EP0230211B1 - Selektionsmechanismus für Nadeln und Stecher auf Stickmaschinen - Google Patents

Selektionsmechanismus für Nadeln und Stecher auf Stickmaschinen Download PDF

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Publication number
EP0230211B1
EP0230211B1 EP86830154A EP86830154A EP0230211B1 EP 0230211 B1 EP0230211 B1 EP 0230211B1 EP 86830154 A EP86830154 A EP 86830154A EP 86830154 A EP86830154 A EP 86830154A EP 0230211 B1 EP0230211 B1 EP 0230211B1
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EP
European Patent Office
Prior art keywords
rods
carrier
piercer
needle
rod
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Expired - Lifetime
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EP86830154A
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English (en)
French (fr)
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EP0230211A2 (de
EP0230211A3 (en
Inventor
Emilio Comerio
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Comerio Ercole SpA
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Comerio Ercole SpA
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Priority to AT86830154T priority Critical patent/ATE56055T1/de
Publication of EP0230211A2 publication Critical patent/EP0230211A2/de
Publication of EP0230211A3 publication Critical patent/EP0230211A3/en
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Publication of EP0230211B1 publication Critical patent/EP0230211B1/de
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/16—Arrangements for repeating thread patterns or for changing threads

Definitions

  • This invention is concerned with a device adapted to provide for enabling and disabling needle-carrier and piercer-carrier rods, in particular in a shuttle embroidery machine, according to a presettable program. It is widely known in embroidery machines the problem of enabling and disabling the needle-carrier rods and piercer-carrier rods, that is to say set them to work or stop them according to extensively variable programs, essentially related to the type of pattern one desires to obtain on the fabric.
  • the problem mentioned above is further increased by the fact that the needle-carrier rod actuation cuts off the piercer-carrier rod actuation, and vice versa, since as it is known, when the needles (or piercers) are active, the piercers (or needles) must be disabled.
  • the above mentioned requirement has involved particularly complicated design arrangements in order to provide for actuation of the needle-carrier rods only, or piercer-carrier rods only, according to a particular program that can also be variable, in accordance with the desired pattern.
  • the two embodiments mentioned above differ from each other in that, according to the first one, the coupling between the needle-carrier rods and the drive-bar thereof is obtained under the control of a first programming device comprising a splined shaft, and the coupling between the piercer-carrier rods and the drive bar thereof is obtained under the control of a second programming device comprising a splined shaft in this case as well.
  • the programming device comprising a splined shaft in this case as well is a single one and it operates directly on the coupling means between the needle-carrier rods and the drive bar thereof, while it operates indirectly, through intermediate driving means, on the coupling means connecting the piercer-carrier rods to the drive bar thereof.
  • Another embroidery machine that uses two separate drive bars for the reciprocating motion required to operate a plurality of needles and a plurality of piercers, has been disclosed and claimed in the French Patent Application No. 82 01159, filed on January 26, 1982, assigned to Adolph Saurer AG, and issued under No. 2 499 108.
  • the machine mentioned above has a first reciprocating drive bar extending to the rear and laterally of the needle-carrier rods, and being adapted to connect to the latter through oscillating means located at the rear ends of the needle-carrier rods.
  • the subject machine includes a second drive bar for the reciprocating motion, located underneath the first drive bar and parallel thereto, and adapted to be coupled to the piercer-carrier rods in a fashion similar to that provided for the coupling between the needle-carrier rods and the first drive bar.
  • a complicated mechanism for operating said oscillating means which are located at the rear ends of the needle-carrier rods and piercer-carrier rods, to connect said rods to the drive bars thereof.
  • the shuttle embroidery machine disclosed in the subject German Patent is extremely complex, in particular as far as the shape of the needle-carrier rods and piercer-carrier rods is concerned.
  • said rods which are straight and a single piece for a sufficient length to allow them to slide in appropriate guide means, bear a hinge at the rear ends thereof, where oscillating arms are pivoted, the pivoting motion thereof being controlled through a cam follower roller programming means, said arms being adapted to provide for the connection to a single drive bar.
  • connection is obtained by means of notches or projections provided on said arms, which under control of said programming cam follower roller engage the oscillating drive bar.
  • the subject machine has the same drawback of the shuttle embroidery machine mentioned above and disclosed in the German Utility Model No. 80 21 864 to Maschinenfabrik Karl Zangs AG. in that, in order to change the sewing program, it is compulsory to change the programming cam follower roller and consequently the machine has to be shut down.
