JP3142231B2 - Linear step motor for fiber knitting machine and driving method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear stepping motor for a textile knitting machine and a driving method, and more particularly to at least one linear stepping motor for a textile knitting machine.
The present invention relates to a novel improvement for variably moving a pattern thread guide pin at a pitch of / 18 inch or 1/24 inch.

[0002]

2. Description of the Related Art Conventionally, in a fiber knitting machine of this type, a knitted fabric (a fabric) is formed by intersecting a number of warp yarns or ground yarns with a pattern yarn serving as a weft yarn or a knitting yarn. ) And knits (cloths) are made. The yarn spacing of this warp and ground yarn is called the inch system, and as typical dimensions,
The intervals of 1/18 inch (1.411 mm) and 1/24 inch (1.058 mm) are frequently used, and this knitting machine uses the required number of pattern yarns for the ground yarns arranged at this interval. The yarn guide pin moves at the above-mentioned interval to be guided to the ground yarn, and an arbitrary ground yarn and pattern yarn intersect to form a knitted pattern. Therefore, in the conventional knitting machine, the pattern yarn guide pin is driven by a mechanical cam structure with a minimum moving unit amount of 1/18 inch or 1/24 inch.

[0003]

The structure for moving the pattern yarn guide pin in the conventional knitting machine is a mechanical cam structure, and therefore, the interval once set, that is, the amount of movement cannot be changed, so that the knitting machine is manufactured. The pattern of the knitted fabric also had a single repetitive operation. Therefore, it has never been possible to respond to the need for arbitrary diversity of pictures.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in particular, has a pitch of at least 1/18 inch or 1/24 inch using only one linear step motor for a fiber knitting machine. It is an object of the present invention to provide a linear stepping motor and a driving method for a fiber knitting machine, in which the pattern yarn guide pin is variably moved.

[0005]

A linear step motor for a fiber knitting machine according to the present invention is provided with a rail having a large number of fixed teeth on an upper portion thereof, and rotatably provided on a shaft running on the rail and made of a non-magnetic material. A first core portion having a wheel composed of bearings for an inner ring and an outer ring,
A movable body composed of a core body integrally having a core portion, a flange formed on the wheel, a step formed with a smaller diameter than the flange, and a first coil wound around the first core portion When,
A second coil wound around the second core, a through-hole formed between the coils of the core body via a pair of constrictions, and a magnet inserted into the through-hole; In the linear stepping motor for a fiber knitting machine, wherein the movable body is moved on the rail by selective excitation to the coils, the flanges (3a) are positioned outside the rail. The step portion is located on the rail, and the tooth pitch of the fixed teeth and the small teeth is 1/9, 1
/ 18, 1/27, or 1/36 inch, wherein the movable body moves at a movement pitch of 1/18 inch or 1/24 inch, and a linear step for a fiber knitting machine according to the present invention. The motor driving method includes a rail having a large number of fixed teeth on an upper portion, a wheel running on the rail, and being rotatably provided by a shaft made of a non-magnetic material and having wheels including bearings of an inner ring and an outer ring. A movable body comprising a core body integrally having a first core portion and a second core portion provided with small teeth, a flange formed on the wheel, and a step formed to have a smaller diameter than the flange, The first wound around the first core portion
A coil, a second coil wound around the second core portion,
A through-hole formed between the coils of the core body and formed through a pair of constrictions, and a magnet fitted into the through-hole, wherein each of the flanges is outside the rail; Position, the step portion is located on the rail (1), using a linear step motor for a fiber knitting machine that moves the movable body on the rail by selective excitation to each coil. While driving the pattern thread guide pin,
A method of changing the moving pitch of the pattern yarn guide pin to at least 1/18 inch or 1/24 inch by changing the drive pulse of one linear step motor for the fiber knitting machine.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a linear stepping motor and a driving method for a fiber knitting machine according to the present invention will be described below in detail with reference to the drawings. First, a linear step motor for a fiber knitting machine employed in the present invention will be described with reference to FIGS. 1 and 2 is a rail having a plurality of fixed teeth 2 thereon, and a pair of linear rail portions 1a and 1b are formed on both sides of the rail 1. . On this rail 1,
A movable body 4 having four wheels 3 running on each of the rails 1a and 1b is movably provided. The movable body 4 is formed by stacking a large number of core pieces 8A punched integrally and penetrating the center thereof. It has a core body 8 having a hole 5 and a pair of constricted parts 6 and 7, and the core body 8 has first and second core parts 8 a and 8 b integrally formed on the left and right with the through hole 5 as a center. . Each of the core portions 8a, 8b of the core body 8 includes first, second, third, and fourth magnetic poles 10, 11, 12, 13, each having a plurality of small teeth 9, as shown in FIG. Have. A knitting needle (not shown) is attached to the movable body 4 to knit a fiber.

