JPH09123681A - Writing board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically erase written contents without a difficulty by a method wherein a cleaning liquid is circulated through a cleaner while it is made up, and adhered on the surface of a recording medium via an opening of the cleaner. SOLUTION: An endless recording medium 12 is provided inside an electronic blackboard and writing is done on the surface of the frontal stretch of the recording medium 12 with a writing implement. The writing implement uses a kind of ink that can be easily rubbed out by a cleaning liquid. A cleaner 26 is provided on the rear stretch of the recording medium 12, facing the outside. To erase all the written contents, an erasing switch is manipulated to scroll the recording medium 12 and bring a pump 34 into operation. Thereby, cleaning liquid in a storage container 32 is circulated along tubes 30 and 32 through the cleaner 26 and adhered on the surface of the recording medium 12, that is traveling, via an opening 26b of the cleaner 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing board such as a wall-hanging type, stand-supporting type or table-type blackboard, whiteboard, greenboard, etc. for writing on the surface of a recording medium using a writing instrument such as a marker pen.

[0002]

2. Description of the Related Art Conventionally, in this type of writing board, when writing characters and pictures using a writing instrument as disclosed in Japanese Patent Application Laid-Open No. 7-90214 and erasing all of the written contents, water is used. There is a method in which the surface of the recording medium is wiped with a wiping tool impregnated with a cleaner liquid to adhere the cleaner liquid to the surface and the written characters are erased by a chemical reaction.

[0003]

However, in such a conventional writing board, when erasing all of the written contents, it has to be wiped by hand.

Therefore, an object of the present invention is to make it possible to automatically erase all of the written contents in a writing board that writes on the surface of a recording medium using an ink that can be erased with a cleaner liquid. It is in.

[0005]

Therefore, the invention described in claim 1 uses an ink that can be erased with a cleaner liquid 37 to write on the surface of the recording medium 12 as in the following illustrated embodiment. In the writing board such as the electronic blackboard 10, the opening 26b of the cleaner 26 is pressed against the surface of the recording medium 12, and the cleaner 26 is relatively movable along the surface of the recording medium 12. , The cleaning liquid 37 is stored in the storage container 32, and the cleaning liquid 37 is stored in the cleaning device 2.
6. A pump 34 that circulates through 6 is provided, and the pump 34
And an erasing switch 20a for moving the cleaner 26 relative to each other.

When all the written contents are erased, the cleaner switch 26 is operated to relatively move the cleaner device 26 along the surface of the recording medium 12, and the pump 34 is operated to operate the cleaner in the storage container 32. The liquid 37 is circulated through the cleaner device 26, and the opening 2 of the cleaner device 26 is
The cleaner liquid 37 is attached to the surface of the recording medium 12 through 6b. After erasing the written contents, the relative movement of the recording medium 12 and the cleaner 26 is stopped, and the pump 3
Stop the operation of 4.

According to a second aspect of the present invention, in the writing board according to the first aspect, a solenoid valve 31 for shutting off the cleaner liquid 37 entering the cleaner device 26 is provided as in the following illustrated embodiment. It is characterized by comprising a valve.

After erasing the written contents, the valve is closed to shut off the cleaner liquid 37 entering the cleaner device 26, and the cleaner liquid 37 in the cleaner device 26 is sucked and removed, and then the operation of the pump 34 is stopped.

According to a third aspect of the present invention, in the writing board according to the first aspect, the cleaner device 26 can be attached to and detached from the recording medium 12 as in the following illustrated embodiment. It is characterized by

Then, the switching operation member is operated for switching,
When erasing the written contents by operating the erase switch 20a, the cleaner device 26 is attached to the recording medium 12.
Is pressed, and the cleaner device 26 is separated from the recording medium 12 when not erasing.

According to a fourth aspect of the present invention, in the writing board according to the first aspect, for example, as in the following illustrated embodiment, the surface of the cleaner device 26 that comes into contact with the recording medium 12 is, for example, pressed. It is characterized in that the contact surface 26a is subjected to Teflon treatment.

