CN108866761B - The Weft search unit of air-jet loom - Google Patents
The Weft search unit of air-jet loom Download PDFInfo
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- CN108866761B CN108866761B CN201810442110.1A CN201810442110A CN108866761B CN 108866761 B CN108866761 B CN 108866761B CN 201810442110 A CN201810442110 A CN 201810442110A CN 108866761 B CN108866761 B CN 108866761B
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- weft yarn
- light
- weft
- reed
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3066—Control or handling of the weft at or after arrival
- D03D47/3073—Detection means therefor
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/18—Automatic stop motions
- D03D51/34—Weft stop motions
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
The present invention provides a kind of Weft search unit of air-jet loom, and the Weft search unit of air-jet loom has main burner, auxiliary jet, the reed with multiple dents, reflective photoelectric sensor and discrimination section.Reed inner gateway is divided by the guide recess of multiple dents.By spraying air from main burner and auxiliary jet, wefting insertion is carried out to weft yarn via reed inner gateway.Reflective photoelectric sensor is configured at the position that can detect weft yarn, has light-projecting portion and acceptance part.Discrimination section distinguishes position on depth direction of the weft yarn in reed inner gateway and constitutes according to projecting from light-projecting portion and encountering weft yarn by the light quantity grade of the reflected light of acceptance part light after reflecting.
Description
Technical field
The present invention relates to the Weft search unit of air-jet loom, to and spraying air from main burner and auxiliary jet by
It is detected via the weft yarn of reed inner gateway wefting insertion relative to the location of reed inner gateway.
Background technique
In air-jet loom, by spraying air from main burner and auxiliary jet, weft yarn is made to fly away on reed inner gateway.Such as
In the device documented by Japanese Unexamined Patent Application Publication 2001-504902 bulletin, the multiple photosensitive elements being made of photoelectric sensor are arranged
In the upper bound region of reed inner gateway.Each photosensitive element extends along reed inner gateway.Multiple photosensitive elements reed inner gateway into
It is set side by side on deep direction.Each photosensitive element being capable of the light that is generated by light source of light.Moreover, the latitude to fly away in reed inner gateway
Yarn shield portions light.The faint light of the photosensitive element light covered in multiple photosensitive elements by weft yarn as a result,.Therefore, energy
Enough pass through detects in multiple photosensitive elements by which (a little) photosensitive element light to faint light, leads to detect weft yarn in reed
The position on depth direction in road.
However, multiple photosensitive elements are needed, so increased costs in the device that above-mentioned bulletin is recorded.In addition, with beating
Reed is towards the front-rear direction reciprocally swinging of air-jet loom when latitude, and reed generates vibration, to the application impact of multiple photosensitive elements.Therefore,
The durability of photosensitive element can be problematic.
Summary of the invention
The object of the present invention is to provide can cost squeeze and can improve durability air-jet loom Weft search unit.
It realizes that the Weft search unit of the air-jet loom of above-mentioned purpose is configured to, has the main burner of wefting insertion, wefting insertion is used
Auxiliary jet and reed with the multiple dents being arranged along wefting insertion direction.Above-mentioned dent is respectively provided with guide recess, by multiple
Above-mentioned guide recess divides reed inner gateway.By spraying air from above-mentioned main burner and above-mentioned auxiliary jet, lead to via in above-mentioned reed
Road carries out wefting insertion to weft yarn.The Weft search unit of air-jet loom has reflective photoelectric sensor and discrimination section.Reflecting light
Electric transducer is configured at the position that can detect above-mentioned weft yarn, has light-projecting portion and acceptance part.Discrimination section is according to from above-mentioned light-projecting portion
By the light quantity grade of the reflected light of above-mentioned acceptance part light after projecting and reaching above-mentioned weft yarn and reflected, distinguish that above-mentioned weft yarn exists
The position on depth direction in above-mentioned reed inner gateway.
Detailed description of the invention
Fig. 1 is the schematic diagram for showing the Weft inserting device of air-jet loom of an embodiment.
Fig. 2 is the brief perspective views for the Weft inserting device that part shows air-jet loom.
Fig. 3 is the schematic diagram for indicating the positional relationship between dent and the second woven pieces inner sensor.
Fig. 4 is the schematic diagram for indicating the light quantity distribution of the light projected from the second woven pieces inner sensor.
Fig. 5 A is the schematic diagram for showing the state that weft yarn normally flies away in reed inner gateway.
Fig. 5 B is the chart for indicating the relationship between sensor voltage and bending angle.
Fig. 6 A is the schematic diagram for showing the state that weft yarn flies out from reed inner gateway.
Fig. 6 B is the chart for indicating the relationship between sensor voltage and bending angle.
