JPH05302250A - Needle selection actuator for knitter - Google Patents

Abstract

PURPOSE:To increase the magnetic flux density of the magnets of the actuators in the needle selection with the magnets of the actuators and improve the stability of the needles and selectors, when they are selected, whereby malfunction can be prevented. CONSTITUTION:A couple of electromagnets 1, 2 each of which is provided, on its both ends, with the electromagnetic poles having the top attracting face 11 and the inclined attracting face 12 at an angle to the top face is set in opposition to another couple of magnets 3, 5 each so that the inclined faces form a hill shape with the top faces in the middle. Further, a couple of electromagnets each of which has electromagnetic poles having the top attracting face and the inclined attracting face at an angle on its both ends are set in opposition to each other so that the inclined faces form a hill shape with the top faces at the center and a space is formed between the both electromagnetic poles to give a stabilized top slit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator used for needle selection of a knitting machine.

[0002]

2. Description of the Related Art In a flat knitting machine, an electromagnet of an actuator used for selecting needles in a plurality of rows of needle grooves according to a handle or the like is provided at a tail portion of a needle during relative movement of a pair of needles. By sucking the needle butt or the selector butt, the predetermined needle is pulled out from the needle groove and the predetermined needle is selected. At this time, the needle that was not sucked remains at the same position. The above-mentioned needle picked up and pulled up is moved to the magnetic pole side part after the magnetic pole top part of the electromagnet is finished by the relative movement of the actuator and the needle while being attracted to the magnetic pole top part of the electromagnet, and is provided following the magnetic pole top part. The needle butt moves upward while being attracted to the rising slope, and as a result, the needle butt is pulled up higher than butt of other needles.

In the flat knitting machine, the above-mentioned actuator is
It is provided on the carriage and reciprocates left and right according to the knitting of the knitted fabric. Therefore, the magnetic poles of the electromagnets of the actuator have inclined surfaces on both the left and right sides of the top so as to correspond to the rightward and leftward movements of the carriage. If the magnetic flux is concentrated in the magnetic poles of the electromagnet, the attracting force becomes larger. In the actuator, the suction surface for initially sucking the needle butt or the selector butt is the magnetic pole portion, but the magnetic pole portion has slopes on both sides for pulling up the bat. However, since the butt is attracted when the carriage moves rightward or leftward, only the magnetic pole apex and the inclined surface on the trailing side can attract the butt, and the magnetic flux on the inclined surface on the leading side cannot perform the effect of attracting the bat. As a result, some part of the total magnetic flux cannot perform the attracting action, and the attracting force inevitably decreases. In addition, when using an electromagnet magnetic pole that can be used for both left and right directions, it has inclined surfaces on both left and right sides, and it is not possible to make the length of the top of the top of the magnetic pole that first attracts the butt too long, The distance at which bats can be selected is shortened, the posture of the selected bat is not stable when it is selected, and even unselected bats are attracted due to the effects of residual magnetic flux density and leakage magnetic flux. However, there was a defect that malfunctions were likely to occur.

[0004]

SUMMARY OF THE INVENTION In view of the above points, the present invention increases the magnetic flux density of the electromagnet of the actuator when selecting the needle by the electromagnet of the actuator, and improves the stability of the needle, selector, etc. when selected. The purpose is to increase the malfunction and eliminate malfunctions.

[0005]

A pair of electromagnets having electromagnetic poles at both ends, each having an electromagnetic pole having a top attraction surface and an inclined attraction surface formed by an inclined surface provided at an angle to the top surface, are provided oppositely to each other. Both electromagnetic poles of the electromagnet facing each other are provided so that the inclined suction surface has a mountain shape with the top suction surface in the middle. Further, a gap is provided between the both electromagnetic poles, and the space between them is defined as the top stable gap portion.

[0006]

When the needle to be selected or the butt of the selector among the needles set in the needle groove is opposed to the top attraction surface of the top of the electromagnet pole of the actuator provided at the needle selection position, the electromagnet is selected. When the bat is energized, the butt is attracted to the top suction surface and continues to move while being attracted to the inclined suction surface of the magnetic pole. Two electromagnet poles with a top suction surface and a single inclined suction surface following it,
When the magnetic poles of the actuator positioned so that the inclined suction surfaces are located on both sides of the top suction surface as the center advances with the carriage and the butt of the needle or selector approaches the selected position, all the needles including the selected needle or selector are selected. The needle or selector is raised by the raising cam to the height of the top suction surface. Therefore, when the actuator advances there, all of the above needles or selectors are moved so that the butt comes closest to the top suction surface and the top stabilizing portion of the electromagnetic pole of the actuator, and the tail is lifted by the lifting cam. , It is held between the top of the electromagnetic pole of the actuator and the lifting cam. Therefore, the butt advances from the top stabilizing portion to the top suction surface, and when the electromagnetic pole on the trailing side of the two electromagnetic poles is energized, the bat is attracted to the top suction surface, but the selected needle is It can remain stable without jerks and does not behave like the selected needle.

