KR19990082692A - Method and device for automatically erasing letters on an water cleaning board - Google Patents

Abstract

The present invention relates to a water cleaning blackboard erasing method and apparatus for cleaning and erasing a chalk recording layer recorded on a board writing surface of a blackboard using a predetermined cleaning liquid.

The most important invention of the present invention is that the erasing device (here, means cleaning means including a brush and a wiper member) reciprocating from one end of the board to the other end of the board is the board of the board in the road. After completing one erase operation in accordance with the written letter, it is to implement a round trip driving system that can perform the erase operation under the same conditions as in the back road.

For example, whenever the driving direction of the erasing device is changed, the contacting part which is in close contact with the writing surface is changed to the non-contacting state, and the non-contacting part forms the same erasing environment when the erasing device reciprocates through the variable contact means. .

That is, in the present invention, when the brush first washes and erases the chalk recording layer recorded on the writing surface, the wiper member follows the back, and when viewed from the driving direction to remove the remaining cleaning liquid remaining on the writing surface of the blackboard. The erasing device in which the brush is located in the front and the wiper member is located in the rear, and the configuration is always operated in the same direction even if the erasing device proceeds in either direction of the reciprocating path.

On the other hand, both the brush and the wiper member may be used for cleaning and erasing only on the road and setting the sequence of operation to remove the return device from the return path. Another object of the present invention is to completely prevent secondary contamination of the board so that the contaminants on the brush and the wiper member do not contaminate the writing surface again by retreating from the writing surface by a predetermined interval. .

Thus, in the present invention, the brush which performs cleaning and erasing operations on the writing surface firstly and the wiper member which cleanly removes the residual cleaning liquid remaining on the writing surface while following the back of the brush are not constituted by separate moving bodies. It is possible to perform cleaning and erasing operation by limiting to one way only in the royal road while being included in the scavenging device of the exhaust system. The present invention relates to a method of erasing a water-cleaning blackboard and a device thereof.

Description

Method of erasing water cleaning blackboard and its device {METHOD AND DEVICE FOR AUTOMATICALLY ERASING LETTERS ON AN WATER CLEANING BOARD}

The present invention relates to a method of erasing a cleaning blackboard and an apparatus thereof.

To explain this in more detail, the water for erasing the chalk recording layer described in various forms such as letters, numbers, figures, symbols, etc. on the writing surface (recording surface) of the board with a cleaning liquid. A method of erasing a cleaning blackboard and an apparatus thereof.

The erasing method and apparatus thereof of the present invention will be applied to a chalk board in which chalk particles are to be peeled off from a fine uneven surface. In the case of the white board, since the writing surface is smooth and the writing medium is a volatile ink, the written records can be easily erased simply by rubbing in a conventional manner, so it is necessary to apply the erase method and apparatus according to the present invention. There is no

Conventionally, a cloth eraser made by sewing a piece of cloth was used to erase the chalk recording layer written on the surface of the blackboard.

However, clearing the blackboard using a celestial eraser will not only irritate the mucous membranes of the nose and cause diseases of the respiratory system as the chalk is scattered when the blackboard is erased. There was a problem to shake off the chalk again.

For this reason, it was inevitable to create an unfavorable educational environment not only for school teachers and instructors who should always use the blackboard, but also for students and students who are trainees.

And most of all, the surface of the board is not a perfect smooth surface, but has a constant surface roughness to prevent the sliding of the chalk, so if you write with chalk on it, the chalk particles will appear on the minute irregularities of the writing member. Because of the pinch, the cloth eraser was not only difficult to erase cleanly, but it was not good because the trace was erased.

In order to alleviate this drawback, the applicant of the present invention proposed the domestic patent application No. 6688 as prior art in 1998.

The above-mentioned patent application No. 98-6688 is a board body or a plurality of rollers, both ends of which are wound around a plurality of rollers having a constant interaxial distance and driven by winding a belt-shaped endless board having high flexibility. Each coil is wound one by one and a power shut-off device such as an electronic clutch is interposed thereon to wind the board at one roller, and the other side of the roller is turned off to release the board at a relatively high speed. The rotating erasing member (specifically, the brush) is moved in sliding contact with the blackboard body to erase the chalk layer attached to the surface of the board.

Prior art according to the above-mentioned patent application No. 98-6688

① In the case of the endless boards in which the boards are connected in a long ellipse shape and formed in a belt shape, there may be a combined error in which the machining and assembly errors are combined in the connecting process.

Synthetic error of the board is very disadvantageous in the way of driving the blackboard body, such as the prior art board moving surface.

That is, when the board board board is connected in an endless shape and the above processing errors and assembly errors occur, it is easy to show the property of the board to be biased toward either the top or the bottom of the board during actual driving.

In order to correct the deflection of the board, a separate steering device must be installed.

② In the blackboard of the main body direct drive method, the flexible board is wound around the outside of the driving roller having a diameter of a certain size and embedded in the hollow part of the blackboard frame, so all the driving devices are all concentrated inside the blackboard body. Therefore, there is a drawback that the thickness of the blackboard frame becomes excessively large, and the entire blackboard is weighted, resulting in poor handling.

③ As described above, the blackboard of the main body direct drive method is constructed so that the entire board material is installed inside the frame of the board, and thus the board body structure that operates the board's writing surface and the cleaning and erasing of the writing surface are erased. It is difficult to avoid the mutual interference of two different technical configurations of the members.

