EP0317932B1 - Steuervorrichtung für Vorschub und Lage von Briefumschlägen in einer Kuvertiermaschine - Google Patents

Steuervorrichtung für Vorschub und Lage von Briefumschlägen in einer Kuvertiermaschine Download PDF

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Publication number
EP0317932B1
EP0317932B1 EP88119337A EP88119337A EP0317932B1 EP 0317932 B1 EP0317932 B1 EP 0317932B1 EP 88119337 A EP88119337 A EP 88119337A EP 88119337 A EP88119337 A EP 88119337A EP 0317932 B1 EP0317932 B1 EP 0317932B1
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EP
European Patent Office
Prior art keywords
envelope
motor
envelopes
control device
insertion station
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Expired - Lifetime
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EP88119337A
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English (en)
French (fr)
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EP0317932A1 (de
Inventor
Jean-Pierre Meur
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Alcatel Satman SA
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Alcatel Satman SA
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Publication of EP0317932A1 publication Critical patent/EP0317932A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43M—BUREAU ACCESSORIES NOT OTHERWISE PROVIDED FOR
    • B43M3/00—Devices for inserting documents into envelopes
    • B43M3/04—Devices for inserting documents into envelopes automatic
    • B43M3/045—Devices for inserting documents into envelopes automatic for envelopes with only one flap

Definitions

  • the present invention relates to machines for inserting folds into envelopes and carries, in such machines, the control of advance and positioning of envelopes.
  • an envelope destacker at the exit of an envelope store ensures that the envelopes are removed from the store one by one.
  • a device for transferring empty envelopes ensures the transfer of the separate envelopes to a station for inserting folds in said envelopes.
  • envelopes are stopped and kept open.
  • the folds to be put in envelopes which can be in the form of single sheets or bundles are, after suitable folding in a folder and optionally prior or subsequent assembly in bundles in a collator, delivered successively to the machine.
  • a fold transfer device or insertion device proper ensures the transfer of the successive folds it receives and their insertion in the respective envelopes at the insertion station.
  • a loaded envelope ejection device ensures the evacuation of each loaded envelope to allow a new insertion.
  • the object of the present invention is to carry out an order envelope advance and positioning system that is fast, precise and reliable, and executed during a sequence assigned to this command, and which allows the evacuation of loaded envelopes and the supply of envelopes insertion station empty, with precise packaging and positioning of each empty envelope received, for variable rates of insertion cycles and fold sizes and therefore different envelopes.
  • said first management means ensure an envelope advance on said transfer path to a quasi-final envelope position in the insertion station and said speed control and management circuit of said motor is further equipped, on the one hand, with second means for detecting a second indicator on a second defined clock signal of said ejection and supply sequence, for controlling the drive of the motor and triggering a second drive phase known as positioning phase, when said second indicator appears, and, secondly, second means for managing said positioning phase by detecting engine pitch, triggered by said second indicator, to detect a second number of steps of the motor translating a distance of advance between said quasi-final position and said final position.
  • said stepping motor is at a speed made variable during said advance phase executed with a given acceleration of the steps of the motor, from a starting frequency to a maximum frequency where the speed is maintained, and a deceleration inverse triggered on detection of a third number of motor steps less than the first number with respect to which it is defined, and at a speed made constant during said positioning phase executed at a constant frequency of motor steps maintained substantially at the frequency of departure.
  • said speed control and management circuit of said motor is a programmed circuit.
  • FIG 1 there is given a schematic elevation view of an automatic insertion machine into which enters the device for controlling the advance and positioning of envelopes according to the present invention.
  • the overall constitution of this machine is in accordance with that resulting from the two aforementioned patent applications of the applicant.
  • the pleat insertion station 1 is illustrated by a simple straight line segment, in phantom, substantially tangent to two rollers 20 and 40 or two sets of rollers, not strictly speaking belonging to this station but arranged side by side by defining on their periphery, vertically at their center distance, the entry 10 of the plan of the insertion station .
  • These rollers will be specified below, during the description of the devices 2 and 4 to which they actually belong.
  • This line segment defines the plane for inserting folds in envelopes.
  • the device for transferring empty envelopes 2 is as such a known general organization, which conforms to that described in the applicant's patent application FR-86 07472, entitled “Device for opening envelopes ". A brief description of this device is simply incorporated in the context of this machine.
  • This empty envelope transfer device 2 feeds the insertion station and ensures the opening of the flaps of the envelopes transferred to the insertion station. It comprises a chute 21 for the arrival of empty envelopes, which is substantially horizontal, supplied by empty envelopes separated from one another. These separate empty envelopes come from a folder mounted on the outlet of envelopes from a store, which are not illustrated. They are routed along this chute 21 which couples the aforementioned destacker to the transfer device 2. In the chute 21, the envelopes are received with their upper edge, to which the flap is attached, at the bottom of the chute.
  • This device 2 comprises a controlled drive roller, known as an extraction roller, 22 and an associated extraction extraction roller 23, arranged above the chute 21, to receive between them the lower edge or lower part of the successive envelopes present in the chute and routed to their level. It further comprises a controlled output drive roller, which is the aforementioned roller 20 mounted at the entrance to the insertion station 1. This outlet roller 20 is mounted above the rollers 22 and 23, in coming to give the envelope leaving the device 2 a suitable curvature for its entry into the insertion station; it is in practice associated with a pressure roller, not illustrated for overload reasons.
  • the extraction counter roller 23 is carried on a pivoting arm 24 controlled according to the double arrow 24F by an electromagnet not shown, between a rest position distant from the extraction roller 22 and an extraction position for which it is in pressure against the extraction roller.
  • the central axis of the chute In the rest position of the extraction counter roller, the central axis of the chute is substantially tangent to this extraction counter roller in the extraction position of the extraction counter roller the median axis of the chute comes to cut its periphery so as to give a curve to the envelope taken between the rollers 22, 23.
