CN212895346U - Sewing machine and stationary knife assembly for sewing machine - Google Patents
Sewing machine and stationary knife assembly for sewing machine Download PDFInfo
- Publication number
- CN212895346U CN212895346U CN202020514868.4U CN202020514868U CN212895346U CN 212895346 U CN212895346 U CN 212895346U CN 202020514868 U CN202020514868 U CN 202020514868U CN 212895346 U CN212895346 U CN 212895346U
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- Prior art keywords
- stationary knife
- knife
- sewing machine
- fixed
- stationary
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- 238000009958 sewing Methods 0.000 title claims abstract description 59
- 238000005520 cutting process Methods 0.000 claims abstract description 44
- 230000010355 oscillation Effects 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The utility model discloses a sewing machine and be used for sewing machine's stationary knife subassembly. The sewing machine (1) comprises a housing (6), a movable thread cutting knife (16) driven for cutting at least one thread and a stationary knife (19) which is matched with the thread cutting knife (16) and is fixedly arranged on the housing, wherein the stationary knife (19) in a stationary knife accommodating part (23) fixed on the housing is in a first stop stationary knife position (19)1) And a second stop stationary knife position (19) corresponding thereto2) In the location area in between with respect to the cuttingThe knife position is continuously movably arranged.
Description
Technical Field
Reference is made herein to the content of german utility model application DE 202019102567.0.
The utility model relates to a sewing machine, this sewing machine have the thread cutter and cooperate and fixed sword of fixed mounting on the casing with it. The utility model discloses still relate to a stationary knife subassembly with stationary knife, this stationary knife sets up in being fixed in the stationary knife accommodating part on the casing.
Background
For example, EP 1992726 a1 discloses a sewing machine having a thread cutting knife and a stationary knife fixedly mounted on a housing. DE 102007022818 a1 discloses a sewing machine with a thread cutting knife and a stationary knife cooperating therewith. DE 102012205049 a1 discloses a thread cutting assembly having a thread cutting knife and a stationary knife. DE 102012213599 a1 discloses a sewing machine with a thread cutting assembly, which has a thread-drawing knife. DE 102017207627 a1 discloses a sewing machine with an assembly for producing an initial needle thread seam with a nominal seam projection. DE 7441263U discloses an upper feed sewing machine with a device for cutting thread, which has a swinging knife and a stationary knife cooperating therewith. EP 2325365 a2 discloses a thread cutting device for a sewing machine.
SUMMERY OF THE UTILITY MODEL
The object of the utility model is to further construct the sewing machine of the above type, make the cutting security and the life who improves the stationary knife with the thread cutter complex stationary knife improve.
According to the utility model discloses, this purpose is realized through a sewing machine and a stationary knife subassembly, and this sewing machine has the utility model discloses a characteristic given in the first aspect, this stationary knife subassembly has the utility model discloses a characteristic given in the second aspect.
The first aspect of the present invention provides a sewing machine, which has: a housing; a driven movable thread cutting knife for cutting at least one suture; the fixed cutter is matched with the wire cutter and fixedly arranged on the shell; wherein the stationary knife in the stationary knife receiving portion fixed to the housing is continuously movably arranged with respect to the cutting stationary knife position in a position area between the first stop stationary knife position and the second stop stationary knife position corresponding thereto.
A second aspect of the present invention provides a stationary blade assembly for a sewing machine, having: the stationary knife in the stationary knife accommodating part is continuously and movably arranged relative to the cutting stationary knife position in a position area between a first stop stationary knife position and a second stop stationary knife position corresponding to the first stop stationary knife position.
