A needle selection and reset mechanism for a jacquard machine

Abstract

The present invention provides a needle selection and reset mechanism for a jacquard machine, which relates to the technical field of textile machinery. It includes a support table, above which there are two connecting rods. At the upper ends of the two connecting rods, there are fixedly connected connecting blocks. Inside the support table, a needle selector is fixedly connected by screws. Inside the needle selector, there is a set of knitting needles. On the front surface of the support table, there is a controller. On the rear surfaces of the two connecting rods, there are fixedly connected L-shaped blocks. The controller sends an electrical signal according to the preset pattern data, and the needle selector receives the signal. Inside it, a set of electromagnetic blocks generate a magnetic field. The set of knitting needles are all made of magnetic materials. Under the action of the magnetic field of the set of electromagnetic blocks, the set of knitting needles are subjected to a magnetic force and generate displacement. This displacement causes a change in the acting part of the knitting needle, thereby determining whether the knitting needle participates in knitting. When the knitting needle rises under the action of the electromagnetic force, it can interweave with the warp yarns for knitting.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile machinery, and more specifically, particularly relates to a needle selection and reset mechanism for a jacquard machine. Background Art

[0002] A jacquard machine is a textile machine mainly used for weaving complex and diverse pattern designs on fabrics. It precisely controls knitting needles so that different knitting needles participate or do not participate in the knitting work at different times, thereby interweaving warp and weft yarns to form a fabric with a specific pattern. The jacquard machine is widely used in the production of various fabrics that require complex patterns, such as silk, carpets, and decorative fabrics. The needle selection and reset mechanism is a key component in the jacquard machine, and its main function is to select specific knitting needles from numerous knitting needles to participate in the knitting work to achieve the knitting of a specific pattern.

[0003] The existing needle selection and reset mechanisms of jacquard machines still have the following disadvantages:

[0004] 1. Most jacquard machines use mechanical cams and other methods for needle selection. However, mechanical components will wear during long-term operation. The contour of the cam will change slightly due to continuous friction with the needle selection elements, and the connection parts of the link mechanism will also become loose. These changes in the mechanical structure will cause deviations in the needle selection position, and with the increase in the usage time, the error will gradually accumulate, reducing the accuracy of needle selection, and thus affecting the accuracy and clarity of the fabric pattern.

[0005] 2. When weaving wide-width fabrics, the force on the edge and middle knitting needles may be different. If the clamping structure cannot be flexibly adjusted to balance the tension, it will result in inconsistent knitting densities at different positions of the fabric, affecting the quality and appearance of the fabric.

[0006] 3. During the fabric processing, it is necessary to move the fabric to a dedicated cutting device for cutting and then perform the next processing operation. This series of operations increases the complexity and tediousness of the work process, reduces the production efficiency, and is not conducive to achieving efficient batch production.

[0007] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a needle selection and reset mechanism for a jacquard machine is provided with the expectation of achieving a more practical value. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides a needle selection and reset mechanism for a jacquard machine to solve the above problems.

[0009] A needle selection and reset mechanism for a jacquard machine, including a support platform. Above the support platform, there are two connecting rods. At the upper ends of the two connecting rods, there are connecting blocks fixedly connected. Inside the support platform, a needle selector is fixedly connected by screws. Inside the needle selector, there is a set of knitting needles. On the front surface of the support platform, there is a controller. On the rear surfaces of the two connecting rods, there are L-shaped blocks fixedly connected. On the rear surface of the support platform, there is a connecting plate. On the front surface of the connecting plate, there is a gear rotatably connected. On the upper surface of the needle selector, there is a fixing plate. On the surface of each knitting needle, there is a disc fixedly connected. On the upper surface of each disc, there is a first spring fixedly connected. Each first spring is fixedly connected to the fixing plate. Inside the needle selector, there is a set of electromagnetic blocks. On the upper surfaces of the two connecting blocks, there are two limiting blocks fixedly connected. Between the two pairs of limiting blocks, there are two movable plates. On the opposite surfaces of the two movable plates, there are fixing rods fixedly connected. On the opposite surfaces of the two connecting blocks, there are through pipes fixedly connected. On the opposite surfaces of the two through pipes, there are extension plates fixedly connected. On the upper surfaces of the two extension plates, there are bottom knives fixedly connected. At the lower ends of the two through pipes, there are collection boxes movably connected. On the left and right sides of the connecting plate, there are fixing blocks fixedly connected. The two fixing blocks are respectively movably connected to the two L-shaped blocks.