  • a pallet 26 mounted under the extraction roller ensures the retention of the half-opened envelope flap and its unfolding and complete opening, during extraction of the envelope from the chute 21.
  • the chute 21 is U-shaped, with one of its legs truncated.
  • the back of the envelope with the half-open flap faces the largest leg of the chute. This chute makes it possible to favor the curve given to the envelope, as soon as it escapes the smallest leg of the chute, and the yawning of its flap.
  • a motor 27 drives the extraction and output rollers 22 and 20 which constitute the means for transferring empty envelopes along the transfer path, as well as the roller 40; the links in dashed lines 28 illustrate the couplings between the motor 27 and the rollers 22 and 20 and the roller 40.
  • This motor is controlled from the control assembly 5. It belongs to the advance and positioning control device envelopes according to the invention which is specified below.
  • the transfer path for empty envelopes which extends from the chute 21 to the inlet 10 of the insertion station is designated by the reference 25.
  • the chute 21 constitutes the entrance to the transfer path where the envelopes arrive separated from each other awaiting transfer to the insertion station. It is adjustable in height, according to the double arrow associated with it; it allows an empty envelope to be placed on hold which on the one hand rests at the bottom of the chute and on the other hand is interposed between the roller 22 and its counter roller 23 then in the rest position, whatever the format of the envelope awaiting.
  • a detector 29 ensures the detection of the presence of an envelope awaiting transfer, at a point 25A of the path 25, located between the bottom of the trough 21 and the roller 22 and its counter roller 23. This detector 29 is advantageously mounted remotely from point 25A and is coupled to an optical fiber 29A leading to this point 25A where it is associated with a transmitting cell.
  • This same detector 29 is also used for controlling the motor 27 as seen below.
  • the device 3 for inserting the folds in an envelope is supplied with folds separated from each other by a path for feeding the folds, defined by two sets of endless belts or bands 30A and 30B.
  • the belts are mounted tensioned between guide rollers, the only pair of end rollers of which, at the exit from the feed path, has been referenced by 31A, 31B. These two references are also used to designate the exit from the path for separate folds.
  • This path for bringing the folds can be fed by a folding machine which can itself be coupled to an upstream or downstream collator, which have not been illustrated.
  • the folds thus delivered, which are to be inserted in envelopes, consist of single folded sheets or of multiple sheets folded before or after assembly.
  • This device 3 comprises a fixed fold entry station constituted by a fixed fold receiving tray 32, mounted under the outlet 31A, 31B which it extends towards the insertion station; this fixed plate 32 is slightly above the plane of the insertion station 1 and is distant from this station.
  • the device 3 also includes a serving tray 33, located substantially in the plane of the insertion station, ensuring the transfer and insertion of the folds in envelopes.
  • This serving plate 33 is mounted, below the fixed plate, in a moving carriage back and forth according to arrow 33F. It is driven by a lever control 34 which is coupled to it, between a first limit position, for which it is practically retracted under the fixed plate 32, and a second limit position, for which it is partially in the insertion station 1 and is inserted in the envelope then present in this post.
  • the first position corresponds substantially to that in which it has been shown in solid lines, the second position is sketched in phantom.
  • This serving plate 33 or carriage carries a pair of push fingers 35, directly integral with the plate 33, fixed and projecting on this plate.
  • the push fingers 35 also project slightly above the plane of the fixed plate 32 which has for their effect, along its length, two windows not shown in FIG. 1, which are open at each end of the fixed plate.
  • These push fingers 35 each have a front spout 35A under which the folds are put to be taken and pushed by the fingers 35 during the movement of the carriage 33, illustrated by the arrow 33F, towards the insertion station.
  • the spout 35A of each push finger is fixed and comes from a profile given to each finger; it is just above the level of the fixed plate 32.
  • the device 3 furthermore, mounted above the fixed plate 32, folds retaining fingers 36, at the front of the fixed plate 32, and folding fingers 37 behind the fixed plate and just downstream from exit 31A 31B of the ply feed path.
  • These fingers 36 and 37 are coupled by a set of levers, shown diagrammatically by a dashed line link and designated under the general reference 38.
  • This set of levers 38 is itself coupled to a control electromagnet not illustrated, acting as symbolized by the arrow 39F, to simultaneously rotate the retaining fingers 36 and the folding fingers 37, according to the arrows 36F and 37F associated, at the same time and in the same direction from their normal position in the absence of control.
  • the retaining fingers 36 are in the transverse obstacle position in front of the fixed plate 32 and the folding fingers 37 in the erased position above the fixed plate, for the free arrival of the fold passing under the folding fingers and its retention on the fixed plate 32. They thus remain except during the transfer of the fold from the fixed plate 32 to the carriage.
  • the retaining fingers 36 are adjustable at the front of the fixed plate 32, according to the different fold formats.
  • the carriage 33 is also adjustable in width and in length to adapt to the different fold formats.
  • the device 3 is not described in more detail below. The precise arrangement of its elements and their set of control levers 38 is described more fully in the aforementioned patent application entitled "Device for inserting folds in envelopes" of the applicant.
  • the device for ejecting loaded envelopes 4 comprises the aforementioned roller 40 mounted with the roller 20 under the inlet 10 of the insertion station, which is the ejection drive roller.
  • This roller 40 like the roller 20, is in practice constituted by a set of rollers mounted on the same shaft.
  • the ejection device 4 further comprises a mechanism for bending the envelope to be evacuated from the insertion station, not globally referenced, a chute for receiving the envelope 41 and a guide 42 between the roller 40 and the chute 41 .
  • the guide 42 is mounted inclined under the insertion station and provides coupling between the insertion station, or more precisely its casing entry at the level of the roller 40, and the chute 41, when the cambering mechanism acts on the 'envelope.