According to the present invention, it has been realized that the continuous adjustability and fixability of the stationary knife in the stationary knife receiving portion fixed to the housing between two extreme stop stationary knife positions makes it possible to accurately set the optimum cutting stationary knife position. Therefore, the cutting safety is improved, unnecessary severe abrasion can be avoided when the wire cutter is matched with the fixed cutter, and the service life of the fixed cutter is prolonged again. The thread cutter can cut off the upper thread and/or the lower thread of the sewing machine by matching with the fixed cutter. The stationary knife fixed in the stationary knife accommodating part on the shell is fixedly arranged between a first stop stationary knife position and a second stop stationary knife position corresponding to the first stop stationary knife position relative to the cutting stationary knife position. The stationary knives are thus arranged continuously movably between different stationary knife positions fixed to the housing, into which the stationary knives can be fixed in each case. The stationary blade is floatably mounted in the stationary blade accommodating portion. Alternatively, the stationary knife in the stationary knife housing can be fixed between two stop stationary knife positions in the desired stationary knife position. In this case, the stationary knife can be clamped in the stationary knife holder by means of a corresponding clamping device. This clamping is not mandatory.
By the stationary knife being movable with respect to the cutting stationary knife position and being fixedly arranged between two stop stationary knife positions, the stationary knife can be positioned steplessly into the desired cutting stationary knife position.
In one embodiment of the first aspect of the present invention, the stationary blade is swingably supported in the stationary blade accommodating portion. The above-described swingable support allows simple adjustment of the position of the cutting blade.
In one embodiment of the first aspect of the present invention, the sewing machine is provided with a bearing pin for setting a swing axis to a swing support of the stationary knife in the stationary knife housing. The bearing pin described above sets the oscillating support movement of the stationary knife precisely. The bearing pin can be accommodated in a complementary pin receptacle of the stationary knife.
In one embodiment of the first aspect of the present invention, the swing range of the swing support of the stationary blade in the stationary blade accommodating portion is set via a stopper pin fixed to the housing. The stop pin can accurately set the possible range of the fixed cutter position between the two stop fixed cutter positions. In the stationary knife, a stop groove can be provided which is complementary to the stop pin. The limiting wall of the stop groove can then cooperate with the stop pin to set the stop stationary knife position.
In one embodiment of the first aspect of the present invention, the stationary blade accommodating portion is a part of a stationary blade accommodating holder, and the stationary blade accommodating holder is fixed to a housing of the sewing machine via the stationary blade holder. The multipart stationary knife holder described above simplifies the fixing of the stationary knife.
In one embodiment of the first aspect of the present invention, a wire clamping spring is fixed to the stationary blade accommodating holder. The thread take-up spring may define at least one grip for the cut sewing thread.
In one embodiment of the second aspect of the present invention, the stationary blade assembly can be used as an attachment of a sewing machine. The advantages of the stationary knife assembly are suitable for the sewing machine referred to above. Then, the stationary knife of the stationary knife assembly is used for wire cutting in cooperation with the thread cutter of the sewing machine. Also with this stationary knife assembly, the stationary knife can be mounted floating in the stationary knife holder, or alternatively, the stationary knife can be mounted fixedly in the stationary knife holder in the desired stationary knife position between two stop stationary knife positions, for example via a clamping device.
Drawings
Embodiments of the present invention are further described below with reference to the accompanying drawings. The attached drawings are as follows:
FIG. 1 is a side view of a sewing machine;
FIG. 2 is a perspective view of the sewing machine base plate side assembly having a needle plate, a movable thread cutter driven and a stationary knife fixed to the housing, wherein the thread cutter is in a cutting knife position that oscillates away from the viewer;
FIG. 3 is an enlarged cross-sectional view of FIG. 2;
FIG. 4 is the assembly of FIG. 2, from a similar viewing orientation as FIG. 2, with the wire cutter in a basic cutter position swung toward the viewer, wherein wire cutting is performed between the cutter position and the basic cutter position by the cooperation of the wire cutter and the stationary cutter;
FIG. 5 is an enlarged sectional view of FIG. 4 with the stationary knife receiving holder of the stationary knife receiving portion in perspective with the stationary knife received therein;
FIG. 6 is the assembly as seen from the viewing direction VI in FIG. 4;
FIG. 7 is an enlarged cross-sectional view of FIG. 6 from another viewing direction with the stationary knife receiving holder in perspective;
FIG. 8 is the assembly as seen from the viewing direction VIII in FIG. 7;
FIG. 9 is a guide portion of the wire cutter cooperating with the stationary knife, the stationary knife receiving holder and the stationary knife, wherein different stop stationary knife positions of the swinging in the stationary knife receiving portion are schematically shown; and
fig. 10 is a view similar to fig. 9 with the wire cutter and the stationary knife in the stationary knife accommodating portion of the stationary knife accommodating holder in the cutting instant position of the wire cutter, as compared with the stationary knife between the position of fig. 2 and the position of fig. 4.
