CN101109137B - Break detecting device of sewing machine needle - Google Patents
Break detecting device of sewing machine needle Download PDFInfo
- Publication number
- CN101109137B CN101109137B CN2007101262552A CN200710126255A CN101109137B CN 101109137 B CN101109137 B CN 101109137B CN 2007101262552 A CN2007101262552 A CN 2007101262552A CN 200710126255 A CN200710126255 A CN 200710126255A CN 101109137 B CN101109137 B CN 101109137B
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- pin
- needle
- proximity transducer
- sewing machine
- detecting device
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- Geophysics And Detection Of Objects (AREA)
Abstract
Provided is a needle breaking detection apparatus applied on the multi-needle sewing machine whose needles do not contact with the sensor besides the right needle. The needle breaking detection apparatus for the sewing machine has an approaching sensor disposed below the needle plate in order to detect the existence of the needle and further judge the needle breaking based on the existence of the needle. A plurality of approaching sensors are arranged based on the numbers of the left-and-right needle disposed in parallel in the needle break detection apparatus for the sewing machine. Amplifiers are connected to the approaching sensors with the function of interference prevention. The needle breaking is judged by comparing the predetermined needle numbers and the total needle numbers detected by the approaching sensor.
Description
Technical field
The present invention relates to detect the break detecting device of sewing machine needle that the pin that in the making of Sewing machines, takes place fractures.
Background technology
As existing sewing machine pin break detecting device; Known have; The break detecting device of sewing machine needle (for example, with reference to patent documentation 1) that pin fractures is judged in the detection that possesses in order to detect having or not of pin below needle plate the proximity transducer of configuration, has or not based on the pin according to this proximity transducer.
[patent documentation 1] spy open flat 11-221392 communique (the 2-3 page or leaf, Fig. 1-2)
Yet, in existing sewing machine pin break detecting device, only be the below that single proximity transducer is configured in needle plate, can only be applied to a pin and use Sewing machines.In addition, if below needle plate, be arranged side by side a plurality of proximity transducers with Sewing machines in order to be applied to spininess, then each proximity transducer is because the influence of high frequency magnetic field and phase mutual interference, therefore is difficult to carry out the pin judgement that fractures.In addition, except right pin, the distance from needle plate to the pin front end is longer when being in the pin lower dead center sometimes, and degree of crook is more serious, possibly touch proximity transducer at pin decline hour hands.
Summary of the invention
Therefore, the purpose of problem of the present invention is, provide a kind of can be applicable to spininess with on the Sewing machines and the pin except right pin do not contact the pin break detecting device of proximity transducer.
In order to achieve the above object; Break detecting device of sewing machine needle of the present invention possesses in order to detect having or not of pin the proximity transducer of configuration below needle plate; Detection based on the pin according to this proximity transducer has or not judges that pin fractures; This break detecting device of sewing machine needle is characterised in that: according to be arranged side by side about the radical of pin dispose a plurality of proximity transducers, and each proximity transducer connected to have disturb the amplifier that prevents function; Regulation radical through pin relatively with utilize the total radical of the detected pin of each proximity transducer to judge that pin fractures.
In addition, preferably, proximity transducer is installed on the carriage that is fixed in the Sewing machines machine frame, and proximity transducer protection is set on carriage use protective sheet, preferably make protective sheet be positioned at the rear proximity transducer top, the rightest pin pin in addition.
According to the present invention, disturb the amplifier that prevents function because each proximity transducer connected to have, therefore can not occur because the influence of high frequency magnetic field and the situation of phase mutual interference, even can carry out the pin judgement that fractures on Sewing machines at spininess yet.In addition, regulation radical and the total radical that utilizes the detected pin of proximity transducer through pin relatively carries out the judgement that fractures of this pin, so operator's easy master device summary and can make simple in structure.In addition, because protective sheet is positioned at the rear proximity transducer top, the pin beyond the rightest pin, the situation of contact proximity transducer when therefore reducing any pin decline.
Description of drawings
Fig. 1 is the key diagram that summary is set that the break detecting device of sewing machine needle relevant with the present invention is shown.
Fig. 2 is the schematic construction block diagram that the control system of this checkout gear is shown.
Fig. 3 is the fracture flow chart of the relevant action of judgement of the explanation and the pin of this checkout gear.
The specific embodiment
Below, based on description of drawings embodiment of the present invention.Be arranged side by side about three pins (left pin 1, middle pin 2, right pin 3) and main shaft the rotation interlock and moving back and forth up and down, its leading section passes needle plate 4 when descending.Below needle plate 4, looper 5 rocks from side to side with the rotation interlock of main shaft, and as shown in Figure 1, the front end of looper 5 is positioned at the right-hand of each pin when being in the pin lower dead center.In addition, dispose needle guard 6 at each the pin rear that arrives lower dead center.This needle guard 6 constitutes and the known mechanism that seesaws links, when pin begins to rise before so that near the pin rear portion.