[0010] Preferably, a motor is fixedly installed on the rear surface of the connecting plate. The output shaft of the motor is fixedly connected to the gear. On the opposite surfaces of the two L-shaped blocks, there is a set of second card slots. The two sets of second card slots are both movably clamped with the gear. On the upper surface of the needle selector, there are two pairs of clamping blocks fixedly connected. The two pairs of clamping blocks are both fixedly connected to the fixing plate. The fixing plate is movably clamped with a set of knitting needles.

[0011] Preferably, a set of protective rings is fixedly connected to the inner wall of the needle selector. The set of electromagnetic blocks are all arranged inside the set of protective rings. The set of protective rings are respectively movably sleeved on a set of knitting needles. On the lower surfaces of the two connecting rods, there are sliders fixedly connected. On the upper surface of the support platform, there are two first card slots. The two first card slots are respectively movably connected to the two sliders. On the upper surfaces of the two connecting blocks, there are cylinders fixedly installed. The output shafts of the two cylinders are both fixedly connected with cutting knives.

[0012] Preferably, on the opposite surfaces of the two fixing rods, there are clamping strips fixedly connected. On the opposite surfaces of the two clamping strips, there is a set of clamping wheels rotatably connected. On the lower surfaces of the two movable plates, there are two second springs fixedly connected. The two pairs of second springs are respectively fixedly connected to the two connecting blocks.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In the present invention, the electromagnetic drive is less affected by environmental factors such as temperature and humidity. In different working environments, the electromagnetic needle selection can maintain relatively stable performance, ensuring the accuracy and reliability of needle selection. In addition, during the knitting process, the knitting needles need to overcome the acting forces such as the tension of the yarn. The electromagnetic drive needle selection can provide sufficient driving force to ensure the smooth completion of the needle selection action. Even in the case of large yarn tension, it can work stably.

[0015] In the present invention, during the rotation of the output shaft of the motor, the gear fixed to it will be driven to rotate together. During the rotation of the gear, two L-shaped blocks engaged with it will be driven to move. During the relative movement of the two L-shaped blocks, the connecting rod fixed to them will be driven to move together. The two connecting rods are movably connected to the support table through the sliders fixed on them. During the movement of the two connecting rods, the connecting block fixed on them will be driven to move together. At this time, flexible adjustment can be made according to the size of the fabric, thus ensuring the stability of clamping the fabric.

[0016] In the present invention, the design of the rotation of a set of clamping wheels can ensure that the clamping will not affect the movement of the fabric. Through two sets of clamping wheels, the tension and position of the fabric during the knitting process can be controlled. Whether in the length, width or thickness direction of the fabric, the two sets of clamping wheels can avoid problems such as excessive stretching, shrinkage or deformation of the fabric by adjusting the clamping position, making the fabric meet the designed size requirements.

[0017] In the present invention, cutting makes the edges of the fabric clean and tidy. This not only improves the appearance of the fabric but also reduces subsequent processing problems that may be caused by frayed edge defects. The frayed edges after cutting will fall into the collection box below through the middle pipe for collection. The collection box is movably connected to the middle pipe through the groove opened on it. This structure allows the fabric to be directly edge-cut on the production line without transferring the fabric to other equipment for separate treatment, reducing the production process and production time and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the connecting rod structure of the present invention;

[0020] Figure 3 is a schematic diagram of the needle selector structure of the present invention;

[0021] Figure 4 is a schematic diagram of the knitting needle structure of the present invention;

[0022] Figure 5 is a schematic diagram of the L-shaped block structure of the present invention;

[0023] Figure 6It is a schematic structural diagram of the connection block of the present invention;

[0024] Figure 7 It is a schematic structural diagram of the movable plate of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the cutting knife of the present invention.

