EP1557227A1 - Vorrichtung zur Herstellung von Schraubenfedern für Matratzen mit voneinander unabhängigen Bewegungen - Google Patents

Vorrichtung zur Herstellung von Schraubenfedern für Matratzen mit voneinander unabhängigen Bewegungen Download PDF

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Publication number
EP1557227A1
EP1557227A1 EP04290182A EP04290182A EP1557227A1 EP 1557227 A1 EP1557227 A1 EP 1557227A1 EP 04290182 A EP04290182 A EP 04290182A EP 04290182 A EP04290182 A EP 04290182A EP 1557227 A1 EP1557227 A1 EP 1557227A1
Authority
EP
European Patent Office
Prior art keywords
wire
pusher
wheel
turns
motor
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.)
Withdrawn
Application number
EP04290182A
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English (en)
French (fr)
Inventor
Michel Coissard
Wilfrid Tanter
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.)
La Continentale Simmons Cie
La Compagnie Continentale Simmons SAS
Original Assignee
La Continentale Simmons Cie
La Compagnie Continentale Simmons SAS
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 La Continentale Simmons Cie, La Compagnie Continentale Simmons SAS filed Critical La Continentale Simmons Cie
Priority to EP04290182A priority Critical patent/EP1557227A1/de
Publication of EP1557227A1 publication Critical patent/EP1557227A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B21F3/02—Coiling wire into particular forms helically

Definitions

  • the invention generally relates to devices for manufacture of spiral springs for mattresses.
  • the invention relates to a first aspect a device for making springs spirals for mattresses from a wire, this device comprising means for driving the wire in translation longitudinally, a barrel pierced with a longitudinal orifice through which the thread runs, a roulette disposed in the longitudinal extension of the orifice, spacing means for varying selectively the longitudinal spacing between the orifice and roulette, a pusher placed near the roulette, moving means for moving selectively the pusher in one direction transverse substantially perpendicular to the direction longitudinal, the wire coming out of the orifice abutting on the wheel and conforming in a scroll that scrolls in front of the pusher, the radius of the turn being function the distance between the wheel and the barrel and the pitch of said turn being a function of the position transverse of the pusher.
  • WO 03/033190 A1 discloses a device of manufacture in which the means for varying selectively the longitudinal spacing between the orifice and roulette and the means to move selectively the pusher are constituted by a motor driving cams of profiles adapted to the shape of the spring.
  • Cams are specific to one type of spring. To produce a different type of spring, it is necessary to manufacture new cams, profiles different. The exact determination of the profile of the cams is long and tedious, and requires many tests.
  • the present invention aims to to overcome the defects mentioned above.
  • the device of the invention for otherwise consistent with the generic definition given in the preamble above is essentially characterized in that the spacers of the roulette wheel comprise a spacer motor, and the means of movement of the pusher comprise a driving member independent movement of the motor spacer.
  • the drive means of the wire comprise a drive member for driving independent of the organs spacing and displacement motors.
  • the device includes digital means to drive the means driving the wire, and / or the spacing means of the wheel, and / or the pusher moving means.
  • the spring comprises a plurality of turns
  • the digital means including an interface defining the characteristics of each of the turns individually, and being able to control the device for making springs with turns comply with the characteristics defined by means of the interface.
  • the characteristics defining the turns include at least the diameter of the turn and its pitch, and may also include the length of the wire constituting the turn.
  • digital means include maps of axes which control the means of training of the wire, the wheels of the wheel, and the means for moving the pusher, and a calculator managing the axes maps.
  • changes in speed drive the wire, the distance between the wheel and the barrel, and the transverse position of the pusher are determined by the digital means by interpolation.
  • the device comprises a knife adapted to sever the wire, and means for actuating the knife, these means being controlled by the means digital.
  • the knife is movable in translation along a vertical axis perpendicular to the directions longitudinal and transverse, the actuating means of the knife comprising an actuating motor member rotating, and a connecting rod converting the movement of rotation of the drive motor member in one translational movement of the knife.
  • the actuating motor member is a non-contact sliding type electric motor.
