Adjustable twisting mechanism of twisting machine

Abstract

The utility model belongs to the technical field of textile, and particularly relates to an adjustable twisting mechanism of a twisting machine, which comprises a base, a first fixing block, a first motor, a first electric hydraulic rod, a second electric hydraulic rod, a second fixing block and a second motor. The first fixing block, the first electric hydraulic rod, the second electric hydraulic rod and the second fixing block are all fixedly connected with the upper side of the base, the first fixing block, the first electric hydraulic rod, the second electric hydraulic rod and the second fixing block are sequentially arranged at the upper end of the base, and the upper end of the first fixing block is in bolted connection with the first motor. Through mutual cooperation of the twisting adjusting assembly and the winding adjusting assembly, thread raw materials can be twisted, meanwhile, the twisting length can be adjusted, the twisted threads are wound after twisting is completed, the tightening degree during winding is adjusted, operation is easy, the production efficiency is improved, meanwhile, the production cost is reduced, and the production efficiency is improved. And the influence on the twisting quality is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of textiles, in particular to an adjustable twisting mechanism of a twisting machine. Background Art

[0002] A twisting machine is a textile machinery equipment that twists multiple strands of fine yarn into one strand. Its function is to combine the yarns and use them for linear products or knitting yarns. It is widely used in the yarn processing industry and the textile machinery industry. In the existing technology, when small-scale batches need to be converted and the twisted yarn length needs to be adjusted for a long time, it is necessary to manually stack the yarns repeatedly within a certain effective length and then twist and knead them to make them thicker. The manual processing method is difficult to control the length during the repeated stacking process, and the twisting results are inconsistent in thickness, which is inefficient. The thread is not sure to come off after twisting, which not only makes it difficult to improve production efficiency, but also affects the quality of the twisted yarn. Utility Model Content

[0003] The purpose of the utility model is to solve the problem in the prior art that when it is necessary to convert small-scale batches and adjust the twisted thread length for a long time, the thread needs to be manually repeatedly stacked within a certain effective length and then twisted and kneaded to make it thicker. The manual processing method is difficult to control the length during the repeated stacking process, the twisting results are inconsistent in thickness, the efficiency is poor, and the thread is not sure to come off after twisting, which not only makes it difficult to improve production efficiency but also affects the quality of the twisted thread. The utility model proposes an adjustable twisting mechanism for a twisting machine.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An adjustable twisting mechanism for a twisting machine includes a base, a first fixed block, a first motor, a first electro-hydraulic rod, a second electro-hydraulic rod, a second fixed block, and a second motor. The first fixed block, the first electro-hydraulic rod, the second electro-hydraulic rod, and the second fixed block are all fixedly connected to the upper side of the base. The first fixed block, the first electro-hydraulic rod, the second electro-hydraulic rod, and the second fixed block are sequentially arranged at the upper end of the base. The upper end of the first fixed block is bolted to the first motor. The twisting mechanism also includes a twisting adjustment assembly, which is arranged above the base and is used to twist the yarn raw material and adjust the twist length.

[0006] The winding adjustment component is arranged above the base, and is used to wind the twisted wire and adjust the tightness of the winding.

[0007] Preferably, the twist adjustment assembly includes: a first connecting post, a first supporting block, a connecting block, four first threaded posts, a twisting disc, a motor, a second connecting post, a driving gear, two driven gears, two second threaded posts, an adjusting disc, a rotating disc and a twisting wheel;

