CN1040675C - Weft insertion method and apparatus for rapier loom - Google Patents

Weft insertion method and apparatus for rapier loom Download PDF

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Publication number
CN1040675C
CN1040675C CN95106585A CN95106585A CN1040675C CN 1040675 C CN1040675 C CN 1040675C CN 95106585 A CN95106585 A CN 95106585A CN 95106585 A CN95106585 A CN 95106585A CN 1040675 C CN1040675 C CN 1040675C
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CN
China
Prior art keywords
weft
magnetic force
gripper
yarn
voltage
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Expired - Fee Related
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CN95106585A
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Chinese (zh)
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CN1119681A (en
Inventor
新原正己
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Toyota Industries Corp
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Toyoda Automatic Loom Works Ltd
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Publication of CN1119681A publication Critical patent/CN1119681A/en
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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/04—Auxiliary apparatus combined with or associated with looms for treating weft

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Abstract

The invention relates to a weft inserting apparatus for a rapier loom for weaving a fabric by inserting a weft through a shed formed by warps by reciprocatively moving feeding and receiving rapier heads through the shed. The feeding and receiving rapier heads are each constituted by a combination of a stationary gripper member and a movable gripper member made of a magnetic material. Electromagnets are disposed at both ends of a sley, respectively, while electromagnets are disposed at a mid portion of the sley. The movable gripper member of the feeding rapier head positioned in opposition to the electromagnets is displaced from a weft grip position to a weft release position by controlling the magnetic action of the electromagnets. The weft insertion can be carried out with high reliability while positively protecting the weft against injury.

Description

The Weft insertion method of Rapier looms and device
The present invention relates to a kind of Rapier looms, it introduces weft yarn the mode Woven fabric of shed open by using at least one gripper head that back and forth moves past the shed open that limits between warp thread.More particularly, the present invention relates to a kind of Weft insertion method of above-mentioned Rapier looms and implement the device of this method.
In hitherto known Rapier looms, be to use as disclosed a kind of weft insertion rapier head in the open text the 195373/1993rd (JP-A-5-195373) of the patent application of Japanese unexamined number, weft yarn is introduced the shed open (hereinafter also being called through a race) that limits between thread layer, and Woven fabric.By the way, the weft insertion rapier head is called giver (giver) in above-mentioned open text.The weft yarn of introducing race between warp by the weft insertion rapier head is transferred to a receiving rapier head (be called and be subjected to latitude arrow shaft (taker)) in above-mentioned open text.In weft insertion rapier head and the receiving rapier head each by a rest gripper member and movable gripper member in conjunction with and form.For carry out weft yarn from the weft insertion rapier head to the passing on of receiving rapier head, the latter is positioned at substantially corresponding to just in the centre position (from fabric laterally) at the center of woven fabric, is in the stand-by state that relevant gripper member is opened.Clamp the weft yarn of pine oil then by receiving rapier head.Therefore the weft yarn of finishing between weft insertion rapier head and receiving rapier head passes on.
In the disclosed Rapier looms of JP-A-5-195373, above-mentionedly to finish by a pair of bar in the opening of the gripper head that the is in fabric middle part/closed operation of looking of fabric width direction, described bar constitutes the part that is arranged on the yarn clip board loosening device under the fabric.More particularly, the yarn clip board loosening device is by a driven by servomotor, and servomotor is controlled and with the motor coordination of two gripper heads, each gripper head also is suitable for by a driven by servomotor.In order to realize passing on from the weft yarn of weft insertion rapier head to receiving rapier head, avoid the damage to weft yarn that may occur simultaneously, adopt a kind of drive system that is used for controllably driving yarn clip board loosening device and gripper head.
But the yarn clip board loosening device bar that is used for the open and close gripper head enters through a race space under low warp thread by pushing each warp thread open through arranging.The each wefting insertion of above-mentioned motion of yarn clip board loosening device bar is throwed a spear or the wefting insertion circulation is carried out once.Therefore warp thread obviously sustains damage easily, and this is that this is the problem place of common Rapier looms because yarn clip board loosening device bar passes in and out the cause of race back and forth by thread layer.
According to above-mentioned prior art state, an object of the present invention is to provide a kind of Weft insertion method of Rapier looms, this method is used a gripper head can very reliably and don't damage warp thread ground weft yarn is introduced race between warp.
Another object of the present invention provides a kind of weft inserting apparatus of implementing said method.
According to the Weft insertion method that the invention provides a kind of Rapier looms, in described Rapier looms, gripper head back and forth passes the race that is made of warp thread and moves, make weft yarn pass described race and Woven fabric, each gripper head is by static and movable gripper member be combined into, described Weft insertion method is characterised in that: the described movable gripper member in response to magnetic force bears the magnetic force that is produced by the magnetic force bringing device, so that occupy a weft grip position or a weft release position selectively; The conversion between first state and second state of described magnetic force bringing device, it applies magnetic force to described movable gripper member at described first state, it does not apply magnetic force to described movable gripper member at described second state, wherein, when applying described magnetic force, at first apply an overexcitation voltage, and then apply a rated voltage to described magnetic force bringing device; Described movable gripper member by make described magnetic force bringing device between described first state and described second state conversion and conversion between weft grip position and weft release position; Weft yarn is converted into described weft grip position and is clamped by movable gripper member from described weft release position by making movable gripper member, and weft yarn is converted into described weft release position and by pine oil by making movable gripper member from described weft grip position.
In according to Weft insertion method of the present invention, when when movable gripper member applies magnetic force, at first apply overexcitation voltage, with after-applied rated voltage to calutron.Owing to applied overexcitation voltage, movable gripper member carries out rapidly from the evolution of weft grip position with weft release position, thereby can improve the operating rate of loom, and this is favourable.
The present invention also relates to a kind of Rapier looms that is used for Woven fabric, the gripper head device of described loom back and forth passes the race that is formed by warp thread, make weft yarn insert described race, so that Woven fabric, described gripper head is by static and movable gripper member be combined into, described movable gripper member when weft yarn clamped and during pine oil by drive unit conversion between weft grip position and weft release position, it is characterized in that: described movable gripper member to small part is made of magnetic force response part; A plurality of magnetic force bringing devices as described drive unit in series are provided with along the wefting insertion path of described gripper head device mutually; And described movable gripper member is to be undertaken by the conversion of described magnetic force bringing device between first state and second state in the conversion between described weft grip position and the weft release position, in described first state, the magneticaction of described magnetic force bringing device is on described magnetic force response part, in described second state, the magnetic force of described magnetic force bringing device does not act on the described magnetic force response part.
In addition, a kind of Rapier looms comprises that a weft insertion rapier head that is made of static wefting insertion yarn gripper and movable wefting insertion yarn gripper and one are by the static receiving rapier head that constituted by latitude yarn gripper and active receiving latitude yarn gripper, wherein, weft insertion rapier head and receiving rapier head both insert the race that is formed by warp thread, so that make the weft yarn insertion and pass through race by transferring to receiving rapier head by the weft yarn that the weft insertion rapier head-clamp is lived, for this Rapier looms, provide a kind of weft inserting apparatus according to another aspect of the present invention, it is characterized in that this weft inserting apparatus comprises first magnetic force response part of at least a portion of formation activity wefting insertion yarn gripper; Constitute second magnetic force response part of at least a portion of active receiving latitude yarn gripper; Be arranged near a wefting insertion magnetic force bringing device of living on the weft insertion rapier wefting insertion path wefting insertion dead point; What be arranged on wefting insertion dead point one side on the receiving rapier head wefting insertion path is subjected to latitude magnetic force bringing device; Be used to make first converting means of wefting insertion magnetic force bringing device conversion between first state and second state, wherein, under first state, the magneticaction of wefting insertion magnetic force bringing device is on the magnetic force response part of movable wefting insertion yarn gripper, under second state, the magnetic force of wefting insertion magnetic force bringing device does not act on the magnetic force response part of movable wefting insertion yarn gripper, thereby makes the conversion between weft grip position and weft release position of movable wefting insertion yarn gripper; And be used to make second converting means that is subjected to the conversion between first state and second state of latitude magnetic force bringing device, wherein, under first state, the magneticaction that is subjected to latitude magnetic force bringing device is on the magnetic force response part of active receiving latitude yarn gripper, under second state, do not acted on the magnetic force response part of active receiving latitude yarn gripper by the magnetic force of latitude magnetic force bringing device, thereby make the conversion between weft grip position and weft release position of active receiving latitude yarn gripper.
