JPH045560B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic blackboard eraser.

(Prior art) Blackboards are commonly used in classes and lectures not only in elementary schools, junior high schools, high schools, and universities, but also in general society, and each teacher or lecturer uses a chalk board to write their own ideas on the blackboard. Describe the content of lectures and lectures. Once the entire surface has been written, the characters are erased using a blackboard eraser, another content is written, and the lecture continues. Not only does the chiyoke powder stain clothes, but it also enters the lungs, causing health problems. In addition, since most of these dust particles adhere to the blackboard eraser, it is sometimes necessary to remove the dust particles by hitting the blackboard eraser with a stick. Depending on the direction of the wind, it can swing at you. Of course, there is a device that automatically removes chalk powder adhering to a blackboard eraser, but it is cumbersome to use and the device itself is bulky, making it difficult to find a place to install it. Furthermore, the blackboard eraser is only the size of the palm of your hand, and it takes time to erase the content written on the entire surface of a large blackboard, which may cause a temporary interruption of the lecture, or may be inconvenient depending on the content of the lecture. This is natural and results in hindering students' understanding of the content.

By the way, in recent years, when giving lectures, instead of using such a blackboard, OHP (over head
projector) is used in some cases.
This device projects what is written at hand onto a screen, and there is no need to use a chiyoke. In other words, it is written with a magic pen, etc., but such devices often copy a film prepared in advance rather than write directly on the spot, and are used only when there is a limited time such as at an academic lecture. This is suitable when you need to explain the situation. Therefore, when conducting general classes using OHP operations like this, simply having the explanation content appear on the screen is more effective in attracting students to the teacher's side than when writing directly on the blackboard using a chalk board. It is not a desirable device from an educational perspective.

(Objective of the Invention) The above-mentioned problems exist when erasing a blackboard written in chalk using a blackboard eraser, or when teaching using an OHP device. Therefore, the present invention is a technology developed with the aim of solving these problems.It uses a blackboard, keeping in mind that the educational effect is not impaired, and quickly and automatically reads the characters written on the blackboard. It provides a device that can be erased.

(Configuration of the Present Invention) Therefore, in order to solve the above problems, the automatic blackboard erasing device according to the present invention is configured with the following features. That is, the basic form of the automatic blackboard eraser is that a cylindrical mat is rotated while sliding in contact with the blackboard surface, and the device includes a driving source for rotating the mat. A motor is mounted and the rotating mat is connected to the motor. The connection means may be arranged in parallel to each other via a belt, or may be arranged in series and the main shaft of the motor is directly connected via a reduction gear, and is not particularly limited. Further, in order to slide on the surface of the blackboard, the mat is attached to a frame body, and the frame body is provided with a support roller and a guide roller, and is supported at the upper and lower sides of the blackboard. Therefore, a rail is attached to at least the upper side of the blackboard for engaging the support roller and guide roller, and a motor is connected to the support roller to automatically move the frame along the blackboard. It is made to be able to slide. Furthermore, the mat erases the letters written on the surface of the blackboard by sliding while rotating, and is equipped with a dust collector to collect the dust in one place.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the automatic blackboard eraser according to the present invention will be described in detail based on the drawings.

(Example) Figures 1 and 2 show specific examples of the automatic blackboard eraser according to the present invention, in which 1 is a rotating mat, 2 is a motor, 3 is a dust collector, 4 is a support roller, and 5 is a guide roller. It shows. Here, the rotating mat 1 has a cylindrical shape, has a predetermined outer diameter, has a length corresponding to the height of the blackboard A, and is rotated by the motor 2. The motor 2 is connected to a pulley 7 formed at the upper end of the rotating mat 1 via a belt 6.
A soft cloth or the like is attached to the outer periphery of the rotating mat 1 so that the characters written on the surface 8 of the blackboard A can be erased by rotation. Of course, sponge, feathers, etc. may be used instead of the cloth, but it must be able to erase the characters and must not cause scratches on the surface 8 of the blackboard A when it is rotated. The rotary mat 1 is covered with a cover 9 to prevent dust from scattering, and the dust removed from the surface 8 of the blackboard A is collected by a dust collector 3 installed next to the rotary mat 1.
are collected in. The dust collector 3 has a filter at the inlet to remove large particles, and a fan is installed inside.The shape of the dust collector 3 is arbitrary. They are collected in box 10 where they are worn.