Detailed Description
The sewing machine 1 has a base plate 2 with a bed 3 extending upwardly therefrom and an angled arm 4. The arm ends with a head 5. The base plate 2, the bed 3, the arm 4 and the head 5 are enclosed by a housing 6 of the sewing machine 1. An arm shaft (not shown in the figure) is rotatably mounted in the arm 4. Which in the head 5 drives via a crank-link mechanism a needle bar 7 mounted axially movably in the head 5. The shank 7 has a needle 8 at its lower end. The needle can move up and down on the vertical shaft through a crank connecting rod mechanism. The needle 8 guides a needle thread (not shown) fed from a stitch (not shown) in an eye of the needle.
The base plate 2 supports a bed plate 9, and a sewing material to be sewn by the sewing machine 1 can be placed on the bed plate 9. The bottom plate 9 is divided into several parts. Part of the base plate 9 is a needle plate 10 (see for example fig. 2) which is screwed to the base plate 2. In the case of the non-needle feed sewing machine 1, the needle plate has a needle hole 11 through which the needle 8 passes. The needle board 10 also has a rectangular through-opening 12, through which the upper run of the lower slider 13 passes. The lower slide 13 is in driving connection in a known manner with a drive shaft which is arranged below the base plate 2. For the needle-feed sewing machine 1, the needle hole 11 can be designed in the lower slider 13.
When the sewing machine 1 is used for sewing, the gripper 14 engages the needle 8 in a known manner, and can be rotated about a vertical gripping axis. In the grip body 15 of the gripper 14, a pot-shaped bobbin case for accommodating the remaining grip thread or under thread is mounted.
A wire cutter or a wire drawing knife 16 is used to cut the clamping wire. The pull-wire knife can be swung about a vertical swing axis between a home position shown in fig. 4 and a wire sensing position shown in fig. 2. The oscillating movement of the wire cutter 16 is driven, for example, via a pneumatic drive. Other drive mechanisms may also be used.
In the illustration according to fig. 2, the thread-cutter 16 has a sickle-shaped basic shape, the free end of which extends around the bobbin case of the gripper 14 in the home position.
The blade surface 17 (see fig. 10) of the stay wire cutter 16 is fitted with the cutting edge of the stationary blade surface 18 of a fixed cutting wire 19 fixed to the housing for wire cutting. The stationary blade 19 has a roughly ground rectangular parallelepiped shape and has a stopper groove 19a for fixing a stopper pin 20 to the housing to set a stopper stationary blade position 19 at which the stationary blade 19 is swingably supported1、192(see fig. 9), which is carried out about a pivot axis 21 in a stationary knife holder yet to be described. Furthermore, the stationary knife 19 has a through-opening for the bearing pin 22 (see fig. 8). The bearing pin 22 predetermines the swing axis 21 of the stationary blade 19 swing-supported in the stationary blade accommodating portion.
The stationary blade accommodating portion 23 for the stationary blade 19 is a part of the stationary blade accommodating holder 24. The stationary blade housing holder is fixed to the housing 6 of the sewing machine 1 via a stationary blade holder 25.
The stationary blade receiving holder 24 is mounted positionally adjustably relative to the stationary blade holder 25.
The fixed knife 19 in the fixed knife containing part 23 fixed on the shell is at the first stop fixed knife position (see the position 19 in figure 9)1) And a second stop stationary knife position corresponding thereto (see position 19 in fig. 9)2) With respect to the position of the cutting stationary knife in the position area therebetween (see, for example, the position of the stationary knife 19 in fig. 10)) Is continuously adjustable and fixable. This continuous adjustment is carried out by the stationary blade 19 oscillating about the oscillation axis 21 within an oscillation range which is predetermined by the stop groove 19a in the circumferential direction about the oscillation axis 21. In the stop stationary knife position 191In (1), the stopper pin 20 is hit by the restricting wall of the stopper groove 19 a; and in a second stop stationary knife position 192In the middle, the stopper pin 20 is hit by the restricting wall of the opposite side stopper groove 19 a. The bearing pin 22 passes through a passage or bore 26 of the stationary knife 19 for pivotal mounting.
