Weft yarn head end yarn clamping device for air jet loom

Abstract

The utility model discloses a weft yarn head end clamping device for an air jet loom, which comprises a base, the base is positioned between a main nozzle and the head end of a reed and fixedly mounted on a front upper beam, a yarn supporting plate is mounted on the base, the yarn supporting plate backwards protrudes out of the base, a fixed seat is mounted at the top of the base, a hinged lug is arranged on the fixed seat, and the hinged lug is fixed on the fixed seat. A swing arm is rotatably hinged to the hinge lug seat, the hinge point is located between the two ends of the swing arm, the swing arm is rotated to achieve contact and interference between the pressing wheel and the top of the yarn supporting plate, the second end of the swing arm is connected with the fixing seat through a spring, and the pressing wheel is in tight contact with the top of the yarn supporting plate under the action of the spring. By applying drafting force to the first section of the weft yarn, the weft yarn is tensioned, weft shrinkage is avoided, and the cloth cover of the fabric is smoother and more stable. In addition, the device is simple and compact in structure, space-saving, convenient to install and maintain, low in manufacturing cost and suitable for wide-range popularization and application.

Description

TECHNICAL FIELD

[0001] The utility model relates to air jet loom technical field, specifically, relate to a weft yarn first end yarn clamping device for air jet loom. BACKGROUND

[0002] When weaving double-layer fabric, the just woven weft yarn does not form interlacing, and the interlacing is completed after every other weft yarn, at this time, the weft yarn is in a floating state, in order to constrain the weft yarn, the weft yarn needs to be held tightly on the upper first side of the weft yarn, and draft force is applied to the weft yarn on the lower first side to pull the weft yarn tightly to prevent weft shrinkage, the existing air jet loom presses the weft yarn by the weft stopping pin of the weft accumulator outside the main nozzle, the distance between the weft stopping pin and the cloth edge is too far, the holding force is not enough when weaving double-layer fabric, and the holding force cannot be adjusted, resulting in weft shrinkage.

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

[0004] The utility model discloses a weft yarn first end yarn clamping device for air jet loom, and aims at solving one of the technical problems of the prior art.

[0005] A weft yarn first end yarn clamping device for air jet loom, the device comprises a base, the base is located between the main nozzle and the first end of the reed, and is fixedly installed on the front upper beam, a yarn supporting plate is installed on the base, the yarn supporting plate protrudes backward from the base, a fixing seat is installed on the top of the base, a hinged lug seat is arranged on the fixing seat, a swing arm is rotatably hinged to the hinged lug seat, the hinged point is located between the two end portions of the swing arm, rotating the swing arm can realize that the press wheel contacts and interferes with the top of the yarn supporting plate, and the second end portion of the swing arm is connected with the fixing seat through a spring.

[0006] Preferably, the yarn supporting plate is installed on the base through an adjusting plate, and can be adjusted up and down and forward and backward.

[0007] Preferably, a threaded through hole is arranged on the fixing seat in a penetrating mode, an adjusting bolt is threadedly connected in the threaded through hole, and the spring extends into the threaded through hole and is connected with the adjusting bolt.

[0008] Preferably, a linear actuator is installed on the top of the fixing seat, a second end portion of the swing arm is provided with a fork, and the push rod of the linear actuator is connected with the fork in a clearance fit mode.

[0009] Preferably, the linear actuator is a pneumatic cylinder.

[0010] Preferably, a strip-shaped groove is arranged at the position where the top of the yarn supporting plate contacts the press wheel.

[0011] Preferably, the outer periphery of the presser wheel is provided with an elastic sleeve.

[0012] Compared with the prior art, the utility model has the beneficial effects:

[0013] The utility model relates to a weft yarn head end yarn clamping device for air-jet looms, which applies drafting force to the first section of weft yarn to tighten the weft yarn, avoids weft shrinkage, and makes the fabric surface more flat and stable. In addition, the device has simple and compact structure, saves space, is convenient to install and maintain, has low manufacturing cost, and is suitable for wide range of popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is the front view of the device of the utility model installed on the air-jet loom.

