JPH0616935Y2 - Warp selection control device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp selection control device for a loom, and more particularly to an electronic jacquard control device.

[0002]

2. Description of the Related Art Various types of warp selection mechanisms for looms have been developed to date. As one of the forms, for example, one warp and one warp needle are connected via a thread, and the warp needle is selectively engaged and driven by a lifting hook mechanism to open the upper half opening of the warp. There is also a mechanism for forming a lower half opening by directly driving an unengaged vertical needle by its own supporting guide mechanism, thereby selectively forming a complete punching opening. An electromagnet is generally used to engage or disengage the vertical needle, but in consideration of its electric energy consumption, in recent electronic jacquards, the hook is moved from the standby state to the vertical needle engaging position. The electromagnet is energized for the moving time of. However, even with such an electromagnet energizing method, it is necessary to continue energizing the solenoid during the vertical needle operation time until the hook is completely engaged with the vertical needle. The slower the rotation of, the longer the energization time, which leads to the heat generation and power consumption increase of the solenoid itself. As described above, in the solenoid drive system, the problem of electric energy consumption that energization takes a certain time rather than an instant becomes a very serious problem when the size of the electronic jacquard increases. Further, the same problem occurs in the use of the electronic jacquard at a low rotation like the conventional power loom. Further, a permanent magnet is used at a position on the hook element facing the solenoid core, and the attraction force of the magnetic field of the permanent magnet always keeps the hook engaged or disengaged to repel the permanent magnet to the solenoid core. Although there is a method of supplying the exciting current in the other direction to bring it to another state, it is still incomplete in terms of positive utilization of the permanent magnet.

Particularly, in the above-mentioned electronic jacquard, when the mechanical operation of the loom is stopped without turning off the main power source during the selection operation of the hook, that is, during the energization of the solenoid, the stop is released by the solenoid. , The hook is fully engaged with the vertical needle (released position in reverse mode)
The current flows until it reaches a certain level, and this not only consumes a large amount of power, but there is even a risk of disconnection due to heat generation. Therefore, the solenoid energizing circuit must be provided with a complicated relay circuit for detecting such a temporary stop of the mechanical operation, cutting off the energization, and reenergizing when the mechanical operation is restarted. I won't.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned power consumption problem of the solenoid, the present invention aims to solve the problems described above.
By energizing the solenoid with only one pulse of electricity, the hook selection operation can be performed completely to reduce power consumption, heat generation of the solenoid can be minimized, and the electronic jacquard can be made larger. The present invention intends to provide a warp selection control device with the simple mechanism described above.

[0005]

In order to achieve the above object, the warp selection control device of the present invention drives a plurality of vertical needles, the lower ends of which are connected to one warp through a thread, through a lifting cycle drive. And a vertical needle support position for preventing a predetermined range from the upper end of each vertical needle from being immersed in the vertical needle passage and the vertical needle support position. Is allowed to slide between the vertical needles and the vertical needle passages at a position which is relatively higher than the vertical needle by a predetermined distance. And a vertical needle guide mechanism that forms a cam surface that projects to the side, and the vertical needle guide mechanism is disposed above the vertical needle guide mechanism and is vertically moved in a phase opposite to the vertical needle guide mechanism. Hook lever with multiple permanent magnets corresponding to multiple vertical needles And a magnetic core around which a solenoid is wound is provided at a fixed position in the housing facing the permanent magnet of each hook lever, and the hook portion of the vertical needle is provided at the lower end of each hook lever. And a movable hook mechanism having a cam follower surface and a hook portion for engaging with the cam surface, respectively.

According to another aspect of the present invention, the permanent magnet of the hook lever is such that the SN both polar surfaces are opposed to the magnetic core, and the excitation of the magnetic core by the solenoid attracts the polar surface by the permanent magnet. The magnetic field of the magnetic core at that time cancels the closed magnetic circuit magnetic field and instantaneously generates an electromagnetic force sufficient to separate the permanent magnet from the magnetic core, and the lifting housing further includes the hook lever after the separation. It is equipped with a return spring having sufficient strength to bring the vertical needle into the engagement angle position.

[0007]

According to the above construction, the hook lever is repulsively driven by the solenoid energization of the magnetic core whose permanent magnets face each other near the uppermost approaching position of the vertical lever guide mechanism and the movable hook mechanism due to the lowering of the movable hook mechanism. When it is pulled, it becomes an angle where its hook portion engages with the hook portion of the corresponding vertical needle, and when the permanent magnet is attracted to the corresponding magnetic core, it becomes an angular position where the engagement is released. Yes, the vertical needle, when both mechanisms try to reach the final approach position positively,
The cam follower surface of the hook lever stopped at the engagement angle position is brought into sliding contact with its own cam surface to push the hook lever toward the engagement release angle position.

