CN1572931A - Shedding control method and device of a loom - Google Patents
Shedding control method and device of a loom Download PDFInfo
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- CN1572931A CN1572931A CN 200410034153 CN200410034153A CN1572931A CN 1572931 A CN1572931 A CN 1572931A CN 200410034153 CN200410034153 CN 200410034153 CN 200410034153 A CN200410034153 A CN 200410034153A CN 1572931 A CN1572931 A CN 1572931A
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- heald frame
- interval
- rotation
- rotary speed
- eccentric part
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C13/00—Shedding mechanisms not otherwise provided for
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C13/00—Shedding mechanisms not otherwise provided for
- D03C13/02—Shedding mechanisms not otherwise provided for with independent drive motors
- D03C13/025—Shedding mechanisms not otherwise provided for with independent drive motors with independent frame drives
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Abstract
The invention improves the weaving performance of a loom by setting the cross-point P of a heald frame group at the geometrical middle position.An electric motor for a heald frame is rotated at the 1st rotating speed in the 1st zone between the intermediate rotation position of the eccentric part of a crank corresponding to the heald frame positioned at an intermediate position between the uppermost position and the lowermost position and the upper dead point position of the eccentric part corresponding to the uppermost position of the heald frame, and rotated at the 2nd rotating speed different from the 1st rotating speed in the 2nd zone between the intermediate rotation position and the lower dead point position of the eccentric part corresponding to the lowermost position of the heald frame. The magnitude relation of the 1st rotating speed and the 2nd rotating speed is made to correspond to the magnitude relation of the 1st zone and the 2nd zone.
Description
Technical field
The present invention relates to a kind of shedding control method and device that on loom, forms the shedding motion of Warp opening.
Background technology
In this manual, fore-and-aft direction refers to the warp thread moving direction that the warp let-off causes, above-below direction refers to the moving direction of heald frame.Front side and rear side refer to the dirty and upper reaches at the warp thread moving direction respectively, a left side and part dirty left side of seeing and the right side that does not refer to from the warp thread moving direction on the right side.Upper limit position and lower position refer to respectively move up and down the position that is positioned at the upper limit in the scope and prescribes a time limit down at heald frame.Geometric centre position refers to the upper limit position of heald frame and the geometric centre position between the lower position.
Existing shedding device of weaving machine is opened (Fig. 3) 2000-80533 number as the Japan Patent spy, and some heald frames are divided into first and second heald frame group, and first and second heald frame group is moved up and down, and forms Warp opening.In this shedding motion, utilize power-supply change-over mechanism that heald frame is moved up and down, this power-supply change-over mechanism comprises the gear wheel with eccentric part, the heald frame that each heald frame is located in this eccentric part utilization rotates to a direction with motor.This shedding motion is to comprise rocking bar, connecting rod and as the gear of crank effect, rotation motion is changed to reciprocating 4 pitch chain bars.
Usually, rotation motion is changed to reciprocating 4 pitch chain bars, as shown in Figure 3, rotatablely moving of pivot (being pin 48 in Fig. 3) can be utilized Connection Element (in Fig. 3, being Connection Element 44) be transformed to the reciprocating motion of rocking bar (in Fig. 3, being rocking bar 28).Wherein this pivot can rotate on every side at the output shaft (symbol is 40 in Fig. 3) of rotary driving source, and this rocking bar can joltily be supported in back shaft (being back shaft 34 in Fig. 3) on every side.
Shedding motion utilizes the amount of movement of the heald frame that sensor moves up and down, and to detected amount of movement and desirable heald frame amount of movement relatively, the phase angle of the heald frame behind the revisal loom setting in motion during certain is consistent with predefined opening curve.
But, when heald frame was positioned at geometric centre position, one and another position of rotation of pin 48 as shown in Figure 3, were not to be the center symmetric position at center with output shaft 40.Therefore, shown in the comparative example 1 (chain-dotted line) of Fig. 4, first and second heald frame group that above-below direction moves has the locational crosspoint P different with geometric centre position.
In addition, shown in the comparative example 2 (chain-dotted line) of Fig. 5, for the position of the crosspoint P that makes first and second heald frame group is positioned at geometric centre position, and with the heald frame of the first heald frame group with the rotatable phase angle of the output shaft of the motor certain angle that staggers, like this, the position of a crosspoint P can be near geometric centre position, and geometric centre position can more be departed from the position of another crosspoint P.
Therefore, if the crosspoint of heald frame group can not be set in geometric centre position, will influence weavability.
Summary of the invention
The objective of the invention is to above-mentioned deficiency, propose a kind of crosspoint P and be set in geometric centre position, the shedding control method of the loom that weavability is good and device the heald frame group at prior art.
Above-mentioned purpose of the present invention is achieved through the following technical solutions: shedding control method of the present invention and device are applicable to the control that utilizes crank mechanism to make the shedding motion of the loom that the heald frame group moves up and down, this crank mechanism has eccentric part, and this eccentric part can utilize the heald frame of being located at each heald frame to rotate to a direction with motor.