[0026] In the figure, the corresponding relationship between the component names and the drawing numbers is as follows: 1, support table; 2, controller; 3, needle selector; 4, fixing plate; 5, connecting rod; 6, connecting block; 7, knitting needle; 8, L-shaped block; 9, first card slot; 10, connecting plate; 11, motor; 12, first spring; 13, disc; 14, clamping block; 15, protective ring; 16, electromagnet; 17, gear; 18, fixing block; 19, second card slot; 20, cylinder; 21, movable plate; 22, collection box; 23, slider; 24, fixing rod; 25, clamping strip; 26, second spring; 28, clamping wheel; 29, through pipe; 30, limiting block; 31, cutting knife; 32, bottom knife; 33, extension plate. Detailed implementation manners

[0027] The following further describes the implementation manners of the present invention in detail with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Please refer to Figure 1 - Figure 8, the present invention provides a needle selection and reset mechanism for a jacquard machine, including a support table 1. Above the support table 1, there are two connecting rods 5. At the upper ends of the two connecting rods 5, there are fixedly connected connecting blocks 6. Inside the support table 1, a needle selector 3 is fixedly connected by screws. Inside the needle selector 3, there is a set of knitting needles 7. On the front surface of the support table 1, there is a controller 2. On the rear surfaces of the two connecting rods 5, there are fixedly connected L-shaped blocks 8. On the rear surface of the support table 1, there is a fixedly connected connecting plate 10. On the front surface of the connecting plate 10, a gear 17 is rotatably connected. On the upper surface of the needle selector 3, there is a fixed plate 4. On the surface of each knitting needle 7, there is a fixedly connected disc 13. On the upper surface of each disc 13, there is a fixedly connected first spring 12. Each first spring 12 is fixedly connected to the fixed plate 4. Inside the needle selector 3, there is a set of electromagnetic blocks 16. On the upper surfaces of the two connecting blocks 6, there are fixedly connected two limiting blocks 30. Between the two pairs of limiting blocks 30, there are two movable plates 21. On the opposite surfaces of the two movable plates 21, there are fixedly connected fixed rods 24. On the opposite surfaces of the two connecting blocks 6, there are fixedly connected through tubes 29. On the opposite surfaces of the two through tubes 29, there are fixedly connected extension plates 33. On the upper surfaces of the two extension plates 33, there are fixedly connected bottom knives 32. At the lower ends of the two through tubes 29, there are movably connected collecting boxes 22. On the left and right sides of the connecting plate 10, there are fixedly connected fixed blocks 18. The two fixed blocks 18 are respectively movably connected to the two L-shaped blocks 8. Different knitting needles 7 are intertwined with the corresponding warp yarns at different times according to the requirements of the pattern, and finally a complex and diverse webbing pattern is woven. Compared with some other driving methods, electromagnetic driving is less affected by environmental factors such as temperature and humidity. In different working environments, electromagnetic needle selection can maintain relatively stable performance, ensuring the accuracy and reliability of needle selection. In addition, during the knitting process, the knitting needles 7 need to overcome the acting forces such as the tension of the yarn. Electromagnetic driving needle selection can provide sufficient driving force to ensure the smooth completion of the needle selection action. Even when the yarn tension is relatively large, it can still work stably.

