CN101671921B - Buttonholing machine - Google Patents
Buttonholing machine Download PDFInfo
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- CN101671921B CN101671921B CN 200910161987 CN200910161987A CN101671921B CN 101671921 B CN101671921 B CN 101671921B CN 200910161987 CN200910161987 CN 200910161987 CN 200910161987 A CN200910161987 A CN 200910161987A CN 101671921 B CN101671921 B CN 101671921B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
- D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
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- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to a buttonholing machine, which can prevent the cloth cutting failure by informing the user of the cutter replacement time before the cutter is abraded or damaged. The buttonholing machine includes stress detecting means for detecting a stress applied to a knife when forming a buttonhole, cumulating means for cumulating, each time the buttonhole is formed, the stress detected by the stress detecting means to calculate a cumulated stress, storing means for storing a threshold stress that causes a wear-out or a breakage of the knife, and informing means for informing a user of a replacement of the knife. When the cumulated stress reaches the threshold stress or before the cumulated stress reaches the threshold stress, the control means controls the informing means to inform the user of the replacement of the knife.
Description
Technical field
The present invention relates to a kind of buttonholing machine, it utilizes cutting knife and hammering section to cut off sewn object, forms the button hole at sewn object.
Background technology
Known a kind of buttonholing machine, it can form at the cloth as sewn object and comprise left and right sides latasuture section before interior Buttonhole stitching or after forming, and forms the button hole between left and right sides latasuture section.
For example shown in Figure 8, buttonholing machine 100 can arrange feeding platform 102 along this upper surface at the upper surface of sewing machine base section 101 with moving freely.Press the cloth pressing 103 of cloth in the upper surface setting of feeding platform 102.By the cloth that is pressed on the feeding platform 102, can form the lock seaming seam at cloth by cloth pressing 103 by feeding platform 102 is moved.
By driving cylinder 115 output shaft 115a is descended, linkage 114 is rotated action, and brace table 113 descends.Thus, the hammering section 112 on the brace table 113 of being arranged on can drop to the position with cutting knife 111 butts, and cloth clamp between itself and the cutting knife 111 and it is cut off (pressing down cut-out), is formed button hole (for example with reference to patent documentation 1) at cloth.
Patent documentation 1: the JP 2006-87813 of Japan communique
Summary of the invention
Because cutting knife is pressed by hammering section when forming the button hole, so if fatigue is cumulative gradually, surpass tolerable limit, then can wear and tear or damage.Because the wearing and tearing of cutting knife or damage can cause that to cut cloth bad, so need to change before this cutting knife.
But in existing buttonholing machine, because according to fabric thickness or the cloth kind cut off, tired levels of accumulation is different, changes the time so can't accurately grasp cutting knife.Therefore, the operator will observe the situation of the actual wear of cutting knife or damage and change.
Therefore, exist the operator must frequently confirm the operation of the time of changing, reduce the problem of operating efficiency.In addition, when being negligent of observing operation or mistake and seeing, be created in produce in the forming process in button hole the cloth cutting knife bad, reduce commodity value, or still the spendable stage is changed waste cutting knife and make the high problem of maintenance cost at cutting knife.
Therefore, the object of the invention is in the generation cutting blade abrasion or the suitable moment before damaging is reported the cutting knife replacing to the operator, prevents that the cloth cutting knife is bad.
Cutting knife (11), it is arranged in the sewing machine base section (2), forms blade in the upper end;
Feeding platform (4), it is arranged in the sewing machine base section, at upper surface mounting sewn object;
Hammering section (12), it is arranged on the sewing machine arm (3), dispose relative with aforementioned cutting knife, clamping sewn object between itself and aforementioned cutting knife and sewn object is cut off;
Actuating mechanism (40), it makes aforementioned hammering section contact/separate with aforementioned cutting knife;
Drive unit (50), itself and aforementioned activities mechanism link, and make the actuating mechanism action by energising; And
Control module (20), it carries out the driving control of aforementioned drive unit,
This buttonholing machine, comprise left and right sides latasuture section before interior Buttonhole stitching or after forming in sewn object formation, utilize aforementioned control module that aforementioned drive unit is driven, aforementioned hammering section is moved to aforementioned cutting knife, between the latasuture section of the left and right sides of sewn object, form the button hole
It is characterized in that having:
Stress detecting unit (20), the stress that applies to aforementioned cutting knife when its detection forms in the button hole;
Cumulative unit (20), it is each when forming the button hole, the cumulative stress that is detected by the aforesaid stresses detecting unit;
Memory cell (24), it stores the limit stress value of aforementioned cutting blade abrasion or damage, and (σ is a); And
Reporting unit (66), it need to change the information of aforementioned cutting knife to user report,
Aforementioned control module before reaching the moment of aforementioned limit stress value by the cumulative cumulative stress value (∑ σ n) in aforementioned cumulative unit or reaching, utilizes aforementioned reporting unit reports on the implementation.
