JP2010252466A - Electromagnetic coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an electromagnetic coil which dispenses with a bobbin and is which is easy to manufacture. <P>SOLUTION: An assembling jig is formed of pressing plates 3a, 3b and a winding core 4. Next, an insulating tape 6a is wound around the winding core 4, and a prepreg tape 7a is wound around the external periphery of the insulating tape. Furthermore, a self-fusing electric wire 5a is wound around external peripheries of the insulating tape 6a and the prepreg tape 7a. After that, by winding the prepreg tape 7b and the insulating tape 6b around the external periphery of a coil 5, and by carrying electricity to the self-fusing electric wire 5a, a self-fusion layer is hardened and firmly adhered, and resins of the prepreg tapes 7a, 7b are also heated and hardened. Then, by removing the pressing plates 3, by carrying electricity to the self-fusion electric wire 5a again and by heating the coil 5, the firmly-adhered coil 5 is drawn out of the winding core 4. Then, insulating sheets 8a, 8b, which correspond to the shape of the coil 5 are arranged at upper and lower sides of the coil 5, and an insulating tape 9 is wound around the coil 5 which is covered with the insulating sheets 8a, 8b, the insulating tapes 6a, 6b and the prepreg tapes 7a, 7b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electromagnetic coil used in an elevator hoist or an electromagnetic brake device.

  Conventionally, an electromagnetic coil used in an elevator hoist or an electromagnetic brake device is configured by winding a winding around a bobbin and attaching the bobbin to the fixed iron core in order to insulate the fixed iron core from the winding. is doing. In addition, a self-bonding electric wire is used for the winding, and the winding is fixed using self-bonding (see, for example, Patent Document 1).

  In addition, the conventional bobbinless electromagnetic coil tapers a core member that is an iron core with a prepreg tape (tape that has been heat-treated by impregnating resin into a semi-cured state) before winding, and insulates this prepreg tape. The winding is wound through the material. Further, a prepreg tape is taped to each layer of the winding to fix the winding (for example, see Patent Document 2).

  Furthermore, other conventional bobbinless electromagnetic coils have a fluororesin coating on the outer periphery of the conducting wire, and a polyester film tape with an adhesive layer is spirally wound around the outer periphery of the fluororesin coating to constitute a fluororesin insulated electric wire. A coil is formed by winding a fluororesin insulated wire (for example, see Patent Document 3).

JP 2007-195271 (paragraph 0015, FIG. 4) JP 2004-48917 A (paragraphs 0013 to 0014, FIGS. 1 and 4) Japanese Patent Laid-Open No. 10-172823 (summary column, FIG. 4)

  Since the electromagnetic coil disclosed in Patent Document 1 uses a bobbin for insulation between the fixed core and the winding, when the dimension of the fixed core is changed, a bobbin corresponding to the dimension is required. Become. In addition, the bobbin is generally formed of a resin molded product, which requires a molding die corresponding to a fixed iron core having different dimensions, which is uneconomical.

  Moreover, since the electromagnetic coil disclosed in Patent Document 2 is wound around the prepreg tape after being taped to the iron core, the winding cannot be mounted on the iron core in a state where the winding itself is wound. Is bad. The winding itself is wound in a process different from the process of attaching to the iron core, and the winding itself is attached to the iron core so that the production management is easier and the workability is better.

  Furthermore, the electromagnetic coil disclosed in Patent Document 3 does not require a bobbin for insulation between the fixed iron core and the coil. However, the insulated wire is coated with a fluororesin coating on the wire itself and further wrapped with a polyester film tape. It is necessary to configure. Therefore, the manufacturing process which performs the said insulation on electric wire itself is needed, and there exists a subject that manufacturing cost will increase.

  The present invention has been made to solve these problems, and an object thereof is to obtain an electromagnetic coil that does not require a bobbin and is easy to manufacture.

  The electromagnetic coil according to the present invention includes a coil formed by winding a self-bonding electric wire, a prepreg tape and insulating tape arranged on the inner and outer diameter sides of the coil, and upper and lower sides of the coil. And an insulating sheet, and a tape wound around both the structure and the insulating sheet.

  According to the present invention, an electromagnetic coil that does not require a bobbin and is easy to manufacture can be obtained.

