EP2828428B1 - Sewing machine with operation control devices - Google Patents
Sewing machine with operation control devices Download PDFInfo
- Publication number
- EP2828428B1 EP2828428B1 EP13731877.0A EP13731877A EP2828428B1 EP 2828428 B1 EP2828428 B1 EP 2828428B1 EP 13731877 A EP13731877 A EP 13731877A EP 2828428 B1 EP2828428 B1 EP 2828428B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- encoder
- drive wheel
- motion
- auxiliary
- 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.)
- Active
Links
- 238000009958 sewing Methods 0.000 title claims description 42
- 239000004744 fabric Substances 0.000 claims description 25
- 230000033001 locomotion Effects 0.000 claims description 25
- 230000010355 oscillation Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/14—Devices for changing speed or for reversing direction of rotation
Definitions
- the present patent concerns the sector of sewing machines and in particular it concerns a new sewing machine with new operation control devices.
- Sewing machines which comprise at least one main shaft, an electric motor suited to rotate said main shaft axially, a vertical rod connected to said main shaft through transmission members, and wherein a needle suited to perforate the fabric to be sewn is constrained to the lower end of said vertical rod.
- Said vertical rod, or needle-holding rod performs an alternating movement from bottom to top and vice versa, which is transmitted by means of cams, and an oscillating motion in the direction of advance of the fabric, with variable period according to said advance speed, in order to prevent the tip of the needle from breaking or the fabric from getting damaged during the sewing operation.
- the sewing machines of the known type also comprise at least one drive wheel, positioned under the sewing surface, suited to cause the fabric to advance, and wherein said drive wheel is also set rotating by said electric motor, being mechanically connected to said main shaft.
- the known sewing machines are also provided with a presser foot that is positioned over said sewing surface and is suited to press the fabric against said lower drive wheel.
- Roller feet are also known, meaning feet comprising a roller positioned over the sewing surface and rotating in the advance direction of the fabric, in order to favour the forward feeding of the fabric.
- said drive wheel performs a driving movement in two directions, both forwards and backwards, and analogously said vertical needle-holding rod can reverse its oscillating motion in a way that corresponds to the rotation direction of said drive wheel.
- Sewing machines are also known in which said roller foot is in turn connected to a rotation reversal device, so that said roller of the foot reverses the rotation direction in a way that corresponds to the reversal of the rotation of said lower drive wheel.
- the oscillation and alternating translation period of said needle-holding rod is always determined according to the rotation speed of said lower wheel and of said roller, said components being all mechanically connected to the same motor.
- a limitation of the sewing machines of the known type described above lies in that, with very thick fabrics or other thick and curved materials, said parameters regarding the speed of the lower wheel and of the upper roller and the oscillation and alternating translation period of the rod, on the other hand, should be able to be modulated in an independent manner, in such a way as to guarantee the correct sliding movement of the fabric without curling or deforming it in any way.
- US-A-5660129 relates to a sewing machine comprising a needle bar, a needle bar drive motor, a hook, a hook drive motor, a speed detector which detects a rotation speed of the needle-bar drive motor and a control device which controls the hook drive motor, so that the hook is rotated in synchronism with the needle bar.
- the main object of the present invention is to provide a sewing machine in which it is possible to independently control all the operating parameters, such as the speed and rotation direction of the lower drive wheel and of the roller of the upper presser foot, as well as the oscillation period of the needle-holding rod, according to the kind of sewing operation to be carried out.
- the new machine comprises also:
- said encoder detects the motion of said cam, which defines the oscillation period of said rod, meaning the length of the sewing stitch to be made.
- said auxiliary electronic board activates said auxiliary motor by adjusting its number of steps, meaning the rotation speed of said lower drive wheel and of said upper foot roller.
- said auxiliary electronic board controls the operation of the step-by-step motor.
- said auxiliary electronic board following a signal sent by the main electronic board of the machine, which controls the rod reversal magnet, can correspondingly reverse also the rotation direction of said auxiliary motor and thus of the lower wheel and of said upper roller, through said auxiliary motor, for the automatic reverse stitching operation at the beginning and at the end of the sewing cycle.
- Figure 1 schematically shows the operation of the new sewing machine.
- the figure shows a new sewing machine (1) comprising a sewing surface (2) on which the fabric or material in general to be processed slides.
- the new sewing machine (1) comprises a main driving shaft (3) and a vertical needle-holding rod (4), mechanically connected to said main shaft (3) and having at least one needle (5) installed at its lower free end (41).
