EP1136610B1 - Quilting machine with variable-spacing stitchers - Google Patents
Quilting machine with variable-spacing stitchers Download PDFInfo
- Publication number
- EP1136610B1 EP1136610B1 EP20000104573 EP00104573A EP1136610B1 EP 1136610 B1 EP1136610 B1 EP 1136610B1 EP 20000104573 EP20000104573 EP 20000104573 EP 00104573 A EP00104573 A EP 00104573A EP 1136610 B1 EP1136610 B1 EP 1136610B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carriages
- stitcher
- hook assembly
- quilting machine
- sewing heads
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B11/00—Machines for sewing quilts or mattresses
Definitions
- the present invention relates to a quilting machine with variable-spacing stitchers.
- a quilting machine comprises a cloth supporting carriage and a plurality of stitchers which quilt the cloth according to a preset pattern.
- the cloth supporting carriage and the stitchers perform relative movements which allow the sewing needle to move on the cloth with two degrees of freedom in order to form a line of stitches that follows the intended path.
- the stitchers are mounted on a frame which comprises a first beam which lies above the cloth and a second beam which is parallel to the first beam and lies below the cloth.
- the first beam supports a guide for the sewing head of the stitcher, while the second beam supports a guide for the so-called hook assembly.
- EP-A-0 931867 discloses a quilting machine with a pair of mutually spaced stitchers (12a,12b) supported by respective carriages each actuated individually by their own linear motor controlled by a computerized numeric control.
- US-A-5 287 820 discloses a sewing machine with a pair of stitchers mutually spaced from each other by a selectable predetermined distance and supported on a common drive mechanism which simultaneously moves the pair of stitchers together.
- the aim of the present invention is therefore to provide a quilting machine without suffering the conventional drawbacks, i.e., which comprises a plurality of stitchers which can be actuated so that they operate independently of each other in order to trace converging and diverging lines of stitches.
- the reference numeral 1 designates a frame of a quilting machine, which is composed of two horizontal beams 2 and 3 which are mutually superimposed and are connected, at their opposite ends, by two respective vertical uprights 4 and 5.
- the beams 2 and 3 and the uprights 4 and 5 enclose an opening 6 through which a cloth 7 to be quilted is fed.
- the cloth 7 is stretched horizontally on a frame (not shown) which is movable in a longitudinal direction A at right angles to the frame 1.
- Two mutually parallel cylindrical bars 8 and 9 are fixed to the ends of the upper beam 2 and are spaced from the beam.
- the bars 8 and 9 form a guide along which carriages 10 and 11 are slideable along a transverse path B which is perpendicular to the path A; such carriages support sewing heads 12 and 13 of two stitchers, generally designated by the reference numerals 14 and 15.
- the sliding of each carriage on the bars 8 and 9 is performed by two pairs of free rollers, the upper ones being designated by the reference numeral 16 and the lower ones being designated by the reference numeral 17.
- the rollers 16 and 17 are provided with a groove along their peripheral region and tangentially engage above and below the bars 8 and 9.
- the stitchers 14 and 15 comprise hook assemblies 18 and 19 which are actuated synchronously with the respective sewing heads 12 and 13.
- the hook assemblies are mounted on carriages 20 and 21 which, thanks to upper slotted wheel pairs 22 and lower slotted wheel pairs 23, are slideable on two bars 24 and 25 which are fixed, by means of their opposite ends, to the lower beam 3, parallel to the upper parts 8 and 9.
- the stitchers 14 and 15 are moved along the transverse path B above the cloth 7 by mechanically connecting the carriages 10 and 20 of the stitcher 14 to the respective carriages 11 and 21 of the stitcher 15 and synchronously actuating such carriages.
- the carriages 11 and 21 are actuated by means of a flexible and inextensible belt 26, made for example of steel, whose ends are fixed to two L-shaped elements 27 and 28, the L-shaped element 27 being rigidly fixed to the carriage 11.
- the other L-shaped element 28 is provided with a threaded stem 29 which protrudes toward the L-shaped element 27 and is guided through two brackets 30 and 31 which are fixed to the carriage 21.
- a nut 32 with a respective lock nut are screwed onto the end of the stem 29 that protrudes beyond the bracket 30, so as to provide a screw-type expander which tensions the belt 7 by acting on the L-shaped element 28.
- the belt 7 is wound in a closed loop around four guiding pulleys 33, 34, 35 and 36 and a driving pulley 37.
- the guiding pulleys 33-36 are arranged at the corners of an imaginary rectangle at the opposite ends of the beams 2 and 3.
- the driving pulley 37 is supported on the upright 3 between the pulleys 34 and 36, so that the belt 26 runs along a zigzag path with four parallel, superimposed and co-planar portions 38, 39, 40, 41, the portions 38 and 40 thereof moving in the same direction, which is opposite to the direction of the portions 39 and 41.
