KR200163257Y1 - Water cleaning chalk board - Google Patents

Abstract

The present invention relates to a water-cleaning blackboard for cleaning and erasing and drying chalk-based contents recorded on a board writing surface of a blackboard using a predetermined cleaning liquid.

The idea of the most important design of the present invention is that the elimination device, which is made to reciprocate from one end of the board to the other end of the board, has completed one erasing operation along the writing surface of the board at the royal road, and then returns home again. ) Is to implement a reciprocating erasing system that can perform an erasing operation under the same conditions as a road.

The present invention to achieve the above object,

A blackboard body 100 including a rectangular writing member 110 and a blackboard frame body 120 which surrounds and supports a peripheral edge of the writing member;

An outer casing 120 having an opening toward the writing member 110 and mounted with the erasing device 200 and coupled to the front of the blackboard body to reciprocate from side to side;

Erase members 230L and 230R which rotate while slidingly contacting the writing member 110 to erase writing contents on the writing member 110, and writing contents peeled off on the writing member upon erasing by the left and right erasing members. Washing liquid supply means (250) for supplying a cleaning liquid for washing down the liquid, a left and right wiper member (240L) (240R) for sliding contact with the writing member (110) to remove the cleaning liquid remaining on the writing member, and the erasing. An erasing apparatus 200 including variable contact means 220 for selectively contacting or non-contacting the members 230L and 230R with one side of the left and right wiper members with respect to the writing member 110,

Forced drying means 260 is installed adjacent to one side of the wiper member, and is adapted to convert the wind direction while rotating in conjunction with the eccentric rotation of the erasing member,

The erasing device casing 210, the erasing device 200, and the control unit 270 for controlling the operation of the forced drying means 260.

Description

Water cleaning chalk board}

The present invention relates to a water cleaning blackboard.

In more detail, the chalk recording layer described in various forms such as letters, numbers, figures, symbols, etc. is written on the writing board (recording surface) of the Chalk Board. It relates to a water cleaning blackboard to be erased with a cleaning liquid such as.

The erasing method and the erasing device of the present invention will work by limiting the chalk particles to the chalk board to be separated from the fine concavo-convex surface. In the case of the white board, since the writing surface is smooth and the writing medium is a volatile ink, it is easy to erase the written records simply by rubbing in a conventional manner. There is no need.

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 the chalk particles that are written with chalk on the surface 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.

The present invention is provided to solve such a conventional drawback, the contents written in chalk on the writing member of the blackboard body is arranged to be automatically erasable by the erasing device for reciprocating to the left and right in front of the blackboard body. It is an object of the present invention to completely clean, erase, and dry the chalk letters written on a writing member not only when driving the road, but also when driving back.

Water cleaning blackboard of the present invention to achieve this purpose,

A chalkboard body 100 including a substantially rectangular writing member 110 and a blackboard frame body 120 that surrounds and supports a peripheral edge of the writing member;

An outer casing 210 having an opening toward the writing member 110 and coupled to the front of the blackboard body to reciprocate from side to side;

Erase members 230L and 230R which rotate while slidingly contacting the writing member 110 to erase writing contents on the writing member 110, and writing contents peeled off on the writing member upon erasing by the left and right erasing members. Washing liquid supply means (250) for supplying a cleaning liquid for washing down the liquid, a left and right wiper member (240L) (240R) for sliding contact with the writing member (110) to remove the cleaning liquid remaining on the writing member, and the erasing. The erasing apparatus 200 comprising variable contact means 220 for selectively contacting or non-contacting the members 230L and 230R and one side of the left and right wiper members with respect to the writing member 110, and the left and right erasing apparatus. Forced drying means 260, the erasing device casing 210, the erasing device 200, and forced drying to be installed adjacent to one side of the member to change the wind direction while rotating in conjunction with the rotation of the erasing member It consists of a control unit 270 for controlling the operation of the stage 260.

