JP7738243B2 - Panel with a soft magnetic plane and method for installing said panel on a non-magnetic wall surface - Google Patents

Description

The present invention relates to a panel having a flat surface made of soft magnetic material and a method for installing the panel on a non-magnetic wall. More specifically, it relates to a panel having a flat surface that uses magnetic attraction to hold items, and an installation method for installing the panel on a non-magnetic wall, transforming a non-magnetic wall that would not normally attract magnets into a wall that does attract magnets.

Magnetic panels have become popular in recent years. Magnetic panels are wall materials that can attract magnets. When used as a wall surface, they can detachably attach items such as picture frames, whiteboards, and shelves with magnets attached to the backside using magnetic force. Magnetic panels do not require parts such as mounting brackets to secure these items, and no tools are required for fastening. This allows the original wall surface to be maintained while allowing for free and easy rearrangement (see Patent Document 1).
Magnetic panels are achieved by, for example, attaching or mounting a soft magnetic material to a non-magnetic substrate. The panels are said to be flame-retardant or non-combustible, and the non-magnetic substrate provides the panel's rigidity.

JP 2017-36650 A Utility Model Registration No. 3140291

On the other hand, the main method for transforming non-magnetic wall surfaces, such as plasterboard or wooden walls, which are not originally magnet-attractive, into walls that are magnet-attractive is to fasten magnetic panels to the existing non-magnetic wall with screws or nails. For example, Patent Document 2 discloses a wall structure that can attach heavy objects to walls made of plasterboard or other materials with high strength. In this wall structure, fixing pins are driven at an angle, and metal fittings with pilot holes for guides are attached and driven into the pins. This technique can also be used to attach the magnetic panels mentioned above, but since separate metal fittings are required, the number of parts increases, the structure becomes more complicated, and the overall weight and cost increase. Furthermore, it is time-consuming to drive the pins at the appropriate angle.

The present invention was made in response to the above-mentioned circumstances, and aims to provide a panel with a soft magnetic plane that transforms non-magnetic wall surfaces, such as gypsum boards and wooden walls that magnets would not normally adhere to, into surfaces that do adhere to magnets. The panel has a simple structure, is lightweight, and can be manufactured inexpensively, and can be easily installed on non-magnetic wall surfaces.

The present invention takes the following measures to solve the above-mentioned problems. Note that the parenthesized symbols attached to each component means in this section (the "Means for Solving the Problems" section) are for reference purposes only to show the correspondence with the specific means described in the representative embodiments described below, and do not limit the component means of the present invention to these.

One aspect of the present invention is a panel (P1, P2, P3) comprising a thin soft magnetic plate made of a soft magnetic material, characterized in that it has a triangular or polygonal plane (4, 41), at least two sides of which have side surfaces (7, 71) bent from the plane (4, 41) at an angle of 20 degrees to 60 degrees, and the soft magnetic plate forming the side surface (7, 71) is further bent so as to be parallel to the plane (4, 41) to form a bottom surface (8, 81).

Another aspect of the present invention is characterized in that the side surface (7, 71) is provided with a small hole (3, 31) that penetrates the side surface from the front surface to the back surface.

In another aspect of the present invention, the tip (80, 810) of the bottom surface (8, 81) is located in a direction perpendicular to the side surface (7, 71) from the position of the small hole (3, 31) provided in the side surface (7, 71).

In another aspect of the present invention, the panels (P1, P2, P3) are made by punching or other processing a soft magnetic plate that resembles its development and then bending it.

Another aspect of the present invention is characterized in that a reinforcing material (2, 21) such as plastic, plastic foam, or wood is attached to the back side of the flat surface (4, 41).

Another aspect of the present invention is characterized in that the surface of the soft magnetic plate is coated or painted.

Another aspect of the present invention is characterized in that an opening (16) is provided in a portion of the flat surface (4) of the soft magnetic plate, and a ferromagnetic sheet (40) is attached to the non-opening portion (17) of the flat surface (4) so as to cover this opening (16).

Another aspect of the present invention is a method for installing a panel (P1, P2, P3) on a non-magnetic wall surface (5, 51), characterized in that the tip of a pin (6) or nail passed through a small hole (3, 31) drilled in the side surface (7, 71) is used to locate the tip (80, 810) of the bottom surface (8, 81), and the pin (6) or nail is then pushed into the non-magnetic wall surface (5, 51).

