JP2003245888A - Magnet bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnet bar where a wired rubber part is not deformed and the rubber part can be adsorbed and held at a predetermined position. <P>SOLUTION: The magnet bar is provided with a first planar magnetic substance 11 disposed on a surface on which the wired rubber part is held, a second planar magnetic substance 12 which catches a wood piece 13 and is disposed opposite to the first planar magnetic substance 11, a planar magnet 14 which is disposed between ends 11a, 12a in longitudinal directions of the first and second planar magnetic substances 11, 12 and is polarized in the longitudinal directions of the first and second planar magnetic substances 11, 12 and a yoke material 15 comprising a soft magnetic substance disposed while the soft magnetic substance contacts one magnetic force operating surface 14a of the planar magnet 14. The wired rubber part is adsorbed and held by concentrating the magnetic force in only the vicinity of the end of the side of the planar magnet 14 in the planar magnetic substances 11, 12. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet bar for attracting a member containing a magnetic metal such as a rubber part containing a wire.

[0002]

2. Description of the Related Art Conventionally, in a tire manufacturing process, for example, positioning of a rubber component containing a wire such as a belt in which a steel cord is coated with a rubber material in a conveying process and straightening and holding a rubber component bent by a warp twist Alternatively, when handling a rubber component containing wires, magnetic force acting surfaces (N magnetic pole surface and S magnetic pole surface) are staggered as shown in FIGS. 3 (a) and 3 (b), for example. A magnet bar 50 formed by arranging a plurality of bar magnets 51 and 52 so as to have a shape is used.

[0003]

However, in the conventional magnet bar 50, as shown in FIG. 3B, the magnetic force is large near the center of the magnetic force acting surface of each of the bar magnets 51 and 52. As shown in FIG. 4 (a), the wire 1
Since the wire 1w is adsorbed in the vicinity of the center of the magnetic force acting surface when adsorbing the wire-containing rubber component 1 in which w is covered with rubber, the holding position is the predetermined holding position shown by the broken line in FIG. There was a problem that it slipped off. Further, when the rubber component 1 with wire is implanted and aligned and jointed, the rubber component with wire previously aligned is displaced, and an accurate joint cannot be obtained. In addition, in the magnet bar 50 shown in FIG.
As shown in, since the end of the rubber component 1 with a wire, particularly the end piece 1k, is attracted to the magnetic center of the magnetic force acting surface of the bar magnets 51, 52, the vicinity of the end piece 1k is bent. After the release, it was necessary to correct the deformation of the rubber component 1 with a wire with a guide plate or the like. Therefore, a method may be considered in which the bar magnets 51 and 52 are further subdivided so that the magnetic pole spacing is physically close to reduce the bendable range.
When the bendable range is reduced, the suction force and the suction force are reduced accordingly, so that handling is also difficult.

The present invention has been made in view of the problems of the prior art, and provides a magnet bar capable of adsorbing and retaining a rubber component at a predetermined position without deforming the rubber component containing a wire. The purpose is to provide.

[0005]

According to a first aspect of the present invention, there is provided a magnet bar, wherein a magnet whose magnetization direction is parallel to a surface holding an object and one end of which is located on the object holding surface side of the magnet. A holding object including a magnetic metal such as a rubber part with a wire, which has a plate-shaped magnetic body extending in the magnetizing direction of the magnet, and concentrates the magnetic force only in the vicinity of the end of the plate-shaped magnetic body on the magnet side. Is sucked and held, which makes it possible to suck and hold the holding target at a predetermined position (near the end) without deforming the holding target. .

According to a second aspect of the present invention, there is provided a magnet bar, wherein a yoke material made of a soft magnetic material is disposed on a magnetic pole surface of the magnet opposite to an extending direction of the plate-shaped magnetic material. The magnetic force is concentrated on the central portion of the object holding surface, which makes it possible to further improve the accuracy of the holding position of the object to be held.

In the magnet bar according to a third aspect of the present invention, a plurality of magnets having a magnetization direction parallel to a surface holding an object are arranged in a direction perpendicular to the magnetization direction and the object holding surface, and a plate is formed. -Shaped magnetic body is arranged so that its end is located on the object holding surface side of each magnet, and soft magnetism is provided on the magnetic pole surface on the side opposite to the protruding direction of the plate-shaped magnetic body of each magnet. A yoke member composed of a body is arranged.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are views showing the configuration of a magnet bar 10 according to the present embodiment, where FIG. 1A is a plan view and FIG. 1B is a sectional view taken along line AA of FIG. Is. In each figure, 11 is a first plate-shaped magnetic body provided on an object holding surface for holding a wire-containing rubber component, and 12 is a non-magnetic piece of wood 13 sandwiching the first plate-shaped magnetic body. A second plate-shaped magnetic body 11 arranged to face the body 11, 14 is the first and second plate-shaped magnetic bodies 11 and 12
Of the Nd-Fe-B-based rare earth alloys magnetized in the length direction of the first and second plate-shaped magnetic bodies 11 and 12 arranged between the end portions 11a and 12a in the length direction. Magnet,
Reference numeral 15 is a yoke member made of a soft magnetic material arranged in contact with one magnetic force acting surface (S magnetic pole surface) 14a of the plate magnet 14, and 16 is the first and second plate magnetic materials 11, 1.
2. The case is made of a non-magnetic material that houses the wood piece 13, the plate magnet 14, and the yoke material 15.

