JPH02151500A - Dust collecting blackboard wiper - Google Patents

Abstract

PURPOSE:To provide a dust collecting blackboard wiper contributing in the aspect of health and cleaning by providing a dust sump in the case in the vicinity of the matching surfaces of freely separable upper and lower cases and providing a suction port to the bottom plate of the lower case and arranging a fan to the air flow passage between suction port and the dust sump. CONSTITUTION:When the characters written on a blackboard by chalk are erased using a dust collecting blackboard wiper, said wiper is held to rub off the characters on the side of a wiping member 36 thereof. At this time, a switch 66 is turned ON and, even when a chalk powder is generated, said powder is sucked by a fan 64 and successively sucked in a suction cylinder 22 from a suction port 16 through small suction holes 40 and an auxiliary space. Further, the sucked chalk powder goes to a discharge port from the fan 64 but filtered by the filter 56 provided therein to be stored in a dust sump 28. When the dust sump 28 is filled, a lock member 54 is operated to separate upper and lower cases 44, 12 and the lower case 12, that is, a wiping part 10 is inverted to dispose dust such as the chalk powder to a predetermined place.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a blackboard wiper having the function of collecting chalk dust and the like.

Conventional technology Traditionally, blackboards were installed on walls, etc. as simple information transmission boards.
It is widely used in schools, offices, factories, and other places because it can be written on with chalk and easily erased by wiping the blackboard. A blackboard usually has channels along its bottom edge to catch chalk dust. In addition, large blackboards used in schools are equipped with boxes for collecting powder in some of the receivers. If a receiver is installed in this way, even if powder is generated when erasing letters, etc. with a blackboard wipe, or directly when writing letters, etc., it will fall onto the receiver, so there is no need to worry. It is convenient to store it in the container and pick it up when cleaning. For wiping the blackboard, use a rectangular board with a capillary layered wiping cloth attached to one side.

Problems to be Solved by the Invention However, such blackboard wiping involves simply holding the board in one's hand and rubbing the cloth side of the board against the surface of the blackboard to erase letters, etc. Moreover, chalk is made by kneading powdered calcined gypsum with water and hardening it into a stick shape, so it is brittle and easily turns into powder. For this reason, the more you write on a blackboard, the more powder you generate when you erase it, the equivalent to the number of sticks of chalk you use. Large pieces of chalk powder fall immediately onto the tray and accumulate there, but small pieces are light and tend to float in the air without falling. Also, even objects that fall onto the tray or the floor will somehow rise up into the air again.

For this reason, most chalk dust is generated near the blackboard, but it gradually spreads throughout the room. In particular, since many pieces of chalk are used in school classes, teachers and students naturally end up inhaling a lot of chalk powder.

It is not healthy to continue breathing in chalk powder, which is a foreign substance, for many years, and even if it is not as obvious as silicosis, it may be the causative agent of the disease. Also, chalk powder makes the room dirty.

The present invention has been made by focusing on such conventional problems, and an object of the present invention is to provide a dust-collecting blackboard wipe that reduces the amount of chalk powder floating in the air and contributes to health and cleaning. With the goal.

Means for Solving the Problems Means for achieving the above object will be explained below with reference to FIGS. 1 and 4, which correspond to embodiments.

This dust-collecting blackboard wipe has a case with a built-in fan 64 for sucking dust, which is combined at the seam, and an upper and lower case 44 that can be separated.
12, a dust reservoir 28 is provided in the case near the seam, a suction port 16 is opened in the bottom plate 14 of the lower case 12, and a fan 64 is arranged in the air flow path between the suction port 16 and the dust reservoir 28. A wiping member 36 covering the bottom plate 14 is fixed to the lower case 12, and a plurality of small suction holes 40 communicating with the suction port 16 are provided in the wiping member 36.

At that time, a plurality of small holes are provided between the bottom plate 14 of the lower case 12 and the wiping member 36 (a separation member 30 is interposed), and a plurality of small holes are provided in the wiping member 36 between the bottom plate 14 and the wiping member 36. It is preferable to form an auxiliary space 32 to which the small holes 40 are connected.Also, it is preferable to use a resilient wiping member or a laminate of a cushion member 34 and a wiping member 36 as the wiping member 36.