  • the connections between the oscillating arms and the oscillating drive bar seem to be scarcely reliable, since they are entrusted completely to the coupling between a projection provided on the oscillating arm, and the oscillating drive bar, even though in some embodimental variations of the subject machine, resilient means are provided to enhance said coupling.
  • a further drawback of the same machine resides in the fact that, in order to be able to prearrange the needle-carrier rods aligned on a plane, and the piercer-carrier rods aligned on an underlaying plane, the oscillating arms associated with the piercer-carrier rods are elbow-shaped, which makes even more critical the actuating conditions of these rods.
  • the transmission of motion from the oscillating drive bar to the piercer-carrier rod does not take place along a straight line, but rather along an S-shaped body whereby an accordingly high stress condition prevails in the intermediate span thereof.
  • the subject device uses, for the coupling of the needle-carrier rods and of the piercer-carrier rods to the single drive bar thereof, the already tested connection system that was used for the embroidery machine disclosed in Italian Patent No. 1.182.146 filed on July 28, 1976, in the name of the same Applicant, and issued June 5, 1983.
  • a connection of the type specified is embodied as a laterally sliding pin which is insertable in the needle-carrier rod, or piercer-carrier rod, whose lower end, when in its lowered position, engages the oscillating motion driving bar and, by cooperation with a pin integral with the needle-carrier rod which engages the oscillating motion driving bar on the opposite side, integrally connects the latter to the needle-carrier rod, or to the piercer-carrier rod.
  • the disengagement of the needle-carrier rod, or piercer-carrier rod, from the drive bar is carried out by raising the pin mentioned above, and this operation is performed by means of a small lever rotatable on said needle-carrier rod, or piercer-carrier rod, and having one end connected to, and more particularly pivoted on, the upper end of the connecting pin mentioned above.
  • Actuation of the above mentioned small levers is carried out by means of a control lever for each of said levers mounted on the needle-carrier rod or piercer-carrier rod whose raising or lowering results in a respective lowering or raising of the connection pin, followed by engagement and disengagement of the needle-carrier rod or piercer carrier rod relative to the drive bar.
  • the machine in accordance with this invention includes a plurality of needles, carried in a known manner by means of a clamping block 2, by needle-carrier rods 3, slidable in a guide 4 ( Figure 1) formed in cross member 5 of the machine frame.
  • Rods 3 are located in a horizontal plane, spaced at predetermined intervals, and slide in the same plane, along direction A-A of Figure 5, perpendicular to fabric T, shown by a chain line. Actuation of the needle-carrier rods 3, i.e.
  • each needle rod 3 is provided with a block 7 fastened in a general fashion to said end of the needle-carrier rod 3. Underneath block 7 there is provided a projection 8 for engagement with the rear face of drive bar 6.
  • a substantially L-shaped control arm 9 having slightly divergent sides making an angle higher than 90°, a side 9a thereof extending substantially upward, while the second side 9b slopes downwardly with the front end thereof inserted in a connecting pin 10 slidingly engaged in a transverse opening located in a substantially rear portion of needle-carrier rod 3.
  • Connecting pin 10 protrudes down from needle-carrier rod 3, and the end portion thereof projecting out from said rod is meant to come into engagement with drive bar 6, and in particular with an upper projection 6a thereof.
  • Needle-carrier rod 3 can be brought to a disabled condition where it is disengaged from drive bar 6. That is made possible by raising connecting pin 10 up to the position shown in Figure 6, where the pin is completely disengaged relative to drive bar 6. Raising of connecting pin 10 is provided through counterclockwise rotation of control arm 9. To that end, drive arm 9 is pivoted on a pivot shaft 11 carried by a fork member 12 located on the upper part of block 7. Said counterclockwise rotation is carried out against the bias of a spiral spring (not shown) coaxial to pivot shaft 11 and acting in such a way as to bias control arm 9 to the position shown in Figure 5, where it arranges connection pin 10 in engagement with drive rod 6. Therefore, the counterclockwise rotation necessary to disengage connection pin 10 from drive bar 6 is carried out against the bias of the resilient means mentioned above.
  • the embroidery machine provided with the device according to the invention has a plurality of piercers 13 known per se. Contrary to the known machine practice, they are not fastened directly to the corresponding piercer-carrier rod 14 which is in turn connected to drive bar 6, but they are mounted on a square bracket 15 connected to said piercer-carrier rod 14 which consequently subjects said piercers 13 to the required reciprocating motion.
  • Said square brackets 15 are shown in detail in Figure 1, but they can be seen sideways in Figures 2 and 3 and, as it is shown in said Figures, said square connecting brackets 15 comprise a substantially L-shaped body allowing the piercer 13 to be located exactly underneath sewing needles 1, as it is apparent from Figure 1, while piercer-carrier rod 14 is displaced sideways relative to needle-carrier bar 3, and in the same plane thereof, as it can still be seen from Figure 1.
  • This arrangement is particularly convenient since, without any particular design complications, needles 1 and piercers 13 operate along parallel and superimposed directions, therefore very close as required in any embroidery machine.
