JP2587586Y2 - Black board - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackboard that is easy to install, dispose, and maintain.

[0002]

2. Description of the Related Art A blackboard has a structure in which a blackboard surface for writing characters and the like and a base plate which is a backing of the blackboard surface are reinforced with a back rail or the like. In the case of a wooden chalkboard, the blackboard surface is formed directly on the surface of the main plate, and in the case of a steel blackboard and enameled blackboard, a steel blackboard or enameled blackboard with a blackboard surface formed on the surface is used as the main plate. Attached to the surface.

[0003]

[Problem to be solved by the invention] Since the blackboard has a problem in use if its surface is not one-sided, it is necessary to make it as a so-called single piece and carry it to the installation site in the assembled state and install it. There is.

[0004] For this reason, when a blackboard is attached and installed in a place where it is difficult to carry in, it is necessary to use a crane, a long elevator, or the like, and thus there has been a problem that it takes time and cost. Also, in a building, a high-rise building, or a school, a study school, a preparatory school, or the like where the stairs are narrow and difficult to carry in, it is extremely difficult to carry in and install and relocate the long blackboard.

If the surface of the blackboard is worn and aged after long-term use, it is necessary to perform maintenance on the blackboard.

[0006] Conventional methods of maintenance of the blackboard include a method of replacing the blackboard itself, a method of repainting the blackboard surface, and applying a new blackboard surface material to the existing blackboard surface with an adhesive, concrete bond, and both sides. An over-pasting method of bonding using a tape or the like is known.

[0007] However, the method of replacing the blackboard itself requires a large amount of work, and it is not possible to separate the wood part of the removed old blackboard from the blackboard surface material part including the steel plate. There was a problem that it was difficult.

The upper pasting method is easier to carry out than the method of replacing the blackboard itself. However, when a new blackboard surface material is adhered on the blackboard surface of an existing blackboard to renew the blackboard surface, In addition, the thickness of the surface material of the blackboard is added and the weight is also added for each top application. For example, the thickness increases by about 6 mm for each top application, and the weight increases about 26 kg for a 1200 mm × 3600 mm blackboard. As described above, there is a problem that the following inconvenience is caused when the thickness or the weight increases each time the maintenance is performed.

For example, in the case of upper and lower blackboards or drawer blackboards in which two blackboards can be moved by pulling, since the groove width of the guide rail is fixed, if the thickness increases, the blackboard cannot be moved. However, it was very difficult to apply the material on the surface of the blackboard.

In a slider blackboard movable vertically, a counterbalance corresponding to the weight of the blackboard is provided so as to balance the weight. Then, since the balance of the weight was lost, it was extremely difficult to apply the top.

[0011] Further, even with a blackboard that can be moved in the left-right direction, there is a problem that if the weight of the blackboard increases, a large force is required to move the blackboard, making it difficult to use.

Further, even in the case of a blackboard which does not move, the thickness and the weight are added, so that there is a limit in terms of strength. Also,
Immediately after the top application, even if a sufficient adhesive strength was obtained, the adhesive strength was reduced due to aging, and the surface material of the top applied blackboard was peeled off, sometimes causing a state in which it could not actually be used.

Accordingly, an object of the present invention is to provide a blackboard in which operations such as installation, disposal, and maintenance are easy.

[0014]

According to the present invention, in order to achieve the above object, a flexible sheet-like permanent magnet is attached to the surface of a base plate, and the sheet-like permanent magnet is
A surface member made of only a steel plate having a blackboard surface formed on its surface is detachably attached by a magnetic force acting between the steel plate and the sheet-shaped permanent magnet.

[0015]

According to the present invention, a surface member made of only a steel plate having a blackboard surface formed on a surface thereof has a magnetic force generated by a flexible sheet-like permanent magnet such as a rubber magnet attached to the surface of a base plate. Attached by Therefore, even if the blackboard surface is a curved blackboard, the steel plate can be securely attached. In addition, the integrated blackboard can be installed after the divided carry-in, and the replacement work of the blackboard can be easily performed. In addition, the old surface member is replaced with a new one during maintenance work, so that the thickness and weight of the blackboard do not increase. And
Since the surface member made of only the steel plate having the blackboard surface formed on the surface is separated, the surface member can be wound in a cylindrical shape even if the blackboard is enlarged, and the transportation thereof becomes extremely easy. Further, it is easy to dispose of the old surface member.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present invention will be specifically described below based on embodiments with reference to the drawings.