According to the present invention, the left erasing group consisting of the left erasing member and the left wiper member with respect to the writing member, according to the traveling direction of the erasing device, is used to erase the contents described on the writing member,

It is characterized by selectively contacting any one of the right erasing group consisting of the right erasing member and the right wiper member.

In this way, when the contents of the writing on the writing member are erased, the wiper member can be positioned behind the erasing member by the variable contact means toward the running direction of the erasing device with respect to the writing member. It is possible to erase the contents of the chalk on the writing surface even when driving back home.

1 to 8 is a view showing an embodiment of the present invention

1 is a front view showing the schematic configuration of the blackboard main body and the erasing device.

Fig. 2 is a longitudinal sectional view of the main parts of the contact variable stage and the travel guide means of the erasing device as seen from the right side;

3 is a cross-sectional view showing the internal configuration of the erasing device.

Fig. 4 is a longitudinal sectional view of the main parts of the contact variable stage and the forced drying means in the erasing apparatus as viewed from the front;

5 is an explanatory diagram showing an operation principle of a contact variable stage in an erasing device;

Fig. 6 is a longitudinal sectional view of the main parts of the contact variable stage and the left and right side erasing members in the erasing apparatus as viewed from the front;

7 is an explanatory diagram showing an operation panel and a control unit for controlling an erase operation.

8 is an explanatory view showing a modification of the erasing member and the wiper member in the erasing device;

Explanation of symbols for the main parts of the drawings

100-Blackboard main body 110-Writing member

120-Chalkboard Frame 210-Outer Casing

211a-Upper Support Frame 211b-Lower Support Frame

221L-Left Axle 221R-Postal Axle

222a-Upper Variable Frame 222b-Lower Variable Frame

225-Eccentric Shaft Carver

220-Variable contact means 230L-Left eraser

230R-right wiper member 240L-left wiper member

240R-Right wiper member 270-Control unit

L-Left Elimination Group R-Right Elimination Group

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 to 8 show an embodiment of the cleaning blackboard of the present invention.

The cleaning blackboard is largely divided into a blackboard body 100 and an erasing device 200.

As shown in FIG. 1, the blackboard main body 100 includes a rectangular writing member 110 made of a steel member or a synthetic resin sheet material, and the writing member 110 of the writing member 110 to maintain a flat vertical surface. Consists of a blackboard frame body 120 wrapped around the edge.

In this embodiment, the driving guide unit 130 for reciprocating the horizontal direction of the erasing device 200 to be described later with respect to the blackboard main body 100 and the erasing end switch of the erasing device 200 is sensed. In other words, it is provided with a position detecting means 140 for accurately positioning the erasing device 200 to either side of the left and right ends of the writing member 110. As shown in FIG. 2, the travel guide means 130 includes a rack 131a, a guide rod 132a, which are integrally installed on the upper frame of the blackboard frame body 120 over the entire length thereof, and Bearings installed on the upper support frame 211a of the outer casing 210 of the erasing device 200 and slidingly mounted on the guide rod 132a and the pinion 131b geared to the rack 131a. 132b.

In addition, the position detecting means 140, as shown in Figure 1, the contact members 141a which are respectively provided at both ends of the upper frame of the blackboard frame body 120, and on both upper outer surfaces of the outer casing 210 Each of them is provided as a limit switch 141b for generating an electrical signal when contacted with the contact member 141a.

When the user wants to erase the contents after writing the chalk writing on the surface of the writing member 110, pressing any one of the left and right erasing switches (S2) (S3) to be described later, driving from the controller 270 The driving motor M1 is driven by the signal to rotate the pinion 131b forward and backward so that the erasing device 200 reciprocates in the horizontal direction of the chalkboard body 100. (See FIG. 2, FIG. 6, FIG. 7)

After that, when the limit switch 141b contacts the contact member 141a, the limit switch 141b sends a detection signal to the control unit 270, and the control unit 270 drives the drive according to the detection signal. By stopping the driving of the motor M1, the erasing device 200 is stopped.