Fig. 7 A is the schematic diagram for showing the state that weft yarn flies out from reed inner gateway.
Fig. 7 B is the chart for indicating the relationship between sensor voltage and bending angle.
Specific embodiment
Hereinafter, illustrating the embodiment for embodying the Weft search unit of air-jet loom in conjunction with FIG. 1 to FIG. 7 B.This
Outside, in the following description, by weft yarn into Warp opening wefting insertion come convey weft yarn wefting insertion direction on, will be with wefting insertion direction phase
Anti- side is defined as upstream side, and side corresponding with wefting insertion direction is defined as downstream side.
As shown in Figure 1, Weft inserting device 10 have Weft insertion nozzle 11, yarn feeder 12, weft yarn survey long accumulating device 13, reed 14,
The auxiliary jet 15 and control device 16 of multiple wefting insertion.Control device 16 has the display with display function and input function
Device 16a.
Yarn feeder 12 is disposed in the upstream of Weft insertion nozzle 11.The weft yarn Y of yarn feeder 12 surveys long accumulating device 13 by weft yarn
Winding arm (not shown) rotation and be drawn out, stockpile the state of cylinder 17 to be wound in and be accumulated in and stockpile cylinder 17.
It is provided with weft yarn locking pin 18 in the long accumulating device 13 of weft yarn survey and long accumulating device 13 is surveyed from weft yarn to weft yarn Y
The air ring sensor (Balloon Sensor) 19 that is detected of unwinding.The weft yarn locking gentle coil sensor 19 of pin 18 is disposed in
It stockpiles around cylinder 17.Weft yarn locking pin 18 is electrically connected with control device 16.Weft yarn engages pin 18 to be pre-set in control dress
The loom rotation angle in 16 is set, the weft yarn Y for stockpiling cylinder 17 will be accumulated in and unwound.Implement to unwind weft yarn using weft yarn locking pin 18
It is wefting insertion start time at the time of Y.
Air ring sensor 19 is electrically connected with control device 16.The detection of air ring sensor 19 is during wefting insertion from stockpiling cylinder 17
The weft yarn Y of unwinding sends weft unwinding signal to control device 16.Control device 16 is receiving preset number (In
In present embodiment be 4 times) weft unwinding signal when, make weft yarn locking pin 18 act.Weft yarn locking pin 18 will be from stockpiling cylinder
The weft yarn Y of 17 unwindings is engaged and is terminated wefting insertion.
In addition, according in order to will be accumulated in the weft yarn Y of the comparable length of woven pieces TL stockpile cylinder 17 required for winding time
Number, setting weft yarn locking pin 18 engage the action moment of weft yarn Y.In the present embodiment, control device 16 is set to, and is being connect
When receiving the weft unwinding signal of 4 air ring sensors 19, the action signal for engaging weft yarn Y is sent to weft yarn locking pin 18.
Therefore, in the Weft inserting device of present embodiment 10, the comparable weft yarn Y of length is stockpiled to the weft yarn with the 4 circle amounts for stockpiling cylinder 17
Carry out wefting insertion.
The weft examining signal of air ring sensor 19 is weft yarn Y from the unwinding signal for stockpiling cylinder 17 and unwinding.In control device
In 16, according to the loom rotary angle signal obtained from encoder 20, in the form of the weft unwinding moment, air ring sensor is identified
19 weft examining signal.
Weft insertion nozzle 11 have will stockpile cylinder 17 weft yarn Y pull out tandem nozzle 21 and will be in the reed of weft yarn Y-direction reed 14
The main burner 22 of the wefting insertion of access 14a wefting insertion.In air-jet loom, by spraying air from main burner 22 and auxiliary jet 15,
Wefting insertion is carried out to weft yarn Y via reed inner gateway 14a.It is provided with before wefting insertion terminates in the upstream of tandem nozzle 21 to the latitude to fly away
The brake 23 that yarn Y is braked.
Main burner 22 is connect via piping 22a with main valve 22v.Main valve 22v connects via piping 22b with primary air tank 26
It connects.Tandem nozzle 21 is connect via piping 21a with tandem valve 21v.Tandem valve 21v is shared via piping 21b with same main valve 22v
Primary air tank 26 connect.
Primary air tank 26 and is set to via principal pressure meter 27, master selector 28, initial pressure meter 29 and filter 30
The shared air compressor 31 of textile mills connects.Storage supplies from air compressor 31 and by main regulation in primary air tank 26
Device 28 is adjusted to the compressed air of setting pressure.Also, the pressure of the compressed air supplied to primary air tank 26 is led always
Pressure gauge 27 detects.