In a preferred embodiment according to weft inserting apparatus of the present invention, a plurality of wefting insertion magnetic force are made state transformation and are realized between first state and second state, under first state, the magneticaction of magnetic force bringing device is on the magnetic force response part of movable gripper member, under second state, the magnetic force of magnetic force bringing device does not act on the magnetic force response part.
In addition, a kind of Rapier looms comprises that a weft insertion rapier head that is made of static wefting insertion yarn gripper and movable wefting insertion yarn gripper and one are by the static receiving rapier head that constituted by latitude yarn gripper and active receiving latitude yarn gripper, wherein, weft insertion rapier head and receiving rapier head both insert the race that is formed by warp thread, so that make the weft yarn insertion and pass through race by transferring to receiving rapier head by the weft yarn that the weft insertion rapier head-clamp is lived, for this Rapier looms, provide a kind of weft inserting apparatus according to another aspect of the present invention, it is characterized in that this weft inserting apparatus comprises first magnetic force response part of at least a portion of formation activity wefting insertion yarn gripper; Constitute second magnetic force response part of at least a portion of active receiving latitude yarn gripper; Be arranged on and be positioned near a wefting insertion magnetic force bringing device of wefting insertion dead point on the weft insertion rapier wefting insertion path; What be arranged on wefting insertion dead point one side on the receiving rapier head wefting insertion path is subjected to latitude magnetic force bringing device; Be used to make first converting means of wefting insertion magnetic force bringing device conversion between first state and second state, wherein, under first state, the magneticaction of wefting insertion magnetic force bringing device is on the magnetic force response part of movable wefting insertion yarn gripper, under second state, the magnetic force of wefting insertion magnetic force bringing device does not act on the magnetic force response part of movable wefting insertion yarn gripper, thereby makes the conversion between weft grip position and weft release position of movable wefting insertion yarn gripper; And be used to make second converting means that is subjected to the conversion between first state and second state of latitude magnetic force bringing device, wherein, under first state, the magneticaction that is subjected to latitude magnetic force bringing device is on the magnetic force response part of active receiving latitude yarn gripper, under second state, do not acted on the magnetic force response part of active receiving latitude yarn gripper by the magnetic force of latitude magnetic force bringing device, thereby make the conversion between weft grip position and weft release position of active receiving latitude yarn gripper.
In a preferred embodiment according to weft inserting apparatus of the present invention, the setting of can connecting mutually along the wefting insertion path of weft insertion rapier head of a plurality of wefting insertion magnetic force bringing devices.
In implementing another preferred embodiment of the present invention, a plurality ofly be subjected to the setting of can connecting mutually along the wefting insertion path of receiving rapier head of latitude magnetic force bringing device.
By above-mentioned layout, the magneticaction that a plurality of wefting insertion magnetic force bringing devices that the weft insertion rapier head is subjected to being provided with along connecting on the wefting insertion path are in proper order applied, and the same order of receiving rapier head is subjected to along a plurality of magneticactions that are subjected to latitude magnetic force bringing device of series connection setting on the wefting insertion path.Therefore, when gripper head is mobile, can make gripper head conversion between loose weft state and folder latitude state.
In implementing another preferred embodiment of the present invention, the magnetic force bringing device can be made of at least one electromagnet, and wherein, weft inserting apparatus can also comprise that being used for controlling the voltage that applies electromagnet voltage applies control device; Be used for adjusting the voltage level regulator of the voltage level that puts on electromagnet, be used for the voltage that setting voltage puts on the timing of electromagnet and apply regularly regulator.
In the weft inserting apparatus of said structure, voltage is applied to timing on the electromagnet and applies regularly on the regulator at voltage and adjust, and voltage applies and sends voltage on control device applies regularly the data of setting on the regulator at voltage the basis and apply time-of-the-day order.On the other hand, the voltage level regulator is used to be adjusted at the voltage level that the timing of preset applies.In this case, voltage applies timing control apparatus and timing/level adjusting device can be undertaken by the form of for example microcomputer.
In implementing another kind of preferred embodiment of the present invention, the buffer substrate tablet of a soft material can fold up between magnetic force bringing device and movable gripper member, and therefore, when movable gripper member was in weft release position, weft yarn was clipped between buffer substrate tablet and the movable gripper member.
According to another aspect of the present invention, for Rapier looms provides a kind of weft inserting apparatus, thereby above-mentioned Rapier looms drew weft yarn the race Woven fabric that is formed by thread layer by the mode of at least one gripper head that is made of rest gripper member and movable gripper member being inserted race, the feature of above-mentioned weft inserting apparatus is, a piezo-electric device that is used to drive movable gripper member folds up between movable gripper member and rest gripper member, movable gripper member is made evolution between weft grip position and weft release position, this is by the conversion between first state that is subjected to the voltage effect and no-voltage effect second state on it of above-mentioned piezo-electric device is realized.
In the weft inserting apparatus of said structure, utilize the variation of piezo-electric device length when applying voltage and eliminating voltage to make movable gripper member between weft grip position and weft release position, make evolution.This mapping device and the controller cost of establishing for this purpose are low, simple in structure, can guarantee the weft inserting apparatus reliable operation simultaneously, thereby guarantee the Rapier looms reliable operation.
By the detailed description of following contrast accompanying drawing, can more be expressly understood above-mentioned purpose, feature and advantage with other of the present invention to preferred embodiment.
Fig. 1 is the weft inserting apparatus front view (part is cut open) according to the Rapier looms of the first embodiment of the present invention;
Fig. 2 is the amplification front view of weft inserting apparatus major part;
Fig. 3 is the view of similar Fig. 2, is illustrated in the major part of weft inserting apparatus when passing on state;
Timing diagram shown in Figure 4 is used for illustrating that the electromagnet that weft inserting apparatus shown in Figure 1 is adopted applies voltage condition;
Vertical sectional view shown in Figure 5 is represented with electromagnet relevant variation to be set;
Fig. 6 is the amplification front view according to the major part of the weft inserting apparatus for a rapier loom of another embodiment of the present invention;
Fig. 7 is the view that is similar to Fig. 2, and expression is according to the major part of the weft inserting apparatus for a rapier loom of another embodiment of the present invention;
Timing diagram shown in Figure 8 represent shown in Figure 5 in weft inserting apparatus used electromagnet apply voltage condition;
Timing diagram shown in Figure 9 is represented to applying voltage condition according to the used electromagnet of the weft inserting apparatus of another embodiment of the present invention;
Timing diagram shown in Figure 10 is represented to applying voltage condition according to the used electromagnet of the weft inserting apparatus of another embodiment of the present invention;
Timing diagram shown in Figure 11 is represented to applying voltage condition according to the used electromagnet of the weft inserting apparatus of another embodiment of the present invention;
Figure 12 is the view that is similar to Fig. 2, and expression is according to the major part of the weft inserting apparatus for a rapier loom of another embodiment of the present invention;
Figure 13 is the view that is similar to Fig. 2, and expression is according to the major part of the weft inserting apparatus for a rapier loom of another embodiment of the present invention;
Figure 14 is the view that is similar to Fig. 2, and expression is according to the major part of the weft inserting apparatus for a rapier loom of another embodiment of the present invention;
Timing diagram shown in Figure 15 is represented to applying voltage condition according to the used electromagnet of the weft inserting apparatus of another embodiment of the present invention;
The amplification view that part shown in Figure 16 is blocked is represented according to another embodiment of the present invention, is used to drive the structure of the piezo-electric device of movable gripper member;
Figure 17 is the view of similar Fig. 2, and expression is according to the major part of the weft inserting apparatus for a rapier loom of another embodiment of the present invention.