The aforesaid stresses detecting unit is made of LOAD FOR unit (20) and Stress calculation unit (20),
When forming in the button hole, aforementioned LOAD FOR unit (20) basis to the current value of aforementioned drive unit energising, calculates the cut-out load (Pn) of aforementioned sewn object,
Aforesaid stresses computing unit (20) calculates the aforementioned stress that applies to cutting knife according to the cut-out load of the aforementioned sewn object that is calculated by aforementioned LOAD FOR unit,
The cumulative stress that is calculated by the aforesaid stresses computing unit in aforementioned cumulative unit.
Technical scheme 3 described inventions are, in technical scheme 2 described buttonholing machines, it is characterized in that,
The aforesaid stresses computing unit is according to contact area (A) and the aforementioned cut-out LOAD FOR stress of aforementioned cutting knife and aforementioned hammering section.
Technical scheme 4 described inventions are, in technical scheme 1 to 3, in the described buttonholing machine of any one, it is characterized in that,
In aforementioned memory cell, store the minimum stress value (σ w) to aforementioned cutting knife accumulated fatigue,
The not cumulative stress less than aforementioned minimum stress value in aforementioned cumulative unit.
Technical scheme 5 described inventions are, in technical scheme 1 to 3 in the described buttonholing machine of any one,
Storage be used for to be judged cumulative stress value whether near the judgment value (X) of aforementioned limit stress value in aforementioned memory cell,
Have stress difference computing unit (20), it calculates poor between aforementioned cumulative stress value and the aforementioned limit stress value,
Aforementioned control module is less than or equal in the stress difference that the poor computing unit by aforesaid stresses calculates in the situation of aforementioned judgment value, utilizes aforementioned reporting unit reports on the implementation.
Technical scheme 6 described inventions are, in the described buttonholing machine of any one in technical scheme 2 to 5, it is characterized in that,
Aforementioned LOAD FOR unit uses aforementioned hammering subordinate to fall maximum or the mean value of the current value of the specific region in the process, calculates and cuts off load.
Technical scheme 7 described inventions are, in technical scheme 6 described buttonholing machines, it is characterized in that,
Aforementioned LOAD FOR unit uses maximum or the mean value of the current value behind aforementioned hammering section and the aforementioned cutting knife butt, calculates and cuts off load.
Technical scheme 8 described inventions are, in technical scheme 6 described buttonholing machines, it is characterized in that,
Aforementioned control module is controlled the driving of aforementioned drive unit, with the decrease speed of the aforementioned hammering of reduction section before aforementioned hammering section and sewn object butt,
Aforementioned LOAD FOR unit uses the maximum or the mean value that reduce the current value of beginning till aforementioned hammering section and the aforementioned cutting knife butt from aforementioned hammering section decrease speed, calculates cut-out load.
Technical scheme 9 described inventions are, in technical scheme 6 described buttonholing machines, it is characterized in that,
Have detecting unit (67), it detects the driving amount of aforementioned drive unit,
Aforementioned control module is according to the driving amount that is detected by aforementioned detecting unit, calculates the position of aforementioned hammering section,
Aforementioned LOAD FOR unit, be positioned in the situation with the position of sewn object butt utilizing aforementioned control module to calculate aforementioned hammering section, use from aforementioned hammering section and sewn object butt begin to aforementioned cutting knife butt till maximum or the mean value of current value, calculate and cut off load.
The effect of invention
According to technical scheme 1 described invention, when the stress detecting unit forms in the button hole, detect the stress that applies to cutting knife according to the cut-out load of sewn object, the stress that cumulative unit adds up and detected by the stress detecting unit when forming in the button hole.
And, repeating to form in the process in button hole, in moment of the stress value that reached capacity by the cumulative cumulative stress value in cumulative unit or before reaching, need to be changed the information of cutting knife to user report by reporting unit.
Thus, because the fatigue of cutting knife is accumulated at every turn, so the operator can identify the suitable replacing time before wearing and tearing or damage occur cutting knife, prevent the reduction of the bad sewings commodity value that causes of Yin Qiebu when cutting cloth.In addition, really do not take industry as and can be absorbed in and make operation because the operator does not need cutting knife to change the time, make operating efficiency so can improve, and then prevent the too early replacing of cutting knife, reduce maintenance cost.
According to technical scheme 2 described inventions, the current value of switching on to drive unit when LOAD FOR unit basis forms in the button hole, calculate the cut-out load of sewn object, the Stress calculation unit calculates the stress that applies to cutting knife according to the cut-out load of the sewn object that is calculated by the LOAD FOR unit.
Thus, because can calculate exactly the fatigue of cumulative cutting knife, thus can grasp reliably wearing and tearing or the damage prediction constantly of cutting knife, can be exactly to the replacing time of user report cutting knife before occuring, it is bad to prevent cutting cloth.
