CN110552121A - Method for bottom line margin detection - Google Patents
Method for bottom line margin detection Download PDFInfo
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- CN110552121A CN110552121A CN201910853311.5A CN201910853311A CN110552121A CN 110552121 A CN110552121 A CN 110552121A CN 201910853311 A CN201910853311 A CN 201910853311A CN 110552121 A CN110552121 A CN 110552121A
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- sewing
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
- D05B59/02—Devices for determining or indicating the length of thread still on the bobbin
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2205/00—Interface between the operator and the machine
- D05D2205/12—Machine to the operator; Alarms
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a method for detecting the margin of a bottom line, which comprises the following steps: a) setting the needle pitch A of a machine needle, detecting a signal by a bottom thread detection sensor, sending the signal to a bottom thread residual quantity B during electric control, and calculating to obtain the number of needles P which can be sewn by the residual quantity B to be B/A; b) recording the number of the needles C sewn in the set interval and the number E of the sewing units D, and calculating to obtain the number of the needles Q required by one sewing unit D as C/E; c) and judging whether the remaining thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving an alarm. The invention can prejudge the remaining thread of the bottom thread in advance, avoid reworking or stitch removal caused by prompting that the bottom thread is not available in the midway of sewing, and further achieve the original purpose of bottom thread detection.
Description
Technical Field
The invention belongs to the technical field of sewing, and particularly relates to a method for detecting the margin of a bottom thread.
Background
a sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a fabric, thereby interweaving or stitching together one or more layers of the fabric. When the sewing machine is used for sewing the fabric, a rotating shuttle and a needle of the sewing machine are matched with each other to enable the bottom thread and the surface thread to be interwoven and sewn on the fabric in a linkage mode, and therefore stitches are formed. The upper thread penetrates through a needle eye of the machine needle, and the machine needle performs ascending and descending motions; the rotary shuttle is composed of a bobbin case and a bobbin, the bobbin is accommodated in the bobbin case, and a bobbin thread is wound around the bobbin. The upper thread is generally longer, 3000m-4000m, and the user can observe the amount of the upper thread at any time during the sewing process, so the upper thread can be replaced in time. However, due to the limitation of the space and mechanism principle of the sewing machine, the bobbin thread is generally short, only 20m-50m, so the bobbin thread needs to be frequently replaced in the sewing process, and if the bobbin thread is not found yet when used up, a needle hole is produced on the cloth in a non-operating manner, so that the waste of precious cloth is caused, and the reworking intensity of workers is increased.
At present, the existing method for detecting the remaining amount of the bobbin thread is to immediately alarm after acquiring an alarm signal, wherein the alarm signal can be set as the length of the remaining thread set in a program according to the use requirement, or the change of the rotating angular speed of the bobbin.
Above-mentioned bottom thread surplus detection mode can realize the detection to the bottom thread surplus, then reports to the police to indicate when sewing machine in sewing product to midway that the bottom thread has not, then the user can only adopt to change the shuttle peg wiring and carry out mechanical sewing, perhaps tears the line that sews before and sews again, and it can't reach the original intention that the bottom thread detected.
Disclosure of Invention
In view of the above, it is necessary to provide a method for detecting the remaining amount of the bottom line in order to solve the technical problems in the prior art.
Specifically, the method for detecting the margin of the bottom line comprises the following steps:
a) Setting the needle pitch A of a machine needle, detecting a signal by a bottom thread detection sensor, sending the signal to a bottom thread residual quantity B during electric control, and calculating to obtain the number of needles P which can be sewn by the residual quantity B to be B/A;
b) Recording the number of the needles C sewn in the set interval and the number E of the sewing units D, and calculating to obtain the number of the needles Q required by one sewing unit D as C/E;
c) And judging whether the remaining thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving an alarm.
As a preferable scheme of the present invention, in the step "c"), whether the remaining thread amount B can finish the sewing of one sewing unit D is judged, if not, an alarm is given, otherwise, the alarm is not given, "when the remaining thread amount B can finish the sewing of one sewing unit D, the remaining thread amount B is continuously judged whether the sewing of one sewing unit D can be finished until the alarm is given.
As a preferable embodiment of the present invention, the step "c) of judging whether the remaining thread amount B can finish sewing of one sewing unit D, and if not, giving an alarm, otherwise, not giving an alarm" is based on a comparison between (P-N × Q)/Q and 1, where N is the number of sewing units D.
as a preferable scheme of the present invention, the step "c)" of judging whether the thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving an alarm "uses the signal sent by the bobbin thread detecting sensor in the existing bobbin sewing process as a trigger signal to send to the electronic control.
As a preferable mode of the present invention, in the step "b"), the number of needles C sewn in the set section and the number E of sewing units D are recorded, and the set section in which the number of needles Q required for one sewing unit D is calculated as C/E "is set as the section node by sending a signal to the electronic control by the lower thread detecting sensor.
in a preferred embodiment of the present invention, the "set section" is a section in which the lower thread detection alarm of at least one bobbin is a start signal and the lower thread detection sensor of the existing bobbin sends a signal to the electronic control unit as an end signal.