As the position detecting means 140, an optical sensor, a micro switch, a proximity sensor, or the like may be used in addition to the limit switch 141b.

Next, a description will be given of the erasing device 200 for erasing the contents written in chalk on the surface of the writing member (110).

As shown in FIGS. 1 and 3, the erasing device 200 includes an outer casing 210, variable contact means 220, an erasing member 230, a wiper member 240, a cleaning liquid supply means 250, And a forced drying means 260 and a control unit 270.

The outer casing 210 has an approximately rectangular shape having an opening 210a toward the writing member 110, and has an inner and right eccentric shaft 221L and 221R in the variable contact means 220 therein. And upper and lower support frames 211a and 211b for rotatably supporting the rotating shaft 261 in the forced drying means 260.

On the upper side of the upper support frame 211a, a drive motor M2 for forward and reverse rotation of the left and right eccentric shafts 221L and 221R and a gear group for transmitting power generated from the drive motor M2 are installed. In the lower side of the lower support frame 211b, a cleaning solution tank 253 in the cleaning solution supply means 250 described later is detachably provided.

The variable contact means 220 is formed of a left erasing member 230L and a left wiper member 240L which will be described later with respect to the writing member 110 when erasing the chalk-based content on the writing member 110. The left side erasing group L and the right side erasing group 230R and the right side wiping group R formed of the right wiper member 240R are selectively contacted in accordance with the traveling direction.

2 and 4, the variable contact means 220 includes left and right eccentric shafts 221L and 221R rotatably arranged between upper and lower support frames 211a and 211b of the outer casing 210. ), An elliptical through hole 223L through which the left axle shaft 221L penetrates, and a circular through hole 223R through which a post core shaft 221R penetrates are formed at the rear, and the left and right side erasing members 230L and 230R are formed. Eccentrically enclosed the left and right eccentric shafts (221L) and (221R) in a vertical direction between the upper and lower sides of the deformed frame (222a) (222b) and the upper and lower parts (222a, 222b). The shaft cover portion 225 and the upper and lower portions are formed in the vertical direction between the vertical frame (222a, 222b) is composed of a substantially ω-shaped erasing member cover portion 226 surrounding the left and right side erasing members (230L, 230R) It is.

In addition, the wiper, which will be described later, is formed on both front end portions 226a of the erasing member cover portion 226 and protrudes outward from the outer surfaces of the front end portions 226a to the writing member 110 side. The protrusions 227 are formed to protrude from the insertion grooves 227b into which the members 240 are inserted to cover the entire length of the erasing member carver 226 in the vertical direction.

In addition, the space between the rear surface 226c of the erasing member cover portion 226 and the front surface 225a of the eccentric shaft cover portion 225 is a blow passage 228 of the forced drying means 260 which will be described later. It is used as).

The erasing member 230 is to erase the chalk-based content on the writing member 110 while rotating in sliding contact with the writing member 110,

The erasing member 230 is formed of a roll-shaped support shaft 231 and an outer side of the support shaft 231 and slide-contacts the writing member 110 to erase the chalk-based contents on its surface. It is composed of a brush 232, and the upper and lower parts are rotatably arranged between the side frames 222a and 222b, and are arranged in a substantially ω-shaped recess 226b formed as the erasing member cover part 226. It is.

The wiper member 240 reliably removes the remaining cleaning liquid from the cleaning liquid supplied from the cleaning liquid supply means 250 to be described later while being in direct sliding contact with the writing member 110 and remaining on the surface of the writing member.

The wiper member 240 is made of a wedge-shaped rubber material and includes a plurality of insertion grooves 227b formed in the front surface 227a of the protrusion 227 in the eraser member cover 226. It is installed in the insert.

