CN101845718B - Two-needle stem pattern sewing machine - Google Patents
Two-needle stem pattern sewing machine Download PDFInfo
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- CN101845718B CN101845718B CN2009101683480A CN200910168348A CN101845718B CN 101845718 B CN101845718 B CN 101845718B CN 2009101683480 A CN2009101683480 A CN 2009101683480A CN 200910168348 A CN200910168348 A CN 200910168348A CN 101845718 B CN101845718 B CN 101845718B
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- 238000009958 sewing Methods 0.000 title claims abstract description 177
- 230000007246 mechanism Effects 0.000 claims description 53
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000003028 elevating effect Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
- D05B1/08—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making multi-thread seams
- D05B1/10—Double chain-stitch seams
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B35/00—Work-feeding or -handling elements not otherwise provided for
- D05B35/02—Work-feeding or -handling elements not otherwise provided for for facilitating seaming; Hem-turning elements; Hemmers
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/14—Needle-bar drives
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/30—Details
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2305/00—Operations on the work before or after sewing
- D05D2305/32—Measuring
- D05D2305/36—Quality control
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a two-needle stem pattern sewing machine. Wherein two needle stems are arranged on the head of the sewing machine, the continuous double-thread sewing operation is performed by using the two-needle stem pattern sewing machine, two needle stems are used for performing the double-thread sewing, thus the operation time is shortened, thus an interval between a single-thread sewing track and a two-thread sewing track is kept at a certain value, each needle stem is controlled for a sewing article with the direction switched to the vertical direction, thus beautiful patterns are sewed on the sewing article, moreover, when a double-single thread composite style and pattern is sewed, the needle stems can be switched selectively to freely select a single-thread or double-thread sewing operation, thus the productivity is effectively improved.
Description
Technical Field
The invention discloses a sewing machine, in particular to a double-needle switching type pattern sewing machine which can selectively perform continuous double-thread or single-thread sewing operation after two needle rods are arranged on a sewing head.
Background
Fig. 1 is a perspective view of an important part of an embodiment of a conventional pattern sewing machine, in which a sewing head 1 is extended to the front of a body 3 by a head arm 2 at an upper part of a table (not shown) and is positioned right above a sewing material fixing member 4.
The sewing machine drives the upper shaft and the lower shaft of the sewing machine, respectively, as a sewing machine for performing single-thread sewing, that is, as a sewing machine having only a single needle bar 5, double-thread sewing cannot be performed on a sewing object which requires double-thread sewing at a certain interval like an air bag (air bag), and if single-thread sewing is performed in a horizontal direction along a lateral length direction of a single-thread sewing thread after the single-thread sewing is completed, the two-step sewing operation lengthens an operation time.
In the two-stage sewing, it is relatively difficult to maintain the interval between the single-thread sewing stitch and the double-thread sewing stitch at a constant value, and when the sewing operation is switched to the vertical direction in the double-thread sewing operation as described above, the inner needle bar is apt to continuously sew one place, and the sewing thread at the position switched to the vertical direction in the inner side becomes thick, which significantly deteriorates the sewing quality.
Further, Korean patent application No. 10-2007-0032875 (title of the invention: two-needle switching pattern Sewing machine) invented to solve the above problems discloses a pattern sewing machine comprising: a sewing machine support part capable of supporting the sewing machine; a head arm lifting device 30 mounted on the fixed frame 20 of the sewing machine support part and capable of moving the sewing head 40 of the sewing machine up and down; x-axis and Y-axis transfer mechanisms 60, 70 mounted on the sewing machine support part and capable of moving the sewing object fixing member 50 along the left-right or front-back direction; the present invention drives an upper shaft and a lower shaft, respectively, wherein the sewing head 40 has a plurality of needle bars 42, 44 to perform continuous double-thread sewing.
Fig. 2 is a perspective view of a two-needle switching pattern sewing machine according to a preferred embodiment of the present invention, fig. 3a is a front view of the two-needle switching pattern sewing machine according to the present invention, fig. 3b is an enlarged view of a portion "a" shown in fig. 3a, and fig. 4 is a side view of the two-needle switching pattern sewing machine according to the present invention.