This invention creates a panel with a soft magnetic surface that transforms non-magnetic wall surfaces, such as gypsum boards and wooden walls that magnets would not normally adhere to, into surfaces that do. The panel has a simple, lightweight, and inexpensive structure, and can be easily installed on non-magnetic wall surfaces.

1 is an external perspective view showing an example of use of a panel according to a first embodiment of the present invention; 1A and 1B are perspective views showing the structure of a panel of a first embodiment, in which FIG. 1A shows a view from the front side and FIG. 1B shows a view from the back side. 1A and 1B are two-dimensional views of the panel of the first embodiment as viewed from three directions, in which FIG. 1A is a front cross-sectional view, FIG. 1B is a plan view as viewed from the front side, and FIG. 1C is a bottom view as viewed from the back side. 10A to 10C are side cross-sectional views showing the procedure for installing the panel of the present invention on a non-magnetic wall surface. FIG. 10 is a side cross-sectional view illustrating the state when an article is attached to the panel by a magnet after installation. FIG. 10 is a development view of a soft magnetic sheet of a panel according to a second embodiment. FIG. 10 is a perspective view showing a state in which a panel of a second embodiment is installed on a non-magnetic wall surface that forms the side surface of a cylinder. 10A and 10B are perspective views of a panel according to a third embodiment, in which FIG. 10A is an external view and FIG. 10A and 10B are perspective views of modified examples of the main body used in the panel of the third embodiment, in which FIG. 10A shows a first modified example, and FIG. 10B shows a second modified example. 1A and 1B are perspective views showing a panel removal aid, in which FIG. 1A shows a state when the panel is not being removed, and FIG. 1B shows a state when the panel is being removed.

First Embodiment
FIG. 1 is a perspective view showing an example of use of a panel P1 according to a first embodiment of the present invention. FIG. 2 is a perspective view showing the structure of the panel P1 according to the first embodiment, where (a) is a view from the front side, i.e., the side where an item is magnetically attracted, and (b) is a view from the back side, i.e., the side that contacts a non-magnetic wall. FIG. 3 is a two-dimensional view of the panel P1 according to the first embodiment viewed from three directions: (a) is a front cross-sectional view, (b) is a plan view of the panel P1 in (a) as viewed from the front side, i.e., the direction of the arrow A, and (c) is a bottom view of the panel P1 in (a) as viewed from the back side, i.e., the direction of the arrow B. FIG. 4 is a side cross-sectional view showing the procedure for installing the panel P1 according to the present invention on a non-magnetic wall surface 5, and FIG. 5 is a side cross-sectional view illustrating the state of an item L magnetically attached to the panel P1 after installation. Note that hatching has been omitted from the cross-sectional views.
Furthermore, in these drawings, the covering materials and paint on the panel surface are omitted. Furthermore, even if the same numeral is used, for parts that are easier to distinguish in explanation or in relation to other drawings, a lowercase alphabet such as "a" or "b" is added immediately after the numeral. Furthermore, in this specification, "magnetic adsorption" may be simply referred to as "magnetic adhesion."

As shown in Figure 1, panel P1 is attached to a non-magnetic wall surface 5 such as a plasterboard or wooden wall to transform a wall surface that would not normally attract a magnet into a wall surface that attracts a magnet, i.e., a wall surface (magnetic wall surface) that uses magnetic attraction to hold an item L, and as shown in Figures 2 and 3, it has a main body 1 and a reinforcing material 2. The item L may be an item with a magnetic sheet or sintered magnet attached to the backside, such as a hook, accessory, or small item shelf.
The main body 1 is made of a soft magnetic plate of a predetermined thickness, and as shown in Figures 2 and 3, has a plane 4, side surfaces 7a provided as a pair on both the top and bottom of the plane 4, side surfaces 7b provided as a pair on both the left and right of the plane 4, bottom surfaces 8a provided as a pair on the top and bottom of the plane 4, and bottom surfaces 8b provided as a pair on the left and right of the plane 4.

The soft magnetic plate used in the present invention is made of magnetic steel (for example, SS400), magnetic stainless steel (for example, SUS416), etc., and although there are no particular restrictions on its thickness, a thickness of 0.2 to 0.5 mm is particularly preferred.
A thick sheet has sufficient mechanical strength, but is difficult to process into panels and is heavy, which is undesirable. Conversely, a thin sheet is lightweight and easy to punch and bend, but tends to reduce mechanical strength and the magnetic attraction of the permanent magnet to the panel, making it difficult to achieve the object of the present invention.
In the examples described below, a rolled magnetic steel plate having a thickness of 0.35 mm was used.

