A needle lifting position detecting mechanism for an electronic jacquard machine

Abstract

The application discloses a needle lifting position detection mechanism of an electronic jacquard machine and belongs to the technical field of detection mechanisms. The needle lifting position detection mechanism comprises a needle lifting mechanism and a detection switch. The detection switch comprises an insulating plate and a conductive roller rotatably arranged on one side of the insulating plate. The bottom end of the needle lifting mechanism is connected with a through wire, and the bottom end of the through wire is connected with an intermittent conductive wire. When the needle lifting mechanism moves up and down, the intermittent conductive wire is driven to move up and down and contact the conductive roller, the conductive roller is rotated through friction, and the on-off state of the detection switch is judged according to the contact state of the insulating part and the conductive part. Compared with the traditional scheme, the mechanism avoids the problems of high cost, inconvenient installation and overheating of the photoelectric sensor. Compared with the sliding contact detection mechanism, the rolling contact of the conductive roller greatly reduces the abrasion, improves the detection accuracy and the service life of the equipment, and the multi-stage insulating part and conductive part are provided, so that more accurate needle lifting position detection is achieved, and the high-precision jacquard demand of the modern textile industry is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of detection mechanisms, and particularly relates to a needle lifting position detection mechanism of an electronic jacquard machine. BACKGROUND

[0002] In the field of textile machinery, the needle lifting position detection of an electronic jacquard machine is of great importance, and its accuracy directly affects the quality of the jacquard fabric. The traditional detection method has many drawbacks and needs to be improved.

[0003] In the early stage, in the detection of the needle lifting position of an electronic jacquard machine, a scheme of installing a photoelectric sensor directly below each needle is often adopted. The scheme connects the needle with a steel sheet, and a hole is opened in the middle of the steel sheet. When the fabric is lifted, the hole is located in the middle of the photoelectric sensor, the sensor receives the sensing and thus generates a signal; when the fabric is not lifted, no sensing signal is generated. By comparing the sampling data with the pattern file, the lifting problem can be found. However, this method has serious defects: first, the gap between the needles of the jacquard machine is extremely small (the minimum is only 9 mm), which requires strict requirements for the volume and anti-interference of the sensor, resulting in high detection cost. Taking a detection device with 5120 needles as an example, if the cost of a single sensor and additional circuit is 30 yuan, the overall cost is as high as 150,000 yuan or more, and if the number of needles is more, the cost is even more astonishing. Second, the installation and disassembly of the sensor are not convenient, which is extremely troublesome during equipment maintenance and debugging. Third, due to the large number of sensors required by the head device, the working current can reach hundreds of amperes, which causes great burden on the power supply and circuit, and a large amount of heat is generated in the sensor array, which causes the sensor to overheat and cannot work normally, and the detection reliability is greatly reduced.

[0004] To solve the problems of the traditional detection method, a needle lifting position detection mechanism of an electronic jacquard machine is proposed in patent CN101050577B. The mechanism uses a connecting part connected with the needle, which contains a conductor part and an insulating part. By sliding contact with the first and second electrodes of the detection switch, whether the needle is lifted is judged according to the contact state of the connecting part and the electrode (the conductor part is in contact and conduction, and the insulating part is in contact and disconnection). This method solves some problems of the traditional detection, such as cost reduction and relatively simple structure, but still has certain limitations.

[0005] In the long-term use, the sliding contact between the connecting part and the electrode is easy to cause wear, affecting the accuracy of detection and the service life of the equipment; and the detection precision is limited by the simple combination of the conductor part and the insulating part to judge the needle position, which is difficult to meet the demand of modern textile industry for high-precision lifting.

[0006] In order to avoid the above technical problems, it is necessary to provide a needle lifting position detection mechanism of an electronic jacquard machine to overcome the defects in the above-mentioned technology. SUMMARY

[0007] The purpose of this invention is to provide a needle position detection mechanism for an electronic jacquard machine to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a needle position detection mechanism for an electronic jacquard machine, comprising a needle and a detection switch, the detection switch comprising an insulating plate and a rotatable conductive roller mounted on one side of the insulating plate, the bottom end of the needle being connected to a through wire, the bottom end of the through wire being connected to an intermittent conductive wire, the intermittent conductive wire being formed by multiple insulating parts and conductive parts being connected to each other at intervals, the intermittent conductive wire being located on one side of the conductive roller, the bottom end of the intermittent conductive wire being connected to a heddle section for threading warp threads, the bottom end of the heddle section being connected to a tension spring, and the bottom end of the tension spring being connected to a mounting plate;

[0009] When the lifting needle moves up and down, it drives the intermittent conductive wire and the heddle section to move up and down through the guide wire. The intermittent conductive wire will contact the conductive contact surface on the conductive roller, and drive the conductive roller to rotate through friction. This allows the insulating part and the conductive part on the intermittent conductive wire to contact the surface of the conductive roller at different heights. When the conductive part contacts, the detection switch is turned on, and when the insulating part contacts, the detection switch is turned off.

