WO2002079552A1

WO2002079552A1 - A lifting heald control mechanism for a jaquard

Info

Publication number: WO2002079552A1
Application number: PCT/CN2002/000228
Authority: WO
Inventors: Hailin Zhang
Original assignee: Hailin Zhang
Priority date: 2001-04-02
Filing date: 2002-04-02
Publication date: 2002-10-10
Also published as: CN2476569Y

Abstract

This invention relates to a lifting heald control mechanism for a Jaquard comprising a core, an armature, a coil, a spring, a upper frame and a rod, characterized in that, the inside of a hook has a tongue which projects upward in a inclined direction, a hanger and a rod are fixed on the upper end of the needle, a projection is fixed on the side of the rod, an upper frame is connected to an extension spring connected to a board, or a piezoelectric element is mounted on the upper frame, and the hook is connected to a piezoelectric element. The mechanism according to the invention is a simple construction with a small size. It consumes less power, and is convenient to operate exactly and reliably at a high speed.

Description

TECHNICAL FIELD

The invention relates to a jacquard control device of a jacquard machine, which is suitable for an electronic jacquard machine with various opening mechanisms. Background technique

In the movement of the opening mechanism of the jacquard machine, the vertical needle is hooked or not hooked, and the vertical needle is raised or lowered to form a shed, which is the function of the lifting control device. The traditional jacquard machine is mechanical needle selection, and the computer-controlled electromagnet needle selection is electronic. There are many patents and products around the electronic needle selection function. The CN2271538Y patent provides a direct connection between the vertical needle and the armature, which is directly lifted by the suction force of the armature, and a pendulum mechanism and a pawl are provided to eliminate the hysteresis. The problem is that the suction force of the electromagnet with large power consumption is also difficult to meet the vertical needle lifting force (1.2daN). The CN1215770A patent provides an electromagnet-operated jacquard needle for lifting and lowering and swinging a vertical hook to overcome the above problems. The vertical needle is lifted or lowered by the jacquard opening mechanism. Although the vertical needle lifting capacity is large, the patent has the problem of adding a small opening mechanism and a lateral movement mechanism. The electronic jacquard machine produced by the British company Bonas is world-famous. Its structure is that the core of the electromagnet acts on the steel vertical needle. The suction force generated by the electromagnet is attracted to the hook. The electromagnet is not energized and the vertical hook is not attracted to the hook. The structure is very simple. The problem is the electromagnet. The power consumption is relatively large, because the suction force of the electromagnet is inversely proportional to the air gap S ^{2 of} its suction surface. Therefore, its control circuit contains a timing circuit. If the electromagnet is energized for more than one minute, the timing circuit will disconnect all electromagnets, which is sufficient to indicate that the electromagnet consumes large power. The DE4028390A1 patent provides a Jack-type control device, which uses an angled two-armed joystick that rotates around a rotation axis. One arm supports the armature and the other arm is a hook. The armature and the core are closed by the ejector lever when it is raised to the highest position. . There are two types of control provided. One is the hook that hooks the vertical needle when the armature and the core are closed. The problem is that the tension of the spring always tries to open the armature and the core. The vertical needle occasionally moves upwards. 2 -3, the hook is higher than the hook, the tension of the spring forces the armature and the core to open, which shows poor stability. The other is the hook that does not hook the vertical needle when the armature and the core are closed. Its structure is simple and reasonable. It has a strong ability to pull up, the power required by the electromagnet is small, and the problem is that the hysteresis causes malfunction. CN1189547A is to provide two joystick solutions for hysteresis-induced misoperation to reduce the abrasion of the opposite surface of the armature and the core and add a thin layer of non-magnetic material about 10 um on the opposite surface of the core and the armature. The problem is that it can not effectively overcome the hysteresis problem, because hysteresis is a physical property of magnetic materials, and the thin layer of non-magnetic material increases the gap between the armature and the core, which reduces the hysteresis attraction and also reduces the attraction force when the electromagnet is energized. Insufficient suction can also cause malfunction. Besides, armature and iron core After a single hit, a thin layer of non-magnetic material will also thin or fall off. In this way, the hysteresis still increases and causes malfunction. Swiss

Stubli is also a well-known manufacturer of electronic jacquard machines. Its structural principle is similar to DE4028390A1, with two differences, one is that it can rotate around the axis of rotation is a straight arm joystick, and the other is to push the armature and core to close is the tongue on the vertical hook Spring pushes the hook. In order to overcome the hysteresis, the tension of the spring must be increased, and the suction of the electromagnet must be increased. Compared with the electromagnet that directly attracts the armature movement, it still has a particularly low energy consumption (3.5 w / piece).

