EP0230211B1 - Enabling and disabling device for the needle-carrier rods and piercer-carrier rods according to a presettable program, in particular for a shuttle embroidery machine - Google Patents
Enabling and disabling device for the needle-carrier rods and piercer-carrier rods according to a presettable program, in particular for a shuttle embroidery machine Download PDFInfo
- 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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- European Patent Office
- Prior art keywords
- rods
- carrier
- piercer
- needle
- rod
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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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Abstract
Description
- 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. In general, provision has been made on the machine for two separate drive systems, one for the needle-carrier rods and a second one for the piercer-carrier rods but, as it is apparent, such an approach has made the embroidery machine extremely complicated from a manufacturing and operating standpoint. In fact, the provision for two separate drive bars adapted to transmit a reciprocating motion for the operation of the needle-carrier rods and piercer-carrier rods respectively, obviously involves the requirement that two separate connection systems are provided between each drive bar and the rods (needle-carrier and piercer-carrier rods) driven thereby. In practice, the embroidery machine becomes extremely complicated, and therefore both the operation thereof and the maintenance that is possibly required, become difficult.
- An embroidery machine of the kind mentioned above is disclosed in the German Utility Model No. 80 21 864 filed on August 16, 1980, assigned to Maschinenfabrik Carl Zangs AG, and issued November 13,1980. The machine disclosed in the above mentioned patent is in fact a shuttle embroidery machine and two embodiments of the same are disclosed and claimed, having in common the feature that they are provided with a first drive bar for the reciprocating motion, engageable with the needle-carrier rods, and a second drive bar for the reciprocating motion, engageable with the piercer-carrier rods. 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. In the second embodiment, 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.
- As it is apparent, a machine of this kind is extremely complicated, both in the first and in the second embodiment, and it is easily understood that programming such a machine is difficult, and there is a limitation to the feasable programs. This is supplemented by the fact that, when it is desired to change the operating program of the machine, it is compulsory to replace at least one or both the splined shafts of the first embodiment, or the single splined shaft of the second embodiment. This operation, besides being complicated and requiring a lot of care, obviously calls for a complete shut down of the machine.
- 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. In fact, 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. In addition, 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. There is provided 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.
- Taking into account what has been discussed above, the same conclusions apply for the above machine, as for the shuttle embroidery machine disclosed in the German Utility Model assigned to Karl Zangs Company.
- Another machine where an attempt has been made to solve the problem of the coupling of the needle-carrier rods and of the piercer-carrier rods, to their respective drive bars, has been the subject of the German Patent Application filed on December 19, 1980, assigned to Maschinenfabrik Karl Zangs AG, and issued July 1, 1982 under No. 3 047 928.
- The quite a few figures of the above mentioned Patent illustrate a needle-carrier rod and alternate solutions for the coupling of such rod to a drive bar for the oscillating motion. However, it is made apparent in the disclosure how the same coupling, in all the variations thereof which are provided, can be applied to a piercer-carrier rod. It is therefore understandable that both the needle-carrier rods and the piercer-carrier rods are provided with their own means for connection to the drive bar, said means being always provided, for all the embodimental variations, as a magnetic means, either an electro-magnetic means or a permanent magnet means.
- Therefore, all of the embodimental variations of the above patent rely upon the attractive force of a magnet means for the coupling of the needle-carrier rods, and of the piercer-carrier rods respectively, to the drive bar, which can be assumed to be single, but it is easily understood that a connection of this kind cannot guarantee a secure coupling between the rods and the drive bar. Besides, the subject machine has a particularly high energy consumption for magnet excitation, therefore its operation is highly demanding.
- Another machine where an attempt has been made to solve the above problem is the one disclosed in the German Utility Model No.
G 80 16375.3, filed on June 20, 1980, assigned to Mr. August Heinzle, and issued on April 30, 1981. - 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. In fact, it is noted that 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.
- The 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.
- As it is apparent, a machine of this kind is scarcely reliable, since the needle-carrier rods and piercer-carrier rods have a weakening point located at the pivot point with said swinging arms, and said pivot connection reduces the operating possibilities of the machine, in particular concerning embroidery on heavy or multilayer fabrics, on leather or pelt, and plastic materials.
- Moreover, 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.
- Besides, 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. In fact, 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.
- Besides, all of the above mentioned machines are highly noisy in operation, which is very inconvenient for the machine operators.
- There has now been contrived, and it is the subject of this invention, a device for enabling or disabling the needle-carrier rods, or the piercer-carrier rods in an embroidery machine having a single reciprocating motion drive bar, which device overcomes the drawbacks mentioned above.
- It is worthy of note the fact that 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.
- As it will become apparent from the following, 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.