Such a design in which mutually separate technical configurations are arranged adjacent to each other is not very desirable in terms of maintenance, and in the case of any particular parts replacement, work by first dismantling other peripheral facilities installed nearby. This is accompanied by inconvenience, such as the need to secure space.

In order to solve the drawbacks of the above-mentioned patent application No. 98-6688, the present inventors follow the erasing member and the back of the erasing member which are supplied with the cleaning liquid by a predetermined cleaning liquid supplying means with respect to the flat plate-shaped non-moving flat blackboard ( 잔류) Residual cleaning liquid removal member (hereinafter referred to as wiper member) is left in contact or non-contact state. By moving horizontally to the right, he created a technique to erase the chalk layer attached to the board's writing surface (the board's surface).

The most important invention creation idea in this invention is

① Erasing member and wiper member moving horizontally from one end of the board to the other end move horizontally on the road and finish the one erasing operation. To be automatically switched to elimination conditions.

That is, in any case of the reciprocating path, the erasing member supplied with the cleaning liquid first acts on the writing surface of the blackboard to erase the chalk layer, and then the wiper member is left on the writing surface of the blackboard while following the erasing member. The principle of creation of this invention is the patent idea that the so-called pre-clearing member and the post-wiper member's front and rear inertia are always established to cleanly remove any residual cleaning solution. .

② Next, another important invention idea of the present invention is to perform the erasing action only in the royal road while the erasing member and the wiper member sequentially act on the writing surface of the blackboard body to which the chalk recording layer is attached. In the returning return path, both the eraser and the wiper member are returned to their original positions while being separated from the writing surface by a predetermined distance, thereby completely preventing secondary contamination on the writing surface of the blackboard. To provide a method and apparatus for erasing the chalk layer attached to the writing surface of the.

In detail, when the board user defines the entire chalk record written in chalk on the writing surface of the board as the first pollution of the board, the second pollution is the board of the board like the erase member or the wiper member. It refers to a form of contamination in which the contaminated cleaning liquid on the eraser member or wiper member contaminates the board writing surface again because the erasing device that directly erases the chalk recording layer attached to the writing keeps contacting the writing surface unnecessarily even after cleaning is finished. .

As described above, the embodiment in which the washing and erasing operation is carried out only in the west road and the mute return-free in the return road is not preferable as a commercial washing and erasing method. It may be thought that it does not.

However, the one-way elimination method of the present invention can simplify the technical configuration relatively, since it is possible to exclude a plurality of components of the erasing apparatus conventionally employed in the reciprocating erase method, which is another embodiment of the present invention. have.

Therefore, the erasing device also has the advantage that it is desirable when applied to a small board because it is possible to compact (Compact).

This one-way elimination method reliably protects the basic role during the erasing operation of the pre-erase member and the post-wiper member, which is the inventive concept of the present invention, as well as the erase member and the wiper member. There is no doubt that the two components are included in the scope of the present invention in that they interact with each other as if they were one object.

As described above, in the embodiment of simply returning without performing the erase operation in the return path, it is necessary to prevent the secondary pollution mentioned above that both the erasing member and the wiper member should be separated by a predetermined distance from the writing surface of the board. Do.

Furthermore, when either of the eraser and the wiper member is brought into contact with the board surface of the board, excessive contact friction promotes abrasion of the member and the board surface, and the resistance due to relative contact is transmitted to the motor drive by overload. Since it may cause damage to the motor, it is necessary to separate the return member together with the wiper member to prevent this.

The inventor of the present application selected a cylindrical brush (hereinafter simply referred to as brush) through numerous experiments as an erasing member that most effectively washes and erases the chalk layer attached to the writing surface of the board.

As an example of the structure of this brush, it is preferable to wind and form the short, dense-finished belt on the outer periphery of the cylindrical roller support shaft.

On the other hand, the present inventors have experimentally concluded that it is most appropriate to have the wiper member have a configuration of partial free support.

That is, the support side of the wiper member formed of synthetic rubber surface-treated with flexibility to prevent the surface from being worn well is fixedly inserted into the support groove in the block by widening the contact area and making the thickness relatively large, and extending to the support side. By configuring the free side of the triangle to protrude out of the supporting groove freely at the tip of the neck, the residual cleaning liquid on the board's writing surface is perfect as if the tip is flipped on the board's writing surface and sweeped with a broom. Be able to skim down.

In the present invention, it is preferable to use a steel member, a synthetic resin sheet, or the like as the material of the board surface of the board.

As a cleaning method for the brush, the brush hair length and rotational speed of the brush were determined by an appropriate value through experiments, and the brush was self-purified by selecting a method of self-cleaning. The detailed description will be made later.

1 to 8b are views showing a first embodiment of the present invention.

1 is a front view of a cleaning blackboard showing the inside of a running casing;

Figure 2 is a side cross-sectional view showing the coupling relationship between the running casing and the blackboard body

3 is a plan sectional view showing a main part of the running casing;

4 is a power transmission system diagram of the variable contact means

5A is a state diagram in which the erasing device maintains a neutral state

5B is a view showing that the erasing device is in a close contact state.

5B shows that the erasing device is in a close contact state.

