JP2500756Y2 - Frame members for blackboards - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackboard which is improved so as not to scatter powder when the letters, figures, etc. drawn with a writing instrument for blackboard are wiped off with an eraser on the writing surface of the blackboard. It is a thing. In the present invention, the blackboards collectively mean so-called blackboards, white boards and green boards. Therefore, when it is referred to as a writing instrument for blackboards, it is a general term for a chalk and a marker pen.

[0002]

2. Description of the Related Art FIGS. 3A and 3B show a conventional example of blackboards, wherein FIG. 3A is an overall perspective view, FIG. 3B is a sectional view near a frame, and FIG. The function as a blackboard, that is, the function of immediately marking with writing instruments, erasing with an eraser and restoring to a reusable state is mainly the board 1a.
Is responsible. In the past, the board used was a wooden board with a so-called blackboard painted on it.
The color tone is often black or green, and a dark color tone is used to make the whiteness of chalk clearer. With subsequent progress,
Iron plates have been used to attract magnetic buttons by magnetic force, and in order to reduce weight, a thin plate of iron is stuck to a wooden plate or a synthetic resin plate (for example, a styrene foam plate). Furthermore, the technique of marking with a marker pen has been developed, and boards with white or a coating close to white have been used. The board 1a has a frame 1b mounted around the board 1a with mounting screws 1d. The role of the frame 1b is to partly improve the design and enhance the commercial value, and the other part is to functionally attach a suspension ring or legs. further,
It also has a role of protecting the board 1a and securing the user. Then, the powder receiver 1c is attached below the board 1a. The original function of the powder tray is to receive the powder that falls when the board 1a is wiped with the eraser 2, but is also used as a place for erasers and writing instruments (black ink, marker pens, etc.). I have.

[0003]

[Problems to be solved by the invention] In the era when chalk was mainly used as a writing instrument for blackboards, a large amount of chalk powder was generated when the board was wiped with an eraser. Was needed. However, since marker pens are mainly used as writing tools, the labor required for cleaning up the generated powder has been significantly reduced. For this reason, there was a time when I had the illusion that "I started writing with a marker pen on a whiteboard, and I no longer bothered with disposing of powder." However, among blackboards, whiteboard-based blackboards have come to be used frequently in offices.On the other hand, furniture and interiors in offices have become more sophisticated. Became. Although white ink powder is white, although it is easily generated, it was easy to remove it by wiping or tapping it, whereas marker pen is often blue, red, or black. Because the color of the powder to be used is dark,
The actual damage is significantly greater than the amount of powder generated.
The applicant, who is a leader in the industry as a manufacturer of blackboards, and the inventor, who is a technical staff thereof, repeated tests and studies to reduce the damage of powder generated from blackboards. The most effective way to reduce the harm of powder from blackboards is to keep the eraser clean and to keep it clean at all times. " The generated foreign matter once attaches to the eraser mohair, and when it reaches a certain amount, it peels off and becomes powder, so if it is removed while adhering to the mohair, scattering of the powder is prevented. You can do it. The present inventors have invented an eraser automatic purifier from this point of view and have filed a separate application. However, subsequent research has confirmed that powder may be scattered from the eraser before the eraser is automatically cleaned by the eraser automatic cleaner. FIG. 4 is an explanatory diagram of a state in which the powder is scattered from the eraser at the moment when the wiping of the board surface is completed. The eraser 2 wipes the written surface of the board 1a while holding it by hand and reciprocating it as shown by arrows a and b. However, since the dimension d shown in the figure is generally about 5 mm, the momentum is excessive and the chained arrow c is shown. There is a risk of getting over the frame 1b. When the frame 1b is thus crossed over, the mohair 2a of the eraser 2 is rubbed against the ridge of the frame 1b to generate powder. As described above, if research is carried out to prevent the adverse effects of powder generated from blackboards, the problem of improvement regarding the frame of blackboards will be reached. The reason is (a)
Since the above-mentioned eraser automatic cleaner has to be attached to the frame of blackboards or formed integrally with the frame of blackboards, the need for a convenient frame member for mounting these devices has emerged. come. Further, as described with reference to FIG. 4, the frame itself also contributes to the generation of powder. The frame of blackboards in the past was merely an accessory for adjusting the design, but the significance of the frame member as an adapter for mounting various mechanisms for preventing powder generation on the board is significant. It came to be recognized. The present invention has been made in view of the above circumstances, and is easily and integrally integrated with a powder scattering prevention mechanism for blackboards, which has already been or is being developed, under an economically viable basis. An object of the present invention is to provide a frame member that can be molded, has general versatility with respect to boards of various shapes and sizes, and that can be mounted on the board quickly, easily and reliably.