  • This chute 41 also under the insertion station, is horizontal and extends parallel and at a short distance from the chute 21 belonging to the empty envelope transfer station 2.
  • the loaded envelopes evacuated from the insertion station are received with their lower edge, or foot, coming at the bottom of the trough 41.
  • This trough 41 is, like the trough 21, profiled in U, it has one of its truncated legs, and is equipped over its length with rollers not shown which ensure the drive of the loaded envelopes it receives, in the opposite direction to the drive of the empty envelopes in the chute 21.
  • the chute 41 is also adjustable in level, opposite the plane of the insertion station 1, to take account of the type of loaded envelopes to be removed.
  • a double arrow associated with this chute but not referenced illustrates its possible height adjustment, as for chute 21.
  • the mechanism for bending loaded envelopes has a counter roller 43 associated with the ejection roller 40 and pivotally mounted and pivoting camber fingers 44.
  • levers such as 145 are controlled around the articulation axis 45 simultaneously by a control lever 46.
  • This control lever 46 is itself controlled by two other levers, mounted integral on an axis 47 and designated together under the reference 147. These levers 147 couple the control lever 46 to a control rod 48. This rod 48 is actuated by the control mechanism 5.
  • the lever 46 is profiled substantially in an inverted U shape. It receives in abutment in its end part which is at the end of the device 4, one of the ends of the levers 147 coupling it to the connecting rod 48. It also receives, in abutment in its opposite end part, which is inside the device 4, the small legs of the L-shaped levers such as 145 for their control.
  • the ejection device 4 is carried by the hinge pin 47 and on a support pin 49, on which it is normally locked and unlockable by manual control. This ejection device 4 is not described in more detail below. The precise arrangement of its elements and their control means is described more fully in the aforementioned patent application entitled “Device for ejecting loaded envelopes and insertion machine by applying” from the applicant.
  • axis 49 has been shown twice, in the terminal parts opposite the ejection device 4 and the pleat insertion device 3. In practice, this is a single axis, but the pleat insertion device also supported by this axis has been shifted to the right of FIG. 1 for the sake of clarity in this FIG. 1.
  • the machine further comprises lugs 6, known as non-return lugs of the fold inserted in the envelope present at the insertion station 1.
  • These non-return lugs belong strictly speaking to the insertion device 3 but are mounted, for their control, as if they belonged to the ejection device 4. They are pivoted like the cambering elements by the control coming from the connecting rod 48 and transmitted from the lever 46 to individual L-shaped levers, such as 145, at end of the large jambs from which they are attached.
  • non-return tabs 6 are above the insertion station 1; they are opposite the envelope entry 10 of this insertion station and at the end of the insertion device 3.
  • the machine illustrated in FIG. 1, comprises, in addition to the devices 2, 3 and 4 and non-return lugs 6 mounted in the device 4, opening fingers 7 of the body of the envelope present at the insertion station .
  • opening fingers 7 like the non-return tabs 6 belong to the insertion device 3. They are mounted in front of the retaining fingers 36 while being just in front of the envelope entry of the station d 'insertion. They are formed at the end of individual supports 8 coupled at their other end by a hooking lug 8A to the same actuation lever 9.
  • the control assembly 5 essentially comprises a motor shaft 50, with cams, driven along the arrow 50A by a control motor 51.
  • This shaft 50 carries a first cam 52 assigned to control the ejection device 4 and called the cam 'ejection.
  • a so-called ejection roller 53 carried by an articulated lever 54 bears on the ejection cam 52.
  • This lever 54 articulated around a fixed axis 54A is also coupled to the connecting rod 48 for controlling the ejection device that she commands.
  • This same shaft 50 carries a second cam 55 assigned to control the opening fingers 7 and called the opening cam of the body of the envelope.
  • a roller called the opening control 56, bearing on the opening cam 55, is carried by a support lever 57.
  • This lever 57 is coupled to the lever 9, on a fixed hinge pin 57A, which it controls for actuating the opening fingers 7.
  • the shaft 50 also controls a rod-crank system, the crank 58 of which forms a flywheel wedged on the shaft and drives the rod 59.
  • This rod 59 is itself articulated on the lever 34 for controlling the carriage 33 for its training back and forth.
  • This lever 34 is coupled by one of its ends to the carriage and by its other end on a fixed hinge pin 34A. It is articulated substantially in its middle on the connecting rod 59 by a joint 34B.
  • This same shaft 50 further carries a disk 60 for coding the angular position of the shaft.
  • a photoelectric sensor illustrated at 62 gives this angular position.
  • This disc 60 has a plurality of identical and regularly spaced openings which are detected by the sensor 62 to give successive angular positions of the shaft 50 and a single larger opening also detected by the sensor to give a reference position. These openings are not referenced in FIG. 1, they are specified with reference to FIG. 2.
  • the sensor 62 has been shown coupled to a counter 65.
  • the controls of the machine illustrated in Figure 1 are provided from the control assembly 5 shown in more detail in Figure 2, according to control sequences defined relatively to each other for each insertion cycle.
  • the ejection cam 52 mounted on the motor shaft 50 has its periphery, against which the control roller 53 is kept under pressure, which essentially has three successive distinct parts denoted 101, 102 and 103 each occupying substantially a sector about 120 °.
  • Part 101 is circular and is the most prominent peripheral part.
  • the part 103 forms a flat on the ejection cam and is the least protruding.
  • the part 102 is intermediate and is itself in two parts of length close to one another, it has on the side of the part 101 a substantially linear portion 102A and on the side of the part 103 a substantially circular portion 102B.
  • Part 101 is said to be at rest
  • part 103 is said to be ejection and part 102 for transition between the two parts 101 and 103 facing the commands which they make it possible to transmit to the ejection device by the roller 53, the lever 54 and the connecting rod 48.