6 is an arrangement state of the gear group included in the brush driving means and the variable contact means;

7 is a power transmission system of the brush drive means

8A to 8B are exemplary views showing a design change of the erasing device.

9A to 10 are diagrams illustrating a second embodiment of the present invention.

9A shows that the erasing device is in a close contact state.

9B shows that the erasing device is in a close contact state.

10 is a side cross-sectional view of the blackboard body and the running casing in a state assembled;

11 to 12 are views showing a third embodiment of the present invention.

11 is a plan view showing the main parts of the erasing apparatus;

12 is a front view according to FIG.

Explanation of symbols for main parts in the drawings

100-Chalkboard Body 101-Writing Board

130-Drive casing 139, 239, 339-Timing belt

140-Cleaning device 141-Brush

142-wiper member 150-cleaning liquid supply means

160-Position sensing means 170-Driving guidance means

172-Moving member 180-Brush driving means

181-Brush Drive Motor 190-Variable Plate

200-Variable contact means 210-Upper plate

214-Retreat Motor 260-Block Body

264-Circular guide 270-Eccentric shaft

282-Sensor dock 283-Proximity sensor

284-Screw Shaft 285-Screw Block

286-Support Block

The present invention provides a blackboard main body 100 in which a predetermined driving guide means 170 is formed along an erasing direction on a blackboard protection frame 105 supporting the outer surface of a writing surface,

The chalk layer adhered to the writing surface 101 is supplied with the cleaning liquid from the predetermined cleaning liquid supply means 150 while slidingly rotating in a circumferential state with respect to the writing surface 101 of the floating blackboard body 100. Brush (141L), (141R) to wash and erase,

The wiper members 142L and 142R which sweep down the remaining cleaning liquid buried on the writing surface 101 while always following the back of the brush, and

By controlling the brush 141L, 141R and the wiper members 142L, 142R together or controlling only one of them, the brush is configured to determine the contact or non-contact portion with respect to the writing surface of the blackboard body 100. And a variable contact means 200 for varying the position of the wiper member.

First, the components common to all the embodiments of the present invention will be described with reference to FIGS.

Reference numeral 101 denotes a writing surface of a board made of steel or synthetic boards, and 105 denotes a board protection frame that supports the board 101 to be wrapped around the outside so that the writing surface 101 maintains a flat plate shape. .

Including this writing surface 101 and the blackboard protective frame 105, the board body 100 is defined.

A fixing part of the predetermined travel guide means 170 is formed on the board protection frame 105 along the erasing direction of the writing surface shown by an arrow in FIG. 1.

In the present invention, the fixed portion of the travel guide means employs a rack gear 171, and the driving part of the travel guide means engaged with the rack gear is the pinion gear 174 shown in FIG.

Strictly speaking, the traveling casing 130, which engages with the rack gear 171 and accommodates all of the erasing apparatus necessary for cleaning and erasing the chalk layer attached to the writing surface 101, has the pinion gear ( 174) therein.

Accordingly, the pinion gear 174 is engaged with the rack gear 171 formed on the board protection frame 105, and the traveling casing 130 is driven horizontally in the erasing direction of the writing surface 101 (arrow direction in Fig. 1). It is to be made.

The driving motor 173 provides the power required for this horizontal driving.

In the embodiment of the present invention, a combination of the rack gear 171 and the pinion gear 174 is commonly used as the driving guide unit 170, but the present invention is not limited thereto, and the roller chain is positioned at the position of the rack gear. Even if the chain sprocket is installed in the position of the gear will fall within the scope of the present invention.

In other words, the fixed portion of the driving guide means is formed on the blackboard main body 100 which always maintains a floating state, and the traveling portions may be disposed on the traveling casing 130 side that travels a predetermined erasing section.

Both ends of the board protection frame 105 and both sides of the traveling casing 130 corresponding thereto are provided with position sensing means 160 for limiting the reciprocating range of the traveling casing 130.

The position detecting means 160 includes a contact member 162 provided on the board protection frame 105 and a limit switch 161 provided on the traveling casing 130.

The driving casing 130 wraps and protects a brush, a wiper member, a variable contact means and all other cleaning and erasing devices from the outside for cleaning and erasing the chalk layer attached to the writing surface 101 of the blackboard. It is essential that the traveling casing 130 be able to quietly operate the cleaning / erasing device of the substrate at one speed from one end to the other of the writing surface 101 at a constant speed.

In addition, the traveling casing 130 needs to be controlled by a predetermined position detecting means 160 so as not to leave the erase section of the blackboard while traveling horizontally from one end to the other end of the blackboard.

In the embodiment of the present invention, but the limit switch is adopted as the position detecting means 160, but is not necessarily limited thereto, and the reciprocating driving range of the casing is limited by using a proximity sensor or by attaching a timer to restrain the motor driving time. It may be limited.

1 to 8 show a first embodiment of the present invention.

The first embodiment sets the positions of the displacement start points A of the plurality of eccentric shafts 270 on the coordinates of different rotational trajectories so that the forward and backward distances of the pair of erasing apparatuses are uneven. 되도록) so that it is controlled so as to be exchanged by alternating one side with a contact and the other with a non-contact.

Fig. 3 is a plan view showing the inside of the casing of the erasing apparatus in the first embodiment.

A hatching symbol 130 denotes a running casing.