The wiper member 240 is not only always wet with the cleaning liquid, but also requires sufficient abrasion resistance because it travels in close contact with the writing member.

Therefore, it is preferable to form a coating layer with a synthetic resin polymer such as polyurethane after introducing and halogenating a halogen element on the surface of the wiper member made of a rubber material, in particular, the surface of the tip portion in direct contact with the writing member.

Next, the operation principle of the variable contact means 220 will be described with reference to FIG.

In Fig. 5, reference numeral L0 denotes a rotational center point of the left eccentric shaft 221L, reference numeral LA denotes a displacement starting point of the left eccentric shaft 221L such that the eccentric distance becomes zero, and reference numeral LA 'denotes a displacement starting point LA. Displacement end point in the clockwise direction of, and LA 'indicates the displacement end point in the counterclockwise direction of the displacement start point LA, respectively.

Reference numeral R0 denotes the rotational center point of the post core axis 221R, reference numeral RA denotes the displacement start point of the post core axis 221R, in which the eccentricity is zero, and reference numeral RA 'denotes the displacement start point of the displacement start point RA in the clockwise direction. , RA 'denotes the displacement end point in the counterclockwise direction of the displacement start point RA, respectively.

Reference numeral X is a horizontal line parallel to the writing member 110 by connecting the rotation center point L0 and the rotation center point R0, and reference numeral LY is a vertical line perpendicular to the horizontal line X through the rotation center point L0, and reference numeral RY is a rotation center point. Each vertical line perpendicular to the horizontal line X is represented through R0.

FIG. 5A shows a left erasing group L composed of a left erasing member 230L and a left wiper member 240L, and a right erasing group R consisting of a right erasing member 230R and a right wiper member 240R. ) Shows a neutral state not to contact the writing member 110 together.

In this neutral state, as shown in Fig. 5 (a), the displacement start point LA of the left eccentric shaft 221L is about the angle θ in the clockwise direction with respect to the vertical line LY (in this embodiment, about 16 degrees) in the rotated position, and the displacement start point LA of the post-shaft axis 221R is set to a position rotated by an angle θ (about 16 degrees in this embodiment) counterclockwise with respect to the vertical line RY. do.

In the neutral state, the left and right erasing members 230L and 230R are separated from the writing member 110 by a predetermined distance Lt and Rt (Lt = Rt), and the left and right wiper members 240L and 240R are separated from each other. ) Is also isolated from the writing member 110 by a predetermined interval LT and RT (LT = RT).

The relationship between the interval LT (RT) and the interval Lt (Rt) is set such that "LT (RT) = 2 · Lt (Rt)".

The reason is that, in the case of a fibrous brush, the rest of the hair except for the hair roots is almost turned to the side when the writing member 110 is in contact with the writing member. Therefore, the writing member should be closer to the writing member 110 than the wiper member. This is because the desired close-up elimination effect can be achieved with respect to (110).

FIG. 5 (b) shows an operating state in the case of erasing the contents written in chalk on the writing member while driving the erasing device 200 from the left end of the writing member 110 to the right end.

That is, the left erasing group L made of the left erasing member 230L and the left wiper member 240L is in contact with the writing member 110.

In the above neutral state, when the driving motor M2 is rotated forward, the gear 221b built into the post shaft 221R via the gear 221a rotates in the clockwise direction, and the gear 221b and The gear 221d, which is installed on the left center shaft 221L, rotates in the clockwise direction via the interlocking intermediate gear 221c. (See FIG. 4).

Therefore, the left central shaft 221L rotates in the clockwise direction from the displacement start point LA shown in FIG. 5 (a) to the displacement end point LA 'shown in FIG. 5 (b) (in this embodiment, 90 degrees), the left erasing group L composed of the left erasing member 230L and the left wiper member 240L is advanced by the eccentric distance Ld max of the left eccentric shaft 221L. Ld max) and the relationship between the said space | interval Lt are "2 * Lt < Ld max < 3 · Lt ″, so that the writing member 110 comes into close contact with the writing member 110.

