PNEUMATIC ACTION ACCESSORY HOLDER SPECIFICALLY FOR SEWING MACHINES

Abstract: An accessory pneumatically operated holding device, specifically for industrial sewing machines which device comprises a profiled blade accessory holding element (5) which can be moved by a pneumatic piston (19) along a backward and forward travel with extreme and adjustable precision. The above device can be readily removed from the working plane of the sewing machine.

Description: PNEUMATIC ACTION ACCESSORY HOLDER SPECIFICALLY FOR SEWING MACHINES The present invention relates to an accessory carrying device pneumatically operated for industrial sewing machines. Particularly this invention relates to a device as above comprising :a base which can be separated into three plates suitably arranged for adapting and anchoring the device on the working plane _. ;a gaseous fluid distributor by which a double acting cylinder is fad and also supported ; means for controlling and adjusting the limit stop of an accessory holder and said accessory holder,said elements being assembled in various configura¬ tions to adapt this device to the different sewing machines of the industry. As known up to now accessories were used such cloth bordering hemming and guiding and the like mounted in fixed positions on the sewing machines with consequent time wasting for the replacement and the removal of an accessory from the working plane.Furthermore a device has not been realized whereby in addition to handle,i.e. to move back and forth the accessories with respect to the working position, as required for making garments speci¬ fically sewing machines,it could also be adapted to all industrial sewing machines of the trade. The object of the present invention responds to the requirement of avoiding long lasting handling and sustituting operations of accessories and accessory holding devices and to the purpose of providing a device adaptable with suitable adjustments to the sewing machines of the trade . Thus a specific object of the present invention is a pneumatically actuated accessory holding device specifically for industrial sewing machine wherein decom- posable metal milled blade base means are provided in combination which present a first seat for accessory holding slider,a second seat for adjustable limit means,a third seat for rapid release housing means and fourth seats for a fixing means of a distributor for a motor fluid and means for fixing on a working plane ;fluid regulating connector means being provided on said distrib¬ utor along with at least two ways for feeding a fluid;a double acting cylinder means being provided which include an adjustable moving rod means connected with an adjust- able transmission leg intended for actuating said access¬ ory holder sliding means. This invention will be better understood by the following description and the attached drawings in which a preferred embodiment thereof will be illustrated.In the drawings: Fig.l shows a top plan view of the device according to the invention wherein the working plane of a sewing machine is indicated by a point and dash line while the accessory of the sewing machine is indicated by a dashed line; Fig.2 shows a plane view from below of the device of Fig.l; Fig.3 shows a top plan view of the device of this invention where the double acting cylinder rod is shown in retracted position; Fig.4 shows a side view of the above device with the pneumatic operating fluid distributor; Fig.5 shows a side partially cross sectioned view from the side opposite to Fig.4 with the cylinder rod extended; Fig.6 shows a partially cross sectioned view of the distributor; Fig.7 shows some of the different working configurations of the device of this invention; Fig.8 shows an exploded view of the device of this invention. According to a preferred embodiment thereof the device of this invention comprises a rigid base formed by three milled plates 1,2,3 which can" be taken to pieces . Between the lower plate 1 and the upper plate 2 a sliding assembly is included which is formed by a sliding blade 6a, 6b packet between which a slider 5 is included. n extension blade 5a is included in blade 5 which is provided with at least two holes 5a' on wich the machine accessory is attached. The blade packet ,comprising blades 6a and 6b which serve for adjusting in height the position of slider 5,and the slider 5 are both attached to an upper counter plate 24' and a lower counter plate 24" which run along a slot 4 of which both plates 1 and 2 are provided. Counterplate 24' engages a small block 8a at the end of limit stop 8 ,which small block 8a provides the seat for the eventual assembly of the slide differen- ziated stop means (not shown) . The small block 8a is movable along a seat 7 of which both plates 1 and 2 are provided.Seat 7 is provided along the sides thereof with knurlings on which the small teeth of small block 8a mesh for a quick and reliable locking . On the plates 1 and 2 a series of seats 11 are provided for anchoring by means of screws a prismatic body 12 of a compressed air distributor and for the locking screws of eventual straps (not shown) which