Positive rewinding and negative yarn feeding coexistence weft yarn tension adjusting device of shuttle loom

Abstract

The invention discloses a positive rewinding and negative yarn feeding coexistence weft yarn tension adjusting device of a shuttle loom, and relates to the technical field of textile machinery. Comprising a shuttle body, a replaceable weft storage device and a tension sensing system, the replaceable weft storage device and the tension sensing system are connected into the shuttle body, open grooves are formed in the two sides of the shuttle body, and a support is arranged in the shuttle body; the tension sensing system comprises a tension sensing spring pressing piece device, a battery, a motor and an electromagnetic clamp, the tension sensing spring pressing piece device is arranged on one side of the open groove, weft yarn on the replaceable weft storage device penetrates through the tension sensing spring pressing piece device, and the battery is electrically connected with the motor. The motor is connected with one end of the electromagnetic clamp, and the other end of the electromagnetic clamp is connected with the replaceable weft storage device. The device has the advantages of simplicity in operation, high automation degree and convenience in weft replacement, solves the problems of fabric hemming, selvage deflection and the like caused by non-uniform weft tension during beating-up, improves the quality of fabric finished products, and improves the processing efficiency of a loom.

Description

Technical Field

[0001] The invention relates to the technical field of textile machinery, in particular to a weft tension regulating device with both positive rewinding and negative yarn feeding for a shuttle loom. Background Art

[0002] In the textile field, the unwinding tension of the weft yarn during the weaving process of traditional shuttle looms is directly related to the quality of the finished product and the smooth progress of subsequent processing. Reasonable and stable weft yarn tension can improve the production efficiency of the weaving workshop.

[0003] However, the current shuttle loom weft insertion method is a passive output of the weft yarn, relying on the back-and-forth pulling force of the weft delivery mechanism (i.e., the shuttle) and the friction between the warp and weft yarns to pull back the weft, which will cause the weft insertion tension to be unstable and uncontrollable. Traditionally, the shuttle box uses a small elasticity of the built-in tension spring to adjust the tension, and the weft yarn adjustment length or tension adjustment range is very limited. Essentially, this is because the shuttle of the existing shuttle loom cannot adjust the length of the weft yarn delivered in real time according to the weft yarn tension during weaving. Therefore, during the weaving process, the warp yarn is often pulled tight due to the weft yarn delivery length being too short or the tension being too high, which then causes the weft yarn to be broken or the finished fabric edge to be twisted and curled, or the longer weft yarn segment that is not involved in the interweaving is relaxed during the reciprocating weft insertion process, causing the weft segment to be tangled, resulting in large fluctuations in the weft tension, weaving difficulties, and even poor forming. Therefore, it is necessary to improve the existing traditional shuttle so that the passive output of the weft yarn and the active rewinding can work together.

[0004] To this end, an improved method for the shuttle tension problem of the above-mentioned shuttle loom was designed. The patent document with application number 202010943017.6 discloses a closed-loop controlled automated weft insertion method, which specifically includes a passive weft delivery mode and an active weft delivery mode. During passive weft delivery, the weft insertion is only performed by the normal reciprocating motion of the shuttle body to pull the yarn of the weft tube. After the weft insertion is completed, the tension detection unit detects whether the weft tension meets the preset tension, and the logic unit controls the motor rotation according to the detection result. During active weft delivery, the weft insertion is controlled by the normal reciprocating motion of the shuttle body and the logic control unit to control the motor to release the yarn. After the weft insertion is completed, the tension detection unit detects whether the weft tension meets the preset tension, and the logic unit controls the motor rotation according to the detection result. This method can achieve automated control of weft delivery, but controlling the motor after weft insertion doesn't address the technical challenge of loosening and kinking the weft yarn from the exit point to the selvedge during weft insertion. Furthermore, the device's multiple control modules are integrated into the shuttle body, making the shuttle excessively large and even occupying the limited space in the shuttle box where the weft tube is placed, reducing the relative weft storage capacity. Using this device to retrofit an existing loom is not only complex and expensive, but also requires an extremely high shed opening height, placing high demands on warp yarn strength or tensile deformation that exceed the mechanical properties of normal yarns, making it difficult to achieve. In addition, patent application number 202410799467.0 discloses a weft roller device and weft insertion method controlled by an external motor. Two sets of rapier support blocks are installed on both sides of the rear part of the shuttle body. The weft insertion support rapier is clamped in the rapier support block on the shuttle body and driven by the weft insertion drive module to drive the shuttle body forward to realize the weft insertion action. This device moves the drive control part of the weft roller to the outside of the shuttle body, solving the problem of the overall size of the shuttle being too large. This device requires that the distance between the two sets of rapiers is less than the length of the shuttle body, and does not solve the tension fluctuation problem caused by the release length of the weft yarn in the shuttle. In short, the existing technology for improving shuttle tension cannot effectively solve the problem of weft tension fluctuation and is difficult to apply to existing shuttle looms.

