US20020134289A1 - Automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine - Google Patents
Automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine Download PDFInfo
- Publication number
- US20020134289A1 US20020134289A1 US09/816,343 US81634301A US2002134289A1 US 20020134289 A1 US20020134289 A1 US 20020134289A1 US 81634301 A US81634301 A US 81634301A US 2002134289 A1 US2002134289 A1 US 2002134289A1
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- US
- United States
- Prior art keywords
- lower thread
- thread
- bobbin
- hook
- sewing machine
- 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
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- 238000009958 sewing Methods 0.000 title claims abstract description 58
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/22—Loop takers, e.g. loopers for lock-stitch sewing machines with spool-size bobbin for lower thread
Definitions
- the invention relates to an automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine, and more particularly to an apparatus that can provide the lower thread from outsides of the sewing machine and keep feeding the lower thread without frequently replacing the bobbin.
- a sewing machine utilizes a sewing method different from a hand-made sewing operation.
- the hand-made operation applies a sewing needle introducing a single sewing thread to pierce reciprocally upon a work piece.
- the conventional sewing machine utilizes a sewing needle and two sewing threads.
- one sewing thread (say, lower thread) )is placed under the work piece and the other (say, upper thread) is placed upon the work piece.
- the sewing needle is used to pull the upper sewing thread downward to penetrate the work piece, further to net the upper thread with the lower thread through a hook under the work piece, and to pull the upper sewing upward back to an upper position over the work piece.
- the work piece is fed by a predetermined displacement for another sewing cycle.
- the sewing machine can sew two work pieces together.
- the upper thread is introduced to the sewing needle directly from a reel outside the sewing machine and the lower thread is provided from a bobbin mounted inside a center of the hook.
- FIG. 1 and FIG. 2 exploded perspective views upon a conventional lower thread-supplying apparatus and a sewing needle are present.
- the sewing needle 1 and the hook 2 are displaced upon and below a needle plate 3 , respectively.
- the work piece (not shown in figures) is moved back and forth upon the needle plate 3 .
- the upper thread 11 outside the sewing machine is introduced to the sewing needle 1 through a center hole thereof, in which the sewing needle 1 is driven up and down by the machine. While in the sewing operation, the lower thread 11 is pulled to go through a thread aperture 31 of the work piece along with the sewing needle 1 , and is netted with the lower thread 51 at the hook 2 .
- the lower thread 11 is pulled back by the sewing needle 1 to the original upper position above the work piece. If a second sewing is required, the work piece will make a predetermined displacement and proceed the following sewing.
- the hook 2 is installed to a lower shaft 4 which is driven by a spindle (not shown in figures) through a transmission gear 41 .
- rotation of the lower shaft 4 is corresponding to the linear motion of the sewing needle 1 which is also driven by the spindle.
- the hook 2 of FIG. 1 is further exploded.
- the hook 2 includes a bobbin 22 and a bobbin case 21 .
- the lower thread 51 is wound around the bobbin 22 .
- a bobbin filled with thread 5 is then mounted into the hook 2 , and covered by a bobbin case 21 as shown in FIG. 1.
- the combination of the hook 2 can then be used in a sewing operation. Nevertheless, a major disadvantage of the aforesaid conventional sewing machine is limited capacity of providing lower thread 51 .
- the conventional lower thread-supplying apparatus can only supply a limited length of the lower thread 11 .
- the bobbin 22 with a diameter of 2 to 3 cm can provide 20 to 30 yards of a normal lower thread 11 with 20 lines. That is to say, the respective work piece can only be continuously sewed for a distance of 20 to 30 yards. After that, a shutdown of the sewing machine to proceed a replacement of a bobbin filled with thread 5 is required.
- the upper thread 11 is provided by a reel located outside the sewing machine.
- the industrial sewing machine usually uses a two-pound reel. In the case that a thread of 20 lines is used as the upper thread 11 , the 2-pound reel can provide a thread of 16,800 yards long. Unlike the application of the lower thread 51 , the upper thread 11 can be continuously used for months without any replacement.
- the automatic non-bobbin lower thread-supplying apparatus is simply structured, in which the conventional bobbin is abandoned and the lower shaft is bored to provide an interior concentric passage that can allow the lower thread to pass the central aperture of lower shaft from the outsides and to leave the shaft from a right side of the transmission gear.