[0008] One end of the first connecting column is key-connected to the output shaft of the first motor. Four second wire passing holes adapted to the first threaded columns are provided on the twisting disc. The other end of the first connecting column sequentially passes through the first support block, the connecting block and the twisting disc and is rotatably connected to the first support block. The first connecting column is fixedly connected to the connecting block and the twisting disc. Four faces of the connecting block are respectively fixedly connected to the four first threaded columns. Raw material bobbins are sleeved on the four first threaded columns. Nuts are threadedly connected to the first threaded columns. The motor is fixedly connected to one side of the twisting disc away from the connecting block. One end of the second connecting column is fixedly connected to the output shaft of the motor. The other end of the second connecting column passes through the driving gear and is fixedly connected to the driving gear. Two driven gears are symmetrically arranged. The driven gears are meshed with the driving gear. An internal threaded hole adapted to the second threaded column is provided on the adjusting disc. One end of the second threaded column sequentially passes through the driven gear and the twisting disc and is rotatably connected to the twisting disc. The other end of the second threaded column sequentially passes through the internal threaded hole and the rotating disc and is rotatably connected to the rotating disc. The second threaded column is fixedly connected to the driven gear. The second threaded column is threadedly connected to the adjusting disc. An inner ring of the adjusting disc is arranged on the adjusting disc. The inner ring of the adjusting disc is rotatably connected to the adjusting disc. The rotating disc is provided with an inner ring of the rotating disc. The inner ring of the rotating disc is rotatably connected to the rotating disc. A first wire passing hole is provided on the inner ring of the rotating disc. A mounting hole is provided on the inner ring of the adjusting disc. The twisting wheel is arranged in the mounting hole and is rotatably connected to the inner ring of the adjusting disc. A second support block is fixedly connected to the base. A rotating hole adapted to the rotating disc is provided on the second support block. The rotating disc is arranged in the rotating hole and is rotatably connected to the second support block. An L-shaped fixing frame is fixedly connected to the second support block. Second sliding grooves are provided on both the L-shaped fixing frame and the inner ring of the rotating disc. A sliding plate is arranged in the second sliding groove. One end of the sliding plate is fixedly connected to the inner ring of the adjusting disc. The sliding plate is slidably connected to both the inner ring of the rotating disc and the L-shaped fixing frame.

[0009] Further, through the mutual cooperation of the first connecting column, the first support block, the connecting block, the four first threaded columns, the twisting disc, the motor, the second connecting column, the driving gear, the two driven gears, the two second threaded columns, the adjusting disc, the rotating disc and the twisting wheel, the wire raw material can be twisted and the twisting length can be adjusted.

[0010] Preferably, the winding adjustment assembly includes: a first U-shaped column, a first pressing roller, a second U-shaped column, a second pressing roller, a sliding block, a third U-shaped column, an auxiliary winding roller, a third connecting column and a winding drum;

[0011] The first U-shaped column is arranged on the side of the first electro-hydraulic rod close to the first motor and is fixedly connected to the base. The inner side of the first U-shaped column is rotatably connected to the first pressing roller. The bottom of the second U-shaped column is fixedly connected to the top of the telescopic rod of the first electro-hydraulic rod. The inner side of the second U-shaped column is rotatably connected to the second pressing roller. A first sliding groove is formed in the base, and the first sliding groove is arranged on the side of the first electro-hydraulic rod away from the first U-shaped column. The sliding block is arranged in the first sliding groove and is slidably connected to the base. The upper end of the sliding block is fixedly connected to the third U-shaped column. The auxiliary winding roller is rotatably connected to the inner side of the third U-shaped column. The top of the telescopic rod of the second electro-hydraulic rod is fixedly connected to the sliding block. One end of the third connecting column is key-connected to the output shaft of the second motor, and the other end of the third connecting column penetrates through the second fixing block and is rotatably connected to the second fixing block. The winding drum is sleeved on the third connecting column.

[0012] Further, through the mutual cooperation of the first U-shaped column, the first pressing roller, the second U-shaped column, the second pressing roller, the sliding block, the third U-shaped column, the auxiliary winding roller, the third connecting column and the winding drum, the twisted wire can be wound and the winding tightness can be adjusted.

[0013] Beneficial effects:

[0014] 1. Through the mutual cooperation of the first connecting column, the first support block, the connecting block, the four first threaded columns, the twisting disc, the motor, the second connecting column, the driving gear, the two driven gears, the two second threaded columns, the adjusting disc, the rotating disc and the twisting wheel, the wire raw material can be twisted and the twisting length can be adjusted.

[0015] 2. Through the mutual cooperation of the first U-shaped column, the first pressing roller, the second U-shaped column, the second pressing roller, the sliding block, the third U-shaped column, the auxiliary winding roller, the third connecting column and the winding drum, the twisted wire can be wound and the winding tightness can be adjusted.

