CN101914841A - Needle position detecting mechanism of industrial sewing machine - Google Patents
Needle position detecting mechanism of industrial sewing machine Download PDFInfo
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- CN101914841A CN101914841A CN2010101276468A CN201010127646A CN101914841A CN 101914841 A CN101914841 A CN 101914841A CN 2010101276468 A CN2010101276468 A CN 2010101276468A CN 201010127646 A CN201010127646 A CN 201010127646A CN 101914841 A CN101914841 A CN 101914841A
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- sewing machine
- loophole
- shadow shield
- needle
- position detecting
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Abstract
The invention relates to a needle position detecting mechanism of an industrial sewing machine, comprising a shading plate and a needle position detecting circuit with a groove-shaped optical coupler, wherein the shading plate is arranged on needle rods of the sewing machine; the needle position detecting circuit is arranged on the nose of the sewing machine; one side of the groove-shaped optical coupler is provided with two light emitting diodes, and the other side is provided with two triodes for receiving light rays; the shading plate is parallel to the needle rods of the sewing machine and is positioned in a groove of the groove-shaped optical coupler, a first light hole and a second light hole, corresponding to the two light emitting diodes, are vertically arranged on the shading plate, the lower edge of the first light hole is higher than that of the second light hole, and the upper edge of the first light hole is higher than that of the second light hole; and the output signals of the two triodes are respectively connected to a central processing unit in a control system of the industrial sewing machine. The needle position detecting mechanism can output five signals corresponding to the positions of the needle rods of the sewing machine so as to be convenient for the central processing unit to effectively control, thereby ensuring the rapid and accurate shut-down of the sewing machine, and greatly improving the working efficiency as well as the safety and the reliability.
Description
Technical field
The present invention relates to a kind of industrial sewing machine, relate in particular to and a kind ofly obtain multiple pin position signal, be convenient to the needle position detecting mechanism of industrial sewing machine that host computer is accurately judged the needle bar of sewing machine position.
Background technology
Sewing machines in use needs to stop pin sometimes, stops pin under needing sometimes.On can easily the cloth of sewing be extracted out when stopping pin, perhaps carry out the action of automatic pipeline purging; Under when stopping pin, the cloth that needle penetration is being sewed has guaranteed that cloth can not move up and down, can rotate the cloth of sewing this moment easily, thereby can sew out different stitchings.Therefore, the upper and lower pin that stops needs accurately location, could guarantee that sewing is normal.Present industrial sewing machine is all realized by install and measure circuit on the Sewing machines handwheel the detection of Sewing needles position; this measuring method can only reflect two positions; it is the position, upper and lower pin position of Sewing machines; the pin position signal that obtains is relatively more dull; be not easy to PC control; so Sewing machines is shut down fast and accurately, influence operating efficiency.
Summary of the invention
The present invention mainly solves the position, upper and lower pin position that original pin position testing circuit that is installed on the Sewing machines handwheel can only reflect Sewing machines, the pin position signal that obtains is relatively more dull, be not easy to PC control,, influence the technical problem of operating efficiency so Sewing machines is shut down fast and accurately; Provide a kind of easy for installation, safe and reliable, can obtain multiple pin position signal, be convenient to host computer and accurately judge residing five positions of needle bar of sewing machine, make things convenient for the needle position detecting mechanism of industrial sewing machine of its control.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: the present invention includes and be located at the shadow shield on the needle bar of sewing machine and be located at pin position testing circuit on the head of sewing machine, described pin position testing circuit comprises the grooved optocoupler, one side of grooved optocoupler has two light emitting diode D1, D2, the opposite side of grooved optocoupler has two triode Q1 that receive light, Q2, described shadow shield and described needle bar of sewing machine be arranged in parallel, shadow shield is positioned at the groove of described grooved optocoupler, shadow shield is provided with two loopholes that vertically are provided with, be first loophole and second loophole, article two, the position of loophole is corresponding with the position of two light emitting diodes of grooved optocoupler respectively, described two triode Q1, the output signal of Q2 connects host computer or the CPU in the industrial sewing machine control system respectively.The grooved optocoupler is fixed on the head of sewing machine, is fixed.Shadow shield is fixed on the needle bar of sewing machine, rises along with the rising of needle bar of sewing machine, descends along with the decline of needle bar of sewing machine.Moving up and down in the process of shadow shield, when the light that sends when the light emitting diode on the grooved optocoupler was blocked by shadow shield, the triode relative with this light emitting diode do not receive light, and then this not conducting of triode does not have signal output; When the light that sends when the light emitting diode on the grooved optocoupler can pass loophole on the shadow shield, the triode relative with this light emitting diode received light, and then this triode conducting has signal output.Like this when needle bar of sewing machine moves up and down, shadow shield is also along with moving up and down, grooved light idol in the testing circuit of pin position is also just in the needle bar of sewing machine moving process, send different high-low level signals, the CPU of needle bar of sewing machine position feedback in host computer or the industrial sewing machine control system, finish the Sewing needles position and detect.Host computer or CPU just can be judged the residing position of current needle bar of sewing machine exactly by judging current a signal and a preceding signal, are convenient to host computer or CPU is effectively controlled industrial sewing machine.