[0010] In a preferred embodiment, the conductive roller is provided with an arc-shaped insulating inner wall, and the conductive contact surface on the conductive roller and the arc-shaped insulating inner walls on both sides of it generally form a U-shaped contact groove, and the intermittent conductive wire is located in the U-shaped contact groove.

[0011] In a preferred embodiment, the conductive contact surface of the conductive roller is provided with multiple conductive planes.

[0012] In a preferred embodiment, the plurality of conductive planes are generally in the shape of regular polygons. When the intermittent conductive wire makes contact with the conductive planes on the conductive contact surface during its up-and-down movement, the insulating and conductive parts of the wire will respectively contact the conductive planes on the conductive contact surface.

[0013] In a preferred embodiment, one side of the conductive roller abuts against one side of the intermittent conductive wire, making the entire bundle of the intermittent conductive wire arc-shaped. When the lifting needle moves up and down, the contact between the conductive roller and the intermittent conductive wire not only enables the insulating part and the conductive part to make full conductive contact, but also increases the contact friction between them, thereby effectively driving the conductive roller to rotate.

[0014] In a preferred embodiment, an insulating wheel frame is mounted on the outside of the conductive roller, and the conductive roller can rotate within the insulating wheel frame.

[0015] In a preferred embodiment, two spring plates are installed between the insulating wheel frame and the insulating plate.

[0016] As a preferred embodiment, both of the spring pieces are U-shaped.

[0017] As a preferred embodiment, both of the spring pieces are U-shaped.

[0018] As a preferred embodiment, both of the spring pieces are U-shaped.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] When the needle moves up and down, the intermittent conductive wire moves up and down and contacts the conductive roller, which is rotated through friction, and the detection switch is turned on and off according to the contact between the insulation part and the conductive part. Compared with the traditional scheme, this mechanism avoids the high cost, inconvenience of installation and overheating problems of the photoelectric sensor. Compared with the sliding contact detection mechanism, the rolling contact of the conductive roller greatly reduces wear and tear, improves detection accuracy and equipment life, and the multi-stage insulation part and conductive part provide more accurate needle position detection to meet the high-precision jacquard requirements of modern textile industry.

[0021] The plurality of conductive planes on the conductive roller are collectively regular polygons, and when the needle moves up and down, the insulation part and the conductive part of the intermittent conductive wire can be contacted with the conductive plane respectively. This design increases the orderliness and accuracy of the contact, improves the detection accuracy, and at the same time, the intermittent conductive wire is pressed on one side of the conductive roller to make the wire bundle contact surface arc-shaped. This setting not only ensures the full conductive contact between the insulation part and the conductive part, but also increases the contact friction between the two, providing sufficient power for the rotation of the conductive roller, stably realizing the rolling conductive contact, effectively avoiding detection errors caused by poor contact, further enhancing the reliability and stability of the detection mechanism, and better meeting the demand of modern textile industry for high-precision jacquard position detection.

[0022] The U-shaped contact groove on the conductive roller is composed of a conductive contact surface and two arc-shaped insulation inner walls, which can effectively limit the position of the intermittent conductive wire, so that it can stably contact the conductive plane when moving up and down, ensuring the accurate transmission of detection signals. The intermittent conductive wire is pressed on one side of the conductive roller to make the wire bundle arc-shaped, which also optimizes the contact effect. In addition, the two U-shaped spring pieces installed between the insulation wheel frame and the insulation plate use the rebound of the spring pieces to cooperate with the pressing of the conductive roller, further ensuring the position stability of the intermittent conductive wire in the U-shaped contact groove, preventing it from moving accidentally, providing stable support for the needle movement of the electronic jacquard machine, and effectively improving the reliability and stability of the detection mechanism as a whole.

