CN1037988C - Method and apparatus for starting looms - Google Patents
Method and apparatus for starting looms Download PDFInfo
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- CN1037988C CN1037988C CN92109743A CN92109743A CN1037988C CN 1037988 C CN1037988 C CN 1037988C CN 92109743 A CN92109743 A CN 92109743A CN 92109743 A CN92109743 A CN 92109743A CN 1037988 C CN1037988 C CN 1037988C
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- loom
- speed
- motor
- gyration
- starting
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Abstract
In the startup of a loom, electromagnetic contactors 17, 15 are set 'on' based on the command from a control computer C to bring the primary winding wires CL1, CL2 and CL3 of a loom driving motor M to a delta- connected circuit and the loom is started in such a state as to apply overvoltage exceeding a rated voltage. The rotational speed of the loom is detected by a rotary encoder, and the result is compared with a predetermined set value, and when the above rotational speed reaches the specified value, the contactor 15 is set 'off' along with setting another electromagnetic contactor 16 'on' to bring the primary winding wires to a star-connected circuit and make a changeover of rated voltage application; the decline in the rotational speed with this changeover is controlled to the stationary rotational speed or so, thereby ensuring the first beating up after startup to be made at the stationary rotational speed.
Description
The present invention relates to a kind of starting method and device of loom, particularly a kind of starting method and device that when loom starts, does not produce crosspiece (weft yarn braiding clouding) on the fabric.
In general, after the firm entry into service of loom, it is not enough that the power of beating up can seem, thereby can produce crosspiece on the fabric.In order to prevent this phenomenon, the Japan Patent spy open clear 57-51846, spy open clear 58-132145 and special open all disclose on the clear 59-173342 communique overvoltage of rated voltage will be above steady running the time be applied to loom drive with motor on and the method for starting loom.During driving with motor, the loom put down in writing on each communique in the past all has for applying steady running with the Y-connection loop of rated voltage and only when starting, apply superpotential triangle link circuit.Drive with comparing with by the Y-connection loop rated voltage being applied on this motor on the motor by the triangle link circuit overvoltage being applied to loom, the torque meeting of its generation is several times as much as nominal torque.Owing to produced high torque like this, the power of beating up when power of beating up after running has just begun and steady running will be enhanced same degree.Just can prevent that thus just having begun the back in running produces crosspiece.
If apply overvoltage by the triangle link circuit, then the one-period at loom moves at the end, just the speed of gyration of loom can reach stabilized (steady-state) speed.The power of beating up when power of beating up after therefore, running has just begun and steady running has been enhanced same degree.Thereby, to apply with respect to motor superpotential and be transformed into the applying of rated voltage, could realize during the identical state of the range degree that beats up in the time of must the power of beating up reaches with its steady running under the operating condition of loom for for the nominal level of decision Motor torque.This conversion time is in case postpone, the power of beating up after the running beginning just can become very strong, produces blocked up Mi Lu (tightness degree that weft yarn inweaves has surpassed required), in addition, if the time that torque descends and the time-interleaving of beating up will produce light filling bar (the lax degree that weft yarn inweaves has surpassed requirement).Otherwise if conversion time is too early, the power of beating up after the running beginning dies down, and also can produce light filling bar.
Open clear 57-51846 number and the spy opens in the disclosed device in the past of clear 58-132145 communique the spy, the conversion from the triangle link circuit to the Y-connection loop is determined to carry out after the time from running beginning one.If setting that should the time is appropriate, just beating up and can under the steady turning speed state, carry out after then running has just begun, and do not produce crosspiece.But because about the institutes such as work table rotation angle of this time when being the capacity that is subjected to specified speed of gyration, operating load, loom drive motors, running beginning, it is very difficult therefore it to be carried out optimal time set.