According to technical scheme 3 described inventions, the Stress calculation unit can by cutting off load divided by the contact area of cutting knife and hammering section, calculate the stress that applies to cutting knife exactly.
According to technical scheme 4 described inventions, because can not make cutting knife tired less than the stress of minimum stress value, thus this less stress is not used for adding up, thus actual cutting knife fatigue and the error between the cumulative stress value can be reduced as far as possible.
According to technical scheme 5 described inventions, whether be less than or equal to pre-stored judgment value by the difference according to cumulative stress value and limit stress value, judge the replacing time of cutting knife, thereby can be before cumulative stress value just will reach capacity stress value, change to the user report cutting knife, reduce cutting knife and change the operation number of times, reduce maintenance cost.
According to technical scheme 6 described inventions, electric current and inequality to the drive unit energising, also different with other constantly load during from the sewn object butt in hammering section, but calculate cut-out load by the current value that uses the specific region, can be whenever when sewn object cut off, the current value under the condition of user's expectation calculates and cuts off load.
According to technical scheme 7 described inventions, after hammering section and cutting knife butt, press cutting knife by making hammering section with larger power, sewn object is cut off, but the moment of torsion of the drive unit of this moment is very large.Calculate cut-out load by the current value that uses this moment, produce the moment of maximum stress and calculate cumulative stress because can catch at cutting knife, so can improve the preventing effectiveness of wearing and tearing or the damage of cutting knife.
According to technical scheme 8 described inventions, the decline of hammering section is slowed down if utilize control module, and then hammering section and sewn object are very approaching.From this in the interval of hammering section and cutting knife butt, it is very large that the moment of torsion of drive unit becomes.Calculate cut-out load by the current value that uses this moment, because can catch the moment that cutting knife produces maximum stress, calculate cumulative stress, so can improve the preventing effectiveness of cutting blade abrasion or damage.
According to technical scheme 9 described inventions, detect the driving amount of drive unit by detecting unit, because the position of calculating hammering section according to the driving amount that is detected by control module, so when hammering section and sewn object butt, also can detect.Here, be in the situation with the position of sewn object butt utilizing control module to calculate hammering section, to the interval of itself and cutting knife butt, the moment of torsion of drive unit is very large after hammering section and sewn object butt.Calculate cut-out load by the current value that uses this moment, produce the moment of maximum stress and calculate cumulative stress because can catch at cutting knife, so can improve the preventing effectiveness of cutting blade abrasion or damage.
Description of drawings
Fig. 1 is the side view of the summary of expression buttonholing machine.
Fig. 2 is the actuating mechanism of expression supporter and cuts the side view of the mechanism of cloth motor.
Fig. 3 is that expression is about the block diagram of the structure of control device.
Fig. 4 is the block diagram that is stored in the data among the EEPROM.
Fig. 5 is the curve of the relation of expression current value and cut-out load.
Fig. 6 is the block diagram that expression is stored in the program among the ROM.
Fig. 7 is the flow chart that expression is used for the report control flow of replacing cutting knife.
Fig. 8 is the side view of cutting a part of observing buttonholing machine of the prior art open.
The specific embodiment
Best mode for the buttonholing machine that the present invention relates at length describes.
The structure of＜buttonholing machine 〉
In Fig. 1, the part of feeding platform 4 is cut open and illustrates.
In Fig. 1 and Fig. 2, buttonholing machine 1 has: pedestal part (sewing machine base) 2; Arm (sewing machine arm) 3, it uprightly is arranged on the pedestal part 2; Feeding platform 4, the upper surface that it is configured in pedestal part 2 makes cloth mobile in horizontal plane; Cloth pressing 5, it is arranged on the upper surface of feeding platform 4, presses the cloth of feeding platform 4 tops from the top; Cloth-cutting apparatus 10, it is used to form the button hole; And control device 20 (with reference to Fig. 3), the action of its control buttonholing machine 1.
Feeding platform 4 is so that its upper surface roughly disposes along the mode of horizontal plane, and the surface loads cloth thereon.
Cloth pressing 5 has: presser feet wrist 52, and it is arranged on the upper surface of feeding platform 4 free to rotately; And pressure foot 54, it is arranged on the front end of presser feet wrist 52 free to rotately, presses cloth from the top.
(cloth-cutting apparatus)
Cloth-cutting apparatus 10 has: cutting knife 11, and it is arranged on the pedestal part 2, forms blade in the upper end; And hammering section 12, it is arranged on the arm 3, and is relative with this cutting knife 11.
Aforementioned cutting knife 11 can be installed on the cutting knife brace table 13 that is fixed on the pedestal part 2 with freely dismantling.The blade of cutting knife 11 is in consecutive mode, the straight line cutting knife section that is formed for forming the round end hole cutting knife section of round end hole section and is used to form line part.