[0023] The present application is connected by the mode of adapter block and bolt, so that the installation process of spring sheet is simple and accurate, the installation personnel can quickly position the spring sheet according to the position of the adapter block, and the installation and debugging time is reduced through bolt fastening, meanwhile, the adapter block distributed in wrong position avoids the interference between the installation components, improves the convenience and reliability of mechanism installation, and helps to ensure that the needle lifting position detection mechanism of the electronic jacquard machine can be efficiently and stably put into use. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0025] Figure 2 It is a schematic diagram of the side view of the intermittent conductive wire of the present application;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the heald part of the present application;

[0027] Figure 4 It is a schematic diagram of the arc-shaped contact of the intermittent conductive wire of the present application;

[0028] Figure 5 It is a schematic diagram of the sectional view of the conductive roller of the present application;

[0029] Figure 6 It is a schematic diagram of the top view of the conductive roller of the present application;

[0030] Figure 7 It is a schematic diagram of the side view of the conductive roller of the present application;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the spring sheet of the present application;

[0032] Figure 9 It is a schematic diagram of the three-dimensional structure of the adapter block of the present application.

[0033] In the figure: 1, needle lifting; 2, detection switch; 21, insulating plate; 22, conductive roller; 221, circular arc-shaped insulating inner wall; 222, conductive plane; 223, insulating roller frame; 224, spring sheet; 2241, adapter block; 3, heald part; 4, tension spring; 5, weft wire; 6, intermittent conductive wire; 61, insulating part; 62, conductive part. DETAILED DESCRIPTION

[0034] The present application will be further described below in combination with examples.

[0035] The following examples are used to illustrate the present application, but cannot be used to limit the protection scope of the present application. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the present application under the concept of the present application all belong to the scope of protection of the present application.

[0036] Please see Figures 1-9 The present invention provides a needle position detection mechanism for an electronic jacquard machine, including a needle 1 and a detection switch 2. The detection switch 2 includes an insulating plate 21 and a rotatable conductive roller 22 mounted on one side of the insulating plate 21. The bottom end of the needle 1 is connected to a through wire 5, and the bottom end of the through wire 5 is connected to an intermittent conductive wire 6. The intermittent conductive wire 6 is formed by multiple insulating parts 61 and conductive parts 62 connected to each other at intervals. The intermittent conductive wire 6 is located on one side of the conductive roller 22. The bottom end of the intermittent conductive wire 6 is connected to a heddle part 3 for threading warp threads. The bottom end of the heddle part 3 is connected to a tension spring 4, and the bottom end of the tension spring 4 is connected to a mounting plate 7.

[0037] When the lifting needle 1 moves up and down, it drives the intermittent conductive wire 6 and the heddle section 3 to move up and down through the guide wire 5. The intermittent conductive wire 6 contacts the conductive contact surface on the conductive roller 22, and drives the conductive roller 22 to rotate through friction. This allows the insulating part 61 and the conductive part 62 on the intermittent conductive wire 6 to contact the surface of the conductive roller 22 at different heights. When the conductive part 62 contacts, the detection switch 2 is turned on; when the insulating part 61 contacts, the detection switch 2 is turned off. When the lifting needle 1 moves up and down, it drives the intermittent conductive wire 6 to move up and down and contact the conductive roller 22, causing it to rotate through friction. The on / off state of the detection switch 2 is determined by the contact condition of the insulating part 61 and the conductive part 62. Compared with the traditional solution, this mechanism avoids the high cost, inconvenient installation, and overheating problems of photoelectric sensors. Compared with the sliding contact detection mechanism, the rolling contact of the conductive roller 22 greatly reduces wear, improves detection accuracy and equipment life, and the multi-level setting of the insulating part 61 and the conductive part 62 provides more accurate detection of the position of the lifting needle 1, meeting the high-precision jacquard requirements of the modern textile industry.

[0038] like Figure 4 As shown, the conductive roller 22 is provided with an arc-shaped insulating inner wall 221. The conductive contact surface on the conductive roller 22 and the arc-shaped insulating inner wall 221 on both sides of it generally form a U-shaped contact groove, and the intermittent conductive wire 6 is located in the U-shaped contact groove.

[0039] like Figure 5 As shown, the conductive contact surface of the conductive roller 22 is provided with multiple conductive planes 222.

[0040] like Figure 5 As shown, the multiple conductive planes 222 are generally in the shape of regular polygons. When the intermittent conductive wire 6 moves up and down to make conductive contact, the multiple insulating parts 61 and conductive parts 62 on it will respectively contact the conductive planes 222 on the conductive contact surface.