Open in the disclosed device in the past of clear 59-173342 communique the spy, along with of the conversion of triangle link circuit to the starting link circuit, the torque of motor diminishes, the speed of gyration (running speed) that is loom reduces, for the crosspiece that prevents to produce therefrom, being set at its conversion time beats up just begin after, determine according to detected work table rotation angle this conversion time.But in this mode, can not prevent because the caused crosspiece of speed of gyration when surpassing the specified running of loom.
The purpose of this invention is to provide a kind of starting method and device that can prevent in advance when loom starts that crosspiece from producing.
According to an aspect of the present invention, a kind of starting method of loom, when loom starts, to be applied on this motor above the overvoltage that loom drives with the motor rated voltage, and after starting, detect the speed of gyration of loom, when the speed of gyration of loom reaches the speed of regulation, apply state from overvoltage again and convert rated voltage to and apply state motor.
According to a further aspect in the invention, a kind of starting device of loom, it comprises: loom drives with motor, rated voltage is applied to Y-connection loop on this motor, overvoltage is applied to triangle link circuit on this motor, by using selectively in the loom that these two kinds of loops turn round, this starting device has: the speed detector that detects weaving machine turning speed; Compare according to detection speed that draws from this speed detector and predefined weaving machine turning speed, control is transformed into the conversion control device of the use in described Y-connection loop from the use of described triangle link circuit.
When motor applies overvoltage, loom running beginning back initial beat up before, the speed of gyration of loom is that to have reached steady turning speed above.When the speed of gyration of loom reaches roughly stable speed of gyration, if converting rated voltage to, the state that will apply to the overvoltage of motor applies state, along with this conversion, the following general who has surrendered of motor speed of gyration is suppressed in the degree of steady turning speed.Therefore, beating up after the loom running beginning is to carry out under the steady turning speed state of motor.Thereby prevented the generation of crosspiece.
Shown in Figure 1 is the loom diagrammatic side views of the present invention's one specific embodiment, and assembly has the electric loop of this loom;
Fig. 2 and Fig. 3 are that expression control is from the block diagram of triangle link circuit to the program of Y-connection loop conversion.
Below 1 to 3 a specific embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the whole diagrammatic side views of loom.Loom has drive motors M and let-off motor 1.Make through axle 2 rotations by let-off motor 1, send warp thread T.Warp thread T is through later roller 3 and idler roller 4 and the woven device that leads.Woven device is made of heald frame 5, reed 6 and weft inserting apparatus (not shown).They move along with the running of motor M.Woven device is made into fabric W according to these actions.Fabric W batches on the Kroes Luo Er W via expanding cloth bar 7, licker-in roller 8 and press roller 9.
Idler roller 4 is installed in an end of nutted rod 11, at the other end of nutted rod 11 extension spring 12 is installed, and by this spring tension force is applied on the warp thread T.Nutted rod 11 is bearing in an end of test rod 13 pivotally, and the other end of test rod 13 is connecting load cell 14.The tension force of warp thread is situated between and helps idler roller 4, and nutted rod 11 and test rod 13 are delivered on the load cell 14, and load cell 14 is again outputing on the computer C with the corresponding signal of telecommunication of warp tension.The rotating speed of the tension data control motor 1 that computer C spreads out of according to load cell 14, thus warp tension when woven controlled.
Loom drives and has three line chart CL1, CL2, CL3 with motor M, if electromagnetic contactor 15 is connected, then primary winding CL1, CL2, CL3 constitute the triangle link circuit, if electromagnetic contactor 16 is connected, then constitute the Y-connection loop.No matter constitute any in two loops, if connect electromagnetic contactor 17 again then can between primary winding CL1, CL2, CL3, apply starting voltage.Under the state that constitutes the triangle link circuit, the overvoltage of rated voltage is applied between primary winding CL1, CL2, the CL3 between primary winding CL1, the CL2 when surpassing formation Y-connection loop, CL3.Electromagnetic contactor 15,16,17 and computer C join.Computer C links to each other with the rotary encoder 18 that detects loom work table rotation angle.Have, so-called workbench is exactly the mechanism that the power of motor M is passed to woven device again, and the woven action of a circulation is once just carried out in this workbench 1 every revolution.