It is a figure which shows the state which mounted | wore the fixed iron core with the electromagnetic coil which concerns on Embodiment 1 of this invention. It is a figure explaining the manufacturing process of the electromagnetic coil which concerns on Embodiment 1 of this invention. It is a figure explaining the manufacturing process of the electromagnetic coil which concerns on Embodiment 1 of this invention. It is a figure which shows the electromagnetic coil which concerns on Embodiment 1 of this invention. It is a figure which shows the electromagnetic coil which concerns on Embodiment 2 of this invention.

  Preferred embodiments of an electromagnetic coil according to the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIG.
FIG. 1 shows a state in which the electromagnetic coil according to Embodiment 1 is mounted on, for example, a fixed iron core of a brake of a hoisting machine, (a) is a plan view, and (b) is a cross-sectional view taken along line AA in FIG. FIG. As shown in FIG. 1, a notch 1a is formed around the upper portion of the fixed iron core 1, and an electromagnetic coil 2A manufactured by a method described later is attached to the notch 1a. An adhesive is filled between the electromagnetic coil 2 </ b> A and the fixed iron core 1 to fix the electromagnetic coil 2 </ b> A to the fixed iron core 1.

  Next, the configuration of the electromagnetic coil 2A and the manufacturing method thereof will be described with reference to FIG. 2, FIG. 3, and FIG. As shown in FIG. 2, first, an assembly jig is formed by the holding plates 3 a and 3 b and the core 4. The winding core 4 is formed in a shape corresponding to the inner diameter of the electromagnetic coil 2 </ b> A, and is attached so that the presser plates 3 a and 3 b protrude corresponding to the thickness of the coil 5. When the coil 5 is formed by this assembly jig, the inner coil shape and the thickness direction shape are maintained. This assembly jig corresponds to the shape of the fixed iron core 1 to which the electromagnetic coil 2A is attached.

  Next, the insulating tape 6a is wound around the outer periphery of the core 4, and the prepreg tape 7a is wound around the outer periphery of the insulating tape 6a, thereby forming a structure of the insulating tape 6a and the prepreg tape 7a. And the self-bonding electric wire 5a is wound around the outer periphery of the structure of the insulating tape 6a and the prepreg tape 7a. The self-bonding electric wire 5a is laminated and wound by a predetermined number of turns to form the coil 5. Thereafter, the prepreg tape 7b and the insulating tape 6b are sequentially wound around the outer periphery of the coil 5 to form a constituent body of the insulating tape 6b and the prepreg tape 7b. A varnish that is a self-bonding layer is attached to the self-bonding electric wire 5a.

  From this state, when the self-bonding electric wire 5a is energized, the self-bonding electric wire 5a is heated by energization, the varnish which is the self-bonding layer is cured and fixed, and the resin of the prepreg tapes 7a and 7b is also heat-cured. Is done. As a result, the shape of the coil 5 is maintained corresponding to the shape of the assembly jig, that is, the shape of the fixed iron core 1.

  Then, the presser plate 3 is removed, and the self-bonded electric wire 5a is energized again, and the coil 5 is heated, so that the coil 5 after fixing is fixed by utilizing the difference in the linear expansion coefficient between the coil 5 and the core 4. Pull out from the core 4. Thus, the coil 5 can be extracted from the winding core 4 without resistance by utilizing the difference in the linear expansion coefficient.

  Next, as shown in FIG. 3, insulating sheets 8 a and 8 b corresponding to the shape of the coil 5 are arranged on the upper and lower sides of the coil 5. And as shown in FIG. 4, the coil 5 covered with the structure of the insulating sheets 8a and 8b arranged on the upper and lower sides, and the insulating tapes 6a and 6b and the prepreg tapes 7a and 7b arranged on the inner and outer diameter sides. For example, the insulating tape 9 is wound in a spiral shape. The insulating tape 9 has an adhesive layer on the back side. The insulating tapes 9 are wrapped and wrapped. In this way, the electromagnetic coil 2A is manufactured.

  The electromagnetic coil 2A is held in a shape corresponding to the shape of the fixed iron core 1 by the prepreg tapes 7a and 7b and the self-bonding electric wire 5a without the coil 5 being separated. Further, the coil 5 is insulated by the insulating sheets 8a and 8b. Then, the insulating tape 9 is wound around the coil 5 to insulate the coil 5, and the shape of the electromagnetic coil 2 </ b> A is maintained and attached to the fixed iron core 1. 4A is a plan view of the electromagnetic coil 2A, and FIG. 4B is a cross-sectional view taken along the line BB in FIG.