  • Front end 16 of piercer-carrier rod 14 is inserted in an opening provided in the upper portion of vertical side of square connecting bracket 15, being fastened thereto by means of a set screw 17.
  • rod 14 reciprocates according to the direction of double pointed arrow G of Figure 2, it draws therewith square connecting bracket 15 that reciprocates accordingly between the full line position and the dashed line position.
  • square connecting bracket 15 has fastened to it the end 18 of a rod 19, which is slideably engaged within a bore 20 provided through cross member 5, exactly underneath bore 21, provided through cross member 5 as well, wherein piercer-carrier rod 14 is slideably engaged. More particularly, front end 18 of rod 19 is fastened at the corner of square connecting bracket 15, in any way well known, similar to end 16 of piercer-carrier rod 14, i.e. for instance by means of a set screw (not shown).
  • rod 19 reciprocates in the same vertical plane wherein the path of motion of underlaying piercer-carrier rod 14 is located.
  • Piercer 13 is fastened in any way known per se to the free end of the horizontal side of square connecting bracket 15, projecting from the front thereof, as it is apparent in particularfrom Figures 1 to 3.
  • rod 19 The main purpose of rod 19 is not to transmit a driving motion to piercer 13, since that is performed by square connecting bracket 15 adapted to transmit directly to piercer 13 the reciprocating motion of rod 14.
  • Rod 19 is provided in order to inhibit rotation of square connecting bracket 15 in a plane substantially perpendicular to the plane where the reciprocating path of rod 19 is contained. Therefore, rod 19 main function, is a stabilizing function for piercer 13 motion, so that the same is always straight and always takes place along the same path which is therefore positively located underneath the path of sewing needle 1.
  • connecting pin 10 Disengagement of piercer-carrier rod 14 from drive bar 6, and therefore the stopping thereof, is obtained by raising connecting pin 10, as it is shown in Figure 3, so that it disengages from drive bar 6 reciprocating according to the direction of double pointed arrow H of Figure 3 without carrying piercer-carrier rod 14 therewith.
  • Raising of connecting pin 10 is provided by moving control arm 9 with a counterclokwise rotation against the bias of said resilient means (not shown in this case either) provided on the pivot shaft 11 thereof, and said operation is carried out as it will be explained more particularly in the following.
  • the number of longitudinal slots 22 is equal to the sum of the number of needle-carrier rods 3 and piercer-carrier rods 14, since each of said rods is provided with a control arm 9, and therefore with a branch 9a - which has to be slidable in a slot 22 thereof.
  • each needle-carrier rod 3 and each piercer-carrier rod 14 has associated therewith, above heavy plate 23, a control lever 25 extending above slot 22 and therefore above control arm 9, and engaged in particular with branch 9a thereof. Therefore, the number of control levers 25 will be equal to the total of the number of needle-carrier rods 3 and the number of piercer-carrier rods 14.
  • Each control lever 25 is comprised, in the embodiment shown herein, of a substantially straight metal section which is provided, close to an intermediate area thereof, with a bent portion 26 through which it engages the upper end of branch 9a of control arm 9.
  • Levers 25 are pivoted, at the front end thereof, i.e. on the needle 1 and piercer 13 side, on a common shaft 27, mounted on support lugs 28 that are fastened, at the lower end thereof, in a transverse groove 29 provided on top of the stationary cross member 5. More particularly, support lugs 28 are inserted all the way, with a substantially close fit through heavy plate 23, so that they are fastened, at the lower end thereof, in groove 29 of stationary cross member 5.
  • Figure 1 there is partially shown support lugs 28, and more particularly the ones among them which are associated with the control levers 25 shown therein. As it is apparent, both the remaining levers 25 and lugs 28 are identical to the ones shown.
  • levers 25 which are associated with piercer-carrier rods 14 and, therefore, the way they cause the disengagement of piercer-carrier rods 14 from drive bar 6 is shown.
  • levers 25 can take the position shown in said Figure, and this should be considered the "raised” position, where branch 9a of control arm 9 is not biased to turn counterclockwise, whereby it keeps connecting pin 10 in a lowered position where the lower end thereof engages drive bar 6 thereby providing for the coupling between piercer-carrier rod 14 and drive bar 6.
  • Control levers 25 can take a second position as well, i.e.
  • Said means include, for each control lever 25, a vertically extending slender rod 30 connected at the top thereof to the rear end portion of control lever 25.
  • slender rod 30 projects above rear cross member 24 through a bore 31 thereof, wherein it is slidably accepted.
  • resilient means comprising a coil spring 35 arranged around slender rod 30.
  • Spring 35 purpose is to allow for a temporary rotation of control lever 25 around pivot pin 27, as it is shown in Figure 3, then driving it to turn in the opposite direction to the position shown in Figure 2 at the end of the action of the means controlling the motion of slender rod 30, which are provided at the lower end thereof, as it will be described.
