JP2000092812A - Movable coil assembly of linear motor and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the driving efficiency of a movable coil assembly while heat generation and radiation are secured sufficiently by making the structure of the assembly simpler without declining the assembling strength of the coil group of the assembly and, at the same time, to reduce the number of manufacturing processes and, accordingly, the manufacturing cost of the assembly by reducing the numbers of used parts and materials and making the parts simpler. SOLUTION: A movable coil assembly 1 which is a component of a linear motor is manufactured in such a way that, after an adhesive 5 is applied to two base plates 3 arranged in parallel in the same plane and a plurality of coils 2 are placed on the plates 3 across the space formed between the plates 3, the coils 2 are integrally stuck to the plates 3 by evenly applying a pressurizing force to the coils 2. It is preferable that each base plate 3 is integrally molded of an L-shaped channel material. It is also possible to stick the coils 2 to the base plates 3 through insulating layers 4 formed on the upper surfaces of the plates 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving coil assembly for a linear motor and a method for manufacturing the same, and more particularly to a moving coil assembly for a linear motor applied to a linear motor for driving a line printer printing unit, and a method for manufacturing the same. It relates to a manufacturing method.

[0002]

2. Description of the Related Art A printing unit 9 provided in a line printer or the like.
The horizontal movement of 0 is driven by the linear motor mechanism 9. As shown in FIGS. 4 and 5, the drive unit 91 is arranged vertically at a predetermined interval, and a plurality of permanent magnets 92a and 92b each having a plurality of permanent magnets alternately arranged and fixed in opposite magnetic poles. And a movable coil assembly 93 that moves horizontally without touching each other.

Conventionally, as shown in FIG. 6, a movable coil assembly 93 is formed by winding a self-fusing wire on which an insulating film is formed into an elliptical flat shape having a predetermined thickness.
Is formed integrally with a resin mold 95 to form a unit 97, and a plurality of units 97 are connected to two connecting members 9
8, the power supply cable 99 is wired.

The unit 97 having such a configuration includes a coil 94
Is covered with an insulating resin mold 95 to secure the mechanical strength of the coil 94 and to secure electrical insulation between the connecting member 98 and the coil 94.

[0005] In addition, although not shown, there is also a unit configuration in which the coil 94 is fitted and accommodated in a coil case formed in a predetermined shape in advance and integrated.

[0006]

However, in the above-described movable coil assembly 93 having the conventional structure, the unit 97 is formed by wrapping the entire coil 94 in the resin mold 95 or by storing it in a coil case (not shown). Because
Dissipation of heat from the coil 94 during power supply movement is not sufficiently ensured, and the heat storage causes expansion or distortion of the unit 97 or peels off the coil 94 from the coil case, and in some cases, the coil Problems such as contact with the fixed permanent magnet group 92 have occurred.

Conventionally, in order to avoid this, a large clearance (gap) is provided between the upper and lower permanent magnet groups 92a and 92b at the expense of driving efficiency, and a large amount of adhesive is used to remove the adhesive. Was doing.

This causes a cost increase, and a further increase in the amount of input power for compensating for a decrease in drive efficiency due to the expansion of the clearance causes a further increase in the amount of heat generated.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and has a simple structure without lowering the mounting strength of a coil group of a movable coil assembly, thereby ensuring sufficient heat dissipation and driving. It is an object of the present invention to provide a moving coil assembly of a linear motor and a method of manufacturing the same, which can improve the efficiency, reduce the number of steps by using parts and materials, and simplify and thereby reduce the cost.

[0010]

In order to achieve the above object, the present invention is configured as follows. Note that the description may be provided with reference numerals, but this should not be construed as limiting the present invention.

That is, a plurality of coils (2) wound in a flat shape are arranged on the same surface between a plurality of permanent magnet groups each having a plurality of permanent magnets arranged and fixed at predetermined intervals above and below. The movable coil assembly (1) is a moving coil assembly (1) that is a component of a linear motor (9) that moves horizontally with a magnetic force without contact with the base plate (2). In 3), a plurality of coils (2) are arranged and fixed so as to be bridged.

When the coil (2) is fixed to the base plate (3), an insulating layer (4) is formed on the upper surface of the base plate (3), and the coil (2) is interposed with the insulating layer (4). Is fixed.

Preferably, each base plate (3) is integrally formed of an L-shaped channel material. Next, the movable coil assembly (1) of the linear motor has a base plate (3) arranged in parallel on the same surface, and an adhesive (5) is applied on the base plate (3). After the coil (2) is placed on the upper surface of the base plate (3) so as to span the coil (2), the pressing force applied to the base plate (3) is uniformly applied to the entire coil (2) while being fixedly integrated. Manufactured.

In this case, after the insulating layer (4) is formed on the upper surface of the base plate (3), the coil (2) may be fixedly integrated.

[0015]

According to the above structure, since the coil itself has a sufficient rigidity, it is arranged so as to be bridged over the base plate arranged in parallel and opposed to each other, and is fixedly integrated while ensuring insulation. Thereby, a movable coil assembly is configured. The mechanical strength of the movable coil assembly is equal to or higher than that of a conventional movable coil assembly using a coil resin integrated molding or a coil case housing, and the insulating property is sufficiently ensured.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment based on the configuration of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a partially exploded movable coil assembly of the embodiment of the present application, and FIG. 2 is a cross-sectional view taken along line AA of FIG.
FIG. 3 is an enlarged sectional view showing arrow B in FIG.

The movable coil assembly 1 includes a plurality of coils 2,
, And two base plates 3a and 3b opposed to each other, and the overall vertical and horizontal dimensions and thickness are set to be the same as those of the movable coil assembly 93 of the conventional example. ing.