  • the flywheel 58 is rotatable with the shaft 50 which drives it; the connecting rod 59 - lever 34 system transforms the rotary movement of the flywheel 58 into an alternating movement transmitted to the trolley of the ply insertion device 3, giving the trolley a variable speed, along its travel going towards the insertion station , or its return stroke.
  • the opening cam of the body of the envelopes 55, mounted on the motor shaft 50, has its periphery against which the control roller 56 is kept under pressure which has two parts 105 and 106 both semi-circular but of different rays.
  • the part 105 is of significantly greater length than the other 106 but is on the other hand of smaller radius than that of the latter 106. These parts 105 and 106 are separated by substantially linear transitions for a quick change of control.
  • Part 105 is said to be of rest part 106 is said to be opening the body of the envelopes, opposite the commands which they make it possible to transmit to the opening fingers, by the roller 56 and the control lever 9.
  • this control lever 9 can also be pivotally actuated from an auxiliary cam 55A, analogous to cam 55 and also mounted on the shaft 50, but leading to a slight advance of the command which it can transmit to the lever 9.
  • This auxiliary cam has its associated roller 56A selectively actuated, in the pressure position against the cam 55A or retracted in front of the cam 55A, by an electromagnet control assigned for this purpose, not illustrated.
  • This roller 56A being in the retracted position, only the cam 55 is active on the lever 9, when the roller 56A is however under pressure on its cam 55A, the two cams 55 and 55A are active on the lever 9: the start of their combined action is given by cam 55A and the end by cam 55.
  • these two cams 55 and 55A are mounted on either side of the coding disc 60.
  • the coding disc 60 also mounted on the motor shaft 50 which drives it with the cams 52, 55 and 55A, allows relative positioning of the cams and of the flywheel 58 very precise for the progress over time of the mechanical controls which arise. It also makes it possible, from all the control sequences defined relatively to each other for each insertion cycle, to control the sequence of sequences from mechanical controls relative to the sequence of sequences from electronic commands given from sensor 62, by generation clock signals in synchronism with the mechanical controls performed for each rotation of the motor shaft 50.
  • This disc 60 has for this purpose a series of small openings such as 61A, formed with regular pitch, in the vicinity and on almost all of its periphery with the exception of a small interval which is free from it.
  • the disc 60 is shown with 55 small openings 61A and with this small interval corresponding to 5 missing openings.
  • the sensor 62 is a double sensor, with two emitting cells with which two receiving cells are associated, respectively.
  • One of the sensors, 62A, of this double sensor, is mounted to the right of the small openings 61A.
  • This disc 60 also has a long opening 61B, which is formed slightly more inside the disc than the small openings 61A and which extends at least in part opposite the gap free of openings 61A.
  • the second sensor 62B of the double sensor 62 is mounted to detect this longer opening 61B.
  • the second sensor 62B of the double sensor 62 gives a clock signal denoted H0 which translates an angular reference or rest position, for the machine, each time the long opening 61B passes in front of the sensor 62B.
  • This second sensor is shown coupled to a reset input 65B of the counter 65.
  • This clock signal Ho corresponds to a small number of signals such as H1, H2, H3 ... H55, it has a duration between 2 and 5 of these latter signals, to allow a sufficient stop range to be given to the shaft 50, when the machine stops.
  • the longest opening 61B extends opposite the terminal opening 61A giving rise to the signal H55 and extends with regard to a part of the interval free of openings 61A; this part corresponds here to 3 of the 5 missing openings.
  • the sensor 62B is angularly offset from the sensor 62A, in a corresponding manner, that is to say 2 steps from the clock H1 to H55. This offset catches up with the non-centering of the longest opening 61B over the entire gap free of openings 61A.
  • This sequence comes from the mechanical command given by the cam 52 and extends from the signal H24 to H54. During this sequence the non-return tabs 6 are in the low position.
  • Sequence 4 known as the ejection and supply sequence for the envelope insertion station:
  • this sequence begins on signal H41 and extends substantially to signal H8 for large envelopes or to signal H11 for small envelopes.
  • the insertion cycles take place one after the other with their essential sequences which overlap or overlap each other.
  • the machine starts they are preceded by an initialization cycle, bringing an empty envelope to the insertion station and a fold on the fixed input tray and during which the parameters related to the format of the folds then concerned are taken into account. .
  • an initialization cycle bringing an empty envelope to the insertion station and a fold on the fixed input tray and during which the parameters related to the format of the folds then concerned are taken into account.
  • FIG. 3 the device for advancing and positioning envelopes according to the invention is shown diagrammatically, which executes the advance and envelope positioning sub-sequence during the aforementioned sequence 4, for each insertion cycle.
  • This device comprises the motor 27, which is a stepping motor controlled at variable speed by a microprocessor 70, through an electronic power control circuit 71 which supplies the motor windings with current pulses.
  • An input register 72 is connected on the one hand to the sensor 62 coupled to the control unit 5 of the machine according to FIGS. 1 and 2 and which generates the clock signals H in synchronism with the sequence of the sequences and d on the other hand to the detector 29 of the transfer device 2 of the machine according to FIG. 1. It constitutes an input interface circuit, for the transmission of data on the bus 73 of the microprocessor.
  • This input register 72 has a decoding input 72A to which an activation clock signal HA is applied every milliseconds.
  • An output register 74 constitutes an output interface circuit, for the transmission and maintenance of the commands received from the bus 73 and applied in particular to the power circuit 71. It has a decoding input 74A to which is applied a signal d HB activation clock at each step of motor 27 and every 15 ms.
  • the stepping motor is, in the embodiment describes a motor with bipolar stators, the two stator windings of which are shown in 27A and 27B. It has defined kinetic characteristics, such as its number of steps per revolution of its axis, of 200, its starting frequency, 150 Hz, and its maximum step frequency after regular acceleration, of 1200 Hz.
