JPH0517027Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a manual blackboard wiping device, and more specifically, it is a manual blackboard wiping device that can be carried freely to a place where a blackboard is located, and can remove chalk stuck to the blackboard wiping device. To provide a manual blackboard wiping device which settles powder in a short time without raising it into dust and allows the blackboard wiping device to be taken out from a container immediately after cleaning.

[Conventional technology]

Manual blackboard wipers include those that wipe off the blackboard by manually rotating a roller brush, those that use a gear mechanism to manually strike the blackboard wiper, and those that wipe the blackboard by manually rotating the roller brush. There is a known structure in which the brush is slid onto a brush by being gripped and moved back and forth.

The vacuum cleaners having these configurations have the advantage of being able to easily wipe off chalk powder adhering to the blackboard wiper.

[Problem that the invention attempts to solve]

However, the above-mentioned conventional manual blackboard wiping device has unresolved sanitary problems such as the flying up of chalk powder dust generated during wiping and cleaning of the blackboard. By the way, many electric type blackboard cleaners have been proposed to solve this problem, but since the electric type requires electrical power, the user cannot move it to any location and use it. There is a problem.

The present invention was devised in response to the above-mentioned problems, and its purpose is to prevent the chalk powder dust from being scattered outside when cleaning the blackboard wiper, and to remove the chalk powder from inside the vacuum cleaner once. To provide a manual blackboard wiping device capable of quickly and surely wiping a blackboard even in a place without a power source by settling chalk powder dust scattered in the device in a short time.

[Means for solving problems]

The manual blackboard wiping device as a means for achieving the above object is a manual blackboard wiping device for removing chalk powder accumulated on a blackboard wiping device, and is a blackboard wiping device that has a brush inside the container box. and a cylinder chamber having a piston, the blackboard wiping chamber has a hole for a blackboard wiping set, the brush is arranged to be reciprocating or rotatable within the cleaning chamber in conjunction with the piston, and When the blackboard wiper is set in the blackboard wiper set hole, the cleaning chamber is located at the area where the blackboard wiper is to be wiped, and the cleaning chamber and the cylinder chamber are connected via a filter, and the cylinder chamber is cleaned. It has a configuration in which an on-off valve (check valve) that opens only when the cylinder volume decreases is provided on the side communicating with the chamber, and a ventilation hole is provided on the other side.

Here, in the above structure, the blackboard wiping chamber usually has a hole for a blackboard wiping set on the upper surface thereof, and the filter has a connection point between the partition wall plate and the rising face plate that separate the blackboard wiping chamber and the cylinder chamber. It is configured to be attached to the rising face plate of a key-shaped partition plate forming an obtuse angle.

[Effect]

Based on the above configuration, the manual blackboard wiping device uses a piston to reciprocate or rotate the brush in the room several times in succession, thereby wiping the blackboard with the brush to remove chalk powder. Chalk powder becomes dust and floats in the cleaning chamber, but it is carried by the airflow generated in the cleaning chamber by the reciprocating or rotating movement of the piston, and is attracted to the filter, where it settles down in a short time and most of it is removed. drops to the bottom of the cleaning room, and the blackboard wipe itself works to clean it neatly.

〔Example〕

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

Here, FIGS. 1 to 7 show embodiments of the present invention,
Figure 1 is a perspective view, Figure 2 is a vertical sectional view, Figure 3 is a sectional view taken along line A-A in Figure 2, Figure 4 is a sectional view taken along line B-B in Figure 2, and Figure 5 is a brush and piston. FIG. 6 is an explanatory view of the effect when the brush is moved toward the front side of the container box, FIG. 6 is an explanatory view of the effect when the brush is moved in the opposite direction to that in FIG. 5, and FIG. 7 is a perspective view of the brush and the piston.

