JP2000118190A - All weather type blackboard cover and blackboard device whose screen is replaceable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To photograph even when it rains by a method wherein a plastic sheet cover provided with a packing is attached to the inside peripheral part of the front surface of a box type frame, into which a colorless transparent plastic plate and a glass plate are fitted. SOLUTION: A box C for exchanging pictures, is formed of colorless transparent reinforced plastic sheet or reinforced glass sheet, having no flexibility and worked so as to have the shape of a box. A rain cover 2 is worked by a reinforced plastic so as to have the shape of a box and a packing 4 for preventing the touching to a letter board or the invasion of rain into the box is applied on the inside upper part as well as both ends of the cover. In this case, the rain cover 2 is attached to the front surface of the box C by a mounting fitting 3. The picture exchanging box C receives a blackboard A and a picture board B for exchanging in the gaps A", B" while a work-done and the like are written on the surface 1 of the glass. According to this method, letters on the blackboard will not be erased and a control photo can be photographed even upon rainy days.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackboard cover used in a construction site or the like for preventing characters on a blackboard from being erased by rain or touched by a body or the like and accidentally erased, and a safe transportation. The method device, and the illustrations of the screen boards prepared in advance are replaced at the time of management and inspection according to the type of work. The board is
It is about making a blackboard that can be used many times.

[0002]

2. Description of the Related Art There is no blackboard used in a construction site or the like, which has been devised in the past, but merely has a veneer board attached to a wooden frame and a matte paint. As for the method of use, a method of writing characters with chalk and taking a photograph is generally performed. On a rainy day, the chalk of the written letters melts, making it impossible to take a photo.Also, when moving around the site, hold the camera, scale, spray, etc. I work for photography, but since the slope moves along the ropes, the written characters are often erased by holding the blackboard, and the letters on the blackboard are written in the middle of the slope. Rewriting is also a very difficult technique, and it may be a precautionary point for safety management. Also, in the field management photography, a picture is drawn for each type of work, and the completed figures are entered in the picture to take a picture. Each time the type of construction changes at the same location, the illustrations are rewritten.

[0003]

Accordingly, a rainy chalk that cannot be photographed in the rainy weather and can be written on a rainy day has recently been developed, and a chalk that can be written on a blackboard even on a rainy day has been used. However, the letters on the blackboard wet with rain,
Sometimes it melts away, so wipe off the letters when rewriting the letters, but because the blackboard is wet, it will always remain whitish. Not pretty. In addition, it is important that characters are clearly and neatly captured in the management photograph. In addition, every time you take a photo, you will have a management device in your hands, so you will accidentally erase the characters on the blackboard, as well as in narrow places, high places, and slopes. One of the safety measures in photograph management photography is to make at least one hand free. Also, in management photography, each time a sketch of a construction is drawn, the figures of the work are filled in, and the work is managed and photographed as a work management photograph. That is what we are trying to solve. In view of the above, it is an object of the present invention to be able to take a picture in rainy weather in consideration of safety measures.

[0004]

According to the present invention, a frame is attached to the top and both sides of a colorless and transparent plastic plate slightly larger than a blackboard and has no bending. In addition, by installing packing to prevent rain from blowing on the inside and both ends of the plastic plate and creating a gap between the cover and the blackboard and erasing characters, it is possible to prevent rain on rainy days. But because the letters are wet and cannot be erased, I can take photos. When the rain is strong, the cover is doubled and the upper cover is lifted diagonally upward, so that the rain does not fall directly on the cover of the blackboard, so that a clearer photograph can be taken.

[0005] Further, when attaching the cover of the blackboard, a shoulder belt is attached to both side screw fittings on the upper part of the blackboard. This is when you take a photo shoot,
I bring a blackboard, but the site is a narrow place, a high place,
When traveling along a steep slope and various safety ropes when moving, it is safer to leave your hands free, so attach a shoulder belt to the blackboard, and hang this belt over your shoulder when moving. As you move, your hands are free and extremely secure.

