JPH10266048A - Linear motor unit for driving knitting needle of flat knitting frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear motor unit for driving knitting needle of a flat knitting frame capable of abbreviating a lid plate, suppressing the thickness in transverse direction, allowing to minimize the alignment pitch of the knitting needle by oppositely combining a pair of stator units. SOLUTION: The unit is installed with an oppositely combined pair of stator units 10, auxiliary stator unit 14 placed in the intermediate of the stator units 10, a movable part 20 installed so that it is freely movable back and forth in the inside of each stator unit 10. The stator unit 10 has no need for lid plate, and capable of suppressing the thickness in the transverse direction to a minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat knitting machine of a carriageless type, in which the arrangement pitch of knitting needles on a needle bed can be further reduced and a high-density knitted fabric can be knitted with extra fine yarn. And a linear motor unit for driving the knitting needle.

[0002]

2. Description of the Related Art A carriageless flat knitting machine is equipped with a linear motor unit for driving a knitting needle to a predetermined position such as a welt position, a clearing position, and a tack position.

A conventional linear motor unit is configured by assembling a plurality of movers movably back and forth with respect to a flat stator unit having a plurality of stators. A cover plate that covers the mover is mounted. Therefore, in this device, a plurality of knitting needles can be driven and controlled by forming a linear motor for each set of stator and mover and driving each mover back and forth.

[0004]

According to the prior art, the stator unit has a limitation in reducing the thickness in the lateral direction including the cover plate, and the minimum achievable arrangement pitch of the knitting needles is large. For this reason, there is a problem that it is difficult to knit a high-density knitted fabric with extra-fine yarn.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to minimize the lateral thickness by omitting a cover plate by combining a pair of stator units so as to face each other. An object of the present invention is to provide a linear motor unit for driving a knitting needle in a flat knitting machine capable of further reducing the arrangement pitch of the knitting needles.

[0006]

To achieve the above object, the present invention has a structure in which a pair of plate-shaped stator units to be combined to face each other and a plurality of stators mounted on each of the stator units. A plurality of sub-stators arranged correspondingly in the middle of the stator unit, and a plurality of movers for driving the knitting needles which are assembled to the inside of each stator unit so as to be movable back and forth corresponding to the stator and the sub-stator. Equipped with a stator,
The gist of the sub stator is to form a surface facing the mover on a plurality of magnetic poles different from each other.

[0007] The auxiliary stator can be supported via a spacer attached to each stator unit.
The relay board can be sandwiched by being divided into two parts in the thickness direction.

[0008] The sub-stator may be thicker than the stator.

[0009]

According to the structure of the present invention, a pair of stator units are combined to face each other so that a plurality of stators mounted on each
A plurality of movers to be assembled with each other and a sub-stator arranged in the middle of each mover can be compactly accommodated inside. The stator and the auxiliary stator are, for example, alnico magnets, Fe-Cr-Co-based magnets, ferrite magnets,
Rare earth magnets such as Sm-Co magnets and Nd-Fe-B magnets are used as plate-like permanent magnets. In addition, the mover includes a plate-shaped coil that crosses the magnetic flux from the stator and the sub-stator, and the stator and the mover form a linear motor that drives the knitting needles for each set together with the common sub-stator. I do.

If the sub-stator is supported via a spacer attached to the stator unit, the spacer is inadvertently deformed by the suction force between the stators on each stator unit. This can be prevented, and can also serve as a support member for supporting the sub-stator.

If the auxiliary stator is divided into two parts in the thickness direction and the relay plate is sandwiched, the relay plate is formed of a ferromagnetic material, thereby enhancing the driving force of the knitting needle generated on the mover. be able to. The relay plate protrudes outward from both ends of the sub-stator and supports the sub-stator through a spacer made of ferromagnetic material. This is because a magnetic path leading to the armature is formed, and the magnetic flux traversed by the coil of the armature can be further increased.

When the thickness of the sub-stator is made larger than that of the stator, the distance between the magnetic poles formed on both surfaces of the sub-stator becomes large, and the predetermined magnetic force can be stably maintained for a long period of time. it can. In addition, it is preferable that the thickness of the auxiliary stator be twice or more than that of the stator. The stator can be glued on one side to the ferromagnetic frame plate of the stator unit, but the auxiliary stator must be supported in the middle of the stator unit without touching the members corresponding to the frame plate. Because it must be.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

A linear motor unit for driving a knitting needle in a flat knitting machine includes a pair of flat stator units 10 and 10.
, A plurality of movers 20, 20... Assembled to be movable back and forth inside each stator unit 10, and a stator unit 1.
And sub-stators 14, 14,... Disposed between 0 and 10 (FIGS. 1 and 2).

