CA2374669A1 - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CA2374669A1 CA2374669A1 CA002374669A CA2374669A CA2374669A1 CA 2374669 A1 CA2374669 A1 CA 2374669A1 CA 002374669 A CA002374669 A CA 002374669A CA 2374669 A CA2374669 A CA 2374669A CA 2374669 A1 CA2374669 A1 CA 2374669A1
- Authority
- CA
- Canada
- Prior art keywords
- drive
- sewing machine
- knife
- guide rod
- arm
- 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.)
- Abandoned
Links
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
- D05B37/06—Cutting devices with oscillating tools
- D05B37/063—Cutting devices with oscillating tools in synchronism with the movement of the needle bar or the work-feeding means
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
- D05B37/06—Cutting devices with oscillating tools
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to a sewing machine comprising at least one needle (7) that can be driven up and down and a blade (12) mounted downstream of said needle and driven up and down in the direction of conveyance of the article to be sewn by means of a gear or eccentric drive mechanism (20), said blade making it possible to cut a slot in at least one part of the article to be sewn (14). The blade (12) is placed on a guide rod (10) that can be vertically moved in the arm (1) of the sewing machine. Displacement of the guide rod (10) and the blade (12) between a top non-cutting position and a lower cutting position is effected by a two-position linear drive (21) provided as coupling mechanism between the gear or eccentric drive mechanism (20) and the guide rod (10).
Description
Sewing Machine The invention relates to a sewing machine according to the preamble of claim 1.
In a sewing machine of the generic type known from DE 31 44 966 C I, the knife is actuated to reciprocate up and down by an articulated lever system of extraordinarily complicated design. For the knife to be moved into an upper non-cutting position and a lower cutting position, provision is made for a two-position linear drive in the form of a pneumatically actuated dou-ble-action piston-cylinder drive by means of which to pivot the entire lever system.
It is an object of the invention to embody a sewing machine of the generic type such that simple means will do for shifting the knife from the upper into the lower position and vice versa.
According to the invention, this object is attained by the features of the characterizing part of claim 1. The gist of the invention resides in that the two-position linear drive is the coupling mechanism working between the crank or eccentric drive and the guide rod that carries the knife. Conse-quently, the coupling mechanism can be prolonged or shortened.
Advantageous embodiments will become apparent from the sub-claims.
Details of the invention will become apparent from the ensuing description of an exemplary embodiment, taken in conjunction with the drawing, in which:
R/Sc - Dilrkopp Adler PCT1EP00104324 Fig. 1 is an illustration, partially broken away, of a partial lateral view of a sewing machine according to the invention in accordance with the arrow I of Fig. 2; and Fig. 2 is an illustration, broken open, of a partial frontal view of the sew ing machine in accordance with the arrow II of Fig. 1.
A two-needle sewing machine is outlined in the drawing, customarily hav-ing an upper arm 1, a lower base plate 2 of the type of a housing and a ver-tical standard 3 joining them. Conventionally, a needle bar 5 is mounted in the arm 1 for vertical displacement in a vertical needle bar guide 4; it is customarily drivable to reciprocate up and down by way of a crank (not shown) of an arm shaft (not shown) by means of a motor (not shown). On its lower end, the needle bar 5 has two needles 6, 7. In allocation to the needles 6, 7, a needle plate 8 is disposed on the upper side of the base plate 2, with a hook (not shown) disposed there-under.
Disposed in the arm 1 is a vertical knife guide 9, in which a vertical guide rod 10 is guided for vertical displacement, a knife 12 being mounted on its lower end by means of a joining piece 11. Allocated to the knife 12 is a counterpart knife 13 which is formed on the needle plate 8, for instance on the edge of a slit 14 which the knife 12 may reach through to submerge in the needle plate 8.
With reference to a workpiece conveying direction 14a seen in Fig. 2, the knife 12 is disposed downstream of the needles 6, 7. Seen in the conveying direction 14a, it is centered between the two needles 6, 7 as seen in Fig. 1.
In alignment with the needle plate 8, the sewing machine has a support plate 15 for workpieces that are to be sewn. These may be a first workpiece 16, for instance a jacket fore-part that is placed on the support plate 1 S. A
second workpiece 17, for example a piping strip, is placed thereon. A third workpiece 18, for example a flap, is again placed thereon unilaterally.