The manual blackboard wiping device of this embodiment has a container box 11.
, a brush 12 and a piston 13 that reciprocate at the same time inside the container box 11, and a filter 14.
It can be broadly divided into

The interior of the container box 11 is divided into two upper and lower chambers, a blackboard wiping chamber 16 and a cylinder chamber 17, by a partition plate 15. Here, the partition plate 15 is formed as a key-shaped partition plate in which a connection point between a partition plate 15a that separates the blackboard wiping room 16 and the cylinder chamber 17 and a rising face plate 15b forms an obtuse angle.

The blackboard wiping room 16 has a blackboard wiping device 1 on its upper surface.
8 is opened, and the blackboard wiping surface 20 is placed in the cleaning room 16 with the blackboard wiping surface 20 facing downward as shown by the imaginary line in FIG. It is arranged so that it will face you. The cylinder chamber 17 also has an on-off valve 21 on its front plate.
and a ventilation hole 22 on the back plate.

The brush 12 reciprocates within the blackboard wiping device 16, and has curved bristles planted on a brush base 12a in a shape that almost matches the blackboard wiping surface 20. Concave grooves 121, 121 are formed on both sides of the brush base 12a, and the concave grooves 12
1, 121 respectively fit into a pair of rails 161, 161 provided on both sides of the cleaning chamber 16,
The brush 12 is configured to reciprocate back and forth along the rails 161, 161. Further, a brush rod 122 is protruded from the brush base 12a, and the rod 122 protrudes outward from the center of the front panel of the blackboard wiping room 16.

The piston 13 reciprocates within the cylinder chamber 17 at the same time as the brush 12, and its piston rod 132 projects outward from the center of the front plate of the cylinder chamber 17, and the projecting end of the piston rod 132 and the brush rod The protruding end of the brush 122 is connected in a U-shape, and a handle 23 is attached to the connecting rod 23a to serve as a reciprocating handle for the brush 12 and the piston 13. In addition, the piston 13
It is formed by sandwiching an elastic material 133 such as felt between two mating plates 131, 131.

The filters 14 are small mesh filters that do not allow chalk powder to pass through, and are removably attached in pairs to the upper portion of the rising face plate 15b of the partition plate 15. In order to prevent the chalk powder wiped by the brush 12 from flying directly onto the filters 14, 14, a chalk powder receiving plate 24 is provided near the filter 14 to protect the filters 14, 14. There is. Further, the filter 14 may be arranged on the brush 12 or the brush rod 12a as necessary.

Next, the present embodiment operates based on the above configuration.

That is, if the blackboard cleaning device of the present invention is placed in a place where a blackboard is located, such as a school classroom, a company conference room, or various seminar venues, for example, a teacher can wipe the blackboard 18 during a lecture using the virtual As shown by the line, set it in the blackboard wiping set hole 19 and hold it down with one hand, while grasping the handle 23 of the connecting part of the protruding end of the piston rod 132 and brush rod 122 with the other hand and push and pull it several times in succession. When the piston 13 and the brush 12 are simultaneously reciprocated in each chamber, the brush 12 is moved to the blackboard wiper 1.
The blackboard wiper 18 slides on the peripheral surface 20 of the blackboard wiper 18 and wipes off chalk powder adhering to the peripheral surface of the blackboard wiper 18. At this time, with each push and pull, most of the chalk powder is brushed off to the front and back sides of the cleaning chamber 16, hits the back plate on the back side and falls, accumulates in the corner, and on the front side, the chalk powder is brushed off to the back side of the cleaning chamber 16. It hits the plate 24 and falls, and accumulates in the lower part of the receiving plate 24. Further, the fine chalk powder that is thrown up as dust is collected on the filters 14, 14 by the action described below. That is,
When the piston 13 is pushed to the rear side and stopped after several times of continuous pushing and pulling, as shown in FIG. When the valve 21 is closed, the air inside the cleaning chamber 16 is filtered through the filters 14 and 1.
4 into the depressurized part of the cylinder chamber 17, the air in the cleaning chamber 16 flows in the direction of the arrow, and the chalk dust is carried along with this flow and moved to the filter 1.
4, 14 and is attracted and collected by the filters 14, 14. However, the above handle 2
3, each time the piston 13 and the brush 12
is continuously reciprocated, and when the piston 13 is pulled toward the front, outside air enters the cylinder chamber 17 from the vent hole 22 as shown by the arrow in FIG. 6, and the air flowing from the cleaning chamber 16 is compressed. The on-off valve 21 is opened, and the air is exhausted from the on-off valve 21.
At this time, compressed air is also supplied to the filters 14 and 14 until the on-off valve 21 opens.
4 and into the cleaning chamber 16, the chalk powder collected on the filter 14 becomes somewhat dispersed, and the chalk powder floats around the filter 14 during several continuous pushes and pulls, and remains in an unstable state. However, as mentioned above, since the piston 13 is finally stopped in the state shown in FIG. 6, the floating powder is collected on the filters 14, 14 in a few seconds, and even if the blackboard wiper 18 is picked up, the blackboard wiper set hole 19 remains open. This works to prevent chalk dust from flying up.