Shedding control method can make eccentric part rotate with first rotary speed in first interval, and it is rotated with second rotary speed different with first rotary speed in second interval.The middle position of rotation that this first interval refers to heald frame corresponding eccentric part when the centre position of upper limit position and lower position is with heald frame during at upper limit position between the top dead-centre position of rotation of corresponding eccentric part.This second interval refer to heald frame correspondence when the lower position eccentric part the bottom dead centre position of rotation and above-mentioned in the middle of between the position of rotation.Make magnitude relationship between first rotary speed and second rotary speed corresponding to the magnitude relationship in first interval and second interval.
The opening control device includes control part, and this control part can make eccentric part rotate with first rotary speed in first interval, and it is rotated with second rotary speed different with first rotary speed in second interval.The middle position of rotation that this first interval refers to heald frame corresponding eccentric part when the centre position of upper limit position and lower position is with heald frame during at upper limit position between the top dead-centre position of rotation of corresponding eccentric part.This second interval refer to heald frame correspondence when the lower position eccentric part the bottom dead centre position of rotation and above-mentioned in the middle of between the position of rotation.This control part can make magnitude relationship between first rotary speed and second rotary speed corresponding to the magnitude relationship in first interval and second interval.
Here, interval size is meant interval angular dimension, promptly interval angle, the anglec of rotation that the eccentric part moving section needs, the i.e. necessary rotation amount in the interval of eccentric part.
With the magnitude relationship of first and second rotary speed corresponding to first and second length of an interval degree relation, eccentric part in big interval than fast in little interval rotary speed.Like this, heald frame reaches the crosspoint of the contrary opening frame that oppositely moves therewith near geometric centre position, thereby improves the weavability of loom.
The mean value of first rotary speed can be corresponding to the ratio of first interval with the second interval size with the ratio of the mean value of second rotary speed.
Heald frame in first interval is set by each heald frame with the rotary speed of motor with the heald frame in second interval with the rotary speed of motor.
Compare with prior art, the present invention has following beneficial effect: the crosspoint P of heald frame group is set in geometric centre position, and weavability is good.
Description of drawings
Fig. 1 is the front elevation with loom of shedding motion of the present invention;
Fig. 2 is the circuit diagram of loom shown in Figure 1;
Fig. 3 is the structural representation of shedding motion shown in Figure 1;
Fig. 4 is the heald frame position moving curve of opening control technology of the present invention, and the heald frame position moving curve of prior art is represented with comparative example 1.
Fig. 5 is embodiment shown in Figure 4 and the heald frame position that will have the opening control technology now the heald frame moving curves of 2 expressions as a comparative example.
Fig. 6 is in the expression shedding control method shown in Figure 4, supplies with the umber of pulse of motor output shaft.
Fig. 7 is based on the figure of the rotary speed control of the motor different with opening control technology shown in Figure 6.
Wherein, S1 is the running setting signal; S2 is the main axis rotation signal; S3 is a main axis rotation angle signal; S4 is the opening signal; S51, S52 ..., S5n is that heald frame drives signal; S6 is the opening setting signal; S71, S72 ..., S7n is the motor rotary angle signal; 10 is shedding motion; 12 is loom; 14,16,20 is framework; 18 is heald frame; 22 is supporting mechanism; 24,26 is the driving mechanism group; 28 is rocking bar; 30 is the chain bar; 32 is connecting rod; 34 is back shaft; 36 is support; 38 is motor (servomotor); 40 is output shaft; 42 is eccentric joint; 44 is Connection Element; 46 is pivot; 48 is pin; 50 is arm; 52 is the opening control device; 56 is servo amplifier; 58 is encoder; 60 is main control unit; 62 is the loom input/output unit; 64 is spindle drive motor; 66 is main shaft; 68 is encoder; 70 is the opening control circuit.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
To shown in Figure 5, some heald frames 18 are the fore-and-aft direction arranged spaced between the framework (pillar) 14,16 of loom about 12 as Fig. 1, and shedding motion 10 moves back and forth these heald frames 18 and configuration harness cord thereon on above-below direction, thereby forms Warp opening.
As shown in Figure 1, framework 14,16 utilizes framework (crossbeam) 20 connections up and down, and heald frame 18 utilizes not shown support component above-below direction to be supported in movably on the framework 14,16,20.
Some heald frames 18 are divided into first and second heald frame group that contains some heald frames 18 respectively.First and second heald frame group has when moving up for one, and another moves down such main axis rotation angle and is 180 ° the relation that moves up and down.In addition, first and second heald frame group intersects at crosspoint P shown in solid line among Fig. 4 and Fig. 5, and the opening amount of warp thread is zero.
Shedding motion 10 comprises that heald frame 18 is that have and can support some supporting mechanisms 22 of corresponding heald frame 18 up or down and distinguish corresponding some driving mechanisms with this supporting mechanism 22.
Supporting mechanism 22 is divided into first and second supporting mechanism group according to the group under the heald frame 18 of correspondence.Similarly, driving mechanism is first and second driving mechanism group 24 and 26 according to the heald frame 18 of correspondence and the component under the supporting mechanism 22 also.