To sum up, many known technologies, especially products, can meet the accurate reliability and high-speed operation of the function, but it cannot be ignored that the energy consumption of the electromagnets is large, and its economics are rarely mentioned. Take the electromagnet used in the jacquard control device of the jacquard machine as little as over one thousand (1344) and as many as tens of thousands. Based on 3.5w / pc, a 1344-pin jacquard DC stabilized power supply (for power supply magnets) . Powered by a 50% pin electromagnet, the power of the regulated power supply needs 2500w, high power consumption, and high production costs. Object of the invention

The object of the present invention is to provide a lifting control device for a jacquard machine, which uses a protruding head component or a piezoelectric element. The device has a simple structure, small size, accurate operation, and extremely low power consumption. Technical solutions

In order to achieve the above object, the present invention adopts the following technical measures. The device is composed of an iron core, a coil, an armature, a spring, an upper frame, and a vertical needle. A rotating shaft is installed on the iron core. Electromagnet. The iron core of the electromagnet is fixed on the upper frame of the opening mechanism or the upper frame of the frame, and the hook fixed on the non-suction surface of the armature. The angle between the hook and the armature is less than 90 °. The armature is opened to the limit point by the spring tension and the core is opened, and the hook lever is vertically downward. It is characterized in that there is a tongue spring protruding obliquely upwards on the inside of the hook lever, a hook and a vertical rod are arranged on the upper end of the vertical needle, a protrusion is arranged on one side of the vertical rod, the upper frame is connected to the tension spring, and the tension spring and the plate Connect, or fix the piezoelectric element on the upper frame, and the hook is bonded to the piezoelectric element. The needle bar of the vertical needle can move up and down through the vertical pin hole of the pallet, and the hook and the vertical rod are supported on the pallet. The hooks of the hooks and the hooks of the hooks engage in a vertical motion line. Its function is: the pallet rises to the highest position, and the top of the hook pushes the tongue spring on the hook to turn the hook to the position where the hook cannot reach the hook and close the armature and the core. The solenoid coil is energized, the armature remains closed with the core, and when the pallet moves downward until the hook is lower than the hook, the coil is powered off, and the armature is still attracted by the hysteresis and closed with the core due to the small spring tension. Effectively hit the back of the hook to force the armature and core to open to the limit point, to eliminate the effect of hysteresis, or to power up the piezoelectric element, the hook does not hook, the piezoelectric element is not powered, the hook catches the hook.

Compared with the prior art, the present invention has the following advantages and effects: simple structure, small size, convenient operation, The action is accurate and reliable, especially the energy consumption of the electromagnet is extremely small, which is suitable for high-speed operation. The power supply voltage of the electromagnet is 4.3V, the current is 12raA, and the energy consumption of the electromagnet is only 0.05 w / piece, which is one-seventh of 3.5 w / piece. Piezoelectric power consumption is also small. BRIEF DESCRIPTION OF THE DRAWINGS

In order to further illustrate the technical content of the present invention, the present invention is described in further detail below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a lifting control device of a jacquard machine.

FIG. 2 is a schematic structural diagram of a lifting control device of a jacquard machine.

Fig. 3 is a schematic diagram of a state where no voltage is applied to the hoisting control device operated by the piezoelectric element.

Fig. 4 is a schematic diagram of a voltage application state of the integrated control device operated by the piezoelectric element. detailed description

According to FIG. 1, the structure is composed of a core 1, a coil 2, an armature 3, and a spring 4. A rotating shaft 5 is mounted on the core 1, and the armature 3 can rotate around the shaft 5 to form a snap-in electromagnetic with the core 1 coil 2 and the spring 4. Iron, the iron core 1 of the electromagnet is fixed on the upper frame of the opening mechanism or the upper frame of the frame, the hook 6 fixed on the non-suction surface of the armature 3, and the angle between the hook 6 and the armature 3 is less than 90 °. The armature 3 is opened by the tension of the spring 4 and the core 1 is opened to the limit point 7, and the hook 6 is vertically downward. A tongue spring 16 protruding obliquely upward is provided on the inner side of the hook 6 rod. A hook 11 and a rod 12 are mounted on the upper end of the vertical needle 9. The rod 12 is higher than the hook 11. A protruding head 15 is mounted on the side of the vertical rod 12. The vertical bar 12 can also be mounted on the pallet 10. The needle bar 13 of the vertical needle 9 can move up and down through the vertical pin hole 14 of the supporting plate 10, and the hook 11 and the vertical rod 12 are supported on the supporting plate 10. The hooks of the hook 11 and the hooks of the hook 6 are engaged with each other in a vertical motion line. The supporting plate 10 is raised to the highest position, and the top end of the hook 11 pushes the tongue spring 16 on the hook 6 so that the hook 6 is turned to a position where the hook 11 cannot be hooked and the armature 3 and the core 1 are closed. That is, the hook 6 leaves the track A area of the vertical movement of the hook 11. Its back enters the area B of the locus 15 of the vertical movement of the head 15. When the solenoid 2 is energized, the armature 3 remains closed with the core 1, and when the pallet 10 moves downward to the hook 11 lower than the hook 6, the coil 2 is powered off, and the armature 3 is still attracted by the hysteresis due to the small tension of the spring 4. It is closed with the iron core 1, and the downwardly-moving protruding head 15 effectively hits the back of the hook 6 to force the armature 3 and the iron core 1 to open to the limit point 7, so as to eliminate the influence of the hysteresis. After the vertical needle 9 descends to the lowest point with the pallet 10, it rises again to the highest position. The electromagnet coil 2 is not energized. The electromagnet has no hysteresis suction. The iron core 1 does not attract the armature 3. When the pallet 10 is lowered, the vertical needle 9 gradually descends with the pallet 10. The armature 3 is only pushed by the armature 3 by the spring 4. The tension of the shaft rotation, when the hook 11 is still higher than the hook 6, The armature 3 is opened to the limit point 7, the hook 11 is slightly lowered and then caught by the hook 6 entering the A area. The vertical needle 9 stays in the high position, and the pallet 10 is lowered to the lowest position. The lifting control device completes the lifting function.