  • the means of training of the wire include rollers of higher drive and lower pinching wire between them, and a device belt drive, drive rollers being rotated by the drive member of training through the device of transmission.
  • the driving motor member is a non-contact sliding type electric motor.
  • the spacing means of the caster include an electric jack spacer actuated by the spacer motor.
  • the spacer motor is a non-contact sliding type electric motor.
  • the pusher moving means include a powered displacement actuator actuated by the displacement motor.
  • the displacement motor is a non-contact sliding type electric motor.
  • the roulette is free to rotate around of a transverse axis of rotation.
  • the invention method of making spiral springs for mattress from a wire using a device comprising means for driving the wire in translation longitudinally, a barrel pierced with a longitudinal orifice through which the thread runs, a roulette disposed in the longitudinal extension of the orifice, spacing means for varying selectively the longitudinal spacing between the orifice and roulette, a pusher placed near the roulette, moving means for moving selectively the pusher in one direction transverse substantially perpendicular to the direction longitudinal, the wire coming out of the orifice abutting on the wheel and conforming in a scroll that scrolls in front of the pusher, the radius of the turn being function the distance between the wheel and the barrel and the pitch of said turn being a function of the position cross-section of the pusher, characterized in that means of spacing the wheel include an organ spreading motor, and the means for moving the pushers include a motor moving member independent of the spacer motor.
  • the drive means of the wire include an independent drive motor member drive units for spacing and displacement.
  • the device of manufacturing includes digital means to drive the means for driving the wire, and / or the means spacing of the roulette wheel, and / or the means of moving the pusher.
  • the spring comprises a plurality of turns
  • the digital means including an interface defining the characteristics of each of the turns individually, and being able to control the device for making springs with turns comply with the characteristics defined by means of the interface.
  • the characteristics defining the turns include at least the diameter of the turn and its pitch, and can also include the length of the wire constituting the turn.
  • the steps of the two basic turns constituting opposite ends of the spring are choose zero or close to zero.
  • the diameters of the two turns of flag following the basic turns are chosen relatively larger than the diameters of the turns of based.
  • digital means include maps of axes which control the means of training of the wire, the wheels of the wheel, and the means for moving the pusher, and a calculator managing the axes maps.
  • the manufacturing device can still understand a knife able to cut the thread, and means actuating the knife, the drive being interrupted before the knife is actuated.
  • the means for actuating the knife are driven by digital means.
  • the device 20 shown in FIG. intended for the manufacture of spiral springs for mattress 10.
  • An example of such a spring is shown in Figure 1. It consists of a wire metal section, shaped into a plurality of successive circular turns 11, the centers of these turns being all aligned along a main axis X-X '.
  • Each turn is characterized by its diameter D and its step P.
  • the diameter D corresponds to the distance, considered in projection in a plane perpendicular to the main axis X-X ', separating a first point from the turn and a second point located 180 ° from the first following said turn.
  • the pitch P corresponds to the distance, considered in projection on the main axis X-X ', separating the two ends of the turn.
  • the spring 10 shown in FIG. each of its two opposite ends a first set of 12 turns of diameters D and pitch P relatively small, and in the center a second set 13 of turns of diameters D and of pitch P relatively great.
  • the device 20 for manufacturing the spring 10 comprises, as shown in FIG. 2, a frame 21, means for storing the wire 1 in the form of a coil, no represented, means 22 for straightening the wire 1, means 30 for driving the wire 1 in translation next a longitudinal direction, a barrel 40 pierced with a longitudinal hole 41 through which the thread 1 runs driven by the means 30, a wheel 50 disposed in the longitudinal extension of the orifice 41, means spacing 52 to selectively vary the longitudinal spacing between the orifice 41 and the roulette 50, a rod 90 extending from the frame in a transverse direction perpendicular to the longitudinal direction around which the turns 11 the spring are wound, a pusher 60 arranged to near the wheel 50 and having one end 61 disposed along the rod 90, means for move 62 to selectively move the pusher 60 in a substantially transverse direction along the rod 90, and a knife 80 to cut the wire 1 a the last turn of the formed spring.