The contrast accompanying drawing describes preferred embodiment of the present invention in detail now.The identical in the following description identical or corresponding part of piece number representative.In addition, speech such as " left side ", " right side " is for convenience in the following description, is not word of limitation.
At first contrast the weft inserting apparatus of Fig. 1-4 description according to the Rapier looms of first embodiment of the invention, wherein, label 1 representative is suitable for inserting from the wefting insertion origination side weft insertion rapier head of the race that limits between the warp layer (not drawing), and label 2 representatives are suitable for inserting from the wefting insertion end side receiving rapier head of race.Weft insertion rapier 1 and receiving rapier head 2 are fixedly mounted in arrow shaft respectively with 3 and 4 end, and arrow shaft is with 3 and 4 respectively on rapier wheel 5 and 6.Rapier wheel 5 and 6 switched in opposite ground are anti-toward rotating.More particularly, when rapier wheel 5 is just changeing (promptly with assigned direction rotate), weft insertion rapier 1 insert through between race, and during rapier wheel 5 counter-rotatings (promptly with the opposite backward rotation of above-mentioned assigned direction), weft insertion rapier 1 is withdrawn from race.On the other hand, when rapier wheel 6 was just changeing, receiving rapier head 2 inserted the race that is limited by warp, and when rapier wheel 6 counter-rotatings, receiving rapier head 2 withdrawals.
Shown in Fig. 3 and 4, movable wefting insertion yarn gripper 8 be combined intos that a static wefting insertion yarn gripper 7 that weft insertion rapier 1 is made by a nonmagnetic substance and a magnetic material are made.Static wefting insertion yarn gripper 7 and supporting member 7a, yarn clipping face 7b and locating part 7c are whole to be formed.Movable wefting insertion yarn gripper 8, arrow shaft is fixed on the supporting member 7a by pinching screw 10 with 3 end and leaf spring 9.Movable wefting insertion yarn gripper 8 is made the effect of performance spring by the rubber-like metal material.Form a yarn clipping face 8a in the end of movable wefting insertion yarn gripper 8.Yarn clipping face 7a and 8a are suitable for and can be in contact with one another dividually.The effect of locating part 7c be restraint wefting insertion yarn gripper 8 to bottom offset.
Now consult Fig. 2 and 3, static latitude yarn gripper 11 and active receiving latitude yarn gripper 12 be combined intos that magnetic material is made of being subjected to that receiving rapier head 2 is made by a nonmagnetic substance.Active receiving latitude yarn gripper 12 is installed in static being subjected on the latitude yarn gripper 11 swingably by pivot 13.Active receiving latitude yarn gripper 12 is made by metal material.Opposed facing yarn clipping face 11a and 12a form in the static end of latitude yarn gripper 11 and active receiving latitude yarn gripper 12 that is subjected to respectively.Yarn clipping face 11a and 12a are suitable for and can be in contact with one another dividually.Arrow shaft is fixedly mounted on the active receiving latitude yarn gripper 12 by pinching screw 14 with 4 end.Static latitude yarn gripper 11 and supporting member 11b and the locating part 11c integral body of being subjected to forms.Stage clip 15 is arranged between supporting member 11b and the active receiving latitude yarn gripper 12.Locating part 11c plays the effect of retainer, be used for restraint be subjected to latitude yarn gripper 12 to bottom offset.
When rapier wheel 5 and 6 is just changeing respectively, weft insertion rapier 1 and receiving rapier head 2 move into respectively through between race, just joining mutually at the middle part of woven width of fabric direction.On the other hand, when rapier wheel 5 and 6 reversed respectively, weft insertion rapier 1 and receiving rapier head 2 were from race withdrawal that thread layer limited.The position of weft insertion rapier shown in Figure 11 is called the withdrawal dead point for race position, this position farthest between warp.Equally, the position of receiving rapier head 2 shown in Figure 1 is race position farthest between warp, and this position is called the withdrawal dead point of receiving rapier head 2.
Receiving rapier head 2 is suitable for sliding along slay 17, and slay 17 is supporting the operating path of ryce 16, receiving rapier head 2, that is, the wefting insertion path is through design, makes it not interfere ryce 16 to farthest the time from just contracting at the fell of woven fabric.As shown in Figure 1, electromagnet 18 and 19 is contained in respectively on the both ends of slay 17.More particularly, electromagnet 18 is installed near on the position under the wefting insertion path of weft insertion rapier 1, and electromagnet 19 then is contained near on the position under the wefting insertion path of receiving rapier head 2.In addition, a pair of electromagnet 20 and 21 is embedded in respectively in the middle part of slay 17.More particularly, electromagnet 20 is contained near on the position under the wefting insertion path of weft insertion rapier 1, and electromagnet 21 then is contained near on the position under the wefting insertion path of receiving rapier head 2.
The magneto motive field regions of electromagnet 18 is positioned near the withdrawal dead point of weft insertion rapier 1, and the corresponding field regions of electromagnet 19 is positioned near the withdrawal dead point of receiving rapier head 2.On the other hand, the field regions of electromagnet 20 is positioned at the position of weft insertion rapier 1 a junction receiving rapier head 2, that is, and and near the wefting insertion dead point of weft insertion rapier 1.On the other hand, the field regions of electromagnet 21 is positioned at the position of receiving rapier head 2 junction weft insertion rapier 1, that is, and and near the wefting insertion dead point of receiving rapier head 2.The magneticaction of electromagnet 18 is on the movable wefting insertion yarn gripper 8 that is positioned near the weft insertion rapier of the withdrawal dead-centre position 1, and the magnetic force of electromagnet 20 then acts near the movable wefting insertion yarn gripper 8 of the weft insertion rapier that is positioned at the wefting insertion dead-centre position 1.Equally, the magneticaction of electromagnet 21 be positioned at the wefting insertion dead-centre position near the active receiving latitude yarn gripper 12 of movable receiving rapier head 2 on.
Under the influence of the magnetic force of electromagnet 18 and 20, make the elasticity of movable wefting insertion yarn gripper 8 resistances self elasticity and leaf spring 9 and crooked or do angular displacement towards electromagnet 18 and 20 around the fulcrum that supporting member 7a forms.Because above-mentioned angular displacement, movable wefting insertion yarn gripper 8 is made evolution from weft grip position shown in Figure 2 to weft release position shown in Figure 3.Moving downward by locating part 7c of movable wefting insertion yarn gripper 8 is spacing.Under the situation that limited 7C of moving downward of movable wefting insertion yarn gripper 8 blocks, movable wefting insertion yarn gripper 8 occupies the position of the most close electromagnet 18 and 20.But warp thread prevents to be sandwiched in movable wefting insertion yarn gripper 8 and electromagnet 18 reliably; Between 20, thereby can avoid sustaining damage.
