Magnetic wall hanging system

Abstract

To provide a magnetic wall hanging system and a hanging tool that can obtain a relatively large load capacity with a simple configuration.SOLUTION: A magnetic wall hanging system includes a magnetic wall surface formed by pasting a wall magnet sheet on a wall surface forming a substantially vertical plane, and a suspension tool attached with a suspension magnet sheet 71, and the magnetic wall surface is magnetically attracted to the suspension magnet sheet 71, both the wall magnet sheet and the suspension magnet sheet 71 are multi-pole magnetized with the same magnetization pitch on their surfaces, and a magnetization line 74X formed by a boundary portion between an arbitrary magnetic pole 72 and an adjacent magnetic pole 73 on the surface of the suspension magnet sheet 71 is substantially horizontal, and the suspension magnetic sheet 71 has a neutral region 75 in which a part of the lower layer portion of the vertical width of each of the magnetic poles 72, 73 is not magnetized or is demagnetized at the magnetic poles 72 and 73 located in the substantially upper half in the vertical direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a magnetic wall hanging system. More specifically, it relates to a system that can ensure the non-combustibility of the wall surface and can hang articles on the wall using magnetic attraction and repulsion forces.

Background Art

[0002] As one of the systems for hanging articles on a wall using magnetic attraction force, Patent Document 1 discloses a configuration including a magnetically adsorbed decorative board and a hanging tool (implement) provided with a magnetic sheet. This hanging tool is detachably hung on the magnetically adsorbed decorative board by magnetic force, and examples of its application to a hanging hook, a bookshelf, etc. are shown.

[0003] In the hanging tools used in the above-mentioned systems, in order to ensure a greater load-bearing capacity, efforts have been made to increase the magnetic attraction force, or to increase the frictional force by coating or pasting an adhesive material on the surface of a magnetic body such as a magnetic sheet. For example, Patent Document 2 discloses a hanging tool that combines a strong permanent magnet magnetically adsorbed on a soft magnetic wall surface and an anti-slip elastic body. On the other hand, Patent Document 3 magnetically adsorbs a display piece provided with a magnetic sheet magnetized at the same pitch as this magnetic sheet on a wall surface pasted with a multi-pole magnetized magnetic sheet having multi-pole magnetization applied to its surface.

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] However, due to wall surface contamination, deterioration of the elastic body, or dirt in the technology of Patent Document 1, it may become impossible to obtain sufficient static frictional force. Furthermore, Patent Document 2 requires a special permanent magnet and results in a cumbersome fixture. Also, in the technology of Patent Document 3, it functions well for a display sheet or a light load, but when the load increases, the magnetic attracting force becomes weak and a sufficient friction coefficient cannot be ensured, so the fixture falls off.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a magnetic wall hanging system that has a simple configuration and can obtain a relatively large load-bearing capacity.

Means for Solving the Problems

[0007] The present invention takes the following means to solve the above problems. Note that the reference numerals in parentheses attached to each constituent means in this column (the column of "Means for Solving the Problems") are for reference to show the correspondence with the specific means described in the embodiments described later, and the constituent means of the present invention are not limited thereto.

[0008] One aspect of the present invention includes a magnetic wall surface (11) formed by attaching a wall surface magnet sheet (21) to a wall surface forming a substantially vertical plane, and a fixture (70) equipped with a fixture magnet sheet (71). In a magnetic wall hanging system (1) formed by magnetically attracting the fixture magnet sheet (71) to the magnetic wall surface (11), both the wall surface magnet sheet (21) and the fixture magnet sheet (71) are multi-pole magnetized with the same magnetization pitch on the surface. A magnetization line (74X) formed by the boundary between any one magnetic pole (72) and its adjacent magnetic pole (73) on the surface of the fixture magnet sheet (71) is substantially horizontal. The fixture magnet sheet (71) has a neutral region (75) in which a part of the lower layer portion of the vertical width of each of the magnetic poles (72, 73) located in the substantially upper half in the vertical direction is not magnetized or is demagnetized.

[0009] In another aspect of the present invention, the hanger (70) includes a back plate (77) provided with a hanger magnet sheet (71) on the back surface, and a mounting plate (78) integrated orthogonally with the back plate (77).

