EP3533738B1 - Frein à feuille d'impression - Google Patents

Frein à feuille d'impression Download PDF

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Publication number
EP3533738B1
EP3533738B1 EP19159033.0A EP19159033A EP3533738B1 EP 3533738 B1 EP3533738 B1 EP 3533738B1 EP 19159033 A EP19159033 A EP 19159033A EP 3533738 B1 EP3533738 B1 EP 3533738B1
Authority
EP
European Patent Office
Prior art keywords
air jet
way
printed sheet
braking
jet nozzle
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.)
Active
Application number
EP19159033.0A
Other languages
German (de)
English (en)
Other versions
EP3533738A2 (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 device for braking a transported and flat product of different thickness and material composition according to the preamble of claim 1 and a method for operating such a device according to claim 32.
  • the changes in direction of the printed sheet parts injected by various folding processes generally cause high deceleration and acceleration values on the printed 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 print sheet parts have a negative effect on the product quality and the stability of the folding process.
  • the braking force-releasing air impulses are directed directly to the printed sheet and develop their effect there or. implement, whereby the number, strength and place of action of these air impulses can be adapted to the given conditions.
  • the air impulses that trigger the braking force act on at least one mechanical element which is arranged intermediately between the printed sheet and the nozzle of the air pulse, in such a way that the effective braking effect on the printed sheet then takes place through said mechanical element, one such Element can have different dynamic configurations.
  • the two effective braking forces i.e. the braking force-triggering impulses on the printed sheet, be they operated directly or indirectly, as well as the increase in friction through a further braking force, can be controlled interdependently or independently of one another, with the braking force portion of the two changing or changing from case to case . can be customized.
  • an additional braking force can also be achieved by at least one mechanically activatable element, which, for example, can be used for fine adjustment in addition to the pneumatic braking force-releasing pulses acting on the printed sheet, such a mechanical element being easily carried out by an autonomous control or, in the above sense, purely by air pulses can be operated.
  • EP3002241 A1 also shows a braking device which is designed as a cross-pull brake for a printed sheet.
  • This also involves a method for braking and positioning the printed sheet in the feed direction as well as for delaying the printed sheet during the folding-in and / or against the fluttering movements that occur when the printed sheet is drawn in, and this is achieved by the following process steps: i) On the basis of the specified Production data such as folding scheme, paper weight, paper width, section length, the air pressure required for braking is calculated and the information is sent to the automatic pressure regulator, taking into account that depending on the folding scheme, the printed sheet can have different values on the left and right side; ii) A pressure accumulator with a pressure regulator ensures the physical values of the compressed air required; iii) The printed sheet entering / fed into the folding area is detected at the rear edge by means of a light barrier, this light barrier simultaneously serving to synchronize the folding blade with exact timing, the light barrier compensating for irregularities within the transport of the printed sheet; iv
  • the braking devices belonging to the prior art are preferably designed for interdependent braking systems, the braking effect of which is provided by different auxiliary units, with different braking techniques and with different controlled braking resp. Impulse forces are designed.
  • the invention aims to provide a remedy here.
  • the invention is based on the object of proposing a highly efficient brake, preferably for products of a general type, preferably for printed products, in particular for printed sheets, which are provided by an impulse Braking force is operated, which is provided by an injected pneumatic medium, and which is able to exert an efficient braking force on a body by transmitting an impulse force, which body then exerts the braking force directly on the product, whereupon an immediate braking effect arises.
  • the brake according to the invention is therefore preferably used for printed products, without, however, exclusively wanting that the brake according to the invention can easily be used for other flat-shaped transportable products of different thickness and material composition.
  • the brake according to the invention is therefore focused in the following on the braking effect on printed sheets.
  • the precise positioning of the braked printed sheet is crucial for quality assurance, especially with regard to the subsequent operations.