[0006] In the case of taking a management photograph, an illustration for each type of construction and a figure of a finished model are entered at the same site, but a basic illustration of a screen is prepared in advance. At the management location, insert a board of illustrations under the glass plate for writing, fill in the finished figures, etc., and take a management photo. At this time, if the type of construction changes, erase the characters on the glass surface, insert a plate of illustrations of another type of work, enter the number of work management on the glass surface, and repeat this work, but the illustration plate is It can be used repeatedly. This eliminates the need to write a composition picture on the blackboard at the site of management at the site and prepares the image in advance, so that there is no mistake, accurate management, and quick workability.

[0007]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is an exploded perspective view of a blackboard with a blackboard cover according to the present invention, which has a screen replacement.
FIG. 2 is a bottom view of the cover according to the present invention, FIG. 3 is an enlarged side sectional view, and FIG. 4 is an exploded perspective view of attaching the cover according to the present invention to a conventional blackboard.

[0008]

In FIG. 1, C is a colorless and transparent, non-flexible, reinforced plastic plate or a reinforced glass plate processed into a box shape for a screen replacement box, and a metal fitting for attaching a cover for preventing rainy weather is provided on this box. ing. In FIG. 2, the cover is a reinforced plastic cover processed into a box shape, and a packing is applied to the upper inside and both ends of the blackboard cover so that the cover does not touch the dial and that rain does not blow. A plastic cover in the shape of a box is put on, a metal cover (5) is attached to the upper cover of the blackboard, and a shoulder belt is attached. In FIG. 4, the above contents are intended by attaching a cover to the conventional blackboard (D).

In FIG. 1, C is a tempered glass or
It is formed of a plastic box, and screen boards A and B on which illustrations and the like are written are put into these gaps. Then, the mold is written on the glass surface of the table. That is, the replacement screen boards A and B are not directly entered.

[0010]

The present invention is constituted as described above and has the following excellent effects. (1) Even on a rainy day, it is possible to take a management photograph without erasing the characters on the blackboard. (2) In site management photography, every time the type of construction changes, the illustrations and models on the blackboard are rewritten, so preparing a replacement blackboard with illustrations written in advance,
By writing only the administrative figures, you can shoot with a beautiful screen, accurate and fast. Also, since it does not fill in the screen board, it can be used many times. (3) When taking management photographs on a slope with a poor scaffolding or on a high place, it is easy to move with holding management equipment and hanging on your shoulders, so that your hands are free and ropes, handrails, etc. Being able to hold and move keeps you safe. (4) Even if the user moves on the shoulder, the characters on the blackboard are protected by the box-shaped cover, so there is no fear of being accidentally erased. (5) The cover can be used for a conventional blackboard, and has the effects (1), (3), and (4).

[0011]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a box-shaped blackboard and a replacement screen plate according to the present invention.

FIG. 2 is a bottom view of the present invention.

FIG. 3 is an enlarged side sectional view of the shoulder belt of the present invention.

FIG. 4 is an exploded perspective view of attaching a cover according to the present invention to a conventional blackboard.

[Explanation of reference numerals] Glass surface for entry Blackboard cover Mounting bracket Packing belt mounting bracket A Replacement blackboard B Replacement screen board C Screenboard replacement storage box blackboard D Conventional blackboard Replacement screen board insertion A is A A is B B 'to go into

Claims (3)

[Claims] 1. A box-shaped blackboard characterized by comprising the following steps and a cover to cover the blackboard: (a) A colorless and transparent plastic plate and a glass plate having a space having a thickness enough to accommodate one veneer plate Box-shaped frame in which is fitted. (B) A step of attaching a plastic plate cover for preventing rain and wet to the front of the plastic plate and the glass plate. (C) A step of laying a packing on the inside and both ends of the plastic plate cover to prevent rain and to erase characters. 2. A combination mounting bracket and belt according to claim 1, comprising the following steps. (A) A step of applying a hook for a belt to the mounting holes on both sides of the upper part of the box-like shape of claim 1 and fastening them with metal fittings. (B) A step of attaching a shoulder belt to this hook. 3. A board for replacing a screen of a blackboard, which comprises the following steps. (B) A process of processing the replacement screen plate with a veneer plate or a plastic plate. (B) A process of using the same matte paint as the conventional blackboard for the replacement screen plate. (C) The process of writing the basic construction illustrations on the double-sided board in advance, as well as the screens for entering the illustrations of the blackboard and the finished patterns. It is a device of the blackboard cover, the shoulder belt, and the replacement screen board configured as described above.