- the carriage 21 of the stitcher 15 is fixed to the portion 40 by a clamp 42, so that the two carriages 11 and 21 move correspondingly in the direction of actuation of the belt 26.
- the pulley 37 is provided with a ring gear 43 with which there meshes a pinion 44 of an electric motor 45 which is mounted on a bracket (not shown) which cantilevers out from the frame 1.
- Motion is transmitted from the stitcher 15 to the stitcher 14 by two reversible electric motors 46 and 47 which are mounted on the carriages 11 and 21 and whose shafts are constituted by threaded rods 48 and 49 having the same pitch, extending between the portions 38, 39 and 40, 41 of the belt 26, and being parallel to the bars 8, 9 and 24, 25.
- the threaded rods are engaged in female threads 50, 51 which are fixed to the carriages 10, 20 of the stitcher 14.
- the motors 46, 47 are controlled so as to move with the same angular speed in the same direction.
- the stitchers 14 and 15 can be moved mutually closer or further apart during their relative movement with respect to the cloth and can form two lines of stitches which follow any convergent or divergent path with respect to each other.
- the materials employed, as well as the dimensions, may be any according to requirements and the state of the art.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Description
- The present invention relates to a quilting machine with variable-spacing stitchers.
- It is known that a quilting machine comprises a cloth supporting carriage and a plurality of stitchers which quilt the cloth according to a preset pattern.
- In quilting machines, the cloth supporting carriage and the stitchers perform relative movements which allow the sewing needle to move on the cloth with two degrees of freedom in order to form a line of stitches that follows the intended path.
- In quilting machines, the stitchers are mounted on a frame which comprises a first beam which lies above the cloth and a second beam which is parallel to the first beam and lies below the cloth.
- The first beam supports a guide for the sewing head of the stitcher, while the second beam supports a guide for the so-called hook assembly.
- In order to allow the sewing needle to act in cooperation with the hook assembly, mechanical transmissions and/or electrical connections are provided so that the sewing needle moves in step, and in perfect vertical alignment, with the hook assembly during its movements over the cloth.
- Conventional quilting machines have operating limitations when it is necessary to manage a plurality of stitchers operating independently of each other so that each one follows an individual path. Because of these difficulties, the stitchers are mostly rigidly connected to each other and can follow only parallel paths.
- EP-A-0 931867 discloses a quilting machine with a pair of mutually spaced stitchers (12a,12b) supported by respective carriages each actuated individually by their own linear motor controlled by a computerized numeric control.
- US-A-5 287 820 discloses a sewing machine with a pair of stitchers mutually spaced from each other by a selectable predetermined distance and supported on a common drive mechanism which simultaneously moves the pair of stitchers together.
- The aim of the present invention is therefore to provide a quilting machine without suffering the conventional drawbacks, i.e., which comprises a plurality of stitchers which can be actuated so that they operate independently of each other in order to trace converging and diverging lines of stitches.
- In accordance with the invention, there is provided a quilting machine as defined in the appended claims.
- Further characteristics and advantages of the present invention will become apparent from the description that follows of a preferred embodiment, illustrated only by way of non-limitative example in the accompanying drawing, wherein the only figure is a perspective view of a supporting frame for two stitchers of a quilting machine.