  • This quality assurance can be maximized by adding a print sheet stop to the system, which comes into action in the very last phase of braking and ensures that any misalignment caused by the transport or the implementation of the braking force can definitely be compensated 100% .
  • the printed sheet stop can consist of a single body which largely covers the entire infeed width of the printed sheet, or it can consist of a number of body parts that are spaced apart from one another. It is obvious that there is an interdependence between the retentive speed of the printed sheet and not fully exhausting the braking force during its implementation.
  • the final positioning of the printed sheet is thus determined with the aid of a printed sheet stop, but regardless of this it must be ensured in any case that the printed sheet is at its remanence speed only hits the stop surface of this printed sheet stop very gently. Since this remanence speed, as stated, turns out to be microscopic, there is also no risk that the front edge of the printed sheet in the delivery direction will be injured when it hits the stop surface or spring back or spring back from this stop surface. could jump back.
  • This smoothly executed process with regard to the end position of the printed sheet also has the advantage that the printed sheet can adapt completely to the course of the stop surface (s), which results in a definite, maximized, precise alignment of the printed sheet, this precise alignment of the printed sheet then for Quality assurance in subsequent operations is crucial.
  • the distance between the brake and the printed product varies between 0 and approx. 3 mm. In this case, this means that the proportion of the lowering movement of the brake, i.e. of the brake body, is approx. 30% and the actual braking time is approx. 70% of the total available braking time.
  • the braking time is not significantly less than 5 ms, so that the aim should always be that the lowering movement is not greater than 3 ms.
  • the air jet deflecting structure of this body is preferably formed either by a rotationally concave shape, or the body has a central elongated edge on the air jet nozzle side, from which the air jet deflecting structure spreads downward in a wing shape.
  • this central elongated edge runs along a plane of the center of gravity of the body opposite the two adjoining air jet deflecting wings, which then also merge into a concave shape at the end, which also ensures an orderly outflow of the air jet mass and this consequently without air-related interference on the respective printed sheets transported underneath.
  • the air jet flows over the air-jet-deflecting structures of the body 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 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 through a dynamic control system, which directly ensures a continuous supply of compressed air.
  • the air mass introduced centrally from the air jet nozzle is distributed uniformly in terms of flow in the circumferential direction of the centrally arranged conical or almost conical column, and this air mass then flows into the concave recess of the body while maintaining a maximized laminar flow, in order to then achieve the desired To exert impulse power.
  • these flow characteristics meet those requirements which lead to a largely loss-free energy transfer.
  • the printing sheet brake on which the invention is based includes further advantageous effects that go beyond the instantaneous braking effect on the printing sheet, in that such a printing sheet brake also ensures at the same time that there is no collision point at the rear edge of the printing sheet on the folding table can occur with the subsequent printing sheet. What is important with this configuration is the underlying operational basis, according to which the subsequent printing sheet is fed higher than the surface of the folding table.
  • such a separating edge does not necessarily have to run parallel to the infeed direction of the transported printed sheets, but can also run transversely to the same if necessary.
  • the shell-shaped beam deflection body can also be designed without a centrally arranged, flow-conforming column, and the side walls of the shell can then easily form a body that is not completely rotationally symmetrical.
  • the printing sheet brake according to the invention can also advantageously be used in operative connection with a high-performance folding device.
  • the printed sheet is therefore braked in a positionally precise manner by means of the printed 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, the operation of the printing sheet brake according to the invention ensures that the rear edge of the printing sheet is on the folding table and thus no collision point with the subsequent printing sheet can occur.
  • the subsequent printing sheet can be increased slightly via the conveyor belts immediately after the start of the folding process Feed position are fed.
  • the printing sheet brake according to the invention makes it possible not to process the printing sheets in a shingled manner, in particular because the time required by the sheet brake can be reduced to a minimum, namely to ⁇ 10 ms. This means that the gap between the products is based on a time constant, which then depends on the production speed of the printing machine, the resulting number of cycles, and the sheet-related section length, whereby these conditions can be fully operationally absorbed by the brake according to the invention.