In a preferred embodiment of the present invention, the "remaining thread amount B" includes a multiple gear remaining thread amount B, and the multiple gear remaining thread amount B can be alternatively selected and set.
As a preferable aspect of the present invention, the bobbin thread detecting sensor that detects the signal and transmits the signal to the electronic control is a photoelectric sensor, and the photoelectric sensor is configured to detect a signal trigger in the rotary hook.
In a preferred embodiment of the present invention, the method further comprises step D) of clearing the number of sewing needles C, the number of sewing units D E, and the number of sewing units D N recorded in the set section.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
According to the method for detecting the residual quantity of the bottom thread, provided by the invention, the sewing units to be sewn are recorded, the number of needles required by each sewing unit when the sewing units are sewn is obtained, and the number of needles corresponding to the residual quantity B of the bottom thread is compared and judged with the number of needles corresponding to each sewing unit, so that the function of prejudgment is achieved, the judgment accuracy is high, the phenomenon that the bottom thread is not available in the midway of sewing to cause rework or thread removal is avoided, and the original and original purpose of bottom thread detection is further achieved.
Drawings
Fig. 1 is a flowchart of a method for bottom line margin detection according to an embodiment of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, a method for baseline margin detection according to an embodiment of the present invention includes the following steps: a) setting the needle pitch A of a machine needle, detecting a signal by a bottom thread detection sensor, sending the signal to a bottom thread residual quantity B during electric control, and calculating to obtain the number of needles P which can be sewn by the residual quantity B to be B/A; b) recording the number of the needles C sewn in the set interval and the number E of the sewing units D, and calculating to obtain the number of the needles Q required by one sewing unit D as C/E; c) and judging whether the remaining thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving an alarm. It should be noted that the sewing unit D is specifically a sewing machine for sewing a piece of clothes or a pattern to be sewn, or other objects to be sewn according to the needs, and may specifically include the number of times of thread trimming and the like according to the needs of use, that is, the method of the present embodiment is suitable for a sewing machine for repeating the sewing operation.
And c), judging whether the residual thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving the alarm, and if the residual thread amount B can finish the sewing of one sewing unit D, continuing to judge whether the residual thread amount B can finish the sewing of the one sewing unit D until the alarm is given. That is, in the present embodiment, when the set remaining thread amount B is sufficient to finish sewing of one sewing unit D, sewing of the sewing unit D is continued, and then re-judgment is performed until the remaining thread amount B is insufficient to finish sewing of one sewing unit D at the end, and an alarm is issued.
Specifically, in the present embodiment, when determining whether the remaining thread amount B can complete the sewing of one sewing unit D, the comparison between (P-N × Q)/Q and 1 is used as the basis for the determination, where N is the number of sewing units D, and may be 0, 1, or 2 …. It should be noted that, when N is 0, the number P of stitches that can be sewn by the excess thread amount B is compared with the number of stitches required to sew one sewing unit D, and when N is a specific number, the number P of stitches that can be sewn by the excess thread amount B remaining after the completion of the N sewing units D is compared with the number of stitches required to sew one sewing unit D.
It can be understood that when (P-N Q)/Q is larger than or equal to 1, the alarm is not triggered, the residual quantity of the bobbin thread on the bobbin is prompted to be enough to finish the sewing of one sewing unit D, the bobbin thread on the bobbin is continuously consumed, the sewing of the sewing unit D is continuously carried out until (P-N Q)/Q is smaller than 1, the alarm is triggered, the user is prompted to need to replace the bobbin, and therefore the bobbin thread is accurately pre-judged in advance.
In this embodiment, the step "c)" judges whether the thread amount B can finish the sewing of one sewing unit D, and if not, gives an alarm, otherwise, does not give an alarm "uses the signal sent from the bobbin thread detecting sensor to the electronic control in the existing bobbin sewing process as the trigger signal. The bobbin thread detecting sensor of the present embodiment is a photoelectric sensor, and the photoelectric sensor is used to detect a signal trigger in the rotating shuttle, and the signal trigger on the rotating shuttle can trigger the photoelectric sensor according to the movement of the rotating shuttle when the sewing machine is in operation.
In the present embodiment, in the step "b"), the number of needles C to be sewn and the number E of sewing units D in the set section are recorded, and the set section in which the number of needles Q required for one sewing unit D is calculated as C/E "is set as the section node by the bobbin thread detecting sensor sending a signal to the electronic control.
Specifically, the "set interval" is an interval in which the bobbin thread detection alarm of more than one bobbin is used as a start signal, and the bobbin thread detection sensor of the existing bobbin sends a signal to the electronic control unit to be used as an end signal ".