Equally, under the influence of the magnetic force of electromagnet 19 and 21, make the elastic force of active receiving latitude yarn gripper 12 resistance stage clips 15 crooked or do angular displacement towards electromagnet 19 and 21 around pivot 13.Because this angular displacement, active receiving latitude yarn gripper 12 is made evolution from weft grip position shown in Figure 2 towards weft release position shown in Figure 3.Active receiving latitude yarn gripper 12 move down the restriction that is subjected to locating part 11c.Under active receiving latitude yarn gripper 12 situation spacing by locating part 11c, active receiving latitude yarn gripper 12 occupies the position near electromagnet 19 or 21.But warp avoids being clipped in active receiving latitude yarn gripper 12 and electromagnet 19 reliably; Between 21, therefore avoid sustaining damage.
As shown in Figure 1, under the control of control computer C, the electromagnet 18,19,20 and 21 that is used as the magnetic force bringing device is to connect power supplys by drive circuit 22,23,24 and 25 respectively.More particularly, the drive circuit 22 to 25 that is used as voltage adjusting device is respectively to electromagnet 18,19, and 20 and 21 apply a rated voltage V0.On the other hand, control computer (also the claiming the computerization controller) C that applies control device as voltage is provided with voltage and applies regularly adjustment unit 27 and rotary encoder 28.Voltage applies regularly adjustment unit 27 and is used for importing the control signal that the voltage that is respectively electromagnet 18-21 applies timing to control computer C.On the other hand, rotary encoder 28 is used to detect the rotational angle or the position, angle of loom.On basis from the loom rotational angle information of rotary encoder 28, control computer C sends the instruction that applies rated voltage V0 to drive circuit 22 to 25, in response to these instructions, drive circuit applies rated voltage V0 to electromagnet 18 to 21 respectively with the timing of preset.
Now consult Fig. 4, waveform D 1Representative puts on the size and the timing of the voltage of electromagnet 18, and waveform D 2Representative puts on the size and the timing of the voltage of electromagnet 19.In addition, waveform E 1Representative puts on the size and the timing of the voltage of electromagnet 20, and waveform E 2Role of delegate is in the size and the timing of the voltage of electromagnet 21.In the timing diagram of Fig. 4, ordinate is represented voltage V, and abscissa is represented the soft angle θ of loom.Waveform D 1, D 2, E 1And E 2The voltage of expression is rated voltage V0.Apply the timing T of rated voltage V0 D1, T D2, T E1And T E2Apply regularly adjustment unit 27 by voltage and adjust, so that be input to subsequently among the control computer C.Position, the loom angle information that detects at rotary encoder 28 and come self-timing adjustment unit 27 apply regularly T about voltage D1, T D2, T E1And T E2The basis of information on, control computer C sends the voltage instruction of exerting pressure to drive circuit 22 to 25.In response to above-mentioned instruction, drive circuit 22 to 25 applies rated voltage V0 to electromagnet 18 to 21 respectively.
When applying waveform D 1Voltage the time, the movable wefting insertion yarn gripper 8 of weft insertion rapier 1 from weft grip position to the weft release position conversion.Then, be under the state of weft release position weft insertion rapier 1 a beginning wefting insertion at movable wefting insertion yarn gripper 8.The withdrawal dead-centre position near, movable wefting insertion yarn gripper 8 from weft release position to the weft grip position conversion.By above-mentioned evolution, weft yarn is left between the wefting insertion yarn gripper 7 and 8 folder filling face 7b and 8b of weft insertion rapier 1.Near the withdrawal dead-centre position, weft insertion rapier 1 is batched weft yarn Y on the quilling position, thereby makes weft yarn Y insert race.Electromagnet 18 is as the magnetic means that batches weft yarn.
As shown in Figure 2, receiving rapier head 2 is prior to weft insertion rapier 1 an arrival wefting insertion dead-centre position.The active receiving latitude yarn gripper 12 of receiving rapier head 2 that arrives the wefting insertion dead-centre position is in response to by waveform E 2The voltage application of expression transforms to weft release position from weft grip position.Then, receiving rapier head 2 is in the arrival of waiting for weft insertion rapier 1 under the state of weft release position at active receiving latitude yarn gripper 12.A 1 weft yarn Y who clamps is transferred to receiving rapier head 2 by the weft insertion rapier that has arrived the wefting insertion dead-centre position, thereby between its folder filling face 11a and 12a.When weft yarn Y was between folder filling face 11a and 12a, the voltage of electromagnet 21 applied interruption, and therefore, active receiving latitude yarn gripper 12 is converted into weft grip position from weft release position.By this evolution, weft yarn Y now is clipped between the yarn clipping face 11a and 12a of receiving rapier head 2, as shown in Figure 3.The movable gripper member 18 of weft insertion rapier 1 that arrives the wefting insertion dead-centre position is in response to waveform E 1The voltage of expression applies, and is converted into weft release position from weft grip position.Therefore, weft yarn Y breaks away from the folder latitude effect of weft insertion rapier 2.Therefore, we can say electromagnet 20 as wefting insertion magnetic force bringing device, and electromagnet 21 is as being subjected to latitude magnetic force bringing device.
Thereafter, weft insertion rapier 1 and receiving rapier head 2 move behind withdrawal dead-centre position separately, make by receiving rapier head 2 fixing weft yarn Y to pass through a race.The active receiving latitude yarn clamping head 12 of receiving rapier head 2 that has reached weft release position near withdrawal before the dead-centre position is in response to waveform D 2The voltage of expression applies from weft grip position and is converted into weft release position, thereby makes weft yarn Y break away from the folder latitude effect of receiving rapier head 2.Therefore, we can say that electromagnet 21 is as loose weft magnetic force bringing device.Thereafter, ryce 16 begins beating operation from retracted position.
By top description as can be seen, gripper head 1 and 2 movable yarn gripper 8 and 12 are respectively when the effect that is converted into weft release position magnetic force from weft grip position under the effect of electromagnet 18-21 disappears, and movable yarn gripper 8 and 12 are converted into weft grip position from weft release position. Movable yarn gripper 8 and 12 driving force of evolution between weft grip position and weft release position is to be provided by the magnetic force of electromagnet 18-21 and gripper head 1 and 2 elastic force own.Therefore, the mechanism that makes movable yarn gripper 8 and 12 make evolution between weft grip position and weft release position will never interfere warp thread, and this just means that warp thread can be avoided damage fully when gripper head 1 and 2 work.
Reliable startup activity yarn gripper 8 and 12 design can guarantee the regularly best of gripper head 1 and 2 open and close operations under magneticaction, thereby are convenient to set the regularly best of weft yarn Y folder, pine operation.On the other hand, be convenient to set the best weft insertion rapier 1 that regularly just can guarantee of weft yarn folder, pine operation and batch weft yarn Y reliably, and pass on weft yarn Y reliably to receiving rapier head 2 from weft insertion rapier 1.Needn't the open and close weft insertion rapier 1 also can catch weft yarn Y.But, should be mentioned that weft yarn Y is directed between yarn clipping face 7b and the 8a, then under movable wefting insertion yarn gripper 8 is in the state of weft release position, movable wefting insertion yarn gripper 8 places weft grip position again, and the layout that such layout is caught latitude than weft insertion rapier 1 at closure state is more reliable.At this moment, also should replenish below a bit.Weft yarn Y is influential to the last introducing attitude of weft yarn Y from the timing of weft insertion rapier 1 pine oil, thereby also influences the quality of fabric.In addition, be easy to set the best quality that regularly also help improve fabric of weft yarn Y from weft insertion rapier 1 pine oil.