According to a fifth aspect of the present invention, in the writing board according to the first aspect, the surface of the recording medium 12 is subjected to a mat processing as in the following illustrated embodiment, for example. And

According to a sixth aspect of the present invention, in the writing board according to the first aspect, a filtering filter 39 is provided in the circulation path of the cleaner liquid 37, for example, as in the following illustrated embodiment. It is characterized by

According to a seventh aspect of the present invention, in the writing board according to the first aspect, a cleaner liquid for containing the cleaner liquid 37 separately from the storage container 32 is provided as in the following illustrated embodiment. A tank 60 is provided, and the cleaner liquid 37 in the storage container 32 is passed through the cleaner device 26 by the pump 34 to the cleaner liquid 3 therein.
While forming the first circulation path F which circulates while replenishing 7, while separately supplying the cleaner liquid 37 in the cleaner liquid tank 60 with the pump 34 through the storage container 32, supplying the cleaner liquid 37 thereto. It is characterized in that a second circulation path G that circulates is formed.

At the time of erasing, when the pump 34 is operated, first, the cleaner liquid 37 in the cleaner liquid tank 60 is sucked up, and the cleaner liquid 37 is sucked from the cleaner device 26 by using it as priming water. Cleaner liquid 37 after use over time
When is dirty, the cleaner liquid 37 in the cleaner liquid tank 60 is replaced with a new one.

According to the eighth aspect of the present invention, in the writing board according to the seventh aspect, the cleaner liquid tank 60 and the pump 34 in the second circulation path G are provided, for example, as in the following illustrated embodiment. Flow rate adjusting device 63
It is characterized by comprising.

Then, the flow rate adjusting device 63 is appropriately adjusted,
The maximum flow rate flowing through the second circulation path G is adjusted.

According to a ninth aspect of the present invention, in the writing board according to the seventh aspect, the cleaner liquid 37 overflowed from the storage container 32 is transferred to the cleaner liquid tank 60 as in the following illustrated embodiment. And an overflow pipe 61 for guiding the second circulation path G
Is formed.

The cleaner liquid 37 in the storage container 32
When it exceeds a certain amount, it overflows and enters the cleaner liquid tank 60 through the overflow pipe 61.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a writing board according to claim 1. The illustrated writing board is an electronic blackboard 10 which is hung on a wall of a conference room.

The frame case 11 of the electronic blackboard 10 has a flat rectangular shape, is horizontally long, and is provided with a large window hole 11a in the front. Then, a part of a flat recording medium 12 for writing which is stretched in the frame case 11 as described later is exposed from the window 11a. An elongated tray 13 is attached along the lower edge in front of the frame case 11, and a writing implement 14, a wiping implement 15, etc. are placed on the tray 13.

The writing instrument 14 is for writing characters and pictures on the recording medium 12, and is described in, for example, the above-mentioned Japanese Patent Laid-Open No. 7-9.
As described in Japanese Patent No. 0214, an ink that can be instantly erased by adhering a liquid (cleaner liquid) such as water is used. The wiper 15 is
The recording medium 12 is wiped to erase the contents written with the writing instrument 14, and a cleaner liquid capable of erasing the ink of the writing instrument 14 is soaked.

Below the frame case 11, the printer 17 having the paper receiver 16 in the front and the two storage cases 18 and 19 are mounted side by side in this order. On the other hand, the switch group 2 is provided on one side edge of the frame case 11.
0 is provided. The switch group 20 includes a transport switch for transporting the recording medium 12 described above, a read switch for reading the written content on the recording medium 12, an erase switch 20a for erasing the written content, and the like.

Now, in such a frame case 11, a driving roller 22 and a driven roller 23 are provided upright and parallel to each other as shown in FIG. The endless recording medium 12 described above is provided between the rollers 22 and 23.
And the driven roller 23 with a spring (not shown).
The rollers 22 and 23 are urged to stretch them. Then, by operating the transport switch of the switch group 20 described above, the rotation from the drive source (not shown) is transmitted to rotate the drive roller 22 and the driven roller 23 to rotate the recording medium 12 in the left-right direction in the drawing. Transport. In addition,
Reference numeral 24 in the figure denotes a window hole 11 provided on the back side of the recording medium 12.
It is a backing plate that backs the part facing from a.