can be used in some instances for anchoring the device to sewing machines for industry. he shape of these straps or fixing means will suitably change according to the various circumstam- ces and for the locking of an end thereof , suitable seats 23 are provided for . The base assembly of this device comprises also a third removable plate 3 which can be attached to plate 1 by means of screw 3 '.Plate 3 is made for adapting the overall dimensions of said device with respect to the different sewing machines as shown in Fig.7. Actually the particular plate 3 permits the displacements of distributor 12 from configuration a to configuration f of Fig.7 that is the positions suitable for adapting the present device to the different industri¬ al sewing machines. On said base means three seats for threaded and lackable feet 13 are provided for adjusting the device of the invention in height on the working plane. Said fluid feeding distributor 12 comprises primary feed ways 14,a secondary 15 feed way, seats 11 for clamping screws,a seat 16 for a screw by which the device rotation is permitted;flow adjusting connectors 17 set in a normal position and in a supplementary position 18 in which they function also as double acting cylinder 19 support.Said cylinder 19 actuates a threaded rod 20 connec e w n a u a e eg w nsm s translation movement to the accessory holding 5. According to the preferred embodiment illus¬ trated in the drawings,the present invention intends to provide the solutions for permitting : a)-the perfectly good handleability of the accessories which are usually employed in. industrial sewing, machines; b)- the device mobility according to the invention without any need for totally dismounting ;and c)- any chance of adaptability of such device to the industrial sewing machines of the trade. The handleability of the accessories fastened to the slider is imparted to double acting cylinder 19 which when suitably controlled by the fluid distributor 12 can slide said slider 5 into the working position (next to the needle) or into a rest position (position of the cylinder rod retracted ) . The mobility of the device of this invention which mobility is made a requirement for not encumbering the working plane whenever the accessory does not serve, is given by the quick release 10 and by a back anchoring screw (not shown in the drawings) about which the device rotates.Said screw can be housed, for instance,in the seat 16 provided for in the distributor 12.In facts,the locking of this device to the sewing machine working plane is made by means of two pins secured onto the machine working plane,of which pin 27 has a round horizontal groove on which a looking and release system 10 engages,said system 10 being formed by a spring biassed knife which engages said groove and wich is released by depressing button 10 allowing the device rotation with respect to the machine working plane without any need,for totally dismantling it whenever it is to be removed from its working position. The adaptability of the object of this inven- tion to the sewing machines presently on trade is ensured by the particular configuration of the base components which are so realized that any lengthenings shortenings and symmetrical overturnings of the device components are feasible (see Fig.7) whereby beyond everythings else millimetric adjustments are allowed as follows: As already mentioned ,the blade packet compris¬ ing blades 6a and 6b and slider 5 are attached to an upper counter plate 24' and a lower counter plate 24". Counter plate 24' has a pin 24 which fits into one of a plurality of holes 25 which are distributed at constant distances along leg 22 with the purpose of compensating for any possible change of the distributor 12 position with respect to the device base in the different obtainable positions in such way that the stroke of the r od 20 of the cylinder 19 is the ampest possible. Leg 22 is bent upwards to form an arm 22 ' of which the upper end has a hole 21' aligned with a rod 20 of the pneumatic double acting cylinder or jack 19 which is fastened onto the prismatic body 12 of a compressed air distributor which extends parallel to said cylinder 19. A further finer adjustment can be obtained as follows : Into hole 21' extends the threaded end of cylinder rod 20 while a threaded locking ring 21 is inserted for adjusting the distance between leg 22' and cylinder 19. Therefore the threaded locking ring 21 allows finer adjustment of the cylinder rod stroke ,smaller than the pitch of holes 25. It has to be further noted how the possibility of distributor 12 to be fixed in different positions parallel to the cylinder stroke permits to adapt the accessory mounted on the accessory holder profiled plate 5a in an optimal manner with respect to the needle on the different sewing machines whom the device is assembled to. The present invention has been described with specific reference to an embodiment thereof but it is to be understood that variations and modifications can be added by those skilled in the art without escaping from the related scope of protection by the present industrial patent.