- Said main shaft (3) is in turn mechanically connected to a main motor (8) suited to rotate said main shaft (3) axially in order to provide for moving said vertical needle-holding rod (4).
- Said vertical rod (4) is connected to said main shaft (3) through transmission members (42), like for example a connecting rod, such that said vertical rod (4) performs an alternating translational movement in the axial direction.
- said vertical rod (4) is connected to said main shaft (3) through further transmission members, like for example at least one cam (43), so that said vertical rod (4) performs also an oscillating movement, and wherein said oscillating movement of said rod (4) can be reversed according to the advance direction of the fabric to be sewn, through a magnet (44), following the signal of a main electronic board (12) connected to the magnet (44) itself.
- further transmission members like for example at least one cam (43)
- the new machine (1) also comprises at least one lower drive wheel (6), positioned under said sewing surface (2) and suited to favour the feeding of the fabric in one direction, in both senses.
- the new machine (1) also comprises at least one presser foot (7) with at least one drive roller (71) positioned over said sewing surface (2) and suited to favour the feeding of the fabric, and wherein also said roller (71) rotates in both senses.
- the new machine (1) also comprises at least one further auxiliary motor (9), preferably of the step-by-step type, mechanically connected, through transmission members (91), to said lower drive wheel (6) and to said roller (71) of the upper presser foot (7) in order to set them rotating and thus cause the fabric to be fed forwards.
- at least one further auxiliary motor (9) preferably of the step-by-step type, mechanically connected, through transmission members (91), to said lower drive wheel (6) and to said roller (71) of the upper presser foot (7) in order to set them rotating and thus cause the fabric to be fed forwards.
- the new machine (1) comprises also an encoder (10) mechanically connected to said cam (43) for the oscillation of said needle-holding rod (4), in order to detect the motion of said cam (43).
- the new sewing machine (1) comprises also an auxiliary electronic board (11), in turn connected to said auxiliary motor (9).
- Said auxiliary electronic board (11) is also connected to said encoder (10), in order to process the collected data, wherein, according to said data of the encoder (10), said auxiliary electronic board (11) is suited to activate said auxiliary motor (9) controlling its number of steps according to the motion of said cam (43), in turn connected to said encoder (10).
- Said auxiliary electronic board (11) can also reverse the rotation direction of said auxiliary motor (9) and thus of said lower wheel (6) and of said upper roller (71). Therefore, with reference to the above description and to the attached drawing, the following claims are expressed.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sewing Machines And Sewing (AREA)
Description
- The present patent concerns the sector of sewing machines and in particular it concerns a new sewing machine with new operation control devices.
- Sewing machines are known which comprise at least one main shaft, an electric motor suited to rotate said main shaft axially, a vertical rod connected to said main shaft through transmission members, and wherein a needle suited to perforate the fabric to be sewn is constrained to the lower end of said vertical rod.
- Said vertical rod, or needle-holding rod, performs an alternating movement from bottom to top and vice versa, which is transmitted by means of cams, and an oscillating motion in the direction of advance of the fabric, with variable period according to said advance speed, in order to prevent the tip of the needle from breaking or the fabric from getting damaged during the sewing operation.
- The sewing machines of the known type also comprise at least one drive wheel, positioned under the sewing surface, suited to cause the fabric to advance, and wherein said drive wheel is also set rotating by said electric motor, being mechanically connected to said main shaft.
- In order to guarantee that the fabric is correctly fed, the known sewing machines are also provided with a presser foot that is positioned over said sewing surface and is suited to press the fabric against said lower drive wheel.
- Roller feet are also known, meaning feet comprising a roller positioned over the sewing surface and rotating in the advance direction of the fabric, in order to favour the forward feeding of the fabric.
- In order to allow the reverse stitching to be performed, it is necessary that, at the end of the sewing operation, the fabric is driven backwards, so that some further final stitches can be made. For this purpose, said drive wheel performs a driving movement in two directions, both forwards and backwards, and analogously said vertical needle-holding rod can reverse its oscillating motion in a way that corresponds to the rotation direction of said drive wheel.
- Sewing machines are also known in which said roller foot is in turn connected to a rotation reversal device, so that said roller of the foot reverses the rotation direction in a way that corresponds to the reversal of the rotation of said lower drive wheel.