- A connection system of this kind, that has proved thoroughly reliable and free from annoying noise generation, has been used as well in Patent Application No. 24099A/82 filed November 5, 1982 in the name of the same Applicant. Through the development of the initial concept of the above menioned Italian Patent of the same Applicant, this machine has made it possible to obtain a device adapted to perform needle insertion and/or withdrawal in an embroidery machine, according to widely variable programs and also while the machine is in operation, i.e. doing away with the considerable drawback of having to shut down the machine when the sewing program has to be changed.
- The device according to this invention is a particularly advantageous further development of the machines disclosed in the Patent and in the Pat. Application mentioned above, of the same Applicant, and the features as well as advantages thereof will become apparent from the following detailed description of a non limiting embodiment thereof, where reference is made to the attached drawings, in which:
- Figure 1 is a partially cutaway perspective view of the embroidery machine provided with the device in accordance with this invention;
- Figure 2 is a side sectional view showing a piercer-carrier rod actuation;
- Figure 3 is a view similar to Figure 2, showing the device according to this invention, in the condition where the piercer-carrier rod is disabled or idle;
- Figure 4 is a cross section showing how a piercer-carrier rod is manually disabled;
- Figure 5 is a cross-section showing how a needle-carrier rod is actuated;
- Figure 6 shows how a needle-carrier rod is brought from the active position into an idle position;
- Figure 7 is a schematic showing the device of this invention, along section line VII-VII of Figure 2.
- Referring first to Figures 1 and 5, 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 incross 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. their coupling to drivebar 6 reciprocating according to the direction indicated by the double-pointed arrow F in Figure 5, is provided as specified below and, as it has been mentioned above, this coupling is related to the coupling features used in the aforementioned patents of the same Applicant, which have made it possible to thoroughly develop and complete the innovational concept of the inventive device, which will be explained in the following. The coupling between needle-carrier rods 3 anddrive bar 6 mentioned above is hereinafter recalled in the essentials thereof, for ease of understanding. - At the end thereof opposite to the one where needle 1 is fastened, 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 aprojection 8 for engagement with the rear face ofdrive bar 6. - On the upper side of block 7 there is provided 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 connectingpin 10 slidingly engaged in a transverse opening located in a substantially rear portion of needle-carrier rod 3. Connectingpin 10 protrudes down from needle-carrier rod 3, and the end portion thereof projecting out from said rod is meant to come into engagement withdrive bar 6, and in particular with anupper projection 6a thereof. - In such a position,
drive bar 6 is retained betweenprojection 8 of block 7 fastened to needle-carrier rod 3, and the lower end ofpin 10 projecting from said needle-carrier rod 3. Therefore, as it is shown in particular in Figure 5, the latter is forced to follow the motion ofdrive bar 6, i.e. to reciprocate between the full line position and the dashed line posiiton. This is the enabled condition of needle-carrier rod 3, in which needle 1 associated thereto performs a normal sewing operation. - Needle-
carrier rod 3 can be brought to a disabled condition where it is disengaged fromdrive bar 6. That is made possible by raising connectingpin 10 up to the position shown in Figure 6, where the pin is completely disengaged relative to drivebar 6. Raising of connectingpin 10 is provided through counterclockwise rotation ofcontrol arm 9. To that end, drivearm 9 is pivoted on apivot 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 pivotshaft 11 and acting in such a way as tobias control arm 9 to the position shown in Figure 5, where it arrangesconnection pin 10 in engagement withdrive rod 6. Therefore, the counterclockwise rotation necessary to disengageconnection pin 10 fromdrive bar 6 is carried out against the bias of the resilient means mentioned above. - Referring now in particular to Figures 1 to 3, 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 drivebar 6, but they are mounted on asquare bracket 15 connected to said piercer-carrier rod 14 which consequently subjects saidpiercers 13 to the required reciprocating motion. Saidsquare 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 connectingbrackets 15 comprise a substantially L-shaped body allowing thepiercer 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 andpiercers 13 operate along parallel and superimposed directions, therefore very close as required in any embroidery machine. - The transmission of reciprocating motion of piercer-
carrier rod 14 to thepiercer 13 by means ofsquare bracket 15 is carried out as follows. -
