JP3004284B2 - Horizontal needle control device for Jacquard machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a horizontal needle control device for a Jacquard machine.

(Prior Art) In order to selectively push a horizontal needle of a jacquard machine based on woven pattern information, there are many apparatuses using a small solenoid (for example, Japanese Patent Laid-Open No. 58-186628, Japanese Patent Publication No. 60−36
No. 493, etc.).

The actuator shown in FIG. 3 is proposed as Japanese Patent Publication No. Sho 60-36493, and swings about a fulcrum shaft 2 in order to selectively push a horizontal needle (push rod) 1. 3
The actuator 3 changes the direction of an electric current flowing through a coil 5 wound around the iron core 4 so that the iron 4
Of the armature 3 by utilizing the attraction and repulsion between the magnetic frames 6 formed of permanent magnets or the like.
The switching operation is performed between the positions.

The moving frame 7 to which the actuators 3 are attached moves in the stroke direction of the horizontal needle 1. At this time, if the actuator 3 faces the horizontal needle 1, the horizontal needle 1 is pushed and the horizontal needle 1 is moved. If it is off,
The horizontal needle 1 is not pressed and is stationary.

By controlling the movement of the horizontal needle 1 in this way,
A vertical needle (not shown) linked to the horizontal needle 1 is controlled to form an opening (hip) corresponding to the woven pattern.

(Problems to be Solved by the Invention) In this case, instead of directly pushing the horizontal needle 1 by the solenoid, the magnetic force merely switches the actuator 3, and the driving force of the moving frame 7 is required to move the horizontal needle 1. Since the solenoid is used, the driving force required for the solenoid composed of the iron core 4 and the coil 5 is small, and therefore, the solenoid can be small.

However, only one of the magnetic poles generated in the iron core 4 of the solenoid contributes to the switching of the actuator 3, and the magnetic force on the fulcrum shaft side is irrelevant to the attraction to the magnetic frame 6. For this reason, the generated magnetic force is not used as effectively as possible, and even if there is no problem in normal switching, the actuator 3 may malfunction due to vibration of the jacquard or the like.

Further, in the structure in which the coil 5 is directly wound around the actuator 3 as described above, it is necessary to make the iron core 4 around which the coil 5 is wound thin in order to prevent interference between a number of adjacent actuators. When the impact is repeatedly applied when the horizontal needle (push rod) is pushed, it is easily damaged, and the lead wire connected to the coil 5 is easily broken due to the repetition of the bending action.

 The present invention aims to solve these problems.

(Means for Achieving the Object) Accordingly, the present invention provides an actuator capable of swinging about a fulcrum shaft between two positions of pressing a horizontal needle and a position not pressing the horizontal needle corresponding to the horizontal needle of a jacquard. And a solenoid having a central magnetic pole portion and both magnetic pole portions, and disposed between these magnetic pole portions,
Two magnetized yoke parts attached to the rotation base end of the actuator, a moving frame that holds the actuator and the solenoid and reciprocates in the direction of the horizontal needle, and selectively attracts the yoke part to the magnetic pole part And a control circuit for reversibly supplying a current to the solenoid so that the switching operation of the actuator is completed, the central magnetic pole portion and any side magnetic pole portion of the solenoid, and two yoke portions are provided. To form a closed circuit.

(Operation) The polarities of the central magnetic pole portion and the magnetic pole portions on both sides are reversed depending on the direction of energization to the solenoid. Therefore, a repulsion and an attraction force act on the yoke portion disposed therebetween in accordance with the energization direction.

As a result, the actuator is selectively switched between the position where the horizontal needle is pushed and the position where it is not pushed, with the fulcrum axis as the center.

(Example) An example shown in FIGS. 1 and 2 will be described.

The moving frame 12 is supported on the fixed frame 10 via a plurality of sliding guide shafts 11 so as to be freely slidable in the left-right direction in the drawing. A connecting rod 14 is connected to a pin boss 13 projecting above and below the moving frame 12, and reciprocates in synchronization with the rotation of the loom.
As a result, the moving frame 12 reciprocates.

