Weft yarn end drafting device for air jet loom

By installing a weft yarn end drafting device on an air-jet loom, and using components such as a weft detector, drafting valve body, and yarn hook plate to apply drafting force to the tail section of the weft yarn, the problem of weft yarn springback is solved, fabric quality is improved, and costs are reduced.

CN223468499UActive Publication Date: 2025-10-24QINGDAO TIANYI GROUP RED FLAG TEXTILE MACHINERY
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Patent Information

Application Number
CN202422947181.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-10-24
Estimated Expiration
2034-11-29

AI Technical Summary

Technical Problem

When an air-jet loom weaves a smooth, thick fabric, the weft yarns tend to spring back, causing weft shrinkage and affecting fabric quality.

Method used

Install a weft yarn end drafting device on an air-jet loom. By applying drafting force to the tail of the weft yarn, and using components such as a weft detector, drafting valve body, yarn hooking plate and yarn blowing tube, the weft yarn is continuously pulled and hooked to prevent rebound.

Benefits of technology

It effectively prevents weft yarn rebound, improves fabric quality, and has a simple and compact structure that saves space, is easy to install and maintain, and has low cost, making it suitable for a wide range of applications.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a weft yarn end drafting device for an air jet loom, which is characterized in that a drafting valve body is arranged at the tail end of a reed, and a weft feeler is arranged between the reed and the drafting valve body; the drafting valve body is provided with a drafting reed groove, the weft feeler is provided with a weft feeler reed groove, one end of the weft feeler reed groove is in butt joint with the air flow groove in the reed, and the other end of the weft feeler reed groove is in butt joint with the drafting reed groove. An air guide pipe is arranged on the drafting valve body, the inner opening end of the air guide pipe is located on the inner wall of the drafting reed groove, a first air nozzle and a second air nozzle are further formed in the inner wall of the drafting reed groove, the first air nozzle is used for blowing the tail section of weft into the air guide pipe and making the weft have continuous drafting force, and the second air nozzle is used for blowing the tail section of the weft out of the drafting reed groove; an open groove is formed in the drafting valve body, and a yarn hooking plate is installed in front of the open groove. The device applies drafting force to the tail section of the weft yarn to tension the weft yarn, so that the problem of resilience of the elastic weft yarn is solved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to air jet loom weft insertion technical field, concretely, it is a kind of weft yarn end draft device for air jet loom. BACKGROUND

[0002] The weft insertion of air jet loom is to use air as weft insertion medium, and the compressed air jet is used to generate friction traction on weft yarn, so as to take weft yarn through shed, usually the flight trajectory of weft yarn is from the left side of air jet loom, and the weft yarn is taken to the right side of loom, and then the weft yarn is beaten up. When the existing air jet loom weaves the thick fabric with smooth surface, the weft yarn is very easy to rebound after reaching the right side, that is, weft shrinkage occurs, which seriously affects the quality of fabric.

[0003] Therefore, it is necessary to improve the prior art. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of weft yarn end draft devices for air jet loom, and the purpose is to provide a kind of weft yarn end draft device for air jet loom, to at least solve one of the technical problems of the prior art, to achieve the above-mentioned purpose, the technical solutions adopted as follows:

[0005] A kind of weft yarn end draft device for air jet loom, the tail end position of reed of air jet loom is equipped with draft valve body, draft valve body and reed are equipped with weft detector between, when reed swings, weft detector and draft valve body are all synchronous swing with reed;

[0006] Draft valve body is provided with draft reed groove, and draft reed groove slot is forward, weft detector is provided with weft reed groove, and one end of weft reed groove is connected with airflow groove on reed, and the other end is connected with draft reed groove;

[0007] Draft valve body is inserted with air guide pipe, and the inner mouth end of air guide pipe is located in the inner wall of draft reed groove, and the inner wall of draft reed groove is further provided with first air jet and second air jet, first air jet is used to blow into air guide pipe with the tail section of weft yarn and make the tail section of weft yarn have sustained draft force, and second air jet is used to blow out the tail section of weft yarn from draft reed groove;

[0008] Draft valve body is provided with opening slot on the section between the first end of draft reed groove and the inner mouth end of air guide pipe, and opening slot is forward, and is arranged with draft reed groove, and hooking plate is installed in the front of opening slot, when reed swings to the most forward end and beats up, hooking plate is located in opening slot, avoids interference beating up, and can hook weft yarn simultaneously.