Further, as shown in FIG. 2, the frame case 1
The reading mechanism section 25 is provided on one side in the apparatus 1. Although not shown in detail in the drawings, the reading mechanism unit 25 is already generally known in copying machines and electronic blackboards of this kind, and reads the writing contents on the recording medium 12 as the recording medium 12 is conveyed. . Then, the reading mechanism section 2
The signal from the No. 5 is input to the printer 17, the read content is reduced and recorded on the recording paper provided in the printer 17, and printed out on the paper receiver 16.

By the way, in the invention described in claim 1, as shown in FIG. 2, the cleaner device 26 is pressed from the outside to the stretched portion on the back side of the endless recording medium 12. The cleaner device 26 has a prismatic shape and has a vertically long opening 26b formed in the pressing surface 26a, and a groove 26c is provided in the opening 26b as can be seen from the cross-sectional view shown in FIG. Then, the linear brushes 27 are provided in two vertical rows in the concave groove 26c, and their tips are made substantially equal to the pressing surface 26a.

In the above-mentioned example, the brush 2 is placed in the groove 26c.
7 are provided in two vertical columns, but partition plates 28 may be provided in two vertical columns instead of the brushes 27 as shown in FIG. 4, and rollers 29 are rotatably provided as shown in FIG. It may be configured. In this case as well, it is preferable that the outer surface of the roller 29 is substantially equal to the pressing surface 26a as shown in the figure.

As shown in FIG. 2, the cleaner 26 of this type is provided with an inlet port 26d communicating with the recessed groove 26c at the upper portion thereof, and a tube 30 is connected to the inlet port 26d, and a solenoid valve in the middle thereof is connected. Pipe connection to the storage container 32 via 31. In addition, a discharge port 26e that also communicates with the recessed groove 26c is provided in the lower portion, and another tube 33
Similarly, the storage container 3 is connected via the pump 34 in the middle.
Pipe connection to 2.

The storage container 32 is, for example, as shown in FIG. 6, in which a cleaner liquid 37 is contained in a bottle-shaped container 36, and a cap 38 is attached to an opening 36a of the container 36. A filter 39 for filtration is suspended from the cap 38 in the container 36, and a discharge pipe 40 and an introduction pipe 41 are provided through the cap 38. The above-mentioned tube 30 is attached to the discharge pipe 40, the above-mentioned other tube 33 is attached to the introduction pipe 41, and the discharge pipe 40 is used as the filter 3
Extending through 9 to the bottom of the container 36, while introducing pipe 4
1 is up to the mouth portion 36a.

As a result, from the storage container 32 to the discharge pipe 40
Through the solenoid valve 31 to reach the inlet port 26d of the cleaner device 26, the groove 26c of the cleaner device 26, the outlet port 26e, and the other tube 33. Passing through the pump 34 on the way,
A circulation path is formed through the introduction pipe 41 and returns to the original storage container 32. Then, the pump 34 is operated, and the cleaner liquid 37 is circulated through the circulation path while being filtered by the filtration filter 39.

In the illustrated example, the storage container 3 shown in FIG.
2 is stored in the storage case 18 shown in FIG. 1, and the pump 34 shown in FIG. 2 is stored in the storage case 19 shown in FIG.

In the second aspect of the invention, it is essential to provide a valve for shutting off the cleaner liquid 37 entering the cleaner device 26 like the solenoid valve 31 described above. Of course, the solenoid valve is not limited to the illustrated example, but may be a mechanical type that operates by a cam or the like to shut off the cleaner liquid. Further, in the invention according to the sixth aspect, it is indispensable to provide a filtering filter in the middle of the circulation path of the cleaner liquid like the above-mentioned filtering filter 39. It may be provided not only in the container 26 as in the illustrated example, but also in another portion of the circulation path.
By thus providing the filtering filter 39 in the middle of the circulation path, impurities mixed in the cleaner liquid 37 are removed by the filtering filter 39.