  • the subsequent printing sheet is already above the trailing edge of the preceding printing sheet (overlapping), which is already moving in the direction of the pair of folding rollers when the folding pulse is initiated.
  • the printed sheet on top which is still clamped in the feed belts, has a guiding function in relation to the printed sheet to be folded by preventing the printed sheet below from rising up as a result of the accelerations, which has the well-known quality-reducing effects (whip effect, donkey ears) can be prevented.
  • the design of the device and its operation for braking a transported and flat product is therefore essential to the invention.
  • An essential implementation of the invention relates here to the device and method for braking printed products, preferably printed sheets, the brake in this case consequently being a printed sheet brake.
  • this device is designed as a brake that can be operated by an air jet, which is operated by an air jet brought in by an air jet nozzle, this brake having at least one body which, through the action of the air jet, ie through its impulse force, implements a braking effect on the printed product, so that this body is simply the active, immediate brake.
  • the body itself consists of at least one first element, which is preferably designed in the shape of a shell, this shell shape ensuring a continuing jet-deflecting flow of the supplied air jet due to its physical configuration.
  • 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, in that 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 experiences a bend towards the printed product due to the set of impulses triggered by the air jet on the first element, whereupon the entire braking effect of the first element can be implemented on the printed product.
  • braking force effect on the printed product which is preferably also arranged by two bodies, which are preferably spaced apart from one another transversely to the transport direction, also called the delivery direction, of the printed sheet, and these braking force-releasing bodies are operated simultaneously by at least one air jet nozzle each.
  • At least two bodies which can be operatively operated next to one another and which alternately exert their braking force at least per printed sheet can also be provided at each braking location. If, for example, two arranged braking locations are provided per printed sheet, the number of individually active bodies then increases to four.
  • at least one air jet nozzle is preferably provided per body.
  • the air jet nozzle is characterized by a single centrally arranged opening through which the air jet exits at supersonic rate. If the aim here is to increase the flow speed of the air jet, this can be easily achieved by forming the opening as a Laval nozzle.
  • the air jet nozzle can, however, have at least one further opening which serves as a complementary air mass flow-emitting opening, which preferably fulfills the function of a damping aid.
  • the shell on which it is based is designed to be rotationally symmetrical, the interior of which has a concave shape compared to the air jet emitted by the air jet nozzle, so that the air jet exerts an optimal impulse force on the shell and can then flow out unhindered.
  • the shell In order to maximize the efficiency of the flow inside the shell, it has a centrally arranged conical or almost conical column, over which the air jet emitted by the air jet nozzle flows homogeneously into the concave interior space, and within this concave interior space after conversion of the impulse force to an air jet deflection and then there is a backflow.
  • the centrally arranged conical or almost conical column should be formed from top to bottom, preferably by a waist, which is modeled so that it merges seamlessly into the concave interior of the shell.
  • This air jet deflection then experiences an efficiency-maximized return flow due to the described concave shape of the shell, which is optimally 90 ° to 180 ° compared to the air mass flow from the air jet nozzle.
  • the first element should not only be able to be designed as a shell, but this element can also have an open structure, which on the top has a central protruding edge from which an air jet deflecting wing-like structure extending on both sides of this edge extends up to the second element, this edge being able to assume any orientation with respect to a predetermined transport direction of a product.
  • At least the second element of the brake designed as a tab, with a required spring constant is in operative connection with at least one pneumatic damping device and / or with mechanically operable damping elements, all of which are designed so that they are capable of oscillating this second element after completion Efficiently dampen braking movement.
  • the invention also relates to a method for operating the described device for braking a transported and flat product, preferably a printed product, in particular a printed sheet, the device being designed as a brake that can be operated by an air jet, the brake being actuated by one of at least one air jet nozzle brought air jet is operated, wherein the brake is formed at least by a body which exerts a braking force on the product through the action of the air jet, wherein the brake is operated in operative connection with a downstream folding device, and the brake is operated so that simultaneously To fix the product, the braking force acts on the rear edge of the product in such a way that space is created so that a collision with the following product is avoided.