[0029] A motor 11 is fixedly installed on the rear surface of the connecting plate 10. The output shaft of the motor 11 is fixedly connected to the gear 17. A set of second card slots 19 are respectively formed on the opposite surfaces of the two L-shaped blocks 8. Both sets of second card slots 19 are movably clamped with the gear 17. Two pairs of clamping blocks 14 are fixedly connected to the upper surface of the needle selector 3. Both pairs of clamping blocks 14 are fixedly connected to the fixing plate 4. The fixing plate 4 is movably clamped with a set of knitting needles 7. When knitting, the left and right ends of the fabric are respectively clamped in the two connecting blocks 6 for fixation. First, the motor 11 is started by the controller 2. During the rotation of the output shaft of the motor 11, the gear 17 fixed thereto will be driven to rotate together. During the rotation of the gear 17, the two L-shaped blocks 8 clamped thereto will be driven to move. During the relative movement of the two L-shaped blocks 8, the connecting rods 5 fixed thereto will be driven to move together. The two connecting rods 5 are both movably connected to the support table 1 through the sliders 23 fixed thereon. During the movement of the two connecting rods 5, the connecting blocks 6 fixed thereon will be driven to move together. At this time, flexible adjustment can be made according to the size of the fabric, so as to ensure the stability of clamping the fabric.

[0030] A set of protective rings 15 are fixedly connected to the inner wall of the needle selector 3. A set of electromagnetic blocks 16 are respectively arranged in the set of protective rings 15. The set of protective rings 15 are respectively movably sleeved with a set of knitting needles 7. The lower surfaces of the two connecting rods 5 are both fixedly connected with sliders 23. Two first card slots 9 are formed on the upper surface of the support table 1. The two first card slots 9 are respectively movably connected with the two sliders 23. Cylinders 20 are fixedly installed on the upper surfaces of the two connecting blocks 6. The output shafts of the two cylinders 20 are both fixedly connected with cutting knives 31. By pushing the fixed rod 24 upward, the movable plate 21 and the clamping strip 25 fixed thereto will be driven to move together. During the upward movement of the movable plate 21, the two second springs 26 are stretched. The clamping strip 25 will drive a set of clamping wheels 28 rotatably arranged thereon to move. At this time, the fabric is placed between the set of clamping wheels 28 and the connecting block 6. The elastic force of the two second springs 26 drives the set of clamping wheels 28 to reset. The design of the rotation of the set of clamping wheels 28 can not only ensure clamping but also not affect the movement of the fabric. The two sets of clamping wheels 28 can control the tension and position of the fabric during the knitting process. Whether in the length, width or thickness direction of the fabric, the two sets of clamping wheels 28 can avoid problems such as excessive stretching, shrinkage or deformation of the fabric by adjusting the clamping position, so that the fabric meets the designed dimensional requirements.

[0031] A clamping strip 25 is fixedly connected to the back surface of each of the two fixed rods 24. A set of clamping wheels 28 are rotatably connected to the back surface of each of the two clamping strips 25. Two springs two 26 are fixedly connected to the lower surface of each of the two movable plates 21. The two pairs of springs two 26 are respectively fixedly connected to the two connecting blocks 6. During the weaving process, defects such as frayed edges and loose yarns often occur at the edges of the fabric. When cutting is required for both side edges of the fabric, by starting the cylinder 20, its output shaft will drive the cutting knife 31 fixed thereto to move together. During the downward movement of the cutting knife 31, it cooperates with the bottom knife 32 to cut the fabric. Through cutting, the edges of the fabric are made clean and tidy, which not only improves the appearance of the fabric but also reduces subsequent processing problems that may be caused by frayed edge defects. The frayed edges after cutting will fall into the collection box 22 below through the through pipe 29 for collection. The collection box 22 is movably connected to the through pipe 29 through the groove provided thereon. This structure enables the fabric to directly perform edge cutting on the production line without transferring the fabric to other equipment for separate treatment, reducing the production process and production time and improving production efficiency.