  • spring 35 keeps control lever 25 slightly raised relative to branch 9a of control arm 9, to avoid that, when needle-carrier rod 3 and piercer-carrier rod 14 are enabled, said branch 9a of control arm 9 rubs against the lower surface of control lever 25.
  • tailpiece 36 comprising a substantially rectangular body whose length is large compared to the width thereof, the width being slightly larger than slender rod 30 diameter.
  • an upper projection 37 and a lower projection 38 are provided on a face of tailpiece 36, more particularly on the face located on the side of fabric T.
  • a step 39 whose purpose will become apparent in the following.
  • guide means of tailpieces 36 associated with needle-carrier rods 3 (and of tailpieces associated with piercer-carrier rods 14 which will be mentioned in the following), said guide means comprising a substantially L-shaped section 40 whose horizontal side 41 is substantially comb-shaped, being provided for said purpose with a plurality of substantially rectangular projections 42 which define slots 43 of tailpieces 36.
  • section 40 is supported in any known way by a support angle section 44 substantially L-shaped as well, which supports vertical side of section 40 fastened to vertical side 45 thereof.
  • the device according to this invention also includes means to keep temporarily locked the slender rods 30 in the lowered position thereof, said means allowing, in the disabled condition thereof, a raising of any number of slender rods 30 according to a predetermined sewing program. Said means are described hereinafter.
  • the means keeping the slender rods 30 temporarily locked in the lowered position thereof, being also adapted to allow for a plurality of slender rods to raise thereafter according to the sewing program include a plurality of substantially L-shaped metal plates 48 which, at the corner 49 thereof are freely pivoted on a common shaft 50 extending for the whole length of the embroidery machine.
  • the number of metal plates 48 is equal to the number of slender rods 30 associated to the piercer-carrier rods 14, or to the (equal) number of the remaining slender rods associated to the needle-carrier rods 3, and discussed in the following. In fact, as it will become apparent in the following, this is due to the fact that each metal plate 48 engages simultaneously with a projection 62 of a tailpiece 60, and with the projection 37 of tailpiece 36 adjacent thereto.
  • vertical side 51 of metal plates 48 is substantially bent with the concave side thereof facing the slender rods 30 and the lower edge thereof comes into engagement, at least with a portion thereof, with step 39 of tailpiece 36 integral with slender rod 30 when the latter has been brought in the lowered position thereof through the action of drive shaft 46 shown in detail in Figure 3.
  • shaft 46 is rotated in the direction of arrow S, so that the arm 47 thereof, coming into engagement with projections 38 of tailpieces 36, causes the slender rods 30 to lower.
  • slender rods 30 can be raised again, according to the predefined program, by disengagement of metal plates 48, i.e. moving vertical side 51 in an opposite direction as it is diagrammatically shown in Figure 4, so that the lower edge of said metal plates comes out of engagement with step 39 of tailpiece 36, to enable the number of slender rods 30 involved to move up again to the "raised” position under the bias of spring 35 as it is more particularly shown in Figure 2. All the piercer-carrier rods 14 associated to said slender rods at this point will be enabled again.
  • the means controlling the rotations of metal plates 48 for engagement and disengagement relative to tailpieces 36 preferably comprise electromagnet means 53 whose core is carried by a bracket 54 in turn fastened in any known way underneath a heavy stationary plate 55 which is part of the embroidery machine frame, whereon there is also supported shaft 50 where the metal plates 48 are pivoted.
  • Rod 56 comprising the moving element of electromagnet means 53, has a fork-shaped free end 57 only one prong of which is shown in Figures 2 and 3, said end 57 being shown in cross-section.
  • metal plates 48 are disengaged from tailpieces 36 associated therewith, in that side 51 is rotated counterclockwise due to its engage;-- ment with pin 58 of rods 56.
  • Figure 5 shows one of the needle-carrier rods 3 in the operating condition, i.e. wherein needle 1 is in the sewing phase, and therefore needle-carrier rod 3 is coupled to drive bar 6.
  • needle-carrier rod 3 is connected to drive bar 6 in that connecting pin 10 is in the lowered position thereof since control lever 25 associated therewith is in its "raised” condition.
  • Spring 35 is in the extended condition thereof, in which it keeps control lever 25 raised slightly above branch 9a of control arm 9 and correspondingly raises slender rod 30 which is pivoted above said control lever.
  • Connection between slender rod 30 and control lever 25 is identical to that of the corresponding levers associated with piercer-carrier rods 14.
  • Slender rod 30 is provided, in the lower portion thereof, with a tailpiece 60 of a substantially rectangular shape having a considerable length compared to the, diameter of rod 30, while its width is slightly larger that the latter.
  • Tailpiece 60 in the upper part thereof, is provided, on opposite faces, with two projections 61 and 62, rear projections 61 facing the rear portion of the embroidery machine, while projection 62 faces the same side of projections 37 and 38 of tailpieces 36.
  • the length of projections 61 and 62 is substantially the same as the length of projections 37 and 38 of tailpieces 36.
  • a second drive shaft 63 supported in any known way by the machine frame, and which is provided with a radially projecting arm 64, similar to arm 47 associated to drive shaft 46, adapted to come into engagement at the end thereof with rear projections 61 of tailpieces 60.