[0009] Preferably, reed, weft detector and draft valve body are closely connected between adjacent, and are fixedly installed on reed seat of air jet loom respectively.

[0010] Preferably, the inner end of the air duct is located at the top of the inner wall of the drawing reed groove, the first air jet is located at the bottom of the inner wall of the drawing reed groove, and is arranged opposite to the inner end of the air duct.

[0011] Preferably, the second air jet is located at the back of the inner wall of the drawing reed groove.

[0012] Preferably, the first air jet is connected with the air source and is provided with a first electromagnetic valve for controlling the on-off of the first air jet.

[0013] Preferably, the second air jet is connected with the air source and is provided with a second electromagnetic valve for controlling the on-off of the second air jet.

[0014] Preferably, the entrance end of the drawing reed groove in the opening groove is flared.

[0015] Preferably, the hooking plate is installed on the front upper beam of the air-jet loom through a support, and the position of the hooking plate can be adjusted in the front-back direction and the left-right direction.

[0016] Preferably, a downward inclined slope is arranged on the top of the hooking plate from front to back, a hook groove with a front opening is arranged at the top end position of the slope, and the weft yarn slides forward along the slope during the forward swinging of the reed and can fall into the hook groove.

[0017] Preferably, a blowing pipe is arranged above the hooking plate, the blowing pipe is connected with the air source and is provided with a third electromagnetic valve for controlling the on-off, and the tail end of the weft yarn is blown to the front of the weaving mouth of the air-jet loom through the blowing pipe after beating-up is completed.

[0018] Compared with the prior art, the present utility model has the following beneficial effects:

[0019] The weft yarn end drawing device for the air-jet loom of the present utility model tightens the weft yarn by applying a drawing force on the tail end of the weft yarn, avoids weft shrinkage, and solves the problem of elastic weft yarn rebound. In addition, the device has a simple and compact structure, saves space, is convenient to install and maintain, has a low manufacturing cost, and is suitable for wide range of popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the present utility model, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following only represent some embodiments of the present utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0021] Figure 1 is the front view of the device of the present utility model installed on the air-jet loom.

[0022] Figure 2It is the utility model device installs on the air-jet loom left and right direction side view.

[0023] Figure 3 It is the utility model draft valve body structure schematic diagram.

[0024] Figure 4 It is the utility model draft valve body assembly schematic diagram.

[0025] In the figure: 1, the weft detector, 2, draft valve body, 3, the yarn hooking plate, 4, the yarn blowing pipe, 5, the reed, 6, the reed seat, 7, the draft reed slot, 8, the weft detector reed slot, 9, the airflow slot, 10, the air guide pipe, 11, the first air jet, 12, the first electromagnetic valve, 13, the second air jet, 14, the second electromagnetic valve, 15, the opening slot, 16, the flared, 17, the support, 18, the front upper beam, 19, the yarn hooking support, 20, the hooking slot, 21, the yarn pipe support. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model.

[0027] In the description of the utility model, it is necessary to explain that unless another explicit provision and limitation, the terms "installation", "connection", "connection", "fixing" should be broad sense understanding, for example, can be fixed connection, or can be detachable connection, or integrally connected, can be mechanical connection, can be directly connected, or indirectly connected through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0028] The preferred embodiment of the utility model provides a weft yarn end draft device for air-jet loom, the device includes: weft detector 1, draft valve body 2, yarn hooking plate 3 and yarn blowing pipe 4.

[0029] As Figures 1-2 Shown, the existing air-jet loom reed 5 fixedly installed on the reed seat 6, from left to right, weft insertion is carried out, draft valve body 2 is located at the tail end of reed 5, that is, right side position, and is fixedly installed on reed seat 6, and reed 5 and draft valve body 2 are provided with weft detector 1, similarly, weft detector 1 is also fixedly installed on reed seat 6, and reed 5, weft detector 1 and draft valve body 2 are closely butted between the three adjacent. Based on the above setting, when reed seat 6 drives reed 5 to swing back and forth, weft detector 1 and draft valve body 2 are swung synchronously with reed 5.