The soft magnetic plate may be surfaced or painted before being processed into a panel, but may also be surfaced or painted in the finishing stage after processing.
However, if the thickness of the surface material or coating exceeds 0.2 to 0.3 mm, the magnetic attraction force may decrease depending on the type of permanent magnet that is magnetically attached to the panel.

As shown in FIG. 3, the plane 4 has a rectangular shape with long sides 40a and short sides 40b, and the front side is the surface that attracts the magnet.
The pair of side surfaces 7a are inclined at a certain angle (approximately 50 degrees, see θ in FIG. 5) by bending the opposing long sides 40a on the plane 4 toward the rear side, and form an isosceles trapezoidal shape that widens when viewed from the long sides 40a.
The pair of side surfaces 7b are inclined at a certain angle (approximately 50 degrees) by bending the opposing short sides 40b of the plane 4 toward the rear side, forming an isosceles trapezoidal shape that widens toward the end when viewed from the short sides 40b. These angles are approximately 50 degrees, but may be any angle between 20 degrees and 60 degrees.
The pair of bottom surfaces 8a are parallel to the plane 4 by bending the opposing long sides 70a of the side surfaces 7a backward, and form an isosceles trapezoidal shape tapering toward the end when viewed from the long sides 70a.
The pair of bottom surfaces 8b are parallel to the plane 4 by bending the opposing short sides 70b of the side surfaces 7b backward, and form an isosceles trapezoidal shape tapering toward the end when viewed from the short sides 70b.

Here, the pair of bottom surfaces 8a and the pair of bottom surfaces 8b are on the same plane parallel to plane 4. Furthermore, side surfaces 7a and 7b each have small holes 3a and small holes 3b that penetrate from the front to the back at a 90-degree angle. Five small holes 3a are provided on the upper side surface 7a, spaced evenly along a straight line that follows the length of the isosceles trapezoid, while three small holes 3a are provided on the lower side surface 7a, spaced evenly along a straight line that follows the length of the isosceles trapezoid. Furthermore, three small holes 3b are provided on the left and right side surfaces 7b, spaced evenly along a straight line that follows the length of the isosceles trapezoid.

5, the tip 80a of the bottom surface 8a is located in the direction perpendicular to the side surface 7a from the small hole 3a, and the tip 80b of the bottom surface 8b is located in the direction perpendicular to the side surface 7b from the small hole 3b. In other words, the tip 80a of the bottom surface 8a is located in the direction of the central axis 14a of the small hole 3a, and the tip 80b of the bottom surface 8b is located in the direction of the central axis 14b of the small hole 3b.
The small holes 3 a and 3 b are holes for inserting pins 6 (see FIG. 4 ) that are sharp and have a large-diameter head at the rear end, for fixing to the non-magnetic wall surface 5 .

The reinforcing material 2 is incorporated into the backside of the flat portion of the panel P1. The reinforcing material 2 is a plate material such as plastic, its foam, or wood, and preferably has a low specific gravity. The reinforcing material 2 is a plate-like body that prevents the flat surface 4 from collapsing unstably. It is fixed to the backside of the flat surface 4 with, for example, double-sided adhesive tape or glue, thereby increasing the mechanical strength of the panel P1. The reinforcing material 2 has a rectangular or slightly smaller bottom surface area that can be formed by the ends 80a, 80b of the bottom plate 8 on the backside (see Figure 3).

Next, a method for installing the panel P1 of the present invention on the non-magnetic wall surface 5 will be described.
In Figure 4, once you have determined the position on the non-magnetic wall surface 5 where you will install the panel P1 of the present invention, support the panel P1 with one hand while using the other hand to insert the pin 6 into the small hole 3a in the side surface 7a, and use the tip of the pin 6 to find the tip 80a on the bottom surface 8a. At this time, make sure that the pin 6 is approximately perpendicular to the side surface 7a where the small hole 3a is drilled. Once this is confirmed, push the head of the pin 6 vertically toward the side surface 7a. You can ask someone else to do the pushing and driving work, but if the non-magnetic wall surface 5 is gypsum board, for example, you can place a 10-yen coin on it and push it in with your finger.