[0005] There is an urgent need to propose a weft tension adjustment device for a shuttle loom that can automatically adjust the weft delivery / receiving amount in real time according to the actual weft tension, and has both positive rewinding and negative yarn delivery. Summary of the Invention

[0006] The main purpose of the present invention is to provide a weft tension adjustment device with both active rewinding and passive yarn feeding for a shuttle loom. By real-time sensing and adjusting the weft tension, the present invention solves the problems of low automation level of weft unwinding in existing shuttle looms, uneven weft tension during weaving, and weft yarn being easily loosened or tightened, which in turn leads to weft yarn kinking or twisted / skewed cloth edges.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A weft tension adjustment device for a shuttle loom with both positive rewinding and negative yarn feeding comprises a shuttle body, a replaceable weft storage device, and a tension sensing system. The replaceable weft storage device and the tension sensing system are connected to the interior of the shuttle body. Slots are provided on both sides of the shuttle body, and a bracket is provided inside the shuttle body.

[0009] The tension sensing system includes a tension sensing spring pressure piece device, a battery, a motor and an electromagnetic clamp arranged inside the shuttle body. The tension sensing spring pressure piece device is arranged on one side of the slot. The weft yarn on the replaceable weft storage device passes through the tension sensing spring pressure piece device. The battery is electrically connected to the motor. When working, the motor is connected to the electromagnetic clamp, and the electromagnetic clamp is connected to the replaceable weft storage device.

[0010] Furthermore, the tension-sensing spring pressure sheet device includes a spring sheet and a conductive clip, the spring sheet is connected to the inside of the slot, the conductive clip is connected to the inner wall of the shuttle body, the end of the spring sheet is provided with a weft yarn conveying path, and the inner side of the spring sheet is provided with a conductive sheet, and the conductive sheet is adapted to the conductive clip.

[0011] Furthermore, the shuttle body is a box-shaped structure as a whole.

[0012] Furthermore, the replaceable weft storage device includes a yarn tube and a tube shaft, the yarn tube is sleeved on the tube shaft, and both ends of the yarn tube are provided with a thread blocking portion.

[0013] Furthermore, the wire blocking portion is disc-shaped.

[0014] Furthermore, the yarn tube is a smooth hollow cylinder, the tube shaft is a smooth cylinder, and the yarn tube and the tube shaft are sleeved and fixed.

[0015] Furthermore, a bobbin slot is provided at one end of the shuttle body, and the bobbin slot cooperates with the bracket to install a replaceable weft storage device.

[0016] Furthermore, a bearing is provided in the slot of the bobbin.

[0017] Furthermore, the device operation has an automatic control process, which includes controlling the positive rewinding and negative yarn feeding of the entire device;

[0018] When the weft yarn unwinding tension is too low, it will be actively rewound. The spring piece is in the initial state, the conductive piece contacts the conductive clamp and forms a closed circuit. The electromagnetic clamp is energized and clamps the tube shaft and the motor. The motor, electromagnetic clamp and tube shaft rotate as a whole under the drive of the motor, and the weft yarn is rewound onto the bobbin.

[0019] When the unwinding tension of the weft yarn is too large, it is a negative yarn feeding, that is, the weft yarn exerts an outward force on the spring sheet, the conductive sheet on the spring sheet separates from the conductive clamp on the inner wall of the shuttle, the circuit is broken, the electromagnetic clamp is loosened, and the bobbin as an independent part rotates alone under the drive of the weft yarn, and the weft yarn is unwound.