Further, the selected bat is attracted by the magnetic flux of the electromagnet due to energization when it comes close to the top attraction surface provided following the top stabilizing portion as the carriage travels as described above. Then, the suction is performed on the inclined suction surface following the top suction surface. At this time, the bat is attracted by the action of all magnetic flux concentrated on the top attraction surface and the inclined attraction surface of the electromagnetic pole. As a result, the loss of magnetic flux is reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the implementation of the actuator 100 of the present invention will be described with reference to the drawings.

In the illustrated example, the inverted U-shaped electromagnets 1 and 2 are paired, and the magnetic poles 3, 4, 5 and 6 are set downward. In FIGS. 2 and 3, one of the electromagnets 2 is set. The portion is cut away for illustration. The electromagnets 1 and 2 are both electrodes 3, 4,
Coils 7, 8, 9 and 10 are provided on 5 and 6. Each magnetic pole 3, 4, 5, 6 is provided with a top suction surface 11 on its top and an inclined suction surface 12 on its side surface. Inclined suction surface 1
As shown in FIG. 1 and FIG. 4B, 2 is provided outside the pair of magnetic poles 3 and 5 so as to form a mountain shape.
In FIGS. 1 and 4B, the electromagnet 1 is an actuator 100.
When the actuator 100 moves to the right, the electromagnet 2 operates when the actuator 100 moves to the left. Magnetic poles 3, 4,
The permanent magnet magnetic poles 14, 15, 16 each having an inclined surface 13 having the same inclination angle as the inclined attraction surface 12 on each of 5, 5 and 6,
17 are provided adjacent to each other. However, the permanent magnet magnetic pole 14,
There is a small gap between 15, 16, 17 and the electromagnet magnetic poles 3, 4, 5, 6 and a separator 18 is interposed between them so that they do not contact each other (B in FIG. 4). Permanent magnets 19 and 20 are provided between the permanent magnet magnetic poles 14 and 15 and between the permanent magnet magnetic poles 16 and 17, respectively. The directions of the magnetic poles of the permanent magnet 19 and the permanent magnet 20 facing each other are opposite to each other. Further, the permanent magnet magnetic pole 14, the electromagnet magnetic pole 3,
On the side surfaces of the electromagnet magnetic pole 5 and the permanent magnet magnetic pole 16, a slope 1 is formed.
3, A protector 22 having a sliding edge 21 that draws the same bending line as the inclined suction surface 12 is provided via a spacer 23.
A protector 24 similar to the protector 22 is also provided on the side surfaces of the permanent magnet magnetic pole 15, the electromagnet magnetic pole 4, the electromagnet magnetic pole 6, and the permanent magnet magnetic pole 17 via a spacer 25. The protectors 22 and 24 are made of a plate-shaped magnetic material and have wear resistance, and the spacers 23 and 25 are both made of a non-magnetic material such as a stainless steel plate.

By providing the protectors 22 and 24, the butt 26 such as a needle or a selector attracted to the magnetic poles slides in contact with the sliding edges 21 of the protectors 22 and 24, and the electromagnet magnetic poles 3, 4, 5 and 6. Or permanent magnet magnetic pole 1
There is no contact with 4, 15, 16, 17, etc., and they do not wear. Between electromagnet poles 3, 5 and 4, 6
A small gap is provided between them to form a top stable gap portion 27. The butt 26 facing the top attraction surface 11 of the electromagnet magnetic poles 3, 4, 5, 6 contacts the top edge of the protector 24 in the top stable gap 27. By being guided by it, I try not to be jealous and to do a stable operation.

The electromagnets 1, 2 and the permanent magnets 19, 20
The permanent magnet magnetic poles 14, 15, 16 and 17 are housed in a case 28 and fixed by screws 29 and 29. A flange 30 is provided on the case 28, and the flange 30 is appropriately fixed to the carriage.