Computer C is according to the switching of controlling electromagnetic contactor 15,16,17 from the work table rotation angle-data of rotary encoder 18 inputs.Input unit 21 links to each other with computer C, the specified speed of gyration Vo when preestablishing the loom steady running by its operation.The firing switch 19 of loom and shutdown switch 20 also link to each other with computer C.
Computer is controlled the switching of electromagnetic contactor 15,16,17 according to what prevent that crosspiece from producing by Fig. 2 and flow chart shown in Figure 3.
When the electric power starting of loom, the specified speed of gyration Vo of computer C during according to the loom steady running calculates in the initial setting target arteries and veins To (step 1, hereinafter to be referred as S1, other step is provided with too) at interval.So-called initial setting target pulse interval T o uses the pulse spacing of output from rotary encoder 18 to represent the required time of conversion from the triangle link circuit to the Y-connection loop.Initial setting target pulse interval T o and the loom pulse spacing from rotary encoder 18 outputs with specified speed of gyration Vo running the time equates.If consistent with target pulse interval T o from the pulse spacing of rotary encoder 18 outputs, then loom will be with specified speed of gyration Vo running.
If firing switch 19 is connected and the output initiating signal, then computer (response, the data of target pulse interval T i by the record of computer C itself judge be or deny (S2, S3).So-called target pulse interval T 1 is exactly last in the pulse spacing of being adopted when the triangle link circuit converts the Y-connection loop to, and computer C is keeping the memory to this target pulse interval T i.
Under the situation that last target pulse interval T i is not once put down in writing, computer C adopts initial setting target pulse interval T o as target pulse interval T i (S4).
Under the situation that last target pulse interval T i is once put down in writing, computer C compares (S5) with the size of initial setting target pulse interval T o and minimum pulse interval t1.Minimum pulse at interval t1 be exactly last once from the triangle link circuit in the fiducial time of Y-connection loop conversion from the minimum interval in burst length of rotary encoder 18 outputs, and with corresponding at the maximum speed of gyration V1 of the loom of said reference in the time.Computer C writes this minimum pulse t1 at interval, and simultaneous computer C also writes down the burst length largest interval t2 that exports from rotary encoder 18 in the time in said reference.Maximum impulse at interval t2 with said reference in the time the minimum speed of gyration V2 of loom corresponding.
Under the situation of target setting pulse spacing To greater than minimum pulse interval t1, computer C adopts (Ti+ δ t) as pulse spacing Ti (S7) in the early stage.Since time δ t be on the occasion of, previous pulse spacing Ti will increase to changing to (Ti+ δ t).In other words, t1 is also little than target pulse interval T o at interval for last minimum pulse when change to the Y-connection loop from the triangle link circuit, so at the maximum speed of gyration V of said reference loom in the time
1Still, this time also can shift to an earlier date than the last time from the conversion period of triangle link circuit to the Y-connection loop than under the big situation of specified speed of gyration Vo.
Target setting pulse spacing To is positioned at minimum pulse at interval under the following situation of t1 in the early stage, computer C the size of target pulse interval T o and maximum impulse interval t2 is compared (S5, S6).Also than the little occasion of maximum impulse interval t2, computer C adopts (Ti-δ t) as pulse interval Ti, and changes (S8) with the pulse spacing Ti with the last time to the mode that (Ti-δ t) reduces at target pulse interval T o.In other words, last once from the maximum impulse of triangle link circuit when change in the Y-connection loop at interval t2 also than the big occasion of target pulse interval T o, just in the said reference time the minimum speed of gyration V2 of loom also than specified speed of gyration Vo little occasion, this time once also lag than preceding the conversion time from the triangle link circuit to the Y-connection loop.