As an example, it is 6 groups that multiple auxiliary jets 15, which divide, and each group is made of 4 auxiliary jets 15 respectively.Corresponding to each group, match
Equipped with 6 secondary valves 32, the auxiliary jet 15 of each group is connected via piping 33 with corresponding secondary valve 32.Each pair valve 32 and shared pair
Air tank 34 connects.
Secondary air tank 34 is connect via secondary stress meter 35 with secondary controller 36.In addition, secondary controller 36 passes through piping 36a,
With the piping 28a connection for connecting principal pressure meter 27 and master selector 28.Storage is supplied from air compressor 31 in secondary air tank 34
Give and be adjusted to by secondary controller 36 compressed air of setting pressure.In addition, the pressure of the compressed air supplied to secondary air tank 34
Power is detected by secondary stress meter 35 always.
Main valve 22v, tandem valve 21v, secondary valve 32, initial pressure meter 29, principal pressure meter 27, secondary stress meter 35 and brake
23, it is electrically connected with control device 16.Be preset in control device 16 for make main valve 22v, tandem valve 21v, secondary valve 32 with
And during the action moment and movement of the movement of brake 23.In addition, control device 16 receives initial pressure meter 29, principal pressure meter 27
And the detection signal of secondary stress meter 35.
At the time of the wefting insertion start time acted than weft yarn locking pin 18 is early, from control device 16 to main valve 22v and string
Column valve 21v output action command signal.Compressed air is sprayed from main burner 22 and tandem nozzle 21 as a result,.It is engaged than weft yarn
Pin 18 acts and will stockpile the period of morning weft yarn top arrival time of the weft yarn Y locking of cylinder 17, from control device 16 to braking
23 output action command signal of device.Brake 23 brakes the weft yarn Y to fly away at a high speed, makes the speed reduction of flying away of weft yarn Y, mitigates
The impact that weft yarn Y is subject in weft yarn top arrival time.
Various fabric conditions and weaving condition are registered and are stored in control device 16.Weaving condition is for example including weft yarn Y
The weft yarns such as material, number of used yarn type, weft count, yarn used in warp thread the warp thread such as material, number
The parameters such as type, warp count, woven pieces, weave.Revolving speed, primary air tank 26 and pair of the weaving condition for example including loom are empty
The pressure of the compressed air of gas tank 34, the aperture of main valve 22v and tandem valve 21v, wefting insertion start time, target weft yarn top reach
The parameters such as moment.
As shown in Fig. 2, main burner 22, auxiliary jet 15 and reed 14 are disposed on slay 24, in the front and back of air-jet loom
Upward reciprocally swinging.Multiple auxiliary jets 15 are fixed on slay 24 via rest pad 25 respectively.With the swing of slay 24, pair spray
Mouth 15 can be passed in and out out of opening between the column of warp thread T relative to warp thread T.
In addition, tandem nozzle 21, brake 23, weft yarn survey long accumulating device 13 and yarn feeder 12 is fixed on air-jet loom
Frame (not shown) or on the bracket (not shown) of ground installation (not shown).
Reed 14 is arranged on wefting insertion direction by multiple dent 14c and is constituted.It is recessed that multiple dent 14c are respectively provided with guidance
Portion 14b.Reed inner gateway 14a is divided by the guide recess 14b of multiple dent 14c.
As depicted in figs. 1 and 2, tail sensor 40 is equipped at the downstream in reed inner gateway 14a.Tail sensor 40
It is configured at outside the range with the woven pieces TL of 22 opposite side of main burner in reed inner gateway 14a.
With in the state that weft yarn Y has normally been done wefting insertion, the weft yarn of tail sensor 40 and the 4 circle amounts for stockpiling cylinder 17
The apical position for stockpiling the comparable weft yarn Y of length becomes the mode for detecting position of tail sensor 40, is configured at woven pieces TL's
Outside range.Tail sensor 40 is electrically connected with control device 16.In addition, the weft examining signal of tail sensor 40 is weft yarn Y
Arriving signal.In control device 16, according to the loom rotary angle signal obtained from encoder 20, to form wefting insertion
The top of weft yarn Y reaches the weft yarn top arrival time form of the detection position of tail sensor 40, identifies that tail portion senses
The weft examining signal of device 40.
First is equipped on part in the range of the ratio 40 woven pieces TL by the upstream of tail sensor of reed inner gateway 14a
Woven pieces inner sensor 41.Therefore, the first woven pieces inner sensor 41 is configured in the range of the woven pieces TL of reed inner gateway 14a, configuration
The center than woven pieces TL in reed inner gateway 14a lean on at 22 opposite side of main burner.First woven pieces inner sensor 41 with
Weft yarn Y has normally been done the top for stockpiling the comparable weft yarn Y of length in the state of wefting insertion with the weft yarn for the 3 circle amounts for stockpiling cylinder 17
Position becomes the mode of the detection position of the first woven pieces inner sensor 41, is configured in the range of woven pieces TL.It is passed in first woven pieces
Sensor 41 is electrically connected with control device 16.The loom rotary angle signal that basis is obtained from encoder 20 in control device 16,
It is reached among weft yarn to be formed the inspection positions that the top of the weft yarn Y of wefting insertion reaches the first woven pieces inner sensor 41
The form at moment identifies the weft examining signal of the first woven pieces inner sensor 41.