  • the output register 74 has four outputs connected to the power circuit 71 and assigned to the commands of the stepping motor, on which are delivered, in the form of logic levels, the signals denoted (27A) and (27B) for controlling the one and the other of the two windings and the values Io and Is of their supply current. It also has an additional output on which a signal (24F) for controlling the extraction position of the counter roller 23 of the device 2 of the machine according to FIG. 1 is delivered. This signal (24F) is amplified in a amplifier 75 and applied to the electromagnet shown in 24A for actuating the support arm of this counter roller.
  • the power circuit 71 has a group of transistors associated with each winding. It is of the type as such known and is therefore not described. It makes it possible to control the time of rise of the current in the windings of the motor, without using additional resistances, in order to limit the calorific energy dissipated, the average consumption and the current coming from logic control passing in the windings.
  • the microprocessor includes the aforementioned counter 65 receiving the signals H delivered by the sensor; in the microprocessor, it consists of a table of values in which one progresses, from the value 0 on the signal from the sensor 62B, at the rate of the signals from the sensor 62A.
  • phases 3 and 1 are combined to allow very high machine insertion cycle rates to be obtained. If there is no empty envelope waiting phase 3 is the only phase performed. The complete progress of this sub-sequence will be specified below with reference to the organization chart of the program which ensures its order.
  • phase 1 and 3 are triggered with regard to specific indicators, for phases 1 and 3 combined and for phase 2 and by type of envelope.
  • specific indicators are obtained in the microprocessor 70 from the table of stored values, the analysis of which is made by progression in the table at the rate of the pulses Ho to H55, for each insertion cycle, and from a comparator receiving these successive table analysis values and values previously selected and saved.
  • FIG. 4 the management of speed of the stepping motor carried out by the microprocessor is illustrated on the one hand for the execution of phases 1 and 3 and on the other hand for the execution of phase 2.
  • the curves P1 (PE) and P1 (GE) illustrate the variation of the frequency F of the steps of the motor, during phases 1 and 3, for the advance of the small and large envelopes, respectively, along from their transfer path.
  • This variation of the frequency F is given, from a certain position of the envelope on its path which is detected, as a function of the number n of steps of the motor.
  • This advance is evaluated in motor step.
  • the detection of this advance of the envelope beyond point 25A avoids any adaptation of the execution of phases 1 and 3 according to the dimensions of the envelopes. It is obtained directly in the microprocessor from the commands of the power circuit of the engine it generates.
  • n 156, which leads to the deceleration command, at a value slightly lower than that necessary to achieve the end of deceleration when the envelope is placed in the desired quasi-final position, allows the slow arrival of the envelope in this quasi-final position and its instantaneous stop.
  • the curve P2 translates the execution of phase 2 whatever the dimensions of the envelopes.
  • n1 and n2 the numbers of steps of the engine necessary for the advance of the envelope concerned from its position awaiting transfer until its end of passage at point 25A of the transfer path.
  • These numbers n1 and n2 are known but not necessarily detected except during the execution of phase 1 during an initialization cycle of the machine, when it is started up.
  • This third number of steps is not used for managing the speed of the motor but for a command delivered by the microprocessor during phases 1 and 3 in advance.
  • This third number corresponds to a certain arrival of any envelope, small or large, at the level of the roller 20 and its counter roller.
  • the electromagnet for actuating the support arm of the extraction roller 23 is reset to zero by the microprocessor, for setting the retracted position of rest of this extraction roller.
  • the different values of the number of motor steps detected which lead to commands during the course of phases 1 to 3, are, like the previous indicators I1 and I2, obtained in the microprocessor by analysis of a table of values. This analysis is done at the rate of the engine steps, from the commands generated by the microprocessor. Comparisons between each of the selected values indicated above and the successive values from each of the corresponding tables define the commands to be performed.
  • the envelope advance and positioning sequence takes place under the control of a control program assigned to this effect and contained in the microprocessor.
  • FIG. 5 represents the flow diagram of this control program.
  • the number 1 means yes, the number O means no.
  • the execution of actions and instructions from operation 81 corresponds to a sub-sequence belonging to a first cycle or initialization cycle of the machine.
  • the advance of an empty envelope is only ensured, with simultaneously detection of the number of steps, n1 or n2, from the start of its advance to at the end of its passage at point 25A of the transfer path.
  • the detection of n1 or n2 not in the microprocessor determines the type of envelopes used and ensures the selection of the pair of indicators I1 and I2 then concerned, for the established regime.
  • FIGS. 6 to 9 which are partial views of the machine according to FIG. 1, various stages of the advance control and of positioning of the empty envelopes have been illustrated. at the insertion station.
  • the advance of the envelopes once loaded, which is carried out at the same time as the advance of the empty envelopes, is not illustrated to avoid overloading in these figures.
  • the inlet 10 of the insertion station defines a slightly projecting edge above the plane of the insertion station 1. This edge is formed by the end of a guide plate 11 at the outlet of the path 25 for transferring empty envelopes, leading to a folding of a support sheet 12. This edge 10 is substantially centered perpendicular to the middle of the center distance of the rollers 20 and 40.
  • FIG. 6 shows the position of the elements concerned during the decision operation 94, according to the flow diagram of FIG. 5, for which an empty envelope 110 is detected present awaiting transfer Under these conditions, this same empty envelope has been previously detected during operation 90 and gave rise to the control of the counter roller in the extraction position, according to action 91 of the flowchart.
  • the empty envelope rests, by the fold edge 111 of its flap 112 with the body 113 of the envelope, at the bottom of the trough 21 and is taken by its opposite end part between the roller 22 and its counter roller 23. It is ready to be transferred to the insertion station 1 in which the previous envelope 110 which has been transferred has received a fold 115 and is free for its evacuation. None of the elements of the machine then obstructs the evacuation of the loaded envelope which will be carried out, during the execution of action 85, with the advance of the empty envelope, according to phase 1 of the command subsequence.