Note that if the filter 14 is left as it is for a long time, it will become clogged with chalk powder and become less effective, so it is necessary to clean it from time to time to shake off the collected powder.

By the way, in the above embodiment, the blackboard wiping chamber and the cylinder chamber are formed in vertical positions, but the present invention is not limited to this configuration, and for example, they may be formed in left and right positions. It can also be used as a thing. In addition, a setting hole for setting a chalkboard wiper is formed on the side of the cleaning chamber instead of the top surface, and the brush is moved back and forth in the vertical direction. It is also possible to adopt a configuration in which the container is installed in a detachable manner and can be taken out.

In addition, in the above-described embodiment, the brush is moved back and forth when cleaning a rectangular blackboard. However, when cleaning a blackboard with a circular or elliptical shape, the brush is rotated. It is clear that a configuration may be adopted in which the attached chalk powder is wiped off.

Incidentally, it is clear that the present invention is not limited to the embodiments described above, and includes modifications that can be made without changing the gist of the present invention.

[Effect of idea]

As is clear from the above description, the manual blackboard wiper of the present invention has the effect of quickly and reliably cleaning the blackboard without scattering chalk powder outside the cleaner. have

Further, the manual blackboard wiper of the present invention does not require a power source as a driving source and has a compact structure, so the blackboard can be carried and used at a certain location as needed.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention, with Figure 1 being a perspective view, Figure 2 being a longitudinal sectional view, and Figure 3 being Figure 2A-
Figure 4 is a sectional view taken along line A, Figure 4 is a sectional view taken along line B-B in Figure 2, Figure 5 is an explanatory diagram of the action when the brush and piston are moved to the front side of the container, and Figure 6 is the opposite of Figure 5. FIG. 7 is a perspective view of the brush and the piston. 11... instrument box, 12... brush, 13... piston, 14... filter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A manual blackboard wiping device for removing chalk powder accumulated on a blackboard wiping device, which includes a blackboard wiping chamber with a brush inside the device box and a cylinder chamber with a piston. The blackboard wiping chamber has a hole for a blackboard wiping set, the brush is arranged to move reciprocatingly or rotatably within the cleaning chamber in conjunction with the piston, and a blackboard wiping set is provided in the blackboard wiping set hole. When the wiper is set, it is located in the area where the blackboard wiper is to be wiped, and the cleaning chamber and the cylinder chamber are connected via a filter, and the cylinder chamber is located on the side communicating with the cleaning chamber. A manual blackboard wiping device characterized by having an on-off valve that opens only when the cylinder volume becomes small and having a ventilation hole on the other side. (2) The manual blackboard wiping device according to claim 1, which has a hole for a blackboard wiping set on the top or side of the blackboard wiping chamber. (3) A request for utility model registration in which the filter is attached to the rising face plate of a key-shaped partition plate in which the connection point between the partition plate and the rising face plate that separates the blackboard wiping room from the cylinder room forms an obtuse angle. A manual blackboard wiping device according to item 1.