These three workpieces 16, 17, 18 are sewn together by means of the two-s needle sewing machine and simultaneously cut through by corresponding cutting actuation of the knife 12 in cooperation with the counterpart knife 13 for a slit (not shown) to form. With the exception of the guide rod 10, the two-needle sewing machine described so far has been familiar for in-stance from DE 42 23 966 C 1 (corresponding to U.S. patent 5 400 731 ), which reference is made to explicitly and which also teach the mentioned insert for sewing on a pocket flap and cutting a slit into the workpieces 16, 17, 18 that have been sewn together.
The cutting actuation of the knife 12, not familiar in this regard, by up and down motion of the knife 12 is effected by means of an electric knife driv-ing motor 19, which is mounted on the arm 1 and which, by means of a crank or eccentric drive mechanism 20, directly actuates an elongated feed drive 21 to substantially reciprocate up and down. The feed drive 21 is connected to the guide rod 10 by means of a joint 22 i.e., it constitutes a coupling mechanism between the drive mechanism 20 and the guide rod 10. In vicinity to the joint 22 i.e., at a distance from above the knife guide 9, the guide rod 10 is displaceably guided on a vertical guide rail 24 by means of a guide piece 23. By means of the guides 9 and 23, 24, the guide rod is safeguarded against deflections crosswise of its vertical direction of displacement and its longitudinal direction and against rotations about its longitudinal axis.
The feed drive 21 is a two-position linear drive. It is a pneumatically actu-ated double-action piston-cylinder drive, the housing 25 of which has a bearing 26, a so-called eye, in which is mounted the crank or eccentric pin 27 of the crank or eccentric drive mechanism 20. A piston 28, which is ac-tuated bilaterally, is disposed in the housing 25 for displacement in the lon-gitudinal direction of the feed drive 21; a piston rod 29 is mounted thereon, which is extended out, and sealed toward, the housing 25 on the side oppo-site the bearing 26. The piston rod 29 is connected with the joint 22 by its outer free end. In the vicinity of the two ends, compressed-air pipes 30 and 31 open into the housing 25, which are actuated by solenoid valves 32 and 33. The solenoid valves 32, 33 and the driving motor 19 are triggered by a joint control unit 34. Compressed-air supply takes place from a com-pressed-air source (not shown).
When the feed drive 21 is actuated by the compressed-air pipe 30 - which is the lower pipe in Fig. 2 - the piston rod 29 is in its position of retraction into the housing 25 seen in Fig. 2, in which the knife 12 is in an upper posi-tion - shown in solid lines in Fig. 2 - in which it cannot engage with the workpieces 16, 17 and 18 and in which it is positioned such that the opera-tor cannot be injured by the knife 12.
When however the compressed-air pipe 30 is relieved and the compressed-air pipe 31 is actuated, then the piston rod 29 is moved downwards out the housing 25, pushing the guide rod 10 with the knife 12 downwards into the cutting position shown by dot-dashed lines in Fig. 2. If the driving motor 19 is switched on simultaneously, the knife 12 will make an up and down cutting motion in the vicinity of the counterpart knife 13, cutting a slit into the three workpieces 16 to 18 that have been sewn together. Triggering the driving motor 19 and the feed drive 21 is designed in the control unit 34 and coupled with the sewing drive mechanism of the sewing machine in such a way that an up and down cutting motion by the driving motor 19 is performed only in the lower extended cutting position of the feed drive 21 and only when workpieces 16, 17, 18 are sewn simultaneously. When the knife 12 is moved into its upper non-cutting position, which is simultane-ously the position of rest, the workpieces 16 to 18 may be moved unim-S peded on the support plate 15.
In a sewing machine of the generic type known from DE 31 44 966 C I, the knife is actuated to reciprocate up and down by an articulated lever system of extraordinarily complicated design. For the knife to be moved into an upper non-cutting position and a lower cutting position, provision is made for a two-position linear drive in the form of a pneumatically actuated dou-ble-action piston-cylinder drive by means of which to pivot the entire lever system.
It is an object of the invention to embody a sewing machine of the generic type such that simple means will do for shifting the knife from the upper into the lower position and vice versa.