  • arm 64 associated with second drive shaft 63 similarly to arm 47 associated with first drive shaft 46, is a continuous flat body, comparable to a slab, and as it is apparent in particular from Figure 1, it extends the whole length of the drive shaft, either 63, or 46 if reference is made to arm 47.
  • first shaft 46 comes into engagement only with projections 38 of tailpieces 36 connected to slender rods 30 associated with piercer-carrier rods 14, while arm 64 of second drive shaft comes into engagement only with projections 61 pertaining to tailpieces 60 of slender rods 30 associated with needle-carrier rods 3, is due to the particular shape of tailpieces 36 and 60, to the mutual location of tailpieces projections, and, in addition, to the fact that first and second drive shafts 46 and 63 are mutually offset heightwise as it is apparent in particular from Figure 2.
  • projections 38 of tailpieces 36 are located in the lower front part of said tailpieces, while tailpieces 60 are not provided with lower projections. Therefore, no interference is possible between arm 47 of first drive shaft 46 and tailpieces 60. Projections 61 of the latter, that are engaged by arm 64 of second drive shaft 63, are located upwards and rearwards. On their rear side tailpieces 36 do not have any projection. Therefore, in this case as well interference is precluded between arm 64 of second drive shaft 63 and the tailpieces 36. On the contrary, projections 37 on tailpieces 36, and projections 62 of tailpieces 60 being provided in order to keep the various slender rods 30 in the lowered position thereof in cooperation with plates 48 are located on the same side, and substantially at the same height.
  • electromagnet means 53 and plates 48 are all located on the same side of slender rods 30, i.e. on the side where needle-carrier rods 3 and piercer-carrier rods 14 come out.
  • the relevant front projections 62 cooperate with plates 48 actuated by electromagnet means 53, as it can be seen in more detail from plan view of Figure 7 which shows exactly the mutual location of vertical side 51 of a plate 48 relative to two adjacent tailpieces 36 and 60, and more particularly relative to respective front projections 37 and 62.
  • vertical side 51 engages with projections of tailpiece 36 of slender rod 30 associated with a piercer-carrier rod 14, while at the other end portion (the left side portion in Figure 7) it comes into engagement with projection 62 of tailpiece 60 pertaining to slender rod 30 associated with a needle-carrier rod 3.
  • the device according to this invention when enabling or actuating a predetermined group of needle-carrier rods 3, operates in the same way as when enabling piercer rods 14. For reasons of clarity only, the essentials of this operation are recalled hereinafter.
  • a first alternative is that provision is made so that all the needle-carrier rods 3 remain disabled, therefore drive shaft 63 remains in the rotated position as it was described above, and so that first drive shaft 46 is actuated in order to allow slender rods 30 associated with piercer-carrier rods 14 to raise, when corresponding plates 48 are disengaged by electromagnet means 53.
  • first drive shaft 46 is actuated in order to allow slender rods 30 associated with piercer-carrier rods 14 to raise, when corresponding plates 48 are disengaged by electromagnet means 53.
  • those slender rods 30 will raise that are associated with piercer-carrier rods 14, while those associated with needle-carrier rods 3 will remain in the lowered position thereof, because of the bias of second drive shaft 63.
  • a second alternative, corresponding to the one mentioned above for piercer-carrier rods 14, corresponds to providing for a plurality of needle-carrier bars 3 to be returned to the operating condition.
  • second drive shaft 63 is rotated in a direction opposite to the former one to cause it to disengage from projections 61 of tailpieces 60 pertaining to slender rods 30 associated with needle-carrier rods 3, said tailpieces 60 then remaining in their lowered position for engagement with corresponding plates 48.
  • tailpieces 60 and 36 When a plurality of plates 48 disengage from tailpieces 60 and 36, the latter will be allowed to raise both because of the position taken by the second drive shaft 63 and because of the action of springs 35, while on the other hand all the tailpieces 36 associated with piercer-carrier rods 14will remain in the lowered position thereof for the above mentioned reason.
  • the device according to this invention offers two alternatives and in particular a first alternative corresponding to energizing a certain number of electromagnets 53 to disengage plates 48 while a drive shaft, for instance first shaft 46, is in the rotated position thereof, so that piercers 13 are not actuated.
  • a second alternative corresponds as well to energizing a certain number of electromagnet 53 while on the contrary the second drive shaft is kept in the rotated position, so that all the needle-carrier rods 3 are disabled.
  • the first drive shaft is rotated in a direction opposite to the preceding one, which had provided for lowering the tailpieces 36 associated with piercer-carrier rods 14.
  • Both the above alternatives, and in particular the actuations of electromagnet means 53 can be programmed on purpose by electronic means, so that the functions and overall operation of the embroidery- machine are completely automated.
  • the device according to this invention leaves the possibility for manual manipulation in order to insert, when it is desired, one or more needle-carrier rods 3, or one or more piercer-carrier rods 14.