- With reference to the above figure, the reference numeral 1 designates a frame of a quilting machine, which is composed of two
horizontal beams vertical uprights 4 and 5. - The
beams uprights 4 and 5 enclose an opening 6 through which a cloth 7 to be quilted is fed. For the sake of clarity in presentation, it is assumed that the cloth 7 is stretched horizontally on a frame (not shown) which is movable in a longitudinal direction A at right angles to the frame 1. - Two mutually parallel
cylindrical bars 8 and 9 are fixed to the ends of theupper beam 2 and are spaced from the beam. Thebars 8 and 9 form a guide along which carriages 10 and 11 are slideable along a transverse path B which is perpendicular to the path A; such carriages supportsewing heads 12 and 13 of two stitchers, generally designated by thereference numerals bars 8 and 9 is performed by two pairs of free rollers, the upper ones being designated by thereference numeral 16 and the lower ones being designated by thereference numeral 17. Therollers bars 8 and 9. - The
stitchers hook assemblies 18 and 19 which are actuated synchronously with therespective sewing heads 12 and 13. The hook assemblies are mounted oncarriages 20 and 21 which, thanks to upperslotted wheel pairs 22 and lowerslotted wheel pairs 23, are slideable on twobars lower beam 3, parallel to theupper parts 8 and 9. - The
stitchers carriages 10 and 20 of thestitcher 14 to the respective carriages 11 and 21 of thestitcher 15 and synchronously actuating such carriages. - The carriages 11 and 21 are actuated by means of a flexible and inextensible belt 26, made for example of steel, whose ends are fixed to two L-
shaped elements shaped element 27 being rigidly fixed to the carriage 11. The other L-shaped element 28 is provided with a threadedstem 29 which protrudes toward the L-shaped element 27 and is guided through twobrackets - A
nut 32 with a respective lock nut are screwed onto the end of thestem 29 that protrudes beyond thebracket 30, so as to provide a screw-type expander which tensions the belt 7 by acting on the L-shaped element 28. - The belt 7 is wound in a closed loop around four guiding
pulleys driving pulley 37. The guiding pulleys 33-36 are arranged at the corners of an imaginary rectangle at the opposite ends of thebeams pulley 37 is supported on the upright 3 between thepulleys co-planar portions portions 38 and 40 thereof moving in the same direction, which is opposite to the direction of theportions - The carriage 21 of the
stitcher 15 is fixed to theportion 40 by aclamp 42, so that the two carriages 11 and 21 move correspondingly in the direction of actuation of the belt 26. - For the actuation of the belt 26, the
pulley 37 is provided with aring gear 43 with which there meshes apinion 44 of anelectric motor 45 which is mounted on a bracket (not shown) which cantilevers out from the frame 1. - Motion is transmitted from the
stitcher 15 to thestitcher 14 by two reversibleelectric motors rods portions bars - The threaded rods are engaged in
female threads carriages 10, 20 of thestitcher 14. Themotors - The operation of the quilting machine is evident from the above description. When the
motors motor 45 allows to move thequilting machine 15 in one direction or the other along the transverse path B and therefore to also move in the same direction, by means of therods quilting machine 14, so as to provide two parallel lines of stitches on the cloth 7. - However, by actuating the
motors carriages 10, 20 of thestitcher 14 towards or away from the corresponding carriages 11 and 21 of thestitcher 15, keeping the sewing head 12 in perfect vertical alignment with therespective hook assembly 18. Accordingly, thestitchers - In the practical embodiment of the quilting machine, numerous modifications and variations are possible within the scope of the same inventive concept. For example, it is possible to install a third stitcher on the
guides stitcher 14 by providing on the carriages 11, 21 of thestitcher 15 two additional motors which drive two threaded rods engaging, with a threaded coupling, respective female threads which are fixed on the carriages of the third stitcher. Advantageously, the female thread is of the ballscrew type. Another embodiment uses, instead of the threadedrods carriages 10 and 20 and mesh with pinions which are keyed on the output shafts of themotors - All the details may furthermore be replaced with other technically equivalent elements.
- In practice, the materials employed, as well as the dimensions, may be any according to requirements and the state of the art.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (9)
- A quilting machine which comprises a frame (1) composed of a first beam (2) arranged horizontally above a cloth (7) to be quilted and a second beam (3) arranged below said cloth (7), said beams (2,3) being provided with respective guides (8,9;24,25) for carriages (10,11;20,21) for supporting sewing heads (12,13) and, respectively, a hook assembly (18,19) of at least two stitchers (14, 15), one (15) of which being provided with means for moving one of the sewing heads (13) and the hook assembly (19) synchronously and along a same path and with a same orientation, characterized in that the carriages (11,21) that support said one of the sewing heads (13) and the hook assembly (19) of a first stitcher (15) support respective motor elements (46,48,50;47,49,51) connected between the carriages (11,21) supporting the first stitcher (15) and the carriages (10,20) that support another one of the sewing heads (12) and the hook assembly (18) of the second stitcher (14) for synchronous movement of the carriages (10,20) supporting the second stitcher (14) towards or away from the corresponding carriages (11,21) supporting the first stitcher (15), and wherein when said motor elements are not moving the first and second stitchers move together.
- The quilting machine according to claim 1, characterized in that said motor elements comprise electric motors (46, 47) which are supported on the supporting carriages (11, 21) of said one of the sewing heads (13) and of the hook assembly (19) of said first stitcher (15) and are adapted to actuate respective threaded rods (48, 49) which are parallel and are rotatably engaged in female threads (50, 51) which are supported on the carriages (10, 20) that support said another one of the sewing heads (12) and the hook assembly (18) of the second stitcher (14).
- The quilting machine according to claim 1, characterized in that said motor elements comprise electric motors which are supported on the carriages (11, 21) that support said one of the sewing heads (13) and the hook assembly (19) of said first stitcher (15) and are adapted to actuate respective racks which are parallel and have an end which is fixed to the carriages (10, 20) that support said another one of the sewing heads (12) and the hook assembly (18) of said second stitcher (14).