[0030] As Figures 3-4As shown, the draft valve body 2 is provided with a draft reed groove 7 along the left-right direction, and the draft reed groove 7 is open to the front. The weft detector 1 is provided with a weft detector reed groove 8 along the left-right direction, and the weft detector reed groove 8 is open to the front. The left end of the weft detector reed groove 8 is connected to the air flow groove 9 on the reed 5, and the right end is connected to the draft reed groove 7. Thus, the air flow groove 9, the weft detector reed groove 8 and the draft reed groove 7 form a linear reed groove along the left-right direction.

[0031] The draft valve body 2 is provided with an air guide pipe 10 from the top. The inner opening end of the air guide pipe 10 is located in the inner wall of the draft reed groove 7, specifically, the top, that is, the upper side wall. At the bottom, that is, the lower side wall of the inner wall of the draft reed groove 7, further, below the inner opening end of the air guide pipe 10, a first air outlet 11 is provided. The first air outlet 11 is connected to the air source and is provided with a first electromagnetic valve 12 for controlling the opening and closing of the first air outlet 11.

[0032] Further, at the rear, that is, the rear side wall of the inner wall of the draft reed groove 7, further, to the left of the first air outlet 11, a second air outlet 13 is provided. The second air outlet 13 is connected to the air source and is provided with a second electromagnetic valve 14 for controlling the opening and closing of the second air outlet 13.

[0033] Further, on the draft valve body 2, specifically, to the left of the second air outlet 13, an opening groove 15 is provided. The opening groove 15 is arranged transversely to the draft reed groove 7 and penetrates the draft valve body 2 along the front-rear direction.

[0034] Further, the entrance end of the draft reed groove 7 in the opening groove 15 is flared 16, which facilitates the smooth entry of the weft yarn into the right draft reed 7 groove when passing through the opening groove 15.

[0035] A weft hooking plate 3 is provided in front of the opening groove 15. Specifically, the weft hooking plate 3 is installed on the front upper beam 18 of the air jet loom through a support 17. Further, the weft hooking plate 3 is connected to the support 17 through a yarn hook support 19, which can realize the up-down and front-back adjustment of the weft hooking plate 3. A downward inclined slope is provided on the top of the weft hooking plate 3 from front to back. A hook groove 20 is provided at the top end of the slope, which is open to the front.

[0036] A yarn blowing pipe 4 is provided above the weft hooking plate 3. The yarn blowing pipe 4 is connected to the air source and is provided with a third electromagnetic valve (not shown in the figure) for controlling the opening and closing. Further, the yarn blowing pipe 4 is connected to the support 17 through a yarn pipe support 21, which can realize the adjustment of the blowing direction of the yarn blowing pipe 4.

[0037] The weft insertion process of the air jet loom equipped with the device of the embodiment is described as follows:

[0038] Under the action of the airflow, the weft yarn flies along the airflow groove 9 on the reed 5 from left to right, when the weft yarn end enters the weft detecting reed groove 8, the weft detector 1 detects the weft yarn, at this time, the first electromagnetic valve 12 opens, the first air jet 11 sprays air into the air guide pipe 10, the weft yarn continues to fly to the right, when entering the drafting reed groove 7, the first air jet 11 blows the tail section of the weft yarn into the air guide pipe 10, and the first air jet 11 continuously sprays air to make the weft yarn have continuous drafting force.

[0039] Then the reed seat 6 drives the reed 5 to swing forward to beat the weft, in the process of swinging forward, the weft yarn slides forward along the slope on the hooking plate 3 and can fall into the hook groove 20, at the same time, the hooking plate 3 gradually extends into the opening groove 15, the purpose of setting the opening groove 15 is to avoid the interference of the hooking plate 3 with beating the weft, after beating the weft, the first electromagnetic valve 12 is closed, at this time, the tail end of the weft yarn is still in the air guide pipe 10.