At the same time, the postal shaft 221R rotates in the clockwise direction from the displacement start point RA shown in FIG. 5 (a) to the displacement end point RA 'shown in FIG. 90 degrees), the right side erasing group 230R and the right side wiping group R made up of the right wiper member R also move forward by the eccentric distance Rd min of the post core axle 221R. min) and the relationship between the interval Rt are “Rd min Rt " so as to be in contact with the writing member 110.

When the relationship between the eccentric distance Rd min and the distance Rt is "Rd min = Rt", the left eliminating member 230L and the right eliminating member 230R are connected to the writing member 110. Although the erasing effect can be maximized by contacting, in this embodiment, for convenience of explanation, the right erasing group R consisting of the right erasing member 230R and the right wiper member 240R does not contact the writing member 110. Decide

FIG. 5C shows an operating state when the erasing device 200 is driven from the right end of the writing member 110 to the left end to erase the contents written in chalk on the surface of the writing member.

That is, it shows an operating state in which the right erasing group R formed of the right erasing member 230R and the right wiper member 240R contacts the writing member 110.

When the driving motor M2 is reversely rotated in the neutral state, the gear 221b which is installed on the post shaft 221R via the gear 221a rotates counterclockwise and meshes with the gear 221b. The gear 221d, which is installed on the left axial shaft 221L via the interposed middle gear 221c, also rotates counterclockwise.

Accordingly, the post shaft 221R rotates counterclockwise from the displacement start point RA shown in FIG. 5 (a) to the displacement end point RA 'shown in FIG. 5 (b) (about 90 in this embodiment). FIG. 7), the right side erasing group R, which is composed of the right side erasing member 230R and the right side wiper member 240R, is advanced by the eccentric distance Rd max of the post core axis 221R, and thus the eccentric distance Ld max. And the relationship between the interval Lt are " 2 Lt < Ld max < 3 · Lt ", so that the writing member 110 comes into contact with the writing member 110.

At the same time, the left eccentric shaft 221L rotates counterclockwise from the displacement start point LA shown in FIG. 5 (a) to the displacement end point LA ′ shown in FIG. 90 degrees), the left erasing group L consisting of the left erasing member 230L and the left wiper member 240L is also advanced by the eccentric distance Ld min of the left eccentric shaft 221L, but this eccentric distance Ld min ) And the interval Lt are defined as "Ld min Lt ”, so that the writing member 110 is not in contact with the writing member 110.

Thus, according to the variable contact means 220, according to the desired driving direction, the left erasing group (L), the right erasing group consisting of the left erasing member 230L and the left wiper member 240L with respect to the writing member 110 It is possible to selectively contact either one of the member 230R and the right wiping group R formed of the right wiper member 240R.

In addition, such a neutral state and the contact state of the left and right side clearing groups L and R are fixedly installed on the gear 221b built in the post shaft 221R as shown in FIGS. 3 and 4. The control unit 270 controls the detection signal from the proximity sensor 221f for detecting the moving object 221e.

However, in the upper and lower variable frames 222a and 222b, as shown in FIGS. 2 and 5, the reason why the through hole 223L through which the left eccentric shaft 221L penetrates into an elliptical shape is the left eccentric shaft 221L. This is to compensate for the deviation occurring when the 221R is rotated.

The cleaning liquid supplying means 250 supplies the cleaning liquid to the erasing member 230 to wash away the contents of the chalk substrate peeled off from the surface of the writing member 110 when the cleaning member supplying means 250 erases the eraser 230. Done.

As shown in FIG. 1, the cleaning liquid supplying means 250 includes a cleaning liquid pump 251 and a water supply pipe 252 for delivering the cleaning liquid sucked by the cleaning liquid pump 251 to the upper side of the elimination member 230. And a cleaning liquid tank 253 for storing the cleaning liquid injected from the water supply pipe 252.

