JPH069574Y2 - Winding device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a winding device, and more particularly, to winding uniformly on an annular core having a plurality of protrusions on its outer circumference or inner circumference. The present invention relates to a winding device that can be used.

(Prior Art) A DC brushless motor (toroidal motor) is used as a motor for rotating a polygon mirror in a laser beam printer.

This DC brushless motor is provided with a stator including an annular core having a plurality of protrusions on its outer or inner periphery and a coil (toroidal coil) wound between the protrusions.

The method of winding the coil between the protrusions formed on the annular core will be briefly described below.

FIG. 3 is a diagram for explaining an example of a conventional method for winding a toroidal coil.

In FIG. 3, a plurality of protrusions 10 are formed at equal intervals on the outer circumference of the annularly shaped core 1A.

The coil winding device for the core 1A supports the core 1A,
It is provided with a plurality of rollers 4 for rotating and coil winding means (not shown) for winding between the respective protrusions 10.

The core 1A is arranged inside each of the rollers 4 and is supported by the rollers 4.

When at least one of the rollers 4 rotates at a constant angular velocity, the core 1A rotates, and the coil 3 is wound between the predetermined protrusions 10 of the core 1A.

(Problems to be Solved by the Invention) The conventional techniques described above have the following problems.

That is, the roller 4 that rotates the core 1A is
Since it is in direct contact with the outer periphery of the core and the protrusion 10 formed on the outer periphery, even when the roller 4 rotates at an equal angular velocity, when the roller 4 is in contact with the outer periphery of the core 1A. The angular velocity of the core 1A is different when it is in contact with the protrusion 10. Therefore, the uniform winding cannot be performed on the core 1A.

Further, as indicated by reference numeral 4A in FIG. 3, when the core 1A is rotating, the roller floats from the core 1A due to the step due to the protrusion 10, and then the core 1A comes off from the roller 4. There is a risk. In this case, winding cannot be performed.

The present invention has been made to solve the above problems.

(Means and Actions for Solving Problems) In order to solve the above problems, the present invention exposes at least a pair of protrusions of the core that face the protrusions of the core and that are adjacent to each other. The winding jig is constituted by a C-shaped ring having a cutout portion, and a means for bringing a rotating roller into contact with the C-shaped ring is provided. Then, by rotating the roller at an equal angular velocity, the core 1A
Can be rotated at a constant angular velocity at all times, and the roller cannot be lifted from the jig, so that the core can always be reliably supported.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of the essential parts of the first embodiment of the present invention.

In FIG. 1, an annular core 1A having protrusions 10 formed at equal intervals on its outer peripheral portion is fitted in a jig 2A.

The jig 2A has a C-shape in which a part of a cylindrical body is cut out so that the inner diameter thereof is substantially the same as the diameter of an imaginary circle including each tip of the protrusion 10 formed on the core 1A. It's a ring. The notch portion indicated by reference numeral 5A is the jig 2
When the core 1A is fitted inside A, the core 1A
The size (length) is set so that a space between the pair of adjacent protrusions 10 (hereinafter, referred to as a coil winding region) is exposed from the jig 2A.

The jig 2A in which the core 1A is fitted in this way is arranged inside a plurality of rollers 4 of the coil winding device which are arranged at predetermined positions in advance, and at least one of the rollers 4 is moved at a constant angular velocity. If rotated, the core 1A can also be rotated at a constant angular velocity.

Therefore, if the coil 3 is wound in the coil winding region of the core 1A when the core 1A is rotated, the winding can be performed uniformly.

When the winding of the coil winding area corresponding to the cutout portion 5A of the jig 2A is completed, the cutout portion is moved to the coil winding area adjacent to the coil winding area where the winding is completed, and similarly. Wind the wire.

Now, the inner diameter of the jig 2A may be smaller or larger than the diameter of the imaginary circle including each tip of the protrusion 10. When the inner diameter of the jig 2A is larger than the diameter of the imaginary circle, a plurality of rollers 4 for supporting and rotating the jig 2A are biased toward each other inward by springs or the like. By elastically deforming the jig 2A so that the protrusion 2 of the core 1A and the protrusion 10 of the core 1A come into close contact with each other, the core 1A can be favorably rotated.