- The oscillation and alternating translation period of said needle-holding rod is always determined according to the rotation speed of said lower wheel and of said roller, said components being all mechanically connected to the same motor.
- A limitation of the sewing machines of the known type described above lies in that, with very thick fabrics or other thick and curved materials, said parameters regarding the speed of the lower wheel and of the upper roller and the oscillation and alternating translation period of the rod, on the other hand, should be able to be modulated in an independent manner, in such a way as to guarantee the correct sliding movement of the fabric without curling or deforming it in any way.
-
US-A-5660129 relates to a sewing machine comprising a needle bar, a needle bar drive motor, a hook, a hook drive motor, a speed detector which detects a rotation speed of the needle-bar drive motor and a control device which controls the hook drive motor, so that the hook is rotated in synchronism with the needle bar. - In order to overcome all the drawbacks described above, a new type of sewing machine with new operation control devices has been designed and manufactured.
- The main object of the present invention is to provide a sewing machine in which it is possible to independently control all the operating parameters, such as the speed and rotation direction of the lower drive wheel and of the roller of the upper presser foot, as well as the oscillation period of the needle-holding rod, according to the kind of sewing operation to be carried out.
- It is another object of the present invention to provide a sewing machine that allows said operating parameters to be modulated in a programmed and automatic way, depending on the sewing operation to be carried out.
- These and other direct and complementary objects are achieved by the new sewing machine with operation control devices, whose main parts comprise:
- a sewing surface, on which the fabric or material in general to be processed slides;
- at least one main driving shaft;
- at least one vertical rod, connected to said main shaft through at least one connecting rod, such that said vertical rod performs an alternating translational motion in the axial direction, and through at least one cam, such that said vertical rod performs also an oscillating motion in the advance direction of the fabric;
- at least one device suited to reverse said oscillating motion of said rod, said reversal device comprising, for example, at least one magnet;
- at least one needle positioned at the lower end of said vertical rod;
- at least one lower drive wheel, positioned under said sewing surface and suited to favour the feeding of the fabric;
- at least one presser foot with at least one drive roller, placed over said sewing surface and suited to favour the feeding of the fabric;
- at least one main motor connected to said main driving shaft that moves said vertical rod;
- at least one main electronic board equipped with control keyboard or buttons.
- The new machine comprises also:
- at least one further auxiliary motor, preferably of the step-by-step type, mechanically connected, through transmission members, to said lower drive wheel and to said upper foot roller in order to set them rotating;
- at least one encoder, mechanically connected to said cam for the oscillation of said needle-holding rod in order to detect the motion of said cam itself;
- at least one auxiliary electronic board communicating with said encoder and with said auxiliary motor,
- Therefore, said encoder detects the motion of said cam, which defines the oscillation period of said rod, meaning the length of the sewing stitch to be made. According to said data collected by said encoder, said auxiliary electronic board activates said auxiliary motor by adjusting its number of steps, meaning the rotation speed of said lower drive wheel and of said upper foot roller.
- In this way it is possible to adjust the feeding speed of the fabric according to the length of the sewing stitch to be carried out.
- Therefore, said auxiliary electronic board, according to the data received from the encoder, controls the operation of the step-by-step motor.
- Furthermore, said auxiliary electronic board, following a signal sent by the main electronic board of the machine, which controls the rod reversal magnet, can correspondingly reverse also the rotation direction of said auxiliary motor and thus of the lower wheel and of said upper roller, through said auxiliary motor, for the automatic reverse stitching operation at the beginning and at the end of the sewing cycle.
- The characteristics of the new sewing machine will be highlighted in greater detail in the following description, with reference to the attached drawing that is enclosed by way of non-limiting example.
-
Figure 1 schematically shows the operation of the new sewing machine. - The figure shows a new sewing machine (1) comprising a sewing surface (2) on which the fabric or material in general to be processed slides. The new sewing machine (1) comprises a main driving shaft (3) and a vertical needle-holding rod (4), mechanically connected to said main shaft (3) and having at least one needle (5) installed at its lower free end (41).
- Said main shaft (3) is in turn mechanically connected to a main motor (8) suited to rotate said main shaft (3) axially in order to provide for moving said vertical needle-holding rod (4).
- Said vertical rod (4), in particular, is connected to said main shaft (3) through transmission members (42), like for example a connecting rod, such that said vertical rod (4) performs an alternating translational movement in the axial direction.