This is further explained below in conjunction with the above-mentioned figures. The sewing machine support is formed with support columns 22 vertically at both side ends of a table 10 on which a sewing object can be placed, and a fixed frame 20 composed of a rectangular steel pipe is supported in a horizontal direction between the support columns 22.
Moreover, oval guide holes 12 are formed on both sides of the upper surface of the table 10, and the guide holes 12 can transmit the movement of fig. 4 of the Y-axis (front-back direction of the sewing machine) transfer mechanism 70 below the table 10 to the sewn product fixing member 50 above the table 10. A sewing head 40 is coupled to the front of the center of the fixing frame 20. The sewing head 40 can perform a sewing operation with respect to a sewing object fixed to a sewing object fixing member 50, and a head arm lifting device 30 for moving the sewing head 40 up and down is disposed between the sewing head 40 and the fixing frame 20.
An upper shaft driving motor 38 capable of driving an upper shaft (not shown) in the sewing head 40 is disposed at the rear of the fixed frame 20. The upper shaft drive motor 38 is connected to the upper shaft, but is not connected to the lower shaft (not shown) that drives the bobbin case (not shown).
As shown in fig. 3a, the X-axis transfer mechanism 60 is disposed along the X-axis direction on the upper side of the table 10, and the Y-axis transfer mechanism 70 is disposed along the Y-axis direction on both sides of the lower side of the table 10.
The X-axis transfer mechanism 60 includes: an X-axis frame 62 extending a long distance in an X-axis direction, i.e., a left-right direction; a guide rail 64 mounted or formed on the X-axis frame 62; and a fixing portion 66 that moves left and right along the guide rail 64. The sewing object fixing member 50 capable of fixing the sewing object is coupled to the fixing portion 66, and the fixing portion 66 moves left and right along the guide rail 64, so that a wide range of sewing work can be performed in the X-axis direction even if the sewing head 40 does not move.
The Y-axis transfer mechanism 70 is a device that can move in the Y-axis direction (i.e., the front-rear direction), and as shown in fig. 3b, the Y-axis transfer mechanism 70 extends in the front-rear direction, and the moving unit 72 can move in the front-rear direction. The moving unit 72 is configured to be movable in the front-rear direction, and preferably, a driving belt 72a is used. A fixing member 72b protruding upward is coupled to an upper side of the driving belt 72a, and the fixing member 72b moves in the front-rear direction in accordance with the movement of the driving belt 72 a.
The fixing members 72b are arranged on the Y-axis transfer mechanism 70 at both sides and are upwardly exposed through the guide holes 12 of the table 10. The mount 72b is connected to the X-axis frame 62.
When the moving unit 72 moves, that is, when the fixing member 72b moves in the front-rear direction along with the movement of the driving belt 72a, the sewing object fixing member 50 connected to the X-axis frame 62 moves its position in the front-rear direction, and thus a wide range of sewing work can be performed in the Y-axis direction even if the sewing head 40 does not move.
As shown in fig. 3 or 4, the X-axis transfer mechanism 60 is provided with an X-axis transfer motor (not shown), and the Y-axis transfer mechanism 70 extends to a side surface by a long distance in the front-rear direction. The X-axis transfer mechanism 60 is located at an upper side of the table 10 and connected to the sewing mount 50, and the Y-axis transfer mechanism 70 is located at a lower side of the table 10 and connected to the X-axis transfer mechanism 60 through the guide hole 12.
The specific functions of the X-axis and Y-axis transfer mechanisms 60 and 70 and the head arm lift device 30 have been described in detail in korean application No. 10-2004-0007981 previously filed by the present applicant, and thus the detailed description thereof will not be provided herein.
When the sewing operation is performed near the corner in the patent application No. 10-2007-0032875 with the structure, the problem of inconsistent interval of the sewn double-thread stitches occurs.
Disclosure of Invention
[ technical problem to be solved by the invention ]
In order to solve the above-mentioned problems of the prior art, it is an object of the present invention to provide a pattern sewing machine of a double needle switching type which can shorten the operation time by a double thread sewing operation.
Another object of the present invention is to provide a double needle switching pattern sewing machine, which maintains a constant interval between single thread sewing stitches and double thread sewing stitches, and prevents a sewing thread from being thickened due to an influence of a needle bar at one side, thereby effectively improving sewing quality.