  • the rod 90 is integral with the frame 21 and extends from one transverse side before it.
  • the wire 1 coming out of the orifice 41 abuts on the roulette 50, which results in it bending in a plane substantially perpendicular to the direction transverse and conforms in a turn 11 that wraps around the stem 90.
  • This spire 11 scrolls in contact on a transverse side before the pusher 60, this one transversely urging said turn 11 and him conferring a twist depending on the position transverse of the pusher.
  • the diameter D of the turn 11 thus formed is function of the spacing between the wheel 50 and the barrel 40, and the pitch P of said turn is a function of the transverse position of the pusher 60.
  • Wire 1 is stored as a coil of diameter 60 to 80 centimeters, about 1 meter high, and weighing approximately 900 kilograms.
  • the storage means typically comprise minus a moving reel in rotation about an axis vertical or horizontal, on which the coil is mounted 1.
  • the wire 1 is driven longitudinally by the means of training 20 from the reel to barrel 40, the transverse front side of the frame 21, the reel rotating as thread 1 scrolls.
  • the recovery means 22 are interposed between the drive means 30 and the storage means, and include first and second rectifiers 221 straightening the thread 1 respectively according to the direction transverse and in a vertical direction perpendicular to the longitudinal directions and cross.
  • the first rectifier 221 includes a plurality of rollers 222 mounted free in rotation relative to the frame 21 around transverse axes, on the front side of frame 21, these pebbles being distributed at short distance one of the others along a portion of trajectory longitudinal, rectilinear, of the wire 1.
  • These rollers 222 are arranged alternately above and below the wire 1, in working positions, the spacing between the wire and the axes of rotation being chosen so that the wire 1 scrolls along a longitudinal straight line substantially tangential to the rollers 222, in grooves peripherals of these.
  • rollers 222 and their axes are moreover vertically relative to frame 21, to against the solicitation of springs 223 which tend to recall the rollers 221 in their position of the rollers above wire 1 being moving up and those under wire 1 being mobile down.
  • the second rectifier 221 is identical to the first, with the exception that the rollers are mounted on vertical axes, and are movable transversely.
  • the training means 20 comprise two assemblies each consisting of a drive roller upper 32 and a lower drive wheel 33, these rollers being rotatable relative to the frame 21, on the front side of it, around axes of rotation transversals 321/331.
  • the rotational axes 321/331 of the rollers of training higher and lower 32 and 33 of the same together are mounted vertically one above the other, the upper and lower rollers 32 and 33 extending in the same vertical longitudinal plane, tangentially to each other. They are each provided with a peripheral groove, respectively 322/332, the wire 1 being engaged in the grooves 322/332 upper and lower rollers 32/33, at the point of contact between these rollers.
  • the sections of the two grooves 322/332 are identical and are determined in such a way that the 1 is pinched between the two lower and upper rollers 32/33 of the same set when they roll one against the other, so that the wire 1 is driven by the pebbles.
  • the two sets of two training rollers are arranged next to each other along the wire 1, as seen in Figure 2.
  • Wire 1 passes through three guide tubes longitudinal 91 integral with the frame 21, arranged just before the first set of drive rollers 32/33 by following the direction of thread 1, between the two sets of rollers 32/33, and between the second set of rollers 32/33 and the barrel 40.
  • This barrel 40 is a massive metal piece, substantially disk-shaped transverse axis, pierced according to its diameter by the longitudinal orifice 41.
  • This orifice has a round section of slightly diameter greater than that of wire 1.
  • the barrel 40 is rigidly fixed on the frame 21, removably.
  • the wheel 50 is rotatably mounted relative to the frame 21 about an axis of rotation 51. It has a peripheral groove 53.
  • the means 52 for spacing the roulette 50 comprise a spacer motor 521
  • the means 62 for moving the pusher comprise a displacement motor 621 independent of the spacer motor 521.
  • Spacer motor members 521 and displacement 621 are mechanically completely independent, so that it is possible to vary very freely and conveniently the pace and the diameter of the turns 11, without interference of the one on the other.
  • the means 30 for driving the wire 1 include a motor drive member 31 independent of the spacers 521 and displacement 621.