[0020] Furthermore, an upper weft yarn conveying path hole and a lower weft yarn conveying path hole are respectively provided on the upper and lower sides of the slot, and the weft yarn on the replaceable weft storage device passes through the upper weft yarn conveying path hole and the lower weft yarn conveying path hole.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Through the tension sensing system, the weft yarn tension is controlled in real time, achieving the effect of uniform weft yarn tension during the weaving process. The device has a high degree of automation and is easy to change weft yarn, which improves the working efficiency of the loom and the quality of the finished product.

[0023] Real-time sensing and adjustment of weft yarn tension solves the problems of low automation of weft unwinding on existing shuttle looms, uneven weft tension during weaving, and weft yarn being easily loosened or tightened, resulting in weft yarn kinking or twisted / skewed fabric edges. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic diagram of the overall structure of a weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom.

[0025] Figure 2 The present invention is another overall structural schematic diagram of a weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom.

[0026] Figure 3 The present invention is a structural schematic diagram of a weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom, including a battery, a motor, an electromagnetic clamp, a bobbin, and a bobbin shaft.

[0027] Figure 4 The present invention is a structural schematic diagram of a tension-sensing spring pressing piece device of a weft tension regulating device with both positive rewinding and negative yarn feeding for a shuttle loom.

[0028] Figure 5 The present invention is another structural schematic diagram of a tension-sensing spring pressing piece device of a weft tension regulating device with both positive yarn rewinding and negative yarn feeding of a shuttle loom.

[0029] Figure 6 The present invention is a schematic diagram of the electrical connections between a battery, a motor, and an electromagnetic clamp in a weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom.

[0030] Among them, 1- shuttle body; 2- replaceable weft storage device; 3- tension sensing system; 4- tension sensing spring pressure device; 5- battery; 6- motor; 7- electromagnetic clamp; 8- yarn tube; 9- slot; 10- yarn tube slot; 11- upper weft yarn conveying path hole, 12- spring sheet; 13- lower weft yarn conveying path hole; 14- weft yarn conveying path; 15- conductive sheet; 16- conductive clamp; 17- tube shaft; 18- bracket. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] Combine Figures 1-6 The present invention provides a weft tension adjustment device with both active rewinding and passive yarn feeding for a shuttle loom, comprising a shuttle body 1, a replaceable weft storage device 2 and a tension sensing system 3, wherein the replaceable weft storage device 2 and the tension sensing system 3 are connected to the inside of the shuttle body 1, slots 9 are provided on both sides of the shuttle body, and a bracket 18 is provided inside the shuttle body 1; the tension sensing system 3 comprises a tension sensing spring pressing piece device 4, a battery 5, a motor 6 and an electromagnetic clamp 7 arranged inside the shuttle body 1, the tension sensing spring pressing piece device 4 is arranged on one side of the slot 9, the weft yarn on the replaceable weft storage device 2 passes through the tension sensing spring pressing piece device 4, the battery 5 is electrically connected to the motor 6, and the motor 6 is connected to one end of the electromagnetic clamp 7 when working, and the other end of the electromagnetic clamp 7 is connected to the replaceable weft storage device 2.

[0034] The tension-sensing spring pressure piece device 4 includes a spring piece 12 and a conductive clip 16. The spring piece 12 is connected to the inside of the slot 9, and the conductive clip 16 is connected to the inner wall of the shuttle body 1. The end of the spring piece 12 is provided with a weft yarn conveying path 14, and the weft yarn on the replaceable weft storage device 2 passes through the weft yarn conveying path 14 inside the spring piece 12, and a conductive piece 15 is provided on the inner side of the spring piece 12, and the conductive piece 15 is adapted to the conductive clip 16; the circuit switch composed of the spring piece 12 and the conductive clip 16 on the inner wall of the shuttle body 1, the raised conductive piece 15 on the inner side of the spring piece 12 serves as part of the circuit.

[0035] The shuttle body 1 is a box-shaped structure as a whole. The shuttle is made of tough material and has good impact resistance.

[0036] The replaceable weft storage device 2 includes a yarn tube 8 and a tube shaft 17. The yarn tube 8 is sleeved on the tube shaft 17. Both ends of the yarn tube 8 are provided with a wire stop portion; the wire stop portion is disc-shaped, which can prevent the weft yarn from falling off the tube when unwinding; the yarn tube 8 is a smooth hollow cylinder, and the weft yarn can be wound onto the surface of the cylindrical yarn tube 8 in any way. The tube shaft 17 is a smooth cylinder, and the yarn tube 8 is sleeved and fixed to the tube shaft 17.