According to the invention, this object is attained by the features of the characterizing part of claim 1. The gist of the invention resides in that the two-position linear drive is the coupling mechanism working between the crank or eccentric drive and the guide rod that carries the knife. Conse-quently, the coupling mechanism can be prolonged or shortened.
Advantageous embodiments will become apparent from the sub-claims.
Details of the invention will become apparent from the ensuing description of an exemplary embodiment, taken in conjunction with the drawing, in which:
R/Sc - Dilrkopp Adler PCT1EP00104324 Fig. 1 is an illustration, partially broken away, of a partial lateral view of a sewing machine according to the invention in accordance with the arrow I of Fig. 2; and Fig. 2 is an illustration, broken open, of a partial frontal view of the sew ing machine in accordance with the arrow II of Fig. 1.
A two-needle sewing machine is outlined in the drawing, customarily hav-ing an upper arm 1, a lower base plate 2 of the type of a housing and a ver-tical standard 3 joining them. Conventionally, a needle bar 5 is mounted in the arm 1 for vertical displacement in a vertical needle bar guide 4; it is customarily drivable to reciprocate up and down by way of a crank (not shown) of an arm shaft (not shown) by means of a motor (not shown). On its lower end, the needle bar 5 has two needles 6, 7. In allocation to the needles 6, 7, a needle plate 8 is disposed on the upper side of the base plate 2, with a hook (not shown) disposed there-under.
Disposed in the arm 1 is a vertical knife guide 9, in which a vertical guide rod 10 is guided for vertical displacement, a knife 12 being mounted on its lower end by means of a joining piece 11. Allocated to the knife 12 is a counterpart knife 13 which is formed on the needle plate 8, for instance on the edge of a slit 14 which the knife 12 may reach through to submerge in the needle plate 8.
With reference to a workpiece conveying direction 14a seen in Fig. 2, the knife 12 is disposed downstream of the needles 6, 7. Seen in the conveying direction 14a, it is centered between the two needles 6, 7 as seen in Fig. 1.
In alignment with the needle plate 8, the sewing machine has a support plate 15 for workpieces that are to be sewn. These may be a first workpiece 16, for instance a jacket fore-part that is placed on the support plate 1 S. A
second workpiece 17, for example a piping strip, is placed thereon. A third workpiece 18, for example a flap, is again placed thereon unilaterally.
These three workpieces 16, 17, 18 are sewn together by means of the two-s needle sewing machine and simultaneously cut through by corresponding cutting actuation of the knife 12 in cooperation with the counterpart knife 13 for a slit (not shown) to form. With the exception of the guide rod 10, the two-needle sewing machine described so far has been familiar for in-stance from DE 42 23 966 C 1 (corresponding to U.S. patent 5 400 731 ), which reference is made to explicitly and which also teach the mentioned insert for sewing on a pocket flap and cutting a slit into the workpieces 16, 17, 18 that have been sewn together.
The cutting actuation of the knife 12, not familiar in this regard, by up and down motion of the knife 12 is effected by means of an electric knife driv-ing motor 19, which is mounted on the arm 1 and which, by means of a crank or eccentric drive mechanism 20, directly actuates an elongated feed drive 21 to substantially reciprocate up and down. The feed drive 21 is connected to the guide rod 10 by means of a joint 22 i.e., it constitutes a coupling mechanism between the drive mechanism 20 and the guide rod 10. In vicinity to the joint 22 i.e., at a distance from above the knife guide 9, the guide rod 10 is displaceably guided on a vertical guide rail 24 by means of a guide piece 23. By means of the guides 9 and 23, 24, the guide rod is safeguarded against deflections crosswise of its vertical direction of displacement and its longitudinal direction and against rotations about its longitudinal axis.
The feed drive 21 is a two-position linear drive. It is a pneumatically actu-ated double-action piston-cylinder drive, the housing 25 of which has a bearing 26, a so-called eye, in which is mounted the crank or eccentric pin 27 of the crank or eccentric drive mechanism 20. A piston 28, which is ac-tuated bilaterally, is disposed in the housing 25 for displacement in the lon-gitudinal direction of the feed drive 21; a piston rod 29 is mounted thereon, which is extended out, and sealed toward, the housing 25 on the side oppo-site the bearing 26. The piston rod 29 is connected with the joint 22 by its outer free end. In the vicinity of the two ends, compressed-air pipes 30 and 31 open into the housing 25, which are actuated by solenoid valves 32 and 33. The solenoid valves 32, 33 and the driving motor 19 are triggered by a joint control unit 34. Compressed-air supply takes place from a com-pressed-air source (not shown).