The invention described in claim 1 is configured as described above, for example. At the time of use, the writing tool 14 on the tray 13 is held in the hand, and characters or pictures are written on the surface of the recording medium 12 while erasing with the wiping tool 15 as needed, as in a normal electronic blackboard. When the recording medium exposed from the window hole 11a is insufficient in space, the conveyance switch in the switch group 20 is pressed to convey the recording medium 12, and the unused margin portion is appropriately fed out into the window hole 11a. Face it and write in it.

When printing out the written contents,
Press the read switch in the switch group 20 to press the recording medium 12
Then, the read contents of the recording medium 12 are read by the reading mechanism unit 25, the read contents are recorded on the recording paper by the printer 17, and printed out on the paper receiver 16.

When erasing all the contents written on the recording medium 12 at once, the erasing switch 20a in the switch group 20 is pressed to convey the recording medium 12 and operate the pump 34. Then, the concave groove 26 in the cleaner device 26
The recording medium 12 that has been pressed against the cleaner device 26 by tension is further attracted by making the inside of c negative, and the recording medium 12 is brought into close contact with the pressing surface 26a of the cleaner device 26 and the opening 26b is formed in the recording medium 12.
Seal. At this time, as shown in FIG.
The surface of 2 is applied to the tip of the brush 27 to prevent the recording medium 12 from being deformed and entering the concave groove 26c. Then, by the operation of the pump 34, the cleaner liquid 37 in the storage container 32 is circulated through the concave groove 26c in the cleaner device 26 as shown by the arrow in FIG. 7, and the recording medium 12 is conveyed while passing through the opening 26b of the cleaner device 26. The recording medium 12
The cleaner liquid 37 is attached to the surface of the. In the illustrated embodiment, since the brush 27 is provided in the concave groove 26c, the cleaner 27 is sufficiently held by the brush 27 and the recording medium 12 is held.
There is an effect that it can be applied evenly on the surface of.

After erasing the written contents, the erase switch 20a is pressed to stop the conveyance of the recording medium 12 and stop the operation of the pump 34. According to the second aspect of the present invention, the solenoid valve 31 is closed for a certain time by the timer to shut off the cleaner liquid 37 entering the cleaner device 26 from the storage container 32 as shown in FIG. The cleaner liquid 37 of the cleaner device 26 including the ink adhering to the pressing surface 26a is also included.
Is forcibly sucked and removed, and after a predetermined time has been completely sucked and removed, the operation of the pump 34 is stopped and the solenoid valve 31 is opened. This prevents the cleaner liquid 37 from leaking from the cleaner device 26 after erasing.

At this time, for example, a 3-port valve is used as the solenoid valve 31, and when the remaining cleaner liquid is sucked and removed, the passage from the storage container 32 to the cleaner device 26 is shut off and the passage leading to the atmosphere is opened. Then, air can be sucked in to further enhance the suction effect of the residual cleaner liquid.

According to the third aspect of the invention, the cleaner for the recording medium 12 is automatically operated by switching the switching operation member such as a switch or a lever provided at an appropriate place and automatically when the erase switch 20a is operated. The container 26 is moved toward and away from the container. That is, when erasing the written contents, the recording medium 1
When the recording medium 12 is applied to the cleaner device 26 with the tension of 2 as shown in FIG. 7 and is not erased, the cleaner device 26 is operated via a link mechanism by operating a solenoid, not shown, for example.
To move the cleaner 26 away from the recording medium 12 as shown in FIG.

In the invention described in claim 4, the recording medium 12
Teflon treatment is applied to the pressing surface 26a of the cleaner device 26 that comes into contact with the Teflon tape, for example, by attaching a Teflon tape. By doing so, the recording medium 1 is rubbed and rubbed.
The recording medium 12 is prevented from being scratched on the surface of the recording medium 12.
The frictional resistance between the cleaner 26 and the cleaner 26 is reduced.