The coil 2 has the same configuration as the above-described conventional coil 94, and is formed by winding a self-fusing wire 20 on which an insulating film is formed into an elliptical flat shape having a predetermined thickness. . The two base plates 3a and 3b are formed of a channel material having a L-shaped cross section having a predetermined length, and have an adhesive face plate 30 having a horizontal and flat surface, and a right angle to one longitudinal end of the adhesive face plate 30. And a standing face plate 31 formed upright. Base plate 3a on one side (front side in the drawing)
The height of the standing face plate 31a is set higher than the standing face plate 31b of the base plate 3b on the other side. This portion extends outward from the permanent magnet group 92 and is connected to the printing unit 90.

In assembling such components, first, two base plates 3a and 3b are arranged in parallel such that the adhesive face plates 30 face each other on the same plane. The interval is set such that the interval between the opposed standing face plates 31a and 31b is slightly larger than the length of the coil 2 in the major axis direction. In addition,
Prior to this, on the upper surface of the adhesive face plate 30 of the base plate 3,
Adhesion of fats and oils is eliminated by shot blasting or the like.

Next, an insulating adhesive 5 is thinly and uniformly applied on the upper surface of the adhesive face plate 30 and cured to form an insulating layer 4. Thereafter, the adhesive 5 is applied again, and a plurality of the .. Are mounted on the two base plates 3a and 3b so as to be bridged therebetween, and are adhesively fixed.

At this time, the coil 2 is cured while uniformly applying a pressing force to the base plate 3 to the entire coil 2. This is because, after being fixedly integrated, the coil groups 2, 2,.
This is because the upper surface of 2... Is maintained at the same level, and the entire warpage is prevented from occurring.

[0022]

[Possibility of Other Embodiments] The formation of the insulating layer 4 is not limited to the entire surface of the adhesive face plate 30 of the base plate 3 but may be limited to the portion where the coil 2 is mounted.

It does not matter which of the steps of forming the adhesive layer 4 and the step of arranging the base plate 3 is before or after. Further, the formation of the insulating layer 4 is preferable for securing the insulating property, but is not essential. When the insulating property can be sufficiently secured only by the adhesive 5 for bonding the coil 2, it is not necessary.

Further, although the formation of the insulating layer 4 is performed by the adhesive 5, the present invention is not limited to this, and another insulating material may be used.

[0025]

According to the above configuration, the present invention has the following effects. That is, effective cost reduction can be achieved by reducing the number of parts (coil resin integral molding or coil case, set screw, etc.) and simplifying the manufacturing and the process.

Further, since the coil resin integral molding or the coil case, which is conventionally required, is not required, and the molding die is not required, the initial cost can be reduced. Further, the reduction in the number of components leads to a reduction in weight and an improvement in drive efficiency, and as a result, an amount of power input is reduced, which has an effect of contributing to a reduction in required power and heat generation.

In addition, since the coil is not surrounded by the resin mold or the coil case as in the conventional example and is in an exposed state, the effect of dissipating heat can be improved.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view showing a movable coil assembly according to an embodiment of the present application.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of an arrow B in FIG. 2;

FIG. 4 is a perspective view schematically showing a linear motor mechanism used for driving a printing unit of the line printer.

FIG. 5 is a plan view showing an arrangement of magnets of the linear motor mechanism.

FIG. 6 is a perspective view showing the assembling of a movable coil assembly according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable coil assembly 2 Coil 20 Wire rod 3 Base plate 30 Adhesive surface plate 31 Standing surface plate 4 Insulating layer 5 Adhesive 9 Linear motor mechanism 90 Printing unit 91 Drive unit 92 (a, b) Permanent magnet group 93 Moving coil assembly 94 Coil 95 Resin mold 96 Compatible recess 97 Unit 98 Connecting member 99 Power supply cable

Claims (5)

[Claims] A plurality of coils (2) formed in a flat shape are arranged on a same surface between a group of permanent magnets each having a plurality of permanent magnets arranged and fixed at predetermined intervals above and below. In the movable coil assembly (1) which is a component of the linear motor (9) in which the movable coil assembly (1) moves horizontally without contact with magnetic force, two base plates ( 3) A movable coil assembly of a linear motor, wherein a plurality of coils (2) are arranged and fixed in such a manner as to bridge the coil. 2. In fixing the coil (2) to the base plate (3), an insulating layer (4) is formed on the upper surface of the base plate (3), and the coil (2) is interposed with the insulating layer (4). The movable coil assembly for a linear motor according to claim 1, wherein the movable coil assembly is fixed. 3. The moving coil assembly for a linear motor according to claim 1, wherein each base plate is integrally formed with an L-shaped channel material. 4. A plurality of flatly wound coils (2) are arranged on the same plane between permanent magnet groups each having a plurality of permanent magnets arranged and fixed at predetermined intervals vertically. The method for manufacturing a movable coil assembly (1), which is a component of a linear motor (9) in which the movable coil assembly (1) moves magnetically horizontally without contacting the base plate (3) on the same surface, The adhesive (5) is applied on the base plate (3) and then placed on the upper surface of the base plate (3) so as to bridge a plurality of coils (2). 3) A method for manufacturing a movable coil assembly of a linear motor, wherein a pressure applied to the coil (2) is uniformly applied to the entire coil (2) while being fixedly integrated. 5. The method for manufacturing a movable coil assembly for a linear motor according to claim 4, wherein an insulating layer is formed on an upper surface of the base plate, and the coil is fixedly integrated.