Other objects of the present invention will become apparent to those skilled in the art from the detailed description of the invention.
[ technical means for solving problems ]
In order to achieve the above object, a two-needle switching pattern sewing machine according to an embodiment of the present invention includes: a sewing machine support part capable of supporting the sewing machine; a head arm lifting device which is arranged on the fixed frame of the sewing machine supporting part and can make the sewing head of the sewing machine move up and down; an X-axis and Y-axis transfer mechanism installed on the sewing machine support part and capable of moving a sewing object fixing part along the left and right or front and back directions, the invention respectively drives an upper shaft and a lower shaft, the sewing head part is provided with a plurality of needle bars and can perform continuous double-thread sewing operation, wherein the X-axis and Y-axis transfer mechanism comprises: a needle bar rotation driving mechanism for driving the needle bar to rotate; the rotating shuttle seat rotating driving mechanism can drive the rotating shuttle linked with the needle rod to rotate; and a needle switching device capable of selectively driving the plurality of needle bars reciprocating in the up-down direction.
Preferably, the needle bar rotation drive mechanism includes: a driven pulley mounted on an outer side of the needle bar; a synchronous belt, one side of which is mounted on the driven pulley; a driving pulley on which the other side of the synchronous belt is mounted; and a needle bar rotation driving motor for driving the driving pulley to rotate.
Preferably, the rotating shuttle seat rotation driving mechanism includes: a rotating shuttle seat, on which the rotating shuttle is arranged; a first pulley installed at one side of the rotating shuttle seat; a rotation driving belt, one side of which is mounted on the driven pulley; a second pulley on which the other side of the rotation driving belt is mounted; and a rotating shuttle seat rotating drive motor for driving the drive pulley to rotate.
Preferably, the needle switching device includes: a needle bar lifting member, one side of which is installed on the upper shaft of the sewing machine; a rotating block installed at the outer side of the needle bar and combined with the other side of the needle bar lifting member; a clutch lever unit installed at one side of the rotating block and selectively controlling the plurality of needle bars moving up and down; and a clutch lever control mechanism installed at the other side of the rotating block and capable of controlling the operation of the clutch lever unit.
Preferably, the clutch lever unit includes: a slider located outside the needle bars, one side of the slider being fixed to the rotating block and allowing the plurality of needle bars to slide; a plurality of clutch levers, one side of which is hinged on the sliding block and rotates around the hinged part under the control of the clutch lever control mechanism; and a plurality of lower fixing pins coupled to lower portions of the plurality of clutch levers, and engaged with the clutch levers to clamp or separate the clutch grooves on one side of the needle bars, thereby controlling the vertical movement of the plurality of needle bars.
Preferably, the clutch lever control mechanism is an actuator.
Preferably, the actuator includes a clutch block at an upper portion thereof, and is capable of controlling a rotational movement of the clutch lever.
[ PROBLEMS ] the present invention
As described above, for the sewed article which needs to be double-thread sewed at a certain interval like the air bag, the present invention can perform double-thread sewing by two needle bars installed in parallel on the sewing head of the sewing machine, effectively shortening the operation time.
Moreover, the interval between the single-thread sewing stitch and the double-thread sewing stitch can be maintained at a certain value through the two needle rods, and the sewing quality is effectively improved.
Moreover, the needle bars can be controlled respectively for the sewed articles which need to switch the direction to the vertical direction, thereby beautiful sewing stitches can be sewed on the sewed articles.
Moreover, when sewing the double-single thread compound pattern, the needle bar can be selectively switched to freely select the single-thread or double-thread sewing operation, thereby effectively improving the productivity.