The actuating mechanism 40 that links with supporter 14 has linkage, and this linkage has: first connecting rod 41, and it links with supporter 14 free to rotately; Second connecting rod 42, it links with first connecting rod 41 free to rotately; Third connecting rod 43, it links with second connecting rod 42 free to rotately; And the 4th connecting rod 44, it links with third connecting rod 43 free to rotately.First connecting rod 41 and third connecting rod 43, its middle body is not fixed on the arm 3 free to rotately.
The 4th connecting rod 44 links with moving body 46 free to rotately, this moving body 46 and ball-screw 45 engagements.Ball-screw 45 so that its axis dispose along the mode of the above-below direction of Sewing machines.Utilize pivoting of ball-screw 45, moving body 46 can move along the vertical direction.Be arranged at the gear 47 and gear 48 engagements of ball-screw 45 ends, aforesaid gears 48 axles are supported on the output shaft 50a that cuts cloth motor 50 as the drive unit that makes actuating mechanism 40 actions.
(control device)
To shown in Figure 5, control device 20 has: CPU 21 such as Fig. 3, and it carries out the calculation process relevant with the driving of Sewing machines 1, carries out the control of drive source; ROM 22, required program when the driving control that the required data of cloth or parameter, CPU 21 carry out sewing machine electromotor 61 or cut cloth motor 50 is made or cut in its storage; RAM 23, and it becomes the working region of CPU 21; And EEPROM 24, it is as memory cell, the data that storage is set by the user and the data after the computing.
(EEPROM)
As shown in Figure 4, in EEPROM, the limit stress value σ a of 11 wearing and tearing of storage cutting knife or damage.So-called limit stress value σ a is the limit because of the blade wearing and tearing of repeatedly carrying out Qie Bu and the cutting knife 11 of hammering section 12 butts or the stress that damages.Here, stress is when cutting the cloth operation at every turn, the cumulative stress value ∑ σ n of the stress that applies to cutting knife 11 (n=1,2,3 ...), along with the number of times of cutting cloth increases, the cumulative stress value ∑ σ n of cutting knife 11 also increases.In addition, n is the number of times that forms the button hole, that is, and and the number of times of hammering section 12 and cutting knife 11 butts.
In EEPROM 24, storage is to the minimum stress value σ w of cutting knife 11 accumulated fatigue.So-called minimum stress value σ w is carrying out stipulated number (for example 10 even be
7Inferior) Qie Bushiqiebu cutting knife 11 do not produce the stress value of wearing and tearing or damage and to the critical stress value between the stress value of cutting knife 11 accumulated fatigue, it is determined by material of cutting knife 11 and hammering section 12 yet.
Storage judgment value X in EEPROM 24, whether it is used for judging by repeating to cut the cloth operation and the cumulative cumulative stress value ∑ σ n to cutting knife 11, near limit stress value σ a.So-called judgment value X is due poor between cumulative stress value ∑ σ n and the limit stress value σ a, and the difference of the two is less than or equal to judgment value, and the cumulative stress value ∑ σ n of expression is near limit stress value σ a, and cutting knife 11 will wear and tear, damage soon.This is for by setting judgment value X, carries out the information that cutting knife is changed to user report as early as possible, prevents more reliably wearing and tearing, the damage of cutting knife 11.
As shown in Figure 5, because have the relation shown in the curve in current value and the cut-out load p of this moment to 50 energisings of cloth motor, in EEPROM 24, store formula or the form that satisfies this curve.Thus, if know to the current value of cutting 50 energisings of cloth motor, just can calculate and cut off load p n.Here, n is the number of times that forms the button hole, that is, and and the number of times of hammering section 12 and cutting knife 11 butts.
(ROM: the LOAD FOR program)
As shown in Figure 6, storage LOAD FOR program 22a in ROM22, it realizes following function by being carried out by CPU21: to the current value of cutting 50 energisings of cloth motor, calculate the cut-out load p n of cloth when forming according to the button hole.That is, carry out LOAD FOR program 22a by CPU 21, control device 20 works as the LOAD FOR unit.
LOAD FOR program 22a according to when cutting the current value assumed (specified) load of cloth motor 50 energising, uses specific region in hammering section 12 decline processes to the maximum of the current value of cutting the energising of cloth motor.In addition, employed current value is not limited to maximum, also can be the mean value in this zone.
So-called specific region for example refers to from the position of hammering section 12 and cloth butt, to cutting off cloth with cutting knife 11 butts till the moving range of hammering section 12, use the maximum value calculation load of the current value of cutting cloth motor 50 of this moment.Here, the position of hammering section 12 and cloth upper surface butt can be by being detected the rotation amount of the output shaft 50a that cuts cloth motor 50 by encoder 67, carried out computing and tried to achieve by control device 20.
(ROM: the Stress calculation program)
As shown in Figure 6, storage Stress calculation program 22b in ROM22, it realizes following function by being carried out by CPU 21: the cut-out load p n according to the cloth that calculates by execution LOAD FOR program 22a, calculate the stress that applies to cutting knife 11.That is, carry out Stress calculation program 22b by CPU 21, control device 20 works as the Stress calculation unit.