[0041] like Figure 4 and Figure 5As shown, one side of the conductive roller 22 abuts against one side of the intermittent conductive wire 6, making the entire wire bundle of the intermittent conductive wire 6 arc-shaped. When the lifting needle 1 moves up and down, the pressure contact between the conductive roller 22 and the intermittent conductive wire 6 not only enables the insulating part 61 and the conductive part 62 to make full conductive contact, but also increases the contact friction between them, thereby effectively driving the conductive roller 22 to rotate.

[0042] like Figure 6 As shown, an insulating wheel frame 223 is mounted on the outside of the conductive roller 22, and the conductive roller 22 can rotate inside the insulating wheel frame 223.

[0043] like Figure 6 As shown, two spring plates 224 are installed between the insulating wheel frame 223 and the insulating plate 21. The U-shaped contact groove on the conductive roller 22 is composed of a conductive contact surface and two arc-shaped insulating inner walls 221 on both sides, which can effectively limit the position of the intermittent conductive wire 6, so that it can stably contact the conductive plane 222 when moving up and down, ensuring the accurate transmission of detection signals. The conductive roller 22 presses against the intermittent conductive wire 6 on one side, making the wire bundle arc-shaped, which also optimizes the contact effect. In addition, the two U-shaped spring plates 224 installed between the insulating wheel frame 223 and the insulating plate 21, with the spring rebound of the spring plates 224 and the pressing of the conductive roller 22, further ensure the positional stability of the intermittent conductive wire 6 in the U-shaped contact groove, preventing it from moving back, forth, left, and right unexpectedly, providing stable support for the needle lifting movement of the electronic jacquard machine, and effectively improving the overall reliability and stability of the detection mechanism.

[0044] like Figure 8 As shown, both spring sheets 224 are U-shaped.

[0045] like Figure 6 and Figure 9 As shown, the two spring plates 224 are connected between the insulating wheel frame 223 and the insulating plate 21 by connecting blocks 2241.

[0046] like Figure 9 As shown, the connecting blocks 2241 on the same side of the two spring plates 224 are staggered. During installation, they are connected by bolts on the connecting blocks 2241. The connection method of connecting blocks 2241 and bolts makes the installation process of spring plates 224 simple and precise. Installers can quickly position spring plates 224 based on the position of connecting blocks 2241 and tighten them with bolts, reducing installation and debugging time. At the same time, the staggered distribution of connecting blocks 2241 avoids interference between installation components, improves the convenience and reliability of mechanism installation, and helps to ensure that the needle position detection mechanism of electronic jacquard machine can be put into use efficiently and stably.

[0047] The working principle and usage process of this invention are as follows: During actual installation, the insulating plate 21 is fixed in a suitable position on the electronic jacquard machine to ensure that the detection switch 2 is stably positioned. The conductive roller 22, through the U-shaped spring plate 224 and the insulating wheel frame 223, is installed on one side of the insulating plate 21. When the electronic jacquard machine is working, the lifting needle 1 moves up and down according to the jacquard command. Through the through wire 5, it drives the intermittent conductive wire 6 and the heddle part 3 to move up and down synchronously. During the movement, the intermittent conductive wire 6 contacts the conductive contact surface on the conductive roller 22. The friction drives the conductive roller 22 to rotate. The insulating part 61 and the conductive part 62 on it will contact the conductive plane 222 on the surface of the conductive roller 22 according to different heights. The multiple conductive planes 222 are generally in the shape of a regular polygon. When the conductive part 62 contacts the conductive plane 222, the detection switch 2 is turned on; when the insulating part 61 contacts, the detection switch 2 is turned off. By monitoring the on and off states of the detection switch 2 at different heights, the real-time position of the lifting needle 1 can be accurately determined, thereby realizing the accurate detection of the position of the lifting needle of the electronic jacquard machine.

[0048] In actual operation, the on / off signal of the detection switch 2 is transmitted to the connected signal processing circuit. This circuit is equipped with a counter. When the detection switch 2 is turned on, the circuit receives the electrical signal and converts it into a digital signal "1", and the counter performs the corresponding counting operation. When the detection switch 2 is turned off, the signal is converted into a digital signal "0", and the counter also performs the corresponding counting change. For example, when the needle rises, the detection switch is turned on to increment the counter by 1, and when it falls, the signal is turned off to decrement the counter by 1. Combined with the preset needle movement range, the length of the conductive part 62 and the insulating part 61, and the detection accuracy, the real-time position of the needle 1 can be accurately calculated based on the counter value.