[0016] In the present utility model: through the mutual cooperation of the twisting adjustment component and the winding adjustment component, the wire raw material can be twisted, and at the same time, the twisting length can be adjusted. After the twisting is completed, the twisted wire is wound and the tightening degree during winding is adjusted, and the operation is simple. While improving the production efficiency, the influence on the twisting quality is reduced. Description of the drawings

[0017] Figure 1 is the three-dimensional stereogram proposed by the present utility model;

[0018] Figure 2 is the structural schematic diagram of the twisting adjustment component proposed by the present utility model;

[0019] Figure 3 is the structural schematic diagram of the winding adjustment component proposed by the present utility model;

[0020] Figure 4 For the local structure diagram proposed by the present utility model Figure 2 ;

[0021] Figure 5 For the local structure diagram proposed by the present utility model Figure 4 ;

[0022] In the figure: 1, base; 2, first fixing block; 3, first motor; 4, first electric hydraulic rod; 5, second electric hydraulic rod; 6, second fixing block; 7, second motor; 8, first connecting column; 9, first supporting block; 10, connecting block; 11, first threaded column; 12, twisting disc; 13, motor; 14, second connecting column; 15, driving gear; 16, driven gear; 17, second threaded column; 18, adjusting disc; 181, inner circle of the adjusting disc; 19, rotating disc; 191, inner circle of the rotating disc; 20, second supporting block; 201, L-shaped fixing frame; 202, sliding plate; 21, twisting wheel; 22, first U-shaped column; 23, first pressing roller; 24, second U-shaped column; 25, second pressing roller; 26, sliding block; 27, third U-shaped column; 28, auxiliary winding roller; 29, third connecting column; 30, winding drum; 31, raw material bobbin. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Embodiment 1

[0025] Referring to Figures 1-5 , an adjustable twisting mechanism for a twisting machine includes a base 1, a first fixing block 2, a first motor 3, a first electric hydraulic rod 4, a second electric hydraulic rod 5, a second fixing block 6 and a second motor 7. The first fixing block 2, the first electric hydraulic rod 4, the second electric hydraulic rod 5 and the second fixing block 6 are all fixedly connected to the upper side of the base 1. The first fixing block 2, the first electric hydraulic rod 4, the second electric hydraulic rod 5 and the second fixing block 6 are arranged in sequence at the upper end of the base 1. The upper end of the first fixing block 2 is bolted to the first motor 3. The twisting mechanism further includes a twisting adjustment assembly, which is arranged above the base 1 and is used for twisting the wire raw material and adjusting the twisting length;

[0026] A winding adjustment assembly, which is arranged above the base 1 and is used for winding the twisted wire and adjusting the winding tightness.

[0027] In the present utility model, the twisting wire adjusting assembly includes: a first connecting column 8, a first supporting block 9, a connecting block 10, four first threaded columns 11, a twisting wire disc 12, a motor 13, a second connecting column 14, a driving gear 15, two driven gears 16, two second threaded columns 17, an adjusting disc 18, a rotating disc 19, and a twisting wire wheel 21;