Drawings
FIG. 1 is a perspective view of an important part of an embodiment of a conventional pattern sewing machine;
FIG. 2 is a perspective view of a two-needle switching pattern sewing machine according to another embodiment of the present invention;
FIG. 3a is a front view of a two-needle switching pattern sewing machine according to another embodiment of the present invention;
FIG. 3b is an enlarged view of section "A" of FIG. 3 a;
FIG. 4 is a side view of a two-needle switching pattern sewing machine according to another embodiment of the present invention;
FIG. 5 is a perspective view of a two-needle switching pattern sewing machine according to a preferred embodiment of the present invention;
FIG. 6 is a perspective view of an important part of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention;
FIG. 7 is a perspective view of a rotating shuttle seat rotating drive mechanism of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention;
FIG. 8 is a perspective view of a needle bar rotation driving mechanism and a needle switching device of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention;
FIG. 9 is a partially exploded perspective view of a needle switching device of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention;
FIG. 10a is a reference view showing the movement of the needle bar of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention;
FIG. 10b is a reference view of the needle bar of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention at rest;
FIG. 11 is an exploded perspective view of a needle switching device of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention;
fig. 12 and 13 are operation diagrams of a double-thread sewing operation of the double needle switching pattern sewing machine of the present invention, fig. 12 is a diagram of a circular type double-thread sewing operation, and fig. 13 is a diagram of a right-angle type double-thread sewing operation.
< description of the Main graphic marks >
102: head-arm sections 106-1, 106-2: rotating shuttle (shuttle shell)
110: needle switching device 111: upper shaft
113: the needle bar elevating member 113-1: connecting rod
113-2: swing bracket 113-3: bonding bump
114: rotation blocks 115, 116: clutch lever control mechanism
115-1, 116-1: clutch block 117: clutch lever unit
117-1: clutch lever 117-2: lower fixing pin
117-3: spring 117-4: locking piece
118: the slide block 119: stop piece
120: fixing the frame 121: working table
130: head-arm lift device 140: sewing head
142. 144, and (3) 144: needle bars 142-1, 144-1: separation and combination groove
143. 145: a needle 180: needle bar rotary driving mechanism
181: driven pulley 183: synchronous belt
185: drive pulley 187: needle bar rotary driving motor
190: rotating shuttle seat rotation driving mechanism 191: rotating shuttle seat
192: first pulley 193: rotary drive belt
195: second pulley 197: rotating shuttle seat rotation driving motor
Detailed Description
The preferred embodiments of the present invention will be further described with reference to the accompanying drawings.
Fig. 5 is a perspective view of a double needle switching pattern sewing machine according to a preferred embodiment of the present invention, fig. 6 is a perspective view of an important part of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention, and fig. 7 is a perspective view of a rotary hook rotating drive mechanism of the double needle switching pattern sewing machine according to the preferred embodiment of the present invention.
Fig. 8 is a perspective view of a needle bar rotation driving mechanism and a needle switching device of a two-needle switching pattern sewing machine according to a preferred embodiment of the present invention, fig. 9 is a partially exploded perspective view of the needle switching device of the two-needle switching pattern sewing machine according to the preferred embodiment of the present invention, fig. 10a is a reference view of a needle bar of the two-needle switching pattern sewing machine according to the preferred embodiment of the present invention during movement, fig. 10b is a reference view of the needle bar of the two-needle switching pattern sewing machine according to the preferred embodiment of the present invention during standstill, and fig. 11 is an exploded perspective view of the needle switching device of the two-needle switching pattern sewing machine according to the preferred embodiment of the present invention.
Further, fig. 12 and 13 are operation diagrams of a double thread sewing operation of the double needle switching type pattern sewing machine of the present invention, fig. 12 is a circular type double thread sewing operation diagram, and fig. 13 is a right angle type double thread sewing operation diagram.
As shown in the above drawings, the double needle switching pattern sewing machine according to the preferred embodiment of the present invention comprises: a sewing machine support part capable of supporting the sewing machine; a head arm lifting device 130 mounted on the fixing frame 120 of the sewing machine support part and capable of moving the sewing head 140 of the sewing machine up and down; an X-axis and Y-axis transfer mechanism (refer to fig. 3a to 4 of the prior art, graphic marks 60 and 70) installed on the support of the sewing machine and capable of moving the sewing material fixing member 150 in the left-right or front-back direction, the present invention respectively drives an upper shaft (not shown) and a lower shaft (not shown), the sewing head 140 has a plurality of needle bars 142 and 144 and can perform a continuous double-thread sewing operation, comprising: comprises a needle bar rotary driving mechanism 180, a rotary shuttle seat rotary driving mechanism 190 and a needle switching device.