Part in the range of ratio the first woven pieces 41 woven pieces TL by the upstream of inner sensor of reed inner gateway 14a is equipped
Second woven pieces inner sensor 42.The second woven pieces inner sensor 42 is configured in the range of the woven pieces TL of reed inner gateway 14a as a result,
It is configured between the center of woven pieces TL and main burner 22.Second woven pieces inner sensor 42 is electrically connected with control device 16.
As shown in Figures 2 and 3, tail sensor 40, the first woven pieces inner sensor 41 and the second woven pieces inner sensor 42
It is fixed on slay 24 in a manner of it can adjust position via rest pad 43.In first woven pieces inner sensor 41 and the second woven pieces
Sensor 42 can be fixed on slay at the position for the range detection weft yarn Y not influenced by the jet pressure of main burner 22
24。
As shown in figure 3, the first woven pieces inner sensor 41 and the second woven pieces inner sensor 42 are opposed with reed inner gateway 14a, and
As shown in the double dot dash line in Fig. 3, the first woven pieces inner sensor 41 and the second woven pieces inner sensor 42 in beating in fabric W
It is mobile without being fixed on slay 24 with the W-shaped mode at interference of fabric with the lower section of fell W1.
As shown in Fig. 4 and Fig. 5 A, the second woven pieces inner sensor 42 is that have that light-projecting portion 42a's and acceptance part 42b is reflective
Photoelectric sensor.In addition, identical as the second woven pieces inner sensor 42, tail sensor 40 and the first woven pieces inner sensor 41 also have
There are light-projecting portion and acceptance part.
The main part 42c of second woven pieces inner sensor 42 is that there are two the tubulars of reception hole 42d for tool.Light-projecting portion 42a and by
Light portion 42b is the optical fiber for being accommodated in each reception hole 42d respectively.
As shown in Figure 5A, top end part 421a, 421b of light-projecting portion 42a and acceptance part 42b is configured at connects than guide recess 14b
The position of nearly fabric W.Light-projecting portion 42a and acceptance part 42b is set in such a way that two top end part 421a, 421b are arranged in the up-down direction
It is placed in main part 42c.The top end part 421a of light-projecting portion 42a is located at the upper position the top end part 421b than acceptance part 42b.
In air-jet loom driving, light is projected from the top end part 421a of light-projecting portion 42a to reed inner gateway 14a.From light-projecting portion
The light that the top end part 421a of 42a has been projected reflection when encountering in the weft yarn Y to fly away on reed inner gateway 14a.In turn, encounter weft yarn
Y and a part of reflected light for reflecting by acceptance part 42b top end part 421b light.
As shown in Figure 1, being inputted from the reflected light that the top end part 421b of acceptance part 42b is subject to amplifier 46.Amplifier 46
Light is carried out to the reflected light that input is come in using photodiode and is converted into electric signal, in the electric signal that will convert into
After amplification, exported to bandpass filter 47.Bandpass filter 47 allow the frequency in the output signal from amplifier 46 2~
The output signal of 5kHz range passes through.
Then, the output signal of bandpass filter 47 is inputted via A/D converter 48 to control device 16.Control device 16
Extension at the time of being inferred to be reduced to preset threshold value from the output signal value of bandpass filter 47, as weft yarn Y
At the time of opening up straight.Specifically, control device 16 is filtered via the reception of A/D converter 48 by band logical with the sampling frequency of tens kHz
The processed analog signal of wave device 47.Control device 16 carries out absolute value calculating to the signal that receives, is averaged for wefting insertion 100 times
Value calculates, rolling average calculates, extends the processing for calculating and inferring at the time of opening up straight.Control device 16 is as inferring
Extend the apparent diameter of the relational expression or the threshold value and weft yarn Y between the apparent diameter of the threshold value and weft yarn Y at the time of opening up straight
Chart data mode, storage for infers extend open up it is straight at the time of threshold value.The value of threshold value average output voltage is set.