[0028] One end of the first connecting column 8 is key-connected to the output shaft of the first motor 3. Four second wire passing holes adapted to the first threaded columns 11 are formed in the twisting disc 12. The other end of the first connecting column 8 sequentially penetrates through the first support block 9, the connecting block 10 and the twisting disc 12 and is rotatably connected to the first support block 9. The first connecting column 8 is fixedly connected to the connecting block 10 and the twisting disc 12. Four surfaces of the connecting block 10 are respectively fixedly connected to the four first threaded columns 11. Raw material wire reels 31 are sleeved on the four first threaded columns 11. Nuts are threadedly connected to the first threaded columns 11. The motor 13 is fixedly connected to the side of the twisting disc 12 away from the connecting block 10. One end of the second connecting column 14 is fixedly connected to the output shaft of the motor 13. The other end of the second connecting column 14 penetrates through the driving gear 15 and is fixedly connected to the driving gear 15. Two driven gears 16 are symmetrically arranged. The driven gears 16 are meshed with the driving gear 15. An internal threaded hole adapted to the second threaded column 17 is formed in the adjusting disc 18. One end of the second threaded column 17 sequentially penetrates through the driven gear 16 and the twisting disc 12 and is rotatably connected to the twisting disc 12. The other end of the second threaded column 17 sequentially penetrates through the internal threaded hole and the rotating disc 19 and is rotatably connected to the rotating disc 19. The second threaded column 17 is fixedly connected to the driven gear 16. The second threaded column 17 is threadedly connected to the adjusting disc 18. An adjusting disc inner ring 181 is arranged on the adjusting disc 18. The adjusting disc inner ring 181 is rotatably connected to the adjusting disc 18. The rotating disc 19 is provided with a rotating disc inner ring 191. The rotating disc inner ring 191 is rotatably connected to the rotating disc 19. A first wire passing hole is formed in the rotating disc inner ring 191. A mounting hole is formed in the adjusting disc inner ring 181. The twisting wheel 21 is arranged in the mounting hole and is rotatably connected to the adjusting disc inner ring 181. A second support block 20 is fixedly connected to the base 1. A rotating hole adapted to the rotating disc 19 is formed in the second support block 20. The rotating disc 19 is arranged in the rotating hole and is rotatably connected to the second support block 20. An L-shaped fixing frame 201 is fixedly connected to the second support block 20. Second sliding grooves are formed in both the L-shaped fixing frame 201 and the rotating disc inner ring 191. A sliding plate 202 is arranged in the second sliding groove. One end of the sliding plate 202 is fixedly connected to the adjusting disc inner ring. The sliding plate 202 is respectively slidably connected to the rotating disc inner ring 191 and the L-shaped fixing frame 201. Through the mutual cooperation of the first connecting column 8, the first support block 9, the connecting block 10, the four first threaded columns 11, the twisting disc 12, the motor 13, the second connecting column 14, the driving gear 15, the two driven gears 16, the two second threaded columns 17, the adjusting disc 18, the rotating disc 19 and the twisting wheel 21, the wire raw material can be twisted and the twisting length can be adjusted.

[0029] In the present utility model, the winding and adjusting assembly includes: a first U-shaped column 22, a first pressing roller 23, a second U-shaped column 24, a second pressing roller 25, a sliding block 26, a third U-shaped column 27, an auxiliary winding roller 28, a third connecting column 29 and a winding drum 30;

[0030] The first U-shaped column 22 is arranged on one side of the first electro-hydraulic rod 4 close to the first motor 3 and fixedly connected to the base 1. The inner side of the first U-shaped column 22 is rotatably connected to the first pressing roller 23. The bottom of the second U-shaped column 24 is fixedly connected to the top of the telescopic rod of the first electro-hydraulic rod 4. The inner side of the second U-shaped column 24 is rotatably connected to the second pressing roller 25. A first sliding groove is formed in the base 1, and the first sliding groove is arranged on one side of the first electro-hydraulic rod 4 away from the first U-shaped column 22. The sliding block 26 is arranged in the first sliding groove and slidably connected to the base 1. The upper end of the sliding block 26 is fixedly connected to the third U-shaped column 27. The auxiliary winding roller 28 is rotatably connected to the inner side of the third U-shaped column 27. The top of the telescopic rod of the second electro-hydraulic rod 5 is fixedly connected to the sliding block 26. One end of the third connecting column 29 is key-connected to the output shaft of the second motor 7, and the other end of the third connecting column 29 penetrates through the second fixing block 6 and is rotatably connected to the second fixing block 6. The winding drum 30 is sleeved on the third connecting column 29. Through the mutual cooperation of the first U-shaped column 22, the first pressing roller 23, the second U-shaped column 24, the second pressing roller 25, the sliding block 26, the third U-shaped column 27, the auxiliary winding roller 28, the third connecting column 29 and the winding drum 30, the twisted wire can be wound and the winding tightness can be adjusted.

[0031] It should be noted that: the specific models of the motor, the motor 13 and the electro-hydraulic rod are selected by those skilled in the relevant art, and the above-mentioned motor, the motor 13 and the electro-hydraulic rod all belong to the prior art, and will not be elaborated in this solution.