- the lower thread provided from the central aperture of lower shaft can then be introduced to the center of the hook for replacing the conventional lower thread that is used to wind around a bobbin inside the hook.
- the lower thread can be supplied from a reel located outside the sewing machine so that frequently replacing the bobbin in the conventional sewing machine can be avoided.
- FIG. 1 is an exploded perspective view showing the relationship between a lower thread-supplying apparatus and a sewing needle for a conventional sewing machine;
- FIG. 2 is a further exploded perspective view of the lower thread-supplying apparatus of FIG. 1;
- FIG. 3 is an exploded perspective view of a preferred lower thread-supplying apparatus in accordance with the present invention.
- FIG. 4 is a schematic view of a preferred lead thread hook in accordance with the present invention.
- the invention disclosed herein is directed to an automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine.
- numerous details are set forth in order to provide a thorough understanding of the present invention. It will be appreciated by one skilled in the art that variations of these specific details are possible while still achieving the results of the present invention. In other instance, well-known components are not described in detail in order not to unnecessarily obscure the present invention.
- FIG. 3 a preferred lower thread-supplying apparatus in accordance with the present invention is illustrated.
- the lower shaft 4 is bored to provide a throughout center aperture 42 for allowing the lower thread to be introduced through a center hole of the transmission gear 41 into a center of the hook 2 .
- the conventional bobbin 22 for winding the lower thread is substituted.
- a thread conduit 6 is provided at an appropriate location adjacent to the transmission gear 41 , for leading the lower thread from an outside reel (not shown in figures) to the center hole of transmission gear 41 .
- the present invention keeps the bobbin case 21 but get rid of the bobbin 22 , so that the interior of the hook 2 can be still isolated from the outside particles or objects.
- the lead thread hook 7 for leading the lower thread is shown.
- the lead thread hook 7 can be made of flexible steel wire and include a ring 71 at one end (front end) thereof and a thread aperture 72 at another end (rear end) thereof. Because the lower shaft 4 of industrial sewing machine has a substantial length, it is not an easy job to lead the lower thread all the way directly from the transmission gear 41 to the center of the hook 2 . Yet, by providing the lead thread hook 7 , the difficulty in leading the lower thread can be relieved. While introducing the lower thread, the lead thread hook 7 is placed to penetrate the center aperture 42 of the lower shaft 4 from the center of the hook 2 to the center of the transmission gear 41 .
- one end of the lower thread can be anchored inside the thread aperture 72 .
Abstract
An automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine is introduced to resolve a limited lower thread-supply problem on a conventional bobbin of hook, which the problem will lead to frequent work on replacing the bobbin during a sewing operation and obviously is both time-consuming and quality-reducing. In the present invention, the conventional bobbin is abandoned by providing a throughout center aperture to a lower shaft that drives the hook. The center aperture forms a passage for the lower thread from a center hole of a transmission gear at one end of the lower shaft to the center of hook at another end thereof. By providing the center aperture of the lower shaft, the lower thread can be introduced from outsides of the sewing machine and directly supplied to the hook without frequently replacing the bobbin during the sewing operation.
Description
- (1) Field of the Invention
- The invention relates to an automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine, and more particularly to an apparatus that can provide the lower thread from outsides of the sewing machine and keep feeding the lower thread without frequently replacing the bobbin.
- (2) Description of the Prior Art
- It is well known in the art that a sewing machine utilizes a sewing method different from a hand-made sewing operation. The hand-made operation applies a sewing needle introducing a single sewing thread to pierce reciprocally upon a work piece. On the other hand, the conventional sewing machine utilizes a sewing needle and two sewing threads. In the machine sewing, one sewing thread (say, lower thread) )is placed under the work piece and the other (say, upper thread) is placed upon the work piece. The sewing needle is used to pull the upper sewing thread downward to penetrate the work piece, further to net the upper thread with the lower thread through a hook under the work piece, and to pull the upper sewing upward back to an upper position over the work piece. Then, the work piece is fed by a predetermined displacement for another sewing cycle. By repeating aforesaid sewing cycles, the sewing machine can sew two work pieces together. It is noted that the upper thread is introduced to the sewing needle directly from a reel outside the sewing machine and the lower thread is provided from a bobbin mounted inside a center of the hook. For a clear understanding about the aforesaid sewing method, a detail description upon the conventional method of introducing the lower thread as well as accompanying disadvantages thereof is present as follows.