When the electromagnets 1 and 2 are not energized, the magnetic fluxes of the permanent magnets 19 and 20 are as shown in FIG.
9, permanent magnet magnetic pole 14, protector 22, permanent magnet magnetic pole 16, permanent magnet 20, permanent magnet magnetic pole 17, protector 2
4, the permanent magnet magnetic pole 15, and the permanent magnet 19 orbit. When energized, as shown in FIG. 3, the magnetic flux circulates around the magnetic pole 3 of the electromagnet 1, the butt 26 and the magnetic pole 4 of the needle or the selector, or the magnetic pole 6 of the electromagnet 2 and the butt 26 and the magnetic pole 5 of the needle or the selector. Orbit.

It is now assumed that the carriage advances from left to right in FIGS. All the needles or the butt 26 of the selector jack inserted in the needle bed are advanced by the cam (not shown) so as to be pushed down to the height of the top 27 of the sliding edge 21 of the protector 24 of the actuator 100, and to move to the actuator 100. opposite. Then, first, the magnetic poles 5 and 6 of the electromagnet 2 face the butt, but the electromagnet 2 on the leading side is not energized at this time. The selected bat 26 moves from the electromagnet 2 side to the electromagnet 1 side as the carriage advances, while the electrodes 3, 5
Protector 2 for the top stable gap 27 between the spaces 4 and 6.
The butt 26 is prevented from moving by the sliding edges 21 of 2, 24. The selected bat 26 is the electromagnet 1 on the trailing side.
When the electromagnet 1 is energized when facing the top attraction surfaces 11 of the magnetic poles 3, 4, the magnetic field lines circulate as shown in FIG. The protectors 22 and 24 abut against the sliding edge 21 and slide on the butt 26 as the carriage advances. As described above, the shapes of the sliding edges 21 of the protectors 22 and 24 are the same as those of the inclined attraction surfaces 12 of the electromagnetic poles 3, 4, 5 and 6 and the inclined surface 13 of the permanent magnet magnetic pole 14, so that the electromagnetic poles 3 and 4 are not formed. As the carriage advances, the butt 26 is attracted to the inclined surface 13 of the permanent magnet magnetic pole 14 following the inclined attraction surface 12 of the electromagnetic poles 3 and 4, and the protector 2
The sliding edge 21 of 2, 24 will be raised. The butt 26 that has not been selected and sucked advances as it is, and remains in the low position without being affected by the leakage magnetic flux. When the carriage moves in the opposite direction, the electromagnet 1 is not energized, and the butt 26 is attracted by the electromagnet 2 and the permanent magnet 20.

As described above, in the actuator of the present invention, the top of the electromagnetic pole is divided into the top suction surface and the inclined suction surface continuing to one side thereof, and the bat sucked by the top suction surface is sucked by the inclined suction surface and pulled up. Since all of the magnetic pole top surfaces perform the action for attracting the butt and do not have the slope for attracting at the time of backward movement like the conventional actuator, all the magnetic flux of one pole is directed to the attraction action. Therefore, the suction power can be increased.

[Brief description of drawings]

FIG. 1 is a schematic perspective view in which a part of an actuator of the present invention is omitted.

FIG. 2 is a perspective view, partially omitted, showing the flow of magnetic flux when the actuator of the present invention is not energized.

FIG. 3 is a perspective view, partially omitted, showing the flow of magnetic flux when the actuator of the present invention is energized.

FIG. 4 shows an actuator according to the present invention, in which A is a plan view, B is a longitudinal side view, and C is a bottom view.

FIG. 5 shows an actuator of the present invention, in which A is a side view and B is a rear view.

[Explanation of symbols]

 1, 2 Electromagnet 3, 4, 5, 6 Electromagnetic pole 11 Top suction surface 12 Inclined suction surface 25 Top stable gap 100 Actuator

Claims (2)

[Claims] 1. A pair of electromagnets having electromagnetic poles at both ends, each having an electromagnetic pole having a top attracting surface and an inclined attracting surface formed by one slanting surface provided at an angle to the pair, and the pair of electromagnets being opposed to each other. A needle selecting actuator for a knitting machine, characterized in that both electromagnetic poles facing each other are provided so that the inclined suction surface has a mountain shape with the top suction surface in the middle. 2. A pair of electromagnets having electromagnetic poles at both ends, each having an electromagnetic pole having a top attracting surface and an inclined attracting surface formed by one slanting surface provided at an angle to the pair, and the pair of electromagnets being opposed to each other. A knitting machine characterized in that both electromagnetic poles facing each other are provided such that the inclined suction surface has a mountain shape with the top suction surface in the middle, and a gap is provided between the both electromagnetic poles to form a top stable gap portion. Needle selection actuator.