In the invention described in claim 5, the recording medium 12
For example, a sanding process is applied to the surface of the to make a mat processing. By doing so, the surface roughness of the recording medium 12 is increased, writing to the recording medium 12 is facilitated, and the written contents are easily seen, for example, from the side by eliminating reflection.

By the way, in the above-described embodiment, an example in which the electronic blackboard 10 is a wall-mounted type has been shown. However, in the invention described in claim 1, the writing board is not limited to the wall-mounted type, and may be a stand-supported type supported by the stand 42 as shown in FIG. It may be a tabletop type that can be used on the tabletop.

Further, in the above-mentioned embodiment, the recording medium 12 is conveyed in the left-right direction, but it may be conveyed in the up-down direction as shown in FIG. That is, in FIG. 11, the driving roller 22 and the driven roller 23 are provided horizontally,
Further, a guide roller 43 is also provided so that the rollers 22 and
The recording medium 12 is stretched in a triangular shape by extending it between 23 and 43. Then, the cleaner device 26 is pressed from below onto the horizontal portion of the recording medium 12 that is stretched between the drive roller 22 and the guide roller 43. The cleaner device 26 is provided on the liquid receiving tray 44 so that if the cleaner liquid 37 leaks from the cleaner device 26, it can be received by the liquid receiving tray 44 and returned to the storage container 32 through the tube 45. It has become. In addition, in FIG. 11, the reference numerals used in the corresponding portions of the above-described example are used as they are,
Detailed explanation is omitted.

Further, in the above-described embodiment, an example in which the recording medium 12 is rotatably conveyed as an endless belt has been shown. However, in the invention described in claim 1, the recording medium may be in the form of an end belt, and the recording medium may be stretched between a plurality of rollers for reciprocating conveyance. In addition, when the recording medium is a roll-up screen type and writing is performed,
Alternatively, the recording medium may be rewound and hooked, and the recording medium may be stretched in a screen shape. After use, the hook may be removed and the recording medium may be automatically wound into a roll. Then, for example, a cleaner device is provided at a position where the recording medium is pulled out so as to sandwich the recording medium between the back plate and the cleaner, and the cleaner liquid is attached by the cleaner device when the recording medium is wound up after use to erase the written contents.

Furthermore, in the above-described embodiment, the cleaner 26 is fixed and the recording medium 12 is conveyed.
However, the invention described in claim 1 is not limited to this, and the point is that the cleaner device can be relatively movable along the surface of the recording medium. For example, as shown in FIG. 12, when erasing the written contents, the recording medium 12 may be fixed in a plate shape, and the cleaner 26 may be moved along the surface of the recording medium 12. In the embodiment shown in FIG. 12, the rail 5 is provided on the upper edge of the frame case 11.
0 is provided, the slider 51 is movable left and right along the 0, and the upper part of the traveling body 52 is attached to the slider 51.

As can be seen from the cross-sectional view shown in FIG. 13, a cleaner device 26 is provided integrally with the reading mechanism section 25 in the case 53 of the traveling body 52. Then, the cleaner 26 is biased by the spring 54, and the plate-shaped recording medium 12
Be pressed against. A lever-shaped switching operation member 55 is provided on the outer surface of the case 53, and when the switching operation member 55 is rotated, the cleaner 54 is pressed against the recording medium 12 by the spring 54 to erase the written contents, and the erase operation is performed. If not, the cleaner device 26 is moved against the spring 54 to separate the cleaner device 26 from the recording medium 12.

By the way, such a traveling body 52 has its upper portion attached to the above-mentioned slider 51 via the attachment shaft 56, and the outer periphery of the lower roller 57 is brought into contact with the lower edge of the front surface of the frame case 11 as shown in FIG. Become. The rollers 57 are supported below the traveling body 52 so as to be rotatable about a vertical shaft 58. Then, if necessary, the traveling body 52 is attached to the mounting shaft 5
Rotate about 6 to open it as shown in FIG. Note that, also in the examples shown in FIGS. 12 to 15, the reference numerals used in the corresponding portions of the above-described examples are used as they are, and detailed description thereof will be omitted.