The pin 6 at the bottom of FIG. 4 is shown pressed into the non-magnetic wall surface 5 .
FIG. 5 shows a state in which the panel P1 is installed on the non-magnetic wall surface 5, and a relatively light weight W of an article L moored on the panel P1 hangs downward.
Because the soft magnetic plate has rigidity, the weight W is transmitted to the pin 6 that is in contact with the bottom surface 8a at the tip 80a, and is supported by the pin 6 fixed to the wall surface. Here, the pin 6 is angled upward by 20 degrees or more relative to the wall surface, so it can provide firm support.

It is preferable to provide many small holes 3 for passing the pins 6 on the upper (vertical) side surface 7a of the installed panel P1, because the more pins 6 that are pushed in, the greater the load-bearing capacity.
On the other hand, it is important to fasten at least the other side surfaces 7 with pins 6. This is because panel P1 will be fastened at the vertices of a triangle formed by both ends of the pins 6 aligned in a straight line above plane 4 and other points that are not on the straight line. For this reason, pins 6 are passed through the small holes 3a on the lower side surface 7a and the small holes 3b on the side surface 7b in the same manner.

The panel P1 of the present invention is made by cutting a magnetic steel plate or magnetic stainless steel plate of a specified thickness into a specified shape using laser irradiation or a punching method, and then bending it in sequence. The small holes 3 to be provided on the side surfaces 7 are also drilled at this time.

The plane 4 of the panel P1 of the present invention is bounded by at least two straight edges, namely the long side 40a and the short side 40b. Its shape may be a square, rectangle, rhombus, or polygon with pentagons or more, or a triangle, but it may also have curved portions. Incorporating curves allows for a variety of design expressions, making wall designs and exhibits more impactful. However, it is physically impossible to simply bend the parts that correspond to the sides of the curved portions, and additional ingenuity is required. It is also an option to not form side surfaces 7.

As mentioned above, the panel P1 of the present invention is designed to be fastened by pressing the pins 6 into the non-magnetic wall surface 5. However, because the back surface of the bottom surface 8 is flat, it can be conveniently and easily installed on walls where the pins 6 are not useful, using a double-sided adhesive sheet or adhesive.

Before installing panel P1 on a non-magnetic wall, it is recommended to apply protective tape 13 (see Figure 1) to the areas 12 adjacent to the edges of the soft magnetic plate, the folded areas 10, and the areas 9 adjacent to the folded areas (see Figures 3(b) and 3(c)). This is to prevent injury during installation from burrs and corners that may occur during the manufacturing of panel P1.

In this way, with panel P1, the pin 6 can be inserted through the small hole 3 in the side surface 7, found at the tip 80 on the bottom surface 8, and then pushed in at this point, allowing for the pin 6 to be tilted at the appropriate angle, ensuring reliable and easy installation. Furthermore, the flat surface 4, which serves as the magnet's attraction surface, and the side surface 7, which serves as the part for securing the flat surface 4, are made from a single piece, resulting in a simple, lightweight structure that can be manufactured inexpensively.

Second Embodiment
The panel of the present invention can be adapted to the side surface of a cylindrical pillar. Fig. 6 is a development view of the main body 11 of the panel P2 of the second embodiment. Fig. 7 is a diagram showing the state in which the panel P2 of the second embodiment is installed on a non-magnetic wall surface 51 that forms the side surface of a cylinder. The main body 11 in the development view shown in Fig. 6 is made of the same material as that used in the first embodiment.

As shown in FIG. 7, the panel P2 has a main body portion 11 and a reinforcing member 21.
As shown in the development view of Fig. 6, the main body 11 has a flat surface 41, a side surface 71a provided above the flat surface 41, a pair of side surfaces 71b provided as a pair on both the left and right sides of the flat surface 41, a bottom surface 81a provided at the end of the side surface 71a, and a pair of bottom surfaces 81b provided as a pair on both the left and right sides at the end of the pair of side surfaces 71b. This development view is folded to form the following approximately flat shape. Note that in the description of Figs. 6 and 7, the surface designated by the reference numeral "41" is not strictly a flat surface but a cylindrical side surface, i.e., a "curved surface," but for convenience, it will be referred to as a "flat surface" in this specification.