[0049] During complex jacquard operations, the needle 1 moves frequently and at high speed. This testing mechanism ensures accurate testing through multiple design features. Multiple conductive planes 222 on the conductive roller 22 are regular polygons that make orderly contact with the insulating part 61 and conductive part 62 of the intermittent conductive wire 6. Even when the needle moves rapidly, it can ensure accurate contact. The intermittent conductive wire 6 is arc-shaped under the pressure of the conductive roller 22, which increases the contact friction and prevents the intermittent conductive wire 6 from slipping on the conductive roller 22 when the needle moves at high speed. This ensures stable transmission of on / off signals. The U-shaped contact groove limits the position of the intermittent conductive wire 6 so that it does not deviate. The rebound of the spring plate 224 maintains the pressure on the intermittent conductive wire 6, avoiding poor contact that could lead to signal errors.

[0050] Through the coordinated operation of the insulating wheel frame 223, spring plate 224 and connecting block 2241, the insulating wheel frame 223 ensures the smooth rotation of the conductive roller 22, the elastic force of the spring plate 224 keeps the conductive roller 22 in stable contact pressure with the intermittent conductive wire 6, and the staggered distribution of the connecting block 2241 enhances the overall structural stability and reduces component displacement caused by vibration or external force interference.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A needle position detection mechanism for an electronic jacquard machine, comprising a needle (1) and a detection switch (2), characterized in that: The detection switch (2) includes an insulating plate (21) and a rotatable conductive roller (22) mounted on one side of the insulating plate (21). The bottom end of the lifting needle (1) is connected to a through wire (5), and the bottom end of the through wire (5) is connected to an intermittent conductive wire (6). The intermittent conductive wire (6) is formed by multiple insulating parts (61) and conductive parts (62) connected to each other at intervals. The intermittent conductive wire (6) is located on one side of the conductive roller (22). The bottom end of the intermittent conductive wire (6) is connected to a heddle part (3) that passes through the warp threads. The bottom end of the heddle part (3) is connected to a tension spring (4), and the bottom end of the tension spring (4) is connected to a mounting plate (7). The conductive contact surface of the conductive roller (22) is provided with multiple conductive planes (222), and the multiple conductive planes (222) are generally in the shape of a regular polygon. When the intermittent conductive line (6) moves up and down to make conductive contact, the multiple insulating parts (61) and conductive parts (62) on it will respectively contact the conductive planes (222) on the conductive contact surface. One side of the conductive roller (22) abuts against one side of the intermittent conductive wire (6), making the entire wire bundle of the intermittent conductive wire (6) arc-shaped. When the lifting needle moves up and down, the pressure contact between the conductive roller (22) and the intermittent conductive wire (6) can not only achieve full conductive contact between the insulating part (61) and the conductive part (62), but also increase the contact friction between them, thereby effectively driving the conductive roller (22) to rotate. When the lifting needle (1) moves up and down, it will drive the intermittent conductive wire (6) and the heddle section (3) to move up and down through the through wire (5). The intermittent conductive wire (6) will contact the conductive contact surface on the conductive roller (22) and drive the conductive roller (22) to rotate through friction. This allows the insulating part (61) and the conductive part (62) on the intermittent conductive wire (6) to contact the surface of the conductive roller (22) at different heights. When the conductive part (62) contacts, the detection switch (2) is turned on. When the insulating part (61) contacts, the detection switch (2) is turned off.

2. The electronic jacquard machine needle position detection mechanism according to claim 1, characterized in that: The conductive roller (22) is provided with an arc-shaped insulating inner wall (221). The conductive contact surface on the conductive roller (22) and the arc-shaped insulating inner wall (221) on both sides of it are generally in the form of a U-shaped contact groove. The intermittent conductive line (6) is located in the U-shaped contact groove.

3. The electronic jacquard machine needle position detection mechanism according to claim 1, characterized in that: An insulating wheel frame (223) is installed on the outside of the conductive roller (22), and the conductive roller (22) can rotate inside the insulating wheel frame (223).

4. The electronic jacquard machine needle position detection mechanism according to claim 3, characterized in that: Two spring plates (224) are installed together between the insulating wheel frame (223) and the insulating plate (21).

5. The electronic jacquard machine needle position detection mechanism according to claim 4, characterized in that: Both spring sheets (224) are U-shaped.

6. The electronic jacquard machine needle position detection mechanism according to claim 4, characterized in that: The two spring plates (224) are respectively connected between the insulating wheel frame (223) and the insulating plate (21) by connecting blocks (2241).

7. The electronic jacquard machine needle position detection mechanism according to claim 6, characterized in that: The connecting blocks (2241) on the same side of the two spring sheets (224) are staggered and connected by bolts on the connecting blocks (2241) during installation.

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