JPS6148381A - Clamping of plastic magnet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for fixing a plastic magnet to an object to be attached, such as a mattress or a hanging bed.

[Conventional technology]

Conventionally, there are the following methods for attaching plastic magnets.

One of them is a method in which a plastic magnet is molded into a special shape as a clay pipe structure, for example, into a shape having protrusions or recesses.

Another method is to attach an accessory to a plastic magnet, and then attach the accessory to the plastic magnet.

For example, as shown in FIG. 7, an engaging recess (11) is formed on the back surface of a substantially hemispherical plastic magnet 00), and a circumferential recess with an enlarged diameter is formed at the opening periphery of the engaging recess (11). A stepped edge (12) is provided, and a nylon plate (13) that fits into this six-step edge (12) is removed, and this circumferential recessed step i!
In (12), it is integrally welded to the ultrasonic welder. Then, a hole (14) is opened in the center of the nylon plate (13), and a male stopper (15) is inserted into it.
It is configured to attach a plastic magnet α0) to the fabric (16).

Furthermore, there is a method of bonding plastic magnets with an adhesive or the like.

[Problem that the invention seeks to solve]

However, in the above conventional method, in order to fix the plastic magnet, it is necessary to process the magnet into a special shape, or it is necessary to attach accessory parts to the plastic magnet, or it is necessary to use adhesive etc. separately. I needed it.

The present invention specifically processes plastic magnets,
Alternatively, it is an object of the present invention to provide a fastening method that can easily fasten the plastic magnet to various objects of use by attaching attached parts and welding the plastic magnet itself without using an adhesive. purpose.

[Means and effects for solving the problem] In order to achieve the above object, the present invention involves welding a plastic magnet made by mixing and molding a magnetic material and a resin material with all or part of the resin material in the plastic magnet. An ultrasonic welder is used to weld the object to be adhered, which includes a resin material that can be used. By this method, plastic magnets can be easily attached to various types of objects.

〔Example〕

The present invention will be explained below based on embodiments shown in the drawings.

In Fig. 1, (1) is a plastic magnet, and the plastic magnet (1) is made by mixing and molding a magnetic material such as iron oxide and a resin material such as nylon.

It's ours.

Further, (2) is an adhered body such as a resin plate made of nylon to which the plastic magnet 7 is attached.

The present invention substantially comprises the above-mentioned plastic magnet (1).
It is characterized in that it is welded, that is, melted and bonded to the object to be adhered (2) using an ultrasonic welder.

Therefore, it is necessary that the resin material of the adherend (2) and at least part of the resin material of the plastic magnet (1) are compatible with welding. Various materials with welding compatibility are shown, including:

Table 1 shows that for various resin materials such as styrene and AS, the best suitability is for those made of the same material.

Therefore, it is desirable to form the plastic magnet (1) by blending the same resin material as that of the adherend (2).

However, even if the materials are not the same, as shown in Table 1, if they are compatible, that is, they can be dissolved and combined with each other,
It can also be made of different materials.

Further, as the hard magnetic material to be mixed into the plastic magnet (1), it is preferable to use the following materials.

That is, ferrite (BaO-n F+403, S
iO・nFe2O3 etc.), rare earth Ti (SmCOs
, Sm2C0, etc.), alnico (AQ-Hi-CO)
It is.

By suitably blending these hard magnetic materials with the resin material, the magnetic force of the plastic magnet (1) can be uniformly adjusted.

Furthermore, in the present invention, the plastic magnet (1) is attached to the adherend (2) by an ultrasonic welder using the properties of the resin materials themselves, so that the plastic magnet (1) and There are no limitations on the shape or form of the outerwear of the object to be attached (2) to which it is attached.

That is, the plastic magnet (1) and the adhered object (2)
The form of fastening is not limited to the form shown in FIG. 1, but may also be the form shown in FIGS. 2 to 6, for example.

Figure 2 shows an adhered body made of a flexible thin resin sheet (
This is an example in which a plastic magnet (1) is welded to 2).

FIG. 3 shows an example in which a plastic magnet (1) is welded to an adherend (2) made of a foamable resin.

FIG. 4 shows a case where a plastic magnet (11) is welded to an adherend (2) made of a lump of resin.

FIG. 5 shows an example in which a plastic magnet (1) is welded to an adherend (2) consisting of a resin tip rod. In this case, the welded portion between the plastic magnet (1) and the adhered object (2) becomes a curved surface, but since they are melted and bonded using an ultrasonic welder, welding can be easily achieved.

In addition, Fig. 6 shows an intermediate inclusion (3) such as urethane foam, which is a material for pillows, etc., on the adherend (2) made of nonwoven fabric, etc.
), a plastic magnet (1) is placed on the intermediate inclusion (3), and then the plastic magnet (1) is welded to the adherend (2). According to this method, it is possible to easily produce a quilt or the like having a plastic magnet (1).

〔Effect of the invention〕

As explained above, in the present invention, the plastic magnet is attached directly to the object to which it is attached using an ultrasonic welder, which greatly simplifies the shape of the plastic magnet and the object to which it is attached. The fastening work can be done easily and inexpensively. Furthermore, since it is not welded, the adhesion strength can be improved.

[Brief explanation of drawings]

FIGS. 1 to 6 are explanatory diagrams of various fixing structures for plastic magnets according to the fixing method according to the present invention, and FIG. 7 is an explanatory diagram of a conventional fixing structure for plastic magnets. (1) Niblastic magnet (2): Covered body (3); Intermediate inclusion patent applicant Japan Health Promotion Research Group Co., Ltd. (Baka 1
given name)

Claims (1)

[Scope of Claims] 1. A plastic magnet formed by mixing and molding a magnetic material and a resin material is applied with an ultrasonic welder to an adherend including a resin material that can be welded to all or part of the resin material in the plastic magnet. A method for attaching plastic magnets, characterized by welding using a plastic magnet. 2. A plastic magnet made by mixing and molding a magnetic material and a resin material is attached to an adherend containing a resin material that can be welded to all or part of the resin material in the plastic magnet, through an intermediate inclusion such as urethane foam. A method for attaching plastic magnets, characterized by welding using an ultrasonic welder.