Be installed in the electromagnet 18 and 20 and the movable wefting insertion yarn gripper 8 of weft insertion rapier 1 on the slay 17, its mutual position is very near when each electromagnet 18 and 20 is connected.Therefore, electromagnet 18 and 20 magnetic force can act on the movable wefting insertion yarn gripper 8 effectively.Equally, be contained on the slay 17 electromagnet 19 and 21 and the active receiving latitude yarn gripper 12 of receiving rapier head 2 mutual alignment when electromagnet 19 and 21 starts very approaching, therefore, electromagnet 19 and 21 can act on the active receiving latitude yarn gripper 12 effectively.In addition, by the elasticity of setting activity wefting insertion yarn gripper suitably 8 itself and the spring force of leaf spring 9, movable wefting insertion yarn gripper 8 can be to be converted into weft release position from weft grip position at a high speed.Equally, by the spring force of suitable setting stage clip 15, active receiving latitude yarn gripper 12 can be to be converted into weft grip position from weft release position at a high speed.Here it should be noted that the elasticity of movable wefting insertion yarn gripper 8 itself and the spring force of leaf spring 9 should be selected enough greatly so that inerrably clamp weft yarn Y.Equally, the spring force of stage clip 15 also should must be enough to clamp reliably weft yarn greatly.The size of rated voltage V0 should be selected to such an extent that can revolt above-mentioned spring force and make movable yarn gripper 8 and 12 be converted into weft release position from weft grip position.
Therefore, in conjunction with the magnetic force and the spring force of preset, the conversion of movable yarn gripper 8 and 12 between weft grip position and weft release position can be carried out apace by suitably.In addition, establish leaf spring 9 with the aforementioned manner folder and be convenient to set needed spring force.By number that changes leaf spring 9 or the adjustment that its length can easily realize leaf spring 9 spring forces.Obviously, movable yarn gripper 8 and 12 can make loom work under high rotating speed in the high speed conversion between weft grip position and the weft release position.
According to present embodiment of the present invention, use the open and close gripper head 1 of electromagnet 18 to 21 and 2 device, compare the more simple compactness of structure with the disclosed yarn clip board loosening device of aforementioned JP-A-5-195373.In the yarn clip board loosening device structure of prior art, the bar of open and close gripper head directly contacts with gripper head.Therefore, bar and gripper head will be worn, thereby cause gripper head aperture and open and close error regularly.In addition, fricative heat can influence the part precision that constitutes gripper head.Certainly, the deviation of the wearing and tearing of gripper head and element precision can form the obstacle that weft yarn Y reliably passes on to receiving rapier head from the weft insertion rapier head.Yet in the device of present embodiment of the present invention, the conversion of movable yarn gripper 8 and 12 between weft grip position and weft release position is contactless property, therefore, can not take place owing to the direct contact type open and close is handled the wearing and tearing cause and the loss of element precision.
In addition, the gap between the gripper head 1 and 2 that moves on slay 17 end faces is with done with high accuracy.Therefore, electromagnet 18-21 has improved the precision in the gap between electromagnet 18-21 and movable yarn gripper 8 and 12 in the structure of installing on the slay 17.Obviously, electromagnet 18 and 21 and movable yarn gripper 8 and 12 between this high accuracy in gap highly beneficial to realizing the high speed position conversion of movable yarn gripper 8 and 12 between weft grip position and weft release position.
Now contrast Fig. 5 and 6 and describe an alternative embodiment of the invention.As shown in Figure 6, the slay of the weft inserting apparatus of present embodiment is divided into three slay spare 17a, 17b and 17c at the middle part of fabric width direction.Each slay spare 17a, 17b and 17c are bearing on rocker 30 (see figure 5)s by lay sword 29, and rocker 30 is suitable for swinging back and forth by reed driving mechanism (not drawing).Cross side at slay spare 17a and 17c is equipped with electromagnet 18 and 19 respectively.One electromagnet 20 is clipped between slay spare 17a and the 17b, and another electromagnet 21 is clipped between slay spare 17b and the 17c.Each electromagnet 18-21 is bearing on the brest beams 32 by carriage 31.Incidentally, brest beams 32 is used to support and prevents that fabric to the fell plate of bottom offset (drawing), preventing the side shoring device and the expander roll of fabric pincher, and wherein, the position relation between slay 17 and the brest beams 32 will guarantee very high precision.Therefore, high accuracy can be easily realized in the gap that is bearing between the movable yarn gripper 8 and 12 of electromagnet 18-21 on the brest beams 32 and gripper head 1 and 2.In addition, because electromagnet 18-21 and electric wire thereof fixedly install, so can prevent reliably that electric wire from fractureing and electromagnet 18-21 breaks down.In addition, slay 17 overall weights are light, help increasing the speed of beating operation.
Now consult another embodiment that Fig. 7 and 8 describes weft inserting apparatus of the present invention.Wherein Fig. 7 also will use when describing Fig. 8-10 illustrated embodiment.In the weft inserting apparatus according to present embodiment of the present invention, the movable wefting insertion yarn gripper 8A of weft insertion rapier 1 comprises a non-magnetic member 8b and a magnetic part 8c who is oppositely arranged with electromagnet.Equally, the active receiving latitude yarn gripper 12A of receiving rapier head 2 comprises a non-magnetic member 12b and a magnetic part 12c, and magnetic part 12c and electromagnet are oppositely arranged.Non-magnetic member 8b and 12b are preferably made by resin material, and magnetic part 8c and 12c are preferably made by metal material, are in order to alleviate the weight of gripper head 1 and 2 like this.Obviously, the gripper head 1 and 2 than light structure helps it with high-speed motion or operation.
The installation site of electromagnet 18-21 is identical with situation according to the weft inserting apparatus of first embodiment of the invention.Instruction output rated voltage and overexcitation voltage V that the drive circuit 22A of electromagnet 18-21,23A, 24A and 25A send in response to control computer c respectively 1One of.Now consult Fig. 8, waveform D 3Representative is applied to the size and the timing of the voltage on the electromagnet 18, and waveform D 4Expression is applied to the size and the timing of the voltage on the electromagnet 19.In addition, waveform E 3Expression is applied to the size and the timing of the voltage on the electromagnet 20, and waveform E 4Representative is applied to the size and the timing of the voltage on the electromagnet 21.By waveform D 3, D 4, E 3And E 4Each voltage of expression has a rated voltage V0 and an overexcitation voltage V 1Apply the timing Td of rated voltage V0 03, Td 04, Te 03And Te 04, and apply overexcitation voltage V 1Timing Td 13, Td 14, Te 13And Te 14Be to apply regularly adjustment unit 27 adjust and input control computer c by voltage.Apply on the basis of information regularly in the loom angle position information of being measured by rotary encoder 28 with about above-mentioned voltage, control computer C sends to drive circuit 22A-25A and applies rated voltage V0 or overexcitation voltage V 1Voltage apply instruction.Apply instruction in response to above-mentioned voltage, apply rated voltage V0 and overexcitation voltage V to electromagnet 18-21 respectively with timing shown in Figure 8 1
When the magneticaction of electromagnet 18 and 20 is on the wefting insertion yarn gripper 8A mobile in response to magnetic, and when the magneticaction of electromagnet 19 and 20 mobile in response to magnetic when being subjected on the latitude yarn gripper 12A, at first with overexcitation voltage V 1Act on electromagnet 18; 20 and electromagnet 19; On 21.In succession in overexcitation voltage V 1Apply, apply rated voltage V0 again.In response to overexcitation voltage V 1Apply, movable yarn gripper 8A and 12A are converted into weft release position from weft grip position rapidly.Obviously, the rapid conversion of movable yarn gripper 8A and 12A can improve the service speed of loom.