Incidentally, the rotating mat 1, the motor 2, and the dust collector 3 are mounted on a frame 11 serving as a base, and the frame 11 is supported by support rollers 4, 4 provided at the upper end of the frame 11. There is. Two support rollers 4 are supported at regular intervals, one of which is connected to a sliding motor 12 via a belt 13, and can slide left and right using the sliding motor 12 as a drive source. I can do it. Therefore, in order to support the apparatus by the support rollers 4, 4, a rail 14 is provided along the upper side of the blackboard A, and the support rollers 4, 4 roll on the rail 14. In addition, guide rollers 5, 5, . . ., which roll in contact with the front and back sides of the rail 14, are pivotally supported so that the support rollers 4, 4 do not separate from the rail 14.

FIG. 3 is a detailed view of the device showing the support rollers 4 and guide rollers 5 seen from above. These rollers 4 and 5 restrain the rail 14 from above and from the front and back, and the rotating mat 1 It is considered to always move in parallel. On the other hand, supporting rollers are used not only at the upper end but also at the lower end to support the device.
5 is pivotally supported to facilitate smooth sliding of the device. Furthermore, the rotating shafts of these guide rollers 5 and support rollers 15 are attached so that they can be finely adjusted. If it is no longer possible to erase the gap, the roller shaft must be adjusted to eliminate the gap.

Further, in FIG. 1, reference numerals 16 and 17 are limit switches, and these limit switches 16 and 17 are attached to the left and right sides of the frame 11, and the sliding movement of the device along the blackboard A is controlled by the limit switches 16 and 17. It is stopped at the end.

Incidentally, in this device, the rotation of the rotary mat 1 and the sliding motor 12 operate independently, and a cover 9 is provided on the upper surface of the cover 9 so that the rotary mat 1 can be manually moved while being rotated. is handle 18
is attached.

As described above, although the automatic blackboard eraser according to the present invention is not limited to the above embodiments,
A rotating mat 1 is rotatably attached while in contact with the surface 8 of the blackboard A, and a dust collector 3 is provided near the rotating mat 1 to collect the dust removed by the mat. The support roller 4 and the guide roller 5 are attached to a frame body to which these are attached so that it can move along the upper side of the blackboard A, and the following effects can be obtained.

(Effects) (1) By attaching this device to a blackboard, it is possible to quickly erase the Chiyok characters written on the entire blackboard, and prevent clothing from becoming dirty with Chiyok powder.
It is possible to prevent a situation in which health is harmed by inhaling the chiyolk powder.

(2) Furthermore, since the characters can be quickly erased and the next assignment can be moved on without wasting time, it is possible to conduct lectures with a smooth flow without interrupting the class.

(3) If the surface of the rotating mat 1 is worn and a gap occurs between it and the blackboard A, the guide roller 5 that is in contact with the front and back sides of the upper part of the frame 11 and the lower part of the frame 11 By adjusting the positional relationship between the rotating shafts of the guide rollers 15 that are in contact with the surface side of the frame body 11, and moving the rotating mat 1 by a predetermined length toward the blackboard A to eliminate the above-mentioned gap, the rotation The mat 1 can be kept in an erasable state for a long period of time.

At this time, the position of the guide roller 5 on the back side of the upper part of the frame 11 is also adjusted, and the upper part of the frame 11 is reliably held between this guide roller and the guide roller 5 on the front side, so that the rotating mat 1 after adjustment is adjusted.
(Frame 11) will not shift.

[Brief explanation of drawings]

1 and 2 show an embodiment of the automatic blackboard eraser according to the present invention, in which FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a view taken from arrow B in FIG. Enlarged views of each figure are shown. A... Blackboard, 1... Rotating mat, 2... Motor, 3... Dust collector, 4, 15... Support roller, 5
...Guide roller, 6,13...Belt, 7...
Pulley, 8...Surface, 9...Cover, 10...
Box, 11... Frame, 12... Sliding motor,
14...Rail, 16,17...Limit switch, 18...Handle.

Claims (1)

[Scope of Claims] 1. A support roller for running is mounted on the upper part of a frame 11 that includes a rotating mat 1 for erasing the blackboard A, a driving motor 2 for the rotating mat 1, and a dust collector 3. 4, and first and second guide rollers 5, 5 that are in contact with the front side and back side of the blackboard A, respectively, and a third guide roller that is in contact with the front side of the blackboard A is attached to the lower part of the frame 11. 15, and the supporting roller 4 moves on a rail 14 provided at the upper end of the blackboard A, the blackboard erasing device comprising: the first and second guide rollers 5, 5 and the third guide roller 5; The guide rollers 15 are attached to the frame 11 in such a manner that the positional relationship between each rotating shaft and the frame 11 can be adjusted, and the gap between the blackboard A and the rotating mat 1 can be adjusted. A blackboard erasing device characterized in that the blackboard eraser is eliminated by adjusting the positional relationship.