  • the device of manufacture 20 includes digital means 70 for control the means 30 for driving the wire 1, and / or the means 52 spacing the wheel 50, and / or means 62 for moving the pusher 60.
  • These digital means 70 comprise an interface 71, shown in Figure 5, to define the characteristics of each of the turns 11 individually, these digital means being able to control the device to make springs 10 including the turns 11 conform to the characteristics defined using the interface 71.
  • the characteristics defining the turns 11 comprise at least the diameter D of the turn 11 and its not P.
  • these features include also the length L of the wire 1 constituting the turn 11.
  • the interface 71 includes a seizure screen 711 on which displays a table to fill and a keyboard used to fill in the table.
  • the table comprises a line for each turn 11 of the spring 10, and three columns, where are respectively entered the diameter, pitch and length of wire of each turn.
  • the spring 10 is divided into several turns successive steps: a basic turn 14, constituting a end of the spring 10, a roof turn 15, which follows the base turn 14, normal turns 16, following the turn of flags 15, another turn of flag 15, which follows the normal turns, and finally another turn of base 14, which constitutes another end of the spring 10.
  • the base turns are slightly shorter than others and extend over an angular range slightly less than 360 °.
  • the table can be recorded in a memory of digital means 70. It is possible to memorize the characteristics of several types of springs, corresponding to several manufacturing campaigns to perform. Table corresponding to the spring to be made is just recalled before the start of the manufacturing campaign, so than the time needed to reconfigure the device manufacturing is extremely short. The rate occupation of the machines can be very high.
  • the means in addition to the interface 71 include 72 axis maps that drive the means 30 of driving the wire 1, the means 52 of spacing the roulette, and the means 62 for moving the pusher 60, and a computer 73 managing the axis cards 72.
  • the axis cards 72 are in the example of embodiment illustrated in Figures 2 to 5 of the mark Schneider and type CAY 33.
  • the computer 73 is chosen for its speed of calculation. It is also brand Schneider, and presents a polling time of less than 4 milliseconds.
  • the digital means 70 are programmed so as to optimize the cycle time.
  • the program gives the initiative to the axes maps 72 in relation to the calculator 73, the axis cards 72 coming to take their instructions to the calculator 73 as soon as a place is available in the buffer of the axis card 72.
  • the driving motor member 31 is an engine non-contact sliding type, rigidly fixed on the frame 21, and rotating a motor shaft 311 transversal.
  • the training means 30 comprise furthermore, a belt transmission device 34 of the rotational movement of the motor shaft 311 to the rollers 32 upper and lower 31, shown in Figure 4.
  • rollers of training 32/33 are for this purpose integral in rotation of the drive axes 321/331, these axes extending transversely through the frame 21 and protruding by respective free ends a rear side of the frame 21.
  • the device for transmission 34 comprises a belt 341 notched on its two faces, a transverse return axis 342 mounted movably in rotation on the frame 21, and a set of wheels or notched rollers 343, integral in rotation of the shaft motor 311, the return axis 342 and the ends free of 321/331 drive shafts, these wheels notches 343 meshing with the toothed belt 341.
  • rollers of higher and lower drives each have a diameter of about 150 millimeters.
  • Their respective grooves 322/332 each have a rectangular triangle section, basic about 2 millimeters, and height about 1 millimeter. These grooves are suitable for threads 1 of a diameter between 1.2 and 3 millimeters, and preferably between 1.5 and 2.1 millimeters.
  • the upper drive rollers 32 are linked to the frame 21 by a slide connection allowing a slight vertical translation of these pebbles relatively at frame 21, upwards with respect to a position of rest in which the upper training rollers 32 are in contact with the lower drive rollers 33.
  • the training means 30 include two support trolleys 35, the axes 321 being mounted fixed in translation vertical and free in rotation each on a trolley by through ball bearings.
  • Each carriage 35 is connected to the frame 21 by two cages rollers, the rollers being interposed between two vertical guide rails secured to the carriage 35, and two vertical complementary rails integral with the frame 21.
  • the training means 30 further include return means 36 urging each carriage 35 towards its rest position when it moves upwards.