Here, Stress calculation program 22b realizes following function by being carried out by CPU 21: by by cutting off load p n divided by the contact area A of cutting knife 11 with hammering section 12, calculate the stress σ n that applies to cutting knife 11.In addition, since very little with the width of the blade of the cutting knife 11 of hammering section 12 butts, so can by the width of ignoring cutting knife 11 divided by the length of cutting knife 11, calculate as stress.
As the control device 20 that LOAD FOR unit and Stress calculation unit work, consist of the stress detecting unit that detects when forming in the button hole stress that applies to cutting knife 11.
(ROM: cumulative program)
The cumulative program 22c of storage in ROM22, it realizes following function by being carried out by CPU 21: the cumulative stress σ n that calculates by carrying out Stress calculation program 22b when at every turn forming the button hole.Namely, by carrying out cumulative program 22c by CPU 21, control device 20 works as computing unit, the stress that is detected by stress detecting unit (carry out the LOAD FOR programs by CPU 21, carry out the Stress calculation programs by CPU 21) when being accumulated in each formation button hole.
Here, cumulative program 22c is by realizing following function by CPU 21 execution: the stress σ n that calculates be less than the situation that is stored in the minimum stress value σ w among the EEPROM 24 under, this stress value is considered as 0 and do not add up.This is because if be stress value less than minimum stress value σ w, wearing and tearing or the damage that then can not produce cutting knife 11.
(ROM: the stress difference calculation procedure)
Storage stress difference calculation procedure 22d in ROM22, it realizes following function by being carried out by CPU 21: the add up cumulative stress value ∑ σ n that obtains and be stored in poor between the limit stress value σ a among the EEPROM24 of calculating.That is, by carrying out stress difference calculation procedure 22d by CPU 21, control device 20 works as the stress difference computing unit.
(ROM: control program)
Storage control program 22e in ROM22, it realizes following function by being carried out by CPU 21: be less than or equal in the situation of judgment value X at the cumulative stress value ∑ σ n that calculates by execution stress difference calculation procedure 22d and the stress difference between the limit stress value σ a, show the information that needs to change cutting knife 11 at guidance panel 66 (reporting unit described later).That is, by by CPU 21 executive control program 22e, control device 20 works as control module.
(peripheral device of control device)
Connect at control device 20: cut cloth motor 50, it becomes the drive source when cutting cloth; Sewing machine electromotor 61, it moves up and down suture needle; X feeding pulse motor 62, it makes feeding platform 4 drive to directions X; Y feeding pulse motor 63, it makes feeding platform 4 drive to Y-direction; Rotary pulsed motor 64, it makes suture needle and the rotation of looper device; S/S switch 65, it makes the input that begins to stop; As the guidance panel 66 of reporting unit, it shows the information (for example, expression allows the user change the information of cutting knife 11) to user report, carries out simultaneously the instruction input from the user; And as the encoder 67 of detecting unit, it detects supporter 14 (hammering section 12) apart from the dropping distance of top dead-centre.
From guidance panel 66 can Freely input limit stress value σ a, minimum stress value σ w, judgment value X, the user can be changed according to cutting the cloth condition.
＜about being used for changing the report control of cutting knife 〉
Below, for describing in the driving of cutting cloth motor 50 of carrying out being controlled by CPU 21 when the button hole forms.
As shown in Figure 7, if the beginning Buttonhole is made (step S1), after the Buttonhole sewing finishing, begin to form the button hole, then cutting cloth motor 50 descends hammering section 12, by cutting knife 11 and hammering section 12 clamping clothes, cloth is cut off, form button hole (step S2).In addition, also can carry out Buttonhole after forming the button hole makes.
Form the moment that finishes in the button hole, will form the number of times in button hole, in other words, hammering section 12 is stored among the EEPROM 24 (step S3) with the frequency n of cutting knife 11 butts.As long as do not reset by the operation of guidance panel 66, the frequency n of this storage all adds up.
Then, by carrying out LOAD FOR program 22a, according to cutting off cloth in the position from hammering section 12 and cloth butt to it with cutting knife 11 butts till the moving area of hammering section 12 in, to the maximum of the current value of cloth cutting knife motor 50 energising, calculate and cut off load p n (n is the number of times that the button hole of never using cutting knife to begin forms) (step S4).Here, the calculating of load is carried out when button hole formation number of times being counted at every turn.
Then, by carrying out Stress calculation program 22b, by cutting off load p n divided by the contact area A of cutting knife 11 with hammering section 12, calculate the stress σ n (step S5) that applies to cutting knife 11.Here, contact area A is calculated in advance by employed cutting knife 11, is stored among the EEPROM24.
Then, judge the stress σ n that in step S5, calculates, whether more than or equal to the minimum stress value σ w (step S6) that is stored among the EEPROM 24.