When the inner diameter of the jig 2A is smaller than the diameter of the virtual circle, the coil winding region to be exposed from the jig 2A and the notch portion 5A can be easily positioned.

FIG. 2 is a plan view of the second embodiment of the present invention.

In FIG. 2, the protrusion 10 is formed on the inner peripheral portion of the core 1B. Then, the jig 2 is provided in the core 1B.
B is fitted.

The jig 2B is formed by cutting out a part of a cylindrical body whose outer diameter is substantially the same as the diameter of an imaginary circle including each tip of the protrusion 10 formed on the core 1B. It is a ring of shape. The notch portion indicated by the reference numeral 5B is formed in the core 1B when the jig 2B is fitted inside the core 1B.
The size is set so that the coil winding region is exposed inside the jig 2B.

The jig 2B fitted in this way is arranged outside the plurality of rollers 4 of the coil winding device, which are arranged at predetermined positions in advance, and at least one of the rollers 4 is rotated at an equal angular velocity. By doing so, the core 1B can also rotate at a constant angular velocity.

Therefore, the coil 3 can be wound uniformly.

The outer diameter of the jig 2B may be smaller or larger than the diameter of an imaginary circle including each tip of the protrusion 10.
When the outer diameter of the jig 2B is smaller than the diameter of the imaginary circle, a plurality of rollers 4 for supporting and rotating the jig 2A are urged toward each other by springs or the like, and the rollers 4 are If the jig 2B is elastically deformed so that the tool 2B and the protrusion 10 of the core 1B come into close contact with each other, the core 1B can be favorably rotated.

When the outer diameter of the jig 2B is larger than the diameter of the virtual circle, the coil winding region to be exposed from the jig 2B and the notch portion 5B can be easily positioned.

Now, in FIGS. 1 and 2, the notches 5A and 5B of the jigs 2A and 2B are drawn so as to expose only one coil winding region of each core 1A and 1B. Is not particularly limited to this,
The notch may be formed so that two or more coil winding regions are exposed.

In this way, if the notch is formed so that the coil winding region is exposed by two or more, the number of times the relative position of the core and the jig is displaced when the coil is wound over the entire circumference of the core can be reduced. Since the number is reduced, the winding work of the coil can be efficiently performed.

(Effects of the Invention) As is apparent from the above description, according to the present invention, the following effects are achieved.

That is, a winding jig is constituted by a C-shaped ring, the winding jig is opposed to a protrusion formed on an annular core, and the winding jig is formed by a plurality of rollers. Since the core is rotated by supporting and rotating at least one of the rollers at a constant angular velocity, rotation of the core, in other words, feeding is always performed at a constant angular velocity. You can

As a result, the coil can be wound uniformly.

Further, since the C-shaped ring has elasticity, the same C-shaped ring can be used for cores of a plurality of standards in which the diameter of the inner circumference or the outer circumference of the wound core is slightly different. One C-ring can be shared by multiple standard cores.

Further, since the roller does not float from the jig during the above-mentioned rotation, there is no fear that the core will come off the roller.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention, FIG. 2 is a plan view of a second embodiment of the present invention, and FIG. 3 illustrates an example of a conventional toroidal coil winding method. FIG. 1A, 1B ... core, 2A, 2B ... jig, 3 ... coil, 4 ... roller, 5A, 5B ... notch, 10 ... protrusion

Claims (1)

[Scope of utility model registration request] 1. A winding device for a core having a plurality of protrusions on its outer circumference or inner circumference, wherein a pair of protrusions facing said protrusions and adjoining at least one of said cores on the protrusion side of said core. A winding comprising: an elastic C-shaped ring having a notch portion for exposing a space; and a roller that abuts on the C-shaped ring and rotates a core fitted to the C-shaped ring. Line device.