The supporting mechanism 22 of the first supporting mechanism group corresponds respectively to the heald frame 18 of the first heald frame group and the driving mechanism of the first driving mechanism group 24, by the drive mechanism of correspondence, corresponding heald frame 18 is moved at above-below direction.
The supporting mechanism 22 of the second supporting mechanism group corresponds respectively to the heald frame 18 of the second heald frame group and the driving mechanism of the second driving mechanism group 26, by the drive mechanism of correspondence, corresponding heald frame 18 is moved at above-below direction.
Each supporting mechanism 22 is well known organizations, and the chain bar 30 that its rocking bar 28 with the pairing left and right of V word shape or Y word shape utilizes left and right directions to extend connects, the connecting rod 32 that utilizes above-below direction to extend each rocking bar 28 be connected to corresponding heald frame 18 about.
The rocking bar 28 that is positioned at the left side is V word shape, and the rocking bar 28 that is positioned at the right side is Y word shape.Two rocking bars 28 articulate at a leading section and the chain bar 30 of V word or Y word, in another leading section and connecting rod 32 pivot joints of V word or Y word.
The rocking bar 28 and 28 on left side and right side is a branching portion at the base portion of V word or Y word respectively, can joltily be articulated in common left side and right side back shaft 34 and 34 of rocking bar group on left side and right side in the face of above-below direction and left and right directions extension.
Left and right sides back shaft 34 and 34 utilizes stent support respectively on right side frame 16 and underframe 20 in 14,16 direction extensions forwards, backwards of framework.Therefore, some rocking bars 28 and 28 utilize left and right sides back shaft 34 and 34 to be articulated in board.
Connecting rod 32 makes the interior element of screw hole of an end precession long nut of screw rod.Connecting rod 32 above-below directions extend configuration, and its upper end is articulated in heald frame 18, and its bottom is articulated in rocking bar 28.
The driving mechanism of driving mechanism group 24,26 comprises motor 38, is assembled to the eccentric joint 42 of the output shaft 40 of motor 38, and the Connection Element 44 of an end and the length of eccentric joint 42 pivot joints.Wherein this motor 38 is the such drive sources of servomotor, extends before and after its rotation, utilizes support 36 to be assembled to right side frame 16.
Each Connection Element 44 is the long plate shape element, in its other end, utilizes the arm 50 of supporting pivot 46 to be connected to the remaining leading section of Y word of corresponding right side rocking bar 28, utilizes pivot 46 to shake in the face that above-below direction and left and right directions extend.Arm 50 utilizes bolt to be installed on the rocking bar 28, is adjustable to the distance of back shaft 34.Arm 50 utilizes the distance of adjusting with back shaft 34, changes the angle of shaking of rocking bar 28, adjusts the amount of exercise (opening amount) of heald frame 18.
Each eccentric joint 42 fore-and-aft direction is seen and is discoideus.The embedded hole of each eccentric joint 42 (not shown) can not be chimeric with the relative rotation to output shaft 40.Each eccentric joint 42 has pin 48 with respect to the position of output shaft 42 off-centre, utilizes pin 48 can joltily assemble an end of Connection Element 44.
Therefore, constitute crank mechanism with eccentric part (pin 48) with respect to output shaft 40 off-centre.This crank mechanism is changed to the reciprocating motion changing mechanism effect of Connection Element 44 as the rotation motion with motor 38.
Connecting the pivot of heald frame 18 and connecting rod 32, the pivot that is connected connecting rod 32 and rocking bar 28, the pivot that is connected rocking bar 28 and chain bar 30, the axis that reaches the pivot that is connected rocking bar 28 and Connection Element 44 all extends from fore-and-aft direction.
First and second driving mechanism group 24 and 26 motor 38, the state group of extending with its output shaft 40 fore-and-aft directions is filled to support 36, disposes up and down.Each motor 38 utilizes eccentric joint 42 and Connection Element 44 to be connected to corresponding supporting mechanism 22.
Each motor 38 its direction of rotation can be set at from the dirty either direction of seeing in clockwise (being the cw direction among Fig. 3) and counterclockwise (being the ccw direction among Fig. 3) of warp thread moving direction.In the present embodiment, be set at counterclockwise.
As shown in Figure 2, opening control device 52 comprises and is used to drive corresponding to the servo amplifier 56 of the motor 38 of each heald frame 18 and detects the encoder 58 of the anglec of rotation of the output shaft 40 of each motor 38.
The main control unit 60 output spindle drive motors 64 of loom 12 turn round, stop, the main axis rotation signal S2 of slow-action etc.Spindle drive motor 64 makes main shaft 66 rotations based on main axis rotation signal S2.
Encoder 68 detects the anglec of rotation α of main shaft 66, and S3 exports main control unit 60 and opening control circuit 70 to as main axis rotation angle signal.
Loom input/output unit 62 is imported the running of loom such as loom rotation number and is set value with the opening of the anglec of rotation of the main shaft 66 of setting value, opening parameter, opening amount, angle of repose, crosspoint P etc. by the operator.Loom input/output unit 62 as running setting signal S1 and opening setting signal S6, exports these information (setting value) to main control unit 60 and opening control circuit 70 respectively.
