US3759200A - Apparatus for producing stitching patterns with adjustable workclamp apertures - Google Patents

Apparatus for producing stitching patterns with adjustable workclamp apertures Download PDF

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Publication number
US3759200A
US3759200A US00254245A US3759200DA US3759200A US 3759200 A US3759200 A US 3759200A US 00254245 A US00254245 A US 00254245A US 3759200D A US3759200D A US 3759200DA US 3759200 A US3759200 A US 3759200A
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US
United States
Prior art keywords
clamp
workpiece
clamping means
clamping
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00254245A
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English (en)
Inventor
N Marforio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Virginio Rimoldi and Co SpA
Original Assignee
Virginio Rimoldi and Co SpA
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Filing date
Publication date
Application filed by Virginio Rimoldi and Co SpA filed Critical Virginio Rimoldi and Co SpA
Application granted granted Critical
Publication of US3759200A publication Critical patent/US3759200A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B21/00—Sewing machines with devices for automatically controlling movement of work-carrier relative to stitch-forming mechanism in order to obtain particular configuration of seam, e.g. programme-controlled for sewing collars, for attaching pockets
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B39/00—Workpiece carriers
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices

Definitions

  • the present invention relates to an apparatus for producing stitching patterns in fabric by means of an adjustable workclamp device adapted to move said fabric along a work supporting surface and through a sewing area for performing the stitching function.
  • such apparatuses at the end of the seaming cycle, include automatic means for opening the workclamp so as to allow the release of the workpiece from the clamp.
  • the return movement of the clamp to the starting station occursautomatically and in an opened position in order to avoid interference of the clamp with the fixed elements of the apparatus, for example, the sewing machine, as well as to reduce the delay which would occur if the clamp had to be opened in the charging station.
  • the clamp opening of aperture for the insertion of the workpiece as well as to avoid an interference with the fixed elements.
  • the aperture of the clamp As to the latter purpose it is necessary to have the aperture of the clamp as large as possible, while as to the charging or clamping of the workpiece it is preferable to have the aperture of the clamp of a size to ad equately clamp the particular thickness of the workpiece to be sewn. Moreover it should be rembered that, once'the workpiece is inserted and the clamp closed a slight re-locating of the said workpiece is often required necessitating re-opening of the clamp and the subsequent re-closing thereof.
  • the width of the'aperture is always the same; however it would be sufficient and preferable, in the case of a required slight re-locating of the workpiece, for the size of the aperture to be substantially less than the fully opened aperture,,which is necessary during return of the clamp to its initial position to avoid the aforementioned interferences.
  • the size of the aperture is substantially less than the fully opened aperture, which is necessary during return of the clamp to its initial position to avoid the aforementioned interferences.
  • the present invention provides an apparatus for producing stitching patterns, in which the aperture of the work-clamp is adjustable which has overcome the above mentioned problems.
  • the clamp aperture is automatic and at the end of the seaming cycle to free workpieces even of a complicated kind and permits the clamp to return to its initial position without interference with the fixed elements of the sewing machine.
  • suitable manual controls make it possible to close the clamp on the next workpiece and to re-open it only slightly if location adjustment is required of the workpiece.
  • the clamp When only a slight amount of repositioning of simple or small-sized workpieces is required, the clamp is opened only a sufficient amount to perform this function, thereby, reducing the time delay ordinarily required to open the clamp fully. This feature is especially advantageous when this operation is to be repeated many times, and also avoids a power waste.
  • Another advantage is that the mentioned repositioning of the workpiece is extremely facilitated, because it is easier to sight the proper position of the workpiece through the edge of the clamp taken as a reference line, in the case of partial openings rather than when the clamp is completely opened.
  • the apparatus for producing stitching patterns automatically according to the present invention includes a clamp for moving a workpiece along a sewing path on a work supporting surface with control means for controlling the width of the aperture of said clamp. It is characterized by the fact that it also includes control means suitable to automatically control the said opening so that the clamp will open fully at the end of the seaming cycle.
  • FIG. 1 is a prospective view of a preferred embodiment of the apparatus according to the present invention.
  • FIG. 2' shows a section view along the line II-II of the FIG. 1;
  • FIG. 3 is a view inside elevation of a portion of the device in FIG. 2 illustrating the supporting parts of the clamp in a position which provides a partial opening of the clamp;
  • FIG. 4 is a view similar to FIG. 2 showing the same particular as in FIG. 3 in a position to provide a greater width opening of the clamp,