  • Figure 1 shows an overall overview of the printed sheet brake 100, which is based on the representation of a single braking force generating unit. Depending on requirements, it is readily possible to provide a plurality of units which can be placed differently from one another and which then exert the braking force on the printed sheet A located on the folding table 200 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 same in the infeed direction 300.
  • At least one air jet nozzle 110 should preferably be provided per body.
  • braking force-acting bodies 120 which can be operatively operated next to one another and which exert their braking force alternately at least per printed sheet A at each braking location. If, for example, two arranged braking locations are provided per printed sheet, the number of individually active bodies 120 increases to four.
  • 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 subordinate bodies 120 can take place alternately, so that the number of cycles can be increased significantly, and that consequently an inherent redundancy is created, which reduces the wear rate for the operation the valves responsible for the braking force-acting body 120 can be substantially minimized.
  • the illustrated printing sheet brake 100 is carried by a support 101, which must have maximized stability so that the further elements of the printing sheet brake 100 anchored there have a minimized susceptibility to vibrations due to the high cycle rates of the machine.
  • the support 101 has an anchoring 102 as an intermediate for attaching an air jet nozzle 110, the air jet of which is directed against the other components of the printing sheet brake 100, these components being arranged above the transport plane of the printing sheet A, as is also clearly shown in FIG Figures 2 and 4th emerges.
  • first designed element 120 which essentially functions as an independent unit: This essentially consists, on the one hand, of a flexible component, which is a flat tab 121 is formed, the material or material composition or material combination has a coordinated spring constant depending on the braking force to be exerted, and furthermore, the first element 120 consists of a shell-shaped component 122 which is in operative connection with the tab 121, the shell 122 being directly from the Air jet 400 from the air jet nozzle 110 is applied.
  • the air jet 400 introduced by the air jet nozzle 110 (see also Figure 3 ) generates the braking force of the printing sheet brake 100 par excellence through its impulse force, whereby the shell 122 consists, due to the effect of the air jet 400, that the flexible, flat flap 121 bends down and thus exerts a contact pressure on the printing sheet A arranged underneath by the infeed ( see also Figure 2 ).
  • the first flexibly designed 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 arranged above the transported printed sheet A and, as already explained, is directly in operative connection with the flexible clamped tab 121, which is preferably anchored on one side 123 so that its flexibility can be fully implemented, this being dependent on the spring constant Flexibility for the transfer of the contact pressure to the printed sheet is characterized. Accordingly, the underside of this flexible flap 121 exerts a force pulse in the form of a pressure force on the printed sheet A due to the force pulse applied by the air jet via the air jet deflecting shell 122, which pressure force then comes into effect as a direct braking force, in such a way that the detected printed sheet A is instantly inside less ms is decelerated to zero.
  • This tab 121 can be covered with a coating on the underside, that is to say on the printing sheet side, which effectively supports the braking of the printing sheet.
  • the shell 122 is arranged at the end of the tab 121 and diametrically to the one-sided restraint 123 of this tab 121, whereby the possible flexibility of this tab can be maximized.
  • the first flexibly designed element 120 is in operative operative connection with a second element 130, which is designed as a mechanical damping element 131.
  • This second element 130 has the shape of a rigid beam 133, and it is then also anchored on one side 132: in the example shown, this beam 133 is also connected to the location of the anchoring of the flexible tab 121 for reasons of space.
  • the damping element 131 arranged at the end of the beam 133 basically fulfills a damping function which counteracts any swinging movement of the flexibly designed tab 121 after braking has been carried out.
  • the damping element 131 should consist of a particularly vibration-damping material, so that the oscillating movements of the flexible tab 121 can be abruptly dampened.