The traveling casing may be molded into an injection molded product made of synthetic resin, or may be formed by extruding it into a lightweight metal material such as aluminum.

It includes a substantially cylindrical brush 141 and a wiper member 142 is called a cleaning means (or erasing device), in this embodiment the cleaning means 140 is constrained by the block body 260.

As shown in FIG. 3, the block body 260 has left and right brushes 141L in which contact and non-contact are determined with respect to the writing surface 101 of the blackboard body 100 by the variable contact means 200 described later. , 141R, wiper members 142L, and 142R are formed with insertion grooves 261 and 262 which can be fitted to face the writing surface 101, respectively.

The insertion grooves 261 of the brushes 141L and 141R rotate the concentric circular arc slightly larger than the outer diameter of the brush to form an inner wall to form an inner wall, and open the front part thereof to open the front part. It is possible to erase the chalk layer while sliding contact with the writing surface 101 of the blackboard through the opening.

On both sides of the left and right brushes 141L and 141R, the wiper members 142L and 142R in the shape of a louver blade can be installed to face the writing surface 101. Will be formed.

The insertion groove 261 of the brush and the insertion groove 262 of the wiper member are formed in the up and down direction substantially similar to the length of the brush and the wiper member.

An arc-shaped brush insertion groove 261 in the block body 260 increases the cleaning effect by circulating the water when the brush 141L, 141R is washed and erased.

As described above, the block body 260 having the insertion grooves 261 and 262 of the brush and the wiper member formed at the distal end facing the writing surface of the blackboard controls the predetermined eccentric shaft as described above. As a result of this eccentricity, the board's writing advances and the elimination requirement is obtained.

The above-mentioned erasure requirements are first outlined to provide a general understanding of this embodiment.

As shown in FIG. 3, left and right eccentric shafts 270L and 270R having predetermined eccentric distances are fitted to both rear sides of the block body 260, and the block body is displaced according to the displacement of the eccentric rotation of the eccentric shaft. 260 is moved forward and backward, and the left and right core axles 270L and 270R are fitted to the variable plate 190 supporting the axis of the brush 141 as shown in FIG. As the restraint block 260 moves forward and backward, the variable plate 190 also moves forward and backward in the same manner so that the brush 141 can move forward and backward with respect to the writing surface 101.

The eccentric shafts 270L and 270R are in three contact or non-contact states by a sensor dog 282 shown in FIG. 3 and a proximity sensor 283 that detects the sensor dog 282. It will be controlled, which will be described in detail again with reference to FIGS.

As described above, the erasing method and the apparatus according to the present invention are in the form that the brush is first cleaned and erased on the writing surface 101 and then wipes off the moisture on the writing surface while the wiper follows.

In addition, in order to continue the erasing operation while the brush and the wiper member reciprocate, the brush and the wiper member must be restored to the preconditions necessary for the above erasing operation even if the brush and the wiper member are not all together.

In other words, when the erasing operation of the path is completed and the sequence of erasing operation is changed in the driving direction of the return path, the contact portion which comes into close contact with the writing surface of the board in the path is left brush-right ( Assuming that it is a wiper member, it is necessary to change the positional relationship to the left wiper member-right brush in the return path.

In this embodiment, as shown in Fig. 3 or Figs. 5A to 5C, the brush and the wiper member are defined as a pair of erasing devices (cleaning means), and the positions as described above are symmetrically arranged on the left and right sides of the block body 260. We solved the problem of transforming relationships.

Means for solving such a positional relationship are defined as variable contact means 200 in the present invention.

First, the driving mechanism of the variable contact means 200 will be described with reference to FIG. 4.

As shown in FIG. 4, the gear group included in the variable contact means 200 is easily considered to distinguish it from other gears by dot-dotting for convenience. Such a display method is equally applicable to other embodiments. We do with key.

Power of the retraction motor 214 is transmitted stepwise in the order of the standby gear 231 → the upper pinion gear 232 → the lower pinion gear 233 → the intermediate gear 234 → the pinion gear 235.

The upper pinion gear 232 and the lower pinion gear 233 are formed in one body, and the shape of the lower pinion gear 233 and the other pinion gear 235 having the intermediate gear 234 interposed therebetween. The direction of rotation is the same.

On the edge of the upper pinion gear 232, a sensor dock 282 is supported by the bracket 281, and on the plate 210 that supports the retreating motor 214, the sensor dock 282 detects the position of the sensor dock 282. Three proximity sensors 283 are supported on the bracket.

The three proximity sensors are very important for determining the contact state between the brush and the wiper member installed in the insertion grooves 261 and 262 of the block body 260 with respect to the writing surface 101 of the board. It will play a role. In the clockwise direction in FIG. 3, when the first sensor 283 detects the sensor dock 282, it is in close contact with the second sensor 283, and when the second sensor 283 detects the sensor dock 282. The neutral state and when the third sensor 283 detects the sensor dock 282 is in a left close state.

Here, the right adhesion state means that the cleaning means 140R located on the right side of the pair of cleaning means (collectively, including the brush and the wiper member) is symmetrical with each other and adheres deeply to the writing surface. It means a state in which the preparation for traveling toward () is completed, wherein the cleaning means 140L on the left side is slightly in contact with the writing surface 101 (brush) so as not to interfere with the horizontal running of the cleaning means. It becomes a non-contact (wiper member) state. The close contact state is a concept opposite to the right close state.