[0004]

In order to achieve the above-mentioned object (mounting various mechanisms for preventing powder generation on a board), the structure of the present invention has a horizontal top and bottom, and a vertical left,
A frame member made of synthetic resin that is attached to the periphery of a rectangular board having both right sides, and has a section with a U-shaped cross-section that fits gently with the board, and has a U-shaped parallel shape. The retaining teeth are provided on the inner surface of the portion that is in contact with the two sides, and the retaining teeth are wrinkled toward the back of the U-shaped recess rather than the posture perpendicular to the two parallel sides. It is characterized by doing.

[0005]

According to the above construction, since the main body is a portion having a U-shaped cross section, it can be industrially manufactured at low cost by using the extrusion molding method when it is made of synthetic resin. Moreover, the pleated retaining teeth provided inside the U-shaped portion can be easily integrally formed and can be fitted to the board without requiring a high precision in the thickness dimension. Moreover,
This frame member has a wide variety of practical applications, such as being configured in a shape that does not scatter the powder from the eraser, and integrally forming a powder receiver that prevents the powder from rising. The retaining teeth are pressed against the board by the elastic restoring force, and serve as a retaining function by the frictional force.

[0006]

FIG. 1 is a vertical sectional view of a board on which an embodiment of a frame member for blackboards according to the present invention is mounted, and the frame members of different embodiments are mounted on the top side and the bottom side of the board, respectively. At the same time, the center of the board is broken and the vertical dimension is cut down. FIG. 2 is a view for explaining a detailed configuration, an operation, an effect, and a method of use of the frame member of the embodiment mounted on the bottom side of the board among the above-described embodiments, and the constituent portion shown in FIG. It is an exploded sectional view which expanded and drawn the lower half part. (See Fig. 1) Board 3
A bottom frame member 4 is attached to the bottom of the. A top frame member 8 is attached to the top of the board 3. Although not shown, vertical frame members similar to the top frame member 8 are mounted on both left and right sides of the board 3. This Figure 1
In FIG. 3, the engaging portion 6 in which the vertical frame member is combined with the bottom frame member 4 and the top frame member 8 is shown, and is connected by the stopper 7. In the bottom frame member 4, a U-shaped cross-section portion 4b constitutes a main body portion, and a large number of pleated retaining teeth 4c are integrally extruded from a synthetic resin material inside thereof. The retainer teeth 4c in FIG. 1 are shown in a state where the retainer teeth 4c are pressed into the board 3 to be bent, and are strongly pressed against the board 3 to perform a retainer function. The free shape of the retaining tooth 4c is shown in FIG. 2, which is an exploded view. As shown in FIG. 2, each of the retaining teeth is parallel to the U-shaped portion 4b.
It is not a right angle to the side, but is inclined to the back of the groove. With such a shape, the board 3 can be easily press-fitted, and further, after the board 3 is press-fitted, the retaining teeth are pressed against the board 3 by the elastic restoring force and a frictional force is exerted, so that there is no risk of slipping out.

In the bottom frame member 4, the powder receiving seat 4a is integrally formed with the U-shaped portion 4b described above, and the powder receiving main body 5 is detachable from the powder receiving seat 4a. It is fitted. The powder receiving main body 5 can be freely detached and cleaned as shown by a reciprocating arrow d-e shown in FIG. 2, or can be easily fitted and restored.