  • This damping element 131 is advantageously arranged in the immediate vicinity of the shell 122 in order to maximize its damping effect.
  • Figure 2 shows an overall circuit for the operation of the brake according to Figure 1 .
  • the complementary elements in connection with the concave shell 122 (see also FIG Figure 3 ) and the flexible tab 121.
  • the concave shell 122 Below the concave shell 122 is the actual folding table 200 with a printed sheet A symbolically represented thereon, the braking force applied to the printed sheet being operationally connected to the printed sheet A introduced in the delivery direction 300.
  • the precise positioning of the braked printed sheet A is crucial for quality assurance, in particular with regard to the subsequent operations.
  • This quality assurance can be maximized by adding a print sheet stop 260 to the system, which comes into action in the very last phase of braking and ensures that any misalignment caused by transport or implementation of the braking force can definitely be compensated 100% .
  • the printing sheet stop 260 can consist of a body which largely covers the entire infeed width of the printing sheet, or it can consist of a number of body parts that are spaced apart from one another. It is obvious that there is an interdependence between the retentive speed and the braking effect that is not fully utilized.
  • the final positioning of the printed sheet A is determined with the aid of a printed sheet stop 260, but regardless of this, it must be ensured in any case that the printed sheet A with its remanence speed only hits the (full) stop surface 261 of the printed sheet stop 260 very gently . Since this remanence speed turns out to be microscopically small, as explained, there is also no risk that the front edge of the printed sheet A in the infeed direction 300 will move when it strikes the stop surface 261 hurt or this spring back from stop surface 261 or. could jump back.
  • FIG. 2 also shows the elements on which the pneumatic control / regulation of the brake is based.
  • a higher-level control unit 210 is operative here, into which information flows and commands emanate from it.
  • An important piece of information relates to the detection 251 of the delivered print sheet A via a light barrier 250.
  • This information 252 is passed on to the control unit 210, which uses stored or continuously adapted control profiles to ensure that the braking effect is activated when the relevant print sheet is in the operative position has reached 260 before the signature stop.
  • This includes that a command is sent to the pressure regulator 220 via a control line 221, 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 a command from the control unit 210 via a further control line 211 to take action and to make that amount of air available 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 as a jet 400 at high pressure and speed out of the air jet nozzle 110 and acts on the concave shell 122, via which the braking force is then transmitted to the printed sheet A in operative connection with the tab 121, taking into account the dynamics described above in connection with the signature stop 260.
  • the switching of the pneumatic switching valve 240 is concerned, this is triggered by the aforementioned signal, taking into account dead time and speed compensation.
  • the air stored in the pressure accumulator 230 is then suddenly released, whereupon the air jet nozzle 110 then emits a pulse-like air jet.
  • the pneumatic switching valve 240 is closed immediately and the pressure regulator 220 fills the pressure accumulator 230 again with the preset pressure and is then available for the next cycle.
  • Figure 3 shows the three-dimensional image of the concave shell 122, which stands for the conversion of the air jet quantity 400 flowing out of the air jet nozzle 110 with high impulse force.
  • the body on which it is based is designed to be 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 optimal impulse force on the shell 122 and then can flow out again 410 therefrom unhindered.
  • the shell 122 In order to best manage the braking force-releasing flow inside the shell 122, it has a centrally arranged conical or almost conical column 124, over which the air jet 400 emitted by the air jet nozzle 110 flows homogeneously into the concave interior space, and within this concave interior space after implementation the impulse force comes to an air jet deflector 410.
  • This underlying flow homogeneity can then be increased if the shell 122 is supplemented by a centrally arranged conical or almost conical column 124 which protrudes beyond the uppermost edge of this shell 122.
  • the centrally arranged conical or almost conical column 124 should be formed from top to bottom, preferably by a waist 125, which is modeled in such a way that it merges seamlessly into the subsequently concave interior 126 of the shell 122 .