  The electromagnetic coil 2A according to the first embodiment is configured as described above, and does not require a bobbin for insulation, and separates the manufacturing process of the electromagnetic coil 2A itself from the mounting process to the fixed iron core 1. Can be manufactured easily. Note that the insulating tapes 6a and 6b and the prepreg tapes 7a and 7b, which are arranged on the inner and outer diameter sides of the coil 5, have the insulating tapes 6a and 6b arranged on the inner and outer diameter sides of the coil 5, contrary to the above configuration. The prepreg tapes 7a and 7b may be arranged on the outer periphery. However, if the prepreg tapes 7a and 7b are arranged on the inner and outer diameter sides of the coil 5 and the insulating tapes 6a and 6b are arranged on the outer periphery thereof as in the first embodiment, the following effects are obtained.

  That is, the prepreg tapes 7a and 7b melt when the resin is heated and are cured when cooled. Therefore, when the insulating tapes 6a and 6b are disposed on the coil 5 side and the prepreg tapes 7a and 7b are disposed on the outer periphery thereof, the molten resin is welded to the core 4 when heated, and the coil 5 is It becomes difficult to remove from the core 4. On the other hand, when the prepreg tapes 7a and 7b are arranged on the coil 5 side and the insulating tapes 6a and 6b are arranged on the outer periphery thereof, the prepreg tape 7a is welded to the insulating tape 6a and the coil 5 is easily detached from the core 4. be able to.

  Further, since the self-bonding electric wire 5a and the prepreg tapes 7a and 7b are heat-cured by energizing the self-bonding electric wire 5a, a separate heating tool is not required and the workability is further improved.

Embodiment 2. FIG.
Next, the electromagnetic coil according to Embodiment 2 will be described. 5A and 5B are diagrams showing an electromagnetic coil according to Embodiment 2, wherein FIG. 5A is a plan view, and FIG. 5B is a cross-sectional view taken along the line CC in FIG.

  The electromagnetic coil 2B according to the second embodiment is different from the electromagnetic coil 2A according to the first embodiment in that the insulating tape wound around the outermost layer is wound, and the coil 5 is created in the same manner as in the first embodiment. The Then, the corners 4 corners serving as contact portions between the insulating sheets 8a and 8b on the upper and lower sides of the coil 5 and the insulating tapes 6a and 6b disposed on the inner and outer diameter sides of the coil 5 and the prepreg tapes 7a and 7b. Moreover, it insulates by sticking the 1st tape 10 along a periphery.

  Next, the second tape 11 is wound around several places on the circumference of the coil 5, that is, around a required portion. In addition, the 1st tape 10 affixed on the corner | angular part 4 corner is this clearance gap when there exists a clearance gap in the boundary part of insulating sheet 8a, 8b and the structure of insulating tape 6a, 6b and prepreg tape 7a, 7b. It is given to insulate.

  As described above, according to the electromagnetic coil 2 </ b> B according to the second embodiment, it is not necessary to wrap the second tape 11 around the entire coil 5, so that the usage amount of the second tape 11 can be reduced.

DESCRIPTION OF SYMBOLS 1 Fixed iron core 1a Notch part 2A, 2B Electromagnetic coil 3a, 3b Holding plate 4 Core 5 Coil 5a Self-bonding electric wire 6a, 6b, 9 Insulating tape 7a, 7b Pre-preg tape 8a, 8b Insulating sheet 10 1st tape 11 Second tape

Claims (3)

A coil formed by winding a self-bonding electric wire;
A prepreg tape and an insulating tape component disposed on the inner and outer diameter sides of the coil,
Insulating sheets disposed on the upper and lower sides of the coil;
A tape wound around both the structure and the insulating sheet;
An electromagnetic coil comprising: A coil formed by winding a self-bonding electric wire;
A prepreg tape and an insulating tape component disposed on the inner and outer diameter sides of the coil,
Insulating sheets disposed on the upper and lower sides of the coil;
A first tape affixed to a portion where both the structure and the insulating sheet abut,
A second tape for fixing the structure and the insulating sheet at a required portion;
An electromagnetic coil comprising:   The electromagnetic coil according to claim 1, wherein the prepreg tape is disposed on the coil side, and the insulating tape is disposed via the prepreg tape.

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