[0016] Figure 2 It is the right view of the device of the utility model installed on the air-jet loom.

[0017] Figure 3 It is the overall structure schematic view of the device of the utility model.

[0018] Figure 4 It is the overall structure sectional view of the device of the utility model.

[0019] In the figure: 1, main nozzle;2, reed;3, base;4, front upper beam;5, adjusting plate;6, yarn supporting plate;7, fixed seat;8, hinged lug seat;9, swing arm;10, presser wheel;11, spring;12, adjusting bolt;13, air cylinder;14, shift fork. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.

[0021] In addition, in the description of the utility model, it should be explained that the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] A preferred embodiment of this utility model provides a weft yarn clamping device for an air-jet loom, such as... Figures 1-2 As shown, the device is installed between the main nozzle 1 of the air-jet loom and the head end of the reed 2 of the air-jet loom.

[0024] like Figures 3-4 As shown, the device includes a base 3, which is fixedly mounted on the front upper beam 4 of the air-jet loom. On the right side of the base 3, near the head end of the reed 2, a yarn-supporting plate 6 is mounted via an adjusting plate 5, and the yarn-supporting plate 6 protrudes rearward from the base 3. Specifically, the yarn-supporting plate 6 has a first elongated mounting hole arranged in the front-to-back direction. A first adjusting bolt passes through the first elongated mounting hole and is threadedly connected to the adjusting plate 5, thus mounting the yarn-supporting plate 6 onto the adjusting plate 5. The adjusting plate 5 has a second elongated mounting hole arranged in the vertical direction. A second adjusting bolt passes through the second elongated mounting hole and is threadedly connected to the base 3, thus mounting the adjusting plate 5 onto the base 3. Based on the above configuration, the front-to-back position of the yarn-supporting plate 6 can be adjusted via the first adjusting bolt, and the vertical position of the adjusting plate 5 can be adjusted via the second adjusting bolt, thereby achieving vertical adjustment of the yarn-supporting plate 6.

[0025] A fixed base 7 is fixedly installed on the top of the base 3. A hinge ear 8 is provided on the rear side of the fixed base 7. A swing arm 9 is rotatably hinged to the hinge ear 8. Specifically, the hinge ear 8 is provided with a first hinge hole. The swing arm 9 is in the shape of a "7" and a second hinge hole is provided at the corner of the swing arm 9. The first hinge hole and the second hinge hole are connected by a pin. A rotating shaft is vertically installed at the first end of the swing arm 9. A pressure roller 10 is rotatably installed on the rotating shaft. When the swing arm 9 rotates about the pin, the pressure roller 10 can contact and interfere with the top of the yarn support plate 6.

[0026] The second end of the swing arm 9 is connected to the fixed base 7 via a spring 11. The elastic force of the spring 11 acts on the swing arm 9, ensuring tight contact between the pressure roller 10 and the top of the yarn support plate 6. Furthermore, a threaded through hole is provided in the fixed base 7, and an adjusting bolt 12 is threaded into the threaded through hole. The spring 11 extends into the threaded through hole and is connected to the adjusting bolt 12. By turning the adjusting bolt 12, the elastic force of the spring 11 can be adjusted, thereby adjusting the clamping force between the pressure roller 10 and the top of the yarn support plate 6.

[0027] The top of the fixed seat 7 is provided with a linear actuator, and the second end of the swing arm 9 is provided with a yoke 14, and the push rod of the cylinder 13 is connected with the yoke 14 in a clearance fit mode. Specifically, the swing arm 9 rotates during the forward extension of the push rod of the cylinder 13, and when the push rod of the cylinder 13 is extended to the appropriate position, the swing arm 9 is rotated to the state that the presser wheel 10 is in contact with the top of the yarn support plate 6, and in this state, the push rod of the cylinder 13 is not connected with the yoke 14, and the purpose is that the swing arm 9 can be slightly rotated during the adjustment of the elastic force of the spring 11 to make the presser wheel 10 tightly contact with the top of the yarn support plate 6, and because the push rod is not connected with the yoke 14, the push rod does not interfere with the slight rotation of the swing arm 9. When the push rod of the cylinder 13 is retracted backward, the swing arm 9 can be reversely rotated to lift the presser wheel 10 from the top of the yarn support plate 6, so that the related operations such as maintenance and repair can be facilitated.