In step S6, judge in the situation of stress σ n more than or equal to minimum stress value σ w (step S6: be), carry out cumulative program 22c, thus, at this stress σ n (step S7) that calculates until the stress σ n last time adds up.
On the other hand, judge that in step S6 making this stress σ n that calculates is 0 (step S8), is accumulated in until among the stress σ n (step S7) last time in the situation of stress σ n less than minimum stress value σ w (step S6: no).That is, make stress σ n 0 cannot not mean cumulatively stress σ n.
Then, by carrying out stress difference calculation procedure 22d, the cumulative stress value ∑ σ n that calculates and be stored in stress difference σ d (step S9) between the limit stress value σ a among the EEPROM 24.
Then, judge whether the stress difference σ d that calculates is less than or equal to the judgment value X (step S10) that is stored among the EEPROM 24 in step S9.
Judge that in step S 10 stress difference σ d is less than or equal in the situation of judgment value X (step S10: be), executive control program 22e thus, shows the information (step S11) that needs to change cutting knifes 11 at guidance panel 66.
On the other hand, in step S10, judge in the situation of stress difference σ d greater than judgment value (step S10: no), return the processing of step S1.
In step S11, by showing the information that needs to change cutting knife 11, the user changes cutting knife 11 (step S12).At this moment, because cutting knife 11 becomes the new product state, so the user passes through operating operation panel 66, the frequency n (step S13) that replacement button hole forms.
＜action effect 〉
Thus, according to buttonholing machine 1, if switched on to cutting cloth motor 50 by control device 20, then cut cloth motor 50 and make actuating mechanism 40 actions, make hammering section 12 contact/separate with cutting knife 11 by actuating mechanism 40.
, carry out LOAD FOR program 22a by CPU 21 here, when forming in the button hole to the current value of cutting 50 energisings of cloth motor, the cut-out load p n of calculating cloth.
Then, carry out Stress calculation program 22b by CPU 21, according to the cut-out load p n of cloth and the contact area A of cutting knife 11 and hammering section 12, calculate the stress that applies to cutting knife 11.
Then, carry out cumulative program 22c by CPU 21, cumulative stress when each formation button hole.Because can not cause the fatigue of cutting knife 11 less than the stress of minimum stress value σ w, by this less stress not being used for adding up, can reduce as far as possible the fatigue of actual cutting knife 11 and the error between the cumulative stress value ∑ σ n here.Thus, can report more accurately the replacing time of cutting knife 11.
And, repeating to form in the process in button hole, cumulative cumulative stress value ∑ σ n reaches capacity in the situation of stress value σ a, and the information that control device 20 will allow the user change cutting knife is presented on the guidance panel 66.
Thus, because the fatigue that when cutting the cloth operation at every turn, adds up cutting knife 11 is applied, so can be before the wearing and tearing or damage of cutting knife 11, to the replacing time of user report cutting knife 11, it is bad to prevent cutting cloth.
In addition, whether be less than or equal to judgment value X by the difference according to cumulative stress value ∑ σ n and limit stress value σ a, judge the replacing time of cutting knife 11, can before cumulative stress value ∑ σ n reaches capacity stress value σ a, change the notice of cutting knife 11 to user report.
Thus, can be arranged to the replacing time of user report cutting knife 11 the sufficient time, improve the preventing effectiveness of cutting knife 11 wearing and tearing or damage.
In addition, because can detect the driving amount of cutting cloth motor 50 by encoder 67, calculate the position of hammering section 12 according to the driving amount that is detected by control device 20, so can detect the butt of hammering section 12 and cloth.Here, be in the situation with the position of cloth butt utilizing control device 20 to calculate hammering section 12, after hammering section 12 and cloth butt until with cutting knife 11 butts during in, the moment of torsion of cloth cutting knife motor 50 becomes very large.Because produce the moment of maximum stress σ n and calculate cumulative stress value ∑ σ n by using the current value calculating cut-out load of this moment, can catching at cutting knife 11, so can improve the preventing effectiveness of wearing and tearing or the damage of cutting knife 11.
＜other 〉
In addition, the invention is not restricted to above-mentioned embodiment.For example, by LOAD FOR program 22a assumed (specified) load the time, also can use maximum or the mean value of hammering section 12 and cutting knife 11 butts current value afterwards, calculate and cut off load.This be because, after hammering section 12 and cutting knife 11 butts, cuts off cloth by making hammering section 12 press cutting knife 11 with larger power, and the moment of torsion of cutting cloth motor 50 at this moment becomes very large.Because can calculate by the current value that uses this moment and cut off load p n, catch the moment that produces maximum stress at cutting knife 11, calculate cumulative stress value ∑ σ n, so can improve the preventing effectiveness of wearing and tearing or the damage of cutting knife 11.