  • Said possibility is granted in that an additional plurality of thin drive rods 65 are located in the upper part of the machine and extend vertically between two of the adjacent slender rods and in a position slightly backwards therefrom, and more precisely between a slender rod 30 associated with a needle-carrier rod 3 and a slender rod 30 associated with a piercer-carrier rod 14.
  • Said additional thin rods 65 are located above horizontal side 52 of plates 48, and the operation will be explained referring now to Figure 4, respectively for a piercer-carrier rod 14 and for a needle-carrier rod 3, even though operation for the first kind of rods is perfectly symmetrical compared to the operation for the second kind of rods.
  • Figure 4 refers to preceding Figure 3, i.e. it shows the portion of the device concerning a piercer-carrier rod 14.
  • Figure 4 shows the portion of the device concerning a piercer-carrier rod 14.
  • first drive shaft 46 is in the upwards rotated position and, in fact, arm 47 thereof is substantially horizontal and raised relative to projection 38 of tailpiece 36. The latter is kept in the lower position thereof with a corresponding disengagement of piercer-carrier rod 14 from plate 48 whose side 51 engages with upper projection 37. Simultaneously, side 58 of plate 48 engages with projection 62 pertaining to tailpiece 60 associated with a needle-carrier rod 3, but, as it has been mentioned above, it should be noticed that second drive shaft 63, as shown in Figure 6, is now in the downwards rotated position thereof and its arm 64 engages against projection 61 of tailpiece 60.
  • second drive shaft 63 will be kept in the position shown in full line in Figure 6, so that actuation of plate 48 as mentioned above will cause tailpiece 60 to remain in the lowered position and the associated needle-carrier rod 3 will be kept disabled.
  • piercer-carrier rod 14 If it is desired that piercer-carrier rod 14 is brought to operating in such enabled condition, during the normal operation of the embroidery machine as well, it is only required to exert pressure on upper L-bent end 66 of thin rod 65 for related lowering thereof, so that its lower end, coming into engagement against horizontal side 52 of plate 48, drives the latter to rotate counterclockwise therefore disengaging its vertical side 51 from projection 37 pertaining to tailpiece 36.
  • slender rod 30 under the action of spring 35 will return to the "raised” position thereof and as a consequence a clockwise rotation of lever 25 enables a corresponding clockwise rotation of control arm 9 which causes connecting pin 10 to lower into engagement with drive bar 6.
  • Lowering of thin rod 65 and the related rotation of plate 48 are shown by dashed lines in Figure 4.
  • thin rod 65 automatically returns to the starting position being biased by a return spring 67, which operates between a cross member 68 located underneath stationary cross member 24 and provided with a bore 69 for through passage of thin rod 65.
  • a sleeve 70 fastened in any known way on thin rod 65, is adapted to provide a stop for the raising thereof.
  • Sleeve 70 too is shown by full lines in the raised position, and by dashed lines in the lowered position.
  • thin rod 65 is the same one mentioned above, since as it has been explained already, each plate 48 simultaneously engages with both the tailpieces of two slender rods 30 adjacent to each other, associated respectively with a piercer-carrier rod 14 and with a needle-carrier rod 3. In this case too, thin rod 65 is in the raised position, as shown in Figure 6, and tailpiece 60 is kept in the lowered position, which results in the uncoupling of needle-carrier rod 3 from plate 48. At first, provision has been made to rotate second drive shaft 63 counterclockwise, so that the arm thereof is brought to the upwards turned position shown by dashed lines.
  • first drive shaft 46 is kept in its downwards rotated position, as shown in Figure 3, so that arm 47 thereof, engaging with the projections of all the tailpieces 36 keeps the same, and therefore all the slender rods 30 connected thereto, in the lowered position which results in the disabling of the piercer-carrier rods.
  • needle-carrier rods 3 it is enough to manually operate thin rods 65, in a way similar to what has been described for piercer-carrier rods 14, i.e. lower them so that plate 48, and in partucular lower edge of vertical side 51 thereof, disengages from projection 62 of tailpiece 60 moving to the position shown by dashed lines.
  • the electromagnet means 53 are not energized, so that the moving member thereof, comprising rods 56 can be freely displaced against the bias of spring 80.
  • thin rod 65 returns to the starting position thereof, i.e. in its raised position, under the action of spring 67.
  • the device according to this invention provides a further advantageous operating alternative, comprising the possibility to manually disable one or more needle-carrier rods 3, or piercer-carrier rods 14. Said operation is now explained referring in particular to Figure 2, for one piercer-carrier rod 14 only since identical operation takes place for a needle-carrier rod 3.
  • piercer-carrier rod 14 is enabled, and to have it disabled it is only required to press on rear end portion of control lever 25, so that slender rod 30 associated therewith is lowered, and, the electromagnet 53 being de-energized, it will be permanently tensioned spring 80 itself to cause a clockwise rotation of plate 48, and therefore the engagement thereof with projection 37 of tailpiece 36, to keep the latter in a lowered position.