The amount of the light projected from the top end part 421a of light-projecting portion 42a is distributed as shown in Figure 4.From light-projecting portion 42a and light
When front the second woven pieces inner sensor 42 of observation of top end part 421a, 421b of portion 42b, light quantity is formed with far from the second woven pieces
The central portion of inner sensor 42 and the distribution of reduced concentric circles.Specifically, the highest highest zone Z1 of light quantity, is located at most
Close to the position of the central portion of the second woven pieces inner sensor 42.Light amount ratio highest zone Z1 low high region Z2 is located at than highest
Region Z1 leans on the position of radial outside.Also, the high region Z2 of light amount ratio low middle region Z3 is located at more outside by diameter than high region Z2
The position of side.Region Z3 low low area Z4 is located at the position that radial outside is leaned on than middle region Z3 in light amount ratio.
In addition, as shown in Figure 5A, from side when the second woven pieces inner sensor 42, in the top end part from light-projecting portion 42a
In the distribution for the light quantity that 421a is projected, the major part being predominantly located in than high region Z2 of highest zone Z1 and middle region Z3's is big
Partially away from the position of the bottom surface 141b of guide recess 14b.High region Z2 covering highest zone Z1 is whole, and high region Z2
It is predominantly located in the position of the bottom surface 141b than highest zone Z1 close control recess portion 14b.It is whole that middle region Z3 covers high region Z2
Body, and middle region Z3 be predominantly located in than high region Z2 closer to guide recess 14b bottom surface 141b position.Low area
Region Z3's is substantially whole in Z4 covering.The part of low area Z4 and the bottom surface 141b of guide recess 14b are integrally continuous.Based on quilt
The signal strength of the electric signal of the reflected light of acceptance part 42b light, i.e. the light quantity grade of reflected light pass directly proportional to light quantity distribution
System.
Next, illustrating the effect of present embodiment.
Such as shown in Figure 5A, it is assumed that the top of weft yarn Y from the light-projecting portion 42a of the second woven pieces inner sensor 42 by penetrating
When the injection region of light out, pass through the low area Z4 of light quantity distribution.In detail, the top of weft yarn Y is in reed inner gateway 14a
Pass through from the low area Z4 between middle region Z3 and the bottom surface 141b of guide recess 14b.
(signal is defeated with sensor voltage for bending angle when Fig. 5 B shows the operating of the air-jet loom in the state of Fig. 5 A
Voltage out) between relationship.Sensor voltage is based on by the reflected light of the acceptance part 42b light of the second woven pieces inner sensor 42
Electric signal signal strength, i.e. the light quantity grade of reflected light.In addition, in the present embodiment, bending angle is 80 °~
270 ° of this ranges are during wefting insertion allows, and in bending angle range in addition to this, the second woven pieces inner sensor 42 is detected
The movement of warp thread T.
When bending angle is 105 °, the top of weft yarn Y from the light-projecting portion 42a of the second woven pieces inner sensor 42 by projecting
The injection region of light.As shown in Figure 5 B, when bending angle is 105 °, sensor voltage does not rise sharp.In bending angle
When for 105 ° of later angles, elapse to sensor voltage constant.
In contrast, as shown in Figure 6A, it is assumed that the top of weft yarn Y is passing through the light-projecting portion from the second woven pieces inner sensor 42
When the injection region for the light that 42a is projected, pass through the high region Z2 of light quantity distribution.Jet when Fig. 6 B shows the state of Fig. 6 A is knitted
The bending angle when operating of machine and the relationship between the sensor voltage of the second woven pieces inner sensor 42.
As shown in Figure 6B, pass through the light that projects from the light-projecting portion 42a of the second woven pieces inner sensor 42 on the top of weft yarn Y
When projecting region, i.e., when bending angle is 105 °, sensor voltage sharply rises to 2.6V or so.Then, under sensor voltage
2.0V or so is dropped to, is then elapsed to constant.
As shown in Figure 7 A, it is assumed that the top of weft yarn Y is by projecting from the light-projecting portion 42a of the second woven pieces inner sensor 42
When the injection region of light, pass through the low area Z4 of light quantity distribution.In detail, the top of weft yarn Y from across middle region Z3 with draw
The low area Z4 for leading the bottom surface 141b opposite side of recess portion 14b passes through.The air-jet loom in the state of Fig. 7 A is shown in Fig. 7 B
Operating when bending angle and the second woven pieces inner sensor 42 sensor voltage between relationship.In this case, weft yarn Y
In the part for following top, when flying away in reed inner gateway 14a, pass through highest zone Z1, high region Z2 and middle region Z3
In some region of possibility it is very high.
As shown in Figure 7 B, pass through the light that projects from the light-projecting portion 42a of the second woven pieces inner sensor 42 on the top of weft yarn Y
When projecting region, i.e., when bending angle is 105 °, sensor voltage does not rise sharp.However, later, in weft yarn Y
The part on top is followed by passing under some region of bending angle in highest zone Z1, high region Z2 and middle region Z3
Sensor voltage steeply rises.Then, sensor voltage drops to 2.0V or so, elapses to constant.