In addition, in the situation that encoder 67 is not set, because the position of the hammering section 12 when not knowing hammering section 12 with the cloth butt, so be mostly above a little more than the cloth upper surface, the decrease speed of hammering section 12 to be reduced.Utilize this principle, also can use the decrease speed of hammering section 12 to reduce speed now after, until maximum or the mean value of hammering section 12 and the current value of cutting knife 11 butts calculate and cut off load p n.If this is that then hammering section 12 is very approaching with cloth owing to by control device 20 decline of hammering section 12 is slowed down.In from then on during hammering section 12 and cutting knife 11 butts, the moment of torsion of cloth cutting knife motor 50 becomes very large.Calculate cut-out load p n by the current value that uses this moment, can catch the moment that maximum stresses occur at cutting knife 11, calculate cumulative stress value ∑ σ n, improve the wearing and tearing of cutting knife 11 or the preventing effectiveness of damage.
In addition, reporting unit is not limited to the demonstration of guidance panel 66, also can be according to the acoustic notifications from buzzer, or according to the report from light.
In addition, use judgment value and before reaching the limit stress value σ a of cutting knife 11 from guidance panel 66 reports, but also can when reaching capacity stress value σ a, report.That is, judgment value X can be set as 0.In addition, just the stress difference between judgment value and limit stress value σ a and the cumulative stress value ∑ σ n is not compared, also can be in the reach capacity moment report of regulation ratio (a certain percentage) of stress value σ a of cumulative stress value ∑ σ n.
Claims (9)
1. buttonholing machine, it has:
Cutting knife, it is arranged in the sewing machine base section, forms blade in the upper end;
The feeding platform, it is arranged in the sewing machine base section, at upper surface mounting sewn object;
Hammering section, it is arranged on the sewing machine arm, dispose relative with aforementioned cutting knife, clamping sewn object between itself and aforementioned cutting knife and sewn object is cut off;
Actuating mechanism, it makes aforementioned hammering section with aforementioned cutting knife contact or separates;
Drive unit, itself and aforementioned activities mechanism link, and make the actuating mechanism action by energising; And
Control module, it carries out the driving control of aforementioned drive unit,
This buttonholing machine, comprise left and right sides latasuture section before interior Buttonhole stitching or after forming in sewn object formation, utilize aforementioned control module that aforementioned drive unit is driven, aforementioned hammering section is moved to aforementioned cutting knife, between the latasuture section of the left and right sides of sewn object, form the button hole
It is characterized in that described buttonholing machine also has:
The stress detecting unit, the stress that applies to aforementioned cutting knife when its detection forms in the button hole;
Cumulative unit, it is each when forming the button hole, the cumulative stress that is detected by the aforesaid stresses detecting unit;
Memory cell, it stores the limit stress value of aforementioned cutting blade abrasion or damage; And
Reporting unit, it need to change the information of aforementioned cutting knife to user report,
Aforementioned control module before reaching the moment of aforementioned limit stress value by the cumulative cumulative stress value in aforementioned cumulative unit or reaching, utilizes aforementioned reporting unit reports on the implementation.
2. buttonholing machine as claimed in claim 1 is characterized in that,
The aforesaid stresses detecting unit is by LOAD FOR unit and Stress calculation cell formation,
When forming in the button hole, aforementioned LOAD FOR unit basis to the current value of aforementioned drive unit energising, calculates the cut-out load of aforementioned sewn object,
The aforesaid stresses computing unit calculates the aforementioned stress that applies to cutting knife according to the cut-out load of the aforementioned sewn object that is calculated by aforementioned LOAD FOR unit,
The cumulative stress that is calculated by the aforesaid stresses computing unit in aforementioned cumulative unit.
3. buttonholing machine as claimed in claim 2 is characterized in that,
The aforesaid stresses computing unit is by by the contact area of aforementioned cut-out load divided by aforementioned cutting knife and aforementioned hammering section, calculated stress.
4. such as the described buttonholing machine of any one in the claims 1 to 3, it is characterized in that,
In aforementioned memory cell, store the minimum stress value to aforementioned cutting knife accumulated fatigue,
The not cumulative stress less than aforementioned minimum stress value in aforementioned cumulative unit.
5. such as the described buttonholing machine of any one in the claims 1 to 3, it is characterized in that,
Storage be used for to be judged cumulative stress value whether near the judgment value of aforementioned limit stress value in aforementioned memory cell,
Have the stress difference computing unit, it calculates poor between aforementioned cumulative stress value and the aforementioned limit stress value,
Aforementioned control module is less than or equal in the stress difference that the poor computing unit by aforesaid stresses calculates in the situation of aforementioned judgment value, utilizes aforementioned reporting unit reports on the implementation.
6. buttonholing machine as claimed in claim 2 or claim 3 is characterized in that,
Aforementioned LOAD FOR unit, use aforementioned hammering subordinate to fall maximum or the mean value of the current value of the specific region in the process, calculate and cut off load, wherein, so-called specific region, refer to from the position of aforementioned hammering section and sewn object butt, to cutting off sewn object with aforementioned cutting knife butt till the moving range of aforementioned hammering section.