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  • Sewing Machines And Sewing (AREA)

Claims (12)

1. Freigabe- und Sperreinrichtung für Nadelträgerstäbe und Stecherträgerstäbe gemäß einem voreinstellbaren Programm, insbesondere in einer Schiffchenstickmaschine, umfassend Mittel zur Kupplung und Entkupplung dieser Stäbe in bezug auf eine Antriebsstange, die so ausgelegt ist, daß sie diesen eine Oszillationsbewegung vermittelt, und Steuermittel dieser Mittel zur Kupplung und Entkupplung der Nadelträgerstäbe und Stecherträgerstäbe in bezug auf die Antriebsstange, dadurch gekennzeichnet, daß die Steuermittel ein hinter und quer zu den Nadelträgerstäben (3) und Stecherträgerstäben (14) angeordnetes System aus beweglichen Stäben (30) inkludiert, die jeweils in ihrem oberen Teil mit einem Steuerhebel (25) verbunden sind, der mit den Mitteln zum Freigeben und Sperren der Nadelträgerstäbe (3) und Stecherträgerstäbe (14) zusammenwirkt, und die an ihrem unteren Ende mit im wesentlichen radial abstehenden Teilen (37, 38, 61, 62) versehen sind, wobei die den Nadelträgerstäben (3) zugeordneten Teile (61, 62) der Stäbe (30) in bezug auf die den Stecherträgerstäben (14) zugeordneten Abschnitte (37, 38) der Stäbe (30) versetzt sind, wobei eine erste Antriebswelle (46) vorgesehen ist, die einen radialen Arm (47) aufweist, der mit einem der abstehenden Teile der den Stecherträgerstäben (14) zugeordneten Stäbe (30) in Eingriff bringbar ist, um zu bewirken, daß sich dieser gleichzeitig gegen die Vorspannung eines Federmittels (35) senkt, um eine Entkupplung aller Stecherträgerstäbe (14) in bezug auf die Antriebsstange (6) zu bewirken, und zusätzlich eine zweite Antriebswelle (63) mit einem radial abstehenden Arm (64) mit einem der abstehenden Teile der den Nadelträgerstäben (3) zugeordneten Stäbe (30) in Eingriff bringbar ist, um zu bewirken, daß sie sich senken, um eine Entkupplung aller Nadelträgerstäbe (3) in bezug auf die Antriebsstange (6) zu bewirken, wobei auch Mittel zum Halten jedes Stabes (30) in abgesenkter Position vorgesehen sind, welche jeweils mit einem zweiten abstehenden Teil (62) der den Nadelträgerstäben (3) zugeordneten Stäbe (30) und mit einem zweiten Abschnitt (37) der den Stecherträgerstäben (14) zugeordneten Stäbe (30) eingreifen.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sich die erste Antriebswelle (46) über die gesamte Breite der Stickmaschine erstreckt und sich ein dieser zugeordneter radialer Arm (47) ebenfalls über die gesamte oben erwähnte Breite erstreckt und mit allen Fortsätzen (38) der den Stecherträgerstäben (14) zugeordneten Stäbe (30) in Eingriff kommt, wobei die abstehenden Teile an einer Seite der Stäbe (30) an deren unterem Ende vorgesehen sind.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sich die zweite Antriebswelle (63) über die gesamte Breite der Stickmaschine an der Seite der Stäbe (30) gegenüber jener Seite, an welcher die erste Antriebswelle (46) vorgesehen ist, erstreckt, wobei sich ein zur zweiten Antriebswelle zugehöriger radialer Arm (64) ebenfalls über die gesamte Länge erstreckt und so ausgelegt ist, daß er mit allen abstehenden Teilen (61) der den Nadelträgerstäben (3) zugeordneten Stäbe (30) in Eingriff kommt, die bezüglich der Seite, auf welcher die Fortsätze (38) vorgesehen sind, auf der gegenüberliegenden Seite der Stäbe (30) und höher als die letzteren angeordnet sind.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel, die die Stäbe (30) vorübergehend in der abgesenkten Position halten, für jeden der Stäbe (30) elektromagnetische Mittel (53) inkludieren, deren bewegliches Element (56) mit der vertikalen Seite (51) einer am Maschinenrahmen schwenkbar befestigten Platte (48) in Eingriff gelangt, wobei jede der vertikalen Seiten (51) der Platte (48) mit einem abstehenden Teil (37) eines dem Stecherträgerstab (14) zugeordneten Stabes (30) und mit einem abstehenden Teil (62) eines einem Nadelträgerstab (3) zugeordneten Stabes (30) in Eingriff bringbar ist.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das bewegliche Element (56) jedes elektromagnetischen Mittels (53) einen Stab mit einem im wesentlichen gabelförmigen Ende (57) inkludiert, der mit einem Querstift (58) versehen ist, wobei die vertikale Seite (51) der Platte (48) so ausgelegt ist, daß sie alternativ mit dem Stift (58) oder mit dem Boden (59) des gegabelten Endes des Stabes (56) in Eingriff ist zwecks Lösens bzw. Eingriffs der vertikalen Seite (51) der Platte (48) von bzw. mit den abstehenden Teilen (37, 62) der den Stecherträgerstäben (14) und den Nadelträgerstäben (3) zugeordneten Stäbe (30).
6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede Platte (48) im wesentlichen L-förmig ist und daher mit einer im wesentlichen horizontalen Seite (52) versehen ist, die mit einem weiteren Stab (65) von geringerer Höhe als die Stäbe (30) in Eingriff bringbar ist, wodurch die Platte (48) von den abstehenden Teilen (37,62) der Stäbe (30) außer Eingriff gebracht werden kann.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß sich dünne Stäbe (65) parallel zu den Stäben (30) erstrecken und in einem Maschinenrahmen gegen die Wirkung eines Federmittels (67) gleitbarsind, um mit der horizontalen Seite (52) der Platten (48) in Eingriff zu gelangen, wobei ein Anschlagelement (70) vorgesehen ist, um die durch die Federmittel (67) bewirkte Verschiebung zu begrenzen.
8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Stecher (13) von einer im wesentlichen L-förmigen, rechtwinkeligen Verbindungslasche (15) getragen werden, die wiederum am Ende eines Stecherträgerstabes (14) befestigt ist.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß das rechtwinkelige Verbindungselement (15) eine vertikale Seite hat, an deren oberem Ende das Ende des Stecherträgerstabes (14) befestigt ist, und eine horizontale Seite, an deren freiem Ende der Stecher (13) befestigt ist, weshalb derstechervertikal unterhalb einer Nadel (1) angeordnet ist.
10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß an der Ecke des rechtwinkeligen Elements (15) das Ende eines Stabes (19) befestigt ist, der gleitbar in einem Querelement (5) in Eingriff gehalten ist, in welchem die Nadelträgerstäbe (3) und die Stecherträgerstäbe (14) gleiten können, wobei der Stab (19) so ausgelegt ist, daß er Drehungen des rechtwinkeligen Elements (15) um eine Achse parallel zur Bewegungsrichtung des Stecherträgerstabes (14) hemmt.
11. Vorrichtung zur Freigabe und Sperrung von Nadelträgerstäben und Stecherträgerstäben, umfassend für jeden dieser Stäbe einen Schwenksteuerarm (9), der mit einem Verbindungsstift (10) zusammenwirkt, um den Nadelträgerstab oder den Stecherträgerstab mit der einzigen Antriebsstange (6) zu kuppeln, dadurch gekennzeichnet, daß diese oszillierenden Steuerarme und Verbindungsstifte (10) alle in derselben Ebene liegen.
12. Stickmaschine, insbesondere Schiffchenstickmaschine, die mit einer Vorrichtung nach dem Ansprüchen 1 bis 11 versehen ist.
EP86830154A 1986-01-21 1986-06-06 Selektionsmechanismus für Nadeln und Stecher auf Stickmaschinen Expired - Lifetime EP0230211B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86830154T ATE56055T1 (de) 1986-01-21 1986-06-06 Selektionsmechanismus fuer nadeln und stecher auf stickmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1912986 1986-01-21
IT19129/86A IT1188284B (it) 1986-01-21 1986-01-21 Dispositivo per l'attivazione e disattivazione di barre porta-ago e barre porta-perforatore secondo un programma preimpostabile,particolarmente in una macchina ricamatrice a navetta