[0040] Then the reed seat 6 drives the reed 5 to swing back, in the process of swinging back, the hook groove 20 always hooks the weft yarn, when swinging back to the initial position, because the forward and backward distance of beating the weft is less than the length of the weft yarn in the air guide pipe 10, so there is a small section of the weft yarn in the air guide pipe 10, at this time, the second electromagnetic valve 14 opens, the second air jet 13 sprays air to blow the weft yarn out of the air guide pipe 10 and also out of the drafting reed groove 7, after a certain time, the second electromagnetic valve 14 is closed.

[0041] Finally, the third electromagnetic valve opens, the air jet of the blowing pipe 4 sprays air, the function is to blow the weft yarn end to the front of the air jet loom weaving mouth and close to the weft yarn woven in front, to prevent the air flow driven by the reed 5 moving back to take the yarn head to the back, after a certain time, the third electromagnetic valve is closed.

[0042] In summary, the weft yarn end drafting device for the air jet loom described in the embodiment of the utility model, by applying drafting force to the tail section of the weft yarn, the weft yarn is tightened, the weft shrinkage is avoided, and the problem of elastic weft yarn rebound is solved.

[0043] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A weft thread end drafting device for an air jet loom, characterized in that, The draft valve body is installed at the tail end position of the reed of the air jet loom, and the weft detector is installed between the reed and the draft valve body, and the weft detector and the draft valve body are synchronously swung with the reed when the reed swings. The draft reed groove is provided on the draft valve body, and the draft reed groove is open forwardly, and the weft detector is provided with a weft detector reed groove, one end of the weft detector reed groove is connected with the air flow groove on the reed, and the other end is connected with the draft reed groove. The draft valve body is provided with a guide pipe in the form of insertion, and the inner end of the guide pipe is located in the inner wall of the draft reed groove, and the inner wall of the draft reed groove is further provided with a first air jet port and a second air jet port, the first air jet port is used for blowing the weft tail into the guide pipe and making the weft have continuous draft force, and the second air jet port is used for blowing the weft tail out of the draft reed groove. The draft valve body is provided with an opening groove on the section between the first end of the draft reed groove and the inner end of the guide pipe, the opening groove is open forwardly, and the opening groove is arranged crosswise with the draft reed groove, and a weft hooking plate is installed in front of the opening groove, when the reed swings forwardly to the most forward end to beat the weft, the weft hooking plate is located in the opening groove, avoiding interference with beating the weft, and the weft hooking plate can hook the weft.

2. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that The reed, the weft detector and the draft valve body are tightly connected between adjacent ones, and are fixedly installed on the reed seat of the air jet loom.

3. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that The inner end of the guide pipe is located at the top of the inner wall of the draft reed groove, the first air jet port is located at the bottom of the inner wall of the draft reed groove, and is arranged opposite to the inner end of the guide pipe.

4. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that The second air jet port is located at the rear part of the inner wall of the draft reed groove.

5. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that, The first air jet port is connected with the air source, and is provided with a first electromagnetic valve for controlling the on-off of the first air jet port.

6. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that The second air jet port is connected with the air source, and is provided with a second electromagnetic valve for controlling the on-off of the second air jet port.

7. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that, The entrance end of the draft reed groove in the opening groove is in the form of flared.

8. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that, The weft hooking plate is installed on the front upper beam of the air jet loom through a support, and the position of the weft hooking plate can be adjusted in the front-rear direction and the left-right direction.

9. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that, The top of the weft hooking plate is provided with a downwardly inclined slope from front to back, and a hook groove is provided at the top end of the slope, the weft slides forwardly along the slope during the forward swinging of the reed, and can fall into the hook groove.

10. A weft thread end drafting device for an air jet loom according to claim 1, characterized in that, A weft blowing pipe is provided above the weft hooking plate, the weft blowing pipe is connected with the air source, and is provided with a third electromagnetic valve for controlling the on-off, and the weft tail is blown to the front of the weaving mouth of the air jet loom through the weft blowing pipe after beating the weft.