  • FIG. 7 shows the position of the same elements at the end of the execution of action 85 of the flow diagram of FIG. 5.
  • the empty envelope 110 is stopped in its quasi-final position in the insertion station 1 , at a distance of 11 steps from the motor from its final position, according to the numerical example indicated above.
  • the terminal part of the front face of the body of the envelope 113 which is adjacent to the flap 112 currently open and stretched and no longer making visible the fold edge which it has with the body of the envelope, rests on the edge 10 of the entry of the insertion station 1. Under these conditions, this terminal part leaves yawn the ends noted 114 of the front wall of the body of the envelope which are slightly upstream of the edge 10, in front of the opening fingers 7 which are still in the retracted position.
  • the yawning of the ends 114 creates an entry gap for the retaining fingers in the body of the envelope to promote easy re-entry of these opening fingers, the advance of which in the body of the envelope begins slightly before the action 89 and the maintenance in the body of the envelope is prolonged with this action.
  • FIG. 7 also shows that, during the execution of the action 85, the extraction counter roller 23 has been returned to the retracted rest position, to allow the arrival of a new empty envelope in the chute 21 and its stop, between the extraction roller against the retracted rest position and the extraction roller, awaiting transfer to the insertion station.
  • FIG. 8 shows the position taken by the elements at the end of the execution of action 89 of the flow diagram of FIG. 5.
  • the empty envelope 110 is stopped in its final position in the insertion station. It has the fold edge 111 of the flap 112 with the body of the envelope 113 which rests on the edge 10 of entry of the insertion station and which has, due to the edge 10 and the retention of the flap 112 between the roller 20 and its associated counter roller 20A, a fold that is opposite to that of the natural one that it has on the body of the envelope.
  • the opening fingers 7 have finished advancing and are held in the envelope at the same time as the final positioning of this envelope. Their advance is greater than that of placing the envelope in final position to keep it open. This open maintenance of the body of the envelope extends beyond the action 85, to allow the insertion of the carriage 33, which advances synchronously towards the insertion station, in the envelope opened with the fold 115 that he is wearing.
  • FIG. 9 shows the position of the same elements opposite the output o of the decision operations 90, for which an envelope is not detected present awaiting transfer. Under these conditions, the extraction counter roller 23 remains in the retracted rest position opposite the roller 22; we are waiting for the appearance of the selected indicator I1. During this wait, the carriage 33 is fully engaged with the fold 115 that it carries in the envelope 110, passing under the opening fingers 7 still engaged in the body of the envelope and keeping it open.
  • the carriage and the opening fingers will subsequently withdraw from the loaded envelope which will then be ready to be evacuated, when the indicator I1 appears according to operation 93, by performing action 97.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Controlling Sheets Or Webs (AREA)

Claims (21)

  1. Einrichtung zur Steuerung des Vorrückens und Positionierens von Umschlägen in einer Kuvertiermaschine, mit Transfermitteln für leere Umschläge entlang eines Transportweges, der an den Einlaß einer Kuvertierstation angeschlossen ist, und mit Mitteln zum Auswerfen der in der Kuvertierstation gefüllten Umschläge, wobei diese Mittel während einer Folge, Auswerf- und Zufuhrfolge genannt, gesteuert werden, die zu einer Gesamtheit von Steuerfolgen der Maschine gehört, die für jeden Kuvertierzyklus relativ zueinander definiert sind, dadurch gekennzeichnet, daß die Einrichtung weiter aufweist:
    - einen Schrittmotor (27), der in gemeinsamer Kupplungsverbindung mit den Transfer- und Auswerfmitteln (20, 22, 48) zu deren gemeinsamem Antrieb steht,
    - einen Taktkreis (60, 62), der für jeden Zyklus Taktsignale (H) synchron mit dem Ablauf der Gesamtheit der Folgen erzeugt,
    - einen Detektor (29) zur Erfassung der Anwesenheit eines Umschlags (29) an einem Zwischenpunkt (25A) des Transportwegs (25), und
    - einen Kreis (70) zur Steuerung und Regelung der Geschwindigkeit des Schrittmotors, der an den Taktkreis und den Anwesenheitsdetektor für die Umschläge zum Empfang von deren Ausgangssignale angeschlossen ist und der zum einen mit ersten Mitteln (93) zur Erfassung eines ersten Indikators (11) in einem ersten definierten Taktsignal (H45, H47) der Auswerf- und Zufuhrfolge ausgestattet ist, um beim Auftreten des ersten Indikators den Antrieb des Motors zu bewirken und eine ersten Antriebsphase, "Vorrückphase" (P1) genannt, auszulösen, und der zum anderen mit ersten Mitteln (85) zur Regelung der Vorrückphase durch Erfassung des Schritts des Motors ausgestattet ist, welche durch das Ausgangssignal des Anwesenheitsdetektors ausgelöst wird, der das Ende des Durchlaufs des Umschlags zu dem Zwischenpunkt anzeigt, um eine erste festgesetzte Anzahl von Schritten des Motors zu erfassen, die in Bezug auf den Abstand zwischen dem Zwischenpunkt und dem Einlaß der Kuvertierstation definiert sind, und um das Stillsetzen des Motors bei Erreichen der erfaßten ersten Anzahl von Schritten des Motors zu veranlassen.
  2. Steuereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Schrittmotor (27) ein Motor mit variabler Geschwindigkeit ist.
  3. Steuereinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die erste Schrittanzahl des Motors den Vorschub des Umschlags seit dem Ende des Durchlaufs am Zwischenpunkt bis zu seinem quasi endgültigen Instellungbringen repräsentiert, das in bezug auf den Einlaß (10) der Kuvertierstation (10) definiert ist, wobei der Einlaß (10) der Kuvertierstation die Endstellung des Umschlags definiert.