[0037] A bobbin slot 10 is provided at one end of the shuttle body 1, and the bobbin slot 10 cooperates with the bracket 18 to install a replaceable weft storage device 2; as an optimization, a bearing is provided in the bobbin slot 10 for fixing the tube shaft 17 and reducing the wear of the tube shaft 17.

[0038] An upper weft yarn conveying path hole 11 and a lower weft yarn conveying path hole 13 are respectively provided on the upper and lower sides of the slot 9, and the weft yarn on the replaceable weft storage device 2 passes through the upper weft yarn conveying path hole 11 and the lower weft yarn conveying path hole 13; during actual installation, the tube shaft 17 is sequentially passed through the bearing of the tube shaft slot 10, the yarn tube 8, the bearing of the bracket 18, and the electromagnetic clamp 7; when the device is actually running, the weft yarn on the replaceable weft storage device (2) passes through the upper weft yarn conveying path hole 11, the weft yarn conveying path (14) on the spring sheet 12, and the lower weft yarn conveying path hole 13.

[0039] When the weft tension is too large, the spring piece 12 is tightened; when the weft tension is too small, the spring piece 12 is in the initial state; the device operation has an automatic control process, which includes controlling the active rewinding and passive yarn feeding of the entire device.

[0040] When the weft unwinding tension is too low, active rewinding occurs. That is, when the spring 12 is in its initial state, the conductive sheet 15 contacts the conductive clamp 16, forming a closed circuit. The electromagnetic clamp 7 is energized and clamps the tube 17 and the motor 6. Driven by the motor 6, the motor 6, the electromagnetic clamp 7, and the tube 17 rotate as a whole, and the weft yarn is rewound onto the bobbin 8. When the weft unwinding tension is too high, passive yarn feeding occurs. The weft yarn exerts an outward force on the spring 12, separating the conductive sheet 15 on the spring 12 from the conductive clamp 16 on the inner wall of the shuttle body 1. This disconnects the circuit, releases the electromagnetic clamp 7, and the bobbin 8 rotates independently, driven by the weft yarn, and the weft yarn is unwound. Active rewinding and passive yarn feeding operate alternately, thereby controlling the unwinding length and tension of the weft yarn.

[0041] The specific working conditions are as follows:

[0042] When the weft yarn on the bobbin 8 is tightened, the spring piece 12 is pulled tight, and the conductive piece 15 on the spring piece 12 is separated from the conductive clip 16 on the left inner wall of the shuttle body 1, the circuit of the tension sensing system 3 is disconnected, and the replaceable weft storage device 2 is passively rotated under the action of the weft yarn tension, thereby unwinding the weft yarn on the replaceable weft storage device 2; when the weft yarn tension is small, the spring piece 12 returns to its initial state, and the conductive piece 15 on the spring piece 12 contacts the conductive clip 16 on the left inner wall of the shuttle body 1 to form a closed loop, the circuit of the tension sensing system 3 is energized, and the electromagnetic clamp 7 clamps the motor 6 and the tube shaft 17 at the same time, and the power output end of the motor 6 rotates together with the tube shaft 17 and the bobbin 8, thereby rewinding the weft yarn on the replaceable weft storage device 2.

[0043] The tension sensing system 3 is controlled by the weft yarn on the replaceable weft storage device 2. When the weft yarn is tightened, the spring plate 12 is pulled tight, and the conductive plate 15 on the spring plate 12 separates from the conductive clip 16 on the left inner wall of the shuttle. The circuit of the tension sensing system 3 is disconnected, and the replaceable weft storage device 2 passively rotates under the action of the weft yarn tension, thereby unwinding the weft yarn on the replaceable weft storage device 2. When the weft yarn tension is low, the spring plate 12 returns to its initial state, and the conductive plate 15 on the spring plate 12 contacts the conductive clip on the left inner wall of the shuttle, forming a closed circuit. The circuit of the tension sensing system 3 is energized, and the electromagnetic clamp 7 simultaneously clamps the motor 6 and the shaft 17, rotating together with the motor 6, thereby rewinding the weft yarn on the replaceable weft storage device 2.