As preferably, the length of first loophole of described shadow shield and the equal in length of second loophole, the length of two loopholes are all less than the last pin position extreme position of described needle bar of sewing machine and the distance between the extreme position of following pin position.Make that the upper edge of two loopholes was positioned at the below of the light emitting diode of grooved optocoupler when needle bar of sewing machine was positioned at following pin position extreme position; When needle bar of sewing machine was positioned at pin position extreme position, the lower edge of two loopholes was positioned at the top of the light emitting diode of grooved optocoupler.Guarantee whole process and finish the detection of Sewing needles position, testing result is complete, various.
As preferably, the lower edge of first loophole of described shadow shield is higher than the lower edge of second loophole, and the upper edge of first loophole also is higher than the upper edge of second loophole.The setting of just staggering of two loopholes is to obtain more kinds of Sewing needles position signals.
As preferably, the distance between the upper edge of first loophole of described shadow shield and the lower edge of second loophole is less than the last pin position extreme position of described needle bar of sewing machine and the distance between the extreme position of following pin position.When the grooved optocoupler is positioned at lower edge when below of second loophole, two light emitting diode D1, D2 are all blocked by shadow shield, then two triode Q1, not conducting of Q2, and output signal S1, S2 are low level, and be last pin position extreme position this moment; When the grooved optocoupler is between the lower edge of the lower edge of first loophole and second loophole, light emitting diode D1 is blocked by shadow shield, and the light of light emitting diode D2 can see through second loophole, then not conducting of triode Q1, output signal S1 is a low level, and triode Q2 conducting, output signal S2 is a high level, be position, last pin position this moment; When the grooved optocoupler was between the upper edge of the lower edge of first loophole and second loophole, the light of light emitting diode D1, D2 all can see through loophole, the then equal conducting of triode Q1, Q2, and output signal S1, S2 are high level, and be centre position, pin position this moment; When the grooved optocoupler is between the upper edge of the upper edge of first loophole and second loophole, light emitting diode D2 is blocked by shadow shield, and the light of light emitting diode D1 can see through first loophole, then not conducting of triode Q2, output signal S2 is a low level, and triode Q1 conducting, output signal S1 is a high level, is following position, pin position this moment; When the grooved optocoupler is positioned at upper edge when top of first loophole, two light emitting diode D1, D2 are all blocked by shadow shield again, then two triode Q1, not conducting of Q2, and output signal S1, S2 are low level, are pin position extreme position down this moment.Ingenious setting by two loopholes, cooperate with the grooved optocoupler, can obtain easily and corresponding five signals in needle bar of sewing machine position, host computer or CPU are by judging current a signal and a preceding signal, just can judge the residing position of current needle bar of sewing machine exactly, be convenient to host computer or CPU is effectively controlled industrial sewing machine.
As preferably, two light emitting diode D1, D2 of described grooved optocoupler are in series, one termination of this series circuit+5V voltage, the other end ground connection of this series circuit; The colelctor electrode of two triode Q1, Q2 of described grooved optocoupler all connects+5V voltage, and the emission of two triode Q1, Q2 is output signal pin S1, the S2 of grooved optocoupler very, connects host computer or CPU in the industrial sewing machine control system respectively.