  4. Steuereinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Geschwindigkeitssteuer- und -regelkreis (70) des Motors weiter zum einen mit zweiten Mitteln (88) zur Erfassung eines zweiten Indikators (I2) in einem zweiten definierten Signal (H11, H8) der Auswerf- und Zufuhrfolge ausgestattet ist, um beim Auftreten des zweiten Indikators (I2) den Antrieb des Motors zu bewirken und eine zweite Antriebsphase, Positionierungsphase (P2) genannt, auszulösen, und zum anderen mit zweiten Mitteln zur Regelung der zweiten Positionierungsphase (P2) durch Erfassen des Schritts des Motors ausgestattet ist, wobei die Mittel durch den zweiten Indikator (I2) ausgelöst werden, um eine zweite Anzahl von Schritten des Motors zu erfassen, welche einen Vorrückabstand zwischen der quasi endgültigen Stellung und der Endstellung repräsentiert.
  5. Steuereinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Vorrückphase durch einen gegebene Beschleunigung der Motorschritte ab einer Anfangsfrequenz bis zu einer maximalen Frequenz oder dann einzuhaltenden Geschwindigkeit definiert ist, und daß die ersten Regelungsmittel (85) der Vorrückphase weiter die Erfassung einer dritten Anzahl von Motorschritten bewirken, die kleiner als die erste Anzahl ist, in Bezug auf welche sie definiert ist, um bei Erreichen der erfaßten dritten Anzahl der Schritte ein zur Beschleunigung inverses Verlangsamen der Beschleunigung herbeizuführen.
  6. Steuereinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Unterschied zwischen der dritten und der ersten Anzahl größer gewählt wird als derjenige, der erforderlich ist, um mit der Erfassung der ersten Schrittanzahl die Geschwindigkeit des Motors direkt auf ihre niedrige Anfangsfrequenz zurückzubringen.
  7. Steuereinrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Positionierungsphase (P2) auf eine konstante Geschwindigkeit festgesetzt ist, für die die Schrittfrequenz des Motors auf einer niedrigen, im wesentlichen der Anfangsfrequenz entsprechenden Frequenz eingehalten wird.
  8. Steuereinrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Geschwindigkeitssteuer- und Regelkreis (70) des Motors weiter mit dritten Mitteln (97) zur Regelung der Vorrückphase ausgestattet ist, die den ersten Regelungsmitteln (85) gleichen, und daß er weiter einen Detektor (29) zur Erfassung der Anwesenheit eines Umschlags in Wartestellung für den Transfer zum Einlaß (21) des Transportweges ausgestattet ist, wobei dieser Detektor an den Geschwindigkeitssteuer- und -regelkreis des Schrittmotors angeschlossen ist, um die ersten oder dritten Regelungsmittel (85, 97) zu steuern, je nachdem, ob ein Umschlag in Wartestellung als anwesend erfaßt wird oder nicht, und um dementsprechend die Vorrückphase für den auszuwerfenden, gefüllten Umschlag und gleichzeitig für den auf den Transfer wartenden erfaßten Umschlag oder nur für den alleinigen auszuwerfenden Umschlag durchzuführen.
  9. Steuereinrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Detektor (29), der erkennt, ob ein Umschlag am Zwischenpunkt (25A) angelangt ist, sowie der Anwesenheitsdetektor (29) für den auf den Transfer wartenden Umschlag aus demselben gemeinsamen Detektor bestehen.
  10. Steuereinrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der gemeinsame Anwesenheitsdetektor (29) für die Umschläge in einem veränderlichen Abstand zum Einlaß (21) des Transportwegs (25) montiert ist, um sich an Umschläge unterschiedlichen Formats, die als kleine Umschläge und große Umschläge bezeichnet werden, anzupassen.
  11. Steuereinrichtung nach Anspruch 10, dadurch gekennzeichnet, daß der gemeinsame Anwesenheitsdetektor (29) für die Umschläge feststeht und der Einlaß (20) des Transportwegs (25) relativ zum feststehenden gemeinsamen Detektor einstellbar ist.
  12. Steuereinrichtung nach Anspruch 11 für eine Kuvertiermaschine, mit einem Wagen (33) für den Transport und das Kuvertieren der Blätter, der in Bewegungsrichtung zwischen einer Ruhestellung, in welcher er im Abstand zur Kuvertierstation steht, und einer Kuvertierposition angetrieben wird, in welcher er mit einem Blatt in dem in der Kuvertierstation anwesenden Umschlag in Eingriff steht, mit Öffnungsmitteln, Öffnungsfinger (7) genannt, zum Öffnen des in der Kuvertierstation anwesenden Umschlag, die zwischen einer zurückgezogenen Ruhestellung vor dem Einlaß der Kuvertierstation und einer Öffnungsstellung der Lasche des Umschlags gesteuert werden, und mit einer Antriebswelle (50), auf der mechanische Steueranschlüsse für den Wagen und die Öffnungsfinger angebracht sind, dadurch gekennzeichnet, daß der Taktkreis (60, 62) aus einer Kodierscheibe (60) mit aufeinanderfolgenden Umfangspositionen der Welle, die auf der Welle montiert ist, und einem an die Scheibe angekoppelten Aufnehmer (62) besteht.
  13. Steuereinrichtung nach Anspruch 12, dadurch gekennzeichnet, daß der erste und der zweite Indikator (I1, I2) so gewählt sind, daß sie zwei voneinander entfernte Stellungen des Wagens gegenüber dem Einlaß (10) der Kuvertierstation repräsentieren, für die die Vorrückphase und die Positionierungsphase vor der Ankunft des Wagens am Einlaß der Kuvertierstation durchgeführt werden, und daß der zweite Indikator (I2) so gewählt ist, daß er die Vorrücksteuerung der Öffnungsfinger von ihrer zurückgezogenen Ruhestellung zur Öffnungsstellung der Lasche des Umschlags repräsentiert.