In addition, the cleaning liquid tank 253 is detachably installed on the lower side of the lower support frame 211b of the outer casing 210, and therein, together with the chalk powder peeled off from the writing member 110, the cleaning liquid tank 253 is dropped. A filter 254 for filtering the cleaning liquid to be added is detachably installed.

The forced drying means 260 does not operate under indoor conditions in which the residual cleaning liquid can be sufficiently removed by the wiper member 240 alone, and selectively in the case where the drying speed is poor because the indoor humidity is higher than necessary or the indoor temperature is low. In this embodiment, a fan heater in which a fan (FAN) and a halogen lamp are combined is adopted as a forced drying means in this embodiment.

The fan heater as the forced drying means 260 is a gear 261a rotatably installed between the upper and lower support frames 211a and 211b of the outer casing 210 as shown in FIGS. 1, 3 and 4. 261b, the sprockets 261c and 261d, and the power transmission means of the roller chain 261e are connected to the left axle shaft 221L. Therefore, when the left eccentric shaft 221L rotates in the clockwise direction, when the warm air of the fan heater is blown toward the rear of the left wiper member 240L, and the left eccentric shaft 211L rotates counterclockwise, The warm air of the fan heater of the left wiper member 240L is formed through the air passage 228 formed by the rear surface 226c of the elimination member carver 226 and the front surface 227a of the eccentric shaft carver 225. It is blown to the rear.

In the present invention, a fan heater is adopted as a forced drying means, but is not necessarily limited thereto. The fan heater may be constituted only by a fan (excluding a halogen lamp).

As shown in Fig. 7, the control unit 270 performs the erasing operation by the erasing member and the traveling speed control circuit in the erasing device 200, the erasing operation by the variable contact means control circuit, and the cleaning liquid supply control. In controlling the cleaning liquid supply operation by the circuit and the forced dry operation by the warm air control circuit, the switches S2 to S8 are connected to the operation panel 271 provided with the switches.

Next, the operation of the erasing device 200 configured as described above will be described.

The erasing device 200 is at rest when the erasing device 200 is not used or at the end of the erasing operation by the limit switches 141b provided on both upper and outer sides of the outer casing 210 and the stop switch S4. At the time of stop by the operation, as shown in FIG. 5 (a), the left erasing group L and the right erasing group R are not in contact with the writing member 110 at all times.

Now, it is assumed that the power switch S1 is turned ON while the erasing device 200 is located at the left end of the writing member 110.

When the user presses the right erase switch S3 when the user erases the contents written in chalk on the surface of the writing member 110, the driving motor (in response to the driving signal from the erasing member and the running speed control circuit of the control unit 270). M1) is driven to rotate the left and right side erasing members 230L and 230R via a series of gears 230a to 230e, and again rotates the pinion 131b via a series of gears 230f to 230i. By doing so, the erasing device 200 travels from the left end of the writing member 110 to the right end.

At the same time, the drive motor M2 is driven by a drive signal from the variable contact means control circuit of the controller 270 to clockwise the left and right eccentric shafts 221L and 221R through a series of gears 221a to 230d. As shown in FIG. 5 (b), the left erasing group L made up of the left erasing member 230L and the left wiper member 240L is brought into contact with the writing member 110 as shown in FIG. It becomes

At this time, the ventilation port of the fan heater as the forced drying means 260 is directed toward the rear of the left wiper member 240L in conjunction with the rotation of the left eccentric shaft 221L.

At the same time, the cleaning liquid pump 251 is operated in response to a drive signal from the cleaning liquid supply control circuit of the controller 270 to spray the cleaning liquid from above the left and right erasing members 230L and 230R. Rinse the chalk powder off the surface of the machine.

Accordingly, the left erasing member 230L rotates while sliding in contact with the writing member 110 to erase the contents of chalk on the writing member 110, and the left wiper member 240L is the writing member 110. Slide contact to remove the remaining cleaning liquid on the surface.