The necessary rotation amount of the output shaft 40 in opening control device 70 input 4 intervals shown in Figure 3 (B1, B2, B3, B4), this necessity rotation amount is measured according to the opening amount in advance by each heald frame 18.
Opening control circuit 70 is based on the information such as main shaft 66 anglecs of rotation of the opening parameter of opening setting signal S6, opening amount, angle of repose, crosspoint P, the rotary speed (rotary speed of servomotor 38) of interval (B1, B2, B3, B4) is calculated by each heald frame 18, drive signal S51 as heald frame based on the main axis rotation angle signal S3 of encoder 68, S5i,, S5n (i: heald frame number) exports servo amplifier 56 to.
Each servo amplifier 56 drives signal S51 based on heald frame ..., S5i ..., S5n drives heald frame with motor 38, and heald frame 18 is moved up and down.
Each encoder 58 detects the anglec of rotation of the output shaft 40 of corresponding motor 38, with the detected anglec of rotation as motor rotary angle signal S71 ..., S7i ..., S7n exports opening control device 70 to.Opening control device 70 utilizes the position of FEEDBACK CONTROL control motor 38.Specifically, opening control circuit 70 is tried to achieve the anglec of rotation of output shaft 40 and the deviation of its desired value based on main axis rotation angle signal S3 from the motor rotary angle signal S7 that imports, in the rotary speed of the direction increase and decrease motor 38 of removing deviation.
In the present embodiment, opening control circuit 70 drives signal S51 with the heald frame in 40 1 weeks of rotation of output shaft of 66 2 weeks of rotation of main shaft, motor 38 ..., S5i ..., S5n exports servo amplifier 56 (furtherly, motor 38) to.
As shown in Figure 3, output shaft 40 rotates a circle, and rocking bar 28 only back and forth shakes once in the scope of anglec of rotation γ around back shaft 34.Like this, heald frame 18 is along with rocking bar 28 shakes, and utilizes connecting rod 32 only to move back and forth with distance L at above-below direction.
Be positioned at the geometric centre position (with reference to Fig. 3 and Fig. 4) of heald frame 18 in the centre of the displacement L of the heald frame 18 of above-below direction.
In the present embodiment, be half of from upper limit position anglec of rotation γ in the anglec of rotation to the lower position from the upper limit position of heald frame 18 rocking bar to the lower position 28 to geometric centre position and from geometric centre position.
As shown in Figure 3, in the present embodiment, the middle position of rotation in the time of will being called top dead-centre position of rotation, middle the position of rotation when descending, bottom dead centre position of rotation and rising as the position of rotation that heald frame 18 moves the pin 48 of the eccentric part when being positioned at upper limit position, geometric centre position, lower position and geometric centre position successively.
As shown in Figures 3 and 4, the middle position of rotation the when rotating range of output shaft 40 can be based on the bottom dead centre position of rotation of pin 48, middle position of rotation, top dead-centre position of rotation when rising and decline is divided into interval B 1, B2, B3 and B4.
The zone of the position of rotation (bottom dead centre position of rotation) of the pin 48 of correspondence position of rotation (the middle position of rotation during rising) of the pin 48 of correspondence when heald frame 18 is positioned at geometry centre position when interval B 1 expression heald frame 18 is positioned at the lower position.
The zone of the position of rotation (the middle position of rotation during rising) of the pin 48 of correspondence position of rotation (top dead-centre position of rotation) of the pin 48 of correspondence when heald frame 18 is positioned at upper limit position when interval B 2 expression heald frames 18 are positioned at the geometry centre position.
The zone of the position of rotation (top dead-centre position of rotation) of the pin 48 of correspondence position of rotation (the middle position of rotation during decline) of the pin 48 of correspondence when heald frame 18 is positioned at geometry centre position when interval B 3 expression heald frames 18 are positioned at upper limit position.
The zone of the position of rotation (the middle position of rotation during decline) of interval B 4 expression pin 48 of correspondence when heald frame 18 is positioned at geometry centre position position of rotation (bottom dead centre position of rotation) of the pin 48 of correspondence when heald frame 18 is positioned at the lower position.
Because each interval B 1, B2, B3 and B4 have different angular ranges promptly to have the necessary rotation amount of pin 48, so at opening control circuit 70, the value of the average rotary speed of the output shaft 40 of each interval B 1, B2, B3 and the mutually different motor 38 of B4 is set by heald frame 18 (being motor 38).
Specifically, it is fast to be set in the big regional rotary speed of certain rotation amount of pin 48 at opening control circuit 70, slow in little regional rotary speed.Like this, the bottom dead centre position of rotation of pin 48 with arbitrarily in the middle of between position of rotation in case of necessity between and the top dead-centre position of rotation with arbitrarily in the middle of between position of rotation in case of necessity between all the same, the close geometric centre position of crosspoint P.
The angular range of each interval B 1, B2, B3 and B4 is by with respect to decisions such as the length of the position of the motor 38 of heald frame 18, Connection Element 44 and opening amounts, because of each heald frame different.