The needle bar rotation drive mechanism 180, the rotary shuttle seat rotation drive mechanism 190, and the needle switching device are operated under the control of a control unit (not shown) of the sewing machine.
Preferably, the sewing machine support part includes: a table 121 on which a sewing object can be placed; and a fixing frame 120 for supporting the working table 121.
The following detailed description will be omitted in describing the present invention: and those portions of the art that repeat the above summary of the invention are included as part of the present disclosure and are intended to be readily apparent to those skilled in the art and to enable a person skilled in the art to make and use the invention.
As shown in fig. 7 and 9, the needle bar rotation driving mechanism 180 includes a driven pulley 181, a timing belt 183, a driving pulley 185, and a needle bar rotation driving motor 187.
The driven pulley 181 is attached to the outside of the needle bars 142 and 144, and has a cylindrical shape and a gear portion formed along the outer peripheral surface.
The driving pulley 185 is formed in a cylindrical shape with a predetermined distance from the driven pulley 181, and has a gear portion formed along an outer circumferential surface thereof.
The needle bar rotation driving motor 187 is mounted at a lower portion of the head arm portion 102 of the sewing machine, and a central portion of the driving pulley 185 is coupled to a rotation shaft of the needle bar rotation driving motor 187.
The timing belt 183 is attached to an outer circumferential surface of the driven pulley 181 at one side and to an outer circumferential surface of the driving pulley 185 at the other side, and transmits a rotational driving force of the driving pulley 185 to the driven pulley 181. In this case, the timing belt 183 has a gear coupling groove on an inner circumferential surface thereof and is coupled to the gear portions of the driven pulley 181 and the driving pulley 185, so that the driving pulley 185 is rotated while being driven when the rotary shaft is rotated by the needle bar rotation driving motor 187.
As shown in fig. 7 and 8, the rotating shuttle seat rotation driving mechanism 190 includes a first pulley 192, a rotation driving belt 193, a second pulley 195, and a rotating shuttle seat rotation driving motor 197.
The first pulley 192 is attached to a lower portion of a rotating hook base 191 on which the rotating hooks (bobbin case) 106-1 and 106-2 are arranged, and has a cylindrical shape and a gear portion formed along an outer peripheral surface thereof. At this time, the bobbin (bobbin) around which the lower thread can be wound is disposed inside the rotary shuttles (bobbin cases) 106-1 and 106-2. At this time, the lower thread is engaged with the upper thread threaded on the needles 143, 145 of the sewing machine.
The second pulley 195 has a cylindrical shape with a predetermined distance from the first pulley 192, and a gear portion is formed along an outer circumferential surface thereof.
The rotating shuttle seat rotating driving motor 197 is installed on a bottom plate portion of the sewing machine, and a center portion of the second pulley 195 is coupled to a rotating shaft of the rotating shuttle seat rotating driving motor 197, so that the second pulley 195 is driven to rotate simultaneously when the rotating shuttle seat rotating driving motor 197 rotates the rotating shaft.
The rotation drive belt 193 is attached to the outer peripheral surface of the first pulley 192 on one side and the outer peripheral surface of the second pulley 195 on the other side, and can transmit the rotational drive force of the second pulley 195 to the first pulley 192. At this time, the gear coupling groove located on the inner circumferential surface of the rotation driving belt 193 is coupled to the gear portions of the first pulley 192 and the second pulley 195.
As shown in fig. 9 to 13, the needle switching device 110 includes a needle bar lifting member 113, a rotary block 114, a clutch lever unit 117, and clutch lever control mechanisms 115 and 116.
The needle bar lifting member 113 is mounted at one side to the rear end of the upper shaft 111 of the sewing machine, and coupled at the other side to the rotary block 114. Preferably, the needle bar elevating member 113 includes: a connecting rod 113-1, the upper part of which is mounted on the upper shaft 111; and a swing bracket 113-2 coupled to a lower portion of the link rod 113-1. At this time, the coupling protrusion 113-3 is protrusively formed at one side of the swing bracket 113-2.