7. buttonholing machine as claimed in claim 6 is characterized in that,
Aforementioned LOAD FOR unit uses maximum or the mean value of the current value behind aforementioned hammering section and the aforementioned cutting knife butt, calculates and cuts off load.
8. buttonholing machine as claimed in claim 6 is characterized in that,
Aforementioned control module is controlled the driving of aforementioned drive unit, with the decrease speed of the aforementioned hammering of reduction section before aforementioned hammering section and sewn object butt,
Aforementioned LOAD FOR unit uses the maximum or the mean value that reduce the current value of beginning till aforementioned hammering section and the aforementioned cutting knife butt from aforementioned hammering section decrease speed, calculates cut-out load.
9. buttonholing machine as claimed in claim 6 is characterized in that,
Have detecting unit, it detects the driving amount of aforementioned drive unit,
Aforementioned control module is according to the driving amount that is detected by aforementioned detecting unit, calculates the position of aforementioned hammering section,
Aforementioned LOAD FOR unit, be positioned in the situation with the position of sewn object butt utilizing aforementioned control module to calculate aforementioned hammering section, use from aforementioned hammering section and sewn object butt begin to aforementioned cutting knife butt till maximum or the mean value of current value, calculate and cut off load.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008231695A JP5318507B2 (en) | 2008-09-10 | 2008-09-10 | Hole sewing machine |
| JP2008-231695 | 2008-09-10 | ||
| JP2008231695 | 2008-09-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101671921A CN101671921A (en) | 2010-03-17 |
| CN101671921B true CN101671921B (en) | 2013-03-13 |
Family
ID=41548820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910161987 Expired - Fee Related CN101671921B (en) | 2008-09-10 | 2009-09-10 | Buttonholing machine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2163671B1 (en) |
| JP (1) | JP5318507B2 (en) |
| KR (1) | KR101575685B1 (en) |
| CN (1) | CN101671921B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104342856B (en) * | 2013-08-01 | 2016-06-29 | 启翔股份有限公司 | The cutting knife lifting mechanism of buttonhole device cut by lockstitch button holder |
| TWI509124B (en) * | 2014-02-07 | 2015-11-21 | Chee Siang Ind Co Ltd | A keyhole with hammer adjustment mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5490195A (en) * | 1994-05-18 | 1996-02-06 | Fatigue Management Associates Llc | Method for measuring and extending the service life of fatigue-limited metal components |
| US6305229B1 (en) * | 1997-12-23 | 2001-10-23 | Tanaka Systems Incorporated | Detecting fatigue from magnetic characteristics |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0820349B2 (en) * | 1990-03-31 | 1996-03-04 | ジューキ株式会社 | Torsion tester |
| JP2000005474A (en) * | 1998-06-17 | 2000-01-11 | Juki Corp | Cloth-cutting knife device for eyelet button hole |
| JP4286964B2 (en) * | 1999-05-06 | 2009-07-01 | Ｊｕｋｉ株式会社 | Sewing machine control device |
| WO2002041195A2 (en) * | 2000-11-17 | 2002-05-23 | Battelle Memorial Institute | Structural stress analysis |
| JP2005160934A (en) * | 2003-12-05 | 2005-06-23 | Brother Ind Ltd | Sewing apparatus, telecommunication system of sewing apparatus and control program of sewing apparatus |
| JP2006087813A (en) * | 2004-09-27 | 2006-04-06 | Brother Ind Ltd | Eyelet holing sewing machine |
-
2008
- 2008-09-10 JP JP2008231695A patent/JP5318507B2/en not_active Expired - Fee Related
-
2009
- 2009-09-09 EP EP09169836.5A patent/EP2163671B1/en not_active Not-in-force
- 2009-09-10 KR KR1020090085236A patent/KR101575685B1/en active IP Right Grant
- 2009-09-10 CN CN 200910161987 patent/CN101671921B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5490195A (en) * | 1994-05-18 | 1996-02-06 | Fatigue Management Associates Llc | Method for measuring and extending the service life of fatigue-limited metal components |
| US6305229B1 (en) * | 1997-12-23 | 2001-10-23 | Tanaka Systems Incorporated | Detecting fatigue from magnetic characteristics |
Non-Patent Citations (3)
| Title |
|---|
| JP特公平8-20349B2 1996.03.04 |
| JP特开2000-317161A 2000.11.21 |
| JP特开2000-5474A 2000.01.11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010063570A (en) | 2010-03-25 |
| EP2163671A1 (en) | 2010-03-17 |
| EP2163671B1 (en) | 2015-11-11 |
| KR101575685B1 (en) | 2015-12-08 |
| JP5318507B2 (en) | 2013-10-16 |
| CN101671921A (en) | 2010-03-17 |
| KR20100030608A (en) | 2010-03-18 |
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