Specifically, as shown in Figure 4, because be 66 2 weeks of rotation of main shaft, the relation in 40 1 weeks of rotation of output shaft, necessary rotation amount α 1, α 2, α 3 and the α 4 of the main shaft 66 of interval B 1, B2, B3 and B4 correspondence are 180 °.
Try to achieve by formula (1) than am in each rotary speed with respect to the output shaft 40 of the interval B 1 of the rotary speed of main shaft 66, B2, B3, B4:
am＝βm/αm????(1)
Here, m represents interval number (1 to 4), β m be illustrated in the output shaft 40 of interval B m the anglec of rotation (°), promptly as the necessary rotation amount of the pin 48 of eccentric part, α m represents corresponding to the necessary rotary speed of interval B m main shaft 66 (in the present embodiment, be 180 °), am represents the rotary speed ratio corresponding to the output shaft 40 of the rotary speed of the main shaft 66 of interval B m.Rotary speed is that output shaft 40 can be to be the am rotary speed rotation doubly of main shaft 66 rotary speeies than the meaning of am.
Utilize formula (1), for example: as shown in Figure 3, when the value of the necessary anglec of rotation β 2 of the output shaft 40 of interval B 2 and B4 and β 4 is respectively 105 ° and 75 °, because the necessary anglec of rotation α 2 and the α 4 of the main shaft 66 of interval B 2 and B4 correspondence are 180 °, be 0.583 and 0.417 so rotary speed utilizes formula (1) to try to achieve respectively than a2 and a4.
Therefore, opening control circuit 70 drives servomotor 38 at the heald frame driving signal S5i that interval B 2 and B4 export 0.583 and 0.417 times the rotary speed that is main shaft 66 rotary speeies respectively.
Like this, each interval rotary speed Billy of servomotor 38 is set at certain rotation amount ratio in each interval of pin 48 with the rotary speed of main shaft 66.Heald frame 18 between upper limit position and geometry centre position in case of necessity between, between lower position and geometry centre position in case of necessity between identical, these in case of necessity between with the main axis rotation half cycle in case of necessity between identical.Therefore, each heald frame 18 arrives geometric centre position when main shaft 66 rotation half cycles.Heald frame 18 with respect to these heald frame 18 contrary openings is set too.Because each heald frame 18 arrives geometric centre position when main shaft 66 rotation half cycles, so the crosspoint P of the heald frame 18 of contrary opening is positioned at geometric centre position.
Fig. 4 and Fig. 5 are the moving curves of a heald frame 18 of the heald frame 18 of the first heald frame group and the second heald frame group.Solid line among Fig. 4 and Fig. 5 is a present embodiment.As previously mentioned, the comparative example 2 represented of the comparative example 1 represented of the dotted line among Fig. 4 and the dotted line among Fig. 5 all is a prior art.The rotary speed of the servomotor of comparative example 1 and comparative example 2 is interval constant promptly identical at each, so crosspoint P is not positioned at geometric centre position or constantly change.
Heald frame drives signal S5 and contains pulse, and motor (servomotor) 38 is supplied with the pulse of servo amplifiers 56 based on shedding motion device 70 and controlled.
As mentioned above, 0.583 and 0.417 times of rotary speed of main shaft 66 at interval B 2 and B4 for the rotary speed that makes output shaft 40, the pulse number of supplying with motor 38 preferably is determined as follows.
The generation of supplying with the umber of pulse of motor 38 has the relation shown in the formula (2).Formula (2) deformable is formula (3).
q·Pm×180°/φ＝βm??????(2)
Pm＝βm·φ/(q×180°)????(3)
Here, the anglec of rotation of the output shaft 40 of q representation unit pulse (°/pulse), in the present embodiment, be set at 0.4.φ represents the unit rotation amount of main shaft 66.That is, main shaft 66 rotation anglec of rotation φ (°), the pulse that will produce some.The pin 48 of β m (m=1,2,3,4) expression interval B m (m=1,2,3,4), be output shaft 40 necessary rotation amount (°).Pm (m=1,2,3,4) be illustrated in interval B m by the anglec of rotation φ of main shaft 66 (°) certain pulse number of producing.
Utilize formula (3), try to achieve by main shaft 66 and only rotate umber of pulse P 15 ° (φ=15 °), that supply with motor 38.Utilize formula (3), try to achieve umber of pulse P2=21.9 22, umber of pulse P4=15.6 16.
As shown in Figure 6, during in the rotating range A2 of the main shaft 66 of interval B 2 and B4 correspondence and A4 rotation, the anglec of rotation φ of main shaft 66 whenever advances 15 ° at main shaft 66, and the heald frame that opening control device 70 is just exported 22 pulses and 16 pulses respectively drives signal S5i.
The rotary speed that is pre-set in opening control circuit 70 can be calculated at opening control device 70, also can calculate at loom input/output unit 62.