[0032] The working principle of the present utility model:

[0033] First, externally connect the power supply to the equipment that requires electricity. Then, sequentially pass the original wire on the raw material spool that needs to be twisted through the corresponding second wire passing holes on the twisting disc 12, and then wind it around the twisting wheel 21. Start the first motor 3. The rotation of the output shaft of the first motor 3 drives the first connecting column 8 to rotate. The rotation of the first connecting column 8 drives the connecting block 10 and the twisting disc 12 to rotate together. The rotation of the connecting block 10 drives the first threaded column 11 and the raw material spool 31 to rotate together. The rotation of the twisting disc 12 drives the motor 13, the second connecting column 14, the driving gear 15, the two driven gears 16, the two second threaded columns 17, the adjusting disc 18, the rotating disc 19 and the twisting wheel 21 to rotate together, thereby driving the original wire to rotate together and twist the original wire. Start the motor 13. The rotation of the output shaft of the motor 13 drives the second connecting column 14 to rotate. The rotation of the second connecting column 14 drives the driving gear 15 to rotate. The rotation of the driving gear 15 drives the two driven gears 16 to rotate. The rotation of the driven gears 16 drives the second threaded column 17 to rotate. The rotation of the second threaded column 17 drives the adjusting disc 18 and the twisting wheel 21 to move on the second threaded column 17, so that the adjusting disc 18 approaches or moves away from the twisting disc 12, thereby driving the inner ring 181 of the adjusting disc and the twisting wheel 21 to approach or move away from the twisting disc 12, so as to adjust the twisting length. Pass the twisted silk thread sequentially under the first pressing roller 23, above the second pressing roller 25, under the auxiliary winding roller 28, and then wind it around the winding drum 30. Start the second motor 7. The rotation of the output shaft of the second motor 7 drives the third connecting column 29 to rotate. The rotation of the third connecting column 29 drives the winding drum 30 to rotate, thereby winding the twisted silk thread. Start the first electro-hydraulic rod 4. The telescopic rod of the first electro-hydraulic rod 4 expands and contracts to drive the second U-shaped block 24 and the second pressing roller 25 to move up and down, thereby adjusting the tightness during winding. Start the second electro-hydraulic rod 5. The telescopic rod of the second electro-hydraulic rod 5 expands and contracts to drive the sliding block 26, the third U-shaped column 27 and the auxiliary winding roller 28 to approach or move away from the second electro-hydraulic rod 5, thereby assisting the winding drum 30 to wind the silk thread orderly. After the winding is completed, cut off the silk thread, replace the new winding drum 30, and then repeat the above steps.

[0034] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An adjustable twisting mechanism for a twisting machine, comprising a base (1), a first fixing block (2), a first motor (3), a first electro-hydraulic rod (4), a second electro-hydraulic rod (5), a second fixing block (6) and a second motor (7). The first fixing block (2), the first electro-hydraulic rod (4), the second electro-hydraulic rod (5) and the second fixing block (6) are all fixedly connected to the upper side of the base (1). The first fixing block (2), the first electro-hydraulic rod (4), the second electro-hydraulic rod (5) and the second fixing block (6) are sequentially arranged at the upper end of the base (1). The upper end of the first fixing block (2) is bolted to the first motor (3), and it is characterized in that, The twisting mechanism further includes a twisting adjustment component, which is arranged above the base (1). The twisting adjustment component is used for twisting the wire raw material and adjusting the twisting length. The winding adjustment component is arranged above the base (1). The winding adjustment component is used for winding the twisted wire and adjusting the winding tightness.