The top frame member 8 shown in FIG. 1 is similar to the bottom frame member 4 in terms of the structure of its mounting portion to the board 3. The top frame member 8 is formed with a standing wall surface 8a having a rising dimension H. This standing wall 8a
Is provided so that the eraser does not overpower, and it is desirable that the dimension H is 15 mm or more in order to prevent the eraser from overcoming. This is because if the size is less than 15 mm, the function of preventing the eraser from getting over is insufficient. Since the upper limit of the dimension H is not particularly limited in terms of the eraser crossover prevention function, it can be arbitrarily set in consideration of design considerations, usability, and manufacturing cost. Reference numeral 8b integrally formed with the top frame member 8 shown in FIG. 1 is a lifting tool. According to the configuration of this embodiment, the total weight including the board 3, the frame member and the attached parts thereof is determined by the lifting tool 8 of the top frame member.
It can be safely suspended (with sufficient margin) by b.

[0009]

EFFECTS OF THE INVENTION When the present invention is applied, since the main body is a U-shaped section, it can be manufactured industrially at low cost by using the extrusion molding method when it is made of synthetic resin. Moreover, the pleated retaining teeth provided inside the U-shaped portion can be easily integrally formed and can be fitted to the board without requiring high precision in the thickness dimension. In addition, the frame member has a wide variety of practical application ranges, such as a shape that does not scatter the powder from the eraser, and an integrally molded powder receiver that prevents the powder from rising. The retaining teeth are pressed against the board by the elastic restoring force, and exert an excellent practical effect of fulfilling the retaining function by the frictional force.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a board on which an embodiment of a frame member for blackboards according to the present invention is mounted, in which frame members of different embodiments are mounted on the top side and the bottom side of the board, respectively. The center of the board is broken and the vertical dimension is cut down.

FIG. 2 is a view for explaining a detailed configuration, an operation, an effect, and a method of use of a frame member of the embodiment mounted on the bottom side of the board among the above-described embodiments, and the configuration shown in FIG. It is an exploded sectional view which expanded and drawn the lower half part of a part.

3A and 3B show a conventional example of blackboards, where FIG. 3A is an overall perspective view, FIG. 3B is a cross-sectional view near a frame, and FIG. 3C is a cross-sectional view near a powder receiver.

FIG. 4 is an explanatory view of a state in which powder is scattered from the eraser at the moment when the wiping of the board surface is completed.

[Explanation of symbols]

1 ... Blackboards, 1a ... Board, 1b ... Frame, 1c ... Powder receiver, 2
... eraser, 2a ... mohair, 2b ... eraser cover, 3 ... board, 4 ... bottom frame member, 4a ... powder receiving seat, 4b
... U-shaped part, 4c ... retaining teeth, 5 ... powder receiving body, 8 ...
Top frame member.

Claims (5)

(57) [Scope of utility model registration request] 1. A frame member made of synthetic resin, which is attached to the periphery of a rectangular board having horizontal top and bottom sides, and vertical left and right sides, and which is loosely fitted to the board. In addition to having a U-shaped portion, a retaining tooth is provided on the inner surface of the portion corresponding to the two parallel sides of the U-shape, and the retaining tooth is formed in a posture perpendicular to the two parallel sides. Also, a frame member for blackboards or the like, which has a fold shape that is inclined toward the back of the U-shaped recess. 2. The gutter-shaped powder receiving means is integrally fixed to the U-shaped section in the portion of the frame member attached to the bottom side of the board. The frame member for blackboards according to claim 1. 3. The powder receiving means is composed of a powder receiving seat integrally formed with a U-shaped portion, and a powder receiving main body detachably attached to the powder receiving seat. The frame member for blackboards according to claim 2, characterized in that. 4. A standing wall surface that is substantially vertical to the board surface is provided in a portion of the frame member that is mounted on the top side and a portion that is mounted on both the left and right sides of the frame member. And the rising dimension of the standing wall is at least 15 mm.
A frame member for blackboards described in. 5. The suspending tool is integrally formed by arranging a portion of the frame member attached to the top side on the side opposite to the standing wall, and integrally forming the suspending tool. Frame members for the blackboards listed.