CN1200778A

CN1200778A - Mechanical loom with pneumatic weft threat insertion

Info

Publication number: CN1200778A
Application number: CN 95197975
Authority: CN
Inventors: S·弗兰西斯科
Original assignee: Textilma AG
Current assignee: Textilma AG
Priority date: 1995-10-10
Filing date: 1995-10-10
Publication date: 1998-12-02
Anticipated expiration: 2015-10-10
Also published as: CN1061714C

Abstract

The invention concerns a mechanical loom comprising a weaving reed (8) and a weft thread guide device (32) which are interconnected so as to pivot between an insertion position and a stop position.In order to insert the weft, there are provided a stationary weft-insertion device (14) with at least one blower nozzle (22) for inserting a weft thread (38) into the guide duct(36),as well as a thread clamp(16)and scissors(15).The thread clamp (16) is coupled with the weaving reed in order to clamp an inserted weft thread(38)and convey it synchronously with the guide duct(36)from the insertion position to the stop position.The scissors(15)are arranged downstream of the thread clamp(16)in the stop direction in order to cut off the weft thread immediately after it has been clamped.Since the insertion device is stationary and the thread clamp and scissors are operatively associated with the weaving reed,control of the loom is simplified such that up to 16 different weft threads can be inserted.

Description

The loom of pneumatic weft insertion

The present invention relates to a kind of loom of pneumatic weft insertion.

From the known loom of prior art with various pneumatic weft insertions, wefting insertion or be installed in the rotating weft inserting apparatus of knitting on the reed by and realize wherein, or realize with a weft inserting apparatus that is fixedly mounted on the frame.

The loom that is provided with rotating weft inserting apparatus has some shortcomings, and each weft yarn of introducing will be clamped and cut off in knit the zone that reed beats up, and therefore the position that nozzle is incorporated into wefting insertion only could be realized in knitting the reed reseting procedure.This especially limits to some extent to the quantity of nozzle, but also a special control device must be set, the reed of knitting that weft inserting apparatus is housed causes higher inertia force in moving back and forth, thereby cause the unnecessary vibration of kinematic system, and make weft yarn from weft accumulator is incorporated into the process of nozzle, be in vibrational state out of control and cross one another and mat.Air pipe line and actuating unit also afford very high mechanical load, and this particularly need dispose the control system of a costliness for actuating unit.Owing to these shortcomings cause the high interference that is subjected to the rotating speed of loom is reduced, productivity ratio is incurred loss.Also have a shortcoming in addition, promptly yarn clamps and shearing device also is mounted on the frame and operate by independent transmission device, so causes higher cost of equipment.

Task of the present invention is to improve the loom of pneumatic weft insertion, makes it not have above-mentioned shortcoming.

According to the present invention, this task is to solve with the loom that is characterized in the claim.

Utilize the present invention obtainable advantage be that mainly it can use the weft yarn of 16 kinds of different cultivars of as many as and color.

The present invention will be described with reference to the accompanying drawings below.Wherein:

Fig. 1 is according to the skeleton diagram of an embodiment of the loom of air wefting insertion of the present invention;

The sectional side view in Fig. 2 loom wefting insertion zone;

The cutaway view of Fig. 3 III-III in Fig. 2;

The cutaway view of Fig. 4 IV～IV in Fig. 2;

The cutaway view of Fig. 5 V-V in Fig. 2;

The cutaway view of Fig. 6 VI-VI in Fig. 2;

The cutaway view of Fig. 7 VII-VII in Fig. 2;

An embodiment of the control device of Fig. 8 nozzle;

The cutaway view of Fig. 9 X-X in Fig. 2, the situation when it is illustrated in wefting insertion;

Situation when Figure 10 is used for representing that weft yarn is clamped according to the profile of Fig. 9;

Situation when Figure 11 is used for representing that weft yarn cuts off according to the profile of Fig. 9;

Situation when Figure 12 is used for representing that knitting reed beats up according to the profile of Fig. 9.

What the loom of being mentioned comprised that 1, one of a frame emits warp thread 3,4 from it here knits 8, one fabric traction mechanisms 9 of reed and a cloth beam 10 through 6, one of 5, one shedding motions of 2, back rest of axle in order to 7, one in devices introducing weft yarn.Shedding motion 6 constitutes a top shed 11 and lower shed 12 by heald with warp thread 3,4.

As shown in Figure 2, device 7 comprises that a pneumatic weft insertion device 14, is arranged on 15, one thread nipper assemblies 16 of scissors and one weft inserting apparatus 14 and knits the auxiliary device for blowing 17 on the yarn traffic direction between the reed 8.Weft inserting apparatus 14 is installed on the frame 1.Scissors 15 and thread nipper assembly 16 are with knitting reed 8 coupling mutually.Auxiliary device for blowing 17 with knit reed 8 and link to each other.