The plane 41 is a rectangular plane body, and the front side serves as a magnetic attraction surface for the magnet.
The side surface 71a is bent backward at the center of one long side of the flat surface 41 at a fixed angle (approximately 50 degrees), forming an isosceles trapezoidal shape tapering toward the end when viewed from the long side.
The pair of side surfaces 71b are formed by bending opposing short sides of the plane 41 toward the rear side at a fixed angle (approximately 50 degrees) to form a rectangular shape.
The bottom surface 81a is parallel to the flat surface 41 by bending the short sides of the side surface 71a toward the rear side, forming a rectangular shape.
The pair of bottom surfaces 81b are formed in a rectangular shape by bending the opposing long sides of the side surface 71b backward to be parallel to the plane 41.

Here, the bottom surface 81a and the pair of bottom surfaces 81b are on the same plane parallel to the plane 41. The side surfaces 71a and 71b are provided with small holes 31a and 31b that penetrate from the front side to the back side at a 90-degree angle.
A tip 810a of the bottom surface 81a is located in a direction perpendicular to the side surface 71a from the small hole 31a, and a tip 810b of the bottom surface 81b is located in a direction perpendicular to the side surface 71b from the small hole 31b.
The small holes 31a and 31b are holes for inserting headed pins 6 (only a part of the small hole 31b is shown in FIG. 7) for fixing to the non-magnetic wall surface 51.
Such a panel P2 can be installed on the curved surface of a cylinder by bending and curving the flat surface 41 and the reinforcing material 21.
The side surface 71a and bottom surface 81a of the curved portion have a shape indicated by reference numeral 15 in FIG. 6, for example, according to the curvature of the curve and the thickness of the panel P2.

The side surface 71a and bottom surface 81a corresponding to the curved portion are bent at the end portions of the flat surface 41. As a result, the end portions of the flat surface 41 cannot be curved along the curved surface of the cylinder, and are inevitably slightly distorted.
Therefore, as shown in Figure 6, the curved portion may have only one side surface 71a and one bottom surface 81a, or may not have any. In this figure, an example is shown in which the other sides (opposite sides) of the plane 41 are omitted.

The load on this panel P2 can be fully supported by the pins 6 that are pushed in through the small holes 31 in the side surfaces 71. Furthermore, as shown in Figure 7, the flat surfaces 41 are curved along the side surfaces of the cylinder, and a reinforcing material 21 is attached between the cylindrical wall surface 51 and the flat surfaces 41, increasing mechanical strength.

Third Embodiment
The panel of the present invention can be made of a soft magnetic sheet as well as a metal soft magnetic plate as a magnetic surface. Figure 8 is a perspective view of a panel P3 of the third embodiment, where (a) shows an external view and (b) shows an exploded view.
The panel P3 of the third embodiment differs from the panel P1 of the first embodiment in the following respects: the panel P3 has a main body 111 instead of the main body 1 of the panel P1, and also has a soft magnetic sheet 40.

The main body 111 has an opening 16 penetrating from the front to the back of the flat surface 4 of the main body 1, but the other components, i.e., the side surface 7, bottom surface 8, and small holes 3, are the same as those of the panel P1. The same is true for the reinforcing material 2.
The soft magnetic sheet 40 is fixed to the non-opening portion (the edge portion around the opening 16) 17 of the plane 4 so as to cover the opening 16. For example, an adhesive is used for the fixing.
The soft magnetic sheet 40 does not itself have the properties of a permanent magnet, but is a flexible sheet to which a magnet can be attracted. It is made by forming a mixture of fine powder of soft magnetic material and a small amount of organic polymer elastomer, which acts as a binder, into a sheet having a thickness of 0.5 to 2 mm using a forming method such as rolling or extrusion.

The soft magnetic material powder can be a ferromagnetic material with low coercivity and high permeability (hereinafter referred to as "ferromagnetic powder"), a ferromagnetic material with low coercivity and high permeability (hereinafter referred to as "ferrimagnetic powder"), or a mixture of ferromagnetic and ferrimagnetic powders. Ferromagnetic powders can be iron powder, magnetic stainless steel powder, sendust powder, etc. Ferromagnetic powders can be soft ferrites such as manganese zinc ferrite powder, nickel zinc ferrite powder, and magnetite powder (iron oxide powder).