As preferably, described shadow shield adopts metal material.Guarantee not have light and see through, and easy to make, and fastness is good.
As preferably, described grooved optocoupler welding in the circuit board, described wiring board is installed in head of sewing machine one side towards needle bar of sewing machine.
The invention has the beneficial effects as follows: by the shadow shield that has two loopholes is installed on needle bar of sewing machine; the grooved optocoupler that is complementary with shadow shield is installed in head of sewing machine one side; make and move up and down in the process at needle bar of sewing machine; two signal output pins of grooved optocoupler can send five kinds and the corresponding high-low level signal in needle bar of sewing machine position; host computer in the sewing-machine control systems or CPU are by judging current a signal and a preceding signal; just can judge the residing position of current needle bar of sewing machine exactly; be convenient to host computer or CPU control effectively to industrial sewing machine; guarantee that Sewing machines shuts down fast and accurately; increase work efficiency greatly, improve security and reliability.
Description of drawings
Fig. 1 is a kind of main TV structure schematic diagram of the present invention.
Fig. 2 is a kind of main TV structure schematic diagram of shadow shield among the present invention.
Fig. 3 is a kind of plan structure schematic diagram of grooved optocoupler among the present invention.
Fig. 4 is a kind of circuit working schematic diagram of grooved optocoupler among the present invention.
1. needle bar of sewing machine among the figure, 2. head of sewing machine, 3. shadow shield, 4. grooved optocoupler, 5. first loophole, 6. second loophole, 7. wiring board.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: the needle position detecting mechanism of industrial sewing machine of present embodiment, as shown in Figure 1, comprise the shadow shield 3 that is fixed in the metal material on the needle bar of sewing machine 1 and be installed on wiring board 7 towards head of sewing machine 2 one sides of needle bar of sewing machine 1, be welded with pin position testing circuit on the wiring board 7, pin position testing circuit comprises grooved optocoupler 4, as shown in Figure 3, one side of the groove of grooved optocoupler 4 has two light emitting diode D1, D2, and the opposite side of groove has two the triode Q1, the Q2 that receive light emitting diode light.As shown in Figure 4, two light emitting diode D1, D2 of grooved optocoupler 4 are in series, one termination of this series circuit+5V voltage, the other end ground connection of this series circuit; The colelctor electrode of two triode Q1, Q2 of grooved optocoupler 4 all connects+5V voltage, and the emission of two triode Q1, Q2 is output signal pin S1, the S2 of grooved optocoupler 4 very, connects host computer or CPU in the industrial sewing machine control system respectively.Shadow shield 3 be arranged in parallel with needle bar of sewing machine 1, and shadow shield 3 and needle bar of sewing machine 1 are positioned at the groove of grooved optocoupler 4.Having two loopholes that vertically are provided with on the shadow shield 3, as shown in Figure 2, is that the position of first loophole 5 and 6, two loopholes of second loophole is corresponding with the position of two light emitting diodes of grooved optocoupler 4 respectively.The equal in length of the length of first loophole 5 and second loophole 6, the length of two loopholes are all less than the last pin position extreme position of needle bar of sewing machine 1 and the distance between the extreme position of following pin position.And the lower edge of first loophole 5 is higher than the lower edge of second loophole 6, the upper edge of first loophole 5 also is higher than the upper edge of second loophole 6, and the distance between the lower edge of the upper edge of first loophole 5 and second loophole 6 is less than the last pin position extreme position of needle bar of sewing machine 1 and the distance between the extreme position of following pin position.