Be under the situation of unanimity at target pulse interval T o, minimum pulse interval t1 and maximum impulse interval t2, computer C adopts the form (S9) that does not change last go back to target pulse interval T i conduct target pulse interval this time.
Adopt after the above-mentioned target pulse interval T i, computer C starts selection according to triangle link circuit or Y-connection loop.When starting, under the situation about fabric being exerted an influence, during for example owing to situations such as warp thread disconnect, workbench is restarted after stopping, select to start by the triangle link circuit because the power of beating up is not enough.In when starting because the power of beating up is not enough and situation about fabric not being exerted an influence under, for example because weft yarn enters error, stop the back at workbench and correct and to knit front position (beginning to form the position of fabric) once more during situation such as start, select the Y-connection loop to start.
In the occasion of being started by the triangle link circuit, computer C measures the interval T x (S9A among Fig. 2 and Fig. 3, S10 and S11) of this output pulse according to the pulse of output from rotary encoder 18.If the pulse spacing Tx that is measured has reached target pulse interval T i, then computer C sends specified running instruction, promptly orders from the triangle link circuit to Y-connection loop conversion (S12, S13 and S14).If this target pulse interval T i is suitable, before beating up at first after the loom running beginning, the speed of loom has just reached rated speed degree Vo so.Therefore, along with triangle link circuit again to the conversion in Y-connection loop, even the speed of gyration of motor M (speed of gyration of loom) descends, and under specified speed of gyration Vo state, also can beat up.That is to say the overspeed that when starting, produces weaving machine turning speed by the triangle link circuit.Utilize this method, along with from the triangle link circuit to the conversion in Y-connection loop and loom is returned, the decline of rotary speed is limited in the specified speed of gyration Vo of loom, occurs producing greater than the caused crosspiece of required decline thereby can eliminate because of weaving machine turning speed.
If set as described above at interval from the target pulse of triangle link circuit when change in the Y-connection loop, even then when specified speed of gyration, running load, loom drive capacity with motor, running beginning, under the vicissitudinous situations such as angle of revolution of workbench, can not obtain good operation platform rising characteristic to adjusting from the triangle link circuit to Y-connection loop conversion period yet.
Beginning to through the time till the said reference time to the moment of Y-connection loop conversion from the triangle link circuit, computer C carries out minimum pulse t1 and the maximum impulse mensuration of t2 at interval at interval, and with its deposit in memory (Fig. 3, S15).
The pulse spacing Tx that is measured is provided with under the situation that reaches target pulse interval T i in official hour, also carries out after the described stipulated time from the conversion (S12, S13 and S14) of triangle link circuit to the Y-connection loop.And should be exactly by the starting of triangle link circuit the stipulated time, make the load of motor be configured to the not superfluous time.
If shutdown switch 20 is connected, or stop signal input to computer C because anomaly takes place, then computer C output operation halt instruction and open the Y-connection loop (S16, S17).Then with automatic or manual initiating signal is input among the computer C, computer C detects whether the variation of specified speed of gyration is arranged, and the selection that begins above-mentioned target pulse interval T i once more set (S18, S1).
The present invention is not subjected to the restriction of previous embodiment certainly, for example both can change a little, the target speed of gyration in the time of also can only changing to the Y-connection loop from the triangle link circuit with the value conduct of initial setting from specified speed of gyration from the target speed of gyration of triangle link circuit when change in the Y-connection loop.
In the present invention of above detailed description, the overvoltage of the rated voltage that applies was applied to the loom driving with under the situation on the motor when loom when starting will surpass its specified moving commentaries on classics, again it is applied state from overvoltage and be transformed into rated voltage and apply state when the speed of gyration of loom reaches the speed of regulation.Therefore, be accompanied by from overvoltage and apply state applies conversion from state to rated voltage, the decline of motor speed of gyration can be suppressed to the degree of steady turning speed, and beating up at first after motor stabilizing turns round beginning under the speed of gyration, thereby reach the excellent results that prevents that crosspiece from producing.