[0028] The working process of the air-jet loom provided with the device is described as follows.

[0029] The pressing force between the presser wheel 10 and the top of the yarn support plate 6 is adjusted as required, the steel reed 2 is swung forward to beat the weft after the weft insertion is completed, and the leading end of the weft is squeezed between the presser wheel 10 and the yarn support plate 6, that is, the presser wheel 10 and the yarn support plate 6 clamp the weft, and at this time, the leading end of the weft has a sustained draft force, which effectively prevents the weft shrinkage. Then, when the steel reed 2 beats the weft for the second time, the new weft is squeezed between the presser wheel 10 and the yarn support plate 6, and at the same time, the previous weft is squeezed out, so that the fabric surface is stable.

[0030] Further, the top of the yarn support plate 6 is provided with a strip-shaped groove at the position in contact with the presser wheel 10, and the outer periphery of the presser wheel 10 is provided with an elastic rubber sleeve, and the elastic rubber sleeve presses the weft in the strip-shaped groove, so as to improve the pressing force on the weft.

[0031] When the short weft occurs during the weaving process, the push rod of the cylinder is retracted backward to lift the presser wheel 10 from the top of the yarn support plate 6, and the automatic weft catching device can draw out the short weft.

[0032] In summary, the weft first end clamping device for the air-jet loom provided by the embodiment of the utility model can apply the draft force on the first section of the weft, tighten the weft, avoid the weft shrinkage, and make the fabric surface more flat and stable. In addition, the device has the advantages of simple and compact structure, space saving, convenient installation and maintenance, low manufacturing cost, and wide application.

[0033] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained 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 part of the 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 first end thread clamping device for an air jet loom, characterized in that, The device comprises a base which is located between the main nozzle and the front end of the reed and is fixedly installed on the front upper beam, a yarn supporting plate is installed on the base, the yarn supporting plate protrudes backward from the base, a fixing seat is installed on the top of the base, a hinged lug seat is arranged on the fixing seat, a swing arm is rotatably hinged on the hinged lug seat, the hinged point is located between the two end portions of the swing arm, the swing arm can be rotated to realize the contact and interference between the pressure roller and the top of the yarn supporting plate, the second end portion of the swing arm is connected with the fixing seat through a spring, and the pressure roller is in close contact with the top of the yarn supporting plate under the action of the spring.

2. A weft thread first end thread gripping device for an air jet loom according to claim 1, characterized in that The yarn supporting plate is installed on the base through an adjusting plate and can be adjusted up and down and forward and backward.

3. A weft thread first end thread gripping device for an air jet loom according to claim 1, characterized in that A threaded through hole is arranged on the fixing seat in a penetrating manner, an adjusting bolt is threadedly connected in the threaded through hole, and the spring is inserted into the threaded through hole and connected with the adjusting bolt.

4. A weft thread first end thread gripping device for an air jet loom according to claim 1, characterized in that A linear actuator is installed on the top of the fixing seat, a yoke is installed on the second end portion of the swing arm, and the push rod of the linear actuator is connected with the yoke in a clearance fit manner.

5. A weft thread first end thread gripping device for an air jet loom according to claim 4, characterized in that The linear actuator is a pneumatic cylinder.

6. A weft thread first end thread gripping device for an air jet loom according to claim 1, wherein A strip-shaped groove is arranged at the position where the top of the yarn supporting plate contacts with the pressure roller.

7. A weft thread first end thread gripping device for an air jet loom according to claim 1, wherein An elastic sleeve is sleeved on the outer periphery of the pressure roller.

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