Function When configured as described above, the upper and lower cases 44.12 are combined at the seam and can be separated, the dust reservoir 2B is provided inside the case near the seam, and the suction port 16 is provided on the bottom plate 14 of the lower case 12. Since the fan 64 is placed in the air flow path between the suction port 16 and the dust reservoir 28, the dust such as chalk powder sucked in from the suction port 16 by the fan 64 is temporarily transferred to the dust reservoir 28. After collecting and storing, the upper and lower cases 44.12 can be separated as appropriate, taken out from there, and disposed of at a predetermined location. Further, a wiping member 36 is fixed to the lower case 12 so as to cover the bottom plate 14 from the outside, and the wiping member 36 has a plurality of small suction holes 4 communicating with the suction port 16.
0, when you take a blackboard wiper and scrub the letters written on the blackboard with the wiping member 36, chalk powder will be generated, but it will be absorbed by the suction hole 4 nearby.
0 and is sequentially sucked into the suction port 16. or,
If the auxiliary space 32 is formed between the bottom plate 14 of the lower case 12 and the wiping member 36, each small suction hole 40 provided in the wiping member 36 only has to reach any part of the wide auxiliary space 32. This makes it easier to form the small suction holes 40. Then, all the dust that has passed through each suction hole 40 is temporarily removed from the auxiliary space 3.
2, it is smoothly sucked into the suction port 16 from there.

Furthermore, if the cushion member 34 is laminated on the wiping member itself or the wiping member 36 to give it elasticity, a moderate cushioning effect can be exerted during the wiping process, improving workability and preventing excessive force from being applied to the wiping member 36. I don't work.

Example Hereinafter, the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a diagram showing the structure of a wiping part of a dust-collecting blackboard wiping device to which the present invention is applied, and corresponds to a longitudinal section taken along the line AA in FIG. 2. FIG. 2 is a plan view of the wiping section, and FIG. 3 is a bottom view. In the figure, 10 is the wiping part of the dust collection blackboard wiping, and 12 is the lower case made of resin, which is the core thereof. This lower case 12 has a suction port 16 in the center left side of the rectangular bottom plate 14, and has peripheral walls 18 and 20 projecting upward and downward from the four sides of the suction port 16, respectively. A suction cylinder 22 is provided protrudingly. The upper peripheral wall 18 is provided with a step on the outside that fits into the peripheral wall of the upper case, which will be described later, and a locking recess 24 and a latching recess 26 (
26a, 26b) are provided. Note that the inside of the upper peripheral wall 18 is made into a dust reservoir 28 for collecting chalk powder and the like. Further, a step is provided on the inside of the lower peripheral wall 20, and a member having a large number of small holes, such as a perforated plate 30, is installed thereon, and a wide but low-height auxiliary space 32 is formed below the bottom plate 14. do.

If a bendable wire mesh or the like is used as the member provided with a large number of small holes, a support projection is appropriately provided on the lower surface of the bottom plate 14 and abuts against the member to secure an auxiliary space. Further, a laminated body 3B of a cushion member 34 such as a sponge and a wiping member 36 such as a kohl towel is arranged so as to cover the member 30 provided with a large number of small holes from the outside, that is, from the bottom, and the wiping member 36 is
is fixed to the outside of the peripheral wall 18, 20 of the lower case 12 in a band shape. At that time, adhesive, double-sided adhesive tape, etc. are used. Furthermore, the laminate 38 has small suction holes 4 penetrating in the vertical direction.
A large number of 0's are distributed and provided at equal intervals, for example, in 5 rows and 6 columns.

If the member 30 provided with a large number of small holes is interposed as a separating member between the bottom plate 14 of the lower case 12 and the laminate 38 to form an auxiliary space 32, each suction provided in the laminate 38 Since the small hole 40 only needs to reach any part of the wide auxiliary space 32, it becomes easier to form the small suction hole 40. All the dust passing through each small suction hole 40 once reaches the auxiliary space 32, and then is smoothly sucked into the suction port 16 from there. Note that when the separation member 30 is not used, the bottom plate 14 is directly covered with the laminate 38, and each small suction hole 4 is
0 is communicated with the suction port 16. Furthermore, if the cushioning member 34 is laminated on the wiping member 36 to give it elasticity, it can provide an appropriate cushioning effect during the wiping process, improving workability and preventing undue force from being applied to the wiping member 36, thereby preventing tearing. Lasts a long time. Note that it is also possible to use only the wiping member 36 without using a laminate. Alternatively, the wiping member itself may have elasticity.

FIG. 4 is a side view of a dust-collecting blackboard wiper in which such a wiping unit 10 and a paired dust-collecting unit 42 are combined.