Below needle plate 4, possesses the proximity transducer that has or not 7 that detects pin.Use Sewing machines in order to be applied to three pins specifically, about be arranged side by side three proximity transducers, each proximity transducer is fixed on and utilizes screw 8 to be installed on the carriage 9 of Sewing machines machine frame.In addition, owing to the level altitude of setting proximity transducer according to each pin lower end height, therefore the proximity transducer in left side staggers downwards successively.In this embodiment, do not have to describe in detail the screw 8 be arranged on the carriage 9 and use the hole, if but making this hole is longitudinal, upper-lower position that then can bracket 9 when screw 8 relaxes.When hope can be regulated position, the left and right sides, in advance this hole shape is become the shape of growing crosswise and get final product.
In addition, carriage 9 has the protective sheet 10 of proximity transducer protection usefulness.This protective sheet 10 is more outstanding than the front of carriage 9, and its front end is positioned at the rear of the pin (left pin 1, middle pin 2) beyond the pins 3 proximity transducer 7 tops, right.That is,, also utilize the service portion 10a of protective sheet 10 to support near the pin hole 1a, 2a of this pin 1,2, can make the leading section of pin 1,2 not contact proximity transducer 7 even the front end of a left side pin 1 and middle pin 2 is crooked when pin descends.And, make protective sheet 10 be positioned at the below of needle guard 6, and utilize pipe 7a that the wiring of each proximity transducer is tied with line, so that when needle guard 6 seesaws, also do not become obstacle.
In each proximity transducer 7, be connected with line (omit diagram) via wiring and have the amplifier 11 that interference prevents function.This amplifier 11 is a kind of of amplifying circuit, possesses to disturb to prevent that switch, this switch from can switch to three positions.In this embodiment, the interference that is connected to the amplifier 11 on each proximity transducer 7 is prevented that switch is separately positioned on the different positions, constituting each proximity transducer 7 can the phase mutual interference owing to the influence of high frequency magnetic field.In addition,, adopt the system EH-302 of Keyence company (キ one エ Application ス society),, adopt system ES-M1 of the said firm and ES-M2 about amplifier 11 about proximity transducer 7.In addition, the sensitivity that utilizes the potentiometer (volume) that is attached to amplifier 11 to carry out proximity transducer 7 is regulated.
Carry out the control relevant with the present invention by computer, as shown in Figure 2, computer possesses CPU12, ROM13, RAM14 and EEPROM15.In ROM13, store the elemental motion program of judging that pin fractures, in RAM14, store from the associated data of proximity transducer 7 outputs.In EEPROM15, store pin that the operator the edits usefulness judgment standard value that fractures.
In addition, in CPU12, be connected with rotation detector 16, the crown is counted configuration switch 17, Sewing machines halt circuit 18, Sewing machines stopping light 19 and reset switch 20.Rotation detector 16 is once just exported rotational pulse signal in the every rotation of Sewing machines, and its output period is the assigned position beyond the pin lower dead center.The crown is counted configuration switch 17 and is switched to three positions (1～3 pin is used), and Sewing machines halt circuit 18 is used to export the stop signal of sewing machine electromotor.Sewing machines stopping light 19 is lighted when stopping Sewing machines according to Sewing machines halt circuit 18, and reset switch 20 is used for initialization is carried out in the action of Sewing machines halt circuit 18 and Sewing machines stopping light 19.
According to Fig. 3 the control action in this embodiment is described below.If this device is dropped into power supply, then pin is fractureed and detect number of times c and carry out initialization and be set at zero (#1).Count the setting (#2) that configuration switch 17 carries out the regulation radical h of pin through the crown then, perform the preparation before Sewing machines drives.In this embodiment,, therefore set and stipulate that it is " 3 " that pin is counted h because three pins are installed.If the driving Sewing machines, then three pins intermittently pass needle plate 4, therefore utilize corresponding proximity transducer 7 to detect having or not of this pin, calculate the total radical n (#3) of detected pin.That is, detected under the situation of pin by each proximity transducer 7, the total pin is counted n and is " 3 ".At this, as detecting, not only comprise the fracture of pin leading section to there not being the condition of pin, also comprise the bending outside the permissible range.