The degree that sensor voltage steeply rises is directly proportional to light quantity distribution.Therefore, the area for the light quantity distribution that weft yarn Y passes through
The domain high region of light quantity, the degree that sensor voltage steeply rises is bigger, and the region for the light quantity distribution that weft yarn Y passes through is
The low region of light quantity, the degree that sensor voltage steeply rises are smaller.
As shown in Figure 5 B, wefting insertion allow during, there is no sensor voltage steeply rise but sensor
In the case where elapsing to voltage constant, control device 16 is characterized as being in what weft yarn Y normally flew away in reed inner gateway 14a
State.In addition, as shown in Fig. 6 B and Fig. 7 B, during wefting insertion allows, there are sensor voltages the case where steeply rising
Under, control device 16 is characterized as flying out from reed inner gateway 14a in weft yarn Y or will flying out it in weft yarn Y
Preceding abnormality.Therefore, in the present embodiment, control device 16 is electric according to the sensor of the second woven pieces inner sensor 42
Pressure distinguishes position of the weft yarn Y relative to reed inner gateway 14a on depth direction.Depth direction is in Fig. 5 A, Fig. 6 A and Fig. 7 A
Shown in arrow A direction.
The degree that control device 16 steeply rises according to sensor voltage, distinguish weft yarn Y relative to reed inner gateway 14a into
Position on deep direction.Sensor voltage is higher, i.e. the light quantity higher grade of the reflected light of acceptance part 42b light, control device
16 are characterized as the position of top end part 421a, 421b that weft yarn Y is located at closer to light-projecting portion 42a and acceptance part 42b.In contrast,
Sensor voltage is lower, i.e. the light quantity lower grade of the reflected light of acceptance part 42b light, and control device 16 is characterized as weft yarn Y
In the position further away from light-projecting portion 42a and top end part 421a, 421b of acceptance part 42b.Therefore, control device 16 is as with basis
From light-projecting portion 42a project and meet weft yarn Y and reflected after, distinguished by the light quantity grade of the reflected light of acceptance part 42b light
The discrimination section that the mode of position of the weft yarn Y relative to reed inner gateway 14a on depth direction is constituted functions.Moreover, second
Woven pieces inner sensor 42 is as distinguishing the reflecting light of position on depth direction of the weft yarn Y in reed inner gateway 14a
Electric transducer uses.
In addition, being set as, control device 16 distinguishes position of the weft yarn Y relative to reed inner gateway 14a on depth direction, and
Exception before being characterized as flying out from the reed inner gateway 14a state to fly out or in weft yarn Y in weft yarn Y
State.In this case, position on depth direction of the control device 16 according to the weft yarn Y identified in reed inner gateway 14a
It sets, at least one of the time for spraying of feedback control auxiliary jet 15 and the jet pressure of auxiliary jet 15.Specifically, as feedback
Control, control device 16 be classified into being configured in 6 groups of auxiliary jet 15 time for spraying of the auxiliary jet 15 of one group of most upstream in advance,
The jet pressure of auxiliary jet 15 is improved, to inhibit weft yarn Y to fly out from reed inner gateway 14a.
Position of the control device 16 according to the weft yarn Y identified relative to reed inner gateway 14a on depth direction, only feeds back
The time for spraying of control auxiliary jet 15 or the only jet pressure of feedback control auxiliary jet 15.Moreover, there is also 16 bases of control device
The weft yarn Y identified carrys out the time for spraying of feedback control auxiliary jet 15 relative to position of the reed inner gateway 14a on depth direction
The case where with both jet pressures.Therefore, control device 16 is also used as according to weft yarn Y relative to reed inner gateway 14a in depth side
Upward position is come at least one of the time for spraying of feedback control auxiliary jet 15 and the jet pressure of auxiliary jet 15 and is constituted
Feedback control section functions.
Following effect can be obtained in above embodiment.
(1) control device 16 according to after projecting from light-projecting portion 42a and meet weft yarn Y and reflected, by acceptance part 42b light
Reflected light light quantity grade, distinguish position of the weft yarn Y relative to reed inner gateway 14a on depth direction.Acceptance part as a result,
The light quantity higher grade of the reflected light of 42b light, and control device 16 is characterized as weft yarn Y and is located at closer to light-projecting portion 42a and light
The position of top end part 421a, 421b of portion 42b.The light quantity lower grade of the received reflected light of acceptance part 42b, and control device 16 is distinguished
Not Wei weft yarn Y be located at further away from light-projecting portion 42a and acceptance part 42b top end part 421a, 421b position.Therefore, control device
16 can distinguish position of the weft yarn Y relative to reed inner gateway 14a on depth direction.