Now consult Fig. 7 and 9 weft inserting apparatuss of describing according to another embodiment of the present invention.In this weft inserting apparatus, the movable wefting insertion yarn gripper 8B of weft insertion rapier 1 comprises a non-magnetic member 8b and a permanent magnet 8d, and wherein, permanent magnet and electromagnet are oppositely arranged.Equally, the active receiving latitude yarn gripper 12B of receiving rapier head 2 comprises a non-magnetic member 12b and a permanent magnet 12d who is oppositely arranged with electromagnet.The installation site of electromagnet 18-21 is identical with situation in the described weft inserting apparatus of first embodiment of the invention.
The drive circuit 22B of electromagnet 18-21,23B, 24B and 25B are respectively applied for rated voltage (+) V0 of the instruction output cathode that sends according to control computer C and rated voltage (-) V0 of negative polarity.Now consult Fig. 9, waveform D 5Expression is applied to the size and the timing of the voltage on the electromagnet 18, and waveform D 6Representative is applied to the size and the timing of the voltage on the electromagnet 19.In addition, waveform E 5Expression is applied to the size and the timing of the voltage on the electromagnet 20, and waveform E 6Expression is applied to the size and the timing of the voltage on the electromagnet 21.Timing (+) Td of the positive rated voltage (+) of exerting pressure V0 5, (+) Td 6, (+) Te 5(+) Te 6, and timing (-) Td that applies negative rated voltage (-) V0 5, (-) Td 6, (-) Te 5(-) Te 6Apply regularly adjustment unit 27 by voltage and set, so that input control computer C.Control computer C is in loom angle position information that rotary encoder 28 is measured and apply about above-mentioned voltage on the basis of information regularly and to send the voltage that applies positive rated voltage (+) V0 or negative rated voltage (-) V0 to drive circuit 22B and 25B and apply instruction.Apply instruction according to above-mentioned voltage, drive circuit 22B to 25B applies rated voltage (+) V0 of positive polarity or rated voltage (-) V0 of negative polarity to electromagnet 18-21 when shown in Figure 9 respectively.
When being provided with the magneticaction of electromagnet 18 and 20, movable wefting insertion yarn gripper 8B remains on weft grip position under the effect of the spring force of itself elasticity and leaf spring 9.Equally, when electromagnet 19 and 21 all during the access failure power supply, active receiving latitude yarn gripper 12B remains on the weft grip position under the effect of the spring force of stage clip 15.The magnetic force that produces when applying rated voltage (+) V0 of positive polarity is the magnetic attracting force to movable yarn gripper 8B and 12B, and the magnetic force that produces when applying rated voltage (-) V0 of negative polarity then is magnetic repulsion force.The magnetic attracting force that produces when applying positive polarity rated voltage (+) V0, movable yarn gripper 8B and 12B are converted into weft release position from weft grip position.On the other hand, the magnetic repulsion force that produces when applying negative polarity rated voltage (-) V0, movable yarn gripper is converted into weft grip position from weft release position.By this way, movable yarn gripper 8B and 12B realize by making electromagnet 18-21 connect power supply in the above described manner to the evolution of weft grip position from weft release position.Therefore, with regard to weft insertion rapier 1, the big I of the folder latitude elastic force under the effect of the spring force of the elasticity of movable wefting insertion yarn gripper 8B itself and leaf spring 9 is reduced to necessary minimum of a value.This also is applicable in order to make receiving rapier head 2 can press from both sides the spring force of the stage clip 15 of latitude.Select as far as possible for a short time the elasticity of movable wefting insertion yarn gripper 8B and the spring force of leaf spring 9 in the above described manner, so just can be with higher speed realization activity wefting insertion yarn gripper from the conversion of weft grip position to weft release position.Equally, the spring force of stage clip 15 is selected to such an extent that the as far as possible little active receiving latitude yarn gripper 12B that also can make can realize at faster speed from the conversion of weft grip position to weft release position.
Contrast Fig. 7 and 10 describes the weft inserting apparatus of another embodiment of the present invention below, and in this weft inserting apparatus, the movable wefting insertion yarn gripper 8B of weft insertion rapier 1 comprises a non-magnetic member 8b and a permanent magnet 8d, and wherein permanent magnet and electromagnet are oppositely arranged.Equally, the active receiving latitude yarn gripper 12B of receiving rapier head 2 comprises a non-magnetic member 12b and a permanent magnet that is oppositely arranged with electromagnet.The installation site of electromagnet 18-21 is identical with situation in the weft inserting apparatus of first embodiment of the invention.
Rated voltage (+) V0 of positive polarity, rated voltage (-) V0 of negative polarity, overexcitation voltage (+) V of positive polarity are sent in the instruction that the drive circuit 22c of electromagnet 18-21,23c, 24c and 25c send according to control computer C respectively 1Overexcitation voltage (-) V with negative polarity 1One of.Now consult Figure 10, waveform D 7Expression is applied to the size and the timing of the voltage on the electromagnet 18, and waveform D 8Representative is applied to the size and the timing of the voltage on the electromagnet 19.In addition, waveform E 7Expression acts on the size and the timing of the voltage on the electromagnet 20, and waveform E 8Expression acts on the size and the timing of the voltage on the electromagnet 21.Timing (+) Td that positive rated voltage (+) V0 applies 07, (+) Td 08(+) Te 07, (+) Te 08, and timing (-) Td that applies of negative rated voltage (-) V0 07, (-) Td 08(-) Td 07, (-) Td 08Apply regularly adjustment unit 27 by voltage and set, then input control computer C.Equally, overexcitation voltage (+) V of positive polarity 1Timing (+) Td that applies 17, (+) Td 18, (+) Te 17, (+) Te 18, and overexcitation voltage (-) V of negative polarity 1Timing (-) Td that applies 17, (-) Td 18, (-) Te 17, (-) Te 18It is predetermined to apply regularly adjustment unit 27 by voltage, then input control computer C.On loom angle position information that control computer C obtains in rotary encoder 28 outputs and the basis that applies timing about above-mentioned voltage, to drive circuit 22C; 25C sends rated voltage (+) V0 that applies positive polarity, rated voltage (-) V0 of negative polarity, overexcitation voltage (+) V of positive polarity 1Overexcitation voltage (-) V with negative polarity 1Voltage apply instruction.Apply instruction according to above-mentioned voltage, drive circuit 22C to 25C applies rated voltage (+) V0 of positive polarity, rated voltage (-) V0 of negative polarity, overexcitation voltage (+) V of positive polarity respectively selectively with timing shown in Figure 10 to electromagnet 18-21 1Or rated voltage (-) V of negative polarity 1
The weft inserting apparatus of present embodiment of the present invention can be obtained and contrast Fig. 8 and the identical advantage of 9 described embodiment.In addition, because when weft release position transforms to weft grip position, apply overexcitation voltage as movable wefting insertion yarn gripper 8B or active receiving latitude yarn gripper 12B, so movable yarn gripper 8B or 12B can realize under higher speed from the conversion of weft release position to weft grip position.Certainly, movable yarn gripper 8B and 12B help to realize running up of loom from weft release position to the high speed conversion of weft grip position.Movable wefting insertion yarn gripper 8B makes weft insertion rapier 1 catch latitude and runs up, and can quicken the wefting insertion startup operation of weft insertion rapier 1 effectively.
Figure 11 represents a kind of modification of weft inserting apparatus, and wherein, movable yarn gripper 8B and 12B also are provided with permanent magnet 8d and 12d.When movable yarn gripper 8B and 12B from weft release position during to the weft grip position conversion, as waveform D 9, D 10, E 9, E 10Shown in, at first apply overexcitation voltage (+) V of positive polarity 1But, when movable yarn gripper 8B or 12B when weft release position is converted into weft grip position, only apply rated voltage (-) V0 of negative polarity.When movable wefting insertion yarn gripper 8B or active receiving latitude yarn gripper utilize overexcitation voltage (+) V of positive polarity when weft release position transforms to weft grip position 1, like this, the spring force of the elasticity of movable yarn gripper 8B and 12B and leaf spring 9 and stage clip 15 can be increased, this again can raising activity yarn gripper 8B or 12B from the conversion rate of weft release position to weft grip position.