  • This air jet deflection then experiences an efficiency-maximized return flow 410 due to the described concave shape of the shell, which is optimally 90 ° to 180 ° with respect to the air jet 400 from the air jet nozzle 110.
  • FIG 4 a further air jet deflecting body 150 emerges, which essentially fulfills the same function as the shell 122 already described several times.
  • This body 150 which is in Figure 5 is further illustrated three-dimensionally, has a central protruding edge 151 on the top.
  • the flanks on both sides follow an air jet deflecting wing-like structure (see Figure 5 , Pos. 152) downwards, and extend into the area of a flexible flap 121 operatively acting underneath, wherein this edge, in relation to a predetermined infeed direction 300 of a product A in general, can assume any orientation.
  • the brake is not only limited to braking individual printed sheets, but is easily possible to provide multi-layer printed sheets A n on the folding table 200 for immediate braking as well as for further processing. It should also be noted that the return flow 420 in this body 150 will tend to be flatter compared to the shell (122). This figure also shows the already under Figure 2 The printing sheet stop 260 described and the corresponding infeed direction 300 of the printed products A n .
  • Figure 5 accordingly shows the body 150 in a three-dimensional view.
  • the body has a rather pointed edge 151 on the upper side, which sharply divides the air jet 400 from the air jet nozzle, whereupon these partial air jets 420 flow off on both sides of the body 150. Since the body 150 has an air jet deflecting, wing-like structure 152 which then merges into a concave-like shape at the end, a back flow is also created here due to the impulse force exerted.

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  • 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)

Claims (32)

  1. Dispositif pour freiner un produit (A, An) transporté et de configuration plane de différentes épaisseurs et compositions de matériaux, le dispositif étant réalisé sous la forme d'un frein (100) actionnable par un jet d'air (400), lequel peut être actionné par un jet d'air (400) amené par une buse à jet d'air (110), le jet d'air frappant un corps (120) qui, par l'effet du jet d'air (400), convertit une force de freinage exercée sur le produit, caractérisé en ce que le corps (120) convertisseur de force de freinage est formé par au moins un premier élément (122), lequel possède une structure physique pour un flux de retour (410, 420) du jet d'air (400) acheminé depuis la buse à jet d'air (110), et en ce que le corps (120) est pourvu d'au moins un deuxième élément (121), lequel se trouve en liaison fonctionnelle avec le premier élément (122) lors de la conversion en force de freinage, et lequel deuxième élément (121) convertit la force d'impulsion provoquée par le jet d'air (400) de la buse à jet d'air (110) en une force de freinage résultante sur le produit (A, An).
  2. Dispositif selon la revendication 1, caractérisé en ce que le produit (A, An) est un produit imprimé, notamment une feuille imprimée.
  3. Dispositif selon la revendication 1, caractérisé en ce que le frein (100) est un frein à feuilles imprimées.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la force de freinage qui agit sur les feuilles imprimées (A, An) est appliquée par deux corps (120), lesquels sont disposés de telle sorte qu'ils sont espacés l'un de l'autre et transversalement par rapport à la direction d'approche (300) de la feuille imprimée (A, An) .
  5. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce qu'au niveau de chaque emplacement de freinage sont disposés au moins deux corps (120) actionnables de manière opérationnelle, lesquels exercent leur force de freinage en alternance au moins à l'intérieur d'un cycle.
  6. Dispositif selon l'une des revendications 4 ou 5, caractérisé en ce que chaque corps (120) peut être sollicité respectivement par au moins une buse à jet d'air (110).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le frein (100) et sa force de freinage se trouvent en liaison fonctionnelle avec une butée de feuille imprimée (260), en ce que la butée de feuille imprimée (260) possède une surface de butée (261) qui sert d'arête de référence de la feuille imprimée (A, An) freinée dans la direction d'approche (300).