- Furthermore, said vertical rod (4) is connected to said main shaft (3) through further transmission members, like for example at least one cam (43), so that said vertical rod (4) performs also an oscillating movement, and wherein said oscillating movement of said rod (4) can be reversed according to the advance direction of the fabric to be sewn, through a magnet (44), following the signal of a main electronic board (12) connected to the magnet (44) itself.
- The new machine (1) also comprises at least one lower drive wheel (6), positioned under said sewing surface (2) and suited to favour the feeding of the fabric in one direction, in both senses.
- The new machine (1) also comprises at least one presser foot (7) with at least one drive roller (71) positioned over said sewing surface (2) and suited to favour the feeding of the fabric, and wherein also said roller (71) rotates in both senses.
- The new machine (1) also comprises at least one further auxiliary motor (9), preferably of the step-by-step type, mechanically connected, through transmission members (91), to said lower drive wheel (6) and to said roller (71) of the upper presser foot (7) in order to set them rotating and thus cause the fabric to be fed forwards.
- The new machine (1) comprises also an encoder (10) mechanically connected to said cam (43) for the oscillation of said needle-holding rod (4), in order to detect the motion of said cam (43).
- The new sewing machine (1) comprises also an auxiliary electronic board (11), in turn connected to said auxiliary motor (9).
- Said auxiliary electronic board (11) is also connected to said encoder (10), in order to process the collected data, wherein, according to said data of the encoder (10), said auxiliary electronic board (11) is suited to activate said auxiliary motor (9) controlling its number of steps according to the motion of said cam (43), in turn connected to said encoder (10).
- Said auxiliary electronic board (11) can also reverse the rotation direction of said auxiliary motor (9) and thus of said lower wheel (6) and of said upper roller (71). Therefore, with reference to the above description and to the attached drawing, the following claims are expressed.
Claims (5)
- Sewing machine (1) comprising a sewing surface (2) on which the fabric or material in general to be processed slides, at least one main driving shaft (3), at least one vertical needle-holding rod (4), mechanically connected to said main shaft (3) through mechanical members (42, 43) for the transmission of an alternating axial translational motion and of an oscillating motion, at least one needle (5) mounted at the lower free end (41) of said vertical needle-holding rod (4), at least one main motor (8) suited to rotate said main shaft (3) axially in order to move said vertical rod (4), at least one lower drive wheel (6) positioned under said sewing surface (2) and suited to favour the feeding of the fabric, at least one presser foot (7) with at least one drive roller (71) placed over said sewing surface (2) and suited to favour the feeding of the fabric, characterized in that it also comprises:• at least one further auxiliary motor (9) mechanically connected to said lower drive wheel (6) and to said roller (71) of the upper presser foot (7) to set them rotating;• at least one encoder (10) mechanically connected to at least one cam (43) for the oscillation of said needle-holding rod (4), said encoder (10) being suited to detect the motion of said cam (43), that is, of said rod (4);• at least one auxiliary electronic board (11) communicating with said encoder (10), suited to process the data received from the encoder (10) and connected at least to said auxiliary motor (9),
and wherein said auxiliary electronic board (11) activates said auxiliary motor (9) to modulate the speed and/or the rotation direction of said drive wheel (6) and of said upper roller (71) according to the motion of said needle-holding rod (4). - Sewing machine (1) according to claim 1, characterized in that said vertical rod (4) is connected to said main shaft (3) through mechanical members (42) in such a way that said vertical rod (4) performs an alternating translational motion in the axial direction, and through mechanical members or said cam (43), in such a way that said vertical rod (4) performs also an oscillating motion in the advance direction of the fabric, and wherein said encoder (10) is connected to said cam (43) for the oscillation of the rod (4).
- Sewing machine (1) according to any of claims 1 and 2, characterized in that said auxiliary motor (9) is a step-by-step motor, and wherein said encoder (10) detects the motion of said mechanical members (43) for the oscillation of the rod (4) and, according to said data, said auxiliary electronic board (11) activates said auxiliary motor (9) adjusting its number of steps, meaning the rotation speed of said lower drive wheel (6) and of said roller (71) of the upper presser foot (7).
- Sewing machine (1) according to any of claims 1, 2 and 3, characterized in that said auxiliary electronic board (11), through said auxiliary motor (9), can reverse the rotation direction of said lower drive wheel (6) and of said upper roller (71) according to the direction of the oscillating motion of said rod.