According to the invention described in claim 7, FIG.
As shown in FIG. 5, a cleaner liquid tank 60 that stores the cleaner liquid 37 is provided separately from the storage container 32 described above. In addition, as shown in FIG. 17, for example, in the storage container 32 as described above, the overflow port 3 is provided from below the shoulder portion of the container 36.
6b downwards and the overflow pipe 6
Fit one end of 1. The overflow pipe 61 is shown in FIG.
As shown in FIG. 6, the other end is the mouth 60 of the cleaner liquid tank 60.
Insert from a. The cleaner liquid tank 60 is a container made of resin or the like, and contains a much larger amount of the cleaner liquid 37 than the storage container 32.

Further, one end of the bypass pipe 62 is inserted into the opening 60a of the cleaner liquid tank 60. Bypass pipe 62
Is connected to the above-mentioned tube 33 before the pump 34. As a result, in the invention according to claim 7, the first circulation path F (the solid line in FIG. 16) that circulates the cleaner liquid 37 in the storage container 32 through the cleaner device 26 by the pump 34 while supplying the cleaner liquid 37 thereto. (Circuit path indicated by arrow)
In addition to the above, a second circulation path G (indicated by a dotted arrow in FIG. 16) that circulates the cleaning liquid 37 in the cleaning liquid tank 60 through the storage container 32 by the pump 34 and replenishing the cleaning liquid 37 thereto Circuit).

When the pump 34 is operated to erase the written contents on the recording medium 12, first, the cleaner liquid 37 in the cleaner liquid tank 60 is sucked up, and the cleaner liquid 37 is sucked from the cleaner device 26 by using it as priming water. .
When the pump 34 is operated, first, the height difference h between the cleaner liquid level in the cleaner liquid tank 60 and the suction port of the pump 34 (see FIG. 18) so that the cleaner liquid 37 in the cleaner liquid tank 60 can be sucked up. It is preferable to install the cleaner liquid tank 60 and the pump 34 in close proximity to each other in order to reduce (see (1)).

By the way, as shown in FIG. 18, the cleaner liquid level in the storage container 32 and the inlet port 26d of the cleaner device 26 are shown.
Assuming that the height difference between them is H, the pump pressure must be set higher as the H becomes larger.
Thus, the suction force of the cleaner device 26 with respect to is increased.
Therefore, the storage container 32 should have the best adsorption power.
Set the position of.

In the eighth aspect of the invention, as shown in FIG. 16, a flow rate adjusting device 63 is provided between the cleaner liquid tank 60 and the pump 34 in the second circulation path G. Then, the flow rate adjusting device 63 is adjusted to adjust the maximum flow rate of the cleaner liquid 37 flowing through the bypass pipe 62. As a result, the cleaner liquid 37 in the cleaner liquid tank 60 is used as the priming water so that the cleaner liquid 37 can be reliably sucked from the cleaner device 26 by the pump 34, and the cleaner device 26 has an adsorption force for adsorbing the recording medium 12. Fine-tune.

In the ninth aspect of the invention, as described above, the overflow pipe 61 for guiding the cleaner liquid 37 overflowing from the storage container 32 to the cleaner liquid tank 60 is provided to form the second circulation path G. Become. And
When the cleaner liquid 37 in the storage container 32 exceeds a certain amount, it overflows and enters the cleaner liquid tank 60 through the overflow pipe 61. As a result, the pump pressure for sucking the cleaner liquid 37 is kept constant by keeping the cleaner liquid level in the storage container 32 constant, and the recording medium 1
The fluctuation of the suction force of the cleaner device 26 with respect to 2 can be eliminated.

In the embodiment shown in FIGS. 16 to 18 described above, as shown in FIG. 19, storage cases 65 and 66 are sequentially provided under the printer 17, and the pump 34 is stored in the storage case 65 above. In addition, the cleaner liquid tank 60 is stored in the lower storage case 66. Further, another storage case 67 is provided just behind the position of the erasing switch 20a of the frame case 11, and the storage container 32 is provided therein.
Will be stored.