A plurality of solenoids 15 and actuators 16 are arranged in the moving frame 12 in the vertical direction corresponding to the number of the horizontal needles 1.

As shown in FIG. 2, each solenoid 15 attached to the substrate 19 of the moving frame 12 has a central magnetic pole portion 17a and a lateral magnetic pole portion 17a.
b, 17c and the coil 18, the central magnetic pole portion 17a and the lateral magnetic pole portions 17b, 17c
And the polarity is inverted. That is, the central magnetic pole portion 17a has an N pole and the lateral magnetic pole portions 17b and 17c have an S pole, depending on the direction of energization, or conversely, the central magnetic pole portion 17a has an S pole and the side magnetic pole portions 17b and 17c
Are magnetized to the N pole.

In addition, the central magnetic pole portion is provided at a rotation base end of an operating member 16 that swings about a fulcrum shaft 20 corresponding to the solenoid 15.
Yoke portions 22a, 22b are provided so as to be located between 17a and the side magnetic pole portions 17b, 17c. One of the yoke portions 22a, 22b is an N pole and the other is an S pole by the permanent magnet 23 disposed therebetween. It is magnetized to be a pole.

The pushing end of the actuator 16 is formed in a wedge shape, swings between non-magnetic receiving plates 24 arranged vertically, and is horizontal when in contact with the lower receiving plate 24 as shown in the figure. When the needle 1 faces the push rod 21 corresponding to the needle 1 and turns upward, the needle 1 comes off the push rod 21.

The receiving plate 24 functions as a backup plate when the operator 16 presses the horizontal needle 1 and supports a vertical component force applied to the operator 16.

The push rod 21 corresponding to the horizontal needle 1 penetrates freely through a guide hole 25 formed in the movable frame 12 and the fixed frame 10, and the horizontal needle 1 comes into contact with the head 21a. In order to prevent the push rod 21 from coming off, the holding frame 26 is
The horizontal needle 1 is inserted into a guide hole 27 formed in the holding frame 26.

The end of the horizontal needle 1 opposite to the push rod 21 is urged toward the push rod 21 by a spring 28 on the jacquard side. The vertical needle 30 is locked to the horizontal needle 1, and the horizontal needle 1 is locked.
Is selectively engaged with a knife (not shown).

The configuration is as described above, and the operation will be described next.

In the state shown in FIG. 1, the moving frame 12 is located farthest from the jacquard, and immediately before this, each solenoid 15 is selectively excited by a signal based on woven pattern information from a control circuit (not shown).

As shown in FIG. 2, the yoke portion 22a above the actuator 16 (the same applies hereinafter in the drawing) has an N pole,
Assuming that 2b is magnetized to the south pole, the central magnetic pole portion 17a
When the solenoid 15 is energized so that the side magnetic pole portions 17b and 17c become S poles at the poles, the actuator 16 is pushed around the fulcrum shaft 20 by the repulsive force and the attraction force received by each of the yoke portions 22a and 22b. The switching operation is performed to the lower position facing 21.

Of course, when the solenoid 15 is energized from the opposite direction, the polarities generated in the center magnetic pole portion 17a and the side magnetic pole portions 17b, 17c are reversed, and the actuator 16 is switched to the opposite upper position.

The moving frame 12 is pulled by the connecting rod 14 and moves toward the jacquard. During this time, the power supply to the solenoid 15 is cut off by the timer of the control circuit. However, the actuator 16 is attracted to each magnetic pole portion of the solenoid 15 by the action of the yoke portions 22a and 22b magnetized by the permanent magnet 23, and the position does not change even when the power is cut off.

When the operator 16 comes to a position where it comes into contact with the push rod 21, the push rod 21 facing the operator 16 located on the lower side starts to be pushed, and accordingly, the horizontal needle 1 also starts moving.

However, when the actuator 16 is located on the upper side, the push rod 21 does not move even if the moving frame 12 moves because the push rod 21 does not contact the push rod 21, and the horizontal needle 1 is still at the same position.