Described above, the rotary speed of the output shaft 40 of interval B 1, B2, B3 and B4 is set at certain value.But, in order to carry out picking really, during picking, Warp opening is bigger.Like this, for prolong first and second heald frame group be positioned at respectively near upper limit position and the lower position during, as described below, respectively interval B 1, B2, B3 and B4 are divided some minizones again, set umber of pulse Pm, the i.e. rotary speed of motor 38 according to each minizone.
Interval A1 (the necessary rotation amount of main shaft 66 is α 1) corresponding to the main shaft 66 of interval B 1, B2 is divided into k minizone A11 respectively with interval A2 (the necessary rotation amount of main shaft 66 is α 2) ..., A1j ..., A1k and minizone A21 ..., A2j ..., A2k.The necessary rotation amount of the main shaft 66 of the minizone of interval A1 and the minizone of interval A2 is respectively α 1/k and α 2/k.Interval B 1 and B2 also correspond respectively to the minizone A11 of interval A1 ..., A1j ..., the minizone A21 of A1k and interval A2 ..., A2j ..., A2k is subdivided into minizone B11 ..., B1j ..., the minizone B21 of B1k and interval A2 ..., B2j ..., B2k.
The anglec of rotation β 1 and the minizone B11 of interval B 1 ..., B1j ..., the anglec of rotation β 11 of B1k ..., β 1j ..., β 1k has the relation shown in the formula (4).
β1＝β11+β12+…+β1j+…+β1k????(4)
Here, the necessary anglec of rotation of β 1 expression interval B 1 output shaft 40, β 11, and β 12 ..., β 1j ..., β 1k represents k minizone B11 corresponding to interval B 1 division ..., B1j ..., the necessary anglec of rotation of the output shaft 40 of B1k.
As previously mentioned, the necessary rotation amount of the main shaft 66 of minizone A1j is α 1/k, and the rotary speed of the output shaft 40 of B1j between corresponding district (the necessary rotation amount of output shaft 40 is β 1j) is the value shown in the formula (5) with respect to the unit angle (promptly 1 °) of main shaft 66.
β1j/(α1/k)????(5)
In the present embodiment, the necessary rotation amount of each corresponding minizone than with the necessary rotation amount of interval B 1, B2 than consistent, but the necessary rotation amount of changeable part minizone.Therefore, the anglec of rotation β 2 of the output shaft 40 of interval B 2, as the formula (6), deployable is corresponding to minizone B21, B22 ..., B2j ..., the anglec of rotation β 21 of the output shaft 40 of B2k, β 22 ..., β 2j ..., β 2k.
β2＝(β2/β1)β11+(β2/β1)β12+…+(β2/β1)β1j+…+(β2/β1)β1k????(6)
The rotary speed of the output shaft 40 of minizone B2j (the necessary rotation amount of output shaft 40 is β 2j) is the value shown in the formula (7) with respect to the unit angle (promptly 1 °) of main shaft 66.
(β2/β1)β1j/(α2/k)????(7)
Specifically, for example, heald frame 18 in the lower position and the anglec of rotation of the main shaft 66 of upper limit position be 120 °, be 300 ° in the anglec of rotation of the main shaft 66 in geometric centre position.Like this, interval A1 and A2 are divided into 4 minizones (being k=4) respectively, are 45 ° corresponding to the anglec of rotation α of the main shaft 66 of a minizone.
Among the embodiment shown in the table 1 of back, in interval B 1, the necessary rotation amount β 11 that sets the output shaft 40 of minizone B11 is 15 °, and the difference of the necessary rotation amount of adjacent minizone is 2.5 °, but, also can be set at the different value based on result of the test.For example, the necessary rotation amount β 11 of the output shaft 40 of minizone B11 is less than 15 °, and the difference of the necessary rotation amount of adjacent minizone is greater than 2.5 °.
Moreover, the necessary rotation amount of the minizone of the number k of minizone, interval B 1, B2, and neighbor cell between necessary rotation amount difference be set at appropriate value based on result of the test.
The number k of minizone is different at interval A1, A2 and interval B 1, B2.For example: interval A1, A2 have 4 minizones, and interval B 1, B2 have 8 minizones, and the minizone of interval A1, A2 is corresponding to two minizones of interval B 1, B2.
The number k of minizone can be different at interval A1 and A2, also can be different with B2 in interval B 1.The minizone of interval A1, A2 can five equilibrium also five equilibrium not.For example: near heald frame 18 translational speeds minizone, geometric centre position with low uncertainty can be bigger.
Each value of formula (4), formula as hereinafter described (9) is described, increases by 2.5 ° (being β 11＜β 12＜β 13＜β 14) step by step to each the interval anglec of rotation β of direction near interval B 2.
Reach when between interval B 3 and the interval B 4 rising being arranged respectively between interval B 1 and the interval B 2 and the middle position of rotation in when decline, in addition, between interval B 2 and the interval B 3 and between interval B 4 and the interval B 1 top dead-centre position of rotation and bottom dead centre position of rotation (with reference to Fig. 3 and Fig. 4) are arranged respectively.