Contrast Figure 12 and 13 descriptions are according to the weft inserting apparatuss of other embodiment of the present invention below.In these embodiments, in static yarn gripper 7 and 11, be respectively equipped with locating part 7C and 11C.For substituting these locating parts, in the embodiment shown in fig. 12, the buffer substrate tablet 33 of soft material such as fleece is fixed on slay 17 and electromagnet 20 and 21, and in the embodiment shown in fig. 13, buffer substrate tablet 33 just is separately fixed on the electromagnet 18-21.When movable wefting insertion yarn gripper 8A (or 8B) and active receiving latitude yarn gripper 12A (or 12B) were on the weft release position, warp thread was clipped in movable yarn gripper 8A (or 8B); Between 12A (or 12B) and the buffer substrate tablet 33.In this case, the effect of buffer substrate tablet 33 is to prevent to be clipped in movable yarn gripper 8A (or 8B); Warp thread between 12A (or 12B) and the electromagnet sustains damage.Also should be mentioned that and locating part 7C is not set and 11C helps to alleviate the weight of gripper head 1 and 2.
Also should be mentioned that except that fleece manufacturings such as the also available synthetic resin of buffer substrate tablet 33, leather, other fabric along band.
Consult Figure 14 and 15 below and describe an alternative embodiment of the invention.In the weft inserting apparatus of present embodiment, a plurality of (in this example being 3) electromagnet 20A, 20B and 20C is set near the wefting insertion dead-centre position along the wefting insertion path.In addition, a plurality of (in this example being 3) electromagnet 21A, 21B and 21C arranged near the wefting insertion dead-centre position of receiving rapier head 2 along the wefting insertion path.Electromagnet 20A, 20B, 20C is as wefting insertion magnetic force bringing device, and electromagnet 21A, 21B and 21C are as being subjected to latitude magnetic force bringing device.The movable yarn gripper of weft insertion rapier 1 adopts movable wefting insertion yarn gripper 8A or 8B shown in Figure 7, and the movable yarn gripper of receiving rapier head 2 then adopts active receiving latitude yarn gripper 12A or 12B.
Waveform E among Figure 15 11Representative is by drive circuit 24D 1Be applied to the size and the timing of the rated voltage on the electromagnet 20A.On the other hand, the waveform E among the same figure 12Expression is by drive circuit 24D 2Be applied to the size and the timing of the rated voltage on the electromagnet 20B.In addition, waveform E 13Expression drive circuit 24D 3Be applied to the size and the timing of the rated voltage on the electromagnet 20C, and waveform E 14Expression drive circuit 25E 1Be applied to the size and the timing of the rated voltage on the electromagnet 21A.In addition, waveform E 15Expression drive circuit 25E 2Be applied to the size and the timing of the rated voltage on the electromagnet 21B, and waveform E 16Represent drive circuit 25E 3Be applied to the size and the timing of the rated voltage on the electromagnet 21C.Electromagnet 21A, 21B and 21C are that the mode with relay applies voltage and eliminates voltage, so just can examine in bar head 1 moving process at wefting insertion, make movable wefting insertion yarn gripper 8A (or 8B) carry out evolution between weft grip position and weft release position.Equally, electromagnet 21A, 21B and 21C also apply and eliminate voltage with relay system, even like this when receiving rapier head 2 is moving, active receiving latitude yarn gripper 12A (or 12B) also can carry out evolution between weft grip position and weft release position.Therefore, even carry out also can guaranteeing in short time of wefting insertion that in gripper head 1 and 2 cooperations time enough carries out movable wefting insertion yarn gripper 8A (or 8B) and active receiving latitude yarn gripper 12A (or 12B) respectively at weft grip position be subjected to evolution between the latitude position.Here it should be noted that movable wefting insertion yarn gripper 8A (or 8B) and active receiving latitude yarn gripper 12A (or 12B) have intercropping evolution when enough just can guarantee that passing on the reliability of weft yarn from weft insertion rapier 1 to receiving rapier head 2 is improved.
As a kind of improvement to the weft inserting apparatus of present embodiment of the present invention, when employing activity wefting insertion yarn gripper 8B and active receiving latitude yarn gripper 12B, can be in succession after the applying of positive polarity voltage, electromagnet is applied the voltage of negative polarity.So just can obtain and similar advantage embodiment illustrated in fig. 9.Improve as another kind, can be only to the operation of weft insertion rapier 1 or only to the operation of receiving rapier head 2, electromagnet is applied and eliminates voltage in the mode of relay.
At last, consult Figure 16 and 17 and describe an alternative embodiment of the invention.In the weft inserting apparatus of present embodiment, in weft insertion rapier 1, the bottom part of flexible movable wefting insertion yarn gripper 8c is securely fixed on the static wefting insertion yarn gripper 7A.Piezo-electric device 35 is clipped between the wefting insertion yarn gripper 8C of static wefting insertion yarn gripper 7A and activity.On the other hand, in receiving rapier head 2, flexible movable wefting insertion yarn gripper 8C is fixed on static being subjected on the latitude yarn gripper 11A.Equally, piezo-electric device 36 is clipped in static be subjected to latitude yarn gripper 11A and movable being subjected between the latitude yarn gripper 12C.The electric wire that is connected in piezoelectricity device 35 and 36 is with 3 and 4 to lay along arrow shaft respectively.
As shown in figure 16, the structure of piezo-electric device 35 (or 36) is: piezoelectric elements 35a (or 36a) and electric conductor 35b (or 36b) are staggered stacked, and piezoelectric elements 35a (or 36a) is clipped between the electric conductor 35b (or 36b).The electric conductor 35b that clips piezoelectric elements 35a or 36a is being connected the power supply positive electrode with one of 36b, and another is connecting negative electrode.When piezo-electric device 35 or 36 applies voltage, piezoelectric elements 35a or 36a expand on stacked direction, thereby make piezo-electric device 35 or 36 bulk expansion.The movable wefting insertion yarn gripper 8C of weft insertion rapier head is being in weft grip position when piezo-electric device 35 applies voltage, be converted into weft release position in response to the elimination of the voltage that applies.On the other hand, when piezo-electric device 36 applies voltage, the active receiving latitude yarn gripper 12C of receiving rapier head is in weft grip position, and is converted into weft release position when the voltage that puts on piezo-electric device 36 is eliminated.Though the breathing amount of piezo-electric device 35,36 is little, owing to the rod-type effect of flexible movable wefting insertion yarn gripper 8C and active receiving latitude yarn gripper 12C is amplified, thereby expand/contracting of piezo-electric device 35 or 36 can cause effective displacement of folder filling face 8a and 12a.Therefore, this mechanism of the position of conversion activity yarn gripper 8c or 12c can prevent to interfere warp thread reliably between weft grip position and weft release position, in other words, can prevent effectively that warp thread is owing to the operation of shifting one's position of weft insertion rapier 1 and receiving rapier head 2 sustains damage.
Movable yarn gripper 8c or 12c are reliably owing to expand/contracting of piezo- electric device 35 or 36 moved, and this structure is convenient to set the regularly best of gripper head 1 and 2 map functions, thereby help setting the regularly best of folder latitude and inspection latitude.On the other hand, the best weft insertion rapier 1 that quantitatively just can guarantee that can set folder latitude and loose weft is easily batched weft yarn Y reliably and is reached reliably weft yarn Y is delivered to receiving rapier head 2 from weft insertion rapier 1.