Front end 16 of piercer-carrier rod 14 is inserted in an opening provided in the upper portion of vertical side of square connectingbracket 15, being fastened thereto by means of aset screw 17. In this way, whenrod 14 reciprocates according to the direction of double pointed arrow G of Figure 2, it draws therewith square connectingbracket 15 that reciprocates accordingly between the full line position and the dashed line position. - As it appears in particular from Figure 1, square connecting
bracket 15 has fastened to it theend 18 of arod 19, which is slideably engaged within abore 20 provided throughcross member 5, exactly underneath bore 21, provided throughcross member 5 as well, wherein piercer-carrier rod 14 is slideably engaged. More particularly,front end 18 ofrod 19 is fastened at the corner of square connectingbracket 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). - Therefore,
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 connectingbracket 15, projecting from the front thereof, as it is apparent in particularfrom Figures 1 to 3. - The main purpose of
rod 19 is not to transmit a driving motion topiercer 13, since that is performed by square connectingbracket 15 adapted to transmit directly topiercer 13 the reciprocating motion ofrod 14.Rod 19 is provided in order to inhibit rotation of square connectingbracket 15 in a plane substantially perpendicular to the plane where the reciprocating path ofrod 19 is contained. Therefore,rod 19 main function, is a stabilizing function forpiercer 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. - Coupling and uncoupling of piercer-
carrier rod 14 relative to drivebar 6 takes place in a way substantially similar to that of needle-carrier rod 3, therefore the devices provided for that purpose, in addition to bearing the same reference numbers are not described in detail, but only the essential components thereof are mentioned. In Figures 2 and 3 block 7 is noticed, fastened to the rear portion of piercer-carrier rod 14. On the upper part thereof it is rotatably mountedcontrol arm 9, in engagement withpin 10 connecting piercer-carrier rod 14 to drivebar 6 In the condition shown in Figure 2, connectingpin 10 is located in the lowered position and drivebar 6 is therefore retained betweenprojection 8 of block 7 and the lower end of connectingpin 10. In this way, piercer-carrier rod 14 performs a reciprocating motion as it is shown by dashed lines in Figure 2, andpiercer 13, through the connection described above, performs a reciprocating motion as well, still shown by dashed lines in Figure 2. - Disengagement of piercer-
carrier rod 14 fromdrive bar 6, and therefore the stopping thereof, is obtained by raising connectingpin 10, as it is shown in Figure 3, so that it disengages fromdrive bar 6 reciprocating according to the direction of double pointed arrow H of Figure 3 without carrying piercer-carrier rod 14 therewith. Raising of connectingpin 10 is provided by movingcontrol arm 9 with a counterclokwise rotation against the bias of said resilient means (not shown in this case either) provided on thepivot shaft 11 thereof, and said operation is carried out as it will be explained more particularly in the following. - It should now be noticed, referring to Figures 2 and 3 as far as piercer-
carrier rods 14 are concerned, and to Figure 5 as far as needle-carrier rods 3 are concerned that substantially upright branch 9a ofcontrol arm 9 is slideably engaged within alongitudinal slot 22 machined through aheavy plate 23 which is fastened at the front end thereof to thestationary cross member 5 of the embroidery machine frame, and at the rear portion thereof to a furtherstationary cross member 24 which is a part of the embroidery machine stationary frame as well. The number oflongitudinal 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 acontrol arm 9, and therefore with a branch 9a - which has to be slidable in aslot 22 thereof. This should become apparent from an examination of Figure 1, wherein the embroidery machine has been only partially shown and, as it can be seen, there is provided aslot 22 for each branch 9a ofarms 9, both the ones associated with a needle-carrier rod 3, and the ones associated with a piercer-carrier rod 14. - Moreover, the upper ends of branches 9a of
control arms 9 always project above theheavy plate 23 throughslots 22, both in the engaged position of needle-carrier rods 3 and of piercer-carrier rods 14 (Figure 5 and Figure 2), and in the disengaged position of said rods relative to drive bar 6 (Figure 6 and Figure 3). As shown above, the coupling and disengagement of needle-carrier rods 3 and of piercer-carrier rods 14 relative to drivebar 6 is obtained in both cases through a counterclockwise rotation ofcontrol arm 9, which causes connectingpin 10 to raise, or viceversa through a clockwise rotation ofcontrol arm 9 which allows the connectingpin 10 to lower and to come into engagement withdrive bar 6, through the bias of a spiral spring (not shown) mounted onpivot shaft 11. Said operations, both concerning needle-carrier rods 3 and concerning piercer-carrier rods 14, are obtained as explained in detail in the following. - As it may be seen in particular in Figure 1, but it is also apparent from Figures 2, 3 and 5, each needle-
carrier rod 3 and each piercer-carrier rod 14 has associated therewith, aboveheavy plate 23, acontrol lever 25 extending aboveslot 22 and therefore abovecontrol 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 abent portion 26 through which it engages the upper end of branch 9a ofcontrol arm 9. -