Claims: CLAIMS 1) A pneumatic action accessory holding devi¬ ceparticularly for industrial sewing machines,character¬ ized by the fact of comprising: a slider (5) provided with an accessory holder profiled plate (5a) firmly connected to a leg (22) which can be registered along its movement and is controlled by a rod (20) of a pneumatic double acting cylinder (19) which operates by a motor fluid,said accessory holding slide (5) being movable along a sliding seat (4) provided among base plates (1,2) on which said pneumatic cylinder (19) is mounted along with a distributor (12) for feeding the motor fluid to said pneumatic cylinder,means (7,8) for adjusting the limit stop of said accessory holder and means (11) for anchoring said distributor (12) on said base plates in different position;the position of said ' base on an industrial sewing machine being established directly or through suitable fixing means for which suitable seats (23) are previded,the position of said base being dependent on the different machines. 2) A pneumatic action accessory holding devi¬ ce,particularly for industrial sewing machines according to claim 1 characterized by the fact that the base plate of said device can be separated into at least three elements which substantially comprise two shaped plates (1,2) mechanically coupled therebetween and a third plate (3) which can be removed for reducing the total lenght of said base,such removal being made for adapting the overall dimensions of said device to the different sewing machines . particularly for industrial sewing machines according to claim 1 characterized by the fact that the holes (11) on distributor (12) lower base (1) are so disposed that they ensure the anchoring of the same distributor (12) on the bases (1,2,3) also in a projecting position which allows to change the stroke of the pneumatic cylinder (19) rod. 4) A pneumatic action accessory holding device particularly for industrial sewing machines according to claim 1 characterized by the fact that the leg (22) attachment on the accessory holding slide (5) is made by a pin (24) to be fitted into one of many holes (25) provided along said leg (22) with the purpose of compensating for possible position changes of the distributor (12) with respect to the base (1,2) in the different obtainable positions in such a way that the cylinder rod stroke is the amplest possible, a further finer adjustment of said hole steps being obtainable by acting on the pneumatic cylinder (19) rod (20) thread which engages threaded hole of the leg (22) hole (21') whereon it is locked by means of a locking ring (21). 5) A pneumatic action accessory holding device particularly for industrial sewing machines according to claim 1 characterized by the fact that said distributor (12) in addition to displaying a stiffening and supporting mechanic action for the pneumatic cylinder (19),shows three independent distributing channels through two (14) of which pneumatic signals can be derived in parallel with either the forward or the backward travel of the cylinder (19) which is independently forward and backward operable while in the third channel (15) signals can indifferently be sent or/and taken from ways (14) or from exterior lines in such a way that pneumatic signals can be obtained for the different uses. 6) A pneumatic action accessory holding device particularly for industrial sewing machines as claimed in claim 1 characterized by the fact that the sliding and anchoring seats provided in plates (1,2,3) and the symmetrical disposal of the fixing screw seats on the pneumatic cylinder (19) distributor (12) permit the device components disposal in such configuration that said device can operate in specular symmetry parallel to the needle transverse to the sewing means fitting direction. 7) A pneumatic action accessory holder,particular¬ ly for industrial sewing machines according to claim 1 characterized by the fact that its anchoring on the working plane can be obtained through a single pair of vertical pins and/or screws perpendicular to the base (1,2) of which one comprises a hinge axis while the other (27) has a groove on which a hocking and release quick system (10) engages with the purpose of allowing the device rotation with respect to the working without any need for totally dismounting it whenever it is to be removed from the working position. 8) A pneumatic action accessory holder,particular- ly for industrial sewing machines according to claim 1 characterized by the fact that the feeding of the motor fluid to the distributor takes place through at least two ways on each of which a flow control (17,18) is provided ;the fluid connectors and/or flow regulators (18) being adapted for supporting the pneumatic cylinder and feeding the same . holders,particularly for industrial sewing machines ac¬ cording to claims 1 and 2 characterized by the fact of comprising on its base at least the seats (13) for three independent height adjustment feet with the purpose of changing the position of said device with respect to the working plane,the position of the accessory holding plate (5a) being further adjustable for height within its sliding (4) seat by suitably inserting the blades (6) among which it is housed. 10) A device for pneumatically operated accessory holders,particularly for industrial sewing machines ac¬ cording to claim 1 characterized by the fact that a small block (8a) of the end of stroke (8) provides the seat for the slide differenziated stop means and for anchoring fabric guide means in order to keep its alignment with respect to the pressing foot.

Inventors: ROMANO ANTONINO, ROMANO, ANTONINO
Applicants: PROFEEL SRL
Application year: 1985
Main classification: D05B75
IPC codes: D05B35, D05B75, F15B15