As a result, the warp needles engaged with the hooks rise to form the upper half openings of the corresponding warp threads, and the vertical needles not engaged with the hooks simultaneously descend to form the lower half openings of the corresponding warp threads. To do.

Further, according to the present invention, since the permanent magnet forms a complete closed magnetic path with the magnetic core attracted to each other at the disengaged position of the hook lever, even if the strength of the magnet is weak. It is possible to obtain a certain adsorption holding force, which is momentarily repelled and separated by solenoid excitation, and even if the exciting current is cut off immediately, the attractive force of the separated permanent magnet is extremely small. It is clear that the engagement angle position is brought more quickly.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a heavy-breakdown front view showing the basic construction of an embodiment of the present invention, and FIG. 2 is a side view thereof. In FIG. 1, 1 is a movable hook mechanism, 2 is a vertical needle guide mechanism, 3 is a threading thread whose lower end is connected to each one warp thread, and this configuration is as shown in FIGS. Is also present in. The main body of the vertical needle guide mechanism 2 comprises a slide guide 5 having a plurality of vertical needle passages 4, and a plurality of vertical needles 6 inserted into these passages 4 have an upper end portion 7 having a predetermined length and a vertical needle passage. Fig. 2
And has a blocking edge 8 as shown in FIG. 3 and slides in the vertical needle passage 4 between the retracting prevention position (vertical needle supporting position) and a position protruding upward from the vertical needle passage by a predetermined distance. You can do it. In the upper end portion 7 of the vertical needle, there is a hook portion 9 projecting downward and a cam surface 10 projecting to the same side at the upper end.

The elevating housing 11 forming the main body of the movable hook mechanism 1 is driven up and down in a phase opposite to that of the slide guide 5 described above, and inside the housing 11, a plurality of vertical needles 6 in the vertical needle guide mechanism 2 are installed. A plurality of hook levers 12 with permanent magnets are swingably supported by a support shaft 13 at corresponding positions. Inside the housing 11, a plurality of magnetic cores 16 each having a solenoid 15 wound therein are arranged at fixed positions facing the permanent magnets 14 (FIGS. 3 and 4) mounted on the upper portions of the hook levers 12. At the lower end of each hook lever 12, the hook 9 of the vertical needle 6 described above is provided.
A cam follower surface 18 corresponding to the hook portion 17 and the cam surface 10 that engage with is formed. Furthermore, the support shaft 13
A return spring 19 for bringing each hook lever 12 to the engagement position with the vertical needle 6 is disposed near (in this case, immediately above).

The state of the apparatus shown in FIG. 1 and FIG.
This is a state at the time of reset in which the engagement between the hook lever 12 and the hook lever 12 is completely released, that is, when the slide guide 5 and the elevating housing 11 reach the final approach position. It should also be noted that the right half of FIG. 1 corresponds to the left side view of FIG. 2, and the left half corresponds to the left side view of FIG. That is, in the state shown in FIGS. 1 and 2, the tip cam surface 10 of the vertical needle 6 completely slides and presses the cam follower surface 18 of the hook lever 12 to the apex to “open” or not open the hook lever 12. This is brought to the engagement angular position. When the housing 11 rises from this state and the slide guide 5 descends, the hook portion 9 of the vertical needle again comes to the position corresponding to the hook portion 17, and at this time, one vertical needle 6a (here,
6 on the left side of FIG. 3 and FIG.
a, the right side, that is, the vertical needle on the back side is 6b) is maintained in the open position as it is, and the solenoid 15 on the hook lever 12 side corresponding to the other vertical needle 6b is energized. , This is a permanent magnet 1 in the core 16.
4 is generated, and the hook lever 12 in the "open" position is attracted to both poles of the horseshoe-shaped core 16.
The SN poles of the upper permanent magnet 14 are separated, and at the same time, the exciting current to the solenoid 15 is cut off. In this state, however, the return spring 19 is stronger than the attractive force of the permanent magnet.
Since the return elastic force due to is stronger, the hook lever 12 rotates as it is to the engagement angle position with the vertical needle 6b as shown in FIG. At this moment, there is some margin in the up-down direction between the hook portion 9 of the vertical needle 6b and the hook portion 17 of the hook lever 12, but the hook portion 9 and the hook portion 9 and the hook are due to the separating operation between the housing and the elevating slide. The portion 17 is immediately brought into a close engagement state, and thereafter, the vertical needle 6b is hereafter
The vertical needle 6a, which is not engaged, descends while being supported by the slide guide 5 as it is, and finally occupies the opening forming position as shown in FIG.