Then, confirm, up to confirming till rotational pulse signal, to keep calculating (#3) processing that the total pin is counted n from the rotational pulse signal (#4) of rotation detector 16 outputs.Confirming under the situation of rotational pulse signal, stipulating that relatively pin is counted h and the total pin is counted n (#5).Count h and amount to pin and count under the consistent situation of n at the regulation pin, the pin detection number of times c that fractures is carried out initialization and turns back to zero (#6), proceed to amount to pin and count the later processing of the calculating of n (#3).Count h and amount to pin and count under the inconsistent situation of n at the regulation pin, be judged as " pin fractures ", pin is fractureed detect number of times c and add 1 (#7).Whether continuous in addition, whether confirming to fracture pin, to detect number of times c bigger than 2, promptly confirm the pin fracture (#8) that is judged as for three times.Fractureing at pin, to detect number of times c be under the situation below 2, proceeds to amount to pin and count the later processing of the calculating of n (#3).
Fracture at pin and to detect number of times c when bigger than 2, through Sewing machines halt circuit 18 output Sewing machines stop signals (#9), will be as Sewing machines stopping light 19 and the LED that stops of employing lights (#10).After this, confirm whether pushed reset switch 20 (#11), till pushing this reset switch 20, keep stopping of sewing machine electromotor.If confirm to be pressed to reset switch 20, then make the Sewing machines stop signal for turn-offing, and pin fractureed detect number of times c and carry out initialization (#12), proceed to amount to pin and count the later processing of the calculating of n (#3).In addition, even under the situation of the regulation radical h that increases and decreases pin along with the change of making specification, also can directly utilize the action control (#3～#12), need not append new structure relevant with Fig. 3.
In this embodiment, count the calculating (#3) of n and handle amounting to pin as inserting, there is not tight qualification according to the fracture timing of detection of the pin of proximity transducer.Thus, slow excessively (オ one バ one ス ロ one) or the calculation process speed of CPU of the pin of velocity variations etc. needn't be considered to follow, the Sewing machines that high-speed driving is used can be applied to.
Claims (3)
1. a break detecting device of sewing machine needle possesses in order to detect having or not of pin the proximity transducer that below needle plate, disposes, and judges that based on the detection that the pin according to this proximity transducer has or not pin fractures, and this break detecting device of sewing machine needle is characterised in that:
According to be arranged side by side about the radical of pin dispose a plurality of proximity transducers, and each proximity transducer connected to have disturb the amplifier that prevents function;
Regulation radical through pin relatively and when the every rotation of Sewing machines one time, utilize the total radical of the detected pin of each proximity transducer to judge that pin fractures.
2. break detecting device of sewing machine needle according to claim 1 is characterized in that:
Proximity transducer is installed on the carriage that is fixed in the Sewing machines machine frame, and carriage is provided with the proximity transducer protection and uses protective sheet.
3. break detecting device of sewing machine needle according to claim 2 is characterized in that:
Protective sheet is positioned at the rear proximity transducer top, the pin beyond the rightest pin.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006196938A JP4874022B2 (en) | 2006-07-19 | 2006-07-19 | Sewing machine breakage detection device |
| JP2006-196938 | 2006-07-19 | ||
| JP2006196938 | 2006-07-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109137A CN101109137A (en) | 2008-01-23 |
| CN101109137B true CN101109137B (en) | 2012-07-04 |
Family
ID=39041387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101262552A Expired - Fee Related CN101109137B (en) | 2006-07-19 | 2007-06-26 | Break detecting device of sewing machine needle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4874022B2 (en) |
| CN (1) | CN101109137B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851883A (en) * | 2012-09-17 | 2013-01-02 | 吴江市晓昱喷气织造有限公司 | Detector for sewing machine |
| JO3355B1 (en) * | 2016-12-14 | 2019-03-13 | Groz Beckert Kg | Device and method for handling fragments of a broken needle |
| CN107099951B (en) * | 2017-05-25 | 2020-05-05 | 杰克缝纫机股份有限公司 | Sewing machine and skip stitch detection device and detection method thereof |
| CN110438669B (en) * | 2019-07-19 | 2022-01-04 | 珠海合和服装有限公司 | Online sewing machine based on Internet of things technology and management system thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5383414A (en) * | 1993-05-17 | 1995-01-24 | Union Special Corporation | Apparatus for making a three needle stitch with cover thread |
-
2006
- 2006-07-19 JP JP2006196938A patent/JP4874022B2/en not_active Expired - Fee Related
-
2007
- 2007-06-26 CN CN2007101262552A patent/CN101109137B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5383414A (en) * | 1993-05-17 | 1995-01-24 | Union Special Corporation | Apparatus for making a three needle stitch with cover thread |
Non-Patent Citations (4)
| Title |
|---|
| JP平2-42380A 1997.04.16 |
| JP特开2000-14954A 2000.01.18 |
| JP特开2003-46382A 2003.02.14 |
| JP特开平11-221392A 1999.08.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101109137A (en) | 2008-01-23 |
| JP2008022970A (en) | 2008-02-07 |
| JP4874022B2 (en) | 2012-02-08 |
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Granted publication date: 20120704 Termination date: 20210626 |