In FIG. 20, a cleaner liquid tank 60 is provided separately from the storage container 32 on the electronic blackboard shown in FIG. 11 for conveying the recording medium 12 in the vertical direction, and the cleaner liquid 37 in the storage container 32 is cleaned by the pump 34. In addition to forming the first circulation path F through which the cleaner liquid 37 is circulated through the vessel 26 while replenishing it, the cleaner liquid tank 6 is provided separately.
The cleaner liquid 37 in 0 is circulated while the cleaner liquid 37 is being replenished by the pump 34 through the storage container 32 by the pump 34.
The circulation path G is formed. In addition, also in FIG. 20, the reference numerals used for the corresponding portions in FIG. 11 are used as they are, and redundant description will be omitted.

[0055]

Therefore, according to the first aspect of the invention, when the erase switch is operated when erasing all of the written contents, the cleaner is relatively moved along the surface of the recording medium and the pump is operated. It operates and circulates the cleaner liquid in the storage container through the cleaner device while replenishing the cleaner liquid, so the cleaner liquid adheres to the surface of the recording medium through the opening of the cleaner device and the written contents are automatically erased without trouble. be able to.

According to the second aspect of the invention, after the written contents are erased, the relative movement of the recording medium and the cleaner is stopped, while the valve is closed to shut off the cleaner liquid entering the cleaner, and Aspirate the cleaner liquid remaining in the cleaner device and the cleaner liquid around the opening, and then stop the pump operation. Therefore, it is possible to reliably prevent the cleaner liquid from leaking from the opening of the cleaner after erasing.

According to the third aspect of the present invention, the cleaner is pressed against the recording medium when the contents to be written are erased by switching the switching operation member, and the cleaner is removed from the recording medium when the contents are not erased. Release. Therefore,
When the written contents are not erased, remove the cleaner from the recording medium to prevent the cleaner from rubbing against the recording medium.
It is possible to prevent disturbance of the written contents on the recording medium and scratches on the medium surface.

According to the fourth aspect of the present invention, since the surface of the cleaner that contacts the recording medium is treated with Teflon, the surface of the recording medium is scratched when the cleaner is relatively moved along the surface of the recording medium. It is possible to eliminate sticking and reduce frictional load.

According to the fifth aspect of the present invention, since the surface of the recording medium is subjected to the mat processing, the surface roughness of the recording medium is increased to facilitate writing on the recording medium and to reduce reflection. Thus, it is possible to make the written contents easy to see even from the side, for example.

According to the invention described in claim 6, by providing the filter for filtration in the circulation path of the cleaner liquid,
Impurities mixed in the cleaner liquid can be removed.

According to the invention described in claim 7, since the cleaner liquid tank is provided separately from the storage container, the storage container can be downsized and the recording medium can be adsorbed by the cleaner device in the best condition. It is possible to set the pump pressure and arrange the storage container so as to have a pumping height that allows the cleaner liquid to be appropriately sucked up by the pump pressure.

Further, when the pump is operated, first, the cleaner liquid in the cleaner liquid tank is sucked up, and the cleaner liquid is sucked from the cleaner device by using it as priming water, so that the reliability of the operation can be improved. Further, the cleaner liquid can be easily replaced by providing the cleaner liquid tank separately from the storage container.

According to the invention described in claim 8, the flow rate adjusting device is appropriately adjusted, the maximum flow rate flowing through the second circulation path is adjusted, and the cleaner liquid sucked from the cleaner liquid tank becomes priming water. In the best condition, the cleaner can adsorb the recording medium.

According to the ninth aspect of the present invention, when the amount of the cleaner liquid in the storage container exceeds a certain amount, it overflows and enters the cleaner liquid tank through the overflow pipe. It is possible to keep the cleaner liquid level constant and to eliminate the fluctuation of the lift so that the suction force of the cleaner device with respect to the recording medium does not change.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the invention according to claim 1, and is a wall-hanging use state diagram of an electronic blackboard.

FIG. 2 is a perspective view showing a schematic configuration of an internal mechanism thereof.

FIG. 3 is a transverse sectional view of a cleaner used in the electronic blackboard.