When the feed drive 21 is actuated by the compressed-air pipe 30 - which is the lower pipe in Fig. 2 - the piston rod 29 is in its position of retraction into the housing 25 seen in Fig. 2, in which the knife 12 is in an upper posi-tion - shown in solid lines in Fig. 2 - in which it cannot engage with the workpieces 16, 17 and 18 and in which it is positioned such that the opera-tor cannot be injured by the knife 12.
When however the compressed-air pipe 30 is relieved and the compressed-air pipe 31 is actuated, then the piston rod 29 is moved downwards out the housing 25, pushing the guide rod 10 with the knife 12 downwards into the cutting position shown by dot-dashed lines in Fig. 2. If the driving motor 19 is switched on simultaneously, the knife 12 will make an up and down cutting motion in the vicinity of the counterpart knife 13, cutting a slit into the three workpieces 16 to 18 that have been sewn together. Triggering the driving motor 19 and the feed drive 21 is designed in the control unit 34 and coupled with the sewing drive mechanism of the sewing machine in such a way that an up and down cutting motion by the driving motor 19 is performed only in the lower extended cutting position of the feed drive 21 and only when workpieces 16, 17, 18 are sewn simultaneously. When the knife 12 is moved into its upper non-cutting position, which is simultane-ously the position of rest, the workpieces 16 to 18 may be moved unim-S peded on the support plate 15.
Claims (6)
1. A sewing machine, comprising - an upper arm (1);
- a lower base plate (2);
- a standard (3) uniting the arm (1) and the base plate (2);
- a support plate (15), allocated to the base plate (2), for at least one workpiece (16, 17, 18);
- a needle bar (5), which is mounted in the arm (1) and movable up and down and which has at least one needle (6, 7);
- a knife (12), which is mounted on the arm (1) and movable up and down, for cutting a slit into the at least one workpiece (16, 17, 18);
- a crank or eccentric drive mechanism (20), which is coupled with the driving motor (19), for generation of an up an down cutting motion of the knife (12); and - a two-position linear drive (feed drive 21) for moving the knife (12) into a lower cutting position and an upper non-cutting position;
characterized in that the knife (12) is mounted on a guide rod (10) which is displaceably mounted in the arm (1); and in that the two-position linear drive (feed drive 21) for displacement of the guide rod (10) with the knife (12) is disposed as a coupling mechanism between the crank or eccentric drive mechanism (20) on the one hand and the guide rod (10) on the other.
- a lower base plate (2);
- a standard (3) uniting the arm (1) and the base plate (2);
- a support plate (15), allocated to the base plate (2), for at least one workpiece (16, 17, 18);
- a needle bar (5), which is mounted in the arm (1) and movable up and down and which has at least one needle (6, 7);
- a knife (12), which is mounted on the arm (1) and movable up and down, for cutting a slit into the at least one workpiece (16, 17, 18);
- a crank or eccentric drive mechanism (20), which is coupled with the driving motor (19), for generation of an up an down cutting motion of the knife (12); and - a two-position linear drive (feed drive 21) for moving the knife (12) into a lower cutting position and an upper non-cutting position;
characterized in that the knife (12) is mounted on a guide rod (10) which is displaceably mounted in the arm (1); and in that the two-position linear drive (feed drive 21) for displacement of the guide rod (10) with the knife (12) is disposed as a coupling mechanism between the crank or eccentric drive mechanism (20) on the one hand and the guide rod (10) on the other.
2. A sewing machine according to claim 1, characterized in that the two-position linear drive (feed drive 21) is a pneumatically ac-tuated double-action piston-cylinder drive.
3. A sewing machine according to claim 2, characterized in that the housing (25) of the two-position linear drive is articulated to the crank or eccentric drive mechanism (20).
4. A sewing machine according to claim 2 or 3, characterized in that the piston rod (29) of the two-position linear drive (feed drive 21) is connected with the guide rod (10) by a joint (22).
5. A sewing machine according to one of claims 1 to 4, characterized in that the crank or eccentric drive (20) is directly mounted on the driving motor (19).