Pin position testing circuit is fixed on the head side of closing on needle bar of sewing machine, and shadow shield is fixed on the needle bar of sewing machine, and passes the groove of grooved optocoupler, can move up and down with needle bar of sewing machine.When the light that sends when the light emitting diode on the grooved optocoupler was blocked by shadow shield, the triode relative with this light emitting diode do not receive light, and then this not conducting of triode does not have signal output; When the light that sends when light emitting diode can pass loophole on the shadow shield, the triode relative with this light emitting diode received light, and then this triode conducting has signal output.Five kinds of situations are specifically arranged, as shown in Figure 1 and Figure 2, when the grooved optocoupler is positioned at the below, lower edge of second loophole, two light emitting diode D1, D2 are all blocked by shadow shield, then two triode Q1, not conducting of Q2, output signal S1, S2 are low level, and be last pin position extreme position this moment; When the grooved optocoupler is between the lower edge of the lower edge of first loophole and second loophole, light emitting diode D1 is blocked by shadow shield, and the light of light emitting diode D2 can see through second loophole, then not conducting of triode Q1, output signal S1 is a low level, and triode Q2 conducting, output signal S2 is a high level, be position, last pin position this moment; When the grooved optocoupler was between the upper edge of the lower edge of first loophole and second loophole, the light of light emitting diode D1, D2 all can see through loophole, the then equal conducting of triode Q1, Q2, and output signal S1, S2 are high level, and be centre position, pin position this moment; When the grooved optocoupler is between the upper edge of the upper edge of first loophole and second loophole, light emitting diode D2 is blocked by shadow shield, and the light of light emitting diode D1 can see through first loophole, then not conducting of triode Q2, output signal S2 is a low level, and triode Q1 conducting, output signal S1 is a high level, is following position, pin position this moment; When the grooved optocoupler is positioned at upper edge when top of first loophole, two light emitting diode D1, D2 are all blocked by shadow shield again, then two triode Q1, not conducting of Q2, and output signal S1, S2 are low level, are pin position extreme position down this moment.The signal truth table of two output signal pin S1, S2 of grooved optocoupler is as shown in the table:
| Grooved optocoupler output signal | Last pin position extreme position | Position, last pin position | The centre position | Position, following pin position | Following pin position extreme position |
| S1 | 0 | 0 | 1 | 1 | 0 |
| S2 | 0 | 1 | 1 | 0 | 0 |
Like this when needle bar of sewing machine moves up and down, shadow shield is also along with moving up and down, grooved light idol on the wiring board is also just in the needle bar of sewing machine moving process, send different high-low level signals, host computer or the CPU of Sewing needles position position feedback in the industrial sewing machine control system, finish the pin position and detect.Host computer or CPU are by judging current a signal and a preceding signal; just can judge the residing position of current needle bar of sewing machine exactly; be convenient to host computer or CPU control effectively to industrial sewing machine; guarantee that Sewing machines shuts down fast and accurately; guarantee that sewing is normal; increase work efficiency greatly, improve security and reliability.
Claims (7)
1. needle position detecting mechanism of industrial sewing machine, it is characterized in that comprising the shadow shield of being located on the needle bar of sewing machine (1) (3) and be located at pin position testing circuit on the head of sewing machine (2), described pin position testing circuit comprises grooved optocoupler (4), one side of grooved optocoupler (4) has two light emitting diode D1, D2, the opposite side of grooved optocoupler (4) has two triode Q1 that receive light, Q2, described shadow shield (3) be arranged in parallel with described needle bar of sewing machine (1), shadow shield (3) is positioned at the groove of described grooved optocoupler (4), shadow shield (3) is provided with two loopholes that vertically are provided with, be first loophole (5) and second loophole (6), article two, the position of loophole is corresponding with the position of two light emitting diodes of grooved optocoupler (4) respectively, described two triode Q1, the output signal of Q2 connects host computer or the CPU in the industrial sewing machine control system respectively.
2. needle position detecting mechanism of industrial sewing machine according to claim 1, it is characterized in that the length of first loophole (5) of described shadow shield (3) and the equal in length of second loophole (6), the length of two loopholes is all less than the last pin position extreme position of described needle bar of sewing machine (1) and the distance between the extreme position of following pin position.
3. needle position detecting mechanism of industrial sewing machine according to claim 1 and 2, it is characterized in that the lower edge of first loophole (5) of described shadow shield (3) is higher than the lower edge of second loophole (6), the upper edge of first loophole (5) also is higher than the upper edge of second loophole (6).