It therefore, is not as prior art, using multiple photoelectric sensors, but to be used only in second woven pieces and pass
Sensor 42, it will be able to distinguish position on depth direction of the weft yarn Y in reed inner gateway 14a.Therefore, weft yarn Y can be compressed
Position discrimination cost, and can be improved the durability of the second woven pieces inner sensor 42.
(2) second woven pieces inner sensors 42 are configured in the range of the woven pieces TL of reed inner gateway 14a.As a result, with for example will
Reflective photoelectric sensor is configured at the external discrimination of range with the woven pieces TL of 22 opposite side of main burner in reed inner gateway 14a
Weft yarn Y compared with the case where reed inner gateway 14a is in the position on depth direction, can rapid identification go out weft yarn Y relative to
Position of the reed inner gateway 14a on depth direction.
(3) second woven pieces inner sensors 42 are configured at center and the main jet of the woven pieces TL in the woven pieces TL of reed inner gateway 14a
Between mouth 22.With the center than woven pieces TL in the woven pieces TL of reed inner gateway 14a by the position phase with 22 opposite side of main burner
Than being easy to appear by wefting insertion at the position between the center and main burner 22 of the woven pieces TL in the woven pieces TL of reed inner gateway 14a
The case where flying out to the top of the weft yarn Y of reed inner gateway 14a from reed inner gateway 14a.It, can be in this way using above-mentioned set-up mode
The top for being easy to produce weft yarn Y from the position that reed inner gateway 14a flies out, distinguish weft yarn Y relative to reed inner gateway 14a into
Position on deep direction.
(4) control device 16 distinguishes position of the weft yarn Y relative to reed inner gateway 14a on depth direction, is being characterized as locating
The feelings of abnormality before will fly out in the weft yarn Y state to fly out from reed inner gateway 14a or in weft yarn Y
Under condition, position of the weft yarn Y identified according to this relative to reed inner gateway 14a on depth direction, feedback control auxiliary jet 15
Time for spraying and at least one of the jet pressure of auxiliary jet 15.Thus, it is possible to inhibit weft insertion error.
(5) second woven pieces inner sensors 42 are also functioned as sensor at the time of inferring that the extension of weft yarn Y opens up straight.
Therefore, structure according to the present embodiment, without being in addition arranged except sensor at the time of inferring that extension exhibition is straight for distinguishing
The reflective photoelectric sensor of position of the other weft yarn Y relative to reed inner gateway 14a on depth direction, can simplify this embodiment party
The structure of formula.
(6) when control device 16 is to the injection for being configured at the auxiliary jet 15 of one group of most upstream in 6 groups of auxiliary jet 15 is divided into
It carves and at least one of jet pressure progress feedback control.It is whole with 16 feedback control of control device, 6 groups of auxiliary jets 15 as a result,
Time for spraying is compared with the case where jet pressure, can be reduced specific air consumption, be can be realized energy conservation.
In addition, above embodiment can also change as follows.
Zero in embodiments, as distinguishing position of the weft yarn Y relative to reed inner gateway 14a on depth direction
Reflective photoelectric sensor, such as the first woven pieces inner sensor 41 also can be used without the use of the second woven pieces inner sensor 42.
That is, for distinguishing that the reflective photoelectric sensor of position of the weft yarn Y relative to reed inner gateway 14a on depth direction can also be made
To infer that the sensor of arrival time among weft yarn functions.
Zero in embodiments, as distinguishing weft yarn Y relative to reed inner gateway 14a in the anti-of the position of depth direction
Formula photoelectric sensor is penetrated, the second woven pieces inner sensor 42 can also not used, but use such as tail sensor 40.It is used for
Distinguish that the reflective photoelectric sensor of position of the weft yarn Y relative to reed inner gateway 14a on depth direction can also be used as deduction
The tail sensor of weft yarn top arrival time functions.
Zero in embodiments, for distinguishing the reflection of position of the weft yarn Y relative to reed inner gateway 14a on depth direction
Formula photoelectric sensor can also be configured at the center of the woven pieces TL in the range of the woven pieces TL of reed inner gateway 14a.
Zero in embodiments, can also in addition be arranged relative to the sensor extended at the time of opening up straight is inferred for distinguishing
The reflective photoelectric sensor of position of the weft yarn Y relative to reed inner gateway 14a on depth direction.
Zero in embodiments, can also be characterized as flying from reed inner gateway 14a in weft yarn Y by control device 16
In the case where state out or the abnormality before will flying out in weft yarn Y, given a warning to operator.At this
In the case of, such as warning can be both shown on display device 16a, the lamp for alerting display can also be made to light.
Zero in embodiments, and control device 16 can also be with the whole time for spraying of 6 groups of auxiliary jets of feedback control 15 and spray
Penetrate at least one of pressure.