FIGS. 1 (a) and 1 (b) are a partially cutaway front view and a sectional view showing a blackboard main body 1 of a first embodiment of the blackboard of the present invention. For example, thickness 24mm x height 1200mm
A ground plate 3 made of plywood is attached to one side of a reinforcing member 2 composed of a horizontally long rectangular back rail frame 2a having a width of 3600 mm and a plurality of back rails 2b provided inside the back rail frame 2a by a bond for woodworking, a nail or a tucker. Installed. The base plate 3 is not limited to plywood, and may be made of a synthetic resin foam plate.

FIG. 2 is a partially enlarged sectional view showing the surface portion of the blackboard main body 1 in an enlarged manner. A thin magnet sheet 4 having a thickness of, for example, about 0.5 to 1 mm is attached to the entire surface of the base plate 3 by nailing, screwing, or an adhesive. Note that a plurality of magnet sheets 4 may be partially attached to the surface of the base plate 3 instead of the entire surface of the base plate 3. As this magnet sheet, a flexible sheet-like permanent magnet called a rubber magnet is used. On the surface of the magnet sheet 4, a sheet-shaped adhered magnetic body, for example, having a thickness of 0.27
A steel sheet 5 of about 0.5 mm is attached by a magnetic force acting between the magnet sheet 4 and the steel sheet 5. After the surface of the steel sheet 5 is subjected to a primer coating and baked,
A blackboard surface 6 is formed by applying and baking a steel baking blackboard paint containing a resin such as epoxy or urethane as a main component and blending various pigments, a matting agent, a curing agent, and the like. The steel plate 5 and the blackboard surface 6 are integrated to form a replaceable surface member 7. Note that an enameled steel plate or an aluminum-plated steel plate may be used instead of the steel plate 5. The total thickness of the base plate 3, the magnet sheet 4, and the surface member 7 is, for example, 6 mm, and thus the entire thickness of the blackboard main body 1 is 30 mm.

FIG. 3 is a sectional view showing an example of a structure for attaching the blackboard body 1 shown in FIG. 1 to a wall surface of a facility. A plurality of L-shaped mounting brackets 22 are mounted on the wall surface 21 with screws 23, and a wooden rectangular frame 24 is mounted on these mounting brackets 22 with screws 25, for example. . Note that a concrete nail may be used instead of the screw 23. The inner circumference of the frame 24 is slightly larger than the outer circumference of the blackboard main body 1, and the blackboard main body 1 is fitted into the frame 24. A positioning member 26 is provided on the inner peripheral portion of the frame 24 on the back side of the blackboard main body 1,
A ledge 27 is provided on the front side. This ridge 27
Is attached to the frame 24 by nails using a nailing machine using a compressor, for example. Also, the frame 24
The lower side member 24a is extended forward to form a powder receiving groove 28. Also, a chalk box 29 is attached to the lower side member 24a.
Is attached.

Next, a procedure for performing the above-described blackboard maintenance will be described.

First, in the state shown in FIG. 3, the pressing edge 27 is removed, and then the surface member 7 having the deteriorated blackboard surface 6 is peeled off from the surface of the magnet sheet 4. At this time, since the steel sheet 5 of the surface member 7 and the magnet sheet 4 are only adhered by magnetic force, the steel sheet 5 can be easily peeled off from the magnet sheet 4 by turning the steel sheet 5 from the end. Next, a new surface member 7 prepared in advance is used.
Is attached to the magnet sheet 4 using the magnetic force with the steel plate 5 facing downward. Finally, the ridge 27 is attached again, and the replacement of the surface member 7 is completed.

According to the embodiment shown in FIG. 1, the thickness and weight of the blackboard itself do not change at all even when the maintenance work for renewing the surface member 7 is performed. The maintenance work can be performed many times without any trouble even on a mobile blackboard where the weight itself is a problem.

Further, if the reinforcing member 2, the base plate 3 and the magnet sheet 4 are integrally formed to form the base panel 8, connecting a plurality of base panels 8 facilitates installation of a long blackboard. Become. Further, by dividing each base panel, it can be carried into any place. Further, since the surface member 7 can be wound into a cylindrical shape, the height 1
Even a surface member 7 of 200 mm x 3600 mm width has a diameter of 4
It becomes about 00 to 500 mm, and transport becomes extremely easy.