Each of the stator units 10, 10 includes a frame plate 11 and a plurality of stators 12, 12,... Mounted on the frame plate 11. The frame plates 11, 11 are each formed of a ferromagnetic plate material, and have front engagement portions 11a, 11a that are bent inward.
Are formed. In addition, one frame plate 11 has
A pair of engaging holes 11b, 1
1b is formed, and the other frame plate 11 is formed with inner flanges 11d with engaging portions 11c, 11c along the upper side and the lower side, respectively. However, the engaging portions 11c, 11c... Correspond to the engaging holes 11b, 11b.

Each of the stators 12, 12,... Is formed in a plate shape in which a plurality of permanent magnets 12a, 12a. Each of the permanent magnets 12a has a magnetic pole formed on the front side and the back side, and is arranged with the magnetic poles reversed in order. The stators 12, 12,... On the stator units 10, 10,.
Are arranged at positions corresponding to each other, and the set of opposing permanent magnets 12a, 12a have mutually opposite magnetic poles so as to attract each other. Are arranged in two rows and two columns in the front-rear direction and the up-down direction with respect to each stator unit 10, and a total of four stators are mounted.

Before and after each stator 12, a spacer 13,
13 is mounted. However, the middle spacer 13
Are commonly arranged on the front and rear stators 12 and 12.
The stator units 10, 10 are provided with engaging portions 11c, 11c,.
Are inserted into the engagement holes 11b, 11b,..., The frame plates 11, 11 can be combined to face each other. At this time, the front engagement pieces 11a, 11a,... Are combined such that the corresponding pairs are almost in close contact (FIG. 3), and the relative positions of the stator units 10, 10 are positioned back and forth. Also, the spacers 13, 13... Can maintain a constant interval between the frame plates 11, 11 by the opposed pairs of the spacer units abutting on each other between the stator units 10, 10.

Are arranged corresponding to the stators 12, 12 on the stator units 10, 10 (FIGS. 1 and 2). Each sub-stator 14 includes a stator 12
Are formed in a plate shape including permanent magnets 14a, 14a,... Which invert magnetic poles at every arrangement pitch of the permanent magnets 12a, 12a,. Therefore, each sub-stator 14 includes support portions 14b, 1
4b corresponds to the notches 13 of the spacers 13 on both sides.
a, 13a, the spacers 13, 1
3, it is clamped at an appropriate position between the stator units 10 and 10 (FIG. 3). In addition, each permanent magnet 14a is
Each of the permanent magnets 12a of the stators 12, 12 opposed to both sides,
The magnetic poles S and N of 12a are formed at different magnetic poles N and S (FIG. 4). In addition, the auxiliary stator 14 is
In contrast, the thickness is set to about twice.

The movable elements 20, 20,... Are each composed of a movable frame 21, a coil 22 incorporated in the movable frame 21,
22 (FIGS. 1 and 2), and is assembled to the stator unit 10 via a linear bearing 23. Are formed on a substrate (not shown), and are fixed so as to fit into the openings 21a of the movable frame 21. The movable frame 21 is connected to the slider 23a of the linear bearing 23 by attaching a mounting portion 21b formed along one long side, so that the coils 22, 22,. It is assembled to be able to move back and forth freely.
A jack 24 protruding long forward is screwed to the tip of the mounting portion 21b, and horizontal and vertical offsets d1 and d2 are formed in the middle of the jack 24. An engagement recess 24a is formed.

Therefore, each movable unit 20 can be connected to a knitting needle 26 on a needle bed (not shown) via a jack 24 and an intermediate jack 25. In addition, intermediate jack 2
5 is engaged with both the jack 24 and the knitting needle 26 via the engagement projections 25a, 25a at both ends, and the intermediate jack 2
, 25, ..., knitting needles 26, 26 ... are arranged laterally on the needle bed at predetermined arrangement pitches. That is, the jack 24 has its entire length and offsets d1, d2.
And the stator unit 10,
Each mover 20 on 10 can correspond sequentially to a particular knitting needle 26 on the needle bed.