In the figure, numeral 44 denotes an upper case that forms the outer shell of the dust collecting section 42, and has an external appearance that is symmetrical with the wiping section 10 above and below the entrance. That is, the upper plate 46 is located at a position corresponding to the bottom plate 14 of the lower case 12.
A peripheral wall 48 vertically protrudes downward from its four sides, and a dome-shaped top plate 50 is installed above. Several, for example, three, parallel grooves 52 are provided on the outside of this peripheral wall 48 to prevent fingers from slipping, forming an uneven surface.
In order to hook into the locking recesses 24 and latching recesses 26 of the upper and lower cases 12, which have steps on the inside that fit into the peripheral walls 18 of A latching protrusion is provided on each. Therefore, the dust collecting blackboard cleaning case can be combined and separated at the joint between the upper and lower cases 44.12. Further, on the rear surface of the peripheral wall 48, a discharge port is partially opened at a location corresponding to the groove 52, which is partially hung on both sides, and the outlet is closed from the inside with a filter 56. Therefore, the dust is filtered out by the filter 56 and collected on the bottom plate 14 in the vicinity thereof, which becomes the dust reservoir 28. Note that 58 is a lid that corresponds to a part of the top plate 50 that covers the area where the dry cell battery 60 is stored. Inside the upper case 44, there is an upper plate 46.
A motor 62 and a fan 64 are installed above and below, respectively.

The motor 62 is powered by a dry battery 60 and is a fan driving motor that provides driving force to the fan 64. Furthermore, the switch 66 is a push button switch, a slide switch, or the like, and is placed facing the front or side surface of the top plate 50. or,
The fan 64 is arranged in the air flow path between the suction port 16 and the dust reservoir 28 for dust suction, but it is preferably installed close to the upper part of the suction tube 22.

To erase characters written in chalk on a blackboard using such a dust-collecting blackboard wipe, hold it and wipe the wiping member 3.
On the 6th side, make out one letter, etc. At that time, the switch 66 is turned on and the fan 64 is rotated. Then, even if chalk powder is generated, it is sucked by the fan 64, passes through the nearby suction hole 40, passes through the auxiliary space 32, and is sequentially sucked from the suction port 16 into the suction tube 22. Furthermore, the chalk powder sucked in flows from the fan 64 to the exhaust port, where it is filtered out by a filter 56 and sent to the dust reservoir 2.
8, the switch 66 is turned off when not in use. When the dust reservoir 28 becomes full due to repeated use, operate the locking member 54 to close the upper and lower cases 44.
12 is separated, the lower case 12, that is, the wiping part 10 is turned upside down, and dust such as chalk powder is thrown away at a predetermined location. After that, the latching protrusion of the upper case 44 is inserted into the latching recess 26 of the lower case 12, the upper and lower cases 44.12 are stacked, and the locking member 54 is operated to combine the wiping part 10 and the dust collecting part. 42 are joined together, allowing the following uses.

According to the present invention, which has been described in detail, dust such as chalk powder generated when wiping a blackboard can be immediately isolated in a dust reservoir, thereby reducing the amount of floating chalk powder indoors, etc. can contribute to creating an environment that is excellent in terms of health and cleanliness. In addition, in the case of a device provided with an auxiliary space, it is easy to form a small suction hole, and the suction action can be performed smoothly. Furthermore, by imparting elasticity to the wiping member, a cushioning effect will work during wiping, improving workability, and since no undue force is applied to the wiping member, the member itself will last a long time without tearing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the structure of a wiping part of a dust-collecting blackboard wiping device to which the present invention is applied, and corresponds to a longitudinal sectional view taken along the line AA in FIG. 2. FIG. 2 is a plan view of the wiping section, and FIG. 3 is a bottom view. FIG. 4 is a side view of a dust-collecting blackboard wiper in which a pair of dust-collecting parts are combined with the same wiping part. 10... Wiping part 12... Lower case 14... Bottom plate 16... Suction port 28... Dust reservoir 30...
Separation member 32... Auxiliary space 34... Cushion member 36... Wiping member 40... Small suction hole 42.
...Dust collection part 44...Upper case 54...Lock member 64...Fan patent applicant Takashi Tsu Takashi Yoshihito Patent attorney Daisaku Yanagisawa Figure 1 28 Top dust reservoir 36 Wiping member 60 Separation Part 32 Auxiliary space 40 Suction hole 34, Nyon member Figure 3 L

Claims (3)

[Claims] (1) Cases containing a built-in fan that sucks out dust are combined at the seam to form a separable upper and lower case, a dust reservoir is provided inside the case near the seam, and a suction port is opened in the bottom plate of the lower case. A fan is placed in the air flow path between the suction port and the dust reservoir, a wiping member that covers the bottom plate from the outside is fixed to the lower case, and a plurality of small suction holes are provided in the wiping member to communicate with the suction port. Features a dust-collecting blackboard wipe. (2) A separation member having a plurality of small holes is interposed between the bottom plate of the lower case and the wiping member, and an auxiliary space is formed between the bottom plate and the wiping member to which the plurality of suction holes provided in the wiping member are connected. The dust-collecting blackboard wipe as described in item 1. (3) The dust-collecting chalkboard wiping according to item 1 or 2, wherein the wiping member is a resilient wiping member or a laminate of a cushion member and a wiping member.