4. needle position detecting mechanism of industrial sewing machine according to claim 3 is characterized in that distance between the lower edge of the upper edge of first loophole (5) of described shadow shield (3) and second loophole (6) is less than the last pin position extreme position of described needle bar of sewing machine (1) and the distance between the extreme position of following pin position.
5. needle position detecting mechanism of industrial sewing machine according to claim 1 is characterized in that two light emitting diode D1, D2 of described grooved optocoupler (4) are in series, one termination of this series circuit+5V voltage, the other end ground connection of this series circuit; The colelctor electrode of two triode Q1, Q2 of described grooved optocoupler (4) all connects+5V voltage, the emission of two triode Q1, Q2 is output signal pin S1, the S2 of grooved optocoupler (4) very, connects host computer or CPU in the industrial sewing machine control system respectively.
6. needle position detecting mechanism of industrial sewing machine according to claim 1 and 2 is characterized in that described shadow shield (3) adopts metal material.
7. needle position detecting mechanism of industrial sewing machine according to claim 1 or 5, it is characterized in that described grooved optocoupler (4) is welded on the wiring board (7), described wiring board (7) is installed in head of sewing machine (2) one sides towards needle bar of sewing machine (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101276468A CN101914841A (en) | 2010-03-19 | 2010-03-19 | Needle position detecting mechanism of industrial sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101276468A CN101914841A (en) | 2010-03-19 | 2010-03-19 | Needle position detecting mechanism of industrial sewing machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469505A (en) * | 2012-06-05 | 2013-12-25 | Juki株式会社 | Sewing machine |
| CN103925883A (en) * | 2014-05-07 | 2014-07-16 | 中国航空工业集团公司上海航空测控技术研究所 | Measuring device and method used for measuring length of cloth in sewing process |
| CN109839257A (en) * | 2017-11-24 | 2019-06-04 | 成都市极米科技有限公司 | A kind of high-precision optocoupler self-checking unit and method |
| CN113108703A (en) * | 2021-04-12 | 2021-07-13 | 渭南高新区木王科技有限公司 | Test probe middle part external diameter detection device |
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| US5381746A (en) * | 1991-09-26 | 1995-01-17 | Mitsubishi Denki Kabushiki Kaisha | Fiber optic detector and power indicator for a sewing machine |
| US7193728B2 (en) * | 2002-08-07 | 2007-03-20 | Advantest Corporation | Processing apparatus, processing method and position detecting device |
| CN101315288A (en) * | 2008-07-01 | 2008-12-03 | 上海派勒电气有限公司 | Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder |
| CN101660250A (en) * | 2008-08-27 | 2010-03-03 | Juki株式会社 | Thread-severing device for sewing machine |
| CN201678825U (en) * | 2010-03-19 | 2010-12-22 | 义乌市华晨机电有限公司 | Needle position detection mechanism for industrial sewing machine |
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2010
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| US5381746A (en) * | 1991-09-26 | 1995-01-17 | Mitsubishi Denki Kabushiki Kaisha | Fiber optic detector and power indicator for a sewing machine |
| US7193728B2 (en) * | 2002-08-07 | 2007-03-20 | Advantest Corporation | Processing apparatus, processing method and position detecting device |
| CN101315288A (en) * | 2008-07-01 | 2008-12-03 | 上海派勒电气有限公司 | Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469505A (en) * | 2012-06-05 | 2013-12-25 | Juki株式会社 | Sewing machine |
| CN103925883A (en) * | 2014-05-07 | 2014-07-16 | 中国航空工业集团公司上海航空测控技术研究所 | Measuring device and method used for measuring length of cloth in sewing process |
| CN103925883B (en) * | 2014-05-07 | 2016-08-17 | 中国航空工业集团公司上海航空测控技术研究所 | A kind of measurement cloth measurement of length device and measuring method during sewing |
| CN109839257A (en) * | 2017-11-24 | 2019-06-04 | 成都市极米科技有限公司 | A kind of high-precision optocoupler self-checking unit and method |
| CN113108703A (en) * | 2021-04-12 | 2021-07-13 | 渭南高新区木王科技有限公司 | Test probe middle part external diameter detection device |
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