • This underlying flow homogeneity can be increased if the shell 122 is supplemented by a centrally arranged conical or nearly conical column 124, which projects beyond the uppermost edge of this shell 122.
  • the centrally arranged conical or nearly conical column 124 should preferably be formed from top to bottom by a sidecut 125 which is modeled so that it merges seamlessly into the subsequently concaved interior 126 of the shell 122 ,
  • this air jet deflection experiences an efficiency-maximized return flow 410, which takes place optimally by 90 ° to ⁇ 180 ° with respect to the air jet 400 from the air jet nozzle 110.
  • FIG. 4 shows another air jet deflecting body 150, which performs substantially the same function as the shell 122 already described several times.
  • This body 150 which in FIG. 5 is shown in three dimensions, has a central projecting edge 151 on top.
  • the flanks on both sides run along an air-jet-deflecting wing-like structure (see FIG. 5 , Pos. 152) downwards, and extend into the region of a flexible tab 121 operatively acting thereunder, wherein this edge, in relation to a predetermined feed direction 300 of a product A in general, can take any orientation.
  • the brake is not limited only to the deceleration of individual sheets, but is readily possible to provide on the folding table 200 multi-layer sheet A "for immediate deceleration and for further processing.It should also be noted that the backflow 420 in this body 150 will tend to be shallower with respect to the shell (122) FIG. 2 described sheet stop 260 and the corresponding feed direction 300 of the printed products A n .
  • FIG. 5 thus shows the body 150 in three-dimensional view.
  • the upper side of the body has a rather pointed edge 151 which sharply divides the air jet 400 from the air jet nozzle, whereupon these partial air streams 420 flow away on both sides of the body 150.
  • the body 150 has an air-jet-deflecting wing-like structure 152 downwards, which then merges into a concave-like shape at the end, a backflow also occurs here due to the applied impulse force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Discharge By Other Means (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP19159033.0A 2018-02-28 2019-02-25 Frein à feuille d'impression Active EP3533738B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2402018 2018-02-28

Publications (3)

Publication Number Publication Date
EP3533738A2 true EP3533738A2 (fr) 2019-09-04
EP3533738A3 EP3533738A3 (fr) 2019-09-11
EP3533738B1 EP3533738B1 (fr) 2021-03-10

Family

ID=61568998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19159033.0A Active EP3533738B1 (fr) 2018-02-28 2019-02-25 Frein à feuille d'impression

Country Status (5)

Country Link
US (1) US10934119B2 (fr)
EP (1) EP3533738B1 (fr)
JP (1) JP7266421B2 (fr)
CN (1) CN110203745B (fr)
ES (1) ES2875796T3 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3002240A1 (fr) 2014-10-01 2016-04-06 Müller Martini Holding AG Dispositif d'arret de feuille d'impression
EP3002241A1 (fr) 2014-10-01 2016-04-06 Müller Martini Holding AG Dispositif d'arret de tirage oblique pour une feuille imprimee

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053150A (en) * 1976-03-08 1977-10-11 Cornelius Printing Co. Folder apparatus
FR2546818B1 (fr) * 1983-06-06 1987-03-20 Marinoni Harris Sa Dispositif pour ralentir les exemplaires dans un pli d'equerre de plieuse utilisee en relation avec les presses rotatives
DE4307383A1 (de) * 1993-03-09 1994-09-15 Jagenberg Ag Vorrichtung zum Abbremsen von Bögen, insbesondere von Papierbögen
DE4322324C2 (de) * 1993-07-05 2002-01-17 Heidelberger Druckmasch Ag Bogentransport und Bogenführung im Auslagebereich von Rotationsdruckmaschinen
DE19527441C2 (de) 1995-07-27 1998-01-29 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum pneumatischen Bogenabbremsen im Ausleger einer Bogenrotationsdruckmaschine
JP2932436B1 (ja) 1998-06-24 1999-08-09 松本機械製作株式会社 枚葉印刷機械のデリバリーシートブレーキ装置
DE19921169C2 (de) 1999-05-07 2003-03-13 Roland Man Druckmasch Vorrichtung zum Abbremsen von Papierbögen
US20070096382A1 (en) * 2005-11-01 2007-05-03 Tetsuo Komori Sheet convey apparatus
JP5696553B2 (ja) 2011-03-25 2015-04-08 凸版印刷株式会社 不良刷り本排出装置
JP7316058B2 (ja) * 2018-02-28 2023-07-27 ミュラー・マルティニ・ホルディング・アクチエンゲゼルシヤフト 逐次的に印刷された印刷用紙の次処理をするための装置及び方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3002240A1 (fr) 2014-10-01 2016-04-06 Müller Martini Holding AG Dispositif d'arret de feuille d'impression
EP3002241A1 (fr) 2014-10-01 2016-04-06 Müller Martini Holding AG Dispositif d'arret de tirage oblique pour une feuille imprimee

Also Published As

Publication number Publication date
JP2019151488A (ja) 2019-09-12
EP3533738B1 (fr) 2021-03-10
US20190263618A1 (en) 2019-08-29
CN110203745B (zh) 2023-02-14
JP7266421B2 (ja) 2023-04-28
EP3533738A3 (fr) 2019-09-11
CN110203745A (zh) 2019-09-06
US10934119B2 (en) 2021-03-02
ES2875796T3 (es) 2021-11-11

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