For the angular velocity of rotation that makes near the output shaft 40 top dead-centre position of rotation and the bottom dead centre position of rotation slower, during rising and near the angular velocity of rotation of the output shaft 40 of middle the position of rotation when descending very fast, in interval B 2, corresponding to anglec of rotation β 21, the β 22 of minizone B21, the B22 of output shaft 40, B23, B24, β 23, β 24 as the formula (10), the relation (with reference to Fig. 7) of β 21＜β 22＜β 23＜β 24 is arranged.In the example shown in the table 1, the necessary rotation amount β of minizone reduces 3.5 ° step by step to the direction near interval B 3.
β2＝(β2/β1)β11+(β2/β1)β12+…+(β2/β1)β1j+…+(β2/β1)β1k＝β2k+…+β2j+…+β22+β21????(8)
Each value of formula (4), (8) is the value shown in formula (9), (10).
β1＝75°＝β11+β12+β13+β14＝β11+(β11+2.5°)+(β11+5°)+(β11+7.5°)＝15°+17.5°+20°+22.5°????(9)
β2＝105°＝β24+β23+β22+β21＝β24+(β24+3.5°)+(β24+7°)+(β24+10.5°)＝21°+24.5°+28°+31.5°????(10)
Therefore, it for the rotary speed of the output shaft 40 that makes β 11 intervals 0.33 times of main shaft 66 rotary speeies, the rotary speed that reaches the output shaft 40 in β 21 intervals is 0.47 times of main shaft 66 rotary speeies, and opening control device 70 drives signal S51 with rotational speed signal as heald frame and exports servo amplifier 56 to.
Top result of calculation is as shown in table 1.Fig. 7 represents is rotary speed ratio with respect to the output shaft 40 of main shaft 66 rotary speeies.
Table 1
| Main axis rotation speed | ????120°～ ????165° | ???165°～ ???210° | ????210°～ ????255° | ???255°～ ???300° | ???300°～ ???345° | ???345°～ ???30° | ????30°～ ????75° | ????75°～ ????120° |
| Interval and the necessary rotation amount of output shaft | Interval B 1 (β 1=75 °) | Interval B 2 (β 2=105 °) | ||||||
| The minizone of output shaft | ????B11 | ???B12 | ????B13 | ???B14 | ???B24 | ???B23 | ????B22 | ????B21 |
| The necessary rotation amount of the output shaft of minizone | ????15° | ???17.5° | ????20° | ???22.5° | ???31.5° | ???28° | ????24.5° | ????21° |
| Output shaft is with respect to the rotary speed ratio of main shaft | ????0.33 | ???0.39 | ????0.44 | ???0.5 | ???0.7 | ???0.62 | ????0.54 | ????0.47 |
What illustrate is that heald frame 18 is divided into first and second heald frame group, but, based on the specification of fabric, also can divide one the 3rd heald frame group or more heald frame groups again.The rotary speed of the motor 38 of heald frame 18 correspondences of these heald frame groups also rotary speed with the corresponding motor 38 of first and second heald frame group is identical, and main shaft 66 rotation amounts during upper limit position moves to geometric centre position are 180 ° with main shaft 66 rotation amounts during the lower position moves to geometric centre position.
Connecting rod 32 is at left and right directions, is positioned at a side opposite with the driving mechanism group 24,26 of back shaft 34, also can be positioned at the same side with the driving mechanism group 24,26 of back shaft 34.
The scope of interval B 1, B2, B3, B4 is by decisions such as the configuration relation of the length of Connection Element 44, output shaft 40, opening amounts, and is therefore different because of heald frame 18.In view of the above, press the rotary speed that heald frame 18 is set output shaft 40.The opening amount of heald frame 18 changes because of the variation of loom 12 weaving conditions.
The invention is not restricted to the foregoing description, only otherwise break away from purport, can do numerous variations.
Claims (4)
1, a kind of shedding control method of loom, it utilizes crank mechanism that the heald frame group is moved up and down, this crank mechanism has eccentric part, this eccentric part can utilize the heald frame drive motor of being located at each heald frame to rotate to a direction, it is characterized in that: eccentric part is rotated with first rotary speed in first interval, rotate with second rotary speed different with first rotary speed in second interval; Wherein first interval refer to heald frame when the centre position of upper limit position and lower position in the middle of the corresponding eccentric part position of rotation with heald frame during at upper limit position between the corresponding eccentric part top dead-centre position of rotation; Second interval refers between the eccentric part bottom dead centre position of rotation and above-mentioned middle position of rotation of heald frame correspondence when the lower position; Make magnitude relationship between first rotary speed and second rotary speed corresponding to the magnitude relationship in first interval and second interval.
2, the shedding control method of loom according to claim 1 is characterized in that: the ratio of the mean value of first rotary speed and the mean value of second rotary speed is corresponding to the ratio of first interval with the size in second interval.
3, the shedding control method of loom according to claim 1 and 2 is characterized in that: the heald frame in first interval is set by each heald frame with the rotary speed of motor with the rotary speed of motor and the heald frame in second interval.