[0044] The present invention has the advantages of simple operation, high degree of automation and convenient weft yarn replacement, solves the problems of fabric curling and skewed edges caused by uneven weft yarn tension during beating, improves the quality of finished fabrics and improves the processing efficiency of the loom.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom, characterized in that: The invention comprises a shuttle body (1), a replaceable weft storage device (2) and a tension sensing system (3), wherein the replaceable weft storage device (2) and the tension sensing system (3) are connected to the interior of the shuttle body (1), slots (9) are provided on both sides of the shuttle body, and a bracket (18) is provided inside the shuttle body (1); The tension sensing system (3) comprises a tension sensing spring pressing piece device (4), a battery (5), a motor (6) and an electromagnetic clamp (7) arranged inside the shuttle body (1); the tension sensing spring pressing piece device (4) is arranged on one side of the slot (9); the weft yarn on the replaceable weft storage device (2) passes through the tension sensing spring pressing piece device (4); the battery (5) is electrically connected to the motor (6); the motor (6) is connected to one end of the electromagnetic clamp (7); and the other end of the electromagnetic clamp (7) is connected to the replaceable weft storage device (2).

2. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom as claimed in claim 1, characterized in that: The tension-sensing spring pressing device (4) comprises a spring sheet (12) and a conductive clip (16), wherein the spring sheet (12) is connected to the inside of the slot (9), and the conductive clip (16) is connected to the inner wall of the shuttle body (1), a weft yarn conveying path (14) is provided at the end of the spring sheet (12), and a conductive sheet (15) is provided on the inner side of the spring sheet (12), and the conductive sheet (15) is adapted to the conductive clip (16).

3. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom as claimed in claim 1, characterized in that: The shuttle body (1) is a box-shaped structure as a whole.

4. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom as claimed in claim 2, characterized in that: The replaceable weft storage device (2) comprises a yarn tube (8) and a tube shaft (17), wherein the yarn tube (8) is sleeved on the tube shaft (17), and both ends of the yarn tube (8) are provided with a thread blocking portion.

5. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom as claimed in claim 4, characterized in that: The wire blocking portion is in a disc shape.

6. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom as claimed in claim 4, characterized in that: The yarn tube (8) is a smooth hollow cylinder, the tube shaft (17) is a smooth cylinder, and the yarn tube (8) and the tube shaft (17) are sleeved and fixed.

7. A weft tension adjustment device with both positive rewinding and negative yarn feeding for a shuttle loom as claimed in claim 1, characterized in that: One end of the shuttle body (1) is provided with a bobbin slot (10), and the bobbin slot (10) cooperates with the bracket (18) to install a replaceable weft storage device (2).

8. A weft tension adjustment device with both positive yarn rewinding and negative yarn feeding for a shuttle loom as claimed in claim 7, characterized in that: A bearing is arranged in the bobbin slot (10).

9. A weft tension adjustment device with both positive yarn rewinding and negative yarn feeding for a shuttle loom as claimed in claim 4, characterized in that: The device has an automatic control process for operation, which includes controlling the positive rewinding and negative yarn feeding of the entire device; When the weft yarn unwinding tension is too low, the weft yarn is actively rewound, the spring sheet (12) is in the initial state, the conductive sheet (15) contacts the conductive clamp (16) and forms a closed circuit, the electromagnetic clamp (7) is energized and clamps the tube shaft (17) and the motor (6), the motor (6), the electromagnetic clamp (7) and the tube shaft (17) rotate as a whole under the drive of the motor (6), and the weft yarn is rewound onto the bobbin (8); When the unwinding tension of the weft yarn is too large, the yarn is fed in a negative manner, that is, the weft yarn exerts an outward force on the spring sheet (12), the conductive sheet (15) on the spring sheet (12) is separated from the conductive clamp (16) on the inner wall of the shuttle body (1), the circuit is disconnected, the electromagnetic clamp (7) is released, and the yarn tube (8) rotates independently as an independent part driven by the weft yarn, and the weft yarn is unwound.

10. A weft tension adjustment device with both positive yarn rewinding and negative yarn feeding for a shuttle loom as claimed in claim 1, characterized in that: An upper weft yarn conveying path hole (11) and a lower weft yarn conveying path hole (13) are respectively provided on the upper and lower sides of the slot (9), and the weft yarn on the replaceable weft storage device (2) passes through the upper weft yarn conveying path hole (11) and the lower weft yarn conveying path hole (13).

Images