In the above-described embodiment, a blackboard having a new structure for replacing the surface member 7 is used. However, the present invention can be applied using an existing blackboard. 4 (a) and 4 (b) are a partially cutaway front view and a sectional view showing a second embodiment of the present invention using an existing blackboard.

The existing blackboard main body 11 is constructed by attaching a base plate 14 having a blackboard surface 13 formed on the surface thereof to a reinforcing member 2 composed of a back rail 12a and a back rail 12b similar to the first embodiment. I have. And the blackboard surface 1 of the existing blackboard body 11
3 is deteriorated, the blackboard surface 13 of the existing blackboard body 11 is used.
A ground plate 3 ', which is formed by bonding a magnet sheet 4 to the surface of the ground plate 3 with an adhesive or the like, is attached to the surface of the base plate 3 with nails, screws or an adhesive. Or,
The magnet sheet 4 may be directly attached to the surface of the blackboard 13. A blackboard surface 6 is formed on the surface of the steel plate 5 as in the first embodiment. The steel plate 5 and the blackboard surface 6 are integrated to form a replaceable surface member 7.

As described above, when the existing blackboard surface 13 of the existing blackboard body 11 is deteriorated, the surface of the blackboard is renewed by pasting the base plate 14 and the surface member 7 on the existing blackboard surface 13. .

After the maintenance work, if the blackboard surface 6 of the top surface member 7 is deteriorated by using the blackboard for a longer period of time, the old surface member 7 is peeled off from the magnet sheet 4 and a new surface member is removed. 7 is attached to the magnet sheet 4. After the main plate 3 and the magnet sheet 4 are once attached to the existing blackboard main body 11 in this way, the blackboard surface 6
The quality suitable for use of the blackboard surface 6 can be always maintained simply by replacing the surface member 7 each time the image quality deteriorates. The operation of attaching and detaching the surface member 7 is extremely easy because the magnetic force between the magnet sheet 4 and the steel plate 5 is used.

[0028]

As described above, in the present invention, the surface member consisting only of the steel plate having the blackboard surface formed on the ground plate is used by utilizing the magnetic force of the flexible sheet-like permanent magnet. For example, even if the surface of the blackboard is curved, the maintenance work of installing the blackboard and replacing the blackboard can be performed reliably and easily. Further, only the surface member is replaced during the maintenance work, so that the thickness and weight of the blackboard do not increase even by the maintenance work. As a result, the maintenance work can be performed any number of times without any problem even on a blackboard whose size and weight are limited. Further, since the surface member made of only the steel plate having the blackboard surface formed on the surface is separated, the surface member can be wound into a cylindrical shape even if the blackboard is enlarged, and the transportation becomes extremely easy. Further, it is easy to dispose of the old surface member.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a partially cutaway front view and a sectional view showing a blackboard main body of a first embodiment of the blackboard of the present invention.

FIG. 2 is a partially enlarged sectional view showing a surface portion of a blackboard main body in an enlarged manner.

FIG. 3 is a cross-sectional view showing an example of a structure for attaching the blackboard body shown in FIG. 1 to a wall surface of a facility.

4 (a) and 4 (b) are a partially cutaway front view and a sectional view showing a second embodiment of the present invention using an existing blackboard.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blackboard main body, 2 ... Reinforcement member, 2a ... Back rail frame, 2b ... Back rail, 3, 3 '... Ground plate, 4 ... Magnet sheet, 5 ... Steel plate, 6 ... Blackboard surface, 7 ... Surface member, 8 ... Substrate Panel, 11
... Main body of existing blackboard, 12 ... Reinforcement member, 12a ... Back frame, 1
2b ... back rail, 13 ... existing blackboard surface, 14 ... 3 ... base plate, 21
... wall surface, 22 ... mounting bracket, 23 ... screw, 24 ... frame, 2
4a: lower side member, 25: screw, 26: positioning member, 2
7 ... ridge, 28 ... powder receiving groove, 29 ... chalk box

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B43L 1/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A sheet-shaped permanent magnet having flexibility is attached to the surface of a base plate, and a table made of only a steel plate having a blackboard surface formed on the surface of the sheet-shaped permanent magnet.
A blackboard, wherein a surface member is detachably attached by a magnet acting between the steel plate and the sheet-like permanent magnet.