FIG. 4 is a cross-sectional view of another example of the cleaner used in the electronic blackboard.

FIG. 5 is a transverse sectional view of still another example of the cleaner used in the electronic blackboard.

FIG. 6 is a vertical cross-sectional view of a storage container used in the electronic blackboard.

FIG. 7 is an explanatory diagram showing a flow of a cleaner liquid when erasing written contents on the electronic blackboard.

FIG. 8 is an explanatory diagram showing a flow of the cleaner liquid when the residual cleaner liquid is sucked and removed after the written contents are erased.

FIG. 9 is an explanatory diagram showing a state in which the cleaner is separated from the recording medium in the electronic blackboard.

FIG. 10 is an explanatory view of a usage state when the electronic blackboard is used while being supported by a stand.

FIG. 11 shows another embodiment of the invention according to claim 1, and is a perspective view showing a schematic configuration of an internal mechanism of the electronic blackboard.

FIG. 12 is a perspective view of a stand-supporting type electronic blackboard according to still another embodiment of the present invention.

FIG. 13 is a partial cross-sectional view shown in the arrow direction along the line AA.

FIG. 14 is a vertical sectional view as seen in the direction of the arrow along the line BB.

FIG. 15 is a side view of the electronic blackboard with the traveling body rotated.

FIG. 16 is a perspective view showing an embodiment of the invention according to claim 7 and showing a schematic configuration of an internal mechanism of the electronic blackboard.

FIG. 17 is a vertical cross-sectional view of a storage container used in the electronic blackboard.

FIG. 18 is an explanatory diagram showing a flow of a cleaner liquid when erasing written contents on the electronic blackboard.

FIG. 19 is a use state diagram when the electronic blackboard is used while being supported by a stand.

FIG. 20 shows another embodiment of the invention as set forth in claim 7, and is a perspective view showing a schematic configuration of an internal mechanism of the electronic blackboard.

[Explanation of symbols]

 10 Electronic Blackboard (Writing Board) 12 Recording Medium 20a Erasing Switch 26 Cleaner 26a Pressing Surface 26b Opening 31 Solenoid Valve 32 Storage Container 34 Pump 37 Cleaner Liquid 39 Filtering Filter 55 Switching Operation Member 60 Cleaner Liquid Tank 61 Overflow Pipe 63 Flow Rate Adjusting device F First circuit G Second circuit

Claims (9)

[Claims] 1. A writing board for writing on the surface of a recording medium using an ink that can be erased with a cleaner liquid, in which an opening of a cleaner is pressed against the surface of the recording medium, and the surface of the recording medium is covered. While the cleaner device is relatively movable, the storage container stores the cleaner liquid, a pump is provided to circulate the cleaner liquid through the cleaner device, and the pump is operated and the cleaner device is relatively moved. A writing board with a switch. 2. The lighting board according to claim 1, further comprising a valve that shuts off the cleaner liquid that enters the cleaner device. 3. The writing board according to claim 1, wherein the cleaner device can be brought into and out of contact with the recording medium. 4. The writing board according to claim 1, wherein the surface of the cleaner that comes into contact with the recording medium is treated with Teflon. 5. The writing board according to claim 1, wherein the surface of the recording medium is matt-treated. 6. The writing board according to claim 1, wherein a filter for filtration is provided in the middle of the circulation path of the cleaner liquid. 7. A cleaner liquid tank for storing the cleaner liquid is provided separately from the storage container, and the cleaner liquid in the storage container is circulated through the cleaner device by the pump while supplying the cleaner liquid thereto. And a second circulation path for circulating the cleaner liquid in the cleaner liquid tank through the storage container by the pump while supplying the cleaner liquid to the cleaner liquid. The writing board described in 1. 8. The writing board according to claim 7, further comprising a flow rate adjusting device between the cleaner liquid tank and the pump in the second circulation path. 9. The writing board according to claim 7, wherein an overflow pipe for guiding the cleaner liquid overflowing from the storage container to the cleaner liquid tank is provided to form the second circulation path.