Levers 25 are pivoted, at the front end thereof, i.e. on the needle 1 andpiercer 13 side, on acommon shaft 27, mounted on support lugs 28 that are fastened, at the lower end thereof, in atransverse groove 29 provided on top of thestationary cross member 5. More particularly, support lugs 28 are inserted all the way, with a substantially close fit throughheavy plate 23, so that they are fastened, at the lower end thereof, ingroove 29 ofstationary cross member 5. In 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 remaininglevers 25 and lugs 28 are identical to the ones shown. - Referring now in particular to Figures 2 and 3, there is illustrated the actuating mechanism of
levers 25 which are associated with piercer-carrier rods 14 and, therefore, the way they cause the disengagement of piercer-carrier rods 14 fromdrive bar 6 is shown. Referring first to Figure 2, levers 25 can take the position shown in said Figure, and this should be considered the "raised" position, where branch 9a ofcontrol arm 9 is not biased to turn counterclockwise, whereby it keeps connectingpin 10 in a lowered position where the lower end thereof engagesdrive bar 6 thereby providing for the coupling between piercer-carrier rod 14 and drivebar 6. Control levers 25 can take a second position as well, i.e. the one shown in Figure 6, which can be considered the "lowered" position wherein branch 9a ofcontrol arm 9 is biased to turn counterclockwise whereby the second branch 9b ofcontrol arm 9causes connecting pin 10 to raise and consequently disengage fromdrive bar 6. piercer-carrier rod 14 is now in the disabled, i.e. non operating condition. - The means controlling the above mentioned motion of
levers 25 from the position shown in Figure 2 to that shown in Figure 3, and vice versa, are described in the following. - Said means include, for each
control lever 25, a vertically extendingslender rod 30 connected at the top thereof to the rear end portion ofcontrol lever 25. For that purpose,slender rod 30 projects aboverear cross member 24 through abore 31 thereof, wherein it is slidably accepted. On the upper end ofslender rod 30 there is fastened in any known way afork member 32 provided with across pin 33 whereon anenlarged portion 34 of rear end portion ofcontrol lever 25 is pivoted. Between the body offork member 32 fastened at the upper end ofslender rod 30 and the upper surface ofcross member 24 there is inserted resilient means, comprising acoil spring 35 arranged aroundslender rod 30.Spring 35 purpose is to allow for a temporary rotation ofcontrol lever 25 aroundpivot 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 ofslender rod 30, which are provided at the lower end thereof, as it will be described. - Furthermore,
spring 35, as it is apparent in particular from Figure 2, keepscontrol lever 25 slightly raised relative to branch 9a ofcontrol arm 9, to avoid that, when needle-carrier rod 3 and piercer-carrier rod 14 are enabled, said branch 9a ofcontrol arm 9 rubs against the lower surface ofcontrol lever 25. - At the lower end of
slender rod 30 there is fastened atailpiece 36 comprising a substantially rectangular body whose length is large compared to the width thereof, the width being slightly larger thanslender rod 30 diameter. On a face oftailpiece 36, more particularly on the face located on the side of fabric T, there is provided anupper projection 37 and alower projection 38, substantially of the same length. On the rear portion of theupper projection 37 there is provided astep 39 whose purpose will become apparent in the following. In the lower portion of the frame of the embroidery machine provided with the device according to this invention there is provided referring in particular to Figure 1, guide means oftailpieces 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-shapedsection 40 whosehorizontal side 41 is substantially comb-shaped, being provided for said purpose with a plurality of substantiallyrectangular projections 42 which defineslots 43 oftailpieces 36. Advantageously,section 40 is supported in any known way by asupport angle section 44 substantially L-shaped as well, which supports vertical side ofsection 40 fastened tovertical side 45 thereof. - As decribed above, the lowering of
slender rods 30 in a vertical direction makes control levers 25 to rotate counterclockwise with a corresponding counterclockwise rotation ofcontrol arms 9 associated with the piercer-carrier rods 14 which are in turn disabled. Said operation is automatically performed through asingle drive shaft 46 provided with acontrol arm 47 radially projecting therefrom and which simultaneously comes into engagement with all thelower projections 38 oftailpieces 36. In this way, when known means (not shown) makeshaft 46 to rotate counterclockwise, according to the direction of arrow S in Figure 3,arm 47 engaging with all theprojections 38 oftailpieces 36, makesslender rods 30 to lower with a counterclockwise rotation ofcontrol levers 25 which disables all the piercer-carrier rods 14. The device according to this invention also includes means to keep temporarily locked theslender rods 30 in the lowered position thereof, said means allowing, in the disabled condition thereof, a raising of any number ofslender rods 30 according to a predetermined sewing program. Said means are described hereinafter. The means keeping theslender 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-shapedmetal plates 48 which, at thecorner 49 thereof are freely pivoted on acommon shaft 50 extending for the whole length of the embroidery machine. The number ofmetal plates 48 is equal to the number ofslender 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 eachmetal plate 48 engages simultaneously with aprojection 62 of atailpiece 60, and with theprojection 37 oftailpiece 36 adjacent thereto. - As it will be noted in particular from Figures 1 to 3, and also from Figure 7,