In this embodiment, it is shown in the drawings that the brush of the non-contact portion is in contact with the writing surface 101 in a close contact state or a left close contact state, but this is not in a state of being in close contact with the writing surface and is likely to touch. It can be seen as a proximity state.

In this embodiment, the side of performing the erase operation in close contact with the writing surface in the erasing apparatus is called a contact portion, and the opposite side must be understood as a non-contact portion.

In the neutral state, the brushes 141L, 141R and the wiper members 142L, 142R all maintain a non-contact state separated from the writing surface of the board by a predetermined distance.

The operation principle of the neutral state, the right close state, and the left close state will be described with reference to FIGS. 5A to 5C.

5A shows the neutral state of this embodiment.

In the neutral state, the left and right eccentric shafts 270L and 270R are symmetrical with the left axial shaft 270L and the post shaft 270R as shown in the figure. In this case, the eccentric shaft rotates in the clockwise direction, and in the case of close contact, that is, the left and right eccentric shafts 270L, 270R rotate in the counterclockwise direction.

In FIG. 5A, reference numeral A denotes a starting point of displacement of the eccentric shaft in a neutral state, and C denotes a maximum displacement point of the eccentric shaft 270.

Therefore, the amount of displacement gradually increases from A to C and gradually decreases from C to A.

In the neutral state, the left and right brushes 141L and 141R are all separated from the writing surface 101 by a predetermined interval t, and the wiper member is spaced apart from the writing surface 101 by a predetermined interval T. have.

Here, the inequality T> t holds.

Fig. 5 (b) shows a close contact state, that is, a leftward state in which the cleaning means will travel toward the left side of the board.

As compared with FIG. 5A, it can be seen that the eccentric shaft 270R is rotated by a predetermined angle in the counterclockwise direction.

However, one very important fact here is that the left and right two eccentric shafts 270L and 270R are rotated by the same angle, but the brush 141R on the right side compared to the brush 141L and the wiper member 142L on the left side. ) And the wiper member 141R are far more closely adhering toward the writing surface 101.

In other words, the inequality of t ₁ > t ₂ holds, and the wiper member disposed on the left side maintains the non-contact state with respect to the writing surface 101 as in the neutral state.

The reason for this is explained with reference to Fig. 5 (a) which shows the neutral state before the eccentric shaft is displaced.

The displacement start point A of the left central shaft 270L shown on the left side of FIG. 5A is on the right side of the axis center line Y, and the displacement start point A of the post core shaft 270R on the right side of the drawing is the axis center line. It is on the left side of (Y).

That is, since the position of the displacement start point A of the left axial axis 270L and the post axial axis 270R is located on different coordinates of the rotational trajectory, the front and rear retreat distances of both sides are inevitably different.

Therefore, when the eccentric shafts 270L and 270R rotate counterclockwise simultaneously to switch to the right close state as shown in FIG. 5B, the post core shaft 270R is connected to the left central shaft 270L even if both are rotated by the same angle. In comparison, since the displacement start point A is located relatively forward, the displacement end point ends at a larger side, resulting in more displacement.

Due to this principle, the right side of the block body 260 is moved forward with respect to the writing surface 101 more than the left side, and the right wiper member 142R fixedly installed at the tip of the block body is deeply intimately adhered to the left side. The wiper member 142L moves forward only a little to become in a non-contact state with respect to the writing surface 101.

As described above, since the brush is axially supported by the variable plate 190 and moves in the same manner as the movement of the block body 260, the brush 141R on the right side moves forward with respect to the writing surface 101. On the other hand, the brush 141L on the left side is only slightly advanced to lightly contact the writing surface 101.

As can be seen from the contact-non-contact relationship of the cleaning means 140, in the case of the brush, the side that does not perform the erasing action may contact the writing surface of the board, but in the case of the wiper member, It can be seen that only the wiper member of c) must be in intimate contact with the writing surface 101, and the wiper member of the non-erasing side must remain in contact with the writing surface 101.

Fig. 5C shows a left-adherent state, that is, a dusty state in which the cleaning means will travel toward the right side of the board.

This left close contact is made under the same concept as the right close contact described above, and only the direction of rotation of the eccentric shaft is reversed.

The basic starting step of the erasing apparatus (cleaning means) of the present invention is a neutral state.

Therefore, as soon as the washing and erasing action is completed in tight contact state, all moving sequences return to the neutral position.

For this reason, at the end of the close contact state, the position conversion is made to the left close state through the neutral state.

In the left close contact state of FIG. 5C, the opposite of the right close contact state of FIG. 5B may be considered.

That is, the eccentric shafts 270L and 270R rotate in the clockwise direction.

As shown in FIG. 5A, since the displacement start point A of the left axial shaft 270L is positioned before the displacement start point A of the zip core 270R, the displacement end point C is closer to the displacement end point C. It becomes relatively larger than the displacement amount of.

As a result, the brush 141L and the wiper member 142L on the left side are completely in contact with the writing surface 101 through the same process as in the right contact state.

The brush 141R on the right side is in light contact with the writing surface 101, and the wiper member 142R on the right is in a non-contact state so that the eraser on the left side does not interfere with the driving to the right.

Reference numeral 264 denotes a guide hole for compensating for the deviation of the movement of the eccentric shaft.