  8. Dispositif selon la revendication 1, caractérisé en ce que la buse à jet d'air (110) possède au moins une ouverture centrale.
  9. Dispositif selon la revendication 1, caractérisé en ce que la buse à jet d'air (110) peut être actionnée avec une fréquence supersonique.
  10. Dispositif selon la revendication 1, caractérisé en ce que la buse à jet d'air (110) est réalisée sous la forme d'une buse à effet Laval.
  11. Dispositif selon la revendication 8, caractérisé en ce que la buse à jet d'air (110), outre une première ouverture centrale, possède au moins une deuxième ouverture centrale complémentaire à celle-ci.
  12. Dispositif selon la revendication 1, caractérisé en ce que le premier élément (122) du corps (120) se compose d'une coque à symétrie de rotation, dont l'espace intérieur (126) est de configuration concave par rapport au jet d'air (400) émis par la buse à jet d'air (110), de telle sorte que le jet d'air (400) exerce une force impulsionnelle sur la coque (122).
  13. Dispositif selon la revendication 12, caractérisé en ce que la coque (122) possède une colonne (124) conique ou quasiment conique disposée au centre, par le biais de laquelle le jet d'air (400) émis par la buse à jet d'air (110) s'écoule en un écoulement homogène dans l'espace intérieur (126) de configuration concave, et il devient, à l'intérieur de cet espace intérieur concave, un flux de retour (410, 420) après la transformation de la force impulsionnelle par renvoi du jet d'air.
  14. Dispositif selon la revendication 13, caractérisé en ce que le flux de retour (410, 420) du jet d'air (400) émis par la buse à jet d'air (110) se produit à 90° jusqu'à ≥ 180° par rapport au jet d'air (400) issu de la buse à jet d'air (110).
  15. Dispositif selon la revendication 13, caractérisé en ce que la colonne (124) conique ou quasiment conique disposée au centre fait saillie au-dessus du bord supérieur de la coque (122).
  16. Dispositif selon la revendication 13, caractérisé en ce que la colonne (124) conique ou quasiment conique disposée au centre possède du haut vers le bas un profilage (125) qui suit un tracé tel qu'il se transforme sans transition dans l'espace intérieur (126) de configuration concave de la coque (122).
  17. Dispositif selon la revendication 1, caractérisé en ce que le premier élément est formé par un corps d'écoulement (150) qui, du côté supérieur, possède une arête (151) saillante au centre de laquelle s'étend, jusqu'au deuxième élément (121), une structure (152) de déflexion de jet d'air, de préférence en forme d'aile, qui suit un tracé des deux côtés de l'arête.
  18. Dispositif selon la revendication 17, caractérisé en ce que l'arête (151) saillante au centre du corps d'écoulement (150) possède une orientation quelconque par rapport à une direction d'approche (300) prédéfinie d'un produit (A, An), de préférence un produit imprimé, notamment une feuille imprimée.
  19. Dispositif selon la revendication 1, caractérisé en ce que le deuxième élément (121) porte le premier élément (122, 150) d'un côté et, de l'autre côté, est bloqué de manière flexible au-dessus du produit, en ce qu'une flexion du deuxième élément (121) a lieu sous l'effet de l'impulsion émanant du jet d'air (400) sur le premier élément (122, 150), de telle sorte que du fait de cette flexion, le côté inférieur du deuxième élément (121) exerce une force de pressage sur le produit (A, An).
  20. Dispositif selon la revendication 19, caractérisé en ce que le deuxième élément (121) est réalisé sous la forme d'une languette flexible de configuration plane.
  21. Dispositif selon la revendication 20, caractérisé en ce que la languette (121) possède des cavités.
  22. Dispositif selon la revendication 20, caractérisé en ce que la languette (121) se compose d'un matériau qui présente une constante de ressort accordée par rapport à la force de freinage à exercer.