Publications (3)

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EP0230211A2 EP0230211A2 (de) 1987-07-29
EP0230211A3 EP0230211A3 (en) 1988-01-13
EP0230211B1 true EP0230211B1 (de) 1990-08-29

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EP86830154A Expired - Lifetime EP0230211B1 (de) 1986-01-21 1986-06-06 Selektionsmechanismus für Nadeln und Stecher auf Stickmaschinen

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EP (1) EP0230211B1 (de)
AT (1) ATE56055T1 (de)
DE (1) DE3673798D1 (de)
IT (1) IT1188284B (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1226235B (it) * 1988-07-08 1990-12-27 Comerio Ercole Spa Dispositivo per la attivazione e disattivazione di un perforatore inuna macchina ricamatrice, trapuntatrice o simili provvisto diun attacco snodabile del perforatore.
DE9108861U1 (de) * 1991-07-18 1991-09-19 Zsk Stickmaschinen Gmbh, 4150 Krefeld Stickkopf für Stickmaschinen
IT1251850B (it) * 1991-09-23 1995-05-26 Comerio Ercole Spa Dispositivo per l'innesto e il disinnesto delle barre degli aghi e delle barre dei perforatori in una macchina ricamatrice
CN114469282B (zh) * 2022-03-31 2022-07-01 真健康（北京）医疗科技有限公司 正交结构五自由度穿刺机器人

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649065A (en) * 1948-12-07 1953-08-18 Electrotext Corp Embroidery machine and coded-tape control means
IT1062146B (it) * 1976-07-28 1983-06-25 Comerio Ercole Spa Perfezionamenti relativi ad una macchina ricamatrice a telaio tipo plauen o simili
DE3047928A1 (de) * 1980-12-19 1982-07-01 Maschinenfabrik Carl Zangs Ag, 4150 Krefeld Stickmaschine
CH651333A5 (de) * 1981-02-04 1985-09-13 Saurer Ag Adolph Stelleinrichtung fuer eine mechanische schalthebelanordnung an einer stickmaschine.

Also Published As

Publication number Publication date
IT8619129A0 (it) 1986-01-21
IT1188284B (it) 1988-01-07
ATE56055T1 (de) 1990-09-15
EP0230211A2 (de) 1987-07-29
DE3673798D1 (de) 1990-10-04
EP0230211A3 (en) 1988-01-13

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