In the weft inserting apparatus of present embodiment, the spring part of folder latitude is no longer necessary.In addition, make the mechanism of movable yarn gripper 8c and 12c conversion between folder latitude and weft release position only need the little piezo-electric device of size to realize, so just can make aforementioned mechanism more simple compact.In addition, the electric wire that connects piezo-electric device can be used band or alternative with the strap-like member of conductive material.In addition, drive unit can adopt the form of wireless drive unit.
In according to weft inserting apparatus of the present invention, can use permanent magnet as the magnetic force bringing device.For example, a permanent magnet can be arranged near the wefting insertion origination side withdrawal dead-centre position.Passing on the movable yarn gripper of weft insertion rapier head of parallel when being in weft release position, begin wefting insertion by receiving rapier head.In this case, weft yarn can be caught reliably by the weft insertion rapier head when employing makes the magnetic action of permanent magnet catch the layout that significantly descends rapidly on the latitude time point.Perhaps, permanent magnet also can be arranged near the withdrawal dead-centre position of wefting insertion end side.The movable yarn gripper of receiving rapier head is in weft release position under the magneticaction that permanent magnet produces.Therefore, the weft yarn that is passed on by receiving rapier head is by by pine oil.
From top description as can be seen, in the weft inserting apparatus of Rapier looms, movable yarn gripper is by making the mode of magnetic force bringing device in the conversion between the state that does not act in response to the state of the mobilizable yarn gripper of magnetic force and magnetic force on the movable yarn gripper of its magneticaction in the conversion of the position between weft grip position and the weft release position, perhaps, applying voltage status or do not applying that between the voltage status mode of conversion realizes by piezo-electric device, because above-mentioned design, realized reliable wefting insertion operation, substantially avoided simultaneously advantageous effects, realized purpose of the present invention the damage of warp thread.
Illustrated many feature and advantage of the present invention in the superincumbent detailed description, those skilled in the art obviously can carry out various modifications, variation and combination and not exceed scope of the present invention it.
For example, the present invention can be applied in the end that a kind of each gripper head is fixed on bar, bar is done in the Rapier looms of straight reciprocating motion, also can be applied in a kind of and use a gripper head to insert the race that warp thread limits and carry out the loom of wefting insertion from the wefting insertion origination side.
Therefore various suitable modifications and equivalent all belong to scope of the present invention.

Claims (8)

1. the Weft insertion method of a Rapier looms, in described Rapier looms, gripper head (1,2) back and forth passes the race that is made of warp thread and moves, and makes weft yarn pass described race and Woven fabric, and each gripper head is by static and movable gripper member (7,8; 11,12) be combined into, described Weft insertion method is characterised in that:
Described movable gripper member (8,12) in response to magnetic force bears the magnetic force that is produced by magnetic force bringing device (20,21), so that occupy a weft grip position or a weft release position selectively;
Described magnetic force bringing device (20,21) conversion between first state and second state, it applies magnetic force to described movable gripper member (8,12) at described first state, described second state its not to described movable gripper member (8,12) apply magnetic force, wherein, when applying described magnetic force, at first to described magnetic force bringing device (20,21) apply an overexcitation voltage, and then apply a rated voltage;
Described movable gripper member (8,12) by make described magnetic force bringing device between described first state and described second state conversion and conversion between weft grip position and weft release position;
Weft yarn is converted into described weft grip position and is clamped by movable gripper member from described weft release position by making movable gripper member (8,12), and weft yarn is converted into described weft release position and by pine oil by making movable gripper member from described weft grip position.
2. the weft inserting apparatus of a Rapier looms, the gripper head device (1,2) of described loom back and forth passes the race that is formed by warp thread, makes weft yarn insert described race, so that Woven fabric, described gripper head is by static and movable gripper member (7,8; 11,12) be combined into, described movable gripper member (8; 12) when weft yarn is clamped with pine oil, pass through drive unit (5,6) conversion between weft grip position and weft release position, it is characterized in that:
Described movable gripper member (8; 12) responding part to small part by a magnetic force constitutes;
A plurality of magnetic force bringing devices (20,21) as described drive unit in series are provided with along the wefting insertion path of described gripper head device (1,2) mutually; And
Described movable gripper member (8; 12) conversion between described weft grip position and weft release position is by described magnetic force bringing device (20,21) conversion between first state and second state is carried out, in described first state, the magneticaction of described magnetic force bringing device is on described magnetic force response part, in described second state, the magnetic force of described magnetic force bringing device does not act on the described magnetic force response part.
3. weft inserting apparatus according to claim 2 is characterized in that: described gripper head device comprises weft insertion rapier head and receiving rapier head (1,2), and each gripper head comprises static and movable gripper member (7,8; 11,12), weft yarn is introduced into described race by delivering to described receiving rapier head by the weft yarn that described weft insertion rapier head is caught.
4. weft inserting apparatus according to claim 3, it is characterized in that: the magnetic force bringing device (20) of described weft insertion rapier head (1) is set in place near the wefting insertion dead-centre position on the wefting insertion path of described weft insertion rapier head (1), and the magnetic force bringing device (21) of described receiving rapier head (2) is set in place near the wefting insertion dead-centre position on the wefting insertion path of described receiving rapier head (2).
5. according to each described weft inserting apparatus in the claim 2 to 4, it is characterized in that: described magnetic force bringing device (20,21) is made of at least one electromagnet, and described weft inserting apparatus also comprises:
Voltage applies control device (c), and its voltage that is used to control described electromagnet applies;
Apply voltage level regulator (22-25), it is used to set the voltage level that is applied on the described electromagnet;
The voltage regularly regulator (27) of exerting pressure, it is used to set the timing that applies voltage to described electromagnet.
6. according to each described weft inserting apparatus among the claim 2-4, it is characterized in that: each described movable yarn gripper disposes spring assembly (15), described movable yarn gripper remains on folder latitude state under the effect of the spring force of described spring assembly (15), and is down-converted to the loose weft state in the effect of described magnetic force.
7. according to each described weft inserting apparatus among the claim 2-4, it is characterized in that: at described gripper head (1,2) also be provided with the magnetic force bringing device near the withdrawal dead-centre position, it is used for when described gripper head (1,2) arrives described withdrawal dead-centre position described movable gripper member (8; 12) be converted into described weft release position from described weft grip position.
8. according to the described weft inserting apparatus of claim 5, it is characterized in that: described magnetic force bringing device comprises an electromagnet, for described movable yarn gripper is converted into described weft release position from described weft grip position, applies overexcitation voltage to described electromagnet earlier, and then apply rated voltage.
CN95106585A 1994-06-06 1995-06-05 Weft insertion method and apparatus for rapier loom Expired - Fee Related CN1040675C (en)

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JP123903/94 1994-06-06
JP6123903A JPH07331558A (en) 1994-06-06 1994-06-06 Weft-insertion method for rapier loom and apparatus therefor

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CN103409890B (en) * 2013-07-18 2014-11-05 江南大学 Weft delivering feeding device for weaving bending-free fabric
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CN111705396B (en) * 2020-05-29 2022-06-03 江苏万邦特种纺织发展有限公司 Rapier loom weft insertion device for waterproof cloth of canoe and processing technology thereof

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KR960013897B1 (en) 1996-10-10
TW297841B (en) 1997-02-11
DE69518367T2 (en) 2001-02-22
CN1119681A (en) 1996-04-03
CN1077617C (en) 2002-01-09
JPH07331558A (en) 1995-12-19
DE69518367D1 (en) 2000-09-21
CN1203289A (en) 1998-12-30
EP0864678A1 (en) 1998-09-16
EP0690160B1 (en) 2000-08-16
EP0690160A1 (en) 1996-01-03
KR960001246A (en) 1996-01-25

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