Claims (4)
1. a kind of Weft search unit of air-jet loom, has:
The main burner of wefting insertion；
The auxiliary jet of wefting insertion；And
Reed has the multiple dents being arranged along wefting insertion direction,
Above-mentioned dent is respectively provided with guide recess, divides reed inner gateways by multiple above-mentioned guide recess, by from above-mentioned main burner
Air is sprayed with above-mentioned auxiliary jet, wefting insertion is carried out to weft yarn via above-mentioned reed inner gateway,
The Weft search unit of above-mentioned air-jet loom has: reflective photoelectric sensor, and above-mentioned weft yarn can be detected by being configured at
Position has light-projecting portion and acceptance part, which is characterized in that
The Weft search unit of above-mentioned air-jet loom has: discrimination section is configured to, and is projected and is touched according to from above-mentioned light-projecting portion
By the light quantity grade of the reflected light of above-mentioned acceptance part light after reflecting to above-mentioned weft yarn, distinguish that above-mentioned weft yarn leads in above-mentioned reed
The position on depth direction in road.
2. the Weft search unit of air-jet loom according to claim 1, wherein
Above-mentioned reflective photoelectric sensor is configured in the range of the woven pieces of above-mentioned reed inner gateway.
3. the Weft search unit of air-jet loom according to claim 2, wherein
Above-mentioned reflective photoelectric sensor is configured at the central between above-mentioned main burner of above-mentioned woven pieces.
4. the Weft search unit of air-jet loom described in any one of claim 1 to 3, wherein
Has feedback control section, which is configured to, opposite according to the above-mentioned weft yarn identified by above-mentioned discrimination section
In position of the above-mentioned reed inner gateway on depth direction, the spray of the time for spraying and above-mentioned auxiliary jet of the above-mentioned auxiliary jet of feedback control
It penetrates at least one of pressure and constitutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-096388 | 2017-05-15 | ||
| JP2017096388A JP6921621B2 (en) | 2017-05-15 | 2017-05-15 | Air jet loom weft detector |
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| CN108866761A CN108866761A (en) | 2018-11-23 |
| CN108866761B true CN108866761B (en) | 2019-12-03 |
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| EP (1) | EP3404132B1 (en) |
| JP (1) | JP6921621B2 (en) |
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| JP7099329B2 (en) * | 2019-01-07 | 2022-07-12 | 株式会社豊田自動織機 | Warp and weft detector for air jet looms |
| JP7077968B2 (en) * | 2019-01-14 | 2022-05-31 | 株式会社豊田自動織機 | Weft processing equipment for air jet looms |
| JP7420042B2 (en) * | 2020-10-09 | 2024-01-23 | 株式会社豊田自動織機 | Weft detection device |
| JP7415904B2 (en) * | 2020-12-08 | 2024-01-17 | 株式会社豊田自動織機 | Air jet loom weft insertion control device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316859A (en) * | 2014-08-04 | 2016-02-10 | 株式会社丰田自动织机 | Weft detection apparatus in jet loom |
| CN106012243A (en) * | 2015-03-27 | 2016-10-12 | 株式会社丰田自动织机 | Weft detection apparatus for air-jet weaving machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0571046A (en) * | 1991-06-01 | 1993-03-23 | Toyota Autom Loom Works Ltd | Weft yarn sensor in fluid jetting type loom |
| BE1010779A3 (en) * | 1996-12-02 | 1999-01-05 | Picanol N V Naamloze Vennoosch | WOOF WACHTER for a weaving machine. |
| JP5218321B2 (en) * | 2009-07-30 | 2013-06-26 | 株式会社豊田自動織機 | Weft detection device in jet loom |
| JP6281475B2 (en) * | 2014-11-24 | 2018-02-21 | 株式会社豊田自動織機 | Weft detection method in air jet loom |
| JP6367784B2 (en) * | 2015-03-27 | 2018-08-01 | 株式会社豊田自動織機 | Weft detection device for air jet loom |
-
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- 2017-05-15 JP JP2017096388A patent/JP6921621B2/en active Active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316859A (en) * | 2014-08-04 | 2016-02-10 | 株式会社丰田自动织机 | Weft detection apparatus in jet loom |
| CN106012243A (en) * | 2015-03-27 | 2016-10-12 | 株式会社丰田自动织机 | Weft detection apparatus for air-jet weaving machine |
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| Publication number | Publication date |
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| EP3404132B1 (en) | 2019-10-16 |
| JP6921621B2 (en) | 2021-08-18 |
| JP2018193628A (en) | 2018-12-06 |
| EP3404132A1 (en) | 2018-11-21 |
| CN108866761A (en) | 2018-11-23 |
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