In addition, it is difficult to sufficiently remove the cleaning liquid remaining on the surface of the writing member 110 using only the left wiper member 240L, that is, the humidity of the room is higher than necessary or the temperature of the room is low so that the drying speed may be slow. In this case, the hot air switch S7 or the hot air switch S7 and the low speed switch S8 are simultaneously pressed. Then, the fan heater, which is the forced drying means 260, is actuated by a signal from the warm air control circuit of the controller 270 to blow the warm air toward the rear of the left wiper member 240L. Dries the surface quickly.

For reference, in this embodiment, the rotation speed of the erasing member 230 is set to about 200 to 300 r.p.m. That is, as the number of rotations of the eliminating member 230 is increased, the eliminating effect is maximized, and the dual effect of automatically dewatering the contaminated cleaning liquid infiltrated into the eliminating member 230 by the high speed rotation is achieved. have.

The erasing device 200 travels from the left end of the writing member 110 to the right end according to the travel guide means 130, and the limit switch 141b installed on the upper right side of the outer casing 210 is the blackboard frame. When contacted with the contact member 141a installed at the right end of the upper frame of the 120, the limit switch 141b sends a detection signal to the control unit 270, and the control unit 270 drives the drive motor by the detection signal. By stopping the M1, the drive motor M2, the cleaning liquid pump 251, and the fan heater, the erasing operation by the erasing device 200 is terminated. Therefore, the erasing device 200 is stopped at the right end of the writing member 110 is located.

In addition, in the state where the erasing device 200 is located at the right end of the writing member 110, when the user finishes writing with chalk on the surface of the writing member 110 and then presses the left erase switch S2 to erase it, the control unit The drive motor M1 is driven by a drive signal from the erasing member and the traveling speed control circuit of 270 to rotate the left and right side erasing members 230L and 230R through a series of gears 230a to 230e, By again rotating the pinion 131b via a series of gears 230f to 230i, the erasing device 200 travels from the right end of the writing member 110 to the left end.

At the same time, the drive motor M2 is driven by a drive signal from the variable contact means control circuit of the controller 270 to counterclockwise the left and right eccentric shafts 221L and 221R through a series of gears 221a to 230d. By rotating in the direction, as shown in FIG. 5 (c), only the right erasing member 230R and the right erasing group R made up of the right wiper member 240R are in contact with the writing member 110. As shown in FIG. It becomes

At this time, in conjunction with the rotation of the left eccentric shaft 221L, the air outlet of the fan heater, which is the forced drying means 260, is directed toward the rear of the right wiper member 240R via the air passage 228.

At the same time, the cleaning liquid pump 251 is operated in response to a drive signal from the cleaning liquid supply control circuit of the controller 270 to spray the cleaning liquid onto the left and right erasing members 230L and 230R, thereby to the surface of the writing member 110. Rinse off the chalk powder that comes off.

Accordingly, the right erasing member 230R rotates while sliding in contact with the writing member 110 to erase the contents of the chalk writing on the writing member 110, and the right wiper member 240R is the writing member (R). 110) and slide contact to remove the cleaning liquid remaining on the surface.

In addition, the erasing device 200 travels from the right end of the writing member 110 to the left end in accordance with the travel guide means 130, so that the limit switch 141b provided on the upper left side of the outer casing 210 is When it comes into contact with the contact member 141a provided at the left end of the upper frame of the blackboard frame body 120, the limit switch 141b sends a detection signal to the control unit 270, and the control unit 270 responds to the detection signal. By stopping the driving motor M1, the driving motor M2, the cleaning liquid pump 251, and the fan heater, the erasing operation by the erasing device 200 is terminated.

Therefore, the erasing device 200 is located in the stopped state at the left end of the writing member (110).