[0032] Working principle:

[0033] First step, during use, the controller 2 emits an electrical signal according to the preset pattern data. The selector 3 receives the signal, and a set of electromagnetic blocks 16 inside it generate a magnetic field. A set of knitting needles 7 are all made of magnetic materials. Under the action of the magnetic field of the set of electromagnetic blocks 16, the set of knitting needles 7 are subjected to a magnetic force and generate a displacement. This displacement causes a change in the acting part of the knitting needle 7, thereby determining whether the knitting needle 7 participates in knitting. When the knitting needle 7 rises under the action of the electromagnetic force, it can interweave with the warp yarns for knitting. On the contrary, the knitting needle 7 does not participate in knitting, thus forming different parts of the pattern. After completing the needle selection action, it is necessary to return to the initial position to prepare for the next needle selection. During the movement of the knitting needle 7, the first spring 12 connected to it is compressed. After the needle selection action ends, the elastic restoring force of the first spring 12 will cause the knitting needle 7 to move in the reverse direction and return to its initial position. When the knitting needle 7 descends, it will move downward with the hooked warp yarns. At the same time, auxiliary components such as sinkers on the loom will work together. The sinkers will press down on the already formed old loops to prevent them from moving with the knitting needle 7. When the knitting needle 7 descends, the hooked warp yarn will bypass the needle tongue of the knitting needle 7 and form a new loop in the needle hook. The new loop is intertwined with the old loop previously pressed by the sinker. As the knitting needle 7 continuously moves up and down, new warp yarns are continuously hooked and intertwined, thus forming a continuous knitting structure. During this process, different knitting needles 7 interweave with the corresponding warp yarns at different times according to the requirements of the pattern, and finally knit out complex and diverse webbing patterns. Compared with some other driving methods, electromagnetic drive is less affected by environmental factors such as temperature and humidity. In different working environments, electromagnetic needle selection can maintain relatively stable performance, ensuring the accuracy and reliability of needle selection. In addition, during the knitting process, the knitting needle 7 needs to overcome the acting forces such as the tension of the yarn. Electromagnetic drive needle selection can provide sufficient driving force to ensure the smooth completion of the needle selection action. Even when the yarn tension is relatively large, it can work stably.

[0034] In the second step, during weaving, the left and right ends of the fabric are respectively clamped and fixed within two connecting blocks 6. First, the controller 2 is used to start the motor 11. During the rotation of the output shaft of the motor 11, it will drive the gear 17 fixed thereto to rotate together. During the rotation of the gear 17, it will drive two L-shaped blocks 8 engaged therewith to move. During the relative movement of the two L-shaped blocks 8, they will drive the connecting rod 5 fixed thereto to move together. Both connecting rods 5 are movably connected to the support table 1 through the sliders 23 fixed thereon. During the movement of the two connecting rods 5, they will drive the connecting blocks 6 fixed thereto to move together. At this time, flexible adjustment can be made according to the size of the fabric, thereby ensuring the stability of clamping the fabric. By pushing the fixing rod 24 upward, the movable plate 21 and the clamping strip 25 fixed thereto will move together. During the upward movement of the movable plate 21, the two second springs 26 are stretched. The clamping strip 25 will drive a set of clamping wheels 28 rotatably arranged thereon to move. At this time, the fabric is placed between the set of clamping wheels 28 and the connecting blocks 6. The elastic force of the two second springs 26 drives the set of clamping wheels 28 to reset. The design of the rotation of the set of clamping wheels 28 can not only ensure clamping but also not affect the movement of the fabric. Through the two sets of clamping wheels 28, the tension and position of the fabric during the weaving process can be controlled. Whether in the length, width or thickness direction of the fabric, the two sets of clamping wheels 28 can avoid problems such as excessive stretching, shrinkage or deformation of the fabric by adjusting the clamping position, so that the fabric meets the designed dimensional requirements.

[0035] In the third step, during the weaving process, defects such as frayed edges and loose yarns often occur at the edges of the fabric. When cutting is required for both side edges of the fabric, by starting the cylinder 20, its output shaft will drive the cutting knife 31 fixed thereto to move together. During the downward movement of the cutting knife 31, it cooperates with the bottom knife 32 to cut the fabric. Through cutting, the edges of the fabric are made clean and tidy. This not only improves the appearance of the fabric but also reduces subsequent processing problems that may be caused by frayed edge defects. The frayed edges after cutting will fall into the collection box 22 below through the through pipe 29 for collection. The collection box 22 is movably connected to the through pipe 29 through the groove opened thereon. This structure allows the fabric to be directly edge-cut on the production line without transferring the fabric to other equipment for separate treatment, reducing the production process and production time and improving production efficiency.