[0010] In another aspect of the present invention, the hanger magnet sheet (71) has the neutral region (75) in the magnetic poles (72, 73) whose vertical length is located in at least 1 / 4 and at most 3 / 4 of the total length measured from the uppermost end (U0).

[0011] In another aspect of the present invention, the neutral region (75) is in a narrow strip shape parallel to the magnetization line (74X) of the hanger magnet sheet (71) and having a minute width, and is formed in the range between the lowermost ends (72D, 73D) of the magnetic poles (72, 73) of the hanger magnet sheet (71) and a region that is 0.1 mm or more and at most 1 / 10 of the vertical width of the magnetic poles (72, 73) from the lowermost ends (72D, 73D).

Advantages of the Invention

[0012] According to the present invention, a magnetic wall hanging system with a relatively simple configuration and capable of obtaining a relatively large load-bearing capacity is provided.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiment for Carrying Out the Invention

[0014] FIG. 1 is a perspective view showing the magnetic wall-mounted system 1 of the present invention, (a) is an external view, and (b) is a partial exploded view. FIG. 2 is a two-dimensional view of the magnet sheet 21 on the magnetic wall 10 side in the magnetic wall-mounted system 1 of the present invention, (a) is a front view, and (b) is a side view. FIG. 3 is a two-dimensional view of the magnet sheet 71 on the hanger 70 side in the magnetic wall-mounted system 1 of the present invention, (a) is a front view, and (b) is a side view. In these figures including the figures to be described later, the three axes of the orthogonal coordinate system are set as XYZ, and the wall surface 11 of the magnetic wall 10 is perpendicular to the XY plane and parallel to the ZX plane. Also, the scales of the respective figures are not necessarily accurate, and some of the elements are merely drawn for the purpose of making the present invention easier to understand.

[0015] As shown in FIG. 1(a), the magnetic wall-mounted system 1 of the present invention includes a magnetic wall 10 and a hanger 70, and the magnet sheet 21 provided on the magnetic wall 10 and the magnet sheet 71 provided on the hanger 70 are magnetically attracted to each other, so that the hanger 70 is configured to be hung on the wall surface 11 of the magnetic wall 10.

[0016] As shown in FIG. 1(b), the magnetic wall 10 includes a magnetic wall material sheet 20, a soft magnetic board 30, and a wall base 40.

[0017] The magnetic wall material sheet 20 is configured such that a wall material film 25 is laminated on the magnet sheet 21 via, for example, a urethane-based adhesive.

[0018] The magnet sheet 21 is a flexible sheet-shaped magnet with a thickness of 80 μm to 400 μm. As shown in FIG. 2, on each of its front and back surfaces, magnetic poles 22 and 23 (N pole and S pole) with different polarities and a certain width are alternately formed at equal intervals in a striped pattern, and it has a double-sided multi-pole magnetization type with magnetization lines 24X at a certain pitch. Here, the magnetization line 24X refers to an imaginary boundary line between any one magnetic pole 22 on the surface of the multi-pole magnetized magnet sheet 21 and the adjacent magnetic pole 23 with a different polarity. In reality, it is a portion that appears white when a magnetic view sheet (a film in which microcapsules of magnetic fluid are uniformly dispersed) is adhered, and it is a region where the magnetic field in the normal direction of the magnet sheet surface, that is, the direction perpendicular to the surface, is extremely weak or zero. That is, the magnetization line 24X means an imaginary line on the sheet surface. In the present invention, the magnetization line 24X is located at both ends in the thickness direction of the magnet sheet 21 in a side view.

[0019] Here, the reason for setting the thickness of the magnet sheet 21 within the above range is to ensure fireproof and heat-resistant properties and magnetic holding force. That is, if it exceeds 400 μm, it becomes difficult to ensure fireproof and heat-resistant properties, and if it is less than 80 μm, sufficient magnetic holding force cannot be expected. Also, the double-sided multi-pole magnetization type is adopted because appropriate magnetic adsorption force is required for both the front and back surfaces. That is, one surface of the magnet sheet 21 faces the indoor space side and functions to magnetically adsorb and hold a display piece or a hanger such as a shelf with a ferromagnetic body (either one having or not having the properties of a magnet) by magnetic force, and the other surface magnetically adsorbs to the soft magnetic board 30 provided with a soft magnetic layer 32 (described later) and functions to ensure the back yoke effect generated at that time.

[0020] Such a magnet sheet 21 is produced by forming a mixture of fine powder of a hard magnetic material (for example, a ferrite-based magnet material such as barium ferrite or strontium ferrite, or a rare earth magnet material such as samarium-cobalt magnet or neodymium-iron-boron magnet) and a small amount of an organic polymer elastomer serving as a binder (for example, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene rubber, nitrile rubber, acrylic rubber, chloroprene rubber) into a sheet shape by a forming method such as rolling or extrusion, and applying magnetization to both surfaces. Note that the magnet sheet 21 is preferably composed of an anisotropic material rather than an isotropic material. Since the anisotropic material has stronger magnetization in the direction perpendicular to the surface of the sheet and allows magnetic force to easily pass from one surface to the other side compared to the isotropic material, the magnetic attraction between the back yoke (soft magnetic layer 32) on the back surface and the magnet sheet 71 of the fixture 70 magnetically attached to the wall surface 11 can be maximally utilized. Also, the magnetization pitch of the magnet sheet 21 is preferably 1.0 mm or more and 7.0 mm or less. More preferably, it is 2.0 or more and 6.0 mm or less. Note that the magnetization pitch is selected such that a width capable of obtaining a magnetic force suitable for requirements is obtained according to the thickness of the magnet sheet 21.

[0021] The wall material film 25 is a film-shaped decorative wall material with a thickness of 70 μm to 140 μm, and is provided with an ink layer on which a pattern or design is printed on the upper surface of a base film (not shown). As the base film, a thermoplastic resin such as a polyvinyl chloride-based resin or a polyethylene-based resin having an ink-receiving layer formed on the surface, or a thin coated paper can be used. Ink is fixed to this ink-receiving layer by printing according to the application. Examples of the printing method include offset printing, letterpress printing, inkjet printing, and thermal transfer printing. The wall material film 25 having such a configuration has already been produced. The reason for setting the thickness to 140 μm or less is to keep the total thickness of the magnetic wall material sheet 10 within the upper limit of 540 μm or less where fire and heat resistance can be expected. Also, if it is thicker than necessary, the transmittance of magnetic field lines from the sheet magnet will decrease, and the magnetic adsorption ability as a magnetic wall will deteriorate. The reason for setting the thickness to 70 μm or more is to ensure appropriate tensile strength and the concealing ability of the lower layer magnet sheet 21.

[0022] The magnetic wall material sheet 20 shown above complies with ISO5660-1 and has nonflammability that satisfies the conditions in a heat generation test using a cone calorimeter tester according to the fire and heat resistance test method and performance evaluation standards based on Article 2, No. 9 of the Building Standards Act and Article 108-2 of the Building Standards Act Enforcement Order: [1] The total heat generation amount within 20 minutes after the start of heating is 8 MJ / m 2 or less, [2] the maximum heat generation rate does not exceed 200 KW / m continuously for 10 seconds or more within 20 minutes after the start of heating, and [3] there are no cracks and holes harmful to fire prevention within 20 minutes after the start of heating. 2

[0023] Furthermore, in a gas toxicity test according to the gas toxicity test method of Ministry of Construction Notification No. 1231 dated August 25, 1976, it meets the evaluation criterion that the average action stop time value of mice is 6.8 minutes or more. That is, the test specimen is heated in a heating furnace by radiant heat and direct flame from an electric heater, and the average value X and standard deviation σ of the time (action stop time) until 8 mice that inhaled the generated gas reach action stop are obtained, and the action stop time Xs of the mice is obtained by the following formula. Xs = X - σ The evaluation criteria are met when the value of Xs is greater than 6.8 minutes (the mouse's action stop time in standard wood). Here, the value obtained by subtracting the standard deviation from the average value of the action stop time is used as the pass / fail criterion, which is based on the concept to be evaluated, including the variations in materials and test results.

[0024] The soft magnetic board 30 includes a gypsum board 31 and a soft magnetic layer 32 laminated on one side of the gypsum board 31. The soft magnetic board 30 is fixedly attached to a wall base 40 made of plywood, concrete, or light metal, etc., with nails, screws, adhesives, staples, etc., with its soft magnetic layer 32 facing the front side, that is, the indoor space. Note that as the soft magnetic board 30, a board with a decorative steel plate layer laminated on one side of an inorganic board, a steel plate, or a board with a decorative sheet or a functional sheet laminated on a steel plate may also be used.

[0025] The magnetic wall material sheet 20 is fixed by magnetically adsorbing the magnet-attracting surface of its magnet sheet 21 to the surface of the soft magnetic layer 32 of the soft magnetic board 30. Thereby, the magnetic wall material sheet 20 functions as a magnetic wall capable of magnetically adsorbing a ferromagnetic body to the wall surface 11. That is, while a design is applied to the surface, articles such as display pieces or shelves with ferromagnetic bodies attached can be adsorbed and held by magnetic force.

[0026] Such a magnetic wall material sheet 20 preferably has a total thickness of 150 μ to 540 μ for the magnet sheet 21 and the wall material film 25.

[0027] As shown in FIG. 1, the hanger 70 is a magnet-attaching type shelf in an L shape in side view, including a back plate 77 and a mounting plate 78, and a magnet sheet 71 is attached to the back surface of the back plate 77 with an adhesive. The bottom of the back plate 77 is integrally orthogonal to the mounting plate 78. The hanger 70 can be hung on the wall surface 11 with an article serving as the load L placed on the mounting plate 78.

[0028] The magnet sheet 71 is made of a sheet-shaped magnet body obtained by magnetizing a mixture of, for example, a synthetic resin serving as an adhesive and magnetic powder made of a hard magnetic material, similar to the magnet sheet 21. That is, as shown in FIG. 3, on each of the front and back surfaces thereof, magnetic poles 72 and 73 (N pole and S pole) having different polarities and a constant width are alternately formed at equal intervals in a striped pattern, and it has a double-sided multi-pole magnetization type with magnetization lines 74X at a constant pitch. The magnetization pitch of the magnet sheet 71 is made the same as the magnetization pitch of the magnet sheet 21.

[0029] Here, the magnet sheet 71 has a different magnetic pole structure from the magnet sheet 21 (see FIG. 2) in the following points. That is, the magnet sheet 71 has a neutral region 75 in the vicinity of the lowermost ends of the N and S magnetic poles 72 and 73 in the substantially upper half in the magnetization pitch direction (Z-axis direction in FIG. 3). The neutral region 75 is in the form of a narrow strip parallel to the magnetization line 74X and having a minute width, and is a region that is not magnetized, or is demagnetized, or has its magnetization reduced. Specifically, it is formed in a range of 0.1 mm or more from the lowermost ends 72D and 73D of the magnetic poles 72 and 73 and within 1 / 10 or less of the vertical width of the magnetic poles 72 and 73. That is, it is formed in the range between the lowermost ends 72D and 73D of the magnetic poles 72 and 73 and a region that is 0.1 mm or more from each of the lowermost ends 72D and 73D and within 1 / 10 or less of the vertical width of the magnetic poles 72 and 73.

[0030] Such a magnetic pole structure of the magnet sheet 71 can be realized, for example, by changing the shape of the magnetization yoke in a magnetizer for multi-pole magnetization from a conventional product. FIG. 4 is a side sectional view showing a magnetizer for multi-pole magnetization. (a) shows a magnetizer 90A used when manufacturing a conventional multi-pole magnetization type magnet sheet, and (b) shows a magnetizer 90B used when manufacturing the magnet sheet 71 in the magnetic wall hanging system 1. The magnetizer 90B has a wide groove 94 for embedding the coil 92 on the surface of the magnetization yoke 91 with respect to the magnetizer 90A. Note that 95 indicates an unmagnetized magnet sheet to be magnetized.

[0031] Alternatively, instead of changing the shape of the magnetization yoke, magnets (different poles) with an elongated magnetic pole structure and high surface magnetic flux density and coercive force are brought closer to the lowermost end portions of the respective magnetic poles in the upper half of the conventional magnetic sheet, and demagnetization or degaussing is performed to obtain a substantially similar magnetic pole structure.

[0032] Next, the specific functions and effects of the magnetic wall hanging system 1 will be described with reference to FIGS. 5, 6, and 7. FIG. 5 is a side view showing an example of use of the magnetic wall hanging system of the present invention. FIG. 6 is a side view for explaining the acting force and relative positional relationship between two magnetic sheets 21 and 71. (a) shows a state where the load L (see FIG. 5) is light and the hanger 70 remains on the wall surface 11 with a sufficient margin only by the static frictional force. (b) shows a state immediately after the load L becomes heavy and the static frictional force alone is no longer sufficient to support it. The load applied to the hanger 70 (including the self-weight of the hanger 70) is assumed to be W3 in (a) and W4 (W4 > W3) in (b). FIG. 7 is an enlarged view of the broken line portion of FIG. 6.

[0033] In FIG. 6(a), the hanger 70 is adsorbed and hung on the wall surface 11 by the magnetic adsorption force P between the magnetic sheets 21 and 71. That is, the magnetic sheet 21 on the wall surface and the magnetic sheet 71 of the hanger 70 are in a state where the opposite poles (N pole and S pole) are magnetically attached to each other. In this state, the downward force W3 acting on the hanger 70 and the static frictional force Q4 are balanced, and the hanger 70 remains on the wall surface 11 without slipping.

[0034] Next, as shown in FIG. 6(b), assume a situation where the load due to the load L placed on the hanger 70 is slightly larger than the limit that can be held by the static frictional force Q4. In this situation, the hanger 70 receives a force that pulls it vertically downward due to the load W4 applied to the hanger 70 and moves vertically downward along the wall surface 11. As a result, the magnetic sheet 21 and the magnetic sheet 71 are relatively displaced by a minute interval in the vertical direction. That is, the magnetization lines 24X and 74X of the respective magnetic sheets 21 and 71 are displaced in a direction perpendicular to them.

[0035] Here, in the lower half of the magnet sheet 71, like-polarity magnetic poles (N pole 22 and N pole 72, S pole 23 and S pole 73) overlap in region B, generating magnetic repulsive forces f4 and f5 in the vertically upward and horizontal directions. By the way, below the magnet sheet 71 of the fixture 70, since it is pressed toward the wall surface 11 by the rotational moment M4, the pressing force and the magnetic adsorption force are stronger than the repulsive force, and the fixture 70 stays on the wall surface 11.

[0036] On the other hand, in the upper half of the magnet sheet 71, the neutral region 75 of the magnet sheet 71 of the fixture 70 approaches and overlaps with the N pole and S pole of the magnet sheet 21 of the magnetic wall 10. However, since they are not unlike poles, no magnetic repulsive force is generated. For example, in the thick arrow part in FIG. 7, the N pole 72 of the magnet sheet 71 of the fixture 70 does not overlap with the N pole 22 of the magnet sheet 21 on the wall surface in the Z direction, so the magnetic repulsive force can be ignored. Therefore, compared with the case where there is no neutral region 75, the magnetic adsorption force is maintained without at least the equivalent of the repulsive force being impaired.

[0037] The rotational moment M3 or M4 shown in FIG. 6 acts on the fixture 70. In this case, in the upper half of the fixture 70, it becomes a force to separate the magnet sheet 71 of the fixture from the wall surface 11, and there is a risk of impairing the load-bearing capacity of the fixture. Therefore, the magnetic wall surface hanging system 1 has a magnetic pole structure in which the same magnetic poles do not overlap and the magnetic repulsive force can be reduced.

[0038] In the magnet sheet 71 attached to the fixture 70, the range in which the magnetic poles with the neutral region 75 are formed is preferably a region that is at least U1 or more and at most U2 when measured vertically downward from the uppermost end U0 of the magnet sheet 71, as shown in FIG. 3(a). That is, it is the range between the uppermost end U0 of the magnet sheet 71 and the region V1 that is U1 or more and U2 or less vertically downward from the uppermost end U0. Here, U1 is a length that is 1 / 4 of the total length of the magnet sheet 71 in the vertical direction when measured vertically downward from the uppermost end U0 of the magnet sheet 71. Also, U2 is the length of 3 / 4 of the total length of the magnetic sheet 71 in the vertical direction measured vertically downward from the uppermost end U0 in the magnetic sheet 71.

[0039] The reason for setting the above range is that even if the neutral region 75 is formed only in the magnetic poles in the range V2 smaller than the length U1 of 1 / 4 from the uppermost end U0, the effect of being able to ignore the magnetic repulsive force (the effect of ensuring magnetic attraction force) is small, and also, if the neutral region 75 is formed up to the magnetic poles in the range V3 larger than the length U2 of 3 / 4 from the uppermost end U0, it will not be possible to expect sufficient magnetic attraction force to be ensured. Also, the width of the neutral region 75 in the vertical direction does not need to exceed 10% of the magnetic pole width, and an effect is achieved with about 0.2 mm.

[0040] As described above, the embodiments of the present invention have been described. However, the embodiments disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. The scope of the present invention is shown by the description in the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0041] Note that the broken lines (in the direction perpendicular to the magnetic sheet surface) in the figures for explaining the cross-section of the magnetic sheet of the present invention, that is, (b) of FIG. 2, (b) of FIG. 3, (a) and (b) of FIG. 6, and FIG. 7, are auxiliary lines for roughly explaining the configuration of the magnetic poles in the cross-section of the magnetic sheet, and are not the "magnetization lines" defined in this specification.

Industrial Applicability

[0042] It is effective as a system that can hang an article on a wall surface by utilizing magnetic attraction and repulsive forces.

Explanation of Reference Numerals

[0043] 1 Magnetic wall hanging system 11 Wall surface (magnetic wall surface) 21 Magnetic sheet (wall magnetic sheet) 70 Hanger 71 Magnet sheet (hooking tool magnet sheet) 72 Magnetic pole 72D Lowest end 73 Magnetic pole 73D Lowest end 74X Magnetization line 75 Neutral region U0 Highest end

Claims

1. The magnetic wall surface is formed by attaching a wall surface magnetic sheet to a wall surface forming a substantially vertical plane, and a hanging device is provided with a hanging device magnetic sheet. The wall surface magnetic sheet and the hanging device magnetic sheet are both multi-pole magnetized with the same magnetization pitch on their surfaces, so that magnetic poles of a constant width with different polarities are formed adjacent to each other alternately in equally spaced stripes on the surface. A magnetic wall hanging system in which a magnetic sheet for a fastener is magnetically attracted to a magnetic wall surface in a state in which the boundary between any one magnetic pole and its adjacent magnetic pole on the surface of the wall magnetic sheet is arranged so that the magnetization line formed by the boundary between any one magnetic pole and its adjacent magnetic pole on the surface of the fastener ... A magnetic wall hanging system characterized in that a hanging device magnet sheet has magnetic poles located in approximately the upper half of the vertical direction, which is the magnetization pitch direction of the hanging device when the hanging device is actually used and which have neutral regions in which a portion of the lower layer of the vertical width of each magnetic pole is not magnetized or is demagnetized, and magnetic poles other than the magnetic poles located in the approximately upper half do not have neutral regions.

2. 2. The magnetic wall hanging system according to claim 1, wherein the hanging device comprises a back plate having a hanging device magnetic sheet on its back surface, and a mounting plate which is orthogonal to and integral with the back plate.

3. 3. The magnetic wall hanging system according to claim 1 or 2, wherein the hanging device magnetic sheet has the neutral region at a magnetic pole whose vertical length is at least 1 / 4 and up to 3 / 4 of its total length measured from the top end.

4. The magnetic wall hanging system of claim 3, wherein the neutral area is a narrow band parallel to the magnetization line of the fastener magnetic sheet and has a very small width, and is formed in the range between the lowest end of the magnetic pole of the fastener magnetic sheet and an area 0.1 mm or more from the lowest end and less than 1 / 10 of the vertical width of the magnetic pole.

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