When the horizontal needle 1 is selectively pressed by a certain amount in this manner,
Thereafter, the moving frame 12 starts to return to the original position, and returns to the state shown in FIG.

Depending on whether the horizontal needle 1 has moved or not, the vertical needles 30 engaged with the horizontal needles 1 are selectively engaged with a knife (not shown), and an opening (hip) corresponding to the woven pattern is formed.

By the way, regarding the movement of the actuator 16 when the solenoid 15 is excited, when the position of the actuator 16 is switched, each of the yoke portions 22a, 22b has the central magnetic pole portion 17a and the side magnetic pole portions 17b, 17c.
, The repulsive force and the attracting force are simultaneously received, respectively. Therefore, unlike the conventional method (FIG. 3) in which only one of the magnetic forces generated by the solenoid 15 is used, the magnetic force generated by the solenoid 15 is maximally used effectively, and the suction force is sufficiently strong. Force is generated.

When the switching operation is completed, the solenoid 15
A central magnetic pole portion 17a and any of the lateral magnetic pole portions 17b, 17c,
Since the magnetic field path of the closed circuit is formed with the yoke portions 22a and 22b of the actuator 16, there is no leakage of magnetic flux, and no influence of the magnetic force on the adjacent actuator 16 occurs. In addition, the yoke section
Since the attraction force of the permanent magnet 23 also acts sufficiently through the coils 22a and 22b, even if no current flows through the coil 18, a malfunction such as the actuator 16 being separated due to vibration or the like does not occur.

Since the coil 18 does not need to be wound around the actuator 16 that swings between the two positions, a large-diameter actuator having high rigidity can be used as long as space permits. In addition, since the vertical component of the pressing reaction force applied to the actuator 16 is supported by the receiving plate 24, a strong force is applied between the yoke portions 22a and 22b of the actuator 16 and the magnetic pole portion of the solenoid 15 in contact with the yoke portions 22a and 22b. Without bending stress, it can withstand strong lateral needle reaction force.

(Effects of the Invention) As described above, according to the present invention, repulsion and attraction force are simultaneously applied to the two yoke portions of the actuator from both the central magnetic pole portion and both magnetic pole portions of the solenoid. The magnetic force can be used as efficiently as possible, the actuator can receive a strong magnetic force in any direction and can reliably perform switching operation, and stable operation characteristics can be ensured without malfunction due to vibration or the like. When the switching operation of the actuator is completed, a closed circuit is formed by the central magnetic pole portion and any of the side magnetic pole portions of the solenoid and the two yoke portions, so that there is no leakage of magnetic flux,
There is no influence of magnetic force on the adjacent actuator.

[Brief description of the drawings]

1 is a plan sectional view of an embodiment of the present invention, FIG. 2 is a sectional view showing a main part, and FIG. 3 is a sectional view of a conventional example. 1 ... horizontal needle teeth, 12 ... moving frame, 15 ... solenoid, 16 ...
… Actuator, 17a… Central magnetic pole part, 17b, 17c… Side magnetic pole part, 20… fulcrum shaft, 21… Push rod, 22a, 22b…
... Yoke, 23 ... Magnet.

Claims (1)

(57) [Claims] 1. An actuator which can swing about a fulcrum shaft between two positions, ie, a position where the horizontal needle is pressed and a position where the horizontal needle is not pressed, corresponding to the horizontal needle of the jacquard, a central magnetic pole portion and both side magnetic poles. And two magnetized yoke parts which are arranged between these magnetic pole parts and are attached to the rotation base end of the actuator, and reciprocate in the direction of the horizontal needle holding the actuator and the solenoid. A moving frame that moves, and a control circuit that reversibly supplies a current to the solenoid so that the yoke portion is selectively attracted to the magnetic pole portion. When the switching operation of the actuator is completed, the central magnetic pole portion of the solenoid is provided. A horizontal needle control device for a Jacquard machine, wherein a closed circuit is formed by any one of the side magnetic pole portions and two yoke portions.