- Sewing machine (1) according to any of claims 1, 2, 3 and 4, characterized in that it comprises at least one main electronic board (12) connected to a device or magnet (44) for the reversal of the oscillating motion of the rod, and wherein said main board (12) sends said magnet (44) the reversal signal for the rod (4) and said auxiliary electronic board (11) the reversal signal for said lower drive wheel (6) and said upper roller (71).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RS20160223A RS54792B1 (en) | 2012-03-19 | 2013-03-12 | Sewing machine with operation control devices |
SI201330167A SI2828428T1 (en) | 2012-03-19 | 2013-03-12 | Sewing machine with operation control devices |
HRP20160304TT HRP20160304T1 (en) | 2012-03-19 | 2016-03-23 | Sewing machine with operation control devices |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000083A ITPD20120083A1 (en) | 2012-03-19 | 2012-03-19 | SEWING MACHINE WITH OPERATING CONTROL DEVICES |
PCT/IB2013/051931 WO2013140297A1 (en) | 2012-03-19 | 2013-03-12 | Sewing machine with operation control devices |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2828428A1 EP2828428A1 (en) | 2015-01-28 |
EP2828428B1 true EP2828428B1 (en) | 2016-02-03 |
Family
ID=46022553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13731877.0A Active EP2828428B1 (en) | 2012-03-19 | 2013-03-12 | Sewing machine with operation control devices |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP2828428B1 (en) |
CN (1) | CN104350193B (en) |
ES (1) | ES2568630T3 (en) |
HR (1) | HRP20160304T1 (en) |
HU (1) | HUE027351T2 (en) |
IT (1) | ITPD20120083A1 (en) |
PL (1) | PL2828428T3 (en) |
RS (1) | RS54792B1 (en) |
SI (1) | SI2828428T1 (en) |
WO (1) | WO2013140297A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4164191A (en) * | 1978-10-17 | 1979-08-14 | The Singer Company | Sewing machine motor actuated pneumatic pump for needle threading |
US5839382A (en) * | 1994-09-15 | 1998-11-24 | Tice Engineering And Sales, Inc. | Electronically geared sewing machine |
JPH08215468A (en) * | 1995-02-09 | 1996-08-27 | Brother Ind Ltd | Sewing machine |
JPH09140972A (en) * | 1995-11-20 | 1997-06-03 | Brother Ind Ltd | Sewing machine |
JP3449588B2 (en) * | 1996-03-11 | 2003-09-22 | ブラザー工業株式会社 | sewing machine |
US6135040A (en) * | 1998-09-09 | 2000-10-24 | Tice Engineering And Sales, Inc. | Felling machine |
DE10209317A1 (en) * | 2002-03-02 | 2003-09-25 | Duerkopp Adler Ag | Microprocessor-based control device for a sewing machine |
EP2312033B1 (en) * | 2009-10-13 | 2016-08-24 | JUKI Corporation | Sewing machine |
-
2012
- 2012-03-19 IT IT000083A patent/ITPD20120083A1/en unknown
-
2013
- 2013-03-12 RS RS20160223A patent/RS54792B1/en unknown
- 2013-03-12 CN CN201380015534.5A patent/CN104350193B/en not_active Expired - Fee Related
- 2013-03-12 PL PL13731877.0T patent/PL2828428T3/en unknown
- 2013-03-12 WO PCT/IB2013/051931 patent/WO2013140297A1/en active Application Filing
- 2013-03-12 ES ES13731877.0T patent/ES2568630T3/en active Active
- 2013-03-12 SI SI201330167A patent/SI2828428T1/en unknown
- 2013-03-12 EP EP13731877.0A patent/EP2828428B1/en active Active
- 2013-03-12 HU HUE13731877A patent/HUE027351T2/en unknown
-
2016
- 2016-03-23 HR HRP20160304TT patent/HRP20160304T1/en unknown
Also Published As
Publication number | Publication date |
---|---|
RS54792B1 (en) | 2016-10-31 |
WO2013140297A1 (en) | 2013-09-26 |
SI2828428T1 (en) | 2016-09-30 |
CN104350193A (en) | 2015-02-11 |
PL2828428T3 (en) | 2016-09-30 |
CN104350193B (en) | 2016-08-24 |
HUE027351T2 (en) | 2016-09-28 |
HRP20160304T1 (en) | 2016-06-17 |
EP2828428A1 (en) | 2015-01-28 |
ES2568630T3 (en) | 2016-05-03 |
ITPD20120083A1 (en) | 2013-09-20 |
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