In the magnet bar 10 having the above-described structure, the plate-shaped magnet 14 is used as a magnetomotive force, and is formed of a first plate-shaped magnetic body 11, a yoke member 15, and a second plate-shaped magnetic body 12. A magnetic circuit in the shape of is formed. Therefore,
First plate-shaped magnetic body 1 located on the surface corresponding to the holding object
As shown in FIG. 1 (b), the magnetic force from 1 is applied to the yoke member 1 at the end 11 a of the plate-shaped magnetic body 11 on the plate-shaped magnet 14 side.
It is large near the center of 5 and small at the other end 11b. Specifically, since the magnetic force lines from the plate magnet 14 enter the yoke material 15 which is a soft magnetic material, there is almost no magnetic field outside the S magnetic pole surface 14a. On the other hand, on the side of the N magnetic pole surface 14b, the magnetic force lines are guided to the plate-shaped magnetic bodies 11 and 12, and as a result, the magnetic force of the surface corresponding to the object to be held is the yoke of the first plate-shaped magnetic body 11. Concentrate near the center of the material 15. Therefore, as shown in FIG. 2, since the wire-containing rubber component 1 in which the wire 1w is covered with rubber can be adsorbed in the vicinity of the end 11a of the plate-shaped magnetic body 11, the end of the wire-containing rubber component 1 can be absorbed. The piece 1k can be stably held at the corner of the magnet bar 10 at a predetermined holding position without being deformed. Further, since the magnetic force is small in the central portion 11c and the other end portion 11b of the plate-shaped magnetic body 11, the wire 1 of the held rubber component 1 with wire is retained.
It does not adversely affect w. Furthermore, since the magnetic bar 10 of this example has a small magnetic force distribution, the wire tip can be stably straightened and held even if the cut angle of the rubber component 1 with a wire is a high angle close to 90 °. .

In the above embodiment, the yoke material 15 is used.
Is composed of one soft magnetic plate.
You may each attach to the magnetic pole surface 14a. On the contrary,
The plate-shaped magnetic bodies 11 and 12 may be a single plate-shaped magnetic body. Further, in the above example, the magnet bar 10 for holding the rubber component with the wire has been described. However, by applying this to the positioning of the rubber component with the wire in the conveying process, the accuracy of the holding position of the rubber component with the wire is improved. It is possible. Further, the magnet bar 1 of the present invention
With 0, the rubber component containing the wire can be accurately held at the predetermined holding position, so that the guide member after the conveyance can be omitted. Further, if it is a lightweight part, the magnet bar 10 having the above-described configuration can be used as a handling arm.

[0011]

As described above, in the magnet bar of the present invention, the magnet whose magnetization direction is parallel to the surface holding the object and one end of which is located on the object holding surface side of the magnet, Since a plate-shaped magnetic body extending in the magnetization direction is provided, the magnetic force is concentrated only near the end of the plate-shaped magnetic body on the magnet side so that a holding object containing a magnetic metal is attracted and held. The object to be held can be stably attracted and held at the corners of the magnet bar without being deformed.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a magnet bar according to the present embodiment.

FIG. 2 is a view showing a holding state of a rubber component containing a wire by a magnet bar of the present invention.

FIG. 3 is a diagram showing a configuration of a conventional magnet bar.

FIG. 4 is a diagram showing a holding state of a rubber component containing a wire by a conventional magnet bar.

[Explanation of symbols]

10 magnet bar, 11 first plate-shaped magnetic body, 12
2nd plate-shaped magnetic body, 13 wood pieces, 14 plate-shaped magnets, 1
4a S magnetic pole surface, 14b N magnetic pole surface, 15 yoke material,
16 cases.

Claims (3)

[Claims] 1. A magnet having a magnetization direction parallel to a surface holding an object, and a plate-shaped magnetic body having one end located on the object holding surface side of the magnet and extending in the magnetization direction of the magnet. A magnet bar characterized by that. 2. The magnet bar according to claim 1, wherein a yoke member made of a soft magnetic material is disposed on a magnetic pole surface of the magnet opposite to an extension direction of the plate-shaped magnetic material. . 3. A plurality of magnets having a magnetization direction parallel to a surface holding an object are arrayed in a direction perpendicular to the magnetization direction and the object holding surface, and a plate-shaped magnetic body is provided for each magnet. While arranging so that its end is located on the object holding surface side,
A magnet bar, wherein a yoke member made of a soft magnetic material is disposed on a magnetic pole surface of each magnet opposite to a protruding direction of the plate-shaped magnetic material.