  • FIG. 5 shows a fragmentary view of the particular in FIGS. 3 and .4 in a position showing a means for obtaining a larger width opening of the clamp than that shown in FIG. 4.
  • the apparatus for producing stitching patterns with adjustable workclamp aperture is usually formed by a supporting frame 1 fitted above with a work supporting surface 2 on which a carriage 3 is slidable by a driving means 4.
  • the driving means includes an electric motor 5, a driving chain 6 and a coupling means 7 connecting the carriage 3 to one or the other branch of the chain -6.
  • a fixed sewing machine 8 formed by a sewing head, disposed so as to sew along the edge of a workpiece (not shown) moved by a plate member or clamp 9 fixed to the carriage 3.
  • the clamp during the working cycle moves from a starting station or charging station, where it is shown in FIG. 1, to a position beyond the sewing machine 8. During this movement the clamp moves the workpiece through a seaming area formed by a conventional needle 10 of the sewing machine.
  • the clamp 9 must be pivoted to a position above the work supporting surface 2 to allow the insertion and respectively the taking away of the workpiece.
  • the opening or upward movement of the clamp is effected by pneumatic means 11 which pivots the clamp 9 and its supporting frame or driving means 12 to the proper location for the transversal movements on a cylinderlike guide rod 13 which represents the sliding rail of the carriage 3.
  • This carriage as shown in FIGS. 3-5 also includes a tubular support 3a which, besides being movable along the rail; 13 as part of the carriage 3, it is adapted to pivot on said rail, to which it is attached.
  • the driving means 12 includes a pair of the tube members 14 fixed to the tubular support 3a of the carriage 3 and a pair of rods 15 which are telescopically mounted in the tubes 14.
  • each rod 15 there is mounted the clamp 9 which includes a plate whose outer edge facing the needle 10 reproduces the contour of the seam to be formed in the workpiece.
  • the distance of this outer edge from the needle 10 is maintained by a guide means 16 disposed so as to be engaged by a fixed locator 17, to form the seam only along the exposed free edge of the workpiece.
  • the initial aligning of the guiding means 16 with the locator 17 is assured by a pneumatic member 18 which as shown in FIG. 1 has one end attached to the clamp 9 and its opposite end to the carriage 3.
  • the locating alignment of the clamp 9 by the pneumatic member 18 is discontinued when its front edge makes contact with a first control element 19 carried on the work supporting surface 2 adjacent the sewing machine 8.
  • Control element 19 when contacted by clamp 9 is effective in stopping the fiow of compressed air to the pneumatic member 18 and continued movement of the clamp is guided by the engagement of the guide means 16 with the fixed locator l7.
  • Ater clamp 9 has moved the workpiece through the seaming area, its trailing edge acts upon a control valve element 20 (FIG. 1), disposed in series with the first control element 19, to again bring said clamp under the influence of the pneumatic member 18.
  • control valve 20 In addition to again bringing clamp 9 under the influence of the pneumatic member 18, the control valve 20 also activates a pneumatic member 11, which is effective in tilting the tubular support 3a upwardly and lift the clamp 9 to its fully open position.
  • a pneumatic control switch 29 which is, disposed so as to be actuated by a mobile part of the carriage 3 to effect a complete opening of clamp 9 and the return of the latter to its initial or charging position by means of the movement of the coupling 7 on the branch of the chain 6 opposite to that on which it was first engaged during the movement thereof.
  • FIG. 5 shows the maximum aperture of the clamp 9 which is obtained by means of the contemporary simultaneous input of air into both chambers 22 and 23, causing the piston 25 to descend in a downwardly direction within chamber 22 while piston 26 is caused to move upwardly within its respective chamber 23.
  • the intermediate aperture positions are selected by allowing the input of air into chamber 22 only or chamber 23 only which correspond to the positions 9a and 9b respectively of the clamp 9.
  • the pneumatic valve member 31, for actuating the control 30, can control a many-a-position distributing valve which can connect both chambers 22 and 23 with the atmosphere or can direct air into one of the said chambers leaving the other in connection with the atmosphere. It should be understood that when the maximum aperture of the clamp 9 is the one represented in FIG. 5, the position 9a of FIG. 2 is then an intermediate position of the said clamp 9.
  • control means for actuating said opening means to fully open said clamping means after moving the workpiece through the stitching area
  • clamping means comprises a pivotal plate member selectively movable to and from close proximity with the work supporting surface.
  • said means for driving said clamping means includes a supporting frame operatively connected to a driven chain 6.
  • said traversing means includes a guide rod on which said supporting frame is slidable and a control switch for reversing the direction of movement of said frame on said guide rod. 7
  • said means for varying the width of the opening of said clamping means includes a manually operable valve member connected to said pneumatic cylinders.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00254245A 1971-06-19 1972-05-17 Apparatus for producing stitching patterns with adjustable workclamp apertures Expired - Lifetime US3759200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2608171 1971-06-19