Although not shown, each core piece 8A of the core body 8 is laminated by bonding an adhesive between the core pieces 8A, and the lower surface of each small tooth 9 is fixed to each axis in this state. Hole 20,
21 is polished to be flush with the dimensional reference, each lower surface is made uniform, and the gap length is accurately secured. The fixed teeth 2 are also formed in the same manner as the movable teeth 9, and the upper surfaces of the fixed teeth 2 and the rail portions 1a and 1b are polished on the same surface. A magnet 15 in the form of a plate made of a rare earth material such as samarium cobalt is inserted into the through hole 5. The shaft holes 20 and 21 are formed at outer end positions of the first core portion 8a and the second core portion 8b.
Shafts 22 and 23 made of a non-magnetic material are directly inserted into the shafts 0 and 21, and well-known bearings made of an inner ring and an outer ring are provided at both ends of the shafts 22 and 23 as the wheels 3 so as to be rotatable on the shafts 22 and 23. ing. That is, the inner ring of this bearing is
The outer ring plays the role of the wheel 3 by being fitted to the wheel 3. The wheel 3 includes a flange 3a and a step 3b formed to have a smaller diameter than the flange 3a.
Are located outside the rail 1, and the step 3 b is configured to move on the rail 1.

The first and second concave portions 25 and 26 formed in the core portions 8a and 8b are provided with a first via a bobbin 27.
The coil 28 and the second coil 29 are wound, and the magnetic poles 10, 11, 12, 13 are spaced apart from each other by the concave parts 25, 26 and the concave part 31 formed between the magnetic poles 11, 12. ing. As shown in FIG. 7, the small teeth 9 in each of the magnetic poles 10 to 13 are 1/1 between the magnetic poles 10 and 11.
2 pitches, similarly, there is a 1/2 pitch shift between the magnetic poles 12 and 13, and 1 between the magnetic poles 10, 11 and 12, 13.
It is formed shifted by / 4 pitch.

Next, the operation will be described. First, as is well known, the excitation current is selectively applied to each of the coils 28 and 29 as shown in states 0 to 1 to 2 in FIG. The magnetic path between each small tooth 9 and the fixed tooth 2 of the rail 1 changes as is well known, and the core body 8
Is moved stepwise by a predetermined amount with the rotation of the wheel 3. As described above, this movable body 4
For example, embroidery can be performed by attaching a pattern thread guide pin 30 with a knitting needle and knitting with a knitting machine. In the linear step motor having the above-described configuration, the thrust acting on the movable body 4 during the operation shown in FIG. 8 is expressed by the following equations (1) to (4) using the following equations (1) and (2). Can be represented.

[0010]

(Equation 1)

[0011]

(Equation 2)

Next, a driving method of the fiber knitting machine will be described. First, the linear step motor 20 for a fiber knitting machine shown in FIG. 1 described above includes a full-step method using one-phase or two-phase excitation and a half-step method using 1-2-phase excitation according to a known drive excitation method. In the step method, the pulse moves 1 / 4T (teeth pitch) in one pulse, and in the half step method, the pulse moves 1 / 8T (teeth pitch) in one pulse. Here, the tooth pitch T of the small teeth 9 of the movable body 4
And the number of driving pulses P, and taking the above-mentioned excitation method into consideration, the movable body 4 having the pattern thread guide pin 30 is 1/18
The following formulas (5) to (8) represent the state of moving at a moving pitch of inch or 1/24 inch.

[0013]

(Equation 3)

Therefore, in the above equations (5) to (8),
When the tooth pitch T is obtained by changing the number of driving pulses P, the following table 1 is obtained.