The rotary block 114 is mounted on the outer side of the needle bars 142 and 144, and has a cylindrical shape with a certain thickness, and a coupling groove is formed on the outer circumferential surface. At this time, the coupling protrusion 113-3 of the swing bracket 113-2 is coupled to the coupling groove, so that the rotation block 114 can be moved up and down by the influence of the needle bar elevating member 113.
The clutch lever unit 117 is installed at one side of the rotation block 114, and can selectively control the plurality of needle bars 142 and 144 that move up and down.
Preferably, the clutch lever unit 117 includes: a slider 118 which is positioned outside the needle bars 142 and 144, one side of which is fixed to the rotary block 114, and which allows the plurality of needle bars 142 and 144 to slide; a plurality of clutch levers 117-1, one side of which is hinged to the slider 118 and which rotate around the hinge portion under the control of the clutch lever control means 115 and 116; and a plurality of lower fixing pins 117-2 coupled to lower portions of the plurality of clutch levers 117-1, and controlling the up and down movement of the plurality of needle bars 142 and 144 by engaging or disengaging the clutch levers 117-1 and 144-1 at one side of the needle bars 142 and 144 in conjunction with the clutch levers 117-1.
The above-described clutch lever control mechanisms 115 and 116 are constituted by a plurality of actuators. Preferably, the actuator is pneumatically operated, and has clutch blocks 115-1 and 116-1 at an upper portion thereof to control the rotational movement of the clutch lever 117-1.
The operation and effect of the preferred embodiment of the present invention having the above-described structure will be described below. In the curved (curve) sewing operation shown in fig. 12, the left/right sewing thread L, R is moved in the direction of the arrow by operating the two needle bars 142, 144 at a predetermined distance. In order to sew in the circular direction, the needle bars 142 and 144 to which the needles 143 and 145 are attached and the rotating shuttle seat 191 to which the rotating shuttle is attached need to rotate in accordance with the advancing direction so that the interval of the sewing thread L, R is maintained at a constant value. At this time, the needle bars 142 and 144 are driven to rotate by the needle bar rotation drive mechanism 180, and the rotating shuttle 191 is driven to rotate by the rotating shuttle seat rotation drive mechanism 190.
The operation of the needle bar rotation drive mechanism 180 will be described below. The needle bar rotation driving motor 187 is driven by the control unit, and the driving pulley 185 mounted on the rotation shaft of the needle bar rotation driving motor 187 is rotated at the same time. A timing belt 183 having one side mounted on the driving pulley 185 transmits a rotational force to the driven pulley 181 to rotate the driven pulley 181, thereby rotating the needle bars 142 and 144.
The operation of the rotating shuttle seat rotation drive mechanism 190 will be described below. The control unit activates the rotating shuttle seat rotating driving motor 197, and the second pulley 195 mounted on the rotating shaft of the rotating shuttle seat rotating driving motor 197 rotates at the same time. A rotation driving belt 193 having one side mounted on the second pulley 195 transmits a rotational force to the first pulley 192 to rotate the first pulley 192, thereby rotating the rotating shuttle seat 191.
When the corner (corner) sewing operation shown in fig. 13 is performed, the two needle bars 142 and 144 of the sewing machine of the present invention having the above-described double needle function perform the sewing operation at the same time, and when it is necessary to perform the sewing operation in the direction of the arrow, the left sewing thread L is shifted to the vertical direction after advancing along the stitch a, and then advances along the stitch b, the left needle bar 142 is operated during the above-described process to continue the left sewing thread L, the right needle bar 144 is kept stopped to stop the right sewing thread R at the pause position h, and the sewing operation is performed in the direction of the arrow after the sewing direction is changed by the sewing person.
In order to perform the sewing operation in the corner direction, the left and right needle bars 142 and 144 need to be selectively driven, and at this time, the left and right needle bars 142 and 144 are selectively driven by the needle switching device.
The operation of the needle switching device will be described below. The swing bracket 113-2 of the needle bar elevating member 113 moves up and down according to the movement of the upper shaft 111, and the rotation block 114 coupled to the swing bracket 113-2 is linked to the swing bracket 113-2. Therefore, the slider 118 fixed to the rotary block 114 is caused to move up and down, and the plurality of needle bars 142 and 144 are also caused to move up and down at the same time. A technique for driving the needle bar lifting member 113 by the operation of the upper shaft 111 is well known to those skilled in the art, and thus, a detailed description thereof will not be provided herein.