- Referring to FIG.1 and FIG.2, exploded perspective views upon a conventional lower thread-supplying apparatus and a sewing needle are present. As shown, the sewing needle 1 and the
hook 2 are displaced upon and below a needle plate 3, respectively. The work piece (not shown in figures) is moved back and forth upon the needle plate 3. The upper thread 11 outside the sewing machine is introduced to the sewing needle 1 through a center hole thereof, in which the sewing needle 1 is driven up and down by the machine. While in the sewing operation, the lower thread 11 is pulled to go through athread aperture 31 of the work piece along with the sewing needle 1, and is netted with thelower thread 51 at thehook 2. Then, the lower thread 11 is pulled back by the sewing needle 1 to the original upper position above the work piece. If a second sewing is required, the work piece will make a predetermined displacement and proceed the following sewing. In the conventional sewing machine, thehook 2 is installed to alower shaft 4 which is driven by a spindle (not shown in figures) through atransmission gear 41. In a sewing operation, rotation of thelower shaft 4 is corresponding to the linear motion of the sewing needle 1 which is also driven by the spindle. Upon such an arrangement and by providing the configuration of thehook 2, thelower thread 51 and the upper thread 11 can be netted. - In FIG. 2, the
hook 2 of FIG. 1 is further exploded. As shown, thehook 2 includes abobbin 22 and abobbin case 21. While in use, thelower thread 51 is wound around thebobbin 22. It is interesting to aware that thelower thread 51 is named due to its location under the work piece. A bobbin filled with thread 5 is then mounted into thehook 2, and covered by abobbin case 21 as shown in FIG. 1. The combination of thehook 2 can then be used in a sewing operation. Nevertheless, a major disadvantage of the aforesaid conventional sewing machine is limited capacity of providinglower thread 51. As described above, thelower thread 51 is wound on thebobbin 22 and thebobbin 22 is further located to a limited room inside thehook 2. Therefore, it can be foreseen that the conventional lower thread-supplying apparatus can only supply a limited length of the lower thread 11. For example, thebobbin 22 with a diameter of 2 to 3 cm can provide 20 to 30 yards of a normal lower thread 11 with 20 lines. That is to say, the respective work piece can only be continuously sewed for a distance of 20 to 30 yards. After that, a shutdown of the sewing machine to proceed a replacement of a bobbin filled with thread 5 is required. It is obvious that such a replacement work is labor-consuming and a substantial length of the lower thread 51 (odd piece) will be wasted while replacing thebobbin 22. It is equivocal to manage theodd piece 51. Some operators will cut theodd piece 51 off, but it is quite possible to introduce an escaping thread in the sewing. On the other hand, some operators will leave theodd piece 51 there, but lead to an ugly appearance which is usually seen on a new clothes. Contrary to thelower thread 51, the upper thread 11 is provided by a reel located outside the sewing machine. Generally, the industrial sewing machine usually uses a two-pound reel. In the case that a thread of 20 lines is used as the upper thread 11, the 2-pound reel can provide a thread of 16,800 yards long. Unlike the application of thelower thread 51, the upper thread 11 can be continuously used for months without any replacement. - Accordingly, it is a primary object of the present invention to provide an automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine which can resolve the aforesaid limited-length problem of the conventional lower thread-supplying apparatus.
- In the present invention, the automatic non-bobbin lower thread-supplying apparatus is simply structured, in which the conventional bobbin is abandoned and the lower shaft is bored to provide an interior concentric passage that can allow the lower thread to pass the central aperture of lower shaft from the outsides and to leave the shaft from a right side of the transmission gear. The lower thread provided from the central aperture of lower shaft can then be introduced to the center of the hook for replacing the conventional lower thread that is used to wind around a bobbin inside the hook. By providing the present invention, the lower thread can be supplied from a reel located outside the sewing machine so that frequently replacing the bobbin in the conventional sewing machine can be avoided.
- All these objects are achieved by the automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine described below.