The linear bearing 23 is constructed by combining a slider 23a with a ball and a guide rail 23b in the form of a channel (FIGS. 5 and 6). However, FIG. 6B is a view corresponding to the arrow A in FIG.

The guide rails 23b are provided with locking portions 23 at both ends.
.. are housed inward through openings b formed in the frame plate 11 of the stator unit 10 via b2, 23b2. In addition, positioning inner flanges 11e1, 11e1 are formed above and below the opening 11e. Also,
The guide rail 23b is prevented from coming off via stopper blocks 23c, 23c engaging with both ends, and each stopper block 23c is fixed to the frame plate 11 via a set screw 23c1.

The linear motor unit for driving the knitting needles in such a flat knitting machine includes coils 22, 22.
By applying a pulse-like drive current in an appropriate polarity direction, a predetermined knitting needle 26 can be driven back and forth at a predetermined timing (the direction of arrow K1 in FIG. 2).
This is because magnetic fluxes that alternately reverse in the front-rear direction pass through the coils 22 of each mover 20 via the stators 12 and the auxiliary stators 14 on both sides. .. Are arranged in the middle of the stator units 10 and 10, and there is no need to provide a special cover plate. The thickness to can be minimized (FIG. 5). That is, in the stator units 10 and 10, even when the arrangement pitch of the knitting needles 26 is small, each movable element 20 can be made to correspond to the predetermined knitting needle 26 via the jack 24 and the intermediate jack 25.

[0024]

Other Embodiments Each sub-stator 14 may be divided into two in the thickness direction to form partial sub-stators 14c, 14c, and a relay plate 14d may be interposed therebetween (FIG. 7). The relay plate 14d is
By being formed of a ferromagnetic material and projecting from both ends of the sub-stator 14, the sub-stator 14 can be supported via spacers 13, 13. However, the spacers 13, 13... At this time are formed of a ferromagnetic material.
, A series of magnetic paths reaching the corresponding stators 12, 12 via the frame plates 11, 11 can be formed.

In the above description, the auxiliary stators 14, 14
… Is the stator 1 mounted on the stator units 10 and 10
When the magnets 2 and 12 have a sufficient magnetic force, they may be omitted, and the thickness to of the stator units 10 and 10 can be further reduced. Also, each stator unit 1
, And the stators 12, 12,...
Instead of arranging in 2 rows and 2 columns, m rows and n columns (m, n
May be an arbitrary integer of 2 or more).

[0026]

As described above, according to the present invention, by combining a pair of stator units so as to face each other, it is not necessary to provide a cover plate in the middle, and the thickness of the stator unit in the lateral direction can be reduced. Therefore, the arrangement pitch of the knitting needles can be made sufficiently small, and there is an excellent effect that a high-density knitted fabric made of extremely fine yarn can be easily knitted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the entire configuration.

FIG. 2 is an enlarged exploded perspective view of a main part.

FIG. 3 is an enlarged cross-sectional view taken along the line XX of FIG. 1;

FIG. 4 is an enlarged sectional view of a main part of FIG. 3;

FIG. 5 is an enlarged cross-sectional view taken along line YY of FIG. 1;

FIG. 6 is an enlarged explanatory view of a main part of FIG. 2;

FIG. 7 is a schematic diagram corresponding to FIG. 3, showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Stator unit 12 ... Stator 13 ... Spacer 14 ... Secondary stator 14a ... Relay board 20 ... Movable element 26 ... Knitting needle

Claims (4)

[Claims] 1. A pair of flat stator units which are combined to face each other, and a plurality of sub-units disposed in the middle of the stator units corresponding to a plurality of stators mounted on each of the stator units. A stator, comprising a plurality of needles for knitting needle driving, which are assembled to the inside of each of the stator units so as to be able to move back and forth in correspondence with the stator and the sub-stator, wherein the stator and the sub-stator are A linear motor unit for driving a knitting needle in a flat knitting machine, wherein a surface facing the mover is formed with a plurality of magnetic poles different from each other. 2. The linear motor for driving a knitting needle in a flat knitting machine according to claim 1, wherein the sub-stator is supported via a spacer provided to face each of the stator units. unit. 3. A linear motor unit for driving a knitting needle in a flat knitting machine according to claim 1, wherein said auxiliary stator is divided into two parts in a thickness direction to sandwich said relay plate. . 4. The linear motor unit for driving a knitting needle in a flat knitting machine according to claim 1, wherein the auxiliary stator is thicker than a thickness of the stator.