  • these means of recall 36 include for each carriage 35 a stop solid 361 secured to the frame 21 and disposed above the carriage 35, the abutment 361 and the carriage 35 being mutually spaced vertically.
  • This stop 361 has a hole extending vertically.
  • Ways 36 still include a rod 362 secured to the carriage 35 and extending vertically therefrom, engaged freely in translation in the orifice of the stopper, and elastic washers 363 stacked around the rod 362, over the entire space between the abutment 361 of the trolley 35.
  • the elastic washers 363 are compressed when the carriage 35 moves upwards, and they Solicit this one down.
  • the drive means 30 typically allow a maximum vertical translation of the trolleys of 1 millimeter.
  • the means 52 for spacing the wheel 50 include a 522 gauge electric actuator at linear guide, powered by the motor spacer 521.
  • the spacer motor 521 is an engine electrical type sliding contactless.
  • Spacer cylinder 522 moves longitudinally, in two opposite possible directions, a longitudinal carrier rod 523, of section rectangular, the wheel 50 being freely mounted in rotation about its axis of rotation 51 on a end of this carrier rod opposite the cylinder.
  • the spacer means 50 finally comprise a guide block 524 integral with the frame 21, pierced with a rectangular section guide hole to the section of the carrier rod 523, in which this carrier rod is engaged and slides freely.
  • the axis of rotation 51 of the wheel 50 extends in the transverse direction and is located, according to the vertical direction, slightly above the orifice longitudinal 41 of the barrel 40.
  • the groove 53 of the roulette is located in the same vertical longitudinal plane that the longitudinal hole 41 of the barrel 40, so that the wire 1 coming out of this orifice comes into contact with the groove 53, slightly below the axis of rotation 51 of the wheel 50, and causes it to rotate in a clockwise direction when we consider the roulette 50 face as in the figure 3.
  • the rod 90 stretches slightly below one end of the longitudinal orifice 41 facing the caster 50, and present, perpendicular to the direction cross section, a round section.
  • the stem in this position extends substantially along the axis of symmetry the spring formed by the manufacturing device.
  • the pusher 60 has an elongated shape, rectangular section. It extends in a vertical plane longitudinal, oblique, and has a flat face turned one side transverse front. Its free end 61 surrounds the rod 90 about a quarter of its circumference, a lower side of this rod 90. A end opposite the free end 61 is located relatively lower and, depending on the direction longitudinal, relatively more on the side of the roulette 50 that the free end 61. This opposite end is welded to a support plate 63.
  • the displacement means 62 of the pusher 60 include an electric displacement cylinder 621 to linear guide actuated by the driving member of displacement 622.
  • This displacement motor member 622 is an engine electrical type non-sliding contact, the cylinder and the motor member being rigidly fixed on one side transverse rear of the frame 21.
  • Displacement cylinder 621 moves transversally, in two opposite possible directions, a transverse support rod 623, of section rectangular, the support plate 63 being rigidly fixed on one end of this carrier rod opposite to the cylinder.
  • the transverse carrier rod 623 extends across an orifice formed in the frame 21 in which this rod carrier is engaged and slides freely.
  • the pusher 60 is movable transversely between extreme and advanced positions. In his retracted position, the pusher 60 extends in the same vertical longitudinal plane that the longitudinal hole 41 of the barrel 40 and that the groove 53 of the wheel 50. In its advanced position, the pusher 60 is located relatively more forward than in its remote position.
  • the manufacturing device in addition to the knife 80, comprises means 81 for actuating the knife 80, driven by digital means 70.
  • the knife 80 is mobile relative to the frame 21 in translation next the vertical axis.
  • the means 81 for actuating the knife 80 comprise a rotary actuator 811, a crankshaft, not shown, rotated by the driving member 811 and a connecting rod 812 converting the rotational movement of the crankshaft in a movement of translation of the knife 80.
  • the driving actuator 811 is an engine slip-type non-contact type, rigidly fixed on the frame 21.
  • the knife 80 is movable between a position of rest, relatively higher, and a cutting position, relatively lower.