After the warp shed is formed in this way and shuttle scanning is performed, the elevating slide 5 and the housing 11 enter the approaching stroke, and after the state shown in FIG. The hook portion 9 is disengaged upward from the hook portion 17, and eventually the tip cam surface 10 pushes the corresponding cam follower surface 18 of the hook lever 12 so that the same angle as the vertical needle 6a side (hook lever "open" or non-engagement). Then, the permanent magnet 14 is pressed against the corresponding magnetic core 16 to be attracted and held, and the reset state as shown in FIG. 2 is obtained.

[0014]

As described above, according to the present invention, since each hook lever is repulsively driven by using one solenoid, the complete selection control operation of each warp is completed. And it can be done reliably. In order to perform a complete and efficient selection control operation, the hook lever has a magnet structure composed of a cylindrical permanent magnet and a magnetic pole plate to eliminate malfunctions due to magnetic unevenness of each hook lever, and to prevent the magnets of the electronic solenoid from being magnetized. A completely closed loop magnetic circuit can be formed between and. Therefore, according to the device of the present invention, it is possible to construct an accurate and energy-saving electronic jacquard that can be economically manufactured by an extremely simple mechanism.

[Brief description of drawings]

FIG. 1 is a front view of an essential part of an embodiment of the present invention, and is a view including a cross section AA of FIG. 2 in a left half part.

2 is a side view of the device of FIG. 1. FIG.

FIG. 3 is a side sectional view showing a state when hooks are engaged with the side plate of FIG. 2 removed.

FIG. 4 is a side sectional view similar to FIG. 3, showing the opening formation.

[Explanation of symbols]

 1 Movable Hook Mechanism 2 Vertical Needle Guide Mechanism 3 Threading 4 Vertical Needle Passage 5 Slide Guide 6 Vertical Needle 7 Vertical Needle 7 Upper End of Vertical Needle 8 Blocking Edge 9 Hook 10 Cam Surface 11 Lifting Housing 12 Hook Lever 13 Spindle 14 Permanent Magnet 15 Solenoid 16 Magnetic core 17 Hook part 18 Cam follower surface 19 Return spring

Claims (2)

[Scope of utility model registration request] 1. A plurality of vertical needles each having a lower end connected to one warp thread through a thread, are inserted into corresponding vertical needle passages of a slide guide driven by a lifting cycle, and an upper end of each vertical needle. Each vertical needle between a vertical needle support position that prevents a predetermined range from entering the vertical needle passage and a position at which each vertical needle projects relatively higher than the support position by a predetermined distance. And a vertical needle passage, and a vertical needle guide mechanism formed with a hook portion protruding downward and a cam surface protruding laterally at the upper end of the vertical needle. , A plurality of hook levers with permanent magnets can be rocked corresponding to the plurality of vertical needles in an elevating housing arranged above the vertical needle guide mechanism and driven up and down in a phase opposite to that of the mechanism. Equipped with the housing facing the permanent magnet of each hook lever A magnetic core around which a solenoid is wound is provided at a fixed position inside, and a hook portion and a cam follower surface for engaging with the hook portion and cam surface of the vertical needle are formed at the lower end portion of each hook lever. Since the hook lever is provided with a movable hook mechanism, the permanent magnet of the hook lever is repulsively driven by the solenoid in the vicinity of the final approach position of the vertical lever guide mechanism and the movable hook mechanism due to the lowering of the movable hook mechanism. When the hooks of the permanent magnets are engaged with the hooks of the corresponding vertical needles, the hooks are in an angular position that releases the engagement when the permanent magnets are attracted to the corresponding magnetic cores. When the two mechanisms reach the closest position, the vertical needle causes its cam surface to act on the cam follower surface of the hook lever still stopped at the engaging angle position to cause the hook lever to move. Warp selection controller, characterized in that it is intended to push toward the disengaged angular position. 2. The permanent magnet of the hook lever has SN pole surfaces facing the magnetic core, and the excitation of the magnetic core by the solenoid flows into the magnetic core when the pole surface is attracted by the permanent magnet. The magnetic field of the closed magnetic circuit is canceled to instantaneously generate an electromagnetic force sufficient to separate the permanent magnet from the magnetic core, and the lift lever is further engaged with the vertical needle on the lifting housing. A device according to claim 1, characterized in that it is equipped with a return spring of sufficient strength to bring it into the angular position.