During the wire cutting process, the stationary knife 19 is continuously adjusted while being engaged with the wire cutter 16. For this purpose, the stationary blade 19 is floatingly mounted in the stationary blade accommodating portion 23.
In addition, the fixed knife 19 in the fixed knife holder 23 can be moved into the limit fixed knife position 19 by means of a fixed clamping device (not shown in the figures)1And 192And fixed at the desired fixed knife position. Then, when the cut surfaces of the wire cutter 16 and the fixed knife 19 are brought into contact with each other in cooperation with cutting, such fixation may be performed at the time of initial adjustment of the fixed knife 19. Then, in the relative cutting position of the stationary knife 19, it can be fixed in the stationary knife accommodating portion 23. This fixation is not mandatory.
The clamping spring 27 is fixed to the stationary blade receiving holder 24 via a screw 28. In the home position of the thread cutting knife 16 (see fig. 4), the thread clamping spring 27 cooperates with the thread cutting knife 16 to clamp and hold the cut thread, i.e. the upper thread and the lower thread.
The stationary knife 19 can be designed as a reversible stationary knife, that is to say can be designed such that it can be used in different orientations in the stationary knife holder, wherein the respective other cutting edge of the stationary knife cooperates with the blade face of the thread cutting knife 16 for thread cutting. The stationary knife 19 can in principle be constructed as described in EP 1992726 a1, except that the stationary knife 19 has a recess for the bearing pin 22 on the one hand and the retaining pin 20 on the other hand. Also stationary knives may be used in different directions, for example as disclosed in WO 95/19245 a1 or DE 3621785 a 1.
After sewing by means of the sewing machine 1, the thread cutting knife is operated, wherein it is first transferred from the home position to the thread detecting position, and then, after detecting the upper thread and the lower thread, it is transferred again to the home position. In this case, the wire cutting is carried out by the engagement of the blade surface 17 with the stationary blade 19 and the cut wire is then held in a defined manner between the wire cutter 16 and the wire clamping spring 27.
The sewing machine may be a sewing machine that feeds a sewing material in the form of a pulley. The sewing machine 1 can be designed as a cylinder sewing machine. The sewing machine 1 can also be designed as a platform-type or free-arm sewing machine. The described configuration of the thread cutting/stationary knife can be applied to vertical sewing machines, in addition to the horizontal sewing machine exemplified in the figures, for which the bed is extended vertically instead of horizontally and the stitch forming tool is correspondingly inclined by 90 °.
Claims (8)
1. The sewing machine (1) is characterized in that the sewing machine (1) is provided with
-a housing (6),
-a driven movable thread cutting knife (16) for cutting at least one thread,
-a stationary knife (19) cooperating with the wire cutter (16) and fixedly mounted to the housing,
-wherein the stationary knife (19) in a stationary knife accommodation (23) fixed to the housing is in a first stop stationary knife position (19)1) And a second stop stationary knife position (19) corresponding thereto2) The position area between the two is continuously movably arranged relative to the position of the cutting stationary knife.
2. The sewing machine according to claim 1, wherein the stationary knife (19) is swingably supported in the stationary knife accommodating portion (23).
3. Sewing machine as in claim 2, characterized in that a bearing pin (22) is provided for setting the oscillation axis (21) for the oscillating support of the stationary knife (19) in the stationary knife housing (23).
4. The sewing machine according to claim 2, characterized in that the swing range of the swing support of the fixed knife (19) in the fixed knife housing (23) is set via a stopper pin (20) fixed to the housing.
5. The sewing machine according to claim 3, characterized in that the swing range of the swing support of the fixed knife (19) in the fixed knife housing (23) is set via a stopper pin (20) fixed to the housing.