  • a crankshaft corresponds to a round trip of the knife 80 from its position resting at its cutting position.
  • the knife 80 is arranged so that the gun 40 plays the role of counter-blade, the knife 80 in its movement towards its cutting position passing flush from the end of the longitudinal orifice 41 turned towards roulette 50.
  • the rod 90 is arranged in the vertical extension of the movement of the knife 80.
  • the manufacturing device that has been described above has many advantages.
  • the different movements of the machine are mechanically independent and controlled by the means digital.
  • the device makes it possible to obtain particularly simple springs whose spikes have returned from an inner side of the turns, and not projections outward of the turns.
  • the spikes are constituted by the free ends of the wire constituting the spring.
  • the manufacturing device enables to simply get basic turns 14 perpendicular to the axis of symmetry of the spring 10. It is enough for that to choose the steps of these two turns of base 14 equal to zero by filling in the table on the screen input. It happens that the basic turns present naturally, in the absence of action of the pusher, a step slightly negative. We then program a weak step, close to zero, to correct this natural not slightly negative and get flat base turns.
  • the device allows to freely program the pitch and the diameter of each turn of the spring to produce. It is thus possible to produce a very wide range of spring shapes, including including springs comprising turns of pitch and diameters with a very wide dispersion.
  • the device allows for example to produce a spring consisting of large spiers, with a small spire interposed between each pair of large turns contiguous, which was not possible with the machines of the prior art.
  • the manufacturing device is able to produce springs having a succession of brutal discontinuities in pitch and diameter of turns.
  • the fact that the wheels of the roulette wheel are mechanically totally independent of others movements of the machine makes it possible to produce springs including coils with a much larger diameter than earlier machines allowed.
  • the diameter of the turns thus varies from 20 to 250 millimeters, and is preferably in the range 30 to 200 millimeters.
  • the manufacturing device can also handle wire of larger diameter than the machines of the prior art. These wires have a diameter between 1.2 and 3 millimeters, and preferably a diameter of between 1.5 and 2.1 millimeters.
  • the manufacturing device can reach a rate of 100 springs per minute at maximum, and typically 70 springs per minute.
  • Electric motors were chosen of the type without sliding contact because these motors are particularly fast. They allow to obtain a constant torque at zero speed, and therefore to maintain position the roulette and the pusher.
  • the cylinders were chosen to guide linear because such cylinders allow positioning very precise roulette and pusher.
  • the selected technologies for engines and cylinders contribute, with the programming of digital means, to obtaining a high-end manufacturing machine cadence and high precision.
EP04290182A 2004-01-23 2004-01-23 Vorrichtung zur Herstellung von Schraubenfedern für Matratzen mit voneinander unabhängigen Bewegungen Withdrawn EP1557227A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04290182A EP1557227A1 (de) 2004-01-23 2004-01-23 Vorrichtung zur Herstellung von Schraubenfedern für Matratzen mit voneinander unabhängigen Bewegungen

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EP04290182A EP1557227A1 (de) 2004-01-23 2004-01-23 Vorrichtung zur Herstellung von Schraubenfedern für Matratzen mit voneinander unabhängigen Bewegungen

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EP1557227A1 true EP1557227A1 (de) 2005-07-27

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038240A1 (en) * 1995-05-31 1996-12-05 Afcol Manufacturing Limited Methods and means for forming spring coils
WO2003033190A1 (en) * 2000-11-28 2003-04-24 Sealy Technology Llc Coil and coil-head formation dies for coils with non-conventional terminal convolutions
WO2003035302A1 (en) * 2001-10-23 2003-05-01 L & P Property Management Company Multiple wire feed for spring coiling machine and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038240A1 (en) * 1995-05-31 1996-12-05 Afcol Manufacturing Limited Methods and means for forming spring coils
WO2003033190A1 (en) * 2000-11-28 2003-04-24 Sealy Technology Llc Coil and coil-head formation dies for coils with non-conventional terminal convolutions
WO2003035302A1 (en) * 2001-10-23 2003-05-01 L & P Property Management Company Multiple wire feed for spring coiling machine and method

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