The small amount of organic polymer elastomer used as the binder can be, for example, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene rubber, nitrile rubber, acrylic rubber, or chloroprene rubber. An example of such a soft magnetic sheet 21 is Iron Sheet (registered trademark) manufactured by the applicant company. Instead of the soft magnetic sheet 21, a magnetic sheet can be used, which is a sheet made from a mixture of fine powder of a hard magnetic material and an organic polymer elastomer used as the binder, and has at least one surface magnetized. In other words, any ferromagnetic sheet will do.

In the panel P3 of the third embodiment, the soft magnetic sheet 40 performs the magnetic attraction function of the flat surface 4 in the panel P1 of the first embodiment. That is, the surface 42 of the soft magnetic sheet 40 serves as the magnet attraction surface.
The soft magnetic sheet 40 has a smaller specific gravity than a metal plate and can provide a relatively strong magnetic force even with the same thickness, thereby enabling the panel to be made lighter.

Furthermore, when using this configuration, by placing a power transmission coil through which high-frequency current flows on the back surface of the soft magnetic sheet 40 and magnetically attaching a light-emitting item equipped with a power receiving coil and a magnet piece to the front surface of the soft magnetic sheet 40, it is possible to create an illumination system in which the light-emitting item can be magnetically attached to any position on the magnetically attached surface and illuminates via wireless power supply. In this case, the soft magnetic sheet 40, and by extension, the ferromagnetic sheet, are advantageous for the following reasons: When applying wireless power supply, if a power transmission coil is placed on the back surface of a metal plate, power supply efficiency decreases and heat is generated. While power can be supplied to a thin metal plate with a thickness of approximately 0.1 mm, mechanical strength cannot be ensured. Therefore, a main body 111 with an opening 16 on the flat surface 4 is used, and this opening 16 is covered with a non-metallic ferromagnetic sheet 40 instead of the flat surface of the metal plate to create a magnetically attracted surface.

Here, since a large area of the opening 16 reduces the rigidity of the main body 111 and decreases the mechanical strength, it is preferable that the area of the opening 16 be 80% or less of the area of the flat surface 4. Furthermore, in order to supplement the strength of the main body, reinforcing bars 18, 19 may be provided to connect opposing non-opening portions 17 in a manner bridging the opening 16, as shown in Figure 9. It is also possible to omit the reinforcing bars 18, 19 and keep the rigidity low, making it easier to attach to a curved surface.
The method for installing the panel P3 on the non-magnetic wall surface 5 is the same as that for the panel P1, and therefore will not be described here.

As described above, the panels P1, P2, and P3 of the present invention can be easily attached (set up) to a wall by applying protective tape, and are also easy to remove and change the layout, allowing for work with a true DIY feel.
Furthermore, if the base is plasterboard, the pins attaching the panel can be pulled out with bare hands (fingers), and the holes left after removal are small and barely noticeable.

The panel of the present invention can be used to create any wall display depending on the combination with the item L. For example, it can be used as simple decoration in a store, to display small items, or even to tether a flat-screen TV to display videos, etc.

In addition, the panels of the present invention can aim for non-combustible certification. The metal soft magnetic plate or thin soft magnetic sheet itself is non-combustible, and if the surface material, paint, and reinforcing material are changed to non-combustible materials, the combination of these elements is likely to make it possible for the panel to be certified as non-combustible.

In order to reduce the effort required to pull out the pins 6 one by one, it is also possible to use a removal aid X as shown in FIG.
The removal aid X is made of a metal wire such as stainless steel having a thickness of 0.2 mm to 0.8 mm. This metal wire passes through the small holes 3a, 3b in the two adjacent side surfaces 7a, 7b that are closest to each other at the four corners, and has its open ends connected to form a ring shape.
When the panel is not being removed, as shown in Figure 1(a), the pulling portion X1 of the metal wire is placed on the back side of the corner so that it is not noticeable, and when removing it, as shown in Figure 1(b), a fingernail or a pointed tool is used to expose the pulling portion X1 on the front side, and by pulling it toward you in the normal direction of the non-magnetic wall surface 5, it is possible to remove multiple pins 6 all at once. Such removal aids X may be provided at all four corners of the panel, or only at some of them.