vertical side 51 ofmetal plates 48 is substantially bent with the concave side thereof facing theslender rods 30 and the lower edge thereof comes into engagement, at least with a portion thereof, withstep 39 oftailpiece 36 integral withslender rod 30 when the latter has been brought in the lowered position thereof through the action ofdrive shaft 46 shown in detail in Figure 3. - To keep all the
slender rods 30 in the lowered position thereof, which disables all the piercer-carrier rods 14 accordingly, it is therefore enough thatshaft 46 is rotated in the direction of arrow S, so that thearm 47 thereof, coming into engagement withprojections 38 oftailpieces 36, causes theslender rods 30 to lower. - Subsequently all the
metal plates 48 are brought to the position shown in Figure 3, in a way that will be described in detail hereinafter, and in this position a portion of lower edge ofvertical side 51 ofmetal plates 48 comes into engagement withstep 39 oftailpieces 36. There are now two operating alternatives for the embroidery machine: according to the first one, thepiercers 14 are kept disabled, so that-shaft 46 is kept in the position shown in Figure 3, while, according to the second one, it is possible to enable a plurality ofpiercers 16 and in this case provision is made to cause in a way per se known a rotation ofshaft 46 in a opposite direction compared to the first alternative, so thatslender rods 30 are kept at first in the lowered position due to the arrangement ofmetal plates 48 mentioned above. Thereafter,slender rods 30 can be raised again, according to the predefined program, by disengagement ofmetal plates 48, i.e. movingvertical 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 withstep 39 oftailpiece 36, to enable the number ofslender rods 30 involved to move up again to the "raised" position under the bias ofspring 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 totailpieces 36 preferably comprise electromagnet means 53 whose core is carried by abracket 54 in turn fastened in any known way underneath a heavystationary plate 55 which is part of the embroidery machine frame, whereon there is also supportedshaft 50 where themetal plates 48 are pivoted. -
Rod 56 comprising the moving element of electromagnet means 53, has a fork-shapedfree end 57 only one prong of which is shown in Figures 2 and 3, saidend 57 being shown in cross-section. On the front portion of forkedend 57 ofrods 56 there is provided across pin 58, andvertical side 51 ofmetal plates 48 is inserted in the space between saidpin 58 and bottom 59 of the forkedend 57 ofrods 56. In this way, whenrods 56 are in the position shown in Figure 2, i.e. said rods are recalled in the core of electromagnet means 53,metal plates 48 are disengaged fromtailpieces 36 associated therewith, in thatside 51 is rotated counterclockwise due to its engage;-- ment withpin 58 ofrods 56. This actuation of electromagnet means 53, in particular the re-entry ofrods 56 thereof in the respective core is carried out electromagnetically, in that all theelectromagnets 53 where it is desired thatrod 56 is recalled within the core thereof, are supplied with a suitable voltage, causing the motion mentioned above. On the contrary, as it is noticed in particular in Figure 3, whenrods 56 of electromagnet means 53 are caused to project from the core of said means, pin 58 of forkedend 57 ofrods 56 comes out of engagement withvertical side 51 ofplates 48, while the latter now comes into engagement with the bottom 59 of the forkedend 57 ofrods 56 causing a clockwise rotation, opposite to the former one ofvertical side 51 whose lower edge then comes into engagement withstep 39 oftailpiece 36. This second actuation of electromagnet means 53, i.e. the projection ofrods 56 out of the respective core, is obtained in a purely mechanical manner in that, on eachrod 56 there is wound acoil spring 80 which engages, at a first end thereof, againstsupport bracket 54 for the electromagnet means 53, and at the other end thereof, againstside 51 ofplate 48. When it is desired thatrods 56 are projected out of the core of electromagnet means 53, it is enough that the latter are de-energized so that the spring can cause said motion spontaneously, by a resilient action. - Referring now in particular to Figure 5, there will be discussed the way in which the enabling and disabling of needle-
carrier rods 3 is carried out, i.e. how they are brought to the operating, condition, or to the disabled condition. In this respect, the operation and the structure of the inventive device are substantially the same as those used for enabling and disabling piercer-carrier rods 14. Therefore, for this part of the invention only the main points will be recalled, and the same members are indicated with the same reference numbers, and the differences will be pointed out. 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 drivebar 6. The illustration of the same part of the device shown in Figure 5 with the needle-carrier rod 3 in the disabled condition has been omitted, since this condition can be easily derived both from Figure 5 and in that it is completely similar to the corrsponding operating phase of the piercer-carrier rods 14. - Referring to said Figure, needle-