At this time, in order to stop the right needle bars 142 and 144, the right clutch lever control mechanisms 115 and 116 among the plurality of clutch lever control mechanisms 115 and 116 are operated under the control of the control unit to move the clutch blocks 115-1 and 116-1 downward, and the clutch blocks 115-1 and 116-1 abut on the upper portion of the clutch lever 117-1 to move the clutch lever 117-1 downward. Then, as the upper portion of the clutch lever 117-1 moves downward, the lower fixing pin 117-2 coupled to the lower portion of the clutch lever 117-1 is moved by rotating about the hinge point as a center of gravity. At this time, the lower fixing pin 117-2 provided in the engaging grooves 142-1 and 144-1 for holding the needle bars 142 and 144 is moved in the direction of disengaging, and the lower fixing pin 117-2 transmits a driving force for moving the needle bars 142 and 144 up and down, so that the right needle bar 144 is stopped by disengaging the lower fixing pin 117-2.
The operation of the lower fixing pin 117-2 to be disengaged or engaged with the movement of the clutch lever 117-1 is well known to those skilled in the art, and thus, a detailed description thereof will not be provided.
The foregoing illustrates the technical idea of the present invention, but various variations and modifications can be made within the scope of the technical idea of the present invention, which will be apparent to those skilled in the art.
The preferred embodiments of the present invention are merely illustrative and not restrictive, and the scope of the technical idea of the present invention is not limited by the above embodiments.
Therefore, the true scope of the claims should be construed in accordance with the doctrine of equivalents and all technical equivalents should be construed as being encompassed by the present claims.
Claims (6)
1. A double-needle switching pattern sewing machine comprising: a sewing machine support part capable of supporting the sewing machine; a head arm lifting device which is arranged on the fixed frame of the sewing machine supporting part and can make the sewing head of the sewing machine move up and down; an X-axis and Y-axis transfer mechanism mounted on the sewing machine support part for moving the sewing object fixing part along the left-right or front-back direction; the sewing machine drives an upper shaft and a lower shaft respectively, and the sewing head has a plurality of needle bars to perform a continuous double-thread sewing operation, wherein the sewing machine comprises: a needle bar rotation driving mechanism for driving the needle bar to rotate; the rotating shuttle seat rotating driving mechanism can drive the rotating shuttle linked with the needle rod to rotate; and a needle switching device capable of selectively driving the plurality of needle bars reciprocating in the up-down direction,
wherein,
the needle switching device includes: a needle bar lifting member, one side of which is installed on the upper shaft of the sewing machine; a rotating block installed at the outer side of the needle bar and combined with the other side of the needle bar lifting member; a clutch lever unit installed at one side of the rotating block and selectively controlling the plurality of needle bars moving up and down; and a clutch lever control mechanism installed at the other side of the rotating block and capable of controlling the operation of the clutch lever unit.
2. The double needle switching pattern sewing machine according to claim 1,
the needle bar rotary drive mechanism includes: a driven pulley mounted on an outer side of the needle bar; a synchronous belt, one side of which is mounted on the driven pulley; a driving pulley on which the other side of the synchronous belt is mounted; and a needle bar rotation driving motor for driving the driving pulley to rotate.
3. The double needle switching pattern sewing machine according to claim 1,
the rotating shuttle seat rotation driving mechanism comprises: a rotating shuttle seat, on which the rotating shuttle is arranged; a first pulley installed at one side of the rotating shuttle seat; a rotation drive belt having one side mounted on the first pulley; a second pulley on which the other side of the rotation driving belt is mounted; and a rotating shuttle seat rotating drive motor for driving the second pulley to rotate.
4. The double needle switching pattern sewing machine according to claim 1,
the above clutch lever unit includes: a slider located outside the needle bars, one side of the slider being fixed to the rotating block and allowing the plurality of needle bars to slide; a plurality of clutch levers, one side of which is hinged on the sliding block and rotates around the hinged part under the control of the clutch lever control mechanism; and a plurality of lower fixing pins coupled to lower portions of the plurality of clutch levers, and engaged with the clutch levers to clamp or separate the clutch grooves on one side of the needle bars, thereby controlling the vertical movement of the plurality of needle bars.