As described above, the guide hole 264 compensates for the deviation caused by the rotational direction of the eccentric shaft because the positions of the displacement start points A of the left and right eccentric shafts 270L and 270R are different from each other. .

The guide hole 264 is a shaft hole that restrains only the left eccentric shaft 270L as shown in FIGS. 5A to 5C. Accordingly, the left eccentric shaft 270L is free in left and right directions and constrained in the front and rear directions when viewed in the drawing. The post shaft 270R is provided in the shaft hole 271 of the block body 260 via the bearing 251. As shown in FIG.

So far, the cleaning means (clearing device) consisting of the brush and the wiper member has been described how to make contact-non-contact while moving forward and backward with respect to the writing surface 101.

Next, two brushes 141L and 141R provide the power required to perform the erasing action while directly in sliding contact with the writing surface. The brush drive means 180 for transmitting will be described.

In FIG. 6, the gear arrangement group located at the upper side of the drawing belongs to the brush driving means 180, and the gear arrangement group at the bottom of the drawing belongs to the variable contact means 200 described above.

The brush driving means 180 will be described with reference to FIG. 7.

The power of the brush drive motor 181 having a predetermined reduction gear is a standby gear 182 → pinion gear 183 → upper pinion gear 184 → lower pinion gear 185 → middle gear 186 → pinion gear. It passes to the left and right brushes 141L and 141R in the order of 187.

Since the upper pinion gear 184 and the lower pinion gear 185 are coaxially installed and have an intermediate gear 186 interposed therebetween, the rotation direction of the lower pinion gear 185 and the other pinion gear 187 is different. Is the same.

Accordingly, the left brush 141L provided coaxially with the lower pinion gear 185 and the right brush 141R provided coaxially with the pinion gear 187 rotate in the same direction.

The brush driving means 180 is supported by the variable plate 190.

The brush washes and cleans the chalk layer recorded on the writing surface 101 by supplying the cleaning liquid between the brushes 141L and 141R and the writing surface adjacent to the brush by the predetermined cleaning liquid supplying means 150. Can be erased.

The cleaning solution supply means 150 is detachably installed on the traveling casing 130 toward the lower end of the traveling casing 130 to move horizontally along with the horizontal traveling of the traveling casing 130.

The cleaning liquid supply means 150 includes a cleaning liquid tank 159 for storing a cleaning liquid such as water or surfactant water,

A submersible pump 156 for supplying a cleaning liquid to be attached to the cleaning liquid tank 159,

And a feeding pipe 152 for delivering the cleaning liquid pumped from the submersible pump 156 to the upper portion.

In the cleaning liquid tank 159, a filter 151 for filtering the contaminant that has been washed out and removed from the chalk layer is detachably installed.

The configuration of the cleaning solution supply means 150 has a basic purpose to reuse while circulating the cleaning solution, and thus it is possible to solve the inconvenience caused by replacing the cleaning solution only by supplementing the natural loss.

The washing liquid used for washing and erasing of the present invention includes all liquids having a washing function including water, but it is particularly preferable to use surfactant water having a relatively high washing power and fast drying.

The brush of the present invention has been improved so as to self-clean the contaminant cleaning liquid penetrating the brush while having the highest elimination effect through numerous experiments.

In other words, when the length of the brush is shortened to less than about 10mm and the number of rotations is about 80 to 120r.pm, it is possible to effectively erase the chalk layer by the brush and to generate the brush. It has been found experimentally that the contaminant cleansing liquid contained in the brush has a purifying function by which it comes out by the centrifugal force. More preferably, the rotation speed of the brush is set to about 100 r.p.m.

On the other hand, the wiper members 142L and 142R have only the front end of the rubber material made of the blade having a thin blade shape in close contact with the insertion groove 262 of the block body 260. The board is flipped on the writing surface 101 of the board while sweeping over the residual cleaning liquid.

The brushes 141L, 141R and the wiper members 142L, 142R have no significant difference whether the number of installations is singular or plural as in this embodiment, and is inherent in a predetermined block body. If it is controlled by means of), anything will be said to fall within the scope of the present invention.

8A to 8C illustrate modified examples of the brush and the wiper.

Reference numerals 310L and 310R shown in FIG. 1 or FIG. 3 denote fan heaters.

As shown in the figure, the wiper member 142 may be insulated from both sides of the block body 260 or may be arranged in a double row.

However, by installing the wiper members symmetrically on both sides of the brush 141, the contact portion of the wiper member becomes the erased side in accordance with the change of the running route which alternates the road and the return path. You just need to configure it to be non-erasing.

Here, the brush 141 may be operated in a plural configuration as shown in FIG. 8A to be divided into contact parts and non-contact parts, or to perform an erase operation while maintaining contact with the writing surface at all times without distinguishing the contact parts and non-contact parts as shown in FIGS. 8B to 8C. It may be formed.

The fan heater 310R on the right side is operated when the travel casing 130 travels to the left side, and the fan heater 310L on the left side is operated when the travel casing 130 travels to the right side, while the writing surface cut out by the wiper member 142L. It is configured to send warm warm air to (101) and to dry it. In particular, high operating effects can be expected in cold winter seasons and in rainy weather with high humidity.

In the present invention, it is considered that the elimination device is reciprocated to the left and right, and each switch box (not shown) is provided on the left and right sides of the traveling casing 130, respectively.