carrier rod 3 is connected to drivebar 6 in that connectingpin 10 is in the lowered position thereof sincecontrol lever 25 associated therewith is in its "raised" condition.Spring 35 is in the extended condition thereof, in which it keepscontrol lever 25 raised slightly above branch 9a ofcontrol arm 9 and correspondingly raisesslender rod 30 which is pivoted above said control lever. Connection betweenslender rod 30 andcontrol 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 atailpiece 60 of a substantially rectangular shape having a considerable length compared to the, diameter ofrod 30, while its width is slightly larger that the latter.Tailpiece 60, in the upper part thereof, is provided, on opposite faces, with twoprojections rear projections 61 facing the rear portion of the embroidery machine, whileprojection 62 faces the same side ofprojections tailpieces 36. The length ofprojections projections tailpieces 36. - To control lowering of
slender rods 30 associated with saidtailpiece 60, i.e. to disable a needle-carrier rod 3 against the bias ofspring 35, there is provided asecond drive shaft 63 supported in any known way by the machine frame, and which is provided with aradially projecting arm 64, similar toarm 47 associated to driveshaft 46, adapted to come into engagement at the end thereof withrear projections 61 oftailpieces 60. To disable simultaneously all the needle-carrier bars 3, it is enough to cause the lowering of all theslender rods 30 associated therewith and for that purpose a clockwise rotation ofdrive shaft 63 is actuated, whose direction is indicated by arrow R in Figure 5, and the motion of the shaft and associated arm that follows, is illustrated in Figure 6, wherearm 64 is shown by a dashed line in the raised position thereof, and by a full line in the rotated position thereof. - It should be noted that
arm 64 associated withsecond drive shaft 63, similarly toarm 47 associated withfirst 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 toarm 47. The fact thatarm 47 offirst shaft 46 comes into engagement only withprojections 38 oftailpieces 36 connected toslender rods 30 associated with piercer-carrier rods 14, whilearm 64 of second drive shaft comes into engagement only withprojections 61 pertaining totailpieces 60 ofslender rods 30 associated with needle-carrier rods 3, is due to the particular shape oftailpieces second drive shafts - In fact,
projections 38 oftailpieces 36 are located in the lower front part of said tailpieces, whiletailpieces 60 are not provided with lower projections. Therefore, no interference is possible betweenarm 47 offirst drive shaft 46 andtailpieces 60.Projections 61 of the latter, that are engaged byarm 64 ofsecond drive shaft 63, are located upwards and rearwards. On theirrear side tailpieces 36 do not have any projection. Therefore, in this case as well interference is precluded betweenarm 64 ofsecond drive shaft 63 and thetailpieces 36. On the contrary,projections 37 ontailpieces 36, andprojections 62 oftailpieces 60 being provided in order to keep the variousslender rods 30 in the lowered position thereof in cooperation withplates 48 are located on the same side, and substantially at the same height. This is so in that electromagnet means 53 andplates 48 are all located on the same side ofslender rods 30, i.e. on the side where needle-carrier rods 3 and piercer-carrier rods 14 come out. This way, as it can be noticed in particular from Figure 5, also in connection withtailpieces 60 associated with needle-carrier rods 3, the relevantfront projections 62 cooperate withplates 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 ofvertical side 51 of aplate 48 relative to twoadjacent tailpieces front projections vertical side 51, at a portion thereof (more precisely the right side portion looking at Figure 7) engages with projections oftailpiece 36 ofslender 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 withprojection 62 oftailpiece 60 pertaining toslender 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 enablingpiercer rods 14. For reasons of clarity only, the essentials of this operation are recalled hereinafter. - Starting from the situation shown in Figure 5, wherein all the needle-carrier rods can be assumed to be enabled, (for instance when the machine is shut down) a clockwise rotation, for instance according to the direction of arrow T of Figure 5, is given to
second drive shaft 63, so thatarm 64 thereof causes all the tailpieces 60 (and therefore the slender rods 30) to lower because of the engagement withprojections 61 pertaining to said tailpieces. At this point, all of the needle-carrier rods 3 are disabled and, as in the preceding case of the piercer-carrier rods 14, a double choice is possible. A first alternative is that provision is made so that all the needle-carrier rods 3 remain disabled, therefore driveshaft 63 remains in the rotated position as it was described above, and so thatfirst drive shaft 46 is actuated in order to allowslender rods 30 associated with piercer-carrier rods 14 to raise, when correspondingplates 48 are disengaged by electromagnet means 53. As it is apparent, for each actuated plate, in this case thoseslender 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 ofsecond 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. In