4, a kind of opening control device of loom, it utilizes crank mechanism that the heald frame group is moved up and down, this crank mechanism has eccentric part, this eccentric part can utilize the heald frame of being located at each heald frame to rotate to a direction with motor, it is characterized in that: include control part, this control part can make eccentric part rotate with first rotary speed in first interval, rotates with second rotary speed different with first rotary speed in second interval; Wherein first interval refer to heald frame when the centre position of upper limit position and lower position in the middle of the corresponding eccentric part position of rotation with heald frame during at upper limit position between the corresponding eccentric part top dead-centre position of rotation; Second interval refers between the eccentric part bottom dead centre position of rotation and above-mentioned middle position of rotation of heald frame correspondence when the lower position; This control part can make magnitude relationship between first rotary speed and second rotary speed corresponding to the magnitude relationship in first interval and second interval.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003169033A JP4008384B2 (en) | 2003-06-13 | 2003-06-13 | Loom opening control method and apparatus |
| JP2003169033 | 2003-06-13 | ||
| JPJP2003169033 | 2003-06-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1572931A true CN1572931A (en) | 2005-02-02 |
| CN100365181C CN100365181C (en) | 2008-01-30 |
Family
ID=33296898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100341534A Expired - Fee Related CN100365181C (en) | 2003-06-13 | 2004-04-26 | Shedding control method and device of a loom |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1486597B1 (en) |
| JP (1) | JP4008384B2 (en) |
| CN (1) | CN100365181C (en) |
| DE (1) | DE602004013882D1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864633A (en) * | 2009-04-14 | 2010-10-20 | 株式会社丰田自动织机 | Open device in weaving machine |
| CN102162160A (en) * | 2010-02-12 | 2011-08-24 | 施托布利法韦日公司 | Method for controlling electrical actuators of a shedding device |
| CN104032438A (en) * | 2014-06-18 | 2014-09-10 | 吴江万工机电设备有限公司 | Design method of six-rod shedding mechanism with long pause angle at lowest position of shed |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299443A (en) * | 2005-04-18 | 2006-11-02 | Tsudakoma Corp | Controlling device of moving member of loom |
| JP2007009355A (en) * | 2005-06-29 | 2007-01-18 | Tsudakoma Corp | Electric shedding machine of loom |
| EP3341510B1 (en) | 2015-08-26 | 2020-03-04 | Picanol | Drive mechanism for driving a heald frame of a weaving machine |
| CN109881326A (en) * | 2019-04-25 | 2019-06-14 | 山东日发纺织机械有限公司 | A kind of loom electronic shedding device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3375256B2 (en) * | 1995-10-18 | 2003-02-10 | 津田駒工業株式会社 | Aperture control method and aperture control device |
| JP3840756B2 (en) * | 1997-08-08 | 2006-11-01 | 株式会社豊田自動織機 | Control device for independent drive opening device of loom |
| JP3994535B2 (en) * | 1998-08-17 | 2007-10-24 | 株式会社豊田自動織機 | Opening device in loom |
| JP2000080533A (en) * | 1998-09-02 | 2000-03-21 | Yamada Dobby Japan:Kk | Opening device of loom |
| EP1065306B1 (en) * | 1999-04-15 | 2004-11-10 | Kabushiki Kaisha Toyota Jidoshokki | Shedding control method and apparatus in a weaving machine |
| JP3837700B2 (en) * | 2001-10-03 | 2006-10-25 | 津田駒工業株式会社 | Opening amount adjusting device for opening device |
-
2003
- 2003-06-13 JP JP2003169033A patent/JP4008384B2/en not_active Expired - Fee Related
-
2004
- 2004-04-26 CN CNB2004100341534A patent/CN100365181C/en not_active Expired - Fee Related
- 2004-05-12 EP EP20040011310 patent/EP1486597B1/en not_active Expired - Lifetime
- 2004-05-12 DE DE200460013882 patent/DE602004013882D1/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864633A (en) * | 2009-04-14 | 2010-10-20 | 株式会社丰田自动织机 | Open device in weaving machine |
| CN101864633B (en) * | 2009-04-14 | 2012-07-04 | 株式会社丰田自动织机 | Open device in weaving machine |
| CN102162160A (en) * | 2010-02-12 | 2011-08-24 | 施托布利法韦日公司 | Method for controlling electrical actuators of a shedding device |
| CN102162160B (en) * | 2010-02-12 | 2014-10-22 | 施托布利法韦日公司 | Method for controlling electrical actuators of a shedding device |
| CN104032438A (en) * | 2014-06-18 | 2014-09-10 | 吴江万工机电设备有限公司 | Design method of six-rod shedding mechanism with long pause angle at lowest position of shed |
| CN104032438B (en) * | 2014-06-18 | 2016-05-04 | 吴江万工机电设备有限公司 | Shed open extreme lower position has the method for designing of six bar shedding mechanisms of long pause angle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4008384B2 (en) | 2007-11-14 |
| EP1486597A3 (en) | 2005-05-25 |
| DE602004013882D1 (en) | 2008-07-03 |
| JP2005002520A (en) | 2005-01-06 |
| EP1486597B1 (en) | 2008-05-21 |
| EP1486597A2 (en) | 2004-12-15 |
| CN100365181C (en) | 2008-01-30 |
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