The switch box is provided with a power switch and an operating switch, respectively. The stop of the traveling casing is automatically controlled by a predetermined position detecting means 160 such as a limit switch as described above.

From the second embodiment, the description of other components will be omitted, and only the variable contact means 200 will be described.

This is because the remaining portions except for the variable contact means do not differ much from the configuration of the first embodiment.

In addition, the same code | symbol is attached | subjected about the part same or similar to 1st Embodiment, and it demonstrates.

9 to 10 show a second embodiment of the present invention.

This embodiment uses a multi-stage split motor such as a stepping motor or an oscillation motor (hereinafter referred to as OSC motor), and uses a top and bottom deck. By supporting the brush and the wiper member in the forward and reverse rotation of the deck (deck) at a constant angle is a method of contacting or non-contact with the writing surface 101 of the board.

9A-9B are schematic plan views showing the variable contact means 200 of this embodiment.

In the drawing, the part indicated by the dashed-dotted line is the running casing 130.

FIG. 9A shows a right-side state in which the brush 141L on the left side and the wiper member 142L run toward the right side of the board, and FIG. 9B shows a left-side state.

The brushes 141L, 141R and the wiper members 142L, 142R are all installed on the upper deck 264 and the lower deck 265, among which the brush 141L, 141R is rotatably supported by the shaft.

The upper deck 264 and the lower deck 265 are integrally connected.

The driving mechanism of the variable contact means 200 of this embodiment will be described in detail.

The standby gear 215 is fixedly installed in the retraction motor 214 configured to divide the rotation of the motor shaft in multiple stages and control the predetermined rotation angle, and the standby gear 231 is attached to the bottom of the lower deck 265. Meshes with the pinion gear 232.

Power is transmitted to the upper deck 264 and the lower deck 265 through the pinion gear 232 and the shaft 217 to control the rotation of both 264 and 265.

That is, when the retraction motor 214 rotates in the counterclockwise direction as shown in FIG. 9A, the pinion gear 216 and the shaft bar 217 connected thereto rotate in the clockwise direction so that the upper deck 264 and the lower deck 265 are rotated. Close contact.

Accordingly, the brush 141L and the wiper member 142L are in close contact with the writing surface 101, and the right side retreats to the opposite side of the writing surface 101 by counteracting the brush 141R and the wiper member 142R. Is sufficiently separated from the writing surface 101.

FIG. 9B shows a close contact with FIG. 9A, and the upper and lower decks 264 and the lower deck 265 move to the right as the forward and backward motors 214 rotate clockwise, so that the brush 141R and the wiper member (] 42R) comes into close contact with the writing surface, and the driving mechanism is the same as in the case of FIG. 9A described above.

On the other hand, in addition to the travel guide means 170 which transmits the power required to move the travel casing 130 to the left and right horizontally made of a combination of gears inserted into the guide groove 173 in order to promote the quietness of the movement, the horizontal movement It is more preferable to provide the member 172.

The moving member 172 typically selects a rolling member such as a roller.

A third embodiment of the present invention is shown in Figures 11-12.

This embodiment is an embodiment incorporating the mute return administration of the present invention.

That is, the erasing device composed of the brush and the wiper member is configured to perform the cleaning and erasing operation only on the road and to return to the original position at a certain distance from the writing surface.

In this embodiment, as in the first embodiment, the brush 141 and the wiper member 142 are installed in one block body 260, and the block body 260 is supported on the variable plate 190 in the state. By moving the variable plate with respect to the writing surface 101, the method of making the brush 141 and the wiper member 142 contact-non-contact with the writing surface is applied.

In this embodiment, the variable contact means 200 will be described in detail.

Power generated through the retraction motor 214 is transmitted through the steps of the first timing pulley 237 → the first timing belt 139 → the second timing pulley 238.

The second timing pulley 238 is a two-stage winding electric pulley, wherein the first stage side of the pulley is an input side receiving power from the retraction motor 214, and the second stage side of the pulley is an output side transmitting the received power to the lower side. .

The upper plate 210 is fixed to the running casing 130.

As can be seen in FIG. 24, all the brush driving means 180 and the variable contact means 200 are supported by the upper plate 210 via the 0 support blocks 286 and 286.

Support shafts 289 and 286 are inserted into the support blocks 286 and 286 to move forward and backward.

Two second timing pulleys 238 are installed at both upper and lower sides, and a predetermined screw shaft 284 is extended and developed at one side of the second timing pulley 238 to be fitted to the screw block 285 and to the screw block 285. ) To retreat by screw feed.

The screw block 285 is fixed on the variable plate 190.

Therefore, as the screw block 285 moves, the variable plate 190 moves forward and backward in a linear motion with respect to the writing surface 101.

The variable plate 190 has a brush and a block body 260 that restrains the erasing device such as a wiper member is fixed, so that the erasing device contacts or separates from the writing surface 101 while coordinating with the advancing / removing motion of the variable plate 190. (離 間) is to be.

A plurality of guide grooves 288 are formed on the upper plate 210, and the guide rod 288 is fitted with a shaft bar 287 to guide the variable plate 190 to smoothly advance and retreat.

For reference, a power transmission system of the brush driving means 180 will be briefly described.