this case, while on onehand drive shaft 46 is kept in the rotated position, i.e. witharm 47 thereof in the lowered position, and all the piercer-carrier rods 14 are disabled, on the other handsecond drive shaft 63 is rotated in a direction opposite to the former one to cause it to disengage fromprojections 61 oftailpieces 60 pertaining toslender rods 30 associated with needle-carrier rods 3, saidtailpieces 60 then remaining in their lowered position for engagement withcorresponding plates 48. When a plurality ofplates 48 disengage fromtailpieces second drive shaft 63 and because of the action ofsprings 35, while on the other hand all thetailpieces 36 associated with piercer-carrier rods 14will remain in the lowered position thereof for the above mentioned reason. - The device according to this invention, owing to the operation it provides as discussed above, offers two alternatives and in particular a first alternative corresponding to energizing a certain number of
electromagnets 53 to disengageplates 48 while a drive shaft, for instancefirst shaft 46, is in the rotated position thereof, so thatpiercers 13 are not actuated. A second alternative corresponds as well to energizing a certain number ofelectromagnet 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. Simultaneously, the first drive shaft is rotated in a direction opposite to the preceding one, which had provided for lowering thetailpieces 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. - In addition, 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 ofthin 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 aslender rod 30 associated with a needle-carrier rod 3 and aslender rod 30 associated with a piercer-carrier rod 14. Said additionalthin rods 65 are located abovehorizontal side 52 ofplates 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. - More precisely, Figure 4 refers to preceding Figure 3, i.e. it shows the portion of the device concerning a piercer-
carrier rod 14. However, it is enough to extend said Figure, without resorting to another illustration, to the case of a needle-carrier rod 3, being only necessary to consider Figure 4 and replacetailpiece 60 totailpiece 36, andsecond drive shaft 63 tofirst drive shaft 46, for the operation of thisrod 65 of needle-carrier rod 3 to become apparent. - Considering first Figure 4, concerning the case of a piercer-
carrier rod 14, it can be noticed thatfirst drive shaft 46 is in the upwards rotated position and, in fact,arm 47 thereof is substantially horizontal and raised relative toprojection 38 oftailpiece 36. The latter is kept in the lower position thereof with a corresponding disengagement of piercer-carrier rod 14 fromplate 48 whoseside 51 engages withupper projection 37. Simultaneously,side 58 ofplate 48 engages withprojection 62 pertaining to tailpiece 60 associated with a needle-carrier rod 3, but, as it has been mentioned above, it should be noticed thatsecond drive shaft 63, as shown in Figure 6, is now in the downwards rotated position thereof and itsarm 64 engages againstprojection 61 oftailpiece 60. Apparently, for the subject case, where actuation of a piercer-carrier rod 14 is desired,second drive shaft 63 will be kept in the position shown in full line in Figure 6, so that actuation ofplate 48 as mentioned above will causetailpiece 60 to remain in the lowered position and the associated needle-carrier rod 3 will be kept disabled. - 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 ofthin rod 65 for related lowering thereof, so that its lower end, coming into engagement againsthorizontal side 52 ofplate 48, drives the latter to rotate counterclockwise therefore disengaging itsvertical side 51 fromprojection 37 pertaining totailpiece 36. As a result of this operation,slender rod 30 under the action ofspring 35 will return to the "raised" position thereof and as a consequence a clockwise rotation oflever 25 enables a corresponding clockwise rotation ofcontrol arm 9 which causes connectingpin 10 to lower into engagement withdrive bar 6. Lowering ofthin rod 65 and the related rotation ofplate 48 are shown by dashed lines in Figure 4. - Once this operation has been accomplished,
thin rod 65 automatically returns to the starting position being biased by areturn spring 67, which operates between across member 68 located underneathstationary cross member 24 and provided with abore 69 for through passage ofthin rod 65. Asleeve 70, fastened in any known way onthin 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. - Similarly to what has been discussed above for the piercer-
carrier rods 14, there is provided the possibility of manual insertion for needle-carrier rods 3 as well. Said possibility is briefly described in the following, still referring in particular to Figure 4, but referring now, for clarity, to Figures 3 and 6 as well. - It is assumed that
thin rod 65 is the same one mentioned above, since as it has been explained already, eachplate 48 simultaneously engages with both the tailpieces of twoslender 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, andtailpiece 60 is kept in the lowered position, which results in the uncoupling of needle-carrier rod 3 fromplate 48. At first, provision has been made to rotatesecond drive shaft 63 counterclockwise, so that the arm thereof is brought to the upwards turned position shown by dashed lines. Simultaneously,first drive shaft 46 is kept in its downwards rotated position, as shown in Figure 3, so thatarm 47 thereof, engaging with the projections of all thetailpieces 36 keeps the same, and therefore all theslender rods 30 connected thereto, in the lowered position which results in the disabling of the piercer-carrier rods. - If manual actuation of needle-