6. A sewing machine according to one of claims 1 to 5, characterized in that a control unit (34) is provided for joint control of the driving motor (19) and the two-position linear drive (feed drive 21).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19926866A DE19926866C1 (en) | 1999-06-12 | 1999-06-12 | Sewing machine with a cutting blade has a twin-setting pneumatic piston/cylinder linear drive for the blade guide rod as a coupling between the main drive and the blade rod |
| DE19926866.5 | 1999-06-12 | ||
| PCT/EP2000/004324 WO2000077288A1 (en) | 1999-06-12 | 2000-05-13 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2374669A1 true CA2374669A1 (en) | 2000-12-21 |
Family
ID=7911050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002374669A Abandoned CA2374669A1 (en) | 1999-06-12 | 2000-05-13 | Sewing machine |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP4291972B2 (en) |
| CA (1) | CA2374669A1 (en) |
| DE (1) | DE19926866C1 (en) |
| IT (1) | IT1320390B1 (en) |
| TR (1) | TR200103494T2 (en) |
| WO (1) | WO2000077288A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10336600B3 (en) * | 2003-08-08 | 2004-08-05 | Daimlerchrysler Ag | Unit sewing and trimming leather for vehicle interior coverings, includes thrust blade offset behind needle rod in direction of sewing |
| JP4296890B2 (en) * | 2003-09-24 | 2009-07-15 | ブラザー工業株式会社 | Eyelet sewing machine cloth cutting device |
| JP4573658B2 (en) | 2005-01-28 | 2010-11-04 | Ｊｕｋｉ株式会社 | Sewing sewing machine |
| JP4564373B2 (en) * | 2005-02-14 | 2010-10-20 | Ｊｕｋｉ株式会社 | sewing machine |
| JP2006255278A (en) * | 2005-03-18 | 2006-09-28 | Juki Corp | Sewing machine |
| WO2011143812A1 (en) * | 2010-05-19 | 2011-11-24 | Zhang Zhangsheng | Tapping cutter device for eyelet button hole sewing machine |
| DE202015102109U1 (en) | 2015-04-28 | 2016-08-01 | Dürkopp Adler AG | sewing |
| DE102015207758A1 (en) | 2015-04-28 | 2016-11-03 | Dürkopp Adler AG | Sewing system and operating method for this |
| CN105155143A (en) * | 2015-07-29 | 2015-12-16 | 苏州市众禾缝纫科技有限公司 | Intelligent cloth-cutting device of sewing machine and control method |
| DE102016222427A1 (en) | 2016-11-15 | 2018-05-17 | Dürkopp Adler AG | Yarn knife assembly for a two-needle sewing machine, two-needle sewing machine with such a thread knife assembly and piping pocket sewing machine with such a two-needle sewing machine |
| DE102017216725A1 (en) | 2017-09-21 | 2019-03-21 | Dürkopp Adler AG | Method for operating a sewing machine and sewing machine for carrying out the method |
| KR102060295B1 (en) * | 2018-08-28 | 2019-12-27 | 이창식 | Apparatus for cutting the fabrics on the sewing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3144966C1 (en) * | 1981-11-12 | 1983-05-05 | Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern | Sewing machine with a trimmer for the sewing material |
-
1999
- 1999-06-12 DE DE19926866A patent/DE19926866C1/en not_active Expired - Fee Related
-
2000
- 2000-05-13 CA CA002374669A patent/CA2374669A1/en not_active Abandoned
- 2000-05-13 TR TR2001/03494T patent/TR200103494T2/en unknown
- 2000-05-13 JP JP2001503725A patent/JP4291972B2/en not_active Expired - Lifetime
- 2000-05-13 WO PCT/EP2000/004324 patent/WO2000077288A1/en active Application Filing
- 2000-06-02 IT IT2000TO000524A patent/IT1320390B1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TR200103494T2 (en) | 2002-04-22 |
| JP2003502084A (en) | 2003-01-21 |
| JP4291972B2 (en) | 2009-07-08 |
| ITTO20000524A1 (en) | 2001-12-02 |
| ITTO20000524A0 (en) | 2000-06-02 |
| IT1320390B1 (en) | 2003-11-26 |
| DE19926866C1 (en) | 2000-08-24 |
| WO2000077288A1 (en) | 2000-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |