JP5233870B2 - Magnet screen - Google Patents

Description

  The present invention relates to a sheet-like magnet screen which is provided with a screen layer on the surface side of a magnet sheet and used by being held on a wall surface made of steel or the like.

  As this type of magnet screen, for example, the surface layer can be written with a water-based or oil-based pen, etc. and functions as a whiteboard that can be wiped off, and also functions as a projector screen for projectors, etc. Sheet-like magnetic screens that can be used easily by pasting them on the market have been put to practical use. Such a magnetic screen is usually wound up after use and wrapped with a string, or stored in a predetermined cylinder.

  By the way, since the sheet-like material was simply wound up and stored, the winding diameter was inevitably reduced, cracks and wrinkles occurred, the writing performance and the screen performance were lowered, and the screen edge was warped (curl) ) Occurs, causing a problem of drowning from the edge during use. In addition, there is a problem that the posture in the wound state is unstable and breakage or the like is likely to occur. In order to solve such a problem, conventionally, a first magnet plate is provided along one end of the magnet screen, and a second magnet plate and a winder are provided along the other end. In this case, the screen sheet is wound around the winder so that the screen sheet can be stored in a stable state with a predetermined winding diameter, and the first and second magnet plates can be prevented from being bent at the time of use. The thing is proposed (refer patent document 1).

  However, such a magnetic screen is provided with a winder, which increases manufacturing costs such as material costs and assembly costs and increases the weight, and further, although the winder is unnecessary when used. First, the cylindrical winder having such a predetermined diameter is located on the edge of the screen surface, and the image of the projector can be shaded, so that the screen surface can be effectively utilized up to the edge. It is not efficient and has disadvantages in terms of aesthetics.

JP 2002-3084 A

  Therefore, in view of the above-mentioned situation, the present invention intends to solve the problem that, when stored, the screen sheet can be rolled up in a stable state with a predetermined winding diameter, and the sag from the edge during use can be obviated. The present invention is to provide a magnet screen that can be prevented and can be reduced in cost and weight as compared with the conventional one equipped with a winder, and the screen surface can be effectively used to the end.

  In order to solve the above-mentioned problems, the present invention provides a sheet-like magnet screen in which a screen layer is provided on the surface side of a magnet sheet, and has a plate-like or rod-like shape along at least one of two opposing sides. A magnet screen is provided, which is provided with an adsorption assisting unit in which two or more magnet materials are arranged in parallel at intervals.

  Here, the adsorption assisting portion is formed by welding and sealing two or more magnet materials in parallel between resin sheets, and the adsorption assisting portion is configured to be connected by bonding along the end side. Is preferred.

  In addition, it is also preferable that the adsorption assisting portion has a plate-like or rod-like spacer member having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material and arranged in parallel between the parallel magnet materials.

  Further, a preferred embodiment is one in which the adsorption assisting portion is provided with plate-like or bar-like spacer members having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material in the longitudinal direction of the magnet material.

  According to the magnet screen according to the present invention as described above, at least two plate-like or bar-like magnet materials are arranged in parallel at intervals along at least one of the two opposite sides. Since the winding radius is regulated by the arrangement interval of the magnet material and the width of the magnet material when starting to wind from the adsorption assisting portion, it can be prevented from being too small and the attraction assisting portion serves as a core. It is possible to stabilize the wound state and prevent damage or the like.

  Moreover, compared to the conventional cylindrical winding tool having a predetermined diameter on the end side, a plurality of magnet materials interact to function as an adsorption support for the end side and as a core during winding. Since the function is also used, the cost can be reduced and the weight can be significantly reduced. Since the winder is not located at the end of the screen surface, the screen surface can be effectively used. Furthermore, there is almost no thing which protrudes on the screen surface like a winder, and rather, the accent of a border arises compared with a mere sheet | seat, and it can also be preferable also in the point of aesthetics. In addition, since the attraction assisting portion includes two or more magnet members, it is possible to more reliably prevent the end portion from jumping up.

  Further, the attraction assisting part is formed by welding and sealing two or more magnet materials in parallel between resin sheets, and is formed by connecting the attraction assisting parts by bonding along the end sides. Can be manufactured more efficiently than one that is fixed to the edges one by one, and the magnet material is not restrained forcibly, and smooth movement during winding / unfolding is realized.

  Further, since the adsorption assisting portion is formed by arranging plate-like or rod-like spacer members having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material in parallel between the parallel magnet materials, the necessary minimum A spacer member different from the magnet material functions to form a core with a predetermined winding radius while providing a suction assist function, and is placed in the suction assist section instead of the relatively expensive and heavy magnet material. By doing so, it becomes possible to save material costs and reduce weight.

  Further, since the adsorption assisting portion is formed by connecting plate-shaped or bar-shaped spacer members having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material in the longitudinal direction of the magnet material, While providing an adsorption assist function, a spacer member different from the magnet material functions to form a core with a predetermined winding radius, similar to the magnet material, and it is also possible to save material costs and reduce weight. .

The perspective view which shows the magnet screen which concerns on 1st Embodiment of this invention. (A) is sectional drawing which similarly shows the adsorption assistance part of a magnet screen, (b) is sectional drawing which shows the modification of an adsorption assistance part, (c) is sectional drawing which shows the other modification of an adsorption assistance part. Similarly, the perspective view which shows a mode that a magnet screen begins to wind up from an adsorption | suction auxiliary | assistant part. The side view which shows a mode that the magnetic screen is similarly unfolded at the time of use. (A), (b) is sectional drawing which shows another modification of an adsorption | suction auxiliary | assistant part. (A) is a perspective view which shows the magnet screen which concerns on 2nd Embodiment, (b) is sectional drawing which shows the adsorption | suction auxiliary | assistant part.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing the overall configuration of a magnet screen according to the present invention. FIGS. 1 to 5 show a first embodiment, FIG. 6 shows a second embodiment, and in FIG. The adsorption assisting unit 10 indicates a screen body, and 20 indicates a magnet material.

  As shown in FIGS. 1 and 2A, the magnet screen 1 of the present invention is a sheet-like magnet screen in which a screen layer is provided on the surface side of a magnet sheet 12, and the magnet sheet 12 and the screen layer An adsorption assisting portion 2 in which two or more plate-like or bar-like magnet materials 20 are arranged in parallel at intervals along at least one end side 10a of the two opposite sides 10a, 10a of the screen body 10 made of the Thus, at the time of winding, the winding radius is regulated by the interference between the parallel magnet members 20 of the adsorption assisting portion 2, and the attraction assisting portion 2 functions as a core during winding, When used in an unfolded state, the end sides are reliably attracted to the wall surface by the parallel magnet pieces 20 to prevent dripping and the like.

  In this example, the screen layer on the surface also functions as a white board that can be used to write and erase characters etc. with markers, and is attached to a steel wall W such as a blackboard or white board in a school classroom or corporate meeting room, and the projector screen It is a portable flexible magnet screen that can be used easily as a whiteboard. The adsorption assisting portion 2 provided on the edge 10a of the screen body 10 is simply a plurality of magnet materials 20 arranged, so that the cost can be reduced and the weight can be reduced, the screen surface does not get in the way, and the edge is clean. The part is also aesthetically pleasing, and in particular, it is preferable to add a colorful accent to the white screen surface by coloring the edge adsorption assisting part 2.

  In the following embodiment, an example will be described in which the adsorption assisting portion 2 in which two or more magnet members 20 are arranged in parallel is provided on the upper and lower end sides 10a of the screen main body 10, but the present invention is applied to the left and right side and side sides. Provided on each side edge, or one of the two opposite sides of the top and bottom or left and right, the suction auxiliary portion 2 is provided only on one side, and the other is provided with nothing, or the other is a magnet material It includes various forms such as one provided with a suction assisting part 20 provided in only one row. In the case where the adsorption assisting portion 2 in which two or more magnet members 20 are arranged in parallel only on one end side is provided, the same effect can be obtained by starting winding from the end side.

  The screen layer is configured by adhering a screen sheet 11 having the same shape and size to the surface side of a rectangular magnet sheet 12 such as a rectangle in plan view. As the screen layer (screen sheet 11) and the magnet sheet 12, conventionally known ones can be widely used. For example, a material such as a white resin for forming the screen layer is applied on the surface side of the magnet sheet 12 to form the screen layer. May be. As the magnet sheet 12, for example, a flexible sheet-like magnet in which magnet powder such as a ferrite magnet is mixed and hardened with synthetic rubber or synthetic resin can be used. The screen sheet 11 is a screen that displays an image from a liquid crystal projector, and for example, a white resin film sheet can be used.

  As shown in FIG. 2 (a), the adsorption assisting unit 2 is welded and sealed with two or more magnet materials 20 arranged in parallel between resin sheets 21 and 22 such as polyolefin resin and vinyl chloride resin. The end portion of the suction assisting portion 2 is connected to the end side 10 a of the screen body 10 by bonding with a double-sided tape 25. More specifically, three magnet members 20 are arranged in parallel at intervals on a resin sheet 22 on the lower side of the drawing, and a resin sheet 21 is covered from above to cover each magnet member 20, By welding the portions where the resin sheets 21 and 22 around the magnet material 20 overlap each other, the magnet materials 20 are separated from each other via the welded portion 24 while maintaining the interval. In this example, the ends are bonded with the double-sided tape 25, but other bonding / connecting means such as those bonded with an adhesive or the like may be used.

  For the welding between the resin sheets 21 and 22, high-frequency welding, impulse welding, hot plate welding, and other known resin welding methods can be used as appropriate, and other bonding means such as those bonded by an adhesive in addition to welding. Of course, it is also possible to adopt. Further, in this example, the resin sheet 21 is coated in a concavo-convex shape so as to cover the magnet material 20 disposed on the planar resin sheet 22, and both of them are welded as shown in FIG. It is also preferable that the resin sheets 21 and 22 are welded symmetrically. These resin sheets have the function of improving the aesthetic appearance without exposing the magnet material 20 and maintaining the holding strength and flexibility when functioning as a winding core. In this way, the magnet material 20 is divided into two resin sheets 21. , 22 is not limited to what is sandwiched between them, and may be one in which the magnet material 20 is inserted and molded integrally when the sheet material is molded, or the magnet material 20 is bonded to the surface of a sheet material such as metal or resin. In this case, if the magnet material 20 is separately coated with a resin material or the like, a good aesthetic appearance can be maintained.

  In this example, three magnet materials 20 are provided in parallel, but two or four or more magnet materials may be arranged according to the required adsorption strength. If it is sufficient, but the number of rows is necessary to sufficiently function as a winding core at the time of winding, a thick paper or the like is used between the two magnet members 20 as shown in FIG. Arranging the spacer members 23 in parallel is also a preferred embodiment in that the material cost can be reduced and the weight can be reduced. Further, based on the same concept, as described in the second embodiment of FIG. 6, a plurality of short magnets 20A are arranged in the same row, and a spacer member 23A similar to the above is arranged in the gap. This is also a preferred embodiment. These spacer members 23 (23A) are plate-shaped or bar-shaped members having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material 20 (20a) in order to function as a winding core together with the magnet material 20 (20A).

  The material of the spacer member 23 is not particularly limited, and may be made of a light metal such as aluminum, a synthetic resin, a foamed resin, a synthetic rubber, an elastomer, or the like in addition to the above-described paper, and the structure is also hollow. Various things can be adopted. As the magnet material 20, plate-like or rod-like ferrite magnets, alnico magnets, rare earth magnets, etc. can be widely used. In addition to the hard material, a soft magnet may be used as long as it is less flexible than the screen body 10. The cross-sectional shapes of the magnet member 20 and the spacer member 23 are not limited to rectangular plate shapes as in this example, and may be circular, elliptical, triangular, or other shapes. In this way, by forming a polygonal shape or semicircular shape with the upper end corners reduced, the gap between the parallel magnet members 20 can be reduced to achieve the same winding radius, and the width of the adsorption assisting portion 2 can be reduced as a whole. Can be configured more compactly.

  FIG. 3 is an explanatory view showing a state in which the winding of the magnet screen 1 of the present embodiment is started, and thus the convex portions of the magnet material 20 of the adsorption assisting portion 2 interfere with each other to maintain a predetermined diameter, It is possible to wind in a stable posture without being too small. Further, when the magnet screen 1 that has been wound up is used again, as shown in FIG. 4, the suction assisting portion 2 on one side of the screen body 10 is securely attracted to the wall surface W, and then the winding portion is placed on the wall surface. The screen body 10 is rotated along W to be attached to the wall surface W, and the attachment auxiliary portion 2 on the opposite side, which has been the winding core, is attached to the wall surface W to complete the attachment. At this time, since the adsorption auxiliary portion 2 on the one end side attached first is strongly attached to the wall surface W by the plurality of magnet members 20, the retracted portion rotates by its own weight and unfolds even if it is released. The attachment to the wall surface W can be performed very easily.

  Next, a second embodiment of the present invention will be described based on FIG.

  In this embodiment, as shown in FIGS. 6A and 6B, a magnet material having a low adsorption strength is sufficient as the adsorption assisting portion 2, but in order to sufficiently function as a winding core at the time of winding. When the number of rows is required, spacer members 23 are also arranged in parallel between rows having the magnet material 20A. Further, in the rows having the magnet material, the short magnet material 20A is twisted in the screen. The same spacer member 23A is arranged so as to be arranged at three positions, the left and right end portions and the central portion, where the above-mentioned is likely to occur, and between the two positions. The spacer members 23 and 23A are plate-shaped or bar-shaped members having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material 20A, and the materials thereof are the same as those in the first embodiment, and the material cost and the weight are reduced. It is possible. There may be a gap between the magnet material 20A and the spacer member 23A.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such an Example at all, The cross-sectional shape and dimension of a magnet material arrange | positioned in parallel differ, or a magnet material and a spacer member In addition, the above-described magnet materials 20, 20A and spacer members 23, 23A are directly bonded to the edge of the screen body 10 without using the resin sheets 21, 22. In various forms without departing from the gist of the present invention, for example, one attached to the same surface as the screen sheet 11 at the edge of the magnet sheet 12 provided extending from the screen sheet 11. Of course, it can be implemented.

DESCRIPTION OF SYMBOLS 1 Magnet screen 2 Adsorption assistance part 10 Screen main body 10a Edge 11 Screen sheet 12 Magnet sheet 20, 20A Magnet material 21, 22 Resin sheet 23 Spacer member 23A Spacer member 24 Welding part 25 Double-sided tape W Wall surface

Claims (4)

  In a sheet-like magnet screen in which a screen layer is provided on the surface side of the magnet sheet, two or more plate-like or rod-like magnet materials are spaced in parallel along at least one of the two opposite sides. A magnet screen provided with an arranged adsorption assisting part.   2. The magnet according to claim 1, wherein the attraction assisting portion is formed by welding and sealing two or more magnet materials in parallel between resin sheets, and the attraction assisting portion is connected by bonding along the end side. screen.   3. The magnet according to claim 1, wherein the adsorption assisting unit is formed by arranging plate-like or bar-like spacer members having substantially the same cross-sectional shape and cross-sectional dimensions as the magnet material in parallel between the parallel magnet materials. screen.   The said adsorption | suction auxiliary | assistant part connects in any one of the longitudinal direction of the said magnet material by connecting the plate-shaped thru | or rod-shaped spacer member of substantially the same cross-sectional shape and cross-sectional dimension as this magnet material. Magnetic screen described.

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