A white-painted rolled steel plate (0.35 mm thick) manufactured by Nippon Steel Corporation was cut into a rectangular shape with notches at the four corners and folded to produce a panel P1 having a square flat surface 4 with a side length of 30 cm.
The angle formed between the side surface 7 and the plane 4 is 45 degrees, and the side surface 7 is further folded to form the bottom surface 8. At this time, the bottom surface 8 is formed by folding in a width of 10 mm.
The side surface 7 has a width of approximately 14.2 mm, and a small hole 3 with a diameter of 1 mm is opened in the center thereof. The tip of the bottom surface 8 is positioned in a direction perpendicular to the side surface 7 from the small hole 3.
A total of three small holes 3 were made in the center of the side surface corresponding to the length of one side (30 cm) of the flat surface 4, and at positions 5 mm from both ends of the 30 cm side toward the center.

The reinforcing material 2 was made by cutting out a square of foamed PS (polystyrene; expansion ratio 50 times) with a side length of 30 cm and a thickness of 1 cm, and attaching it to the back of the flat surface 4 with double-sided adhesive tape.
At this time, the panel weight was about 320 g.

Next, the panel P1 was attached to the wall surface of the gypsum board in the following manner.
Specifically, a commercially available FANYBRAND flat-head pin (2.2mm diameter, 0.9mm long, unichrome plated) was inserted through the small hole on the side and the tip of the pin was found. The pin was roughly perpendicular to the side. Next, a 10-yen coin was placed on the head of the pin and pushed down with the thumb.
Three pins were used on the upper side of the panel, and two pins were used on the lower side and on both sides.

The panel installed on the plasterboard was gently pushed parallel to the wall surface, but it did not budge. In this example, a commercially available magnet was used to anchor the memo paper to the flat surface of the panel. A magnetic hook was also attached and a load of 6 kg was applied to the hook, but the hook remained attached to the panel and did not come off, and no abnormalities were found in the panel.

The panel of the present invention can be used to transform part or all of a non-magnetic wall surface, such as a plasterboard wall or a wooden wall, into a surface that attracts magnets. This panel is also convenient for use at home to post memos and contact lists, and in companies, schools, and government offices. Furthermore, this panel is easy to install.

DESCRIPTION OF SYMBOLS 1 Main body 2 Reinforcement material 3 Small hole 4 Flat surface 5 Non-magnetic wall surface 6 Pin 7 Side surface 8 Bottom surface 9 Adjacent area of folded portions 10 Folded area 11 Main body 12 Adjacent area of edges of soft magnetic plate or sheet 14 Cylindrical wall surface 15 Side surface and bottom surface corresponding to curved portion 21 Reinforcement material 31 Small hole 40 Soft magnetic sheet 41 Flat surface 51 Non-magnetic wall surface 71 Side surface 81 Bottom surface 111 Main body P1 Panel P2 Panel P3 Panel

Claims (6)

A panel comprising a thin soft magnetic plate made of a soft magnetic material, the panel having a triangular or polygonal plane, with at least two sides of the plane each having a side bent at an angle of 20 degrees to 60 degrees from the plane, the soft magnetic plate forming the side being further bent so as to be parallel to the plane to form a bottom surface , a small hole being formed in the side surface that penetrates the side surface from the front surface to the back surface, and the tip of the bottom surface being located in a direction perpendicular to the side surface from the position of the small hole . 2. The panel having a flat soft magnetic surface according to claim 1, wherein the panel is made by processing a soft magnetic plate having a developed view thereof by punching or the like and then bending the plate . 2. A panel having a flat soft magnetic material surface according to claim 1, wherein a reinforcing material such as plastic, a foamed plastic material, or wood is attached to the back side of said flat surface . 2. The panel having a flat soft magnetic surface according to claim 1, wherein the surface of the soft magnetic plate is coated or painted . A panel comprising a thin soft magnetic plate made of a soft magnetic material, the panel having a triangular or polygonal plane, at least two sides of the plane each having a side bent at an angle of 20 degrees to 60 degrees from the plane, the soft magnetic plate forming the side being further bent so as to be parallel to the plane to form a bottom surface, an opening being provided in part of the plane of the soft magnetic plate, and a ferromagnetic sheet being attached to a non-opening part of the plane so as to cover the opening . 2. A method for installing the panel according to claim 1 on a non-magnetic wall surface, comprising: locating the tip of the bottom surface with the tip of a pin or nail passed through a small hole drilled in the side surface; and then pushing the pin or nail into the non-magnetic wall surface.