- The present invention will now be specified with reference to its preferred embodiment illustrated in the drawings, in which
- FIG. 1 is an exploded perspective view showing the relationship between a lower thread-supplying apparatus and a sewing needle for a conventional sewing machine;
- FIG. 2 is a further exploded perspective view of the lower thread-supplying apparatus of FIG. 1;
- FIG. 3 is an exploded perspective view of a preferred lower thread-supplying apparatus in accordance with the present invention; and
- FIG. 4 is a schematic view of a preferred lead thread hook in accordance with the present invention.
- The invention disclosed herein is directed to an automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine. In the following description, numerous details are set forth in order to provide a thorough understanding of the present invention. It will be appreciated by one skilled in the art that variations of these specific details are possible while still achieving the results of the present invention. In other instance, well-known components are not described in detail in order not to unnecessarily obscure the present invention.
- Referring now to FIG. 3, a preferred lower thread-supplying apparatus in accordance with the present invention is illustrated. As shown, the
lower shaft 4 is bored to provide a throughoutcenter aperture 42 for allowing the lower thread to be introduced through a center hole of thetransmission gear 41 into a center of thehook 2. Thereby, theconventional bobbin 22 for winding the lower thread is substituted. To prevent the introducing of the lower thread from interfering with other components of the sewing machine, athread conduit 6 is provided at an appropriate location adjacent to thetransmission gear 41, for leading the lower thread from an outside reel (not shown in figures) to the center hole oftransmission gear 41. Obviously, the present invention keeps thebobbin case 21 but get rid of thebobbin 22, so that the interior of thehook 2 can be still isolated from the outside particles or objects. - Referring now to FIG. 4, a lead thread hook7 for leading the lower thread is shown. The lead thread hook 7 can be made of flexible steel wire and include a
ring 71 at one end (front end) thereof and athread aperture 72 at another end (rear end) thereof. Because thelower shaft 4 of industrial sewing machine has a substantial length, it is not an easy job to lead the lower thread all the way directly from thetransmission gear 41 to the center of thehook 2. Yet, by providing the lead thread hook 7, the difficulty in leading the lower thread can be relieved. While introducing the lower thread, the lead thread hook 7 is placed to penetrate thecenter aperture 42 of thelower shaft 4 from the center of thehook 2 to the center of thetransmission gear 41. Then, one end of the lower thread can be anchored inside thethread aperture 72. After the lead thread hook 7 is pulled out thelower shaft 4 by thering 71 at thehook 2, the lower thread along with thethread aperture 72 can be easily pulled to the center of thehook 2. - By providing the present invention, though the structure thereof is simple, yet a substantial amount of laboring can be saved, the production can be increased, and the notorious problem of odd piece can be resolved.
- While the present invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be without departing from the spirit and scope of the present invention.
Claims (1)
1. An automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine, characterized in that a throughout center aperture for allowing a thread to pass therebythrough is provided to a lower shaft of the sewing machine, in which the center aperture connects a center of a hook of the sewing machine with a center hole of a transmission gear of the sewing machine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/816,343 US20020134289A1 (en) | 2001-03-26 | 2001-03-26 | Automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/816,343 US20020134289A1 (en) | 2001-03-26 | 2001-03-26 | Automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine |
Publications (1)
Publication Number | Publication Date |
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US20020134289A1 true US20020134289A1 (en) | 2002-09-26 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/816,343 Abandoned US20020134289A1 (en) | 2001-03-26 | 2001-03-26 | Automatic non-bobbin lower thread-supplying apparatus for industrial sewing machine |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005098120A1 (en) * | 2003-07-16 | 2005-10-20 | Shih Chang Chien | Shuttle-thread guiding mechanism in sewing machine |
CN102808296A (en) * | 2012-08-30 | 2012-12-05 | 陈展新 | Crank rocker type rotating shuttle drive mechanism used for embroidery machine |
-
2001
- 2001-03-26 US US09/816,343 patent/US20020134289A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005098120A1 (en) * | 2003-07-16 | 2005-10-20 | Shih Chang Chien | Shuttle-thread guiding mechanism in sewing machine |
CN102808296A (en) * | 2012-08-30 | 2012-12-05 | 陈展新 | Crank rocker type rotating shuttle drive mechanism used for embroidery machine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |