JPS61272905A - Magnet-incorporating method - Google Patents

Abstract

PURPOSE:To enable to smoothly insert a magnetic band by a method wherein rubber magnetic bands, on which a roughing work is performed on the surface in advance, are inserted into rounding dies using a push plate. CONSTITUTION:A plurality of rubber magnetic bands 1, on which a roughing work is performed on the surface in advance, are placed on the prescribed position, the rear part of the lead rubber magnetic band 1A is pushed by a push plate 2. Said magnetic band 1A is guided by the guide roller and the like which is not illustrated in the diagram, and the band 1A is inserted into the guide 5 of a rounding dies 4. Then, the band 1A makes progress along the inner circumference of the rounding dies 4 and it is annularly formed in the dies 4. Subsequently, the band 1A is shifted to a motor case 6 from the dies 4 while the inside diameter of the band 1A is being corrected. As a roughing work is performed on the bands 1, they can be smoothly inserted into the dies 4 in the state that the bands 1 are not adhered each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for incorporating a magnet, in particular, by applying unevenness to the surface of a smooth and flexible rubber magnet band, it is possible to prevent adjacent Reduce the contact area with the rubber magnet band.

This invention relates to a method for incorporating a magnet that allows smooth insertion into a rounding die.

(Prior Art and Problems to be Solved by the Invention) Generally, the stator of a small motor is constructed from a flexible rubber magnet band. In order to automatically roll up a rubber magnet band serving as a stator into an annular shape and insert it into a motor case, a method as described in the embodiment described later is used. That is, first, a plurality of rubber magnet strips are loaded in close contact with each other in a predetermined position, and only one of the rubber magnet strips placed in close contact with each other is sequentially inserted into a rounding die using a push plate. The rubber magnet band is formed into an annular shape and is inserted into the motor case using a push rod. However, since the surface of the rubber magnet strip is smooth, the conventional method of loading multiple rubber magnet strips in close contact causes the surfaces of adjacent rubber magnet strips to stick together, making it difficult to insert them into the rounding die smoothly. There was a problem. Therefore, attempts have been made to sprinkle powder or the like on the surface of the rubber magnet bands in order to prevent the rubber magnet bands from adhering to each other. As a result, the adhesion between the rubber magnet bands is somewhat relaxed, but after being incorporated into the motor, the powder has a negative effect on other parts of the motor, such as the commutator and brushes. I understand.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems and shortcomings, and therefore, the magnet assembling method of the present invention includes a plurality of flexible rubber magnet bands in advance. The rubber magnetic strips are loaded in a predetermined position in close contact with each other so as to overlap one another, and then moved one by one and inserted one by one into a rounding die using a pushing plate to form the rubber magnet band into an annular shape, and then pushed out into the motor case using a pushing rod. In the method for incorporating a magnet, the rubber magnet band is characterized in that a rubber magnet band whose surface has been subjected to a roughening process in advance is used as the rubber magnet band, and the rubber magnet band is inserted into a rounding die by the pushing plate. It is said that This will be explained below with reference to the drawings.

(Example) Fig. 1 is an explanatory diagram for explaining one embodiment of the magnet assembling method of the present invention, and Figs. 2 (a) to d) each show improved magnet assembling methods of the present invention. FIG. 3 shows a partially enlarged view of an example of a conventional rubber magnet band.

In the figure, 1 represents a plurality of rubber magnet bands, 2 a pushing plate, 3 a pushing rod, 4 a rounding die, 5 a guide, and 6 a motor case.

In the magnet assembling method shown in FIG. 1, the rubber magnet band IA, which is at the top of the plurality of rubber magnet bands 1 loaded at a predetermined position, is first pushed with its rear part by the tip of the pushing plate 2, and the rubber magnet band IA is pushed by the tip of the push plate 2 and is move in the direction. The moving rubber magnet band IA is guided by a guide roller (not shown) and inserted into a guide 5 provided in a rounding die 4. The rubber magnet band IA inserted into the guide 5 provided in the rounding die 4 is pressed at the rear by the pushing plate 2, so it progresses along the inner circumference of the rounding die 4 and is formed into an annular shape inside the rounding die 4. be done. Next, a rubber magnet band I is formed into an annular shape in the rounding die 4.
A is moved from the rounding die 4 to the motor case 6 while its inner diameter is corrected by the push rod 3. That is, the first rubber magnet band IA is now installed in the motor case 6, and one cycle of magnet installation is completed.

By the way, in the above-mentioned magnet assembly cycle, since the surface of the conventional rubber magnet strip as shown in FIG. , IB, IC, . . . adhere to the surfaces of adjacent rubber magnet bands, the movement of the rubber magnet bands to the rounding die 4 will not proceed smoothly.

Therefore, in the present invention, Fig. 2 (a) to d)
As shown in the figure, the surface of the rubber magnet band has (a) first knurling, (b) flat knurling, (C) corrugations,
(d) By creating shallow irregularities (patterns) such as stars, the contact area between the rubber magnet bands is reduced.
The rubber magnet band can be smoothly moved to the rounding die 4. Of course, the unevenness formed on the surface of the rubber magnet band may be other than those shown in FIG. 2 (a) to d).

(Effects of the Invention) As explained above, according to the present invention, it becomes possible to smoothly incorporate the rubber magnet bands into the motor case one after another without adversely affecting other parts of the completed motor.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram for explaining an embodiment of the magnet embedding method of the present invention, and Fig. 2 (a) to d) are improved as the magnet m embedding method of the present invention. FIG. 3 shows a partially enlarged view of an example of a conventional rubber magnet band. In the figure, 1 represents a plurality of rubber magnet bands, 2 a pushing plate, 3 a pushing rod, 4 a rounding die, 5 a guide, and 6 a motor case.

Claims (1)

[Claims] A plurality of flexible rubber magnet strips are loaded in advance in a predetermined position in close contact with each other so as to overlap one another, and while being sequentially moved, the rubber magnet strips are inserted one by one into a rounding die using a pusher plate to form the rubber magnet strips into a ring shape. In the method of assembling a magnet in which the magnet is formed and then pushed into the motor case by a pushing rod, a rubber magnet strip whose surface has been textured in advance is used as the rubber magnet strip, and the rubber magnet strip is pushed into the motor case by the pushing plate. A method of incorporating a magnet characterized by inserting it into a rounding die.