5. The double needle switching pattern sewing machine according to claim 1,
the clutch lever control mechanism described above is an actuator.
6. The double needle switching pattern sewing machine according to claim 5,
the upper part of the actuator is provided with a clutch block which can control the rotation of the clutch rod.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080087853A KR101040666B1 (en) | 2008-09-05 | 2008-09-05 | Pattern sewing machine having with two needle stalk |
| KR10-2008-0087853 | 2008-09-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101845718A CN101845718A (en) | 2010-09-29 |
| CN101845718B true CN101845718B (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101683480A Expired - Fee Related CN101845718B (en) | 2008-09-05 | 2009-08-27 | Two-needle stem pattern sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101040666B1 (en) |
| CN (1) | CN101845718B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011120435A1 (en) * | 2010-12-08 | 2012-06-14 | Sunstar Co, Ltd | Sewing machine and method for controlling its operation |
| JP5859248B2 (en) * | 2011-08-31 | 2016-02-10 | Juki株式会社 | Double needle sewing machine |
| KR101949888B1 (en) * | 2011-11-14 | 2019-02-19 | 썬스타 주식회사 | SEWING MACHINE and needle switching device therefor |
| WO2013073830A1 (en) * | 2011-11-14 | 2013-05-23 | 주식회사 썬스타 | Sewing machine and needle-switching device adapted therefor |
| JP5859302B2 (en) * | 2011-12-26 | 2016-02-10 | Juki株式会社 | sewing machine |
| CN103382629A (en) * | 2012-05-02 | 2013-11-06 | 东莞市嘉龙皮革机械有限公司 | Independent driving and synchronous rotating mechanism of machine head and shuttle race frame |
| CN103194866B (en) * | 2013-04-08 | 2014-10-15 | 东莞市名菱工业自动化科技有限公司 | Synchronous rotating mechanism for shuttle race |
| CN103361899B (en) * | 2013-07-12 | 2014-05-21 | 宁波舒普机电科技有限公司 | Multi-needle bar module for sewing machine |
| CN104988677A (en) * | 2015-07-24 | 2015-10-21 | 宁波高新区宁源科技服务有限公司 | Multi-color embroidery machine embroidery needle mechanism |
| CN106637704A (en) * | 2015-11-04 | 2017-05-10 | 天津宝盈电脑机械有限公司 | Double-end arm type liftable sewing machine structure |
| CN108589080A (en) * | 2018-07-17 | 2018-09-28 | 张章生 | A kind of sewing machine and its shank rotation Zhi Qu mechanisms |
| CN111118745A (en) * | 2018-11-01 | 2020-05-08 | 天津宝盈电脑机械有限公司 | Bidirectional normal stitch full-automatic template sewing machine |
| CN110438680B (en) * | 2019-08-14 | 2024-03-08 | 浙江爱柯美缝纫机有限公司 | Reinforcing seam changing mechanism of household sewing machine |
| CN110409065B (en) * | 2019-08-22 | 2021-08-31 | 上海鲍麦克斯电子科技有限公司 | Industrial sewing machine control system and method |
| CN111270428A (en) * | 2020-03-19 | 2020-06-12 | 深圳市宜荣科技有限公司 | Automatic sewing machine with movable sewing machine head |
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- 2008-09-05 KR KR1020080087853A patent/KR101040666B1/en active IP Right Grant
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| GB1169818A (en) * | 1966-11-01 | 1969-11-05 | Bunsaku Taketomi | Improvements in Fancy Stitching Sewing Machines |
| US4048932A (en) * | 1976-02-17 | 1977-09-20 | The Singer Company | Bight stop mechanism for sewing machines |
| CN1576431A (en) * | 2003-07-02 | 2005-02-09 | 日星产业缝裁株式会社 | Sewing machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101845718A (en) | 2010-09-29 |
| KR101040666B1 (en) | 2011-06-13 |
| KR20100028904A (en) | 2010-03-15 |
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