JPS6071299A - Receiver for chalk powder of blackboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device that facilitates cleaning of chalk powder and prevents chalk powder that has fallen into a receiving gutter from adhering to a blackboard wiper again.

[Technical background of the present invention]

The problem when using a blackboard is that when you wipe the blackboard with a blackboard wipe, chalk powder falls into the gutter, and you have to place the chalk or chalk on top of the chalk powder. Chalk powder may re-adhere to the felt surface when placed in the gutter, and the next time the blackboard is wiped, the blackboard surface becomes dirty and the powder scatters.
For example, chalk powder that has fallen may adhere to the chalk and stain the hands when writing on the blackboard. This may stain your clothes or
Inhalation of chalk powder causes respiratory problems and is said to be a major cause of lung disease, especially among teachers. Furthermore, chalk powder falls directly onto the conventional gutter and accumulates, so if you use a wet rag to clean it, the gutter will get wet. There was also the problem that the powder was stuck and cleaning was difficult. [Objective of the Invention] The present invention solves these conventional problems, makes cleaning of chalk powder easier, and makes it possible to use chalk powder for cleaning chalk and blackboards. The object of the present invention is to provide a device having a structure in which there is less adhesion of particles.

[Structure of the invention]

The device of the present invention includes a chalk powder receiving gutter which is attached to the lower part of the blackboard so as to protrude in front of the blackboard, and 1. It consists of a chalkboard wiping shelf that is removably installed at a predetermined space above the receiving gutter and has a skeleton structure that allows chalk powder to pass through.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a side sectional view showing an embodiment of the present invention, and FIG. 2 is a plan view thereof, in which (1) is a blackboard and (2) is a chalk powder receiving trough. This gutter (2) can be manufactured by molding aluminum material by hot extrusion or cold drawing, and is cut into lengths of 11 and attached to the bottom of the blackboard. The cross section is an inverted trapezoidal shape with the upper part open, and the blackboard (11 side and the front side are provided with a taper part (2a) and a taper part (2b), respectively. Part (2b) is a blackboard (a part of the taper of 11 cases (
It is lower than 2a) and is connected to the front jetty (2c).

Blackboard (11 side taper part (2a) terminal end (2d),
A blackboard wiping shelf (3) is removably placed between the front taper part (2b) and the connecting step (2e) with the jetty (2c), as shown in Figure 1. It is configured so that it can be placed tilted so that the front side is low and the blackboard side is high.

This blackboard wiping shelf (3) may be in the form of a lattice as shown in FIG. 2 or in the form of a net as shown in FIG. 4, and the gap therebetween may be sufficient as long as the chalk does not fall into it. Figure 3 shows a cross section of a grid-shaped blackboard wiper shelf (3). Each shelf post (3a) has a triangular cross section, and by rubbing the blackboard wiper from side to side while moving it, you can wipe the blackboard. You can remove chalk powder stuck to the wipe. In Figure 2 (
4) is a side cap attached to the end of the receiver (2). Note that an opening is provided at the end of the receiving trough (2), and a chalk powder receiver and a chalk container box are attached to the opening.

FIG. 5 is a perspective view showing an embodiment of the leaner (5) suitable for cleaning chalk powder accumulated on the receiving gutter (2) of the present invention, and is adapted to the cross-sectional shape of the receiving gutter (2). By making it into a shape, chalk powder can be cleaned in one go when it is used to sweep over the receiving gutter (2).

A method of using the apparatus having the above configuration will be described below.

Normally, the above-mentioned blackboard wiping shelf (3) is placed above the receiving gutter (2).
Place the blackboard wiper on this shelf (3). When the letters on the blackboard (1) are erased with a blackboard wipe, the chalk powder falls along the blackboard (1), passes through the gap in the shelf (3), and accumulates on the upper surface of the gutter (2). Therefore, almost no chalk powder accumulates on the shelf (3), and even if a chalkboard wipe is placed on it, it will not get dirty again. Also, the blackboard wiper is on the shelf (3
) and move it from side to side several times to remove chalk powder from a blackboard wiper, and there is no need to use an electric chalk cleaner, which is usually placed in the corner of the classroom, as in the past.

Also, if chalk is placed on the shelf (3), since the shelf (3) is installed at an angle, it will roll forward and the chalk will fall off when you wipe the blackboard (11). It is difficult for powder to stick to the product, and there is no need to do unsanitary things like blowing on chalk to scatter powder.

Even if the shelf (3) is installed horizontally, it still functions as described above, but by installing it at an angle, the chalk placed on the shelf (3) will roll forward and fall when you wipe the blackboard. The flow of chalk powder can be avoided. Additionally, if you place the chalk on the blackboard wiper shelf parallel to the blackboard, it will always roll toward you, saving you the trouble of looking for the chalk.

To clean the chalk powder that has accumulated on the receiving gutter (2), use the shelf (
3) and sweep the top of the gutter (2) using the cleaner (5) described above, the powder can be easily wiped off, and the shelf (3) itself can also be washed with water. Even if chalk powder adheres to the receiver 1m (21), the upper surface of the receiver trough (2) is wide open, so the powder can be easily removed by wiping with a damp cloth.

This shelf (3) is connected to the existing gutter (2) as shown in Figure 6.
It is also possible to provide a hook part (3b) to attach it on top of the blackboard (1) and to span it between the front crosspiece and the blackboard (1), or to place it in the gutter at an angle or horizontally. It is also possible to have a structure with legs for this purpose.

〔Effect of the invention〕

As described above, the present invention has the following effects.

■The blackboard wiping shelf is installed above the gutter, so
Chalk powder that falls when wiping a blackboard passes through the chalkboard wiping shelf and accumulates in the gutter, and even if you place a blackboard wiper and chalk on top of this, the chalk powder that falls may stain the blackboard wiper and chalk again. do not have.

■Since the chalkboard wiping shelf has a frame structure, chalk dust can be removed by moving the chalkboard wiping machine over it, eliminating the need for a conventional electric cleaner, and moving the cleaner to the location where the cleaner is installed. There is no need to worry about removing the .

■Since there is no need to use dirty blackboard wipes or chalk as in the past, it is more hygienic as there is no need for unnecessary chalk powder to scatter and stain clothes or cause respiratory diseases.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view thereof, and the third circle is 1-. 1-line sectional view, FIG. 4 is a plan view showing another example of a blackboard wiping shelf, FIG. 5 is a perspective view showing an embodiment of a leaner suitable for the apparatus of the present invention, and FIG. It is a sectional view showing an example for installing a blackboard wiping shelf in an existing blackboard receiving gutter. (1): Blackboard (2): Receiving gutter (2a), (2b): Part of the bar (2c): Jetty (2d): End portion (2e): Connecting step (3): Blackboard wiping shelf ( 3a) : Ledge pillar (3b) : Fusoku part (4) : Side cassop (5) : Cleaner patent applicant Yuki Mori Male agent Masu Tebori (and 2 others)

Claims (1)

[Scope of Claims] 1. A chalk powder receiving gutter that is attached to protrude forward at the bottom of the blackboard, and a frame structure that is removably provided with a predetermined space above the gutter and that allows chalk powder to pass through. A blackboard chalk dust receiving device consisting of a blackboard wiping shelf and a blackboard wiping shelf. 2. The chalk powder receiving device for a blackboard according to claim 1, wherein the chalkboard wiping shelf is installed with an inclination such that the blackboard side is higher than the dust receiving gutter.