In addition, when the user wants to erase a part of the chalk writing content on the writing member 110 as necessary, the moving device S5 and the stop switch S4 are used to move the erasing device 200 to a desired position. After the movement (in this case, only the driving motor M1 is driven by the control unit 270), the left erase switch S2 or the right erase switch S3 may be selected in accordance with the driving direction to be erased.

Therefore, in the erasing apparatus of this embodiment, the contents written in chalk on the writing member can be erased not only when traveling in the back road but also when traveling back home, and only part of the contents can be erased as necessary.

8 illustrates a modification of the erasing member 230 and the wiper member 240.

In this embodiment described above, two wiper members 240 are provided by the protrusions 227 and 227 of the erasing member carver 226, respectively, as shown in Fig. 8A. The one wiper member 240 may be provided and configured, respectively.

In this embodiment, the upper and lower portions of the variable contact means 220 are formed by shafting two erasing members 230L and 230R between the variable frames 222a and 222b, but are shown in Fig. 8B. As shown in FIG. 8 (b), one wiping member may be formed by shafting, and in the left and right wiper members 240L and 240R provided at both protrusions 227 and 227 of the wiping member cover portion 226, FIG. ) And one or two may be provided respectively as shown in FIG.

In this case, the one wiping member 230 is brought into contact with the writing member 110 along the driving direction of the erasing device 200, and the left wiper member 240L and the right wiper member are contacted with each other. (240R) the distance between the writing member 110 and the erasing member 230 and the left and right wiper member with respect to the eccentric distance (Ld) (Rd) of the left and right eccentric shaft (222L) (222R) so that either side can selectively contact What is necessary is just to adjust the space | interval LT (RT) of 240L (240R) suitably.

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

① By considering the automatic erasing of the board, you don't have to erase it with the eraser.

(2) Since the erasing device reciprocates horizontally with respect to the writing surface of the flat board body, the erasing device does not interfere with the peripheral structure of the board body.

③ By using the brush drive motor, the power required for the horizontal rotation of the brush and the horizontal driving of the eliminating device can be shared so that the overall power transmission system can be more efficient.

④ Easy disassembly and assembly and maintenance by installing the eliminating device on the front and the outside of the main board.

⑤ By considering the brush and wiper member to move together under the same power transmission means, the cleaning and erasing effect by the merge control is large and the space utilization rate is high due to the technology composition.

⑥ By controlling the forced drying means by the wind direction adjusting means, it is possible to quickly dry the wet state of the wet writing surface by washing and cleaning work on both sides by only one fan heater.

Claims (2)

Chalkboard body 100 including a writing member 110, which allows the writing of chalk on the surface, and a blackboard frame body 120 that surrounds and supports the peripheral edge of the writing member, The outer casing 210 having an opening toward the writing member 110 and coupled to the front of the blackboard body 100 to reciprocate and stop from side to side and rotates while slidingly contacting the writing member 110. Cleaning liquid supply means for supplying the left and right erasing members 230L and 230R for erasing the writing contents on the writing member 110 and a cleaning liquid for washing down the writing contents peeled on the writing member upon erasing by the left and right erasing members. 250, the left and right wiper members 240L and 240R for direct sliding contact with the writing member 110 to remove the cleaning liquid remaining on the writing member, and the erasing members 230L and 230R and the left and right wipers. An erasing apparatus 200 including variable contact means 220 for selectively contacting or non-contacting one side of the members 240L and 240R with the writing member 110, Forced drying means 260 is installed adjacent to any one side of the left and right wiper members (240L) (240R), to convert the wind direction by rotating the casing body of the fan, Of the outer casing 210, the erasing device 200, and the forced drying means 260. Water cleaning blackboard, characterized in that consisting of a control unit 270 for controlling the operation The water cleaning blackboard according to claim 1, wherein the wiper member is made of a rubber material having a coating layer formed of a synthetic resin polymer on an outer surface of the contact portion in contact with the surface of the writing member 110.