  23. Dispositif selon la revendication 22, caractérisé en ce que la constante de ressort peut être modifiée par une structure en lame multicouche de la languette (121).
  24. Dispositif selon la revendication 1, caractérisé en ce qu'au moins le deuxième élément (121) se trouve en liaison fonctionnelle avec au moins un dispositif d'amortissement (130) superposé qui est dirigé contre un mouvement d'oscillation du deuxième élément (121) après un mouvement de freinage mené au bout.
  25. Dispositif selon la revendication 24, caractérisé en ce que le dispositif d'amortissement (130) se compose d'une barre (133) ancrée du côté de l'extrémité (132) et d'éléments d'amortissement (131), lesquels sont de préférence disposés dans la zone du premier élément (122, 150) .
  26. Dispositif selon la revendication 1, caractérisé en ce que le premier (122, 150) et/ou le deuxième élément (121), à des fins d'amortissement, peuvent être sollicités par des forces pneumatiques contre un mouvement d'oscillation après avoir effectué le freinage.
  27. Dispositif selon la revendication 26, caractérisé en ce qu'un jet d'air servant à des fins d'amortissement est amené directement sur l'ouverture principale de la buse à jet d'air (110).
  28. Dispositif selon la revendication 26, caractérisé en ce que le jet d'air servant à des fins d'amortissement est amené depuis une ouverture principale secondaire de la buse à jet d'air (110).
  29. Dispositif selon la revendication 26, caractérisé en ce que le jet d'air servant à des fins d'amortissement est amené depuis un arrangement de petits orifices qui sont disposés en forme de couronne autour de l'ouverture principale de la buse à jet d'air (110).
  30. Dispositif selon la revendication 1, caractérisé en ce que le frein (100) peut être actionné de telle sorte qu'il peut agir simultanément pour bloquer le produit (A, An) par la force de freinage sur l'arête arrière de produit, de telle sorte qu'il est ainsi possible de créer de la place pour éviter une collision avec un produit qui suit.
  31. Dispositif selon la revendication 1, caractérisé en ce que le frein (100) peut être actionné en liaison fonctionnelle avec un dispositif de pliage monté en aval.
  32. Procédé pour faire fonctionner un dispositif pour freiner un produit transporté et de configuration plane de différentes épaisseurs et compositions de matériaux, le dispositif possédant un frein (100) qui est actionné par un jet d'air (400) amené par au moins une buse à jet d'air (110), le frein (100) étant formé par au moins un corps (120) par le biais duquel une force de freinage est exercée sur le produit (A, An) au moyen de l'effet du jet d'air (400), le corps (120) convertisseur de force de freinage étant constitué d'au moins un premier élément (122) ayant une structure physique, structure par laquelle est formé un flux de retour (410, 420) du jet d'air (400) acheminé depuis la buse à jet d'air (110), le corps (120) étant pourvu d'au moins un deuxième élément (121), lequel se trouve en liaison fonctionnelle avec le premier élément (122) lors de la conversion en force de freinage, et la force d'impulsion provoquée par le jet d'air (400) issu de la buse à jet d'air (110) étant convertie par le deuxième élément (121) en une force de freinage résultante sur le produit (A, An).
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

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

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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)

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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
BR102015024454A2 (pt) 2014-10-01 2016-05-24 Müller Martini Holding AG freio extrator transversal para folha de impressão
BR102015024953A2 (pt) 2014-10-01 2016-04-12 Müller Martini Holding AG freio para folha de impressão
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

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Publication number Publication date
US20190263618A1 (en) 2019-08-29
JP2019151488A (ja) 2019-09-12
EP3533738A2 (fr) 2019-09-04
CN110203745B (zh) 2023-02-14
US10934119B2 (en) 2021-03-02
ES2875796T3 (es) 2021-11-11
EP3533738A3 (fr) 2019-09-11
JP7266421B2 (ja) 2023-04-28
CN110203745A (zh) 2019-09-06

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