JPH09149623A - Linear stepping motor for fiber knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of burs at the time of grinding by providing stator teeth in the grooves of a rail through the aid of an adhesive agent, and putting an adhesive agent in the teeth and grinding the stator teeth and the rail simultaneously. SOLUTION: On both sides of a rail 1 a pair of linear rail divisions are formed. Above this rail 1, a movable body 4 having four wheels 3 which runs on each rail division is provided in such a way as to be able to move freely. This movable body 4 has a large number of core pieces punched into a body and laminated, and a core body 8 having a through hole 5 and a pair of constricted parts 6, 7 in the center. And on the right and left of this through hole 5 at its symmetrical positions, this core body 8 has first and second cores 8a, 8b. And stator teeth 2 are provided through the aid of an adhesive agent filling the grooves 1A of the rail 1. By grinding the stator teeth 2 and the rail 1 simultaneously under this condition, generation and appearance of burs on the surface is prevented with the help of the adhesive agent.

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 fiber knitting machine, and in particular, by providing a laminated fixed tooth in a groove of a rail via an adhesive and polishing the rail and the fixed tooth at the same time, The present invention relates to a new improvement for preventing the occurrence of burrs during polishing with an adhesive and for improving the accuracy of the gap between the rail and the core body by polishing the fixed tooth and the rail on the same surface.

[0002]

2. Description of the Related Art Conventionally, a fixed tooth and a rail in a linear step motor of this type used heretofore have been fitted directly to each other and polished to be flush with each other.

[0003]

Since the conventional linear step motor is constructed as described above, there are the following problems. That is, since the fixed teeth were directly provided on the rails for polishing, burrs during polishing tended to remain in the grooves between the teeth. Therefore, this interval cannot be maintained accurately, and sometimes this metal burr piece adheres to this gap, which is a fatal defect at the time of step driving as a linear step motor. Furthermore, the surface of the fixed tooth and the rail surface are not the same surface, and a processing error is likely to occur, and it is extremely difficult to secure a prescribed uniform gap. Further, since each core has a pair of magnetic poles, the pitch accuracy of each magnetic pole when the cores are adhered also varies depending on the assembling method.

The present invention has been made to solve the above problems, and in particular, precision fixing teeth are provided in the groove of the rail via an adhesive, and the rail and the fixing tooth are fixed by the adhesive. Then, the polishing is performed at the same time to prevent the occurrence of burrs during polishing with the adhesive. Another object of the present invention is to provide a linear step motor for a fiber knitting machine in which a fixed gap is secured by simultaneously grinding a fixed tooth and a rail on the same surface.

[0005]

A linear step motor for a fiber knitting machine according to the present invention has a rail having fixed teeth of a laminated structure on an upper portion, a wheel traveling on the rail, and a plurality of moving teeth on a lower portion. And a first coil provided on the movable body, and a second coil provided on the movable body.
In the linear step motor for a fiber knitting machine, which has a coil and is configured to move the movable body by selective excitation to each of the coils, the fixed teeth are provided in the groove of the rail via an adhesive, An adhesive is put in the fixed teeth and the fixed teeth and the rail are simultaneously polished.

More specifically, the core body around which each coil of the movable body is wound is integrally formed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a linear step motor for a fiber knitting machine according to the present invention will be described in detail below with reference to the drawings. The reference numeral 1 in FIGS. 1 and 2 is a rail having fixed teeth 2 provided in a groove 1A in the upper portion thereof, and a pair of linear rail portions 1a and 1b on both sides of the rail 1. Are formed. On this rail 1, 4 traveling on each rail portion 1a, 1b
A movable body 4 having individual wheels 3 is movably provided. The movable body 4 is formed by stacking a large number of integrally punched core pieces 8A and at the center thereof a through hole 5 and a pair of constricted portions 6 and 7. The core body 8 has a core body 8 having first and second cores 8a and 8b formed on the left and right with the through hole 5 as a center. The cores 8a and 8b of the core body 8 are
As particularly shown in FIG. 5, it has first, second, third and fourth magnetic poles 10, 11, 12, 13 each having a plurality of small teeth 9. A knitting needle (not shown) for embroidery is attached to the movable body 4 to knit fibers.
Further, the fixed tooth 2 is provided via the adhesive A filled in the groove 1A of the rail 1, and by simultaneously polishing the fixed tooth 2 and the rail 1 in this state, burrs are not generated by the adhesive A. , Burr is prevented from appearing on the surface (the surface facing the small teeth 9).