According to FIG. 2, the structure is slightly different from that in FIG. 1: The hook 6 is connected to the rotating shaft 5, the rotating shaft 5 is connected to the upper frame 8, the armature 3 is connected to the tie rod 18, the tie rod 18 has a protrusion 23, and the tie rod 18 moves up and down to limit the position. When the supporting plate 10 is raised to the highest position, the elastic vertical rod 12 pushes the pull rod 18 upward to close the armature 3 and the core 1 while pushing the hook 6—the arm makes the hook 6 out of the vertical movement track A area of the hook 11. The tension rod 18 is lowered to the limit point 7 by the tension of the spring 4. The upper frame 8 is fixed to the tension spring 20, and the tension spring 20 is connected to the plate 17. The tension spring 20 fixed to the upper frame pulls the plate 17 and places it on the pull armature. Above the tie rod bump 23, the lower end of the plate 17 is connected to the steel wire 21, the steel wire 21 passes through the hole 19 of the pallet 10, and an elastic member 22 is fixed at the lower end of the wire 21, and its function is: The armature 3 whose suction force is still sucked by the iron core. When the supporting plate 10 is lowered to the lowest position, the supporting plate 10 pulls the plate 17 and hits the projection 23 of the tie rod 18 when the armature 3 and the core are closed. To eliminate the effect of hysteresis. Others are the same as those in FIG. 1.

According to FIG. 3 and FIG. 4, the pull-up control device operated by a piezoelectric element includes a piezoelectric element 30 and a hook 6. The hook 6 may be an extension hook of the piezoelectric element 30 or an elastic material as a hook 6. The energized end of the piezoelectric element 30 is fixed on the upper frame 8, the hook 6 is firmly bonded to the piezoelectric element 30, the hook 6 is vertically downward, the upper end of the vertical pin 9 is provided with a hook 11, and the lower end of the vertical pin 9 is passed through the bracket The pin holes 14 and the hooks 11 of the board 10 are supported on the tray 10. The hooks of the hooks 11 and the hooks of the hooks 6 engage in a vertical line, and their functions are as follows: When no voltage is applied to the piezoelectric element 30, the hooks 6 hook the hooks 11 when the hooks 11 are slightly lowered. When a voltage is applied to the piezoelectric element 30, the piezoelectric element 30 generates a bending displacement, and the hook 6 cannot reach the hook 11 when the hook 11 is lowered. The supporting plate 10 rises from the lowest position to the highest position, the piezoelectric element 30 is not applied with voltage, and the hook 11 of the vertical pin 9 squeezes the hook 6 into the upper side of the hook 6 and the hook 6 returns to its original state. When the pallet 9 is lowered, the hook 6 hooks the hook 11 and the vertical needle 9 stays in a high position. The pallet 10 is lowered to the lowest position. The pallet 30 rises from a low position to a high position and then descends. The piezoelectric element 30 applies a voltage, and the piezoelectric element 30 generates a bending displacement. The hook 6 cannot reach the hook 11, and the vertical pin 9 is lowered to the lowest position along with the pallet 10. The elevating control device operated by the piezoelectric element 30 completes the elevating function.

Claims

Claim

1. A lifting control device for a jacquard machine, which is composed of an armature (3), a spring (4), an upper frame (8), and a vertical pin (9), and is characterized in that the inside of the hook (6) protrudes diagonally upward The tongue spring (16) is equipped with a hook (11) and a vertical rod (12) on the upper end of the vertical needle (9), and a protruding head (15) is installed on the side of the vertical rod (12). The vertical rod 12 can also be installed On the supporting plate 10, the upper frame (8) is connected to the tension spring (20), the tension spring (20) is connected to the plate (17), or the piezoelectric element (30) is fixed on the upper frame (8), and the hook ( 6) Connected to the piezoelectric element (30).

2. A lifting control device for a jacquard machine according to claim 1, characterized in that the lower end of the plate (7) is connected to the steel wire (21), and the steel wire (21) passes through the hole (19) of the pallet (10) The elastic member (22) is fixed at the lower end of the wire (21). '

3. A lifting control device for a jacquard machine according to claim 1, characterized in that the lower end needle bar (13) of the vertical needle (9) passes through the needle hole (14) of the pallet (10), and the hook ( 11) It is supported on the supporting plate (10), and the hook of the hook (11) and the hook (6) engage in a vertical line.