6. Sewing machine as in any claim from 1 to 5, characterized in that said stationary knife housing (23) is part of a stationary knife housing holder (24) fixed on said housing (6) of said sewing machine (1) via a stationary knife holder (25).
7. Sewing machine as in claim 6, characterized in that a thread clamping spring (27) is fixed on said stationary knife containing holder (24).
8. The fixed knife assembly for the sewing machine is characterized by comprising a fixed knife (19) and a fixed knife containing part (23) fixed on a shell, wherein the fixed knife (19) in the fixed knife containing part is positioned at a first stop fixed knife position (19)1) And a second stop stationary knife position (19) corresponding thereto2) The position area between the two is continuously movably arranged relative to the position of the cutting stationary knife.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202019102567.0 | 2019-05-08 | ||
| DE202019102567.0U DE202019102567U1 (en) | 2019-05-08 | 2019-05-08 | Sewing machine and counter-knife assembly for one machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212895346U true CN212895346U (en) | 2021-04-06 |
Family
ID=69844535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020514868.4U Active CN212895346U (en) | 2019-05-08 | 2020-04-09 | Sewing machine and stationary knife assembly for sewing machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3736369B1 (en) |
| CN (1) | CN212895346U (en) |
| DE (1) | DE202019102567U1 (en) |
| TW (1) | TWM606323U (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7441263U (en) * | 1975-04-17 | Pfaff Industriemaschinen Gmbh | Device on sewing machines for cutting thread chains | |
| DE3303034A1 (en) * | 1983-01-29 | 1984-08-02 | Kochs Adler Ag, 4800 Bielefeld | Thread cut-off device for a sewing machine |
| DE3621785A1 (en) | 1986-06-28 | 1988-01-14 | Duerkoppwerke | SEWING MACHINE WITH A SEWING CUTTING DEVICE |
| US5492043A (en) | 1994-01-13 | 1996-02-20 | Badillo; Paul | Component cutting block and holder for stationary surger blade |
| DE102007022818A1 (en) * | 2007-05-15 | 2008-11-20 | Dürkopp Adler AG | sewing machine |
| DE102009004218A1 (en) * | 2009-01-09 | 2010-07-15 | Dürkopp Adler AG | Thread cutting device for a sewing machine |
| JP2011101718A (en) * | 2009-11-11 | 2011-05-26 | Juki Corp | Thread cutting device of sewing machine |
| DE102012205049A1 (en) * | 2012-03-29 | 2013-10-02 | Dürkopp Adler AG | Thread cutting assembly for a lace hole sewing machine |
| DE102012213599A1 (en) * | 2012-08-01 | 2014-02-06 | Dürkopp Adler AG | Thread-pulling knife for a sewing machine, thread trimming assembly and sewing machine with such a thread-pulling knife |
| DE202016104320U1 (en) * | 2015-10-12 | 2016-09-19 | Xi'an Typical Europe Gmbh | sewing machine |
| DE102017207627A1 (en) * | 2017-05-05 | 2018-11-08 | Dürkopp Adler AG | Assembly for creating a seam beginning upper thread with a desired seam projection |
-
2019
- 2019-05-08 DE DE202019102567.0U patent/DE202019102567U1/en active Active
-
2020
- 2020-03-13 EP EP20163068.8A patent/EP3736369B1/en active Active
- 2020-04-09 CN CN202020514868.4U patent/CN212895346U/en active Active
- 2020-04-16 TW TW109204510U patent/TWM606323U/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP3736369B1 (en) | 2024-05-22 |
| DE202019102567U1 (en) | 2020-08-11 |
| TWM606323U (en) | 2021-01-11 |
| EP3736369A1 (en) | 2020-11-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Bielefeld, Germany Patentee after: Durkep Adler Co.,Ltd. Address before: Bielefeld, Germany Patentee before: D rkopp Adler AG |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Bielefeld, Germany Patentee after: Dukepu Aihua Co.,Ltd. Country or region after: Germany Address before: Bielefeld, Germany Patentee before: Durkep Adler Co.,Ltd. Country or region before: Germany |