Although not shown, the core pieces 8A of the core body 8 are laminated by adhering each core piece 8A with an adhesive agent A, and the lower surface of each small tooth 9 is polished in this state. The surfaces are flush with each other, and the lower surfaces are aligned on the same plane. The through hole 5
A plate-shaped magnet 15 made of a rare earth such as samarium cobalt is fitted in the inside. At the outer end positions of the first core 8a and the second core 8b, shaft holes 20, 21 are formed.
Shafts 22 and 23 made of a non-magnetic material are directly inserted into the shaft holes 20 and 21, respectively, and bearings (not shown) are rotatably attached to the shafts 22 and 23 as wheels 3 at both ends of the shafts 22 and 23. It is provided. That is, this bearing comprises a well-known inner ring and outer ring, and by attaching the inner ring to the shafts 22 and 23, the outer ring can be used as a wheel.

The first and second cores formed on the cores 8a and 8b,
A first coil 28 and a second coil 29 are wound around the second recesses 25 and 26 via a bobbin 27,
The recesses 0, 11, 12, and 13 are spaced apart from each other by the recesses 25 and 26 and the recess 30 formed between the magnetic poles 11 and 12. As shown in FIG. 7, the small teeth 9 in each of the magnetic poles 10 to 13 are で between the magnetic poles 10 and 11.
Pitch, similarly, there is a 1/2 pitch deviation between the magnetic poles 12 and 13, and 1 / between the magnetic poles 10, 11 and 12, 13.
It is formed shifted by four pitches.

Next, the operation will be described. First, as is well known, by selectively applying an exciting current to the coils 28 and 29 as shown in states 0 to I to II to III of FIG. The magnetic path between each small tooth 9 and the fixed tooth 2 of the rail 1 changes in a known manner, and the core body 8
The movable body 4 having the step moves stepwise by a predetermined amount as the wheels 3 rotate. As described above, this movable body 4
By attaching a knitting needle (not shown) to and knitting with a knitting machine, for example, embroidery can be performed. In addition, the thrust acting on the movable body 4 during the operation shown in FIG. 8 in the linear stepping motor having the above-described configuration is shown by reference from the well-known equations (1) to (4) from the following equations 1 and 2. Can be represented.

[0011]

(Equation 1)

[0012]

(Equation 2)

[0013]

Since the linear step motor for a fiber knitting machine according to the present invention is constructed as described above, the following effects can be obtained. That is, since the rail on which the movable body travels is provided with fixed teeth via an adhesive and the fixed teeth also contain the adhesive and the rail is simultaneously polished, burrs during polishing are not generated by the adhesive. First, the surface of the fixed teeth and the rail is prevented from coming out, and the surfaces of the fixed teeth and the rail are surface-finished without polishing burrs by only a predetermined polishing operation. Therefore, even a very small gap (several tens of microns) between the rail and the movable body can be finished with a predetermined size without secondary processing. Also, since the core body is integrated, the pitch accuracy of each magnetic pole position is improved,
High-precision positioning is possible.

[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;

[Explanation of symbols]

 1 Rail 1A Groove 2 Fixed Teeth 3 Wheel 4 Movable Body 5 Through Hole 8 Core Body 8a, 8b Core 9 Moving Teeth 15 Magnet 28-31 Coil A Adhesive

Claims (2)

[Claims] 1. A rail (1) having a fixed tooth (2) having a laminated structure on an upper portion thereof, and a wheel (3) traveling on the rail (1).
A movable body (4) having a plurality of moving teeth (9) at the bottom, a first coil (28) provided on the movable body (4), and a movable body (4) provided on the movable body (4) A linear step motor for a fiber knitting machine, which has a second coil (29) and is configured to move the movable body (4) by selective excitation to each of the coils (28, 29), 2) is a fiber knitting characterized in that the groove (1A) of the rail (1) is provided via an adhesive (A), and the fixed tooth (2) and the rail (1) are simultaneously polished. Linear step motor for machine. 2. The fiber knitting machine according to claim 1, wherein the core body (8) around which the coils (28, 29) of the movable body (4) are wound is integrally formed. Linear step motor.