  14. Steuereinrichtung nach Anspruch 13, dadurch gekennzeichnet, daß der erste Indikator und der zweite Indikator (I1, I2) Parameter sind, die mit Format der Umschläge variieren.
  15. Steuereinrichtung nach Anspruch 14, dadurch gekennzeichnet, daß der Geschwindigkeitssteuer- und -regelkreis des Motors eine programmierte Schaltung ist.
  16. Steuereinrichtung nach Anspruch 15, bei der der Einlaß des Transportweges (25) aus einer im wesentlichen waagrechten Rutsche besteht, auf der die zur Kuvertierstation zu transportierenden Umschläge (110) mit auf dem Boden der Rutsche ruhenden Faltrand (111) ihrer Lasche (113) voneinander getrennt empfangen werden, und bei der die Transportmittel zum einen eine erste Rolle (20), genannt Auslaßrolle, und zum anderen eine zweite stromaufwärts befindliche Rolle (22), genannt Umschlagentnahmerolle, aufweisen, die an die Auslaßrolle gekuppelt ist, und einer gesteuerten, rückziehbaren Entnahme-Gegenrolle (23) zugeordnet ist, mit der sie in einem Abstand vom Boden der Rutsche angeordnet ist, der geringer als die Höhe der Umschläge ist, dadurch gekennzeichnet, daß der Geschwindigkeitssteuer- und -regelkreis (70) des Motors weiter zum einen mit Mitteln (91) zum Steuern der mit Druck gegen die genannte Rolle anliegenden Entnahme-Gegenrolle (23) ausgestattet ist, wobei diese Mittel im Verlauf der Positionierungsphase bei einer Erfassung der Anwesenheit eines am Einlaß (21) des Transportweges (25) auf den Transfer wartenden Umschlags ausgelöst werden, und zum anderen mit zugehörigen Verzögerungsmitteln (92) ausgestattet ist, welche die ersten Geschwindigkeitsregelmittel (85) davon abhängig steuern, ob die Verzögerungszeit abgelaufen ist oder nicht.
  17. Steuereinrichtung nach Anspruch 15 oder 16, dadurch gekennzeichnet, daß der Geschwindigkeitssteuer- und -regelkreis (70) des Motors an den Schrittmotor (27) über einen Leistungssteuerkreis (71) angeschlossen ist, der die Speisung des Motors mit Stromimpulsen bewirkt.
  18. Steuereinrichtung nach Anspruch 15 oder 17, dadurch gekennzeichnet, daß der Geschwindigkeitssteuer- und -regelkreis (70) des Motors weiter mit Initialisierungsmitteln (81, 86) ausgestattet ist, um durch Zählen der Schrittanzahl des Motors zwischen dem Transferbeginn eines Umschlags und seinem Durchlaufende am Zwischenpunkt eine Erfassung des Umschlagformats im Verlauf der Auswerf- und Zufuhrfolge zu bewirken, die zu einem Initialisierungszyklus der Maschine gehört, und um das durch das erfaßte Umschlagsformat betroffene Indikatorpaar (I1, I2) zu wählen.
  19. Steuereinrichtung nach einem beliebigen der Ansprüche 16 bis 18, dadurch gekennzeichnet, daß der Einlaß (10) der Kuvertierstation im wesentlichen oberhalb des Mittelpunkts des Achsabstands der zu den Transfermitteln gehörenden Auslaßrolle (20) und einer zu den Auswerfmitteln gehörenden Auswerfrolle (40) definiert ist.
  20. Steuereinrichtung nach Anspruch 17, dadurch gekennzeichnet, daß der Einlaß (10) der Kuvertierstation eine scharfe Kante bildet, die vom Rollenpaar (20, 40) für den Auslaß und den Auswurf nach außen vorspringt.
  21. Steuereinrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Kodierscheibe (60) im wesentlichen auf ihrem Umfang eine Reihe von nicht in einer Schleife angeordneten ersten Löchern (61A) mit regelmäßigen Zwischenabständen aufweist, und die Reihe ein Intervall ohne erste Löcher definiert, und daß sie ein zweites Loch (61B) besitzt, das radial zur Reihe der erste Löcher (61A) versetzt ist und mindestens teilweise dem von ersten Löchern freien Intervall gegenüberliegt, und daß der Aufnehmer (62) ein Doppelaufnehmer (62A, 62B) ist, der der Erfassung des Durchlaufs der ersten Löcher (61A) und des zweiten Lochs (61B) dient, um die Entwicklung der Taktsignale in einem Rhythmus zu steuern, der durch die Erfassung des Durchlaufs der ersten Öffnungen (61A) ausgehend von einem auf die Erfassung des Durchlaufs der zweiten Öffnung (61B) gestützten Bezugswert gegeben ist.
EP88119337A 1987-11-26 1988-11-21 Steuervorrichtung für Vorschub und Lage von Briefumschlägen in einer Kuvertiermaschine Expired - Lifetime EP0317932B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8716411 1987-11-26
FR8716411A FR2623752B1 (fr) 1987-11-26 1987-11-26 Dispositif de commande d'avance et de positionnement d'enveloppes dans une machine d'insertion

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EP0317932A1 EP0317932A1 (de) 1989-05-31
EP0317932B1 true EP0317932B1 (de) 1992-03-11

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EP (1) EP0317932B1 (de)
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US4903456A (en) 1990-02-27
EP0317932A1 (de) 1989-05-31
DE3869070D1 (de) 1992-04-16
FR2623752B1 (fr) 1990-03-09
FR2623752A1 (fr) 1989-06-02

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