Weft inserting apparatus 14 comprises 23, one holders 24 of 22, one injection assemblies of 21, eight nozzles of a support unit and an operating means 25.Support unit 21 usefulness bolts 26 are fastened on the frame 1.Nozzle 22 be mounted in pairs and work on link to each other with a weft accumulator with a compressed air source.One end of nozzle 22 is to be removably mounted on the injection assembly 23.The holder 24 of injection assembly is connected with frame 21.Operating means 25 is connected with shedding motion 6 by a motion 27, so that nozzle 22 is put into insertion position.For this reason, injection assembly 23 is that the mouth of pipe of nozzle is rotated round the direction of extending to meet at right angles mutually with the structure of holder 24.Also have a spring 28 that telecontrol equipment 27 is remained under the pressurized situation.Here to point out that operating means 25 also can replace with a drive unit of being controlled by the control device of knowing, so that nozzle is put into the position of wefting insertion.

As shown in Figure 3, knitting reed 8 is installed on the reed baulk 31.One feed carrier 32 is housed on reed baulk.If feed carrier 32 comprise one be installed on the reed baulk air guiding portion spare 33 and many be arranged to comb shape, and respectively be provided with a menopause tablet 34 that is used for defining the space 35 of yarn-guiding duct, and the weft yarn 38 that is used for promoting to introduce makes it pass through the relaying nozzle 37 of yarn-guiding duct, will be more favourable then.Also can adopt so-called tunnel to knit reed and the relaying nozzle replaces feed carrier 32.

Also advantageously adopted auxiliary device for blowing 17 here in the loom of being mentioned.Auxiliary device for blowing is a flat object 41, and it has through hole 42 and an open seam road 43 of a taper.Object 41 is fastened on the air guiding portion spare 33.But also can make an auxiliary device for blowing (Fig. 4) to first menopause tablet 34.

Thread nipper assembly 16 has a folder and refers to 45 and clamps 46, and they respectively are provided with a flat board 47 and are used for holding weft yarn.Folder refers to be hinged on the axle 48 that is arranged on the frame 1.Clamp 46 directly knits reed 8 together and/or slay is connected.Also be provided with one in addition and be used to press from both sides the back-moving spring 49 that refers to, the one end abuts against on the frame 1, and the other end abuts against folder and refers to.A stop component 50 also is housed on frame 1 is used for fixing the position (Fig. 5) that folder refers to.

Scissors 15 comprises movably shear blade 52 of a fixing shear blade 51 and.Fixing shear blade 51 is contained on the frame 1, and movably shear blade 52 is contained in and knits (Fig. 6) on the reed 8.

Fig. 7 represents cooperating of nozzle and the yarn-guiding duct 36 that is limited by menopause tablet 34.A principal character of this loom is: when yarn-guiding duct occupied insertion position, corresponding a pair of nozzle was arranged to basically with the center line of yarn-guiding duct 36 and parallels.The adjusting of nozzle 22 realizes by operating means 25 and motion 27.Another method can be arranged to nozzle 22 a branch of.

As shown in Figure 8, for example a jacquard attachment or dobby device comprise that a color control device 56, compound gearing 57 and usefulness are hinged on the single-arm lever 58 on the frame 1 to shedding motion 6.This compound gearing and function thereof are known by people, therefore do not elaborate here.One moving component 27 is housed on lever 58, and its biconditional operation device 25 is connected.

Describe according to Fig. 9-12 pair of wefting insertion process below: in loom, final drive shaft is whenever goed around and is carried out a wefting insertion and beat up.From this machine cycles, can derive control to each element of loom.In the described in front loom, in general knit reed driving and with the relation of wefting insertion can only by nozzle 22 on insertion position adjusting and the introducing of weft yarn 38 control according to the corner of main shaft, the clamping of weft yarn 38 and the time point of cut-out then structurally with on the function are determined with knitting by scissors and thread nipper assembly cooperating of reed.A special advantage is arranged like this, and promptly control is very simple.

Fig. 9 represents the situation when weft yarn 38 is introduced.Nozzle 22 is in the position of wefting insertion.Knit reed 8 and be in the position of withdrawal, scissors 15 and thread nipper assembly 16 are in the position of unlatching, and weft yarn is introduced in the yarn-guiding duct 36 of feed carriers 32 by auxiliary device for blowing 17.

After weft yarn 38 is introduced into yarn-guiding duct 36, knit reed 8 according to machine cycles and just turn to and beat big direction, and before the weft yarn of having introduced 38 knitted reed 8 and push to.Because the clamp 46 of thread nipper assembly 16 is to link to each other with knitting reed 8, so clamp 46 just refers to that to folder 45 rotate, weft yarn 38 is sandwiched between dull and stereotyped 47.Result folder refers to 45 clamped 46 elastic force that promotes and overcome spring 49 and deflection, and weft yarn is held (Figure 10).