Power generated from the brush driving motor 181 is transmitted to the brush 141 through the third timing pulley 251 → the third timing belt 252 → the fourth timing pulley 253.

In the present invention, the third embodiment is mentioned as an example of the mute-free feedback stroke, but is not limited thereto.

For example, by installing a solenoid valve (hereinafter abbreviated as solenoid) at two places above and below the block body 260 or at one center of the above-described block body 260, the block body 260 is finished. May be removed from the writing surface 101 of the board.

Since the solenoid acts in a linear direction in the ON state due to the characteristic of operation, it is possible to retract the block body 260 from the writing surface 101. Therefore, the brushes 141L and 141R and the wiper member are restrained by the block body. 142L) and 142R can be easily separated from the writing surface to be isolated and returned to their original positions.

However, since the solenoid does not have an automatic return function, a separate return device such as a tension spring, a gas spring, or the like is attached to the block body 260 to bring the brush and the wiper member into close contact with the writing surface 101. Must be added.

In this embodiment, as the inventors have emphasized many times, the key element of the silent return stroke is that the brush and the wiper member which do not perform the erase operation are separated from the writing surface together.

In the first to third embodiments of the present invention as described above, the writing board 101 of the blackboard is mentioned as long as it is flat, but not necessarily limited thereto. If the writing board 101 is a curved body, the board protection frame ( The erasing device of the present invention can be applied only by a conventional design change such as driving guide means (rack gear, etc.) formed on the 105 or the moving member 172 to fit the curvature of the writing surface. It belongs to the scope of rights.

The present invention has the same effects as described in the following paragraphs.

(1) Since the erasing device reciprocates horizontally with respect to the writing surface of the planar board body, the erasing device is not interfered by the peripheral structure of the board body.

② Since the erasing device is not affected by the change of the erasing direction and creates the same erasing environment in any one-way or round-trip operation, the cleaning and erasing state on the board is always maintained uniformly. There is no concern at all.

(3) The arrangement of the pre-brush post-wiper member is always kept unchanged toward the erasing direction by controlling the erasing device by the variable contact means.

④ The brush and the wiper member are considered to be co-rotated together under the unified power transmission means, so the cleaning and erasing effect due to the merge control is large and the space utilization rate is high due to the technology composition.

(5) The same erasing effect can be obtained in either round trip or one way erasure.

Claims (7)

With respect to the chalk recording layer written on the writing surface 101 while the predetermined rotating brush and the erasing device including the wiper member travel in sliding state from one end to the other end of the blackboard while contacting the writing surface 101 of the blackboard. Always satisfies the cleaning and cleaning conditions of the pre-brush wiper member, which can be cleaned and erased in the roadway, and can be cleaned and removed in the same way as in the roadway. As the erasing direction changes from the back road to the back road, the combination of the pair of brush-wiper members arranged approximately symmetrically on both the left and right sides is moved forward and backward with respect to the writing surface 101. A method of erasing a water cleaning blackboard, wherein the contact portion is controlled to be converted into a non-contact portion and a non-contact portion, respectively, while advancing. With respect to the chalk recording layer written on the writing surface 101 while the predetermined rotating brush and the erasing device including the wiper member travel in sliding state from one end to the other end of the blackboard while contacting the writing surface 101 of the blackboard. The washing and erasing action of the pre-brush wiper member, which can be cleaned and erased in the roadway and can be performed under the same conditions as in the roadway, will always be satisfied. So that the brush is always arranged singularly to remain in contact with the writing surface 101, The wiper member is symmetrically arranged on both left and right sides of the brush, and the brush moves forward and backward with respect to the writing surface without changing the position as the erase direction changes from the road to the home. While the contact portion is controlled to be converted to the non-contact portion and the non-contact portion, respectively, the water cleaning blackboard erasing method. With respect to the chalk recording layer written on the writing surface 101 while the predetermined rotating brush and the erasing device including the wiper member travel in sliding state from one end to the other end of the blackboard while contacting the writing surface 101 of the blackboard. Washing and erasing is carried out in the back road, and in the return road, both the brush and the wiper member are retracted from the writing surface 101 by a predetermined interval so that they are controlled to return to their original positions in an isolated state. Method of erasing the water cleaning blackboard. A blackboard main body 100 in which a predetermined driving guide means 170 is formed along the erasing direction on a blackboard protection frame 105 supporting the outer surface of the writing surface; The chalk layer adhered to the writing surface 101 is supplied with the cleaning liquid from the predetermined cleaning liquid supply means 150 while slidingly rotating in a circumferential state with respect to the writing surface 101 of the floating blackboard body 100. Brush (141L), (141R) to wash and erase, Wiper members (142L) and (142R) for sweeping down and dropping the residual cleaning liquid buried on the writing surface 101 while always following the back of the brush, A wiper member (142L), (142R) for sweeping down the liquid, Positions of the brush and the wiper member to control the brushes 141L, 141R and the wiper members 142L, 142R to alternately contact and non-contact parts with respect to the writing surface of the blackboard main body 100. Water cleaning blackboard erasing apparatus, characterized in that consisting of a variable contact means for varying. The apparatus of claim 4, wherein the variable contact means comprises a stepping motor. 5. The apparatus of claim 4, wherein the variable contact means comprises a 0. S. C motor. 5. The apparatus of claim 4, wherein the variable contact means comprises a solenoid.