[0036] The examples of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles of the invention and its practical applications, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A needle selection and reset mechanism for a jacquard machine, comprising a support table (1), characterized in that: Above the support table (1), there are two connecting rods (5). At the upper ends of the two connecting rods (5), there are connecting blocks (6) fixedly connected. Inside the support table (1), a needle selector (3) is fixedly connected by screws. Inside the needle selector (3), there is a set of knitting needles (7). On the front surface of the support table (1), there is a controller (2). On the rear surfaces of the two connecting rods (5), there are L-shaped blocks (8) fixedly connected. On the rear surface of the support table (1), there is a connecting plate (10). On the front surface of the connecting plate (10), there is a gear (17) rotatably connected. On the upper surface of the needle selector (3), there is a fixing plate (4); Among them, on the surface of each knitting needle (7), there is a disc (13) fixedly connected. On the upper surface of each disc (13), there is a first spring (12) fixedly connected. Each first spring (12) is fixedly connected to the fixing plate (4). Inside the needle selector (3), there is a set of electromagnetic blocks (16). On the upper surfaces of the two connecting blocks (6), there are two limit blocks (30) fixedly connected. Between the two pairs of limit blocks (30), there are two movable plates (21). On the opposite surfaces of the two movable plates (21), there are fixing rods (24) fixedly connected. On the opposite surfaces of the two connecting blocks (6), there are through tubes (29) fixedly connected. On the opposite surfaces of the two through tubes (29), there are extension plates (33) fixedly connected. On the upper surfaces of the two extension plates (33), there are bottom knives (32) fixedly connected. At the lower ends of the two through tubes (29), there are collection boxes (22) movably connected; On the opposite surfaces of the two fixing rods (24), there are clamping strips (25) fixedly connected; Among them, on the opposite surfaces of the two clamping strips (25), there is a set of clamping wheels (28) rotatably connected; On the lower surfaces of the two movable plates (21), there are two second springs (26) fixedly connected; Among them, the two pairs of second springs (26) are respectively fixedly connected to the two connecting blocks (6).

2. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the left and right sides of the connecting plate (10), there are fixing blocks (18) fixedly connected; Among them, the two fixing blocks (18) are respectively movably connected to the two L-shaped blocks (8).

3. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the rear surface of the connecting plate (10), there is a motor (11) fixedly installed; Among them, the output shaft of the motor (11) is fixedly connected to the gear (17).

4. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the opposite surfaces of the two L-shaped blocks (8), there is a set of second card slots (19) opened; Among them, the two sets of second card slots (19) are both movably clamped with the gear (17).

5. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the upper surface of the needle selector (3), there are two pairs of clamping blocks (14) fixedly connected. The two pairs of clamping blocks (14) are both fixedly connected to the fixing plate (4); Among them, the fixing plate (4) is movably clamped with a set of knitting needles (7).

6. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the inner wall of the needle selector (3), there is a set of protective rings (15) fixedly connected. The set of electromagnetic blocks (16) are all arranged inside the set of protective rings (15); Among them, the set of protective rings (15) are respectively movably sleeved on a set of knitting needles (7).

7. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the lower surfaces of the two connecting rods (5), there are sliders (23) fixedly connected. On the upper surface of the support table (1), there are two first card slots (9) opened; Among them, the two card slots one (9) are respectively movably connected with the two sliders (23).

8. The needle selection and reset mechanism of a jacquard machine according to claim 1, characterized in that, On the upper surfaces of the two connecting blocks (6), air cylinders (20) are fixedly installed; Among them, the output shafts of the two air cylinders (20) are fixedly connected with cutting knives (31).

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