2. The adjustable twisting mechanism of a twisting machine according to claim 1, wherein The twisting adjustment component includes: a first connecting column (8), a first support block (9), a connecting block (10), four first threaded columns (11), a twisting disk (12), a motor (13), a second connecting column (14), a driving gear (15), two driven gears (16), two second threaded columns (17), an adjusting disk (18), a rotating disk (19), and a twisting wheel (21). One end of the first connecting column (8) is key-connected to the output shaft of the first motor (3). The other end of the first connecting column (8) sequentially passes through the first support block (9), the connecting block (10), and the twisting disk (12) and is rotatably connected to the first support block (9). The first connecting column (8) is fixedly connected to the connecting block (10) and the twisting disk (12). Four faces of the connecting block (10) are respectively fixedly connected to the four first threaded columns (11). The motor (13) is fixedly connected to the side of the twisting disk (12) away from the connecting block (10). One end of the second connecting column (14) is fixedly connected to the output shaft of the motor (13). The other end of the second connecting column (14) passes through the driving gear (15) and is fixedly connected to the driving gear (15). The two driven gears (16) are symmetrically arranged and the driven gears (16) are meshed with the driving gear (15). One end of the second threaded column (17) sequentially passes through the driven gear (16) and the twisting disk (12) and is rotatably connected to the twisting disk (12). The other end of the second threaded column (17) sequentially passes through the adjusting disk (18) and the rotating disk (19) and is rotatably connected to the rotating disk (19). The second threaded column (17) is fixedly connected to the driven gear (16) and is threadedly connected to the adjusting disk (18). An adjusting disk inner ring (181) is arranged on the adjusting disk (18), and the adjusting disk inner ring (181) is rotatably connected to the adjusting disk (18). The rotating disk (19) is provided with a rotating disk inner ring (191), and the rotating disk inner ring (191) is rotatably connected to the rotating disk (19). A first wire passing hole is formed in the rotating disk inner ring (191). A mounting hole is formed in the adjusting disk inner ring (181). The twisting wheel (21) is arranged in the mounting hole and is rotatably connected to the adjusting disk inner ring (181).

3. The adjustable twisting mechanism of a twisting machine according to claim 1, characterized in that, The winding adjustment component includes: a first U-shaped column (22), a first pressing roller (23), a second U-shaped column (24), a second pressing roller (25), a sliding block (26), a third U-shaped column (27), an auxiliary winding roller (28), a third connecting column (29), and a winding cylinder (30). The first U-shaped column (22) is arranged on the side of the first electro-hydraulic rod (4) close to the first motor (3) and fixedly connected to the base (1). The inner side of the first U-shaped column (22) is rotatably connected to the first pressing roller (23). The bottom of the second U-shaped column (24) is fixedly connected to the top of the telescopic rod of the first electro-hydraulic rod (4). The inner side of the second U-shaped column (24) is rotatably connected to the second pressing roller (25). A first sliding groove is formed in the base (1), and the first sliding groove is arranged on the side of the first electro-hydraulic rod (4) away from the first U-shaped column (22). A sliding block (26) is arranged in the first sliding groove and slidably connected to the base (1). The upper end of the sliding block (26) is fixedly connected to the third U-shaped column (27). The auxiliary winding roller (28) is rotatably connected to the inner side of the third U-shaped column (27). The top of the telescopic rod of the second electro-hydraulic rod (5) is fixedly connected to the sliding block (26). One end of the third connecting column (29) is key-connected to the output shaft of the second motor (7), and the other end of the third connecting column (29) penetrates through the second fixing block (6) and is rotatably connected to the second fixing block (6). The winding drum (30) is sleeved on the third connecting column (29).

4. The adjustable twisting mechanism of a twisting machine according to claim 2, characterized in that, The adjusting disc (18) is provided with an internal thread hole adapted to the second threaded column (17). The second threaded column (17) penetrates through the internal thread hole and is threadedly connected to the adjusting disc (18).

5. The adjustable twisting mechanism of a twisting machine according to claim 2, characterized in that, A second support block (20) is fixedly connected to the base (1). A rotating hole adapted to the rotating disc (19) is formed in the second support block (20). The rotating disc (19) is arranged in the rotating hole and rotatably connected to the second support block (20). An L-shaped fixing frame (201) is fixedly connected to the second support block (20). Second sliding grooves are formed in both the L-shaped fixing frame (201) and the inner ring (191) of the rotating disc. A sliding plate (202) is arranged in the second sliding groove. One end of the sliding plate (202) is fixedly connected to the inner ring of the adjusting disc. The sliding plate (202) is slidably connected to the inner ring (191) of the rotating disc and the L-shaped fixing frame (201) respectively.

6. The adjustable twisting mechanism of a twisting machine according to claim 1, characterized in that, Raw material reels (31) are sleeved on all four first threaded columns (11), and nuts are threadedly connected to the first threaded columns (11).

7. An adjustable twisting mechanism for a twisting machine according to claim 1, characterized in that, Four second wire passing holes adapted to the first threaded columns (11) are formed in the twisting disc (12).

Images