carrier rods 3 is desired, it is enough to manually operatethin rods 65, in a way similar to what has been described for piercer-carrier rods 14, i.e. lower them so thatplate 48, and in partucular lower edge ofvertical side 51 thereof, disengages fromprojection 62 oftailpiece 60 moving to the position shown by dashed lines. Similarly to the case of piercer-carrier rods 14, in this case too the electromagnet means 53 are not energized, so that the moving member thereof, comprisingrods 56 can be freely displaced against the bias ofspring 80. - Once enabling of needle-
carrier rod 3 has been obtained, in the way mentioned above,thin rod 65 returns to the starting position thereof, i.e. in its raised position, under the action ofspring 67. - Eventually, 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. - Referring now to said Figure, piercer-
carrier rod 14 is enabled, and to have it disabled it is only required to press on rear end portion ofcontrol lever 25, so thatslender rod 30 associated therewith is lowered, and, theelectromagnet 53 being de-energized, it will be permanently tensionedspring 80 itself to cause a clockwise rotation ofplate 48, and therefore the engagement thereof withprojection 37 oftailpiece 36, to keep the latter in a lowered position. - As a direct consequence of said operation, it will be possible to actuate again piercer-
carrier rod 14 through energization ofelectromagnet 53. - From what has been described above, there becomes apparent the various operating alternatives of the embroidery machine provided with the device according to this invention, which enables the same machine to be preset according to several different and modifiable programs, said programming being easily and rapidly done, so that the operating speed of the machine is very high. Moreover, all the control means of the device according to this invention, obviously excepting the manual control, can be completely automated. It should be noted for that purpose that, besides an electronically controlled programming of electromagnet means 53, it is also possible to electronically program the actuation of
drive shafts - In conclusion, it is apparent that variations and/ or modifications can be made to the device according to this invention, without exceeding the scope of protection of the same.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86830154T ATE56055T1 (en) | 1986-01-21 | 1986-06-06 | SELECTION MECHANISM FOR NEEDLES AND PICKS ON EMBROIDERY MACHINES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1912986 | 1986-01-21 | ||
IT19129/86A IT1188284B (en) | 1986-01-21 | 1986-01-21 | DEVICE FOR ACTIVATING AND DEACTIVATING NEEDLE-HOLDER BARS AND PERFORATOR-HOLDER BARS ACCORDING TO A PRESETABLE PROGRAM, PARTICULARLY IN A SHUTTLE EMBROIDERY MACHINE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0230211A2 EP0230211A2 (en) | 1987-07-29 |
EP0230211A3 EP0230211A3 (en) | 1988-01-13 |
EP0230211B1 true EP0230211B1 (en) | 1990-08-29 |
Family
ID=11155046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86830154A Expired - Lifetime EP0230211B1 (en) | 1986-01-21 | 1986-06-06 | Enabling and disabling device for the needle-carrier rods and piercer-carrier rods according to a presettable program, in particular for a shuttle embroidery machine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0230211B1 (en) |
AT (1) | ATE56055T1 (en) |
DE (1) | DE3673798D1 (en) |
IT (1) | IT1188284B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1226235B (en) * | 1988-07-08 | 1990-12-27 | Comerio Ercole Spa | DEVICE FOR ACTIVATING AND DEACTIVATING A PERFORATOR IN AN EMBROIDERY, QUILTING MACHINE OR SIMILAR EQUIPMENT PROVIDED WITH AN ARTICULATED ATTACHMENT OF THE PERFORATOR. |
DE9108861U1 (en) * | 1991-07-18 | 1991-09-19 | Zsk Stickmaschinen Gmbh, 4150 Krefeld | Embroidery head for embroidery machines |
IT1251850B (en) * | 1991-09-23 | 1995-05-26 | Comerio Ercole Spa | DEVICE FOR COUPLING AND DISCONNECTION OF NEEDLE BARS AND PERFORATOR BARS IN AN EMBROIDERY MACHINE |
CN114469282B (en) * | 2022-03-31 | 2022-07-01 | 真健康(北京)医疗科技有限公司 | Orthogonal structure five-degree-of-freedom puncture robot |
Family Cites Families (4)
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 (en) * | 1976-07-28 | 1983-06-25 | Comerio Ercole Spa | REFERENCES RELATED TO A PLAUEN TYPE EMBROIDERY MACHINE OR SIMILAR |
DE3047928A1 (en) * | 1980-12-19 | 1982-07-01 | Maschinenfabrik Carl Zangs Ag, 4150 Krefeld | EMBROIDERY MACHINE |
CH651333A5 (en) * | 1981-02-04 | 1985-09-13 | Saurer Ag Adolph | CONTROL DEVICE FOR A MECHANICAL SHIFT LEVER ARRANGEMENT ON AN EMBROIDERY MACHINE. |
-
1986
- 1986-01-21 IT IT19129/86A patent/IT1188284B/en active
- 1986-06-06 AT AT86830154T patent/ATE56055T1/en not_active IP Right Cessation
- 1986-06-06 DE DE8686830154T patent/DE3673798D1/en not_active Expired - Fee Related
- 1986-06-06 EP EP86830154A patent/EP0230211B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0230211A2 (en) | 1987-07-29 |
IT1188284B (en) | 1988-01-07 |
DE3673798D1 (en) | 1990-10-04 |
EP0230211A3 (en) | 1988-01-13 |
ATE56055T1 (en) | 1990-09-15 |
IT8619129A0 (en) | 1986-01-21 |
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