Weft yarn 38 just is cut off after clamping, and this is because with knitting the cause that the continuous shear blade 52 of reed moves to fixing shear blade 51.So a new weft yarn is arranged to be prepared to introduce.After weft yarn 38 is cut off, weft yarn just by thread nipper assembly 16 with knit reed 8 same moved further.(Figure 11)

After this, knit reed 8 and arrive stop positions, here weft yarn 38 by knit once be driven into before reed 8 is punched in, and the weft yarn tightened by the clearing house of warp thread on, from thread nipper assembly 16, deviate from immediately then.(Figure 12)

And then, knit reed 8 and just forward reset position to.Along with its rotation, clamp 46 is with knitting reed deflection together, folder refer to 45 owing to the effect of the power that is subjected to spring 49 also along with clamp 46 rotates till it abuts against on the stop component 50.46 of clamps are knitted reed 8 together and are continued to move, thereby thread nipper assembly is opened, and prepare wefting insertion (Fig. 5) next time.

So in the described in front loom, weft yarn 38 is introduced in the yarn-guiding duct 36 by the weft inserting apparatus 14 of fixed-site, and in the rotation process of knitting reed 8, carries out and hold, cut off and beat up.Can obtain a series of advantage thus.By the weft inserting apparatus of this fixed-site, more reliable from the weft yarn supply of weft accumulator, and the time interval that is used for nozzle is adjusted to insertion position suitable prolongation is arranged, therefore can introduce the weft yarn of 16 kinds of different colours of as many as and kind.By the holding and knitting being synchronized with the movement of reed, can guarantee faultless beating up of the weft yarn introduced before beating up, the weft yarn end section of stretching out here is shorter, thereby the subsidiary waste material that produces also seldom.

Claims

1. the loom of pneumatic weft insertion, wherein loom has a reed of knitting (8) and a weft yarn guiding device (32), they are interconnected and can rotate between weft inserting apparatus and stop position, and be provided with fixed-site, at least the weft inserting apparatus (14) that has a nozzle (22), being used for a weft yarn (38) introduces in the yarn-guiding duct (36), also be provided with a thread nipper assembly (16) and a scissors (15), here thread nipper assembly is connected with knitting reed, so that the weft yarn of introducing (38) is clamped, and from the insertion position to the stop position, keep synchronous driving with yarn-guiding duct (36), wherein be provided with a scissors (15) in the back of thread nipper assembly (16), so that after weft yarn clamps, it is cut off along the stop direction of knitting reed.

2. according to the loom of claim 1, it is characterized in that be provided with scissors (15) successively along the yarn traffic direction between the outlet of nozzle (22) and yarn-guiding duct (36), thread nipper assembly (16) and guiding are blown into parts (17).

3. according to the loom of claim 1 or 2, it is characterized in that weft inserting apparatus (14) is installed on the frame (1).

4. according to the loom of one of claim 1～3, it is characterized in that, be provided with an operating means (25), so that nozzle (22) is put on the insertion position according to the woven designs program.

5. according to the loom of one of claim 1～4, it is characterized in that weft inserting apparatus (14) is provided with many nozzles (22).

6. according to the loom of claim 5, it is characterized in that nozzle (22) can move and/or up and down round rotating with decussate axis.

7. according to the loom of claim 5 or 6, it is characterized in that the paired and mutual upper and lower settings of nozzle (22) or be provided with in the mode of bunchy.

8. according to the loom of claim 1 or 2, it is characterized in that, thread nipper assembly (16) have a rotating folder refer to (45) with one with knitting the clamp (46) that reed (8) is connected.

9. loom according to Claim 8 is characterized in that, folder refers to that (45) are an object that can rotate round the axle (48) of a fixed-site or the element that rotates around a bending axis.

10. loom according to Claim 8 is characterized in that, is provided with a levelling spring (49) and is used for making folder to refer to be in insertion position, and be used for when rotating weft yarn being produced a confining force, and be provided with a stop component (50) and make folder refer to remain on insertion position.

11. the loom according to claim 1 or 2 is characterized in that, scissors (15) has movably blade (52) of a blade that fixedly installs (51) and, wherein movably blade with knitting reed or a drive unit is connected.

12. the loom according to claim 2 is characterized in that, guiding be blown into parts (17) be fixedly install or with knit reed (8) and be connected.

13. the loom according to claim 12 is characterized in that, guiding is blown into the through hole (42) that parts (17) have a taper, and the width of its maximum is facing to nozzle (22), and weft yarn (38) is provided with an open seam road (43).