Publications (1)

Publication Number Publication Date
US3759200A true US3759200A (en) 1973-09-18

Family

ID=11218594

Family Applications (1)

Application Number Title Priority Date Filing Date
US00254245A Expired - Lifetime US3759200A (en) 1971-06-19 1972-05-17 Apparatus for producing stitching patterns with adjustable workclamp apertures

Country Status (5)

Country Link
US (1) US3759200A (de)
DE (1) DE2227273A1 (de)
ES (1) ES403213A1 (de)
FR (1) FR2139594A5 (de)
GB (1) GB1371667A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808992A (en) * 1972-02-01 1974-05-07 Pfaff Ind Masch Device for feeding the cloth in a sewing system for the production of open darts
US4066027A (en) * 1975-05-14 1978-01-03 Rockwell-Rimoldi S.P.A. Workpiece feeder device for the traveling gripper of a sewing unit
US4512269A (en) * 1983-07-19 1985-04-23 The Charles Stark Draper Laboratory, Inc. Automated assembly system for seamed articles
US4878445A (en) * 1988-03-02 1989-11-07 Union Special Corporation Hemmer seamer assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2086259A (en) * 1935-03-04 1937-07-06 American Laundry Mach Co Press operating mechanism and control
US2393503A (en) * 1944-02-24 1946-01-22 Firestone Tire & Rubber Co Multiple pressure responsive device
US2483239A (en) * 1945-10-10 1949-09-27 John C Sharpe Multiple pressure fluid motor mechanism for pushing and pulling
US2939414A (en) * 1956-10-26 1960-06-07 Trubenised Great Britain Ltd Sewing machines
US3329109A (en) * 1964-10-05 1967-07-04 Res & Dev Co Inc Automatic program-controlled sewing machines
US3517630A (en) * 1967-07-26 1970-06-30 Clarkson Ltd W J Stitching of materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2086259A (en) * 1935-03-04 1937-07-06 American Laundry Mach Co Press operating mechanism and control
US2393503A (en) * 1944-02-24 1946-01-22 Firestone Tire & Rubber Co Multiple pressure responsive device
US2483239A (en) * 1945-10-10 1949-09-27 John C Sharpe Multiple pressure fluid motor mechanism for pushing and pulling
US2939414A (en) * 1956-10-26 1960-06-07 Trubenised Great Britain Ltd Sewing machines
US3329109A (en) * 1964-10-05 1967-07-04 Res & Dev Co Inc Automatic program-controlled sewing machines
US3517630A (en) * 1967-07-26 1970-06-30 Clarkson Ltd W J Stitching of materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808992A (en) * 1972-02-01 1974-05-07 Pfaff Ind Masch Device for feeding the cloth in a sewing system for the production of open darts
US4066027A (en) * 1975-05-14 1978-01-03 Rockwell-Rimoldi S.P.A. Workpiece feeder device for the traveling gripper of a sewing unit
US4512269A (en) * 1983-07-19 1985-04-23 The Charles Stark Draper Laboratory, Inc. Automated assembly system for seamed articles
US4878445A (en) * 1988-03-02 1989-11-07 Union Special Corporation Hemmer seamer assembly

Also Published As

Publication number Publication date
ES403213A1 (es) 1975-05-01
GB1371667A (en) 1974-10-23
DE2227273A1 (de) 1972-12-21
FR2139594A5 (de) 1973-01-05

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