Claims (5)
1, a kind of starting method of loom, it is characterized in that: when loom starts, to be applied on this motor above the overvoltage that loom drives with the motor rated voltage, and after starting, detect the speed of gyration of loom, when the speed of gyration of loom reaches the speed of regulation, apply state from overvoltage again and convert rated voltage to and apply state motor.
2, a kind of starting device of loom, it comprises: loom drives with motor, rated voltage is applied to Y-connection loop on this motor, overvoltage is applied to triangle link circuit on this motor, by using selectively in the loom that these two kinds of loops turn round, it is characterized in that it also has:
Detect the speed detector of weaving machine turning speed;
Compare according to detection speed that draws from this speed detector and predefined weaving machine turning speed, control is transformed into the conversion control device of the use in described Y-connection loop from the use of described triangle link circuit.
3, according to the described loom starting device of claim 2, it is characterized in that: it also comprises the promising input unit that preestablishes the speed of gyration of loom and be provided with, and this input unit is connected with above-mentioned conversion control device.
4, according to the described loom starting device of claim 3, it is characterized in that: described speed detector comprises the encoder of output and the corresponding pulse signal of loom work table rotation angle.
According to the described loom starting device of claim 4, it is characterized in that 5, described conversion control device is made of computer, it comprises:
Record is from the note cryopreservation device in the time interval of the pulse signal of described encoder input;
The comparison means that pulse spacing of described note cryopreservation device record and the pulse spacing that is obtained by the converting means place are compared;
According to the comparative result of described comparison means, to the output device of described triangle link circuit or Y-connection loop output control signal to two pulses.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP314853/91 | 1991-11-28 | ||
| JP31485391A JP3173076B2 (en) | 1991-11-28 | 1991-11-28 | Starting method and apparatus in loom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1072743A CN1072743A (en) | 1993-06-02 |
| CN1037988C true CN1037988C (en) | 1998-04-08 |
Family
ID=18058404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92109743A Expired - Fee Related CN1037988C (en) | 1991-11-28 | 1992-07-31 | Method and apparatus for starting looms |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3173076B2 (en) |
| CN (1) | CN1037988C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152679A (en) * | 1998-11-10 | 2000-05-30 | Murata Mach Ltd | Motor-controlling device and method |
| DE10236095B3 (en) * | 2002-08-07 | 2004-02-05 | Lindauer Dornier Gesellschaft Mbh | Loom operation with a number of drives, initially runs the main drive at a slower speed on start-up until it reaches working levels, while the shed drive is accelerated to its working speed and is braked slowly on stopping |
| JP5765118B2 (en) * | 2011-07-28 | 2015-08-19 | 株式会社豊田自動織機 | Operation control apparatus and operation control method for loom |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751846A (en) * | 1980-09-12 | 1982-03-26 | Tsudakoma Ind Co Ltd | Loom operating method and apparatus |
| JPS58132145A (en) * | 1982-01-27 | 1983-08-06 | 津田駒工業株式会社 | Operation of loom |
| JPS59173342A (en) * | 1983-03-19 | 1984-10-01 | 日産自動車株式会社 | Apparatus for changing over operation of motor for driving loom |
-
1991
- 1991-11-28 JP JP31485391A patent/JP3173076B2/en not_active Expired - Lifetime
-
1992
- 1992-07-31 CN CN92109743A patent/CN1037988C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5751846A (en) * | 1980-09-12 | 1982-03-26 | Tsudakoma Ind Co Ltd | Loom operating method and apparatus |
| JPS58132145A (en) * | 1982-01-27 | 1983-08-06 | 津田駒工業株式会社 | Operation of loom |
| JPS59173342A (en) * | 1983-03-19 | 1984-10-01 | 日産自動車株式会社 | Apparatus for changing over operation of motor for driving loom |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3173076B2 (en) | 2001-06-04 |
| CN1072743A (en) | 1993-06-02 |
| JPH05148743A (en) | 1993-06-15 |
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