- The quilting machine according to claim 2, characterized in that for the actuation of said first stitcher (15) there is a flexible and inextensible belt (26) which has a point (27) fixed to a carriage (11) of said first stitcher (15) and wound in a closed loop around four guiding pulleys (33, 34, 35, 36) and a driving pulley (37), said guiding pulleys (33, 34, 35, 36) being arranged on said frame (1) at the corners of an imaginary rectangle and said driving pulley (37) being arranged between two superimposed guiding pulleys (34, 36) so that said belt (26) winds along four parallel, co-planar and superimposed portions (38, 39, 40, 41) which move in a same direction in pairs, the carriages (11, 21) for supporting said one of the sewing heads (13) and, respectively, the hook assembly (19) of said first stitcher (15) being fixed to two (38, 40) of said portions which move in the same direction.
- The quilting machine according to claim 4, characterized in that two electric motors (46, 47) of the reversible type are mounted on said carriages (11, 21), their shafts comprising threaded rods (48, 49) which have the same pitch and are parallel to said portions (38, 39, 40, 41) of the belt (26) and are engaged in female threads (50, 51) which are fixed to the carriages (10, 20) that support said another one of the sewing heads (12) and the hook assembly (18) of said second stitcher (14), said electric motors (46, 47) being controlled so as to move said carriages (10, 20) with the same speed and in the same direction.
- The quilting machine according to claim 4, characterized in that two electric motors (46, 47) of the reversible type are mounted on said carriages (11, 21), their shafts being provided with pinions which mesh with racks which are parallel to said portions (38, 39, 40, 41) of the belt (26) and have ends which are fixed to the carriages (10, 20) that support said another one of the sewing heads (12) and the hook assembly (18) of said second stitcher (14), said electric motors (46, 47) being controlled so as to move said carriages (10, 20) with the same speed in the same direction.
- The quilting machine according to claim 5, characterized in that it comprises a third stitcher which is controlled by providing, on the carriages (11, 21) of said first stitcher (15), two additional motors for actuating two threaded rods which engage, with a screw coupling, respective female threads which are fixed to the carriages that support the sewing head and the ,hook assembly of said third stitcher.
- The quilting machine according to claim 2, characterized in that said female threads (50, 51) are of the ballscrew type.
- The quilting machine according to claim 4, characterized in that said driving pulley (37) is provided with a ring gear (43) with which the pinion (44) of an actuation motor (45) meshes.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000612476 DE60012476T2 (en) | 2000-03-14 | 2000-03-14 | Quilting machine with variable distances between the sewing heads |
EP20000104573 EP1136610B1 (en) | 2000-03-14 | 2000-03-14 | Quilting machine with variable-spacing stitchers |
ES00104573T ES2224937T3 (en) | 2000-03-14 | 2000-03-14 | PADDING MACHINE WITH VARIABLE SEPARATION STITCHES. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20000104573 EP1136610B1 (en) | 2000-03-14 | 2000-03-14 | Quilting machine with variable-spacing stitchers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1136610A1 EP1136610A1 (en) | 2001-09-26 |
EP1136610B1 true EP1136610B1 (en) | 2004-07-28 |
Family
ID=8168019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000104573 Expired - Lifetime EP1136610B1 (en) | 2000-03-14 | 2000-03-14 | Quilting machine with variable-spacing stitchers |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1136610B1 (en) |
DE (1) | DE60012476T2 (en) |
ES (1) | ES2224937T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104155913B (en) * | 2014-08-22 | 2017-01-18 | 苏州市正步机器制造有限公司 | Quilter double-shaft synchronization control method and system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3047693C2 (en) * | 1980-12-18 | 1985-05-02 | Texpa Arbter-Maschinenbau GmbH, 8741 Saal | Device for processing the two parallel edges of a material web |
US5287820A (en) * | 1991-05-02 | 1994-02-22 | Nahmaschinenfabrik Emil Stutznacker Gmbh & Co., Kg | Movable and relatively positionable sewing units for sewing stationary material |
IT1299819B1 (en) * | 1998-01-23 | 2000-04-04 | Resta Srl | QUILTING MACHINE WITH SEWING MACHINES MOVED BY LINEAR ELECTRIC MOTORS. |
-
2000
- 2000-03-14 EP EP20000104573 patent/EP1136610B1/en not_active Expired - Lifetime
- 2000-03-14 DE DE2000612476 patent/DE60012476T2/en not_active Expired - Lifetime
- 2000-03-14 ES ES00104573T patent/ES2224937T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE60012476D1 (en) | 2004-09-02 |
DE60012476T2 (en) | 2005-07-28 |
EP1136610A1 (en) | 2001-09-26 |
ES2224937T3 (en) | 2005-03-16 |
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