In the present embodiment, the "thread residual amount B" includes a multi-step thread residual amount B, and the multi-step thread residual amount B can be alternatively selected and set, specifically, the parameter can be rotated or input according to the thickness of the bobbin thread or the requirement of the sewing unit D to be sewn by the sewing machine.
as a preferable aspect of the present invention, the method of the present embodiment further includes a step D) of clearing the number of sewing needles C, the number of sewing units D E, and the number of sewing units D N recorded in the set section. Make this sewing machine can be according to the demand of using, sew different sewing unit D with the bottom line on the lock core of difference for the sewing machine can be applicable to different sewing unit D. That is, the skilled person can perform accurate judgment in advance of the same bobbin thread margin when sewing different bobbin cores corresponding to different sewing units D according to the use requirement.
In summary, the method for detecting the remaining amount of the bobbin thread provided by the invention records the sewing units to be sewn, obtains the number of needles required by each sewing unit when sewing, and then compares and judges the number of needles corresponding to the remaining amount of the bobbin thread B with the number of needles corresponding to each sewing unit, so as to achieve the function of prejudgment in advance, has high judgment accuracy, avoids reworking or thread removal caused by the fact that the bobbin thread is not available in the midway of sewing, and further achieves the purpose of original and original intention of bobbin thread detection.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
the above-mentioned embodiments only express a few embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for baseline margin detection, characterized by: the method comprises the following steps:
a) Setting the needle pitch A of a machine needle, detecting a signal by a bottom thread detection sensor, sending the signal to a bottom thread residual quantity B during electric control, and calculating to obtain the number of needles P which can be sewn by the residual quantity B to be B/A;
b) Recording the number of the needles C sewn in the set interval and the number E of the sewing units D, and calculating to obtain the number of the needles Q required by one sewing unit D as C/E;
c) And judging whether the remaining thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving an alarm.
2. The method for floor margin detection as set forth in claim 1, wherein: and step c), judging whether the residual thread amount B can finish the sewing of one sewing unit D or not, if not, giving an alarm, otherwise, not giving the alarm, and if the residual thread amount B can finish the sewing of one sewing unit D, continuing to judge whether the residual thread amount B can finish the sewing of the one sewing unit D or not until the alarm is given.
3. The method for floor margin detection as set forth in claim 2, wherein: and step c), judging whether the remaining thread amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving the alarm, and taking the comparison between (P-N × Q)/Q and 1 as a judgment basis, wherein N is the number of the sewing units D.
4. The method for floor margin detection as set forth in claim 1, wherein: and step c), judging whether the thread residual amount B can finish the sewing of one sewing unit D, if not, giving an alarm, otherwise, not giving an alarm, and taking the signal sent by the bottom thread detection sensor in the existing bobbin sewing process as a trigger signal.
5. the method for floor margin detection as set forth in claim 1, wherein: and step b), recording the number of the needles C sewn in the set section and the number E of the sewing units D, calculating the set section in which the number of the needles Q required by one sewing unit D is equal to C/E, and sending a signal to the electronic control by the bottom line detection sensor to serve as a section node.
6. The method for floor margin detection as set forth in claim 5, wherein: the ' set interval ' is an interval in which the bobbin thread detection alarm of more than one bobbin is taken as a starting signal, and the bobbin thread detection sensor of the existing bobbin sends a signal to the electronic control unit to be an end signal '.
7. The method for floor margin detection as set forth in claim 1, wherein: the residual thread amount B comprises a multi-gear residual thread amount B, and the multi-gear residual thread amount B can be selected and set alternatively.
8. The method for floor margin detection as set forth in claim 1, wherein: the bottom line detection sensor in the bottom line detection sensor detects signals and sends the signals to the electronic control unit is a photoelectric sensor, and the photoelectric sensor is used for detecting a signal trigger in the rotating shuttle.
9. The method for floor margin detection as set forth in claim 3, wherein: further comprises a step D) of zero clearing the number C of the sewing needles, the number E of the sewing units D and the number N of the sewing units D which are recorded in the set interval.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910853311.5A CN110552121B (en) | 2019-09-10 | 2019-09-10 | Method for bottom line margin detection |
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| CN201910853311.5A CN110552121B (en) | 2019-09-10 | 2019-09-10 | Method for bottom line margin detection |
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| CN110552121A true CN110552121A (en) | 2019-12-10 |
| CN110552121B CN110552121B (en) | 2022-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005165A (en) * | 2019-12-16 | 2020-04-14 | 拓卡奔马机电科技有限公司 | Keyhole bottom thread consumption calculation method and shuttle peg remaining thread amount control method |
| TWI844236B (en) * | 2023-02-21 | 2024-06-01 | 財團法人鞋類暨運動休閒科技研發中心 | Sewing machine pre-mass-production learning method and auxiliary kit |
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| CN111005165A (en) * | 2019-12-16 | 2020-04-14 | 拓卡奔马机电科技有限公司 | Keyhole bottom thread consumption calculation method and shuttle peg remaining thread amount control method |
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| TWI844236B (en) * | 2023-02-21 | 2024-06-01 | 財團法人鞋類暨運動休閒科技研發中心 | Sewing machine pre-mass-production learning method and auxiliary kit |
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