[0015]

[Table 1]

In Table 1, the movable member 4 is 1/18
If the tooth pitch T that moves by inch and the tooth pitch T that moves by 1/24 inch are picked up, the tooth pitch TF becomes 1/9, 1/18, 1/27, 1/36. The tooth pitch T is considered to be limited even in view of the processing ability for manufacturing the small teeth 9 of the movable body 4. Therefore, every four pulses in the full-step method, every eight pulses in the half-step method, a movement at a pitch of 1/18 inch, and in the full-step method, every three pulses,
In the half-step method, movement can be performed every 1/24 inch every 6 pulses. That is, the movable body 4 can be step-moved at a moving pitch of 1/18 inch or 1/24 inch only by changing the pulse number by using one linear step motor 50 in common.

[0017]

The linear stepping motor and the driving method for a fiber knitting machine according to the present invention are configured as described above, and the following effects can be obtained. That is, only by changing the number of drive pulses, a single linear step motor can obtain a different moving amount of the movable body, and by changing the moving amount of the pattern thread guide pin arbitrarily, a single knitting machine can use And other knitted fabrics can be obtained. Also,
The structure is simple because it is formed of a core body integrally having the first and second core portions and the magnet is provided in the through hole.

[Brief description of the drawings]

FIG. 1 is a front view showing a linear step motor for a fiber knitting machine according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side sectional view of FIG. 1;

FIG. 4 is an enlarged perspective view of a main part of FIG.

FIG. 5 is a front view showing the core body of FIG. 4;

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a principle configuration diagram of FIG. 1;

FIG. 8 is an operation principle diagram of FIG. 1;

FIG. 9 is an enlarged view showing a main part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rail 2 Fixed tooth 3 Wheel 3a Flange part 3b Step part 4 Movable body 5 Through hole 8 Core body 8a, 8b Core 9 Small tooth 30 Pattern guide pin 50 Linear step motor for textile knitting machine

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 41/03

Claims (2)

(57) [Claims] 1. A rail having a number of fixed teeth (2) on the upper part.
(1) and a shaft running on the rail (1) and made of a non-magnetic material
A first wheel rotatably provided by (22, 23) and comprising a bearing of an inner ring and an outer ring and having a plurality of small teeth (9) in a lower portion;
A core body integrally having a core part (8a) and a second core part (8b)
(8), a flange (3a) formed on the wheel (3), and a step (3) formed with a smaller diameter than the flange (3a).
b) and a first coil (28) wound around the first core portion (8a)
And a second coil (29) wound around the second core portion (8b).
And a through hole (5) formed between the coils (28, 29) of the core body (8) and formed through a pair of constrictions (6, 7).
And a magnet (15) inserted into the through hole (5),
In the linear step motor for a fiber knitting machine, wherein the movable body (4) is moved on the rail (1) by selective excitation to the coils (28, 29), the flanges ( Three
a) is located outside the rail (1), the step (3b) is located on the rail (1), and the tooth pitch of the fixed teeth (2) and the small teeth (9) is reduced by 1 /. 9, 1/18, 1/27, 1 /
36. A linear step motor for a fiber knitting machine, wherein the movable body (4) is configured to move at a movement pitch of 1/18 inch or 1/24 inch. 2. A rail having a number of fixed teeth (2) on the upper part.
(1) and a shaft running on the rail (1) and made of a non-magnetic material
A first wheel rotatably provided by (22, 23) and comprising a bearing of an inner ring and an outer ring and having a plurality of small teeth (9) in a lower portion;
A core body integrally having a core part (8a) and a second core part (8b)
(8), a flange (3a) formed on the wheel (3), and a step (3) formed with a smaller diameter than the flange (3a).
b) and a first coil (28) wound around the first core portion (8a)
And a second coil (29) wound around the second core portion (8b).
And a through hole (5) formed between the coils (28, 29) of the core body (8) and formed through a pair of constrictions (6, 7).
And a magnet (15) inserted into the through hole (5),
The flanges (3a) are located outside the rails (1), the steps (3b) are located on the rails (1), and the coils (28, 29). A pattern yarn guide pin using a linear step motor (50) for a fiber knitting machine configured to move the movable body (4) on the rail (1) by selective excitation of
(30) and by changing the drive pulse of one of the linear step motors (50) for the textile knitting machine, the moving pitch of the pattern yarn guide pin (30) is reduced by at least 1/1.
A method for driving a linear step motor for a fiber knitting machine, wherein the method is changed to 8 inches or 1/24 inches.